JP5014093B2 - Pump measuring device inspection apparatus and method - Google Patents

Description

  The present invention relates to a pump control technique, and more particularly to a technique for inspecting a measuring device that measures a characteristic value of a pump.

  In a pump system of a general air conditioning equipment provided in an office building, a public facility, a hotel, etc., an inverter is provided in a pump (secondary pump) that feeds heat source water to variably control the pump rotation speed. As a result, the pump can be controlled so that the heat source water is fed by a necessary flow rate on the load side, and the power consumption of the pump can be reduced.

In such a pump system, characteristic values indicating the operation state of the pump, such as a flow rate, a head, a shaft power, and a pump rotation speed ratio, which are necessary for the operation control of the pump, are represented by a flow meter, a pressure gauge, a power meter, and a rotation speed counter. Based on the measurement results, other pump characteristic values that are not measured are calculated using pump operating characteristics such as a lift curve, a shaft power curve, and a resistance curve.
As a specific example of the past, based on the pump rotation speed and pump power consumption, the flow rate and head during pump rotation speed control are calculated based on the lift curve function data, shaft power curve function data, and resistance curve data corresponding to the rotation speed. There is something to be calculated (for example, see Patent Document 1).

JP 2006-307682 A

  In such a pump system, there may be an error in the measured value due to the influence of the installation environment, secular change, etc. in the above measuring instrument. There was a need to perform maintenance. At this time, in maintenance, for example, temporarily installing a calibrated measuring device and comparing it with the measurement value of the sensor or measuring device to be inspected, or removing and calibrating the sensor or measuring device to be inspected Is done.

  Therefore, it is necessary to suspend the normal operation of the pump system when inspecting the measuring instrument, and the pump system with a high operation rate has the problem that the influence of the stop of the normal operation occurs. It was. In addition, since the maintenance work as described above is required when inspecting the measuring instrument, there is a problem that a relatively large work load is generated and the management cost is increased.

  The present invention is intended to solve such a problem, and pump measurement capable of inspecting a pump measuring instrument while maintaining normal operation of the pump system and without generating a work load for inspection. The object is to provide an equipment inspection device.

  In order to achieve such an object, the pump measuring device inspection device according to the present invention measures a characteristic value indicating the operation status of the pump from a pump whose rotation speed is variably controlled at an arbitrary rotation speed during control. It is a pump measuring device inspection device that inspects the measurement value of a measuring device, and includes a reference lift curve indicating a relationship between a flow rate related to the pump and a lift at a predetermined reference rotation speed, and a flow rate and a shaft related to the pump at the reference rotation speed. A storage unit that stores a reference shaft power curve indicating a power relationship, and a control flow rate, a control head, a control shaft power, and a rotation speed ratio that indicate the characteristics of the pump operating at the control rotation speed. While acquiring any two of them as input characteristic values, the data acquisition unit for acquiring the inspection characteristic values measured by the target measuring device to be inspected, and the arrangement of the pump based on the arbitrary characteristic values Specify the reference operating point consisting of the intersection of the resistance curve indicating the relationship between the pump flow rate and the head when the pump speed is controlled with a constant resistance and the reference head curve of the storage unit, and operate at the reference speed. The reference operating point specifying unit that calculates the reference flow rate or the head of the pump at the time of pumping, and the flow rate of the pump when the pump rotational speed is controlled with the pump piping resistance being constant based on any characteristic value The reference power point that is the intersection of the control time axis power curve indicating the relationship of the shaft power and the reference axis power curve of the storage unit is specified, and the reference flow rate or reference shaft power of the pump when operating at the reference rotation speed is calculated. Based on the reference power point specifying unit and the input characteristic value, the reference operating point specifying unit and the reference power point specifying unit sequentially calculate the characteristic value at the reference operating point and the reference power point, thereby obtaining the desired unknown characteristic value. The measurement value of the target measurement device is inspected by comparing the output characteristic value obtained by the characteristic value calculation unit calculated as the force characteristic value and the inspection characteristic value obtained by the data acquisition unit. A measurement value inspection unit.

  At this time, the storage unit stores a function shape formula related to the control time axis power curve, and the data acquisition unit inputs any two of the control flow rate, the control lift, and the rotation speed ratio as input characteristic values. The reference operating point specifying unit calculates the reference flow rate at the reference operating point based on the input characteristic value acquired by the data acquiring unit, and the reference driving point specifying unit calculates the reference operating point specifying unit. Based on the reference flow rate, the reference shaft power at the reference power point is calculated, and in the characteristic value calculation unit, the reference power calculated from the reference flow rate calculated by the reference operating point specifying unit and the reference shaft power calculated by the reference power point specifying unit The control time axis power curve is specified based on the point and the control time axis power curve function shape formula of the storage unit, and the control time axis power is calculated as the output characteristic value from the control flow rate and the control time axis power curve. May be.

  In addition, the storage unit stores function shape formulas related to the control time axis power curve and the resistance curve, and the data acquisition unit acquires the control flow rate and the control time axis power related to the pump as input characteristic values. The specifying unit specifies a pump control time axis power curve based on the control power point consisting of the input characteristic value acquired by the data acquisition unit and the control time axis power curve function shape formula of the storage unit, and this control time Calculate the reference flow rate at the reference power point from the intersection of the shaft power curve and the reference shaft power curve, and at the reference operating point specifying unit, based on the reference flow rate calculated by the reference power point specifying unit, the reference lift at the reference operating point And the characteristic value calculation unit calculates the resistance curve of the pump based on the reference flow rate calculated by the reference power point specifying unit, the reference head calculated by the reference operating point specifying unit, and the resistance curve function shape formula of the storage unit. Identify this resistance It may be calculated to control the time of lift or rotational speed ratio of the pump from the curve and the control time flow rate as an output characteristic value.

  In addition, the storage unit stores a function shape formula related to the control time axis power curve, and the data acquisition unit acquires either the control head or the rotation speed ratio related to the pump and the control time axis power as input characteristic values. Based on one of the control head and the rotation speed ratio acquired by the data acquisition unit and the assumed characteristic value consisting of the characteristic value assumed for the other of the control head and the rotation speed ratio in the operating point specifying unit. The reference flow rate at the reference operating point is calculated, the reference power point specifying unit calculates the reference shaft power at the reference power point based on the reference flow rate calculated by the reference operating point specifying unit, and the characteristic value calculating unit Control time axis power curve based on the reference power point composed of the reference flow rate calculated by the reference operation point specifying unit and the reference shaft power calculated by the reference power point specifying unit and the control time axis power curve function shape formula of the storage unit. The verification characteristic value corresponding to the assumed characteristic value is calculated based on the control time axis power curve and the control time axis power, and the assumption is determined according to the comparison result between the verification characteristic value and the assumed characteristic value. The characteristic value may be calculated as the output characteristic value.

  Further, the storage unit stores function shape formulas related to the control time axis power curve and the resistance curve, respectively, and the data acquisition unit uses either the control head or the rotation speed ratio related to the pump and the control time axis power as input characteristic values. And the reference power point specifying unit acquires one of the control head and the rotation speed ratio acquired by the data acquisition unit, the assumed characteristic value that is assumed for the pump control flow rate, and the storage unit Based on the control time axis power curve function shape formula, the control time axis power curve of the pump is specified, and the reference flow rate at the reference power point is calculated from the intersection of the control time axis power curve and the reference axis power curve. The operating point specifying unit calculates the reference head of the pump at the reference operating point based on the reference flow rate calculated by the reference power point specifying unit, and the characteristic value calculating unit calculates the reference flow rate calculated by the reference power point specifying unit and The pump's resistance curve is specified based on the reference head calculated by the quasi-operating point specifying section and the resistance curve function shape formula of the storage section. From this resistance curve and the control head or rotation speed ratio that is the input characteristic value The control flow rate for verification corresponding to the control flow rate that is the assumed characteristic value is calculated, and the control flow rate that is the assumed characteristic value is used as the output characteristic value according to the comparison result of the verification control flow rate and the control flow rate. You may make it calculate.

  Further, the storage unit stores a measurement error range for the measurement value of the target measuring device, and the measurement value inspection unit calculates the output characteristic value within the measurement error range of the inspection characteristic value based on the measurement error range of the storage unit. The presence or absence of abnormality of the measurement value of the target measurement device may be determined according to whether or not it is indicated.

  Further, the pump measuring device inspection method according to the present invention includes a storage unit and a calculation unit for a measuring device that measures a characteristic value indicating an operation state of the pump from a pump whose rotation speed is variably controlled at an arbitrary control rotation speed. A pump measuring device inspection method for inspecting a measured value using a pump measuring device inspection device including a processing unit, and a reference head curve indicating a relationship between a flow rate and a pump related to a pump at a predetermined reference rotation speed by a storage unit And a storage step for storing a reference shaft power curve indicating the relationship between the flow rate related to the pump at the reference rotation speed and the shaft power, and a control flow rate indicating characteristics of the pump operating at the control rotation speed by the data acquisition unit. In addition to acquiring any two of the control head, control shaft power, and rotational speed ratio as input characteristic values, the measurement measured by the target measuring device to be inspected is used. The relationship between the pump flow rate and the head when the rotation speed of the pump is controlled by the data acquisition step for acquiring the characteristic value and the pump processing resistance while the pump piping resistance is constant based on the arbitrary characteristic value by the arithmetic processing unit. A reference operating point specifying step for specifying a reference operating point consisting of an intersection of a resistance curve and a reference lift curve of a storage unit, calculating a reference flow rate or a reference lift of the pump when operating at a reference rotation speed, and an arithmetic processing unit Based on an arbitrary characteristic value, the control time axis power curve indicating the relationship between the pump flow rate and the shaft power when the pump rotation speed is controlled with the pump piping resistance being constant, and the reference axis power curve of the storage unit A reference power point consisting of the intersection point with the reference power point, a reference power point specifying step for calculating a reference flow rate or a reference shaft power of the pump when operating at a reference rotational speed, and an arithmetic processing unit based on the input characteristic value. A characteristic value calculating step for calculating a desired unknown characteristic value as an output characteristic value by sequentially calculating characteristic values at the reference operating point and the reference power point by the reference operating point specifying step and the reference power point specifying step; A measurement value inspection step for inspecting the measurement normality of the target measuring device by comparing the output characteristic value obtained in the characteristic value calculation step with the inspection characteristic value obtained in the data acquisition unit by the arithmetic processing unit. ing.

  According to the present invention, even when measuring equipment is inspected, the normal operation of the pump system is temporarily stopped, a calibrated sensor or measuring equipment is temporarily installed, and the measured value of the sensor or measuring equipment to be inspected Maintenance work of comparing or removing a sensor or measuring device to be inspected and calibrating is not required. For this reason, it is possible to inspect the measurement normality of the pump measuring device while continuing normal operation of the pump system and without generating a work load for inspection.

Next, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
First, with reference to FIG. 1, the pump measuring device inspection apparatus concerning the 1st Embodiment of this invention is demonstrated. FIG. 1 is a block diagram showing a configuration of a pump measuring device inspection apparatus according to the first embodiment of the present invention.

  The pump measuring device inspection apparatus 1 is composed of an information arithmetic processing apparatus that performs arithmetic processing using a computer such as a workstation or a personal computer as a whole, and the rotational speed of the pump system 5 is variably controlled at an arbitrary control rotational speed. Among the plurality of characteristic values indicating the operation status of the pump, an unknown characteristic value is calculated as an output characteristic value 2C from the input known input characteristic value 2A, and the inputted known inspection characteristic value 2B By comparing, it has the function to test | inspect the measurement normality of object measuring device.

  The pump measuring device inspection apparatus 1 includes a data acquisition unit 11, an operation input unit 12, a screen display unit 13, a data output unit 14, a storage unit 15, and an arithmetic processing unit 16 as main functional units. . The arithmetic processing unit 16 is provided with a reference operating point specifying unit 16A, a reference power point specifying unit 16B, a characteristic value calculating unit 16C, and a measured value inspecting unit 16D as processing units for performing pump measuring device inspection processing. Yes.

  In the present embodiment, the arithmetic processing unit 16 has a resistance curve indicating the relationship between the pump flow rate and the head when the pump rotational speed is controlled based on an arbitrary characteristic value while the pump piping resistance is constant. A reference operating point specifying unit 16A that calculates a reference flow rate or a reference lift of the pump when operating at a reference rotational speed by specifying a reference operating point consisting of an intersection with the reference head curve of the storage unit 15, and an arbitrary characteristic Based on the intersection of the control time axis power curve indicating the relationship between the pump flow rate and shaft power when the pump rotational speed is controlled with the pump piping resistance being constant based on the value and the reference shaft power curve of the storage unit A reference power point specifying unit 16B for calculating a reference flow rate or a reference shaft power of the pump when operating at a reference rotational speed by specifying a reference power point, and a characteristic value calculating unit 16C of the arithmetic processing unit 16 Based on the input characteristic value 2A, the reference operating point specifying unit 16A and the reference operating point specifying unit 16A sequentially calculate the characteristic values at the reference operating point and the reference power point, thereby obtaining the desired unknown characteristic value as the output characteristic value 2C. In the measurement value inspection unit 16D, the measurement normality of the target measurement device is compared by comparing the output characteristic value 2C obtained by the characteristic value calculation unit 16C with the inspection characteristic value 2B obtained by the data acquisition unit 11. Inspect.

[Pump system]
Next, with reference to FIG. 2, a pump system to be processed by the pump measuring device inspection apparatus according to the first embodiment of the present invention will be described. FIG. 2 is a block diagram illustrating a configuration example of a pump system in which a pump measuring device to be inspected by the pump measuring device inspection apparatus is installed.
The pump system 5 is a pump system for general air conditioning equipment provided in office buildings, public facilities, hotels, etc., has two heat sources, has a primary pump as a heat source machine, and is used as a forward header. Secondary pumps are provided, and inverters are provided in these pumps to variably control the pump rotation speed. Note that the present invention is not limited to a pump system having two heat sources, and can be similarly applied to a pump system having one system or three or more heat sources, and similar operational effects can be obtained.

  The pump system 5 includes, as main devices, a control device 50A, a secondary pump control device 50B, heat source devices 51A and 51B, primary pumps 52A and 52B, forward headers 53A and 53B, and secondary pumps 54A, 54B and 54C. A differential pressure gauge 55, a valve 56, a forward water temperature sensor 57A, a return water temperature sensor 57B, a flow meter 58, and a return header 59 are provided.

The return header 59 and the forward header 53A are connected by two parallel heat source pipes 61, 62. The heat source pipes 61, 62 are connected to the heat source machine 51A, the primary pump 52A, the heat source machine 51B, and Primary pumps 52B are arranged in series, respectively. The bypass pipeline 60 is a pipeline connecting the return header 59 and the forward header 53A with a bypass pathway.
The heat source water returned from the external load 65 is distributed to the heat source pipes 61 and 62 by the return header 59 and adjusted to an appropriate temperature by the heat source devices 51A and 51B according to the control from the control device 50A, and then the primary pump. By 52A and 52B, the liquid is sent to the forward header 53A at a flow rate corresponding to the inverter control from the control device 50A.

Secondary pumps 54A, 54B, 54C, differential pressure gauge 55, and valve 56 are connected in parallel between forward headers 53A, 53B.
The heat source water sent from the primary pumps 52A and 52B through the forward header 53A is passed through the forward header 53B by the secondary pumps 54A, 54B and 54C at a flow rate corresponding to the inverter control from the secondary pump control device 50B. To the external load 65 side. The pressure difference between the forward headers 53A and 53B, that is, the head H is measured by the differential pressure gauge 55 and output to the secondary pump control device 50B.

  The external load 65 includes a heat exchanger such as an air conditioner and a valve that adjusts the amount of heat source water supplied to the heat exchanger, and serves as a pipe resistance for the secondary pumps 54A, 54B, and 54C. The heat source water sent from the forward header 53B is supplied to the external load 65 via the forward water pipe 63, and after heat exchange with the external load 65, returns to the return header 59 via the return water pipe 64. The outgoing water pipe 63 is provided with an outgoing water temperature sensor 57A, and the temperature of the heat source water supplied to the external load 65, that is, the temperature of the outgoing water is measured and output to the control device 50A. A return water temperature sensor 57B is provided in the return water pipe 64, and the temperature of the heat source water returning from the external load 65, that is, the return water is measured and output to the control device 50A. The return water pipe 64 is provided with a flow meter 58, and the flow rate Q of the heat source water circulating through the external load 65 is measured and output to the control device 50A and the secondary pump control device 50B.

The control device 50A determines the amount of load heat at the external load 65 based on the water temperature measured by the water temperature sensor 57A, the return water temperature measured by the return water temperature sensor 57B, and the flow rate Q measured by the flow meter 58. Calculate and adjust the number of operating heat source devices 51A and 51B based on this load heat quantity. Further, the control device 50A controls each of the primary pumps 52A and 52B so that the flow rate Q is maintained by controlling the rotational speeds of the primary pumps 52A and 52B, respectively, when the number of operating heat source devices 51A and 51B is changed. Adjust the flow rate.
The secondary pump control device 50B adjusts the number of operating secondary pumps 54A, 54B, 54C based on the flow rate Q measured by the flow meter 58. Further, the rotational speed of the secondary pumps 54A, 54B, 54C is controlled to control the flow rate and the head, and the opening degree of the valve 56 is adjusted in order to return the excess heat source water in the forward header 53B to the forward header 53A. To do.

[Principle of calculation of pump characteristic value]
Next, with reference to FIG. 3 and FIG. 4, the principle of the pump characteristic value calculation in the pump measuring device inspection apparatus according to the first embodiment of the present invention will be described. FIG. 3 is an explanatory diagram illustrating the principle of calculating the pump characteristic value, where the horizontal axis indicates the flow rate Q, the left vertical axis indicates the head H, and the right vertical axis indicates the shaft power. FIG. 4 is a schematic flowchart showing a process of calculating the pump characteristic value.

[Relationship between flow rate and head]
First, the relationship between the flow rate and the head when the rotation speed of the pump is controlled by an inverter will be described.
When the rotation speed N of the pump is controlled from the rated rotation speed N ₀ to the rotation speed N ₁ during control by inverter control, the discharge amount from the pump, that is, the flow rate Q, and the discharge pressure, that is, the lift H, can be expressed as The relationship shown in is established. In the formula (1), INV is the ratio N ₁ / N ₀ of the control when the rotational speed N ₁ to the rated rotational speed N _0, that is, the rotational speed ratio, K _1, K ₂ are constants.
H = K ₁ × INV ² −K ₂ × Q ² (1)

The operation characteristic indicating the relationship between the flow rate and the head represented by the equation (1) is referred to as a head curve. As can be seen from the equation (1), the lift curve moves in parallel in the direction along the left vertical axis in FIG. 3 according to the change in the rotational speed ratio INV. Here, the lift curve at the rated rotation speed N _0, that is, the rotation speed ratio INV = 1 (N ₀ / N ₀ = 100%) is referred to as the reference lift curve A _0, and the control rotation speed N _1, that is, the rotation speed ratio INV <1. The lift curve at (N ₁ / N ₀ ) is referred to as a control lift curve A ₁ .

Further, as can be seen from the equation (1), the head curve can be expressed by a quadratic function of the flow rate Q, and can be approximated by a function equation such as the following equation (2) when s, t, and u are constants. .
H = −s × Q ² + t × Q + u (2)
In general, the reference lift curve A ₀ of the pump is a characteristic unique to the pump, and a reference lift curve such as Expression (2) is provided from the manufacturer by a graph or a functional expression for each product.

On the other hand, when the pump rotational speed N is inverter-controlled while the pump load resistance is constant, the head H has an operating characteristic proportional to the square of the flow rate Q. Here, when α is a constant, it can be approximated by a function expression such as the following expression (3), and the operation characteristic indicating the flow rate-lift relationship represented by expression (3) is referred to as a resistance curve C.
H = α × Q ² (3)

Accordingly, the operating point R determined by the flow rate Q of the pump and its head H moves on the same resistance curve C in accordance with the change in the rotational speed ratio INV. Here, the operating point at the rated rotational speed N _0, that is, the rotational speed ratio INV = 1 (N ₀ / N ₀ = 100% = reference rotational speed ratio INV ₀ ) is referred to as the reference operating point R _0, and the control rotational speed N ₁ That is, the operating point at the rotational speed ratio INV <1 (N ₁ / N ₀ ) is referred to as a control operating point R ₁ . Further, the flow rate and the lift at the reference operating point R ₀ are referred to as a reference flow rate Q ₀ and a reference lift H ₀ , respectively, and the flow rate and the lift at the control operation point R ₁ are referred to as a control flow rate Q ₁ and a control lift H ₁ , respectively.

From this, if the control operating point R ₁ at the time of inverter control, that is, the control flow rate Q ₁ and the control lift H ₁ are known, the constant α of the equation (3) is calculated backward to obtain the equation (3), that is, the resistance The curve C can be specified. If the reference lift curve A ₀ provided in advance is stored as the equation (2), the intersection of the reference lift curve A ₀ and the resistance curve C can be expressed by the simultaneous equations of the equations (2) and (3). It can be specified as a solution. Accordingly, it is possible to obtain the reference operating point R ₀ for the control operating point R ₁ in a state where the load resistance is constant, and conversely, to obtain the control operating point R ₁ from the reference operating point R _0. I understand.

In addition, when the inverter is controlled with a constant load resistance and the rotational speed ratio is changed from INV ₀ to INV ₁ , the pump operating state moves from the reference operating point R ₀ to the control operating point R ₁ , and the reference lift Curve A ₀ translates to control lift curve A ₁ . At this time, since the lift H is proportional to the square of the rotational speed ratio INV from the equation (1), the ratio between the reference lift H ₀ and the control lift H ₁ is the reference rotational speed ratio INV ₀ ² (= 1). and proportional to the ratio of control during rotation velocity ratio INV ₁ ^2. Therefore, the control lift H ₁ can be obtained from the reference lift H ₀ and the control rotation speed ratio INV ₁ based on the following equation (5).
H ₁ = H ₀ × INV ₁ ² (5)

Similarly, since the flow rate Q is proportional to the rotational speed ratio INV from the equation (1), the ratio between the reference flow rate Q ₀ and the control flow rate Q ₁ is the reference rotational speed ratio INV ₀ (= 1) and the control rotational speed. It is proportional to the ratio INV ₁ . Therefore, the control flow rate Q ₁ can be obtained from the reference flow rate Q ₀ and the control rotation speed ratio INV ₁ based on the following equation (6), and conversely from the control flow rate Q ₁ and the control rotation speed ratio INV _1. A reference flow rate Q ₀ can also be obtained.
Q ₁ = Q ₀ × INV ₁ (6)

Further, Equation (5) using, can also determine the reference lift H ₀ control during lift H ₁ from the control when the rotational speed ratio INV _1, a reference lift H ₀ and the control when the rotational speed ratio from the control when pump head H ₁ INV ₁ can also be obtained.
Similarly, the reference flow rate Q ₀ can be obtained from the control flow rate Q ₁ and the control rotation speed ratio INV ₁ using the equation (6), and the control rotation speed ratio from the reference flow rate Q ₀ and the control flow rate Q _1. INV ₁ can also be obtained.

[Relationship between flow rate and shaft power]
Next, the relationship between the flow rate and shaft power when the rotation speed of the pump is controlled by an inverter will be described.
In general, the discharge amount from the pump operating at the rated rotational speed N ₀ , that is, the flow rate Q and the power consumption of the pump, that is, the shaft power E, are represented by a reference shaft power curve B ₀ in FIG. Such a reference shaft power curve B ₀ of the pump is a characteristic unique to the pump, and is provided from the manufacturer by a graph or a function formula for each individual product. The shaft power E can be expressed by a quadratic function of the flow rate Q. When a, b, and c are constants, the shaft power E can be approximated by a functional expression such as the following expression (7).
E = −a × Q ² + b × Q + c (7)

On the other hand, when the rotational speed N of the pump is inverter-controlled while the load resistance of the pump is constant, the shaft power E has an operation characteristic proportional to the cube of the flow rate Q. Here, when β is a constant, it can be approximated by a function expression such as the following expression (7). Here, during inverter control in a state where the load resistance of the pump is constant, the operation characteristic indicating the relationship between the flow rate and the shaft power expressed by the equation (8) is referred to as a control time shaft power curve B ₁ .
E = β × Q ³ (8)

Therefore, the power point P determined by the flow rate Q of the pump and its shaft power E moves on the same control time shaft power curve B ₁ according to the change of the rotational speed ratio INV. Here, the operating point at the rated rotational speed N _0, that is, the rotational speed ratio INV = 1 (N ₀ / N ₀ = 100%) is referred to as the reference power point P _0, and the control rotational speed N _1, that is, the rotational speed ratio INV <1. The power point at (N ₁ / N ₀ ) is referred to as a control power point P ₁ . The shaft power at the reference power point P ₀ is referred to as reference shaft power E _0, and the shaft power at the control power point P ₁ is referred to as control time shaft power E ₁ .

From this, if the control power point P ₁ at the time of inverter control, that is, the control flow rate Q ₁ and the control shaft power E ₁ are known, the constant β of the equation (8) is calculated backward to obtain the equation (8), The control time axis power curve B ₁ can be specified. Further, if the reference shaft power curve B ₀ provided in advance is stored as the equation (7), the intersection of the reference shaft power curve B ₀ and the control time shaft power curve B ₁ is expressed by the equations (7) and ( It can be specified as the solution of simultaneous equations in 8). Therefore, in a state where the load resistance is constant, the reference power point P ₀ for the control power point P ₁ can be obtained, and conversely, the control power point P ₁ can be obtained from the reference power point P _0. I understand.

Further, when the rotation speed ratio is changed from INV ₀ to INV ₁ by performing inverter control with a constant load resistance, the operation state of the pump moves from the reference power point P ₀ to the control power point P ₁ . In this case, the shaft power E from Equation (8) is proportional to the cube of the flow rate Q, since the flow rate Q is proportional to the rotational speed ratio INV from equation (6), the reference axis power E ₀ and the control when the shaft power E ₁ ratio is proportional to the reference rotational speed ratio INV ₀ 2 (= 1) and the control when the ratio of the rotational speed ratio INV ₁ ^3.

Therefore, the control-time shaft power E ₁ can be obtained from the reference shaft power E ₀ and the control-time rotation speed ratio INV ₁ based on the following equation (9).
E ₁ = E ₀ × INV ₁ ³ (9)
Further, using Equation (9), the control when the shaft power E ₁ and can also determine the reference axis power E ₀ from the control when the rotational speed ratio INV _1, the control from the control when the shaft power E ₁ the reference axis power E ₀ The hourly rotation speed ratio INV ₁ can also be obtained.

[Pump characteristic value calculation process]
As described in the principle of the pump measuring device inspection shown in FIG. 3, if the control operating point R ₁ or the reference operating point R ₀ is specified, the resistance curve C corresponding to the load resistance related to the pump at that time is specified. can do. Thereby, when the control operation point R ₁ is known, the reference operation point R ₀ corresponding to the control operation point R ₁ can be specified based on the resistance curve C in a state where the load resistance is constant.
If any one of the reference operating point R ₀ , the control flow rate Q ₁ , the control lift H ₁ , and the control rotation speed ratio INV ₁ is known, the known characteristic value and the resistance curve C Based on the above, the control operation point R ₁ corresponding to the reference operation point R ₀ can be specified in a state where the load resistance is constant.

If the control power point P ₁ or the reference power point P ₀ is specified, the control time axis power curve B ₁ corresponding to the load resistance of the pump at that time can be specified. Thus, when the control power point P ₁ is known, the reference power point P ₀ corresponding to the control power point P ₁ can be specified based on the control time power curve B ₁ when the load resistance is constant. .
If any one of the reference power point P ₀ , the control flow rate Q ₁ , the control time shaft power E ₁ , and the control rotation speed ratio INV ₁ is known, this known characteristic value and the control time shaft Based on the power curve B ₁ , the control power point P ₁ corresponding to the reference power point P ₀ can be specified when the load resistance is constant.

At this time, as shown in FIG. 3, the reference flow rate Q ₀ at the reference operating point R ₀ and the reference power point P ₀ is the same, control when the flow rate Q ₁ at the control during operation point R ₁ and the control during power point P ₁ Are the same. For this reason, when the control operation point R ₁ is known, the resistance curve C → the reference operation point R ₀ → the reference flow rate Q ₀ → the reference power point P ₀ → the control time axis power curve B ₁ is specified in order, The control power point P ₁ can be specified.
Therefore, the control during the flow rate Q ₁ that identifies the control during operation point R _1, the control during lift H _1, in the case of known either as two of the input characteristic value 2A of the control when the rotational speed ratio INV _1, the control during power point An unknown control time axis power E ₁ at P ₁ can be obtained.

On the other hand, when the control power point P ₁ is known, the control time power curve B ₁ → the reference power point P ₀ → the reference flow rate Q ₀ → the reference operating point R ₀ → the resistance curve C in this order. By specifying, the control operating point R ₁ can be specified.
Therefore, the control during shaft power E ₁ which identifies the control during power point P _1, 2 one characteristic values consisting of and either control when the flow rate Q ₁ or control when the rotational speed ratio INV ₁ are known, the input characteristic value 2A Can be obtained as an unknown control head H ₁ at the control operating point R ₁ .

[Configuration of pump measuring device inspection device]
Next, with reference to FIG. 1, the structure of the pump measuring device test | inspection apparatus concerning the 1st Embodiment of this invention is demonstrated.
The data acquisition unit 11 includes a dedicated data communication circuit, and performs data communication with an external device such as each device of the pump system 5 to perform various information such as an input characteristic value 2A and a program related to a pump that is a characteristic value calculation target. It has the function to acquire. As the input characteristic value 2A, at least any two of the flow rate Q, the head H, the shaft power E, and the rotational speed ratio INV related to the pump that is a characteristic value calculation target is acquired.

At this time, in the pump system of FIG. 2, for example, the flow rate value (discharge amount) measured by the flow meter 58 is acquired as the flow rate Q, the differential pressure measured by the differential pressure meter 55 is acquired as the head H, and the secondary pump The power consumption measured by the wattmeters (not shown) of 54A, 54B, and 54C may be acquired as the shaft power, and the control rotation speed ratio INV ₁ measured by the secondary pumps 54A, 54B, and 54C may be acquired. . When the rotation speed can be obtained from the secondary pumps 54A, 54B, 54C and the secondary pump control device 50B, the calculation processing unit 16 may convert the rotation speed into a rotation speed ratio at the time of data acquisition.

The operation input unit 12 includes an operation input device such as a keyboard and a mouse, and has a function of detecting various operations such as start of a pump measuring device inspection process by an operator and outputting the operation to the arithmetic processing unit 16.
The screen marking unit 13 includes a screen display device such as an LCD or a PDP, and has a function of displaying various information such as an operation menu screen and a test result 3 of the measuring device on the screen in accordance with an output from the arithmetic processing unit 16. ing.
The data output unit 14 includes a dedicated data communication circuit, and has a function of outputting the test result 3 obtained by the arithmetic processing unit 16 by performing data communication with an external device such as each device of the pump system 5. ing.

The storage unit 15 includes a storage device such as a memory or a hard disk, and has a function of storing various processing information and a program 15P used for the pump measuring device inspection process in the arithmetic processing unit 16. Among them, the program 15P is a program that is read and executed by the arithmetic processing unit 16 and implements various processing units that perform pump measuring device inspection processing. The storage unit is previously stored in the storage unit via the data acquisition unit 11 from an external device or a recording medium. 15 is stored.
Main processing information stored in the storage unit 15 includes a reference lift curve function equation 15A, a reference shaft power curve function equation 15B, a function shape equation 15C, and a measurement error range 15D.

The reference lift curve function formula 15A is a function expression showing the relationship between the pump flow rate Q and the lift H at the rated rotational speed N ₀ (rotational speed ratio = INV ₀ ), that is, the reference lift curve.
The reference shaft power curve function expression 15B is a function expression showing the relationship between the pump flow rate Q and the shaft power E at the rated rotational speed N ₀ (rotational speed ratio = INV ₀ ), that is, the reference shaft power curve.

The reference lift curve function formula 15A and the reference shaft power curve function formula 15B are function formulas in which all constants are fixed, and function formulas attached in advance as technical data to the pump may be used as drawings and data. In the case of attachment, a function formula may be calculated in advance from these drawings and data.
On the other hand, the function shape formula 15C is various function formulas indicating the operating characteristics of the pump, such as a resistance curve and a control time axis power curve. These function expressions are expressions that indicate only the shape of a function such as a quadratic function or a cubic function without constants being determined.
The measurement error range 15D is information indicating a range of allowable error with respect to the measurement value of the target measurement device to be inspected.

The arithmetic processing unit 16 includes a microprocessor such as a CPU and its peripheral circuits, and reads and executes the program 15P in the storage unit 15 to cause the hardware and the program 15P to cooperate with each other to perform pump measurement device inspection. It has a function of realizing various processing units necessary for processing.
As main processing units realized by the arithmetic processing unit 16, there are a reference operating point specifying unit 16A, a reference power point specifying unit 16B, a characteristic value calculating unit 16C, and a measured value inspecting unit 16D.

The reference operating point specifying unit 16A is based on an arbitrary characteristic value, a resistance curve indicating the relationship between the pump flow rate and the head when the pump rotation speed is controlled in a state where the pump piping resistance is constant, and the storage unit 15 It has a function of calculating a reference flow rate or a reference lift of the pump when operating at a reference rotational speed by specifying a reference operating point that is an intersection with the reference lift curve.
The reference power point specifying unit 16B has a control time axis power curve indicating the relationship between the pump flow rate and the shaft power when the pump rotation speed is controlled in a state where the pump piping resistance is constant based on an arbitrary characteristic value. By specifying a reference power point that is an intersection with the reference shaft power curve in the storage unit 15, the pump has a function of calculating the reference flow rate or reference shaft power of the pump when operating at the reference rotation speed.

Based on the input characteristic value 2A acquired by the data acquisition unit 11, the characteristic value calculation unit 16C performs the characteristics at the reference operating point R ₀ and the reference power point P ₀ by the reference operating point specifying unit 16A and the reference operating point specifying unit 16A. A function for sequentially calculating values, a function for calculating a desired unknown characteristic value based on these characteristic values as an output characteristic value 2C, and displaying the calculated output characteristic value 2C on the screen display unit 13 or a data output unit 14 to output to an external device such as the pump system 5.

  The measurement value inspection unit 16D has a function of inspecting the measurement value of the target measurement device by comparing the output characteristic value 2C obtained by the characteristic value calculation unit 16C with the inspection characteristic value 2B obtained by the data acquisition unit 11. Have. Specifically, the function for calculating the measurement error based on the difference between the output characteristic value 2C and the inspection characteristic value 2B is compared with the measurement error range 15D of the storage unit 15 to obtain the inspection characteristic value 2B. Has a function of inspecting whether or not the measurement value of the target measuring device is abnormal, that is, measurement normality, and outputting the inspection result 3 based on whether or not the output characteristic value 2C is within the measurement error range. .

[Operation of First Embodiment]
Next, operation | movement of the pump measuring device test | inspection apparatus concerning the 1st Embodiment of this invention is demonstrated.
The pump measuring device inspection device 1 uses a known input characteristic input from among a plurality of characteristic values indicating the operation status of the pump for a pump whose rotational speed is variably controlled at an arbitrary control rotational speed in the pump system 5. An unknown characteristic value is calculated as the output characteristic value 2C from the value 2A. At this time, whether the control time axis power E ₁ is the output characteristic value 2C or the input characteristic value 2A, that is, the control time axis power E ₁ is calculated from other characteristic values or other characteristic values are calculated from the control time axis power E _1. The pump measuring device inspection process can be roughly divided according to whether or not.

[When the control shaft power is an output characteristic value]
First, with reference to FIGS. 5 to 8, the pump measuring device inspection process when the control-time shaft power is an output characteristic value will be described. FIG. 5 is a flowchart showing a pump measurement device inspection process (when the control time shaft power is an output characteristic value) of the pump measurement device inspection apparatus according to the first embodiment of the present invention. FIG. 6 is a flowchart showing a pump measurement device inspection process (when the control time shaft power is an output characteristic value) of the pump measurement device inspection apparatus according to the first embodiment of the present invention. FIG. 7 is a flowchart showing a reference operating point specifying process in the pump measuring device inspection process of FIG. FIG. 8 is a flowchart showing a reference power point specifying process in the pump measuring device inspection process of FIG.

The arithmetic processing unit 16 of the pump measuring device inspection apparatus 1 causes the characteristic value calculating unit 16C to perform the operation according to the start instruction operation of the pump measuring device inspection processing detected by the operation input unit 12 or the arrival of the automatic execution trigger. 5 and the pump measuring device inspection process of FIG. 6 is started.
When the control shaft power is the output characteristic value 2C, any two of the control flow rate Q ₁ , control lift H ₁ , and control rotation speed ratio INV ₁ at the control operation point R ₁ in FIG. 3 are input. The characteristic value is 2A. Here, a case will be described as an example in which a power meter that measures the shaft power of the pump is inspected based on the control-time shaft power E ₁ calculated from the control-time flow rate Q ₁ and the control-time head H ₁ as the output characteristic value 2C. .

Characteristic value calculating unit 16C, at first, from the pump system 5 via the data acquisition unit 11 acquires the control during shaft power E _S control during power point P _1, temporarily stored in the storage unit 15 as the inspection characteristic value 2B (step 100), acquires the control at flow rates Q ₁ and control during lift H ₁ showing the control when the operating point R _1, temporarily stored in the storage unit 15 as an input characteristic value 2A (step 101).
Next, the characteristic value calculation unit 16C performs a reference operation point specification process of FIG. 7 described later by the reference operation point specification unit 16A to calculate a reference flow rate Q ₀ (step 102).
Subsequently, the characteristic value calculation unit 16C performs a reference power point specifying process of FIG. 8 described later by the reference power point specifying unit 16B to calculate a reference shaft power E ₀ (step 103).

Thereafter, the characteristic value calculation unit 16C reads the reference flow rate Q ₀ calculated by the reference operating point specifying unit 16A and the reference shaft power E ₀ calculated by the reference power point specifying unit 16B from the storage unit 15 ( Step 104), the above-described equation (9) is read out from the function shape equation 15C of the storage unit 15 as the function shape equation of the control time axis power curve B ₁ (step 105), and a constant is obtained from the reference flow rate Q ₀ and the reference shaft power E _0. β is calculated (step 106). Thus, the control time axis power curve B ₁ is specified.

Then, the characteristic value calculating unit 16C reads out the control time flow rate to Q ₁ control when the operating point R ₁ from the storage unit 15 (step 107), controlled from the control when the flow rate Q ₁ and the control when the shaft power curve B ₁ Metropolitan The time axis power E ₁ is calculated (step 108). Thus, control upon power point P ₁ on the control when the shaft power curve B ₁ is identified and temporarily stored in the storage unit 15 the control when the shaft power E ₁ as an output characteristic value 2C (step 109).

Thereafter, the measured value inspection unit 16D controls the control time axis power E ₁ calculated from the control flow rate Q ₁ and the control lift H ₁ as the output characteristic value 2C, and the control time axis power measured and input as the inspection characteristic value 2B. By calculating the measurement error ε based on the difference from E _S (step 110), reading the measurement error range related to the wattmeter to be inspected from the measurement error range 15D of the storage unit 15, and comparing it with the measurement error ε, Based on whether or not the output characteristic value 2C is within the measurement error range of the inspection characteristic value 2B, the presence or absence of the measurement value of the target measuring device, that is, measurement normality is inspected, and the inspection result 3 is output (step 111). ), A series of pump measuring device inspection processing is completed.

[Standard operation point identification process]
The reference operating point specifying unit 16A starts the reference operating point specifying process of FIG. 7 in response to an instruction from the characteristic value calculating unit 16C.
First, the reference operating point specifying unit 16A reads the control at flow rates Q ₁ and control during lift H ₁ showing the control when the operating point R ₁ from the storage unit 15 (step 120), the function-shaped type 15C in the storage unit 15 The above-described equation (3) is read as a function shape equation of the resistance curve C (step 121), and a constant α is calculated from the control flow rate Q ₁ and the control lift H ₁ (step 122). Thereby, the resistance curve C is specified.

Subsequently, the reference operating point specifying unit 16A reads the reference lift curve function formula 15A in which the constant of the above-described formula (2) is fixed as the reference lift curve A ₀ from the storage unit 15 (step 123). By solving the lift curve A ₀ and the resistance curve C as simultaneous equations, the intersection of the reference lift curve A ₀ and the resistance curve C, that is, the reference operating point R ₀ is specified, and the reference flow rate Q ₀ is calculated (step) 124). Then, the obtained reference flow rate Q ₀ is temporarily stored in the storage unit 15 (step 125), and the series of reference operating point specifying processes is terminated.

[Reference power point identification processing]
The reference power point specifying unit 16B starts the reference power point specifying process of FIG. 8 in response to an instruction from the characteristic value calculating unit 16C.
First, the reference power point specifying unit 16B reads the reference flow rate Q ₀ from the storage unit 15 (step 130), and the reference in which the constant of the formula (7) is determined as the reference shaft power curve B ₀ from the storage unit 15 is established. The shaft power curve function formula 15B is read (step 131).
Subsequently, the reference power point specifying unit 16B calculates the reference shaft power E ₀ from the reference flow rate Q ₀ and the reference shaft power curve B ₀ (step 132). Thus, the intersection of the reference shaft power curve B ₀ and the control time shaft power curve B ₁ , that is, the reference power point P ₀ is specified, and this reference shaft power E ₀ is temporarily stored in the storage unit 15 (step 133). A series of reference power point specifying processes are terminated.

[When the control time shaft power is included in the input characteristic value]
First, with reference to FIGS. 9 to 12, a pump measuring device inspection process in the case where the control time shaft power is included in the input characteristic value will be described. FIG. 9 is a flowchart showing pump measurement device inspection processing (when control-time shaft power is included in the input characteristic value) of the pump measurement device inspection device according to the first embodiment of the present invention. FIG. 10 is a flowchart showing a pump measurement device inspection process (when control time axis power is included in the input characteristic value) of the pump measurement device inspection apparatus according to the first embodiment of the present invention. FIG. 11 is a flowchart showing a reference operating point specifying process in the pump measuring device inspection process of FIG. FIG. 12 is a flowchart showing a reference power point specifying process in the pump measuring device inspection process of FIG.

The arithmetic processing unit 16 of the pump measuring device inspection apparatus 1 causes the characteristic value calculating unit 16C to perform the operation according to the start instruction operation of the pump measuring device inspection processing detected by the operation input unit 12 or the arrival of the automatic execution trigger. 9 and the pump measuring device inspection process of FIG. 10 is started.
When the control shaft power is included in the input characteristic value 2A, any _one of the control flow rate Q ₁ , the control lift H ₁ , and the control rotation speed ratio INV ₁ at the control operation point R ₁ in FIG. This is the input characteristic value 2A. Here, a case where a pressure gauge that measures the pump head based on the control head H ₁ calculated from the control flow rate Q ₁ and the control shaft power E ₁ from the input characteristic value 2A will be described as an example.

The characteristic value calculation unit 16C first acquires the control head H _S of the control operating point R ₁ from the pump system 5 via the data acquisition unit 11, temporarily stores it as the inspection characteristic value 2B in the storage unit 15. (step 150), acquires the control at flow rates Q ₁ and control during shaft power E ₁ showing the control when the operating point R _1, temporarily stored in the storage unit 15 (step 151).
Subsequently, the characteristic value calculation unit 16C performs a reference power point specifying process of FIG. 11 described later by the reference power point specifying unit 16B to calculate a reference flow rate Q ₀ (step 152).
Next, the characteristic value calculation unit 16C performs a reference operation point specification process of FIG. 12 described later by the reference operation point specification unit 16A, and calculates a reference head H ₀ (step 153).

Thereafter, the characteristic value calculation unit 16C reads the reference flow rate Q ₀ calculated by the reference power point specifying unit 16B and the reference head H ₀ calculated by the reference operating point specifying unit 16A from the storage unit 15 (step S1). 154), the above-described equation (3) is read out from the function shape equation 15C of the storage unit 15 as the function shape equation of the resistance curve C (step 155), and the constant α is calculated from the reference flow rate Q ₀ and the reference head H ₀ (step 155). 156). Thereby, the resistance curve C is specified.

Subsequently, the characteristic value calculation unit 16C reads the control flow rate Q ₁ at the control operation point R ₁ from the storage unit 15 (step 157), and the control lift H ₁ from the control flow rate Q ₁ and the resistance curve C. Is calculated (step 158). Thus, control upon lifting height H ₁ of the control during head curve A ₁ is calculated, and temporarily stores the control time lift H ₁ to the memory unit 15 (step 159).

Thereafter, the measured value inspection unit 16D controls the control lift H ₁ calculated from the control flow rate Q ₁ and the control shaft power E ₁ as the output characteristic value 2C, and the control lift H measured and input as the inspection characteristic value 2B. _A measurement error ε is calculated based on the difference of _S (step 160), and a measurement error range related to the pressure gauge to be inspected is read from the measurement error range 15D of the storage unit 15 and compared with the measurement error ε, thereby inspecting characteristics. Based on whether or not the value 2B is within the measurement error range of the output characteristic value 2C, the presence or absence of the measurement value of the target measurement device, that is, the measurement normality is inspected, and the inspection result 3 is output (step 161). A series of pump measuring device inspection processes are completed.

[Reference power point identification processing]
The reference power point specifying unit 16B starts the reference power point specifying process of FIG. 11 in response to an instruction from the characteristic value calculating unit 16C.
First, the reference power point specifying unit 16B reads out the control flow rate Q ₁ and the control time shaft power E ₁ indicating the control power point P ₁ from the storage unit 15 (step 170), and the function shape formula 15C of the storage unit 15 (8) is read out as a function shape formula of the control time axis power curve B ₁ from (Step 171), and a constant β is calculated from the control flow rate Q ₁ and the control lift H ₁ (Step 172). Thus, the control time axis power curve B ₁ is specified.

Next, the reference power point specifying unit 16B reads the reference shaft power curve function formula 15B in which the constant of the equation (7) is fixed as the reference shaft power curve B ₀ from the storage unit 15 (step 173), for example, control By solving the time axis power curve B ₁ and the reference axis power curve B ₀ as simultaneous equations, the reference flow rate Q ₀ and the reference axis power E _{0 at} the intersection of the control time axis power curve B ₁ and the reference axis power curve B ₀ are obtained. Is calculated (step 174), the reference flow rate Q ₀ and the reference shaft power E ₀ are temporarily stored in the storage unit 15 as the reference power point P ₀ (step 175), and the series of reference power point specifying processes is terminated.

[Standard operation point identification process]
The reference operating point specifying unit 16A starts the reference operating point specifying process of FIG. 12 in response to an instruction from the characteristic value calculating unit 16C.
First, the reference operating point specifying unit 16A reads the reference flow rate Q ₀ of the reference power point P ₀ from the storage unit 15 (step 180), and the reference lift curve A ₀ from the storage unit 15 as the reference lift curve A ₀ as described above. A reference lift curve function formula 15A with a fixed constant is read (step 181). Then, to calculate the reference flow rate Q ₀ and the reference lift H ₀ from the reference head curve A ₀ Metropolitan (step 182), the temporary to the storage unit 15 together with the reference flow rate Q ₀ of the reference lift H ₀ obtained as reference operating point R ₀ Save (step 183), and end the series of reference operating point identification processing.

[Effect of the first embodiment]
As described above, the present embodiment allows the arithmetic processing unit 16 to determine the relationship between the pump flow rate and the head when the pump rotation speed is controlled in a state where the pump piping resistance is constant based on an arbitrary characteristic value. By specifying a reference operating point R ₀ consisting of the intersection of the resistance curve C shown and the reference lift curve A ₀ of the storage unit 15, the reference flow rate Q ₀ or the reference lift H ₀ of the pump when operating at the reference rotation speed is obtained. Based on the calculated reference operating point specifying unit 16A and an arbitrary characteristic value, the control time axis power indicating the relationship between the pump flow rate and the shaft power when the pump rotational speed is controlled with the pump piping resistance being constant. By specifying a reference power point P ₀ consisting of the intersection of the curve B ₁ and the reference shaft power curve B ₀ of the storage unit 15, the reference flow rate Q ₀ of the pump or the reference shaft power when operating at the rated rotational speed N ₀ is specified. reference power point specifying unit 16 to calculate the E ₀ It is provided with a door.

Then, in the characteristic value calculation unit 16C of the arithmetic processing unit 16, based on the input characteristic value 2A, the characteristic values at the reference operation point R ₀ and the reference power point P ₀ are obtained by the reference operation point specification unit 16A and the reference operation point specification unit 16A. By calculating sequentially, a desired unknown characteristic value is calculated as an output characteristic value 2C. In the measured value inspection unit 16D, the output characteristic value 2C obtained by the characteristic value calculation unit 16C and the data acquisition unit 11 are obtained. By comparing the inspection characteristic value 2B, the measurement value of the target measuring device is inspected.

Specifically, when the control-time shaft power E ₁ is the input characteristic value 2A, the data acquisition unit 11 causes the pump-related control flow rate Q ₁ , the control lift H ₁ , and the control rotation speed ratio INV ₁ to be selected. Any two are acquired as the input characteristic value 2A, and the reference operating point specifying unit 16A calculates the reference flow rate Q ₀ at the reference operating point R ₀ based on the input characteristic value 2A acquired by the data acquiring unit 11, The reference power point specifying unit 16B calculates the reference shaft power E ₀ at the reference power point P ₀ based on the reference flow rate Q ₀ , and the characteristic value calculating unit 16C calculates from the reference flow rate Q ₀ and the reference shaft power E _0. The control time axis power curve B ₁ is specified based on the reference power point P ₀ and the control time axis power curve function shape formula 15C, and the control time axis is determined from the control flow rate Q ₁ and the control time axis power curve B _1. Calculate power E ₁ as output characteristic value 2C Put out.

Further, when the control time shaft power E ₁ has the input characteristic value 2A, the data acquisition unit 11 acquires the control time flow rate Q ₁ and the control time shaft power E ₁ as the input characteristic value 2A, and specifies the reference power point. the section 16B, the reference flow rate Q ₀ of the reference power point P ₀ on the basis of the function-shaped type 15C of the control when the flow rate Q ₁ and the control time control during power point P ₁ consisting of shaft power E ₁ control during shaft power curve The reference operating point specifying unit 16A calculates the reference lift H ₀ at the reference operating point R ₀ based on the reference flow rate Q ₀ , and the characteristic value calculating unit 16C calculates the reference flow rate Q ₀ and the reference lift H _A resistance curve C is specified based on the reference operating point R ₀ consisting of ₀ and the function shape formula 15C of the resistance curve, and the control head H ₁ or the control rotation speed ratio is determined from the resistance curve C and the control flow rate Q _1. Calculate INV ₁ as output characteristic value 2C To do.

  As a result, the pump characteristic value measured by the target measuring device to be inspected is compared with the one calculated from the pump characteristic value measured by another normal measuring device, and the normality of the measured value of the target measuring device Is inspected. At this time, when the pump characteristic value is normally measured by the target measuring device to be inspected, the error from the one calculated from the other pump characteristic value is within a predetermined measurement error range. For this reason, when the pump characteristic value measured by the target measuring device falls outside the measurement error range, it can be determined that the pump characteristic value is not normally measured by the target measuring device.

  Therefore, according to the present embodiment, even when the measuring device is inspected, the normal operation of the pump system is temporarily stopped or the pump is experimentally operated so that the heat source water having an accurate flow rate and temperature is supplied on the load side. The maintenance work of confirming that the true value indicates a value within the measurement error range of the measurement value of the measurement device to be inspected is not necessary. For this reason, it is possible to inspect the measurement normality of the pump measuring device while continuing normal operation of the pump system and without generating a work load for inspection. Further, since the measuring device can be inspected remotely, it is not necessary for the operator to go to the installation site of the measuring device as in the prior art, and the maintenance cost can be reduced.

Further, in the present embodiment, the input characteristic value 2A was described the case of control at flow rates Q ₁ and control during lift H ₁ as an example, the input characteristic value 2A and control at flow Q ₁ control when the rotational speed ratio INV _In the case of ₁ , the control-time shaft power E ₁ can be calculated in the same manner as described above. In this case, when calculating the reference flow rate Q ₀ at the reference operating point R ₀ in step 102 of FIG. 6, the above-described equation (6) is calculated from the control flow rate Q ₁ and the control rotation speed ratio INV _{1 as} the input characteristic value 2A. Can be used to calculate the reference flow rate Q ₀ . In the pump measuring device inspection process in this case, the reference operating point R ₀ → reference flow rate Q ₀ → reference power point P ₀ → control time axis power curve B ₁ → control time power point P ₁ is not used without using the resistance curve C. It will be specified in order.

Similarly, when the input characteristic value 2A is the control lift H ₁ and the control rotation speed ratio INV ₁ , the input characteristic value 2A is calculated when calculating the reference flow rate Q ₀ at the reference operating point R ₀ in step 102 of FIG. The control lift H ₁ and the control rotation speed ratio INV ₁ are used to calculate the reference lift H ₀ using the above-described equation (6), and the reference lift H ₀ and the reference lift curve A ₀ of the storage unit 15 are used as the reference. The flow rate Q ₀ may be calculated. Even in the pump measuring device inspection process in this case, the reference operating point R ₀ → reference flow rate Q ₀ → reference power point P ₀ → control time axis power curve B ₁ → control time power point P ₁ is not used without using the resistance curve C. It will be specified in order.

In the present embodiment, the case where the control lift H ₁ is calculated using the control flow rate Q ₁ and the control time shaft power E ₁ as the input characteristic value 2A has been described as an example. However, the same input characteristic value 2A is used. the case of calculating the control when the rotational speed ratio INV ₁ with, it is possible to calculate the control time shaft power E ₁ in the same manner as described above. In this case, in step 158 of FIG. 10, the control rotation speed ratio INV ₁ may be calculated from the reference lift H ₀ and the control lift H ₁ using the above-described equation (5). In the pump measuring device inspection process in this case, the control time axis power curve B ₁ → the reference power point P ₀ → the reference flow rate Q ₀ → the reference operation point R ₀ → the resistance curve C → the control operation point R ₁ is specified in order. It will be.

[Second Embodiment]
Next, with reference to FIG. 13, a pump measuring device inspection apparatus according to a second embodiment of the present invention will be described. FIG. 13: is a flowchart which shows the pump measuring device test | inspection process of the pump measuring device test | inspection apparatus concerning the 2nd Embodiment of this invention.

In the first embodiment, when the control-time shaft power E ₁ is included in the input characteristic value 2A, the control-time flow rate Q ₁ is another input characteristic value 2A, the control-time head H ₁ or the control-time rotation speed ratio. The case where INV ₁ is calculated as the output characteristic value 2C and compared with the inspection characteristic value 2B has been described as an example. In the present embodiment, when the control-time shaft power E ₁ is included in the input characteristic value 2A, _one of the characteristic values of the control-time lift H ₁ or the control-time rotation speed ratio INV ₁ is the other input characteristic value 2A. The case where the other characteristic value is calculated as the output characteristic value 2C and compared with the inspection characteristic value 2B will be described.

Of the two input characteristic values 2A, a one of which controls when the shaft power E _1, if the other one is a one characteristic value any control during lift H ₁ or control when the rotational speed ratio INV _1, control-period Both the operating point R ₁ and the control power point P ₁ cannot be specified. For this reason, in the present embodiment, the characteristic value calculation unit 16C of the arithmetic processing unit 16 assumes a characteristic value of either the control lift H ₁ or the control rotation speed ratio INV ₁ that is the output characteristic value 2C. And a function of comparing the output characteristic value 2C calculated based on the assumed characteristic value with the original assumed characteristic value and outputting the assumed characteristic value as the output characteristic value 2C based on the comparison result. Other configurations of the pump measuring device inspection apparatus according to the present embodiment are the same as those in the first embodiment, and a detailed description thereof is omitted here.

[Operation of Second Embodiment]
Next, with reference to FIG. 13, the pump measuring device inspection process according to the second embodiment of the present invention will be described.
The arithmetic processing unit 16 of the pump measuring device inspection apparatus 1 causes the characteristic value calculating unit 16C to perform the operation according to the start instruction operation of the pump measuring device inspection processing detected by the operation input unit 12 or the arrival of the automatic execution trigger. 13 pump measuring device inspection process is started.

When the control-time shaft power E ₁ is included in the input characteristic value 2A, any _one of the control-time flow rate Q ₁ , the control-time head H ₁ , and the control-time rotation speed ratio INV ₁ at the control-time operating point R ₁ in FIG. One of them becomes the input characteristic value 2A. Here, a case where the control lift H ₁ is calculated using the control rotation speed ratio INV ₁ and the control shaft power E ₁ as the input characteristic value 2A will be described as an example. Therefore, in the pump measuring device inspection process according to the present embodiment, the control head H ₁ assumption → the reference operating point R ₀ → the reference flow rate Q ₀ → the reference power point P ₀ → the control time shaft power curve B ₁ → the control flow rate Q ₁ → Resistance curve C → Verification control head H ₁ ′ is specified in order.

The characteristic value calculation unit 16C first acquires the control head H _S of the control power point P ₁ from the pump system 5 via the data acquisition unit 11, temporarily stores it in the storage unit 15 as the inspection characteristic value 2B. (step 200), acquires the control when the rotational speed ratio INV ₁ control when the operating point R ₁ control during shaft power E _1, temporarily stored in the storage unit 15 (step 201).
Next, the characteristic value calculation unit 16C assumes a control head H ₁ and temporarily stores it in the storage unit 15 (step 202). At this time, a possible value of the control lift H ₁ is determined in advance as an assumed range, and the characteristic value of the control lift H ₁ may be assumed at predetermined intervals in order from the upper limit or the lower limit of the assumed range.

Subsequently, the characteristic value calculation unit 16C specifies the reference power point by the reference operating point specification unit 16A based on the control rotation speed ratio INV ₁ that is the input characteristic value 2A and the control lift H ₁ that is the assumed characteristic value. The process is executed to calculate the reference flow rate Q ₀ (step 203). At this time, the control operating point R ₁ and the resistance curve C cannot be directly specified from the control rotation speed ratio INV ₁ as the input characteristic value 2A and the control lift H _{1 as the} assumed characteristic value. For this reason, for example, based on the above formula (5), the reference lift H ₀ is calculated from the control lift H ₁ and the control rotation speed ratio INV ₁ , and the reference lift curve is read from the reference lift H ₀ and the storage unit 15. The reference flow rate Q ₀ may be calculated from the reference head curve A ₀ of the function formula 15A.

Next, the characteristic value calculating unit 16C based on the reference flow Q ₀ calculated at the reference operating point specifying unit 16A, in the same manner as described above by reference power point specifying unit 16B to perform a reference power point specifying processing in FIG. 8 A reference shaft power E ₀ is calculated (step 204).
Then, the characteristic value calculating unit 16C, as in step 104 to step 106 of FIG. 6 described above, the reference power point P ₀ consisting reference flow rate Q ₀ and the reference axis power E ₀ of the control when the shaft power curve B ₁ From the function shape formula, the control time axis power curve B ₁ is specified (step 205), and from this control time axis power curve B ₁ and the control time axis power E _{1 of} the input characteristic value 2A read from the storage unit 15, The control flow rate Q ₁ at the control power point P ₁ is calculated and temporarily stored in the storage unit 15 (step 206).

Next, the characteristic value calculation unit 16C reads the reference flow rate Q ₀ and the reference lift H ₀ at the reference operating point R ₀ from the storage unit 15, and uses the function shape equation 15C of the storage unit 15 as the function shape equation of the resistance curve C. The above-described equation (3) is read, a constant α is calculated from the reference flow rate Q ₀ and the reference lift H ₀ , and the resistance curve C is specified (step 207).
Subsequently, the characteristic value calculation unit 16C calculates a control control head H ₁ ′ based on the resistance curve C and the control flow rate Q ₁ at the control power point P ₁ read from the storage unit 15 ( Step 208).

Here, the characteristic value calculation unit 16C compares the control-time head H ₁ , which is an assumed characteristic value, with the control-time head H ₁ ′ for verification (step 209), and a predetermined allowable range in which an error between the two is set in advance. If not (step 209: NO), the process returns to step 202 to newly assume a characteristic value shifted from the current assumed characteristic value by a predetermined interval as the assumed characteristic value of the control head H _1. Run repeatedly.
On the other hand, when the error between the two is within a predetermined allowable range set in advance (step 209: YES), the characteristic value calculation unit 16C sets the control head H ₁ that is the assumed characteristic value as the output characteristic value 2C. Temporary storage in the storage unit 15 (step 210).

Thereafter, the measured value inspection unit 16D controls the control time axis power E ₁ calculated from the control flow rate Q ₁ and the control lift H ₁ as the output characteristic value 2C, and the control time axis power measured and input as the inspection characteristic value 2B. By calculating the measurement error ε based on the difference from E _S (step 211), reading the measurement error range related to the wattmeter to be inspected from the measurement error range 15D of the storage unit 15, and comparing it with the measurement error ε, Based on whether or not the output characteristic value 2C is within the measurement error range of the inspection characteristic value 2B, the presence or absence of the measurement value of the target measuring device, that is, the measurement normality is inspected, and the inspection result 3 is output (step 212). ), A series of pump measuring device inspection processing is completed.

[Effect of the second embodiment]
Thus, in the present embodiment, the data acquisition unit 11 acquires the control-time rotation speed ratio INV ₁ and the control-time shaft power E ₁ as the input characteristic value 2A, and the characteristic value calculation unit 16C performs control. Assuming that the hourly head H ₁ is an assumed characteristic value, the reference operating point specifying unit 16A determines the reference of the pump at the reference operating point R ₀ based on the control-time rotational speed ratio INV ₁ and the assumed characteristic value of the control-time head H _1. The flow rate Q ₀ is calculated, and the reference power point specifying unit 16B calculates the reference shaft power E ₀ of the pump at the reference power point P ₀ based on the reference flow rate Q ₀ .

Then, the characteristic value calculating unit 16C, the reference flow rate Q ₀ and the reference axis shaft power curve when control of the pump on the basis of the function-shaped type 15C of the reference power point P ₀ and the control when the shaft power curve consisting of the power E ₀ B ₁ The control flow rate Q ₁ is calculated based on the control time axis power curve B ₁ and the control time axis power E _1, and specified based on the reference operating point R ₀ and the function shape formula 15C of the resistance curve. The control control head H ₁ ′ corresponding to the assumed characteristic value is calculated from the resistance curve C of the pump and the control flow rate Q ₁ , and the comparison result between the control control head H ₁ ′ and the assumed characteristic value is calculated. Accordingly, the assumed characteristic value is calculated as the output characteristic value 2C.

As a result, when both the control-time operating point R ₁ and the control-time power point P ₁ cannot be specified from the input characteristic value 2A, specifically, one of the two input characteristic values 2A is the control-time shaft power E. ₁ and the other is the characteristic value of either the control lift H ₁ or the control rotation speed ratio INV ₁ , the desired characteristic value, here the control lift H ₁ or the control rotation speed ratio. _One of the other characteristic values of INV ₁ can be calculated, and measurement normality can be inspected for measuring devices such as a pressure gauge and a rotation speed counter corresponding to these characteristic values.

In this embodiment, the case where the input characteristic value 2A is the control rotation speed ratio INV ₁ and the control time shaft power E ₁ has been described as an example. However, the input characteristic value 2A is the control time head H ₁ and the control time axis. In the case of the power E ₁ as well, the control rotation speed ratio INV ₁ can be calculated in the same manner as described above. In this case, assuming the control when the rotational speed ratio INV ₁ in step 202 of FIG. 13, comparing the assumed characteristic value a is controlled when the rotational speed ratio INV ₁ and the verification control when the rotational speed ratio INV ₁ 'in step 209 become.

Further, in Steps 207 and 208, for example, the verification control rotational speed ratio INV ₁ ′ may be calculated based on the above-described equation (5) from the control lift H ₁ and the reference lift H ₀ that are the input characteristic value 2A, for example. . Accordingly, in the pump measuring device inspection process in this case, the control rotation speed ratio INV _{1 is} assumed → the reference operating point R ₀ → the reference flow rate Q ₀ → the reference power point P ₀ → the control time shaft power curve B ₁ → the control flow rate Q ₁ → The rotational speed ratio INV ₁ ′ during verification control is specified in order.

[Third Embodiment]
Next, with reference to FIG. 14, a pump measuring device inspection apparatus according to a third embodiment of the present invention will be described. FIG. 14: is a flowchart which shows the pump measuring device test | inspection process of the pump measuring device test | inspection apparatus concerning the 3rd Embodiment of this invention.

In the first embodiment, when the control-time shaft power E ₁ is included in the input characteristic value 2A, _one of the characteristic values of the control lift H ₁ or the control rotation speed ratio INV ₁ is the other input characteristic. The case where the other characteristic value is calculated as the output characteristic value 2C with the value 2A has been described as an example. In the present embodiment, when the control-time shaft power E ₁ is included in the input characteristic value 2A, _one of the characteristic values of the control-time lift H ₁ or the control-time rotation speed ratio INV ₁ is the other input characteristic value 2A. The case where the control flow rate Q ₁ is calculated as the output characteristic value 2C and compared with the inspection characteristic value 2B will be described.

Of the two input characteristic values 2A, a one of which controls when the shaft power E _1, if the other one is a one characteristic value any control during lift H ₁ or control when the rotational speed ratio INV _1, control-period Both the operating point R ₁ and the control power point P ₁ cannot be specified. For this reason, in the present embodiment, the characteristic value calculation unit 16C of the arithmetic processing unit 16 assumes the characteristic value of the control flow rate Q ₁ that is the output characteristic value 2C, and the output calculated based on the assumed characteristic value. A function of comparing the characteristic value 2C with the original assumed characteristic value and outputting the assumed characteristic value as the output characteristic value 2C based on the comparison result is provided. Other configurations of the pump measuring device inspection apparatus according to the present embodiment are the same as those in the first embodiment, and a detailed description thereof is omitted here.

[Operation of Third Embodiment]
Next, with reference to FIG. 14, a pump measuring device inspection process according to the third embodiment of the present invention will be described.
The arithmetic processing unit 16 of the pump measuring device inspection apparatus 1 causes the characteristic value calculating unit 16C to perform the operation according to the start instruction operation of the pump measuring device inspection processing detected by the operation input unit 12 or the arrival of the automatic execution trigger. 14 pump measuring device inspection process is started.

When the control-time shaft power E ₁ is included in the input characteristic value 2A, any _one of the control-time flow rate Q ₁ , the control-time head H ₁ , and the control-time rotation speed ratio INV ₁ at the control-time operating point R ₁ in FIG. One of them becomes the input characteristic value 2A. Here, a case where the control flow rate Q ₁ is calculated using the control lift H ₁ and the control shaft power E ₁ as the input characteristic value 2A will be described as an example. Therefore, in the pump measuring device inspection process according to the present embodiment, the control flow rate Q _{1 is} assumed → the control time axis power curve B ₁ → the reference power point P ₀ → the reference flow rate Q ₀ → the reference operation point R ₀ → the resistance curve C → The verification control flow rate Q ₁ ′ is specified in order.

The characteristic value calculation unit 16C first acquires the control flow rate Q _S of the control power point P ₁ from the pump system 5 via the data acquisition unit 11, temporarily stores it in the storage unit 15 as the inspection characteristic value 2B. (step 300), acquired during the control of the control when the operating point R ₁ pump head H ₁ and the control time shaft power E _1, temporarily stored in the storage unit 15 (step 301).
Next, the characteristic value calculating unit 16C assumes control when the flow rate Q _1, is temporarily stored in the storage unit 15 (step 302). At this time, a possible value of the control flow rate Q ₁ is determined in advance as an assumed range, and the characteristic value of the control flow rate Q ₁ is assumed at predetermined intervals in order from the upper limit or the lower limit of the assumed range.

Subsequently, the characteristic value calculation unit 16C calculates the reference power point based on the control power point P ₁ specified from the control time shaft power E _{1 as} the input characteristic value 2A and the control flow rate Q _{1 as the} assumed characteristic value. run the reference power point specifying processing in Fig. 11 in the same manner as described above to calculate the reference flow rate Q ₀ by a specific unit 16B (step 303).
Next, the characteristic value calculating unit 16C based on the reference flow Q ₀ calculated by the reference power point specifying unit 16B, the reference operating point specifying unit 16A running reference operating point specifying process described above as well as FIG. 12 A reference head H ₀ is calculated (step 304).

Next, the characteristic value calculation unit 16C reads the reference flow rate Q ₀ and the reference lift H ₀ at the reference operating point R ₀ from the storage unit 15, and uses the function shape equation 15C of the storage unit 15 as the function shape equation of the resistance curve C. The above-described equation (3) is read, a constant α is calculated from the reference flow rate Q ₀ and the reference lift H ₀ , and the resistance curve C is specified (step 305).
Subsequently, the characteristic value calculation unit 16C, based on the resistance curve C and the control head H ₁ at the control operation point R ₁ that is the input characteristic value 2A read from the storage unit 15, controls the control flow rate Q for verification. ₁ 'is calculated (step 306).

Here, the characteristic value calculation unit 16C compares the control flow rate Q ₁ which is an assumed characteristic value with the verification control flow rate Q ₁ ′ (step 307), and a predetermined allowable range in which an error between the two is set in advance. If it is not within (step 307: nO), returns to step 302 only shift characteristic value predetermined distance from the current assumptions characteristic value newly assumed as hypothetical characteristic value of the control when the flow rate Q _1, the steps 303-306 Run repeatedly.
On the other hand, when the error between the two is within a predetermined allowable range set in advance (step 307: YES), the characteristic value calculating unit 16C sets the control head H ₁ that is the assumed characteristic value as the output characteristic value 2C. Temporary storage in the storage unit 15 (step 308).

Thereafter, the measurement value inspection unit 16D controls the control flow rate Q ₁ calculated from the control lift H ₁ and the control time shaft power E ₁ as the output characteristic value 2C, and the control flow rate Q measured and input as the inspection characteristic value 2B. _A measurement error ε is calculated based on the difference from _S (step 309), and a measurement error range related to the pressure gauge to be inspected is read from the measurement error range 15D of the storage unit 15 and compared with the measurement error ε to output Based on whether or not the characteristic value 2C exists within the measurement error range of the inspection characteristic value 2B, the presence / absence of the measurement value of the target measuring device, that is, the measurement normality is inspected, and the inspection result 3 is output (step 310). Then, a series of pump measuring device inspection processing is completed.

[Effect of the third embodiment]
As described above, in the present embodiment, the data acquisition unit 11 acquires the control-time head H ₁ and the control-time shaft power E ₁ related to the pump as the input characteristic value 2A, and the characteristic value calculation unit 16C acquires the control-time flow rate. assuming Q ₁ as assuming characteristic values, the reference power point specifying unit 16B, a control during shaft power E ₁ and control when the flow rate Q ₁ control during power point P ₁ consisting of a function-shaped type 15C control during shaft power curve identify control during shaft power curve B ₁ of the pump based on, and calculates the reference flow rate Q ₀ of the reference power point P ₀ from the intersection of the control when the shaft power curve B ₁ and the reference axis power curve B ₀ .

Then, the reference operating point specifying unit 16A calculates the reference lift H ₀ based on the reference flow rate Q ₀ and the reference lift curve A ₀ , and the characteristic value calculation unit 16C includes the reference flow rate Q ₀ and the reference shaft power E _0. A resistance curve C is specified based on the reference operating point R ₀ and the function shape formula 15C of the resistance curve, and the verification control flow rate Q ₁ ′ corresponding to the assumed characteristic value from the resistance curve C and the control head H _1. And the assumed characteristic value is calculated as the output characteristic value 2C according to the comparison result between the verification control flow rate Q ₁ ′ and the assumed characteristic value.

As a result, when both the control-time operating point R ₁ and the control-time power point P ₁ cannot be specified from the input characteristic value 2A, specifically, one of the two input characteristic values 2A is the control-time shaft power E. ₁ and the other is a characteristic value of either the control head H ₁ or the control speed ratio INV ₁ , the desired characteristic value, here, the control flow rate Q ₁ can be calculated. The measurement normality can be inspected for measuring instruments such as flowmeters corresponding to these characteristic values.

In the present embodiment, the case where the input characteristic value 2A is the control head H ₁ and the control time shaft power E ₁ has been described as an example. However, the input characteristic value 2A is the control time rotation speed ratio INV ₁ and the control time axis. in the case of the power E _1, it is possible to calculate the control time flow rate Q ₁ in the same manner as described above. In this case, since the control head H ₁ is unknown, in steps 305 and 306 in FIG. 14, based on the above formula (6) from the reference flow rate Q ₀ and the control rotation speed ratio INV ₁ , The flow rate Q ₁ ′ may be calculated. Therefore, in the pump measuring device inspection process in this case, the control flow rate Q _{1 is} assumed → the control time axis power curve B ₁ → the reference power point P ₀ → the reference flow rate Q ₀ → the reference operation point R ₀ → the control control flow rate Q ₁ 'will be specified in turn.

[Extended embodiment]
In each of the above-described embodiments, the example of calculating the desired unknown output characteristic value 2C using each formula described in the principle of the pump measuring device inspection has been described. However, how to use each formula is described above. It is not limited to the example. For example, when specifying the reference operation point R ₀ from the control operation point R _1, there are a method using the resistance curve C and a method using the control rotation speed ratio INV ₁ . Therefore, when there are a plurality of methods for calculating an arbitrary characteristic value using different equations, any method may be used.

  In each embodiment, the case where two known characteristic values are calculated as the input characteristic value 2A and a desired characteristic value is calculated has been described as an example. However, the three known characteristic values are used as the input characteristic value 2A. Even when a desired characteristic value is calculated, each embodiment of the present invention can be applied, and similar effects can be obtained.

In each embodiment, the pump characteristic value used as the input characteristic value 2A has been described on the assumption that it is measured by a normal measuring device. However, the flow rate Q, the head H, the shaft power E, and the rotation speed ratio INV are described. It may not be possible to determine which of the flow meter, pressure gauge, power meter, and rotation speed counter corresponding to
In such a case, one of the four types of characteristic values acquired by the data acquisition unit 11 is used as an inspection characteristic value, and two of the remaining three characteristic values are selected in combination as input characteristic values in order. The processing unit 16 can identify an abnormal measurement device by repeating the inspection based on the above-described embodiments.

  For example, the characteristic value calculation unit 16C sets the shaft power E to the inspection characteristic value 2B, and two input characteristic values selected from the remaining flow rate Q, the lift H, and the rotational speed ratio INV, that is, the flow rate Q, the lift H, and the flow rate Q. The shaft power E is calculated as an output characteristic value for each of the three rotational speed ratios INV, lift H and rotational speed ratio INV, and these three output characteristic values and inspection characteristic values 2B are respectively calculated by the measured value inspection unit 16D. In comparison, a total of three tests are performed.

At this time, if any one of the four characteristic values, for example, the flow rate Q is abnormal, the abnormality is confirmed only in the inspection in which the input characteristic value includes the flow rate Q. Therefore, by selecting the characteristic value used in the inspection in which the abnormality is confirmed by the measurement value inspection unit 16D, it is possible to specify that the flowmeter is abnormal in this example, and the head H and the rotation speed ratio INV are identified. Similarly, other input characteristic values such as the pressure gauge and the rotation speed counter can be identified. Further, when the shaft power E that is the inspection characteristic value is abnormal, the abnormality is confirmed in all the inspections, so that the power meter can be specified as abnormal.
This inspection method can identify an abnormal measuring device only when any one of the four characteristic values is abnormal, and if two or more characteristic values are abnormal, the abnormal measuring device Cannot be identified. However, it is clear that at least these two or more characteristic values are abnormal, and it is possible to output a display prompting the inspection of the abnormal measurement of the characteristic values or the measured measuring device.

It is a block diagram which shows the structure of the pump measuring device test | inspection apparatus concerning the 1st Embodiment of this invention. It is a block diagram which shows the structural example of the pump system used as the process target of a pump measuring device test | inspection apparatus. It is explanatory drawing which shows the principle of pump characteristic value calculation. It is a schematic flowchart which shows the calculation process of a pump characteristic value. It is a flowchart which shows the pump measuring device test | inspection process (when control time axis | shaft power is an output characteristic value) of the pump measuring device test | inspection apparatus concerning the 1st Embodiment of this invention. It is a flowchart which shows the pump measuring device test | inspection process (when control-time axial power is an output characteristic value) of the pump measuring device test | inspection apparatus concerning the 1st Embodiment of this invention. It is a flowchart which shows the reference | standard driving | operation point specific process in the pump measuring device test | inspection process of FIG. It is a flowchart which shows the reference | standard power point specific process in the pump measuring device test | inspection process of FIG. It is a flowchart which shows the pump measuring device test | inspection process (when control time axis power is contained in an input characteristic value) of the pump measuring device test | inspection apparatus concerning the 1st Embodiment of this invention. It is a flowchart which shows the pump measuring device test | inspection process (when control-time axial power is contained in an input characteristic value) of the pump measuring device test | inspection apparatus concerning the 1st Embodiment of this invention. It is a flowchart which shows the reference | standard power point specific process in the pump measuring device test | inspection process of FIG. It is a flowchart which shows the reference | standard driving | operation point specific process in the pump measuring device test | inspection process of FIG. It is a flowchart which shows the pump measuring device test | inspection process of the pump measuring device test | inspection apparatus concerning the 2nd Embodiment of this invention. It is a flowchart which shows the pump measuring device test | inspection process of the pump measuring device test | inspection apparatus concerning the 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Pump measuring device inspection apparatus, 11 ... Data acquisition part, 12 ... Operation input part, 13 ... Screen display part, 14 ... Data output part, 15 ... Memory | storage part, 15A ... Reference | standard lift curve function formula, 15B ... Reference | standard shaft power Curve function formula, 15C ... function shape formula, 15D ... measurement error range, 15P ... program, 16 ... calculation processing section, 16A ... reference operating point identification section, 16B ... reference power point identification section, 16C ... characteristic value calculation section, 16D ... measured value inspection unit, 2A ... input characteristic value, 2B ... inspection characteristic value, 2C ... output characteristic value, 3 ... inspection result, 5 ... pump system, 50A ... control device, 50B ... secondary pump control device, 51A, 51B ... heat source machine, 52A, 52B ... primary pump, 53A, 53B ... forward header, 54A, 54B, 54C ... secondary pump, 55 ... differential pressure gauge, 56 ... valve, 57A ... outgoing water temperature sensor, 57B ... return water temperature Sensor, 58 ... flow meter, 59 ... instead header, 60 ... bypass line, 61, 62 ... heat pipe, 63 ...往水pipe, 64 ... Kaemizu pipe, 65 ... external load, Q ... flow, Q ₀ ... Reference flow rate, Q ₁ , Q _S ... Control flow rate, Q ₁ '... Verification control flow rate, H ... Lift, H ₀ ... Reference lift, H ₁ , H _S ... Control lift, H ₁ ' ... Verification control during lift, E ... shaft power, E ₀ ... reference axis power, E _1, E _S ... control during shaft power, INV ... rotational speed ratio, INV ₀ ... reference rotational speed ratio, INV ₁ ... control when the rotational speed ratio, INV ₁ ′… rotational speed ratio for control for verification, A ₀ ... reference lift curve, A ₁ ... control lift curve, B ₀ ... reference shaft power curve, B ₁ ... control shaft power curve, C ... resistance curve, R ₀ ... reference operation point, R ₁ ... control operation point, P ₀ ... reference power point, P ₁ ... control power point.

Claims (7)

From a pump whose rotational speed is variably controlled at an arbitrary rotational speed at the time of control, for a measuring instrument that measures a characteristic value indicating the operation status of the pump, a pump measuring instrument inspection device that inspects the measured value,
A storage unit for storing a reference lift curve indicating a relationship between a flow rate related to a pump at a predetermined reference rotation speed and a lift; and a reference shaft power curve indicating a relationship between a flow rate related to the pump at a reference rotation speed and a shaft power;
Any two of control flow rate, control head, control shaft power, and rotation speed ratio indicating the characteristics of the pump operating at the control rotation speed are acquired as input characteristic values and are subject to inspection. A data acquisition unit for acquiring inspection characteristic values measured by the target measuring device;
Based on an arbitrary characteristic value, it consists of the intersection of a resistance curve indicating the relationship between the pump flow rate and the head when the pump rotational speed is controlled with the pump piping resistance being constant, and the reference head curve of the storage unit A reference operating point specifying unit for specifying a reference operating point and calculating a reference flow rate or a reference head of the pump when operating at a reference rotation speed;
Based on an arbitrary characteristic value, a control time axis power curve indicating the relationship between the pump flow rate and the shaft power when the pump rotation speed is controlled with the pump piping resistance being constant, and the reference axis power curve of the storage unit A reference power point specifying unit for calculating a reference flow rate or a reference shaft power of the pump when operating at a reference rotational speed,
Based on the input characteristic value, the characteristic value at the reference operating point and the reference power point is sequentially calculated by the reference operating point specifying unit and the reference power point specifying unit, thereby obtaining a desired unknown characteristic value as an output characteristic value. A characteristic value calculation unit to calculate as
A measurement value inspection unit that inspects the measurement normality of the target measurement device by comparing the output characteristic value obtained by the characteristic value calculation unit and the inspection characteristic value obtained by the data acquisition unit. A pump measuring device inspection device. In the pump measuring device inspection device according to claim 1,
The storage unit stores a function shape formula related to a control time axis power curve,
The data acquisition unit acquires any two of a control flow rate, a control lift, and a rotation speed ratio related to the pump as input characteristic values,
The reference operating point specifying unit calculates a reference flow rate at a reference operating point based on the input characteristic value acquired by the data acquiring unit,
The reference power point specifying unit calculates a reference shaft power at a reference power point based on the reference flow rate calculated by the reference operation point specifying unit,
The characteristic value calculation unit includes a reference power point composed of a reference flow rate calculated by the reference operating point specifying unit and a reference shaft power calculated by the reference power point specifying unit, and a control time axis power curve function shape of the storage unit A pump measuring device inspection device characterized in that a control time axis power curve is specified based on an equation and the control time axis power is calculated as an output characteristic value from the control flow rate and the control time axis power curve. In the pump measuring device inspection device according to claim 1,
The storage unit stores function shape formulas relating to a control time axis power curve and a resistance curve,
The data acquisition unit acquires a control flow rate and a control shaft power related to the pump as input characteristic values,
The reference power point specifying unit calculates a control time axis power curve of the pump based on a control time power point consisting of the input characteristic value acquired by the data acquisition unit and a control time axis power curve function shape formula of the storage unit. Specify the reference flow rate at the reference power point from the intersection of this control time axis power curve and the reference axis power curve,
The reference operating point specifying unit calculates a reference head at a reference operating point based on the reference flow rate calculated by the reference power point specifying unit,
The characteristic value calculation unit is a resistance curve of the pump based on the reference flow rate calculated by the reference power point specifying unit, the reference head calculated by the reference operating point specifying unit, and the resistance curve function shape formula of the storage unit. A pump measuring device inspection apparatus characterized by calculating a pump control head or a rotation speed ratio as an output characteristic value from the resistance curve and a control flow rate. In the pump measuring device inspection device according to claim 1,
The storage unit stores a function shape formula related to a control time axis power curve,
The data acquisition unit acquires, as an input characteristic value, either a control head or a rotation speed ratio related to the pump and a control time shaft power,
The reference operating point specifying unit is an assumed characteristic value including a characteristic value assumed for either the control head or the rotation speed ratio acquired by the data acquisition unit and the control head or the rotation speed ratio. Based on the above, calculate the reference flow rate at the reference operating point,
The reference power point specifying unit calculates a reference shaft power at a reference power point based on the reference flow rate calculated by the reference operation point specifying unit,
The characteristic value calculation unit includes a reference power point composed of a reference flow rate calculated by the reference operating point specifying unit and a reference shaft power calculated by the reference power point specifying unit, and a control time axis power curve function shape of the storage unit The control time axis power curve is specified based on the equation, and the verification characteristic value corresponding to the assumed characteristic value is calculated based on the control time axis power curve and the control time axis power. A pump measuring device inspection apparatus characterized in that the assumed characteristic value is calculated as an output characteristic value in accordance with a comparison result of characteristic values. In the pump measuring device inspection device according to claim 1,
The storage unit stores function shape formulas relating to a control time axis power curve and a resistance curve,
The data acquisition unit acquires, as an input characteristic value, either a control head or a rotation speed ratio related to the pump and a control time shaft power,
The reference power point specifying unit includes an assumed characteristic value including a characteristic value assumed for a control flow rate and a pump control flow rate acquired by the data acquisition unit, and a pump control flow rate. Based on the control time axis power curve function shape formula, specify the control time axis power curve of the pump, calculate the reference flow rate at the reference power point from the intersection of this control time axis power curve and the reference axis power curve,
The reference operating point specifying unit calculates the reference head of the pump at the reference operating point based on the reference flow rate calculated by the reference power point specifying unit,
The characteristic value calculation unit is a resistance curve of the pump based on the reference flow rate calculated by the reference power point specifying unit, the reference head calculated by the reference operating point specifying unit, and the resistance curve function shape formula of the storage unit. The control flow rate for verification corresponding to the control flow rate that is the assumed characteristic value is calculated from the resistance curve and the control head or rotation speed ratio that is the input characteristic value, and the control control flow rate and control are calculated. A pump measuring device inspection apparatus, characterized in that a flow rate during control, which is the assumed characteristic value, is calculated as an output characteristic value according to a comparison result of hourly flow rate. In the pump measuring device inspection device according to claim 1,
The storage unit stores a measurement error range for a measurement value of the target measurement device,
The measurement value inspection unit determines whether the output characteristic value indicates a value within the measurement error range of the inspection characteristic value based on the measurement error range of the storage unit. Pump measuring device inspection device characterized by determining the presence or absence of abnormality. Using a pump measuring device inspection device including a storage unit and an arithmetic processing unit for a measuring device that measures a characteristic value indicating an operation state of the pump from a pump whose rotation speed is variably controlled at an arbitrary control rotation speed. A pump measuring device inspection method for inspecting measurement values,
The storage unit stores a reference lift curve indicating a relationship between a flow rate related to a pump and a lift at a predetermined reference rotation speed, and a reference shaft power curve indicating a relationship between a flow rate related to the pump and a shaft power at a reference rotation speed. Steps,
The data acquisition unit acquires any two of a control flow rate, a control lift, a control shaft power, and a rotation speed ratio indicating the characteristics of the pump operating at the control rotation speed as input characteristic values. A data acquisition step for acquiring an inspection characteristic value measured by a target measuring device to be inspected,
Based on an arbitrary characteristic value by the arithmetic processing unit, a resistance curve indicating a relationship between the pump flow rate and the head when the pump rotational speed is controlled in a state where the pump piping resistance is constant, and a reference head of the storage unit A reference operation point specifying step for specifying a reference operation point consisting of an intersection with a curve and calculating a reference flow rate or a reference head of the pump when operated at a reference rotation speed;
The control time axis power curve indicating the relationship between the pump flow rate and the shaft power when the pump rotation speed is controlled with the piping resistance of the pump being constant based on an arbitrary characteristic value by the arithmetic processing unit and the memory A reference power point specifying step for specifying a reference power point consisting of an intersection with the reference shaft power curve of the unit and calculating a reference flow rate or a reference shaft power of the pump when operating at a reference rotation speed;
Based on the input characteristic value, the arithmetic processing unit sequentially calculates the characteristic value at the reference operating point and the reference power point by the reference operating point specifying step and the reference power point specifying step, thereby obtaining a desired unknown A characteristic value calculating step for calculating the characteristic value as an output characteristic value;
A measurement value inspection that inspects the measurement normality of the target measuring device by comparing the output characteristic value obtained in the characteristic value calculation step and the inspection characteristic value obtained in the data acquisition unit by the arithmetic processing unit. And a pump measuring device inspection method.

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