JPH0475022B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a performance test equipment for fire pumps used for automatic inspection of sprinkler fire extinguishing equipment, etc.

(Prior Art) Conventionally, fire pumps used in sprinkler fire extinguishing equipment are required to undergo periodic performance tests to check whether they operate reliably in the event of a fire and can provide specified pump performance. As a conventional equipment for this purpose, for example, the one shown in FIG. 6 is known.

In FIG. 6, is a fire extinguishing pump installed in a basement or the like, and is operated by a motor 3 driven by a pump control panel 2. A suction pipe 4 is connected to the suction side of the fire pump 1 to pump up fire extinguishing water stored in an underground water tank 5. The discharge side of the fire pump 1 is connected to a main water supply pipe 6, and the main water supply pipe 6 stands up vertically in the building, and a branch pipe 8 is connected to each floor via an alarm valve 7. is equipped with a plurality of sprinkler heads 9.

Furthermore, a priming water tank 10 and a pressure tank 11 are installed around the fire pump, and a pressure switch 12 is installed in the pressure tank 11, which detects a drop in tank pressure due to heat-sensitive operation of any sprinkler head 9 and turns the pump on. The pump is started using the control panel 3.

On the other hand, as a performance test facility for the fire pump 1, a test pipe 13 returning from the pump discharge side to the underground water tank 5 is provided, and this test pipe 13 is provided with an electric valve 14, a flow meter 15, and a manual valve 16.

Tests using such pump performance testing equipment are
Taking an automatic inspection system as an example, when the inspection control unit (CPU) installed in a monitoring room etc. reaches a predetermined inspection cycle, it gives a start signal to the pump control panel 3 and starts the fire pump 1 by driving the motor 2. The electric valve 1 is in operation and is installed in the test pipe 13 at the same time.
4 and open the valve. Meanwhile, in this pump operating state, the inspection personnel predetermines the opening degree of the manual valve 16 so that the flow rate detected by the flow meter 15 becomes a prescribed rated flow rate.

When the rated flow rate is obtained by adjusting the manual valve 16 in this way, the inspection control device reads the pump discharge pressure and pump suction pressure detected by the pressure gauges 17 and 18, and prints out the measurement results on a printer, etc. It becomes like this.

(Problem to be solved by the invention) However, in such conventional performance test equipment, the rated flow rate was made to flow through the test piping by adjusting the manual valve, so the pump performance test when the equipment was completed was difficult. Setting the rated flow rate is complicated because the opening degree of the manual valve is initially set to the rated flow rate and subsequent performance tests are performed.

In addition, if someone moves the manual valve after the initial settings, accurate performance testing may not be possible because the rated flow rate cannot be obtained. There was a problem in that it was necessary to constantly check whether the valve was in its initial setting.

(Means for Solving the Problems) The present invention has been made in view of these conventional problems, and allows the rated flow rate to be applied to test piping at all times during performance tests without requiring initial settings using manual valves. The purpose is to provide performance testing equipment for fire pumps that allows accurate pump performance testing.

In order to achieve this objective, the present invention eliminates the manual valve in the test pipe and replaces it with an electric valve that opens and closes the valve by motor drive, and detects when the flow rate of the test pipe reaches a set rated flow rate. A rated flow rate sensor that generates an output is provided, and when the pump is started by pump start control during a pump performance test, opening control of the electric valve in the fully closed state is started, and during the opening control of the electric valve, When the detection output from the rated flow sensor is obtained, the valve opening of the motor-operated valve is controlled to be maintained, and pump discharge pressure, suction pressure, etc. are measured in this state, and after measurement, the motor-operated valve is fully closed. After the pump is fully closed, the pump is stopped and the performance test is completed.

(Function) According to the configuration of the present invention, when the electric valve is opened and closed while the pump is in operation and the flow rate of the test pipe matches the rated flow rate, the detected output of the rated flow sensor is obtained. By maintaining the obtained valve opening, it is possible to create a condition in which the rated flow rate flows through the test pipe, and the pump performance can be determined by measuring the pump discharge pressure, suction pressure, etc. with the accurate rated flow rate setting. I can do it.

(Example) FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

First, to explain the configuration, 1 is a fire pump, 3 is a motor, and the operation of the motor 3 is controlled by a pump control panel (not shown). A suction pipe 4 is connected to the suction side of the fire pump 1 and drops down to an underground water tank 5, and a discharge side of the fire pump 1 is connected to a water main pipe 6 via a gate valve 20,
The system is installed vertically in the building, and each floor has branch pipes connected to multiple sprinkler heads via alarm valves.

Furthermore, a test pipe 13 that returns to the underground water tank 5 is connected to the discharge side of the fire pump 1.
In the present invention, an electric valve 22 and a rated flow sensor 24 are provided, and a manual valve is not provided as in the conventional device.

The electric valve 22 can be driven to open and close by a built-in motor, and the rated flow sensor 24
For example, the one shown in FIG. 2 is used.

Figure 2 shows a ventilly type rated flow sensor, in which a water pipe 26 is attached to the upper part of the orifice part of the orifice pipe 25, and a magnetic float 27 is placed inside the water pipe 26, which moves up and down according to the water level. , the magnetic float 27 is connected to the orifice tube 2.
5, the Hall sensor 28 is placed at a position outside the magnetic float 27 corresponding to a predetermined rated flow rate.
is set for positioning.

Regarding the rated flow sensor shown in Fig. 2,
When the flow rate Q flowing through the orifice pipe 25 reaches the rated flow rate, the magnetic float 27 is positioned at the set position of the Hall sensor 28 as shown in the figure, and the magnetic force of the magnetic float 27 is applied to the Hall sensor 2.
8 produces a detection output. Of course, the detection output of the Hall sensor 28 cannot be obtained even if the flow rate is smaller or larger than the rated flow rate, and the detection output of the Hall sensor 28 is not obtained only at the rated flow rate.
8 detection outputs are generated.

FIG. 3 is a block diagram showing an example of a test control system for the pump performance test facility shown in FIG. 1.

In FIG. 3, 30 is a test control device;
For example, it is executed by program control using a CPU, and when automatic mode is set, a pump performance test is executed at every predetermined inspection cycle. Further, a test switch 32 is used for the test control device 30, and when the manual mode is selected, a pump performance test can be performed by operating the test switch 32.

The test control device 32 is connected to an electric valve 22 provided in the test pipe 13, a rated sensor 24, and a pressure gauge 17 for detecting, for example, the discharge pressure of the fire pump 1 through signal lines. Furthermore, the control output from the test control device 30 is given to the pump control panel 2, and the pump control panel 2 is activated to start the pump for the pump performance test. Of course, a motor 3 for driving the fire pump 1 is connected to the pump control panel 2.

Next, a pump performance test using the pump performance test equipment of the present invention will be explained with reference to the flowchart of FIG.

Assuming that the test controller 30 starts a pump performance test manually or automatically, block 40
Perform pump start control with . Subsequently, a start-up is confirmed in a judgment block 42, and if the pump is not started by switching the drive motor 3 from the normal Y-connection to the Δ-connection, the process proceeds to a block 44 to issue an abnormality alarm.

If the pump has been started normally, the electric valve 22 is controlled to open in the next block 46. Since the motor-operated valve 22 is in the fully closed state in the initial state, the motor-operated valve 22 is controlled in the opening direction at block 46. During the opening control of the electric valve 22, a judgment block 48 monitors whether a detection output based on the detection of the rated flow rate is obtained from the rated flow rate sensor 24. If the rated flow rate cannot be obtained, the process returns to the judgment block 50. Then, it is checked whether the electric valve 22 is fully open or not, and the electric valve opening control process is repeated until the rated flow rate is obtained.

At this time, when the motor-operated valve 22 is fully opened with no detection output from the rated flow rate sensor 24 being obtained, the process proceeds from the judgment block 50 to block 44 and an abnormality alarm is issued.

When the detection output of the rated flow rate sensor 24 is obtained in the judgment block 48, the process proceeds to a block 52, where the pump discharge pressure detected by the pressure gauge 17, for example, is measured and the measurement result is printed on a printer or the like. Block 54 returns the electric valve 22 to the fully closed state, and then block 5
Proceeding to step 6, since the series of pump performance tests have been completed, pump stop control is performed to end the performance test.

Incidentally, the pump performance test in the automatic inspection shown in FIG. 4 is actually performed as one item of inspection in the automatic inspection process as shown in the flowchart of FIG.

That is, FIG. 5 shows the general flow of automatic inspection processing. In block 60, inspection items, year, month, date, and time are printed, followed by block 62.
In step 64, static data is collected prior to inspection, and in the next judgment block 64, the state of the collected static data is determined to check for abnormal data. Next, in block 66, inspection items such as the pump performance test shown in FIG. 4 are performed, and in block 68, the operational data such as the pump discharge pressure when flowing the rated flow rate in the pump performance test shown in FIG. In the next block 69, the operating state is determined and the inspection result is determined. Subsequently, in block 70, termination processing is performed, such as stopping the pump operation and fully closing the electric valve.Furthermore, in block 72, stationary data after the inspection is completed is collected, the state is determined in judgment block 74, and furthermore, in block 76, inspection items are determined. The end time will be printed on the printer, and the process will proceed to other preset inspection items. Of course, if abnormal data is determined by the state determination in the determination blocks 64, 69, and 74, an abnormality alarm is issued in block 78 and the automatic inspection process is stopped.

(Effects of the Invention) As explained above, according to the present invention, there is a test pipe that returns from the pump discharge side to the water tank, and a specified rated flow rate is flowed through the test pipe in the pump operating state, and the pump discharge at this rated flow rate is In a fire pump performance test facility that measures pressure, suction pressure, etc., there is an electric valve in the test pipe that adjusts the valve opening using a motor drive, and a detection output is generated when the rated flow rate is obtained by controlling the opening of this electric valve. and a rated flow rate sensor that generates a When a detection output from the rated flow sensor is obtained, the valve opening of the electric valve is controlled to be maintained, and pump discharge pressure, suction pressure, etc. are measured in this state, and after measurement, the electric valve is fully closed. Since the performance test is completed after the pump is fully closed, there is no need to set the rated flow rate by adjusting the manual valve as in the past, and the rated flow rate is set every time the pump performance test is performed. Since the electric valve is controlled to open and close to obtain the sensor's detection output, the accurate rated flow rate can always flow through the test piping during pump performance tests.
This makes it possible to accurately judge whether or not the fire pump is in a state where it can produce specified pump performance, and it is possible to significantly improve the reliability of sprinkler fire extinguishing equipment, etc. that uses the fire pump.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an embodiment of the present invention, Fig. 2 is an explanatory diagram showing an example of the rated flow sensor used in Fig. 1, and Fig. 3 is an automatic test using the equipment of the present invention. A block diagram showing an example of the system, Fig. 4 is a flow chart showing the performance test process for equipment of the present invention, and Fig. 5 is a flow chart showing the automatic inspection process including the pump performance test of the present invention. , FIG. 6 is an explanatory diagram showing a conventional example. 1: Fire pump, 2: Pump control panel, 3: Motor, 4: Suction pipe, 5: Underground water tank, 6: Water supply main,
7: alarm valve, 8: branch pipe, 9: sprinkler head, 10: priming water tank, 11: pressure tank,
12: Pressure switch, 13: Test pipe, 20: Gate valve, 22: Electric valve, 24: Rated flow sensor, 2
5: Orifice pipe, 26: Water pipe, 27: Magnetic float, 28: Hall sensor.

Claims (1)

[Claims] 1. A fire extinguisher having a test pipe returning from the pump discharge side to the water tank, flowing a specified rated flow rate through the test pipe while the pump is in operation, and measuring the pump discharge pressure, suction pressure, etc. at the rated flow rate. In the pump performance test facility, the test pipe is equipped with an electric valve that adjusts the valve opening degree by driving a motor, and a rated flow sensor that generates a detection output when the rated flow rate is obtained by controlling the opening degree of the electric valve. Further, during a pump performance test, when the pump is started by pump start control, opening control of the motor-operated valve that is in a fully closed state is started, and during the opening control of the motor-operated valve, the rated flow rate sensor is When the detected output is obtained, the valve opening of the electric valve is controlled to be maintained, and the pump discharge pressure, suction pressure, etc. are measured in this state, and after the measurement, the electric valve is closed to be returned to the fully closed state. A performance testing facility for a fire pump, characterized in that a test control means is provided to control the pump to stop after it is fully closed and terminate the performance test.