JP2537068B2 - Submersible pump equipped with data processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention collects maintenance data regarding the underwater operation of a submersible pump, such as accumulated operating time, during operation of the submersible pump underwater and temporarily collects the data. A data processing device is installed that allows the pump to be memorized and lifted from the water at the time of maintenance and inspection, temporarily installed in a proper place, and the data stored in the pump can be read out to an external base processing device. Related to the submersible pump, especially the arithmetic processing executed by the arithmetic processing means in the data processing device mounted on the submersible pump during operation of the pump in water by a commercial power source and outside of the pump by an external power source. It is related to the improvement so that it can be distinguished from the maintenance inspection.

<Prior Art> Recently, various types of submersible pumps equipped with a data processing device have been proposed, and a schematic configuration of such a submersible pump is illustrated in FIG.

Above the pump 1, a pump driving electric motor 2 having a drive shaft (not shown) connected to its rotation shaft (not shown) is mounted. During operation, total operating time, total number of governor operations,
A data processing device 3 is attached which collects data for maintenance and management relating to the underwater operation of the submersible pump, such as the cumulative operation time in the winding temperature rising state, and stores these data in a readable manner. And from the right place of the data processing device 3,
A power cord 4 extends to the outside, and a main power plug 5 that can connect the device to a commercial power source is fixed to the tip of the power cord. Furthermore, an appropriate operation surface of the processing device 3 has A data plug 6 to which a communication cable for reading maintenance data stored in the device can be connected, and the commercial power supply and the electric motor 2 are disconnected when reading the data, and power is supplied to the electric motor 2. An electric motor switch 7 is arranged for forcibly shutting off.

<Problems to be solved by the invention> However, generally, in this type of submersible pump, a commercial power source as a main power source for supplying electric power to an electric motor for driving the pump is a main power source DC voltage for operating a data processing device. Since it is electrically common to the main power supply circuit for generating water, the submersible pump is lifted from the water during maintenance and temporarily installed in a suitable place, and stored in the data processing device during underwater operation. When the data processing device 3 is operated by the main power supply circuit in order to read the data on the maintenance management toward the base processing device (not shown) provided at the temporary installation location, the data is also simultaneously supplied to the electric motor via the main power supply circuit. Power will be supplied.

As a result, even when the data is read from the data processing device 3, the electric motor operates and the submersible pump spins out of the water. Therefore, electrical noise from the submersible pump causes the data reading operation and the data reading in the data processing device 3. Not only a malfunction occurs in the data transmission operation via the plug, but also due to the idling of the submersible pump at the time of reading the data, for example, the accumulated operation time, the accumulated number of governor operations, and the winding temperature rise state are included in the data. As for the data associated with the rotation operation itself of the pump or the electric motor, such as the accumulated time, the data updated by the idling of the pump is read as that during underwater operation.
There was the inconvenience that the obtained data did not correctly represent the state during underwater operation.

To deal with such an inconvenience, at the time of data reading, returning to FIG. 1, the electric motor switch 7 of the data processing device 3 is operated to forcibly cut off the electrical connection between the main power supply circuit and the electric motor 2. It is suggested to do
According to the proposed technique, the switches including the movable member must be provided as the electric motor switch 7 on an appropriate operation surface of the data processing device 3, and the data processing device 3 is integrated with the submersible pump 1 which is operated for a long time underwater. When the switches are disposed on the outer surface of the data processing device 3 which is assembled as a result of being embedded in water, not only the reliability of the switches themselves cannot be sufficiently secured, but also the water sealing of the data processing device 3 is prevented. There was a problem that it was likely to be incomplete.

<Means for Solving the Problems> The present invention is a maintenance management related to the underwater operation of the submersible pump in view of the problems such as the decrease in reliability and the water seal failure due to the arrangement of the switches in the above-mentioned technique. The operation processing in the data processing device for processing the above data is divided into a main power supply dependent processing related to data collection and an external power supply dependent processing related to data reading, and the external power supply voltage via the data plug is used. By executing only the external power supply dependent process without driving the pump drive electric motor and executing only the main power supply dependent process while driving the pump drive electric motor with the main power supply voltage via the main power plug. By eliminating the electric motor switch, it is intended to solve the above-mentioned problems and provide an excellent submersible pump equipped with a data processor having high reliability and water sealing performance.

<Operation> Therefore, in the configuration of the present invention, when the pump 1 is operated underwater, the commercial power supply voltage supplied to the electric motor for driving the pump as the main power supply voltage is also supplied to the main power supply circuit 9, and When the arithmetic processing means 8 receives the supply of the main power DC voltage Vcc from the electric power source, the arithmetic processing means 8 executes the main power-dependent processing. On the other hand, when the pump 1 is pulled out of the water and the data is read from the arithmetic processing means 8, the data plug 6 The external power supply voltage is supplied via the external power supply circuit 10 to the external power supply circuit 10 irrespective of the electric motor for driving the pump, and in response to the external power supply signal S1 output by the external power supply detection circuit 12, the arithmetic processing is performed. The means 8 serves to execute the external power supply dependent processing.

<Embodiment> The construction and operation of an embodiment of the present invention will be described below with reference to FIGS. 2 to 3.

The data processing device 3 includes, as an arithmetic processing unit, a microprocessor 8 for executing a main power supply dependent process for collecting and storing data or an external power supply dependent process for reading data according to a predetermined program. There is.

A main power supply circuit 9 is formed between the power supply terminal 8a of the processor 8 and the main power supply connection plug 5, and the primary winding of the circuit 9 is connected to the main power supply connection plug 5. A step-down transformer 9b whose secondary winding is connected to the input corner of the diode bridge 9a, a smoothing capacitor 9c inserted between the output corners of the bridge 9a, a non-ground terminal of the capacitor 9c and a power supply. A stabilized DC power supply 9d such as a series regulator inserted between terminals 8a is included.

The electric motor 2 for driving the pump is connected between the primary windings of the transformer 9b.

On the other hand, an external power supply circuit 10 is formed between the power supply terminal 8a and the external power supply pin 6a of the data connector 6, and the circuit 10
Includes a diode 10a whose anode is connected to the power supply pin 6a and whose cathode extends to the input terminal of the series regulator 9d. The external power supply pin 6a of the data plug 6 is connected to the storage battery 11 as an external power source, and the other pin 6b of the plug 6 is read from the data processing device 3 to a base processing device outside the device. It is provided for data communication (not shown).

Further, an external power supply detection circuit 12 is formed between the input port 8b of the microprocessor 8 and the external power supply circuit 10, and the power supply circuit 12 has a resistor bleeder 12a between the anode of the diode 10a and the ground. Is inserted, and its bleeding point 12aa extends to the input port 8b via the waveform shaping amplifier 12b.

In the above configuration, during submersible operation of the pump, the commercial power supply voltage as the main power supply voltage is supplied to the electric motor 2 via the main power supply connector 5 to rotate the electric motor 2 to drive the pump 1 and simultaneously transform the commercial power supply voltage. It is supplied to the main power supply circuit 9 via 9b, where the main power supply DC voltage Vcc for operating the microprocessor 8 is generated.

That is, the commercial power supply voltage is stepped down by the transformer 9b, rectified by the diode bridge 9a, and the pulsating voltage output at the output corner is smoothed by the smoothing capacitor 9c to become a direct current voltage. The voltage is stabilized to a predetermined voltage value (usually 5) by 9d and supplied to the power supply terminal 8a of the microprocessor 8 as the main power supply DC voltage Vcc.

In this state, when the microprocessor 8 executes the program and starts (Fig. 3a), first, the input port 8b
Voltage supplied to the external power supply, that is, the external power supply detection signal S1 from the amplifier 12b in the external power supply detection circuit 12 is read (FIG. 3a), and it is determined whether or not this is “H” (third).
Figure c).

At this time, the data connector 6 is in the unconnected state,
Since the external power supply circuit 10 is not supplied with power, the bleeding point 12aa of the bleeder 12a is kept at the ground potential, and the amplifier 12b outputs "L".
The result of the above discrimination (Fig. 3c) is No.

Then, the microprocessor 8 then performs main power supply dependent processing related to the collection of maintenance data, for example,
Cumulative operating time (cumulative value of the time the motor is energized), cumulative number of governor operations (cumulative value of the number of times the motor has transitioned from the stopped state to the rotating state), the cumulative time of winding temperature rise (the winding has a predetermined value) The accumulated value of the time during which the electric motor is energized under the condition that the temperature is raised to the set temperature or higher) is collected, and a process of updating and storing the data in a memory that cooperates with the processor 8 is executed (third embodiment). Figure d).

Then, the microprocessor 8
It is determined whether or not the power supply DC voltage Vcc (main power supply DC voltage from the main power supply circuit 9 or external power supply DC voltage from the external power supply circuit 10) supplied to 8a is "H" (e in FIG. 3). ), If the determination result is Yes and the main power source DC voltage is supplied, the main power source dependent process is repeatedly executed (Fig. 3d), and the determination result is No, and the power source In the case of disconnection, the arithmetic processing is stopped (Fig. 3f).

On the other hand, when the pump is lifted up from the water for maintenance and inspection, it is temporarily installed in a proper place and the data for maintenance management stored in the data processing device 3 is read out to the base processing device, the main power supply connection is performed. The plug 5 is unconnected, the data connector 6 is connected in preparation for data communication, and the external power supply voltage from the storage battery 11 as the external power supply is supplied to the external power supply circuit 10 via the microprocessor 8 An external power supply DC voltage Vcc for operating the is generated.

That is, the external power supply voltage is supplied to the series regulator 9d shared with the main power supply circuit 9 via the diode 10a, and is supplied to the power supply terminal 8a as the external power supply DC voltage Vcc.

The diode 10a prevents the voltage and current from flowing from the main power supply circuit 9 to the external power supply detection circuit 12, so that when the power is supplied through the main power supply circuit 9, the external power supply detection circuit 12
In spite of the absence of the external power supply 11, the amplifier 12b
This is to prevent "H" of the external power supply detection signal S1 from being output from.

Now, when the external power supply voltage is supplied, the potential of the bleeding point 12aa of the bleeder 12a rises, and in response thereto, the output signal of the amplifier 12b, that is, the external power supply detection signal S1 is inverted to "H".

In this state, the microprocessor 8 starts (3rd
(A) When the external power supply detection signal S1 is read from the input port 8b (FIG. 3b) and it is discriminated (FIG. 3c), the discrimination result is Yes, and the microprocessor 8 uses the data for maintenance management. The external power supply dependent processing related to the reading of the data, for example, the processing of reading the data stored in the memory by the main power supply dependent processing and transmitting the data to the base processing unit via the data plug 6 is executed ( Three
(Figure g).

Subsequently, the microprocessor 8 discriminates the power-off in the same manner as the step of FIG. 3e (FIG. 3h), and continues the external power-source dependent processing until the power-off stops (FIG. 3f). Figure 3g).

<Effect> As described above, according to the present invention, the arithmetic processing by the microprocessor as the arithmetic processing means is performed by the main power source dependent processing related to the data collection during the underwater operation and the maintenance inspection underwater and underwater. The external power supply detection circuit outputs the data to the external power supply-dependent processing related to the data reading of the microprocessor, and when it detects that the microprocessor is operating depending on the external power supply voltage via the data plug. When the processor executes only the external power supply dependent processing in response to the external power supply signal and the processor is in the operating state depending on the main power supply voltage via the main power plug, only the main power supply dependent processing is performed. By executing the configuration described above, it is not necessary to dispose the electric motor switch on the outer surface of the data processing device and forcibly cut off the power supply to the electric motor during the data reading operation. , An excellent effect that the apparatus also significantly reduces the risk of water seal failure with reliability of a device during underwater operation is significantly improved is exerted.

[Brief description of drawings]

FIG. 1 is an external perspective view showing the configuration of a conventional device. Second
3 and 4 relate to an embodiment of the present invention,
FIG. 2 is a block circuit diagram showing its configuration, and FIG. 3 is a flow chart of a program executed by the arithmetic processing means. 1 ... Pump, 2 ... Electric motor 3 ... Data processing device, 4 ... Power cord 5 ... Main power plug, 6 ... Data plug, 7 ... Motor switch, 8 ... Calculation processing means 9 ... Main power supply circuit, 10 ... External power supply circuit 11 ... External power supply 12 ... External power supply detection circuit

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Masanori Saito 1-3-1, Ginza, Chuo-ku, Tokyo Ebara Densan Co., Ltd. (56) References JP 62-223492 (JP, A) 53-149203 (JP, U)

Claims (1)

(57) [Claims] 1. A submersible pump equipped with a data processing device 3 for processing maintenance data relating to underwater operation of a submersible pump, wherein the data processing device 3 is for driving a pump via a main power plug 5. The commercial power supply voltage supplied to the motor of the
External power supply that outputs as external power supply DC voltage Vcc instead of the main power supply DC voltage that is supplied via the main power supply circuit 9 that outputs Vcc and the data plug 6 regardless of the electric motor for driving the pump. Circuit 10 and an external power supply detection circuit that detects that the external power supply voltage is being supplied to the external power supply circuit 10 and outputs the external power supply signal S1.
12 and the main power supply DC voltage Vcc or the external power supply DC voltage Vcc is supplied to enable the operation, and when the external power supply signal S1 is supplied, it is possible to read the maintenance data regarding the underwater operation of the submersible pump. When the related external power supply dependent processing is executed and the external power supply signal S1 is not supplied,
Arithmetic processing means 8 for executing main power source dependent processing related to collection of maintenance data regarding underwater operation of the submersible pump.
And a submersible pump equipped with a data processing device.