JP2010029701A - Fire pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve conventional problems by providing a backup circuit at the periphery of an electronic circuit control device such as a microcomputer, and operating the fire pump by means of the backup circuit when an electronic circuit such as a microcomputer has failed. <P>SOLUTION: In the control device 6 for operation control of the fire pump 2 using the electronic circuit, the backup circuit is provided for operation control to replace the electronic circuit in a case where it has failed. It includes a memory for storing the state of operation control of the fire pump by the electronic circuit, and in a case where the electronic circuit has failed, it is replaced by the backup circuit, and operation control of the fire pump is carried out in accordance with the state of operation control of the fire pump by the electronic circuit stored in the memory. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fire extinguishing pump control apparatus, and more particularly to a fire extinguishing pump control apparatus that uses an electronic circuit (particularly a microcomputer) and switches the operation to a backup circuit to control the operation of the fire extinguishing pump when the electronic circuit fails.

  Fire extinguishing pumps must be promptly operated and supplied with water by fire detectors or man-made operations in the event of a fire. A conventional example will be described with reference to FIGS. FIG. 1 is a system diagram of a fire pump system. 1 is a water receiving tank or fire fighting water tank, 2 is a fire pump, and 3 is a priming water tank. Water is sent through a priming pipe 3a and a check valve 3b to remove air in the fire pump 2 and suction pipe 2a. And make sure that the fire pump is always started. 4 is a water pipe, 5 is a fire hydrant, and 5a is a start switch for starting the pump in the event of a fire. This signal is sent to the start relay 7, from which the above-mentioned signal is sent to the automatic start panel 6. As a result, the fire extinguishing pump 2 is started and water is supplied to the water supply pipe 4. Reference numeral 8 denotes a fire receiving panel, which automatically inputs a signal when the fire detector 8a is activated in the event of a fire even if the start switch 5a is not operated, and issues a command to start the fire pump 2 to the start relay 7. Reference numeral 9 denotes a switching device for switching between a normal power source and an emergency power source. FIG. 2 shows a control circuit of the fire pump control device. Here, R, S, and T are utility power supplies, MCB is a circuit breaker for wiring, 52 is an electromagnetic relay for driving a fire pump, 49 is a thermal relay, BS is a fire pump start switch, BSS is a stop switch, and 52K is a machine. A keep relay, STX, which is capable of holding the target, is a relay which receives and activates the start signal S1, 10 terminal from the start relay 7, and RC, S1 terminals are power supply terminals to the start relay 7. E1 and E2 are water level detecting means for detecting the reduced water level of the priming tank 3, and WF is the relay.

  The conventional starting method by manual operation will be described. First, when the start switch BS is pressed, the SET side of the keep relay 52K is excited and the contact 52Ka is closed. When this is closed, the electromagnetic relay 52 is energized and the fire pump 2 is started. If a power failure or power interruption occurs while the pump 2 is operating, the pump 2 stops. However, the contact 52Ka of the keep relay 52K remains closed because of a mechanical holding contact. In this state, when the normal power source is restored or the power source is turned on again, the above-described keep relay contact 52Ka remains closed without operating the start switch BS, so that the pump 2 operates again. When the stop switch BSS is pressed in this state, the RESET side of the keep relay 52K is excited, the contact 52Ka is opened, the electromagnetic relay 52 is energized, and the pump 2 is stopped.

  Next, another conventional starting method will be described. When a start command signal from the start relay 7 is transmitted to the terminals S1 and S10, the relay STX is energized, the contact STXc is closed and the SET side of the keep relay 52K is excited, and the fire pump 2 is started as described above. To do.

  Recently, with the development of electronics, mass production has been realized, and the possibility of further price reduction has increased, and the fire pump control device has begun to be electronic. However, when an electronic circuit control device such as a microcomputer is used, there is a possibility that the operation is stopped due to noise or the like and the water supply becomes impossible. For this reason, it is an obstacle used for the fire extinguishing equipment which is the most important equipment.

  In order to solve such a conventional problem, the present invention provides a backup circuit around the electronic circuit control device such as a microcomputer, and operates the fire pump with the backup circuit when the electronic circuit such as the microcomputer fails. Is.

  That is, the present invention is a fire fighting pump control device that includes a backup circuit that switches and controls the operation of the fire fighting pump when the electronic circuit fails in a control device that controls the operation of the fire fighting pump using an electronic circuit. .

  In addition, the present invention provides a control device that controls the operation of a fire pump using an electronic circuit, a memory that stores a fire pump operation control state of the electronic circuit, and controls the operation of the fire pump instead of the electronic circuit The fire extinguishing pump control device which controls the operation of the fire fighting pump according to the fire fighting pump operation control state of the electronic circuit stored in the memory using the switched backup circuit when the electronic circuit fails It is.

  And this invention is a fire extinguishing pump control apparatus which starts the said fire extinguishing pump by either ON of a switch or ON of the start signal of a start relay when the said electronic circuit fails.

  Furthermore, the present invention is a fire extinguishing pump control device that starts the fire pump by either turning on a switch, turning on a start signal of a start relay, or turning on a pressure switch when the electronic circuit fails.

  Moreover, this invention is a fire extinguishing pump control apparatus which has a circuit breaker for wiring which stops a fire extinguishing pump by interrupting | blocking when the said electronic circuit fails.

  Further, according to the present invention, an opening / closing means for closing the backup circuit when an electronic circuit fails and a switch, a signal of a start relay or a pressure switch are connected in series, and a relay that excites when these circuits are closed is connected in series. It is a fire pump control device configured to be connected.

  Further, according to the present invention, when there is an operation command from any of a switch, a start relay signal, or a pressure switch at the time of turning on the power, the backup circuit is operated, and after the electronic circuit is started, this signal is input to the input terminal. Is a fire extinguishing pump control device that outputs a signal for operating the fire extinguishing pump and reading a signal for turning off the backup circuit.

The operation of the present invention will be described.
1) The start condition of the fire pump is (1) the switch (touch switch in the embodiment) is ON, (2) when the ON signal is input to the input ports I0 and I1 (using the backup circuit, the ON signal of the start relay) , Reads the ON signal of the external switch ISW or the ON signal of the pressure switch). When this condition is satisfied, the fire pump 2 operates. However, when operating under the condition (2), a signal for turning on the relay X2 is output from the port PC1 to reset the backup operation circuit in preparation for the backup operation when the electronic circuit fails. That is, when an electronic circuit such as a microcomputer is operating normally, a signal for exciting the relay X2 is output to the port PC1. This is a normal state.

2) Fire pump stop conditions are as follows: (1) When an OFF signal is input to the input ports I0 and I1 (using a backup circuit, the start relay OFF signal, the external switch ISW OFF signal, or the pressure switch OFF signal (2) when the circuit breaker MCB for wiring is cut off. When this condition is satisfied, the fire pump 2 stops.

3) When an electronic circuit such as a microcomputer runs away due to noise or the like or fails, a signal is not output to the port PC1, the relay X2 can no longer be excited and the contact is closed. In this state, when a signal is received from the start relay due to a fire or the switch ISW is forcibly turned ON, the relay MSTX is excited and the contact is closed, the electromagnetic relay 52 is turned ON, and the fire pump is operated by the backup circuit.

  According to the present invention, when a microcomputer runs away or when an electronic circuit breaks down, it can be automatically operated with a backup circuit, so the electronic circuit can be realized with peace of mind, thereby achieving downsizing and significant cost reduction. There is an effect that can be done.

Explanatory drawing of the conventional fire pump system system. Explanatory drawing of the conventional fire pump control apparatus. Explanatory drawing of the fire pump control apparatus of Example 1. FIG. FIG. 3 is a detailed explanatory diagram of the fire pump control apparatus according to the first embodiment. Explanatory drawing of the flowchart of an example of the control procedure in the fire pump control apparatus of Example 1. FIG. Explanatory drawing of the flowchart of an example of the interruption procedure in the fire pump control apparatus of Example 1. FIG. Explanatory drawing of an example of the memory area in the fire pump control apparatus of Example 1. FIG. Explanatory drawing of the fire pump control apparatus of Example 2. FIG.

The best mode for carrying out the present invention will be described.
Hereinafter, an embodiment of the fire pump control device of the present invention will be described with reference to FIGS.

  Example 1 will be described. FIG. 3 shows a control circuit of the fire pump control apparatus of this embodiment. FIG. 4 is a detailed view of FIG. R, S, and T are normal power supplies, MCB is a circuit breaker, CT1 and CT2 are current detection means for detecting R-phase and T-phase currents, 52 is an electromagnetic relay, 52a is a power contact, and IM is a fire extinguisher. A motor for driving the pump, R and S are control power supply buses, ISW is a forced operation switch, M1 and M2 are start command input terminals from a start relay, and E is a basin water level detecting means. CU is a microcomputer CPU, touch switch TSW, display unit D, input ports I0, I1, I2, and I3 are input terminals of the control unit CU, input / output units I / O-1 to I / O-3, analog input unit AI0 , AI1, AIG, output ports O0, O1, O2, O3, and an electronic circuit unit having a non-volatile memory M, comprising a printed wiring board.

  FIG. 7 shows a memory area reserved in advance in the nonvolatile memory M. In the MSS of the name, the signals of the forced operation switch ISW or the start command input terminals M1 and M2 from the start relay are read and stored. Similarly, data of the fire pump operation state is written in the name MRUN, data of the water level detecting means is written in the name GEN, and data indicating a water-reduction alarm state is written in the name MGEN.

  An example of the control procedure for operating the fire pump control apparatus of the present embodiment will be described with reference to FIGS. 5 and 6 are flowcharts showing a control procedure for operating the fire pump control device, and are stored in advance in the internal ROM of the microcomputer CPU as a program. In FIG. 5, initialization of microcomputer registers, pointers, timer interrupt processing, etc. is performed at step 500, and the memory RAM is cleared to 0, but the nonvolatile memory MRUN and MGEN are not cleared. In step 501, an interrupt is permitted, and in step 502, a timing process is executed so that the interrupt process shown in FIG. For example, the soft timer is set to 1 msec. In this state, an interrupt occurs, and the process proceeds to the process of FIG. In step 602, it is determined whether or not the switch TSW (touch switch in this embodiment) is ON. If it is ON, “FFH” is set in the nonvolatile memory KEYSS in step 603, and if it is OFF, “FFH” is set in step 604. 00H ”is written, and the process proceeds to Step 605. Here, it is determined whether or not a start command has been given to the ports I0 and I1, and if there is, “FFH” is written to the MSS in the next steps 606 and 607. If not, the process proceeds to step 608, and the data read from the current detection means CT1, CT2 is stored in the RAM. In step 609, it is determined whether the value of the expiratory tank water level detection means is equal to or less than E1, and if it is less than this, “FFH” is written in the non-volatile memory GEN in step 610, otherwise “00H” is written in step 611. In step 613, the process returns from the interrupt to step 503. After step 503, the timer interrupt process of FIG. 6 is applied at a constant cycle.

  In step 503 of FIG. 5, it is determined whether the value of MRUN is FFH. If it is FFH, it means that the pump was operating before a power failure or power failure, so a pump operation command is output in the next step 505. In step 508, “FFH” is written in MRUN. If the determination in step 503 is 00H, it means that the pump was not operating before a power failure or power failure. In step 504, it is determined whether the MSS is FFH. If YES, in step 507, the FFH signal is output to the port PC1 to turn on the relay X2. As a result, the backup circuit is reset. The resetting of the backup circuit means that the relay MSTX is turned off and the contact MSTXa is turned off when the relay X2 is turned on. As a result, no signal is output to the input ports I0 and I1.

  By the way, if the microcomputer runs away due to external noise or the electronic circuit fails, the signal is not output to the port PC1 described above, and the contact of the relay X2 is turned on (it is turned on when the excitation of the b contact is released). become. Further, the output is not output to the port PC0, the fire relay pump operation relay 52 is also turned OFF, and the pump 2 is stopped. However, assuming that a fire has occurred in this state, the start relay SR (terminals M1 and M2) operates to form a backup circuit, the relay MSTX is turned on, the contact MSTXa is turned on, and the fire pump is turned on. The operation relay 52 is excited and the fire pump 2 is operated.

  When the process in step 507 in FIG. 5 is completed, the process proceeds to the process of starting the fire pump after step 505. If NO in step 504, it is determined in step 506 whether KEYSS is FFH. As a result of the determination, if YES, it jumps to step 505, and if NO, it means stop, and in step 509, it is determined whether MRUN is FFH. If in operation, the pump stop process is executed in step 511. In step 513, “00H” is written in MRUN. If the result of the determination at step 509 is NO, it means that the operation is continued and the routine proceeds to step 510. In step 510, a current display process is executed. Thereafter, the process proceeds to step 512, where it is determined whether GEN is FFH. If YES, a water reduction warning is output in step 517, and “FFH” is written in MGEN in step 519. Thereafter, the process returns to step 503 and the subsequent processing is continued.

  If it is determined NO in step 512 of FIG. 5, the process proceeds to step 514, where it is determined whether MGEN is FFH. If YES, it means that an alarm has been issued before a power failure or power interruption, so a water reduction alarm output process is executed in step 515. Otherwise, the water reduction alarm is reset at step 516, and “00H” is written to MGEN at step 518. Thereafter, the process returns to step 503, and the subsequent processing is continued.

  If it does in this way, if the pump is operating before the power failure or the power cut off, the backup circuit can restart the operation, and if the water decrease alarm is issued, the water decrease alarm can be output again.

  A second embodiment will be described. The present embodiment is an example applied to a sprinkler pump and will be described with reference to FIG. In the sprinkler pump shown in FIG. 1 described in the prior art, the fire pump 2 is replaced with a sprinkler pump, a pressure tank and a pressure switch are provided in the middle of the non-return valve water supply pipe in FIG. When the sprinkler head opens in the event of a fire and the pressure in the pressure tank and the water supply pipe drops and reaches a specified pressure or less, the pressure switch is closed and the sprinkler pump is operated. FIG. 8 is a control circuit of the fire pump control device. Instead of the start command signal from the start relay of FIG. 3, a pressure switch signal (contact) 63P is connected to its terminals M1 and M2. Since the operation can be the same as that of the first embodiment, detailed description is omitted.

DESCRIPTION OF SYMBOLS 1 Fire extinguishing water tank 2 Fire extinguishing pump 2a Suction pipe 3 Expiratory water tank 3a Expelling water pipe 3b Check valve 4 Water supply pipe 5 Fire hydrant 5a Start switch 6 Fire extinguishing pump control device 7 Start relay 8 Fire receiving panel 9 Switching panel 52 Electromagnetic relay 49 Thermal relay R, S, T Common power source MCB Circuit breaker CT1, CT2 Current detection means BS Fire pump start switch BSS Fire pump stop switch 52K Electromagnetic relay 52a Power side contact IM Motor ISW Forced operation switch M1, M2 Start command input terminal E Expiratory water level Detection means CU Microcomputer CPU
TSW Touch switch D Display WF Water level detection relay STX Relay RC, S1 Power supply terminal

Claims (7)

In a control device that controls the operation of a fire pump using an electronic circuit,
A fire extinguishing pump control device comprising a backup circuit that switches and controls operation of the fire extinguishing pump when the electronic circuit fails. In a control device that controls the operation of a fire pump using an electronic circuit,
A memory that stores the operation control state of the fire extinguishing pump of the electronic circuit, and a backup circuit that controls the operation of the fire extinguishing pump instead of the electronic circuit, and when the electronic circuit fails, use a switched backup circuit, A fire pump control apparatus that performs operation control of the fire pump according to a fire pump operation control state of an electronic circuit stored in the memory. In the fire pump control device according to claim 1 or 2,
The fire extinguishing pump control apparatus, wherein when the electronic circuit fails, the fire extinguishing pump is started by either turning on a switch or turning on a start signal of a start relay. In the fire pump control device according to claim 1 or 2,
The fire extinguishing pump control apparatus, wherein when the electronic circuit fails, the fire extinguishing pump is started by either turning on a switch, turning on a start signal of a start relay, or turning on a pressure switch. In the fire pump control device according to claim 3 or 4,
A fire extinguishing pump control device comprising: a circuit breaker for wiring that stops the fire extinguishing pump by shutting off when the electronic circuit fails. In the fire-extinguishing pump control apparatus of any one of Claims 3-5,
Open / close means for closing the backup circuit when an electronic circuit fails and either a switch, a start relay signal or a pressure switch are connected in series, and relays that are excited when these circuits are closed are connected in series. Fire extinguishing pump control device characterized by. In the fire pump control device according to claim 6,
When there is an operation command from any of the switch, start relay signal or pressure switch when the power is turned on, the backup circuit is activated, and after the electronic circuit is started up, this signal is read from the input terminal and based on this And a signal for turning off the backup circuit and a signal for turning off the backup circuit.

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