JPH05317449A - Automatic inspection device for fire extinguishing system - Google Patents

Abstract

PURPOSE:To effectively and forcibly close a test valve for the performance of a pump even at the time of trouble of a CPU and to reset to an initial state by providing the CPU for performing an automatic inspection of a fire extinguishing system and a valve control circuit for controlling the opening and closing of the test valve in accordance with a control signal from the CPU. CONSTITUTION:A watchdog circuit 15 for detecting a trouble of a CPU 10 and an input circuit 12 are provided. The input circuit 12 inputs a fire detecting signal from a fire detecting mechanism provided in a fire extinguishing system which detects the change of flow rate or pressure of a splinkler head operated by a fire and actuates a fire extinguishing pump 1 to the CPU 10. A valve forcibly control circuit 16 is provided for forcibly disconnecting a control signal line from the CPU 10 to a valve control circuit 11, when either one or both of the detecting output of the watchdog circuit 15 and the fire detecting signal of the fire detecting mechanism to the input circuit 12 is obtained, and for resetting a test valve 6 to an initial state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguishing equipment for automatically checking various fire extinguishing equipment such as a pump performance test by controlling a test valve provided in a test pipe in response to a command from a CPU during automatic inspection. Regarding automatic inspection device.

[0002]

2. Description of the Related Art Conventionally, in automatic inspection equipment for fire extinguishing equipment, for example, a test pipe for performing a pump performance test is provided on the pump discharge side, and a motor-operated valve for testing provided in this test pipe is used as a CPU. Control the opening by the command from and start the pump, and after the pump is started, operate the test electric valve of the test pipe by C
The PU is used to perform a closed control to perform a pump performance test, take in various data obtained by these series of inspection operations, and judge whether each data is within a predetermined range or not. ..

However, if the CPU of the automatic inspection device becomes abnormal due to a runaway or the like, particularly if the CPU becomes abnormal due to a runaway or the like at the time of opening control of the valve by automatic inspection, a fire should occur. , Since it interferes with the original fire-fighting activity, a watchdog circuit for detecting CPU abnormality is provided, and the control signal line from the CPU is forcibly disconnected by the valve control circuit when the detection output of the watchdog circuit is obtained. At the same time, valve control is performed to restore the test valve to the initial state (JP-A-1-303164).

According to such an automatic inspection device, the test valve can be reliably restored to the initial state even if the CPU becomes abnormal due to a runaway or the like while the test valve is opened by the automatic inspection. By the way, conventional fire extinguishing equipment is equipped with a fire detection mechanism that activates the fire extinguishing pump by detecting flow rate changes and water pressure changes when the sprinkler head is activated due to a fire. When a fire detection signal is received from the fire detection mechanism, this fire detection signal is taken in by the CPU of the automatic inspection device, and if the valve used for the performance test of the fire extinguishing pump is open,
The CPU forcibly closes the valve so that the fire extinguishing water can effectively be supplied under pressure from the fire extinguishing pump to the sprinkler head.

[0005]

However, in the conventional automatic inspection device, the abnormality of the CPU is monitored by the watchdog circuit and the valve is forcibly restored when the abnormality occurs. Fire detection signal to CPU
If there is an abnormality in the input interface for taking in the data, or if there is an abnormality in the CPU that cannot be detected by the watch dock circuit, even if the sprinkler head operates due to a fire during inspection, the CPU will output the fire detection signal from the fire extinguishing equipment. The valve could not be taken in and forcibly restored to the initial state,
There was a problem that pressurized fire extinguishing water from the fire extinguishing pump also flowed to the test pipe and could not be sufficiently supplied to the operated sprinkler head, resulting in impaired facility functions.

The present invention has been made in view of the above conventional problems, and is reliable even when the CPU misses the fire detection signal from the fire extinguishing equipment or when the CPU malfunctions that cannot be detected by the watchdog circuit. It is an object of the present invention to provide an automatic inspection device for fire extinguishing equipment that can forcibly close the valve for pump performance test and restore the initial state.

[0007]

In order to achieve this object, the present invention is constructed as follows. First, the present invention provides a fire extinguisher including a CPU that executes automatic inspection processing of fire extinguishing equipment and a valve control circuit that controls opening and closing of a test valve provided in a test pipe from a fire extinguishing pump by a control signal from the CPU. Targets automatic equipment inspection equipment.

In the present invention for such an automatic inspection system for fire extinguishing equipment, a watchdog circuit for detecting an abnormality of the CPU and a fire detection signal from a fire detecting mechanism provided in the fire extinguishing equipment for starting the fire extinguishing pump are provided. When at least one of an input circuit input to the CPU, a detection output of the watchdog circuit, and a fire detection signal of the fire detection mechanism for the input circuit is obtained, the CPU forcibly outputs the valve control means from the CPU. A valve forced control circuit that disconnects the control signal line and restores the test valve to the initial state is provided.

[0009]

According to the automatic inspection system for fire extinguishing equipment of the present invention having such a configuration, the input circuit for receiving the fire detection signal to be taken into the CPU, that is, the input interface has failed to take in the fire detection signal. Even if the input interface is normal and the fire detection signal is sent to the CPU normally, the CPU cannot be detected by the watchdog circuit.
Even in the case of the abnormal condition, since the fire detection signal is also given to the valve forced control circuit at the same time, the initial state can be restored by the hardware processing of the valve forced control circuit instead of the software processing of the CPU. It is possible to recover the abnormality of the CPU and the abnormality of the input interface of the CPU which cannot be detected by the watch dock circuit, and the fire extinguishing equipment can be fully brought out in the fire even during the inspection.

[0010]

FIG. 1 is a block diagram showing an embodiment of an automatic inspection system for fire extinguishing equipment according to the present invention, together with a fire extinguishing pump equipment. In FIG. 1, reference numeral 1 is a fire pump, which pressurizes fire-fighting water sucked from a water tank 2 by starting a pump motor (not shown) and sends it to a water supply main 3 installed in a vertical direction of a building, and each floor Supply to sprinkler heads and fire hydrants installed in.

On the discharge side of the fire extinguishing pump 1, a test pipe 4 for performing a pump performance test at the time of automatic inspection is provided. A test motor-operated valve 6 is provided in the test pipe 4 after the sluice valve 5, and a flow meter 7 for setting a rated flow rate in a pump performance test is further provided. As the flow meter 7, a flow switch or the like that turns on at the rated flow rate is used. The automatic inspection device 50 is provided with the CPU 10 that executes various inspection items including a pump performance test by program control. In the pump performance test of the fire pump 1 by the CPU 10, the motor-operated valve 6 is opened and controlled while the fire pump 1 is activated, and while the motor-operated valve 6 is controlled to be open, it is monitored whether or not the rated flow rate is obtained from the flow rate detected by the flow meter 7. Then, the opening control of the motor-operated valve 6 is stopped when the rated flow rate is obtained.

As a result, an actual load state in which the rated flow rate of the fire extinguishing pump 1 is made to flow through the test pipe 4 is created. With the rated flow rate, the suction side and discharge side pressures of the fire pump 1
Data such as the voltage and current of the pump motor is measured to determine whether the rated control is obtained. C like this
In order to perform the pump performance test by the PU 10, the motorized valve control circuit 11 is provided in the automatic inspection device 50 and is connected to the motorized test valve 6 via the interface 13. CP
U10 sends a control signal to the motor-operated valve control circuit 11 during the pump performance test, controls the motor-operated valve 6 to open via the interface 13, and stops the motor-operated valve opening control at the rated flow rate detected by the flow meter 7. become.

The detection signal of the flow meter 7 is the A / D converter 1
In step 4, it is converted into digital data and loaded into the CPU 10. If a flow switch is used as the flow meter 7, the A / D converter 14 is unnecessary. CPU10
Watchdog circuit 15
Is provided. CP for watchdog circuit 15
As long as the signal is output from U10 at regular intervals and the CPU 10 outputs signals at regular intervals, the watchdog circuit 15 determines that the CPU 10 is operating normally.

When the CPU 10 causes an abnormality due to a runaway or the like, the signal output to the watchdog circuit 15 is not performed at every constant cycle, and the watchdog circuit 15 detects the abnormality of the CPU 10 from the stop of the signal output. CP
The signal output from the U10 to the watchdog circuit 15 is performed by software processing by inserting a command for generating a signal output to the watchdog circuit 15 at a fixed timing in the program executed by the CPU 10.

The output of the watchdog circuit 15 is given to the motor-operated valve forced control circuit 16. When the motor-operated valve forced control circuit 16 receives the abnormality detection output of the CPU 10 from the watchdog circuit 15, the motor-operated valve control circuit 16 forcibly disconnects the control signal line from the CPU 10 to the motor-operated valve control circuit 11 and restores or closes the test motor-operated valve 6 to the initial state. Let Further, an input signal line 27 for inputting a fire notification signal from the pump control panel is connected to the CPU 10 provided in the automatic inspection device 50 via the interface 12. The input signal line 27 is further branched as an input signal line 28, and is input and connected to the motor-operated valve forced control circuit 16.

Therefore, the motor-operated valve compulsory control circuit 16 is operated by the CPU abnormality detection output from the watchdog circuit 15 or the fire notification signal from the pump control panel to operate the control signal line from the CPU 10 to the motor-operated valve control circuit 11. The disconnection and the recovery operation of the test motor-operated valve 6 from the initial state will be performed. The fire notification signal from the pump control panel through the input signal line 27 of the interface 12 is a signal output for starting the pump when the sprinkler head operates in the fire in the fire extinguishing equipment shown in FIG. Also,
A fire notification signal from the automatic fire receiver is input to the CPU 10 via the interface 12.

When the CPU 10 is normal, the CPU 10 restores the motor-operated valve 6 to the initial state for the motor-operated valve control circuit 11 by inputting a fire notification signal from the pump control panel or the automatic fire receiver. Control. 2 is shown in FIG.
The overall fire extinguishing equipment is shown in addition to around the fire extinguishing pump 1 shown in FIG.

In FIG. 2, a branch pipe 30 is connected to each floor of the building to the water supply main 3 to which the discharge side of the fire extinguishing pump 1 is connected. An alarm valve 31 is provided at a branch portion of the branch pipe 30, and a sprinkler head 32 is connected to a secondary side of the alarm valve 31. The end of the branch pipe 30 is connected to the drain pipe 33. A pressure air tank 34 is connected to the secondary side of the sluice valve 29 provided on the discharge side of the fire extinguishing pump 1. In the pressure air tank 34, the water pressure that is contained in the main water supply pipe 3 is introduced in a steady monitoring state to compress the internal air. A water pressure switch 35 is provided in the pressure air tank 34.

The water pressure switch 35 is turned on to output a fire detection signal when the pressure in the pressure air tank 34 drops below a specified pressure. In addition, the pressure air tank 34 is provided with a drainage motorized valve 36 so that the pressure air tank 3 can be automatically checked.
4 function tests are available. A priming tank 37 is provided around the fire pump 1 to constantly supply priming water to the fire pump 1. Further, a pump motor 8 for driving the fire pump 1 is installed, and the pump motor 8 is started and stopped by the pump control panel. An elevated water tank 9 is installed above the water supply main 3, and the water head pressure of the elevated water tank 9 is applied to the water supply main 3.

The automatic inspection device 50 of the present invention is provided near the pump control panel 40, for example. In addition, an automatic fire receiver 60 is installed in a management center or the like in the building to notify a fire by a fire detection signal from a fire detector separately provided. The fire detection signal from the fire extinguishing equipment can be obtained from the alarm valve 31 provided in the branch pipe 30 and the water pressure switch 35 provided in the pressure air tank 34.

That is, when the sprinkler head 32 is activated by the heat of a fire, the alarm valve 31 of the branch pipe 30
The fire extinguishing water flows to the second side, and the pressure on the secondary side drops, so that the alarm valve 31 operates in the open state, thereby closing the switch contact and outputting the fire detection signal E2. Further, when the sprinkler head 32 operates due to a fire, the water pressure in the water supply mains 3 also decreases, and the pressure in the pressure air tank 34 accordingly decreases. When the pressure in the pressure air tank 34 becomes equal to or lower than the specified pressure, the water pressure switch 34 is turned on and outputs the fire detection signal E1. The fire detection signal E1 from the water pressure switch 35 or the fire detection signal E2 from the alarm valve 31 is given to the pump control panel 40, and the fire pump 1 is operated by starting the pump motor 8.

This pump starting method differs depending on the fire extinguishing equipment. A pressure air tank system in which the pump is started by the fire detection signal E1 from the water pressure switch 35 provided in the pressure air tank 34, and an alarm valve provided in the branch pipe 30. Alarm valve starting method for starting the pump with the fire detection signal E2 from 31 and a composite starting pump when either the fire detection signal E1 from the hydraulic switch 35 or the fire detection signal E2 from the alarm valve 31 is obtained. Either of the starting methods is adopted.

The fire detection signals E1 and E2 used for starting the pump of the pump control board 40 are given to the automatic inspection board 50 by signal line connection. The fire detection signal E1 or E2 from the pump control panel 40 is the input signal line 27 shown in FIG.
Is applied to the interface 12 of the automatic inspection panel 50, and is branched to the input signal line 28 and simultaneously applied to the motor-operated valve forced control circuit 16.

Even if the pump control board 40 is one of the above-mentioned starting methods, when the fire detection signal necessary for starting the pump is obtained, the pump control board 40 sends the fire notification signal to the automatic inspection device 50. Will be sent to. Referring again to FIG. 1, when the CPU 10 receives a fire notification signal from the pump control panel or the automatic fire receiver via the interface 12, if the test motor valve 6 is opened during the pump performance test. Instructs the motor-operated valve control circuit 11 to perform a closing control,
The motor operated valve 6 is closed to restore the initial state. That is, when the CPU 10 fetches the fire transfer signal from the pump control panel via the interface 12, the test electric valve 6 is restored to the initial state by software.

FIG. 3 is an embodiment circuit diagram showing one embodiment of the motor-operated valve control circuit 11 and the motor-operated valve forced control circuit provided in the automatic inspection device 50 of FIG. In FIG. 3, the motor-operated valve control circuit 11 is provided with a relay 17 operated by a motor-operated valve activation signal from the CPU and relays 18 and 19 operated by an opening / closing control signal from the CPU 10. Relay 17,1
One ends of 8 and 19 are commonly connected and connected to a power supply line via a normally open relay contact 21a of a relay 21 provided in the motor-operated valve forced control circuit 16 which will be described later.

The relay 17 has a normally open relay contact 17a, the relay 18 has a switching relay contact 18a, and the relay 19 has a switching relay contact 19a. A NOR circuit 26 is provided in the motor-operated valve forced control circuit 16, and the fire transfer signal from the pump control panel is input from the output of the watchdog circuit 15 and the input signal line 28 branched from the input signal line 27 of the interface 12. It NOR circuit 2
Relays 21 and 20 are connected to the output of 6, and relay patterns are commonly connected and connected to a power supply line.

For this reason, the relays 20 and 21 are either the abnormality detection output by the watchdog circuit 15 or the pump control panel 40.
It will be activated by the fire notification signal from the fire detection signal detected by the fire extinguishing equipment. From the power line, the relay 2 is further connected via the normally open relay contact 20a of the relay 20.
2 are connected. Here, the relay 21 has a normally open relay contact 21a, and the normally open relay contact 21a is inserted and connected to a power supply line for the relays 17 to 19 provided in the motor-operated valve control circuit 11. Further, the relay 22 that operates by closing the normally open relay contact 20a of the relay 20 is
2a, and this relay contact 22a has a motor valve control circuit 1
1 is provided.

The drive signal from the motor-operated valve control circuit 11 to the test motor-operated valve 6 is realized by a circuit having normally open relay contacts 17a and 22a and switching relay contacts 18a and 19a. That is, the power supply line is connected to the B side of the switching relay contact 19a and the A side of the switching relay contact 18a, and the common line is connected to the B side of the switching relay contact 18a and the switching relay contact 1
It is connected to the A side of 9a. The switching output of the switching relay contact 18a is drawn from the output terminal 24a to the test motor valve 6 side through the parallel connection circuit of the normally open relay contacts 17a and 22a. On the other hand, the switching output of the switching relay contact 19a is directly drawn to the test electric valve 6 side via the output terminal 24b.

An arrester 25 is connected between the switching terminals 24a and 24b for absorbing surge. The test motor-operated valve 6 is controlled to be closed by the application of a drive voltage in which the output terminal 24a side is positive and the output terminal 24b side is negative as shown in the figure, and conversely, the output terminal 24a side is negative and 24b.
When the side receives a positive drive voltage, the open control is performed.

Next, the inspection process of the pump performance test by the automatic inspection device of the present invention will be described. First, when the CPU 10 is operating normally, C is used to perform a pump performance test.
An activation signal is given from the PU 10 to the electric valve control circuit 11, and the relay 17 operates. At this time, since there is no abnormality detection output from the watchdog circuit 15 to the motor-operated valve forced control circuit 16 and no fire notification signal from the pump control panel, the output of the NOR circuit 26 is at H level, and the relays 20 and 21 are Inactive. Therefore, relay 2
The normally open relay contact 21a of 1 is closed as shown in the figure,
Upon receiving the activation signal from the CPU 10, the relay 17 is activated.

When the relay 17 operates, the relay contact 17a
Is closed, and the output terminals 24a, 24 for the test motor-operated valve 6
The polarity of b is as shown in the figure. As a result, the test motor-operated valve 6 receives the voltage for driving in the closing direction, and if it is in the open state, it is closed and driven to the initial state. Subsequently, the CPU 10 outputs the open control signal to the electric valve control circuit 11 to operate the relays 18 and 19 in order to open the test electric valve 6. The operation of the relay 18 causes the switching relay contact 18a.
Is switched from the A side to the B side, and the switching relay contact 19a is switched from the A side to the B side by the operation of the relay 19. Therefore, the polarities of the output terminals 24a, 24b are switched to the opposite polarities, and the open control of the test electric valve 6 is started.

When the CPU 10 determines from the flow rate detected by the flow meter 7 that the rated flow rate has been reached during the open control of the test motor-operated valve 6, the start signal and the open control signal to the motor-operated valve control circuit 11 are stopped, and the relays 17 ... 19 is restored. As a result, the normally-open relay contact 17a of the relay 17 is opened to stop the supply of the drive voltage to the test motor-operated valve 6, and the switching relay contacts 18a and 19a are returned to the state shown in the drawing to open the motor-operated valve at the rated flow rate. Stop at the position where was obtained.

Next, when various data are measured with the rated flow rate flowing in the test pipe 4 and the pump performance test is completed, the CPU 10 controls the test motor-operated valve 6 to be closed. In this closing control, the CPU 10 gives only the starting signal to the motor-operated valve control circuit 11, the relay 17 is actuated to close the normally-open relay contact 17a, and the drive voltage having the polarity shown in the figure is supplied from the output terminals 24a and 24b. To drive the test motor-operated valve 6 to close and stop the start signal upon completion of closing to restore the relay 17.

Next, with the motor-operated valve for testing open controlled, CP
The operation when U10 runs out of control will be described. When the CPU 10 runs away while the test motor-operated valve 6 is controlled to open at the rated flow rate position and an abnormality detection output (H level) is given from the watch dock circuit 15 to the motor-operated valve forced control circuit 16, NOR
The output of the circuit 26 becomes L level, and the relays 20 and 21 operate.

When the relay 20 is operated, the normally open relay contact 20a is closed to operate the relay 22, and the normally open relay contact 22a provided in the motor-operated valve control circuit 11 is closed. At the same time, the operation of the relay 21 opens the normally open relay contact 21a provided in the motor-operated valve control circuit 11 to forcibly restore the relays 17 to 19. Therefore, the switching relay contacts 18a and 19a in the motor-operated valve control circuit 11 are in the illustrated initial state,
Since the normally open relay contact 22a is closed by the operation of the relay 22, the polarities of the output terminals 24a and 24b are as shown in the figure, and the test motor-operated valve 6 can be forcibly closed.

Next, the operation when the sprinkler head of the fire extinguishing equipment is activated by a fire during the inspection in which the test motor-operated valve is controlled to open at the rated flow rate position will be described. A fire occurred on a floor in the building with the test motor-operated valve 6 open-controlled to the position of the rated flow rate, the sprinkler head 32 was activated, and the fire detection signal E2 from the alarm valve 31 and / or the water pressure of the pressure air tank 34. When the fire detection signal E1 from the switch 35 is given to the pump control panel 40, the pump motor 8 is started to start the operation of the fire pump 1.

At the same time, a fire notification signal is given from the pump control panel 40 to the automatic inspection device 50. Automatic inspection device 5
If the interface 12 provided in 0 is normal, the CPU 1
0 takes in the fire alarm signal from the input signal line 27 and gives only the start signal to the motor-operated valve control circuit 11 to control the test motor-operated valve to be closed.

However, when the CPU 12 cannot properly take in the fire notification signal from the pump control panel due to an abnormality in the interface 12, the fire notification signal is transmitted via the input signal line 28 branched to the input signal line 27. It is also input to the motor-operated valve forced control circuit 16. Therefore, when the fire alarm signal (H level) from the pump control panel is received, the output of the NOR circuit 26 of the motor-operated valve forced control circuit 16 becomes L level, and the abnormality detection output from the watchdog circuit 15 is obtained. The test motor-operated valve 6 can be forcibly driven to close in the same manner as in.

When the fire notification signal is input from the pump control panel side, if the interface 17 is normal, CP
U10 and the motor-operated valve forced control circuit 16 perform recovery closing control of the test motor-operated valve 6 in parallel. However, as shown in the embodiment of FIG. 3, the motor-operated valve forced control circuit 16 is accompanied by relay driving. Therefore, it takes some time to process, and usually C
The recovery closing control by the PU 10 is performed in advance, and when the CPU 10 fails to capture the fire notification signal, the recovery closing control by the electric valve forced control circuit 16 is effectively performed.

In the above embodiment, as shown in FIG. 3, the motor-operated valve control circuit 11 and the motor-operated valve forced control circuit 1 are operated.
Although 6 is composed of a relay circuit, an analog sequence circuit or a digital sequence circuit may be used instead of the relay circuit. Further, although the above-mentioned embodiment has been described by taking the control of the motor-operated valve for the pump performance test as an example, a valve used for the automatic inspection such as the drainage motor-operated valve 36 used for the function inspection of the pressure air tank 34. May be the same.

Further, in the above embodiment, when the CPU is abnormal or the fire of the fire extinguishing equipment is detected, the test electric valve is closed and returned to the initial state. Is of course controlled to open. As described above, when the initial state is the valve open state, for example, it is provided in the main pump in order to adjust the discharge pressure of the pump.
There is a valve installed in the pilot pipe of the secondary pressure regulator.
The valve provided in this pilot pipe is closed during the pump performance test, and therefore it is controlled to be opened when the automatic inspection is stopped and the initial state is restored.

Furthermore, although the sprinkler fire extinguishing equipment has been taken as an example in the above-mentioned embodiment, it can be applied to any fire extinguishing equipment such as foam fire extinguishing equipment and indoor fire hydrant equipment.

[0043]

As described above, according to the present invention, the CPU that performs the control processing of the automatic inspection receives the fire detection signal from the fire extinguishing equipment, for example, the input interface has an abnormality and the fire is detected. CP that cannot be detected by the watchdog circuit when signal acquisition fails
Even when U is abnormal, the fire detection signal is also input to the valve forced control circuit at the same time, so it can be restored to the initial state by the hardware processing of the valve forced control circuit instead of the software processing of the CPU. Even if a fire occurs inside, the function of fire extinguishing equipment can always be fully exerted without being affected by the valve control accompanying automatic inspection.

[Brief description of drawings]

FIG. 1 is a structural diagram of an embodiment showing an automatic inspection device of the present invention together with a pump of a fire extinguishing facility.

FIG. 2 is an explanatory view of fire extinguishing equipment in which the automatic inspection device of the present invention is installed.

3 is an embodiment circuit diagram showing an embodiment of the motor-operated valve control circuit and the motor-operated valve forced control circuit shown in FIG. 1;

[Explanation of symbols]

 1: Fire extinguishing pump 2: Water tank 3: Water supply main pipe 4: Test pipe 6: Motorized valve 7: Flow meter 8: Relay board 10: CPU 11: Motorized valve control circuit 12, 13: Interface 14: A / D converter 15: Watchdog circuit 16: Motorized valve forced control circuit 17-22: Relays 17a, 20a, 22a: Normally open relay contacts 18a, 19a: Switching relay contacts 21a: Normally closed relay contacts 24a, 24b: Output terminals

Claims (1)

[Claims] 1. A CPU for executing automatic inspection processing of fire extinguishing equipment.
And a valve control circuit for controlling opening / closing of a test valve provided in a test pipe from a fire pump by a control signal from the CPU, wherein an abnormality of the CPU is detected. Watchdog circuit, an input circuit for inputting a fire detection signal from the fire detection mechanism provided in the fire extinguishing equipment for starting the fire extinguishing pump to the CPU, a detection output of the watch dock circuit, and a fire detection mechanism for the input circuit. When at least one of the fire detection signals is obtained, the C forcing the valve control circuit is forced.
A test valve controller for a fire-extinguishing equipment automatic inspection system, which is provided with a valve forced control circuit that disconnects a control signal line from the PU and restores the test valve to an initial state.