JP2592194B2 - Automatic inspection equipment for fire extinguishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguishing system for automatically inspecting various fire extinguishing systems, such as a pump performance test, by controlling a test valve provided in a test pipe by a command from a CPU at the time of automatic inspection. It relates to an automatic inspection device.

[0002]

2. Description of the Related Art Conventionally, in an automatic inspection apparatus for fire extinguishing equipment, for example, a test pipe for performing a pump performance test is provided on a pump discharge side, and a test electric valve provided in the test pipe is connected to a CPU. The pump is started and the pump is started by the command from the controller.
A pump performance test is performed by controlling the pump to be closed by the PU, and various data obtained by the series of inspection operations are taken in to determine whether or not the various data are within a predetermined range. .

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 when the valve is controlled to be opened by the automatic inspection, a fire should occur. Since the original fire-fighting activity is hindered, a watchdog circuit for detecting an abnormality of the CPU is provided, and when a detection output of the watchdog circuit is obtained, the control signal line from the CPU is forcibly disconnected by the valve control circuit. At the same time, valve control for restoring the test valve to the initial state is performed (JP-A-1-303164).

According to such an automatic inspection device, even if the CPU becomes abnormal due to runaway or the like while the test valve is being opened by the automatic inspection, the test valve can be reliably restored to the initial state. By the way, conventional fire extinguishing equipment has a fire detection mechanism that starts a fire extinguishing pump by detecting a change in flow rate or water pressure when the sprinkler head operates due to a fire, and is installed in the fire extinguishing equipment during automatic inspection. If a fire detection signal is received from the fire detection mechanism, the fire detection signal is captured by the CPU of the automatic inspection device, and if the valve used for the performance test of the fire pump is open,
The CPU forcibly closes the valve so that the fire fighting pump can effectively supply pressurized fire fighting water to the sprinkler head.

[0005]

However, in the conventional automatic inspection device, the abnormality of the CPU is monitored by a watchdog circuit, and the valve is forcibly restored when an abnormality occurs. Fire detection signal to CPU
If there is an error in the input interface for taking in the data, or if the CPU cannot be detected by the watchdog circuit, even if a fire occurs during inspection and the sprinkler head operates, the CPU will output a fire detection signal from the fire suppression equipment. The valve cannot be forcibly restored to the initial state by taking in
Pressurized fire-extinguishing water from the fire pump flows into the test pipe, and cannot be sufficiently supplied to the activated sprinkler head, resulting in a problem that the equipment functions are impaired.

[0006] The present invention has been made in view of such a conventional problem, and can be reliably performed even when the CPU fails to detect a fire detection signal from a fire extinguishing system or when an abnormality of the CPU cannot be detected by the watchdog circuit. It is another object of the present invention to provide an automatic inspection device for a fire extinguishing system in which a valve for a pump performance test can be forcibly closed and restored to an initial state.

[0007]

In order to achieve this object, the present invention is configured as follows. First, the present invention provides a fire extinguishing system that includes a CPU that executes an automatic inspection process for a fire extinguishing system, 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 inspection equipment for equipment.

According to the present invention, such a fire extinguishing equipment automatic inspection apparatus includes a watchdog circuit for detecting an abnormality of a CPU and a fire detection signal from a fire detector mechanism provided in the fire extinguishing equipment for starting a fire extinguishing pump. And an input circuit for inputting to the CPU, the input circuit being branched from an input terminal of the input circuit.
Fire detection signal of fire detection mechanism and said watchdog circuit
Of the fire detection mechanism is supplied.
When at least one of a disaster detection signal and a detection output of the watchdog circuit is obtained, a control signal line from the CPU to the valve control circuit is forcibly disconnected and a test valve is provided. And a valve forcible control circuit for restoring the valve to an initial state.

[0009]

According to the automatic fire extinguishing equipment inspection apparatus 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 fails, and the input of the fire detection signal fails. 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 an abnormality, since the fire detection signal is also given to the valve compulsory control circuit at the same time, the initial state can be restored by hardware processing of the valve compulsory control circuit, not by software processing of the CPU. It is also possible to recover from an abnormality of the CPU that cannot be detected by the watchdog circuit and an abnormality of the input interface of the CPU, so that the function of the fire extinguishing system can always be fully exhibited in the event of a fire even during inspection.

[0010]

1 is a block diagram showing an embodiment of an automatic fire extinguishing equipment inspection apparatus according to the present invention together with a fire extinguishing pump equipment. In FIG. 1, reference numeral 1 denotes a fire extinguisher pump, which pressurizes fire extinguishing water sucked from a water storage tank 2 by starting a pump motor (not shown) and sends the pressurized fire extinguishing water to a water supply main pipe 3 installed vertically in the building. To the sprinkler head and fire hydrant installed in the area.

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

Thus, an actual load state is created in which the rated flow rate of the fire pump 1 flows through the test pipe 4. In the state of flowing the rated flow, 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, and it is determined whether or not the rated control is obtained. Such a C
In order to perform a pump performance test using the PU 10, the automatic inspection device 50 is provided with a motor-operated valve control circuit 11, and is connected to the test motor-operated valve 6 via the interface 13. CP
U10 sends a control signal to the motor-operated valve control circuit 11 at the time of the pump performance test, performs opening control of the motor-operated valve 6 via the interface 13, and stops 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 transmitted to the A / D converter 1
At 4, the data is converted into digital data and taken into the CPU 10. If a flow switch is used as the flow meter 7, the A / D converter 14 is unnecessary. CPU10
The watchdog circuit 15
Is provided. CP for the watchdog circuit 15
The signal is output from the U10 at regular intervals, and as long as the signal is output from the CPU 10 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 regular intervals, 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 to generate a signal output to the watchdog circuit 15 at a certain timing in a program executed by the CPU 10.

The output of the watchdog circuit 15 is given to a motorized valve forced control circuit 16. When the motor valve forced control circuit 16 receives the abnormality detection output of the CPU 10 from the watchdog circuit 15, it forcibly disconnects the control signal line from the CPU 10 to the motor valve control circuit 11 and restores or closes the test motor valve 6 to the initial state. Let it. 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 connected to the electric valve forced control circuit 16 for input.

For this reason, the motorized valve forced control circuit 16 is activated by the CPU abnormality detection output from the watchdog circuit 15 or the fire notification signal from the pump control panel to connect the control signal line from the CPU 10 to the motorized valve control circuit 11. The disconnection and the operation of restoring the initial state of the test electric valve 6 are 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 due to a fire in the fire extinguishing equipment shown in FIG. Also,
A fire notification signal from an automatic fire receiver is input to the CPU 10 via the interface 12.

When the CPU 10 is normal, the CPU 10 restores the test valve 6 to the initial state with respect to the motor valve control circuit 11 by inputting a fire notification signal from the pump control panel or the automatic fire receiver. Is performed. FIG. 2 shows FIG.
3 shows the overall fire extinguishing equipment in addition to the surroundings of the fire extinguishing pump 1 shown in FIG.

In FIG. 2, a branch pipe 30 is connected to the water supply main pipe 3 connected to the discharge side of the fire pump 1 for each floor of the building. 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 gate valve 29 provided on the discharge side of the fire pump 1. The water pressure sealed in the water supply main pipe 3 is introduced into the pressure air tank 34 in a steady monitoring state, and compresses the internal air. The pressure air tank 34 is provided with a water pressure switch 35.

The water pressure switch 35 is turned on when the pressure of the pressurized air tank 34 falls below a specified pressure to output a fire detection signal. Further, an electric drainage valve 36 is provided in the pressurized air tank 34 so that the automatic pressurized air tank 3
4 function test. A priming tank 37 is provided around the fire pump 1 and constantly supplies priming water to the fire pump 1. Further, a pump motor 8 for driving the fire pump 1 is provided, and the pump motor 8 is started and stopped by the pump control panel. An elevated water tank 9 is provided above the water supply main pipe 3, and the head pressure of the elevated water tank 9 is applied to the water supply main pipe 3.

The automatic inspection device 50 of the present invention is provided, for example, near the pump control panel 40. In addition, an automatic fire receiver 60 that performs a fire notification based on a fire detection signal from a separately provided fire detector is installed at a management center or the like in the building. A fire detection signal from the fire extinguishing system can be obtained from an alarm valve 31 provided in the branch pipe 30 and a hydraulic switch 35 provided in the pressurized air tank 34.

That is, when the sprinkler head 32 is operated by receiving heat from a fire, the alarm valve 31 of the branch pipe 30 is operated.
When the water for fire extinguishing flows through and the pressure on the secondary side decreases, the alarm valve 31 operates to open, 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 of the water supply main pipe 3 also decreases, and accordingly, the pressure of the pressurized air tank 34 also decreases. When the pressure of the pressurized air tank 34 becomes equal to or lower than the specified pressure, the water pressure switch 34 is turned on, and the fire detection signal E1 is output. 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 pump motor 8 is activated to operate the fire pump 1.

The pump starting method differs depending on the fire extinguishing equipment. The pressure air tank method starts the pump by a fire detection signal E1 from a water pressure switch 35 provided in the pressure air tank 34. The alarm valve provided in the branch pipe 30 An alarm valve activation method in which the pump is activated by the fire detection signal E2 from the pump 31, and the pump is activated when either the fire detection signal E1 from the water pressure switch 35 or the fire detection signal E2 from the alarm valve 31 is obtained. One of the following is adopted.

The fire detection signals E1 and E2 used for starting the pump of the pump control panel 40 are given to the automatic inspection panel 50 by connecting signal lines. The fire detection signal E1 or E2 from the pump control panel 40 is connected to the input signal line 27 shown in FIG.
Is supplied to the interface 12 of the automatic inspection panel 50, and is branched at the input signal line 28 and simultaneously supplied to the electric valve forced control circuit 16.

Even if the pump control panel 40 uses any one of the above-mentioned starting methods, when a fire detection signal necessary for starting the pump is obtained, the pump control panel 40 outputs a fire notification signal to the automatic inspection device 50. Will be sent to Referring again to FIG. 1, if 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-operated valve 6 is opened during the pump performance test. Instructs the motorized valve control circuit 11 to perform closing control,
The motor-operated valve 6 is closed to restore the initial state. That is, when the CPU 10 receives the fire notification 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 an embodiment of the motor-operated valve control circuit 11 and the motor-operated valve compulsory 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 an electric-valve activation signal from the CPU and relays 18 and 19 operated by an open / close control signal from the CPU 10. Relay 17,1
One end of each of the terminals 8 and 19 is commonly connected, and is connected to a power supply line via a normally open relay contact 21a of a relay 21 provided in the motor-operated valve compulsory 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. The electric valve forced control circuit 16 is provided with a NOR circuit 26, which receives an output of the watchdog circuit 15 and a fire notification signal from the pump control panel through an input signal line 28 branched from an input signal line 27 of the interface 12. You. NOR circuit 2
Relays 21 and 20 are connected to the output of No. 6, and the relay patterns are commonly connected and connected to a power supply line.

For this reason, the relays 20 and 21 are connected to the abnormality detection output by the watchdog circuit 15 or the pump control panel 40.
From the fire notification signal from the fire extinguishing system. 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. The relay 22 that is activated by closing the normally open relay contact 20a of the relay 20 is a relay contact 2
2a, and the relay contact 22a is connected to the motor-operated 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
9a is connected to the A side. The switching output of the switching relay contact 18a is drawn out from the output terminal 24a to the test electric valve 6 side through a 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 via the output terminal 24b.

An arrester 25 is connected between the switching terminals 24a and 24b for absorbing surge. As shown in the figure, the test motor-operated valve 6 is controlled to be closed by receiving a drive voltage applied with the output terminal 24a being positive and the output terminal 24b being negative.
Open control is performed when a positive drive voltage is received on the side.

Next, an inspection process of a pump performance test by the automatic inspection device of the present invention will be described. First, when the CPU 10 is operating normally, C
A start signal is provided from the PU 10 to the motor-operated valve control circuit 11, and the relay 17 is operated. At this time, since there is no abnormality detection output from the watchdog circuit 15 to the motor-operated valve compulsory control circuit 16 and no fire notification signal from the pump control panel, the output of the NOR circuit 26 is at the H level. Inactive. Therefore, relay 2
One normally open relay contact 21a is closed as shown in FIG.
Upon receiving a start signal from the CPU 10, the relay 17 is operated.

When the relay 17 operates, the relay contact 17a
Are closed, and the output terminals 24a, 24
The polarity of b is as shown in the figure. Thus, 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 an open control signal to the motor-operated valve control circuit 11 to operate the relays 18 and 19 in order to control the motor-operated valve 6 for opening. By the operation of the relay 18, its switching relay contact 18a
Is switched from the A side to the B side, and the operation of the relay 19 switches the switching relay contact 19a from the A side to the B side. Therefore, the polarities of the output terminals 24a and 24b are switched to the opposite polarities, and the opening control of the test electric valve 6 is started.

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

Next, when various data are measured while the rated flow rate is passed through the test pipe 4 and the pump performance test is completed, the CPU 10 controls the motorized test valve 6 to be closed. In this closing control, the CPU 10 supplies only a start signal to the motor-operated valve control circuit 11, the normally-open relay contact 17 a is closed by the operation of the relay 17, and the driving voltage having the illustrated polarity is applied from the output terminals 24 a and 24 b to the motor-operated valve 6 for testing. To drive the test motor-operated valve 6 to close, and upon completion of the closing, the start signal is stopped and the relay 17 is restored.

Next, with the test motor-operated valve controlled to open, the CP
The operation when U10 runs away will be described. When the CPU 10 runs out of control and the watchdog circuit 15 outputs an abnormality detection output (H level) to the motor-operated valve compulsory control circuit 16 with the test motor-operated valve 6 opened to the rated flow position, 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, and the relay 22 is operated to close the normally open relay contact 22a provided in the motor-operated valve control circuit 11. At the same time, the normally open relay contact 21a provided in the motor-operated valve control circuit 11 is opened by the operation of the relay 21, and the relays 17 to 19 are forcibly restored. Therefore, the switching relay contacts 18a and 19a in the motor-operated valve control circuit 11 are in the initial state shown in the drawing,
The normally open relay contact 22a is closed by the operation of the relay 22, so that the polarities of the output terminals 24a and 24b are as shown in the drawing, and the electric test valve 6 can be forcibly closed.

Next, the operation when the sprinkler head of the fire extinguishing system operates due to a fire during the inspection in which the test motor-operated valve is controlled to open to the rated flow position will be described. When the test motor-operated valve 6 is opened and controlled to the rated flow position, a fire occurs on a certain floor of the building, the sprinkler head 32 operates, and the fire detection signal E2 from the alarm valve 31 and / or the water pressure of the pressurized air tank 34 When the fire detection signal E1 from the switch 35 is given to the pump control panel 40, the operation of the fire pump 1 is started by the activation of the pump motor 8.

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
0 if the interface 12 provided for the CPU 1 is normal.
Numeral 0 captures a fire notification signal from the input signal line 27 and gives only a start signal to the motor-operated valve control circuit 11 to close and control the motorized test valve.

However, if the interface 12 has an error and the CPU 10 cannot normally receive the fire notification signal from the pump control panel, 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 motorized valve forced control circuit 16. For this reason, when the output of the NOR circuit 26 of the electric valve forced control circuit 16 becomes L level in response to the fire notification signal (H level) from the pump control panel, and the abnormality detection output from the watchdog circuit 15 is obtained. Similarly, the test electric valve 6 can be forcibly driven to close.

When a fire notification signal is input from the pump control panel, if the interface 17 is normal, the CP
The U10 and the motorized valve forced control circuit 16 perform the recovery closing control of the test motorized valve 6 in parallel, but the motorized valve forced control circuit 16 involves relay driving as shown in the embodiment of FIG. Therefore, it takes some time to process, 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 electric valve control circuit 11 and the electric valve forcible control circuit 1
Although 6 is constituted by a relay circuit, an analog sequence circuit or a digital sequence circuit may be used instead of the relay circuit. In the above-described embodiment, the control of the motor-operated valve performed for the pump performance test is taken as an example. However, the valve used for the automatic inspection such as the motor-operated drain valve 36 used for checking the function of the pressurized air tank 34 is used. 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 motor-operated valve is closed and returned to the initial state. Of course, the opening control is performed. As described above, the initial state in which the valve is in the open state is, for example, a state in which the pump main pipe is provided to adjust the discharge pressure of the pump.
There is a valve provided in the pilot pipe of the secondary pressure regulator.
The valve provided in the pilot pipe is closed during the pump performance test, and therefore, when the automatic inspection is stopped and the initial state is restored, the valve is controlled to be open.

Further, in the above embodiment, the sprinkler fire extinguishing equipment is taken as an example, but the present invention 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, an input circuit for taking in a fire detection signal from a fire extinguishing system into a CPU performing control processing for automatic inspection, for example, a fire detection when an input interface has an abnormality. If the signal acquisition fails or the CP cannot be detected by the watchdog circuit
In the event of an abnormality in U, the fire detection signal is also input to the valve compulsory control circuit at the same time. Therefore, the initial state can be restored by hardware processing of the valve compulsory control circuit, not by software processing of the CPU. Even if a fire occurs, the function of the fire extinguishing system can always be fully exhibited without being affected by the valve control accompanying the automatic inspection.

[Brief description of the drawings]

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

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

FIG. 3 is a circuit diagram showing an embodiment of the motor-operated valve control circuit and the motor-operated valve forcible control circuit of FIG. 1;

[Explanation of symbols]

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

Claims (1)

(57) [Claims] 1. A CPU for executing an automatic inspection process for a fire extinguishing system.
An automatic inspection system for fire extinguishing equipment, comprising: a valve control circuit for controlling the opening and closing of a test valve provided in a test pipe from a fire extinguishing pump in accordance with a control signal from the CPU; A watchdog circuit, an input circuit for inputting a fire detection signal from a fire detection mechanism provided in a fire extinguishing system that starts a fire pump to the CPU, and the fire detection mechanism branched from an input terminal of the input circuit.
The fire detection signal and the detection output of the watchdog circuit
Are supplied, and the fire detection signal of the fire detection mechanism and
A valve compulsory control circuit for forcibly disconnecting a control signal line from the CPU to the valve control circuit and restoring a test valve to an initial state when at least one of the detection outputs of the watchdog circuit is obtained. automatic inspection apparatus extinguishing equipment, characterized in that a and.