JPH0316692Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a fire extinguishing equipment that tests the actual load operation of the fire pump by opening the pipe end test valve installed at the end of the branch pipe to create the same conditions as when the fire extinguishing head is operating. Regarding automatic inspection equipment.

Conventionally, in fire extinguishing equipment that sprays pressurized extinguishing fluid from a sprinkler head when a fire breaks out, an automatic inspection device periodically checks the equipment, for example every month, to check whether the equipment is operating normally. Inspection data is obtained by operating the pump every time, measuring the pump operating status with a detector, and processing the data. A test valve at the end of the pipe is opened by a control signal from the inspection device, creating a situation similar to when a sprinkler head is activated, lowering the pressure inside the pipe, detecting a drop in the pressure inside the pipe, and starting the pump to prevent a fire. The inspection data is obtained by performing the same actual load operation.

However, when the data processing is completed in the actual load operation test of the fire pump by opening the test valve at the end of the pipe, the test valve at the end of the pipe is closed and the pump is stopped. When the valve is closed, a large water hammer occurs due to the sudden closure of the valve, producing a considerable impact sound and applying impact to the piping connections, damaging the seals and causing water leaks. I was afraid.

The present invention was developed in view of these conventional problems, and in the actual load operation test of fire extinguishing equipment conducted with the test valve at the end of the pipe open, it eliminates water hammer when the test valve at the end of the pipe is closed, and also improves the pump performance. An object of the present invention is to provide an automatic inspection device for fire extinguishing equipment that prevents the pressure inside the pipe from decreasing even when the pipe is shut down.

In order to achieve this purpose, the present invention first stops the fire pump while the test valve at the end of the pipe remains open, after collecting various inspection data by driving the fire pump by opening the test valve at the end of the pipe. After this pump is stopped, the test valve at the end of the pipe is closed, and once the test valve at the end of the pipe is closed, the extinguishing pump is driven again to restore the pressure inside the pipe to the specified pressure, completing a series of inspections, and confirming that the pump is in operation. This prevents water hammer caused by closing the test valve at the end of the pipe, and also maintains the pressure inside the pipe at a normal value after the test.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is an explanatory diagram showing an example of fire extinguishing equipment in which the automatic inspection device of the present invention is used.

First, to explain the configuration, pump equipment equipped with a fire pump 2 driven by a motor 1 is located in the basement of a building.
Installed on the B1F, the suction side of the fire pump 2 is suspended from a water source tank 3, the discharge side of the fire pump 2 is connected to a main pipe 4, and the main pipe 4 rises vertically through the building. Furthermore, a pump control panel 5 for controlling the operation of the fire pump 2 is installed in the pump equipment on the basement floor B1F.

A branch pipe 6 is connected to the main pipe 4 connected to the discharge side of the fire pump 2 via an alarm valve 7 for each floor 1F, 2F, etc., and a plurality of fire extinguishing heads 8 are connected to the branch pipe 6. Furthermore, the terminal end of the branch pipe 6 is connected to a drain pipe 10 via a pipe end test valve 9 using a solenoid valve. Note that a manual test valve 11 is connected in parallel with the pipe end test valve 9.
When the tube malfunctions, automatic inspection can be performed by manually operating the manual test valve 11 and opening the test valve at the end of the pipe according to the present invention.

Also, the alarm valve 7 provided in each branch pipe 6 is activated by the water pressure flowing into the alarm valve 7 by water spraying from the fire extinguishing head 8 or by opening the test valve 9 at the end of the pipe, and the alarm valve 7 is activated by the pump control panel 5. On the other hand, a pressure switch 12 that outputs a pump activation signal and a pressure gauge 13 that detects the pressure inside the branch pipe 6 are provided.

FIG. 2 is a block diagram showing an embodiment of the automatic inspection device according to the present invention, and the automatic inspection control device 1.
A microcomputer is used as 4, and therefore, the automatic inspection control device 14 is composed of a central processing unit (hereinafter referred to as CPU) 15, a ROM that permanently stores an automatic inspection control program, and a RAM that temporarily stores inspection data, etc. The test valve 9 at the end of the pipe, the pressure gauge 13 provided in the alarm valve 7, and the pump control panel 5 are connected to the signal line to the interface 17. A signal line from the motor 1 for detecting the start and stop of the motor 1 for driving the fire extinguishing pump by the control panel 5 is connected. Further, an end-of-tube inspection signal is supplied to the CPU 15 of the automatic inspection control device 14, and this end-of-line inspection signal is given based on manual operation or a signal from a clock unit.

Here, the structural requirements for performing automatic inspection by opening the pipe end test valve 9 executed under program control of the CPU 15 are as follows: A valve closing means that sends a pump stop signal and closes the test valve at the end of the pipe which is in an open state after the pump stop control, and after the valve closing means fully closes the test valve at the end of the pipe, outputs a pump drive signal to extinguish the fire. The pump re-driving means re-drives the pump and sends a pump stop signal after the pressure in the pipe has recovered to a predetermined pressure.

Next, an automatic inspection device according to an embodiment of the present invention will be described with reference to the flowchart of FIG.

First, when a terminal inspection signal is given to the CPU 15 of the automatic inspection control device 14 manually or from the clock unit, the CPU 15
A control signal is output to the tube end test valve 9 through the tube end test valve 9 as shown in block 18 in FIG.
will be released. If this opening of the pipe end test valve 9 is a control signal for opening the pipe end test valve 9 of 1F shown in FIG.
When the water is opened, a flow path is formed from the branch pipe 6 to the drain pipe 10, and a flow of fire extinguishing water is created in the branch pipe 6 in the same way as when the fire extinguishing head 8 is activated. , the pressure switch 12 is activated and outputs a switch signal to the pump control panel 5 to start the fire pump 2,
A fire pump 2 is driven by the motor 1. That is, if the fire extinguishing equipment is normal, the fire pump 2 will start up a certain period of time after the tube end test valve 9 is opened. The activation of the pump due to the opening of the test valve 9 at the end of the pipe is monitored by the determination block 19 in FIG. When the collection of inspection data in block 20 is completed, the flow advances to block 21, where a pump stop signal is output, and the fire pump 2 is stopped when the test valve 9 at the end of the pipe is open. This block 21
When the pump is stopped, a closing control signal is output to the tube end test valve 9 which is in the open state, and the tube end test valve 9 is closed as shown in block 22.

As described above, when the test valve 9 at the end of the pipe is closed while the fire pump 2 is stopped, the pressure inside the branch pipe 6 has decreased, so the block 23 outputs the pump drive signal again to restart the fire pump. 2
In block 24, after a predetermined period of time for the internal pressure of the branch pipe 6 to recover to the specified pressure, a pump stop signal is output to stop the re-driven fire pump 2, and automatic inspection is performed by opening a series of test valves at the end of the pipe. end.

On the other hand, if the pump is not driven even when the pipe end test valve 9 is opened in block 18 based on the pipe end inspection signal, it is determined in the discrimination block 19 that there is an abnormality in the fire extinguishing equipment, and the block 25 An alarm will be issued to indicate an abnormality in the fire extinguishing equipment.

In this way, with the automatic inspection device of the present invention, the fire pump driven by the opening of the pipe end test valve is stopped with the pipe end test valve open, and the pipe end test valve is closed after the pump is stopped. , no water hammer occurred due to the closing of the test valve at the end of the pipe, and on the other hand, the pressure inside the pipe decreased due to stopping the pump with the test valve at the end of the pipe open. Since the pressure inside the pipe is restored to the specified pressure by restarting the pump, even if the test valve at the end of the pipe is opened and the pump is operated under actual load, the pressure inside the pipe can be maintained at the normal value of the specified pressure after the inspection is completed. can.

The above embodiment was an example of automatic inspection by opening the pipe end test valve 9 provided on the 1st floor, but when the inspection on the 1st floor is completed, the pipe end test valve 9 on the 2nd floor is subsequently opened. A similar automatic inspection process is performed, and this inspection process is repeated up to the pipe end test valve on the top floor. In addition, in the above embodiment, the fire pump that was re-driven after the pipe end test valve was closed is stopped after a predetermined period of time has elapsed.
The fire pump may be detected and monitored using a method such as the above, and the re-driven fire pump may be stopped when the detected pressure reaches a specified pressure. Furthermore, although the above embodiments were based on the case where water was used as fire extinguishing water,
The present invention is not limited to this, and can be applied as is to automatic inspection of fire extinguishing equipment using fire extinguishing agent as fire extinguishing water.

Next, to explain the effect of the present invention, once the collection of various inspection data is completed by driving the fire pump by opening the test valve at the end of the pipe, first, while the test valve at the end of the pipe remains open, the fire pump is stop and
Since the pipe end test valve is closed after the pump is stopped, the water hammer effect caused by the closure of the pipe end test valve is completely prevented, and damage to the piping system due to the water hammer effect can be reliably prevented.

In addition, since the fire pump is driven again after closing the test valve at the end of the pipe when the fire pump is stopped, the fire pump is driven again for a predetermined period of time or until the specified pressure inside the pipe is obtained. can be maintained at an appropriate specified pressure at the end of the inspection, and the operation of the fire extinguishing equipment in the monitored state after the inspection is completed can be guaranteed.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an example of a fire extinguishing equipment using the automatic inspection device of the present invention, Fig. 2 is a block diagram showing an embodiment of the present invention, and Fig. 3 is a pipe end test valve of the present invention. This is a flowchart showing the automatic inspection process performed by opening the door. 1: Motor, 2: Fire pump, 3: Water source tank,
4: Main pipe, 5: Pump control panel, 6: Branch pipe, 7:
Alarm valve, 8: Fire extinguishing head, 9: Pipe end test valve, 1
0: Drain pipe, 11: Manual test valve, 12: Pressure switch, 13: Pressure gauge, 14: Automatic inspection control device, 15: CPU (Central Processing Unit), 16: Memory, 17: Interface.

Claims (1)

[Scope of Claim for Utility Model Registration] Extinguishing liquid pressurized by a fire extinguishing pump is supplied to the fire extinguishing head through the main pipe and branch pipes connected to each floor, and the end of the branch pipe is connected through a test valve at the end of the pipe. The test valve at the end of the pipe is opened during automatic inspection to reduce the pressure inside the pipe, and when it is detected that the pressure inside the pipe has fallen below a certain value, the fire extinguishing pump In an automatic inspection device for fire extinguishing equipment, which starts up the actual load operation, measures the pump status during the actual load operation with a detector, and processes the data, a pump stop signal is sent after completing the data processing during the actual load operation. a valve closing means for closing the test valve at the end of the pipe which is in an open state after the pump stop control; 1. An automatic inspection device for fire extinguishing equipment, comprising: pump re-driving means for re-driving the pump and sending a pump stop signal after the pipe pressure has recovered to a predetermined pressure.