JPH04285573A - Automatic inspection device for fire extinguishing facility - Google Patents

Abstract

PURPOSE:To make inspection of a fire extinguishing pump simply and shortly. CONSTITUTION:A motor-driven valve is used as a discharge valve 5 which is installed on the way of a line 4 tying a fire extinguishing pump 2 to sprinkler heads 3-1 through 3-n. Also a motor-driven valve is used for a primary pressure adjusting valve 10. These valves 5, 10 are closed by remote operation to bring the discharge side of the pump 2 into shut-off state, and then the pump 2 is started to conduct the pump shut-off operation test.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to an automatic inspection device for fire extinguishing equipment that can periodically automatically inspect the fire extinguishing equipment based on various information from various sensors placed in the fire extinguishing equipment, and in particular, the invention relates to an automatic inspection device for fire extinguishing equipment that can automatically inspect the fire extinguishing equipment periodically based on various information from various sensors arranged in the fire extinguishing equipment. This invention relates to an automatic inspection device for fire extinguishing equipment that performs a pump shut-off operation test as a shut-off state.

0002

BACKGROUND OF THE INVENTION Due to its nature, fire extinguishing equipment is normally not in operation. However, in the event of a fire, it is necessary to perform its functions 100%. For this reason, daily inspections and maintenance are important so that they can be operated at any time, and the Fire Service Act requires inspections and reporting. For example, one of the regular test items is a pump shut-off operation test. In this pump shut-off operation test, the discharge side of the fire pump was closed, and the discharge pressure, suction pressure,
Check whether the current value, rotation speed, etc. are normal, that is, whether the fire pump exhibits the specified performance. Conventionally,
In this pump shut-off operation test, a discharge valve was installed in the middle of the connecting pipe connecting the fire pump and the fire extinguishing head (sprinkler, fire hydrant, etc.), and this discharge valve was manually closed to shut off the discharge side of the fire pump. . In other words, if a pump shut-off test is conducted without a discharge valve installed, there is a risk of damage to the equipment installed in the piping system and the fire extinguishing head due to an increase in the discharge pressure of the fire pump. This discharge valve must be closed when conducting the test.

0003

[Problem to be Solved by the Invention] However, in the past, the discharge valves had to be manually closed one by one during the pump shut-off operation test, and the discharge valves had to be manually opened one by one after the test was completed. However, when there are a large number of fire pumps to be inspected, there is a problem in that it takes a lot of effort and time.

0004

[Means for Solving the Problems] The present invention has been proposed to solve such problems, and the first invention (invention according to claim 1) is a connection between a fire pump and a fire extinguishing head. For example, the discharge valve provided in the middle of the pipe is an electric valve,
For example, a mechanism that can be closed by an electric signal is attached to the primary pressure regulating valve provided to adjust the discharge pressure, and this electric discharge valve and the primary pressure regulating valve are closed by remote control to shut off the discharge side of the fire pump. Moreover, the fire pump was started and a pump shut-off operation test was performed. Further, the second invention (invention according to claim 2) is the first invention, in which, upon completion of the pump shut-off operation test, the primary pressure regulating valve is operated and then the discharge valve is opened by remote control. It is.

[0005]

[Operation] Therefore, according to the first aspect of the present invention, after the discharge valve and the primary pressure regulating valve are closed by remote control, the fire pump is started and a pump shut-off operation test is performed. Further, in the second invention, when the pump shut-off operation test is completed, the primary pressure regulating valve is operated before the discharge valve is opened. This makes it possible, for example, to release the high water pressure in the pressure tank that has increased during the pump shut-off operation test and reduce the water pressure to low water pressure before the discharge valve is opened.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The automatic inspection device for fire extinguishing equipment according to the present invention will be explained in detail below.

FIG. 1 is a system configuration diagram showing an embodiment of fire extinguishing equipment including this automatic inspection device. In the figure, 1 is a water tank, 2 is a fire pump, 3-1 to 3-n are sprinkler heads, 4 is a connecting pipe connecting the fire pump 2 and sprinkler heads 3-1 to 3-n, and 5 is a connecting pipe. Electric discharge valve provided in the middle of path 4, 6 is a pressure tank, 7
is an auxiliary pressure pump, and 8 is a priming tank.

The fire pump 2 pumps up water in the water tank 1 through a suction pipe 2-2 via a foot valve 2-1. A check valve 9-1 is provided in the connecting pipe 4-1 that connects the fire pump 2 and the electric discharge valve 5. In addition, connection pipe 4-1
, a primary pressure regulating valve (electrically operated valve) 10 is attached. The pressure tank 6 includes a fire pump pressure switch 6-1,
A pressure switch 6-2 for the auxiliary pressurizing pump is provided, and an electric drain valve 11 is provided to drain water from the tank.
is attached. The auxiliary pressure pump 7 is a foot valve 7-1
The water in the water tank 1 is pumped up through the suction pipe 7-2. The water pumped by this auxiliary pressurizing pump 7 is pumped into the check valve 9
-2, and is supplied to the pressure tank 6 through connection pipes 12-1 and 12-2. Moreover, the connection pipe 12-1 communicates with the connection pipe 4-11 that connects the electric discharge valve 5 and the check valve 9-1 through the connection pipe 12-3. Note that the electric discharge valve 5 is always open, and the electric drain valve 11 and the electric test valve 15, which will be described later, are always closed. Moreover, the primary pressure regulating valve 10 is always in a state of regulating the pressure on the primary side of the valve to a specified pressure.

[0009] The sprinkler heads 3-1 to 3-n are attached to a branch pipe 13-1 communicating with the connecting pipe 4, and are placed in the middle of the pipe before reaching the sprinkler heads 3-1 to 3-n. A running water detection device 14 is provided. This running water detection device 14 is connected to one of the sprinkler heads 3-1 to 3-n.
If it opens at any point, water flowing in the branch pipe 13-1 is detected and an ON output is sent out. The ON output sent out by the running water detection device 14 is used as a fire alarm signal or the like. Furthermore, the flowing water detection device 14 also has a function as a check valve. On the other hand, in the middle of the branch pipe after reaching the sprinkler heads 3-1 to 3-n, an electric valve (
(hereinafter referred to as electric test valve) 15, and orifice 16
is provided. In addition, in this embodiment, only one branch pipe line 13-1 is shown, but a plurality of similar branch pipe lines are provided in communication with the connecting pipe line 4.
These branch pipes are similarly equipped with sprinkler heads, electric test valves, and the like.

Priming water for the fire pump 2 is stored in the priming water tank 8 . That is, the water stored in the priming tank 8 is supplied to the fire pump 2 as priming water through the check valve 9-3 and through the connecting pipe line 12-4. Water is supplied to the priming tank 8 through a water supply device 18. Further, a connecting pipe line 12-5 is provided to branch from the connecting pipe line 12-4,
A flow switch 17 is provided in the middle of the connecting pipe 12-5.

[0011] In the figure, meters indicated by numerals 19-1 to 19-6 are pressure gauges, and valves indicated by numerals 20-1 to 20-3 are manually operated valves. The valves 20-1 and 20-2 are normally open, and the valve 20-3 is normally closed.

FIG. 2 is a schematic block diagram of a control device that controls automatic inspection of fire extinguishing equipment in this system. This control device 100 includes a CPU 100-1, a RAM 1
00-2, ROM100-3, input interface 1
00-4, an output interface 100-5, and a pressure gauge 19- to the input interface 100-4.
Various types of information (pressure information, switch status information, current value information, rotation speed information, valve opening degree information, etc.) are provided from various sensors such as 1 to 19-6. Then, various commands are issued from the output interface 100-5 to various actuators such as the electric discharge valve 5, various devices such as the fire pump 2, etc. through processing by the CPU 100-1 according to a predetermined program. In FIG. 2, an electric discharge valve 5 is shown as a representative example of various actuators. In this case, the electric discharge valve 5 operates based on an output command from the control device 100.
Controlled via relay sequence 200. A backup power supply is provided to the relay sequence 200, and the operation of the relay sequence 200 is backed up in the event of a power outage of the commercial power supply normally used. In addition, the relay sequence 200 opens the electric discharge valve 5 through the normally closed contact 200-1 when the backup power supply is interrupted in addition to the commercial power supply, that is, performs a fail-safe operation and maintains the fire extinguishing equipment on the safe side. .

Next, the basic operation of the fire extinguishing equipment shown in FIG. 1 will be explained. Suppose now that a fire occurs and the sprinkler head 3-1 is activated. Then, the water stored in the pressure tank 6 flows through the connecting pipes 12-2, 12-
3. The water reaches the branch pipe 13-1 along the route of the connecting pipe 4, passes through the flowing water detection device 14, and is ejected from the sprinkler head 3-1. When the pressure inside the pressure tank 6 decreases with the ejection from the sprinkler head 3-1, the auxiliary pressure pump pressure switch 6-2 is turned on. When the auxiliary pressurizing pump pressure switch 6-2 is turned on, the auxiliary pressurizing pump 7 is activated to supply water to the pressure tank 6. If the pressure inside the pressure tank 6 decreases further because it cannot be covered by the operation of the auxiliary pressure pump 7, the fire pump pressure switch 6-1
turns on. When the fire pump pressure switch 6-1 is turned on, the fire pump 2 is activated to ensure water pressure from the sprinkler head 3-1 and to supply water to the pressure tank 6. When the water level in the pressure tank 6 rises, the pressure switch 6-2 for the auxiliary pressure pump turns off,
The operation of the auxiliary pressure pump 7 is stopped. Once the fire pump 2 is activated, the fire pump 2 continues its operation. The operation of the fire pump 2 can be stopped at any timing after the fire has been extinguished by manually operating a switch (not shown). During this time, the discharge pressure of the fire pump 2 is maintained at an appropriate value by the operation of the primary pressure regulating valve 10.

Next, a pump shut-off operation test that is periodically and automatically performed by the control device 100 in the fire extinguishing equipment that performs such basic operations will be explained with reference to the flowchart shown in FIG.

When a predetermined date and a predetermined time are reached, the control device 100 closes the electric discharge valve 5 and the primary pressure regulating valve 10.
A close command is output to (step 301). Thereby, the electric discharge valve 5 and the primary pressure regulating valve 10 operate in the closing direction. The control device 100 waits for the time required for the electric discharge valve 5 and the primary pressure regulating valve 10 to close, and then checks whether these valves are fully closed (step 30).
2). When the electric discharge valve 5 and the primary pressure regulating valve 10 are confirmed to be fully closed, it is determined that the discharge side of the fire pump 2 is closed, and a start command is output to the fire pump 2 (step 303). Then, the control device 100 confirms activation of the fire pump 2 (step 304), and performs a pump shut-off operation test (step 305).

In the pump shut-off operation test in step 305, it is confirmed by the flow switch 17 that a predetermined amount of water is drained through the connecting pipes 12-4 and 12-5, and the discharge pressure and suction pressure of the fire pump 2 are , current value, rotation speed, etc., to confirm whether or not the fire pump 2 exhibits a predetermined ability. After confirming that the fire pump 2 is normal through this pump shut-off operation test, the fire pump 2
A stop command is output to (step 306). Then, the control device 100 confirms that the fire pump 2 has stopped (step 307), and outputs an opening command to the electric discharge valve 5 and a command to return to the controlled state to the primary pressure regulating valve 10 (step 308).
). As a result, the electric discharge valve 5 operates in the opening direction, and the primary pressure regulating valve 10 operates in the controlled state direction. Control device 10
0 waits for the time required for the electric discharge valve 5 and the primary pressure regulating valve 10 to operate, checks whether these valves are in the open state (step 309), and performs a series of operations according to "Y". The process ends.

Note that the control device 100 performs step 305.
In the pump shut-off operation test in Open and output an alarm command. Further, when the control device 100 determines "N" in steps 302, 304, 307, and 309, it proceeds to steps 310, 311, 312, and 313, respectively, and performs abnormality processing. That is, step 3
10, 311, and 312, the electric discharge valve 5 and the primary pressure regulating valve 10 are returned to the open side, and an alarm command is output. In step 313, it is assumed that the electric discharge valve 5 or the primary pressure regulating valve 10 cannot be opened, and only an alarm command is output.

In the above description, the timing of opening both the electric discharge valve 5 and the primary pressure regulating valve 10 was not mentioned, but more precisely, the electric discharge valve is opened after the primary pressure regulating valve 10 is operated. Open 5. That is, during the pump shut-off operation test, the electric discharge valve 5 and the primary pressure regulating valve 1
0 is in a closed state, water pumped up by the fire pump 2 is supplied to the pressure tank 6 through the connecting pipes 12-3 and 12-2. For this reason, the water pressure in the pressure tank 6 increases,
If the electric discharge valve 5 is opened first, this high water pressure will be applied to the sprinkler heads 3-1 to 3-n, and there is a risk of damaging them. In order to avoid this, in this embodiment, the primary pressure regulating valve 10 is operated before the electric discharge valve 5, and the pressure inside the pressure tank 6 is activated during the response delay of the check mechanism in the check valve 9-1. The water is discharged in a reverse flow to reduce the water pressure when the electric discharge valve 5 is opened.

As explained above, according to this embodiment,
The electric discharge valve 5 is closed by remote control to put the discharge side of the fire pump 2 in a shut-off state, and then the fire pump 2 is started to automatically perform a pump shut-off operation test. Even if there are a large number of devices, inspection can be carried out easily and quickly. Furthermore, according to this embodiment, even if the commercial power supply fails, the operation of the electric discharge valve 5 is backed up by supplying backup power to the relay sequence 200, and the electric discharge valve 5 is kept fully open through the normally closed contact 200-1. In addition, the electric discharge valve 5 is returned to the fully open state in the event of an abnormality while checking its opening position, that is, the electric discharge valve 5 is always returned to the safe side in the event of an abnormality in preparation for the actual operation of the fire extinguishing equipment. As a result, the reliability of the discharge valve 5 can be improved and the discharge valve 5 can be changed from manual to electric.

[0020]

As is clear from the above explanation, according to the present invention, in the first invention, the discharge valve provided in the middle of the connecting pipe connecting the fire pump and the fire extinguishing head is, for example, an electric valve, and the discharge pressure is controlled. For example, a mechanism that can be closed by an electric signal is attached to the primary pressure regulating valve provided for adjustment, and the electric discharge valve and the primary pressure regulating valve are closed by remote control to shut off the discharge side of the fire pump, and then the fire is extinguished. Since the pumps are started and the pump shut-off operation test is performed, even if there are a large number of fire pumps to be inspected, the inspections can be carried out easily and in a short time. In addition, in the second invention, in the first invention, when the pump shut-off operation test is completed, the primary pressure regulating valve is operated and then the discharge valve is opened by remote control. This makes it possible to release the high water pressure in the pressure tank to lower water pressure before the discharge valve is opened, and it becomes possible to eliminate the adverse effects of high water pressure that would occur when the discharge valve is opened first.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram showing an embodiment of fire extinguishing equipment including an automatic inspection device according to the present invention.

FIG. 2 is a schematic block configuration diagram of a control device that controls automatic inspection of fire extinguishing equipment in this system.

FIG. 3 is a flowchart for explaining a pump shut-off operation test that is periodically and automatically performed by this control device.

[Explanation of symbols]

2 Fire pump 3-1 to 3-n Sprinkler head 4
Connection pipe line 5 Electric discharge valve 10 Primary pressure regulating valve 100 Control device

Claims (2)

[Claims] 1. An automatic inspection device for fire extinguishing equipment capable of periodically automatically inspecting the fire extinguishing equipment based on various information from various sensors arranged in the fire extinguishing equipment, comprising: a connecting pipe connecting a fire pump and a fire extinguishing head; A discharge valve provided in the middle of the road and a primary pressure regulating valve provided for adjusting the discharge pressure are closed by remote control, the discharge side of the fire pump is closed, and the fire pump is started. An automatic inspection device for fire extinguishing equipment characterized by being equipped with an automatic test means for performing a pump shut-off operation test. 2. The automatic inspection device for fire extinguishing equipment according to claim 1, wherein upon completion of the pump shut-off operation test, the primary pressure regulating valve is operated and then the discharge valve is opened by remote control.