JPH04285574A - Automatic inspection device for fire extinguishing facility - Google Patents

Abstract

PURPOSE:To make the operation test of an aux. pressurization pump during tests on a pressure tank without involving troublesome procedure, as well as perform this operation test simply and shortly. CONSTITUTION:A motor-driven valve is used for a water exhaust valve 11 to be furnished on a pressure tank 6. This valve 11 is opened by remote operation for performing automatic start check of an aux. pressurizing pump 7 associate with turning-on of a pressure switch 6-2 for aux. pressurizing pump actuated by pressure sink in the tank 6, which shall be followed by automatic start check of a fire extinguishing pump concerned 2 associated with turning-on of another pressure switch 6-1 provided therefore as actuated by a further pressure sink in the tank 6.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] 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 arranged in the fire extinguishing equipment. This invention relates to an automatic inspection device for fire extinguishing equipment that checks the startup of pumps.

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 functional inspection items is a pressure tank test. In this pressure tank test, the drain valve attached to the pressure tank was manually opened to create a pressure drop in the pressure tank as the water level fell, and the fire pump pressure switch (as referred to in the present invention) as a water pressure opening/closing device for startup was used. activating the second pressure switch means). Then, the activation of the fire pump due to the activation of the pressure switch for the fire pump is confirmed, and the pressure value at that time is confirmed with the pressure gauge attached to the pressure tank. On the other hand, an auxiliary pressurizing pump is attached to the pressure tank, and activation of this auxiliary pressurizing pump can be confirmed in the same manner as the above-mentioned pressure tank test. That is, by manually opening the drain valve attached to the pressure tank, a pressure drop is caused in the pressure tank as the water level drops, and a pressure switch for the auxiliary pressurizing pump (as referred to in the present invention) is used as a device to prevent natural pressure drop. Pressure switch means (1) is activated. In this case, the pressure switch for the auxiliary pressurizing pump operates at a higher pressure side than the pressure switch for the fire pump. Then, it is confirmed that the auxiliary pressurizing pump is started due to the operation of the auxiliary pressurizing pump pressure switch, and the pressure value at that time is confirmed using a pressure gauge attached to the pressure tank.

0003

[Problems to be Solved by the Invention] However, in the past, when testing the pressure tank or the operation of the auxiliary pressurizing pump, the drain valves had to be manually opened one by one, and the drain valves had to be opened after the test was completed. The problem is that they must be closed one by one manually, which is extremely time-consuming and labor-intensive when there are many pressure tanks, fire pumps, and auxiliary pressure pumps to be inspected.

0004

[Means for Solving the Problems] The present invention has been proposed in order to solve the above problems, and the drain valve attached to the pressure tank is, for example, an electric valve, and the electric drain valve can be opened by remote control. , the first due to the pressure drop in the pressure tank.
The activation of the auxiliary pressurizing pump is automatically confirmed when the pressure switch means is activated, and the activation of the fire extinguishing pump is automatically checked when the second pressure switch means is activated due to further pressure drop in the pressure tank. It is something.

[0005]

Therefore, according to the present invention, after the drain valve is opened by remote control, the activation of the auxiliary pressurizing pump is automatically checked, and subsequently the activation of the fire extinguishing pump is automatically checked.

[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 is provided with a fire pump pressure switch 6-1 as a second pressure switch means and an auxiliary pressure pump pressure switch 6-2 as a first pressure switch means. An electric drain valve 11 is provided to discharge the water. The auxiliary pressure pump 7 pumps water in the water tank 1 through the suction pipe 7-2 via the foot valve 7-1. The water pumped by this auxiliary pressure pump 7 is
It is supplied to the pressure tank 6 through the connecting pipes 12-1 and 12-2 via the check valve 9-2. In addition, the connection pipe 12-1 connects the electric discharge valve 5 and the check valve 9-1 through the connection pipe 12-3 to the connection pipe 4-11.
is connected to. 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, through the processing of the CPU 100-1 according to a predetermined program, the output interface 100 is sent to various actuators such as the electric drain valve 11, various devices such as the fire pump 2, and the auxiliary pressure pump 7.
Various commands are issued from -5.

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 pressure tank test that is periodically and automatically performed by the control device 100 in a 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 outputs a close command to the electric discharge valve 5 and an open command to the electric drain valve 11 (step 301). As a result, the electric discharge valve 5 is closed,
Electric drain valve 11 is opened. By opening the electric drain valve 11, the pressure in the pressure tank 6 decreases, and at timing t1 shown in FIG. 4, the auxiliary pressure pump pressure switch 6 is opened.
-2 is turned on. The control device 100 confirms that the auxiliary pressurizing pump pressure switch 6-2 is turned on, and confirms whether the auxiliary pressurizing pump 7 has started within a predetermined time after outputting this starting command (step 302). After confirming that the auxiliary pressure pump 7 has started, the process proceeds to step 303. Step 30
In step 3, the water pressure (starting pressure) in the pressure tank 6 at the time when the auxiliary pressurizing pump 7 is started is confirmed, and if this starting pressure is within predetermined upper and lower limits, the process proceeds to step 304.

When the water level in the pressure tank 6 further decreases, the fire pump pressure switch 6-1 is turned on at timing t2 shown in FIG. The control device 100 checks whether the fire pump pressure switch 6-1 is turned on, checks whether the fire pump 2 has been started within a predetermined time after outputting this start command (step 304), and turns on the fire pump 2. After confirming the startup, the process advances to step 305. In step 305, the water pressure (starting pressure) in the pressure tank 6 at the time when the fire pump 2 is started is checked, and if this starting pressure is within the predetermined upper and lower limits, the process proceeds to step 306 and the electric drain valve 11 is activated. Outputs a close command to the

[0017] As a result, the electric drain valve 11 is closed.
The water level in the pressure tank 6 begins to rise. When the pressure inside the pressure tank 6 increases, at timing t3 shown in FIG.
The auxiliary pressure pump pressure switch 6-2 is turned off. The control device 100 controls the pressure switch 6 for this auxiliary pressure pump.
-2 is turned off, it is checked whether the auxiliary pressurizing pump 7 has stopped within a predetermined time after this stop command is output (step 307), and when it is confirmed that the auxiliary pressurizing pump 7 has stopped, the process proceeds to step 308. move on. In step 308, the water pressure (stop pressure) in the pressure tank 6 at the time when the auxiliary pressure pump 7 stops is checked, and if the stop pressure is within predetermined upper and lower limits, the process proceeds to step 309. In step 309, a stop command is output to the fire pump 2, and an open command is output to the electric discharge valve 5. As a result, the fire pump 2 stops, the electric discharge valve 5 returns to the open state, and the series of processes ends.

Note that steps 302, 303, 304,
If "N" is determined in steps 305, 307, and 308, the process proceeds to step 310, and the electric discharge valves 5,
The electric drain valve 11, auxiliary pressure pump 7, and fire pump 2 are returned to their pre-test state, and an alarm command is output.

[0019]

Effects of the Invention As is clear from the above explanation, according to the present invention, the drain valve attached to the pressure tank is, for example, an electric valve, and the electric drain valve is opened by remote control, thereby reducing the pressure drop in the pressure tank. The activation of the auxiliary pressure pump is automatically confirmed when the first switch means is activated, and the fire pump is automatically activated when the second switch is activated due to further pressure drop in the pressure tank. Therefore, it is now possible to test the operation of the auxiliary pressurizing pump during the pressure tank test without any hassle, and there are many pressure tanks, fire pumps, and auxiliary pressurizing pumps to be inspected. The test can now be performed easily and quickly.

[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 pressure tank test that is periodically and automatically performed by this control device.

FIG. 4 is a diagram showing the relationship between the tank pressure and the operation timing of the fire pump pressure switch and the auxiliary pressure pump pressure switch during this pressure tank test.

[Explanation of symbols]

2 Fire pump 6 Pressure tank 6-1 Fire pump pressure switch 6-2
Auxiliary pressure pump pressure switch 7 Auxiliary pressure pump 11 Electric drain valve 100 Control device

Claims (1)

[Claims] 1. An automatic inspection device for fire extinguishing equipment that can periodically automatically inspect the fire extinguishing equipment based on various information from various sensors arranged in the fire extinguishing equipment, the equipment remotely checking the drain valve attached to a pressure tank. It is opened by operation, and the activation of the auxiliary pressurizing pump is confirmed when the first pressure switch means is activated due to a pressure drop in the pressure tank, and the second pressure switch means is activated due to a further drop in the water level in the pressure tank. An automatic inspection device for fire extinguishing equipment, characterized in that it is equipped with an automatic test means for confirming the activation of a fire extinguishing pump.