JPH078569A - Foam extinguishing equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a foam extinguishing system capable of reliably performing initial fire extinguishing with a simple configuration without using a dry valve equipped with an accelerator having a complicated structure. A foam is radiated through a foam head 83 by actuation of a fast-moving sprinkler head 84 for fire detection. When the fast-acting sprinkler head 84, which has a quicker response than the standard sprinkler head, is activated, the valve of the simultaneous opening valve 82 opens, the pressure of the compressed air on the secondary side of the water flow detection device 60 decreases, and the pressure switch PS2 operates. When activated, the water flow detector 60 opens and bubbles are emitted through the bubble head 83.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam extinguishing system for detecting a fire by a closed sprinkler head and discharging a mixed solution of water for extinguishing water and a foam concentrate through the foam head, particularly in a parking lot in a cold region. The present invention relates to a dry foam extinguishing facility used for extinguishing a fire.

[0002]

2. Description of the Related Art Conventionally, in this type of dry foam fire extinguishing equipment, as shown in FIG. 8, after the closed type sprinkler head 6 for detecting a fire is activated, the time until foaming from the foam head 7 is initially extinguished. Must be performed within a predetermined time in order to ensure that the dry valve 3 has a large inner volume, the accelerator 12 is attached to the dry valve 3 so as to be suitable even when the internal volume of the pipe 4 on the secondary side of the dry valve 3 is large. A dry type valve 3 to which a valve called as is added is used.

That is, a dry valve 3 is provided in a pipe 2 following a mixer 1 for mixing a foaming stock solution and water for extinguishing water, and normally, the pipes 2 up to the dry valve 3 are pressurized and filled with an aqueous solution. Then, a simultaneous opening valve 5 is provided in a pipe 4 that branches from the dry valve 3 for each warning area, and a pipe 9 for the foam head 7 in an open state is connected to the secondary side of the simultaneous opening valve 5. At the same time, the detection pipe 8 to which the closed standard sprinkler head 6 for fire detection is connected is connected. In the normal state, the compressed air is filled in the pipe 4 from the dry valve 3 to the simultaneous open valve 5 and the sensing pipe 8.

In such a structure, when a fire occurs in the warning area and the standard sprinkler head 6 for detecting fire is activated and opened, the compressed air in the detecting pipe 8 escapes and the pressure in the pipe decreases. When the valve of the simultaneous open valve 5 opens due to this pressure decrease, the compressed air in the pipe 4 from the dry valve 3 to the simultaneous open valve 5 escapes to reduce the pressure, and the dry valve 3 opens. When the dry type valve 3 is opened, the water pressure on the primary side drops, and when the pressure switch of the air tank is activated, the fire extinguishing pump 11 is activated and the aqueous solution in which the foam stock solution and the fire extinguishing water are mixed is foamed via the foam head 7. .

In such a foam extinguishing system, the accelerator 12 is provided so that the time from the actuation of the closed standard sprinkler head 6 to the foaming of the foam head 7 is performed within a predetermined time. It is configured to mechanically detect the pressure reduction per unit time in the secondary side pipe of the dry valve 3 and open the dry valve 3 within a predetermined time.

[0006]

However, in the conventional foam fire extinguishing equipment using the accelerator 12, the structure of the dry valve 3 with the accelerator 12 added is complicated, so that the cost is high and maintenance work is troublesome. There is a problem. The present invention has been made in view of such conventional problems, and an object thereof is to provide a foam fire extinguishing system capable of reliably extinguishing a fire with a simple configuration without using a dry valve having a complicated structure.

[0007]

To achieve this object, the foam extinguishing system of the present invention is constructed as follows. First, the present invention is directed to a foam extinguishing facility that discharges, through a foam head, an aqueous solution in which a fire extinguishing water supplied by a pump and a foam stock solution are mixed. With regard to such a foam extinguishing facility, the present invention is a pressure reducing open type simultaneous opening valve in which a foam head is connected to the secondary side, and the primary side and the sensing pipe are filled with compressed air in a normally monitored state to close the valve. And a quick-acting sprinkler head for fire detection, which is connected to the detection pipe and operates when a fire is detected to reduce the compressed air pressure in the detection pipe to open the valve of the simultaneous release valve. The primary side of the simultaneous release valve is connected, and the pressure of compressed air on the secondary side of the running water detection device and the secondary side of the running water detection device has dropped below a predetermined value. And a control panel for opening the water flow detection device when the pressure switch is activated.

Further, the foam fire extinguishing equipment of the present invention is a decompression open type in which a foam head is connected to the secondary side and compressed air is filled in the primary side and the first sensing pipe under normal monitoring condition to close the valve. A standard for fire detection, which is connected to the simultaneous release valve and the first detection pipe and operates when a fire is detected to reduce the compressed air pressure in the first detection pipe to open the valve of the simultaneous release valve. Type sprinkler head and the second sensing pipe filled with compressed air in the normal monitoring state, which is connected to the primary side pipe of the simultaneous release valve. A fast-acting sprinkler head for detecting fire that reduces the compressed air pressure in the pipe, and the primary side of the simultaneous release valve is connected to the secondary side, and the primary side is filled with a pressurized aqueous solution for fire extinguishing under normal monitoring conditions. Detection device and secondary side compression of water flow detection device Pressure of the gas is characterized by providing a pressure switch for detecting that falls below a predetermined value, and a control panel to open the water flow detection device when the pressure switch is actuated.

Here, air is passed between the connecting portion of the pipe for the primary side of the simultaneous release valve of the second sensing pipe and the interlocking type sprinkler head which is connected to the closest portion of this connecting portion to pass the pressurized water. A valve that shuts off the solution may be provided. Further, a pneumatic actuator may be added that opens the flowing water detection device when the pressure of the compressed air on the secondary side of the flowing water detection device reaches a predetermined pressure lower than the operating pressure of the pressure switch.

[0010]

In the present invention, when the fast-moving sprinkler head, which has a faster response than the standard sprinkler head, operates,
When the pressure of the compressed air on the primary side, that is, the secondary side of the water flow detection device decreases due to the simultaneous release valve opening, and the pressure switch is activated, the water flow detection device opens and the aqueous solution flows to the bubble head and bubbles are emitted. To be done. Therefore, since the fast-moving sprinkler head has a quick response, it is possible to surely perform the initial fire extinguishing in a time similar to the conventional one with a simple configuration without using a dry valve provided with an accelerator having a complicated structure.

Further, according to the present invention, when the fast-moving sprinkler head having a fast response is operated, only the primary side of the pressure-reducing open type simultaneous opening valve is opened, and the pressure of the compressed air on the secondary side of the flowing water detection device is lowered. However, when the pressure switch is activated, the flowing water detection device is opened, but the aqueous solution stops at the primary side of the pressure reduction open type simultaneous open valve. Then, when the standard sprinkler head, which has a slow response, is activated, the valve of the pressure-reducing open type simultaneous opening valve is opened to immediately emit bubbles. Therefore, the quick-acting sprinkler head has a fast response, and a standard sprinkler head that responds slowly even if there is a possibility of error movement can prevent malfunctions, and at the same time provide a dry valve equipped with an accelerator with a complicated structure. It is possible to surely carry out the initial fire extinction in a time similar to the conventional one with a simple structure without using it.

Further, in the present invention, since the pneumatic actuator for fail-safe is added to the flowing water detecting device, the fire can be surely extinguished even if the pressure switch or the electric system fails.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first type of dry foam extinguishing equipment according to the present invention.
An example is shown. In FIG. 1, the fire extinguishing pump 51 is configured to pressurize the fire extinguishing water from the water receiving tank 52 and supply it to the water supply main 54 through the sluice valve 53, and is started and stopped by the pump control panel 55. . Gate valve 53
A pressure tank 61 is branched and connected to the secondary side water supply main pipe 54 so that the internal pressure of the water supply main pipe 54 is always constant.

In addition, the foam stock solution tank 5 is provided in the main water supply pipe 54.
Mixer 5 for mixing foam stock solution from 6 and fire extinguishing water
7 is provided, and the mixed solution of the foaming liquid and the fire extinguishing water is supplied to the primary side of the running water detection device 60 described later through, for example, the primary pipe 59 serving as a branch pipe for each floor. Also, the fire pump 5
A water tank 63 is installed at a predetermined height near 1
The priming water supply pipe 6 from the priming tank 63 to the discharge side of the fire pump 51
4 is connected. This water tank 63 has a water level sensor 6
5 is provided, and the water level detection signal of the water level sensor 65 is applied to the pump control board 55 so that the pump control board 55 outputs a full water alarm and a low water alarm. Further, a test pipe 69 for flowing a rated flow rate in a pump performance test is branched and connected to the discharge side of the fire extinguishing pump 51, and the other end of the test pipe 69 is inserted into the water tank 52.

Further, the compressed air from the compressor 70 is supplied to the flowing water detecting device 60 through the air pipe 71, the air filter 72, the air dryer 73, and the regulator 74. A branch pipe 80 is connected to the secondary side of the running water detection device 60, and the branch pipe 80 connects the warning areas A and B.
It is connected to the primary side of the simultaneous release valve 82 via a pipe 81 that is branched for each, and is maintained at a pressure of, for example, 3 kg / m ² during normal monitoring.

A plurality of fire-extinguishing foam heads 83 and a fast-acting sprinkler head 84 for detecting fire are provided in each of the warning areas A and B.
Is installed, and the compressed air from the air pipe 71 is supplied to the sensing pipe 85 between the simultaneous opening valve 82 and the high-speed sprinkler head 84. A bubble head 83 is connected to the secondary side of the simultaneous release valve 82, and a rapid-action sprinkler head 84 is provided.
Is activated, and the compressed air in the sensing pipe 85 escapes to reduce the pressure, the valve is opened and communication is established between the primary side and the secondary side. Further, a manual start valve 86 is provided at the end of the sensing pipe 85 for the sprinkler head 84.

In FIG. 1, for the sprinkler head 84
Through the pipe different from the branch pipe 80 to the sensing pipe 85 of
Is shown to be supplied with compressed air, but the branch pipe
Supply through the simultaneous opening valve 82 connected to 80
If it is possible, this piping is unnecessary. Where fast
The dynamic sprinkler head 84 is
Originally designed for residential use in the United States to improve thermal sensitivity.
Developed as a wrinkler, 100 standard sprinklers
~ 400m^1/2S^1/2(= About 200-700ft^1/2s
ec ^1/2) Has a response time index (RTI) of
The speed type is 25-55m^1/2S^1/2(= About 50-10
0ft^1/2sec^1/2) Of the UL standard
It is listed up.

Next, with reference to FIGS.
The configuration of 0 will be described in detail. 2 and 3 functionally show the valve closed state and the valve opened state of the water flow detection device 60, respectively. Inside the main body 91, a priming chamber 93, a primary side chamber 94a, and a secondary side chamber 9 are provided by a clapper 92 which is a valve body.
4b, and the clapper 92 has a primary side chamber 94a.
Open and close the open end of. A spring 95, which is an elastic body, is provided in the priming chamber 93.
Are pressed in the direction of the open end of the primary side chamber 94a.

In the normal monitoring state, the primary side chamber 94a connected to the primary pipe 59 is filled with the fire-extinguishing aqueous solution, and the priming chamber 93 is also filled with the pressurized aqueous solution, so that the pressure before and after the clapper 92 is the same. Although the pressurized aqueous solution is applied, the area difference before and after the clapper 92 (primary side 1: priming chamber side 2)
The clapper 92 is maintained in the closed state by the urging force of the spring 95.

A check valve 96 is connected to the upper part of the main body 91, and a checker 97 is provided on the check valve 96. A secondary side of the check valve 96 is connected to the branch pipe 80 to which the foam head 83 is connected, and a partition valve 98 is attached to a connecting portion between the check valve 96 and the branch pipe 80. An air pipe 71 for supplying compressed air is connected above the clapper 97 in the check valve 96, and compressed air flows into the check valve 96 and the branch pipe 80 ahead of the clapper 97 in the normal monitoring state. Since the inside of the secondary side chamber 94b is filled with the atmospheric pressure, the clapper 97 is maintained in the closed state.

The air pipe 71 is provided with a control valve 75, a flow rate adjusting valve 76 with an orifice mechanism, and a check valve 77. The flow rate adjusting valve 76 is normally closed, but the valve body has a diameter of φ2. A small hole is formed, and compressed air is supplied from the hole. Further, at the time of restoration, by opening the flow rate adjusting valve 76, compressed air can be quickly supplied to the check valve 96.

A drain pipe 99 is also connected to the check valve 96, and the drain pipe 99 is provided with a pressure gauge 100, two pressure switches PS1 and PS2, and a system drain valve 102. As will be described later, the pressure switches PS1 and PS2 detect pressure reduction due to leakage of compressed air filled in the branch pipe 80 due to breakage of the pipe and pressure reduction due to operation of the sprinkler head 84. For example, when the compressed air pressure of the branch pipe 80 is 3 kg / cm ² , each 2 kg / cm
² , a pressure drop signal is sent to the control panel 87 when the pressure drops to 1 kg / cm ² .

When a parent-child valve is used as the system drain valve 102, the running water test can be conducted without flowing the aqueous solution through the foam head 83. In this case, the valve body 92 is opened by an operation such as opening the manual opening valve 111 with the partition valve 98 closed, and the fire pump 5 is activated by the starting pressure switch that is activated by the pressure reduction in the primary side pipe of the main body 91.
1 is started and the flow rate for one foam head 83 is flowed.

One end of the priming pipe 103 is connected to the priming chamber 93, and the other end of the priming pipe 103 is connected to the primary pipe 59. The pressurized aqueous solution in the primary pipe 59 is a normally open priming valve 104, strainer 105, check valve 106,
The water is supplied to the priming chamber 93 via the orifice 107 and the pressure gauge 108. Orifice 107 of priming pipe 103
The starting pipe 109 is also connected to the side, and the starting pipe 1
09 is connected to the drainage pipe through an electric valve (starting valve) 110 that opens and closes in response to an opening / closing signal from the control panel 87. Further, a manual opening valve 111 is provided in parallel with the motor-operated valve 110 in the start-up pipe 109, and the opening of the orifice 107 is set to a value when the motor-operated valve 110 is opened from the inflow amount from the priming pipe 103 into the priming chamber 93. It is set to increase the amount of drainage.

Therefore, when the motor-operated valve 110 is opened, the pressure in the priming chamber 93 decreases, and when the pressure of the pressurized aqueous solution in the primary chamber 94a exceeds the biasing force of the spring 95, as shown in FIG. The clapper 92 opens immediately. When the motor-operated valve 110 is closed, the priming valve 104 and the orifice 107 are closed.
When the pressurized aqueous solution is gradually accumulated in the priming chamber 93 and the pressure in the priming chamber 93 becomes equal to the pressure in the primary chamber 94a, the clapper 92 is acted upon by the difference in area between the front and rear of the clapper 92 and the urging force of the spring 95. Gradually close. The check valve 106 sets only the flow of pressurized water to the priming chamber 93 to prevent backflow, and the pressure gauge 108 is used to measure the pressure of the pressurized water flowing through the priming water pipe 103.

One end of the water flow warning pipe 112 is connected to the secondary chamber 94 of the main body 91, and the other end of the water flow warning pipe 112 is connected to the drainage pipe. The water flow warning pipe 112 is provided with an auxiliary drain valve 113, a strainer 114, a check valve 115, a pressure switch PS3, and an orifice 117. When the clapper 92 is opened, the pressure switch PS3 detects whether or not the pressure of the pressurized water flowing from the secondary side chamber 94 into the flowing water alarm pipe 112 has reached a predetermined value, and outputs a flowing water alarm signal to the control panel 87. . Orifice 117
The opening degree of the pressure switch PS3 when the clapper 92 is opened.
Is set so that a sufficient flow rate can be supplied to turn on the pressure switch PS3 and that the pressure switch PS3 has a sufficient drainage amount to turn off instantly when the clapper 92 is closed.

Here, the orifice 117 may be provided by branching a drain line from an appropriate place of the flowing water alarm pipe 112, and a valve seat leakage occurs in the main body 91 to cause a secondary side chamber 94.
When water leaks to b, the water is discharged to the drain line via the orifice 117. Also, the water flow warning pipe 112
The alarm test valve 119 is provided in the test pipe 118 that connects the
The pressure switch PS3 is tested by opening 9.

The structure of such a water flow detecting device 60 is shown in FIG.
Further description will be made with reference to. The body 121 constitutes a part of the body 91 of FIG. 3, and the opening of the body 121 is closed by a cover 122 with a bolt 123. A diaphragm 124 is sandwiched between the cover 122 and the body 121, and the clamp ring 125 and the screw bolt 1
26 connects the clapper 92 to the diaphragm 124,
It is fixed. The clapper 92 is supported so as to be seated on the valve seat 127 provided in the opening of the primary side chamber 94a to form a priming chamber 93. The spring 95 presses the clapper 92 against the opening of the primary side chamber 94a. When the clapper 92 is opened and the primary side chamber 94a and the secondary side chamber 94b communicate with each other, the aqueous solution in the primary side chamber 9a
It flows to 4.

Next, the operation of the first embodiment will be described with reference to FIG. When a fire occurs (step S1), heat activates the fast-moving sprinkler head 84 for fire detection (step S2), or when the manual start valve 86 is opened (step S3), compression in the detection pipe 85 is performed. Air leaks to the outside, whereby the pressure-reducing open type simultaneous open valve 82 is opened (step S4). Here, since the fast-moving sprinkler head 84 is used as the fire detection sprinkler head, it is possible to detect the fire earlier than when a standard sprinkler head is used to detect the fire.

Then, the compressed air in the branch pipe 80 on the primary side of the simultaneous release valve 82 leaks to the outside through the simultaneous open valve 82 and the foam head 83, and the pressure decrease causes the pressure reducing alarm pressure switch PS1 to operate. (Step S5), then the activation pressure switch PS2 is activated (Step S5).
6) The motor-operated valve 110 is controlled to open (step S
7), the valve opens (step S8).

Then, when the valve is opened, the pressure switch PS3 for flowing water alarm is operated (step S9), and the aqueous solution in which the foaming stock solution and the fire extinguishing water are mixed is radiated through the foam head 83 by flowing water to the branch pipe 80. Together with (step S1
0, S11), the pressure in the main water supply pipe 54 is reduced by this foam emission, and the pump 51 is started when the pressure switch PS4 of the pressure tank 61 is activated (steps S12 to S1).
4), continuous foam emission is performed to extinguish the fire (steps S15 and S16).

Therefore, according to the above-mentioned embodiment, a fast-moving sprinkler head for fire detection is used,
When a fire occurs, it can be detected earlier than when a standard sprinkler head is used, so it is possible to reliably perform initial fire extinction in the same amount of time as before without using an accelerator. Therefore, initial fire extinguishing can be reliably performed with a simple configuration without using a dry valve having an accelerator having a complicated structure.

Next, a second embodiment will be described with reference to FIG. In the first embodiment, only the fast-moving sprinkler head 84 is used to speed up the response.
In this embodiment, the pressure-reducing open type simultaneous open valve 82a, the fast-acting sprinkler head 84 and the floating valve (or auto drip) 85b for guiding the pressurized aqueous solution to the primary side of the simultaneous open valve 82a when a fire is detected. And then the standard sprinkler 8 for opening the simultaneous opening valve 82a.
4a is used to accelerate bubble emission and prevent malfunction when only the fast-moving sprinkler head 84 is used.

That is, when the compressed air in the second sensing pipe 85a connected to the primary pipe of the pressure-reducing open type simultaneous opening valve 82a is decompressed by the operation release of the connected fast-acting sprinkler head 84, The compressed air on the primary side leaks to the outside through the floating valve 85b, and then the pressurized aqueous solution flowing therein stops at the floating valve 85b. When the compressed air in the first sensing pipe 85 connected to the simultaneous opening valve 82a is decompressed by the operation opening of the connected standard type sprinkler head 84a, the primary side and the secondary side of the simultaneous opening valve are configured to communicate with each other. Has been done.

Therefore, when a fire occurs, the fast-acting sprinkler head 84 becomes the standard sprinkler head 84a.
Since it operates earlier, the compressed air in the branch pipe 80 on the primary side of the simultaneous opening valve 82a leaks to the outside through the second sensing pipe 85a and the sprinkler head 84. Next, as in the first embodiment, when the pressure reducing alarm pressure switch PS1 is activated and then the valve starting pressure switch PS2 is activated,
The clapper 92 with the flowing water detecting device is opened, and the pressure water flows through the branch pipe 80 to the primary side of the simultaneous opening valve 82a.

When the standard type sprinkler head 84a operates in this state, the compressed air in the first sensing pipe 85 leaks to the outside, and the simultaneous open valve 82 opens.
At this time, since the aqueous solution has already flowed to the primary side of the simultaneous release valve 82a, the initial fire extinguishing can be performed immediately. According to this structure, the high-speed sprinkler head 84
If it is accidentally activated or broken by something, it is safe because no bubbles are emitted unless the standard sprinkler head 84a is activated.

FIG. 7 shows a modification of the second embodiment.
Pneumatic actuator 85c for the embodiment of
Has been added. The pneumatic actuator 85c includes a drainage pipe 99 connected to a branch pipe 80 in the flowing water detection device 60 shown in FIGS.
When the pressure in the branch pipe 80 reaches, for example, 0.5 Kg / cm ² , the pneumatic actuator 85c operates and is connected to the starting pipe 109 for depressurizing the inside.
By depressurizing the inside of 3 and opening the flowing water detection device 60, it is possible to surely extinguish the fire even if the pressure switch PS2, the electric system or the like fails.

[0038]

As described above, according to the present invention, when the fast-acting sprinkler head, which has a faster response than the standard sprinkler head, operates, the valve of the simultaneous opening valve opens and the primary side, that is, the water flow detecting device. When the pressure of the compressed air on the secondary side drops and the pressure switch is activated, the water flow detection device opens, the aqueous solution flows to the foam head, and the foam is radiated. Without using a dry valve equipped with a complicated accelerator, it is possible to reliably perform initial fire extinguishing in a time similar to the conventional one with a simple configuration.

Further, when the fast-acting sprinkler head having a fast response is operated, only the primary side of the pressure-reducing open type simultaneous opening valve is opened, and the pressure of the compressed air on the secondary side of the flowing water detection device is lowered, and When the switch is activated, the water flow detection device opens, but the aqueous solution stops at the primary side of the pressure reduction open type simultaneous release valve, and when the standard sprinkler head, which responds slowly, operates subsequently, the pressure reduction open type simultaneous release valve operates. Since the valve opens and the bubbles are immediately emitted, the fast-moving sprinkler head has a fast response, and even if there is a possibility of error movement, the standard sprinkler head with a slow response can prevent malfunction and the structure is complicated. Without using a dry valve equipped with an accelerator, it is possible to surely perform initial fire extinguishing in a time similar to the conventional one with a simple configuration.

Further, by providing a fail-safe pneumatic actuator in the flowing water detection device, even if the pressure switch or the electric system fails, the fire can be surely extinguished.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a foam extinguishing facility according to the present invention.

FIG. 2 is an explanatory view functionally showing a valve closed state of the water flow detection device of FIG.

3 is an explanatory view functionally showing a valve open state of the water flow detection device of FIG.

FIG. 4 is a cross-sectional view showing the running water detection device of FIG.

FIG. 5 is a flowchart for explaining the operation of the foam extinguishing equipment of FIG.

FIG. 6 is a configuration diagram showing a foam extinguishing facility according to a second embodiment.

FIG. 7 is a configuration diagram showing a modified example of the foam extinguishing equipment of the second embodiment.

FIG. 8 is an explanatory diagram showing the configuration and operation of a conventional foam extinguishing facility.

[Explanation of symbols]

 P1 to P4: Pressure switch 51: Fire extinguishing pump 52: Water receiving tank 53: Partition valve 54: Water supply main 55: Pump control panel 56: Foam stock solution tank 57: Mixer 59: Primary piping 60: Flow water detector 61: Pressure tank 63: Water tank 64: Water supply pipe 65: Water level sensor 70: Compressor 71: Air piping 72: Air filter 73: Air dryer 74: Regulator 80: Branch pipe 81: Piping 82, 82a: Simultaneous open valve 83: Bubble head 84 : High-speed sprinkler head 84a: Standard sprinkler head 85, 85a: Piping for detection 85b: Floating valve (or auto drip) 85c: Pneumatic actuator 86: Manual start valve 87: Control panel 88: Fire alarm receiver 91 : Main body 92: Clapper (valve body) 93: Priming chamber 94a: Primary side chamber 94b: Second Side chamber 95: Spring (elastic body) 96: Check valve 97: Clapper 98: Gate valve 99: Drainage pipe 100: Pressure gauge 102: System drainage valve 103: Priming water pipe 104: Priming valve 105: Strainer 106: Check valve 107 : Orifice 108: Pressure gauge 109: Piping for starting 110: Motorized valve (starting valve) 111: Manual opening valve 112: Flowing water warning piping 113: Auxiliary drain valve 114: Strainer 115: Check valve 117: Orifice 118: Test piping 119 : Alarm test valve 121: Body 122: Cover 123: Bolt 124: Diaphragm 125: Clamp ring 126: Screw bolt 127: Valve seat

Claims (4)

[Claims] 1. A foam fire extinguishing device for discharging an aqueous solution of a foam stock solution supplied by a fire extinguisher mixed with a foam stock solution through a foam head, wherein the foam head is connected to a secondary side, and a primary side and a sensing side are connected. A pressure reducing open type simultaneous open valve in which the pipe is normally filled with compressed air and the valve is closed under normal monitoring conditions, and it is connected to the sensing pipe and operates when a fire is detected to reduce the compressed air pressure in the sensing pipe. A quick-acting sprinkler head for fire detection that opens the valve of the simultaneous opening valve and the primary side of the simultaneous opening valve is connected to the secondary side, and the primary side is filled with pressurized aqueous solution for fire extinguishing under normal monitoring condition. A flowing water detecting device, a pressure switch for detecting that the pressure of the compressed air on the secondary side of the flowing water detecting device has dropped below a predetermined value, and the flowing water detecting device when the pressure switch operates. Open Foam fire extinguishing equipment which is characterized in that it has a control panel. 2. A foam fire extinguishing facility for discharging an aqueous solution, which is a mixture of a fire extinguishing water supplied by a fire extinguishing pump and a foam concentrate, through a foam head, wherein the foam head is connected to a secondary side, and a primary side and a first side are connected. A pressure reducing open type simultaneous open valve in which compressed air is filled in the sensing pipe under normal monitoring conditions and the valve is closed; and a first sensing pipe that is connected to the first sensing pipe and operates when a fire is detected. Standard sprinkler head for fire detection that lowers the compressed air pressure in the piping for open the valve of the simultaneous release valve and compressed air in the normal monitoring state connected to the primary side pipe of the simultaneous release valve. A fast-acting sprinkler head for fire detection, which is connected to the filled second detection pipe and operates when a fire is detected to reduce the compressed air pressure of the pipe on the primary side of the simultaneous release valve, and a secondary side The primary side of the simultaneous release valve is connected And a running water detection device in which the primary side is filled with a pressurized aqueous solution for fire extinguishing in a normal monitoring state, and for detecting that the pressure of the compressed air on the secondary side of the running water detection device has dropped below a predetermined value. A foam fire extinguishing facility comprising: a pressure switch; and a control panel that opens the running water detection device when the pressure switch is activated. 3. The foam fire extinguishing facility according to claim 2, wherein the second sensing pipe is connected to a connection part of the pipe on the primary side of the simultaneous release valve, and an interlocking type connected to the connection part closest to the connection part. A foam fire extinguisher equipped with a valve for passing air and shutting off pressurized aqueous solution between the sprinkler head and the sprinkler head. 4. The foam fire extinguishing equipment according to claim 1 or 2, wherein the pressure of the compressed air on the secondary side of the flowing water detection device becomes a predetermined pressure lower than the operating pressure of the pressure switch. A foam extinguishing system characterized by the addition of a pneumatic actuator that opens.