JP2005000508A - Fire extinguishing equipment using a decompression type simultaneous open valve - Google Patents

Abstract

Disclosed is a fire extinguishing facility that uses a highly reliable decompression-release type simultaneous release valve that can prevent malfunction and rupture due to freezing of water in a pipe even in winter and cold regions.
A bypass pipe 17 for communicating a secondary side chamber 2 of a valve box 1 and a cylinder chamber 7 is provided, and a normally closed electric valve 18 is provided in the middle of the bypass pipe 17. Normally, the secondary side chamber 3 is closed at atmospheric pressure, and when the electric valve 18 is opened by the operation of the fire detector 19 and the pressure in the cylinder chamber 7 decreases, the valve body 5 is opened and the primary side chamber 2 is opened. As the fire extinguishing liquid flows into the secondary side chamber 3 through the communication hole 4, the inside of the secondary side pipe 16 is brought into a pressurized and charged state. Thereafter, the heat-sensitive part of the closed sprinkler head attached to the secondary side pipe 16 is melted by the heat generated in the event of a fire, and the fire extinguishing liquid is discharged from the sprinkler head.
[Selection] Figure 1

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a foam fire-extinguishing equipment and a water spray fire-extinguishing equipment using a decompression open type simultaneous open valve.
[0002]
[Prior art]
A decompression release type simultaneous release valve used in this type of fire extinguishing equipment is formed with a primary side chamber and a secondary side chamber sandwiching a communication hole inside a valve box, and a valve body for opening and closing the communication hole is built in. A cylinder chamber (or piston chamber) is provided above the valve body in the primary side chamber, and a piston having a larger pressure receiving area than the valve body is provided in the cylinder chamber, and the valve body is normally used as a valve seat by the primary side pressure. The communication hole is held down and held in a closed state. The cylinder chamber is connected to a fire detection line, and when the fire detection line is depressurized by the operation of a sensing head attached to the fire detection line, the pressure in the cylinder chamber decreases, thereby opening the valve body, A fire extinguishing liquid flows from the primary side chamber to the secondary side chamber (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
JP 2002-320687 A (
[Prior Art] column, FIG. 6)
[0004]
[Problems to be solved by the invention]
However, since the piping of the fire detection line of the above-mentioned decompression release type simultaneous release valve is filled with water, the water in the piping of the fire detection line freezes in the foam fire extinguishing equipment etc. of the parking lot in winter and cold areas. In the event of a fire, effective fire extinguishing may not be possible, and piping may burst due to freezing and expansion.
[0005]
The present invention has been made to solve such problems, and the object of the present invention is reliability that can prevent malfunctions and ruptures due to freezing of water in the piping even in winter and in cold regions. An object of the present invention is to provide a fire extinguishing equipment that uses a high pressure reduction open type simultaneous open valve.
[0006]
[Means for Solving the Problems]
In the invention according to claim 1 of the present invention, a primary side chamber and a secondary side chamber are formed inside a valve box with a communication hole interposed therebetween, and a valve body that opens and closes the communication hole is built in the primary side chamber. A cylinder chamber is provided above the valve body in the chamber, and a decompression-release type in which a piston having a larger pressure receiving area than the valve body is provided integrally in the cylinder chamber. In a fire extinguishing facility using a simultaneous opening valve, a bypass pipe that communicates the secondary side chamber and the pressure chamber is provided, and a normally closed electric valve is provided in the middle of the bypass pipe, and the secondary side chamber is at atmospheric pressure. In a closed state, the fire valve operates to open the motor-operated valve to reduce the pressure in the cylinder chamber, thereby opening the valve body and flowing fire extinguishing liquid from the primary side chamber to the secondary side chamber. To fill the secondary side piping with water The fire-resistant liquid is released from the sprinkler head when the heat-sensitive part of the closed-type sprinkler head attached to the secondary pipe and having a heat-sensible heat-sensitive part is melted by receiving heat from the fire. It is characterized by having it.
[0007]
According to a second aspect of the present invention, a primary side chamber and a secondary side chamber are formed inside a valve box with a communication hole interposed therebetween, and a valve body for opening and closing the communication hole is built in the valve box. A cylinder chamber is provided above the valve body, and a decompression release type simultaneous release valve in which a piston having a larger pressure receiving area than the valve body is provided integrally in the upper portion of the valve body. In the fire extinguishing equipment using the above, a bypass pipe that communicates the secondary side chamber and the pressure chamber is provided, and a normally closed motor-operated valve is provided in the middle of the bypass pipe, and the secondary side chamber is slightly pressurized. The heat-sensitive part of the closed-type sprinkler head, which is closed by filling with compressed air and has a heat-sensitive heat-sensitive part attached to the secondary pipe, melts in response to heat from the fire. Reduces the pressure in the secondary piping. Is detected by a pressure sensor, and the motor-operated valve is opened by the detection signal to reduce the pressure in the cylinder chamber, thereby opening the valve body, and extinguishing liquid flowing from the primary side chamber to the secondary side chamber is closed. It is characterized by being discharged from the mold sprinkler head.
[0008]
In the fire extinguishing equipment using the decompression-release type simultaneous opening valve according to claim 1 or 2, as in the invention according to claim 3, a pilot for pressure adjustment is provided in the middle of the bypass pipe between the motor-operated valve and the cylinder chamber. A valve can be provided.
[0009]
[Operation and effect of the invention]
According to the first aspect of the present invention, the decompression release type simultaneous release valve is provided with a bypass pipe in the secondary side chamber and the cylinder chamber, an electric valve is provided in the middle of the bypass pipe, and the electric valve is opened by the operation of the fire detector. Since the valve body is opened by operating and reducing the pressure in the cylinder chamber, it does not require a charge detection line like the conventional decompression open type simultaneous open valve, so it is used in winter and cold areas. The problem of malfunction and rupture due to freezing of water in the sensing line piping can be solved.
[0010]
Also, the secondary side chamber is closed at atmospheric pressure, and the valve is opened by reducing the pressure in the cylinder chamber by opening the motorized valve by the operation of the fire detector, and the inside of the secondary side pipe is opened. The closed-type sprinkler is designed so that the heat-sensitive part of the closed-type sprinkler head attached to the secondary pipe is melted by receiving heat from the fire and the fire-extinguishing liquid is released after the pressurized water is applied. As soon as the heat sensitive part of the head melts, the fire extinguishing liquid can be released instantly, and even if a pipe breakage accident occurs in the event of a non-fire and a gap occurs due to this damage, the fire detector will As long as the occurrence is not sensed, there is no false release of fire extinguishing liquid.
[0011]
According to the second aspect of the present invention, the pressure sensor detects that the pressure in the secondary side pipe that has been closed due to the filling of the pressurized air that has been slightly pressurized is reduced. Since the valve body is opened by opening the valve to reduce the pressure in the cylinder chamber, as in the case of the invention according to claim 1, water filling such as a conventional decompression open type simultaneous open valve is performed. The sensing line is not required, and therefore it is possible to solve the problem of malfunction or rupture due to freezing of water in the sensing line piping even in winter or in cold regions.
[0012]
In particular, in the invention according to claim 2, the secondary side chamber is normally closed by filling with pressurized air that is slightly pressurized, and the heat-sensitive portion of the closed sprinkler head attached to the secondary side pipe is provided. The pressure sensor senses that the pressure in the secondary side pipe decreases due to heat at the time of the fire, and the motorized valve is opened by this sensing signal. Since the secondary side piping is not filled with water, there is no need to worry about freezing of the secondary side piping even in winter or in cold regions.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS A preferred embodiment of a fire extinguishing facility using a pressure reducing open type simultaneous opening valve according to the invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a simultaneous opening valve used in the fire extinguishing equipment of the first embodiment in a closed state, and FIG. 2 is a sectional view showing a simultaneous opening valve used in the fire extinguishing equipment of a second embodiment in a closed state.
[0014]
(First embodiment)
In FIG. 1, the decompression-release type simultaneous opening valve used in the fire extinguishing equipment according to the present invention includes a primary side chamber 2 and a secondary side chamber 3 that are formed inside a valve box 1 with a communication hole 4 therebetween, and a communication hole 4. A valve body 5 for opening and closing the valve is incorporated. The valve body 5 in the illustrated example is composed of a small valve 5a integrated in the middle of the valve rod 6 near the lower end, and a large valve 5b inserted through the valve rod 6 below the small valve 5a. Only the valve 5a is opened to prevent hunting, and the large valve 5b and the small valve 5a are opened at a large flow rate. However, a single valve may be used. In the primary chamber 2, a cylinder chamber 7 is provided above the valve body 5, and a piston 8 having a larger pressure receiving area than the valve body 5 is built in the cylinder chamber 7. It is formed integrally with the upper end of the valve stem 6 that penetrates the hole 9. A small through hole 10 for communicating the primary chamber 2 and the cylinder chamber 7 is formed at the bottom of the cylinder chamber 7, and a small through hole 11 is also formed in the piston 8. Accordingly, the valve body 5 is normally pressed against the valve seat 12 around the communication hole 4 by pressure water such as a primary-side foam aqueous solution received on the upper surface of the piston 8 to keep the communication hole 4 closed.
[0015]
The inlet 13 of the primary side chamber 2 is connected to a pressurized water supply device (not shown) via a primary side pipe 14, and the secondary side pipe 16 is connected to the outlet 15 of the secondary side chamber 3, and the secondary side pipe A known closed type sprinkler head (not shown) having a heat sensitive part (fusible link or glass valve) and a seal mechanism is attached to 16.
[0016]
In the simultaneous opening valve having the above-described configuration, the present invention is provided with a bypass pipe 17 that communicates the cylinder chamber 7 and the secondary side chamber 3, and a normally closed type electric valve 18 such as an electric ball valve is provided in the middle of the bypass pipe 17. When the motor valve 18 normally closes the middle of the bypass pipe 17 and the motor valve 18 receives a fire signal from the fire detector 19 that senses the occurrence of a fire through the control panel 20, the valve opens. As a result, the fire extinguishing liquid (pressure water) in the cylinder chamber 7 flows out to the secondary side chamber 3 via the bypass pipe 17 and the pressure in the cylinder chamber 7 decreases, so that the valve body 5 is opened and the fire extinguishing liquid is transferred to the primary side chamber. 2 to the secondary side chamber 3 through the communication hole 4. A pilot valve 21 for adjusting pressure is provided in the middle of the bypass pipe 17 between the electric valve 18 and the cylinder chamber 7 as necessary.
[0017]
When the secondary side chamber 3 is normally closed at atmospheric pressure and the motor valve 18 is opened by the operation of the fire detector 19 and the pressure in the cylinder chamber 7 decreases as described above in the event of a fire, the valve body is reduced. 5 opens, and the fire extinguishing liquid flows from the primary side chamber 2 into the secondary side chamber 3, whereby the inside of the secondary side pipe 16 is brought into a pressurized and charged state. Thereafter, the heat-sensitive part of the closed sprinkler head attached to the secondary pipe 16 is dissolved by the heat generated in the event of a fire, so that the seal mechanism of the head is disassembled, the water outlet is opened, and the fire extinguishing liquid is released. It is a thing.
[0018]
According to the fire extinguishing equipment having the above configuration, the secondary side pipe 16 is preliminarily filled in a pressurized state by the operation of the fire detector 19 in the event of a fire, so the closure attached to the secondary side pipe 16 is closed. When the heat-sensitive part of the mold sprinkler head melts, fire extinguishing liquid can be released instantly, and even if a pipe breakage accident occurs in the event of a non-fire and a void is generated due to this damage, the fire detector 19 As long as the fire did not detect the occurrence of a fire, the firefighting liquid was not released.
[0019]
(Second embodiment)
FIG. 2 shows a second embodiment. Also in the second embodiment, the decompression opening type simultaneous opening valve itself is the same as that of the first embodiment. In the first embodiment, the motor-operated valve 18 is opened by a signal from the fire detector 19, and the motor-operated valve 18 is opened to bring the secondary side pipe 16 into a pressurized water state. The part is melted by fire heat and the fire extinguishing liquid is discharged from the water outlet of the head. On the other hand, in the second embodiment, the secondary side chamber 3 is normally closed by being filled with pressurized air that is slightly pressurized, and a closed sprinkler attached to the secondary side pipe 16 in the event of a fire. The heat sensitive part of the head is melted by the heat generated by the fire and the seal mechanism of the head is disassembled, and the pressure sensor 22 senses that the pressure in the secondary side pipe 16 decreases due to this disassembly, and the motor operated valve 18 22 is opened by receiving the sensing signal through the control panel 20, and the pressure in the cylinder chamber 7 is reduced. As a result, the valve body 5 is opened, and the fire extinguishing liquid flowing from the primary side chamber 2 to the secondary side chamber 3 is closed. It is made to discharge from the water outlet opened by disassembling the seal mechanism of the mold sprinkler head.
[0020]
According to the fire extinguishing equipment of the second embodiment, since the secondary side pipe 16 is not always filled with air by pressurizing the secondary side pipe 16, the secondary side pipe 16 can be used even in the winter or cold districts. There is no longer any worry about freezing.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a simultaneous release valve used in a fire extinguishing facility of a first embodiment in a closed state.
FIG. 2 is a cross-sectional view showing a simultaneous open valve used in a fire extinguishing facility of a second embodiment in a closed state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Valve box 2 Primary side chamber 3 Secondary side chamber 4 Communication hole 5 Valve body 6 Valve rod 7 Cylinder chamber 8 Piston 16 Secondary side piping 17 Bypass pipe 18 Electric valve 19 Fire detector 21 Pilot valve 22 Pressure sensor

Claims (3)

A primary side chamber and a secondary side chamber are formed inside the valve box with a communication hole interposed therebetween, and a valve body for opening and closing the communication hole is built in, and a cylinder chamber is provided above the valve body in the primary side chamber. In the fire extinguishing equipment using a decompression release type simultaneous release valve, in which a piston having a larger pressure receiving area than the valve body, which is provided integrally with the upper part of the valve body, is built in the cylinder chamber.
A bypass pipe for communicating the secondary side chamber and the pressure chamber is provided, and a normally closed motorized valve is provided in the middle of the bypass pipe,
The secondary side chamber is closed at atmospheric pressure, and the motor valve is opened by reducing the pressure in the cylinder chamber by operating the fire detector, thereby opening the valve body and releasing the valve from the primary side chamber. The heat-sensitive part of the closed-type sprinkler head having a heat-sensitive heat-dissolvable part attached to the secondary pipe after the inside of the secondary pipe is charged and pressurized by pouring a fire extinguishing liquid into the secondary chamber. A fire-extinguishing equipment using a decompression-release type simultaneous release valve, wherein a fire-extinguishing liquid is discharged from the sprinkler head when melted by receiving heat during a fire. A primary side chamber and a secondary side chamber are formed inside the valve box with a communication hole interposed therebetween, and a valve body for opening and closing the communication hole is built in, and a cylinder chamber is provided above the valve body in the primary side chamber. In the fire extinguishing equipment using a decompression release type simultaneous release valve, in which a piston having a larger pressure receiving area than the valve body, which is provided integrally with the upper part of the valve body, is built in the cylinder chamber.
A bypass pipe for communicating the secondary side chamber and the pressure chamber is provided, and a normally closed motorized valve is provided in the middle of the bypass pipe,
The secondary-side chamber is closed by filling with pressurized air that is slightly pressurized, and the heat-sensitive part of the closed sprinkler head attached to the secondary-side pipe and having a heat-soluble heat-sensitive part fires. The pressure sensor senses that the pressure in the secondary side pipe decreases due to the heat of the time, and this melting causes the motorized valve to open and reduce the pressure in the cylinder chamber. Thus, the valve element is opened, and the fire extinguishing liquid flowing into the secondary side chamber from the primary side chamber is discharged from the closed type sprinkler head. The fire extinguishing equipment using a decompression release type simultaneous release valve according to claim 1 or 2, wherein a pilot valve for adjusting pressure is provided in the middle of a bypass pipe between the electric valve and the cylinder chamber.

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