JP4285610B2 - Pre-actuated sprinkler equipment - Google Patents

Description

The present invention relates to a pre-actuated sprinkler facility.

In the pre-actuated sprinkler facility, fire extinguishing water is sprayed from the sprinkler head when both the fire detector installed in the room and the sprinkler head are activated by a fire.

The pre-actuated water detector used in the pre-actuated sprinkler facility is provided in the middle of the pipe connected from the water source to the sprinkler head, and the primary side of the pre-actuated water detector is connected to the water source. The secondary side is connected to the sprinkler head.

Piping connected to the secondary side of the pre-actuated water flow detection device, so-called secondary side piping filled with gas such as air or non-combustible gas is called dry pre-acting sprinkler equipment, which is filled with extinguishing water. Wet pre-actuated sprinkler equipment.

In both the dry and wet processes, the valve element inside the pre-actuated water flow detector is closed during normal times. When the fire detector is activated in the event of a fire, the valve body is opened and the water channel from the water source to the sprinkler head is opened. In the case of dry type, fire extinguishing water flows into the secondary side piping.

When a fire occurs in the pre-actuated sprinkler system, the fire detector is activated by the heat of the fire, and the valve body of the pre-actuated water flow detector is opened. Then, the fire extinguishing water on the primary side can be passed through to the secondary side, and in the case of a dry type, the secondary side pipe is filled with water.

When the sprinkler head is operated following the operation of the fire detector, the water filled in the secondary side pipe is discharged from the sprinkler head. Next, the pump is activated, pumps out the fire extinguishing water from the water source, supplies it to the sprinkler head, and continuously spreads the fire extinguishing water to suppress and extinguish the fire.

When the sprinkler head is activated in a time other than during a fire, the valve body of the pre-actuated water flow detector remains closed, so only the gas or fire extinguishing water in the secondary pipe will flow out, even in the case of a wet type. Damage caused by water leakage can be minimized.

In recent years, wet pre-actuated sprinkler equipment that has a simple equipment configuration and that immediately discharges fire-fighting water in the event of a fire has attracted attention. In addition, in order to reduce the amount of water loss when the sprinkler head malfunctions in a wet pre-actuated sprinkler facility, if only the sprinkler head is activated without the fire sensor being activated, the water in the secondary side pipe will be drained. There is a sprinkler facility that can reduce the amount of water discharged from the sprinkler head by draining or suctioning to suppress water damage (for example, see Patent Documents 1 and 2).

JP 2000-51385 A (page 2-3, FIG. 1) JP 2000-140148 A (page 2-4, FIG. 1)

Since the sprinkler equipment described in Patent Documents 1 and 2 uses electrical means for starting the drainage means and suction means, it is necessary to secure an emergency power source in order to reliably operate even in an emergency, Equipment costs would increase.

Therefore, in view of the above problems, the present invention aims to provide a pre-actuated sprinkler facility provided with drainage means that can be activated without using electrical means for activation of the drainage means.

To achieve the above object, the invention of claim 1, wherein the primary side is connected to the water supply source, the secondary side is installed in the sprinkler head, opened by operation of the installed fire detector in the vicinity of the sprinkler head an open valve that is, is connected to the secondary side of the open valve, and drainage means for discharging the liquid of the secondary side by the secondary pressure of the relief valve drops below the first pressure, the In the pre-operated sprinkler equipment, the drainage means includes a valve body that opens and closes a flow path for discharging, and a resilient body that biases the valve body in a valve opening direction. Is closed by the pressure of the secondary side fluid of the release valve, and is opened when the pressure drops below the first pressure , and further the secondary side of the release valve the, from the secondary pressure of the release valve is the first pressure When have drops below a second pressure, which is pre-activated sprinkler, characterized in that it comprises a vacuum distribution means from the primary side of the release valve allows water flow to the secondary side.

The invention according to claim 2 is the pre-actuated sprinkler facility according to claim 1, wherein the drainage means that is activated is closed when the pressure on the secondary side becomes equal to or higher than the first pressure. is there.

According to a third aspect of the present invention, the depressurizing flow means is a valve device that is normally closed and is opened by depressurization on the secondary side of the release valve. the following side is pre-activated sprinkler system according to claim 1, characterized in that a communicable.

According to the first aspect of the present invention, the drainage means is activated regardless of the decompression detection means in the secondary side piping as in the conventional sprinkler equipment, and the power source and wiring are not used by using no electrical means. Is not required, and the drainage means can be provided with a simple configuration. Moreover, it becomes possible to detect the decompression of the secondary piping by detecting the operation of the drainage means. In addition, fire extinguishing water in the secondary side pipe gradually decreases due to pressure fluctuations due to changes in temperature, small amounts of leakage from pipe joints, etc., so that the drainage means is not activated by this pressure reduction. A decompression flow means that starts at a second pressure set to be equal to or higher than the pressure is provided. The fire-extinguishing water in the secondary pipe can be maintained at a pressure higher than a predetermined pressure at which the drainage means is not activated at the time of warning by the decompression flow means.

According to the second aspect of the present invention, when the pressure in the secondary side pipe is reduced by the operation of the sprinkler head and the pressure reaches the first pressure, the drainage means is activated and the fire extinguishing water in the secondary side pipe is discharged. The The secondary side pipe is depressurized by the activation of the drainage means, but when the fire detector is activated later, the pump is started and the pressurized water flows into the secondary side pipe. When the pressure in the secondary side pipe becomes equal to or higher than the first pressure, the drainage means stops and fire-extinguishing water is stably discharged from the sprinkler head.

According to the invention described in claim 3 , the decompression flow means is normally prevented from flowing between the primary side and the secondary side by the valve device, and is opened by the pressure reduction on the secondary side. The valve body is always energized by the secondary pressure of the spring and the open valve to be in a closed state, and the pressure reducing flow means can be provided with a simple structure that is opened by reducing the pressure on the secondary side of the open valve. It is.

In practicing the present invention, it is preferable to use a pressure reducing operation valve that opens due to a decrease in the pressure on the secondary side of the open valve. The pressure reducing valve has a structure in which the valve body is closed when the pressure on the secondary side of the open valve is restored. As a specific example, one surface of the valve body is inactivated in the closing direction by the pressure on the secondary side of the open valve. And the opposite surface is biased in the opening direction by an elastic body such as a spring. At that time, the force of the projectile is designed so as to open the valve body when the pressure on the secondary side of the release valve becomes equal to or lower than the first pressure.

When the pressure on the primary side of the release valve and the pressure on the secondary side are made equal, the decompression flow means means a simple one that urges the valve body by the secondary side pressure and the force of the spring. Install between the side. If you want to make the pressure on the secondary side smaller than the pressure on the primary side, close the primary and secondary sides with electrically-controllable motor-operated valves, and open and close the motor-operated valves with pressure detection means on the secondary side. It is also possible to control the pressure and use a pressure reducing valve between the primary side and the secondary side.

Embodiment 1 of the present invention will be described below with reference to FIGS. FIG. 1 is a system diagram of a pre-actuated sprinkler system according to the present invention, FIG. 2 is a sectional view of an open valve according to the first embodiment, and FIG.

As shown in FIG. 1, the pre-actuated sprinkler equipment of the present invention includes a water source 1, a pump 2, an open valve 3, a sprinkler head 4, and a drainage device 5. These components are connected by piping, and are divided into a primary side pipe 6 and a secondary side pipe 7 with the normally closed open valve 3 as a boundary. Fire extinguishing water is contained in the primary side pipe 6 and the secondary side pipe 7. Filled.

The water source 1 is a water tank that stores fire extinguishing water. The pump 2 is a pressurized water feeding device that feeds the fire extinguishing water of the water source 1 to the sprinkler head activated in the event of a fire, and the pump 2 is activated when the pressure value of the pressure tank 8 installed in the primary side pipe 6 falls below a predetermined pressure. Is done.

As shown in FIG. 2, the opening valve 3 is divided into a primary chamber I and a secondary chamber II by a partition wall 9. The partition wall 9 is provided with a communication port 10 that communicates the primary chamber I and the secondary chamber II. The communication port 10 is installed on the bottom surface of the bottomed cylindrical valve body 11 and the valve body 11, and is connected to the communication port 10 side. It is closed by a spring 12 which is instable.

The side surface of the valve body 11 can slide along the inner wall of the valve box. A space called a control chamber 13 is formed on the back surface of the valve body 11 by the valve body 11 and the inner wall of the valve box, and the valve body 11 is made to flow into and out of the control chamber 13 by discharging and extinguishing fire water. It slides along the inner wall, and the communication port 10 can be opened and closed.

Connection ports 14 and 15 are provided in the control room 13, and the connection port 14 is provided with a pipe connected to the primary chamber I. A check valve 16 is provided on the pipe, and a check body 16 is provided inside the check valve 16 by a spring 17 so as to be disengaged to the primary chamber I side. The valve element 18 closes the flow path by the pressure and the force of the spring 17.

The force of the spring 17 may be weak, and when the pressure in the control chamber 13 falls below the pressure in the primary chamber I, the valve body 18 is moved to the spring 17 side, and the fire extinguishing water in the primary chamber I is replenished to the control chamber 13 Is done. The fire extinguishing water in the control chamber 13 is also discharged into the secondary chamber II through the small hole 19 formed in the valve body 11, and the primary chamber I, the control chamber 13, and the secondary chamber II are in the same pressure state. Yes.

A drain pipe is connected to the connection port 15 of the control chamber 13, and a motor valve 20 that is normally closed is installed on the water distribution pipe. The motor-operated valve 20 is opened by the operation of a fire sensor 21 installed in the vicinity of the sprinkler head 4. When the motor-operated valve 20 is opened, the fire extinguishing water in the control chamber 13 is drained, the valve body 11 is separated from the communication port 10, and the primary chamber I and the secondary chamber II can communicate with each other.

The sprinkler head 4 is activated by the heat of the fire, and spreads fire-extinguishing water in the secondary side pipe 7 uniformly in the room. Since the sprinkler head is well known, a description thereof will be omitted.

As shown in FIG. 3, the drainage device 5 has a cylindrical shape and is provided with connection ports 22 and 23 at the top and bottom. The connection port 22 is connected to a secondary pipe 7 (not shown), and the connection port 23 is connected to a drain pipe (not shown). ing. An inner flange 24 is installed inside the drainage device 5, and a valve body 25 is placed on the inner flange 24 so that the fire-extinguishing water in the secondary side pipe 7 does not flow to the connection port 23 side. The opening 26 is closed.

A spring 27 is installed on the connection port 23 side of the valve body 25, and is biased to push the valve body 25 up to the connection port 22 side. However, since the valve body 25 presses the inner flange 24 by the pressure of the fire extinguishing water in the secondary side pipe 7, the valve body 25 is not separated from the inner flange 24 by the force of the spring 27. The force of the spring 27 may be designed so as to pull the valve body 25 away from the inner flange 24 when the inside of the secondary side pipe 7 becomes 0.05 MPa, for example.

Then, the action | operation of the pre-acting type sprinkler installation of Example 1 is demonstrated.

During normal times, the open valve 3 maintains a closed state, and the primary side pipe 6 and the secondary side pipe 7 are filled with extinguishing water. When a fire occurs, the fire detector 21 is activated to activate the motor-operated valve 20 of the release valve 3 to drain the fire-extinguishing water in the control chamber 13 and open the valve body 11.

The opening of the valve body 11 allows the primary chamber I and the secondary chamber II to pass through fire extinguishing water. When the sprinkler head 4 is operated following the operation of the fire detector 21, the fire extinguishing water inside the secondary side pipe 7 is discharged from the activated sprinkler head 4. The operation of the sprinkler head 4 reduces the pressure in the secondary side pipe 7 and the fire extinguishing water in the primary side pipe 6 also passes through the release valve 3 and is supplied to the secondary side pipe 7. Reduce pressure.

When the pressure in the primary side pipe 6 is reduced, the pressure in the pressure tank 8 is also reduced, a pump activation signal is output from the pressure tank 8, and the pump 2 is activated. Fire extinguishing water pumped up from the water source 1 by starting the pump 2 passes through the primary side pipe 6, the release valve 3, and the secondary side pipe 7, is continuously supplied to the activated sprinkler head, and is discharged from the sprinkler head 4. Fire extinguishing water is sprayed evenly in the room and the fire is extinguished.

Further, the case where the sprinkler head is activated prior to the activation of the fire detector will be described.

When the sprinkler head 4 is activated by the heat of the fire, the fire extinguishing water in the secondary side pipe 7 is discharged from the activated sprinkler head 4 and the inside of the secondary side pipe 7 is rapidly decompressed. Due to the decompression of the secondary side pipe 7, the spring 27 in the drainage device 5 overcomes the pressure in the secondary side pipe 7 that presses the valve body 25, and the valve body 25 is opened. With the opening of the valve body 25, the fire extinguishing water in the secondary side pipe 7 flows out from the drain pipe, and the secondary side pipe 7 becomes empty.

Subsequently, when the fire detector 21 is activated, the valve body 11 in the release valve 3 is opened, and the fire-extinguishing water in the primary side pipe 6 flows into the secondary side pipe 7. Further, since the pressure in the primary side pipe 6 is also rapidly reduced, a pump activation signal is output from the pressure tank 8, and pressurized fire extinguishing water is supplied from the water source 1 to the activated sprinkler head 4 by the activation of the pump 2.

When pressurized fire-extinguishing water flows into the secondary side pipe 7, the pressure in the secondary side pipe 7 increases, and the valve body 25 of the drainage device 5 has a pressure on the inner flange 24 due to the pressure in the secondary side pipe 7. Sitting on top, drainage stops. The fire is extinguished by continuously discharging fire-extinguishing water from the sprinkler head 4.

On the other hand, the case where the sprinkler head malfunctions during a non-fire will be described.

If the sprinkler head malfunctions due to an external impact or the like other than during a fire, the fire extinguishing water in the secondary side pipe 7 flows out from the malfunctioning sprinkler head 4 and the pressure in the secondary side pipe 7 is reduced. The valve body 25 of the decompression device 5 is opened by depressurization of the secondary side pipe 7, and the fire extinguishing water in the secondary side pipe 7 is quickly drained, so the inside of the secondary side pipe 7 becomes empty. In addition, since the fire sensor 21 is not activated, the release valve 3 is also kept closed, so that the water discharge from the malfunctioning sprinkler head 4 is stopped and water damage damage can be reduced.

Next, Embodiment 2 of the present invention will be described with reference to FIG. FIG. 4 is a cross-sectional view of the release valve of the second embodiment.

In the second embodiment, parts having the same structure as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. In the pre-acting sprinkler facility of the second embodiment, the pressure on the secondary side of the release valve is set lower than the pressure on the primary side, and the pressure in the secondary side pipe is always within a certain range. It is controlled as follows.

The system configuration and operation of the pre-actuated sprinkler facility of the second embodiment are substantially the same as those of the first embodiment. The difference is the difference in the structure of the open valve, which will be described.

In the open valve 30 of the second embodiment, the pressure of the fire extinguishing water in the secondary chamber II is set lower than the pressure of the primary chamber I, and the pressure of the fire extinguishing water in the secondary chamber II and the secondary side pipe 7 is kept as low as possible. This has the effect of reducing the amount of fire-fighting water released when the sprinkler head 4 malfunctions.

Here, as an example, the open valve 30 configured to maintain the pressure in the secondary side chamber II and the secondary side pipe 7 in the vicinity of 0.2 MPa will be described. The release valve 30 has substantially the same structure as the release valve 3 of the first embodiment, but the structure for replenishing the secondary chamber II with extinguishing water is different when the valve body 11 is closed, and the primary chamber I and the secondary chamber II communicate with each other. A piping 31 is installed, and a motor-operated valve 32 that is normally closed is installed on the piping 31.

Further, a pressure detection unit 33 is installed between the motor operated valve 32 and the secondary chamber II, and the motor operated valve 32 is controlled to be opened and closed by a signal output from the pressure detection unit.

Specifically, the pressure detection unit 33 can detect two pressure values, that is, a pressure value for opening the motor-operated valve 32, for example, 0.15 MPa or less, and a pressure value for closing the motor-operated valve 32, which is 0.3 MPa or more. is there.

Thereby, the inside of the secondary chamber II and the secondary side piping 7 is in the range of 0.15 MPa to 0.3 MPa, and water damage damage can be reduced even when the sprinkler head 4 malfunctions.

Next, Embodiment 3 will be described with reference to FIGS. FIG. 5 is a cross-sectional view of the release valve of the third embodiment. FIG. 6 shows a cross-sectional view of FIG. 5 when the sprinkler head malfunctions.

Since Example 3 has substantially the same configuration and operation as Example 1, like Example 2, parts having the same structure are denoted by the same reference numerals and description thereof is omitted. The pre-actuated sprinkler facility of Example 3 is one in which drain means is integrally installed on an open valve, and its structure is shown in FIG.

In the open valve 40 shown in FIG. 5, a cylindrical movable valve seat 41 is installed at the communication port 10, and the movable valve seat 41 is biased toward the valve body 11 by the disc spring 42. In this state, the bottom surface of the valve body 11 is in contact.

On the extension of the shaft of the valve body 11 on the secondary chamber II side, a drain port D is provided and a drain pipe is connected. A valve seat 43A and a valve body 43B are provided in front of the drain port D, and a rod 44 that contacts the bottom surface of the valve body 11 is fixedly installed on the valve body 43B. The valve body 43B is biased toward the valve seat 43A by the spring 45, and the valve body 43B is always closed.

A plurality of small holes 46 are formed in the valve body 11 so that fire-extinguishing water in the primary chamber I can flow into the secondary chamber II through the control chamber 13. The diameter of the small hole is set so that the amount of water passing through the small hole 46 communicating from the control chamber 13 to the secondary chamber II is smaller than the flow rate when one sprinkler head is operated.

Next, a case where the sprinkler head on the pre-actuated sprinkler facility of Example 3 malfunctions will be described.

When the sprinkler head 4 is activated except during a fire, the valve body 11 of the release valve 40 remains closed, and the fire extinguishing water in the secondary side pipe 7 flows out of the activated sprinkler head 4 and The inside of the secondary pipe 7 and the inside of the secondary chamber II are depressurized. At that time, the fire extinguishing water flows from the primary chamber I through the control chamber 13 to the secondary chamber II, but the amount of water in the small hole communicating the control chamber 13 and the secondary chamber II is the extinguishing water discharged from the sprinkler head. Therefore, the pressure in the secondary pipe 7 is continuously reduced.

When the difference between the pressure in the secondary side pipe 7 and the pressure in the control chamber 13 is increased, the disc spring 42 that is inactivating the movable valve seat 41 by the pressure in the control chamber 13 is crushed by elastic deformation, and the valve body 11 and the movable valve seat 41 move to the secondary chamber II side.

Along with the movement of the valve body 11, the rod 44 in contact with the valve body 11 is also moved in the same direction, and the valve body 43B fixedly installed on the rod 44 is separated from the valve seat 43A and the fire extinguishing water in the secondary chamber II is Drained from the drain D. This makes it possible to reduce damage caused by water damage when the sprinkler head malfunctions.

System diagram of pre-actuated sprinkler equipment of the present invention Sectional drawing of the release valve of Example 1 Sectional drawing of the drainage means of Example 1 Sectional drawing of the release valve of Example 2 Sectional drawing of the release valve of Example 3 Sectional view of Fig. 5 when the sprinkler head malfunctions

Explanation of symbols

1 Water source
2 Pump
3 Opening valve
4 Sprinkler head
5 Drainage device
10 communication port
11 Disc
13 Control room
16 Check valve
19 Small hole
20 Motorized valve
21 Fire detector
22 Secondary side connection port
23 Drain side connection port
25 Disc
30 Opening valve of Example 2
32 Motorized valve
33 Pressure detection unit
40 Opening valve of Example 3
41 Movable valve seat
42 Belleville spring
43A Drainage means valve seat
43B Valve for drainage means
44 Rod
46 Small hole

Claims (3)

Primary side is connected to the water supply source, the secondary side is installed in the sprinkler head, it is connected to the open valve that is opened by actuation of the fire detector installed in the vicinity of the sprinkler head, and the secondary side of the relief valve And a drainage means for draining the liquid on the secondary side when the pressure on the secondary side of the release valve drops below the first pressure , the pre-actuated sprinkler facility, wherein the drainage means A valve body that opens and closes a flow path for performing the operation, and a resilient body that biases the valve body in a valve opening direction, and the valve body closes the flow path by the pressure of the secondary side fluid of the open valve And when the pressure drops below the first pressure, the flow path is opened. Further, the secondary side pressure of the open valve is the pressure on the secondary side of the open valve. Primary valve of the release valve when it falls below the second pressure higher than the pressure Pre-activated sprinkler, characterized in that it comprises a vacuum distribution means allows water flow to the secondary side from.
2. The pre-actuated sprinkler facility according to claim 1, wherein the drainage means that is activated is closed when the pressure on the secondary side becomes equal to or higher than the first pressure.
The decompression flow means is a valve device that is normally closed and is opened by decompression of the secondary side of the release valve, and that the primary side and the secondary side of the release valve can communicate with each other by opening the valve device. The pre-actuated sprinkler facility according to claim 1 .

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