JP2594320Y2 - Simultaneous release valve - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simultaneous release valve used in a sprinkler fire extinguishing system for extinguishing a fire by spraying a fire extinguishing liquid from a sprinkler head when a fire occurs.

[0002]

2. Description of the Related Art In places such as offices and department stores of high-rise buildings or underground shopping streets where it is difficult to extinguish a fire truck even when a fire engine is dispatched in the event of a fire, sprinkler fire extinguishing equipment must be installed according to the Fire Service Law. Mandatory. Generally, a sprinkler fire extinguishing system installed in such a place is a wet sprinkler extinguishing system.

[0003] The wet-type sprinkler fire extinguishing system is always filled with the extinguishing liquid from the water source for storing the extinguishing liquid to the end sprinkler head for spraying the extinguishing liquid. Only the head operates, and the fire extinguishing solution is sprayed from here to extinguish the fire.

[0004] The sprinkler head used in this wet type sprinkler fire extinguishing system has a so-called valve seat formed inside, and the valve seat is closed by a valve body in normal times, and the valve body is held by a thermal decomposition part. "Closed sprinkler head".

[0005] By the way, wet sprinkler fire extinguishing equipment is suitable for places such as offices and department stores where fire can be easily extinguished simply by spraying a fire extinguishing solution at a place where a fire has occurred.
It cannot be used in places where such fire cannot be extinguished, for example in parking lots and theaters.

Because, in a parking lot, many cars are stopped only at a small interval, and when a fire occurs, cars filled with gasoline burn one after another,
This is because if only the sprinkler head installed above the place where a fire occurs as in the above-mentioned wet type sprinkler fire extinguishing system operates, it will not be possible to cope with a fire that burns one after another.

In a theater, the ceiling is high, so that the fire becomes considerably large before the flame of the fire reaches the sprinkler head on the ceiling. In addition, if a wide curtain spread from the ceiling burns, the fire spreads over a wide area at once. To spread
Waiting for the spray liquid to spray from the sprinkler head until all the sprinkler heads on the stage curtain have been activated takes a long time, resulting in a large fire.

[0008] Therefore, in places such as parking lots and theaters,
A dry sprinkler fire extinguishing system is installed to spray fire extinguishing liquid from many sprinkler heads at once when a fire occurs.

In addition, dry sprinkler fire extinguishing equipment
It is also installed in cold regions where the fire extinguishing fluid in the piping freezes in winter.

An open sprinkler head is used for water sprinkler fire extinguishing equipment. The open-type sprinkler head has no valve element or thermosensitive decomposition part installed inside, and immediately sprays the fire extinguishing liquid introduced into the piping. Therefore, between the primary pipe connected to the water source and the secondary pipe to which the sprinkler head is attached, a simultaneous release valve having a different structure from the valve used in the wet sprinkler fire extinguishing equipment must be used.

In a dry-type sprinkler fire extinguishing system, the piping from the water source to the simultaneous release valve is filled with a fire extinguishing liquid or a fluid such as compressed air, but the piping from the simultaneous release valve to the open type sprinkler head is not filled. Neither fire extinguishing fluid nor compressed air is filled. A closed sprinkler head for fire detection is installed near the combustibles, and a sensing pipe to which the closed sprinkler head is attached is connected to a simultaneous release valve.

When a fire occurs in a building in which a dry-type sprinkler fire extinguishing system is installed, a closed-type sprinkler head for fire detection, which is installed near a flame, operates. Then, the fire-extinguishing liquid or compressed air filled in the sensing pipe flows out of the closed type sprinkler head, so that the pressure in the sensing pipe decreases, and the pressure drop causes the valve element in the simultaneous opening valve to open. At the same time, the pump of the water source operates, and the fire extinguishing liquid of the water source flows into the secondary pipe, which is sprayed from the open sprinkler head.

[0013]

[Problems to be Solved by the Invention] By the way, in a dry sprinkler fire extinguishing system, a fluid such as fire extinguishing solution or air is contained in a sensing pipe having a fire detecting sprinkler head or in a primary pipe between a water source and a simultaneous release valve. The pressure is usually 10 kgf / cm ² , but this pressure may be three times or more as high as normal, that is, 30 kgf / cm ² or more.

In general, a closed-type sprinkler head for fire detection, a simultaneous opening valve, and the like are designed with sufficient consideration of a safety factor, and are usually 3 to 10 kgf / cm ² for a pressure of 10 kgf / cm ² .
It can withstand double pressure. However, if the pressure in the pipe exceeds 30 kgf / cm ² , the safety factor exceeds three times, so not only closed sprinkler heads for fire detection and simultaneous release valves, but also pipes and other incidental Equipment will be destroyed.

The cause of abnormally high pressure in the sensing pipe in the dry sprinkler fire extinguishing equipment installed in the parking lot is that the parking lot has no ceiling, and the sensing pipe is placed near the roof, so it can be exposed to direct sunlight in midsummer. When the roof becomes hot, the heat heats the sensing pipe and causes the fire extinguishing liquid and air in the sensing pipe to thermally expand. Then, in a small-volume pipe, even a small expansion of fire extinguishing liquid or air will occupy a high proportion in the pipe,
The pressure in the pipe becomes three to five times the normal pressure.

In the primary pipe, the fire extinguishing liquid sucked up by the pump is adjusted to about 10 kgf / cm ² by the pressure adjustment tank. If the adjustment tank fails, a pressure of 10 kgf / cm ² or more is applied to the primary pipe. It becomes like this.

In order to eliminate the abnormally high pressure in the piping, it is conceivable to install a relief valve in the middle of the piping or at the end of the piping. However, in order to install the relief valve, installation work and joints, extension pipes and the like for that purpose are required. Is also necessary, which is not economically preferable. An object of the present invention is to provide a simultaneous opening valve that can handle abnormally high pressure without installing a separate relief valve in a pipe.

[0018]

SUMMARY OF THE INVENTION The present inventor has proposed a closed sprinkler head, a simultaneous opening valve, etc. by allowing a fire extinguishing liquid or air in a pipe having an abnormally high pressure to flow to a place having a lower pressure. The present invention was completed by paying attention to the fact that there is no longer destruction.

According to the present invention, when a fire occurs, the closed sprinkler head attached to the sensing pipe operates to reduce the pressure in the control chamber, thereby opening the piston valve and sending the fire extinguishing liquid in the primary pipe to the secondary pipe. Normal time for simultaneous release valve
A safety valve is installed inside the control room that allows the high-pressure fire extinguishing liquid or air or other fluid to flow out to other places when the pressure in the piping is increased by pressing the valve body against the valve seat with a compression spring. It is a simultaneous release valve characterized by being performed.

The present invention will be described below with reference to the drawings. FIG. 1 is a central sectional view of the simultaneous opening valve of the present invention, FIG. 2 is a central sectional view of a safety valve used in the present invention, and FIG.

A partition 2 is formed in the main body 1 of the simultaneous release valve to partition the interior obliquely. One partitioned by the partition is a primary chamber 3 and the other is a secondary chamber 4.

The end of the primary chamber 3 is inserted into the water source 5,
A primary pipe 8 having a pump 6, a pressure adjusting tank 7, and the like is connected on the way, and a secondary pipe 10 to which a number of open sprinkler heads 9 are attached is connected to the secondary chamber 4.

A foam head may be attached to the secondary side pipe instead of the open type sprinkler head to extinguish the fire with foam when a fire occurs. Fire extinguishing by foam is suitable for a parking lot where an automobile equipped with a large amount of flammable gasoline or rubber or synthetic resin that emits toxic gas when burnt is placed.

When an open sprinkler head is installed in a parking lot, the parking lot has a low ceiling and no decorative ceiling plate. Therefore, an upward open sprinkler head is used.

The upper portion of the primary chamber 3 is cylindrical cylinder 11
And a bowl-shaped lid member 12 is provided thereon so as to keep the inside in a sealed state.

A hole is formed in the center of the cover member 12, and a female screw 13 is screwed into the hole.
, A spindle 14 is screwed. A hole 15 communicating with the outside is formed in one side of the lid member 12, and a tapered female screw 16 is screwed at an outlet of the hole. A sensing pipe 18 to which a closed type sprinkler head 17 is attached is connected to the tapered female screw 16.

The partition 2 has a horizontal center, an opening 19, and an upper portion serving as a valve seat 20. A piston valve 21 is mounted on the valve seat 20. The upper part of the piston valve 21 is a flange 22, and the flange slides up and down along the cylinder 11 described above.

The space formed by the piston valve 21, the cylinder 11, and the lid member 12 is a control chamber 23.

At the center of the piston valve 21, a cylindrical guide 24 rises, and the guide slides along the spindle 14. Therefore, the open state of the piston valve 21 can be adjusted by adjusting the screwing state of the spindle 14 and moving the tip position.

A check valve 25 is provided below the flange 22 on the piston valve 21. This check valve has a structure in which the fluid in the primary chamber 3 can flow into the control chamber 23 but does not allow the fluid in the control chamber 23 to flow into the primary chamber 3. Since the structure of the check valve is not related to the gist of the present invention, a detailed description is omitted.

A compression spring 26 is provided between the lid member 12 and the piston valve 21. In normal times, the piston valve 21 is pressed against the valve seat 20 so that the fluid in the primary chamber does not flow into the secondary chamber. ing.

A safety valve 27 is provided on the bottom of the piston valve 21. The safety valve is to prevent high-pressure fluid from being destroyed by allowing high-pressure fluid to flow out to another location when the pressure of one of the fluids exceeds a predetermined pressure. The safety valve is installed inside the control room, and can be installed on the wall surface of the control room or on the side surface of the piston valve in addition to the bottom of the piston valve as in the embodiment. A preferred safety valve used in the present invention is shown in FIGS.

The safety valve 27 has a male screw 28 threaded around its outer periphery, a hole 29 formed at one end, and a lower end serving as a divergent valve seat 30. A female screw 31 is screwed inside the other end of the safety valve, and an adjusting lid 32 is screwed into the female screw 31 here. The adjustment lid 32 has a hole 33 in the center, and a plurality of outflow holes 34. The valve seat 35 is provided with a valve body 35 having the same inclined surface as the valve seat. A sliding rod 36 is installed at the center of the valve body,
The slide bar is slidably inserted into the hole 33 of the adjustment lid. A compression spring 3 is provided between the rear surface of the valve body 35 and the adjustment lid 32.
7 are installed. The adjustment of the spring force of the compression spring is performed with the adjustment cover screwed.

When a fluid having a predetermined pressure or more is applied to the valve body, the valve body 35 whose valve seat is sealed by a compression spring 37 is pushed by the fluid to push the valve seat 30 as shown in FIG. Open and the fluid passes through the safety valve and through the plurality of holes 3 in the regulating lid 32.
Outflow from 4.

The safety valve 27 is a piston valve 2 of a simultaneous release valve.
Screw it into the female screw on the bottom of 1 and attach it. At this time, the valve body 35 of the safety valve is attached to the control room 23 side.

Next, the operation of the simultaneous opening valve of the present invention will be described.

In the dry-type sprinkler fire extinguishing system, the fire extinguishing liquid is filled up to the primary side pipe 8 and the primary side chamber 3 in normal times. At this time, the fire extinguishing liquid is filled from the primary side through the check valve 25 to the inside of the control chamber 23 and the inside of the sensing pipe 18 at a pressure of about 10 kgf / cm ² .

In midsummer, when the roof of the parking lot where the dry-type sprinkler fire extinguishing system is installed is heated and the heat heats the sensing pipe near the ceiling, the fire extinguishing liquid in the sensing pipe thermally expands. The fire-extinguishing liquid that has thermally expanded presses on the sensing pipe, the closed sprinkler head, the control room of the simultaneous opening valve, and the like.

At this time, in the conventional simultaneous release valve, since there was no place for the extinguishing liquid that had thermally expanded to escape, the weak portions of the sensing pipe, the closed sprinkler head, and the simultaneous release valve were destroyed.

However, in the simultaneous opening valve of the present invention,
Yes installed a safety valve on the bottom of the piston valve, the left so as to operate the safety valve at 10 kgf / cm ^2, even fire extinguishing liquid becomes 10 kgf / cm ² or more high-pressure control chamber, the extinguishing liquid After flowing out from the safety valve to the secondary side chamber, the control chamber is always kept at a predetermined pressure.

In the embodiment, the primary side chamber, the control room, and the sensing pipe are filled with a fire extinguishing liquid. However, the present invention can also be used in a dry sprinkler fire extinguishing system in which compressed air is filled instead of the fire extinguishing liquid. Needless to say.

[0042]

[Effects of the Invention] As described above, the simultaneous release valve of the present invention can discharge the increased fire extinguishing liquid from the control room to the secondary side chamber even if the pressure in the sensing pipe becomes abnormally high. The control room, the sensing pipe, the closed-type sprinkler head, and the like are not destroyed and have excellent reliability and safety.

[Brief description of the drawings]

FIG. 1 is a central sectional view of a simultaneous release valve of the present invention.

FIG. 2 is a central sectional view of the safety valve used in the present invention.

FIG. 3 is a central cross-sectional view illustrating an operation state of a safety valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body of simultaneous release valve 3 Primary chamber 4 Secondary chamber 5 Water source 8 Primary pipe 9 Closed sprinkler head 10 Secondary pipe 11 Cylinder 12 Cover member 17 Open sprinkler head 18 Sensing pipe 21 Piston valve 23 Control room 27 Safety valve

Claims (2)

(57) [Scope of request for utility model registration] When a fire occurs, a closed sprinkler head attached to a sensing pipe operates to lower the pressure in a control chamber, thereby opening a piston valve and discharging fire extinguishing liquid in a primary pipe to a secondary pipe. in the simultaneous release valve to be sent to, peacetime compression server
When the valve body is pressed against the valve seat with the valve, and the pressure in the pipe becomes high, a safety valve capable of allowing high-pressure fire extinguishing liquid or fluid such as air to flow out to another location is installed inside the control room. Simultaneous release valve. 2. The simultaneous opening of the safety valve according to claim 1, wherein the installation position of the safety valve is a bottom portion of a piston valve for discharging a high-pressure fire extinguishing liquid or a fluid such as air in the sensing pipe to a secondary side. valve.