JP3405686B2 - Fire extinguisher gas valve - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a valve used in a fire extinguishing gas device.

[0002]

2. Description of the Related Art There is known a fire extinguishing gas device for extinguishing a fire by injecting a fire extinguishing gas into an area to be extinguished, for example, into one hermetically sealed indoor space to make the extinguishing gas concentration in the room equal to or higher than the extinction concentration. Conventionally, an inert gas such as carbon dioxide or halon gas has been used as the fire extinguishing gas.

Fire extinguishing equipment using these carbon dioxide, halon gas, argon, nitrogen, and a mixed gas thereof can quickly extinguish a fire, there is almost no contamination by a fire extinguishing agent at the fire site, and the electrical insulation is impaired. Since the extinguishant is gas and can permeate through small gaps, a reliable fire extinguishing effect can be obtained even in a complex structure, and the extinguishing gas does not change over time and can be stored for a long time. Widely used in diverse places due to its many advantages.

On the other hand, recently, the problem of ozone holes caused by halon gas has been discussed on a global scale, and halon gas has become virtually unusable. Gases other than halon gas that are effective as extinguishing agents include argon, carbon dioxide, nitrogen, and a mixed gas thereof.

Regarding fire extinguishing equipment using carbon dioxide,
There are the following problems. First, the concentration of carbon dioxide when extinguishing a fire is designed to be about 35%, but if a person is present in the fire extinguishing area, the toxicity of carbon dioxide may cause a life-threatening situation. . Also, if the fire extinguishing gas is ejected due to a malfunction of the fire extinguisher even though it is not a fire, there is a similar risk for people in the room.

Secondly, when liquefied carbon dioxide is used, when it is discharged from the injection nozzle, it deprives the heat of vaporization from the surroundings, the temperature of the surroundings decreases, the moisture in the air is condensed, and the fog is applied. It becomes an obstacle to fire fighting. In addition, there is a possibility of causing insulation failure of electric equipment.

Thirdly, since carbon dioxide is heavier than air,
It stays below the fire site and the extinguishing effect decreases.

Due to these problems, various mixed-type inert fire-extinguishing gases have been used. An example of such a fire-extinguishing gas is an inert gas of nitrogen gas: 52% by volume carbon dioxide: 8% by volume argon: 40% by volume.

If this inert gas is liquefied, it causes the problem of fog as described above. Therefore, the inert gas is not liquefied but is stored and used in a high pressure state. However, if the gas is stored without being liquefied, the volume will be several times larger, and the number of cylinders will be several times larger. A valve is required for each cylinder.

Further, in a normal fire extinguishing facility, a large number of cylinders for extinguishing gas are installed at one place, and piping is provided so that the extinguishing gas can be supplied to a plurality of rooms from here, and is installed in a pipe leading to a room where a fire has occurred. The opened valve is opened so that the fire extinguishing gas is discharged only to that room. Therefore, it is necessary to provide a valve for each room.

[0011]

As described above, one fire extinguishing facility has required more valves for the fire extinguishing device than the conventional one, but the conventional valve has a complicated structure and is considerably expensive. Is. Therefore, the manufacturing cost of the fire extinguishing equipment was increased. The present invention was devised to eliminate the drawbacks of conventional devices, and an object of the present invention is to provide a valve for a fire-extinguishing gas device which has a simple structure and can be manufactured at low cost.

[0012]

In order to achieve the above object , a valve for a fire-extinguishing gas device according to the present invention comprises a valve body.
The first and second halves forming the
However, it is possible to communicate with the high-pressure fire extinguishing gas source on the first half side of the bulkhead.
A first chamber having a large opening and a second partition wall
Opening on the half side that can communicate with the pipeline that goes into the fire extinguishing compartment
Forming a second chamber having:
A piercing means formed by penetrating the
So that the partition can be pierced and the first chamber can be opened.
The mouth and the opening of the second chamber are arranged to face each other on both sides of the partition wall.
And the partition wall has a curved surface shape protruding into the second chamber,
The piercing means is the center of the opening of the first chamber and the opening of the second chamber.
A cutter that moves back and forth in a direction almost orthogonal to the line connecting the
It has a knife. Further, the piercing means is
Ar cylinder, hydraulic cylinder, or solenoid
It is also configured to be driven more.

[0013]

[0014]

[0015]

[0016]

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a sectional view of a fire extinguishing gas valve according to the present invention. In the figure, the valve body 10
Is composed of a lower first half body 11 and an upper second half body 12, and these flanges 11a, 1 are formed on each half body.
2a is tightened and connected by a bolt or the like (not shown). A partition wall 13 made of a thin metal plate is inserted into the connection part of the flanges 11a and 12a, and is sealed in an airtight state with packings 14 and 14 formed of rubber or the like sandwiched between the partition walls 13 inside the valve body 10. It is divided into a first chamber 11b and a second chamber 12b divided by 13. Partition wall 13
Is a shape in which a thin metal plate is curved so as to project toward the second chamber 12b.
Various surfaces such as a spherical surface, an elliptical surface, and a parabolic surface can be adopted.

Below the first chamber 11b, there is an opening 11c for connecting to a supply source of high-pressure fire extinguishing gas, and above the second chamber there is an opening 12c for connecting to a pipe to the fire extinguishing nozzle side. The two openings 11c and 12c are located at positions substantially opposite to each other via the partition wall 13.

Near the flange 12a of the second half body 12,
A piercing means 15 including a cutter knife 15a and a driving means 15b for the cutter knife is provided. The cutter knife 15a is installed in a hole 12d formed in the side surface of the second half body 12, and penetrates from the outside of the main body to the inside. Although an air cylinder is used as the driving means 15b in the embodiment, a hydraulic cylinder, a solenoid or the like may be used. Alternatively, it may be manually operated. The driving means 15b has a hole 1 in which a cutter knife 15a is provided.
2d is configured to be hermetically sealed. Further, in this embodiment, the cutter knife 15a is provided so as to advance in a direction substantially orthogonal to a line connecting the center of the opening 11c and the center of the opening 12c.

The fire extinguishing gas device valve has a pipe from a high-pressure fire extinguishing gas cylinder connected to the opening 11c at the lower end of FIG.

When a fire occurs in any of the plurality of rooms, the valve driving means 15b in the pipe line reaching the fire extinguishing nozzle installed in the room to be extinguished operates to cause the cutter knife 15a to move the partition 13 The cutter knife 15a breaks through the partition wall 13 at its tip.

When the cutter knife 15a pierces the partition wall 13, high-pressure fire-extinguishing gas is ejected from this hole as if a rubber balloon that was just inflated was picked up by a needle, and the partition wall 13 is driven by the force.
The fire extinguishing gas will flow into the fire extinguisher nozzle vigorously and extinguish the fire. At this time, the opening 11
When c and 12c are at positions facing each other with the partition wall 13 in between,
The flow of fire extinguishing gas becomes smooth.

It is to be noted that such a valve is installed in the pipeline from the high-pressure cylinder of fire-extinguishing gas to any of the plurality of rooms.
The number is not limited to one, and a plurality may be installed. In such a case, first, the valve closest to the high-pressure gas cylinder is opened as described above, and the first chamber of the next valve becomes sufficiently high in pressure, and then the piercing means 15 pierces it to break the partition wall. become.

By the way, the pressure of the extinguishing gas is 110
Since it is about 203 kg / cm2, the partition wall 13 is usually
It must be able to withstand this high pressure. Further, when a fire occurs, the partition wall must be ruptured at once by the pressure of the fire extinguishing gas when pierced by the piercing means 15. Although stainless steel 304 is suitable as a metal material suitable for such a purpose, the material is not limited to stainless steel 304, and is a material that is ruptured at a stretch by the pressure of the extinguishing gas when pierced by the piercing means 15. If it is good.

The piercing means 15 is replaced by an air cylinder,
If it is configured to be driven by a hydraulic cylinder or a solenoid, it can be used as an automatic fire extinguisher linked with a fire alarm.

[0026]

As described above, the fire extinguishing gas device valve of the present invention has a simple structure, so that the operation is simple and reliable, can be manufactured at low cost, and the manufacturing cost of the fire extinguishing gas device can be reduced. .

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a fire extinguishing gas valve according to the present invention.

[Explanation of symbols]

10 valve body 11 First Half 11a First room 11c opening 12 Second half 12a second room 12c opening 13 partitions 15 means of piercing 15a cutter knife 15b drive means

Continuation of the front page (56) Reference JP-A-10-216259 (JP, A) Actually open 52-75839 (JP, U) Actually open 62-107169 (JP, U) Actually open 62-138971 (JP , U) Actually developed 47-26523 (JP, U) Actually developed 62-102076 (JP, U) Actually developed 1-85579 (JP, U) Registered utility model 3045480 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) F16K 17/16

Claims (2)

(57) [Claims] 1. A first half and a second half forming a valve body.
The body is connected via a bulkhead, and high pressure is applied to the first half of the bulkhead.
Forming a first chamber having an opening that can communicate with a fire extinguishing gas source
And heading into the fire extinguishing compartment on the second half of the bulkhead.
Forming a second chamber having an opening capable of communicating with the cartilage conduit;
Piercing means formed in the two chambers by penetrating the second half body
Is provided, and the partition wall can be pierced by the piercing means,
Furthermore, the opening of the first chamber and the opening of the second chamber form a partition wall.
The partition walls are arranged to face each other on both sides, and the partition walls project into the second chamber.
It has a curved surface shape to project, and the piercing means opens the first chamber.
Almost orthogonal to the line connecting the mouth and the center of the opening of the second chamber
Characterized by having a cutter knife that advances and retracts in the direction
Fire extinguishing gas valve 2. The piercing means is an air cylinder or hydraulic pressure.
Driven by either cylinder or solenoid
A fire extinguishing gas device valve according to claim 1.