JP3398624B2 - Depressurized container valve for gas fire extinguishing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to extinguishing an inert fire extinguisher gas stored in a gas state in a fire extinguisher gas storage container into a fire-extinguishing target compartment to extinguish the concentration of the fire-extinguishing agent in the fire-extinguishing target compartment. A gas-based fire extinguisher equipment that is designed to extinguish a fire by maintaining the concentration above a certain level. is there.

[0002]

2. Description of the Related Art Conventionally, a fire extinguisher has been used as a gas-based fire extinguisher equipment that extinguishes a fire by extinguishing the fire extinguishing agent in the fire extinguishing target compartment and maintaining the concentration of the fire extinguishing agent in the fire extinguishing target compartment above the extinction concentration Those using an inert gas such as carbon dioxide or halon gas have been put into practical use.

When an inert gas such as carbon dioxide or halon gas is used as a fire extinguishing agent, these fire extinguishing agents are liquefied under pressure and filled in a fire extinguishing agent gas storage container composed of a high-pressure gas container, and then the fire extinguishing equipment. In a fire extinguisher gas storage container, open the container valve of the extinguisher gas storage container in the event of a fire using appropriate electrical or pneumatic means. It is sent to the jetting head through a pipe from and is discharged from the jetting head into the fire extinguishing target compartment. At this time, the inert gas such as carbon dioxide or halon gas is sent in a liquid state up to the ejection head, and at the moment when it is discharged from the ejection head into the fire extinguishing target compartment, it is vaporized and becomes a gas state, and the To suppress the fire.

The gas-based fire extinguishing equipment using the inert gas such as carbon dioxide and halon gas can suppress the fire rapidly, there is almost no pollution in the fire extinguishing target area by the fire extinguishing agent, and the electric insulation property. The fire extinguishing agent does not deteriorate, the fire extinguishing agent penetrates through the gap, and can exert a strong fire extinguishing effect even on a fire extinguishing object with a complicated structure.The extinguishing agent does not change over time and has a constant fire extinguishing ability. Therefore, it is widely used not only for petroleum related facilities and electric related facilities but also for general facilities.

However, in recent years, a problem concerning the destruction of the ozone layer has been raised on a global scale, and the extinguishing agent containing a halogenated hydrocarbon component such as halon gas was discontinued in January 1994. It has become virtually unusable. As a result, excluding special fire extinguishing equipment that uses expensive rare gas such as argon, it can be said that carbon dioxide is the only extinguishing agent currently used in gas fire extinguishing equipment.

On the other hand, it is known that the fire extinguishing equipment using this carbon dioxide as a fire extinguishing agent has the following problems. (1) When the fire is extinguished, the designed concentration of carbon dioxide in the fire extinguishing compartment is approximately 35%. At this concentration, if a person were present in the fire extinguishing compartment, the toxicity of carbon dioxide (anesthetic ) May cause a situation related to human life. (2) During a fire, carbon dioxide is sent in a liquid state up to the jet head, and is vaporized into a gas state at the moment it is released from the jet head into the fire-extinguishing target compartment. Since the heat of vaporization is taken away, the saturated vapor pressure of the air in the room is lowered, the moisture in the air is condensed, and static electricity is generated. As a result, the inside of the room will be fogged, hindering people's evacuation and rescue as well as fire extinguishing work.In addition, dew condensation and static electricity may cause insulation failure and breakdown of electronic devices, which may cause a serious secondary disaster. is there. (3) Since the density of carbon dioxide is much higher than that of air, the carbon dioxide released into the fire-extinguishing target compartment stays in the lower part of the fire-extinguishing target compartment, reducing the fire-extinguishing effect, and It is easy to dissipate to the outside from the lower opening. (4) Since global warming issues have been raised on a global scale, carbon dioxide, like halon gas, may be restricted in future use.

[0007]

SUMMARY OF THE INVENTION In order to solve many problems of the conventional gas-based fire extinguishing equipment, the applicant of the present invention first uses nitrogen gas or nitrogen gas that does not destroy the ozone layer. Fluoroalkane (perfluorobutane (C ₄ F ₁₀ )), hydrogenofluoroalkane (trifluoromethane (CHF ₃ ), heptafluoropropane (C ₃ HF ₇ ), or pentafluoroethane (C ₂
HF ₅ )) or hydrogenofluorohalogenoalkane (iodotrifluoromethane (CF ₃ I)) (hereinafter, these are collectively referred to as “fluorine compound”) mixed at a ratio of 10% by volume or less. A fire extinguishing system using the mixed gas (hereinafter, simply referred to as “mixed gas”) as a fire extinguisher was proposed (Japanese Patent Application No. 6-3126).
90 and Japanese Patent Application No. 7-77374).

However, it has been found that even when nitrogen gas or a mixed gas is used as an extinguishing agent for a gas-based fire extinguishing facility, the following problems occur. (1) Nitrogen gas or mixed gas as an extinguishing agent for gas-based fire extinguishing equipment is stored under pressure and stored in a gas state, so carbon dioxide or gas that is stored under pressure and liquefied is used. Compared with halon gas, the number of extinguishant gas storage containers required for extinguishing a fire extinguishing target compartment of the same volume is required to be several times larger, and a large installation space for the extinguishant gas storage container is required. (2) In order to reduce the number of installed extinguishant gas storage containers, it is necessary to increase the filling pressure of the inert extinguishant gas to fill the extinguishant gas storage container. If the pressure is increased, a high gas pressure of the inert fire extinguishing agent gas will be applied to the secondary side equipment of the fire extinguishing equipment such as the selection valve, the main pipe, the branch pipe, and the injection head. It is necessary to increase the pressure resistance grade, the equipment cost is significantly high, and it cannot be applied to existing equipment.

In view of the problems of the gas-based fire extinguishing equipment using an inert fire extinguisher gas stored in a gas state in a fire extinguishant gas storage container such as nitrogen gas or a mixed gas as a fire extinguishing agent, the present invention has a high pressure. It is possible to reduce the supply side gas pressure to a predetermined outlet side gas pressure, which makes it possible to increase the filling pressure of the inert fire extinguishant gas without increasing the pressure resistance grade of the secondary side equipment of the gas fire extinguisher equipment. An object of the present invention is to provide a decompression type container valve for a gas fire extinguishing facility.

[0010]

In order to achieve the above object, a decompression type container valve for gas fire extinguishing equipment according to the present invention comprises a flow path valve disposed in a gas flow path of a fire extinguishant gas storage container, and a flow path valve. In a decompression type container valve for a gas system fire extinguishing equipment, which is provided with a cylinder that opens a valve by pressing a passage valve with a piston, the piston of the cylinder is divided into front and rear parts, and between the divided pistons except at the time of starting. Is equipped with a spring member that is not loaded, and regulates the sliding range of the rear piston so that the rear piston is
By moving the sliding range of the
The front piston, which is biased only by the spring force of the member, flows.
It is characterized in that the passage valve is pressed to open the gas passage .

The pressure reducing container valve for gas fire extinguishing equipment of the present invention can increase the filling pressure of the inert fire extinguishing agent gas without increasing the pressure resistance grade of the secondary equipment of the fire extinguishing equipment, and the supply side gas pressure. The amount of the inert fire extinguishing agent gas released can be kept constant even when the value decreases.

In particular, this pressure reducing container valve for gas fire extinguishing equipment does not need to consider the pressure of the starting gas applied to the piston when setting the opening of the flow path valve, and the divided piston valve is used. Since the opening degree of the flow path valve can be set only by the spring force of the spring member arranged between the two, it is possible to easily and accurately set the opening degree of the flow path valve. Further, since the spring member can be in a state in which no load is applied except at the time of starting, the spring force does not change with time, and it is possible to always open the flow path valve at a stable opening degree.

In this case, the auxiliary piston is formed behind the rear piston, and the first piston is formed behind the auxiliary piston.
A fluid injection port is formed, and a second fluid injection port is formed by connecting a gas flow path on the gas supply side between the auxiliary piston and the rear piston through a blocking mechanism, and the blocking mechanism is opened. An opening device can be provided.

In this way, by dividing the two fluid inlets separately by the auxiliary piston, even if a pressure such as a starting gas is applied to one fluid inlet, this pressure is applied to the other fluid inlet. It is possible to prevent this.

Further, as the opening device, it is possible to employ a device having a remote operation mechanism for opening the shutoff mechanism by remote operation and / or a manual operation mechanism for directly opening the shutoff mechanism.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a decompression type container valve for gas fire extinguishing equipment of the present invention will be described below with reference to the gas fire extinguishing equipment shown in the drawings.

FIG. 1 shows an example of the gas fire extinguishing equipment using the pressure reducing container valve for the gas fire extinguishing equipment of the present invention. In this example,
It shows gas-based fire extinguishing equipment in the case of having three extinguishing target sections 6-1, 6-2, 6-3. This gas-based fire extinguishing equipment uses, for example, nitrogen gas as an inert fire extinguishing agent gas, and pressurizes it and stores it in a high-pressure gas container (180 kgf / cm ^{2 at} 35 ° C.) and stores it in the fire extinguishing equipment. By doing so, it is used as the extinguishant gas storage container 1. The gas-based fire extinguishing facility of this example includes five extinguishant gas storage containers 1-1, 1-2, ... 1-5, and each container 1
Is connected to a connecting pipe 3 via a container valve 2, the connecting pipe 3 is further connected to one collecting pipe 4, and the collecting pipe 4 is connected to each of the extinguishing target sections 6-1, 6-2, 6-. Main piping 5 extended to 3
Connect to -1, 5-2 and 5-3. Main piping 5-1 and 5-
Selective valves 9-1, 9-2, 9-3 are arranged at 2, 5-3, and an inert fire extinguishant gas is selectively supplied to the fire extinguishing target compartments 6-1, 6-2, 6-3. I will send it. Extinguishing target section 6-
Main pipes 5-1 and 5-extended to 1,6-2 and 6-3
2, 5-3 are connected to the branch pipes 8-1, 8-2, 8-3 respectively arranged in the fire extinguishing target compartments 6-1, 6-2, 6-3, and the branch pipes 8-1 , 8-2, 8-3 for fire extinguishing section 6
A plurality of jet heads 7-1, 7-2, and 7-3 are arranged at appropriate positions within -1, 6-2, and 6-3.

By the way, normally, each of the fire extinguishing target compartments 6-1,
Since 6-2 and 6-3 have different volumes, naturally, the amount of inert fire extinguishing agent gas required to extinguish a fire also differs. Therefore, the diameters of the main pipes 5-1, 5-2, 5-3 are made different according to the volumes of the fire extinguishing target sections 6-1, 6-2, 6-3, and in the event of a fire, Fire extinguishing target section 6-
The gas-based fire extinguishing equipment is configured such that the number of the extinguishant gas storage containers 1 corresponding to 1, 6-2, 6-3 is opened.

Here, the extinguishant gas storage container 1 to be opened
The number of the fire extinguishing target section 6-1 is 5, the fire extinguishing section 6
-2 is set to 3 and the fire extinguishing target section 6-3 is set to 1. In the figure, 9-1, 9-2, 9-3 are selection valves, 10-1, 10-2, 10-3 are selection valve opening devices,
11-1, 11-2, 11-3 are gas containers for starting, 12
Reference numerals -1, 12-2, 12-3 are solenoids for opening the starting gas container. Also, in the figure, 13-1, 13-2, 1
3-3 is a starting gas pipeline for controlling opening of the selection valves 9-1, 9-2, 9-3 and the starting gas containers 11-1, 11-2, 11-3, and is a selection valve opening device. 10-1,
10-2, 10-3, the non-return valve 14-1, 14-2, 14-3, 14-A, 14-B in the proper place on the way.
To arrange. In addition, non-return valve 14-1, 14-2, 14-
The passable directions of 3, 14-A and 14-B are represented by the directions of the arrows in the figure. The numbers 1, 2, and 3 at the end of these members correspond to the numbers 1, 2, and 3 at the end of the fire extinguishing target section, respectively.

In this case, in the container valve 2, as shown in FIG. 2, the high-pressure supply-side gas pressure P1 can be reduced to a prescribed predetermined outlet-side gas pressure P2 according to the present invention. The type container valve 2 is used. This pressure reducing container valve 2 is
As shown in FIG. 2, the gas flow path 2 of the extinguishant gas storage container 1
1 and a cylinder 24 that opens the valve by pressing the passage valve 22 with a piston 23. The flow path valve 22 receives supply gas pressure P1 from the gas supply side 21a of the gas flow path 21 on both pressure receiving surfaces, and from the gas outlet side 21b of the gas flow path 21 (the lower pressure receiving surface in FIG. The outlet side gas pressure P2 is configured to be applied at a predetermined area ratio (via the outlet side gas supply passage 21c), and is biased by the valve spring 25 in the direction of closing the gas passage 21. .

In this embodiment, in the pressure-reducing container valve 2, as shown in FIG.
Is divided so as to be separated in the front-rear direction, a spring member 27 is interposed between the divided pistons 23a and 23b, and a step portion 28 is formed in the cylinder 24 so as to restrict the sliding range of the rear piston 23b, The opening degree of the flow path valve 22 is adjusted by setting the spring force of the spring member 27 to adjust the gas flow path 2
It is configured to set the outlet side pressure of No. 1. In addition,
The cylinder 24 is formed with an air vent hole 24a that allows the air between the rear piston 23b and the front piston 23a to escape to the outside when the rear piston 23b moves.

An auxiliary piston 29 is formed behind the rear piston 23b, a first fluid inlet 30 is formed behind the auxiliary piston 29, and a second fluid is provided between the auxiliary piston 29 and the rear piston 23b. Inlet 31
Is formed. The starting gas is supplied from the starting gas containers 11-1, 11-2, 11-3 to the first fluid inlet 30.

On the other hand, the second fluid inlet 31 is constructed so as to communicate the gas flow passage 21 on the gas supply side 21a through the communication passage 33. In this communication passage 33, a valve opening sealing plate 32 as a shutoff mechanism is arranged, and a breaking device 34 as an opening device for opening the communication passage 33 by breaking the valve opening sealing plate 32. Is provided. In addition,
A relief valve 24b is attached near the second fluid inlet 31 of the cylinder 24.

As shown in FIG. 3, the decapsulating device 34 is
The valve opening sealing plate 32 is attached to the cutter 35a of the piston rod 35.
It is constituted by a breaking cylinder 36 that is broken by. Behind the piston 37 of the breaking cylinder 36, there is formed a gas injection port 38 to which a gas generator (not shown) which is remotely operated can be connected, if necessary. As shown in the figure, a manual knob 39 is provided as a manual operation mechanism that directly pushes out the piston 37.

Next, the operation of the pressure reducing container valve 2 will be described. For example, the starting gas containers 11-1, 11-
By supplying the starting gas to the first fluid injection port 30 from 2, 11-3, as shown in FIG.
The rear piston 23b through the step 2 of the cylinder 24
Move to position 8. As a result, the spring member 27 is compressed, and the front piston 23a urged by the spring force of the spring member 27 presses the passage valve 22 via the piston rod 26 to open the gas passage 21.

On the other hand, as shown in FIG. 3, the piston 37 of the breaking cylinder 36 is moved by the manual knob 39 of the breaking device 34 or a gas generator (not shown) to move the cutter 35.
When the valve opening sealing plate 32 is ruptured by a, the gas of the fire extinguishing agent gas storage container 1 is supplied to the second fluid inlet 31 from the gas supply side 21a of the gas flow path 21 through the communication passage 33, As illustrated, the rear piston 23b is moved to the position of the step 28 of the cylinder 24. As a result, the spring member 27 is compressed, and the front piston 23a urged by the spring force of the spring member 27 presses the passage valve 22 via the piston rod 26 to open the gas passage 21.

That is, in the pressure reducing container valve 2 of the present embodiment, the opening degree of the flow path valve 22 is set only by the spring force of the spring member 27 arranged between the divided pistons 23a and 23b, and the rear piston 23b. Since it is not necessary to consider the pressure of the starting gas and the like, it is possible to easily and accurately set the opening degree of the flow path valve 22. Further, since the spring member 27 is in a state in which no load is applied except at the time of starting, the spring force does not change with time, and the flow path valve 22
It is possible to always open the valve with a stable opening.

By applying the pressure reducing container valve 2 to a gas-based fire extinguishing equipment, the filling pressure of the inert fire extinguishing agent gas can be increased without increasing the pressure resistance grade of the secondary equipment of the fire extinguishing equipment, and the gas can be supplied. Even when the side gas pressure decreases, the spring member 27 automatically increases the opening degree of the flow path valve 22 in accordance with the decrease in the gas pressure, so that the amount of the inert fire extinguishing agent gas released is kept constant. You can

Furthermore, the two fluid inlets 30 and 31
Are separately divided by the auxiliary piston 29, for example, even if the pressure of the starting gas is applied to the first fluid injection port 30, this pressure is not applied to the second fluid injection port 31. It is possible to protect the valve opening sealing plate 32 and the like.

By the way, the decompression type container valve 2 has the first fluid inlet 30 and the gas supply side 2 to which the starting gas is supplied from the starting gas containers 11-1, 11-2 and 11-3.
The second fluid inlet 31 is formed so as to be communicated with the gas passage 21 of 1a and the communication passage 33 in which the valve opening sealing plate 32 is arranged, so that various starting methods of the gas fire extinguishing equipment can be selected. However, the configuration of the decompression type container valve for gas fire extinguishing equipment of the present invention is not limited to this decompression type container valve 2, and for example, as shown in FIG. 5 or FIG. Second
One of the fluid inlets 31 is omitted (see FIG. 5 (the first fluid inlet 30 is omitted) or FIG.
The other configuration of the modified example of the pressure reducing container valve shown in (the fluid inlet 31 is omitted) is the same as that of the pressure reducing container valve 2 described above. ), Etc., can be changed without departing from the spirit thereof.

Further, in this embodiment, the communication passage 33
Is provided with a valve opening sealing plate 32 as a shutoff mechanism, and by breaking the valve opening sealing plate 32, the communication passage 3
Although the breaking device 34 as an opening device for opening 3 is provided, the structure of the shutoff mechanism and the opening device is not limited to this, and for example, the opening device may be provided with the solenoid valve 34 shown in FIG.
A, specifically, a solenoid valve provided with a manual knob 39A as a manual operation mechanism that can be directly operated in addition to a function that can be remotely operated electrically operated by a solenoid, and is further cut off. Any shutoff mechanism or opening device having the same function as the valve opening sealing plate 32 or the breaking device 34, such as applying the pilot valve 32A opened by the operation rod 35b of the solenoid valve 34A shown in FIG. 8 to the mechanism. Can be used.

[0032]

According to the pressure reducing container valve for a gas fire extinguisher of the present invention, the filling pressure of the inert fire extinguishing agent gas can be increased without increasing the pressure resistance grade of the secondary equipment of the fire extinguisher. Even when the supply side gas pressure is reduced, the amount of the inert fire extinguishing agent gas released can be kept constant. Then, in particular, a spring member is interposed between the divided pistons, and the sliding range of the rear piston is configured to be regulated, and the opening degree of the flow path valve is adjusted by setting the spring force of the spring member, so that the gas Since it is configured to set the outlet side pressure of the flow path, it is not necessary to consider the pressure of the starting gas applied to the piston when setting the opening degree of the flow path valve. Thus, the opening degree of the flow path valve can be set easily and accurately. Further, since the spring member is in a state in which no load is applied except at the time of starting, the spring force does not change with time, and it is possible to always open the flow path valve at a stable opening degree.

Further, by dividing the two fluid inlets separately by the auxiliary piston, even if the pressure of the starting gas is applied to one of the fluid inlets, this pressure is applied to the other fluid inlet. This makes it possible to protect, for example, the valve opening sealing plate of the shutoff mechanism.

Further, by using as the opening device a remote operation mechanism for remotely opening the shutoff mechanism and / or a manual operation mechanism for directly manually opening the shutoff mechanism, use of the gas fire extinguishing equipment Aspects can be diversified, and in particular, by adopting one having a manual operation mechanism for directly opening the shutoff mechanism,
Even if the remote control mechanism does not operate because the power supply (including the emergency power supply) is cut off, the gas fire extinguishing equipment can be started manually.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a gas fire extinguishing facility.

FIG. 2 is a cross-sectional view showing an embodiment of a decompression type container valve for gas fire extinguishing equipment of the present invention.

FIG. 3 is a cross-sectional view showing a state in which the pressure reducing container valve is opened by a manual knob.

FIG. 4 is a cross-sectional view showing a state in which the pressure reducing container valve is opened by a starting gas.

FIG. 5 is a cross-sectional view showing an embodiment (modification) of a decompression type container valve for gas fire extinguishing equipment according to the present invention, in which (A) a closed state;
(B) shows a state in which the valve is opened.

FIG. 6 is a cross-sectional view showing an embodiment (modification) of a pressure reducing container valve for a gas fire extinguishing facility according to the present invention, (A) valve closed state,
(B) shows a state in which the valve is opened.

FIG. 7 is a cross-sectional view showing a closed state of an embodiment (modification) of a pressure reducing container valve for gas fire extinguishing equipment according to the present invention.

FIG. 8 is a cross-sectional view showing a closed state of an embodiment (modification) of a decompression type container valve for gas fire extinguishing equipment of the present invention.

[Explanation of symbols]

1 Extinguishant gas storage container 2 Pressure reducing container valve 21 gas flow path 22 Flow valve 23 pistons 23a front piston 23b rear piston 24 cylinders 24a Air vent hole 24b relief valve 25 valve springs 26 Piston rod 27 Spring member 28 steps 29 Auxiliary piston 30 First fluid inlet 31 Second fluid inlet 32 Valve opening sealing plate (shutoff mechanism) 32A pilot valve (shutoff mechanism) 33 passages 34 Sealing device (opening device) 34A solenoid valve (opening device) 35 Piston rod 35a cutter 35b operating rod 36 Breaking cylinder 37 pistons 38 Gas inlet 39 Manual knob (manual operation mechanism) 39A Manual knob (manual operation mechanism)

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A62C 3/06 A62C 35/00-39/00

Claims (3)

(57) [Claims] 1. A decompression type container valve for a gas fire extinguishing facility, comprising: a flow path valve provided in a gas flow path of an extinguishant gas storage container; and a cylinder for opening the flow path valve by pressing a piston to open the same. In the above, the piston of the cylinder is divided into front and rear parts, and the load is divided between the divided pistons except when starting.
In addition to interposing a spring member that is not applied, it regulates the sliding range of the rear piston ,
Move the piston to the regulation position within the sliding range of the cylinder.
The spring force of the spring member.
Front piston presses the flow path valve and opens the gas flow path.
A decompression type container valve for gas fire extinguishing equipment. 2. An auxiliary piston is formed behind the rear piston, a first fluid injection port is formed behind the auxiliary piston, and between the auxiliary piston and the rear piston,
The gas system according to claim 1, further comprising an opening device that forms a second fluid injection port by communicating the gas flow path on the gas supply side through a blocking mechanism and opens the blocking mechanism. Pressure reducing container valve for fire extinguishing equipment. 3. The gas according to claim 2, wherein the opening device includes a remote operation mechanism for remotely opening the shutoff mechanism and / or a manual operation mechanism for directly manually opening the shutoff mechanism. Pressure reducing container valve for fire extinguishing equipment.