JP5117518B2 - Gas fire extinguishing equipment - Google Patents

Description

  The present invention relates to a gas fire extinguishing equipment, and in particular, a reduced pressure configured such that an outlet side gas pressure P2 and a reference gas pressure P1 are applied at a predetermined area ratio in a sliding direction of a flow path valve disposed in a gas flow path. The present invention relates to a gas fire extinguishing equipment in which an inert fire extinguishing gas stored in a gas state in a fire extinguisher gas storage container is decompressed and discharged into a fire extinguishing target section using the apparatus.

  Conventionally, as a fire extinguishing equipment that extinguishes fire by releasing a fire extinguisher into the fire extinguishing target section and maintaining the extinguishing agent concentration in the fire extinguishing target section above the fire extinguishing concentration, carbon dioxide, halon gas, etc. Those using an inert gas have been put into practical use.

  By the way, when using an inert gas such as carbon dioxide or halon gas as a fire extinguisher, these fire extinguishing agents are liquefied and stored in a fire extinguishing facility in a state of being filled in a fire extinguisher gas storage container consisting of a high pressure gas container. In the event of a fire, use appropriate electrical or pneumatic means to open the container valve of the fire extinguisher gas storage container so that carbon dioxide and halon gas can be piped from the fire extinguisher gas storage container. To the ejection head and discharged from the ejection head into the fire extinguishing target section. At this time, the inert gas such as carbon dioxide and halon gas is sent in a liquid state up to the ejection head and is vaporized into a gas state at the moment when it is discharged from the ejection head into the fire extinguishing target section. To fill the fire and suppress the fire.

  And these gas fire extinguishing equipment using inert gas such as carbon dioxide and halon gas can quickly suppress fire, there is almost no pollution in the fire extinguishing target area by the fire extinguishing agent, and electrical insulation is not impaired. In addition, the fire extinguishing agent penetrates through the gap and can exert a strong fire extinguishing effect even for fire extinguishing objects with a complicated structure, and there is no secular change of the extinguishing agent and it has a certain fire extinguishing ability over a long period of time. Therefore, it is widely used not only for oil-related facilities and electricity-related facilities but also for general facilities.

  However, in recent years, problems related to the destruction of the ozone layer have been raised on a global scale, and production of fire extinguishing agents containing halogenated hydrocarbon components such as halon gas was discontinued in January 1994. I can no longer do it.

On the other hand, fire extinguishing equipment using carbon dioxide as a fire extinguishing agent is known to have the following problems.
(1) The design concentration of carbon dioxide in the fire extinguishing target compartment at the time of fire extinguishing is about 35%. If there is a person in the fire extinguishing target compartment at this concentration, the toxicity of carbon dioxide (anesthetic properties) ) May cause a situation involving human life.
(2) In the event of a fire, carbon dioxide is sent in a liquid state up to the ejection head, and is vaporized into a gaseous state at the moment when it is discharged from the ejection head into the fire extinguishing target compartment. In order to take away the heat of vaporization, the saturated vapor pressure of the indoor air is reduced, moisture in the air is condensed, and static electricity is generated. As a result, the interior of the room is fogged, which may hinder human evacuation and rescue and fire fighting, and may cause serious secondary disasters due to poor insulation or malfunction of electronic equipment due to condensation or static electricity. is there.
(3) Since the density of carbon dioxide is much higher than that of air, the carbon dioxide released in the fire extinguishing target section stays in the lower part of the fire extinguishing target section and the fire extinguishing effect is reduced. Easy to dissipate from the lower opening.
(4) Since problems related to global warming have been raised on a global scale, carbon dioxide may be used in the future in the same way as halon gas.

By the way, in order to solve the many problems of the conventional gas fire extinguishing equipment, the applicant of the present invention has previously introduced a perfluoroalkane (perfluorobutane (C ₄₎ that does not destroy the ozone layer with nitrogen gas or nitrogen gas. F ₁₀ )), hydrogenofluoroalkane (trifluoromethane (CHF ₃ ), heptafluoropropane (C ₃ HF ₇ ) or pentafluoroethane (C ₂ HF ₅ )) or hydrogenofluorohalogenoalkane (iodotrifluoromethane ( CF ₃ I)) (hereinafter collectively referred to as “fluorine compounds”) mixed gas (hereinafter simply referred to as “mixed gas”) in which at least one kind is mixed at a ratio of 10% by volume or less. Gas-based fire extinguishing equipment used as an agent was proposed (see Patent Documents 1 and 2).

However, even when nitrogen gas or mixed gas is used as a fire extinguisher for gas fire extinguishing equipment, it has been found that there are the following problems.
(1) Nitrogen gas or mixed gas as a fire extinguisher of gas fire extinguishing equipment uses what is pressurized and stored in a gas state, so carbon dioxide or a gas stored in a pressurized state is used. Compared to halon gas, the number of extinguishing agent gas storage containers required for extinguishing the fire extinguishing target section of the same volume is required several times, and a large installation space for the extinguishing agent gas storage container is required.
(2) In order to reduce the number of fire extinguishing agent gas storage containers to be installed, it is necessary to increase the filling pressure of the inert fire extinguishing agent gas filling the fire extinguishing agent gas storage container. Therefore, the secondary side equipment of the fire extinguishing equipment such as the selection valve, main pipe, branch pipe, injection head, etc. will be subjected to a high gas pressure of the inert fire extinguishing agent gas. The pressure-resistant grade needs to be raised, and the equipment cost becomes remarkably high, and it cannot be applied to existing equipment.

  Therefore, the present applicant reduces the high-pressure supply-side gas pressure to a predetermined outlet-side gas pressure in order to solve the above-described problems when nitrogen gas or a mixed gas is used as a fire extinguishing agent for a gas fire extinguishing facility. For example, when applied to a gas fire extinguishing equipment, a decompression device capable of increasing the filling pressure of the inert fire extinguishing gas without increasing the pressure resistance grade of the secondary equipment of the gas fire extinguishing equipment (See Patent Documents 3 to 4).

JP-A-8-141102 JP-A-8-243186 JP-A-8-299492 JP-A-9-319439

By the way, the decompression device described above uses a decompression device configured such that the outlet side gas pressure P2 and the reference gas pressure P1 are applied in a predetermined area ratio in the sliding direction of the flow path valve disposed in the gas flow path. Inert extinguishing agent gas stored in a fire extinguisher gas storage container in a gaseous state is decompressed and released into the fire extinguishing target area. However, in actual gas fire extinguishing equipment, due to legal restrictions, etc. As a starting gas for starting the gas fire extinguishing equipment, a starting gas container filled with carbon dioxide in a liquid state is used.
For this reason, in addition to the starter gas container, a constant pressure gas container for storing the gas of the reference gas pressure P1 is prepared, and the starter gas released from the starter gas container is used for various devices constituting the gas fire extinguishing equipment It is necessary to provide two systems of gas pipelines, which are a startup gas pipeline that is supplied to the gas generator and a constant-pressure gas pipeline that supplies a constant-pressure gas having a reference gas pressure P1 discharged from the constant-pressure gas container to the decompression device.
Moreover, since the gas pressure of the starting gas released from the starting gas container filled with carbon dioxide in a liquid state is usually about 9 MPa, the schedule 40 cannot be used as a carbon steel pipe for pressure piping. An expensive schedule 80 was used.
For these reasons, the conventional gas fire extinguishing equipment has a problem that the construction of the starting gas pipe and the constant pressure gas pipe is complicated and the construction cost of the equipment is high.

  In view of the problems of the conventional gas fire extinguishing equipment, the present invention provides a gas fire extinguishing equipment that can simplify the construction of the starting gas pipe and the constant pressure gas pipe and reduce the construction cost of the equipment. The first purpose is to provide it.

  In addition, the present invention provides a gas fire extinguishing equipment that makes it possible to use the carbon steel pipe for pressure piping of the schedule 40 for the starting gas pipe and the constant pressure gas pipe, thereby reducing the construction cost of the equipment. This is the second purpose.

In order to achieve the above object, the gas fire extinguishing system of the present invention is such that the outlet side gas pressure P2 and the reference gas pressure P1 are applied at a predetermined area ratio in the sliding direction of the flow path valve disposed in the gas flow path. In the gas fire extinguishing equipment in which the nitrogen gas stored in a gas state in the fire extinguisher gas storage container is depressurized and released into the fire extinguishing target section using the decompression device configured as described above, carbon dioxide is in a liquid state. A constant pressure circuit breaker is provided to suppress the gas pressure P3 of the starting gas that starts the gas fire extinguishing equipment released from the filled starting gas container to the reference gas pressure P1 or less, and the starting gas discharged from the starting gas container A selection valve opening device for opening a selection valve for selectively supplying nitrogen gas to a fire extinguishing target section via a constant pressure circuit breaker and a starting gas line, and a line control valve disposed in the starting gas line , start-up for gas pipe, fire fighting Pressure gas container valve to open the pressure gas container valve for pressure gas container which stores the extinguishing agent gas storage vessel valve opening device and a nitrogen gas of the reference gas pressure P1 opens the extinguishing agent gas storage vessel valve of the gas storage vessel opening A gas having a reference gas pressure P1 released from the constant pressure gas container whose constant pressure gas container valve is opened by supplying the starting gas is supplied to the apparatus via the starting gas line. The reference gas pressure P1 is applied to the flow path valve by supplying to the storage container valve.

  In this case, the gas pressure P3 of the starting gas for starting the gas fire extinguishing equipment is suppressed to 6.5 MP or less by the constant pressure circuit breaker, and the reference gas pressure P1 of the gas released from the constant pressure gas container is set to 6. It can be set to 5 MP or less.

According to the gas fire extinguishing equipment of the present invention, the constant pressure for suppressing the gas pressure P3 of the starting gas for starting the gas fire extinguishing equipment released from the starting gas container filled with carbon dioxide in a liquid state to be equal to or lower than the reference gas pressure P1. A circuit breaker is provided, and a selection valve that selectively supplies nitrogen gas to the fire extinguishing target section through the constant pressure circuit breaker and the activation gas line is opened for the activation gas released from the activation gas container. Selection valve opening device, line control valve arranged in the starting gas line, starting gas line, extinguishing agent gas storage container valve opening device for opening the extinguishing agent gas storage container valve of the extinguishing agent gas storage container, and reference gas The constant pressure gas container valve opening device that opens the constant pressure gas container valve of the constant pressure gas container that stores the nitrogen gas at the pressure P1 is supplied to the constant pressure gas container valve opening device, and the constant pressure gas container valve is opened by supplying the starting gas. From gas container The gas having the reference gas pressure P1 is supplied to the fire extinguisher gas storage container valve through the gas line for start-up so that the reference gas pressure P1 is applied to the flow path valve. A part of the path can be shared as a constant pressure gas pipe, thereby simplifying the pipe structure and reducing the construction cost of the equipment.

Further, the gas pressure P3 of the starting gas for starting the gas fire extinguishing equipment is suppressed to 6.5MP or less by the constant pressure circuit breaker, and the reference gas pressure P1 of the gas released from the constant pressure gas container is set to 6.5MP or less. Therefore, the carbon steel pipe for pressure piping of the schedule 40 can be used for the starting gas pipe shared as the constant pressure gas pipe, and the construction cost of the equipment can be further reduced.
In addition, the existing gas fire extinguishing equipment piping system that uses various inert fire extinguishing gas (nitrogen, carbon dioxide, halon, NE-1, etc.) in the gas pipelines constituting the gas fire extinguishing equipment is used as it is. The gas fire extinguishing equipment of the present invention can be introduced.

It is explanatory drawing which shows one Example of the gas fire extinguishing equipment of this invention. An example of the decompression device used for the gas fire extinguishing equipment is shown, (a) shows when the flow path valve is closed, and (b) shows when the flow path valve is open. (A) is XX sectional drawing of FIG.2 (b), (b) is a development view of a gas supply port. It is a flowchart at the time of starting of the gas fire extinguishing equipment of this invention.

  Hereinafter, embodiments of the gas fire extinguishing equipment of the present invention will be described based on the drawings.

1 to 4 show an embodiment of the gas fire extinguishing equipment of the present invention.
This gas fire extinguishing equipment schematically shows the gas fire extinguishing equipment in the case of having three fire extinguishing target sections 6-1, 6-2, 6-3.
Gas system extinguishing equipment, as an inert extinguishing agent gas, using nitrogen gas, a state filled in the high pressure gas container pressurized so (but are not limited particularly, for example, at 35 ° C., 30 MPa) The fire extinguisher gas storage container 1 is used by storing in the fire extinguishing equipment.
The gas fire extinguishing equipment of this example includes nine extinguishing agent gas storage containers 1-1, 1-2, ..., 1-9, and each extinguishing agent gas storage container 1 stores extinguishing agent gas. The connecting pipe 3 is connected via the container valve 2, and the connecting pipe 3 is further connected to one collecting pipe 4, and this collecting pipe 4 is extended to each fire extinguishing target section 6-1, 6-2, 6-3. Connect to the installed main pipes 5-1, 5-2, 5-3. Selection valves 9-1, 9-2, and 9-3 are arranged in the main pipes 5-1, 5-2, and 5-3, and are selected as the fire extinguishing target sections 6-1, 6-2, and 6-3. Inert fire extinguishing agent gas should be sent.
The main pipes 5-1, 5-2, and 5-3 extended to the fire extinguishing target sections 6-1, 6-2, and 6-3 are respectively arranged in the fire extinguishing target sections 6-1, 6-2, and 6-3. The branch pipe is connected to a provided branch pipe (not shown), and this branch pipe is connected to a plurality of jet heads (not shown) arranged at appropriate positions in the fire extinguishing target sections 6-1, 6-2, 6-3.

By the way, normally, since the volume of each fire extinguishing object section 6-1, 6-2, 6-3 differs, naturally the quantity of the inert fire extinguishing agent gas required for extinguishing fires also differs.
For this reason, if necessary, the diameters of the main pipes 5-1, 5-2, and 5-3 are changed according to the volumes of the fire extinguishing target sections 6-1, 6-2, and 6-3. At this time, the gas fire extinguishing equipment is configured such that the number of fire extinguishing agent gas storage containers 1 corresponding to the fire extinguishing target sections 6-1, 6-2, 6-3 to be fire extinguisher is opened.

  Here, the number of extinguishing agent gas storage containers 1 to be opened is set to 2 for the extinguishing target section 6-1, 9 for the extinguishing target section 6-2, and 7 for the extinguishing target section 6-3. To do.

Here, in the figure, 7-1, 7-2, 7-3 are pressure switches for detecting the pressure of the released inert extinguishing gas, 8 is a safety device, 9-1, 9-2, 9-3. Are selection valves, 10-1, 10-2 and 10-3 are selective valve opening devices provided with non-return valves, and 11-1, 11-2 and 11-3 are start-up gases filled with carbon dioxide in a liquid state. The containers 11a-1, 11a-2, and 11a-3 are gas pressures P3 of the starting gas for starting the gas fire extinguishing equipment released from the starting gas containers 11-1, 11-2, and 11-3, and a constant pressure. Constant pressure circuit breakers 12-1, 12-2, which are suppressed to a reference gas pressure P1 or less of nitrogen gas stored in the gas container 15 (for example, but not limited to, 6.5 MPa at 35 ° C.) 12-3 is a solenoid for opening the starting gas container.
And the constant pressure circuit breakers 11a-1, 11a-2, 11a-3 are supplied with the gas pressure P3 of the starting gas by the carbon dioxide released from the starting gas containers 11-1, 11-2, 11-3. Regardless of the pressure, any mechanism that can be suppressed to the reference gas pressure P1 or lower, such as a shut-off valve or a pressure reducing valve, can be used.

  In the figure, reference numerals 13-0, 13-1, 13-2, and 13-3 denote start-up gas pipelines that are discharged from the start-up gas containers 11-1, 11-2, and 11-3, and are constant pressure circuit breakers. 11a-1, 11a-2, 11a-3, the start-up gas suppressed to a pressure equal to or lower than the reference gas pressure P1 is selectively deactivated in the fire extinguishing target sections 6-1, 6-2, 6-3. Selection valve opening devices 10-1, 10-2, 10-3 for opening gas selection valves 9-1, 9-2, 9-3, line control valves 14-A, 14-B, extinguishing agent gas The storage container 1-1, 1-2, ..., 1-9, the extinguishing agent gas storage container valve opening device 20 for opening the extinguishing agent gas storage container valve 2 and the constant pressure storing the gas of the reference gas pressure P1. While supplying the constant pressure gas container valve opening device 16a for opening the constant pressure gas container valve 16 of the gas container 15, the starting gas is supplied. Is supplied from the constant pressure gas container 15 whose constant pressure gas container valve 16 is opened, and the gas with the reference gas pressure P1 is discharged via the start gas line 13-0 to the extinguishing agent gas storage container valve 2. The reference gas pressure P1 is applied to the flow path valve 22 of the fire extinguisher gas storage container valve 2 to be described later.

Here, the passable direction of the non-return valve attached to the selection valve opening devices 10-1, 10-2, 10-3 is represented by the direction of the arrow indicated by ▲ in the figure.
Similarly, the direction in which the line control valves 14-A and 14-B can pass is indicated by the direction of ▲ in the figure, but the passages of the line control valves 14-A and 14-B are once opened. Then, an open state of the passage is maintained, and the passage having a structure in which the passage is possible in both directions is used, and the starting gas pipe 13-is connected to the connection port A of the line control valve 14 -A. 0, the upstream side of the starting gas line 13-0 (starting gas line 13-2) at the connection port B, and the starting gas line 13- at the connection port C. 3, the downstream side of the starting gas line 13-0 at the connection port A of the line control valve 14 -B, and the upstream side of the starting gas line 13-0 at the connection port B Are connected to the connection port C, respectively.

  The numbers 1, 2, and 3 at the end of the above members (excluding the extinguishing agent gas storage containers 1-1, 1-2, ..., 1-9) are the numbers 1, 2, and 3 at the end of the fire extinguishing target section. Each corresponds to 3.

  The extinguishing agent gas storage container valve 2 disposed in the extinguishing agent gas storage container 1 has a reference of nitrogen gas stored in the constant pressure gas container 15 with the high-pressure supply-side gas pressure P0 shown in FIGS. A depressurization device that can depressurize to a predetermined outlet-side gas pressure P2 defined by the gas pressure P1 (for example, at 35 ° C., but 6.5 MPa) is used.

  The decompression device applies a supply-side gas pressure P0 to the flow path valve 22 disposed in the gas flow path 21 in a direction orthogonal to the sliding direction of the flow path valve 22, and the flow path valve 22 The outlet side gas pressure P2 and the reference gas pressure P1 are applied in a predetermined area ratio in the sliding direction.

More specifically, the flow path valve 22 disposed in the gas flow path 21 is constituted by a dome-shaped tubular valve body, and the peripheral wall 22a of this valve body is slid in parallel with the opening surface of the gas supply port 21a. As a result, the gas supply port 21a is opened and closed, and the outlet side gas pressure P2 is introduced to the outer top surface 22c of the valve body from the connection port as the extinguishing agent gas storage container valve opening device 20 to the inner top surface 22d. The reference gas pressure P1 of the nitrogen gas discharged from the constant pressure gas container 15 is configured so as to be applied thereto.
In this decompression device, the flow path valve 22 disposed in the gas flow path 21 is not affected by the supply side gas pressure P0, can stably maintain the outlet side gas pressure P2, and has a simple structure, It can be manufactured at low cost with few points.
Here, the terms “cylinder-shaped”, “outer top surface”, and “inner top surface” are used for convenience because the decompression device is usually used in the state shown in FIG. However, the terminology does not limit the installation direction of the decompression device, and for example, it does not exclude use in a direction opposite to the state shown in FIG.

In this case, the flow path valve 22 formed of a celestial tubular valve body is urged in the direction of closing the gas supply port 21a by the spring constant spring 23 that does not affect the reference gas pressure P1. Like that.
When the flow path valve 22 is in a closed state, the inner surface of the peripheral wall 22a is in sliding contact with O-rings 24a and 24b disposed on both upper and lower sides of the gas supply port 21a (FIG. 2 (a )), The gas supply port 21a is sealed, and the opening side of the flow path valve 22 and the inner space of the inner top surface 22d are always shut off.
The flow path valve 22 slides along a constant pressure gas supply pipe 25 for introducing the reference gas pressure P1 from a constant pressure gas source that penetrates the top portion 22b and enters the inner space of the inner top surface 22d. Like that.
Further, the constant pressure gas supply pipe 25 is in sliding contact with an O-ring 24c disposed in the through hole of the top portion 22b of the flow path valve 22, so that the inner space of the inner top surface 22d is blocked from the outside.

Further, as shown in FIG. 3A, the gas supply ports 21a are formed symmetrically in the radial direction, more specifically, at an angular interval of 90 ° in the four directions. Note that the direction (angular interval) of the gas supply port 21a is not limited to that of the present embodiment, but in the case of two directions, the angular interval of 180 °, in the case of three directions, the angular interval of 120 °, n ( In the case of the (n: integer of 2 or more) direction, it is set to be point-symmetric in the radial direction, such as an angular interval of 360 ° / n.
Thereby, the influence of the supply side gas pressure P0 which the flow path valve 22 arrange | positioned in the gas flow path 21 receives can be offset, and the influence of the supply side gas pressure P0 can be decreased.

Further, as shown in FIG. 3B, the gas supply port 21a is formed in a deformed shape in which the opening size gradually increases upward.
This makes it possible to accurately adjust the gas flow rate according to fluctuations in the supply-side gas pressure P0, particularly when the supply-side gas pressure P0 with a small gas flow rate is high. The influence of fluctuations in P0 can be reduced.
In addition, the shape of the gas supply port 21a is not limited to the above shape, and may be formed in an arbitrary shape such as a circle, an oval, and a rectangle.

Here, the pressure reducing device substantially cancels the area where the outlet side gas pressure P2 is applied, and then substantially determines the area where the outlet side gas pressure P2 is substantially applied and the area where the reference gas pressure P1 is substantially applied. By making them equal, the outlet side gas pressure P2 matches the reference gas pressure P1.
Specifically, if the area of the inner top surface 22d of the flow path valve 22 is A1 and the area of the constant pressure gas supply pipe 25 is A2 after offsetting the area where the outlet side gas pressure P2 is applied, the following formula (1 ) Is established, and the outlet side gas pressure P2 matches the reference gas pressure P1 regardless of the magnitude (variation) of the supply side gas pressure P0.
P2 × (A1-A2) = P1 × (A1-A2) (1)
Thereby, control of an exit side gas pressure can be performed simply.

Next, the operation of the extinguishing agent gas storage container valve 2 composed of this decompression device will be described.
Inside the inner space of the inner top surface 22d from the constant pressure gas container 15 through the start gas line 13-0, the extinguishing agent gas storage container valve opening device 20 of the extinguishing agent gas storage container valve 2, and the constant pressure gas supply pipe 25. By supplying the nitrogen gas at the reference gas pressure P1, the flow path valve 22 is moved upward as shown in FIGS. 2 (a) to 2 (b) against the biasing force of the spring 23 to supply the gas. The mouth 21a is opened.
When the gas supply port 21a is opened, the inert fire extinguishing agent gas flows from the fire extinguishing agent gas storage container 1 to the gas outlet side 21b of the gas passage 21, and the outer top surface of the passage valve 22 is adjusted accordingly. The outlet side gas pressure P2 is also applied to 22c.
Therefore, according to the above equation (1), the flow path valve 22 is instantaneously balanced, and in this example, the outlet side gas pressure P2 is held at a value equal to the reference gas pressure P1 of the constant pressure gas container 15. .

In this case, the outlet side gas pressure P2 held by the extinguishing agent gas storage container valve 2 comprising this decompression device adjusts the constant pressure gas source, that is, the reference gas pressure P1 itself of the constant pressure gas container 15, or the constant pressure gas. A pressure regulator is disposed in the container 15 and can be changed by adjusting the reference gas pressure P1 with this pressure regulator or by changing the shape of the flow path valve 22, but the inert gas fire extinguishing equipment In terms of design, it is desirable that the outlet side gas pressure P2 be maintained at a value equal to the reference gas pressure P1.
The extinguishing agent gas storage container valve 2 comprising a decompression device stops the supply of nitrogen gas from the constant pressure gas source, that is, the constant pressure gas container 15, and discharges the nitrogen gas in the constant pressure gas supply pipe 25. The gas supply port 21a has a function capable of being closed, and the fire extinguisher gas storage container once opened can be configured to be closed using this function.

Next, the operation | movement at the time of the fire of said gas fire extinguishing equipment is demonstrated.
Now, assuming that a fire has occurred in the fire extinguishing target section 6-1, when the fire finder operates a push button (in the case of manual operation) corresponding to the fire extinguishing target section 6-1, the electrical signal is opened to the start gas container. The solenoid 12-1 is operated and the activation gas container 11-1 is opened.
The start-up gas released by opening the start-up gas container 11-1 is first introduced into the selection valve opening device 10-1 to open the selection valve 9-1, and then the selection valve opening device 10 is opened. -1 passes through the start-up gas line 13-1 through the non-return valve attached to -1, passes through part C of the line control valve 14-B, passes through the start-up gas line 13-0, and stores the fire extinguisher gas. The fire extinguishing agent gas storage container valve opening device 20 that opens the fire extinguishing agent gas storage container valve 2 of the containers 1-8 and 1-9 is supplied to the fire extinguishing agent gas storage container valve 2 to be temporarily opened. The constant pressure gas container valve 16 is supplied to a constant pressure gas container valve opening device 16a for opening the constant pressure gas container valve 16 to open the constant pressure gas container valve 16.
When the constant pressure gas container valve 16 is opened, the nitrogen gas having the reference gas pressure P1 stored in the constant pressure gas container 15 passes through the starting gas line 13-0, the fire extinguishing agent gas storage container 1-8, The fire extinguishing agent gas storage container valve 2 is supplied to the extinguishing agent gas storage container valve opening device 20.
At this time, since the nitrogen gas having the reference gas pressure P1 cannot pass through part B of the line control valve 14-B, the extinguishing agent gas storage container valve 2 from the extinguishing agent gas storage container 1-7 is not opened.
By the way, the extinguishing agent gas storage container valve 2 uses a decompression device capable of reducing the high-pressure supply-side gas pressure P0 to a predetermined outlet-side gas pressure P2 defined by the reference gas pressure P1 from the constant-pressure gas source. Therefore, the inert fire extinguishing gas regulated to the reference gas pressure P1 from the two opened fire extinguishing agent gas storage containers 1-8, 1-9, the extinguishing agent gas storage container valve 2, the connecting pipe 3, It is discharged into the fire extinguishing target section 6-1 through the collecting pipe 4, the selection valve 9-1 and the main pipe 5-1, and fire extinguishing is performed.

Further, if a fire has occurred in the fire extinguishing target section 6-2, when the fire finder operates a push button (in the case of manual operation) corresponding to the fire extinguishing target section 6-2, an electrical signal is opened to the start gas container. Is sent to the solenoid 12-2 for operation, and the solenoid 12-2 is operated to open the starting gas container 11-2.
The starting gas released by opening the starting gas container 11-2 is first introduced into the selection valve opening device 10-2 to open the selection valve 9-2, and then the selection valve opening device 10 is opened. -2 through the start-up gas line 13-2 and the start-up gas line 13-0 via the non-return valve attached to -2, the extinguishing agent gas storage container valve 1-1 of the extinguishing agent gas storage container 1-1, 1-2. Is supplied to the extinguishing agent gas storage container valve opening device 20 to temporarily open the extinguishing agent gas storage container valve 2, and further passes through part B of the line control valve 14 -A to start gas line 13. _0, supplied to the extinguishing agent gas storage container valve opening device 20 for opening the extinguishing agent gas storage container valve 2 of the extinguishing agent gas storage container 1-3,. The valve 2 is temporarily opened, and further passes through part B of the line control valve 14-B to start the gas pipe 13-0, and supplied to the extinguishing agent gas storage container valve opening device 20 for opening the extinguishing agent gas storage container valve 2 of the extinguishing agent gas storage containers 1-8 and 1-9. The constant pressure gas container valve 16 is supplied to a constant pressure gas container valve opening device 16a that opens the constant pressure gas container valve 16 of the constant pressure gas container 15 temporarily, and opens the constant pressure gas container valve 16.
When the constant pressure gas container valve 16 is opened, the nitrogen gas of the reference gas pressure P1 stored in the constant pressure gas container 15 passes through the starting gas pipe 13-0 and follows the reverse path. The fire extinguishing agent gas storage container 1-1, ..., 1-9 are supplied to the extinguishing agent gas storage container valve opening device 20 of the extinguishing agent gas storage container valve 2.
By the way, the extinguishing agent gas storage container valve 2 uses a decompression device capable of reducing the high-pressure supply-side gas pressure P0 to a predetermined outlet-side gas pressure P2 defined by the reference gas pressure P1 from the constant-pressure gas source. Therefore, the inert fire extinguishing gas regulated to the reference gas pressure P1 from the opened nine fire extinguishing gas storage containers 1-1,. It is discharged into the fire extinguishing target section 6-2 through the connecting pipe 3, the collecting pipe 4, the selection valve 9-2, and the main pipe 5-2, and fire extinguishing is performed.

Also, if a fire has occurred in the fire extinguishing target section 6-3, when the fire finder operates a push button (in the case of manual operation) corresponding to the fire extinguishing target section 6-3, the electrical signal is released from the start gas container. Is sent to the solenoid 12-3 for operation, and the solenoid 12-3 operates to open the starting gas container 11-3.
The starting gas released by opening the starting gas container 11-3 is first introduced into the selection valve opening device 10-3 to open the selection valve 9-3, and then the selection valve opening device 10 is opened. 3 through the start-up gas line 13-3 through the non-return valve attached to -3, through part C of the line control valve 14-A, and through the start-up gas line 13-0 to store the extinguishing agent gas Supplied to the extinguishing agent gas storage container valve opening device 20 for opening the extinguishing agent gas storage container valve 2 of the containers 1-3, ..., 1-7, temporarily opening the extinguishing agent gas storage container valve 2, Extinguishing agent that passes through part B of the line control valve 14-B, passes through the starting gas line 13-0, and opens the extinguishing agent gas storage container valve 2 of the extinguishing agent gas storage containers 1-8 and 1-9. The gas storage container valve opening device 20 is supplied, the fire extinguishing agent gas storage container valve 2 is temporarily opened, and further a constant pressure gas It is supplied to the constant pressure gas container valve opening device 16a for opening the pressure gas container valve 16 of the vessel 15, to open the pressure gas container valve 16.
When the constant pressure gas container valve 16 is opened, the nitrogen gas of the reference gas pressure P1 stored in the constant pressure gas container 15 passes through the starting gas pipe 13-0 and follows the reverse path. , 1-9, the extinguishing agent gas storage container valve 2 of the extinguishing agent gas storage container valve 2 is supplied.
By the way, the extinguishing agent gas storage container valve 2 uses a decompression device capable of reducing the high-pressure supply-side gas pressure P0 to a predetermined outlet-side gas pressure P2 defined by the reference gas pressure P1 from the constant-pressure gas source. Therefore, the seven extinguishant gas storage containers 1-3,..., 1-9 opened to the inert gas controlled by the reference gas pressure P1 are used as the extinguishing gas storage container valve 2, It is discharged into the fire extinguishing target section 6-3 through the connecting pipe 3, the collecting pipe 4, the selection valve 9-3 and the main pipe 5-3, and fire extinguishing is performed.

  As described above, the case where the number of fire extinguishing target sections is three and the number of fire extinguishing agent gas storage containers 1 is nine has been described as an example. The number of the agent gas storage containers 1 is not limited to that of the present embodiment, and can be arbitrarily set as necessary.

According to this gas fire extinguishing equipment, the starting gas pipe 13-0 can be shared as a constant pressure gas pipe, thereby simplifying the pipe construction and reducing the construction cost of the equipment. Become.
Further, the constant pressure circuit breaker 11a suppresses the gas pressure P3 of the starting gas for starting the gas fire extinguishing equipment to 6.5 MP or less, and the reference gas pressure P1 of the gas released from the constant pressure gas container 15 is set to 6. By setting it to 5MP or less, it becomes possible to use the carbon steel pipe for pressure piping of the schedule 40 for the starting gas pipes 13 and 13-0 shared as the constant pressure gas pipe, and the construction cost of the equipment Can be further reduced.
In addition, the existing gas fire extinguishing equipment piping system that uses various inert fire extinguishing gas (nitrogen, carbon dioxide, halon, NE-1, etc.) in the gas pipelines constituting the gas fire extinguishing equipment is used as it is. The gas fire extinguishing equipment of the present invention can be introduced.

  Further, by using the extinguishing agent gas storage container valve 2 as a decompression device, the structure can be simplified, the number of parts can be reduced, and the cost can be reduced, and the value of the outlet side gas pressure P2 is set to the reference gas pressure P1. It is possible to adjust in a wide range and with high accuracy by changing.

  As described above, the gas fire extinguishing equipment of the present invention has been described based on the embodiments thereof, but the present invention is not limited to the configurations described in the above embodiments, and the configurations thereof are appropriately set within the scope not departing from the gist thereof. It can be changed.

  The gas fire extinguishing equipment according to the present invention can simplify the construction of the starting gas pipe and the constant pressure gas pipe to reduce the construction cost of the equipment, and can schedule the starting gas pipe and the constant pressure gas pipe. It is possible to use 40 carbon steel pipes for pressure piping, and it has the characteristic that the construction cost of equipment can be reduced, so gas-based fire extinguishing using inert fire extinguishing gas such as nitrogen gas In addition to being suitable for use in facilities, for example, the piping system of existing gas fire extinguishing equipment that uses various inert fire extinguishing gas (nitrogen, carbon dioxide, halon, NE-1, etc.) can be used as it is. It can also be used for applications that introduce gas fire extinguishing equipment.

DESCRIPTION OF SYMBOLS 1 Extinguishing agent gas storage container 2 Extinguishing agent gas storage container valve 20 Extinguishing agent gas storage container valve opening device 21 Gas flow path 21a Gas supply port 21b Gas outlet side 22 Flow path valve 22a Peripheral wall 22b Top part 22c Outer top surface 22d Inner top Surface 22e Large diameter flange portion 22f Outer end face 22g Inner end face 23 Spring 24a O ring 24b O ring 24c O ring 25 Constant pressure gas supply pipe 6 Fire extinguishing target section 9 Selection valve 11 Start gas container 11a Constant pressure circuit breaker 13 Start gas pipe 13-0 Gas line for starting 10 Selection valve opening device 14 Line control valve 15 Constant pressure gas container 16 Constant pressure gas container valve 16a Constant pressure gas container valve opening device P0 Supply side gas pressure P1 Reference gas pressure P2 Outlet side gas pressure

Claims (2)

Extinguishing gas storage using a decompression device configured such that the outlet side gas pressure (P2) and the reference gas pressure (P1) are applied in a predetermined area ratio in the sliding direction of the flow path valve disposed in the gas flow path. In a gas fire extinguishing facility in which nitrogen gas stored in a gas state in a container is decompressed and discharged into a fire extinguishing target section, a gas system released from a starting gas container filled with carbon dioxide in a liquid state A constant pressure circuit breaker is installed to keep the gas pressure (P3) of the starting gas for starting the fire extinguishing system below the reference gas pressure (P1), and the starting gas released from the starting gas container A selection valve opening device that opens a selection valve that selectively supplies nitrogen gas to a fire-extinguishing target section via a gas pipeline, a line control valve arranged in the startup gas pipeline , a startup gas pipeline, and fire extinguishing Extinguishing agent gas storage container Supplies a constant pressure gas container valve opening device for opening the pressure gas container valve for pressure gas container that nitrogen gas storage extinguishant gas storage vessel valve opening device and a reference gas pressure opening (P1) and, for activation The gas of the reference gas pressure (P1) released from the constant pressure gas container whose constant pressure gas container valve is opened by supplying the gas is supplied to the fire extinguisher gas storage container valve through the starting gas line. A gas fire extinguishing system characterized in that a reference gas pressure (P1) is applied to the flow path valve.   The constant pressure circuit breaker suppresses the gas pressure (P3) of the starting gas for starting the gas fire extinguishing equipment to 6.5 MP or less, and the reference gas pressure (P1) of the gas released from the constant pressure gas container is set to 6. The gas fire extinguishing equipment according to claim 1, wherein the gas fire extinguishing equipment is set to 5MP or less.

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