JP2021041209A - Gas fire extinguishing equipment and construction method for the same - Google Patents

Abstract

To provide gas fire extinguishing equipment capable of achieving a reduction in construction cost and an increase in the degree of freedom of design.SOLUTION: Gas fire extinguishing equipment comprises a duct 2 for discharging fire extinguisher gas from a protected section 1 into which the fire extinguisher gas is introduced, and a volume increasing part 14 that is provided in the duct 2 and that serves as means for increasing a flow volume of the fire extinguisher gas within the duct 2. The volume increasing part 14 includes increasing at least either of the flow rate and density of the fire extinguisher gas. In addition, the volume increasing part 14 is provided within the duct 2 or outside the duct 2.SELECTED DRAWING: Figure 1

Description

The present invention relates to gas-based fire extinguishing equipment.

Conventionally, gas-based fire extinguishing equipment is disclosed in, for example, Japanese Patent Application Laid-Open No. 2014-108185 (Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-108185

The conventional gas-based fire extinguishing equipment has a problem that the construction cost is high and the degree of freedom in design is low. Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide a gas-based fire extinguishing system capable of reducing the construction cost and having a high degree of freedom in design. It is a thing.

The gas-based fire extinguishing equipment according to the present invention includes a duct for discharging the fire extinguishing agent gas from the protective zone into which the fire extinguishing agent gas is introduced, and a means provided in the duct to increase the flow rate of the fire extinguishing gas in the duct. Be prepared.

Preferably, the means of increasing the flow rate of the extinguishing agent gas comprises increasing at least one of the flow rates and densities of the extinguishing agent gas.

Preferably, a means for increasing the flow rate of the fire extinguishing agent gas is provided in the duct.
Preferably, the means for increasing the flow rate of the fire extinguishing agent gas is provided outside the duct.

Preferably, the means for increasing the flow rate of the extinguishing agent gas is to increase the flow rate of the extinguishing agent gas by a fan.

Preferably, the means for increasing the flow rate of the extinguishing agent gas increases the density of the extinguishing agent gas by cooling the extinguishing agent gas.

The gas-based fire extinguishing equipment according to another aspect of the present invention includes a duct for discharging the fire extinguishing agent gas from the protective zone into which the fire extinguishing agent gas is introduced, and the duct penetrates the building in which the protective zone is provided in the vertical direction. It is connected to the hole to be fired.

It is a schematic diagram of the gas fire extinguishing equipment according to Embodiment 1. It is sectional drawing along the line II-II in FIG. It is a schematic diagram which shows the duct enlarged. It is a schematic diagram of the gas fire extinguishing equipment according to the second embodiment. It is a schematic diagram of the gas fire extinguishing equipment according to the third embodiment. It is a schematic diagram of the gas fire extinguishing equipment according to Embodiment 4.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or corresponding parts are designated by the same reference numerals, and the description thereof will not be repeated. It is also possible to combine each embodiment.

(Embodiment 1)
The present inventor has analyzed the conventional problems, that is, the problems that the construction cost is high and the degree of freedom of design is low in the gas-based fire extinguishing equipment. As a result, regarding the cost of gas-based fire extinguishing equipment and the degree of freedom in design, it was found that the cost of the duct is high and the degree of freedom in design is narrowed.

The conventional duct extends from the protected area where the fire extinguishing gas is introduced to the outside of the building having the protected area. If the duct is thinner than before, the construction cost related to the duct can be reduced.

In addition, ducts extend vertically and / or horizontally within the building, which also affects the structure of the building. If the duct is thinner than before, the duct can be piped even in a narrow place where the duct could not be piped in the past, and the degree of freedom in design is increased.

With reference to FIGS. 1 to 3, the gas fire extinguishing equipment includes a pipe 3 for sending the fire extinguishing agent gas into the protected area 1 and a duct 2 connected to the protected area 1 for discharging the extinguishing agent gas.

The protected area 1 is a room provided in a building such as a building. In rooms where electronic devices are installed, water cannot be used to extinguish a fire, and a fire extinguishing agent gas is used to extinguish the fire. The fire can be extinguished by discharging the fire extinguishing gas agent from the injection nozzle 4 to the protective compartment 1 and filling the protective compartment 1 with the inert fire extinguishing agent gas to reduce the oxygen concentration. As the fire extinguishing agent gas, an inert gas such as nitrogen or argon or a halogen-based gas is used.

The duct 2 is a gas path for discharging the fire extinguishing agent gas of the protected compartment 1 from the protected compartment 1. The duct 2 is hollow and may be square or round. A damper 12 is provided at the end of the duct 2 at the pressure relief port 1a of the protection compartment 1, and the duct 2 and the protection compartment 1 are communicated with each other and cut off by opening and closing the damper 12. The damper 12 can rotate from the position described by the solid line to the position described by the dotted line. In this embodiment, only one duct 2 is provided in the protection zone 1, but a plurality of ducts 2 may be provided.

The duct 2 is provided with an increasing portion 14 for increasing the flow rate of the fire extinguishing agent gas in the duct. In this embodiment, the increase portion 14 is provided at the outlet 13 of the duct 2, but the increase portion 14 may be provided between the inlet (pressure relief port 1a) of the duct 2 and the outlet 13.

The increase unit 14 has a function of discharging the gas in the duct 2 to the outside of the duct 2 by, for example, a fan in order to increase the flow velocity of the fire extinguishing agent gas. The increase unit 14 generates a negative pressure and increases the pressure gradient between the pressure relief port 1a and the outlet 13, so that the flow velocity of the gas in the duct 2 can be increased.

As the power for driving the increase unit 14, for example, an emergency power source can be used. The increase unit 14 can move in the event of a fire, and there is a possibility that a normal power source cannot be used. Therefore, it is preferable to use an emergency power supply that is different from the normal power supply. The increase portion 14 may be provided inside the duct 2 or may be provided outside the duct 2.

The pipe 3 is a route for sending the fire extinguishing agent gas from the gas storage container 5 arranged outside the protection compartment 1 to the protection compartment 1. The pipe 3 is provided with an orifice 6, and the fire extinguishing agent gas that has passed through the orifice 6 is discharged to the protection section 1 via the injection nozzle 4.

That is, the gas-based fire extinguishing equipment is provided as a duct 2 for discharging the fire extinguishing agent gas from the protection section 1 into which the fire extinguishing agent gas is introduced and as a means for increasing the flow rate of the fire extinguishing agent gas in the duct 2 provided in the duct 2. It is provided with an increase unit 14 of the above. The weight increasing section 14 includes increasing at least one of the flow rate and density of the fire extinguishing agent gas.

In the gas-based fire extinguishing equipment configured as described above, since the flow velocity of the fire extinguishing agent gas can be increased by the increasing portion 14, the cross-sectional area of the duct 2 is larger than that in the case where the increasing portion 14 is not provided. Even if it is made small, it is possible to secure a sufficient flow rate of the fire extinguishing agent gas in the duct. As a result, the duct 2 can be miniaturized, and the construction cost can be reduced.

Further, as the duct 2 is miniaturized, the duct 2 can be piped in a narrow place where the duct 2 could not be piped in the past. As a result, design freedom is increased. Further, the duct 2 can be piped to the dead space of the building where the protection section 1 is provided.

(Embodiment 2)
With reference to FIG. 4, in the gas-based fire extinguishing system according to the second embodiment, a cooling unit 15 for cooling the duct 2 is provided. The density of the fire extinguishing agent gas in the duct 2 is related to the temperature, and the lower the temperature, the higher the density. Therefore, by cooling the duct 2 with the cooling unit 15, the density of the fire extinguishing agent gas in the duct 2 can be increased, and the flow rate of the fire extinguishing agent gas in the duct 2 can be increased.

The cooling unit 15 cools the duct 2, and is composed of, for example, a refrigerant pipe used for air conditioning of the protection section 1. When the air conditioner is cooling, the refrigerant whose temperature has decreased can be guided to the cooling unit 15 via the capillary, and the temperature of the duct 2 can be decreased. When the air conditioner is heating, a low-temperature refrigerant having a low enthalpy after providing heat to the room can be guided to the cooling unit 15 to lower the temperature of the duct 2.

In this embodiment, the cooling unit 15 is provided over the entire length of the duct 2, but it is sufficient that the cooling unit 15 is provided at least in a part thereof. Further, although the cooling unit 15 is provided over the entire circumference of the duct 2, it is sufficient that the cooling unit 15 is provided at least partially.

The gas-based fire extinguishing system configured in this way has the same effect as the gas-based fire extinguishing system according to the first embodiment.

(Embodiment 3)
In the gas-based fire extinguishing system according to the third embodiment with reference to FIG. 5, a part of the pipe 3 is branched to form a branch pipe 23, and the branch pipe 23 is guided into the duct 3. The fire extinguishing agent gas of the branch pipe 23 is discharged toward the outlet 13 near the outlet 13 in the duct 2. As a result, the vicinity of the outlet 13 becomes a negative pressure. By increasing the pressure gradient between the pressure relief port 1a and the outlet 13, the flow velocity of the gas in the duct 2 can be increased.

(Embodiment 4)
With reference to FIG. 6, in the gas-based fire extinguishing system according to the fourth embodiment, the duct 2 is connected to the hole 30 (shaft) of the building frame.

In the first to third embodiments, the duct is miniaturized by increasing the flow rate of the fire extinguishing agent gas in the duct 2. However, in the fourth embodiment, the total length of the duct 2 is shortened by connecting the holes 30 in the building instead of guiding the outlet 13 of the duct 2 to the outside of the building. This reduces the construction cost and increases the degree of freedom in design.

That is, the system fire extinguishing equipment includes a duct 2 for discharging the fire extinguishing agent gas from the protective section 1 into which the fire extinguishing agent gas is introduced, and the duct 2 is formed in a hole 30 that vertically penetrates the building in which the protective section 1 is provided. Be connected.

Although the embodiments of the present invention have been described above, the embodiments shown here can be variously modified. First, it is possible to combine each embodiment. In particular, embodiments 1 to 3 can be easily combined.

Further, regarding the combination of the first to third embodiments and the fourth embodiment, a part of the fire extinguishing agent gas of the protected compartment 1 is exhausted through the duct 2 of the first to third embodiments, and the remaining portion is exhausted from the duct 2 of the first embodiment. It is possible to exhaust air through the duct 2 of 4.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and it is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

The present invention can be used in the field of gas-based fire extinguishing equipment.

1 Protective compartment, 1a pressure shield, 2 duct, 3 piping, 4 injection nozzle, 5 gas storage container, 6 orifice, 12 damper, 13 outlet, 14 increase part, 15 cooling part, 23
Branch pipe, 30 holes.

Claims (7)

A duct for discharging the fire extinguishing gas from the protected area where the fire extinguishing gas is introduced, and
A gas-based fire extinguishing system provided in the duct and provided with a means for increasing the flow rate of the fire extinguishing agent gas in the duct. The gas-based fire extinguishing system according to claim 1, wherein the means for increasing the flow rate of the fire extinguishing agent gas includes increasing at least one of the flow velocity and the density of the fire extinguishing agent gas. The gas-based fire extinguishing system according to claim 1, wherein the means for increasing the flow rate of the fire extinguishing agent gas is provided in the duct. The gas-based fire extinguishing system according to claim 1, wherein the means for increasing the flow rate of the fire extinguishing agent gas is provided outside the duct. The gas-based fire extinguishing equipment according to claim 1, wherein the means for increasing the flow rate of the fire extinguishing agent gas is to increase the flow velocity of the fire extinguishing agent gas by a fan. The gas-based fire extinguishing equipment according to claim 1, wherein the means for increasing the flow rate of the extinguishing agent gas is to increase the density of the extinguishing agent gas by cooling the extinguishing agent gas. Equipped with a duct for discharging the fire extinguishing gas from the protected area where the fire extinguishing gas is introduced.
The duct is a gas-based fire extinguishing system connected to a hole that vertically penetrates a building in which the protection section is provided.

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