JP2023155342A - Gaseous system fire fighting equipment - Google Patents

Abstract

To provide gaseous system fire fighting equipment capable of reducing construction cost, and improving freedom degree of design.SOLUTION: The gaseous system fire fighting equipment comprises: plural gas storage containers 5 for storing fire fighting gas respectively; a piping 3 as introduction means for introducing fire fighting gas stored in the plural gas storage containers 5 to a protection zone 1; and a duct 2 for discharging the fire fighting gas from the protection zone 1 to which the fire fighting gas is introduced. A valve opening period of one of the plural gas storage containers 5 is set to be different from a valve opening period of other gas storage container, when the fire fighting gas is introduced to the protection zone 1.SELECTED DRAWING: Figure 1

Description

This invention relates to gas-based fire extinguishing equipment.

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

Japanese Patent Application Publication No. 2014-108185

Conventional gas-based fire extinguishing equipment has the problems of high construction costs and low flexibility in design. Therefore, this invention was made to solve the above problems, and aims to provide a gas-based fire extinguishing equipment that can reduce construction costs and has a high degree of freedom in design. It is something.

A gas-based fire extinguishing equipment according to one aspect of the present invention includes a plurality of containers storing extinguishing agent gas, an introduction means for introducing the extinguishing agent gas in the plurality of containers into a protected compartment, and a gas extinguishing agent gas stored in the extinguishing agent gas. and a duct for discharging the extinguishing agent gas from the protected compartment into which the extinguishing agent gas is introduced, and the extinguishing agent gas is introduced into the protected compartment by staggering the valve opening timing of one container and another of the plurality of containers. be done.

A gas-based fire extinguishing equipment according to another aspect of the invention includes a plurality of containers in which extinguishing agent gas is stored, an introduction means for introducing the extinguishing agent gas in the plurality of containers into a protected compartment, and a gas extinguishing agent gas It includes a duct for discharging the extinguishing agent gas from the protected compartment into which it is introduced, and a regulating valve provided on the introducing means to introduce the extinguishing agent gas into the protected compartment at a constant flow rate.

1 is a schematic diagram of gas fire extinguishing equipment according to Embodiment 1. FIG. 2 is a sectional view taken along line II-II in FIG. 1. FIG. It is a graph showing pressure changes during nitrogen extinguishing. It is a graph showing the pressure change during nitrogen extinguishing when the adjusted pressure is about 7 MPa. It is a graph showing the pressure change during nitrogen extinguishing when the adjusted pressure is about 5 MPa. It is a graph showing the pressure change during nitrogen extinguishing when the adjusted pressure is about 3-4 MPa. FIG. 3 is a schematic diagram of a gas fire extinguishing equipment according to a second embodiment. FIG. 7 is a schematic diagram of a regulating valve used in the gas fire extinguishing equipment according to the second embodiment.

Embodiments of the present invention will be described below with reference to the drawings. In the following embodiments, the same or corresponding parts are given 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 analyzed the conventional problems, namely, the high construction cost and low degree of freedom in design of gas-based fire extinguishing equipment. As a result, regarding the cost and design freedom of gas-based fire extinguishing equipment, the cost of piping to introduce the extinguishing agent gas and ducts to discharge the extinguishing agent gas is high, reducing the degree of freedom in design. Found the problem.

Conventional ducts extend from the protected area into which the extinguishing agent gas is introduced to the outside of the building containing the protected area. If the ducts were made thinner than before, construction costs associated with the ducts could be reduced. Making the pipes thinner can also reduce construction costs.

In addition, ducts extend vertically and/or laterally within a building and therefore influence the structure of the building. If the duct were made thinner than before, it would be possible to install the duct in narrow spaces where it was previously impossible to install the duct, increasing the degree of freedom in design. The thinner the piping, the greater the freedom in design.

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

The protection section 1 is a room provided in a building such as a building. In rooms with electronic equipment, water cannot be used to extinguish fires; extinguishing agent gas is used to extinguish fires. It is possible to extinguish the fire by discharging a fire extinguishing gas agent from the injection nozzle 4 into the protected compartment 1, filling the protected compartment 1 with inert fire extinguishing agent gas and reducing the oxygen concentration. As the extinguishing agent gas, inert gases such as nitrogen and argon, and halogen gases are used.

The duct 2 is a gas path for discharging the 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 escape port 1a of the protected compartment 1, and when the damper 12 opens and closes, the duct 2 and the protected compartment 1 are communicated with and disconnected from each other. The damper 12 is rotatable from a position indicated by a solid line to a position indicated by a dotted line. Although in this embodiment only one duct 2 is provided in the protected compartment 1, a plurality of ducts 2 may be provided.

The duct 2 extends from the inlet (pressure escape port 1a) to the outlet 13.
The pipe 3 is a route for sending extinguishing agent gas from the gas storage container 5 arranged outside the protected compartment 1 to the protected compartment 1 . The gas storage container 5 is provided with a pressure reducing valve (pressure regulator) 50, and the extinguishing agent gas that has passed through the pressure reducing valve 50 is discharged into the protected compartment 1 via the piping 3 and the injection nozzle 4.

A collecting pipe 17 is connected to the plurality of gas storage containers 5 . Extinguishing agent gas is supplied to the collecting pipe 17 from each gas storage container 5 . A control unit 15 that controls the supply of extinguishing agent gas from the gas storage container 5 to the collecting pipe 17 is connected to either the collecting pipe 17, the pressure reducing valve 50, or the gas storage container 5.

Referring to FIG. 3, a curve 101 shows the pressure of the fire extinguishing gas in one gas storage container 5. Curve 102 shows the pressure of the extinguishing gas agent at the outlet of container valve 17 when five gas storage containers 5 are opened simultaneously. A curve 103 shows the pressure of the fire extinguishing gas agent at the injection nozzle 4 when five gas storage containers 5 are opened at the same time. Point 105 indicates the maximum pressure on curve 102.

Curves 111 to 115 show the pressure of the fire extinguishing gas agent at the outlet of the pressure reducing valve 50 as a container valve when the first to fifth gas storage containers 5 are opened. Curve 104 shows the pressure of the extinguishing agent gas at the outlet of the pressure reducing valve 50, which is constituted by the sum of the extinguishing agent pressures shown in curves 111 to 115.

A point 105 indicates the maximum pressure on the curve 102, and the size of the pressure escape port 1a is determined in consideration of this maximum pressure. That is, if the maximum pressure indicated by point 105 is large, the diameter of the pressure escape port and the diameter of the duct 2 must be increased, which increases the construction cost. If the five gas storage containers 5 are opened at the same time, the peak pressures of the extinguishing agent gas released from each gas storage container 5 will overlap. As a result, the maximum pressure increases, and the diameters of the pressure escape port 1a and the duct 2 increase. On the other hand, by shifting the opening timings of the five gas storage containers 5, it is possible to prevent the peak pressures of the extinguishing agent gases discharged from the respective gas storage containers 5 shown by curves 111 to 115 from overlapping. As a result, the maximum pressure in curve 104 is less than the maximum pressure in curve 105. Therefore, it is possible to downsize the pressure escape port 1a and the duct 2. Furthermore, the pipe 3 can also be made thinner.

FIG. 3 shows a pressure reducing valve 50 in which flow rate control (pressure control) is not stable. Since the flow rate control is not stable, the outlet pressure of the pressure reducing valve 50 shown by the curve 102 is also not stable.

4 to 6 show an example using a pressure reducing valve 50 with stable flow rate control (pressure control). A curve 121 in FIG. 4 shows the pressure of the extinguishing gas agent at the outlet of the collecting pipe 17 when five gas storage containers 5 are opened at different times. A curve 122 shows the pressure of the fire extinguishing gas agent at the injection nozzle 4 when five gas storage containers 5 are opened at different times.

A curve 131 in FIG. 5 shows the pressure of the extinguishing gas agent at the outlet of the collecting pipe 17 when five gas storage containers 5 are opened at different times. A curve 132 shows the pressure of the fire extinguishing gas agent at the injection nozzle 4 when five gas storage containers 5 are opened at different times.

A curve 141 in FIG. 6 shows the pressure of the fire extinguishing gas agent at the outlet of the pressure reducing valve 50 when five gas storage containers 5 are opened at different times.

As shown in FIGS. 4 to 6, in the pressure reducing valve 50 where the flow rate control (pressure control) is stable, the outlet pressure is stable. Since the five gas storage containers 5 are opened at different times, the outlet pressure of the collecting pipe 50 is approximately constant.

4 to 6, the gas storage container 5 is opened every 5 seconds, but the timing of opening the valve is not necessarily limited to 5 seconds. Furthermore, although each gas storage container 5 is opened at equal time intervals, each gas storage container 5 may be opened at unequal time intervals. The valve opening timing can be determined by the control section 15.

That is, the gas-based fire extinguishing equipment includes a plurality of gas storage containers 5 in which extinguishing agent gas is stored, a pipe 3 serving as an introduction means for introducing the extinguishing agent gas in the plurality of gas storage containers 5 into the protection section 1, and a duct 2 for discharging extinguishing agent gas from the protected compartment 1 into which the extinguishing agent gas is introduced, and the opening timing of one container and another of the plurality of gas storage containers 5 is staggered. A fire extinguishing agent gas is introduced into the protected compartment 1.

(Embodiment 2)
As shown in FIG. 7, the second embodiment differs from the first embodiment in that a regulating valve 16 is provided in the piping 3. The regulating valve 16 is provided separately from the pressure reducing valve 50, and has the function of keeping the pressure of the gas extinguishing agent on the outlet side constant. In this embodiment, the pressure reducing valve 50 may not have a function of adjusting pressure. That is, the pressure reducing valve 50 may have only the function of opening and closing the gas storage container 5.

Although only one pipe 3 is shown in FIG. 7, there are three pipes 3 between the collecting pipe 17 and the pressure reducing valve 50. A regulating valve 16 may be provided in each of these three pipes 3.

As shown in FIG. 8, the regulating valve 16 includes a housing 21, an inlet channel 22 provided in the housing 21, an inlet spring 23 provided in the housing 21, and an outlet provided in the housing 21. A movable body 25 biased by a side spring 24, an inlet spring 23 and an outlet spring 24, a cylinder 26 in which the outlet spring 24 is enclosed and in which the movable body 25 can move in the directions shown by arrows 16a and 16b, a fire extinguisher It has an in-casing channel 27 through which the agent gas flows, an outlet-side channel 28 communicating with the in-casing channel 27, and a partition member 29. The movable body 25 includes an inlet side valve 25c adjacent to the opening 29a formed by the partition member 29, an outlet side valve 25a arranged on the outlet side, and a shaft 25b connecting the outlet side valve 25a and the inlet side valve 25c. and has.

As the pressure of the extinguishing agent gas flowing into the regulating valve 16 increases, the flow rate of the extinguishing agent gas also increases. As a result, the movable body 25 moves in the direction shown by the arrow 16a. The inlet side valve 25c is closer to the opening 29a, the pressure loss at the opening 29a increases, and the flow rate of the extinguishing agent gas decreases.

When the pressure of the extinguishing agent gas flowing into the regulating valve 16 decreases, the flow rate of the extinguishing agent gas also decreases. As a result, the movable body 25 moves in the direction shown by the arrow 16b. The inlet side valve 25c moves away from the opening 29a, the pressure loss at the opening 29a becomes smaller, and the flow rate of the extinguishing agent gas increases.

That is, the gas-based fire extinguishing equipment includes a plurality of gas storage containers 5 in which extinguishing agent gas is stored, piping 3 as an introduction means for introducing extinguishing agent gas into protected compartment 1, and protected area into which extinguishing agent gas is introduced. 1, and a regulating valve 16 provided in piping 3 to introduce the extinguishing agent gas into the protected compartment 1 at a constant flow rate. By providing the regulating valve 16 on the downstream side of the pressure reducing valve 50, even if the pressure fluctuates on the outlet side of the pressure reducing valve 50, the regulating valve 16 can smooth out this pressure variation. Therefore, even if a plurality of gas storage containers 5 are opened at once, the peak pressure is smoothed by the adjustment valve 16.

The embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that all changes within the meaning and range equivalent to the claims are included.

This invention can be utilized in the field of gas fire extinguishing equipment.

1 protected compartment, 1a pressure relief port, 2 duct, 3 piping, 4 injection nozzle, 5 gas storage container, 12 damper, 13 outlet, 15 control section, 16 regulating valve, 17 collecting pipe, 50 pressure reducing valve.

Claims (2)

a plurality of containers containing extinguishing agent gas;
introduction means for introducing the extinguishing agent gas in the plurality of containers into the protected compartment;
and a duct for discharging the extinguishing agent gas from the protected compartment into which the extinguishing agent gas is introduced,
Gas-based fire extinguishing equipment, in which extinguishing agent gas is introduced into the protected compartment by staggering the opening timings of one container and another of the plurality of containers. a plurality of containers containing extinguishing agent gas;
introduction means for introducing the extinguishing agent gas in the plurality of containers into the protected compartment;
a duct for discharging the extinguishing agent gas from the protected compartment into which it is introduced;
Gas-based fire extinguishing equipment, comprising: a regulating valve provided in the introducing means to introduce extinguishing agent gas into the protected compartment at a constant flow rate.

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