JP2016202734A - Gaseous system fire fighting equipment - Google Patents

Abstract

To provide a gas fire extinguishing equipment capable of reducing construction cost and improving design flexibility. A gas fire extinguishing system includes a plurality of gas storage containers 5 in which extinguishing agent gas is stored, and introduction means for introducing the extinguishing agent gas in the plurality of gas storage containers 5 into a protective section 1. A pipe 3 and a duct 2 for discharging the extinguishing agent gas from the protective section 1 into which the extinguishing agent gas is introduced, and one container among the plurality of gas storage containers 5 and another container The extinguishing agent gas is introduced into the protection section 1 at different valve opening times. [Selection] Figure 1

Description

  The present invention relates to a gas fire extinguishing facility.

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

JP 2014-108185 A

  Conventional gas fire extinguishing equipment has a problem of high construction cost and low design freedom. Then, this invention was made | formed in order to solve said problem, and it aims at providing the gas fire extinguishing equipment which can reduce construction cost and has a high design freedom. Is.

  A gas fire extinguishing facility according to one aspect of the present invention includes a plurality of containers in which extinguishing agent gas is stored, introduction means for introducing the extinguishing agent gas in the plurality of containers into a protective compartment, A duct for discharging fire extinguishing agent gas from the protective compartment to be introduced, and introducing the fire extinguishing gas into the protective compartment by shifting the valve opening timing of one of the plurality of containers and another container Is done.

  A gas fire extinguishing facility according to another aspect of the present invention includes a plurality of containers storing extinguishing agent gas, introduction means for introducing the extinguishing agent gas in the plurality of containers into a protective compartment, A duct for discharging the extinguishing agent gas from the protective compartment to be introduced; and a regulating valve provided in the introduction means for introducing the extinguishing agent gas into the protective compartment at a constant flow rate.

It is a schematic diagram of the gas fire extinguishing equipment according to Embodiment 1. It is sectional drawing along the II-II line | wire in FIG. It is a graph which shows the pressure change at the time of nitrogen fire extinguishing. It is a graph which shows the pressure change at the time of nitrogen fire extinguishing when adjustment pressure is about 7 MPa. It is a graph which shows the pressure change at the time of nitrogen fire extinguishing when adjustment pressure is about 5 MPa. It is a graph which shows the pressure change at the time of nitrogen fire extinguishing when adjustment pressure is about 3-4 Mpa. It is a schematic diagram of the gas fire extinguishing equipment according to Embodiment 2. It is a schematic diagram of the 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 denoted by the same reference numerals, and description thereof will not be repeated. Moreover, it is also possible to combine each embodiment.

(Embodiment 1)
The present inventor analyzed the conventional problem, that is, the problem that the construction cost is high and the degree of freedom of design is low in the gas fire extinguishing equipment. As a result, regarding the cost of the gas fire extinguishing equipment and the degree of freedom of design, the cost of piping for introducing the fire extinguishing agent gas and the duct for discharging the fire extinguishing agent gas are high, and the degree of freedom of design is narrowing I found a problem.

  Conventional ducts extend from a protected area where extinguishing gas is introduced to the outside of the building having the protected area. If the duct is thinner than before, the construction cost associated with the duct can be reduced. The construction cost can also be reduced by reducing the piping.

  Furthermore, since the duct extends in the vertical and / or horizontal direction in the building, the structure of the building is also affected. If the duct is thinner than the conventional one, the duct can be piped in a narrow place where the duct could not be piped conventionally, and the degree of freedom of design is increased. The thinner the pipes, the greater the degree of design freedom.

  Referring to FIGS. 1 to 3, the gas fire extinguishing equipment includes a pipe 3 for sending a fire extinguishing agent gas into the protection section 1 and a duct 2 connected to the protection section 1 for discharging the fire extinguishing agent gas.

  The protective section 1 is a room provided in a building such as a building. In rooms equipped with electronic equipment, water cannot be used for extinguishing fire, and fire extinguishing gas is used to extinguish the fire. It is possible to extinguish the fire by discharging the fire extinguishing gas agent from the injection nozzle 4 to the protective section 1 and filling the inert fire extinguishing gas into the protective section 1 to reduce the oxygen concentration. As the extinguishing agent gas, an inert gas such as nitrogen or argon and a halogen-based gas are used.

  The duct 2 is a gas path for releasing the extinguishing agent gas in the protective section 1 from the protective section 1. The duct 2 is hollow and may be either square or round. A damper 12 is provided at the end of the duct 2 at the pressure relief port 1a of the protection section 1, and the duct 2 and the protection section 1 are communicated and blocked by opening and closing the damper 12. The damper 12 can rotate from the position indicated by the solid line to the position indicated by the dotted line. In this embodiment, only one duct 2 is provided in the protective compartment 1, but a plurality of ducts 2 may be provided.

The duct 2 extends from the inlet (pressure avoidance port 1a) to the outlet 13.
The pipe 3 is a path for sending the extinguishing agent gas from the gas storage container 5 arranged outside the protective section 1 to the protective section 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 to the protective section 1 through the pipe 3 and the injection nozzle 4.

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

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

  Curves 111 to 115 indicate the pressure of the extinguishing gas agent at the outlet of the pressure reducing valve 50 as the container valve when the first to fifth gas storage containers 5 are opened. A curve 104 indicates the pressure of the extinguishing agent gas at the outlet of the pressure reducing valve 50 constituted by the sum of the extinguishing agent pressures indicated by the curves 111 to 115.

  A point 105 indicates the maximum pressure in the curve 102, and the size of the pressure relief port 1a is determined in consideration of this maximum pressure. That is, if the maximum pressure indicated by the point 105 is large, it is necessary to increase the diameter of the pressure relief port and the diameter of the duct 2, which increases the construction cost. If the five gas storage containers 5 are opened simultaneously, the peak pressures of the extinguishing agent gases released from the respective gas storage containers 5 overlap. As a result, the maximum pressure is increased, and the diameters of the pressure avoidance port 1a and the duct 2 are increased. On the other hand, by shifting the valve opening timing of the five gas storage containers 5, it is possible to prevent the peak pressures of the extinguishing agent gas released from the gas storage containers 5 indicated by the 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 reduce the size of the pressure avoidance port 1a and the duct 2. Furthermore, the piping 3 can also be made thin.

  FIG. 3 shows the pressure reducing valve 50 in which the 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 indicated by the curve 102 is not stable.

  4 to 6 show examples using the pressure reducing valve 50 in which the flow rate control (pressure control) is stable. A curve 121 in FIG. 4 shows the pressure of the extinguishing gas agent at the outlet of the collecting pipe 17 when the five gas storage containers 5 are opened at different times. A curve 122 shows the pressure of the extinguishing gas agent at the injection nozzle 4 when the 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 the five gas storage containers 5 are opened at different times. A curve 132 shows the pressure of the extinguishing gas agent at the injection nozzle 4 when the five gas storage containers 5 are opened at different times.

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

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

  4 to 6, the gas storage container 5 is opened every 5 seconds, but the opening timing is not necessarily limited to 5 seconds. Further, each gas storage container 5 is opened at an equal time interval, but each gas storage container 5 may be opened at an uneven time interval. The valve opening timing can be determined by the control unit 15.

  That is, the gas fire extinguishing equipment includes a plurality of gas storage containers 5 in which the extinguishing agent gas is stored, and pipes 3 as introduction means for introducing the extinguishing agent gas in the plurality of gas storage containers 5 into the protective section 1; A duct 2 for discharging the extinguishing agent gas from the protective section 1 into which the extinguishing agent gas is introduced, and shifting the valve opening timing between one of the plurality of gas storage containers 5 and another container A fire extinguishing gas is introduced into the protective compartment 1.

(Embodiment 2)
As shown in FIG. 7, the second embodiment is different from the first embodiment in that an adjustment valve 16 is provided in the pipe 3. The regulating valve 16 is provided separately from the pressure reducing valve 50 and has a function of making 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 the pressure. That is, the pressure reducing valve 50 may have only a function of opening and closing the gas storage container 5.

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

  As shown in FIG. 8, the regulating valve 16 includes a casing 21, an inlet channel 22 provided in the casing 21, an inlet side spring 23 provided in the casing 21, and an outlet provided in the casing 21. Side spring 24, movable body 25 biased by inlet side spring 23 and outlet side spring 24, cylinder 26 in which outlet side spring 24 is enclosed and movable body 25 is movable in the directions indicated by arrows 16a and 16b, fire extinguishing It has the flow path 27 in the housing | casing through which agent gas flows, the exit side flow path 28 connected with the flow path 27 in the housing | casing, and the 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 disposed on the outlet side, and a shaft 25b connecting the outlet side valve 25a and the inlet side valve 25c. And have.

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

  That is, the gas 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 the extinguishing agent gas into the protective compartment 1, and a protective compartment in which the extinguishing agent gas is introduced. 1 is provided with a duct 2 for discharging the extinguishing agent gas from 1, and a regulating valve 16 provided in the pipe 3 for introducing the extinguishing agent gas into the protective section 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 fluctuation of the pressure can be smoothed by the regulating valve 16. Therefore, even if the plurality of gas storage containers 5 are opened at once, the peak pressure is smoothed by the regulating valve 16.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

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

  DESCRIPTION OF SYMBOLS 1 Protective zone, 1a Pressure relief port, 2 Duct, 3 Piping, 4 Injection nozzle, 5 Gas storage container, 12 Damper, 13 Outlet, 15 Control part, 16 Control valve, 17 Collecting pipe, 50 Pressure reducing valve.

Claims (2)

A plurality of containers containing extinguishing agent gas;
Introducing means for introducing extinguishing gas in the plurality of containers into the protective compartment;
A duct for discharging the extinguishing agent gas from the protective compartment into which the extinguishing agent gas is introduced,
A gas fire extinguishing facility in which a fire extinguishing agent gas is introduced into the protective compartment while shifting the valve opening timing of one of the plurality of containers and another container. A plurality of containers containing extinguishing agent gas;
Introducing means for introducing extinguishing gas in the plurality of containers into the protective compartment;
A duct for discharging the extinguishing agent gas from the protective compartment into which the extinguishing agent gas is introduced;
A gas-based fire extinguishing equipment provided with an adjustment valve provided in the introduction means and introducing a fire extinguisher gas into the protection section at a constant flow rate.

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