JP6400365B2 - Gas fire extinguishing equipment - Google Patents

Description

  The present invention relates to a gas fire extinguishing equipment that extinguishes fire by reducing an oxygen concentration in a fire extinguishing target section by releasing an inert gas such as nitrogen gas into the fire extinguishing target section of a building as a fire extinguishing agent when a fire occurs.

  A gas fire extinguishing facility using a compressed inert gas as a fire extinguisher can be configured simply because it does not require a pressurized gas supply facility. Because the extinguishing agent is a compressed gas, it can be ejected vigorously into the fire extinguishing target area and can be easily diffused throughout the space within the fire extinguishing target area, and there is no risk of fouling compared to the case of using water or chemicals, There is an advantage that it can also be used for electrical equipment that is energized. Examples of the inert gas used as the extinguishing agent include carbon dioxide gas, nitrogen gas, a mixture of argon gas and nitrogen gas, and a mixture of argon gas, nitrogen gas and carbon dioxide gas.

  FIG. 5 shows an example of a conventional gas fire extinguishing equipment 100. This gas fire extinguishing equipment 100 is compressed as a fire extinguisher storage container 101 filled with an inert gas in a compressed state as a gas fire extinguisher, a container valve 101a attached thereto, and a starting gas for opening the container valve 101a. The start-up gas storage container 102 filled with the carbon dioxide gas and the like, the start-up valve 102a attached to the start-up gas storage container 102, and the start-up gas in the start-up gas storage container 102 are used as the extinguishing agent storage container 101. A start-up gas transport pipe 103 that leads to the container valve 101a and a fire extinguisher transport pipe that is connected to the container valve 101a of the fire extinguisher storage container 101 and guides the gas fire extinguisher in the fire extinguisher storage container 101 to the room R1 that is the fire extinguishing target section. 105, an on-off valve 104 provided in the fire extinguisher transport pipe 105, and an ejection head 1 connected to the fire extinguisher transport pipe 105 and ejecting the gas fire extinguishing agent into the room R1. Configured to include a 6.

  The gas fire extinguishing equipment 100 having such a configuration is described in, for example, Patent Document 1 (see FIG. 5).

  In the gas fire extinguishing equipment 100, when the occurrence of a fire is detected by a fire detector (not shown) installed in the room R1, a control device (not shown) opens the start valve 102a and the on-off valve 104. The starting gas in the starting gas storage container 102 is supplied to the container valve 101a of the fire extinguisher storage container 101 through the starting gas transport pipe 103 to open the container valve 101a.

  When the container valve 101a is opened, the gas fire extinguisher in the fire extinguisher storage container 101 is supplied to the room R1 of the fire extinguishing target section through the fire extinguisher transport pipe 105, and is ejected from the ejection head 106 to be in the room R1. Reduces oxygen concentration and exerts a fire-extinguishing effect.

Since the extinguishing agent storage container 101 is filled with the gas extinguishing agent at a high pressure, the gas extinguishing agent is jetted out into the room R1 vigorously. In Patent Document 1, the pressure of nitrogen gas filled in the extinguishing agent storage container 100 as a gas extinguishing agent is about 150 kgf / cm ² G (about 14.7 MPa) at 40 ° C., and the starting gas storage container 102 is used. The pressure of carbon dioxide gas charged as starting gas is about 110 kgf / cm ² G (about 10.8 MPa) at 40 ° C.

JP 2003-240152 A

  When the gas fire extinguishing equipment 100 is installed, it is prescribed by the Fire Service Act enforcement regulations that an amount of gas extinguishing agent determined based on the volume of the room needs to be ejected within a predetermined time. The conventional gas fire extinguishing equipment 100 prevents a reduction in the flow rate of the fire extinguishing agent when the gas extinguishing agent is ejected from the extinguishing agent storage container 101 by increasing the number of installed extinguishing agent storage containers 101 within a predetermined time. It is designed to ensure that the required amount of gas extinguishing agent is jetted into the room R1 of the fire extinguishing target section. Therefore, when the volume of the room R1 of the fire extinguishing target section is reduced by the introduction of an article or the like, if a large amount of gas extinguishing agent flows into the room in a short time, the atmospheric pressure of the room rapidly increases, and the room R1 There is a possibility of adversely affecting the structure to be constructed and the equipment installed in the room R1.

  For example, as shown in FIG. 5, when a gas fire extinguishing equipment 100 is installed in a room R1, and a room R2 partitioned by a less rigid wall member 110 such as a wall panel or partition is built in the room R1, When the extinguishing agent is ejected, the air pressure in the room R1 rises, and there is a possibility that the wall member 110 in the room R2 is adversely affected by the differential pressure generated between the room R2 and the room R2. In addition, since the effective volume in the room R1 is reduced by the volume of the room R2 compared to before the room R2 is constructed, the room R1 is partitioned by increasing the degree of increase in pressure when the gas extinguishing agent is ejected. There is a possibility of adversely affecting the wall member 120 and the ceiling member. When furniture 130 such as a cabinet with a high degree of sealing is installed in the room R1, there is a possibility that the door of the furniture 130 may be adversely affected by an increase in air pressure in the room R1. Furthermore, since the jet speed of the gas extinguishing agent ejected from the ejection head 106 is high, there is a problem that a relatively light article in the room R1 may be scattered by the gas extinguishing agent gas stream.

  An object of the present invention is to provide a gas fire extinguishing facility that solves the above-described conventional problems and suppresses an excessive increase in atmospheric pressure due to the ejection of a gas fire extinguishing agent, thereby preventing damage and scattering of equipment.

The present invention relates to a container main body in which a pressurized gas extinguisher is stored, and a container valve that is attached to an opening of the container main body and controls the opening to an open state or a closed state, and is supplied from the outside. A fire extinguisher storage container comprising a container valve that operates by gas pressure to open the opening,
A starting gas storage container in which a starting gas for opening the container valve is stored;
An activation gas transport pipe that forms an activation gas flow path for guiding the activation gas in the activation gas storage container from the activation gas storage container to the container valve;
A fire-extinguishing agent transport pipe that forms a fire-extinguishing agent flow path that guides the pressurized gas fire-extinguishing agent in the fire-extinguishing agent storage container from the fire-extinguishing agent storage container to a fire extinguishing target section partitioned by a wall in a building;
An ejection head connected to the extinguishing agent transport pipe and having an ejection outlet for ejecting the gas extinguishing agent to the fire extinguishing target section ;
A gas fire extinguishing equipment that takes a first time until the predetermined amount of the gas fire extinguisher stored in the fire extinguisher storage container is ejected from the ejection head to complete ejection,
The fire extinguishing agent transport pipe is a gas jetting time adjusting means, wherein the flow passage cross-sectional area of the gas jetting time adjusting means is made smaller than the flow passage cross-sectional area of the fire extinguishing agent transport pipe until the ejection is completed. and a gas jetting time adjusting means for increasing the time required for viewing including,
In the gas fire extinguishing equipment, the gas ejection time adjusting means is capable of adjusting the time until the ejection is completed from the first time to a second time longer than the first time. is there.

  Further, the invention is characterized in that the ejection time adjusting means is a variable orifice interposed in the middle of the extinguishing agent transport pipe.

  Furthermore, the present invention is characterized in that the ejection time adjusting means is a flow rate control valve connected as a container valve to the fire extinguishing agent storage container.

In the gas fire extinguishing equipment according to the present invention, when the starting gas is supplied from the starting gas storage container to the container valve of the fire extinguisher storage container via the starting gas transport pipe, the container valve is opened to store the fire extinguishing agent. The gas fire extinguisher in the container is sent to the fire extinguisher transport pipe, and the gas fire extinguisher sent to the fire extinguisher transport pipe is guided to the fire extinguishing target section and ejected from the ejection head. The gas ejection time adjusting means adjusts the time until the ejection is completed from the first time to a second time longer than the first time . It is possible to prevent a sudden increase in atmospheric pressure and prevent adverse effects on room structures and equipment. In addition, by increasing the jetting time of the gas extinguishing agent, the flow rate of the gas extinguishing agent can be reduced and the articles in the room can be prevented from being scattered by the gas extinguishing agent gas stream.

  Further, according to the present invention, since the ejection time adjusting means is a variable orifice interposed in the middle of the extinguishing agent transport pipe, by operating the variable orifice, the flow passage cross-sectional area of the extinguishing agent transport pipe is changed. The gas fire extinguishing agent ejection time can be adjusted. When it is desired to lengthen the gas fire extinguishing agent ejection time and alleviate the increase in the atmospheric pressure of the room, the flow passage cross-sectional area of the extinguishing agent transport pipe may be reduced by the variable orifice.

  Further, according to the present invention, since the ejection time adjusting means is a flow rate control valve connected as a container valve to the fire extinguisher storage container, the flow rate control valve is operated to cause the gas fire extinguisher in the fire extinguisher storage container to be sent out. The ejection time of the gas extinguishing agent can be adjusted by changing the cross-sectional area of the delivery channel. When it is desired to lengthen the gas fire extinguishing agent ejection time and alleviate the increase in the atmospheric pressure in the room, the flow control valve may be used to reduce the cross-sectional area of the delivery channel of the extinguishing agent storage container.

It is sectional drawing which shows roughly the whole structure of the gas fire extinguishing equipment 1 which concerns on one Embodiment of this invention. FIG. 2A shows an example of a variable orifice interposed in the middle of the extinguishing agent transport pipe 3, FIG. 2A is a sectional view showing a perforated plate type variable orifice 40, and FIG. 2B is a needle type variable orifice. FIG. 2C is a cross-sectional view showing the orifice 42. 3 is a cross-sectional view showing an example of a nozzle 50 of the ejection head 4. FIG. 3 is a cross-sectional view showing an example of a nozzle 51 of the ejection head 4. FIG. It is a figure which shows the structure of the conventional gas fire extinguishing equipment 100 roughly.

  FIG. 1 is a cross-sectional view schematically showing an overall configuration of a gas fire extinguishing facility 1 according to an embodiment of the present invention. The gas fire extinguishing equipment 1 according to the present embodiment is installed in a building A which is a concrete building having a multi-story structure, for example, and is divided into a plurality of (3 in the present embodiment) fire extinguishing target sections partitioned by walls W, floors F and ceilings C. The gas extinguishing agent can be ejected individually to the rooms D1, D2, and D3 according to the occurrence of a fire. The illustrated rooms D1 to D3 schematically show one of a plurality of rooms on each level of the building A.

  In this embodiment and other embodiments described later, “downstream side” refers to the flow direction of the extinguishing agent from the extinguishing agent storage container 2 to the ejection heads 4 through the extinguishing agent transport pipe 3. "Refers to the opposite direction to" downstream ".

  The gas fire extinguishing equipment 1 is a plurality of fire extinguishing agent storage containers 2 in which gas extinguishing agents are stored (6 in the present embodiment), fire extinguishing agent transport pipes 3, and a plurality of jets installed in each of the rooms D1, D2, and D3. The head 4, the starter gas storage container 5, the starter gas transport pipe 6, a plurality of (3 in this embodiment) starter devices 7, and the fire extinguisher transport pipe 3 are provided in the fire extinguishing agent transport pipe 3. It includes fire extinguishing agent passage opening / closing valves 8a, 8b, 8c for opening and closing the agent passage.

  The extinguishing agent transport pipe 3 has a main pipe 30 and branch pipes 31, 32, 33 branched from the main pipe 30, and each branch pipe 31, 32, 33 has a fire extinguisher at a connection portion with the main pipe 30. Agent flow opening / closing valves 8a, 8b, and 8c are provided, and the ejection head 4 is connected to the downstream side.

  The starting device 7 includes a starting gas storage container 5, and the starting gas storage container 5 is supplied to the container valve 22 of the extinguishing agent storage container 2 to start the container valve 22. Is stored.

  The activation gas transport pipe 6 forms an activation gas flow path that guides the activation gas in the activation gas storage container 5 from the activation gas storage container 5 to the container valve 22 of the extinguishing agent storage container 2. Moreover, the fire extinguisher transport pipe 3 forms a fire extinguisher flow path that guides the gas fire extinguisher stored in a compressed state in the fire extinguisher storage container 2 from the fire extinguisher storage container 2 to the ejection heads 4 in the rooms D1 to D3. To do.

  The fire extinguishing agent storage container 2 includes a container body 21 and a container valve 22. The container body 21 is composed of a pressure container. An opening is formed at the top of the container body 21, and the container valve 22 is detachably connected to the opening. The container valve 22 hermetically closes the opening of the opening of the container body 21 to form a sealed storage space in the container body 21. This storage space is filled with a gas extinguisher in a compressed state and stored. The container valve 22 operates when the activation gas is supplied from the activation gas storage container 5 of the activation device 7 to open the opening.

  Each container body 21 is filled with a gas extinguishing agent in a compressed state at a predetermined pressure in an internal storage space, and is accommodated in, for example, a cylinder chamber 19. The storage amount of the gas extinguishing agent in the extinguishing agent storage container 2 accommodated in the cylinder chamber 19 is an amount necessary to extinguish a fire generated in the rooms D1 to D3. In the present embodiment, a sufficient amount of gas extinguishing agent is secured by installing six extinguishing agent storage containers 2.

  A container body 21 having pressure resistance that can withstand the pressure of the gas extinguisher filled inside is used for the extinguishing agent storage container 2. In the present embodiment, the pressure of the gas extinguishing agent filled in the extinguishing agent storage container 2 is, for example, about 30 MPa. Therefore, a pressure vessel having an allowable pressure of 30 MPa or more is used as the vessel body 21.

  The gas fire extinguisher filled in the fire extinguisher storage container 2 is not particularly limited as long as it is an inert gas having a fire extinguishing action. For example, nitrogen, carbon dioxide, a mixture of rare gas and nitrogen, rare gas, nitrogen and nitrogen dioxide. A mixture with carbon or the like can be used. Among these, it is preferable to use nitrogen gas that does not liquefy even at high pressure, or a mixed gas of rare gas and nitrogen gas. For example, nitrogen gas or carbon dioxide gas can be used as the starting gas.

  The extinguishing agent flow path opening / closing valves 8a, 8b, 8c are realized by, for example, electromagnetic opening / closing valves, and are opened / closed by an opening / closing command signal of the control device 13 output in response to an input signal from a fire detector or a manual activation device. Is controlled. The control device 13 is realized by a computer in this embodiment, but may be realized by a sequence control device. Furthermore, you may comprise so that the fire extinguishing agent flow-path opening-and-closing valve 8a, 8b, 8c may be open | released with the gas pressure from the starting device 7. FIG.

  When an activation signal from a fire detector (not shown) or a manual activation device (not shown) installed on the walls and ceilings of the rooms D1 to D3 of the building A is input, the control device 13 is activated in response to the activation signal. The apparatus 7 is operated, and the starting gas is supplied from the starting gas storage container 5 to the container valve 22 of each extinguishing agent storage container 2 through the starting gas transport pipe 6. When the container valve 22 is opened by the gas pressure of the starting gas, the opening of the extinguishing agent storage container 2 is opened, and the gas extinguishing agent is sent to the extinguishing agent transport pipe 3. At the same time as the operation of the activation device 7, the control device 13 opens any one of the extinguishing agent flow path opening / closing valves 8a, 8b, and 8c corresponding to the rooms D1 to D3 in which the fire is detected. The gas extinguishing agent reaches one of the target rooms D1, D2, and D3 through one of the branch pipes 31, 32, and 33 determined by the opening / closing operation of the extinguishing agent passage opening / closing valves 8a, 8b, and 8c. , Ejected from the ejection head. The gas fire extinguisher is ejected vigorously by the expansion pressure, fills any one or a plurality of spaces in the rooms D1 to D3, and puts the room space into a low oxygen state to extinguish and extinguish the fire.

  The gas fire extinguishing equipment 1 is required to be able to eject a predetermined amount V of gas extinguishing agent determined according to the volumes of the rooms D1 to D3 to the rooms D1 to D3 within a predetermined time T. Therefore, in order to ensure that the ejection of the predetermined amount V of the gas extinguishing agent can be completed within the predetermined time T, the ejection of the predetermined amount V of the gas extinguishing agent can be completed in, for example, half the predetermined time T. May be. In such a case, since a large amount of gas fire extinguishing agent flows into the room in a short time, the pressure increase in the rooms D1 to D3 is abrupt, which may adversely affect the structure and equipment of the room.

  In the present embodiment, gas ejection time adjusting means 10 for changing the time until the predetermined amount V of the gas extinguishing agent ejected from the ejection head 4 is completely ejected according to the structure and environment of the room is provided, and the room D1 Mitigates ~ D3 pressure rise.

  The gas ejection time adjusting means 10 is provided in the fire extinguishing agent flow path from the extinguishing agent storage container 2 to the ejection head 4 through the extinguishing agent transport pipe 3. Although there is no restriction | limiting about the position on the extinguishing agent flow path which provides the gas ejection time adjustment means 10, It is desirable to set it as the position where adjustment work is easy as needed. For example, the inside of the cylinder chamber 19 in which the extinguishing agent storage container 2 is accommodated or in the vicinity thereof, or in the vicinity of the ejection head 4 so that adjustment work can be performed from each of the rooms D1 to D3 can be considered.

  FIG. 2 shows an example in which a variable orifice is interposed in the middle of the extinguishing agent transport pipe 3 as the gas ejection time adjusting means 10, and FIG. 2A is a sectional view showing a perforated plate type variable orifice 40. 2B is a cross-sectional view showing the needle type variable orifice 41, and FIG. 2C is a cross-sectional view showing the orifice 42.

  The variable orifice 40 shown in FIG. 2 (A) uses two porous plates 40a and 40b. One porous plate 40a is fixed to the extinguishing agent transport pipe 3, and the other porous plate 40b is fixed. The porous plate 40a can be slid in close contact with the surface of the porous plate 40a.

  With this configuration, by sliding the movable porous plate 40b, the overlapping state of the through holes 40c formed in each of the two porous plates 40a and 40b can be adjusted, and the flow path cross-sectional area can be changed. By reducing the cross-sectional area of the flow path, it is possible to lengthen the time required to complete the ejection of the predetermined amount V of the gas extinguishing agent, and to suppress an increase in atmospheric pressure when the gas extinguishing agent is ejected.

  A variable orifice 41 shown in FIG. 2B has a conical tip, a needle 41a that can advance and retreat along the axis of the extinguishing agent transport pipe 3, and a seating surface that can be in close contact with the conical surface at the tip of the needle 41a. It is comprised with the seating part 41b which has. A flow path is formed at the center of the seat 41b. The flow passage cross-sectional area can be changed by moving the needle 41a forward and backward to adjust the separation distance L from the seating portion 41b. By bringing the needle 41a closer to the seating part 41b, the cross-sectional area of the flow path is reduced, the time required to complete the ejection of the predetermined amount V of the gas extinguishing agent is lengthened, and the pressure increase during the ejection of the gas extinguishing agent is increased. Can be suppressed.

  FIG. 2C shows an example in which an orifice 42 whose flow path cross-sectional area S is smaller than the flow path cross-sectional area of the fire extinguisher transport pipe 3 is interposed in the middle of the fire extinguisher transport pipe 3. In this example, a plurality of orifices having different channel cross-sectional areas S are prepared, and an orifice 42 having an optimal channel cross-sectional area S may be selected in accordance with the time required to complete ejection of a predetermined amount V of gas extinguishing agent. .

  The gas ejection time adjusting means 10 can also be realized by changing the nozzles constituting the ejection head 4. FIG. 3 is a cross-sectional view showing an example of the nozzle 50 of the ejection head 4, and FIG. 4 is a cross-sectional view showing another example of the nozzle 51.

  As shown in FIG. 3, the ejection head 4 connected to the extinguishing agent transport pipe 3 includes a nozzle 50 attached to the ejection port portion 3 a of the extinguishing agent transport pipe 3. In the present embodiment, the cross-sectional area of the flow path is reduced by forming the tip of the nozzle 50 into a shape having a large number of apertures 50a.

  In the embodiment of FIG. 4, the diameter of the opening 51 a of the nozzle 51 attached to the jet port 3 a of the fire extinguishing agent transport pipe 3 is made smaller than the diameter of the jet port 3 a of the fire extinguisher transport pipe 3. The channel cross-sectional area is reduced.

  The gas ejection time adjusting means 10 can also be realized by making the container valve 22 connected to the extinguishing agent storage container 2 a flow control valve.

  The gas ejection time adjusting means 10 may prevent the predetermined time T from being exceeded when the time required to complete ejection of the predetermined amount V of the gas fire extinguishing agent from the fire extinguishing agent storage container 2 is lengthened. desirable. For example, when the gas fire extinguishing equipment 1 is initially designed to be able to complete ejection of a predetermined amount V of gas extinguishing agent in a half of a predetermined time T that is determined in advance, the gas extinguishing time of the gas extinguishing agent is predetermined. What is necessary is just to extend to time T.

DESCRIPTION OF SYMBOLS 1 Gas fire extinguishing equipment 2 Fire extinguisher storage container 3 Fire extinguisher transport pipe 4 Jetting head 5 Gas storage container for start-up 6 Gas transport pipe for start-up 7 Start-up device 8a, 8b, 8c Fire extinguisher channel opening / closing valve 13 Control device 21 Container body 22 Container valve 30 Main pipe 31, 32, 33 Branch pipe A Building D1, D2, D3 Fire extinguishing section

Claims (3)

A container main body in which a pressurized gas extinguisher is stored, and a container valve that is attached to the opening of the container main body and controls the opening to be in an open state or a closed state. A fire extinguishing agent storage container comprising a container valve that operates to open the opening.
A starting gas storage container in which a starting gas for opening the container valve is stored;
An activation gas transport pipe that forms an activation gas flow path for guiding the activation gas in the activation gas storage container from the activation gas storage container to the container valve;
A fire-extinguishing agent transport pipe that forms a fire-extinguishing agent flow path that guides the pressurized gas fire-extinguishing agent in the fire-extinguishing agent storage container from the fire-extinguishing agent storage container to a fire extinguishing target section partitioned by a wall in a building;
An ejection head connected to the extinguishing agent transport pipe and having an ejection outlet for ejecting the gas extinguishing agent to the fire extinguishing target section ;
A gas fire extinguishing equipment that takes a first time until the predetermined amount of the gas fire extinguisher stored in the fire extinguisher storage container is ejected from the ejection head to complete ejection,
The fire extinguishing agent transport pipe is a gas jetting time adjusting means, wherein the flow passage cross-sectional area of the gas jetting time adjusting means is made smaller than the flow passage cross-sectional area of the fire extinguishing agent transport pipe until the ejection is completed. and a gas jetting time adjusting means for increasing the time required for viewing including,
The gas fire extinguishing equipment, wherein the gas ejection time adjusting means is capable of adjusting a time until the ejection is completed from the first time to a second time longer than the first time .   The gas fire extinguishing equipment according to claim 1, wherein the gas ejection time adjusting means is a variable orifice interposed in the middle of the fire extinguisher transport pipe.   The gas fire extinguishing equipment according to claim 1, wherein the gas ejection time adjusting means is a flow control valve connected as a container valve to the fire extinguishing agent storage container.

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