JP6196955B2 - Fire extinguishing gas jetting apparatus and gas fire extinguishing apparatus provided with the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fire extinguishing gas jetting apparatus that extinguishes fire by releasing a fire extinguishing gas such as N ₂ gas or halide gas as a fire extinguishing agent into a space in a fire extinguishing target section of a building, and a gas fire extinguishing apparatus including the same. More particularly, the present invention relates to a fire extinguishing gas jetting apparatus that can be suitably implemented to reduce the loud sound generated when fire extinguishing gas is jetted from a jet head provided in a fire extinguishing target section, and a gas fire extinguishing apparatus including the same. .

Conventionally, various buildings are equipped with gas fire extinguishing devices that discharge fire extinguishing gases such as CO ₂ gas, N ₂ gas, and halide gas as extinguishing agents into spaces within the fire extinguishing target section.

  FIG. 31 is a perspective view showing a part of the configuration including the ejection head 3 of the conventional gas fire extinguishing apparatus. The high-pressure fire extinguishing gas supplied from the fire extinguishing gas supply source 2 at the time of the occurrence of a fire is led to the conduit 4 and ejected from the ejection head 3 connected to the conduit 4.

  The conduit 4 is connected to the main pipe 5 connected to the fire extinguishing gas supply source 2, the branch pipe 6 interposed in the main pipe 5, and the fire extinguishing gas from the main pipe 5 is guided by the branch pipe 6, and the jet head 3 is connected. And a branch pipe 7. The main pipe 5 is fastened to a base of the building or a base 8 and a bracket 9 fixed to the case by a fastener 10 such as a U bolt, and is installed in a state where vibration and displacement of the jet head 3 are suppressed ( For example, see Patent Document 1).

  In the prior art, a large amount of the high-pressure fire extinguishing gas supplied from the fire extinguishing gas supply source 2 through the conduit 4 is ejected from the ejection head 3, and thus the high pressure from the nozzle hole 716 formed in the nozzle portion 712 of the ejection head 3. The fire extinguishing gas flow injected at a speed causes a problem of generating a large sound that cuts air.

  In another conventional technique for solving this problem (for example, refer to Patent Document 2), a sound deadening means composed of a sound deadening material made of a porous material is provided at the outlet of an orifice for injecting a fire extinguishing gas. Is composed of a single-piece structure that extends in the axial direction of the orifice and is formed to be thick, or is composed of two overlapping divided structures that extend in the axial direction of the orifice and are each formed thick.

  The new problem of this prior art is that the characteristics of various injections and silences can be accurately determined in response to the flow rate, pressure, and the level of silence required for the fire extinguishing gas injected into the space within the fire extinguishing target section. It is difficult to adjust and obtain.

JP-A-8-173565 Japanese Patent No. 5276728

  An object of the present invention is to provide a fire extinguishing gas injection apparatus that can attenuate sound caused by the jet flow of the fire extinguishing gas from the jet head and that can be easily obtained by accurately adjusting various injection and noise reduction characteristics. It is providing the gas fire extinguishing apparatus provided with it.

  A fire extinguishing gas jetting apparatus that jets a high-pressure fire extinguishing gas toward a space in a fire extinguishing target section in a building, wherein the fire extinguishing gas jetting apparatus emits sound due to ejection of the fire extinguishing gas from the jetting head. And a silencer that attenuates the silencer. The silencer includes a first silencer provided on the ejection head side and a second silencer provided on the downstream side of the first silencer. Each of the first and second silencing members is formed in a flat plate shape and is made of a porous material through which gas can flow.

  In the fire-extinguishing gas injection device configured as described above, it is possible to appropriately change the characteristics of injection and noise reduction by changing the number of stacked layers as compared with the case where the sound-absorbing material is configured by a cylindrical block.

  Preferably, the first and second silencing members are stacked to form a columnar or cylindrical shape.

Preferably, the first and second silencing members have the same outer diameter.
Preferably, the first and second silencing members have the same thickness.

Preferably, the entire outer peripheral surfaces of the first and second silencing members are exposed to the atmosphere.
Preferably, an annular or plate-like pressing member for fixing the second silencing member is further provided.

  Preferably, the silencer includes a first silencer located upstream and a second silencer located downstream, and a gas is interposed between the first silencer and the second silencer. An intermediate member that can circulate is disposed.

  The gas fire extinguishing apparatus includes any one of the above-described fire extinguishing gas injection apparatuses, a conduit for introducing a high pressure fire extinguishing gas to the fire extinguishing gas injection apparatus, and a fire extinguishing gas supply source that supplies the high pressure fire extinguishing gas to the conduit. .

1 is a perspective view illustrating a partial configuration including an ejection head 100 and a silencer 102 of a gas fire extinguisher according to an embodiment of the present invention. FIG. 2 is a perspective view showing an ejection head 100 and a silencer 102 in FIG. 1. FIG. 2 is a cross-sectional view showing an ejection head 100 and a silencer 102 in FIG. 1. FIG. 6 is a partial enlarged cross-sectional view showing a state in which the guide member 121 is sandwiched between the attachment auxiliary member 103 and the second silencer 108. It is sectional drawing which shows the ejection head 700 and the silencer 701,701a which were experimented by this inventor. It is a figure which shows the time passage of the sound pressure level obtained when this inventor discharged | emitted fire extinguishing gas by the structure of FIG. It is sectional drawing which shows the ejection head 500 and the muffler means 502 and 502a which were experimented by this inventor. It is a figure which shows the time passage of the sound pressure level obtained when this inventor discharge | released fire extinguishing gas by the structure of FIG. It is sectional drawing which shows the gas fire extinguishing apparatus of other embodiment of this invention. It is a perspective view showing some composition including jet head 200 and silencer 202 of a gas fire extinguisher of one embodiment of the present invention. FIG. 11 is a perspective view showing an ejection head 200 and a silencer 202 in FIG. 10. It is sectional drawing which shows the ejection head 200 and the muffling means 202 of FIG. FIG. 6 is a partial enlarged cross-sectional view illustrating a state in which a guide member 221 is sandwiched between an ejection head main body 201 and a silencer 208. It is sectional drawing which shows the ejection head 500 and the muffler means 502 and 502a which were experimented by this inventor. It is a figure which shows the time passage of the sound pressure level obtained when this inventor discharged | emitted fire extinguishing gas by the structure of FIG. It is sectional drawing which shows the gas fire extinguishing apparatus of other embodiment of this invention. It is a perspective view which shows a part of structure including the injection head 300 of the gas fire extinguishing apparatus of one Embodiment of this invention, and the muffling means 302. FIG. 18 is a perspective view showing an ejection head 300 and a muffler 302 in FIG. 17. FIG. 18 is a cross-sectional view showing the ejection head 300 and the silencer 302 of FIG. 17. It is sectional drawing which shows the injection nozzle 500 and the muffler means 502 and 502a which were experimented by this inventor. It is a figure which shows the time passage of the sound pressure level obtained when this inventor discharged | emitted fire extinguishing gas by the structure of FIG. It is a perspective view which shows a part of structure including the injection head 400 and the silencer 402 of the gas fire extinguishing apparatus of one Embodiment of this invention. FIG. 23 is a perspective view showing an ejection head 400 and a silencer 402 in FIG. 22. FIG. 23 is a cross-sectional view showing the ejection head 400 and the silencer 402 in FIG. 22. FIG. 6 is a partial enlarged cross-sectional view showing a state in which a guide member 421 is sandwiched between an attachment assisting member 403 and a silencer 408. It is sectional drawing which shows the ejection head 700 and the silencer 701,701a which were experimented by this inventor. It is a figure which shows the time passage of the sound pressure level obtained when this inventor discharge | released fire extinguishing gas by the structure of FIG. It is sectional drawing which shows the ejection head 500 and the muffler means 502 and 502a which were experimented by this inventor. It is a figure which shows the time passage of the sound pressure level obtained when this inventor discharged | emitted fire extinguishing gas by the structure of FIG. It is sectional drawing which shows the gas fire extinguishing apparatus of other embodiment of this invention. It is a perspective view which shows a part of structure including the injection head 3 of the gas fire extinguishing apparatus of a prior art.

  FIG. 1 is a perspective view showing a partial configuration including an ejection head 100 and a sound deadening means 102 of a gas fire extinguishing apparatus according to an embodiment of the present invention. The gas fire extinguishing apparatus of this embodiment is provided in a fire extinguishing target section of a building, and the jet head 100 that jets a high-pressure fire extinguishing gas toward a space in the fire extinguishing target section is connected to the jet head 100, and the jet head is connected. A pipe 14 for introducing a high-pressure fire-extinguishing gas to 100, a fire-extinguishing gas supply source 15 for supplying a high-pressure fire-extinguishing gas to the pipe 14, and a nozzle hole 104 formed in the jet head 100 (see FIG. 3 described later) And a silencer 102 for attenuating the sound generated due to the injection of the fire extinguishing gas.

The fire extinguishing gas is realized by an incombustible gas such as N ₂ gas, CO ₂ gas, and halide gas. Such a fire extinguishing gas is sufficiently diffused even in a fire extinguishing target section having a fire extinguishing gas reaching distance of 15 m or more, for example, and the space in the fire extinguishing target section reaches a predetermined extinguishing agent concentration uniformly in a short time. Let the fire extinguish.

  The jet head 100 and the silencer 102 constitute a fire extinguishing gas jet unit 111. In such a fire extinguishing gas ejection unit 111, the fire extinguishing gas is supplied from the fire extinguishing gas supply source 15 to the ejection head 100 via the conduit 14. The conduit 14 includes a main pipe 23 connected to the fire extinguishing gas supply source 15, a branch pipe 18 interposed in the main pipe 23, and a branch pipe 19 connected to the branch pipe 18. A high-pressure fire extinguishing gas from the gas supply source 15 is guided to the ejection head 100. The conduit 14 is fastened to the base 20 and the bracket 21 by a fastener 22 such as a U-bolt, and is installed in a building frame in a state where vibration and displacement are suppressed.

  FIG. 2 is a perspective view showing the ejection head 100 and the silencer 102, and FIG. 3 is a cross-sectional view showing the ejection head 100 and the silencer 102. The ejection head 100 having a silencing function is installed on a wall in order to release the extinguishing gas to a fire extinguishing target section in a gas fire extinguishing facility that uses the extinguishing gas. Configured. A nozzle hole 104 that is a choke is directly formed in the ejection head main body 101. The nozzle hole 104 limits the flow rate of the fire extinguishing gas to a desired value.

  The attachment auxiliary member 103 has a base portion 105 and an outward flange 106 that is continuous with the base portion 105. The base 105 is detachably attached to the ejection head main body 101 with a screw 107.

  The silencer 102 is composed of first and second silencers 113 and 108 made of a porous material through which gas can flow. The second silencer 108 has a large diameter, and the first silencer 113 has a smaller diameter than the second silencer 108. In the first and second sound deadening materials 113 and 108, each of a plurality of members has a thin disc shape and a thin annular shape, and these members are laminated. The overall shape of the laminated first and second silencers 113 and 108 is substantially cylindrical.

  A rectifying member 109 is attached to the attachment assisting member 103 by a screw 110. The rectifying member 109 has a rectifying hole 112 that is a choke. In the rectifying member 109, the above-mentioned first silencer 113 made of a porous material through which gas can flow is accommodated. In the first silencer 113, each of a plurality of members has a thin disk shape, and these members are laminated. The rectifying hole 112 does not have a function of limiting the flow rate of the fire extinguishing gas, and serves to distribute and rectify the fire extinguishing gas decelerated and depressurized by the first silencing material 113 and guide it to the next second silencing material 108. . An annular member 114 is interposed between the end face of the outward flange 106 in the attachment auxiliary member 103 and the first silencer 113. The annular member 114 forms a gap 115 between the ejection head main body 101 and the first sound deadening material 113 for holding and storing foreign matter such as fine rust from the nozzle hole 104, thereby causing the foreign matter in the nozzle hole 104 to Prevent clogging.

  FIG. 4 is a partial enlarged cross-sectional view showing a state in which the guide member 121 is sandwiched between the attachment auxiliary member 103 and the second silencer 108. An end surface 120 on one side (the left side in FIGS. 2 and 3) of the second silencer 108 is disposed in contact with the annular mounting portion 122 of the guide member 121 so as to face the outward flange 106 of the mounting auxiliary member 103. Is done. The guide member 121 includes the attachment portion 122 and a short cylindrical guide portion 123 that continues to the attachment portion 122 and guides the fire extinguishing gas.

  The peripheral surface 124 of the second silencer 108 and the end surface 125 on the other side (the right side in FIGS. 2 and 3) fix the second silencer 108 to the outward flange 106 of the attachment auxiliary member 103 via the attachment member 127. Except for the portion in contact with the presser member 128 as a ring member to be released, it is released to the atmosphere. The shaft portion of the attachment member 127 is inserted into the holding member 128 (ring member, annular member), the second silencer 108, and the attachment portion 122 of the guide member 121, and is screwed to the outward flange 106 of the attachment auxiliary member 103. The

  As shown in FIG. 4, the mounting portion 122 of the guide member 121 fits into a mounting seat 131 formed in an annular recess in the outward flange 106 of the mounting assisting member 103, and is radially inward of the mounting seat 131. It protrudes from the end face 132 (below in FIG. 4) by a gap ΔL1.

  Referring again to FIG. 3, in the ejection head 100, the ejection head main body 101 includes a base portion 137 and an engaging portion 138 that continues to the base portion 137. The base portion 137 of the ejection head 100 is connected to the end portion 14a of the conduit 14 by a first screw 112, which is a taper screw, so as to be detachable and replaceable.

The attachment auxiliary member 103 is provided on the base 137 of the ejection head main body 101 so as to be detachable and replaceable. Various types of ejection head main bodies 101 having different diameters of the nozzle holes 104 are individually selected and used depending on the length of the conduit 14 and the like. The reason is described. The gas fire extinguishing apparatus is designed to quickly fill the space in the fire extinguishing gas with the fire extinguishing gas while securing a large flow rate (for example, 20,000 to 100,000 liters / minute) necessary for fire extinguishing which is its original function. It is necessary to ensure that a high flow rate (for example, 100 m / s) is ensured and the fire extinguishing gas can be released. For this purpose, the Fire Service Act enforcement regulations stipulate that the radiation pressure of the fire extinguishing gas from the nozzle hole 104 of the jet head 100 in the gas fire extinguishing apparatus is 1.9 MPa or more, and in practice it is 2 to 3 MPa (≈20 to 30 kgf / cm ² , yet higher (up to about 6 MPa≈60 kgf / cm ² ).

  Therefore, the value of the diameter of the nozzle hole 104 of the injection head 100 is such that the fire extinguishing gas injected from the nozzle hole 104 achieves the above-described large flow rate, high flow rate, and high radiation pressure from the fire extinguishing gas supply source 15. Depending on the length of the conduit 14 up to 100 installation locations, and thus on the line resistance, it must be set.

  For this reason, the diameter of the nozzle hole 104 varies depending on the length of the conduit 14 and the like. Therefore, for each installation location of the ejection head 100, various ejection heads 100 having different diameters of the nozzle holes 104 are individually selected and used. Must. Thus, in the gas fire extinguishing apparatus, various ejection heads 100 having different nozzle holes 104 are indispensable.

  The silencer 102 includes a first silencer 113, a second silencer 108, a pressing member 128, and an attachment member 127. The first and second silencers 113 and 108 are made of a porous material through which gas can flow, for example, made of a porous metal obtained by sintering fine metal powder or fine metal filaments, and the second silencer. The fine gap of the material 108 is smaller than the gap of the first sound deadening material 113, and a high pressure extinguishing gas can be effectively silenced without reducing the flow rate by smooth and slow decompression expansion. The first silencer 113 and the second silencer 108 depend on the flow conditions of the fire extinguishing gas, such as the diameter and length of the nozzle holes 104 and the rectifying holes 112, the number of nozzle holes 104 and the rectifying holes 112, and the positions where they are formed. Thus, porous materials with different voids can be appropriately selected and used. The first and second silencers 113 and 108 may be configured by laminating a plurality of layers of wire mesh, for example, or may be plate-like molded products or porous members made of synthetic resin fibers.

  The first and second silencers 113 and 108 are formed in a flat plate shape such as a disk, for example. The second silencer 108 has a larger diameter than the first silencer 113, and a plurality of sheets are laminated. . Each of the overall shape of the laminated first and second silencers 113 and 108 is, for example, a cylindrical shape. The end surface 120 on one side in the axial direction (left side in FIG. 3) of the laminated second sound deadening material 108 faces the right side in FIG. 3 at the engaging portion 138 to which a tool such as a spanner of the ejection head body 101 is engaged. Thus, for example, the peripheral surface 124 of the second muffler 108 disposed and laminated in contact with each other is opened to the atmosphere.

  The pressing member 128 presses the end surface 125 on the other side (right side in FIG. 3) of the stacked second silencer 108. The pressing member 128 has a flat plate shape and has a peripheral surface 124 that extends along the peripheral surface 124 of the second sound deadening material 108.

  In this embodiment, the attachment member 127 is a bolt as a screw member, and is denoted by the same reference numeral. A plurality of (for example, six) mounting members 127 are arranged at equal intervals around the axis L103. The shaft portion of the mounting member 127 is inserted through bolt insertion holes formed in the pressing member 128 and the second silencing material 108, and the head of the mounting member 127 is opposite to the second silencing material 108 of the pressing member 128. Lock to the side (right side in FIG. 3). The male screw formed on the shaft portion of the attachment member 127 is formed by opening a hole in the hooking portion 138, so that the male screw is detachably screwed onto the screw. As a result, the attachment member 127 sandwiches and fixes the laminated second silencer 108 between the engaging portion 138 and the pressing member 128.

  Each axis of the attachment member 127 is parallel to the axis L103 of the end 14a of the conduit 14. The axes of the end 14a of the conduit 14, the ejection head 100, and the silencer 102 are on a straight line. The workability of connecting the base portion 137 of the ejection head main body 101 to the end portion 14a of the conduit 14 with the first screw 112 in a state where the silencer 102 is attached to the ejection head 100 is good.

  The axis L103 of the end portion 14a of the conduit 14 is aligned with the axes of the ejection head 100 including the ejection head body 101, the second silencer 108, and the pressing member 128. Therefore, the workability of the connection by the first screw 112 between the end portion 14a of the conduit 14 and the base 137 of the ejection head main body 101 and the connection by the second screw 107 between the base 137 of the ejection head main body 101 and the rectifying member 109 is as follows. It is good. The good connection workability means that in many cases, the ejection head 100 and the sound deadening means 102 have a ceiling higher than that of a person who is not a hindrance to movement of people in the fire extinguishing target section in the building. It is important in view of being connected to such places.

  During fire extinguishing, the high-pressure fire extinguishing gas injected through the nozzle hole 104 gradually passes through the fine gap of the second sound deadening material 108, that is, smoothly and smoothly, and expands under reduced pressure, generating sound. Is suppressed and injected into the space in the fire extinguishing target section in the building. The fire extinguishing gas from the peripheral surface 124 of the first sound deadening material 108 is sprayed radially in the vicinity of the ceiling in a radial manner, and can be diffused uniformly and quickly over the entire space in the fire extinguishing target section. Therefore, quick fire extinguishing of the fire extinguishing target section can be achieved.

  The second silencer 108 can attenuate the sound caused by the jet flow of the fire extinguishing gas from the jet head while reducing the size of the structure, accurately adjusting the jetting and silencing characteristics, and reducing the fire extinguishing gas flow rate. A great sound reduction effect can be achieved without doing so.

  In the above-described embodiment, the silencer 102 having a complicated configuration compared to the ejection head 100 can be attached to and detached from various ejection heads 100 having different nozzle holes 104 by the mounting member 127. The second silencers 113 and 108 can be used in common for the various ejection heads 100. This sharing facilitates mass production of the first and second silencing materials 113 and 108 and improves productivity.

  In addition, depending on whether or not there is a need for noise suppression in the fire extinguishing target section, individual selection and use can be easily performed. Simplification can be achieved. Further, the silencer 102 that has been removed from the fire extinguishing target section that no longer needs to be silenced can be attached to another fire extinguishing target section to be silenced and reused. Is achieved.

  In another embodiment of the present invention, the ejection head 100 and the muffler 102 may be configured integrally, i.e., not removable. In this embodiment, the base 137 of the jet head main body 101 is provided on the end portion 14a of the conduit 14 so as to be attachable / detachable by the first screw 112, and various jet heads 100 having different nozzle holes 104 are individually provided. It may be selected and used.

  Further, the ejection head 100 and the muffling means 102 are connected in advance by the second screw 107 and the mounting member 127 to form an assembly, and then the base 137 of the ejection head body 101 in this assembly is connected to the end of the conduit 14. The workability of connecting to the portion 14a by the first screw 112 is also good.

  Furthermore, in order to make the existing fire extinguishing target section, in which the base 137 of the jet head main body 101 is connected to the end portion 14a of the conduit 14 by the first screw 112, the fire extinguishing target section to be silenced, the engagement of the jet head main body 101 is engaged. When the silencer 102 is connected to the portion 138 by the second screw 107, the connection workability is also good.

  A gap 115 exists between the end surface of the first silencer 113 facing the nozzle hole 104 and the end surface of the ejection head body 101 facing the first silencer 113. When the fire extinguishing gas is injected from the nozzle hole 104, fine foreign substances are stored and stored in the gap, so that the nozzle holes 104 can be prevented from being clogged by foreign substances, and noise caused by the clogging of foreign substances can be prevented. It is possible to prevent a decrease in flow rate during generation and discharge.

  The foreign matter exists in the conduit 14, for example, a scale and slag due to welding in the conduit 14, and when the conduit is a plated pipe, a stripped piece of a plating layer in the plated pipe, rust, and a seal material used in a pipe joint. Such as debris. Further, an injection reaction force acting in the backward direction (left side in FIG. 3) from the injection head 100 to the conduit 14 during the fire extinguishing gas injection due to the decompression inside the ejection head 100 and the discharge of the fire extinguishing gas radially outward. It can be reduced to about 1/9 of the prior art shown in FIG.

  In another embodiment of the present invention, an ejection head 700 in which the end face disposed on the nozzle hole 104 side of the first silencer 113 in the above-described embodiment, the ejection head main body 101, and the attachment auxiliary member 103 are integrated. It has been confirmed by the present inventor that the silencing effect does not deteriorate even if the first silencing material 113 is separated from the end face disposed opposite to the first silencing material 113. The experiment and its results are described below with reference to FIGS.

FIG. 5 is a cross-sectional view showing the ejection head 700 and the silencers 701 and 701a that have been tested by the present inventor. FIG. 6 shows the results obtained when the present inventor releases a fire extinguishing gas with the configuration of FIG. It is a figure which shows the time passage of the sound pressure level given. In FIG. 5A, the fire extinguishing gas that is N ₂ gas from the conduit 714 is ejected from the nozzle hole 704 of the ejection head 700.

  In the rectifying member 703 attached to the ejection head 700, four first silencing members 705 are stacked and stored. In addition, on the downstream side (right side in FIG. 5) of the fire extinguishing gas discharge direction of the flow regulating member 703, three second sound deadening materials 706 are laminated and arranged. The fire extinguishing gas that has passed through the first silencing material 705 is rectified through the rectifying hole 707 of the rectifying member 703, flows into the second silencing material 708, and radially outwards from the peripheral surface 709 of the second silencing material 708. And is discharged from the discharge hole 752 of the pressing member 728 to the space in the fire extinguishing target section. The first silencer 705 is in close contact with the flat end surface of the outlet end of the nozzle hole 704 of the ejection head 500.

The supply pressure of the extinguishing gas supplied from the conduit 714 to the ejection head 700 is, for example, 3 MPa to 7 MPa, the discharge flow rate of the extinguishing gas is about 55 m ³ / min, and the flow rate of the extinguishing gas discharged from the nozzle hole 504 Is about 60-100 m / sec. The void ratio of the silencer 508 used in this experiment is about 97%, the diameter is about 130 mm, the thickness of the first silencer 706 is 5 mm / sheet, and the thickness of the second silencer 708 is 10 mm / It is a sheet.

  In FIG. 5 (2), the first silencer 705 of the silencer 701a is disposed with a gap 753 of about 1 mm from the flat end surface of the outlet end of the nozzle hole 704 of the ejection head 700, and other configurations are shown in FIG. This is the same as 5 (1).

  FIG. 6 is a diagram showing the time lapse of the sound pressure level obtained when the present inventor released fire extinguishing gas with the configuration of FIG. The line 754 is an experimental result by a configuration in which the first silencer 705 is brought into close contact with the flat end surface of the outlet end of the nozzle hole 704 as shown in FIG. This is an experimental result by a configuration in which the first silencer 705 is arranged with a gap 753 from the flat end surface of the outlet end of the nozzle hole 704 as shown in FIG.

  From these experimental results, according to the configuration in which the first silencer 705 is brought into close contact with the flat end surface of the outlet end of the nozzle hole 704 (FIG. 5A), a configuration in which a gap 753 is provided ( Compared to FIG. 5 (2)), it was confirmed that there was almost no difference in the silencing effect. Therefore, it is confirmed that the silencing effect is not lowered even if a gap 753 is formed between the end face of the first silencer 705 facing the nozzle hole 704 and the end face of the ejection head 700 facing the first silencer 705. It was.

  By providing such a gap 753 between the end surface of the first silencer 705 facing the nozzle hole 704 and the end surface of the ejection head 700 facing the first silencer 705, without reducing the silencing effect, When the fine foreign matter is stored and stored in the gap 753 and the fire extinguishing gas is injected from the nozzle hole 704, the first and second silencing materials 705 and 706 are prevented from being clogged by the foreign matter, and the foreign matter Generation of noise due to clogging can be prevented. Foreign matter is present in the conduit 14, for example, a scale and slag formed by welding in the conduit 14, and when the conduit 14 is a plated tube, a stripped piece of a plated layer in the plated tube, rust, and a sealing material used in a pipe joint Such as debris.

FIG. 7 is a cross-sectional view showing the ejection head 500 and the sound deadening means 502 and 502a that have been tested by the present inventors. In FIG. 7A, the fire extinguishing gas that is N ₂ gas from the conduit 514 is ejected from the nozzle hole 504 of the ejection head 500.

  Eleven silencers 508 are stacked and housed in a right cylindrical housing 551 of the silencer 502 attached to the ejection head 500. The fire extinguishing gas that has passed through the sound deadening material 508 is discharged from the discharge hole 552 of the housing 551 into the space in the fire extinguishing target section. The sound deadening material 508 comes into close contact with the flat end surface of the outlet end of the nozzle hole 504 of the ejection head 500.

The supply pressure of the fire extinguishing gas supplied from the conduit 514 to the ejection head 500 is, for example, 3 MPa to 7 MPa, the discharge flow rate of the fire extinguishing gas is about 55 m ³ / min, and the flow rate of the fire extinguishing gas discharged from the nozzle hole 504 Is about 60-100 m / sec. The void ratio of the silencer 508 used in this experiment is about 97%, the diameter is about 130 mm, and the thickness is 10 mm / sheet.

  In FIG. 7 (2), the silencer 508 of the silencer 502a is disposed with a gap 553 of about 1 mm from the flat end surface of the outlet end of the nozzle hole 504 of the ejection head 500, and other configurations are shown in FIG. Same as 1).

  FIG. 8 is a diagram showing the time lapse of the sound pressure level obtained when the inventor released fire extinguishing gas with the configuration of FIG. As shown in FIG. 7A, the line 554 is an experimental result based on a configuration in which the silencer 508 is brought into close contact with the flat end surface of the outlet end of the nozzle hole 504, and the line 555 shows the result of FIG. As described above, it is an experimental result by a configuration in which the sound deadening material 508 is disposed with a gap 553 from the flat end face of the outlet end of the nozzle hole 504.

  From these experimental results, according to the configuration in which the silencer 508 is in close contact with the flat end surface of the outlet end of the nozzle hole 504 (FIG. 7A), the configuration in which the gap 553 is disposed (FIG. 7). Compared to (2)), it was confirmed that a large silencing effect of about 16 dB was obtained. Therefore, according to the embodiment in which the end surface facing the nozzle hole 504 of the silencer 508 and the end surface facing the silencer 508 of the ejection head 500 are in close contact with each other, it is confirmed that the silencing effect is improved. It was done.

  FIG. 9 is a cross-sectional view showing a gas fire extinguishing apparatus according to another embodiment of the present invention. In the sound extinguishing means 600 of this gas fire extinguishing apparatus, the above-described guide member 121 is omitted. The function of the guide member 121 will be described with reference to FIG.

  The fire extinguishing gas from the plurality of nozzle holes 609 formed uniformly distributed over the entire surface of the flat nozzle portion 608 of the ejection head body 601 is ejected along mutually parallel axes of the nozzle holes 609, The first silencer 613 and the second silencer 610 disposed downstream of the nozzle hole 609 gradually pass through a fine gap, that is, smoothly and smoothly, and expand under reduced pressure. The axes of the ejection head main body 601 and the first and second silencers 613 and 610 are on a straight line. The fine gaps in the first and second sound deadening materials 613 and 610 give pressure loss to the fire extinguishing gas passing through them.

  The fire extinguishing gas jetted into the second silencer 610 through the second silencer 613 and the rectifying hole 612 of the rectifying member 611 after being jetted along the axis of each nozzle hole 609 in the second silencer 610. Is assumed to be a straight line for simplification, the path length from each rectifying hole 612 to the most downstream end face of the second silencer 610 whose overall shape is substantially a right circular cylinder is shown in FIG. In FIG. 9, it is indicated by reference numeral L601.

  The path length from the side of the rectifying member 611 to the peripheral surface 614 of the second silencer 610 is indicated by a reference symbol L602 in FIG. In order to increase the flow rate of the fire extinguishing gas injected from the rectifying hole 612, when the outer diameter of the rectifying member 611 is configured to be relatively larger than the length in the axial direction of the second silencer 610, L601> L602.

  The pressure loss acting on the fire extinguishing gas is proportional to these path lengths L601 and L602. Therefore, the distribution of the pressure loss in the second sound deadening material 610 is as shown by the isobaric line 603 connecting the positions where the same pressure loss occurs. . The pressure loss is greatest in the region on the axis line of the second sound deadening material 610, and becomes smaller as the region goes away from the axis line. Since the fire-extinguishing gas injected from the rectifying hole 612 easily flows through the region where the pressure loss is small, the fire-extinguishing gas in the second sound deadening material 610 is indicated by an imaginary line reference numeral 604 in the axial direction of the ejection head body 601. As shown, it also proceeds sideways as indicated by reference numeral 605 and further in the backward direction as indicated by reference numeral 606. The lengths of the reference numerals 604, 605, and 606 are shown corresponding to the flow rate of the fire extinguishing gas, and a relatively large flow rate of the fire extinguishing gas flows in the side and back directions. In order to quickly fill the fire extinguishing target section with the fire extinguishing gas, the second sound deadening material installed in the vicinity of the wall surface (the left side in FIG. 9) among the plurality of second sound deadening materials 610 extends along the axial direction of the ejection head main body 601. Of fire extinguishing gas that is injected in the direction indicated by phantom line reference 604 and sideways in the direction indicated by reference numeral 605 at the highest possible flow rate and proceeds in the backward direction as indicated by reference numeral 606. The flow must be suppressed.

  In each of the embodiments described above with reference to FIGS. 1 to 8 of the present invention, the guide member 121 is the direction behind the FIG. 9 among the fire extinguishing gases injected from the sound deadening materials 113, 108; 705, 708. The fire extinguishing gas that travels to 606 is blocked and travels in the axial direction 604 and side 605 of the ejection head body 101 and the ejection head 700. As a result, for example, even in a large fire extinguishing target section having a fire extinguishing gas reach distance of 15 m or more, the fire extinguishing gas is sufficiently diffused so that the space in the fire extinguishing target section is uniformly and quickly set to a predetermined extinguishing agent concentration. Let it reach and be extinguished.

  The gas fire extinguishing apparatus of the present invention releases a fire extinguishing gas as a fire extinguishing agent into a space in a fire extinguishing target section of a building when a fire occurs, thereby sufficiently spreading the fire extinguishing gas even in a large fire extinguishing target fire extinguisher. Can be implemented over a wide range.

  A fire extinguishing gas jetting apparatus that jets a high-pressure fire extinguishing gas toward a space in a fire extinguishing target section in a building, the fire extinguishing gas jetting apparatus including an ejection head 100 and the ejection of the fire extinguishing gas from the ejection head 100 The sound deadening means 102 for attenuating the sound caused by the sound deadening means 102, the sound deadening means 102, the second sound deadening material 108 provided as the first sound deadening member provided on the ejection head 100 side, and the downstream side of the first sound deadening member A second silencing member 108 as a second silencing member, each of the first and second silencing members being formed in a flat plate shape and made of a porous material through which gas can flow. Become. The first and second silencing members are stacked to form a cylindrical shape. The first and second silencing members have the same outer diameter. The first and second silencing members have the same thickness. The entire outer peripheral surfaces of the first and second silencing members are exposed to the atmosphere. A pressing member 128 as a ring member for fixing the second silencing member is further provided. The silencer includes a first silencer 113 as a first silencer located on the upstream side and a second silencer 108 as a second silencer located on the downstream side, and the first silencer and A rectifying member as an intermediate member through which gas can flow is disposed between the second silencing means.

  By forming the silencing member in a flat plate shape, the silencing member is easily bent. As a result, damage to the sound deadening member can be prevented.

  FIG. 10 is a perspective view showing a partial configuration including the ejection head 200 and the sound deadening means 202 of the gas fire extinguishing apparatus according to the embodiment of the present invention. The gas fire extinguishing apparatus of the present embodiment is provided in a fire extinguishing target section of a building, and the jet head 200 that jets a high-pressure fire extinguishing gas toward a space in the fire extinguishing target section is connected to the jet head 200, and the jet head 200 is injected from a conduit 14 for introducing a high-pressure fire extinguishing gas to 200, a fire-extinguishing gas supply source 15 for supplying a high-pressure fire extinguishing gas to the conduit 14, and a nozzle hole 204 (see FIG. 12 described later) formed in the ejection head 200. And a muffler 202 for attenuating sound generated due to the injection of the fire extinguishing gas.

The fire extinguishing gas is realized by an incombustible gas such as N ₂ gas, CO ₂ gas, and halide gas. Such a fire extinguishing gas is sufficiently diffused even in a fire extinguishing target section having a fire extinguishing gas reaching distance of 15 m or more, for example, and the space in the fire extinguishing target section reaches a predetermined extinguishing agent concentration uniformly in a short time. Let the fire extinguish.

  A fire extinguishing gas ejection unit 211 is configured by the ejection head 200 and the sound deadening means 202. In such a fire extinguishing gas injection unit 211, the fire extinguishing gas is supplied from the fire extinguishing gas supply source 15 to the ejection head 200 via the conduit 14. The conduit 14 includes a main pipe 23 connected to the fire extinguishing gas supply source 15, a branch pipe 18 interposed in the main pipe 23, and a branch pipe 19 connected to the branch pipe 18. A high-pressure fire extinguishing gas from the gas supply source 15 is guided to the ejection head 200. The conduit 14 is fastened to the base 20 and the bracket 21 by a fastener 22 such as a U-bolt, and is installed in a building frame in a state where vibration and displacement are suppressed.

  FIG. 11 is a perspective view showing the ejection head 200 and the silencer 202, and FIG. 12 is a cross-sectional view showing the ejection head 200 and the silencer 202. An ejection head 200 having a silencing function is installed on a wall in a gas fire extinguishing equipment using a fire extinguishing gas so as to release the extinguishing gas to a fire extinguishing target section, and the silencing means 202 is attached to the ejection head main body 201 such as a bolt. 227 is detachably attached. A nozzle hole 204 that is a choke is directly formed in the ejection head main body 201. The nozzle hole 204 limits the flow rate of the fire extinguishing gas to a desired value.

  The ejection head main body 201 includes a base portion 205 and an outward flange 206 connected to the base portion 205. The base 205 is detachably attached to the ejection head main body 201 with a screw 207.

  The silencer 202 is constituted by a silencer 208 made of a porous material through which gas can flow. In the sound deadening material 208, each of a plurality of members has a thin disc shape and a thin annular shape, and these members are laminated. The overall shape of the laminated silencer 208 is substantially cylindrical.

  FIG. 13 is a partial enlarged cross-sectional view illustrating a state in which the guide member 221 is sandwiched between the ejection head main body 201 and the sound deadening material 208. An end surface 220 on one side (the left side in FIGS. 12 and 13) of the sound deadening material 208 is disposed in contact with the annular mounting portion 222 of the guide member 221 so as to face the outward flange 206 of the ejection head main body 201. . The guide member 221 includes the attachment portion 222 and a short cylindrical guide portion 223 that continues to the attachment portion 222 and guides the fire extinguishing gas.

  The peripheral surface 224 and the end surface 225 on the other side (the right side in FIG. 12) of the silencer 208 are in contact with a presser member 228 that fixes the silencer 208 to the outward flange 206 of the ejection head main body 201 via the attachment member 227. Except for, it is open to the atmosphere. The shaft portion of the mounting member 227 is inserted through the pressing member 228, the sound deadening material 208, and the mounting portion 222 of the guide member 221, and is screwed to the outward flange 206 of the ejection head main body 201.

  As shown in FIG. 13, the mounting portion 222 of the guide member 221 fits into a mounting seat 231 formed in an annular recess in the outward flange 206 of the ejection head main body 201, and is radially inward of the mounting seat 231. It protrudes from the end face 232 (below in FIG. 13) by a gap ΔL1.

  Referring to FIG. 12 again, in the ejection head 200, the ejection head main body 201 includes a base portion 205 and an outward flange 206 that is continuous with the base portion 205. The base portion 205 of the ejection head 200 is connected to the end portion 14a of the conduit 14 by a first screw 212 that is a taper screw so as to be detachable and replaceable.

The ejection head main body 201 is provided on the base 205 of the ejection head main body 201 so as to be detachable and replaceable. Various types of ejection head main bodies 201 having different diameters of the nozzle holes 204 are individually selected and used depending on the length of the conduit 14 and the like. The reason is described. The gas fire extinguishing apparatus is designed to quickly fill the space in the fire extinguishing gas with the fire extinguishing gas while securing a large flow rate (for example, 20,000 to 100,000 liters / minute) necessary for fire extinguishing which is its original function. It is necessary to ensure that a high flow rate (for example, 100 m / s) is ensured and the fire extinguishing gas can be released. Therefore, the Fire Service Law enforcement regulations stipulate that the radiation pressure of the fire extinguishing gas from the nozzle hole 204 of the jet head 200 in the gas fire extinguishing apparatus is 1.9 MPa or more, and in practice, 2 to 3 MPa (≈20 to 30 kgf / cm ² , yet higher (up to about 6 MPa≈60 kgf / cm ² ).

  Therefore, the value of the diameter of the nozzle hole 204 of the ejection head 200 is such that the fire extinguishing gas ejected from the nozzle hole 204 achieves the aforementioned large flow rate, high flow rate, and high radiation pressure from the fire extinguishing gas supply source 15. Depending on the length of the conduit 14 up to 200 installation locations and thus on the line resistance, it must be set.

  For this reason, the diameter of the nozzle hole 204 varies depending on the length of the conduit 14 and the like. Therefore, various ejection heads 200 having different diameters of the nozzle holes 204 are individually selected and used for each installation location of the ejection head 200. Must. Thus, in the gas fire extinguishing apparatus, various ejection heads 200 having different nozzle holes 204 are indispensable.

  The silencer 202 includes a silencer 208, a pressing member 228 and an attachment member 227. The sound deadening material 208 is made of a porous material through which a gas can circulate, for example, made of a porous metal obtained by sintering fine metal powder or fine metal filaments, etc. The silencing effect can be effectively realized without reducing the flow rate by decompression expansion. For such a sound deadening material 208, porous materials with different gaps can be appropriately selected and used in accordance with the flow conditions of the fire extinguishing gas such as the diameter, length, number, and formation position of the nozzle holes 204. Further, the sound deadening material 208 may be configured by laminating a plurality of layers of wire mesh, for example, or may be a plate-like molded product or a porous member made of synthetic resin fibers.

  The silencer 208 is formed in a flat plate shape such as a circular plate, for example, and a plurality of sheets are laminated. Each of the overall shape of the laminated silencer 208 is, for example, a cylindrical shape. An end surface 220 on one side in the axial direction of the laminated sound deadening material 208 (left side in FIG. 12) faces the jet head main body 201, for example, is in contact therewith, and a circumferential surface 224 of the laminated sound deadening material 208 is , Open to the atmosphere.

  The pressing member 228 presses the end surface 225 on the other side (right side in FIG. 12) of the laminated silencer 208. The pressing member 228 has a flat plate shape and is made of a ring-shaped metal extending along the peripheral edge portion of the sound deadening material 208.

  In this embodiment, the attachment member 227 is a bolt as a screw member, and is denoted by the same reference numeral. A plurality (for example, 3) of the attachment members 227 are arranged symmetrically around the axis L203 at equal intervals. The shaft portion of the attachment member 227 is inserted through a bolt insertion hole formed in each of the holding member 228 and the silencer 208, and the head of the attachment member 227 is on the side opposite to the silencer 208 (FIG. 12). To the right). The external thread formed on the shaft portion of the attachment member 227 is cut and formed in the outward flange 206 of the ejection head main body 201 so that the external thread is detachably screwed onto the screw. As a result, the mounting member 227 holds the laminated sound deadening material 208 between the outward flange 206 and the pressing member 228 and fixes it.

  Each axis of the mounting member 227 is parallel to the axis L103 of the end 14a of the conduit 14. The axes of the end 14a of the conduit 14, the ejection head 200, and the silencer 202 are on a straight line. The workability of connecting the base portion 205 of the ejection head main body 201 to the end portion 14a of the conduit 14 with the first screw 212 in a state where the silencer 202 is attached to the ejection head 200 is good.

  The axis L103 of the end portion 14a of the conduit 14 is aligned with the axes of the ejection head 200 including the ejection head main body 201, the sound deadening material 208, and the pressing member 228. Therefore, the workability of the connection by the first screw 212 between the end portion 14a of the conduit 14 and the base 205 of the ejection head main body 201 and the connection by the second screw 207 between the ejection head main body 201 and the nozzle member 234 is good. . The good connection workability means that in many cases, the ejection head 200 and the sound deadening means 202 are higher in the ceiling than a person who is a place that does not hinder human movement in the fire extinguishing target section in the building. It is important in view of being connected to such places.

  At the time of fire extinguishing, the high-pressure fire extinguishing gas injected through the nozzle hole 204 passes through the fine gaps of the sound deadening material 208, and gradually, smoothly and smoothly passes and expands under reduced pressure, reducing the generation of sound. Suppressed and injected into the space in the fire extinguishing target compartment in the building. The fire extinguishing gas from the peripheral surface 224 of the sound deadening material 208 can be sprayed radially and horizontally in the vicinity of the ceiling, and can be uniformly and quickly diffused throughout the space in the fire extinguishing target section. Therefore, quick fire extinguishing of the fire extinguishing target section can be achieved.

  The sound deadening material 208 can attenuate the sound caused by the jet flow of the fire extinguishing gas from the jet head while reducing the size of the structure, and can accurately adjust the characteristics of the jetting and silencing without reducing the flow rate of the fire extinguishing gas. In addition, a great acoustic reduction effect can be achieved.

  In the above-described embodiment, the silencer 202 having a complicated configuration as compared with the ejection head 200 can be attached to and removed from the various ejection heads 200 having the nozzle holes 204 having different diameters by the mounting member 227. Can be used in common for various ejection heads 200. This sharing facilitates mass production of the sound deadening material 208 and improves productivity.

  In addition, depending on whether or not there is a need for noise suppression in the fire extinguishing target section, individual selection and use can be easily performed. Simplification can be achieved. Further, the silencer 202 removed from the fire extinguishing target section that no longer needs to be silenced can be attached to another fire extinguishing target section to be silenced and reused, thereby improving economy and saving energy. Is achieved.

  In another embodiment of the present invention, the ejection head 200 and the muffling means 202 may be configured so as to be integrated, that is, cannot be removed. In this embodiment, the base portion 205 of the ejection head main body 201 is provided on the end portion 14a of the conduit 14 so as to be detachable and replaceable by the first screw 212, and various ejection heads 200 having different nozzle holes 204 are individually provided. It may be selected and used.

  Further, the ejection head 200 and the nozzle member 234 are connected in advance by a second screw 207 to form an assembly, and thereafter, the base 205 of the ejection head main body 201 in this assembly is connected to the end portion 14a of the conduit 14. The workability connected by the first screw 212 is also good.

  Furthermore, in order to make the existing fire extinguishing target section, in which the base 205 of the jet head main body 201 is connected to the end portion 14a of the conduit 14 by the first screw 212, the fire extinguishing target section to be silenced, When the silencer 202 is connected by the attachment member 227, the connection workability is also good.

  A gap 215 having an interval ΔL <b> 2 in the direction of the axis L <b> 203 exists between the end face facing the nozzle hole 204 of the silencer 208 and the end face facing the silencer 208 of the ejection head body 201. When the fire extinguishing gas is injected from the nozzle hole 204, fine foreign substances are stored and stored in the gap, so that the nozzle holes 204 can be prevented from being clogged by foreign substances, and noise caused by the clogging of foreign substances can be prevented. It is possible to prevent a decrease in flow rate during generation and discharge.

  The foreign matter exists in the conduit 14, for example, a scale and slag due to welding in the conduit 14, and when the conduit is a plated pipe, a stripped piece of a plating layer in the plated pipe, rust, and a seal material used in a pipe joint. Such as debris. Further, an injection reaction force acting in the backward direction (left side in FIG. 12) from the ejection head 100 to the conduit 14 at the time of fire extinguishing gas injection due to the decompression inside the ejection head 100 and the discharge of the fire extinguishing gas outward in the radial direction. This can be reduced to about 1/9 of the prior art shown in FIG.

  In another embodiment of the present invention, the end surface disposed on the nozzle hole 204 side of the silencer 208 in the above-described embodiment and the end surface disposed opposite to the silencer 208 of the ejection head main body 201. It was confirmed by the present inventor that the silencing effect does not decrease even if the gaps are separated. The experiment and the results will be described below with reference to FIGS.

FIG. 14 is a cross-sectional view showing the ejection head 500 and the sound deadening means 502 and 502a that have been tested by the present inventors. In FIG. 14 (1), the fire extinguishing gas that is N ₂ gas from the conduit 514 is ejected from the nozzle hole 504 of the ejection head 500.

  Eleven silencers 508 are stacked and housed in a right cylindrical housing 551 of the silencer 502 attached to the ejection head 500. The fire extinguishing gas that has passed through the sound deadening material 508 is discharged from the discharge hole 552 of the housing 551 into the space in the fire extinguishing target section. The sound deadening material 508 comes into close contact with the flat end surface of the outlet end of the nozzle hole 504 of the ejection head 500.

The supply pressure of the fire extinguishing gas supplied from the conduit 514 to the ejection head 500 is, for example, 3 MPa to 7 MPa, the discharge flow rate of the fire extinguishing gas is about 55 m ³ / min, and the flow rate of the fire extinguishing gas discharged from the nozzle hole 504 Is about 60-100 m / sec. The void ratio of the silencer 508 used in this experiment is about 97%, the diameter is about 130 mm, and the thickness is 10 mm / sheet.

  In FIG. 14 (2), the silencer 508 of the silencer 502a is disposed with a gap 553 of about 1 mm from the flat end surface of the outlet end of the nozzle hole 504 of the ejection head 500, and other configurations are shown in FIG. Same as 1).

  FIG. 15 is a diagram showing the time lapse of the sound pressure level obtained when the present inventor released fire extinguishing gas with the configuration of FIG. As shown in FIG. 14 (1), the line 554 is an experimental result obtained by a configuration in which the silencer 508 is brought into close contact with the flat end surface of the outlet end of the nozzle hole 504, and the line 555 is shown in FIG. 14 (2). As described above, it is an experimental result by a configuration in which the sound deadening material 508 is disposed with a gap 553 from the flat end face of the outlet end of the nozzle hole 504.

  From these experimental results, according to the configuration in which the silencer 508 is in close contact with the flat end surface of the outlet end of the nozzle hole 504 (FIG. 14 (1)), the configuration in which the gap 553 is disposed (FIG. 14). Compared to (2)), it was confirmed that a large silencing effect of about 16 dB was obtained. Therefore, according to the embodiment in which the end surface facing the nozzle hole 504 of the silencer 508 and the end surface facing the silencer 508 of the ejection head 500 are in close contact with each other, it is confirmed that the silencing effect is improved. It was done.

  Accordingly, as in the embodiment of FIGS. 10 to 13, a gap 215 is provided between the end face of the muffler 208 facing the nozzle hole 204 and the end face of the ejection head body 201 facing the muffler 208. At this time, by setting the interval ΔL2 in the direction of the axis L203 to a range in which the silencing effect is not reduced, for example, 0.1 mm to 1.5 mm, the silencing material 208 is clogged by foreign matter without substantially reducing the silencing effect. Can be prevented.

  FIG. 16 is a cross-sectional view showing a gas fire extinguisher according to another embodiment of the present invention. In the sound extinguishing means 600 of this gas fire extinguishing apparatus, the above-described guide member 221 is omitted. The function of the guide member 221 will be described with reference to FIG.

  The fire extinguishing gas from the plurality of nozzle holes 609 formed uniformly distributed over the entire surface of the nozzle portion 608 corresponding to the flat end wall 241 of the ejection head main body 601 is parallel to the nozzle holes 609. It is sprayed along a specific axis and gradually passes through the fine gap of the silencer 613 disposed downstream of the nozzle hole 609, that is, smoothly and smoothly, and expands under reduced pressure. Each axis of the ejection head main body 601 and the sound deadening material 613 is on a straight line. The fine air gaps of the sound deadening material 613 give pressure loss to the fire extinguishing gas passing through them.

  Assuming that the path of the fire extinguishing gas injected from the nozzle hole 609 into the sound deadening material 613 is a straight line for simplification, the entire shape of the sound deadening material 613 is almost a right circular cylinder from the nozzle portion 608. The path length to the most downstream end face is indicated by reference numeral L601 in FIG.

  The path length from the side part of the nozzle part 608 to the peripheral surface of the sound deadening material 613 is indicated by a reference symbol L602 in FIG. In order to increase the flow rate of the fire extinguishing gas ejected from the nozzle part 608, when the outer diameter of the nozzle part 608 is configured to be relatively larger than the length of the sound deadening material 613 in the axial direction, L601> L602.

  The pressure loss acting on the fire extinguishing gas is proportional to these path lengths L601 and L602. Therefore, the distribution of the pressure loss in the sound deadening material 613 is as shown by the isobaric line 603 connecting the positions where the same pressure loss occurs. The pressure loss is the largest in the region on the axis of the sound deadening material 613, and becomes smaller as the region goes farther away from the axis. Since the fire extinguishing gas ejected from the nozzle part 608 is likely to flow through the region where the pressure loss is small, the fire extinguishing gas in the sound deadening material 613 is indicated by an imaginary reference numeral 604 in the axial direction of the ejection head body 601. And proceed sideways as indicated by reference numeral 605 and further in the backward direction as indicated by reference numeral 606. The lengths of the reference numerals 604, 605, and 606 are shown corresponding to the flow rate of the fire extinguishing gas, and a relatively large flow rate of the fire extinguishing gas flows in the side and back directions. In order to quickly fill the fire extinguishing gas with the fire extinguishing gas, a virtual line is formed along the axial direction of the ejection head main body 601 from the silencing material installed near the wall surface (left side in FIG. 16) among the plurality of silencing materials 613. Inject in the direction indicated by reference numeral 604 and laterally in the direction indicated by reference numeral 605 at as high a flow rate as possible to suppress the flow rate of the fire extinguishing gas traveling in the backward direction as indicated by reference numeral 606. There must be.

  In each of the embodiments described above with reference to FIGS. 10 to 16 of the present invention, the guide member 221 is a fire extinguishing gas that travels in the direction 606 behind FIG. And is advanced in the axial direction 604 and the side 605 of the ejection head main body 601. As a result, for example, even in a large fire extinguishing target section having a fire extinguishing gas reach distance of 15 m or more, the fire extinguishing gas is sufficiently diffused so that the space in the fire extinguishing target section is uniformly and quickly set to a predetermined extinguishing agent concentration. Let it reach and be extinguished.

  The gas fire extinguishing apparatus of the present invention releases a fire extinguishing gas as a fire extinguishing agent into a space in a fire extinguishing target section of a building when a fire occurs, thereby sufficiently spreading the fire extinguishing gas even in a large fire extinguishing target fire extinguisher. Can be implemented over a wide range.

  A fire extinguishing gas jetting apparatus that jets a high-pressure fire extinguishing gas toward a space in a fire extinguishing target section in a building, the fire extinguishing gas jetting apparatus including an ejection head 100 and the ejection of the fire extinguishing gas from the ejection head 100 And a silencer 202 for attenuating the sound caused by the noise. The silencer 202 is provided on the downstream side of the silencer 208 as a first silencer provided on the ejection head 100 side, and on the downstream side of the first silencer. The first and second silencing members are each formed in a flat plate shape and are made of a porous material through which gas can flow. The first and second silencing members are stacked to form a cylindrical shape. The first and second silencing members have the same outer diameter. The first and second silencing members have the same thickness. The entire outer peripheral surfaces of the first and second silencing members are exposed to the atmosphere. A pressing member 228 is further provided as an annular member for fixing the second silencing member.

  FIG. 17 is a perspective view showing a partial configuration including the jet head 300 and the sound deadening means 302 of the gas fire extinguishing apparatus according to the embodiment of the present invention. The gas fire extinguishing apparatus according to the present embodiment is provided in a fire extinguishing target section of a building, and the jet head 300 that jets a high-pressure fire extinguishing gas toward a space in the fire extinguishing target section is connected to the jet head 300. From a conduit 314 for introducing a high-pressure fire extinguishing gas to 300, a fire-extinguishing gas supply source 315 for supplying a high-pressure fire extinguishing gas to the conduit 314, and a nozzle hole 304 (see FIG. 19 described later) formed in the ejection head 300 And a muffler 302 for attenuating sound generated due to the injection of the fire extinguishing gas.

The fire extinguishing gas is realized by an inert gas such as N ₂ gas and CO ₂ gas or an active gas such as halide gas. Such a fire extinguishing gas is sufficiently diffused even in a fire extinguishing target section having a fire extinguishing gas reaching distance of 15 m or more, for example, and the space in the fire extinguishing target section reaches a predetermined extinguishing agent concentration uniformly in a short time. Let the fire extinguish.

  The jet head 300 and the silencer 302 constitute a fire extinguishing gas jet section 311. In such a fire extinguishing gas ejection unit 311, the fire extinguishing gas is supplied from the fire extinguishing gas supply source 315 to the ejection head 300 via the conduit 314. The conduit 314 includes a main pipe 323 connected to the fire extinguishing gas supply source 315, a branch pipe 318 interposed in the main pipe 323, and a branch pipe 319 connected to the branch pipe 318. A high-pressure fire extinguishing gas from the gas supply source 315 is guided to the ejection head 300. The conduit 314 is fastened to the base 316 and the bracket 321 by a fastener 322 such as a U-bolt, and is installed in the building frame in a state where vibration and displacement are suppressed.

  FIG. 18 is a perspective view showing the ejection head 300 and the silencer 302, and FIG. 19 is a cross-sectional view showing the ejection head 300 and the silencer 302. The jet head 300 is installed on the ceiling in order to release the fire extinguishing gas to the space in the fire extinguishing target section in the gas fire extinguishing apparatus using the fire extinguishing gas. The ejection head 300 includes an ejection head main body 301 and a nozzle member 339. A silencer 302 is attached to the ejection head body 301.

  In the ejection head 300, the ejection head main body 301 includes a base 337 and an outward flange 338 that continues to the base 337. The base portion 337 of the ejection head 300 is connected to the end portion 303 of the conduit 314 by a first screw 312 that is a taper screw so as to be attachable and detachable.

  The nozzle member 339 has a cylindrical portion 340 and an end wall 341. The tube portion 340 extends along an upper and lower axis L303 of the end portion 303 of the conduit 314. The cylindrical portion 340 is connected to a peripheral wall 342 in which a plurality of nozzle holes 304 are formed and one end portion in the axial direction of the peripheral wall 342 (upper side in FIG. 19), and can be attached to and detached from the base portion 337 of the ejection head body 301 with a second screw. And a base end portion 306 connected to the base. The end wall 341 closes the other axial end of the peripheral wall 342 (downward in FIG. 19). The nozzle hole 304 limits the flow rate of the fire extinguishing gas to a desired value.

The base end portion 306 of the nozzle member 339 is provided on the base portion 337 of the ejection head main body 301 so as to be detachable and replaceable. Various nozzle members 339 having different diameters of the nozzle holes 304 are individually selected and used depending on the length of the conduit 314 and the like. The reason is described. The gas fire extinguishing apparatus is designed to quickly fill the space in the fire extinguishing gas with the fire extinguishing gas while securing a large flow rate (for example, 20,000 to 100,000 liters / minute) necessary for fire extinguishing which is its original function. It is necessary to ensure that a high flow rate (for example, 100 m / s) is ensured and the fire extinguishing gas can be released. Therefore, the Fire Service Act enforcement regulations stipulate that the radiation pressure of the extinguishing agent gas from the nozzle hole 304 of the ejection head 300 in the gas fire extinguishing apparatus is 1.9 MPa or more, and in practice, 2 to 3 MPa (≈20 to 30 kgf) / Cm ² , yet higher (up to about 6 MPa≈60 kgf / cm ² ).

  Therefore, the diameter of the nozzle hole 304 of the injection head 300 is determined by the injection from the fire extinguishing gas supply source 315 so that the extinguishing agent gas injected from the nozzle hole 304 achieves the aforementioned large flow rate, high flow rate, and high radiation pressure. It must be set depending on the length of the conduit 314 to the installation location of the head 300, etc., and thus on the pipe resistance. For this reason, the diameter of the nozzle hole 304 varies depending on the length of the conduit 314 and the like. Therefore, for each installation location of the ejection head 300, various ejection heads 300 having different diameters of the nozzle holes 304 are individually selected and used. Must. Thus, in the gas fire extinguishing apparatus, various ejection heads 300 having different nozzle holes 304 are indispensable.

  The silencer 302 includes a silencer 308, a pressing member 328, and a mounting member 327. The sound deadening material 308 is made of a porous material through which gas can circulate, for example, a porous metal obtained by sintering fine metal powder or fine metal filaments, or, for example, by laminating a plurality of layers of wire mesh. It may be configured and may be made of a synthetic resin. For such a sound deadening material 308, porous materials with different gaps can be appropriately selected and used according to the flow conditions of the fire extinguishing gas such as the diameter, length, number, and formation position of the nozzle holes 304.

  The sound deadening material 308 is formed in a flat plate shape such as a circular plate, for example, and a plurality of sheets are laminated. The overall shape of the laminated sound deadening material 308 is, for example, a cylindrical shape. The end surface 320 on one side in the axial direction (upper side in FIG. 19) of the laminated sound deadening material 308 faces the lower surface in FIG. 19 of the outward flange 338 of the ejection head body 301, and is disposed and laminated, for example. The peripheral surface 324 of the sound deadening material 308 is open to the atmosphere. The silencer 308 is formed with an insertion hole 310 through which the cylindrical portion 340 of the nozzle member 339 is inserted.

  The pressing member 328 presses the end surface 325 on the other side (lower side in FIG. 19) of the laminated sound deadening material 308. The pressing member 328 has a flat plate shape and has a peripheral surface extending along the peripheral surface 324 of the sound deadening material 308.

  In this embodiment, the attachment member 327 is a bolt as a screw member, and is denoted by the same reference numeral. A plurality of (for example, six) bolts 327 are arranged at equal intervals around the axis L303. The shaft portion of the bolt 327 is inserted through a bolt insertion hole formed in each of the presser member 328 and the silencer 308, and the head of the bolt 327 is opposite to the silencer 308 of the presser member 328 (downward in FIG. 19). ). The male screw formed on the shaft portion of the bolt 327 is formed by opening a hole in the outward flange 338, so that the male screw is detachably screwed onto the screw. As a result, the bolt 327 holds the laminated sound deadening material 308 between the outward flange 338 and the pressing member 328 and fixes it.

  Each axis of the bolt 327 is parallel to the axis L303 of the end 303 of the conduit 314. The axes of the end 303 of the conduit 314, the ejection head 300, and the silencer 302 are on a straight line. The workability of connecting the base portion 337 of the ejection head main body 301 to the end portion 303 of the conduit 314 with the first screw 312 in a state where the silencer 302 is attached to the ejection head 300 is good.

  The axis L303 of the end 303 of the conduit 314 is aligned with the axes of the ejection head 300 including the ejection head main body 301 and the nozzle member 339, the muffler 308, and the pressing member 328. Therefore, the connection between the end 303 of the conduit 314 and the base 337 of the ejection head main body 301 by the first screw 312 and the connection by the second screw 307 between the base 337 of the ejection head main body 301 and the base end 306 of the nozzle member 339. The workability is good. This good connection workability often means that the ejection head 300 and the sound deadening means 302 are higher in the ceiling than the person who is a place where the movement of the person is not an obstacle in the fire extinguishing target section in the building. It is important in view of being connected to such places.

  At the time of fire extinguishing, the high-pressure fire extinguishing gas injected through the nozzle hole 304 gradually passes through the fine gap of the sound deadening material 308, that is, smoothly and smoothly passes and expands under reduced pressure, reducing the generation of sound. Suppressed and injected into the space in the fire extinguishing target compartment in the building. The fire extinguishing gas from the peripheral surface 324 of the sound deadening material 308 can be diffused uniformly and quickly over the entire space in the fire extinguishing target area by being sprayed radially in the vicinity of the ceiling. Therefore, quick fire extinguishing of the fire extinguishing target section can be achieved.

  The sound deadening material 308 can achieve a large acoustic reduction effect while reducing the size of the configuration.

  In the above-described embodiment, the silencer 302 having a complicated configuration compared to the ejection head 300 can be attached to and detached from various ejection heads 300 having different nozzle holes 304 by bolts 327. Thus, it can be used in common for various ejection heads 300. This sharing facilitates mass production of the silencer 302 and improves productivity.

  In addition, depending on whether or not there is a need for noise suppression in the fire extinguishing target section, individual selection and use can be easily performed. Simplification can be achieved. Furthermore, the silencer 302 removed from the fire extinguishing target section, which no longer needs to be silenced, can be attached to another fire extinguishing target section to be silenced and reused, which is economical and energy efficient. Is achieved.

  In another embodiment of the present invention, the ejection head 300 and the muffler 302 may be configured integrally, i.e., not removable. In this embodiment, the base 337 of the jet head main body 301 is provided at the end 303 of the conduit 314 so as to be detachable and replaceable by the first screw 312, and various jet heads 300 having different nozzle holes 304 are individually provided. You may make it select and use.

  Further, the ejection head 300 and the muffling means 302 are connected in advance by the second screw 307 and the mounting member 327 to form an assembly, and then the base 337 of the ejection head body 301 in this assembly is connected to the end of the conduit 314. The workability of connecting to the portion 303 with the first screw 312 is also good.

  Further, in order to make the existing fire extinguishing target section, in which the base 337 of the jet head body 301 is connected to the end 303 of the conduit 314 by the first screw 312, the fire extinguishing target section to be silenced, When the silencer 302 is connected to the orientation flange 338 by the attachment member 327, the connection workability is also good.

  A gap exists between the inner peripheral surface of the insertion hole 310 of the sound deadening material 308 and the outer peripheral surface of the cylindrical portion 340 of the nozzle member 339. When the fire extinguishing gas is ejected from the nozzle hole 304, fine foreign substances are stored and stored in the gap, so that the nozzle holes 304 can be prevented from being clogged by foreign substances, and noise caused by the clogging of foreign substances can be prevented. It is possible to prevent a decrease in flow rate during generation and discharge.

  Foreign substances are present in the conduit 314. For example, when the conduit is a plated pipe, the scale and slag by welding in the conduit 314, when the conduit is a plated pipe, stripped pieces of the plated layer in the plated pipe, rust, and the seal material used in the pipe joint Such as debris. Further, due to the decompression inside the ejection head 100 and the release of the extinguishing gas radially outward, the ejection reaction force acting on the conduit 14 from the ejection head 100 in the rearward direction (left side in FIG. 19) during the extinguishing gas, This can be reduced to about 1/9 of the prior art shown in FIG.

  In another embodiment of the present invention, the inner peripheral surface of the insertion hole 310 of the silencer 308 and the outer peripheral surface of the cylindrical portion 340 of the nozzle member 339 are in close contact with each other. It has been confirmed by the present inventor that the silencing effect is improved by this configuration. The experiment and its results are described below with reference to FIGS.

FIG. 20 is a cross-sectional view showing the injection nozzle 500 and the silencing means 502 and 502a that have been tested by the present inventors. In FIG. 20 (1), the fire extinguishing gas that is N ₂ gas from the conduit 514 is ejected from the nozzle hole 504 of the ejection head 500. Eleven silencers 508 are packed and housed in a right cylindrical housing 551 of the silencer 502 attached to the ejection head 500. The fire extinguishing gas that has passed through the sound deadening material 508 is discharged from the discharge hole 52 of the housing 551 into the space in the fire extinguishing target section. The sound deadening material 508 comes into close contact with the flat end surface of the outlet end of the nozzle hole 504 of the ejection head 500.

The supply pressure of the fire extinguishing gas supplied from the conduit 514 to the injection nozzle 500 is, for example, 3 MPa to 7 MPa, the discharge flow rate of the fire extinguishing gas is about 55 m ³ / min, and the flow rate of the fire extinguishing gas released from the nozzle hole 504 Is about 60-100 m / sec. The void ratio of the silencer 508 used in this experiment is about 97%, the diameter is about 130 mm, and the thickness is 10 mm / sheet.

  In FIG. 20 (2), the silencer 508 of the silencer 500a is disposed with a gap 553 of about 1 mm from the flat end surface of the outlet end of the nozzle hole 504 of the ejection head 500, and other configurations are shown in FIG. ).

  FIG. 21 is a diagram showing the time lapse of the sound pressure level obtained when the present inventor released fire extinguishing gas with the configuration of FIG. A line 554 is an experimental result obtained by a configuration in which the silencer 508 is brought into close contact with the flat end surface of the outlet end of the nozzle hole 504 as shown in FIG. 20 (1), and the line 555 is shown in FIG. 20 (2). It is an experimental result by a configuration in which the sound deadening material 508 is arranged with a gap 553 from the flat end surface of the outlet end of the nozzle hole 504 as described above.

  From these experimental results, according to the configuration in which the silencer 508 is in close contact with and in contact with the flat end surface of the outlet end of the nozzle hole 504 (FIG. 20 (1)), the configuration in which the gap 553 is disposed (FIG. 20). Compared with (2)), it was confirmed that a large silencing effect of about 12 dB was obtained. Therefore, according to the embodiment in which the inner peripheral surface of the insertion hole 310 of the silencer 308 and the outer peripheral surface of the cylindrical portion 340 of the nozzle member 339 are in close contact with each other, it is understood that the silencing effect is improved. It was.

  Accordingly, as in the embodiment of FIGS. 17 to 20, a gap 315 is provided between the end surface of the sound deadening material 308 facing the nozzle hole 304 and the end surface of the ejection head body 301 facing the sound deadening material 308. At this time, by setting the interval in the direction of the axis L303 within a range in which the silencing effect is not reduced, for example, 0.1 mm to 1.5 mm, the silencing material 308 is prevented from being clogged by foreign matters without substantially reducing the silencing effect. can do.

  The gas fire extinguishing apparatus of the present invention releases a fire extinguishing gas as a fire extinguishing agent into a space in a fire extinguishing target section of a building when a fire occurs, thereby sufficiently spreading the fire extinguishing gas even in a large fire extinguishing target fire extinguisher. Can be implemented over a wide range.

  A fire extinguishing gas jetting device that jets a high-pressure fire extinguishing gas toward a space in a fire extinguishing target section in a building, the fire extinguishing gas jetting device including an jet head 300 and discharge of the fire extinguishing gas from the jet head 300 The sound-absorbing means 302 is provided on the downstream side of the first silencing member and the silencing material 308 as the first silencing member provided on the ejection head 300 side. The first and second silencing members are each formed in a flat plate shape and are made of a porous material through which gas can flow. The first and second silencing members are stacked to form a cylindrical shape. The first and second silencing members have the same outer diameter. The first and second silencing members have the same thickness. The entire outer peripheral surfaces of the first and second silencing members are exposed to the atmosphere. A plate-like pressing member 328 for fixing the second silencing member is further provided.

  FIG. 22 is a perspective view showing a partial configuration including the ejection head 400 and the sound deadening means 402 of the gas fire extinguishing apparatus according to the embodiment of the present invention. The gas fire extinguishing apparatus of the present embodiment is provided on a wall in a fire extinguishing target section of a building, and the jet head 400 that jets a high-pressure fire extinguishing gas toward a space in the fire extinguishing target section is connected to the jet head 400. A conduit 14 for introducing a high-pressure fire extinguishing gas to the ejection head 400, a fire-extinguishing gas supply source 15 for supplying a high-pressure fire extinguishing gas to the conduit 14, and a nozzle hole 404 formed in the ejection head 400 (see FIG. 24 described later) And a silencer 402 for attenuating the sound generated due to the injection of the fire extinguishing gas injected from.

The fire extinguishing gas is realized by an incombustible gas such as N ₂ gas, CO ₂ gas, and halide gas. Such a fire extinguishing gas is sufficiently diffused even in a fire extinguishing target section having a fire extinguishing gas reaching distance of 15 m or more, for example, and the space in the fire extinguishing target section reaches a predetermined extinguishing agent concentration uniformly in a short time. Let the fire extinguish.

  The jet head 400 and the silencer 402 constitute a fire extinguishing gas jet unit 411. In such a fire extinguishing gas ejection unit 411, the fire extinguishing gas is supplied from the fire extinguishing gas supply source 15 to the ejection head 400 via the conduit 14. The conduit 14 includes a main pipe 23 connected to the fire extinguishing gas supply source 15, a branch pipe 18 interposed in the main pipe 23, and a branch pipe 19 connected to the branch pipe 18. A high-pressure fire extinguishing gas from the gas supply source 15 is guided to the ejection head 400. The conduit 14 is fastened to the base 20 and the bracket 21 by a fastener 22 such as a U-bolt, and is installed in a building frame in a state where vibration and displacement are suppressed.

  FIG. 23 is a perspective view showing the ejection head 400 and the silencing means 402, and FIG. 24 is a cross-sectional view showing the ejection head 400 and the silencing means 402. The ejection head 400 having a silencing function is installed on the wall in order to release the extinguishing gas to a fire extinguishing target section in a gas fire extinguishing facility that uses the extinguishing gas. Configured.

  The attachment auxiliary member 403 includes a base portion 405 and an outward flange 406 that is continuous with the base portion 405. The base 405 is detachably attached to the ejection head main body 401 by screws 407. A nozzle member 409 having a nozzle hole 404 that is a choke is attached to the attachment auxiliary member 403 by a screw 410 so as to be attachable and detachable. The nozzle hole 404 limits the flow rate of the fire extinguishing gas to a desired value.

  The silencer 402 is composed of a silencer 408 made of a porous material through which gas can flow. The silencer 408 is formed by laminating a plurality of members each having a thin disk shape and a thin annular shape. The overall shape of the laminated silencer 408 is substantially cylindrical. Such a sound deadening material 408 is appropriately selected from porous materials with different gaps depending on the flow conditions of the fire extinguishing gas, such as the diameter and length of the nozzle holes 404, the number of nozzle holes 404, and the formation position. Can be used.

  In the nozzle member 409, a gap 415 is formed between the end face of the outlet of the nozzle hole 404 and the sound deadening material 408 to hold and store foreign matter such as fine rust from the nozzle hole 404, thereby the sound deadening material 408. Prevent clogging by foreign objects.

  An end surface 420 on one side (the left side in FIGS. 24 and 25) of the sound deadening material 408 is disposed in contact with the annular mounting portion 422 of the guide member 421 so as to face the outward flange 406 of the mounting auxiliary member 403. . The guide member 421 includes the attachment portion 422, a short cylindrical guide portion 423 that continues to the attachment portion 422 and guides the fire extinguishing gas, and an expansion portion 443 described later.

  An end surface 425 on the other side (right side in FIGS. 24 and 25) of the silencer 408 is a ring-shaped presser that fixes the silencer 408 to the outward flange 406 of the attachment auxiliary member 403 via an attachment member 427 such as a bolt. Except for the part in contact with the member 428, it is open to the atmosphere. The shaft portion of the attachment member 427 is inserted into the holding member 428, the sound deadening material 408, and the attachment portion 422 of the guide member 421, and is screwed to the outward flange 406 of the attachment auxiliary member 403.

  The peripheral surface 424 of the sound deadening material 408 is closely attached to the short cylindrical shape of the guide portion 423 of the guide member 421, specifically, the cylindrical inner peripheral surface. The guide portion 423 is formed in a substantially frustoconical shape so that the expanding portion 443 expands outward in the radial direction as it moves away from the holding member 428 in the fire extinguishing gas injection direction.

  Since the guide member 421 has the widened portion 443, the fire extinguishing gas released from the end surface on the other side in the axial direction of the sound deadening material 408 diffuses radially outward with respect to the axis L403 of the ejection head 400. The fire extinguishing gas can be made to reach far and the required amount of fire extinguishing gas can be released into the fire extinguishing target section.

  As shown in FIG. 25, the mounting portion 422 of the guide member 421 is fitted into a mounting seat 431 formed in an annular recess in the outward flange 406 of the mounting auxiliary member 403, and is radially inward of the mounting seat 431. It protrudes from the end face 432 (below in FIG. 25) by a gap ΔL4.

  An end surface 420 on one side (the left side in FIGS. 24 and 25) of the sound deadening material 408 is disposed in contact with the annular mounting portion 422 of the guide member 421 so as to face the outward flange 406 of the mounting auxiliary member 403. The end surface 420 on one side (the left side in FIGS. 24 and 25) of the sound deadening material 408 has a clearance ΔL 4 with the end surface 432 of the outward flange 406 of the auxiliary mounting member 403, and is therefore disposed in contact with the ejection head main body 401. This is not a configuration.

  The attachment auxiliary member 403 includes a base portion 405 and an outward flange 406 that is continuous with the base portion 405. The base 405 is detachably attached to the ejection head main body 401 with a screw 407.

  The silencer 402 is composed of a silencer 408 made of a porous material through which gas can flow. The silencer 408 is formed by laminating a plurality of members each having a thin disk shape and a thin annular shape. The overall shape of the laminated silencer 408 is substantially cylindrical.

  A nozzle member 409 is attached to the attachment auxiliary member 403 with a screw 410. The nozzle member 409 has a nozzle hole 404 that is a choke.

  FIG. 25 is a partial enlarged cross-sectional view showing a state in which the guide member 421 is sandwiched between the attachment assisting member 403 and the silencer 408. An end surface 420 on one side (the left side in FIGS. 24 and 25) of the sound deadening material 408 is disposed in contact with the annular mounting portion 422 of the guide member 421 so as to face the outward flange 406 of the mounting auxiliary member 403. . The guide member 421 includes the attachment portion 422 and a short cylindrical guide portion 423 that continues to the attachment portion 422 and guides the fire extinguishing gas.

  The circumferential surface 424 and the end surface 425 on the other side (the right side in FIGS. 23 and 24) of the sound deadening material 408 are press members 428 that fix the sound deadening material 408 to the outward flange 406 of the mounting auxiliary member 403 via the mounting member 427. Except for the part that touches, it is open to the atmosphere. The shaft portion of the attachment member 427 is inserted into the holding member 428, the sound deadening material 408, and the attachment portion 422 of the guide member 421, and is screwed to the outward flange 406 of the attachment auxiliary member 403.

  As shown in FIG. 25, the mounting portion 422 of the guide member 421 is fitted into a mounting seat 431 formed in an annular recess in the outward flange 406 of the mounting auxiliary member 403, and is radially inward of the mounting seat 431. It projects in the axial direction from the end surface 432 (below in FIG. 25) by a gap ΔL1.

  Referring again to FIG. 24, in the ejection head 400, the ejection head main body 401 includes a substantially cylindrical base portion 437 and a hooking portion 438 that continues to the outer periphery of the base portion 437. The engagement portion 438 of the ejection head 400 is connected to the end portion 14a of the conduit 14 by a first screw 412 that is a taper screw so as to be detachable and replaceable.

  The attachment auxiliary member 403 is provided on the base 437 of the ejection head main body 401 so as to be attachable and detachable. Various ejection head main bodies 401 having different nozzle holes 404 are individually selected and used depending on the length of the conduit 14 and the like. The reason is described.

The gas fire extinguishing apparatus is designed to quickly fill the space in the fire extinguishing gas with the fire extinguishing gas while securing a large flow rate (for example, 20,000 to 100,000 liters / minute) necessary for fire extinguishing which is its original function. It is necessary to ensure that a high flow rate (for example, 100 m / s) is ensured and the fire extinguishing gas can be released. Therefore, the Fire Service Act enforcement regulations stipulate that the radiation pressure of the fire extinguishing gas from the nozzle hole 404 of the jet head 400 in the gas fire extinguishing apparatus is 1.9 MPa or more, and in practice, 2 to 3 MPa (≈20 to 30 kgf / cm ² , yet higher (up to about 6 MPa≈60 kgf / cm ² ).

  Therefore, the value of the diameter of the nozzle hole 404 of the ejection head 400 is such that the fire extinguishing gas ejected from the nozzle hole 404 achieves the aforementioned large flow rate, high flow rate, and high radiation pressure from the fire extinguishing gas supply source 15. Depending on the length of the conduit 14 up to 400 installation locations and thus on the pipe resistance, it must be set.

  For this reason, the diameter of the nozzle hole 404 varies depending on the length of the conduit 14 and the like. Therefore, for each installation location of the ejection head 400, various ejection heads 400 having different diameters of the nozzle holes 404 are individually selected and used. Must. Thus, in the gas fire extinguishing apparatus, various ejection heads 400 having different nozzle holes 404 are indispensable.

  The silencer 402 includes a plurality of silencers 408, a pressing member 428 and an attachment member 427. The sound deadening material 408 is made of a porous material through which a gas can circulate, for example, made of a porous metal obtained by sintering fine metal powder or fine metal filaments, etc. A sound deadening effect can be effectively realized without reducing the flow rate by decompression and expansion, and the sound deadening material 408 may be composed of, for example, a plurality of layers of wire mesh, and is made of a synthetic resin fiber. It may be a shaped molding or a porous member.

  The silencer 408 is formed in a flat plate shape such as a circular plate, for example, and a plurality of sheets are laminated. Each of the overall shape of the laminated silencer 408 is, for example, cylindrical. The circumferential surface 424 of the laminated sound deadening material 408 is tightly surrounded by the cylindrical inner circumferential surface of the guide portion 423 of the guide member 421 and is therefore not open to the atmosphere.

  The pressing member 428 presses the end surface 425 on the other side (right side in FIG. 24) of the laminated silencer 408. The pressing member 428 has a flat plate shape and has a peripheral surface 426 extending along the peripheral surface 424 of the sound deadening material 408.

  In this embodiment, the attachment member 427 is a bolt as a screw member, and is denoted by the same reference numeral. A plurality of (for example, six) mounting members 427 are arranged around the axis L403 at equal intervals. The shaft portion of the mounting member 427 is inserted through bolt insertion holes formed in the pressing member 428 and the sound deadening material 408, respectively, and the head of the mounting member 427 is opposite to the sound deadening material 408 of the pressing member 428 (FIG. 24). To the right).

  The external thread formed on the shaft portion of the attachment member 427 is formed by opening a hole in the outward flange 406 of the attachment assisting member 403, so that the external thread is removably screwed onto the screw. As a result, the mounting member 427 holds and fixes the laminated sound deadening material 408 between the mounting auxiliary member 403 and the pressing member 428, and thus between the ejection head main body 401 and the pressing member 428.

  Each axis of the mounting member 427 is parallel to the axis L403 of the end 14a of the conduit 14. The axes of the end 14a of the conduit 14, the ejection head 400, and the silencer 402 are in a straight line. The workability of connecting the base portion 437 of the ejection head main body 401 to the end portion 14a of the conduit 14 with the first screw 412 in a state where the silencer 402 is attached to the ejection head 400 is good.

  The axis L403 of the end portion 14a of the conduit 14 is aligned with the axes of the ejection head 400 including the ejection head main body 401, the silencer 408, and the pressing member 428. Therefore, the workability of the connection by the first screw 412 between the end portion 14 a of the conduit 14 and the base 437 of the ejection head main body 401 and the connection by the second screw 407 between the base 437 of the ejection head main body 401 and the mounting auxiliary member 403 is improved. Is good. The good connection workability means that in many cases, the ejection head 400 and the sound deadening means 402 are higher in the ceiling than the person who is a place that does not obstruct the movement of people in the fire extinguishing target section in the building. It is important in view of being connected to such places.

  At the time of fire extinguishing, the high pressure fire extinguishing gas injected through the nozzle hole 404 passes through the fine gaps of the sound deadening material 408, and gradually, smoothly and smoothly passes and expands under reduced pressure, reducing the generation of sound. Suppressed and injected into the space in the fire extinguishing target compartment in the building. The fire extinguishing gas from the peripheral surface 424 of the sound deadening material 408 can be diffused uniformly and quickly over the entire space in the fire extinguishing target section by being radially ejected horizontally near the ceiling. Therefore, quick fire extinguishing of the fire extinguishing target section can be achieved.

  The sound deadening material 408 can achieve a large acoustic reduction effect while reducing the size of the configuration.

  In the above-described embodiment, the silencing means 402 having a complicated configuration compared to the ejection head 400 can be attached to and detached from various ejection heads 400 having different nozzle holes 404 by the mounting member 427, and therefore the silencing material 408. Can be used in common for various ejection heads 400. This sharing facilitates mass production of the sound deadening material 408 and improves productivity.

  In addition, depending on whether or not there is a need for noise suppression in the fire extinguishing target section, individual selection and use can be easily performed. Simplification can be achieved. Furthermore, the silencer 402 removed from the fire extinguishing target section that no longer needs to be silenced can be attached to another fire extinguishing target section to be silenced and reused, which is economical and saves energy. Is achieved.

  In other embodiments of the present invention, the ejection head 400 and the muffler 402 may be configured integrally, i.e., not removable. In this embodiment, the base 437 of the jet head main body 401 is provided at the end 14a of the conduit 14 so as to be detachable and replaceable by the first screw 412, and various types of jet heads 400 having different nozzle holes 404 have different diameters. It may be selected and used.

  The silencer 402 and the ejection head 400 are connected in advance by the second screw 407 and the mounting member 427 to form an assembly, and then the base 437 of the ejection head main body 401 in this assembly is connected to the end of the conduit 14. The workability of connecting the first screw 412 to 14a is also good.

  Furthermore, in order to make the existing fire extinguishing target section where the base portion 437 of the jet head main body 401 is connected to the end portion 14a of the conduit 14 by the first screw 412 into the fire extinguishing target section to be silenced, When the silencer 402 is connected by the attachment member 427, the workability of the connection is also good.

  A gap 415 exists between the end face of the sound deadening material 408 facing the nozzle hole 404 and the end face of the nozzle member 409 facing the sound deadening material 408. When the fire extinguishing gas is injected from the nozzle hole 404, fine foreign substances are stored and stored in the gap 415, so that the silencing material 408 can be prevented from being clogged by foreign substances, and noise caused by the clogging of foreign substances can be prevented. It is possible to prevent a decrease in flow rate during the generation and release of water.

  The foreign matter exists in the conduit 14, for example, a scale and slag due to welding in the conduit 14, and when the conduit is a plated pipe, a stripped piece of a plating layer in the plated pipe, rust, and a seal material used in a pipe joint. Such as debris. Further, due to the decompression inside the ejection head 400 and the release of the extinguishing gas radially outward, the ejection reaction force acting in the backward direction (left side in FIG. 24) from the ejection head 400 to the conduit 14 at the time of fire extinguishing gas injection, This can be reduced by about 1/9 of the conventional technique shown in FIG.

  In another embodiment of the present invention, the sound deadening of the ejection head 700 in which the end face disposed on the nozzle hole 404 side of the sound deadening material 408 in the above embodiment, the ejection head main body 401 and the mounting auxiliary member 403 are integrated. It has been confirmed by the present inventor that the silencing effect does not decrease even when the gap between the end face disposed facing the material 408 is separated. The experiment and its results are described below with reference to FIGS.

FIG. 26 is a cross-sectional view showing the ejection head 700 and the silencing means 701 and 701a that have been tested by the present inventor. FIG. 27 is obtained when the present inventor releases a fire extinguishing gas with the configuration of FIG. It is a figure which shows the time passage of the sound pressure level given. In FIG. 26 (1), the fire extinguishing gas that is N ₂ gas from the conduit 714 is ejected from the nozzle hole 704 of the ejection head 700.

  Three sound deadening materials 706 are stacked and disposed on the downstream side (right side in FIG. 26) of the fire extinguishing gas discharge direction of the nozzle member 703 attached to the ejection head 700. The fire extinguishing gas passes through the nozzle hole 704 of the nozzle member 703, flows into the sound deadening material 706, and is discharged from the other end surface 709 in the axial direction of the sound deadening material 706 from the discharge hole 752 of the pressing member 728 to the space in the fire extinguishing target section. Is done. The sound deadening material 706 is in close contact with and in contact with the flat end surface of the outlet end of the nozzle hole 704 of the nozzle member 703.

The supply pressure of the extinguishing gas supplied from the conduit 714 to the ejection head 700 is, for example, 3 MPa to 7 MPa, the discharge flow rate of the extinguishing gas is about 55 m ³ / min, and the flow rate of the extinguishing gas discharged from the nozzle hole 704 Is about 60-100 m / sec. The void ratio of the sound deadening material 706 used in this experiment is about 97%, the diameter is about 130 mm, and the thickness is 10 mm / sheet.

  In FIG. 26 (2), the silencer 706 of the silencer 701a is disposed with a gap 753 of about 1 mm in the axial direction from the flat end surface of the outlet end of the nozzle hole 704 of the nozzle member 703, and the other configuration is as follows. This is the same as FIG.

  FIG. 27 is a diagram showing the time lapse of the sound pressure level obtained when the present inventor released fire extinguishing gas with the configuration of FIG. The line 754 is an experimental result obtained by a configuration in which the sound deadening material 706 is brought into close contact with the flat end surface of the outlet end of the nozzle hole 704 as shown in FIG. 26 (1), and the line 755 is shown in FIG. It is the experimental result by the structure which arranged the sound deadening material 705 so that the gap | interval 753 might be opened from the flat end surface of the exit end of the nozzle hole 704. FIG.

  From these experimental results, according to the configuration in which the sound deadening material 706 is in close contact with the flat end surface of the outlet end of the nozzle hole 704 (FIG. 26 (1)), the configuration in which the gap 753 is disposed (FIG. 26). Compared with (2)), it was confirmed that there was almost no difference in the silencing effect. Therefore, it has been confirmed that the silencing effect is not reduced even if a gap 753 is provided between the end surface of the silencer 706 facing the nozzle hole 704 and the end surface of the ejection head 700 facing the silencer 706.

  By providing such a gap 753 between the end face of the sound deadening material 706 facing the nozzle hole 704 and the end face of the ejection head 700 facing the sound deadening material 706, fine foreign matter can be obtained without reducing the sound deadening effect. When the extinguishing gas is stored and stored in the gap 753 and the fire extinguishing gas is injected from the nozzle hole 704, it is possible to prevent clogging of the sound deadening material 706 by foreign matter and to prevent generation of noise due to clogging of foreign matter. Foreign matter is present in the conduit 14, for example, a scale and slag formed by welding in the conduit 14, and when the conduit 14 is a plated tube, a stripped piece of a plated layer in the plated tube, rust, and a sealing material used in a pipe joint Such as debris.

  Therefore, as in the embodiment of FIGS. 22 to 26, a gap 415 is provided between the end surface of the sound deadening material 408 facing the nozzle hole 404 and the end surface of the ejection head body 401 facing the sound deadening material 408. At this time, by setting the interval ΔL2 in the direction of the axis L403 in a range in which the silencing effect is not reduced, for example, 0.1 mm to 1.5 mm, the silencing material 408 is clogged with foreign matters without substantially reducing the silencing effect. Can be prevented.

FIG. 28 is a cross-sectional view showing the ejection head 500 and the silencing means 502 and 502a that have been tested by the present inventors. In FIG. 28 (1), the fire extinguishing gas that is N ₂ gas from the conduit 514 is ejected from the nozzle hole 504 of the ejection head 500.

  Eleven silencers 508 are stacked and housed in a right cylindrical housing 551 of the silencer 502 attached to the ejection head 500. The fire extinguishing gas that has passed through the sound deadening material 508 is discharged from the discharge hole 552 of the housing 551 into the space in the fire extinguishing target section. The sound deadening material 508 comes into close contact with the flat end surface of the outlet end of the nozzle hole 504 of the ejection head 500.

The supply pressure of the fire extinguishing gas supplied from the conduit 514 to the ejection head 500 is, for example, 3 MPa to 7 MPa, the discharge flow rate of the fire extinguishing gas is about 55 m ³ / min, and the flow rate of the fire extinguishing gas discharged from the nozzle hole 504 Is about 60-100 m / sec. The void ratio of the silencer 508 used in this experiment is about 97%, the diameter is about 130 mm, and the thickness is 10 mm / sheet.

  In FIG. 28 (2), the silencer 508 of the silencer 502a is disposed with a gap 553 of about 1 mm from the flat end surface of the outlet end of the nozzle hole 504 of the ejection head 500, and other configurations are shown in FIG. Same as 1).

  FIG. 29 is a diagram showing the time lapse of the sound pressure level obtained when the present inventor released fire extinguishing gas with the configuration of FIG. The line 554 is an experimental result obtained by a configuration in which the silencer 508 is brought into close contact with the flat end surface of the outlet end of the nozzle hole 504 as shown in FIG. 28 (1), and the line 555 is shown in FIG. 28 (2). As described above, it is an experimental result by a configuration in which the sound deadening material 508 is disposed with a gap 553 from the flat end face of the outlet end of the nozzle hole 504.

  From these experimental results, according to the configuration in which the silencer 508 is in close contact with and in contact with the flat end surface of the outlet end of the nozzle hole 504 (FIG. 28 (1)), the configuration in which the gap 553 is disposed (FIG. 28). Compared to (2)), it was confirmed that a large silencing effect of about 16 dB was obtained. Therefore, according to the embodiment in which the end surface facing the nozzle hole 504 of the silencer 508 and the end surface facing the silencer 508 of the ejection head 500 are in close contact with each other, it is confirmed that the silencing effect is improved. It was done.

  FIG. 30 is a cross-sectional view showing a gas fire extinguisher according to another embodiment of the present invention. In the sound extinguishing means 600 of this gas fire extinguishing apparatus, the above-described guide member 421 is omitted. The function of the guide member 421 will be described with reference to FIG.

  The fire extinguishing gas from the plurality of nozzle holes 609 formed uniformly distributed over the entire surface of the flat nozzle portion 608 of the ejection head body 601 is ejected along mutually parallel axes of the nozzle holes 609, It gradually passes through the fine gaps of the silencer 613 and the silencer 610 disposed downstream of the nozzle hole 609, that is, smoothly and smoothly, and expands under reduced pressure. Each axis of the ejection head main body 601 and the sound deadening material 613 is on a straight line. The fine air gaps of the sound deadening material 613 give pressure loss to the fire extinguishing gas passing through them.

  Assuming that the path of the fire extinguishing gas jetted from each nozzle hole 609 of the jet head main body 601 into the silencer 613 is assumed to be a straight line for simplification, the overall shape of the silencer 613 is almost a right circular cylinder. The path length to the most downstream end face is indicated by reference numeral L601 in FIG.

  The path length from the side of the ejection head main body 601 to the peripheral surface 614 of the sound deadening material 613 is indicated by a reference symbol L602 in FIG. In order to increase the flow rate of the fire extinguishing gas ejected from the nozzle hole 609, when the outer diameter of the ejection head main body 601 is configured to be relatively larger than the length of the sound deadening material 613 in the axial direction, L601> L602.

  The pressure loss acting on the fire extinguishing gas is proportional to these path lengths L601 and L602. Therefore, the distribution of the pressure loss in the sound deadening material 613 is as shown by the isobaric line 603 connecting the positions where the same pressure loss occurs. The pressure loss is the largest in the region on the axis of the sound deadening material 613, and becomes smaller as the region goes farther away from the axis.

  Since the fire extinguishing gas ejected from the nozzle hole 609 is likely to flow through a region where the pressure loss is small, the fire extinguishing gas in the sound deadening material 613 is indicated by an imaginary reference numeral 604 in the axial direction of the ejection head body 601. And proceed sideways as indicated by reference numeral 605 and further in the backward direction as indicated by reference numeral 606. The lengths of the reference numerals 604, 605, and 606 are shown corresponding to the flow rate of the fire extinguishing gas, and a relatively large flow rate of the fire extinguishing gas flows in the side and back directions.

  In order to quickly fill the fire extinguishing target section with the fire extinguishing gas, a virtual line is formed along the axial direction of the ejection head main body 601 from the muffler installed near the wall surface (left side in FIG. 30) among the plurality of mufflers 610. Inject in the direction indicated by reference numeral 604 and laterally in the direction indicated by reference numeral 605 at as high a flow rate as possible to suppress the flow rate of the fire extinguishing gas traveling in the backward direction as indicated by reference numeral 606. There must be.

  In each of the embodiments described above with reference to FIGS. 22 to 29 of the present invention, the guide member 421 is a fire extinguishing gas that travels in the direction 606 behind FIG. And is advanced in the axial direction 604 and the side 605 of the ejection head main body 601 of the ejection head. As a result, for example, even in a large fire extinguishing target section having a fire extinguishing gas reach distance of 15 m or more, the fire extinguishing gas is sufficiently diffused so that the space in the fire extinguishing target section is uniformly and quickly set to a predetermined extinguishing agent concentration. Let it reach and be extinguished.

  The gas fire extinguishing apparatus of the present invention releases a fire extinguishing gas as a fire extinguishing agent into a space in a fire extinguishing target section of a building when a fire occurs, thereby sufficiently spreading the fire extinguishing gas even in a large fire extinguishing target fire extinguisher. Can be implemented over a wide range.

  A fire extinguishing gas jetting apparatus that jets a high-pressure fire extinguishing gas toward a space in a fire extinguishing target section in a building, the fire extinguishing gas jetting apparatus including an ejection head 400 and discharge of the fire extinguishing gas from the ejection head 400 And a silencer 402 for attenuating the sound caused by the noise. The silencer 402 is provided on the ejection head 400 side as a first silencer 408 and a downstream side of the first silencer. The first and second silencing members are each formed in a flat plate shape and are made of a porous material through which gas can flow. The first and second silencing members are stacked to form a cylindrical shape. The first and second silencing members have the same outer diameter. The first and second silencing members have the same thickness. The entire outer peripheral surfaces of the first and second silencing members are exposed to the atmosphere. A plate-like pressing member 428 for fixing the second silencing member is further provided.

(Appendix 1 invention)
Appendix 1 The invention
(A) an ejection head 100 having a nozzle hole 104 that ejects a high-pressure fire extinguishing gas toward a space in a fire extinguishing target section in a building;
(B) a conduit 14 having an end portion 14a to which the ejection head 100 is connected, and guiding high-pressure fire extinguishing gas to the ejection head 100;
(C) a fire extinguishing gas supply source 15 for supplying a high pressure fire extinguishing gas to the conduit 14;
(D) a gas fire extinguishing device provided on the ejection head 100 and including a sound extinguishing means 102 for attenuating sound caused by the discharge of the fire extinguishing gas from the nozzle hole 104,
(E) The ejection head 100 is
(E1) an ejection head body 101 connected to the end 14a of the conduit 14,
(E2) an attachment auxiliary member 103 detachably attached to the ejection head main body 101;
(F) The silencer 102
(F1) A rectifying member 109 having a rectifying hole 112 and detachably provided on the attachment auxiliary member 103 so as to cover the nozzle hole 104 of the ejection head main body 101;
(F2) a first sound deadening material 113 formed in a flat plate shape, made of a porous material through which gas can flow, and disposed in a plurality of layers between the rectifying member 109 and the ejection head body; ,
(F3) It is formed of a porous material that is formed in a flat plate shape and is capable of flowing gas, and has a second silencer 108 disposed on the rectifying member 109 by stacking a plurality of sheets in the discharge direction of the fire extinguishing gas. This is a gas fire extinguishing apparatus.

  According to Supplementary Note 1 of the Invention, the high-pressure fire extinguishing gas supplied from the fire extinguishing gas supply source 15 to the conduit 14 is jetted toward the space in the building via the jet head 100. Such a jet head 100 is provided with a sound deadening means 102, and it is possible to prevent generation of a loud jet sound due to a jet flow of fire extinguishing gas jetted from the nozzle hole 104 of the jet head 100 at a high speed.

  The fire extinguishing gas flows from the conduit 14 through the nozzle hole 104 of the ejection head 100, the first silencer 113 and the rectifying member 109 into the second silencer 108, and passes through the fine gap of the second silencer 108. It expands under reduced pressure and is injected into the space in the fire extinguishing target compartment in the building.

  With regard to a large acoustic reduction effect due to the small configuration, at the time of fire extinguishing, the high-pressure fire extinguishing gas injected through the nozzle hole 104 expands under reduced pressure by passing through a fine gap of the first sound deadening material 113, and the rectifying member After being rectified through 109 rectifying holes 112, it flows into the second sound deadening material 108 and further expands under reduced pressure, and thus the pressure is gradually and smoothly expanded without reducing the flow rate of the fire extinguishing gas, so that the generation of sound is effective. To be suppressed. Thus, a large acoustic reduction effect can be achieved while downsizing the configuration.

  Each of the plurality of first and second silencers 113 and 108 is made of a porous material through which gas can flow, is formed into a flat plate shape, and is laminated and assembled. Therefore, by selecting the number of stacks according to the flow rate of fire extinguishing gas injected into the space within the fire extinguishing target area, the pressure, and the degree of need for noise suppression, the desired characteristics of various injections and noise suppression can be accurately determined. It is easy to adjust and obtain. Moreover, what is necessary is just to manufacture the 1st and 2nd silencer 113,108 which has the same dimension shape, mass production is easy, and productivity is improved.

  Supplementary Note 1 The invention is characterized in that a gap 115 exists between an end surface of the first silencer 113 facing the nozzle hole 104 and an end surface of the ejection head 100 facing the first silencer 113. And

  According to the invention of Supplementary Note 1, since the gap 115 is provided between the end surface of the first silencer 113 facing the nozzle hole 104 and the end surface of the ejection head facing the first silencer 113, the foreign matter Is stored in and stored in the gap 115, so that when the fire extinguishing gas is injected from the nozzle hole 104, the first and second sound deadening materials 113 and 108 are prevented from being clogged by foreign matter, and noise caused by clogging of foreign matter is prevented. Generation and flow reduction are prevented. Foreign matter is present in the conduit 14, for example, a scale and slag formed by welding in the conduit 14, and when the conduit 14 is a plated tube, a stripped piece of a plated layer in the plated tube, rust, and a sealing material used in a pipe joint Such as debris.

  Supplementary Note 1 The invention is characterized in that the peripheral surface 124 of the laminated second silencer 108 is open to the atmosphere.

  According to the invention of Supplementary Note 1, since the peripheral surface 124 of the second sound deadening material 108 is open to the atmosphere, the discharge area of the fire extinguishing gas is large. The required flow rate and flow velocity can be ensured without increasing the cross-sectional area of the flow path, and the configuration can be further miniaturized.

(Appendix 1 Effect of Invention)
According to the supplementary note 1 invention, since the sound deadening means 102 is provided in the ejection head 100, it is possible to prevent a large ejection sound from being generated even when a high pressure fire extinguishing gas is ejected from the ejection head 100 when a fire occurs. . Each of the plurality of first and second silencers 113 and 108 is made of a porous material through which gas can flow, is formed into a flat plate shape, and is laminated and assembled. Therefore, by selecting the number of stacks according to the flow rate of fire extinguishing gas injected into the space within the fire extinguishing target area, the pressure, and the degree of need for noise suppression, the desired characteristics of various injections and noise suppression can be accurately determined. It is easy to adjust and obtain. Moreover, what is necessary is just to manufacture the 1st and 2nd silencer 113,108 which has the same dimension shape, mass production is easy, and productivity is improved.

  According to the supplementary note 1, the gap 115 is provided between the end surface of the first silencer 113 facing the nozzle hole 104 and the end surface of the ejection head 100 facing the second silencer 108. When the fine foreign matter is stored and stored in the gap 115 and the fire extinguishing gas is injected from the nozzle hole 104, the first and second silencing materials 113 and 108 are prevented from being clogged by the foreign matter, and the foreign matter is clogged. The generation of noise due to the above can be prevented, and a decrease in the flow rate due to clogging during fire-extinguishing gas injection can be prevented.

  Further, according to the invention of Supplementary Note 1, since the peripheral surface 124 of the second sound deadening material 108 is opened to the atmosphere, a decrease in the flow rate of the fire extinguishing gas is suppressed, and the flow passage cross-sectional area for gas release is not increased. The required flow rate and flow velocity are ensured, and the injection of the fire extinguishing gas is not hindered by an obstacle or the like. Therefore, the small configuration can prevent the generation of a large injection sound.

(Appendix 2 invention)
Appendix 2 The invention
(A) an injection head 200 having a nozzle hole 204 for injecting a high-pressure fire extinguishing gas toward a space in a fire extinguishing target section in a building;
(B) a conduit 14 having an end 14a to which the ejection head 200 is connected, and guiding a high-pressure fire extinguishing gas to the ejection head 200;
(C) a fire extinguishing gas supply source 15 for supplying a high pressure fire extinguishing gas to the conduit 14;
(D) a gas fire extinguishing device provided on the ejection head 200 and including a sound extinguishing means 202 for attenuating sound due to the discharge of the fire extinguishing gas from the nozzle hole 204,
(E) The ejection head 200 is
(E1) an ejection head body 201 connected to the end portion 14a of the conduit 14;
(E2) a nozzle member 234,
(E2-1) a cylindrical portion 240 extending along the axis of the end portion 14a of the conduit 14 and having one end in the axial direction connected to the ejection head body 201;
(E2-2) a nozzle member 234 that is connected to the other axial end of the cylindrical portion 240, has a nozzle hole 204, and has an end wall 241 that closes the other axial end of the cylindrical portion 240;
(F) The silencer 202 is
(F1) The sound deadening material 208, which is formed in a flat plate shape, is made of a porous material through which gas can flow, is laminated, and an end face 220 on one side in the axial direction of the laminated sound deadening material 208. Is a silencer 208 disposed facing the ejection head body 201,
(F2) a holding member 228 that holds the end surface 225 on the other side in the axial direction of the laminated sound deadening material 208;
(F3) A gas fire extinguishing apparatus including an attachment member 227 that sandwiches and fixes the silencer 208 between the ejection head main body 201 and the pressing member 228.

  According to Supplementary Note 2, the high-pressure fire extinguishing gas supplied to the conduit 14 from the fire extinguishing gas supply source 15 is jetted toward the space in the building through the jet head 200. Such an ejection head 200 is provided with a silencer 202 and can prevent generation of a large ejection sound due to the fire-extinguishing gas jet flow ejected from the nozzle hole 204 of the ejection head 200 at a high speed.

  The fire extinguishing gas flows from the conduit 14 through the nozzle hole 204 of the jet head 200 into the silencer 208, passes through a fine gap of the silencer 208 and expands under reduced pressure, and is jetted into the space within the fire extinguishing target section in the building. Is done.

  Regarding the large sound reduction effect by the small configuration, the high-pressure fire extinguishing gas injected through the nozzle hole 204 at the time of fire extinguishing is decompressed and expanded by passing through the fine gap of the sound deadening material 208, and thus the fire extinguishing gas Generation of sound is effectively suppressed by gradually and smoothly decompressing and expanding without reducing the flow rate. Thus, a large acoustic reduction effect can be achieved while downsizing the configuration.

  The plurality of silencers 208 are made of a porous material through which gas can flow, are formed into a flat plate shape, and are laminated and assembled. Therefore, by selecting the number of stacks according to the flow rate of fire extinguishing gas injected into the space within the fire extinguishing target area, the pressure, and the degree of need for noise suppression, the desired characteristics of various injections and noise suppression can be accurately determined. It is easy to adjust and obtain. Further, the muffler 208 having the same size and shape may be manufactured, mass production is easy, and productivity is improved.

  Supplementary Note 2 The invention is characterized in that a gap 215 exists between an end surface 220 of the sound deadening material 208 facing the nozzle hole 204 and an end surface 232 of the ejection head main body 201 facing the sound deadening material 208. To do.

  According to the second aspect of the invention, since the gap 215 is provided between the end surface of the muffling material 208 facing the nozzle hole 204 and the end surface of the ejection head facing the muffling material 208, the foreign matter enters the gap 215. When the fire extinguishing gas stored and stored is injected from the nozzle hole 204, the silencing material 208 is prevented from being clogged by foreign matter, and generation of noise and flow rate reduction due to clogging of foreign matter are prevented. Foreign matter is present in the conduit 14, for example, a scale and slag formed by welding in the conduit 14, and when the conduit 14 is a plated tube, a stripped piece of a plated layer in the plated tube, rust, and a sealing material used in a pipe joint Such as debris.

  Supplementary Note 2 The invention is characterized in that the peripheral surface 224 of the laminated sound deadening material 208 is open to the atmosphere.

  According to the second aspect of the invention, since the peripheral surface 224 of the sound deadening material 208 is open to the atmosphere, the fire extinguishing gas discharge area is large, thereby suppressing a decrease in the flow rate of the extinguishing gas, and a flow path for gas discharge The required flow rate and flow velocity can be ensured without increasing the cross-sectional area, and the configuration can be further miniaturized.

(Appendix 2 Effect of Invention)
According to the supplementary note 2 invention, since the sound deadening means 202 is provided in the ejection head 200, it is possible to prevent a large ejection sound from being generated even if a high pressure fire extinguishing gas is ejected from the ejection head 200 when a fire occurs. . The plurality of silencers 208 are made of a porous material through which gas can flow, are formed into flat plate shapes, and are stacked and assembled. Therefore, by selecting the number of stacks according to the flow rate of fire extinguishing gas injected into the space within the fire extinguishing target area, the pressure, and the degree of need for noise suppression, the desired characteristics of various injections and noise suppression can be accurately determined. It is easy to adjust and obtain. Further, the muffler 208 having the same size and shape may be manufactured, mass production is easy, and productivity is improved.

  Further, according to the second aspect of the invention, since the gap 215 is provided between the end surface of the muffler 208 facing the nozzle hole 204 and the end surface of the ejection head facing the muffler 208, fine foreign matter When the fire extinguishing gas is stored and stored in the gap 215 and the fire extinguishing gas is injected from the nozzle hole 204, the silencing material 208 is prevented from being clogged by the foreign matter, and the generation of noise due to the clogging of the foreign matter is prevented and the fire extinguishing gas is injected. It is possible to prevent a decrease in flow rate due to clogging at the time.

  According to the supplementary note 2 invention, since the peripheral surface 224 of the sound deadening material 208 is opened to the atmosphere, a decrease in the flow rate of the fire extinguishing gas is suppressed, and the required cross-sectional area for gas discharge is not increased. A flow rate and a flow rate are ensured, and the injection of the fire extinguishing gas is not hindered by an obstacle or the like, and therefore, a small configuration can prevent a large injection sound from being generated.

(Appendix 3 invention)
Appendix 3 The invention
(A) an ejection head 300 having a nozzle hole 304 that ejects a high-pressure fire extinguishing gas toward a space in a fire extinguishing target section in a building;
(B) a conduit 314 having an end 303 to which the ejection head 300 is connected, and leading high-pressure fire extinguishing gas to the ejection head 300;
(C) a fire extinguishing gas supply source 315 for supplying a high pressure fire extinguishing gas to the conduit 314;
(D) a gas fire extinguishing device provided on the ejection head 300 and including a sound extinguishing means 302 for attenuating sound caused by the discharge of the fire extinguishing gas from the nozzle hole 304,
(E) The ejection head 300 is
(E1) The ejection head body 301,
A base 337 connected to the end 303 of the conduit 314;
An ejection head body 301 having an outward flange 338 continuous with a base 337;
(E2) a nozzle member 339,
(E2-1) A cylindrical portion 340 extending along the axis L303 of the end portion 303 of the conduit 314, and is connected to a peripheral wall 342 in which a plurality of nozzle holes 304 are formed, and one end portion in the axial direction of the peripheral wall 342. A tube portion 340 having a base end portion 306 connected to the base portion 337 of the head main body 301;
(E2-2) a nozzle member 339 having an end wall 341 that closes the other axial end of the peripheral wall 342,
(F) The silencer 302
(F1) The silencing material 308, each silencing material 308 is formed in a flat plate shape, a plurality of layers are made of a porous material through which gas can flow, and the insertion hole 310 through which the cylindrical portion 340 is inserted. The end surface 320 on one side in the axial direction (upper side in FIG. 19) of the laminated sound deadening material 308 is disposed on the outward flange 338 side of the ejection head main body 301, and the circumferential surface 324 of the laminated sound deadening material 308. Is a silencer 308 that is open to the atmosphere,
(F2) a pressing member 328 that presses the end surface 325 on the other side (lower side in FIG. 19) of the laminated sound deadening material 308;
(F3) A gas fire extinguishing apparatus including an attachment member 327 that sandwiches and fixes the silencer 308 between the outward flange 338 and the pressing member 328.

  According to the third aspect of the invention, the high-pressure fire extinguishing gas supplied from the fire extinguishing gas supply source 315 to the conduit 314 is jetted toward the space in the building via the jet head 300. Such a jet head 300 is provided with a sound deadening means 302 and can prevent generation of a loud jet sound due to a jet flow of fire extinguishing gas jetted from the nozzle hole 304 of the jet head 300 at a high speed.

  The fire extinguishing gas is decompressed and expanded from the conduit 314, through the nozzle hole 304 formed in the cylindrical portion 340 of the ejection head 300, through the fine gap of the sound extinguishing material 308, and the space in the fire extinguishing target section in the building. Is injected into.

  Regarding the large sound reduction effect by the small configuration, the high pressure fire extinguishing gas injected through the nozzle hole 304 at the time of fire extinguishing passes through the fine gap of the silencer 308, so that the fine gap of the silencer 308. Thus, the generation of sound is reduced and suppressed by gradually expanding, ie, smoothly and smoothly, under reduced pressure. Thus, a large acoustic reduction effect can be achieved while downsizing the configuration. Since the peripheral surface 324 of the silencer 308 is open to the atmosphere, the configuration is further miniaturized.

  Each of the plurality of silencers 308 is made of a porous material through which gas can flow, is formed into a flat plate shape, and is laminated and assembled. Therefore, by selecting the number of stacks according to the flow rate of fire extinguishing gas injected into the space within the fire extinguishing target area, the pressure, and the degree of need for noise suppression, the desired characteristics of various injections and noise suppression can be accurately determined. It is easy to adjust and obtain. In addition, it is only necessary to manufacture the silencer 308 having the same size and shape, which facilitates mass production and improves productivity.

  Supplementary Note 3 The invention is characterized in that the attachment member 327 is constituted by a bolt, is inserted into the presser member 328 and the sound deadening material 308, is formed by opening an opening in the outward flange 338, and is screwed to a screw. To do.

  According to the invention of Supplementary Note 3, the bolt as the mounting member 327 is inserted into the holding member 328 and the sound deadening material 308 and screwed to the female screw of the outward flange 338. In order to adjust the variation of the bolt, it is only necessary to change the required length of the bolt. Furthermore, it is certain that almost the entire circumferential surface 324 of the silencer 308 is opened to the atmosphere, and the configuration is simplified. be able to.

  Supplementary Note 3 The invention is characterized in that a gap exists between the inner peripheral surface of the insertion hole 310 of the sound deadening material 308 and the outer peripheral surface of the cylindrical portion 340 of the nozzle member 339.

  According to the invention of Supplementary Note 3, since minute foreign matter is stored and stored in the gap, when the fire extinguishing gas is injected from the nozzle hole 304, the nozzle hole 304 is prevented from being clogged by the foreign matter, and the foreign matter Generation of noise and flow rate decrease due to clogging can be prevented. Foreign matter exists in the conduit 314, for example, a scale and slag formed by welding in the conduit 314, and when the conduit 314 is a plated tube, a stripped piece of a plated layer in the plated tube, rust, and a sealant used in a pipe joint Such as debris.

  Supplementary Note 3 The invention is characterized in that the inner peripheral surface of the insertion hole 310 of the sound deadening material 308 and the outer peripheral surface of the cylindrical portion 340 of the nozzle member 339 are in close contact with each other.

  According to the third aspect of the invention, the noise reduction effect is improved by the close contact between the inner peripheral surface of the insertion hole 310 of the silencer 308 and the outlet end surface of the nozzle hole 304 formed in the cylindrical portion 340 of the nozzle member 339. This has been confirmed by the present inventor, as will be described later with reference to FIGS.

(Appendix 3 Effect of Invention)
According to the third aspect of the invention, since the sound deadening means 302 is provided in the ejection head 300, even if a high-pressure fire extinguishing gas is ejected from the nozzle member 339 of the ejection head 300 in the event of a fire, a large ejection sound is generated and the flow rate is reduced. Can be prevented.

  Further, according to the supplementary note 3 invention, since the peripheral surface 324 of the sound deadening material 308 is opened to the atmosphere, the injection of the fire extinguishing gas is not hindered by an obstacle or the like. Generation of sound can be prevented.

  Each of the plurality of silencers 308 is made of a porous material through which gas can flow, is formed into a flat plate shape, and is laminated and assembled. Therefore, by selecting the number of stacks according to the flow rate of fire extinguishing gas injected into the space within the fire extinguishing target area, the pressure, and the degree of need for noise suppression, the desired characteristics of various injections and noise suppression can be accurately determined. It is easy to adjust and obtain. In addition, it is only necessary to manufacture the silencer 308 having the same size and shape, which facilitates mass production and improves productivity.

(Appendix 4 invention)
Appendix 4 The invention
(A) an injection head 400 having a nozzle hole 404 for injecting a high-pressure fire extinguishing gas toward a space in a fire extinguishing target section in a building;
(B) a conduit 14 having an end portion 14a to which the ejection head 400 is connected, and guiding high-pressure fire extinguishing gas to the ejection head 400;
(C) a fire extinguishing gas supply source 15 for supplying a high pressure fire extinguishing gas to the conduit 14;
(D) a gas fire extinguishing device provided on the ejection head 400 and including a sound extinguishing means 402 for attenuating sound caused by the discharge of the fire extinguishing gas from the nozzle hole 404,
(E) The ejection head 400 is
(E1) an ejection head body 401 connected to the end portion 14a of the conduit 14,
(E2) a nozzle member 409,
(E2-1) a cylindrical portion 440 extending along the axis of the end portion 14a of the conduit 14 and having one end in the axial direction connected to the ejection head main body 401;
(E2-2) a nozzle member 409 that is connected to the other axial end of the cylindrical portion 440, has a nozzle hole 404, and has an end wall 441 that closes the other axial end of the cylindrical portion 440. f) The silencer 402
(F1) The sound deadening material 408, which is formed in a flat plate shape, made of a porous material through which a gas can flow, is laminated, and an end surface 420 on one side in the axial direction of the laminated sound deadening material 408. Is a sound deadening material 408 disposed facing the ejection head body 401;
(F2) a holding member 428 for holding the end surface 425 on the other side in the axial direction of the laminated sound deadening material 408;
(F3) an attachment member 427 for sandwiching and fixing the sound deadening material 408 between the ejection head main body 401 and the pressing member 428;
(F4) A guide member having an annular mounting portion 422 disposed facing the ejection head main body 401, and a short cylindrical guide portion 423 that is continuous with the mounting portion 422 and covers the peripheral surface 424 of the laminated sound deadening material. 421 is a gas fire extinguishing apparatus.

  According to the fourth aspect of the invention, the high-pressure fire extinguishing gas supplied to the conduit 14 from the fire extinguishing gas supply source 15 is jetted toward the space in the building via the jet head 400. Such a jet head 400 is provided with a sound deadening means 402, which can prevent the generation of a loud jet sound due to the jet flow of fire extinguishing gas jetted from the nozzle hole 404 of the jet head 400 at a high speed.

  The guide member 421 includes an attachment portion 422 and a short cylindrical guide portion 423 that continues to the attachment portion 422 and guides the fire extinguishing gas. The other end surface 425 of the sound deadening material 408 is open to the atmosphere except for a portion in contact with the pressing member 428. The peripheral surface 424 of the sound deadening material 408 is surrounded by the guide portion 423 of the guide member 421. Therefore, the fire extinguishing gas flows from the conduit 14 through the ejection head 400 and the nozzle hole 404 of the nozzle member 409 into the sound deadening material 408, passes through a fine gap of the sound deadening material 408, and expands under reduced pressure. In a state in which the discharge from the peripheral surface 424 is suppressed by the guide portion 423, the fire extinguishing gas can be made to reach far away without causing a loud sound by being injected into the space in the fire extinguishing target section in the building.

  Regarding the large sound reduction effect by the small configuration, the high-pressure fire extinguishing gas injected through the nozzle hole 404 at the time of fire extinguishing is expanded under reduced pressure by passing through a fine gap of the sound deadening material 408, and thus the fire fighting gas Generation of sound is effectively suppressed by gradually and smoothly decompressing and expanding without reducing the flow rate. Thus, since it is not necessary to provide a large acoustic attenuation space for attenuating sound, a large acoustic reduction effect can be achieved while miniaturizing the configuration.

  The plurality of silencers 408 are made of a porous material through which gas can flow, are formed into flat plate shapes, and are stacked and assembled. Therefore, by selecting the number of stacks according to the flow rate of fire extinguishing gas injected into the space within the fire extinguishing target area, the pressure, and the degree of need for noise suppression, the desired characteristics of various injections and noise suppression can be accurately determined. It is easy to adjust and obtain. Moreover, what is necessary is just to manufacture the silencer 408 which has the same size shape, mass production is easy, and productivity is improved.

  Supplementary Note 4 The invention is characterized in that a gap 415 exists between an end face of the sound deadening material 408 facing the nozzle hole 404 and an end face of the nozzle member 409 facing the sound deadening material 408.

  According to the fourth aspect of the invention, since the gap 415 is provided between the end face of the silencer 408 facing the nozzle hole 404 and the end face of the nozzle member 409 facing the silencer 408, foreign matter is left in the gap 415. When the fire extinguishing gas is jetted from the nozzle hole 404, the sound deadening material 408 is prevented from being clogged by foreign matters, and the generation of noise and the decrease in flow rate due to the clogging of foreign matters are prevented. Foreign matter is present in the conduit 14, for example, a scale and slag formed by welding in the conduit 14, and when the conduit 14 is a plated tube, a stripped piece of a plated layer in the plated tube, rust, and a sealing material used in a pipe joint Such as debris.

  Supplementary Note 4 The invention is characterized in that the guide member 421 further includes an annular widened portion 443 that extends to the other end side in the axial direction of the guide portion 423 and widens in a truncated cone shape.

  According to the fourth aspect of the invention, since the guide member 421 has the widened portion 443, the fire extinguishing gas released from the end surface on the other side in the axial direction of the sound deadening material 408 is released radially outward with respect to the axis of the ejection head. It is possible to suppress the diffusion of the fire extinguishing gas so that the fire extinguishing gas can reach far away, and a required amount of the fire extinguishing gas can be released into the fire extinguishing target section.

(Additional Effects of Invention 4)
According to the supplementary note 4 invention, since the muffling means 402 is provided in the ejection head 400, it is possible to prevent a large ejection sound from being generated even when a high-pressure fire extinguishing gas is ejected from the ejection head 400 when a fire occurs. . The plurality of silencers 408 are made of a porous material through which a gas can flow, are formed into a flat plate shape, and are stacked and assembled. Therefore, by selecting the number of stacks according to the flow rate of fire extinguishing gas injected into the space within the fire extinguishing target area, the pressure, and the degree of need for noise suppression, the desired characteristics of various injections and noise suppression can be accurately determined. It is easy to adjust and obtain. Moreover, what is necessary is just to manufacture the silencer 408 which has the same size shape, mass production is easy, and productivity is improved.

  Further, according to Supplementary Note 4, the gap 415 is provided between the end face of the sound deadening material 408 facing the nozzle hole 404 and the end face of the ejection head 400 facing the sound deadening material 408, so that a fine foreign matter Is stored and stored in the gap 415, and when the fire extinguishing gas is injected from the nozzle hole 404, the silencing material 408 is prevented from being clogged by foreign matter, and noise generation due to clogging of the foreign matter is prevented and fire extinguishing is prevented. It is possible to prevent a decrease in flow rate due to clogging during gas injection.

  According to the fourth aspect of the invention, since the guide member 421 has the widened portion 443, the fire extinguishing gas released from the end surface on the other side in the axial direction of the sound deadening material 408 is immediately outward in the radial direction with respect to the axis of the ejection head. It is possible to suppress the diffusion of the fire extinguishing gas so that the fire extinguishing gas can reach far away, and a required amount of the fire extinguishing gas can be released into the fire extinguishing target section.

  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.

  14 conduit, 15 fire extinguishing gas supply source, 18 branch pipe, 19 branch pipe, 20 base, 21 bracket, 22 fastener, 23 main pipe, 100 jet head, 101 jet head main body, 102 silencer means, 103 mounting auxiliary member, 104 Nozzle hole, 105 base, 106 outward flange, 108 second silencer, 109 rectifying member, 110 screw, 111 fire extinguishing gas injection part, 112 rectifying hole, 113 first silencer, 114 annular member, 121 guide member, 122 mounting Part, 123 guide part, 124 peripheral surface, 128 holding member, 131 mounting seat, 137 base part, 138 engaging part, 200 jetting head, 201 jetting head main body, 202 silencer, 204 nozzle hole, 205 base part, 206 outward flange, 208 Silencer, 221 Guide member, 222 Mounting part, 2 3 guide part, 224 peripheral surface, 400 jet head, 401 jet head main body, 402 silencer means, 403 attachment auxiliary member, 404 nozzle hole, 405 base, 406 outward flange, 407,410 screw, 408 silencer, 409 nozzle member 415 gap, 420 end surface, 421 guide member, 422 mounting portion, 423 guide portion, 424 peripheral surface, 425 end surface, 427 mounting member, 428 presser member, 431 mounting seat, 432 end surface, 443 widening portion.

Claims (9)

A fire extinguishing gas injection device that injects a high-pressure fire extinguishing gas toward a space in a fire extinguishing target section in a building,
The fire extinguishing gas jetting apparatus has a jetting head and a sound deadening means for attenuating sound due to the discharge of the fire extinguishing gas from the jetting head,
The silencing means includes a first silencing member that is provided on the jet head side and is configured by a laminate, and a second silencing member that is provided on the downstream side of the first silencing member and is configured by a laminate. Have
Each layer of the laminated body of the first and second silencing members is a fire extinguishing gas injection device that is formed in a flat plate shape and is made of a porous material through which gas can flow.   The fire-extinguishing gas injection device according to claim 1, wherein the first and second silencing members are stacked to form a columnar shape or a cylindrical shape. The fire extinguishing according to claim 1 or 2 , wherein each layer of the laminate of the first silencing member has the same outer diameter, and each layer of the laminate of the second silencing member has the same outer diameter. Gas injection device. 4. Each of the layers of the laminate constituting the first silencing member has the same thickness, and each layer of the laminate constituting the second silencing member has the same thickness. The fire extinguishing gas injection device according to claim 1.   The fire extinguishing gas injection device according to any one of claims 1 to 4, wherein the entire outer peripheral surfaces of the first and second silencing members are exposed to the atmosphere.   The fire-extinguishing gas injection device according to any one of claims 1 to 5, further comprising an annular or plate-like pressing member that fixes the second silencing member.   The silencer has a first silencer located upstream and a second silencer located downstream, and gas can flow between the first silencer and the second silencer. The fire-extinguishing gas injection device according to any one of claims 1 to 6, wherein an intermediate member is disposed. A fire extinguishing gas injection device that injects a high-pressure fire extinguishing gas toward a space in a fire extinguishing target section in a building,
The fire extinguishing gas jetting device has a jetting head and a sound deadening means for attenuating sound caused by the discharge of the fire extinguishing gas from the jetting head, and the sound deadening means is arranged such that a plurality of flat plate-like members come into contact with each other. It is made of a porous material that is formed by laminating and allowing gas to flow.
The ejection head is provided with a nozzle hole,
A high-pressure fire extinguishing gas is guided to the jet head, and the fire extinguishing gas is jetted from the nozzle hole and introduced into the sound deadening means,
A fire extinguishing gas jetting apparatus, wherein a gap for holding and storing foreign matter from the nozzle hole is provided between a surface of the jetting head facing the silencer and the silencer.   The fire-extinguishing gas injection device according to any one of claims 1 to 8, a conduit for introducing a high-pressure fire-extinguishing gas to the fire-extinguishing gas injection device, and a fire-extinguishing gas supply source for supplying a high-pressure fire-extinguishing gas to the conduit Gas fire extinguisher equipped.

Images