JP7344240B2 - Silencer and gas fire extinguishing equipment - Google Patents

Silencer and gas fire extinguishing equipment Download PDF

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JP7344240B2
JP7344240B2 JP2021055195A JP2021055195A JP7344240B2 JP 7344240 B2 JP7344240 B2 JP 7344240B2 JP 2021055195 A JP2021055195 A JP 2021055195A JP 2021055195 A JP2021055195 A JP 2021055195A JP 7344240 B2 JP7344240 B2 JP 7344240B2
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秀晃 後藤
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Description

本発明は、火災発生時に建物の消火対象区画内にＮ２ガスまたはハロゲン化物ガスなどの消火ガスを消火剤として放出することによって、消火対象区画内のＯ２濃度を低下させて消火するガス消火設備に関し、さらに詳しくは消火対象区画内に設けられる噴射ヘッドから消火ガスを噴射した際に発生する大音響を低減するために好適に実施することができるガス消火設備に関する。 The present invention is a gas fire extinguisher that reduces the O 2 concentration in the area to be extinguished by releasing extinguishing gas such as N 2 gas or halide gas as an extinguishing agent into the area to be extinguished in the area of the building when a fire occurs. The present invention relates to equipment, and more specifically to gas fire extinguishing equipment that can be suitably implemented to reduce loud noises generated when extinguishing gas is injected from an injection head provided in a fire extinguishing target section.

従来から、消火剤としてＣＯ２ガスおよびＮ２ガスおよびハロゲン化物などの消火ガスを消火対象区画内に放出して、その消火対象区画内のＯ２濃度を低下させることによって消火を行うガス消火設備が各種の建物に装備されている。 Conventionally, gas fire extinguishing equipment has been used to extinguish fires by releasing extinguishing gases such as CO 2 gas, N 2 gas, and halides as extinguishing agents into the compartment to be extinguished, thereby reducing the O 2 concentration within the compartment to be extinguished. are installed in various buildings.

図１６は、従来技術のガス消火設備で用いられる消火ガス噴射部１を示す斜視図である。消火ガス噴射部１は、消火ガス供給源２から火災発生時に供給される高圧の消火ガスを噴射する噴射ヘッド３と、噴射ヘッド３が接続される導管４とを備える。 FIG. 16 is a perspective view showing a fire extinguishing gas injection unit 1 used in a conventional gas fire extinguishing equipment. The extinguishing gas injection unit 1 includes an injection head 3 that injects high-pressure extinguishing gas supplied from an extinguishing gas supply source 2 when a fire occurs, and a conduit 4 to which the injection head 3 is connected.

導管４は、消火ガス供給源２に接続される主管５と、主管５に介在される分岐管６と、分岐管６によって主管５からの消火ガスが導かれ、前記噴射ヘッド３が接続される枝管７とを有する。主管５は、建物の躯体またはその躯体に固定された基台８およびブラケット９にＵボルトなどの締結具１０によって締結され、噴射ヘッド３の振動および変位が抑制された状態で設置されている（たとえば、特許文献１参照）。 The conduit 4 includes a main pipe 5 connected to the extinguishing gas supply source 2, a branch pipe 6 interposed in the main pipe 5, and an extinguishing gas from the main pipe 5 guided by the branch pipe 6, to which the injection head 3 is connected. It has a branch pipe 7. The main pipe 5 is fastened to a building frame or a base 8 and a bracket 9 fixed to the frame using fasteners 10 such as U-bolts, and is installed in a state where vibration and displacement of the injection head 3 are suppressed ( For example, see Patent Document 1).

特開平８－１７３５６５号公報Japanese Unexamined Patent Publication No. 8-173565

前記従来の技術では、消火ガス供給源２から導管４を経て供給される高圧の消火ガスを噴射ヘッド３から大量に噴射するため、噴射ヘッド３のノズル部１１２に形成されるノズル孔１１６から高速で噴射される消火ガス流によって、いわば空気を切り裂くような大音響を発生してしまうという問題がある。 In the conventional technology, in order to inject a large amount of high-pressure extinguishing gas supplied from the extinguishing gas supply source 2 through the conduit 4 from the injection head 3, high-speed gas is There is a problem in that the extinguishing gas flow injected by the fire extinguisher generates a loud sound that cuts through the air.

本発明の目的は、噴射ヘッドからの消火ガスの噴射流に起因する音響を減衰させることができるガス消火設備を提供することである。 An object of the present invention is to provide a gas fire extinguishing equipment capable of attenuating sound caused by a jet flow of fire extinguishing gas from an injection head.

本発明は、
（ａ）高圧の消火ガスを導く導管１４と、
（ｂ）導管１４に高圧の消火ガスを供給する消火ガス供給源１５と、
（ｃ）噴射ヘッド１３であって、
高圧の消火ガスを建物内の消火対象区画内の空間に向けて噴射するノズル孔１６が形成されるノズル部１２と、
導管１４の端部に接続される噴射ヘッド端部とを有する噴射ヘッド１３と、
（ｄ）ノズル部１２からの消火ガスの放出による音響を減衰させて消火対象区画内の空間へ噴射する消音装置１７，１７ｂ、１７ｃ、１７ｆ、１７ｇ、１７ｈであって、
噴射ヘッド１３に着脱可能である取付け部４３を有する消音装置１７，１７ｂ、１７ｃ、
１７ｆ、１７ｇ、１７ｈとを備えることを特徴とするガス消火設備である。
本発明は、また、
噴射ヘッド１３のノズル部１２は、噴射ヘッド１３における消火ガスの噴射方向下流側(
図２，４，５，１３，１４，１５の左方)に設けられ、
前記噴射ヘッド端部は、噴射ヘッド１３における消火ガスの噴射方向上流側(図２，４，
５，１３，１４，１５の右方)に設けられ、
ノズル孔１６と、前記噴射ヘッド端部とは、導管１４の前記端部の軸線に沿って延びることを特徴とする。
本発明は、また、
噴射ヘッド端部は、第１ねじによって導管１４の端部に接続され、
消音装置１７，１７ｂ、１７ｃ、１７ｆ、１７ｇ、１７ｈは、第２ねじによって噴射ヘッド１３のノズル部１２に、着脱可能であり、
消音装置１７，１７ｂ、１７ｃ、１７ｆ、１７ｇ、１７ｈは、導管１４の前記端部の軸線に沿って延びる軸線を有することを特徴とする。
本発明は、図２のように、
消音装置１７は、筒状の周壁２５と、周壁２５の軸線方向一端部に、該周壁２５の軸線に垂直に形成される端壁２６と、周壁２５の軸線方向他端部に、噴射ヘッド１３に着脱可能に形成される取付け部２７とを含み、
端壁２６には、周壁２５の軸線上にガス放出孔３４が該端壁の厚み方向に貫通して形成され、
周壁２５、端壁２６および取付け部２７によって規定される内部空間には、周壁２５の内周面に沿って装着された筒状の吸音材３３が収容されることを特徴とする。
本発明は、図４のように、
消音装置１７ｂは、
（ｅ）ノズル孔１６の軸線に沿って延びる軸線を有する円筒状の周壁３５であって、
ノズル孔１６の出口から消火ガスの噴射方向下流に拡がった内部空間３９を形成する周壁３５と、
（ｆ）周壁３５の軸線方向のノズル部１２から遠ざかった一端部に形成される端壁３６であって、前記周壁３５とともに前記内部空間３９を規定し、この端壁３６には、複数の通気孔３８が該端壁３６の厚み方向に貫通して形成される端壁３６と、
（ｇ）周壁３５の軸線方向のノズル部１２に近い他端部に形成され、噴射ヘッド１３に着脱可能に取付けられる取付け部３７と、
（ｈ）前記内部空間３９に詰めて装填されて収容される吸音材４０であって、
微細な空隙を有し、
噴射ヘッド１３のノズル部１２から高速で噴射された消火ガスを、前記内部空間３９に収容された吸音材４０で拡散させて徐々に減圧膨張させてその流速を下げ、消火ガスの噴射流の振動を吸収し、前記通気孔３８から前記消火対象区画内の空間へ放出する吸音材４０とを含むことを特徴とする。
本発明は、図５のように、
消音装置１７ｃは、
（ｉ）導管１４の前記端部の軸線に沿って延びる軸線を有する円筒状の周壁４１であって、
ノズル孔１６の出口から消火ガスの噴射方向下流で拡がった内部空間４５を形成し、
複数の通気孔４４が分布して、該周壁４１の厚み方向に貫通して形成される周壁４１と、（ｊ）周壁４１の軸線方向のノズル部１２から遠ざかった一端部に、該周壁４１の軸線に垂直に形成され、前記周壁４１とともに内部空間４５を規定する端壁４２と、
（ｋ）周壁４１の軸線方向のノズル部１２に近い他端部に形成される取付け部４３であって、噴射ヘッド１３のノズル部１２に、前記第２ねじによって、着脱可能である取付け部４３と、
（ｌ）前記内部空間４５に隙間なく詰めて装填されて収容される吸音材４６であって、微
細な空隙を有し、噴射ヘッド１３のノズル部１２から高速で噴射された消火ガスを、前記内部空間４５内で拡散させて徐々に減圧膨張させてその流速を下げ、消火ガスの噴射流の振動を吸収し、前記通気孔４４から前記消火対象区画内の空間へ放出する吸音材４６とを含むことを特徴とする。
本発明は、図１３のように、
ノズル孔１６は、導管１４の端部の導管軸線に沿って延びるノズル孔軸線Ｌ１２を有し、ノズル孔１６のノズル孔軸線Ｌ１２に垂直な断面は、ノズル孔軸線Ｌ１２に沿って一様であり、
噴射ヘッド１３のノズル部１２におけるノズル孔１６が開口するノズル孔１６の出口端部まわりの端面１２ａは、ノズル孔軸線Ｌ１２に垂直な仮想平面上に形成され、
消音装置１７ｆは、
（ｍ）ノズル孔軸線Ｌ１２に沿って延びる周壁軸線Ｌ１２１を有する円筒状の周壁１２１であって、
ノズル孔１６の出口から消火ガスの噴射方向下流に拡がった内部空間１２４を形成する周壁１２１と、
（ｎ）周壁１２１における周壁軸線Ｌ１２１方向のノズル部１２から遠ざかった一端部に連なって形成され、前記周壁１２１とともに前記内部空間１２４を規定し、透孔１２２ｂが周壁軸線Ｌ１２１方向に貫通して形成される端壁１２２と、
（ｏ）周壁１２１における周壁軸線Ｌ１２１方向のノズル部１２に近い他端部に形成され、噴射ヘッド１３に取付けられる取付け部１２３と、
（ｐ）前記内部空間１２４に隙間なく詰めて装填されて収容される吸音材１２５であって、
多孔質材料から成り、
周壁軸線Ｌ１２１に一致する吸音材軸線Ｌ１２５を有する柱状であり、
吸音材１２５の前記ノズル部１２から遠ざかった一端面１２５ｂと、前記ノズル部１２に近い他端面１２５ｃとを有し、
吸音材１２５の前記ノズル部１２に近い前記他端面１２５ｃは、吸音材軸線Ｌ１２５に垂直な仮想平面上に形成され、
取付け部１２３が噴射ヘッド１３に取付けられることによって、前記一端面１２５ｂ側が前記端壁１２２に支持されるとともに、前記他端面１２５ｃと前記ノズル部１２の前記端面１２ａとが面接触し、
微細な空隙を有し、
噴射ヘッド１３のノズル部１２から高速で噴射された消火ガスを、前記内部空間１２４に収容された吸音材１２５で拡散させて徐々に減圧膨張させてその流速を下げ、消火ガスの噴射流の振動を吸収し、前記透孔１２２ｂから前記消火対象区画内の空間へ放出する吸音材１２５とを含むことを特徴とする。
本発明は、図１４のように、
噴射ヘッド１３のノズル部１２におけるノズル孔１６が開口するノズル孔１６の出口端部まわりの端面は、ノズル孔１６の軸線に垂直な仮想平面上に形成され、
消音装置１７ｇは、
（ｑ）ノズル孔１６の軸線に沿って延びる軸線を有する円筒状の周壁１３１であって、
ノズル孔１６の出口から消火ガスの噴射方向下流に拡がった内部空間１４０を形成する周壁１３１と、
（ｒ）周壁１３１の軸線方向のノズル部１２から遠ざかった一端部に形成され、前記周壁１３１とともに前記内部空間１４０を規定し、透孔が周壁１３１の軸線方向に貫通して形成される端壁１４３と、
（ｓ）周壁１３１の軸線方向のノズル部１２に近い他端部に形成され、噴射ヘッド１３に取付けられる取付け部１３３と、
（ｔ）前記内部空間１４０に収容される第1、第２および第３吸音材１３４，１３５，１
３６であって、多孔質金属から成り、周壁１３１の軸線方向に、前記ノズル部１２から端
壁１４３に、第1吸音材１３４と、
第３吸音材１３６と、第２吸音材１３５とが、この順序で設けられ、
第1吸音材１３４と第２吸音材１３５とは、周壁１３１の軸線に一致する軸線を有する柱
状であり、
第３吸音材１３６は、周壁１３１の軸線に一致する軸線を有する筒状であり、
第１吸音材１３４の前記ノズル部１２に近い端面は、第１吸音材１３４の前記軸線に垂直な仮想平面上に形成され、
第２吸音材１３５は、前記ノズル部１２から遠ざかった端面を有し、
取付け部１３３が噴射ヘッド１３に取付けられることによって、第２吸音材１３５の前記ノズル部１２から遠ざかった前記端面と前記端壁１４３とが接触するとともに、第１吸音材１３４の前記ノズル部１２に近い前記端面と前記ノズル部１２の前記端面とが面接触し、
これらの第１、第２および第３吸音材１３４，１３５，１３６は、
微細な空隙を有し、
噴射ヘッド１３のノズル部１２から高速で噴射された消火ガスを、前記内部空間１４０に収容された第１～第３吸音材１３４，１３５，１３６で拡散させて徐々に減圧膨張させてその流速を下げ、消火ガスの噴射流の振動を吸収し、前記透孔１２２ｂから前記消火対象区画内の空間へ放出する第１、第２および第３吸音材１３４，１３５，１３６とを含むことを特徴とする。
本発明は、図１５のように、
噴射ヘッド１３は、
導管１４の端部に接続され、この端部の軸線に追って延び、複数のノズル孔１６が厚み方向に貫通して形成される筒部１６７と、
導管１４の端部から遠ざかった筒部１６７の軸線方向一端部を塞ぐ端壁部１６５とを有し、
消音装置１７ｈは、
（ｕ）第１吸音材１５２であって、
筒状に形成され、
噴射ヘッド１３の筒部１６７が挿通され、
噴射ヘッド１３の筒部１６７の外周面であるノズル孔１６の出口端部まわりの円弧状端面に、面接触する内周面を有する第１吸音材１５２と、
（ｖ）ケーシング１５０であって、
（ｖ１）噴射ヘッド１３の筒部１６７の軸線に沿って延び、第１吸音材１５２の放射方向に間隔をあけて外囲する筒部１５７と、
（ｖ２）導管１４の端部の近くで筒部１５７を塞ぎ、噴射ヘッド１３に接続されるケーシング端壁部１５９とを有するケーシング１５０と、
（ｗ）筒状に形成され、筒部１５７の内周面に沿って配置され、第１吸音材１５２の外周面との間に環状の空間１７０を形成する第２吸音材１５３と、
（ｘ）ケーシング１５０の筒部１５７における導管１４の端部から遠ざかった端部に配置され、環状の空間からの消火ガスを消火対象区画内の空間へ放出する第３吸音材１５６とを含み、
（ｙ）これらの第１、第２および第３吸音材１５２，１５３，１５６は、
微細な空隙を有し、
噴射ヘッド１３のノズル部１２から高速で噴射された消火ガスを、拡散させて徐々に減圧膨張させてその流速を下げ、消火ガスの噴射流の振動を吸収することを特徴とする。
本発明は、
消音装置１７ｂ；１７ｃ；１７ｆ；１７ｇ；１７ｈは、
噴射ヘッド１３のノズル部１２におけるノズル孔１６が開口するノズル孔１６の出口端部まわりの端面１２ａに、吸音材４０；４６；１２５；１３４；１５２の端面１２５ｃが面接触し、吸音材４０；４６；１２５；１３４；１５２は、微細な空隙を有し、
噴射ヘッド１３に形成されたノズル部１２のノズル孔１６から高速で噴射された消火ガスを、吸音材４０；４６；１２５；１３４；１５２で拡散させて徐々に減圧膨張させてその流速を下げることを特徴とする。 The present invention
(a) a conduit 14 that guides high-pressure extinguishing gas;
(b) a fire extinguishing gas supply source 15 that supplies high pressure fire extinguishing gas to the conduit 14;
(c) A jetting head 13,
a nozzle part 12 in which a nozzle hole 16 is formed for injecting high-pressure extinguishing gas toward a space within a fire-extinguishing target section of the building;
a jetting head 13 having a jetting head end connected to an end of the conduit 14;
(d) Silencers 17, 17b, 17c, 17f, 17g, 17h that attenuate the sound caused by the release of extinguishing gas from the nozzle part 12 and inject it into the space in the area to be extinguished,
Silencers 17, 17b, 17c, each having a mounting portion 43 that can be attached to and detached from the injection head 13;
This gas fire extinguishing equipment is characterized by comprising 17f, 17g, and 17h.
The present invention also includes:
The nozzle part 12 of the injection head 13 is located on the downstream side (in the injection direction of extinguishing gas in the injection head 13
2, 4, 5, 13, 14, 15 left side),
The end of the injection head is located on the upstream side in the injection direction of the extinguishing gas in the injection head 13 (see FIGS. 2, 4,
5, 13, 14, 15),
The nozzle hole 16 and the end of the injection head are characterized in that they extend along the axis of the end of the conduit 14 .
The present invention also includes:
the jet head end is connected to the end of the conduit 14 by a first screw;
The silencers 17, 17b, 17c, 17f, 17g, and 17h can be attached to and detached from the nozzle portion 12 of the injection head 13 using second screws,
The muffling devices 17, 17b, 17c, 17f, 17g, 17h are characterized in that they have an axis extending along the axis of the end of the conduit 14.
The present invention, as shown in FIG.
The silencer 17 includes a cylindrical peripheral wall 25, an end wall 26 formed perpendicularly to the axis of the peripheral wall 25 at one axial end of the peripheral wall 25, and an injection head 13 at the other axial end of the peripheral wall 25. and a mounting portion 27 formed to be removably attached to the
A gas release hole 34 is formed in the end wall 26 on the axis of the peripheral wall 25 so as to pass through the end wall in the thickness direction,
The internal space defined by the peripheral wall 25, the end wall 26, and the attachment part 27 is characterized in that a cylindrical sound absorbing material 33 attached along the inner circumferential surface of the peripheral wall 25 is accommodated.
The present invention, as shown in FIG.
The silencer 17b is
(e) a cylindrical peripheral wall 35 having an axis extending along the axis of the nozzle hole 16;
a peripheral wall 35 forming an internal space 39 extending downstream from the outlet of the nozzle hole 16 in the direction of extinguishing gas;
(f) An end wall 36 formed at one end of the peripheral wall 35 remote from the nozzle portion 12 in the axial direction, which defines the internal space 39 together with the peripheral wall 35, and this end wall 36 has a plurality of passages. an end wall 36 in which pores 38 are formed to penetrate through the end wall 36 in the thickness direction;
(g) an attachment portion 37 formed at the other end of the peripheral wall 35 near the nozzle portion 12 in the axial direction and detachably attached to the ejection head 13;
(h) a sound absorbing material 40 loaded and housed in the internal space 39;
Has minute voids,
The extinguishing gas injected at high speed from the nozzle part 12 of the injection head 13 is diffused by the sound absorbing material 40 housed in the internal space 39 and gradually expanded under reduced pressure to lower the flow velocity and reduce the vibration of the extinguishing gas jet stream. It is characterized by including a sound absorbing material 40 that absorbs sound and releases it from the ventilation hole 38 into the space within the fire extinguishing target section.
The present invention, as shown in FIG.
The silencer 17c is
(i) a cylindrical peripheral wall 41 having an axis extending along the axis of the end of the conduit 14;
An internal space 45 is formed that expands downstream from the exit of the nozzle hole 16 in the injection direction of the extinguishing gas,
(j) a peripheral wall 41 in which a plurality of ventilation holes 44 are distributed and formed to penetrate through the peripheral wall 41 in the thickness direction; an end wall 42 formed perpendicular to the axis and defining an internal space 45 together with the peripheral wall 41;
(k) An attachment portion 43 formed at the other end of the peripheral wall 41 near the nozzle portion 12 in the axial direction, and which is attachable to and detachable from the nozzle portion 12 of the ejection head 13 using the second screw. and,
(l) A sound absorbing material 46 packed and housed in the internal space 45 without any gaps, which has minute gaps, and which absorbs the extinguishing gas injected at high speed from the nozzle portion 12 of the injection head 13. A sound absorbing material 46 that is diffused within the internal space 45 and gradually expanded under reduced pressure to lower its flow velocity, absorbs vibrations of the extinguishing gas jet stream, and releases the sound absorbing material 46 from the vent hole 44 to the space within the extinguishing target section. It is characterized by containing.
The present invention, as shown in FIG.
The nozzle hole 16 has a nozzle hole axis L12 extending along the conduit axis at the end of the conduit 14, and a cross section of the nozzle hole 16 perpendicular to the nozzle hole axis L12 is uniform along the nozzle hole axis L12. ,
An end surface 12a around the outlet end of the nozzle hole 16 in the nozzle portion 12 of the ejection head 13 is formed on a virtual plane perpendicular to the nozzle hole axis L12,
The silencer 17f is
(m) A cylindrical peripheral wall 121 having a peripheral wall axis L121 extending along the nozzle hole axis L12,
a peripheral wall 121 forming an internal space 124 extending downstream in the direction of extinguishing gas from the outlet of the nozzle hole 16;
(n) Formed continuously at one end of the peripheral wall 121 that is remote from the nozzle part 12 in the direction of the peripheral wall axis L121, defines the internal space 124 together with the peripheral wall 121, and is formed with a through hole 122b penetrating in the direction of the peripheral wall axis L121. an end wall 122 that is
(o) an attachment part 123 formed at the other end of the peripheral wall 121 in the direction of the peripheral wall axis L121 near the nozzle part 12 and attached to the ejection head 13;
(p) A sound absorbing material 125 loaded and housed in the internal space 124 without any gaps,
Made of porous material,
It is columnar with a sound absorbing material axis L125 coinciding with the peripheral wall axis L121,
The sound absorbing material 125 has one end surface 125b remote from the nozzle section 12 and the other end surface 125c close to the nozzle section 12,
The other end surface 125c of the sound absorbing material 125 close to the nozzle portion 12 is formed on a virtual plane perpendicular to the sound absorbing material axis L125,
By attaching the attachment part 123 to the ejection head 13, the one end surface 125b side is supported by the end wall 122, and the other end surface 125c and the end surface 12a of the nozzle part 12 are in surface contact,
Has minute voids,
The extinguishing gas injected at high speed from the nozzle part 12 of the injection head 13 is diffused by the sound absorbing material 125 housed in the internal space 124 and gradually expanded under reduced pressure to lower its flow velocity, thereby reducing the vibration of the extinguishing gas jet stream. It is characterized by including a sound absorbing material 125 that absorbs sound and releases it from the through hole 122b into the space within the fire extinguishing target section.
The present invention, as shown in FIG.
The end surface around the outlet end of the nozzle hole 16 in the nozzle portion 12 of the jetting head 13 is formed on a virtual plane perpendicular to the axis of the nozzle hole 16,
The silencer 17g is
(q) A cylindrical peripheral wall 131 having an axis extending along the axis of the nozzle hole 16,
a peripheral wall 131 forming an internal space 140 extending downstream from the exit of the nozzle hole 16 in the direction of extinguishing gas;
(r) An end wall formed at one end of the peripheral wall 131 remote from the nozzle part 12 in the axial direction, defining the internal space 140 together with the peripheral wall 131, and having a through hole passing through the peripheral wall 131 in the axial direction. 143 and
(s) an attachment portion 133 formed at the other end of the peripheral wall 131 near the nozzle portion 12 in the axial direction and attached to the ejection head 13;
(t) First, second and third sound absorbing materials 134, 135, 1 accommodated in the internal space 140
36, which is made of porous metal and extends from the nozzle portion 12 to the end wall 143 in the axial direction of the peripheral wall 131, with a first sound absorbing material 134;
The third sound absorbing material 136 and the second sound absorbing material 135 are provided in this order,
The first sound absorbing material 134 and the second sound absorbing material 135 are columnar with an axis that coincides with the axis of the peripheral wall 131,
The third sound absorbing material 136 has a cylindrical shape with an axis that coincides with the axis of the peripheral wall 131,
An end surface of the first sound absorbing material 134 close to the nozzle part 12 is formed on a virtual plane perpendicular to the axis of the first sound absorbing material 134,
The second sound absorbing material 135 has an end face remote from the nozzle part 12,
By attaching the attachment part 133 to the ejection head 13, the end surface of the second sound absorbing material 135 that is remote from the nozzle part 12 contacts the end wall 143, and the end surface of the second sound absorbing material 135 that is away from the nozzle part 12 comes into contact with the nozzle part 12 of the first sound absorbing material 134. The close end surface and the end surface of the nozzle part 12 are in surface contact,
These first, second and third sound absorbing materials 134, 135, 136 are
Has minute voids,
The extinguishing gas injected at high speed from the nozzle part 12 of the injection head 13 is diffused by the first to third sound absorbing materials 134, 135, 136 housed in the internal space 140, and is gradually decompressed and expanded to reduce its flow rate. first, second, and third sound absorbing materials 134, 135, and 136 that absorb the vibrations of the extinguishing gas jet stream and emit them from the through hole 122b into the space within the extinguishing target section. do.
The present invention, as shown in FIG.
The jetting head 13 is
a cylindrical portion 167 connected to the end of the conduit 14, extending along the axis of this end, and having a plurality of nozzle holes 16 formed therethrough in the thickness direction;
It has an end wall part 165 that closes one axial end of the cylinder part 167 that is remote from the end of the conduit 14,
The silencer 17h is
(u) A first sound absorbing material 152,
It is formed into a cylindrical shape,
The cylindrical portion 167 of the injection head 13 is inserted,
a first sound absorbing material 152 having an inner circumferential surface that is in surface contact with an arcuate end surface around the outlet end of the nozzle hole 16, which is the outer circumferential surface of the cylindrical portion 167 of the injection head 13;
(v) a casing 150,
(v1) a cylindrical portion 157 that extends along the axis of the cylindrical portion 167 of the injection head 13 and surrounds the first sound absorbing material 152 at intervals in the radial direction;
(v2) a casing 150 having a casing end wall 159 that closes the cylindrical portion 157 near the end of the conduit 14 and is connected to the injection head 13;
(w) a second sound absorbing material 153 formed in a cylindrical shape, disposed along the inner circumferential surface of the cylindrical portion 157, and forming an annular space 170 between it and the outer circumferential surface of the first sound absorbing material 152;
(x) a third sound absorbing material 156 disposed at the end of the cylindrical portion 157 of the casing 150 remote from the end of the conduit 14, and discharging extinguishing gas from the annular space into the space within the extinguishing target section;
(y) These first, second and third sound absorbing materials 152, 153, 156 are
Has minute voids,
The extinguishing gas injected at high speed from the nozzle part 12 of the injection head 13 is diffused and gradually expanded under reduced pressure to lower its flow velocity and absorb the vibrations of the extinguishing gas jet stream.
The present invention
The silencer 17b; 17c; 17f; 17g; 17h is
The end surfaces 125c of the sound absorbing materials 40; 46; 125; 134; 46; 125; 134; 152 has fine voids,
The extinguishing gas injected at high speed from the nozzle hole 16 of the nozzle part 12 formed in the injection head 13 is diffused by the sound absorbing materials 40; 46; 125; 134; It is characterized by

本発明に従えば、消火ガス供給源から導管に供給された高圧の消火ガスは、噴射ヘッドを介して建物内の空間に向けて噴射される。このような噴射ヘッドには消音装置が設けられ、噴射ヘッドのノズル部から高速で噴射される消火ガスの噴射流に起因する大きな噴射音の発生を防止することができる。 According to the invention, the high pressure extinguishing gas supplied from the extinguishing gas supply source to the conduit is injected into the space within the building via the injection head. Such an ejection head is provided with a muffling device to prevent generation of large ejection noise caused by a jet stream of extinguishing gas ejected at high speed from a nozzle portion of the ejection head.

本発明によれば、噴射ヘッドに消音装置が設けられるので、火災発生時に噴射ヘッドのノズル部から消火ガスが噴射されても大きな噴射音が発生することを防止することができる。 According to the present invention, since the ejection head is provided with a silencer, it is possible to prevent loud ejection noise from being generated even if extinguishing gas is injected from the nozzle portion of the ejection head when a fire occurs.

本発明の実施の一形態のガス消火設備に備えられる消火ガス噴射部１１を示す斜視図である。It is a perspective view showing extinguishing gas injection part 11 with which the gas extinguishing equipment of one embodiment of the present invention is equipped. 消音装置１７の拡大断面図である。FIG. 3 is an enlarged cross-sectional view of the silencer 17. 本発明の一参考例のガス消火設備に備えられる消音装置１７ａを示す拡大断面図である。It is an enlarged cross-sectional view showing a silencer 17a provided in a gas fire extinguishing equipment according to a reference example of the present invention. 本発明の実施の他の形態のガス消火設備に備えられる消音装置１７ｂを示す拡大断面図である。It is an enlarged sectional view showing the silencer 17b with which the gas fire extinguishing equipment of other forms of implementation of this invention is equipped. 本発明の実施のさらに他の形態のガス消火設備に備えられる消音装置１７ｃを示す拡大断面図である。It is an enlarged cross-sectional view showing a silencer 17c provided in a gas fire extinguishing equipment according to still another embodiment of the present invention. 本発明の他の参考例のガス消火設備の噴射ヘッド５０を示す断面図である。It is a sectional view showing an injection head 50 of a gas fire extinguishing equipment according to another reference example of the present invention. 図６に示す噴射ヘッド５０による効果を説明するための断面図である。7 is a cross-sectional view for explaining the effect of the ejection head 50 shown in FIG. 6. FIG. 本発明のさらに他の参考例のガス消火設備に備えられる消音装置６０を示す拡大断面図である。It is an enlarged cross-sectional view showing a silencer 60 provided in a gas fire extinguishing equipment according to still another reference example of the present invention. 本発明のさらに他の参考例のガス消火設備に備えられる消音装置６０ａを示す拡大断面図である。It is an enlarged cross-sectional view showing a silencer 60a provided in a gas fire extinguishing equipment according to still another reference example of the present invention. 本発明のさらに他の参考例のガス消火設備に備えられる消音装置１７ｄを示す拡大断面図である。It is an enlarged sectional view showing 17d of silencers with which gas fire extinguishing equipment of still another reference example of the present invention is equipped. 消音装置１７ｄによる消音効果を説明するためのグラフである。It is a graph for explaining the silencing effect by the silencing device 17d. 本発明のさらに他の参考例のガス消火設備に備えられる消音装置１７ｅを示す拡大断面図である。It is an enlarged sectional view showing the silencer 17e with which the gas fire extinguishing equipment of still another reference example of the present invention is equipped. 本発明の実施のさらに他の形態のガス消火設備に備えられる消音装置１７ｆを示す拡大断面図である。It is an enlarged sectional view showing 17f of silencers with which gas fire extinguishing equipment of still another form of implementation of the present invention is equipped. 本発明の実施のさらに他の形態のガス消火設備に備えられる消音装置１７ｇを示す拡大断面図である。It is an expanded sectional view showing 17g of silencers with which gas fire extinguishing equipment of still another form of implementation of the present invention is equipped. 本発明の実施のさらに他の形態のガス消火設備に備えられる消音装置１７ｈを示す拡大断面図である。It is an enlarged sectional view showing 17 h of silencers with which gas fire extinguishing equipment of further another form of implementation of the present invention is equipped. 従来技術のガス消火設備で用いられる消火ガス噴射部１を示す斜視図である。FIG. 2 is a perspective view showing a fire extinguishing gas injection unit 1 used in conventional gas fire extinguishing equipment.

図１は、本発明の実施の一形態のガス消火設備に備えられる消火ガス噴射部１１を示す斜視図である。本実施形態のガス消火設備は、建物の消火対象区画内に設けられ、高圧の消火ガスを前記消火対象区画内の空間に向けて噴射するノズル部１２を有する噴射ヘッド１３と、噴射ヘッド１３が接続され、噴射ヘッド１３に高圧の消火ガスを導く導管１４と、導管１４に高圧の不活性ガスを供給する消火ガス供給源１５と、噴射ヘッド１３に設け
られ、ノズル部１２に形成されるノズル孔１６から噴射される消火ガスの噴射による噴射音などに起因して発生する音響を減衰させる消音装置１７とを含む。 FIG. 1 is a perspective view showing a fire extinguishing gas injection unit 11 provided in a gas fire extinguishing equipment according to an embodiment of the present invention. The gas fire extinguishing equipment of this embodiment is installed in a fire extinguishing target section of a building, and includes an injection head 13 having a nozzle section 12 that injects high-pressure extinguishing gas toward a space in the fire extinguishing target section; A conduit 14 that is connected and leads high-pressure extinguishing gas to the injection head 13, an extinguishing gas supply source 15 that supplies high-pressure inert gas to the conduit 14, and a nozzle provided in the injection head 13 and formed in the nozzle part 12. It includes a muffling device 17 that attenuates the sound generated due to the jetting noise caused by the jetting of the extinguishing gas jetted from the hole 16.

前記消火ガスは、Ｎ２ガスおよびＣＯ２ガスなどの不活性ガスまたはハロゲン化物ガスなどの活性ガスによって実現され、このような消火ガスを消火剤として放出することによって、消火対象区画内のＯ２濃度を低下させて消火することができる。 The extinguishing gas is realized by an inert gas such as N 2 gas and CO 2 gas or an active gas such as a halide gas, and by releasing such extinguishing gas as an extinguishing agent, the O 2 in the compartment to be extinguished is The fire can be extinguished by reducing the concentration.

前記噴射ヘッド１３と消音装置１７とによって、前記消火ガス噴射部１１を構成する。このような消火ガス噴射部１１には、消火ガス供給源１５から導管１４を経て噴射ヘッド１３に供給される。導管１４は、消火ガス供給源１５に接続される主管２３と、主管２３に介在される分岐管１８と、分岐管１８に接続される枝管１９とを含み、このような導管１４を経て消火ガス供給源１５からの高圧の消火ガスが前記噴射ヘッド１３に導かれる。導管１４は、基台２０およびブラケット２１にＵボルトなどの締結具２２によって締結され、振動および変位が抑制された状態で建物の躯体に設置されている。 The injection head 13 and the muffling device 17 constitute the extinguishing gas injection section 11 . Extinguishing gas is supplied to the extinguishing gas injection unit 11 from an extinguishing gas supply source 15 through a conduit 14 to the injection head 13 . The conduit 14 includes a main pipe 23 connected to a 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. High pressure extinguishing gas from a gas supply source 15 is guided to the injection head 13 . The conduit 14 is fastened to a base 20 and a bracket 21 with fasteners 22 such as U-bolts, and is installed in the building frame with vibration and displacement suppressed.

図２は、消音装置１７の拡大断面図である。前記消音装置１７は、円筒状の周壁２５と、周壁２５の軸線方向一端部に該周壁２５の軸線に垂直に形成される端壁２６と、周壁２５の軸線方向他端部に、噴射ヘッド１３に着脱可能に接続される取付け部２７と、周壁２５内にその内周面に沿って装着されて収容される円筒状の吸音材３３とを含む。このような吸音材３３としては、たとえばワイヤメッシュを複数積層して構成されてもよい。前記端壁２６には、同一軸線上にガス放出孔３４が形成される。 FIG. 2 is an enlarged sectional view of the silencer 17. The muffler 17 includes a cylindrical peripheral wall 25, an end wall 26 formed perpendicularly to the axis of the peripheral wall 25 at one end of the peripheral wall 25 in the axial direction, and an injection head 13 at the other end of the peripheral wall 25 in the axial direction. A cylindrical sound absorbing material 33 is installed and housed in the peripheral wall 25 along the inner circumferential surface of the peripheral wall 25. Such a sound absorbing material 33 may be constructed by laminating a plurality of wire meshes, for example. A gas discharge hole 34 is formed in the end wall 26 on the same axis.

このように構成される消音装置１７を用いることによって、噴射ヘッド１３のノズル部１２から高速で噴射された消火ガスの噴射流に起因する音響振動は、吸音材３３によって吸収され、ガス放出孔３４から外部へ放出される。これによって、消火ガスの噴射に起因する噴射音の発生を抑制することができる。 By using the silencer 17 configured in this manner, acoustic vibrations caused by the jet flow of extinguishing gas injected at high speed from the nozzle portion 12 of the injection head 13 are absorbed by the sound absorbing material 33, and released to the outside. This makes it possible to suppress the generation of injection noise caused by the injection of extinguishing gas.

図２の消音装置１７は、筒状の周壁２５と、周壁２５の軸線方向一端部に、該周壁２５の軸線に垂直に形成される端壁２６と、周壁２５の軸線方向他端部に、噴射ヘッド１３に着脱可能に形成される取付け部２７とを含む。端壁２６には、周壁２５の軸線上にガス放出孔３４が該端壁の厚み方向に貫通して形成される。周壁２５、端壁２６および取付け部２７によって規定される内部空間には、周壁２５の内周面に沿って装着された筒状の吸音材３３が収容される。 The silencer 17 of FIG. 2 includes a cylindrical peripheral wall 25, an end wall 26 formed perpendicularly to the axis of the peripheral wall 25 at one axial end of the peripheral wall 25, and an end wall 26 at the other axial end of the peripheral wall 25. A mounting portion 27 is formed to be detachably attached to the ejection head 13. A gas release hole 34 is formed in the end wall 26 on the axis of the peripheral wall 25 so as to penetrate through the end wall in the thickness direction. A cylindrical sound absorbing material 33 attached along the inner peripheral surface of the peripheral wall 25 is housed in the internal space defined by the peripheral wall 25, the end wall 26, and the attachment portion 27.

図３は、本発明の一参考例のガス消火設備に備えられる消音装置１７ａを示す拡大断面図である。なお、前述の実施形態に対応する部分には、同一の参照符を付す。本参考例の消音装置１７ａは、円筒状の周壁２５と、周壁２５の軸線方向一端部に該周壁２５の軸線に垂直に形成される端壁２６と、周壁２５の軸線方向他端部に、噴射ヘッド１３が一体的に形成される取付け部２７と、噴射ヘッド１３のノズル部１２における消火ガスの噴射方向下流側に臨む部分２８に設けられる内筒体２９とを含む。 FIG. 3 is an enlarged sectional view showing a silencer 17a provided in a gas fire extinguishing equipment according to a reference example of the present invention. Note that parts corresponding to the above-described embodiments are given the same reference numerals. The silencer 17a of this reference example includes a cylindrical peripheral wall 25, an end wall 26 formed perpendicularly to the axis of the peripheral wall 25 at one end of the peripheral wall 25 in the axial direction, and the other end of the peripheral wall 25 in the axial direction. It includes an attachment part 27 in which the ejection head 13 is integrally formed, and an inner cylindrical body 29 provided in a portion 28 of the nozzle part 12 of the ejection head 13 facing downstream in the injection direction of extinguishing gas.

内筒体２９は、複数の透孔３０が形成される直円筒状の筒状部３１と、筒状部３１の軸線方向一端部に、該筒状部３１の軸線に垂直に形成される端板３２とを有する。 The inner cylindrical body 29 includes a right cylindrical cylindrical part 31 in which a plurality of through holes 30 are formed, and an end perpendicular to the axis of the cylindrical part 31 at one end in the axial direction of the cylindrical part 31. It has a plate 32.

このような消音装置１７によって、噴射ヘッド１３のノズル部から高速で噴射された消火ガスは、内筒体２９内で、この内筒体２９の筒状の端板３２に衝突し、筒状部３１に形成される複数の透孔３０から放出された後、さらに筒状部３１と周壁２５との間の空間を経て、端壁２６に形成されるガス放出孔３４から外部へ放出され、消火ガス放出による音響の発生が抑制される。 The extinguishing gas injected at high speed from the nozzle part of the injection head 13 by such a silencer 17 collides with the cylindrical end plate 32 of the inner cylindrical body 29 within the inner cylindrical body 29, and the cylindrical part After the gas is released from the plurality of through holes 30 formed in the end wall 31, the gas is further passed through the space between the cylindrical part 31 and the peripheral wall 25, and then released to the outside from the gas release hole 34 formed in the end wall 26, extinguishing the gas. Sound generation due to gas release is suppressed.

図４は、本発明の実施の他の形態のガス消火設備に備えられる消音装置１７ｂを示す拡大断面図である。本実施形態の消音装置１７ｂは、円筒状の周壁３５と、周壁３５の軸線方向一端部に該周壁３５の軸線に垂直に形成される端壁３６と、周壁３５の軸線方向他端部に噴射ヘッド１３に着脱可能に形成される取付け部３７とを有する。端壁３６には、複数の通気孔３８が該端壁３６の厚み方向に貫通して形成される。 FIG. 4 is an enlarged sectional view showing a silencer 17b provided in a gas fire extinguishing equipment according to another embodiment of the present invention. The silencer 17b of the present embodiment includes a cylindrical peripheral wall 35, an end wall 36 formed perpendicularly to the axis of the peripheral wall 35 at one end of the peripheral wall 35 in the axial direction, and an end wall 36 formed at the other end of the peripheral wall 35 in the axial direction. The head 13 has an attachment portion 37 formed to be detachably attached to the head 13. A plurality of ventilation holes 38 are formed in the end wall 36 so as to pass through the end wall 36 in the thickness direction.

消音装置１７ｂはまた、周壁３５、端壁３６および取付け部３７によって規定される内部空間３９に、吸音材４０が収容される。この吸音材４０としては、ワイヤメッシュを複数積層して構成されてもよい。 In the silencer 17b, a sound absorbing material 40 is also accommodated in an internal space 39 defined by the peripheral wall 35, the end wall 36, and the attachment portion 37. The sound absorbing material 40 may be constructed by laminating a plurality of wire meshes.

図４の消音装置１７ｂは、（ｅ）ノズル孔１６の軸線に沿って延びる軸線を有する円筒状の周壁３５であって、ノズル孔１６の出口から消火ガスの噴射方向下流に拡がった内部空間３９を形成する周壁３５と、（ｆ）周壁３５の軸線方向のノズル部１２から遠ざかった一端部に形成される端壁３６であって、前記周壁３５とともに前記内部空間３９を規定し、この端壁３６には、複数の通気孔３８が該端壁３６の厚み方向に貫通して形成される端壁３６と、（ｇ）周壁３５の軸線方向のノズル部１２に近い他端部に形成され、噴射ヘッド１３に着脱可能に取付けられる取付け部３７と、（ｈ）前記内部空間３９に詰めて装填されて収容される吸音材４０であって、微細な空隙を有し、噴射ヘッド１３のノズル部１２から高速で噴射された消火ガスを、前記内部空間３９に収容された吸音材４０で拡散させて徐々に減圧膨張させてその流速を下げ、消火ガスの噴射流の振動を吸収し、前記通気孔３８から前記消火対象区画内の空間へ放出する吸音材４０とを含む。 The silencer 17b in FIG. 4 is (e) a cylindrical peripheral wall 35 having an axis extending along the axis of the nozzle hole 16, and an internal space 39 extending downstream from the outlet of the nozzle hole 16 in the injection direction of extinguishing gas. (f) an end wall 36 formed at one end of the peripheral wall 35 remote from the nozzle portion 12 in the axial direction, which defines the internal space 39 together with the peripheral wall 35; 36, a plurality of ventilation holes 38 are formed in the end wall 36 penetrating in the thickness direction of the end wall 36, and (g) formed in the other end near the nozzle part 12 in the axial direction of the peripheral wall 35, (h) a sound-absorbing material 40 packed and housed in the internal space 39, which has a minute gap and is attached to the nozzle part of the jet head 13; The extinguishing gas injected at high speed from the extinguishing gas 12 is diffused by the sound absorbing material 40 housed in the internal space 39 and gradually expanded under reduced pressure to lower its flow velocity, absorb the vibrations of the extinguishing gas jet flow, and and a sound absorbing material 40 emitted from the pores 38 into the space within the section to be extinguished.

このように構成される消音装置１７ａを備えるガス消火設備によって、噴射ヘッド１３のノズル部１２から高速で噴射された消火ガスは、周壁３５内の空間を経て端壁３６に衝突し、この端壁３６に形成される複数の通気孔３８から外部へ放出される。このような消音装置の構成によってもまた、大音響が発生することが防がれる。 The extinguishing gas injected at high speed from the nozzle part 12 of the injection head 13 by the gas extinguishing equipment equipped with the silencer 17a configured in this way passes through the space inside the peripheral wall 35 and collides with the end wall 36. The air is discharged to the outside from a plurality of ventilation holes 38 formed in 36. This configuration of the silencer also prevents loud noises from being generated.

図５は、本発明の実施のさらに他の形態のガス消火設備に備えられる消音装置１７ｃを示す拡大断面図である。なお、前述の実施形態に対応する部分には、同一の参照符を付す。本実施形態の消音装置１７ｃは、円筒状の周壁４１と、周壁４１の軸線方向一端部に該周壁４１の軸線に垂直に形成される端壁４２と、周壁４１の軸線方向他端部に、噴射ヘッド１３に着脱可能に形成される取付け部４３とを有する。周壁４１には、複数の通気孔４４が該周壁４１の厚み方向に貫通して形成される。 FIG. 5 is an enlarged sectional view showing a silencer 17c provided in a gas fire extinguishing equipment according to still another embodiment of the present invention. Note that parts corresponding to the above-described embodiments are given the same reference numerals. The silencer 17c of the present embodiment includes a cylindrical peripheral wall 41, an end wall 42 formed perpendicularly to the axis of the peripheral wall 41 at one end of the peripheral wall 41 in the axial direction, and the other end of the peripheral wall 41 in the axial direction. It has an attachment part 43 formed to be detachably attached to the ejection head 13. A plurality of ventilation holes 44 are formed in the peripheral wall 41 so as to pass through the peripheral wall 41 in the thickness direction.

このような消音装置１７ｃには、周壁４１、端壁４２および取付け部４３によって規定される内部空間４５に吸音材４６が収容される。この吸音材４６としては、たとえばワイヤメッシュを複数積層して構成されてもよい。 In such a silencer 17c, a sound absorbing material 46 is housed in an internal space 45 defined by the peripheral wall 41, the end wall 42, and the mounting portion 43. The sound absorbing material 46 may be constructed by laminating a plurality of wire meshes, for example.

図５の消音装置１７ｃは、（ｉ）導管１４の前記端部の軸線に沿って延びる軸線を有する円筒状の周壁４１であって、ノズル孔１６の出口から消火ガスの噴射方向下流で周壁４１の軸線に垂直に拡がった内部空間４５を形成し、複数の通気孔４４が分布して、該周壁４１の厚み方向に貫通して形成される周壁４１と、（ｊ）周壁４１の軸線方向のノズル部１２から遠ざかった一端部に、該周壁４１の軸線に垂直に形成され、前記周壁４１とともに内部空間４５を規定する端壁４２と、（ｋ）周壁４１の軸線方向のノズル部１２に近い他端部に形成される取付け部４３であって、噴射ヘッド１３のノズル部１２に、前記第２ねじによって、着脱可能である取付け部４３と、（ｌ）前記内部空間４５に隙間なく詰めて装填されて収容される吸音材４６であって、微細な空隙を有し、噴射ヘッド１３のノズル部１２から高速で噴射された消火ガスを、前記内部空間４５内で拡散させて徐々に減圧膨張させてその流速を下げ、消火ガスの噴射流の振動を吸収し、前記通気孔４４から前記消火対象区画内の空間へ放出する吸音材４６とを含む。 The silencer 17c in FIG. 5 includes (i) a cylindrical peripheral wall 41 having an axis extending along the axis of the end of the conduit 14, and the peripheral wall 41 located downstream from the outlet of the nozzle hole 16 in the injection direction of extinguishing gas; (j) an internal space 45 extending perpendicularly to the axis of the peripheral wall 41 with a plurality of ventilation holes 44 distributed therethrough, and (j) an internal space 45 extending perpendicularly to the axis of the peripheral wall 41; (k) an end wall 42 formed perpendicularly to the axis of the peripheral wall 41 and defining an internal space 45 together with the peripheral wall 41 at one end remote from the nozzle part 12; and (k) an end wall 42 near the nozzle part 12 in the axial direction of the peripheral wall 41. (l) an attachment part 43 formed at the other end, which is removably attached to the nozzle part 12 of the injection head 13 with the second screw; The sound-absorbing material 46 is loaded and housed, and has minute gaps, and the extinguishing gas injected at high speed from the nozzle portion 12 of the injection head 13 is diffused within the internal space 45 and gradually decompressed and expanded. and a sound absorbing material 46 that reduces the flow velocity of the fire extinguishing gas, absorbs vibrations of the extinguishing gas jet flow, and releases the vibrations from the ventilation hole 44 into the space within the fire extinguishing target section.

このように構成される消音装置１７ｃを備えるガス消火設備によって、噴射ヘッド１３のノズル部１２から噴射された消火ガスは、端壁４２に衝突してその流速が減衰し、周壁４１に形成される複数の通気孔４４から外部に放出される。これによって、消火ガスに噴射に起因して大きな音響が発生することが防がれる。 The extinguishing gas injected from the nozzle part 12 of the injection head 13 by the gas extinguishing equipment equipped with the silencer 17c configured in this manner collides with the end wall 42, its flow velocity is attenuated, and the extinguishing gas is formed on the peripheral wall 41. It is discharged to the outside from the plurality of ventilation holes 44. This prevents loud sounds from being generated due to the injection of extinguishing gas.

図６は、本発明のさらに他の参考例のガス消火設備の噴射ヘッド５０を示す断面図であり、図７は図６に示す噴射ヘッド５０による効果を説明するための断面図である。なお、前述の実施形態に対応する部分には、同一の参照符を付す。本参考例のガス消火設備は、建物内に設けられ、高圧の消火ガスを前記建物内の空間に向けて噴射するノズル部１２を有する噴射ヘッド５０と、噴射ヘッド５０が接続され、噴射ヘッド５０に高圧の消火ガスを導く導管１４と、導管１４に高圧の消火ガスを供給する消火ガス供給源１５とを含む。 FIG. 6 is a sectional view showing an injection head 50 of a gas fire extinguishing equipment according to still another reference example of the present invention, and FIG. 7 is a sectional view for explaining the effect of the injection head 50 shown in FIG. 6. Note that parts corresponding to the above-described embodiments are given the same reference numerals. The gas fire extinguishing equipment of this reference example is installed in a building, and the jet head 50 is connected to a jet head 50 having a nozzle section 12 that jets high-pressure fire extinguishing gas toward a space inside the building. It includes a conduit 14 that guides high-pressure extinguishing gas to the conduit 14, and an extinguishing gas supply source 15 that supplies high-pressure extinguishing gas to the conduit 14.

噴射ヘッド５０のノズル部１２には、前記導管１４の枝管１９の内周面５１に滑らかに連なる内周面５２を有するノズル孔１６が形成される。 The nozzle portion 12 of the injection head 50 is formed with a nozzle hole 16 having an inner circumferential surface 52 that smoothly connects to an inner circumferential surface 51 of the branch pipe 19 of the conduit 14 .

このように構成される噴射ヘッド５０を用いることによって、消火ガス供給源１５から導管１４に供給された高圧の消火ガスは、噴射ヘッド５０のノズル孔１６を介して建物内の空間に向けて噴射される。このとき、噴射ヘッド５０には導管１４の枝管１９の内周面５１に滑らかに連なる内周面５２を有するノズル孔１６が形成されるので、噴射ヘッド５０のノズル部１２から高速で噴射される消火ガスの噴射流、たとえば図７に示す噴射ヘッド５０ａにおいて、導管１４の枝管１９の内径Ｄ１よりも小さい内径Ｄ２のノズル孔１６の流入口に臨むエッジ部５５などに起因する大きな噴射音の発生を防止することができる。 By using the injection head 50 configured in this manner, the high-pressure extinguishing gas supplied from the extinguishing gas supply source 15 to the conduit 14 is injected into the space inside the building through the nozzle hole 16 of the injection head 50. be done. At this time, the nozzle hole 16 having the inner circumferential surface 52 smoothly connected to the inner circumferential surface 51 of the branch pipe 19 of the conduit 14 is formed in the ejection head 50, so that the nozzle part 12 of the ejection head 50 can eject at high speed. For example, in the injection head 50a shown in FIG. 7, a large injection noise is caused by the edge portion 55 facing the inlet of the nozzle hole 16, which has an inner diameter D2 smaller than the inner diameter D1 of the branch pipe 19 of the conduit 14. can be prevented from occurring.

図８は、本発明のさらに他の参考例のガス消火設備に備えられる消音装置６０を示す拡大断面図である。なお、前述の実施形態に対応する部分には、同一の参照符を付す。本参考例の消音装置６０は、円筒状の周壁６１と、周壁６１の軸線方向一端部に、枝管１９に着脱可能に形成される取付け部６２と、周壁６１の軸線方向他端部に、噴射ヘッド１３に着脱可能に形成される取付け部６３と、前記一端部に該周壁６１の軸線に垂直に形成される端壁６４と、前記他端部に該周壁６１の軸線に垂直に形成される端壁６５とを有する。 FIG. 8 is an enlarged sectional view showing a silencer 60 provided in a gas fire extinguishing equipment according to still another reference example of the present invention. Note that parts corresponding to the above-described embodiments are given the same reference numerals. The silencer 60 of this reference example includes a cylindrical peripheral wall 61, an attachment part 62 formed at one end of the peripheral wall 61 in the axial direction to be detachably attached to the branch pipe 19, and the other end of the peripheral wall 61 in the axial direction. an attachment part 63 formed to be removably attached to the ejection head 13; an end wall 64 formed perpendicular to the axis of the peripheral wall 61 at the one end; and an end wall 64 formed perpendicular to the axis of the peripheral wall 61 at the other end. and an end wall 65.

端壁６４には、少なくとも１つの透孔６６が該端壁６４の厚み方向に貫通して形成される。少なくとも１つの透孔６６は、周壁６１の軸線を中心として該端壁６４の中央部６８に形成され、枝管１９から供給される消火ガスの流量を絞る。端壁６５には、複数の透孔６７が該端壁６５の厚み方向に貫通して形成される。複数の透孔６７は、周壁６１の軸線を中心として該端壁６５の中央部６９を除く残余の周辺部７０に形成される。端壁６４，６５は、たとえばパンチングメタルによって構成される。 At least one through hole 66 is formed in the end wall 64 so as to pass through the end wall 64 in the thickness direction thereof. At least one through hole 66 is formed in the central portion 68 of the end wall 64 around the axis of the peripheral wall 61 to throttle the flow rate of the extinguishing gas supplied from the branch pipe 19. A plurality of through holes 67 are formed in the end wall 65 so as to pass through the end wall 65 in the thickness direction. A plurality of through holes 67 are formed in the remaining peripheral portion 70 of the end wall 65 excluding the central portion 69 around the axis of the peripheral wall 61 . The end walls 64 and 65 are made of punched metal, for example.

このような消音装置６０によって、端壁６４に形成される透孔６６から高速で噴射された消火ガスは、消音装置６０内で、端壁６５の中央部６９に衝突してその流速が減衰し、端壁６５に形成される複数の透孔６７から、端壁６５と噴射ヘッド１３とで規定される空間内に放出された後、ノズル部１２に形成されるノズル孔１６から外部へ放出される。消音装置６０は、端壁６４に形成される透孔６６から高速で噴射された消火ガスを消音装置６０内の空間で膨張させることによって、端壁６５に形成される透孔６７での流速を下げるので、ノズル孔１６からの消火ガス放出による音響の発生が抑制される。 With such a silencer 60, the extinguishing gas injected at high speed from the through hole 66 formed in the end wall 64 collides with the center portion 69 of the end wall 65 within the silencer 60, and its flow velocity is attenuated. , is discharged from a plurality of through holes 67 formed in the end wall 65 into a space defined by the end wall 65 and the injection head 13, and then discharged to the outside from the nozzle hole 16 formed in the nozzle part 12. Ru. The muffler 60 expands extinguishing gas injected at high speed from the through holes 66 formed in the end wall 64 in the space inside the muffler 60, thereby reducing the flow velocity in the through holes 67 formed in the end wall 65. Since the nozzle hole 16 is lowered, the generation of sound due to extinguishing gas discharged from the nozzle hole 16 is suppressed.

図８に示した参考例では、端壁６５の中央部６９に透孔６７を形成していないが、端壁６５の中央部６９に透孔６７を形成してもよい。端壁６５の中央部６９に透孔６７を形成していない場合の方が、端壁６５の中央部６９に透孔６７を形成する場合よりも、透孔６
６から高速で噴射された消火ガスを跳ね返す量が多く、より流速を下げるので、消音効果は高い。 In the reference example shown in FIG. 8, the through hole 67 is not formed in the central portion 69 of the end wall 65, but the through hole 67 may be formed in the central portion 69 of the end wall 65. The case where the through hole 67 is not formed in the central part 69 of the end wall 65 is better than the case where the through hole 67 is formed in the central part 69 of the end wall 65.
Since a large amount of the extinguishing gas injected at high speed from No. 6 is bounced back and the flow velocity is further lowered, the silencing effect is high.

図９は、本発明のさらに他の参考例のガス消火設備に備えられる消音装置６０ａを示す拡大断面図である。なお、前述の実施形態に対応する部分には、同一の参照符を付す。本参考例の消音装置６０ａは、円筒状の周壁６１と、周壁６１の軸線方向一端部に、枝管１９に着脱可能に形成される取付け部６２と、周壁６１の軸線方向他端部に、噴射ヘッド１３に着脱可能に形成される取付け部６３と、前記一端部に該周壁６１の軸線に垂直に形成される端壁６４ａと、前記他端部に該周壁６１の軸線に垂直に形成される端壁６５とを有する。 FIG. 9 is an enlarged sectional view showing a silencer 60a provided in a gas fire extinguishing equipment according to still another reference example of the present invention. Note that parts corresponding to the above-described embodiments are given the same reference numerals. The silencer 60a of this reference example includes a cylindrical peripheral wall 61, an attachment portion 62 formed at one end of the peripheral wall 61 in the axial direction, which is removably attached to the branch pipe 19, and the other end of the peripheral wall 61 in the axial direction. an attachment part 63 that is removably formed on the ejection head 13; an end wall 64a formed perpendicular to the axis of the peripheral wall 61 at the one end; and an end wall 64a formed perpendicular to the axis of the peripheral wall 61 at the other end. and an end wall 65.

端壁６４ａには、枝管１９から供給される高圧の消火ガスを、周壁６１および端壁６４ａ，６５によって規定される内部空間に噴出する複数のノズル孔７１を有する案内部７２が、周壁６１の軸線上に該内部空間に臨んで形成される。案内部７２の複数のノズル孔７１は、周壁６１の軸線に直交する軸線上に、周壁６１の軸線に関して周方向に等角度で間隔をあけて形成される。端壁６５には、複数の透孔６７が該端壁６５の厚み方向に貫通して形成される。複数の透孔６７は、周壁６１の軸線を中心として該端壁６５の中央部６９を除く残余の周辺部７０に形成される。端壁６５は、たとえばパンチングメタルによって構成される。図９に示した参考例では、端壁６５の中央部６９に透孔６７を形成していないが、端壁６５の中央部６９に透孔６７を形成してもよい。 A guide portion 72 having a plurality of nozzle holes 71 for spouting high-pressure extinguishing gas supplied from the branch pipe 19 into the internal space defined by the peripheral wall 61 and the end walls 64a and 65 is provided in the end wall 64a. The inner space is formed on the axis of the inner space. The plurality of nozzle holes 71 of the guide portion 72 are formed on an axis perpendicular to the axis of the peripheral wall 61 and spaced apart at equal angles in the circumferential direction with respect to the axis of the peripheral wall 61. A plurality of through holes 67 are formed in the end wall 65 so as to pass through the end wall 65 in the thickness direction. A plurality of through holes 67 are formed in the remaining peripheral portion 70 of the end wall 65 excluding the central portion 69 around the axis of the peripheral wall 61 . The end wall 65 is made of, for example, punched metal. In the reference example shown in FIG. 9, the through hole 67 is not formed in the central portion 69 of the end wall 65, but the through hole 67 may be formed in the central portion 69 of the end wall 65.

このような消音装置６０ａによって、端壁６４ａに形成される案内部７２のノズル孔７１から高速で噴射された消火ガスは、消音装置６０ａ内で、周壁６１の内周面に衝突してその流速が減衰し、端壁６５に形成される複数の透孔６７から、端壁６５と噴射ヘッド１３とで規定される空間内に放出された後、ノズル部１２に形成されるノズル孔１６から外部へ放出される。消音装置６０ａは、ノズル孔７１から高速で噴射された消火ガスを消音装置６０内の空間で膨張させることによって、端壁６５に形成される透孔６７での流速を下げるので、ノズル孔１６からの消火ガス放出による音響の発生が抑制される。 With such a silencer 60a, the extinguishing gas injected at high speed from the nozzle hole 71 of the guide portion 72 formed in the end wall 64a collides with the inner circumferential surface of the peripheral wall 61 within the silencer 60a, and its flow velocity is reduced. is attenuated and discharged from the plurality of through holes 67 formed in the end wall 65 into the space defined by the end wall 65 and the jetting head 13, and then released from the nozzle hole 16 formed in the nozzle part 12 to the outside. released to. The silencer 60a reduces the flow velocity in the through hole 67 formed in the end wall 65 by expanding the extinguishing gas injected at high speed from the nozzle hole 71 in the space inside the silencer 60. The generation of sound caused by the release of extinguishing gas is suppressed.

図１０は、本発明のさらに他の参考例のガス消火設備に備えられる消音装置１７ｄを示す拡大断面図である。消音装置１７ｄは、たとえば消火対象区画の壁面に設けられる噴射ヘッド１３に取付けられて好適に使用される。 FIG. 10 is an enlarged sectional view showing a silencer 17d provided in a gas fire extinguishing equipment according to still another reference example of the present invention. The silencer 17d is suitably used, for example, by being attached to the jet head 13 provided on the wall of the section to be extinguished.

なお、前述の実施形態に対応する部分には、同一の参照符を付す。本参考例の前記消音装置１７ｄは、円筒状の周壁８１と、周壁８１の軸線方向一端部に該周壁８１の軸線に垂直に形成される端壁８２と、噴射ヘッド１３に着脱可能に形成される取付け部８３を有し、周壁８１の軸線方向他端部に該周壁８１の軸線に垂直に形成される端壁８４と、端壁８２と端壁８４との間に、周壁８１の軸線に垂直に形成される障壁８５と、噴射ヘッド１３から噴射される消火ガスを、周壁８１、端壁８２および障壁８５によって規定される内部空間である消音室８６に導く円筒状の導通管８７と、周壁８１、端壁８４および障壁８５によって規定される内部空間である消音室８８内の消火ガスを消音装置１７ｄの外部に導く円筒状の通気管８９とを含む。 Note that parts corresponding to the above-described embodiments are given the same reference numerals. The muffling device 17d of this reference example includes a cylindrical peripheral wall 81, an end wall 82 formed perpendicularly to the axis of the peripheral wall 81 at one end in the axial direction of the peripheral wall 81, and detachably attached to the injection head 13. an end wall 84 formed perpendicularly to the axis of the peripheral wall 81 at the other end in the axial direction of the peripheral wall 81; a vertically formed barrier 85; a cylindrical conduction pipe 87 that guides the extinguishing gas injected from the injection head 13 to a silencing chamber 86, which is an internal space defined by the peripheral wall 81, the end wall 82, and the barrier 85; It includes a cylindrical ventilation pipe 89 that guides extinguishing gas in a muffling chamber 88, which is an internal space defined by a peripheral wall 81, an end wall 84, and a barrier 85, to the outside of the muffling device 17d.

周壁８１、端壁８２および端壁８４は、たとえば消音材によって構成される。障壁８５には、複数の透孔８５１が該障壁８５の厚み方向に貫通して形成される。障壁８５は、たとえばパンチングメタルによって構成される。 The peripheral wall 81, the end wall 82, and the end wall 84 are made of, for example, a sound deadening material. A plurality of through holes 851 are formed in the barrier 85 so as to pass through the barrier 85 in the thickness direction. The barrier 85 is made of punched metal, for example.

導通管８７は、障壁８５を貫通し、消音室８６に突き出して配置される。導通管８７には、導通管８７の軸線方向一端部に噴射ヘッド１３に着脱可能に連結される連結部８７１が形成され、導通管８７の軸線方向他端部に端板８７２が形成される。導通管８７の周壁
のうち消音室８６に突き出された部分８７３には、複数の透孔８７４が導通管８７の周壁の厚み方向に貫通して形成される。導通管８７のうち複数の透孔８７４が形成される部分８７３は、たとえばパンチングメタルによって構成される。通気管８９は、障壁８５および端壁８２を貫通して配置され、消音室８８側の開口部に金網８９１が設けられ、外部への開口部である消火ガス噴射口８９２から消火ガスを噴射する。通気管８９の材料は、たとえば塩化ビニールである。 The conduit pipe 87 is arranged to penetrate the barrier 85 and protrude into the muffling chamber 86 . The conduction tube 87 has a connecting portion 871 that is removably connected to the injection head 13 at one end in the axial direction of the conduction tube 87, and an end plate 872 at the other end in the axial direction of the conduction tube 87. A plurality of through holes 874 are formed in a portion 873 of the circumferential wall of the conduit tube 87 that protrudes into the silencing chamber 86 so as to penetrate in the thickness direction of the circumferential wall of the conduit tube 87 . A portion 873 of the conduction tube 87 in which the plurality of through holes 874 are formed is made of, for example, punched metal. The ventilation pipe 89 is arranged to pass through the barrier 85 and the end wall 82, a wire mesh 891 is provided at the opening on the silencing room 88 side, and extinguishing gas is injected from the extinguishing gas injection port 892 which is the opening to the outside. . The material of the ventilation pipe 89 is, for example, vinyl chloride.

このような消音装置１７ｄによって、導通管８７に形成される複数の透孔８７４から高速で消音室８６に噴射された消火ガスは、障壁８５に形成される複数の透孔８５１から消音室８８に放出される。透孔８５１から消音室８８に放出された消火ガスは、通気管８９を介して消音装置１７ｄの外部へ放出される。消音装置１７ｄは、複数の透孔８７４から高速で噴射された消火ガスを消音室８６内の空間および消音室８８内の空間で膨張させることによって、通気管８９での流速を下げるので、通気管８９からの消火ガス放出による音響の発生が抑制される。 With such a silencer 17d, the extinguishing gas injected into the silencing chamber 86 at high speed from the plurality of through holes 874 formed in the conduit pipe 87 enters the silencing chamber 88 through the plurality of through holes 851 formed in the barrier 85. released. The extinguishing gas discharged from the through hole 851 into the muffling chamber 88 is discharged to the outside of the muffler 17d via the vent pipe 89. The muffling device 17d expands the extinguishing gas injected at high speed from the plurality of through holes 874 in the space inside the muffling chamber 86 and the space inside the muffling chamber 88, thereby lowering the flow velocity in the vent pipe 89. The generation of sound due to the extinguishing gas discharged from 89 is suppressed.

Figure 0007344240000001
Figure 0007344240000001

表１は、消音装置１７ｄを用いたガス消火設備の実施例１，２についての圧力および流速の計算例を示す。実施例１は、消音装置１７ｄの通気管８９の穴径が５０ｍｍであり、実施例２は、消音装置１７ｄの通気管８９の穴径が８０ｍｍである。圧力は、消音室８６の圧力であり、流速（ｍ／ｓ）は、通気管８９の消火ガス噴射口８９２での流速である。 Table 1 shows calculation examples of pressure and flow rate for Examples 1 and 2 of the gas fire extinguishing equipment using the silencer 17d. In Example 1, the hole diameter of the ventilation pipe 89 of the silencer 17d is 50 mm, and in Example 2, the hole diameter of the ventilation pipe 89 of the silencer 17d is 80 mm. The pressure is the pressure in the muffling chamber 86, and the flow velocity (m/s) is the flow velocity at the extinguishing gas injection port 892 of the ventilation pipe 89.

２気圧の消火ガスを１気圧の大気中に噴射するときの流速は、約３４０ｍ／ｓであり、大音響が発生する。消音室８６内の圧力を下げることによって、消火ガス噴射口８９２での流速を下げて、音量を下げることができる。実施例１では、消音室８６内の圧力が約１．５気圧であり、消火ガス噴射口８９２での流速は、約２５０（ｍ／ｓ）である。実施例２では、消音室８６内の圧力が約１．１気圧であり、消火ガス噴射口８９２での流速は、約１００（ｍ／ｓ）である。 When extinguishing gas of 2 atmospheres is injected into the atmosphere of 1 atmosphere, the flow velocity is approximately 340 m/s, and a loud noise is generated. By lowering the pressure inside the muffling chamber 86, the flow velocity at the extinguishing gas injection port 892 can be lowered, and the sound volume can be lowered. In Example 1, the pressure inside the muffling chamber 86 is about 1.5 atm, and the flow velocity at the extinguishing gas injection port 892 is about 250 (m/s). In Example 2, the pressure inside the muffling chamber 86 is about 1.1 atm, and the flow velocity at the extinguishing gas injection port 892 is about 100 (m/s).

図１１は、消音装置１７ｄによる消音効果を説明するためのグラフである。縦軸が音圧（ｄＢ）であり、横軸がノズル部１２からの距離（ｍ）である。グラフ９１が消音装置を用いない場合のグラフであり、グラフ９２が実施例１の場合のグラフであり、グラフ９３が実施例２の場合のグラフである。 FIG. 11 is a graph for explaining the silencing effect of the silencing device 17d. The vertical axis is the sound pressure (dB), and the horizontal axis is the distance (m) from the nozzle section 12. Graph 91 is a graph when no muffling device is used, graph 92 is a graph when the first embodiment is used, and graph 93 is a graph when the second embodiment is used.

ノズル部１２からの距離が２（ｍ）の位置では、消音装置を用いない場合、音圧は約１２５ｄＢであるが、実施例１では、音圧は約１０５ｄＢまで下がり、実施例２では、音圧は約１００ｄＢまで下がっている。同様に、ノズル部１２からの距離が１０（ｍ）の位置では、消音装置を用いない場合、音圧は約１１５ｄＢであるが、実施例１では、音圧は約９６ｄＢまで下がり、実施例２では、音圧は約９２ｄＢまで下がっている。すなわち、消音装置を用いない場合に比べて、実施例１では、音圧を約２０ｄＢ下げることができ、実施例２では、音圧を約２５ｄＢ下げることができる。 At a position 2 (m) away from the nozzle section 12, the sound pressure is approximately 125 dB if no muffler is used, but in Example 1, the sound pressure decreases to approximately 105 dB, and in Example 2, the sound pressure is approximately 125 dB. The pressure has dropped to about 100dB. Similarly, at a position at a distance of 10 (m) from the nozzle section 12, the sound pressure is about 115 dB if no muffling device is used, but in Example 1, the sound pressure decreases to about 96 dB, and in Example 2, the sound pressure is about 115 dB. In this case, the sound pressure has decreased to about 92 dB. That is, compared to the case where no muffler is used, the sound pressure can be lowered by about 20 dB in Example 1, and the sound pressure can be lowered by about 25 dB in Example 2.

図１２は、本発明のさらに他の参考例のガス消火設備に備えられる消音装置１７ｅを示す拡大断面図である。消音装置１７ｅは、たとえば消火対象区画の天井に設けられる噴射
ヘッド１３に取付けられて好適に使用される。なお、前述の実施形態に対応する部分には、同一の参照符を付す。本参考例の前記消音装置１７ｅは、円筒状の周壁８１と、周壁８１の軸線方向一端部に該周壁８１の軸線に垂直に形成される端壁８２と、噴射ヘッド１３に着脱可能に形成される取付け部８３を有し、周壁８１の軸線方向他端部に該周壁８１の軸線に垂直に形成される端壁８４と、端壁８２と端壁８４との間に、周壁８１の軸線に垂直に形成される障壁８５と、噴射ヘッド１３から噴射される消火ガスを、周壁８１、端壁８２および障壁８５によって規定される内部空間である消音室８６に導く円筒状の導通管８７と、周壁８１、端壁８４および障壁８５によって規定される内部空間である消音室８８内の消火ガスを消音装置１７ｅの外部に導く円筒状の複数の通気管８９ａとを含む。 FIG. 12 is an enlarged sectional view showing a silencer 17e provided in a gas fire extinguishing equipment according to still another reference example of the present invention. The silencer 17e is suitably used by being attached to, for example, a jetting head 13 provided on the ceiling of a section to be extinguished. Note that parts corresponding to the above-described embodiments are given the same reference numerals. The muffling device 17e of this reference example includes a cylindrical peripheral wall 81, an end wall 82 formed at one end of the peripheral wall 81 in the axial direction perpendicular to the axis of the peripheral wall 81, and a removably attached to the injection head 13. an end wall 84 formed perpendicularly to the axis of the peripheral wall 81 at the other end in the axial direction of the peripheral wall 81; a vertically formed barrier 85; a cylindrical conduction pipe 87 that guides the extinguishing gas injected from the injection head 13 to a silencing chamber 86, which is an internal space defined by the peripheral wall 81, the end wall 82, and the barrier 85; It includes a plurality of cylindrical ventilation pipes 89a that guide the extinguishing gas in the muffler chamber 88, which is an internal space defined by the peripheral wall 81, the end wall 84, and the barrier 85, to the outside of the muffler 17e.

周壁８１、端壁８２および端壁８４は、たとえば消音材によって構成される。障壁８５には、複数の透孔８５１が該障壁８５の厚み方向に貫通して形成される。障壁８５は、たとえばパンチングメタルによって構成される。 The peripheral wall 81, the end wall 82, and the end wall 84 are made of, for example, a sound deadening material. A plurality of through holes 851 are formed in the barrier 85 so as to pass through the barrier 85 in the thickness direction. The barrier 85 is made of punched metal, for example.

導通管８７は、障壁８５を貫通し、消音室８６に突き出して配置される。導通管８７には、導通管８７の軸線方向一端部に噴射ヘッド１３に着脱可能に連結される連結部８７１が形成され、導通管８７の軸線方向他端部に端板８７２が形成される。導通管８７の周壁のうち消音室８６に突き出された部分８７３には、複数の透孔８７４が導通管８７の周壁の厚み方向に貫通して形成される。導通管８７のうち複数の透孔８７４が形成される部分８７３は、たとえばパンチングメタルによって構成される。複数の通気管８９ａは、周壁８１の軸線に直交する軸線上に、周壁８１の軸線に関して周方向に等角度で間隔をあけて配置され、それぞれ周壁８１を貫通して形成される。各通気管８９ａには、消音装置１７ｅの外部への開口部である消火ガス噴射口８９２ａが形成され、消火ガスをそれぞれの消火ガス噴射口８９２ａから消音装置１７ｅの外部に噴射する。通気管８９ａの材料は、たとえば塩化ビニールである。 The conduit pipe 87 is arranged to penetrate the barrier 85 and protrude into the muffling chamber 86 . The conduction tube 87 has a connecting portion 871 that is removably connected to the injection head 13 at one end in the axial direction of the conduction tube 87, and an end plate 872 at the other end in the axial direction of the conduction tube 87. A plurality of through holes 874 are formed in a portion 873 of the circumferential wall of the conduit tube 87 that protrudes into the silencing chamber 86 so as to penetrate in the thickness direction of the circumferential wall of the conduit tube 87 . A portion 873 of the conduction tube 87 in which the plurality of through holes 874 are formed is made of, for example, punched metal. The plurality of ventilation pipes 89a are arranged on an axis perpendicular to the axis of the peripheral wall 81 at equal angles in the circumferential direction with respect to the axis of the peripheral wall 81, and are formed to penetrate through the peripheral wall 81, respectively. A fire extinguishing gas injection port 892a, which is an opening to the outside of the silencer 17e, is formed in each ventilation pipe 89a, and extinguishing gas is injected to the outside of the silencer 17e from each of the fire extinguishing gas injection holes 892a. The material of the ventilation pipe 89a is, for example, vinyl chloride.

このような消音装置１７ｅによって、導通管８７に形成される複数の透孔８７４から高速で消音室８６に噴射された消火ガスは、障壁８５に形成される複数の透孔８５１から消音室８８に放出される。透孔８５１から消音室８８に放出された消火ガスは、通気管８９ａを介して消音装置１７ｅの外部へ放出される。消音装置１７ｅは、複数の透孔８７４から高速で噴射された消火ガスを消音室８６内の空間および消音室８８内の空間で膨張させることによって、通気管８９ａでの流速を下げるので、通気管８９ａからの消火ガス放出による音響の発生が抑制される。 With such a silencer 17e, the extinguishing gas injected into the silencing chamber 86 at high speed from the plurality of through holes 874 formed in the conduit pipe 87 enters the silencing chamber 88 through the plurality of through holes 851 formed in the barrier 85. released. The extinguishing gas discharged from the through hole 851 into the muffling chamber 88 is discharged to the outside of the muffler 17e via the vent pipe 89a. The silencer 17e expands the extinguishing gas injected at high speed from the plurality of through holes 874 in the space within the silencing chamber 86 and the space within the silencing chamber 88 to reduce the flow velocity in the vent pipe 89a. The generation of sound due to the extinguishing gas discharged from 89a is suppressed.

図１３は、本発明の実施のさらに他の形態のガス消火設備に備えられる消音装置１７ｆを示す拡大断面図である。なお、前述の実施形態に対応する部分には、同一の参照符を付す。消音装置１７ｆは、たとえば消火対象区画の壁面に設けられる噴射ヘッド１３に取付けられて好適に使用される。 FIG. 13 is an enlarged sectional view showing a silencer 17f provided in a gas fire extinguishing equipment according to still another embodiment of the present invention. Note that parts corresponding to the above-described embodiments are given the same reference numerals. The silencer 17f is suitably used, for example, by being attached to the jet head 13 provided on the wall of the section to be extinguished.

本実施形態の消音装置１７ｆは、筒状の周壁１２１と、周壁１２１の軸線方向一端部に該周壁１２１の軸線に垂直に形成される環状の端壁１２２と、周壁１２１の軸線方向他端部に形成され、噴射ヘッド１３に着脱可能に形成される取付け部１２３とを有する。消音装置１７ｆには、噴射ヘッド１３、周壁１２１および端壁１２２によって規定される内部空間である消音室１２４が形成される。この消音室１２４には、柱状の吸音材１２５が、周壁１２１の内周面に沿って装着されて収容される。前記周壁１２１、端壁１２２および取付け部１２３を含んでケーシング１２９を構成する。 The silencer 17f of this embodiment includes a cylindrical peripheral wall 121, an annular end wall 122 formed perpendicularly to the axis of the peripheral wall 121 at one axial end of the peripheral wall 121, and the other axial end of the peripheral wall 121. and a mounting portion 123 that is formed to be detachably attached to the ejection head 13. A muffling chamber 124, which is an internal space defined by the ejection head 13, the peripheral wall 121, and the end wall 122, is formed in the muffling device 17f. A columnar sound absorbing material 125 is mounted and housed in the sound deadening chamber 124 along the inner circumferential surface of the peripheral wall 121 . A casing 129 includes the peripheral wall 121, the end wall 122, and the mounting portion 123.

前記ケーシング１２９の消音室１２４に臨む周壁１２１の内周面１２１ａは、筒状に形成され、消音室１２４に臨む端壁１２２の内面１２２ａは、周壁１２１の軸線Ｌ１２１に垂直な仮想一平面上に形成される。端壁１２２には、周壁１２１の軸線Ｌ１２１を中心軸
線とする透孔１２２ｂが、該軸線Ｌ１２１方向に貫通して形成される。 The inner circumferential surface 121a of the peripheral wall 121 facing the muffling chamber 124 of the casing 129 is formed into a cylindrical shape, and the inner surface 122a of the end wall 122 facing the muffling chamber 124 lies on a virtual plane perpendicular to the axis L121 of the circumferential wall 121. It is formed. A through hole 122b whose central axis is the axis L121 of the peripheral wall 121 is formed in the end wall 122 so as to penetrate in the direction of the axis L121.

吸音材１２５は、柱状であって、その外周面１２５ａは筒状に形成され、吸音材１２５の軸線Ｌ１２５方向一方側の端面１２５ｂおよび他方側の端面１２５ｃが、該軸線Ｌ１２５に垂直な仮想一平面上に形成される。噴射ヘッド１３のノズル部１２における消火ガスの噴射方向下流側の端面１２ａは、ノズル部１２の軸線Ｌ１２に垂直な仮想一平面上に形成される。 The sound absorbing material 125 has a columnar shape, an outer circumferential surface 125a thereof is formed in a cylindrical shape, and an end surface 125b on one side and an end surface 125c on the other side in the direction of the axis L125 of the sound absorbing material 125 form a virtual plane perpendicular to the axis L125. formed on top. An end surface 12a of the nozzle portion 12 of the ejection head 13 on the downstream side in the extinguishing gas injection direction is formed on one imaginary plane perpendicular to the axis L12 of the nozzle portion 12.

消音装置１７ｆは、吸音材１２５を、その軸線Ｌ１２５が周壁１２１の軸線Ｌ１２１に一致または略一致するような姿勢で、取付け部１２３側からケーシング１２９内の空間に装填される。例えば、吸音材１２５が直円筒状の場合、取付け部１２３の内周部に刻設された内ねじに対して、ノズル部１２における消火ガスの噴射方向下流側の外周部に刻設された外ねじを螺合させることによって着脱可能に構成される。消音装置１７ｆにおいて、吸音材１２５は、一方の端面１２５ｂと端壁１２２の内面１２２ａとが面接触し、かつ他方の端面１２５ｃとノズル部１２の端面１２ａとが面接触した状態で、消音室１２４に収容される。すなわち、吸音材１２５は、消音室１２４に隙間なく詰まっている。 In the silencer 17f, the sound absorbing material 125 is loaded into the space in the casing 129 from the mounting portion 123 side in such a posture that the axis L125 of the sound absorbing material 125 coincides with or substantially coincides with the axis L121 of the peripheral wall 121. For example, when the sound absorbing material 125 has a right cylindrical shape, an inner thread carved on the inner peripheral part of the mounting part 123 is opposed to an outer thread carved on the outer peripheral part on the downstream side of the extinguishing gas injection direction in the nozzle part 12. It is configured to be detachable by screwing together the screws. In the sound damping device 17f, the sound absorbing material 125 is placed in the sound damping chamber 124 with one end surface 125b in surface contact with the inner surface 122a of the end wall 122, and with the other end surface 125c in surface contact with the end surface 12a of the nozzle part 12. be accommodated in. That is, the sound absorbing material 125 is packed tightly in the sound deadening chamber 124.

本実施形態では、透孔１２２ｂの孔径は有効に消火剤が放出できる大きさに形成される。また、透孔１２２ｂの有効な孔径部分は、端壁面側だけでなく、周壁面側にあってもよい。周壁面側に有効な孔径部分を設けることによって、単壁面側の部分の有効面積を小さくすることができるため、消音装置１７ｆを小型化することができる。また、吸音材１２５をケーシング１２９内の空間に隙間なく装填することによっても、消音装置１７ｆの小型化を図ることができる。 In this embodiment, the hole diameter of the through hole 122b is formed to a size that allows the extinguishing agent to be effectively released. Further, the effective hole diameter portion of the through hole 122b may be located not only on the end wall side but also on the peripheral wall side. By providing an effective hole diameter portion on the side of the peripheral wall, the effective area of the portion on the single wall side can be reduced, so that the silencer 17f can be downsized. Furthermore, by loading the sound absorbing material 125 into the space within the casing 129 without leaving any gaps, it is possible to downsize the sound muffling device 17f.

吸音材１２５は、柱状の空隙が連続した多孔質の金属から成る。このような吸音材１２５をノズル孔１６の直後に設けることによって、消音装置１７ｆは、枝管１９側から供給される消火ガスを徐々に減圧膨張し、その流速を下げることができる。これによって、消火ガスの噴射に起因する噴射音の発生を抑制することができる。 The sound absorbing material 125 is made of porous metal with continuous columnar voids. By providing such a sound absorbing material 125 immediately after the nozzle hole 16, the muffling device 17f can gradually decompress and expand the extinguishing gas supplied from the branch pipe 19 side, and lower the flow rate. This makes it possible to suppress the generation of injection noise caused by the injection of extinguishing gas.

詳細には、吸音材１２５が消音室１２４に隙間なく詰められているので、ノズル孔１６から放出される消火ガスを、吸音材１２５である多孔質の金属内へ直接流入させることができるとともに、多孔質の金属内へ流入した消火ガスを透孔１２２ｂから直接放出することができる。このようにノズル孔１６から放出される消火ガスを吸音材１２５へ直接流入させることによって、消火ガスが該ノズル孔１６から放出直後に過膨張して衝撃波を発生する前に吸音材１２５に流入し、急激に減速および拡散する。したがって衝撃波を伴う強い乱れの発生が防がれ、騒音が抑制される。 In detail, since the sound-absorbing material 125 is packed tightly in the sound-absorbing chamber 124, the extinguishing gas released from the nozzle hole 16 can flow directly into the porous metal that is the sound-absorbing material 125. The extinguishing gas that has flowed into the porous metal can be directly released from the through holes 122b. By causing the extinguishing gas discharged from the nozzle hole 16 to directly flow into the sound absorbing material 125 in this manner, the extinguishing gas flows into the sound absorbing material 125 immediately after being discharged from the nozzle hole 16 before over-expanding and generating shock waves. , rapidly decelerates and spreads. Therefore, generation of strong turbulence accompanied by shock waves is prevented, and noise is suppressed.

また、吸音材１２５の微細な空隙によって消火ガスが拡散するため、吸音材１２５から透孔１２２ｂを経て外部へ放出される消火ガスは、流速が減衰しているため、大きな衝撃波を生じることはなく、これによってもまた騒音が抑制される。このようにして、ノズル部１２の端面１２ａと吸音材１２５の端面１２５ｃとの間が離間している場合と比べて、消火ガスの急激な減圧膨張を抑制することができ、さらに、端壁１１１の内面１２２ａと吸音材１２５の端面１２５ｂとの間が離間している場合と比べて、消火ガスの急激な減圧膨張を抑制することができる。 In addition, since the extinguishing gas is diffused by the minute voids in the sound absorbing material 125, the extinguishing gas released from the sound absorbing material 125 to the outside through the through holes 122b has a flow velocity attenuated, so it does not generate large shock waves. , this also suppresses noise. In this way, compared to the case where the end surface 12a of the nozzle part 12 and the end surface 125c of the sound absorbing material 125 are separated from each other, rapid decompression expansion of the extinguishing gas can be suppressed, and furthermore, the end wall 111 Compared to the case where the inner surface 122a of the sound-absorbing material 125 and the end surface 125b of the sound-absorbing material 125 are separated from each other, rapid depressurized expansion of the extinguishing gas can be suppressed.

このように、本実施形態の消音装置１７ｆは、吸音材１２５である多孔質の金属によって、消火ガスを徐々に減圧膨張してその流速を下げることができるので、消火ガスの噴射に起因する噴射音の発生を抑制することができる。さらに、消音装置１７ｆは、消火ガスの急激な減圧膨張を抑制するように構成されているので、急激な減圧膨張に起因する騒音の発生を抑制することができる。 In this way, the silencer 17f of the present embodiment can gradually reduce the pressure and expand the extinguishing gas by using the porous metal that is the sound absorbing material 125 to lower the flow velocity, so that the noise caused by the injection of the extinguishing gas can be reduced. It is possible to suppress the generation of sound. Furthermore, since the silencer 17f is configured to suppress rapid expansion of the extinguishing gas under reduced pressure, it is possible to suppress the generation of noise caused by rapid expansion of the extinguishing gas under reduced pressure.

図１３において、ノズル孔１６は、導管１４の端部の導管軸線に沿って延びるノズル孔軸線Ｌ１２を有し、ノズル孔１６のノズル孔軸線Ｌ１２に垂直な断面は、ノズル孔軸線Ｌ１２に沿って一様である。噴射ヘッド１３のノズル部１２におけるノズル孔１６が開口するノズル孔１６の出口端部まわりの端面１２ａは、ノズル孔軸線Ｌ１２に垂直な仮想平面上に形成される。消音装置１７ｆは、（ｍ）ノズル孔軸線Ｌ１２に沿って延びる周壁軸線Ｌ１２１を有する円筒状の周壁１２１であって、ノズル孔１６の出口から消火ガスの噴射方向下流に拡がった内部空間１２４を形成する周壁１２１と、（ｎ）周壁１２１における周壁軸線Ｌ１２１方向のノズル部１２から遠ざかった一端部に連なって形成され、前記周壁１２１とともに前記内部空間１２４を規定し、透孔１２２ｂが周壁軸線Ｌ１２１方向に貫通して形成される端壁１２２と、（ｏ）周壁１２１における周壁軸線Ｌ１２１方向のノズル部１２に近い他端部に形成され、噴射ヘッド１３に取付けられる取付け部１２３と、（ｐ）前記内部空間１２４に隙間なく詰めて装填されて収容される吸音材１２５であって、多孔質材料から成り、周壁軸線Ｌ１２１に一致する吸音材軸線Ｌ１２５を有する柱状であり、吸音材１２５の前記ノズル部１２から遠ざかった一端面１２５ｂと、前記ノズル部１２に近い他端面１２５ｃとを有し、吸音材１２５の前記ノズル部１２に近い前記他端面１２５ｃは、吸音材軸線Ｌ１２５に垂直な仮想平面上に形成され、取付け部１２３が噴射ヘッド１３に取付けられることによって、前記一端面１２５ｂ側が前記端壁１２２に支持されるとともに、前記他端面１２５ｃと前記ノズル部１２の前記端面１２ａとが面接触し、微細な空隙を有し、噴射ヘッド１３のノズル部１２から高速で噴射された消火ガスを、前記内部空間１２４に収容された吸音材１２５で拡散させて徐々に減圧膨張させてその流速を下げ、消火ガスの噴射流の振動を吸収し、前記透孔１２２ｂから前記消火対象区画内の空間へ放出する吸音材１２５とを含む。 In FIG. 13, the nozzle hole 16 has a nozzle hole axis L12 extending along the conduit axis at the end of the conduit 14, and a cross section of the nozzle hole 16 perpendicular to the nozzle hole axis L12 has a nozzle hole axis L12 extending along the nozzle hole axis L12. It is uniform. An end surface 12a around the outlet end of the nozzle hole 16 in the nozzle portion 12 of the ejection head 13 is formed on a virtual plane perpendicular to the nozzle hole axis L12. The silencer 17f is (m) a cylindrical peripheral wall 121 having a peripheral wall axis L121 extending along the nozzle hole axis L12, and forms an internal space 124 extending downstream from the outlet of the nozzle hole 16 in the injection direction of extinguishing gas. a peripheral wall 121 (n) formed in a row at one end of the peripheral wall 121 remote from the nozzle part 12 in the direction of the peripheral wall axis L121, defining the internal space 124 together with the peripheral wall 121, and a through hole 122b extending in the direction of the peripheral wall axis L121; (o) an attachment part 123 formed at the other end of the peripheral wall 121 near the nozzle part 12 in the direction of the peripheral wall axis L121 and attached to the ejection head 13; The sound absorbing material 125 is packed and housed in the internal space 124 with no gaps, and is made of a porous material and has a columnar shape with a sound absorbing material axis L125 coinciding with the peripheral wall axis L121, and the nozzle portion of the sound absorbing material 125 is 12, and the other end surface 125c close to the nozzle section 12 of the sound absorbing material 125 is on a virtual plane perpendicular to the sound absorbing material axis L125. By attaching the attachment portion 123 to the ejection head 13, the one end surface 125b side is supported by the end wall 122, and the other end surface 125c and the end surface 12a of the nozzle portion 12 are in surface contact, The fire extinguishing gas, which has minute voids and is injected at high speed from the nozzle part 12 of the injection head 13, is diffused by the sound absorbing material 125 housed in the internal space 124 and gradually decompressed and expanded to lower its flow rate, The sound absorbing material 125 absorbs vibrations of the extinguishing gas jet flow and releases the vibrations from the through hole 122b into the space within the extinguishing target section.

図１４は、本発明の実施のさらに他の形態のガス消火設備に備えられる消音装置１７ｇを示す拡大断面図である。なお、前述の実施形態に対応する部分には、同一の参照符を付す。本実施形態において、消音装置１７ｇは、たとえば消火対象区画の壁面に設けられる噴射ヘッド１３に取付けられる。 FIG. 14 is an enlarged sectional view showing a silencer 17g provided in a gas fire extinguishing equipment according to still another embodiment of the present invention. Note that parts corresponding to the above-described embodiments are given the same reference numerals. In this embodiment, the silencer 17g is attached to, for example, an injection head 13 provided on a wall of a section to be extinguished.

本実施形態の消音装置１７ｇは、筒状の周壁１３１と、周壁１３１の軸線方向他端部に該周壁１３１の軸線に垂直に形成される端壁１３２と、端壁１３２に連なって形成され、噴射ヘッド１３に着脱可能に形成される取付け部１３３とを有する。周壁１３１の軸線方向一端部の内周面には、内ねじが刻設されている。消音装置１７ｇには、周壁１３１、端壁１３２および噴射ヘッド１３によって規定される内部空間である消音室１４０が形成される。 The silencer 17g of the present embodiment includes a cylindrical peripheral wall 131, an end wall 132 formed perpendicularly to the axis of the peripheral wall 131 at the other end of the peripheral wall 131 in the axial direction, and continuous to the end wall 132. It has an attachment part 133 that is formed to be detachably attached to the ejection head 13. An internal thread is formed on the inner circumferential surface of one end of the peripheral wall 131 in the axial direction. A muffling chamber 140, which is an internal space defined by the peripheral wall 131, the end wall 132, and the ejection head 13, is formed in the muffling device 17g.

消音室１４０には、前記軸線方向一端部に設けられる柱状の第１吸音材１３４と、前記軸線方向他端部に設けられる柱状の第２吸音材１３５と、第１吸音材１３４と第２吸音材１３５との間に設けられる筒状の第３吸音材１３６と、第１吸音材１３４を支持する円環状の端板１４１と、円環状のスペーサ１４２と、ナット１４３とが収容される。 The silencing chamber 140 includes a columnar first sound absorbing material 134 provided at one end in the axial direction, a columnar second sound absorbing material 135 provided at the other end in the axial direction, the first sound absorbing material 134 and the second sound absorbing material. A cylindrical third sound absorbing material 136 provided between the first sound absorbing material 135, an annular end plate 141 supporting the first sound absorbing material 134, an annular spacer 142, and a nut 143 are accommodated.

第１吸音材１３４および第２吸音材１３５は、偏平な柱状の多孔質の金属からなる。第１吸音材１３４は、周壁１３１の軸線方向一端部に、内周面に沿って装着されて収容され、端壁１３２の消音室１４０に臨む一表面および噴射ヘッド１３の軸線方向一端部に当接して設けられる。 The first sound absorbing material 134 and the second sound absorbing material 135 are made of flat columnar porous metal. The first sound absorbing material 134 is attached and housed along the inner circumferential surface of one end of the peripheral wall 131 in the axial direction, and is in contact with one surface of the end wall 132 facing the silencing chamber 140 and one end of the ejection head 13 in the axial direction. located adjacent to each other.

第１吸音材１３４の前記軸線方向一端部側には、透孔１４１ａを有する円環状の端板１４１が設けられる。端板１４１は、第１吸音材１３４に当接して設けられ、第１吸音材１３４の前記軸線方向一端部側への移動を規制する。端板１４１の前記軸線方向一端部側には、第３吸音材１３６が設けられる。本実施形態では、第３吸音材１３６は、前述した消
音装置１７の吸音材３３と同一の部材によって実現される。また第３吸音材１３６は、多孔質の金属によって実現されてもよい。第３吸音材１３６は、周壁１３１の内周面に沿って装着されて収容される。 An annular end plate 141 having a through hole 141a is provided at one end of the first sound absorbing material 134 in the axial direction. The end plate 141 is provided in contact with the first sound absorbing material 134 and restricts movement of the first sound absorbing material 134 toward the one end in the axial direction. A third sound absorbing material 136 is provided at one end of the end plate 141 in the axial direction. In this embodiment, the third sound absorbing material 136 is realized by the same member as the sound absorbing material 33 of the above-mentioned muffler 17. Further, the third sound absorbing material 136 may be realized by porous metal. The third sound absorbing material 136 is attached and housed along the inner peripheral surface of the peripheral wall 131.

第３吸音材１３６の前記軸線方向一端部側には、透孔１４２ａを有する円環状のスペーサ１４２が設けられる。スペーサ１４２は、第２吸音材１３５に当接して設けられ、第３吸音材１３６と第２吸音材１３５との間隔を維持する。 An annular spacer 142 having a through hole 142a is provided at one end of the third sound absorbing material 136 in the axial direction. The spacer 142 is provided in contact with the second sound absorbing material 135 and maintains the distance between the third sound absorbing material 136 and the second sound absorbing material 135.

スペーサ１４２の前記軸線方向一端部側には、第２吸音材１３５が設けられる。本実施形態において、第２吸音材１３５は、第１吸音材１３４と同一形状に形成されるが、第１吸音材１３４とは異なる形状に形成されても良い。第２吸音材１３５は、周壁１３１の内周面に沿って装着されて収容される。 A second sound absorbing material 135 is provided at one end of the spacer 142 in the axial direction. In this embodiment, the second sound absorbing material 135 is formed in the same shape as the first sound absorbing material 134, but may be formed in a different shape from the first sound absorbing material 134. The second sound absorbing material 135 is attached and housed along the inner circumferential surface of the peripheral wall 131 .

第２吸音材１３５の前記軸線方向一端部側には、ナット１４３が設けられる。ナット１４３は、その外周部に外ねじが刻設され、周壁１３１の開口端側の内周部に刻設された内ねじに螺合した状態で締付けられ、第２吸音材１３５を前記軸線方向他端部側に押圧しながら支持する。これによって、各吸音材１３４，１３５，１３６、ならびに端板１４１、スペーサ１４２が前記軸線方向一端部側へ変位することが規制される。 A nut 143 is provided at one end of the second sound absorbing material 135 in the axial direction. The nut 143 has an external thread carved on its outer periphery, and is tightened while being screwed into an internal thread carved on the inner periphery on the open end side of the peripheral wall 131, and the second sound absorbing material 135 is tightened in the axial direction. Support it while pressing it toward the other end. This restricts the displacement of each of the sound absorbing materials 134, 135, 136, the end plate 141, and the spacer 142 toward the one end in the axial direction.

図１４において、噴射ヘッド１３のノズル部１２におけるノズル孔１６が開口するノズル孔１６の出口端部まわりの端面は、ノズル孔１６の軸線に垂直な仮想平面上に形成される。消音装置１７ｇは、（ｑ）ノズル孔１６の軸線に沿って延びる軸線を有する円筒状の周壁１３１であって、ノズル孔１６の出口から消火ガスの噴射方向下流に拡がった内部空間１４０を形成する周壁１３１と、（ｒ）周壁１３１の軸線方向のノズル部１２から遠ざかった一端部に形成され、前記周壁１３１とともに前記内部空間１４０を規定し、透孔が周壁１３１の軸線方向に貫通して形成される端壁１４３と、（ｓ）周壁１３１の軸線方向のノズル部１２に近い他端部に形成され、噴射ヘッド１３に取付けられる取付け部１３３と、（ｔ）前記内部空間１４０に収容される第1、第２および第３吸音材１３４，１３５
，１３６であって、多孔質金属から成り、周壁１３１の軸線方向に、前記ノズル部１２から端壁１４３に、第1吸音材１３４と、第３吸音材１３６と、第２吸音材１３５とが、こ
の順序で設けられ、第1吸音材１３４と第２吸音材１３５とは、周壁１３１の軸線に一致
する軸線を有する柱状であり、第３吸音材１３６は、周壁１３１の軸線に一致する軸線を有する筒状であり、第１吸音材１３４の前記ノズル部１２に近い端面は、第１吸音材１３４の前記軸線に垂直な仮想平面上に形成され、第２吸音材１３５は、前記ノズル部１２から遠ざかった端面を有し、取付け部１３３が噴射ヘッド１３に取付けられることによって、第２吸音材１３５の前記ノズル部１２から遠ざかった前記端面と前記端壁１４３とが接触するとともに、第１吸音材１３４の前記ノズル部１２に近い前記端面と前記ノズル部１２の前記端面とが面接触し、これらの第１、第２および第３吸音材１３４，１３５，１３６は、微細な空隙を有し、噴射ヘッド１３のノズル部１２から高速で噴射された消火ガスを、前記内部空間１４０に収容された第１～第３吸音材１３４，１３５，１３６で拡散させて徐々に減圧膨張させてその流速を下げ、消火ガスの噴射流の振動を吸収し、前記透孔１２２ｂから前記消火対象区画内の空間へ放出する第１、第２および第３吸音材１３４，１３５，１３６とを含む。 In FIG. 14, the end surface around the outlet end of the nozzle hole 16 in the nozzle portion 12 of the ejection head 13 is formed on a virtual plane perpendicular to the axis of the nozzle hole 16. The silencer 17g is (q) a cylindrical peripheral wall 131 having an axis extending along the axis of the nozzle hole 16, and forms an internal space 140 extending downstream from the outlet of the nozzle hole 16 in the direction of extinguishing gas injection. a peripheral wall 131; (r) a hole formed at one end of the peripheral wall 131 remote from the nozzle part 12 in the axial direction, defines the internal space 140 together with the peripheral wall 131, and has a through hole penetrating the peripheral wall 131 in the axial direction; (s) an attachment part 133 formed at the other end of the peripheral wall 131 near the nozzle part 12 in the axial direction and attached to the injection head 13; and (t) accommodated in the internal space 140. First, second and third sound absorbing materials 134, 135
, 136 is made of porous metal, and in the axial direction of the peripheral wall 131, from the nozzle part 12 to the end wall 143, a first sound absorbing material 134, a third sound absorbing material 136, and a second sound absorbing material 135 are arranged. , provided in this order, the first sound absorbing material 134 and the second sound absorbing material 135 are columnar with an axis that coincides with the axis of the peripheral wall 131, and the third sound absorbing material 136 has an axis that coincides with the axis of the peripheral wall 131. The end surface of the first sound absorbing material 134 close to the nozzle part 12 is formed on a virtual plane perpendicular to the axis of the first sound absorbing material 134, and the second sound absorbing material 135 has a cylindrical shape near the nozzle part 12. 12, and by attaching the attachment part 133 to the ejection head 13, the end face of the second sound absorbing material 135, which is remote from the nozzle part 12, comes into contact with the end wall 143, and the first The end face of the sound absorbing material 134 near the nozzle part 12 and the end face of the nozzle part 12 are in surface contact, and these first, second, and third sound absorbing materials 134, 135, and 136 have fine gaps. Then, the extinguishing gas injected at high speed from the nozzle part 12 of the injection head 13 is diffused by the first to third sound absorbing materials 134, 135, 136 housed in the internal space 140, and is gradually expanded under reduced pressure. It includes first, second, and third sound absorbing materials 134, 135, and 136 that reduce the flow velocity, absorb vibrations of the extinguishing gas jet stream, and emit the vibrations from the through hole 122b into the space within the extinguishing target section.

本実施形態によれば、消音装置１７ｇは、３つの消音材を収容して設けられる。このように第１吸音材１３４をノズル孔１６の直後に設けることによって、消音装置１７ｇは、枝管１９側から供給される消火ガスを、徐々に減圧膨張し、その流速を下げることができる。また第３吸音材１３６が設けられるので、第３吸音材１３６によって、消火ガスの噴射流に起因する音響振動を吸収し、消火ガスの噴射に起因する噴射音の発生を抑制することができる。また第２吸音材１３５が設けられるので、第３吸音材１３６を通過した消火
ガスをさらに減圧し、その流速を下げることができる。これによって、消火ガスの噴射に起因する噴射音の発生をさらに抑制することができる。 According to this embodiment, the muffling device 17g is provided to accommodate three muffling materials. By providing the first sound absorbing material 134 immediately after the nozzle hole 16 in this way, the muffling device 17g can gradually decompress and expand the extinguishing gas supplied from the branch pipe 19 side, thereby lowering its flow rate. Further, since the third sound absorbing material 136 is provided, the third sound absorbing material 136 can absorb acoustic vibrations caused by the jet flow of the fire extinguishing gas, and can suppress the generation of jet noise caused by the jet of the fire extinguishing gas. Further, since the second sound absorbing material 135 is provided, the extinguishing gas that has passed through the third sound absorbing material 136 can be further reduced in pressure and its flow rate can be lowered. Thereby, it is possible to further suppress the generation of injection noise caused by the injection of extinguishing gas.

図１５は、本発明の実施のさらに他の形態のガス消火設備に備えられる消音装置１７ｈを示す拡大断面図である。なお、前述の実施形態に対応する部分には、同一の参照符を付す。本実施形態において、消音装置１７ｈは、たとえば消火対象区画の壁面に設けられる枝管１９に噴射ヘッド１３を介して装着される。 FIG. 15 is an enlarged sectional view showing a silencer 17h provided in a gas fire extinguishing equipment according to still another embodiment of the present invention. Note that parts corresponding to the above-described embodiments are given the same reference numerals. In this embodiment, the silencer 17h is attached to a branch pipe 19 provided on the wall surface of the section to be extinguished, for example, via the injection head 13.

本実施形態の消音装置１７ｈは、噴射ヘッド１３、有底筒状のケーシング１５０、ケーシング１５０の開口部に螺着されるナット１５１、噴射ヘッド１３に装着される円筒状の第１吸音材１５２、ケーシング１５０に収容され、ケーシング１５０の内周面に沿って配置される円筒状の第２吸音材１５３、ケーシング１５０内で噴射ヘッド１３の基端部に装着される円環状の第１挟持片１５４、ケーシング１５０内の開口部側に前記噴射ヘッド１３の端面に当接した状態で設けられる円板状の第２挟持片１５５、およびナット１５１によってケーシング１５０の開口部に支持された状態で保持される円板状の第３吸音材１５６を含む。 The silencer 17h of this embodiment includes an injection head 13, a bottomed cylindrical casing 150, a nut 151 screwed into the opening of the casing 150, a cylindrical first sound absorbing material 152 attached to the injection head 13, A cylindrical second sound absorbing material 153 accommodated in the casing 150 and arranged along the inner circumferential surface of the casing 150, and an annular first clamping piece 154 attached to the base end of the injection head 13 within the casing 150. , is held in a state where it is supported by the opening of the casing 150 by a second disc-shaped clamping piece 155 provided on the opening side of the casing 150 in contact with the end surface of the injection head 13, and a nut 151. The third sound absorbing material 156 includes a disc-shaped third sound absorbing material 156.

前記ケーシング１５０は、直円筒状の筒部１５７と、筒部１５７の軸線方向一端部から半径方向外方に垂直に突出するフランジ部１５８と、筒部１５７の軸線方向他端部から半径方向内方に延びる円環状の端壁部１５９とを有する。フランジ部１５８の外周部分には外ねじ１６０が刻設される。端壁部１５９には、その中心軸線上に噴射ノズル１３の基端部が嵌り込む挿通孔１６１が形成される。このようなケーシング１５０は、金属から成る。また第１～第３吸音材１５２，１５３，１５６は、前述と同様な多孔質の金属からなる。 The casing 150 includes a right cylindrical tube portion 157, a flange portion 158 vertically protruding radially outward from one axial end of the tube portion 157, and a flange portion 158 extending radially inward from the other axial end of the tube portion 157. It has an annular end wall portion 159 extending in the direction. An external thread 160 is formed on the outer peripheral portion of the flange portion 158 . An insertion hole 161 into which the base end of the injection nozzle 13 fits is formed on the central axis of the end wall portion 159 . Such a casing 150 is made of metal. Furthermore, the first to third sound absorbing materials 152, 153, and 156 are made of the same porous metal as described above.

ナット１５１は、直円筒状の筒部１６２と、筒部１６２の軸線方向一端部から半径方向内方に突出するフランジ部１６３とを有する。筒部１６２の軸線方向他端部の内周面には内ねじ１６４が刻設され、前記ケーシング１５０の外ねじ１６０に螺合する。このようなナット１５１は、金属から成り、ケーシング１５０の外ねじ１６０に螺着させた状態で締付けることによって、前記第３吸音材１５６の周縁部がケーシング１５０のフランジ部１５８とナット１５１のフランジ部１６３とによって挟持されるとともに、第３吸音材１５６と噴射ヘッド１３の端壁部１６５とによって第２挟持片１５５が挟持されるとともに、第２吸音材１５３のケーシング１５０からの抜出しが防止される。 The nut 151 has a right cylindrical cylindrical portion 162 and a flange portion 163 that protrudes radially inward from one axial end of the cylindrical portion 162 . An internal thread 164 is formed on the inner peripheral surface of the other axial end of the cylindrical portion 162 and is screwed into the external thread 160 of the casing 150 . Such a nut 151 is made of metal, and by screwing it onto the external thread 160 of the casing 150 and tightening it, the peripheral edge of the third sound absorbing material 156 is connected to the flange portion 158 of the casing 150 and the flange portion of the nut 151. 163 , the second holding piece 155 is held between the third sound absorbing material 156 and the end wall portion 165 of the injection head 13 , and the second sound absorbing material 153 is prevented from being pulled out from the casing 150 . .

噴射ヘッド１３は、スパナなどの締付け工具が掛合される掛合部１６６と、掛合部１６６に軸線方向に連なる筒部１６７と、筒部１６７の軸線方向一端部を塞ぐ端壁部１６５とを有する。筒部１５７には、周方向に間隔をあけて、たとえば９０°毎にノズル孔１６が厚み方向に貫通して形成される。筒部１６７の前記掛合部１６６寄りの基部には、外ねじ１６８が刻設される。この外ねじ１６８には第１挟持片１５４の内周部に刻設された内ねじ１６９が螺合し、第２挟持部１５５と掛合部１６６とによってケーシング１５０の端壁部１５９を挟持し、噴射ヘッド１３がケーシング１５０に同一軸線上に固定される。第１吸音材１５２は、前述したように噴射ヘッド１３に装着された状態、すなわちケーシング１５０内で筒部１２に装着された状態で、第１および第２挟持片１５４，１５５によって軸線方向両側から挟持された状態で保持されている。このような消音装置１７ｈにおいて、第１吸音材１５２と第２吸音材１５３との間には、ケーシング１５０の端壁部１５９と第３吸音材１５６とにわたって環状の空間１７０が形成される。 The injection head 13 includes a hooking part 166 to which a tightening tool such as a spanner is engaged, a cylindrical part 167 connected to the engaging part 166 in the axial direction, and an end wall part 165 that closes one end of the cylindrical part 167 in the axial direction. Nozzle holes 16 are formed in the cylindrical portion 157 at intervals in the circumferential direction, for example, every 90 degrees, passing through the tube portion 157 in the thickness direction. An external thread 168 is formed on the base of the cylindrical portion 167 near the engaging portion 166 . An internal thread 169 formed on the inner peripheral part of the first clamping piece 154 is screwed into this external thread 168, and the end wall part 159 of the casing 150 is clamped by the second clamping part 155 and the engaging part 166. The injection head 13 is fixed to the casing 150 on the same axis. As described above, the first sound absorbing material 152 is attached to the injection head 13, that is, attached to the cylindrical portion 12 within the casing 150, from both sides in the axial direction by the first and second clamping pieces 154, 155. It is held in a pinched state. In such a silencer 17h, an annular space 170 is formed between the first sound absorbing material 152 and the second sound absorbing material 153, extending over the end wall portion 159 of the casing 150 and the third sound absorbing material 156.

枝管１９から噴射ヘッド１３に供給された高圧の消火ガスは、噴射ヘッド１３の各ノズル孔１６から第１吸音材１５２内へ噴射され、その衝撃波は急激に拡散して減速し、それによって衝撃波を伴なう強い乱れの発生を防ぎ、減音することができる。第１吸音材１５
２から空間１７０に排出された消火ガスは、第２吸音材１５３に浸入して前記第１吸音材１５２と同様に急激に拡散されて減速され、筒部１５０の内周面で反射されて第３吸音材１５６へ向かう。第３吸音材１５６に浸入した消火ガスは、前述の第１および第２吸音材１５２，１５３と同様に、急激に膨張する前に拡散して失速し、これによってさらに減音され、消火ガスの噴射に起因する噴射音を格段に低減することができる。 The high-pressure extinguishing gas supplied to the injection head 13 from the branch pipe 19 is injected into the first sound absorbing material 152 from each nozzle hole 16 of the injection head 13, and the shock wave is rapidly diffused and decelerated, thereby causing the shock wave to become It is possible to prevent the occurrence of strong disturbances accompanied by noise and reduce noise. First sound absorbing material 15
The extinguishing gas discharged into the space 170 from the second sound absorbing material 153 enters the second sound absorbing material 153, is rapidly diffused and decelerated in the same way as the first sound absorbing material 152, and is reflected on the inner circumferential surface of the cylindrical portion 150. 3 toward the sound absorbing material 156. The extinguishing gas that has entered the third sound absorbing material 156, like the first and second sound absorbing materials 152 and 153 described above, diffuses and stalls before rapidly expanding, thereby further reducing the sound of the extinguishing gas. Injection noise caused by injection can be significantly reduced.

図１５において、噴射ヘッド１３は、導管１４の端部に接続され、この端部の軸線に追って延び、複数のノズル孔１６が厚み方向に貫通して形成される筒部１６７と、導管１４の端部から遠ざかった筒部１６７の軸線方向一端部を塞ぐ端壁部１６５とを有し、消音装置１７ｈは、（ｕ）第１吸音材１５２であって、筒状に形成され、噴射ヘッド１３の筒部１６７が挿通され、噴射ヘッド１３の筒部１６７の外周面であるノズル孔１６の出口端部まわりの円弧状端面に、面接触する内周面を有する第１吸音材１５２と、（ｖ）ケーシング１５０であって、（ｖ１）噴射ヘッド１３の筒部１６７の軸線に沿って延び、第１吸音材１５２の放射方向に間隔をあけて外囲する筒部１５７と、（ｖ２）導管１４の端部の近くで筒部１５７を塞ぎ、噴射ヘッド１３に接続されるケーシング端壁部１５９とを有するケーシング１５０と、（ｗ）筒状に形成され、筒部１５７の内周面に沿って配置され、第１吸音材１５２の外周面との間に環状の空間１７０を形成する第２吸音材１５３と、（ｘ）ケーシング１５０の筒部１５７における導管１４の端部から遠ざかった端部に配置され、環状の空間からの消火ガスを消火対象区画内の空間へ放出する第３吸音材１５６とを含み、（ｙ）これらの第１、第２および第３吸音材１５２，１５３，１５６は、微細な空隙を有し、噴射ヘッド１３のノズル部１２から高速で噴射された消火ガスを、拡散させて徐々に減圧膨張させてその流速を下げ、消火ガスの噴射流の振動を吸収する。 In FIG. 15, the injection head 13 is connected to the end of the conduit 14, extends along the axis of this end, and has a cylindrical portion 167 formed with a plurality of nozzle holes 16 passing through it in the thickness direction. The silencer 17h includes (u) a first sound absorbing material 152 formed in a cylindrical shape, and has an end wall portion 165 that closes one end in the axial direction of the cylinder portion 167 that is far from the end. The first sound absorbing material 152 has an inner circumferential surface through which the cylindrical portion 167 is inserted and is in surface contact with an arcuate end surface around the outlet end of the nozzle hole 16, which is the outer circumferential surface of the cylindrical portion 167 of the injection head 13; v) The casing 150 includes (v1) a cylinder part 157 that extends along the axis of the cylinder part 167 of the injection head 13 and surrounds the first sound absorbing material 152 at intervals in the radial direction; and (v2) a conduit. (w) a casing 150 having a casing end wall 159 that closes the cylindrical portion 157 near the end of the cylindrical portion 14 and is connected to the injection head 13 ; (x) the end of the cylindrical portion 157 of the casing 150 remote from the end of the conduit 14; (y) these first, second and third sound absorbing materials 152, 153, 156; has minute voids and diffuses the extinguishing gas injected at high speed from the nozzle part 12 of the injection head 13 and gradually expands it under reduced pressure to lower its flow velocity and absorb vibrations of the extinguishing gas jet stream. .

図１５に示す実施形態では、噴射ヘッド１３の筒部１２にその軸線に対して垂直に複数の噴射ノズル１６を形成して半径方向外方に消火ガスを噴射するように構成されるが、本発明のさらに他の実施形態では、噴射ヘッド１３の筒部にケーシング１５０の開口部に向けて傾斜したノズル孔１６を形成して第１吸音材１５２を透過したガスがそのまま第３吸音材１５６に向かって放出されるように構成されてもよく、同様な効果を達成することができる。 In the embodiment shown in FIG. 15, a plurality of injection nozzles 16 are formed perpendicularly to the axis of the cylindrical portion 12 of the injection head 13 to inject extinguishing gas radially outward. In yet another embodiment of the invention, the nozzle hole 16 is formed in the cylindrical portion of the injection head 13 so as to be inclined toward the opening of the casing 150, so that the gas that has passed through the first sound absorbing material 152 is directly transmitted to the third sound absorbing material 156. It may also be configured to emit towards the target, and a similar effect can be achieved.

本発明は、次の実施の形態が可能である。
（１）高圧の消火ガスを空間に向けて噴射するノズル部を有する噴射ヘッドと、
噴射ヘッドが接続され、噴射ヘッドに高圧の消火ガスを導く導管と、
導管に高圧の消火ガスを供給する消火ガス供給源と、
噴射ヘッドに設けられ、ノズル部からの消火ガスの放出による音響を減衰させる消音装置とを含むことを特徴とするガス消火設備。 The present invention can be implemented in the following embodiments.
(1) An injection head having a nozzle part that injects high-pressure extinguishing gas into space;
a conduit to which the injection head is connected and which guides high-pressure extinguishing gas to the injection head;
a fire extinguishing gas supply source that supplies high pressure fire extinguishing gas to the conduit;
Gas fire extinguishing equipment, characterized in that it includes a muffling device that is provided on the injection head and attenuates the sound caused by the discharge of fire extinguishing gas from the nozzle part.

（２）消音装置は、筒状の周壁と、周壁の軸線方向一端部に、該周壁の軸線に垂直に形成される端壁と、周壁の軸線方向他端部に、噴射ヘッドに着脱可能に形成される取付け部とを含み、
周壁には、複数の通気孔が該周壁の厚み方向に貫通して形成されることを特徴とするガス消火設備。
消音装置は周壁と端壁と取付け部とを有し、取付け部によって噴射ヘッドに着脱可能に取付けられる。このように消音装置が構成されることによって、噴射ヘッドのノズル部から噴射された消火ガスは、端壁に衝突した後、周壁に形成される複数の透孔から外部に放出され、大きな噴射音の発生が抑制される。 (2) The silencer includes a cylindrical peripheral wall, an end wall formed perpendicularly to the axis of the peripheral wall at one end in the axial direction of the peripheral wall, and an end wall formed at the other end in the axial direction of the peripheral wall, which is removably attached to the injection head. an attachment portion formed;
A gas fire extinguishing equipment characterized in that a plurality of ventilation holes are formed in a peripheral wall so as to penetrate the peripheral wall in a thickness direction thereof.
The muffling device has a peripheral wall, an end wall, and an attachment portion, and is removably attached to the injection head by the attachment portion. By configuring the silencer in this way, the extinguishing gas injected from the nozzle part of the injection head collides with the end wall and is then emitted to the outside from the multiple through holes formed in the peripheral wall, making a loud jet noise. The occurrence of is suppressed.

（３）消音装置は、筒状の周壁と、周壁の軸線方向一端部に、該周壁の軸線に垂直に形成される端壁と、周壁の軸線方向他端部に、噴射ヘッドに着脱可能に形成される取付け部とを含み、端壁には、複数の通気孔が該端壁の厚み方向に貫通して形成されることを特徴
とするガス消火設備。 (3) The silencer includes a cylindrical peripheral wall, an end wall formed perpendicularly to the axis of the peripheral wall at one end in the axial direction of the peripheral wall, and an end wall formed at the other end in the axial direction of the peripheral wall, which is removably attached to the injection head. 1. A gas fire extinguishing equipment comprising: a mounting portion formed in the end wall, and a plurality of ventilation holes penetrating the end wall in the thickness direction thereof.

消音装置は周壁と端壁と取付け部とを含み、取付け部によって噴射ヘッドに着脱可能に取付けられる。噴射ヘッドのノズル部から高速で噴射された消火ガスは、周壁内の空間を経て端壁に衝突した後、この端板に形成される複数の透孔から外部へ放出される。このような消音装置の構成によってもまた、消火ガス噴射時に大きな噴射音が発生することが防がれる。 The muffling device includes a peripheral wall, an end wall, and a mounting portion, and is removably mounted to the jet head by the mounting portion. The extinguishing gas injected at high speed from the nozzle portion of the injection head passes through the space within the peripheral wall, collides with the end wall, and is then discharged to the outside from a plurality of through holes formed in the end plate. This configuration of the silencer also prevents generation of loud injection noise when extinguishing gas is injected.

（４）周壁、端壁および取付け部によって規定される内部空間には、吸音材が収容されることを特徴とするガス消火設備。 (4) A gas fire extinguishing system characterized in that a sound absorbing material is housed in the internal space defined by the peripheral wall, end wall, and mounting portion.

前記消音装置の周壁、端壁および取付け部によって規定される内部空間に吸音材が収容されるので、この吸音材によって消火ガスの噴射流の振動が吸収され、これによってより一層噴射音の発生が防がれる。 Since a sound absorbing material is housed in the internal space defined by the peripheral wall, end wall, and mounting portion of the silencer, vibrations of the extinguishing gas jet stream are absorbed by this sound absorbing material, thereby further suppressing the generation of jet noise. Prevented.

（５）消音装置は、筒状の周壁と、周壁の軸線方向一端部に、該周壁の軸線に垂直に形成される端壁と、周壁の軸線方向他端部に、噴射ヘッドが一体的に形成される取付け部と、噴射ヘッドのノズル部における消火ガスの噴射方向下流側に臨む部分に設けられる内筒体とを含み、
端壁には、その厚み方向に貫通するガス放出孔が形成され、
内筒体は、複数の透孔が形成される筒状部と、筒状部の軸線方向一端部に、該筒状部の軸線に垂直に形成される端板とを有することを特徴とするガス消火設備。 (5) The silencer includes a cylindrical peripheral wall, an end wall formed perpendicularly to the axis of the peripheral wall at one axial end of the peripheral wall, and an injection head integrally formed at the other axial end of the peripheral wall. and an inner cylindrical body provided in a part of the nozzle part of the injection head facing downstream in the injection direction of extinguishing gas,
A gas release hole is formed in the end wall to penetrate in the thickness direction.
The inner cylindrical body is characterized by having a cylindrical part in which a plurality of through holes are formed, and an end plate formed perpendicularly to the axis of the cylindrical part at one end in the axial direction of the cylindrical part. Gas fire extinguishing equipment.

噴射ヘッドのノズル部から高速で噴射された消火ガスは、内筒体内で、この内筒体の筒状の端板に衝突し、筒状部に形成される複数の透孔から放出された後、さらに筒状体と周壁との間の空間を経て端壁に形成されるガス放出孔から外部へ放出される。これによって消火ガス放出時における噴射音の発生が防がれる。 The extinguishing gas injected at high speed from the nozzle part of the injection head collides with the cylindrical end plate of the inner cylinder inside the inner cylinder, and is released from the multiple through holes formed in the cylinder. The gas is further discharged to the outside through the gas discharge hole formed in the end wall through the space between the cylindrical body and the peripheral wall. This prevents the generation of jet noise when the extinguishing gas is released.

（６）高圧の消火ガスを空間に向けて噴射するノズル部を有する噴射ヘッドと、
噴射ヘッドが接続され、噴射ヘッドに高圧の消火ガスを導く導管と、
導管に高圧の消火ガスを供給する消火ガス供給源とを含み、
噴射ヘッドのノズル部には、前記導管の内周面に滑らかに連なる内周面を有するノズル孔が形成されることを特徴とするガス消火設備。 (6) an injection head having a nozzle part that injects high-pressure fire extinguishing gas toward the space;
a conduit to which the injection head is connected and which guides high-pressure extinguishing gas to the injection head;
a fire extinguishing gas supply source that supplies high pressure fire extinguishing gas to the conduit;
Gas fire extinguishing equipment, characterized in that the nozzle portion of the injection head is formed with a nozzle hole having an inner circumferential surface that smoothly extends to the inner circumferential surface of the conduit.

消火ガス供給源から導管に供給された高圧の消火ガスは、噴射ヘッドを介して建物内などの空間に向けて噴射される。このような噴射ヘッドには導管の内周面に滑らかに連なる内周面を有するノズル孔が形成されるので、噴射ヘッドのノズル部から高速で噴射される消火ガスの噴射流に起因して大きな噴射音を発生することが防がれる。 High-pressure extinguishing gas is supplied from the extinguishing gas supply source to the conduit and is injected into a space such as inside a building via an injection head. Since such an injection head is formed with a nozzle hole having an inner circumferential surface that smoothly extends to the inner circumferential surface of the conduit, a large Generation of injection noise is prevented.

（７）高圧の消火ガスを空間に向けて噴射するノズル部を有する噴射ヘッドと、
噴射ヘッドが接続され、噴射ヘッドに高圧の消火ガスを導く導管と、
導管に高圧の消火ガスを供給する消火ガス供給源と、
噴射ヘッドと導管との間に設けられ、ノズル部からの消火ガスの放出による音響を減衰させる消音装置とを含むことを特徴とするガス消火設備。 (7) an injection head having a nozzle part that injects high-pressure fire extinguishing gas into space;
a conduit to which the injection head is connected and which guides high-pressure extinguishing gas to the injection head;
a fire extinguishing gas supply source that supplies high pressure fire extinguishing gas to the conduit;
1. A gas fire extinguishing equipment characterized by comprising a muffling device provided between an injection head and a conduit to attenuate sound caused by discharge of fire extinguishing gas from a nozzle part.

消火ガス供給源から導管に供給された高圧の消火ガスは、噴射ヘッドを介して建物内の空間に向けて噴射される。このような噴射ヘッドと導管との間に消音装置が設けられ、噴射ヘッドのノズル部から高速で噴射される消火ガスの噴射流に起因する大きな噴射音の発生を防止することができる。 High pressure extinguishing gas is supplied from the extinguishing gas supply source to the conduit and is injected into the space within the building via the injection head. A silencer is provided between such an injection head and a conduit, and it is possible to prevent generation of large injection noise caused by a jet stream of extinguishing gas injected at high speed from a nozzle portion of the injection head.

（８）消音装置は、筒状の周壁と、周壁の軸線方向一端部に、導管に着脱可能に形成される第１の取付け部と、周壁の軸線方向他端部に、噴射ヘッドに着脱可能に形成される第２の取付け部と、前記一端部に周壁の軸線に垂直に形成される第１の端壁と、前記他端部に周壁の軸線に垂直に形成される第２の端壁とを含み、
第１の端壁には、周壁の軸線を中心として該第１の端壁の中央部に、少なくとも１つの透孔が該第１の端壁の厚み方向に貫通して形成され、
第２の端壁には、複数の透孔が該第２の端壁の厚み方向に貫通して形成されることを特徴とするガス消火設備。 (8) The silencer includes a cylindrical peripheral wall, a first attachment part formed at one axial end of the peripheral wall so that it can be attached to and detached from the conduit, and a first attachment part formed at the other axial end of the circumferential wall so that it can be attached to and detached from the injection head. a second mounting portion formed at the one end, a first end wall formed perpendicular to the axis of the peripheral wall at the one end, and a second end wall formed at the other end perpendicular to the axis of the peripheral wall. including
At least one through hole is formed in the first end wall at a central portion of the first end wall centering on the axis of the peripheral wall and penetrating in the thickness direction of the first end wall,
A gas fire extinguishing equipment characterized in that a plurality of through holes are formed in the second end wall so as to pass through the second end wall in a thickness direction thereof.

消音装置は周壁と第１，第２の端壁と第１，第２の取付け部とを有し、第１，第２の取付け部によって噴射ヘッドおよび導管の間に着脱可能に取付けられる。導管から供給され、第１の端壁に形成される透孔から高速で噴射された消火ガスは、消音装置内で、第２の端壁の中央部に衝突した後、第２の端壁に形成される複数の透孔から、第２の端壁と噴射ヘッドとで規定される空間内に放出された後、噴射ヘッドから外部へ放出される。消音装置は、第１の端壁に形成される透孔から高速で噴射された消火ガスを消音装置内の空間で膨張させることによって、第２の端壁に形成される透孔での流速を下げるので、噴射ヘッドからの消火ガス放出による音響の発生が抑制される。 The muffler has a peripheral wall, first and second end walls, and first and second attachment parts, and is removably attached between the injection head and the conduit by the first and second attachment parts. The extinguishing gas supplied from the conduit and injected at high speed from the through hole formed in the first end wall collides with the center of the second end wall within the silencer, and then hits the second end wall. The liquid is ejected from the plurality of through holes formed into a space defined by the second end wall and the ejection head, and then emitted from the ejection head to the outside. The muffler increases the flow velocity in the through-hole formed in the second end wall by expanding extinguishing gas injected at high speed from the through-hole formed in the first end wall in the space inside the muffler. This suppresses the generation of sound caused by the release of extinguishing gas from the injection head.

（９）消音装置は、筒状の周壁と、周壁の軸線方向一端部に、導管に着脱可能に形成される第１の取付け部と、周壁の軸線方向他端部に、噴射ヘッドに着脱可能に形成される第２の取付け部と、前記一端部に周壁の軸線に垂直に形成される第１の端壁と、前記他端部に周壁の軸線に垂直に形成される第２の端壁とを含み、
第１の端壁には、導管から供給される高圧の消火ガスを、周壁、第１の端壁および第２の端壁によって規定される内部空間に噴出する複数のノズル孔を有する案内部が、周壁の軸線上に該内部空間に臨んで形成され、該複数のノズル孔は、周壁の軸線に直交する軸線上に周壁の軸線に関して周方向に等角度で間隔をあけて形成され、
第２の端壁には、複数の透孔が該第２の端壁の厚み方向に貫通して形成されることを特徴とするガス消火設備。 (9) The silencer includes a cylindrical peripheral wall, a first attachment part formed at one axial end of the peripheral wall so that it can be attached to and detached from the conduit, and a first attachment part formed at the other axial end of the circumferential wall so that it can be attached to and detached from the injection head. a second mounting portion formed at the one end, a first end wall formed perpendicular to the axis of the peripheral wall at the one end, and a second end wall formed at the other end perpendicular to the axis of the peripheral wall. including
The first end wall has a guide portion having a plurality of nozzle holes that ejects high-pressure extinguishing gas supplied from the conduit into the internal space defined by the peripheral wall, the first end wall, and the second end wall. , are formed on the axis of the peripheral wall facing the internal space, and the plurality of nozzle holes are formed on an axis perpendicular to the axis of the peripheral wall at equiangular intervals in the circumferential direction with respect to the axis of the peripheral wall,
A gas fire extinguishing equipment characterized in that a plurality of through holes are formed in the second end wall so as to pass through the second end wall in a thickness direction thereof.

消音装置は周壁と第１，第２の端壁と第１，第２の取付け部とを有し、第１，第２の取付け部によって噴射ヘッドおよび導管の間に着脱可能に取付けられる。導管から供給され、第１の端壁に形成される案内部のノズル孔から高速で噴射された消火ガスは、消音装置内で、周壁の内周面に衝突した後、第２の端壁に形成される複数の透孔から、第２の端壁と噴射ヘッドとで規定される空間内に放出された後、噴射ヘッドから外部へ放出される。消音装置は、第１の端壁に形成される案内部のノズル孔から高速で噴射された消火ガスを消音装置内の空間で膨張させることによって、第２の端壁に形成される透孔での流速を下げるので、噴射ヘッドからの消火ガス放出による音響の発生が抑制される。 The muffler has a peripheral wall, first and second end walls, and first and second attachment parts, and is removably attached between the injection head and the conduit by the first and second attachment parts. The extinguishing gas supplied from the conduit and injected at high speed from the nozzle hole of the guide part formed in the first end wall collides with the inner circumferential surface of the peripheral wall in the silencer, and then hits the second end wall. The liquid is ejected from the plurality of through holes formed into a space defined by the second end wall and the ejection head, and then emitted from the ejection head to the outside. The silencer is a through hole formed in the second end wall by expanding extinguishing gas injected at high speed from a nozzle hole of a guide part formed in the first end wall in a space inside the silencer. Since the flow velocity is lowered, the generation of sound due to extinguishing gas discharged from the injection head is suppressed.

（１０）消音装置は、筒状の周壁と、周壁の軸線方向一端部に、該周壁の軸線に垂直に形成される第１の端壁と、噴射ヘッドに着脱可能に形成される取付け部を有し、周壁の軸線方向他端部に該周壁の軸線に垂直に形成される第２の端壁と、第１の端壁と第２の端壁との間に、周壁の軸線に垂直に形成される障壁と、噴射ヘッドから噴射される消火ガスを、周壁、第１の端壁および障壁によって規定される内部空間である第１の消音室に導く筒状の導通管と、周壁、第２の端壁および障壁によって規定される内部空間である第２の消音室内の消火ガスを外部に導く筒状の通気管とを含み、
障壁には、複数の透孔が該障壁の厚み方向に貫通して形成され、
導通管には、導通管の軸線方向一端部に噴射ヘッドに着脱可能に連結される連結部が形成され、導通管の軸線方向他端部に端板が形成され、導通管の周壁のうち第１の消音室に突き出された部分には、複数の透孔が該導通管の周壁の厚み方向に貫通して形成され、通気管は、障壁および第１の端壁を貫通して配置されることを特徴とするガス消火設備。 (10) The silencer includes a cylindrical peripheral wall, a first end wall formed perpendicular to the axis of the peripheral wall at one end in the axial direction of the peripheral wall, and a mounting portion removably formed on the injection head. a second end wall formed perpendicular to the axis of the peripheral wall at the other end in the axial direction of the peripheral wall; and a second end wall formed perpendicular to the axis of the peripheral wall between the first end wall and the second end wall. a cylindrical conduction pipe that guides the extinguishing gas injected from the injection head to the first silencing chamber, which is an internal space defined by the peripheral wall, the first end wall, and the barrier; a cylindrical ventilation pipe that guides extinguishing gas in the second silencing chamber, which is an internal space defined by the second end wall and the barrier, to the outside;
A plurality of through holes are formed in the barrier to penetrate in the thickness direction of the barrier,
The conduction tube is formed with a connection part that is removably connected to the injection head at one end in the axial direction of the conduction tube, an end plate is formed at the other end in the axial direction of the conduction tube, and an end plate is formed at the other end in the axial direction of the conduction tube. A plurality of through holes are formed in the portion protruding into the silencing chamber 1, penetrating the circumferential wall of the conduit tube in the thickness direction, and the vent tube is arranged to penetrate the barrier and the first end wall. Gas fire extinguishing equipment characterized by:

消音装置は周壁と第１の障壁と取付け部を有する第２の端壁と障壁とを含み、取付け部によって噴射ヘッドに着脱可能に取付けられる。連結部によって噴射ヘッドに連結される導通管に形成される複数の透孔から第１の消音室に高速で噴射された消火ガスは、障壁に形成される複数の透孔から第２の消音室に放出される。第２の消音室に放出された消火ガスは、通気管を介して消音装置の外部へ放出される。消音装置は、導通管に形成される複数の透孔から高速で噴射された消火ガスを第１の消音室内の空間および第２の消音室内の空間で膨張させることによって、通気管での流速を下げるので、通気管からの消火ガス放出による音響の発生が抑制される。 The muffler includes a peripheral wall, a first barrier, a second end wall having an attachment portion, and a barrier, and is removably attached to the ejection head by the attachment portion. The extinguishing gas is injected at high speed into the first silencing chamber from the plurality of through holes formed in the conduit pipe connected to the injection head by the connecting part, and is then transferred from the plurality of through holes formed in the barrier to the second silencing chamber. is released. The extinguishing gas discharged into the second muffling chamber is discharged to the outside of the muffler via the ventilation pipe. The silencer reduces the flow velocity in the ventilation pipe by expanding extinguishing gas injected at high speed from a plurality of through holes formed in the conduction pipe in the space inside the first sound deadening chamber and the space inside the second sound deadening chamber. This suppresses the generation of sound caused by the release of extinguishing gas from the ventilation pipes.

（１１）消音装置は、筒状の周壁と、周壁の軸線方向一端部に、該周壁の軸線に垂直に形成される第１の端壁と、噴射ヘッドに着脱可能に形成される取付け部を有し、周壁の軸線方向他端部に該周壁の軸線に垂直に形成される第２の端壁と、第１の端壁と第２の端壁との間に、周壁の軸線に垂直に形成される障壁と、噴射ヘッドから噴射される消火ガスを、周壁、第１の端壁および障壁によって規定される内部空間である第１の消音室に導く筒状の導通管と、周壁、第２の端壁および障壁によって規定される内部空間である第２の消音室内の消火ガスを外部に導く筒状の複数の通気管とを含み、
障壁には、複数の透孔が該障壁の厚み方向に貫通して形成され、
導通管には、導通管の軸線方向一端部に噴射ヘッドに着脱可能に連結される連結部が形成され、導通管の軸線方向他端部に端板が形成され、導通管の周壁のうち第１の消音室に突き出された部分には、複数の透孔が該導通管の周壁の厚み方向に貫通して形成され、
複数の通気管は、周壁の軸線に直交する軸線上に、周壁の軸線に関して周方向に等角度で間隔をあけて配置され、それぞれ周壁を貫通して形成されることを特徴とするガス消火設備。 (11) The silencer includes a cylindrical peripheral wall, a first end wall formed perpendicular to the axis of the peripheral wall at one end in the axial direction of the peripheral wall, and a mounting portion removably formed on the injection head. a second end wall formed perpendicular to the axis of the peripheral wall at the other end in the axial direction of the peripheral wall; and a second end wall formed perpendicular to the axis of the peripheral wall between the first end wall and the second end wall. a cylindrical conduction pipe that guides the extinguishing gas injected from the injection head to the first silencing chamber, which is an internal space defined by the peripheral wall, the first end wall, and the barrier; a plurality of cylindrical ventilation pipes that guide extinguishing gas in the second silencing chamber, which is an internal space defined by the second end wall and the barrier, to the outside;
A plurality of through holes are formed in the barrier to penetrate in the thickness direction of the barrier,
The conduction tube is formed with a connection part that is removably connected to the injection head at one end in the axial direction of the conduction tube, an end plate is formed at the other end in the axial direction of the conduction tube, and an end plate is formed at the other end in the axial direction of the conduction tube. A plurality of through holes are formed in the portion protruding into the silencing chamber 1 so as to penetrate in the thickness direction of the peripheral wall of the conduit pipe,
A gas fire extinguishing system characterized in that the plurality of ventilation pipes are arranged on an axis perpendicular to the axis of the peripheral wall at equal angles in the circumferential direction with respect to the axis of the peripheral wall, and are formed by penetrating the peripheral wall. .

消音装置は周壁と第１の障壁と取付け部を有する第２の端壁と障壁とを含み、取付け部によって噴射ヘッドに着脱可能に取付けられる。連結部によって噴射ヘッドに連結される導通管に形成される複数の透孔から第１の消音室に高速で噴射された消火ガスは、障壁に形成される複数の透孔から第２の消音室に放出される。第２の消音室に放出された消火ガスは、通気管を介して消音装置の外部へ放出される。消音装置は、導通管に形成される複数の透孔から高速で噴射された消火ガスを第１の消音室内の空間および第２の消音室内の空間で膨張させることによって、通気管での流速を下げるので、通気管からの消火ガス放出による音響の発生が抑制される。 The muffler includes a peripheral wall, a first barrier, a second end wall having an attachment portion, and a barrier, and is removably attached to the ejection head by the attachment portion. The extinguishing gas is injected at high speed into the first silencing chamber from the plurality of through holes formed in the conduit pipe connected to the injection head by the connecting part, and is then transferred from the plurality of through holes formed in the barrier to the second silencing chamber. is released. The extinguishing gas discharged into the second muffling chamber is discharged to the outside of the muffler via the ventilation pipe. The silencer reduces the flow velocity in the ventilation pipe by expanding extinguishing gas injected at high speed from a plurality of through holes formed in the conduction pipe in the space inside the first sound deadening chamber and the space inside the second sound deadening chamber. This suppresses the generation of sound caused by the release of extinguishing gas from the ventilation pipes.

（１２）消音装置は、前記消音装置は、筒状の周壁と、周壁の軸線方向一端部に、該周壁の軸線に垂直に形成される端壁と、噴射ヘッドに着脱可能に形成される取付け部と、周壁、端壁および噴射ヘッドによって規定される内部空間に収容される、多孔質の金属から成る吸音材とを含むことを特徴とするガス消火設備。 (12) The silencer includes a cylindrical peripheral wall, an end wall formed perpendicularly to the axis of the peripheral wall at one end in the axial direction of the peripheral wall, and a mounting removably formed on the injection head. Gas fire extinguishing equipment, characterized in that it includes a sound absorbing material made of porous metal and housed in an internal space defined by a peripheral wall, an end wall, and an injection head.

吸音材は、多孔質の金属から成り、内部空間に収容される。このような吸音材をノズル孔の直後に設けることによって、枝管側から供給される消火ガスを徐々に減圧膨張し、その流速を下げることができる。これによって、消火ガスの噴射に起因する噴射音の発生を抑制することができる。 The sound absorbing material is made of porous metal and is housed in the interior space. By providing such a sound absorbing material immediately after the nozzle hole, the extinguishing gas supplied from the branch pipe side can be gradually depressurized and expanded, and its flow rate can be lowered. This makes it possible to suppress the generation of injection noise caused by the injection of extinguishing gas.

（１３）消音装置は、前記吸音材は、周壁の軸線方向一端部に設けられる第１吸音材と、前記軸線方向他端部に設けられる第２吸音材とを含むことを特徴とするガス消火設備。 (13) The sound-absorbing device is characterized in that the sound-absorbing material includes a first sound-absorbing material provided at one end in the axial direction of the peripheral wall, and a second sound-absorbing material provided at the other end in the axial direction. Facility.

吸音材は、周壁の軸線方向一端部に設けられる第１吸音材と、前記軸線方向他端部に設けられる第２吸音材とを含むので、ノズル孔の直後で枝管側から供給される消火ガスを第１吸音材によって徐々に減圧膨張し、その流速を下げることができるとともに、噴射直前
に第２吸音材によって消火ガスをさらに減圧膨張し、その流速を下げることができる。これによって、消火ガスの噴射に起因する噴射音の発生をさらに抑制することができる。 The sound absorbing material includes a first sound absorbing material provided at one end in the axial direction of the peripheral wall and a second sound absorbing material provided at the other end in the axial direction, so that the fire extinguishing material supplied from the branch pipe immediately after the nozzle hole The gas can be gradually expanded under reduced pressure by the first sound-absorbing material to lower its flow velocity, and the extinguishing gas can be further expanded under reduced pressure by the second sound-absorbing material immediately before injection to lower its flow velocity. Thereby, it is possible to further suppress the generation of injection noise caused by the injection of extinguishing gas.

（１４）消音装置は、前記第１吸音材と前記第２吸音材との間に設けられる、第３吸音材をさらに含むことを特徴とするガス消火設備。 (14) A gas fire extinguishing equipment characterized in that the silencer further includes a third sound absorbing material provided between the first sound absorbing material and the second sound absorbing material.

第１吸音材と第２吸音材との間には、第３吸音材が設けられるので、第３吸音材によって、消火ガスの噴射流に起因する音響振動を吸収し、消火ガスの噴射に起因する噴射音の発生を抑制することができる。 Since the third sound-absorbing material is provided between the first sound-absorbing material and the second sound-absorbing material, the third sound-absorbing material absorbs the acoustic vibrations caused by the jet of extinguishing gas, and absorbs the acoustic vibrations caused by the jet of extinguishing gas. It is possible to suppress the generation of jet noise.

また、噴射ヘッドには導管の内周面に滑らかに連なる内周面を有するノズル孔が形成されるので、火災発生時に噴射ノズルのノズル部から消火ガスが噴射されても大きな噴射音が発生することを防止することができる。 In addition, since the injection head is formed with a nozzle hole that has an inner circumferential surface that smoothly connects to the inner circumferential surface of the conduit, a loud injection sound will be generated even if extinguishing gas is injected from the nozzle part of the injection nozzle in the event of a fire. This can be prevented.

また、噴射ヘッドと導管との間に消音装置が設けられるので、火災発生時に噴射ノズルのノズル部から消火ガスが噴射されても大きな噴射音が発生することを防止することができる。 Furthermore, since a silencer is provided between the injection head and the conduit, it is possible to prevent loud injection noise from being generated even if extinguishing gas is injected from the nozzle portion of the injection nozzle in the event of a fire.

１１ ガス噴射部
１２ ノズル部
１３，５０，５０ａ 噴射ヘッド
１４ 導管
１５ 消火ガス供給源
１６，７１ ノズル孔
１７，１７ａ～１７ｈ，６０，６０ａ 消音装置
１８ 分岐管
１９ 枝管
２０ 基台
２１ ブラケット
２２ 締結具
２３ 主管
２５，３５，４１，６１，８１ 周壁
２６，３６，４２，６４，６４ａ，６５，８２，８４ 端壁
２７，３７，４３，６２，６３，８３，１２３ 取付け部
２８ 噴射方向下流側に臨む部分
２９ 内筒体
３０，６６，６７，８５１，８７４ 透孔
３１ 円筒部
３２，８７２ 端板
３３ 吸音材
３４ ガス放出孔
３８，４４ 通気孔
３９，４５ 内部空間
４０，４６ 吸音材
５１，５２ 内周面
５５ エッジ部７２ 案内部
８５ 障壁８６，８８ 消音室
８７ 導通管８９，８９ａ 通気管
１２５ 吸音材１３４ 第１吸音材
１３５ 第２吸音材
１３６ 第３吸音材
８７１ 連結部
８９１ 金網
８９２，８９２ａ 消火ガス噴射口
Ｄ１，Ｄ２ 内径 11 Gas injection part 12 Nozzle part 13, 50, 50a Injection head 14 Conduit 15 Fire extinguishing gas supply source 16, 71 Nozzle hole 17, 17a to 17h, 60, 60a Silencer 18 Branch pipe 19 Branch pipe 20 Base 21 Bracket 22 Fastening Tool 23 Main pipe 25, 35, 41, 61, 81 Surrounding wall 26, 36, 42, 64, 64a, 65, 82, 84 End wall 27, 37, 43, 62, 63, 83, 123 Mounting part 28 Downstream side in injection direction Portion facing 29 Inner cylindrical body 30, 66, 67, 851, 874 Through hole 31 Cylindrical portion 32, 872 End plate 33 Sound absorbing material 34 Gas discharge holes 38, 44 Ventilation holes 39, 45 Internal space 40, 46 Sound absorbing material 51, 52 Inner peripheral surface 55 Edge portion 72 Guide portion 85 Barriers 86, 88 Sound deadening chamber 87 Conduction tubes 89, 89a Ventilation tube 125 Sound absorbing material 134 First sound absorbing material 135 Second sound absorbing material 136 Third sound absorbing material 871 Connecting portion 891 Wire mesh 892, 892a Fire extinguishing gas injection port D1, D2 inner diameter

Claims (2)

配管に螺合する噴射ヘッドと、
前記噴射ヘッドから噴射される消火ガスが通過する多孔質金属からなる吸音材とを備え、
前記噴射ヘッドは、前記配管から消火ガスが供給されるノズル部と、前記吸音材よりも大径である外周面とを有し、
前記噴射ヘッドの前記ノズル部から高速で噴射された消火ガスを、前記吸音材で拡散させて徐々に減圧膨張させてその流速を下げることで消音し、
前記吸音材は、前記配管に近い側の第一平面、前記第一平面と対向配置されて前記配管から遠い側の第二平面、前記第一平面および前記第二平面の間に設けられた周面とを有しており、前記第一平面から前記第二平面まで前記吸音材が隙間なく詰められており、
前記第二平面および／または前記周面側に消火ガスを放出し、前記第一平面側に消火ガスを放出せず、前記吸音材の前記第二平面は、前記噴射ヘッドに螺合する部材によって支持されている、消音装置。 an injection head that screws into the pipe;
and a sound absorbing material made of porous metal through which the extinguishing gas injected from the injection head passes,
The injection head has a nozzle portion to which extinguishing gas is supplied from the piping, and an outer peripheral surface having a larger diameter than the sound absorbing material,
The fire extinguishing gas injected at high speed from the nozzle part of the injection head is diffused by the sound absorbing material and gradually expanded under reduced pressure to reduce the flow velocity, thereby muffling the sound;
The sound absorbing material has a first plane on a side close to the piping, a second plane facing the first plane and far from the piping, and a circumference provided between the first plane and the second plane. and the sound absorbing material is packed without any gaps from the first plane to the second plane,
Extinguishing gas is released to the second plane and/or the peripheral surface side, and extinguishing gas is not released to the first plane side, and the second plane of the sound absorbing material is formed by a member screwed to the jetting head. Supported, silencer. 請求項１に記載の消音装置と、前記消音装置に消火ガスを供給する前記配管とを備えた、ガス消火設備。 A gas fire extinguishing facility comprising the silencer according to claim 1 and the piping that supplies extinguishing gas to the silencer.
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