FIRE-EXTINGUISHING GAS INJECTION DEVICE AND GAS FIRE-EXTINGUISHING EQUIPMENT

• Main Author: GOTO HIDEAKI
• Format: Patent
• Language: English; Japanese
• Published: 01.11.2018
• Subjects: ACOUSTICS; ACOUSTICS NOT OTHERWISE PROVIDED FOR; FIRE-FIGHTING; HUMAN NECESSITIES; LIFE-SAVING; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; MUSICAL INSTRUMENTS; PHYSICS; SOUND-PRODUCING DEVICES

To control noise due to rapid decompression expansion of fire-extinguishing gas.SOLUTION: The gas injection device includes: an injection head (13) having a nozzle part (12); a sound absorption material (125) composed of porous metal in which fire-extinguishing gas discharged from the nozzle part flows; a ring member (122) which fastens the sound absorption material by coming into contact with the sound absorption material; and a connection member (129) which connects the injection head and the ring member. The nozzle part is provided with nozzle holes (16). The sound absorption material is provided with one end face (125b) for discharging fire-extinguishing gas and with the other end face (125a) for facing the opening of the nozzle holes, and is capable of directly flowing the fire-extinguishing gas discharged from the nozzle holes into the porous metal from the other end face. The connection member contains a screw part (123) that can be screwed onto the injection head, with one end face atmospherically opened excepting a part in contact with the ring member.SELECTED DRAWING: Figure 13 【課題】消火ガスの急激な減圧膨張に起因する騒音を抑制する。【解決手段】ノズル部（１２）を有する噴射ヘッド（１３）と、ノズル部から放出される消火ガスが流入する多孔質金属からなる吸音材（１２５）と、吸音材に接触して吸音材を固定するリング部材（１２２）と、噴射ヘッドとリング部材とを接続する接続部材（１２９）とを備えたガス噴射装置であって、ノズル部にはノズル孔（１６）が設けられており、吸音材は消火ガスを放出する一方端面（１２５ｂ）と、ノズル孔の開口と対面する他方端面（１２５ａ）を有し、ノズル孔から放出される消火ガスを多孔質金属内へ他方端面から直接流入させることができ、接続部材は、噴射ヘッドに螺合することが可能な螺合部（１２３）を含み、一方端面は、リング部材に接する部分を除いて大気開放されている。【選択図】図１３