Fire-extinguishing gas injection system, gas fire-extinguishing system equipped with the same, and installation method of fire-extinguishing gas injection system

摘要

PROBLEM TO BE SOLVED: To provide a gas fire extinguishment device capable of attenuating sound caused by jetting flow of fire extinguishment gas from a jetting head and obtaining jetting and noise-reducing properties adjusted accurately.SOLUTION: A jetting head body 101 is configured by arranging a nozzle member 339 in the jetting head body 101 connected to a conduit 14 guiding fire extinguishment gas. Noise reduction means 102 includes a second noise reduction material 108 where a plurality of disc-shaped members comprising a porous material are laminated. The second noise reduction material 108 is held and fixed by an attachment member 127 between a fitting part 138 of the jetting head body 101 and a pressing member 128. A peripheral face 124 of the second noise reduction material 108 is opened to ambient air.SELECTED DRAWING: Figure 3