SPRAY HEAD FOR GASEOUS FIRE-EXTINGUISHING EQUIPMENT HAVING SILENCING FUNCTION

PROBLEM TO BE SOLVED: To provide a spray head for gaseous fire-extinguishing equipment, suppressing noise generated when discharging gas.SOLUTION: A spray head 1 of gaseous fire-extinguishing equipment includes: an orifice part 120 for controlling a gas flow rate; a silencing member 14 consisting of a porous material or a fibrous material, provided at a downstream side of the orifice part 120, and suppressing noise caused by discharge of fire-extinguishing gas; and an outer shell 16 for protecting the silencing member 14. The outer shell 16 has a plurality of openings 160 for passing the fire-extinguishing gas. A sum area of cross-section areas of the respective openings 140 for passing the gas, of the silencing member 14 is larger than the cross-section area of an opening 120a of the orifice part 120, a sum area of the cross-section areas of the respective openings 160 for passing the gas, of the outer shell 16 is larger than the cross-section area of the opening 120a of the orifice part 120, and the sum area of the cross-section areas of the respective openings 160 for passing the gas, of the outer shell 16 is larger than the sum area of the cross-section areas of the respective openings 140 for passing the gas, of the silencing member 14.SELECTED DRAWING: Figure 1 【課題】ガス系消火設備の噴射ヘッドにおいて、ガス放出の際に発生する騒音を抑制する。【解決手段】ガス流量を制御するオリフィス部１２０と、多孔質材または繊維状材からなりオリフィス部１２０の下流側に設けられ消火ガス放出に伴う騒音を抑制する消音部材１４と、消音部材１４を保護する外殻１６とを有し、外殻１６は消火ガスを通過させる複数の開口部１６０を有しており、消音部材１４におけるガスが通過する各開口１４０の断面積を合計した面積は、オリフィス部１２０の開口１２０ａの断面積よりも大きく、外殻１６におけるガスが通過する各開口部１６０の断面積を合計した面積は、オリフィス部１２０の開口１２０ａの断面積よりも大きく、外殻１６におけるガスが通過する各開口部１６０の断面積を合計した面積は、消音部材１４におけるガスが通過する各開口１４０の断面積を合計した面積よりも大きいガス系消火設備の噴射ヘッド１である。【選択図】図１