Title:
FIRE EXTINGUISHING GAS INJECTION DEVICE
Document Type and Number:
Japanese Patent JP2017209524
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To suppress noise attributed to rapid decompressing and expanding of fire extinguishing gas.SOLUTION: A gas injection device comprises: an injection head (13) with a nozzle part (12); a sound absorption material (125) made of porous metal into which fire-extinguishing gas discharged from the nozzle part flows; a ring member (122) that contacts the sound absorption material and fixes the sound absorption material; and a connection member (129) that connects the injection head and the ring member. The nozzle part is provided with a nozzle hole (16), and the sound absorption material has one end surface (125b) for discharging fire-extinguishing gas, and the other end surface (125a) facing an opening of the nozzle hole so that fire-extinguishing gas discharged from the nozzle hole can be caused to directly flow into the porous metal from the other end surface. The connection member includes a screwing part (123) that can be screwed into the injection head, and the one end surface is open to the atmosphere except the portion that contacts the ring member.SELECTED DRAWING: Figure 13
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Inventors:
GOTO HIDEAKI
Application Number:
JP2017152528A
Publication Date:
November 30, 2017
Filing Date:
August 07, 2017
Export Citation:
Assignee:
AIR WATER SAFETY SERVICE INC
International Classes:
A62C31/02; A62C31/28
Domestic Patent References:
| JP2011125673A | 2011-06-30 | |||
| JPS58103100U | 1983-07-13 | |||
| JPH0626322A | 1994-02-01 |
Foreign References:
| EP1151800A2 | 2001-11-07 | |||
| WO2008108538A1 | 2008-09-12 |
Attorney, Agent or Firm:
Fukami patent office