The invention discloses an ultrafine
dry powder cold gas
sol fire extinguishing device which comprises an ultrafine
dry powder fire-extinguishing agent storing container, an ultrafine
dry powder spray device and a high-pressure gas drive device, wherein the ultrafine dry
powder fire-extinguishing agent storing container is provided with a gas inlet and a
powder spray opening; the ultrafine dry
powder spray device is sealed and connected with the
powder spray opening; the high-pressure gas drive device is sealed and connected with the gas inlet; the ultrafine dry
powder spray device comprises a
powder spray pipe, an ultrafine dry powder outlet
nozzle, a dry powder spray sealing membrane which is arranged in the powder spray
pipe and a fan which is arranged in the front or the back of the ultrafine dry powder outlet
nozzle; and the high-pressure gas drive device comprises a gas storing
bottle which is connected with the gas inlet through a gas inlet pipeline, a gas circuit control valve and an inflating and connecting
pipe which is inserted into the storing container and is provided with a gas inlet
nozzle. The invention has reasonable design, simple structure, low
processing and manufacture cost, simple and convenient use and operation, convenient distribution, high fire extinguishing speed, high fire extinguishing efficiency,
environmental protection and no
pollution, and simultaneously can be effectively suitable for areas needing fire extinguishment, such as wells, roads, cable chutes, tunnels, subways, and the like.