DEVICE FOR FIGHTING OF UNDERGROUND FIRES Russian patent published in 1996 - IPC

FIELD: devices for fighting and prevention of underground fires in coal mines. SUBSTANCE: in burning of installed in store pyrotechnical gas generator, which are automatically actuated successively by pairs, hot gas is formed which under the pressure enters cylindrical body, where the heat of gas flow is utilized for evaporation and gasification of liquid nitrogen in the evaporator and heat-exchanger pipes. Gasified nitrogen flows in gas stream produced by explosive charges. Total gas flow through conductor enters the mixing chamber, where it is mixed with fire-extinguishing powder which is sucked-in from receiving ben. Formed dust-gas mixture through diffuser is thrown in form of aerosol jet to fire seat or transported through pipeline for preventive treatment of worked out space. EFFECT: higher efficiency fighting of underground fires due to use of autonomous sources of gas. 1 dwg