METHOD OF FIRE FIGHTING AND DEVICE FOR ITS EMBODIMENT Russian patent published in 1998 - IPC

FIELD: fire-fighting equipment for extinguishing of high-temperature fire seats. SUBSTANCE: medium-expansion foam is produced in foam generator by supplying through branch pipe of foam-forming solution and through other branch pipe, of gaseous nitrogen. Simultaneously in combustion chamber pyrotechnical gas is burnt by gas generators. Formed gas containing aerosol of inhibiting substances flows from ejector to foam barrel. Sucked to this place is foam-forming solution which mixes with pyrotechnical gas to form foam saturated with inhibitor. Foam assumes flat configuration in flat jet nozzles and after additional dispersion on lattice becomes high-expansion one. Produced at the device outlet is two-layer foam having in its upper layer inert covering foam and in the lower layer, fire-extinguishing inhibiting foam. EFFECT: higher efficiency. 4 cl, 1 dwg