ACTIVE FIRE BULKHEAD Russian patent published in 1994 - IPC

FIELD: fire-control facilities. SUBSTANCE: bulkhead comprises partition, hollow cylindrical member arranged horizontally in said partition and having pressure-tight covers at the ends, foam sprayer accommodated in cylindrical member, and foam-generating grate. Partition is inflatable and has surplus-pressure valve. Cylindrical member is made of hollow rims interconnected by parallel tubular rods whose cavities intercommunicate with rim spaces. The rim has a liquid nitrogen supply pipe while another rim has nozzles directed into cavity of tubular member. Foam-generating grate encompasses tubular rods and is made of filtering netting fabric. Foam sprayer can move along cavity of cylindrical member. Bulkhead incorporates a gas-generating device with a nozzle communicating with cavity of cylindrical member and is disposed in cover at the side of operating mine working. A pendentive partition positioned at the surplus pressure valve side of inflatable partition has a surplus pressure valve . EFFECT: improved design. 2 cl, 1 dwg