FIRE BARRIER Russian patent published in 2008 - IPC A62C4/00 

FIELD: fire-fighting equipment, particularly fire barriers to suppress steam-and-air combustible mixes.

SUBSTANCE: fire barrier comprises body with inlet and outlet orifices and barrier members installed in axial direction thereof. The barrier members have double porous structure including opened large pores for gas penetration and additional opened small pores or capillaries formed in large pore bridges and adapted to be filled with liquid due to capillary force. Partitions of article or material having low gas permeability are arranged between barrier members and the body. The partitions have gas channels made in different partitions and defining zigzag labyrinth path. Barrier members and partitions are partly immersed in bath containing liquid and located in lower body part. Pore channels of barrier members have dimensions increasing from inlet body orifice towards outlet body orifice. Barrier partitions may be created of highly-porous open-cell heat-resistant material formed of metal or ceramics and having structure simulating open-cell polyurethane foam structure. The partitions may be made of liquid permeable article with small pores or capillaries to be filled with liquid due to capillary effect, for instance of compressed fibers or fabric or felt or ceramics or metal.

EFFECT: decreased resistance to gaseous mixture flow, reduced fire barrier size, extended life of fire barrier exposed to open flame.

4 cl, 1 dwg