A - Human Necessities – 62 – C
Patent
A - Human Necessities
62
C
299/22, 137/67
A62C 35/68 (2006.01)
Patent
CA 2000422
A b s t r a c t Fire extinguishing plant for three extinguishing agents, water, powder-mixed water and heavy foam, comprising water supply conduits (4, 5, 6) from a source of pressurized water to a number of spraying nozzles (2, 3), and wherein there to the water supply conduits (4, 5, 6) being provided an inlet (7) for admizing foam agent. Moreover, to each nozzle (2, 3) there being provided supply conduits (9, 10, 11) for a non- combustible gas, said conduits having a device (13) for admixing fire extinguishing powder into the gas. The supply conduits for the non-combustible gas have a non-return valve (28) adjacent the outlet; there being provided a bypass conduit (14) in the gas supply conduit past the device (13) for the admixing of powder. An arrangement in spraying nozzles for use in the plant comprises a preferably circular housing (15), one end of which is closed, the other end thereof being open and having a radially extending annular flange (32). At the open end, there being provided a disc-shaped valve plate (18) having radial grooves (30) in the inner surface, corresponding to likewise radial grooves (31) in the outer surface of the flange (32). The valve plate (18) has a valve stem (19) which is fastened adjustably in the axial direction in the rear end of the housing (15). The valve stem (19) has a blind bore (26) from its inner end, adapted for connection of the supply conduit for gas-carried powder. In the wall of the blind bore there being provided a number of radial holes (27) equipped with non-return valve (28). (Figures 1 and 3)
Riches Mckenzie & Herbert Llp
Solheim Odd
LandOfFree
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