Fire extinguishers – Fluid systems – Plural source – mixing in transit
Patent
1989-08-14
1990-08-28
Peters, Jr., Joseph F.
Fire extinguishers
Fluid systems
Plural source, mixing in transit
169 9, 169 14, A62C 3544, A62C 3534, A62C 3516
Patent
active
049517546
ABSTRACT:
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 admixing foam agent. Moreover, to each nozzle (2, 3) therein being provided supply conduits (9, 10, 11) for a non-combustible gas, siad 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), on 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).
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Kannofsky James M.
Peters Jr. Joseph F.
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