LIQUID SPRAYER AND FIRE-EXTINGUISHER Russian patent published in 2005 - IPC

FIELD: fire-fighting equipment and liquid sprayers for various applications.

SUBSTANCE: liquid sprayer has body with inlet connection pipe, centrifugal liquid flow swirler and nozzle with profiled channel. Centrifugal swirler is made as hollow cylindrical insert with inlet axial channel and at least four tangential inlet channels formed in side wall of the insert. Transversal sections of inlet centrifugal swirler channels are dimensioned such that 4S₀≤S_t≤6S₀, where S_t is summary area of tangential channel sections, S₀ - is area of axial channel section. Four tangential channels may be formed in side wall of hollow insert. The tangential channels may be equidistantly spaced along a circle. Axes of symmetry defined in adjacent channels are transversal one to another. Cylindrical insert cavity communicates with inlet orifice of profiled nozzle channel including part tapering in liquid flow direction. Profiled outlet nozzle channel may comprise inlet part converging in liquid flow direction and diverging outlet part. The inlet and outlet parts are arranged one after another. Parts of profiled nozzle channel have conical or conoidal shape. Fire-extinguisher comprises tank with fire-extinguishing liquid, system for liquid displacement from the tank, shutoff-and-triggering device, liquid sprayer provided with centrifugal liquid flow swirler and outlet nozzle. Fire-extinguisher also has pipeline to connect shutoff-and-triggering device with liquid sprayer. The liquid sprayer generates gas-and-liquid jet with spray angle of 17-23°.

EFFECT: increased velocity and uniform liquid droplet dimensions in the jet, possibility to create gas-and-liquid jet with fixed spray angle.

10 cl, 4 dwg