FOAM GENERATOR Russian patent published in 2012 - IPC A62C31/12 

FIELD: fire fighting.

SUBSTANCE: foam generator has a sprayer connected to the casing of the ejecting nozzle, made in the form of a diffuser set axisymmetrically with respect to the sprayer. A mesh divider of two-phase flow is installed on a section of the diffuser. The sprayer consists of an throttling washer with an annular rib facing the nozzle with a flange perpendicular to the axis of the throttling washer and the hole axle made in the nozzle, and the flange is rigidly connected to the annular rib to form a cylindrical expansion chamber, and in the throttling washer there is one central through hole, and at least two rows of through holes concentrically arranged in circles, in each row at least three holes are made, and the values of the diameters of the holes decrease from the center hole to the peripheral. On the casing of the ejecting nozzle made in the form of a diffuser, in the part located close to the sprayer, at least three windows for ejection of air are made, and at the outlet of the diffuser a mesh divider of two-phase flow is fixed, made in the form of two series-connected networks, one of which has a shape of a circle, and the other has a shape of a hemisphere.

EFFECT: increased efficiency of spraying of fire-extinguishing liquid solution of foaming agent (high-expansion polydisperse foam).

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