FOAM GENERATOR Russian patent published in 2014 - IPC A62C8/00 

FIELD: fire safety.

SUBSTANCE: invention is intended for use in automatic fire-extinguishing systems by generating high-expansion polydisperse foam under conditions of smoking the room while blocking the quick-burning products with high-expansion polydisperse foam. At that the foam generator consists of a sprayer, an ejecting nozzle and the two-phase flow divider. At that the sprayer is connected to the housing of the ejecting nozzle made in the form of a diffuser mounted axially relative to the sprayer on the housing of the ejecting nozzle, at a part located closer to the sprayer at least three windows are made for ejecting air, and at the output the two-phase flow divider is mounted, made in the form of a circle of mesh or the perforated material. At that the sprayer housing consists of two concentric interconnected cylindrical sleeves: the sleeve of larger diameter and the sleeve of smaller diameter. At that in the sleeve of smaller diameter, coaxially to it, a screw is located, rigidly connected to its inner surface, for example press-fitted into it. At that the outer surface of the screw is a helical groove, and inside the screw there is one central through hole and at least two rows of through holes located concentrically circumferentially. At that in each row at least three holes are made, and the diameter of the holes decreases from the central hole to the periphery ones, and in the sleeve of greater diameter, coaxially to it, a fitting is located, rigidly mounted in it, for example by a threaded connection, through a sealing gasket. At that inside the fitting a cylindrical hole is coaxially made, passing into a diffuser axially located, which is connected to the cylindrical chamber formed by the inner surface of the sleeve of smaller diameter and the end surface of the screw made of hard material.

EFFECT: improvement of efficiency of spraying the fire-extinguishing liquid foam solution due to high-expansion polydisperse foam.

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