FOAM GENERATOR OF EJECTION TYPE WITH SWIRL SPRAYER Russian patent published in 2014 - IPC A62C31/02 

FIELD: fire safety.

SUBSTANCE: foam generator comprises a sprayer, a foam nozzle and a two-phase flow divider. The sprayer is made of vortex-type and is connected to the housing of the foam nozzle made in the form of a diffuser formed by a truncated cone. The smaller base of the truncated conical surface of the diffuser is fixed to the output of the sprayer, at that the diameter of this base is equal to the diameter of the outlet of the sprayer, and the diffuser conical shell is mounted axially with respect to the sprayer. On the housing of the foam nozzle at a part closer to the sprayer at least three windows for ejecting air are made, and at the output a net two-phase flow divider is fixed. At that the vortex-type diffuser consists of a sleeve, axisymmetric to the housing of the foam nozzle on one side of which a partition is located perpendicular to its axis, which is connected to the input fitting with a hole for supply of foam generating and fire-extinguishing solution to the swirl chamber mounted coaxially on the inner surface of the sprayer sleeve and made in the form of a cylindrical cavity with at least three tangential holes connected to the cavity of the sprayer connected to the fitting hole, at that the cylindrical cavity is formed by a ring axisymmetric to the housing of the foam nozzle, and two partitions, one of which facing the fitting, is formed solid, and the other, facing the diffuser, is made with an outlet located axially to the ring. The net two-phase flow divider is made in the form of a round net disc fixed to the housing, which is attached to the first net cone with an apex lying on the axis of the housing and facing the sprayer, and the second net cone is fixed opposite to it, with its apex lying on the axis of the housing and facing away from the sprayer, and its base is a round net disc.

EFFECT: design improves efficiency of spraying of the fire-extinguishing foam generating solution.

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