FOAM GENERATOR OF EJECTION TYPE WITH VORTICAL SPRAYER Russian patent published in 2012 - IPC B05B7/00 

FIELD: fire-prevention facilities.

SUBSTANCE: invention relates to the field of fire-fighting equipment and is designed for use in automatic systems of fire-fighting by generation of a high-expansion polydisperse foam under conditions of room smoke screening by blockage of quick-burning products with a high-expansion polydisperse foam. In a foam generator there is a vortex sprayer, which is connected to a foam nozzle vessel arranged in the form of a diffuser formed by a truncated cone. The smaller base of the truncated conical surface of the diffuser is fixed at the output of the splitter. The diameter of this base is equal to the diameter of the output hole of the sprayer. The conical shell of the diffuser is installed axially relatively to the sprayer. On the foam nozzle vessel in part located closer to the sprayer there are three windows arranged for air ejection. At the outlet there is a meshed splitter of a double-phase flow arranged in the form of a cone. The top of the conical surface lies on the axis of the vessel and faces towards the sprayer. The round base of the cone matches the cut of the output hole of the diffuser. The vortex sprayer comprises a bushing axial to a foam nozzle vessel. At one side of the nozzle there is a partition arranged perpendicularly to its axis connected to an inlet nozzle with a hole to supply a foaming and a fire-quenching solution into a vortex chamber. The chamber is fixed coaxially on the inner surface of the sprayer's bushing and is made in the form of a cylindrical cavity connected by at least three tangential holes connected to the sprayer's cavity joined to a nozzle hole. The cylindrical cavity is formed by a ring axial to the foam nozzle vessel and two partitions. One of partitions facing the nozzle is arranged as dead, and the other one facing the diffuser is made with an outlet hole arranged axially to the ring.

EFFECT: higher efficiency of spraying a fire-quenching liquid solution of a foaming agent (a high-expansion polydisperse foam).

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