SU1314994A1 - Foam generator - Google Patents

Abstract

The invention relates to fire suppression, can be used in installations for foam extinguishing fires and improves the economics of using the frother solution. When the foam generator works with the help of the rotor 4 and the foam-generating grid -6, the structure of the foam is formed. Next, the foam enters the trays 7, where fluid is sucked through a moisture-permeable material 8 ns foam, which collects through the collector II in the collector and through the shut-off fittings 15 enters the conduit 5 to supply the foaming solution. A vacuum in the collector is created due to its connection with the suction cavity of the blower 1, in the inlet of which a regulating flap is installed. 16. 1 h.p. f-ly, 1 sludge. (L I I 5 6 CO CO with 4 12/5/4 13 8

Description

FIELD OF THE INVENTION The invention relates to fire suppression and can be used in foam fire extinguishing installations.

The purpose of the invention is to increase the use of the foaming agent solution.

The drawing schematically shows a foam generator, a general view.

The foam generator consists of a blower 1 with a suction 2 and an injecting 3 cavities and a rotor 4. To the bottom of the blower, a pipeline 5 for feeding the formation solution is connected, on the rotor of the blower a foam generating grid 6 is made in the form of a cylinder. The foam drainage system consists of a stack of trays 7 inclined towards the exit of the foam installed in the blower cavity and covered with a moisture-permeable material 8 on top. All trays through openings 9 in the bottoms 10 are connected to a collection of foaming solution through openings 9 in the bottoms 10 12, on top of which is connected by means of a nozzle 13 to the suction cavity of the blower. From below, the collection of the foaming solution with the help of the pipeline 14 through the valves 15 is connected with the pipeline 5 of the supply of the foaming solution. A regulating flap 16 is installed in the suction cavity of the blower. Fiberglass is used as moisture permeable material.

The foam generator works as follows.

The foaming solution through the supply pipeline 5 enters the inlet cavity of blower 1 and is maintained at a certain level. When the rotor 4 is rotated with the foaming grill 6, it is wetted, and the incoming air flow forms the foam structure regarding the level of the solution. Next, the foam enters the injection cavity 3 and passes between the trays 7. Liquid draining from the foam gets onto the liquid-receiving surface of the material 8 of the trays 7. By adjusting the position of the flap 16, an air vacuum in the suction cavity of the blower is created, which is transferred to the foam solution collection, from there through the collector 11 into the trays 7 and through the pores of the material 8, suction occurs

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liquids from the foam and its collection in the lower part of the collector, from where it can go through the shut-off valves 15 to the foaming solution supply line 5 and into the suction cavity of blower 1 for reuse in the foaming process. By changing the position of the control valve 16, at different speeds, the rotor 4 of the blower 1, and therefore, with different performance of the foam generator, you can drain the foam with different degrees, thereby increasing its multiplicity.

When using the invention, the consumption of the foaming solution (including all losses) is reduced at least 3 times mainly due to the increase in the multiplicity of the foam and the reuse of the foaming solution.

Claims (2)

1. A foam generator containing a blower with a suction and discharge cavities and a rotor, a supply pipe for the foaming solution connected to the blower, mounted on the outer surface of the rotor of the foam-generating grid, made in the form of a cylinder, so that efficient use of the foaming agent solution; it is equipped with a foam sucking system, made in the form of a package of moisture-permeable material trays with a collector installed in the blower cavity, sat rnika foamable solution to the nozzle and control valve, wherein the bottom tray mounted with a bias toward the foam outlet and are at the bottom of the openings for communicating via a manifold with a collection of foaming solution, made in the form of a closed container, the upper part of which is connected by a pipe with the suction cavity of the blower, and the lower part - with the pipeline for supplying the foaming solution, with the regulating flap installed in the suction cavity of the blower. 2. The foam generator according to claim 1, wherein it is applied so that glass fabric is used as a moisture-permeable material.