SU869780A1 - Ejector foam generator - Google Patents

Description

(54) EJECTOR FOAM GENERATOR

one

The invention relates to fire fighting equipment, in particular, to devices for preparing fire-fighting air-mechanical foam, and can be used in extinguishing fires in underground mines, top buildings and structures and other public goods.

A device for forming an air-mechanical foam is known, comprising a housing with a manifold, a package of foam generating networks and a guide nozzle, and a spray gun comprising nozzles with holes AND

The disadvantage of the device is that ts is not very effective when the pressure of the foaming solution before the sprayer is changed.

The aim of the invention is to increase the efficiency of work.

The goal is achieved by the fact that the atomizer has a guide coaxially fixed on the nozzle of the atomizer and a valve with a return spring placed freely on the direction of the 25th outlet of the atomizer.

The drawing shows an ejector foam generator, a general view.

The foam generator consists of a housing I, a manifold 2, a guide nozzle 3,30

package foaming grids 4, spray 5 and the connecting head 6.

The atomizer 5 includes a housing 7 with nozzles 8 with tangentially positioned openings 9. In the center of the nozzle 8 there is a fixedly fixed guide 10, on which a valve 11 with a return spring 12 is freely placed at the outlet of the atomizer 5.

Works ejector foamer as follows.

An aqueous solution of the frother, entering under pressure into the nebulizer 5, exits from it and flows through the collector 2 into the housing 1. Passage through the collector 2, the foaming agent solution sprayed in the form of a torch ejects air and, mixing with it, enters the package of foam generating nets 4 on which air-mechanical foam is formed. Lastly, from a packet of npoxojpHT nets, through a guided nozzle 3, which forms a foamy stream into a monolithic stream, and is fed to the fire for a predetermined distance. When the pressure of the water solution of the foaming agent in front of the sprayer drops, the pressure on the valve 11 decreases, as a result of which the spring 12 does not push the valve 11 along the guide

10 to the nozzle 8 of the nebulizer 5, whereby the angle of opening of the torch of the peme-forming solution remains the same.

When; increasing the pressure of the solution before the atomizer, the pressure on the valve 11 will increase, and the valve 11 will move along the guide 10, compressing the spring 12. At the same time, the opening angle of the torch of the foaming solution will remain constant.

Ensuring an optimum constant opening angle of the flame of the foaming solution, regardless of the fluctuations in the pressure of the solution in front of the sprayer, ensures a uniform distribution of the solution on the foaming grids during the whole operation of the foam generator, which makes it work

nogenerator stable and more efficient.

Claims (1)

Claims. An ejector foam generator comprising a housing with a collector, a package J of foam generating grids and a guide nozzle and a spray gun comprising nozzles with holes, characterized in that, in order to increase the efficiency of operation, the sprayer has a guide coaxially mounted on the spray tip and valve with spring return, freely placed on the sprayer outlet guide. Information sources, taken into account during the examination I. USSR Copyright Certificate 470298, cl. A 62 C 5/04, 1973. about "