SU1147414A2 - Universal froth generator - Google Patents

Abstract

UNIVERSAL FOAMENERATOR auth. No. 955950, characterized in that, in order to increase the foaming efficiency by adjusting the direction of the gas flow, the nozzles are hinged on the annular manifold and have stops on the movable part, and limiters for contacting the nozzle stops are installed on the confuser forming part.

Description

74 // h3 / 24 §U.

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1

The invention relates to fire fighting equipment, in particular to foam generator designs, and can be used to make foam in extinguishing fires.

According to the main auth. No. 955950 is known a universal foam generator comprising a housing with a spray agent solution of a frother and an annular collector for supplying compressed air, nozzles with windows, made in the form of a truncated cone with a smaller base fixed at the end of the atomizer large on the collector, while the atomizer and the collector are installed with a returnable translational movement and fixation relative to the body; removable plugs are installed in the windows of the nozzle lj.

The disadvantage of this foam generator is that the efficiency of the foaming tank in the mode of generating and transporting foam with the ejection of the young channels behind is closed. by uneven distribution of gas flow over the surface. package nets.

The purpose of the invention is to increase the efficiency of foaming by adjusting the direction of the gas flow.

This goal is achieved by the fact that, in the universal foam generator, the nozzles are hinged on the annular manifold and have stops on the movable part, and limiters are installed on the generator of the confuser for contacting the nozzle stops.

FIG. 1 shows the universal foam generator of FIG. 2 - ring collector with nozzles.

The foam generator contains a body 1, made in the form of a confuser with fl o and 2, throat 3 with a diffuser 4, an adapter 5 with a viewing window 6, a pressure gauge 7 and a flange 8 for connecting to the main pipeline, folding bolts 9 and a package of nets 10.

On the body of the foam generator there is a crosspiece 11 with a guide sleeve 12 and a latch 13. Inside the crosspiece 11 there is a conical nozzle 14, made in the form of a truncated cone and fixed with a smaller base at the end of the sprayer 15, which is inserted into the holder 12

with the possibility of reciprocating motion and fixation relative to the body. On a larger base, the nozzle 14 is fixed to the flange 16, which is integral with the annular gas manifold 17 and inlet fitting 18. The conical nozzle 14 has windows 19 with removable plugs for the ejection of air to generate foam during operation of the foam generator. Gas manifold 17 contains twelve nozzles, some of which, for example, 20-23 are rotary relative to the longitudinal axis and provided with stops 24. Another part of the nozzles, for example, 25-28 is fixed rigidly with the displacement of the longitudinal axes to the center of the foam generator cassette. The last group of nozzles 29-32 is located parallel to the longitudinal axis of the foam generator. The movable nozzles by means of the stops 24 are in contact with the limiters 33, which are fixed to the confusor of the housing 1 and provide a predetermined reversal of the gas flow.

When the universal foam generator is in operation, a spray jet of an aqueous solution of the formative agent leaves the sprayer 15 under pressure and ejects air through the windows 19 from the surrounding space. Air also flows through the channels between the flange 16 and the housing 1. The air formed with the mixture with the solution drops passes through the collector ring 17 and enters the TO mesh package where the foam generation process takes place. At the same time, in order to reduce the oxygen content in the foam and to provide it with additional kinetic energy, inert manifold 17 is fed to manifold 18. gas, for example, nitrogen. Regulation of the foam ratio and foam generator performance is carried out by changing the flow area of the ejection windows 19, installing or removing caps and the width of the channel between the flange 16 and the body 1 of the movable conical nozzle 14.

To increase the transportation distance of the foam flow, the foam generator is connected with a flange 8 to the main pipeline, and the cone nozzles 14 are fixed to the housing 1 with hinged bolts 9. At the same time, the rotary nozzles in the process

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the movements of the nebulizer 15 enter into contact with their stops 24 with the limiters 33 and rotate, redistributing the gas flow to the contour part of the grid packet 10. Simultaneously supplying the foaming agent solution to the diffuser 15 and the inert gas to the collector 17 provides foam generation and transportation. If it is necessary to make foam injection through a pipeline under pressure, ejection windows 1 overlap 19 with plugs.

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The use of the proposed foam generator provides the best conditions for the distribution of the gas flow over the surface of the grids in period 5 without ejection foam generation, which generally leads to an increase in the foam injection rate under pressure, improves the foam flow structure. At the same time, the frother consumption per unit of foam volume is reduced and the effectiveness of mine rescue operations increases.

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Claims (1)

UNIVERSAL FOAM GENERATOR for ed. No. 955950, characterized in that, in order to improve pricing efficiency by regulating the direction of the gas flow, the nozzles are mounted on the annular manifold pivotally and have stops on the movable part, and limiters for contact with the stops are installed on the generatrix of the confuser. nozzles. >