SU1400620A1 - Apparatus for putting out a fire - Google Patents

Abstract

FIELD: fire protection. The purpose of the invention is to increase the efficiency of the device and the efficiency of the consumption of the foaming agent solution by increasing the range of supply of high-fold foam with a one-time increase in its multiplicity and preservation of the structure. The device has a low-density foam generator and a foam solution collector connected via pipelines to the spray nozzle of a high-expansion foam ejection generator, a jet accelerator mounted coaxially with the nozzle, a spray gun and a low-multiplicity foam generator installed under the casing of the device in which passage holes are made pipelines. 3 hp f-ly. 3 il.

Description

The invention relates to fire fighting equipment.

The purpose of the invention is to increase the fire efficiency of the tusk e) (the operation of the device and economical consumption of the plant foaming agent by increasing the range of supply of high foam while simultaneously increasing its multiplicity and preserving the structure.

FIG. 1 shows a fire extinguishing device, side view; on

FIG.

Fire extinguishing device with two jet accelerators, top view: FIG. 3 - fire extinguishing device with different variants (a ,,)) of mutual arrangement of generators.

The device consists of a fan 1 installed at the inlet of an ejection generator 2 of high-expansion foam comprising a frother solution dispenser with nozzles 3, a grid A mounted perpendicular to the direction of solution movement. The casing of the generator 2 has a narrowing diffuser part 5 and a nozzle 6. The jet accelerator 7 is installed in the transition zone diff (}) of the pattern 5 to the nozzle 6 and has a pipe 8 passing through an opening in the wall of the generator casing 2. 9 compact low-foam foam generator. The foaming solution enters the nozzle 3, jet accelerator

Telephones 7 and generator 9 from the common collector 10. Through pipes 11 and 12 and devices 13-15 for controlling the races: foaming stroke.

The device works as follows, e

From the distribution manifold 10, the frother solution enters simultaneously into three channels, namely: generator 9, where a compact-45 is formed into a low-expansion (C) foam array of low multiplicity, supplied at a certain output speed V, and a foam supply distance of 100 m and more; to the rfft power transducer of the pipeline 1 1, where the energy Q of the frother solution is converted into rotational movement of the fan 1, and the exit stream of the frother solution through the nozzles 3 is directed to the grid 4, where foam of foam multiplicity is formed (up to 500-1200), which, falling into the dis {) fusor, accelerates and enters the co-operation 6 at a speed V ,; ; comes by tru55

- Q

j

20, 25 - -JQ

35

40

-45 th Q 55

the conduit 8 to the accelerator 7, which forms a dispersed stream of low expansion foam with a jet opening angle of 10-30 flowing out of the accelerator with speed V.

In this case, the speeds are distributed in a skinny manner V, V, V,. The foam A of the increased multiplicity, having a minimum speed, is ejected by the dispersed stream E of the low expansion foam and is accelerated to the speed Vj, further ejected and picked up by the stream C having the speed V ,. Ejection and pickup occur in the zone B of the optimum jet mixing speed, not moving between the cut of the generator body of the 9 compact jet and the maximum trajectory point of the dispersed jet E.

It is possible to arrange the jet accelerator 7 in the transition zone from the diffuser 5 to the nozzle 6, since in this case the jet accelerator housing creates an additional narrowing of the diffuser opening. This and plus the ejection created by the dispersed jet E, and the possibility of adjusting the position of the axis of the generator 9 relative to the axis of the device 2 in the range of angles allows you to select the optimal flow of the stream C (i.e., perform smooth unaccented mixing of foams of different dispersion and multiplicity) taking into account the effect of ekdii at the maximum distance.

The maximum relative range is provided when the axis of the generator 9 is located at an angle from +6 to -18 ° relative to the axis of the generator 2.

The increase in the relative range (LQ) of the foam of increased multiplicity depends on the multiplicity of foam produced by the ejection generator 2. This pattern was observed for foams with the multiplicity of 40-1200.

In order to give the proposed device a wider scope for providing the multiplicity of fire extinguishing foam coming out of such a device, it can be equipped with devices 13-15 that regulate the flow rate of the frother on each line. This solution allows to increase the fire-extinguishing efficiency of the device and the economical consumption of the foaming agent solution by increasing the range and feed rate of the high-expansion foam while simultaneously increasing its multiplicity and preserving the structure, which is confirmed by the test results.

Claims (4)

1. A fire extinguishing device comprising a housing having a tapering part and at least one high-ejection foam ejection generator installed therein, including a frother solution sprayer, made in the form of a nozzle, and a grid installed perpendicular to the direction of movement of the foaming solution and a jet accelerator located coaxially with the nozzle of an atomizer of an ejection generator solution, characterized in that, in order to increase the efficiency of the device, it has a low expansion foam generator, installed under an ejection generator, and a distribution manifold with pipelines the holes are made in the casing, and the collector is connected to one of the pipelines with a low-expansion foam generator, and the others through the holes in the casing are connected to the frother solution sprayer and accelerator, respectively. 2. A device according to Claim 1, characterized in that, in order to enhance the effect of accelerating the jet of the foaming agent, the accelerator is installed in a narrowing part of the casing. 3. A device according to Claim 1, characterized in that it has additional jet accelerators, of which the nozzle of the foaming agent solution is installed coaxially with the nozzle. 4. A device according to Claim 1, characterized in that it has means for changing the angle of inclination of the low expansion foam generator. Phi2.1 , 2 i) /; ); JbV: 0 l "v V,