RU26007U1 - UNIVERSAL COMBINED FOAM FOAM GENERATOR - Google Patents

Abstract

1. A universal foam generator of combined foam containing a foam generator with a nozzle for a spray of a foaming solution, a nozzle with an annular collector of spray nozzles for supplying inert gas, characterized in that for the formation of a foam damper (plug) it is equipped with an additional gas collector for forming a plug in the upper part of the dome through installed spray nozzles nozzles, e.g. lightweight aeronautical helium foam plugs. 2. The universal foam foam generator according to claim 1, characterized in that the spray nozzles of the annular compressed nitrogen gas supply manifold and an additionally installed annular collector with outlet nozzles of the helium foam filler are combined by an annular chamber for mixing filler reagents (nitrogen and helium) with a common exit by plane sprayers into the zone mixing with a foaming solution.

Description

Universal foam generator combined foam.

A useful model of a universal foam generator relates to fire fighting equipment and can be used to extinguish high-temperature combustion centers in hard-to-reach places.

A known installation of a combined foam supply containing a foam generator and an air-foam barrel located beneath it with a flat jet nozzle. In this case, the resulting foam of medium multiplicity falls on a flat stream of low-level foam, through which it is transported to the fire (ed. Certificate of the USSR No. 1085601, class A 62 C 31/12, 1983).

A known method of extinguishing a fire and a device for its implementation, which consists in preparing an inert foam of different multiplicity and feeding it to the fire in the form of a layer of one magnification on a layer of another multiplicity, the device for its implementation contains a foam generator with a nozzle for spraying a foaming solution, a nozzle for supplying an inert gas with spray nozzles, and the foam barrel located under the foam generator contains an ejector with a store of high-energy pyrotechnic gas generators fixed at its end iruyuschego action (specification of a patent RF № 2102093, A62C 2/00, 31 / 12.1998).

A disadvantage of the known methods and devices for their implementation is that the formed puff foam does not have the properties of filling volumetric voids, for example, to generate foam for extinguishing fires in large domes and collapses of mine workings, due to the constant syneresis of foam accumulation.

multiplicity and its natural penetration s inaccessible high-altitude places when filling, for example, domes and emergency caving in mine workings.

This goal is achieved by the fact that in the combined universal fire extinguishing foam generator, including the preparation of inert foam of different multiplicity and its supply to the fire in the form of a layer of one magnitude on a layer of another multiplicity, according to a utility model, the foam layer of the insulating barrier is obtained due to nitrogen inert foam, and the hard-to-reach collapse dome layer is filled directly with aeronautical foam with a reduced filler density, for example, helium.

In addition, in a combined foam generator containing a foam generator with a nozzle for spraying a foaming solution, a nozzle for supplying an inert gas with spray nozzles, the spray nozzles of the annular manifold for supplying compressed gaseous nitrogen and an additionally installed ring collector with outlet nozzles for the helium foam filler are combined with an annular mixing chamber with foam .

The proposed set of distinctive features has a new property, namely, in the formation of a foam layer of aeronautical foam with a reduced density, the effect of volumetric filling of voids with light suspended foam in the upper layers of collapses, for example, in emergency mine workings of mines or in surface objects, is achieved.

The drawing shows a schematic diagram of a variant of a universal foam generator of combined foam, a longitudinal section; the photographs show a prototype foam generator (Fig. 2) and its industrial tests at the RosNIIGD training ground.

a foam cross 8 is fixed, closed to a clip 9 with a latch 10, on which the cone nozzles 11 are made with the possibility of reciprocating movement, made in the form of a truncated cone with ejection windows, a smaller base fixed to the end of the atomizer 4, and a large one on the flange 12, made integral with gas manifolds for nitrogen and helium.

The foam generator 1 is additionally equipped with a gas collector 13 with a helium filler with nozzles 14 and a nozzle 15 for supplying helium gas with a feed control valve 16. Spray nozzles of nitrogen 6 and helium 14 are combined by an annular chamber 17 for mixing inert filler reagents (nitrogen and helium) with a common output flat-jet sprayers 18 into the mixing zone with a foaming solution from a sprayer4. Generation and pressure control

foam transportation is provided through the inspection window 19 and the pressure gauge 20.

Universal foam combined foam works as follows.

To form a complex foam when filling hard-to-reach spots and displacing fire gases, for example, from collapse domes in emergency mine workings, at the initial stage, helium gas with a density of 0.178 g / l is supplied through the nozzle 15 to the annular collector 13, which through the nozzles 14 and the general sprayer 18 enters the foam generator 1, where it is mixed with the foam-forming solution, which is supplied through the sprayer 4 with the final formation on the foam generator grid 2 of aeronautical foam with a helium filler eat. In this case, it is possible to connect a ventilation sleeve to the foam generator for targeted orientation of the foam flow. The resulting light aeronautical foam rushes into the upper part of the dome with a foamy stream, with its mass displacing the fire gases and filling them. After creating an aeronautical plug to create an insulating curtain, nitrogen gas is supplied through the nozzle

7 on the annular collector 5 to obtain nitrogen foam with a density of 1.25 g / l with a higher productivity from underground nitrogen gasifiers. At the same time, helium filler can also be supplied depending on the volume of collapsed space.When creating the upper aeronautical plug in order to create lighter foam for transporting it to the top of the dome, the flange 12 is progressively closed to the foam generator 1, as well as the ejection windows of the cone nozzle 11.

When forming the foam curtain of the emergency section, the cone nozzles 11 open, and its ejection windows open to create greater discharge performance

In order to suppress flame combustion in the dome of the mine along with the gas phase, a phlegmatizer is supplied to the atomizer, namely, the pairs of Freon 114B2.

The proposed technical solution for a universal combined foam generator allows for more efficient localization and extinguishing of high-temperature combustion centers, displacement of fire and harmful gases from hard-to-reach places, increase the safety of mine rescue operations during the elimination of complex underground fires, as well as surface rooms.

Patent specialist

R.V. Dikova

Claims (2)

1. A universal foam generator of combined foam containing a foam generator with a nozzle for a spray of a foaming solution, a nozzle with an annular collector of spray nozzles for supplying inert gas, characterized in that for forming a foam damper (plug) it is equipped with an additional gas collector for forming a plug in the upper part of the dome by means of installed spray nozzles nozzles, for example a lightweight aeronautical helium foam plug. 2. The universal foam generator of combination foam according to claim 1, characterized in that the spray nozzles of the annular compressed gas nitrogen supply manifold and an additionally installed annular collector with outlet nozzles of the helium foam filler are combined by an annular chamber for mixing the filler reagents (nitrogen and helium) with a common exit by planar spray guns into the mixing zone with the foaming solution.