RU37769U1 - DEVICE FOR GENERATION AND PRESSURE TRANSPORTATION OF FOAM - Google Patents

Description

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A device for generating and pressure transporting foam.

The utility model relates to the mining industry and can be used to extinguish underground fires.

A foam generator is known for extinguishing fires in mines, consisting of a housing, a mesh bag, a spray nozzle, a sealing device, a guiding device and supply lines, while the foam generator is equipped with an alarm for leaving the well (ed. Certificate of the USSR No. 504878, class E 21 F 5 / 00.1974).

..1- A disadvantage of the known device for extinguishing fires is low productivity, as a result of which it is used for relatively small amounts of isolated space and strong lateral rocks containing the well.

The closest technical solution to this model is a device for extinguishing fires with gas-mechanical foam, consisting of a body including a diffuser, with grids, a mixing chamber and a confuser of a foam generator, a gas manifold, fittings for connecting foam supply lines and an inert gas. The device is equipped with jashozi. (Auth. Certificate. USSR No. 576421, class E 21 F 5/02, 1974)

The known device for extinguishing fires is designed to be installed in the body of an insulating structure and is unacceptable for extinguishing fires through wells drilled to the fire from existing workings. In addition, this device does not allow you to adjust the amount of foam supplied and excludes the flow of foamed inert suspension with the addition of phlegmatizing composition.

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The aim of the present invention is to improve the efficiency of extinguishing fires by regulating over a wide range the amount of foam and foamed suspension supplied to the source of the fire along the foam ducts of 100 and 150 mm.

This goal is achieved by the fact that universal devices, namely its body, is equipped with a main foam generating and second foam generator of foamed suspension, connected to a common mixing chamber, and the outlet housing of the confuser is equipped with an additional adapter for connecting to foam pipes with a nominal passage of 100 and 150 mm, and a gas supply manifold the inert gas of the mixing chamber is equipped with flow valves on both sides to control the multiplicity of the foam or foamed suspension at the outlet of the mixing chamber and, for example, its occurrence in converger for additional mixing and further to penoprovod foam (compositions) and diverting manifold outlet slot into the mixing chamber from the back side thereof provided with connections for connection of the powder spray flow regulator, which is used as, for example, bentonite.

The proposed set of distinctive features allows you to provide:

- the possibility of universal transportation of foams and foamed inert suspensions through mine pipelines 100 and 150 mm

-regulate the flow of the composition (foam and foamed suspension) by means of valves installed on the supply hoses over a wide range;

-regulate the output of the inert filler through the viewing window on the confuser and on the pressure gauge;

-the ability to connect to the flanges of a universal device;

The device consists of a housing included in the mixing chamber 1, a diffuser 2 with a viewing window 3 and a pressure gauge 4 working pressure. On the outside of the mixing chamber 1, a gas collector 5 and a stabilizer 6 directed opposite to the flow of the composition are installed, oppositely directed (not shown on the full-scale sample) with flow valves 7, respectively, for connecting inert gas sprays (not shown) and stabilizing additives. Two nozzles 9 and 10 having diameters of 100 and 150 mm are mounted in the mixing chamber 1 for connecting foam generators of inert foam and inert foam suspension. The device is connected to pressure head pipelines with a nominal passage of 100 and 150 mm by means of flanges 13 14 to the adapter 15. The gas stream for dispersing the foam is provided with a sleeve 16 with a fitting 17 for connecting the main pipeline from the liquid nitrogen gasifier, similarly, on the other side of the mixing chamber 1 is provided the input through the feed valve of the main pipeline stabilizer or filler in the form of bentonite, clay, fly ash, flotation waste.

A device for generating and pressure transporting foam works as follows.

To carry out fire extinguishing operations, this device is connected to a foam conduit with a conditional passage of 100 mm, i, using a flange 11 to a connecting bend or directly to the well casing. According to the operational mode, two foam generators with a nominal passage of 100 and 150 mm are included in the operation. At the same time, two collectors are included in the work (general case) for supplying an inert gas and stabilizing additives and then produced through the viewing window 3

task for the operating mode of feeding through inert valves 7

including foam generators connected to the flanges 11, 12, when generating foam, four flows enter the mixing chamber 1, two inert gas foam according to the condition and the foam flow stabilizer, which are mixed in the specified proportions during the oncoming and cross flow depending on the composition of the atmosphere of the fire section from calculation of the exclusion of the danger of explosion. The opposite direction of movement of the flows of inert gas foam and stabilizing additives provides better mixing of them increases the fire-extinguishing ability and the resistance of the foam improves the foam formation mode. Tyentrol for the quality of foaming and working pressure is carried out respectively through the viewing window 3 and on the pressure gauge 4.

As the worked-out space and collapsed rocks are filled, which are recorded by the pressure increase on the manometer, one of the foam generators is turned off and the flow of foam (foamed suspension) is reduced.

The use of a universal device for the generation and pressure transportation of foam can significantly increase the efficiency and safety of mine rescue and preventive maintenance during the elimination of fires in mines.

Authors / C / V.V. Myachin

S.A. Sharov A.E. Chuprikov

Claims (1)

A device for generating and conveying foam, comprising a housing consisting of a confuser and a mixing chamber, an air-foam foam generator, a gas manifold and fittings for connecting foam supply lines and an inert gas, characterized in that the device is equipped with primary and secondary nozzles with flanges for connecting to foam generators, different in formation and productivity, communicated with the common mixing chamber, and the output of the confusers cn after the mixing chamber It is equipped with an additional adapter with flanges for connecting to foam pipes with a nominal bore of 100 and 150 mm, and the inert gas supply gas collectors into the mixing chamber located on both sides of the unit are equipped with flow valves for regulating the multiplicity of foam or foamed suspension at the outlet of the mixing chamber to the confuser additional mixing of the composition and then into the foam pipe of the foamed suspension, and the outlet pipes of the collector at the outlet to the mixing chamber from its reverse side (from the inside) are provided nipples for connecting the corresponding interchangeable nozzles of the gas stream or flow stabilizer, which is used, for example, bentonite.