RU2458718C1 - Device for fire isolation - Google Patents

Abstract

FIELD: fire-fighting means.

SUBSTANCE: invention relates to fire-fighting equipment, in particular to devices for fire isolation with sand and soil, and extinguishing with dry chemical powder. The device for fire isolation comprises a compressor driven by an internal combustion engine, a hopper for sand, a jet blower. The jet blower is connected to the hopper through a valve to regulate the flow of sand and to the compressor through the valve for controlling the air supply, as well as with a hose for feeding sand-air mixture in the barrel. Hopper feed opening is closed on both sides with grids mounted at an angle of 35-45 degrees to the plane of the opening. In the mixing chamber of the jet blower a feeder tube is installed, which upper end is connected to the flap and the bottom is closed with a stopper. In the feeder tube there is a radial hole located coaxially with the holes in the nozzle of the compressed air supply to the blower and the confuser.

EFFECT: invention enables to reduce the time required to prepare the device for work, to use ground and sand for fire isolation.

1 cl, 2 dwg

Description

The invention relates to fire fighting equipment, in particular to devices for localizing a fire with sand and soil and for extinguishing a fire with extinguishing powder.

A device for extinguishing a fire is known, having a housing equipped with a receiving hopper filled with extinguishing powder, a chamber for mixing the extinguishing powder with compressed gas, connected to a source of compressed gas through a pipe at the inlet of which a non-return valve is mounted, and at the outlet of which there is a discharge pipe powder gas suspension, and a screw for feeding powder into the mixing chamber located inside the housing and connected to the electric drive, while there is a gap between the end of the screw and the check valve (see patent RU No. 21 07523, CL A62C 35/00, publ. 03/27/1998).

A disadvantage of the known device is the need to perform adjustment operations during a fire - to set the gap between the end face of the screw and the check valve. The size of the gap is selected depending on the properties of the extinguishing powder (its composition, particle size, bulk density), as well as on the basis of the required specific consumption of powder, which, in turn, is calculated depending on the type of fire hazardous facility.

The objective of the invention is to remedy these disadvantages. The technical result is to reduce the time to prepare the installation for localization or extinguishing a fire, to ensure continuous operation of the installation, to use for the localization of the fire a common material - sand. The proposed installation is designed to localize fires in areas with limited water resources, in facilities where the use of water and foam is prohibited, to localize and extinguish class B fires - fires of combustible liquids and melting solids and class (E) fires - fires associated with burning electrical installations.

The problem is solved, and the technical result is achieved by the fact that the installation contains a compressor driven by an internal combustion engine, a jet supercharger, a sand hopper, the feed opening of which is closed on both sides by grids installed at an angle α to the plane of the feed opening of 35-45 degrees . The angle of inclination of the grids of 35-45 degrees ensures the screening of sand at the time of its loading into the hopper, while large grains, the sizes of which are larger than the sizes of the mesh cells, roll along an inclined plane without covering the holes in the grids. The jet blower consists of a feeder tube, nozzle, mixing chamber, and conical confuser. The feeder tube connects the hopper to the mixing chamber. The bottom hole of the feeder tube is plugged with a plug, and at the nozzle level there is a through hole directed towards the confuser. A flap is installed between the feeder and the feed hopper, designed to control the flow of sand into the mixing chamber. The nozzle for supplying compressed air to the supercharger is connected to a valve, by means of which the supply of compressed air is regulated.

In the drawing (figure 1) presents the proposed installation.

The installation has a compressor driven by an internal combustion engine 1, the exhaust manifold of the compressor is connected by a sleeve 2 to a jet supercharger 3, a sand hopper 4, the feed opening of which is closed by nets 5. The jet supercharger by a sleeve 6 is connected to the barrel 7. The units and assemblies of the installation are fixed to the base 8.

Figure 2 presents a sectional drawing of a jet pump installation.

The jet supercharger is mounted on the bottom of the hopper with 4 bolts 12 and connected to the hopper by a nozzle 14. On the cover 10 of the housing of the mixing chamber 16 there is a valve for regulating the air supply 9, connected to the nozzle for supplying compressed air to the supercharger 11. The tube of the feeder 20 is fixed in the housing of the mixing chamber by a fitting 15, the bottom hole of the tube is closed by a plug 19. An adjustment flap 13 is installed between the feeder tube and the hopper 13. The housing of the mixing chamber is connected to the confuser 17, at the end of which there is a fitting 18 for attaching the sleeve 6.

Installation works as follows.

Sand is loaded into the hopper 4, which is sifted through the net 5. The sand from the hopper under its own weight enters through the damper 13, which is used to control the volume of sand, and the feeder tube 20 into the mixing chamber 16 of the jet blower 3. Sand through a radial hole in the feeder tube picked up by a stream of compressed air coming from the compressor 1 through a nozzle for supplying compressed air to the supercharger 11. The volume of air entering the jet supercharger 3 is regulated by a valve 9. The sand-air mixture is supplied I am through the confuser 17 and sleeve 6 into the barrel 7, which is sent to the combustion zone.

Claims (1)

Installation for localizing a fire, comprising a compressor driven by an internal combustion engine, a sand hopper, a jet blower connected to the hopper through a damper for regulating the supply of sand and with a compressor through a valve for regulating the air supply, as well as with a sleeve for supplying the sand-air mixture in the barrel, characterized in that the feed opening of the hopper is closed on both sides by nets installed at an angle of 35-45 ° to the plane of the hole, and a feed tube is installed in the mixing chamber of the jet supercharger Spruce, the upper end of which is connected to the damper, and the lower end is closed by a stopper, there is a radial hole in the feeder tube located coaxially with the holes in the nozzle for supplying compressed air to the blower and confuser.

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