SU866230A2 - Arrangement for extinguishing underground fires - Google Patents

Description

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

According to the main auth. No. 589432, a device for extinguishing underground fires is known, which includes a fan, a mixing chamber, a housing and a bunker. To ensure uniform powder supply from the hopper to the mixing chamber, the lower part of the bunker is made up of a cylindrical part (throat) of the mixing chamber of the annular collector, connected by channels to the confuser of the chamber, with the mixing chamber installed in the housing with a gap in the lower part of l.

A disadvantage of the known device is its relatively low productivity.

The purpose of the invention is to increase its productivity by increasing the area of contact of the air jet p with a cylindrical part of the mixing chamber having an annular perforation and the liquefied blemish entering the mixing chamber.

The goal is achieved by the fact that the cylindrical part of the mixing chamber is corrugated, with the corrugations located along the axis of the chamber.

FIG. 1 shows a device for extinguishing underground fires, a longitudinal section; in fig. 2 - the same, front view, without vent nl ora.

The device includes a fan 1, a mixing chamber 2, a housing 3 and a hopper 4.

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The mixing chamber 2 consists of a confuser 5, a cylindrical part 6, with an annular perforation 7, and a diffuser 8 sealed in a shell 9. The chamber is installed in the housing 3

20 so that a gap 10 is formed between the shell and the casing in the lower part.

Claims (1)

In the lower part, the bunker 4 is designed as an annular collector I1 enclosing the cylindrical part 6 of the mixing chamber 2 and connected to the confuser 5 by channels 12. The cylindrical part of the mixing chamber is made corrugated, and the corrugations 13 are located along the axis of the chamber. The device works as follows. The air stream from the fan 1 is divided into two streams; one enters the mixing chamber 2 and the other enters the gap 10. Part of the air flow entering the chamber is directed through channels 12 to the annular collector 11 of the hopper 4 where the fire-extinguishing powder is liquefied continuously entering the collector from the bunker. At the same time, a pressure is created in the collector, which exceeds the pressure in the mixing chamber 2, which facilitates the flow of powder into the mixing chamber through perforations 7 into the cylindrical part 6. powder aerosol spray, which due to the pressure of the fan n is given to the fire. The air jet passing through the gap 10 between the shell 9 of the mixer of this chamber and the body of the bunker 4 creates an air cushion playing the role of a lubricant between the powder jet and the surface of the mining industry. Increasing the area of contact of the air flow with the perforated cylindrical part of the mixing chamber helps to increase the consumption of powder, t; e. improves the performance of the device, which increases the efficiency of the fire extinguishing the proposed device. The invention The device for extinguishing underground fires auth.St. No. 589432, characterized in that, in order to improve its performance by increasing the contact area of the air jet with the annular perforation of the cylindrical part of the mixing chamber and the quantity of liquefied powder entering the mixing chamber, the cylindrical part of the mixing chamber is corrugated, and the corrugations are arranged along the axis cameras. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 589432, cl. E 21 F 5/00, 1976 (prototype). ; z 1Z W