SU1205918A1 - Method of fludization of fire-extinguishing powder - Google Patents

Description

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1205918

FIELD OF THE INVENTION The invention relates to fire fighting equipment, in particular, to a method for preparing a fire extinguishing powder before putting the fire extinguisher into action.

The purpose of the invention is to increase the extinguishing ability of the powder by intensifying its loosening.

The drawing shows a fire extinguisher filled with fire extinguishing powder with granules of microencapsulated freon distributed in the bulk of the powder.

The fluidization of the fire extinguishing powder 1 according to the proposed method takes place in the cylinder 2 of a powder fire extinguisher containing a siphon 3 to eject the powder onto. the source of fire, the source 4 of compressed gas and the tube of the agitator 5. In the powder, granulated solid 6 is introduced and evenly distributed over its volume, the specific mass of the granules exceeds the specific mass of the powder granules. As such substances use microencapsulated freon.

The method is carried out as follows.

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During the charging process, the fire extinguisher balloon 2 is filled with an extinguishing powder, which is injected and evenly distributed over the entire volume occupied by the powder mass, no less than five volume percent of microencapsulated freon, which is a granular solid with granules. spherical shape. After powder refueling, a fire extinguisher can be placed on the co-editor A. Kozoriz

Compiled by A. Popov Tehred M. Nad

Order 8584/7 Circulation SH

VNIIPI State Committee. USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

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tires and mechanisms subject to vibrations and shock loads.

The large weight of the granules at relatively small sizes, as well as the low coefficient of friction, give the microencapsulated freon a high mobility and penetration ability, which allows the granules, especially when external vibrations are present, to easily migrate in the mass of powder and mechanically loosen cracked clumps. When a powder fire extinguisher is carried out, compressed gas from source 4 enters the ratchet 5 and then, the outlet from the orifice in the form of a jet, acts on the array of powder and disperses it. The granules of microencapsulated freon distributed over the volume of powder, having a very low friction coefficient and high mobility, intensively move in the powder and bombard packed clumps, destroying them. This increases the fluidity of the fire-fighting composition due to the presence in it of mobile granules of freon and a pseudo-pulverization of the mass of fire extinguishing powder occurs. The fluff powder, due to the gas pressure generated in the cylinder 2, expires from the fire extinguisher through a siphon 3 and is fed to the fire site. The granules of micro-encapsulated freon, having performed the functions of an intensifier of the fluidization process, come out together with the fire extinguishing powder from cylinder 2 and, falling on the burning materials, provide an additional fire-fighting effect - they inhibit the open flame, breakage of the exothermic oxidative chain

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Claims (2)

1. METHOD OF Pseudo-LIFE OF THE FIRE EXTINGUISHING POWDER, which consists in flushing the powder with compressed gas and its mechanical loosening, characterized in that, in order to increase the fire extinguishing ability of the powder by intensifying its loosening, granulated solid substance is introduced into the powder and uniformly distributed over its volume, specific gravity granules of which exceeds the specific gravity of powder particles, and loosening is carried out by moving solid granules in the bulk of the powder. 2. The method of pop. 1, with the fact that as a granular solid, microencapsulated freon is used. 120591B