Multifunctional compressed air foam fire extinguishing device

Abstract

The present invention discloses a multifunctional compressed air foam fire-extinguishing device which comprises a fire-extinguishing spray gun, an air compressor and a high-pressure water pump, wherein: the fire-extinguishing spray gun comprises a mixing chamber, a foaming chamber and a nozzle which are connected in sequence; the mixing chamber is communicated with the foaming chamber and the high-pressure water pump, and a check valve disposed on the mixing chamber wall is communicated with the air compressor via a valve piping; a cylindrical cavity filter screen is arranged inside the foaming chamber; and the air compressor is also connected a adjustable foam adding valve piping in parallel. According to the present invention, the fire-extinguishing spray gun is integratedly and compactly designed, and matches with a pneumatic foam proportioning mixing device, and the high-pressure water pump is connected with the fire-extinguishing spray gun; so without any decompression, injection pressure of extinguishing media is high; and through a proportional pressure regulating valve, a throttle and the check valve of the mixing chamber, the proportions of each medium can be adjusted. The fire-extinguishing device of the present invention is easy to move, and is suitable for a variety of fire extinguishing media; and meets the requirements of different fire scenes.

Description

technical field [0001] The invention belongs to the field of mechanical design and manufacture, in particular to the field of design and manufacture of fire-fighting mechanical equipment, in particular to a multifunctional compressed air foam fire extinguishing device. Background technique [0002] Existing fire extinguishing uses a variety of fire extinguishing media according to different needs, such as water, water-air, water-foam, water-foam-air and other mixed media; use different media to match and use different fire-fighting equipment. [0003] Compressed air foam fire extinguishing usually uses a pressure balance device to match the pressure of the compressed air and the mixed liquid, so that the compressed air enters the mixed liquid to form a two-phase flow. The structure of the pressure balance device has a high degree of automation, but the structure is complex, expensive, and difficult to maintain; Due to the large change of the system control pressure, the erro...

AI Technical Summary

Problems solved by technology

Ordinary fire water guns are used to spray low-pressure water, which has a single jet and consumes a lot of water; high-pressure water guns are used to spray high-pressure water or fine water mist, and their jets are also single and consume a lot of water; foam fire extinguishers use Venturi or negative pressure principle, so that The foam liquid is mixed with air to produce foam, the expansion ratio is low, and the fire extinguishing effect is poor

Existing ordinary fire water guns, high-pressure water guns and foam fire guns cannot be conveniently converted to each other, and often cannot meet the conversion needs of multiple fire extinguishing methods in fire extinguishing scenes with changing conditions

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