Double-aerosol-extinguishant spraying device

Abstract

The invention discloses a double-aerosol-extinguishant spraying device which comprises a high-shooting-speed fan or an aero-gas turbine, an aerosol extinguishant spraying tube, a water supply ring, a foamite supply ring, a superfine dry powder extinguishing agent spraying gun, a superfine water mist spraying nozzle, a foamite spraying nozzle, a first solenoid valve, a second solenoid valve and a third solenoid valve. The double-aerosol-extinguishant spraying device achieves mass flow and high-shooting-speed spraying. Double-aerosol-extinguishant jet flow sprayed by the double-aerosol-extinguishant spraying device is sprayed into an internal space of a building on fire, aerosol extinguishants are rapidly dispersed to generate a 'totally flooding' state and enter the interior of flames under the action of entrainment airflow of the flames, and consequently a fire in the building can be rapidly put out, and the flames are prevented from reburning.

Description

Technical field [0001] The invention belongs to the technical field of fire fighting, and particularly relates to a dual aerosol fire extinguishing agent spraying device. Background technique [0002] From the beginning of the last century to the end of the 1920s, water jet fire trucks, foam fire trucks, and dry powder fire trucks appeared in the world. These highly maneuverable fire trucks played a role in fighting violent fires such as urban fires and petrochemical plant fires. It plays an important role and is the main fire fighting equipment in the current fire fighting. But the actual fire fighting also revealed its technical flaws. These defects are: the water jet fire truck forms a line of water jets from the outlet of the jet gun (cannon) to the fire source, and extinguishes the fire by impacting and cooling the fire source by the water jet. This "point-to-point" method of spraying fire extinguishing agent is " One-dimensional spray mode of fire extinguishing agent", wh...

AI Technical Summary

Problems solved by technology

These defectives are: water jet fire engine forms a connection line of water jet from the outlet of spray gun (cannon) to fire source, extinguishes the fire with the mode of water jet impact cooling fire source, and this mode of spraying fire extinguishing agent with " point to point " is " One-dimensional injection pattern of fire extinguishing agent", which improves the ability to suppress Class A fires

Although gaseous fire extinguishing agents such as carbon dioxide and heptafluoropropane have "full flooding" fire extinguishing performance, they cannot achieve large-flow injection

However, the disadvantage of the solid-based aerosol fire extinguishing agent is that when its concentration drops, the extinguished flame is easy to re-ignite under the action of residual heat.

201210344566.7 patented technology solves the method of spraying double fire extinguishing agents in the same fire extinguishing agent spray gun at the same time, which is a big step forward in overcoming the problem of easy flame re-ignition, but only one of the double fire extinguishing agents sprayed out can It produces "full submersion" fire extinguishing effect, and there is the problem that the flow rate of the gun (cannon) spraying fire extinguishing agent is small and the injection power is insufficient; the patented technology of 200910035880.5 solves the method of generating air foam fire extinguishing agent in the high-speed airflow of high-power injection, but Cannot generate "total flood" type jets of extinguishing agent that fill the interior of the building

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