High-pressure direct injection type double-layer fine mist spray head

Abstract

The invention discloses a high-pressure direct injection type double-layer fine mist spray head. The spray head comprises a spray head cap (1), an atomization plate (2), a whirl plate (3), a guide post (5), a shunt plate (6), a spray head seat (8), a filter cylinder (10), a clamping ring (11) and a filter screen (12). High-pressure water current rotates regularly at a high speed along a circular whirl cavity formed by the whirl plate and the conical part of the shunt plate under the guide of a flow guide slot of the whirl plate so that the water mist sprayed from an outer nozzle has the characteristics of high speed, uniform distribution and the like; a double-layer fire extinguishing nozzle greatly increases the atomization angle of the spray head and improves the atomization range, and the water current still has high axial motion quantity so that the mist drops can penetrate the fire field space to realize deep fire extinguishment; and circular water films are unstably broken more easily under the action of the air through the circular outer nozzle so that good atomization effect is achieved. The spray head also can be applied in the fields of agricultural pesticide spraying, food processing, medicinal treatment and the like besides the fire fighting field.

Description

technical field [0001] The invention relates to a sprinkler head, in particular to a sprinkler head used in a fine water mist fire extinguishing system. Background technique [0002] Since the halon fire extinguishing agent withdrew from the field of fire protection due to its damaging effect on the ozone layer, the water mist fire extinguishing system has been paid attention to as a substitute for halon. The water mist fire extinguishing system has the dual advantages of gas fire extinguishing and water fire extinguishing, and at the same time reduces their shortcomings. It has a series of advantages such as low water consumption, fast fire extinguishing speed, and low engineering cost. It is recognized as the best substitute product of halon fire extinguishing agent, and has become one of the very important fire extinguishing systems in the field of fire protection. [0003] In the commonly used water mist fire extinguishing system at present, two kinds of fine water mist...

AI Technical Summary

Problems solved by technology

This type of nozzle has the advantage of large fire extinguishing coverage, but it also has the disadvantages of small flow rate and short spray distance; the other type of nozzle has only one nozzle, that is, it directly uses high-pressure water to spray out after the deflector column is rotated and accelerated to form water mist. The water mist formed by this nozzle has a large axial momentum and strong penetrating power, which can realize deep fire extinguishing, but its disadvantages are also obvious, that is, the coverage is very limited, and the effect is not ideal when fighting a large area of ​​fire.

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