Direct-through double-helix convergent type water pressure atomizing spray nozzle

Abstract

The invention discloses a direct-through double-helix convergent type water pressure atomizing spray nozzle. The direct-through double-helix convergent type water pressure atomizing spray nozzle comprises a spray nozzle body (1), wherein an inner spiral pushing rod (3) and an outer spiral pushing rod (2) are arranged in the spray nozzle body (1); a spray nozzle ejector rod (10) is further connected with a water inlet of the spray nozzle body (1); the inner spiral pushing rod (3) and the outer spiral pushing rod (2) are coaxially and fixedly connected with each other; a spiral groove in the outer surface of the inner spiral pushing rod (3) is matched with a spiral groove in the inner surface of the outer spiral pushing rod (2) to form a complete round-mouth spiral convergent water path (4); the outer surface of the outer spiral pushing rod (2) is in seamless fitting with the inner surface of the spray nozzle body (1); the bottom surface of the cone part of the outer spiral pushing rod (2) and the bottom surface of the cone part of the inner surface of the spray nozzle body (1) are on the same plane. The direct-through double-helix convergent type water pressure atomizing spray nozzle disclosed by the invention has the advantages of being small in size, light in weight, simple in structure and simple to install. Water at the outlet flows quickly and has very high tangential speed, so that an atomizing range and atomizing capacity are easy to increase. The direct-through double-helix convergent type water pressure atomizing spray nozzle disclosed by the invention can be applicable to a fire extinguishing apparatus carried in front of a water-pressure self-servo snakelike fire-extinguishing and disaster-relief robot.

Description

technical field [0001] The invention relates to the technical field of hydraulic nozzles, in particular to a structure of a medium-low pressure hydraulic nozzle. Background technique [0002] With the rapid development of modern science and technology, people are paying more and more attention to the earth's environment and natural resources on which we live while satisfying the basic needs of life. Halon fire extinguishing agent has been widely used in the last century due to its excellent properties such as no residue and residue during fire extinguishing, fast fire extinguishing speed, chemical stability and long-term storage. However, it belongs to the halon series fire extinguishing agent, which will greatly destroy the ozone layer in the atmosphere, cause various problems such as the greenhouse effect, and seriously endanger human health. The 1987 United Nations Environmental Protection Convention "Montreal Protocol on Substances that Deplete the Ozone Layer" requires...

AI Technical Summary

Problems solved by technology

But the disadvantage of this structure is that the disturbance of the water flow is only done by a sudden change, and the tangential velocity of the water outlet is not enough, so there are many limitations on the atomization performance

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