Outer mixing double fluid fan-shaped spray nozzle

Abstract

The invention discloses an outer mixing double fluid fan-shaped spray nozzle which comprises a nozzle body, a nozzle, a supporting pipe, a seal cover and a central pipe, wherein a through hole is formed in the central position of the seal cover; one end of the central pipe is inserted into the supporting pipe through the through hole and the inner part of the nozzle is hermetically connected to the seal cover; and an annular cavity where water circulates is formed between the outer side wall of the central pipe and the inner side walls of the supporting pipe and the nozzle. According to the nozzle structure, a biological pesticide and water are sprayed out through the central pipe and the annular cavity, separately, solid particles such as biological living bodies and auxiliary agents in apesticide are prevented from being in contact with and colliding with the nozzle under protection of water, the erosive wear of the nozzle is reduced, and the damage of microbial cells at the nozzleis also reduced, so that a pest control purpose is achieved.

Description

technical field [0001] The invention relates to the technical field of plant protection equipment, and more specifically relates to an external mixing two-fluid fan-shaped spray head. Background technique [0002] At present, due to the advantages of environmental friendliness, no chemical residues, and sustainable control, biopesticides have important development potential in the control of agricultural and forestry diseases and insect pests, and have gradually become a research hotspot and an important direction. [0003] However, the backward application technology and low utilization rate of biopesticides have become the key problems restricting their development. Different from chemical pesticides, biological pesticides are active systems. In order to maintain the efficacy, not only must there be strict requirements on the atomization performance of the chemical solution during application, but also the number and activity of bacteria in the pesticide must be guaranteed...

AI Technical Summary

Problems solved by technology

The reason is that when the biopesticide flows through the nozzle and is atomized, first, the living cells in the pesticide collide and impact with the inner wall of the nozzle, and second, the liquid stress such as liquid tensile stress and shear stress generated during atomization, both of which will intensify Damage to living cells within the pesticide, resulting in reduced activity of the biopesticide

[0005] Existing mist nozzles include conical mist nozzles and fan-shaped mist nozzles. Compared with conical mist nozzles, the ball head structure of fan-shaped mist nozzles has greater damage to the activity of biological agents, but fan-shaped mist nozzles have a wider range of spraying, and because of their unique fog Type distribution, which has an irreplaceable role in the combined spraying of multiple nozzles on large sprayers

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