Fan-shaped air suction nozzle capable of automatically adjusting air suction speed

Abstract

The invention provides a fan-shaped air suction nozzle capable of automatically adjusting the air suction speed. The fan-shaped air suction nozzle capable of automatically adjusting the air suction speed comprises a nozzle body, a liquid channel, a pressure tank and an air inlet channel, wherein the liquid channel communicated with a spray hole is arranged in the nozzle body; the inlet section of the liquid channel is communicated with the pressure tank; the air inlet channel penetrates through the pressure tank and then is communicated with the liquid channel; an air inlet hole plate is installed in the pressure tank through an elastic damping device; the air inlet hole plate is made to move at the intersection of the pressure tank and the air inlet channel through changes of the inlet pressure of the liquid channel; a plurality of through holes with the same size or different sizes are formed in the air inlet hole plate; and the air inlet hole plate moves in the pressure tank to change the air inflow in the liquid channel. According to the fan-shaped air suction nozzle capable of automatically adjusting the air suction speed provided by the invention, the air inlet speed can be automatically adjusted according to the pressure change of liquid flowing into the nozzle, so that sucked air more sufficiently collides with the liquid in a straight column section at the air inlet part of the liquid channel, and air and pressure liquid are better mixed.

Description

technical field [0001] The invention relates to the field of atomization and spraying of plant protection machinery, in particular to a fan-shaped air suction spray head which can automatically adjust the suction speed. Background technique [0002] Spray drift is an important factor affecting the quality of spraying operations and causing pesticide hazards. Air suction nozzles are an effective anti-drift technology. Based on the Venturi effect, the air-suction nozzle automatically inhales air and mixes with the liquid medicine to form a gas-liquid mixed flow, and the droplets formed by its atomization have a large particle size and are not easy to drift. According to the law of Kelvin-Helmholtz instability, instability occurs inside a fluid with a shear force velocity or at the interface of two different fluids with a velocity difference. full. However, the structure of the air intake channel of the existing air-suction nozzle is fixed, and the air intake speed cannot be ...

AI Technical Summary

Problems solved by technology

However, the structure of the air intake channel of the existing air-suction nozzle is fixed, and the air intake speed cannot be adjusted. When the spray pressure changes, the air intake speed will change, and a suitable air intake speed cannot be guaranteed.

At the same time, the angle between the centerline of the air inlet channel of the existing air suction nozzle and the centerline of the liquid channel is 90°, the mixing efficiency is limited when the air and the liquid collide, and the sufficient mixing of the liquid medicine and the air cannot be guaranteed, thus affecting the atomization effect

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