Pneumatic conveying variable spray head

Abstract

A pneumatic conveying variable spray head comprises a housing, a nozzle is arranged in the front end of the housing, the rear end of the nozzle is fixedly connected with a sliding plug, a pipe base is arranged in the sliding plug in a sleeved mode and connected with one end of a water inlet pipe, and the nozzle, an inner cavity of the sliding plug, an inner cavity of the pipe base and the water inlet pipe form a cavity used for liquid circulation. The spray nozzle is provided with multiple layers of spray outlets capable of moving relatively, can be adjusted in a segmented manner, can adjust and control the positions of the fog drop outlets according to the change of wind power by driving a sliding plug through blades, has the function of adjusting the spray angle along with the wind speed, realizes the change of the annular spray flow section along with the wind speed, effectively guarantees the dispersion degree of fog drops, and can be used for spraying the fog drops even if the wind speed is increased. And by increasing the diameter of the spraying section, the fog drop concentration in the wind field is relatively uniform, the spraying section is controllable, and the requirement of accurate variable spraying is met.

Description

technical field [0001] The invention belongs to the field of atomization and spraying, and relates to a spraying device, in particular to an air-driven variable spray head. Background technique [0002] The wind-driven spraying method can increase the range, significantly improve the atomization quality, increase the droplet deposition efficiency, and improve the effective utilization rate of pesticides. It is widely used in agricultural and forestry plant protection. [0003] The nozzles used in air spray spray are commonly self-priming, centrifugal, hydraulic, and gas-liquid two-phase. Among them, the gas-liquid two-phase type is divided into two types: internal mixing and external mixing. Self-priming and centrifugal nozzles have extremely low flow rates, and are often used for ultra-low-volume spraying; the spray angle of hydraulic and gas-liquid two-phase nozzles cannot be adjusted, and the spray nozzles are mist when arranged along the axis of the air duct in a variab...

AI Technical Summary

Problems solved by technology

Self-priming and centrifugal nozzles have a very low flow rate and are often used for ultra-low volume spraying; the spray angle of hydraulic and gas-liquid two-phase nozzles cannot be adjusted. The size of the flow section will shrink with the increase of the wind force, which will easily cause the uneven distribution of the droplet concentration in the aerosol flow field, affect the uniformity of the target deposition distribution, and the phenomenon that the fan power consumption increases but the spraying effect decreases, especially when the spray flow rate increases obvious

The nozzles arranged along the circumferential direction of the air duct are common in the multi-nozzle combination of the fan-type fog cannon machine. This type of spray equipment has a large spray coverage and is difficult to accurately target. There is waste of liquid medicine and environmental pollution.

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