Anti-drifting pneumatic atomizer capable of regulating and controlling particle size of fog drops on line and control method

Abstract

The invention relates to an anti-drifting pneumatic atomizer capable of regulating and controlling the particle size of fog drops on line and a control method thereof. The atomizer comprises an atomizer body and a fan-shaped atomizing cavity; the atomizer body is composed of a chemical liquid flow guide cavity, a gas flow guide cavity and an electromagnetic flow valve; the rear part of the chemical liquid flow guide cavity is connected to the electromagnetic flow valve; the front part of the chemical liquid flow guide cavity is provided with a fan-shaped nozzle; the gas flow guide cavity is ahollow cone and wraps the outer side of the chemical liquid flow guide cavity; a plurality of circular gas outlets with different gas outlet angles are formed in the front part of the gas flow guide cavity and are distributed around the fan-shaped nozzle. According to the atomizer, a pneumatic atomizing mode is adopted to carry out primary atomizing on chemical liquid by means of crossed gas flow,in addition, the gas flow and the chemical liquid flow are adjusted independently, and therefore different gas-liquid mixing ratios are dynamically achieved, and the requirements for the anti-drifting capability and the penetrating capability of the fog drops are met; and meanwhile, the pressure amplitude of an ultrasonic stationary field in the fan-shaped atomizing cavity is adjusted on line, ultrasonic secondary atomizing is carried out on the fog drops, and therefore on-line dynamic regulation and control over the particle size of the fog drops are realized, and the atomizing uniformity isimproved.

Description

technical field [0001] The invention relates to the technical field of plant protection spraying, in particular to an anti-drifting pneumatic atomization nozzle and a control method for online regulation and control of droplet size. Background technique [0002] In the process of agricultural plant protection spraying, the atomizing nozzle is the working part that produces atomized droplets, which determines the atomization effect and has a direct impact on the final application effect. Most of the existing plant protection atomization nozzles adopt the principle of pressure atomization. Their structural parameters are fixed, and the particle size range of the generated droplets is relatively fixed. It is difficult to adjust the particle size spectrum of the droplets online according to the change of the operation object or the change of the crop condition. . At the same time, although the fine mist droplets have good deposition uniformity, their anti-drift ability is poor,...

AI Technical Summary

Problems solved by technology

The essence of this invention is the combination of multiple pressure atomizing nozzles, which can only be selected offline, and the principle of pressure atomization is still used, which cannot fundamentally solve the problem of wide droplet size spectrum and particle size distribution in the pressure atomizing nozzle itself. Problems such as unevenness, spray holes being worn and thickened by the chemical liquid after long-time work, and poor atomization effect

Invention patent "a gas-liquid two-phase secondary atomization nozzle", patent application number 201610913406.8, discloses a nozzle device for gas-liquid two-phase secondary mixed atomization, which uses the incident air flow to achieve better atomization effect; its Use the incident airflow to generate local negative pressure to suck the liquid medicine into the mixing chamber. There is a strong coupling relationship between the airflow and the liquid medicine, and the gas-liquid mixing ratio cannot be effectively controlled.

This patent also uses the principle of pneumatic atomization to adjust the size of the air outlet by the hand wheel to change the size of the atomized particles. There is also a strong coupling relationship between the air flow and the liquid medicine, and it does not have the ability to adjust online. At the same time, the nozzle is designed for the chemical production field and has a relatively Complicated, not suitable for field plant protection operations

[0004] In summary, although some pneumatic atomizing nozzles or gas-liquid two-phase secondary atomizing nozzles have appeared in the field of plant protection spraying and spraying, which have certain atomization effects and droplet anti-drift capabilities, there is still a lack of online adjustment of droplets. Particle size spectrum, the droplet size is small and evenly distributed, and the air flow and liquid medicine can be independently adjusted to achieve different gas-liquid mixing ratios.

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