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Electrostatic nozzle suitable for solar greenhouse

A technology for solar greenhouses and nozzles, which is applied in the direction of electrostatic spraying devices, spraying devices, spraying electric energy devices, etc., and can solve problems such as poor effect, poor electrification effect of droplets, and reduction of electric field intensity at the nozzle.

Active Publication Date: 2020-10-27
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent application CN201910669205.1 discloses an induction electrostatic atomization nozzle. By installing a high-voltage electrostatic device (electrode ring) at the entrance of the liquid pipeline, the electrode ring is kept away from the nozzle, thereby reducing the electric field strength at the nozzle. Although this design avoids the adsorption of charged droplets on the nozzle to a certain extent, because the electrode ring is far away from the nozzle, the charge of the droplets is less, so the charging effect of the droplets is poor.
[0007] Chinese patent application CN201410679106.9 discloses an air-assisted fan-shaped electrostatic spray head. Aiming at the relatively small fog cone angle of the conical spray head and the fact that the spray uniformity cannot be well guaranteed due to repeated spraying, the spray nozzle is designed. A fan-shaped electrostatic nozzle, by arranging double-plate electrodes in the electrode groove, the double-plate electrodes and the fan-shaped water film form two parallel capacitors when the nozzle is working, and both capacitors establish an electrostatic field. This design combines induction charging The advantages of technology and gas-assisted atomization technology make the droplet particle size spectrum uniform and small
[0008] Literature: Design and experiment of dual-air flow-assisted electrostatic nozzle[J]. Jiangsu Agricultural Science, 2017, 45(24):192-196. A dual-air-assisted nozzle was designed. As mentioned above, the inductive charging method used by the nozzle is not effective in the solar greenhouse environment, but the design of its double air flow channel can improve the problem of the droplets being adsorbed on the nozzle to a certain extent. And can make the droplets reach the target more quickly

Method used

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  • Electrostatic nozzle suitable for solar greenhouse
  • Electrostatic nozzle suitable for solar greenhouse
  • Electrostatic nozzle suitable for solar greenhouse

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Experimental program
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Embodiment 1

[0025] Such as figure 1 The main structural components of an electrostatic nozzle shown include an insulating airflow cover 1, a nozzle head 2, a nozzle filter 3, a nozzle seat 4, a top metal plate 5, a bottom metal plate 6, a strip electrode 7, and a charging inner cavity 8 , Pipe sleeve 9, one-way check valve 10, air inlet 11, etc. Among them, the nozzle head 2, the nozzle seat 4 and the sleeve 8 form a closed space, and in this closed space, a double fan-shaped plate capacitor composed of a top metal plate 5, a bottom metal plate 6, and a strip electrode 7 is designed as The charging unit of the spray head, the charging inner cavity 8, charges the liquid in the closed space. The liquid medicine is pumped out by the medicine box through the high-pressure pump and then reaches the charging inner chamber 8 of the electrostatic nozzle, where it is atomized and sprayed out after being charged in the charging inner chamber 8 .

[0026] Such as figure 1 As shown, the nozzle hea...

Embodiment 2

[0032] When the contact charging method is adopted, the sector-shaped capacitor plate inside the nozzle seat 4 is in direct contact with the liquid, and the high-voltage electric field generated by the plate directly charges the liquid in the charging cavity. When the charging voltage U applied to the plate is constant, the amount of charge Q generated by the capacitor is: Q=C×U, which is also a constant value, where C is the permittivity of the electrode.

[0033] From the above analysis, it can be concluded that when the charging voltage applied to the plate is constant, the amount of charge generated by the capacitor is constant. If the flow rate of the charged liquid is smaller, the charging effect of the unit liquid is better, and the charging is completed. The greater the charge of the liquid, the greater the charge of the charged droplets is of great significance in conventional plant protection operations.

[0034] Such as figure 2 As shown, the charging process of t...

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Abstract

The invention discloses an electrostatic nozzle suitable for greenhouses, relates to an electrostatic spraying technology, in particular to the electrostatic nozzle suitable for the solar greenhouse.The electrostatic nozzle comprises a nozzle body, a nozzle holder, an insulating airflow cover, a one-way check valve, a water inlet pipeline and the like. The airflow cover is designed to increase the airflow drag force at the nozzle body, so that charged droplets are prevented from being adsorbed on the nozzle body and other metal parts of a sprayer when being sprayed out from the nozzle body, and the droplet spraying speed can be increased; fan-shaped plate capacitors fixed on the inner wall of the nozzle holder are designed to form a closed charging inner cavity, and a contact charging method is adopted to charge liquid pesticide, so that the situation that charging electrodes are instable under a high-temperature and high-humidity environment due to the fact that the charging electrodes in an inductive charging method are exposed in air is avoided; and the fan-shaped plate capacitors with the strip-shaped electrodes are designed to form a non-uniform electrostatic field, so that the electric field intensity of charging is increased, the carried charge of the charged droplets is increased, and the charging effect of the droplets is improved.

Description

technical field [0001] The invention relates to electrostatic spray technology, in particular to an electrostatic spray head suitable for solar greenhouses. The utility model is used for the spraying operation of vegetation in a sun-dense greenhouse and belongs to the field of plant protection machinery. Background technique [0002] With the popularity of solar greenhouses, and in order to meet the requirements of safe pesticide application and protection of the ecological environment, how to closely combine new plant protection technologies with the greenhouse environment to achieve more efficient and greener plant protection operations in solar greenhouses is an urgent problem to be solved . [0003] Electrostatic spraying technology is a new type of pesticide application technology, mainly through inductive charging, corona charging, contact charging and other methods to charge the droplets, relying on the electrostatic effect between the charged droplets and the target...

Claims

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Application Information

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IPC IPC(8): B05B5/03B05B5/053
CPCB05B5/03B05B5/0533
Inventor 邱白晶王尚峰
Owner JIANGSU UNIV