Induction charging and corona charging combined two-stage charging atomizing nozzle

Abstract

The invention relates to an induction charging and corona charging combined two-stage charging atomizing nozzle. The induction charging and corona charging combined two-stage charging atomizing nozzlecomprises a pesticide solution spray pipe, an airflow spray pipe and a conical charging cavity; the middle of the pesticide solution spray pipe is embedded with a ring-shaped pesticide solution electrode, the rear of the pesticide solution spray pipe is provided with a pesticide solution inlet, and the front portion of the pesticide solution spray pipe is a conical spray nozzle; the airflow spraypipe wraps the pesticide solution spray pipe, the front of the airflow spray pipe is provided with a ring-shaped air outlet, and the air outlet angle of the airflow spray pipe is identical to the opening angle of the conical charging cavity; the conical charging cavity is connected with the front portions of the pesticide solution spray pipe and the airflow spray pipe, the middle of the inner wall of the conical charging cavity is embedded with a ring-shaped induction electrode, and the front opening of the conical charging cavity is provided with a corona electrode with 8 corona needles; thepesticide solution electrode and the corona electrode are connected with the negative electrode of a power supply, the induction electrode is connected with the positive electrode of the power supply, pesticide solution is sprayed and atomized via the conical spray nozzle and meanwhile induces negative charges to complete a primary charging process; the 8 corona needles of the corona electrode discharge under action of corona voltage, negative charge ions encounter with and are combined with charged droplets when moving towards the induction electrode to complete a secondary charging process.

Description

technical field [0001] The present invention relates to the technical field of plant protection spraying, in particular to a two-stage charging atomizing nozzle combined with induction charging and corona charging and a control method thereof, which are used to achieve a higher charge-to-mass ratio of droplets and a more ideal drug spraying method. Liquid atomization effect. Background technique [0002] The plant protection electrostatic spray technology uses high-voltage static electricity to atomize the liquid medicine into charged droplets through corona, induction and contact, and improves the atomization effect of the liquid medicine. The charged droplets move towards the target crops under the action of the electrostatic field. Affected by the electrostatic force, they can evenly adhere and deposit everywhere on the crops, which improves the uniformity of the deposition of the droplets and the utilization rate of the liquid medicine, and enhances the control effect of...

AI Technical Summary

Problems solved by technology

The problem with this device is that only the outer surface of the electrode is surrounded by an insulating layer, and there is no insulation between the inner wall of the electrode and the mist flow. In the high-humidity environment of the spray, the mist flow must obtain electrostatic induction without leakage. The cone ring electrode The diameter is necessarily large, and its inductive charging effect is limited

However, according to electrical engineering principles, the water riser will share most of the electrostatic voltage between the ring electrode and the nozzle, so that the electric field strength in the air gap between the water riser and the nozzle will be greatly reduced, which is not conducive to the smooth progress of electrostatic induction charging, so the ideal The charge-to-mass ratio level (see "A capacitive type of electrostatic spraying nozzle" on pages 363-379, Volume 57, Issue 3, Issue 3, 2003, for the principle)

[0004] In summary, the electrostatic atomization nozzles used in the current plant protection electrostatic spray technology generally have unsatisfactory charging effects and relatively low charge mass, which cannot give full play to the advantages of electrostatic spraying.

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