Secondary atomization two-phase flow nozzle

Abstract

The invention discloses a secondary atomization two-phase flow nozzle. The secondary atomization two-phase flow nozzle comprises a feeding sleeve, a flow guide pipe, a flow guide rubber ring, a flow distribution pipe, an ejection needle and two atomization nozzles, wherein the flow distribution pipe, the flow guide pipe and the feeding sleeve are connected in sequence from front to back; the flow guide rubber ring is arranged between the flow distribution pipe and the flow guide pipe; a first atomization nozzle and a second atomization nozzle are fixedly connected with two sides of the center of a front end of the flow distribution pipe; the first atomization nozzle and the second atomization nozzle are mounted at the front end of the flow distribution pipe in a manner of being obliquely and symmetrically arranged; the feeding sleeve is provided with a gas inlet for introducing compressed gas and a liquid inlet for introducing liquid; a central gas inlet flow guide hole is formed in the front end of the center of the flow distribution pipe along the axis direction; the ejection needle is arranged in the central gas inlet flow guide hole. According to the secondary atomization two-phase flow nozzle, a manner of combining gas-liquid two-phase flow primary atomization with secondary collision is adopted, and a lot of ultrafine fog drops can be generated; the disadvantages that a traditional technology cannot combine large atomization amount, fine grain diameter, long emission range and directed spraying are overcome.

Description

technical field [0001] The invention belongs to a pesticide application device in the field of plant protection machinery, and more specifically relates to a secondary atomization two-phase flow nozzle. Background technique [0002] Chemical control has the characteristics of high work efficiency and timely control, and has played a huge role in crop protection. According to statistics, China's chemical control of plant diseases and insect pests saves an average of more than 75 billion kg of grain production loss per year, accounting for about 15% of China's annual grain production. Chemical control is an effective measure to reduce the frequent occurrence of crop diseases, insect pests and weeds, ensure stable and increased grain production, and ensure the quality and safety of agricultural products. . [0003] At present, manual sprayers with simple structures are commonly used in Chinese agriculture for large-volume, blind, and asymmetrical application of pesticides. The...

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Problems solved by technology

[0003] At present, manual sprayers with simple structures are commonly used in Chinese agriculture for large-volume, blind, and asymmetrical application of pesticides. There are relatively serious phenomena such as "running, running, dripping, and leaking" and the amount of pesticide spraying is large. The particle size of the generated droplets is coarse, the adhesion rate on the crops is low, and the utilization rate of pesticides is only about 30%, resulting in a decrease in the control effect and an increase in the amount of pesticides

In addition, most of the pesticides conventionally sprayed settle on the land and drift into the surrounding environment, seriously polluting and destroying the agricultural ecological environment, causing quality and safety problems of agricultural products, and even causing human and animal poisoning

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