Air-water full-rotation type foliage spray device

Abstract

The invention discloses an air-water full-rotation foliage spray device. According to the invention, an external pipe is connected with a compressed air storage tank; a central pipe is connected with a water tank; the external pipe and the central pipe are of a jacket structure; the front end of the central pipe is provided with a liquid spray opening; a liquid in the central pipe is rotationally sprayed into a Laval curved-surface expansion chamber through a spiral flow channel arranged between a swirler and a mandrel; the conical part of the central pipe is coaxially embedded into the external pipe in non-full contact; a draft section in the external pipe undergoes the process of changing from shrinking to enlarging; compressed air flows forward in a conical-cylinder-shaped throttle channel arranged between the external pipe and the central pipe and is also rotationally sprayed into the Laval curved-surface expansion chamber through the spiral flow channel arranged between the swirler and the central pipe; and Laval effect enables an air-water mixture to be transported to a spray pipe located at the front of the liquid spray opening and eventually jetted out at a high speed from an spray opening located at the front of the spray pipe. The device provided by the invention has the advantages of simple structure, reliability, craftiness and low cost and can most effectively transform potential energy of the compressed air into power for jet fly; meanwhile, mixing of air and liquid is uniform, so highly-efficient and high-quality spray operation is realized.

Description

technical field [0001] The invention relates to a foliage spraying device, in particular to an air-water full-rotating foliage spraying device utilizing the working principle of a Lafal nozzle. Background technique [0002] Foliar spraying is an operation method often used in agriculture, forestry and horticulture. Foliar spraying can be used for operations such as eliminating diseases and insect pests and topdressing foliage. Generally speaking, foliar spraying of low crops has relatively low requirements for distance, uniformity and energy loss, but if foliar spraying of tall trees, the requirements for spraying distance, uniformity and energy consumption are relatively low. There are high requirements for speed and energy loss, otherwise it will bring a lot of inconvenience. [0003] Existing foliage spraying devices have done a good job in spraying uniformity. Atomized nozzles can often make spraying very uniform, but there are also defects such as insufficient spraying...

AI Technical Summary

Problems solved by technology

Generally speaking, foliar spraying of low crops has relatively low requirements for distance, uniformity and energy loss, but if foliage spraying is used for tall trees, the requirements for spraying distance, uniformity and energy consumption are relatively low. There are high requirements for speed and energy loss, otherwise it will bring a lot of inconvenience

[0003] Existing foliage spraying devices have done a good job in spraying uniformity. Atomized nozzles can often make spraying very uniform, but there are also defects such as insufficient spraying power and small range

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