Water-swirl gas direct injection type pesticide spraying device

Abstract

The invention discloses a water-swirl gas direct injection type pesticide spraying device. An outer tube is connected with a water tank; a central tube is connected with a compressed air storage tank; the outer tube and the central tube are jacket type structures; the front end of the central tube is provided with a gas spraying hole; compressed air in the central tube is directly sprayed into a Laval curved surface expansion chamber from rear to front; a tapered part of the central tube is coaxially embedded into the outer tube in a non-full-contact manner; an inner guide cross-section of the outer tube has a changing process of reducing and then enlarging; pressurized water flows forwards in a tapered-barrel-shaped throttling channel between the outer tube and the central tube, and is sprayed into the Laval curved surface expansion chamber in a rotary manner by virtue of a spiral runner between a swirler and the central tube; by virtue of the Laval effect, a gas-water mixture is conveyed towards a spraying tube; pesticides are added through a dosing cup; and the mixture is uniformly sprayed out at a high speed from a spraying hole in front of the spraying tube. The water-swirl gas direct injection type pesticide spraying device is simple, reliable and delicate in structure, low in cost, capable of using potential energy of the compressed air to promote gas-liquid homogenization most effectively and converting the potential energy into jetting and flying power, so that most efficient and high-quality pesticide spraying operation is realized.

Description

technical field [0001] The invention relates to a pesticide spraying device, in particular to a water cyclone direct injection pesticide spraying device utilizing the working principle of a Lafal nozzle. Background technique [0002] Spraying pesticides is an operation method often used in agriculture, forestry and horticulture, and spraying pesticides on leaves can be used for operations such as eliminating diseases and insect pests. Generally speaking, spraying pesticides on the leaves of low crops has relatively low requirements for distance, uniformity and energy loss, but if spraying pesticides on the leaves of tall trees, the spraying distance is relatively low. , uniformity and energy loss have higher requirements, otherwise it will bring a lot of inconvenience. [0003] Existing pesticide 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 ...

AI Technical Summary

Problems solved by technology

Generally speaking, spraying pesticides on the leaves of low crops has relatively low requirements for distance, uniformity and energy loss, but if spraying pesticides on the leaves of tall trees, the spraying distance is relatively low. , uniformity and energy loss have high requirements, otherwise it will bring a lot of inconvenience

[0003] The existing pesticide spraying devices have done a good job in spraying uniformity. The atomizing nozzles can often make the spraying very uniform, but there are also defects of insufficient spraying power and small range.

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