Air curtain device of wide-range plant protection work

Abstract

The invention relates to the field of plant protection work machinery of agricultural machinery, and discloses an air curtain device special for a fan-shaped spray head for wide-range plant protectionwork. The air curtain device comprises a fan, a fan blast pipe, a central rack, an air outlet pipe, a central air curtain pipe, a right air curtain pipe, a left air curtain pipe, a left air curtain pipe stopper, a right curtain pipe stopper, sealing tents, an air curtain pipe fixing support, rack air pipes, side arm supports and a fan-shaped spraying unit assembly. According to the air curtain device special for the fan-shaped spray head for wide-range plant protection work, by means of the air curtain pipes, designed by adopting a Coanda effect edge air flow speed increase principle, specialfor the fan-shaped spray head, the air volume in an air curtain work process is reduced, energy consumption in a pesticide spraying process is reduced, the designed air curtain pipes are simple in structure, the air curtain device is light in weight, delicate and compact in structure and convenient to install and assemble, the center of gravity of work equipment is lowered, air blowing is even and high in directivity, drift of the fan-shaped spray head in the pesticide spraying process is greatly reduced, the air curtain device blows air evenly, and the concentration degree is high so that drift of fog droplets in the work process can be greatly reduced.

Description

technical field [0001] The invention relates to the field of agricultural machinery, in particular to the field of agricultural plant protection operation machinery, and is suitable for the spraying operation of fan-shaped nozzles. Background technique [0002] The existing wide operation spraying machine mainly has the following disadvantages: [0003] 1. During the operation of the spraying machine, due to the walking speed and the effect of the wind force in the natural environment, the spraying process of the spray head causes the drift of the spray droplets, which seriously affects the environment. The existing one is composed of an axial flow fan and an anti-leakage air curtain. The air curtain device can solve the problem of drug droplet drift to a certain extent. [0004] 2. The structure of the existing air curtain device is complex. If a certain part of the air curtain is damaged, the entire curtain needs to be replaced. Moreover, the wind direction of the traditi...

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Problems solved by technology

[0004] 2. The structure of the existing air curtain device is complex. If a certain part of the air curtain is damaged, the entire curtain needs to be replaced. Moreover, the wind direction of the traditional air curtain is scattered, and the axial flow fan is required to generate a large amount of wind to maintain the continuity of the air curtain. At the same time, due to the wide operation, the air flow velocity difference between the two ends of the machine tool and the middle position is large, and the wind speed is unstable.

[0005] 3. The structure of the existing air curtain device is relatively large, and the axial flow fan needs to be installed at a higher position to realize the transmission of the air flow. The installation at a higher position also leads to a higher center of gravity of the plant protection work equipment, especially the high ground clearance work machine, which is easy to operate on slopes. Large plots roll over, seriously affecting the safety of machines, tools and personnel

[0006] 4. With the development of intelligent agricultural machinery equipment, the energy density of new energy agricultural machinery is limited. The traditional air curtain device does not adopt a more reasonable aerodynamic structure, which requires more air and consumes a lot of energy, which affects the entry operation of agricultural machinery time

[0007] 5. For the existing patented products or technologies designed based on the Coanda effect, they have certain better effects in their technical fields, but in the plant protection tools of agricultural machinery, their installation methods, later maintenance, and scalability need to be considered , versatility, wide-width operation, air pressure stability, and airflow stability, which cannot meet the requirements of plant protection operations.

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