Agricultural machinery spraying device and control method thereof

Abstract

The invention discloses an agricultural machinery spraying device and a control method thereof, and belongs to the technical field of agricultural machinery. The device comprises a supporting sleeve frame, a concave rod is arranged on one side of the supporting sleeve frame, a power assembly is arranged in the center of the top of the concave rod, rotary cylinder sleeves are symmetrically arranged at the two ends of the concave rod, stem spraying beam frames are symmetrically arranged on the inner walls of the two ends of the concave rod, and direct spraying sleeve rods are symmetrically arranged on the inner walls of the rotary cylinder sleeves; by adjusting the extending spray pipe, the supporting sleeve frame, the direct nozzle and other components in advance, the device is flexibly suitable for different crops, and it is ensured that pesticide liquid accurately covers all parts of the crops; a booster pump and a high-pressure nozzle are used for achieving range spraying, the efficiency and the utilization rate are improved, inclined airflow generated by an arc-shaped guide piece enhances contact between pesticide liquid and crops, and the coverage rate and the permeation effect are improved; automatic spraying is achieved through mechanical transmission, an automatic adjusting valve and other equipment, manual intervention is reduced, and the operation efficiency and accuracy are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, and in particular to an agricultural machinery spraying device and a control method thereof. Background Art

[0002] In the field of modern agricultural production, with the increasing demand for large-scale land management and refined management of crops, agricultural machinery spraying devices play an increasingly critical role; traditional manual spraying methods are extremely inefficient. Faced with large areas of farmland, they consume a lot of manpower and time costs, and it is difficult to ensure the uniformity of spraying. Farmers hold hand-held sprayers, which are not only labor-intensive, but also prone to physical fatigue and injury due to long-term work. In addition, due to human factors, the application amount of pesticides or fertilizers in different regions varies significantly, which cannot provide a stable and balanced nutrient supply for crop growth, thus affecting crop yield and quality.

[0003] In combination with the above content, it should be explained that: Chinese patent application number CN2023235983718 discloses an agricultural machine for spraying insecticides. The above device is used to promote the adhesion of sprayed drugs to plants by adjusting the spraying angle. However, during actual use, there are large differences in the diagnostic and treatment characteristics of drugs for plant diseases, and most traditional spraying covers the top area of ​​​​the plants, resulting in some drugs spraying for the prevention and control of root and stem diseases of plants failing to achieve the original effect.

[0004] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0005] The object of the present invention is to provide an agricultural machinery spraying device and a control method thereof to solve the problems raised.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an agricultural machinery spraying device, comprising a support sleeve frame, a concave rod is arranged on one side of the support sleeve frame, a power assembly is arranged at the center of the top of the concave rod, rotary cylinder sleeves are symmetrically arranged at both ends of the concave rod, stem spray beam frames are symmetrically arranged on the inner walls of both ends of the concave rod, direct spray sleeve rods are symmetrically arranged on the inner wall of the rotary cylinder sleeve, and the power assembly includes a booster pump and a high-pressure air pump;

[0007] A plurality of groups of extension nozzles are arranged through the top of the stem spray beam frame, a balance beam is arranged on the top of the extension nozzle, a direct spray port is arranged on the outer wall of one side of the direct spray sleeve rod, and an arc-shaped guide piece is sleeved on the outer wall of the top of the direct spray sleeve rod.

[0008] Furthermore, a shaft sleeve is provided in the middle of the other side of the support sleeve frame, telescopic cylinder frames connected to the rotary cylinder sleeve are provided at both ends of the concave rod, and regulating valves are provided on the top of the rotary cylinder sleeve and the concave frame.

[0009] Furthermore, the booster pumps are provided with multiple groups and are symmetrically arranged at both ends of the high-pressure air pump, the end face of the booster pump is provided with a water supply pipeline connected to a part of the regulating valve, the bottom of the booster pump is provided with a slag discharge valve connected to the water supply pipeline, and the top outer wall of the booster pump is provided with an injection valve.

[0010] Furthermore, an air extraction pipeline connected to the slag discharge valve is provided at the bottom of the high-pressure air pump, and an air supply pipeline connected to a part of the regulating valve is provided at the top of the high-pressure air pump.

[0011] Furthermore, a plurality of driving motors are symmetrically arranged on the outer walls on both sides of the stem spray beam frame, a hollow frame is arranged inside the upper half of the extension nozzle body, and a spring damper is arranged on the top of the hollow frame, a filter plate slidably connected to the inner wall of the extension nozzle is arranged on the top of the spring damper, and a plurality of atomizing micropores are arranged on the lower half of the extension nozzle body.

[0012] Furthermore, a plurality of groups of telescopic hoses are symmetrically arranged at the bottom of both ends of the balance beam, horizontal rotary cylinders connected to the inner wall of the concave rod are symmetrically arranged at both ends of the stem spray beam frame, and external valves connected to the telescopic hoses are symmetrically arranged at the top of both ends of the stem spray beam frame, and the external valves are connected to the water supply pipeline flange.

[0013] Furthermore, a central shaft rod connected to a rotary cylinder sleeve is provided inside the direct injection sleeve rod, and side sleeve rotary cylinders are sleeved on the outer walls of both ends of the central shaft rod close to the rod body of the rotary cylinder sleeve, and the side sleeve rotary cylinders are connected and fixed to the bottom of the arc guide vane, a plurality of groups of high-pressure nozzles are provided on a cross section of one side of the direct injection port, and a plurality of groups of air jets arranged at an inclined angle are provided on the inner wall of the bottom of the arc guide vane.

[0014] A control method for an agricultural machinery spraying device comprises the following steps:

[0015] Pre-preparation: The agricultural machinery is towed to drive the support frame into the planting field where the liquid medicine needs to be sprayed, and the downward extension length of the extension nozzle is adjusted in advance according to the length of the roots and stalks of the plants in the planting field and the overall height.

[0016] Traction direct injection: The rotary cylinder sleeve drives the central shaft to rotate, and the central shaft drives the direct injection port and the side sleeve rotary cylinder to the angle of the plant. The booster pump and the high-pressure nozzle work together to pressurize and spray the liquid medicine to the top area of ​​the plant.

[0017] The air jet guides the air to leak out, forming an inclined airflow from top to bottom above the injection range of the straight nozzle.

[0018] Traction stem spraying: The extended nozzle is slid downward in advance to adjust the length according to the height of the root stem and the overall height of the plant. The liquid medicine overflows outward along the atomization micropores at the bottom of the extended nozzle, forming a range atomization area at the bottom of the extended nozzle.

[0019] Liquid diversion process: After the liquid medicine on the traction agricultural machinery enters the booster pump through the pipe fittings and the injection valve, it is pressurized by the booster pump and then diverted along the water pipeline to the direct spray rod and stem spray beam frame area;

[0020] The high-pressure air pump draws in external air, filters it through the high-pressure air pump's own filter element, and then delivers it to the arc-shaped guide vane through the air pipeline.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention can flexibly adapt to crops of different types and growth heights by pre-adjusting the length of the extension nozzle and the height of the support sleeve, as well as the angles of the straight nozzle and the arc guide vane, ensuring that the liquid medicine can accurately cover the top, rhizome and straw area of ​​the crop. By using a booster pump and a high-pressure nozzle, the liquid medicine can be sprayed onto the crop at a higher pressure to achieve range coverage spraying, thereby improving the spraying efficiency and liquid medicine utilization rate; at the same time, the inclined airflow generated by the arc guide vane helps to promote the liquid medicine to better contact with the crop, further improving the coverage rate and penetration effect.

[0023] 2. The present invention realizes the automatic spraying of liquid medicine through the synergistic effect of mechanical transmission, automatic regulating valve, high-pressure air pump and other equipment, reduces manual intervention, and improves work efficiency and accuracy. In addition, through the design of external valve and telescopic hose, the flow direction and flow rate of liquid medicine can be conveniently adjusted. The cleaning of liquid medicine and the maintenance of extended nozzle are also considered. Impurities and undissolved drug particles are intercepted by filter disc, and the filter disc and extended nozzle are cleaned by reverse extraction of liquid medicine by high-pressure air pump, which effectively alleviates the blockage phenomenon, prolongs the service life of equipment, ensures the continuity of single operation, and helps to reduce the pollution of pesticides to the environment through precise spraying and reduced waste of liquid medicine, which meets the requirements of sustainable development of modern agriculture. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the support sleeve of the present invention;

[0027] Figure 3 It is a schematic diagram of the flow direction of liquid and gas in the power assembly of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the telescopic cylinder frame of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the stem spray beam frame of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the extended nozzle of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the direct injection sleeve rod of the present invention.

[0032] Reference numerals: 1. Support sleeve frame; 101. Concave rod; 102. Telescopic cylinder frame; 103. Rotary cylinder sleeve; 104. Regulating valve; 2. Power assembly; 201. Booster pump; 202. High-pressure air pump; 203. Slag discharge valve; 3. Stem spray beam frame; 301. Lianheng rotary cylinder; 302. External valve; 303. Telescopic hose;

[0033] 304, extension nozzle; 305, balance beam; 306, drive motor; 307, spring damper; 308, filter; 4, direct injection sleeve rod; 401, central shaft rod; 402, side sleeve rotary cylinder; 403, arc guide vane;

[0034] 404. Direct nozzle. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figure 1 - Figure 7 As shown, this embodiment is an agricultural machinery spraying device and a control method thereof, including a supporting sleeve frame 1, a concave rod 101 is arranged on one side of the supporting sleeve frame 1, a power assembly 2 is arranged at the top center of the concave rod 101, rotary cylinder sleeves 103 are symmetrically arranged at both ends of the concave rod 101, stem spray beam frames 3 are symmetrically arranged on the inner walls of both ends of the concave rod 101, direct injection sleeve rods 4 are symmetrically arranged on the inner wall of the rotary cylinder sleeve 103, and the power assembly 2 includes a booster pump 201 and a high-pressure air pump 202.

[0037] A shaft sleeve is provided in the middle of the other side of the support sleeve 1, and telescopic cylinder frames 102 connected to the rotary cylinder sleeve 103 are provided at both ends of the concave rod 101. Regulating valves 104 are provided on the rotary cylinder sleeve 103 and the top of the concave frame 101. The spraying liquid is loaded into the storage device of the traction agricultural machinery in advance, and is connected to the injection port flange of the booster pump 201 through a pipeline, and then the support sleeve 1 is connected to the traction agricultural machinery through accessories such as connecting rods. The traction agricultural machinery drives the support sleeve 1 into the planting field where the spraying liquid is required, and the downward extension length of the extension nozzle 304 is adjusted in advance according to the length and overall height of the roots, stems and stalks of the plants in the planting field.

[0038] The booster pump 201 is provided with multiple groups and symmetrically arranged at both ends of the high-pressure air pump 202. The end face of the booster pump 201 is provided with a water pipeline connected to the partial regulating valve 104. The bottom of the booster pump 201 is provided with a slag discharge valve 203 connected to the water pipeline. The top outer wall of the booster pump 201 is provided with a filling valve. After the liquid medicine on the traction agricultural machine enters the inside of the booster pump 201 through the pipe fittings and the filling valve, it is pressurized by the booster pump 201 and then diverted along the water pipeline to the direct spray sleeve rod 4 and the stem spray beam frame 3 area. Figure 3 Opening arrows.

[0039] The bottom of the high-pressure air pump 202 is provided with an air extraction pipeline connected to the slag discharge valve 203, and the top of the high-pressure air pump 202 is provided with an air supply pipeline connected to the partial regulating valve 104. The high-pressure air pump 202 extracts external air, and after filtering it through the filter element of the high-pressure air pump 202, the air is transported to the arc-shaped guide plate 403 through the air supply pipeline. Figure 3 Indicated by hollow arrows.

[0040] At the same time, when the extended nozzle 304 continues to pass through the liquid medicine, there are impurities or undissolved drug particles in part of the liquid medicine, which are first intercepted by the filter 308. The drug particles are dissolved as the liquid medicine continues to pass through, and the impurities are retained and accumulated on the filter 308. After a certain amount of accumulation, the flow of liquid medicine in the extended nozzle 304 is blocked. Accordingly, the spring damper 307 is pushed and compressed by the filter 308. When the traction agricultural machine is stopped or turned around, the operator starts the connection between the high-pressure air pump 202 and the air extraction pipeline, and disconnects the connection between the booster pump 201 and the water delivery pipeline. The compressed air pump 202 is connected to the unloading valve through the suction pipe, and continuously extracts the liquid retained in the water supply pipe, so that the liquid medicine in the water supply pipe is emptied, and the liquid medicine in the extension nozzle 304 is reversely extracted, so that the impurities retained on the filter 308 flow in the reverse direction with the liquid medicine, until the liquid medicine is discharged along the unloading valve 203, so as to alleviate the blockage phenomenon inside the extension nozzle 304. While waiting for the device to be repaired, the extension nozzle 304 is carefully cleaned. It should be noted that the aperture of the straight nozzle 404 is larger than the atomizing micropore. Therefore, some impurities in the straight nozzle 404 can be directly cleaned by spraying the liquid medicine.

[0041] Embodiment 2: This embodiment is an agricultural machinery spraying device and a control method thereof, including a stem spray beam frame 3 having multiple groups of extension nozzles 304 penetrating the top, a balance beam 305 being provided on the top of the extension nozzles 304, a direct spray port 404 being provided on the outer wall on one side of the direct spray sleeve 4, and an arc-shaped guide vane 403 being sleeved on the outer wall at the top of the direct spray sleeve 4.

[0042] A plurality of drive motors 306 are symmetrically arranged on the outer walls on both sides of the stem spray beam frame 3, a hollow frame is arranged in the upper half of the extension nozzle 304, and a spring damper 307 is arranged on the top of the hollow frame, a filter 308 is arranged on the top of the spring damper 307 and is slidably connected to the inner wall of the extension nozzle 304, and a plurality of atomization micropores are arranged on the lower half of the extension nozzle 304.

[0043] The outer wall of the upper half of the extension nozzle 304 is recessed with symmetrical teeth, and the extension nozzle 304 is slidably sleeved in the stem spray beam frame 3. With the operation of the drive motor 306, the drive motor 306 is meshed with the teeth of the extension nozzle 304 through mechanical accessories such as gear couplings. When the support sleeve 1 enters the plant area, the extension nozzle 304 is slid downward in advance to adjust the length according to the height of the roots and stems of the plants and the overall height, to ensure that the atomizing micropore area at the bottom of the extension nozzle 304 covers the root and stem area of ​​the plant. With the advancement of the traction agricultural machinery, the extension nozzle 304 moves along the planting interval in the middle of the plants. It should be noted that the plants are some of the plants in the Poaceae family. The spacing between the extension nozzles 304 is adjusted according to actual needs. In addition, modern agricultural planting is carried out by mechanical sowing, and the Poaceae plants are planted in an orderly arrangement.

[0044] A plurality of sets of telescopic hoses 303 are symmetrically arranged at the bottom of both ends of the balance beam 305, a horizontal rotary cylinder 301 connected to the inner wall of the concave rod 101 is symmetrically arranged at both ends of the stem spray beam frame 3, and an external valve 302 connected to the telescopic hose 303 is symmetrically arranged at the top of both ends of the stem spray beam frame 3, and the external valve 302 is flange-connected to the water supply pipeline.

[0045] The external valve 302 is connected to the flange of the part of the regulating valve 104 through the branch pipe, and is used to guide the liquid medicine inside the part of the water delivery pipeline into the telescopic hose 303. The telescopic hose 303 guides the liquid medicine into the balance beam 305. After the balance beam 305 evenly distributes the liquid medicine to each group of extension nozzles 304, the liquid medicine in the extension nozzle 304 is continuously pressurized, and then the liquid medicine overflows outward along the atomization micropores at the bottom of the extension nozzle 304, forming a range atomization area at the bottom area of ​​the extension nozzle 304, such as Figure 6As shown, as the towing agricultural machinery continues to move forward, the roots, stems and stalks of the plants it passes by are sprayed with the medicine liquid, and the airflow guided by the upper arc-shaped guide vane 403 and the pneumatic force generated by the movement of the towing agricultural machinery cause the medicine liquid mist to move in the root, stem and stalk area of ​​the plants, thereby accelerating the surface coverage process of the medicine mist and the roots, stems and stalks of the plants, and greatly improving the overall contact efficiency and coverage uniformity between the medicine liquid and the plants.

[0046] A central shaft 401 sleeved with the rotary cylinder sleeve 103 is provided inside the direct injection sleeve rod 4, and side sleeve rotary cylinders 402 are sleeved on the rod body of the outer wall at both ends of the central shaft 401 close to the rotary cylinder sleeve 103. According to the overall height of the plants exposed to the soil in the planting field, the vertical height between the support sleeve 1 and the plants is adjusted by the external connecting piece on the traction agricultural machine, and the central shaft 401 is driven to rotate by the rotary cylinder sleeve 103. The central shaft 401 drives the direct injection port 404 and the side sleeve rotary cylinder 402 to face the angle of the plants, and the side sleeve rotary cylinder 402 drives the arc guide vane 403 to rotate, and the coverage angle between the arc guide vane 403 and the plants and the direct injection area is further adjusted;

[0047] The interior of the direct injection port 404 is connected to the regulating valve 104 on the rotary cylinder sleeve 103 through a branch pipe, and accordingly, part of the liquid medicine in the water pipe is guided into the direct injection port 404, and the liquid medicine is pressurized and sprayed toward the top area of ​​the plant under the coordinated action of the booster pump 201 and the high-pressure nozzle, thereby achieving a wide coverage spraying of the liquid medicine to the rear area where the towing agricultural machinery passes.

[0048] The side sleeve rotary cylinder 402 is connected and fixed to the bottom of the arc guide plate 403, a plurality of groups of high-pressure nozzles are arranged on the cross section of one side of the straight nozzle 404, a plurality of groups of air nozzles arranged at an inclined angle are arranged on the inner wall of the bottom of the arc guide plate 403, an air cavity is arranged inside the arc guide plate 403, and a telescopic air pipe connected to the flange of the gas transmission pipeline is arranged at the bottom of the air cavity, which is used to guide the internal airflow of the high-pressure air pump 202 into the air cavity, and the air nozzle guides it to leak out. At this point, an inclined airflow from top to bottom is formed above the injection range of the straight nozzle 404, which is not only used to push the top area of ​​the plant to sway with the wind, but also used to promote part of the ejected liquid medicine, and the liquid medicine that bursts after contacting the top of the plant to change the moving direction, which is used to assist the liquid medicine of the straight nozzle 404 to contact with the plant, and the arc guide plate 403 is used to prevent the sprayed liquid medicine from flying up with the wind, thereby improving the coverage rate of the liquid medicine on the plant.

[0049] In combination with Example 1 and Example 2, the present invention flexibly adapts to different crops by pre-adjusting components such as the extension nozzle 304, the support sleeve 1 and the straight nozzle 404 to ensure that the liquid medicine accurately covers all parts of the crops; the booster pump 201 and the high-pressure nozzle are used to achieve range spraying to improve efficiency and utilization rate; the inclined airflow generated by the arc guide vane 403 enhances the contact between the liquid medicine and the crop, thereby improving the coverage rate and penetration effect.

[0050] Automated spraying is achieved through mechanical transmission, automatic regulating valve 104 and other equipment, reducing manual intervention and improving work efficiency and accuracy. At the same time, the cleaning process of external valve 302, telescopic hose 303 and filter 308 is designed to facilitate the adjustment of the flow direction and flow rate of the liquid medicine, effectively alleviate blockage, extend equipment life, accurately spray and reduce waste, which meets the requirements of sustainable development of modern agriculture.

[0051] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Related accessories include couplings, screws, gears, gaskets and other commonly used mechanical connection components in this field, but are not limited thereto. They are replaced and adapted according to actual use.

[0053] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An agricultural spraying device, comprising a support frame (1), characterized in that: A concave rod (101) is arranged on one side of the support sleeve frame (1), a power assembly (2) is arranged at the center of the top of the concave rod (101), rotating cylinder sleeves (103) are symmetrically arranged at both ends of the concave rod (101), stem spray beam frames (3) are symmetrically arranged on the inner walls of both ends of the concave rod (101), and direct injection sleeve rods (4) are symmetrically arranged on the inner wall of the rotating cylinder sleeve (103), and the power assembly (2) includes a booster pump (201) and a high-pressure air pump (202); A plurality of groups of extension nozzles (304) are arranged through the top of the stem spray beam frame (3), a balance beam (305) is arranged on the top of the extension nozzle (304), a direct spray port (404) is arranged on the outer wall of one side of the direct spray sleeve (4), and an arc-shaped guide vane (403) is sleeved on the outer wall of the top of the direct spray sleeve (4).

2. The agricultural spraying device according to claim 1, characterized in that: A shaft sleeve is arranged in the middle of the other side of the support sleeve frame (1), telescopic cylinder frames (102) connected to the rotary cylinder sleeve (103) are arranged at both ends of the concave rod (101), and regulating valves (104) are arranged on the top of the rotary cylinder sleeve (103) and the concave frame (101).

3. The agricultural spraying device according to claim 2, characterized in that: The booster pump (201) is provided with multiple groups and is symmetrically arranged at both ends of the high-pressure air pump (202); the end surface of the booster pump (201) is provided with a water pipeline connected to a part of the regulating valve (104); the bottom of the booster pump (201) is provided with a slag discharge valve (203) connected to the water pipeline; and the top outer wall of the booster pump (201) is provided with a material injection valve.

4. The agricultural spraying device according to claim 4, characterized in that: An air extraction pipeline connected to the slag discharge valve (203) is provided at the bottom of the high-pressure air pump (202), and an air delivery pipeline connected to a part of the regulating valve (104) is provided at the top of the high-pressure air pump (202).

5. The agricultural spraying device according to claim 1, characterized in that: A plurality of drive motors (306) are symmetrically arranged on the outer walls of both sides of the stem spray beam frame (3); a hollow frame is arranged inside the upper half of the extension nozzle (304), and a spring damper (307) is arranged on the top of the hollow frame; a filter (308) is arranged on the top of the spring damper (307) and is slidably connected to the inner wall of the extension nozzle (304); and a plurality of atomization micropores are arranged on the lower half of the extension nozzle (304).

6. The agricultural spraying device according to claim 5, characterized in that: A plurality of groups of telescopic hoses (303) are symmetrically arranged at the bottom of both ends of the balance beam (305), a horizontal rotary cylinder (301) connected to the inner wall of the concave rod (101) is symmetrically arranged at both ends of the stem spray beam frame (3), and an external valve (302) connected to the telescopic hose (303) is symmetrically arranged at the top of both ends of the stem spray beam frame (3), and the external valve (302) is flange-connected to the water supply pipeline.

7. The agricultural spraying device according to claim 1, characterized in that: The direct injection sleeve rod (4) is provided with a central shaft rod (401) sleeved with the rotary cylinder sleeve (103) running through the interior thereof; side sleeve rotary cylinders (402) are sleeved on the outer walls of both ends of the central shaft rod (401) close to the rod body of the rotary cylinder sleeve (103); the side sleeve rotary cylinders (402) are connected and fixed to the bottom of the arc-shaped guide vane (403); a plurality of groups of high-pressure nozzles are provided on a cross section of one side of the direct injection port (404); and a plurality of groups of air jets arranged at an inclined angle are provided on the inner wall of the bottom of the arc-shaped guide vane (403).

8. A control method for an agricultural spraying device, used for the agricultural spraying device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Pre-preparation: the agricultural machine is pulled to drive the support frame (1) into the planting field where the liquid medicine needs to be sprayed, and the downward extension length of the extension nozzle (304) is adjusted in advance according to the length and overall height of the roots, stems and stalks of the plants in the planting field; Traction direct injection: the rotary cylinder sleeve (103) drives the central shaft (401) to rotate, and the central shaft (401) drives the direct injection port (404) and the side sleeve rotary cylinder (402) to face the angle of the plant; the booster pump (201) and the high-pressure nozzle cooperate to pressurize the liquid medicine and spray it toward the top area of ​​the plant; At the same time, the air jet guides the air to leak out, forming an inclined airflow from top to bottom above the spray range of the straight nozzle (404); Traction stem spraying: the extended nozzle (304) is slid downward in advance to adjust the length according to the height of the root, stem, and stalk of the plant and the overall height; the liquid medicine overflows outward along the atomization micropores at the bottom of the extended nozzle (304), forming a range atomization area at the bottom area of ​​the extended nozzle (304); Liquid introduction process: After the liquid medicine on the traction agricultural machinery enters the inside of the booster pump (201) through the pipe fittings and the injection valve, it is pressurized by the booster pump (201) and then diverted along the water pipeline to the direct spray sleeve rod (4) and the stem spray beam frame (3) area. The high-pressure air pump (202) draws external air, which is filtered by the filter element of the high-pressure air pump (202) and then transported to the arc guide plate (403) through the air pipeline.

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