An unmanned aerial vehicle orchard pesticide spraying device

Abstract

This utility model relates to the field of orchard spraying technology and discloses a drone-based orchard spraying device, including a body. A spraying mechanism is provided on the lower surface of the body. The spraying mechanism includes a pesticide storage tank, which is fixedly connected to the lower surface of the body. Positioning blocks are fixedly connected to both sides of the storage tank. A collar is fixedly connected to the end of each positioning block away from the storage tank. A support tube is rotatably connected to the inner wall of the collar. A nozzle is fixedly connected to the lower surface of the support tube, and a guide tube is fixedly connected to the upper surface of the support tube. In this utility model, by combining a counterweight with a telescopic rod adjustment device, the nozzle can maintain a stable vertical downward spraying state, and the angle of the nozzle can be flexibly adjusted by driving a push plate through the telescopic rod. When tilted upward, it can cover the upper part of the tree canopy; when retracted, it returns to vertical spraying of the ground, meeting the needs of precise spraying of fruit trees at all heights and in all areas, and solving the problem that traditional fixed nozzles cannot cover the top of the tree canopy.

Description

Technical Field

[0001] This utility model relates to the field of orchard spraying technology, specifically to a drone orchard spraying device. Background Technology

[0002] Orchard spraying is an important measure in orchard management to prevent and control pests and diseases, ensure the healthy growth of fruit trees, and maintain fruit quality. Using sprayers, pesticides are evenly sprayed onto the leaves, branches, and fruit surfaces to prevent and control pests and diseases such as aphids, fruit borers, powdery mildew, and anthracnose. When spraying, it is necessary to select the appropriate pesticide type, concentration, and spraying time based on the type of pest or disease, the growth stage of the fruit tree, and climatic conditions. This ensures the pesticide is effective while avoiding phytotoxicity, protecting the fruit and protecting the environment, thereby increasing orchard yield and economic benefits. With social development, drones are often used to assist in orchard spraying.

[0003] Currently, most drone sprayers have fixed nozzles. When the drone is spraying, it is tilted forward, and the nozzle sprays pesticide backward, which can easily lead to spraying deviation and a lot of waste. To address this, we propose a drone orchard spraying device. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a drone orchard spraying device, which solves the problem that most existing drone sprayers have fixed nozzles. When the drone is in a forward-leaning position during spraying, the nozzles spray pesticides backward, which can easily lead to spraying deviations and significant waste.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a drone-based orchard spraying device, comprising a body, a spraying mechanism disposed on the lower surface of the body, the spraying mechanism including a pesticide storage tank, the pesticide storage tank being fixedly connected to the lower surface of the body, positioning blocks being fixedly connected to both sides of the pesticide storage tank, a collar being fixedly connected to the end of the positioning block away from the pesticide storage tank, a support tube being rotatably connected to the inner wall of the collar, a nozzle being fixedly connected to the lower surface of the support tube, and a guide tube being fixedly connected to the upper surface of the support tube, the guide tube being located away from the support tube. One end of the support tube is connected to the medicine storage box. Both ends of the support tube are fixedly connected to the stop blocks. The lower surface of the stop blocks is fixedly connected to the connecting blocks. The lower end of the connecting blocks is fixedly connected to the counterweight. By combining the counterweight with the telescopic rod adjustment device, the nozzle can maintain a stable vertical downward spraying state. At the same time, the nozzle angle can be flexibly adjusted by driving the push plate through the telescopic rod. When tilted upward, it can cover the upper part of the tree canopy. When retracted, it returns to vertical spraying of the ground, meeting the needs of precise spraying of fruit trees at all heights and in all areas, and solving the problem that traditional fixed nozzles cannot cover the top of the tree canopy.

[0008] Preferably, a support rod is fixedly connected to the surface of the machine body, and a positioning frame is fixedly connected to the end of the support rod away from the machine body. A motor is installed inside the positioning frame, and a fan blade is fixedly connected to the drive end of the motor. A camera is installed on one side of the machine body. The camera enables real-time monitoring of orchard operations, allowing operators to remotely observe the spraying effect, the growth status of fruit trees, and the operating status of the equipment. This allows for timely adjustments to the drone's flight path and spraying parameters, preventing missed or repeated spraying. The airflow generated by the fan blades assists in the atomization of the pesticide, improving the penetration and adhesion of the pesticide between branches and leaves, and enhancing the efficacy.

[0009] Preferably, the upper surface of the machine body is fixedly connected to a feed port, and a sealing cap is threaded onto the feed port. The feed port facilitates the addition of sprayed drugs, and the sealing cap seals the feed port after the drug addition is completed.

[0010] Preferably, an anti-detachment rope is fixedly connected to the upper surface of the machine body, and the end of the anti-detachment rope away from the machine body is connected to the sealing cover to prevent the sealing cover from falling off.

[0011] Preferably, there are multiple nozzles arranged at equal intervals. These equally spaced nozzles provide basic coverage over a large area. During spraying, the nozzles are kept in a naturally drooping state by a counterweight, ensuring that the nozzles always spray downwards while the drone is flying normally. This achieves basic coverage of the lower and middle leaves, fruits, and ground weeds of the fruit trees. The multiple equally spaced nozzles expand the coverage area of ​​a single spray, improving spraying efficiency. When the spray angle needs to be adjusted, the control lever drives the push plate upwards, pulling the rope connecting the counterweight. The rope then tightens, causing the counterweight and connecting block to rotate, which in turn causes the support tube to rotate around the collar, thus changing the nozzle's tilt angle. When the telescopic rod extends, the nozzle can tilt upwards to spray the upper part of the fruit tree canopy. When the telescopic rod retracts, the nozzle returns to a vertically downward state, facilitating spraying of the ground area and meeting the spraying needs of plants of different heights in the orchard.

[0012] Preferably, an adjustment device is provided on the side of the medicine storage tank near the positioning block. The adjustment device includes a mounting block, which is fixedly connected to the side of the medicine storage tank near the positioning block. A telescopic rod is fixedly connected to the inner wall of the mounting block. A push plate is fixedly connected to the driving end of the telescopic rod. A pull rope is fixedly connected to the lower surface of the push plate. The end of the pull rope away from the push plate is fixedly connected to the side of the counterweight block. The combination design of the sealing cover and the feed port facilitates quick addition of medicine. The anti-detachment rope structure prevents the sealing cover from being lost, ensuring smooth operation. The air pump and the one-way valve work together to realize pneumatically driven liquid medicine delivery, avoiding the complex maintenance of traditional mechanical pumps, reducing equipment failure rate, and extending service life. At the same time, the one-way flow design prevents liquid medicine backflow and ensures operational safety.

[0013] Preferably, a guide ring is fixedly connected to the inner wall of the mounting block, and one end of the pull rope passes through the guide ring. The inner wall of the guide ring is rounded to effectively reduce the wear of the pull rope. When it is necessary to adjust the spray angle of the nozzle, the control rod drives the push plate to move upward, pulling the pull rope connected to the counterweight block. Then the pull rope tightens, thereby driving the counterweight block and the connecting block to rotate, and then driving the support tube to rotate around the collar, thereby changing the tilt angle of the nozzle. When the telescopic rod extends, the nozzle can tilt upward to spray the upper part of the fruit tree canopy. When the telescopic rod retracts, the nozzle returns to a vertical downward state, which is convenient for spraying the ground area and meets the spraying needs of plants of different heights in the orchard.

[0014] Preferably, a control device is provided on the upper surface of the medicine storage tank. The control device includes a one-way valve, which is connected to the upper surface of the medicine storage tank. An air supply pipe is fixedly connected to the input end of the one-way valve, and an air pump is fixedly connected to the input end of the one-way valve. An air inlet pipe is fixedly connected to the input end of the air pump. The air pressure driven medicine delivery system can accurately control the amount of medicine sprayed by adjusting the power of the air pump and the working time, adapting to the differentiated medicine needs of different orchard areas and fruit tree growth stages, reducing medicine waste. Multiple equally spaced nozzles achieve large-area basic coverage. With the initial downward design of the nozzles, it ensures uniform spraying of the middle and lower parts of the fruit trees and weeds on the ground, improving spraying efficiency.

[0015] Preferably, a positioning seat is fixedly connected to the upper surface of the storage tank, and the air pump is installed in the positioning seat to ensure stable operation of the air pump. When spraying pesticides in the orchard, the air pump controls the air intake pipe to draw in air, and delivers the gas into the storage tank through the air supply pipe and one-way valve. The one-way valve ensures that the gas can only flow into the storage tank in one direction. As the air pressure inside the tank increases, the pesticide solution is squeezed through the conduit to the nozzle under the action of the air pressure difference. By adjusting the power or working time of the air pump, the air pressure inside the storage tank can be controlled, thereby precisely adjusting the delivery flow rate of the pesticide solution and realizing flexible control of the spraying amount to adapt to the different dosages of pesticides for different orchards and fruit trees at different growth stages.

[0016] Preferably, two symmetrically arranged balance blocks are fixedly connected to the upper surface of the medicine storage box. The two balance blocks are located on both sides of the sealing cover. The balance blocks effectively ensure that the machine body is in a stable state and ensure that the equipment can carry out the spraying operation.

[0017] In summary, the technical effects and advantages of this utility model are as follows:

[0018] 1. In this utility model, by combining the counterweight block with the telescopic rod adjustment device, the nozzle can maintain a stable vertical downward spraying state, and the nozzle angle can be flexibly adjusted by driving the push plate through the telescopic rod. When tilted upward, it can cover the upper part of the tree canopy, and when retracted, it returns to vertical spraying of the ground, meeting the needs of precise spraying of fruit trees at all heights and in all areas, and solving the problem that traditional fixed nozzles are difficult to cover the top of the tree canopy.

[0019] 2. In this utility model, the pneumatically driven liquid delivery system can precisely control the amount of pesticide sprayed by adjusting the power of the air pump and the working time, adapting to the differentiated pesticide application needs of different orchard areas and fruit tree growth stages, reducing pesticide waste. Multiple equally spaced nozzles achieve large-area basic coverage, and the initial downward design of the nozzles ensures uniform spraying of the middle and lower parts of the fruit trees and weeds on the ground, improving spraying efficiency.

[0020] 3. In this utility model, a combination design of a sealing cap and a feed inlet is adopted to facilitate the rapid addition of medicine. The anti-detachment rope structure prevents the sealing cap from being lost, ensuring smooth operation. The air pump and one-way valve work together to realize pneumatically driven medicine delivery, avoiding the complex maintenance of traditional mechanical pumps, reducing equipment failure rate, and extending service life. At the same time, the one-way flow design prevents medicine backflow and ensures operational safety. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a drone-based orchard spraying device according to the present invention;

[0022] Figure 2 This is a bottom view of the structure of a drone-based orchard spraying device according to the present invention;

[0023] Figure 3 This utility model relates to a drone-based orchard spraying device. Figure 2 A schematic diagram of the structure at point A;

[0024] Figure 4 This is a side view of the orchard spraying device of the present invention.

[0025] Figure 5 This is a partial exploded structural diagram of the spraying device of the orchard spraying device of the present invention;

[0026] Figure 6 This utility model relates to a drone-based orchard spraying device. Figure 5 A schematic diagram of the structure at point B;

[0027] Figure 7 This is a schematic diagram of the structure of the sealing cover of the unmanned aerial vehicle (UAV) orchard spraying device of this utility model when it is opened;

[0028] Figure 8 This utility model relates to a drone-based orchard spraying device. Figure 7 A schematic diagram of the structure at point C.

[0029] In the diagram: 1. Machine body; 2. Support rod; 3. Positioning frame; 4. Motor; 5. Fan blade; 6. Camera; 7. Spraying mechanism; 71. Medicine storage tank; 72. Guide tube; 73. Support pipe; 74. Nozzle; 75. Positioning block; 76. Collar; 77. Stop block; 78. Connecting block; 79. Counterweight block; 710. Feed inlet; 711. Sealing cover; 712. Anti-detachment rope; 8. Adjustment device; 81. Mounting block; 82. Telescopic rod; 83. Push plate; 84. Guide ring; 85. Pull rope; 9. Control device; 91. One-way valve; 92. Air supply pipe; 93. Positioning seat; 94. Air pump; 95. Air inlet pipe; 96. Balance block. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] refer to Figures 1-8 The illustrated unmanned aerial vehicle (UAV) orchard spraying device includes a body 1. A spraying mechanism 7 is provided on the lower surface of the body 1. The spraying mechanism 7 includes a pesticide storage tank 71, which is fixedly connected to the lower surface of the body 1. Positioning blocks 75 are fixedly connected to both sides of the pesticide storage tank 71. A collar 76 is fixedly connected to the end of the positioning block 75 away from the pesticide storage tank 71. A support tube 73 is rotatably connected to the inner wall of the collar 76. A nozzle 74 is fixedly connected to the lower surface of the support tube 73. A conduit 72 is fixedly connected to the upper surface of the support tube 73. The end of the conduit 72 away from the support tube 73 is connected to the pesticide storage tank 71. Both ends of the support tube 73 are fixedly connected to a stop block 77. A connecting block 78 is fixedly connected to the lower surface of the stop block 77. A counterweight block 79 is fixedly connected to the lower end of the connecting block 78. By combining the counterweight block 79 with the telescopic rod 82 adjustment device 8, the nozzle 74 can maintain a stable vertical downward spraying state. It can also drive the push plate 83 through the telescopic rod 82 to flexibly adjust the angle of the nozzle 74. When tilted upward, it can cover the upper part of the tree canopy. When retracted, it returns to vertical spraying of the ground, meeting the needs of precise spraying of fruit trees at all heights and in all areas, and solving the problem that traditional fixed nozzles 74 are difficult to cover the top of the tree canopy.

[0032] The machine body 1 has a support rod 2 fixedly connected to its surface. A positioning frame 3 is fixedly connected to the end of the support rod 2 away from the machine body 1. A motor 4 is installed inside the positioning frame 3. A fan blade 5 is fixedly connected to the drive end of the motor 4. A camera 6 is installed on one side of the machine body 1. The camera 6 enables real-time monitoring of orchard operations. Operators can remotely observe the spraying effect, the growth status of fruit trees, and the operating status of the equipment, and adjust the drone's flight path and spraying parameters in a timely manner to avoid missed spraying or over-spraying. The airflow generated by the fan blade 5 assists in the atomization of the pesticide liquid, improves the penetration and adhesion of the pesticide liquid between branches and leaves, and enhances the efficacy of the pesticide.

[0033] The upper surface of the machine body 1 is fixedly connected to a feed inlet 710, and a sealing cap 711 is threaded onto the feed inlet 710. The feed inlet 710 facilitates the addition of sprayed medicine, and the sealing cap 711 seals the feed inlet 710 after the medicine is added.

[0034] Among them, an anti-detachment rope 712 is fixedly connected to the upper surface of the body 1. The end of the anti-detachment rope 712 away from the body 1 is connected to the sealing cover 711 to prevent the sealing cover 711 from falling off.

[0035] The device includes multiple nozzles 74 arranged at equal intervals to achieve basic coverage over a large area. During pesticide spraying, the nozzles 74 are kept in a naturally drooping state by counterweights 79, ensuring that the nozzles 74 always spray pesticide downwards while the drone is flying normally. This achieves basic coverage of the lower and middle leaves of the fruit trees, fruits, and ground weeds. The multiple equally spaced nozzles 74 can expand the coverage area of ​​a single spray and improve spraying efficiency.

[0036] The medicine storage tank 71 is equipped with an adjustment device 8 on the side near the positioning block 75. The adjustment device 8 includes a mounting block 81, which is fixedly connected to the side of the medicine storage tank 71 near the positioning block 75. A telescopic rod 82 is fixedly connected to the inner wall of the mounting block 81. A push plate 83 is fixedly connected to the drive end of the telescopic rod 82. A pull rope 85 is fixedly connected to the lower surface of the push plate 83. The end of the pull rope 85 away from the push plate 83 is fixedly connected to the side of the counterweight block 79. The combination design of the sealing cover 711 and the feed port 710 facilitates the rapid addition of medicine. The anti-detachment rope 712 structure prevents the sealing cover 711 from being lost, ensuring smooth operation. The air pump 94 and the one-way valve 91 work together to realize pneumatically driven liquid medicine delivery, avoiding the complex maintenance of traditional mechanical pumps, reducing equipment failure rate, and extending service life. At the same time, the one-way flow design prevents liquid medicine backflow and ensures operational safety.

[0037] The inner wall of the mounting block 81 is fixedly connected to a guide ring 84. One end of the pull rope 85 passes through the guide ring 84. The inner wall of the guide ring is rounded to effectively reduce the wear of the pull rope 85. When it is necessary to adjust the spraying angle of the nozzle 74, the control rod drives the push plate 83 to move upward, pulling the pull rope 85 connected to the counterweight block 79. Then the pull rope 85 is tightened, which drives the counterweight block 79 and the connecting block 78 to rotate. Subsequently, it drives the support tube 73 to rotate around the collar 76, thereby changing the tilt angle of the nozzle 74. When the telescopic rod 82 is extended, the nozzle 74 can tilt upward to spray the upper part of the fruit tree canopy. When the telescopic rod 82 is retracted, the nozzle 74 returns to a vertical downward state, which is convenient for spraying the ground area and meets the spraying needs of plants of different heights in the orchard.

[0038] The upper surface of the medicine storage tank 71 is equipped with a control device 9, which includes a one-way valve 91 connected to the upper surface of the medicine storage tank 71. The input end of the one-way valve 91 is fixedly connected to an air supply pipe 92, and the input end of the one-way valve 91 is fixedly connected to an air pump 94. The input end of the air pump 94 is fixedly connected to an air inlet pipe 95. The air pressure driven liquid delivery system can precisely control the amount of spraying by adjusting the power and working time of the air pump 94, adapting to the differentiated pesticide needs of different orchard areas and fruit tree growth stages, reducing pesticide waste. Multiple equally spaced nozzles 74 achieve large-area basic coverage. Combined with the initial downward design of the nozzles 74, it ensures uniform spraying of the middle and lower parts of the fruit trees and weeds on the ground, improving spraying efficiency.

[0039] The upper surface of the storage tank 71 is fixedly connected to a positioning seat 93, and the air pump 94 is installed in the positioning seat 93 to ensure stable operation of the air pump 94. When spraying pesticides in the orchard, the air pump 94 controls the air intake pipe 95 to draw in air, and delivers the gas into the storage tank 71 through the air supply pipe 92 and the one-way valve 91. The one-way valve 91 ensures that the gas can only flow into the storage tank 71 in one direction. As the air pressure inside the tank increases, the pesticide liquid is squeezed through the conduit 72 to the nozzle 74 under the action of the air pressure difference. By adjusting the power or working time of the air pump 94, the air pressure inside the storage tank 71 can be controlled, thereby precisely adjusting the delivery flow rate of the pesticide liquid and realizing flexible control of the spraying amount to adapt to the different dosages of pesticides for different orchards and fruit trees at different growth stages.

[0040] Among them, two symmetrically arranged balance blocks 96 are fixedly connected to the upper surface of the medicine storage box 71. The two balance blocks 96 are located on both sides of the sealing cover 711. The balance blocks 96 effectively ensure that the machine body 1 is in a stable state and ensure that the equipment can carry out the medicine spraying operation.

[0041] The working principle of this invention is as follows: Before spraying the orchard, unscrew the sealing cap 711, add the pesticide to be sprayed through the feed inlet 710, and then screw the sealing cap 711 back on.

[0042] Subsequently, the motor 4, controlled by the body 1, drives the fan blades 5 to rotate, generating airflow, which in turn propels the equipment to take off. The camera 6 is used to capture real-time images of the orchard, allowing operators to remotely monitor the spraying process and adjust the drone's flight path and spraying parameters.

[0043] Air is drawn in through the air intake pipe 95 by the air pump 94, and then delivered to the pesticide storage tank 71 via the air supply pipe 92 and the one-way valve 91. The one-way valve 91 ensures that the gas can only flow into the pesticide storage tank 71 in one direction. As the air pressure inside the tank increases, the pesticide solution is squeezed through the conduit 72 and flows to the nozzle 74 under the action of the pressure difference. By adjusting the power or working time of the air pump 94, the air pressure inside the pesticide storage tank 71 can be controlled, thereby precisely adjusting the flow rate of the pesticide solution and achieving flexible control of the spraying amount to adapt to the different dosages required for different orchards and fruit trees at different growth stages.

[0044] During pesticide spraying, the nozzle 74 is kept in a naturally drooping state by the counterweight 79, ensuring that the nozzle 74 always sprays pesticide downwards while the drone is flying normally. This achieves basic coverage of the lower and middle leaves of the fruit trees, fruits, and ground weeds. The multiple nozzles 74 arranged at equal intervals can expand the coverage area of ​​a single spray and improve spraying efficiency.

[0045] When the spraying angle of the nozzle 74 needs to be adjusted, the control lever drives the push plate 83 to move upward, pulling the rope 85 connected to the counterweight 79. The rope 85 then tightens, causing the counterweight 79 and the connecting block 78 to rotate. This, in turn, causes the support tube 73 to rotate around the collar 76, thereby changing the tilt angle of the nozzle 74. When the telescopic rod 82 extends, the nozzle 74 can tilt upward to spray the upper part of the fruit tree canopy. When the telescopic rod 82 retracts, the nozzle 74 returns to a vertical downward state, facilitating spraying of the ground area and meeting the spraying needs of plants of different heights in the orchard.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drone-based orchard spraying device, comprising a body (1), characterized in that: A spraying mechanism (7) is provided on the lower surface of the body (1). The spraying mechanism (7) includes a medicine storage tank (71). The medicine storage tank (71) is fixedly connected to the lower surface of the body (1). Positioning blocks (75) are fixedly connected to both sides of the medicine storage tank (71). A collar (76) is fixedly connected to the end of the positioning block (75) away from the medicine storage tank (71). A support tube (73) is rotatably connected to the inner wall of the collar (76). A nozzle (74) is fixedly connected to the lower surface of the tube (73), and a guide tube (72) is fixedly connected to the upper surface of the support tube (73). The end of the guide tube (72) away from the support tube (73) is connected to the medicine storage tank (71). Both ends of the support tube (73) are fixedly connected to a stop block (77). A connecting block (78) is fixedly connected to the lower surface of the stop block (77), and a counterweight block (79) is fixedly connected to the lower end of the connecting block (78).

2. The orchard spraying device for unmanned aerial vehicles according to claim 1, characterized in that: A support rod (2) is fixedly connected to the surface of the body (1). A positioning frame (3) is fixedly connected to the end of the support rod (2) away from the body (1). A motor (4) is installed inside the positioning frame (3). A fan blade (5) is fixedly connected to the drive end of the motor (4). A camera (6) is installed on one side of the body (1).

3. The orchard spraying device for unmanned aerial vehicles according to claim 1, characterized in that: The upper surface of the machine body (1) is fixedly connected to a feed inlet (710), and a sealing cap (711) is threaded onto the feed inlet (710).

4. The unmanned aerial vehicle (UAV) orchard spraying device according to claim 3, characterized in that: An anti-detachment rope (712) is fixedly connected to the upper surface of the body (1), and the end of the anti-detachment rope (712) away from the body (1) is connected to the sealing cover (711).

5. The orchard spraying device for unmanned aerial vehicles according to claim 1, characterized in that: The number of nozzles (74) is multiple, and the multiple nozzles (74) are arranged at equal intervals.

6. The orchard spraying device for unmanned aerial vehicles according to claim 1, characterized in that: An adjustment device (8) is provided on the side of the medicine storage box (71) near the positioning block (75). The adjustment device (8) includes a mounting block (81). The mounting block (81) is fixedly connected to the side of the medicine storage box (71) near the positioning block (75). A telescopic rod (82) is fixedly connected to the inner wall of the mounting block (81). A push plate (83) is fixedly connected to the driving end of the telescopic rod (82). A pull rope (85) is fixedly connected to the lower surface of the push plate (83). The end of the pull rope (85) away from the push plate (83) is fixedly connected to one side of the counterweight block (79).

7. The unmanned aerial vehicle (UAV) orchard spraying device according to claim 6, characterized in that: A guide ring (84) is fixedly connected to the inner wall of the mounting block (81), and one end of the pull rope (85) passes through the guide ring (84).

8. The unmanned aerial vehicle (UAV) orchard spraying device according to claim 1, characterized in that: The upper surface of the medicine storage box (71) is provided with a control device (9). The control device (9) includes a one-way valve (91). The one-way valve (91) is connected to the upper surface of the medicine storage box (71). An air supply pipe (92) is fixedly connected to the input end of the one-way valve (91). An air pump (94) is fixedly connected to the input end of the one-way valve (91). An air inlet pipe (95) is fixedly connected to the input end of the air pump (94).

9. A drone-based orchard spraying device according to claim 8, characterized in that: The upper surface of the medicine storage box (71) is fixedly connected to a positioning seat (93), and the air pump (94) is installed in the positioning seat (93).

10. The unmanned aerial vehicle (UAV) orchard spraying device according to claim 1, characterized in that: The upper surface of the medicine storage box (71) is fixedly connected to two symmetrically arranged balance blocks (96), which are located on both sides of the sealing cover (711).

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