Drip-proof unmanned aerial vehicle spraying device

Abstract

The invention discloses a drip-proof unmanned aerial vehicle spraying device, and relates to the technical field of unmanned aerial vehicle pesticide spraying, the device comprises a fixed cylinder, a conical frame and a mounting pipe connected to the lower end of the fixed cylinder, and an atomizing nozzle mounted at the tail end of the mounting pipe, the fixed cylinder is connected with a filter box and a liquid conveying pipe through a connecting pipe, and an emptying mechanism is arranged in the device; when medicine spraying is finished, medicine in the fixing cylinder and the atomizing spray head can be completely discharged, dripping leakage is prevented, the filtering mechanism adopts the combination of a first filtering net and a second filtering net, solid impurities in the medicine can be effectively filtered out and collected in a collecting frame, the spray head is prevented from being blocked, and the protection mechanism comprises a movable and rotatable protection plate. The problems that after an unmanned aerial vehicle sprays mist, pesticide residues drip, the sprayer is prone to being blocked, and the sprayer is exposed and damaged are effectively solved, the environment friendliness and continuity of spraying operation are improved, the service life of the device is prolonged, and the device is suitable for large-scale agricultural plant protection operation.

Description

Technical Field

[0001] This invention relates to the field of drone spraying technology, specifically a drip-proof drone spraying device. Background Technology

[0002] Drone spraying technology plays an increasingly important role in modern agricultural plant protection, offering significant advantages such as high operational efficiency, adaptability to complex terrain, and reduced human contact with pesticides. It has been widely applied in large-scale crop pest and disease control, nutrient solution spraying, and other operational scenarios. However, in practical applications, existing drone spraying devices still face several technical challenges that urgently need to be addressed: Drug residue and leakage issues: After spraying operations, some pesticide residue often remains in pipelines and nozzles. Due to gravity or inertia, leakage can easily occur during drone transfer or parking. This not only wastes pesticide and increases operating costs, but may also cause soil and water pollution or harm to non-target organisms due to pesticide dripping into non-target areas, affecting the environmental friendliness and safety of the operation.

[0003] High risk of nozzle clogging: Agricultural pesticide solutions often contain undissolved particles, sediments, or impurities. If these enter the spraying system directly, they can easily accumulate at the nozzles, causing blockage of the atomizing orifices. Nozzle clogging affects atomization and spray uniformity, reduces the effectiveness of pest control, and may even cause spraying interruptions, requiring frequent shutdowns for cleaning, severely impacting operational continuity and efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a drip-proof drone spraying device to solve the problem of pesticide residues from existing agricultural drones dripping into non-target areas.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A drip-proof drone spraying device includes a fixed cylinder, which is vertically fixed to the rotor arm of a drone via a bracket. A conical frame is fixedly connected to the lower end of the fixed cylinder. An installation tube is fixedly connected to the center of the end of the conical frame away from the fixed cylinder. An atomizing nozzle is fixedly installed at the end of the installation tube away from the conical frame. A connecting tube is fixedly connected to the side wall of the fixed cylinder. A filter box is fixedly connected to the end of the connecting tube away from the fixed cylinder. An infusion tube is fixedly connected to the end of the filter box away from the connecting tube. The end of the infusion tube away from the filter box is connected to the output end of a drug delivery tube on the drone. The fixed cylinder is equipped with a venting mechanism to completely discharge the drug inside the fixed cylinder and the atomizing nozzle when spraying is finished. The filter box is equipped with a filtration mechanism for filtering the drug. The side wall of the fixed cylinder is equipped with a protective mechanism for protecting the atomizing nozzle when not in use.

[0006] As a further aspect of the present invention: the venting mechanism includes a limiting cylinder, which is fixedly connected to the upper end of a fixed cylinder. A first piston block is slidably connected to the inner wall of the fixed cylinder. A third piston block, which works in conjunction with a conical frame, is fixedly connected to the lower end of the first piston block. A second piston block, which works in conjunction with an installation tube, is fixedly connected to the center of the lower end of the third piston block. When the upper end of the first piston block moves to the top of the fixed cylinder, the output end of the connecting tube is positioned below the first piston block. When the second piston block is inserted into the installation tube and the third piston block is pressed against the inner wall of the conical frame, the upper end of the side wall of the first piston block still blocks the output end of the connecting tube. After the lower end of the side wall of the first piston block blocks the output end of the connecting tube, the first piston block still needs to move a certain distance to make the third piston block press against the inner wall of the conical frame. The purpose is to vent the medicine inside the fixed cylinder, conical frame, installation tube, and atomizing nozzle after the output end of the connecting tube is blocked. A driving component for moving the first piston block is provided on the side wall of the fixed cylinder.

[0007] As a further embodiment of the present invention: the driving assembly includes a slide rod, which is fixedly connected to the upper end of the first piston block. The upper end of the slide rod passes through the limiting cylinder and is fixedly connected to a fixing plate. The side wall of the slide rod is slidably and sealingly connected to the inner wall of the limiting cylinder. A second electric telescopic rod is fixedly connected to the side wall of the fixing cylinder, and the output end of the second electric telescopic rod is fixedly connected to the side wall of the fixing plate.

[0008] As a further embodiment of the present invention: the filtration mechanism includes a collection frame, which is fixedly connected to the lower end of the filter box. A first opening and a second opening are provided on the side wall of the filter box inside the collection frame. The second opening is located on the side near the connecting pipe, and the first opening is located on the side near the infusion pipe. A second filter screen is fixedly connected to the upper end of the side wall of the second opening near the connecting pipe. The end of the second filter screen away from the second opening is inclined towards the infusion pipe. The side wall of the second filter screen is fixedly connected to the inner wall of the filter box. A first filter screen is fixedly connected to the inner wall of the first opening. A slag discharge pipe is fixedly connected to the side wall of the collection frame away from the filter box. A sealing cap is fixedly connected to the side wall of the slag discharge pipe by threads.

[0009] As a further embodiment of the present invention: a second guide plate is fixedly connected to the lower end of the side wall near the infusion tube of the second opening to prevent solid impurities from flowing back into the second opening.

[0010] As a further embodiment of the present invention: a first guide plate is fixedly connected to the upper end of the side wall near the infusion tube of the first opening for guiding the medicine output from the first opening to the second filter screen.

[0011] As a further embodiment of the present invention: the protective mechanism includes a first electric telescopic rod, which is fixedly connected to the side wall of the fixed cylinder. A motor is fixedly connected to the output end of the first electric telescopic rod, and a connecting plate is fixedly connected to the output end of the motor. A protective plate for sealing and protecting the atomizing nozzle is fixedly connected to the side wall of the connecting plate.

[0012] As a further embodiment of the present invention: a sealing rubber gasket is fixedly connected to the side wall of the protective plate to facilitate the protective plate to fit tightly against the atomizing nozzle.

[0013] As a further embodiment of the present invention: the bottom of the collection frame is provided with an inclined guide surface, and the slag discharge pipe is set at the lowest point of the guide surface, so that solid impurities are concentrated and discharged under the action of gravity.

[0014] As a further aspect of the present invention, the side walls of both the filter box and the collection frame are provided with transparent observation windows, which facilitates real-time observation of the filter screen blockage and timely cleaning and maintenance.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention, by setting up an emptying mechanism, can completely drain the residual liquid in the fixed cylinder, conical frame, mounting pipe and atomizing nozzle after the spraying operation is completed, avoiding environmental pollution and drug waste caused by residual liquid dripping from traditional spraying devices.

[0016] The filtration system employs a multi-stage filtration design, which can effectively remove solid impurities from the pesticide solution, prevent nozzle clogging, and ensure uniform and continuous spraying, thereby improving the effectiveness and efficiency of plant protection operations.

[0017] The protective mechanism can seal and protect the atomizing nozzle during non-operational periods, preventing foreign objects from entering or the nozzle from being damaged, extending the service life of the device, and reducing maintenance frequency and costs.

[0018] The overall device has a reasonable layout and good compatibility with drones. Each mechanism is electrically controlled to achieve automated operation, reducing manual intervention and making it suitable for large-scale, high-frequency agricultural plant protection operations. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the venting mechanism in this invention.

[0021] Figure 3 This is a schematic diagram of the filtration mechanism in this invention.

[0022] Figure 4 This is a schematic diagram of the protective mechanism in this invention.

[0023] The components are as follows: 1. Fixed cylinder; 2. Connecting pipe; 3. Filter box; 4. Infusion pipe; 5. Collection frame; 6. Sealing cap; 7. Conical frame; 8. Atomizing nozzle; 9. Protective plate; 10. Connecting plate; 11. Motor; 12. Mounting pipe; 13. First electric telescopic rod; 14. Second electric telescopic rod; 15. Fixed plate; 16. Limiting cylinder; 17. Sliding rod; 18. First piston block; 19. Second piston block; 20. Third piston block; 21. Slag discharge pipe; 22. First filter screen; 23. First guide plate; 24. First opening; 25. Second filter screen; 26. Second opening; 27. Second guide plate. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figures 1-4 In this embodiment of the invention, a drip-proof drone spraying device includes a fixed cylinder 1, which is vertically fixed to the rotor arm of the drone via a bracket. A conical frame 7 is fixedly connected to the lower end of the fixed cylinder 1. An installation pipe 12 is fixedly connected to the center of the end of the conical frame 7 away from the fixed cylinder 1. An atomizing nozzle 8 is fixedly installed at the end of the installation pipe 12 away from the conical frame 7. A connecting pipe 2 is fixedly connected to the side wall of the fixed cylinder 1. A filter box 3 is fixedly connected to the end of the connecting pipe 2 away from the fixed cylinder 1. An infusion pipe 4 is fixedly connected to the end of the filter box 3 away from the connecting pipe 2. The end of the infusion pipe 4 away from the filter box 3 is connected to the output end of the drug delivery pipe on the drone. The inside of the fixed cylinder 1 is provided with a venting mechanism to completely discharge the drug inside the fixed cylinder 1 and the atomizing nozzle 8 when the spraying is finished. The inside of the filter box 3 is provided with a filtering mechanism for filtering the drug. The side wall of the fixed cylinder 1 is provided with a protective mechanism for protecting the atomizing nozzle 8 when not in use.

[0026] The venting mechanism includes a limiting cylinder 16, which is fixedly connected to the upper end of a fixed cylinder 1. A first piston block 18 is slidably connected to the inner wall of the fixed cylinder 1. A third piston block 20, which works in conjunction with a conical frame 7, is fixedly connected to the lower end of the first piston block 18. A second piston block 19, which works in conjunction with an installation tube 12, is fixedly connected to the center of the lower end of the third piston block 20. When the upper end of the first piston block 18 moves to the top of the fixed cylinder 1, the output end of the connecting tube 2 is positioned below the first piston block 18, and the second piston block 19 is inserted into the installation tube 12. When the third piston block 20 is pressed against the inner wall of the conical frame 7, the upper end of the side wall of the first piston block 18 still blocks the output end of the connecting pipe 2. After the lower end of the side wall of the first piston block 18 blocks the output end of the connecting pipe 2, the first piston block 18 still needs to move a certain distance to make the third piston block 20 press against the inner wall of the conical frame 7. The purpose is to discharge the medicine inside the fixed cylinder 1, the conical frame 7, the mounting pipe 12, and the atomizing nozzle 8 after the output end of the connecting pipe 2 is blocked. The side wall of the fixed cylinder 1 is provided with a drive assembly for moving the first piston block 18.

[0027] The drive assembly includes a slide rod 17, which is fixedly connected to the upper end of the first piston block 18. The upper end of the slide rod 17 passes through the limiting cylinder 16 and is fixedly connected to the fixing plate 15. The side wall of the slide rod 17 is slidably and sealingly connected to the inner wall of the limiting cylinder 16. A second electric telescopic rod 14 is fixedly connected to the side wall of the fixing cylinder 1, and the output end of the second electric telescopic rod 14 is fixedly connected to the side wall of the fixing plate 15.

[0028] Before spraying, the second electric telescopic rod 14 is extended. The output end of the second electric telescopic rod 14 drives the fixed plate 15 and the slide rod 17 to move. The slide rod 17 drives the first piston block 18, the third piston block 20 and the second piston block 19 to move, so that the lower end of the first piston block 18 moves above the output end of the connecting pipe 2.

[0029] After spraying is completed, the second electric telescopic rod 14 is retracted. The output end of the second electric telescopic rod 14 drives the fixed plate 15 and the slide rod 17 to move. The slide rod 17 drives the first piston block 18, the third piston block 20, and the second piston block 19 to move, so that the side wall of the first piston block 18 seals the output end of the connecting pipe 2. After the lower end of the side wall of the first piston block 18 seals the output end of the connecting pipe 2, the first piston block 18 continues to move until the second piston block 19 is inserted into the installation pipe 12 and the third piston block 20 is close to the inner wall of the conical frame 7. At the same time, under the action of pressure, the medicine inside the fixed cylinder 1, the conical frame 7, the installation pipe 12, and the atomizing nozzle 8 is discharged.

[0030] The filtration mechanism includes a collection frame 5, which is fixedly connected to the lower end of the filter box 3. A first opening 24 and a second opening 26 are provided on the side wall of the filter box 3 inside the collection frame 5. The second opening 26 is located near the connecting pipe 2, and the first opening 24 is located near the infusion pipe 4. A second filter screen 25 is fixedly connected to the upper end of the side wall of the second opening 26 near the connecting pipe 2. The end of the second filter screen 25 away from the second opening 26 is inclined towards the infusion pipe 4. The side wall of the second filter screen 25 is fixed to the inner wall of the filter box 3. The first opening 24 is connected to a first filter screen 22. The collection frame 5 is connected to a slag discharge pipe 21 on the side wall away from the filter box 3. The side wall of the slag discharge pipe 21 is connected to a sealing cap 6 by threads. The lower end of the side wall of the second opening 26 near the infusion tube 4 is connected to a second guide plate 27 to prevent solid impurities from flowing back into the second opening 26. The upper end of the side wall of the first opening 24 near the infusion tube 4 is connected to a first guide plate 23 to guide the medicine output from the first opening 24 to the second filter screen 25.

[0031] During use, the infusion tube 4 delivers the medicine to the second filter screen 25 inside the filter box 3. The medicine is filtered through the second filter screen 25. Since the second filter screen 25 is inclined, the medicine will also flush solid impurities on the second filter screen 25 into the collection frame 5 through the second opening 26. Then, after being filtered through the first filter screen 22, the medicine re-enters the filter box 3 and continues to be delivered through the second filter screen 25, thereby collecting solid impurities inside the collection frame 5. When cleaning the collection frame 5, the sealing cover 6 is opened to allow the solid impurities inside the collection frame 5 to be discharged through the slag discharge pipe 21.

[0032] The protective mechanism includes a first electric telescopic rod 13, which is fixedly connected to the side wall of the fixed cylinder 1. A motor 11 is fixedly connected to the output end of the first electric telescopic rod 13, and a connecting plate 10 is fixedly connected to the output end of the motor 11. A protective plate 9 for sealing and protecting the atomizing nozzle 8 is fixedly connected to the side wall of the connecting plate 10.

[0033] After the spraying is completed, the first electric telescopic rod 13 is extended. The output end of the first electric telescopic rod 13 drives the motor 11, the connecting plate 10, and the protective plate 9 to move, so that the upper end of the protective plate 9 is flush with the output end of the atomizing nozzle 8. Then, the motor 11 is started, and the output end of the motor 11 drives the connecting plate 10 and the protective plate 9 to rotate, so that the protective plate 9 blocks the output end of the atomizing nozzle 8.

[0034] The working principle of a drip-proof drone spray device: After spraying is completed, the second electric telescopic rod 14 is retracted. The output end of the second electric telescopic rod 14 drives the fixed plate 15 and the slide rod 17 to move. The slide rod 17 drives the first piston block 18, the third piston block 20, and the second piston block 19 to move, so that the side wall of the first piston block 18 seals the output end of the connecting pipe 2. After the lower end of the side wall of the first piston block 18 seals the output end of the connecting pipe 2, the first piston block 18 continues to move until the second piston block 19 is inserted into the installation pipe 12 and the third piston block 20 is close to the inner wall of the conical frame 7. At the same time, under the action of pressure, the medicine inside the fixed cylinder 1, the conical frame 7, the installation pipe 12, and the atomizing nozzle 8 is discharged.

[0035] Then, the first electric telescopic rod 13 is extended. The output end of the first electric telescopic rod 13 drives the motor 11, the connecting plate 10, and the protective plate 9 to move, so that the upper end of the protective plate 9 is flush with the output end of the atomizing nozzle 8. Then, the motor 11 is started. The output end of the motor 11 drives the connecting plate 10 and the protective plate 9 to rotate, so that the protective plate 9 blocks the output end of the atomizing nozzle 8.

[0036] During spraying, the reverse operation is performed. Simultaneously, during use, the infusion tube 4 delivers the pesticide solution to the second filter screen 25 inside the filter box 3. The solution is filtered through the second filter screen 25. Because the second filter screen 25 is inclined, the pesticide solution also flushes solid impurities on the second filter screen 25 through the second opening 26 into the collection frame 5. Then, after being filtered through the first filter screen 22, the solution re-enters the filter box 3 and continues to be delivered through the second filter screen 25, thus achieving the collection of solid impurities inside the collection frame 5. When cleaning the collection frame 5, the sealing cover 6 is opened, allowing the solid impurities inside the collection frame 5 to be discharged through the slag discharge pipe 21.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A leak-proof drone spraying device, comprising a fixed cylinder (1), the fixed cylinder (1) being vertically fixedly connected to the rotor arm of a drone via a bracket, a conical frame (7) being fixedly connected to the lower end of the fixed cylinder (1), an installation pipe (12) being fixedly connected to the center of the end of the conical frame (7) away from the fixed cylinder (1), an atomizing nozzle (8) being fixedly installed at the end of the installation pipe (12) away from the conical frame (7), a connecting pipe (2) being fixedly connected to the side wall of the fixed cylinder (1), a filter box (3) being fixedly connected to the end of the connecting pipe (2) away from the fixed cylinder (1), an infusion pipe (4) being fixedly connected to the end of the filter box (3) away from the connecting pipe (2), and the end of the infusion pipe (4) away from the filter box (3) being connected to the output end of a drug delivery pipe on the drone, characterized in that, The fixed cylinder (1) is equipped with an emptying mechanism that completely discharges the drug inside the fixed cylinder (1) and the atomizing nozzle (8) when the spraying ends. The filter box (3) is equipped with a filtering mechanism for filtering the drug. The side wall of the fixed cylinder (1) is equipped with a protective mechanism for protecting the atomizing nozzle (8) when not in use.

2. The anti-drip drone spraying device according to claim 1, characterized in that, The venting mechanism includes a limiting cylinder (16), which is fixedly connected to the upper end of the fixed cylinder (1). A first piston block (18) is slidably connected to the inner wall of the fixed cylinder (1). A third piston block (20) that works with the conical frame (7) is fixedly connected to the lower end of the first piston block (18). A second piston block (19) that works with the mounting pipe (12) is fixedly connected to the center of the lower end of the third piston block (20). When the upper end of the first piston block (18) moves to the top of the fixed cylinder (1), the output end of the connecting pipe (2) is set on the first piston block. Below (18), when the second piston block (19) is inserted into the installation tube (12) and the third piston block (20) is close to the inner wall of the conical frame (7), the upper end of the side wall of the first piston block (18) still blocks the output end of the connecting tube (2). After the lower end of the side wall of the first piston block (18) blocks the output end of the connecting tube (2), the first piston block (18) still needs to move a distance to make the third piston block (20) close to the inner wall of the conical frame (7). The side wall of the fixed cylinder (1) is provided with a drive assembly for moving the first piston block (18).

3. The anti-drip drone spraying device according to claim 2, characterized in that, The drive assembly includes a slide rod (17), which is fixedly connected to the upper end of the first piston block (18). The upper end of the slide rod (17) passes through the limiting cylinder (16) and is fixedly connected to a fixing plate (15). The side wall of the slide rod (17) is sealed and slidably connected to the inner wall of the limiting cylinder (16). A second electric telescopic rod (14) is fixedly connected to the side wall of the fixing cylinder (1), and the output end of the second electric telescopic rod (14) is fixedly connected to the side wall of the fixing plate (15).

4. The anti-drip drone spraying device according to claim 1, characterized in that, The filtration mechanism includes a collection frame (5), which is fixedly connected to the lower end of the filter box (3). The filter box (3) inside the collection frame (5) has a first opening (24) and a second opening (26) on its side wall. The second opening (26) is located on the side close to the connecting pipe (2), and the first opening (24) is located on the side close to the infusion pipe (4). The upper end of the side wall of the second opening (26) close to the connecting pipe (2) is fixedly connected to a second filter screen (25). The end of the second filter screen (25) away from the second opening (26) is inclined towards the infusion pipe (4). The side wall of the second filter screen (25) is fixedly connected to the inner wall of the filter box (3). The inner wall of the first opening (24) is fixedly connected to a first filter screen (22). The side wall of the collection frame (5) away from the filter box (3) is fixedly connected to a slag discharge pipe (21). The side wall of the slag discharge pipe (21) is fixedly connected to a sealing cap (6) by threads.

5. A drip-proof drone spraying device according to claim 4, characterized in that, The second opening (26) is fixedly connected to the lower end of the side wall near the infusion tube (4) with a second guide plate (27) to prevent solid impurities from flowing back into the second opening (26).

6. A drip-proof drone spraying device according to claim 4, characterized in that, The upper end of the side wall of the first opening (24) near the infusion tube (4) is fixedly connected to a first guide plate (23) for guiding the medicine output from the first opening (24) to the second filter screen (25).

7. The anti-drip drone spraying device according to claim 1, characterized in that, The protective mechanism includes a first electric telescopic rod (13), which is fixedly connected to the side wall of the fixed cylinder (1). The output end of the first electric telescopic rod (13) is fixedly connected to a motor (11), and the output end of the motor (11) is fixedly connected to a connecting plate (10). A protective plate (9) for sealing and protecting the atomizing nozzle (8) is fixedly connected to the side wall of the connecting plate (10).

8. A drip-proof drone spraying device according to claim 7, characterized in that, A sealing rubber gasket is fixedly connected to the side wall of the protective plate (9) to facilitate the protective plate (9) to fit tightly against the atomizing nozzle (8).

9. A drip-proof drone spraying device according to claim 4, characterized in that, The bottom of the collection box (5) is provided with an inclined guide surface, and the slag discharge pipe (21) is located at the lowest point of the guide surface.

10. A drip-proof drone spraying device according to claim 4, characterized in that, Both the filter box (3) and the collection box (5) have transparent observation windows on their side walls.

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