Air-assisted spraying device for agricultural drones

Abstract

This utility model belongs to the field of drone spraying technology, specifically a wind-driven spraying device for agricultural drones. It includes a pesticide tank, pump body, pipeline, filter, and nozzle. The pesticide tank has a top-heavy, bottom-light structure for easy emptying of the pesticide solution. The pump body is located at the bottom of the tank, and the filter is located between the tank and the pump body. The pump body is connected to the nozzle via the pipeline, which has a retainer for connecting the drone's arm. The nozzle is mounted at the front end of the retainer. The lower end of the nozzle has a motor-driven centrifugal fan blade that atomizes the pesticide solution. The centrifugal fan blade also has a ring structure to reduce pesticide adhesion and deliver the atomized pesticide droplets downwards. The pesticide tank has internal baffles to reduce internal pesticide fluctuations, resulting in smoother drone flight and turning. This spraying device can be installed as a complete assembly on a drone or disassembled separately for easy maintenance and cleaning.

Description

Technical Field

[0001] This utility model belongs to the field of drone spraying technology, specifically a wind-driven spraying device for agricultural drones. Background Technology

[0002] Drone-based plant protection operations have seen widespread application and rapid development in recent years due to their advantages such as high efficiency, strong terrain adaptability, low water consumption, low operating costs, and convenient relocation. Among these, the spraying system, as a core component of drone-based plant protection, directly impacts operational effectiveness. Currently, most components of existing spraying systems, except for the pesticide tank, are typically integrated into the drone's fuselage. This integrated structure makes disassembly, replacement, or maintenance cumbersome and inconvenient, affecting operational continuity and maintenance efficiency.

[0003] Therefore, it is necessary to provide a drone spraying system with a more reasonable structural design and greater ease of use. Summary of the Invention

[0004] Based on this, this solution provides a wind-driven spraying device for agricultural drones. It can be quickly assembled and fixed with the drone as a modular structural component, improving maintenance efficiency. The atomization of the pesticide is uniform, and it can be delivered downwards in conjunction with the drone's fan blades. The spraying direction can be adjusted.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] The plant protection drone uses a wind-driven spraying device, which includes a pesticide tank, a pump body, pipelines, a filter, and a nozzle. The pesticide tank has a structure that is larger at the top and smaller at the bottom to facilitate the emptying of the pesticide solution. The pump body is located at the bottom of the pesticide tank, and the filter is located between the pesticide tank and the pump body. The pump body is connected to the nozzle through the pipeline, which has a retainer for connecting the drone's arm. The nozzle is installed at the front end of the retainer. The lower end of the nozzle has a motor-driven centrifugal fan blade to atomize the pesticide solution. The centrifugal fan blade also has a ring structure around its periphery to reduce pesticide adhesion and deliver the atomized pesticide droplets downwards. The pesticide tank has a partition inside to reduce internal pesticide fluctuations and make the drone's flight and turning more stable.

[0007] Optionally, in one embodiment of the present invention, the annular structure is a conical structure, and the internal spiral blade structure of the annular structure is used to throw the liquid medicine on the surface downward.

[0008] Optionally, in one embodiment of the present invention, the medicine box has a T-shaped cross-section to facilitate stable placement on the drone frame.

[0009] Optionally, in one embodiment of the present invention, the fixture includes a pipe ring, a fixing plate, and a clamp structure. The pipe ring and the clamp structure are located on the upper and lower sides of the fixing plate, respectively. The bottom front end of the fixing plate is provided with a connecting part for connecting the nozzle.

[0010] Optionally, in one embodiment of the present invention, the nozzle includes a connecting rod, the upper end of the connecting rod is provided with a connector, and a centrifugal motor is provided inside the connecting rod for driving centrifugal fan blades.

[0011] Optionally, in one embodiment of the present invention, a conductive structure is provided on one side of the medicine box, the conductive structure is fitted into the side wall of the medicine box, and the conductive structure is provided with contacts for connecting the power supply of the drone.

[0012] Optionally, in one embodiment of the present invention, a limiting groove is provided on the medicine box at the position where it fits against the drone frame to reduce the shaking of the medicine box.

[0013] Optionally, in one embodiment of the present invention, a rotary joint is provided between the upper and lower parts of the connecting rod for adjusting the angle of the lower part of the nozzle.

[0014] Compared with the prior art, the wind-driven spraying device for agricultural drones provided by this utility model has the following characteristics:

[0015] The nozzle features a conical annular structure and centrifugal fan blades at the spraying end. Through their combined action, the pesticide solution is atomized. The rotating annular structure actively flings the pesticide solution that impacts the inner wall downwards, forming a downward-facing air curtain barrier. This reduces the drift of fine droplets, directing more towards the target crop and ensuring the accuracy and effectiveness of the spraying.

[0016] The nozzle is equipped with a rotating joint, which can pre-adjust the spray angle of the nozzle. When the drone is flying forward, the nozzle can be adjusted slightly forward to compensate for the droplets drifting backward due to the airflow generated during flight, ensuring that the liquid tends to spray vertically downward during flight.

[0017] The medicine tank features a design that is wider at the top and narrower at the bottom, with a conical shape at the bottom. This allows the liquid medicine to collect at the center, facilitating emptying and cleaning. An internal partition prevents the liquid medicine from sloshing around during drone acceleration, turning, or encountering turbulent airflow, ensuring the drone's flight stability and maneuverability.

[0018] The fixture is made of carbon fiber and features a clamp structure and pipe ring to secure the pipes. It also allows for tool-free assembly and disassembly of the fixture and the drone arm, making it quick and easy and improving the efficiency of outdoor operation and maintenance.

[0019] The medicine box has a conductive structure with contacts on one side, which matches the flexible conductive contacts on the drone frame. This allows for quick connection and immediate power-on upon placing the medicine box 1, eliminating the need for manual plugging and unplugging of wires. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front view schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0022] Figure 2 This is a schematic diagram of the medicine box structure of Embodiment 1 of this utility model;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the fixator in Embodiment 1 of this utility model;

[0024] Figure 4 This is a schematic diagram of the nozzle structure of Embodiment 1 of this utility model;

[0025] Reference numerals: medicine box 1, handle 101, lid 102, guiding structure 103, partition 104, filter 2, pump body 3, distributor 4, fixing plate 5, pipe ring 501, clamp structure 502, connection part 503, pipe 6, nozzle 7, connector 701, cap 702, centrifugal motor 703, centrifugal fan blade 704, ring structure 705, rotating joint 706. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0027] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. Example

[0028] Since most existing agricultural drones adopt an integrated design, if any structural component of the spraying system malfunctions, the drone needs to be disassembled, making maintenance cumbersome. Therefore, a spraying device with higher maintenance efficiency has been designed, and the specific solution is as follows:

[0029] like Figure 1-4 As shown, the air-assisted spraying device for agricultural drones includes a pesticide tank 1, a pump body 3, a pipeline 6, a filter 2, and a nozzle 7. The pesticide tank 1 has a structure that is larger at the top and smaller at the bottom to facilitate the emptying of pesticide liquid. The pump body 3 is located at the bottom of the pesticide tank 1, and the filter 2 is located between the pesticide tank 1 and the pump body 3. The pump body 3 is connected to the nozzle 7 through the pipeline 6. A retainer is provided on the pipeline for connecting the drone's arm. The nozzle 7 is installed at the front end of the retainer. The lower end of the nozzle 7 has a motor-driven centrifugal fan blade 704 to atomize the pesticide liquid. The periphery of the centrifugal fan blade 704 also has an annular structure 705 to reduce pesticide liquid adhesion and deliver the atomized pesticide liquid downwards. The pesticide tank 1 has a baffle 104 inside to reduce internal pesticide liquid fluctuations and make the drone's flight and turning more stable.

[0030] In this embodiment, the filter 2 is cylindrical, with the upper and lower ends being the inlet and outlet, respectively, which are used to connect the medicine tank 1 and the pump body 3. The outlet end of the pump body 3 is connected to a distributor 4, which has multiple branch ports for connecting pipes 6 in various directions. The pipes 6 are transparent soft rubber tubes, making it easy to observe whether the pipes 6 are blocked.

[0031] The annular structure 705 has a conical shape. The spiral blade structure inside the annular structure 705 is used to throw the liquid on the surface downwards. The centrifugal blades throw the liquid radially. The liquid hits the inner wall of the annular structure 705. The annular structure 705 rotates with the centrifugal fan blade 704. During the rotation, the liquid on the surface can be thrown downwards. The liquid thrown downwards can form a barrier on the outer ring, so that more liquid is sent downwards. Combined with the airflow driven by the fan blades of the drone, the liquid spraying is more accurate.

[0032] The cross-section of the medicine box 1 is T-shaped to facilitate stable placement on the drone frame. The lower part of the medicine box 1 is conical to facilitate the flow of all liquid medicine towards the bottom center. The interior of the medicine box 1 has no horizontal surface or groove design to avoid liquid medicine residue. The top of the medicine box 1 is equipped with a handle for easy handling by the user. The top of the medicine box 1 is also equipped with a lid 102 to facilitate the user adding liquid medicine to the medicine box 1. The medicine box 1 is equipped with a liquid level sensor. When the liquid medicine is low, the information is transmitted to the drone control center. After receiving the information, the drone control center can automatically return to land according to the takeoff point coordinates so that the user can replenish the liquid medicine.

[0033] The fixture includes a pipe ring 501, a fixing plate 5, and a clamp structure 502. The pipe ring 501 and the clamp structure 502 are located on the upper and lower sides of the fixing plate 5, respectively. The bottom front end of the fixing plate 5 is provided with a connecting part 503 for connecting the nozzle 7. The connecting part 503 includes a cylindrical structure with external threads and a cross-shaped insertion groove opened in the cylindrical structure for connecting and fixing the connecting rod. The fixture is made of carbon fiber material to achieve the requirements of being lightweight and strong. In this embodiment, the pipe ring 501 and the fixing plate 5 are an integral structure. When the hose needs to be replaced, the hose can be passed through the pipe ring 501. The clamp structure 502 can be detachably installed on the fixing plate 5 and fixed with screws. One end of the clamp structure 502 is screwed on, and the other end is provided with an eccentric handle 101. By opening or pressing the eccentric handle 101, the clamp structure 502 can be fixedly connected to the arm of the drone.

[0034] The nozzle 7 includes a connecting rod with a connector 701 at the upper end. A centrifugal motor 703 is installed inside the connecting rod to drive the centrifugal fan blade 704. The connecting rod has a rod-shaped structure, and the lower end of the connecting rod has a flared structure. The lower end of the connecting rod has a pipe 6 interface facing the medicine tank 1. After connecting the pipe 6, the medicine can be delivered to the center of the centrifugal fan blade 704. The connector 701 at the upper end includes a cross-shaped plug-in structure and an internally threaded cap 702. After the cross-shaped plug-in structure is inserted into the connecting part 503 of the fixing device, the cap 702 is screwed onto the connecting part 503 to complete the fixing of the connecting rod.

[0035] A conductive structure 103 is provided on one side of the medicine box 1. The conductive structure 103 is fitted into the side wall of the medicine box 1. The conductive structure 103 is provided with contacts for connecting the power supply of the drone. The conductive structure 103 is mainly used to place conductive cables. The contacts are located on the upper part of the conductive structure 103. Correspondingly, the drone frame is provided with matching elastic conductive contacts. When the medicine box 1 is placed on the drone frame, the conductive structure 103 and the elastic conductive contacts of the drone can make contact to achieve electrical connection. The setting of the elastic conductive contacts can ensure that even if the medicine box 1 shakes, the electric shock can still remain conductive.

[0036] A limiting groove is provided on the medicine box 1 at the position where it fits into the drone frame to reduce the shaking of the medicine box 1. The upper and lower parts of the medicine box 1 overlap on the drone frame at the transition position. An arc-shaped limiting groove is provided on the medicine box 1 at the overlapping position so that it can fit into the drone frame. When the drone turns during flight, the medicine box 1 can maintain a more stable state and will not shake.

[0037] A rotating joint 706 is provided between the upper and lower parts of the connecting rod to adjust the angle of the lower part of the nozzle 7. The rotating joint 706 can be pre-adjusted as needed. The rotating joint 706 mainly adjusts the front and rear angle of the nozzle 7. When the drone is flying, the nozzle 7 may be tilted, and the sprayed liquid will drift backward, reducing the spraying accuracy. When spraying, the nozzle 7 can be slightly forward by rotating the joint 706. When the drone is flying, the nozzle 7 remains vertically downward, and the sprayed liquid is delivered to the downward position more accurately, ensuring the spraying accuracy.

[0038] Taking a quadcopter agricultural drone as an example, it includes a medicine tank 1. A filter 2, a pump body 3, and a distributor 4 are installed at the bottom of the medicine tank 1. The distributor 4 has four connection ports for connecting pipes 6, which correspond to the nozzles 7 of the four rotors. Each rotor is equipped with a retainer. Each retainer has two clamp structures 502 and two pipe rings 501. After the pipe 6 passes through the pipe rings 501, it connects to the connection port on the nozzle 7. Then, it is fixed to the arm of the drone's rotor by the two clamp structures 502. Finally, the nozzle 7 is connected and installed to the retainer.

[0039] The plant protection drone spraying device in this solution utilizes a conical annular structure 705 and centrifugal fan blades 704 to atomize the pesticide solution. Through rotation, the pesticide impacting the inner wall is actively flung downwards, forming a downward air curtain barrier. This reduces the drift of fine droplets, directing them towards the target crop and ensuring the accuracy and effectiveness of the spraying.

[0040] The nozzle 7 is equipped with a rotating joint 706, which allows for pre-adjustment of the spray angle of the nozzle 7. When the drone is flying forward, the nozzle 7 can be slightly adjusted forward to compensate for the droplet drift caused by the airflow generated during flight, ensuring that the liquid tends to be sprayed vertically downwards during flight.

[0041] The medicine tank 1 features a design that is wider at the top and narrower at the bottom, with a conical shape at the bottom. This allows the liquid medicine to collect towards the center, facilitating emptying and cleaning. Inside the medicine tank 1, a partition 104 suppresses the movement of the liquid medicine during acceleration, turning, or encountering turbulent airflow, ensuring the drone's flight stability and maneuverability.

[0042] The fastener is made of carbon fiber, achieving both lightweight and high strength. It features a clamp structure 502 and a pipe ring 501, which secure the pipe 6 and allow for tool-free, quick, and easy attachment and removal of the fastener from the drone arm, improving the efficiency of outdoor maintenance.

[0043] The conductive structure 103 with contacts matches the elastic conductive contacts of the drone frame. This enables a quick connection where the medicine box 1 is powered on immediately upon placement, without the need for manual plugging and unplugging of wires. Example

[0044] In this embodiment, the structure of the spraying device is basically the same as that in Embodiment 1. The difference is that the lower part of the nozzle 7 adopts a quick-release connector, which makes it easy for users to quickly replace different atomizing components to achieve different spraying effects. The quick-release connector includes external threads on the lower part of the nozzle 7 and the atomizing component, as well as a clamp structure 502. The clamp can be quickly locked onto the external threads of the two structures and complete the connection of the two structural components.

[0045] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. The wind-sending type spraying device for plant protection unmanned aerial vehicle, comprising a medicine box, a pump body, a pipeline, a filter and a spray head, characterized in that, The medicine tank adopts a structure that is larger at the top and smaller at the bottom to facilitate the emptying of the medicine liquid. The pump body is located at the bottom of the medicine tank, and the filter is located between the medicine tank and the pump body. The pump body is connected to the nozzle through a pipeline. A retainer is provided on the pipeline for connecting the drone's arm. The nozzle is installed at the front end of the retainer. The lower end of the nozzle is equipped with a motor-driven centrifugal fan blade to atomize the medicine liquid. The periphery of the centrifugal fan blade is also equipped with a ring structure to reduce medicine liquid adhesion and deliver the atomized medicine liquid downwards. The medicine tank is equipped with a partition to reduce internal medicine liquid fluctuations and make the drone's flight and turning more stable.

2. The air-assisted spraying device for the plant protection unmanned aerial vehicle according to claim 1, characterized in that: The annular structure is conical in shape, and the internal spiral blade structure of the annular structure is used to throw the liquid medicine on the surface downwards.

3. The air-assisted spraying device for the plant protection unmanned aerial vehicle according to claim 1, characterized in that: The medicine box has a T-shaped cross-section to facilitate stable placement on the drone frame.

4. The air-assisted spraying device for the plant protection unmanned aerial vehicle according to claim 1, characterized in that: The fixture includes a pipe ring, a fixing plate, and a clamp structure. The pipe ring and clamp structure are located on the upper and lower sides of the fixing plate, respectively. The bottom front end of the fixing plate is provided with a connecting part for connecting the nozzle.

5. The air-assisted spraying device for agricultural drones according to claim 1, characterized in that: The nozzle includes a connecting rod, the upper end of which is provided with a connector, and a centrifugal motor is provided inside the connecting rod for driving centrifugal fan blades.

6. The air-assisted spraying device for the plant-protection unmanned aerial vehicle according to claim 1, characterized in that: The medicine box has a conductive structure on one side, which is fitted into the side wall of the medicine box. The conductive structure has contacts for connecting the drone power supply.

7. The air-assisted spraying device for the plant-protection unmanned aerial vehicle according to claim 1, characterized in that: A limiting groove is provided on the medicine box at the position where it fits against the drone frame to reduce the shaking of the medicine box.

8. The air-assisted spraying device for the plant-protection unmanned aerial vehicle according to claim 5, characterized in that: A rotating joint is provided between the upper and lower parts of the connecting rod for adjusting the angle of the lower part of the nozzle.

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