Front filtering device for preventing pesticide spraying opening of plant protection unmanned aerial vehicle from being blocked

Abstract

The utility model discloses a front filtering device for preventing a pesticide spraying opening of a plant protection unmanned aerial vehicle from being blocked. The front filtering device comprises a pressurizing barrel, a filtering barrel and a pesticide liquid guiding-in pipe set. The filtering barrel is a conical barrel and is arranged at the bottom of the pressurizing barrel, a conical lantern ring is arranged in the filtering barrel, and a filtering net is arranged in the conical lantern ring; the liquid medicine leading-in pipe set is arranged at the bottom of the filtering barrel and connected with an unmanned aerial vehicle medicine box filling opening. The liquid medicine leading-in pipe set is in rapid butt joint with the unmanned aerial vehicle pesticide box, the liquid medicine leading-in process is simplified, impurities and insoluble particles are filtered out through the filtering barrel, blocking of a pesticide spraying opening is effectively prevented, liquid medicine can be evenly mixed, the filtering efficiency is improved, the flow speed of the liquid medicine passing through the filtering net can be increased through the effect of external pressure, and the pesticide spraying effect is improved. Therefore, the operation efficiency of the plant protection unmanned aerial vehicle can be remarkably improved, and the effect is particularly obvious in large-scale pesticide spraying operation.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, in particular to a front filtering device for preventing the spraying orifice of a plant protection unmanned aerial vehicle from being blocked. Background Art

[0002] A plant protection unmanned aerial vehicle can efficiently and evenly spray pesticides on crops, improving agricultural production efficiency. However, during the pesticide spraying process of the unmanned aerial vehicle, the blockage problem of the spraying orifice has always been a key factor affecting the operation efficiency and quality. Among them, impurities and insoluble particles contained in the liquid medicine are the main reasons for the blockage of the spraying orifice.

[0003] To solve the above technical problems, those skilled in the art have proposed to equip a filter screen in the medicine box of the unmanned aerial vehicle. However, these filter screens are very difficult to clean and replace after being blocked, resulting in a gradual decline in the filtering effect of the filter screen during long-term operation, thereby increasing the risk of blockage of the spraying orifice. In addition, the existing front filtering methods usually use filter meshes or high-density silk stockings to filter the liquid medicine. The problems of these filtering devices are that they are not easy to install and disassemble, resulting in a cumbersome process for cleaning and replacing the filter screen, increasing the maintenance cost and time, and having low filtering efficiency, making it difficult to meet the requirements of high-efficiency operation. Summary of the Invention

[0004] To solve the above technical problems, the utility model provides a front filtering device for preventing the spraying orifice of a plant protection unmanned aerial vehicle from being blocked. To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary part is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments. Its sole purpose is to present some concepts in a simple form as a preamble to the subsequent detailed description.

[0005] The utility model adopts the following technical solutions:

[0006] Provide a front filtering device for preventing the spraying orifice of a plant protection unmanned aerial vehicle from being blocked, including: a pressurizing barrel, a filtering barrel, and a liquid medicine inlet pipe group; a supporting platform plate is arranged in the pressurizing barrel, a screw hole is opened on the supporting platform plate, a stirring screw rod is in threaded connection with the supporting platform plate, a driving part is arranged at the top end of the stirring screw rod, and a stirring impeller is arranged at the bottom end of the stirring screw rod; the filtering barrel is a conical barrel and is arranged at the bottom of the pressurizing barrel, a conical sleeve ring is arranged in the filtering barrel, and a filter screen is arranged in the conical sleeve ring; the liquid medicine inlet pipe group is arranged at the bottom of the filtering barrel and is connected with the filling port of the unmanned aerial vehicle medicine box.

[0007] Further, a bearing platform is provided on the inner wall of the pressure barrel; the support platform plate includes: an annular platform plate body and a support frustum. The annular platform plate body is located on the bearing platform. The support frustum is connected to the annular platform plate body through a suspension rod. A threaded hole is provided on the support frustum, and the stirring screw is threadedly connected to the support frustum.

[0008] Further, the driving member is an L-shaped rocker. One end of the L-shaped rocker is a hexagonal rod, and a handle is provided at the other end. A hexagonal prism groove adapted to the hexagonal rod is provided at the top end of the stirring screw.

[0009] Further, the liquid medicine inlet pipe group includes: a liquid inlet docking port, a rubber conduit, and a liquid outlet docking port. The liquid inlet docking port and the liquid outlet docking port are respectively arranged at both ends of the rubber conduit. The liquid inlet docking port is connected to the filter barrel, and the liquid outlet docking port is connected to the filling port of the UAV medicine box.

[0010] Further, a front filter device for preventing the spray nozzle of a plant protection UAV from being blocked further includes: a loading cart, and the pressure barrel is arranged on the loading cart. The loading cart includes: a chassis, a docking platform, and a frame body. The docking platform and the frame body are arranged on the upper surface of the chassis, and the pressure barrel is connected to the frame body.

[0011] Further, the loading cart further includes: a tipping frame for placing a pesticide barrel. One end of the tipping frame is hinged to the frame body, and the other end of the tipping frame is connected to a screw lift mechanism, and the screw lift mechanism is arranged on the chassis.

[0012] Further, a notch is provided at the barrel opening of the pressure barrel, and an inclined conveying groove is arranged in the notch. The water inlet end of the conveying groove faces the tipping frame, and the water outlet end of the conveying groove extends into the barrel of the pressure barrel.

[0013] Further, a plurality of the conical sleeve rings are arranged in the filter barrel, and each of the conical sleeve rings is evenly arranged in the filter barrel at intervals from top to bottom and the diameter gradually decreases.

[0014] The beneficial effects brought by the present utility model: Through the quick docking of the liquid medicine inlet pipe group with the UAV medicine box, the liquid medicine inlet process is simplified. The filter barrel is used to filter out impurities and insoluble particles, effectively preventing the blockage of the spray nozzle. The driving member drives the stirring screw to rotate, and the rotation of the stirring impeller is driven by the downward moving screw, which not only helps to evenly mix the liquid medicine and improve the filtering efficiency, but also can accelerate the flow rate of the liquid medicine through the filter screen under the action of external pressure, thereby improving the filtering and filling speed. Therefore, this application can significantly improve the operation efficiency of the plant protection UAV, especially obvious in large-scale spraying operations. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 It is a schematic external structure diagram of a front filtering device for preventing the spraying port of a plant protection unmanned aerial vehicle from being blocked according to the present invention;

[0017] Figure 2 It is a schematic internal structure diagram of a front filtering device for preventing the spraying port of a plant protection unmanned aerial vehicle from being blocked according to the present invention;

[0018] Figure 3 It is a schematic connection diagram of a pressure barrel, a support platform plate and a stirring screw according to the present invention. Detailed implementation manners

[0019] The following will describe the embodiments of the present invention in detail with reference to the drawings. It should be clear that the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0020] As Figures 1 - 3 shown, in some illustrative embodiments, a front filtering device for preventing the spraying port of a plant protection unmanned aerial vehicle from being blocked is provided, including: a pressure barrel 1, a filtering barrel 2, a liquid medicine inlet pipe group 3, a power assembly and a loading cart 4.

[0021] The pressure barrel 1 is used to contain the pesticide to be filtered. The power assembly is arranged in the pressure barrel 1, and the pesticide is stirred through the power assembly to promote the uniformity of the liquid medicine. In addition, the design of the power assembly realizes providing a thrust for the flow of the pesticide while stirring, that is, the rotational movement generated by the power assembly will form a flow thrust in the liquid medicine, and at the same time, the stirring impeller gradually moves downward, which helps to push the liquid medicine towards the filtering barrel 2 to accelerate the filtering and filling speed. Therefore, in this application, while ensuring the filtering effect, the filling speed is improved, so as to ensure the operation efficiency of the plant protection unmanned aerial vehicle and be more suitable for large-scale spraying operations.

[0022] Specifically, the power assembly includes: a support platform plate 5, a stirring screw 6, a driving part 7, and a stirring impeller 8.

[0023] On the inner wall of the pressure barrel 1, a bearing platform 101 is provided. The bearing platform 101 is an annular table surface welded inside the pressure barrel 1, and its function is to provide an installation position for the power assembly, ensuring that the power assembly can be stably located on it and can effectively perform stirring and pushing operations.

[0024] The support platform plate 5 provides a stable support platform for the stirring screw 6 and the stirring impeller 8. It specifically includes: an annular platform plate main body 501, a suspension rod 502, and a support frustum 503. The annular platform plate main body 501 is located on the bearing platform 101. During specific implementation, a tooth groove structure that can be meshed with each other can be opened on the lower surface of the support platform plate 5 and the upper surface of the bearing platform 101 to achieve relative fixation between the two. The support frustum 503 is connected to the annular platform plate main body 501 through the suspension rod 502 and is located at its central part. The suspension rod 502 has sufficient strength and rigidity to withstand the forces and torques of the stirring screw 6 and the stirring impeller 8 during operation. The support frustum 503 is a cylindrical structure and is provided with a threaded hole, and the stirring screw 6 is threadedly connected to the support frustum 503.

[0025] A driving part 7 is provided at the top end of the stirring screw 6, and a stirring impeller 8 is provided at the bottom end of the stirring screw 6. When the driving part 7 is rotated, the stirring screw 6 rotates along with it, and then drives the stirring impeller 8 at the bottom to rotate to stir the liquid medicine. One of the functions of stirring the liquid medicine is to promote the uniformity of the liquid medicine, and the second function is that the rotating action forms a flow thrust. While the above process is being executed, since the stirring screw 6 is threadedly connected to the support frustum 503, the stirring screw 6 will gradually move downward as it rotates, and then drive the stirring impeller 8 to gradually approach the filter barrel 2, further pushing the liquid medicine towards the filter barrel 2 to accelerate the filtering and filling speed. To sum up, the design and operation mechanism of the stirring screw 6 and the stirring impeller 8 not only ensure the uniformity and flow thrust of the liquid medicine, but also further improve the filtering and filling speed through the axial movement characteristics of the threaded connection, thereby optimizing the operation process of the entire plant protection UAV spraying system.

[0026] The driving part 7 is an L-shaped rocker. One end of the L-shaped rocker is a hexagonal rod, and the other end is provided with a handle 701. A hexagonal prism groove adapted to the hexagonal rod is opened at the top end of the stirring screw 6. Adaptation means that the hexagonal rod can be embedded in the hexagonal prism groove. The design of the hexagonal rod and the hexagonal prism groove ensures the uniqueness of the connection between the L-shaped rocker and the stirring screw 6, preventing misalignment during driving. The hand force of the staff is transmitted to the L-shaped rocker through the handle 701, and when the driving part 7 is driven, it can further drive the stirring screw 6 to rotate. The embedded connection can not only ensure the stability of the connection part, but also simplify the operation and installation process of the staff.

[0027] The filter barrel 2 is a conical barrel. The conical structure helps to guide the pesticide liquid to flow towards the bottom of the barrel and finally enter the drone medicine box through the liquid medicine inlet pipe group 3. The filter barrel 2 is arranged at the bottom of the pressurized barrel 1 and is used to pre-filter the pesticide before filling. A conical collar 201 is arranged inside the filter barrel 2, and a filter screen 202 is arranged inside the conical collar 201. The conical design of the conical collar 201 matches the inner wall of the filter barrel 2 and is fixed inside the barrel, providing a stable support frame for the filter screen 202. The mesh size of the filter screen 202 is designed to intercept larger solid particles, impurities and residues in the liquid medicine, preventing these substances from entering the drone medicine box and the subsequent spraying system.

[0028] Several conical collars 201 are arranged inside the filter barrel 2. Each conical collar 201 is arranged inside the filter barrel 2 at equal intervals from top to bottom and the diameter gradually decreases, which helps to ensure that the liquid medicine can flow smoothly through each filtering layer during the filtering process. The liquid medicine first contacts the topmost conical collar 201, and the mesh of its filter screen 202 is larger, which can intercept larger impurities and particles. As the liquid medicine flows downward, it will pass through each conical collar 201 in turn. Since the diameter of each collar gradually decreases, the mesh of the internal filter screen 202 also gradually becomes smaller, thereby filtering out finer impurities. Through this multi-layer conical collar 201 filtering design, firstly, the filtering effect of the liquid medicine is improved; secondly, each conical collar 201 can be taken out separately for cleaning or replacement, which is convenient for maintenance and upkeep; thirdly, according to different filtering requirements, the filtering precision can be adjusted by replacing the filter screen 202 with different mesh sizes.

[0029] The liquid medicine inlet pipe group 3 is arranged at the bottom of the filter barrel 2 and is connected to the filling port of the drone medicine box. The liquid medicine inlet pipe group 3 includes: a liquid inlet docking port 301, a rubber conduit 302 and a liquid outlet docking port 303; the liquid inlet docking port 301 and the liquid outlet docking port 303 are respectively arranged at both ends of the rubber conduit 302. The liquid inlet docking port 301 is connected to the filter barrel 2, and the liquid outlet docking port 303 is connected to the filling port of the drone medicine box. The structure of the liquid inlet docking port 301 needs to match the outlet of the filter barrel 2 to ensure a sealed and stable connection. The rubber conduit 302 is the main part of the liquid medicine inlet pipe group 3 and is usually made of a rubber material that is corrosion-resistant and chemical-resistant to adapt to the characteristics of pesticides. The design of the liquid outlet docking port 303 also needs to ensure a match with the filling port of the medicine box to ensure that the liquid medicine flows smoothly into the medicine box.

[0030] The loading cart 4 is used to carry the pressurized barrel 1, the filtration barrel 2, and the pesticide barrel 9. The loading cart 4 includes: a chassis 401, a docking station 402, a frame body 403, and a tipping frame 404. The pressurized barrel 1 is welded to the frame body 403. The docking station 402 and the frame body 403 are arranged on the upper surface of the chassis 401, and walking wheels are provided at the bottom of the chassis 401. The chassis 401 is the basic part of the loading cart 4 to bear the weight loaded above. The docking station 402 is a platform on the cart for temporarily docking the drone to facilitate the filling operation.

[0031] The tipping frame 404 is used to place the pesticide barrel 9. One end of the tipping frame 404 is connected to the frame body 403 through a hinge point, which enables the tipping frame 404 to rotate around this hinge point. The other end of the tipping frame 404 is connected to the screw lifting mechanism 10, and the screw lifting mechanism 10 is arranged on the chassis 401. When it is necessary to pour the liquid medicine in the pesticide barrel 9 into the pressurized barrel 1, the screw lifting mechanism 10 is operated to gradually tilt the tipping frame 404. As the tipping frame tilts, the liquid medicine in the pesticide barrel 9 will slowly flow along the barrel wall into the pressurized barrel 1. By controlling the tilting angle of the tipping frame 404, the pouring speed and flow rate of the liquid medicine can be controlled to avoid splashing or generating bubbles of the liquid medicine and ensure that the liquid medicine is accurately poured into the pressurized barrel 1.

[0032] The screw lifting mechanism 10 adopts an existing structure. By stepping on the pedal, the worm and gear system is driven to drive the screw transmission device, so that the screw lifting mechanism slowly rises or falls. At the same time, a worm and gear reducer is equipped to reduce the speed and increase the torque, thereby slowing down the lifting speed. Specifically, when the staff steps on the pedal, the pedal converts the linear motion of stepping on through a connecting rod or other transmission mechanisms into the rotational motion of the worm and gear system. The pedal drives the worm, and the spiral shape of the worm causes the worm gear to generate a motion perpendicular to the axis of the worm when the worm rotates. The worm and gear system has a self-locking function, that is, the worm can drive the worm gear to rotate, but the worm gear cannot drive the worm to rotate, which helps to maintain the position of the lifting mechanism when the pedal is released. This design can achieve precise and stable lifting control.

[0033] A notch 102 is opened at the barrel mouth of the pressurized barrel 1, and an inclined conveying groove 103 is arranged in the notch 102. The water inlet end of the conveying groove 103 faces the tipping frame 404, and the water outlet end of the conveying groove 103 extends into the barrel of the pressurized barrel 1. When the tipping frame 404 pours the liquid medicine in the pesticide barrel 9, the liquid medicine will flow along the tipping frame to the water inlet end of the conveying groove 103 and finally enter the pressurized barrel 1.

[0034] The above are only specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A front filtering device for preventing the spray nozzle of a plant protection UAV from being blocked, characterized in that, Including: A pressurizing barrel, a filtering barrel and a liquid medicine inlet pipe group; A support platform plate is arranged in the pressurizing barrel, screw holes are formed in the support platform plate, a stirring screw rod is in threaded connection with the support platform plate, a driving part is arranged at the top end of the stirring screw rod, and a stirring impeller is arranged at the bottom end of the stirring screw rod; the filtering barrel is a conical barrel and is arranged at the bottom of the pressurizing barrel, a conical sleeve ring is arranged in the filtering barrel, and a filter screen is arranged in the conical sleeve ring; the liquid medicine inlet pipe group is arranged at the bottom of the filtering barrel and is connected with the filling port of the UAV medicine box.

2. The pre-filtering device for preventing the clogging of the spraying nozzle of a plant protection UAV according to claim 1, wherein, A bearing platform is arranged on the inner wall of the barrel of the pressurizing barrel; The support platform plate includes: an annular platform plate main body and a support frustum. The annular platform plate main body is located on the bearing platform. The support frustum is connected with the annular platform plate main body through a suspension rod. Screw holes are formed in the support frustum, and the stirring screw rod is in threaded connection with the support frustum.

3. The front filter device for preventing the spray nozzle of a plant protection UAV from being blocked according to claim 2, wherein The driving part is an L-shaped rocker. One end of the L-shaped rocker is a hexagonal rod, and a handle is arranged at the other end; a hexagonal prism groove adapted to the hexagonal rod is formed at the top end of the stirring screw rod.

4. The pre-filtering device for preventing the clogging of the spraying nozzle of the plant protection UAV according to claim 3, wherein, The liquid medicine inlet pipe group includes: a liquid inlet docking port, a rubber conduit and a liquid outlet docking port; the liquid inlet docking port and the liquid outlet docking port are respectively arranged at both ends of the rubber conduit. The liquid inlet docking port is connected with the filtering barrel, and the liquid outlet docking port is connected with the filling port of the UAV medicine box.

5. The pre-filtering device for preventing the spraying orifice of a plant protection UAV from being blocked according to claim 4, wherein, Also included is: A loading cart, and the pressurizing barrel is arranged on the loading cart; the loading cart includes: a chassis, a docking platform and a frame body. The docking platform and the frame body are arranged on the upper surface of the chassis, and the pressurizing barrel is connected with the frame body.

6. The pre-filtering device for preventing the spraying orifice of a plant protection UAV from being blocked according to claim 5, wherein The loading cart further includes: a turnover rack for placing a pesticide barrel; one end of the turnover rack is hinged to the frame body, the other end of the turnover rack is connected with a screw lifting mechanism, and the screw lifting mechanism is arranged on the chassis.

7. The pre-filter device for preventing the spraying orifice of a plant protection UAV from being blocked according to claim 6, wherein A notch is formed at the barrel opening of the pressurizing barrel, an inclined conveying groove is arranged in the notch, the water inlet end of the conveying groove faces the turnover rack, and the water outlet end of the conveying groove extends towards the inside of the barrel of the pressurizing barrel.

8. The pre-filtering device for preventing the spraying orifice of a plant protection UAV from being blocked according to claim 7, wherein, A plurality of the conical sleeve rings are arranged in the filtering barrel, and the conical sleeve rings are arranged in the filtering barrel at equal intervals from top to bottom and the diameters gradually decrease.

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