A liquid spraying device for a drone

Abstract

This invention discloses a spraying device for unmanned aerial vehicles (UAVs), relating to the field of UAV spraying technology. Specifically, it includes a UAV body, a controller mounted on the UAV body, the controller having a remote operation module and a power supply module, and further includes a quick-release mechanism, a width adjustment frame, an angle offset base, a spraying pipe, a fixing frame, and a water supply assembly located at the bottom of the UAV body. This invention, through the angle offset base and angle drive assembly, can drive the spraying pipe to freely deflect along the vertical plane, allowing the spraying direction to fully adapt to the longitudinal growth height of climbing crops, achieving full height coverage of the pesticide along the longitudinal canopy, avoiding obstruction of the pesticide by the top leaves, thereby eliminating spraying blind spots in the lower and middle parts of the canopy. Furthermore, through the bidirectional screw synchronous transmission design of the width adjustment frame and the moving drive assembly, it can adapt to different planting row spacings of adjacent climbing crops.

Description

Technical Field

[0001] This invention relates to the field of liquid spraying technology for drones, and more particularly to a liquid spraying device for drones. Background Technology

[0002] With the rapid development of precision agriculture technology, agricultural drones have become one of the core pieces of equipment for field plant protection operations such as crop pest and disease control and foliar fertilizer application in my country, thanks to their advantages such as high operating efficiency, strong maneuverability, low labor intensity, and adaptability to complex plots. The spraying devices currently used with agricultural drones generally adopt a horizontal spray boom structure fixedly installed under the drone's fuselage. Several vertically downward atomizing nozzles are arranged on the spray boom. During operation, the downwash airflow generated by the drone's rotors vertically delivers the atomized pesticide solution from the nozzles to the crop canopy.

[0003] The aforementioned drone spraying method is well-suited for spraying the planar canopy of field crops such as wheat and rice. However, in my country's economic crop planting system, climbing crops such as grapes, kiwifruit, passion fruit, cucumbers, green beans, loofah, greenhouse-grown tomatoes, and bell peppers occupy a large planting scale. These crops have typical vertical climbing growth characteristics, with their leaves, fruiting branches, and fruit ears distributed in layers along the vertical height. The high incidence of pests and diseases is concentrated in the underside of leaves, the inner side of the vines in the middle and lower part of the canopy, and the base of the fruit ears, which are hidden parts.

[0004] Existing drone spraying devices are limited by their fixed vertical downward spraying structure. When carrying out plant protection operations on the aforementioned climbing crops, the existing devices use a top-down spraying method. The atomized liquid can only act on the top surface leaves of the climbing crop canopy and cannot achieve penetrating spraying along the longitudinal growth direction of the crop. A large amount of liquid is blocked by the top leaves and cannot reach the core target parts such as vines, leaf backs, and fruit ears in the middle and lower parts of the canopy, forming a large area of ​​spraying blind spots and reducing spraying efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a liquid spraying device for unmanned aerial vehicles (UAVs).

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A liquid spraying device for a drone includes a drone body, a controller mounted on the drone body, the controller having a remote operation module and a power supply module, and a quick-release mechanism mounted on the bottom of the drone body. The width adjustment bracket is installed on the bottom of the drone body via the quick-release mechanism; Angle offset bases are provided in two and symmetrically connected to the width adjustment frame. Each angle offset base is provided with an angle drive component for angle offset of its movable end. The width adjustment frame is provided with a movement drive component for driving the two angle offset bases to move synchronously towards each other along their set direction. The spray pipe has one end connected to the movable end of the angle offset base via a locking mechanism. Several water outlet pipes are provided along the axis of the spray pipe, and the output direction of the water outlet pipes is perpendicular to the axis of the spray pipe. A fixed frame is provided, and a water tank is provided at the bottom of the drone body, and the water tank is fixed inside the fixed frame; A water supply assembly is used to deliver the liquid medicine in the water tank to the input end of the spray pipe.

[0007] Preferably, the width adjustment frame includes a transverse frame, a second bidirectional lead screw, and two sliding blocks; wherein, the second bidirectional lead screw is arranged along the extension direction of the transverse frame, the second bidirectional lead screw is rotatably connected to the transverse frame via a shaft frame, two sliding grooves extending axially along the second bidirectional lead screw are symmetrically opened on the transverse frame, the two sliding blocks are slidably connected to the two sliding grooves respectively, and the two sliding blocks are symmetrically arranged at both ends of the second bidirectional lead screw and are threadedly connected to the second bidirectional lead screw.

[0008] Furthermore: the quick-installation mechanism includes a mounting plate, a connecting plate, and mounting components; wherein, the mounting plate is detachably connected to the bottom of the UAV body by bolts, and the connecting plate is located between the horizontal frame and the mounting plate, and is used to fix the mounting plate and the horizontal frame to form an integral structure; The mounting components include a wedge block, a push block, a sliding rod, a sliding sleeve, a double-acting screw, and a handwheel. The double-acting screw is rotatably connected to a connecting plate. Two push blocks are provided, each with a wedge block on its side facing the mounting plate and the transverse frame. The two push blocks are symmetrically connected to both ends of the double-acting screw and threaded to it. The connecting plate has through mounting holes on both sides of the side walls near the mounting plate and the transverse frame, and through mounting holes on both sides of the side wall near the connecting plate. The first and second mounting holes correspond to each other and are suitable for the wedge blocks to pass through. The sliding rod is arranged along the axis of the double-acting screw and fixedly connected to the connecting plate. The sliding sleeve is fixedly connected to the push block and slidably connected to the sliding rod. One end of the double-acting screw extends outside the connecting plate and is coaxially connected to the handwheel.

[0009] Based on the aforementioned scheme: the mobile drive assembly includes a motor mounting plate, a driven gear, a driving gear, and a first drive motor; wherein, the motor mounting plate is connected to a transverse frame, the driven gear is coaxially connected to a second double-acting lead screw, the driving gear is rotatably connected to the motor mounting plate via a drive shaft, the driving gear meshes with the driven gear, the first drive motor is mounted on the motor mounting plate, and the output end of the first drive motor is connected to the drive shaft, and the first drive motor is electrically connected to the controller.

[0010] A preferred embodiment of the aforementioned scheme is that the angle offset base includes a fixed plate, a deflection shaft, and a deflection column; wherein the fixed plate is connected to a corresponding sliding block, the deflection shaft is rotatably connected to the fixed plate, and the deflection column is coaxially connected to the deflection shaft.

[0011] As a further embodiment of the present invention: the angle driving assembly includes a second drive motor, a worm, a worm wheel, and a motor mounting box; wherein, the worm wheel and the worm are meshed, the motor mounting box is fixedly connected to a fixed plate, the worm wheel is coaxially connected to a deflection shaft, the worm is rotatably connected to the inner wall of the motor mounting box, the second drive motor is mounted on the motor mounting box, the output end of the second drive motor is connected to the worm, and the second drive motor is electrically connected to a controller.

[0012] Meanwhile, the locking mechanism includes a locking tube, a fixed water guide tube, a rotating water guide tube, a rotary joint, a stabilizing tube, a connecting plate, and a rotating wheel; wherein, the locking tube is connected to the deflection column, the fixed water guide tube is fixedly connected inside the locking tube, the rotating water guide tube is rotatably connected to the inner wall of the locking tube, and the output end of the fixed water guide tube and the input end of the rotating water guide tube are connected through the rotary joint; the stabilizing tube is connected to the locking tube through the connecting plate, and the stabilizing tube and the locking tube are coaxially arranged, forming a rotational gap between the stabilizing tube and the locking tube; The rotating water guide pipe has a threaded portion 1 at the end away from the fixed water guide pipe, and the rotating water guide pipe is rotatably connected to the stabilizing pipe. The rotating wheel is located at the rotation interval position and is coaxially connected to the outer wall of the rotating water guide pipe. The inner wall of the stabilizing pipe away from the rotating water guide pipe has an inlet groove along its axial direction. One end of the spray pipe has a threaded portion 2 that can be threadedly connected to the threaded portion 1, and the outer wall has an inlet protrusion that can slide with the inlet groove. The outer wall of the spray pipe near the threaded portion 2 has an elastic ring, which is in movable contact with the end of the rotating water guide pipe.

[0013] As a preferred embodiment of the present invention: an air supply plate corresponding to the water outlet pipe is installed on the spray pipe along its axis; an installation shell is fixedly connected to the air supply plate; a fan body is installed inside the installation shell; ventilation holes that allow airflow are opened at both ends of the installation shell; and the output end of the fan body is in the same direction as the output end of the water outlet pipe. A protective plate is provided on the side of the spray pipe away from the water outlet pipe, and the protective plate is fixedly connected to the stabilizing pipe.

[0014] Meanwhile, a suspension is fixedly connected to the bottom of the transverse frame, and the fixed frame is assembled on the suspension. The fixed frame includes a U-shaped bracket, a connecting bracket, a fixed baffle, and a movable baffle. At least two brackets are provided, and two adjacent brackets are connected by the connecting bracket. The fixed baffle is fixedly connected to one of the brackets on one side, and the movable baffle is hinged to the other bracket on the other side. The movable end of the movable baffle is fixed to the corresponding bracket by a buckle assembly. The buckle assembly includes a buckle box, a fixed pin, a movable pin, a pull rod, a telescopic spring, and a stop plate. The buckle box is fixedly connected to a corresponding bracket. The fixed pin is fixedly connected to the movable end of the stop plate. A through groove is provided on the side wall of the buckle box for the fixed pin to pass through. The pull rod is slidably connected to the buckle box. The movable pin is fixedly connected to the end of the pull rod. Both ends of the telescopic spring are connected to the inner wall of the buckle box and the movable pin, respectively. The stop plate is connected to the pull rod and is in movable contact with the outer wall of the buckle box.

[0015] As a preferred embodiment of the present invention: two water supply components are provided, each corresponding to one of the two spray pipes. The water supply components include a water pipe connector, a first telescopic water pipe, a second telescopic water pipe, and a water pump. The water pipe connector is installed on a water tank, and the input end of the water pipe connector extends into the water tank. The water pump is installed on a suspension. The output end of the first telescopic water pipe is connected to the input end of the water pump. The input end of the first telescopic water pipe is movably connected to the output end of the water pipe connector. The input end of the second telescopic water pipe is connected to the output end of the water pump. The output end of the second telescopic water pipe is connected to the interior of a fixed water guide pipe.

[0016] The beneficial effects of this invention are as follows: 1. This invention, through an angle offset base and an angle driving component, can drive the spray pipe to freely deflect along the vertical plane, so that the spraying direction can be fully adapted to the longitudinal growth height of the climbing crop, allowing the liquid to achieve full height coverage along the longitudinal canopy of the crop, avoiding the top leaves from blocking the liquid, and eliminating the spraying blind spots in the lower part of the canopy from the root.

[0017] 2. This invention, by setting up a wind-assisted structure that corresponds one-to-one with the water outlet pipe and outputs in the same direction, allows the high-speed directional airflow generated by the fan body to carry atomized pesticide droplets, powerfully penetrating the gaps in the leaves of the crop canopy, and reaching the hidden target areas where pests and diseases are highly prevalent, such as the back of leaves, the inner side of vines, and the base of fruit ears in the middle and lower part of the canopy. This completely solves the problem that traditional devices cannot reach the core control area with pesticide liquid, and greatly improves the spraying efficiency and plant protection operation effect.

[0018] 3. This invention, through the bidirectional screw synchronous transmission design of the width adjustment frame and the moving drive component, can remotely and precisely adjust the lateral spacing of the spray pipes on both sides to adapt to different planting row spacings of adjacent climbing crops; and the synchronous symmetrical adjustment feature can ensure that the load on both sides is always symmetrical during the flight of the drone, avoiding the impact of the center of gravity shift on flight stability.

[0019] 4. The present invention uses independently set angle driving components on both sides to control the deflection angle of the spray pipes on both sides. This can adapt to the longitudinal canopy distribution of crops with different plant heights, and also meet the differentiated operation needs of crops with inconsistent heights on both sides and irregular planting scenarios, greatly improving the device's adaptability to all scenarios.

[0020] 5. In this invention, the spray pipe achieves tool-free quick installation and disassembly through a dedicated locking mechanism. It adopts a docking structure with threaded locking and guide limit. The installation and disassembly of the spray pipe can be completed simply by rotating the rotating wheel. This facilitates quick replacement of spray pipes of different lengths and nozzle specifications, flexibly adapting to different operational needs, while reducing the maintenance and replacement costs of vulnerable parts. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of a liquid spraying device for a drone proposed in this invention; Figure 2 This is a schematic diagram of the planar structure of a liquid spraying device for a drone proposed in this invention; Figure 3 This invention proposes a liquid spraying device for unmanned aerial vehicles (UAVs). Figure 1 Schematic diagram of the middle section; Figure 4 This invention proposes a liquid spraying device for unmanned aerial vehicles (UAVs). Figure 2 Schematic diagram of the middle section; Figure 5 This is a three-dimensional structural diagram of a quick-assembly mechanism for a liquid spraying device for a drone proposed in this invention; Figure 6 This is a schematic diagram of the exploded structure of an angle offset base for a liquid spraying device for a drone proposed in this invention. Figure 7 This invention proposes a liquid spraying device for unmanned aerial vehicles (UAVs). Figure 3 Schematic diagram of the middle section; Figure 8 This is a cross-sectional schematic diagram of a locking mechanism for a liquid spraying device for a drone proposed in this invention; Figure 9 This is an exploded view of the fan body and mounting housing of a liquid spraying device for a drone proposed in this invention. Figure 10 This is a schematic diagram of the fixed frame and water tank structure of a liquid spraying device for a drone proposed in this invention. Figure 11 This is a schematic cross-sectional view of a snap-fit ​​assembly for a liquid spraying device for a drone, as proposed in this invention. Figure 12 This is a partial structural schematic diagram of a liquid spraying device for a drone proposed in this invention.

[0022] In the diagram: 1. UAV body; 2. Quick-release mechanism; 3. Width adjustment frame; 4. Angle offset base; 5. Spray pipe; 6. Fixing frame; 7. Water outlet pipe; 8. Nozzle; 9. Horizontal frame; 10. Two-way lead screw II; 11. Sliding block; 12. Sliding groove; 13. Shaft bracket; 14. Mounting plate; 15. Connecting plate; 16. Wedge block; 17. Push block; 18. Sliding rod; 19. Sliding sleeve; 20. Two-way lead screw I; 21. Handwheel; 22. Driven gear; 23. Motor mounting plate; 24. Drive gear; 25. Drive shaft; 26. Fixing plate; 27. Deflection shaft; 28. Deflection column; 29. ​​Drive motor II; 30. Worm gear; 31. Worm wheel; 32. Motor mounting box; 34. Locking tube; 35. Fixed water guide. 36. Rotary water guide pipe; 37. Rotary joint; 38. Stabilizing pipe; 39. Connecting plate; 40. Rotating wheel; 41. Elastic ring; 42. Threaded part one; 43. Threaded part two; 44. Inlet groove; 45. Inlet protrusion; 46. Air supply plate; 47. Mounting housing; 48. Fan body; 49. Ventilation hole; 50. Protective plate; 51. Suspension; 52. Bracket one; 53. Connecting bracket; 54. Fixed baffle; 55. Movable baffle; 56. Buckle box; 57. Fixed pin block; 58. Movable pin block; 59. Pull rod; 60. Telescopic spring; 61. Blocking plate; 62. Through groove; 63. Water pipe joint; 64. Telescopic water pipe one; 65. Telescopic water pipe two; 66. Water pump; 67. Water tank; 68. Drive motor one. Detailed Implementation

[0023] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] A liquid spraying device for drones, such as Figures 1-12 As shown, the device includes a drone body 1, a controller mounted on the drone body 1, a remote operation module and a power supply module. The remote operation module supports remote wireless command transmission and reception and operation data feedback from the ground end, and the power supply module provides stable power supply for all electrical components in the device. It also includes a quick-release mechanism 2, a width adjustment frame 3, an angle offset base 4, a spray pipe 5, a fixing frame 6 and a water supply assembly. Specifically, the quick-installation mechanism 2 is located at the bottom of the drone body 1; the width adjustment frame 3 is installed at the bottom of the drone body 1 via the quick-installation mechanism 2; two angle offset bases 4 are provided and symmetrically connected to the width adjustment frame 3. The angle offset base 4 is provided with an angle drive component for the angle offset of its movable end, and the width adjustment frame 3 is provided with a movement drive component for driving the two angle offset bases 4 to move synchronously towards each other along their set direction; one end of the spray pipe 5 is connected to the movable end of the angle offset base 4 via a locking mechanism, and several water outlet pipes 7 are provided along its axis on the spray pipe 5. The output direction of the water outlet pipes 7 is perpendicular to the axis of the spray pipe 5, and a nozzle 8 is connected to the output end of the water outlet pipes 7; a water tank 67 is provided at the bottom of the drone body 1, and the water tank 67 is fixed in the fixed frame 6; the water supply component is used to transport the liquid medicine in the water tank 67 to the input end of the spray pipe 5; When not in use, the above structure has the spray pipe 5 in a retracted state, that is, the spray pipe 5 is set parallel to the width adjustment frame 3, which avoids the spray pipe 5 from affecting the landing of the drone body 1. When in use, the structure can be quickly separated from the drone body 1 through the quick-release mechanism 2, which is convenient for users to assemble, use, disassemble, transport or maintain. When the drone body 1 is spraying, the width adjustment frame 3 can change the distance between the two spray pipes 5, thereby adapting to the distance between adjacent climbing crops, while the angle offset base 4 can change the tilt angle of the spray pipe 5, so that the spray pipe 5 adapts to the climbing crops and improves the spraying efficiency. The width adjustment frame 3 includes a transverse frame 9, a double-acting screw 10, and two sliding blocks 11. The transverse frame 9 is connected to the transverse frame 9. The double-acting screw 10 is arranged along the extension direction of the transverse frame 9. The double-acting screw 10 is rotatably connected to the transverse frame 9 through a shaft frame 13. Two sliding grooves 12 are symmetrically opened on the transverse frame 9, extending axially along the double-acting screw 10. The two sliding blocks 11 are slidably connected to the two sliding grooves 12 respectively. The two sliding blocks 11 are symmetrically arranged at both ends of the double-acting screw 10 and are threadedly connected to the double-acting screw 10. The quick-installation mechanism 2 includes a mounting plate 14, a connecting plate 15, and mounting components; wherein, the mounting plate 14 is detachably connected to the bottom of the UAV body 1 by bolts, the connecting plate 15 is located between the horizontal frame 9 and the mounting plate 14, and the mounting components are disposed on the connecting plate 15 and are used to fix the mounting plate 14 and the horizontal frame 9 to form an integrated structure. The mounting components include wedge blocks 16, push blocks 17, sliding rods 18, sliding sleeves 19, a double-acting screw 20, and a handwheel 21. The double-acting screw 20 is rotatably connected to the connecting plate 15. Two push blocks 17 are provided, each with a wedge block 16 on its sidewall facing the mounting plate 14 and the transverse frame 9. The two push blocks 17 are symmetrically connected to both ends of the double-acting screw 20 and threadedly connected to it. The connecting plate 15 has openings on both sidewalls near the mounting plate 14 and the transverse frame 9. A through mounting hole 1 is provided, and through mounting holes 2 are provided on the side wall of the mounting plate 14 and the transverse frame 9 near the connecting plate 15. The mounting hole 1 and the mounting hole 2 correspond to each other and are suitable for the wedge block 16 to pass through. The sliding rod 18 is set along the axis of the double-acting screw 20 and is fixedly connected to the connecting plate 15. The sliding sleeve 19 is fixedly connected to the push block 17 and is slidably connected to the sliding rod 18. One end of the double-acting screw 20 extends to the outside of the connecting plate 15 and is coaxially connected to the handwheel 21. During assembly, the mounting plate 14 is first pre-fixed to the bottom frame of the UAV with bolts. Then, the two sides of the connecting plate 15 are respectively attached to the mating surfaces of the mounting plate 14 and the transverse frame 9, so that mounting hole one and mounting hole two are completely coaxially aligned. Subsequently, the operator rotates the handwheel 21, which drives the double-acting screw 20 to rotate coaxially. Through the threaded transmission between the double-acting screw 20 and the push block 17, and with the linear guidance of the sliding rod 18 and the sliding sleeve 19, the two push blocks 17 are driven to move synchronously towards each other along the axis of the double-acting screw 20, thereby driving the wedge blocks to be inserted synchronously into the aligned mounting holes one and two. The wedge-shaped blocks wedge together the mounting plate 14, connecting plate 15, and transverse frame 9, securing them together for quick assembly. For disassembly, rotating the handwheel 21 in the opposite direction will rotate the double-acting screw 20 in the opposite direction, causing the two push blocks 17 to move synchronously in opposite directions. This will allow the wedge to be completely removed from the mounting hole, quickly separating the connecting plate 15 from the mounting plate 14 and transverse frame 9, thus completing the overall disassembly of the device. No additional tools are required; the entire machine can be quickly assembled and disassembled simply by rotating the handwheel 21, significantly improving the assembly efficiency, transport portability, and ease of maintenance. The mobile drive assembly includes a motor mounting plate 23, a driven gear 22, a driving gear 24, and a drive motor 68. The motor mounting plate 23 is connected to the transverse frame 9. The driven gear 22 is coaxially connected to the double-acting lead screw 10. The driving gear 24 is rotatably connected to the motor mounting plate 23 via a drive shaft 25. The driving gear 24 meshes with the driven gear 22. The drive motor 68 is mounted on the motor mounting plate 23, and its output end is connected to the drive shaft 25. The drive motor 68 is electrically connected to the controller. Before or during spraying operations, operators can remotely send width adjustment commands from the ground. After receiving the commands, the controller starts the drive motor 68, which drives the active gear 24 to rotate. Through gear meshing, the driven gear 22 and the bidirectional lead screw 10 rotate synchronously. When the bidirectional lead screw 10 rotates, through the transmission action of the reverse threads at both ends, and in conjunction with the linear guidance of the sliding groove 12, it drives the two sliding blocks 11 to move synchronously towards or away from each other along the sliding groove 12. This, in turn, drives the two sets of angle offset bases 4 and spray pipes 5 fixed on the sliding blocks 11 to move synchronously, realizing the lateral spacing adjustment between the two spray pipes 5. The bidirectional lead screw synchronous transmission structure can realize the synchronous symmetrical adjustment of the two spray pipes 5 with high adjustment accuracy, ensuring symmetrical load on both sides during the flight of the UAV and avoiding the impact of center of gravity shift on flight stability.

[0026] The angle offset base 4 includes a fixed plate 26, a deflection shaft 27, and a deflection column 28; wherein, the fixed plate 26 is connected to the corresponding sliding block 11, the deflection shaft 27 is rotatably connected to the fixed plate 26, and the deflection column 28 is coaxially connected to the deflection shaft 27. The angle drive assembly includes a second drive motor 29, a worm gear 30, a worm wheel 31, and a motor mounting box 32. The worm wheel 31 meshes with the worm gear 30. The motor mounting box 32 is fixedly connected to the fixed plate 26. The worm wheel 31 is coaxially connected to the deflection shaft 27. The worm gear 30 is rotatably connected to the inner wall of the motor mounting box 32. The second drive motor 29 is mounted on the motor mounting box 32. The output end of the second drive motor 29 is connected to the worm gear 30, and the second drive motor 29 is electrically connected to the controller. During spraying operations, operators can send angle adjustment commands from the ground end according to the crop height and longitudinal canopy distribution. After receiving the command, the controller controls the start of drive motor 29. Drive motor 29 drives worm gear 30 to rotate coaxially. Through the meshing transmission of worm wheel 31 and worm gear 30, worm wheel 31 and deflection shaft 27 rotate synchronously. Then, through deflection column 28, the locking mechanism and spray pipe 5 are deflected along the vertical plane, realizing the spraying angle adjustment of spray pipe 5. The worm wheel 31 and worm gear 30 transmission structure has a reverse self-locking characteristic. When drive motor 29 stops running, the angle of deflection shaft 27 can be locked by the self-locking force of worm wheel 31 and worm gear 30, which prevents the spray pipe 5 from deflecting due to flight vibration and wind resistance, ensuring the stability and accuracy of spraying angle. In addition, the independent angle drive components on both sides can adjust the deflection angle of spray pipe 5 on both sides separately, adapting to the differentiated operation needs of crops with different heights on both sides and irregular planting scenarios. The locking mechanism includes a locking tube 34, a fixed water guide tube 35, a rotating water guide tube 36, a rotary joint 37, a stabilizing tube 38, a connecting plate 39, and a rotating wheel 40. The locking tube 34 is connected to the deflection column 28. The fixed water guide tube 35 is fixedly connected inside the locking tube 34. The rotating water guide tube 36 is rotatably connected to the inner wall of the locking tube 34, and the output end of the fixed water guide tube 35 and the input end of the rotating water guide tube 36 are connected via the rotary joint 37. The stabilizing tube 38 is connected to the locking tube 34 via the connecting plate 39, and the stabilizing tube 38 and the locking tube 34 are coaxially arranged, forming a rotational gap between them. The rotating water guide pipe 36 has a threaded part 42 at the end away from the fixed water guide pipe 35, and the rotating water guide pipe 36 is rotatably connected to the stabilizing pipe 38. The rotating wheel 40 is located at the rotation interval position and is coaxially connected to the outer wall of the rotating water guide pipe 36. The inner wall of the stabilizing pipe 38 away from the rotating water guide pipe 36 has an inlet groove 44 along its axial direction. One end of the spray pipe 5 has a threaded part 43 that can be threadedly connected to the threaded part 42, and the outer wall has an inlet protrusion 45 that can slide with the inlet groove 44. The outer wall of the spray pipe 5 near the threaded part 43 has an elastic ring 41, which is in contact with the end of the rotating water guide pipe 36. When it is necessary to install the spray pipe 5 on the locking pipe 34, the end of the spray pipe 5 is coaxially inserted into the stabilizing pipe 38, the guide protrusion 45 is inserted into the corresponding guide groove 44, and the second threaded part 43 on the end of the spray pipe 5 will mate with the first threaded part 42 on the rotating water guide pipe 36. Then, the rotating water guide pipe 36 is rotated by the rotating wheel 40, and the first threaded part 42 and the second threaded part 43 on the rotating water guide pipe 36 are threadedly connected, thereby driving the spray pipe 5 to move axially towards the position of the rotating water guide pipe 36 until the first threaded part 42 and the second threaded part 43 are tightened. At this time, the elastic ring 41 is compressed, increasing the sealing between the first threaded part 42 and the second threaded part 43. When disassembling the spray pipe 5, the rotating wheel 40 is rotated in the opposite direction, driving the rotating water guide pipe 36 to rotate in the opposite direction. The first threaded part 42 and the second threaded part 43 are disengaged through the thread transmission, and the spray pipe 5 can be pulled out from the stabilizing pipe 38 to complete the disassembly. The spray pipe 5 in this device adopts a threaded locking and guide limit docking structure. The spray pipe 5 can be quickly installed and removed by simply rotating the rotating wheel 40 without the need for additional tools. It is easy to operate and facilitates the replacement of spray pipes 5 with different lengths and nozzle specifications to meet different operational needs.

[0027] An air supply plate 46 corresponding to the water outlet pipe 7 is installed along the axis of the spray pipe 5. An installation shell 47 is fixedly connected to the air supply plate 46. A fan body 48 is installed inside the installation shell 47. Ventilation holes 49 that allow airflow are opened at both ends of the installation shell 47. The output end of the fan body 48 is in the same direction as the output end of the water outlet pipe 7. A protective plate 50 is provided on the side of the spray pipe 5 away from the water outlet pipe 7. The protective plate 50 is fixedly connected to the stabilizing pipe 38. During pesticide spraying, the controller synchronously starts all fan bodies 48, which generate high-speed directional airflow. The airflow is sprayed out at high speed along the output direction of the water outlet pipe 7, forming a co-directional entrainment with the atomized pesticide droplets from the nozzle of the water outlet pipe 7. The high-speed airflow can drive the atomized pesticide droplets to penetrate the gaps in the leaves of the crop canopy and reach the hidden target areas such as the back of the leaves, the inner side of the vines, and the base of the fruit ears in the middle and lower parts of the crop canopy. At the same time, it can reduce the air drift of the pesticide droplets, improve the adhesion rate and utilization rate of the pesticide. The co-directional airflow design of the air supply plate 46 and the fan body 48 can form a wind-driven spraying effect, which greatly improves the penetration of the pesticide droplets. It solves the problem that the pesticide cannot reach the middle and lower target areas due to the shading of the canopy of climbing crops, significantly reduces the spraying blind spots, and improves the plant protection operation effect. A suspension 51 is fixedly connected to the bottom of the transverse frame 9. A fixed frame 6 is assembled on the suspension 51. The fixed frame 6 includes a U-shaped bracket 52, a connecting bracket 53, a fixed baffle 54, and a movable baffle 55. At least two brackets 52 are provided. Two adjacent brackets 52 are connected by a connecting bracket 53. The fixed baffle 54 is fixedly connected to one of the brackets 52 on one side. The movable baffle 55 is hinged to the bracket 52 on the other side. The movable end of the movable baffle 55 is fixed to the corresponding bracket 52 by a snap-fit ​​assembly. The buckle assembly includes a buckle box 56, a fixed pin block 57, a movable pin block 58, a pull rod 59, a telescopic spring 60, and a blocking plate 61. The buckle box 56 is fixedly connected to the corresponding bracket 52, the fixed pin block 57 is fixedly connected to the movable end of the movable blocking plate 55, a through groove 62 is provided on the upper side wall of the buckle box 56 for the fixed pin block 57 to pass through, the pull rod 59 is slidably connected to the buckle box 56, the movable pin block 58 is fixedly connected to the end of the pull rod 59, the two ends of the telescopic spring 60 are respectively connected to the inner wall of the buckle box 56 and the movable pin block 58, and the blocking plate 61 is connected to the pull rod 59 and is in contact with the outer wall of the buckle box 56. When installing the water tank 67, pull the lever 59, causing the movable pin 58 to compress the telescopic spring 60 and retract into the inner cavity of the snap-fit ​​box 56, fully opening the passage through the slot 62. Then, flip the movable baffle 55 to open it, placing the water tank 67 into the bracket 52 of the fixed frame 6, so that one end of the water tank 67 abuts against the fixed baffle 54. Then, flip the movable baffle 55 in the opposite direction, inserting the fixed pin 57 at its movable end into the passage slot 62 of the snap-fit ​​box 56. During the insertion of the fixed pin 57, the movable pin 58 is pressed against the slot 62 of the snap-fit ​​box 56. The guide slope of 8 pushes the movable pin 58 to automatically retract. When the fixed pin 57 is fully inserted, the telescopic spring 60 rebounds and pushes the movable pin 58 to reset, forming a reverse clamping limit on the fixed pin 57, and firmly locking the movable baffle 55, thus completing the quick fixing of the water tank 67. When removing the water tank 67, simply pull the pull rod 59 outward to drive the movable pin 58 to retract, release the limit on the fixed pin 57, and then flip open the movable baffle 55 to quickly remove the water tank 67 for adding chemicals, cleaning, or maintenance. Two water supply components are provided, each corresponding to one of the two spray pipes 5. The water supply components include a water pipe connector 63, a first telescopic water pipe 64, a second telescopic water pipe 65, and a water pump 66. The water pipe connector 63 is installed on the water tank 67, and the input end of the water pipe connector 63 extends into the water tank 67. The water pump 66 is installed on the suspension 51. The output end of the first telescopic water pipe 64 is connected to the input end of the water pump 66. The input end of the first telescopic water pipe 64 is movably connected to the output end of the water pipe connector 63. The input end of the second telescopic water pipe 65 is connected to the output end of the water pump 66. The output end of the second telescopic water pipe 65 is connected to the inside of the fixed water guide pipe 35. During spraying operations, the controller starts the water pump 66. The water pump 66 draws the pesticide solution from the water tank 67 through the first telescopic water pipe 64. After being pressurized, it is transported to the fixed water guide pipe 35 through the second telescopic water pipe 65, and then enters the inner cavity of the spray pipe 5 through the rotary joint 37 and the rotary water guide pipe 36. Finally, it is atomized and sprayed out through the atomizing nozzles of each water outlet pipe 7 to achieve continuous pesticide spraying. The operator can remotely control the output power of the water pump 66 from the ground and adjust the spray flow rate and pressure of the pesticide solution to adapt to the operational needs of different crops and different pest and disease control. Telescopic water pipe 64 and telescopic water pipe 65 can adaptively extend and deform according to the spacing and angle of the spray pipe 5, avoiding pipe blockage and cracking caused by pipe pulling and bending, ensuring the continuity of liquid supply. The design of independent water supply components on both sides can independently control the spraying start and stop and flow rate of the spray pipes 5 on both sides, adapting to the needs of single-sided operation and differentiated spraying, reducing liquid waste. The use of telescopic water pipes can adapt to changes in the position and angle of the spray pipe 5, eliminating the risk of pipe bending and pulling, and ensuring the reliability of the liquid supply system.

[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A liquid spraying device for a drone, comprising a drone body (1), a controller arranged on the drone body (1), wherein the controller is provided with a remote operation module and a power supply module, characterized in that, Also includes: A quick-installation mechanism (2) is located at the bottom of the main body (1) of the UAV; The width adjustment bracket (3) is installed on the bottom of the UAV body (1) via the quick-installation mechanism (2); Angle offset bases (4) are provided in two and symmetrically connected to the width adjustment frame (3). Angle offset bases (4) are provided with angle drive components for angle offset of their movable ends. The width adjustment frame (3) is provided with a movement drive component for driving the two angle offset bases (4) to move synchronously towards each other along their set direction. The spray pipe (5) has one end connected to the movable end of the angle offset base (4) through a locking mechanism. Several water outlet pipes (7) are provided on the spray pipe (5) along its axis. The output direction of the water outlet pipes (7) is perpendicular to the axis of the spray pipe (5). A fixed frame (6) is provided, and a water tank (67) is provided at the bottom of the drone body (1), and the water tank (67) is fixed inside the fixed frame (6); A water supply assembly is used to deliver the liquid medicine in the water tank (67) to the input end of the spray pipe (5).

2. The liquid spraying device for a drone according to claim 1, characterized in that, The width adjustment frame (3) includes a transverse frame (9), a two-way lead screw (10), and two sliding blocks (11); wherein, the two-way lead screw (10) is arranged along the extension direction of the transverse frame (9), and the two-way lead screw (10) is rotatably connected to the transverse frame (9) through a shaft frame (13). Two sliding grooves (12) extending axially along the two-way lead screw (10) are symmetrically opened on the transverse frame (9). The two sliding blocks (11) are slidably connected to the two sliding grooves (12) respectively, and the two sliding blocks (11) are symmetrically arranged at both ends of the two-way lead screw (10) and threadedly connected to the two-way lead screw (10).

3. A liquid spraying device for a drone according to claim 2, characterized in that, The quick-installation mechanism (2) includes a mounting plate (14), a connecting plate (15), and mounting components; wherein, the mounting plate (14) is detachably connected to the bottom of the UAV body (1) by bolts, and the connecting plate (15) is located between the horizontal frame (9) and the mounting plate (14), and is used to fix the mounting plate (14) and the horizontal frame (9) to form an integral structure; The mounting components include a wedge block (16), a push block (17), a sliding rod (18), a sliding sleeve (19), a double-acting screw (20), and a handwheel (21); wherein, the double-acting screw (20) is rotatably connected to the connecting plate (15), and there are two push blocks (17). The wedge block (16) is provided on the side wall of the two push blocks (17) facing the mounting plate (14) and the transverse frame (9). The two push blocks (17) are symmetrically connected to the two ends of the double-acting screw (20) and threadedly connected to the double-acting screw (20). The connecting plate (15) is close to the two side walls of the mounting plate (14) and the transverse frame (9). Each of the mounting plates (14) and the transverse frame (9) has a through mounting hole 1 on one side. The mounting plate (14) and the transverse frame (9) have through mounting holes 2 on the side wall near the connecting plate (15). The mounting holes 1 and 2 correspond to each other and are suitable for the wedge block (16) to pass through. The sliding rod (18) is set along the axis of the double-acting screw 1 (20) and is fixedly connected to the connecting plate (15). The sliding sleeve (19) is fixedly connected to the push block (17) and is slidably connected to the sliding rod (18). One end of the double-acting screw 1 (20) extends to the outside of the connecting plate (15) and is coaxially connected to the handwheel (21).

4. A liquid spraying device for a drone according to claim 3, characterized in that, The mobile drive assembly includes a motor mounting plate (23), a driven gear (22), a driving gear (24), and a drive motor (68); wherein the motor mounting plate (23) is connected to the transverse frame (9), the driven gear (22) is coaxially connected to the double-acting lead screw (10), the driving gear (24) is rotatably connected to the motor mounting plate (23) via the drive shaft (25), the driving gear (24) meshes with the driven gear (22), the drive motor (68) is mounted on the motor mounting plate (23), and the output end of the drive motor (68) is connected to the drive shaft (25), and the drive motor (68) is electrically connected to the controller.

5. A liquid spraying device for a drone according to claim 3, characterized in that, The angle offset base (4) includes a fixed plate (26), a deflection shaft (27), and a deflection column (28); wherein the fixed plate (26) is connected to the corresponding sliding block (11), the deflection shaft (27) is rotatably connected to the fixed plate (26), and the deflection column (28) is coaxially connected to the deflection shaft (27).

6. A liquid spraying device for a drone according to claim 5, characterized in that, The angle drive assembly includes a second drive motor (29), a worm (30), a worm wheel (31), and a motor mounting box (32); wherein the worm wheel (31) meshes with the worm (30), the motor mounting box (32) is fixedly connected to the fixing plate (26), the worm wheel (31) is coaxially connected to the deflection shaft (27), the worm (30) is rotatably connected to the inner wall of the motor mounting box (32), the second drive motor (29) is mounted on the motor mounting box (32), the output end of the second drive motor (29) is connected to the worm (30), and the second drive motor (29) is electrically connected to the controller.

7. A liquid spraying device for a drone according to claim 5, characterized in that, The locking mechanism includes a locking tube (34), a fixed water guide tube (35), a rotating water guide tube (36), a rotating joint (37), a stabilizing tube (38), a connecting plate (39), and a rotating wheel (40); wherein, the locking tube (34) is connected to the deflection column (28), the fixed water guide tube (35) is fixedly connected inside the locking tube (34), the rotating water guide tube (36) is rotatably connected to the inner wall of the locking tube (34), and the output end of the fixed water guide tube (35) and the input end of the rotating water guide tube (36) are connected through the rotating joint (37); the stabilizing tube (38) is connected to the locking tube (34) through the connecting plate (39), and the stabilizing tube (38) and the locking tube (34) are coaxially arranged, and a rotational interval is formed between the stabilizing tube (38) and the locking tube (34); The rotating water guide pipe (36) has a threaded part (42) inside the end away from the fixed water guide pipe (35), and the rotating water guide pipe (36) is rotatably connected to the stabilizing pipe (38). The rotating wheel (40) is located at the rotation interval position, and the rotating wheel (40) is coaxially connected to the outer wall of the rotating water guide pipe (36). The inner wall of the stabilizing pipe (38) away from the rotating water guide pipe (36) has an inlet groove (44) along its axial direction. One end of the spray pipe (5) has a threaded part (43) that can be threadedly connected to the threaded part (42), and the outer wall has an inlet protrusion (45) that can slide with the inlet groove (44). The outer wall of the spray pipe (5) near the threaded part (43) has an elastic ring (41), and the elastic ring (41) is in contact with the end of the rotating water guide pipe (36).

8. A liquid spraying device for a drone according to claim 1, characterized in that, The spray pipe (5) is equipped with an air supply plate (46) that corresponds to the water outlet pipe (7) along its axis. The air supply plate (46) is fixedly connected to an installation shell (47). The installation shell (47) is equipped with a fan body (48). Both ends of the installation shell (47) are provided with ventilation holes (49) that allow airflow. The output end of the fan body (48) is in the same direction as the output end of the water outlet pipe (7). The spray pipe (5) is provided with a protective plate (50) on the side away from the water outlet pipe (7), and the protective plate (50) is fixedly connected to the stabilizing pipe (38).

9. A liquid spraying device for a drone according to claim 3, characterized in that, The bottom of the transverse frame (9) is fixedly connected to a suspension (51), and the fixed frame (6) is assembled on the suspension (51). The fixed frame (6) includes a U-shaped bracket (52), a connecting bracket (53), a fixed baffle (54), and a movable baffle (55). Among them, at least two brackets (52) are provided, and two adjacent brackets (52) are connected to each other through the connecting bracket (53). The fixed baffle (54) is fixedly connected to one of the brackets (52) on one side, and the movable baffle (55) is hinged to the other bracket (52). The movable end of the movable baffle (55) is fixed to the corresponding bracket (52) through a buckle assembly. The buckle assembly includes a buckle box (56), a fixed pin (57), a movable pin (58), a pull rod (59), a telescopic spring (60), and a stop plate (61); wherein, the buckle box (56) is fixedly connected to the corresponding bracket (52), the fixed pin (57) is fixedly connected to the movable end of the movable stop plate (55), a through groove (62) is provided on the upper side wall of the buckle box (56) for the fixed pin (57) to pass through, the pull rod (59) is slidably connected to the buckle box (56), the movable pin (58) is fixedly connected to the end of the pull rod (59), the two ends of the telescopic spring (60) are respectively connected to the inner wall of the buckle box (56) and the movable pin (58), the stop plate (61) is connected to the pull rod (59), and the stop plate (61) is in movable contact with the outer wall of the buckle box (56).

10. A liquid spraying device for an unmanned aerial vehicle according to claim 7, characterized in that, Two water supply components are provided, each corresponding to one of the two spray pipes (5). The water supply components include a water pipe connector (63), a first telescopic water pipe (64), a second telescopic water pipe (65), and a water pump (66). The water pipe connector (63) is installed on the water tank (67), and the input end of the water pipe connector (63) extends into the water tank 67. The water pump (66) is installed on the suspension (51). The output end of the first telescopic water pipe (64) is connected to the input end of the water pump (66). The input end of the first telescopic water pipe (64) is movably connected to the output end of the water pipe connector (63). The input end of the second telescopic water pipe (65) is connected to the output end of the water pump (66). The output end of the second telescopic water pipe (65) is connected to the inside of the fixed water guide pipe (35).

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