Plant protection unmanned aerial vehicle

Abstract

The invention belongs to the technical field of unmanned aerial vehicles, and discloses a plant protection unmanned aerial vehicle which comprises a vehicle body, a support and a mounting frame, a pesticide box is fixedly mounted in the mounting frame, multiple sets of guide columns are fixedly mounted on the inner wall of the pesticide box, and multiple sets of fixing grooves are longitudinally formed in the outer surfaces of the guide columns at equal intervals; the outer surface of the guide column is movably sleeved with a sealing plate, and the sealing plate abuts against the inner wall of the medicament box in a sealed mode. According to the plant protection unmanned aerial vehicle, the interior of the pesticide box is redesigned, when pesticide liquid is contained in the pesticide box and the device is started or stopped, the clamping columns and the moving rings can move relative to the guide columns under the inertia effect, the clamping columns are clamped into the fixing grooves, and at the moment, the bottom of the sealing plate covers the surface of the pesticide liquid, so that the pesticide liquid is prevented from falling off; the flow of the liquid medicine is actually limited in a rigid form, so that the liquid medicine is prevented from generating resistance due to flow inertia, and the electric energy consumption of the device is effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of unmanned aerial vehicles, and in particular to a plant protection unmanned aerial vehicle. Background Art

[0002] In the agricultural field, with the development of drone technology and the reduction of costs, farmland pesticide spraying has been completely replaced by plant protection drones. With their reasonable hovering time and portable operation, plant protection drones have greatly improved production efficiency. At present, when plant protection drones are spraying pesticides, special pesticide boxes are installed at the bottom of the body for spraying operations. However, the horizontal movement of plant protection drones after taking off has caused some power loss problems. Since the liquid in the pesticide box is fluid and is generally not filled (as the spraying work progresses, the amount of liquid in the pesticide box will gradually decrease), When the plant protection UAV accelerates (from starting to uniform motion) or decelerates (from uniform motion to stationary hovering) in the horizontal direction, the liquid inside the pesticide tank will continue to flow in the direction of its movement under the action of inertia, or flow to the side opposite to the direction of movement in the starting stage, and produce a large travel resistance or starting resistance to the pesticide tank. In this way, the plant protection UAV needs to increase the torque and speed of the rotor to offset this part of the resistance, which greatly increases the power consumption of the UAV and reduces the flight time of the UAV. Therefore, a new type of plant protection UAV is urgently needed to solve the above problems. Summary of the invention

[0003] The present application proposes a plant protection drone to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a plant protection drone, comprising a body, a bracket and a mounting frame, a medicine box is fixedly installed inside the mounting frame, a plurality of guide columns are fixedly installed on the inner wall of the medicine box, a plurality of fixing grooves are longitudinally equidistantly provided on the outer surface of the guide column, a sealing plate is movably sleeved on the outer surface of the guide column, the sealing plate is sealingly abutted against the inner wall of the medicine box, a fixing ring located on the outer side of the guide column is fixedly installed on the top of the sealing plate, a supporting groove is provided inside the fixing ring, a moving ring is movably sleeved on the inner wall of the supporting groove, a plurality of clamping columns are fixedly connected to the inner ring surface of the moving ring, a spring is elastically connected between the moving ring and the supporting groove, a medicine replenishing tube and a sealing plug are fixedly connected to the top of the medicine box, an air pressure balance port is provided on the outer surface of the medicine replenishing tube, a liquid inlet pipe is fixedly connected to the right side of the top of the inner wall of the medicine box, and the liquid inlet pipe is adapted to pass through the bottom of the sealing plate.

[0005] As a preferred solution of the present invention, a sealing ring three is fixedly connected to the top of the inner wall of the liquid inlet pipe, a supporting column is fixedly connected to the bottom of the sealing ring three, a sealing block is movably sleeved on the outer surface of the supporting column, a diameter value of the sealing block is larger than the inner diameter value of the sealing ring three and smaller than the outer diameter value of the sealing ring three, the sealing plug is sealingly sleeved on the top of the medicine replenishing pipe, a liquid inlet is opened on the top of the medicine box, and the liquid inlet is connected to the liquid inlet pipe.

[0006] As a preferred solution of the present invention, the top of the liquid inlet pipe is connected to the medicine replenishing pipe, the top opening of the liquid inlet pipe is an open trumpet shape, and the distance between the bottom opening of the liquid inlet pipe and the bottom of the inner wall of the medicine box is greater than 0.

[0007] As a preferred solution of the present invention, a sealing ring 2 and a sealing ring 1 are fixedly mounted on the upper and lower sides of the sealing plate in sequence, and both the sealing ring 1 and the sealing ring 2 are sealingly sleeved on the outer surface of the guide column.

[0008] As a preferred solution of the present invention, the axial cross-section of the fixing groove is in a "U" shape, and the clamping column is matched with the inner wall of the fixing groove.

[0009] As a preferred solution of the present invention, the springs are arranged in four groups and are equidistantly distributed on the inner wall of the support groove in a circumferential manner.

[0010] As a preferred solution of the present invention, the end of the clamping column facing the guide column is hemispherical, and the clamping columns are arranged in eight groups and are equidistantly distributed on the inner surface of the moving ring.

[0011] As a preferred solution of the present invention, the axial cross-section of the moving ring is in a "U" shape, and the bottom of the moving ring is in limited contact with the bottom of the supporting groove.

[0012] The beneficial effects of the present invention are as follows: 1. The plant protection drone provided in the present application has redesigned the interior of the medicine box, which greatly reduces the resistance of the flow of medicine liquid to the starting or stopping of the device. A guide column is provided in the medicine box to provide a vertical guiding effect for the sealing plate. The sealing plate is sealed against the inner wall of the medicine box, so that the medicine liquid in the medicine box can provide buoyancy support for the sealing plate, and the liquid level of the medicine liquid is reflected by the sealing plate. A fixing ring is provided at the top of the sealing plate to provide limiting support for the moving ring and the clamping column. In the inner wall of the support groove, the moving ring is elastically limited by four sets of springs. , so that the ends of the multiple groups of clamping columns located on the inner ring surface of the moving ring can be stuck in the fixed grooves opened on the outer surface of the guide column. At this time, the clamping columns in the fixed grooves cannot move up and down due to the limiting effect, thereby limiting the vertical movement of the sealing plate. When the medicine box is filled with liquid medicine and the device starts or stops, the clamping columns and the moving ring will produce relative movement with the guide column under the action of inertia, and the clamping columns will be stuck in the fixed grooves. At this time, the bottom of the sealing plate covers the surface of the liquid medicine, which actually limits the flow of the liquid medicine in a rigid form, thereby avoiding the resistance of the liquid medicine due to flow inertia, and effectively reducing the power consumption of the device.

[0013] 2. The device also redesigns the dosing module. The liquid inlet pipe fixedly connected to the top of the inner wall of the medicine box is connected to the medicine replenishing pipe to provide a flow channel for the medicine liquid. The outer surface of the liquid inlet pipe is slidably sleeved with the sealing plate. An air pressure balance port is opened on the top of the outer surface of the medicine replenishing pipe to provide the air pressure balance required for the negative pressure in the inner cavity of the liquid inlet pipe and the medicine replenishing pipe when the medicine liquid is pumped out. The sealing block located on the top of the inner wall of the liquid inlet pipe is then used to automatically sense the liquid level of the medicine liquid in the liquid inlet pipe, and moves synchronously with the rise of the liquid level to the position of abutting and sealing with the sealing ring three. At this time, it means that the medicine liquid is full, which greatly improves the practicality of the device.

[0014] 3. In addition, the device uses springs to provide elastic tension to the moving ring and the clamping column. Since the liquid in the plant protection UAV will only roll under the action of inertia when it moves horizontally with acceleration or decelerates to hover, it is necessary to ensure that the sealing plate can move up and down freely at any time except the above-mentioned situation. By providing multiple sets of springs on the inner wall of the support groove, the moving ring and the clamping column due to inertial movement are elastically pulled back, so that the UAV forces the moving ring and the clamping column to automatically reset without acceleration or deceleration, so that the clamping column is no longer stuck in the fixed groove, thereby ensuring the normal up and down movement of the sealing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0016] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 It is a front perspective schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the separation of the guide column, the fixing groove, the first sealing ring, the second sealing ring and the fixing ring of the present invention; Figure 3 It is a schematic diagram of the front appearance of the overall structure of the present invention; Figure 4 It is a front cutaway schematic diagram of the overall structure of the present invention; Figure 5 It is a side cutaway schematic diagram of the medicine box of the present invention; Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at center A; Figure 7 It is a schematic diagram of the internal separation of the medicine box of the present invention; Figure 8 It is a schematic diagram of the internal section of the medicine box of the present invention; Fig. 9 For the present invention Figure 8 A magnified schematic diagram of the structure at B in the figure.

[0017] In the figure: 1. body; 2. bracket; 3. mounting frame; 4. medicine box; 5. guide column; 6. fixing groove; 7. sealing plate; 8. sealing ring 1; 9. sealing ring 2; 10. fixing ring; 11. liquid inlet pipe; 12. medicine replenishing pipe; 13. sealing plug; 14. supporting groove; 15. moving ring; 16. clamping column; 17. spring; 18. air pressure balance port; 19. liquid inlet; 20. sealing ring 3; 21. supporting column; 22. sealing block. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] Please refer to the figure Figures 1 to 9As shown, an embodiment of the present invention provides a plant protection drone, including a body 1, a bracket 2 and a mounting frame 3, wherein a medicine box 4 is fixedly installed inside the mounting frame 3, a plurality of guide columns 5 are fixedly installed on the inner wall of the medicine box 4, a plurality of fixing grooves 6 are longitudinally and equidistantly provided on the outer surface of the guide column 5, a sealing plate 7 is movably sleeved on the outer surface of the guide column 5, the sealing plate 7 is sealed and abutted against the inner wall of the medicine box 4, a fixing ring 10 located outside the guide column 5 is fixedly installed on the top of the sealing plate 7, a supporting groove 14 is provided inside the fixing ring 10, a moving ring 15 is movably sleeved on the inner wall of the supporting groove 14, a plurality of clamping columns 16 are fixedly connected to the inner ring surface of the moving ring 15, a spring 17 is elastically connected between the moving ring 15 and the supporting groove 14, a medicine replenishing tube 12 and a sealing plug 13 are fixedly connected to the top of the medicine box 4, an air pressure balance port 18 is provided on the outer surface of the medicine replenishing tube 12, a liquid inlet pipe 11 is fixedly connected to the right side of the top of the inner wall of the medicine box 4, and the liquid inlet pipe 11 is adapted to penetrate to the bottom of the sealing plate 7; The plant protection UAV has redesigned the interior of the medicine box 4, which greatly reduces the resistance of the flow of the medicine liquid to the start or stop of the device. By providing a guide column 5 located in the medicine box 4, a vertical guiding effect is provided for the sealing plate 7. The sealing plate 7 is sealed against the inner wall of the medicine box 4, so that the medicine liquid in the medicine box 4 can provide buoyancy support for the sealing plate 7, and the liquid level of the medicine liquid is reflected by the sealing plate 7. By providing a fixing ring 10 located on the top of the sealing plate 7, a limiting support is provided for the moving ring 15 and the clamping column 16. In the inner wall of the support groove 14, the moving ring 15 is elastically limited by four groups of springs 17, so that the position The ends of the multiple groups of clamping columns 16 on the inner ring surface of the moving ring 15 can be inserted into the fixed groove 6 opened on the outer surface of the guide column 5. At this time, the clamping column 16 cannot move up and down due to the limiting effect of the fixed groove 6, thereby limiting the vertical movement of the sealing plate 7. When the medicine box 4 is filled with liquid medicine and the device starts or stops, the clamping column 16 and the moving ring 15 will produce relative movement with the guide column 5 under the action of inertia, and make the clamping column 16 inserted into the fixed groove 6. At this time, the bottom of the sealing plate 7 covers the surface of the liquid medicine, which actually limits the flow of the liquid medicine in a rigid form, thereby avoiding the resistance of the liquid medicine due to flow inertia, and effectively reducing the power consumption of the device.

[0020] In addition, the device uses a spring 17 to provide elastic tension to the moving ring 15 and the clamping column 16. Since the liquid medicine in the plant protection UAV will only roll under the action of inertia when it moves horizontally with acceleration or decelerates to hover, it is necessary to ensure that the sealing plate 7 can move up and down freely at any time except the above-mentioned situation. By providing multiple sets of springs 17 on the inner wall of the support groove 14, the moving ring 15 and the clamping column 16 due to inertial movement are elastically pulled back, so that the UAV forces the moving ring 15 and the clamping column 16 to automatically reset without accelerating or decelerating, so that the clamping column 16 is no longer stuck in the fixed groove 6, thereby ensuring the normal up and down movement of the sealing plate 7.

[0021] Among them, the top of the inner wall of the liquid inlet pipe 11 is fixedly connected with a sealing ring 3 20, the bottom of the sealing ring 3 20 is fixedly connected with a support column 21, the outer surface of the support column 21 is movably sleeved with a sealing block 22, the diameter value of the sealing block 22 is greater than the inner diameter value of the sealing ring 3 20, and smaller than the outer diameter value of the sealing ring 3 20, the sealing plug 13 is sealingly sleeved on the top of the replenishing medicine pipe 12, and the top of the medicine box 4 is provided with a liquid inlet 19, and the liquid inlet 19 is connected to the liquid inlet pipe 11; The device also redesigns the dosing module, and connects the liquid inlet pipe 11 fixedly connected to the top of the inner wall of the medicine box 4 with the replenishing medicine pipe 12 to provide a flow channel for the liquid medicine. The outer surface of the liquid inlet pipe 11 is slidably connected with the sealing plate 7, and an air pressure balance port 18 is opened on the top of the outer surface of the replenishing medicine pipe 12 to provide the air pressure balance required for the negative pressure for the inner cavity of the liquid inlet pipe 11 and the replenishing medicine pipe 12 when the liquid medicine is pumped out. The sealing block 22 located on the top of the inner wall of the liquid inlet pipe 11 automatically senses the liquid level of the liquid medicine in the liquid inlet pipe 11, and moves synchronously with the rising liquid level to a position where it abuts and seals with the sealing ring 3 20. At this time, it means that the liquid medicine is full, which greatly improves the practicality of the device.

[0022] The top of the liquid inlet pipe 11 is connected to the medicine replenishing pipe 12, the top opening of the liquid inlet pipe 11 is in the shape of an open trumpet, and the distance between the bottom opening of the liquid inlet pipe 11 and the bottom of the inner wall of the medicine box 4 is greater than 0; The top of the liquid inlet pipe 11 is in an open trumpet shape, which can effectively receive the supplementary liquid medicine from the supplementary medicine pipe 12, and a gap needs to be left between the bottom opening of the liquid inlet pipe 11 and the medicine box 4, so that the liquid medicine can enter the inner cavity of the medicine box 4.

[0023] Among them, the upper and lower sides of the sealing plate 7 are fixedly installed with a sealing ring 2 9 and a sealing ring 1 8 in sequence, and the sealing ring 1 8 and the sealing ring 2 9 are both sealed and sleeved on the outer surface of the guide column 5; Since a plurality of sets of fixing grooves 6 are longitudinally equidistantly provided on the outer surface of the guide column 5, a sealing function cannot be achieved by a single set of sealing plates 7. Sealing ring 2 9 and sealing ring 1 8 are respectively installed on the upper and lower sides of the sealing plate 7 to seal the plurality of sets of fixing grooves 6 on the outer surface of the guide column 5 and prevent the drug solution from flowing through the fixing grooves 6 to the top of the sealing plate 7.

[0024] The axial cross-section of the fixing groove 6 is in a "U" shape, and the clamping column 16 is adapted to the inner wall of the fixing groove 6; The "U"-shaped fixing groove 6 allows the end of the card column 16 to be smoothly inserted into it, so that the sealing plate 7 cannot drive the card column 16 to move freely in the vertical direction, thereby achieving the purpose of limiting the movement of the sealing plate 7, and the upper and lower sides of the inner wall of the fixing groove 6 are horizontally distributed to prevent the spherical design of the end of the card column 16 from detaching from the inner wall of the fixing groove 6.

[0025] The springs 17 are arranged in four groups and are equidistantly distributed on the inner wall of the support groove 14 in a circular pattern; The springs 17 are arranged in four groups, which pull the moving ring 15 from four directions of the outer ring surface of the moving ring 15, so that the axis of the moving ring 15 is colinear with the axis of the guide column 5, and the end of the clamping column 16 does not get stuck in the inner wall of the fixing groove 6 when moving at a uniform speed, so as to facilitate the free up and down movement of the sealing plate 7.

[0026] The end of the clamping column 16 facing the guide column 5 is hemispherical, and the clamping columns 16 are arranged in eight groups and are equidistantly distributed on the inner surface of the moving ring 15; The end of the clamping column 16 can be smoothly clamped into the inner wall of the fixing groove 6 and fit therewith, thereby assisting in limiting the up and down movement of the sealing plate 7 .

[0027] The axial cross-section of the movement ring 15 is in a "U" shape, and the bottom of the movement ring 15 is in limited contact with the bottom of the support groove 14; The moving ring 15 needs to move freely in all directions on the inner wall of the support groove 14, and the spring 17 provides elastic tension limitation. The moving ring 15 is supported against the inner wall of the support groove 14. When the device starts or stops, the inertia generated will cause the moving ring 15 to move horizontally along the inner wall of the support groove 14, and the movement direction is its original movement direction.

[0028] Working principle: When the device is used, the sealing plug 13 is first opened, and the spraying liquid is introduced into the top opening of the medicine replenishing tube 12. Figure 8 As shown, the liquid medicine will flow into the inner cavity of the medicine box 4 along the medicine replenishing pipe 12 and the liquid inlet pipe 11, and gradually raise the liquid level of the liquid medicine. The liquid medicine will push the sealing plate 7 upward, so that the sealing plate 7 is closely attached to the liquid level of the liquid medicine. When the liquid medicine in the liquid inlet pipe 11 is filled, the liquid medicine moving upward will push the sealing block 22 upward, so that the sealing block 22 abuts against the bottom of the sealing ring 20, and form a seal, and the filling is completed; Then, the machine body 1 is started, and the medicine box 4 is driven upward to the hovering height. When the machine body 1 starts to move in the forward direction, the moving ring 15 will overcome the pulling force of the spring 17 under the action of inertia, and move relative to the outer surface of the guide column 5. At this time, the end of the clamping column 16 will be stuck in the fixed groove 6 and limit the sealing plate 7. At the same time, the medicine liquid in the medicine box 4 rolls toward the side opposite to the forward direction of the machine body 1 under the action of inertia, and exerts a force on the sealing plate 7. At this time, the sealing plate 7 is subjected to an upward thrust, but because the clamping column 16 is stuck in the fixed groove 6, the sealing plate 7 will not move upward, thereby limiting the movement space of the medicine liquid in the inner cavity of the medicine box 4, making the medicine liquid a whole with poor flow, and will not generate the inertial thrust of tumbling flow, thereby reducing the resistance of the machine body 1 at the start; Finally, when the body 1 moves at a constant speed, the movement speed inside the medicine box 4 is consistent. After the body 1 completes a spraying task, it needs to stop moving. At this time, the moving ring 15 and the clamping column 16 continue to move along the movement direction under the action of inertia, and the end of the clamping column 16 is stuck in the fixed groove 6 to limit the vertical movement of the sealing plate 7. The sealing plate 7 limits the movement of the entire medicine solution downward to maintain stability.

Claims

1. A plant protection drone, comprising a body (1), a bracket (2) and a mounting frame (3), wherein a medicine box (4) is fixedly mounted inside the mounting frame (3), and characterized in that: The inner wall of the medicine box (4) is fixedly mounted with a plurality of guide columns (5), and the outer surface of the guide column (5) is longitudinally equidistantly provided with a plurality of fixing grooves (6), and the outer surface of the guide column (5) is movably sleeved with a sealing plate (7), and the sealing plate (7) is in sealing contact with the inner wall of the medicine box (4), and a fixing ring (10) located outside the guide column (5) is fixedly mounted on the top of the sealing plate (7), and a supporting groove (14) is provided inside the fixing ring (10), and the inner wall of the supporting groove (14) is movably sleeved with a A moving ring (15), the inner ring surface of which is fixedly connected to a plurality of groups of clamping columns (16), a spring (17) being elastically connected between the moving ring (15) and the supporting groove (14), a medicine replenishing tube (12) and a sealing plug (13) being fixedly connected to the top of the medicine box (4), an air pressure balance port (18) being provided on the outer surface of the medicine replenishing tube (12), a liquid inlet tube (11) being fixedly connected to the right side of the top of the inner wall of the medicine box (4), and the liquid inlet tube (11) being adapted to penetrate to the bottom of the sealing plate (7).

2. The plant protection drone according to claim 1, characterized in that: The top of the inner wall of the liquid inlet pipe (11) is fixedly connected to a sealing ring three (20), the bottom of the sealing ring three (20) is fixedly connected to a support column (21), the outer surface of the support column (21) is movably sleeved with a sealing block (22), the diameter of the sealing block (22) is greater than the inner diameter of the sealing ring three (20) and smaller than the outer diameter of the sealing ring three (20), the sealing plug (13) is sealingly sleeved on the top of the medicine replenishing pipe (12), and the top of the medicine box (4) is provided with a liquid inlet (19), and the liquid inlet (19) is connected to the liquid inlet pipe (11).

3. The plant protection drone according to claim 2, characterized in that: The top of the liquid inlet pipe (11) is connected to the medicine replenishing pipe (12), the top opening of the liquid inlet pipe (11) is in the shape of an open trumpet, and the distance between the bottom opening of the liquid inlet pipe (11) and the bottom of the inner wall of the medicine box (4) is greater than 0.

4. The plant protection drone according to claim 3, characterized in that: A second sealing ring (9) and a first sealing ring (8) are fixedly mounted on the upper and lower sides of the sealing plate (7) in sequence, and both the first sealing ring (8) and the second sealing ring (9) are sealingly sleeved on the outer surface of the guide column (5).

5. The plant protection drone according to claim 4, characterized in that: The axial cross-section of the fixing groove (6) is in a "U" shape, and the clamping column (16) is adapted to the inner wall of the fixing groove (6).

6. The plant protection drone according to claim 5, characterized in that: The springs (17) are arranged in four groups and are equidistantly distributed on the inner wall of the support groove (14) in a circumferential manner.

7. The plant protection drone according to claim 6, characterized in that: One end of the clamping column (16) facing the guide column (5) is hemispherical, and the clamping columns (16) are arranged in eight groups and are equidistantly distributed on the inner annular surface of the moving ring (15) in a circumferential manner.

8. The plant protection drone according to claim 7, characterized in that: The axial cross-section of the movement ring (15) is in a "U" shape, and the bottom of the movement ring (15) is in limited contact with the bottom of the support groove (14).

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