Rotary spraying type plant protection unmanned aerial vehicle

Abstract

The invention discloses a rotary spraying type plant protection unmanned aerial vehicle which comprises a vehicle body, a plurality of vehicle arms are arranged on the periphery of the vehicle body outwards, a brushless motor is installed at the free end of each vehicle arm, a rotor wing is installed at the upper end of each brushless motor, a liquid storage tank is arranged at the lower end of the vehicle body, and a booster pump is installed at the lower end of the vehicle body. The inlet end of the booster pump communicates with the lower end of the liquid storage tank; a movable groove with the upper end and the lower end opened is inwards formed in one side of the liquid storage tank, a connecting pipe is rotationally connected to the lower end of the machine body in the movable groove, the connecting pipe communicates with the outlet end of the booster pump through a liquid conveying hose, and an electric telescopic rod is rotationally connected to the lower end of the machine body between the movable groove and the connecting pipe; the free end of the connecting pipe is detachably connected with an extension pipe communicated with the connecting pipe, and the free end of the extension pipe is communicated with a spraying nozzle. The novel extended spraying design is adopted, damage of flying airflow to crops can be effectively reduced, and the device is suitable for pesticide spraying of fragile crops.

Description

Technical Field

[0001] The present invention relates to the technical field of plant protection unmanned aerial vehicles, and particularly to a rotary spraying type plant protection unmanned aerial vehicle. Background Art

[0002] Under the background of the development of modern agriculture, in order to improve crop yield and quality and reduce the harm of pests and diseases to crops, plant protection technology has made great progress. Traditional agricultural plant protection methods, such as manual backpack sprayers, tractor-mounted spray booms, etc., although meeting the needs of agricultural production to a certain extent, have problems such as low operation efficiency, high labor intensity, serious waste of liquid medicine, and are difficult to operate effectively under complex terrain conditions. With the progress of technology, especially the development of unmanned aerial vehicle technology, a new type of efficient plant protection means - plant protection unmanned aerial vehicle has emerged.

[0003] Plant protection unmanned aerial vehicles adopt advanced flight control systems and navigation technologies, and can achieve functions such as precise positioning, autonomous route planning, and automatic obstacle avoidance. Compared with traditional plant protection methods, unmanned aerial vehicle plant protection has significant advantages: it can quickly respond to changes in agricultural conditions and carry out prevention and control work in a timely manner; through a high-precision GPS positioning system, precise spraying of pesticides can be achieved, greatly reducing the waste of liquid medicine; moreover, for areas such as mountains and hilly areas that are difficult for traditional machinery to reach, unmanned aerial vehicles can easily handle them, greatly improving the operation efficiency and coverage. In addition, due to flexible operation, unmanned aerial vehicles can complete large-area plant protection tasks in a short time, not only saving labor costs but also reducing the risk of personnel contacting pesticides.

[0004] However, when facing some relatively fragile crops, when performing the task of spraying pesticides, due to the strong downward airflow generated by the rotors of the unmanned aerial vehicle, it is easy to cause some fragile crops to lodge, and even cause the phenomenon of leaf breakage (such as tobacco leaves, etc.). This situation not only affects the normal growth of crops but also reduces the final yield and quality, bringing economic losses to farmers, making the plant protection unmanned aerial vehicle not suitable for the pesticide spraying of such crops. Summary of the Invention

[0005] The purpose of the present invention is to provide a rotary spraying type plant protection unmanned aerial vehicle, which adopts a brand-new extended spraying design, can effectively reduce the damage of flight airflow to crops, and is suitable for the pesticide spraying of relatively fragile crops.

[0006] The above technical object of the present invention is achieved through the following technical solutions: A rotary spray type plant protection unmanned aerial vehicle, comprising a fuselage, a detachable battery and an integrated circuit board are arranged inside the fuselage, a plurality of arms are arranged outward around the fuselage, a brushless motor electrically connected to the integrated circuit board is installed at the free end of each arm, a rotor is installed at the upper end of each brushless motor, a liquid storage tank is arranged at the lower end of the fuselage, a liquid filling port is arranged at the upper end of the liquid storage tank, the liquid filling port is detachably connected with a sealing cover, a booster pump electrically connected to the integrated circuit board is installed at the lower end of the fuselage, and the inlet end of the booster pump is communicated with the lower end of the liquid storage tank;

[0007] An activity groove with openings at both the upper and lower ends is inwardly formed on one side of the liquid storage tank, a connecting pipe capable of vertically rotating is rotatably connected in the activity groove at the lower end of the fuselage, the connecting pipe is communicated with the outlet end of the booster pump through an infusion hose, an electric telescopic rod electrically connected to the integrated circuit board is rotatably connected between the connecting pipe and the fuselage at the lower end in the activity groove, the free end of the connecting pipe is detachably connected with an extension pipe communicated therewith, the free end of the extension pipe is communicated with a flexible corrugated pipe, the free end of the flexible corrugated pipe is communicated with a spray nozzle, and the weight of the spray nozzle enables it to maintain a vertical downward state.

[0008] By adopting the above technical solutions, when crop pesticides need to be sprayed, the prepared pesticides are added into the liquid storage tank, the electric telescopic rod pulls the connecting pipe to rotate to the horizontal position, and the extension pipe is connected to the connecting pipe; at this time, the plant protection unmanned aerial vehicle can be controlled to take off. When the plant protection unmanned aerial vehicle takes off to an appropriate height, the electric telescopic rod pulls the connecting pipe to rotate to an inclined or vertically downward position, and then spraying can be carried out downward. When spraying pesticides, the booster pump pressurizes and pumps the pesticides in the liquid storage tank into the connecting pipe, and then sprays out from the spray nozzle along the extension pipe and the flexible corrugated pipe, and finally sprays downward onto the surface of the crops. Through the extended spraying of the extension pipe, the unmanned aerial vehicle can be farther away from the crops, and the damage to the crops caused by the airflow generated by the unmanned aerial vehicle can be effectively reduced.

[0009] A further setting of the present invention is that: an installation groove for placing the booster pump is inwardly formed on one side of the liquid storage tank.

[0010] A further setting of the present invention is that: a pipe passing groove for the infusion hose to pass through is upwardly formed at the bottom of the liquid storage tank.

[0011] A further setting of the present invention is that: a threaded connection sleeve with internal threads is rotatably connected to the free end of the connecting pipe, and a threaded connection pipe threadedly connected to the threaded connection sleeve is connected to the end of the extension pipe away from the spray nozzle.

[0012] A further setting of the present invention is that: a plurality of obstacle avoidance sensors electrically connected to the integrated circuit board are arranged on the outer side of the fuselage.

[0013] A further setting of the present invention is that: two fixed landing gears are provided at the lower end of the fuselage.

[0014] A further setting of the present invention is that: the extension pipe is made of aluminum alloy material.

[0015] In summary, the present invention has the following beneficial effects: The plant protection drone of the present invention is provided with a rotatable extension pipe, and pesticides are sprayed through the spray nozzle at the lower end of the extension pipe, enabling the drone to operate at a higher altitude. The downward airflow generated when the drone flies becomes very small after reaching the crops, which can effectively reduce the damage to the crops caused by the flying airflow. At the same time, spraying from the lower end of the extension pipe will not cause the atomized pesticides to disperse around due to the airflow, and more precise spraying can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 for showing the booster pump in the installation groove;

[0018] Figure 3 for showing the connecting pipe and the electric telescopic rod in the movable groove;

[0019] Figure 4 for showing the overall structure of the liquid storage tank;

[0020] Figure 5 for showing the connection between the connecting pipe and the extension pipe.

[0021] In the figure: 1, fuselage; 11, battery; 12, arm; 13, brushless motor; 14, rotor; 15, obstacle avoidance sensor; 16, fixed landing gear; 2, liquid storage tank; 21, liquid filling port; 22, sealing cover; 23, installation groove; 24, movable groove; 25, pipe passing groove; 3, booster pump; 4, connecting pipe; 41, infusion hose; 42, threaded connection sleeve; 5, electric telescopic rod; 6, extension pipe; 61, threaded connection pipe; 62, flexible bellows; 63, spray nozzle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0024] In addition, terms such as "horizontal" and "vertical" do not require the components to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0025] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] Example, refer to Figures 1-5 , a rotary spraying plant protection UAV, including a body 1. A detachable battery 11 and an integrated circuit board (not shown) are provided inside the body 1. Four arms 12 are provided outward around the body 1. A brushless motor 13 electrically connected to the integrated circuit board is installed at the free end of each arm 12. Two rotors 14 are installed at the upper end of each brushless motor 13. Three obstacle avoidance sensors 15 electrically connected to the integrated circuit board are provided on the front side of the body 1, including two lidars and a millimeter wave radar. Two fixed landing gears 16 are provided at the lower end of the body 1. A liquid storage tank 2 is provided at the lower end of the body 1. A liquid filling port 21 is provided outward at the upper end of one side of the liquid storage tank 2. A sealing cover 22 is detachably connected to the liquid filling port 21. An installation groove 23 is opened inward on the front side of the liquid storage tank 2. A booster pump 3 electrically connected to the integrated circuit board is installed in the installation groove 23 at the lower end of the body 1. The inlet end of the booster pump 3 is communicated with the lower end of the liquid storage tank 2.

[0027] An activity groove 24 with openings at both the upper and lower ends is opened inward on the rear side of the liquid storage tank 2. A connecting pipe 4 that can rotate vertically is rotatably connected in the activity groove 24 at the lower end of the body 1. The connecting pipe 4 is communicated with the outlet end of the booster pump 3 through an infusion hose 41. A pipe passing groove 25 for the infusion hose 41 to pass through is opened upward at the bottom of the liquid storage tank 2. An electric telescopic rod 5 electrically connected to the integrated circuit board is rotatably connected between the connecting pipe 4 in the activity groove 24 at the lower end of the body 1. The connecting pipe 4 is driven to rotate upward or downward by the telescopic movement of the electric telescopic rod 5.

[0028] The free end of the connecting pipe 4 is detachably connected to an extension pipe 6 communicating therewith. The extension pipe 6 is made of aluminum alloy material, making it higher in strength and lighter, and more convenient for the electric telescopic rod 5 to drive its rotation. The free end of the connecting pipe 4 is rotatably connected to a threaded connection sleeve 42 with internal threads. One end of the extension pipe 6 far from the spray nozzle 63 is connected with a threaded connection pipe 61 threadedly connected to the threaded connection sleeve 42. The free end of the extension pipe 6 is communicated with a flexible bellows 62. The free end of the flexible bellows 62 is communicated with a spray nozzle 63. The weight of the spray nozzle 63 enables it to keep vertically downward, which is convenient for spraying vertically downward when adjusting the inclination of the extension pipe 6.

[0029] Working principle: When crop pesticide spraying is required, the prepared pesticide is added into the liquid storage tank 2. The electric telescopic rod 5 pulls the connecting pipe 4 to rotate to the horizontal position and connects the extension pipe 6 to the connecting pipe 4. At this time, the plant protection unmanned aerial vehicle can be controlled to take off. When the plant protection unmanned aerial vehicle takes off to an appropriate height, the electric telescopic rod 5 pulls the connecting pipe 4 to rotate to an inclined or vertically downward position, and then spraying can be carried out downward. When spraying pesticides, the booster pump 3 pressurizes and pumps the pesticides in the liquid storage tank 2 into the connecting pipe 4, and then sprays out from the spray nozzle 63 along the extension pipe 6 and the flexible bellows 62, and finally sprays downward onto the surface of the crops. Through the extended spraying of the extension pipe 6, the unmanned aerial vehicle can be farther away from the crops, and the damage to the crops caused by the airflow generated by the unmanned aerial vehicle can be effectively reduced.

[0030] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make modifications without creative contributions to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A rotary spraying plant protection drone, comprising a body (1), characterized in that: The machine body (1) is provided with a detachable battery (11) and an integrated circuit board. A plurality of machine arms (12) are provided outwardly around the machine body (1). A brushless motor (13) electrically connected to the integrated circuit board is installed at the free end of each machine arm (12). A rotor (14) is installed at the upper end of each brushless motor (13). A liquid storage tank (2) is provided at the lower end of the machine body (1). A liquid filling port (21) is provided at the upper end of the liquid storage tank (2). A sealing cover (22) is detachably connected to the liquid filling port (21). A booster pump (3) electrically connected to the integrated circuit board is installed at the lower end of the machine body (1). The inlet end of the booster pump (3) is connected to the lower end of the liquid storage tank (2). A movable groove (24) with openings at both ends is provided inwardly on one side of the liquid storage box (2); the lower end of the body (1) is rotatably connected to a connecting pipe (4) capable of vertical rotation in the movable groove (24); the connecting pipe (4) is connected to the outlet end of the booster pump (3) through an infusion hose (41); the lower end of the body (1) is rotatably connected to an electric telescopic rod (5) electrically connected to the integrated circuit board between the connecting pipe (4) in the movable groove (24); the free end of the connecting pipe (4) is detachably connected to an extension pipe (6) connected thereto; the free end of the extension pipe (6) is connected to a flexible bellows (62); the free end of the flexible bellows (62) is connected to a spray nozzle (63); the weight of the spray nozzle (63) enables it to remain vertically downward.

2. The rotary spraying plant protection drone according to claim 1, characterized in that: A mounting groove (23) for accommodating the booster pump (3) is provided inwardly on one side of the liquid storage box (2).

3. The rotary spraying plant protection drone according to claim 1, characterized in that: The bottom of the liquid storage box (2) is provided with a tube groove (25) upwardly opened for the infusion hose (41) to pass through.

4. The rotary spraying plant protection drone according to claim 1, characterized in that: The free end of the connecting pipe (4) is rotatably connected to a threaded connecting sleeve (42) with internal threads, and the end of the extension pipe (6) away from the spray nozzle (63) is connected to a threaded connecting pipe (61) threadedly connected to the threaded connecting sleeve (42).

5. The rotary spraying plant protection drone according to claim 1, characterized in that: A plurality of obstacle avoidance sensors (15) electrically connected to the integrated circuit board are arranged on the outer side of the machine body (1).

6. The rotary spraying plant protection drone according to claim 1, characterized in that: Two fixed landing gears (16) are arranged at the lower end of the machine body (1).

7. The rotary spraying plant protection drone according to claim 1, characterized in that: The extension tube (6) is made of aluminum alloy.

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