Unmanned aerial vehicle variable pesticide application device based on centrifugal pesticide box

Abstract

The utility model belongs to the technical field of agricultural engineering, and particularly relates to an unmanned aerial vehicle variable pesticide applying device based on a centrifugal pesticide box. A pesticide storage box is mounted at the bottom of the unmanned aerial vehicle body; a direct-current brush motor is mounted at the bottom of the pesticide storage box; the output end of the direct-current brush motor is fixedly connected with a rotating shaft, and the rotating shaft is rotationally arranged in the middle of the pesticide storage box; stirring fan blades are fixedly connected to the middle part of the rotating shaft, and the stirring fan blades are positioned in the pesticide storage box; under the action of a direct-current brush motor, the rotating speed of the pesticide storage box can be adjusted according to different concentrations of pesticides, and the problem that the pesticide concentration in the pesticide storage box is too high, so that liquid drops are not uniform in size when being discharged from a spray head of the unmanned aerial vehicle main body is solved; mixing of water discharged from the inner wall of a liquid discharging hole and pesticide can be accelerated, and under the action of a first elastic rope, the two sets of baffles can be pulled inwards to be reset, and the operation is repeated in sequence.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural engineering technology, specifically a variable-rate spraying device for drones based on a centrifugal medicine box. Background Technology

[0002] Centrifugal sprayers can be used in agriculture for precise application, efficient atomization, and automated operation. They are usually used in conjunction with drones, sprayers, and other equipment for spraying pesticides, fertilizers, or plant growth regulators.

[0003] When in use, drone spraying equipment collects crop health data through multispectral cameras or infrared sensors, and at the same time uses a centrifugal disc to generate centrifugal force to atomize the pesticide into tiny droplets, which are then discharged from a nozzle on one side of the wing, thereby performing variable-rate spraying and other tasks.

[0004] Through long-term observation, it has been found that in the use of existing drug application devices, some water in the liquid inside the device evaporates or the drug precipitates, which increases the viscosity of the liquid in the tank and causes uneven droplet size. Therefore, a UAV variable displacement drug application device based on a centrifugal drug tank is proposed to address the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model proposes a drone variable drug delivery device based on a centrifugal medicine box.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The variable-rate spraying device for drones based on centrifugal medicine tank of this utility model includes a drone body; a medicine storage tank is installed at the bottom of the drone body; a DC brushed motor is installed at the bottom of the medicine storage tank; a rotating shaft is fixedly connected to the output end of the DC brushed motor, and the rotating shaft is rotatably arranged in the middle of the medicine storage tank; a stirring fan blade is fixedly connected to the middle of the rotating shaft, and the stirring fan blade is located inside the medicine storage tank; a liquid storage tank is fixedly connected to the top of the medicine storage tank; a cover plate is installed in the middle of the liquid storage tank; a connector is fixedly connected to the top of the rotating shaft, and the connector is rotatably arranged on the inner wall of the liquid storage tank; two sets of baffles are slidably connected to the inner wall of the connector; a first elastic rope is fixedly connected to the inner wall of the two sets of baffles; two sets of drainage holes are opened on the bottom wall of the liquid storage tank, and the drainage holes are connected to the medicine storage tank.

[0007] Preferably, multiple sets of connecting frames are fixed to the side wall of the stirring fan blade; a second elastic rope is fixed to the inner wall of the connecting frame; a piston is fixed to the end of the second elastic rope, and the piston is slidably disposed on the inner wall of the connecting frame; a connecting rod is fixed to the middle of the piston, and the connecting rod is U-shaped; a scraper is fixed to the outer wall of the connecting rod, and the scraper is disposed close to the bottom wall of the medicine storage tank.

[0008] Preferably, a reinforcing frame is fixed to the bottom wall of the liquid storage tank; multiple sets of support frames are fixed to the bottom of the reinforcing frame; a tray is fixed to the end of the support frame; multiple sets of guide tubes are fixed to the middle of the tray, and the tray and the guide tubes are connected.

[0009] Preferably, the side walls of the two sets of baffles are fixedly connected to elastic pads; the inner walls of the elastic pads are fixedly connected to multiple sets of limiting frames.

[0010] Preferably, a convex plate is fixed to the inner wall of the tray, and the convex plate is inclined in the middle; a guide groove is formed in the middle of the convex plate.

[0011] Preferably, a counterweight is fixed to the end of the connecting rod.

[0012] The beneficial effects of this utility model are:

[0013] This utility model provides a variable-speed pesticide application device for drones based on a centrifugal pesticide tank. Under the action of a DC brushed motor, the rotation speed can be adjusted according to the different concentrations of pesticides, reducing the problem of uneven droplet size when the pesticide concentration in the storage tank is too high and is discharged from the nozzle of the drone body. Under the action of unfolding stirring blades, the mixing between water and pesticide discharged from the inner wall of the drain hole can be accelerated. Under the action of the first elastic rope, the two sets of baffles can be pulled inward and reset, and the process can be repeated.

[0014] This utility model provides a variable-rate spraying device for drones based on a centrifugal medicine tank. By using a scraper, it can change the position of some of the medicine residue after contacting the bottom wall of the medicine tank, thereby improving the accuracy of mixing with the liquid in the medicine tank. Under the action of the second elastic rope, the working position of the scraper can be changed according to the rotation speed of the stirring fan blade, thereby increasing the area of ​​medicine residue on the bottom wall of the medicine tank that can be processed. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the medicine storage box structure in this utility model;

[0018] Figure 3 for Figure 2 Enlarged view of point A;

[0019] Figure 4 This is a schematic diagram of the stirring fan blade structure in this utility model;

[0020] Figure 5 This is a schematic diagram of the connecting frame structure in this utility model.

[0021] Legend:

[0022] 1. UAV body; 11. Medicine tank; 12. DC brushed motor; 13. Rotary shaft; 14. Stirring blade; 15. Liquid storage tank; 16. Cover plate; 17. Connector; 18. Baffle; 19. First elastic rope; 110. Drain hole; 2. Connecting frame; 21. Second elastic rope; 22. Piston; 23. Connecting rod; 24. Scraper; 3. Reinforcing frame; 31. Support frame; 32. Tray; 33. Flow guide tube; 4. Elastic pad; 41. Limiting frame; 5. Protruding plate; 51. Guide groove; 6. Counterweight. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Specific implementation examples are given below.

[0025] like Figure 1-5As shown, a variable-rate spraying device for drones based on a centrifugal medicine tank includes a drone body 1; a medicine storage tank 11 is installed at the bottom of the drone body 1; a DC brushed motor 12 is installed at the bottom of the medicine storage tank 11; a rotating shaft 13 is fixedly connected to the output end of the DC brushed motor 12, and the rotating shaft 13 is rotatably arranged in the middle of the medicine storage tank 11; a stirring blade 14 is fixedly connected to the middle of the rotating shaft 13, and the stirring blade 14 is located inside the medicine storage tank 11; a liquid storage tank 15 is fixedly connected to the top of the medicine storage tank 11; a cover plate 16 is installed in the middle of the liquid storage tank 15; a connector 17 is fixedly connected to the top of the rotating shaft 13, and the connector 17 is located in the liquid storage tank 15. 5. The inner wall is designed for rotation; two sets of baffles 18 are slidably connected to the inner wall of the connector 17; a first elastic rope 19 is fixedly connected to the inner wall of the two sets of baffles 18; two sets of drain holes 110 are provided on the bottom wall of the liquid storage tank 15, and the drain holes 110 are connected to the storage tank 11; during operation, after the operator installs the storage tank 11 on the bottom of the drone body 1, an appropriate amount of pesticide is injected into the storage tank 11, so that the pesticide is lower than the bottom wall of the liquid storage tank 15. When the drone body 1 is in flight, the operator can simultaneously start the DC brushed motor 12 switch, which works in conjunction with the rotating shaft 13 and the stirring fan blades 14 in the middle. The pesticide inside the storage tank 11 is stirred. Simultaneously, the connecting piece 17, under the action of centrifugal force, can swing the two sets of baffles 18 to both sides, sealing the expanded drain hole 110. As the pesticide concentration in the storage tank 11 gradually increases, the resistance generated by the stirring blades 14 during rotation increases synchronously. Due to the characteristics of the DC brushed motor 12, the greater the rotational resistance, the lower its rotational speed. After the connecting piece 17 reduces its speed, under the action of the first elastic rope 19, the two sets of baffles 18 can be pulled towards the connecting piece 17, allowing the drain hole 110 to leak out. This allows the pesticide stored in the storage tank 15 to flow into the pesticide storage tank 11. Under the action of the stirring blades 14, the water and pesticide are mixed. This step is achieved by the DC brushed motor 12, whose rotation speed can be adjusted according to the pesticide concentration to reduce the problem of uneven droplet size when the pesticide is discharged from the nozzle of the drone body 1 due to excessively high pesticide concentration in the storage tank 11. Under the action of the unfolding stirring blades 14, the mixing between the water and pesticide discharged from the inner wall of the drain hole 110 can be accelerated. Under the action of the first elastic rope 19, the two sets of baffles 18 can be pulled inward to reset, and this process is repeated.

[0026] like Figure 1-5As shown, multiple sets of connecting frames 2 are fixed to the side wall of the stirring blade 14; a second elastic rope 21 is fixed to the inner wall of the connecting frame 2; a piston 22 is fixed to the end of the second elastic rope 21, and the piston 22 is slidably disposed on the inner wall of the connecting frame 2; a connecting rod 23 is fixed to the middle of the piston 22, and the connecting rod 23 is U-shaped; a scraper 24 is fixed to the outer wall of the connecting rod 23, and the scraper 24 is disposed near the bottom wall of the storage tank 11; during operation, by setting multiple sets of connecting frames 2 on the outer wall of the stirring blade 14, and during the rotation of the stirring blade 14, under the action of centrifugal force, the connecting rod 23 can be flung outward, and the scraper 24 can simultaneously interact with the storage tank 11. The medicine tank 11 contacts the bottom wall, raising the settled medicine residue. The medicine residue is then mixed again by the stirring blades 14. When the rotation speed of the stirring blades 14 decreases, the piston 22 is pulled back and reset by the second elastic rope 21, changing the working position of the scraper 24. This step, in conjunction with the scraper 24, allows it to change the position of some of the medicine residue after contacting the bottom wall of the medicine tank 11, improving the mixing accuracy between the residue and the liquid in the medicine tank 11. Under the action of the second elastic rope 21, the working position of the scraper 24 can be changed according to the rotation speed of the stirring blades 14, thereby increasing the area of ​​the medicine residue on the bottom wall of the medicine tank 11 that is being processed.

[0027] like Figure 1-5 As shown, a reinforcing frame 3 is fixed to the bottom wall of the storage tank 15; multiple sets of support frames 31 are fixed to the bottom of the reinforcing frame 3; a tray 32 is fixed to the end of the support frame 31; multiple sets of guide cylinders 33 are fixed to the middle of the tray 32, and the tray 32 and the guide cylinders 33 are connected; during operation, by setting an unfolded tray 32 on the inner wall of the storage tank 11, when the liquid in the storage tank 11 drops by a certain amount and water is discharged from the inner wall of the drain hole 110, the falling water can be collected on the inner wall of the tray 32, and then discharged sequentially from the ends of the multiple sets of guide cylinders 33 to the inner wall area of ​​the storage tank 11. Under the action of the tray 32, the falling liquid can be collected in a concentrated manner, and the multiple sets of guide cylinders 33 can improve the uniformity of transferring the liquid to the inner wall of the storage tank 11, thereby accelerating the mixing treatment of pesticide and water.

[0028] like Figure 1-5As shown, elastic pads 4 are fixed to the side walls of the two sets of baffles 18; multiple sets of limiting frames 41 are fixed to the inner walls of the elastic pads 4; during operation, by setting elastic pads 4 at the ends of the two sets of baffles 18, when the connecting baffles 18 are separated under the action of the rotating connector 17, the elastic pads 4 can be straightened at the same time, and the position of the elastic pads 4 can be limited by the fixed limiting frames 41, so that when the baffles 18 are rotated as a whole, the unfolded elastic pads 4 can block the drainage holes 110 in part of the leakage area. This step, together with the elastically set elastic pads 4, can reduce the problem of frequent leakage of some water from the storage tank 15 after the connecting baffles 18 are unfolded, and slow down the amount of water flowing out of the storage tank 15. The limiting frames 41 can improve the stability of the contact between the elastic pads 4 and the bottom wall of the storage tank 15.

[0029] like Figure 1-5 As shown, a protruding plate 5 is fixed to the inner wall of the tray 32, and the middle part of the protruding plate 5 is inclined; a guide groove 51 is opened in the middle of the protruding plate 5; during operation, the protruding plate 5, in conjunction with the protruding plate 5, allows the liquid to fall onto the top of the protruding plate 5 and, under the action of the inclined protruding plate 5, be first diverted by the guide groove 51. This step, in conjunction with the guide groove 51, can further improve the accuracy of liquid diversion at the inner wall of the tray 32, thereby improving the uniformity of water discharge.

[0030] like Figure 1-5 As shown, a counterweight 6 is fixedly connected to the end of the connecting rod 23. During operation, the counterweight 6 is provided at the end of the connecting rod 23. When the connecting rod 23 rotates and unfolds, the counterweight 6 can increase the force generated by centrifugal force. Under the action of the counterweight 6, this step can improve the outward extension distance and stability of the connecting rod 23, thereby increasing the treatment area of ​​the scraper 24 on the bottom wall of the medicine storage tank 11.

[0031] Working principle: After installing the pesticide storage tank 11 on the bottom of the drone body 1, an appropriate amount of pesticide is injected into the storage tank 11, ensuring the pesticide level is below the bottom wall of the liquid storage tank 15. During flight, the operator can simultaneously activate the DC brushed motor 12, which, in conjunction with the rotating shaft 13 and the central stirring blades 14, stirs the pesticide inside the storage tank 11. Simultaneously, the connecting piece 17, under the centrifugal force of rotation, can swing the two sets of baffles 18 to the sides, sealing the expanded drain hole 110. As the pesticide concentration in the storage tank 11 gradually increases, the stirring blades 14 rotate... The resistance generated during the movement can increase synchronously, and due to the characteristics of the DC brushed motor 12, the rotational resistance increases and the rotational speed decreases. After the speed of the connecting piece 17 decreases, under the action of the first elastic rope 19, the two sets of baffles 18 can be pulled towards the position of the connecting piece 17, and the drain hole 110 will leak out, so that the pesticide stored in the storage tank 15 can flow into the pesticide storage tank 11. Under the action of the stirring blade 14, the water and pesticide are mixed. Multiple sets of connecting frames 2 are provided on the outer wall of the stirring blade 14. During the rotation of the stirring blade 14, under the action of centrifugal force, the connecting rod 23 can be pushed outward. The scraper 24, which is simultaneously installed, can contact the bottom wall of the medicine storage tank 11 and lift up the settled medicine residue. Combined with the stirring fan 14, the residue is further mixed and stirred. When the rotation speed of the stirring fan 14 decreases, the second elastic rope 21 pulls the piston 22 back to its original position, changing the working position of the scraper 24. Because an unfolded tray 32 is provided on the inner wall of the medicine storage tank 11, when the liquid in the medicine storage tank 11 drops to a certain amount and water is discharged from the inner wall of the drain hole 110, the falling water can be collected on the inner wall of the tray 32 and sequentially discharged from the ends of multiple sets of guide tubes 33 into the inner wall area of ​​the medicine storage tank 11. This is achieved through two sets of baffles. An elastic pad 4 is provided at the end of the connecting rod 18. When the connecting baffle 18 is separated under the action of the rotating connecting member 17, the elastic pad 4 can be straightened at the same time. The position of the elastic pad 4 can be limited by the fixed limiting frame 41. When the baffle 18 is rotated, the unfolded elastic pad 4 can block the drainage hole 110 in part of the leakage area. With the help of the convex plate 5, after the liquid falls on the top of the convex plate 5, it is first diverted by the guide groove 51 under the action of the inclined convex plate 5. By providing a counterweight 6 at the end of the connecting rod 23, the counterweight 6 can increase the force generated by centrifugal force when the connecting rod 23 is rotated and unfolded.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A variable-rate spraying device for unmanned aerial vehicles (UAVs) based on a centrifugal medicine tank, comprising a UAV body (1); a medicine storage tank (11) is installed at the bottom of the UAV body (1); characterized in that: A DC brushed motor (12) is installed at the bottom of the medicine storage tank (11); a rotating shaft (13) is fixedly connected to the output end of the DC brushed motor (12), and the rotating shaft (13) is rotatably arranged in the middle of the medicine storage tank (11); a stirring fan (14) is fixedly connected to the middle of the rotating shaft (13), and the stirring fan (14) is located inside the medicine storage tank (11); a liquid storage tank (15) is fixedly connected to the top of the medicine storage tank (11); a liquid storage tank (15) is installed in the middle of the liquid storage tank (15). The container is equipped with a cover plate (16); a connector (17) is fixedly connected to the top of the rotating shaft (13), and the connector (17) is rotatably mounted on the inner wall of the liquid storage tank (15); two sets of baffles (18) are slidably connected to the inner wall of the connector (17); a first elastic rope (19) is fixedly connected to the inner wall of the two sets of baffles (18); two sets of drain holes (110) are opened on the bottom wall of the liquid storage tank (15), and the drain holes (110) are connected to the medicine storage tank (11).

2. The UAV variable-rate dosing device based on a centrifugal medicine tank as described in claim 1, characterized in that: Multiple sets of connecting frames (2) are fixed to the side wall of the stirring fan blade (14); a second elastic rope (21) is fixed to the inner wall of the connecting frame (2); a piston (22) is fixed to the end of the second elastic rope (21), and the piston (22) is slidably arranged on the inner wall of the connecting frame (2); a connecting rod (23) is fixed to the middle of the piston (22), and the connecting rod (23) is U-shaped; a scraper (24) is fixed to the outer wall of the connecting rod (23), and the scraper (24) is arranged close to the bottom wall of the medicine storage tank (11).

3. The UAV variable-rate dosing device based on a centrifugal medicine tank as described in claim 1, characterized in that: The bottom wall of the liquid storage tank (15) is fixed with a reinforcing frame (3); the bottom of the reinforcing frame (3) is fixed with multiple sets of support frames (31); the end of the support frame (31) is fixed with a tray (32); the middle of the tray (32) is fixed with multiple sets of guide tubes (33), and the tray (32) and the guide tubes (33) are connected.

4. The UAV variable-rate dosing device based on a centrifugal medicine tank as described in claim 1, characterized in that: The side walls of the two sets of baffles (18) are fixed with elastic pads (4); the inner walls of the elastic pads (4) are fixed with multiple sets of limiting frames (41).

5. The UAV variable-rate dosing device based on a centrifugal medicine tank as described in claim 3, characterized in that: The inner wall of the tray (32) is fixed with a convex plate (5), and the middle part of the convex plate (5) is inclined; a guide groove (51) is opened in the middle part of the convex plate (5).

6. The UAV variable-rate dosing device based on a centrifugal medicine tank as described in claim 2, characterized in that: A counterweight (6) is fixed to the end of the connecting rod (23).

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