A herbicide dispensing device based on a plant protection UAV

Abstract

This application relates to the field of agricultural technology, and particularly to a herbicide dispensing device based on a plant protection unmanned aerial vehicle. It includes a liquid storage tank for storing herbicide solution. The liquid storage tank is installed on an existing plant protection unmanned aerial vehicle in a detachable manner. A quantitative liquid discharging device is provided at the bottom of the liquid storage tank for mixing clear water and herbicide in the liquid storage tank. A temporary storage tank for storing the mixed liquid is detachably installed at the bottom of the liquid storage tank, and the quantitative liquid discharging device is matched with a solution mixing device in the temporary storage tank. A spraying device communicated with the temporary storage tank is provided at the bottom of the temporary storage tank for evenly spraying the herbicide mixed liquid onto the area to be weeded. The present invention prepares multiple herbicide agents through multiple agent storage chambers so as to select a suitable herbicide agent according to different areas to be weeded. At the same time, the present invention prepares the herbicide mixed liquid in real time through the mixing of the agent and clear water, which can effectively avoid the problems of excessive or insufficient preparation of the mixed liquid.

Description

Technical Field

[0001] This application relates to the field of agricultural technologies, and particularly to a herbicide dispensing device based on a plant protection unmanned aerial vehicle (UAV). Background Art

[0002] A plant protection UAV is an unmanned aircraft used for agricultural and forestry plant protection operations. Spraying operations are achieved through ground remote control or navigation flight control. Among them, the herbicide dispensing based on a plant protection UAV utilizes the flight function of the plant protection UAV to carry a herbicide dispensing device, and then sprays the agent to achieve the purpose of weed control, reducing the operation intensity of farmers and improving production efficiency.

[0003] For example, a rice tablet herbicide dispensing device based on a plant protection UAV with the publication number CN210707902U includes a plant protection UAV, and a dispensing mechanism is carried on the plant protection UAV. The dispensing mechanism includes a top layer plate, a control layer, and a bottom layer plate. A medicine box slot is provided on the top layer plate, and a medicine box is arranged on the medicine box slot. One end of the medicine box is provided with a medicine box leak port. A top layer plate leak port is provided at a position adjacent to the medicine box leak port on the top layer plate. A dispensing track is provided below the top layer plate leak port; a motor is provided on the bottom layer plate; the control layer is provided with a single-chip microcomputer system. A movable plate that can move left and right is provided between the top layer plate and the control layer. A rack is fixed at the bottom end of the movable plate. A movable plate leak port is provided on the movable plate, and a dispensing switch is matched with the movable plate leak port. The dispensing switch is arranged at the movable plate leak port through a switch rotating shaft. Through this utility model, precise and uniform medicine application can be carried out, the efficiency of agricultural operations can be improved, and the burden of manual labor can be reduced.

[0004] The above-mentioned prior art is for dispensing and applying fixed herbicides, but currently the most commonly used is still liquid herbicides, and the above-mentioned prior art is not applicable to liquid herbicides.

[0005] In addition, regarding the use of liquid herbicides for weed control, before the liquid herbicides are dispensed and used, they need to be mixed with clean water in a certain proportion to prepare a herbicide solution, and then they can be sprayed for weed control. However, currently, the spraying devices carried on UAVs generally prepare the herbicide solution in advance and then introduce it into the spraying device to achieve the purpose of spraying. However, this method has the problem that too much herbicide solution is prepared and wasted, or too little herbicide solution is prepared, resulting in repeated preparation and introduction into the spraying device, affecting the spraying efficiency of the spraying device carried on the UAV. Summary of the Invention

[0006] A herbicide dispensing device based on a plant protection UAV provided by this application adopts the following technical solutions:

[0007] A herbicide dispensing device based on a plant protection unmanned aerial vehicle, comprising a liquid storage tank for storing herbicide solution. The liquid storage tank is detachably installed on an existing plant protection unmanned aerial vehicle. A quantitative liquid discharging device is arranged at the bottom of the liquid storage tank for mixing clear water and herbicide in the liquid storage tank. A temporary storage tank for storing the mixed liquid is detachably installed at the bottom of the liquid storage tank, and the quantitative liquid discharging device is matched with a solution mixing device in the temporary storage tank. A spraying device communicated with the temporary storage tank is arranged at the bottom of the temporary storage tank for evenly spraying the herbicide mixed liquid onto the area to be weeded.

[0008] Preferably, the liquid storage tank is an overall hollow shell structure with an open upper end. A clear water storage cavity is arranged in the middle of the liquid storage tank for storing clear water. A plurality of medicament storage cavities are uniformly arranged along the outer circumference of the clear water storage cavity inside the liquid storage tank for storing various herbicide medicaments. Top covers are detachably installed at the upper ends of the clear water storage cavity and the medicament storage cavities.

[0009] A converging slope converging from the periphery to the connection with the clear water outlet pipe is arranged at the bottom of the clear water storage cavity, and a converging slope converging from the periphery to the connection with the medicament outlet pipe is also arranged at the bottom of the medicament storage cavity.

[0010] Preferably, the quantitative liquid discharging device includes a clear water outlet pipe and a medicament outlet pipe. The clear water outlet pipe is communicated with the bottom of the liquid storage tank and is connected with the clear water storage cavity. A plurality of the medicament outlet pipes are communicated with the bottom of the liquid storage tank and are respectively connected with a plurality of medicament storage cavities. Control valves are installed on both the clear water outlet pipe and the medicament outlet pipe for controlling the flow of clear water and medicament.

[0011] Quantitative liquid discharging mechanisms are arranged on both the clear water outlet pipe and the medicament outlet pipe for controlling the liquid discharging speed of clear water and medicament.

[0012] Preferably, the quantitative liquid discharging mechanism includes a medicament quantitative ring and a clear water quantitative ring. The clear water quantitative ring is slidably sleeved on the clear water outlet pipe and the two are in sealed cooperation. The medicament quantitative ring is also slidably sleeved on the medicament outlet pipe and the two are in sealed cooperation. A plurality of clear water outlet holes and medicament outlet holes are respectively formed on the outer side walls at the bottoms of the clear water outlet pipe and the medicament outlet pipe for realizing the outflow of clear water and medicament. The upper side wall of the clear water quantitative ring is connected with a first electric push rod on the bottom wall of the liquid storage tank through a connecting block for controlling the up and down movement of the clear water quantitative ring. The upper side wall of the medicament quantitative ring is also connected with a second electric push rod on the bottom wall of the liquid storage tank through a connecting block for controlling the up and down movement of the medicament quantitative ring.

[0013] Preferably, the solution mixing device includes a confluence frame installed on the inner side wall of the temporary storage tank. The confluence frame is in the shape of a horn with an upward opening. A drainage frame is arranged inside the confluence frame, and the drainage frame is in the shape of a horn with a downward opening. A drainage gap for the flow of the mixed liquid is left between the outer side wall of the drainage frame and the inner side wall of the confluence frame;

[0014] A current-limiting frame is arranged inside the confluence frame and above the drainage frame. The current-limiting frame is also in the shape of a horn with a downward opening. A first mixing area is formed between the current-limiting frame and the drainage frame, and a second mixing area is formed between the confluence frame and the drainage frame;

[0015] The solution mixing device further includes a clear water drainage ring and a medicament drainage ring. The clear water drainage ring is sleeved on the clear water outlet pipe corresponding to the clear water outlet holes area, and the medicament drainage ring is sleeved on the medicament outlet pipe corresponding to the medicament outlet holes area. The lower ends of the clear water drainage ring and the medicament drainage ring are both connected inside the current-limiting frame and penetrate through the current-limiting frame to the first mixing area.

[0016] Preferably, a mixing mechanism for improving the mixing effect is arranged in the first mixing area and the second mixing area; the mixing mechanism includes a confluence ring. A confluence port is opened at the center of the bottom of the confluence frame. The confluence ring is installed at the lower end of the confluence port and is coaxially arranged with the drainage frame. A vertically arranged mixing rod is arranged on the inner axis of the confluence ring. The upper end of the mixing rod is connected to the drainage frame and is used to drive the drainage frame to rotate inside the confluence frame;

[0017] A plurality of mixing branches are circumferentially and uniformly extended from the mixing rod in the second mixing area. The end of the mixing branch away from the mixing rod is connected with a mixing stirring blade, and the mixing stirring blade rotates and fits on the inner side wall of the confluence frame; a plurality of mixing blades are circumferentially and uniformly arranged on the upper surface of the drainage frame, and a plurality of through holes are uniformly opened on the mixing blades; a spiral blade is arranged on the mixing rod inside the confluence ring. The lower end of the mixing rod penetrates through the bottom of the temporary storage tank and is rotatably installed on the temporary storage tank, and the lower end of the mixing rod is connected with a mixing motor, and the mixing motor is arranged in a protective shell arranged at the bottom of the temporary storage tank.

[0018] Preferably, an annular balance groove is opened on the outer side wall of the drainage frame, and a plurality of arc-shaped balance strips that are rotationally matched with the balance groove are circumferentially and uniformly arranged on the inner side wall of the confluence frame. A plurality of through holes are uniformly opened on the part of the arc-shaped balance strip located in the drainage gap.

[0019] Preferably, the spraying device includes an annular pipe. The annular pipe is installed at the bottom of the temporary storage tank through a bracket, and the annular pipe is communicated with the inside of the temporary storage tank through a branch pipe. A plurality of spray heads are circumferentially connected to the lower end of the annular pipe and are used to spray the weeding mixed liquid in the annular pipe.

[0020] Preferably, a water level quantification mechanism is arranged inside the temporary storage box for controlling the capacity of the mixed liquid temporarily stored at the bottom inside the temporary storage box; the water level quantification mechanism includes a buoyancy ring which is slidably arranged on the inner side wall of the temporary storage box, and a plurality of vertically arranged water level adjusting rods are circumferentially and uniformly connected to the upper end of the buoyancy ring. The upper ends of the water level adjusting rods slidably penetrate through the confluence frame and are slidably sleeved on an annular plate arranged above the confluence frame. The annular plate is slidably arranged on the inner side wall of the temporary storage box in the vertical direction. A plurality of linkage rods are intertwined on the annular plate, and liquid outlet controllers are arranged inside both the clear water outlet pipe and the medicament outlet pipe; and a plurality of the liquid outlet controllers are connected to the linkage rods.

[0021] The upper end part of the water level adjusting rod is of a threaded rod structure, and the threaded rod is in threaded connection with a transmission gear rotatably installed at the lower end of the annular plate. An internal gear ring meshing with the transmission gear is rotatably arranged at the lower end of the annular plate. An operation hole is formed in the side wall of the temporary storage box at the position corresponding to the annular plate, and a closing plate is installed in the operation hole in a detachable manner.

[0022] Through holes are formed in the outer side walls of the clear water outlet pipe and the medicament outlet pipe, and the linkage rods are slidably arranged in the through holes.

[0023] Preferably, the liquid outlet controller includes a plugging ring which is arranged on the inner side wall of the clear water outlet pipe and is located above the clear water outlet hole. A plugging plate is slidably arranged inside the clear water outlet pipe and below the plugging ring. A control rod is connected to the lower end of the plugging plate, and the lower end of the control rod slidably penetrates through the bottom of the clear water outlet pipe and is connected to the linkage rod. The control rod is in sealed cooperation with the bottom of the clear water outlet pipe to prevent clear water from overflowing.

[0024] Annular drainage channels are formed on the upper surface of the current-limiting frame and at the outer edges of the clear water diversion ring and the medicament diversion ring. A discharge channel is formed at the outer edge of the upper surface of the current-limiting frame. A guiding channel communicating with the discharge channel is formed on one side of the annular drainage channel facing the discharge channel, so that the clear water and the medicament in the annular drainage channel are guided into the discharge channel. A plurality of through discharge holes are circumferentially and uniformly formed in the discharge channel, so that the clear water and the medicament in the discharge channel can smoothly flow into the first mixing area through the discharge holes.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The present invention prepares a variety of weeding medicaments through multiple medicament storage cavities, so as to select a suitable weeding medicament according to different areas to be weeded; at the same time, the present invention prepares a weeding mixed liquid in real time by mixing the medicament with clear water, which can effectively avoid the problems of excessive or insufficient preparation of the mixed liquid.

[0027] 2. The quantitative liquid outlet mechanism of the present invention can control the mixing ratio of the medicament and clean water, so as to prepare a weeding mixture with a suitable concentration according to actual needs and achieve precise preparation; at the same time, through the solution mixing device of the present invention, the medicament can be evenly mixed in the clean water, so that the medicament components in the prepared mixture are evenly distributed.

[0028] 3. The water level quantitative mechanism of the present invention can control the capacity of the mixture prepared at the bottom of the temporary storage tank in real time, prevent the problem of waste caused by excessive preparation of the mixture, and achieve precise quantity control. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of the present invention.

[0030] Figure 2 is a schematic structural diagram between the liquid storage tank and the quantitative liquid outlet device of the present invention.

[0031] Figure 3 is a cross-sectional view of the liquid storage tank of the present invention.

[0032] Figure 4 is a schematic structure between the solution mixing device and the quantitative liquid outlet device of the present invention Figure 1 .

[0033] Figure 5 is a schematic structure between the solution mixing device and the quantitative liquid outlet device of the present invention Figure 2 .

[0034] Figure 6 is a schematic structural diagram between the confluence frame, the drainage frame and the flow limiting frame of the present invention.

[0035] Figure 7 is a schematic structural diagram of the mixing mechanism of the present invention.

[0036] Figure 8 is a schematic structure of the water level quantitative mechanism of the present invention Figure 1 .

[0037] Figure 9 is a schematic structure of the water level quantitative mechanism of the present invention Figure 2 .

[0038] Figure 10 is a schematic structural diagram of the liquid outlet controller of the present invention.

[0039] Figure 11 is the present invention Figure 10 partial enlarged view of part A.

[0040] Description of reference numerals in the drawings: 1. Liquid storage tank; 2. Quantitative liquid discharging device; 3. Temporary storage tank; 4. Solution mixing device; 5. Spraying device; 11. Fresh water storage chamber; 12. Herbicide storage chamber; 13. Top cover; 14. Converging slope; 21. Fresh water outlet pipe; 22. Herbicide outlet pipe; 23. Quantitative liquid discharging mechanism; 231. Herbicide quantitative ring; 232. Fresh water quantitative ring; 233. Fresh water outlet hole; 234. Herbicide outlet hole; 235. First electric push rod; 236. Second electric push rod; 41. Confluence frame; 42. Drainage frame; 43. Drainage gap; 44. Flow limiting frame; 45. First mixing area; 46. Second mixing area; 47. Fresh water drainage ring; 48. Herbicide drainage ring; 49. Mixing mechanism; 491. Confluence ring; 492. Confluence port; 493. Mixing rod; 494. Mixing strip; 495. Mixing stirring blade; 496. Mixing blade; 497. Through hole; 498. Spiral blade; 499. Mixing motor; 490. Protective shell; 421. Balance groove; 422. Arc-shaped balance strip; 423. Flow through hole; 51. Annular pipe; 52. Branch pipe; 53. Spraying head; 6. Water level quantitative mechanism; 61. Buoyancy ring; 62. Water level adjusting rod; 63. Annular plate; 64. Linking rod; 65. Liquid discharging controller; 66. Driving gear; 67. Internal gear ring; 68. Sealing plate; 69. Matching chute; 651. Sealing ring; 652. Sealing plate; 653. Control rod; 441. Annular drainage channel; 442. Discharge channel; 443. Guide channel; 444. Discharge hole. Detailed implementation manners

[0041] The following further elaborates on this application in conjunction with the attached Figure 1-11 drawings.

[0042] Embodiment 1:

[0043] An embodiment of this application discloses a herbicide dispensing device based on a plant protection unmanned aerial vehicle. Refer to Figure 1 , which includes a liquid storage tank 1 for storing herbicide solution. The liquid storage tank 1 is detachably installed on an existing plant protection unmanned aerial vehicle. A quantitative liquid discharging device 2 is provided at the bottom of the liquid storage tank 1 for mixing fresh water and herbicide in the liquid storage tank 1. A temporary storage tank 3 for storing the mixed liquid is detachably installed at the bottom of the liquid storage tank 1. The quantitative liquid discharging device 2 cooperates with a solution mixing device 4 in the temporary storage tank 3. A spraying device 5 communicating with the temporary storage tank 3 is provided at the bottom of the temporary storage tank 3 for evenly spraying the herbicide mixed liquid onto the area to be weeded.

[0044] The flight of the drone can drive the liquid storage tank 1 to fly synchronously, enabling the spraying device 5 to evenly spray the weeding mixture onto the area to be weeded, achieving automatic spraying; in the present invention, the liquid storage tank 1 can store clean water and various herbicides. When weeding is required, the appropriate herbicide and clean water are selected and conveyed to the solution mixing device 4 through the quantitative liquid discharging device 2, so as to evenly mix the clean water and the herbicide and store them in the temporary storage tank 3. Thus, the prepared weeding mixture can be sprayed onto the area to be weeded through the spraying device 5.

[0045] Refer to Figure 1-3 , the liquid storage tank 1 is an overall hollow shell structure with an open upper end, and a clean water storage cavity 11 is arranged in the middle of the liquid storage tank 1 for storing clean water. A number of medicament storage cavities 12 are evenly arranged along the outer circumference of the clean water storage cavity 11 inside the liquid storage tank 1 for storing various weeding medicaments. The upper ends of the clean water storage cavity 11 and the medicament storage cavities 12 are both detachably installed with top covers 13.

[0046] Refer to Figure 2-3 , the quantitative liquid discharging device 2 includes a clean water discharging pipe 21 and a medicament discharging pipe 22. The clean water discharging pipe 21 is connected to the bottom of the liquid storage tank 1 and communicates with the clean water storage cavity 11. A number of medicament discharging pipes 22 are connected to the bottom of the liquid storage tank 1 and respectively communicate with a number of medicament storage cavities 12. Control valves (not shown in the figure) are installed on both the clean water discharging pipe 21 and the medicament discharging pipe 22 for controlling the flow of clean water and medicament.

[0047] The control valve on the clean water discharging pipe 21 can control the clean water in the clean water storage cavity 11 to be discharged through the clean water discharging pipe 21 to the solution mixing device 4 below. At the same time, the appropriate medicament can be selected according to needs, and then the control valve on the corresponding medicament discharging pipe 22 is used to control the discharge of the medicament to the solution mixing device 4 below, so as to evenly mix the medicament and the clean water through the solution mixing device 4 to form the required weeding mixture.

[0048] In order to ensure the smooth discharge of the clean water and medicament in the clean water storage cavity 11 and the medicament storage cavities 12, in the present invention, a converging slope 14 that converges from the surrounding to the connection with the clean water discharging pipe 21 is arranged at the bottom inside the clean water storage cavity 11, and a converging slope 14 that converges from the surrounding to the connection with the medicament discharging pipe 22 is also arranged at the bottom inside the medicament storage cavity 12.

[0049] Refer to Figure 2 , quantitative liquid discharging mechanisms 23 are arranged on both the clean water discharging pipe 21 and the medicament discharging pipe 22 for controlling the liquid discharging speed of clean water and medicament;

[0050] Specifically, the quantitative liquid discharging mechanism 23 includes a medicine quantitative ring 231 and a clear water quantitative ring 232. The clear water quantitative ring 232 is slidably sleeved on the clear water outlet pipe 21, and the two are in sealed cooperation. The medicine quantitative ring 231 is also slidably sleeved on the medicine outlet pipe 22, and the two are in sealed cooperation. A plurality of clear water outlet holes 233 and medicine outlet holes 234 are respectively formed on the outer side walls of the bottom of the clear water outlet pipe 21 and the outer side walls of the bottom of the medicine outlet pipe 22 for realizing the outflow of clear water and medicine. The upper side wall of the clear water quantitative ring 232 is connected to the first electric push rod 235 on the bottom wall of the liquid storage tank 1 through a connecting block for controlling the up and down movement of the clear water quantitative ring 232. The upper side wall of the medicine quantitative ring 231 is also connected to the second electric push rod 236 on the bottom wall of the liquid storage tank 1 through a connecting block for controlling the up and down movement of the medicine quantitative ring 231.

[0051] The present invention can select an appropriate liquid discharging speed according to the mixing ratio of clear water and medicine, and then respectively control the up and down movement of the clear water quantitative ring 232 and the medicine quantitative ring 231 through the first electric push rod 235 and the second electric push rod 236, so as to control the opening and closing of the clear water outlet holes 233 and the medicine outlet holes 234 to limit the liquid discharging speed, and further achieve the purpose of quantitative liquid discharging.

[0052] After the above operations, the solution mixing device 4 will mix the selected medicine and clear water. Specifically, refer to Figure 4-6 , the solution mixing device 4 includes a confluence frame 41 installed on the inner side wall of the temporary storage tank 3. The confluence frame 41 is an upward-opening horn-shaped structure as a whole. A diversion frame 42 is arranged in the confluence frame 41, and the diversion frame 42 is a downward-opening horn-shaped structure. A diversion gap 43 for the flow of the mixed liquid is left between the outer side wall of the diversion frame 42 and the inner side wall of the confluence frame 41;

[0053] A current limiting frame 44 is arranged in the confluence frame 41 and above the diversion frame 42, and the current limiting frame 44 is also a downward-opening horn-shaped structure. A first mixing area 45 is formed between the current limiting frame 44 and the diversion frame 42, and a second mixing area 46 is formed between the confluence frame 41 and the diversion frame 42.

[0054] The medicine and clear water will first converge in the first mixing area 45, and the medicine and clear water will be preliminarily mixed through the first mixing area 45. Then the mixed liquid will flow downward along the diversion frame 42 until it flows through the diversion gap 43 into the second mixing area 46 for further thorough mixing of the mixed liquid.

[0055] The solution mixing device 4 further includes a clean water drainage ring 47 and a drug drainage ring 48. The clean water drainage ring 47 is sleeved in the clean water outlet pipe 21 in the area corresponding to the clean water outlet hole 233, and is used to guide the clean water to flow downward along the inner wall of the clean water drainage ring 47; the drug drainage ring 48 is sleeved in the area corresponding to the drug outlet hole 234 of the drug outlet pipe 22, and is used to guide the drug to flow downward along the inner wall of the drug drainage ring 48.

[0056] The lower ends of the clean water drainage ring 47 and the lower ends of the reagent drainage ring 48 are both connected to the flow limiting frame 44 and pass through the flow limiting frame 44 to the first mixing zone 45 .

[0057] After the clean water and the medicine flow out through the clean water outlet pipe 21 and the medicine outlet pipe 22 respectively, the clean water flows into the first mixing zone 45 through the clean water drainage ring 47, and the medicine flows into the second mixing zone 46 through the medicine drainage ring 48, so that the medicine and the clean water can be preliminarily mixed in the first mixing zone 45 and then further evenly mixed when passing through the second mixing zone 46.

[0058] See Figure 6-7 In order to improve the mixing effect of the reagent and the clean water in the first mixing zone 45 and the second mixing zone 46, the present invention provides a mixing mechanism 49 in the first mixing zone 45 and the second mixing zone 46 to improve the mixing effect;

[0059] Specifically, the mixing mechanism 49 includes a merge ring 491. A merge port 492 is provided at the bottom center of the merge frame 41. The merge ring 491 is mounted at the lower end of the merge port 492 and is coaxially arranged with the drainage frame 42. A vertically arranged mixing rod 493 is provided on the inner axis of the merge ring 491. The upper end of the mixing rod 493 is connected to the drainage frame 42 and is used to drive the drainage frame 42 to rotate within the merge frame 41, thereby uniformly mixing the clean water and the reagent in the first mixing zone 45 and the second mixing zone 46.

[0060] The mixing rod 493 is located in the second mixing zone 46 and has a plurality of mixing branches 494 extending uniformly along the circumference. The ends of the mixing branches 494 facing away from the mixing rod 493 are connected to mixing and stirring blades 495. The mixing and stirring blades 495 rotate and fit against the inner wall of the confluence frame 41. The mixing and stirring blades 495 can further stir and mix the mixed liquid in the second mixing zone 46.

[0061] A plurality of mixing blades 496 are evenly arranged circumferentially on the upper surface of the drainage frame 42. The rotation of the drainage frame 42 drives the mixing blades 496 to rotate synchronously, so that the mixing blades 496 can perform preliminary rotational mixing on the medicine and clean water in the first mixing zone 45; a plurality of through holes 497 are evenly opened on the mixing blades 496 to improve the mixing effect of the mixing blades 496 on the mixed liquid in the first mixing zone 45.

[0062] The mixing rod 493 is provided with spiral blades 498 inside the slip ring 491, so as to further mix the mixed liquid discharged towards the confluence port 492 in the second mixing zone 46, thereby achieving the best mixing effect.

[0063] Look back Figure 4 The lower end of the mixing rod 493 penetrates through the bottom of the temporary storage tank 3 and is rotatably installed on the temporary storage tank 3, and the lower end of the mixing rod 493 is connected to the mixing motor 499. The mixing motor 499 is arranged in the protective shell 490 provided at the bottom of the temporary storage tank 3;

[0064] The mixing motor 499 rotates to drive the mixing rod 493 to rotate, thereby synchronously rotating the drainage frame 42, so as to drive the mixing blades 496 to rotate synchronously, achieving the purpose of uniformly mixing the mixed liquid in the first mixing zone 45; at the same time, the mixing rod 493 will drive the mixing stirring blades 495 to rotate synchronously through the mixing support strips 494, thereby further mixing the mixed liquid in the second mixing zone 46.

[0065] Look back Figure 6 In order to ensure that the drainage frame 42 remains stable when rotating synchronously with the mixing rod 493 and prevent the drainage frame 42 from shaking and affecting the flow of the mixed liquid in the first mixing zone 45 to the second mixing zone 46 through the drainage gap 43, the present invention is provided with an annular balance groove 421 on the outer side wall of the drainage frame 42, and a plurality of arc-shaped balance strips 422 that are circumferentially and uniformly arranged on the inner side wall of the confluence frame 41 and are rotationally matched with the balance groove 421; the drainage frame 42 is rotationally matched with the arc-shaped balance strips 422 through the balance groove 421, which can ensure that the drainage frame 42 remains stable when rotating.

[0066] A plurality of through holes 423 are uniformly arranged in the part of the arc-shaped balance strip 422 located in the drainage gap 43 to prevent the mixed liquid from converging on the arc-shaped balance strip 422. Through the through holes 423, it can effectively ensure that the mixed liquid in the first mixing zone 45 smoothly flows to the second mixing zone 46.

[0067] Look back Figure 4-5 The spraying device 5 includes an annular pipe 51. The annular pipe 51 is installed at the bottom of the temporary storage tank 3 through a bracket, and the annular pipe 51 is communicated with the inside of the temporary storage tank 3 through a branch pipe 52. A plurality of spray heads 53 are circumferentially connected to the lower end of the annular pipe 51 for spraying the weeding mixed liquid in the annular pipe 51.

[0068] The mixed liquid temporarily stored at the bottom of the temporary storage tank 3 enters the annular pipe 51 through the branch pipe 52, and then is sprayed towards the area to be weeded through the spray heads 53 installed on the annular pipe 51, thereby achieving the purpose of weeding.

[0069] Embodiment 2:

[0070] Refer to Figure 8-9, on the basis of the first embodiment, in order to prevent the problem of waste caused by excessive mixture temporarily stored at the bottom of the temporary storage tank 3, the present invention is provided with a water level quantification mechanism 6 inside the temporary storage tank 3 for controlling the capacity of the mixture temporarily stored at the bottom of the temporary storage tank 3;

[0071] Specifically, the water level quantification mechanism 6 includes a buoyancy ring 61, the buoyancy ring 61 is slidably arranged on the inner side wall of the temporary storage tank 3, and a plurality of vertically arranged water level adjusting rods 62 are evenly connected to the upper circumference of the buoyancy ring 61. The upper ends of the water level adjusting rods 62 slidably penetrate through the confluence frame 41 and are slidably sleeved on an annular plate 63 arranged above the confluence frame 41. The annular plate 63 is slidably arranged on the inner side wall of the temporary storage tank 3 in the vertical direction. A plurality of linkage rods 64 are intertwined on the annular plate 63, and liquid outlet controllers 65 are arranged in both the clear water outlet pipe 21 and the chemical agent outlet pipe 22; and a plurality of liquid outlet controllers 65 are connected to the linkage rods 64.

[0072] The mixture in the second mixing area 46 enters the inner bottom of the temporary storage tank 3 through the confluence ring 491. As the mixture is continuously added, the water level of the mixture at the inner bottom of the temporary storage tank 3 gradually rises until it contacts the buoyancy ring 61. At this time, as the water level continues to rise, the buoyancy ring 61 will move upward along with the rising water level, and then drive the annular plate 63 to move upward synchronously through the water level adjusting rods 62. Then, under the cooperation of the linkage rods 64, the liquid outlet controllers 65 are driven to block the clear water outlet pipe 21 and the chemical agent outlet pipe 22, preventing the clear water and the chemical agent from flowing downward continuously. When the mixture at the inner bottom of the temporary storage tank 3 is consumed after being sprayed by the spraying device 5, the water level will gradually decrease. Then, under the action of gravity, the buoyancy ring 61 and the annular plate 63 are driven to move downward, and at this time, the liquid outlet controllers 65 release the restriction on the clear water outlet pipe 21 and the chemical agent outlet pipe 22.

[0073] The upper part of the water level adjusting rod 62 is a threaded rod structure, and the threaded rod is threadedly connected to a transmission gear 66 rotatably installed at the lower end of the annular plate 63. An internal gear ring 67 meshing with the transmission gear 66 is rotatably arranged at the lower end of the annular plate 63. By rotating the internal gear ring 67 to drive the transmission gear 66 to rotate, the up and down movement of the water level adjusting rod 62 is realized, so that the height of the buoyancy ring 61 can be adjusted, so as to adjust the position of the highest water level of the mixture at the inner bottom of the temporary storage tank 3.

[0074] Look back Figure 1 , an operation hole is opened on the side wall of the temporary storage tank 3 corresponding to the position of the annular plate 63, and a closing plate 68 is installed in the operation hole in a detachable manner, which is convenient for operating and rotating the internal gear ring 67 to realize the adjustment of the height of the buoyancy ring 61.

[0075] Refer to Figure 10-11, since the liquid outlet controller 65 in the clear water outlet pipe 21 has the same structure as the liquid outlet controller 65 in the chemical agent outlet pipe 22, and the only difference lies in the size, the liquid outlet controller 65 in the clear water outlet pipe 21 will be described in detail in this embodiment. The liquid outlet controller 65 includes a plugging ring 651 which is arranged on the inner side wall of the clear water outlet pipe 21 and above the clear water outlet hole 233. A plugging plate 652 is slidably arranged inside the clear water outlet pipe 21 and below the plugging ring 651. The lower end of the plugging plate 652 is connected with a control rod 653, and the lower end of the control rod 653 slidably penetrates through the bottom of the clear water outlet pipe 21 and is connected to the linkage rod 64. The control rod 653 is in sealing cooperation with the bottom of the clear water outlet pipe 21 to prevent clear water from overflowing.

[0076] When the water level of the mixed liquid at the bottom of the temporary storage tank 3 rises to the highest level, the buoyancy ring 61 will rise with the rise of the water level of the mixed liquid, and then drive the annular plate 63 to move upward through the water level adjusting rod 62, and drive the control rod 653 to move upward through the linkage rod 64, so that the control rod 653 pushes the plugging plate 652 to move upward until the plugging ring 651 is blocked, thereby blocking the downward flow of clear water from the plugging ring 651, and restricting the flow of clear water at this time; when the water level drops, under the action of gravity, the plugging plate 652 moves downward, enabling the clear water to flow downward from the plugging ring 651 again.

[0077] It should be noted that there is enough clearance between the side wall of the plugging plate 652 and the inner side wall of the clear water outlet pipe 21 to ensure that the clear water can flow downward through this clearance to the inner bottom of the clear water outlet pipe 21.

[0078] Looking back Figure 8 , since the annular plate 63 drives the linkage rod 64 to move up and down, through holes are provided in the outer side walls of the clear water outlet pipe 21 and the chemical agent outlet pipe 22 to form a through cooperation chute 69, and the linkage rod 64 is slidably arranged in the cooperation chute 69 to ensure that the annular plate 63 can drive the control rod 653 to move up and down smoothly through the linkage rod 64.

[0079] Looking back Figure 4 , based on the above-mentioned cooperation chute 69, there may be a situation where clear water or chemical agent flows out from the cooperation chute 69 to the upper surface of the current limiting frame 44. Therefore, an annular drainage channel 441 is provided on the upper surface of the current limiting frame 44 and at the outer edges of the clear water drainage ring 47 and the chemical agent drainage ring 48. A discharge channel 442 is provided at the outer edge of the upper surface of the current limiting frame 44. A guiding channel 443 communicating with the discharge channel 442 is provided on one side of the annular drainage channel 441 facing the discharge channel 442, so as to guide the clear water and chemical agent in the annular drainage channel 441 to the discharge channel 442. A number of through discharge holes 444 are evenly provided in the circumferential direction of the discharge channel 442, so that the clear water and chemical agent in the discharge channel 442 can flow smoothly to the first mixing area 45 through the discharge holes 444.

[0080] The implementation principle of the present invention is as follows:

[0081] (1): Install the liquid storage tank 1 pre-filled with chemicals and clear water by a drone. After flying to the designated weeding area, through remote control, drive the control valve of the corresponding selected chemical to open, so that the chemical flows through the chemical liquid outlet pipe 22 into the quantitative liquid outlet mechanism 23. Similarly, the clear water also flows into the quantitative liquid outlet mechanism 23;

[0082] (2): Then, evenly mix the chemical in the clear water through the solution mixing device 4 and temporarily store it at the inner bottom of the temporary storage tank 3. At the same time, the spraying device 5 can spray the mixed liquid in the temporary storage tank 3 onto the weeding area to achieve the weeding purpose;

[0083] (3): As the solution mixing device 4 continuously prepares the mixed liquid, the water level of the mixed liquid at the inner bottom of the temporary storage tank 3 will gradually rise until it pushes the buoyancy ring 61 upward, thereby driving the liquid outlet controller 65 to close the outflow of the clear water in the clear water outlet pipe 21 and the outflow of the chemical in the chemical liquid outlet pipe 22;

[0084] (4): After the water level of the mixed liquid at the inner bottom of the temporary storage tank 3 drops, the liquid outlet controller 65 releases the control of the clear water outlet pipe 21 and the chemical liquid outlet pipe 22, so that the solution mixing device 4 prepares the mixed liquid again for use by the spraying device 5.

[0085] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A herbicide dispensing device based on a plant protection unmanned aerial vehicle, comprising a liquid storage tank (1) for storing a herbicide solution, the liquid storage tank (1) being detachably mounted on an existing plant protection unmanned aerial vehicle, characterized in that: A liquid storage tank (1) is provided with a metering liquid discharging device (2) at the bottom for mixing the clear water and herbicide in the liquid storage tank (1); a temporary storage tank (3) for storing the mixed liquid is detachably installed at the bottom of the liquid storage tank (1), and the metering liquid discharging device (2) cooperates with a solution mixing device (4) in the temporary storage tank (3). A spraying device (5) communicating with the temporary storage tank (3) is provided at the bottom of the temporary storage tank (3) for evenly spraying the weeding mixed liquid onto the area to be weeded; The metering liquid discharging device (2) includes a clear water discharging pipe (21) and a chemical agent discharging pipe (22), and metering liquid discharging mechanisms (23) are provided on both the clear water discharging pipe (21) and the chemical agent discharging pipe (22) for controlling the liquid discharging speeds of the clear water and the chemical agent; The metering liquid discharging mechanism (23) includes a chemical agent metering ring (231) and a clear water metering ring (232). The clear water metering ring (232) is slidably sleeved on the clear water discharging pipe (21) and they are in sealed cooperation. The chemical agent metering ring (231) is also slidably sleeved on the chemical agent discharging pipe (22) and they are in sealed cooperation. A plurality of clear water discharging holes (233) and chemical agent discharging holes (234) are respectively formed on the outer side walls of the bottoms of the clear water discharging pipe (21) and the chemical agent discharging pipe (22) for realizing the outflow of the clear water and the chemical agent. The upper side wall of the clear water metering ring (232) is connected to a first electric push rod (235) on the bottom wall of the liquid storage tank (1) through a connecting block for controlling the up and down movement of the clear water metering ring (232); the upper side wall of the chemical agent metering ring (231) is also connected to a second electric push rod (236) on the bottom wall of the liquid storage tank (1) through a connecting block for controlling the up and down movement of the chemical agent metering ring (231); The solution mixing device (4) includes a confluence frame (41) installed on the inner side wall of the temporary storage tank (3). The confluence frame (41) is in an upward-opening horn-shaped structure as a whole. A diversion frame (42) is arranged in the confluence frame (41), and the diversion frame (42) is in a downward-opening horn-shaped structure. A diversion gap (43) for the flow of the mixed liquid is left between the outer side wall of the diversion frame (42) and the inner side wall of the confluence frame (41); A current-limiting frame (44) is arranged in the confluence frame (41) and above the diversion frame (42), and the current-limiting frame (44) is also in a downward-opening horn-shaped structure. A first mixing area (45) is formed between the current-limiting frame (44) and the diversion frame (42), and a second mixing area (46) is formed between the confluence frame (41) and the diversion frame (42); The solution mixing device (4) further includes a clear water diversion ring (47) and a chemical agent diversion ring (48). The clear water diversion ring (47) is sleeved on the area of the clear water discharging pipe (21) corresponding to the clear water discharging holes (233), and the chemical agent diversion ring (48) is sleeved on the area of the chemical agent discharging pipe (22) corresponding to the chemical agent discharging holes (234). The lower ends of the clear water diversion ring (47) and the chemical agent diversion ring (48) are both connected in the current-limiting frame (44) and penetrate through the current-limiting frame (44) into the first mixing area (45).

2. The herbicide dispensing device based on a plant protection unmanned aerial vehicle according to claim 1, wherein: The liquid storage tank (1) is a hollow shell structure with an open upper end, and a clean water storage chamber (11) is provided in the middle of the liquid storage tank (1) for storing clean water. A plurality of drug storage chambers (12) are evenly provided in the liquid storage tank (1) along the outer circumference of the clean water storage chamber (11) for storing various weed control drugs. Top covers (13) are detachably mounted on the upper ends of the clean water storage chamber (11) and the drug storage chamber (12). The bottom of the clean water storage chamber (11) is provided with a converging slope (14) that converges from all sides to the connection point of the clean water outlet pipe (21), and the bottom of the medicine storage chamber (12) is also provided with a converging slope (14) that converges from all sides to the connection point of the medicine outlet pipe (22).

3. The herbicide dispensing device based on a plant protection UAV according to claim 2, characterized in that: The clean water outlet pipe (21) is connected to the bottom of the liquid storage tank (1) and is connected to the clean water storage chamber (11); a plurality of the medicine outlet pipes (22) are connected to the bottom of the liquid storage tank (1) and are respectively connected to a plurality of medicine storage chambers (12); and control valves are installed on both the clean water outlet pipe (21) and the medicine outlet pipe (22) for controlling the flow of clean water and medicine.

4. The herbicide dispensing device based on a plant protection unmanned aerial vehicle according to claim 1, characterized in that: A mixing mechanism (49) for improving the mixing effect is provided in the first mixing zone (45) and the second mixing zone (46); the mixing mechanism (49) includes a confluence ring (491); a confluence port (492) is provided at the bottom center of the confluence frame (41); the confluence ring (491) is installed at the lower end of the confluence port (492) and is coaxially arranged with the drainage frame (42); a vertically arranged mixing rod (493) is provided on the inner axis of the confluence ring (491); the upper end of the mixing rod (493) is connected to the drainage frame (42) and is used to drive the drainage frame (42) to rotate in the confluence frame (41); The mixing rod (493) is located in the second mixing zone (46) and has a plurality of mixing branches (494) extending uniformly in the circumferential direction. The ends of the mixing branches (494) facing away from the mixing rod (493) are connected to mixing stirring blades (495). The mixing stirring blades (495) are rotatably attached to the inner wall of the confluence frame (41). The upper surface of the diversion frame (42) is uniformly provided with a plurality of mixing blades (496) in the circumferential direction. The mixing blades (496) are uniformly provided with a plurality of through holes (497). The mixing rod (493) is provided with spiral blades (498) located in the confluence ring (491). The lower end of the mixing rod (493) passes through the bottom of the temporary storage box (3) and is rotatably mounted on the temporary storage box (3). The lower end of the mixing rod (493) is connected to a mixing motor (499). The mixing motor (499) is arranged in a protective shell (490) arranged at the bottom of the temporary storage box (3).

5. The herbicide dispensing device based on a plant protection unmanned aerial vehicle according to claim 1, characterized in that: An annular balancing groove (421) is provided on the outer side wall of the drainage frame (42), and a plurality of arc-shaped balancing bars (422) rotatably engaged with the balancing groove (421) are uniformly provided on the inner side wall of the confluence frame (41). A plurality of flow holes (423) are uniformly provided on the portion of the arc-shaped balancing bar (422) located in the drainage gap (43).

6. The herbicide spraying device based on a plant protection unmanned aerial vehicle according to claim 1, wherein: The spraying device (5) includes an annular pipe (51), the annular pipe (51) is installed at the bottom of the temporary storage tank (3) through a bracket, and the annular pipe (51) is internally communicated with the temporary storage tank (3) through a branch pipe (52). A plurality of spray heads (53) are circumferentially connected to the lower end of the annular pipe (51) for spraying the weeding mixture in the annular pipe (51).

7. The herbicide dispensing device based on a plant protection unmanned aerial vehicle according to claim 1, wherein: A water level quantification mechanism (6) is arranged inside the temporary storage tank (3) for controlling the capacity of the mixture temporarily stored at the bottom of the temporary storage tank (3). The water level quantification mechanism (6) includes a buoyancy ring (61), the buoyancy ring (61) is slidably arranged on the inner side wall of the temporary storage tank (3), and a plurality of vertically arranged water level adjusting rods (62) are circumferentially and uniformly connected to the upper end of the buoyancy ring (61). The upper end of the water level adjusting rod (62) slidably penetrates through the confluence frame (41) and is slidably sleeved on an annular plate (63) arranged above the confluence frame (41). The annular plate (63) is slidably arranged on the inner side wall of the temporary storage tank (3) in the vertical direction. A plurality of linkage rods (64) are intertwined on the annular plate (63), and liquid outlet controllers (65) are arranged inside both the clean water outlet pipe (21) and the chemical agent outlet pipe (22). And a plurality of the liquid outlet controllers (65) are connected to the linkage rods (64). The upper end portion of the water level adjusting rod (62) is of a threaded rod structure, and the threaded rod is threadedly connected to a transmission gear (66) rotatably installed at the lower end of the annular plate (63). An internal gear ring (67) meshing with the transmission gear (66) is rotatably arranged at the lower end of the annular plate (63). An operation hole is formed in the side wall of the temporary storage tank (3) corresponding to the position of the annular plate (63), and a closing plate (68) is detachably installed in the operation hole. Through holes of a matching sliding groove (69) are formed in the outer side walls of the clean water outlet pipe (21) and the chemical agent outlet pipe (22), and the linkage rod (64) is slidably arranged in the matching sliding groove (69).

8. The herbicide dispensing device based on a plant protection UAV according to claim 7, wherein: The liquid outlet controller (65) includes a plugging ring (651), the plugging ring (651) is arranged on the inner side wall of the clean water outlet pipe (21) and is located above the clean water outlet hole (233). A plugging plate (652) is slidably arranged inside the clean water outlet pipe (21) and below the plugging ring (651). A control rod (653) is connected to the lower end of the plugging plate (652), and the lower end of the control rod (653) slidably penetrates through the bottom of the clean water outlet pipe (21) and is connected to the linkage rod (64). The control rod (653) is in sealing cooperation with the bottom of the clean water outlet pipe (21) to prevent clean water from overflowing. On the upper surface of the current-limiting frame (44) and at the outer edges of the clear-water drainage ring (47) and the medicament drainage ring (48), an annular drainage channel (441) is provided. At the outer edge of the upper surface of the current-limiting frame (44), a discharge channel (442) is provided. On one side of the annular drainage channel (441) facing the discharge channel (442), a guiding channel (443) communicating with the discharge channel (442) is provided, so that the clear water and the medicament in the annular drainage channel (441) are guided into the discharge channel (442). A plurality of through discharge holes (444) are evenly arranged circumferentially in the discharge channel (442), so that the clear water and the medicament in the discharge channel (442) can flow smoothly into the first mixing area (45) through the discharge holes (444).

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