Biological control release device and method based on natural enemy insects

Abstract

The invention discloses a biological control release device and method based on natural enemy insects, and relates to the technical field of biological control, the device comprises an unmanned aerial vehicle, a mounting frame is vertically mounted at the lower end of the unmanned aerial vehicle, and a plurality of release frames are arranged on the two opposite side walls of the mounting frame; the lower end, close to the side wall of the mounting frame, of the releasing frame is rotationally connected to the side wall of the mounting frame through a hinge, a releasing mechanism for sweeping the natural enemy insects in the releasing frame out of the releasing frame when the releasing frame obliquely releases the natural enemy insects is arranged in the releasing frame, and fixing mechanisms are arranged on the mounting frame and the releasing frame. According to the natural enemy insect releasing device, after the releasing frame inclines downwards, a sliding block and a second limiting plate move downwards through gravity, a second gear rolls along a rack, then a rotating roller and a cleaning brush roll, the cleaning brush cleans natural enemy insects on the inner wall of the releasing frame, the natural enemy insects are prevented from being attached to the inner wall of the releasing frame, and the releasing efficiency of the natural enemy insects is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of biological control, and specifically to a biological control release device and method based on natural enemy insects. Background Art

[0002] The release technology of natural enemy insects is a biological control method that controls pests by using natural enemy insects in nature, reduces the use of chemical pesticides, and thus protects the ecological environment and human health.

[0003] For the convenience of delivery, currently, most use drones to release natural enemy insects. There is a release device for releasing natural enemy insects with a drone, whose publication number is CN218229415U. Through the chuck and the adjusting rod, the release box can be quickly and fixedly installed on the drone. At the same time, when releasing natural enemy insects, the release quantity can have a certain uniformity, and the release box is convenient for disassembly, cleaning, has good air permeability, and can well accommodate natural enemy insects.

[0004] However, the above patent still has deficiencies. Some natural enemy insects will adhere to the inner wall of the release box. Just opening the release box cannot effectively release the natural enemy insects, seriously affecting the release quantity and release efficiency, and being inconvenient for users to use.

[0005] In view of the above problems, an improved biological control release device and method based on natural enemy insects are now designed. Summary of the Invention

[0006] The purpose of the present invention is to provide a biological control release device and method based on natural enemy insects to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A biological control release device based on natural enemy insects includes a drone. A mounting frame is vertically installed at the lower end of the drone. A plurality of release frames for placing natural enemy insects are provided on two opposite side walls of the mounting frame. The release frames on both sides of the mounting frame are symmetrical to each other. The lower end of the side wall of the release frame close to the mounting frame is rotatably connected to the side wall of the mounting frame through a hinge. One end of the release frame away from the mounting frame is provided with a switch door for blocking the open side of the release frame. The upper end of the switch door is rotatably connected to the upper end of the release frame through a hinge. A release mechanism is arranged inside the release frame to sweep the natural enemy insects inside the release frame out of the release frame when the release frame is tilted to release natural enemy insects. A fixing mechanism is arranged on the mounting frame and the release frame to keep the release frame horizontal before releasing natural enemy insects.

[0009] As a further solution of the present invention: The release mechanism includes two second rotating rods. Two sliding grooves are formed on two opposite side walls of the release frame. The sliding grooves are perpendicular to the open end of the release frame. A slider is slidably connected to the inner wall of the sliding groove. The two ends of the slider are respectively provided with a first limiting plate and a second limiting plate. The first limiting plate is closely attached to the side wall of the release frame, and the second limiting plate is closely attached to the inner wall of the release frame. The two second rotating rods are arranged between the two second limiting plates. The two second rotating rods correspond to the two sliding grooves one by one. The two ends of the second rotating rod pass through the third magnet, the slider, and the first limiting plate and are provided with a first gear. The second rotating rod is rotatably connected to the third magnet, the slider, and the first limiting plate. A rotating roller is installed on the side wall of the second rotating rod inside the release frame. A plurality of cleaning brushes for cleaning natural enemy insects inside the release frame out of the release frame are installed on the side wall of the rotating roller. A rotating assembly for rotating the rotating roller and the cleaning brushes under the action of gravity is arranged on the side wall of the release frame.

[0010] As a further solution of the present invention: The rotating assembly includes two fixed frames. The two fixed frames are respectively installed on the side wall of the release frame where the sliding groove is located. Rack bars are installed on the inner walls of the fixed frames parallel to the sliding grooves. A third rotating rod is installed on the side wall of the first limiting plate between the first gear and the rack bar. A second gear meshing with both the first gear and the rack bar is rotatably connected to the side wall of the third rotating rod.

[0011] As a further solution of the present invention: The fixing mechanism includes a third magnet. The third magnet is installed between the two second limiting plates. The third magnet is arranged at one end of the second limiting plate away from the open side of the release frame. A second magnet corresponding to the release frame is arranged inside the installation frame. One end of the second magnet is provided with a second support plate. The end of the second support plate away from the second magnet is installed on the inner wall of the installation frame. The surfaces of the second magnet and the third magnet facing each other have opposite polarities. The second magnet and the third magnet attract each other to move the cleaning brush, the rotating roller, and the second limiting plate to the side of the release frame close to the installation frame and keep the release frame in a horizontal state. An unlocking assembly for releasing the attraction between the third magnet and the second magnet to make the release frame tilt under the action of gravity is arranged inside the installation frame.

[0012] As a further solution of the present invention: The unlocking component includes a motor, the motor is installed on the top of the installation frame, the output end of the motor is installed with a first rotating rod, the end of the first rotating rod away from the motor is rotatably connected to the bottom of the installation frame, a screw rod is installed on the side wall of the first rotating rod, and an internally threaded moving sleeve is rotatably connected to the side wall of the screw rod through threads. A first magnet is arranged on the side wall of the internally threaded moving sleeve close to the release frame, and the first magnet is arranged between the second magnet and the inner wall of the installation frame. One end of the first magnet is installed with a first support plate, and the end of the first support plate away from the first magnet is installed on the side wall of the internally threaded moving sleeve. The first support plate is arranged on the side of the second magnet away from the second support plate, and the surface of the first magnet close to the release frame has the same polarity as that of the third magnet.

[0013] As a further solution of the present invention: The side wall of the internally threaded moving sleeve moves along the inner wall of the installation frame through balls.

[0014] As a further solution of the present invention: Reinforcing support ribs for improving the structural strength of the first support plate and the second support plate are installed on the side walls of the first support plate and the second support plate.

[0015] As a further solution of the present invention: A counterweight for keeping the switch door vertical is installed at the lower end of the side wall of the switch door.

[0016] As a further solution of the present invention: The installation frame is detachably installed at the lower end of the drone through screws.

[0017] A usage method of a biological control release device based on natural enemy insects includes the following steps:

[0018] Step 1: When in use, the drone flies to the release area, and then the motor is started by controlling through the controller.

[0019] Step 2: The output end of the motor drives the first rotating rod to rotate, the first rotating rod drives the screw rod to rotate, and under the action of the thread, the screw rod drives the internally threaded moving sleeve to move. The internally threaded moving sleeve drives the first support plate and the first magnet to move. When the first magnet moves between the second magnet and the inner wall of the installation frame, since the surfaces of the first magnet and the third magnet facing each other have the same polarity, a repulsive force is generated between the first magnet and the third magnet. At this time, under the action of gravity and the repulsive force, the release frame tilts downward, and the cleaning brush, the rotating roller, and the second limiting plate move downward.

[0020] Step 3: Under the action of gravity, the counterweight drives the open end of the release box to open the door, and at the same time, the first limiting plate drives the third rotating rod and the second gear to move downward. The second gear rolls along the rack, the second gear drives the first gear to rotate, the first gear drives the second rotating rod to rotate, the second rotating rod drives the rotating roller to rotate, and the rotating roller drives the cleaning brush to rotate. The cleaning brush sweeps the natural enemy insects on the inner wall of the release box, so that the natural enemy insects are removed through the open end of the release box.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] After the release box tilts downward in the present invention, gravity is used to move the slider and the second limiting plate downward, so that the second gear rolls along the rack, and then the rotating roller and the cleaning brush roll, so that the cleaning brush sweeps the natural enemy insects on the inner wall of the release box, avoiding the attachment of natural enemy insects to the inner wall of the release box and improving the release efficiency of natural enemy insects.

[0023] In the present invention, through the mutual attraction of the second magnet and the third magnet, the cleaning brush and the second limiting plate are moved to one end of the release box close to the installation box, realizing the initial fixation of the cleaning brush and the horizontal fixation of the release box. Then, through the mutual repulsion of the first magnet and the third magnet, the release box tilts under the action of gravity, and the slider and the cleaning brush move downward, realizing the cleaning of the natural enemy insects on the inner wall of the release box by the cleaning brush, effectively improving the fixation efficiency and release efficiency of the release box and the second limiting plate. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the present invention before the release of natural enemy insects.

[0025] Figure 2 It is a schematic structural diagram of the present invention when the natural enemy insects are released.

[0026] Figure 3 It is a schematic structural diagram of the fixing mechanism of the present invention.

[0027] Figure 4 It is a schematic structural diagram of the release box of the present invention.

[0028] Figure 5 It is a schematic structural diagram of the release mechanism of the present invention.

[0029] Wherein: 1. UAV; 2. Installation frame; 3. Release frame; 4. Switch door; 5. Counterweight; 6. Fixed frame; 7. Chute; 8. Rack; 9. First limit plate; 10. Motor; 11. Screw; 12. Internally threaded moving sleeve; 13. First support plate; 14. First magnet; 15. Second magnet; 16. Second support plate; 17. First rotating rod; 18. First gear; 19. Second rotating rod; 20. Third rotating rod; 21. Second gear; 22. Rotating roller; 23. Cleaning brush; 24. Slide block; 25. Second limit plate; 26. Third magnet. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1-5 , in the embodiments of the present invention, a biological control release device based on natural enemy insects includes a UAV 1. A mounting frame 2 is vertically installed at the lower end of the UAV 1. A plurality of release frames 3 for placing natural enemy insects are provided on two opposite side walls of the mounting frame 2. The release frames 3 on both sides of the mounting frame 2 are symmetrical to each other. The lower end of the side wall of the release frame 3 close to the mounting frame 2 is rotatably connected to the side wall of the mounting frame 2 through a hinge. One end of the release frame 3 away from the mounting frame 2 is provided with a switch door 4 for blocking the open side of the release frame 3. The upper end of the switch door 4 is rotatably connected to the upper end of the release frame 3 through a hinge. A counterweight 5 for keeping the switch door 4 vertical is installed at the lower end of the side wall of the switch door 4. A release mechanism for sweeping the natural enemy insects inside the release frame 3 out of the release frame 3 when the release frame 3 is tilted to release the natural enemy insects is provided inside the release frame 3. A fixing mechanism for keeping the release frame 3 horizontal before releasing the natural enemy insects is provided on the mounting frame 2 and the release frame 3.

[0032] The release mechanism includes two second rotating rods 19. Two sliding grooves 7 are formed on two opposite side walls of the release frame 3. The sliding grooves 7 are perpendicular to the open end of the release frame 3. A slider 24 is slidably connected to the inner wall of the sliding groove 7. A first limiting plate 9 and a second limiting plate 25 are respectively installed at two ends of the slider 24. The first limiting plate 9 abuts against the side wall of the release frame 3, and the second limiting plate 25 abuts against the inner wall of the release frame 3. The two second rotating rods 19 are arranged between the two second limiting plates 25. The two second rotating rods 19 correspond to the two sliding grooves 7 one by one. Both ends of the second rotating rod 19 pass through a third magnet 26, the slider 24, and the first limiting plate 9 and are installed with a first gear 18. The second rotating rod 19 is rotatably connected to the third magnet 26, the slider 24, and the first limiting plate 9. A rotating roller 22 is installed on the side wall of the second rotating rod 19 inside the release frame 3. A plurality of cleaning brushes 23 for sweeping natural enemy insects inside the release frame 3 out of the release frame 3 are installed on the side wall of the rotating roller 22. A rotating assembly for causing the rotating roller 22 and the cleaning brushes 23 to rotate under the action of gravity is arranged on the side wall of the release frame 3.

[0033] The rotating assembly includes two fixed frames 6. The two fixed frames 6 are respectively installed on the side wall of the release frame 3 where the sliding groove 7 is located. Rack bars 8 are installed on the inner walls of the fixed frames 6 parallel to the sliding grooves 7. A third rotating rod 20 is installed on the side wall of the first limiting plate 9 between the first gear 18 and the rack bar 8. A second gear 21 meshing with both the first gear 18 and the rack bar 8 is rotatably connected to the side wall of the third rotating rod 20.

[0034] When the release frame 3 inclines downward, under the action of gravity, the first limiting plate 9, the slider 24, the second limiting plate 25, the rotating roller 22, and the cleaning brushes 23 all move downward. The first limiting plate 9 drives the third rotating rod 20 and the second gear 21 to move downward. The second gear 21 rolls along the rack bar 8. The second gear 21 drives the first gear 18 to rotate. The first gear 18 drives the second rotating rod 19 to rotate. The second rotating rod 19 drives the rotating roller 22 to rotate. The rotating roller 22 drives the cleaning brushes 23 to rotate. The cleaning brushes 23 sweep the natural enemy insects on the inner wall of the release frame 3, so that the natural enemy insects are moved out through the open end of the release frame 3.

[0035] The fixing mechanism includes a third magnet 26, which is installed between two second limiting plates 25. The third magnet 26 is arranged at one end of the second limiting plate 25 away from the open side of the release frame 3. A second magnet 15 corresponding to the release frame 3 one by one is arranged inside the installation frame 2. One end of the second magnet 15 is installed with a second support plate 16. The end of the second support plate 16 away from the second magnet 15 is installed on the inner wall of the installation frame 2. The surfaces of the second magnet 15 and the third magnet 26 facing each other have opposite polarities. The second magnet 15 and the third magnet 26 attract each other, causing the cleaning brush 23, the rotating roller 22, and the second limiting plate 25 to move to the side of the release frame 3 close to the installation frame 2 and keeping the release frame 3 in a horizontal state. An unlocking assembly is arranged inside the installation frame 2 for releasing the attraction between the third magnet 26 and the second magnet 15, so that the release frame 3 tilts under the action of gravity.

[0036] The unlocking assembly includes a motor 10, which is installed on the top of the installation frame 2. The output end of the motor 10 is installed with a first rotating rod 17. The end of the first rotating rod 17 away from the motor 10 is rotatably connected to the bottom of the installation frame 2. A screw rod 11 is installed on the side wall of the first rotating rod 17. The side wall of the screw rod 11 is rotationally connected with an internally threaded moving sleeve 12 through a thread. The side wall of the internally threaded moving sleeve 12 moves along the inner wall of the installation frame 2 through a ball. A first magnet 14 is arranged on the side wall of the internally threaded moving sleeve 12 close to the release frame 3. The first magnet 14 is arranged between the second magnet 15 and the inner wall of the installation frame 2. One end of the first magnet 14 is installed with a first support plate 13. The end of the first support plate 13 away from the first magnet 14 is installed on the side wall of the internally threaded moving sleeve 12. The first support plate 13 is arranged on the side of the second magnet 15 away from the second support plate 16. The surface of the first magnet 14 close to the release frame 3 has the same polarity as the third magnet 26.

[0037] During use, the motor 10 is started. The output end of the motor 10 drives the first rotating rod 17 to rotate. The first rotating rod 17 drives the screw rod 11 to rotate. Under the action of the thread, the screw rod 11 drives the internally threaded moving sleeve 12 to move. The internally threaded moving sleeve 12 drives the first support plate 13 and the first magnet 14 to move. When the first magnet 14 moves between the second magnet 15 and the inner wall of the installation frame 2, since the surfaces of the first magnet 14 and the third magnet 26 facing each other have the same polarity, a repulsive force is generated between the first magnet 14 and the third magnet 26. At this time, under the action of gravity and the repulsive force, the release frame 3 tilts downward, and the cleaning brush 23, the rotating roller 22, and the second limiting plate 25 move downward.

[0038] The working principle of a biological control release device based on natural enemy insects:

[0039] In use, the drone 1 flies to the release area and then the motor 10 is started by the controller.

[0040] The output end of the motor 10 drives the first rotating rod 17 to rotate, the first rotating rod 17 drives the screw rod 11 to rotate, and under the action of the thread, the screw rod 11 drives the internally threaded moving sleeve 12 to move. The internally threaded moving sleeve 12 drives the first support plate 13 and the first magnet 14 to move. When the first magnet 14 moves between the second magnet 15 and the inner wall of the mounting frame 2, since the polarities of the opposite faces of the first magnet 14 and the third magnet 26 are the same, a repulsive force is generated between the first magnet 14 and the third magnet 26. At this time, under the action of gravity and the repulsive force, the release frame 3 tilts downward, and the cleaning brush 23, the rotating roller 22, and the second limiting plate 25 move downward.

[0041] Under the action of gravity, the counterweight 5 drives the switch door 4 to open the open end of the release frame 3. At the same time, the first limiting plate 9 drives the third rotating rod 20 and the second gear 21 to move downward. The second gear 21 rolls along the rack 8, the second gear 21 drives the first gear 18 to rotate, the first gear 18 drives the second rotating rod 19 to rotate, the second rotating rod 19 drives the rotating roller 22 to rotate, and the rotating roller 22 drives the cleaning brush 23 to rotate. The cleaning brush 23 sweeps the natural enemy insects on the inner wall of the release frame 3, so that the natural enemy insects are removed through the open end of the release frame 3.

[0042] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

Claims

1. A biological control release device based on natural enemy insects, comprising a drone (1), an installation frame (2) is vertically installed at the lower end of the drone (1), a plurality of release frames (3) for placing natural enemy insects are arranged on two opposite side walls of the installation frame (2), the release frames (3) on both sides of the installation frame (2) are symmetric with each other, and it is characterized in that, The lower end of the side wall of the release box (3) close to the installation box (2) is rotatably connected to the side wall of the installation box (2) through a hinge. One end of the release box (3) away from the installation box (2) is provided with a switch door (4) for blocking the open side of the release box (3). The upper end of the switch door (4) is rotatably connected to the upper end of the release box (3) through a hinge. A release mechanism is arranged inside the release box (3) for sweeping the natural enemy insects inside the release box (3) out of the release box (3) when the release box (3) is tilted to release the natural enemy insects. A fixing mechanism is arranged on the installation box (2) and the release box (3) for keeping the release box (3) horizontal before releasing the natural enemy insects.

2. The biological control release device based on natural enemy insects according to claim 1, characterized in that, The release mechanism includes two second rotating rods (19). Two sliding grooves (7) are opened on two opposite side walls of the release box (3). The sliding grooves (7) are perpendicular to the open end of the release box (3). A slider (24) is slidably connected to the inner wall of the sliding groove (7). A first limiting plate (9) and a second limiting plate (25) are respectively installed at both ends of the slider (24). The first limiting plate (9) is closely attached to the side wall of the release box (3), and the second limiting plate (25) is closely attached to the inner wall of the release box (3). The two second rotating rods (19) are arranged between the two second limiting plates (25). The two second rotating rods (19) correspond to the two sliding grooves (7) one by one. Both ends of the second rotating rod (19) pass through a third magnet (26), the slider (24), and the first limiting plate (9) and are installed with a first gear (18). The second rotating rod (19) is rotatably connected to the third magnet (26), the slider (24), and the first limiting plate (9). A rotating roller (22) is installed on the side wall of the second rotating rod (19) inside the release box (3). A plurality of cleaning brushes (23) for sweeping the natural enemy insects inside the release box (3) out of the release box (3) are installed on the side wall of the rotating roller (22). A rotating component is arranged on the side wall of the release box (3) for rotating the rotating roller (22) and the cleaning brushes (23) under the action of gravity.

3. The biological control release device based on natural enemy insects according to claim 2, characterized in that, The rotating component includes two fixed frames (6). The two fixed frames (6) are respectively installed on the side wall of the release box (3) where the sliding groove (7) is located. Rack bars (8) are installed on the inner walls of the fixed frames (6) parallel to the sliding grooves (7). A third rotating rod (20) is installed on the side wall of the first limiting plate (9) between the first gear (18) and the rack bar (8). A second gear (21) meshing with both the first gear (18) and the rack bar (8) is rotatably connected to the side wall of the third rotating rod (20).

4. A biological control release device based on natural enemy insects according to claim 1, characterized in that, The fixing mechanism includes a third magnet (26), the third magnet (26) is installed between two second limiting plates (25), the third magnet (26) is arranged at one end of the second limiting plate (25) away from the open side of the release frame (3), a second magnet (15) corresponding to the release frame (3) one by one is arranged inside the installation frame (2), one end of the second magnet (15) is installed with a second support plate (16), and one end of the second support plate (16) away from the second magnet (15) is installed on the inner wall of the installation frame (2). The surfaces of the second magnet (15) and the third magnet (26) facing each other have opposite polarities. The second magnet (15) and the third magnet (26) attract each other to move the cleaning brush (23), the rotating roller (22), and the second limiting plate (25) to the side of the release frame (3) close to the installation frame (2), and keep the release frame (3) in a horizontal state. An unlocking component is arranged inside the installation frame (2) for releasing the attraction between the third magnet (26) and the second magnet (15) to make the release frame (3) tilt under the action of gravity.

5. The biological control release device based on natural enemy insects according to claim 4, characterized in that, The unlocking component includes a motor (10), the motor (10) is installed on the top of the installation frame (2), the output end of the motor (10) is installed with a first rotating rod (17), and one end of the first rotating rod (17) away from the motor (10) is rotatably connected to the bottom of the installation frame (2). A screw rod (11) is installed on the side wall of the first rotating rod (17), and an internally threaded moving sleeve (12) is rotatably connected to the side wall of the screw rod (11) through threads. A first magnet (14) is arranged on the side wall of the internally threaded moving sleeve (12) close to the release frame (3), the first magnet (14) is arranged between the second magnet (15) and the inner wall of the installation frame (2), one end of the first magnet (14) is installed with a first support plate (13), and one end of the first support plate (13) away from the first magnet (14) is installed on the side wall of the internally threaded moving sleeve (12). The first support plate (13) is arranged on the side of the second magnet (15) away from the second support plate (16), and the surface of the first magnet (14) close to the release frame (3) has the same polarity as the third magnet (26).

6. The biological control release device based on natural enemy insects according to claim 5, wherein, The side wall of the internally threaded moving sleeve (12) moves along the inner wall of the installation frame (2) through balls.

7. The biological control release device based on natural enemy insects according to claim 5, characterized in that, Reinforcing support ribs for improving the structural strength of the first support plate (13) and the second support plate (16) are installed on the side walls of the first support plate (13) and the second support plate (16).

8. The biological control release device based on natural enemy insects according to claim 1, characterized in that, A counterweight block (5) for keeping the switch door (4) vertical is installed at the lower end of the side wall of the switch door (4).

9. The biological control release device based on natural enemy insects according to claim 1, characterized in that, The installation frame (2) is detachably installed at the lower end of the unmanned aerial vehicle (1) by screws.

10. A method for using the biological control release device based on natural enemy insects according to any one of claims 1-9, characterized in that, Including the following steps: Step 1: During use, the unmanned aerial vehicle (1) flies to the dropping area, and then the motor (10) is controlled to start by the controller; Step 2: The output end of the motor (10) drives the first rotating rod (17) to rotate. The first rotating rod (17) drives the screw rod (11) to rotate. Under the action of the thread, the screw rod (11) drives the internally threaded moving sleeve (12) to move. The internally threaded moving sleeve (12) drives the first support plate (13) and the first magnet (14) to move. When the first magnet (14) moves between the second magnet (15) and the inner wall of the installation frame (2), since the polarities of the opposite faces of the first magnet (14) and the third magnet (26) are the same, a repulsive force is generated between the first magnet (14) and the third magnet (26). At this time, under the action of gravity and the repulsive force, the release frame (3) tilts downward, and the cleaning brush (23), the rotating roller (22), and the second limiting plate (25) move downward. Step 3: Under the action of gravity, the counterweight (5) drives the switch door (4) to open the open end of the release frame (3). At the same time, the first limiting plate (9) drives the third rotating rod (20) and the second gear (21) to move downward. The second gear (21) rolls along the rack (8). The second gear (21) drives the first gear (18) to rotate. The first gear (18) drives the second rotating rod (19) to rotate. The second rotating rod (19) drives the rotating roller (22) to rotate. The rotating roller (22) drives the cleaning brush (23) to rotate. The cleaning brush (23) sweeps the natural enemy insects on the inner wall of the release frame (3), so that the natural enemy insects are removed through the open end of the release frame (3).

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