Pesticide spraying device for forestry pest and disease control

Abstract

The invention discloses a pesticide spraying device for forestry pest and disease control, and belongs to the technical field of pesticide spraying. The unmanned aerial vehicle comprises an unmanned aerial vehicle body, a supporting frame is fixedly connected to the bottom of the unmanned aerial vehicle body, a pesticide spraying assembly is fixedly installed at the bottom of the unmanned aerial vehicle body, and a plurality of protection assemblies are fixedly installed on the side wall of the unmanned aerial vehicle body; the pesticide spraying assembly comprises a fixing column, the fixing column is fixedly connected to the bottom of the unmanned aerial vehicle body, and the fixing column is fixedly connected with a pesticide barrel. By arranging an air bag, a compressed gas storage bottle, an electric clamp and other structures, when the unmanned aerial vehicle body enters an abnormal flight state, the interior of the air bag can be rapidly inflated; the air bag is arranged on the side wall of the pesticide barrel, so that the air bag can protect the feeding pipe on the side wall and the top of the pesticide barrel, even if the pesticide barrel is broken due to impact force, the top of the pesticide barrel, the feeding pipe and other structures are wrapped by the air bag, the situation that a large amount of pesticide liquid in the pesticide barrel leaks is avoided, and the possibility of pollution to the surrounding environment is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of pesticide spraying, and in particular relates to a pesticide spraying device for controlling forestry pests and diseases. Background Art

[0002] Forestry pests and diseases refer to the phenomenon that trees are damaged or die due to the invasion of pests and diseases in forestry production, such as pine wood nematode disease. The rampant spread of pests and diseases will have a serious negative impact on forestry production. Therefore, the prevention and control of pests and diseases has become an important part of forestry production. In the forestry process, trees are often planted in a large area and mostly on mountains. Due to the steep and high mountains, it is inconvenient for workers to climb the mountain with medicine barrels to spray. Therefore, drones are now often used for pest control and pesticide spraying.

[0003] Chinese patent CN217242315U discloses a forestry pesticide spraying device for preventing and controlling tree diseases and insect pests, which relates to the technical field of pesticide spraying, including a spraying drone, a fixing frame is arranged on the top of the spraying drone, and a fixing cover is hinged on the top of the fixing frame. The forestry pesticide spraying device for preventing and controlling tree diseases and insect pests, when the pesticide in the inner cavity of the medicine barrel is sprayed, directly open the fixing cover to take out the medicine barrel in the inner cavity of the fixing frame, pull the liquid extraction tube to separate it from the pipeline joint, take out the pre-installed medicine barrel and put it into the inner cavity of the fixing frame, so that one end of the liquid extraction tube is connected to the pipeline joint on this medicine barrel, and cover the fixing cover to fix the medicine barrel, thereby realizing the function of adding pesticides by replacing the medicine barrel, avoiding the problem of low efficiency of traditional pesticide spraying devices in which pesticides are slowly added and prepared in the medicine storage box on the spraying drone, and improving the working efficiency of the forestry pesticide spraying device for preventing and controlling tree diseases and insect pests.

[0004] The above-mentioned prior art proposes a pesticide spraying device for forestry and tree pest control, which adopts a spraying drone to carry out pesticide spraying. During the flight of the drone, the spiral blade is often required to assist the drone in flying. After long-term use, the screws and other parts that fix the spiral blade will become loose due to wear or long-term corrosion by rain, etc. If the drone is still in a flying state at this time, it is easy to cause the drone to have abnormal flight states such as a large degree of tilt and deviation during the flight process. Since the drone is mostly in large woods when performing pest control on forestry trees, the drone will deviate at this time, which will cause the drone to collide with trees or mountains. If there is no object to block the falling process of the drone, the drone will fall directly into a valley or crack, which will be difficult to find later. Moreover, after the drone collides with a tree or a mountain, if the medicine barrel is broken, a large amount of medicine inside the medicine barrel will leak out, which is easy to pollute or damage the surrounding environment.

[0005] Therefore, we have proposed a pesticide spraying device for forestry pest control to solve the above-mentioned problems. Summary of the invention

[0006] In view of the problem in the prior art that when a drone enters an abnormal flight state, the medicine barrel may rupture, which easily causes pollution to the surrounding environment, the purpose of the present invention is to provide a pesticide spraying device for forestry pest control.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is as follows: a pesticide spraying device for forest pest control includes a drone body, a support frame is fixedly connected to the bottom of the drone body, a spraying component is fixedly installed at the bottom of the drone body, and a plurality of protective components are fixedly installed on the side wall of the drone body; The spraying assembly includes a fixed column, which is fixedly connected to the bottom of the drone body, and a medicine barrel is fixedly connected to the fixed column. The top of the medicine barrel is fixedly connected to a feed pipe, and the bottom of the medicine barrel is fixedly connected to a discharge pipe. An electric fan is fixedly installed inside the discharge pipe, and a protective assembly is fixedly installed on the side wall of the medicine barrel; The protection assembly comprises a protection tube, which is fixedly connected to the outer wall of the medicine barrel, and an air bag is slidably connected to the inner wall of the protection tube and the outer wall of the medicine barrel; The protective component includes a storage box, which is fixedly connected to the side wall of the drone body. The inner wall of the storage box is slidably connected with an ejection plate. The inner wall of the storage box is fixedly connected with a first spring. One end of the first spring away from the storage box is fixedly connected to the side wall of the ejection plate. A protective net is slidably connected inside the storage box.

[0008] Furthermore, the side wall of the protection tube is fixedly connected with a connecting piece, and the connecting piece and the side wall of the support frame are fixedly connected.

[0009] Furthermore, the side wall of the protection tube is rotatably connected to a protection plate via a hinge, and the inner wall of the protection tube is symmetrically fixedly connected to a compressed air storage bottle.

[0010] Furthermore, the top of the compressed air storage bottle is fixedly connected with an injection pipe, the other end of the injection pipe is fixedly connected with the side wall of the airbag, and an electromagnetic valve is fixedly installed on the side wall of the injection pipe.

[0011] Furthermore, a guide plate is fixedly connected to the side wall of the protection tube, and an electric clamp is fixedly installed on the bottom of the drone body.

[0012] Furthermore, the inner wall of the storage box is symmetrically provided with a plurality of slide grooves, the side walls of the protective net are fixedly connected with a plurality of counterweight blocks, the counterweight blocks slide inside the slide grooves, the side walls of the ejection plate are symmetrically fixedly connected with the connecting blocks, the side walls of the counterweight blocks close to the ejection plate are fixedly connected with pull ropes, and the ends of the pull ropes away from the counterweight blocks are fixedly connected to the side walls of the connecting blocks.

[0013] Furthermore, the control box is symmetrically fixedly connected to the side wall of the storage box, and limiting holes are symmetrically provided on the side wall of the storage box.

[0014] Furthermore, an electromagnet is fixedly connected to the inner wall of the control box, a permanent magnet is slidably connected to the inner wall of the control box, a stopper is fixedly connected to the side wall of the permanent magnet, an end of the stopper away from the permanent magnet is inserted into the storage box through a limiting hole, and an electric door is rotatably provided on the side wall of the storage box.

[0015] Furthermore, the inner wall of the control box is symmetrically provided with limiting grooves, the inner wall of the limiting groove is slidably connected with a slider, and the side wall of the slider is fixedly connected to the adjacent side wall of the permanent magnet.

[0016] Furthermore, a second spring is fixedly connected to the inner wall of the limiting groove, and one end of the second spring away from the electromagnet is fixedly connected to the adjacent side wall of the slider.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by providing structures such as airbags, compressed gas storage bottles and electric clamps, when the drone body enters an abnormal flight state, the inside of the airbag can be quickly inflated, and the airbag can protect the side walls of the medicine barrel and the feed pipe on the top. Even if the medicine barrel is broken due to impact force, the airbag will wrap the top of the medicine barrel and the feed pipe and other structures, so that the medicine inside the medicine barrel will not leak in large quantities, thereby reducing the possibility of pollution to the surrounding environment.

[0018] 2. In the present invention, by providing a first spring, a protective net, a counterweight and other structures, when the ejection plate drives the protective net to move out of the storage box, the gravity of the counterweight causes the protective net to have enough gravity, so that when it moves out of the storage box, it can fly farther, thereby better opening the entire protective net, and then the protective net is hung on the branches and leaves of the trees outside, preventing the drone body from directly contacting and colliding with the ground, and also preventing the drone body from falling or rolling to difficult-to-find areas such as valleys.

[0019] 3. In the present invention, by setting structures such as a block, an electromagnet and a permanent magnet, in the initial state, the block blocks the movement of the ejection plate. At this time, the first spring is in a compressed state. When the drone body produces an abnormal working state, the block moves back to the inside of the control box, and then the block quickly drives the protective net and the counterweight block to move out of the storage box under the elastic action of the first spring, thereby achieving the purpose of quickly popping out the protective net. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front view schematic diagram of the overall structure of the present invention; Figure 3 It is a schematic diagram of the structure of the spraying component and the protection component in the present invention; Figure 4 It is a schematic diagram of the internal structure of the spraying component and the protection component in the present invention; Figure 5 for Figure 4 A schematic diagram of the structure of part A in the middle; Figure 6 It is a schematic diagram of the structural position between the protection plate, the protection tube and the medicine barrel in the present invention; Figure 7 It is a schematic diagram of the structure of the protection plate in the present invention; Figure 8 This is a schematic diagram of the structure of the drone body and the protection components in the present invention; Fig. 9 It is a schematic diagram of the structure of the protection component in the present invention; Fig.10 It is a structural schematic diagram of the storage box in the present invention; Fig.11 It is a schematic diagram of the internal structure of the protection component in the present invention; Fig.12 It is a schematic diagram of the internal structure of the control box in the present invention.

[0021] In the figure: 1. UAV body; 2. Support frame; 3. Spraying assembly; 301. Fixed column; 302. Medicine barrel; 303. Discharge pipe; 304. Feed pipe; 305. Electric fan; 4. Protection assembly; 401. Storage box; 402. Ejection plate; 403. First spring; 404. Slide; 405. Protection net; 406. Counterweight; 407. Control box; 408. Limit hole; 409. Permanent magnet ...9. 10. Block; 411. Electromagnet; 412. Limiting groove; 413. Sliding block; 414. Second spring; 415. Electric door; 416. Connecting block; 417. Pull rope; 5. Protection assembly; 501. Protection tube; 502. Connecting piece; 503. Air bag; 504. Protection plate; 505. Compressed air storage bottle; 506. Jet tube; 507. Solenoid valve; 508. Guide plate; 509. Electric clamp. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with specific embodiments.

[0023] To solve the problem that when the spiral blades of the drone body 1 become loose, the drone body 1 enters an abnormal flight state, causing the drone body 1 to collide with trees or mountains, which in turn causes the medicine barrel 302 to rupture, and a large amount of medicine inside the medicine barrel 302 leaks, causing pollution to the surrounding environment, such as Figure 1 - Fig.12As shown: A pesticide spraying device for forestry pest control includes a drone body 1, a support frame 2 is fixedly connected to the bottom of the drone body 1, and the support frame 2 can support the drone body 1, so that when the drone body 1 lands or takes off, the drone body 1 will not directly contact the ground, thereby reducing the friction between the drone body 1 and the ground, reducing the loss of the drone body 1 due to friction, so as to increase the service life of the drone body 1, and a spraying component 3 is fixedly installed at the bottom of the drone body 1. The spraying component 3 is used to spray pesticides on forestry trees, and then treat pests in the trees to achieve the purpose of forestry pest control. A plurality of protective components 4 are fixedly installed on the side wall of the drone body 1. The protective component 4 can protect the drone body 1 when the drone body 1 rubs or collides with external trees or mountains due to improper operation by the user or damage of the spiral blades.

[0024] The spraying component 3 includes a fixed column 301, which is fixedly connected to the bottom of the drone body 1, and the fixed column 301 is fixedly connected to a medicine barrel 302. The top of the medicine barrel 302 is fixedly connected to a feed pipe 304, and the bottom of the medicine barrel 302 is fixedly connected to a discharge pipe 303. An electric fan 305 is fixedly installed inside the discharge pipe 303, and a protective component 5 is fixedly installed on the side wall of the medicine barrel 302. A protective cover is threadedly connected to the top of the feed pipe 304, so as to protect the top of the feed pipe 304 to prevent external dust, soil, etc. from entering the medicine barrel 302 during the spraying process and contaminating the medicine inside the medicine barrel 302. A corresponding control valve is arranged inside the discharge pipe 303 to control the opening and closing of the discharge pipe 303. When the spraying process is in progress, the discharge pipe 303 can be assisted to complete the spraying process by starting the electric fan 305.

[0025] The protection component 5 includes a protection tube 501, which is fixedly connected to the outer wall of the medicine barrel 302. The inner wall of the protection tube 501 and the outer wall of the medicine barrel 302 are slidably connected with an airbag 503. The airbag 503 wraps and protects the side wall of the medicine barrel 302. When the airbag 503 is in an initial state, there is some gas inside, which can protect the side wall of the medicine barrel 302. When the side wall of the protection tube 501 collides, it protects against the impact force generated by the collision.

[0026] The protection component 4 includes a storage box 401, which is fixedly connected to the side wall of the drone body 1. The inner wall of the storage box 401 is slidably connected with an ejection plate 402. The inner wall of the storage box 401 is fixedly connected with a first spring 403. One end of the first spring 403 away from the storage box 401 is fixedly connected to the side wall of the ejection plate 402. A protection net 405 is slidably connected inside the storage box 401, so that when the ejection plate 402 moves, it can push the protection net 405 to move.

[0027] The side wall of the protection tube 501 is fixedly connected with a connecting piece 502 , and the connecting piece 502 is fixedly connected to the side wall of the support frame 2 , thereby fixing the side wall of the protection tube 501 to ensure the stability of the protection tube 501 .

[0028] The side wall of the protection tube 501 is rotatably connected to a protection plate 504 via a hinge. In the initial state, the protection plate 504 blocks the gap between the protection tube 501 and the medicine barrel 302 to protect the airbag 503. Since the protection plate 504 is rotatably connected via a hinge and the hinge contains a torsion spring, the protection plate 504 will not rotate under normal conditions, and sufficient force is required to rotate the protection plate 504. The inner wall of the protection tube 501 is symmetrically fixedly connected to a compressed air storage bottle 505, and the compressed air storage bottle 505 stores compressed air.

[0029] A jet pipe 506 is fixedly connected to the top of the compressed air storage bottle 505, and the other end of the jet pipe 506 is fixedly connected to the side wall of the airbag 503. A solenoid valve 507 is fixedly installed on the side wall of the jet pipe 506, so that the solenoid valve 507 can control the air inside the compressed air storage bottle 505 to enter the airbag 503. When the drone body 1 produces an abnormal working state, the compressed air inside the compressed air storage bottle 505 quickly enters the airbag 503, and then fills the airbag 503 with air, so that the airbag 503 is quickly filled, and because the airbag 503 itself occupies most of the space inside the protective tube 501, if the airbag 503 is filled with air, the airbag 503 pushes the protective plate 504 to rotate and open, so that the airbag 503 extends out of the protective tube 501.

[0030] The side wall of the protective tube 501 is fixedly connected to a guide plate 508, and an electric clamp 509 is fixedly installed at the bottom of the drone body 1. When the airbag 503 extends out of the protective tube 501, under the guidance of the guide plate 508, the airbag 503 moves toward the fixed column 301, and then the electric clamp 509 is started to clamp the part of the airbag 503 extending out of the protective tube 501, so that the airbag 503 is like a plastic bag with its mouth fastened, and the top of the airbag 503 is clamped by the electric clamp 509 and is fixed to the fixed column 301. The side walls of 301 are tightly against each other, so when the drone body 1 is in an abnormal working state, causing the drone body 1 to collide with trees or mountains, the airbag 503 can protect the side walls of the medicine barrel 302 and the feed pipe 304 on the top. Even if the medicine barrel 302 is broken due to the impact force, the airbag 503 will wrap the top of the medicine barrel 302 and the feed pipe 304 and other structures, so that the medicine inside the medicine barrel 302 will not leak in large quantities, thereby reducing the possibility of pollution to the surrounding environment.

[0031] When the drone body 1 is spraying pesticides, the drone body 1 is moved to a suitable position for spraying, and then the discharge pipe 303 is opened and the electric fan 305 is started, so that the medicine in the medicine barrel 302 can be sprayed onto the trees to be sprayed.

[0032] During the spraying stage, if the drone body 1 produces an abnormal flight state, the gyroscope inside the drone body 1 detects the abnormal state. At this time, in order to protect the medicine barrel 302, the controller inside the drone body 1 controls the opening of the solenoid valve 507, and then controls the air inside the compressed air storage bottle 505 to quickly enter the airbag 503, and then fills the airbag 503 with air, so that the airbag 503 is quickly filled, and because the airbag 503 itself occupies most of the space inside the protective tube 501, if the airbag 503 is filled with air, the airbag 503 pushes the protective plate 504 to rotate and open, so that the airbag 503 extends out of the protective tube 501, and under the guidance of the guide plate 508, the airbag 503 moves toward the fixed column 301. Move, and then start the electric clamp 509 to clamp the part of the airbag 503 that extends out of the protective tube 501, so that the airbag 503 is like a plastic bag with the mouth tied tightly, and the top of the airbag 503 is clamped by the electric clamp 509 and tightly against the side wall of the fixed column 301, and then when the drone body 1 produces an abnormal working state, causing the drone body 1 to collide with trees or mountains, the airbag 503 can protect the side wall of the medicine barrel 302 and the feed pipe 304 on the top, etc. Even if the medicine barrel 302 is broken due to the impact force, the airbag 503 will wrap the top of the medicine barrel 302 and the feed pipe 304 and other structures, so that the medicine inside the medicine barrel 302 will not leak in large quantities, thereby reducing the possibility of pollution to the surrounding environment.

[0033] In order to solve the problem that the drone body 1 cannot be recovered if the drone body 1 directly falls into a difficult-to-find area such as a valley after the drone body 1 is in an abnormal flight state, Figure 8 - Fig.12 As shown: a plurality of slide grooves 404 are symmetrically provided on the inner wall of the storage box 401, a plurality of counterweight blocks 406 are fixedly connected to the side wall of the protection net 405, the counterweight blocks 406 slide inside the slide grooves 404, the side wall of the ejection plate 402 is symmetrically fixedly connected to the connecting block 416, the side wall of the counterweight block 406 close to the ejection plate 402 is fixedly connected to a pull rope 417, and the end of the pull rope 417 away from the counterweight block 406 is fixedly connected to the side wall of the connecting block 416, so that when the protection net 405 is moved out of the storage box 401, the gravity of the counterweight block 406 causes the protection net 405 to have enough gravity, so that it can fly farther when moving out of the storage box 401, thereby better opening the entire protection net 405, and because the pull rope 417 and the connecting block 416 are fixed, the protection net 405 will not be disconnected from the ejection plate 402.

[0034] The control box 407 is symmetrically fixedly connected to the side wall of the storage box 401, and the limiting holes 408 are symmetrically opened on the side wall of the storage box 401. The box opening of the control box 407 overlaps with the limiting holes 408, so that the block 410 can enter the interior of the storage box 401 through the limiting holes 408.

[0035] An electromagnet 411 is fixedly connected to the inner wall of the control box 407, and a permanent magnet 409 is slidably connected to the inner wall of the control box 407. A stopper 410 is fixedly connected to the side wall of the permanent magnet 409. The end of the stopper 410 away from the permanent magnet 409 is inserted into the storage box 401 through the limiting hole 408. An electric door 415 is rotatably provided on the side wall of the storage box 401, so that the stopper 410 can limit the movement of the ejection plate 402. In the initial state, the stopper 410 hinders the movement of the ejection plate 402. At this time, the first spring 403 is in a compressed state. When the drone body 1 produces an abnormal working state, the gyroscope inside the drone body 1 detects that the drone body 1 is moving abnormally, and then transmits a signal to the internal controller of the drone body 1 to energize the electromagnet 411. At this time, the electromagnet 411 generates suction, and then the permanent magnet 409 moves toward the electromagnet 411, and the permanent magnet 409 drives the stopper 410 to move, so that the ejection plate 402 can quickly move toward the box opening of the storage box 401 under the elastic action of the first spring 403, and open the electric door 415 in advance, so that there is no object blocking it at the box opening of the storage box 401, and then the ejection plate 402 pushes the counterweight block 406 and the protective net 405 to move outside the storage box 401, so that the protective net 405 is opened, and the protective net 405 is hung on the branches and leaves of the trees outside, and the pull rope 417 will not completely move out of the storage box 401, preventing the drone body 1 from directly contacting and colliding with the ground, and also preventing the drone body 1 from falling or rolling to valleys and other difficult-to-find areas.

[0036] The control box 407 has symmetrically arranged limit grooves 412 on its inner wall, and a slider 413 is slidably connected to the inner wall of the limit groove 412. The side wall of the slider 413 is fixedly connected to the adjacent side wall of the permanent magnet 409, thereby limiting the moving direction of the permanent magnet 409 and preventing the permanent magnet 409 from being misaligned during movement, so that the block 410 cannot move through the limit hole 408.

[0037] A second spring 414 is fixedly connected to the inner wall of the limiting groove 412. One end of the second spring 414 away from the electromagnet 411 is fixedly connected to the side wall of the adjacent slider 413. When the electromagnet 411 is powered off, the second spring 414 can drive the permanent magnet 409 to reset under the elastic action, and then drive the stopper 410 to reset.

[0038] When the drone body 1 is in an abnormal flight state, if it directly causes the drone body 1 to be unable to fly and causes the drone body 1 to fall from the air, the controller inside the drone body 1 simultaneously regulates and energizes the electromagnet 411. At this time, the electromagnet 411 generates suction, and the permanent magnet 409 moves toward the electromagnet 411 and drives the second spring 414 to be compressed. The permanent magnet 409 drives the stopper 410 to move. The first spring 403 is in a compressed state in the initial state. Then, when the stopper 410 no longer limits the ejection plate 402, the ejection plate 402 can quickly move toward the box opening of the storage box 401 under the elastic action of the first spring 403, and the ejection plate 402 can be lifted. The electric door 415 is opened in front, so that there is no object blocking the opening of the storage box 401, and then the ejection plate 402 pushes the counterweight block 406 and the protective net 405 to move outside the storage box 401, so that the protective net 405 is opened, and the protective net 405 is hung on the branches and leaves of the trees outside, and part of the pull rope 417 moves out of the storage box 401 with the protective net 405, and part of it stays in the storage box 401, thereby preventing the protective net 405 from being connected to the storage box 401 without an object, and the protective net 405 is hung on the branches of nearby trees to prevent the drone body 1 from directly contacting and colliding with the ground, and also prevents the drone body 1 from falling or rolling to valleys and other difficult-to-find areas.

[0039] Since the weight of the counterweight block 406 is heavier than that of the protective net 405, the gravitational potential energy of the protective net 405 is increased, so that when the protective net 405 performs free fall motion, there is sufficient acceleration. The protective net 405 can fly farther when moving out of the storage box 401, thereby better opening the entire protective net 405. After the drone body 1 is found, the protective net 405 is retracted into the storage box 401 again and the ejection plate 402 is pushed to reset, the electromagnet 411 is powered off, and then under the elastic action of the second spring 414, the block 410 is reset, and the movement trend of the ejection plate 402 is blocked again, which is convenient for subsequent reuse.

[0040] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pesticide spraying device for forest pest control, comprising an unmanned aerial vehicle body (1), characterized in that: The bottom of the drone body (1) is fixedly connected to a support frame (2), a spraying component (3) is fixedly installed on the bottom of the drone body (1), and a plurality of protective components (4) are fixedly installed on the side wall of the drone body (1); The spraying component (3) comprises a fixed column (301), the fixed column (301) is fixedly connected to the bottom of the drone body (1), the fixed column (301) is fixedly connected to a medicine barrel (302), the top of the medicine barrel (302) is fixedly connected to a feed pipe (304), the bottom of the medicine barrel (302) is fixedly connected to a discharge pipe (303), an electric fan (305) is fixedly installed inside the discharge pipe (303), and a protective component (5) is fixedly installed on the side wall of the medicine barrel (302); The protection assembly (5) comprises a protection tube (501), the protection tube (501) being fixedly connected to the outer wall of the medicine barrel (302), and the inner wall of the protection tube (501) and the outer wall of the medicine barrel (302) being slidably connected to an air bag (503); The protective assembly (4) comprises a storage box (401), the storage box (401) being fixedly connected to the side wall of the drone body (1), the inner wall of the storage box (401) being slidably connected to an ejection plate (402), the inner wall of the storage box (401) being fixedly connected to a first spring (403), one end of the first spring (403) away from the storage box (401) being fixedly connected to the side wall of the ejection plate (402), and the interior of the storage box (401) being slidably connected to a protective net (405).

2. The pesticide spraying device for forestry pest control according to claim 1, characterized in that: The side wall of the protection tube (501) is fixedly connected to a connecting piece (502), and the connecting piece (502) and the side wall of the support frame (2) are fixedly connected.

3. The pesticide spraying device for forestry pest control according to claim 2, characterized in that: The side wall of the protection cylinder (501) is rotatably connected to a protection plate (504) via a hinge, and the inner wall of the protection cylinder (501) is symmetrically fixedly connected to a compressed air storage bottle (505).

4. The pesticide spraying device for forestry pest control according to claim 3, characterized in that: The top of the compressed air storage bottle (505) is fixedly connected to an air jet pipe (506), the other end of the air jet pipe (506) is fixedly connected to the side wall of the air bag (503), and an electromagnetic valve (507) is fixedly installed on the side wall of the air jet pipe (506).

5. The pesticide spraying device for forestry pest control according to claim 4, characterized in that: The side wall of the protective tube (501) is fixedly connected to a guide plate (508), and the bottom of the drone body (1) is fixedly mounted with an electric clamp (509).

6. The pesticide spraying device for forestry pest control according to claim 1, characterized in that: The inner wall of the storage box (401) is symmetrically provided with a plurality of slide grooves (404); the side wall of the protection net (405) is fixedly connected with a plurality of counterweight blocks (406); the counterweight blocks (406) slide inside the slide grooves (404); the side wall of the ejection plate (402) is symmetrically fixedly connected with a connecting block (416); the side wall of the counterweight block (406) close to the ejection plate (402) is fixedly connected with a pull rope (417); and one end of the pull rope (417) away from the counterweight block (406) is fixedly connected to the side wall of the connecting block (416).

7. The pesticide spraying device for forestry pest control according to claim 6, characterized in that: The control box (407) is symmetrically fixedly connected to the side wall of the storage box (401), and the limiting holes (408) are symmetrically provided on the side wall of the storage box (401).

8. The pesticide spraying device for forestry pest control according to claim 7, characterized in that: An electromagnet (411) is fixedly connected to the inner wall of the control box (407), a permanent magnet (409) is slidably connected to the inner wall of the control box (407), a stopper (410) is fixedly connected to the side wall of the permanent magnet (409), an end of the stopper (410) away from the permanent magnet (409) is inserted into the storage box (401) through a limiting hole (408), and an electric door (415) is rotatably provided on the side wall of the storage box (401).

9. The pesticide spraying device for forestry pest control according to claim 8, characterized in that: The control box (407) has symmetrically disposed inner walls with limit slots (412), the inner walls of the limit slots (412) are slidably connected with sliders (413), and the side walls of the sliders (413) are fixedly connected to the adjacent side walls of the permanent magnets (409).

10. The pesticide spraying device for forest pest control according to claim 9, characterized in that: A second spring (414) is fixedly connected to the inner wall of the limiting groove (412), and one end of the second spring (414) away from the electromagnet (411) is fixedly connected to the side wall of the adjacent slider (413).

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