Field pesticide-killing covering spraying device and method of use thereof

Abstract

The application relates to the technical field of pesticide spraying devices, in particular to a covering pesticide spraying device based on farmland pest killing and a using method thereof, which comprises a traction device and a pesticide conveying assembly, one side of the traction device is fixedly connected with the pesticide conveying assembly, one side of the pesticide conveying assembly is fixedly connected with a rotating assembly, the lower end of the pesticide conveying assembly is fixedly connected with an elevation adjusting assembly, the outer side of the elevation adjusting assembly is fixedly connected with a rotary arm assembly, the outer side of the rotary arm assembly is fixedly connected with a pesticide spraying assembly, the rotating assembly comprises a servo motor, the tail end of the main shaft of the servo motor is fixedly connected with a fixed wheel rotating roller, the outer side of the fixed wheel rotating roller is fixedly connected with a first rotating wheel, the first rotating wheel is rotationally connected with a second rotating wheel through a toothed belt, and the elevation adjusting assembly comprises an inner shaft column, the outer side of the inner shaft column is rotationally connected with an inner hollow cylinder, in the application, the device has design advantages in improving pesticide spraying efficiency, ensuring pesticide spraying uniformity and adapting to different crop growth conditions, and can help improve the quality and effect of farmland pest killing operation.

Description

Technical Field

[0001] This invention relates to the field of spraying device technology, specifically to a mulch spraying device for agricultural pest control and its usage method. Background Technology

[0002] The mulch spraying device for agricultural pest control is a highly efficient agricultural machine. It achieves extensive coverage and effective control of pests by evenly spraying insecticides onto crops. The sprayer is a device that uses air suction to turn pesticides or other liquids into a mist and spray it evenly onto other objects. In rural areas, the sprayer is an indispensable and important agricultural tool for preventing and controlling diseases and pests of young crops in farmland.

[0003] Whether or not to spray both the roots and leaves when spraying pesticides on crops depends on the type of pest, the type of pesticide, and the growth stage of the crop. If the pests mainly live on the leaves of the crop, such as aphids and mites, then the focus of the spraying should be on the leaves. If the pests cause damage to the roots, such as root-knot nematodes, then the roots need to be sprayed.

[0004] Traditional spraying devices often use a single spraying mode. This mode cannot be optimized and adjusted according to specific pest species, the characteristics of the pesticides used, and the specific growth stage of the crops. As a result, the spraying operation may not be able to effectively cover all target pests, resulting in incomplete pest control and reducing the overall spraying effect. Therefore, in order to address the above problems, a mulching spraying device for agricultural pest control and its usage method are proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a mulch spraying device for agricultural pest control and its usage method, in order to solve the problem that traditional spraying devices often use a single spraying mode. This mode cannot be optimized and adjusted according to specific pest species, the characteristics of the pesticide used, and the specific growth stage of the crop, which may result in the spraying operation failing to effectively cover all target pests, thus causing incomplete pest control.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A mulch spraying device for agricultural pest control and its usage method include a traction device and a pesticide delivery assembly. The pesticide delivery assembly is fixedly connected to one side of the traction device, and a rotating assembly is fixedly connected to one side of the pesticide delivery assembly. A height adjustment assembly is fixedly connected to the lower end of the pesticide delivery assembly. A rotating arm assembly is fixedly connected to the outer side of the height adjustment assembly, and a spraying assembly is fixedly connected to the outer side of the rotating arm assembly. The rotating assembly includes a servo motor, and a fixed roller is fixedly connected to the end of the servo motor's main shaft. A first rotating wheel is fixedly connected to the outer side of the fixed roller, and a second rotating wheel is rotatably connected to the first rotating wheel via a toothed belt. The height adjustment assembly includes an inner shaft column, and an inner hollow cylinder is rotatably connected to the outer side of the inner shaft column. A lower support arm is fixedly connected to one side, and a limiting ring is fixedly connected to the outer side of the lower support arm. A first flexible hose is installed inside the limiting ring. The rotating arm assembly includes a rotating plate, and an inner column is rotatably connected to the rotating plate via a bearing. A semi-through column is fixedly connected to one side of the inner column, and a gravity cone is fixedly connected to the bottom end of the semi-through column. The spraying assembly includes an ear seat, and a seat hole is opened on the inner side of the ear seat. An inner hollow column is rotatably connected to the inner side of the seat hole of the ear seat. A mist nozzle is fixedly connected to one side of the inner hollow column, and a second flexible hose is fixedly connected to one side of the mist nozzle. A spring telescopic rod is fixedly connected to one side of the ear seat, and a spring retaining plate is fixedly connected to one side of the spring telescopic rod. A locking rod is fixedly connected to one side of the spring retaining plate.

[0008] As a further optimization of the present invention, the drug delivery assembly includes an upper shelf plate, a double sliding column fixedly connected to the bottom end of the upper shelf plate, an electric telescopic rod fixedly connected to the bottom end of the upper shelf plate, a movable plate fixedly connected to the bottom end of the electric telescopic rod, a limit hole opened on the inner side of the movable plate, a water pump fixedly connected to the top end of the movable plate, a drug storage tank fixedly connected to the bottom end of the movable plate, and a multi-channel pipe fixedly connected to the top end of the movable plate.

[0009] As a further optimization of the present invention, the double sliding pillars are in the shape of two cylindrical sections, the number of double sliding pillars is four, the opening shape of the limiting straight hole is cylindrical, the limiting straight hole penetrates the inner side of the movable plate, and the double sliding pillars are slidably connected to the inner side of the limiting straight hole in the movable plate.

[0010] As a further optimization of the present invention, the movable plate has a through hole on its inner side near the water pump, the water inlet pipe of the water pump passes through the through hole of the movable plate, the water inlet pipe of the water pump is connected to the interior of the lower end of the medicine storage tank, the water outlet pipe of the water pump is connected to the inner side of the multi-way pipe, the outer side of the multi-way pipe is fixedly connected to one end of the first flexible hose, and the inner side of the multi-way pipe is connected to the inner side of the first flexible hose.

[0011] As a further optimization of the present invention, the bottom end of the movable plate is fixedly connected to a bracket, the body of the servo motor is fixedly connected to the bracket at the lower end of the movable plate, the fixed roller is cylindrical in shape, and the fixed roller is rotatably connected to the inner side of the bracket at the lower end of the movable plate.

[0012] As a further optimization of the present invention, the first rotating wheel has the same shape as the second rotating wheel, and teeth are installed on the outer side of the middle end of both the first and second rotating wheels. Teeth are installed on the inner side of the toothed belt. The outer side of the first rotating wheel meshes with the inner side of the toothed belt, and the outer side of the second rotating wheel meshes with the inner side of the first rotating wheel.

[0013] As a further optimization of the present invention, the following features are provided: the top end of the lower support arm is fixedly connected to the bottom end of the movable plate; the inner side of the first hose is hollow; the limiting ring is installed through the inside of the first hose; one side of the first hose is fixedly connected to one side of the inner bore column; the inner side of the first hose communicates with the inside of the inner bore column; the inner shaft column is cylindrical; a limiting ring is installed on the outer side of the inner shaft column; a limiting groove is formed on the inner side of the inner hollow cylinder; and the inner side of the second rotating wheel is fixedly connected to the outer side of the inner shaft column.

[0014] As a further optimization of the present invention, the inner sides of the inner column and the semi-through column are hollow, the inner side of the inner column is connected to the inner side of the semi-through column, the inner side of the semi-through column is connected to the inner side of the second hose, the outer side of the semi-through column is fixedly connected to one end of the second hose, and a straight hole is opened on the inner side of the rotating plate near the bearing.

[0015] As a further optimization of the present invention, wherein: one side of the ear seat is fixedly connected to the outer side of the semi-through column, the number of ear seats in each group is two, the inner hollow column is hollow in shape, the seat hole is cylindrical in shape, an insertion hole is provided on the inner side of the inner hollow column, one end of the locking rod is octagonal in shape, one end of the locking rod slides inside the inner hollow column, and the second hose is connected to the inner side of the mist nozzle.

[0016] Methods for using mulch spraying devices for pest control in farmland.

[0017] S1: When adjusting the spraying range according to the crop's growth stage, the servo motor drives the fixed roller to rotate. The fixed roller is connected to the inner side of the bracket at the lower end of the movable plate. The rotation of the fixed roller simultaneously drives all the first rollers to rotate. The first rollers drive the second rollers, which are meshed with the toothed belt on the outside, to rotate. The rotation of the second rollers drives the inner shaft column, which is fixedly connected on the inside, to rotate. The inner shaft column is connected to the inner side of the lower support arm. The first hose deforms. The rotation of the inner shaft column drives the rotating plate, which is fixedly connected on the outside, to rotate. The rotating plate drives the spraying components at both ends to rotate. The electric telescopic rod drives the movable plate to move downward. The movable plate is slidably connected to the outside of the double sliding column through the limiting straight hole. The movement of the movable plate drives the height adjustment component, the rotating arm component, and the spraying component to move downward.

[0018] S2: When spraying pesticides on the leaves and roots of crops simultaneously, the inner column is rotatably connected to the inside of the rotating plate through the bearing. The inner column will automatically rotate inside the rotating plate. The water pump draws pesticides from the inside of the storage tank. The pesticides enter the inside of the multi-way pipe from the outlet pipe of the water pump. From the inside of the multi-way pipe, they flow into the inside of the first hose. The pesticides enter the inside of the two bearings from the inside of the first hose. Then, the pesticides enter the inside of the semi-through column through the bearings. Then, the pesticides enter the inside of the second hose through the inside of the semi-through column. Finally, the pesticides are sprayed out in the form of a mist through the mist nozzle.

[0019] S3: To adjust the spray angle of the mist nozzle, pull the locking rod so that one end of the locking rod slides out of the inner hollow column. The locking rod drives the fixed spring plate to move, and the fixed spring plate drives the spring telescopic rod to extend. Then rotate the mist nozzle. The mist nozzle is rotatably connected to the seat hole opened in the ear seat through the inner hollow column. Under the elastic contraction of the spring telescopic rod, the locking rod is moved so that one end of the locking rod slides into the inner hollow column.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. In this invention, by using a servo motor, height adjustment component and rotating plate, the device achieves precise adjustment of the spraying height according to the crop growth stage. This adjustment mechanism enables the spraying device to adapt to crops of different heights, ensuring that pesticides can be sprayed evenly on the leaves and roots of the crops, thus improving the accuracy and efficiency of spraying.

[0022] 2. In this invention, the device can spray pesticides on the leaves and roots of crops simultaneously through the inner column and the second hose. This design is tailored to the living habits of different pests, ensuring that the pesticides can directly act on the parts where the pests are located, improving the insecticidal effect, while also reducing the amount of pesticides used and reducing the impact on the environment.

[0023] 3. In this invention, the device can adjust the spraying angle of the mist nozzle according to actual needs through the set hollow column and locking rod. This angle adjustment function improves the coverage of pesticide spraying, ensures that the pesticide can be evenly covered on the crop surface, reduces the spraying dead angle caused by leaf shading, and improves the uniformity and effect of spraying. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the active panel structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the traction device structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the rotating component structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the height adjustment component structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the rotating plate structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the gravity cone structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the spraying component structure of the present invention.

[0032] In the diagram: 1. Traction device;

[0033] 2. Drug delivery assembly; 21. Upper shelf plate; 22. Double sliding column; 23. Electric telescopic rod; 24. Movable plate; 25. Limiting straight hole; 26. Water pump; 27. Drug storage tank; 28. Multi-port pipeline;

[0034] 3. Rotating assembly; 31. Servo motor; 32. Fixed roller; 33. First roller; 34. Toothed belt; 35. Second roller;

[0035] 4. Height adjustment assembly; 41. Inner shaft column; 42. Inner hollow cylinder; 43. Lower support arm; 44. Limiting ring; 45. First flexible hose;

[0036] 5. Slewing arm assembly; 51. Rotating plate; 52. Bearing; 53. Inner bore column; 54. Semi-through column; 55. Gravity cone;

[0037] 6. Spraying assembly; 61. Ear seat; 62. Seat hole; 63. Hollow column; 64. Mist nozzle; 65. Second hose; 66. Spring telescopic rod; 67. Spring retaining plate; 68. Locking rod. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] Please see Figure 1-8 The present invention provides a technical solution:

[0041] A mulch spraying device for agricultural pest control and its usage method include a traction device 1 and a pesticide delivery assembly 2. The pesticide delivery assembly 2 is fixedly connected to one side of the traction device 1, and a rotating assembly 3 is fixedly connected to one side of the pesticide delivery assembly 2. A height adjustment assembly 4 is fixedly connected to the lower end of the pesticide delivery assembly 2. A rotating arm assembly 5 is fixedly connected to the outside of the height adjustment assembly 4, and a spraying assembly 6 is fixedly connected to the outside of the rotating arm assembly 5. The rotating assembly 3 includes a servo motor 31, a fixed roller 32 is fixedly connected to the end of the servo motor 31's main shaft, a first rotating wheel 33 is fixedly connected to the outside of the fixed roller 32, and a second rotating wheel 35 is rotatably connected to the first rotating wheel 33 via a toothed belt 34. The height adjustment assembly 4 includes an inner shaft column 41, an inner cylinder 42 is rotatably connected to the outside of the inner shaft column 41, and a lower support is fixedly connected to one side of the inner cylinder 42. The arm 43 has a limiting ring 44 fixedly connected to its outer side, and a first flexible hose 45 is installed inside the limiting ring 44. The rotating arm assembly 5 includes a rotating plate 51, which is rotatably connected to an inner hole column 53 via a bearing 52. A semi-through column 54 is fixedly connected to one side of the inner hole column 53, and a gravity cone 55 is fixedly connected to the bottom end of the semi-through column 54. The spraying assembly 6 includes an ear seat 61, which has a seat hole 62 on its inner side. An inner hollow column 63 is rotatably connected to the seat hole 62 on the inner side of the ear seat 61. A mist nozzle 64 is fixedly connected to one side of the inner hollow column 63, and a second flexible hose 65 is fixedly connected to one side of the mist nozzle 64. A spring telescopic rod 66 is fixedly connected to one side of the ear seat 61, and a spring retaining plate 67 is fixedly connected to one side of the spring telescopic rod 66. A locking rod 68 is fixedly connected to one side of the spring retaining plate 67.

[0042] As a further implementation of this solution, the drug delivery assembly 2 includes an upper frame plate 21, with double sliding columns 22 fixedly connected to the bottom end of the upper frame plate 21, an electric telescopic rod 23 fixedly connected to the bottom end of the upper frame plate 21, a movable plate 24 fixedly connected to the bottom end of the electric telescopic rod 23, a limiting straight hole 25 opened on the inner side of the movable plate 24, a water pump 26 fixedly connected to the top end of the movable plate 24, a drug storage box 27 fixedly connected to the bottom end of the movable plate 24, and a multi-way pipe 28 fixedly connected to the top end of the movable plate 24. The double sliding columns 22 are two cylindrical sections, and there are four double sliding columns 22. The limiting straight hole 25 is cylindrical and penetrates the inner side of the movable plate 24. The double sliding columns 22 are slidably connected to the inner side of the limiting straight hole 25 opened in the movable plate 24. The device can operate stably at different crop heights. The four cylindrical sections of the double sliding columns 22 and the cylindrical shape of the limiting straight hole 25 provide multiple connection points, enhancing the stability of the overall structure and its ability to adapt to different crops.

[0043] As a further implementation of this solution, the movable plate 24 has a through hole on the inner side near the water pump 26. The water inlet pipe of the water pump 26 passes through the through hole of the movable plate 24. The water inlet pipe of the water pump 26 is connected to the interior of the lower end of the pesticide storage tank 27. The water outlet pipe of the water pump 26 is connected to the inner side of the multi-way pipe 28. The outer side of the multi-way pipe 28 is fixedly connected to one end of the first hose 45. The inner side of the multi-way pipe 28 is connected to the inner side of the first hose 45, ensuring the efficient flow of pesticides from storage to spraying. The hollow design of the first hose 45 and the insertion of the limiting ring 44 further ensure the uniformity and continuity of pesticide flow.

[0044] As a further implementation of this solution, a bracket is fixedly connected to the bottom of the movable plate 24. The body of the servo motor 31 is fixedly connected to the bracket at the bottom of the movable plate 24. The fixed roller 32 is cylindrical and is rotatably connected to the inner side of the bracket at the bottom of the movable plate 24. The shape of the first roller 33 is the same as that of the second roller 35. Teeth are installed on the outer side of the middle of both the first roller 33 and the second roller 35. Teeth are installed on the inner side of the toothed belt 34. The outer side of the first roller 33 meshes with the inner side of the toothed belt 34, and the outer side of the second roller 35 meshes with the inner side of the first roller 33. This improves the transmission efficiency and ensures the precise control of the spraying device. The meshing design of the toothed belt 34 and the second roller 35 allows for precise adjustment of the position and angle of the spraying components.

[0045] As a further implementation of this solution, the top of the lower support arm 43 is fixedly connected to the bottom of the movable plate 24. The inner side of the first hose 45 is hollow, and the limiting ring 44 is installed through the inside of the first hose 45. One side of the first hose 45 is fixedly connected to one side of the inner hole column 53. The inner side of the first hose 45 is connected to the inside of the inner hole column 53. The inner shaft column 41 is cylindrical in shape, and a limiting ring is installed on the outer side of the inner shaft column 41. A limiting groove is opened on the inner side of the inner hollow cylinder 42. The inner side of the second rotating wheel 35 is fixedly connected to the outer side of the inner shaft column 41, providing stable support and precise positioning. The cylindrical shape of the inner shaft column 41 and the limiting ring, as well as the limiting groove of the inner hollow cylinder 42, ensure the stability and accuracy of the components during the spraying process.

[0046] As a further implementation of this scheme, the inner sides of the inner column 53 and the semi-through column 54 are hollow. The inner side of the inner column 53 is connected to the inner side of the semi-through column 54, and the inner side of the semi-through column 54 is connected to the inner side of the second hose 65. The outer side of the semi-through column 54 is fixedly connected to one end of the second hose 65. The rotating plate 51 has a straight hole on its inner side near the bearing 52, which allows the pesticide to be evenly distributed inside the device before spraying. The straight hole design of the rotating plate 51 further optimizes the distribution and spraying efficiency of the pesticide.

[0047] As a further implementation of this solution, one side of the ear seat 61 is fixedly connected to the outside of the semi-through column 54. There are two ear seats 61 in each group. The hollow column 63 is hollow in shape, and the seat hole 62 is cylindrical. An insertion hole is provided on the inner side of the hollow column 63. One end of the locking rod 68 is octagonal in shape and slides inside the hollow column 63. The second hose 65 is connected to the inner side of the mist nozzle 64, allowing the user to flexibly adjust the spraying angle according to the crop layout and spraying needs. The hollow cylindrical shape of the hollow column 63 and the octagonal shape of the locking rod 68 provide a stable and flexible angle adjustment mechanism.

[0048] Workflow: When adjusting the spraying range according to the crop's growth stage, the traction device 1 moves the entire device to the farmland, positioning the height adjustment component 4 between the crops. Based on the height between the crop leaves and roots, the servo motor 31 is activated, driving the fixed roller 32 to rotate. The fixed roller 32 is rotatably connected to the inner side of the support at the lower end of the movable plate 24, improving its stability during rotation. Simultaneously, the rotation of the fixed roller 32 drives all the first rollers 33 to rotate. The first rollers 33, through the outer meshing toothed belt 34, drive the second rollers 35 meshing with the toothed belt 34 to rotate. The rotation of the second rollers 35 drives the inner shaft column 41, which is fixedly connected to the inner side, to rotate. The inner shaft column 41 is rotatably connected to the inner side of the lower support arm 43, limiting its rotation direction. The lower support arm 43 supports the inner shaft column 41 and the rotating arm assembly 5. When the inner shaft column 41 rotates, the first hose 45 undergoes a certain deformation. The first hose 45 is a flexible hose and does not obstruct the delivery of pesticides after the inner shaft column 41 rotates. The rotation of the inner shaft column 41 drives the rotating plate 51 fixedly connected to the outside to rotate. The rotating plate 51 drives the spraying components 6 at both ends to rotate. When the distance between the spraying components 6 at both ends of the rotating plate 51 is about the same as the height of the crop, the electric telescopic rod 23 is activated. The electric telescopic rod 23 drives the movable plate 24 fixed at the bottom to move downward. The movable plate 24 is slidably connected to the outside of the double sliding column 22 through the limiting straight hole 25. The double sliding column 22 plays a role in limiting the movement of the movable plate 24. At the same time, the double sliding column 22 plays a role in stabilizing the movable plate 24. The movement of the movable plate 24 drives the height adjustment component 4, the rotating arm component 5 and the spraying component 6 to move downward. When the spraying component 6 at the lower end of the rotating plate 51 is about 20 to 30 centimeters from the ground, the downward movement of the device stops. At this time, the spraying range can be precisely adjusted according to the growth stage of the crop.

[0049] When spraying pesticides simultaneously on the leaves and roots of crops, the principle is the same as described above. As the rotating plate 51 rotates, the inner column 53 is rotatably connected to the inner side of the rotating plate 51 via the bearing 52. Under the gravity of the gravity cone 55, the semi-through column 54 and the inner column 53 remain facing the ground. Thus, when the rotating plate 51 rotates, the inner column 53 automatically rotates to the inner side of the rotating plate 51, keeping the spraying angle of the mist nozzle 64 constant. The water pump 26 is activated to draw pesticides from the storage tank 27. The pesticides enter the multi-way pipe 28 from the outlet pipe of the water pump 26, and then exit from the multi-way pipe 28. The pesticide flows into the first hose 45, and the limiting ring 44 protects the first hose 45 to prevent it from coming out of the limiting ring 44. The pesticide enters the two bearings 52 from the first hose 45, and then enters the semi-through column 54 from the bearings 52. The pesticide then enters the second hose 65 from the semi-through column 54, and is then sprayed out from the mist nozzle 64 in a mist form. The upper mist nozzle 64 sprays the leaves of the crop, and the lower mist nozzle 64 sprays the base of the crop, thus achieving a mulch-type pest control.

[0050] When adjusting the spray angle of the mist nozzle 64, pull the locking rod 68 so that one end of the locking rod 68 slides out of the inner hollow column 63. The locking rod 68 drives the spring plate 67 to move, and the spring plate 67 drives the spring telescopic rod 66 to extend. Then rotate the mist nozzle 64. The mist nozzle 64 is rotatably connected to the seat hole 62 of the ear seat 61 through the inner hollow column 63, which serves to limit the rotation of the inner hollow column 63. After the angle of the mist nozzle 64 is adjusted, release the locking rod 68. Under the elastic contraction of the spring telescopic rod 66, the locking rod 68 moves, so that one end of the locking rod 68 slides into the inner hollow column 63, which serves to limit the inner hollow column 63. Adjusting the angle of the mist nozzle 64 can improve the coverage of the sprayed medicine and prevent the sprayed medicine from being blocked by some leaves.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mulch spraying device for agricultural pest control, comprising a traction device (1) and a pesticide delivery assembly (2), characterized in that: The traction device (1) is fixedly connected to a drug delivery assembly (2) on one side, and a rotating assembly (3) is fixedly connected to a side of the drug delivery assembly (2). A height adjustment assembly (4) is fixedly connected to the lower end of the drug delivery assembly (2). A rotating arm assembly (5) is fixedly connected to the outside of the height adjustment assembly (4). A spraying assembly (6) is fixedly connected to the outside of the rotating arm assembly (5). The rotating assembly (3) includes a servo motor (31). A fixed roller (32) is fixedly connected to the end of the main shaft of the servo motor (31). A first roller (33) is fixedly connected to the outside of the fixed roller (32). The first roller (33) is rotatably connected to a second roller (35) via a toothed belt (34). The height adjustment assembly (4) includes an inner shaft column (41). An inner cylinder (42) is rotatably connected to the outer side of an inner shaft column (41). A lower support arm (43) is fixedly connected to one side of the inner cylinder (42). A limiting ring (44) is fixedly connected to the outer side of the lower support arm (43). A first flexible hose (45) is installed inside the limiting ring (44). The rotating arm assembly (5) includes a rotating plate (51). An inner hole column (53) is rotatably connected to the rotating plate (51) via a bearing (52). A semi-through column (54) is fixedly connected to one side of the inner hole column (53). A gravity cone (55) is fixedly connected to the bottom end of the semi-through column (54). The spraying assembly (6) includes an ear seat (61). A seat hole (62) is opened inside the ear seat (61). The seat hole (62) opened inside the ear seat (61) is rotatably connected to the inner side of the ear seat (61). A hollow column (63) is connected to the first flexible tube (45). A mist nozzle (64) is fixedly connected to one side of the hollow column (63). A second flexible tube (65) is fixedly connected to one side of the mist nozzle (64). A spring telescopic rod (66) is fixedly connected to one side of the ear seat (61). A spring plate (67) is fixedly connected to one side of the spring telescopic rod (66). A locking rod (68) is fixedly connected to one side of the spring plate (67). The top of the lower support arm (43) is fixedly connected to the bottom of the movable plate (24). The inner side of the first flexible tube (45) is hollow. The limiting ring (44) is installed through the inside of the first flexible tube (45). One side of the first flexible tube (45) is fixedly connected to one side of the inner hole column (53). The inner side of the first flexible tube (45) is fixedly connected to the inner hole column. (53) is internally connected. The inner shaft column (41) is cylindrical. A limit ring is installed on the outer side of the inner shaft column (41). A limit groove is opened on the inner side of the inner hollow cylinder (42). The inner side of the second rotating wheel (35) is fixedly connected to the outer side of the inner shaft column (41). The inner sides of the inner hole column (53) and the semi-through column (54) are hollow. The inner side of the inner hole column (53) is connected to the inner side of the semi-through column (54). The inner side of the semi-through column (54) is connected to the inner side of the second flexible tube (65). The outer side of the semi-through column (54) is fixedly connected to one end of the second flexible tube (65). A straight hole is opened on the inner side of the rotating plate (51) near the bearing (52). One side of the ear seat (61) is fixedly connected to the outer side of the semi-through column (54).Each set of ear seats (61) consists of two pieces. The hollow inner column (63) is a hollow cylinder. The seat hole (62) is cylindrical. An insertion hole is provided on the inner side of the hollow inner column (63). One end of the locking rod (68) is octagonal and is slidably connected to the inside of the hollow inner column (63). The second flexible hose (65) is connected to the inner side of the mist nozzle (64).

2. The mulch spraying device for agricultural pest control according to claim 1, characterized in that: The drug delivery assembly (2) includes an upper shelf plate (21), a double sliding column (22) is fixedly connected to the bottom end of the upper shelf plate (21), an electric telescopic rod (23) is fixedly connected to the bottom end of the upper shelf plate (21), a movable plate (24) is fixedly connected to the bottom end of the electric telescopic rod (23), a limit hole (25) is opened on the inner side of the movable plate (24), a water pump (26) is fixedly connected to the top end of the movable plate (24), a drug storage box (27) is fixedly connected to the bottom end of the movable plate (24), and a multi-port pipe (28) is fixedly connected to the top end of the movable plate (24).

3. The mulch spraying device for agricultural pest control according to claim 2, characterized in that: The shape of the double sliding column (22) is two cylindrical sections. There are four double sliding columns (22). The shape of the limiting straight hole (25) is cylindrical. The limiting straight hole (25) penetrates the inner side of the movable plate (24). The double sliding column (22) is slidably connected to the inner side of the limiting straight hole (25) opened in the movable plate (24).

4. The mulch spraying device for agricultural pest control according to claim 3, characterized in that: The movable plate (24) has a through hole on the inner side near the water pump (26). The water inlet pipe of the water pump (26) passes through the through hole of the movable plate (24). The water inlet pipe of the water pump (26) is connected to the interior of the lower end of the medicine storage tank (27). The water outlet pipe of the water pump (26) is connected to the inner side of the multi-way pipe (28). The outer side of the multi-way pipe (28) is fixedly connected to one end of the first hose (45). The inner side of the multi-way pipe (28) is connected to the inner side of the first hose (45).

5. The mulch spraying device for agricultural pest control according to claim 4, characterized in that: The bottom end of the movable plate (24) is fixedly connected to a bracket. The body of the servo motor (31) is fixedly connected to the bracket at the bottom end of the movable plate (24). The fixed roller (32) is cylindrical in shape and is rotatably connected to the inner side of the bracket at the bottom end of the movable plate (24).

6. The mulch spraying device for agricultural pest control according to claim 5, characterized in that: The first rotating wheel (33) has the same shape as the second rotating wheel (35). Teeth are installed on the outer side of the middle end of the first rotating wheel (33) and the second rotating wheel (35). Teeth are installed on the inner side of the toothed belt (34). The outer side of the first rotating wheel (33) meshes with the inner side of the toothed belt (34), and the outer side of the second rotating wheel (35) meshes with the inner side of the toothed belt (34).

7. A method of using a mulch spraying device for agricultural pest control as described in claim 6, characterized in that: S1: When adjusting the spraying range according to the crop growth stage, the servo motor (31) drives the fixed roller (32) to rotate. The fixed roller (32) is rotatably connected to the inner side of the bracket at the lower end of the movable plate (24). The rotation of the fixed roller (32) simultaneously drives all the first rollers (33) to rotate. The first rollers (33) drive the second rollers (35) meshed with the toothed belt (34) on the outer side to rotate. The rotation of the second rollers (35) drives the inner shaft column (41) fixedly connected on the inner side to rotate. The inner shaft column (41) is rotatably connected to the inner side of the lower support arm (43). The first hose (45) deforms. The inner shaft column (41) rotates, causing the outer fixedly connected rotating plate (51) to rotate. The rotating plate (51) causes the spraying assemblies (6) at both ends to rotate. The electric telescopic rod (23) causes the movable plate (24) to move downward. The movable plate (24) is slidably connected to the outer side of the double sliding column (22) through the limiting straight hole (25). The movement of the movable plate (24) causes the height adjustment assembly (4), the rotating arm assembly (5) and the spraying assembly (6) to move downward. S2: When spraying pesticides on the leaves and roots of crops simultaneously, the inner column (53) is rotatably connected to the inside of the rotating plate (51) through the bearing (52). The water pump (26) draws pesticides from the inside of the storage tank (27). The pesticides enter the inside of the multi-way pipe (28) from the outlet pipe of the water pump (26). They flow into the inside of the first hose (45) from the inside of the multi-way pipe (28). The pesticides enter the inside of the two bearings (52) from the inside of the first hose (45). Then the pesticides enter the inside of the semi-through column (54) through the bearings (52). Then the pesticides enter the inside of the second hose (65) through the inside of the semi-through column (54). Finally, the pesticides are sprayed out in the form of a mist through the mist nozzle (64). S3: When adjusting the spray angle of the mist nozzle (64), pull the locking rod (68) so that one end of the locking rod (68) slides out of the inner hollow column (63). The locking rod (68) drives the fixed spring plate (67) to move. The fixed spring plate (67) drives the spring telescopic rod (66) to extend. Then rotate the mist nozzle (64). The mist nozzle (64) is rotatably connected to the seat hole (62) opened in the ear seat (61) through the inner hollow column (63). Under the elastic contraction of the spring telescopic rod (66), the locking rod (68) is driven to move, so that one end of the locking rod (68) slides into the inner hollow column (63).

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