Mixing device for root-knot nematode prevention and use method thereof

Abstract

The invention discloses a mixing device for root-knot nematode prevention and control and a using method thereof.The mixing device comprises a moving mechanism, the moving mechanism comprises a moving supporting frame, a pesticide box is arranged at one end of the moving supporting frame, a pesticide spraying rod is arranged below the pesticide box, and a driving wheel and a driven wheel are arranged at the two ends of the bottom of the moving supporting frame respectively; the device is used for driving devices to move in the seedling direction. The seedlings are accurately positioned through the CDD camera, and the controller is matched to control the lifting of the moving mechanism and the transparent cover, so that the fertilizer and the liquid medicine can be accurately applied to the peripheries of the seedlings, and the damage caused by direct contact with the seedlings is avoided; the pesticide spraying rod is driven by the driving part to swing back and forth, so that pesticide liquid can be uniformly sprayed, and the pesticide spraying effect is improved; the stirring shaft and the shaftless spiral blade are arranged in the mixing barrel, the stirring motor drives the stirring shaft to rotate, and meanwhile the shaftless spiral blade is driven to rotate in the conveying pipe, so that the fertilizer is circularly mixed up and down, and the mixing efficiency and uniformity are improved.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco planting, and in particular to a mixing device for controlling root-knot nematodes and a use method thereof. Background Art

[0002] Tobacco root-knot nematodes are a common soil-borne disease in tobacco cultivation. They infect tobacco roots, causing root swelling and deformity, affecting the absorption of water and nutrients. In severe cases, they can lead to poor plant growth, reduced yields, and even death. Therefore, the prevention and control of tobacco root-knot nematodes is crucial to ensure tobacco production.

[0003] In the current prevention and control process, it is necessary to use fertilizers and pesticides in combination. When mixing fertilizers, existing equipment is mostly fixed for stirring and mixing. It is impossible to mix the fertilizers and perform circular application operations at the same time, and it is impossible to ensure that the fertilizers and pesticides can be accurately applied around the seedlings. Its function is single and its scope of application is small. Summary of the invention

[0004] The object of the present invention is to provide a mixing device for controlling root-knot nematodes and a method of using the same, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a mixing device for controlling root-knot nematodes, comprising:

[0006] The mobile mechanism includes a mobile support frame, one end of the mobile support frame is provided with a medicine box, a spraying rod is provided below the medicine box, and two ends of the bottom of the mobile support frame are respectively provided with a driving wheel and a driven wheel for driving the setting to move along the seedling direction, a connecting shaft is fixedly connected between the two driven wheels, and a driving part is provided on the outer side of the connecting shaft for driving the spraying rod to swing back and forth when the driven wheel moves;

[0007] A mixing barrel, the mixing barrel is placed in the middle of the movable support frame, the mixing barrel is rotatably connected to a stirring shaft, the bottom of the mixing barrel is fixedly connected to a feeding pipe, and the inside of the feeding pipe is provided with a spiral blade with an axis drivingly connected to the stirring shaft;

[0008] The seedling protection part is placed below the mixing barrel and includes a transparent cover that is lifted and lowered and a CDD camera for collecting and locating the seedlings.

[0009] Preferably, a driving motor is fixedly connected inside the movable support frame, and an output end of the driving motor is fixedly connected to the driving wheel.

[0010] Preferably, the driving part includes an active bevel gear 2 fixedly connected to the outside of the connecting shaft, the outer side of the active bevel gear 2 is meshingly connected with a driven bevel gear 2, the inside of the medicine box is rotatably connected with a medicine mixing rod, and the bottom of the medicine mixing rod passes through the medicine box and is fixedly connected to the driven bevel gear 2.

[0011] Preferably, a driving disk is obliquely installed on the outer side of the connecting shaft, a U-shaped frame is detachably connected to the outer side of the spray rod, the inner wall of the U-shaped frame is slidably connected to the driving disk, a water pump is fixedly connected to the outer side of the medicine box, the input end of the water pump is connected to the medicine box, and the output end of the water pump is connected to the spray rod.

[0012] Preferably, a support ring is fixedly connected to the top of the movable support frame, the mixing barrel is fixedly connected to the middle part of the support ring, a stirring motor is fixedly connected to the top of the mixing barrel, the output end of the stirring motor is fixedly connected to the stirring shaft, a transmission box is fixedly connected to the inside of the mixing barrel, an active bevel gear 1 is rotatably connected to the inside of the transmission box, a driven bevel gear 1 is meshedly connected to the outside of the active bevel gear 1, and the driven bevel gear 1 is rotatably connected to the transmission box.

[0013] Preferably, two delivery pipes are symmetrically arranged on the outside of the mixing barrel, the top of the delivery pipe is inserted from one side of the top of the mixing barrel, and the bottom of the delivery pipe is inserted from one side of the bottom of the mixing barrel. The inside of the delivery pipe is rotatably connected with a shaftless spiral blade for reciprocatingly transporting and mixing the fertilizer at the bottom of the mixing barrel upward, and the end of the shaftless spiral blade is fixedly connected with a transmission rod, and the transmission rod is fixedly connected to a driven bevel gear.

[0014] Preferably, the seedling protection part also includes a lifting slide bar slidably mounted on the outside of the feed tube, the lifting slide bar is detachably connected to the transparent cover, a permanent magnet is fixedly connected to the top of the lifting slide bar, a spring is sleeved on the outside of the lifting slide bar and below the permanent magnet, an electromagnet is fixedly connected to one side of the feed tube and above the permanent magnet, and the magnetic poles of the electromagnet are the same as those of the permanent magnet when energized.

[0015] A method for using a mixing device for controlling root-knot nematodes comprises the following steps:

[0016] During the transplanting period of tobacco seedlings, pure grain fermented De Ning organic fertilizer granules + 0.5% avermectin granules and tobacco-specific fertilizer are placed in a mixing barrel in proportion, and the inside of the mixing barrel is stirred by a stirring shaft. While stirring, the stirring shaft drives the shaftless spiral blade to rotate, so that the fertilizer at the bottom of the mixing barrel is reciprocatedly transported upward and then sprinkled on the mixing barrel for reciprocating and separate stirring;

[0017] When the fertilizer is ring-spread, the mobile support frame is placed on the ridge of tobacco. Driven by the driving motor, the mobile support frame moves forward. After the CDD camera collects the seedling information, the controller controls the electromagnet to be energized. Under the action of repulsive force, the transparent cover covers the seedling downward, and the axial spiral blade controls the fertilizer to be sprinkled along the outer wall of the transparent cover, and the fertilizer is sprinkled around the seedling.

[0018] When removing the film and adding soil, thiazolylphos and water are placed in the medicine box in proportion. When the mobile support frame moves forward, the driven wheel drives the mixing rod and the driving disk to rotate through the connecting shaft, and the driving disk drives the spraying rod to swing back and forth. After the CDD camera collects the seedling information, the thiazolylphos mitigation solution is evenly sprinkled on the gaps between the seedlings, thereby achieving root irrigation and spraying.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the device integrates the functions of movement, mixing, spraying and seedling protection, realizes multifunctional integrated operation, improves work efficiency and operation convenience; the seedlings are accurately positioned by the CDD camera, and the lifting and lowering of the moving mechanism and the transparent cover are controlled by the controller, ensuring that the fertilizer and the liquid medicine can be accurately applied around the seedlings, avoiding damage caused by direct contact with the seedlings; the spray rod is driven by the driving part to realize reciprocating swing, so that the liquid medicine can be sprayed evenly, improving the spraying effect; a stirring shaft and a shaftless spiral blade are provided in the mixing barrel, and a stirring motor is used to control the movement of the seedlings. The stirring shaft is driven to rotate, and the shaftless spiral blades are driven to rotate in the conveying pipe at the same time, realizing the up and down circulation mixing of the fertilizer, improving the mixing efficiency and uniformity; the mobile mechanism is flexibly designed to adapt to different terrains and working environments, and the forward speed and direction are controlled by the driving motor, so that the device can accurately move along the designated route; the swing of the spray rod can be fixed or released by adjusting the U-shaped frame, meeting different working requirements; the design of the seedling protection part effectively protects the seedlings from direct contact damage of fertilizers and liquid medicines, and through the lifting and lowering of the transparent cover and the control of the electromagnet, precise coverage and protection of the seedlings are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the medicine box of the present invention;

[0022] Figure 3 It is a schematic diagram of the internal structure of the delivery pipe of the present invention;

[0023] Figure 4 This is an enlarged view of point A of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the drive disk of the present invention;

[0025] Figure 6It is a schematic diagram of the position structure of the CDD camera of the present invention;

[0026] Figure 7 It is a structural schematic diagram of the U-shaped frame of the present invention;

[0027] Figure 8 It is an enlarged view of point B of the present invention.

[0028] In the figure: 1. Mobile support frame; 2. Permanent magnet; 3. Driving wheel; 4. Driven wheel; 5. Support ring; 6. Mixing barrel; 7. Stirring motor; 8. Delivery pipe; 9. Shaftless spiral blade; 10. Transmission rod; 11. Driven bevel gear 1; 12. Driving bevel gear 1; 13. Stirring shaft; 14. Feeding pipe; 15. Shafted spiral blade; 16. Transparent cover; 17. Medicine box; 18. Driving motor; 19. Connecting shaft; 20. Driving bevel gear 2; 21. Driven bevel gear 2; 22. Mixing rod; 23. Driving disk; 24. Spraying rod; 25. Water pump; 26. U-shaped frame; 27. CDD camera; 28. Lifting slide bar; 29. ​​Spring; 30. Electromagnet. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 8 The present invention provides a technical solution: a mixing device for controlling root-knot nematodes, comprising: a moving mechanism, the moving mechanism comprising a moving support frame 1, one end of the moving support frame 1 is fixedly connected to a medicine box 17, a medicine spraying rod 24 is rotatably installed below the medicine box 17, and two ends of the bottom of the moving support frame 1 are respectively provided with a driving wheel 3 and a driven wheel 4, which are used to drive the device to move along the seedling direction, a connecting shaft 19 is fixedly connected between the two driven wheels 4, and a driving part is provided on the outer side of the connecting shaft 19, which is used to drive the medicine spraying rod 24 to swing back and forth when the driven wheel 4 moves. The mixing barrel 6 is fixedly connected to the middle part of the mobile support frame 1, and the interior of the mixing barrel 6 is rotatably connected to the stirring shaft 13. The bottom of the mixing barrel 6 is fixedly connected to a feeding pipe 14. The height of the feeding pipe 14 from the ground is higher than the highest height of the tobacco after forming. The interior of the feeding pipe 14 is provided with an axial spiral blade 15 which is transmission-connected to the stirring shaft 13. The seedling protection part is placed under the mixing barrel 6. The seedling protection part includes a transparent cover 16 which is lifted and lowered and a CDD camera 27 for collecting and locating the seedlings. The CDD camera 27 is fixedly connected to the feeding pipe 14.

[0031] It should be noted that the present invention is equipped with a controller, and the CDD camera 27 is electrically connected to the controller. During transportation, the driving wheel 3 moves forward to drive the mobile support frame 1 and the driven wheel 4 to move forward. During the movement, the stirring shaft 13 stirs and mixes the materials inside the mixing barrel 6. When the CDD camera 27 detects the seedling information, the CDD camera 27 transmits the signal to the controller. After the controller moves the support frame 1 forward for a specified distance, it controls the transparent cover 16 to move downward to cover the seedlings. At this time, the transparent cover 16 is separated from the discharge pipe 14, and the stirring shaft 13 drives the axial spiral blade 15 to rotate. The axial spiral blade 15 transports the fertilizer inside the mixing barrel 6 downward, and the fertilizer rolls along the transparent cover 16 to the outside of the seedlings. Under the action of the timer, the transparent cover 16 is reset, and the mobile support frame 1 continues to move forward. When spraying liquid fertilizer or pesticide, the driven wheel 4 drives the spray rod 24 to swing back and forth through the driving disk 23, and the spray rod 24 evenly sprays the liquid inside the medicine box 17.

[0032] A driving motor 18 is fixedly connected inside the movable support frame 1 , and an output end of the driving motor 18 is fixedly connected to the driving wheel 3 .

[0033] It should be noted that the drive motor 18 of the present invention is responsible for providing drive for the entire mobile mechanism, so that the driving wheel 3 can rotate, thereby pushing the device forward in the direction of the seedlings. By controlling the speed and rotation direction of the drive motor, the forward speed of the device can be accurately adjusted to ensure that the processes of fertilizing, spraying and seedling protection are more accurate. The driving wheel 3 is directly connected to the drive motor 18, and the power output by the motor is transmitted to the entire device through the rotation of the driving wheel, so that the device can move forward along a designated route. Through the rotation of the driving wheel, the entire mobile support frame 1 and other components (such as spray rods, mixing barrels, etc.) can be driven to move forward synchronously, thereby ensuring that fertilizers, pesticides and other substances can be accurately applied to the seedlings. The fixed connection between the drive motor 18 and the driving wheel 3 ensures the direct transmission of power and avoids power loss or reduced efficiency.

[0034] Among them, the driving part includes an active bevel gear 20 fixedly connected to the outside of the connecting shaft 19, and the outer side of the active bevel gear 20 is meshedly connected with a driven bevel gear 21. The inside of the medicine box 17 is rotatably connected with a mixing rod 22, and the bottom of the mixing rod 22 passes through the medicine box 17 and is fixedly connected to the driven bevel gear 21. A driving disk 23 is obliquely installed on the outer side of the connecting shaft 19, and a U-shaped frame 26 is detachably connected to the outer side of the spraying rod 24. The inner wall of the U-shaped frame 26 is slidably connected to the driving disk 23. A water pump 25 is fixedly connected to the outer side of the medicine box 17, and the input end of the water pump 25 is connected to the medicine box 17, and the output end of the water pump 25 is connected to the spraying rod 24.

[0035] It should be noted that the driving wheel 3 of the present invention drives the mobile support frame 1 to move forward, the mobile support frame 1 drives the driven wheel 4 to rotate, the driven wheel 4 drives the connecting shaft 19 to rotate, and the connecting shaft 19 will also drive the driven bevel gear 20 to rotate. The driven bevel gear 21 drives the mixing rod 22 to rotate inside the medicine box 17, and the mixing rod 22 stirs the inside of the medicine box 17. The connecting shaft 19 rotates and drives the driving disk 23 to rotate and connect. The driving disk 23 drives the end of the spraying rod 24 to swing back and forth under the action of friction. After the end of the spraying rod 24 is installed with an atomizing nozzle, the water pump 25 draws the liquid medicine in the medicine box 17 into the spraying rod 24 for spraying, and uniform spraying is achieved by reciprocating swinging. When the spraying rod 24 does not need to swing, the U-shaped frame 26 is slid forward along the spraying rod 24 and then fixed by screws, so that the driving disk 23 is separated from the U-shaped frame 26, thereby preventing the spraying rod 24 from swinging.

[0036] Among them, the top of the mobile support frame 1 is fixedly connected with a support ring 5, the mixing barrel 6 is fixedly connected to the middle part of the support ring 5, the top of the mixing barrel 6 is fixedly connected with a stirring motor 7, the output end of the stirring motor 7 is fixedly connected to the stirring shaft 13, the interior of the mixing barrel 6 is fixedly connected with a transmission box, the interior of the transmission box is rotatably connected with an active bevel gear 12, the outer side of the active bevel gear 12 is meshedly connected with a driven bevel gear 11, the driven bevel gear 11 is rotatably connected with the transmission box, two conveying pipes 8 are symmetrically arranged on the outer side of the mixing barrel 6, the top of the conveying pipe 8 is inserted from one side of the top of the mixing barrel 6, and the bottom of the conveying pipe 8 is inserted from one side of the bottom of the mixing barrel 6, the interior of the conveying pipe 8 is rotatably connected with a shaftless spiral blade 9, which is used to reciprocately convey and mix the fertilizer at the bottom of the mixing barrel 6 upward, and the end of the shaftless spiral blade 9 is fixedly connected with a transmission rod 10, and the transmission rod 10 is fixedly connected to the driven bevel gear 11.

[0037] It should be noted that when the stirring shaft 13 of the stirring motor 7 of the present invention is stirring, the stirring shaft 13 drives the driven bevel gear 11 to rotate through the active bevel gear 12, and the driven bevel gear 11 drives the shaftless spiral blade 9 to rotate inside the conveying pipe 8 through the transmission rod 10. The shaftless spiral blade 9 draws the fertilizer inside the mixing barrel 6 from the bottom of the mixing barrel 6 and conveys it upward along the conveying pipe 8 to the upper position inside the mixing barrel 6, thereby extracting the fertilizer at the bottom of the mixing barrel 6 and throwing it downward from the top, thereby circulating and coordinating the stirring of the stirring shaft 13 to achieve uniform mixing of the fertilizer.

[0038] Among them, the seedling protection part also includes a lifting slide rod 28 slidably installed on the outside of the feed tube 14, the lifting slide rod 28 is detachably connected to the transparent cover 16, the top of the lifting slide rod 28 is fixedly connected to the permanent magnet 2, and a spring 29 is sleeved on the outside of the lifting slide rod 28 and located below the permanent magnet 2. An electromagnet 30 is fixedly connected to one side of the feed tube 14 and located above the permanent magnet 2. The magnetic poles of the electromagnet 30 are the same as the magnetic poles of the permanent magnet 2 when power is turned on.

[0039] It should be noted that the present invention selects to replace the transparent cover 16 of different diameters according to the growth of the seedlings, so that the seedlings can be shielded. When the CDD camera 27 detects the seedling information, when the controller moves to the specified position according to the seedling information indication device provided by the CDD camera, the electromagnet 30 is energized by controlling the electromagnet 30, and the electromagnet 30 is energized with the same magnetic pole as the permanent magnet 2. Under the action of repulsion, the permanent magnet 2 drives the lifting slide bar 28 to move downward and compresses the spring 29, and the driving motor 18 drives the transparent cover 16 to move downward, accurately covering the top of the seedlings to prevent fertilizers or liquid medicine from directly contacting the seedlings. After the transparent cover is separated from the feed pipe 14, the fertilizer is transported to the outside of the seedlings through the feed pipe. After fertilization is completed, the electromagnet 30 is powered off, the spring 29 drives the lifting slide bar 28 to reset, and the lifting slide bar 28 drives the transparent cover 16 to reset, and the feed pipe 14 is blocked again.

[0040] A method for using a mixing device for controlling root-knot nematodes comprises the following steps:

[0041] During the transplanting period of tobacco seedlings, pure grain fermented De Ning organic fertilizer granules + 0.5% avermectin granules and tobacco-specific fertilizer are placed in a mixing barrel 6 in proportion, and the stirring motor 7 drives the stirring shaft 13 to stir the inside of the mixing barrel 6. While stirring, the stirring shaft 13 drives the shaftless spiral blade 9 to rotate through the active bevel gear 12 and the driven bevel gear 11, so that the fertilizer at the bottom of the mixing barrel 6 is reciprocatingly transported upward and then sprinkled on the mixing barrel 6 for reciprocating and separate stirring;

[0042] When the fertilizer is ring-spread, the mobile support frame 1 is placed on the ridge of tobacco. Under the drive of the drive motor 18, the driving wheel 3 pushes the mobile support frame 1 and the driven wheel 4 to move forward. After the CDD camera 27 collects information about the tobacco seedlings, the controller controls the electromagnet 30 to be energized according to the collected information, so that the transparent cover 16 covers the seedlings downward under the action of its magnetic force. At this time, the axial spiral blade 15 controls the fertilizer to be sprinkled along the outer wall of the transparent cover 16, and the fertilizer is evenly sprinkled around the seedlings, ensuring that the fertilizer effectively covers the roots of the seedlings, which is beneficial to growth and root-knot nematode control;

[0043] When the film is removed and the soil is cultivated, thiazolylphos and water are placed in the medicine box 17 in proportion. When the mobile support frame 1 moves forward, the driven wheel 4 drives the driving disk 23 to rotate through the connecting shaft 19. The connecting shaft 19 drives the mixing rod 22 to stir the inside of the medicine box 17 through the active bevel gear 20 and the driven bevel gear 21. The driving disk 23 drives the spraying rod 24 to swing back and forth through the friction with the U-shaped frame 26. The water pump 25 draws the liquid medicine in the medicine box 17 into the spraying rod 24. After the CDD camera 27 collects the seedling information, the thiazolylphos mitigation solution is evenly sprinkled on the gap between the seedlings, thereby realizing root irrigation and spraying.

[0044] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0046] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mixing device for controlling root-knot nematodes, characterized in that: include: The mobile mechanism comprises a mobile support frame (1), a medicine box (17) is provided at one end of the mobile support frame (1), a spray rod (24) is provided below the medicine box (17), a driving wheel (3) and a driven wheel (4) are respectively provided at the two ends of the bottom of the mobile support frame (1), and are used to drive the setting to move along the seedling direction, a connecting shaft (19) is fixedly connected between the two driven wheels (4), and a driving part is provided on the outer side of the connecting shaft (19), which is used to drive the spray rod (24) to swing back and forth when the driven wheel (4) moves; A mixing barrel (6), the mixing barrel (6) is placed in the middle of the movable support frame (1), the mixing barrel (6) is rotatably connected to a stirring shaft (13), the bottom of the mixing barrel (6) is fixedly connected to a feeding pipe (14), and the inside of the feeding pipe (14) is provided with a shaft spiral blade (15) which is transmission-connected to the stirring shaft (13); A seedling protection part is placed below the mixing barrel (6), and comprises a transparent cover (16) that is lifted and lowered and a CDD camera (27) for collecting and locating the seedlings.

2. A mixing device for controlling root-knot nematodes according to claim 1, characterized in that: A driving motor (18) is fixedly connected inside the movable support frame (1), and an output end of the driving motor (18) is fixedly connected to the driving wheel (3).

3. A mixing device for controlling root-knot nematodes according to claim 2, characterized in that: The driving part comprises a second active bevel gear (20) fixedly connected to the outside of the connecting shaft (19); the outside of the second active bevel gear (20) is meshingly connected to a second driven bevel gear (21); the inside of the medicine box (17) is rotatably connected to a medicine mixing rod (22); the bottom of the medicine mixing rod (22) penetrates the medicine box (17) and is fixedly connected to the second driven bevel gear (21).

4. A mixing device for controlling root-knot nematodes according to claim 3, characterized in that: A driving disk (23) is obliquely mounted on the outer side of the connecting shaft (19); a U-shaped frame (26) is detachably connected to the outer side of the spraying rod (24); an inner wall of the U-shaped frame (26) is slidably connected to the driving disk (23); a water pump (25) is fixedly connected to the outer side of the medicine box (17); an input end of the water pump (25) is connected to the medicine box (17); and an output end of the water pump (25) is connected to the spraying rod (24).

5. A mixing device for controlling root-knot nematodes according to claim 4, characterized in that: A support ring (5) is fixedly connected to the top of the mobile support frame (1), the mixing barrel (6) is fixedly connected to the middle of the support ring (5), a stirring motor (7) is fixedly connected to the top of the mixing barrel (6), the output end of the stirring motor (7) is fixedly connected to the stirring shaft (13), a transmission box is fixedly connected to the inside of the mixing barrel (6), a driving bevel gear 1 (12) is rotatably connected to the inside of the transmission box, the outer side of the driving bevel gear 1 (12) is meshedly connected to a driven bevel gear 1 (11), and the driven bevel gear 1 (11) is rotatably connected to the transmission box.

6. A mixing device for controlling root-knot nematodes according to claim 5, characterized in that: Two conveying pipes (8) are symmetrically arranged on the outer side of the mixing barrel (6), the top of the conveying pipe (8) is inserted from one side of the top of the mixing barrel (6), and the bottom of the conveying pipe (8) is inserted from one side of the bottom of the mixing barrel (6). The inside of the conveying pipe (8) is rotatably connected with a shaftless spiral blade (9) for reciprocatingly conveying and mixing fertilizer at the bottom of the mixing barrel (6). The end of the shaftless spiral blade (9) is fixedly connected with a transmission rod (10), and the transmission rod (10) is fixedly connected to a driven bevel gear (11).

7. A mixing device for controlling root-knot nematodes according to claim 6, characterized in that: The seedling protection part also includes a lifting slide bar (28) slidably mounted on the outside of the feed tube (14); the lifting slide bar (28) is detachably connected to the transparent cover (16); a permanent magnet (2) is fixedly connected to the top of the lifting slide bar (28); a spring (29) is sleeved on the outside of the lifting slide bar (28) and located below the permanent magnet (2); an electromagnet (30) is fixedly connected to one side of the feed tube (14) and located above the permanent magnet (2); and the magnetic poles of the electromagnet (30) are the same as those of the permanent magnet (2) when power is supplied.

8. The method for using the mixing device for controlling root-knot nematodes according to claim 7, characterized in that: The following steps are involved: During the transplanting period of tobacco seedlings, pure grain fermented De Ning organic fertilizer granules + 0.5% avermectin granules and tobacco-specific fertilizer are placed in a mixing barrel (6) in proportion, and the inside of the mixing barrel (6) is stirred by a stirring shaft (13). During the stirring, the stirring shaft (13) drives the shaftless spiral blade (9) to rotate, so that the fertilizer at the bottom of the mixing barrel (6) is reciprocally transported upward and then sprinkled on the mixing barrel (6) for reciprocating and separate stirring; When the fertilizer is ring-spread, the mobile support frame (1) is placed on the ridge of tobacco, and driven by the driving motor (18), the mobile support frame (1) moves forward, and after the CDD camera (27) collects the seedling information, the controller controls the electromagnet (30) to be energized, and under the action of repulsive force, the transparent cover (16) covers the seedling downward, and the axial spiral blades (15) control the fertilizer to be sprinkled along the outer wall of the transparent cover (16), so that the fertilizer is sprinkled around the seedling; When the film is removed and the soil is cultivated, thiazolylphos and water are placed in a medicine box (17) in proportion. When the mobile support frame (1) moves forward, the driven wheel (4) drives the medicine mixing rod (22) and the driving disk (23) to rotate through the connecting shaft (19), and the driving disk (23) drives the medicine spraying rod (24) to swing back and forth. After the CDD camera (27) collects the seedling information, the thiazolylphos mitigation liquid is evenly sprinkled on the gaps between the seedlings, thereby achieving root irrigation and spraying.

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