Tobacco seedling removing and soil cultivating device under tobacco planting film

Abstract

This invention belongs to the field of tobacco field planting technology, and particularly relates to a device for removing and mounding tobacco seedlings under mulch film. It includes a movable platform spanning the tobacco ridges and an outer cylinder corresponding to the tobacco seedlings on the ridges and fixed to the bottom of the platform. A frustum-shaped guide platform is fixed and coaxially connected to the inner wall of the outer cylinder via a flange at its bottom end. The flange has soil inlets spaced evenly around its circumference. Two soil-collecting pipes, inclined at their bottom ends towards the direction of operation, are fixed to both sides of the platform. The bottom end of each soil-collecting pipe is connected to a bucket, and its top is connected to and communicates with the outer cylinder. The device also includes a film-cutting device, which includes an electric actuator mounted on the platform. The output end of the electric actuator passes through the guide platform and is rotatably connected to an inner cylinder coaxially positioned opposite the outer cylinder. The bottom end of the inner cylinder is equipped with a ring-cutting blade. This invention has a simple structure and utilizes the transmission and coordination of multiple mechanisms to achieve film breaking and mounding operations during the movement of the entire machine, significantly improving work efficiency and saving labor.

Description

Technical Field

[0001] This invention belongs to the field of tobacco field planting technology, and in particular relates to a device for removing seedlings and mounding soil under mulch film in tobacco planting. Background Technology

[0002] The process of removing seedlings and mounding soil around them occurs when the tobacco seedlings have grown from transplanting to the early stage of the rosette stage. At this point, the closed mulch film restricts the upward growth of the seedlings, necessitating the cutting of the film to expose the seedlings. The film also provides insulation for the seedlings at night. Simultaneously, soil is mounded around the seedlings to promote root development. Currently, this process is primarily manual, which is inefficient and labor-intensive. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a tobacco planting seedling removal and soil-cultivation device under plastic film. The present invention has a simple structure and utilizes the transmission and coordination of multiple mechanisms to achieve the film breaking and soil cultivation operations during the movement of the whole machine, which greatly improves the work efficiency and saves labor.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A tobacco planting seedling removal and soil-cultivation device under mulch film includes a movable platform spanning the tobacco ridges, and an outer cylinder corresponding to the tobacco seedlings on the ridges and fixed to the bottom surface of the platform. A frustum-shaped guide platform is fixed and coaxially connected to the inner wall of the outer cylinder via a flange at its bottom end. The flange has soil-lowering openings at equal intervals around its circumference. Two soil-boring pipes, with their bottom ends inclined toward the direction of operation, are fixed on both sides of the platform. The bottom ends of the soil-boring pipes are connected to buckets, and the tops are connected to and communicate with the outer cylinder. The equipment also includes a film cutting device, which includes an electric push rod mounted on a platform. The output end of the electric push rod passes through the guide table and is rotatably connected to an inner cylinder that is coaxially arranged with the outer cylinder. The bottom end of the inner cylinder is provided with a ring cutting blade.

[0005] Preferably, the film cutting device further includes a middle cylinder coaxially fixed to the bottom surface of the guide platform, the inner wall of the middle cylinder is provided with a spiral groove and the top of the outer wall of the inner cylinder is provided with a slider that slides with the spiral groove.

[0006] Preferably, the outer wall of the middle cylinder below the flange and the inner wall of the outer cylinder form a soil lowering channel; the inner wall of the outer cylinder above the flange and the outer wall of the guide platform form a soil inlet channel.

[0007] Preferably, the soil sampling pipe is equipped with an auger inside and the auger is connected to the output end of the motor on the platform, and the top of the soil sampling pipe is connected to the soil inlet channel through a pipe. During the movement of the platform, the bottom of the bucket cuts into the ground of the furrow next to the tobacco ridge.

[0008] Preferably, the output end of the electric actuator is fixedly connected to the top surface of the positioning plate, the top of the inner cylinder is rotatably engaged with the annular groove opened on the bottom surface of the positioning plate through an annular convex ring, and a positioning post is coaxially fixed on the bottom surface of the positioning plate relative to the inner cylinder; An airtight rubber plug is provided between the inner cylinder and the positioning column. The top surface of the rubber plug is fixedly connected to the bottom end of the limiting rod that penetrates the positioning plate, and the top end of the limiting rod is fixedly connected to the guide platform.

[0009] Preferably, the outer wall of the guide platform is provided with a receiving groove radially connected to the soil opening of the corresponding flange. The sealing plate for covering the soil opening is radially slidably disposed in the space formed by the receiving groove and the soil opening. The end of the sealing plate facing the receiving groove is provided with a spring and a pull rope respectively. The spring is connected to the inner wall of the receiving groove, and the pull rope passes around the guide rod erected in the receiving groove and is connected to the top surface of the positioning plate.

[0010] Preferably, the top surface of the flange is provided with a wedge between adjacent soil inlets, and the wedge surfaces on both sides of the wedge smoothly transition to the corresponding soil inlets. The wedge serves two purposes: firstly, to guide the soil to quickly enter the soil inlets, and secondly, to ensure that the soil in the soil inlet space can be completely discharged through the soil inlets without any dead corners remaining.

[0011] Preferably, the inner cylinder has an integral air-sealing ring on its inner wall below the rubber stopper, the inner ring surface of the air-sealing ring is located below the positioning post and the inner diameter of the air-sealing ring is smaller than the outer diameter of the positioning post. The area below the rubber stopper consists of an inner cylinder wall, a positioning column outer wall, and an air-sealed ring, forming a suction space that communicates with the outside world only through the ring hole of the air-sealed ring.

[0012] Preferably, the annular hole of the air-sealed ring is airtightly connected to the exhaust port at the top of the suction cup, and the suction cup is in the shape of a hollow frustum with the air inlet at the bottom located above the blade edge at the bottom of the inner cylinder.

[0013] Preferably, the air inlet of the suction cup is covered with a filter screen. The filter screen is designed to prevent cut-off mulch film from entering the suction cup and causing blockage.

[0014] The working process of this invention is as follows: First, position the platform across the tobacco ridge where you are currently working, so that the platform's two wheels are positioned on either side of the ridge, and simultaneously cut the bucket into the furrow to allow soil to enter the bucket. Then, move the platform and stop at each tobacco seedling to work.

[0015] During platform movement, soil is scooped up by the bucket and pushed into the soil intake pipe by subsequent soil pushing action. It is then fed into the soil intake channel by a motor-driven auger. The soil in the soil intake channel falls along the guide platform and accumulates above the flange. At this moment, the soil inlet of the flange is sealed by the sealing plate.

[0016] When the platform moves above the tobacco seedlings, it stops moving. The staff then activates the electric actuator. The output end of the electric actuator extends first and pushes the positioning plate vertically downward. Since the outer cylinder is fixedly connected to the platform, the outer cylinder, guide platform, middle cylinder, and limit rod cannot move. Therefore, the positioning plate only drives the positioning column and inner cylinder to move vertically.

[0017] During the vertical movement of the inner cylinder, due to the sliding contact between the slider on its outer wall and the spiral groove on the inner wall of the middle cylinder, the inner cylinder moves vertically downward and rotates circumferentially. When the output end of the electric actuator reaches the end of its stroke, the blade at the bottom of the inner cylinder contacts the mulch film and cuts it. Meanwhile, as the positioning plate moves downward, the limiting rod and the rubber stopper cannot move. Therefore, the suction space below the rubber stopper, composed of the inner wall of the inner cylinder, the outer wall of the positioning column, and the air closed loop, will increase in volume and generate negative pressure. This will cause the bottom of the suction cup to generate suction force, and use this suction force to pull the circular mulch film cut by the blade upward and separate it from the mulch film substrate.

[0018] Similarly, the downward movement of the positioning plate will also cause the pull rope to move downward, which in turn allows the pull rope to overcome the deformation force of the spring and pull the sealing plate into the storage groove of the guide platform and expose the soil outlet. The soil above the soil outlet falls into the soil channel from the soil outlet. When this part of the soil comes into contact with the mulch film substrate, it first piles up on the outside of the inner cylinder, and after the inner cylinder is subsequently reset, it loses its obstruction and falls around the tobacco seedlings to complete the soil covering operation.

[0019] Then, the output end of the electric actuator drives the positioning plate to reset, the inner cylinder to reset, the suction cup pushes away the adsorbed circular mulch film, and at the same time, the pull rope and spring reset, and the sealing plate continues to seal the soil inlet under the action of the spring. The soil in the soil inlet channel no longer falls and waits for the next backfilling operation.

[0020] Compared with the prior art, the present invention has the following advantages: The present invention has a simple structure and utilizes the transmission and cooperation of multiple mechanisms to realize the film breaking and soil covering operations during the movement of the whole machine, which greatly improves the work efficiency and saves labor. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the seedling removal and soil cultivation device under the film as described in a specific embodiment; Figure 2 This is a schematic diagram of the internal structure of the outer cylinder as described in the specific embodiment; Figure 3 This is a schematic diagram of the internal structure of the middle cylinder described in a specific embodiment; Figure 4 This is a schematic diagram of the internal structure of the soil sampling pipe described in a specific embodiment; Figure 5 This is a schematic diagram of the structure of the middle cylinder described in a specific embodiment; Figure 6This is a schematic diagram of the internal structure of the guide platform described in a specific embodiment; Figure 7 for Figure 6 Enlarged schematic diagram of the structure of section A in the middle; Figure 8 This is a schematic diagram of the internal structure of the inner cylinder as described in the specific embodiment; Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0023] like Figure 1-8 As shown, the tobacco planting film seedling removal and soil cultivation device includes a movable platform 1 spanning the tobacco ridge, a pusher 12 on one side of the platform 1, and an outer cylinder 24 corresponding to the tobacco seedlings on the ridge and fixed to the bottom surface of the platform. A frustum-shaped guide 25 is fixed to the inner wall of the outer cylinder 24 and coaxially connected through a flange 26 at the bottom end. The flange 26 has soil inlets 27 evenly spaced around the circumference. A wedge 28 is provided on the top surface of the flange 26 between adjacent soil inlets 27. The wedge surfaces on both sides of the wedge 28 smoothly transition to the corresponding soil inlets 27.

[0024] A middle cylinder 29 is coaxially fixed on the bottom surface of the guide platform 25, and a spiral groove 29 is provided on the inner wall of the middle cylinder 29; the outer wall of the middle cylinder 29 below the flange 26 and the inner wall of the outer cylinder 24 form a soil lowering channel 242; the inner wall of the outer cylinder 24 above the flange 26 and the outer wall of the guide platform 25 form a soil inlet channel 241.

[0025] Two soil-collecting pipes 2, with their bottom ends inclined toward the direction of operation, are fixed on both sides of the platform 1. The soil-collecting pipe 2 is equipped with an auger 221, which is connected to the output end of the motor 22 on the platform. The top end of the soil-collecting pipe 2 is connected to the soil inlet channel 241 through a pipe 23. The bottom end of the soil-collecting pipe 2 is connected to a bucket 21. During the movement of the platform 1, the bottom end of the bucket 21 cuts into the ground of the furrow next to the tobacco ridge. The equipment also includes a film cutting device, which includes an electric push rod 13 mounted on the platform 1. The output end of the electric push rod 13 passes through the guide plate 5 and is fixedly connected to the top surface of the positioning plate 3, which is coaxially mounted with respect to the outer cylinder 24. The bottom surface of the positioning plate 3 is provided with an annular groove 38. Below the positioning plate 3 is an inner cylinder 31 coaxially arranged with respect to the middle cylinder 29, and a positioning post 39 is fixedly fixed on the bottom surface of the positioning plate 3 coaxially with respect to the inner cylinder 31. The top of the inner cylinder 31 is rotatably engaged with the annular groove 38 through an annular protrusion 313. The top of the outer wall of the inner cylinder 31 is provided with a slider 36 that slides with the spiral groove 291 on the inner wall of the middle cylinder 29. The bottom of the inner cylinder 31 is provided with an annular cutting blade 32.

[0026] A rubber plug 314 is provided between the inner cylinder 31 and the positioning post 39 in an airtight manner. The top surface of the rubber plug 314 is fixedly connected to the bottom end of the limiting rod 37 that penetrates the positioning plate 3. The limiting rod 37 is located inside the annular convex ring 313 and the top end of the limiting rod 37 is fixedly connected to the bottom surface of the guide table 25.

[0027] The inner cylinder 31 has an integrally formed air-sealing ring 33 on its inner wall below the rubber stopper 314. The inner ring surface of the air-sealing ring 33 is located below the positioning post 39, and the inner diameter of the air-sealing ring 33 is smaller than the outer diameter of the positioning post 39. The suction space 312 below the rubber stopper 314, composed of the inner wall of the inner cylinder 31, the outer wall of the positioning post 39, and the air-sealing ring 33, is connected to the outside only through the annular hole of the air-sealing ring 33. The annular hole of the air-sealing ring 33 is airtightly connected to the exhaust port at the top of the suction cup 34. The suction cup 34 is in the shape of a hollow frustum, and the air inlet at the bottom is located above the blade 32 at the bottom of the inner cylinder. The air inlet of the suction cup 34 is covered with a filter screen 35.

[0028] The outer wall of the guide platform 25 is radially connected to the soil inlet 27 of the corresponding flange 26 and has a receiving groove 251. The sealing plate 254 for covering the soil inlet 27 is radially slidably disposed in the space formed by the receiving groove 251 and the soil inlet 27. The sealing plate 254 is provided with a spring 255 and a pull rope 253 at one end facing the receiving groove 251. The spring 255 is connected to the inner wall of the receiving groove 251, and the pull rope 253 passes around the guide rod 252 erected in the receiving groove and is connected to the top surface of the positioning plate 3.

[0029] The working process of this invention is as follows: First, platform 1 is positioned across the tobacco ridge where work is currently being carried out, so that the two moving wheels 11 of the platform are placed on either side of the tobacco ridge, while the bucket 21 cuts into the ground of the ridge, allowing soil to enter the bucket 21. Then, platform 1 is moved and stopped at each tobacco seedling for work.

[0030] During the movement of platform 1, the soil is scooped up by bucket 21 and enters soil intake pipe 2 under the subsequent soil pushing action. Then, it is sent into soil intake channel 241 by auger 221 driven by motor 22. The soil in soil intake channel 241 falls along guide platform 25 and accumulates above flange 26. At this time, the soil inlet 27 of flange 26 is closed by sealing plate 254.

[0031] When platform 1 moves above the tobacco seedlings, it stops moving. The staff turns on electric actuator 13. The output end of electric actuator 13 extends first and pushes positioning plate 3 to move vertically downward. Since outer cylinder 24 is fixedly connected to platform 1, outer cylinder 24, guide platform 25, middle cylinder 29 and limit rod 37 cannot move. Therefore, positioning plate 3 only drives positioning column 39 and inner cylinder 31 to move vertically.

[0032] During the vertical movement of the inner cylinder 31, due to the sliding engagement between the slider 36 on its outer wall and the spiral groove 291 on the inner wall of the middle cylinder 29, the inner cylinder 31 moves vertically downward and rotates circumferentially. When the output end of the electric actuator 13 reaches the end of its stroke, the blade at the bottom of the inner cylinder 31 contacts the ground film and cuts it. Meanwhile, as the positioning plate 3 moves downward, the limiting rod 37 and the rubber plug 314 cannot move. Therefore, the suction space 312 below the rubber plug 314, which is composed of the inner wall of the inner cylinder 31, the outer wall of the positioning column 39, and the air closed ring 33, will increase in volume and generate negative pressure. This will cause the suction cup 34 to generate suction at the bottom, and use this suction to pull the circular mulch film cut by the blade upward to separate it from the mulch film substrate.

[0033] Similarly, the downward movement of the positioning plate 3 will also cause the pull rope 253 to move downward, thereby allowing the pull rope 253 to overcome the deformation elasticity of the spring 255 and pull the sealing plate 254 into the storage groove 251 of the guide platform and expose the soil outlet 27. The soil above the soil outlet 27 falls from the soil outlet into the soil channel 242. When this part of the soil comes into contact with the mulch film substrate, it first piles up on the outside of the inner cylinder 31, and after the inner cylinder 31 is subsequently reset, it loses its obstruction and falls around the tobacco seedlings to complete the soil covering operation.

[0034] Then, the output end of the electric actuator 13 drives the positioning plate 3 to reset, the inner cylinder 31 to reset, the suction cup 34 pushes away the adsorbed circular mulch film, and at the same time, the pull rope 253 and the spring 255 both reset, and the sealing plate 254 continues to seal the lower soil opening 27 under the action of the spring 255. The soil in the soil inlet channel 241 no longer falls and waits for the next backfilling operation.

Claims

1. A tobacco planting seedling removal and soil-building device under plastic film, comprising a movable platform spanning the tobacco ridge, characterized in that, It also includes an outer cylinder that is set and fixed to the bottom of the platform corresponding to the tobacco seedlings on the ridge. The frustum-shaped guide platform is fixed to the inner wall of the outer cylinder and coaxially connected through the flange at the bottom end. The flange has soil inlets at equal intervals around the circumference. Two soil-boring pipes, with their bottom ends inclined toward the direction of operation, are fixed on both sides of the platform. The bottom ends of the soil-boring pipes are connected to buckets, and the tops are connected to and communicate with the outer cylinder. The equipment also includes a film cutting device, which includes an electric push rod mounted on a platform. The output end of the electric push rod passes through the guide table and is rotatably connected to an inner cylinder that is coaxially arranged with respect to the outer cylinder. The bottom end of the inner cylinder is provided with a ring cutting blade. The film cutting device also includes a middle cylinder coaxially fixed to the bottom surface of the guide platform. The inner wall of the middle cylinder is provided with a spiral groove and the top of the outer wall of the inner cylinder is provided with a slider that slides with the spiral groove. The output end of the electric actuator is fixedly connected to the top surface of the positioning plate. The top of the inner cylinder is rotatably engaged with the annular groove on the bottom surface of the positioning plate through an annular convex ring. The bottom surface of the positioning plate is coaxially fixed with a positioning column relative to the inner cylinder. An airtight rubber plug is provided between the inner cylinder and the positioning column. The top surface of the rubber plug is fixedly connected to the bottom end of the limiting rod that penetrates the positioning plate, and the top end of the limiting rod is fixedly connected to the guide platform. The outer wall of the guide platform is radially connected to the soil inlet of the corresponding flange and is provided with a receiving groove. The sealing plate for covering the soil inlet is radially slidably set in the space formed by the receiving groove and the soil inlet. The end of the sealing plate facing the receiving groove is provided with a spring and a pull rope respectively. The spring is connected to the inner wall of the receiving groove, and the pull rope passes around the guide rod erected in the receiving groove and is connected to the top surface of the positioning plate.

2. The tobacco planting film-covered seedling removal and soil-building device as described in claim 1, characterized in that, The outer wall of the middle cylinder below the flange and the inner wall of the outer cylinder form a soil lowering channel; the inner wall of the outer cylinder above the flange and the outer wall of the guide platform form a soil inlet channel.

3. The tobacco planting film-covered seedling removal and soil-building device as described in claim 2, characterized in that, The soil sampling pipe is equipped with an auger inside, and the auger is connected to the output end of the motor on the platform. The top of the soil sampling pipe is connected to the soil inlet channel through a pipe. During the movement of the platform, the bottom of the bucket cuts into the ground of the furrow next to the tobacco ridge.

4. The tobacco planting film-covered seedling removal and soil-building device as described in claim 1, characterized in that, The top surface of the flange is provided with a wedge between adjacent soil openings, and the wedge surfaces on both sides of the wedge smoothly transition to the corresponding soil openings.

5. The tobacco planting film-covered seedling removal and soil-building device as described in claim 1, characterized in that, The inner cylinder has an integral air-sealing ring on its inner wall below the rubber stopper. The inner ring surface of the air-sealing ring is located below the positioning post, and the inner diameter of the air-sealing ring is smaller than the outer diameter of the positioning post. The area below the rubber stopper consists of an inner cylinder wall, a positioning column outer wall, and an air-sealed ring, forming a suction space that communicates with the outside world only through the ring hole of the air-sealed ring.

6. The tobacco planting film-covered seedling removal and soil-building device as described in claim 5, characterized in that, The annular hole of the air-sealed ring is airtightly connected to the exhaust port at the top of the suction cup. The suction cup is in the shape of a hollow frustum, and the air inlet at the bottom is located above the blade edge at the bottom of the inner cylinder.

7. The tobacco planting film-covered seedling removal and soil-building device as described in claim 6, characterized in that, The air inlet of the suction cup is covered with a filter screen.

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