A soil turning and screening machine for soil improvement and its usage method

Abstract

This invention discloses a soil turning and screening machine for soil improvement, comprising a frame, characterized in that: a soil stratification and stirring component is provided in the middle of the frame, a soil digging and transporting component is provided at the front end of the frame, and a walking component is connected to the rear end of the frame; the soil stratification and stirring component includes a support plate, with symmetrical arc-shaped slide rails on both sides of the support plate, each arc-shaped slide rail having a limit post, and each limit post having a swing plate fixedly connected to its upper end; the swing plate is L-shaped, with the long rod end of the swing plate hinged to the support plate, and a soil turning trough fixedly connected to the upper middle of the support plate. This invention relates to the field of agricultural machinery technology, specifically to a soil turning and screening machine for soil improvement and its usage method, realizing the stratification and turning of soil as well as the digging and transport of soil.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery and equipment technology, and more specifically, to a soil-improving soil turning and screening machine and its usage method. Background Technology

[0002] Traditional soil improvement methods typically rely on manual labor or simple mechanical equipment for turning and screening. These methods are inefficient, labor-intensive, and struggle to achieve uniform soil mixing and stratification. With the development of agricultural modernization, the demand for soil improvement equipment is increasing, leading to the emergence of soil improvement screening machines. For example, CN115069751B describes a heavy metal contaminated soil remediation device, belonging to the field of environmental protection equipment technology. This device includes a casing, motor, turning mechanism, screening mechanism, feeding mechanism, neutralization mechanism, and leveling mechanism. The turning mechanism includes a shovel mounted on a cam assembly. The screening mechanism includes two sieves mounted on a swing assembly. The feeding mechanism includes two symmetrically arranged hoppers fixedly mounted on a drive shaft, which is mounted on a tilting assembly connected to a rack on the sieve. The neutralization mechanism includes several discharge pipes slidably mounted on an L-shaped plate, connected to a pushing assembly, which in turn connects to the swing assembly. This invention remediates and treats soil contaminated with heavy metals through a soil turning mechanism, a screening mechanism, a dispensing mechanism, and a neutralization mechanism.

[0003] Announcement No. CN112474356B describes a soil remediation screening system and method that can automatically adjust the spacing of the screening mesh according to the required soil particle size. It includes a soil turning and weeding component, a weed collection component, a shaking support component, a shaking transition component, a screening frame component, a screening adjustment component, and a shaking drive component. The method is as follows: Step 1: Soil is poured into a soil adding basket, and a rotating shaft drives multiple weed-picking forks to rotate, picking out weeds, branches, and other impurities from the soil; Step 2: The soil slides down the transition slide plate at the left end and is screened as it passes through multiple screening bars, separating soil particles that meet the size requirements; Step 3: Small particles fall through the barrier frame into one of the sorting baskets; Step 4: Large particles slide down the transition slide plate at the right end into another sorting basket.

[0004] Many existing screening devices include screening mechanisms, but they cannot achieve simultaneous agitation of multiple layers to achieve better screening and separation. Therefore, a mechanical device that can efficiently and uniformly turn over and screen the soil is needed. Summary of the Invention

[0005] This invention provides a soil turning and screening machine for soil improvement and its usage method, which realizes the layering and turning of soil as well as the shoveling and transportation of soil.

[0006] A soil turning and screening machine for soil improvement includes a frame, characterized in that: a soil layering and stirring component is provided in the middle of the frame, a soil digging and transporting component is provided at the front end of the frame, and a walking component is connected to the rear end of the frame.

[0007] The soil stratification and stirring assembly includes a support plate, on both sides of which are symmetrical arc-shaped slide rails. Each arc-shaped slide rail is provided with a limit post, and the upper end of each limit post is fixedly connected to a swing plate. The swing plate is L-shaped, and the long rod end of the swing plate is hinged to the support plate. A soil turning trough is fixedly connected to the upper middle part of the support plate. Each swing plate is fixedly connected to one end of the soil turning trough with several evenly arranged turning rods. The arc-shaped wall of the soil turning trough is provided with several slide rails, all of which are arranged sequentially from top to bottom. Each slide rail is matched with a corresponding extension arm.

[0008] The support plate has symmetrically arranged openings corresponding to the position of the soil turning trough, and the bottom of the soil turning trough has a set of evenly arranged circumferentially arranged soil leakage grooves.

[0009] The lower parts of the two limiting posts on the same side are respectively set at both ends of the linear slide rail. The lower middle part of the linear slide rail is fixedly connected to the moving blocks. The two moving blocks are respectively threaded to both ends of the screw. The threads at both ends of the screw are reversed. The middle bearing of the screw is connected to the fixing block. The fixing block is fixed to the lower middle part of the support plate. The two ends of the linear slide rail are passed through by guide shafts. The two ends of the guide shafts are respectively fixedly connected to support rods. The upper ends of each support rod are respectively fixed to the support plate by connecting posts.

[0010] As a further limitation of this technical solution, a motor is fixed at the middle position of one side of the support plate, and the motor is fixed to one end of the screw.

[0011] As a further limitation of this technical solution, the walking assembly includes symmetrically arranged walking wheels, which are respectively disposed on both sides of the rear end of the frame. The walking wheels are respectively connected to both ends of a rotating shaft via a ratchet assembly. The rotating shaft is respectively bearing connected to the two sides of the frame. The rotating shaft passes through a fixed seat, which is fixed to the upper rear side of the frame. A sprocket is fixedly connected to the middle of the rotating shaft. The sprocket is connected to another sprocket via a chain. The other sprocket is fixed to the center of another rotating shaft. Vertical rods are respectively bearing connected to both ends of the other rotating shaft. The upper ends of the two vertical rods are fixed to the upper front end of the frame. The rear ends of symmetrically arranged shovels are respectively fixedly connected to the middle of the other rotating shaft. The two shovels are respectively disposed on both sides of the sprocket. A second motor is fixed to the vertical rod. The output shaft of the second motor is fixedly connected to one end of the corresponding rotating shaft.

[0012] As a further limitation of this technical solution, the ratchet assembly includes a ratchet ring, which is fixed to the center of the traveling wheel. A set of circumferentially evenly arranged and continuous ratchet grooves are provided on the inner and outer ends of the ratchet ring. The ratchet grooves match the ratchet teeth. Each ratchet groove is formed by a long side and a short side, creating a slot for the matching ratchet teeth. When the ratchet teeth rotate along the circumferential area enclosed by the long side of the ratchet groove, the ratchet ring will not rotate. When the ratchet teeth rotate along the circumferential area enclosed by the short side of the ratchet groove, the ratchet teeth are held in place by the short side of the ratchet groove and will not disengage from the slot. The ratchet ring can rotate with the ratchet teeth. The ratchet teeth are rotatably connected to a fixed wheel, which is rotatably connected to the ratchet ring. The fixed wheel is a fixed ring, which is fixedly connected to the end of the corresponding rotating shaft. The ratchet teeth are fixedly connected to the outer wall surface of the ring via a torsion spring.

[0013] As a further limitation of this technical solution, the rear end of the frame is fixedly connected to a handle, and the lower front ends of the frame are respectively provided with auxiliary wheels.

[0014] As a further limitation of this technical solution, a partition is fixed to the inner rear end of the shovel, and a symmetrical guide groove is fixed to the upper side of the soil turning trough near one end of the shovel, with the other end of the guide groove located above the rear end of the shovel.

[0015] This invention also provides a method for using a soil turning and screening machine for soil improvement, characterized by the following steps:

[0016] Step 1: When using the machine, move it to the area where the soil needs to be improved, and adjust the position of the equipment using the auxiliary wheels to ensure stability.

[0017] Step 2: Start the motor. By controlling the rotation direction and speed of the motor, the soil stratification mixing component is started and adjusted to stratify and mix the soil.

[0018] Step 3: As needed, start motor 2 and control the rotation direction of the shaft to realize the digging and transporting functions of the shovel. The soil is sent into the turning trough through the guide groove. By controlling the rotation of motor 2, the equipment can move forward and stop. When it is necessary to stop the equipment from moving, the ratchet and ratchet assembly is used to ensure the stability of the equipment.

[0019] Step 4: After completing the soil improvement in a certain area, check the uniformity of the soil and the improvement effect, and make adjustments or repeat the operation if necessary.

[0020] As a further limitation of this technical solution, in step two, the output shaft of the motor of the soil stratification and stirring component rotates to drive the screw to rotate, the screw drives the moving block to move, the moving block drives the linear slide rail to move, the linear slide rail drives the limiting column to move within the corresponding arc-shaped slide rail, the limiting column drives the swing plate to swing, the swing plate drives the extension arm to reciprocate, and the extension arm drives the turning rod to circulate, thereby stirring the soil at different depths.

[0021] As a further limitation of this technical solution, in step three, when the drive shaft of the second motor rotates, the ratchet is engaged with the ratchet groove under the action of the torsion spring, and the ratchet rotates along the circumferential area enclosed by the short side of the ratchet groove. The ratchet is stuck in a ratchet groove and rotates, and the ratchet ring rotates accordingly, thereby driving the walking wheel to rotate and realizing the forward movement of the equipment.

[0022] When the second drive shaft of the motor rotates in the opposite direction, the ratchet moves in a circular motion along the circumferential area enclosed by the long side of the ratchet groove. The ratchet cannot be inserted into the ratchet groove to drive the ratchet ring to rotate. Therefore, the ratchet ring and the traveling wheel will not rotate, and the equipment will not move.

[0023] Compared with the prior art, the advantages and positive effects of the present invention are:

[0024] The soil stratification and agitation component is driven by a motor to rotate a screw, which in turn drives a moving block to move along a linear slide rail. The movement of the moving block causes a limiting column to move within an arc-shaped slide rail, which in turn drives an L-shaped swing plate to swing. The swing of the swing plate causes a turning rod fixed on it to perform a cyclical motion, thereby achieving stratification and agitation of the soil. Multiple extension arms are arranged in a circular pattern from top to bottom with uniform spacing, enabling simultaneous agitation of multiple layers for better screening and separation.

[0025] The ratchet ring is fixed to the center of the wheel. Its inner and outer ends are provided with a set of evenly arranged and continuous ratchet grooves. The ratchet teeth match the ratchet grooves and can be inserted into the ratchet grooves. The ratchet teeth are designed to be able to rotate in one direction, that is, they can rotate freely in one direction and are locked by the ratchet grooves in the other direction. The ratchet teeth are fixedly connected to the outer wall of the ring by a torsion spring. The torsion spring provides the necessary elastic force for the ratchet teeth to make them closely contact the ratchet grooves. The fixed wheel is fixedly connected to the ratchet ring to maintain the stability of the ratchet ring. The ring is fixedly connected to the fixed wheel and transmits force to the shaft through the connection between the ratchet teeth and the torsion spring. The shaft passes through the fixed seat and is connected to the frame. It is the connection point between the ratchet ratchet assembly and the wheel.

[0026] When the motor 230 drives the rotating shaft 121 to rotate, the ratchet 91 is engaged with the ratchet groove 95 under the action of the torsion spring 92, and the ratchet 91 rotates along the circumferential area enclosed by the short side of the ratchet groove 95. The ratchet ring 9 rotates accordingly, thereby driving the traveling wheel 8 to rotate and realize the forward movement of the equipment.

[0027] When motor 2 30 drives shaft 121 to rotate in the opposite direction, ratchet 91 moves in a circular motion along the circumferential area enclosed by the long side of ratchet groove 95. Since ratchet 91 cannot be inserted into ratchet groove 95 to drive ratchet ring 9 to rotate, ratchet ring 9 and traveling wheel 8 will not rotate, and the equipment will not move.

[0028] A baffle is installed at the back of the shovel to prevent the excavated soil from falling off when the shovel moves upward. When it moves to the corresponding guide groove, the soil slides into the guide groove and the guide groove directs the soil to the soil turning groove. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0030] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0032] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 3 ;

[0033] Figure 4This is a partial three-dimensional structural diagram of the present invention;

[0034] Figure 5 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 4 .

[0035] In the diagram: 1. Vertical rod; 2. Shovel; 3. Auxiliary walking wheel; 4. Frame; 5. Motor; 6. Support rod; 61. Connecting column; 7. Support plate; 71. Opening; 8. Walking wheel; 9. Ratchet ring; 91. Ratchet; 92. Torsion spring; 93. Ring; 94. Fixed wheel; 95. Ratchet groove; 10. Handle; 11. Fixed seat; 12. Sprocket; 121. Rotating shaft; 13. Chain; 15. Swing plate; 16. Tilting rod; 17. Extending arm; 20. Arc-shaped slide rail; 21. Linear slide rail; 22. Limiting column; 23. Moving block; 24. Guide shaft; 25. Fixed block; 26. Screw; 27. Soil turning trench; 271. Slide rail; 28. Partition plate; 29. ​​Guide groove; 30. Motor II. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] A soil turning and screening machine for soil improvement includes a frame 4, a soil layering and stirring component is provided in the middle of the frame 4, a soil digging and transporting component is provided at the front end of the frame 4, and a walking component is connected to the rear end of the frame 4.

[0038] The soil stratification and stirring assembly includes a support plate 7. Symmetrical arc-shaped slide rails 20 are provided on both sides of the support plate 7. Each arc-shaped slide rail 20 is provided with a limiting post 22. The upper end of each limiting post 22 is fixedly connected to a swing plate 15. The swing plate 15 is L-shaped. The long rod end of the swing plate 15 is hinged to the support plate 7. The upper middle part of the support plate 7 is fixedly connected to a soil turning trough 27. One end of each swing plate 15 in the soil turning trough 27 is fixedly connected to a plurality of evenly arranged turning rods 16. The arc-shaped wall of the soil turning trough 27 is provided with a plurality of slide rails 271. All slide rails 271 are arranged sequentially from top to bottom. Each slide rail 271 is matched with a corresponding extension arm 17.

[0039] The support plate 7 has symmetrically arranged openings 71 at the position corresponding to the soil turning trough 27, and the bottom of the soil turning trough 27 has a set of evenly arranged circumferentially arranged soil leakage grooves.

[0040] The lower parts of the two limiting posts 22 on the same side are respectively set at both ends of the linear slide rail 21. The lower middle part of the linear slide rail 21 is respectively fixedly connected to the moving block 23. The two moving blocks 23 are respectively threaded to both ends of the screw 26. The two ends of the screw 26 are threaded in opposite directions. The middle part of the screw 26 is connected to the fixing block 25. The fixing block 25 is fixed to the lower middle part of the support plate 7. The two ends of the two linear slide rails 21 are passed through by the guide shaft 24. The two ends of the guide shaft 24 are respectively fixedly connected to the support rod 6. The upper ends of each support rod 6 are respectively fixed to the support plate 7 by the connecting post 61.

[0041] The motor 5 is fixed at the middle position on one side of the support plate 7, and the motor 5 is fixed to one end of the screw 26.

[0042] In use, the soil in the soil turning trough 27 is turned into layers by the soil layering and stirring component. The motor 5 is a stepper motor. The output shaft of the motor 5 rotates and drives the screw 26 to rotate. The screw 26 drives the moving block 23 to move. The moving block 23 drives the linear slide rail 21 to move. The linear slide rail 21 drives the limiting post 22 to move within the corresponding arc-shaped slide rail 20. The limiting post 22 drives the swing plate 15 to swing. The swing plate 15 drives the extension arm 17 to reciprocate. The extension arm 17 drives the turning rod 16 to circulate, thus stirring the soil at different depths.

[0043] The walking assembly includes symmetrically arranged walking wheels 8, which are respectively located on both sides of the rear end of the frame 4. The walking wheels 8 are respectively connected to both ends of a rotating shaft 121 via a ratchet assembly. The rotating shaft 121 is respectively bearing connected to the two sides of the frame 4. The rotating shaft 121 passes through a fixed seat 11, which is fixed to the upper rear side of the frame 4. A sprocket 12 is fixedly connected to the middle of the rotating shaft 121. The sprocket 12 is connected to another sprocket 12 via a chain 13. The other sprocket 12 is fixed to the center of another rotating shaft 121. The two ends of the other rotating shaft 121 are respectively bearing connected to vertical rods 1. The upper ends of the two vertical rods 1 are fixed to the upper front end of the frame 4. The middle part of the other rotating shaft 121 is respectively fixedly connected to the rear ends of symmetrically arranged shovels 2. The two shovels 2 are respectively located on both sides of the sprocket 12. A second motor 30 is fixed to the vertical rod 1. The output shaft of the second motor 30 is fixedly connected to one end of the corresponding rotating shaft 121.

[0044] In this embodiment, the rotating shaft 121 is driven by the second motor to rotate, which in turn drives the sprocket 12 to rotate. The sprocket 12 then drives another sprocket 12 to rotate via the chain 13, ultimately causing the rotating shaft 121 to rotate. The rotating shaft 121 drives the walking component through the ratchet assembly to achieve the walking function, enabling the walking wheel 8 to rotate and move. Simultaneously, during the counterclockwise rotation of the rotating shaft 121 driven by the second motor, the shovel 2 swings upward to dig soil and transfer it into the soil turning trough 27. During the clockwise rotation of the rotating shaft 121 driven by the second motor, the shovel 2 swings downward to return to its original position. During this process, due to the action of the ratchet assembly, the walking wheel 8 stops rotating and stops moving.

[0045] The ratchet assembly includes a ratchet ring 9, which is fixed to the center of the travel wheel 8. The inner outer end of the ratchet ring 9 has a set of circumferentially evenly arranged and continuous ratchet grooves 95. These grooves 95 match ratchet teeth 91. Each ratchet groove 95 forms a slot for the ratchet teeth 91 by a long side and a short side. When the ratchet teeth 91 rotate along the circumferential area enclosed by the long side of the ratchet groove 95, the ratchet ring 9 will not rotate. When the circumferential area enclosed by the sides rotates, the ratchet 91 is locked by the short side of the ratchet groove 95 and will not disengage from the ratchet groove 95 that locks the ratchet 91. The ratchet ring 9 can rotate with the ratchet 91. The ratchet 91 is rotatably connected to the fixed wheel 94. The fixed wheel 94 is fixedly rotatably connected to the ratchet ring 9. The fixed wheel 94 fixes the ring 93. The ring 93 is fixedly connected to the end of the corresponding rotating shaft 121. The ratchet 91 is fixedly connected to the outer wall surface of the ring 93 by the torsion spring 92.

[0046] In this embodiment, the ratchet ring 9 is fixed at the center of the traveling wheel 8. A set of circumferentially evenly arranged and continuous ratchet grooves 95 are provided on its inner and outer ends. The ratchet 91 matches the ratchet grooves 95 and can be inserted into the ratchet grooves 95. The ratchet 91 is designed to be able to rotate in one direction, that is, it can rotate freely in one direction, while it is stuck by the ratchet grooves 95 in the other direction. The ratchet 91 is fixedly connected to the outer wall of the ring 93 by the torsion spring 92. The torsion spring 92 provides the necessary elastic force for the ratchet 91 so that it can contact the ratchet grooves 95 tightly. The fixed wheel 94 is fixedly rotatably connected to the ratchet ring 9 to maintain the stability of the ratchet ring 9. The ring 93 is fixedly connected to the fixed wheel 94 and transmits force to the rotating shaft 121 through the connection between the ratchet 91 and the torsion spring 92. The rotating shaft 121 passes through the fixed seat 11 and is connected to the frame 4. It is the connection point between the ratchet assembly and the traveling wheel 8.

[0047] When the motor 2 30 drives the rotating shaft 121 to rotate, the ratchet 91 is engaged with the ratchet groove 95 under the action of the torsion spring 92, and the ratchet 91 rotates along the circumferential area enclosed by the short side of the ratchet groove 95. The ratchet 91 is stuck in a ratchet groove 95 and rotates, and the ratchet ring 9 rotates accordingly, thereby driving the traveling wheel 8 to rotate and realize the forward movement of the equipment.

[0048] When motor 2 30 drives shaft 121 to rotate in the opposite direction, ratchet 91 moves in a circular motion along the circumferential area enclosed by the long side of ratchet groove 95. Since ratchet 91 cannot be inserted into ratchet groove 95 to drive ratchet ring 9 to rotate, ratchet ring 9 and traveling wheel 8 will not rotate, and the equipment will not move.

[0049] The rear end of the frame 4 is fixedly connected to the handle 10, and the lower front end of the frame 4 is provided with auxiliary walking wheels 3.

[0050] A partition plate 28 is fixed to the inner rear end of the shovel 2. A symmetrical guide groove 29 is fixed to the upper side of the soil turning trough 27 near the end of the shovel 2. The other end of the guide groove 29 is located above the rear end of the shovel 2.

[0051] The partition 28 can block the soil and prevent the soil from falling outside during the upward swing of the shovel 2. The guide groove 29 is inclined and the higher end corresponds to the shovel 2. After the shovel 2 pours the soil into the guide groove 29, it slides down the guide groove 29 into the soil turning groove 27.

[0052] When in use, move the soil turning and screening machine to the area where soil improvement is needed, and adjust the position of the equipment using the auxiliary walking wheels 3 to ensure stability. Start the motor 5, and start and adjust the soil stratification and stirring components by controlling the rotation direction and speed of the motor to stratify and stir the soil. If necessary, start the second motor 30 and control the rotation direction of the rotating shaft 121 to realize the digging and transporting functions of the shovel 2. Send the soil into the turning trough 27 through the guide groove 29. Control the rotation of the second motor 30 to move the equipment forward and stop. After completing the soil improvement of a certain area, check the uniformity of the soil and the improvement effect, and make adjustments or repeat the operation if necessary.

[0053] This invention also provides a method for using a soil turning and screening machine for soil improvement, comprising the following steps:

[0054] Step 1: When using the machine, move it to the area where the soil needs to be improved, and adjust the position of the machine using the auxiliary walking wheels 3 to ensure stability.

[0055] Step 2: Start motor 5. By controlling the rotation direction and speed of the motor, the soil stratification mixing component is started and adjusted to stratify and mix the soil.

[0056] Step 3: As needed, start motor 2 30 and control the rotation direction of shaft 121 to realize the digging and transporting functions of shovel 2. The soil is sent into the turning trough 27 through guide groove 29. By controlling the rotation of motor 2, the forward and stop of the equipment can be realized. When it is necessary to stop the movement of the equipment, the one-way locking function of the ratchet assembly is used to ensure the stability of the equipment.

[0057] Step 4: After completing the soil improvement in a certain area, check the uniformity of the soil and the improvement effect, and make adjustments or repeat the operation if necessary.

[0058] In step two, the output shaft of the motor 5 of the soil stratification and stirring assembly rotates, driving the screw 26 to rotate. The screw 26 drives the moving block 23 to move, the moving block 23 drives the linear slide rail 21 to move, the linear slide rail 21 drives the limiting post 22 to move within the corresponding arc-shaped slide rail 20, the limiting post 22 drives the swing plate 15 to swing, the swing plate 15 drives the extension arm to reciprocate, and the extension arm drives the turning rod 16 to circulate, thus stirring the soil at different depths.

[0059] In step three, when motor 2 30 drives the rotating shaft 121 to rotate, the ratchet 91 is engaged with the ratchet groove 95 under the action of the torsion spring 92, and the ratchet 91 rotates along the circumferential area enclosed by the short side of the ratchet groove 95. The ratchet ring 9 rotates accordingly, thereby driving the traveling wheel 8 to rotate, realizing the forward movement of the equipment. When motor 2 30 drives the rotating shaft 121 to rotate in the opposite direction, the ratchet 91 makes a circular motion along the circumferential area enclosed by the long side of the ratchet groove 95. The ratchet 91 cannot be inserted into the ratchet groove 95 to drive the ratchet ring 9 to rotate. Therefore, the ratchet ring 9 and the traveling wheel 8 will not rotate, and the equipment will not move.

[0060] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A soil conditioning and turning screener comprising a frame (4) characterised in that: The middle part of the frame (4) is provided with a soil layering stirring assembly, the head end of the frame (4) is provided with a soil digging and transporting assembly, and the rear end of the frame (4) is connected with a walking assembly; The soil layering stirring assembly comprises a support plate (7), symmetrically arc-shaped slide rails (20) are formed in the two sides of the support plate (7), respectively, a limiting column (22) is arranged in each arc-shaped slide rail (20), respectively, the upper end of each limiting column (22) is fixedly connected with a swing plate (15), the swing plate (15) is L-shaped, the long rod end of the swing plate (15) is hingedly connected with the support plate (7), the upper middle part of the support plate (7) is fixedly connected with a soil turning groove (27), one end of each swing plate (15) in the soil turning groove (27) is fixedly connected with a plurality of turning rods (16) arranged uniformly through an extension arm (17), respectively, a plurality of slide rails (271) are formed in the arc-shaped wall surface of the soil turning groove (27), all the slide rails (271) are arranged in sequence from top to bottom, and each slide rail (271) is matched with a corresponding extension arm (17) in the slide rail (271); The support plate (7) is provided with symmetrically arranged openings (71) corresponding to the position of the soil turning groove (27), and a group of soil leakage grooves are uniformly arranged on the bottom of the soil turning groove (27); The lower parts of the two limiting columns (22) on the same side are arranged at the two ends of a straight slide rail (21), respectively, the middle lower part of the straight slide rail (21) is fixedly connected with a moving block (23), respectively, the two ends of the screw rod (26) are threadedly connected with the two moving blocks (23), respectively, the two ends of the screw rod (26) are reversely arranged in screw threads, the middle part of the screw rod (26) is bearing-connected with a fixed block (25), the fixed block (25) is fixed on the lower middle part of the support plate (7), the two ends of the straight slide rail (21) are penetrated by a guide shaft (24), the two ends of the guide shaft (24) are fixedly connected with a support rod (6), respectively, the upper two ends of each support rod (6) are fixed with the support plate (7) through a connecting column (61).

2. A soil conditioning and screening machine as claimed in claim 1 wherein: A motor (5) is fixed on one side of the middle part of the support plate (7), and the motor (5) is fixed with one end of the screw rod (26).

3. A soil conditioning and screening machine as claimed in claim 2, wherein: The walking assembly comprises symmetrically arranged walking wheels (8) arranged on both sides of the rear end of the frame (4), respectively connected to both ends of the rotating shaft (121) through a ratchet and pawl assembly, bearing connected to both sides of the rear end of the frame (4), penetrating the fixing seat (11) fixed on the upper rear end of the frame (4), and fixedly connected to the chain wheel (12) at the middle part of the rotating shaft (121), connected to another chain wheel (12) through the chain (13), and fixed at the center of another rotating shaft (121), and the two ends of another rotating shaft (121) are respectively bearing connected to the vertical rod (1), and the upper end of the two vertical rods (1) is fixed to the upper side of the front end of the frame (4), and the middle part of another rotating shaft (121) is fixedly connected to the rear end of the symmetrically arranged shovel (2), and the two shovels (2) are arranged on both sides of the chain wheel (12), and the vertical rod (1) is fixed to the motor two (30), and the output shaft of the motor two (30) is fixedly connected to one end of the corresponding rotating shaft (121).

4. A soil conditioning and screening machine as claimed in claim 3, wherein: The ratchet and pawl assembly comprises a ratchet ring (9) fixed at the center of the walking wheel (8), a group of circumferentially arranged and continuous ratchet grooves (95) arranged on the inner side of the ratchet ring (9), a ratchet (91) matched with the ratchet groove (95), a clamping groove formed by a long side and a short side of the ratchet groove (95) matched with the ratchet (91), the ratchet ring (9) does not rotate when the ratchet (91) rotates along the circumferential area formed by the long side of the ratchet groove (95), the ratchet (91) is clamped by the short side of the ratchet groove (95) when it rotates along the circumferential area formed by the short side of the ratchet groove (95), the ratchet (91) is clamped by the ratchet groove (9), the ratchet ring (9) can rotate with the ratchet (91), the ratchet (91) is rotatably connected to the fixed wheel (94), the fixed wheel (94) is fixedly connected to the ratchet ring (9), the fixed wheel (94) is fixed to the circular ring (93), the circular ring (93) is fixedly connected to the end of the corresponding rotating shaft (121), and the ratchet (91) is fixedly connected to the outer wall surface of the circular ring (93) through the torsion spring (92).

5. A soil conditioning and screening machine as claimed in claim 4, wherein: The rear end of the frame (4) is fixedly connected to the handle (10), and the lower ends of the front end of the frame (4) are respectively provided with auxiliary walking wheels (3).

6. The method of using a soil conditioning tillage screener of claim 5, wherein: The rear end of the shovel (2) is fixedly connected to the partition plate (28), the upper side of the soil turning groove (27) is fixedly connected to the symmetrically arranged guide groove (29) near one end of the shovel (2), and the other end of the guide groove (29) is arranged above the rear end of the shovel (2).

7. A method of using a soil conditioning tillage screener as claimed in claim 6, characterised by: The steps include: Step one: when in use, move the soil turning and screening machine to the soil area that needs to be improved, adjust the position of the equipment through the auxiliary walking wheels (3), and ensure the stability of the equipment; Step two: start the motor (5), by controlling the rotation direction and speed of the motor, to realize the start and adjustment of the soil layering agitation assembly, and to agitate the soil layer by layer; Step three: according to the need, start motor two (30), control the rotation direction of the rotating shaft (121), realize the digging and transportation function of the shovel (2), send the soil into the soil turning groove (27) through the guide groove (29), control the rotation of the motor two, realize the forward and stop of the equipment, when the equipment needs to stop moving, use the function of the ratchet and pawl assembly to ensure the stability of the equipment; Step four: after completing the soil improvement in a certain area, check the uniformity and improvement effect of the soil.

8. The method of using a soil conditioning tillage screener as defined in claim 7, wherein In step two, the output shaft of the motor (5) of the soil layering agitation assembly rotates to drive the screw rod (26) to rotate, the screw rod (26) drives the moving block (23) to move, the moving block (23) drives the linear slide rail (21) to move, the linear slide rail (21) drives the limiting column (22) to move in the corresponding arc slide rail (20), the limiting column (22) drives the swing plate (15) to swing, the swing plate (15) drives the extension arm to reciprocate, and the extension arm drives the turning rod (16) to circulate, to agitate the soil at different depths.

9. The method of using a soil conditioning tillage screener of claim 7, wherein In step three, when the motor two (30) drives the rotating shaft (121) to rotate, the ratchet (91) is in meshing state with the ratchet groove (95) under the action of the torsional spring (92), and the ratchet (91) rotates in the ratchet groove (95) along the short side of the ratchet groove (95) to form a circumferential area, the ratchet (91) is clamped in a ratchet groove (95) to rotate, the ratchet ring (9) rotates accordingly, thereby driving the walking wheel (8) to rotate, to realize the forward movement of the equipment; When the motor two (30) drives the rotating shaft (121) to rotate reversely, the ratchet (91) makes circular motion along the circumferential area formed by the long side of the ratchet groove (95), the ratchet (91) cannot insert into the ratchet groove (95) to drive the ratchet ring (9) to rotate, so the ratchet ring (9) and the walking wheel (8) will not rotate, and the equipment will not move.

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