Device and method for stripping and recovering cultivated layer

Abstract

The present application relates to the technical field of agricultural machinery, and in particular to a device and method for stripping and recovering a cultivated layer, which comprises a driving vehicle and a mounting plate arranged on the driving vehicle, a cultivating roller and a filter roller being rotatably connected on the mounting plate, the cultivating roller being sleeved on the outside of the filter roller, a collecting chamber being provided in the cultivating roller, a filter chamber being provided in the filter roller, a mounting hole penetrating the cultivating roller being provided on the wall of the cultivating roller, a feed hole penetrating the filter roller being provided on the wall of the filter roller, a rotary digging knife being provided on the wall of the filter roller, the rotary digging knife passing through the mounting hole and communicating with the feed hole; a filter slot being provided on the wall of the filter roller, a filter screen being provided on the filter roller at the filter slot, a backfill slot being provided on the cultivating roller, and a backfilling assembly for opening and closing the backfill slot being provided on the cultivating roller. The present application facilitates stripping, filtering and backfilling of the topsoil of the cultivated layer, and helps to improve work efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of agricultural machinery, and in particular to a device and method for stripping and recovering a tillage layer. Background Art

[0002] A tiller is usually used to dig and turn the soil in the tillage layer. The tiller includes a driving trolley and a tillage blade. The driving trolley drives the tillage blade to contact the topsoil of the tillage layer during driving, so that the topsoil is dug to both sides of the tillage blade. The topsoil on both sides of the tillage blade is collected by a collecting device, and the gravel and sand in the topsoil are filtered before backfilling.

[0003] With respect to the above technical solution, the inventors found that after excavating the topsoil, the topsoil needs to be collected manually, then transported to a filtering device, and then the filtered topsoil is loaded into a backfilling machine for backfilling, which results in low operating efficiency. Summary of the invention

[0004] In order to solve the problem of low efficiency in stripping, collecting and recovering topsoil, the present application provides a device and method for stripping and recovering the tillage layer.

[0005] On the one hand, the present application provides a device for stripping and recovering a tillage layer, which adopts the following technical scheme: a device for stripping and recovering a tillage layer, comprising a driving vehicle and a mounting plate arranged on the driving vehicle, a tillage roller and a filter roller being rotatably connected to the mounting plate, the tillage roller being sleeved on the outside of the filter roller, a collecting chamber being provided in the tillage roller, a filter chamber being provided in the filter roller, a mounting hole penetrating the tillage roller being provided on the wall of the tillage roller, a feed hole penetrating the filter roller being provided on the wall of the filter roller, a rotary digging knife being provided on the wall of the filter roller, the rotary digging knife passing through the mounting hole and communicating with the feed hole; a filter groove being provided on the wall of the filter roller, a filter screen being provided on the filter roller at the filter groove, a backfill groove being provided on the tillage roller, and a backfill assembly for opening and closing the backfill groove being provided on the tillage roller.

[0006] By adopting the above technical scheme, when the tillage roller rotates, the rotary cutter excavates the topsoil of the tillage layer, peels off the topsoil, and allows the topsoil to enter the filter chamber; the fine topsoil is filtered through the filter and enters the collecting chamber. When the backfill slot is opened, the filtered topsoil falls out of the collecting chamber to backfill the ground; while large pieces of gravel remain in the filter chamber, which makes it easy to collect and filter the topsoil and backfill. It is easy to operate and helps to improve work efficiency.

[0007] In a specific possible implementation scheme, a connecting seat is provided on the outer wall of the filter roller, the rotary digging knife is rotatably connected to the connecting seat, and a rotating assembly for storing the rotary digging knife is provided between the filter roller and the tillage roller.

[0008] By adopting the above technical solution and setting a rotating component, when the tillage roller rotates forward, relative rotation occurs between the tillage roller and the filter roller, thereby driving the rotary digging cutter to rotate, so that the rotary digging cutter can be stored and the rotary digging cutter does not contact the tillage layer, which is convenient for the subsequent recovery of the tillage layer.

[0009] In a specific possible implementation scheme, the rotating assembly includes a ratchet and a pawl, the pawl is rotatably connected to the inner wall of the tillage roller, the ratchet is arranged on the filter roller, the ratchet is meshed with the pawl, and a driving member is provided on the mounting plate, and the driving member is transmission-connected to the tillage roller.

[0010] By adopting the above technical scheme, the tillage roller is driven to rotate by the driving member, and the tillage roller drives the ratchet to rotate. When the ratchet rotates in the forward direction, it can drive the filter roller and the tillage roller to rotate together, so that the rotary cutter excavates the tillage layer; when the ratchet rotates in the reverse direction, the tillage roller rotates and the filter roller remains stationary, so that the tillage roller can drive the rotary cutter to rotate, thereby facilitating the separation of the rotary cutter from the soil.

[0011] In a specific possible implementation scheme, the backfill assembly includes a closing plate and an elastic member, a receiving groove for accommodating the closing plate is opened in the backfill groove, the closing plate is slidably connected in the receiving groove, the elastic member is arranged in the receiving groove, one end of the elastic member contacts the inner wall of the receiving groove, and the other end contacts the side wall of the closing plate.

[0012] By adopting the above technical solution, a closing plate is set, and the closing plate slides in the receiving groove. Under the action of the spring, the closing plate can close the backfill groove. When the cultivated layer needs to be backfilled, it is only necessary to open the closing plate, and the topsoil can fall out of the backfill groove, which is convenient for backfilling the cultivated layer and easy to operate.

[0013] In a specific implementation scheme, a connecting plate is provided on the side wall of the driving vehicle facing the tilling roller, a pushing plate is provided on the connecting plate, an opening plate is rotatably connected to the outer wall of the closing plate, and the pushing plate is used to push the opening plate.

[0014] By adopting the above technical solution and setting a pushing plate, when the opening plate contacts the pushing plate during the rotation of the tillage roller, the pushing plate drives the closing plate to squeeze the spring, so that the backfill groove can be automatically opened, which is convenient for backfilling the tillage layer. The operation is convenient and helps to further improve the backfilling efficiency.

[0015] In a specific possible implementation manner, a plurality of the backfill grooves are provided, a plurality of the closing plates are provided, and linkage components are provided between the plurality of closing plates.

[0016] By adopting the above technical solution, by setting up multiple backfill grooves, it is convenient for the topsoil to fall out of the backfill grooves, which helps to improve the recovery efficiency. By setting up a linkage component, when an opening plate contacts the push plate, it can drive other backfill grooves to open at the same time, which is convenient for the topsoil to fall out of the backfill grooves, which helps to further improve the recovery efficiency.

[0017] In a specific possible implementation mode, the linkage assembly includes a linkage block and a linkage rod, the linkage block is arranged on a side of the closing plate away from the opening plate, and the linkage rod is arranged between two adjacent linkage blocks.

[0018] By adopting the above technical solution, a linkage rod is set, and the linkage rod connects multiple closing plates. When one opening plate drives a closing plate to open, one closing plate can drive other closing plates to open through the linkage rod. The operation is convenient, and the topsoil is easy to fall out of the tillage roller, which helps to improve the recovery efficiency.

[0019] In a specific possible implementation mode, a collecting box is provided at one end of the filter roller, the filter cavity is connected to the collecting box, and a spiral blade is provided on the inner wall of the filter roller, and the spiral blade extends toward a side close to the collecting box.

[0020] By adopting the above technical solution, by arranging spiral blades in the filter roller, when the topsoil of the cultivated layer enters the filter chamber, the filter roller drives the spiral blades to rotate, and the spiral blades guide the gravel, so that the gravel is discharged from the filter roller and enters the collection box, thereby facilitating the filtering of the topsoil.

[0021] In a specific implementation scheme, a fixed plate is rotatably connected to the side wall of the driving vehicle away from the mounting plate, a pressure roller is rotatably connected to the fixed plate, and a first pushing member is rotatably connected to the driving vehicle, and the first pushing member is rotatably connected to the fixed plate.

[0022] By adopting the above technical solution, by setting the pressure roller on the side away from the mounting plate, after the tillage layer is excavated and returned, the pressure roller can contact the ground and press and level the returned tillage layer; by setting the first pushing member, when the tillage layer is excavated, the first pushing member lifts the pressure roller so that the pressure roller does not contact the tillage layer, thereby facilitating the excavation of the tillage layer.

[0023] On the other hand, the present application provides a method for stripping and recovering a cultivated layer, which is used in conjunction with the above-mentioned device for stripping and recovering a cultivated layer, and comprises the following steps:

[0024] S1: Topsoil stripping: excavating the soil layer on the surface of the cultivated layer;

[0025] S2: Topsoil collection: Collect the excavated topsoil and the gravel in the topsoil;

[0026] S3: Filter gravel: Filter gravel in the topsoil;

[0027] S4: Topsoil backfill: Return the filtered topsoil and reuse it;

[0028] S5: Ground leveling: Press and level the recovered tillage layer.

[0029] By adopting the above technical solution, the excavation, stripping and recovery of the tillage layer are realized on the stripping and recovery device of the tillage layer, which simplifies the stripping and recovery method of the tillage layer and helps to improve work efficiency.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. When the tillage roller is rotating, the rotary digging knife excavates the topsoil of the tillage layer, peels off the topsoil, and allows the topsoil to enter the filter chamber; the fine topsoil is filtered by the filter and enters the collection chamber, and the filtered topsoil falls out of the collection chamber to backfill the ground; large pieces of gravel remain in the filter chamber, which is convenient for collecting and filtering the topsoil and backfilling, easy to operate, and helps to improve work efficiency;

[0032] 2. By setting a push plate, when the tillage roller is rotating, when the opening plate contacts the tillage roller, the backfill groove can be opened automatically; by setting an elastic member, the backfill groove can be closed automatically;

[0033] 3. By setting up a linkage component, when an opening plate contacts the push plate, it can drive other backfill slots to open at the same time, making it easier for the topsoil to fall out of the backfill slots, which helps to further improve the recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0035] Figure 2 It is a schematic diagram of the positional relationship between the first oil cylinder and the second oil cylinder in an embodiment of the present application.

[0036] Figure 3 It is a cross-sectional view of the internal structure of the filter roller of the tilling roller in the embodiment of the present application.

[0037] Figure 4 It is a schematic diagram of the structure of the filter roller in the embodiment of the present application.

[0038] Figure 5 It is a schematic diagram of the positional relationship between the backfill component and the filter in the embodiment of the present application.

[0039] Figure 6 It is a schematic diagram of the positional relationship between the opening plate and the push plate in the embodiment of the present application.

[0040] Figure 7 It is a structural diagram of the linkage component in the embodiment of the present application.

[0041] Figure 8 yes Figure 3 Enlarged view of point A in the middle.

[0042] Description of reference numerals:

[0043] 1. Driving vehicle; 11. Mounting plate; 12. Cultivating roller; 13. Driving motor; 14. First gear; 15. Second gear; 16. Push rod; 17. First oil cylinder; 18. Fixing plate; 19. Pressing roller; 20. Driving rod; 21. Pushing oil cylinder; 22. Collecting chamber; 23. Filter roller; 24. Filter chamber; 25. Connecting seat; 26. Rotary cutter; 27. Cavity; 28. Mounting hole; 29. ​​Filter tank; 30. Filter screen; 31. Spiral blade; 32. Guide platform; 33. Guide chamber; 34. Backfilling tank; 35. Backfilling assembly; 36. Closing plate; 37. Spring; 38. Accommodating slot; 39. Card slot; 40. Opening plate; 41. Connecting plate; 42. Pushing plate; 43. Linkage assembly; 44. Linkage block; 45. Linkage rod; 46. Ratchet; 47. Ratchet. DETAILED DESCRIPTION

[0044] The present application is further described in detail below in conjunction with the accompanying drawings.

[0045] The present application discloses a device for stripping and recovering the tillage layer, referring to Figure 1 The device for stripping and recovering the cultivated layer includes a driving vehicle 1, and mounting plates 11 are hingedly connected on opposite side walls of the driving vehicle 1, and a cultivating roller 12 is rotatably connected between the two mounting plates 11. A driving motor 13 is fixed on the mounting plate 11, and a first gear 14 is coaxially fixed on the output shaft of the driving motor 13. A second gear 15 is coaxially fixed on one side of the cultivating roller 12, and the first gear 14 is meshed with the second gear 15. The first gear 14 is driven to rotate by the driving motor 13, and the first gear 14 drives the second gear 15 to rotate, thereby driving the cultivating roller 12 to rotate.

[0046] Reference Figure 2A push rod 16 is fixed between the two mounting plates 11, and a first oil cylinder 17 is hinged on the side wall of the driving vehicle 1 facing the tilling roller 12, and the first oil cylinder 17 is hinged to the push rod 16. A fixing plate 18 is rotatably connected to the opposite side walls of the driving vehicle 1 at one end away from the tilling roller 12, and a pressure roller 19 is rotatably connected between the two fixing plates 18. A driving rod 20 is fixed between the two fixing plates 18, and a pushing oil cylinder 21 is hinged on the side wall of the driving vehicle 1 facing the pressure roller 19, and the pushing oil cylinder 21 is hinged to the driving rod 20. The piston rod of the pushing oil cylinder 21 is extended to separate the pressure roller 19 from the ground, and the piston rod of the pushing oil cylinder 21 is retracted, and the pressure roller 19 contacts the ground. When the driving vehicle 1 is traveling, the pressing roller 19 does not contact the ground first. After the tillage roller 12 completes the digging, collection, filtering and returning of the tillage layer, the piston rod of the oil cylinder 21 is retracted to make the pressing roller 19 contact the tillage layer to compact and level the tillage layer.

[0047] Reference Figure 3 and Figure 4 The tillage roller 12 is provided with a collecting chamber 22, and a filter roller 23 is provided in the collecting chamber 22. The filter roller 23 is coaxially arranged with the tillage roller 12, and the filter roller 23 is rotatably connected with the tillage roller 12 through a bearing. The filter roller 23 is provided with a filter chamber 24, and a feed hole penetrating the filter roller 23 is provided on the wall of the filter roller 23. A connecting seat 25 is provided on the outer wall of the filter roller 23, and a rotary digging knife 26 is hinged on the connecting seat 25. A cavity 27 penetrating the rotary digging knife 26 is provided in the rotary digging knife 26, and the cavity 27 is connected with the filter chamber 24 through the feed hole. The tillage roller 12 is provided with a mounting hole, and the rotary digging knife 26 penetrates the mounting hole. The rotary digging knife 26 is cylindrical, and the end of the rotary digging knife 26 away from the filter roller 23 is semi-enclosed. During use, the rotary digging knife 26 contacts the tillage layer, and the rotary digging knife 26 excavates the topsoil of the tillage layer during rotation, so that the topsoil enters the filter chamber 24 through the cavity 27.

[0048] Reference Figure 3 A filter groove 29 penetrating the process cavity is provided on the wall of the filter roller 23, and a filter screen 30 is fixed at the filter groove 29. A spiral blade 31 is fixed on the inner wall of the filter roller 23, and a collection box (not shown in the figure) is provided on one side of the filter roller 23. The collection box is fixed on the driving vehicle 1, and the filter cavity 24 is connected to the collection box. The spiral blade 31 is spirally arranged toward one side of the collection box. A guide platform 32 is fixed on the inner wall of the filter roller 23 close to the collection box. A guide cavity 33 is provided in the guide platform 32. The guide cavity 33 is in a truncated cone shape, and the diameter of the guide cavity 33 gradually decreases toward the side close to the collection box.

[0049] Reference Figure 3When the filter roller 23 rotates, the filter screen 30 can filter the topsoil of the cultivated layer. The filtered topsoil falls into the collecting chamber 22 through the filter trough 29, and the gravel in the topsoil is retained in the filter chamber 24. Under the guidance of the spiral blade 31 and the guide platform 32, the gravel is discharged from the filter chamber 24 into the collecting box, thereby facilitating the filtering of the gravel in the topsoil and facilitating the operation.

[0050] Reference Figure 5 The tillage roller 12 is provided with a plurality of backfilling grooves 34 penetrating the tillage roller 12, and a backfilling assembly 35 for opening and closing the backfilling groove 34 is provided at the backfilling groove 34. The backfilling assembly 35 includes a closing plate 36 and an elastic member. A receiving groove 38 is provided in the backfilling groove 34, and the closing plate 36 and the elastic member are both arranged in the receiving groove 38, and the closing plate 36 and the receiving groove 38 are slidably matched. The elastic member is specifically a spring 37, and one end of the spring 37 contacts the closing plate 36, and the other end contacts the inner wall of the receiving groove 38. A clamping groove 39 is also provided in the backfilling groove 34, and the clamping groove 39 is arranged on the side opposite to the receiving groove 38. Under the pressing action of the spring 37, the closing plate 36 can be engaged with the clamping groove 39 to keep the backfilling groove 34 in a closed state.

[0051] Reference Figure 6 The side of the closing plate 36 away from the tillage roller 12 is hinged with an opening plate 40, and the opening plate 40 is provided to facilitate opening the closing plate 36. A connecting plate 41 is fixed to the side of the driving vehicle 1 facing the tillage roller 12, and a pushing plate 42 is fixed to the connecting plate 41. When the tillage roller 12 rotates, the pushing plate 42 contacts the opening plate 40, so that the backfilling groove 34 can be opened, so that the topsoil in the collection chamber 22 can fall out and the tillage layer can be backfilled.

[0052] Reference Figure 6 and Figure 7 A linkage assembly 43 is provided between the multiple closed plates 36. The linkage assembly 43 includes a linkage block 44 and a linkage rod 45. The linkage block 44 is fixed to one end of the closed plate 36 away from the opening plate 40, and the linkage rod 45 is fixed between two adjacent linkage blocks 44. By providing the linkage rod 45 and the linkage block 44, when the push plate 42 contacts an opening plate 40, the push plate 42 drives one opening plate 40 to open, and can drive multiple opening plates 40 to open at the same time, thereby improving the backfilling efficiency.

[0053] Reference Figure 8 A rotating assembly is provided between the tillage roller 12 and the filter roller 23, and the rotating assembly includes a ratchet 47 and a pawl 46. The pawl 46 is rotatably connected to the inner wall of the tillage roller 12, and the ratchet 47 is coaxially fixed to the outer wall of the filter roller 23, and the ratchet 47 is meshed with the pawl 46. When the driving motor 13 drives the tillage roller 12 to rotate in the forward direction, the ratchet 47 and the pawl 46 are relatively stationary, and the tillage roller 12 drives the filter roller 23 to rotate together, and the filter roller 23 rotates in the forward direction. Figure 3, the rotary cutter 26 excavates the topsoil of the cultivated layer, and the filter roller 23 filters the gravel in the topsoil, so that the topsoil enters the collecting chamber 22. When rotating forward, under the pushing action of the push plate 42, the opening plate 40 rotates along the hinge shaft, so that the push plate 42 and the opening plate 40 will not get stuck when the tillage roller 12 rotates forward. When the driving motor 13 drives the tillage roller 12 to rotate in the reverse direction, the ratchet 47 and the pawl 46 rotate relative to each other, and the filter roller 23 and the tillage roller 12 rotate relative to each other, and the combination Figure 6 The tillage roller 12 drives the rotary digging cutter 26 to rotate during the rotation process, so that the rotary digging cutter 26 does not contact the topsoil of the tillage layer. At the same time, the push plate 42 drives the closing plate 36 to open, so that the soil in the collecting chamber 22 falls out, which is convenient for backfilling the tillage layer.

[0054] The present application also discloses a method for stripping and recovering a tillage layer, comprising the following steps:

[0055] S1: stripping of topsoil: the driving motor 13 drives the tillage roller 12 and the filter roller 23 to rotate together, and the rotary digging cutter 26 digs the soil layer on the surface of the tillage layer;

[0056] S2: Topsoil collection: The excavated topsoil and the gravel in the topsoil enter the filter chamber 24 through the cavity 27;

[0057] S3: Filtering gravel: When the filter roller 23 rotates, the topsoil in the filter roller 23 enters the collection chamber 22 through the filter slot 29, and the gravel enters the collection box under the guidance of the spiral blade 31 and the guide platform 32;

[0058] S4: backfilling the topsoil: the driving motor 13 rotates in the reverse direction, the tillage roller 12 rotates, the filter roller 23 remains stationary, the push plate 42 contacts the opening plate 40, the backfilling groove 34 is opened, the filtered topsoil falls out of the collecting chamber 22, the tillage layer is backfilled, and the topsoil is reused;

[0059] S5: Ground leveling: The piston rod of the first oil cylinder 17 contracts, causing the pressure roller 19 to contact the topsoil of the backfilled tillage layer, and presses and levels the topsoil.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for stripping and recovering a cultivated layer, characterized in that: The invention comprises a driving vehicle (1) and a mounting plate (11) arranged on the driving vehicle (1), wherein a tillage roller (12) and a filter roller (23) are rotatably connected to the mounting plate (11), the tillage roller (12) is sleeved on the outside of the filter roller (23), a collecting chamber (22) is provided in the tillage roller (12), a filter chamber (24) is provided in the filter roller (23), a mounting hole (28) penetrating the tillage roller (12) is provided on the wall of the tillage roller (12), a feed hole penetrating the filter roller (23) is provided on the wall of the filter roller (23), a rotary digging knife (26) penetrating the mounting hole (28) is provided on the wall of the filter roller (23), a cavity (27) is provided in the rotary digging knife (26), and the cavity (27) is connected to the filter chamber (24) through the feed hole; and a filter groove (29) is provided on the wall of the filter roller (23). The filter roller (23) at the filter groove (29) is provided with a filter screen (30), the tillage roller (12) is provided with a backfill groove (34), and the tillage roller (12) is provided with a backfill assembly (35) for opening and closing the backfill groove (34); a connecting seat (25) is provided on the outer wall of the filter roller (23), the rotary digging knife (26) is rotatably connected to the connecting seat (25), and a rotating assembly for storing the rotary digging knife (26) is provided between the filter roller (23) and the tillage roller (12); the rotating assembly includes a ratchet (47) and a pawl (46), the pawl (46) is rotatably connected to the inner wall of the tillage roller (12), the ratchet (47) is arranged on the filter roller (23), the ratchet (47) is meshed with the pawl (46), and a driving member is provided on the mounting plate (11), and the driving member is transmission-connected to the tillage roller (12).

2. The device for stripping and recovering the cultivated layer according to claim 1, characterized in that: The backfill assembly (35) comprises a closing plate (36) and an elastic member. A receiving groove (38) for receiving the closing plate (36) is provided in the backfill groove (34). The closing plate (36) is slidably connected in the receiving groove (38). The elastic member is arranged in the receiving groove (38). One end of the elastic member contacts the inner wall of the receiving groove (38), and the other end contacts the side wall of the closing plate (36).

3. The device for stripping and recovering the cultivated layer according to claim 2, characterized in that: A connecting plate (41) is provided on the side wall of the driving vehicle (1) facing the tilling roller (12), and a pushing plate (42) is provided on the connecting plate (41). An opening plate (40) is rotatably connected to the outer wall of the closing plate (36), and the pushing plate (42) is used to push the opening plate (40).

4. The device for stripping and recovering the cultivated layer according to claim 3, characterized in that: A plurality of the backfill grooves (34) are provided, a plurality of the closing plates (36) are provided, and a linkage assembly (43) is provided between the plurality of closing plates (36).

5. The device for stripping and recovering the cultivated layer according to claim 4, characterized in that: The linkage assembly (43) comprises a linkage block (44) and a linkage rod (45); the linkage block (44) is arranged on a side of the closing plate (36) away from the opening plate (40); and the linkage rod (45) is arranged between two adjacent linkage blocks (44).

6. The device for stripping and recovering the cultivated layer according to claim 1, characterized in that: A collection box is provided at one end of the filter roller (23), the filter cavity (24) is connected to the collection box, and spiral blades (31) are provided on the inner wall of the filter roller (23), and the spiral blades (31) extend toward a side close to the collection box.

7. The device for stripping and recovering the cultivated layer according to claim 1, characterized in that: A fixing plate (18) is rotatably connected to the side wall of the driving vehicle (1) away from the mounting plate (11), a pressure roller (19) is rotatably connected to the fixing plate (18), and a first pushing member is rotatably connected to the driving vehicle (1), the first pushing member being rotatably connected to the fixing plate (18).

8. A method for stripping and recovering a cultivated layer, used in conjunction with the device for stripping and recovering a cultivated layer as claimed in any one of claims 1 to 7, characterized in that: The steps include: S1: Topsoil stripping: excavating the soil layer on the surface of the cultivated layer; S2: Topsoil collection: Collect the excavated topsoil and the gravel in the topsoil; S3: Filter gravel: Filter gravel in the topsoil; S4: Topsoil backfill: Return the filtered topsoil and reuse it; S5: Ground leveling: Press and level the recovered tillage layer.

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