Lead-polluted soil remediation device and remediation method

Abstract

The lead-contaminated soil remediation device comprises a circular shell, a soil loosening structure is arranged at the bottom of the circular shell, a plurality of folding plates are hinged to the outer wall of the circular shell, a plurality of outer cylinders are sequentially arranged in the folding plates, a plurality of through grooves are formed in the outer walls of the outer cylinders, adsorption plates are arranged in the through grooves, and the adsorption plates are arranged in the through grooves. A polymer film layer is arranged on the outer wall of the adsorption plate, and a chestnut shell powder filling layer is arranged outside the polymer film layer. When the outer cylinder needs to be taken out from the soil, the position of a conical sleeve is adjusted, the conical sleeve is moved upwards, after the conical sleeve is moved upwards, a pull rod is pulled to move, and an adsorption plate is driven by the pull rod to move towards the interior of the outer cylinder and enter the interior of the outer cylinder; and lead adsorbed on the chestnut shell powder filling layer can be effectively prevented from being rubbed and falling off by soil in the outer barrel moving process, and the lead adsorption efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of soil remediation devices, and in particular to a lead-contaminated soil remediation device and method. Background Technology

[0002] Lead pollution in soil is widespread globally. Lead poses a significant threat to human health, particularly to children's intellectual development, making the remediation of lead-contaminated soil crucial and urgent. Current technologies primarily employ solidification remediation and washing / recycling methods for lead-contaminated soil. Solidification remediation uses compounds such as phosphates to immobilize lead in the soil, reducing its migration and biological absorption or utilization. While this method is relatively low-cost, lead pollution remains, and it does not fundamentally eliminate the contamination. Washing / recycling involves using acids and chelating agents to dissolve and remove lead contamination from the soil before recycling. Although effective, this method is technically complex and costly, limiting its widespread application.

[0003] The prior art can be referenced in Chinese invention patent publication CN117339987A, which specifically describes a lead-contaminated soil remediation device. This device includes an outer cylinder, inside which a telescopic lifting mechanism is installed. A soil loosening device is mounted on the telescopic lifting mechanism. An annular disk is arranged on the outer circumference of the telescopic lifting mechanism, and a rotating disk is coaxially mounted on the annular disk. A lifting structure is installed on the outer side of the rotating disk. Multiple rotating arms are mounted on the outer side of the lifting structure via hinge shafts. An opening and closing mechanism is installed between the rotating arms and the annular disk. Multiple soil treatment units are mounted on the rotating arms. This prior art can perform lead adsorption treatment on a large scale in soil, with a green and environmentally friendly treatment method, low cost, and achieves excellent soil remediation results.

[0004] However, this existing technology has the following shortcomings in actual implementation: when the columnar outer cylinder is removed from the soil, the lead adsorbed on the chestnut shell powder filling layer is easily rubbed off by the soil, affecting the remediation effect. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a lead-contaminated soil remediation device and method to resolve the issues present in the prior art.

[0006] To achieve the above objectives, the present invention provides a lead-contaminated soil remediation device comprising: a circular shell, wherein a soil loosening structure is arranged at the bottom of the circular shell, a plurality of folding plates are hinged to the outer wall of the circular shell, a plurality of outer cylinders are sequentially arranged inside the folding plates, a plurality of through grooves are opened on the outer wall of the outer cylinders, an adsorption plate is arranged inside the through grooves, a polymer film layer is provided on the outer wall of the adsorption plate, and a chestnut shell powder filling layer is provided on the outside of the polymer film layer;

[0007] A conical sleeve is slidably disposed inside the outer cylinder. The outer wall of the conical sleeve is provided with four second sliding grooves. The inner walls on both sides of the second sliding grooves are provided with third sliding grooves. A plug rod is slidably disposed inside the third sliding groove.

[0008] A pull rod is fixed to the inner wall of the adsorption plate, and a connector is provided at one end of the pull rod. The insertion rod is rotatably connected to the connector.

[0009] Furthermore, a connecting block is provided at the top of the outer cylinder, the connecting block is rotatably connected to the folding plate, and multiple connecting blocks are interconnected. A first motor is provided on one side of the folding plate, and the output end of the first motor is connected to one of the connecting blocks.

[0010] Furthermore, a micro motor is installed inside the connecting block, which drives the outer cylinder to rotate. The drill bit is detachably installed on the outer cylinder via threads.

[0011] Furthermore, a shaft is slidably disposed inside the outer cylinder, the top of the shaft is slidably sleeved with the output end of the micro motor, a sleeve is fixedly disposed at the inner top of the outer cylinder, the shaft passes through the sleeve, the inner wall of the sleeve is provided with internal threads, and the outer wall of the shaft is provided with external threads.

[0012] The shaft passes through the tapered sleeve, and a bearing is fitted on the outer wall of the shaft. The inner wall of the tapered sleeve is connected to the bearing.

[0013] Furthermore, a connecting seat is rotatably provided at the inner bottom of the outer cylinder, four reinforcing plates are provided at the top of the connecting seat, and a docking cylinder is provided at the top of the connecting seat, the docking cylinder being connected to the shaft.

[0014] Furthermore, a connecting column is fixedly connected to the bottom of the shaft, and a plurality of second teeth are provided on the bottom outer wall of the connecting column. A docking groove is provided on the top of the docking cylinder, and a plurality of first teeth are provided on the inner wall of the docking groove.

[0015] Furthermore, an arc-shaped groove is provided at the top of the outer cylinder, and the connecting seat is slidably connected to the arc-shaped groove.

[0016] Furthermore, the outer wall of the circular shell is provided with a plurality of hinge seats, the top of the folding plate is provided with a hinge block, the hinge block is rotatably disposed inside the hinge seats, the outer wall of the circular shell is provided with a plurality of first sliding grooves, one end of the hinge block is provided with a linkage rod, and one end of the linkage rod extends into the interior of the circular shell through the first sliding groove;

[0017] The interior of the circular shell has two electric telescopic rods at opposite ends. The output ends of the two electric telescopic rods are connected to a circular ring, and one end of the linkage rod is hinged to the circular ring.

[0018] Furthermore, the soil loosening structure includes a drill rod rotatably mounted at the bottom of the circular shell, and a second motor is disposed inside the circular shell, with the output end of the second motor connected to the drill rod.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. When it is necessary to remove the outer cylinder from the soil, adjust the position of the conical sleeve and move the conical sleeve upward. After the conical sleeve moves upward, pull the lever to move it. The lever will drive the adsorption plate to move into the inner part of the outer cylinder. Entering the inner part of the outer cylinder can effectively prevent the lead adsorbed on the chestnut shell powder filling layer from being rubbed off by the soil during the movement of the outer cylinder, thereby improving the lead adsorption efficiency.

[0021] Second, when the micro motor is working, it first drives the shaft to rotate. Under the action of the sleeve and the internal and external threads, when the shaft rotates clockwise, it will move downward, thereby driving the tapered sleeve to move downward. The tapered sleeve moves downward and pushes the pull rod outward, thereby driving the adsorption plate to move. The adsorption plate moves out of the inner cylinder through the through groove, which facilitates the adsorption of lead in the soil. The bearing is set so that the tapered sleeve does not affect the rotation of the shaft while moving.

[0022] 3. After the shaft moves downwards a certain distance, the connecting post at the bottom of the shaft will be inserted into the docking cylinder, causing the docking cylinder to rotate. The docking cylinder then drives the connecting seat to rotate, which in turn drives the reinforcing plate to move. Under the constraint of the arc-shaped sliding groove, the connecting seat can only rotate a certain angle. It stops moving when the reinforcing plate moves to the inside of the adsorption plate. After the reinforcing plate moves to the inside of the adsorption plate, it can lock the adsorption plate to prevent it from moving back into the outer cylinder. This prevents the pull rod from breaking due to impact from foreign objects during insertion into the soil, thus improving the service life.

[0023] 4. When adjusting the angle of the folding plate, start the electric telescopic rod, which drives the ring to move downward. Then, the downward movement of the ring drives one end of the linkage rod to move downward, while the other end moves upward. This causes the hinge block to rotate, which in turn causes the folding plate to move, thus achieving the effect of adjusting the angle of the folding plate.

[0024] Fifth, the second motor drives the drill rod to rotate, loosening the soil through the drill rod. Then, the folding plate is adjusted and placed on the soil. The outer cylinder is then inserted into the soil, and the lead in the soil is adsorbed through the chestnut shell powder filling layer.

[0025] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the third three-dimensional structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the internal structure of the circular shell in this invention;

[0030] Figure 5 This is a schematic diagram of the internal structure of the folding plate in this invention;

[0031] Figure 6 This is a schematic diagram of the outer cylinder in this invention;

[0032] Figure 7 This is a cross-sectional view of the outer cylinder in this invention;

[0033] Figure 8 This is a schematic diagram of the internal structure of the outer cylinder in this invention;

[0034] Figure 9 This is a schematic diagram of the conical sleeve in this invention;

[0035] Figure 10 This is a schematic diagram of the connecting seat in this invention;

[0036] Figure 11 This is a cross-sectional view of the sleeve in this invention;

[0037] Figure 12 This is a cross-sectional view of the tapered sleeve in this invention;

[0038] Figure 13 This is a schematic diagram of the structure of the second slide groove in this invention;

[0039] Figure 14 This is an appendix to the present invention. Figure 13 Enlarged view of A in the middle;

[0040] Figure 15 This is a schematic diagram of the structure of the docking cylinder in this invention;

[0041] Figure 16 This is a top view of the connecting seat in this invention.

[0042] In the diagram: 1. Circular shell; 2. Folding plate; 3. First motor; 4. Hinge seat; 5. Hinge block; 6. Drill rod; 7. Outer cylinder; 8. Linkage rod; 9. First slide groove; 10. Ring; 11. Electric telescopic rod; 12. Second motor; 13. Connecting block; 14. Drill bit; 15. Through groove; 16. Adsorption plate; 17. Shaft; 18. Reinforcing plate; 19. Sleeve; 20. Conical sleeve; 21. Connecting column; 22. Butt joint cylinder; 23. Second slide groove; 24. Pull rod; 25. Connecting seat; 26. Butt joint groove; 27. External thread; 28. Bearing; 29. ​​Connector; 30. Third slide groove; 31. Insert rod; 32. First tooth; 33. Second tooth; 34. Arc-shaped slide groove. Detailed Implementation

[0043] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings. However, the scope of protection of the present invention is not limited to the following description.

[0044] Reference Figure 1-16 As shown, a lead-contaminated soil remediation device includes: a circular shell 1, a soil loosening structure arranged at the bottom of the circular shell 1, a plurality of folding plates 2 hinged to the outer wall of the circular shell 1, a plurality of outer cylinders 7 arranged sequentially inside the folding plates 2, a plurality of through grooves 15 opened on the outer wall of the outer cylinders 7, an adsorption plate 16 arranged inside the through grooves 15, a polymer film layer arranged on the outer wall of the adsorption plate 16, and a chestnut shell powder filling layer arranged outside the polymer film layer.

[0045] A conical sleeve 20 is slidably arranged inside the outer cylinder 7. Four second sliding grooves 23 are opened on the outer wall of the conical sleeve 20. Third sliding grooves 30 are opened on the inner walls of both sides of the second sliding grooves 23. An insert rod 31 is slidably arranged inside the third sliding groove 30. A pull rod 24 is fixed on the inner side wall of the adsorption plate 16. A connector 29 is provided at one end of the pull rod 24. The insert rod 31 is rotatably connected to the connector 29.

[0046] The soil loosening structure includes a drill rod 6 that is rotatably mounted at the bottom of a circular shell 1. A second motor 12 is installed inside the circular shell 1, and the output end of the second motor 12 is connected to the drill rod 6.

[0047] The present invention provides a technical solution in which, during use, a second motor 12 drives the drill rod 6 to rotate, loosening the soil. Then, the folding plate 2 is adjusted and placed over the soil, allowing the outer cylinder 7 to enter the soil. The chestnut shell powder filling layer adsorbs lead from the soil. When the outer cylinder 7 needs to be removed from the soil, the position of the conical sleeve 20 is adjusted, moving it upwards. Once the conical sleeve 20 is moved upwards, the pull rod 24 is moved, causing the adsorption plate 16 to move into the inner part of the outer cylinder 7. This effectively prevents the lead adsorbed on the chestnut shell powder filling layer from being rubbed off by the soil during the movement of the outer cylinder 7, thus improving the efficiency of lead adsorption.

[0048] Preferably, a connecting block 13 is provided on the top of the outer cylinder 7, the connecting block 13 is rotatably connected to the folding plate 2, multiple connecting blocks 13 are connected to each other, a first motor 3 is provided on one side of the folding plate 2, the output end of the first motor 3 is connected to one of its connecting blocks 13, a micro motor is provided inside the connecting block 13, the micro motor drives the outer cylinder 7 to rotate, and a drill bit 14 is detachably installed on the outer cylinder 7 by means of threads.

[0049] Specifically, the connecting block 13 allows for an adjustable angle of the outer cylinder 7, facilitating insertion into the soil. The first motor 3 drives the connecting block 13 to rotate, thereby adjusting the angle of the outer cylinder 7 for automatic adjustment. A micro motor also drives the outer cylinder 7 to rotate, facilitating insertion into the soil for lead adsorption.

[0050] Preferably, a shaft 17 is slidably disposed inside the outer cylinder 7, the top of the shaft 17 is slidably sleeved with the output end of the micro motor, a sleeve 19 is fixedly disposed on the inner top of the outer cylinder 7, the shaft 17 passes through the sleeve 19, the inner wall of the sleeve 19 is provided with an internal thread, the outer wall of the shaft 17 is provided with an external thread 27, the shaft 17 passes through the tapered sleeve 20, a bearing 28 is sleeved on the outer wall of the shaft 17, and the inner wall of the tapered sleeve 20 is connected to the bearing 28.

[0051] Specifically, when the micro motor is working, it first drives the shaft 17 to rotate. Under the action of the sleeve 19 and the internal and external threads 27, when the shaft 17 rotates clockwise, it will move downward, thereby driving the conical sleeve 20 to move downward. The conical sleeve 20 moves downward and pushes the pull rod 24 outward, thereby driving the adsorption plate 16 to move. The adsorption plate 16 moves out of the inner cylinder 7 through the through groove 15, which facilitates the adsorption of lead in the soil. The bearing 28 ensures that the movement of the conical sleeve 20 will not affect the rotation of the shaft 17.

[0052] Preferably, a connecting seat 25 is rotatably provided at the inner bottom of the outer cylinder 7, four reinforcing plates 18 are provided at the top of the connecting seat 25, a docking cylinder 22 is provided at the top of the connecting seat 25, the docking cylinder 22 is connected to the shaft 17, a connecting column 21 is fixedly connected to the bottom of the shaft 17, a plurality of second teeth 33 are provided on the bottom outer wall of the connecting column 21, a docking groove 26 is provided at the top of the docking cylinder 22, a plurality of first teeth 32 are provided on the inner wall of the docking groove 26, an arc-shaped sliding groove 34 is provided at the top of the outer cylinder 7, and the connecting seat 25 is slidably connected to the arc-shaped sliding groove 34.

[0053] Specifically, when the shaft 17 moves downward by one distance, the connecting post 21 at the bottom of the shaft 17 will be inserted into the inside of the docking cylinder 22. When the connecting post 21 is inserted into the inside of the docking cylinder 22, the conical sleeve 20 has completely pushed the adsorption plate 16 out of the inside of the outer cylinder 7. After the connecting post 21 is inserted into the docking cylinder 22, the first tooth 32 and the second tooth 33 are engaged with each other. Then the shaft 17 will drive the docking cylinder 22 to rotate, which will drive the connecting seat 25 to rotate. The connecting seat 25 will drive the reinforcing plate 18 to move. Under the restriction of the arc-shaped sliding groove 34, the connecting seat 25 can only rotate a certain angle. When the reinforcing plate 18 moves to the inside of the adsorption plate 16, it stops moving and then drives the outer cylinder 7 to rotate as a whole, which is convenient for insertion into the soil. After the reinforcing plate 18 moves to the inside of the adsorption plate 16, it can lock the adsorption plate 16 in place, preventing it from moving back into the outer cylinder 7. This also prevents the pull rod 24 from breaking due to impact from foreign objects during insertion into the soil, thus improving its service life. When the adsorption plate 16 needs to be reset, simply rotate the shaft 17 counterclockwise. When the shaft 17 rotates counterclockwise, it will first drive the reinforcing plate 18 to reset.

[0054] Preferably, the outer wall of the circular shell 1 is provided with a plurality of hinge seats 4, the top of the folding plate 2 is provided with a hinge block 5, the hinge block 5 is rotatably disposed inside the hinge seat 4, the outer wall of the circular shell 1 is provided with a plurality of first sliding grooves 9, one end of the hinge block 5 is provided with a linkage rod 8, and one end of the linkage rod 8 extends into the interior of the circular shell 1 through the first sliding groove 9.

[0055] Two electric telescopic rods 11 are provided at opposite ends inside the circular shell 1. The output ends of the two electric telescopic rods 11 are connected to a circular ring 10. One end of the linkage rod 8 is hinged to the circular ring 10.

[0056] Specifically, when adjusting the angle of the folding plate 2, the electric telescopic rod 11 is activated, which drives the ring 10 to move downward. Then, the downward movement of the ring 10 drives one end of the linkage rod 8 to move downward, while the other end moves upward, thereby driving the hinge block 5 to rotate and causing the folding plate 2 to move, thus achieving the effect of adjusting the angle of the folding plate 2.

[0057] A method for remediating lead-contaminated soil includes the following steps:

[0058] Step 1: Place the circular shell 1 on the soil surface, and drive the drill rod 6 to rotate through the second motor 12 to loosen the soil.

[0059] Step 2: Start the electric telescopic rod 11, which drives the ring 10 to move downward. Then, the downward movement of the ring 10 drives one end of the linkage rod 8 to move downward, while the other end moves upward, thereby driving the hinge block 5 to rotate and causing the folding plate 2 to move, so that the folding plate 2 covers the soil.

[0060] Step 3: The outer cylinder 7 is rotated by a micro motor, allowing it to enter the soil. The chestnut shell powder filling layer then adsorbs the lead in the soil.

[0061] Workflow: The second motor 12 drives the drill rod 6 to rotate, loosening the soil. Then, the folding plate 2 is adjusted and placed on the soil, allowing the outer cylinder 7 to enter the soil. The chestnut shell powder filling layer adsorbs lead from the soil. When the outer cylinder 7 needs to be removed from the soil, the position of the conical sleeve 20 is adjusted, moving it upwards. This upward movement of the conical sleeve 20 moves the pull rod 24, causing the adsorption plate 16 to move into the outer cylinder 7. The connecting block 13 allows for adjustable angle adjustment, facilitating insertion into the soil. The first motor 3 drives the connecting block 13 to rotate, further adjusting the angle of the outer cylinder 7 for automatic adjustment. A micro motor can also rotate the outer cylinder 7, facilitating its insertion into the soil.

[0062] When the micro motor is working, it first drives the shaft 17 to rotate. Under the action of the sleeve 19 and the internal and external threads 27, when the shaft 17 rotates clockwise, it will move downward, thereby driving the conical sleeve 20 to move downward. The conical sleeve 20 moves downward and pushes the pull rod 24 outward, thereby driving the adsorption plate 16 to move. The adsorption plate 16 moves out of the inner cavity of the outer cylinder 7 through the through groove 15, which facilitates the adsorption of lead in the soil. The bearing 28 is set so that the conical sleeve 20 does not affect the rotation of the shaft 17 while it is moving.

[0063] When the shaft 17 moves downwards a certain distance, the connecting post 21 at the bottom of the shaft 17 will be inserted into the interior of the docking cylinder 22. When the connecting post 21 is inserted into the interior of the docking cylinder 22, the conical sleeve 20 has completely pushed the adsorption plate 16 out of the interior of the outer cylinder 7. After the connecting post 21 is inserted into the docking cylinder 22, the first tooth 32 and the second tooth 33 mesh with each other. Then the shaft 17 will drive the docking cylinder 22 to rotate, which in turn drives the connecting seat 25 to rotate. The connecting seat 25 will then drive the reinforcing plate 18 to move. Under the restriction of the arc-shaped sliding groove 34, the connecting seat 25 can only rotate a certain angle. It will stop moving when the reinforcing plate 18 moves to the inside of the adsorption plate 16, and then drive the outer cylinder 7 to rotate as a whole, making it easy to insert into the soil. When the reinforcing plate 18 moves to the inside of the adsorption plate 16, it can lock the adsorption plate 16 to prevent it from moving back into the interior of the outer cylinder 7. This prevents the pull rod 24 from breaking due to impact from foreign objects during insertion into the soil, thus improving the service life.

[0064] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A lead-contaminated soil remediation device, comprising a circular shell (1), characterized in that: The bottom of the circular shell (1) is provided with a soil loosening structure. The outer wall of the circular shell (1) is hinged with multiple folding plates (2). Multiple outer cylinders (7) are arranged in sequence inside the folding plates (2). Multiple through grooves (15) are opened on the outer wall of the outer cylinders (7). An adsorption plate (16) is arranged inside the through grooves (15). A polymer film layer is provided on the outer wall of the adsorption plate (16). A chestnut shell powder filling layer is provided on the outside of the polymer film layer. The outer cylinder (7) is slidably provided with a conical sleeve (20), and the outer wall of the conical sleeve (20) is provided with four second sliding grooves (23). The inner walls on both sides of the second sliding grooves (23) are provided with third sliding grooves (30), and the inner wall of the third sliding groove (30) is slidably provided with a plug rod (31). A pull rod (24) is fixed to the inner wall of the adsorption plate (16), and a connector (29) is provided at one end of the pull rod (24). The insertion rod (31) is rotatably connected to the connector (29).

2. The lead-contaminated soil remediation device according to claim 1, characterized in that: The top of the outer cylinder (7) is provided with a connecting block (13), which is rotatably connected to the folding plate (2). Multiple connecting blocks (13) are connected to each other. A first motor (3) is provided on one side of the folding plate (2), and the output end of the first motor (3) is connected to one of the connecting blocks (13).

3. The lead-contaminated soil remediation device according to claim 2, characterized in that: The connecting block (13) is equipped with a micro motor, which drives the outer cylinder (7) to rotate. The outer cylinder (7) is detachably installed with a drill bit (14) by means of threads.

4. The lead-contaminated soil remediation device according to claim 3, characterized in that: The outer cylinder (7) is slidably provided with a shaft (17), the top of the shaft (17) is slidably sleeved with the output end of the micro motor, and a sleeve (19) is fixedly provided on the inner top of the outer cylinder (7). The shaft (17) passes through the sleeve (19), the inner wall of the sleeve (19) is provided with an internal thread, and the outer wall of the shaft (17) is provided with an external thread (27). The shaft (17) passes through the tapered sleeve (20), and a bearing (28) is fitted on the outer wall of the shaft (17). The inner wall of the tapered sleeve (20) is connected to the bearing (28).

5. The lead-contaminated soil remediation device according to claim 4, characterized in that: The inner bottom of the outer cylinder (7) is rotatably provided with a connecting seat (25), the top of the connecting seat (25) is provided with four reinforcing plates (18), the top of the connecting seat (25) is provided with a docking cylinder (22), and the docking cylinder (22) is connected to the shaft (17).

6. The lead-contaminated soil remediation device according to claim 5, characterized in that: The bottom of the shaft (17) is fixedly connected to a connecting column (21), and the bottom outer wall of the connecting column (21) is provided with a plurality of second teeth (33). The top of the docking cylinder (22) is provided with a docking groove (26), and the inner wall of the docking groove (26) is provided with a plurality of first teeth (32).

7. The lead-contaminated soil remediation device according to claim 5, characterized in that: The top of the outer cylinder (7) is provided with an arc-shaped groove (34), and the connecting seat (25) is slidably connected to the arc-shaped groove (34).

8. The lead-contaminated soil remediation device according to claim 1, characterized in that: The outer wall of the circular shell (1) is provided with a plurality of hinge seats (4), the top of the folding plate (2) is provided with a hinge block (5), the hinge block (5) is rotatably disposed inside the hinge seat (4), the outer wall of the circular shell (1) is provided with a plurality of first sliding grooves (9), one end of the hinge block (5) is provided with a linkage rod (8), one end of the linkage rod (8) extends into the interior of the circular shell (1) through the first sliding groove (9); The circular shell (1) has two electric telescopic rods (11) at opposite ends inside. The output ends of the two electric telescopic rods (11) are connected to a ring (10). One end of the linkage rod (8) is hinged to the ring (10).

9. The lead-contaminated soil remediation device according to claim 1, characterized in that: The loosening structure includes a drill rod (6) rotatably mounted at the bottom of the circular shell (1), and a second motor (12) is installed inside the circular shell (1), with the output end of the second motor (12) connected to the drill rod (6).

10. A soil remediation method, applied to the lead-contaminated soil remediation device according to any one of claims 1 to 9, characterized in that, Includes the following steps: Step 1: Place the circular shell (1) on the soil surface and drive the drill rod (6) to rotate through the second motor (12) to loosen the soil; Step 2: Start the electric telescopic rod (11), drive the ring (10) to move downward, and then drive one end of the linkage rod (8) to move downward and the other end to move upward through the downward movement of the ring (10), thereby driving the hinge block (5) to rotate, driving the folding plate (2) to move, and covering the folding plate (2) on the soil. Step 3: The outer cylinder (7) is rotated by the set micro motor, and then the outer cylinder (7) enters the soil and adsorbs the lead in the soil through the set chestnut shell powder filling layer.

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