Variable cross-section multi-layer mutual shearing contaminated soil medicine treatment device and treatment method thereof

Abstract

The application relates to the technical field of soil treatment, in particular to a variable-section multi-layer mutual-shearing contaminated soil dosing treatment device and a treatment method thereof, which comprises a lifting plate, a support arranged on the lifting plate, a lifting mechanism arranged on the support, a supporting plate connected to the lifting mechanism, a reverse rotating mechanism arranged on the supporting plate, a receiving plate connected to the reverse rotating mechanism, a deflection reset mechanism arranged on the receiving plate, a plurality of second loosening rods in equidistant and symmetrical distribution connected to the deflection reset mechanism, and a spacing regulation assembly arranged on the receiving plate and used for regulating the spacing between the two groups of second loosening rods through the deflection reset mechanism. When the second loosening rods loosen the soil, the deflection angle of the second loosening rods can be self-adaptively regulated through the deflection reset mechanism according to the soil loosening degree, so that the soil repair efficiency and quality are improved.

Description

Technical Field

[0001] This invention relates to the field of soil remediation technology, specifically to a variable cross-section multi-layer shear soil chemical treatment device and its treatment method. Background Technology

[0002] Soil remediation is a crucial step in addressing pollution and restoring the ecological functions of land. Among numerous remediation technologies, adding remediation solutions (such as chemical oxidants, reducing agents, and microbial nutrient solutions) to the soil is a widely used method. Its effectiveness largely depends on whether the remediation solution can achieve sufficient and uniform contact with soil particles.

[0003] Currently, the common practice when implementing this type of remediation technology is to first pre-treat the soil before injecting the remediation solution. Common pre-treatment methods include loosening the soil using specialized drilling equipment. Following this, the remediation solution is introduced into the soil through methods such as surface spraying, trench irrigation, or injection.

[0004] Most existing equipment operates with constant power and a fixed range of action. When encountering hard or severely compacted soil, the equipment is prone to bearing huge loads, leading to a surge in energy consumption or even damage. However, if the equipment continues to operate at the same intensity after the soil has softened, it results in wasted power. Furthermore, pretreatment and remediation fluid injection are often carried out in separate steps, which can cause the remediation fluid to concentrate and flow within the loosened channels, making it difficult to penetrate into the unbroken soil clumps or areas outside the equipment's range of action. Summary of the Invention

[0005] The purpose of this invention is to provide a variable cross-section multi-layer shear soil treatment device and method for treating contaminated soil, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A variable cross-section, multi-layered shear structure for treating contaminated soil with chemical dosing includes:

[0008] A lifting plate and a bracket set on the lifting plate, the bracket being equipped with a lifting mechanism and a support plate connected to the lifting mechanism;

[0009] Also includes:

[0010] A reverse rotation mechanism is provided on the support plate, and a receiving plate is connected to the reverse rotation mechanism;

[0011] A sway reset mechanism is provided on the receiving plate. Multiple second loosening rods are connected to the sway reset mechanism in a symmetrically distributed manner at equal intervals. The second loosening rods can control the movement of the sway reset mechanism according to the change in the resistance of the soil.

[0012] A spacing adjustment component is disposed on the receiving plate and is used to adjust the spacing between the two sets of second loosening rods through the yaw reset mechanism.

[0013] As a further aspect of the present invention: the reverse rotation mechanism includes a second motor disposed on the support plate, a rotating rod rotatably mounted on the support plate and connected to the output shaft of the second motor, a first loosening rod and a drill bit disposed on the rotating rod, and a plurality of discharge holes evenly distributed on the outer circumference of the rotating rod.

[0014] As a further embodiment of the present invention: the reverse rotation mechanism further includes a third motor disposed on the support plate, a transmission rod and a rotating sleeve rotatably mounted on the support plate, the transmission rod being connected to the output shaft of the third motor, the rotating sleeve being sleeved on the rotating rod, and a belt connected to the transmission rod being sleeved on the rotating sleeve.

[0015] As a further embodiment of the present invention: a follower sleeve is rotatably mounted on the rotating rod, a support sleeve is provided on the side wall of the follower sleeve, a support rod is axially slidable inside the support sleeve, and a support ring is provided at the end of the support rod.

[0016] As a further embodiment of the present invention: the sway reset mechanism includes a sliding groove formed on the receiving plate and arranged symmetrically, a sliding block is slidably installed in the sliding groove, a sway rod is rotatably installed on the sliding block, and the sway rod is fixedly connected to the second loosening rod and the support ring;

[0017] It also includes a guide assembly and a guide component disposed on the receiving plate to limit the rotation of the yaw rod.

[0018] As a further embodiment of the present invention: the guide assembly includes a support column disposed on the receiving plate, a fixing plate disposed at the end of the support column, and a connecting plate slidably disposed on the support column along its axial direction.

[0019] As a further embodiment of the present invention: the guiding component includes a first helical groove and a second helical groove formed on the outer circumference of the deflector rod, the deflector rod has a movable sleeve that is fixedly connected to the connecting plate and slides axially, the inner wall of the movable sleeve is provided with a limiting block that slides and engages with the first helical groove and the second helical groove, and a spring is sleeved on the deflector rod, the two ends of the spring abutting against the connecting plate and the fixed plate respectively.

[0020] As a further embodiment of the present invention: the spacing adjustment component includes a cylinder disposed on the receiving plate, the telescopic end of the cylinder is provided with a movable plate, and a connecting rod hinged to the movable plate and hinged to the fixed plate.

[0021] As a further embodiment of the present invention: the lifting plate is provided with a support frame that is slidably connected to the rotating sleeve.

[0022] A method for chemical remediation of contaminated soil with variable cross-section and multi-layer shear structure includes the following steps:

[0023] Step 1: Control the support plate to move towards the ground using the lifting mechanism;

[0024] Step 2: The reverse rotation mechanism operates and drills into the soil to administer the drug. At the same time, the second loosening rod is moved by the receiving plate and the swing reset mechanism to loosen the soil.

[0025] Step 3: The second loosening rod controls the movement of the yaw reset mechanism based on the soil resistance it encounters during movement, so as to adjust the area of ​​action of the second loosening rod on the soil;

[0026] Step 4: Under the action of the spacing adjustment component, the spacing between the two sets of second loosening rods is adjusted by the yaw reset mechanism to gradually increase the range of action of the second loosening rods.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] This invention utilizes the adaptive action of a swaying reset mechanism to automatically sway the second loosening rod according to real-time changes in soil resistance, adjusting its effective contact area with the soil. In the initial stage of high resistance, the force is reduced to protect the equipment; in the later stage when resistance decreases, the contact area is increased to improve efficiency. Subsequently, the effective radius of the second loosening rod is actively expanded through a spacing adjustment component. This collaborative mechanism of first circumferential adaptation and then radial active expansion maximizes the coverage and efficiency of single-point operations.

[0029] The loosening operation and remediation solution injection are carried out simultaneously. The remediation solution seeps out from the core loosening area through a hollow rotating rod and its discharge holes. The loosening range expands from the inside out and from small to large, naturally guiding the remediation solution to first penetrate into the deeper soil layers, and then spread to the periphery along the loosening trajectory. This effectively avoids the accumulation of remediation solution on the surface or the creation of untreated dead zones, ensuring the uniform distribution of the remediation solution in the three-dimensional space of the soil.

[0030] The first and second loosening rods, rotating in opposite directions, exert continuous bidirectional shear force on the soil, effectively breaking up soil compaction and pollutant agglomeration. The second loosening rod's "adaptive first, then expand range" working mode allows the loosening process to break through hard soil layers with low energy consumption, and to efficiently expand the treatment volume after the soil softens, significantly increasing the soil treatment capacity per unit time. Attached Figure Description

[0031] Figure 1This is a schematic diagram of one embodiment of a chemical treatment device for contaminated soil with variable cross-section and multi-layer shear structure.

[0032] Figure 2 This is a schematic diagram of the structure of a variable cross-section, multi-layered, interlocking shear soil treatment device from another angle in one embodiment.

[0033] Figure 3 This is a schematic diagram of the lifting mechanism, support plate, and partially reverse rotation mechanism in one embodiment of a multi-layered shear-type contaminated soil treatment device with variable cross-section.

[0034] Figure 4 This is a schematic diagram showing the connection relationship between the partial reverse rotation mechanism, the sway reset mechanism, and the spacing control component in one embodiment of a variable cross-section multi-layer shear soil treatment device.

[0035] Figure 5 This is a schematic diagram of the oscillation reset mechanism and the spacing control component in one embodiment of a variable cross-section multi-layer shear soil treatment device.

[0036] Figure 6 for Figure 5 A magnified schematic diagram of the structure at point A in the middle.

[0037] Figure 7 This is a schematic diagram of the structure of a partial sway reset mechanism and a spacing control component in one embodiment of a variable cross-section multi-layer shear soil treatment device.

[0038] Figure 8 This is a schematic diagram of the partial oscillation reset mechanism in one embodiment of a variable cross-section multi-layer shear soil treatment device.

[0039] Figure 9 This is an exploded structural diagram of the sway reset mechanism and the receiving plate in one embodiment of a variable cross-section multi-layer shear soil treatment device.

[0040] Figure 10 This is an exploded structural diagram of the second loosening rod of a partially swaying reset mechanism in one embodiment of a variable cross-section multi-layer shear soil treatment device.

[0041] In the diagram: 1. Lifting plate; 2. Bracket; 3. First motor; 4. Lead screw; 5. Threaded sleeve; 6. Guide column; 7. Guide sleeve; 8. Support plate; 9. Second motor; 10. Rotating rod; 1001. First loosening rod; 1002. Drain hole; 11. Third motor; 12. Transmission rod; 13. Belt; 14. Rotating sleeve; 15. Support frame; 16. Drill bit; 17. Receiving plate; 1701. Slide groove ; 18. Sliding block; 19. Bias rod; 1901. Second loosening rod; 1902. First spiral groove; 1903. Second spiral groove; 20. Follower sleeve; 21. Support sleeve; 22. Support rod; 2201. Support ring; 23. Support column; 24. Fixed plate; 25. Movable sleeve; 2501. Limiting block; 26. Connecting plate; 27. Spring; 28. Movable plate; 29. ​​Cylinder; 30. Connecting rod. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0044] Please see Figures 1-10 In this embodiment of the invention, a variable cross-section multi-layer shear soil remediation device includes:

[0045] Lifting plate 1, and bracket 2 set on lifting plate 1, bracket 2 is provided with lifting mechanism, and support plate 8 is connected to lifting mechanism;

[0046] Also includes:

[0047] A reverse rotation mechanism is provided on the support plate 8, and a receiving plate 17 is connected to the reverse rotation mechanism.

[0048] A sway reset mechanism is provided on the receiving plate 17. A plurality of second loosening rods 1901 are connected to the sway reset mechanism in a symmetrically distributed manner at equal intervals. The second loosening rods 1901 can control the movement of the sway reset mechanism according to the change in the resistance of the soil.

[0049] A spacing adjustment component is disposed on the receiving plate 17 and is used to adjust the spacing between the two sets of second loosening rods 1901 by means of the yaw reset mechanism.

[0050] Specifically, during soil remediation, the soil needs to be loosened to ensure that the remediation fluid is evenly distributed within it. To this end, the lifting mechanism moves the support plate 8 towards the ground, causing it to drive a reverse rotation mechanism into the soil and loosen it. Simultaneously, the reverse rotation mechanism moves the receiving plate 17, and the sway reset mechanism controls the second loosening rod 1901 to insert into the soil, further loosening it. When the second loosening rod 1901 acts on the soil, the mechanism adjusts its reverse force according to the soil's loosening state. The sway reset mechanism adjusts the sway angle of the second loosening rod 1901, allowing it to adaptively adjust its force based on the soil's loosening condition. Once the soil in the area is loosened, the spacing adjustment component adjusts the distance between the two sets of second loosening rods 1901 through the sway reset mechanism, gradually increasing the effective area of ​​the second loosening rods 1901 until soil remediation is complete.

[0051] Please see Figures 1-4 The reverse rotation mechanism includes a second motor 9 mounted on the support plate 8. A rotating rod 10 connected to the output shaft of the second motor 9 is rotatably mounted on the support plate 8. A first loosening rod 1001 and a drill bit 16 are provided on the rotating rod 10. A plurality of discharge holes 1002 are formed on the outer circumference of the rotating rod 10 at equal intervals. The reverse rotation mechanism also includes a third motor 11 mounted on the support plate 8. A transmission rod 12 and a rotating sleeve 14 are rotatably mounted on the support plate 8. The transmission rod 12 is connected to the output shaft of the third motor 11. The rotating sleeve 14 is sleeved on the rotating rod 10. A belt 13 connected to the transmission rod 12 is sleeved on the rotating sleeve 14.

[0052] Please see Figures 1-3 The lifting mechanism includes a first motor 3 mounted on a bracket 2, a lead screw 4 rotatably mounted on the bracket 2 and connected to the output shaft of the first motor 3, a threaded sleeve 5 threadedly connected to the lead screw 4, a guide post 6 mounted on the bracket 2, a guide sleeve 7 slidably mounted on the guide post 6, and the guide sleeve 7 and the threaded sleeve 5 fixedly connected to the support plate 8.

[0053] In detail, the rotating rod 10 is hollow and can be filled with soil remediation fluid. In the initial state, the threaded sleeve 5 is located at the end of its stroke away from the lifting plate 1, so that the gap between the support plate 8 and the lifting plate 1 is maximized, so that the drill bit 16 is separated from the soil. When soil remediation is required, the first motor 3 works and drives the lead screw 4 to rotate, thereby driving the threaded sleeve 5 to move. The threaded sleeve 5 will drive the guide sleeve 7 to slide along the axial direction of the guide post 6 through the support plate 8. The guide post 6 and the guide sleeve 7 have a guiding function, which can ensure that the threaded sleeve 5 slides along the axial direction of the lead screw 4 and will not rotate with the lead screw 4. The support plate 8 will also drive the rotating rod 10 to move, so as to control the drill bit 16 to gradually move towards the soil.

[0054] At the same time, the second motor 9 works and drives the first loosening rod 1001 and the drill bit 16 to rotate through the rotating rod 10. When the drill bit 16 comes into contact with the soil, the drill bit 16 will be inserted into the soil. At this time, the lifting mechanism continues to move until the first loosening rod 1001 also enters the soil. Under the action of the rotating rod 10, the soil is loosened by the first loosening rod 1001.

[0055] During this process, the remediation solution can be passed through the rotating rod 10. The remediation solution inside the rotating rod 10 will be discharged into the soil through the discharge hole 1002. With the loosening treatment of the soil by the first loosening rod 1001, it can be ensured that the remediation solution reacts evenly with the soil, thereby achieving soil remediation.

[0056] Please see Figures 4-10, a follower sleeve 20 is rotatably mounted on the rotating rod 10. A support sleeve 21 is provided on the side wall of the follower sleeve 20. A support rod 22 axially slides in the support sleeve 21. A support ring 2201 is provided at the end of the support rod 22. The yaw return mechanism includes symmetrically arranged chutes 1701 formed on the receiving plate 17. A sliding block 18 is slidably mounted in the chute 1701. A yaw rod 19 is rotatably mounted on the sliding block 18. The yaw rod 19 is fixedly connected to the second loose rod 1901 and the support ring 2201. It further includes a guiding component and a guiding assembly provided on the receiving plate 17 for restricting the rotation of the yaw rod 19. The guiding component includes a support column 23 provided on the receiving plate 17. A fixing plate 24 is provided at the end of the support column 23. A connecting plate 26 axially slides on the support column 23. The guiding assembly includes a first spiral groove 1902 and a second spiral groove 1903 formed on the circumferential outer wall of the yaw rod 19. An active sleeve 25 fixedly connected to the connecting plate 26 axially slides on the yaw rod 19. A limiting block 2501 slidably engaged with the first spiral groove 1902 and the second spiral groove 1903 is provided on the inner wall of the active sleeve 25. A spring 27 is sleeved on the yaw rod 19. The two ends of the spring 27 are respectively abutted against the connecting plate 26 and the fixing plate 24.

[0057] Among them, it should be noted that the distribution forms of the first loose rod 1001 and the second loose rod 1901 on both sides of the rotating rod 10 have multiple models, specifically including the following:

[0058] a. The conventional "middle" - shaped type, that is, the form shown in the attached Figure 5 of the specification;

[0059] b. The complex "string" - shaped type, that is, on the basis of the form shown in the attached Figure 5 of the specification, adding a group to form a combined form of two groups;

[0060] c. The upper - placed "T" - shaped type, that is, the form formed by extending the length of the lower part of the rotating rod 10 on the basis of the form shown in the attached Figure 5 of the specification;

[0061] d. The simple "vertical bar" - shaped type, that is, the form only having the rotating rod 10.

[0062] Please refer to Figure 4 , Figure 5 , Figure 7 . The spacing adjustment component includes a cylinder 29 provided on the receiving plate 17. The telescopic end of the cylinder 29 is provided with a movable plate 28. A connecting rod 30 hinged to the movable plate 28 and hinged to the fixing plate 24 is provided. A support frame 15 slidably connected to the rotating sleeve 14 is provided on the lifting plate 1.

[0063] Please see Figure 5 Furthermore, the movable plate 28 is sleeved on the rotating sleeve 14 and can slide along the axial direction of the rotating sleeve 14. In the initial state, under the action of the cylinder 29, the movable plate 28 is controlled to be located at the end of the stroke in the direction towards the support plate 8. The movable plate 28 will control the fixed plate 24 to be located at the end of the stroke in the direction towards the rotating sleeve 14 through the connecting rod 30. In this regard, the distance between the two sliding blocks 18 is the smallest and is located at the end of the stroke on one side of the slide groove 1701.

[0064] Under the action of the sliding block 18, the distance between the two sway bars 19 is minimized, so that the area of ​​action of the second loosening rod 1901 on the soil is minimized. The sway bar 19 will control the support rod 22 to be located at the end of the stroke towards the inside of the support sleeve 21 through the support ring 2201. In this case, the distance between the sway bar 19 and the follower sleeve 20 is minimized. At this time, the first loosening rod 1001 and the second loosening rod 1901 are in a staggered state.

[0065] Please see Figure 5 Meanwhile, the movable sleeve 25 and the connecting plate 26 are located at the end of their stroke towards the receiving plate 17, that is, the distance between the connecting plate 26 and the fixed plate 24 is the largest. The extension of the spring 27 in its natural state is greater than the maximum distance between the connecting plate 26 and the fixed plate 24. Therefore, the spring 27 is in a pre-compressed state and always provides the connecting plate 26 and the movable sleeve 25 with a thrust away from the fixed plate 24. Under the action of the movable sleeve 25, the limiting block 2501 is located at the connection position of the first spiral groove 1902 and the second spiral groove 1903, and the angle of the deflector 19 is locked.

[0066] Please see Figure 3 When soil remediation is required, it is necessary to ensure that the soil is in a loose state so that the remediation liquid can flow smoothly in the soil. At this time, the second motor 9 and the third motor 11 work and drive the rotating rod 10 and the transmission rod 12 to rotate respectively, and the two rotate in opposite directions. The rotating rod 10 is limited to rotating clockwise and the transmission rod 12 to rotating counterclockwise. When the rotating rod 10 rotates, it drives the first loosening rod 1001 to rotate clockwise to loosen the soil. When the transmission rod 12 rotates, it drives the rotating sleeve 14 to rotate counterclockwise through the belt 13, thereby driving the receiving plate 17 to rotate. The receiving plate 17 will drive the sliding block 18 to move through the slide groove 1701, thereby driving the swing rod 19 to move around the rotating sleeve 14. The swing rod 19 will drive the second loosening rod 1901 to move counterclockwise.

[0067] By cooperating with the first loosening rod 1001 and the second loosening rod 1901, the soil can be loosened while shearing forces are applied to the soil in different directions to ensure that the soil is loosened more completely.

[0068] Please see Figure 5 When the second loosening rod 1901 performs the loosening action, the soil is not very loose in the initial stage of loosening. Therefore, the reaction force provided by the soil to the second loosening rod 1901 is relatively large. As the second loosening rod 1901 rotates counterclockwise around the rotating sleeve 14, the second loosening rod 1901, under the action of the soil reaction force, drives the deflector rod 19 to rotate counterclockwise, thereby driving the first spiral groove 1902 and the second spiral groove 1903 to move. At this time, the limiting block 2501 will slide relative to the deflector rod 19 along the first spiral groove 1902 and drive the movable sleeve 25 to move, so that the connecting plate 26 slides along the axial direction of the support column 23 and moves away from the receiving plate 17. The support column 23 and the connecting plate 26 have a guiding function, which can ensure that the movable sleeve 25 slides along the axial direction of the deflector rod 19 and will not rotate with the deflector rod 19. Under the action of the connecting plate 26, the spring 27 is compressed.

[0069] As the second loosening rod 1901 oscillates, the contact area between the second loosening rod 1901 and the soil decreases. This allows the force and contact area of ​​the second loosening rod 1901 to be adaptively adjusted according to the loosening of the soil. As the loosening continues, the first loosening rod 1001 and the second loosening rod 1901 continuously apply bidirectional shear force to the soil in opposite rotations. The soil structure gradually becomes loose, and its density and resistance are significantly reduced. At the same time, the soil resistance is further reduced under the lubrication of the remediation fluid.

[0070] When the soil resistance decreases to a certain extent, the reset energy stored in the compressed spring 27 begins to be released, pushing the connecting plate 26 and the movable sleeve 25 to move smoothly along the axis of the support column 23 toward the receiving plate 17. The limiting block 2501 on the inner wall of the movable sleeve 25 then slides back along the first spiral groove 1902 and finally returns to the position where the first spiral groove 1902 and the second spiral groove 1903 are connected, and locks the angle of the deflector rod 19 again. During this process, the deflector rod 19 is driven to rotate clockwise, driving the second loosening rod 1901 on it to reset synchronously. This rotational movement gradually increases the effective contact area between the second loosening rod 1901 and the soil, thereby automatically improving the efficiency and range of the loosening operation when the soil resistance decreases.

[0071] When the second loosening rod 1901 returns to its initial yaw angle, it means that the second loosening rod 1901 can be controlled to move radially along the slide groove 1701 to increase the range of action of the second loosening rod 1901. To this end, under the action of the cylinder 29, the movable plate 28 is driven to move along the axis of the rotating sleeve 14 toward the direction closer to the receiving plate 17. The movable plate 28 will push the fixed plates 24 on both sides to move away from each other through the connecting rod 30, so that the sliding block 18 slides radially along the slide groove 1701. At this time, the distance between the two yaw rods 19 will increase, and the range of action of the second loosening rod 1901 fixed on it will be further expanded.

[0072] During this process, the rotating sleeve 14 continuously drives the receiving plate 17 and the entire sway reset mechanism to rotate counterclockwise. The second loosening rod 1901, which expands the range of action, works in conjunction with the first loosening rod 1001, which rotates continuously clockwise, to loosen the initially loosened soil at a deeper level and over a wider area. At the same time, the remediation fluid continuously seeps out evenly through the hollow rotating rod 10 and the discharge hole 1002 on its circumferential wall. As the loosening range expands, it spreads to a wider soil area, ensuring sufficient contact and uniform mixing between the remediation medium and soil particles. The above steps are repeated until the area of ​​action of the second loosening rod 1901 on the soil reaches its maximum. At this point, it means that the soil remediation in that area is complete.

[0073] A method for chemical remediation of contaminated soil with variable cross-section and multi-layer shear structure includes the following steps:

[0074] Step 1: Control the support plate 8 to move towards the ground using the lifting mechanism;

[0075] Step 2: The reverse rotation mechanism operates and drills into the soil to administer the drug. At the same time, the second loosening rod 19 is moved by the receiving plate 17 and the swing reset mechanism to loosen the soil.

[0076] Step 3: The second loosening rod 19 controls the movement of the yaw reset mechanism according to the soil resistance encountered during movement, so as to adjust the action area of ​​the second loosening rod 19 on the soil.

[0077] Step 4: Under the action of the spacing adjustment component, the spacing between the two sets of second loosening rods 19 is adjusted by the yaw reset mechanism to gradually increase the range of action of the second loosening rods 19.

[0078] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0079] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A variable cross-section, multi-layered shear structure for treating contaminated soil with chemical dosing, comprising: A lifting plate and a bracket set on the lifting plate, the bracket being equipped with a lifting mechanism and a support plate connected to the lifting mechanism; Its characteristic is that it further includes: A reverse rotation mechanism is provided on the support plate, and a receiving plate is connected to the reverse rotation mechanism; A sway reset mechanism is provided on the receiving plate. Multiple second loosening rods are connected to the sway reset mechanism in a symmetrically distributed manner at equal intervals. The second loosening rods can control the movement of the sway reset mechanism according to the change in the resistance of the soil. A spacing adjustment component is disposed on the receiving plate and is used to adjust the spacing between the two sets of the second loosening rods through the swing reset mechanism; The reverse rotation mechanism includes a second motor mounted on the support plate, a rotating rod rotatably mounted on the support plate and connected to the output shaft of the second motor, a first loosening rod and a drill bit mounted on the rotating rod, and a plurality of discharge holes evenly distributed on the outer circumference of the rotating rod. The reverse rotation mechanism also includes a third motor mounted on the support plate. A transmission rod and a rotating sleeve are rotatably mounted on the support plate. The transmission rod is connected to the output shaft of the third motor. The rotating sleeve is sleeved on the rotating rod. A belt connected to the transmission rod is sleeved on the rotating sleeve. A follower sleeve is rotatably mounted on the rotating rod. A support sleeve is provided on the side wall of the follower sleeve. A support rod slides axially inside the support sleeve. A support ring is provided at the end of the support rod. The sway reset mechanism includes symmetrically arranged sliding grooves formed on the receiving plate, a sliding block slidably installed in the sliding groove, a sway rod rotatably installed on the sliding block, and the sway rod being fixedly connected to the second loosening rod and the support ring; It also includes a guide assembly and a guide component disposed on the receiving plate for limiting the rotation of the yaw rod; The guide assembly includes a support column disposed on the receiving plate, a fixing plate disposed at the end of the support column, and a connecting plate slidably disposed on the support column axially. The guiding component includes a first helical groove and a second helical groove formed on the outer circumference of the deflector rod. The deflector rod has a movable sleeve that is fixedly connected to the connecting plate and slides axially. The inner wall of the movable sleeve is provided with a limiting block that slides and engages with the first helical groove and the second helical groove. A spring is sleeved on the deflector rod, and the two ends of the spring abut against the connecting plate and the fixed plate, respectively. The spacing adjustment component includes a cylinder mounted on the receiving plate, a movable plate at the telescopic end of the cylinder, and a connecting rod hinged to the movable plate and hinged to the fixed plate.

2. The variable cross-section multi-layer shear system for treating contaminated soil by chemical dosing as described in claim 1, characterized in that, The lifting plate is provided with a support frame that is slidably connected to the rotating sleeve.

3. A method for chemical treatment of contaminated soil using a variable cross-section multi-layer shear structure, employing the variable cross-section multi-layer shear structure contaminated soil chemical treatment device as described in any one of claims 1-2, characterized in that... Includes the following steps: Step 1: Control the support plate to move towards the ground using the lifting mechanism; Step 2: The reverse rotation mechanism operates and drills into the soil to administer the drug. At the same time, the second loosening rod is moved by the receiving plate and the swing reset mechanism to loosen the soil. Step 3: The second loosening rod controls the movement of the yaw reset mechanism based on the soil resistance it encounters during movement, so as to adjust the area of ​​action of the second loosening rod on the soil; Step 4: Under the action of the spacing adjustment component, the spacing between the two sets of second loosening rods is adjusted by the yaw reset mechanism to gradually increase the range of action of the second loosening rods.

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