Soil heavy metal pollution protection and treatment device

Abstract

The invention discloses a soil heavy metal pollution protection and treatment device which comprises a rack, a soil loosening mechanism used for loosening soil and an ash scattering mechanism used for scattering quick lime into the soil loosening mechanism are arranged on the rack, and the soil loosening mechanism comprises a plurality of loosening cutters arranged in the width direction of the rack at equal intervals; one end of each releasing knife is rotationally connected with the rack, the other end of each releasing knife is connected with the traction mechanism, power provided by the traction mechanism is used for driving the releasing knives to deflect, and the motion states of every two adjacent releasing knives are staggered; the quick lime can be in full contact with deep soil, and harmful microorganisms and worm eggs in the soil can be killed; the soil treated by the soil loosening mechanism destroys rhizomes of weeds and plays a role in loosening the soil, and the problem that deep soil cannot be touched when lime is thrown traditionally is solved.

Description

Technical Field

[0001] The present invention relates to a device for preventing and treating soil heavy metal pollution. Background Art

[0002] With the acceleration of the industrialization process and the expansion of urban scale, soil heavy metal pollution has become an extremely serious environmental protection issue globally; common heavy metal pollutants include Cd²⁺, Pb²⁺, Cu²⁺, etc., which can enter the human body and the ecosystem through food chain enrichment.

[0003] In traditional soil remediation technologies, the treatment of soil cannot reach deep into the soil, and direct spraying will also cause a large amount of chelating agents for remediation to accumulate in low-lying areas, causing secondary damage to the soil. Summary of the Invention

[0004] To solve the deficiencies in the prior art, the purpose of the present invention is to provide a repair and treatment device that can directly act quicklime on deep soil and can be in full contact with the soil. It can cut and loosen the soil and be in full contact with quicklime. When quicklime contacts the soil, it can emit a large amount of heat energy, effectively killing harmful substances such as insect eggs in the soil, and the quicklime adjusts the soil pH value to alkaline, promoting heavy metals to form hydroxide precipitates (such as Fe(OH) 3 , Cd(OH) 2 ), providing a favorable environment for the growth of crops.

[0005] To achieve the above technical purpose, the technical solutions adopted by the present invention are as follows.

[0006] A device for preventing and treating soil heavy metal pollution, which includes a frame. A soil loosening mechanism for loosening the soil and a lime spreading mechanism for spreading quicklime into the soil loosening mechanism are arranged on the frame. The soil loosening mechanism includes a plurality of loosening knives arranged at equal intervals along the width direction of the frame. One end of the loosening knife is rotatably connected to the frame, and the other end is connected to a traction mechanism. The power provided by the traction mechanism is used to drive the loosening knife to deflect, and the motion states of two adjacent loosening knives are arranged in a staggered manner.

[0007] Based on the treatment device provided by the present invention, the collected soil is transmitted from the feeding end of the frame to the soil loosening mechanism. Under the continuous action of the soil loosening mechanism, the soil can be loosened. At this time, the lime spreading mechanism pours quicklime into the soil loosening mechanism, and full mixing of quicklime and the soil can be achieved. The soil treated by the soil loosening mechanism destroys the roots and rhizomes of weeds and plays a role in loosening the soil, solving the problem that traditional lime spreading cannot reach deep soil.

[0008] And based on the technical solution provided by the present invention, quicklime can also be replaced with a chelating agent, which includes EDTA (ethylenediaminetetraacetic acid), citric acid, DTPA (diethylenetriaminepentaacetic acid), NTA (nitrilotriacetic acid), etc. It binds to heavy metal ions (such as Cd²⁺, Pb²⁺, Cu²⁺) through coordination bonds to form stable water-soluble complexes, reducing the toxicity of heavy metals and facilitating migration or extraction; its advantage lies in efficiently chelating multiple heavy metals and improving bioavailability.

[0009] For further improvement and optimization of the above technical solution, the traction mechanism includes a number of traction connecting rods, which are in one-to-one correspondence with the loosening knives. The driving end of the traction connecting rod is hinged with a driving rod, and the other end of the driving rod is hinged to the connecting rod journal of the traction crankshaft. The traction crankshaft is movably installed on the frame. The output end of the traction connecting rod is hinged with a movable block. The movable block is connected to one end of a steel wire, and the other end of the steel wire is connected to the suspended end of the loosening knife; its function is to apply a force to the loosening knife by the traction mechanism and enable the loosening knife to obtain an upward deflection force. And under the action of multiple connecting journals on the traction crankshaft, the motion states between adjacent two loosening knives are staggered from each other, so that during the movement of adjacent two loosening knives, the soil can be cut; and the steel wire connected to the suspended end of the loosening knife can intercept the soil, and during the movement, the soil can also be dynamically cut.

[0010] More specifically, two adjacent connecting rod journals on the traction crankshaft are respectively located at one end in the diameter direction of the traction crankshaft; its function is to, by defining the distribution structure of the connecting rod journals, when the force on the crankshaft is transmitted to the loosening knife, make the motion forms of adjacent two loosening knives in a staggered state, that is, when one deflects downward, the other deflects upward.

[0011] For further improvement and optimization of the above technical solution, the loosening knife includes a dividing shaft rotatably connected to the frame. A blade is sleeved outside the dividing shaft. External splines are provided on the dividing shaft, and internal splines matching the external splines are provided on the blade. A nut is threadedly connected to the suspended end of the dividing shaft. A connecting buckle is slidably sleeved on the dividing shaft between the blade and the nut. The steel wire is connected to the connecting buckle; its function is that the deflection angle of the blade can be adjusted according to the soil conditions. When replacing the blade, the blade is taken out from the dividing shaft, the angle is adjusted and then inserted again, and the connecting buckle and the nut are successively installed, and the nut fixes the connecting buckle and the blade.

[0012] More specifically, cutting edges are provided on both end sides of the blade; its function is that it can be more convenient when adjusting the deflection angle of the blade, and both ends of the blade can cut the soil, improving the efficiency of turning over the soil.

[0013] For further improvement and optimization of the above technical solution, the ash spreading mechanism includes an aggregate rack. An inclined ash discharging slope is arranged on the left side of the aggregate rack, and a feeding notch is arranged on the right side of the aggregate rack. A plurality of fastening plates are hinged on the aggregate rack, and the fastening plates correspond to the steel wires one by one. The fastening plate is L-shaped, and an aggregate cavity for containing quicklime is formed between the fastening plate and the aggregate rack. A convex portion is arranged on the steel wire. When the steel wire moves upward, the fastening plate is lifted by the convex portion, so that quicklime flows from the aggregate cavity and the ash discharging slope to the soil loosening mechanism in sequence. Its function is that under the action of the steel wire, the fastening plate on the ash spreading mechanism can deflect upward, so that the quicklime in the aggregate rack flows outwards from the gap between the fastening plate and the aggregate rack, which can be synchronized with the work of the loosening knife to achieve intermittent supply of quicklime.

[0014] The more optimized part is that the fastening plate includes a connecting surface and a pressing surface. The connecting surface is hinged to the aggregate rack, the pressing surface is perpendicular to the connecting surface, and a weight is arranged on the pressing surface. Its function is that when the upward acting force of the steel wire on the fastening plate is withdrawn, under the action of the weight, the fastening plate can be attached to the surface of the aggregate rack and block the outward flow of quicklime.

[0015] The further improvement is that an avoidance groove for the movement of the steel wire is arranged on the aggregate rack, and a guide groove for the movement of the steel wire is arranged on the fastening plate. The width of the convex portion on the steel wire is greater than the width of the guide groove. Its function is that the steel wire passes through the aggregate rack, and some of the quicklime gathered in the aggregate rack will fall from the avoidance groove above the loosening knife, so waste will not be caused.

[0016] For further improvement and optimization of the above technical solution, a cutting mechanism for cutting the soil is arranged on the frame. The cutting mechanism includes a cutting crankshaft. The connecting rod journal of the cutting crankshaft is hinged to the driving end of the cutting connecting rod. The other end of the cutting connecting rod is connected with a shovel. An activity rod is hinged in the middle of the cutting connecting rod, and the other end of the activity rod is hinged to the frame. Its function is that the cutting mechanism can divide large pieces of soil, and another important function of the cutting mechanism is that after the shovel cuts the soil, the soil is thrown in a parabolic form. This part of the soil will contact the quicklime spread by the ash spreading mechanism, which can not only prevent the quicklime spread by the ash spreading mechanism from gathering in one place, but also make the thrown soil spread evenly. When the soil is processed by the loosening knife at this time, the mixing effect of the soil and quicklime can be significantly improved, and under the interception of the loosening knife, large pieces of soil can be prevented from flying out. The mixture of soil and quicklime after being processed by the loosening knife falls below the loosening knife and is directly discharged.

[0017] More detailed improvements and optimizations are as follows. A material guiding frame is arranged on the frame. The material guiding frame includes an inclined feeding plate, a horizontal plate, and an inclined cutting plate. The cutting mechanism is installed at the upper end of the cutting plate. Its function is that the material guiding frame is used for collecting soil, and the cutting mechanism processes the soil on the cutting plate, which can maximize the role of the cutting mechanism and avoid the collision between the cutting mechanism and the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the structures of the traction mechanism, ash spreading mechanism, and soil loosening mechanism matching with each other.

[0020] Figure 3 It is a schematic diagram of the structures of the cutting plate and the cutting mechanism matching with each other.

[0021] Figure 4 It is a schematic diagram of the structures of the cutting crankshaft, cutting connecting rod, and movable rod matching with each other.

[0022] Figure 5 It is a schematic diagram of the structures of the ash spreading mechanism and the soil loosening mechanism matching with each other.

[0023] Figure 6 It is a schematic diagram of the ash spreading mechanism.

[0024] Figure 7 It is a schematic diagram of the structures of the traction crankshaft, traction connecting rod, and movable block matching with each other.

[0025] Figure 8 It is a schematic diagram of the structures of the dividing shaft, blade, and connecting buckle matching with each other.

[0026] The labels in the figure are: 10. Material guiding frame; 11. Feeding plate; 12. Horizontal plate; 13. Cutting plate; 20. Cutting mechanism; 21. Cutting crankshaft; 22. Cutting connecting rod; 23. Movable rod; 30. Traction mechanism; 31. Traction crankshaft; 32. Traction connecting rod; 33. Movable block; 34. Steel wire; 40. Ash spreading mechanism; 41. Feeding trough opening; 42. Clamping plate; 43. Counterweight; 44. Avoidance groove; 45. Guide shaft a; 46. Guide shaft b; 50. Soil loosening mechanism; 51. Dividing shaft; 52. Blade; 53. Connecting buckle; 54. Nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Such as Figure 1 , 2As shown in the figure, a device for preventing and treating heavy metal pollution in soil is installed on a traction device and uses the power provided by the traction device to drive the device to move in the field. The treatment device provided by the present invention uses a cutting mechanism 20 to cut the excavated soil into pieces. The soil that has been using ammonia nitrogen fertilizer for a long time usually shows hardening phenomena such as caking. After being processed by the cutting mechanism 20, the soil can be broken into small pieces, and then the soil is quickly loosened by a soil loosening mechanism 50. During the segmentation process, quicklime is sprinkled on the soil by a lime spreading mechanism 40 to achieve the purpose of full contact and full mixing between the soil and quicklime. The present invention can also be connected to a vehicle equipped with an unmanned driving system to achieve remote control through an intelligent system.

[0028] As Figure 2 , 3 As shown in the figure, a device for preventing and treating heavy metal pollution in soil includes a frame. A material guiding frame 10 is arranged on the frame. The material guiding frame 10 includes an inclined feeding plate, a horizontal plate, and an inclined cutting plate. A cutting knife (not shown in the figure) is arranged at the feeding port of the feeding plate, and the cutting knife is connected to a hydraulic mechanism (not shown in the figure). When soil remediation and treatment are required, the hydraulic mechanism is used to control the cutting knife to move downward and penetrate into the soil, and then the soil can be fed. This part of the structure is common knowledge in the art and will not be described in detail.

[0029] As Figure 2 , 3 As shown in Figures 4 and 4, a cutting mechanism 20 for cutting soil is arranged on the frame. The cutting mechanism 20 includes a cutting crankshaft 21. The connecting rod journal of the cutting crankshaft 21 is hinged to the driving end of a cutting connecting rod 22. The other end of the cutting connecting rod 22 is connected to a shovel. The middle of the cutting connecting rod 22 is hinged to a movable rod 23. The other end of the movable rod 23 is hinged to the frame. Preferably, the hinged part of the movable rod 23 and the frame is located on the upper side of the frame, so as to avoid contact with the lower soil and reduce the mechanical failure rate at the same time.

[0030] More perfectly, the cutting crankshaft 21 is connected to a plurality of cutting connecting rods 22. The adjacent two connecting rod journals on the cutting crankshaft 21 are arranged in a staggered manner, that is, the adjacent two connecting rod journals are arranged non-concentrically. Preferably, the adjacent two connecting rod journals on the cutting crankshaft 21 are respectively located at one end in the diameter direction of the cutting crankshaft 21. The adjacent two shovels move in a non-synchronous staggered manner. When the soil enters the working range of the shovels, the non-synchronous staggered movement mode of the adjacent two shovels can not only break the soil, but also shovel up some of the chopped soil. Moreover, the force exerted by the shovels on the soil can make the soil obtain an initial moving speed and move in a parabolic shape within the frame.

[0031] More optimally, the cutting mechanism 20 is installed at the upper side of the cutting plate, and the shovel of the cutting mechanism 20 is used to cut the soil in the cutting plate. Since the cutting plate is arranged obliquely, and combined with the movement track of the shovel, the shovel can have a larger space for play in the obliquely arranged cutting plate, and can effectively avoid collision with the inner wall of the frame.

[0032] As Figure 5 shown, a soil loosening mechanism 50 is movably arranged in the frame. The soil loosening mechanism 50 includes a plurality of loosening knives arranged at equal intervals in the width direction of the frame. One end of the loosening knife is rotatably connected to the frame, and the other end is connected to the traction mechanism 30. The power provided by the traction mechanism 30 is used to drive the loosening knife to deflect. Preferably, the movement states of two adjacent loosening knives are arranged staggeredly, that is, when one loosening knife deflects upward, the other loosening knife deflects downward; the soil processed by the cutting mechanism 20 is thrown towards the soil loosening mechanism 50. During the staggered movement of the plurality of loosening knives, the clumped soil will be divided again to achieve the purpose of rapid loosening, so as to increase the contact surface between the soil and quicklime.

[0033] As Figure 5 、 7 shown, the traction mechanism 30 includes a plurality of traction connecting rods 32. The traction connecting rods 32 correspond to the loosening knives one by one. The driving end of the traction connecting rod 32 is hinged with a driving rod, and the other end of the driving rod is hinged to the connecting rod journal of the traction crankshaft 31. The traction crankshaft 31 is movably installed in the frame. The output end of the traction connecting rod 32 is hinged with a movable block 33. The movable block 33 is connected to one end of a steel wire 34, and the other end of the steel wire 34 is connected to the suspended end of the loosening knife.

[0034] Preferably, two adjacent connecting rod journals on the traction crankshaft 31 are arranged staggeredly, that is, two adjacent connecting rod journals are arranged non-concentrically. More optimally, two adjacent connecting rod journals on the traction crankshaft 31 are respectively arranged at one end in the diameter direction of the traction crankshaft 31; the connecting rod journal on the traction crankshaft 31 is connected to the driving rod, thereby realizing the transmission of the acting force on the traction crankshaft to the driving rod, and making two adjacent traction connecting rods 32 move non-synchronously, thereby forming a shearing force between two adjacent loosening knives. Under the action of two adjacent loosening knives, the soil can be split into smaller lumps.

[0035] When the steel wire 34 applies an upward traction force to the loosening knife, it will drive the loosening knife connected thereto to deflect upward. As the traction crankshaft 31 moves, when the steel wire 34 eliminates the traction force on the loosening knife, the soil thrown by the shovel will fall on the loosening knife, thereby generating a downward pressure on the loosening knife, so as to push the loosening knife downward to complete the reset.

[0036] To further improve the soil loosening effect of two adjacent loosening knives, the suspended end of the loosening knife can be connected to a return spring through a traction wire (not shown in the figure). When the loosening knife deflects upward under the action of the steel wire 34, the return spring stores energy. When the acting force of the steel wire 34 on the loosening knife is eliminated, the potential energy released by the return spring is used to drive the loosening knife to deflect downward. In addition, the loosening knife can also be connected with a counterweight load at the suspended end (not shown in the figure), and the gravity of the counterweight load is used to drive the loosening knife to quickly reset.

[0037] During the up and down reciprocating movement of the steel wire 34, the soil can also be segmented. Specifically, the soil treated by the shovel knife moves in a parabolic shape towards the suspended end of the loosening knife. Two adjacent steel wires 34 can intercept large pieces of soil, and the steel wire 34 can cut large pieces of soil during the up and down movement. It should also be noted that after the soil is thrown out by the shovel knife in a parabolic shape, it will contact the quicklime falling down. This can not only prevent the quicklime scattered by the ash spreading mechanism from gathering in one place, but also make the thrown soil spread out. When the loosening knife processes the soil at this time, the mixing effect of the soil and the quicklime is significantly improved. The mixture of the soil and the quicklime treated by the loosening knife falls below the loosening knife and is directly discharged.

[0038] As Figure 8 shown, the loosening knife includes a dividing shaft 51 rotatably connected to the frame. A blade 52 is sleeved outside the dividing shaft 51. External splines are provided on the dividing shaft 51, and internal splines matching the external splines are provided on the blade 52. A nut 54 is threadedly connected to the suspended end of the dividing shaft 51. A connecting buckle 53 is slidably sleeved on the dividing shaft 51 between the blade 52 and the nut 54. The steel wire 34 is connected to the connecting buckle 53. Preferably, cutting edges are provided on both ends of the blade 52. The connecting buckle 53 can rotate around its own axis and freely adjust the angle under the traction of the steel wire 34.

[0039] When segmenting the soil, the deflection angle of the blade 52 can be adjusted according to the degree of soil caking. For example, the blade can be set to deflect 45°. At this time, the blade can not only disturb the soil, but also perform inclined cutting on the soil.

[0040] As Figure 5 、 6As shown in the figure, a lime spreading mechanism 40 is provided on the frame, and the lime spreading mechanism 40 is located at the upper end of the soil loosening mechanism 50. The lime spreading mechanism 40 is used to sprinkle quicklime into the soil loosening mechanism 50. The lime spreading mechanism 40 includes an aggregate rack body. An inclined ash discharging slope is arranged on the left side of the aggregate rack body. A feeding notch 41 is arranged on the right side of the aggregate rack body. External quicklime raw materials are continuously supplied into the feeding notch 41. A plurality of fastening plates 42 are hinged on the aggregate rack body. The fastening plates 42 correspond to the steel wires 34 one by one. The fastening plates 42 are L-shaped, and an aggregate cavity for accommodating quicklime is formed between the fastening plates 42 and the aggregate rack body. A convex portion is arranged on the steel wire 34. During the upward movement of the steel wire 34, the fastening plate 42 is lifted by the convex portion, so that quicklime flows from the aggregate cavity and the ash discharging slope to the soil loosening mechanism 50 in sequence.

[0041] More optimally, the fastening plate 42 includes a connecting surface and a pressing surface. The connecting surface is hinged to the aggregate rack body. The pressing surface is perpendicular to the connecting surface, and a counterweight 43 is arranged on the pressing surface. When the acting force of the convex portion on the steel wire 34 on the fastening plate 42 is eliminated, the pressure provided by the counterweight 43 makes the pressing surface fit with the ash discharging slope again.

[0042] More specifically, refer to the attached Figure 6 figure. An avoidance groove 44 for the movement of the steel wire 34 is arranged on the aggregate rack body. A guide groove for the movement of the steel wire 34 is arranged on the fastening plate 42. The width of the convex portion on the steel wire 34 is greater than the width of the guide groove.

[0043] In order to reduce the direct contact between the steel wire 34 and the wall of the fastening plate 42 during the movement process, which will cause damage to the fastening plate 42 during repeated movement. To solve this problem, guiding shafts b46 and guiding shafts a45 that are parallel to each other are also rotatably arranged on the aggregate rack body. After the steel wire is led out from the guide groove, it is guided by the guiding shafts b46 and guiding shafts a45 in sequence and connected to the movable block 33.

[0044] More optimally, a plurality of sliding sleeves (not shown in the figure) are rotatably sleeved on the guiding shafts b46 and guiding shafts a45. The sliding sleeves are in contact with the steel wire 34 and correspond to each other one by one. During the movement of the steel wire 34, the sliding sleeves on the guiding shafts a45 / guiding shafts b46 will be driven to rotate around their own axes, thereby further reducing the influence of friction on the guiding shafts b46 / guiding shafts a45.

Claims

1. A soil heavy metal pollution protection and treatment device, comprising a frame, on which a soil loosening mechanism (50) for loosening the soil and a lime spreading mechanism (40) for spreading quicklime into the soil loosening mechanism (50) are arranged, characterized in that: The loosening mechanism (50) comprises a plurality of loosening knives arranged at equal intervals along the width direction of the frame, one end of the loosening knife is rotatably connected to the frame, and the other end is connected to the traction mechanism (30), the power provided by the traction mechanism (30) is used to drive the loosening knife to deflect, and the movement states of two adjacent loosening knives are arranged in a staggered manner.

2. A soil heavy metal pollution protection and treatment device according to claim 1, characterized in that: The traction mechanism (30) comprises a plurality of traction links (32), the traction links (32) being in one-to-one correspondence with the loosening knife, a driving end of the traction link (32) being hingedly connected to a driving rod, the other end of the driving rod being hingedly connected to a connecting rod journal of a traction crankshaft (31), the traction crankshaft (31) being movably mounted on a frame, an output end of the traction link (32) being hingedly connected to a movable block (33), the movable block (33) being connected to one end of a steel wire (34), and the other end of the steel wire (34) being connected to a suspended end of the loosening knife.

3. A soil heavy metal pollution protection and treatment device according to claim 2, characterized in that: Two adjacent connecting rod journals on the traction crankshaft (31) are disposed at one end of the traction crankshaft (31) in the diameter direction.

4. A soil heavy metal pollution protection and treatment device according to claim 2, characterized in that: The loosening knife comprises a dividing shaft (51) rotatably connected to a frame, a blade (52) being connected to the outer surface of the dividing shaft (51), an external spline being provided on the dividing shaft (51), an internal spline matching the external spline being provided on the blade (52), a nut (54) being threadedly connected to a suspended end of the dividing shaft (51), a connecting buckle (53) between the blade (52) and the nut (54) being slidably sleeved on the dividing shaft (51), and a steel wire (34) being connected to the connecting buckle (53).

5. A soil heavy metal pollution protection and treatment device according to claim 4, characterized in that: Cutting edges are provided on both end sides of the blade (52).

6. The soil heavy metal pollution protection and treatment device according to claim 2 is characterized in that: The ash spreading mechanism (40) comprises a material collecting frame, a slanted ash discharging slope is arranged on the left side of the material collecting frame, a material feeding slot (41) is arranged on the right side of the material collecting frame, a plurality of snap plates (42) are hingedly connected to the material collecting frame, the snap plates (42) correspond to the steel wires (34) one by one, the snap plates (42) are L-shaped, and a material collecting cavity for accommodating quicklime is formed between the snap plates (42) and the material collecting frame, a raised portion is arranged on the steel wire (34), and when the steel wire (34) moves upward, the snap plates (42) are lifted by the raised portion, so that the quicklime flows from the material collecting cavity and the ash discharging slope to the loosening mechanism (50) in sequence.

7. A soil heavy metal pollution protection and treatment device according to claim 6, characterized in that: The buckle plate (42) comprises a connecting surface and a pressing surface, the connecting surface is hinged to the material collecting frame body, the pressing surface is perpendicular to the connecting surface and a counterweight (43) is arranged on the pressing surface.

8. The soil heavy metal pollution protection and treatment device according to claim 7 is characterized in that: The material collecting frame is provided with an avoidance groove (44) for providing avoidance for the movement of the steel wire (34), and the buckling plate (42) is provided with a guide groove for providing avoidance for the movement of the steel wire (34), and the width of the protrusion on the steel wire (34) is greater than the width of the guide groove.

9. The soil heavy metal pollution protection and treatment device according to claim 7 is characterized in that: A cutting mechanism (20) for cutting soil is arranged on the frame, the cutting mechanism (20) comprising a cutting crankshaft (21) and a cutting connecting rod (22), the connecting rod journal of the cutting crankshaft (21) is hinged to the driving end of the cutting connecting rod (22), the other end of the cutting connecting rod (22) is connected to a shovel blade, a movable rod (23) is hinged in the middle of the cutting connecting rod (22), and the other end of the movable rod (23) is hinged to the frame; The cutting crankshaft (21) is connected to a plurality of cutting connecting rods (22); two adjacent connecting rod journals on the cutting crankshaft (21) are disposed at one end of the cutting crankshaft (21) in the diameter direction.

10. The soil heavy metal pollution protection and treatment device according to claim 8, characterized in that: A material guiding frame (10) is arranged on the frame, and the material guiding frame (10) comprises a horizontal plate, an inclined material feeding plate, and an inclined material cutting plate, and a material cutting mechanism (20) is installed on the upper side of the material cutting plate.

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