Intelligent grassland soil heavy metal pollution remediation device

Abstract

This invention relates to the field of soil treatment technology, and in particular provides an intelligent grassland soil heavy metal pollution remediation device. The device includes a suspension frame with material seats on both sides. Harrow wheels are mounted on both sides of the suspension frame via a drive system. A first stirring rod is installed within each material seat, pointing vertically downwards. A ring of shovel seats is located around the outer periphery of each harrow wheel. A second stirring rod is installed within each shovel seat. When the shovel seat rotates into the material seat, the second stirring rod reaches the bottom of the first stirring rod. Hoppers are installed on the inner sides of the two material seats to ensure sufficient contact between the remediation agent and the pollutants. The soil is turned over by the shovel seats, and the remediation agent is supplied to the shovel seats via the first stirring rod. The second stirring rod then mixes the soil a second time, and the soil is transferred to the hoppers for further tumbling and mixing, completing the entire remediation process in the soil. The symmetrical harrow wheels on both sides simultaneously treat two rows of soil, significantly increasing operational efficiency.

Description

Technical Field

[0001] This invention relates to the field of soil treatment technology, and in particular to an intelligent device for remediating heavy metal pollution in grassland soil. Background Technology

[0002] Heavy metal pollution remediation in grassland soils is a crucial issue in the field of ecological restoration. Currently used remediation methods include chemical leaching, physical soil replacement, and bioremediation; however, these technologies generally suffer from problems such as complex operation, high costs, or lengthy cycles. Regarding mechanized remediation, existing equipment mostly employs tractor-driven spraying devices or simple tillage and mixing equipment. This involves spraying remediation agents (such as a mixture of modified adsorbents, ferric hydroxide, and lime water) onto the soil surface and then using rotary tillage components for shallow mixing. Even with changes in environmental pH, this method can inhibit heavy metal leaching and reduce the risk of secondary pollution.

[0003] Although such equipment can perform basic operations, the contact area between the remediation agent and the soil is limited, and the mixing uniformity is insufficient, making it difficult to ensure the effective fixation or degradation of heavy metal pollutants. In particular, the remediation effect on deep soil is poor, and a single mixing is not enough to allow the remediation agent to fully react with the soil (especially deep compacted soil), resulting in low remediation efficiency. Summary of the Invention

[0004] To address the above problems, the present invention provides the following technical solution:

[0005] An intelligent grassland soil heavy metal pollution remediation device includes a suspension frame. Material seats are located on the left and right sides of the suspension frame. Rake wheels are mounted on the left and right sides of the suspension frame via a drive system. The two rake wheels are located within the two material seats. A first stirring rod is installed within each material seat, pointing vertically downwards. A shovel seat is located around the outer circumference of each rake wheel. A second stirring rod is installed within each shovel seat. When the shovel seat rotates into the material seat, the second stirring rod reaches the bottom side of the first stirring rod. A hopper is installed inside each of the two material seats. The discharge ends of the two hoppers extend obliquely downwards to the central axis of the suspension frame. The inlet ends of the two hoppers communicate with the shovel seats. A drive structure is provided between the inlet end of each hopper and the second stirring rod within the hopper. When the second stirring rod reaches the inlet end of the hopper, it is driven to rotate by the drive structure.

[0006] As a further preferred embodiment, an intelligent control device is also included, wherein a material feeding chamber is provided between the two material seats, and a feeding port is provided on the two material seats. The two ends of the material feeding chamber are provided with feeding pipes connected to the two feeding ports. The intelligent control device includes solenoid valves provided on the two feeding pipes, and also includes an X-ray fluorescence spectrometer and a controller arranged opposite to each other.

[0007] As a further preferred embodiment, the fabric compartment is provided with a bidirectional spiral feed rod, the two ends of which are respectively close to the two feeding pipes.

[0008] As a further preferred embodiment, the middle part of the bidirectional spiral feed rod is connected to the sprocket of the drive system.

[0009] As a further preferred embodiment, the shovel seat is V-shaped, with the open end of the V-shape reaching the periphery of the rake wheel and the closed end of the V-shape reaching the inner periphery of the rake wheel. The shovel seats are interconnected and located on the same circumference. When the shovel seat rotates with the rake wheel to the feed end of the hopper, the inner end of the shovel seat communicates with the feed end of the hopper.

[0010] As a further preferred option, the top ends of the two first stirring rods are engaged with the two ends of the bidirectional spiral feed rod through a gear combination to achieve synchronous transmission.

[0011] As a further preferred embodiment, the feed end of the hopper is provided with an extension that extends into the rake wheel and reaches the inner circumference of the V-shaped closed end of the shovel seat.

[0012] As a further preferred embodiment, the bottom end of the material base is provided with a vertically downward extending discharge pipe, the first stirring rod is connected inside the discharge pipe, a material distribution plate is installed at the bottom end of the first stirring rod, a cross plate is welded on the top surface of the material distribution plate, the cross plate forms four material distribution units on the top surface of the material distribution plate, and the material distribution units face the bottom end of the discharge pipe.

[0013] As a further preferred embodiment, a reinforcing plate is welded to the feed end of the hopper, the drive structure includes a drive wheel mounted on the second stirring rod, and the drive structure also includes a drive surface disposed on the reinforcing plate. The reinforcing plate is arched, and the drive surface is located on the arched surface. When the drive wheel is about to rotate to the feed end of the hopper along with the shovel seat, the drive wheel is pre-rolled onto the drive surface.

[0014] The advantages of this invention compared to the prior art are:

[0015] Harrow wheels are installed on both sides of the suspension, with a circumferential shovel base on each wheel. A second mixing rod is installed within the shovel base. A material seat is located at the rear of the suspension, containing a first mixing rod. Two hoppers are mounted on the suspension, each corresponding to a shovel base discharge direction. A drive structure is positioned between the hoppers and the second mixing rod on the shovel base. The first mixing rod precisely delivers the remediation agent into the shovel base, where it is initially mixed with the tilled soil in real time. When the shovel base rotates to the hopper inlet, the drive structure triggers the second mixing rod to rotate at high speed, forcibly agitating the soil-remediation agent mixture a second time, significantly improving reaction uniformity. After mixing, the soil slides down the hopper to the centerline of the cultivated land, naturally tumbling and achieving a three-stage diffusion and fusion process, ensuring full contact between the remediation agent and pollutants. Through shovel base tilling, remediation agent delivery to the shovel base via the first mixing rod, secondary mixing via the second mixing rod, and then transfer to the hopper for further tumbling and mixing, the entire remediation process is completed in the soil. The symmetrical harrow wheels on both sides simultaneously process two rows of soil, doubling operational efficiency. Attached Figure Description

[0016] Figure 1 A three-dimensional schematic diagram from the traction side view of an intelligent grassland soil heavy metal pollution remediation device provided for an embodiment of the present invention;

[0017] Figure 2 A plan view from the back side of an intelligent grassland soil heavy metal pollution remediation device provided for an embodiment of the present invention;

[0018] Figure 3 A side view of an intelligent grassland soil heavy metal pollution remediation device provided for an embodiment of the present invention;

[0019] Figure 4 An intelligent grassland soil heavy metal pollution remediation device provided for embodiments of the present invention comprises... Figure 1 A 3D schematic diagram taken from a rear-side perspective;

[0020] Figure 5 This is a schematic diagram of the material seat after being cut open in an intelligent grassland soil heavy metal pollution remediation device provided for an embodiment of the present invention. The diagram shows the first stirring rod, the material distribution plate and the cross plate at its bottom end, and the material distribution unit formed by them.

[0021] Figure 6 An intelligent grassland soil heavy metal pollution remediation device provided for embodiments of the present invention comprises... Figure 5 A top view diagram of section A after it has been cut open;

[0022] Figure 7This is a partial schematic diagram of an intelligent grassland soil heavy metal pollution remediation device provided for an embodiment of the present invention. The diagram shows the structure of the first stirring rod, the material distribution plate and the cross plate at its bottom, and the material distribution unit formed by them from a three-dimensional perspective.

[0023] In the diagram: 1. Suspension; 2. Material seat; 3. Rake wheel; 4. First stirring rod; 5. Shovel seat; 6. Second stirring rod; 7. Hopper; 8. Drive structure; 9. Material distribution chamber; 10. Feed port; 11. Feeding pipe; 12. Solenoid valve; 13. Bidirectional spiral feed rod; 14. Extension; 15. Discharge pipe; 16. Distribution plate; 17. Cross plate; 18. Distribution unit; 19. Reinforcing plate; 20. Drive wheel; 21. Drive surface; 22. Gear assembly. Detailed Implementation

[0024] The above and other embodiments and advantages 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.

[0025] In one implementation, such as Figures 1-7 As shown:

[0026] This embodiment provides an intelligent grassland soil heavy metal pollution remediation device, including a suspension 1, with material seats 2 on the left and right sides of the suspension 1. Rake wheels 3 are installed on the left and right sides of the suspension 1 via a drive system. The two rake wheels 3 are located within the two material seats 2, respectively. A first stirring rod 4 is installed within the material seat 2, with the first stirring rod 4 pointing vertically downwards. A ring of shovel seats 5 is provided around the outer periphery of the rake wheel 3. A second stirring rod 6 is installed within each shovel seat 5. When the shovel seat 5 rotates into the material seat 2, the second stirring rod 6 reaches the bottom side of the first stirring rod 4. A hopper 7 is installed on the inner side of the two material seats 2. The discharge ends of the two hoppers 7 extend obliquely downwards to the central axis of the suspension 1. The inlet ends of the two hoppers 7 communicate with the shovel seats 5. A drive structure 8 is provided between the inlet end of the hopper 7 and the second stirring rod 6 within the hopper 7, so that the second stirring rod 6 reaches the inlet end of the hopper 7 and is driven to rotate by the drive structure 8.

[0027] In use, the forward end of suspension 1 is connected to agricultural equipment, which drives suspension 1 forward along the cultivated land. The two side harrow wheels 3 contact the ground and move forward with the vehicle's traction. While moving forward, the shovel seat 5 is used to turn the soil and address soil compaction. At the same time, the first mixing rod 4 discharges the heavy metal remediation agent from the material seat 2. A small portion of the remediation agent falls directly onto the ground and mixes with the turned soil. Simultaneously, when one of the shovel seats 5 rotates to the bottom of the first mixing rod 4, it collects most of the heavy metal remediation agent, mixing it with the soil shoveled by the shovel seat 5. As the rake wheel 3 rotates to the feeding end of the hopper 7, the drive structure 8 triggers the second stirring rod 6 inside the shovel seat 5 to rotate. The second stirring rod 6 mixes the remediation agent that fell into the shovel seat 5 after the first mixing with the soil, and the soil mixed with the remediation agent flows through the inside of the rake wheel 3 to the hopper 7, and then through the hopper 7 to the central axis of the suspension 1. This allows the soil to achieve the first treatment of heavy metals during the tilling operation and the second treatment of heavy metals by shoveling some soil from the tilling and turning it to the other side and bringing it into the central axis. This not only improves the tilling operation rate, but also improves the treatment efficiency of heavy metals.

[0028] In addition, the rake wheels 3 are symmetrically located on both sides of the suspension 1. Similarly, on each side of the suspension 1, there is a set of the above-mentioned dual-stage heavy metal treatment components consisting of a material seat 2, a first stirring rod 4, a second stirring rod 6, and a hopper 7. When the two rake wheels 3 move forward synchronously, the above two technical effects will be produced. Finally, the soil is put into the two hoppers 7 through the shovel seat 5. At the same time, before the soil is put into the two hoppers 7, it is purified by the heavy metal remediation agent provided by the first stirring rod 4 and the second stirring rod 6 on both sides. As the soil slides back into the soil along the hopper 7, a third mixing treatment is achieved, which further improves the treatment efficiency.

[0029] In terms of structural distribution, the first stirring rod 4 is perpendicular to the rotation path of the material seat 2. That is, when the shovel seat 5 rotates to the vertical position of the first stirring rod 4, in addition to quickly picking up the heavy metal remediation agent from the shovel seat 5, it can also ensure that the heavy metal remediation agent is pre-treated evenly by the first stirring rod 4 before being poured onto the soil in the shovel seat 5. This allows the shovel seat 5 to carry the soil to the feeding end of the hopper 7 for secondary mixing by the second stirring rod 6, thus reducing some of the mechanical labor. This also shortens the distance between the first stirring rod 4 and the second stirring rod 6, resulting in a compact structure.

[0030] like Figure 2 , Figure 5 , Figure 6 as well as Figure 7As shown, the bottom end of the material base 2 is provided with a vertically downward extending discharge pipe 15. The first stirring rod 4 is connected inside the discharge pipe 15. The bottom end of the first stirring rod 4 is equipped with a distribution plate 16. A cross plate 17 is welded on the top surface of the distribution plate 16. The cross plate 17 forms four distribution units 18 on the top surface of the distribution plate 16. The distribution units 18 face the bottom end of the discharge pipe 15. The heavy metal remediation agent in the material base 2 flows into the discharge pipe 15 and then falls onto the distribution plate 16 from the bottom end of the discharge pipe 15. After being distributed by the distribution plate 16, it is distributed into the four distribution units 18. As the first stirring rod 4 rotates with the distribution plate 16, the cross plate 17 and the distribution units 18, the heavy metal remediation agent is finally evenly sprinkled into the shovel base 5 by centrifugal force and mixed with the soil shoveled in the shovel base 5 to complete the first stage of mixing.

[0031] like Figure 1 , Figure 4 As shown, the fabric compartment 9 is equipped with a bidirectional spiral feed rod 13, with both ends of the bidirectional spiral feed rod 13 close to the two feeding pipes 11. The middle part of the bidirectional spiral feed rod 13 is connected to the drive system via a sprocket. The drive system refers to the drive shaft usually located at the bottom of the suspension 1, with two rake wheels 3 mounted at both ends of the drive shaft. This is a common existing installation technique for mounting wheels on a vehicle frame, which will not be elaborated upon in this invention. It is particularly important to emphasize that, in addition to mounting the two rake wheels 3, the drive system also transmits power to the bidirectional spiral feed rod 13 when the two rake wheels 3 are in contact with the ground and rolling. This power drives the bidirectional spiral feed rod 13 to rotate. The rotation of the bidirectional spiral feed rod 13 within the fabric compartment 9 allows the heavy metal repair agent to be mixed in advance, providing the prerequisite for the subsequent first and second rapid mixing processes.

[0032] like Figure 1 , Figure 3As shown, the shovel seat 5 is V-shaped, with the open end of the V-shape reaching the outer periphery of the rake wheel 3 and the closed end of the V-shape reaching the inner periphery of the rake wheel 3. The shovel seats 5 are connected to each other and are located on the same circumference. When the shovel seat 5 rotates with the rake wheel 3 to the feeding end of the hopper 7, the inner end of the shovel seat 5 is connected to the feeding end of the hopper 7. When a shovel seat 5 rotates into the soil, it turns over the soil (original ground surface) through the V-shaped opening end, and simultaneously scoops up some soil using the V-shaped opening. The shovel seat 5 then rotates to the vertical bottom side of the first mixing rod 4, and catches the heavy metal remediation agent through the V-shaped opening end, allowing the heavy metal remediation agent to fall into the shovel seat 5 and mix with the soil scooped up inside. When the shovel seat 5 rotates to the feeding end of the hopper 7, the V-shaped closed end (cavity bottom) of the shovel seat 5 is connected to the feeding end of the hopper 7 (connected means that the V-shaped cavity bottom of the shovel seat 5 corresponds exactly to the feeding end of the hopper 7, forming feeding conditions). This allows the soil in the shovel seat 5 and the falling heavy metal remediation agent to flow into the hopper 7 under the action of the second mixing rod 6 driven by the drive structure 8. All shovel seats 5 repeat the above positional changes in sequence, so that the scooped soil and heavy metal remediation agent are mixed and continuously flow into the hopper 7, improving processing efficiency.

[0033] like Figure 1 As shown, in order to improve the strength of the hopper 7, a reinforcing plate 19 is welded between the two sides of its feed end to prevent deformation of the feed end. In addition, the reinforcing plate 19 is also the core component of the drive structure 8 mentioned above, as follows: The drive structure 8 includes a drive wheel 20 mounted on the second stirring rod 6. The drive structure 8 also includes a drive surface 21 set on the reinforcing plate 19. The reinforcing plate 19 is arched, and the drive surface 21 is located on the arched surface. When the drive wheel 20 is about to rotate to the feed end of the hopper 7 with the shovel seat 5, the drive wheel 20 is rolled into the drive surface 21 in advance. When a certain shovel seat 5 rotates to the feeding end of the hopper 7, the drive wheel 20 will roll onto the arched drive surface 21 in advance. The drive surface 21 provides rolling (when the drive wheel 20 is a rubber wheel and the drive surface 21 is a rubber friction surface) or meshing (when the drive wheel 20 is a gear and the drive surface 21 is a tooth surface) force to the drive wheel 20, forcing the drive wheel 20 to drive the second stirring rod 6 to rotate. The second stirring rod 6 not only performs secondary mixing of the soil shoveled in the shovel seat 5 and the heavy metal remediation agent that falls in after being mixed by the first stirring rod 4, but also assists in the effective flow of the soil and heavy metal remediation agent into the hopper 7 after being mixed by the rotation of the second stirring rod 6, thus expanding the functions of the second stirring rod 6 and the reinforcing plate 19.

[0034] Functionally, this intelligent grassland soil heavy metal pollution remediation device also includes an intelligent control device. Firstly, a material distribution chamber 9 is located between two material bases 2, with feeding ports 10 on each base. Feeding pipes 11 connect to the two feeding ports 10 at both ends of the material distribution chamber 9. The intelligent control device includes solenoid valves 12 mounted on the two feeding pipes 11, as well as an X-ray fluorescence spectrometer and controller positioned opposite each other. The X-ray fluorescence spectrometer and controller are mounted on the towing agricultural equipment. When the X-ray fluorescence spectrometer detects heavy metal components in the soil (such as the content of As, Pb, Cd, Cr, Cu, Zn, Hg, etc.), it feeds back the detection signal to the controller. Once the set threshold is reached, the solenoid valve 12 opens, and the material distribution chamber 9 simultaneously adds heavy metal remediation agent to both material bases 2 through the feeding pipes 11. Conversely, if the X-ray fluorescence spectrometer does not detect heavy metal components, the set threshold of the controller is not reached, the solenoid valve 12 closes, and there is no need to add heavy metal remediation agent to the two material bases 2. This intelligent control is achieved based on soil conditions, saving resources.

[0035] The "bidirectional" in bidirectional spiral feed rod 13 refers to the opposite rotation direction of the spiral feed teeth on both sides of the bidirectional spiral feed rod 13, that is, the spiral feed teeth at one end are left-handed and the spiral feed teeth at the other end are right-handed, realizing simultaneous feeding of materials from the same material distribution chamber 9 to two material seats 2, thereby improving the feeding speed. Of course, in order to replace the bidirectional spiral feed rod 13, material seats 2 and material distribution chamber 9 with a screw feeder, the controller can intelligently control whether the screw feeder feeds materials based on the detection results of the X-ray fluorescence spectrometer. However, in this embodiment, the bidirectional spiral feed rod 13 is mechanically driven by the drive system, which can save the screw feeder and reduce costs.

[0036] The feed end of the hopper 7 is provided with an extension 14, which extends into the rake wheel 3 and reaches the inner circumference of the V-shaped closed end of the shovel seat 5. This allows the extension 14 to reach the discharge range of the shovel seat 5 as much as possible without affecting the rake wheel 3. After the shovel seat 5 discharges the material by stirring, the soil can flow into the hopper 7 in a directional manner under the guidance of the extension 14.

[0037] The top ends of the two first stirring rods 4 are meshed with the two ends of the bidirectional spiral feed rod 13 through gear combination 22 to achieve synchronous transmission. When the bidirectional spiral feed rod 13 rotates to distribute materials to the material seats 2 on both sides, it will also drive the first stirring rods 4 in the two material seats 2 to rotate synchronously through the meshing relationship between the gear combination 22. The power of the bidirectional spiral feed rod 13 comes from the drive system of the suspension 1 (such as the sprocket transmission relationship in the figure), and this power source is extended to the first stirring rods 4, saving kinetic energy.

[0038] It should be further explained that the remediation agent used in this invention is a mixture of seaweed residue, biochar, humic acid, and Bacillus. Seaweed residue is rich in amino acids, polysaccharides, auxins, gibberellins, etc., which help improve the soil's water and fertilizer retention capacity and promote vegetation growth. Biochar is made by high-temperature treatment of biomass (such as corn stalks, wheat stalks, soybean stalks, pig manure, cow manure, sheep manure, etc.), and has good adsorption properties, capable of fixing heavy metals in the soil. Humic acid can improve soil structure, increase soil water retention capacity and nutrient supply, and also helps fix heavy metals. Bacillus has an effective viable count ≥200 million / g, which can further passivate heavy metals in the soil through biological action. Therefore, the heavy metal remediation agent is composed of multiple chemical components, thus conforming to the multi-component mixed discharge method of this invention.

[0039] The above orientation references do not represent the specific orientations of each component in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme and to make relative descriptions based on the orientations referenced. In reality, the specific orientations of each component are based on their actual installation and use, as well as the orientation descriptions that are customary to those skilled in the art. This is hereby stated.

[0040] The specific embodiments described above further illustrate the inventive purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, or improvements made by those skilled in the art within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An intelligent grassland soil heavy metal pollution remediation device, characterized in that, Includes a suspension (1), with material seats (2) on the left and right sides of the suspension (1). Rake wheels (3) are mounted on the left and right sides of the suspension (1) via a drive system. The two rake wheels (3) are located within the two material seats (2). A first stirring rod (4) is provided within each material seat (2), with the first stirring rod (4) pointing vertically downwards. A ring of shovel seats (5) is provided on the outer circumference of each rake wheel (3). A second stirring rod (6) is installed within each shovel seat (5). When the shovel seat (5) rotates into the material seat (2), it causes the material to... The second stirring rod (6) reaches the bottom side of the first stirring rod (4). The inner sides of the left and right material seats (2) are equipped with hoppers (7). The discharge ends of the two hoppers (7) extend obliquely downward to the central axis of the suspension (1). The feed ends of the two hoppers (7) are connected to the shovel seat (5). A drive structure (8) is provided between the feed end of the hopper (7) and the second stirring rod (6) inside the hopper (7). When the second stirring rod (6) reaches the feed end of the hopper (7), it is driven to rotate by the drive structure (8). The bottom end of the material base (2) is provided with a vertically downward extending discharge pipe (15). The first stirring rod (4) is connected to the discharge pipe (15). The bottom end of the first stirring rod (4) is equipped with a material distribution plate (16). A cross plate (17) is welded on the top surface of the material distribution plate (16). The cross plate (17) makes the top surface of the material distribution plate (16) form four material distribution units (18). The material distribution units (18) face the bottom end of the discharge pipe (15). A reinforcing plate (19) is welded to the feed end of the hopper (7). The drive structure (8) includes a drive wheel (20) mounted on the second stirring rod (6). The drive structure (8) also includes a drive surface (21) disposed on the reinforcing plate (19). The reinforcing plate (19) is arched. The drive surface (21) is located on the arched surface. When the drive wheel (20) is about to rotate to the feed end of the hopper (7) with the shovel seat (5), the drive wheel (20) is rolled into the drive surface (21) in advance.

2. The intelligent grassland soil heavy metal pollution remediation device according to claim 1, characterized in that, It also includes an intelligent control device, a fabric chamber (9) is provided between the two material seats (2), a feeding port (10) is provided on the two material seats (2), and a feeding pipe (11) is provided at both ends of the fabric chamber (9) connected to the two feeding ports (10). The intelligent control device includes a solenoid valve (12) provided on the two feeding pipes (11), and also includes an X-ray fluorescence spectrometer and a controller arranged opposite to each other.

3. The intelligent grassland soil heavy metal pollution remediation device according to claim 2, characterized in that, The fabric compartment (9) is equipped with a bidirectional spiral feed rod (13), and the two ends of the bidirectional spiral feed rod (13) are close to the two feeding pipes (11).

4. The intelligent grassland soil heavy metal pollution remediation device according to claim 3, characterized in that, The middle part of the bidirectional spiral feed rod (13) is connected to the sprocket of the drive system.

5. The intelligent grassland soil heavy metal pollution remediation device according to claim 4, characterized in that, The shovel seat (5) is V-shaped, with the open end of the V-shape reaching the periphery of the rake wheel (3) and the closed end of the V-shape reaching the inner periphery of the rake wheel (3). The shovel seats (5) are connected to each other and are located on the same circumference. When the shovel seat (5) rotates with the rake wheel (3) to the feed end of the hopper (7), the inner end of the shovel seat (5) is connected to the feed end of the hopper (7).

6. The intelligent grassland soil heavy metal pollution remediation device according to claim 5, characterized in that, The feed end of the hopper (7) is provided with an extension (14), which extends into the rake wheel (3) and reaches the inner circumference of the V-shaped closed end of the shovel seat (5).

7. The intelligent grassland soil heavy metal pollution remediation device according to claim 6, characterized in that, The top ends of the first stirring rod (4) and the two ends of the bidirectional spiral feed rod (13) are engaged by a gear combination (22) to achieve synchronous transmission.

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