A soil ecological remediation device for heavy metal pollution

Abstract

This invention belongs to the field of soil remediation technology, specifically a soil ecological remediation device for heavy metal pollution. It includes a base plate and a mixing and conveying integrated component, which is fixedly installed on the base plate for mixing and conveying the remediation agent. The mixing and conveying integrated component includes a storage tank. Inside the storage tank, a conveying component transports the remediation agent out of the tank for dispersion. A spraying component on the top of the storage tank sprays the remediation agent conveyed by the conveying component outwards. Through the cooperation of a deep soil injection component and a mobile operation system, deep and precise injection of the remediation agent is achieved. A geared motor drives the control tube to rotate, and together with an excavating pipe, an injection channel is formed in the soil. The remediation agent is directly injected below the topsoil layer through the excavated pipe, solving the technical problem that existing surface spraying equipment cannot reach the core pollution area, significantly improving the remediation effect of deeply polluted soil.

Description

Technical Field

[0001] This invention relates to the field of soil remediation technology, specifically to an ecological remediation device for soil contaminated with heavy metals. Background Technology

[0002] Currently, the remediation of heavy metal-contaminated soil has become a major issue in the field of environmental protection. Industrial emissions, mining, and agricultural activities have led to excessive levels of heavy metals such as cadmium, lead, chromium, and mercury in the soil. These pollutants accumulate through the food chain, seriously threatening ecological security and human health. Existing remediation technologies mainly include physical, chemical, and biological methods. Among them, in-situ remediation technologies such as chemical leaching, solidification and stabilization, and phytoremediation are widely used due to their relatively low cost and ease of operation. However, in practical applications, these technologies still face bottlenecks such as the difficulty of remediation agents effectively reaching the core pollution area, low remediation efficiency, and the risk of secondary pollution.

[0003] Existing soil ecological remediation equipment mostly uses surface spraying or targeted injection methods for soil remediation. For example, Chinese Utility Model Patent No. CN217070158U discloses a soil ecological remediation device for heavy metal pollution, relating to the technical field of soil remediation devices. It includes a base, with a water tank for storing remediation agents fixed to the top of the base. A water pump is installed on the top of the base, and a nozzle is connected to the water pump via a rubber hose. A mounting frame is fixed to the side of the base away from the water tank, and a sliding seat is slidably mounted on the mounting frame. The mounting frame has an L-shaped structure, and a first electric telescopic rod is fixedly mounted at the bottom of the mounting frame. The telescopic end of the first electric telescopic rod is fixedly connected to the bottom of the sliding seat. The rubber hose is mounted on the sliding seat via a clamp. An adjustable reduction motor is fixedly mounted on one side of the sliding seat. This utility model solves the technical problem of the limited spray range of the remediation agent caused by the single adjustment method in existing soil ecological remediation devices, and features a wide spray range for the remediation agent.

[0004] While the aforementioned technical solutions achieve large-area spraying through automatic reciprocating feeding and dual-dimensional electric adjustable nozzles, resulting in uniform surface coverage of the remediation agent, the agent can only act on the soil surface. It cannot simultaneously inject the agent into deeper layers, such as below the topsoil, making it difficult to effectively remediate deeply polluted areas. Furthermore, the equipment requires stationary operation, and the nozzle adjustment range is limited. It cannot rotate and change direction in real-time according to the direction of travel to achieve spraying at different angles, nor can it dynamically adjust the spraying range based on the equipment's trajectory, leading to low operational efficiency and limited coverage. To address these technical shortcomings, a solution is proposed. Summary of the Invention

[0005] To address the above problems, the present invention provides the following technical solution: An ecological remediation device for heavy metal contaminated soil includes a base plate and further includes... A mixing and conveying integrated assembly is fixedly installed on the base plate and is used to mix and convey the repair agent. The mixing and conveying integrated assembly includes a liquid storage tank. Inside the liquid storage tank, a conveying component transports the repair agent from inside the liquid storage tank out of the liquid storage tank for dispersion. The top of the liquid storage tank uses a spraying component to spray the repair agent transported by the conveying component to the surrounding area. The top of the liquid storage tank uses a driving component to drive the conveying component and the spraying component. A deep soil injection assembly, which is located at the bottom of the base plate, is used to spray the remediation agent into the deep soil. The deep soil injection assembly includes a delivery pipe, which is located at the bottom of a base plate. A reduction motor is fixedly installed on the base plate, and the output end of the reduction motor is connected to a control pipe. The control pipe is connected to the delivery pipe through a rotary joint. The bottom of the base plate is excavated by an integrated excavation and liquid delivery component to excavate the soil that has been traversed and then inject the remediation agent into it.

[0006] Furthermore, the conveying component includes a conveying cylinder connected inside the storage tank. A fixed pipe is rotatably connected inside the conveying cylinder. Conveying blades that contact the inner wall of the conveying cylinder are connected to the fixed pipe. The repair agent conveyed by the conveying blades is pressurized and injected into the fixed pipe through a port for conveying. A stirring component on the fixed pipe stirs the repair agent inside the storage tank while conveying the repair agent, making it uniformly mixed. A diversion and guiding component on the fixed pipe conveys the repair agent to the conveying pipe.

[0007] Furthermore, the stirring component includes a stirring support plate connected to a fixed pipe, and a stirring plate is connected to the stirring support plate for stirring and mixing the repair agent inside the storage tank.

[0008] Furthermore, the diversion and guiding component includes a positioning ring, which is sleeved on the outside of the fixed tube. A fixed plate is sleeved on the fixed tube, and the outside of the fixed plate is fixed to the inner wall of the storage tank. The repair agent is continuously delivered from the outside of the fixed tube to the inside of the positioning ring through the liquid outlet. A guide pipe is connected to the positioning ring, and an installation pipe is connected to the guide pipe through an electrically controlled valve. The bottom end of the installation pipe is connected to the top end of the control pipe.

[0009] Furthermore, the spraying component includes a square-round pipe, which is connected to the top of a fixed pipe via a rotary joint. The bottom of the square-round pipe is connected to a spray box, and multiple nozzles are connected to the spray box.

[0010] Furthermore, the driving component includes a drive motor, which is fixedly mounted on the liquid storage tank via a metal bracket. A drive gear is connected to the drive motor, and a gear of the same shape as the drive gear meshes with the fixed tube. The rotational power of the drive gear drives the fixed tube to rotate. A rotary adjustment gear that meshes with the drive gear is slidably connected to the square-round tube. A support half-ring is connected to the liquid storage tank, and a support plate is connected to the support half-ring. The support plate is sleeved on the square-round tube, and an electromagnetic ring is connected to the bottom of the support plate. A friction stabilizing plate is connected to the support half-ring, and the friction stabilizing plate is sleeved on the bottom of the surface of the square-round tube and in frictional contact with it.

[0011] Furthermore, the excavation fluid delivery unit includes an excavation tube connected to a control tube, a sealing block connected to the excavation tube, the sealing block being slidably connected inside the excavation tube, a connecting pipe connected to the excavation tube, a spring being installed inside the connecting pipe, the bottom of the spring contacting the top of the sealing block, a contact block being connected to the bottom of the sealing block, and the contact block being slidably connected inside the excavation tube.

[0012] Furthermore, the soil to be injected by the deep soil injection component is plowed on the base plate by the plowing component to loosen the soil and facilitate the injection of the remediation agent. The plowing component includes a movable plate, which is set on the base plate. A limit frame is set on the movable plate and connected to the base plate. A screw is threadedly connected to the movable plate. The top of the screw is movably connected to the inside of the limit frame, and the bottom of the screw is movably connected to the base plate. A plowing blade is fixedly installed on the right side of the movable plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the deep soil injection component is combined with the walking operation to achieve deep and precise injection of the remediation agent. The geared motor drives the control tube to rotate, and together with the excavation tube, an injection channel is formed in the soil. The remediation agent is directly injected into the soil below the topsoil layer through the excavation tube, which solves the technical problem that the remediation agent of the existing surface spraying equipment is difficult to reach the core pollution area, and significantly improves the remediation effect of deep polluted soil. 2. In this invention, the coordinated operation of the mixing and conveying integrated component, the spraying component, and the deep soil injection component achieves a dual remediation mode of surface spraying and deep injection. During the movement of the equipment, the spraying component can rotate 360 ​​degrees through the rotating adjustment gear to spray evenly on the surface. At the same time, the deep soil injection component performs deep injection simultaneously, forming a three-dimensional remediation system of surface barrier and deep remediation. This not only prevents the loss of surface remediation agent but also ensures the effective treatment of deep pollution and avoids the risk of secondary pollution. Attached Figure Description

[0014] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings; Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a three-dimensional schematic diagram of the deep soil injection component in this invention; Figure 3 This is a three-dimensional schematic diagram of the plowing component in this invention; Figure 4 This is an exploded three-dimensional schematic diagram of the integrated mixing and conveying component in this invention; Figure 5 This is a three-dimensional cross-sectional schematic diagram of the integrated mixing and conveying component in this invention; Figure 6 This is a three-dimensional cross-sectional schematic diagram of the integrated excavation and liquid delivery component in this invention.

[0015] Reference numerals: 1. Base plate; 2. Mixing and conveying integrated assembly; 21. Liquid storage tank; 22. Conveying component; 221. Conveying cylinder; 222. Fixing pipe; 223. Conveying blades; 224. Agitator; 2241. Agitator support plate; 2242. Agitator plate; 225. Diverting and guiding component; 2251. Positioning ring; 2252. Fixing plate; 2253. Guide pipe; 2254. Mounting pipe; 23. Spraying component; 231. Square and round pipe; 232. Spray box; 233. Nozzle; 24. Driving component; 241. Drive 1. Motor; 242. Drive gear; 243. Rotary adjustment gear; 244. Support half ring; 245. Support plate; 246. Electromagnetic ring; 247. Friction stabilizing plate; 3. Deep soil injection assembly; 31. Delivery pipe; 32. Gear motor; 33. Control pipe; 34. Excavation and fluid delivery integrated unit; 341. Excavation irregular pipe; 342. Sealing block; 343. Connecting pipe; 344. Spring; 345. Contact block; 4. Plowing assembly; 41. Moving plate; 42. Limiting frame; 43. Screw; 44. Plowing blade. Detailed Implementation

[0016] 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.

[0017] like Figures 1 to 6 As shown, the present invention provides a soil ecological remediation device for heavy metal pollution, including a base plate 1, and further comprising... The mixing and conveying integrated component 2 is fixedly installed on the base plate 1 and is used to mix and convey the repair agent. The mixing and conveying integrated component 2 includes a liquid storage tank 21. The repair agent inside the liquid storage tank 21 is conveyed out of the liquid storage tank 21 and dispersed through a conveying component 22. The top of the liquid storage tank 21 is sprayed around by a spraying component 23. The top of the liquid storage tank 21 is driven by a driving component 24 to drive the conveying component 22 and the spraying component 23. Deep soil injection component 3 is set at the bottom of base plate 1 and is used to spray the remediation agent into the deep soil. The deep soil injection component 3 includes a delivery pipe 31, which is located at the bottom of the base plate 1. A reduction motor 32 is fixedly installed on the base plate 1. The output end of the reduction motor 32 is connected to a control pipe 33. The control pipe 33 is connected to the delivery pipe 31 through a rotary joint. The bottom of the base plate 1 is excavated by the excavation and liquid delivery integrated component 34, and the repair agent is injected into it.

[0018] Specifically, through the integrated design of the mixing and conveying component 2, the deep soil injection component 3, and the walking system, the coordinated operation of mixing, conveying, and deep injection of the remediation agent is realized. The base plate 1 serves as a supporting platform, organically integrating various functional components to form a complete remediation system. Four tires are also movably connected to the bottom of the base plate 1, allowing the base plate 1 to move in the soil. Moreover, the two tires on the front side of the bottom of the base plate 1 can move on the soil via a motor. The power source is a mobile battery on the base plate 1. The walking system enables the equipment to operate continuously and can move autonomously within the contaminated site without the need for frequent manual movement, greatly improving the continuity and efficiency of the remediation operation. The mobile battery power supply ensures the independent operation capability of the equipment, making it suitable for contaminated sites in remote areas or where electricity is inconvenient.

[0019] like Figures 1 to 5 As shown, the conveying component 22 includes a conveying cylinder 221, which is connected inside the liquid storage tank 21. A fixed pipe 222 is rotatably connected inside the conveying cylinder 221. A conveying blade 223 is connected to the fixed pipe 222 and contacts the inner wall of the conveying cylinder 221. The repair agent conveyed by the conveying blade 223 is pressurized and injected into the fixed pipe 222 through the port. The repair agent inside the liquid storage tank 21 is stirred by the stirring component 224 on the fixed pipe 222 while conveying the repair agent to make it uniformly mixed. The repair agent is conveyed to the conveying pipe 31 by the diversion and guiding component 225 on the fixed pipe 222.

[0020] Specifically, the fixed tube 222 is driven by the drive motor 241 and the drive gear 242, which drives the conveying blades 223 to rotate in the conveying cylinder 221. This allows the repair agent entering from multiple ports on the outside of the conveying cylinder 221 to be continuously conveyed to the inside of the fixed tube 222 by the conveying blades 223. The conveying component 22 adopts the principle of spiral conveying. The centrifugal force generated by the rotation of the conveying blades 223 draws the repair agent from the inside of the storage tank 21 into the conveying cylinder 221. Furthermore, the unique guiding structure of the storage tank 21 can continuously guide the repair agent into it and into the fixed tube 222 through the ports, forming a continuous and stable repair agent delivery flow. This design not only realizes the continuous delivery of the repair agent, but also generates a certain pressure on the repair agent through the squeezing action during the delivery process, providing the necessary delivery pressure for subsequent deep injection. At the same time, the conveying component 22 and the stirring component 224 share the same fixed tube 222 as the drive shaft, realizing the intensive use of the power source and reducing the energy consumption and structural complexity of the equipment.

[0021] like Figures 4 to 5 As shown, the stirring component 224 includes a stirring support plate 2241, which is connected to the fixed pipe 222. A stirring plate 2242 is connected to the stirring support plate 2241 for stirring and mixing the repair agent inside the storage tank 21.

[0022] Specifically, the stirring support plate 2241, driven by the rotation of the fixed pipe 222, stirs the repair agent inside the storage tank 21. Multiple inlets on the storage tank 21 allow for the addition of different additives. The rotational force of the repair agent transported by the fixed pipe 222 continuously and effectively mixes the repair agent and additives inside the storage tank 21. The stirring component 224 and the conveying component 22 are coaxially linked. While transporting the repair agent, the stirring plate 2242 continuously stirs the repair agent inside the storage tank 21, preventing sedimentation, stratification, or clumping, and ensuring the uniformity and stability of the repair agent concentration. Multiple inlets on the storage tank 21 allow for the addition of different chemical agents, microbial agents, or nutrient solutions according to repair needs. The continuous stirring action of the stirring plate 2242 enables rapid and uniform mixing of the additives and repair agent, improving the reactivity and repair effect of the repair agent. This integrated design of conveying and stirring simplifies the structure and ensures the uniformity of the repair agent during transport, providing quality assurance for subsequent precise spraying and deep injection.

[0023] like Figures 4 to 5As shown, the diversion and conveying component 225 includes a positioning ring 2251, which is sleeved on the outside of the fixed tube 222. A fixed plate 2252 is sleeved on the fixed tube 222. The outside of the fixed plate 2252 is fixed to the inner wall of the liquid storage tank 21. The repair agent is continuously conveyed from the outside of the fixed tube 222 to the inside of the positioning ring 2251 through the liquid outlet. A guide tube 2253 is connected to the positioning ring 2251. An installation tube 2254 is connected to the guide tube 2253 through an electric control valve. The bottom end of the installation tube 2254 is connected to the top end of the control tube 33.

[0024] Specifically, the diversion and guiding component 225 diverts the remediation agent transported in the fixed pipe 222 to the delivery pipe 31 and control pipe 33, and then injects it into the deep soil through the excavated special pipe 341. The diversion and guiding component 225 realizes the diversion and control function of the remediation agent. The positioning ring 2251, as a transfer chamber, receives the remediation agent flowing out of the outlet of the fixed pipe 222 and distributes and transports the remediation agent through the guide pipe 2253. The setting of the electrically controlled valve can precisely control the flow rate of the remediation agent flowing to the deep soil injection component 3 and adjust it according to the degree of soil pollution and remediation needs. The fixed plate 2252 supports and positions the positioning ring 2251 to ensure the stability of the positioning ring 2251 when receiving high-pressure remediation agent outside the fixed pipe 222. This diversion design enables the equipment to perform surface spraying and deep injection at the same time, and the flow rate of the remediation agent in the two modes can be controlled independently, realizing the optimized allocation and precise application of remediation agent resources.

[0025] like Figures 4 to 5 As shown, the spraying component 23 includes a square-round pipe 231, which is connected to the top of the fixed pipe 222 via a rotary joint. The bottom of the square-round pipe 231 is connected to a spray box 232, and multiple nozzles 233 are connected to the spray box 232.

[0026] Specifically, the square-round tube 231 is hollow inside, with round upper and lower ends and a square middle section, matching the internal shape of the rotary adjusting gear 243. This square shape limits the rotation of the gear 243, allowing it to drive the square-round tube 231 to rotate synchronously and adjust the spray angle of multiple nozzles 233 on the spray box 232. The spraying component 23 achieves the rotary spraying function of the surface repair agent. The square-round tube 231 is connected to the fixed tube 222 via a rotary joint, ensuring continuous delivery of the repair agent while allowing the square-round tube to rotate. The pipe 231 rotates relative to the fixed pipe 222, and the multiple nozzles 233 on the spray box 232 are arranged in a ring. When the pipe 231 rotates, it forms a 360° spray coverage range. When the pipe 231 does not rotate, it can also spray in a directional manner. This design solves the problem of limited spray range of traditional fixed nozzles 233, so that the surface repair agent can be evenly covered on the soil surface to form an effective barrier layer. The rotating spraying method can also automatically adjust the spraying angle according to the direction of travel during the equipment movement to ensure that there are no dead corners in the spraying, thus improving the uniformity and efficiency of surface repair.

[0027] like Figures 1 to 5 As shown, the driving component 24 includes a drive motor 241, which is fixedly mounted on the storage tank 21 via a metal bracket. A drive gear 242 is connected to the drive motor 241. A gear of the same shape as the drive gear 242 meshes with the fixed tube 222, and the rotation of the fixed tube 222 is driven by the rotational force of the drive gear 242. A rotary adjustment gear 243 that meshes with the drive gear 242 is slidably connected to the square-round tube 231. A supporting semi-ring 2 is connected to the storage tank 21. 44. A support plate 245 is connected to the support half-ring 244. The support plate 245 is sleeved on the square and round tube 231. An electromagnetic ring 246 is connected to the bottom of the support plate 245. The electromagnetic ring 246 is used to control the position of the rotary adjustment gear 243. When energized, it magnetically attracts the rotary adjustment gear 243, causing it to disengage from the drive gear 242. A friction stabilizing plate 247 is connected to the support half-ring 244. The friction stabilizing plate 247 is sleeved on the bottom of the surface of the square and round tube 231 and makes frictional contact with it.

[0028] Specifically, the drive component 24 realizes the power transmission and control of the fixed pipe 222 and the spraying component 23. The drive motor 241 meshes with the gear on the fixed pipe 222 through the drive gear 242, transmitting power to the fixed pipe 222, which drives the conveying blades 223 and the stirring plate 2242 to work. The rotary adjusting gear 243 is slidably connected to the square-round pipe 231. When the electromagnetic ring 246 is de-energized, the rotary adjusting gear 243 falls onto the square-round pipe 231 under the action of gravity and engages with the square-round pipe 231. At the same time, it meshes with the drive gear 242 through the external tooth groove, driving the square-round pipe 231 to rotate. When the electromagnetic ring 246 is energized, it generates a magnetic force to attract the rotary adjusting gear 243 to move upward, causing... When it disengages from the drive gear 242 and the directional structure on the square-round tube 231, the square-round tube 231 stops rotating. This design enables the spraying component 23 to switch between different operating modes: when a 360-degree surface spray is required, the electromagnetic ring 246 is de-energized, and the spraying component 23 rotates. The friction stabilizer 247 provides auxiliary support and stability to the square-round tube 231 through friction, preventing excessive swaying during rotation. The support semi-ring 244 and the support plate 245 constitute the limiting structure of the square-round tube 231, ensuring its rotational stability. The power supply for conveying, mixing, and spraying functions is achieved through a single drive motor 241, demonstrating excellent integrated design.

[0029] like Figures 1 to 6 As shown, the excavation and fluid delivery integrated unit 34 includes an excavation tube 341, which is connected to a control tube 33. A sealing block 342 is connected to the excavation tube 341 and is slidably connected inside the excavation tube 341. A connecting tube 343 is connected to the excavation tube 341 and is equipped with a spring 344 inside the connecting tube 343. The bottom of the spring 344 contacts the top of the sealing block 342. A contact block 345 is connected to the bottom of the sealing block 342 and is slidably connected inside the excavation tube 341.

[0030] Specifically, one side of the excavation tube 341 is triangular, allowing it to slide open in the soil like a knife, enabling the outlet end of the tube 341 to enter the deep soil. The contact force between the soil and the contact block 345 pushes up the sealing block 342, opening the tube 341 and allowing the repair agent to flow into the soil from the outlet end. The spring 344, after the tube 341 detaches from the soil and the contact force with the soil disappears, pushes the sealing block 342 and contact block 345 back to their original positions, continuing to seal the interior of the tube 341. The repair agent is only injected after the tube is inserted into and comes into contact with the soil. The excavation and liquid delivery unit 34 is the core actuator of the deep soil injection assembly 3, realizing an intelligent injection function with automatic opening and closing via contact. The triangular shape of the excavation tube 341... The design allows it to smoothly cut into the soil during equipment movement, forming an injection channel. The key innovation is the automatic valve mechanism composed of sealing block 342 and contact block 345. When the excavated tube 341 is inserted into the soil, the soil exerts an upward thrust on the contact block 345, overcoming the force of spring 344 and pushing sealing block 342 upward, opening the liquid outlet channel and automatically injecting the remediation agent into the soil. When the excavated tube 341 leaves the soil, the force of spring 344 pushes sealing block 342 and contact block 345 back to their original positions, closing the liquid outlet channel and preventing remediation agent leakage. This design achieves intelligent control of injecting when soil is present and closing when soil is absent, avoiding waste of remediation agent in the air or on the surface, saving remediation agent and preventing secondary pollution. At the same time, this mechanical automatic valve does not require external control signals, has high reliability, and is simple to maintain, making it particularly suitable for long-term operation in harsh soil environments.

[0031] like Figures 1 to 3 As shown, the soil to be injected by the deep soil injection component 3 is plowed on the base plate 1 by the plowing component 4 to loosen the soil and facilitate the injection of the repair agent. The plowing component 4 includes a movable plate 41, which is set on the base plate 1. A limit frame 42 is set on the movable plate 41 and connected to the base plate 1. A screw 43 is threadedly connected to the movable plate 41. The top of the screw 43 is movably connected to the inside of the limit frame 42, and the bottom of the screw 43 is movably connected to the base plate 1. A plowing blade 44 is fixedly installed on the right side of the movable plate 41.

[0032] Specifically, the plowing component 4 assists in loosening the soil to be injected by the deep soil injection component 3. After the soil is plowed, it allows the subsequent excavation tube 341 to further open the soil into deeper soil layers for the injection of the repair agent. Furthermore, the screw 43's force on the moving plate 41 allows the moving plate 41 to drive the plowing blade 44, controlling the plowing depth. When not in use, the plowing blade 44 can be raised and adjusted without affecting the movement of the base plate 1. As a pretreatment device for deep soil injection, the plowing component 4 loosens the soil beforehand with the plowing blade 44, reducing the resistance of the excavation tube 341 cutting into the soil, improving injection efficiency, and simultaneously reducing the need for the excavation tube 341 to cut into the soil. The wear of component 1 is mitigated by the screw 43 adjustment mechanism, which enables precise control of the plowing depth. The plowing depth can be flexibly adjusted according to soil hardness, moisture and other conditions to ensure that the plowing effect matches the subsequent injection requirements. The limit frame 42 guides and limits the moving plate 41 to ensure that the plowing blade 44 moves stably in the vertical direction. When the equipment moves or is moved in a non-working area, the plowing blade 44 can be raised to a high position by the screw 43 to avoid contact with the ground and reduce walking resistance. The coordinated work of the plowing component 4 and the deep soil injection component 3 forms a continuous operation process of loosening soil, trenching and injection, making deep injection smoother and more efficient, and further improving the overall repair performance of the equipment.

[0033] The working principle of this invention: After the equipment is started, the tire motor at the bottom of the base plate 1 drives the equipment to move on the contaminated soil site. During the movement, the drive motor 241 drives the fixed pipe 222 to rotate through the drive gear 242. The fixed pipe 222 simultaneously drives the conveying blades 223 and the stirring plate 2242 to work. The remediation agent in the storage tank 21 begins to mix and be pre-conveyed. The inlet above the storage tank 21 can be used to add the remediation agent and various additives. The fixed pipe 222 rotates under the drive of the drive motor 241, and the stirring support plate 2241 and stirring plate 2242 on it continuously stir the remediation agent in the storage tank 21 to ensure that the remediation agent and additives are fully mixed, avoiding precipitation, stratification or clumping, and maintaining the uniformity of the remediation agent concentration and reactivity. At the same time, the conveying... The blade 223 rotates within the delivery cylinder 221 along with the fixed pipe 222, generating centrifugal force to draw the repair agent from the bottom of the storage tank 21 into the delivery cylinder 221 through the opening on the outside of the delivery cylinder 221. Under the squeezing action of the delivery blade 223, the repair agent enters the fixed pipe 222 through the opening, forming a repair agent flow with a certain pressure. The repair agent in the fixed pipe 222 flows through the outlet into the positioning ring 2251 sleeved on the outside of the fixed pipe 222. The repair agent in the positioning ring 2251 flows to the deep soil injection component 3 through the guide pipe 2253 and the installation pipe 2254. Another path of repair agent flow in the fixed pipe 222 flows to the surface spraying component through the square-circle pipe 231. When surface spraying is required, the electromagnetic ring 246 is de-energized, and the rotating adjusting gear 243 is activated. As the device falls under gravity, its internal square hole engages with the square structure in the middle section of the square-round tube 231. Simultaneously, the tooth groove of the rotating adjusting gear 243 meshes with the drive gear 242. The rotational force of the drive gear 242 is transmitted to the square-round tube 231 through the rotating adjusting gear 243, causing the square-round tube 231 to rotate. The square-round tube 231 is connected to the top of the fixed tube 222 through a rotary joint. The remediation agent enters the square-round tube 231 from the fixed tube 222 through the rotary joint, then flows into the spray box 232, and finally is sprayed outward through multiple ring-shaped nozzles 233. Due to the continuous rotation of the square-round tube 231, the nozzles 233 form a 360° spray coverage area, and the remediation agent is evenly covered on the soil surface, forming a barrier layer. During the movement of the equipment, the rotating spray... The spraying angle can be automatically adjusted according to the direction of travel to ensure no blind spots, improving the uniformity and efficiency of surface repair. When only deep injection is needed, the plowing component 4 first pre-treats the soil during the equipment's movement. The height of the plowing blade 44 is adjusted by the screw 43, allowing the blade to cut into the soil at a preset depth, loosening the soil and reducing the resistance of the subsequent excavation tube 341. Then, the deep soil injection component 3 starts working. The reduction motor 32 drives the control tube 33 to rotate. The control tube 33 is connected to the delivery tube 31 through a rotary joint. The repair agent enters the control tube 33 from the delivery tube 31. The excavation tube 341 is connected to the end of the control tube 33. Its triangular design allows it to smoothly cut into the loosened soil during the equipment's movement.An injection channel is formed. When the excavation tube 341 is rotated and inserted into the soil, the soil exerts an upward thrust on the contact block 345, overcoming the force of the spring 344 and pushing the sealing block 342 upward, opening the outlet channel of the excavation tube 341. The remediation agent is automatically injected into the deep soil. When the excavation tube 341 leaves the soil, the thrust of the soil on the contact block 345 disappears, and the force of the spring 344 pushes the sealing block 342 and the contact block 345 back to their original positions, closing the outlet channel and preventing remediation agent leakage. This achieves intelligent control of injection when soil is present and closure when soil is absent, allowing the remediation agent to be directly injected into the soil. In the heavy metal enrichment zone below the topsoil, the technical challenge of vertical migration of surface-sprayed remediation agents has been overcome, significantly improving the remediation effect of deeply contaminated soil. The remediation agent cover layer formed by surface spraying prevents the migration of surface pollutants, while deep injection directly delivers the remediation agent to the core contaminated area. The synergistic effect of both forms a three-dimensional remediation system of surface barrier and deep remediation. This system prevents the loss and secondary pollution of surface remediation agents due to sunlight, wind, and rain, while ensuring the effective treatment of deep pollutants, significantly improving remediation efficiency and thoroughness.

[0034] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A soil ecological remediation device for heavy metal pollution, comprising a base plate (1), characterized in that, Also includes The mixing and conveying integrated component (2) is fixedly installed on the base plate (1) and is used to mix and convey the repair agent. The mixing and conveying integrated assembly (2) includes a liquid storage tank (21). The repair agent inside the liquid storage tank (21) is conveyed out of the liquid storage tank (21) and dispersed through a conveying component (22). The repair agent conveyed by the conveying component (22) is sprayed around the top of the liquid storage tank (21) through a spraying component (23). The top of the liquid storage tank (21) drives the conveying component (22) and the spraying component (23) through a driving component (24). Deep soil injection assembly (3), which is set at the bottom of the base plate (1) and is used to spray the remediation agent into the deep soil; The deep soil injection component (3) includes a delivery pipe (31), which is located at the bottom of the base plate (1). A reduction motor (32) is fixedly installed on the base plate (1). The output end of the reduction motor (32) is connected to a control pipe (33). The control pipe (33) is connected to the delivery pipe (31) through a rotary joint. The bottom of the base plate (1) is excavated by the excavation and liquid delivery integrated component (34) and the repair agent is injected into it.

2. The soil ecological remediation equipment for heavy metal pollution according to claim 1, characterized in that, The conveying component (22) includes a conveying cylinder (221), which is connected to the inside of the storage tank (21). A fixed tube (222) is rotatably connected inside the conveying cylinder (221). A conveying blade (223) is connected to the fixed tube (222) and contacts the inner wall of the conveying cylinder (221). The repair agent conveyed by the conveying blade (223) is pressurized and injected into the fixed tube (222) through the port. The repair agent is conveyed by the stirring component (224) on the fixed tube (222) while the repair agent is being conveyed, and the repair agent inside the storage tank (21) is stirred to make it evenly mixed. The repair agent is conveyed to the conveying pipe (31) through the diversion and guiding component (225) on the fixed tube (222).

3. The soil ecological remediation equipment for heavy metal pollution according to claim 2, characterized in that, The stirring component (224) includes a stirring support plate (2241), which is connected to a fixed pipe (222). A stirring plate (2242) is connected to the stirring support plate (2241) for stirring and mixing the repair agent inside the liquid storage tank (21).

4. The soil ecological remediation equipment for heavy metal pollution according to claim 3, characterized in that, The diversion and guiding component (225) includes a positioning ring (2251), which is sleeved on the outside of the fixed tube (222). A fixing plate (2252) is sleeved on the fixed tube (222). The outside of the fixing plate (2252) is fixed to the inner wall of the liquid storage tank (21). The repair agent is continuously delivered from the outside of the fixed tube (222) to the inside of the positioning ring (2251) through the liquid outlet. A guide tube (2253) is connected to the positioning ring (2251). An installation tube (2254) is connected to the guide tube (2253) through an electric control valve. The bottom end of the installation tube (2254) is connected to the top end of the control tube (33).

5. The soil ecological remediation equipment for heavy metal pollution according to claim 4, characterized in that, The spraying component (23) includes a square-round tube (231), which is connected to the top of a fixed tube (222) via a rotary joint. The bottom of the square-round tube (231) is connected to a spray box (232), and multiple nozzles (233) are connected to the spray box (232).

6. The soil ecological remediation equipment for heavy metal pollution according to claim 5, characterized in that, The driving component (24) includes a drive motor (241), which is fixedly mounted on the liquid storage tank (21) by a metal bracket. A drive gear (242) is connected to the drive motor (241). A gear of the same shape as the drive gear (242) meshes with the fixed tube (222). The rotational power of the drive gear (242) drives the fixed tube (222) to rotate. A sliding connection is made on the square-round tube (231) to mesh with the drive gear (242). The rotating adjusting gear (243) is connected to the liquid storage tank (21), the supporting half ring (244) is connected to the supporting half ring (244), the supporting plate (245) is connected to the supporting half ring (244), the supporting plate (245) is sleeved on the square and round tube (231), the bottom of the supporting plate (245) is connected to the electromagnetic ring (246), the supporting half ring (244) is connected to the friction stabilizing plate (247), the friction stabilizing plate (247) is sleeved on the bottom of the surface of the square and round tube (231) and makes frictional contact with it.

7. The soil ecological remediation equipment for heavy metal pollution according to claim 1, characterized in that, The excavation fluid delivery unit (34) includes an excavation tube (341), which is connected to a control tube (33). A sealing block (342) is connected to the excavation tube (341), and the sealing block (342) is slidably connected inside the excavation tube (341). A connecting tube (343) is connected to the excavation tube (341), and a spring (344) is provided inside the connecting tube (343). The bottom of the spring (344) contacts the top of the sealing block (342), and a contact block (345) is connected to the bottom of the sealing block (342). The contact block (345) is slidably connected inside the excavation tube (341).

8. The soil ecological remediation equipment for heavy metal pollution according to claim 1, characterized in that, The soil to be injected by the deep soil injection component (3) is plowed on the base plate (1) by the plowing component (4) to loosen the soil and facilitate the injection of the repair agent. The plowing component (4) includes a moving plate (41) which is set on the base plate (1). A limit frame (42) is set on the moving plate (41) and the limit frame (42) is connected to the base plate (1). A screw (43) is threaded on the moving plate (41). The top of the surface of the screw (43) is movably connected to the inside of the limit frame (42), and the bottom end of the screw (43) is movably connected to the base plate (1). A plowing blade (44) is fixedly installed on the right side of the moving plate (41).

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