In-situ biaxial three-stage soil remediation device

Abstract

The in-situ dual-axis three-stage soil remediation device includes a vehicle body, chassis, tracked walking device, cab, power system, hydraulic station, lifting frame, and dual-axis soil breaking and mixing three-stage drilling device. The cab is located at the front left of the vehicle body, the power system is located at the rear of the vehicle body, the hydraulic station is located on the left side of the vehicle body, and the lifting frame is located at the upper-middle front of the vehicle body. The dual-axis soil breaking and mixing three-stage drilling device is mounted on the lifting frame. The power system provides power to the tracked walking device and hydraulic station through a power reduction gearbox, and the hydraulic station provides hydraulic power to the lifting frame and the dual-axis soil breaking and mixing three-stage drilling device. This invention uses a three-stage drill bit that integrates breaking and mixing, which can effectively scan and break soil particles layer by layer and fully mix the soil and chemical particles. Dual-axis operation allows for two soil remediation operations to be performed at the same time, effectively improving work efficiency, reducing operation frequency, and reducing energy consumption.

Description

Technical Field

[0001] This invention relates to the field of soil remediation technology, specifically to an in-situ biaxial three-stage soil remediation device. Background Technology

[0002] Current in-situ soil remediation devices primarily alter soil particle size and increase the binding affinity with remediation agents through methods such as forceful cutting and rolling. Among the equipment used for heavy metal contaminated soil remediation, the main in-situ mixing equipment falls into two categories: turners / drum mixers and auger drills / shotcrete machines. While these offer high site adaptability, their disadvantages include poor soil-remediation agent mixing performance and inability to address soil depth variations. Domestic site remediation projects often involve purchasing or leasing this type of equipment. Even domestically produced equipment, such as the KH200 environmental remediation integrated machine from Shanghai Kangheng Remediation Company, is largely based on import and imitation. Existing domestic in-situ soil remediation devices suffer from low efficiency: either the device has high crushing efficiency but low agent-soil homogeneity, or high soil homogeneity but low crushing rate. Furthermore, they are difficult to maintain and have short lifespans, failing to meet current environmental remediation requirements. This hinders the large-scale and high-quality development of in-situ soil remediation devices and negatively impacts the efficiency of heavy metal soil remediation.

[0003] In summary, efficiency improvement, intelligent control, and the localization of core components are urgent issues that need to be addressed in remediation equipment. Therefore, how to provide a novel in-situ soil remediation device that addresses the problems of low crushing rate, poor homogenization, and low automation in the treatment of heavy metals in soil at different depths, achieving diversified operation modes of automated soil crushing, chemical discharge, and homogenization, saving a significant amount of labor in the soil remediation process, thereby improving the passivation efficiency of heavy metals in the soil, and solving the problems of low efficiency, short service life, complex structure, and inconvenient control of traditional ordinary soil remediation devices, has become a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide an in-situ biaxial three-stage soil remediation device. This invention is scientifically designed, has a reasonable structure, is simple to operate, and is easy to control. It adopts a three-stage drill bit that integrates crushing and mixing, which can effectively scan and crush soil particles layer by layer and fully mix the chemical soil particles. It adopts biaxial operation, which can perform two soil remediation operations at the same time, effectively improving work efficiency, saving operation frequency, and reducing energy consumption.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The in-situ dual-axis three-stage soil remediation device includes a vehicle body, chassis, tracked walking device, cab, power system, hydraulic station, lifting frame, and dual-axis soil breaking and mixing three-stage drilling device. The vehicle body is located on the upper part of the chassis, the tracked walking device is installed on the left and right sides of the chassis, the cab is located at the front left of the vehicle body, the power system is located at the rear of the vehicle body, the hydraulic station is located on the left side of the vehicle body, the lifting frame is located at the upper-middle front of the vehicle body, and the dual-axis soil breaking and mixing three-stage drilling device is installed on the lifting frame. The power system provides power to the tracked walking device and hydraulic station through a power reduction gearbox, and the hydraulic station provides hydraulic power to the lifting frame and the dual-axis soil breaking and mixing three-stage drilling device. The cab is equipped with a control panel, which is electrically connected to the lifting frame and the dual-axis soil breaking and mixing three-stage drilling device.

[0007] The lifting frame includes two sets of drill mast assemblies. The two sets of drill mast assemblies are identical in structure and symmetrically arranged. The drill mast assembly on the left includes a mast, a triangular support, a lifting link, a first telescopic synchronous hydraulic cylinder, and a second telescopic synchronous hydraulic cylinder. The mast is vertically positioned at the front of the vehicle body. The triangular support is vertically positioned along the front-rear direction, with its three corners distributed at the front, bottom, and rear. The front corner of the triangular support is hinged to the lower rear side of the mast, and its hinge axis is horizontally positioned along the left-right direction. The lifting link is arranged side by side on the left and right sides. Two lifting rods, with the front higher than the rear, are inclined between the vehicle body and the triangular support. The lower ends of both lifting rods are hinged to the front edge of the vehicle body, and their hinge axes are horizontally aligned in the left-right direction. The upper ends of both lifting rods are hinged to the lower corner of the triangular support, and their hinge axes are horizontally aligned in the left-right direction. Two first telescopic synchronous hydraulic cylinders are arranged side by side, with the front higher than the rear, inclined between the two lifting rods. The lower ends of the cylinder bodies of both first telescopic synchronous hydraulic cylinders are hinged to the front side of the vehicle body, and their hinge axes are horizontally aligned in the left-right direction. The system is horizontally arranged in the left-right direction. The piston rods of the two first telescopic synchronous hydraulic cylinders extend forward and upward. The upper ends of the piston rods of the two first telescopic synchronous hydraulic cylinders are hinged to the lower side of the rear corner of the triangular support, and their hinge axes are horizontally arranged in the left-right direction. Two second telescopic synchronous hydraulic cylinders are arranged side by side on the left and right sides, with the front higher than the rear, and are inclined above the triangular support. The lower ends of the cylinder bodies of the two second telescopic synchronous hydraulic cylinders are hinged to the upper side of the rear corner of the triangular support, and their hinge axes are horizontally arranged in the left-right direction. The piston rods of the two second telescopic synchronous hydraulic cylinders extend forward and upward. The upper ends of the piston rods of the two second telescopic synchronous hydraulic cylinders are hinged to the middle of the rear side of the mast, and their hinge axes are horizontally arranged in the left-right direction. The mast is equipped with a wire rope lifting mechanism for hoisting the dual-axis soil breaking and mixing three-section drilling device. The hydraulic station is connected to each of the first telescopic synchronous hydraulic cylinders and each of the second telescopic synchronous hydraulic cylinders through hydraulic pipelines. The control panel is connected to each of the first telescopic synchronous hydraulic cylinders and each of the second telescopic synchronous hydraulic cylinders via signal connections.

[0008] The wire rope lifting mechanism includes a hydraulic winch fixed to the lower rear of the mast. A first fixed pulley, located above the hydraulic winch, is rotatably mounted on the upper rear of the mast. A crane head, horizontally positioned along the front-rear direction, is located at the upper end of the mast. The front end of the crane head has a front U-shaped groove that is open at both ends and open at the front, while the rear end has a rear U-shaped groove that is open at both ends and open at the rear. A second fixed pulley, located on the upper front side of the mast, is rotatably mounted within the front U-shaped groove, and a guide pulley, located directly above the first fixed pulley, is rotatably mounted within the rear U-shaped groove. The central shafts of the first fixed pulley, the second fixed pulley, and the guide groove pulley are all horizontally arranged in the left-right direction. The steel wire rope wound on the drum of the hydraulic winch extends upward and wraps around the rear side of the first fixed pulley and the upper rear part of the guide groove pulley in sequence. Then the steel wire rope extends horizontally forward and wraps around the upper front part of the second fixed pulley. After that, the steel wire rope extends vertically downward and is hoisted to the top of the dual-shaft soil breaking and mixing three-section drilling device. The hydraulic station is connected to the hydraulic motor of the hydraulic winch through hydraulic pipelines. The control panel is connected to the hydraulic motor control valve group of the hydraulic winch via signal.

[0009] The dual-axis soil breaking and mixing three-stage drilling device includes a chemical supply tank and two soil breaking drilling rig components. The two soil breaking drilling rig components have the same structure and are symmetrically installed on the front side of two masts respectively. The chemical supply tank is installed on the upper part of the two soil breaking drilling rig components.

[0010] The soil breaking drill assembly on the left includes a fully hydraulic power head, drill rod, and a three-section drill bit. The fully hydraulic power head is vertically slidably connected to the front of the mast on the left. Both the drill rod and the three-section drill bit are vertically positioned. The upper end of the drill rod is coaxially connected to the lower end of the output shaft of the fully hydraulic power head, and the lower end of the drill rod is coaxially threaded to the upper end of the three-section drill bit. Both the drill rod and the three-section drill bit are hollow structures. A chemical auger conveyor is centrally located inside both the drill rod and the three-section drill bit. The hydraulic motor of the chemical auger conveyor is located at the upper end of the inner hole of the drill rod, and the central shaft of the chemical auger conveyor is centrally located inside the drill rod and the three-section drill bit. The lower end of the central shaft of the drug delivery auger rotates at the lower end of the inner hole of the three-section drill bit. The spiral blades of the drug delivery auger are spirally arranged along its central shaft. The conveying direction of the drug delivery auger is from top to bottom. Several circular arrays of discharge holes connected to the inside of the three-section drill bit are opened on the lower outer wall. The top of the fully hydraulic power head is hoisted and connected to the wire rope extension end of the hydraulic winch on the left. The hydraulic station is connected to the hydraulic motors of the fully hydraulic power head and the drug delivery auger through hydraulic pipelines. The control panel is connected to the hydraulic motors of the fully hydraulic power head and the drug delivery auger through signals.

[0011] The medicine supply box is horizontally positioned, with a medicine addition cover on the front side plate. Two drill rods are vertically inserted through the medicine supply box. The top and bottom plates of the medicine supply box are rotatably connected to the two drill rods via sealed bearings. The medicine supply box contains two sealing sleeves spaced apart from each other. The upper and lower ends of the sealing sleeves are fixedly connected to the inner surfaces of the top and bottom plates of the medicine supply box, respectively. The two sealing sleeves are concentrically fitted onto the outside of the corresponding two drill rods. The inner diameter of the sealing sleeves is larger than the outer diameter of the drill rods. Several medicine supply holes are opened on the side walls of both sealing sleeves, and several medicine inlet holes located in the corresponding sealing sleeves are opened on the side walls of each drill rod.

[0012] The three-section drill bit includes a drill shaft and a positioning drill tip. The upper end of the drill shaft is coaxially threaded to the lower end of the drill rod. The positioning drill tip is a tapered tip, wider at the top and narrower at the bottom, with its upper end welded to the lower end of the drill shaft. The drill shaft is a hollow shaft, and its inner bore corresponds vertically to the inner bore of the drill rod. The lower end of the central shaft of the drug delivery auger rotates at the lower end of the inner bore of the drill shaft. The outer circumference of the drill shaft is divided into three sections from bottom to top. Counting from bottom to top, the first section of the drill shaft has several circumferentially arrayed, spirally arranged digging helical blades along the axial direction on its outer circumference. The various drug discharge holes are arranged in a circumferential array on the outer circumference of the first section of the drill shaft. The digging helical blades and... The discharge holes are arranged at intervals in the circumferential direction. The lower edge of each digging spiral blade extends to the lower outer circle of the drill shaft. Each digging spiral blade has a bucket tooth on its lower edge. Transition spiral blades are spirally arranged axially on the outer circumference of the second section of the drill shaft. Mixing spiral blades are spirally arranged axially on the outer circumference of the third section of the drill shaft. The circumferential diameter of the outer circle of the digging spiral blade is larger than that of the outer circle of the transition spiral blade. The circumferential diameter of the outer circle of the transition spiral blade is larger than that of the outer circle of the mixing spiral blade. The length of the third section of the drill shaft is greater than the sum of the lengths of the first and second sections of the drill shaft.

[0013] This invention possesses significant substantive features and substantial advancements compared to existing technologies. Specifically, the working principle of this invention is as follows: Initially, all first and second telescopic synchronous hydraulic cylinders are in a retracted state, resulting in the two masts being horizontally folded and stored on the upper part of the vehicle body. The operator can then open the dosing cap to add the chemical to the supply tank. After adding the chemical, the dosing cap is closed, and the operator drives the in-situ dual-axis three-section soil remediation device to the work site from the cab. Then, the operator controls the operation of each first and second telescopic synchronous hydraulic cylinder via the control panel. The piston rods of each first telescopic synchronous hydraulic cylinder extend synchronously, causing the two masts to rise under the action of the corresponding lifting linkage. Simultaneously, the piston rods of each second telescopic synchronous hydraulic cylinder extend synchronously, causing the two masts to rotate from horizontal to vertical, perpendicular to the ground. With the lower ends of the two masts supported on the ground, the two hydraulic winches are started and slowly unwind the wire rope, thus slowly lowering the two corresponding fully hydraulic power heads. This avoids shaking of the drill rods and three-section drill bits due to rapid descent. Simultaneously, the operator can monitor the relative position of the three-section drill bits to the ground in real time via the control panel to prevent premature ground contact. When the two three-section drill bits are 10cm from the ground, the operator starts the two fully hydraulic power heads via the control panel. The two fully hydraulic power heads drive the corresponding drill rods to rotate, transmitting torque and pressure to the corresponding three-section drill bits through the drill rods. Once the two three-section drill bits reach the target operating speed, drilling begins. The two hydraulic winches are then slowly unwinded, causing the two fully hydraulic power heads to slowly move down along the corresponding masts, and the two three-section drill bits to move down slowly as well.As the corresponding positioning drill tip begins to move downwards to the soil surface, it gradually breaks up the soil at its center, achieving the first stage of soil fragmentation. After this initial fragmentation, the drill shaft continues to move downwards until the lower edge of the digging auger blades contacts the soil. The teeth at the lower edge of the auger blades then perform a second stage of soil fragmentation around the positioning drill tip, creating large soil blocks. This second fragmentation also expands the working area for the first time. Subsequently, the drill rod continues to move downwards until the upper edge of the digging auger blades contacts the soil. When drilling into the soil, the working area can be expanded a second time. The first section of the drill shaft is completely drilled into the soil. During the digging and breaking-down process, as the auger blades move down with the drill rod, the chemicals in the supply tank continuously enter the annular cavity between the corresponding sealing sleeve and the drill rod through the various supply holes on the two sealing sleeves. The chemicals then continuously enter the interior of the corresponding drill rod through the inlet holes on the corresponding drill rod. The operator starts the chemical conveyor in the two drill rods via the control panel. The corresponding chemical conveyor continuously transports the chemicals in the drill rods downwards to the bottom of the corresponding drill shaft, allowing the chemicals in the two drill shafts to pass through the corresponding supply holes. High-pressure injection from the discharge holes achieves the first uniform mixing of the pesticide with soil particles, passivating heavy metals in the soil and remediating it. Next, the drill rod continues downward under the action of the fully hydraulic power head. Large chunks of soil broken up by the excavating auger blades are transported upwards along the helical surface of the auger blades to the vicinity of the second drill shaft. The second drill shaft begins to drill into the soil, and the transition auger blades move downwards with the drill shaft until they contact the soil. The transition auger blades then compress and mix the large chunks of soil with the pesticide, achieving a second uniform mixing of the pesticide and soil particles. Furthermore, the transition auger blades compress the large chunks of soil... At the same time, it can also break up large clumps of soil into smaller clumps, achieving the third breaking of the soil and the third expansion of the working area. As the drill rod continues to move downward, the second section of the drill shaft is completely drilled into the soil. The second uniformly mixed agent and soil particles are transported upward through the spiral surface of the transition spiral blades to the area around the third section of the drill shaft. The third section of the drill shaft begins to drill into the soil, and the mixing spiral blades thoroughly mix the agent and soil particles, achieving the third uniform mixing of the agent and soil particles, thus completing the goal of breaking up the soil particles and mixing them with the agent.As the three-section drill bit approaches the target depth, the descent speed of the wire rope is slowed down to ensure flexible contact between the positioning drill tip and the bottom of the hole, preventing rigid contact that could result in excess wire rope being released and causing tangling. After the three-section drill bit reaches the target depth, the two hydraulic winches stop unwinding the wire rope, while the two fully hydraulic power heads continue working for a certain period to maintain the crushing and homogenization process. After the crushing and homogenization work is completed, the two fully hydraulic power heads are slowly reversed, and simultaneously, the two hydraulic winches begin slowly winding up the wire rope, lifting the two fully hydraulic power heads and raising the two three-section drill bits to the soil surface. Soil backfilling is then carried out, completing one deep crushing and homogenization soil remediation operation.

[0014] This invention is easy to control and highly efficient, and achieves effective improvement in soil fragmentation rate, enhanced soil-chemical mixing, improved overall automation, and improved passivation efficiency of heavy metals in soil at different depths during heavy metal treatment.

[0015] This invention is scientifically designed, structurally sound, easy to operate, and convenient to control. It employs a three-section drill bit that integrates crushing and mixing, effectively crushing soil particles layer by layer and thoroughly mixing the medicinal soil particles.

[0016] This invention employs a dual-axis operation, enabling two soil remediation operations to be performed simultaneously, effectively improving work efficiency, reducing operation frequency, and decreasing energy consumption. Attached Figure Description

[0017] Figure 1 This is an isometric view of the present invention.

[0018] Figure 2 This is a front view of the present invention.

[0019] Figure 3 yes Figure 2 The right view.

[0020] Figure 4 This is a top view of the present invention.

[0021] Figure 5 yes Figure 1 Enlarged view of a portion of point A in the middle.

[0022] Figure 6 yes Figure 3 Enlarged view of section B in the middle. Detailed Implementation

[0023] The embodiments of the present invention are further described below with reference to the accompanying drawings.

[0024] like Figure 1-6As shown, the in-situ dual-axis three-stage soil remediation device includes a vehicle body 1, a chassis 2, a tracked walking device 3, a driver's cab 4, a power system 5, a hydraulic station, a lifting frame, and a dual-axis soil breaking and mixing three-stage drilling device. The vehicle body 1 is located on the upper part of the chassis 2. The tracked walking device 3 is installed on the left and right sides of the chassis 2. The driver's cab 4 is located at the front left of the vehicle body 1. The power system 5 is located at the rear of the vehicle body 1. The hydraulic station 30 is located on the left side of the vehicle body 1. The lifting frame is located at the upper-middle front of the vehicle body 1. The dual-axis soil breaking and mixing three-stage drilling device is installed on the lifting frame. The power system 5 provides power to the tracked walking device 3 and the hydraulic station 30 through a power reduction gearbox 29. The hydraulic station 30 provides hydraulic power to the lifting frame and the dual-axis soil breaking and mixing three-stage drilling device. The driver's cab 4 is equipped with a control panel, which is electrically connected to the power system 5, the lifting frame, and the dual-axis soil breaking and mixing three-stage drilling device.

[0025] The lifting frame includes two sets of drilling mast assemblies. The two sets of drilling mast assemblies are identical in structure and symmetrically arranged. The left drilling mast assembly includes a mast 6, a triangular support 7, a lifting link 8, a first telescopic synchronous hydraulic cylinder 9, and a second telescopic synchronous hydraulic cylinder 10. The mast 6 is vertically positioned at the front of the vehicle body 1. The triangular support 7 is vertically positioned along the front-rear direction, with its three corners distributed in front, bottom, and rear. The front corner of the triangular support 7 is hinged to the lower rear side of the mast 6, and its hinge axis is horizontally positioned along the left-right direction. The lifting link 8 is arranged side by side. Two lifting rods 8 are arranged side-by-side, with the front higher than the rear, and are inclined between the vehicle body 1 and the triangular support 7. The lower ends of both lifting rods 8 are hinged to the front edge of the vehicle body 1, and their hinge axes are horizontally arranged in the left-right direction. The upper ends of both lifting rods 8 are hinged to the lower corner of the triangular support 7, and their hinge axes are horizontally arranged in the left-right direction. Two first telescopic synchronous hydraulic cylinders 9 are arranged side-by-side, with the front higher than the rear, and are inclined between the two lifting rods 8. The lower ends of the cylinder bodies of the two first telescopic synchronous hydraulic cylinders 9 are hinged to the front side of the vehicle body 1, and their hinge axes are horizontally arranged in the left-right direction. The piston rods of the two first telescopic synchronous hydraulic cylinders 9 are horizontally arranged in the left-right direction, extending forward and upward. The upper ends of the piston rods of the two first telescopic synchronous hydraulic cylinders 9 are hinged to the lower side of the rear corner of the triangular support 7, and their hinge axes are horizontally arranged in the left-right direction. Two second telescopic synchronous hydraulic cylinders 10 are arranged side by side, with the front higher than the rear, and are inclined above the triangular support 7. The lower ends of the cylinder bodies of the two second telescopic synchronous hydraulic cylinders 10 are hinged to the upper side of the rear corner of the triangular support 7, and their hinge axes are horizontally arranged in the left-right direction. The piston rod of the synchronous hydraulic cylinder 10 extends forward and upward. The upper ends of the piston rods of the two second telescopic synchronous hydraulic cylinders 10 are hinged to the middle of the rear side of the mast 6, and their hinge axes are set horizontally in the left and right direction. The mast 6 is equipped with a wire rope lifting mechanism for hoisting the dual-shaft soil breaking and mixing three-section drilling device. The hydraulic station 30 is connected to each of the first telescopic synchronous hydraulic cylinders 9 and each of the second telescopic synchronous hydraulic cylinders 10 through hydraulic pipelines. The control panel is connected to each of the first telescopic synchronous hydraulic cylinders 9 and each of the second telescopic synchronous hydraulic cylinders 10 via signal.

[0026] The wire rope lifting mechanism includes a hydraulic winch, which is fixed to the lower rear side of the mast 6. A first fixed pulley 11, located above the hydraulic winch, is rotatably mounted on the upper rear side of the mast 6. A crane head 12, horizontally arranged in the front-rear direction, is located at the upper end of the mast 6. The front end of the crane head 12 has a front U-shaped groove 13 that is open at both ends and open at the front. The rear end of the crane head 12 has a rear U-shaped groove 14 that is open at both ends and open at the rear. A second fixed pulley 15, located on the upper front side of the mast 6, is rotatably mounted in the front U-shaped groove 13. A pulley located directly above the first fixed pulley 11 is rotatably mounted in the rear U-shaped groove 14. The guide groove wheel 16, the first fixed pulley 11, the second fixed pulley 15 and the guide groove wheel 16 are all horizontally arranged in the left and right direction. The steel wire rope wound on the drum of the hydraulic winch extends upward and wraps around the rear side of the first fixed pulley 11 and the upper rear part of the guide groove wheel 16 in sequence. Then the steel wire rope extends horizontally forward and wraps around the upper front part of the second fixed pulley 15. After that, the steel wire rope extends vertically downward and is hoisted to the top of the dual-shaft soil breaking and mixing three-section drilling device. The hydraulic station 30 is connected to the hydraulic motor of the hydraulic winch through a hydraulic pipeline. The control panel is connected to the hydraulic motor control valve group of the hydraulic winch via a signal connection.

[0027] The dual-axis soil breaking and mixing three-stage drilling device includes a chemical supply tank 17 and two soil breaking drilling rig components. The two soil breaking drilling rig components have the same structure and are symmetrically installed on the front side of two masts 6 respectively. The chemical supply tank 17 is installed on the upper part of the two soil breaking drilling rig components.

[0028] The soil breaking drill assembly on the left includes a fully hydraulic power head 18, a drill rod 19, and a three-section drill bit. The fully hydraulic power head 18 is vertically slidably connected to the front side of the mast 6 on the left. Both the drill rod 19 and the three-section drill bit are vertically positioned. The upper end of the drill rod 19 is coaxially connected to the lower end of the output shaft of the fully hydraulic power head 18, and the lower end of the drill rod 19 is coaxially threaded to the upper end of the three-section drill bit. Both the drill rod 19 and the three-section drill bit are hollow structures. A chemical auger conveyor is centrally located inside both the drill rod 19 and the three-section drill bit. The hydraulic motor of the chemical auger conveyor is located at the upper end of the inner hole of the drill rod 19. The central shaft of the chemical auger conveyor is centrally located on both the drill rod 19 and the three-section drill bit. Inside the segmented drill bit, the lower end of the central shaft of the drug auger conveyor rotates at the lower end of the inner hole of the three-section drill bit. The spiral blades of the drug auger conveyor are spirally arranged along its central shaft. The conveying direction of the drug auger conveyor is from top to bottom. Several circular arrays of discharge holes 20 are opened on the lower outer wall of the three-section drill bit and are connected to the inside of the three-section drill bit. The top of the full hydraulic power head 18 is hoisted and connected to the wire rope extension end of the hydraulic winch on the left side. The hydraulic station 30 is connected to the hydraulic motors of the full hydraulic power head 18 and the drug auger conveyor through hydraulic pipelines. The control panel is connected to the hydraulic motors of the full hydraulic power head 18 and the drug auger conveyor through signals.

[0029] The medicine supply box 17 is horizontally set, and a medicine addition cover is set on the front side plate of the medicine supply box 17. Two drill rods 19 are vertically inserted through the medicine supply box 17. The top plate and bottom plate of the medicine supply box 17 are rotatably connected to the two drill rods 19 through sealed bearings. Two sealing sleeves with left and right spacing are set inside the medicine supply box 17. The upper and lower ends of the sealing sleeves are fixedly connected to the inner surfaces of the top plate and bottom plate of the medicine supply box 17, respectively. The two sealing sleeves are respectively concentrically fitted on the outside of the corresponding two drill rods 19. The inner diameter of the sealing sleeve is larger than the outer diameter of the drill rod 19. Several medicine supply holes are opened on the side wall of the two sealing sleeves. Several medicine inlet holes located in the corresponding sealing sleeve are opened on the side wall of each drill rod 19.

[0030] The three-section drill bit includes a drill shaft 21 and a positioning drill tip 22. The upper end of the drill shaft 21 is coaxially threaded to the lower end of the drill rod 19. The positioning drill tip 22 is a tapered positioning tip that is larger at the top and smaller at the bottom. The upper end of the positioning drill tip 22 is welded to the lower end of the drill shaft 21. The drill shaft 21 is a hollow shaft, and the inner hole of the drill shaft 21 is vertically connected to the inner hole of the drill rod 19. The lower end of the central shaft of the drug conveyor rotates at the lower end of the inner hole of the drill shaft 21. The outer circumference of the drill shaft 21 is divided into three sections from bottom to top. Counting from bottom to top, the first section of the drill shaft 21 has several circumferentially arrayed and spirally arranged digging spiral blades 23 along the axial direction on its outer circumference. Each drug discharge hole 20 is arranged in a circumferential array on the outer circumference of the first section of the drill shaft 21. The auger blades 23 are arranged at intervals in the circumferential direction with the discharge hole 20. The lower edge of each auger blade 23 extends to the lower outer circle of the drill shaft 21. Each auger blade 23 has a bucket tooth 24 on its lower edge. The second section of the drill shaft 21 has a transition auger blade 26 spirally arranged along the axial direction on its outer circumference. The third section of the drill shaft 21 has a mixing auger blade 28 spirally arranged along the axial direction on its outer circumference. The circumferential diameter of the auger blade 23 is larger than that of the transition auger blade 26. The circumferential diameter of the transition auger blade 26 is larger than that of the mixing auger blade 28. The length of the third section of the drill shaft 21 is greater than the sum of the lengths of the first and second sections of the drill shaft 21.

[0031] The control panel, hydraulic winch, chemical auger conveyor, dosing cap, sealing sleeve, sealing bearing, chemical supply port, and chemical inlet port are not shown in the figure. The chassis 2, tracked walking device 3, cab 4, control panel, power system 5, hydraulic station 30, first telescopic synchronous hydraulic cylinder 9, second telescopic synchronous hydraulic cylinder 10, hydraulic winch, fully hydraulic power head 18, power reduction gearbox 29, chemical auger conveyor, and positioning drill tip 22 are all conventional technologies, and their specific structures and working principles will not be elaborated. The control panel is the equipment in the cab 4 for the operator to control the entire vehicle and the movement of various moving parts, including various control buttons and joysticks. It is a commonly used control device in large engineering vehicles, and can be referenced from existing medium and large rotary drilling rigs. The power system 5 is a diesel engine. The output shaft of the diesel engine drives the tracked walking device 3 and the hydraulic station 30 respectively through the power reduction gearbox 29. The diesel engine is started by an electric motor. This is a conventional vehicle starting technology, and its specific working principle will not be elaborated. It is commonly used in the starting of engines of automobiles, tractors, and large engineering vehicles.

[0032] The hydraulic pipelines and communication wires involved in this invention are not shown in the figures.

[0033] The working principle of this invention is as follows: Initially, all the first telescopic synchronous hydraulic cylinders 9 and all the second telescopic synchronous hydraulic cylinders 10 are in the retracted state, so the two masts 6 are horizontally folded and stored on the upper part of the vehicle body 1. The operator can then open the dosing cap and add the agent to the supply tank 17. After adding the agent, the dosing cap is closed, and the operator drives the in-situ dual-axis three-section soil remediation device to the work site from the cab 4. Then, the operator controls the operation of each of the first telescopic synchronous hydraulic cylinders 9 and each of the second telescopic synchronous hydraulic cylinders 10 through the control panel. The piston rods of each of the first telescopic synchronous hydraulic cylinders 9 extend synchronously, causing the two masts 6 to be lifted upward under the action of the corresponding lifting connecting rods 8. At the same time, the piston rods of each of the second telescopic synchronous hydraulic cylinders 10 extend synchronously, causing the two masts 6 to rotate from horizontal to vertical from forward and upward. The two masts 6 are perpendicular to the ground, and the lower ends of the two masts 6 are supported on the ground. Then, the two hydraulic winches are started, and they slowly unwind the wire rope, thereby slowly lowering the two corresponding fully hydraulic power heads 18. This avoids shaking of the corresponding drill rods 19 and the three-section drill bits due to rapid lowering. At the same time, the operator can monitor the relative position of the three-section drill bits to the ground in real time through the control panel to prevent the three-section drill bits from touching the ground prematurely. When the two three-section drill bits are 10cm away from the ground, the operator starts the two fully hydraulic power heads 18 through the control panel. The two fully hydraulic power heads 18 drive the corresponding drill rods 19 to rotate. The two fully hydraulic power heads 18 transmit torque and pressure to the corresponding three-section drill bits through the corresponding drill rods 19. After the two three-section drill bits reach the target working speed, drilling operations begin. The two hydraulic winches are controlled to slowly unwind the wire rope, and the two fully hydraulic power heads 18 slowly move down along the corresponding masts 6, and the two three-section drill bits slowly move down.When the corresponding positioning drill tip 22 begins to move downwards to the soil surface, it slowly breaks the soil at its corresponding center position, achieving the first soil fragmentation. After the positioning drill tip 22 achieves the first soil fragmentation, the drill shaft 21 continues to move downwards until the lower edge of the digging auger blade 23 contacts the soil. Then, the teeth 24 at the lower edge of the digging auger blade 23 will perform a second fragmentation on the soil around the positioning drill tip 22, forming large soil blocks. At the same time, the working area can be expanded for the first time during the second fragmentation process. Subsequently, the drill rod 19 continues to move downwards until the upper edge of the digging auger blade 23 contacts the soil. Upon reaching the soil, the working area can be expanded a second time. The first section of the drill shaft 21 is completely drilled into the soil. During the digging and breaking of soil by the excavating spiral blade 23 moving down with the drill rod 19, the chemicals in the chemical supply tank 17 continuously enter the annular cavity between the corresponding sealing sleeve and the drill rod 19 through the various chemical supply holes on the two sealing sleeves. The chemicals then continuously enter the interior of the corresponding drill rod 19 through the chemical inlet holes on the corresponding drill rod 19. The operator starts the chemical conveyor in the two drill rods 19 through the control panel. The corresponding chemical conveyor continuously transports the chemicals in the drill rods 19 downward to the bottom of the corresponding drill shaft 21, so that the chemicals in the two drill shafts 21 are connected. The agent is sprayed under high pressure through the corresponding discharge holes 20, achieving the first uniform mixing of the agent and soil particles. The agent passivates heavy metals in the soil, thus remediating the soil. Next, the drill rod 19 continues to move downwards under the action of the fully hydraulic power head 18. Large chunks of soil broken up by the digging auger blades 23 are transported upwards along the helical surface of the digging auger blades 23 to the vicinity of the second-section drill shaft 21. The second-section drill shaft 21 begins to drill into the soil, and the transition auger blades 26 move downwards with the drill shaft 21 until they contact the soil. The transition auger blades 26 then compress and mix the large chunks of soil with the agent, achieving the second uniform mixing of the agent and soil particles. Furthermore, the transition auger blades... When the drill rod 19 compresses large clods of soil, it can also break them down into smaller clods, achieving the third breaking of the soil and the third expansion of the working area. As the drill rod 19 continues to move downward, the second section of the drill shaft 21 is completely drilled into the soil. The second uniformly mixed agent and soil particles are transported upward on the spiral surface of the transition spiral blade 26 to the vicinity of the third section of the drill shaft 21. The third section of the drill shaft 21 begins to drill into the soil, and the mixing spiral blade 28 thoroughly mixes the agent and soil particles, achieving the third uniform mixing of the agent and soil particles, thus completing the goal of breaking the soil particles and mixing them with the agent.As the three-section drill bit approaches the target depth, the descent speed of the wire rope is slowed down, allowing the positioning drill tip 22 to make flexible contact with the bottom of the hole. This avoids rigid contact with the bottom, which would result in excess wire rope being released and prevent rope tangling. After the three-section drill bit reaches the target depth, the two hydraulic winches stop releasing the wire rope, while the two fully hydraulic power heads 18 continue working for a certain period to maintain the crushing and homogenizing operation. After the crushing and homogenizing operation is completed, the two fully hydraulic power heads 18 are slowly reversed, and simultaneously, the two hydraulic winches begin to slowly reel in the wire rope, lifting the two fully hydraulic power heads 18 and raising the two three-section drill bits to the soil surface. Soil backfilling is then carried out, completing one deep crushing and homogenizing soil remediation operation.

[0034] This invention is easy to control and highly efficient, and achieves effective improvement in soil fragmentation rate, enhanced soil-chemical mixing, improved overall automation, and improved passivation efficiency of heavy metals in soil at different depths during heavy metal treatment.

[0035] This invention is scientifically designed, structurally sound, easy to operate, and convenient to control. It employs a three-section drill bit that integrates crushing and mixing, effectively crushing soil particles layer by layer and thoroughly mixing the medicinal soil particles.

[0036] This invention employs a dual-axis operation, enabling two soil remediation operations to be performed simultaneously, effectively improving work efficiency, reducing operation frequency, and decreasing energy consumption.

[0037] The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An in-situ biaxial three-stage soil remediation device, characterized in that: The vehicle includes a body, chassis, tracked walking device, cab, power system, hydraulic station, lifting frame, and a dual-shaft soil breaking and mixing three-stage drilling device. The body is located on the upper part of the chassis, the tracked walking device is installed on the left and right sides of the chassis, the cab is located at the front left of the body, the power system is located at the rear of the body, the hydraulic station is located on the left side of the body, the lifting frame is located at the upper-middle front of the body, and the dual-shaft soil breaking and mixing three-stage drilling device is installed on the lifting frame. The power system provides power to the tracked walking device and hydraulic station through a power reduction gearbox, and the hydraulic station provides hydraulic power to the lifting frame and the dual-shaft soil breaking and mixing three-stage drilling device. The cab is equipped with a control panel, which is electrically connected to the lifting frame and the dual-shaft soil breaking and mixing three-stage drilling device. The lifting frame includes two sets of drill mast assemblies. The two sets of drill mast assemblies are identical in structure and symmetrically arranged. The drill mast assembly on the left includes a mast, a triangular support, a lifting link, a first telescopic synchronous hydraulic cylinder, and a second telescopic synchronous hydraulic cylinder. The mast is vertically positioned at the front of the vehicle body. The triangular support is vertically positioned along the front-rear direction, with its three corners distributed at the front, bottom, and rear. The front corner of the triangular support is hinged to the lower rear side of the mast, and its hinge axis is horizontally positioned along the left-right direction. The lifting link is arranged side by side on the left and right sides. Two lifting rods, with the front higher than the rear, are inclined between the vehicle body and the triangular support. The lower ends of both lifting rods are hinged to the front edge of the vehicle body, and their hinge axes are horizontally aligned in the left-right direction. The upper ends of both lifting rods are hinged to the lower corner of the triangular support, and their hinge axes are horizontally aligned in the left-right direction. Two first telescopic synchronous hydraulic cylinders are arranged side by side, with the front higher than the rear, inclined between the two lifting rods. The lower ends of the cylinder bodies of both first telescopic synchronous hydraulic cylinders are hinged to the front side of the vehicle body, and their hinge axes are horizontally aligned in the left-right direction. The system is horizontally arranged in the left-right direction. The piston rods of the two first telescopic synchronous hydraulic cylinders extend forward and upward. The upper ends of the piston rods of the two first telescopic synchronous hydraulic cylinders are hinged to the lower side of the rear corner of the triangular support, and their hinge axes are horizontally arranged in the left-right direction. Two second telescopic synchronous hydraulic cylinders are arranged side by side on the left and right, with the front higher than the rear, and are inclined above the triangular support. The lower ends of the cylinder bodies of the two second telescopic synchronous hydraulic cylinders are hinged to the upper side of the rear corner of the triangular support, and their hinge axes are horizontally arranged in the left-right direction. The piston rods of the two second telescopic synchronous hydraulic cylinders extend forward and upward. The upper ends of the piston rods of the two second telescopic synchronous hydraulic cylinders are hinged to the middle of the rear side of the mast, and their hinge axes are horizontally arranged in the left-right direction. The mast is equipped with a wire rope lifting mechanism for hoisting the dual-axis soil breaking and mixing three-section drilling device. The hydraulic station is connected to each of the first telescopic synchronous hydraulic cylinders and each of the second telescopic synchronous hydraulic cylinders through hydraulic pipelines. The control panel is connected to each of the first telescopic synchronous hydraulic cylinders and each of the second telescopic synchronous hydraulic cylinders via signals. The three-section drill bit includes a drill shaft and a positioning drill tip. The upper end of the drill shaft is coaxially threaded to the lower end of the drill rod. The positioning drill tip is a tapered tip, wider at the top and narrower at the bottom, with its upper end welded to the lower end of the drill shaft. The drill shaft is a hollow shaft, and its inner bore corresponds vertically to the inner bore of the drill rod. The lower end of the central shaft of the drug delivery auger rotates at the lower end of the inner bore of the drill shaft. The outer circumference of the drill shaft is divided into three sections from bottom to top. Counting from bottom to top, the first section of the drill shaft has several circumferentially arrayed, spirally arranged digging helical blades along the axial direction on its outer circumference. The various drug discharge holes are arranged in a circumferential array on the outer circumference of the first section of the drill shaft. The digging helical blades and... The discharge holes are arranged at intervals in the circumferential direction. The lower edge of each digging spiral blade extends to the lower outer circle of the drill shaft. Each digging spiral blade has a bucket tooth on its lower edge. Transition spiral blades are spirally arranged axially on the outer circumference of the second section of the drill shaft. Mixing spiral blades are spirally arranged axially on the outer circumference of the third section of the drill shaft. The circumferential diameter of the outer circle of the digging spiral blade is larger than that of the outer circle of the transition spiral blade. The circumferential diameter of the outer circle of the transition spiral blade is larger than that of the outer circle of the mixing spiral blade. The length of the third section of the drill shaft is greater than the sum of the lengths of the first and second sections of the drill shaft.

2. The in-situ biaxial three-stage soil remediation device according to claim 1, characterized in that: The wire rope lifting mechanism includes a hydraulic winch fixed to the lower rear of the mast. A first fixed pulley, located above the hydraulic winch, is rotatably mounted on the upper rear of the mast. A crane head, horizontally positioned along the front-rear direction, is located at the upper end of the mast. The front end of the crane head has a front U-shaped groove that is open at both ends and open at the front, while the rear end has a rear U-shaped groove that is open at both ends and open at the rear. A second fixed pulley, located on the upper front side of the mast, is rotatably mounted within the front U-shaped groove, and a guide pulley, located directly above the first fixed pulley, is rotatably mounted within the rear U-shaped groove. The central shafts of the first fixed pulley, the second fixed pulley, and the guide groove pulley are all horizontally arranged in the left-right direction. The steel wire rope wound on the drum of the hydraulic winch extends upward and wraps around the rear side of the first fixed pulley and the upper rear part of the guide groove pulley in sequence. Then the steel wire rope extends horizontally forward and wraps around the upper front part of the second fixed pulley. After that, the steel wire rope extends vertically downward and is hoisted to the top of the dual-shaft soil breaking and mixing three-section drilling device. The hydraulic station is connected to the hydraulic motor of the hydraulic winch through hydraulic pipelines. The control panel is connected to the hydraulic motor control valve group of the hydraulic winch via signal.

3. The in-situ biaxial three-stage soil remediation device according to claim 2, characterized in that: The dual-axis soil breaking and mixing three-stage drilling device includes a chemical supply tank and two soil breaking drilling rig components. The two soil breaking drilling rig components have the same structure and are symmetrically installed on the front side of two masts respectively. The chemical supply tank is installed on the upper part of the two soil breaking drilling rig components. The soil breaking drill assembly on the left includes a fully hydraulic power head, drill rod, and a three-section drill bit. The fully hydraulic power head is vertically slidably connected to the front of the mast on the left. Both the drill rod and the three-section drill bit are vertically positioned. The upper end of the drill rod is coaxially connected to the lower end of the output shaft of the fully hydraulic power head, and the lower end of the drill rod is coaxially threaded to the upper end of the three-section drill bit. Both the drill rod and the three-section drill bit are hollow structures. A chemical auger conveyor is centrally located inside both the drill rod and the three-section drill bit. The hydraulic motor of the chemical auger conveyor is located at the upper end of the inner hole of the drill rod, and the central shaft of the chemical auger conveyor is centrally located inside the drill rod and the three-section drill bit. The lower end of the central shaft of the drug delivery auger rotates at the lower end of the inner hole of the three-section drill bit. The spiral blades of the drug delivery auger are spirally arranged along its central shaft. The conveying direction of the drug delivery auger is from top to bottom. Several circular arrays of discharge holes connected to the inside of the three-section drill bit are opened on the lower outer wall. The top of the fully hydraulic power head is hoisted and connected to the wire rope extension end of the hydraulic winch on the left. The hydraulic station is connected to the hydraulic motors of the fully hydraulic power head and the drug delivery auger through hydraulic pipelines. The control panel is connected to the hydraulic motors of the fully hydraulic power head and the drug delivery auger through signals. The medicine supply box is horizontally positioned, with a medicine addition cover on the front side plate. Two drill rods are vertically inserted through the medicine supply box. The top and bottom plates of the medicine supply box are rotatably connected to the two drill rods via sealed bearings. The medicine supply box contains two sealing sleeves spaced apart from each other. The upper and lower ends of the sealing sleeves are fixedly connected to the inner surfaces of the top and bottom plates of the medicine supply box, respectively. The two sealing sleeves are concentrically fitted onto the outside of the corresponding two drill rods. The inner diameter of the sealing sleeves is larger than the outer diameter of the drill rods. Several medicine supply holes are opened on the side walls of both sealing sleeves, and several medicine inlet holes located in the corresponding sealing sleeves are opened on the side walls of each drill rod.

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