A deep soil remediation device

Abstract

The application relates to the technical field of soil remediation, in particular to a deep-layer contaminated soil remediation device, which comprises a moving platform, a vertical driving assembly and a rotary driving assembly are arranged on the moving platform, a drill rod is in transmission connection with the vertical driving assembly and the rotary driving assembly, and an electric push rod is arranged in the interior of the drill rod; an agitating mechanism is in transmission connection with the electric push rod and is used for agitating and mixing deep-layer soil; the agitating mechanism comprises a fixing frame fixed to the inner wall of the drill rod, and four groups of agitating rods are hingedly connected to the bottom end of the fixing frame; the electric push rod pushes the moving rod to slide, drives the support to rotate, makes the four groups of agitating rods and the taper blocks overturn and unfold, cooperates with the drill rod to fully agitate and crush the deep-layer soil, makes the remediation liquid rapidly and uniformly contact the contaminated soil, improves the remediation effect, and solves the problem that the traditional device directly sprays the remediation liquid on the soil surface and cannot penetrate into the deep layer, thereby leading to poor remediation effect.

Description

Technical Field

[0001] This invention relates to the field of soil remediation technology, and more particularly to a device for remediating deep contaminated soil. Background Technology

[0002] With the continuous advancement of industrialization, soil pollution has become increasingly prominent. Among them, deep soil pollution, due to its strong concealment, difficulty in treatment, and long remediation cycle, has become a key bottleneck restricting the governance of soil ecological environment. The deep soil of sites left by heavily polluting industries such as chemical, electroplating, and smelting generally has problems such as heavy metals, organic matter, and compound pollution. This type of pollution not only damages the soil structure and leads to soil compaction and hardening, but may also harm the ecological environment and human health through groundwater infiltration and crop absorption. Therefore, the efficient remediation of deep polluted soil has become an urgent need and research focus in the field of soil remediation technology. Currently, soil remediation technologies mainly encompass four categories: physical remediation, chemical remediation, bioremediation, and combined remediation. Among these, in-situ remediation technology, due to its minimal site disturbance and low risk of secondary pollution, is gradually replacing traditional ex-situ treatment methods and becoming the mainstream approach for industrial contaminated site remediation. However, existing deep soil remediation equipment still suffers from numerous technical shortcomings in actual operation, making it difficult to meet the remediation needs of complex, deeply contaminated soils.

[0003] However, existing deep soil remediation equipment often sprays the remediation solution directly onto the soil surface during operation, relying on natural infiltration to allow the solution to reach the deep contaminated areas. This method results in extremely low infiltration efficiency, with most of the solution easily lost in the shallow soil and unable to fully contact the deep contaminated soil, leading to poor remediation effect and low remediation efficiency.

[0004] In view of this, we will study and improve upon the existing problems to provide a device for the remediation of deeply contaminated soil, aiming to solve the problems and improve its practical value through this technology. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and to propose a device for remediating deep contaminated soil.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a device for remediating deep contaminated soil, comprising a mobile platform, wherein the mobile platform is provided with a vertical drive component and a rotary drive component, wherein the vertical drive component and the rotary drive component are connected by a drill rod, and an electric push rod is installed inside the drill rod; A stirring mechanism, which is connected to an electric push rod for stirring and mixing deep soil, includes a fixed frame fixed to the inner wall of the drill rod, four sets of stirring rods hinged to the bottom of the fixed frame, a conical block at the end of each stirring rod, a vertically sliding moving rod on the fixed frame, a bracket hinged between the moving rod and the stirring rod, a spring A between the moving rod and the fixed frame, and a spray end on one side of each stirring rod. The protective mechanism includes a protective cylinder sleeved on the outer wall of the drill rod. The drill rod has a cavity A and a cavity B inside. The protective cylinder is slidably disposed in cavity A. A pull rope is connected between the protective cylinder and the electric push rod, and the pull rope slides along the surface of the rotating cylinder. A protective sleeve is provided in cavity B. Cavities A and B are connected by a through hole. An injection mechanism, comprising multiple sets of liquid storage components and a delivery assembly communicating with the liquid storage components, wherein the delivery assembly is communicating with the inside of the drill pipe and extends to the injection end; The detection mechanism is mounted on the base, and the drill rod is equipped with a displacement detection element. The displacement detection element is electrically connected to the vertical drive assembly, the injection mechanism, and the electric push rod.

[0007] Preferably, the vertical drive assembly includes a guide rail fixed to the moving platform, a threaded rod driven by motor A is rotatably provided inside the guide rail, and a base is threadedly connected to the outer wall of the threaded rod.

[0008] Preferably, the rotary drive assembly includes a motor B connected to a base, a turntable is rotatably mounted on the surface of the base via bearings, and a gear is fitted between the output end of the motor B and the outer wall of the turntable.

[0009] Preferably, the liquid storage component of the injection mechanism is a liquid storage tank containing three sets of repair solutions of different concentrations. The infusion assembly includes an infusion pipe A connected to the liquid storage tank. The infusion pipe A is connected to an infusion pipe B through a transition pipe. The infusion pipe B is connected to the spray end inside the drill rod through a connecting pipe. The spray end is a nozzle located on the outer wall of the stirring rod. The infusion pipe A is equipped with a first solenoid valve, and the liquid storage tank is equipped with a suction pump.

[0010] Preferably, the displacement detection component is a displacement sensor fixed to the base and a reflector located on the outer wall of the guide rail. The displacement sensor is a laser displacement sensor. The displacement sensor can output multiple control signals according to the displacement height of the drill rod to control the motion state of the vertical drive component, the opening and closing of the liquid storage component, and the extension and retraction stroke of the electric push rod.

[0011] Preferably, the detection mechanism includes a horizontal tube fixed to a base, an L-shaped tube connected to the outer wall of the horizontal tube, two sets of symmetrical clamping rods slidingly inside the horizontal tube, a spring B fixed between the two sets of clamping rods, a squeezing rod slidingly inside the L-shaped tube, a spring C between the squeezing rod and the inner wall of the L-shaped tube, a cam on the turntable intermittently abutting the squeezing rod, a gas supply pipe connected between the L-shaped tube and the infusion assembly, a second solenoid valve on the outer wall of the gas supply pipe, and a one-way solenoid valve on the horizontal tube.

[0012] Preferably, the protective sleeve is made of a flexible elastic material, the initial position of the protective cylinder completely blocks the nozzle, and the nozzle is fully exposed after the protective cylinder moves upward along cavity A.

[0013] Preferably, the outer wall of the stirring rod is uniformly provided with multiple sets of protruding teeth, the protruding teeth are triangular prisms, and the tips of the protruding teeth face away from the axis of the drill rod. The protruding teeth are integrally formed with the stirring rod.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a displacement sensor in conjunction with a reflector to monitor the drilling rod's descent height in real time. When the bottom of the drilling rod reaches the preset deep soil position, the displacement sensor simultaneously sends three control signals. The first signal controls motor A to reverse, driving the drilling rod to gradually rise from the deep layer to the shallow layer, entering the extraction and remediation stage. The second signal activates the storage tank suction pump and the first solenoid valve, allowing the remediation fluid to be transported through multiple pipelines to the inner cavity of the stirring rod and sprayed out through the nozzle. The displacement sensor automatically opens the storage tank with the appropriate concentration based on the drilling rod's descent height, ensuring that the remediation fluid concentration matches the degree of soil contamination. The third signal controls the electric push rod to push the moving rod to slide, causing the support to rotate, which in turn causes the four sets of stirring rods and cone blocks to flip and unfold. This, combined with the rotation of the drilling rod, fully agitates and breaks up the deep soil, allowing the remediation fluid to quickly and evenly contact the contaminated soil, improving the remediation effect and solving the problem of traditional equipment that directly sprays the remediation fluid onto the soil surface, failing to penetrate to the deep layers and resulting in poor remediation effects.

[0015] 2. This invention utilizes the drill rod reaching a preset deep soil position. After the displacement sensor sends a control signal to start the electric push rod, its output end moves downward and drives the pull rope to move downward synchronously. This pulls the protective sleeve upward along cavity A and retracts it into the interior, completely exposing the previously blocked nozzle. This prevents the nozzle from being blocked or worn by the soil during drilling, protecting the nozzle from damage. At the same time, as the protective sleeve moves upward, it compresses the gas in cavity A. The gas enters the drill rod cavity B through the through hole, increasing the air pressure inside the cavity. This, in turn, pushes the elastically expandable sheath in cavity B to expand, tightly adhering to the soil around the borehole to form a protective and fixed structure. This effectively prevents the borehole wall from being disturbed when the drill rod is pulled up, prevents soil from falling and blocking the borehole, and prevents burying the nozzle, thus effectively improving the efficiency and effect of deep soil remediation.

[0016] 3. This invention uses a cam to intermittently push the extrusion rod to move back and forth, creating negative pressure in the horizontal pipe and drawing in external gas. The gas is then transported to the nozzle through multiple pipelines. Workers can check for nozzle blockages by observing the gas ejection. Simultaneously, when the drill rod is lifted to spray the repair fluid, the cam continues to push the extrusion rod to move back and forth, causing the two sets of clamping rods to move in opposite directions, thus achieving reciprocating extrusion of the transition pipe. This generates pulse force within the pipeline, enhancing the penetration of the repair fluid and improving its infiltration effect in deep soil, ensuring that the repair fluid comes into full contact with the pollutants. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This is one of the cross-sectional structural diagrams of the drill pipe of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram of section A; Figure 5 This is a schematic diagram of the unfolded structure of the stirring rod of the present invention; Figure 6 This is a second schematic diagram of the cross-sectional structure of the drill pipe of the present invention; Figure 7 This is the third schematic diagram of the cross-sectional structure of the drill pipe of the present invention; Figure 8 This is a schematic diagram of the injection mechanism structure of the present invention; Figure 9 This is a schematic diagram of the detection mechanism structure of the present invention; Figure 10 For the present invention Figure 9 Enlarged structural diagram of section B.

[0018] Legend: 1. Moving platform; 2. Guide rail; 3. Threaded rod; 4. Base; 5. Turntable; 6. Drill rod; 71. Fixing frame; 72. Stirring rod; 73. Cone block; 74. Moving rod; 75. Spring A; 76. Bracket; 77. Raised tooth; 81. Protective cylinder; 82. Cavity A; 83. Cavity B; 84. Sheath; 85. Pull rope; 91. Storage tank; 92. Infusion tube A; 93. Transition tube; 94. Infusion tube B; 95. Connecting tube; 96. Displacement sensor; 97. Reflector; 101. Horizontal tube; 102. Clamping rod; 103. Spring B; 104. L-shaped tube; 105. Extrusion rod; 106. Spring C; 107. Gas inlet pipe; 108. Cam; 7. Motor A; 8. Motor B; 9. Gear; 10. Electric push rod; 11. Nozzle; 12. One-way solenoid valve. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] See Figures 1 to 10 As shown, the present invention provides a device for remediating deep contaminated soil, including a mobile platform 1, on which a vertical drive assembly and a rotary drive assembly are provided, and a drill rod 6 is connected to the vertical drive assembly and the rotary drive assembly. An electric push rod 10 is installed inside the drill rod 6. The stirring mechanism is connected to the electric push rod 10 for stirring and mixing deep soil. The stirring mechanism includes a fixed frame 71 fixed to the inner wall of the drill rod 6. Four sets of stirring rods 72 are hinged to the bottom end of the fixed frame 71. The ends of the stirring rods 72 are provided with cone blocks 73. A moving rod 74 slides vertically on the fixed frame 71. A bracket 76 is hinged between the moving rod 74 and the stirring rods 72. A spring A75 is provided between the moving rod 74 and the fixed frame 71. A spray end is provided on one side of the stirring rod 72. It should be noted that, for reference Figures 1 to 8 As shown, the mobile platform 1 is first moved above the soil area to be repaired, and motors A7 and B8 are started to work synchronously. Motor A7 drives the threaded rod 3 to rotate, which drives the base 4 to move downward along the guide rail 2, and then drives the turntable 5 and drill rod 6 to move downward synchronously. At the same time, motor B8 drives two sets of meshing gears 9 to rotate, which drives the turntable 5 and drill rod 6 to rotate synchronously. With the help of the combined motion of rotation and downward movement, the drill rod 6 can drill into the deep soil to be repaired. During the downward movement of drill rod 6, displacement sensor 96 on base 4, in conjunction with reflector 97, monitors the downward height of drill rod 6 in real time. When the bottom of drill rod 6 reaches the preset deep soil position, displacement sensor 96 simultaneously sends three control signals. The first control signal is transmitted to motor A7, controlling motor A7 to reverse and drive drill rod 6 to gradually rise from deep to shallow soil, entering the extraction and remediation stage. The second control signal is transmitted to the suction pump of storage tank 91 and the first solenoid valve on infusion pipe A92, allowing different concentrations of remediation solution to be injected into storage tank 91. The solution is delivered to the inner cavity of the stirring rod 72 through the infusion tube A92, transition tube 93, infusion tube B94 and connecting tube 95, and finally sprayed out through the nozzle 11 on the outer wall of the stirring rod 72, realizing the precise injection of remediation solution into the deep soil. As the drill rod 6 is gradually raised from the deep layer to the shallow layer, the displacement sensor 96 continuously monitors the raising height of the drill rod 6. When the drill rod 6 reaches different preset depth ranges, the corresponding depth range of the appropriate concentration of the storage tank 91 will be automatically controlled to open and deliver the remediation agent, ensuring that the concentration of the remediation solution matches the degree of pollution of the soil at different depths. The third control signal is transmitted to the electric push rod 10 inside the drill rod 6, which controls the output end of the electric push rod 10 to descend and push the moving rod 74 to slide down along the fixed frame 71. During the sliding process, the moving rod 74 drives the bracket 76 to rotate, which in turn drives the four sets of stirring rods 72 hinged on the fixed frame 71 and the cone block 73 at the end to flip and unfold synchronously. Through the rotation of multiple sets of stirring rods 72 in conjunction with the rotation of the drill rod 6, the deep soil is fully stirred and broken, so that the sprayed remediation fluid can quickly and evenly contact the contaminated soil, thereby improving the remediation effect. Furthermore, considering the differences in soil density and contamination levels at different depths—with greater density and lower contamination at deeper depths—when the displacement sensor 96 detects a preset position range during the upward lifting of the drill rod 6, it sends a control signal to control the electric push rod 10 to continue moving downwards a certain distance. This, in turn, pushes the stirring rod 72 to further expand the stirring range, adapting to the density of soil at different depths. This ensures that soil at all depths is adequately stirred and repaired, while also preventing hole wall disturbance and collapse in deep soil due to excessive stirring range, thus guaranteeing the smooth progress of the repair operation.

[0021] The protective mechanism includes a protective cylinder 81 sleeved on the outer wall of the drill rod 6. The drill rod 6 has cavities A82 and B83. The protective cylinder 81 is slidably disposed in the cavity A82. A pull rope 85 is connected between the protective cylinder 81 and the electric push rod 10, and the pull rope 85 slides along the surface of the rotating drum. A protective sleeve 84 is provided in the cavity B83. The cavities A82 and B83 are connected by a through hole. It should be noted that, for reference Figures 1 to 7As shown, in the initial state, the protective sleeve 81 fitted on the outer wall of the drill rod 6 is in the initial position, completely blocking the nozzle 11 on the outer wall of the stirring rod 72. This effectively prevents soil particles from entering or adhering to the surface of the nozzle 11 during the drilling process of the drill rod 6 into the deep soil, thus preventing the nozzle 11 from becoming clogged and ensuring the smooth spraying of the subsequent repair fluid. At the same time, when the drill rod 6 reaches the preset deep soil position, the displacement sensor 96 sends a control signal to control the electric push rod 10 to start. The output end of the electric push rod 10 moves downward, and at the same time, the output end of the electric push rod 10 drives the pull rope 85 to move downward synchronously. The pull rope 85 then pulls the protective sleeve 81, causing the protective sleeve 81 to move upward along the inside of the cavity A82. As the protective sleeve 81 moves upward, it gradually contracts into the inside of the cavity A82, and the nozzle 11, which was originally blocked, is completely exposed. This avoids the problem of the nozzle 11 being blocked or worn by the soil during the drilling process of the drill rod 6, effectively protecting the integrity of the nozzle 11. As the protective cylinder 81 moves upward along the interior of cavity A82, it compresses the gas inside cavity A82. The compressed gas enters cavity B83 inside drill rod 6 through the through hole between cavity A82 and cavity B83. As the gas continues to enter, the gas pressure inside cavity B83 increases continuously. The increased gas pressure continuously acts on the elastically expandable sheath 84 set inside cavity B83, causing sheath 84 to continuously expand. The expanded sheath 84 fits tightly against the soil around the borehole, forming an effective protective and fixing structure. This prevents the borehole wall from being disturbed during the lifting operation of drill rod 6, preventing soil from falling and blocking the borehole channel. It also prevents the fallen soil from burying the exposed nozzle 11, thus improving the efficiency and effect of deep soil remediation.

[0022] The injection mechanism includes multiple sets of liquid storage components and a liquid delivery assembly connected to the liquid storage components. The liquid delivery assembly is connected to the inside of the drill pipe 6 and extends to the injection end. The detection mechanism is located on the base 4, and the drill rod 6 is equipped with a displacement detection element. The displacement detection element is electrically connected to the vertical drive assembly, the injection mechanism, and the electric push rod 10.

[0023] In an optional embodiment, the vertical drive assembly includes a guide rail 2 fixed to the mobile platform 1, a threaded rod 3 driven by a motor A7 rotatably disposed within the guide rail 2, and a base 4 threadedly connected to the outer wall of the threaded rod 3.

[0024] In an optional embodiment, the rotary drive assembly includes a motor B8 connected to a base 4, a turntable 5 rotatably mounted on the surface of the base 4 via bearings, and a gear 9 fitted between the output end of the motor B8 and the outer wall of the turntable 5.

[0025] In an optional embodiment, the liquid storage component of the injection mechanism is a liquid storage tank 91 containing three sets of repair solutions of different concentrations. The infusion assembly includes an infusion pipe A92 connected to the liquid storage tank 91. The infusion pipe A92 is connected to an infusion pipe B94 through a transition pipe 93. The infusion pipe B94 is connected to the spray end inside the drill rod 6 through a connecting pipe 95. The spray end is a nozzle 11 located on the outer wall of the stirring rod 72. A first solenoid valve is provided on the infusion pipe A92, and a suction pump is provided on the liquid storage tank 91.

[0026] In an optional embodiment, the displacement detection components are a displacement sensor 96 fixed to the base 4 and a reflector 97 located on the outer wall of the guide rail 2. The displacement sensor 96 is a laser displacement sensor. The displacement sensor 96 can output multiple control signals according to the displacement height of the drill rod 6 to control the motion state of the vertical drive component, the opening and closing of the liquid storage component, and the extension and retraction stroke of the electric push rod 10.

[0027] In an optional embodiment, the detection mechanism includes a horizontal tube 101 fixed to the base 4, an L-shaped tube 104 connected to the outer wall of the horizontal tube 101, two sets of symmetrical clamping rods 102 slidably disposed inside the horizontal tube 101, a spring B103 fixed between the two sets of clamping rods 102, a squeezing rod 105 slidably disposed inside the L-shaped tube 104, a spring C106 disposed between the squeezing rod 105 and the inner wall of the L-shaped tube 104, a cam 108 intermittently abutting the squeezing rod 105 on the turntable 5, a gas delivery pipe 107 connected between the L-shaped tube 104 and the infusion assembly, a second solenoid valve disposed on the outer wall of the gas delivery pipe 107, and a one-way solenoid valve 12 disposed on the horizontal tube 101.

[0028] In an optional embodiment, the sheath 84 is made of a flexible elastic material, the initial position of the protective cylinder 81 completely blocks the nozzle 11, and the nozzle 11 is fully exposed after the protective cylinder 81 moves upward along the cavity A82.

[0029] It should be noted that, for reference Figures 9 to 10As shown, before the drill rod 6 drills into the soil, the operator first controls the electric push rod 10 to start. After the electric push rod 10 starts, it drives the pull rope 85 to move synchronously. The pull rope 85 then pulls the protective cylinder 81 to move, causing the protective cylinder 81 to retract into the cavity A82, thereby completely exposing the nozzle 11 on the outer wall of the stirring rod 72. Then, the operator controls the motor B8 to start and opens the second solenoid valve on the outer wall of the air supply pipe 107. After the motor B8 starts, it drives two sets of meshing gears 9 to rotate, which drives the turntable 5 to rotate synchronously. When the turntable 5 rotates, it drives the cam 108 to rotate synchronously. Under the elastic action of the spring C106, the cam 108 intermittently pushes... The squeezing rod 105 moves back and forth inside the L-shaped tube 104. The reciprocating motion of the squeezing rod 105 creates a negative pressure inside the horizontal tube 101. At the same time, under the action of the one-way solenoid valve 12 on the horizontal tube 101, the outside gas is drawn into the horizontal tube 101. The gas entering the horizontal tube 101 is then transported through the L-shaped tube 104 and the gas delivery tube 107 to the infusion tube A92, the transition tube 93, and the infusion tube B94 in sequence. At this time, the staff can visually detect whether the nozzle 11 is blocked by observing whether gas is sprayed out. They can then promptly troubleshoot the nozzle 11 and avoid the nozzle 11 being blocked, thus preventing the repair fluid from being sprayed out during subsequent repair work. Furthermore, when the drill rod 6 completes deep soil agitation and is lifted upwards while spraying the remediation fluid, the second solenoid valve on the outer wall of the gas supply pipe 107 and the one-way solenoid valve 12 on the horizontal pipe 101 are both closed. The turntable 5 continues to drive the cam 108 to intermittently push the extrusion rod 105 to reciprocate along the inside of the L-shaped pipe 104. During the reciprocating movement, the extrusion rod 105 extrudes the inner cavity of the L-shaped pipe 104 and the horizontal pipe 101, causing the gas pressure inside the horizontal pipe 101 to continuously increase. The increased gas pressure pushes the two sets of symmetrically arranged clamping rods 102 inside the horizontal pipe 101 to move in opposite directions. At the same time, the two sets of clamping rods... The spring B103 between the rods 102 is compressed. When the cam 108 rotates to a position where it no longer abuts against the extrusion rod 105, the elastic restoring force of the spring B103 pushes the two sets of clamping rods 102 to reset. This cycle repeats, achieving reciprocating extrusion of the transition tube 93 by the two sets of clamping rods 102. Through the reciprocating extrusion action, pulse force is generated inside the infusion tube A92, infusion tube B94, and connecting tube 95. The pulse force acts on the remediation fluid, making the remediation fluid sprayed from the nozzle 11 more penetrating, thereby effectively improving the penetration effect of the remediation fluid in deep soil and ensuring that the remediation fluid can penetrate deep into the soil and fully contact the pollutants.

[0030] In an optional embodiment, the outer wall of the stirring rod 72 is uniformly provided with multiple sets of protruding teeth 77. The protruding teeth 77 have a triangular prism structure, and the tips of the protruding teeth 77 face the side away from the axis of the drill rod 6. The protruding teeth 77 are integrally formed with the stirring rod 72. The protruding teeth 77 enhance the cutting and breaking ability of the stirring rod 72 on deep soil, increase the contact friction with the soil, make the stirring more thorough, promote the rapid and uniform mixing of the remediation liquid and the contaminated soil, and improve the stirring efficiency, further enhancing the remediation effect of deep soil.

[0031] Working principle: It should be noted that, firstly, the mobile platform 1 is moved above the area of ​​soil to be repaired, and motors A7 and B8 are started to work synchronously. Motor A7 drives the threaded rod 3 to rotate, which drives the base 4 to move downward along the guide rail 2, thereby driving the turntable 5 and drill rod 6 to move downward synchronously. At the same time, motor B8 drives two sets of meshing gears 9 to rotate, which drives the turntable 5 and drill rod 6 to rotate synchronously, so that the drill rod 6 can drill into the deep soil to be repaired. During the downward movement of drill rod 6, displacement sensor 96 on base 4, in conjunction with reflector 97, sends three control signals simultaneously when the bottom of drill rod 6 reaches the preset deep soil position. The first control signal is transmitted to motor A7, which reverses motor A7, driving drill rod 6 to gradually rise from deep to shallow soil, entering the extraction and repair stage. The second control signal is transmitted to the suction pump of storage tank 91 and the first solenoid valve on infusion pipe A92, so that repair fluid of different concentrations in storage tank 91 is delivered to the inner cavity of stirring rod 72 through infusion pipe A92, transition pipe 93, infusion pipe B94 and connecting pipe 95, and finally sprayed out through nozzle 11 on the outer wall of stirring rod 72. The third control signal is transmitted to the electric push rod 10 inside the drill rod 6, which controls the output end of the electric push rod 10 to descend and push the moving rod 74 to slide down along the fixed frame 71. During the sliding process, the moving rod 74 drives the support 76 to rotate, which in turn drives the four sets of stirring rods 72 hinged on the fixed frame 71 and the cone block 73 at the end to flip and unfold synchronously. Through the rotation of multiple sets of stirring rods 72 in conjunction with the rotation of the drill rod 6, the deep soil is fully stirred and broken. In the initial state, the protective cylinder 81 fitted on the outer wall of the drill rod 6 is in the initial position, completely blocking the nozzle 11 on the outer wall of the stirring rod 72. At the same time, when the drill rod 6 reaches the preset deep soil position, the displacement sensor 96 sends a control signal to control the electric push rod 10 to start. The output end of the electric push rod 10 moves downward. At the same time, the output end of the electric push rod 10 drives the pull rope 85 to move downward synchronously. The pull rope 85 then pulls the protective cylinder 81, causing the protective cylinder 81 to move upward along the inside of the cavity A82. As the protective cylinder 81 moves upward, it gradually contracts into the inside of the cavity A82, and the nozzle 11 that was originally blocked is completely exposed. As the protective cylinder 81 moves upward along the inside of cavity A82, it will compress the gas inside cavity A82. The compressed gas enters cavity B83 inside drill rod 6 through the through hole between cavity A82 and cavity B83. As the gas continues to enter, the gas pressure inside cavity B83 increases continuously. The increased gas pressure continues to act on the protective sleeve 84 set inside cavity B83, causing the protective sleeve 84 to expand continuously. The expanded protective sleeve 84 fits tightly against the soil around the borehole, forming an effective protective and fixing structure. Before drill rod 6 penetrates the soil, the operator first starts the electric push rod 10. After starting, the electric push rod 10 moves the pull rope 85 synchronously, which in turn pulls the protective cylinder 81, causing it to retract into the cavity A82, thus completely exposing the nozzle 11 on the outer wall of the stirring rod 72. Then, the operator starts the motor B8 and opens the second solenoid valve on the outer wall of the air supply pipe 107. After starting, motor B8 drives two sets of meshing gears 9 to rotate, causing the turntable 5 to rotate synchronously. The rotation of the turntable 5 causes the cam 108 to rotate synchronously. 108 intermittently pushes the squeezing rod 105 to reciprocate along the inside of the L-shaped tube 104. The reciprocating motion of the squeezing rod 105 creates a negative pressure inside the horizontal tube 101. At the same time, under the action of the one-way solenoid valve 12 on the horizontal tube 101, the outside gas is drawn into the horizontal tube 101. The gas entering the horizontal tube 101 is then transported through the L-shaped tube 104 and the gas delivery tube 107 to the infusion tube A92, the transition tube 93, and the infusion tube B94 in sequence. At this time, the staff can visually detect whether the nozzle 11 is blocked by observing whether gas is sprayed out. Furthermore, when the drill rod 6 completes deep soil agitation and is lifted upwards while spraying the remediation fluid, the second solenoid valve on the outer wall of the gas delivery pipe 107 and the one-way solenoid valve 12 on the horizontal pipe 101 are both closed. The turntable 5 continues to drive the cam 108 to intermittently push the extrusion rod 105 to reciprocate along the inside of the L-shaped pipe 104. During the reciprocating movement, the extrusion rod 105 extrudes the inner cavity of the L-shaped pipe 104 and the horizontal pipe 101, causing the gas pressure inside the horizontal pipe 101 to continuously increase. The high gas pressure drives two sets of symmetrically arranged clamping rods 102 inside the horizontal tube 101 to move in opposite directions. At the same time, the spring B103 between the two sets of clamping rods 102 is compressed. When the cam 108 rotates to the point where it no longer abuts against the extrusion rod 105, the elastic restoring force of the spring B103 pushes the two sets of clamping rods 102 to reset. This cycle is repeated to achieve the reciprocating extrusion of the two sets of clamping rods 102 onto the transition tube 93. The reciprocating extrusion action generates pulse force inside the infusion tube A92, infusion tube B94, and connecting tube 95.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for remediating deep contaminated soil, characterized in that, The system includes a mobile platform (1), on which a vertical drive assembly and a rotary drive assembly are provided. The vertical drive assembly and the rotary drive assembly are connected to a drill rod (6), and an electric push rod (10) is installed inside the drill rod (6). A stirring mechanism is connected to an electric push rod (10) for stirring and mixing deep soil. The stirring mechanism includes a fixed frame (71) fixed to the inner wall of the drill rod (6). Four sets of stirring rods (72) are hinged to the bottom of the fixed frame (71). A cone block (73) is provided at the end of the stirring rod (72). A moving rod (74) slides vertically on the fixed frame (71). A bracket (76) is hinged between the moving rod (74) and the stirring rod (72). A spring A (75) is provided between the moving rod (74) and the fixed frame (71). A spray end is provided on one side of the stirring rod (72). The protective mechanism includes a protective cylinder (81) sleeved on the outer wall of the drill rod (6). The drill rod (6) has a cavity A (82) and a cavity B (83) inside. The protective cylinder (81) is slidably disposed in the cavity A (82). A pull rope (85) is connected between the protective cylinder (81) and the electric push rod (10), and the pull rope (85) slides along the surface of the rotating cylinder. A protective sleeve (84) is provided in the cavity B (83). The cavity A (82) and the cavity B (83) are connected by a through hole. The injection mechanism includes multiple sets of liquid storage components and a delivery assembly connected to the liquid storage components. The delivery assembly is connected to the inside of the drill pipe (6) and extends to the injection end. The detection mechanism is located on the base (4), and the drill rod (6) is provided with a displacement detection element. The displacement detection element is electrically connected to the vertical drive assembly, the injection mechanism and the electric push rod (10).

2. The remediation equipment for deep contaminated soil according to claim 1, characterized in that, The vertical drive assembly includes a guide rail (2) fixed to the mobile platform (1), and a threaded rod (3) driven by a motor A (7) is rotatably provided inside the guide rail (2). The outer wall of the threaded rod (3) is threadedly connected to a base (4).

3. The remediation equipment for deep contaminated soil according to claim 1, characterized in that, The rotary drive assembly includes a motor B (8) connected to the base (4). The surface of the base (4) is provided with a turntable (5) which rotates through a bearing. The output end of the motor B (8) is fitted with a gear (9) on the outer wall of the turntable (5).

4. The remediation equipment for deep contaminated soil according to claim 1, characterized in that, The liquid storage component of the injection mechanism is a liquid storage tank (91) containing three sets of repair liquids of different concentrations. The infusion assembly includes an infusion pipe A (92) connected to the liquid storage tank (91). The infusion pipe A (92) is connected to an infusion pipe B (94) through a transition pipe (93). The infusion pipe B (94) is connected to the spray end inside the drill rod (6) through a connecting pipe (95). The spray end is a nozzle (11) located on the outer wall of the stirring rod (72). The infusion pipe A (92) is equipped with a first solenoid valve. The liquid storage tank (91) is equipped with a suction pump.

5. The remediation equipment for deep contaminated soil according to claim 1, characterized in that, The displacement detection components are a displacement sensor (96) fixed on the base (4) and a reflector 97 located on the outer wall of the guide rail 2. The displacement sensor (96) is a laser displacement sensor. The displacement sensor (96) can output multiple control signals according to the displacement height of the drill rod (6) to control the motion state of the vertical drive component, the opening and closing of the liquid storage component and the extension and retraction stroke of the electric push rod (10).

6. The remediation equipment for deep contaminated soil according to claim 1, characterized in that, The detection mechanism includes a horizontal tube (101) fixed to the base (4), an L-shaped tube (104) connected to the outer wall of the horizontal tube (101), two sets of symmetrical clamping rods (102) slidably arranged inside the horizontal tube (101), a spring B (103) fixed between the two sets of clamping rods (102), a squeezing rod (105) slidably arranged inside the L-shaped tube (104), a spring C (106) between the squeezing rod (105) and the inner wall of the L-shaped tube (104), a cam (108) intermittently abutting the squeezing rod (105) on the turntable (5), a gas delivery tube (107) connected between the L-shaped tube (104) and the infusion assembly, a second solenoid valve on the outer wall of the gas delivery tube (107), and a one-way solenoid valve (12) on the horizontal tube (101).

7. The remediation equipment for deep contaminated soil according to claim 4, characterized in that, The sheath (84) is made of a flexible elastic material. The initial position of the protective cylinder (81) completely blocks the nozzle (11). After the protective cylinder (81) moves upward along the cavity A (82), the nozzle (11) is completely exposed.

8. The remediation equipment for deep contaminated soil according to claim 1, characterized in that, The outer wall of the stirring rod (72) is uniformly provided with multiple sets of protruding teeth (77). The protruding teeth (77) are triangular prisms, and the tips of the protruding teeth (77) face away from the axis of the drill rod (6). The protruding teeth (77) and the stirring rod (72) are integrally formed.

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