A soil remediation agent dispensing device

Abstract

This invention relates to the field of soil remediation technology and discloses a soil remediation agent dispensing device, including a mounting frame and a connecting frame. The connecting frame is fixed to the back of the mounting frame. The device also includes a drill rod, a drill bit, and a friction misalignment component. The bottom outer wall of the drill rod has an annular groove, and the top inner wall of the drill bit has an annular slider fixedly installed, the annular slider slidingly engaging with the annular groove. The friction misalignment component includes a misalignment groove circumferentially arranged at the bottom of the drill rod, a rotating rod rotatably disposed within the misalignment groove, the bottom end of the rotating rod being fixedly connected to the drill bit, and a rotating block circumferentially disposed on the outer wall of the rotating rod slidingly engaging with the misalignment groove. An elastic element is assembled within the misalignment groove. This invention abandons the active protection structure of the hydraulically or electrically driven protective cover used in traditional technologies, eliminating the need for additional control pipelines, power components, and supporting electrical control systems, significantly simplifying the overall structure of the device, and possessing extremely high engineering application and promotional value.

Description

Technical Field

[0001] This invention relates to the field of soil remediation technology, specifically to a soil remediation agent dispensing device. Background Technology

[0002] In soil in-situ remediation technology, the method of drilling into contaminated soil layers and injecting remediation agents under high pressure is widely used due to its high construction efficiency and minimal site disturbance. This type of method usually uses a hollow drill rod with a drill bit at the bottom and injection nozzles arranged around the drill bit. During construction, the drill bit is driven by a power source to drill into the ground. After reaching the predetermined depth, the remediation agent is transported to the drill bit through the inner cavity of the drill rod by a high-pressure pump, and then sprayed into the surrounding soil through the injection nozzles to achieve oxidation, reduction or stabilization treatment of pollutants.

[0003] However, during the drilling process, the surrounding soil continuously squeezes and rushes into the nozzle, which can easily cause blockage and severely hinder the delivery of subsequent chemicals, significantly affecting the continuity of construction and the repair effect. Therefore, some existing technologies have installed a movable protective cover on the outside of the drill bit, such as by hydraulic or motor-driven opening and closing of the protective cover. However, this requires additional control pipelines or power components, which complicates the drill bit structure, increases the cost of equipment processing, assembly and maintenance, and has many drawbacks.

[0004] To address the problems mentioned above, those skilled in the art have proposed a soil remediation agent dispensing device. Summary of the Invention

[0005] The purpose of this invention is to provide a soil remediation agent dispensing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A soil remediation agent dispensing device includes a mounting frame and a connecting frame, wherein the connecting frame is fixedly installed on the back of the mounting frame, and further includes: a drill rod, a drill bit, and a friction misalignment component;

[0008] The bottom outer wall of the drill rod is provided with an annular groove, and the top inner wall of the drill bit is fixedly provided with an annular slider. The annular slider slides in conjunction with the annular groove, so that the drill bit rotates and is sleeved on the outside of the bottom of the drill rod. The bottom of the drill rod is provided with a liquid spraying port in the circumferential direction, and the top of the drill bit is provided with a through hole in the circumferential direction that matches the liquid spraying port.

[0009] The friction misalignment component includes a misalignment groove formed at the bottom of the drill rod and arranged circumferentially. A rotating rod is rotatably arranged in the misalignment groove. The bottom end of the rotating rod is fixedly connected to the drill bit. A rotating block that slides with the misalignment groove is arranged circumferentially on the outer wall of the rotating rod. An elastic element is assembled in the misalignment groove and is fixedly connected to the rotating block.

[0010] During drilling, the drill bit contacts the soil and is limited by soil friction. In the initial stage of rotation, the drill rod rotates circumferentially relative to the drill bit and deforms the elastic element, causing the through hole of the drill bit and the injection port of the drill rod to be misaligned and blocked. When the drill rod rotates to the limit position, the friction misalignment component drives the drill bit to rotate synchronously and drill. After drilling to the set depth, the drill rod stops rotating, and the drill bit rotates back to its original position relative to the drill rod under its own rotational inertia and the reset force of the elastic element, so that the through hole and the injection port are re-aligned and connected, realizing the spraying of the repair agent.

[0011] As a preferred embodiment of the present invention, the elastic element includes an arc-shaped limiting cylinder fixedly installed inside the misalignment groove, a limiting block slidably assembled inside the arc-shaped limiting cylinder, and an arc-shaped frame fixedly connected between the limiting block and the rotating block; a first spring is fixedly installed on the inner wall of the arc-shaped limiting cylinder on the side away from the rotating block, and the other end of the first spring is fixedly connected to the limiting block.

[0012] As a preferred embodiment of the present invention, it further includes a lifting component, which includes a lifting frame and two symmetrically arranged hydraulic rods. The two hydraulic rods are fixedly connected between the mounting frame and the lifting frame. Two symmetrically arranged limiting rods are fixed on the mounting frame, and the limiting rods are slidably engaged with the lifting frame. A rotating groove is provided in the middle of the lifting frame, and a rotating ring is fixedly installed on the outer wall of the drill rod. The rotating ring is rotatably engaged with the rotating groove, so that the drill rod is vertically rotated and assembled on the lifting frame.

[0013] As a preferred embodiment of the present invention, a conveying channel is provided at the top of the drill rod, and a plurality of diversion holes are provided circumferentially at the bottom of the conveying channel. A diversion pipe is provided between the diversion holes and the injection port. A liquid storage tank is installed at the top of the mounting frame, and a high-pressure pump is connected to the bottom of the liquid storage tank. A conveying pipe is connected to the output end of the high-pressure pump, and a rotating connector is connected to the end of the conveying pipe. The rotating connector is rotatably and sealingly connected to the conveying channel at the top of the drill rod. A support frame is fixed on the lifting frame, and the support frame is fixedly assembled with the rotating connector.

[0014] As a preferred embodiment of the present invention, it further includes an elastic valve component, which includes a fixed cylinder and a sealing ring. The outer wall of the fixed cylinder is circumferentially provided with a bracket that is fixedly connected to the inner wall of the diversion pipe. The sealing ring is installed inside the spray nozzle. A movable block is slidably arranged inside the fixed cylinder. A movable rod that slides and cooperates with the fixed cylinder is installed on the movable block. A sealing plate that cooperates with the sealing ring is installed at the end of the movable rod away from the movable block. A second spring that is fixedly connected to the movable block is provided on the inner wall of the fixed cylinder near the sealing plate.

[0015] As a preferred embodiment of the present invention, a motor is installed on the lifting frame, and a second gear and a first gear are respectively installed on the output shaft of the motor and the outer wall of the drill rod, with the first gear and the second gear meshing with each other.

[0016] As a preferred embodiment of the present invention, the conical outer wall of the drill bit is provided with a plurality of protrusions.

[0017] The present invention has the following advantages:

[0018] During operation, this invention utilizes the natural friction generated by the contact between the drill bit and the soil as a trigger. In the initial stage of drilling, the relative circumferential rotation of the drill rod and drill bit automatically achieves misalignment and sealing of the injection port and through-hole, keeping the injection port closed throughout the drilling process. This effectively prevents soil, sand, and mud from flowing into the injection port and internal distribution channels, fundamentally avoiding problems such as injection port blockage and channel siltation. Furthermore, after the drill bit reaches the preset contamination depth and the drill rod stops rotating, the drill bit's own rotational inertia and the elastic restoring effect of the elastic components allow the drill bit to automatically rotate back relative to the drill rod, achieving precise alignment and connection between the through-hole and the injection port. This effectively avoids the problems of shallow agent leakage and random spraying during drilling and lifting using traditional equipment, significantly improving agent utilization. This invention abandons the active protection structure of hydraulic and motor-driven protective covers used in traditional technologies, eliminating the need for additional control pipelines, power components, and supporting electrical control systems. It greatly simplifies the overall structure of the device and possesses extremely high engineering application and promotional value. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a soil remediation agent dispensing device.

[0020] Figure 2 This is a cross-sectional schematic diagram of the drill rod and drill bit in a soil remediation agent dispensing device.

[0021] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0022] Figure 4 This is a schematic diagram of the structure of a friction misalignment component in a soil remediation agent dispensing device.

[0023] Figure 5 This is a plan view of a friction misalignment component in a soil remediation agent dispensing device.

[0024] Figure 6 for Figure 3 A magnified view of a section at point B.

[0025] Figure 7 This is a cross-sectional schematic diagram of an elastic valve component in a soil remediation agent dispensing device.

[0026] Figure 8 This is a schematic diagram of the structure for delivering remediation agents in a soil remediation agent dispensing device.

[0027] Figure 9 This is a schematic diagram of the structure that drives the drill rod to rotate in a soil remediation agent dispensing device.

[0028] In the diagram: 110, mounting bracket; 120, connecting bracket; 210, drill rod; 220, spray nozzle; 230, drill bit; 231, protrusion; 240, annular groove; 250, annular slider; 260, through hole; 3, friction misalignment component; 310, rotating rod; 320, rotating block; 330, misalignment groove; 340, arc-shaped limiting cylinder; 350, limiting block; 360, arc-shaped frame; 370, first spring; 4, lifting component; 410, lifting frame; 420, rotating groove; 430, rotating ring; 4 40. Limiting rod; 450. Hydraulic rod; 510. Conveying channel; 520. Diverting hole; 530. Diverting pipe; 6. Flexible valve component; 610. Bracket; 620. Fixed cylinder; 630. Movable block; 640. Movable rod; 650. Sealing plate; 660. Second spring; 670. Sealing ring; 710. Support frame; 720. Rotary connector; 730. Conveying pipe; 740. High-pressure pump; 750. Liquid storage tank; 810. First gear; 820. Second gear; 830. Motor. Detailed Implementation

[0029] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0030] Please see Figures 1-9 A soil remediation agent dispensing device includes a mounting frame 110 and a connecting frame 120. The connecting frame 120 is fixedly installed on the back of the mounting frame 110. The connecting frame 120 is used for quick docking and assembly with external traction equipment, which can realize the traction and displacement of the whole machine and the site transfer. It also includes a drill rod 210, a drill bit 230 and a friction misalignment component 3.

[0031] The bottom outer wall of the drill rod 210 is provided with an annular groove 240, and the top inner wall of the drill bit 230 is fixedly provided with an annular slider 250. The annular slider 250 slides with the annular groove 240, so that the drill bit 230 is rotated and sleeved on the bottom outer side of the drill rod 210. The bottom of the drill rod 210 is provided with a liquid spraying port 220, and the top of the drill bit 230 is provided with a through hole 260 that matches the liquid spraying port 220.

[0032] The friction misalignment component 3 includes a misalignment groove 330 formed at the bottom of the drill rod 210 and arranged circumferentially. A rotating rod 310 is rotatably arranged in the misalignment groove 330. The bottom end of the rotating rod 310 is fixedly connected to the drill bit 230. A rotating block 320 is circumferentially arranged on the outer wall of the rotating rod 310 and slides with the misalignment groove 330. An elastic element is assembled in the misalignment groove 330 and is fixedly connected to the rotating block 320.

[0033] During drilling, the drill bit 230 comes into contact with the soil and is limited by soil friction. In the initial stage of rotation, the drill rod 210 rotates circumferentially relative to the drill bit 230 and deforms the elastic element, causing the through hole 260 of the drill bit 230 and the injection port 220 of the drill rod 210 to be misaligned and blocked. When the drill rod 210 rotates to its limit position, the friction misalignment component 3 drives the drill bit 230 to rotate synchronously and drill. After drilling to the set depth, the drill rod 210 stops rotating, and the drill bit 230 rotates back to its original position relative to the drill rod 210 under its own rotational inertia and the reset force of the elastic element, so that the through hole 260 and the injection port 220 are re-aligned and connected, realizing the spraying of the repair agent.

[0034] Please see Figure 4 and Figure 5 In one embodiment, the elastic element includes an arc-shaped limiting cylinder 340 fixedly installed inside the misalignment groove 330. A limiting block 350 is slidably assembled inside the arc-shaped limiting cylinder 340. An arc-shaped frame 360 ​​is fixedly connected between the limiting block 350 and the rotating block 320. A first spring 370 is fixedly installed on the inner wall of the arc-shaped limiting cylinder 340 away from the rotating block 320. The other end of the first spring 370 is fixedly connected to the limiting block 350.

[0035] In the initial state, due to the elastic force exerted by the first spring 370 on the limiting block 350, the limiting block 350 is located on the inner wall of the arc-shaped limiting cylinder 340 near the rotating block 320.

[0036] During drilling, the drill bit 230 contacts the soil, and the drill rod 210 is driven to rotate. Due to the resistance of soil friction, the drill bit 230 does not rotate temporarily, and the rotating rod 310 and rotating block 320 are in a fixed state. The drill rod 210 will circumferentially deflect relative to the drill bit 230. The misalignment groove 330 rotates together with the drill rod 210, and drives the arc-shaped limiting cylinder 340 to move synchronously through the groove wall. In conjunction with the rotating block 320 and the arc-shaped frame 360, the limiting block 350 slides relative to the arc-shaped limiting cylinder 340, and forces the first spring 370 to undergo elastic deformation and accumulate elastic force. When the relative twist reaches the limit position (that is, the arc-shaped frame 360 ​​is completely inserted into the arc-shaped limiting cylinder 340, and the rotating block 320 abuts against the arc-shaped limiting cylinder 340), the drill rod 210 abuts against the rotating block 320 through the groove, thereby driving the drill bit 230 and the rotating rod 310 to rotate synchronously and complete the normal drilling.

[0037] When the drill rod 210 stops rotating, the external constraint disappears, the deformed first spring 370 releases its elastic force, and together with the rotational inertia of the drill bit 230, it drives the rotating rod 310 to rotate, causing the rotating block 320 to slide in the misalignment groove 330 until it is reset, and finally the drill bit 230 returns to the initial angle, the spray nozzle 220 and the through hole 260 are realigned, the agent channel is opened, and the agent can then be injected into the soil.

[0038] Please see Figure 1 and Figure 9 In one embodiment, the system further includes a lifting component 4, which includes a lifting frame 410 and two symmetrically arranged hydraulic rods 450. The two hydraulic rods 450 are fixedly connected between the mounting frame 110 and the lifting frame 410. Two symmetrically arranged limiting rods 440 are fixed on the mounting frame 110, and the limiting rods 440 slide in cooperation with the lifting frame 410. A rotating groove 420 is provided in the middle of the lifting frame 410, and a rotating ring 430 is fixedly installed on the outer wall of the drill rod 210. The rotating ring 430 rotates in cooperation with the rotating groove 420, so that the drill rod 210 is vertically rotated and assembled on the lifting frame 410.

[0039] Specifically, after the equipment is moved to the work site, the hydraulic rod 450 is in a retracted state, and the lifting frame 410, along with the drill rod 210 and drill bit 230, remains at a high position, completing the overall alignment. The hydraulic rod 450 extends synchronously, pushing the lifting frame 410 to slide vertically downward along the limit rod 440. The limit rod 440 guides the lifting frame 410 throughout its movement, preventing it from shifting or swaying. The lifting frame 410 moves the drill rod 210 and drill bit 230 downward together until the drill bit 230 contacts the soil, cooperating with the rotation of the drill rod 210 to complete the drilling operation until the set depth is reached. After reaching the target depth, the hydraulic rod 450 stops moving, the lifting frame 410 remains stationary, the drill rod 210 stops rotating, and the chemical spraying operation begins. After the chemical is injected, the hydraulic rod 450 retracts synchronously, pulling the lifting frame 410 to slide upward along the limit rod 440, causing the drill rod 210 and drill bit 230 to be lifted off the soil as a whole until they return to the initial high position.

[0040] Please see Figure 2 , Figure 3 and Figure 8In one embodiment, the top of the drill rod 210 is provided with a conveying channel 510, and the bottom of the conveying channel 510 is provided with a plurality of diversion holes 520. A diversion pipe 530 is provided between the diversion holes 520 and the spray nozzle 220. A liquid storage tank 750 is installed on the top of the mounting frame 110 for storing repair agents. A high-pressure pump 740 is connected to the bottom of the liquid storage tank 750. The output end of the high-pressure pump 740 is connected to a conveying pipe 730. A rotating connector 720 is connected to the end of the conveying pipe 730. The rotating connector 720 is rotatably and sealingly connected to the conveying channel 510 at the top of the drill rod 210. A support frame 710 is fixed on the lifting frame 410. The support frame 710 and the rotating connector 720 are fixedly assembled.

[0041] Specifically, the storage tank 750 stores and temporarily holds the agent. During construction, the high-pressure pump 740 is started to extract the agent from the storage tank 750 and pressurize it for delivery. The pressurized agent enters the fixed rotating connector 720 through the delivery pipe 730 and then enters the delivery channel 510 at the top of the drill rod 210. The drill rod 210 rotates continuously during operation, and the rotating connector 720 and the top of the drill rod 210 always maintain a dynamic seal to prevent leakage. The agent flows down along the delivery channel 510 and is evenly distributed through multiple circumferentially arranged diversion holes 520 at the bottom. It is then independently delivered to the corresponding spray nozzle 220 through each diversion pipe 530. Finally, the agent is sprayed out from the spray nozzle 220 of the drill rod 210 and the through hole 260 of the drill bit 230, achieving circumferentially uniform, stable, and high-pressure agent injection.

[0042] Please see Figure 2 , Figure 3 , Figure 4 and Figure 7 In one embodiment, the device further includes an elastic valve component 6, which includes a fixed cylinder 620 and a sealing ring 670. The outer wall of the fixed cylinder 620 is circumferentially provided with a bracket 610 that is fixedly connected to the inner wall of the diversion pipe 530. The sealing ring 670 is installed inside the spray nozzle 220. A movable block 630 is slidably provided inside the fixed cylinder 620. A movable rod 640 that slides with the fixed cylinder 620 is installed on the movable block 630. A sealing plate 650 that cooperates with the sealing ring 670 is installed at the end of the movable rod 640 away from the movable block 630. A second spring 660 that is fixedly connected to the movable block 630 is provided on the inner wall of the fixed cylinder 620 near the sealing plate 650.

[0043] During drilling operations and shutdown, the elastic force of the second spring 660 is applied to the movable block 630, so that the sealing plate 650 at the end of the movable rod 640 can tightly fit the sealing ring 670, thereby sealing the inside of the injection port 220. This effectively prevents external soil, mud, and groundwater from flowing back into the diversion pipe 530 and the drill rod 210, thus preventing the injection port 220 from becoming clogged.

[0044] During high-pressure spraying, the high-pressure agent creates pressure in the diversion pipe 530, pushing the sealing plate 650 to separate from the sealing ring 670. The movable rod 640 drives the movable block 630 to compress the second spring 660, and the channel opens automatically, allowing the agent to be smoothly sprayed outward through the spray nozzle 220.

[0045] After the drug supply stops, the drug pressure disappears, the second spring 660 rebounds and resets, pushing the sealing plate 650 to press the sealing ring 670 again, automatically closing the injection channel to prevent negative pressure mud suction and residue accumulation during drilling, further improving the overall anti-blocking reliability.

[0046] Please see Figure 9 In one embodiment, a motor 830 is installed on the lifting frame 410. A second gear 820 and a first gear 810 are respectively installed on the output shaft of the motor 830 and the outer wall of the drill rod 210. The first gear 810 and the second gear 820 mesh with each other.

[0047] When in operation, the motor 830 starts and drives the first gear 810 to rotate through the second gear 820, which in turn drives the entire drill rod 210 and drill bit 230 to rotate synchronously, providing rotational power for drilling and cutting the soil. When stopping, the motor 830 stops rotating, the gear transmission stops immediately, and the drill rod 210 stops precisely, providing precise action conditions for subsequent spring reset and nozzle alignment and conduction.

[0048] Please see Figure 3 In one embodiment, the conical outer wall of the drill bit 230 is provided with a plurality of protrusions 231.

[0049] Several protrusions 231 are hard soil breaking structures. During the rotary drilling process of the drill bit 230, the protrusions 231 preferentially squeeze, cut, and break up dense soil layers and clods of soil, which can effectively break up hard soil blocks and reduce the large-area frictional resistance between the cone surface of the drill bit 230 and the soil.

[0050] Meanwhile, the protrusion 231 can create a slight loosening effect on the surrounding soil, increase soil porosity, provide diffusion space for subsequent high-pressure agent injection, reduce agent injection resistance, and make the agent diffuse more evenly in the soil layer, further improving the soil remediation effect; the structure is simple and reliable, requires no additional energy consumption, and is suitable for drilling operations in various soil types.

[0051] The working principle of this invention is as follows: First, the connecting frame 120 on the back of the mounting frame 110 is connected to the external traction equipment to achieve rapid transfer and site alignment of the whole machine. After the operation begins, the lifting component 4 drives the drill rod 210 and the drill bit 230 to descend as a whole. At the same time, the motor 830 on the lifting frame 410 drives the drill rod 210 to rotate continuously through the meshing second gear 820 and the first gear 810. The drill rod 210 drives the drill bit 230 to rotate and press down. The protrusion 231 on the conical outer wall of the drill bit 230 breaks the soil and reduces the drilling resistance, thereby achieving stable drilling.

[0052] During drilling, the drill bit 230 is in close contact with the soil and is constrained by significant soil friction, initially keeping the drill bit 230 relatively stationary. Meanwhile, the drill rod 210 continues to rotate, causing the misalignment groove 330 at the bottom of the drill rod 210 to circumferentially misalign with the rotating block 320 inside. Because the bottom end of the rotating rod 310 is fixed to the drill bit 230 by friction, the rotating block 320 remains stationary with the drill bit 230. Therefore, the arc-shaped limiting cylinder 340 within the misalignment groove 330 rotates synchronously with the drill rod 210, causing the limiting block 350 to slide along the arc-shaped limiting cylinder 340 and compress the first... Spring 370 causes relative torsional misalignment between drill rod 210 and drill bit 230. The through hole 260 on drill bit 230 and the injection port 220 on drill rod 210 are misaligned. The injection port 220 is blocked by the outer wall of drill bit 230, realizing automatic hole sealing throughout the drilling process and preventing mud and sand from entering the injection port 220 and causing blockage. When the relative torsional misalignment reaches the point where rotating block 320 abuts against arc-shaped limiting cylinder 340, misalignment groove 330 can drive rotating rod 310 and drill bit 230 to rotate synchronously through elastic element and rotating block 320, completing normal rotary drilling operation.

[0053] When the drill bit 230 descends to the preset depth of the contaminated soil layer, the motor 830 stops working, and the drill rod 210 immediately stops rotating. At this time, the drill bit 230 rotates in the opposite direction relative to the drill rod 210 due to its own rotational inertia and the rebound and reset action of the elastic element, so that the through hole 260 and the injection port 220 are re-aligned precisely, and the agent channel is automatically opened.

[0054] Subsequently, the high-pressure pump 740 at the bottom of the storage tank 750 is started, pressurizing and outputting the remediation agent. The agent enters the delivery channel 510 at the top of the drill rod 210 through the delivery pipe 730 and the fixed rotating connector 720, and then is distributed to the front end of each spray nozzle 220 through the diversion hole 520 and the diversion pipe 530. The agent pressure overcomes the elastic force of the second spring 660, pushing the movable block 630 and movable rod 640 of the elastic valve component 6 forward, causing the sealing plate 650 to disengage from the sealing ring 670. The valve opens, and the high-pressure agent is sprayed out from the spray nozzle 220 and the through hole 260, evenly injected into the surrounding contaminated soil, completing the in-situ agent remediation operation.

[0055] When the spraying is finished and the high-pressure pump 740 stops supplying liquid, the agent pressure disappears, the second spring 660 pushes the movable block 630 to reset, and drives the sealing plate 650 to press the sealing ring 670 again, so as to achieve automatic sealing of the inner side of the spraying port 220 and prevent mud backflow and negative pressure mud suction during the drilling process.

[0056] Finally, the hydraulic rod 450 retracts, driving the lifting frame 410, drill rod 210, and drill bit 230 to rise and reset as a whole, completing a single drilling operation. Then, it can be moved to the next location for cyclical construction.

[0057] The power supply and control of the electrical equipment in this application are all existing technologies, and will not be described in detail here. The control of each component can be achieved by using the PLC controller disclosed in the prior art, and the model and circuit connection of each component are not specifically limited.

[0058] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0059] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A soil remediation agent dispensing device, comprising a mounting frame and a connecting frame, wherein the connecting frame is fixed to the back of the mounting frame, characterized in that, Also includes: Drill pipe, drill bit, and friction misalignment components; The bottom outer wall of the drill rod is provided with an annular groove, and the top inner wall of the drill bit is fixedly provided with an annular slider. The annular slider slides in conjunction with the annular groove, so that the drill bit rotates and is sleeved on the outside of the bottom of the drill rod. The bottom of the drill rod is provided with a liquid spraying port in the circumferential direction, and the top of the drill bit is provided with a through hole in the circumferential direction that matches the liquid spraying port. The friction misalignment component includes a misalignment groove formed at the bottom of the drill rod and arranged circumferentially. A rotating rod is rotatably arranged in the misalignment groove. The bottom end of the rotating rod is fixedly connected to the drill bit. A rotating block that slides with the misalignment groove is arranged circumferentially on the outer wall of the rotating rod. An elastic element is assembled in the misalignment groove and is fixedly connected to the rotating block. During drilling, the drill bit contacts the soil and is limited by soil friction. In the initial stage of rotation, the drill rod rotates circumferentially relative to the drill bit and deforms the elastic element, causing the through hole of the drill bit and the injection port of the drill rod to be misaligned and blocked. When the drill rod rotates to the limit position, the friction misalignment component drives the drill bit to rotate synchronously and drill. After drilling to the set depth, the drill rod stops rotating, and the drill bit rotates back to its original position relative to the drill rod under its own rotational inertia and the reset force of the elastic element, so that the through hole and the injection port are re-aligned and connected, realizing the spraying of the repair agent.

2. The soil remediation agent dispensing device according to claim 1, characterized in that, The elastic element includes an arc-shaped limiting cylinder inside the fixed misalignment groove, a limiting block is slidably assembled inside the arc-shaped limiting cylinder, and an arc-shaped frame is fixedly connected between the limiting block and the rotating block; a first spring is fixedly installed on the inner wall of the arc-shaped limiting cylinder on the side away from the rotating block, and the other end of the first spring is fixedly connected to the limiting block.

3. The soil remediation agent dispensing device according to claim 2, characterized in that, It also includes a lifting component, which includes a lifting frame and two symmetrically arranged hydraulic rods. The two hydraulic rods are fixedly connected between the mounting frame and the lifting frame. Two symmetrically arranged limiting rods are fixed on the mounting frame, and the limiting rods slide in cooperation with the lifting frame. A rotating groove is opened in the middle of the lifting frame, and a rotating ring is fixedly installed on the outer wall of the drill rod. The rotating ring rotates in cooperation with the rotating groove, so that the drill rod is vertically rotated and assembled on the lifting frame.

4. The soil remediation agent dispensing device according to claim 3, characterized in that, The top of the drill rod has a conveying channel, and the bottom of the conveying channel has several diversion holes circumferentially. A diversion pipe is provided between the diversion holes and the injection port. A liquid storage tank is installed on the top of the mounting frame. A high-pressure pump is connected to the bottom of the liquid storage tank. The output end of the high-pressure pump is connected to a conveying pipe. A rotating connector is connected to the end of the conveying pipe. The rotating connector is rotatably and sealingly connected to the conveying channel at the top of the drill rod. A support frame is fixed on the lifting frame. The support frame is fixedly assembled with the rotating connector.

5. The soil remediation agent dispensing device according to claim 4, characterized in that, It also includes a flexible valve component, which includes a fixed cylinder and a sealing ring. The outer wall of the fixed cylinder is circumferentially provided with a bracket that is fixedly connected to the inner wall of the diversion pipe. The sealing ring is installed inside the spray nozzle. A movable block is slidably arranged inside the fixed cylinder. A movable rod that slides and cooperates with the fixed cylinder is installed on the movable block. A sealing plate that cooperates with the sealing ring is installed at the end of the movable rod away from the movable block. A second spring that is fixedly connected to the movable block is provided on the inner wall of the fixed cylinder on the side near the sealing plate.

6. The soil remediation agent dispensing device according to claim 3, characterized in that, The lifting frame is equipped with a motor, and the output shaft of the motor and the outer wall of the drill rod are respectively equipped with a second gear and a first gear, which mesh with each other.

7. The soil remediation agent dispensing device according to claim 1, characterized in that, The drill bit has several protrusions on its conical outer wall.

Images