In-situ drilling and injection integrated minimally invasive repair device and repair method for contaminated sites

Abstract

The present invention relates to the field of environmental engineering technology, and in particular to an in-situ drilling and injection integrated minimally invasive repair device for a contaminated site and a repair method thereof, comprising: a tunneling mechanism, the tunneling mechanism is provided with a tunneling part and a power part driven and connected to the tunneling part, and the end of the tunneling part can be opened and closed and adjusted; a liquid injection mechanism partially arranged inside the tunneling mechanism, the liquid injection mechanism includes a liquid injection pipe arranged inside the power part and the tunneling part, and the liquid injection mechanism is used to inject repair liquid into the contaminated site through the liquid injection pipe; a gas control mechanism partially arranged inside the tunneling mechanism, the gas control mechanism includes an air outlet pipe arranged inside the power part and the tunneling part and a sealing member arranged in the tunneling part, the gas control mechanism seals the upper and lower parts of the tunneling part through the sealing member, the end of the air outlet pipe passes through the sealing member and extends into the lower part of the tunneling part, and the gas control mechanism is provided with a method for discharging gas generated during the repair of the contaminated site through the air outlet pipe; the repair of the underground soil of the contaminated site is achieved through drilling and injection and pumping.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental engineering, and in particular to an in-situ drilling and injection integrated minimally invasive repair device for a contaminated site and a repair method thereof. Background Art

[0002] Soil pollution mainly comes from various human activities and natural processes. It is one of the major environmental problems facing the world today. Common sources of soil pollution include industrial emissions, waste disposal, pesticide and fertilizer use, mineral mining, combustion emissions, transportation and accidental leaks. These activities can cause harmful substances to appear in the soil, such as heavy metals, organic compounds, pesticide residues and petroleum substances, causing serious harm to the soil environment and ecosystem.

[0003] Traditional soil remediation mainly uses methods such as soil stripping, soil replacement, physical pyrolysis, and chemical solidification. These methods have problems such as destroying soil structure, high cost, and the risk of pollution leakage. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide an integrated in-situ drilling and injection minimally invasive repair device and a repair method for contaminated sites, so as to solve the problems that the existing traditional soil remediation mainly adopts soil stripping, soil replacement, physical pyrolysis, chemical solidification and other methods, which have the problems of destroying soil structure, high cost and risk of pollution leakage.

[0005] The technical solution to achieve the above purpose is:

[0006] The present invention provides an in-situ drilling and injection integrated minimally invasive repair device for contaminated sites, which is characterized by comprising:

[0007] A tunneling mechanism, comprising a tunneling portion and a power portion drivingly connected to the tunneling portion, wherein the end portion of the tunneling portion can be opened and closed;

[0008] a liquid injection mechanism partially disposed inside the excavation mechanism, the liquid injection mechanism comprising a liquid injection pipe disposed inside the power unit and the excavation unit, the liquid injection mechanism being used to inject remediation liquid into the contaminated site through the liquid injection pipe;

[0009] A gas control mechanism is partially arranged inside the excavation mechanism, and the gas control mechanism includes an outlet pipe arranged inside the power unit and the excavation unit and a sealing member arranged inside the excavation unit. The gas control mechanism seals the upper and lower parts of the excavation unit through the sealing member, and the end of the outlet pipe passes through the sealing member and extends into the lower part of the excavation unit. The gas control mechanism is provided with a method of discharging the gas generated during the remediation of the contaminated site through the outlet pipe.

[0010] A further improvement of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention is that the power unit comprises: a power sleeve, a first electromagnet, a second electromagnet, a gravity block, a guide rod and a first spring;

[0011] One end of the power sleeve is detachably connected to the tunneling part;

[0012] The first electromagnet is arranged on the outer side of one end of the power sleeve, and generates magnetic force when the first electromagnet is energized;

[0013] The second electromagnet is arranged on the outer side of the other end of the power sleeve, and the second electromagnet generates magnetic force when energized;

[0014] Both ends of the guide rod are fixedly connected to the first electromagnet and the second electromagnet respectively;

[0015] The weight block is arranged on the outside of the power sleeve, and a guide hole is provided on the weight block corresponding to the guide rod. The weight block is slidably connected to the guide rod, and the weight block has magnetism;

[0016] The first spring is sleeved on the guide rod and is arranged on a side of the gravity block close to the excavation part.

[0017] A further improvement of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention is that the excavation part comprises: an excavation sleeve and an excavation head;

[0018] One end of the tunneling sleeve is detachably connected to the power unit;

[0019] The tunneling head is connected to one end of the tunneling sleeve away from the power unit. The tunneling head is hinged to the tunneling sleeve and can be opened and closed.

[0020] A further improvement of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention is that the tunneling head includes a plurality of enclosure members and a plurality of second springs;

[0021] A plurality of the enclosing members are hinged to the end of the tunneling sleeve, and a plurality of the enclosing members are arranged around the end of the tunneling sleeve;

[0022] A plurality of second springs are arranged corresponding to the enclosure, one end of the second spring is connected to the end of the tunneling sleeve, and the other end is connected to the end of the enclosure.

[0023] A further improvement of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention is that the tunneling part further includes an extension sleeve detachably arranged between the power part and the tunneling sleeve.

[0024] A further improvement of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention is that the injection mechanism comprises: an injection machine, an injection pipe, and an injection cylinder;

[0025] The liquid injection machine is provided with a liquid outlet;

[0026] The injection pipe is a hard pipe, which is arranged in the tunneling sleeve. One end of the injection pipe is exposed from the top of the tunneling mechanism and is connected to the liquid outlet. The other end of the injection pipe is arranged at one end of the tunneling sleeve close to the tunneling head.

[0027] The liquid injection cylinder is arranged on the outer periphery of the liquid injection tube, and one end of the liquid injection cylinder is sealed and connected to the outer side surface of the liquid injection tube.

[0028] A further improvement of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention is that the other end of the injection cylinder is sealed, and an injection hole is provided on the side wall of the injection cylinder close to the tunneling head.

[0029] A further improvement of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention is that the gas control mechanism further comprises: an air pump and an air inlet pipe;

[0030] The air pump is provided with an air outlet;

[0031] The sealing member is an air cushion provided on the outside of the injection cylinder, and the air cushion can fill the gap between the injection cylinder and the excavation sleeve after being inflated;

[0032] The air inlet pipe is arranged inside the excavation sleeve, one end of the air inlet pipe is connected to the air outlet, and the other end is connected to the air cushion.

[0033] A further improvement of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention is that the air pump is provided with an air extraction port;

[0034] One end of the air outlet pipe is communicated with the air extraction port, and the other end of the air outlet pipe is communicated with the interior of the liquid injection cylinder.

[0035] The present invention also provides a repair method for a contaminated site using an in-situ drilling and injection integrated minimally invasive repair device, comprising the following steps:

[0036] Placing the excavation mechanism on the contaminated site, and starting the power unit to drive the excavation unit downward to the repair position;

[0037] Fix the injection pipe, and start the power unit in reverse to drive the excavation unit upward, so that the injection mechanism supports the openable and closable end of the excavation unit to keep it in an open and closed state;

[0038] injecting remediation fluid into the contaminated site through a liquid injection mechanism;

[0039] The gas control mechanism is activated to collect the gas in the contaminated site for centralized treatment.

[0040] The beneficial effects of the present invention are: a tunneling force is generated by the power unit to drive the tunneling unit to tunnel underground, and the contaminated site is sealed from the outside world through the seal in the gas control mechanism to prevent the underground toxic gas from diffusing to the surface, and the repair liquid is injected into the contaminated site through the injection mechanism to repair the underground soil, and then the toxic gas in the contaminated site is extracted for centralized treatment through the gas control mechanism to further purify the underground soil. The present invention combines drilling, injection and exhaust processes to perform minimally invasive repair directly in the contaminated soil, thereby achieving the removal of soil pollutants and micro-disturbance of the soil structure, and reducing disturbance to the surrounding environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a cross-sectional view of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites according to the present invention.

[0042] Figure 2 This is a three-dimensional diagram of the excavation mechanism in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention.

[0043] Figure 3 This is a three-dimensional diagram of the injection mechanism in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention.

[0044] Figure 4 This is a three-dimensional diagram of the injection cylinder in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention.

[0045] Figure 5 This is a three-dimensional diagram of the gas control mechanism in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention.

[0046] Figure 6 This is a cross-sectional view of the tunneling head in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention.

[0047] Figure 7 This is a cross-sectional view of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention during the injection state.

[0048] Figure 8 This is a three-dimensional diagram of the injection cylinder in the injection state of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention.

[0049] Figure 9 This is a three-dimensional diagram of the injection machine in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention.

[0050] Figure 10 This is a three-dimensional diagram of the air pump in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention.

[0051] 21. Excavation mechanism; 22. Power unit; 221. Controller; 222. Power sleeve; 223. First electromagnet; 224. Second electromagnet; 225. Gravity block; 226. Guide rod; 227. First spring; 228. Extension sleeve; 23. Excavation unit; 231. Excavation sleeve; 232. Excavation head; 2321. Enclosure; 2322. Second spring; 31. Liquid injection mechanism; 311. Liquid injection machine; 312. Liquid injection pipe; 313. Liquid injection cylinder; 314. Extended liquid injection pipe; 41. Gas control mechanism; 411. Air pump; 412. Air outlet pipe; 413. Air cushion; 414. Air inlet pipe. DETAILED DESCRIPTION

[0052] The purpose of the present invention is to overcome the defects of the prior art and provide an integrated in-situ drilling and injection minimally invasive repair device for contaminated sites and a repair method thereof, so as to solve the problems that the existing traditional soil repair mainly adopts soil stripping, soil replacement, physical pyrolysis, chemical solidification and other methods, which have the problems of destroying soil structure, high cost, and risk of pollution leakage. The excavation force is generated by the power unit to drive the excavation unit to excavate underground, and the contaminated site is sealed from the outside world by the seal in the gas control mechanism to prevent the underground toxic gas from diffusing to the surface. The repair liquid is injected into the contaminated site by the injection mechanism to repair the underground soil, and the toxic gas in the contaminated site is extracted by the gas control mechanism for centralized treatment to further purify the underground soil. The present invention combines the drilling and injection processes to perform minimally invasive repair directly in the contaminated soil, thereby removing soil pollutants and micro-disturbance of the soil structure, and reducing disturbance to the surrounding environment.

[0053] The present invention combines drilling, injection and exhaust processes to perform minimally invasive remediation directly in contaminated soil, thereby removing soil pollutants and slightly disturbing the soil structure, reducing disturbance to the surrounding environment.

[0054] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0055] See Figure 1 , showing a cross-sectional view of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention. Figure 1 As shown, the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention includes: a tunneling mechanism 21, a liquid injection mechanism 31 and a gas control mechanism 41.

[0056] The tunneling mechanism 21 is provided with a power unit 22 for tunneling, and the tunneling mechanism 21 is provided with a tunneling part 23 with an openable and closable end. The power unit 22 is connected to the tunneling part 23, and the power unit 22 drives the tunneling part 23 to tunnel underground. The injection mechanism 31 is partially arranged inside the tunneling mechanism 21, and the injection mechanism 31 is provided with an injection pipe 312 inside the power unit 22 and the tunneling part 23. The injection pipe 312 is used to inject remediation liquid into the contaminated site. The injection port of the injection pipe 312 is arranged at the end of the tunneling part 23 away from the power unit 22 for easy injection. The gas control mechanism 41 is partially arranged inside the tunneling mechanism 21, and the gas control mechanism 41 is provided with a sealing member for sealing the contaminated site from the outside world and an outlet pipe 412 for discharging gas in the contaminated site inside the power unit 22 and the tunneling part 23. The outlet of the outlet pipe 412 is arranged at the end of the tunneling part 23 away from the power unit 22 for easy exhaust.

[0057] See Figure 2 , showing a stereoscopic view of the excavation mechanism 21 in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention. Figure 1 and Figure 2 As shown, the power unit 22 of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention includes: a power sleeve 222, a first electromagnet 223, a second electromagnet 224, a gravity block 225, a guide rod 226 and a first spring 227.

[0058] One end of the power sleeve 222 is detachably connected to the excavation part 23, the first electromagnet 223 is arranged on the outside of one end of the power sleeve 222, and the second electromagnet 224 is arranged on the outside of the other end of the power sleeve 222. The two ends of the guide rod 226 are respectively fixedly connected to the first electromagnet 223 and the second electromagnet 224. The gravity block 225 is arranged on the outside of the power sleeve 222, and a guide hole is provided on the gravity block 225 corresponding to the guide rod 226. The gravity block 225 is slidably connected to the guide rod 226. The gravity block 225 is magnetic. The first spring 227 is sleeved on the guide rod 226 and is arranged on the side of the gravity block 225 close to the excavation part 23.

[0059] The in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention further includes a controller 221 , which is disposed on the ground near the excavation point and provides power to the power unit 22 .

[0060] In a preferred embodiment of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention, the power sleeve 222 is vertically arranged, the first electromagnet 223 is arranged on the top outer side of the power sleeve 222, and the second electromagnet 224 is arranged on the bottom outer side of the power sleeve 222. The first electromagnet 223 and the second electromagnet 224 are both electrically connected to the controller 221. When it is necessary to excavate downward, the controller 221 energizes the second electromagnet 224, and the second electromagnet 224 generates a magnetic force to attract the gravity block 225 downward along the guide rod 226 to attract the second electromagnet 224 and collide with it, generating a downward force on the second electromagnet 224 to drive the excavation part 23 to excavate downward. After the collision, the controller 221 stops energizing the second electromagnet 224, and the first spring 227 uses elastic force to push the gravity block 225 apart and separate it from the second electromagnet 224. The above operation is repeated to further excavate downward until the preset position is reached.

[0061] Furthermore, the first electromagnet 223, the second electromagnet 224, the gravity block 225 and the guide rod 226 in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention are all arranged at intervals on the periphery of the power sleeve 222, so that the gravity block 225 can provide power to the device more evenly.

[0062] Furthermore, the first electromagnet 223, the second electromagnet 224 and the weight block 225 in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention are all hollow cylindrical and are sleeved on the outer periphery of the power sleeve 222. The weight block 225 is sleeved on the outer periphery of the guide rod 226 so that the weight block 225 can provide power to the device more evenly. Figure 6 , showing a cross-sectional view of the driving head 232 in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention. Figure 1 、 Figure 2 and Figure 6 As shown, the tunneling part 23 of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention includes: a tunneling sleeve 231 and a tunneling head 232.

[0063] One end of the tunneling sleeve 231 is detachably connected to the power unit 22, and the tunneling head 232 is connected to the end of the tunneling sleeve 231 away from the power unit 22. The tunneling head 232 is hinged to the tunneling sleeve 231. The tunneling head 232 is conical in shape for better tunneling, and the tunneling head 232 can be opened and closed, so that after the device has tunneled, the tunneling head 232 can be opened to inject liquid and exhaust gas into the underground soil.

[0064] Furthermore, in a preferred embodiment of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention, the tunneling head 232 includes a plurality of enclosure members 2321 and a plurality of second springs 2322 .

[0065] A number of enclosing parts 2321 are hinged to the end of the tunneling sleeve 231, and a number of enclosing parts 2321 are arranged around the end of the tunneling sleeve 231, so that the tunneling head 232 has a conical tip for better tunneling. A number of second springs 2322 are arranged corresponding to the enclosing parts 2321, one end of the second spring 2322 is connected to the end of the tunneling sleeve 231, and the other end is connected to the end of the enclosing part 2321. The second spring 2322 pulls the enclosing part 2321 after the number of enclosing parts 2321 are opened, so that the enclosing part 2321 is reset and the tunneling head 232 is closed again.

[0066] Preferably, in a preferred embodiment of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention, the excavation part 23 also includes an extension sleeve 228 detachably arranged between the power part 22 and the excavation sleeve 231, which is used to extend the length of the excavation sleeve 231, so that the device is suitable for deeper excavation depths.

[0067] See Figure 3 , showing a three-dimensional diagram of the injection mechanism 31 in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention. Figure 4 , showing a three-dimensional view of the injection cylinder 313 in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention. Figure 9 , showing a stereoscopic view of the injection machine 311 in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention.

[0068] like Figure 3 、 Figure 4 and Figure 9 As shown, the injection mechanism 31 of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention includes: an injection machine 311 , an injection pipe 312 , and an injection cylinder 313 .

[0069] See Figure 7 , showing a cross-sectional view of the injection state of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention. Figure 8 , showing a three-dimensional view of the injection cylinder 313 in the injection state of the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention.

[0070] Combine Figure 3-4 、 Figure 7-9The injection machine 311 in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention is provided with a liquid outlet, and the injection pipe 312 is a hard pipe, which is arranged in the excavation sleeve 231, and one end of the injection pipe 312 is exposed from the top of the excavation mechanism 21 and communicated with the liquid outlet, and the other end of the injection pipe 312 is arranged at one end of the excavation sleeve 231 close to the excavation head 232, and the injection cylinder 313 is arranged on the outer periphery of the injection cylinder 312, and one end of the injection cylinder 313 is sealed with the outer side surface of the injection cylinder 312. When the excavation mechanism 21 excavates the injection mechanism 31 to the preset position, the liquid is discharged through the injection pipe 312. The part of the injection pipe 312 exposed from the tunneling mechanism 21 is clamped by external force to keep the injection pipe 312 fixed, and then the controller 221 is started to power the first electromagnet 223. The first electromagnet 223 attracts the gravity block 225 upward and collides. The first electromagnet 223 is subjected to the upward force of the gravity block 225, which drives the power unit 22 upward so that the tunneling head 232 comes into contact with the injection cylinder 313. The injection cylinder 313 pushes open several enclosures 2321 to realize the opening of the tunneling head 232, and then injects liquid and exhausts air into the underground soil.

[0071] like Figure 4 As shown, the other end of the injection cylinder 313 in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention is sealed, and an injection hole is provided on the side wall of the injection cylinder 313 near the tunneling head 232. The sealed end improves the strength of the injection cylinder 313, and the injection hole ensures that the channel for injecting liquid into the underground soil is unobstructed.

[0072] Furthermore, the injection mechanism 31 in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention also includes an extended injection tube 314 with one end connected to the liquid outlet, and the other end of the extended injection tube 314 is connected to the injection tube 312, so that the injection machine 311 and the injection tube 312 are more firmly connected.

[0073] See Figure 5 , showing a three-dimensional diagram of the gas control mechanism 41 in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention. Figure 10 , showing a stereoscopic view of the air pump 411 in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention.

[0074] Furthermore, the gas control mechanism 41 in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention further includes: an air pump 411 and an air inlet pipe 414 .

[0075] The air pump 411 is provided with an air outlet, and the sealing member is an air cushion 413 arranged on the outside of the liquid injection cylinder. After the air cushion 413 is inflated, the gap between the liquid injection cylinder 313 and the tunneling sleeve 231 can be filled. The air inlet pipe 414 is arranged inside the tunneling sleeve 231. One end of the air inlet pipe 414 is connected to the air outlet, and the other end is connected to the air cushion 413. After the air cushion 413 is filled, the air cushion 413 fills the gap between the liquid injection cylinder 313 and the tunneling sleeve 231, preventing harmful gases in the underground soil from diffusing to the outside through the tunneling sleeve 231, thereby improving the safety of the device when used.

[0076] Preferably, the air pump 411 in the in-situ drilling and injection integrated minimally invasive repair device for contaminated sites of the present invention is provided with an air extraction port, one end of the air outlet pipe 412 is connected to the air extraction port, and the other end of the air outlet pipe 412 is connected to the inside of the injection cylinder 313. The harmful gases in the underground soil are extracted by the air pump 411 to purify the underground soil.

[0077] The repair method of the contaminated site in-situ drilling and injection integrated minimally invasive repair device of the present invention will be further described below with reference to the accompanying drawings.

[0078] First, determine the remediation location and drilling depth of the contaminated site based on the survey data.

[0079] The device is then placed vertically on the ground, and the controller 221 is started. Power is supplied to the second electromagnet 224 through the controller 221. When the second electromagnet 224 is energized, magnetism is generated, which attracts the gravity block 225 downward to collide with the second electromagnet 224. The impact force of the gravity block 225 on the second electromagnet 224 causes the power unit 22 to move downward, thereby driving the excavation unit 23 to dig underground. The second electromagnet 224 is de-energized by the controller 221, so that the magnetism of the second electromagnet 224 disappears. The gravity block 225 is reset upward by the elastic force of the first spring 227. This operation is repeated, and the excavation unit 23 further digs downward. When the length of the excavation unit 23 exposed above the ground is insufficient, the power unit 22 is removed, and an extension sleeve 228 is connected to the end of the excavation unit 23. Then, the power unit 22 is connected to the end of the extension sleeve 228, thereby increasing the excavation depth of the device and improving the adaptability of the device. When the excavation unit 23 excavates to the preset position, the end of the injection tube 312 is manually clamped. , keep the injection pipe 312 fixed, start the controller 221, and power the first electromagnet 223 through the controller 221. After the first electromagnet 223 is energized, it generates magnetism, attracting the gravity block 225 upward to contact the first electromagnet 223. The force of the gravity block 225 on the first electromagnet 223 makes the power unit 22 upward, thereby driving the excavation unit 23 upward, so that the end of the injection cylinder 313 supports the end of the excavation unit 23, opens the excavation head 232, and expands the several enclosures 2321 outward. At this time, the air pump 411 is turned on to inflate the air cushion 413 outside the injection cylinder 313, so that the air cushion 413 fills the gap between the injection cylinder 313 and the excavation sleeve 231 to prevent the harmful gases in the underground soil from diffusing to the outside. Then, liquid is injected through the injection pipe 312 to purify the underground soil. At the same time, air can be extracted through the outlet pipe 412 to exhaust the harmful gases in the underground soil while ensuring the injection pressure, thereby further purifying the underground soil.

[0080] After the injection pressure is completely dissipated, the gas control mechanism 41 is closed, the gas extraction is stopped, and the gas in the air cushion 413 is discharged. The fixation of the injection tube 312 is cancelled, and power is supplied to the first electromagnet 223. After the first electromagnet 223 is energized, magnetism is generated, and the gravity block 225 is attracted upward to contact the first electromagnet 223. The force of the gravity block 225 on the first electromagnet 223 causes the power part 22 to move upward, thereby driving the excavation part 23 to move upward, causing the device to move upward. When the extension sleeve 228 is completely exposed to the ground, the power part 22 is removed, and the extension sleeve 228 is removed. The power part 22 is connected to the excavation sleeve 231, and power is continued to be supplied to the first electromagnet 223 until the excavation part 23 extends out of the ground. The above is the method of using the device.

[0081] The present invention has been described in detail above with reference to the embodiments of the accompanying drawings. A person skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. A minimally invasive repair device for in-situ drilling and injection of contaminated sites, characterized in that: include: A tunneling mechanism, comprising a tunneling portion and a power portion drivingly connected to the tunneling portion, wherein the end portion of the tunneling portion can be opened and closed; a liquid injection mechanism partially disposed inside the excavation mechanism, the liquid injection mechanism comprising a liquid injection pipe disposed inside the power unit and the excavation unit, the liquid injection mechanism being used to inject remediation liquid into the contaminated site through the liquid injection pipe; A gas control mechanism partially disposed within the excavation mechanism, the gas control mechanism comprising an outlet pipe disposed within the power unit and the excavation unit, and a sealing member disposed within the excavation unit. The gas control mechanism seals the upper and lower portions of the excavation unit via the sealing member, and an end portion of the outlet pipe extends through the sealing member into the lower portion of the excavation unit. The gas control mechanism is configured to discharge gas generated during the remediation of the contaminated site via the outlet pipe. The power unit includes: a power sleeve, a first electromagnet, a second electromagnet, a gravity block, a guide rod and a first spring; one end of the power sleeve is detachably connected to the excavation unit; the first electromagnet is arranged on the outside of one end of the power sleeve, and the first electromagnet generates magnetic force when energized; the second electromagnet is arranged on the outside of the other end of the power sleeve, and the second electromagnet generates magnetic force when energized; the two ends of the guide rod are fixedly connected to the first electromagnet and the second electromagnet respectively; the gravity block is arranged on the outside of the power sleeve, and a guide hole is provided on the gravity block corresponding to the guide rod, the gravity block is slidably connected to the guide rod, and the gravity block has magnetism; the first spring is sleeved on the guide rod and is arranged on the side of the gravity block close to the excavation unit; The tunneling unit includes: a tunneling sleeve and a tunneling head; one end of the tunneling sleeve is detachably connected to the power unit; the tunneling head is connected to the end of the tunneling sleeve away from the power unit, and the tunneling head is hinged to the tunneling sleeve, and the tunneling head can be opened and closed; The tunneling head includes a plurality of enclosures and a plurality of second springs; the plurality of enclosures are hinged to the ends of the tunneling sleeve, and the plurality of enclosures are arranged around the ends of the tunneling sleeve; the plurality of second springs are arranged corresponding to the enclosures, and one end of the second spring is connected to the end of the tunneling sleeve, and the other end is connected to the end of the enclosure; The liquid injection mechanism includes: a liquid injection machine, a liquid injection pipe, and a liquid injection cylinder; the liquid injection machine is provided with a liquid outlet; the liquid injection pipe is a hard pipe, which is arranged in the excavation sleeve, one end of the liquid injection pipe is exposed from the top of the excavation mechanism and is connected to the liquid outlet, and the other end of the liquid injection pipe is arranged at one end of the excavation sleeve close to the excavation head; the liquid injection cylinder is arranged on the outer periphery of the liquid injection pipe, and one end of the liquid injection cylinder is sealed and connected to the outer side surface of the liquid injection pipe.

2. The in-situ drilling and injection integrated minimally invasive repair device for contaminated sites according to claim 1, characterized in that: The excavation part further includes an extension sleeve detachably arranged between the power part and the excavation sleeve.

3. The in-situ drilling and injection integrated minimally invasive repair device for contaminated sites according to claim 1, characterized in that: The other end of the liquid injection cylinder is sealed, and a liquid injection hole is provided on the side wall of the liquid injection cylinder close to the tunneling head.

4. The in-situ drilling and injection integrated minimally invasive repair device for contaminated sites according to claim 1, characterized in that: The gas control mechanism further includes: an air pump and an air inlet pipe; The air pump is provided with an air outlet; The sealing member is an air cushion provided on the outside of the injection cylinder, and the air cushion can fill the gap between the injection cylinder and the excavation sleeve after being inflated; The air inlet pipe is arranged inside the excavation sleeve, one end of the air inlet pipe is connected to the air outlet, and the other end is connected to the air cushion.

5. The in-situ drilling and injection integrated minimally invasive repair device for contaminated sites according to claim 4, characterized in that: The air pump is provided with an air extraction port; One end of the air outlet pipe is communicated with the air extraction port, and the other end of the air outlet pipe is communicated with the interior of the liquid injection cylinder.

6. A method for repairing a contaminated site using the in-situ drilling and injection integrated minimally invasive repair device according to claim 1, characterized in that: The steps include: Placing the excavation mechanism on the contaminated site, and starting the power unit to drive the excavation unit downward to the repair position; Fix the injection pipe, and start the power unit in reverse to drive the excavation unit upward, so that the injection mechanism supports the openable and closable end of the excavation unit to keep it in an open and closed state; injecting remediation fluid into the contaminated site through a liquid injection mechanism; The gas control mechanism is activated to collect the gas in the contaminated site for centralized treatment.

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