A steam extraction remediation device for contaminated soil

Abstract

The present application relates to the technical field of soil remediation, and particularly relates to a steam leaching remediation equipment for remediation of contaminated soil, which comprises an operation table, a supporting plate, a shell, a winding column, a blowing and injecting assembly, a gas extraction assembly and a driving assembly, the supporting plate is vertically slidably installed at one end of the operation table, the top of the shell is fixedly connected with the bottom of the supporting plate, the shell is a hollow cylindrical structure, the winding column is sleeved on the periphery of the shell and rotationally connected with the shell, the blowing and injecting assembly comprises a sliding rod and a pair of inserting rods, the sliding rod is slidably connected with the inner wall of the shell, in order to stabilize the diffusion range of steam in the soil and guide the steam flow to prevent secondary pollution, the winding column is moved along with the shell to open a pit in the soil, then the shell is lifted and pressed again, the inserting rods are opened to the two sides and inserted into the soil, the steam flow area is enlarged, finally the soil is backfilled and steam blowing and injecting are carried out, so that the steam flow path is stably backflowed to the pit, and secondary pollution caused by a large amount of waste gas escaping is prevented.

Description

Technical Field

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

[0002] Soil vapor extraction remediation is an in-situ remediation technology for soil contaminated with volatile organic compounds (VOCs), such as benzene compounds, petroleum hydrocarbons, and halogenated hydrocarbons. Its principle involves burying extraction wells beneath the contaminated area and using the negative pressure generated by a vacuum pump to extract the vapors of volatile pollutants from the soil pores along with air. These vapors are then purified by a surface treatment system (such as activated carbon adsorption or incineration) before being discharged in compliance with standards. Simultaneously, this process accelerates the volatilization and biodegradation of pollutants.

[0003] The advantages of this technology are low energy consumption and simple equipment, but its treatment effect is poor for soils with low permeability and low volatile pollutants. Another existing technology is steam-enhanced remediation, which injects steam into the soil simultaneously through multiple injection wells, forming a "steam front" in the contaminated area. This pushes pollutants towards the extraction wells, utilizing the heat and fluid pressure of the steam to increase the fluidity of the pollutants, thereby further improving the soil remediation effect.

[0004] For example, comparing a steam thermally enhanced gas phase extraction remediation device for treating contaminated soil with Chinese patent publication number CN118385258B, the device includes a base, a gas phase extraction component, and a gas purification component. The gas phase extraction component includes a steam generator and a guide frame mounted on the base, an outer tube snapped into the guide frame, an extraction tube mounted in the outer tube, a push cylinder mounted at the top of the guide frame, and a centrifugal pump communicating with the inside of the extraction tube. The gas purification component includes a cyclone separator mounted on the base, a purification cylinder connected to the cyclone separator, a purification filter element snapped into the purification cylinder, and a mesh frame.

[0005] While this method utilizes hot steam to treat volatile pollutants in the soil, improving the extraction efficiency, it also faces challenges in enhancing steam flow and controlling its diffusion direction. This results in high requirements for soil conditions and limited remediation effectiveness. In dry, loose soil, the steam diffuses widely, potentially leading to significant escape during extraction and secondary pollution. Conversely, in moist, compact soil, the steam struggles to diffuse, limiting the remediation area and reducing remediation quality. Summary of the Invention

[0006] The purpose of this invention is to provide a steam extraction remediation device for remediating contaminated soil, which can stabilize the diffusion range of steam in the soil and guide the steam flow to prevent secondary pollution.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A steam extraction remediation device for contaminated soil is provided, comprising an operating platform, a support plate, a housing, a auger, an injection assembly, an extraction assembly, and a drive assembly. The support plate is vertically slidably mounted on one end of the operating platform. The top of the housing is fixedly connected to the bottom of the support plate. The housing is a hollow cylindrical structure. The auger is sleeved around the housing and rotatably connected to it. The injection assembly includes a slide rod and a pair of insert rods. The slide rod is slidably connected to the inner wall of the housing. The top of the insert rod is hinged to the bottom of the slide rod, and the bottom of the insert rod passes through the bottom wall of the housing and is slidably connected to it. One side of the insert rod abuts against the inner wall of the auger. The drive assembly is mounted on the support plate and is used to drive the auger to rotate and drive the slide rod to slide vertically. The extraction assembly is mounted on the operating platform and is used to extract and collect waste gas.

[0009] Preferably, the drive assembly includes a first motor, a rotating shaft, and a pair of bevel gears. The top of the first motor is fixedly connected to the bottom of the support plate. The rotating shaft is coaxially connected to the output shaft of the first motor. The rotating shaft passes through the side wall of the housing and is rotatably connected to it. One bevel gear is coaxially connected to the periphery of the rotating shaft, and the other bevel gear is coaxially connected to the top of the auger. The two bevel gears mesh with each other.

[0010] Preferably, the drive assembly further includes a screw and a one-way transmission mechanism. The bottom of the screw is rotatably connected to the bottom wall of the housing. The screw passes through the slide rod and is threadedly connected to it. Both sides of the slide rod have square concave structures, and both sides of the inner wall of the housing have square protruding structures. The protruding part of the inner wall of the housing engages with the recessed part of the slide rod. The one-way transmission mechanism is mounted on the rotating shaft and is used to drive the screw to rotate in one direction.

[0011] Preferably, the one-way transmission mechanism includes a ratchet, a toothed ring, multiple toothed blocks, and multiple springs. The ratchet is coaxially connected to the rotating shaft, the toothed ring is coaxially connected to the top of the screw, and the multiple toothed blocks are circumferentially distributed around the ratchet. The toothed blocks are rotatably mounted on the ratchet, and the bottom of the toothed blocks meshes with the teeth on the toothed ring. The springs are mounted on the toothed blocks and are used to provide thrust for the toothed blocks to rotate and reset.

[0012] Preferably, the ratchet has multiple grooves on its outer periphery. The grooves are T-shaped. One side of the bottom of the tooth block rotates with the inner wall of the groove, and the bottom of the other side of the tooth block abuts against the inner wall of the groove. One end of the spring is fixedly connected to the center of the bottom of the tooth block, and the other end of the spring is fixedly connected to the inner wall of the groove.

[0013] Preferably, the injection assembly further includes a steam generator, a hose, multiple torsion springs, a pair of plugs, and multiple arc-shaped covers. The bottom of the steam generator is fixedly connected to the top of the operating table. The air outlet of the steam generator is connected to one end of the hose. The other end of the hose passes through the support plate and the housing and is connected to the top of the slide rod. The bottom of the slide rod is connected to the top of the insertion rod. The top of the insertion rod is rotatably connected to the bottom of the slide plate. Multiple torsion springs are respectively sleeved on both sides of the top of the insertion rod. One end of the torsion spring is fixedly connected to the insertion rod, and the other end of the torsion spring is fixedly connected to the slide rod. The bottom of the insertion rod is fixedly connected to the top of the plug. The two plugs are combined to form a conical structure. The top edge of the plug abuts against the bottom of the auger. Multiple spray holes are opened on the opposite side of the two insertion rods. The arc-shaped cover is located at the bottom of the spray hole and is fixedly connected to the insertion rod. One end of the arc-shaped cover opening is close to the slide rod.

[0014] Preferably, the air extraction assembly includes an annular seat, an air collection hood, and a scraper. One side of the annular seat is fixedly connected to the bottom of the operating table. The air collection hood has a semi-circular shell structure. One end of the air collection hood is rotatably connected to the outer periphery of the annular seat. The scraper is fixedly connected to the inner wall of the air collection hood.

[0015] Preferably, the air extraction assembly further includes a second motor and a pair of spur gears. The bottom of the second motor is fixedly connected to the top of the air collection hood. The output shaft of the second motor passes through the top wall of the air collection hood and is coaxially connected to one of the spur gears. The other spur gear is fixedly connected to the outer periphery of the bottom of the ring seat. The two spur gears mesh with each other.

[0016] Preferably, the air extraction assembly further includes a fan, an air duct, and a filter plate. The bottom of the fan is fixedly connected to the top of the air collection hood. The air inlet of the fan is connected to one end of the air duct. The other end of the air duct passes through the top wall of the air collection hood and is connected to its interior. The filter plate is fixedly connected to the inner wall of the air duct.

[0017] Preferably, it also includes a hydraulic rod, a slide rail, and a slider. The top of the hydraulic rod passes through the top of the operating table and is fixedly connected thereto. The telescopic end of the hydraulic rod is fixedly connected to the top of the support plate. One end of the support plate is fixedly connected to the slider. The slider is slidably connected to the periphery of the slide rail. The slide rail is fixedly connected to one end of the operating table.

[0018] The beneficial effects of this invention are:

[0019] 1. In this invention, during steam extraction remediation of soil, the auger first moves downwards along with the casing while simultaneously rotating, creating a pit in the soil. The casing then rises and is pressed down again. During this process, the insert rod opens to both sides and inserts into the soil, thereby expanding the steam flow area. Finally, the soil is backfilled and steam is injected. Due to the loose soil within the pit, the airflow gradually flows back into the pit and surges upwards, eventually leaving the soil and being absorbed by the extraction components. This ensures a stable steam flow path back to the pit, unaffected by soil moisture or density, preventing large-scale escape of exhaust gas and secondary pollution. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments of the present invention will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 .

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 .

[0023] Figure 3 This is a side view of the structure of the present invention. Figure 1 .

[0024] Figure 4 This is a side view of the structure of the present invention. Figure 2 .

[0025] Figure 5 This is a structural breakdown of the blow-in assembly of the present invention. Figure 1 .

[0026] Figure 6 This is an exploded view of the air extraction component structure of the present invention.

[0027] Figure 7 This is a cross-sectional view of the shell structure of the present invention. Figure 1 .

[0028] Figure 8 This is a cross-sectional view of the shell structure of the present invention. Figure 2 .

[0029] Figure 9 This is a structural breakdown diagram of the driving component of the present invention.

[0030] Figure 10 This is a cross-sectional view of the ratchet structure of the present invention.

[0031] Figure 11 This is a structural breakdown of the blow-in assembly of the present invention. Figure 2 .

[0032] In the picture:

[0033] 1. Control panel; 10. Support plate; 11. Housing; 12. Piston; 13. Hydraulic rod; 14. Slide rail; 15. Slider; 16. Soil; 17. Pit;

[0034] 2. Injection assembly; 20. Slide rod; 21. Insert rod; 210. Nozzle; 22. Steam generator; 23. Hoses; 24. Torsion spring; 25. Plug; 26. Arc-shaped cover;

[0035] 3. Exhaust assembly; 30. Annular seat; 31. Air collection hood; 32. Scraper; 33. Second motor; 34. Spur gear; 35. Fan; 36. Air duct; 37. Filter plate;

[0036] 4. Drive assembly; 40. First motor; 41. Shaft; 42. Bevel gear; 43. Screw; 44. One-way transmission mechanism; 440. Ratchet; 4400. Groove; 441. Gear ring; 442. Gear block; 443. Spring. Detailed Implementation

[0037] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0039] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0040] In the description of this invention, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating a connection between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] like Figures 1 to 11 As shown:

[0042] A steam extraction remediation device for contaminated soil 16 includes an operating platform 1, a support plate 10, a shell 11, a auger 12, a blow-in assembly 2, an extraction assembly 3, and a drive assembly 4. The support plate 10 is vertically slidably mounted on one end of the operating platform 1. The top of the shell 11 is fixedly connected to the bottom of the support plate 10. The shell 11 is a hollow cylindrical structure. The auger 12 is sleeved around the shell 11 and rotatably connected to it. The blow-in assembly 2 includes a slide rod 20 and a pair of insert rods 21. The slide rod 20 is slidably connected to the inner wall of the shell 11. The top of the insert rods 21 is hinged to the bottom of the slide rod 20. The bottom of the insert rods 21 passes through the bottom wall of the shell 11 and is slidably connected to it. One side of the insert rods 21 abuts against the inner wall of the auger 12. The drive assembly 4 is mounted on the support plate 10 and is used to drive the auger 12 to rotate and drive the slide rod 20 to slide vertically. The extraction assembly 3 is mounted on the operating platform 1 and is used to extract and collect waste gas.

[0043] During the steam extraction remediation of soil 16, the shell 11 is first inserted into the soil 16, and the auger 12 descends with the shell 11. At the same time, the auger 12 is driven to rotate by the drive assembly 4, so that the auger 12 excavates a pit 17 underground during the insertion of the auger into the soil 16. Then, the shell 11 and the auger 12 are moved upward. During the upward movement of the shell 11, the insertion rod 21 extends downward from the shell 11. As the insertion rod 21 separates from the auger 12, the two insertion rods 21 open to both sides and abut against the inner wall of the pit. Finally, the shell 11 drives the insertion rod 21 to press down, inserting the insertion rod 21 into the soil on both sides of the pit, and backfilling the soil scattered at the top of the pit into the pit. At this point, steam is injected into the soil 16 through the nozzle 210 on the insertion rod 21. The steam first diffuses to the sides and around, expanding the repair area. Subsequently, due to the loose soil 16 inside the pit 17, the airflow gradually flows back into the pit 17 and surges upwards. Finally, it leaves the soil 16 and is absorbed by the extraction component 3 to complete the repair. This makes the steam flow path more stable and unaffected by the moisture and compactness of the soil 16, preventing a large amount of exhaust gas from escaping and causing secondary pollution.

[0044] like Figures 1 to 10 As shown:

[0045] The drive assembly 4 includes a first motor 40, a rotating shaft 41, and a pair of bevel gears 42. The top of the first motor 40 is fixedly connected to the bottom of the support plate 10. The rotating shaft 41 is coaxially connected to the output shaft of the first motor 40. The rotating shaft 41 passes through the side wall of the housing 11 and is rotatably connected to it. One bevel gear 42 is coaxially connected to the periphery of the rotating shaft 41, and the other bevel gear 42 is coaxially connected to the top of the hinge column 12. The two bevel gears 42 mesh with each other.

[0046] The drive assembly 4 also includes a screw 43 and a one-way transmission mechanism 44. The bottom of the screw 43 is rotatably connected to the bottom wall of the housing 11. The screw 43 passes through the slide rod 20 and is threadedly connected to it. Both sides of the slide rod 20 have square concave structures, and both sides of the inner wall of the housing 11 have square protruding structures. The protrusions on the inner wall of the housing 11 are engaged with the recesses on the periphery of the slide rod 20. The one-way transmission mechanism 44 is mounted on the rotating shaft 41 and is used to drive the screw 43 to rotate in one direction.

[0047] The one-way transmission mechanism 44 includes a ratchet 440, a toothed ring 441, multiple toothed blocks 442, and multiple springs 443. The ratchet 440 is coaxially connected to the rotating shaft 41, the toothed ring 441 is coaxially connected to the top of the screw 43, and the multiple toothed blocks 442 are circumferentially distributed around the ratchet 440. The toothed blocks 442 are rotatably mounted on the ratchet 440, and the bottom of the toothed blocks 442 meshes with the teeth on the toothed ring 441. The springs 443 are mounted on the toothed blocks 442 and are used to provide thrust for the toothed blocks 442 to rotate and reset.

[0048] The ratchet 440 has multiple grooves 4400 around its periphery. The grooves 4400 are T-shaped. One side of the bottom of the toothed block 442 rotates with the inner wall of the groove 4400, and the bottom of the other side of the toothed block 442 abuts against the inner wall of the groove 4400. One end of the spring 443 is fixedly connected to the center of the bottom of the toothed block 442, and the other end of the spring 443 is fixedly connected to the inner wall of the groove 4400.

[0049] As the housing 11 descends for the first time, the motor is powered on, and its output shaft drives the rotating shaft 41 to rotate clockwise. Through the meshing transmission of two bevel gears 42, the auger 12 is driven to rotate, thereby creating a pit 17 in the soil 16. At this time, although the ratchet 440 rotates with the rotating shaft 41, the slide bar 20 is located at the top of the housing 11 and is in contact with it. This causes the toothed block 442 on the ratchet 440 to contact the teeth on the toothed ring 441. The toothed block 442 repeatedly rotates in the groove 4400 to compress the spring 443, and then, as the spring 443 rebounds, pushes it to rotate back to its original position.

[0050] When the housing 11 descends for the second time, the output shaft of the motor rotates in the opposite direction. At this time, the ratchet 440 rotates in the opposite direction, and the toothed block 442 in its groove 4400 abuts against the inner wall of the T-shaped groove 4400. Figure 10 Point F shows the contact area between the toothed block 442 and the inner wall of the groove 4400, which causes the ratchet 440 and the toothed ring 441 to mesh and drive the screw 43 to rotate. Since the two sides of the slide rod 20 are locked to the inner wall of the housing 11, the slide rod 20 cannot rotate. Through the threaded transmission between the slide rod 20 and the screw 43, the slide rod 20 is driven to slide down and out of the housing 11, thereby pushing the insert rod 21 out of the housing 11 and separating from the hinge 12 to open to both sides.

[0051] like Figures 1 to 11 As shown:

[0052] The injection assembly 2 also includes a steam generator 22, a hose 23, multiple torsion springs 24, a pair of plugs 25, and multiple arc-shaped covers 26. The bottom of the steam generator 22 is fixedly connected to the top of the operating table 1. The air outlet of the steam generator 22 is connected to one end of the hose 23. The other end of the hose 23 passes through the support plate 10 and the housing 11 and is connected to the top of the slide rod 20. The bottom of the slide rod 20 is connected to the top of the insertion rod 21. The top of the insertion rod 21 is rotatably connected to the bottom of the slide plate. Multiple torsion springs 24 are respectively sleeved on both sides of the top of the insertion rod 21. One end of the torsion spring 24 is fixedly connected to the insertion rod 21, and the other end of the torsion spring 24 is fixedly connected to the slide rod 20. The bottom of the insertion rod 21 is fixedly connected to the top of the plug 25. The two plugs 25 are combined to form a conical structure. The top edge of the plug 25 abuts against the bottom of the auger 12. Multiple spray holes 210 are opened on the opposite side of the two insertion rods 21. The arc-shaped cover 26 is located at the bottom of the spray hole and is fixedly connected to the insertion rod 21. One end of the arc-shaped cover 26 is close to the slide rod 20.

[0053] After the slide bar 20 slides down to the bottom of the housing 11, the insertion rod 21 extends out of the helical column 12. At this time, the torsion spring 24 rebounds from its torsional state, causing the insertion rod 21 to rotate, opening the two insertion rods 21 to both sides and pressing against the inner wall of the pit 17. Then, the housing 11 moves down, and the insertion rods 21, under the downward pressure of the housing 11 and the resistance of the soil 16, insert into the soil 16 to both sides. Then, the steam generator 22 is activated, injecting steam into the slide bar 20 through the hose 23 and into the soil 16 through the nozzle 210. The plugs 25 at the bottom of the insertion rods 21 fit together to form a cone, which reduces the resistance of the housing 11 inserting into the soil 16 and prevents the soil 16 from entering the helical column 12. The nozzle 210 is equipped with an arc-shaped cover 26 with its opening facing the slide bar 20, which prevents the nozzle 210 from being blocked when the insertion rods 21 are inserted into the soil 16.

[0054] like Figures 1 to 6 As shown:

[0055] The air extraction assembly 3 includes an annular seat 30, an air collection hood 31, and a scraper 32. One side of the annular seat 30 is fixedly connected to the bottom of the operating table 1. The air collection hood 31 has a semi-circular shell structure. One end of the air collection hood 31 is rotatably connected to the outer periphery of the annular seat 30. The scraper 32 is fixedly connected to the inner wall of the air collection hood 31.

[0056] The air extraction assembly 3 also includes a second motor 33 and a pair of spur gears 34. The bottom of the second motor 33 is fixedly connected to the top of the air collection hood 31. The output shaft of the second motor 33 passes through the top wall of the air collection hood 31 and is coaxially connected to one of the spur gears 34. The other spur gear 34 is fixedly connected to the bottom periphery of the ring seat 30. The two spur gears 34 mesh with each other.

[0057] The exhaust assembly 3 also includes a fan 35, an air duct 36 and a filter plate 37. The bottom of the fan 35 is fixedly connected to the top of the air collection hood 31. The air inlet of the fan 35 is connected to one end of the air duct 36. The other end of the air duct 36 passes through the top wall of the air collection hood 31 and is connected to its interior. The filter plate 37 is fixedly connected to the inner wall of the air duct 36.

[0058] After inserting the insertion rod 21 into the soil 16, the second motor 33 is energized. Its output shaft drives the spur gear 34 to rotate. Through the meshing rotation between the two spur gears 34, the motor makes a circular motion around the annular seat 30, which in turn drives the gas collection hood 31 to rotate around the annular seat 30. The annular seat 30 is designed with a ring shape to facilitate the up-and-down movement of the housing 11. During the rotation, the scraper 32 inside the gas collection hood 31 scrapes the soil 16 back into the pit for backfilling, preventing it from escaping directly from the pit after steam is injected. At the same time, rotating the gas collection hood 31 so that its opening side faces the upwind direction can further collect the exhaust gas and prevent it from escaping.

[0059] The blower 35 is activated, drawing air out of the collection hood 31 through the duct 36 to create negative pressure, thereby absorbing the exhaust gas surging from the bottom of the soil 16. Since the duct 36 is located at the top of the collection hood 31, the high-speed exhaust gas flows upwards as it enters the duct 36, causing soil particles 16 mixed in the exhaust gas to be thrown out of the collection hood 31 by inertia. The remaining soil particles 16 are also filtered out by the filter plate 37, thus removing impurities from the recovered exhaust gas.

[0060] like Figures 1 to 5 As shown:

[0061] It also includes a hydraulic rod 13, a slide rail 14 and a slider 15. The top of the hydraulic rod 13 passes through the top of the operating table 1 and is fixedly connected to it. The telescopic end of the hydraulic rod 13 is fixedly connected to the top of the support plate 10. One end of the support plate 10 is fixedly connected to the slider 15. The slider 15 is slidably connected to the periphery of the slide rail 14. The slide rail 14 is fixedly connected to one end of the operating table 1.

[0062] When the hydraulic rod 13 is activated, its telescopic end pushes the support plate 10 to move up and down, which can drive the housing 11 to move vertically. At the same time, one end of the support plate 10 drives the slider 15 to slide up and down along the slide rail 14. The slider 15 and the slide rail 14 keep the support plate 10 moving stably and prevent the housing 11 from colliding with the annular seat 30 due to deviation.

[0063] It should be stated that the above-described specific embodiments are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to the present invention. However, such variations, as long as they do not depart from the spirit of the present invention, should be within the scope of protection of the present invention. Furthermore, some terminology used in this specification and claims is not limiting, but merely for the purpose of clearly describing the positional relationships and functions of the components.

Claims

1. A steam leaching remediation apparatus for remediation of contaminated soil, characterized by, The utility model provides a kind of injection molding machine, including operation platform (1), support plate (10), shell (11), winding column (12), blowing injection assembly (2), air extraction assembly (3) and drive assembly (4), support plate (10) vertically slidably installed in operation platform (1) one end, shell (11) top and support plate (10) bottom fixed connection, shell (11) is hollow cylindrical structure, winding column (12) is sleeved in shell (11) periphery and is rotationally connected, blowing injection assembly (2) includes slide rod (20) and a pair of insertion rod (21), slide rod (20) and shell (11) inner wall slidingly connected, insertion rod (21) top and slide rod (20) bottom hinged, insertion rod (21) bottom passes through shell (11) bottom wall and is slidably connected with it, insertion rod (21) one side and winding column (12) inner wall mutually resist, drive assembly (4) is installed on support plate (10), drive assembly (4) is used to drive winding column (12) rotation and drive slide rod (20) vertically slide, air extraction assembly (3) is installed on operation platform (1), air extraction assembly (3) is used to suck collection waste gas; Drive assembly (4) includes first motor (40), rotating shaft (41) and a pair of bevel gears (42), drive assembly (4) further includes screw rod (43) and one-way transmission mechanism (44), screw rod (43) bottom and shell (11) bottom wall rotationally connected, screw rod (43) passes through slide rod (20) and is threadedly connected with it, slide rod (20) both sides are square concave structure, shell (11) both sides inner wall are square protruding structure, the protruding portion of shell (11) inner wall and the recess of the periphery of slide rod (20) are clamped and fit, one-way transmission mechanism (44) is installed on rotating shaft (41), one-way transmission mechanism (44) is used to drive screw rod (43) rotation in one direction; Blowing injection assembly (2) further includes steam generator (22), hose (23), multiple torsional springs (24), a pair of plugs (25) and multiple arc covers (26), steam generator (22) bottom and operation platform (1) top fixed connection, steam generator (22) air outlet and hose (23) one end communication, hose (23) other end passes through support plate (10) and shell (11) and is communicated with slide rod (20) top, slide rod (20) bottom and insertion rod (21) top communication, insertion rod (21) top and slide plate bottom rotationally connected, multiple torsional springs (24) are respectively sleeved in insertion rod (21) top both sides, torsional spring (24) one end and insertion rod (21) fixed connection, torsional spring (24) other end and slide rod (20) fixed connection, insertion rod (21) bottom and plug (25) top fixed connection, two plugs (25) combination into a conical structure, plug (25) top edge and winding column (12) bottom mutually resist, the opposite side of two insertion rods (21) is provided with multiple injection holes (210), arc cover (26) is located in the bottom of injection hole and is fixedly connected with insertion rod (21), arc cover (26) opening one end is close to slide rod (20); The air extraction assembly (3) comprises a ring-shaped seat (30), a gas collecting cover (31) and a scraper (32), the ring-shaped seat (30) is fixedly connected to the bottom of the operation table (1) on one side, the gas collecting cover (31) is a semi-circular shell structure, the gas collecting cover (31) is rotatably connected to the outer periphery of the ring-shaped seat (30) on one end, and the scraper (32) is fixedly connected to the inner wall of the gas collecting cover (31).

2. The apparatus for soil remediation by steam stripping according to claim 1, wherein The first motor (40) is fixedly connected to the bottom of the support plate (10) on the top, the rotating shaft (41) is coaxially connected to the output shaft of the first motor (40), the rotating shaft (41) penetrates through the side wall of the shell (11) and is rotatably connected thereto, one of the bevel gears (42) is coaxially connected to the outer periphery of the rotating shaft (41), the other bevel gear (42) is coaxially connected to the top of the winding column (12), and the two bevel gears (42) are meshed with each other.

3. The apparatus for soil remediation by steam stripping according to claim 2, wherein The one-way transmission mechanism (44) comprises a ratchet wheel (440), a tooth ring (441), a plurality of tooth blocks (442) and a plurality of springs (443), the ratchet wheel (440) is coaxially connected to the rotating shaft (41), the tooth ring (441) is coaxially connected to the top of the screw rod (43), the plurality of tooth blocks (442) are circumferentially distributed on the outer periphery of the ratchet wheel (440), the tooth blocks (442) are rotatably installed on the ratchet wheel (440), the bottom of the tooth blocks (442) is meshed with the teeth on the tooth ring (441), and the springs (443) are installed on the tooth blocks (442) and used to provide a pushing force for the rotation reset of the tooth blocks (442).

4. The apparatus for soil remediation by steam stripping according to claim 3, wherein A plurality of grooves (4400) are formed in the outer periphery of the ratchet wheel (440), the grooves (4400) are T-shaped structures, one side of the bottom of the tooth blocks (442) is rotatable with the inner wall of the grooves (4400), the other side of the bottom of the tooth blocks (442) abuts against the inner wall of the grooves (4400), one end of the springs (443) is fixedly connected to the center of the bottom of the tooth blocks (442), and the other end of the springs (443) is fixedly connected to the inner wall of the grooves (4400).

5. The apparatus for soil remediation by steam stripping according to claim 1, wherein The air extraction assembly (3) further comprises a second motor (33) and a pair of spur gears (34), the bottom of the second motor (33) is fixedly connected to the top of the gas collecting cover (31), the output shaft of the second motor (33) penetrates through the top wall of the gas collecting cover (31) and is coaxially connected to one of the spur gears (34), the other spur gear (34) is fixedly connected to the outer periphery of the bottom of the ring-shaped seat (30), and the two spur gears (34) are meshed with each other.

6. The apparatus for soil remediation by steam stripping according to claim 5, wherein The air extraction assembly (3) further comprises a fan (35), an air pipe (36) and a filter plate (37), the bottom of the fan (35) is fixedly connected to the top of the gas collecting cover (31), the air inlet of the fan (35) is in communication with one end of the air pipe (36), the other end of the air pipe (36) penetrates through the top wall of the gas collecting cover (31) and is in communication with the inside of the gas collecting cover (31), and the filter plate (37) is fixedly connected to the inner wall of the air pipe (36).

7. The apparatus for soil remediation by steam stripping according to claim 1, wherein Also include hydraulic rod (13), slide rail (14) and sliding block (15), the top of hydraulic rod (13) passes through the top of operation table (1) and is fixedly connected, the telescopic end of hydraulic rod (13) is fixedly connected with the top of support plate (10), one end of support plate (10) is fixedly connected with sliding block (15), sliding block (15) is slidably connected with the periphery of slide rail (14), and one end of slide rail (14) is fixedly connected with operation table (1).

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