A contaminated soil detection and undisturbed sampling device

Abstract

The present invention relates to the technical field of soil pollution remediation, and in particular to a contaminated soil detection and original state sampling device. The soil sampling device comprises an outer drill tube unit and an inner loading unit clamped in the inner cavity of the outer drill tube unit, and the outer wall of the outer drill tube unit is provided with an outer rotary cutter and the bottom is provided with an outer inclined blade. The outer rotary cutter rotates downward to allow the soil in the middle to enter the inner loading unit in its original state; a driving motor is provided to drive a long rod to drive a soil detection sensor to move up and down, so that the soil pollution value and specific position can be detected; a cylindrical mesh body is provided with a plurality of partition sections along the longitudinal direction, and adjacent partition sections are fixedly connected by electromagnetic strips and Velcro, so that the original state sections of the contaminated soil are collected according to the detection results; a control unit is provided to intelligently control the soil drilling, the interaction of the electromagnetic strips and the up and down movement detection of the soil detection sensor, so that not only the position of the contaminated soil can be accurately obtained, but also the original state of the contaminated soil can be obtained, which saves time and effort and has high efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of soil pollution remediation, and in particular to a device for detecting and sampling contaminated soil. Background Art

[0002] When conducting soil pollution remediation, in order to avoid the difficult-to-control technical drawbacks that may be encountered in in-situ remediation, such as incomplete remediation, over-remediation, and blurred remediation boundaries, ex-situ remediation is often chosen. Therefore, it is often necessary to sample the soil and take the contaminated soil out from a designated underground location before carrying out remediation work. Currently, the soil sampling devices on the market are generally divided into two structures, namely spiral sampling devices and direct-push sampling devices. Although the first type of spiral sampling device can quickly take out the soil at a specified depth, it is easy to cause layer mixing between the contaminated soil and the uncontaminated soil, resulting in increased remediation costs. Although the second type of direct-push sampling device can ensure that the soil layer is relatively fixed, it is easy to cause compression of the original soil during the sampling process, which destroys the physical structure of the soil to a certain extent, resulting in increased difficulty and cost of remediation of the original soil. In addition, the specified depth position of the above sampling needs to be determined by sampling and testing in advance, which further reduces the efficiency of sampling. Summary of the invention

[0003] The invention discloses a contaminated soil detection and undisturbed state sampling device, aiming to solve the technical problems existing in the prior art.

[0004] The present invention adopts the following technical solutions:

[0005] A contaminated soil detection and original sampling device comprises a support frame unit, a soil sampling device installed in the support frame unit, a power device and a soil detection drive device installed on the top plate of the support frame unit, and a control unit for controlling the power device and the soil detection drive device; wherein:

[0006] The power device is connected to the soil sampling device, and the soil detection driving device is fixedly connected to the soil detection sensor through a long rod, so that the soil detection sensor moves along the vertical space provided in the soil sampling device.

[0007] In some embodiments, the soil sampling device includes an outer drill barrel unit and an inner loading unit clamped in the inner cavity of the outer drill barrel unit;

[0008] The outer drill barrel unit comprises a cylindrical drill barrel wall, an outer rotary cutter for drilling soil arranged vertically along the outer wall, an upper groove and a lower groove for hanging the inner loading unit arranged along the inner wall, and a horizontal upper ring platform is also arranged on the top of the cylindrical drill barrel wall;

[0009] The internal loading unit includes a cylindrical mesh body, a plurality of pairs of electromagnetic strips fixed on the cylindrical mesh body, and an upper ring body and a lower ring body movably inserted into the upper groove and the lower groove at the upper and lower ends of the cylindrical mesh body respectively; wherein, the cylindrical mesh body is provided with a plurality of dividing seams located on the horizontal cross section along the longitudinal direction, and pairs of electromagnetic strips are arranged on the upper and lower sides of the seams.

[0010] In some embodiments, the cylindrical mesh body made of plastic material is provided with a plurality of partitioning segments along the longitudinal direction, and the sutures between adjacent partitioning segments are connected by electromagnetic strips and Velcro, so that under the action of external force, two adjacent partitioning segments are disconnected along the sutures.

[0011] In some embodiments, a plurality of pairs of electromagnetic strips are evenly arranged along the circumferential seam according to a preset spacing, and wires are respectively provided at the two longitudinal ends and the horizontal contact end of the electromagnetic strips, and the wires are electrically connected to the control unit, so that under the electrical control of the control unit, the following are achieved: when each pair of the electromagnetic strips are tightly connected to each other up and down, a smooth and complete cylindrical inner surface is formed which rotates downward with the outer drill barrel unit to hold soil; when the contaminated soil segment is collected according to the detection result of the soil detection sensor, the upper and lower suction forces of each pair of the electromagnetic strips on the set seam are controlled to be eliminated, and the left and right ends of the upper electromagnetic strip generate suction forces to attract the adjacent electromagnetic strips to form a circle, thereby tightening the soil segment to obtain the original contaminated soil.

[0012] In some embodiments, at least two spaced-apart long ears arranged in opposite directions are provided between the pairs of electromagnetic strips arranged along the same circumferential direction. The long ears are formed by extending the mesh body at the edge of the separation segment toward each other, and the contact surfaces between the long ears and the adjacent mesh bodies are provided with fixed Velcro.

[0013] In some embodiments, the upper ring body and the lower ring body are symmetrically provided with two fractures, so that the upper ring body and the lower ring body can reduce the outer diameter under the action of external force and be placed in the corresponding upper groove and lower groove of the cylindrical drill tube wall.

[0014] In some embodiments, a connecting turntable is further provided on the upper ring platform, and the connecting turntable is matched and fixedly connected to the upper ring platform, and the connecting turntable is fixedly connected to the output shaft of the power device.

[0015] In some embodiments, a space is provided between the cylindrical drill barrel wall and the cylindrical mesh body, and two guide grooves are vertically symmetrically provided on the inner wall of the cylindrical drill barrel wall, and the guide groove cooperates with a long rod with a soil detection sensor fixed at the lower end, so that the long rod drives the soil detection sensor to move up and down under the drive of the soil detection driving device; a blade is provided at the bottom of the cylindrical drill barrel wall, and the angle θ of the blade is formed by the inner wall tilting outward.

[0016] In some embodiments, the support frame unit includes a support frame located in the middle part for supporting, a top plate fixed on the top of the support frame, and a bottom plate located at the bottom and slidably connected to the support frame; wherein, a space for placing the soil sampling device is provided in the middle part of the support frame, and a central through hole for installing the output shaft of the power device and a folding guide rail for moving the soil detection drive device are provided on the top plate, and the central through hole coincides with the longitudinal center axis of the soil sampling device.

[0017] In some embodiments, the soil detection drive device includes a bottom plate movably placed on the top plate, a bracket fixedly mounted on the bottom plate and equipped with a vertical guide rail, a slider that slides up and down along the vertical guide rail driven by a drive motor and a lead screw, and the long rod fixedly mounted on the slider; wherein a square guide block is provided at the bottom center of the bottom of the bottom plate, and the square guide block moves along the folding guide rail so that the long rod drives the soil detection sensor to measure at two symmetrical sides of the cylindrical mesh body. Beneficial Effects

[0018] The present invention discloses a contaminated soil detection and original state sampling device. The soil sampling device includes an outer drill tube unit and an inner loading unit clamped in the inner cavity of the outer drill tube unit. The outer wall of the outer drill tube unit is vertically provided with an outer rotary cutter for drilling soil. The bottom of the cylindrical drill tube wall is provided with a blade formed by an inclination angle inclined outward from the inner wall. The outer rotary cutter rotates downward under the drive of a power device, so that the soil in the middle enters the inner loading unit in its original state. The long rod with a soil detection sensor at the end is driven up and down by the soil detection drive device, so that soil pollution can be detected, thereby determining the specific location of the contaminated soil. The inner loading unit includes a cylindrical mesh body, and the cylindrical mesh body is provided with a plurality of strips on the horizontal cross section along the longitudinal direction. A split suture is provided, and a pair of electromagnetic strips are arranged on the upper and lower sides of the suture. Adjacent separation sections are connected by the provided electromagnetic strips and Velcro. The contaminated soil sections are collected according to the detection results of the soil detection sensor. The upper and lower suction forces of each pair of the electromagnetic strips on the set suture are controlled to be eliminated. The left and right ends of the upper electromagnetic strip generate suction forces that attract the adjacent electromagnetic strips to form a circle, thereby tightening the bottom of the contaminated soil section and preserving the upper contaminated soil section in its original state. The internal loading unit of the section can be manually taken out. By setting a control unit, the soil drilling, the interaction between the electromagnetic strips and the long rod can be intelligently controlled to drive the soil detection sensor to move up and down, which can not only accurately obtain the position of the contaminated soil, but also ensure that the contaminated soil in its original state is obtained, saving time and effort with high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments, which constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions explain the present invention and do not constitute improper limitations on the present invention. In the drawings:

[0020] Figure 1 A schematic diagram of the structure of the technical solution provided by an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of a soil drilling state structure provided by an embodiment of the present invention;

[0022] Figure 3 for Figure 1 AA section view;

[0023] Figure 4 for Figure 1 BB cross-sectional view;

[0024] Figure 5 The schematic diagram of the technical solution structure of the bottom plate;

[0025] Figure 6 for Figure 1 X-enlarged image of

[0026] Figure 7 for Figure 1 A magnified image of S;

[0027] Figure 8 for Figure 7 EE cross-sectional view;

[0028] Fig. 9 for Figure 1 MM cross-sectional view;

[0029] Fig.10 for Figure 1 NN cross-sectional view;

[0030] Fig.11 It is a schematic diagram of the technical solution structure of the internal loading unit;

[0031] Fig.12 It is a schematic diagram of the technical solution structure of the outer drill barrel unit;

[0032] Fig.13 This is a schematic diagram of the technical solution structure for tightening the bottom of the contaminated soil section and then lifting it up.

[0033] In the figure:

[0034] Support frame unit 1; top plate 11; folding guide rail 111; horizontal rail 1111; vertical rail 1112; central through hole 112; support frame 12; bottom plate 13; movable groove 131; bottom through hole 132; soil sampling device 2; outer drill tube unit 21; upper ring platform 211; upper groove 212; inner cavity 213; guide groove 214; outer rotary knife 215; lower groove 216; blade 217; cylindrical drill tube wall 218; connecting through hole 219; inner loading unit 22; upper ring body 221; through hole 2211; fracture 2212; lower ring body 222; hook and loop 223; electromagnetic strip 224; upper Electromagnetic strip 2241; lower electromagnetic strip 2242; wire 2243; cylindrical mesh body 225; suture 2251; long ear 2252; upper segment 2253; lower segment 2254; space 23; power device 3; servo motor 31; transmission shaft 311; connecting turntable 312; soil detection drive device 4; bracket 41; vertical guide rail 42; slider 43; bottom plate 44; square guide block 441; drive motor 45; long rod 46; screw 47; fastener 5; controller 6; soil 7; contaminated soil 71; uncontaminated soil 72; soil detection sensor 8. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in combination with the specific embodiments of the present invention and the corresponding drawings; in the description of the present invention, it should be noted that the "including" mentioned in the specification and claims is an open term, so it should be interpreted as "including but not limited to"; "several" refers to no less than 4.

[0036] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0037] Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] like Figure 1-Figure 13 As shown, the technical solution disclosed in the present invention is:

[0039] A contaminated soil detection and original state sampling device, comprising a support frame unit 1, a soil sampling device 2 installed in the support frame unit 1, a power device 3 and a soil detection drive device 4 installed on a top plate 11 of the support frame unit 1, and a controller 6 for controlling the power device 3 and the soil detection drive device 4; wherein:

[0040] The servo motor 31 provided in the power device 3 is connected to the soil sampling device 2 , and the soil detection driving device 4 is fixedly connected to the soil detection sensor 8 through a long rod 46 , so that the soil detection sensor 8 moves along the vertical space 23 provided in the soil sampling device 2 .

[0041] like Figure 1-Figure 13 As shown, the preferred embodiment of the present invention:

[0042] A contaminated soil detection and undisturbed sampling device comprises a support frame unit 1, a soil sampling device 2 installed in the support frame unit 1, a power device 3 and a soil detection drive device 4 installed on a top plate 11 of the support frame unit 1, and a controller 6 for controlling the power device 3 and the soil detection drive device 4.

[0043] The soil sampling device 2 includes an outer drill tube unit 21 and an inner loading unit 22 mounted in the inner cavity of the outer drill tube unit 21 .

[0044] The outer drill barrel unit 21 includes a cylindrical drill barrel wall 218 made of metal, an outer rotary cutter 215 for drilling soil vertically arranged along the outer wall, an inner cavity 213, an upper groove 212 and a lower groove 216 arranged along the inner wall for hanging the inner loading unit 22, and a horizontally placed upper ring platform 211 is also provided on the top of the cylindrical drill barrel wall 218, and a connecting through hole 219 is also provided on the upper ring platform 211.

[0045] The upper ring platform 211 is also provided with a connecting turntable 312, and the connecting turntable 312 is fixedly connected to the upper ring platform 211 through the fastener 5 and the connecting through hole 219, and the connecting turntable 312 is fixedly connected to the transmission shaft 311 of the servo motor 31 of the power device 3. Figure 2 shown.

[0046] A cylindrical mesh body 225 made of plastic material is placed in the inner cavity 213 of the cylindrical drill barrel wall 218, a space 23 is provided between the inner wall of the cylindrical drill barrel wall 218 and the outer wall of the cylindrical mesh body 225 made of plastic material, and two guide grooves 214 are vertically symmetrically provided on the inner wall of the cylindrical drill barrel wall 218, the guide grooves 214 are clearance-matched with a long rod 46 with a soil detection sensor 8 fixed at the lower end, so that the long rod 46 drives the soil detection sensor 8 to move up and down under the drive of the soil detection drive device 4; a blade 217 is provided at the bottom end of the cylindrical drill barrel wall 218, and the blade 217 is inclined from the inner wall to the outside and upward to form an acute angle θ, so that the outer rotary knife 215 rotates downward under the drive of the servo motor 31, so that the soil 7 in the middle enters the inner cavity of the internal loading unit 22 as it is, and the excavated soil 7 flows out along the outer rotary knife 215, as shown in FIG. Figure 1-Figure 2 , Figure 6-Figure 8 shown.

[0047] The internal loading unit 22 includes a cylindrical mesh body 225 made of plastic material, a plurality of pairs of electromagnetic strips 224 annularly fixed to the cylindrical mesh body 225, and an upper ring body 221 and a lower ring body 222 located at the upper and lower ends of the cylindrical mesh body 225. The upper ring body 221 and the lower ring body 222 are respectively movably inserted in the upper groove 212 and the lower groove 216 of the cylindrical drill tube wall 218. In this embodiment, four pairs of electromagnetic strips 224 arranged upper and lower are selected.

[0048] According to the soil conditions, a number of equidistant partitions are provided along the longitudinal direction of the cylindrical mesh body 225 made of plastic material, and a horizontal cross section k is provided between adjacent partitions for isolation, and the horizontal cross section k is where the suture 2251 is arranged. The adjacent partitions are fixedly connected by the provided electromagnetic strips 224 and the Velcro 223. Four pairs of electromagnetic strips 224 are evenly distributed on the upper and lower sides of a horizontal suture 2251, and each pair of electromagnetic strips 224 is formed by the attraction of an upper electromagnetic strip 2241 and a lower electromagnetic strip 2242, and the upper electromagnetic strip 2241 and the lower electromagnetic strip 2242 are the same; the spacing range of the partitions is set to 5 cm to 15 cm, preferably 10 cm, the thickness of a single electromagnetic strip h≤0.5 cm, and the circumferential spacing of the electromagnetic strips 224 is determined according to the properties of the soil 7, such as Fig.10 , Fig.11 shown.

[0049] The upper electromagnetic strip 2241 and the lower electromagnetic strip 2242 of the paired electromagnetic strips 224 are respectively arranged in a circular direction on the cylindrical mesh body 225 on both sides of the suture 2251, and are aligned up and down. The four pairs of electromagnetic strips 224 are arranged at equal intervals along the annular wall. The two longitudinal ends and the horizontal contact ends of the electromagnetic strips 224 are respectively connected to wires 2243, and the wires 2243 are electrically connected to the controller 6.

[0050] At least two spaced-apart long ears 2252 are arranged in opposite directions between adjacent pairs of electromagnetic strips 224 arranged in the same circumferential direction. The long ears 2252 are formed by the mesh bodies of the upper segment 2253 and the lower segment 2254 extending toward each other, and the contact surfaces of the long ears 2252 and the adjacent mesh bodies are provided with fixed hooks 223, so that when subjected to longitudinal force, the mesh bodies at the two edges of the segment are subjected to the reverse pulling force of the long ears 2252, and the joint is more compact, such as Fig. 9 shown.

[0051] The upper ring body 221 and the lower ring body 222 are both provided with two symmetrical breaks 2212, so that the upper ring body 221 and the lower ring body 222 can be reduced in outer diameter under manual action and placed in the corresponding upper groove 212 and lower groove 216 provided on the cylindrical drill tube wall 218.

[0052] The upper ring body 221 is provided with two through holes 2211 symmetrically with respect to the central axis. The through holes 2211 are clearance-matched with the long rod 46, so that the long rod 46 can move up and down in the space 23. Figure 1 shown.

[0053] The support frame unit 1 includes a support frame 12 located in the middle part for supporting, a top plate 11 fixed on the top of the support frame 12, and a bottom plate 13 located at the bottom and slidably connected to the support frame 12. The bottom plate 13 has a supporting function to prevent the support frame unit 1 from sinking during operation, and a bottom through hole 132 is provided in the middle of the bottom plate 13; a space for placing the soil sampling device 2 is provided in the middle of the support frame 12, and a movable groove 131 is provided in the longitudinal direction on the bottom plate 13. After the contaminated soil 71 is collected, the support frame 12 and the mounting components on the top are removed to facilitate manual removal of the collected original contaminated soil 71, such as Fig.13 shown.

[0054] The top plate 11 is provided with a central through hole 112 for installing the transmission shaft 311 of the servo motor 31 and a folding guide rail 111 for moving the soil detection drive device 4, and the central through hole 112 coincides with the longitudinal center axis of the soil sampling device 2, and the folding guide rail 111 includes a transverse rail 1111 and vertical rails 1112 located at both ends of the transverse rail 1111.

[0055] The soil detection driving device 4 includes a bottom plate 44 movably placed on the top plate 11 , and a square guide block 441 is vertically provided at the bottom center of the bottom plate 44 . The side length of the square guide block 441 matches the width of the horizontal rail 1111 and the vertical rail 1112 .

[0056] A bracket 41 is fixedly mounted on the upper surface of the bottom plate 44, a vertical guide rail 42 is fixedly mounted on the bracket 41, a lead screw 47 is mounted on the vertical guide rail 42, a slider 43 is mounted on the lead screw 47, a driving motor 45 is mounted on the bottom plate 44, the driving motor 45 drives the lead screw 47 to rotate, and the slider 43 slides up and down along the vertical guide rail 42, a long rod 46 is fixedly mounted on the slider 43, a soil detection sensor 8 is mounted on the lower end of the long rod 46, and the long rod 46 drives the soil detection sensor 8 under the drive of the driving motor 45 The detection is carried out along the vertical movement outside of the cylindrical mesh body 225, and the long rod 46 moves up and down between the two adjacent pairs of electromagnetic strips 224 to obtain the soil pollution data at the depth on the right side. At this time, the square guide block 441 is located at the end of the vertical rail 1112 on the right side; after the driving motor 45 drives the soil detection sensor 8 to rise, under the push of external force, when the square guide block 441 reaches the vertical rail 1112 on the left side along the horizontal rail 1111, the long rod 46 drives the soil detection sensor 8 to move vertically along the outside of the cylindrical mesh body 225 for detection under the drive of the driving motor 45, and obtains the soil pollution data at the depth on the left side. The detection indicators on the symmetrical sides outside the cylindrical mesh body 225 can be obtained to roughly determine the contaminated depth of the soil column.

[0057] It should be noted that: when the soil 7 pollution data on the left and right sides meet the standard requirements, the horizontal plane above the lowest depth is the polluted soil 71, and the horizontal plane below the lowest depth is the unpolluted soil 72. The polluted soil 71 will be sampled and collected in its original state. The soil 7 pollution data includes the required heavy metal data and pH data. The critical value of soil heavy metal element pollution is implemented according to the soil environmental quality agricultural land soil pollution risk control standard, such as Figure 1 , Figure 4 , Figure 5 , Fig.13 shown.

[0058] The servo motor 31 , the drive motor 45 and the soil detection sensor 8 are all controlled and connected by the controller 6 , and the controller includes a microcomputer.

[0059] Specific working process:

[0060] The controller 6 is started to control the servo motor 31 to drive the connection turntable 312 and the soil sampling device 2 to rotate. Under the joint action of the blade 217 of the outer drill tube unit 21 and the outer rotary knife 215, the soil sampling device 2 rotates downward. When the soil height obtained in the soil sampling device 2 meets the preset requirements, the connection turntable 312 fixedly connected to the outer drill tube unit 21 is manually removed; the square guide block 441 of the bottom plate 44 of the soil detection drive device 4 is located at the end of the vertical rail 1112 on the right side, and the controller 6 controls the drive motor 45 to execute the command, driving the long rod 46 to drive the soil detection sensor 8 Move downward along the space 23 on the right side of the cylindrical mesh 225 for detection, and obtain the heavy metal components and pH values ​​at different preset depths inside the cylindrical mesh 225. When the display index meets the requirements, the horizontal line at this position is the right dividing line between the contaminated soil 71 and the uncontaminated soil 72. After the controller 6 controls the driving motor 45 to drive the soil detection sensor 8 to rise, under manual push, the square guide block 441 reaches the end of the vertical rail 1112 on the left along the horizontal rail 1111. Driven by the driving motor 45, the long rod 46 drives the soil detection sensor 8 to move downward along the space 23 on the left side of the cylindrical mesh 225 for detection, and obtain the heavy metal components and pH values ​​at different preset depths inside the cylindrical mesh 225. When the display index meets the requirements, the horizontal line at this position is the left dividing line between the contaminated soil 71 and the uncontaminated soil 72. The lowest dividing line between the left dividing line and the right dividing line is taken as the final dividing line between the contaminated soil 71 and the uncontaminated soil 72 (not shown in the figure).

[0061] When collecting undisturbed contaminated soil, the first horizontal cross section k or the second horizontal cross section k at the lower end of the final dividing line is usually selected as the collection dividing line. The diameter of the collection line is determined according to the soil conditions, with the principle of not affecting the physical structure of the undisturbed contaminated soil to be tested.

[0062] The controller 6 controls each pair of electromagnetic strips 224 located on the folding dividing line to eliminate the upper and lower suction forces. The left and right ends of the upper electromagnetic strip 2241 generate suction forces to attract the adjacent electromagnetic strips to form a circle, thereby tightening the soil segment to obtain the original contaminated soil. The other pairs of electromagnetic strips are still tightly connected up and down to maintain the inner surface of the cylinder containing the original contaminated soil 71; the support frame 12 is pushed to shift backward along the movable groove 131 on the bottom plate 13, so as to manually take out the inner loading unit 22 containing the original contaminated soil 71 and place it in the corresponding matching placement box (not shown in the figure) to wait for detection.

[0063] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A contaminated soil detection and undisturbed sampling device, characterized in that: It includes a support frame unit, a soil sampling device installed in the support frame unit, a power device and a soil detection drive device installed on the top plate of the support frame unit, and a control unit for controlling the power device and the soil detection drive device; wherein, The soil sampling device comprises an outer drill barrel unit and an inner loading unit clamped in the inner cavity of the outer drill barrel unit; The outer drill barrel unit comprises a cylindrical drill barrel wall and an outer rotary cutter for drilling soil arranged vertically along the outer wall; a blade is arranged at the bottom of the cylindrical drill barrel wall, and an angle θ of the blade is formed by the inner wall tilting outward; The internal loading unit comprises a cylindrical mesh body and a plurality of pairs of electromagnetic strips fixedly mounted on the outer surface of the cylindrical mesh body; The cylindrical mesh body made of plastic material is provided with a plurality of partitioning sections along the longitudinal direction, and the sutures located on the horizontal cross section between adjacent partitioning sections are fixedly connected by electromagnetic strips and Velcro, and pairs of electromagnetic strips are provided on the upper and lower sides of the sutures, and the plurality of pairs of electromagnetic strips are evenly arranged along the sutures according to a preset spacing, and the two longitudinal ends and the horizontal contact ends of the electromagnetic strips are respectively provided with wires, and the wires are electrically connected to the control unit, so that under the electrical control of the control unit, the following are achieved: when each pair of the electromagnetic strips is tightly connected to each other up and down, a smooth and complete cylindrical inner surface is formed to rotate downward with the outer drill tube unit for containing soil; when the contaminated soil segment is collected according to the detection result of the soil detection sensor, the upper and lower suction of each pair of the electromagnetic strips on the set suture is controlled to be eliminated, and the two adjacent partitioning sections are disconnected along the sutures, and the left and right longitudinal ends of the upper electromagnetic strip generate suction and attract the adjacent electromagnetic strips to form a circle, thereby tightening the soil segment to obtain the original contaminated soil; The top plate is provided with a central through hole for mounting the output shaft of the power device and a folding guide rail for moving the soil detection drive device, and the central through hole coincides with the longitudinal central axis of the soil sampling device. The power device is connected to the soil sampling device, and the soil detection drive device is fixedly connected to the soil detection sensor through a long rod, so that the soil detection drive device drives the soil detection sensor to move to the two symmetrical sides of the cylindrical mesh body for measurement.

2. The contaminated soil detection and undisturbed sampling device according to claim 1, characterized in that: The cylindrical drill tube wall is provided with an upper groove and a lower groove along the inner wall for hanging the inner loading unit, and the top of the cylindrical drill tube wall is also provided with a horizontal upper ring platform; The upper and lower ends of the cylindrical mesh body are respectively provided with an upper ring body and a lower ring body movably inserted into the upper groove and the lower groove. The upper ring body and the lower ring body are symmetrically provided with two fractures, so that the upper ring body and the lower ring body can reduce the outer diameter under the action of external force and then be placed in the corresponding upper groove and lower groove of the cylindrical drill tube wall.

3. The contaminated soil detection and undisturbed sampling device according to claim 2, characterized in that: At least two spaced-apart long ears arranged in opposite directions are provided between the paired electromagnetic strips arranged in the same circumferential direction. The long ears are formed by extending the mesh body at the edge of the separation section toward each other, and the contact surfaces between the long ears and the adjacent mesh body are both provided with fixed hooks.

4. The contaminated soil detection and undisturbed sampling device according to claim 2, characterized in that: The end of the output shaft of the power device is also fixedly connected with a connecting turntable, and the connecting turntable is located on the upper ring platform and is matched and fixedly connected with the upper ring platform.

5. The contaminated soil detection and undisturbed sampling device according to claim 2, characterized in that: A space is provided between the cylindrical drill barrel wall and the cylindrical mesh body, and two guide grooves are vertically symmetrically provided on the inner wall of the cylindrical drill barrel wall. The guide groove is clearance-matched with a long rod with a soil detection sensor fixed at the lower end, so that the long rod drives the soil detection sensor to move up and down under the drive of the soil detection driving device.

6. The contaminated soil detection and undisturbed sampling device according to claim 5, characterized in that: The support frame unit includes a support frame located in the middle part for supporting, the top plate fixed on the top of the support frame, and a bottom plate located at the bottom and slidably connected to the support frame; wherein, a space for placing the soil sampling device is provided in the middle part of the support frame.

7. The contaminated soil detection and undisturbed sampling device according to claim 6, characterized in that: The soil detection driving device includes a bottom plate movably placed on the top plate, a bracket fixedly mounted on the bottom plate and equipped with a vertical guide rail, a slider that slides up and down along the vertical guide rail driven by a drive motor and a lead screw, and the long rod fixedly mounted on the slider; wherein a square guide block is provided at the center of the bottom of the bottom plate, and the square guide block moves along the folding guide rail.

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