Soil pollution detection sampling device

Abstract

The invention discloses a soil pollution detection sampling device, and relates to the field of soil detection sampling, the soil pollution detection sampling device comprises a mounting seat plate and a driving motor fixedly assembled at the bottom of the mounting seat plate, the output end of the driving motor is fixedly provided with a driving shaft, and the end, away from the driving motor, of the driving shaft is fixedly provided with a rotary drum; a driving motor is fixedly arranged at one end of the mounting seat plate, a rotary drum is arranged in the mounting seat plate, a plurality of spiral threaded strips are fixedly arranged on the outer surface of the rotary drum, a cutting knife rest is fixedly arranged at the end, away from the driving motor, of the rotary drum, and four stand columns distributed in a matrix mode are slidably inserted into the mounting seat plate. The sampling unit is arranged in the drilling hole, the drilling hole is formed, the rotary drum stably stays in the drilling hole, the sampling unit is triggered through the driving unit, the sampling unit directly collects a hard soil layer sample in the drilling hole at the depth, and therefore the effect of accurate collection is achieved.

Description

Technical Field

[0001] This invention relates to the field of soil testing and sampling, specifically to a soil pollution testing and sampling device. Background Technology

[0002] Hard soil layers have low surface permeability, but can seep downwards through soil cracks in arid regions. Pollutants may remain on the surface for a long time or accumulate deep within the hard soil layer, forming localized high-concentration pollution areas. Because the soil in arid regions is hard, sampling the hard soil layer is different from soil sampling in other regions. Due to the drought, the soil layer is hard and cannot be directly sampled by cuttings. Instead, an electric sampler is needed to drill into the hard soil layer to obtain samples from within the soil layer in arid regions.

[0003] Existing technologies can control the drilling depth in hard soil layers. However, when the rotary drill is drilling downwards, the hard soil layer inside the borehole is mixed, meaning that the upper and lower soil layers are mixed together. If workers need to collect soil samples at a certain depth (such as 0.3m, 0.5m, etc.) below the hard soil layer, they cannot accurately collect samples at the corresponding depth, and the samples obtained are all mixed soil. If samples need to be collected at a precise depth, the loose soil inside the borehole needs to be removed manually, and then the soil inside the borehole at that depth needs to be excavated, which is an extremely troublesome process. Summary of the Invention

[0004] The purpose of this invention is to provide a soil pollution detection and sampling device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a soil pollution detection and sampling device, comprising: a mounting base plate and a drive motor fixedly mounted on the bottom of the mounting base plate; a drive shaft is fixedly mounted on the output end of the drive motor, and a rotating drum is fixedly mounted on the end of the drive shaft away from the drive motor; a plurality of spiral threaded strips are fixedly mounted on the outer surface of the rotating drum; a cutting blade holder is fixedly mounted on the end of the rotating drum away from the drive motor; four columns arranged in a matrix are slidably inserted inside the mounting base plate, and a base is fixedly mounted on the bottom of the four columns; a central hole is opened in the center of the base, through which the rotating drum drills a hole toward the hard soil layer; a handle is also designed on the top of the mounting base plate, which facilitates the lifting or lowering of the drive motor by the operator; and a foot pedal is fixedly mounted on the side wall of the base, which is used by the operator to step on, thereby improving the stability of the mounting base plate, the base, and the columns. It also includes: a sampling unit for collecting samples of hard soil layers inside the borehole, the sampling unit being located at one end of the rotary drum near the cutting tool holder; A drive unit is used to drive the sampling unit to extend into the hard soil layer inside the borehole to perform sampling operations. The drive unit is located at the end of the rotary drum away from the cutting tool holder.

[0006] Preferably, the sampling unit includes a cylindrical cavity formed inside the rotating cylinder, the cylindrical cavity being coaxial with the rotating cylinder, a sliding column being slidably fitted below the cylindrical cavity, a plurality of connecting rods being inserted into the side wall of the sliding column at equal intervals around the circumference, and a plurality of receiving cavities for accommodating the connecting rods being formed in the side wall of the cylindrical cavity, the receiving cavities being distributed around the bottom periphery of the cylindrical cavity, each receiving cavity having a limiting groove inside, and a sampling arc plate being slidably inserted inside the limiting groove, the lower end of the sampling arc plate being slidably inserted through the rotating cylinder, the end of the connecting rod away from the sliding column being perpendicularly fixed to the limiting groove, and a plurality of sliders being fixedly installed on the outer wall of the sliding column, and the plurality of sliders being slidably embedded in the interior of the plurality of receiving cavities respectively, the initial state of the sampling arc plate being retracted inside the rotating cylinder, and its bottom surface being coplanar with the bottom surface of the rotating cylinder.

[0007] Preferably, a plurality of sampling frames are fixedly arranged in a straight line at equal intervals at one end of the sampling arc plate near the sliding column. The bottom surface of the bottommost sampling frame is coplanar with the bottom surface of the sampling arc plate. When the sampling arc plate is not in use, it will not affect the normal drilling of the rotary drum.

[0008] Preferably, the sampling arc plate is set at an acute angle to the axis of the sliding column, the end of the connecting rod away from the sampling arc plate is slidably inserted into the interior of the sliding column, and a first spring is fixedly provided between the end of the connecting rod away from the sampling arc plate and the sliding column. When the sampling arc plate with the acute angle design extends from the bottom of the rotating cylinder, the exposed ends of several sampling arc plates can converge in a conical shape.

[0009] Preferably, the driving unit includes a slide rod fixedly mounted on the top of the slide column, and a limiting sleeve plate that is slidably fitted outside the rotating cylinder is fixedly mounted on the other end of the slide rod. A retaining ring is also fixedly mounted inside the cylindrical cavity, and the retaining ring is located between the limiting sleeve plate and the slide column. The slide rod moves through the retaining ring, and a tension spring is fixedly mounted between the slide column and the retaining ring. A limiting component to prevent the slide column from retracting is also provided between the slide rod and the rotating cylinder, as well as a hammering component to cause the slide rod to move downward. Whenever the hammering component strikes the upper surface of the limiting sleeve plate, the slide rod moves downward slightly.

[0010] Preferably, the limiting component includes a limiting ring fixedly fitted on the outer surface of the rotating cylinder, and the limiting ring is located at the upper end of several threaded strips. A hollow ring body is slidably fitted on the outside of the slide rod, and the upper and lower end faces of the hollow ring body are consistent with the upper and lower end faces of the limiting ring. The hollow ring body is fixed inside the cylindrical cavity. A slide plate is radially slidably fitted inside the hollow ring body, and a limiting ratchet is fixedly provided at the end of the slide plate near the slide rod. The limiting ratchet moves through the hollow ring body. Several ratchet grooves are provided at the end of the slide rod near the slide plate, and the limiting ratchet engages with the ratchet grooves. A pull rod is fixedly provided at the end of the slide plate away from the slide rod, which slides through the hollow ring body and the limiting ring. A second spring is also fixedly provided between the end of the slide plate away from the slide rod and the hollow ring body. By limiting the ratchet grooves with the limiting ratchet, the slide rod can only slide downwards and cannot move upwards.

[0011] Preferably, the hammering component includes a gantry frame fixedly mounted outside the drive shaft. The gantry frame is located above the rotating drum and is inverted. Two symmetrically distributed optical axes are slidably fitted at the upper end of the gantry frame, and a hammering block is fixedly mounted at the lower end of the optical axis, which is in movable contact with the upper surface of the limiting sleeve. A third spring is fixedly mounted between the upper surface of the hammering block and the gantry frame. The end of the optical axis away from the hammering block is a vertical bend, and a connecting rod is fixedly mounted between the two vertical bends. A rotating shaft is also rotatably mounted on the outer wall of the drive shaft. The rotating shaft is perpendicular to the drive shaft. A cam that actuates the connecting rod is fixedly mounted on the outer surface of the rotating shaft. The difference between the maximum and minimum radii of the cam is consistent with the maximum distance the optical axis descends.

[0012] Preferably, both ends of the rotating shaft are fixedly provided with hexagonal nuts, and the rotating shaft can be quickly rotated by engaging the crank wrench with the hexagonal nuts.

[0013] Preferably, a cleaning collar is slidably fitted on the outer surface of the rotating drum. The inner wall of the cleaning collar has several spiral grooves distributed equidistantly in a circle, and the spiral grooves are slidably assembled with several threaded strips. The cleaning collar is located at the lower end of the limiting ring. Several levers distributed equidistantly in a circle are fixedly provided on the outer wall of the cleaning collar. Magnetic blocks are fixedly embedded on the lower end face of the limiting ring and the upper end face of the cleaning collar. The magnetic poles of the two sets of magnetic blocks distributed vertically are opposite. The levers rotate the cleaning collar, and the hard soil residue adhering to the surface of the rotating drum and threaded strips can be removed during the rotation.

[0014] Preferably, the lower outer edge of the cleaning ring is concave arc-shaped, which allows the hard soil residue accumulated at the bottom of the cleaning ring to fall off automatically.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention enables the rotary drum to quickly drill into hard soil layers and form a borehole through the action of the cutting blade holder and the threaded strip. The rotary drum is then stably positioned inside the borehole. The sampling unit is triggered by the drive unit, allowing the sampling unit to directly collect samples of the hard soil layer inside the borehole at that depth, thereby achieving a precise sampling effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the threaded strip and cutting tool holder structure of the present invention; Figure 3 This is a schematic diagram of the cleaning collar and threaded groove structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the rotating drum of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 For the present invention Figure 4 Enlarged view at point B in the middle; Figure 7 This is a schematic diagram of the hammer block and cam structure of the present invention; Figure 8 This is a schematic diagram of the sampling frame structure of the present invention; Figure 9 This is a top view of the sampling arc plate and sampling frame of the present invention; Figure 10 This is a schematic diagram of the extended state structure of several sampling arc plates of the present invention.

[0017] In the diagram: 1. Mounting plate; 2. Drive motor; 3. Drive shaft; 4. Rotary drum; 5. Threaded strip; 6. Cutting tool holder; 7. Column; 8. Base; 9. Limiting ring; 10. Cleaning collar; 11. Spiral groove; 12. Lever; 13. Sliding column; 14. Sliding rod; 15. Snap ring; 16. Tension spring; 17. Connecting rod; 18. First spring; 19. Receiving cavity; 20. Limiting groove; 21. Sampling arc plate; 22. Slider; 23. Hollow ring body; 24. Sliding plate; 25. Second spring; 26. Pull rod; 27. Limiting ratchet; 28. Racket groove; 29. ​​Sampling frame; 30. Limiting collar; 31. Gantry frame; 32. Optical axis; 33. Third spring; 34. Hammering block; 35. Rotating shaft; 36. Cam; 37. Connecting rod. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figures 1-9 The illustrated soil pollution detection and sampling device includes: a mounting plate 1 and a drive motor 2 fixedly mounted on the bottom of the mounting plate 1. A drive shaft 3 is fixedly mounted on the output end of the drive motor 2, and a rotating drum 4 is fixedly mounted on the end of the drive shaft 3 away from the drive motor 2. Multiple spiral threaded strips 5 are fixedly mounted on the outer surface of the rotating drum 4. A cutting blade holder 6 is fixedly mounted on the end of the rotating drum 4 away from the drive motor 2. Four columns 7 are slidably inserted inside the mounting plate 1 in a matrix distribution, and a base 8 is fixedly mounted on the bottom of the four columns 7. A central hole is opened in the center of the base 8, through which the rotating drum 4 drills into the hard soil layer. A handle is also designed on the top of the mounting plate 1, which makes it convenient for workers to lift or lower the drive motor 2. A foot pedal is also fixedly mounted on the side wall of the base 8, which is used by workers to step on it, thereby improving the stability of the mounting plate 1, the base 8 and the columns 7. It also includes: a sampling unit for collecting samples of hard soil layers inside the borehole, the sampling unit being located at one end of the rotary drum 4 near the cutting tool holder 6; The drive unit is used to drive the sampling unit to extend into the hard soil layer inside the borehole for sampling operations. The drive unit is located at the end of the rotary drum 4 away from the cutting tool holder 6.

[0020] The sampling unit includes a cylindrical cavity inside the rotating cylinder 4, which is coaxial with the rotating cylinder 4. A sliding column 13 is slidably installed below the cylindrical cavity. Several connecting rods 17 are inserted into the side wall of the sliding column 13 in a circularly equidistant manner. Several receiving cavities 19 for accommodating the connecting rods 17 are opened on the side wall of the cylindrical cavity. The receiving cavities 19 are distributed around the bottom periphery of the cylindrical cavity. Each receiving cavity 19 has a limiting groove 20 inside, and a sampling arc plate 21 is slidably inserted into the limiting groove 20. The lower end of the sampling arc plate 21 slides through the rotating cylinder 4. The end of the connecting rod 17 away from the sliding column 13 is fixed perpendicularly to the limiting groove 20. Several sliders 22 are also fixedly installed on the outer wall of the sliding column 13. The sliders 22 are slidably embedded in the receiving cavities 19 respectively. The initial state of the sampling arc plate 21 is retracted inside the rotating cylinder 4, and its bottom surface is coplanar with the bottom surface of the rotating cylinder 4.

[0021] Several sampling frames 29 are fixedly installed at one end of the sampling arc plate 21 near the sliding column 13, and the bottom surface of the sampling frame 29 located at the bottom is coplanar with the bottom surface of the sampling arc plate 21. When the sampling arc plate 21 is not in use, it will not affect the normal drilling of the rotating drum 4.

[0022] The drive unit includes a slide rod 14 fixedly mounted on the top of the slide column 13, and a limiting sleeve 30 that is slidably fitted onto the outside of the rotating cylinder 4 is fixedly mounted on the other end of the slide rod 14. A retaining ring 15 is also fixedly mounted inside the cylindrical cavity, and the retaining ring 15 is located between the limiting sleeve 30 and the slide column 13. The slide rod 14 moves through the retaining ring 15, and a tension spring 16 is fixedly mounted between the slide column 13 and the retaining ring 15. A limiting component to prevent the slide column 13 from retracting is also provided between the slide rod 14 and the rotating cylinder 4, as well as a hammering component to cause the slide rod 14 to move downward. Whenever the hammering component strikes the upper surface of the limiting sleeve 30, the slide rod 14 moves downward slightly.

[0023] The limiting component includes a limiting ring 9 fixedly fitted onto the outer surface of the rotating cylinder 4, and the limiting ring 9 is located at the upper end of several threaded strips 5. A hollow ring body 23 is slidably fitted onto the outside of the slide rod 14, and the upper and lower end faces of the hollow ring body 23 are consistent with the upper and lower end faces of the limiting ring 9. The hollow ring body 23 is fixed inside the cylindrical cavity. A slide plate 24 is radially slidably embedded inside the hollow ring body 23, and a limiting ratchet 27 is fixedly provided at one end of the slide plate 24 near the slide rod 14. The limiting ratchet 27 movably passes through the hollow ring body 23. The slide bar 14 has several ratchet grooves 28 that are equidistantly distributed in a straight line at one end near the slide plate 24, and the limiting ratchet 27 is in active engagement with the ratchet grooves 28. The slide plate 24 is fixedly provided with a pull rod 26 that slides through the hollow ring 23 and the limiting ring 9 at one end away from the slide bar 14. A second spring 25 is also fixedly provided between the end of the slide plate 24 away from the slide bar 14 and the hollow ring 23. By limiting the ratchet grooves 28 with the limiting ratchet 27, the slide bar 14 can only slide downwards and cannot move upwards.

[0024] The hammering component includes a gantry frame 31 fixedly mounted outside the drive shaft 3. The gantry frame 31 is located above the rotating drum 4 and is inverted. Two symmetrically distributed optical shafts 32 are slidably mounted on the upper end of the gantry frame 31. A hammering block 34 is fixedly mounted on the lower end of the optical shaft 32 and is in movable contact with the upper end surface of the limiting sleeve 30. A third spring 33 is fixedly mounted between the upper end surface of the hammering block 34 and the gantry frame 31. The end of the optical shaft 32 away from the hammering block 34 is a vertical bend, and a connecting rod 37 is fixedly mounted between the two vertical bends. A rotating shaft 35 is also rotatably mounted on the outer wall of the drive shaft 3. The rotating shaft 35 is perpendicular to the drive shaft 3. A cam 36 that actuates the connecting rod 37 is fixedly mounted on the outer surface of the rotating shaft 35. The difference between the maximum radius and the minimum radius of the cam 36 is consistent with the maximum distance the optical shaft 32 descends.

[0025] Both ends of the rotating shaft 35 are fixedly equipped with hexagonal nuts. By engaging the crank wrench with the hexagonal nuts, the rotating shaft 35 can be rotated quickly.

[0026] Working Principle: Before drilling into hard soil layers, workers need to find a relatively flat drilling location. The frame, consisting of mounting plate 1, column 7, and base 8, is placed on the hard soil. Holding the mounting plate 1 by the handle, the worker starts the drive motor 2, causing the drum 4 to rotate. Holding the handle, the worker moves the drum 4 towards the hard soil layer. Under the action of the cutting tool holder 6 and threaded rod 5, drilling begins. During drilling, debris from the hard soil layer is discharged upwards through the threaded rod 5. After drilling to a suitable depth, the worker stops the drive motor 2 and keeps the drum 4 inserted into the borehole. At this point, the worker uses a rocker arm to... The hexagonal nut is engaged, and the rotating shaft 35 and cam 36 are rotated rapidly by hand. During the rotation, the cam 36 can frequently lift and release the docking rod 37. When released, the reaction force generated by the third spring 33 will cause the optical shaft 32 and hammer block 34 to quickly reset, thereby knocking the limiting sleeve 30 downward. The vibration force generated by the knocking can cause the sliding rod 14 and sliding column 13 to extend the sampling arc plate 21 out of the bottom of the rotating cylinder 4 through the connecting rod 17, so that the sampling arc plate 21 can be embedded into the hard soil layer at the bottom of the borehole little by little. Through the action of the sampling frame 29, a sample can be collected from the hard soil layer at this depth. As the hammering block 34 slowly descends along with the slide bar 14 and the limiting sleeve 30, the distance that the cam 36 lifts relative to the optical axis 32 becomes larger and larger. This increases the hammering force of the hammering block 34 on the limiting sleeve 30, allowing the sampling arc plate 21 to be more effectively embedded into the hard soil layer.

[0027] Using the above sampling method, precise samples can be collected at a certain depth based on the depth of the borehole, without the need for manual insertion into the borehole for sampling, which is extremely convenient.

[0028] In this scheme, after the sampling arc plate 21 is effectively embedded in the hard soil layer, the staff can directly lift the drive motor 2 and its bottom structure by the handle. The sampling arc plate 21 will leave the drill hole along with the rotating drum 4, thereby extracting the hard soil sample in the sampling frame 29.

[0029] When it is necessary to retract the sampling arc plate 21 and the sampling frame 29 into the inside of the rotating drum 4, the operator only needs to pull the pull rod 26 so that the limiting ratchet 27 no longer restricts the ratchet groove 28. The slide rod 14 can be reset under the action of the tension spring 16, and the slide column 13 can also be reset along with the sampling arc plate 21.

[0030] Example 2: Please refer to Figure 6 and Figure 10 This embodiment is a further explanation of Embodiment 1. The axis of the sampling arc plate 21 and the sliding column 13 are set at an acute angle. The end of the connecting rod 17 away from the sampling arc plate 21 is slidably inserted into the interior of the sliding column 13, and a first spring 18 is fixedly provided between the end of the connecting rod 17 away from the sampling arc plate 21 and the sliding column 13.

[0031] In this embodiment: when the sampling arc plate 21 with an acute angle extends from the bottom of the rotating cylinder 4, the exposed ends of several sampling arc plates 21 can converge in a cone shape, which can achieve the effect of excavating the hard soil layer located at the center of the bottom of the rotating cylinder 4. When the sampling arc plate 21 is lifted out along with the rotating cylinder 4, a larger and more complete hard soil layer sample can be obtained.

[0032] Example 3: Please refer to Figure 3 This embodiment is a further explanation of Embodiment 1. A cleaning collar 10 is also slidably fitted on the outer surface of the rotating drum 4. The inner wall of the cleaning collar 10 is provided with a number of spiral grooves 11 that are equidistantly distributed in a circle, and the spiral grooves 11 are slidably assembled with a number of threaded strips 5. The cleaning collar 10 is located at the lower end of the limiting ring 9. A number of levers 12 that are equidistantly distributed in a circle are fixedly provided on the outer wall of the cleaning collar 10. Magnetic blocks are fixedly embedded on the lower end face of the limiting ring 9 and the upper end face of the cleaning collar 10. The magnetic poles of the two sets of magnetic blocks distributed vertically are opposite. The cleaning collar 10 is rotated by the levers 12, and the hard soil residue adhering to the surface of the rotating drum 4 and the threaded strips 5 can be removed during the rotation.

[0033] The lower outer edge of the cleaning ring 10 is concave arc-shaped, which allows the hard soil residue accumulated at the bottom of the cleaning ring 10 to fall off automatically.

[0034] In this embodiment: After drilling and sampling is completed, the staff can rotate the cleaning collar 10 by using the lever 12. During the rotation, due to the cooperation between the spiral groove 11 and multiple threaded bars 5, the cleaning collar 10 can rotate and descend. During the descent, the hard soil residue on the surface of the rotating drum 4 and the threaded bars 5 can be cleaned.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A soil pollution detection and sampling device, characterized in that, include: The mounting base (1) and the drive motor (2) fixedly mounted on the bottom of the mounting base (1) are provided with a drive shaft (3) fixedly mounted on the output end of the drive motor (2), and a rotating drum (4) fixedly mounted on the end of the drive shaft (3) away from the drive motor (2). Multiple spiral threaded strips (5) are fixedly mounted on the outer surface of the rotating drum (4). A cutting blade holder (6) is fixedly mounted on the end of the rotating drum (4) away from the drive motor (2). Four columns (7) are slidably inserted inside the mounting base (1) in a matrix distribution, and a base (8) is fixedly mounted on the bottom of the four columns (7). A center hole is opened in the center of the base (8). Also includes: A sampling unit is used to collect samples of hard soil layers inside the borehole. The sampling unit is located at one end of the rotary drum (4) near the cutting tool holder (6). A drive unit is used to drive the sampling unit to extend into the hard soil layer inside the borehole for sampling operations. The drive unit is located at the end of the rotary drum (4) away from the cutting tool holder (6).

2. The soil pollution detection and sampling device according to claim 1, characterized in that: The sampling unit includes a cylindrical cavity formed inside the rotating cylinder (4), the cylindrical cavity being coaxial with the rotating cylinder (4), a sliding column (13) being slidably fitted below the cylindrical cavity, and a plurality of connecting rods (17) evenly distributed in a circle inserted into the side wall of the sliding column (13), and a plurality of receiving cavities (19) for accommodating the connecting rods (17) being formed in the side wall of the cylindrical cavity, the receiving cavities (19) being distributed around the bottom periphery of the cylindrical cavity, each of the receiving cavities (19) being... Each of the internal parts has a limiting groove (20), and a sampling arc plate (21) is slidably inserted inside the limiting groove (20). The lower end of the sampling arc plate (21) slides through the rotating cylinder (4). The end of the connecting rod (17) away from the sliding column (13) is fixed perpendicularly to the limiting groove (20). Several sliders (22) are also fixedly installed on the outer wall of the sliding column (13), and several sliders (22) are slidably embedded in the interior of several receiving cavities (19).

3. The soil pollution detection and sampling device according to claim 2, characterized in that: The sampling arc plate (21) is fixedly provided with a number of sampling frames (29) that are equidistantly distributed in a straight line at one end near the sliding column (13). The bottom surface of the sampling frame (29) located at the bottommost position is coplanar with the bottom surface of the sampling arc plate (21).

4. A soil pollution detection and sampling device according to claim 2 or 3, characterized in that: The sampling arc plate (21) is set at an acute angle to the axis of the sliding column (13). The end of the connecting rod (17) away from the sampling arc plate (21) is slidably inserted into the interior of the sliding column (13), and a first spring (18) is fixedly provided between the end of the connecting rod (17) away from the sampling arc plate (21) and the sliding column (13).

5. A soil pollution detection and sampling device according to claim 2, characterized in that: The drive unit includes a slide rod (14) fixedly mounted on the top of the slide column (13), and a limiting sleeve (30) that slides and fits outside the rotating cylinder (4) is fixedly mounted on the other end of the slide rod (14). A retaining ring (15) is also fixedly mounted inside the cylindrical cavity, and the retaining ring (15) is located between the limiting sleeve (30) and the slide column (13). The slide rod (14) moves through the retaining ring (15), and a tension spring (16) is fixedly mounted between the slide column (13) and the retaining ring (15). A limiting component to prevent the slide column (13) from retracting is also provided between the slide rod (14) and the rotating cylinder (4), as well as a hammering component to cause the slide rod (14) to move downward.

6. A soil pollution detection and sampling device according to claim 5, characterized in that: The limiting component includes a limiting ring (9) fixedly fitted on the outer surface of the rotating cylinder (4), and the limiting ring (9) is located at the upper end of several threaded strips (5). A hollow ring body (23) is slidably fitted on the outside of the slide rod (14), and the upper and lower end faces of the hollow ring body (23) are consistent with the upper and lower end faces of the limiting ring (9). The hollow ring body (23) is fixed inside the cylindrical cavity. A sliding plate (24) is radially slidably fitted inside the hollow ring body (23), and a limiting ratchet (27) is fixedly provided at one end of the sliding plate (24) near the slide rod (14). The limiting ratchet (27) moves through the hollow ring (23). The slide bar (14) has several ratchet grooves (28) that are equidistantly distributed in a straight line at one end near the slide plate (24). The limiting ratchet (27) engages with the ratchet grooves (28). A pull rod (26) that slides through the hollow ring (23) and the limiting ring (9) is fixedly provided at the end of the slide plate (24) away from the slide bar (14). A second spring (25) is also fixedly provided between the end of the slide plate (24) away from the slide bar (14) and the hollow ring (23).

7. A soil pollution detection and sampling device according to claim 5, characterized in that: The hammering component includes a gantry frame (31) fixedly mounted outside the drive shaft (3). The gantry frame (31) is located above the rotating drum (4) and is inverted. Two symmetrically distributed optical axes (32) are slidably fitted at the upper end of the gantry frame (31), and a hammering block (34) is fixedly provided at the lower end of the optical axis (32) and is in movable contact with the upper surface of the limiting sleeve (30). The upper surface of the hammering block (34) is in contact with the upper surface of the limiting sleeve (30). A third spring (33) is fixedly installed between the gantry frames (31). The end of the optical axis (32) away from the hammer block (34) is a vertical bend, and a docking rod (37) is fixedly installed between the two vertical bends. A rotating shaft (35) is also rotatably mounted on the outer wall of the drive shaft (3). The rotating shaft (35) is perpendicular to the drive shaft (3). A cam (36) for moving the docking rod (37) is fixedly fitted on the outer surface of the rotating shaft (35).

8. A soil pollution detection and sampling device according to claim 7, characterized in that: Both ends of the rotating shaft (35) are fixedly provided with internal hexagonal nuts.

9. A soil pollution detection and sampling device according to claim 6, characterized in that: The outer surface of the rotating drum (4) is also slidably fitted with a cleaning collar (10). The inner wall of the cleaning collar (10) is provided with a number of spiral grooves (11) that are equidistantly distributed in a circle. The spiral grooves (11) are slidably assembled with a number of threaded strips (5). The cleaning collar (10) is located at the lower end of the limiting ring (9). The outer wall of the cleaning collar (10) is fixedly provided with a number of levers (12) that are equidistantly distributed in a circle. The lower end face of the limiting ring (9) and the upper end face of the cleaning collar (10) are both fixedly embedded with magnetic blocks. The magnetic poles of the two sets of magnetic blocks that are distributed vertically are opposite.

10. A soil pollution detection and sampling device according to claim 9, characterized in that: The lower outer edge of the cleaning collar (10) is concave arc-shaped.

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