A sampling method for detecting heavy metal contaminated soil

Abstract

The invention discloses a sampling method for detecting heavy metal polluted soil, which relates to the field of soil sampling and comprises the following steps: step one, pre-processing of sampling points, moving a workbench to a selected sampling point of heavy metal polluted soil through a moving wheel, starting two second electric telescopic cylinders of a scraping assembly, and pushing a side plate downward through a telescopic end; step two, drilling sampling, the trapezoidal vertical block drives a sampling drill barrel to move when moving until it is located above a perforation; step three, soil collection, after sampling is completed, a fixed motor stops, and at the same time a hydraulic cylinder brings out the sampling drill barrel, and then the trapezoidal vertical block and the moving plate are reset by driving the motor to rotate in the opposite direction, and at this time the sampling drill barrel is located above a feeding slot again. The application can clean up stone particles on the ground before drilling sampling, so that the contact surface between the drill barrel and the ground becomes more stable, the wear of the drill barrel by stones is reduced, the service life is extended, and the quality of sampling is ensured.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of soil sampling, and in particular to a sampling method for detecting heavy metal contaminated soil. Background Art

[0002] Heavy metal contaminated soil testing refers to the detection and quantification of the presence of heavy metal elements in the soil. Heavy metals (also called heavy metal ions) are relatively large metal atoms. Their chemical properties cause them to accumulate in the environment and pose a potential threat to the ecological environment and human health. Therefore, the most important thing in the detection of heavy metal contaminated soil is soil sampling, and the quality of soil sampling is also related to the accuracy of the entire test results.

[0003] A rapid sampling device and method for detecting heavy metal pollution in soil described in the prior art includes a vehicle body, a mounting plate fixedly connected to one side of the vehicle body, a sleeve shaft rotatably connected to the top of the mounting plate, a spline shaft slidably connected to the top of the sleeve shaft, and the soil can be taken out in one piece by the coordinated use of a spiral blade and a sleeve, and the sampling tube is inserted into the sleeve for sampling by turning the rotating frame.

[0004] Although the above technology can sample soil at different depths, and the rotating rod and sleeve can be controlled separately, when drilling holes for soil sampling, the drill bit may be subjected to greater lateral force when in contact with the ground due to the presence of stone particles on the surface of the soil contaminated by heavy metals, which increases the wear of the drill bit. Using a severely worn drill bit for sampling for a long time may affect the accuracy of the sampling results. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a sampling method for detecting heavy metal contaminated soil to solve the technical problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A sampling method for detecting heavy metal contaminated soil comprises the following steps:

[0008] Step 1: Pre-treatment of the sampling point: Move the workbench to the selected sampling point of the heavy metal contaminated soil through the moving wheels, start the two second electric telescopic cylinders of the scraping assembly, push the side plates downward through the telescopic ends, so that the two scrapers move downward and contact the ground surface, and then use the driving motor in the driving assembly to drive the two first screw rods and the two second screw rods to drive the trapezoidal vertical block and the moving plate to move relative to each other under the action of the transmission sprocket and the meshing driving wheel, so that the moving scraper scrapes away the stone particles on the ground surface of the sampling point;

[0009] Step 2: Drilling and sampling. When the trapezoidal vertical block moves, it drives the sampling drill tube to move until it is located above the perforation. Then, the sampling drill tube is controlled to rotate by a fixed motor. At the same time, the two hydraulic cylinders in the pressing assembly work to push the connecting block to drive the shell to move downward, so that the rotating sampling drill tube passes through the perforation and contacts the ground, and continues to move downward, sampling the heavy metal-contaminated soil while drilling;

[0010] Step 3: Soil collection. After sampling is completed, the fixed motor stops, and the hydraulic cylinder takes out the sampling drill barrel. Then the driving motor rotates in the opposite direction to reset the trapezoidal vertical block and the movable plate. At this time, the sampling drill barrel is re-located above the feeding slot. Then the first electric telescopic cylinder works to push the pushing plate into the sampling drill barrel to push out the collected soil. The soil falls into the collecting box through the feeding slot, which is convenient for subsequent pollution detection.

[0011] The technical solution is specific, the lower surface of the workbench is provided with a movable groove, the interior of the workbench is provided with movable cavities on both sides above the movable groove, the two movable cavities are connected with the movable groove through strip through grooves, the upper surface of the workbench is provided with a first through groove and a second through groove at the two movable cavities, the trapezoidal vertical block is slidably arranged at one end of the upper surface of the workbench, a side support plate is provided on one side of the vertical surface of the trapezoidal vertical block, a shell is installed between the side support plate and the trapezoidal vertical block through a downward pressing component, a driving wheel is provided on one side of the interior of the shell, a driven wheel is meshed with one side of the driving wheel, a sampling drill barrel is fixedly penetrated at the center of the driven wheel, the bottom end of the sampling drill barrel passes through the lower surface of the shell, and the top of the sampling drill barrel is located below the driven wheel and a sleeve shaft is installed;

[0012] A scraping assembly is provided in the movable groove, and a driving member of the scraping assembly is located in the movable cavity. A driving cavity is opened at one end of the workbench away from the trapezoidal vertical block. The driving assembly is arranged in the driving cavity. The actuators of the driving assembly are located in two movable cavities. The driving assembly is used to relatively move the trapezoidal vertical block and the scraping assembly.

[0013] The technical solution is specific, the scraping assembly includes a movable plate, the movable plate is located in a movable groove, a scraper is symmetrically welded on the lower surface of the movable plate, side plates are welded on both side walls of the movable plate, a second movable seat is provided above the two side plates, the two second movable seats are respectively arranged in corresponding movable cavities, a second electric telescopic cylinder is fixedly penetrated in the two second movable seats, the telescopic ends of the two second electric telescopic cylinders pass through the strip through groove and are fixedly connected to the upper surface of the side plate, and the top ends of the two second electric telescopic cylinders pass through the first through groove and are slidably connected to its groove wall, the bottom of the trapezoidal vertical block is symmetrically provided with through grooves, and the two through grooves match the second electric telescopic cylinder.

[0014] Specifically, the two second through grooves have the same length as the two first through grooves and are not flush with each other, and one end of the two second through grooves is located below the trapezoidal vertical block.

[0015] The technical solution is specific, the pressing assembly includes a pressing groove, the trapezoidal vertical block and the side support plate are provided with a pressing groove at the center line of the wall of the shell body, a sliding rod is symmetrically fixed in each of the pressing grooves, connecting blocks are welded to the bottom of the outer walls on both sides of the shell, each of the connecting blocks is inserted into the pressing groove and sleeved on the sliding rod, a hydraulic cylinder is installed at the center of the top end of the trapezoidal vertical block and the side support plate by bolts, the telescopic ends of the two hydraulic cylinders are inserted into the pressing groove and fixed with the upper surface bolts of the connecting block.

[0016] The technical solution is specific, the driving assembly includes a driving motor, the driving motor is installed in a driving cavity by bolts, both sides of the driving cavity are rotatably installed with a first shaft rod, the two first shaft rods are parallelly provided with a second shaft rod on the side away from the driving motor, one end of the two first shaft rods and the second shaft rods pass through the driving cavity and extend into the movable cavity, the ends of the first shaft rod and the second shaft rod in the movable cavity are respectively provided with a first screw rod and a second screw rod, the two first through grooves are located above the first screw rod, the two second through grooves are located above the second screw rod, the two first screw rods pass through a second movable seat arranged in the scraping assembly, the first movable seats are welded on both sides of the bottom of the trapezoidal vertical block, and the two first movable seats pass through the second through groove and are installed on the second screw rod.

[0017] Specifically, the ends of the two first screw rods and the second screw rods are fixedly connected to the first shaft rod and the second shaft rod respectively, a large sprocket is fixedly installed on the output end of the driving motor, small sprockets are fixedly installed on the outer walls of the ends of the two first shaft rods, the large sprocket and the two small sprockets are connected by a transmission chain, and meshing driving wheels are fixedly installed on the outer walls of the two first shaft rods and the second shaft rods.

[0018] Specifically, a fixed motor is installed on one side of the inner top wall of the shell by bolts, and the output end of the fixed motor passes through the driving wheel and is fixedly connected to it. The inner top wall of the shell is located directly above the sampling drill barrel and is installed with a first electric telescopic cylinder by bolts. A circular push plate is installed with bolts on the telescopic end of the first electric telescopic cylinder, and the diameter of the push plate is the same as the inner diameter of the sampling drill barrel.

[0019] Specifically, the workbench is provided with a pull-out groove on one side of the trapezoidal vertical block, the pull-out groove is located between two movable cavities, a material receiving box is slidably installed in the pull-out groove, and a material unloading groove communicating with the pull-out groove is provided on the upper surface of the workbench.

[0020] Specifically, the bottom of the trapezoidal vertical block is symmetrically provided with through grooves, and the two through grooves are matched with the two second electric telescopic cylinders arranged in the scraping assembly. A handle is fixed by bolts at the center of the inclined surface of the trapezoidal vertical block away from the shell, and a plurality of balls are embedded in the bottom end of the side support plate, and the plurality of balls are in rolling contact with the upper surface of the workbench.

[0021] In summary, the present invention mainly has the following beneficial effects: the present invention can clean up the stone particles on the ground before drilling and sampling, so that the contact surface between the drill tube and the ground becomes smoother, the wear of the drill tube by the stone is reduced, the service life is extended, and the quality of sampling is ensured;

[0022] First, the workbench is pushed into the selected sampling area through the moving wheel, and the second electric telescopic cylinder in the scraping assembly is started. The telescopic ends of the two second electric telescopic cylinders push the side plates downward, and the side plates move downward with the moving plates, so that the bottom ends of the two scraping plates are in contact with the ground. Then the driving motor in the driving assembly works, and drives the two first screw rods and the second screw rods to rotate through the transmission wheel and the meshing driving wheel, so that the two second movable seats in the scraping assembly move following the rotation of the first screw rod under the restriction of the second electric telescopic cylinder and the first through slot. During the movement, the second electric telescopic cylinder drives the moving plate to move through the side plate, so that the scraping plate pushes away the stone particles on the ground.

[0023] At the same time, the two first movable seats carry the trapezoidal vertical blocks to move following the rotation of the second screw rod, and the trapezoidal vertical blocks push the shell and the side support plate to move until the first movable seat moves to the end of the second through slot. At this time, the bottom end of the sampling drill barrel is located above the perforation. At this time, the driving motor stops working, and then the fixed motor works to rotate the sampling drill barrel through the active wheel and the driven wheel. In conjunction with the two hydraulic cylinders in the pressing assembly, the rotating sampling drill barrel can be driven down through the downwardly moved shell, so that the sampling drill barrel passes through the perforation and the movable slot and contacts the ground to perform drilling sampling operations. After the sampling is completed, it is reset so that the sampling drill barrel is located above the feeding through slot. The soil sample can be pushed out through the first electric telescopic cylinder and the pushing plate and falls into the collecting box for collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a diagram of the method steps of the present invention;

[0025] Figure 2 It is a schematic diagram of the sampling device of the present invention;

[0026] Figure 3 It is a side cross-sectional structural diagram of the present invention;

[0027] Figure 4 It is a top view of the structure of the present invention;

[0028] Figure 5A top sectional view of a workbench of the present invention;

[0029] Figure 6 It is a schematic diagram of the scraping assembly of the present invention;

[0030] Figure 7 It is an enlarged view of point A of the present invention.

[0031] Description of the drawings: 1. Workbench; 101. Moving wheel; 102. Moving slot; 103. Movable cavity; 1031. First through slot; 1032. Second through slot; 104. Driving cavity; 105. Perforation; 106. Drawing slot; 1061. Material receiving box; 1062. Material unloading slot; 107. Strip through slot; 2. Trapezoidal vertical block; 201. Through slot; 202. Handle; 203. First movable seat; 3. Shell; 301. Sampling drill tube; 302. Sleeve shaft; 303. First electric telescopic cylinder; 3031. Pushing plate; 304. Fixed motor; 3041. Driving wheel; 305, driven wheel; 4, side support plate; 401, ball bearing; 5, pressing assembly; 501, pressing groove; 502, sliding rod; 503, connecting block; 504, hydraulic cylinder; 6, scraping assembly; 601, moving plate; 6011, scraper; 6012, side plate; 602, second movable seat; 603, second electric telescopic cylinder; 7, driving assembly; 701, driving motor; 702, large sprocket; 703, first shaft rod; 7031, first screw rod; 704, second shaft rod; 7041, second screw rod; 705, small sprocket; 706, transmission chain; 707, driving wheel. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] The following describes an embodiment of the present invention based on its overall structure. Example

[0034] See also Figure 1-7 As shown, a sampling method for detecting heavy metal contaminated soil includes the following steps:

[0035] Step 1: Pretreatment of sampling points: Move the workbench 1 to the selected sampling point of the heavy metal contaminated soil through the moving wheel 101, start the two second electric telescopic cylinders 603 of the scraping assembly 6, push the side plate 6012 downward through the telescopic end, so that the two scrapers 6011 move downward and contact the ground surface, and then drive the two first screw rods 7031 and the two second screw rods 7041 through the driving motor 701 in the driving assembly 7, under the action of the transmission sprocket and the meshing driving wheel 707, drive the trapezoidal vertical block 2 and the moving plate 601 to move relative to each other, and the moving scraper 6011 scrapes away the stone particles on the ground surface of the sampling point;

[0036] Step 2: Drilling and sampling. When the trapezoidal vertical block 2 moves, it drives the sampling drill tube 301 to move until it is located above the perforation 105. Then, the sampling drill tube 301 is controlled to rotate by the fixed motor 304. At the same time, the two hydraulic cylinders 504 in the pressing assembly 5 work to push the connecting block 503 to drive the housing 3 to move downward, so that the rotating sampling drill tube 301 passes through the perforation 105 and contacts the ground, and continues to move downward, and samples the heavy metal-contaminated soil while drilling;

[0037] Step 3, soil collection. After sampling is completed, the fixed motor 304 stops, and the hydraulic cylinder 504 takes out the sampling drill barrel 301, and then the driving motor 701 rotates in the opposite direction to reset the trapezoidal vertical block 2 and the movable plate 601. At this time, the sampling drill barrel 301 is re-located above the feeding slot 1062, and then the first electric telescopic cylinder 303 works to push the pushing plate 3031 into the sampling drill barrel 301 to push out the collected soil. The soil falls into the collecting box 1061 through the feeding slot 1062, which is convenient for subsequent pollution detection.

[0038] All electrical components in this application are controlled by external controllers.

[0039] See also Figure 2-5As shown, a movable groove 102 is provided on the lower surface of the workbench 1, and movable cavities 103 are provided on both sides above the movable groove 102 inside the workbench 1, and the two movable cavities 103 are connected to the movable groove 102 through a strip-shaped through groove 107, and a first through groove 1031 and a second through groove 1032 are provided on the upper surface of the workbench 1 at the two movable cavities 103, and the two second through grooves 1032 are the same length as the two first through grooves 1031 and are not flushly arranged, and one end of the two second through grooves 1032 is located below the trapezoidal vertical block 2, and the trapezoidal vertical block 2 is slidably arranged at one end of the upper surface of the workbench 1, and a side support plate 4 is provided on one side of the vertical surface of the trapezoidal vertical block 2, and a shell 3 is installed between the side support plate 4 and the trapezoidal vertical block 2 through a pressing assembly 5, and the interior of the shell 3 A driving wheel 3041 is provided on one side, and a driven wheel 305 is meshed on one side of the driving wheel 3041. A sampling drill tube 301 is fixedly penetrated at the center of the driven wheel 305. The bottom end of the sampling drill tube 301 passes through the lower surface of the shell 3. The top of the sampling drill tube 301 is located below the driven wheel 305 and is equipped with a sleeve shaft 302. A fixed motor 304 is installed on one side of the inner top wall of the shell 3 through bolts. The output end of the fixed motor 304 passes through the driving wheel 3041 and is fixedly connected thereto. The inner top wall of the shell 3 is located directly above the sampling drill tube 301 and is equipped with a first electric telescopic cylinder 303 through bolts. The telescopic end of the first electric telescopic cylinder 303 is bolted with a circular push plate 3031. The diameter of the push plate 3031 is the same as the inner diameter of the sampling drill tube 301.

[0040] The bottom of the trapezoidal vertical block 2 is symmetrically provided with through grooves 201, and the two through grooves 201 are matched with the two second electric telescopic cylinders 603 provided in the scraping assembly 6. The handle 202 is fixed by bolts at the center of the inclined surface of the trapezoidal vertical block 2 away from the shell 3. A plurality of balls 401 are embedded in the bottom end of the side support plate 4, and the plurality of balls 401 are in rolling contact with the upper surface of the workbench 1. The pressing assembly 5 includes a pressing groove 501, and the wall of the trapezoidal vertical block 2 and the side support plate 4 close to the shell 3 is fixed. A downward pressing groove 501 is provided at each of the lines, and a sliding rod 502 is symmetrically fixed in each downward pressing groove 501. A connecting block 503 is welded to the bottom of the outer wall of both sides of the shell 3, and each connecting block 503 is inserted into the downward pressing groove 501 and sleeved on the sliding rod 502. A hydraulic cylinder 504 is installed at the center of the top of the trapezoidal vertical block 2 and the side support plate 4 by bolts, and the telescopic ends of the two hydraulic cylinders 504 are inserted into the downward pressing groove 501 and fixed with the upper surface of the connecting block 503 by bolts;

[0041] A scraping component 6 is provided in the movable groove 102, and a driving member of the scraping component 6 is located in the active cavity 103. A driving cavity 104 is provided at one end of the interior of the workbench 1 away from the trapezoidal vertical block 2. The driving component 7 is arranged in the driving cavity 104. The actuators of the driving component 7 are both located in the two active cavities 103. The driving component 7 is used for relative movement of the trapezoidal vertical block 2 and the scraping component 6. A pull-out groove 106 is provided on one side of the workbench 1 located on the trapezoidal vertical block 2. The pull-out groove 106 is located between the two active cavities 103. A material receiving box 1061 is slidably installed in the pull-out groove 106, and a material unloading groove 1062 communicated with the pull-out groove 106 is provided on the upper surface of the workbench 1.

[0042] When conducting soil detection for heavy metal pollution, it is necessary to drill holes on the ground for sampling. First, the staff determines the selected area and sampling point, and then pushes the workbench 1 through the handle 202. The workbench 1 moves to the selected area under the rolling of the moving wheel 101, so that the perforation 105 is located at the sampling point. At this time, the staff starts the lifting part of the scraping component 6 through the external controller, controls the actuator of the scraping component 6 to move down and contact the ground, and then starts the driving part of the driving component 7 through the controller, so that the trapezoidal vertical block 2 drives the shell 3 and the side support plate 4 to move with the scraping component 6. The side support plate 4 can reduce the friction with the workbench 1 through the ball 401, and the shell 3 will drive the sampling drill tube 301 to move from above the feeding slot 1062 to above the perforation 105. At this time, the scraping component 6 will move along the moving slot 102 and the first slot 1031, and its actuator will push away the stone particles on the ground;

[0043] Then, the fixed motor 304 is started through the controller, and the output end of the fixed motor 304 drives the driving wheel 3041 to rotate, and the driving wheel 3041 drives the meshing driven wheel 305 to rotate, and the driven wheel 305 drives the penetrated sampling drill tube 301 to rotate, and at the same time, the two hydraulic cylinders 504 in the pressing assembly 5 work, and the telescopic ends of the two hydraulic cylinders 504 push the connecting block 503 to move along the pressing groove 501 and the sliding rod 502, and the two moving connecting blocks 503 drive the shell 3 to move downward, and the shell 3 drives the rotating sampling drill tube 301 to move downward, so that the bottom end of the sampling drill tube 301 passes through the perforation 105 and the moving groove 102 to contact the sampling point, and the drilling sampling operation is performed;

[0044] After a period of time, the fixed motor 304 stops working, and the telescopic ends of the two hydraulic cylinders 504 move up, so that the housing 3 and the sampling drill tube 301 are reset, and then the driving member of the driving assembly 7 works in the reverse direction, and the trapezoidal vertical block 2 and the scraping assembly 6 are reset. At this time, the bottom end of the sampling drill tube 301 is located above the feeding slot 1062. At this time, the staff starts the first electric telescopic cylinder 303 through the controller, and the telescopic end of the first electric telescopic cylinder 303 pushes the push plate 3031 downward, and the push plate 3031 enters the interior of the sampling drill tube 301, pushes out the collected soil, and the pushed soil falls into the material receiving box 1061 through the feeding slot 1062. Finally, the staff draws the material receiving box 1061 out of the drawing slot 106, and uses the detection equipment to detect heavy metal pollution in the soil, wherein the detection equipment adopts the existing technology, which will not be described in detail in this article;

[0045] Therefore, the present application can clean up the stone particles on the ground before drilling and sampling, so that the contact surface between the drill tube and the ground becomes smoother, the wear of the drill tube by the stones is reduced, the service life is extended, and the quality of sampling is ensured.

[0046] See also Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, the scraping assembly 6 includes a movable plate 601, which is located in the movable groove 102, and a scraper 6011 is symmetrically welded on the lower surface of the movable plate 601, and side plates 6012 are welded on both side walls of the movable plate 601. A second movable seat 602 is provided above the two side plates 6012, and the two second movable seats 602 are respectively arranged in the corresponding movable chambers 103, and a second electric telescopic cylinder 603 is fixedly penetrated in the two second movable seats 602. The telescopic ends of the two second electric telescopic cylinders 603 penetrate the strip through groove 107 and are fixedly connected to the upper surface of the side plate 6012, and the top ends of the two second electric telescopic cylinders 603 penetrate the first through groove 1031 and are slidably connected to its groove wall, and the bottom of the trapezoidal vertical block 2 is symmetrically provided with through grooves 201, and the two through grooves 201 are matched with the second electric telescopic cylinder 603;

[0047] The two second electric telescopic cylinders 603 in the scraping assembly 6 work, and the telescopic ends of the two second electric telescopic cylinders 603 push the side plates 6012 to move downward, and the two side plates 6012 drive the moving plate 601 to move downward, and the moving plate 601 drives the two scraping plates 6011 to move downward, so that the bottom ends of the two scraping plates 6011 are in contact with the ground;

[0048] The driving assembly 7 includes a driving motor 701, which is installed in the driving cavity 104 by bolts. First shafts 703 are rotatably installed on both sides of the driving cavity 104. Second shafts 704 are parallelly provided on the side of the two first shafts 703 away from the driving motor 701. One end of the two first shafts 703 and the second shaft 704 penetrates the driving cavity 104 and extends into the movable cavity 103. The ends of the first shaft 703 and the second shaft 704 in the movable cavity 103 are respectively provided with a first screw rod 7031 and a second screw rod 7041. The two first through grooves 1031 are both located above the first screw rod 7031, and the two second through grooves 1032 are both located above the second screw rod 7041. The two first screw rods 7031 Both penetrate the second movable seat 602 set in the scraping component 6, and the first movable seats 203 are welded on both sides of the bottom of the trapezoidal vertical block 2. The two first movable seats 203 both penetrate the second through groove 1032 and are installed on the second screw rod 7041. The ends of the two first screw rods 7031 and the second screw rods 7041 are respectively fixedly connected to the first shaft rod 703 and the second shaft rod 704. A large sprocket 702 is fixedly installed on the output end of the driving motor 701, and small sprockets 705 are fixedly installed on the outer walls of the ends of the two first shaft rods 703. The large sprocket 702 and the two small sprockets 705 are connected by a transmission chain 706, and the outer walls of the two first shaft rods 703 and the second shaft rod 704 are fixedly installed with meshing driving wheels 707.

[0049] The driving motor 701 in the driving assembly 7 works, and its output end rotates with the large sprocket 702, and the large sprocket 702 drives the small sprocket 705 to rotate through the transmission chain 706. The rotation of the two small sprockets 705 drives the first shaft rod 703 to rotate, and the rotation of the first shaft rod 703 also drives the installed driving wheel 707 to rotate, and the driving wheel 707 drives another meshing driving wheel 707 to rotate, so that the second shaft rod 704 rotates with the first shaft rod 703, and the first shaft rod 703 and the second shaft rod 704 rotate. When the rod 704 rotates, it drives the connected first screw rod 7031 and the second screw rod 7041 to rotate. When the first screw rod 7031 rotates, the second movable seat 602 installed on the outer wall moves under the restriction of the second electric telescopic cylinder 603 and the first through groove 1031. During the movement, the second electric telescopic cylinder 603 is driven to move, so that the telescopic end of the second electric telescopic cylinder 603 drives the side plate 6012, the movable plate 601 and the scraper 6011 to move, and the moving scraper 6011 pushes away the stone particles on the ground.

[0050] At the same time, when the second screw rod 7041 rotates, it will drive the installed first movable seat 203 to move along the second through groove 1032, and the moving first movable seat 203 will drive the trapezoidal vertical block 2 to move, and the trapezoidal vertical block 2 will push the side support plate 4 to move through the shell 3. When the moving trapezoidal vertical block 2 and the moving second electric telescopic cylinder 603 are intertwined, the two second electric telescopic cylinders 603 will pass through the through groove 201, thereby cleaning the stone particles on the ground and moving the sampling drill tube 301 to the drilling area.

[0051] The working principle of the present invention is:

[0052] When conducting soil detection for heavy metal pollution, it is necessary to drill holes on the ground for sampling. First, the staff determines the selected area and the sampling point, and then pushes the workbench 1 through the handle 202. The workbench 1 moves to the selected area under the rolling of the moving wheel 101, so that the perforation 105 is located at the sampling point. At this time, the staff starts the two second electric telescopic cylinders 603 in the scraping assembly 6 through the external controller. The telescopic ends of the two second electric telescopic cylinders 603 push the side plates 6012 downward, and the two side plates 6012 drive the moving plate 601 downward. The moving plate 601 drives the two scrapers 6011 downward, so that the bottom ends of the two scrapers 6011 are in contact with the ground.

[0053] Then the controller starts the driving motor 701 in the driving assembly 7 to work, and its output end rotates with the large sprocket 702, and the large sprocket 702 drives the small sprocket 705 to rotate through the transmission chain 706. The rotation of the two small sprockets 705 drives the first shaft rod 703 to rotate, and the rotation of the first shaft rod 703 also drives the installed driving wheel 707 to rotate, and the driving wheel 707 drives the other meshing driving wheel 707 to rotate, so that the second shaft rod 704 rotates with the first shaft rod 703, and the first shaft rod 703 rotates. When the second shaft 704 rotates, the connected first screw rod 7031 and the second screw rod 7041 will be driven to rotate. When the first screw rod 7031 rotates, the second movable seat 602 installed on the outer wall will move under the restriction of the second electric telescopic cylinder 603 and the first through groove 1031, and the second electric telescopic cylinder 603 will be driven to move during the movement, so that the telescopic end of the second electric telescopic cylinder 603 drives the side plate 6012, the movable plate 601 and the scraper 6011 to move, and the moving scraper 6011 pushes away the stone particles on the ground;

[0054] At the same time, when the second screw rod 7041 rotates, it will drive the installed first movable seat 203 to move along the second through slot 1032, and the moving first movable seat 203 will drive the trapezoidal vertical block 2 to move, and the trapezoidal vertical block 2 will push the side support plate 4 to move through the shell 3. When the moving trapezoidal vertical block 2 and the moving second electric telescopic cylinder 603 are interlaced, the two second electric telescopic cylinders 603 will pass through the through slot 201, so that the trapezoidal vertical block 2 drives the shell 3 and the side support plate 4 and the scraping assembly 6 to move, and the shell 3 will drive the sampling drill tube 301 to move from above the feeding through slot 1062 to above the perforation 105.

[0055] Then, the fixed motor 304 is started through the controller, and the output end of the fixed motor 304 drives the driving wheel 3041 to rotate, and the driving wheel 3041 drives the meshing driven wheel 305 to rotate, and the driven wheel 305 drives the penetrated sampling drill tube 301 to rotate, and at the same time, the two hydraulic cylinders 504 in the pressing assembly 5 work, and the telescopic ends of the two hydraulic cylinders 504 push the connecting block 503 to move along the pressing groove 501 and the sliding rod 502, and the two moving connecting blocks 503 drive the shell 3 to move downward, and the shell 3 drives the rotating sampling drill tube 301 to move downward, so that the bottom end of the sampling drill tube 301 passes through the perforation 105 and the moving groove 102 to contact the sampling point, and the drilling sampling operation is performed;

[0056] After a period of time, the fixed motor 304 stops working, and the telescopic ends of the two hydraulic cylinders 504 move upward, so that the shell 3 and the sampling drill barrel 301 are reset, and then the driving part of the driving assembly 7 works in reverse, and the trapezoidal vertical block 2 and the scraping assembly 6 are reset. At this time, the bottom end of the sampling drill barrel 301 is located above the feeding groove 1062. At this time, the staff starts the first electric telescopic cylinder 303 through the controller, and the telescopic end of the first electric telescopic cylinder 303 pushes the pushing plate 3031 downward, and the pushing plate 3031 enters the interior of the sampling drill barrel 301, pushes out the collected soil, and the pushed soil falls into the receiving box 1061 through the feeding groove 1062. Finally, the staff pulls the receiving box 1061 out of the pull-out groove 106 and uses the detection equipment to detect heavy metal pollution in the soil.

[0057] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A sampling method for detecting heavy metal contaminated soil, characterized in that , including the following steps: Step 1: Pre-treatment of the sampling point. The workbench (1) is moved to the selected sampling point of the heavy metal contaminated soil via the moving wheel (101). The two second electric telescopic cylinders (603) of the scraping assembly (6) are started, and the side plates (6012) are pushed downward via the telescopic ends, so that the two scrapers (6011) move downward and contact the ground surface. Then, the driving motor (701) in the driving assembly (7) drives the two first screw rods (7031) and the two second screw rods (7041) to move relative to each other under the action of the transmission sprocket and the meshing driving wheel (707). The moving scrapers (6011) scrape away the stone particles on the ground surface at the sampling point. Step 2: Drilling and sampling. When the trapezoidal vertical block (2) moves, it drives the sampling drill tube (301) to move until it is located above the perforation (105). Then, the fixed motor (304) controls the sampling drill tube (301) to rotate. At the same time, the two hydraulic cylinders (504) in the pressing assembly (5) work to push the connecting block (503) to drive the housing (3) to move downward, so that the rotating sampling drill tube (301) passes through the perforation (105) and contacts the ground, and continues to move downward, and samples the heavy metal-contaminated soil while drilling. Step 3: soil collection. After the sampling is completed, the fixed motor (304) stops, and the hydraulic cylinder (504) takes out the sampling drill tube (301). Then, the driving motor (701) rotates in the opposite direction to reset the trapezoidal vertical block (2) and the movable plate (601). At this time, the sampling drill tube (301) is located above the material discharge slot (1062) again. Then, the first electric telescopic cylinder (303) works to push the push plate (3031) into the sampling drill tube (301) to push out the collected soil. The soil falls into the material receiving box (1061) through the material discharge slot (1062) to facilitate subsequent pollution detection. The lower surface of the workbench (1) is provided with a movable groove (102), and movable cavities (103) are provided on both sides of the interior of the workbench (1) above the movable groove (102), and the two movable cavities (103) are connected to the movable groove (102) through a strip-shaped through groove (107). The upper surface of the workbench (1) is provided with a first through groove (1031) and a second through groove (1032) at the two movable cavities (103), and the trapezoidal vertical block (2) is slidably arranged at one end of the upper surface of the workbench (1), and the vertical surface of the trapezoidal vertical block (2) is A side support plate (4) is provided on one side, a housing (3) is installed between the side support plate (4) and the trapezoidal vertical block (2) via a pressing assembly (5), a driving wheel (3041) is provided on one side of the interior of the housing (3), a driven wheel (305) is meshed on one side of the driving wheel (3041), a sampling drill tube (301) is fixedly inserted through the center of the driven wheel (305), the bottom end of the sampling drill tube (301) passes through the lower surface of the housing (3), and a sleeve shaft (302) is installed on the top of the sampling drill tube (301) below the driven wheel (305); A fixed motor (304) is bolted to one side of the inner top wall of the shell (3); the output end of the fixed motor (304) passes through the driving wheel (3041) and is fixedly connected thereto; a first electric telescopic cylinder (303) is bolted to the inner top wall of the shell (3) directly above the sampling drill tube (301); a circular push plate (3031) is bolted to the telescopic end of the first electric telescopic cylinder (303); the diameter of the push plate (3031) is the same as the inner diameter of the sampling drill tube (301); a drawing groove (106) is provided on one side of the trapezoidal vertical block (2) of the workbench (1); the drawing groove (106) is located between the two movable cavities (103); a material receiving box (1061) is slidably installed in the drawing groove (106); and a material discharge through groove (1062) communicating with the drawing groove (106) is provided on the upper surface of the workbench (1); A scraping assembly (6) is provided in the movable groove (102), a driving member of the scraping assembly (6) is located in the movable cavity (103), a driving cavity (104) is provided in the interior of the workbench (1) at one end away from the trapezoidal vertical block (2), the driving assembly (7) is arranged in the driving cavity (104), the actuators of the driving assembly (7) are both located in the two movable cavities (103), and the driving assembly (7) is used to relatively move the trapezoidal vertical block (2) and the scraping assembly (6); The scraping assembly (6) comprises a movable plate (601), the movable plate (601) being located in the movable groove (102), a scraper plate (6011) being symmetrically welded to the lower surface of the movable plate (601), side plates (6012) being welded to both side walls of the movable plate (601), a second movable seat (602) being provided above the two side plates (6012), the two second movable seats (602) being respectively arranged in the corresponding movable cavities (103), and the two second movable seats (602) being respectively arranged in the corresponding movable cavities (103). 02) are fixedly penetrated with a second electric telescopic cylinder (603), the telescopic ends of the two second electric telescopic cylinders (603) penetrate the bar-shaped through groove (107) and are fixedly connected to the upper surface of the side plate (6012), and the top ends of the two second electric telescopic cylinders (603) penetrate the first through groove (1031) and are slidably connected to the groove wall thereof, and the bottom of the trapezoidal vertical block (2) is symmetrically provided with through grooves (201), and the two through grooves (201) are matched with the second electric telescopic cylinders (603); The pressing assembly (5) comprises a pressing groove (501), the trapezoidal vertical block (2) and the side support plate (4) are provided with a pressing groove (501) at the center line of the wall of the shell (3), a sliding rod (502) is symmetrically fixed in each of the pressing grooves (501), and connecting blocks (503) are welded to the bottom of the outer walls on both sides of the shell (3), and each of the connecting blocks (503) is inserted into the pressing groove (501) and sleeved on the sliding rod (502), and a hydraulic cylinder (504) is installed at the center of the top end of the trapezoidal vertical block (2) and the side support plate (4) by bolts, and the telescopic ends of the two hydraulic cylinders (504) are inserted into the pressing groove (501) and are fixed to the upper surface of the connecting block (503) by bolts; The driving assembly (7) comprises a driving motor (701), wherein the driving motor (701) is installed in a driving cavity (104) by means of bolts, and first shafts (703) are rotatably installed on both sides of the driving cavity (104), and second shafts (704) are provided in parallel on the sides of the two first shafts (703) away from the driving motor (701), and one end of the two first shafts (703) and the second shafts (704) penetrates the driving cavity (104) and extends into the movable cavity (103), and a first screw rod (7031) and a second screw rod (7041) are provided at the ends of the first shaft rod (703) and the second shaft rod (704) in the movable cavity (103), respectively, and the two first through slots (1031) are located above the first screw rod (7031), and the two second through slots (1032) are located above the second screw rod (7041), and the two first screw rods (7031) and the second through slots (1032) are located above the second screw rod (7041), respectively. 031) both penetrate the second movable seat (602) provided in the scraping assembly (6), the first movable seats (203) are welded to both sides of the bottom of the trapezoidal vertical block (2), the two first movable seats (203) both penetrate the second through slot (1032) and are installed on the second screw rod (7041), the ends of the two first screw rods (7031) and the second screw rods (7041) are respectively fixedly connected to the first shaft rod (703) and the second shaft rod (704), a large sprocket (702) is fixedly installed on the output end of the drive motor (701), the outer walls of the ends of the two first shaft rods (703) are both fixedly installed with small sprockets (705), the large sprocket (702) and the two small sprockets (705) are connected in transmission via a transmission chain (706), and the outer walls of the two first shaft rods (703) and the second shaft rod (704) are both fixedly installed with meshing driving wheels (707).

2. A sampling method for detecting heavy metal contaminated soil according to claim 1, characterized in that: The two second through slots (1032) have the same length as the two first through slots (1031) and are not arranged flush with each other, and one end of the two second through slots (1032) is located below the trapezoidal vertical block (2).

3. A sampling method for detecting heavy metal contaminated soil according to claim 1, characterized in that: The bottom of the trapezoidal vertical block (2) is symmetrically provided with through grooves (201), and the two through grooves (201) are matched with two second electric telescopic cylinders (603) provided in the scraping assembly (6). A handle (202) is fixed by bolts at the center of the inclined surface of the trapezoidal vertical block (2) away from the housing (3). A plurality of balls (401) are embedded in the bottom end of the side support plate (4), and the plurality of balls (401) are in rolling contact with the upper surface of the workbench (1).

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