Sampling device for soil pollution prevention and control

Abstract

The sampling device comprises a moving platform, a supporting frame, a mounting platform, a lifting mechanism and a drilling assembly, the supporting frame is fixedly arranged on the moving platform, the mounting platform is connected with the supporting frame in an up-down sliding mode, and the lifting mechanism is connected with the mounting platform; the drilling assembly comprises a drill rod, an opening and closing mechanism, two soil loosening rods and a drill bit, the drill rod is rotationally arranged on the mounting platform and driven by a driving motor, the opening and closing mechanism is arranged at the bottom of the drill rod, the two soil loosening rods are connected with the opening and closing mechanism, and the drill bit is composed of a first half drill bit and a second half drill bit which are matched with each other; sampling cavities are respectively formed in the first half drill bit and the second half drill bit. Therefore, the situation that a soil sample falls off from the device due to vibration, shaking and the like in the lifting process can be effectively avoided, hard soil can be effectively handled, samples in deep soil can be accurately collected, and reliable data support is provided for soil pollution assessment.

Description

Technical Field

[0001] The present application relates to the technical field of soil sampling, and in particular to a sampling device for soil pollution prevention and control. Background Art

[0002] Soil pollution prevention and control is a comprehensive work dedicated to protecting the soil environment and reducing the hazards of soil pollution. Soil pollution mainly comes from human activities such as industrial waste discharge, excessive use of agricultural chemicals, landfill, sewage irrigation, and natural geological processes. In soil pollution prevention and control work, soil sampling is a crucial preliminary link. By sampling and analyzing soil in different areas and at different depths, we can accurately understand the types, concentrations and distribution of pollutants in the soil, and provide data support for assessing the extent and scope of soil pollution. This is the basis for formulating targeted pollution prevention and control measures.

[0003] The soil sampling device in the related technology is generally composed of a power system, a drilling mechanism and a sample collection device. The power system provides power for the entire device, and is commonly driven by electric or fuel. The drilling mechanism mostly uses a rotary drill bit, which is driven by a motor to rotate at high speed, and uses the cutting edge of the drill bit to crush the soil and drill into the ground. During the drilling process, some equipment will be equipped with a spiral drill rod to spiral the cut soil up along the drill rod and bring it out of the ground; some use the vacuum adsorption principle to suck the crushed soil into the sample collection device.

[0004] However, when faced with complex soil conditions such as hard and compacted soil, although the power system of the automated equipment can output large power, significant defects are still exposed during actual operation. Take the sampling device equipped with a spiral drill rod to bring out the soil as an example. In the process of lifting the cut soil sample along the spiral drill rod to the ground, due to the vibration of the drilling operation itself and the shaking generated by the operation of the equipment, the adhesion between the soil sample and the drill rod is difficult to maintain, and it is very easy to fall off the drill rod. This not only leads to insufficient sample volume, but also makes it possible to repeat the sampling operation multiple times after each drilling, which greatly consumes time and seriously reduces work efficiency.

[0005] Equipment that uses the vacuum adsorption principle also faces difficulties when dealing with hard soil. Due to the hard texture of the soil, existing drill bits cannot fully break it into fine particles that can be effectively adsorbed by the vacuum during the high-speed rotation and cutting process. This makes it impossible for the equipment to accurately collect representative samples from deep soil when collecting soil samples. As a result, the subsequent analysis based on these samples cannot truly and accurately reflect the actual pollution status of the deep soil, which poses a hidden danger to soil pollution assessment and control work and may lead to the formulation of prevention and control measures that lack specificity and effectiveness. Summary of the Invention

[0006] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, one purpose of the present application is to provide a sampling device for soil pollution prevention and control, which can effectively prevent soil samples from falling off the device due to vibration, shaking, etc. during the lifting process, and can also effectively deal with hard soil, and can accurately collect samples in deep soil, providing reliable data support for soil pollution assessment.

[0008] To achieve the above-mentioned objectives, the first embodiment of the present application proposes a sampling device for soil pollution prevention and control, comprising a mobile platform, a support frame, an installation platform, a lifting mechanism and a drilling assembly, wherein the support frame is fixedly arranged on the mobile platform; the installation platform is connected to the support frame for sliding up and down, the lifting mechanism is arranged on the mobile platform, and the lifting mechanism is connected to the installation platform; the drilling assembly includes a drill rod, an opening and closing mechanism, two loosening rods and a drill bit, wherein the drill rod is rotatably arranged on the installation platform, and the drill rod is driven by a drive motor; the opening and closing mechanism is arranged at the bottom of the drill rod, and the two loosening rods are respectively connected to the opening and closing mechanism; the drill bit is composed of two mutually cooperating first and second half drill bits, and the first half drill bit and the second half drill bit are spliced ​​axially in a natural state to form a complete drill bit structure; a sampling cavity is respectively opened on one side where the first half drill bit and the second half drill bit are spliced ​​with each other, and the first half drill bit and the second half drill bit are respectively connected to the opening and closing mechanism.

[0009] The sampling device for soil pollution prevention and control in the embodiment of the present application can effectively prevent soil samples from falling off the device due to vibration, shaking, etc. during the lifting process, and can also effectively deal with hard soil. It can accurately collect samples in deep soil, provide reliable data support for soil pollution assessment, and thus help to formulate more targeted and effective pollution prevention and control measures.

[0010] In addition, the sampling device for soil pollution prevention and control proposed in this application may also have the following additional technical features:

[0011] In one embodiment of the present application, the opening and closing mechanism includes a fixed cover, a telescopic cylinder, two connecting rods and two sliding rods, wherein the fixed cover is fixedly connected to the bottom end of the drill rod, and the shape of the fixed cover is adapted to the shape of the drill rod; the cylinder body of the telescopic cylinder is fixedly arranged in the fixed cover, and the piston rod of the telescopic cylinder extends along the central axis direction of the drill rod; the sliding rod is composed of a vertical rod and an oblique rod, and the two sliding rods are Y-shaped after being spliced ​​together; guide rails with the same angle as the two oblique rods are respectively provided on both sides of the fixed cover, and the two oblique rods are respectively slidably matched with the two guide rails, and the ends of the two oblique rods away from the vertical rods respectively pass through the fixed cover; one end of the two connecting rods is pivotally connected to the end of the piston rod by a rotating pair, and the other end of the two connecting rods is pivotally connected to the two vertical rods by a rotating pair; a connecting groove is respectively provided on the side where the first half drill bit and the second half drill bit are close to each other, and the two vertical rods are fixedly connected to the first half drill bit and the second half drill bit respectively through the connecting groove.

[0012] In one embodiment of the present application, one end of the two loosening rods is fixedly connected to one end of the two oblique rods that are away from each other, and the other ends of the two loosening rods are respectively provided with a sharp portion.

[0013] In one embodiment of the present application, first inclined surfaces with the same angle as the two inclined rods are respectively provided on both sides of the bottom of the fixed cover, and second inclined surfaces adapted to the two first inclined surfaces are respectively provided on the tops of the first half drill bit and the second half drill bit.

[0014] In one embodiment of the present application, the first drill bit half and the second drill bit half are conical in the spliced ​​state; the outer surface of the drill bit is provided with a spiral blade, and the spiral blade extends from the top to the bottom of the drill bit.

[0015] In one embodiment of the present application, the lifting mechanism includes a lifting motor, a screw and a slide rail, wherein the slide rail is vertically installed on one side of the support frame, and a slider is slidably fitted on the slide rail; the mounting platform is fixedly connected to the slider; the screw is rotatably set on the mobile platform, one end of the screw passes through the mounting platform and is threadedly connected to the mounting platform; the lifting motor is fixedly set on the mobile platform, and the output shaft of the lifting motor is coaxially connected to one end of the screw through a coupling.

[0016] In one embodiment of the present application, the drive motor is fixedly mounted on the mounting platform, and the output shaft of the drive motor is coaxially connected to one end of the drill rod via a coupling.

[0017] In one embodiment of the present application, a through groove for the drill rod and the drill bit to pass through is formed on the mobile platform.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. After the soil sample is collected, it can be tightly and stably fixed by the first and second half drill bits, effectively preventing the soil sample from falling due to vibration, shaking, etc. during the lifting process. This not only ensures that the sample volume of a single sampling is sufficient, but also eliminates the need for repeated sampling, greatly saving time and significantly improving work efficiency.

[0020] 2. It can effectively deal with hard soil. When faced with hard and compacted soil, compared with existing technologies, it can more efficiently break the soil into fine particles, so that samples from deep soil can be accurately collected. This enables the analysis based on these samples to truly and accurately reflect the actual pollution status of deep soil, providing reliable data support for soil pollution assessment, and thus helping to formulate more targeted and effective pollution prevention and control measures.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 Schematic diagram of the overall structure of a sampling device for soil pollution prevention and control according to one embodiment of the present application;

[0024] Figure 2 1 is a schematic front cross-sectional structural diagram of a drilling assembly of a sampling device for soil pollution prevention and control according to one embodiment of the present application;

[0025] Figure 3 For this application Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 This is a schematic front view of the structure of a drill bit of a sampling device for soil pollution prevention and control in another state according to the present application.

[0027] As shown in the figure: 1. Mobile platform; 2. Support frame; 3. Installation platform; 4. Lifting mechanism; 401. Lifting motor; 402. Screw; 403. Slide rail; 5. Drilling assembly; 51. Drill rod; 52. Opening and closing mechanism; 521. Fixed cover; 522. Telescopic cylinder; 523. Connecting rod; 524. Slide rod; 5241. Vertical rod; 5242. Inclined rod; 53. Loosening rod; 54. Drill bit; 541. First half of drill bit; 542. Second half of drill bit; 55. Drive motor; 6. Spiral blade. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0029] The following describes a sampling device for soil pollution prevention and control according to an embodiment of the present application with reference to the accompanying drawings.

[0030] like Figure 1-Figure 4 As shown, the sampling device for soil pollution prevention and control according to an embodiment of the present application may include a mobile platform 1, a support frame 2, a mounting platform 3, a lifting mechanism 4 and a drilling assembly 5.

[0031] The support frame 2 is fixedly arranged on the mobile platform 1 , the mounting platform 3 is connected to the support frame 2 for vertical sliding, the lifting mechanism 4 is arranged on the mobile platform 1 , and the lifting mechanism 4 is connected to the mounting platform 3 .

[0032] The drilling assembly 5 may include a drill rod 51 , an opening and closing mechanism 52 , two loosening rods 53 and a drill bit 54 .

[0033] Among them, the drill rod 51 is rotatably set on the mounting platform 3, and the drill rod 51 is driven by a drive motor 55, the opening and closing mechanism 52 is set at the bottom of the drill rod 51, and the two loosening rods 53 are respectively connected to the opening and closing mechanism 52, and the drill bit 54 is composed of two first half drill bits 541 and second half drill bits 542 that cooperate with each other. The first half drill bit 541 and the second half drill bit 542 are spliced ​​axially in a natural state to form a complete drill bit 54 structure. A sampling cavity is respectively opened on one side where the first half drill bit 541 and the second half drill bit 542 are spliced ​​with each other, and the first half drill bit 541 and the second half drill bit 542 are respectively connected to the opening and closing mechanism 52.

[0034] It should be noted that the first half drill bit 541 and the second half drill bit 542 described in this embodiment are conical in the spliced ​​state, and the outer surface of the drill bit 54 is provided with a spiral blade 6, which extends from the top to the bottom of the drill bit 54.

[0035] It should also be noted that the drive motor 55 described in this embodiment is fixedly installed on the mounting platform 3, and the output shaft of the drive motor 55 is coaxially connected to one end of the drill rod 51 through a coupling, and a through groove is provided on the mobile platform 1 for the drill rod 51 and the drill bit 54 to pass through.

[0036] As a possible scenario, the overall structure of the mobile platform 1 is in the shape of a rectangular frame, and the structural stability of the frame is further enhanced by criss-crossing reinforcing ribs inside to ensure that it will not deform when carrying various equipment and tools. Four rubber tires (not specifically marked in the figure) are installed on the bottom of the mobile platform 1. The tires have good shock absorption performance and grip to adapt to the movement needs of different terrains. Each tire is equipped with an independent hydraulically driven steering system. The operator can accurately control the steering angle of the tire through the steering controller on the control console to achieve flexible on-the-spot steering and small-radius turns.

[0037] In addition, a supporting cylinder (not specifically marked in the figure) is installed under each of the four corners of the mobile platform 1. The cylinder body of the supporting cylinder is tightly connected to the bottom frame of the mobile platform 1. When the mobile platform 1 arrives at the predetermined soil sampling location, the operator first starts the supporting cylinder through the operation panel. The piston rod of the supporting cylinder is driven by the hydraulic system and extends downward steadily until it is in close contact with the ground. At this time, the piston rod begins to gradually apply an upward supporting force, slowly lifting the mobile platform 1 and making the tire slightly leave the ground, thereby completely transferring the weight of the platform to the supporting cylinder. In order to ensure that the mobile platform 1 remains level in a fixed state, each supporting cylinder is equipped with an independent pressure sensor and height adjustment device. The operator can monitor the pressure data of each supporting cylinder in real time through the operation panel, and accurately adjust the extension length of the piston rod of each supporting cylinder according to the inclination of the platform.

[0038] For example, when the pressure sensor detects that the pressure in a certain corner is too high, it means that the platform on that side is lower. The operator can control the piston rod of the support cylinder on that side through the operation panel to extend further until the pressure data of the four support cylinders reach a balance, thereby ensuring that the mobile platform 1 is in a horizontal state, ensuring the stability of the mobile platform 1 in a fixed state, and effectively reducing the impact of the platform tilt on the sampling work, thereby improving the accuracy and reliability of sampling.

[0039] In one embodiment of the present application, the opening and closing mechanism 52 may include a fixed cover 521 , a telescopic cylinder 522 , two connecting rods 523 and two sliding rods 524 .

[0040] Among them, the fixed cover 521 is fixedly connected to the bottom end of the drill rod 51, and the shape of the fixed cover 521 is adapted to the shape of the drill rod 51. The cylinder body of the telescopic cylinder 522 is fixedly set in the fixed cover 521, and the piston rod of the telescopic cylinder 522 extends along the central axis direction of the drill rod 51. The sliding rod 524 is composed of a vertical rod 5241 and an oblique rod 5242, and the two sliding rods 524 are spliced ​​together to form a Y shape. Guide rails with the same angle as the two oblique rods 5242 are respectively provided on both sides of the fixed cover 521. The two oblique rods 5242 are respectively provided with guide rails with the same angle as the two oblique rods 5242. It slides with the two guide rails, and the ends of the two oblique rods 5242 away from the vertical rod 5241 respectively pass through the fixed cover 521, one end of the two connecting rods 523 is pivotally connected to the end of the piston rod through a rotating pair, and the other ends of the two connecting rods 523 are pivotally connected to the two vertical rods 5241 through a rotating pair. A connecting groove is provided on the side where the first half drill bit 541 and the second half drill bit 542 are close to each other, and the two vertical rods 5241 are fixedly connected to the first half drill bit 541 and the second half drill bit 542 through the connecting groove.

[0041] In one embodiment of the present application, one end of the two loosening rods 53 is fixedly connected to one end of the two inclined rods 5242 away from each other, and the other ends of the two loosening rods 53 are respectively provided with a sharp portion.

[0042] In one embodiment of the present application, first inclined surfaces with the same angle as the two inclined rods 5242 are respectively provided on both sides of the bottom of the fixed cover 521, and second inclined surfaces adapted to the two first inclined surfaces are respectively provided on the tops of the first half drill bit 541 and the second half drill bit 542.

[0043] Specifically, in the sampling link, the movement of the piston rod of the telescopic cylinder 522 drives the sliding rod 524 to slide along the guide rails on both sides of the fixed cover 521, thereby controlling the opening and closing of the first half drill bit 541 and the second half drill bit 542. At this time, the first inclined surface at the bottom of the fixed cover 521 and the second inclined surface at the top of the half drill bit cooperate with each other to form a guiding structure. When the piston rod of the telescopic cylinder 522 is extended, the sliding rod 524 slides down, and the contact between the first inclined surface and the second inclined surface guides the first half drill bit 541 and the second half drill bit 542 to approach each other and be accurately spliced ​​into a complete drill bit 54. When the piston rod of the telescopic cylinder 522 is retracted, the sliding rod 524 slides up and guides the first half drill bit 541 and the second half drill bit 542 to separate smoothly. This guide ensures the smoothness and accuracy of the drill bit opening and closing action, avoids the half drill bit from getting stuck, offset, etc. during movement, and ensures the efficient implementation of the sampling process.

[0044] In one embodiment of the present application, the lifting mechanism 4 may include a lifting motor 401 , a screw 402 and a slide rail 403 .

[0045] Among them, the slide rail 403 is vertically installed on one side of the support frame 2, and a slider is slidably fitted on the slide rail 403, the mounting platform 3 is fixedly connected to the slider, the screw 402 is rotatably set on the mobile platform 1, one end of the screw 402 passes through the mounting platform 3 and is threadedly connected to the mounting platform 3, the lifting motor 401 is fixedly set on the mobile platform 1, and the output shaft of the lifting motor 401 is coaxially connected to one end of the screw 402 through a coupling.

[0046] Specifically, when taking soil samples, the relevant personnel first control the mobile platform 1 to reach the designated location through the steering controller on the control panel on the mobile platform 1. After arriving at the designated location, the support cylinders under the four corners of the platform are started. The piston rod is extended under hydraulic drive, contacts the ground and lifts the platform, so that the tires are slightly off the ground. At the same time, the operator can adjust the extension length of the piston rod according to the pressure data to ensure that the platform is in a horizontal and stable state.

[0047] After the mobile platform 1 is moved to the predetermined location and stabilized, the lifting motor 401 is started. The output shaft of the lifting motor 401 drives the screw 402 to rotate. Since the mounting platform 3 is threadedly matched with the screw 402 and restricted by the slide rail 403 and the slider, the mounting platform 3 can only move up and down along the slide rail 403, thereby causing the mounting platform 3 and the drilling assembly 5 installed thereon to descend until the drill bit 54 approaches the soil surface.

[0048] Then the relevant personnel start the drive motor 55, which drives the drill rod 51 to rotate at high speed, and then drives the conical drill bit 54 spliced ​​into one to rotate. The drill bit 54 uses its conical structure and the spiral blades 6 extending from the top to the bottom of the outer surface to cut into the soil for drilling.

[0049] When drilling reaches the specified depth, the lifting motor 401 stops running, the piston rod of the telescopic cylinder 522 retracts, and the sliding rod 524 is driven to slide upward through the connecting rod 523. The vertical rod 5241 of the sliding rod 524 drives the first half drill bit 541 and the second half drill bit 542 to separate from each other, and the inclined rod 5242 drives the two loosening rods 53 to extend out of the fixed cover 521 and insert into the outer soil wall. At this time, the drill rod 51 and the drill bit 54 continue to be driven to rotate, stirring and breaking up the soil around the drill bit 54. After the stirring is completed, the piston rod of the telescopic cylinder 522 is extended again, so that the first half drill bit 541 The first half drill bit 541 and the second half drill bit 542 are reset and spliced ​​together to form a complete drill bit 54, and the loosened soil is collected in the sampling cavity between the first half drill bit 541 and the second half drill bit 542. The openable and closable drill bit design allows the soil sample to be fully stirred and broken up during the collection process, ensuring that the collected sample is more representative. The spliced ​​drill bit is tightly closed during sampling, effectively avoiding the soil sample from falling due to vibration, shaking, etc. during the collection and lifting process, ensuring the integrity of the sample and the sufficiency of the sample volume in a single sampling, reducing the number of repeated samplings, and saving time costs.

[0050] After sampling is completed, the lifting motor 401 is started to make the screw 402 rotate in the opposite direction, driving the mounting platform 3 and the drilling assembly 5 to rise, and the drill bit 54 with the collected soil sample rises from the through slot of the mobile platform 1, completing the sample extraction. At this time, the first half drill bit 541 and the second half drill bit 542 can be separated again, and the soil sample can be taken out for subsequent analysis.

[0051] In summary, the sampling device for soil pollution prevention and control of the embodiment of the present application can effectively prevent the soil sample from falling off the device due to vibration, shaking, etc. during the lifting process, and can also effectively deal with hard soil. It can accurately collect samples in deep soil, provide reliable data support for soil pollution assessment, and thus help to formulate more targeted and effective pollution prevention and control measures.

[0052] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0054] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present application.

Claims

1. A sampling device for soil pollution prevention and control, characterized in that: It includes a mobile platform, a support frame, a mounting platform, a lifting mechanism and a drilling assembly, wherein: The support frame is fixedly arranged on the mobile platform; The installation platform is connected to the support frame for vertical sliding, the lifting mechanism is arranged on the mobile platform, and the lifting mechanism is connected to the installation platform; The drilling assembly includes a drill rod, an opening and closing mechanism, two loosening rods and a drill bit, wherein: The drill rod is rotatably mounted on the mounting platform and driven by a drive motor; The opening and closing mechanism is arranged at the bottom of the drill rod, and the two loosening rods are respectively connected to the opening and closing mechanism; The drill bit is composed of two mutually matching first and second drill bit halves, and the first and second drill bit halves are spliced ​​axially in a natural state to form a complete drill bit structure; A sampling cavity is respectively provided on one side where the first drill bit half and the second drill bit half are spliced ​​together, and the first drill bit half and the second drill bit half are respectively connected to the opening and closing mechanism.

2. The sampling device for soil pollution prevention and control according to claim 1, characterized in that: The opening and closing mechanism includes a fixed cover, a telescopic cylinder, two connecting rods and two sliding rods, wherein: The fixed cover is fixedly connected to the bottom end of the drill rod, and the shape of the fixed cover is adapted to the shape of the drill rod; The cylinder body of the telescopic cylinder is fixedly arranged in the fixed cover, and the piston rod of the telescopic cylinder extends along the central axis direction of the drill rod; The sliding rod is composed of a vertical rod and an oblique rod, and two sliding rods are connected to form a Y shape; Guide rails with the same angle as the two oblique rods are respectively provided on both sides of the fixed cover, the two oblique rods are respectively slidably matched with the two guide rails, and the ends of the two oblique rods away from the vertical rods respectively pass through the fixed cover; One end of the two connecting rods is pivotally connected to the end of the piston rod through a rotating pair, and the other end of the two connecting rods is pivotally connected to the two vertical rods through a rotating pair; A connecting groove is respectively provided on one side of the first drill bit half and the second drill bit half where they are close to each other, and the two vertical rods are fixedly connected to the first drill bit half and the second drill bit half through the connecting groove.

3. The sampling device for soil pollution prevention and control according to claim 2, characterized in that: One end of the two loosening rods is respectively fixedly connected to one end of the two oblique rods that are away from each other, and the other ends of the two loosening rods are respectively provided with a sharp portion.

4. The sampling device for soil pollution prevention and control according to claim 2, characterized in that: Both sides of the bottom of the fixed cover are respectively provided with first inclined surfaces with the same angle as the two inclined rods, and the tops of the first half drill bit and the second half drill bit are respectively provided with second inclined surfaces adapted to the two first inclined surfaces.

5. The sampling device for soil pollution prevention and control according to claim 1, characterized in that: The first drill bit half and the second drill bit half are conical in the spliced ​​state; The outer surface of the drill bit is provided with a spiral blade, and the spiral blade extends from the top to the bottom of the drill bit.

6. The sampling device for soil pollution prevention and control according to claim 1, characterized in that: The lifting mechanism includes a lifting motor, a screw and a slide rail, wherein: The slide rail is vertically mounted on one side of the support frame, and a slider is slidably fitted on the slide rail; The mounting platform is fixedly connected to the slider; The screw is rotatably arranged on the mobile platform, and one end of the screw passes through the mounting platform and is threadedly connected to the mounting platform; The lifting motor is fixedly arranged on the mobile platform, and the output shaft of the lifting motor is coaxially connected to one end of the screw through a coupling.

7. The sampling device for soil pollution prevention and control according to claim 1, characterized in that: The drive motor is fixedly arranged on the mounting platform, and the output shaft of the drive motor is coaxially connected to one end of the drill rod through a coupling.

8. The sampling device for soil pollution prevention and control according to claim 1, characterized in that: The movable platform is provided with a through slot for the drill rod and the drill bit to pass through.

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