An automatic detection device for heavy metal content in contaminated soil

Abstract

The present invention belongs to the technical field of soil detection, and specifically relates to an automatic detection device for heavy metal content in contaminated soil, comprising a portable soil metal detection instrument and an automatic collection device, wherein the automatic collection device comprises a mobile body, a collection body, and an intelligent control center, and the collection body is used to automatically collect and detect soil samples to be tested in a target area. The present invention ensures the integrity of the collected soil samples to be tested by cooperating with a sampling tube and a collection tube, and reduces the mixing between different parts of the soil samples to be tested in the vertical direction. During detection, an atomic absorption spectrometer is used, and through spectral analysis, the principle that heavy metal atoms contained in the sample absorb light radiation of a specific wavelength, and the amount of absorption is proportional to the content of the element to be tested, is used to achieve quantitative analysis of heavy metals, accurately reflect the metal content at different soil layer depths at the test point, and provide information support for formulating a plan for controlling heavy metal pollution in soil samples.

Description

Technical Field

[0001] The invention belongs to the technical field of geological detection, in particular to an automatic detection device for heavy metal content in contaminated soil. Background Art

[0002] The development of soil around mines can easily lead to heavy metal contamination of the surrounding soil. The main heavy metal elements that contaminate soil include mercury, cadmium, lead, copper, chromium, nickel, and zinc. Arsenic is often included in this category because its behavior, sources, and hazards are similar to those of heavy metals. In terms of plant needs, these elements can be divided into two categories: one is elements that are not required for plant growth and development, but pose significant risks to human health, such as cadmium, mercury, and lead; the other is elements that are required for normal plant growth and development and have certain physiological functions in the human body, such as copper and zinc, but excessive amounts can cause pollution and hinder plant growth and development.

[0003] Heavy metal contamination of soil is insidious, chronic, and irreversible. These heavy metals can originate from a variety of sources, including industrial emissions, the irrational use of agricultural fertilizers and pesticides, and mineral extraction. Once soil is contaminated with heavy metals, it not only affects the growth and quality of crops but can also enter the human body through the food chain, posing a serious threat to human health.

[0004] Accurate soil heavy metal testing can identify pollution issues promptly. Professional testing agencies use advanced equipment and scientific testing methods to accurately measure the content of various heavy metals in the soil: cadmium, mercury, lead, chromium, arsenic, nickel, and other heavy metals can all be detected one by one.

[0005] When testing soil samples in contaminated areas, it is necessary to select sampling points on the ground in the target area in advance. Existing contaminated soil sampling usually uses manual collection methods, which is inefficient and not suitable for large areas that require multi-point sampling. In addition, during sampling, the collected soil samples are easily mixed together, making it difficult to fully and accurately reflect the heavy metal pollution conditions in different depth areas of the contaminated soil. The collection of soil samples at different depths in the same area often requires multiple manual excavation and sampling, which affects the detection efficiency. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes an automatic detection device for heavy metal content in contaminated soil.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: the present invention proposes an automatic detection device for heavy metal content in contaminated soil, including an atomic absorption spectrometer and an automatic collection device. The automatic collection device includes a mobile body, a collection body and an intelligent control center. The collection body is used to automatically collect and detect soil samples to be tested in a target area;

[0008] The collection body includes an installation box, the installation box is arranged at the bottom of the mobile body, an installation cavity is arranged inside the installation box, and a plurality of sampling components are evenly arranged inside the installation cavity;

[0009] The sampling assembly includes a sampling tube, which is connected to the telescopic end of the first-level telescopic device at the top of the installation cavity, and a rotating device is provided on the telescopic end of the first-level telescopic device. The output end of the rotating device is connected to the top of the sampling tube to drive the sampling tube to rotate relative to the first-level telescopic device; a detection port is provided at the bottom of the installation cavity corresponding to the sampling tube;

[0010] The bottom outlet of the sampling tube is conical, and serrated cutting teeth are evenly arranged on the edge of the bottom outlet of the sampling tube; a collecting tube is slidably embedded in the interior of the sampling tube, the bottom opening of the collecting tube is opposite to the bottom outlet of the sampling tube, and sampling holes are evenly arranged on the outer surface of the side wall of the collecting tube along the vertical direction.

[0011] Preferably, a crawler-type walking mechanism is provided at the bottom of the mobile body, a safety sensor is provided on the side wall of the mobile body, and a detection camera is provided on the top.

[0012] Preferably, the sampling assembly further comprises a replacement chute, wherein the replacement chute is located inside the installation cavity; the replacement chute comprises a filling section and a separation section, wherein the filling section and the separation section are distributed along the same straight line, and the sampling tube is located between the filling section and the separation section;

[0013] Replacement grooves are provided at positions on both sides of the sampling tube corresponding to the filling section and the separation section, and the replacement grooves coincide with the openings of the filling section and the separation section;

[0014] The inner wall of the filling section is provided with a propulsion device, which is used to push the collecting pipe to slide along the inner wall of the filling section; the end of the inner wall of the separation section is provided with a limiting device, which is used to limit the sliding distance of the collecting pipe.

[0015] Preferably, both sides of the outer surface of the collecting tube are convex, and the surface of the convex part is an arc-shaped structure.

[0016] Preferably, a mounting hole is provided on the top of the collecting tube, a limiting protrusion is slidably provided inside the mounting hole, the limiting protrusion is elastically connected to the inner wall of the mounting hole, and the top of the limiting protrusion is conical;

[0017] A positioning hole is provided on the lower surface of the top of the sampling tube corresponding to the limiting protrusion, and the inner surface of the positioning hole is conical; the mounting hole penetrates downward into the interior of the sampling tube, and a spiral limiting groove is provided on the inner wall of the collection tube; an inflation device is provided on the top of the sampling tube, and the air outlet end of the inflation device is communicated with the interior of the sampling tube through the positioning hole.

[0018] Preferably, a cleaning plate is provided at the bottom of the limiting protrusion, the cleaning plate is a circular plate structure, and the cleaning plate is slidably connected to the inner wall of the collection tube, and the upper surface of the cleaning plate is magnetically fixed to the top inner wall of the collection tube.

[0019] Preferably, a secondary telescopic device is provided in the top of the sampling tube, and a connecting head is provided at the telescopic end of the secondary telescopic device. The connecting head is slidably connected to the through hole provided in the middle position of the inner wall of the positioning hole. The connecting head is provided with an electromagnet, and the top of the limiting protrusion is made of iron.

[0020] Preferably, the inflatable device is located in the telescopic end of the secondary telescopic device, and the air outlet end of the inflatable device is communicated with the connector of the tubular structure;

[0021] The cleaning plate is hollow inside to form a cleaning cavity. A connecting hole is provided on the top of the limiting protrusion, and the connecting hole is communicated with the cleaning cavity. Impact holes are evenly provided on the bottom edge of the cleaning plate, and the impact holes are communicated with the inside of the cleaning cavity.

[0022] Preferably, a cleaning strip is provided inside the impact hole, the cleaning strip is slidably connected to the impact hole, and an end of the cleaning strip is connected to an end of the impact hole via an elastic member.

[0023] Preferably, the limiting protrusion is rotatably connected to the cleaning plate, and the end of the cleaning strip is made of elastic material, and the limiting groove extends downward to the bottom opening of the sampling tube;

[0024] A cleaning hole is provided inside the cleaning bar, and the cleaning hole passes through the cleaning bar and extends to both side ends of the cleaning bar.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1. The automatic detection equipment for heavy metal content in contaminated soil described in the present invention is characterized in that serrated cutting teeth are evenly arranged on the edge of the bottom tube opening of the sampling tube, so that the continuously rotating bottom of the sampling tube can smoothly cut the soil layer, so that the sampling tube is smoothly embedded in the soil layer, and the part of the soil layer corresponding to the inside of the sampling tube is embedded in the sampling tube to form a cylindrical soil sample to be tested; the soil sample to be tested is upwardly embedded in the collecting tube inside the sampling tube, so that when the soil sample to be tested is subsequently taken out, it is only necessary to pull out the collecting tube in the sampling tube to ensure the integrity of the test sample, and the soil sample to be tested is limited, thereby reducing the possibility of mixing between different parts of the soil sample to be tested in the vertical direction during the sample removal process.

[0027] 2. The automatic detection equipment for heavy metal content in contaminated soil described in the present invention, during detection, uses sampling holes evenly arranged on the side wall of the collection tube, sampling tubes or tweezers and other tools to sequentially extract soil samples from sampling holes at different vertical heights, and puts them into detection containers respectively. The metal content of the soil samples in the detection containers is detected using an atomic absorption spectrometer, and the samples are labeled and recorded in an experimental data table, so that the metal content at different soil layer depths of the test points can be more accurately reflected; the above operation is then repeated to detect each test point in the target area, and finally the data is input into an analysis computer to mark the metal content distribution and penetration of the soil geological environment around the mining development area, thereby obtaining the soil heavy metal pollution situation in the target area, and feeding back to the control personnel to provide information support for the formulation of a soil sample heavy metal pollution control plan. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] Figure 1 is a perspective view of the present invention;

[0030] Figure 2 It is a three-dimensional diagram of another perspective of the present invention;

[0031] Figure 3 It is a diagram of the internal structure of the collection body in the present invention;

[0032] Figure 4 is a cross-sectional view of the sampling tube of the present invention;

[0033] Figure 5 yes Figure 4 A partial enlarged view of point A in the middle;

[0034] Figure 6 yes Figure 5 A partial enlarged view of point B in the middle;

[0035] Figure 7 is a three-dimensional diagram of the sampling tube of the present invention;

[0036] Figure 8 This is a schematic diagram of the sampling tube after removing the collection tube in the present invention;

[0037] Figure 9 It is a three-dimensional diagram of the collecting tube in the present invention.

[0038] In the figure: mobile body 1, collection body 2, installation box 21, installation cavity 22, sampling assembly 3, sampling tube 31, cutting teeth 311, replacement groove 312, positioning hole 313, inflation device 314, secondary telescopic device 315, connector 316, primary telescopic device 32, rotating device 33, detection port 34, collection tube 35, sampling hole 351, installation hole 352, limiting protrusion 353, limiting groove 354, connecting hole 355, replacement slide 36, filling section 361, separation section 362, propulsion device 363, limiting device 364, cleaning plate 37, cleaning cavity 371, impact hole 372, cleaning strip 373, cleaning hole 374. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings shown in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] Example 1:

[0041] In order to effectively solve the above problems, as shown in the accompanying drawings of the specification Figures 1-9 As shown, an automatic detection device for heavy metal content in contaminated soil includes an atomic absorption spectrometer and an automatic collection device. The automatic collection device includes a mobile body 1, a collection body 2 and an intelligent control center. The collection body 2 is used to automatically collect and detect soil samples to be tested in the target area;

[0042] The collection body 2 includes a mounting box 21, which is arranged at the bottom of the mobile body 1. The mounting box 21 is provided with a mounting cavity 22 inside. A plurality of sampling components 3 are evenly arranged inside the mounting cavity 22. The atomic absorption spectrometer is used to perform spectral analysis on the soil samples collected by the sampling components 3 to calculate the heavy metal concentration of the target land.

[0043] The sampling assembly 3 includes a sampling tube 31, which is connected to the telescopic end of the first telescopic device 32 at the top of the installation chamber 22. A rotating device 33 is provided at the position where the telescopic end is connected to the top of the sampling tube 31, for driving the sampling tube 31 to rotate relative to the first telescopic device 32. The first telescopic device 32 can be an existing electric telescopic device, and the rotating device 33 can be an existing rotating motor device, both of which are controlled by the intelligent control center. A detection port 34 is provided at the bottom of the installation chamber 22 at a position corresponding to the sampling tube 31. The detection port 34 is larger than the diameter of the sampling tube 31, so that the vertically telescopic sampling tube 31 can be easily passed through the detection port 34.

[0044] The bottom outlet of the sampling tube 31 is conical, and serrated cutting teeth 311 are evenly arranged on the edge of the bottom outlet of the sampling tube 31; a collection tube 35 is slidably embedded in the sampling tube 31, and the bottom opening of the collection tube 35 is directly opposite the bottom outlet of the sampling tube 31. The outer surface of the side wall of the collection tube 35 is evenly arranged with sampling holes 351 along the vertical direction, and the outer surface of the sampling holes 351 can be provided with height scale lines. By inserting the sampling holes 351 corresponding to different heights for sampling, the soil samples obtained can more intuitively and accurately reflect the soil heavy metal pollution corresponding to different soil depths.

[0045] Specific workflow: In order to conduct a more comprehensive investigation of the geological environment around the mine, one of the important tasks is to investigate the geological environment of the heavy metal contaminated areas formed due to the deterioration of the geological environment caused by mining around the mine. Compared with manual collection of samples for detection and analysis, this can be achieved through automated collection of contaminated soil areas around the mine. Specifically, the inspection personnel issue control commands through remote control, so that the intelligent control center controls the mobile body 1 and drives the collection body 2 to move. For target areas with larger areas, points to be tested with similar spacing are selected to present a grid distribution, fully covering the target area to be tested, so that the final detection results can fully reflect the distribution of metal pollution in the target area.

[0046] After the collection body 2 and the mobile body 1 stop at the point to be measured, the first-level telescopic device 32 is controlled to start. The vertical downward telescopic end pushes the sampling tube 31 at the bottom of the collection body 2 to slide downward, pass through the detection port 34 and contact the ground at the point to be measured. Then, the rotating device 33 on the telescopic end is activated, driving the sampling tube 31 to rotate while continuing to move downward into the soil layer at the point to be measured;

[0047] The edge of the bottom tube opening of the sampling tube 31 is evenly provided with serrated cutting teeth 311, so that the bottom of the continuously rotating sampling tube 31 can smoothly cut the soil layer, so that the sampling tube 31 can be smoothly embedded in the soil layer, and the part of the soil layer corresponding to the inside of the sampling tube 31 is embedded in the sampling tube 31, forming a cylindrical soil sample to be tested; because the inner wall of the collecting tube 35 is aligned with the inner wall of the sampling tube 31, the test sample is upwardly embedded in the collecting tube 35 inside the sampling tube 31, so that when the soil sample to be tested is subsequently taken out, it is only necessary to pull out the collecting tube 35 in the sampling tube 31, so as to ensure the integrity of the test sample, and the soil sample to be tested is limited, thereby reducing the possibility of mixing between different parts of the soil sample to be tested in the vertical direction during the sample removal process;

[0048] During the test, soil samples from the sampling holes 351 at different vertical heights are sequentially extracted through the sampling holes 351 evenly arranged on the side wall of the collection tube 35 using a sampling tube or a tool such as tweezers, and transported to the test station;

[0049] During the specific detection process, an atomic absorption spectrometer is used to detect the samples in the detection container. Through spectral analysis, the heavy metal atoms contained in the samples absorb light radiation of a specific wavelength during the detection process, and the absorption amount is proportional to the content of the element being measured, thereby realizing quantitative analysis of heavy metals; the samples obtained from different soil layer depths are detected separately, and the obtained detection data are recorded in the experimental data table after being numbered according to the different soil layer depths, so that the metal content of different soil layer depths at the test point can be more accurately reflected; then the above operation is repeated to detect each test point in the target area, and finally the data is input into the analysis computer, and the metal content distribution and penetration of the entire target area are marked, so as to obtain the soil heavy metal pollution situation in the target area, and feedback is given to the treatment personnel to provide information support for the formulation of soil heavy metal pollution control plan around the mining area.

[0050] Example 2:

[0051] On the basis of the first embodiment, there are multiple options for the mobile body 1 of the present application. For a target area to be measured with a larger coverage area, an intelligent drone can be selected as the mobile body 1, and the collection body 2 can be installed on the lower side of the mobile body 1. By operating the intelligent drone as the mobile body 1, it can stay at the evenly distributed points to be measured, and then collect soil samples from the points to be measured; for a target area with a smaller coverage area, an intelligent walking car that can be remotely controlled can also be selected, and a crawler-type walking mechanism is set at the bottom of the intelligent walking car as the mobile body 1, and a safety sensor is set on the side wall of the mobile body 1, and a detection camera is set on the top, so as to facilitate the collection of information around the walking road, feedback to the operation end, and adjust according to the road conditions at any time;

[0052] Specific work flow: Based on the specific work flow in Example 1, for the mobile body 1 in Example 1, the present application provides a possible technical solution, which selects an intelligent walking car that is convenient for walking on the ground as the mobile body 1; the existing intelligent unmanned mobile car is equipped with a crawler walking mechanism, which can adapt to the complex terrain of the target area. The inspection personnel remotely control the mobile body 1 to move in the target area, and a detection camera is set on the mobile body 1, which can feed back the surrounding image information to the operating end where the inspection personnel is located, so that the operator can remotely control the mobile body 1 to bypass the impassable area and control the mobile body 1 to smoothly go to the test point; and the safety sensors include balance sensors and collision sensors, etc., which feedback the mobile balance and stability of the mobile body 1, facilitate the internal intelligent control center to automatically adjust, reduce accidents such as rollover of the mobile body 1, and ensure the smooth progress of normal inspection of the target contaminated area.

[0053] Example 3:

[0054] Based on the second embodiment, the sampling assembly 3 further includes a replacement chute 36, which is fixedly mounted inside the mounting cavity 22 and includes a filling section 361 and a separation section 362. The filling section 361 and the separation section 362 are arranged along the same straight line inside the mounting cavity 22, and the sampling tube 31 is located between the filling section 361 and the separation section 362. Replacement grooves 312 are provided on both sides of the sampling tube 31 at locations corresponding to the filling section 361 and the separation section 362. The replacement grooves 312 coincide with the openings of the filling section 361 and the separation section 362.

[0055] A propulsion device 363 is provided at the end of the inner wall of the filling section 361. The propulsion device 363 can be an electric telescopic device. The telescopic end of the propulsion device 363 is against the collection tube 35 arranged inside the filling section 361. As the telescopic end of the propulsion device 363 is extended, the propulsion device 363 can push the collection tube 35 to slide along the inner wall of the filling section 361; a limiting device 364 is provided at the end of the inner wall of the separation section 362. The limiting device 364 can be an existing electric telescopic device. The telescopic end of the limiting device 364 is against the collection tube 35 arranged in the separation section 362. As the telescopic end of the limiting device 364 is extended or retracted, it cooperates with the propulsion device 363 to control the sliding position of the evenly arranged collection tubes 35 on the replacement slide 36, so that the sliding distance of the collection tube 35 is limited; the outer surface of the collection tube 35 is convex on both sides, and the surface of the convex part is a circular arc structure.

[0056] Specific work flow: Based on the specific work flow in Example 2, after the mobile body 1 reaches the point to be tested, the sampling assembly 3 located inside the mobile body 1 moves, and the telescopic end of the propulsion device 363 extends and pushes the collecting tubes 35 evenly arranged on the filling section 361 laterally, so that the collecting tubes 35 slide laterally along the filling section 361 and pass through the corresponding replacement groove 312 on the side wall of the sampling tube 31 to enter the interior of the sampling tube 31. At the same time, the telescopic end of the limiting device 364 on the other side retreats until the collecting tube 35 enters the interior of the sampling tube 31. At this time, the sampling tube 31 located between the propulsion device 363 and the limiting device 364 is squeezed and limited on both sides and stably embedded in the inner wall of the sampling tube 31. The outer wall surfaces of both sides of the collecting tube 35 fill the gaps in the replacement grooves 312 on both sides and are aligned with the surrounding outer surfaces of the collecting tube 35 to form a complete arc surface; and the inner wall of the collecting tube 35 is aligned with the inner wall of the sampling tube 31, so that the embedded cylindrical soil sample to be tested is conveniently embedded into the collecting tube 35;

[0057] After the test is completed and the collection tube 35 is filled with the soil sample to be tested, the propulsion device 363 is controlled to move forward and the limiting device 364 is controlled to move backward to fill the collection tube 35 with the next collection tube 35. The collection tube 35 originally located inside the sampling tube 31 drives the soil sample to be tested inside to move horizontally out of the sampling tube 31 and embed into the replacement chute 36 of the separation section 362. At this time, the bottom surface of the separation section 362 slides in contact with the bottom pipe opening of the collection tube 35, so that the bottom pipe opening of the collection tube 35 moved to the separation section 362 is closed, and the soil sample to be tested inside is limited.

[0058] As the new collection tube 35 is filled into the sampling tube 31, the mobile body 1 can go to the next test point to continue the contaminated soil detection operation; such a filling and replacement process allows the multiple collection tubes 35 evenly distributed on the filling section 361 to alternately collect and store the soil samples to be tested, so that the same sampling component 3 can perform repeated operations multiple times. After all the collection tubes 35 are used up, the next sampling component 3 is replaced for sampling, and there is no need to manually remove the sample to be tested after each test; according to the number of test points, the number of collection tubes 35 to be placed can be determined, so that after completing the sampling and testing of all test points, it is possible to return and take out all the collection tubes 35 for separate testing, reducing the time consumed by manual operation and improving the detection efficiency of the target contaminated soil.

[0059] Example 4:

[0060] On the basis of the third embodiment, a mounting hole 352 is provided at the top of the collecting tube 35, and a limiting protrusion 353 is slidably provided inside the mounting hole 352. The limiting protrusion 353 is elastically connected to the inner wall of the mounting hole 352 via an elastic member, and the top of the limiting protrusion 353 is conical;

[0061] A positioning hole 313 is provided on the lower surface of the top of the sampling tube 31 at a position corresponding to the limiting protrusion 353. The inner surface of the positioning hole 313 is tapered. The mounting hole 352 extends downwardly into the interior of the collection tube 35, and a spiral limiting groove 354 is provided on the inner wall of the collection tube 35. An inflation device 314 is provided on the top of the sampling tube 31. The air outlet end of the inflation device 314 communicates with the interior of the sampling tube 31 through the positioning hole 313. The inflation device 314 here can be a micro air pump device.

[0062] Specific working process: Based on the specific working process in Example 3, the end of the limiting protrusion 353 provided on the top of the collection tube 35 is squeezed in the replacement slide groove 36 and pressed into the interior of the mounting hole 352; when the pushing device 363 is started to push the collection tube 35 into the interior of the sampling tube 31 and fill it to the middle position inside the sampling tube 31, the limiting protrusion 353 moves to the lower side of the positioning hole 313. At this time, the limiting protrusion 353 is no longer squeezed and extends upward under the action of the connected elastic member to be embedded in the positioning hole 313; because the limiting protrusion 353 is conical and the inner wall of the positioning hole 313 is also conical, the end of the limiting protrusion 353 is guided by the curved inner wall of the positioning hole 313 to align with the center position of the positioning hole 313, thereby prompting the collection tube 35 to be stably limited in the middle position inside the sampling tube 31;

[0063] After completing the collection of the soil sample to be tested at the test point, the inflation device 314 is started, so that the air flow flows downward from the positioning hole 313, impacting the limiting protrusion 353 embedded in the positioning hole 313, causing it to move downward, thereby releasing the mutual embedding between the limiting protrusion 353 and the positioning hole 313 and limiting the collection tube 35. At the same time, the propulsion device 363 and the limiting device 364 are started, prompting the collection tube 35 to slide horizontally out of the sampling tube 31 and enter the separation section 362 on the other side, and the next collection tube 35 is then embedded in the sampling tube 31, alternately playing the role of collecting the soil samples to be tested;

[0064] The collection tube 35 inside the sampling tube 31 has an exchange gap. The downward airflow can flush the soil sample remaining in the lower area of the collection tube 35 inside the sampling tube 31, accelerating it to move downward and out of the sampling tube 31. This allows the inside of the sampling tube 31 to be cleaned, making it easier to fill a new collection tube 35 before sampling the next point to be measured.

[0065] Furthermore, a spiral limiting groove 354 is provided on the inner wall of the collecting tube 35, which can increase the relative friction between the cylindrical soil sample to be tested and the embedded cylindrical soil sample; in this way, after the sampling operation is completed, the limiting groove 354 can cause the cylindrical soil sample to be tested filled in the collecting tube 35 to remain intact and stable under the action of friction, thereby reducing the disintegration and dispersion of the soil sample to be tested and the mixing together, thereby ensuring that the test results can more accurately reflect the heavy metal content at different depths of the soil layer.

[0066] Embodiment 5:

[0067] On the basis of the fourth embodiment, a cleaning plate 37 is provided at the bottom of the limiting protrusion 353. The cleaning plate 37 is a circular plate structure and is slidably connected to the inner wall of the collection tube 35. The cleaning plate 37 and the top inner wall of the collection tube 35 are fixed by magnetic attraction. Specifically, a magnet can be provided on the edge of the upper surface of the cleaning plate 37, and the corresponding position on the top inner wall of the collection tube 35 can be provided with iron to achieve magnetic fixation.

[0068] A secondary telescopic device 315 is provided at the top of the sampling tube 31. A connector 316 is provided at the telescopic end of the secondary telescopic device 315. The connector 316 is slidably connected to a through hole provided in the middle of the inner wall of the positioning hole 313. The connector 316 is provided with an electromagnet, and its power supply is controlled by the intelligent control center. The top of the limiting protrusion 353 is made of iron.

[0069] The inflatable device 314 is located in the telescopic end of the secondary telescopic device 315, and the air outlet end of the inflatable device 314 is connected to the connector 316 of the tubular structure. The telescopic end of the secondary telescopic device 315 is also a hollow tubular structure. The inflatable device 314 is located in the hollow area. The side wall of the telescopic end of the secondary telescopic device 315 is provided with an air hole above the position of the inflatable device 314 to facilitate the intake of external air, which is then directed downward into the cleaning chamber 371 through the air outlet end of the inflatable device 314.

[0070] The cleaning plate 37 is hollow inside to form a cleaning chamber 371. The top of the limiting protrusion 353 is provided with a connecting hole 355, which communicates with the cleaning chamber 371. The bottom edge of the cleaning plate 37 is evenly provided with impact holes 372, which communicate with the interior of the cleaning chamber 371.

[0071] Specific workflow: Based on the specific workflow of the fourth embodiment, after the sampling operation is completed, the sampling tube 31 filled with the soil sample to be tested slides horizontally out of the sampling tube 31 and moves to the separation section 362. The sampling tube 31 located at the front of the filling section 361 is embedded in the collection tube 35, ready for the next sampling operation.

[0072] During the above process, before the sampling tube 31 filled with the soil sample to be tested is detached, the secondary telescopic device 315 located at the top of the sampling tube 31 can be controlled to start, extend from the middle through-hole position of the positioning hole 313 and contact the top of the limiting protrusion 353, and then the telescopic end continues to move downward to push the limiting protrusion 353 downward, ensuring that the mutual embedding between the limiting protrusion 353 and the positioning hole 313 on the collection tube 35 is smoothly released, so that the sampling tube 31 can be filled and replaced smoothly;

[0073] Because the area inside the sampling tube 31 below the collecting tube 35 may still contain soil samples, which may affect the smooth progress of the next sampling operation, when the collecting tube 35 is moved into the sampling tube 31, the limiting protrusion 353 on the collecting tube 35 is embedded in the positioning hole 313; the secondary telescopic device 315 can be started again, so that the connecting head 316 on the telescopic end of the secondary telescopic device 315 moves downward and contacts the opening of the communicating hole 355 on the end of the limiting protrusion 353, and the corresponding electromagnet on the connecting head 316 is started, so that the connecting head 316 and the limiting protrusion 353 are magnetically fixed.

[0074] Then, the secondary telescopic device 315 continues to move downward, so that the limiting protrusion 353 moves downward and drives the cleaning plate 37, releasing the magnetic attraction between the cleaning plate 37 and the top inner wall of the collection tube 35. The cleaning plate 37 continues to move downward and separates from the collection tube 35, and moves downward into the sampling tube 31, and pushes the soil sample remaining in the sampling tube 31 downward into the sampling tube 31 until the cleaning plate 37 moves downward to the bottom tube mouth of the sampling tube 31, ensuring that the soil sample remaining at the bottom of the sampling tube 31 is fully cleaned, ensuring the smooth progress of subsequent sampling operations;

[0075] Furthermore, the air filling device 314 is activated, so that the airflow enters the connector 316, then flows downward into the connecting hole 355 on the limiting protrusion 353, and flows downward to fill the cleaning chamber 371 inside the cleaning plate 37; thus, during the downward movement of the cleaning plate 37, the airflow flows out from the impact hole 372 at the bottom edge of the cleaning plate 37, and as the cleaning plate 37 moves downward, it flushes the soil adhering to the inner wall of the sampling tube 31, thereby fully cleaning the inner wall of the sampling tube 31 and preventing the residual soil from being mixed into the soil sample to be tested collected at another test point next time, thereby affecting the accuracy of the test results;

[0076] Furthermore, after the sampling tube 31 moves upward, if it is found that the soil sample collected inside the collection tube 35 is too loose, has collapsed and mixed, and does not meet the sampling standards, the secondary telescopic device 315 can be directly started to drive the cleaning plate 37 to move downward to scrape off the soil sample inside the collection tube 35 and the residual soil in the lower sampling tube 31; at the same time, the impact airflow released after the inflation device 314 is started flows into the cleaning plate 37 and then flows out from the impact hole 372, impacting the residual soil on the inner wall of the collection tube 35, and the downward impact airflow flows downward in a spiral along the spirally distributed limiting groove 354, so that the stagnation time of the airflow inside the collection tube 35 is increased, the flow path is extended, and the contact range is increased, thereby fully removing the residual soil sample inside the collection tube 35. In this way, after re-sampling, it can be avoided that a large amount of residual soil samples are mixed into the newly collected samples, affecting the accuracy of the test results.

[0077] Example 6:

[0078] On the basis of the fifth embodiment, a cleaning strip 373 is provided inside the impact hole 372. The cleaning strip 373 is slidably connected to the impact hole 372, and the end of the cleaning strip 373 is connected to the end of the impact hole 372 by an elastic member. The elastic member here can be an elastic rope.

[0079] The limiting protrusion 353 is rotatably connected to the cleaning plate 37, and the elastic member used for the elastic connection between the limiting protrusion 353 and the cleaning plate 37 is also an elastic rope. When the collection tube 35 slides inside the replacement chute 36, the limiting protrusion 353 is pressed downward by the top inner wall of the replacement chute 36, and the connected elastic rope is stretched. When the collection tube 35 enters the sampling tube 31, the elastic rope is connected to the limiting protrusion 353, pulling it upward and embedding it into the positioning hole 313.

[0080] The end of the cleaning strip 373 is made of elastic material, and the limiting groove 354 extends downward to the bottom opening position of the sampling tube 31; a cleaning hole 374 is provided inside the cleaning strip 373, and the cleaning hole 374 passes through the cleaning strip 373 and extends to the ends on both sides of the cleaning strip 373.

[0081] Specific working process: Based on the specific working process in Example 5, the impact hole 372 is communicated with the cleaning chamber 371. After the inflation device 314 inflates the cleaning chamber 371, the air pressure inside the cleaning chamber 371 increases. While the airflow flows outward along the impact hole 372, it drives the cleaning strip 373 located in the impact hole 372 to slide outward. The end of the cleaning strip 373 extends out of the impact hole 372 opening. When the cleaning plate 37 moves downward, the inner walls of the collection tube 35 and the sampling tube 31 are cleaned in turn; when the elastic end of the cleaning strip 373 contacts the inner wall, the end of the cleaning strip 373 slides to scrape off the dirt and impurities adhering to the inner wall, so that the dirt that is relatively tightly adhered to the inner walls of the collection tube 35 and the sampling tube 31 is also detached under the scraping action of the cleaning strip 373;

[0082] At the same time, part of the airflow in the impact hole 372 flows into the cleaning hole 374 in the middle of the cleaning strip 373 and flows out from the opening at the end of the cleaning strip 373. As the cleaning strip 373 scrapes the adhered dirt, the impact airflow from the end opening improves the cleaning effect of the adhered dirt and also causes the dirt adhered to the scraping end of the cleaning strip 373 to fall off due to the impact.

[0083] When the cleaning plate 37 moves to the position of the serrated cutting teeth 311 at the bottom of the sampling tube 31, the end of the cleaning strip 373 can be embedded in the gap between the cutting teeth 311, and the cleaning strip 373 guides the airflow flowing inside the impact hole 372. As the end of the cleaning strip 373 impacts the gap between the cutting teeth 311, the dirt adhering to the gap between the cutting teeth 311 is accelerated to fall off.

[0084] As the cleaning plate 37 moves downward, the cleaning strips 373 extending from the edge come into contact with the spiral limiting groove 354, and under the guidance of the limiting groove 354, the cleaning plate 37 tends to rotate relative to the limiting protrusion 353. The rotating cleaning plate 37 drives the cleaning strips 373 to scrape the dirt adhered to the inner wall of the limiting groove 354 laterally, accelerating its falling. The rotation between the cleaning plate 37 and the limiting protrusion 353 stretches the elastic rope connected thereto. When the length of the elastic rope increases to a certain limit and can overcome the cleaning plate 37, the elastic rope pulls the cleaning plate 37 to rotate in the opposite direction and reset. In this way, during the downward movement of the cleaning plate 37, the above-mentioned rotation and reset process is repeated, so that the inner walls of the collection tube 35 and the sampling tube 31 are repeatedly cleaned, thereby ensuring the smooth progress of subsequent sampling operations.

[0085] After the cleaning operation is completed, the inflation device 314 stops starting, and the airflow impact on the cleaning strip 373 disappears, so the cleaning strip 373 is reset under the action of the connected elastic member, and at the same time the cleaning plate 37 moves up and resets, and is magnetically fixed to the top position of the inner wall of the sampling tube 31 again, so that subsequent sampling operations can be carried out smoothly.

[0086] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic detection device for heavy metal content in contaminated soil, comprising an atomic absorption spectrometer and an automatic data acquisition device, wherein the automatic data acquisition device comprises a mobile body, a data acquisition body, and an intelligent control center, and is characterized by: The collection body includes an installation box, which is arranged at the bottom of the mobile body. The installation box is provided with an installation cavity inside. Multiple sampling components are evenly arranged inside the installation cavity. The atomic absorption spectrometer is used to perform spectral analysis on the soil samples collected by the sampling components and calculate the heavy metal concentration of the target land; The sampling assembly includes a sampling tube, which is connected to the telescopic end of the first-level telescopic device at the top of the installation cavity. A rotating device is provided at the position where the telescopic end is connected to the top of the sampling tube, for driving the sampling tube to rotate relative to the first-level telescopic device. A detection port is provided at the bottom of the installation cavity corresponding to the sampling tube, and the detection port is larger than the diameter of the sampling tube. The bottom outlet of the sampling tube is conical, and serrated cutting teeth are evenly arranged on the edge of the bottom outlet of the sampling tube; a collecting tube is slidably embedded in the sampling tube, the bottom opening of the collecting tube is directly opposite to the bottom outlet of the sampling tube, and the outer surface of the side wall of the collecting tube is evenly arranged with sampling holes along the vertical direction; The sampling assembly also includes a replacement chute, which is fixedly installed inside the installation cavity and includes a filling section and a separation section. The filling section and the separation section are distributed along the same straight line inside the installation cavity, and the sampling tube is located between the filling section and the separation section. Replacement slots are provided on both sides of the sampling tube at positions corresponding to the filling section and the separation section, and the replacement slots coincide with the openings of the filling section and the separation section. A propulsion device is provided at the end of the inner wall of the filling section, and the telescopic end of the propulsion device abuts against the collection pipe arranged inside the filling section; a limiting device is provided at the end of the inner wall of the separation section, and the telescopic end of the limiting device abuts against the collection pipe arranged in the separation section; As the telescopic end of the limiting device extends or retracts, it cooperates with the propulsion device to control the sliding position of the evenly arranged collection pipes on the replacement chute, so that the sliding distance of the collection pipes is limited; the outer surface of the collection pipe is convex on both sides, and the surface of the convex part is an arc-shaped structure; A mounting hole is provided at the top of the collecting pipe, a limiting protrusion is slidably provided inside the mounting hole, the limiting protrusion is elastically connected to the inner wall of the mounting hole via an elastic member, and the top of the limiting protrusion is conical; A positioning hole is provided on the lower surface of the top of the sampling tube at a position corresponding to the limiting protrusion, and the inner surface of the positioning hole is tapered; the mounting hole extends downwardly into the interior of the collection tube, and an inflation device is provided on the top of the sampling tube, and the air outlet end of the inflation device communicates with the interior of the sampling tube through the positioning hole; A secondary telescopic device is provided at the top of the sampling tube. A connecting head is provided at the telescopic end of the secondary telescopic device. The connecting head is slidably connected to the through hole provided in the middle position of the inner wall of the positioning hole. The connecting head is provided with an electromagnet, and the power supply is controlled by the intelligent control center. The top of the limit protrusion is made of iron.

2. The automatic detection device for heavy metal content in contaminated soil according to claim 1, characterized in that: A crawler-type walking mechanism is provided at the bottom of the mobile body, a safety sensor is provided on the side wall of the mobile body, and a detection camera is provided on the top.

3. The automatic detection device for heavy metal content in contaminated soil according to claim 2, characterized in that: A spiral limiting groove is provided on the inner wall of the collecting tube.

4. The automatic detection device for heavy metal content in contaminated soil according to claim 3 is characterized by: A cleaning plate is provided at the bottom of the limiting protrusion. The cleaning plate is a circular plate structure and is slidingly connected to the inner wall of the collection tube. A magnet is provided on the edge of the upper surface of the cleaning plate, and the corresponding position on the top inner wall of the collection tube is set to iron to achieve magnetic fixation; the limiting protrusion and the cleaning plate are rotatably connected.

5. The automatic detection device for heavy metal content in contaminated soil according to claim 4, characterized in that: The inflatable device is located in the telescopic end of the secondary telescopic device, and the air outlet end of the inflatable device is connected to the connector of the tubular structure; the telescopic end of the secondary telescopic device is also a hollow tubular structure, and the inflatable device is located inside the hollow tubular structure. The side wall of the telescopic end of the secondary telescopic device is located above the position of the inflatable device and is provided with an air hole; The cleaning plate is hollow inside to form a cleaning cavity. A connecting hole is provided on the top of the limiting protrusion, which communicates with the cleaning cavity. Impact holes are evenly provided on the bottom edge of the cleaning plate, which communicate with the inside of the cleaning cavity.

6. The automatic detection device for heavy metal content in contaminated soil according to claim 5, characterized in that: A cleaning strip is arranged inside the impact hole. The cleaning strip is slidably connected to the impact hole, and the end of the cleaning strip is connected to the end of the impact hole through an elastic member.

7. The automatic detection device for heavy metal content in contaminated soil according to claim 6, characterized in that: The end of the cleaning strip is made of elastic material, and the limit groove extends downward to the bottom opening of the sampling tube; A cleaning hole is provided inside the cleaning strip, and the cleaning hole passes through the cleaning strip and extends to both side ends of the cleaning strip.

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