A sampling device and method for regionalized soil quality analysis

Abstract

The application relates to the technical field of soil quality analysis sampling, and discloses a sampling device and method for regional soil quality analysis, wherein the device comprises a support frame, a sampling cylinder is mounted on the inner side of the support frame, a roller is mounted at the bottom end of the support frame, the roller is used for transferring the position of the sampling cylinder, a sampling assembly is arranged on the surface of the support frame, the sampling assembly comprises a sliding groove, the sampling cylinder is embedded in the sliding groove, and the sampling cylinder and the sliding groove are longitudinally and slidably connected. The sampling device and method for regional soil quality analysis can form a symmetrical and uniform support structure through five groups of pressure rods and inserts in the stabilizing assembly, effectively offset the lateral resistance of soil, avoid shaking of the sampling cylinder caused by force deviation when the sampling cylinder is embedded, prevent the adobe sample from being deformed by extrusion from the source, and guarantee the integrity of the physical structure of the soil; further, the detection error is reduced, and the reliability and repeatability of the regional soil quality analysis result are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of soil quality analysis sampling technology, and in particular to a sampling device and method for regional soil quality analysis. Background Technology

[0002] Soil sampling devices are core tools for conducting soil physicochemical property testing, regional soil quality analysis, farmland fertility assessment, and ecological environment surveys. Their performance directly determines the integrity and representativeness of soil samples, thus affecting the accuracy of subsequent analytical data. Currently, the mainstream manual soil sampling devices are mainly of the press-type structure, covering types such as ring samplers, integrated soil drills, and stratified samplers, and are widely used in soil collection in agricultural farmland, mining areas, and ecologically sensitive areas.

[0003] However, existing manual pressing-type soil sampling devices have significant technical shortcomings in practical applications, making it difficult to meet the needs of high-precision soil sampling and profile analysis. On the one hand, the sampling process of the device relies entirely on the vertical downward pressure applied by the operator's hand. If there is a slight deviation in the direction of the force applied by the hand during operation, the sampling component is prone to lateral shaking. This shaking will cause lateral compression of the soil sample. On the other hand, existing pressing-type devices lack effective stratification and cutting structures, and the collected soil samples are mostly in whole blocks, making it impossible to achieve accurate division of the soil profile during the sampling process. When conducting vertical heterogeneity analysis of the soil profile later, additional manual division of the soil sample is required, which not only easily causes secondary disturbance to the soil sample, but also makes it difficult to ensure the accuracy of stratification, seriously affecting the reliability of the detection results of profile-related indicators. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing technology has the disadvantage of causing soil compression due to shaking during sampling. To this end, we propose a sampling device and method for regional soil quality analysis.

[0005] To achieve the above objectives, this application adopts the following technical solution: a sampling device for regional soil quality analysis, including a support frame, a sampling cylinder installed on the inner side of the support frame, a roller installed at the bottom end of the support frame, the roller being used to move the position of the sampling cylinder, a sampling component being provided on the surface of the support frame, the sampling component including a groove, a sampling cylinder being embedded inside the groove, the sampling cylinder and the groove being longitudinally slidably connected, pressure handles being installed on both sides of the sampling cylinder, and a sampling pad being embedded at the bottom end of the sampling cylinder;

[0006] The sampling tube has a stabilizing component embedded inside. The stabilizing component includes an isolation plate, a pressure rod is embedded inside the isolation plate, a limit groove is formed on the surface of the pressure rod, a limit rod is embedded inside the limit groove, an insert is connected to the bottom end of the pressure rod, the bottom end of the insert penetrates the interior of the sampling pad, and an operating rod is connected to the top end of the pressure rod.

[0007] Preferably, the bottom end of the sampling pad is provided with a scraping groove, which initially adheres to the soil being sampled.

[0008] Preferably, the spacer has five pressure bars embedded inside, and the bottom end of each pressure bar corresponds to one of the five inserts.

[0009] Preferably, each of the pressure bars and inserts is evenly distributed on the isolation plate, and each pressure bar and insert is parallel to the others, wherein the pressure bars and inserts are sheet-like structures made of stainless steel.

[0010] Preferably, the two ends of the limiting rod are fixedly connected to the inner wall of the sampling cylinder, the limiting rod passes through the interior of the five pressure rods, and the limiting rod and the pressure rods are slidably connected.

[0011] Preferably, the bottom end of the insert is connected to a sub-slice, and a notch is provided at the connection between the insert and the sub-slice.

[0012] Preferably, a notch is provided between each insert and the segment, and the opening of each notch faces the same direction. The opening of the notch is inclined upward and distributed on one side of the insert.

[0013] Preferably, the insert, notch, and slit penetrate the scraping groove on the surface of the sampling pad, and the scraping groove and the insert are positioned correspondingly.

[0014] A method for a sampling device for regionalized soil quality analysis, characterized by comprising the following steps:

[0015] S1: Device transfer and initial positioning: The sampling device is transferred to the predetermined sampling site by the rolling characteristics of the rollers. Then, the sampling tube is placed vertically on the surface of the soil to be sampled, so that the scraping groove at the bottom of the sampling pad is in contact with the soil surface.

[0016] S2: Sequential embedding of inserts: The operating lever drives the matching pressure bar downward along the inner cavity of the isolation plate, and the pressure bar simultaneously drives the insert to slide directionally along the inner channel of the scraping groove; the five pressure bars and the middle set of inserts are prioritized to complete soil insertion, then the five pressure bars and the two outermost sets of inserts are driven sequentially to complete soil insertion, and finally the five pressure bars and the two next outermost sets of inserts are driven to complete soil insertion. After all five inserts are fully embedded in the soil, a stable support structure for the sampling tube is formed.

[0017] S3: Sampling tube embedding: The staff applies downward pressure to the handle with their feet. With the help of the force transmission of the handle, the sampling tube moves downward in the vertical direction. Under the guidance and support of the five inserts, the sampling tube is stably embedded in the soil. As the sampling tube is embedded deeper into the soil, the soil surface is squeezed and generates an upward reaction force, which drives the sampling pad to move upward along the inner wall of the sampling tube.

[0018] S4: Sampling complete: When the sampling pad moves to the top of the sampling tube and comes into contact with the isolation plate, the soil sampling embedding operation is completed.

[0019] Preferably, the post-sampling processing steps include pulling the sampling tube upward from the soil, during which soil is introduced into the internal space of the notch, and the notch is locally bent and deformed under the action of soil resistance. The bending of the notch simultaneously causes the segmented pieces to tilt, and the tilting of the segmented pieces limits the sampling soil in the sampling tube, preventing the sampling soil from falling off the sampling tube.

[0020] After the sampling tube is completely removed, continue to apply downward pressure to the operating rod, so that the operating rod drives the limiting groove and the insert to move down synchronously. After the limiting groove and the insert are in place, the insert is gradually moved out of the sampling tube. The sampled soil adheres to the surface of the insert under the action of friction and is removed from the sampling tube synchronously with the movement of the insert.

[0021] By using the cutting action of the insert, the original cylindrical adobe sample is cut into multiple sheet-like structures. Each sheet-like sample corresponds to a fixed soil depth range, which is used for subsequent analysis and detection of the vertical heterogeneity of soil physicochemical properties and biological attributes at different depths.

[0022] The technical effects and advantages of this invention are as follows:

[0023] In this invention, the five sets of pressure bars and inserts in the stabilizing component form a symmetrical and uniform support structure, effectively counteracting the lateral resistance of the soil and preventing shaking caused by force deviation when the sampling tube is embedded. This prevents the soil sample from being squeezed and deformed from the source, ensuring the integrity of the soil's physical structure. Secondly, the inserts penetrate the sampling pad and simultaneously achieve a cutting function, which can directly cut the cylindrical soil sheet into sheet samples corresponding to fixed depth intervals. This accurately preserves the vertical stratification characteristics of the soil profile, completely avoiding the interlayer mixing problem of traditional block sample manual segmentation, further reducing detection errors, and ensuring the reliability and repeatability of regional soil quality analysis results. Attached Figure Description

[0024] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts:

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a schematic diagram of the sampling pad and scraping groove of the present invention;

[0027] Figure 3 This is a schematic cross-sectional view of the sampling cylinder of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the limiting rod and limiting groove of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the separator and insert of the present invention;

[0030] Figure 6 This is a schematic diagram of the insert and notched structure of the present invention;

[0031] Figure 7 This is a schematic cross-sectional view of the extended slices of the present invention.

[0032] Legend: 11. Support frame; 12. Sampling cylinder; 13. Roller; 2. Sampling assembly; 21. Slide groove; 22. Pressure handle; 23. Sampling pad; 24. Scraping groove; 3. Stabilizing assembly; 31. Limiting rod; 32. Pressure rod; 33. Limiting groove; 34. Isolation plate; 35. Insert plate; 36. Notch; 37. Dividing plate; 38. Operating rod. Detailed Implementation

[0033] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0034] Reference Figures 1-7 As shown, the present invention provides a technical solution: a sampling device for regional soil quality analysis. The device mainly consists of a support frame 11, a sampling cylinder 12, and rollers 13. The sampling cylinder 12 is installed on the inner side of the support frame 11, and is the core component of the entire device, responsible for directly contacting the soil and collecting samples. Furthermore, rollers 13 are installed at the bottom of the support frame 11. The main function of the rollers 13 is to flexibly move the sampling cylinder 12, greatly improving the efficiency and ease of operation for the operator during sampling. Especially during the transfer of the sampling device, the operator can easily drag the sampling device, utilizing the rolling characteristics of the rollers 13, making the entire transfer operation easy and efficient.

[0035] Once the sampling device is successfully transferred to the designated sampling site, the operator can manually or mechanically press the sampling tube 12 into the soil to carry out precise and effective soil sampling. The soil samples collected in this way, after subsequent scientific analysis and testing, can be used as important data support for regional soil quality analysis, providing a scientific basis for soil improvement, agricultural planting, and other purposes.

[0036] The surface of the support frame 11 is provided with a sampling component 2. The sampling component 2 includes a chute 21. A sampling cylinder 12 is embedded inside the chute 21. The sampling cylinder 12 and the chute 21 are longitudinally slidably connected. Pressure handles 22 are installed on both sides of the sampling cylinder 12. A sampling pad 23 is embedded at the bottom of the sampling cylinder 12. A scraping groove 24 is provided at the bottom of the sampling pad 23. In the initial stage, the scraping groove 24 is attached to the sampling soil.

[0037] The sampling cylinder 12 has a stabilizing component 3 embedded inside. The stabilizing component 3 includes an isolation plate 34, and a pressure rod 32 is embedded inside the isolation plate 34. Five pressure rods 32 are embedded inside the isolation plate 34, and the bottom end of each pressure rod 32 corresponds to one of the five inserts 35. Each pressure rod 32 and insert 35 is evenly distributed on the isolation plate 34 and is parallel to each other. The pressure rods 32 and inserts 35 are sheet-like structures made of stainless steel. A limiting groove 33 is formed on the surface of the pressure rod 32, and a limiting rod 31 is embedded inside the limiting groove 33. The bottom end of the pressure rod 32 is connected to the insert 35, and the bottom end of the insert 35 penetrates the interior of the sampling pad 23. The top end of the pressure rod 32 is connected to an operating rod 38.

[0038] The two ends of the limiting rod 31 are fixedly connected to the inner wall of the sampling cylinder 12. The limiting rod 31 passes through the interior of the five pressure rods 32. The limiting rod 31 and the pressure rods 32 are slidably connected. The bottom end of the insert 35 is connected to the dividing slice 37. A notch 36 is provided at the connection between the insert 35 and the dividing slice 37. A notch 36 is provided between each insert 35 and the dividing slice 37. The opening of each notch 36 faces the same direction. The opening of the notch 36 is inclined upward and distributed on one side of the insert 35.

[0039] The insert 35, notch 36, and slicing 37 penetrate the scraping groove 24 opened on the surface of the sampling pad 23, and the scraping groove 24 and the insert 35 are positioned correspondingly.

[0040] In the initial stage of soil sampling, the sampling tube 12 is placed vertically on the surface of the soil to be sampled, with the sampling pad 23 and scraping groove 24 integrated at the bottom of the sampling tube 12. At this time, by operating the operating rod 38, the matching pressure rod 32 can be driven downwards in a preset direction; during the downward movement of the pressure rod 32, the insert 35 is simultaneously moved downwards. During this process, the pressure rod 32 slides stably along the internal cavity of the insulating plate 34, while the insert 35 penetrates the internal channel of the scraping groove 24 and maintains directional sliding along this channel. Continuously applying downward pressure to the pressure rod 32 can push the insert 35 to gradually embed itself into the soil.

[0041] It should be noted that there are five pressure rods 32 and five inserts 35. During the process of embedding the five sets of pressure rods 32 and inserts 35 into the soil, the set of pressure rods 32 and inserts 35 located in the middle position will complete the soil insertion action first. After the inserts 35 are successfully embedded in the soil, they provide a stable supporting force for the sampling tube 12. With the help of this pre-established stable structure, the verticality of the sampling tube 12 when it is embedded in the soil can be effectively guaranteed, and the lateral compression of the soil sample caused by the shaking of the sampling tube 12 can be avoided, thus ensuring the physical structural integrity of the soil sample.

[0042] In the process of embedding insert 35, a key step is determining the insertion sequence to optimize overall stability. The specific sequence is as follows: first, insert the central insert 35 into the soil to establish a core support point; second, process the two outermost inserts to fix the boundaries; and finally, place the two inserts closest to the center. From a mechanical balance perspective, this arrangement effectively counteracts the lateral resistance of the soil, preventing the support frame from tilting due to uneven force distribution when other components are subsequently inserted. Simultaneously, by positioning the outermost insert, the embedding range of the sampling tube 12 can be predetermined, ensuring that the sampling tube 12 always remains in the central area of ​​the support structure, significantly reducing the risk of displacement during embedding, thereby improving sampling accuracy and equipment lifespan. Furthermore, this sequence helps maintain a uniform stress distribution on the frame when soil resistance changes, avoiding deformation problems caused by localized stress concentration.

[0043] After the initial embedding of the intermediate insert 35, this step aims to establish an initial support point, ensuring a stable foundation for subsequent operations. Then, by precisely adjusting the sliding position of the operating rod 38, the remaining four sets of inserts 35 are sequentially driven into the soil, with each set enhancing the overall structural stability. Once all five inserts 35 are fully embedded in the soil and form a stable support structure, the support frame provides reliable guidance for subsequent operations. At this point, the soil embedding operation of the sampling tube 12 is initiated, which must be performed in a stable environment. Because the contact area between the sampling tube 12 and the soil is large during the cutting process, the resulting frictional resistance increases accordingly, potentially hindering embedding. Therefore, a greater force is required to ensure successful embedding and avoid affecting sampling accuracy due to excessive resistance. To reduce operational difficulty and improve force application efficiency, workers can apply continuous and uniform downward pressure to the pressure handle 22 using their feet. The design of the pressure handle 22 optimizes the force transmission path. With the force transmission effect of the pressure handle 22, the pressure is efficiently converted into kinetic energy to drive the sampling cylinder 12 to move vertically downward. Based on the stable guidance and support provided by the five inserts 35, the sampling cylinder 12 can be smoothly embedded in the soil, reducing the risk of displacement or shaking. As the sampling cylinder 12 continues to embed deeper into the soil, when the cylinder cuts through the soil layer, the soil surface is compressed, generating an upward reaction force. This force is transmitted through an internal mechanism, causing the sampling pad 23 to move upward along the inner wall of the sampling cylinder 12. The upward process of the sampling pad 23 gradually compresses and accommodates the soil sample. When the sampling pad 23 moves to the top position of the sampling cylinder 12 and makes contact with the isolation plate 34, the soil sampling operation is completed, ensuring the integrity of the sample and facilitating subsequent extraction.

[0044] The sampling tube 12 is then pulled upward from the soil. During the upward pulling process, the soil will be introduced into the internal space of the notch 36. Under the resistance of the soil, the notch 36 will locally bend and deform. The bending action of the notch 36 will simultaneously cause the slice 37 to tilt. The tilting state of the slice 37 can limit the sampling soil and effectively prevent the sampling soil from breaking away from the constraint of the sampling tube 12 and falling out of the sampling tube 12.

[0045] After the sampling tube 12 is completely removed, continue to apply downward pressure to the operating rod 38, causing the operating rod 38 to drive the limiting groove 33 and the insert 35 to descend synchronously. After the limiting groove 33 and the insert 35 have descended to their positions, the insert 35 gradually moves out of the sampling tube 12. At this time, the sampled soil adheres to the surface of the insert 35 under the action of friction, and detaches from the sampling tube 12 synchronously with the removal of the insert 35. This method can significantly improve the convenience of subsequent processing of the sampled specimens.

[0046] Furthermore, with the help of the cutting action of the insert 35, the original cylindrical soil sample can be cut into multiple sheet-like structures. In subsequent detection and analysis, the sheet-like samples can accurately preserve the vertical stratification characteristics of the soil profile. Each sample corresponds to a fixed soil depth range and can be directly used to analyze the vertical heterogeneity of the physicochemical and biological properties of soils at different depths. This effectively avoids the interlayer mixing problem that is easy to occur when manually dividing traditional block samples. It provides more accurate stratified data support for research directions such as nutrient distribution in the cultivated layer and sub-cultivated layer and the migration pattern of deep pollution in regional soil quality analysis.

[0047] Secondly, sheet-like samples have a better surface area to volume ratio, resulting in more uniform heating and more consistent moisture loss during pretreatment. This reduces pretreatment errors caused by differences in sample morphology. When conducting microscopic index detection, sheet-like samples provide a flatter and more uniform detection surface, facilitating accurate sampling and observation by the instrument. At the same time, the weight of a single sample is controllable and can be used as needed, avoiding secondary disturbances caused by repeated weighing of traditional block samples, further ensuring the reliability and repeatability of the test results.

[0048] A method for a sampling device for regionalized soil quality analysis, characterized by comprising the following steps:

[0049] S1: Device transfer and initial positioning: The sampling device is transferred to the predetermined sampling site by the rolling characteristics of the roller 13. Then the sampling tube 12 is placed vertically on the soil surface to be sampled, so that the scraping groove 24 at the bottom of the sampling pad 23 fits the soil surface.

[0050] S2: Sequential embedding of inserts 35: The operating lever 38 drives the matching pressure rod 32 downward along the internal cavity of the isolation plate 34. The pressure rod 32 simultaneously drives the inserts 35 to slide directionally along the internal channel of the scraping groove 24. The middle group of the five pressure rods 32 and inserts 35 is prioritized to complete soil insertion. Then, the two outermost groups of the five pressure rods 32 and inserts 35 are driven to complete soil insertion in sequence. Finally, the two next outermost groups of the five pressure rods 32 and inserts 35 are driven to complete soil insertion. After all five inserts 35 are fully embedded in the soil, a stable support structure for the sampling tube 12 is formed.

[0051] S3: Sampling of the sampling cylinder 12: The staff applies downward pressure to the pressure handle 22 with their feet. With the force transmission of the pressure handle 22, the sampling cylinder 12 is driven to move downward in the vertical direction. Under the guidance and support of the five inserts 35, the sampling cylinder 12 is stably embedded in the soil. As the sampling cylinder 12 is embedded deeper into the soil, the soil surface is squeezed and generates an upward reaction force, which drives the sampling pad 23 to move upward along the inner wall of the sampling cylinder 12.

[0052] S4: Sampling complete: When the sampling pad 23 moves to the top position of the sampling tube 12 and comes into contact with the isolation plate 34, the soil sampling embedding operation is completed.

[0053] The post-sampling processing steps include pulling the sampling tube 12 upward from the soil. During the pulling process, the soil is introduced into the internal space of the notch 36. Under the action of the soil, the notch 36 is locally bent and deformed. The bending of the notch 36 simultaneously drives the segment 37 to tilt. The tilting of the segment 37 limits the sampling soil in the sampling tube 12, preventing the sampling soil from falling off the constraint of the sampling tube 12.

[0054] After the sampling tube 12 is completely removed, continue to apply downward pressure to the operating rod 38, so that the operating rod 38 drives the limiting groove 33 and the insert 35 to move down synchronously. After the limiting groove 33 and the insert 35 have moved down to their positions, the insert 35 gradually moves out of the sampling tube 12. The sampled soil adheres to the surface of the insert 35 under the action of friction and moves out of the sampling tube 12 synchronously with the movement of the insert 35.

[0055] By using the cutting action of insert 35, the original cylindrical adobe sample is cut into multiple sheet-like structures. Each sheet-like sample corresponds to a fixed soil depth range, which is used for subsequent analysis and detection of the vertical heterogeneity of soil physicochemical properties and biological attributes at different depths.

[0056] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A sampling device for regionalized soil quality analysis, characterized in that, The utility model provides a soil sampling device, including support frame, the inside installation of sampling cylinder of support frame, the bottom installation of support frame gyro wheel, gyro wheel is used for the position of sampling cylinder is transferred, the surface of support frame is equipped with sampling assembly, sampling assembly includes sliding slot, the inside embedding of sliding slot is equipped with sampling cylinder, sampling cylinder and sliding slot between longitudinal sliding connection, the both sides of sampling cylinder are equipped with pressure handle, the bottom embedding of sampling cylinder is equipped with sampling pad, The inside embedding of sampling cylinder is equipped with stabilizing assembly, the inside embedding of isolating sheet is equipped with pressure rod of stabilizing assembly, the surface of pressure rod is equipped with limiting slot, the inside embedding of limiting slot is equipped with limiting rod, the bottom of pressure rod is connected with insert piece, the inside of sampling pad is passed through the bottom of insert piece, the top of pressure rod is connected with operating rod.

2. The sampling device for regionalized soil quality analysis of claim 1, wherein: The bottom of sampling pad is equipped with scraping groove, scraping groove is pasted on sampling soil in initial stage.

3. The sampling device for regionalized soil quality analysis of claim 1, wherein: The inside embedding of isolating sheet is equipped with five pressure rods, and the bottom of the pressure rod corresponds to five insert pieces.

4. The sampling device for regionalized soil quality analysis according to claim 3, characterized in that, Each pressure rod and insert piece is uniformly distributed on the isolating sheet, and each pressure rod and insert piece is parallel, wherein the pressure rod and insert piece are made of sheet structure of stainless steel.

5. The sampling device for regionalized soil quality analysis of claim 1, wherein: The both ends of the limiting rod are fixedly connected to the inner wall of the sampling cylinder, the limiting rod penetrates the inside of the five pressure rods, and the limiting rod and the pressure rod are in sliding connection.

6. The sampling device for regionalized soil quality analysis of claim 1, wherein: The bottom of the insert piece is connected with a split piece, and a notch is formed at the connection between the insert piece and the split piece.

7. The sampling device for regionalized soil quality analysis of claim 6, wherein: Each insert piece and split piece is provided with a notch, and the openings of each notch are consistent. The openings of the notches are inclined upward and distributed on one side of the insert piece.

8. The sampling device for regionalized soil quality analysis of claim 1, wherein: The insert piece, notch and split piece penetrate the scraping groove formed on the surface of the sampling pad, and the positions of the scraping groove and the insert piece correspond to each other.

9. The method of claim 1-8, wherein: The steps include: S1: device transfer and initial positioning: the sampling device is transferred to the predetermined sampling site by the rolling characteristics of the gyro wheel, and then the sampling cylinder is vertically placed on the surface of the soil to be sampled, so that the scraping groove at the bottom of the sampling pad is attached to the soil surface; S2: sequential embedding of insert pieces: operate the operating rod to drive the corresponding pressure rods to move downward along the inner cavity of the isolating sheet, and the pressure rods simultaneously drive the insert pieces to slide along the inner channel of the scraping groove; First, make the middle group of five pressure rods and insert pieces complete soil insertion, then sequentially drive the outermost two groups of five pressure rods and insert pieces to complete soil insertion, and finally drive the next outermost two groups of five pressure rods and insert pieces to complete soil insertion. After the five insert pieces are completely embedded in the soil, a stable support structure for the sampling cylinder is formed; S3: embedding sampling of the sampling cylinder: the operator applies downward pressure to the pressure handle through the feet, and the sampling cylinder moves downward in the vertical direction by the force transmission of the pressure handle. Under the guidance and support of the five insert pieces, the sampling cylinder is stably embedded in the soil. As the sampling cylinder is embedded into the deep layer of the soil, the surface layer of the soil is extruded to generate an upward reaction force, which drives the sampling pad to move upward along the inner wall of the sampling cylinder; S4: sampling is completed: when the sampling pad moves to the top of the sampling cylinder and contacts the isolating sheet, the embedding operation of soil sampling is completed.

10. The method of claim 9, wherein: The post-sampling processing step includes pulling the sampling cylinder upward from the soil, guiding the soil into the internal space of the notch during the pulling process, bending and deforming the notch locally under the resistance of the soil, synchronously driving the cutting piece to tilt by the bending of the notch, limiting the sampling soil in the sampling cylinder by the tilt of the cutting piece, and preventing the sampling soil from falling off from the sampling cylinder; After the sampling cylinder is completely pulled out, continue to apply downward pressure to the operating rod, drive the limiting groove and the insert piece to move downward synchronously, and after the limiting groove and the insert piece move downward to the position, the insert piece is gradually removed from the inside of the sampling cylinder, the sampling soil adheres to the surface of the insert piece under the action of friction, and is synchronously separated from the sampling cylinder along with the removal action of the insert piece; By means of the cutting action of the insert piece, the originally cylindrical soil sample is cut into a plurality of sheet structures, each sheet structure corresponds to a fixed soil depth interval, and is used for subsequent analysis and detection of vertical heterogeneity of physical and chemical properties and biological attributes of soil at different depths.

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