Soil detection sampling device

Abstract

The utility model belongs to the technical field of environmental monitoring, and particularly relates to a soil detection sampling device which comprises a sampling barrel, a bulldozing disc, a supporting rod, a handheld rod, a locking mechanism and a rotating pipe, according to the soil sampling device, the second strip-shaped groove and the first strip-shaped groove are staggered by rotating the rotating pipe, so that disturbance to sample soil during sampling is avoided, cross contamination of soil layers is not easy to occur, and the columnar to-be-sampled soil can be sampled for multiple times at different depths through the aligned second strip-shaped groove and first strip-shaped groove during sampling; the sampling efficiency is greatly improved, the sampling depth can be accurately adjusted, and the data reliability is guaranteed; the supporting rod is locked and fixed through the locking mechanism, so that the bulldozing disc can be driven to push the soil sample out of the sampling barrel, the cleaning efficiency is improved, an operator can conveniently collect the sample by holding the handheld rod, and the operation portability of the device is improved.

Description

Technical Field

[0001] This utility model belongs to the field of environmental monitoring technology, specifically relating to a soil testing and sampling device. Background Technology

[0002] Soil testing and sampling devices are key tools in environmental monitoring systems, playing an irreplaceable role in assessing soil pollution levels, analyzing nutrient distribution characteristics, and guiding agricultural production decisions. By acquiring representative soil samples, they can accurately detect key indicators such as heavy metal content, organic pollutant concentrations, and microbial activity, providing data support for ecological restoration planning and farmland quality protection. In contaminated site investigations, they directly impact the accuracy of pollution boundary delineation and risk assessment.

[0003] Layered sampling of soil at different depths can effectively reveal the vertical migration patterns of pollutants, water infiltration characteristics, and nutrient gradient distribution in the topsoil. For example, the top 0-30cm soil layer reflects the impact of tillage activities, the 30-60cm layer shows leaching and deposition characteristics, and the 60-90cm layer reflects the characteristics of the geological parent material. Accurately obtaining undisturbed samples from each independent soil layer has significant scientific value for studying pollutant diffusion mechanisms and developing layered remediation strategies.

[0004] However, existing soil testing and sampling devices are prone to cross-contamination of soil layers and insufficient depth control accuracy when performing stratified sampling. As a result, the test data cannot accurately reflect the true physicochemical properties of each soil layer, thus restricting the reliability of environmental assessment. In addition, there is also the problem of low sampling efficiency, which requires repeated operations and significantly increases the cost of manpower and materials. Utility Model Content

[0005] The purpose of this invention is to provide a soil testing and sampling device that solves the technical problems of easy cross-contamination of soil layers, insufficient depth control accuracy, and low sampling efficiency in the existing technology.

[0006] This utility model discloses a soil testing and sampling device, comprising:

[0007] The sampling tube is cylindrical, and has a first strip groove on both sides along its axis.

[0008] A bulldozer disc is placed inside the sampling tube and is adapted to the inner cavity of the sampling tube;

[0009] The support rod is arranged vertically, and its bottom end passes through the inner cavity of the sampling cylinder and connects to the bulldozer plate;

[0010] A handheld handle is arranged horizontally and positioned at the top of the support rod;

[0011] A locking mechanism, installed at the top of the sampling cylinder, can lock and fix the support rod to the sampling cylinder;

[0012] A rotating tube is rotatably sleeved outside the sampling cylinder, and a second strip groove is opened on both sides along its axial direction. The second strip groove is adapted to the first strip groove.

[0013] This application utilizes a rotating tube to create a misalignment between the second and first strip grooves. This avoids disturbing the soil sample during collection, minimizing cross-contamination between soil layers. Furthermore, the aligned second and first strip grooves allow for multiple samplings at different depths from the columnar soil sample, significantly improving sampling efficiency and enabling precise adjustment of sampling depth to ensure data reliability. Additionally, a locking mechanism secures the support rod, driving the bulldozer disc to push the soil sample out of the sampling tube, improving cleaning efficiency. This also facilitates sample collection by the operator holding the handheld rod, enhancing the device's portability.

[0014] Based on the above technical solution, the solution of this application can be further improved as follows:

[0015] Preferably, it includes:

[0016] The movable ring is slidably sleeved on the outside of the rotating tube;

[0017] Two conduits are inserted through both sides of the movable ring and correspond to the second strip groove;

[0018] Two scraper blades are respectively located on both sides of the bottom of the movable ring and are adapted to the second strip groove;

[0019] The locking component, installed on the outer circumference of the movable ring, can lock and fix the movable ring to the rotating tube. This solution greatly improves the sampling accuracy, avoids contamination of the sample by external soil, reduces errors caused by manual operation, ensures the reliability of the data, and is simple to operate, convenient to use, and easy to apply in practice.

[0020] Preferably, the locking component includes:

[0021] First knob;

[0022] A boss is provided on the outer periphery of the movable ring;

[0023] The first screw is threadedly connected to the boss, and one end is connected to the first knob, while the other end can be inserted into the movable ring and abut against the sampling cylinder. With this solution, the movable ring can be easily and simply locked and fixed. It is portable, easy to use, simple in structure, and has low production cost.

[0024] Preferably, it includes:

[0025] A stop ring is installed on the top of the bulldozer disc and sleeved on the support rod;

[0026] Two scraper blocks are positioned on both sides of the bulldozer disc and are adapted to the first strip groove. This solution can scrape and clean the soil in the first strip groove, improving the cleaning effect and avoiding the situation where residual soil interferes with the next sample.

[0027] Preferably, it includes:

[0028] The guide ring has a right-angled triangular cross-section and is fixedly sleeved outside the sampling cylinder, with its top surface fitting against the bottom surface of the rotating tube. This design can block the gap between the sampling cylinder and the rotating tube, thereby preventing soil from entering and ensuring the stability of the device during long-term use. The right-angled triangular cross-section can also reduce the resistance to insertion into the soil and reduce disturbance to the soil.

[0029] Preferably, the bottom end of the sampling tube has multiple serrations; this design improves the cutting ability of the sampling tube, can more evenly distribute the force during sampling, and avoids sample damage or uneven sampling caused by concentrated force.

[0030] Preferably, the outer circumference of the rotating tube is provided with scale lines on both sides of the second strip groove; by adopting this solution, the sampling position can be adjusted more precisely, avoiding positional errors, which helps to improve the accuracy and operability of sampling and ensure the reliability of soil test results.

[0031] Preferably, the upper and lower ends of the inner circumference of the rotating tube are respectively provided with limiting rings, and the upper and lower ends of the outer circumference of the sampling tube are provided with annular grooves that are adapted to the limiting rings. This solution plays a role in axial limiting, ensuring the stability of the axial position of the rotating tube and enhancing the structural strength. It also plays a role in guiding the circumferential rotation of the rotating tube and improving the smoothness of rotation.

[0032] Preferably, locking grooves are provided at both the upper and lower ends of the outer periphery of the support rod, and the locking mechanism includes:

[0033] Second knob;

[0034] A fixing sleeve is provided at the top of the sampling cylinder and slidably sleeved on the support rod;

[0035] The second screw is threadedly connected to the fixing sleeve, with one end connected to the second knob and the other end able to pass through the fixing sleeve and be inserted into the locking groove. This solution provides a stable and reliable fixing method, allowing the support rod to withstand higher forces after locking, ensuring structural stability, and has the advantages of simple structure, easy operation and low production cost.

[0036] Through the above technical solution, this utility model achieves the following beneficial effects:

[0037] This application utilizes a rotating tube to create a misalignment between the second and first strip grooves. This avoids disturbing the soil sample during collection, minimizing cross-contamination between soil layers. Furthermore, the aligned second and first strip grooves allow for multiple samplings at different depths from the columnar soil sample, significantly improving sampling efficiency and enabling precise adjustment of sampling depth to ensure data reliability. Additionally, a locking mechanism secures the support rod, driving the bulldozer disc to push the soil sample out of the sampling tube, improving cleaning efficiency. This also facilitates sample collection by the operator holding the handheld rod, enhancing the device's portability. Attached Figure Description

[0038] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 This is a front cross-sectional view of the soil testing and sampling device described in a specific embodiment of the present invention;

[0040] Figure 2 for Figure 1 A top-view cross-sectional view of point AA in the soil testing and sampling device shown;

[0041] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0042] Figure 4 for Figure 1 Enlarged view of point C in the middle;

[0043] Figure 5 for Figure 1 Enlarged view of point D in the middle;

[0044] Figure 6 for Figure 1 Side view of the soil testing and sampling device shown;

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. Sampling tube; 2. Bulldozer disc; 3. Support rod; 4. Hand handle; 5. Locking mechanism; 6. Rotary tube; 7. Movable ring; 8. Guide tube; 9. Scraper; 10. Locking assembly; 11. Stop ring; 12. Scraper block; 13. Flow guide ring;

[0047] 101. First groove; 102. Serrated edge; 103. Annular groove; 301. Locking groove; 501. Second knob; 502. Fixing sleeve; 503. Second screw; 601. Second groove; 602. Scale line; 603. Limiting ring; 1001. First knob; 1002. Boss; 1003. First screw. Detailed Implementation

[0048] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0049] First, it should be noted that some directional terms used in the following description to clearly illustrate the technical solution of this utility model, such as the terms "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," and "outer," are all derived from the normal orientation of the components in the soil testing and sampling device. They are only used to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features.

[0051] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] To better understand the above technical solutions, the following will provide a detailed description of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0053] Example:

[0054] like Figure 1As shown in the figure, this application discloses a soil testing and sampling device for stratified sampling of soil at different depths. Its specific structure includes: a sampling cylinder 1, a bulldozing disc 2, a support rod 3, a handheld rod 4, a locking mechanism 5, and a rotating tube 6.

[0055] The sampling tube 1 is cylindrical to avoid restricting the circumferential rotation of the rotating tube 6, and the first strip groove 101 is opened on both sides along its axis to facilitate the stratified sampling of the soil collected in the tube at different depths.

[0056] The bulldozing disc 2 is placed inside the sampling tube 1 and is adapted to the inner cavity of the sampling tube 1, so that the bulldozing disc 2 can fit tightly against the inner wall of the sampling tube 1, ensuring that the soil sample will not leak out from the gap between the sampling tube 1 and the bulldozing disc 2 during the sampling process. It is used to push the soil sample out of the sampling tube 1 after the sampling is completed, so as to facilitate cleaning.

[0057] The support rod 3 is arranged vertically, and its bottom end passes through the inner cavity of the sampling cylinder 1 and connects to the bulldozer plate 2, so that the operator can easily control the movement of the bulldozer plate 2.

[0058] The hand lever 4 is arranged horizontally and located at the top of the support rod 3 to provide the operator with a comfortable grip point for easy control and operation.

[0059] The locking mechanism 5 is installed at the top of the sampling cylinder 1, which can lock and fix the support rod 3 to the sampling cylinder 1, ensuring the relative position between the support rod 3 and the sampling cylinder 1 is stable.

[0060] The rotating tube 6 is rotatably sleeved on the outside of the sampling tube 1, thereby allowing the rotating tube 6 to rotate freely on the sampling tube 1 and adjust its position. A second strip groove 601 is provided on both sides along its axial direction. The second strip groove 601 is adapted to the first strip groove 101, so that when the rotating tube 6 rotates and the two are aligned, a sample can be taken through the sampling tube.

[0061] The working principle of the above technical solution is as follows:

[0062] First, by rotating the rotating tube 6, the second strip groove 601 and the first strip groove 101 are misaligned, thereby sealing the first strip groove 101 and avoiding disturbance to the soil layer during sampling.

[0063] Secondly, the operator holds the hand lever 4 and pulls the support rod 3 to move the bulldozer plate 2. When the bulldozer plate 2 moves to the top of the inner cavity of the sampling cylinder 1, the locking mechanism 5 locks and fixes the support rod 3 to the sampling cylinder 1.

[0064] Then, the operator places the sampling device vertically in the area to be sampled, and holds the hand handle 4 with both hands, so that the sampling device can be easily pushed down into the area to be sampled. After it is fully inserted, the sampling tube 1 can be pulled out of the soil by pulling the hand handle 4 upward. At this time, the sampling tube 1 contains columnar soil to be sampled.

[0065] Then, the rotating tube 6 is rotated again to align the second strip groove 601 with the first strip groove 101, thus exposing both sides of the columnar soil sample in the sampling tube 1 to the outside world. This process does not disturb the soil and ensures the accuracy of the sampling.

[0066] Next, the operator selects the sampling depth along the axis of the sampling tube 1, and then passes the sampling tube horizontally through the columnar soil to be sampled through the aligned second strip groove 601 and first strip groove 101 to complete the sampling; a single collection can be used to collect multiple samples at different depths.

[0067] Finally, after sampling is completed, the operator releases the lock between the support rod 3 and the sampling tube 1 through the locking mechanism 5, and then holds the hand rod 4 to push the bulldozer plate 2 through the support rod 3 to push the soil sample out of the sampling tube 1.

[0068] This invention, by rotating the rotating tube 6, causes the second strip groove 601 and the first strip groove 101 to be misaligned. This avoids disturbing the soil sample during collection, reducing the risk of cross-contamination between soil layers. Furthermore, by aligning the second strip groove 601 and the first strip groove 101, multiple samples can be taken from the columnar soil sample at different depths during sampling, significantly improving sampling efficiency and allowing for precise adjustment of sampling depth, thus ensuring data reliability. Additionally, the locking mechanism 5 secures the support rod 3, enabling the bulldozer disc 2 to push the soil sample out of the sampling tube 1, improving cleaning efficiency. It also facilitates sample collection by the operator holding the handheld rod 4, enhancing the device's portability.

[0069] In some embodiments, such as Figure 3 As shown, it includes: a movable ring 7, two guide tubes 8, two scrapers 9, and a locking assembly 10, specifically configured as follows:

[0070] The movable ring 7 is slidably sleeved on the outside of the rotating tube 6, and can rotate together with the rotating tube 6 and move freely along its axial direction;

[0071] Two conduits 8 are installed through both sides of the movable ring 7 and correspond to the second strip groove 601 to guide the sampling tube to move laterally and avoid deviation during sampling.

[0072] Two scraper blades 9 are located on both sides of the bottom of the movable ring 7 and are adapted to the second strip groove 601 to scrape out the soil remaining in the second strip groove 601 during collection;

[0073] The locking assembly 10 is installed on the outer periphery of the movable ring 7, which can lock and fix the movable ring 7 to the rotating tube 6, ensuring stability during sampling.

[0074] The working principle of the above technical solution is as follows:

[0075] During sample collection, the second groove 601 and the first groove 101 are aligned. The movable ring 7 is then moved to slide along the axial direction of the rotating tube 6, causing the guide tube 8 and scraper 9 to move together. The scraper 9 then scrapes out the soil from the second groove 601, preventing it from interfering with the sample. When the guide tube 8 is aligned with the desired sampling depth of the columnar soil sample, the movable ring 7 and the rotating tube 6 are locked in place by the locking assembly 10. The sampling tube is then inserted into one guide tube 8, passes laterally through the columnar soil sample, and exits from the other guide tube 8, thus completing one sampling operation.

[0076] The above settings significantly improve sampling accuracy, prevent external soil contamination of samples, reduce errors caused by manual operation, ensure data reliability, and are simple to operate, easy to use, and convenient for practical applications.

[0077] Based on the above embodiments, such as Figure 2 As shown, the locking assembly 10 includes: a first knob 1001, a boss 1002, and a first screw 1003, and its specific configuration is as follows:

[0078] The first knob 1001 is convenient for manual adjustment by the operator;

[0079] The boss 1002 is located on the outer periphery of the movable ring 7, which enhances the structural stability;

[0080] The first screw 1003 is threadedly connected to the boss 1002, and one end is connected to the first knob 1001, while the other end can be inserted into the movable ring 7 and abut against the sampling cylinder 1.

[0081] When locking, the operator turns the first knob 1001 to drive the first screw 1003 to rotate, so that it extends into the movable ring 7 and abuts against the sampling cylinder 1, thereby completing the locking and fixing.

[0082] Through the above-described further design of the locking component 10, the locking and fixing of the movable ring 7 can be easily and simply accomplished. It is portable, easy to use, simple in structure, and low in production cost.

[0083] In some embodiments, such as Figures 1-3As shown, it includes: a stop ring 11 and two scraper blocks 12, which are specifically configured as follows:

[0084] The stop ring 11 is installed on the top of the bulldozer disc 2 and sleeved on the support rod 3 to limit the upward stroke of the bulldozer disc 2 and prevent the scraper block 12 from colliding with the first strip groove 101.

[0085] Two scraper blocks 12 are located on both sides of the bulldozer plate 2 and are adapted to the first strip groove 101 to scrape out and clean the soil in the first strip groove 101.

[0086] With the above settings, the soil in the first strip groove 101 can be scraped and cleaned, improving the cleaning effect and avoiding the situation where residual soil interferes with the next sample.

[0087] In some embodiments, such as Figure 1 and Figure 4 As shown, it includes: a guide ring 13, the cross-section of which is a right triangle, and a fixing sleeve 502 is provided outside the sampling cylinder 1, with its top surface attached to the bottom surface of the rotating tube 6.

[0088] By setting the guide ring 13, the gap between the sampling tube 1 and the rotating tube 6 can be blocked, thereby preventing soil from entering and ensuring the stability of the device during long-term use. In addition, the cross-section is a right triangle, which can reduce the resistance to insertion into the soil and reduce the disturbance to the soil.

[0089] In some embodiments, such as Figure 4 and Figure 6 As shown, the bottom end of the sampling cylinder 1 has multiple serrations 102.

[0090] By setting the serrations 102, the cutting ability of the sampling tube 1 is improved, which can more evenly distribute the force during sampling and avoid sample damage or uneven sampling caused by concentrated force.

[0091] In some embodiments, such as Figure 4 and Figure 6 As shown, the outer circumference of the rotating tube 6 is provided with scale lines 602 on both sides of the second strip groove 601.

[0092] By setting the scale line 602, operators can adjust the sampling position more precisely, avoiding positional errors and improving the accuracy and operability of sampling, thus ensuring the reliability of soil test results.

[0093] In some embodiments, such as Figure 1 , Figure 3 and Figure 4As shown, the upper and lower ends of the inner circumference of the rotating tube 6 are respectively provided with limiting rings 603, and the upper and lower ends of the outer circumference of the sampling tube 1 are provided with annular grooves 103 that are adapted to the limiting rings 603.

[0094] By setting the mutually cooperating limiting ring 603 and annular groove 103, the rotating tube 6 is axially limited, preventing it from falling off the sampling cylinder 1, ensuring the stability of the axial position of the rotating tube 6, enhancing the structural strength, and also guiding the circumferential rotation of the rotating tube 6, thus improving the smoothness of rotation.

[0095] In some embodiments, such as Figure 1 , Figure 3 and Figure 4 As shown, locking grooves 301 are provided at both the upper and lower ends of the outer periphery of the support rod 3; the locking mechanism 5 includes: a second knob 501, a fixing sleeve 502, and a second screw 503, specifically configured as follows:

[0096] The second knob 501 is easy for the operator to hold and rotate, ensuring simple and quick operation;

[0097] The fixed sleeve 502 is located at the top of the sampling cylinder 1 and is slidably sleeved on the support rod 3, which provides a stable platform for installing and supporting the second screw 503;

[0098] The second screw 503 is threadedly connected to the fixed sleeve 502, and one end is connected to the second knob 501, while the other end can be inserted into the fixed sleeve 502 and plugged into the locking groove 301.

[0099] It should be noted that the locking groove 301 is located at the lower end of the outer periphery of the support rod 3, which facilitates locking and fixing the support rod 3 during sampling, so that the operator can push the sampling tube 1 into the soil through the support rod 3; the locking groove 301 is located at the upper end of the outer periphery of the support rod 3, which facilitates pushing the support rod 3 into the sampling tube 1 and locking and fixing it when the device is stored, thereby preventing it from moving around freely.

[0100] When not tightened, the operator first loosens the second knob 501, causing the second screw 503 to exit from the locking groove 301. At this time, the support rod 3 can move freely axially. When tightening is required, the second knob 501 is rotated, causing the second screw 503 to extend into the threaded through hole in the fixing sleeve 502 until its end is inserted into the locking groove 301 on the support rod 3.

[0101] By setting the locking groove 301 and further designing the locking mechanism 5, a stable and reliable fixing method is provided, which enables the support rod 3 to withstand higher forces after locking and fixing, ensuring structural stability, and has the advantages of simple structure, easy operation and low production cost.

[0102] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0103] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A soil testing sampling device, characterized by, The utility model relates to a soil sampling device, which comprises: a sampling cylinder in the shape of a cylinder and provided with a first slot along its axial direction on both sides; a bulldozing disc arranged in the sampling cylinder and matched with the inner cavity of the sampling cylinder; a supporting rod arranged vertically and having a bottom end penetrating into the inner cavity of the sampling cylinder and connected with the bulldozing disc; a handheld rod arranged transversely and arranged at the top end of the supporting rod; a locking mechanism mounted at the top end of the sampling cylinder and capable of locking and fixing the supporting rod and the sampling cylinder; a rotating tube rotatably sleeved outside the sampling cylinder and provided with a second slot along its axial direction on both sides, the second slot being matched with the first slot.

2. The soil testing sampling device of claim 1, wherein, The utility model relates to a soil sampling device, which comprises: a movable ring slidably sleeved outside the rotating tube; two guide tubes arranged through the movable ring on both sides and matched with the second slot; two scraping blades arranged on both sides of the bottom of the movable ring and matched with the second slot; a locking assembly mounted on the outer periphery of the movable ring and capable of locking and fixing the movable ring and the rotating tube.

3. The soil testing sampling device of claim 2, wherein, The locking assembly comprises: a first knob; a boss arranged on the outer periphery of the movable ring; a first screw rod threadedly connected with the boss, one end of which is connected with the first knob and the other end of which is capable of penetrating into the movable ring and abutting against the sampling cylinder.

4. The soil testing sampling device of claim 1, wherein, The utility model relates to a soil sampling device, which comprises: a stop ring mounted at the top end of the bulldozing disc and sleeved on the supporting rod; two scraping blocks arranged on both sides of the bulldozing disc and matched with the first slot.

5. The soil testing sampling device of claim 1, wherein, The utility model relates to a soil sampling device, which comprises: a flow guide ring in the shape of a right-angled triangle and fixedly sleeved outside the sampling cylinder and arranged with its top surface abutting against the bottom surface of the rotating tube.

6. The soil testing sampling device of claim 1, wherein, The bottom end of the sampling cylinder is formed with a plurality of sawteeth.

7. The soil testing sampling device of claim 1, wherein, The outer periphery of the rotating tube is provided with scale lines on both sides of the second slot.

8. The soil testing sampling device of claim 1, wherein, The upper and lower ends of the inner periphery of the rotating tube are respectively provided with stop rings, and the outer periphery of the sampling cylinder is provided with annular grooves matched with the stop rings on the upper and lower ends.

9. The soil testing sampling device of claim 1, wherein, The outer periphery of the supporting rod is provided with locking grooves on the upper and lower ends, and the locking mechanism comprises: a second knob; a fixed sleeve arranged at the top end of the sampling cylinder and slidably sleeved on the supporting rod; a second screw rod threadedly connected with the fixed sleeve, one end of which is connected with the second knob and the other end of which is capable of penetrating into the fixed sleeve and being inserted into the locking groove.

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