A soil in-situ sampling device suitable for various geomorphic conditions

Abstract

This invention discloses an in-situ soil sampling device suitable for various terrain conditions, relating to the field of soil sampling technology. It includes a sampling mounting component with a moisture-retaining sealing component on its outer side. A stop control component is installed on the moisture-retaining sealing component to prevent sample failure. An overpressure protection component is installed on the sampling mounting component, connected in series with the sampling mounting component and the stop control component. The stop control component facilitates sealing and moisturizing after sampling, preventing moisture loss and ensuring subsequent testing accuracy. Simultaneously, the moisture-retaining sealing component, in conjunction with the stop control component, automatically limits the time required for rapid sealing and moisturizing after soil sampling; otherwise, the protective cover cannot be installed on the sampling connection ring for sealing. This addresses the problem that current in-situ soil sampling devices for various terrain conditions are inconvenient for standardizing sample sealing and moisturizing time and cannot prevent excessive sample compression.

Description

Technical Field

[0001] This invention relates to the field of soil sampling technology, specifically to an in-situ soil sampling device suitable for various geomorphic conditions. Background Technology

[0002] In actual soil backfilling projects, various soil topography scenarios are involved. In the actual backfilling quality inspection, in-situ soil sampling is required to facilitate subsequent analysis of parameters such as soil compaction and moisture content. The ring sampler method is commonly used for soil sampling. Its core is to use a ring sampler to cut a representative undisturbed soil sample, and then calculate parameters such as compaction by measuring density and moisture content. However, current in-situ soil sampling devices for various topographic conditions do not easily limit the sealing and moisturizing time of the sample after sampling. Low efficiency in sample handling due to trimming the ring sample end or forgetting to seal the sample can directly lead to significant moisture evaporation, especially in high-temperature scenarios, affecting sample accuracy. Furthermore, it is difficult to prevent excessive sample compression. When hammering the ring sampler, if the sample fills the ring sampler and hammering continues, it will cause excessive compression. Additionally, after sampling and sealing, the traditional ring sampler's sealing shell is prone to leakage during transportation due to wear or deformation, affecting the internal sample humidity. It is also difficult to provide leakage warnings during transport, further lowering sample standards.

[0003] Therefore, we propose an in-situ soil sampling device suitable for various geomorphic conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a soil in-situ sampling device suitable for various geomorphic conditions, so as to solve the problems mentioned in the background art that current soil in-situ sampling devices for various geomorphic conditions are not convenient for standardizing the sealing and moisturizing time of samples, and cannot prevent the samples from being over-compressed.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a soil in-situ sampling device suitable for various geomorphic conditions, comprising a sampling installation component, wherein a moisture-retaining sealing component is provided on the outer side of the sampling installation component; a stop control component is installed on the moisture-retaining sealing component; the stop control component is used to prevent sample failure; an overpressure protection component is installed on the sampling installation component; the overpressure protection component is connected in series with the sampling installation component and the stop control component; a leak detection indicator is installed on the sampling installation component; the sampling installation component includes: a sampling installation shell, a soil sleeve, and a sampling connecting ring, wherein the bottom of the sampling installation shell is threadedly connected to the soil sleeve; the bottom of the soil sleeve is threadedly connected to the sampling connecting ring; the bottom outer ring of the sampling connecting ring has a beveled structure; and the outer side of the sampling connecting ring is threaded.

[0006] Preferably, the sampling mounting component further includes: a sealing cover, a battery, and a time delay switch; the sealing cover is threadedly connected to the sampling mounting shell; the sealing cover has a hexagonal hole; the sampling mounting shell contains a battery; and a time delay switch is fixedly installed on the inner side of the sealing cover.

[0007] Preferably, the sampling mounting component further includes: a delay control post and a first spring, wherein the delay control post is slidably inserted into the bottom of the sampling mounting housing; the bottom end of the delay control post protrudes from the sampling mounting housing; the sampling mounting housing is provided with a first spring on its inner side; one end of the first spring is fixedly connected to the inner side of the sampling mounting housing, and the other end of the first spring is fixedly connected to the delay control post; the delay control post is located below the delay switch.

[0008] Preferably, the moisture-retaining sealing component includes: a protective cover and an indicator light, wherein the inner side of the protective cover is provided with threads; the protective cover is used for threaded connection to the sampling connecting ring; a rubber sleeve is fixedly fitted on the outer side of the protective cover; and an indicator light is fixedly installed on the rubber sleeve on the outer side of the protective cover.

[0009] Preferably, the stop control component includes: a stop mounting cylinder, a stop post, and a second spring. A ring of stop mounting cylinders is fixedly sleeved on the protective cover. Each ring of stop mounting cylinders passes through a rubber sleeve on the outer side of the protective cover. Each ring of stop mounting cylinders is slidably sleeved with a stop post, and the front end of each stop post passes through a ring of stop mounting cylinders. A second spring is sleeved inside each ring of stop mounting cylinders. Each ring of stop posts is used to stop the sampling connecting ring.

[0010] Preferably, the stop control component further includes: an electromagnet, wherein a ring of electromagnets is fixedly installed on the stop mounting cylinder, and each ring of electromagnets is aligned with a ring of stop posts; the electromagnets are used to magnetically attract the stop posts; one end of the second spring is connected to the electromagnet, and the other end of the second spring is fixedly connected to the stop post.

[0011] Preferably, the overpressure protection component includes: a mounting cover and an overpressure sliding post, wherein the mounting cover is fixedly mounted on the sampling mounting shell; the overpressure sliding post is slidably inserted into the sampling mounting shell and is located below the mounting cover; the overpressure sliding post protrudes from the sampling mounting shell; and the end of the overpressure sliding post is located above the end of the delay control post.

[0012] Preferably, the overvoltage protection component further includes: a third spring and a micro switch; the third spring is sleeved inside the mounting cover; one end of the third spring is fixedly connected to the inside of the mounting cover, and the other end of the third spring is fixedly connected to the overvoltage sliding column; a micro switch is fixedly installed inside the mounting cover; the battery, time delay switch, micro switch, indicator light, and a coil of electromagnet are connected in series by a wire; the sampling mounting shell is provided with a wire hole, and the wire hole between the wire and the sampling mounting shell is sealed.

[0013] Preferably, the leak detection indicator includes: an airbag tube and a rubber airbag, wherein the airbag tube is fixedly installed on the sampling mounting shell; a rubber airbag is fixedly installed on the airbag tube; and the rubber airbag is a rubber elastic structure.

[0014] Preferably, the leak detection indicator further includes a filling sponge, and the rubber airbag is filled with a filling sponge.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention employs a stop control component to facilitate sealing and moisturizing after sampling, preventing moisture loss and ensuring the accuracy of subsequent testing. Simultaneously, the combination of a moisturizing seal and the stop control component automatically ensures that personnel complete the sealing and moisturizing operation promptly after sampling; otherwise, the protective cap cannot be installed on the sampling connection ring to complete the seal, rendering the sample unusable. This improves the standardization of personnel sampling operations, making it particularly suitable for environments with high temperatures and wet terrain where moisture loss is rapid, and failure to seal the sample in time will result in moisture loss. The overpressure protection component further enhances the standardization of soil samples, preventing excessive compression of the soil sample when the bottom inner side of the sampling housing has already contacted the soil sample during downward tapping of the sealing cap to control the downward movement of the sampling housing. This improves the consistency of soil sample compaction and reduces interference with subsequent test results.

[0017] The leak detection unit can improve the monitoring effect of soil sample transportation and avoid the loss of a large amount of water in the soil sample due to wear or deformation of the sampling installation parts and protective cover after long-term use. This is especially important for samples with long delivery time, as it can also lead to inaccurate test data. This structure can provide a simple and intuitive leak warning through a rubber airbag, allowing soil testing personnel to quickly determine whether there is a leak when they receive the structure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an in-situ soil sampling device applicable to various geomorphic conditions according to the present invention.

[0019] Figure 2 This is a bottom schematic diagram of a soil in-situ sampling device suitable for various terrain conditions according to the present invention.

[0020] Figure 3 This is a cross-sectional view of the internal structure of the leak detection indicator of the present invention;

[0021] Figure 4 This is a schematic diagram of the sampling installation component structure of the present invention;

[0022] Figure 5 For the present invention Figure 4Enlarged view of the structure of region B in the middle;

[0023] Figure 6 This is a schematic diagram of the moisture-retaining sealing component structure of the present invention;

[0024] Figure 7 For the present invention Figure 6 Enlarged view of the structure of region C in the middle;

[0025] Figure 8 For the present invention Figure 4 Enlarged view of the structure of region D in the middle;

[0026] Figure 9 This is a schematic diagram of the leak detection and warning mechanism of the present invention;

[0027] Figure 10 This is a control system diagram of the time-delay switch and micro switch of the present invention.

[0028] In the diagram: 1. Sampling mounting component; 101. Sampling mounting shell; 102. Soil sleeve; 103. Sampling connecting ring; 104. Sealing cover; 105. Battery; 106. Time delay switch; 107. Time delay control column; 1071. First spring; 2. Moisture-retaining sealing component; 201. Protective cover; 202. Indicator light; 3. Stop control component; 301. Stop mounting cylinder; 302. Stop column; 303. Second spring; 304. Electromagnet; 4. Overpressure protection component; 401. Mounting cover; 402. Overpressure sliding column; 403. Third spring; 404. Micro switch; 5. Leak detection indicator; 501. Airbag tube; 502. Rubber airbag; 5021. Filling sponge. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figures 1 to 10 As shown:

[0031] This invention provides a technical solution: a soil in-situ sampling device suitable for various terrain conditions, including a sampling installation component 1, with a moisture-retaining sealing component 2 on the outside of the sampling installation component 1; a stop control component 3 is installed on the moisture-retaining sealing component 2; the stop control component 3 is used to prevent sample failure; an overpressure protection component 4 is installed on the sampling installation component 1; the overpressure protection component 4 is connected in series with the sampling installation component 1 and the stop control component 3; a leak detection indicator 5 is installed on the sampling installation component 1; the sampling installation component 1 includes: a sampling installation shell 101, a soil sleeve 102, and a sampling connecting ring 103, with the soil sleeve 102 threadedly connected to the bottom of the sampling installation shell 101; the sampling connecting ring 103 is threadedly connected to the bottom of the soil sleeve 102; the lengths of the soil sleeve 102 and the sampling connecting ring 103 can be set according to requirements; the bottom outer ring of the sampling connecting ring 103 has a beveled structure; the outer side of the sampling connecting ring 103 is threaded.

[0032] The sampling installation component 1 also includes: a sealing cover 104, a battery 105, and a time delay switch 106. The sealing cover 104 is threaded onto the sampling installation shell 101. The sealing cover 104 has a hexagonal hole. The sampling installation shell 101 contains the battery 105. The time delay switch 106 is fixedly installed inside the sealing cover 104. The NKPZ-22 type time delay switch 106 can be used, with a delay time of three minutes. Alternatively, the delay time can be preset according to the length of the soil sleeve 102. After assembling the sampling installation shell 101, the soil sleeve 102, and the sampling connecting ring 103, it is convenient to carry out in-situ soil sampling. By placing the sampling connecting ring 103 on the ground and gently tapping the sealing cover 104 with a hammer, the sampling installation shell 101 is inserted into the soil. Then, the soil sample is taken out. After the soil sample is taken out, the bottom of the sampling connecting ring 103 can be flattened with a scraper to facilitate subsequent sealing operations.

[0033] The sampling mounting component 1 further includes: a delay control post 107 and a first spring 1071. The delay control post 107 is slidably inserted into the bottom of the sampling mounting shell 101; the bottom end of the delay control post 107 protrudes from the sampling mounting shell 101; the first spring 1071 is provided inside the sampling mounting shell 101; one end of the first spring 1071 is fixedly connected to the inside of the sampling mounting shell 101, and the other end of the first spring 1071 is fixedly connected to the delay control post 107; the delay control post 107 is located below the delay switch 106; the moisture-retaining sealing component 2 includes: a protective cover 201 and an indicator light 202. The protective cover 201 is threaded inside; the protective cover 201 is used for... The sampling connection ring 103 is threaded onto the protective cover 201; a rubber sleeve is fixedly fitted on the outer side of the protective cover 201; an indicator light 202 is fixedly installed on the rubber sleeve on the outer side of the protective cover 201; the stop control component 3 includes: a stop mounting cylinder 301, a stop post 302, and a second spring 303. A ring of stop mounting cylinders 301 is fixedly fitted onto the protective cover 201; a ring of stop mounting cylinders 301 passes through the rubber sleeve on the outer side of the protective cover 201; a stop post 302 is slidably fitted onto a ring of stop mounting cylinders 301, and the front end of a ring of stop post 302 passes through a ring of stop mounting cylinders 301; a second spring is fitted inside a ring of stop mounting cylinders 301. Spring 303; a ring of stop posts 302 is used to stop the sampling connecting ring 103; the stop control component 3 also includes: an electromagnet 304, a ring of electromagnets 304 is fixedly installed on the stop mounting cylinder 301, and each ring of electromagnets 304 is aligned with a ring of stop posts 302; the electromagnets 304 are used to magnetically attract the stop posts 302; one end of the second spring 303 is connected to the electromagnet 304, and the other end of the second spring 303 is fixedly connected to the stop post 302; the use of the stop control component 3 facilitates sealing and moisturizing after sampling, avoiding moisture loss and affecting the subsequent detection accuracy, and at the same time, the moisturizing sealing component 2 works in conjunction with the stop control component 3. It can automatically restrict staff from quickly sealing and moisturizing the soil after sampling. Otherwise, the protective cover 201 cannot be installed on the sampling connection ring 103 for sealing, and the sample will be invalid. This can improve the standardization of staff sampling operations, especially in environments with high temperature and wet terrain where moisture loss is rapid. Failure to seal the sample in time will cause moisture loss and interfere with subsequent test results. It realizes linkage control between the sampling process and sealing operation, forming a standardized sampling process. It is especially suitable for batch sampling and scenarios with variable terrain humidity. It can ensure the uniformity of sampling quality of all samples and improve the standardization and professionalism of sampling work.Gently tap the sealing cover 104 with a hammer to insert the sampling mounting shell 101 into the soil. As the sampling mounting shell 101 moves downward, when the soil approaches the top inner side of the sampling mounting shell 101, it will compress the delay control column 107. At this time, the delay control column 107 will move upward to compress the first spring 1071. The delay switch 106 will then be pressed, controlling the delay energization time of the electromagnet 304. At this time, the electromagnet 304 will magnetically attract the stop column 302 to retract, and the protective cover 201 can be manually threaded onto the sampling connecting ring 103 for sealing.

[0034] The overvoltage protection component 4 includes: a mounting cover 401 and an overvoltage sliding post 402. The mounting cover 401 is fixedly mounted on the sampling mounting shell 101; the overvoltage sliding post 402 is slidably inserted into the sampling mounting shell 101, and the overvoltage sliding post 402 is located below the mounting cover 401; the overvoltage sliding post 402 protrudes from the sampling mounting shell 101; the end of the overvoltage sliding post 402 is located above the end of the delay control post 107; the overvoltage protection component 4 also includes: a third spring 403 and a micro switch 404. A third spring 403 is fitted inside the mounting cover 401; one end of the third spring 403 is fixedly connected to the inside of the mounting cover 401, and the other end of the third spring 403 is fixedly connected to the overpressure sliding post 402; a micro switch 404 is fixedly installed inside the mounting cover 401; the battery 105, the time delay switch 106, the micro switch 404, the indicator light 202, and a coil of electromagnet 304 are connected in series by wires; the sampling mounting shell 101 is provided with a wire hole, and the wire hole between the wire and the sampling mounting shell 101 is connected in series. The sealing between the two parts; the use of overpressure protection component 4 can further improve the standardization of soil sampling samples, and avoid the problem of excessive compression of soil samples when the bottom inner side of the sampling installation shell 101 is already in contact with the soil sample after the sealing cover 104 is knocked down to control the sampling installation shell 101 to move down for sampling. This improves the consistency of soil sample compaction, reduces interference with subsequent test results, solves the industry pain point of excessive compression of soil samples caused by excessive knocking, improves the standardization and uniformity of soil samples, and avoids unqualified samples that are over-compressed being sealed and sent for testing, thus preventing unqualified samples from entering the testing process from the source; if the delay switch 106 is pressed and the staff continues to gently knock the sealing cover 104 down with a hammer, the top of the soil sample will squeeze the overpressure sliding column 402. After the overpressure sliding column 402 is squeezed up, it will squeeze the micro switch 404, control the electromagnet 304 to be de-energized, and the stop column 302 will directly extend the stop. At this time, the staff cannot install the protective cover 201.

[0035] In Example 2, based on Example 1, the leak detection indicator 5 includes: an airbag tube 501 and a rubber airbag 502. The airbag tube 501 is fixedly installed on the sampling installation shell 101; the rubber airbag 502 is fixedly installed on the airbag tube 501; the rubber airbag 502 is a rubber elastic structure; the leak detection indicator 5 also includes: a filling sponge 5021, which can prevent soil from falling into the rubber airbag 502; the rubber airbag 502 is filled with the filling sponge 5021; the leak detection indicator 5 can be used to improve the monitoring effect of soil sample transportation, and avoid the loss of a large amount of water in the soil sample due to wear or deformation after long-term use of the sampling installation component 1 and the protective cover 201. Especially for long delivery times, this can also cause inaccurate test data. This structure can provide a simple and intuitive leak warning through the rubber airbag 502. Soil testing personnel can quickly determine whether there is a leak when they receive this structure, improving the monitoring effect of sample transportation, ensuring the reliability of sample sealing, and providing strong support for the whole process control of sample quality.

[0036] The working principle of this embodiment is as follows: Place the sampling connecting ring 103 on the ground and gently tap the sealing cover 104 with a hammer to insert the sampling mounting shell 101 into the soil. As the sampling mounting shell 101 moves downward, when the soil approaches the top of the inner side of the sampling mounting shell 101, it will squeeze the delay control column 107. At this time, the delay control column 107 will move upward to compress the first spring 1071. At this time, the delay switch 106 will be pressed, realizing the control of the delayed energization time of the electromagnet 304. At this time, the electromagnet 304 will magnetically attract the stop column 302 to retract, squeezing the second spring 303. When the operator observes the retraction of the stop column 302, he can stop tapping the sealing cover 104 and then quickly place the sampling ring into the soil. The soil around the sample mounting shell 101 is removed to facilitate the extraction of soil samples. After the soil samples are removed, the bottom of the sampling connecting ring 103 can be flattened with a scraper. At this time, the protective cover 201 can be manually threaded onto the sampling connecting ring 103. The stop post 302 retracts and does not stop the sampling connecting ring 103, allowing for normal sealing. Conversely, if the sealing is not completed within the delayed energizing time, the electromagnet 304 will be de-energized, and the corresponding stop post 302 will be pushed out by the second spring 303. In this case, the stop post 302 will stop the sampling connecting ring 103, preventing the installation of the protective cover 201. The sampling is then invalid and needs to be repeated.

[0037] If the delay switch 106 is pressed and the staff continues to gently tap the sealing cover 104 with a hammer to move it down, the top of the soil sample will be squeezed by the overpressure sliding column 402. After the overpressure sliding column 402 is squeezed upward, the top of the sample block will be at risk of being excessively squeezed by the bottom of the inner side of the sampling installation shell 101. At this time, the overpressure sliding column 402 will move upward to compress the third spring 403 and squeeze the micro switch 404. Since the battery 105, delay switch 106, micro switch 404, indicator light 202 and a coil of electromagnet 304 are connected in series by wires, even if the delay switch 106 is still in the delayed power-on state, the micro switch 404 will directly control the coil of electromagnet 304 to de-energize, and the coil of stop column 302 will extend again, making it impossible to install the protective cover 201 and preventing the sample from being directly sealed and sent for testing.

[0038] During sampling, the rubber airbag 502 can be manually squeezed to release air. After the protective cover 201 is screwed onto the sampling connecting ring 103 to complete the seal, the rubber airbag 502 is released. The filling sponge 5021 provides internal elastic support. At this point, the sampling mounting component 1 is internally sealed, and the rubber airbag 502 remains deflated, ready for subsequent transportation. If leakage occurs during the process, the internal and external pressures of the sampling mounting component 1 will balance. At this time, the filling sponge 5021 will elastically recover, and the rubber airbag 502 will also return to its original shape under its own elasticity. Figure 2 The bulging state shown indicates that the sample has poor sealing and needs to be discarded. If the internal seal of the sampling installation 1 is good, the rubber airbag 502 will remain deflated. When testing normal soil samples in the laboratory, the sampling installation shell 101 and the sampling connecting ring 103 can be rotated and disassembled respectively, leaving only the soil inside the soil sleeve 102. After scraping the two ends of the soil sleeve 102 flat with a scraper, subsequent soil sample testing can be carried out.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A soil in-situ sampling device suitable for various geomorphic conditions, comprising a sampling mounting component (1), wherein a moisture-retaining sealing component (2) is provided on the outside of the sampling mounting component (1); characterized in that: A stop control component (3) is installed on the moisture-retaining sealing component (2); the stop control component (3) is used to prevent sample failure; An overpressure protection device (4) is installed on the sampling installation component (1); the overpressure protection device (4) is connected in series with the sampling installation component (1) and the stop control device (3). The sampling installation component (1) is equipped with a leak detection indicator (5); The sampling installation component (1) includes: a sampling installation shell (101), a soil sleeve (102), and a sampling connecting ring (103). The bottom of the sampling installation shell (101) is threadedly connected to the soil sleeve (102); the bottom of the soil sleeve (102) is threadedly connected to the sampling connecting ring (103); the bottom outer ring of the sampling connecting ring (103) has a beveled structure; the outer side of the sampling connecting ring (103) is threaded. The sampling mounting component (1) further includes: a sealing cover (104), a battery (105), and a time delay switch (106). The sealing cover (104) is threaded onto the sampling mounting shell (101). The sealing cover (104) has a hexagonal hole. The battery (105) is located inside the sampling mounting shell (101). The time delay switch (106) is fixedly installed inside the sealing cover (104). The sampling mounting component (1) further includes: a delay control post (107) and a first spring (1071). The delay control post (107) is slidably inserted into the bottom of the sampling mounting shell (101). The bottom end of the delay control post (107) protrudes from the sampling mounting shell (101). The sampling mounting shell (101) is provided with a first spring (1071) on its inner side. One end of the first spring (1071) is fixedly connected to the inner side of the sampling mounting shell (101), and the other end of the first spring (1071) is fixedly connected to the delay control post (107). The delay control post (107) is located below the delay switch (106). The moisture-retaining sealing component (2) includes: a protective cover (201) and an indicator light (202). The inner side of the protective cover (201) is provided with threads. The protective cover (201) is used to be threaded onto the sampling connecting ring (103). A rubber sleeve is fixedly fitted on the outer side of the protective cover (201). An indicator light (202) is fixedly installed on the rubber sleeve on the outer side of the protective cover (201). The stop control component (3) includes: a stop mounting cylinder (301), a stop post (302), and a second spring (303). A stop mounting cylinder (301) is fixedly sleeved on the protective cover (201). The stop mounting cylinder (301) passes through the rubber sleeve on the outside of the protective cover (201). A stop post (302) is slidably sleeved on the stop mounting cylinder (301), and the front end of the stop post (302) passes through the stop mounting cylinder (301). A second spring (303) is sleeved inside the stop mounting cylinder (301). The stop post (302) is used to stop the sampling connecting ring (103). The stop control component (3) further includes: an electromagnet (304), a ring of electromagnets (304) is fixedly installed on the stop mounting cylinder (301), and each ring of electromagnets (304) is aligned with a ring of stop posts (302); the electromagnets (304) are used to magnetically attract the stop posts (302); one end of the second spring (303) is connected to the electromagnet (304), and the other end of the second spring (303) is fixedly connected to the stop post (302).

2. The soil in-situ sampling device suitable for multiple geomorphic conditions according to claim 1, characterized in that: The overpressure protection component (4) includes: a mounting cover (401) and an overpressure sliding post (402). The mounting cover (401) is fixedly mounted on the sampling mounting shell (101). The overpressure sliding post (402) is slidably inserted into the sampling mounting shell (101), and the overpressure sliding post (402) is located below the mounting cover (401). The overpressure sliding post (402) protrudes from the sampling mounting shell (101). The end of the overpressure sliding post (402) is located above the end of the delay control post (107).

3. A soil in-situ sampling device suitable for multiple geomorphic conditions according to claim 2, characterized in that: The overvoltage protection component (4) further includes: a third spring (403) and a micro switch (404). The third spring (403) is sleeved inside the mounting cover (401). One end of the third spring (403) is fixedly connected to the inside of the mounting cover (401), and the other end of the third spring (403) is fixedly connected to the overvoltage sliding column (402). The micro switch (404) is fixedly installed inside the mounting cover (401). The battery (105), the time delay switch (106), the micro switch (404), the indicator light (202), and a coil of electromagnets (304) are connected in series by wires. The sampling mounting shell (101) is provided with a wire hole, and the wire hole between the wire and the sampling mounting shell (101) is sealed.

4. A soil in-situ sampling device suitable for multiple geomorphic conditions according to claim 1, characterized in that: The leak detection indicator (5) includes an airbag tube (501) and a rubber airbag (502). The airbag tube (501) is fixedly installed on the sampling installation shell (101). The rubber airbag (502) is fixedly installed on the airbag tube (501). The rubber airbag (502) is a rubber elastic structure.

5. A soil in-situ sampling device suitable for multiple geomorphic conditions according to claim 4, characterized in that: The leak detection indicator (5) further includes a filling sponge (5021), and the rubber airbag (502) is filled with a filling sponge (5021).

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