Portable and easy-to-process auxiliary tool for deep sand stratified sampling of mobile dunes

Abstract

The utility model relates to sampling device technical field discloses a portable and easy processing's flow dune deep layer sand soil layered sampling auxiliary tool, including the bottom cylinder that is pressed into the sand dune and is integrated with the upper and lower sleeve connection of the cylindrical structure that has been pressed into the sand soil one by one in order, anti -pollution connecting cylinder and anti -interference extension cylinder. Through using the equipment of similar top pipe technology carries out flow dune deep layer sand soil layered sampling, first press into the sand soil in the vertical section of cylindrical structure, the sand soil in the cylindrical structure is hollowed out in the process of pressing into the sand soil and is sampled, adjusts the connection between each section of cylindrical structure simultaneously, ensures that the upper layer sand soil that leaks along the joint will not fall into the cylinder and pollute the sample. And with the help of pulling out cylinder patch ensures that the sampling can be recycled. The above points ensure that the flow dune deep layer sand soil layered sampling can be carried out smoothly. And all the components above are section by section PVC pipe and cylindrical tile cut from PVC pipe, easy to process and carry.

Description

Technical Field

[0001] This utility model relates to the field of sampling device technology, and in particular to a portable and easy-to-process auxiliary tool for stratified sampling of deep sand in mobile dunes. Background Technology

[0002] In the arid deserts of Northwest China, scientific research on sand dunes requires collecting soil samples at different depths to determine soil moisture content, mechanical composition, and nutrient changes. After spring, as temperatures rise, evaporation intensifies, causing the underground wet soil layer to rapidly descend, sometimes to below 1 meter. This creates quicksand on the upper dunes, making it difficult to collect samples from lower layers due to severe sand slippage during digging. Using a soil drill to collect dry sand results in insufficient friction between the sample and the drill bit, and the loose sample structure makes it difficult to extract. Even when forced to use the drill, sand from different depths mixes within the drill bit during extraction, making precise stratification studies unsuitable. Furthermore, monitoring soil moisture content without irrigation further complicates the process.

[0003] Sand is easy to excavate, so pits can be dug and samples taken using the ring sampler method or profile sampling. This method is also applicable to sand dunes. However, pits dug on shifting sand dunes are more prone to collapse than those on flat ground (collapse is almost unavoidable in practice), requiring much larger pits for sampling. Furthermore, heavy physical labor on sand dunes is inconvenient, and large machinery cannot be used (it cannot be driven onto the dunes). All these factors combined make stratified sampling of deep sand on sand dunes extremely difficult. Utility Model Content

[0004] This invention provides a portable and easy-to-process auxiliary tool for stratified sampling of deep sand in mobile dunes.

[0005] The technical problem to be solved is that it is very difficult to perform layered sampling of deep sand on shifting dunes.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a portable and easy-to-process auxiliary tool for deep sand layer sampling in mobile dunes, comprising three cylindrical structures from bottom to top: a bottom cylinder, a pollution-proof connecting cylinder, and an interference-proof extension cylinder; When conducting layered sampling of deep sand in mobile dunes, the bottom cylinder, the anti-pollution connecting cylinder, and the anti-interference extension cylinder are pressed into the dune one by one in sequence and are connected to the cylindrical structure that has been pressed into the sand as a whole. The anti-pollution connecting cylinder is sleeved outside the ends of the bottom cylinder and the anti-interference extension cylinder to prevent the upper layer of sand that leaks down along the joint from contaminating the internal sand sample. The sand sample is the sand inside the sampling aid tool. The depth of each press of the sampling aid tool is the depth of one layer of sand sample. After each press of the sampling aid tool in the dune, the sand inside is completely emptied. The bottom cylinder is equipped with a pull-out auxiliary structure to ensure that the sampling auxiliary tool can be pulled out after sampling. The anti-pollution connecting cylinder is equipped with a limiting structure to prevent the bottom cylinder and the anti-interference extension cylinder from being inserted too deeply into the anti-pollution connecting cylinder. The pull-out auxiliary structure and the limiting structure shall not interfere with the downward extension path of the sampling device that extends into the bottom of the sampling auxiliary tool.

[0007] Furthermore, the tube-pulling auxiliary structure is a tube-pulling patch that is attached to the side wall of the bottom tube and fixedly connected to the bottom tube, and the limiting structure is a limiting patch that is attached to the side wall of the anti-pollution connecting tube and fixedly connected to the side wall of the anti-pollution connecting tube. Both the tube-pulling patch and the limiting patch are cylindrical tile-shaped structures.

[0008] Furthermore, two pull tube patches are symmetrically arranged inside the bottom cylinder, and the distance between the bottom of each pull tube patch and the bottom end of the bottom cylinder is not less than the height of the shovel head. The limiting patch is arranged in two layers inside the anti-pollution connecting cylinder. The distance between the top of the upper limiting patch and the top of the anti-pollution connecting cylinder is 10-15 cm, and the distance between the top of the lower limiting patch and the bottom of the anti-pollution connecting cylinder is 10-15 cm. Each layer of limiting patches consists of two symmetrically arranged pieces.

[0009] Furthermore, the sampling auxiliary tool has vertically extending scale lines inside, used to indicate the depth of the sampling auxiliary tool's downward pressure. The scale lines are in place when the bottom cylinder, the anti-pollution connecting cylinder, and the anti-interference extension cylinder are connected as one unit on the ground.

[0010] Furthermore, the total length of the sampling aid after connection is not less than 1 meter.

[0011] Furthermore, the bottom cylinder and the anti-interference extension cylinder are rigid PVC pipes with a length of 40-50 cm and an inner diameter of not less than 35 cm, and the anti-pollution connecting cylinder is a rigid PVC pipe with a length of 40 cm and an inner diameter that is 1-2 mm larger than the outer diameter of the bottom cylinder and the anti-interference extension cylinder.

[0012] Compared with existing technologies, this utility model provides a portable and easy-to-process auxiliary tool for deep sand layer sampling in mobile dunes, which has the following advantages: In this invention, a device similar to pipe jacking is used for stratified sampling of deep sand in mobile dunes. First, a cylindrical structure is vertically pressed into the sand section by section. During this pressing process, the sand inside the cylindrical structure is scooped out layer by layer for sampling. Simultaneously, the connections between the sections of the cylindrical structure are adjusted to ensure that upper-layer sand leaking through the joints does not fall into the cylinder and contaminate the sample. A pull-out patch ensures that the auxiliary tools can be retrieved after sampling. The combination of these features ensures successful stratified sampling of deep sand in mobile dunes. Furthermore, all components are made of sections of PVC pipe and cylindrical tiles cut from PVC pipe, making them easy to process and carry. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a portable and easy-to-process auxiliary tool for deep sand layer sampling in mobile dunes according to the present invention. Figure 2 This is a schematic diagram of the structure of a portable and easy-to-process auxiliary tool for deep sand layer sampling in mobile dunes during use. In the diagram, 1-bottom cylinder, 11-pull-out patch, 2-anti-pollution connecting cylinder, 21-limiting patch, 3-anti-interference extension cylinder. Detailed Implementation

[0014] Note that this utility model differs from technologies such as CN219694594U that rely on a sampler to bring out sand and soil. This utility model itself cannot perform sampling, but rather creates a stable and non-collapsed deep sand and soil stratification sampling space. Sampling is done using tools that need to be prepared separately, such as a sampling spoon and a shovel.

[0015] Taking the 2024 Xinjiang Uygur Autonomous Region Major Science and Technology Project "Research and Application of Key Technologies for the Construction of Forest and Grassland Belts on the Edge of Deserts" as an example, such as... Figure 1-2 As shown, a portable and easy-to-process auxiliary tool for deep sand layer sampling in mobile dunes includes, from bottom to top, three cylindrical structures: a bottom cylinder 1, a pollution-proof connecting cylinder 2, and an interference-proof extension cylinder 3 (extending the utility model without causing interference to the internal operation path). When conducting layered sampling of deep sand in mobile dunes, the bottom cylinder 1, the anti-pollution connecting cylinder 2, and the anti-interference extension cylinder 3 are pressed into the dune one by one in sequence and are connected to the cylindrical structure that has been pressed into the sand as a whole. The anti-pollution connecting cylinder 2 is fitted outside the ends of the bottom cylinder 1 and the anti-interference extension cylinder 3 to prevent the upper layer of sand that leaks down along the joint from contaminating the internal sand sample. The sampling method here is similar to pipe jacking, involving pushing a pipe into the soil and then emptying the soil inside. However, there are some differences. Conventional pipe jacking uses a pipe of equal diameter to be horizontally pushed into the soil; here, multiple sections of pipe with different diameters are used to prevent upper-layer sand from leaking through the joints and contaminating the internal sand samples. For the joint between the bottom cylinder 1 and the anti-contamination connecting cylinder 2, the sand in the joint will fall outside. For the joint between the anti-contamination connecting cylinder 2 and the anti-interference extension cylinder 3, because the channel has been enlarged by the anti-contamination connecting cylinder 2, the ground pressure outside the anti-interference extension cylinder 3 is reduced, resulting in less and finer sand leaking through the joint. The incoming sand will then fall outside along the joint between the bottom cylinder 1 and the anti-contamination connecting cylinder 2. If possible, the top circumference of the anti-contamination connecting cylinder 2 can be thinned and some vertical cuts made. Then, after the anti-interference extension cylinder 3 is inserted, the outside of the anti-contamination connecting cylinder 2 can be tightened with hose clamps or wire ties to completely prevent sand from entering. However, this is generally not necessary in actual operation.

[0016] Of course, if the anti-interference extension sleeve 3 is fitted over the end of the anti-contamination connecting sleeve 2, the effect of preventing sand and soil from falling in will be better. However, in actual operation, it was found that this would lead to excessive ground resistance during the pipe jacking process. After all, unlike the real pipe jacking process, the power here relies entirely on manpower, and excessive resistance would prevent the utility model from being pressed into the soil. However, the connection between the bottom sleeve 1 and the anti-contamination connecting sleeve 2 must be such that the anti-contamination connecting sleeve 2 is fitted over the top of the bottom sleeve 1, and cannot be reversed, otherwise the sample contamination will be very serious.

[0017] The sand sample is the sand inside the sampling aid tool. The depth of each press of the sampling aid tool is the depth of one layer of sand sample. After each press of the sampling aid tool in the dune, the sand inside is completely emptied. Various tools such as shovels and long-handled sampling spoons can be used to hollow out the sand from inside this utility model.

[0018] The bottom cylinder 1 is equipped with a pull-out auxiliary structure to ensure that the sampling auxiliary tool can be pulled out after sampling. The anti-pollution connecting cylinder 2 is equipped with a limiting structure to prevent the bottom cylinder 1 and the anti-interference extension cylinder 3 from being inserted too deeply into the anti-pollution connecting cylinder 2. The pull-out auxiliary structure and the limiting structure shall not interfere with the downward extension path of the sampling device that extends into the bottom of the sampling auxiliary tool.

[0019] In other words, the interior of this utility model needs to be an unobstructed straight cylinder; otherwise, sampling, emptying the internal sand, and pulling the utility model out of the sand will all be blocked.

[0020] The auxiliary structure for pulling out the tube is a tube-pulling patch 11 that is attached to the side wall of the bottom tube 1 and fixedly connected to the bottom tube 1. The limiting structure is a limiting patch 21 that is attached to the side wall of the anti-pollution connecting tube 2 and fixedly connected to the side wall of the anti-pollution connecting tube 2. Both the tube-pulling patch 11 and the limiting patch 21 are cylindrical tile-shaped structures (also known as fan-shaped blocks, which are structures formed by cutting a cylinder into multiple pieces along the axial direction).

[0021] The pull tab 11 here is a structure that facilitates the removal of this utility model from inside the bottom cylinder 1. Removing it from the outside is basically not feasible. Removing it from the outside is basically only possible by tying a rope to the outside of the bottom cylinder 1 beforehand and pulling it after sampling, but such pulling is difficult and can easily tear the cylinder wall.

[0022] When using this utility model, the bottom of the pull tube patch 11 is struck with the head of a shovel to gradually pull it out.

[0023] Two pull-out tabs 11 are symmetrically arranged inside the bottom cylinder 1. The distance between the bottom of each pull-out tab 11 and the bottom end of the bottom cylinder 1 is not less than the height of the shovel head, thereby ensuring that the present invention can be pulled out by striking with a shovel.

[0024] The limiting patch 21 is arranged in two layers inside the anti-pollution connecting cylinder 2. The distance between the top of the upper limiting patch 21 and the top of the anti-pollution connecting cylinder 2 is 10-15 cm, and the distance between the top of the lower limiting patch 21 and the bottom of the anti-pollution connecting cylinder 2 is 10-15 cm. Each layer of limiting patch 21 consists of two symmetrically arranged pieces.

[0025] The above arrangement ensures reliable connection while avoiding wasted length.

[0026] The sampling aid has vertically extending scale lines inside, used to indicate the depth of the sampling aid. The scale lines are in place when the bottom cylinder 1, the anti-pollution connecting cylinder 2, and the anti-interference extension cylinder 3 are connected as one unit on the ground.

[0027] The total length of the sampling aid after connection should not be less than 1 meter. This depth is meaningful because when sampling mobile dunes, it is necessary to collect the wet soil layer, which is often less than one meter deep in spring.

[0028] In this embodiment, the bottom cylinder 1 and the anti-interference extension cylinder 3 are rigid PVC pipes with a length of 40-50 cm and an inner diameter of not less than 35 cm. The anti-contamination connecting cylinder 2 is a rigid PVC pipe with a length of 40 cm and an inner diameter 1-2 mm larger than the outer diameter of the bottom cylinder 1 and the anti-interference extension cylinder 3. This size ensures sufficient sampling space and depth.

[0029] This utility model discloses a portable and easy-to-process auxiliary tool for deep sand layer sampling in mobile dunes. Its usage method includes the following steps: Step 1: Press the bottom pipe into the sand in multiple stages. The depth of each pressing is the burial depth of the sand sample taken once. Each pressing is followed by sampling and emptying the sand inside the device. The same applies below. Step 2: When the top of the bottom pipe is close to the ground surface, put the anti-pollution connecting cylinder 2 on top of the bottom pipe, and then continue to press down on this utility model in multiple stages; Step 3: When the top of the anti-pollution connecting cylinder 2 is close to the ground, insert the anti-interference extension cylinder 3 into the anti-pollution connecting cylinder 2, and then continue to press down on this utility model in multiple stages; Step 4: After sampling, use the top of the shovel head to tap the bottom of the pull tube patch 11 and pull out the utility model.

[0030] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A portable and easy-to-process auxiliary tool for stratified sampling of deep sand in mobile dunes, characterized in that: From bottom to top, it includes three cylindrical structures: a bottom cylinder (1), a pollution-proof connecting cylinder (2), and an interference-proof extension cylinder (3); When conducting layered sampling of deep sand in mobile dunes, the bottom cylinder (1), the anti-pollution connecting cylinder (2), and the anti-interference extension cylinder (3) are pressed into the dune one by one in sequence and are connected to the cylindrical structure that has been pressed into the sand. The anti-pollution connecting cylinder (2) is placed outside the ends of the bottom cylinder (1) and the anti-interference extension cylinder (3) to prevent the upper layer of sand that leaks down along the joint from contaminating the internal sand sample. The sand sample is the sand inside the sampling aid tool. The depth of each press of the sampling aid tool is the depth of one layer of sand sample. After each press of the sampling aid tool in the dune, the sand inside is completely emptied. The bottom cylinder (1) is provided with a pull-out auxiliary structure to ensure that the sampling auxiliary tool can be pulled out after sampling. The anti-pollution connecting cylinder (2) is provided with a limiting structure to prevent the bottom cylinder (1) and the anti-interference extension cylinder (3) from being inserted too deeply into the anti-pollution connecting cylinder (2). The pull-out auxiliary structure and the limiting structure shall not interfere with the downward extension path of the sampling device that extends into the bottom of the sampling auxiliary tool.

2. The portable and easily processed auxiliary tool for deep sand layer sampling in mobile dunes according to claim 1, characterized in that: The auxiliary structure for pulling the tube is a tube-pulling patch (11) that is attached to the side wall of the bottom tube (1) and fixedly connected to the bottom tube (1). The limiting structure is a limiting patch (21) that is attached to the side wall of the anti-pollution connecting tube (2) and fixedly connected to the side wall of the anti-pollution connecting tube (2). Both the tube-pulling patch (11) and the limiting patch (21) are cylindrical tile-shaped structures.

3. The portable and easily processed auxiliary tool for deep sand layer sampling in mobile dunes according to claim 2, characterized in that: Two pull tube patches (11) are symmetrically arranged inside the bottom cylinder (1), and the distance between the bottom of each pull tube patch (11) and the bottom end of the bottom cylinder (1) is not less than the height of the shovel head; The limiting patch (21) is arranged in two layers inside the anti-pollution connecting tube (2). The distance between the top of the upper limiting patch (21) and the top of the anti-pollution connecting tube (2) is 10-15 cm, and the distance between the top of the lower limiting patch (21) and the bottom of the anti-pollution connecting tube (2) is 10-15 cm. Each layer of limiting patch (21) consists of two symmetrically arranged pieces.

4. The portable and easily processed auxiliary tool for deep sand layer sampling in mobile dunes according to claim 1, characterized in that: The total length of the sampling aid after connection is not less than 1 meter.

5. The portable and easily processed auxiliary tool for deep sand layer sampling in mobile dunes according to claim 4, characterized in that: The bottom tube (1) and the anti-interference extension tube (3) are rigid PVC pipes with a length of 40-50 cm and an inner diameter of not less than 35 cm. The anti-pollution connecting tube (2) is a rigid PVC pipe with a length of 40 cm and an inner diameter 1-2 mm larger than the outer diameter of the bottom tube (1) and the anti-interference extension tube (3).

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