Layered sampling device for wetland soil

Abstract

The invention relates to a layered sampling device for wetland soil. The device comprises a sampling column and a cutting structure. The sampling column is of a hollow columnar structure, and slits are formed in the positions where layering is needed. And the cutting structure consists of a cutting platform, a rotating shaft, a push plate, a cutting plate and a baffle plate, and is arranged on the outer side of the sampling column. When the sampling column is downwards inserted into a wetland soil column, a columnar wetland soil sample is completely attached to the interior of the sampling column. When sampling is finished and the sampling device is taken out from the wetland soil upwards, the wetland soil moves downwards relative to the sampling device, and the push plate pushes the cutting plate, so that the cutting plate moves towards the inner side to complete the segmentation of the columnar sample. The in-situ columnar sampling device is simple in structure and convenient to operate, and can be used for in-situ columnar sampling of wetland soil and layering treatment of samples during sampling.

Description

Technical Field

[0001] The invention belongs to the technical field of soil investigation, and in particular to a wetland soil stratification sampling device. The invention is suitable for in-situ columnar stratification sampling of wetland soil, and can provide equipment technical support for vertical profile research of related wetland soil. Background Art

[0002] Wetlands are important ecosystems, and wetland soils are important carriers of material circulation and energy flow. Especially with the deepening of wetland carbon cycle research, the importance of vertical material differences in wetland soils for accurate estimation of soil carbon pools and detailed characterization of material and energy cycles has been increasingly valued.

[0003] There are many kinds of devices for soil sampling at present. However, there are the following main shortcomings: there are few existing devices for columnar layered sampling of wetland soil. Wetland soil has the characteristics of high humidity and strong fluidity. Ordinary soil sampling devices are not well suited for wetland soil; existing wetland soil sampling devices need to sample soil at different depths multiple times. After completing the first depth sampling, due to the loose soil, the soil on the inner wall of the sampling hole will fall to the bottom of the sampling point. When sampling again, it will cause the soil at different depths to mix, thus affecting the results of soil testing.

[0004] In view of the problems existing in the above-mentioned wetland soil stratification sampling device, the present invention adopts a relatively simple structure and utilizes the relatively soft characteristics of wetland soil to achieve the purpose of stratifying columnar wetland soil samples while sampling. At the same time, the present invention can be stacked and connected vertically to meet different stratification requirements, and has wide applicability. Summary of the invention

[0005] Purpose of the invention: In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a wetland soil stratification sampling device.

[0006] Technical solution: The wetland soil stratification sampling device described in the present invention includes a sampling column, and a cutting structure is fixedly provided on the outer side of the sampling column. When sampling, the wetland soil sample taken is stratified by the cutting structure to obtain a stratified wetland soil sample.

[0007] Furthermore, the sampling column is a hollow cylindrical structure, and slits are symmetrically arranged on the sampling column, and the cutting structure can be inserted into the slits to perform layered sampling.

[0008] Furthermore, the cutting structure is fixed on the outside of the sampling column, and the cutting structure includes a cutting platform, the upper edge of the cutting platform is flush with the lower edge of the slit of the sampling column, and a cutting board is symmetrically placed above the cutting platform. The front end of the cutting board can be inserted into the slit on the side of the sampling column to layer the soil.

[0009] Furthermore, baffles are symmetrically fixed on both sides above the cutting platform, the baffles are attached to the outside of the sampling column, and a cutting plate is symmetrically arranged on both sides of the sampling column between the two baffles.

[0010] Furthermore, the width of the cutting plate is equal to the distance between the two baffles, and the length of the cutting plate is greater than half of the inner diameter of the sampling column and less than half of the length of the baffles.

[0011] Furthermore, inclined guide grooves are symmetrically provided on both sides of the lower part of the baffle plate, a rotating shaft is embedded in the guide grooves on the two baffle plates, a push plate is fixed outside the rotating shaft, the rotating shaft is fixed in the middle of the push plate, and the combination of the rotating shaft and the push plate can slide smoothly in the guide groove. During the downward sliding process, the lower edge of the push plate is tightly attached to the upper surface of the cutting platform to push the cutting plate into the slit of the sampling column.

[0012] Furthermore, when it is necessary to take multi-layer soil samples, multiple wetland soil stratification sampling devices of the present invention can be connected.

[0013] Furthermore, when multiple wetland soil stratification sampling devices are connected, the spacing between the cutting platforms can be set according to the depth of the wetland soil layer to be sampled.

[0014] The wetland soil stratification sampling device described in the present invention utilizes the forces in different directions exerted by the soil on the outside of the push plate to automatically control the movement of the push plate and the cutting plate when taking columnar stratified samples of wetland soil, thereby achieving the segmentation of the sample taken. When the wetland soil stratification sampling device of the present invention is used, when the wetland soil column is inserted downward, the columnar wetland soil sample will be completely attached to the inside of the sampling column. When the sampling is completed and the wetland soil stratification sampling device of the present invention is taken out of the wetland soil upward, the wetland soil moves downward relative to the sampling device, and the push plate pushes the cutting plate, causing the cutting plate to move inward to complete the segmentation of the columnar sample. The present invention has a simple structure and is easy to operate. It can be used for in-situ columnar sampling of wetland soil and stratify the sample while sampling.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages:

[0016] (1) The present invention does not require a complex mechanical structure and can stratify columnar soil samples while sampling.

[0017] (2) The present invention can realize multi-layer segmentation of columnar samples by simply connecting multiple layers in series up and down, and has strong scalability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a wetland soil stratification sampling device of the present invention;

[0019] Figure 2 It is a top view of a wetland soil stratification sampling device of the present invention;

[0020] Figure 3 It is a detailed schematic diagram of the cutting platform;

[0021] Figure 4 It is a schematic diagram of the structure and operation of a wetland soil stratification sampling device of the present invention.

[0022] Figure 5 It is a schematic diagram of the connection of multiple wetland soil stratification sampling devices.

[0023] Description of part numbers in the figure:

[0024] 1. Sampling column; 2. Cutting platform; 3. Rotating shaft; 4. Push plate; 5. Cutting plate; 6. Baffle; 7. Guide groove DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0026] like Figure 1 As shown in Figures 2 and 3, a wetland soil stratification sampling device according to the present invention comprises a sampling column 1, a cutting structure is fixedly provided on the outside of the sampling column 1, the sampling column 1 is a hollow cylindrical structure, and a slit is symmetrically provided on the side of the sampling column 1 at the depth to be stratified. The cutting structure is fixed on the outside of the sampling column 1, and the cutting structure comprises a cutting platform 2, the upper edge of the cutting platform 2 is flush with the lower edge of the slit of the sampling column 1, and baffles 6 are symmetrically fixed on both sides of the upper part of the cutting platform 2, and the baffles 6 are attached to the outside of the sampling column 1. A cutting plate 5 is symmetrically placed on both sides of the sampling column 1 between the two baffles 6, and the width of the cutting plate 5 is equal to the spacing between the two baffles 6, and the length is slightly larger than half of the inner diameter of the sampling column 1 and smaller than half of the length of the baffle 6. The cutting plate 5 is placed on the upper surface of the cutting platform 2, and the front end of the cutting plate 5 can be inserted into the slit on the side of the sampling column 1. After the two cutting plates 5 are inserted into the slit, they are closed to stratify the soil in the sampling column 1. Inclined guide grooves 7 are symmetrically provided on both sides of the lower part of the baffle 6. A rotating shaft 3 is embedded in the guide grooves 7 on the two baffles 6. A push plate 4 is fixedly provided outside the rotating shaft 3. The rotating shaft 3 is fixed in the middle of the push plate 4. The lower end of the push plate 4 is in contact with the cutting platform 2. The combination of the rotating shaft 3 and the push plate 4 can slide smoothly in the guide groove 7. In the process of sliding downward, the lower edge of the push plate 4 is tightly attached to the upper surface of the cutting platform 2 to push the rear end of the cutting plate 5, so that the cutting plate 5 moves along the slit into the sampling column 1.

[0027] When it is necessary to take multi-layer soil samples, multiple wetland soil stratification sampling devices can be connected. When multiple wetland soil stratification sampling devices are connected, the spacing between the cutting platforms 2 can be set according to the depth of the wetland soil layer to be sampled.

[0028] When using:

[0029] When in use, first remove the cutting board 5, and insert the lower part of the sampling device vertically downward into the wetland soil until the surface soil is flush with the cutting platform 2. Figure 4 As shown in the middle left figure, insert the cutting plate 5. Continue to press the sampling device vertically downward into the wetland soil until it reaches the preset depth. At this point, the columnar wetland soil sample will be completely attached to the inside of the sampling column 1, completing the collection of columnar non-stratified soil samples. Then lift the sampling device vertically upward, and the wetland soil will move downward relative to the sampling device. Squeezed by the soil on the push plate 4, the push plate 4 will follow the rotating shaft 3 and rotate downward along the guide groove 7, and at the same time push the cutting plate 5 into the sampling column 1 along the slit. The two cutting plates 5 are closed inside the sampling column 1, thereby completing the segmentation of the columnar sample. As shown Figure 4 As shown in the middle right picture. So far, the collection of layered soil column samples has been completed.

[0030] like Figure 5 As shown, in particular, if it is necessary to perform multi-layer segmentation of the columnar wetland soil sample, according to the depth of the soil layer to be collected, multiple sampling devices can be connected up and down by welding or the like before the sampling device is fully pressed in, and the operation of pressing the sampling device downward into the wetland soil can be repeated after the cutting plate 5 is placed.

Claims

1. A wetland soil stratification sampling device, characterized in that: It comprises a sampling column (1), wherein a cutting structure is fixedly arranged on the outer side of the sampling column (1); during sampling, the wetland soil sample taken is layered by the cutting structure to obtain a layered wetland soil sample.

2. The wetland soil stratification sampling device according to claim 1, characterized in that: The sampling column (1) is a hollow cylindrical structure, and slits are symmetrically arranged on the sampling column (1). The cutting structure can be inserted into the slits to perform layered sampling.

3. The wetland soil stratification sampling device according to claim 2, characterized in that: The cutting structure is fixed on the outside of the sampling column (1), and comprises a cutting platform (2). The upper edge of the cutting platform (2) is flush with the lower edge of the slit of the sampling column (1). A cutting plate (5) is symmetrically placed above the cutting platform (2), and the front end of the cutting plate (5) can be inserted into the slit on the side of the sampling column (1) to layer the soil.

4. The wetland soil stratification sampling device according to claim 3, characterized in that: Baffles (6) are symmetrically fixed on both sides of the cutting platform (2), the baffles (6) are attached to the outside of the sampling column (1), and a cutting plate (5) is symmetrically arranged on both sides of the sampling column (1) between the two baffles (6).

5. The wetland soil stratification sampling device according to claim 4, characterized in that: The width of the cutting plate (5) is equal to the distance between the two baffles (6), and the length of the cutting plate (5) is greater than half of the inner diameter of the sampling column (1) and less than half of the length of the baffle (6).

6. The wetland soil stratification sampling device according to claim 3, characterized in that: Both sides of the lower part of the baffle plate (6) are symmetrically provided with inclined guide grooves (7), a rotating shaft (3) is embedded in the guide grooves (7) on the two baffle plates (6), a push plate (4) is fixedly provided outside the rotating shaft (3), the rotating shaft (3) is fixed in the middle of the push plate (4), the combination of the rotating shaft (3) and the push plate (4) can slide smoothly in the guide groove (7), and in the process of sliding downward, the lower edge of the push plate (4) is closely attached to the upper surface of the cutting platform (2) to push the cutting plate (5) to move into the slit of the sampling column (1).

7. The wetland soil stratification sampling device according to any one of claims 1 to 6, characterized in that: When it is necessary to take multi-layer soil samples, a plurality of wetland soil layered sampling devices according to any one of claims 1 to 6 can be connected up and down.

8. The wetland soil stratification sampling device according to claim 7, characterized in that: When a plurality of wetland soil stratification sampling devices are connected, the spacing between the cutting platforms (2) can be set according to the depth of the wetland soil layer to be sampled.

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