Wetland soil sampling device

Abstract

The utility model relates to the technical field of wetland soil sampling, in particular to a wetland soil sampling device which comprises an inner cylinder, an outer cylinder, a piston, a push rod, a cutting locking structure and an inflating structure, the inner cylinder is arranged on the inner side of the outer cylinder, the inner cylinder and the outer cylinder are coaxially arranged, the upper end of the outer cylinder is closed, and the piston is arranged on the piston. The push rod movably penetrates through the middle of the upper end of the outer cylinder and extends into the inner cylinder, the piston is arranged in the inner cylinder in a sliding mode and fixed to the lower end of the push rod, the lower end of the inner cylinder is located on the inner side of the outer cylinder, and the space between the lower end of the inner cylinder and the outer cylinder is closed. The cutting locking structure comprises air bags and first cutting blades, the at least three air bags are distributed on the inner side of the outer cylinder in an annular array mode in an up-down staggered mode, one sides of the air bags are fixedly connected with the inner wall of the outer cylinder, the first cutting blades are fixed to the other sides of the air bags, and one ends of the first cutting blades are rotationally arranged. And the air inflation structure is used for inflating the air bag.

Description

Technical Field

[0001] The utility model relates to the technical field of wetland soil sampling, and more specifically, to a device for wetland soil sampling. Background Art

[0002] Wetlands are unique and important biological habitats within Earth's ecosystems, formed by the interaction of water and land. They are also one of the most biodiverse natural ecological landscapes. They play a crucial role in preventing floods, regulating runoff, improving climate, controlling pollution, beautifying the environment, and maintaining regional ecological balance, earning them the nickname "Nature's Kidneys." Wetland soil research is an indispensable component of wetland research, and this requires soil collection, which is where a wetland soil sampler comes in.

[0003] The wetland soil samplers in the patents with announcement numbers CN203241261 U and CN102749220B both use a method of rotating and cutting inner and outer tubes for sampling. The wetland soil sampler in CN203241261 U is not convenient for soil to enter during soil sampling, and both wetland soil samplers cannot be completely sealed. The wetland soil has a high water content, and the non-complete sealing of the sampler will cause water to be lost and take away the soil sample, and will have a great impact on the stratification of the soil sample. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings, the utility model aims to provide a wetland soil sampling device that can solve the above-mentioned problems.

[0005] A device for sampling wetland soil comprises an inner cylinder, an outer cylinder, a piston, a push rod, a cutting and locking structure, and an inflation structure. The inner cylinder is arranged on the inner side of the outer cylinder, and the inner cylinder and the outer cylinder are arranged coaxially. The upper end of the outer cylinder is closed. The push rod movably passes through the middle of the upper end of the outer cylinder and extends into the interior of the inner cylinder. The piston is slidably arranged in the inner cylinder and fixed to the lower end of the push rod. The lower end of the inner cylinder is located on the inner side of the outer cylinder, and the lower end of the inner cylinder and the outer cylinder are sealed.

[0006] The cutting locking structure includes an airbag and a first cutting blade. At least three airbags are arranged in a circular array and are staggered up and down on the inner side of the outer tube. One side of the airbag is fixedly connected to the inner wall of the outer tube, and the other side is fixed with the first cutting blade. One end of the first cutting blade is rotatably set.

[0007] The inflatable structure is used to inflate the airbag.

[0008] Furthermore, a sealing bottom plate is provided between the lower end of the inner cylinder and the outer cylinder, a rotating shaft is provided on the bottom surface of the sealing bottom plate, and the first cutting blade is rotatably connected to the rotating shaft.

[0009] Furthermore, the inflation structure includes an air pump, an annular inflation tube, a connecting tube and an inflation branch tube. The air pump is fixed to the outer side of the upper part of the outer tube. The annular inflation tube is arranged between the outer tube and the inner tube. The connecting tube passes through the outer tube to connect the air pump and the annular inflation tube. The inflation branch tube passes through the sealing bottom plate to connect the annular inflation tube and the airbag.

[0010] Furthermore, an air release valve is provided on the connecting pipe.

[0011] Furthermore, the first cutting edge is an arc-shaped structure protruding toward the middle of the outer tube, and the side of the airbag connected to the first cutting edge is an arc-shaped structure adapted to the first cutting edge.

[0012] Furthermore, a return spring is provided on the side of the first cutting edge away from the rotating shaft, one end of the return spring is fixedly connected to the first cutting edge, and the other end is fixed to the inner wall of the outer tube and the end of the airbag away from the rotating shaft.

[0013] Furthermore, the piston is a sealing piston.

[0014] Furthermore, a first through hole and a second through hole communicating with the inner tube are provided at the upper end of the outer tube, a one-way air outlet valve is installed in the first through hole, and a plug is detachably provided in the second through hole.

[0015] Furthermore, the lower end of the outer cylinder has a plurality of drill teeth in an annular array.

[0016] Furthermore, the drill tooth has an inverted triangular structure, and a second cutting edge is provided on the edge of the drill tooth.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The device for sampling wetland soil in the present invention is provided with a cutting locking structure, and the outer cylinder and the inner cylinder penetrate into the wetland soil for sampling. The wetland soil enters the inner cylinder, and the volume of the airbag is increased by inflating the airbag. In addition, since a first cutting edge is provided, the first cutting edge horizontally cuts the wetland soil or plant roots, etc., which facilitates the inflation of the airbag. After the airbag is inflated, the multiple airbags completely cover the inner side of the outer cylinder in the horizontal direction and squeeze each other in the vertical direction, thereby forming a sealing structure on the inner side of the outer cylinder, effectively preventing the wetland soil and water from flowing out, and ensuring the sampling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the wetland soil sampling device in an embodiment of the utility model.

[0021] Figure 2 It is a schematic diagram of the overall structure of the wetland soil sampling device in an embodiment of the utility model from another perspective.

[0022] Figure 3 It is a partial structural diagram of a device for sampling wetland soil in an embodiment of the utility model.

[0023] Figure 4 It is a bottom view of the wetland soil sampling device in the initial state in the embodiment of the present utility model.

[0024] Figure 5 It is a bottom view of the cutting and locking structure of the wetland soil sampling device in the embodiment of the utility model in a closed state.

[0025] Figure 6 yes Figure 1 Enlarged view of point A in the middle.

[0026] Figure 7 yes Figure 2 Enlarged view of point B in the middle.

[0027] In the figure: 1. Inner tube; 2. Outer tube; 3. Push rod; 4. Airbag; 5. First cutting edge; 6. Sealing base plate; 7. Rotating shaft; 8. Air pump; 9. Annular inflation tube; 10. Connecting tube; 11. Inflation branch tube; 12. Air release valve; 13. Return spring; 14. One-way air outlet valve; 15. Plug; 16. Drill teeth; 17. Second cutting edge; 18. Convex plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] like Figure 1 、 Figure 2 and Figure 3 As shown, the wetland soil sampling device in this embodiment includes an inner cylinder 1, an outer cylinder 2, a piston, a push rod 3, a cutting locking structure and an inflation structure. The inner cylinder 1 is arranged on the inner side of the outer cylinder 2, and the inner cylinder 1 and the outer cylinder 2 are coaxially arranged. The upper end of the outer cylinder 2 is closed, and the push rod 3 movably passes through the middle of the upper end of the outer cylinder 2 and extends to the inside of the inner cylinder 1. The piston is slidably arranged in the inner cylinder 1 and fixed to the lower end of the push rod 3. The lower end of the inner cylinder 1 is located on the inner side of the outer cylinder 2, and the lower end of the inner cylinder 1 and the outer cylinder 2 are sealed.

[0030] In this embodiment, if Figure 4 and Figure 5 As shown, the cutting locking structure includes an airbag 4 and a first cutting edge 5. The three airbags 4 are arranged in a circular array in the horizontal direction and staggered vertically on the inner side of the outer tube 2. One side of the airbag 4 is fixedly connected to the inner wall of the outer tube 2, and the other side is fixed with the first cutting edge 5. The first cutting edge 5 is rotatably arranged on the inner side of the outer tube 2 along one end. Specifically, as shown in FIG. Figure 7 As shown, a sealing bottom plate 6 is disposed between the lower end of the inner tube 1 and the outer tube 2. A rotating shaft 7 is disposed on the bottom surface of the sealing bottom plate 6. One end of the first cutting edge 5 is rotatably connected to the rotating shaft 7. Preferably, a convex plate 18 corresponding to the height of the two airbags 4 of lower height is disposed at the position of the sealing bottom plate 6 opposite to the two airbags 4 of lower height, thereby reducing the distance between the sealing bottom plate 6 and the corresponding airbags 4.

[0031] In this embodiment, the first cutting edge 5 is an arc-shaped structure that protrudes toward the center of the outer tube 2. The side of the airbag 4 connected to the first cutting edge 5 is also an arc-shaped structure that matches the first cutting edge 5. When the airbag 4 is inflated, the airbag 4 assumes a triangular structure. A return spring 13 is provided on the side of the first cutting edge 5 away from the rotating shaft 7. One end of the return spring 13 is fixedly connected to the first cutting edge 5, and the other end is fixed to the inner wall of the outer tube 2 and the end of the airbag 4 away from the rotating shaft 7. When the airbag 4 is inflated, the first cutting edge 5 rotates, stretching the return spring 13. When the airbag 4 is deflated, the first cutting edge 5 is reset by the return spring 13.

[0032] In this embodiment, the inflation structure includes an air pump 8, an annular inflation tube 9, a connecting tube 10, and an inflation branch 11. The air pump 8 is fixed to the upper outer portion of the outer tube 2. The annular inflation tube 9 is disposed between the outer tube 2 and the inner tube 1. The connecting tube 10 passes through the outer tube 2 to connect the air pump 8 and the annular inflation tube 9. The inflation branch 11 passes through the sealing base plate 6 to connect the annular inflation tube 9 with the airbag 4. The annular inflation tube 9, the connecting tube 10, and the inflation branch 11 are preferably rigid tubes. A deflation valve 12 is provided on the connecting tube 10 to facilitate deflation after use. A pressure gauge may also be provided on the connecting tube 10 to measure the air pressure within the connecting tube 10, thereby determining the inflation status of the airbag 4.

[0033] In this embodiment, the piston is a sealed piston. The upper end of the outer tube 2 is provided with a first through hole and a second through hole communicating with the inner tube 1. The first through hole is provided with a one-way air outlet valve 14, and the second through hole is provided with a detachable plug 15. Figure 6 As shown, a plurality of drill teeth 16 are provided in an annular array at the lower end of the outer cylinder 2 . The drill teeth 16 are in an inverted triangular structure, and a second cutting edge 17 is provided on the edge of the drill teeth 16 .

[0034] The working principle of the wetland soil sampling device in this embodiment is:

[0035] During use, the outer tube 2 is vertically inserted or pressed into the wetland soil. The drill teeth 16 and the second cutting edge 17 can cut the plant roots and soil during the downward movement of the outer tube 2 for sampling. During the downward pressing of the outer tube 2, the wetland soil sample enters the inner tube 1, and the extrusion piston moves upward relative to the inner tube 1. The air between the piston and the top of the outer tube 2 is discharged through the one-way air outlet valve 14. After the outer tube 2 reaches the sampling position, the air pump 8 is turned on to inflate the air bag 4. After sealing the inner tube 1, the outer tube 2 is lifted, the plug 15 is removed, the air release valve 12 is opened, the air bag 4 is deflated, and the push rod 3 is pushed. The piston pushes the wetland soil sample out of the inner tube 1, and the sampling is completed.

[0036] By setting a cutting locking structure, the outer cylinder 2 and the inner cylinder 1 penetrate into the wetland soil for sampling, and the wetland soil enters the inner cylinder 1. By inflating the airbag 4, the volume of the airbag 4 is increased, and because the first cutting edge 5 is provided, the first cutting edge 5 horizontally cuts the wetland soil or plant roots, etc., which is convenient for inflation of the airbag 4. After the airbag 4 is inflated, multiple airbags 4 completely cover the inner side of the outer cylinder 2 in the horizontal direction and squeeze each other in the vertical direction, thereby forming a sealing structure on the inner side of the outer cylinder 2, effectively preventing the wetland soil and water from flowing out, and ensuring the sampling effect.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A device for sampling wetland soil, characterized in that: The invention comprises an inner tube (1), an outer tube (2), a piston, a push rod (3), a cutting locking structure and an inflation structure, wherein the inner tube (1) is arranged inside the outer tube (2), and the inner tube (1) and the outer tube (2) are coaxially arranged, the upper end of the outer tube (2) is closed, the push rod (3) movably passes through the middle of the upper end of the outer tube (2) and extends to the inside of the inner tube (1), the piston is slidably arranged in the inner tube (1) and fixed to the lower end of the push rod (3), the lower end of the inner tube (1) is located inside the outer tube (2), and the lower end of the inner tube (1) and the outer tube (2) are closed; The cutting locking structure comprises an airbag (4) and a first cutting blade (5), wherein at least three airbags (4) are arranged in a circular array and staggered up and down on the inner side of the outer cylinder (2), one side of the airbag (4) is fixedly connected to the inner wall of the outer cylinder (2), and the other side is fixed with the first cutting blade (5), and one end of the first cutting blade (5) is rotatably arranged; The inflatable structure is used to inflate the airbag (4).

2. The wetland soil sampling device according to claim 1, characterized in that: A sealing bottom plate (6) is provided between the lower end of the inner cylinder (1) and the outer cylinder (2), a rotating shaft (7) is provided on the bottom surface of the sealing bottom plate (6), and the first cutting blade (5) is rotatably connected to the rotating shaft (7).

3. The wetland soil sampling device according to claim 2, characterized in that: The inflation structure comprises an air pump (8), an annular inflation tube (9), a connecting tube (10) and an inflation branch tube (11); the air pump (8) is fixed to the outer side of the upper portion of the outer tube (2); the annular inflation tube (9) is arranged between the outer tube (2) and the inner tube (1); the connecting tube (10) passes through the outer tube (2) to connect the air pump (8) and the annular inflation tube (9); the inflation branch tube (11) passes through the sealing bottom plate (6) to connect the annular inflation tube (9) and the airbag (4).

4. The wetland soil sampling device according to claim 3, characterized in that: The connecting pipe (10) is provided with an air release valve (12).

5. The wetland soil sampling device according to claim 4, characterized in that: The first cutting edge (5) is an arc-shaped structure protruding toward the middle of the outer tube (2), and the side of the air bag (4) connected to the first cutting edge (5) is an arc-shaped structure adapted to the first cutting edge (5).

6. The wetland soil sampling device according to claim 5, characterized in that: A return spring (13) is provided on the side of the first cutting blade (5) away from the rotating shaft (7), one end of the return spring (13) is fixedly connected to the first cutting blade (5), and the other end is fixed to the inner wall of the outer tube (2) and the end of the airbag (4) away from the rotating shaft (7).

7. The wetland soil sampling device according to claim 1, characterized in that: The piston is a sealing piston.

8. The wetland soil sampling device according to claim 7, characterized in that: The upper end of the outer tube (2) is provided with a first through hole and a second through hole which are in communication with the inner tube (1); the first through hole is provided with a one-way air outlet valve (14); and the second through hole is provided with a detachable plug (15).

9. The wetland soil sampling device according to claim 1, characterized in that: The lower end of the outer cylinder (2) is provided with a plurality of drill teeth (16) in an annular array.

10. The wetland soil sampling device according to claim 9, characterized in that: The drill tooth (16) is in an inverted triangular structure, and a second cutting edge (17) is provided on the edge of the drill tooth (16).

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