Simulated soil leaching test device convenient for collecting layered soil samples

Abstract

The utility model belongs to a simulated soil leaching test device convenient for collecting layered soil samples. Comprising a leaching column of a split structure, the bottom of the leaching column of the split structure penetrates through a leaching column supporting unit, and a leaching solution collecting bottle is arranged at the position, corresponding to the bottom of the leaching column of the split structure, of the lower portion of the leaching column supporting unit; the leaching column is arranged to be of a split type structure, and the leaching column of the split type structure can be disassembled after a leaching test is finished, so that the position of soil in the leaching column is accurately determined, and the accuracy of an experimental result is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of soil leaching test technology, specifically a simulated soil leaching test device that facilitates the collection of stratified soil samples. Background Technology

[0002] Soil is the foundation of food crop production and the carrier of biological life. Soil fertility constrains agricultural production, and soil nutrients are a crucial indicator of soil fertility. Research on soil nutrient loss is of great significance to agricultural production. Nitrogen fertilizer leaching accounts for the largest proportion of nutrients used by crops, with a utilization rate of only 30%-35%. Excessive use of nitrogen fertilizer not only fails to achieve high yields and efficiency but also has adverse environmental impacts. In some areas, nitrogen leaching has caused nitrate pollution. Therefore, improving nitrogen fertilizer utilization and reducing nutrient loss and environmental damage is urgently needed. Furthermore, soil nutrient loss is one of the main reasons affecting fertilizer utilization. Researching effective methods for maintaining and utilizing soil nutrients is of great importance for achieving high-efficiency production, reducing negative environmental impacts, and promoting rational fertilization in modern agriculture to achieve high yields, high quality, and sustainable development.

[0003] Research on soil nutrient leaching is mainly achieved through simulation using soil leaching test devices. Currently, these devices are primarily indoor soil leaching devices, which are generally cylindrical structures with openings at the top and bottom. The upper part is used for watering to simulate rain and irrigation scenarios. Water gradually seeps from the upper part of the soil to the lower part, and the leaching solution is collected at the bottom of the device. During this process, the soil is fully saturated. However, this makes it impossible to accurately stratify the soil during the stratified soil sampling stage, further contributing to inaccurate experimental results. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a simulated soil leaching test device that facilitates the collection of stratified soil samples, thereby solving the technical problems existing in the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A simulated soil leaching test device for facilitating the collection of stratified soil samples. The test device includes a split-structure leaching column, the bottom of which passes through a leaching column support unit. A leaching solution collection bottle is provided at the lower part of the leaching column support unit, corresponding to the position of the bottom of the split-structure leaching column.

[0007] The beneficial effects of this invention are as follows: In traditional technology, after the soil is soaked in water and poured out of the leaching column, it is impossible to determine the specific position of the soil in the leaching column, thus causing inaccurate test results. This invention, by setting the leaching column as a split structure, allows the split structure of the leaching column to be disassembled after the leaching test, so as to accurately determine the position of the soil in the leaching column, thereby ensuring the accuracy of the experimental results.

[0008] Preferably, the leaching column with the split structure is composed of two semi-cavity parts. Each semi-cavity part includes a semi-circular cavity structure at the top, a semi-circular filter plate at the bottom of the semi-circular cavity structure, and a semi-conical cavity structure connected to the bottom of the semi-cylindrical cavity structure at the bottom of the semi-circular filter plate. The two semi-cavity parts are combined to form a cylindrical cavity structure with an open top. The two semi-circular filter plates form a complete circular filter plate, and the two semi-conical cavity structures form a complete funnel-shaped structure.

[0009] Preferably, there are two semi-circular cavity structures, one of which has grooves on both sides of its end face, and the other has protrusions on both sides of its end face that are adapted to the aforementioned grooves.

[0010] Preferably, there are two semi-circular filter plates, wherein the end face of one semi-circular filter plate has a Y-shaped cross-section.

[0011] Preferably, a waterproof tape layer is provided on the outside of the joint of the two semi-conical cavity structures after the two semi-cavity parts are combined.

[0012] At least one fastening clamp is provided on the outside of the semi-cavity portion.

[0013] Preferably, the bottom of the semi-conical cavity structure is provided with an arc-shaped block with external threads; after the two semi-cavity parts are combined, the two arc-shaped blocks are screwed to the drain pipe with internal threads, and the drain pipe is provided with a valve.

[0014] Preferably, the leaching column support unit includes four legs and a support surface disposed on the top of the four legs, with a support hole in the middle of the support surface; the inner diameter of the support hole is not greater than the outer diameter of the upper part of the funnel-shaped structure.

[0015] This utility model has the following advantages:

[0016] 1. This utility model is designed to simulate the leaching of field soil. It preferably adopts the method of collecting field soil in layers and then placing soil layers at different heights into the interior of the split structure leaching column for leaching test to achieve the maximum simulation of field conditions. The applicable field depth is 1 to 1.5 meters. After the leaching test is completed, the split structure leaching column can be disassembled to accurately extract the soil at the corresponding height, so as to ensure the accuracy of the test results.

[0017] 2. The present invention preferably uses two semi-circular cavity structures to form the upper part of the split structure leaching column. After the soil is soaked, it is in a semi-fluid state. By splitting the structure as described above, it is possible to accurately locate the soil at various depths, so as to ensure the accuracy of the test results.

[0018] 3. This utility model uses a fastening clamp to tightly fix the two semi-cavity parts, and further fixes them with the lower leaching solution drainage pipe, thereby ensuring that the structure between the two is firm and the connection is tight, so as to prevent the leaching solution from leaking. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the split-structure leaching column of this utility model.

[0021] Figure 2 This is a schematic diagram of the semi-circular cavity structure of this utility model.

[0022] Figure 3 This is a schematic diagram of another semi-circular cavity structure of this utility model.

[0023] Figure 4 This is a schematic diagram showing the positional relationship of the two semi-circular filter plates when they are in contact.

[0024] Figure 5 This is a schematic diagram showing the positional relationship between the leaching column support unit and the leaching solution collection bottle of this utility model.

[0025] Figure 6 This is a schematic diagram of the structure of the top of the support surface of this utility model.

[0026] In the diagram: 1. Leachate collection bottle; 2. Semi-circular cavity structure; 3. Semi-circular filter plate; 4. Semi-conical cavity structure; 5. Groove; 6. Raised strip; 7. Waterproof tape layer; 8. Fastening clamp; 9. Arc-shaped block; 10. Leachate drainage pipe; 11. Valve; 12. Support leg; 13. Support surface; 14. Support hole. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0028] The following is in conjunction with the appendix Figure 1-6 This application provides a detailed description of a simulated soil leaching test device for facilitating the collection of stratified soil samples. The device includes a split-structure leaching column, the bottom of which passes through a leaching column support unit. A leaching solution collection bottle 1 is located at the lower part of the support unit, corresponding to the bottom of the split-structure leaching column. This invention achieves precise extraction of soil layers at corresponding depths for testing after soil leaching by disassembling the split-structure leaching column. In actual use, the leaching column support unit supports the assembled split-structure leaching column. During the leaching process, the leaching solution is discharged into the leaching solution collection bottle 1 for collection and subsequent testing. The split-structure leaching column in this invention can be composed of multiple cylindrical cavities or two semi-circular cavities.

[0029] Further, see Appendix Figure 1-3The split-structure leaching column is composed of two semi-cavity sections. Each semi-cavity section includes a semi-circular cavity structure 2 at the top, a semi-circular filter plate 3 at the bottom of the semi-circular cavity structure 2, and a semi-conical cavity structure 4 connected to the bottom of the semi-cylindrical cavity structure 2 at the bottom of the semi-circular filter plate 3. The two semi-cavity sections, when combined, form a cylindrical cavity structure with an open top. The two semi-circular filter plates 3 form a complete circular filter plate, and the two semi-conical cavity structures 4 form a complete funnel-shaped structure. This invention preferably uses a combination of two semi-cavity sections. Since the soil is in a semi-fluid state after full saturation, if multiple cylindrical cavities are used to form a split-structure leaching column, the removal of a single cylindrical cavity may result in incomplete soil removal or easy mixing of adjacent soil. The semi-cavity section of this utility model includes an upper semi-circular cavity structure 2, a middle and lower semi-circular filter plate 3, and a semi-conical cavity structure 4; the two semi-cavity sections can form a complete split structure leaching column to meet the requirements of leaching test.

[0030] Further, see Appendix Figure 1-3 The semi-circular cavity structure 2 consists of two parts. One semi-circular cavity structure 2 has grooves 5 on both ends, and the other semi-circular cavity structure 2 has protrusions 6 on both ends that match the grooves 5. The fit between the grooves 5 and the protrusions 6 prevents leakage of the leaching solution during the leaching process and also serves a positioning function.

[0031] Further, see Appendix Figure 2-4 The semi-circular filter plates 3 are in pairs, one of which has a Y-shaped cross-section at its end face. One semi-circular filter plate 3 has a Y-shaped cross-section at its end face, while the other has a straight cross-section. When the two are combined, the straight section inserts into the inner wall of the Y-shaped section to form a complete circular filter plate, thus preventing debris from entering the subsequent pipeline and causing blockage. This structure also provides good positioning. The circular filter plate in this invention is made of silicone rubber, with a thickness of 5mm. The silicone rubber plate has evenly distributed filter holes with a diameter of 6mm.

[0032] Further, see Appendix Figure 1 The two semi-conical cavity structures 4, after being combined, have a waterproof tape layer 7 on the outside of their joint. This waterproof tape layer 7 prevents leakage of the leachate solution.

[0033] Further, see Appendix Figure 1 The exterior of the semi-cavity section is provided with at least one fastening clamp 8. After the two semi-cavity sections are combined, they can be fixed by the fastening clamp 8 to achieve a sturdy and reliable structure.

[0034] Further, see Appendix Figure 1-3 The bottom of the semi-conical cavity structure 4 is provided with an arc-shaped block 9 with external threads. After the two semi-cavity parts are combined, the two arc-shaped blocks 9 are screwed to the leachate drain pipe 10 with internal threads. The leachate drain pipe 10 is provided with a valve 11. While the fastening clamp 8 fixes the two semi-cavity parts, the leachate drain pipe 10 with internal threads is set to fix the two arc-shaped blocks 9 with external threads. First, the fastening clamp 8 fixes the upper part of the two semi-cavity parts, while the leachate drain pipe 10 with internal threads fixes the lower part of the two semi-cavity parts. The above fixation can make the structure between the two more solid and reliable. Second, the fastening clamp 8 essentially fixes the two semi-cavity parts macroscopically, while the leachate drain pipe 10 with internal threads can fix the two more tightly through the threaded engagement, so as to avoid the phenomenon of leachate leakage during the leaching process.

[0035] Further, see Appendix Figure 4-5 The leaching column support unit includes four legs 12 and a support surface 13 disposed on the top of the four legs 12. A support hole 14 is provided in the middle of the support surface 13; the inner diameter of the support hole 14 is not greater than the outer diameter of the upper part of the funnel-shaped structure. The above arrangement can achieve a stable support for the split-structure leaching column.

[0036] The specific working process of this utility model is as follows: Two semi-cavity sections are assembled into a split-structure leaching column. Specifically, the protruding strip 6 cooperates with the corresponding groove 5, and the two semi-circular filter plates 3 are combined into a circular filter plate. Then, the two semi-cavity sections are fixed by a fastening clamp 8. Next, the two externally threaded arc-shaped blocks 9 are threaded together and tightened through an internally threaded leaching solution drainage pipe 10. Finally, a waterproof tape layer 7 is laid on the outside of the joint of the two semi-conical cavity structures 4. After the above process is completed, the split-structure leaching column is solid and stable. After assembling the split-structure leaching column, Vaseline is applied to the inner wall of the leaching column. To avoid the wall-adhering effect, gauze or quartz sand is laid on the upper part of the seepage holes of the leaching column before filling the test soil into the leaching column and compacting it during filling. During the filling process, soil from different depths in the field is preferably restored to the corresponding height of the leaching column. Water and fertilizer can also be added as needed to conduct the leaching test. After the leaching test, the threaded leaching drain pipe 10, the fastening clamp 8, and the waterproof tape layer 7 can be disassembled, and the two semi-cavities can be separated. Soil samples from different depths can then be collected layer by layer according to the test requirements for analysis. This invention also features easy cleaning. In actual use, the semi-circular cavity structure is made of transparent material, and graduations can be set on its upper part to facilitate soil filling and removal.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A simulated soil leaching test apparatus for facilitating the collection of stratified soil samples, characterised in that: The experimental apparatus includes a split-structure leaching column, the bottom of which passes through a leaching column support unit. A leaching solution collection bottle (1) is located at the lower part of the leaching column support unit and at a position corresponding to the bottom of the split-structure leaching column.

2. The simulated soil leaching test device for facilitating the collection of layered soil samples according to claim 1, wherein: The split-structure leaching column is composed of two semi-cavity sections. The semi-cavity part includes a semi-circular cavity structure (2) set in the upper part, a semi-circular filter plate (3) is provided in the lower part of the semi-circular cavity structure (2), and a semi-conical cavity structure (4) connected to the bottom of the semi-circular cavity structure (2) is provided in the lower part of the semi-circular filter plate (3). The two semi-cavity parts are combined to form a cylindrical cavity structure with an open top. The two semi-circular filter plates (3) form a complete circular filter plate, and the two semi-conical cavity structures (4) form a complete funnel-shaped structure.

3. The simulated soil leaching test apparatus for facilitating collection of stratified soil samples according to claim 2, wherein: The semi-circular cavity structure (2) consists of two parts. One of the semi-circular cavity structures (2) has grooves (5) on both sides of its end face, and the other semi-circular cavity structure (2) has protrusions (6) on both sides of its end face that are adapted to the aforementioned grooves (5).

4. The simulated soil leaching test device for facilitating the collection of stratified soil samples according to claim 2, wherein: There are two semi-circular filter plates (3), one of which has a Y-shaped cross-section at the end face.

5. The simulated soil leaching test apparatus for facilitating collection of stratified soil samples according to claim 2, wherein: The two semi-conical cavity structures (4) after the two semi-cavity parts are combined are provided with a waterproof tape layer (7) at the joint.

6. A simulated soil leaching test apparatus for facilitating the collection of stratified soil samples according to any one of claims 2 to 5, characterised in that: At least one fastening clamp (8) is provided on the outside of the semi-cavity part.

7. The simulated soil leaching test apparatus for facilitating collection of stratified soil samples according to claim 6, wherein: The bottom of the semi-conical cavity structure (4) is provided with an arc-shaped block (9) with external threads; After the two semi-cavity parts are combined, the two arc-shaped blocks (9) are screwed to the leaching solution drain pipe (10) with internal threads. The leaching solution drain pipe (10) is equipped with a valve (11).

8. The simulated soil leaching test device for facilitating the collection of stratified soil samples according to claim 2, characterized in that: The leaching column support unit includes four legs (12) and a support surface (13) provided on the top of the four legs (12), and a support hole (14) is provided in the middle of the support surface (13). The inner diameter of the support hole (14) is not greater than the outer diameter of the upper part of the funnel-shaped structure.

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