An in-situ soil solution extraction and collection device

Abstract

The application belongs to the technical field of soil solution collection, and particularly relates to a soil solution in-situ extraction and collection device, which comprises a pipe body, an adjusting part and a solution sampler, the solution sampler is connected with a first suction pipe, a track column is installed in the pipe body, a T-shaped groove and an adjusting groove are axially arranged on the track column, a carrier is slidably installed in the T-shaped groove, the carrier comprises an integrated carrier table and a T-shaped block, a sliding groove and a mounting hole, which are in communication with each other, are arranged on the carrier table, a screw rod is installed in the mounting hole, a movable part is threadedly connected with the screw rod, the movable part is detachably connected with the solution sampler, a first bevel gear is installed at one end of the screw rod, a mounting seat matched with the adjusting groove is installed on the T-shaped block, a rotating shaft is installed in the mounting seat, a hexagonal sleeve and a second bevel gear are respectively installed at two ends of the rotating shaft, the second bevel gear is engaged with the first bevel gear, and the device is used to solve the problems that the original structure of soil is seriously damaged during soil sampling, it is difficult to obtain real soil solution samples, and it is difficult to maintain.

Description

Technical Field

[0001] This invention belongs to the field of soil solution collection technology, specifically relating to an in-situ extraction and collection device for soil solution. Background Technology

[0002] Soil solution is a collective term for soil moisture and its contained solutes and suspended matter, including various soluble salts, nutrients, and pollutants. As a carrier for the exchange and transport of soil with other environmental media, it regulates a series of ecological, hydrological, and biogeochemical processes within the soil sphere. The extraction and collection of soil solution is crucial for investigating the migration of pollutants in soil, soil hydrological processes, and assessing plant growth. Due to the strong spatiotemporal heterogeneity of soil moisture and properties, in-situ extraction of soil solution is particularly important. A commonly used method involves burying a porous filter head in the soil and then obtaining the soil solution under negative pressure. Installing the porous filter head primarily involves drilling holes, placing the filter head into the target soil layer, and then backfilling the soil. If it is necessary to obtain soil solution from different depths at the same sampling site, multiple samplers need to be placed in the boreholes. However, this method is time-consuming and labor-intensive, damages the original soil structure, and fails to obtain accurate soil solution samples. Furthermore, when the soil solution samplers malfunction, they interfere with each other, making maintenance difficult. Summary of the Invention

[0003] Based on the problems mentioned in the background art above, the present invention provides a soil solution in-situ extraction and collection device to solve the problems that the original soil structure is severely damaged during soil sampling, making it difficult to obtain real soil solution samples, and that the samplers interfere with each other when malfunctioning, making maintenance difficult.

[0004] The technical solution adopted in this invention is as follows:

[0005] A soil solution in-situ extraction and collection device includes a tube body, an adjusting component, and a porous medium solution sampler. The solution sampler is connected to a first suction tube. The bottom end of the tube body is closed and equipped with a positioning sleeve. A track column is installed inside the positioning sleeve. A positioning component is installed between the tube body and the track column. The track column is a prism with T-slots and adjusting slots axially formed on each side. The adjusting slot has a U-shaped cross-section. The T-slots are connected to the adjusting slots. A carrier is slidably installed inside the T-slots. The carrier includes an integrally formed platform and a T-shaped block. The platform has interconnected sliding grooves and mounting holes. A screw is installed in the mounting hole. The screw is threadedly connected to a movable component. A U-shaped traction block is fixedly installed on the movable component. The U-shaped traction block is connected to the solution sampler. The sampler is detachably connected at the tail end. A first bevel gear is installed at one end of the screw. A mounting seat matching the adjustment groove is installed on the T-block. A rotating shaft is installed inside the mounting seat. A hexagonal sleeve and a second bevel gear are respectively installed at both ends of the rotating shaft. The second bevel gear meshes with the first bevel gear. The solution sampler is located in the chute. A positioning block is detachably installed at the top of the track column at the position corresponding to the T-slot. A measuring rod is passed through the positioning block. A limiting piece is provided at the top of the measuring rod. The measuring rod is threadedly connected to the T-block. The adjustment component includes a T-shaped rod corresponding to the adjustment groove. A hexagonal prism matching the hexagonal sleeve is provided at the bottom end of the T-shaped rod. Multiple reserved holes corresponding to the positions of the T-slots are opened on the outer wall of the tube body. Each reserved hole is equally spaced along the axial direction of the tube body.

[0006] Based on the above technical solution, the present invention has made the following improvements:

[0007] Furthermore, the solution sampler includes a ceramic filter head, a connector, and a collection tube. The first suction tube is connected to the collection tube, the connector is fixedly connected to the ceramic filter head, and the connector is threadedly connected to the collection tube. A traction ring is provided at the tail end of the collection tube, and a U-shaped traction block passes through the traction ring to move the solution sampler. The ceramic filter head not only absorbs soil solution but also possesses high hardness, facilitating the insertion of the solution sampler into the soil layer. The ceramic filter head can be replaced via the connector.

[0008] Furthermore, the platform is tilted. This facilitates the concentration of the soil solution entering the solution sampler at one end, making it easier to extract.

[0009] Furthermore, a cover is installed on the tube body, comprising a lower cover and a top cover. A second suction tube corresponding to the T-slot is installed on the lower cover, and the second suction tube is used to connect to the first suction tube. Multiple collection boxes corresponding to the second suction tube are installed inside the lower cover. The top cover is installed on the lower cover and has a three-way pipe with a pressure gauge and a one-way valve. With the top cover installed, negative pressure can be simultaneously applied to multiple solution samplers. Under negative pressure, the soil solution in the collection tube is drawn out along the first and second suction tubes and enters the corresponding collection boxes without affecting each other. Without the top cover installed, negative pressure can also be applied to each solution sampler individually through the second suction tube.

[0010] Furthermore, a marker block corresponding to the position of the second suction tube is installed on the lower cover. The marker block allows for the differentiation of the second suction tubes connected to solution samplers located at different depths.

[0011] Furthermore, the top of the cover is provided with an observation window made of tempered glass, which facilitates the monitoring of soil solution collection within the collection box.

[0012] Furthermore, one end of the T-slot has an angled opening, and the positioning block has a wedge corresponding to the angled opening. When the positioning block is placed at the top of the T-slot, it can be limited by the wedge to prevent the positioning block from falling. When it is necessary to remove the positioning block, it can be pulled up, which is convenient to use.

[0013] Furthermore, the connection between the adjustment groove and the T-slot narrows towards the center. This limits the position of the adjustment component inserted into the adjustment groove, preventing large lateral movements of the adjustment component, thus ensuring that the hexagonal prism on the adjustment component corresponds to the hexagonal sleeve.

[0014] The beneficial effects of this invention are:

[0015] 1. By setting up multiple solution samplers, soil solution can be sampled at different depths. After the tube is placed into the soil layer, the solution sampler is inserted horizontally into the soil through the pre-drilled hole on the tube. The actual contact depth between the solution sampler and the soil is small, so it can be inserted directly without drilling holes and backfilling, thus not damaging the original soil structure. The porous filter head of the solution sampler inserted horizontally into the soil is at a certain distance from the tube, so the soil structure at the sampling location is not damaged by the tube. The installation of the tube does not affect the collection of soil solution.

[0016] 2. The solution sampler is inserted into the soil by a movable part, and can also be pulled out by moving the movable part, which can be used for maintenance of the solution sampler; each solution sampler is installed from a different T-slot, and each solution sampler can be maintained independently when maintenance is required, making maintenance convenient. Attached Figure Description

[0017] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0018] Figure 1 This is a longitudinal cross-sectional schematic diagram of a soil solution in-situ extraction and collection device placed after being placed in the soil layer, according to an embodiment of the present invention.

[0019] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0020] Figure 3 This is a schematic diagram of the structure of an in-situ soil solution extraction and collection device according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the cover structure in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram showing the disassembled positioning component in an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the track column structure in an embodiment of the present invention;

[0024] Figure 7 This is a top view of the track column in an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the longitudinal structure of the carrier and solution sampler in an embodiment of the present invention;

[0026] Figure 9 for Figure 8 Enlarged structural diagram at point B;

[0027] Figure 10 This is a schematic diagram of the positioning block in an embodiment of the present invention;

[0028] Figure 11 This is a schematic diagram of the connection structure between the adjusting member and the hexagonal sleeve in an embodiment of the present invention;

[0029] The symbols for the main components are explained below:

[0030] Soil layer 01, pipe body 1, positioning sleeve 11, reserved hole 12, positioning component 13, track column 2, T-slot 21, adjusting groove 22, inclined opening 23, frame 3, platform 31, T-block 311, sliding groove 32, mounting hole 33, screw 34, first bevel gear 341, movable component 35, U-shaped traction block 351, mounting seat 36, rotating shaft 37, hexagonal sleeve 371, second bevel gear 372, cover 4, lower cover 41, top cover 42, collection box 43, three-way pipe 44, pressure gauge 441, one-way valve 442, second suction pipe 45, marking block 46, solution sampler 5, ceramic filter head 51, connector 52, liquid collection pipe 53, first suction pipe 54, positioning block 55, wedge block 551, measuring rod 56, limiting piece 561, adjusting component 6, hexagonal prism 61. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] like Figure 11 As shown, a soil solution in-situ extraction and collection device includes a tube body 1, an adjusting component 6, and a porous medium solution sampler 5 for acquiring soil solution. The adjusting component 6 includes a T-shaped rod corresponding to an adjusting groove 22, and a hexagonal prism 61 matching a hexagonal sleeve 371 is provided at the bottom end of the T-shaped rod. The solution sampler 5 is connected to a first suction tube 54 for sucking out the soil solution acquired in the solution sampler 5. The bottom end of the tube body 1 is closed and provided with a positioning sleeve 11. A track column 2 is installed inside the positioning sleeve 11, and a positioning component 13 (such as...) is installed between the tube body 1 and the track column 2. Figure 2 , Figure 5 As shown in the figure, the positioning component 13, together with the positioning sleeve 11, is used to install and fix the track column 2.

[0033] like Figures 6-9As shown, the track column 2 is a prism with T-slots 21 and adjusting slots 22 axially formed on each side. The adjusting slot 22 has a U-shaped cross-section. The T-slots 21 and adjusting slots 22 are connected. A carrier 3 is slidably installed in the T-slots 21. The carrier 3 includes an integrally formed platform 31 and a T-shaped block 311. The platform 31 has interconnected sliding grooves 32 and mounting holes 33. A screw 34 is installed in the mounting holes 33. The two ends of the screw 34 are smooth rods and are installed in the mounting holes 33 through bearings. The screw 34 is threadedly connected to a movable part 35. A U-shaped traction block 351 is fixedly installed on the movable part 35. The lead block 351 is detachably connected to the tail end of the solution sampler 5. A first bevel gear 341 is installed at one end of the screw 34. A mounting seat 36 matching the adjustment groove 22 is installed on the T-shaped block 311. A rotating shaft 37 is installed inside the mounting seat 36. A hexagonal sleeve 371 and a second bevel gear 372 are respectively installed at both ends of the rotating shaft 37. The second bevel gear 372 meshes with the first bevel gear 341. When the adjusting member 6 is inserted into the adjustment groove 22 and the hexagonal sleeve 371 is rotated, the screw 34 will be driven to rotate under the action of the second bevel gear 372 and the first bevel gear 341. The rotating screw 34 will drive the movable member 35 to move.

[0034] The solution sampler 5 is located in the chute 32. A positioning block 55 is detachably installed at the top of the track column 2 at the corresponding position of the T-slot 21. A measuring rod 56 is inserted through the positioning block 55. A limiting piece 561 is provided at the top of the measuring rod 56. The measuring rod 56 is threadedly connected to the T-block 311. Multiple reserved holes 12 corresponding to the positions of the T-slot 21 are opened on the outer wall of the tube body 1. Each reserved hole 12 is set at equal intervals along the axial direction of the tube body 1. The measuring rod 56 limits the movement stroke of the carrier 3. By configuring measuring rods 56 of different sizes through the through holes, different carriers 3 can be sent to different depths corresponding to the reserved holes 12.

[0035] Specifically, the solution sampler 5 includes a ceramic filter head 51, a connector 52, and a collection tube 53. The first suction tube 54 is connected to the collection tube 53, the connector 52 is fixedly connected to the ceramic filter head 51, and the connector 52 is threadedly connected to the collection tube 53. The ceramic filter head 51 can absorb soil solution and also has high hardness, which makes it easy to insert the solution sampler 5 into the soil layer. The ceramic filter head 51 can be replaced through the connector 52. The end of the collection tube 53 is provided with a traction ring, and a U-shaped traction block 351 is inserted into the traction ring to drive the solution sampler 5 to move.

[0036] Specifically, the platform 31 is tilted to facilitate the concentration of the soil solution entering the solution sampler 5 at one end for easy extraction.

[0037] Specifically, such as Figure 4As shown, a cover 4 is installed on the tube body 1. The cover 4 includes a lower cover 41 and a top cover 42. A second suction tube 45 corresponding to the T-slot 21 is installed on the lower cover 41. The second suction tube 45 is used to connect with the first suction tube 54. Multiple collection boxes 43 corresponding to the second suction tube 45 are installed inside the lower cover 41. The top cover 42 is installed on the lower cover 41. A three-way pipe 44 is installed on the top cover 42. A pressure gauge 441 and a one-way valve 442 are installed on the three-way pipe 44. After the top cover 42 is installed, negative pressure can be drawn on multiple solution samplers 5 at the same time. Under the action of negative pressure, the soil solution in the liquid collection tube 53 is sucked out along the first suction tube 54 and the second suction tube 45 and enters into the corresponding collection box 43 without affecting each other. When the top cover 42 is not installed, negative pressure can also be drawn on each solution sampler 5 individually through the second suction tube 45. To distinguish the second suction tubes 45 connected to the solution samplers 5 at different depths, a marker block 46 corresponding to the position of the second suction tube 45 is installed on the lower cover 41. Meanwhile, to facilitate understanding of the soil solution collection in the collection box 43, an observation window made of tempered glass is provided on the top of the top cover 42.

[0038] Specifically, one end of the T-slot 21 is provided with a bevel 23, and the positioning block 55 is provided with a wedge 551 corresponding to the bevel 23 (e.g., Figure 10 (As shown). When the positioning block 55 is placed at the top of the T-slot 21, it can be limited by the wedge block 551 to prevent the positioning block 55 from falling. When it is necessary to remove the positioning block 55, simply pull the positioning block 55 up. It is easy to use.

[0039] Specifically, the connection between the adjusting groove 22 and the T-shaped groove 21 converges towards the center (e.g. Figure 7 (As shown). The adjustment piece 6 inserted into the adjustment slot 22 can be limited to prevent the adjustment piece 6 from moving laterally too much, so that the hexagonal prism 61 on the adjustment piece 6 corresponds to the hexagonal sleeve 371.

[0040] During sampling, the track post 2 is inserted into the positioning sleeve 11 and then fixed by the positioning component 13. The positioning block 55 is then fitted onto the measuring rod 56, and the measuring rod 56 is connected to the carrier frame 3. The solution sampler 5 is then placed in the chute 32 and connected to the U-shaped traction block 351 on the movable component 35. Based on the length of the measuring rod 56 and the depth of the pre-drilled hole 12 on the pipe body 1, the carrier frame 3 and the positioning block 55 are placed in the corresponding T-slot 21. As the measuring rod 56 gradually penetrates the limiting piece 561 and engages with the positioning block 55, the solution sampler 5 aligns with the pre-drilled hole 12. A hole is drilled at the sampling site according to the outer diameter of the pipe body 1, and the pipe body 1 is inserted into the soil layer 01 (e.g., ...). Figures 1-3(As shown), then use the adjusting piece 6 to insert into the adjusting groove 22 and engage with the hexagonal sleeve 371. Rotating the adjusting piece 6 will drive the second bevel gear 372 to rotate, which will drive the screw 34, which is equipped with the first bevel gear 341, to rotate. When the screw 34 rotates, it will drive the movable piece 35 to move and push the solution sampler 5 into the reserved hole and gradually insert it into the soil on the outer wall of the tube body 1. Finally, connect the first suction tube 54 and the second suction tube 45, install the lower cover 41 on the tube body 1, and after placing the collection box 43, install the top cover 42 on the lower cover 41 to draw out the negative pressure.

[0041] When maintenance is required, the solution sampler 5 is pulled out of the soil and put into the tube body 1 by adjusting the adjusting part 6 as described above. Then, the positioning block 55 is pulled to pull the carrier 3 upward from the T-slot 21.

[0042] The foregoing has provided a detailed description of the soil solution in-situ extraction and collection device provided by the present invention. The specific embodiments described are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A soil solution in-situ extraction and collection device, comprising a tube body (1), an adjusting component (6), and a porous medium solution sampler (5), wherein the solution sampler (5) is connected to a first suction tube (54), characterized in that: The bottom end of the tube (1) is closed and a positioning sleeve (11) is provided. A track column (2) is installed inside the positioning sleeve (11). A positioning component (13) is installed between the tube (1) and the track column (2). The track column (2) is a prism and has T-slots (21) and adjustment slots (22) axially opened on each side. The cross-section of the adjustment slot (22) is U-shaped. The T-slots (21) and the adjustment slots (22) are connected. A carrier (3) is slidably installed inside the T-slots (21). The carrier (3) includes an integrally formed platform (31) and a T-block (311). The platform (31) has interconnected sliding grooves (32) and mounting holes (33). A screw (34) is installed in the mounting hole (33). The screw (34) is threadedly connected to a movable part (35). A U-shaped traction block (351) is fixedly installed on the movable part (35). The U-shaped traction block (351) is detachably connected to the tail end of the solution sampler (5). A first bevel gear (341) is installed at one end of the screw (34). A mounting seat (36) matching the adjusting groove (22) is installed on the T-shaped block (311). A rotating shaft (37) is installed in the mounting seat (36). A hexagonal sleeve (371) and a second bevel gear (372) are respectively installed at both ends of the rotating shaft (37). The second bevel gear (372) meshes with the first bevel gear (341). The solution sampler (5) is located in the chute (32). The top of the track column (2) is detachably installed with a positioning block (55) at the corresponding position of the T-slot (21). A measuring rod (56) is threaded through the positioning block (55). A limiting piece (561) is provided at the top of the measuring rod (56). The measuring rod (56) is threadedly connected to the T-block (311). The adjusting component (6) includes a T-shaped rod corresponding to the adjusting groove (22). The bottom end of the T-shaped rod is provided with a hexagonal prism (61) that matches the hexagonal sleeve (371). Multiple reserved holes (12) corresponding to the positions of the T-slot (21) are opened on the outer wall of the tube body (1). Each reserved hole (12) is along the axial direction of the tube body (1). With equal spacing, the track column (2) is inserted into the positioning sleeve (11) and fixed by the positioning part (13). The positioning block (55) is placed on the measuring rod (56) and the measuring rod (56) can be connected to the carrier (3). The solution sampler (5) is placed in the slide groove (32) and can be connected to the U-shaped traction block (351) on the movable part (35). According to the length of the measuring rod (56) and the depth of the reserved hole (12) on the tube body (1), the carrier (3) and the positioning block (55) can be placed in the corresponding T-slot (21). When the measuring rod (56) gradually penetrates into the limiting piece (561) and fits with the positioning block (55), the solution sampler (5) corresponds to the reserved hole (12).Drill a hole at the sampling site according to the outer diameter of the pipe (1) and place the pipe (1) into the soil layer. Use the adjusting part (6) to insert into the adjusting groove (22) and engage with the hexagonal sleeve (371). Rotating the adjusting part (6) will drive the second bevel gear (372) to rotate, which will drive the screw (34) with the first bevel gear (341) to rotate. When the screw (34) rotates, it will drive the movable part (35) to move and push the solution sampler (5) into the reserved hole and gradually insert it into the soil on the outer wall of the pipe (1).

2. The soil solution in-situ extraction and collection device according to claim 1, characterized in that: The solution sampler (5) includes a ceramic filter head (51), a connector (52) and a collection tube (53). The first suction tube (54) is connected to the collection tube (53). The connector (52) is fixedly connected to the ceramic filter head (51). The connector (52) is threadedly connected to the collection tube (53).

3. The soil solution in-situ extraction and collection device according to claim 2, characterized in that: The platform (31) is tilted.

4. The soil solution in-situ extraction and collection device according to claim 1, characterized in that: The tube body (1) is equipped with a cover (4), which includes a lower cover (41) and a top cover (42). The lower cover (41) is equipped with a second suction tube (45) corresponding to the T-slot (21). The second suction tube (45) is used to connect with the first suction tube (54). The lower cover (41) is equipped with a plurality of collection boxes (43) corresponding to the second suction tube (45). The top cover (42) is installed on the lower cover (41). The top cover (42) is equipped with a three-way pipe (44). The three-way pipe (44) is equipped with a pressure gauge (441) and a one-way valve (442).

5. The soil solution in-situ extraction and collection device according to claim 4, characterized in that: The lower cover (41) is equipped with a marker block (46) corresponding to the position of the second suction tube (45).

6. The soil solution in-situ extraction and collection device according to claim 5, characterized in that: The top of the cover (42) is provided with an observation window made of tempered glass.

7. The soil solution in-situ extraction and collection device according to claim 1, characterized in that: The T-slot (21) has a bevel (23) at one end, and the positioning block (55) has a wedge (551) corresponding to the bevel (23).

8. The soil solution in-situ extraction and collection device according to claim 7, characterized in that: The adjustment groove (22) and the T-shaped groove (21) converge towards the center.

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