Soil leachate sampling device

Abstract

The utility model relates to the technical field of percolate sampling, and discloses a soil percolate sampling device which comprises a liquid collecting piece, a sampling piece and a sampling piece, the liquid guide pipe is placed in the liquid collecting piece, and the top end of the liquid guide pipe extends out of the top of the sampling barrel; the partition plate is placed in the liquid collecting piece; an inner cavity of the liquid collecting piece is divided into a filtering cavity and a collecting cavity by the partition plate, and the filtering cavity is located above the collecting cavity; the partition plate is provided with filtering holes for communicating the filtering cavity with the collecting cavity, and the partition plate is further provided with a first receding opening for allowing the liquid guide pipe to penetrate through; the inner diameter of the position, opposite to the filtering cavity, of the liquid collecting piece is larger than the inner diameter of the position, opposite to the collecting cavity, of the liquid collecting piece, so that the partition plate can be upwards taken out of the liquid collecting piece. According to the sampling device, the convenience of disassembling and assembling the sampling device can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of leachate sampling, and in particular to a soil leachate sampling device. Background Art

[0002] The soil leachate sampling device is a device for collecting underground soil leachate. It is usually buried underground. After a period of time, the water sample in the soil gradually seeps into the sampling device. By collecting soil leachate samples, the concentration and change trend of pollutants such as salt, heavy metals, and organic matter in the soil can be monitored to provide data support for soil pollution assessment and control.

[0003] Most of the existing soil infiltration sampling devices are connected integrated structures. For example, a Chinese patent document with publication number CN220690583U discloses an in-situ soil leachate collection device, including a sampling mechanism, a filtering mechanism and a collecting mechanism connected in sequence, wherein the filtering mechanism includes a screw-on plug, an extension tube, a filter tube and a filter plate connected in sequence, and the collecting mechanism includes a liquid collection storage device connected to the lower side of the filter plate.

[0004] According to the above-mentioned related technologies, the filter components often accumulate mud and sand impurities, but the filter components in the existing soil sampling devices are difficult to disassemble and assemble, which is not conducive to cleaning the sampling device. Utility Model Content

[0005] In order to improve the convenience of disassembly and assembly of the sampling device, the present application provides a soil leachate sampling device.

[0006] The present application provides a soil leachate sampling device, which adopts the following technical solution:

[0007] A soil leachate sampling device, comprising:

[0008] A liquid collecting member having an inner cavity opening upward;

[0009] A liquid guide tube, placed in the liquid collecting member, with its top end extending out of the top of the sampling barrel;

[0010] A partition is placed in the liquid collecting member; the partition separates the inner cavity of the liquid collecting member into a filter cavity and a collection cavity, wherein the filter cavity is located above the collection cavity; a filter hole is provided on the partition to connect the filter cavity with the collection cavity, and the partition also has a first clearance port for the liquid guiding tube to pass through;

[0011] Wherein, the inner diameter of the liquid collecting piece relative to the filter cavity is larger than the inner diameter of the liquid collecting piece relative to the collection cavity, so that the partition can be taken out upward from the liquid collecting piece.

[0012] By adopting the above technical solution, the split structure makes it easy to disassemble and assemble the liquid collecting piece and the partition, which is convenient for cleaning the sampling device and replacing parts. At the same time, the inner diameter of the liquid collecting piece at the filter cavity is larger to facilitate the drainage of moisture in the soil into the liquid collecting piece, and the inner diameter of the liquid collecting piece at the collection cavity is smaller, which is conducive to increasing the height of collecting the leachate in the collection cavity, thereby facilitating the leachate in the collection cavity to be sucked out through the liquid guide tube.

[0013] Optionally, the sampling device further comprises a filter screen, which is overlapped on the upper surface of the partition, has a mesh size smaller than the filter hole size, and has a second clearance opening for the liquid guide tube to pass through.

[0014] By adopting the above technical solution, the filter screen has a smaller pore size, which further enhances the filtering effect of the leachate and makes it difficult for sand particles to enter the collection chamber.

[0015] Optionally, the sampling device further comprises filter sand, and the filter sand is laid on the filter net to form a sand layer.

[0016] By adopting the above technical solution and laying filter sand, a multi-layer filtering structure is formed, which further improves the filtering effect.

[0017] Optionally, the catheter is detachably connected to a blocking piece for sealing the top end of the catheter.

[0018] By adopting the above technical solution, the detachable blocking piece facilitates the blocking and opening of the liquid guiding tube, and facilitates the collection and removal of liquid.

[0019] Optionally, the sampling device further comprises a liquid suction force cooperating with the top end of the liquid catheter, and the liquid suction force is used to suck out the liquid in the collection chamber through the liquid catheter.

[0020] By adopting the above technical solution, through the cooperation of the liquid suction power and the liquid guide tube, the liquid in the collection chamber can be effectively sucked out, which facilitates the collection and analysis of the liquid.

[0021] Optionally, the liquid guiding tube is fixedly attached to the inner wall of the liquid collecting member.

[0022] By adopting the above technical solution, the liquid guiding tube is fixed to the inner wall of the liquid collecting member, which helps to improve the stability of the liquid guiding tube.

[0023] Optionally, the liquid guiding tube is detachably connected to the inner wall of the liquid collecting member.

[0024] By adopting the above technical solution, the catheter can be disassembled to facilitate cleaning and replacement of the catheter.

[0025] Optionally, the sampling device further includes a support frame, which includes a collar and legs; the collar is sleeved on the outer wall of the liquid collecting member, and the liquid collecting member can be separated from the collar upward; there are a plurality of legs distributed on the collar along the circumferential direction of the collar for supporting the liquid collecting member.

[0026] By adopting the above technical solution, the liquid collecting member is supported by the support frame, improving the stability and placeability of the device.

[0027] Optionally, each leg includes a base rod and an adjusting sleeve. The base rod is connected to the collar, and the adjusting sleeve is coaxially threaded and sleeved on the base rod to adjust the extended length of the leg.

[0028] By adopting the above technical solution, the flexible adjustment of the leg length through the adjusting sleeve of the leg helps to adjust the verticality of the liquid collecting member, facilitating the use of the device in different environments.

[0029] In summary, the present application includes at least one of the following beneficial effects:

[0030] 1. Through the split structure design, the partition can be quickly loaded into or taken out of the liquid collecting member, facilitating the cleaning and reuse of the sampling device;

[0031] 2. By providing a filter screen and laying a sand layer on the partition, multi-stage filtration of soil leachate is achieved, improving the purity and accuracy of sampling. Moreover, the sand layer can increase the pressure on the filter screen and the filter plate, enhancing the stability of the filter screen and the filter plate;

[0032] 3. By providing a support frame, the liquid collecting member can be adjusted to a vertically placed state in different installation environments, improving the installation effect of the liquid collecting member. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic structural diagram of Embodiment 1 of the present application;

[0034] Figure 2 is Figure 1 a sectional view taken along line A-A in

[0035] Figure 3 is a schematic exploded structural diagram of the partition, filter screen and liquid guiding pipe in Embodiment 1 of the present application;

[0036] Figure 4 is a schematic structural diagram of the cooperation between the liquid guiding pipe and the liquid collecting member in Embodiment 2 of the present application;

[0037] Figure 5 is Figure 4 an enlarged structural diagram of part B in

[0038] Figure 6 It is a schematic structural diagram of the third embodiment of the present application;

[0039] Figure 7 It is a schematic structural diagram of the support frame in the third embodiment of the present application.

[0040] Explanation of reference numerals: 1, liquid collecting member; 2, liquid guiding pipe; 3, partition plate; 4, filtering cavity; 5, collecting cavity; 6, filter holes; 7, first relief opening; 8, filter net; 9, second relief opening; 10, sand layer; 11, plugging member; 12, support frame; 121, collar; 122, support leg; 1221, base rod; 1222, adjusting sleeve; 13, mounting seat; 14, mounting cavity; 15, locking bolt. Detailed implementation manners

[0041] The following further elaborates on the present application in conjunction with the attached Figure 1-7 drawings.

[0042] Embodiment 1:

[0043] The embodiment of the present application discloses a soil leachate sampling device. Refer to Figure 1 and Figure 2 , the soil leachate sampling device includes a liquid collecting member 1, a liquid guiding pipe 2, a partition plate 3, a filter net 8, filter sand, and a liquid suction power.

[0044] The liquid collecting member 1 is in the shape of a bucket with an upward opening. The shape of the liquid collecting member 1 can be square, circular, frustum-shaped, etc. In this embodiment, it is preferably frustum-shaped with a larger upper part and a smaller lower part, and the thickness of the liquid collecting member 1 is consistent everywhere, so that the outer diameter and inner diameter of the liquid collecting member 1 gradually increase in the upward direction. In addition, the material of the liquid collecting member 1 is PE plastic.

[0045] Refer to Figure 2 and Figure 3 , the shape of the partition plate 3 is adapted to the shape of the liquid collecting member 1. Therefore, in this embodiment, the partition plate 3 is in the shape of a disc, and the outer diameter of the partition plate 3 is larger than the minimum inner diameter of the liquid collecting member 1 and smaller than the maximum inner diameter of the liquid collecting member 1. The partition plate 3 can be placed into the inner cavity of the liquid collecting member 1 from the opening of the liquid collecting member 1, so that the outer periphery of the partition plate 3 abuts against the inner wall of the liquid collecting member 1 where the inner diameter is adapted to the outer diameter of the partition plate 3, so that the partition plate 3 is coaxially placed in the liquid collecting member 1, and the partition plate 3 is limited in the liquid collecting member 1 by its own gravity, and an upward pulling force is applied to the partition plate 3 to be able to take out the partition plate 3 upward.

[0046] The partition plate 3 divides the inner cavity of the liquid collecting member 1 into a filtering cavity 4 and a collecting cavity 5. The filtering cavity 4 is formed above the partition plate 3, and the collecting cavity 5 is formed below the partition plate 3. The partition plate 3 is arrayed with filter holes 6, and the filter holes 6 communicate the filtering cavity 4 and the collecting cavity 5. The aperture of the filter holes 6 ranges from 3 mm to 8 mm, and is preferably 5 mm in this embodiment.

[0047] The filter screen 8 is placed on the upper surface of the partition plate 3, and the mesh holes of the filter screen 8 are not shown in the figure. The shape of the filter screen 8 is the same as that of the partition plate 3. In this embodiment, the filter screen 8 is circular with an outer diameter consistent with that of the partition plate 3, so that the filter screen 8 can be superposed with the partition plate 3. The material of the filter screen 8 is a wire mesh with a certain strength and can be cut with scissors. The mesh holes of the filter screen 8 are smaller than the aperture of the filter hole 6. In this embodiment, the size of the filter screen 8 is preferably 80 mesh.

[0048] The filter sand is washed river sand. The filter sand is laid on the filter screen 8 to form a sand layer 10 on the filter screen 8, and the particle size of the filter sand is larger than the aperture of the filter hole 6. The thickness of the sand layer 10 is between 30 mm and 80 mm, and is preferably 50 mm in this embodiment. Both the filter screen 8 and the sand layer 10 are located in the filter cavity 4. The sand layer 10 provides a downward pressure on the filter screen 8 and the partition plate 3, so that the filter screen 8 and the partition plate 3 are not easily displaced relative to the liquid collecting member 1.

[0049] Refer to Figure 2 , the liquid guiding pipe 2 is in a tubular shape with both ends communicating and is made of PPR material. In this embodiment, the outer wall of the liquid guiding pipe 2 is fixed to the inner wall of the liquid collecting member 1. The length extension direction of the liquid guiding pipe 2 is the same as the inclination direction of the inner wall of the liquid collecting member 1. The bottom end of the liquid guiding pipe 2 extends into the collecting cavity 5 of the liquid collecting member 1 and is close to the inner bottom wall of the liquid collecting member 1. The top end of the liquid guiding pipe 2 extends upward out of the top end of the liquid collecting member 1.

[0050] In this embodiment, the liquid suction power is a pump body (not shown in the figure) that cooperates with the liquid guiding pipe 2. The pump body is preferably a manual vacuum pump. The pump body is connected to the liquid guiding pipe 2 through a silica gel conduit, so that the liquid in the collecting cavity 5 can be pumped out through the liquid guiding pipe 2 when the pump body is started.

[0051] Refer to Figure 2 and Figure 3 , in addition, a first relief opening 7 for making way for the liquid guiding pipe 2 and allowing the liquid guiding pipe 2 to slide through is provided at the edge of the partition plate 3, and a second relief opening 9 for making way for the liquid guiding pipe 2 and allowing the liquid guiding pipe 2 to slide through is provided at the edge of the filter screen 8, so that when the partition plate 3 and the filter screen 8 are placed into and taken out of the liquid collecting member 1, they are not easily interfered by the liquid guiding pipe 2, and both the first relief opening 7 and the second relief opening 9 are in an arc shape that can fit the outer wall of the liquid guiding pipe 2.

[0052] When the sampling device is in use, first dig a pit in the sampling area. The depth of the pit is greater than the height of the liquid collecting member 1 and less than the height of the liquid guiding pipe 2. Then bury the liquid collecting member 1 into the pit, and the top end of the liquid guiding pipe 2 extends above the ground. The water in the soil is filtered through the sand layer 10, the filter screen 8, and the partition plate 3 in sequence and then enters the collecting cavity 5 for collection. Then, a suction force is provided to the liquid guiding pipe 2 through the pump body to suck out the liquid in the collecting cavity.

[0053] Furthermore, in order to prevent the external water from easily entering the liquid collecting member 1 through the liquid guiding tube 2, a plugging member 11 is detachably connected to the top of the liquid guiding tube 2. In this embodiment, the plugging member 11 is a rubber plug inserted into the top of the liquid guiding tube 2. In other embodiments, the plugging member 11 can also be a threaded cap threadedly sleeved on the top of the plugging member 11.

[0054] The implementation principle of a soil leachate sampling device in the embodiment of the present application is as follows: when the sampling device is used, it is buried in the sampling ground, and the moisture in the soil is collected through the sand layer 10, the filter screen 8 and the partition 3 into the collection chamber 5. After a period of collection, the pump body provides suction to suck the leachate in the collection chamber 5 out through the liquid guide tube 2.

[0055] Embodiment 2:

[0056] The difference between the embodiment of the present application and the first embodiment is that, in the present embodiment, the liquid guiding tube 2 is detachably connected to the inner wall of the liquid collecting member 1 .

[0057] Reference Figure 4 and Figure 5 Specifically, in the embodiment of the present application, a mounting seat 13 is fixed on the inner wall of the liquid collecting piece 1 opposite to the collecting chamber 5, and the mounting seat 13 is a U-shaped structure with its opening facing the inner wall of the liquid collecting piece 1, so that the mounting seat 13 and the inner wall of the liquid collecting piece 1 together enclose a mounting chamber 14, and the size of the mounting chamber 14 is adapted to the size of the outer wall of the liquid guiding tube 2, and the liquid guiding tube 2 can pass through the mounting seat 13 through the mounting chamber 14.

[0058] A locking bolt 15 is threadedly moved in a direction close to and away from the liquid collecting member 1 at one end of the mounting seat 13 away from the inner wall of the liquid collecting member 1 , and a rod of the locking bolt 15 is inserted into the mounting cavity 14 .

[0059] When the catheter 2 passes through the mounting seat 13, the bolt of the rod of the locking bolt 15 is moved to be pressed against the side of the catheter 2 away from the inner wall of the liquid collecting member 1, so that the catheter 2 is positioned and clamped between the locking bolt 15 and the inner wall of the liquid collecting member 1, and the catheter 2 is installed. When the catheter 2 needs to be disassembled, the locking bolt 15 is loosened to be able to take out the catheter 2.

[0060] In addition, the distance between the bottom end of the liquid guiding tube 2 and the inner bottom wall of the liquid collecting member 1 can be adjusted by the cooperation of the locking bolt 15 and the liquid guiding tube 2. Thus, the distance between the liquid guiding tube 2 and the inner bottom wall of the liquid collecting member 1 can be increased at a sampling site with finer sand particles, so as to reduce the possibility of the liquid guiding tube 2 being blocked by sand particles deposited at the bottom of the liquid collecting member 1.

[0061] Embodiment three:

[0062] The embodiment of the present application further discloses a support frame 12, and the support frame 12 can cooperate with the liquid collecting member 1 in the first embodiment or the second embodiment.

[0063] Reference Figure 5 and Figure 6 As shown in FIGS. 1 and 2, the support frame 12 includes a collar 121 and legs 122. The collar 121 is in a circular ring shape, and the inner diameter of the collar 121 is greater than the minimum outer diameter of the liquid collecting member 1 and less than the maximum outer diameter of the liquid collecting member 1. So that the collar 121 can be coaxially sleeved on the outer wall of the liquid collecting member 1 from bottom to top, and the inner wall of the collar 121 has a rubber layer (not shown in the figure). The collar 121 can abut against the outer wall of the liquid collecting member 1 through the rubber layer, so as to improve the friction between the collar 121 and the liquid collecting member 1, and make the collar 121 not easily separated from the liquid collecting member 1 without external force.

[0064] There are a plurality of legs 122, and the plurality of legs 122 are evenly spaced along the circumferential direction of the collar 121 and installed on the collar 121, and the legs 122 extend obliquely downward along the direction away from the axis of the collar 121. Specifically, each leg 122 includes a base rod 1221 and an adjusting sleeve 1222. The base rod 1221 is in a screw shape, and one top end of the base rod 1221 is fixed on the collar 121. The adjusting sleeve 1222 is in a cylindrical shape, with a threaded groove for coaxially threadedly sleeving on the outer wall of the base rod 1221 at one end, and a hemispherical head at the other end. The adjusting sleeve 1222 moves threadedly on the collecting rod to be able to adjust the length of the leg 122.

[0065] When placing the aggregate member, it is easy to cause the liquid collecting member 1 to be skewed due to the uneven placement surface. By adjusting the length of the legs 122, the legs 122 are abutted against the placement surface to support the liquid collecting member 1, thereby improving the stability of placing the liquid collecting member 1. And when the liquid collecting member 1 is taken out, the collar 121 can be taken off from the liquid collecting member 1 and placed separately.

[0066] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A soil leachate sampling device, characterized in that: include: The liquid collecting member (1) has an inner cavity with an opening facing upward; A liquid guide tube (2) is placed in the liquid collecting member (1), with its top end extending out of the top of the liquid collecting member (1); a partition (3) placed in the liquid collecting member (1); the partition (3) separates the inner cavity of the liquid collecting member (1) into a filter cavity (4) and a collection cavity (5), wherein the filter cavity (4) is located above the collection cavity (5); a filter hole (6) for connecting the filter cavity (4) with the collection cavity (5) is provided on the partition (3), and a first clearance opening (7) for the liquid guiding tube (2) to pass through is also provided on the partition (3); The inner diameter of the liquid collecting piece (1) relative to the filter cavity (4) is greater than the inner diameter of the liquid collecting piece (1) relative to the collection cavity (5), so that the partition plate (3) can be taken out upward from the liquid collecting piece (1).

2. A soil leachate sampling device according to claim 1, characterized in that: The sampling device further comprises a filter screen (8), the filter screen (8) being superimposed on the upper surface of the partition plate (3), the mesh diameter of the filter screen (8) being smaller than the diameter of the filter hole (6), and the filter screen (8) having a second clearance opening (9) for the liquid guide tube (2) to pass through.

3. A soil leachate sampling device according to claim 2, characterized in that: The sampling device also includes filter sand, which is laid on the filter screen (8) to form a sand layer (10).

4. A soil leachate sampling device according to claim 1, characterized in that: The catheter tube (2) is detachably connected to a sealing member (11) for sealing the top end of the catheter tube (2).

5. A soil leachate sampling device according to claim 1, characterized in that: The sampling device further comprises a liquid suction force cooperating with the top end of the liquid guiding tube (2), wherein the liquid suction force is used to suck out the liquid in the collection chamber (5) through the liquid guiding tube (2).

6. A soil leachate sampling device according to claim 1, characterized in that: The liquid guiding tube (2) is fixedly attached to the inner wall of the liquid collecting member (1).

7. A soil leachate sampling device according to claim 1, characterized in that: The liquid guiding tube (2) is detachably connected to the inner wall of the liquid collecting member (1).

8. A soil leachate sampling device according to claim 1, characterized in that: The sampling device further comprises a support frame (12), the support frame (12) comprising a collar (121) and legs (122); the collar (121) is sleeved on the outer wall of the liquid collecting member (1), and the liquid collecting member (1) can be separated upward from the collar (121); a plurality of legs (122) are distributed on the collar (121) along the circumference of the collar (121), so as to support the liquid collecting member (1).

9. A soil leachate sampling device according to claim 8, characterized in that: The supporting leg (122) comprises a base rod (1221) and an adjustment sleeve (1222); the base rod (1221) is connected to the collar (121); the adjustment sleeve (1222) is coaxially threaded and sleeved on the base rod (1221) to adjust the extension length of the supporting leg (122).

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