Multi-layer fixed-depth underground water sampling device for underground hydrographic survey

Abstract

The invention discloses a multi-layer fixed-depth underground water sampling device for underground hydrographic survey, and relates to the field of underground water sampling, the multi-layer fixed-depth underground water sampling device for underground hydrographic survey comprises a support frame, the support frame is rotatably connected with a mounting pipe, and according to the multi-layer fixed-depth underground water sampling device for underground hydrographic survey, graduated scale marking lines are arranged on a pipeline; and the installation box can be accurately controlled to be lowered to the designated depth of underground water. And after the target depth is reached, the specific air inlet pipe is opened by pulling the valve mechanism, and the transmission mechanism is pushed by the blowing mechanism, so that the water pumping plate moves in the water suction box to complete water pumping. Each water suction box corresponds to a specific depth, underground water of different depths can be sampled in sequence, and the problem that water samples of different depths are difficult to accurately obtain in a traditional sampling mode is solved. Moreover, the whole sampling process is relatively simple and convenient to operate, complex equipment does not need to be repeatedly mounted and dismounted, multi-layer fixed-depth sampling can be completed at a time, and the sampling efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to groundwater sampling technology, specifically to a multi-layer, fixed-depth groundwater sampling device for groundwater hydrological surveys. Background Technology

[0002] In groundwater surveying, accurately obtaining groundwater samples at different depths is crucial, as this data is essential for understanding the distribution, movement patterns, and quality characteristics of groundwater. However, existing groundwater sampling techniques have many limitations and are insufficient to meet practical surveying needs.

[0003] Traditional groundwater sampling methods typically employ single-depth sampling equipment, obtaining water samples from only a specific depth at a time. To obtain groundwater samples from different depths, it is necessary to repeatedly install and disassemble the sampling equipment, performing sampling operations at different depth locations. This process is not only tedious and complex, consuming a significant amount of time and manpower, but also susceptible to interference from external environmental factors due to frequent installation and disassembly, thus affecting the accuracy and reliability of the sampling results.

[0004] In summary, existing groundwater sampling technologies struggle to accurately obtain water samples from different depths, suffer from cumbersome sampling processes, and result in low sampling efficiency, failing to meet the high-efficiency sampling requirements of modern groundwater surveying. Therefore, developing a novel groundwater sampling device capable of addressing these issues is of significant practical importance. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-layer, fixed-depth groundwater sampling device for groundwater hydrological surveys, in order to solve the problem of low sampling efficiency in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-layer fixed-depth groundwater sampling device for groundwater hydrological survey, comprising a support frame, an installation pipe rotatably connected to the support frame, a take-up roller fixedly connected to the outer surface of the installation pipe, a pipe provided on the take-up roller, an installation box fixedly connected to one end of the pipe, a plurality of air inlet pipes fixedly connected to the outer surface of the installation box, a valve mechanism provided on the air inlet pipe, the valve mechanism being used to open and close the air inlet pipe, a transmission box fixedly connected to one end of the air inlet pipe, a water suction box connected to one side of the transmission box, the water suction box being bolted to the transmission box, and a scale marking line provided on the pipe;

[0007] A water-drawing plate is slidably connected inside the water-absorbing tank. A connecting bolt is fixedly connected to one side of the water-drawing plate. One end of the connecting bolt is connected to a transmission rod that is slidably connected to the transmission box. The connecting bolt and the transmission rod are threaded together. A transmission mechanism connected to the transmission box is fixedly connected to one side of the transmission rod. The transmission mechanism is used to drive the transmission rod to move.

[0008] Furthermore, the valve mechanism includes an opening and closing box fixedly connected to the air intake pipe, a first sealing plate slidably connected inside the opening and closing box, rubber sealing rings fixedly connected to both sides of the first sealing plate, and a pull rope slidably connected to the pipe fixedly connected to the top of the first sealing plate, the pull rope being engraved with numerical markings.

[0009] Furthermore, the transmission mechanism includes a push plate slidably connected to the transmission box, a first transmission rack fixedly connected to one side of the push plate, a transmission gear rotatably connected to the transmission box meshing with one side of the first transmission rack, a second transmission rack meshing with one side of the transmission gear, a transmission plate fixedly connected to one side of the second transmission rack, and a transmission rod fixedly connected to one side of the transmission plate.

[0010] The mounting box is equipped with an air blowing mechanism connected to the support frame, which is used to drive the push plate to move.

[0011] Furthermore, the air blowing mechanism includes an air extrusion box fixedly connected to a support frame, a push column slidably connected to the air extrusion box, an extrusion plate slidably connected to one end of the push column, a first connecting pipe fixedly connected to the top of the air extrusion box, a second connecting pipe rotatably connected to an installation pipe fixedly connected to one end of the first connecting pipe, and a third connecting pipe fixedly connected to a pipeline on the outer surface of the installation pipe.

[0012] Furthermore, a sealing block that is slidably connected to the water suction tank is fixedly connected to one side of the water suction plate.

[0013] Furthermore, a connecting rod is fixedly connected to one side of the sealing block, and a second sealing plate is fixedly connected to one end of the connecting rod.

[0014] Furthermore, a conical block is fixedly connected to the bottom of the mounting box, and a rotating handle is fixedly connected to one side of the mounting tube.

[0015] Furthermore, a fixing plate is fixedly connected to the bottom of the support frame, and a fixing hole is provided on the fixing plate.

[0016] Compared with the prior art, the multi-layer fixed-depth groundwater sampling device for groundwater hydrological survey provided by the present invention has the following beneficial effects:

[0017] By setting graduated markings on the pipeline, the descent of the installation box to the designated depth in the groundwater can be precisely controlled. Once the target depth is reached, a valve mechanism is pulled to open a specific air inlet pipe. Then, an air-blowing mechanism drives a transmission mechanism, causing the pumping plate to move within the suction tank to complete the pumping operation. Each suction tank corresponds to a specific depth, allowing for sequential sampling of groundwater at different depths. This avoids the problem of traditional sampling methods failing to accurately obtain water samples at different depths. Furthermore, the entire sampling process is relatively simple to operate, eliminating the need for repeated installation and disassembly of complex equipment. Multiple layers of fixed-depth sampling can be completed in a single operation, significantly improving sampling efficiency. This provides richer and more accurate sample data for groundwater hydrological surveys, contributing to a deeper understanding of groundwater distribution and characteristics.

[0018] After sampling, unscrew the suction tank from the transmission box, and simultaneously detach the connecting bolts from the transmission rod and connecting rod, allowing for easy and thorough cleaning of the inside of the suction tank. After cleaning, screw the suction tank back onto the transmission box and tighten the connecting bolts into the transmission rod for secure connection; the device is then ready for reuse. This design allows the sampling device to be reused multiple times, avoiding the waste of replacing the entire set of equipment after each sampling, effectively reducing sampling costs. Simultaneously, it reduces the environmental impact of frequent equipment disposal, aligning with the principles of resource conservation and sustainable development. This is of great significance for long-term groundwater hydrological surveys, being both economical and environmentally friendly. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a first perspective view of the external structure of the present invention;

[0021] Figure 2 This is a second perspective view of the external structure of the present invention;

[0022] Figure 3 This is a perspective view of the internal structure of the air intake pipe, transmission box, and water suction box of the present invention.

[0023] Figure 4 This is a perspective view of the internal structure of the extrusion box of the present invention;

[0024] Figure 5 For the present invention Figure 3 A magnified view of A in the middle.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Support frame; 2. Mounting pipe; 3. Take-up roller; 4. Pipe; 5. Mounting box; 6. Air inlet pipe; 7. Transmission box; 8. Water suction box; 9. Scale markings; 10. Water suction plate; 11. Connecting bolt; 12. Transmission rod; 21. Opening and closing box; 22. First sealing plate; 23. Rubber sealing ring; 24. Pull rope; 31. Push plate; 32. First transmission rack; 33. Transmission gear; 34. Second transmission rack; 35. Transmission plate; 41. Extrusion box; 42. Push column; 43. Extrusion plate; 44. First connecting pipe; 45. Second connecting pipe; 46. Third connecting pipe; 51. Sealing block; 52. Connecting rod; 53. Second sealing plate; 61. Conical block. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Example 1

[0029] Please see Figures 1 to 5 As shown, the present invention provides a multi-layer fixed-depth groundwater sampling device for groundwater hydrological survey, including a support frame 1, an installation pipe 2 rotatably connected to the support frame 1, a winding roller 3 fixedly connected to the outer surface of the installation pipe 2, a pipe 4 provided on the winding roller 3, the pipe being a flexible pipe, an installation box 5 fixedly connected to one end of the pipe 4, a plurality of air inlet pipes 6 fixedly connected to the outer surface of the installation box 5, a valve mechanism provided on the air inlet pipes 6 for opening and closing the air inlet pipes 6, a transmission box 7 fixedly connected to one end of the air inlet pipes 6, a water suction box 8 connected to one side of the transmission box 7, the water suction box 8 and the transmission box 7 being threadedly connected, and a scale mark 9 provided on the pipe 4;

[0030] A water suction plate 10 is slidably connected inside the water suction tank 8. A connecting bolt 11 is fixedly connected to one side of the water suction plate 10. One end of the connecting bolt 11 is connected to a transmission rod 12 that is slidably connected to the transmission box 7. The connecting bolt 11 and the transmission rod 13 are threaded together. A transmission mechanism connected to the transmission box 7 is fixedly connected to one side of the transmission rod 12. The transmission mechanism is used to drive the transmission rod 12 to move.

[0031] The valve mechanism includes an opening and closing box 21 fixedly connected to the air intake pipe 6. A first sealing plate 22 is slidably connected inside the opening and closing box 21. Rubber sealing rings 23 are fixedly connected to both sides of the first sealing plate 22. A pull rope 24 slidably connected to the pipe 4 is fixedly connected to the top of the first sealing plate 22. The pull rope 24 is installed with a slack to prevent the pull rope from moving when the pipe rotates, which would cause the pull rope 24 to move the first sealing plate 22. The pull rope 24 is engraved with numbers. It makes tight contact with the side wall of the opening and closing box 21 through the rubber sealing rings 23 on the first sealing plate 22, thereby sealing both ends of the air intake pipe 6. At the same time, a rubber sealing ring is provided at the sliding connection between the first sealing plate 22 and the opening and closing box 21 to seal the sliding part.

[0032] The transmission mechanism includes a push plate 31 that is slidably connected to the transmission box 7. A first transmission rack 32 is fixedly connected to one side of the push plate 31. A transmission gear 33 that is rotatably connected to the transmission box 7 is meshed with one side of the first transmission rack 32. A second transmission rack 34 is meshed with one side of the transmission gear 33. A transmission plate 35 is fixedly connected to one side of the second transmission rack 34. One side of the transmission plate 35 is fixedly connected to the transmission rod 12.

[0033] The mounting box 5 is equipped with an air blowing mechanism connected to the support frame 1. The air blowing mechanism is used to drive the push plate 31 to move.

[0034] The air blowing mechanism includes an air extrusion box 41 fixedly connected to the support frame 1, a push column 42 slidably connected to the air extrusion box 41, an extrusion plate 43 slidably connected to one end of the push column 42, a first connecting pipe 44 fixedly connected to the top of the air extrusion box 41, a second connecting pipe 45 rotatably connected to the mounting pipe 2 fixedly connected to one end of the first connecting pipe 44, and a third connecting pipe 46 fixedly connected to the pipe 4 on the outer surface of the mounting pipe 2.

[0035] A sealing block 51 is fixedly connected to one side of the water pump plate 10 and is slidably connected to the water suction box 8. The sealing block 51 seals the water inlet of the water suction box.

[0036] A connecting rod 52 is fixedly connected to one side of the sealing block 51, and a second sealing plate 53 is fixedly connected to one end of the connecting rod 52.

[0037] A conical block 61 is fixedly connected to the bottom of the mounting box 5, and a rotating handle is fixedly connected to one side of the mounting tube 2.

[0038] A fixing plate is fixedly connected to the bottom of the support frame 1, and fixing holes are provided on the fixing plate.

[0039] First, fix the support frame 1 at the water intake position. Then, rotate the installation pipe 2, which drives the winding roller 3 to rotate. The winding roller 3 releases the pipe 4, causing the installation box 5 to move downwards. Then, observe the scale mark 9 on the pipe 4. When the installation box 5 falls to the specified depth for groundwater detection, pull the corresponding numbered pull rope 24 upwards to disengage the first sealing plate 22 from the opening and closing box 21. Then, the pull rope 24 drives the first sealing plate 22 on the opening and closing box 21 to move upwards, thereby opening the air inlet pipe 6. Then, the air is squeezed by pushing the column 42. The gas cylinder moves horizontally within the chamber 41, causing the pusher column 42 to move the extrusion plate 43. The extrusion plate 43 pushes the air in the extrusion chamber 41 into the first connecting pipe 44. Subsequently, the first connecting pipe 44, through the second connecting pipe 45, the mounting pipe 2, and the third connecting pipe 46, introduces the gas into the pipe 4. The pipe 4 then introduces the gas into the mounting chamber 5. The mounting chamber 5 then enters the transmission chamber 7 through the open air inlet pipe 6, which in turn pushes the pusher plate 31 within the transmission chamber 7. The pusher plate 31 moves the first transmission rack 32, which in turn drives the transmission gear 33. The transmission gear 33 rotates, driving the second transmission rack 34 to move. The second transmission rack 34 drives the transmission plate 35 and transmission rod 12 to move. The transmission rod 12 drives the connecting bolt 11 and the suction plate 10 to move. Subsequently, the suction box 8 extracts water from this location. At the same time, the suction plate 10 drives the sealing block 51, connecting rod 52, and second sealing plate 53 to move, causing the second sealing plate 53 to seal the inlet of the suction box 8, preventing subsequent water from entering the suction box 8. Then, the mounting box 5 continues to move downwards to the next survey depth, and then... Repeat the above actions to allow another water suction box 8 to draw water for sampling. Repeat the above actions in sequence to sample groundwater at different depths. After sampling is completed, remove the installation box 5 from the water and then unscrew each water suction box 8 from the transmission box 7. At this time, during the rotation, the connecting bolt 11 on the pumping plate 10 is also unscrewed from the transmission rod 12. Then, pull the second sealing plate 53 to open the water suction port of the water suction box 8, thereby pouring out the water sampled in each water suction box 8. This allows for sampling of groundwater at different depths at one time, further improving the sampling efficiency.

[0040] Example 2

[0041] Based on Example 1, please refer to Figures 2 to 5As shown, after sampling is completed, the water absorption box 8 is unscrewed from the transmission box 7, and the connecting bolt 11 is unscrewed from the transmission rod 12. Then, the inside of the water absorption box 8 is cleaned. At the same time, the push column 42 on the extrusion box 41 is pulled, and the push column 42 drives the extrusion plate 43 to move, so that the extrusion plate 43 returns to its initial position. At the same time, each of the first sealing plates 22 is pushed down, so that the rubber sealing ring 23 on the first sealing plate 22 is squeezed and sealed with the opening and closing box 21, thereby sealing the air inlet pipe 6. Then, the cleaned water absorption box 8 is screwed back onto the transmission box 7, and the connecting bolt 11 is screwed into the transmission rod 12 for fixed connection, so that the sampling device can be reused.

[0042] Working principle:

[0043] Equipment installation and deployment:

[0044] First, the support frame 1 is fixedly installed at the water intake position through the fixing holes on its bottom fixing plate.

[0045] Then, by turning the handle on one side of the mounting tube 2, the mounting tube 2 rotates on the support frame 1, causing the take-up roller 3, which is fixed to its outer surface, to rotate. The take-up roller 3 unwinds the pipe 4 wound on it, and the mounting box 5, which is fixedly connected to one end of the pipe 4, moves downward accordingly.

[0046] Deep positioning:

[0047] During the lowering of the installation box 5, observe the scale mark 9 set on the pipe 4. When the installation box 5 falls to the specified depth for groundwater detection, stop rotating the installation pipe 2.

[0048] Open intake pipe 6:

[0049] At this point, by pulling the corresponding numbered pull rope 24 (the pull rope 24 is engraved with a number), the pull rope 24 is pulled upward. The pull rope 24 causes the first sealing plate 22, which is slidably connected inside the opening and closing box 21, to move upward, so that the rubber sealing ring 23 on the first sealing plate 22 is disengaged from the opening and closing box 21, thereby opening the air intake pipe 6.

[0050] Gas propulsion and pumping:

[0051] By pushing the pusher column 42 on the extrusion box 41, the pusher column 42 drives the extrusion plate 43, which is fixedly connected to one end, to slide within the extrusion box 41. The extrusion plate 43 pushes the air in the extrusion box 41 into the first connecting pipe 44.

[0052] The gas in the first connecting pipe 44 is sequentially introduced into the pipe 4 through the second connecting pipe 45 (the second connecting pipe 45 is rotatably connected to the mounting pipe 2), the mounting pipe 2, and the third connecting pipe 46 (the third connecting pipe 46 is fixedly connected to the pipe 4).

[0053] Pipeline 4 introduces gas into mounting box 5, and the gas in mounting box 5 enters transmission box 7 through open air inlet pipe 6.

[0054] The gas entering the transmission box 7 pushes the push plate 31, which is slidably connected inside the transmission box 7, to move. The push plate 31 drives the first transmission rack 32, which is fixedly connected to one side of it, to move. The first transmission rack 32 drives the transmission gear 33, which is meshed with one side of it (the transmission gear 33 is rotatably connected to the transmission box 7), to rotate.

[0055] The transmission gear 33 drives the second transmission rack 34, which is meshed with it on one side, to move. The second transmission rack 34 drives the transmission plate 35, which is fixedly connected to it on one side, to move. The transmission plate 35 drives the transmission rod 12, which is fixedly connected to it on one side, to slide within the transmission box 7.

[0056] The transmission rod 12 drives the connecting bolt 11, which is threaded to one end of it, to move. The connecting bolt 11 then drives the water suction plate 10, which is fixedly connected to one side of it, to slide within the water suction tank 8. The water suction tank 8 then extracts water from that location.

[0057] Sealed water inlet of the suction tank (8 inlets):

[0058] At the same time, the pumping plate 10 drives the sealing block 51, which is fixedly connected to one side of it, to slide within the water suction box 8, and the sealing block 51 seals the water inlet of the water suction box 8.

[0059] The sealing block 51 drives the connecting rod 52, which is fixedly connected to one side of it, to move. The connecting rod 52 drives the second sealing plate 53, which is fixedly connected to one end of it, to move, so that the second sealing plate 53 further seals the inlet of the water suction box 8, preventing subsequent water from entering the water suction box 8.

[0060] Multi-depth sampling:

[0061] The installation box 5 is moved downwards to the next survey depth. Then, the actions of opening the air inlet pipe 6, propelling the gas, pumping water, and sealing are repeated to allow the other water suction box 8 to draw water samples. The above actions are repeated sequentially to sample groundwater at different depths.

[0062] Sampling completed and water collected:

[0063] After sampling is completed, remove the installation box 5 from the water, and then unscrew each water suction box 8 from the transmission box 7. At this time, during rotation, the connecting bolts 11 on the water suction plate 10 are also unscrewed from the transmission rod 12.

[0064] Then, the second sealing plate 53 is pulled out to open the water inlet of the water suction box 8, thereby pouring out the water sampled in each water suction box 8, realizing one-time sampling of water at different underground depths, and improving sampling efficiency.

[0065] Equipment cleaning and reuse:

[0066] After sampling is completed, the water absorption box 8 is unscrewed from the transmission box 7, and the connecting bolt 11 is unscrewed from the connecting rod 52. Then the inside of the water absorption box 8 is cleaned.

[0067] At the same time, the push column 42 on the extrusion box 41 is pulled, and the push column 42 drives the extrusion plate 43 to move, so that the extrusion plate 43 returns to its initial position.

[0068] At the same time, each of the first sealing plates 22 is pushed downwards, so that the rubber sealing rings 23 on the first sealing plate 22 are squeezed and sealed with the opening and closing box 21, thereby sealing the air intake pipe 6.

[0069] Then, the cleaned water absorption box 8 is screwed onto the transmission box 7, and the connecting bolt 11 is screwed into the transmission rod 12 for fixed connection, so that the sampling device can be reused.

[0070] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-layer, fixed-depth groundwater sampling device for groundwater hydrological surveying, characterized in that, Includes a support frame (1), on which an installation tube (2) is rotatably connected. A take-up roller (3) is fixedly connected to the outer surface of the installation tube (2). A pipe (4) is provided on the take-up roller (3). A mounting box (5) is fixedly connected to one end of the pipe (4). Multiple air inlet pipes (6) are fixedly connected to the outer surface of the mounting box (5). A valve mechanism is provided on the air inlet pipe (6). The valve mechanism is used to open and close the air inlet pipe (6). A transmission box (7) is fixedly connected to one end of the air inlet pipe (6). A water suction box (8) is connected to one side of the transmission box (7). A scale mark (9) is provided on the pipe (4). A water-drawing plate (10) is slidably connected inside the water-drawing box (8). A connecting bolt (11) is fixedly connected to one side of the water-drawing plate (10). One end of the connecting bolt (11) is connected to a transmission rod (12) that is slidably connected to the transmission box (7). A transmission mechanism connected to the transmission box (7) is fixedly connected to one side of the transmission rod (12). The transmission mechanism is used to drive the transmission rod (12) to move.

2. The multi-layer fixed-depth groundwater sampling device for groundwater hydrological survey according to claim 1, characterized in that, The valve mechanism includes an opening and closing box (21) fixedly connected to the air inlet pipe (6). A first sealing plate (22) is slidably connected inside the opening and closing box (21). Rubber sealing rings (23) are fixedly connected to both the left and right sides of the first sealing plate (22). A pull rope (24) slidably connected to the pipe (4) is fixedly connected to the top of the first sealing plate (22). The pull rope (24) is engraved with numbers.

3. A multi-layer, fixed-depth groundwater sampling device for groundwater hydrological surveying according to claim 1, characterized in that, The transmission mechanism includes a push plate (31) slidably connected to the transmission box (7). A first transmission rack (32) is fixedly connected to one side of the push plate (31). A transmission gear (33) rotatably connected to the transmission box (7) is meshed to one side of the first transmission rack (32). A second transmission rack (34) is meshed to one side of the transmission gear (33). A transmission plate (35) is fixedly connected to one side of the second transmission rack (34). One side of the transmission plate (35) is fixedly connected to the transmission rod (12). The mounting box (5) is provided with an air blowing mechanism connected to the support frame (1), which is used to drive the push plate (31) to move.

4. A multi-layer, fixed-depth groundwater sampling device for groundwater hydrological surveying according to claim 3, characterized in that, The blowing mechanism includes an air extrusion box (41) fixedly connected to a support frame (1), a push column (42) slidably connected to the air extrusion box (41), an extrusion plate (43) slidably connected to one end of the push column (42), a first connecting pipe (44) fixedly connected to the top of the air extrusion box (41), a second connecting pipe (45) rotatably connected to the mounting pipe (2) fixedly connected to one end of the first connecting pipe (44), and a third connecting pipe (46) fixedly connected to the pipe (4) on the outer surface of the mounting pipe (2).

5. A multi-layer, fixed-depth groundwater sampling device for groundwater hydrological surveying according to claim 1, characterized in that, A sealing block (51) is fixedly connected to one side of the pumping plate (10) and is slidably connected to the water suction box (8).

6. A multi-layer, fixed-depth groundwater sampling device for groundwater hydrological surveying according to claim 5, characterized in that, A connecting rod (52) is fixedly connected to one side of the sealing block (51), and a second sealing plate (53) is fixedly connected to one end of the connecting rod (52).

7. A multi-layer, fixed-depth groundwater sampling device for groundwater hydrological surveying according to claim 1, characterized in that, A conical block (61) is fixedly connected to the bottom of the mounting box (5), and a rotating handle is fixedly connected to one side of the mounting tube (2).

8. A multi-layer, fixed-depth groundwater sampling device for groundwater hydrological surveying according to claim 1, characterized in that, The bottom of the support frame (1) is fixedly connected to a fixing plate, and the fixing plate has fixing holes.

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