Sampling device for underground water detection

Abstract

The invention relates to the technical field of underground water sampling, in particular to a sampling device for underground water detection, which comprises a supporting seat, a rotating shaft rotatably connected with the supporting seat penetrates through the supporting seat, a driver for driving the rotating shaft to rotate is mounted on the supporting seat, and a shielding sleeve is sleeved outside the rotating shaft. A damping transmission structure matched with the shielding sleeve is installed on the rotating shaft, a plurality of sampling boxes which are evenly distributed in the circumferential direction are arranged above the supporting base, each sampling box is of a cavity structure with an opening in one end, the opening directions of the sampling boxes all face the shielding sleeve, and a mounting hole is formed in the shielding sleeve; a filter screen matched with the sampling box is fixedly connected in the mounting hole; the sampling device does not need to be repeatedly placed in underground water by a worker, and underground water with different depths can be obtained only by placing the sampling device in the underground water once, so that the sampling convenience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of groundwater sampling, and in particular to a sampling device for groundwater detection. Background Art

[0002] When conducting a groundwater quality survey, the quality of groundwater is detected to obtain the substance content in the groundwater. When obtaining groundwater, it is necessary to sample the groundwater. When sampling, the sampling device is placed into the groundwater so that the groundwater enters the sampling device. After the collection is completed, the sampling device is taken out of the groundwater to obtain a sample of the groundwater.

[0003] However, it is worth considering that because the depths of groundwater are different and the substance contents are also different, it is necessary to collect groundwater at different depths to improve the accuracy of detecting the substance content of groundwater at different depths. In order to obtain groundwater at different depths, workers need to place the sampling device into the groundwater multiple times for multiple samplings, which is rather troublesome.

[0004] Therefore, in order to solve the above problems, the emergence of a related facility that more meets the usage requirements is needed. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a sampling device for groundwater detection to solve the problem that in order to obtain groundwater at different depths, workers need to place the sampling device into the groundwater multiple times for multiple samplings.

[0006] Based on the above purpose, the present invention provides a sampling device for groundwater detection, including a support base. A rotating shaft is rotatably connected through the support base. The support base is equipped with a driver for driving the rotation of the rotating shaft. A shielding sleeve is sleeved outside the rotating shaft. The rotating shaft is equipped with a damping transmission structure adapted to the shielding sleeve. Above the support base, there are several sampling boxes evenly distributed in a circle. The sampling box is a cavity structure with one end open, and the opening directions of several sampling boxes all face the shielding sleeve. Installation holes are opened on the shielding sleeve, and a filter screen adapted to the sampling box is fixedly connected in the installation holes; The rotating shaft is fixedly installed with a mounting plate, and the mounting plate is fixedly installed with a cleaning brush adapted to the filter screen. A drain pipe is fixedly connected to the bottom of the sampling box. A movable seat is slidably sleeved outside the drain pipe. The support base is equipped with a translation pressing structure adapted to the movable seat. The movable seat is equipped with an opening and closing unit adapted to the drain pipe, and the movable seat is equipped with a magnetic attraction fixing mechanism adapted to the sampling box.

[0007] Optionally, the damping transmission structure includes a first rotating frame rotatably sleeved outside the rotating shaft, and the top of the shielding sleeve is fixedly connected to the bottom of the first rotating frame. A first damping disc is fixedly connected to the bottom of the first rotating frame. A second damping disc is fixedly sleeved outside the rotating shaft, and the top of the second damping disc is in contact with the bottom of the first damping disc. The support base is provided with a stop member adapted to the first rotating frame.

[0008] Optionally, the stop member includes a lifting ring disposed below the support base. A plurality of hydraulic telescopic rods are fixedly connected to the top of the support base, and the telescopic ends of the hydraulic telescopic rods are fixedly connected to the top of the lifting ring. At least one stop frame is fixedly connected to the top of the lifting ring. The stop frame penetrates through the support base, and the side wall of the stop frame is in contact with the first rotating frame.

[0009] Optionally, the opening and closing unit includes a first sealing disc disposed below the drain pipe. The top of the first sealing disc is in contact with the bottom of the drain pipe. The movable seat is provided with a stretching member adapted to the first sealing disc. A fixed block is fixedly connected to the bottom of the first sealing disc. A first groove is opened at the top of the rotating shaft. A first movable column is disposed in the first groove. The bottom end of the first movable column is connected to the bottom inner wall of the first groove through a first compression spring. A lifting frame is slidably sleeved outside the rotating shaft and located below the lifting ring. A guiding hole is opened on the inner wall of the first groove. A first guiding block is slidably disposed in the guiding hole, and the first guiding block is fixedly connected to both the lifting frame and the first movable column. The fixed block is provided with a first sliding groove adapted to the lifting frame.

[0010] Optionally, the stretching member includes a plurality of fixed columns disposed above the first sealing disc. The bottom of the fixed column is fixedly connected to the top of the movable seat. A second groove is opened at the bottom of the fixed column. A second movable column is slidably disposed in the second groove. The top end of the second movable column is connected to the top inner wall of the second groove through a stretching spring. The bottom end of the second movable column penetrates through the movable seat, and the bottom end of the second movable column is fixedly connected to the top of the first sealing disc.

[0011] Optionally, the magnetic attraction fixing mechanism includes at least one iron block fixedly installed at the bottom of the sampling box. A limiting sleeve is slidably sleeved outside the iron block. The bottom of the limiting sleeve is fixedly connected to the top of the movable seat. A magnet block is slidably disposed in the limiting sleeve. The top of the magnet block is in contact with the bottom of the iron block. A guiding groove is opened on the inner wall of the limiting sleeve. A second guiding block is slidably disposed in the guiding groove, and the second guiding block is fixedly connected to the corresponding magnet block. An activity plate is disposed below the fixed block. The magnet block and the activity plate are connected through a connecting column, and the connecting column penetrates through the movable seat.

[0012] Optionally, the driver includes a protective case fixedly installed on the top of the support base. The protective case is a cavity structure with an open bottom end. A first gear is fixedly sleeved outside the rotating shaft and located inside the protective case. A servo motor located inside the protective case is fixedly connected to the top of the support base. The output end of the servo motor is fixedly connected to a second gear meshing with the first gear.

[0013] Optionally, the translation pressing structure includes a sliding plate fixedly installed on the movable seat. A number of second sliding grooves are formed on the support base, and one end of the sliding plate away from the movable seat is located in the corresponding second sliding groove. A first support column is fixedly connected to the bottom of the movable seat. A second rotating frame is rotatably sleeved outside the rotating shaft and located below the support base. A number of support blocks are fixedly connected to the top of the second rotating frame, and the number of support blocks is the same as that of the first support columns. An inclined surface adapted to the first support column is provided on the support block. A third damping disc is fixedly connected to the top of the second rotating frame. A fourth damping disc is fixedly sleeved outside the rotating shaft. The bottom of the fourth damping disc is in contact with the top of the third damping disc. A sealing ring is fixedly connected to the opening of the sampling box, and the sealing ring is in contact with the outer wall of the shielding sleeve.

[0014] Optionally, a second sealing disc is provided inside the sampling box. An air inlet hole is formed in the inner wall of the top of the sampling box and located above the second sealing disc. The top of the second sealing disc is in contact with the inner wall of the top of the sampling box. A number of piston columns are fixedly connected to the top of the second sealing disc. The top ends of the piston columns are fixedly connected to a fixed disc located above the sampling box. The fixed disc and the sampling box are connected by a second compression spring. A second support column is fixedly connected to the top of the second sealing disc, and the second support column penetrates through the air inlet hole. Above the rotating shaft, there is a pressing frame adapted to the second support column, and the pressing frame is fixedly connected to the top end of the first movable column.

[0015] Optionally, an installation frame is provided above the shielding sleeve, and the installation frame is fixedly connected to the support base. A number of hanging rings are fixedly connected to the top of the installation frame.

[0016] Advantages of the present invention: The drive shaft is rotated by a driver, and the drive shaft drives the shielding sleeve to rotate synchronously through a damping transmission structure, so that the filter screen located on the shielding sleeve moves to one side of a corresponding sampling box, and the opening on the filter screen and the sampling box overlap. The drive shaft stops driving the shielding sleeve to rotate synchronously through the damping transmission structure, and the filter screen filters debris in the water. The groundwater flows into the sampling box through the filter screen, and the drive shaft drives the cleaning brush to continuously rotate through the mounting plate, and the cleaning brush periodically cleans the filter screen. When the sampling box is filled with groundwater, the drive shaft drives the shielding sleeve to rotate synchronously again through the damping transmission structure, so that the filter screen moves between two adjacent sampling boxes, and the filter screen is no longer located on one side of the corresponding sampling box. When the lifting device drives the support base to move down to the next preset depth, the drive shaft drives the shielding sleeve to rotate synchronously again through the damping transmission structure, so that the filter screen on the shielding sleeve moves to one side of the next sampling box, and the groundwater can be sampled again. Repeat the above sampling steps until the sampling in all sampling boxes is completed. Then, the lifting device drives the support base to move up to the initial height, the drain pipe is opened through the opening and closing unit, and the groundwater in the sampling box is taken out. Workers do not need to place the sampling device in the groundwater multiple times. Only by placing the sampling device in the groundwater once, groundwater at different depths can be obtained, which improves the convenience of sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the sectional structure of the sampling box according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the top of the support base according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the movable seat according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the separated structure of the limiting sleeve and the magnet block according to an embodiment of the present invention; Figure 6 It is a schematic diagram of the separated structure of the fixed column and the second movable column according to an embodiment of the present invention; Figure 7 It is a schematic diagram of the bottom of the support base according to an embodiment of the present invention; Figure 8 It is a schematic diagram of the overall structure of the drive shaft according to an embodiment of the present invention; Figure 9 It is a schematic structural diagram of a cross-section of a rotating shaft according to an embodiment of the present invention.

[0019] The markings in the figure are: 1. Support seat; 2. Sampling box; 3. Drain pipe; 4. Rotating shaft; 5. First rotating frame; 6. Shielding sleeve; 7. Mounting hole; 8. Filter screen; 9. Mounting plate; 10. Cleaning brush; 11. Movable seat; 12. First damping disc; 13. Second damping disc; 14. Lifting ring; 15. Hydraulic telescopic rod; 16. Stop frame; 17. First sealing disc; 18. Fixed block; 19. Lifting frame; 20. First slide slot; 21. First groove; 22. First movable column; 23. First compression spring; 24. Guide hole; 25. First guide block; 26. Fixed column; 27. Second groove; 28. Second movable column; 29. Tension spring ; 30. Iron block; 31. Limit sleeve; 32. Magnet block; 33. Guide groove; 34. Second guide block; 35. Movable plate; 36. Connecting column; 37. Protective shell; 38. First gear; 39. Servo motor; 40. Second gear; 41. Slide plate; 42. Second slide groove; 43. First support column; 44. Second rotating frame; 45. Support block; 46. Third damping disk; 47. Fourth damping disk; 48. Sealing ring; 49. Second sealing disk; 50. Air inlet; 51. Piston column; 52. Fixed disk; 53. Second compression spring; 54. Second support column; 55. Pressing frame; 56. Mounting frame; 57. Lifting ring. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0021] This embodiment proposes a sampling device for groundwater detection, such as Figure 1 , Figure 3 , Figure 7 and Figure 8 As shown, it includes a support base 1, a rotating shaft 4 rotatably connected passes through the support base 1, a driver for driving the rotating shaft 4 to rotate is installed on the support base 1, a shielding sleeve 6 is provided on the outer sleeve of the rotating shaft 4, and a damping transmission structure adapted to the shielding sleeve 6 is installed on the rotating shaft 4. A plurality of sampling boxes 2 uniformly distributed in a circle are arranged above the support base 1, the sampling boxes 2 are a cavity structure with an opening at one end, and the opening directions of the plurality of sampling boxes 2 are all toward the shielding sleeve 6, a mounting hole 7 is opened on the shielding sleeve 6, and a filter screen 8 adapted to the sampling box 2 is fixedly connected in the mounting hole 7; The rotating shaft 4 is fixedly installed with a mounting plate 9, the mounting plate 9 is fixedly installed with a cleaning brush 10 adapted to the filter net 8, the bottom of the sampling box 2 is fixedly connected with a drain pipe 3, an activity seat 11 is slidably sleeved outside the drain pipe 3, the support seat 1 is equipped with a translation pressing structure adapted to the activity seat 11, the activity seat 11 is equipped with an opening and closing unit adapted to the drain pipe 3, and the activity seat 11 is equipped with a magnetic absorption fixing mechanism adapted to the sampling box 2; The rotating shaft 4 is driven to rotate by a driver, and the rotating shaft 4 drives the shielding sleeve 6 to rotate synchronously through a damping transmission structure, so that the filter net 8 on the shielding sleeve 6 moves to one side of a corresponding sampling box 2, and the openings on the filter net 8 and the sampling box 2 overlap. The rotating shaft 4 stops driving the shielding sleeve 6 to rotate synchronously through the damping transmission structure. The filter net 8 filters debris in the water, and the groundwater flows into the sampling box 2 through the filter net 8. Moreover, the rotating shaft 4 drives the cleaning brush 10 to rotate continuously through the mounting plate 9, and the cleaning brush 10 periodically cleans the filter net 8. When the sampling box 2 is filled with groundwater, the rotating shaft 4 drives the shielding sleeve 6 to rotate synchronously again through the damping transmission structure, so that the filter net 8 moves between two adjacent sampling boxes 2, and the filter net 8 is no longer on one side of the corresponding sampling box 2. When the lifting device drives the support seat 1 to move down to the next preset depth, the rotating shaft 4 drives the shielding sleeve 6 to rotate synchronously again through the damping transmission structure, so that the filter net 8 on the shielding sleeve 6 moves to one side of the next sampling box 2, and the groundwater can be sampled again. Repeat the above sampling steps until the sampling in all sampling boxes 2 is completed. Then, the lifting device drives the support seat 1 to move up to the initial height, the drain pipe 3 is opened through the opening and closing unit, and the groundwater in the sampling box 2 is taken out. It is not necessary for workers to place the sampling device in the groundwater multiple times. Only by placing the sampling device in the groundwater once, groundwater at different depths can be obtained, which improves the convenience of sampling.

[0022] In some optional specific embodiments, such as Figure 3 、 Figure 7 and Figure 8 shown, the damping transmission structure includes a first rotating frame 5 rotatably sleeved outside the rotating shaft 4, and the top of the shielding sleeve 6 is fixedly connected to the bottom of the first rotating frame 5. The bottom of the first rotating frame 5 is fixedly connected with a first damping disc 12. A second damping disc 13 is fixedly sleeved outside the rotating shaft 4, and the top of the second damping disc 13 is in contact with the bottom of the first damping disc 12. The support seat 1 is equipped with a stop member adapted to the first rotating frame 5. The stop member includes a lifting ring 14 arranged below the support seat 1. A plurality of hydraulic telescopic rods 15 are fixedly connected to the top of the support seat 1, and the telescopic ends of the hydraulic telescopic rods 15 are fixedly connected to the top of the lifting ring 14. At least one stop frame 16 is fixedly connected to the top of the lifting ring 14. The stop frame 16 penetrates the support seat 1, and the side wall of the stop frame 16 is in contact with the first rotating frame 5; When the driver drives the rotating shaft 4 to rotate, the rotating shaft 4 drives the second damping disc 13 to rotate. The second damping disc 13 drives the first damping disc 12, the first rotating frame 5 and the shielding sleeve 6 to rotate through friction. When the shielding sleeve 6 drives the filter net 8 to move to one side of one of the sampling boxes 2, the first rotating frame 5 contacts the stop frame 16, and the first rotating frame 5 and the shielding sleeve 6 stop rotating. With the continuous rotation of the rotating shaft 4, the second damping disc 13 cannot drive the first damping disc 12 to rotate continuously through friction, and the rotating shaft 4 drives the cleaning brush 10 to rotate continuously through the mounting plate 9. The cleaning brush 10 periodically cleans the filter net 8. When it is necessary for the rotating shaft 4 to drive the first rotating frame 5 and the shielding sleeve 6 to rotate synchronously, the hydraulic telescopic rod 15 drives the lifting ring 14 and the stop frame 16 to move upward, so that the stop frame 16 no longer contacts the first rotating frame 5. With the continuous rotation of the rotating shaft 4, the second damping disc 13 can drive the first damping disc 12 and the shielding sleeve 6 to rotate synchronously through friction again. At this time, the hydraulic telescopic rod 15 drives the lifting ring 14 and the stop frame 16 to move downward. When the first rotating frame 5 contacts the stop frame 16 again, at this time the shielding sleeve 6 drives the filter net 8 to move between two adjacent sampling boxes 2. When the next sampling is required, the hydraulic telescopic rod 15 drives the lifting ring 14 and the stop frame 16 to move upward again, and the stop frame 16 no longer limits the first rotating frame 5. With the continuous rotation of the rotating shaft 4, after the rotating shaft 4 drives the first rotating frame 5 and the shielding sleeve 6 to rotate synchronously again, the hydraulic telescopic rod 15 drives the lifting ring 14 and the stop frame 16 to move downward again. When the rotating shaft 4 drives the filter net 8 to move to one side of the next sampling box 2 through the first rotating frame 5 and the shielding sleeve 6, and at this time the first rotating frame 5 contacts the stop frame 16 again, the shielding sleeve 6 and the filter net 8 can be stopped after moving to the preset position again.

[0023] In some optional specific embodiments, such as Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 9As shown in the figure, the opening and closing unit includes a first sealing disc 17 arranged below the drain pipe 3. The top of the first sealing disc 17 is in contact with the bottom of the drain pipe 3. The movable seat 11 is equipped with a stretching member adapted to the first sealing disc 17. A fixed block 18 is fixedly connected to the bottom of the first sealing disc 17. A first groove 21 is opened at the top of the rotating shaft 4. A first movable column 22 is arranged in the first groove 21. The bottom end of the first movable column 22 and the bottom inner wall of the first groove 21 are connected by a first compression spring 23. A lifting frame 19 located below the lifting ring 14 is slidably sleeved on the outside of the rotating shaft 4. A guiding hole 24 is opened on the inner wall of the first groove 21. A first guiding block 25 is slidably arranged in the guiding hole 24, and the first guiding block 25 is fixedly connected to both the lifting frame 19 and the first movable column 22. The fixed block 18 is provided with a first sliding groove 20 adapted to the lifting frame 19. The stretching member includes a number of fixed columns 26 arranged above the first sealing disc 17. The bottom of the fixed column 26 is fixedly connected to the top of the movable seat 11. A second groove 27 is opened at the bottom of the fixed column 26. A second movable column 28 is slidably arranged in the second groove 27. The top end of the second movable column 28 and the top inner wall of the second groove 27 are connected by a stretching spring 29. The bottom end of the second movable column 28 penetrates through the movable seat 11, and the bottom end of the second movable column 28 is fixedly connected to the top of the first sealing disc 17. The magnetic attraction fixing mechanism includes at least one iron block 30 fixedly installed at the bottom of the sampling box 2. A limiting sleeve 31 is slidably sleeved on the outside of the iron block 30. The bottom of the limiting sleeve 31 is fixedly connected to the top of the movable seat 11. A magnet block 32 is slidably arranged in the limiting sleeve 31. The top of the magnet block 32 is in contact with the bottom of the iron block 30. A guiding groove 33 is opened on the inner wall of the limiting sleeve 31. A second guiding block 34 is slidably arranged in the guiding groove 33, and the second guiding block 34 is fixedly connected to the corresponding magnet block 32. A movable plate 35 is arranged below the fixed block 18. The magnet block 32 and the movable plate 35 are connected by a connecting column 36, and the connecting column 36 penetrates through the movable seat 11. A second sealing disc 49 is arranged in the sampling box 2. An air inlet hole 50 located above the second sealing disc 49 is opened on the top inner wall of the sampling box 2. The top of the second sealing disc 49 is in contact with the top inner wall of the sampling box 2. A number of piston columns 51 are fixedly connected to the top of the second sealing disc 49. The top end of the piston column 51 is fixedly connected to a fixed disc 52 located above the sampling box 2. The fixed disc 52 and the sampling box 2 are connected by a second compression spring 53. A second support column 54 is fixedly connected to the top of the second sealing disc 49, and the second support column 54 penetrates through the air inlet hole 50. A pressing frame 55 adapted to the second support column 54 is arranged above the rotating shaft 4, and the pressing frame 55 is fixedly connected to the top end of the first movable column 22; After the sampling is completed, the support base 1 is removed from the groundwater, and the shielding sleeve 6 drives the filter net 8 to move between two adjacent sampling boxes 2. When the filter net 8 no longer overlaps with the opening of the sampling box 2, at this time, the stop frame 16 abuts against the first rotating frame 5. When the rotating shaft 4 rotates, the rotating shaft 4 will not drive the first rotating frame 5 and the shielding sleeve 6 to rotate synchronously. At this time, the servo motor 39 is used to drive the second gear 40 to rotate. The second gear 40 drives the rotating shaft 4 to rotate through the first gear 38. The rotating shaft 4 drives the lifting frame 19 and the first movable column 22 to rotate synchronously through the first guide block 25. The first compression spring 23 is in a compressed state. At this time, the first compression spring 23 exerts a pressure on the first movable column 22 and the first guide block 25, so that the top of the first guide block 25 abuts against the inner wall of the top of the guide hole 24. The lifting frame 19 is located at the highest position. At this time, the tension spring 29 is in a stretched state. The tension spring 29 exerts a pulling force on the second movable column 28 and the first sealing disc 17, so that the top of the first sealing disc 17 is in close contact with the bottom of the drain pipe 3. The second compression spring 53 is in a compressed state. The second compression spring 53 exerts a pressure on the fixed disc 52, the piston column 51 and the second sealing disc 49, so that the top of the second sealing disc 49 is in close contact with the inner wall of the top of the sampling box 2. The second sealing disc 49 seals the air inlet hole 50. When the end of the lifting frame 19 moves into one of the first sliding grooves 20, the hydraulic expansion rod 15 drives the lifting ring 14 to move downward. The lifting ring 14 presses the lifting frame 19, so that the lifting frame 19 drives the first sealing disc 17 and the second movable column 28 to move downward relative to the drain pipe 3 and the movable seat 11 through the fixed block 18, and the drain pipe 3 can be opened. At the same time when the lifting frame 19 moves downward, the lifting frame 19 drives the first movable column 22 and the pressing frame 55 to move downward through the first guide block 25. The pressing frame 55 presses the corresponding second support column 54 and the second sealing disc 49, so that the second sealing disc 49 no longer contacts the inner wall of the top of the sampling box 2, and the air inlet hole 50 can be opened. When the drain pipe 3 drains water, the sampling box 2 can intake air through the air inlet hole 50, and the groundwater can be quickly discharged. After the drainage is completed, the hydraulic expansion rod 15 is used to drive the lifting ring 14 and the lifting frame 19 to move downward continuously, so that the lifting frame 19 pushes the movable plate 35 and the connecting column 36 to move downward through the fixed block 18. The connecting column 36 drives the magnet block 32 to move downward. The top of the second guide block 34 no longer contacts the inner wall of the top of the guide groove 33. The second guide block 34 slides downward in the guide groove 33. The magnet block 32 is no longer magnetically attracted to the iron block 30, and the fixation of the iron block 30 and the sampling box 2 can be released. When the rotating shaft 4 drives the first movable column 22 and the pressing frame 55 to rotate, so that the pressing frame 55 is no longer located above the corresponding sampling box 2, the staff can drive the sampling box 2 to move upward, so that the iron block 30 is separated from the limiting sleeve 31, and the removal of the sampling box 2 can be completed. When the lifting ring 14 moves downward, the lifting ring 14 drives the stop frame 16 to move downward synchronously relative to the first rotating frame 5, and the stop frame 16 always keeps in contact with the first rotating frame 5.When the hydraulic telescopic rod 15 drives the lifting ring 14 to move upward, the first compression spring 23 drives the first movable column 22, the first guide block 25 and the lifting frame 19 to move upward synchronously, and the tension spring 29 drives the second movable column 28 and the first sealing disc 17 to move upward. When the lifting frame 19 resets to the initial height, the first sealing disc 17 and the fixed block 18 reset to the initial position synchronously. The end of the lifting frame 19 is driven by the rotating shaft 4 to rotate into the next first chute 20. By driving the lifting ring 14 to move downward through the hydraulic telescopic rod 15, the corresponding drain pipe 3 can be opened again or the fixing relationship between the sampling box 2 and the movable seat 11 can be released.

[0024] In some optional specific embodiments, such as Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 shown, the driver includes a protective shell 37 fixedly installed on the top of the support base 1. The protective shell 37 is a cavity structure with an open bottom end. A first gear 38 is fixedly sleeved outside the rotating shaft 4 and is located inside the protective shell 37. The top of the support base 1 is fixedly connected with a servo motor 39 located inside the protective shell 37. The output end of the servo motor 39 is fixedly connected with a second gear 40 meshing with the first gear 38. The translation pressing structure includes a slide plate 41 fixedly installed on the movable seat 11. A number of second chutes 42 are provided on the support base 1, and one end of the slide plate 41 away from the movable seat 11 is located in the corresponding second chute 42. The bottom of the movable seat 11 is fixedly connected with a first support column 43. A second rotating frame 44 is rotatably sleeved outside the rotating shaft 4 and is located below the support base 1. The top of the second rotating frame 44 is fixedly connected with a number of support blocks 45, and the number of support blocks 45 is the same as that of the first support columns 43. The support blocks 45 are provided with inclined surfaces adapted to the first support columns 43. The top of the second rotating frame 44 is fixedly connected with a third damping disc 46. A fourth damping disc 47 is fixedly sleeved outside the rotating shaft 4. The bottom of the fourth damping disc 47 is in contact with the top of the third damping disc 46. A sealing ring 48 is fixedly connected at the opening of the sampling box 2, and the sealing ring 48 is in contact with the outer wall of the shielding sleeve 6. An installation frame 56 is provided above the shielding sleeve 6, and the installation frame 56 is fixedly connected with the support base 1. The top of the installation frame 56 is fixedly connected with a number of hanging rings 57; When the sampling device has not been placed in the groundwater, the driver drives the rotation of the rotating shaft 4. The rotating shaft 4 drives the rotation of the fourth damping disc 47. The fourth damping disc 47 drives the rotation of the third damping disc 46 and the second rotating frame 44 through friction. The second rotating frame 44 drives the movement of the support block 45. The first support column 43 is in sliding contact with the inclined surface on the support block 45. The support block 45 pushes the first support column 43 and the movable seat 11 towards the support seat 1. The sliding plate 41 slides relative to the second chute 42, causing the sampling box 2 above the movable seat 11 to move towards the shielding sleeve 6. Further, the sealing ring 48 at the opening of the sampling box 2 abuts against the shielding sleeve 6. When the pressing force of the sampling box 2 on the shielding sleeve 6 reaches the preset value, with the continuous rotation of the fourth damping disc 47, the fourth damping disc 47 cannot drive the third damping disc 46 and the second rotating frame 44 to rotate synchronously through friction. The sealing ring 48 abuts against the shielding sleeve 6. Through the design of the sealing ring 48, the sealing performance between the sampling box 2 and the shielding sleeve 6 is increased. When the sampling is completed and the groundwater in the sampling box 2 is discharged through the drain pipe 3, and when all the fixing relationships between the sampling box 2 and the movable seat 11 are released, the fourth damping disc 47 is driven to rotate in the reverse direction by the rotating shaft 4, so that the fourth damping disc 47 drives the third damping disc 46 and the second rotating frame 44 to rotate in the reverse direction through friction. The support block 45 no longer exerts pressure on the first support column 43, and the sampling box 2 no longer exerts pressure on the shielding sleeve 6, so that the sealing ring 48 no longer abuts against the shielding sleeve 6, facilitating the removal of the sampling box 2 from above the movable seat 11. The lifting ring 57 is fixed to an external lifting device through a rope, and the support seat 1 is supported by the mounting bracket 56 and the lifting ring 57.

[0025] Working principle: The support base 1 is fixed to an external lifting device by a rope. The support base 1 is driven by the lifting device to descend to a preset depth in the groundwater. The rotating shaft 4 is driven to rotate by a driver. The rotating shaft 4 drives the shielding sleeve 6 to rotate synchronously through a damping transmission structure, so that the filter net 8 on the shielding sleeve 6 moves to one side of a corresponding sampling box 2, and the openings on the filter net 8 and the sampling box 2 overlap. The rotating shaft 4 stops driving the shielding sleeve 6 to rotate synchronously through the damping transmission structure. The filter net 8 filters debris in the water, and the groundwater flows into the sampling box 2 through the filter net 8. Moreover, the rotating shaft 4 drives the cleaning brush 10 to continuously rotate through the mounting plate 9, and the cleaning brush 10 periodically cleans the filter net 8. When the sampling box 2 is filled with groundwater, the rotating shaft 4 drives the shielding sleeve 6 to rotate synchronously again through the damping transmission structure, so that the filter net 8 moves between two adjacent sampling boxes 2, and the filter net 8 is no longer on one side of the corresponding sampling box 2. When the lifting device drives the support base 1 to move down to the next preset depth, the rotating shaft 4 drives the shielding sleeve 6 to rotate synchronously again through the damping transmission structure, so that the filter net 8 on the shielding sleeve 6 moves to one side of the next sampling box 2, and the groundwater can be sampled again. Repeat the above sampling steps until the sampling in all the sampling boxes 2 is completed. Then, the lifting device drives the support base 1 to move up to the initial height, the drain pipe 3 is opened through the opening and closing unit, and the groundwater in the sampling box 2 is taken out. There is no need for workers to place the sampling device in the groundwater multiple times. Just place the sampling device in the groundwater once, and the groundwater at different depths can be obtained, improving the convenience of sampling; When the driver drives the rotating shaft 4 to rotate, the rotating shaft 4 drives the second damping disc 13 to rotate. The second damping disc 13 drives the first damping disc 12, the first rotating frame 5 and the shielding sleeve 6 to rotate through friction. When the shielding sleeve 6 drives the filter net 8 to move to one side of one of the sampling boxes 2, the first rotating frame 5 contacts the stopping frame 16, and the first rotating frame 5 and the shielding sleeve 6 stop rotating. As the rotating shaft 4 continues to rotate, the second damping disc 13 cannot drive the first damping disc 12 to rotate continuously through friction, and the rotating shaft 4 drives the cleaning brush 10 to rotate continuously through the mounting plate 9. The cleaning brush 10 periodically cleans the filter net 8. When it is necessary for the rotating shaft 4 to drive the first rotating frame 5 and the shielding sleeve 6 to rotate synchronously, the hydraulic expansion rod 15 drives the lifting ring 14 and the stopping frame 16 to move upward, so that the stopping frame 16 no longer contacts the first rotating frame 5. As the rotating shaft 4 continues to rotate, the second damping disc 13 can drive the first damping disc 12 and the shielding sleeve 6 to rotate synchronously through friction again. At this time, the hydraulic expansion rod 15 drives the lifting ring 14 and the stopping frame 16 to move downward. When the first rotating frame 5 contacts the stopping frame 16 again, at this time, the shielding sleeve 6 drives the filter net 8 to move between two adjacent sampling boxes 2. When the next sampling is required, the hydraulic expansion rod 15 drives the lifting ring 14 and the stopping frame 16 to move upward again. The stopping frame 16 no longer limits the first rotating frame 5. As the rotating shaft 4 continues to rotate, after the rotating shaft 4 drives the first rotating frame 5 and the shielding sleeve 6 to rotate synchronously again, the hydraulic expansion rod 15 drives the lifting ring 14 and the stopping frame 16 to move downward. When the rotating shaft 4 drives the filter net 8 to move to one side of the next sampling box 2 through the first rotating frame 5 and the shielding sleeve 6, and at this time the first rotating frame 5 contacts the stopping frame 16 again, the shielding sleeve 6 and the filter net 8 can stop moving to the preset position again; After the sampling is completed, the support base 1 is removed from the groundwater, and the shielding sleeve 6 drives the filter net 8 to move between two adjacent sampling boxes 2. When the filter net 8 no longer overlaps with the opening of the sampling box 2, at this time, the stop frame 16 abuts against the first rotating frame 5. When the rotating shaft 4 rotates, the rotating shaft 4 will not drive the first rotating frame 5 and the shielding sleeve 6 to rotate synchronously. At this time, the servo motor 39 is used to drive the second gear 40 to rotate. The second gear 40 drives the rotating shaft 4 to rotate through the first gear 38. The rotating shaft 4 drives the lifting frame 19 and the first movable column 22 to rotate synchronously through the first guide block 25. The first compression spring 23 is in a compressed state. At this time, the first compression spring 23 exerts a pressure on the first movable column 22 and the first guide block 25, so that the top of the first guide block 25 abuts against the inner wall of the top of the guide hole 24. The lifting frame 19 is located at the highest position. At this time, the tension spring 29 is in a stretched state. The tension spring 29 exerts a pulling force on the second movable column 28 and the first sealing disc 17, so that the top of the first sealing disc 17 is in close contact with the bottom of the drain pipe 3. The second compression spring 53 is in a compressed state. The second compression spring 53 exerts a pressure on the fixed disc 52, the piston column 51 and the second sealing disc 49, so that the top of the second sealing disc 49 is in close contact with the inner wall of the top of the sampling box 2. The second sealing disc 49 seals the air inlet hole 50. When the end of the lifting frame 19 moves into one of the first sliding grooves 20, the hydraulic telescopic rod 15 drives the lifting ring 14 to move downward. The lifting ring 14 presses the lifting frame 19, so that the lifting frame 19 drives the first sealing disc 17 and the second movable column 28 to move downward relative to the drain pipe 3 and the movable seat 11 through the fixed block 18, and the drain pipe 3 can be opened. At the same time when the lifting frame 19 moves downward, the lifting frame 19 drives the first movable column 22 and the pressing frame 55 to move downward through the first guide block 25. The pressing frame 55 presses the corresponding second support column 54 and the second sealing disc 49, so that the second sealing disc 49 no longer contacts the inner wall of the top of the sampling box 2, and the air inlet hole 50 can be opened. When the drain pipe 3 drains water, the sampling box 2 can intake air through the air inlet hole 50, and the groundwater can be quickly discharged. After the drainage is completed, the hydraulic telescopic rod 15 is used to drive the lifting ring 14 and the lifting frame 19 to continue to move downward, so that the lifting frame 19 pushes the movable plate 35 and the connecting column 36 to move downward through the fixed block 18. The connecting column 36 drives the magnet block 32 to move downward. The top of the second guide block 34 no longer contacts the inner wall of the top of the guide groove 33. The second guide block 34 slides downward in the guide groove 33. The magnet block 32 is no longer magnetically attracted to the iron block 30, and the fixation of the iron block 30 and the sampling box 2 can be released. When the rotating shaft 4 drives the first movable column 22 and the pressing frame 55 to rotate, so that the pressing frame 55 is no longer located above the corresponding sampling box 2, the staff can drive the sampling box 2 to move upward, so that the iron block 30 is separated from the limit sleeve 31, and the removal of the sampling box 2 can be completed. When the lifting ring 14 moves downward, the lifting ring 14 drives the stop frame 16 to move downward synchronously relative to the first rotating frame 5, and the stop frame 16 always maintains a state of contacting the first rotating frame 5.When the hydraulic telescopic rod 15 drives the lifting ring 14 to move upward, the first compression spring 23 drives the first movable column 22, the first guide block 25 and the lifting frame 19 to move upward synchronously, and the tension spring 29 drives the second movable column 28 and the first sealing disc 17 to move upward. When the lifting frame 19 resets to the initial height, the first sealing disc 17 and the fixed block 18 reset to the initial position synchronously. The end of the lifting frame 19 is driven by the rotating shaft 4 to rotate into the next first sliding groove 20. By driving the lifting ring 14 to move downward through the hydraulic telescopic rod 15, the corresponding drain pipe 3 can be opened again or the fixing relationship between the sampling box 2 and the movable seat 11 can be released; When the sampling device has not been placed in the groundwater, the driver drives the rotating shaft 4 to rotate. The rotating shaft 4 drives the fourth damping disc 47 to rotate. The fourth damping disc 47 drives the third damping disc 46 and the second rotating frame 44 to rotate through friction. The second rotating frame 44 drives the support block 45 to move. The first support column 43 is in sliding contact with the inclined surface on the support block 45. The support block 45 pushes the first support column 43 and the movable seat 11 towards the support seat 1. The sliding plate 41 slides relative to the second sliding groove 42, so that the sampling box 2 located above the movable seat 11 moves towards the shielding sleeve 6, and further makes the sealing ring 48 at the opening of the sampling box 2 abut against the shielding sleeve 6. When the pressing force of the sampling box 2 on the shielding sleeve 6 reaches the preset value, as the fourth damping disc 47 continues to rotate, the fourth damping disc 47 cannot drive the third damping disc 46 and the second rotating frame 44 to rotate synchronously through friction. The sealing ring 48 abuts against the shielding sleeve 6. Through the design of the sealing ring 48, the sealing performance between the sampling box 2 and the shielding sleeve 6 is increased. When the sampling is completed and the groundwater in the sampling box 2 is discharged through the drain pipe 3, and when all the fixing relationships between the sampling boxes 2 and the movable seat 11 are released, the fourth damping disc 47 is driven to rotate reversely through the rotating shaft 4, so that the fourth damping disc 47 drives the third damping disc 46 and the second rotating frame 44 to rotate reversely through friction. The support block 45 no longer exerts pressure on the first support column 43, and the sampling box 2 no longer exerts pressure on the shielding sleeve 6, so that the sealing ring 48 no longer abuts against the shielding sleeve 6, which is convenient for taking the sampling box 2 down from above the movable seat 11. The lifting ring 57 is fixed to an external lifting device through a rope, and the support seat 1 is supported by the mounting frame 56 and the lifting ring 57.

[0026] Those of ordinary skill in the art should understand that the discussion of any embodiment above is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

Claims

1. A sampling device for groundwater detection, comprising a support base (1), characterized in that, A rotating shaft (4) is rotatably connected through the support base (1). The support base (1) is equipped with a driver for driving the rotation of the rotating shaft (4). A shielding sleeve (6) is sleeved outside the rotating shaft (4). The rotating shaft (4) is equipped with a damping transmission structure adapted to the shielding sleeve (6). Above the support base (1), there are several sampling boxes (2) evenly distributed in a circle. The sampling box (2) is a cavity structure with one end open, and the opening directions of several sampling boxes (2) all face the shielding sleeve (6). An installation hole (7) is formed in the shielding sleeve (6), and a filter screen (8) adapted to the sampling box (2) is fixedly connected in the installation hole (7). An installation plate (9) is fixedly installed on the rotating shaft (4). A cleaning brush (10) adapted to the filter screen (8) is fixedly installed on the installation plate (9). A drain pipe (3) is fixedly connected to the bottom of the sampling box (2). A movable seat (11) is slidably sleeved outside the drain pipe (3). The support base (1) is equipped with a translation pressing structure adapted to the movable seat (11). The movable seat (11) is equipped with an opening and closing unit adapted to the drain pipe (3). The movable seat (11) is equipped with a magnetic adsorption fixing mechanism adapted to the sampling box (2).

2. The sampling device for groundwater detection according to claim 1, wherein The damping transmission structure includes a first rotating frame (5) rotatably sleeved outside the rotating shaft (4). The top of the shielding sleeve (6) and the bottom of the first rotating frame (5) are fixedly connected. A first damping disc (12) is fixedly connected to the bottom of the first rotating frame (5). A second damping disc (13) is fixedly sleeved outside the rotating shaft (4), and the top of the second damping disc (13) is in contact with the bottom of the first damping disc (12). The support base (1) is equipped with a stop member adapted to the first rotating frame (5).

3. The sampling device for groundwater detection according to claim 2, characterized in that, The stop member includes a lifting ring (14) arranged below the support base (1). Several hydraulic telescopic rods (15) are fixedly connected to the top of the support base (1), and the telescopic ends of the hydraulic telescopic rods (15) and the top of the lifting ring (14) are fixedly connected. At least one stop frame (16) is fixedly connected to the top of the lifting ring (14). The stop frame (16) penetrates through the support base (1), and the side wall of the stop frame (16) is in contact with the first rotating frame (5).

4. The sampling device for groundwater detection according to claim 3, wherein, The opening and closing unit includes a first sealing disc (17) arranged below the drain pipe (3). The top of the first sealing disc (17) is in contact with the bottom of the drain pipe (3). The movable seat (11) is equipped with a stretching member adapted to the first sealing disc (17). A fixed block (18) is fixedly connected to the bottom of the first sealing disc (17). A first groove (21) is formed at the top of the rotating shaft (4). A first movable column (22) is arranged in the first groove (21). The bottom end of the first movable column (22) is connected to the bottom inner wall of the first groove (21) through a first compression spring (23). A lifting frame (19) located below the lifting ring (14) is slidably sleeved on the outside of the rotating shaft (4). A guiding hole (24) is formed on the inner wall of the first groove (21). A first guiding block (25) is slidably arranged in the guiding hole (24), and the first guiding block (25) is fixedly connected to both the lifting frame (19) and the first movable column (22). The fixed block (18) is provided with a first sliding groove (20) adapted to the lifting frame (19).

5. The sampling device for groundwater detection according to claim 4, characterized in that, The stretching member includes a plurality of fixed columns (26) arranged above the first sealing disc (17). The bottom of the fixed column (26) is fixedly connected to the top of the movable seat (11). A second groove (27) is formed at the bottom of the fixed column (26). A second movable column (28) is slidably arranged in the second groove (27). The top end of the second movable column (28) is connected to the top inner wall of the second groove (27) through a stretching spring (29). The bottom end of the second movable column (28) penetrates through the movable seat (11), and the bottom end of the second movable column (28) is fixedly connected to the top of the first sealing disc (17).

6. The sampling device for groundwater detection according to claim 4, characterized in that, The magnetic adsorption fixing mechanism includes at least one iron block (30) fixedly installed at the bottom of the sampling box (2). A limiting sleeve (31) is slidably sleeved on the outside of the iron block (30). The bottom of the limiting sleeve (31) is fixedly connected to the top of the movable seat (11). A magnet block (32) is slidably arranged in the limiting sleeve (31). The top of the magnet block (32) is in contact with the bottom of the iron block (30). A guiding groove (33) is formed on the inner wall of the limiting sleeve (31). A second guiding block (34) is slidably arranged in the guiding groove (33), and the second guiding block (34) is fixedly connected to the corresponding magnet block (32). A movable plate (35) is arranged below the fixed block (18). The magnet block (32) and the movable plate (35) are connected through a connecting column (36), and the connecting column (36) penetrates through the movable seat (11).

7. The sampling device for groundwater detection according to claim 1, characterized in that, The driver includes a protective shell (37) fixedly installed at the top of the support base (1). The protective shell (37) is a cavity structure with an open bottom end. A first gear (38) is fixedly sleeved on the outside of the rotating shaft (4) and is located inside the protective shell (37). A servo motor (39) is fixedly connected to the top of the support base (1) and is located inside the protective shell (37). The output end of the servo motor (39) is fixedly connected to a second gear (40) meshing with the first gear (38).

8. The sampling device for groundwater detection according to claim 1, characterized in that, The translation pressing structure includes a sliding plate (41) fixedly installed on the movable seat (11). A number of second sliding grooves (42) are formed in the support seat (1), and one end of the sliding plate (41) away from the movable seat (11) is located in the corresponding second sliding groove (42). A first support column (43) is fixedly connected to the bottom of the movable seat (11). A second rotating frame (44) located below the support seat (1) is rotatably sleeved outside the rotating shaft (4). A number of support blocks (45) are fixedly connected to the top of the second rotating frame (44), and the number of support blocks (45) is the same as that of the first support columns (43). An inclined surface adapted to the first support column (43) is provided on the support block (45). A third damping disc (46) is fixedly connected to the top of the second rotating frame (44). A fourth damping disc (47) is fixedly sleeved outside the rotating shaft (4). The bottom of the fourth damping disc (47) is in contact with the top of the third damping disc (46). A sealing ring (48) is fixedly connected to the opening of the sampling box (2), and the sealing ring (48) is in contact with the outer wall of the shielding sleeve (6).

9. The sampling device for groundwater detection according to claim 4, wherein A second sealing disc (49) is provided in the sampling box (2). An air inlet hole (50) is formed in the inner wall of the top of the sampling box (2) above the second sealing disc (49). The top of the second sealing disc (49) is in contact with the inner wall of the top of the sampling box (2). A number of piston columns (51) are fixedly connected to the top of the second sealing disc (49). The top ends of the piston columns (51) are fixedly connected to a fixed disc (52) located above the sampling box (2). The fixed disc (52) and the sampling box (2) are connected by a second compression spring (53). A second support column (54) is fixedly connected to the top of the second sealing disc (49), and the second support column (54) penetrates through the air inlet hole (50). Above the rotating shaft (4), a pressing frame (55) adapted to the second support column (54) is provided, and the pressing frame (55) is fixedly connected to the top end of the first movable column (22).

10. The sampling device for groundwater detection according to claim 1, characterized in that, Above the shielding sleeve (6), an installation frame (56) is provided, and the installation frame (56) is fixedly connected to the support seat (1). A number of suspension rings (57) are fixedly connected to the top of the installation frame (56).

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