Sediment columnar sample sampling equipment in wave water tank experiment

Abstract

The invention discloses sediment columnar sample sampling equipment in a wave water tank experiment in the technical field of sampling devices, and the sediment columnar sample sampling equipment comprises a sampling barrel, a handle is fixedly connected to the top end of the sampling barrel, baffles are slidably connected to the two side walls of the sampling barrel, and first springs sleeve sliding parts of the baffles; the top ends of the baffles are rotationally connected with push rods, the push rods are rotationally connected with limiting pieces, and the limiting pieces are in sliding connection with the side wall of the sampling barrel; according to the sampling device, the two baffles and the sealing plate are located on the two sides during sampling, then the sampling barrel can be conveniently inserted into sediments, sampling is carried out on the premise that the insertion difficulty is reduced and the sediments are disturbed, and when the sampling barrel is sealed, the two baffles can firstly move to a state about to be attached so as to carry out primary sealing.

Description

Technical Field

[0001] The invention relates to the technical field of sampling devices, in particular to a sediment columnar sample sampling device in a wave flume experiment. Background Art

[0002] The wave tank experiment is an important scientific experiment, which is mainly used to simulate the wave environment and study the interaction between waves and various structures. It requires sampling of sediments for multi-faceted research.

[0003] There are many existing sampling methods. Taking the cylindrical sampling device as an example, the sampling is performed by directly inserting the sediment surface downward. This has the advantages of accurately controlling the sampling depth, obtaining the layer distribution of the sediment, and reducing the disturbance to the sediment. However, due to its open design at the bottom, the internal sediment will flow out of the sampling barrel when it is pulled out from the sediment, and water will enter the sampling barrel, which will cause the sediment to be more easily washed down by water. To solve this problem, two sealing plates are set on both sides of the port below the sampling barrel. After the sampling is completed, the sampling barrel is sealed by closing the two sealing plates. However, in use, sediment will be mixed between the side walls of the sealing plates after they are fitted, which will make the sealing plates unable to seal, but will form a gap. Then, when the sampling barrel is pulled out, the water above the sediment will drive the sediment to be washed out. Summary of the invention

[0004] The object of the present invention is to provide a sediment column sampling device in a wave flume experiment to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sediment columnar sampling device in a wave flume experiment, comprising a sampling barrel, a handle fixedly connected to the top of the sampling barrel, baffles slidably connected to both side walls of the sampling barrel, a first spring sleeved on the sliding portion of the baffle, a push rod rotatably connected to the top of the baffle, the push rods rotatably connected to a limiting member, the limiting members are slidably connected to the side walls of the sampling barrel, a sealing plate is slidably connected to the bottom end of one of the baffles, the side wall of the sealing plate is rotatably connected to a support rod, and the support rod is rotatably connected to the side wall of the sampling barrel. A push piece is connected, and the push piece is slidably connected to the baffle, and a second spring is fixedly connected between the push piece and the inner wall of the baffle, a driving rod is arranged above the push rod, the driving rod is U-shaped and is slidably connected to the handle, and two locking pieces are slidably connected to the inner wall of the sampling barrel, and a third spring is fixedly connected between the two locking pieces and the side walls of the sampling barrel, and the bottom end of the driving rod is wedge-shaped. When the driving rod descends, it can drive the push rod to rotate and make the baffle slide along the sampling barrel. When the push rod is in a vertical state, the bottom end of the driving rod will contact the push piece and make the push piece slide toward the inside of the baffle.

[0006] As a further solution of the present invention, both side walls of the driving rod are rotatably connected with rollers.

[0007] As a further solution of the present invention, a partition is slidably connected to the inner wall of the sampling cylinder, a driving spring is fixedly connected between the partition and the inner top wall of the sampling cylinder, the partition is slidably connected to a limit rod, the bottom end of the limit rod is located below the partition, the top of the limit rod passes through the partition and the sampling cylinder and is fixedly connected to the bottom of the driving rod, the limit rod is slidably connected to the partition and the sampling cylinder, a drain pipe is fixedly connected to the partition, the top of the drain pipe extends to the outside of the sampling cylinder, a one-way valve is arranged inside the drain pipe near the bottom, two blocks are slidably connected to the partition, a fourth spring is fixedly connected between the two blocks and the partition, the blocks are respectively arranged on one side of the two locking plates, and the top of the blocks are wedge-shaped.

[0008] As a further solution of the present invention, a filter membrane is arranged below the bottom end of the drain pipe, and a connecting ring is fixedly connected to the outside of the filter membrane, and the connecting ring is arranged in the middle of the partition.

[0009] As a further solution of the present invention, the connecting ring is slidably connected to the partition in the vertical direction, the bottom ends of the two clamping blocks are rotatably connected to pull rods, and the top ends of the pull rods are rotatably connected to the connecting ring.

[0010] As a further solution of the present invention, two filter screens are arranged below the connecting ring.

[0011] As a further solution of the present invention, a driving group is provided on one side of the filter screen, and the filter screen is rotatably connected to the bottom end of the partition;

[0012] The driving group includes a vertical rod, the vertical rod is slidably connected to a sliding plate in the vertical direction, the bottom end of the vertical rod is slidably connected to the sampling tube in the horizontal direction, the sliding plate is slidably connected to the top of the partition in the horizontal direction, and a fifth spring is fixedly connected between the sliding plate and the partition;

[0013] When the push rod rotates to contact the end of the vertical rod, it can push the vertical rod to slide into the sampling tube.

[0014] As a further solution of the present invention, sliding grooves are provided at positions of the side wall of the sampling tube corresponding to the two limiting members, and the two limiting members are slidably connected to the sampling tube through the sliding grooves.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, the two baffles and the sealing plate are located on both sides when sampling, so as to facilitate the insertion of the sampling tube into the sediment, reduce the difficulty of insertion, and perform sampling under the premise of not disturbing the sediment. When sealing the sampling tube, the two baffles will first move to a state of being about to fit for preliminary sealing, and then the sealing plate is pushed by the support rod to translate from the bottom of the baffle on one side to the bottom of the interval between the two baffles, and the sediment below is pushed away during the translation of the sealing plate, thereby completing the sealing, thereby avoiding the problem of poor sealing when the baffles are directly fitted in the traditional method, which causes the sediment to flow outward and causes the sediment to be washed away and the stratification to be destroyed.

[0017] 2. After the block passes over the locking plate, the fourth spring quickly drives the block to reset. At this time, the block will instantly pull the connecting ring down through the pull rod. As shown in the figure, the filter membrane is not a flat filtering surface, but has a certain curvature. Therefore, a vibration will be generated under the instantaneous pulling to make the filter membrane vibrate on the connecting ring, so that the impurities attached to the filter membrane can be quickly thrown out to avoid the solidification of a large number of attachments, which will cause inconvenience in cleaning and affect the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal structure of the sampling tube of the present invention;

[0020] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0021] Figure 4 It is a schematic diagram of the positional relationship between the driving rod, the push rod and the baffle of the present invention;

[0022] Figure 5 It is a schematic diagram of the positional relationship between the baffle, the support rod and the second spring of the present invention;

[0023] Figure 6 It is a schematic diagram of the positional relationship between the partition, the block and the vertical rod of the present invention;

[0024] Figure 7 It is a schematic diagram of the positional relationship between the partition plate and the drain pipe and the filter membrane and the filter screen of the present invention;

[0025] Figure 8 It is a schematic diagram of the positional relationship between the clamping block, the pull rod and the connecting ring of the present invention;

[0026] Fig. 9 Schematic diagram of the positional relationship between the filter membrane and the filter screen of the present invention;

[0027] Fig.10It is a schematic diagram of the positional relationship between the vertical rod, the filter screen and the sliding plate of the present invention;

[0028] Fig.11 It is a schematic diagram of the positional relationship between the filter screen, the connecting ring and the filter membrane of the present invention;

[0029] Fig.12 It is a schematic diagram of the vertical rod of the present invention pushing the filter screen to rotate to a horizontal state.

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0031] 1. Sampling tube; 2. Baffle; 3. First spring; 4. Push rod; 5. Limiting piece; 6. Sealing plate; 7. Support rod; 8. Push plate; 9. Driving rod; 10. Locking plate; 11. Third spring; 12. Roller; 13. Partition; 14. Driving spring; 15. Limiting rod; 16. Drain pipe; 17. Filter membrane; 18. Connecting ring; 19. Block; 20. Fourth spring; 21. Pull rod; 22. Filter screen; 23. Vertical rod; 24. Slide; 25. Fifth spring; 26. Slide groove; 27. Second spring. DETAILED DESCRIPTION

[0032] See also Figure 1-Figure 12 The present invention provides a technical solution: a sediment columnar sampling device in a wave flume experiment, comprising a sampling tube 1, a handle fixedly connected to the top of the sampling tube 1, baffles 2 slidably connected to both side walls of the sampling tube 1, a first spring 3 sleeved on the sliding part of the baffle 2, a push rod 4 rotatably connected to the top of the baffle 2, the push rod 4 rotatably connected to a limiting member 5, the limiting member 5 is slidably connected to the side wall of the sampling tube 1, a sealing plate 6 is slidably connected to the bottom end of one of the baffles 2, a support rod 7 is rotatably connected to the side wall of the sealing plate 6, the support rod 7 is rotatably connected to a push piece 8, and the push piece 8 It is slidably connected to the baffle 2, and a second spring 27 is fixedly connected between the push piece 8 and the inner wall of the baffle 2. A driving rod 9 is arranged above the push rod 4, and the driving rod 9 is U-shaped and slidably connected to the handle. Two locking pieces 10 are slidably connected to the inner wall of the sampling tube 1, and a third spring 11 is fixedly connected between the two locking pieces 10 and the side walls of the sampling tube 1. The bottom end of the driving rod 9 is wedge-shaped. When the driving rod 9 descends, it can drive the push rod 4 to rotate and make the baffle 2 slide along the sampling tube 1. After the push rod 4 is in a vertical state, the bottom end of the driving rod 9 will contact with the push piece 8 and make the push piece 8 slide toward the inside of the baffle 2.

[0033] The two side walls of the driving rod 9 are rotatably connected with rollers 12 .

[0034] like Figure 1-Figure 4 As shown:

[0035] When sampling, the sampling tube 1 is inserted into the sediment layer in the water tank by holding the handle. At this time, the sediment will enter the interior of the sampling tube 1 through the opening at the bottom of the sampling tube 1, and then the driving rod 9 is pushed to slide down along the handle. At this time, the locking plate 10 will maintain continuous contact with the side wall of the driving rod 9 when the driving rod 9 descends. When the driving rod 9 slides down, the roller 12 will squeeze one side of the push rod 4 to make it rotate around the limit member 5. At this time, the bottom end of the push rod 4 will push the baffle 2 to slide along the sampling tube 1 and compress the first spring 3. When the baffle 2 slides along the sampling tube 1, the limit member 5 will be driven by the push rod 4 to slide down along the sampling tube 1, thereby adapting to the sliding of the baffle 2. After the baffle 2 slides to the limit, the top and bottom ends of the push rod 4 are in a vertical state, and at this time, the bottom ends of the two baffles 2 will not fit together, but there will be a small gap. The setting of the gap can accommodate the sediment between the two, and then continue to press the driving rod 9 to the limit.

[0036] When the lever 7 is in a vertical position, the roller 12 will keep in contact with the lever 7 and rotate. When the driving lever 9 continues to descend, the wedge-shaped bottom end will contact the side wall of the push piece 8 and push the push piece 8 to slide toward the inside of the baffle 2. At this time, the push piece 8 will compress the second spring 27 and push the sealing plate 6 to slide horizontally along the baffle 2 to the position between the two baffles 2 through the lever 7. At this time, the gap between the two baffles 2 will be sealed from below. During the horizontal movement of the sealing plate 6, the sediment under the baffle 2 will be pushed to one side, while the sediment in the gap between the two baffles 2 will continue to be between the two baffles 2. Then, the two baffles 2 will be sealed. At this time, the sealing of the sampling tube 1 is completed. At this time, the vertical parts on both sides of the driving rod 9 will descend to the bottom of the locking plate 10. At this time, the locking plate 10 will be above the vertical part of the driving rod 9 driven by the third spring 10 to block the driving rod 9, and then the sampling tube 1 can be directly lifted.

[0037] When the sediment is discharged, the two locking plates 10 are manually pressed toward the inside of the sampling tube 1 to compress the third spring 11, and then the driving rod 9 is pulled upward, and the sealing plate 6 and the baffle 2 are reset in sequence;

[0038] In the present invention, the two baffles 2 and the sealing plate 6 are located on both sides when sampling, so as to facilitate the insertion of the sampling tube 1 into the sediment, reduce the difficulty of insertion, and perform sampling under the premise of disturbing the sediment. When sealing the sampling tube 1, the two baffles 2 will first move to a state of being about to fit together for preliminary sealing, and then the sealing plate 6 is pushed by the support rod 7 from below the baffle 2 on one side to below the interval between the two baffles 2, and the sediment below is pushed away during the translation of the sealing plate 6, thereby completing the sealing, thereby avoiding the problem of poor sealing when the baffle 2 is directly fitted in the traditional method, which causes the sediment to flow outward and causes the sediment to be washed away and the stratification to be destroyed.

[0039] A partition 13 is slidably connected to the inner wall of the sampling cylinder 1, and a driving spring 14 is fixedly connected between the partition 13 and the inner top wall of the sampling cylinder 1. The partition 13 is slidably connected to a limit rod 15, and the bottom end of the limit rod 15 is located below the partition 13. The top of the limit rod 15 passes through the partition 13 and the sampling cylinder 1 and is fixedly connected to the bottom of the driving rod 9. The limit rod 15 is slidably connected to the partition 13 and the sampling cylinder 1. A drain pipe 16 is fixedly connected to the partition 13, and the top of the drain pipe 16 extends to the outside of the sampling cylinder 1, and a one-way valve is arranged inside the drain pipe 16 near the bottom. Two blocks 19 are slidably connected to the partition 13, and a fourth spring 20 is fixedly connected between the two blocks 19 and the partition 13. The blocks 19 are respectively arranged on one side of the two locking plates 10, and the tops of the blocks 19 are wedge-shaped.

[0040] like Figure 2 , Figure 6 and Figure 7 As shown:

[0041] When the driving rod 9 drops to the limit, the wedge-shaped bottom end of the driving rod 9 pushes the push piece 8 to seal the gap between the sealing plate 6 and the baffle 2. At this time, the locking piece 11 will slide along the inner wall of the sampling tube 1 to the top of the vertical part of the driving rod 9 driven by the third spring 11 to lock the driving rod 9. At this time, the locking piece 10 will move from the bottom of the block 19 to the side of the block 19. At this time, the locking piece 10 releases the restriction on the block 19, and then the driving spring 14, which was originally in a compressed state, will quickly relax elastically to make the partition 13 slide down inside the sampling tube 1 along the limit rod 15. When the partition 13 drops During the process, the water in the upper layer of the sediment will be squeezed when the partition 13 descends, and the water will be discharged from the middle of the partition 13 to the outside of the sampling tube 1 through the drain pipe 16, so that the inside of the sampling tube 1 contains only sediment. The drain pipe 16 is a relatively long hose in actual use, and its middle position is between the upper part of the partition 13 and the inner top wall of the sampling tube 1. Its top and bottom ends are respectively arranged outside the sampling tube 1 and above the partition 13, so it can adapt to the lifting and lowering of the partition 13. A one-way valve is arranged inside the drain pipe 16, which can discharge the water inside the sampling tube 1 to the outside without the external water entering the inside of the sampling tube 1.

[0042] When the partition 13 descends to contact the surface of the sediment, it will stop. Although the sediment will be squeezed at this time, it will not hinder the layer distribution of the sediment, and will limit the sediment. When the water content inside the sampling tube 1 is reduced, it can prevent the sediment from flowing inside the sampling tube 1 due to large shaking during the process of the sampling tube 1 being lifted out of the water and moving (especially for sediments with more mud). It can also prevent the sediment from being directly washed away by water when the sediment is discharged, which is convenient for improving the sampling accuracy.

[0043] When the partition 13 is reset, that is, when the sediment is discharged, the driving rod 9 is pulled to drive the limit rod 15 to slide up. At this time, the bottom end of the limit rod 15 will drive the partition 13 to rise. At this time, the driving spring 14 will be compressed until the block 19 moves to the bottom of the locking plate 10, and the top of the block 19 will contact the locking plate 10. The end of the locking plate 10 is blocked by the driving rod 9, so the wedge-shaped top of the block 19 will be squeezed and slide along the partition 13 after contacting the locking plate 10. At this time, the fourth spring 20 will be compressed, and after the block 19 moves to the top of the locking plate 10, the fourth spring 20 drives the block 19 to reset. At this time, the locking plate 10 will lock the block 19, thereby fixing the position of the partition 13.

[0044] A filter membrane 17 is arranged below the bottom end of the drain pipe 16 , and a connecting ring 18 is fixedly connected to the outside of the filter membrane 17 . The connecting ring 18 is arranged in the middle of the partition plate 13 .

[0045] The connecting ring 18 is slidably connected to the partition plate 13 in the vertical direction. The bottom ends of the two clamping blocks 19 are rotatably connected to the pull rods 21, and the top ends of the pull rods 21 are rotatably connected to the connecting ring 18.

[0046] like Figure 6-Figure 9 As shown:

[0047] The filter membrane 17 is supported by the connecting ring 18. The filter membrane 17 can be made of sponge material, which can filter water before it enters the drain pipe 16 to prevent the sediment in the sediment from clogging the drain pipe 16.

[0048] When the block 19 rises to contact the locking plate 10, the block 19 will slide along the partition 13 and gradually compress the fourth spring 20. At this time, the block 19 will push the connecting ring 18 to slide up along the partition 13 through the pull rod 21. After the block 19 passes over the locking plate 10, the fourth spring 20 quickly drives the block 19 to reset. At this time, the block 19 will instantly pull the connecting ring 18 down through the pull rod 21. Fig. 9 As shown, the filter membrane 17 is not a flat filtering surface, but has a certain curvature, so a vibration will be generated under the instantaneous pulling, causing the filter membrane 17 to vibrate on the connecting ring 18, so that the impurities attached to the filter membrane 17 can be quickly thrown out, avoiding the solidification of a large number of attachments, causing inconvenience in cleaning and affecting the filtering effect.

[0049] Two filter screens 22 are arranged below the connecting ring 18 .

[0050] A drive group is provided on one side of the filter screen 22, and the filter screen 22 is rotatably connected to the bottom end of the partition 13;

[0051] The driving group includes a vertical rod 23, the vertical rod 23 is slidably connected with a slide plate 24 in the vertical direction, the bottom end of the vertical rod 23 is slidably connected with the sampling tube 1 in the horizontal direction, the slide plate 24 is slidably connected with the top end of the partition 13 in the horizontal direction, and a fifth spring 25 is fixedly connected between the slide plate 24 and the partition 13;

[0052] When the push rod 4 rotates to contact the end of the vertical rod 23 , it can push the vertical rod 23 to slide into the sampling tube 1 .

[0053] like Figure 7 , Figure 10-12 As shown:

[0054] A filter screen 22 is disposed below the connecting ring 18. The filter screen 22 is in a vertical position when not in operation. When the filter screen 22 is in the vertical position, the vertical rod 23 is located at one side of the filter screen 22.

[0055] When the driving rod 9 descends and forces the push rod 4 to rotate from the inclined state to the vertical state, the push rod 4 rotates to contact the bottom end of the vertical rod 23, and then pushes the vertical rod 23 to slide along the inside of the sampling tube 1. At this time, the vertical rod 23 drives the slide 24 to slide along the partition 13 and stretches the fifth spring 25. Because the vertical rod 23 needs to slide horizontally inside the partition 13, a through groove larger than the vertical rod 23 is opened on the partition 13. The slide 24 is used to seal the top of the through groove, and it can also be sealed while sliding. When the vertical rod 23 drives the slide plate 24 to slide, the vertical rod 23 will push the filter screen 22 to rotate. When the vertical rod 23 slides to the limit state, the vertical rod 23 will push the filter screen 22 to rotate to the horizontal state and the two filter screens 22 will fit together. Then the driving rod 9 will drop to the limit so that the sealing plate 6 will seal the bottom of the baffle 2. Then the locking plate 10 will move to the top of the vertical end of the driving rod 9 and release the restriction on the block 19. The block 19 will follow the partition 13 to drop. The drainage work will be carried out during the drop of the partition 13.

[0056] Large impurities are filtered through the filter screen 22 to prevent the impurities from sticking to the filter membrane 17 and affecting the drainage effect;

[0057] When the sediment is discharged after the sampling tube 1 is brought out, the locking plate 10 is manually pushed to move and the driving rod 9 is pulled up. At this time, the driving rod 9 will block the locking plate 10, and the baffle 2 will gradually separate to discharge the sediment, and the limiting rod 15 will also drive the partition 13 to rise. As the push rod 4 rotates from the inclined state to the vertical state, the vertical rod 23 will follow the sliding plate 24 to reset under the pulling action of the fifth spring 25, and then rotate to the vertical state. After the block 19 contacts the locking plate 10 and passes over the locking plate 10, the filter membrane 17 will vibrate under the action of the instantaneous reset of the block 19 to throw off the mud impurities attached to the top. At this time, the filter screen 22 rotates to a vertical state, thereby preventing impurities from solidifying on the filter screen 22 (a torsion spring can be set on the rotating shaft of the filter screen 22 to prevent the filter screen 22 from shaking in the vertical state).

[0058] Slide grooves 26 are provided at positions of the side wall of the sampling tube 1 corresponding to the two stoppers 5 , and the two stoppers 5 are slidably connected to the sampling tube 1 via the slide grooves 26 .

[0059] like Figure 3 As shown:

[0060] The sliding groove 26 can facilitate the sliding of the limiting member 5 .

Claims

1. A sediment column sampling device in a wave flume experiment, comprising a sampling tube (1), wherein a handle is fixedly connected to the top of the sampling tube (1), characterized in that: The two side walls of the sampling tube (1) are slidably connected with baffles (2), the sliding parts of the baffles (2) are sleeved with first springs (3), the tops of the baffles (2) are rotatably connected with push rods (4), the push rods (4) are rotatably connected with limit members (5), the limit members (5) are slidably connected with the side walls of the sampling tube (1), the bottom end of one of the baffles (2) is slidably connected with a sealing plate (6), the side wall of the sealing plate (6) is rotatably connected with a support rod (7), the support rod (7) is rotatably connected with a push piece (8), the push piece (8) is slidably connected with the baffle (2), and the push piece (8) is fixed to the inner wall of the baffle (2). A second spring (27) is connected, a driving rod (9) is arranged above the push rod (4), the driving rod (9) is U-shaped and is slidably connected to the handle, two locking plates (10) are slidably connected to the inner wall of the sampling tube (1), and a third spring (11) is fixedly connected between the two locking plates (10) and the side walls of the sampling tube (1), the bottom end of the driving rod (9) is wedge-shaped, and when the driving rod (9) is lowered, it can drive the push rod (4) to rotate and make the baffle (2) slide along the sampling tube (1), and when the push rod (4) is in a vertical state, the bottom end of the driving rod (9) will contact the push plate (8) and make the push plate (8) slide toward the inside of the baffle (2).

2. The sediment column sampling device in a wave flume experiment according to claim 1, characterized in that: The two side walls of the driving rod (9) are rotatably connected with rollers (12).

3. The sediment column sampling device in a wave flume experiment according to claim 1, characterized in that: The inner wall of the sampling tube (1) is slidably connected to a partition (13), a driving spring (14) is fixedly connected between the partition (13) and the inner top wall of the sampling tube (1), the partition (13) is slidably connected to a limiting rod (15), the bottom end of the limiting rod (15) is located below the partition (13), the top end of the limiting rod (15) passes through the partition (13) and the sampling tube (1) and is fixedly connected to the bottom of the driving rod (9), the limiting rod (15) is slidably connected to the partition (13) and the sampling tube (1) The partition (13) is fixedly connected with a drain pipe (16), the top end of the drain pipe (16) extends to the outside of the sampling tube (1), and a one-way valve is arranged inside the drain pipe (16) near the bottom end. Two clamping blocks (19) are slidably connected to the partition (13), and a fourth spring (20) is fixedly connected between the two clamping blocks (19) and the partition (13). The clamping blocks (19) are respectively arranged on one side of the two locking plates (10), and the top ends of the clamping blocks (19) are wedge-shaped.

4. The sediment column sampling device in a wave flume experiment according to claim 3, characterized in that: A filter membrane (17) is arranged below the bottom end of the drainage pipe (16), and a connecting ring (18) is fixedly connected to the outside of the filter membrane (17), and the connecting ring (18) is arranged in the middle of the partition plate (13).

5. The sediment column sampling device in the wave flume experiment according to claim 4, characterized in that: The connecting ring (18) is slidably connected to the partition (13) in the vertical direction, the bottom ends of the two clamping blocks (19) are rotatably connected to the pull rods (21), and the top ends of the pull rods (21) are rotatably connected to the connecting ring (18).

6. The sediment column sampling device in the wave flume experiment according to claim 5, characterized in that: Two filter screens (22) are arranged below the connecting ring (18).

7. The sediment column sampling device in the wave flume experiment according to claim 6, characterized in that: A driving group is provided on one side of the filter screen (22), and the filter screen (22) is rotatably connected to the bottom end of the partition plate (13); The driving group comprises a vertical rod (23), the vertical rod (23) is slidably connected to a sliding plate (24) in the vertical direction, the bottom end of the vertical rod (23) is slidably connected to the sampling tube (1) in the horizontal direction, the sliding plate (24) is slidably connected to the top end of the partition (13) in the horizontal direction, and a fifth spring (25) is fixedly connected between the sliding plate (24) and the partition (13); When the push rod (4) rotates to contact the end of the vertical rod (23), it can push the vertical rod (23) to slide towards the inside of the sampling tube (1).

8. The sediment column sampling device in a wave flume experiment according to claim 1, characterized in that: A slide groove (26) is provided at positions corresponding to the side wall of the sampling tube (1) and the two limiting members (5), and the two limiting members (5) are slidably connected to the sampling tube (1) via the slide groove (26).

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