A cofferdam filling detection sampling device

Abstract

The utility model relates to the field of water conservancy construction technology discloses a cofferdam filling detection sampling device, including sampling cylinder, the bottom of sampling cylinder is open and is arranged, and the opening module that sampling cylinder is equipped with can open or close, sampling cylinder top is equipped with the balance hole that communicates with its inside, and the bottom of sampling cylinder is equipped with a plurality of insertion teeth between the bottom of opening module, and the top of sampling cylinder is equipped with the rotating part that can drive sampling cylinder together displacement, sampling cylinder is equipped with the bottom support module, and the bottom support module includes the bottom support spare that rotates and connects in the inside of sampling cylinder, and the bottom support spare is close to the bottom of sampling cylinder, and the connecting piece is equipped on the bottom support spare, and the top end of connecting piece is located in the outside of sampling cylinder. The utility model can cut the bottom outer circle of soil sample after soil sample enters the inside of sampling cylinder, and can let the bottom support module normally lift and support the bottom of soil sample according to the characteristics that cofferdam filling soil density is high, and then conveniently let soil sample move out from soil with sampling cylinder.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy construction technology, specifically to a sampling device for testing cofferdam filling. Background Technology

[0002] A cofferdam is a temporary retaining structure built in water conservancy projects to construct permanent water conservancy facilities. Its function is to prevent water and soil from entering the construction site of the building, so as to facilitate drainage, excavation of foundation pits, and construction of buildings within the cofferdam. The quality of the cofferdam is closely related to the quality of the soil filling. Therefore, after the filling and compaction are completed, it is necessary to take samples from multiple areas for testing and analyze the samples to determine whether the filling quality meets the requirements.

[0003] Currently, a utility model patent with announcement number CN210487311U discloses a sampling device for testing cofferdam filling. The device includes a sampling cylinder and a connecting block integrally formed at its top. A manual rod is fixed to the upper part of the connecting block. A strip-shaped hole is opened on the side wall of the sampling cylinder, and sliding grooves are opened on both sides of the strip-shaped hole. A matching arc-shaped insert plate is slidably connected to the strip-shaped hole through the sliding grooves. A magnet for fixing the arc-shaped insert plate is embedded in the top of the strip-shaped hole. A rotating groove is set in the center of the top of the strip-shaped hole, and a moving block is hinged and fixed inside the rotating groove. By setting an easily detachable arc-shaped insert plate in the sampling cylinder, the soil sample does not need to be removed during sampling and observation, maintaining the integrity of the sample and ensuring the accuracy of subsequent analysis results, thus improving the efficiency of analysis and sampling.

[0004] In existing technologies, when testing soil in cofferdam filling, it is usually necessary to insert a sampling tool into the soil and then pull out the soil sample along with the sampling tool to obtain the soil sample to be tested. However, in the above-mentioned technical solution, the soil sample does not need to be removed, allowing it to remain inside the sampling tool in its complete shape for testing, ensuring the accuracy of the analytical structure. However, cofferdam filling soil differs from conventional soil. Due to its generally higher density and more stable interparticle connections, it is difficult to separate the bottom of the soil sample from the underlying soil layer by slight shaking, as is the case in conventional soil. Greater resistance needs to be overcome to reduce the degree of connection between the bottom of the soil sample and the underlying soil layer. If the separation degree is not high, the sampling tool may be pulled out of the soil, but the soil sample may remain in place. To improve the ease and convenience of sampling, this application provides a sampling device for testing cofferdam filling to solve the above problems. Utility Model Content

[0005] Based on the above description, this utility model provides a sampling device for cofferdam filling detection, in order to solve the problem that the existing soil sampling devices are inconvenient to operate when used for sampling soils with high density, such as those used for cofferdam filling.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a sampling device for testing cofferdam filling, including a sampling tube with an open bottom and an opening module that can be opened or closed on the sampling tube. The top of the sampling tube is provided with a balance hole that communicates with its interior. Several insertion teeth are provided between the bottom of the sampling tube and the bottom of the opening module. The top of the sampling tube is provided with a rotating part that can drive the sampling tube to move together. The sampling tube is equipped with a bottom support module, which includes a bottom support component rotatably connected inside the sampling tube. The bottom support component is close to the bottom of the sampling tube, and a connector is provided on the bottom support component. The top of the connector is located outside the sampling tube.

[0007] Through the above technical solution, the outer side of the sampling tube can be opened or closed through the opening module, allowing the soil sample inside to be exposed to the outside world; the balance hole allows airflow inside and outside to pass through; the insertion teeth allow the sampling tube to easily enter the soil; the moving connector can drive the bottom support to support the bottom of the soil sample, thus giving the bottom of the soil sample a support point, making it easy to move out with the sampling tube.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the rotating part includes a fixing rod located at the top of the sampling cylinder, the fixing rod being located at the center of the top of the sampling cylinder, and a crossbar being provided at the top of the fixing rod.

[0010] With the above technical solution, by holding and rotating the horizontal bar, the sampling cylinder can be rotated together with the fixed rod.

[0011] Furthermore, the bottom support includes two recovery slots opened inside the sampling cylinder, and a bottom support block is hinged in the recovery slot by a pin. The bottom support block has several bottom support teeth on its top. A connecting plate is provided on the outside of the bottom support block, and a counterweight block is provided on the bottom of the connecting plate away from the corresponding bottom support block. A limiting block is provided in the recycling trough, and the two limiting blocks are located on opposite sides of the two bottom support blocks.

[0012] The above technical solution enables the limiting block to restrict the rotation of the corresponding bottom support block.

[0013] Furthermore, the bottom support tooth is in the shape of a triangular prism, and the side of the bottom support tooth near the corresponding limiting block is a plane. The bottom support tooth is located inside the recycling tank. The sampling cylinder has two movable cavities, each with an open top. The movable cavities are connected to the interior of the corresponding recycling tank. The connecting plate is located between the recycling tank and the interior of the movable cavity, and the top of the connecting plate can abut against the outside of the limiting block.

[0014] The above technical solution enables the bottom of the soil sample to be supported by a planar structure; the connector can move within the movable cavity and drive the connecting plate to abut against the limiting block.

[0015] Furthermore, the connector includes a connecting rope disposed on the side of the connecting plate near the corresponding counterweight, the connecting rope being located inside the corresponding movable cavity, the top end of the connecting rope being provided with a movable rod, and the connecting rope being in a straight line between the corresponding connecting plate and the movable rod; The top of the movable rod is provided with a pull rod, which is inserted into and slidably connected to the inside of the corresponding movable cavity. The length of the pull rod is greater than the inner diameter of the movable cavity.

[0016] The above technical solution allows the movable rod to slide within the movable cavity and pulls the connecting plate upwards via the connecting rope.

[0017] Furthermore, the connector includes a linkage rope located on the side of the connecting plate near the corresponding counterweight, with a linkage rod at the top of the linkage rope, and a sliding sleeve slidably connected to the outside of the fixed rod.

[0018] The above technical solution allows the sliding sleeve to slide on the outside of the fixed rod.

[0019] Furthermore, the opposite ends of the two linkage rods are connected to the outer side of the sliding sleeve, and the linkage rope is in a straight line between the corresponding connecting plate and the linkage rod.

[0020] The above technical solution allows the linkage rod and the sliding sleeve to move together, thereby simultaneously pulling the two linkage ropes upward.

[0021] Furthermore, the opening module includes a baffle plate, with limiting slides on both sides of the baffle plate, a toggle block on the front of the baffle plate, and a positioning block on the top of the baffle plate. The sampling tube has a connecting port on the front, and the bottom of the connecting port is open. There are two sliding grooves on the bottom of the sampling tube, and the inside of the sliding grooves is connected to the inside of the connecting port. A positioning bolt is inserted through the front of the sampling tube.

[0022] The above technical solution allows soil samples from inside the sampling tube to be displayed to the outside through the connection port.

[0023] Furthermore, the connecting port is for the baffle plate to be inserted and slid, and the two sliding grooves are respectively for the two limiting slide bars to be inserted and slid; The sampling tube has a positioning cavity inside, which is connected to the interior of the connecting port. The positioning cavity is for the positioning block to be inserted. The positioning block has an internal threaded hole on its front side for the positioning bolt to be threaded.

[0024] The above technical solution enables the positioning block to be limited by the cooperation of the internal threaded hole and the positioning bolt, thereby allowing the baffle plate to block the connecting port.

[0025] Furthermore, the insertion tooth is fixed between the bottom of the sampling tube and the baffle plate, and the insertion tooth is crescent-shaped with a cutting edge on the outer side; The sampling tube and the shield are combined to form a cylindrical structure, and the insertion teeth are arranged in a circle between the bottom of the sampling tube and the shield.

[0026] The above technical solution allows the insertion teeth to smoothly cut into the soil, making it easier to perform the pressing action.

[0027] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: 1. By using the same orientation of the insertion teeth, the sampling tube can easily break through the soil surface when rotated according to the orientation of the insertion teeth, making the process of inserting the sampling tube into the soil easy and simple; the setting of the balance hole can keep the airflow inside and outside the tube circulating, thereby balancing the air pressure inside and outside the tube, allowing the soil inside the sampling tube to enter smoothly. 2. The opening module allows the soil sample placed inside the sampling tube to be directly exposed to the outside environment, enabling it to be used directly for testing. The bottom support module can cut the bottom outer ring of the soil sample after it enters the sampling tube. Based on the high density of the soil in the cofferdam filling, the bottom support module can properly support the bottom of the soil sample, providing a stress point and facilitating the removal of the soil sample directly from the soil along with the sampling tube. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a cofferdam filling detection and sampling device provided in Embodiment 1 of this utility model; Figure 2 This is a schematic diagram showing the separation of the sampling cylinder and the baffle plate in Embodiment 1 of this utility model; Figure 3 This is a front view schematic diagram of Embodiment 1 of the present utility model; Figure 4 This is a bottom view of Embodiment 1 of the present invention; Figure 5 This is a cross-sectional schematic diagram of Embodiment 1 of the present utility model; Figure 6 This is an embodiment of the present utility model. Figure 5 A magnified view of part A in the middle; Figure 7 This is a schematic diagram of the connection structure of the bottom support block in an embodiment of this utility model; Figure 8This is a schematic diagram of the overall structure of Embodiment 2 of this utility model; Figure 9 This is a cross-sectional schematic diagram of Embodiment 2 of this utility model.

[0029] Attached reference numerals: 1. Sampling cylinder; 11. Balance hole; 2. Opening module; 21. Baffle plate; 22. Limiting slide bar; 23. Toggle block; 24. Positioning block; 25. Connecting port; 26. Sliding groove; 27. Positioning bolt; 3. Insert teeth; 4. Rotating part; 41. Fixed rod; 42. Crossbar; 5. Bottom support module; 51. Recycling trough; 52. Bottom support block; 53. Bottom support teeth; 54. Connecting plate; 55. Counterweight block; 56. Limiting block; 57. Movable cavity; 58. Connecting rope; 59. Movable rod; 510. Pull rod; 61. Linkage rope; 62. Linkage rod; 63. Sliding sleeve. Detailed Implementation

[0030] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Example 1:

[0032] refer to Figure 1 and Figure 2A sampling device for cofferdam filling detection includes a sampling cylinder 1 with an open bottom. The sampling cylinder 1 has an opening module 2 that can be opened or closed, allowing the outside of the sampling cylinder 1 to be exposed to the outside environment. A balance hole 11, connected to the inside of the sampling cylinder 1, is located at the top, allowing airflow between the inside and outside to maintain air pressure balance and facilitate soil sample entry. Several insertion teeth 3 are located between the bottom of the sampling cylinder 1 and the bottom of the opening module 2. The top of the sampling cylinder 1 has a... The rotating part 4 moves together with the sampling cylinder 1, and drives the sampling cylinder 1 to rotate and press down together, so that the insertion teeth 3 can cut the soil and allow the sampling cylinder 1 to be inserted into the soil. The sampling cylinder 1 is provided with a bottom support module 5, which includes a bottom support member rotatably connected to the inside of the sampling cylinder 1. The bottom support member is close to the bottom of the sampling cylinder 1, and a connector is provided on the bottom support member. The top of the connector is located on the outside of the sampling cylinder 1. By moving the connector, the bottom support member can be driven to support the bottom of the soil sample, so that the bottom of the soil sample can have a support point and make it easy to move out with the sampling cylinder 1.

[0033] refer to Figure 2 and Figure 3 The rotating part 4 includes a fixed rod 41 located at the top of the sampling cylinder 1. The fixed rod 41 is located at the center of the top of the sampling cylinder 1. A crossbar 42 is provided at the top of the fixed rod 41. By holding the crossbar 42 and rotating it, the sampling cylinder 1 can be rotated together through the fixed rod 41, which facilitates the rotation and pressing action.

[0034] refer to Figure 5 and Figure 6 The bottom support includes two recovery slots 51 located inside the sampling cylinder 1. A bottom support block 52 is hinged to the recovery slot 51 by a pin. The bottom support block 52 has several bottom support teeth 53 on its top, allowing it to rotate within the recovery slot 51. A connecting plate 54 is provided on the outside of the bottom support block 52. A counterweight block 55 is provided on the bottom of the connecting plate 54 away from the corresponding bottom support block 52. The counterweight block 55 can drive the bottom support block 52 to be located inside the corresponding recovery slot 51 via the connecting plate 54. A limiting block 56 is provided inside the recovery slot 51. Two limiting blocks 56 are located on opposite sides of the two bottom support blocks 52, allowing the limiting blocks 56 to restrict the rotation of the corresponding bottom support block 52.

[0035] refer to Figure 6 and Figure 7The bottom support tooth 53 is shaped like a triangular prism. The side of the bottom support tooth 53 near the corresponding limiting block 56 is flat, and the other side is a conical part in the shape of a triangular prism. The conical part allows the bottom support tooth 53 to be inserted into the soil sample more easily. The bottom support tooth 53 is located inside the recovery trough 51. After rotation, the side of the bottom support tooth 53 near the corresponding limiting block 56 will directly support the bottom of the soil sample, so that the bottom of the soil sample can be supported by the flat structure. Two movable cavities 57 are opened in the sampling tube 1. The top of the movable cavity 57 is open. The movable cavity 57 is connected to the interior of the corresponding recovery trough 51. The connecting plate 54 is located between the recovery trough 51 and the interior of the movable cavity 57. The top of the connecting plate 54 can abut against the outside of the limiting block 56, allowing the connecting piece to move in the movable cavity 57 and drive the connecting plate 54 to abut against the limiting block 56.

[0036] It should be noted that in the natural state, the counterweight 55 drives the bottom support block 52 to be located inside the corresponding recycling trough 51 through the connecting plate 54. At this time, the bottom support block 52 is in a vertical state. When the connecting plate 54 abuts against the corresponding limiting block 56, the bottom support block 52 is parallel to the horizontal plane, so that the limiting block 56 can limit the rotation of the connecting plate 54 and can keep the bottom support block 52 in a state parallel to the horizontal plane to support the bottom of the soil sample.

[0037] refer to Figure 5 and Figure 6 The connecting component includes a connecting rope 58 located on the side of the connecting plate 54 near the corresponding counterweight 55. The connecting rope 58 is located inside the corresponding movable cavity 57. The top end of the connecting rope 58 is provided with a movable rod 59. The connecting rope 58 is in a straight line between the corresponding connecting plate 54 and the movable rod 59, so that the connecting rope 58 can move within the corresponding movable cavity 57. The top end of the movable rod 59 is provided with a pull rod 510. The movable rod 59 is inserted into and slidably connected to the inside of the corresponding movable cavity 57. The length of the pull rod 510 is greater than the inner diameter of the movable cavity 57. By pulling the pull rod 510, the movable rod 59 can slide within the movable cavity 57, and the connecting plate 54 can be rotated upward by pulling the connecting rope 58.

[0038] It should be noted that the connecting rope 58 can be a steel cable, which can stably pull the connecting plate 54 to rotate upward, and the connecting rope 58 can be in an inclined state when the connecting plate 54 abuts against the corresponding limiting block 56.

[0039] In use, after the sampling tube 1 enters the soil, pull the lever 510, causing the movable rod 59 to slide within the corresponding movable cavity 57, allowing the connecting rope 58 to pull the connecting plate 54 and its bottom support block 52 to rotate. Due to the triangular prism shape of the bottom support teeth 53, the bottom support teeth 53 will first insert into the soil sample, followed by the bottom support block 52 entering the soil sample through the part cut by the bottom support teeth 53. Rotating the sampling tube 1 causes the bottom support teeth 53 and the bottom support block 52 to rotate together around the bottom of the soil sample, achieving a circumferential cut on the outer side of the soil sample bottom, allowing the outer side of the soil sample bottom to separate from the underlying soil layer. Pulling the sampling tube 1 upwards, under the characteristics of highly compacted soil, the top planes of the bottom support block 52 and the bottom support teeth 53 can provide good support, thus providing some support to the bottom of the soil sample, allowing the soil sample to be removed from the soil along with the sampling tube 1.

[0040] refer to Figure 2 and Figure 3 The opening module 2 includes a shield 21, with limiting slides 22 on both sides of the shield 21, a toggle block 23 on the front of the shield 21, and a positioning block 24 on the top of the shield 21. The front of the sampling tube 1 has a connecting port 25, which allows the soil sample inside the sampling tube 1 to be displayed to the outside through the connecting port.

[0041] refer to Figure 2 and Figure 3 The bottom of the connecting port 25 is open, and the bottom of the sampling cylinder 1 has two sliding grooves 26. The inside of the sliding grooves 26 is connected to the inside of the connecting port 25. The connecting port 25 is for the shielding plate 21 to be inserted and slide. The two sliding grooves 26 are respectively for the two limiting slide strips 22 to be inserted and slide, so that the shielding plate 21 and the limiting slide strips 22 can slide inside the connecting port 25 and the sliding grooves 26 respectively. The sampling cylinder 1 has a positioning cavity, which is connected to the inside of the connecting port 25. The positioning cavity is for the positioning block 24 to be inserted, so that the positioning block 24 can enter the interior of the positioning cavity normally. The front of the sampling cylinder 1 is provided with a positioning bolt 27. The front of the positioning block 24 has an internal thread hole, which is for the positioning bolt 27 to be threaded. The internal thread hole and the positioning bolt 27 can limit the positioning block 24, so that the shielding plate 21 can block the connecting port 25.

[0042] refer to Figure 3 and Figure 4The insertion teeth 3 are fixed between the bottom of the sampling tube 1 and the shield 21. The insertion teeth 3 are crescent-shaped and the outer side of the insertion teeth 3 is a cutting edge. The sampling tube 1 and the shield 21 are combined into a cylindrical structure. The insertion teeth 3 are arranged in a circle between the bottom of the sampling tube 1 and the shield 21. With the circumferentially arranged insertion teeth 3, when the sampling tube 1 rotates in the direction of the cutting edge of the insertion teeth 3, the insertion teeth 3 can smoothly cut into the soil, and thus make it easier to perform the pressing action. Example 2:

[0043] refer to Figure 8 and Figure 9 This embodiment is largely the same as Embodiment 1, except that the connecting member includes a linkage rope 61 located on the side of the connecting plate 54 near the corresponding counterweight 55. The top of the linkage rope 61 is provided with a linkage rod 62. A sliding sleeve 63 is slidably connected to the outside of the fixed rod 41, allowing the sliding sleeve 63 to slide on the outside of the fixed rod 41. The opposite ends of the two linkage rods 62 are connected to the outside of the sliding sleeve 63, allowing the linkage rods 62 and the sliding sleeve 63 to move together, thereby simultaneously pulling the two linkage ropes 61 upward.

[0044] refer to Figure 8 and Figure 9 The linkage rope 61 is in a straight line between the corresponding connecting plate 54 and the linkage rod 62, so that the linkage rod 62 can pull the connecting plate 54 to rotate through the linkage rope 61. When cutting the bottom outer side of the soil sample through the bottom block 52, the crossbar 42 and the two linkage rods 62 can be held at the same time, making the whole operation process more convenient and in line with the operation logic.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sampling device for testing cofferdam filling, comprising a sampling tube (1), the bottom of the sampling tube (1) being open, and an opening module (2) that can be opened or closed on the sampling tube (1); Its features are, The top of the sampling tube (1) is provided with a balance hole (11) that communicates with its interior. Several insertion teeth (3) are provided between the bottom of the sampling tube (1) and the bottom of the opening module (2). The top of the sampling tube (1) is provided with a rotating part (4) that can drive the sampling tube (1) to move together. The sampling tube (1) is provided with a bottom support module (5). The bottom support module (5) includes a bottom support component that is rotatably connected to the inside of the sampling tube (1). The bottom support component is close to the bottom of the sampling tube (1). The bottom support component is provided with a connector, and the top of the connector is located outside the sampling tube (1).

2. The sampling device for detecting cofferdam filling according to claim 1, characterized in that, The rotating part (4) includes a fixing rod (41) located at the top of the sampling cylinder (1). The fixing rod (41) is located at the center of the top of the sampling cylinder (1), and a crossbar (42) is provided at the top of the fixing rod (41).

3. The sampling device for detecting cofferdam filling according to claim 2, characterized in that, The bottom support includes two recovery slots (51) opened inside the sampling cylinder (1), and a bottom support block (52) is hinged in the recovery slot (51) by a pin. The bottom support block (52) has several bottom support teeth (53) on its top. The bottom support block (52) is provided with a connecting plate (54) on the outside. The bottom of the connecting plate (54) is provided with a counterweight block (55) on the side away from the corresponding bottom support block (52). The recycling trough (51) is provided with a limiting block (56). The two limiting blocks (56) are located on opposite sides of the two bottom support blocks (52).

4. The sampling device for detecting cofferdam filling according to claim 3, characterized in that, The bottom support tooth (53) is a triangular prism in shape. The side of the bottom support tooth (53) closest to the corresponding limiting block (56) is a plane. The bottom support tooth (53) is located inside the recycling tank (51). The sampling tube (1) has two movable cavities (57) inside. The top of the movable cavity (57) is open. The movable cavity (57) is connected to the interior of the corresponding recycling tank (51). The connecting plate (54) is located between the interior of the recycling tank (51) and the movable cavity (57). The top of the connecting plate (54) can abut against the outside of the limiting block (56).

5. A sampling device for detecting cofferdam filling according to claim 4, characterized in that, The connector includes a connecting rope (58) located on the side of the connecting plate (54) near the corresponding counterweight (55). The connecting rope (58) is located inside the corresponding movable cavity (57). The top of the connecting rope (58) is provided with a movable rod (59). The connecting rope (58) is in a straight line between the corresponding connecting plate (54) and the movable rod (59). The top of the movable rod (59) is provided with a pull rod (510). The movable rod (59) is inserted into and slidably connected to the interior of the corresponding movable cavity (57). The length of the pull rod (510) is greater than the inner diameter of the movable cavity (57).

6. The sampling device for detecting cofferdam filling according to claim 4, characterized in that, The connector includes a linkage rope (61) located on the side of the connecting plate (54) near the corresponding counterweight (55), and a linkage rod (62) is provided at the top of the linkage rope (61). A sliding sleeve (63) is slidably connected to the outside of the fixed rod (41).

7. The sampling device for detecting cofferdam filling according to claim 6, characterized in that, The opposite ends of the two linkage rods (62) are connected to the outside of the sliding sleeve (63), and the linkage rope (61) is in a straight line between the corresponding connecting plate (54) and the linkage rod (62).

8. A sampling device for detecting cofferdam filling according to any one of claims 1-7, characterized in that, The opening module (2) includes a baffle plate (21), with limiting slides (22) on both sides of the baffle plate (21), a toggle block (23) on the front of the baffle plate (21), and a positioning block (24) on the top of the baffle plate (21). The sampling tube (1) has a connecting port (25) on its front side, and the bottom of the connecting port (25) is open. The bottom of the sampling tube (1) has two sliding grooves (26), and the interior of the sliding grooves (26) is connected to the interior of the connecting port (25). The front side of the sampling tube (1) is provided with a positioning bolt (27).

9. A sampling device for detecting cofferdam filling according to claim 8, characterized in that, The connecting port (25) is for the baffle plate (21) to be inserted and slid, and the two sliding grooves (26) are respectively for the two limiting slide bars (22) to be inserted and slid. The sampling tube (1) has a positioning cavity inside, which is connected to the interior of the connecting port (25). The positioning cavity is for the positioning block (24) to be inserted. The positioning block (24) has an internal threaded hole on its front side, which is for the positioning bolt (27) to be threaded.

10. A sampling device for detecting cofferdam filling according to claim 8, characterized in that, The insertion tooth (3) is fixed between the bottom of the sampling tube (1) and the baffle plate (21). The insertion tooth (3) is crescent-shaped and the outer side of the insertion tooth (3) is a cutting edge. The sampling tube (1) and the baffle plate (21) are combined to form a cylindrical structure, and the insertion teeth (3) are arranged in a circle between the bottom of the sampling tube (1) and the baffle plate (21).

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