River channel wall sampling device and method

Abstract

The invention provides a riverway wall sampling device and method. The riverway wall sampling device comprises a positioning mechanism, a positioning supporting mechanism and a sampling mechanism. According to the river wall sampling device and method provided by the invention, the positioning part of the positioning mechanism can be opened and closed, and can accurately abut against a to-be-sampled position in a closed state, so that a reference point is provided for subsequent sampling. A plurality of supporting parts of the positioning and supporting mechanism can synchronously pitch and can be adaptively adjusted according to an arc-shaped structure of a riverway wall surface, so that each supporting part is attached to the side wall of the wall body, the normal direction of the sampling device and the surface of the wall body is determined, and a sampling drill bit or a coring cylinder is prevented from inclining. The sampling mechanism is coaxially arranged in the sampling barrel cavity in a sliding mode, it is guaranteed that the sampling process is conducted along the correct axis, the perpendicularity and integrity of samples are guaranteed, sample deformation and depth deviation are reduced, the sampling precision is improved, and adaptability and practicability are good.

Description

Technical Field

[0001] This invention belongs to the field of river engineering quality testing technology, specifically relating to a river wall sampling device and method. Background Technology

[0002] In the quality assessment, safety monitoring, and restoration design of river engineering projects, it is necessary to collect samples from riverbanks, embankments, retaining walls, and other structures (such as concrete, masonry, earthen embankments, and composite walls) to test the physical and mechanical properties, chemical composition, and structural defects of the wall materials. River wall sampling refers to collecting samples from the walls (such as slope protection and revetment structures) on both sides of the river to test the performance, structural stability, and durability of the wall materials, providing a basis for the maintenance, restoration, or new construction of river engineering projects.

[0003] In existing technologies, when sampling riverbank walls, core drills are typically used to obtain cylindrical core samples to ensure that the samples reflect the overall properties of the material. However, when sampling curved walls, it is difficult to visually determine the direction of the sampling device relative to the curved surface during manual operation. This can lead to tilting of the sampling drill bit or core tube, resulting in sample deformation, sampling depth deviation, and even damage to the wall structure. This affects the accuracy of the test results and the safety of the wall, resulting in poor adaptability and practicality. Summary of the Invention

[0004] This invention provides a river wall sampling device and method, which aims to solve the problem that the sampling position and sampling angle are prone to deviation when sampling river walls in existing methods.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a method for sampling riverbed walls, comprising: The positioning mechanism has a sampling cylinder cavity with an open top and a hollow interior. The bottom of the sampling cylinder cavity has an openable and closable positioning part. When the positioning part is closed, it abuts against the sampling wall on the river wall. A positioning support mechanism is detachably sleeved on the positioning mechanism. The positioning support mechanism has multiple support parts that can be synchronously pitched. The hinge ends of each support part are arranged in a ring at intervals along the axis of the sampling cylinder cavity, and the hinge axis of each support part is arranged perpendicular to the axis of the sampling cylinder cavity. A sampling mechanism is disposed inside the sampling cylinder cavity. The bottom end of the sampling mechanism has a sampling position, which is slidably disposed coaxially within the sampling cylinder cavity along the axial direction of the sampling cylinder cavity. The positioning part can open when the sampling position moves to the bottom of the sampling cylinder cavity.

[0006] In one possible implementation, the positioning mechanism includes: The positioning cylinder has a cavity that is the sampling cylinder cavity; A split positioning cap is disposed at the bottom end of the positioning cylinder. The split positioning cap has multiple opening and closing flaps, each of which is hinged to the bottom end of the positioning cylinder. The hinge axis of each of the opening and closing flaps is perpendicular to the axis of the sampling cylinder cavity. The split positioning cap is the positioning part. A bearing cylinder is coaxially sleeved on the positioning cylinder. The bearing cylinder has a bearing cavity with an open top, and the bottom end of the bearing cylinder is fixed to the side wall of the positioning cylinder.

[0007] In one possible implementation, the positioning support mechanism includes: A guide cylinder is coaxially sleeved on the positioning cylinder and slidably connected to the positioning cylinder; A hinge seat is sleeved on the guide cylinder and fixedly connected to the guide cylinder. The central axis of the hinge seat is coaxial with the axis of the guide cylinder, and the bottom end of the hinge seat abuts against the top end of the bearing cylinder. The support cantilever is provided in multiple ways. One end of each support cantilever is hinged to the hinge seat. The hinge axis of each support cantilever is arranged perpendicular to the axis of the sampling cylinder cavity. Each support cantilever has multiple connecting teeth arranged in a ring at intervals along the hinge axis of the support cantilever. The support cantilever is the support part. A drive cylinder is slidably disposed on the hinge seat along the axial direction of the sampling cylinder cavity. The drive cylinder is provided with multiple drive racks, and each drive rack is correspondingly disposed with a connecting tooth on each support cantilever. The drive cylinder is used to drive each support cantilever to pitch and rotate synchronously.

[0008] In one possible implementation, each of the supporting cantilever arms includes: A telescopic cantilever arm has one end hinged to the hinge seat and the other end extending outward. The hinge end of the telescopic cantilever arm is provided with a connecting gear. The rotation axis of the connecting gear is collinear with the hinge circumference of the telescopic cantilever arm. Multiple connecting teeth together constitute the connecting gear. A hinge plate is hinged to the extended end of the telescopic cantilever, and the hinge axis of the hinge plate is arranged parallel to the hinge axis of the corresponding telescopic cantilever.

[0009] In one possible implementation, each of the telescopic cantilever arms includes: The outer rod has one end connected to the connecting gear and the other end extending outward; The inner rod is slidably disposed on the extended end of the outer rod along the extending direction of the outer rod; Positioning bolts are used to fix the positions of the outer rod and the inner rod.

[0010] In one possible implementation, each of the hinged discs is provided with a plurality of fixing pins, each of the fixing pins being used to fix it to the riverbank.

[0011] In one possible implementation, the drive cylinder includes: Multiple drive tooth plates are provided, and the multiple drive tooth plates are arranged circumferentially at intervals along the axis of the positioning cylinder. Each drive tooth plate is correspondingly arranged with each support cantilever. Each drive tooth plate is provided with a drive rack. Each drive tooth plate is slidably connected to the hinge seat along the axial direction of the positioning cylinder. Each drive tooth plate meshes with the connecting teeth of the corresponding support cantilever. A pressure ring is disposed at the top of each of the drive gear plates, and the pressure ring is detachably connected to each of the drive gear plates. A connecting ring is disposed at the bottom end of each of the drive gear plates, and the connecting ring is detachably connected to each of the drive gear plates. The lower pressure ring is bolted to each of the drive gear plates, and the connecting ring is bolted to each of the drive gear plates. The hinge seat is provided with a sliding groove for each of the drive tooth plates to slide. The hinge seat is provided with a long through hole through which the hinge ends of each telescopic cantilever arm pass.

[0012] In one possible implementation, the river wall sampling device further includes a protective housing, which is fastened to the hinge seat.

[0013] In one possible implementation, the sampling mechanism includes: An extension shaft is coaxially disposed within the sampling cylinder cavity; A sampling drill bit is located at the bottom end of the extension shaft and is poweredly connected to the extension shaft; A driver, located at the top of the extension shaft, is used to drive the extension shaft to rotate.

[0014] In one possible implementation, the river wall sampling device provided by the present invention includes the following steps: fixing and preparation, with staff carrying the river wall sampling device down to the sampling position on the river wall; Once the location is determined, the positioning part of the positioning mechanism is placed against the sampling point, and then each support part of the positioning support mechanism is unfolded, with each support part fitting against the side wall of the river channel wall. Once the position is determined by the positioning part, each of the supporting parts is fixed to the side wall of the river channel wall. Sampling preparation: Staff members carry the sampling device down to the sampling position on the river wall and insert the sampling device into the sampling cylinder cavity. Once sampling is complete, the sampling mechanism takes samples from inside the sampling cylinder towards the riverbank wall.

[0015] In this implementation, compared with existing technologies, the positioning part of the positioning mechanism can be opened and closed, and in the closed state, it can accurately reach the sampling position, providing a reference point for subsequent sampling. Multiple support parts of the positioning support mechanism can simultaneously pitch and adjust adaptively according to the arc-shaped structure of the riverbank, ensuring that each support part fits against the sidewall of the wall. This determines the normal direction between the sampling device and the wall surface, preventing the sampling drill bit or core tube from tilting. The sampling mechanism is coaxially slidable within the sampling tube cavity, ensuring that the sampling process proceeds along the correct axis, guaranteeing the verticality and integrity of the sample, reducing sample deformation and depth deviation, improving sampling accuracy, and offering good adaptability and practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the river wall sampling device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the sampling mechanism of the river wall sampling device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the exploded structure of the river wall sampling device provided in an embodiment of the present invention; Figure 4 A schematic diagram illustrating the steps of the river wall sampling method provided in this embodiment of the invention; Explanation of reference numerals in the attached figures: 10. Positioning mechanism; 11. Positioning cylinder; 12. Split-type positioning cap; 13. Bearing cylinder; 20. Positioning support mechanism; 21. Guide cylinder; 22. Hinge seat; 23. Support cantilever; 231. Telescopic cantilever; 2311. Outer rod; 2312. Inner rod; 2313. Positioning bolt; 232. Hinge plate; 2321. Fixing nail; 24. Drive cylinder; 241. Drive toothed plate; 242. Lower pressure ring; 243. Connecting ring; 30. Sampling mechanism; 31. Extension shaft; 32. Sampling drill bit; 33. Driver; 40. Protective housing. Detailed Implementation

[0017] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0018] It should be noted that the terms "length", "width", "height", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", and "tail" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0019] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of a structure. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0021] Please refer to the following: Figures 1 to 4 The present invention will now describe the river wall sampling device and method. The river wall sampling device and method includes a positioning mechanism 10, a positioning support mechanism 20, and a sampling mechanism 30. The positioning mechanism 10 has a hollow sampling cylinder cavity with an open top. The bottom of the sampling cylinder cavity has an openable and closable positioning part, which abuts against the sampling position on the river wall surface when closed. The positioning support mechanism 20 is detachably sleeved on the positioning mechanism 10. The positioning support mechanism 20 has multiple synchronously tilting support parts, with the hinge ends of each support part arranged annularly at intervals along the axis of the sampling cylinder cavity. The hinge axis of each support part is perpendicular to the axis of the sampling cylinder cavity. The sampling mechanism 30 is disposed inside the sampling cylinder cavity. The bottom end of the sampling mechanism 30 has a sampling position, which is coaxially and slidably disposed within the sampling cylinder cavity along the axial direction of the sampling cylinder cavity.

[0022] The positioning part can open when the sampling position moves to the bottom of the sampling cylinder cavity.

[0023] Compared with the prior art, the river wall sampling device and method provided in this embodiment have the advantage that the positioning part of the positioning mechanism 10 can be opened and closed, and can accurately reach the sampling position when closed, providing a reference point for subsequent sampling. Multiple support parts of the positioning support mechanism 20 can be simultaneously tilted, and can adaptively adjust according to the arc-shaped structure of the river wall, so that each support part fits against the side wall of the wall, thereby determining the normal direction of the sampling device and the wall surface, and avoiding tilting of the sampling drill bit 32 or the core tube. The sampling mechanism 30 is coaxially slidably arranged in the sampling tube cavity, ensuring that the sampling process is carried out along the correct axis, guaranteeing the verticality and integrity of the sample, reducing sample deformation and depth deviation, improving sampling accuracy, and exhibiting good adaptability and practicality.

[0024] In some embodiments, the positioning mechanism 10 may employ, for example... Figure 1 , Figure 3 The structure shown. See also Figure 1 , Figure 3 The positioning mechanism 10 includes a positioning cylinder 11, a split positioning cap 12, and a support cylinder 13. The cavity of the positioning cylinder 11 is a sampling cavity. The split positioning cap 12 is located at the bottom of the positioning cylinder 11 and has multiple opening and closing flaps. Each opening and closing flap is hinged to the bottom of the positioning cylinder 11, and the hinge axis of each opening and closing flap is perpendicular to the axis of the sampling cavity. The split positioning cap 12 is the positioning part. The support cylinder 13 is coaxially sleeved on the positioning cylinder 11. The support cylinder 13 has a support cavity with an open top, and the bottom end of the support cylinder 13 is fixed to the side wall of the positioning cylinder 11.

[0025] The positioning cylinder 11, serving as the carrier of the sampling cavity, provides a stable sampling space. Multiple opening and closing flaps of the split positioning cap 12 are hinged to the bottom of the positioning cylinder 11, allowing the positioning part to open and close flexibly. Before sampling, the closed opening and closing flaps abut against the sampling position, providing initial positioning. When the sampling position moves to the bottom of the sampling cavity, the opening and closing flaps open, without obstructing the sampling process. The bearing cylinder 13 is coaxially sleeved on the positioning cylinder 11, not only enhancing the structural strength of the positioning mechanism 10 but also providing a support point for the installation of the positioning support mechanism 20.

[0026] In actual operation, the staff will place the split positioning cap 12 of the positioning cylinder 11 against the sampling point. At this time, the closed opening and closing flap can accurately mark the sampling position. The cooperation between the bearing cylinder 13 and the positioning cylinder 11 allows the positioning support mechanism 20 to be stably installed on the positioning mechanism 10, providing a foundation for the subsequent deployment and positioning of the support part, and ensuring the structural stability of the entire sampling device.

[0027] In some embodiments, the positioning support mechanism 20 may employ, for example, Figure 1 , Figure 3 The structure shown. See also Figure 1 , Figure 3 The positioning support mechanism 20 includes a guide cylinder 21, a hinge seat 22, a support cantilever 23, and a drive cylinder 24. The guide cylinder 21 is coaxially sleeved on the positioning cylinder 11 and slidably connected to it. The hinge seat 22 is sleeved on the guide cylinder 21 and fixedly connected to it. The central axis of the hinge seat 22 is coaxial with the axis of the guide cylinder 21, and the bottom end of the hinge seat 22 abuts against the top end of the bearing cylinder 13. Multiple support cantilever arms 23 are provided, one end of each support cantilever arm 23 is hinged to the hinge seat 22, and the hinge axis of each support cantilever arm 23 is perpendicular to the axis of the sampling cylinder cavity. Multiple connecting teeth are provided at annular intervals along the hinge axis of each support cantilever arm 23, which serves as the support part. The drive cylinder 24 is slidably mounted on the hinge seat 22 along the axial direction of the sampling cylinder cavity. Multiple drive racks are provided on the drive cylinder 24, and each drive rack corresponds to a connecting tooth on each support cantilever arm 23. The drive cylinder 24 is used to drive each support cantilever 23 to pitch and rotate synchronously.

[0028] The guide cylinder 21 is slidably connected to the positioning cylinder 11 and can move along the axis of the positioning cylinder 11, facilitating the adjustment of the position of the positioning support mechanism 20. The hinge seat 22 is fixedly connected to the guide cylinder 21, providing a hinge base for the support cantilever 23. The hinge axis of the support cantilever 23 is perpendicular to the axis of the sampling cylinder cavity, and the hinge end is provided with connecting teeth. Through the meshing of the drive rack on the drive cylinder 24 and the connecting teeth, the synchronous pitch rotation of each support cantilever 23 is achieved.

[0029] In actual operation, when sampling is required on a curved wall, the staff pushes the drive cylinder 24 to slide along the axis of the positioning cylinder 11, and the drive rack drives the connecting teeth to rotate, so that each support cantilever 23 pitches synchronously until the support part is in contact with the wall surface, thereby accurately determining the sampling direction, improving the adaptability and operating efficiency of the sampling device, and ensuring that positioning can be completed quickly and accurately on various complex wall structures.

[0030] In some embodiments, the aforementioned support cantilever 23 may be adopted as follows: Figure 1 , Figure 3 The structure shown. See also Figure 1 , Figure 3 Each supporting cantilever 23 includes a telescopic cantilever 231 and a hinge plate 232. One end of the telescopic cantilever 231 is hinged to the hinge seat 22, and the other end extends outward. A connecting gear is provided on the hinge end of the telescopic cantilever 231. The rotation axis of the connecting gear is collinear with the hinge circumferential direction of the telescopic cantilever 231, and multiple connecting teeth together constitute the connecting gear. The hinge plate 232 is hinged to the extended end of the telescopic cantilever 231, and the hinge axis of the hinge plate 232 is parallel to the hinge axis of the corresponding telescopic cantilever 231.

[0031] The telescopic cantilever 231 allows for adjustment of the length of the supporting cantilever 23, adapting to wall surfaces at different distances and expanding the applicability of the device. The connecting gear consists of multiple connecting teeth that mesh with the drive rack of the drive cylinder 24, ensuring the synchronicity and accuracy of the rotation of the supporting cantilever 23. The hinge plate 232 is hinged to the extended end of the telescopic cantilever 231, with its hinge axis parallel to the hinge axis of the telescopic cantilever 231. This allows the hinge plate 232 to be fine-tuned when in contact with the wall surface, improving the fit between the support and the wall surface.

[0032] In actual operation, when facing an uneven wall surface, the telescopic cantilever 231 can adjust its length to bring the hinge plate 232 closer to the wall. The hinge design of the hinge plate 232 can be finely adjusted according to the undulation of the wall surface to ensure that the hinge plate 232 fits tightly against the wall, thereby making the entire sampling device stably fixed on the wall, providing reliable support for the sampling process and avoiding sampling deviations caused by unstable support.

[0033] In some embodiments, the telescopic cantilever 231 may be adopted as follows: Figure 1 , Figure 3 The structure shown. See also Figure 1 , Figure 3 Each telescopic cantilever 231 includes an outer rod 2311, an inner rod 2312, and a positioning bolt 2313. One end of the outer rod 2311 is connected to the connecting gear, and the other end extends outward. The inner rod 2312 is slidably mounted on the extended end of the outer rod 2311 along its extension direction. The positioning bolt 2313 is used to fix the positions of the outer rod 2311 and the inner rod 2312.

[0034] The sliding connection between the outer rod 2311 and the inner rod 2312 allows for length adjustment of the telescopic cantilever 231. The positioning bolt 2313 is used to fix the positions of the outer rod 2311 and the inner rod 2312, ensuring the stability of the telescopic cantilever 231's length during sampling. The supporting cantilever 23 can flexibly adjust its length according to the actual wall surface conditions, improving the device's adaptability to different wall structures.

[0035] In some embodiments, the hinge plate 232 described above may be as follows: Figure 1 , Figure 3 The structure shown. See also Figure 1 , Figure 3 Each hinge plate 232 is provided with multiple fixing nails 2321, and each fixing nail 2321 is used to fix it to the river wall.

[0036] The installation of fixing nail 2321 enhances the connection strength between the sampling device and the wall, making the device more stable during the sampling process and preventing the device from shifting due to sampling vibration and other factors, thereby ensuring the accuracy and reliability of the sampling.

[0037] In actual operation, the sampling drill bit 32 will generate some vibration during the sampling process. If the support part is only attached to the wall surface, it may loosen due to vibration, causing the sampling direction to deviate. However, after the fixing nail 2321 is inserted into the wall, it firmly fixes the support part to the wall, effectively resisting the impact of vibration and ensuring that the sampling device always maintains a stable position and orientation, making the collected samples more accurate.

[0038] In some embodiments, the drive cylinder 24 may be as follows: Figure 1 , Figure 3 The structure shown. See also Figure 1 , Figure 3 The drive cylinder 24 includes a drive toothed plate 241, a pressing ring 242, and a connecting ring 243. Multiple drive toothed plates 241 are arranged annularly at intervals along the axis of the positioning cylinder 11. Each drive toothed plate 241 corresponds to a supporting cantilever 23. Each drive toothed plate 241 has a drive rack. Each drive toothed plate 241 is slidably connected to the hinge seat 22 along the axial direction of the positioning cylinder 11. Each drive toothed plate 241 meshes with the connecting teeth of its corresponding supporting cantilever 23. The pressing ring 242 is located at the top of each drive toothed plate 241 and is detachably connected to each drive toothed plate 241. The connecting ring 243 is located at the bottom of each drive toothed plate 241 and is detachably connected to each drive toothed plate 241.

[0039] The lower pressure ring 242 is bolted to each drive gear plate 241, and the connecting ring 243 is bolted to each drive gear plate 241.

[0040] The hinge seat 22 is provided with a sliding groove for each drive tooth plate 241 to slide.

[0041] The hinge seat 22 is provided with a long through hole through which the hinge ends of each telescopic cantilever 231 pass.

[0042] Multiple drive gear plates 241 are arranged annularly at intervals along the axis of the positioning cylinder 11, corresponding to each supporting cantilever 23. Synchronous driving of each supporting cantilever 23 is achieved through the meshing of the drive rack and connecting teeth. The detachable connection method between the pressure ring 242 and the connecting ring 243 and the drive gear plates 241 facilitates the installation and disassembly of the drive cylinder 24, while also enhancing the structural stability of the drive cylinder 24. The sliding groove and elongated through hole on the hinge seat 22 provide sliding and rotational space for the hinge ends of the drive gear plates 241 and the telescopic cantilever 231, ensuring smooth driving.

[0043] In actual operation, when installing the drive cylinder 24, multiple drive tooth plates 241 are fixed together by the pressure ring 242 and the connecting ring 243. Then, the drive tooth plates 241 are inserted into the sliding groove of the hinge seat 22 so that the drive rack meshes with the connecting teeth of the support cantilever 23.

[0044] In some embodiments, the above-mentioned river wall sampling device can be adopted as follows: Figure 1 , Figure 3 The structure shown. See also Figure 1 , Figure 3 The river wall sampling device also includes a protective housing 40, which is fastened to the hinge seat 22.

[0045] The protective housing 40 is fastened to the hinge seat 22, which can protect the internal structure of the positioning support mechanism 20 (such as the drive cylinder 24, the hinge end of the support cantilever 23, etc.), prevent damage to the internal parts caused by wall debris during the sampling process, and extend the service life of the device.

[0046] In some embodiments, the sampling mechanism 30 described above may employ, for example... Figure 2 The structure shown. See also Figure 2 The sampling mechanism 30 includes an extension shaft 31, a sampling drill bit 32, and a driver 33. The extension shaft 31 is coaxially disposed within the sampling cylinder cavity. The sampling drill bit 32 is disposed at the bottom end of the extension shaft 31 and is poweredly connected to the extension shaft 31. The driver 33 is disposed at the top end of the extension shaft 31 and is used to drive the extension shaft 31 to rotate.

[0047] The extension shaft 31 is coaxially mounted inside the sampling cylinder cavity to ensure that the rotation axis of the sampling drill bit 32 is aligned with the axis of the sampling cylinder cavity, thus guaranteeing the accuracy of the sampling direction. The sampling drill bit 32 is poweredly connected to the extension shaft 31, and the driver 33 is located at the top of the extension shaft 31 to provide power for the sampling process.

[0048] In actual operation, during sampling, the driver 33 drives the extension shaft 31 to rotate, which in turn drives the sampling drill bit 32 to rotate. At the same time, the sampling mechanism 30 slides downward along the axis of the sampling cylinder. Since the extension shaft 31 is coaxial with the sampling cylinder, the sampling drill bit 32 always drills into the wall along the correct axis, avoiding sample deformation and depth deviation caused by axis offset, and ensuring that the collected samples are accurate.

[0049] Based on the river wall sampling method of the above-mentioned river wall sampling device, please refer to... Figures 1 to 4The steps include preparation, location determination, location fixing, sampling preparation, and sampling completion. Preparation involves personnel lowering the riverbank sampling device to the sampling location on the riverbank wall. Location determination involves placing the positioning part of the positioning mechanism 10 against the sampling point, and then unfolding the support parts of the positioning support mechanism 20, ensuring each support part is attached to the side wall of the riverbank wall. Location fixing involves fixing each support part to the side wall of the riverbank wall after the location is determined by the positioning part. Sampling preparation involves personnel lowering the sampling mechanism 30 to the sampling location on the riverbank wall and inserting the sampling mechanism 30 into the sampling cylinder cavity. Sampling completion involves using the sampling mechanism 30 to take a sample from the sampling cylinder cavity towards the riverbank wall.

[0050] During the preparation phase, staff carry the device to the sampling location to prepare for subsequent operations. In the location determination phase, the positioning part abuts against the wall and the support part unfolds to fit snugly against the wall, determining the position and orientation of the sampling device. In the location fixing phase, the support part is secured to the wall to ensure the stability of the device. In the sampling preparation phase, the sampling mechanism 30 is inserted into the sampling cylinder cavity to prepare for sampling. In the sampling completion phase, samples are taken using the sampling mechanism 30.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A riverbed wall sampling device, characterized in that, include: The positioning mechanism has a sampling cylinder cavity with an open top and a hollow interior. The bottom of the sampling cylinder cavity has an openable and closable positioning part. When the positioning part is closed, it abuts against the sampling wall on the river wall. A positioning support mechanism is detachably sleeved on the positioning mechanism. The positioning support mechanism has multiple support parts that can be synchronously pitched. The hinge ends of each support part are arranged in a ring at intervals along the axis of the sampling cylinder cavity, and the hinge axis of each support part is arranged perpendicular to the axis of the sampling cylinder cavity. A sampling mechanism is disposed inside the sampling cylinder cavity. The bottom end of the sampling mechanism has a sampling position, which is slidably disposed coaxially within the sampling cylinder cavity along the axial direction of the sampling cylinder cavity. The positioning part can open when the sampling position moves to the bottom of the sampling cylinder cavity.

2. The riverbank wall sampling device as described in claim 1, characterized in that, The positioning mechanism includes: The positioning cylinder has a cavity that is the sampling cylinder cavity; A split positioning cap is disposed at the bottom end of the positioning cylinder. The split positioning cap has multiple opening and closing flaps, each of which is hinged to the bottom end of the positioning cylinder. The hinge axis of each of the opening and closing flaps is perpendicular to the axis of the sampling cylinder cavity. The split positioning cap is the positioning part. A bearing cylinder is coaxially sleeved on the positioning cylinder. The bearing cylinder has a bearing cavity with an open top, and the bottom end of the bearing cylinder is fixed to the side wall of the positioning cylinder.

3. The riverbank wall sampling device as described in claim 2, characterized in that, The positioning support mechanism includes: A guide cylinder is coaxially sleeved on the positioning cylinder and slidably connected to the positioning cylinder; A hinge seat is sleeved on the guide cylinder and fixedly connected to the guide cylinder. The central axis of the hinge seat is coaxial with the axis of the guide cylinder, and the bottom end of the hinge seat abuts against the top end of the bearing cylinder. The support cantilever is provided in multiple ways. One end of each support cantilever is hinged to the hinge seat. The hinge axis of each support cantilever is arranged perpendicular to the axis of the sampling cylinder cavity. Each support cantilever has multiple connecting teeth arranged in a ring at intervals along the hinge axis of the support cantilever. The support cantilever is the support part. A drive cylinder is slidably disposed on the hinge seat along the axial direction of the sampling cylinder cavity. The drive cylinder is provided with multiple drive racks, and each drive rack is correspondingly disposed with a connecting tooth on each support cantilever. The drive cylinder is used to drive each support cantilever to pitch and rotate synchronously.

4. The riverbank wall sampling device as described in claim 3, characterized in that, Each of the aforementioned support cantilever arms includes: A telescopic cantilever arm has one end hinged to the hinge seat and the other end extending outward. The hinge end of the telescopic cantilever arm is provided with a connecting gear. The rotation axis of the connecting gear is collinear with the hinge circumference of the telescopic cantilever arm. Multiple connecting teeth together constitute the connecting gear. A hinge plate is hinged to the extended end of the telescopic cantilever, and the hinge axis of the hinge plate is arranged parallel to the hinge axis of the corresponding telescopic cantilever.

5. The riverbank wall sampling device as described in claim 4, characterized in that, Each of the aforementioned telescopic cantilever arms includes: The outer rod has one end connected to the connecting gear and the other end extending outward; The inner rod is slidably disposed on the extended end of the outer rod along the extending direction of the outer rod; Positioning bolts are used to fix the positions of the outer rod and the inner rod.

6. The riverbank wall sampling device as described in claim 4, characterized in that, Each of the hinged plates is provided with a plurality of fixing nails, and each of the fixing nails is used to fix it to the river wall.

7. The riverbank wall sampling device as described in claim 4, characterized in that, The drive cylinder includes: Multiple drive tooth plates are provided, and the multiple drive tooth plates are arranged circumferentially at intervals along the axis of the positioning cylinder. Each drive tooth plate is correspondingly arranged with each support cantilever. Each drive tooth plate is provided with a drive rack. Each drive tooth plate is slidably connected to the hinge seat along the axial direction of the positioning cylinder. Each drive tooth plate meshes with the connecting teeth of the corresponding support cantilever. A pressure ring is disposed at the top of each of the drive gear plates, and the pressure ring is detachably connected to each of the drive gear plates. A connecting ring is disposed at the bottom end of each of the drive gear plates, and the connecting ring is detachably connected to each of the drive gear plates. The lower pressure ring is bolted to each of the drive gear plates, and the connecting ring is bolted to each of the drive gear plates. The hinge seat is provided with a sliding groove for each of the drive tooth plates to slide. The hinge seat is provided with a long through hole through which the hinge ends of each telescopic cantilever arm pass.

8. The riverbank wall sampling device as described in claim 3, characterized in that, The river wall sampling device also includes a protective housing, which is fastened to the hinge seat.

9. The riverbank wall sampling device as described in claim 1, characterized in that, The sampling mechanism includes: An extension shaft is coaxially disposed within the sampling cylinder cavity; A sampling drill bit is located at the bottom end of the extension shaft and is poweredly connected to the extension shaft; A driver, located at the top of the extension shaft, is used to drive the extension shaft to rotate.

10. A method for sampling riverbank walls, comprising the riverbank wall sampling device as described in any one of claims 1-9, the steps of which include: After securing the equipment, staff members lowered the riverbank sampling device to the sampling location on the riverbank. Once the location is determined, the positioning part of the positioning mechanism is placed against the sampling point, and then each support part of the positioning support mechanism is unfolded, with each support part fitting against the side wall of the river channel wall. Once the position is determined by the positioning part, each of the supporting parts is fixed to the side wall of the river channel wall. Sampling preparation: Staff members carry the sampling device down to the sampling position on the river wall and insert the sampling device into the sampling cylinder cavity. Once sampling is complete, the sampling mechanism takes samples from inside the sampling cylinder towards the riverbank wall.

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