Octagonal climbing device for large diameter pile foundations

Abstract

The application discloses an octagonal climbing device for a large-diameter pile foundation, which comprises a ring-shaped frame and a clamping driving mechanism arranged inside the ring-shaped frame. The ring-shaped frame comprises a first frame body and a second frame body, one end of the first frame body and the second frame body is rotationally connected through a pin shaft, and the other end is fixed through a connecting piece. The clamping driving mechanism is arranged along the circumference of the ring-shaped frame. In the application, through the unique octagonal opening and closing ring-shaped frame, the linear module driving type clamping mechanism uniformly distributed along the circumference, the buffer plate and the auxiliary supporting piece with the air pressure linkage balance function, and the quick and reliable T-shaped clamping rod connecting piece and the auxiliary limiting locking mechanism, not only the convenient installation and dismounting on the in-service large-diameter pile foundation are realized, but also the self-adaptive stable clamping of the pile foundation with different diameters and different surface conditions is realized. The pneumatic linkage design ingeniously converts the mechanical displacement into auxiliary power, and greatly improves the reliability and environmental adaptability of the system.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment for pile foundation construction and testing, and in particular to an octagonal climbing device for large-diameter pile foundations. Background Technology

[0002] With the rapid development of infrastructure construction in my country, large-diameter pile foundations (usually referring to those with a diameter of 1.5 meters or more, and even 3-5 meters) have been widely used as the main foundation load-bearing structures in bridges, ports, offshore wind power, and super high-rise buildings. These pile foundations are in harsh natural environments or complex hydrogeological conditions for a long time, so their structural safety and durability are crucial. Therefore, regular maintenance work such as visual inspection, crack repair, anti-corrosion coating, and marine organism removal is a necessary requirement to ensure their safe operation throughout their entire life cycle.

[0003] However, inspecting and maintaining the outer wall of large-diameter pile foundations is an extremely challenging high-altitude operation. Traditional methods mainly rely on manual labor: erecting scaffolding or using aerial work platforms. Scaffolding has a long erection period, high cost, and stringent site requirements, and is difficult to implement for high pile caps or underwater pile foundations; aerial work platforms are limited by the height of the pile foundation and the terrain, and pose significant safety risks. In recent years, with the development of robotics technology, robots capable of climbing vertical or inclined surfaces have emerged. Existing climbing devices are mainly divided into the following categories: magnetic adsorption climbing devices: suitable for steel pipe piles made of ferromagnetic materials, providing adsorption force through permanent magnets or electromagnets. However, their disadvantages are obvious: ineffective for concrete pile foundations made of non-ferromagnetic materials; the adsorption force is greatly affected by surface corrosion and paint; difficult to turn during movement, and high energy consumption; negative pressure adsorption climbing devices: adsorbed onto the surface of the pile foundation through vacuum suction cups. Their disadvantage is that they require extremely high surface flatness; the surface of large-diameter concrete pile foundations usually has defects such as unevenness and pores, which can easily lead to air leakage and failure, making it difficult to guarantee safety.

[0004] Frame-clamping climbing devices: These devices typically enclose the pile foundation within a circular or square frame, using drive wheels or tracks to clamp onto the outer wall of the pile foundation for climbing. However, existing frame structures are mostly integral or hinged circular structures, presenting the following technical challenges: Poor adaptability: The diameter of the circular frame must precisely match the diameter of the pile foundation; different sizes of frames are required for pile foundations of different diameters, resulting in poor versatility. Unstable clamping force: When faced with slight changes in the diameter of the pile foundation or local protrusions / depressions on the surface, the clamping mechanism cannot adaptively adjust in real time, easily leading to slippage or jamming. Difficult installation and disassembly: Integral frames need to be inserted from the top of the pile foundation, making installation almost impossible for completed tall pile foundations; even with a split structure, existing connection methods are either insufficiently strong or cumbersome to operate.

[0005] In view of the shortcomings of the existing technology, there is an urgent need to provide a climbing device for large-diameter pile foundations that has a reasonable structural design, is easy to install, is highly adaptable to pile foundations of different diameters, has a stable and reliable clamping force, and has high climbing efficiency. Summary of the Invention

[0006] The purpose of this invention is to solve the technical problems of poor adaptability, unstable clamping, and difficult installation of existing large-diameter pile foundation climbing devices, and to propose an octagonal climbing device for large-diameter pile foundations that is novel in structure, integrated in function, safe and efficient.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An octagonal climbing device for large-diameter pile foundations includes a ring frame and a clamping drive mechanism disposed inside the ring frame. The ring frame includes a first frame and a second frame, one end of which is rotatably connected by a pin, and the other end is fixed by a connector. The clamping drive mechanism is spaced circumferentially along the ring frame and serves to contact the outer wall of the pile foundation and provide support.

[0008] In one embodiment, the annular frame is a hollow rectangular frame structure, with an installation space formed on its inner side for mounting the clamping drive mechanism. Designing all eight sides of the annular frame as hollow rectangular frames significantly reduces the overall weight of the device, facilitating transportation and manual installation. Furthermore, the hollow structure can accommodate cables, air pipes, or auxiliary components, resulting in a neat appearance and avoiding interference risks caused by external wiring.

[0009] In one embodiment, the clamping drive mechanism includes a mounting bracket, a mounting plate, and a clamping member disposed on one side of the mounting plate. The other side of the mounting plate is fixedly connected to the telescopic end of the linear module, and the linear module is fixedly mounted on the mounting bracket. This design achieves the separation and integration of clamping and driving functions. The mounting bracket serves as the base of the entire mechanism and is firmly connected to the annular frame. The linear module (which can be an electric lead screw module or a pneumatic slide) is the core drive unit, and its telescopic end performs precise radial linear motion. When the linear module extends, it pushes the mounting plate and clamping member to move towards the center of the pile foundation, thereby clamping the clamping member onto the outer wall of the pile foundation; when the linear module retracts, it releases.

[0010] In one embodiment, the clamping member includes a connecting plate fixedly mounted to the side wall of the mounting plate, with buffer plates symmetrically hinged at both ends of the connecting plate. This is key to achieving adaptive contact and increasing the friction area. The buffer plates are hinged to the connecting plate, allowing them to swing freely within a certain angle range around the hinge axis. When the device is clamped onto the pile foundation, clamping drive mechanisms at different positions and angles drive their respective buffer plates to press against the pile foundation surface. Since the pile foundation is cylindrical, ideally, the buffer plates should be tangent to the arc. The hinged structure allows the buffer plates to automatically deflect, ensuring their entire working surface is tightly fitted against the arc surface of the pile foundation, rather than just line or point contact.

[0011] In one embodiment, the mounting plate is further provided with a limiting member that cooperates with the buffer plate. The limiting member includes a sleeve fixed on the mounting plate, and a movable rod is slidably sleeved inside the sleeve. The movable rod movably abuts against the end of the buffer plate away from the pile foundation.

[0012] In one embodiment, the annular frame is further provided with an auxiliary support member that cooperates with the clamping member. The auxiliary support member includes a fixed block fixedly disposed within the hollow rectangular frame structure. A sealing cavity is provided in the fixed block. A movable block is dynamically sealed and installed in the sealing cavity. The buffer plate, the sleeve and the sealing cavity are connected by an air passage.

[0013] In one embodiment, the movable rod is in dynamic sealing with the inner wall of the sleeve, and the sleeve is connected to the inside of the sealing cavity through an air guide pipe.

[0014] In one embodiment, an auxiliary plate is also installed on the surface of the buffer plate away from the movable rod. The auxiliary plate is an internally hollow elastic airbag, and the interior of the auxiliary plate is also connected to the interior of the sealing cavity through an air guide tube.

[0015] In one embodiment, the connector includes a connecting lug plate fixedly disposed at one end of the first frame or the second frame away from the pin shaft, and a corresponding locking rod is provided at the end of the other set of frames. The surface of the connecting lug plate is provided with a locking groove that is compatible with the locking rod.

[0016] In one embodiment, the clamping rod has a T-shaped cross-section, and the clamping groove has a transverse clamping tongue, one end of which passes through and connects to the ear plate and extends to the outside.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: In this invention, through its unique octagonal opening and closing ring frame, circumferentially distributed linear module driven clamping mechanism, buffer plate and auxiliary support with pneumatic linkage balance function, as well as fast and reliable T-shaped clamping rod connector and auxiliary limit locking mechanism, not only is convenient installation and disassembly on in-service large-diameter pile foundations achieved, but also adaptive and stable clamping of pile foundations with different diameters and surface conditions is realized. Its pneumatic linkage design ingeniously converts mechanical displacement into auxiliary power, eliminating the need for additional sensors and complex control algorithms, and greatly improving the reliability and environmental adaptability of the system. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall assembly structure of the octagonal climbing device provided according to the present invention is shown. Figure 2 The invention provides Figure 1 Top view of the structure; Figure 3 A schematic diagram of the unfolded structure of the octagonal climbing device provided according to the present invention is shown. Figure 4 The invention provides Figure 2 Schematic diagrams of the structure from different perspectives; Figure 5 An enlarged schematic diagram of the clamping drive mechanism provided according to the present invention is shown.

[0019] Legend: 1. First frame; 2. Second frame; 3. Mounting bracket; 4. Mounting plate; 5. Linear module; 6. Connecting plate; 7. Buffer plate; 8. Sleeve; 9. Movable rod; 10. Fixing block; 11. Movable block; 12. Auxiliary plate; 13. Connecting ear plate; 14. Locking rod; 15. Locking groove; 16. Pin; 17. Locking tongue. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the 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 and not intended to limit the invention.

[0021] It should be noted that the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to direct setup or connection, or indirect setup or connection through centered components or centered structures.

[0022] Furthermore, in embodiments of this invention, terms such as "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, or in a conventional placement or usage state. These terms are merely for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the structures, features, devices, or elements referred to must have a specific orientation or positional relationship, nor that they must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0023] The various specific technical features and embodiments described in the detailed embodiments can be combined in any suitable manner without contradiction. For example, different implementation methods can be formed by combining different specific technical features / embodiments. In order to avoid unnecessary repetition, the various possible combinations of the various specific technical features / embodiments in this invention will not be described separately.

[0024] Example 1: Please see Figures 1 to 5 The present invention provides a technical solution: an octagonal climbing device for large-diameter pile foundations, the overall structure of which is as follows: like Figure 1 As shown, an octagonal climbing device for large-diameter pile foundations has a core component comprising an integral octagonal ring frame and multiple clamping drive mechanisms evenly distributed circumferentially on the inner side of the ring frame. The ring frame is used to wrap around the periphery of the pile foundation, providing structural support and installation foundation for the entire device; the clamping drive mechanisms are used to directly contact the outer wall of the pile foundation and provide clamping force. The ring frame consists of two independent half-frame structures: a first frame 1 and a second frame 2. Both the first frame 1 and the second frame 2 are constructed in a roughly "U" shape or a semi-octagonal shape. Together, they form a complete regular octagonal closed loop. To achieve a reliable connection and convenient opening and closing between the two, one end of the first frame 1 and the second frame 2 is rotatably connected by a high-strength pin 16, so that the two frames can be opened or closed by rotating around the axis of the pin 16 like a hinged door. The pin 16 should be installed near one vertex of the octagon to ensure that the opening is large enough to allow large-diameter piles to be inserted laterally from the side. The other end of the first frame 1 and the second frame 2 is limited and fixed by a quick-locking connector. When the two frames are closed, they are firmly locked into an integral ring structure by the connector. like Figure 2As shown in the figure, each side of the above-mentioned ring frame is made of hollow rectangular cross-section profiles or welded structures, that is, it is a hollow rectangular frame structure. This structure enables the ring frame to have high bending and torsional stiffness while effectively controlling its own weight. The hollow internal space of each side forms a regular installation space. This installation space is not only used to accommodate and fix the clamping drive mechanism, but also to lay control cables, pneumatic pipelines, etc., realizing the neat separation of the inside and outside of the device. Distribution and composition of clamping drive mechanism Please continue reading. Figure 1 and Figure 2 Multiple clamping drive mechanisms are evenly spaced along the circumference of the ring frame. Specifically, in this embodiment, each clamping drive mechanism is installed in the hollow rectangular frame structure formed by the edge. Each clamping drive mechanism mainly includes a mounting bracket 3, a linear module 5, a mounting plate 4, and a clamping component.

[0025] Mounting bracket 3: Securely fixed to the inner wall of the hollow mounting space of the annular frame by screws or welding. Mounting bracket 3 provides a precise positioning reference and a robust load-bearing foundation for the entire clamping drive mechanism.

[0026] Linear Module 5: A high-precision electric ball screw linear module is adopted. The housing of the linear module 5 is fixedly installed on the mounting bracket 3. The linear module 5 has a telescopic end that can make precise linear reciprocating motion in the radial direction.

[0027] Mounting plate 4 is a metal connecting plate with a certain thickness. One side of it is fixedly connected to the telescopic end of the linear module 5 by bolts. The telescopic movement of the linear module 5 directly drives the mounting plate 4 to move radially.

[0028] Clamping component: Located on the other side of the mounting plate 4, i.e. the side facing the pile foundation, the clamping component is used to press against or detach from the outer wall of the pile foundation under the push of the mounting plate 4.

[0029] Example 2: like Figure 2 and Figure 3 As shown, the clamping component mainly includes a connecting plate 6 and two buffer plates 7. The connecting plate 6 is fixedly installed on the front center of the mounting plate 4 by bolts. The two buffer plates 7 are symmetrically arranged at both ends of the connecting plate 6. The inner end of each buffer plate 7 is hinged to the end of the connecting plate 6 through a high-strength hinge shaft. Therefore, each buffer plate 7 can independently swing freely around its hinge shaft within a certain angle range. The outer surface of the buffer plate 7 is the working surface, and its shape is a slightly convex arc surface to better adapt to the cylindrical shape of the pile foundation. In this embodiment, the buffer plate 7 is made of high-strength wear-resistant nylon material, which has self-lubricating properties and will not damage the concrete or anti-corrosion coating of the pile foundation. On the mounting plate 4, a limiting component that cooperates with the buffer plate 7 is also provided. The limiting component mainly includes a sleeve 8 and a movable rod 9. The sleeve 8 is a cylindrical structure with one end closed and the other end open. Its closed end is fixedly installed on the front of the mounting plate 4. The movable rod 9 is slidably sleeved in the sleeve 8. Its outer end passes through the opening of the sleeve 8 and extends outward. The extended end of the movable rod 9 is in movable contact with the inner surface of the corresponding buffer plate 7 that is away from the pile foundation. The end of the movable rod 9 is never fixedly connected to the back of the buffer plate 7. The two can slide relative to each other. In the initial unclamped state, the movable rod 9 is in the maximum extended position under the action of the internal spring or air pressure. At this time, the included angle between the buffer plate 7 and the mounting plate 4 is the largest. When the buffer plate 7 is pressed against the pile foundation surface and deflects, its back will push the movable rod 9 to overcome the resistance and slide into the sleeve 8.

[0030] Example 3: like Figure 2 and Figure 3 As shown, an auxiliary support component that works in conjunction with the clamping component is also provided on the annular frame. The main body of the auxiliary support component is located inside the hollow rectangular frame structure of the annular frame, specifically including a fixed block 10 and a movable block 11. The fixed block 10 is a metal block with a sealed cavity machined inside, which is fixedly installed on the inner wall of the hollow frame. The movable block 11 is a piston-type structure that is precisely matched with the inner diameter of the sealed cavity. It is installed in the sealed cavity through a dynamic sealing ring, so that the movable block 11 can move in the sealed cavity without leaking gas. The outer end of the movable block 11 can be designed to extend out of the fixed block 10 and can be connected to an additional wear-resistant pad or roller for contact with the pile foundation surface or interaction with other structures on the annular frame.

[0031] The internal space of the sleeve 8, the sealed cavity within the fixed block 10, and the interior of the auxiliary plate 12 on the surface of the buffer plate 7 are interconnected via air guide pipes. Specifically, each sleeve 8 is equipped with an air nozzle connector, which is connected to the corresponding air nozzle connector on the fixed block 10 via a pressure-resistant flexible air guide pipe, thereby connecting the inner cavity of the sleeve 8 with the sealed cavity. Simultaneously, the sealed cavity is also equipped with another air nozzle connector, which is connected to the air nozzle on the auxiliary plate 12 via another air guide pipe. The entire system is a closed loop filled with an appropriate amount of inert gas (such as nitrogen).

[0032] Please refer to this carefully. Figure 3 and Figure 5Based on the above structure, an auxiliary plate 12 is also installed on the surface of the buffer plate 7 away from the movable rod 9 (i.e. the working surface that is in direct contact with the pile foundation). The auxiliary plate 12 is a hollow, inflatable elastic airbag made of high-strength rubber or polyurethane elastomer. The bottom surface of the auxiliary plate 12 is bonded and fixed to the buffer plate 7, and its front surface (facing the pile foundation) has a wear-resistant mesh structure. The internal cavity of the auxiliary plate 12 is connected to the sealed cavity in the fixing block 10 through a built-in air passage and air guide pipe interface.

[0033] Please see Figure 1 and Figure 4 The connector includes a connecting lug 13 disposed at the end of the second frame 2 away from the pin 16, and a corresponding locking rod 14 disposed at the end of the first frame 1. The connecting lug 13 is a metal plate with an open slot 15, the opening of which faces away from the center of the pile foundation to facilitate the entry of the locking rod 14. The locking rod 14 has a T-shaped cross-section, that is, it has a slender rod and a head that widens laterally at the end. The shape of the slot 15 is adapted to the head and rod of the T-shaped lever 14, so that the lever 14 can slide into the bottom of the slot 15 from the side. Inside the connecting ear plate 13, there is also a horizontal (i.e., perpendicular to the direction of entry of the lever 14) latch 17. The latch 17 is a sliding pin-shaped component. One end of it passes through the connecting ear plate 13 and extends to the outside, forming a handle or pressing part that is easy to operate manually or with tools. The other end can extend into the side wall of the slot 15 in the locked state, thereby locking behind the head of the T-shaped lever 14. Specifically, a spring for resetting can be fitted on the surface of the latch 17.

[0034] Example 4: To achieve the automatic climbing effect of the device, a climbing drive component is also included. The climbing drive component includes a motor and a friction wheel mounted on the mounting plate 4. The friction wheel is connected to the motor for transmission. When the linear module 5 extends to press the buffer plate 7 against the pile foundation, the friction wheel presses against the surface of the pile foundation at the same time. The motor drives the friction wheel to rotate, thereby driving the device to move along the axial direction of the pile foundation.

[0035] Working principle and dynamic process: At a suitable location at the bottom or middle of the pile foundation where the work needs to be done, the operator first moves the entire device to the side of the pile foundation. At this time, the connector is in the unlocked state. The operator manually rotates the first frame 1 and the second frame 2 around the pin 16 to open them, so that the ring frame presents a large open "V" or "C" shape. Then, the device is pushed laterally from the side of the pile foundation so that the pile foundation enters between the open first frame 1 and the second frame 2. Next, the operator rotates the first frame 1 and the second frame 2 in the opposite direction to close them. During this process, the T-shaped locking rod 14 at the end of the first frame 1 will gradually slide into the slot 15 of the connecting ear plate 13 at the end of the second frame 2. When the two frames are completely closed, the T-shaped locking rod 14 falls completely into the bottom of the slot 15. Thus, the connector completes double locking. The entire installation process does not require any tools and is quick and convenient. After the device is installed, the control system is activated, and all linear modules 5 start to move simultaneously. Their telescopic ends extend, pushing the mounting plate 4 and its clamping and limiting components to move towards the axis of the pile foundation. As the mounting plate 4 advances, the auxiliary plate 12 first contacts the outer surface of the pile foundation. Since the airbag is flexible, it will be slightly compressed, producing a certain deformation, thus quickly conforming to the tiny unevenness of the pile foundation surface. The compression of the auxiliary plate 12 increases the internal gas pressure, and some gas is forced into the sealed cavity of the fixed block 10 through the air guide pipe, pushing the movable block 11 to move outward a small distance, generating a primary auxiliary force. As the linear modules 5 continue to advance, after the auxiliary plate 12 is compressed to a certain extent, the buffer plate 7 begins to contact the surface of the pile foundation. Since the foundation surface is curved, while the buffer plate 7 is flat or flat with a slight curvature, the initial contact is point contact. Under continuous pressure, the buffer plate 7 will deflect around its hinge axis with the connecting plate 6 until its entire working surface is completely attached to the curved surface of the pile foundation through the auxiliary plate 12. At this time, the two buffer plates 7 at both ends of the connecting plate 6 will form a "V" shape or an outward V-shape, adaptively covering the cylindrical surface, greatly increasing the effective contact area. As the buffer plate 7 deflects and fits, its end away from the pile foundation moves inward (towards the mounting plate 4), thereby pushing the movable rod 9 that abuts against it. The movable rod 9 is forced to slide into the sleeve 8. Since there is a dynamic seal between the movable rod 9 and the sleeve 8, the sliding of the movable rod 9 will compress the gas in the sealed chamber inside the sleeve 8, increasing its pressure. This significantly compressed high-pressure gas is immediately transmitted to the sealed chamber of the fixed block 10 through the air guide pipe, generating a strong thrust on the movable block 11. This thrust is much greater than the primary force generated by the airbag compression, forming a secondary strong auxiliary support. The movable block 11 extends and abuts against the pile foundation, thus forming an auxiliary support structure that balances the clamping force. After the operation is completed, the operator manually pulls out the latch 17 on the connecting ear plate 13 to release the lock on the T-shaped latch 14. Then, the operator manually pries open the first frame 1 or the second frame 2, allowing the annular frame to rotate around the pin 16 to open. Finally, the device is moved laterally from the side of the pile foundation to complete the disassembly.

[0036] In summary, the octagonal climbing device for large-diameter pile foundations provided by this invention, through its unique octagonal opening and closing ring frame, circumferentially distributed linear module-driven clamping mechanism, buffer plate and auxiliary support components with pneumatic linkage balancing function, as well as fast and reliable T-shaped clamping rod connectors and auxiliary limit locking mechanism, not only achieves convenient installation and disassembly on in-service large-diameter pile foundations, but also achieves adaptive and stable clamping of pile foundations with different diameters and surface conditions. Its pneumatic linkage design cleverly converts mechanical displacement into auxiliary power, eliminating the need for additional sensors and complex control algorithms, greatly improving the system's reliability and environmental adaptability.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An octagonal climbing device for large-diameter pile foundations, characterized in that, It includes an annular frame and a clamping drive mechanism disposed inside the annular frame; the annular frame includes a first frame (1) and a second frame (2), one end of the first frame (1) and the second frame (2) are rotatably connected by a pin (16), and the other end is fixed by a connector; the clamping drive mechanism is arranged at intervals along the circumference of the annular frame, and is used to contact the outer wall of the pile foundation and provide support.

2. An octagonal climbing device for large-diameter pile foundations according to claim 1, characterized in that, The annular frame is a hollow rectangular frame structure, with an installation space formed on its inner side for installing the clamping drive mechanism.

3. An octagonal climbing device for large-diameter pile foundations according to claim 2, characterized in that, The clamping drive mechanism includes a mounting bracket (3), a mounting plate (4), and a clamping member disposed on one side of the mounting plate (4). The other side of the mounting plate (4) is fixedly connected to the telescopic end of the linear module (5). The linear module (5) is fixedly mounted on the mounting bracket (3).

4. An octagonal climbing device for large-diameter pile foundations according to claim 3, characterized in that, The clamping component includes a connecting plate (6) fixedly installed on the side wall of the mounting plate (4), and buffer plates (7) are symmetrically hinged at both ends of the connecting plate (6).

5. An octagonal climbing device for large-diameter pile foundations according to claim 4, characterized in that, The mounting plate (4) is also provided with a limiting member that cooperates with the buffer plate (7). The limiting member includes a sleeve (8) fixed on the mounting plate (4). A movable rod (9) is slidably sleeved inside the sleeve (8). The movable rod (9) is in movable contact with the end of the buffer plate (7) away from the pile foundation.

6. An octagonal climbing device for large-diameter pile foundations according to claim 4, characterized in that, The annular frame is also provided with an auxiliary support component that cooperates with the clamping component. The auxiliary support component includes a fixed block (10) fixedly installed in the hollow rectangular frame structure. A sealing cavity is opened in the fixed block (10). A movable block (11) is dynamically sealed in the sealing cavity. The buffer plate (7), the sleeve (8) and the sealing cavity are connected by an air passage.

7. An octagonal climbing device for large-diameter pile foundations according to claim 6, characterized in that, The movable rod (9) and the inner wall of the sleeve (8) are in a dynamic seal, and the sleeve (8) and the inside of the sealing cavity are connected by an air guide pipe.

8. An octagonal climbing device for large-diameter pile foundations according to claim 7, characterized in that, An auxiliary plate (12) is also installed on the surface of the buffer plate (7) away from the movable rod (9). The auxiliary plate (12) is an elastic airbag with a hollow interior, and the interior of the auxiliary plate (12) is also connected to the interior of the sealed cavity through an air guide tube.

9. An octagonal climbing device for large-diameter pile foundations according to any one of claims 1-8, characterized in that, The connector includes a connecting ear plate (13) fixedly disposed at one end of the first frame (1) or the second frame (2) away from the pin (16), and a corresponding locking rod (14) is provided at the other end of the frame. The surface of the connecting ear plate (13) is provided with a locking groove (15) that is compatible with the locking rod (14).

10. An octagonal climbing device for large-diameter pile foundations according to claim 9, characterized in that, The cross-section of the lever (14) is T-shaped, and the slot (15) is provided with a transverse latch (17). One end of the latch (17) passes through and connects to the ear plate (13) and extends to the outside.

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