Concrete bridge cylindrical climbing device

Abstract

The utility model relates to bridge construction technical field provides a kind of concrete bridge cylinder climbing device, including support unit, lifting assembly and work platform, support unit includes upper support assembly and lower support assembly, upper support assembly and lower support assembly are arranged on bridge cylinder upside down, upper support assembly and lower support assembly are connected by lifting assembly between, lifting assembly is also movably connected bridge cylinder, work platform is set on upper support assembly and lower support assembly;Upper support assembly and lower support assembly are used to alternate connection bridge cylinder to support device, lifting assembly is used to drive upper support assembly or lower support assembly not connected with bridge cylinder lifting movement.The utility model can not be restricted by terrain, mechanical equipment performance, construction personnel can easily and safely climb to the arbitrary height of high column and work, and with work platform, not restricted by terrain, not restricted by bridge height to climb bridge concrete cylinder.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to a concrete bridge column climbing device. Background Technology

[0002] In the maintenance and construction of concrete bridge columns in water or on land, lifting and hoisting machinery and equipment cannot be approached or the lifting height cannot meet the requirements, or the terrain restricts the erection of scaffolding.

[0003] Existing technologies for climbing tall concrete bridge columns include two main approaches: one is to erect scaffolding for land-based bridge columns, but the work involved in erecting and dismantling scaffolding is enormous, and some bridge piers also require foundation reinforcement. The higher the scaffolding is erected, the worse its stability against overturning, and climbing it is extremely dangerous for construction workers. The other approach is to use lifting equipment, but sometimes the lifting height of lifting equipment cannot meet the construction requirements. There are also no good methods for climbing bridge columns in water due to terrain limitations.

[0004] Therefore, in order to address the above problems, a concrete bridge column climbing device is proposed. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by developing a concrete bridge column climbing device. This device is not limited by terrain or the performance of mechanical equipment, allowing construction workers to easily and safely climb to any height of the column for work. It also features a built-in work platform, enabling the climbing of concrete columns for bridges without being restricted by terrain or bridge height.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] A concrete bridge column climbing device includes a support unit, a lifting assembly, and a working platform. The support unit includes an upper support assembly and a lower support assembly, which are positioned vertically on the bridge column. The upper and lower support assemblies are connected by the lifting assembly, which is also movably connected to the bridge column. A working platform is provided on both the upper and lower support assemblies. The upper and lower support assemblies are used to alternately connect the bridge column to support the device. The lifting assembly is used to drive the upper or lower support assembly that is not connected to the bridge column to move up and down.

[0008] Preferably, the upper support assembly includes an upper clamp, which includes symmetrically arranged semicircular rings. The connection positions of the semicircular rings are provided with stiffening brackets, and the corresponding stiffening brackets are connected by connecting bolts. The bottom of the upper clamp is slidably connected to a circular steel plate. The sliding direction of the upper clamp is parallel to the axial direction when the connecting bolts are connected to the stiffening brackets, which allows the left and right semicircular rings of the upper clamp to slide closer or further apart on the circular steel plate. The bottom of the circular steel plate is provided with an upper frame, and the upper side of the upper frame is provided with a working platform at the upper end of the device.

[0009] Preferably, the lower support assembly includes a lower clamp, which has the same structure as the upper clamp. The bottom of the lower clamp is slidably connected to a second round steel plate, and the sliding direction of the lower clamp is parallel to the axial direction of the connecting bolts on it, so that the left and right semicircular rings of the lower clamp slide closer or further apart on the second round steel plate. A lower frame is provided at the bottom of the second round steel plate, and a working platform at the lower end of the device is provided on the lower side of the lower frame.

[0010] As a preferred embodiment, several sliding beams are provided at the bottom of both the upper and lower clamps, and corresponding sliding grooves are opened on the circular steel plate one and circular steel plate two, with the sliding beams slidingly positioned within the sliding grooves.

[0011] Preferably, the lifting assembly includes a sliding hoop, which is slidably mounted on the bridge column. The sliding hoop includes symmetrically arranged semicircular rings, with stiffening brackets at the connection points of the semicircular rings and connected to the corresponding stiffening brackets by connecting bolts. Rollers are provided on the inner side of the sliding hoop, and the rollers roll and connect to the outer surface of the bridge column. A support plate is provided on the outer side of the sliding hoop, and a lifting power component is provided on the support plate. The output end of the lifting power component is connected to a transverse screw, the axis of which is perpendicular to the axis of the bridge column. The transverse screw is rotatably mounted on the support plate, and a movable pin is threaded onto the transverse screw. An upper pull rod and a lower pull rod are rotatably connected to both sides of the movable pin, respectively. The upper end of the upper pull rod is rotatably mounted on the upper frame through an upper connecting pin, and the lower end of the lower pull rod is rotatably mounted on the lower frame through a lower connecting pin. At least two upper and lower pull rods are symmetrically arranged about the axis of the bridge column. At least two sets of lifting assemblies are symmetrically arranged on both sides of the bridge column.

[0012] Preferably, the device also includes a limiting assembly, including a limiting sleeve, which is mounted on the sliding hoop and rotatably sleeved in the middle of the transverse lead screw. The transverse lead screw is a bidirectional lead screw, and the moving pins at both ends of the bidirectional lead screw can simultaneously move closer to or further away from each other. The two ends of the bidirectional lead screw are symmetrically provided with drop limiters, and the two ends of the limiting sleeve are provided with rise limiters. Both the drop limiters and the rise limiters are used to limit the movement of the moving pins on the transverse lead screw.

[0013] Preferably, the position of the riser limiter is such that when the moving pin contacts the riser limiter, the angle between the axes of the upper and lower pull rods and the axis of the transverse lead screw is 75°, and the position of the fall limiter is such that when the moving pin contacts the fall limiter, the angle between the axes of the upper and lower pull rods and the axis of the transverse lead screw is 30°.

[0014] Preferably, the movable pin has a threaded hole in the middle for threaded connection to the transverse lead screw, and both ends of the movable pin have rotatable shafts with the axis of the shaft perpendicular to the axis of the threaded hole. Each shaft has an anti-loosening bolt hole for rotatably connecting the upper or lower pull rod by bolts.

[0015] Preferably, the work platform includes guardrails and bamboo plywood. Multiple guardrails are installed on the upper and lower frames. Bamboo plywood is installed on the upper frame and between the guardrails. The bamboo plywood below the lower frame and the bamboo plywood on the upper frame form the platform base for supporting the workers.

[0016] The effects provided in the utility model description are merely those of the embodiments, and not all the effects of the utility model. The above technical solution has the following advantages:

[0017] This invention features an upper and lower support assembly that alternately connects to the bridge column, providing alternating support. A lifting assembly then moves either the upper or lower support assembly up and down, enabling the entire device to move vertically. This design allows for use in various construction situations, such as with bridge columns in water or on complex terrain, enhancing its practicality. The lifting assembly, symmetrically positioned about the bridge column on both the upper and lower support assemblies, improves the stability and safety of the device's movement. A built-in work platform with safety railings accommodates workers for extended use, further enhancing practicality and safety. Finally, the invention incorporates a lowering limiter and a raising limiter to control the maximum travel during each ascent and descent, ensuring both safety and proper stress distribution. Attached Figure Description

[0018] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0019] Figure 1 This is a schematic diagram of the overall front view of an embodiment of the present utility model;

[0020] Figure 2 This is a schematic side view of the overall structure of an embodiment of the present utility model;

[0021] Figure 3 This is a top view of the overall structure of an embodiment of the present utility model;

[0022] Figure 4 This is a top view of the connection between the upper clamp and the round steel plate in an embodiment of the present utility model.

[0023] Figure 5 This is an enlarged cross-sectional view of the connection between the slide beam and the slide groove in an embodiment of this utility model;

[0024] Figure 6 This is a top view of the connection of the upper frame in an embodiment of the present utility model;

[0025] Figure 7 This is a partial front view schematic diagram of the lifting assembly according to an embodiment of the present utility model;

[0026] Figure 8 This is a partial side view of the lifting assembly according to an embodiment of the present utility model;

[0027] Figure 9 This is a schematic diagram showing the angles of the upper pull rod and lower pull rod relative to the transverse lead screw in an embodiment of this utility model;

[0028] Figure 10 This is a schematic diagram of the structure of the movable pin in an embodiment of the present utility model.

[0029] In the diagram: 1. Upper clamp; 2. Reinforcing bracket; 3. Connecting bolt; 4. Slide beam; 5. Round steel plate one; 6. Slide groove; 7. Upper frame; 8. Upper tie rod; 9. Upper connecting pin; 10. Lower tie rod; 11. Lower connecting pin; 12. Lower frame; 13. Moving pin; 14. Horizontal threaded rod; 15. Lower clamp; 16. Lifting power component; 17. Slide clamp; 18. Support plate; 19. Platform base plate; 20. Guardrail; 21. Bamboo plywood; 22. Lowering limiter; 23. Raising limiter; 24. Limiting sleeve; 25. Round steel plate two; 26. Threaded hole; 27. Anti-loosening bolt hole; 28. Bridge column. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] like Figures 1-10 As shown, this utility model provides a technical solution:

[0032] A concrete bridge column climbing device includes a support unit, a lifting assembly, and a working platform. The support unit includes an upper support assembly and a lower support assembly, which are positioned vertically on the bridge column 28. The upper and lower support assemblies are connected by the lifting assembly, which is also movably connected to the bridge column 28. A working platform is provided on both the upper and lower support assemblies for carrying construction personnel. The upper and lower support assemblies are used to alternately connect the bridge column 28 to support the device and move along the length of the bridge column 28. The lifting assembly is used to drive the upper or lower support assembly that is not connected to the bridge column 28 to move up and down.

[0033] In an optional embodiment, the upper support assembly includes an upper clamp 1 made of steel plate. The upper clamp 1 includes symmetrically arranged semicircular rings. A stiffening bracket 2 is provided at the connection position of the semicircular rings and is connected to the corresponding stiffening bracket 2 by connecting bolts 3. This allows the upper clamp 1 to be temporarily connected and fixed to the surface of the concrete bridge column 28 through friction via its inner surface, forming a support point. The bottom of the upper clamp 1 is slidably connected to a circular steel plate 5. The sliding direction of the upper clamp 1 is parallel to the axial direction of the connecting bolts 3 when connecting the stiffening brackets 2. This allows the left and right semicircular rings of the upper clamp 1 to slide closer or further apart on the circular steel plate 5. An upper frame 7 is provided at the bottom of the circular steel plate 5. A working platform for the upper end of the device is provided on the upper side of the upper frame 7. Preferably, the circular steel plate 5 and the upper frame 7 are both set as two symmetrical parts to be spliced ​​and fitted on the outside of the bridge column 28. The left and right parts can be connected by welding or bolts. The circular steel plate 5 and the upper frame 7 are slidably connected to the bridge column 28 or not connected at all, so as to facilitate the overall movement of the upper support assembly on the bridge column 28.

[0034] In an optional embodiment, the lower support assembly includes a lower clamp 15 made of steel plate. The lower clamp 15 has the same structure as the upper clamp 1. The bottom of the lower clamp 15 is slidably connected to a second round steel plate 25. The sliding direction of the lower clamp 15 is parallel to the axial direction of the connecting bolt 3 on it, which allows the left and right semicircles of the lower clamp 15 to slide closer or further apart on the second round steel plate 25. A lower frame 12 is provided at the bottom of the second round steel plate 25. A working platform at the lower end of the device is provided on the lower side of the lower frame 12. Preferably, the second round steel plate 25 and the lower frame 12 are both set as two symmetrical parts to be spliced ​​and fitted on the outside of the bridge column 28. The left and right parts can be connected by welding or bolts. The second round steel plate 25 and the lower frame 12 are slidably connected to the bridge column 28 or not connected, so as to facilitate the overall movement of the lower support assembly on the bridge column 28.

[0035] In an optional embodiment, several sliding beams 4 are provided at the bottom of both the upper clamp 1 and the lower clamp 15. The sliding beams 4 can be made of T-shaped channel steel. Sliding grooves 6 are opened on both the round steel plate 1 5 and the round steel plate 2 25 corresponding to the sliding beams 4. The sliding grooves 6 adopt double-supported slots, and the sliding beams 4 are slidably arranged in the sliding grooves 6.

[0036] In an optional embodiment, the lifting assembly adopts a lantern-shaped design, achieving vertical displacement through lateral deformation. The lifting assembly includes a sliding hoop 17, which is slidably mounted on the bridge column 28. The sliding hoop 17 includes symmetrically arranged semicircular rings, with stiffening brackets 2 connected at the connection points of the semicircular rings and connected to the corresponding stiffening brackets 2 by connecting bolts 3. Rollers are provided on the inner side of the sliding hoop 17, rolling and connecting to the outer surface of the bridge column 28 to reduce friction. A support plate 18 is provided on the outer side of the sliding hoop 17, and a lifting power component 16 is provided on the support plate 18. The lifting power component 16 is a servo motor capable of forward and reverse rotation, and the output end of the lifting power component 16 is connected to... A transverse lead screw 14 is connected, with its axis perpendicular to the axis of the bridge column 28. The transverse lead screw 14 is rotatably mounted on the support plate 18. A movable pin 13 is threaded onto the transverse lead screw 14. An upper pull rod 8 and a lower pull rod 10 are rotatably connected to both sides of the movable pin 13, respectively. The upper end of the upper pull rod 8 is rotatably mounted on the upper frame 7 via an upper connecting pin 9, and the lower end of the lower pull rod 10 is rotatably mounted on the lower frame 12 via a lower connecting pin 11. At least two upper pull rods 8 and lower pull rods 10 are symmetrically arranged about the axis of the bridge column 28. Preferably, at least two sets of lifting components are symmetrically arranged on both sides of the bridge column 28 to improve the stability and safety of the device during lifting.

[0037] In an optional embodiment, a limiting component is also included, including a limiting sleeve 24, which is disposed on the sliding hoop 17 and rotatably sleeved on the middle of the transverse lead screw 14. The transverse lead screw 14 is a bidirectional lead screw, and both ends of the bidirectional lead screw are provided with movable pins 13. The movable pins 13 at both ends can simultaneously move closer to or further away from each other. The two ends of the bidirectional lead screw are symmetrically provided with drop limiters 22. The drop limiters 22 may not be connected to the bidirectional lead screw, and are preferably disposed on the support plate 18. They are only used to contact the movable pins 13 and limit the movable pins 13. The two ends of the limiting sleeve 24 are provided with rise limiters 23. The rise limiters 23 may also not be connected to the bidirectional lead screw, and are preferably disposed on the support plate 18. They are only used to contact the movable pins 13 and limit the movable pins 13.

[0038] In an optional embodiment, the position of the riser limiter 23 is such that when the moving pin 13 contacts the riser limiter 23, the angle between the axes of the upper pull rod 8 and the lower pull rod 10 and the axis of the transverse lead screw is 75°; the position of the fall limiter 22 is such that when the moving pin 13 contacts the fall limiter 22, the angle between the axes of the upper pull rod and the lower pull rod and the axis of the transverse lead screw is 30°; the working stroke of the device is divided into 4 levels, and the angle between the upper pull rod and the transverse lead screw is... (n is 1, 2, 3, 4 respectively), Level 1 (Initial Stage) =30°, Level 2 =45°, Level 3 =60°, Level 4 =75° (highest degree), such as Figure 9 As shown, point O is the end where the lifting power component is installed, and point A is the end where the horizontal lead screw is supported. When the moving pin moves to point B, that is... =30° is the initial state of the device, which is also the lowest descent state. A drop limit switch is set at point B; when the moving pin moves to point C, that is... Check the equipment operation when the angle is 45°. When the moving pin moves to point D, that is... When the angle reaches 60°, check the equipment operation again. When the moving pin moves to point E, that is... When the angle reaches 75°, check the equipment operation. This point is the highest operating point of the equipment. Install a height limiter and limit sleeve at point E to control the highest point of the device's rise, which can ensure the safety and reasonable force distribution of the equipment.

[0039] In an optional embodiment, a threaded hole 26 is provided in the middle of the movable pin 13 for threaded connection of the transverse lead screw 14. Both ends of the movable pin 13 include a rotating shaft with a rotatable axis perpendicular to the axis of the threaded hole 26. Anti-loosening bolt holes 27 are provided on the rotating shaft for rotating connection of the upper pull rod 8 or the lower pull rod 10 by bolts, so as to avoid affecting the rotation and support of the upper pull rod 8 or the lower pull rod 10.

[0040] In an optional embodiment, the work platform includes guardrails 20 and bamboo plywood 21. Multiple guardrails 20 are provided on the upper frame 7 and the lower frame 12. Preferably, the guardrails 20 are made of angle iron welded into a protective frame. Bamboo plywood 21 is provided on the upper frame 7 and between the guardrails 20 to provide support and protection for construction workers. The bamboo plywood 21 below the lower frame 12 and the bamboo plywood 21 on the upper frame 7 form the platform base plate 19, which is used to support the workers, making it convenient for workers to stand and work, and improving safety.

[0041] Working principle: During the lifting process, first tighten the connecting bolts 3 of the lower clamp 15 so that the lower clamp 15 is tightly clamped to the bridge column 28, forming the lower support point of the device. Then loosen the connecting bolts 3 of the upper clamp 1 by about 20-30mm, but do not loosen them completely, so that the two semi-circular rings are still connected by the connecting bolts 3. Slide the bottom sliding beam 4 of the upper clamp 1 backward along the sliding groove 6 on the circular steel plate 5 by 20-30mm, so that the upper clamp 1 is disengaged from the bridge column 28. When the gap reaches 20-30mm, the lifting power component 16 is activated, and the transverse screw 14 is rotated forward or backward, so that the upper frame 7 at the upper end of the device is raised or lowered. At this time, the sliding beam 4 and the sliding groove 6 participate in the force transmission at the same time, driving the upper clamp 1 to rise or fall, completing one working step of raising or lowering the upper clamp 1. Then tighten the connecting bolts 3 of the upper clamp 1, so that The upper clamp 1 is tightly clamped to the bridge column 28, forming the upper support point of the device. The connecting bolts 3 of the lower clamp 15 are loosened by 20-30mm, but not completely, so that the two semi-circular rings of the lower clamp 15 are still connected by the connecting bolts 3. The bottom sliding beam 4 of the lower clamp 15 is slid backward along the sliding groove 6 on the circular steel plate 25 by 20-30mm, so that the lower clamp 15 is disengaged from the bridge column 28. When the gap reaches 20-30mm, the lifting power component 16 is activated, and the transverse screw 14 is rotated forward or backward, so that the lower frame 12 at the lower end of the device is raised or lowered. At this time, the sliding beam 4 and the sliding groove 6 participate in the force transmission to raise or lower the lower clamp 15, completing one working step of raising or lowering the lower clamp 15. When the upper clamp 1 and the lower clamp 15 move alternately, the construction personnel are located on the working platform to reach any height on the bridge column 28.

[0042] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.

[0043] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0044] 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. In the description of this utility model, "multiple" means two or more unless otherwise explicitly specified.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0046] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A concrete bridge column climbing device, comprising a support unit, a lifting assembly, and a working platform, characterized in that, The support unit includes an upper support assembly and a lower support assembly, which are set on the bridge column (28) one above the other. The upper support assembly and the lower support assembly are connected by a lifting assembly, which is also movably connected to the bridge column (28). Both the upper support assembly and the lower support assembly are equipped with working platforms. The upper support assembly and the lower support assembly are used to alternately connect the bridge column (28) to support the device. The lifting assembly is used to drive the upper support assembly or the lower support assembly that is not connected to the bridge column (28) to move up and down.

2. The concrete bridge column climbing device according to claim 1, characterized in that: The upper support assembly includes an upper clamp (1), which includes symmetrically arranged semicircular rings on the left and right. A stiffening bracket (2) is provided at the connection position of the semicircular rings and is connected to the corresponding stiffening bracket (2) by a connecting bolt (3). The bottom of the upper clamp (1) is slidably connected to a circular steel plate (5). The sliding direction of the upper clamp (1) is parallel to the axial direction when the connecting bolt (3) is connected to the stiffening bracket (2), which enables the left and right semicircular rings of the upper clamp (1) to slide close to or away from each other on the circular steel plate (5). An upper frame (7) is provided at the bottom of the circular steel plate (5), and a working platform at the upper end of the device is provided on the upper side of the upper frame (7).

3. The concrete bridge column climbing device according to claim 2, characterized in that: The lower support assembly includes a lower clamp (15), which has the same structure as the upper clamp (1). The bottom of the lower clamp (15) is slidably connected to a round steel plate (25). The sliding direction of the lower clamp (15) is parallel to the axial direction of the connecting bolt (3) on it, which allows the left and right semicircular rings of the lower clamp (15) to slide close to or away from each other on the round steel plate (25). A lower frame (12) is set at the bottom of the round steel plate (25), and a working platform at the lower end of the device is set on the lower side of the lower frame (12).

4. The concrete bridge column climbing device according to claim 3, characterized in that: Several sliding beams (4) are provided at the bottom of the upper clamp (1) and the lower clamp (15). Sliding grooves (6) are opened on the first round steel plate (5) and the second round steel plate (25) corresponding to the sliding beams (4). The sliding beams (4) are slidably set in the sliding grooves (6).

5. A concrete bridge column climbing device according to claim 4, characterized in that: The lifting assembly includes a sliding hoop (17), which is slidably mounted on the bridge column (28). The sliding hoop (17) includes symmetrically arranged semicircular rings. A stiffening bracket (2) is provided at the connection position of the semicircular rings and is connected to the corresponding stiffening bracket (2) by a connecting bolt (3). A roller is provided on the inner side of the sliding hoop (17), and the roller rolls to connect to the outer surface of the bridge column. A support plate (18) is provided on the outer side of the sliding hoop (17), and a lifting power component (16) is provided on the support plate (18). The output end of the lifting power component (16) is connected to a transverse screw (14). The axis of 14) is perpendicular to the axis of the bridge column. The transverse screw (14) is rotatably mounted on the support plate (18). The transverse screw (14) is threaded with a movable pin (13). The two sides of the movable pin (13) are rotatably connected to the upper pull rod (8) and the lower pull rod (10). The upper end of the upper pull rod (8) is rotatably mounted on the upper frame (7) through the upper connecting pin (9). The lower end of the lower pull rod (10) is rotatably mounted on the lower frame (12) through the lower connecting pin (11). Both the upper pull rod (8) and the lower pull rod (10) are symmetrically arranged with at least two rods about the axis of the bridge column.

6. A concrete bridge column climbing device according to claim 5, characterized in that: At least two sets of lifting components are symmetrically arranged on both sides of the bridge column (28).

7. A concrete bridge column climbing device according to claim 6, characterized in that: It also includes a limiting component, including a limiting sleeve (24), which is set on the sliding hoop (17) and rotatably sleeved in the middle of the transverse screw (14). The transverse screw (14) is a bidirectional screw. The moving pins (13) at both ends of the bidirectional screw can move closer or further away at the same time. The two ends of the bidirectional screw are symmetrically provided with a drop limiter (22), and the two ends of the limiting sleeve (24) are provided with a rise limiter (23). The drop limiter (22) and the rise limiter (23) are both used to limit the movement of the moving pin (13) on the transverse screw (14).

8. A concrete bridge column climbing device according to claim 7, characterized in that: The position of the rise limiter (23) is such that when the moving pin (13) contacts the rise limiter (23), the angle between the axis of the upper pull rod (8) and the lower pull rod (10) and the axis of the transverse screw (14) is 75°. The position of the fall limiter (22) is such that when the moving pin (13) contacts the fall limiter (22), the angle between the axis of the upper pull rod (8) and the lower pull rod (10) and the axis of the transverse screw (14) is 30°.

9. A concrete bridge column climbing device according to claim 8, characterized in that: A threaded hole (26) is provided in the middle of the movable pin (13) for threaded connection of the transverse lead screw (14). Both ends of the movable pin (13) include a rotating shaft with a rotating axis perpendicular to the axis of the threaded hole (26). Anti-loosening bolt holes (27) are provided on the rotating shaft for rotating connection of the upper pull rod (8) or the lower pull rod (10) by bolt.

10. A concrete bridge column climbing device according to claim 9, characterized in that: The work platform includes guardrails (20) and bamboo plywood (21). Multiple guardrails (20) are installed on the upper frame (7) and the lower frame (12). Bamboo plywood (21) is installed on the upper frame (7) and between the guardrails (20). The bamboo plywood (21) below the lower frame (12) and the bamboo plywood (21) on the upper frame (7) form the platform base plate (19) for supporting the workers.

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