Cable replacing device for concrete-filled steel tube arch bridge

Abstract

The invention discloses a concrete filled steel tube arch bridge cable replacing device, and relates to the field of bridge maintenance, the concrete filled steel tube arch bridge cable replacing device comprises a structural frame, two upper inhaul cables, two lower inhaul cables and winches, the structural frame adopts a structure that one side of a waist part protrudes outwards and the other side of the waist part sinks inwards, and the number of the upper inhaul cables and the number of the lower inhaul cables are both two; the two upper inhaul cables are installed at the two ends of the upper portion of the structural frame respectively, the two lower inhaul cables are installed at the two ends of the lower portion of the structural frame respectively, the winch is installed in the structural frame, the lower inhaul cables are wound on the winch, and the upper inhaul cables, the lower inhaul cables and the structural frame are jointly combined to form an inhaul cable structure system to provide traction force for replacing the inhaul cables of the arch bridge. And the stress of the original and old inhaul cable is relieved. When arch bridge cable replacement is carried out through the device, only the upper inhaul cable and the lower inhaul cable need to be installed in a targeted mode in the whole process, then the winch is remotely controlled or controlled to release stress of the old inhaul cable, then the old inhaul cable is replaced, the operation process is simple, and replacement is convenient.

Description

Technical Field

[0001] The invention relates to the field of bridge cable replacement, and in particular to a cable replacement device for a steel tube concrete arch bridge. Background Art

[0002] As is known, the slings in the steel tube concrete cable arch bridge are flexible slings, which are usually made of cold-rolled rough round steel and high-strength steel wire. Due to the quality of structural materials, construction technology level, design load level, improper use and maintenance in the later period, and the impact of environmental erosion on the bridge structure, the slings need to be regularly inspected and replaced to ensure the safety of the bridge;

[0003] At present, when replacing the steel tube concrete sling, large-scale machinery and equipment are required for construction work. During operation, the bridge generally needs to be controlled and blocked, and traffic can be opened after the sling is replaced, which affects traffic. In addition, the replacement of the corresponding sling in the existing technology is extremely cumbersome and consumes a lot of manpower and material resources. Due to the long-term structural influence of the bridge, during the replacement of the sling, the old sling is prone to residual stress (either from the original or from the external environment), resulting in the end of the sling popping out at the moment of removal, posing a safety hazard. Summary of the invention

[0004] (I) Purpose of the invention

[0005] In view of this, the purpose of the present invention is to propose a cable changing device for a steel tube concrete arch bridge. When the cable changing device is in use, the entire process only requires the targeted installation of the upper cable and the lower cable, and then the remote control / control winch is used to release the stress of the old cable, and then the old cable is replaced. The operation process is simple and the replacement is convenient.

[0006] (II) Technical solution

[0007] In order to achieve the above technical objectives, the present invention provides a steel tube concrete arch bridge cable replacement device, which is used to assist in the replacement of arch bridge cables, and includes a structural frame, an upper cable, a lower cable and a winch, wherein the structural frame adopts a structure in which one side of the waist is convex outward and the other side is concave inward, and the concave position of the concave side of the structural frame extends at least to behind the center line of the structural frame, so that when the structural frame is placed in the position where the cable is to be replaced, the vertical cable can be located in the concave position of the structural frame, and two upper cables and two lower cables are provided. The two upper cables are respectively installed at the upper two end positions of the structural frame for connecting to the arch top of the arch bridge, and the two lower cables are respectively installed at the lower two end positions of the structural frame for connecting to the bridge body of the arch bridge. The winch is installed in the structural frame, and the lower cable is wound on the winch. The upper cable, the lower cable and the structural frame are combined together to form a cable structure system to provide traction for replacing the cables of the arch bridge and relieve the stress of the original old cables.

[0008] As a further description of the above technical solution: U-shaped connectors are installed at the ends of the upper cable and the lower cable.

[0009] As a further description of the above technical solution: a three-link component is installed at the bottom position of the upper cable, and reinforcing hangers are integrally formed or welded at both ends of the upper surface of the structural frame. Both ends of the reinforcing hangers are fixedly connected to the three-link component through connecting chains, so that the connection position of the upper cable and the structural frame forms a triangular structure.

[0010] As a further description of the above technical solution: two winch chambers and one motor chamber are provided inside the structural frame, wherein the two winch chambers are respectively located at two ends of the structural frame, the motor chamber is located at the convex structure at the waist of the structural frame, the winch is mounted in the winch chamber, a dual-axis traction motor is installed in the motor chamber, a main shaft is mounted in the structural frame, the output shaft of the dual-axis traction motor is transmission-connected to the main shaft, a gear box with a speed change gear set is installed in the winch chamber at the end position of the main shaft, and the speed change gear set is transmission-connected to the rotating shaft of the winch.

[0011] As a further description of the above technical solution: a protective mechanism is detachably mounted in the recessed structure of the structural frame, and the protective mechanism includes an assembly frame plate and a protective sleeve frame, wherein the assembly frame plate is detachably mounted in the recessed structure of the structural frame, and the protective sleeve frame is located between the structural frame and the recessed structure of the structural frame, and a cavity is provided inside the protective sleeve frame, and a buffering protective module is installed in the cavity, and a through hole is opened in the center of the buffering protective module for the cable to pass through. When there is residual stress in the old cable and the old cable rebounds at the moment of removal, the end structure of the rebounded old cable can be stuck in the buffering protective module due to the old cable passing through the through hole. Through the buffering and locking of the buffering protective module, the end of the old cable will not pop out but be stuck in the through hole, thereby realizing safety protection of the operation process and improving the safety of the cable replacement process.

[0012] As a further description of the above technical solution: a plurality of the buffer protection modules are installed, and the plurality of buffer protection modules are arranged equidistantly in the vertical direction, and buffer protection springs are installed between the plurality of buffer protection modules and on both sides of the through hole.

[0013] As a further description of the above technical solution: a limiting groove is provided on the side surface of the buffer protection module in the vertical direction, and a limiting strip corresponding to the limiting groove is provided on the inner wall of the cavity, and the limiting strip is slidably engaged in the limiting groove.

[0014] As a further description of the above technical solution: a sliding hole is opened inside the buffer protection module in the vertical direction, and a center rod is installed between two adjacent buffer protection modules. The center rod adopts a variable cross-section structure with a bottom diameter larger than the rod diameter. The bottom of the center rod is slidably sleeved in the sliding hole on the buffer protection module located below, and the top is fixed to the bottom of the buffer protection module located above. The buffer protection spring is sleeved on the center rod.

[0015] As a further description of the above technical solution: the protective sleeve frame adopts a two-petal structure, one petal of which is installed on the fixed protective sleeve frame, and the other petal is installed on the inner side of the concave structure of the structural frame. The buffer protection module is in two petals, which are respectively assembled inside the two-petal protective sleeve frame. When the assembly frame plate is assembled in place, the two-petal structural protective sleeve frame is combined to form a whole, and the buffer protection modules inside it correspond one to one to form a whole.

[0016] As a further description of the above technical solution: the protective sleeve frame includes a fixed sleeve frame and a movable sleeve frame, wherein the fixed sleeve frame is fixedly installed on the outer wall of the structural frame, and the movable sleeve frame is movably installed on the inner side of the assembly frame plate, and the movable sleeve frame can move in the horizontal direction. A hydraulic jack is also installed in the structural frame, and a push plate is installed at the front end of the hydraulic rod of the hydraulic jack, and the outer wall of the structural frame is provided with a groove that can accommodate the push plate.

[0017] As a further description of the above technical solution: in order to achieve the installation of the protective sleeve frame, in this embodiment, the structural frame is located on the inner side of the concave structure and is provided with a side assembly opening, and the assembly frame plate is adapted to the side assembly opening.

[0018] As a further description of the above technical solution: the structural frame is provided with snap-fit ​​holes at the upper parts of both sides of the concave structure, and the snap-fit ​​holes extend to the interior of the assembly frame plate. The protection mechanism also includes a locking assembly, and the locking assembly is composed of an arch rod and locking rods installed under the two ends of the arch rod. When the assembly frame plate is installed, the two locking rods on the locking assembly are directly inserted into the two snap-fit ​​holes.

[0019] In the above technical scheme, the present invention provides a cable replacement device for a steel tube concrete arch bridge. When the cable replacement device is used, the entire process only needs to install the upper cable and the lower cable in a targeted manner, and then remotely control / control the winch to release the stress of the old cable, and then replace the old cable. The operation process is simple and the replacement is convenient. In addition, this replacement method does not affect the overall structure of the arch bridge, nor does it affect the use of the arch bridge, that is, the cable replacement operation does not require the arch bridge to be blocked;

[0020] Secondly, a protective mechanism is installed in the cable-changing device, through which when there is residual stress in the old cable and it rebounds at the moment of removal, the old cable passes through the through hole in the protective mechanism, and the end structure of the rebounded old cable can be stuck in the buffer protection module in the protective mechanism. Through the buffering and locking of the buffer protection module, the end of the old cable will not pop out but will be stuck in the through hole, thereby realizing safety protection of the operation process and improving the safety of the cable-changing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the overall structure of a cable-changing device for a steel tube concrete arch bridge provided by the present invention;

[0023] Figure 2 A schematic diagram of the overall structure of a cable-changing device for a steel tube concrete arch bridge provided by the present invention from another perspective;

[0024] Figure 3 A schematic diagram of the internal structure of a structural frame in a cable replacement device for a steel tube concrete arch bridge provided by the present invention;

[0025] Figure 4 A schematic diagram of a winch transmission structure in a cable changing device for a steel tube concrete arch bridge provided by the present invention;

[0026] Figure 5 A schematic diagram of the structure of a steel tube concrete arch bridge cable replacement device provided by the present invention when the protective mechanism is removed;

[0027] Figure 6 A cable changing device for a steel tube concrete arch bridge provided by the present invention Figure 5 Schematic diagram of the enlarged structure of the middle A area;

[0028] Figure 7 A schematic diagram of the structure of a locking assembly in a cable changing device for a steel tube concrete arch bridge provided by the present invention;

[0029] Figure 8 A schematic diagram of the structure of a protective mechanism in a cable-changing device for a steel tube concrete arch bridge provided by the present invention;

[0030] Fig. 9 A schematic diagram of the bottom structure of a protective sleeve frame in a cable replacement device for a steel tube concrete arch bridge provided by the present invention;

[0031] Fig.10 A partial cross-sectional view of a protective sleeve frame in a cable replacement device for a steel tube concrete arch bridge provided by the present invention;

[0032] Fig.11 A schematic diagram of the installation structure of a buffer protection module in a cable replacement device for a steel tube concrete arch bridge provided by the present invention;

[0033] Fig.12 A schematic diagram of the connection structure of a buffer protection module in a cable changing device of a steel tube concrete arch bridge provided by the present invention.

[0034] Description of the drawings: 1. Structural frame; 1-1. Winch chamber; 1-2. Motor chamber; 1-3. Side assembly opening; 1-4. Snap-fit ​​hole; 1-5. Receptacle; 10. Handrail; 11. Bracket; 110. Universal wheel; 12. Tool box; 13. Dual-axis traction motor; 130. Main shaft; 14. Gear box; 140. Variable speed gear set; 15. Winch; 2. Protection mechanism; 20. Locking assembly; 200. Locking rod; 201. Arch rod; 21. Assembly frame plate; 21 0. Slideway; 22. Protective sleeve; 220. Fixed sleeve; 221. Movable sleeve; 2210. Slide plate; 222. Buffer protection module; 2220. Limiting groove; 2221. Through hole; 223. Cavity; 224. Center rod; 225. Buffer protection spring; 226. Limiting strip; 23. Hydraulic jack; 230. Push plate; 3. Lower pull cable; 30. U-shaped connector; 4. Upper pull cable; 40. Three-link component; 41. Connecting chain; 42. Strengthening hanging plate. DETAILED DESCRIPTION

[0035] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, and use. It should be understood that in all of these figures, the same or similar reference numerals indicate the same or similar parts and features. The various drawings only schematically represent the concepts and principles of the embodiments of the present disclosure, and do not necessarily show the specific dimensions and proportions of the various embodiments of the present disclosure. Specific parts in specific drawings may be exaggerated to illustrate the relevant details or structures of the embodiments of the present disclosure.

[0036] Example 1

[0037] This embodiment provides a steel tube concrete arch bridge cable replacement device, which is used to assist in replacing the arch bridge cable. Figures 1 to 4As shown, it includes a structural frame 1, an upper cable 4, a lower cable 3 and a winch 15, wherein the structural frame 1 adopts a structure in which one side of the waist is convex outward and the other side is concave inward. The structural frame 1 is used as the main structure, which can bear the load strength required for replacing the cable. The whole structure adopts an integrally formed reinforced steel structure. The concave position of the concave side of the structural frame 1 extends at least to behind the center line of the structural frame 1, so that when the structural frame 1 is placed in the position where the cable is to be replaced, the vertical cable can be located in the concave part of the structural frame 1. In the position, there are two upper cables 4 and two lower cables 3. The two upper cables 4 are respectively installed at the upper two ends of the structural frame 1 for connecting to the arch top of the arch bridge. The two lower cables 3 are respectively installed at the lower two ends of the structural frame 1 for connecting to the bridge body of the arch bridge. The winch 15 is installed in the structural frame 1, and the lower cable 3 is wound on the winch 15. The upper cables 4, the lower cables 3 and the structural frame 1 are combined to form a cable structure system, which provides traction for replacing the cables of the arch bridge and relieves the stress of the original old cables.

[0038] Working principle: When the device is used, the structural frame 1 is first moved to the position where the old cable is to be replaced, and the old cable is passed into the concave position of the structural frame 1, and then the upper cable 4 and the lower cable 3 are fixedly connected to the arch and the bridge body of the arch bridge respectively (the arch and the bridge body are pre-buried and / or reserved for installing the upper cable 4 and the lower cable 3). When the winch 15 is started to straighten the upper cable 4 and the lower cable 3, the upper cable 4, the lower cable 3 and the old cable are all in the same plane, and the winch 15 is continuously controlled to make After the device provides tension to the upper cable 4 and the lower cable 3 to reach a preset value (the preset value is the maximum tension parameter provided to the arch top and the bridge body of the arch bridge at this position when the old cable is designed), the upper cable 4 and the lower cable 3 replace the original cable to provide tension to the arch top and the bridge body of the arch bridge, and the stress transfer of the original cable is released. Then the original cable is removed and a new cable is installed. After the new cable is replaced, the winch 15 is controlled to gradually release the lower cable 3 until the upper cable 4 and the lower cable 3 are relaxed, and then they are removed, and the cable replacement operation is completed;

[0039] To sum up, when the cable-changing device is in use, the entire process only requires the targeted installation of the upper cable 4 and the lower cable 3, and then the remote control / control winch 15 is used to release the stress of the old cable, and then the old cable is replaced. The operation process is simple and the replacement is convenient. In addition, this replacement method will not affect the overall structure of the arch bridge, nor will it affect the use of the arch bridge, that is, the cable-changing operation does not require the arch bridge to be blocked.

[0040] This embodiment provides a cable replacement device for a steel tube concrete arch bridge, such as Figure 1 to Figure 2 As shown, in order to achieve fixed connection between the upper cable 4, the lower cable 3 and the arch top and the bridge body of the arch bridge, in this embodiment, U-shaped connectors 30 are installed at the ends of the upper cable 4 and the lower cable 3.

[0041] It should be noted that components for installing U-shaped connectors 30 are pre-buried on both sides of the installation position of each cable on the arch top and bridge body of the arch bridge, that is, fixing points for the upper cables 4 and the lower cables 3 are provided.

[0042] This embodiment provides a cable replacement device for a steel tube concrete arch bridge, such as Figure 1 to Figure 2 As shown, in order to improve the overall connectivity and connection strength between the upper cable 4 and the structural frame 1, in this embodiment, a three-link component 40 is installed at the bottom position of the upper cable 4, and reinforcing hangers 42 are integrally formed or welded at both ends of the upper surface of the structural frame 1, and both ends of the reinforcing hanger plate 42 are fixedly connected to the three-link component 40 through a connecting chain 41, so that the connection position between the upper cable 4 and the structural frame 1 forms a triangular structure, thereby improving the stability and connection strength of the connection between the upper cable 4 and the structural frame 1.

[0043] This embodiment provides a cable replacement device for a steel tube concrete arch bridge, such as Figure 3 to Figure 4 As shown, in order to realize the installation and control of the winch 15, in this embodiment, two winch chambers 1-1 and a motor chamber 1-2 are provided inside the structural frame 1, wherein the two winch chambers 1-1 are respectively located at the two ends of the structural frame 1, and the motor chamber 1-2 is located at the convex structure of the waist of the structural frame 1, and the winch 15 is mounted in the winch chamber 1-1, and a dual-axis traction motor 13 is installed in the motor chamber 1-2, and a main shaft 130 is mounted in the structural frame 1, and the output shaft of the dual-axis traction motor 13 is transmission-connected with the main shaft 130, and a gear box 14 with a speed change gear set 140 is installed at the end position of the main shaft 130 in the winch chamber 1-1, and the speed change gear set 140 is transmission-connected with the rotating shaft of the winch 15. When the dual-axis traction motor 13 is in operation, it can synchronously drive the rotation of the two winches 15 through the main shaft 130 and the speed change gear set 140, thereby realizing the synchronous control of the two lower pull ropes 3.

[0044] It should be noted that: on the one hand, the convex structure on one side of the waist of the structural frame 1 can enable the other side of the structural frame 1 to have a concave space without affecting the overall strength of the structural frame 1, and on the other hand, it can provide installation space for internal equipment such as the dual-axis traction motor 13 and the main shaft 130.

[0045] Specifically, in order to facilitate the overall movement of the device and the installation of the pull-down cable 3, in this embodiment, Figures 1 to 4 As shown, a bracket 11 is installed at the bottom of the structural frame 1, and a universal wheel 110 is installed at the bottom of the bracket 11. A handrail 10 for convenient movement of the pushing device is installed at one end of the structural frame 1, and a tool box 12 is installed at the other end for storing tools and when the device is not in use, the upper pull rope 4 is stored in the tool box 12, thereby facilitating the overall movement of the device.

[0046] Example 2

[0047] This embodiment provides a cable replacement device for a steel tube concrete arch bridge, such as Figure 5 , Figure 8 to Figure 4 As shown, in order to solve the problem that when the old cable is replaced, due to the influence of bridge stress, the stress of the old cable is residual, causing the end of the old cable to bounce up and injure people at the moment of removal, in this embodiment, a protective mechanism 2 is detachably mounted in the concave structure of the structural frame 1, and the protective mechanism 2 includes an assembly frame plate 21 and a protective sleeve frame 22. The assembly frame plate 21 is detachably mounted at the concave structure of the structural frame 1, and the protective sleeve frame 22 is located between the structural frame 1 and the concave structure of the structural frame 1. The interior of the protective sleeve frame 22 is provided with a cavity 223. A buffer protection module 222 is installed in the cavity 223, and a through hole 2221 is opened in the center of the buffer protection module 222 for the cable to pass through. When there is residual stress in the old cable and it rebounds at the moment of removal, since the old cable passes through the through hole 2221, the end structure of the rebounded old cable can be stuck in the buffer protection module 222. Through the buffering and locking of the buffer protection module 222, the end of the old cable will not pop out but will be stuck in the through hole 2221, thereby realizing safety protection of the operation process and improving the safety of the cable replacement process.

[0048] This embodiment provides a cable replacement device for a steel tube concrete arch bridge, such as Figures 10 to 12 As shown, in order to solve the problem of damage to the protective sleeve frame 22 caused by the instant rebound of the old cable when it is disassembled, in this embodiment, a plurality of buffer protection modules 222 are installed, and the plurality of buffer protection modules 222 are arranged equidistantly in the vertical direction. Buffer protection springs 225 are installed between the plurality of buffer protection modules 222 and on both sides of the through hole 2221. In this way, when the old cable rebounds instantly when it is disassembled, the end structure of the old cable is stuck in the through hole 2221 and passes through the buffers on the plurality of buffer protection modules 222 in sequence. The protective spring 225 unloads the force, thereby reducing the damage to the protective sleeve frame 22 and improving its use. In order to enable the buffer protection module 222 to better clamp the end structure of the old cable, the through holes 2221 on the buffer protection module 222 all adopt a trumpet-shaped structure with a diameter gradually expanding from top to bottom. Therefore, when the end structure of the old cable falls into the through hole 2221 at the bottom, it will not directly clamp the edge of the buffer protection module 222 at one time, causing damage to the bottom of the buffer protection module 222.

[0049] This embodiment provides a cable changing device for a steel tube concrete arch bridge. In order to ensure the stability of the buffer protection module 222 during movement, Figures 10 to 12As shown, in the present embodiment, a limiting groove 2220 is provided on the side surface of the buffer protection module 222 in the vertical direction, and a limiting strip 226 corresponding to the limiting groove 2220 is provided on the inner wall of the cavity 223, and the limiting strip 226 is slidably engaged in the limiting groove 2220. In this way, when the buffer protection module 222 is moved under force, it can always maintain the upward and downward sliding under the limiting action of the limiting strip 226 and the limiting groove 2220, and no lateral deviation will occur, thereby ensuring the stability of the movement.

[0050] This embodiment provides a cable changing device for a steel tube concrete arch bridge, in order to further ensure the stability of the buffer protection module 222 during movement, such as Figures 10 to 12 As shown, in this embodiment, a sliding hole is opened in the interior of the buffer protection module 222 along the vertical direction, and a center rod 224 is installed between two adjacent buffer protection modules 222. The center rod 224 adopts a variable cross-section structure in which the bottom diameter is larger than the rod diameter. The bottom of the center rod 224 is slidably sleeved in the sliding hole on the buffer protection module 222 located below, and the top is fixed to the bottom of the buffer protection module 222 located above. The buffer protection spring 225 is sleeved on the center rod 224. Therefore, when the buffer protection module 222 slides up and down under force, the center rod 224 can further ensure the consistency of the vertical movement of all buffer protection modules 222 and provide a fixing structure for the buffer protection spring 225. The top of the sliding hole has a step structure with a variable cross-section, and the bottom of the center rod 224 can be clamped by the step structure to prevent it from falling out.

[0051] This embodiment provides a cable replacement device for a steel tube concrete arch bridge, such as Figures 10 to 12 As shown, in order to solve the problem of how to connect the old cable to the through hole 2221 on the buffer protection module 222 when the assembly frame plate 21 is installed, in this embodiment, the protection sleeve frame 22 adopts a two-petal structure, one petal is installed on the fixed protection sleeve frame 22, and the other petal is installed on the inner side of the concave structure of the structural frame 1. The buffer protection module 222 is in two petals, which are respectively assembled inside the two-petal protection sleeve frame 22. When the assembly frame plate 21 is assembled in place, the two-petal structure protection sleeve frame 22 is combined to form a whole, and the buffer protection modules 222 inside it correspond to each other one by one to form a whole. Such a structural setting can realize the installation of the assembly frame plate 21 without affecting the installation of the old cable.

[0052] Furthermore, a docking structure capable of cooperating with each other is provided on the connecting surfaces of the two-petal buffer protection module 222 and the two-petal protection sleeve frame 22, wherein the docking structure includes holes and pins which are not shown in the figure, that is, the holes and the pins are in the same straight line. When the two-petal buffer protection module 222 and the two-petal protection sleeve frame 22 are docked, the pins are inserted into the holes to achieve the combination consistency of the buffer protection module 222 and the protection sleeve frame 22.

[0053] Specifically, the protective sleeve frame 22 includes a fixed sleeve frame 220 and a movable sleeve frame 221, wherein the fixed sleeve frame 220 is fixedly installed on the outer wall of the structural frame 1, and the movable sleeve frame 221 is movably installed on the inner side of the assembly frame plate 21. The movable sleeve frame 221 can move in the horizontal direction. A hydraulic jack 23 is also installed in the structural frame 1. The front end of the hydraulic rod of the hydraulic jack 23 is equipped with a push plate 230. The outer wall of the structural frame 1 is provided with a groove 1-5 that can accommodate the push plate 230. The setting of the groove 1-5 can prevent the push plate 230 from being exposed prematurely and blocking the installation of the movable sleeve frame 221.

[0054] Specifically, a slide plate 2210 is installed on one side of the movable sleeve 221 connected to the assembly frame plate 21, and a slide groove 210 is opened on the inner side of the assembly frame plate 21 along the horizontal direction. The slide plate 2210 slides and engages with the slide groove 210 to achieve a movable connection between the movable sleeve 221 and the assembly frame plate 21.

[0055] Assembly process: before installing the protective sleeve 22, first move the structural frame 1 to make the old cable stuck in the half through hole 2221 of the buffer protection module 222 on the inner side of the fixed sleeve 220, and then assemble the protective sleeve 22. At this time, the movable sleeve 221 and the fixed sleeve 220 have a certain distance in the horizontal direction to ensure that the old cable will not block the movable sleeve 221. After the protective sleeve 22 is installed in place, the movable sleeve 221 and the fixed sleeve 220 are in the same straight line. By opening the hydraulic jack 23, the push plate 230 pushes the movable sleeve 221 to move horizontally until it cooperates with the fixed sleeve 220 to clamp the old cable, and the assembly is completed.

[0056] Further, in order to realize the installation of the protective sleeve frame 22, as Figures 5 to 8 As shown, the structural frame 1 is provided with side assembly openings 1-3 on the inner side of the concave structure, and the assembly frame plate 21 is adapted to the side assembly openings 1-3. During assembly, the assembly frame plate 21 is directly inserted into the corresponding side assembly openings 1-3. After the assembly frame plate 21 is pushed to the bottom, the movable sleeve frame 221 is assembled in place.

[0057] Furthermore, in order to ensure the stability and position fixation of the protective sleeve frame 22 after installation, as Figure 5 , Figure 7 and Figure 8 As shown, the structural frame 1 is provided with snap-fit ​​holes 1-4 at the upper parts of both sides of the concave structure, and the snap-fit ​​holes 1-4 extend to the interior of the assembly frame plate 21. The protection mechanism 2 also includes a locking component 20, and the locking component 20 is composed of an arch rod 201 and a locking rod 200 installed under both ends of the arch rod 201. When the assembly frame plate 21 is installed, the two locking rods 200 on the locking component 20 are directly inserted into the two snap-fit ​​holes 1-4, so as to lock the assembly frame plate 21, thereby avoiding the loosening and misalignment of the protective sleeve frame 22.

[0058] The exemplary implementation scheme of the present disclosure is described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present disclosure, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present disclosure can be combined in various ways without exceeding the protection scope of the present disclosure, which is determined by the attached claims.

Claims

1. A cable replacement device for a steel tube concrete arch bridge, which is used to assist in the replacement of arch bridge cables, characterized in that: It includes: The structural frame (1) adopts a structure in which one side of the waist is convex outward and the other side is concave inward, and the concave position of the concave side of the structural frame (1) extends at least to behind the center line of the structural frame (1), so that when the structural frame (1) is placed in a position where the cable is to be replaced, the vertical cable can be located in the concave position of the structural frame (1); Two upper cables (4) are provided and are respectively installed at the upper two ends of the structural frame (1) and are used to connect with the arch of the arch bridge; Two lower cables (3) are provided and are respectively installed at two ends of the lower side of the structural frame (1) and are used to connect with the bridge body of the arch bridge; A winch (15) is installed in the structural frame (1), and the lower cable (3) is wound around the winch (15); The upper cables (4), the lower cables (3) and the structural frame (1) are combined together to form a cable structure system, which provides traction for replacing cables of the arch bridge and relieves the stress of the original old cables.

2. A cable replacement device for a steel tube concrete arch bridge according to claim 1, characterized in that: The ends of the upper cable (4) and the lower cable (3) are both installed with U-shaped connecting pieces (30).

3. A cable replacement device for a steel tube concrete arch bridge according to claim 2, characterized in that: A three-link component (40) is installed at the bottom of the upper cable (4), and reinforcing hangers (42) are integrally formed or welded at both ends of the upper surface of the structural frame (1), and both ends of the reinforcing hangers (42) are fixedly connected to the three-link component (40) via a connecting chain (41), so that the connection position between the upper cable (4) and the structural frame (1) forms a triangular structure.

4. The cable replacement device for a steel tube concrete arch bridge according to claim 1, characterized in that: Two winch chambers (1-1) and a motor chamber (1-2) are provided inside the structural frame (1), wherein the two winch chambers (1-1) are respectively located at two ends of the structural frame (1), and the motor chamber (1-2) is located at the outer convex structure of the waist of the structural frame (1); the winch (15) is mounted in the winch chamber (1-1), a double-axis traction motor (13) is installed in the motor chamber (1-2), a main shaft (130) is mounted in the structural frame (1), the output shaft of the double-axis traction motor (13) is connected to the main shaft (130) in a transmission manner, and a gear box (14) with a speed change gear set (140) is installed at the end position of the main shaft (130) in the winch chamber (1-1), and the speed change gear set (140) is connected to the rotating shaft of the winch (15) in a transmission manner.

5. The cable replacement device for a steel tube concrete arch bridge according to claim 1, characterized in that: A protective mechanism (2) is detachably mounted in the concave structure of the structural frame (1), and the protective mechanism (2) comprises: An assembly frame plate (21) which is detachably mounted on the concave structure of the structural frame (1); A protective sleeve frame (22) located between the structural frame (1) and the concave structure of the structural frame (1); The protective sleeve (22) is provided with a cavity (223) inside, a buffer protection module (222) is installed in the cavity (223), and a through hole (2221) for the cable to pass through is opened at the center of the buffer protection module (222). When stress remains in the old cable and the old cable rebounds at the moment of removal, the end structure of the rebounded old cable can be stuck in the buffer protection module (222) because the old cable passes through the through hole (2221). Through the buffering and locking of the buffer protection module (222), the end of the old cable will not pop out but will be stuck in the through hole (2221), thereby achieving safety protection for the operation process and improving the safety of the cable replacement process.

6. A cable replacement device for a steel tube concrete arch bridge according to claim 5, characterized in that: A plurality of the buffer protection modules (222) are installed, and the plurality of buffer protection modules (222) are arranged equidistantly in the vertical direction. Buffer protection springs (225) are installed between the plurality of buffer protection modules (222) and on both sides of the through hole (2221).

7. A cable replacement device for a steel tube concrete arch bridge according to claim 6, characterized in that: A limiting groove (2220) is provided on the side surface of the buffer protection module (222) in the vertical direction, and a limiting strip (226) corresponding to the limiting groove (2220) is provided on the inner wall of the cavity (223), and the limiting strip (226) is slidably engaged in the limiting groove (2220).

8. The cable replacement device for a steel tube concrete arch bridge according to claim 7, characterized in that: The interior of the buffer protection module (222) is provided with a sliding hole in the vertical direction, and a center rod (224) is installed between two adjacent buffer protection modules (222). The center rod (224) adopts a variable cross-section structure with a bottom diameter larger than a rod diameter. The bottom of the center rod (224) is slidably sleeved in the sliding hole on the buffer protection module (222) located below, and the top is fixed to the bottom of the buffer protection module (222) located above. The buffer protection spring (225) is sleeved on the center rod (224).

9. A cable changing device for a steel tube concrete arch bridge according to any one of claims 5 to 7, characterized in that: The protective sleeve frame (22) adopts a two-petal structure, wherein one petal is mounted on the fixed protective sleeve frame (22), and the other petal is mounted on the inner side of the concave structure of the structural frame (1); the buffer protection module (222) is in two petals, which are respectively assembled inside the two-petal protective sleeve frame (22); when the assembly frame plate (21) is assembled in place, the two-petal structural protective sleeve frame (22) is combined to form an integral body, and the buffer protection modules (222) inside the two-petal structural protective sleeve frame are formed into an integral body in one-to-one correspondence.

10. A cable replacement device for a steel tube concrete arch bridge according to claim 9, characterized in that: The protective sleeve frame (22) comprises a fixed sleeve frame (220) and a movable sleeve frame (221), wherein the fixed sleeve frame (220) is fixedly mounted on the outer wall of the structural frame (1), and the movable sleeve frame (221) is movably mounted on the inner side of the assembly frame plate (21); the movable sleeve frame (221) can move in a horizontal direction; a hydraulic jack (23) is also mounted in the structural frame (1); a push plate (230) is mounted at the front end of a hydraulic rod of the hydraulic jack (23); and a receiving groove (1-5) capable of accommodating the push plate (230) is provided on the outer wall of the structural frame (1).

Images