A device for detecting damage to a stay cable

Abstract

The utility model discloses a kind of cable-stayed cable damage detection devices, including fixed end, moving frame, detection section, remote display terminal, between fixed end and moving frame setting traction rope and the power mechanism for retraction traction rope, moving frame, detection section is detachably installed in the outside of cable-stayed cable so that moving frame moves with the traction direction of traction rope, drives detection section to move in the outside of cable-stayed cable, range finding sensor and camera on detection section are used, the outside of cable-stayed cable surrounded is range finding and visually inspected, and data is transmitted in real time to remote display terminal and is shown, cooperatively cooperate to realize the detection to the outside damage of cable-stayed cable, and can be back and forth retest, improve detection quality, avoid relying on single photographing robot mode to depend on artificial judgment, reduce the moving difficulty and volume weight of moving frame and detection section on cable-stayed cable, convenient to dismount and replace.

Description

Technical Field

[0001] This utility model relates to the field of cable-stayed bridge maintenance technology. More specifically, this utility model relates to a cable-stayed bridge damage detection device. Background Technology

[0002] Detection of external damage to cable-stayed bridges is a key aspect of routine maintenance, including issues such as PE sheath damage, broken wrapping tape, and surface corrosion. Detection primarily relies on manual labor or robots with cable-climbing capabilities. Manual visual inspection involves close-range observation using bridge inspection vehicles, suspended platforms, or drones, combined with high-resolution camera recording of surface conditions. This method is experience-dependent, carries significant risks due to high-altitude operations, and easily misses minor damage. Robot or drone inspections suffer from poor stability in complex weather conditions, high equipment costs (a single robot can cost up to 800,000 RMB), and a large overall volume and weight on the cable. The robot's mobility is limited, and its impact on the cable surface is unpredictable. Single-vision inspection methods still rely on manual image comparison, making it difficult to guarantee inspection quality and requiring a large amount of comparison work. Summary of the Invention

[0003] The purpose of this invention is to provide a cable-stayed bridge damage detection device to solve the technical problems of inconvenience and high cost in detecting damage to the outer side of cable-stayed bridges in the prior art.

[0004] To achieve these objectives and other advantages according to the present invention, a cable-stayed bridge damage detection device is provided, comprising:

[0005] The fixed end includes a fixed frame fixed to the main beam of the tower. An electric rope winder and a power module are installed on the fixed frame. The electric rope winder leads out a traction rope to the side of the tensioned cable. The length of the traction rope covers the length of the cable to be tested.

[0006] A movable frame is detachably mounted around the outside of the stay cable. Rollers are provided on the inner side of the movable frame facing the stay cable for free rolling relative to the stay cable. A traction end is provided at the upper end of the movable frame, and the traction end is connected to the lower end of the traction rope.

[0007] The detection section includes several detection frames arranged circumferentially on the outside of the cable stay. The upper end of the detection frame is connected to the bottom of the moving frame. Several distance measuring sensors are arranged on the inner side of the detection frame facing the cable stay. All distance measuring sensors are arranged at intervals circumferentially. A camera is arranged on the bottom of the detection frame facing the cable stay. A power supply module for providing power to the distance measuring sensors and camera is also provided on the detection frame.

[0008] The remote display terminal is communicatively connected to the ranging sensor, camera, electric rope retractor, and power module. It is used to receive and display data transmitted by the ranging sensor and camera, to operate the electric rope retractor, and to display the power level of the power module.

[0009] Preferably, the bottom of the detection frame is connected to an L-shaped frame radially outward, and the camera is detachably fixed to the outer end of the L-shaped frame.

[0010] Preferably, a protective plate is provided on the outside of the electric rope retractor and the power module on the fixing frame.

[0011] Preferably, the movable frame includes two C-shaped sleeves arranged opposite each other on the outside of the stay cable. The inner side of the sleeves faces the stay cable and the rollers are arranged at intervals along the length direction. The outer sides of the two ends of the sleeves extend in the tangential direction to form an installation section. The installation section is provided with a plurality of lower screw holes. The two installation sections on the same side of the two sleeves are covered and connected by a fixing plate. The fixing plate is provided with upper screw holes corresponding to the lower screw holes. Bolts are screwed into the corresponding lower screw holes and upper screw holes for fastening.

[0012] Preferably, the upper end of the mobile frame has symmetrically arranged grooves extending circumferentially on both the inner and outer radial sides, the lower part of the traction end is a downward-facing U-shaped slider, the two ends of the U-shaped slider slide against the grooves on the corresponding sides, and the upper part of the traction end is connected to the lower end of the traction rope.

[0013] Preferably, the two ends of the U-shaped slider extend inward to form sliding ends, and pulleys are connected to the sliding ends, which are slidably connected to the corresponding side walls of the slide groove through the pulleys.

[0014] This utility model has at least the following beneficial effects: The cable-stayed bridge damage detection device of this utility model includes a fixed end, a movable frame, a detection section, and a remote display terminal. A traction rope and a power mechanism for raising and lowering the traction rope are set between the fixed end and the movable frame. The movable frame and the detection section are detachably installed on the outside of the cable-stayed bridge, so that the movable frame moves with the traction direction of the traction rope, driving the detection section to move on the outside of the cable-stayed bridge. Using the distance measuring sensor and camera on the detection section, the distance measuring and visual inspection of the outer side of the cable-stayed bridge are performed, and the data is transmitted to the remote display terminal in real time for display. Together, they realize the detection of damage on the outside of the cable-stayed bridge and can perform back-and-forth testing, which improves the detection quality, avoids relying on manual judgment by a single photo-taking robot, reduces the difficulty of moving the movable frame and the detection section on the cable-stayed bridge and reduces their size and weight, making it easy to disassemble, install, and replace.

[0015] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0016] Figure 1 This is the main view of the present invention.

[0017] Figure 2 This is a block diagram of the communication connection structure of this utility model.

[0018] Explanation of reference numerals in the accompanying drawings: 1. Stay cable, 2. Fixing frame, 3. Electric rope retractor, 4. Power module, 5. Traction rope, 6. Moving frame, 7. Roller, 8. Traction end, 9. Detection frame, 10. Distance sensor, 11. Camera, 12. L-shaped frame, 13. Protective plate, 14. Sleeve, 15. Fixing plate, 16. Bolt, 17. Slide groove, 18. Pulley. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0020] In the description of this utility model, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] like Figure 1 , Figure 2 As shown, the cable-stayed bridge damage detection device of this utility model includes:

[0022] The fixed end includes a fixed frame 2 fixed on the main beam of the tower. An electric rope retractor 3 and a power module 4 are installed on the fixed frame 2. The electric rope retractor 3 leads out a traction rope 5 to the side of the tensioned cable 1. The length of the traction rope 5 covers the length of the cable 1 to be tested.

[0023] The movable frame 6 is detachably arranged around the outside of the cable 1. The inner side of the movable frame 6 is provided with rollers 7 facing the cable 1 for free rolling relative to the cable 1. The upper end of the movable frame 6 is provided with a traction end 8, which is connected to the lower end of the traction rope 5.

[0024] The detection section includes several detection frames 9 arranged circumferentially on the outside of the cable 1. The upper end of the detection frame 9 is connected to the bottom of the moving frame 6. Several distance sensors 10 are arranged on the inner side of the detection frame 9 facing the cable 1. All distance sensors 10 are arranged at intervals circumferentially. A camera 11 is arranged on the bottom of the detection frame 9 facing the cable 1. A power supply module for providing power to the distance sensors 10 and the camera 11 is also provided on the detection frame 9.

[0025] The remote display terminal is communicatively connected to the ranging sensor 10, the camera 11, the electric rope retractor 3, and the power module 4. It is used to receive and display the data transmitted by the ranging sensor 10 and the camera 11, to operate the switch of the electric rope retractor 3, and to display the power level of the power module 4.

[0026] To facilitate the inspection of the suspended platform, a fixed frame 2 and an electric rope retractor 3 are installed to reduce the frequency of personnel going up and down for maintenance. A rubber structure with a certain weight can be installed at the end of the traction rope 5 to facilitate the lowering of the traction rope 5. The fixed frame 2 is set in advance at a suitable position on the tower to install and protect the electric rope retractor 3 and the power module 4 that powers the electric rope retractor 3. It can be set as a small generator, solar charging, or a periodically replaceable battery. The electric rope retractor 3 is a commercially available product with remote control switch, such as a rope retractor for wire rope, suspension rope, or safety rope, or a hoist is set at the end of the moving frame 6 to fix the upper end of the traction rope 5 to the fixed end. This is a common product in the suspended platform field and will not be described in detail here. The moving frame 6 and the inspection section have a relatively light overall structure and only need to achieve traction movement. Before inspection, the traction rope is released by the electric rope retractor 3. 5. The cable descends to the bridge deck; the moving frame 6 is composed of two detachable halves, with a continuous transition at the joint. The lower end of the traction rope 5 is fixedly connected to the traction end 8 of the moving frame 6. After splicing, the roller 7 can roll smoothly on the cable 1. The detection frame 9 of the detection section can be set independently or can be set as a structure that can be spliced ​​into an integral ring. The distance sensor 10 measures the distance at different positions on the outside of the cable 1 along the circumference as needed, mainly used to detect the stability of the outer linearity and thickness. The camera 11 is mainly used to transmit images to detect external damage to the cable 1. The camera 11 and the distance sensor 10 work together to detect damage on the outside of the cable 1. For abnormal changes in the data of the distance sensor 10, the camera 11 is used for re-inspection to improve the detection accuracy and reduce human judgment errors based solely on images. The camera 11 can also be equipped with a storage module for review after a single inspection.

[0027] After installing the mobile frame 6 and the inspection section on the outer side of the bottom of cable-stayed cable 1, the electric rope retractor 3 is activated on a remote display terminal such as a mobile phone to begin retrieving the traction rope 5. Pulling the mobile frame 6, the inspection section moves upwards along the length of cable-stayed cable 1 under the action of the rollers 7. Once raised to the top, a single unidirectional inspection is completed. Then, the traction rope 5 is released, and the inspection section moves downwards along the length of cable-stayed cable 1 for a re-inspection. After reaching the bottom of cable-stayed cable 1 on the bridge deck, the construction personnel disconnect the traction rope 5 from the mobile frame 6, remove the mobile frame 6 and the inspection section, and reinstall them on the outer side of the bottom of the next cable-stayed cable 1. They are then reconnected to the traction rope 5, and the aforementioned operation is repeated for a round trip inspection of the next cable-stayed cable 1. After the inspection is completed, the electric rope retractor 3 retrieves the traction rope 5. The communication connection method is selected based on the communication distance, such as a mobile network, or a corresponding signal transmitting module is installed on the interconnected devices for receiving signals.

[0028] This utility model discloses a damage detection device for a stay cable 1, comprising a fixed end, a movable frame 6, a detection section, and a remote display terminal. A traction rope 5 and a power mechanism for raising and lowering the traction rope 5 are provided between the fixed end and the movable frame 6. The movable frame 6 and the detection section are detachably installed on the outside of the stay cable 1, allowing the movable frame 6 to move in the traction direction of the traction rope 5, thereby moving the detection section on the outside of the stay cable 1. Using a distance sensor 10 and a camera 11 on the detection section, the device performs distance measurement and visual inspection on the outside of the stay cable 1, and transmits the data to the remote display terminal in real time for display. Together, they achieve the detection of damage on the outside of the stay cable 1 and can perform follow-up inspections, improving the detection quality and avoiding reliance on manual judgment using a single camera robot method. This reduces the difficulty of moving the movable frame 6 and the detection section on the stay cable 1, as well as their size and weight, and facilitates disassembly, installation, and replacement.

[0029] In another technical solution, such as Figure 1 As shown, the bottom of the detection frame 9 is connected to an L-shaped frame 12 radially outward, and the camera 11 is detachably fixed to the outer end of the L-shaped frame 12 to facilitate adjustment of the distance between the camera 11 and the inclined cable 1.

[0030] In another technical solution, such as Figure 1 As shown, a protective plate 13 is provided on the outside of the electric rope retractor 3 and the power module 4 on the fixed frame 2 to protect against the environment and rainwater.

[0031] In another technical solution, such as Figure 1As shown, the movable frame 6 includes two C-shaped sleeves 14 arranged opposite each other on the outside of the stay cable 1. The inner side of the sleeves 14 faces the stay cable 1 and the rollers 7 are arranged at intervals along the length direction. The outer sides of the two ends of the sleeves 14 extend in the tangential direction to form an installation section. Several screw holes are opened on the installation section. The two installation sections on the same side of the two sleeves 14 are covered and connected by a fixing plate 15. The fixing plate 15 has an upper screw hole corresponding to the screw hole. The bolts 16 are screwed into the corresponding screw holes and tightened.

[0032] Depending on the outer diameter of the stay cable 1, different lengths of fixing plates 15 can be replaced and connected and fixed between the two end sections on the same side of the two sleeves 14 to improve the applicability of movement detection on the outside of stay cables 1 of different sizes.

[0033] In another technical solution, such as Figure 1 As shown, the upper end of the mobile frame 6 is symmetrically provided with circumferentially extending grooves 17 on both the inner and outer sides of the radial direction. The lower part of the traction end 8 is a U-shaped slider with its two ends sliding against the grooves 17 on the corresponding sides. The upper part of the traction end 8 is connected to the lower end of the traction rope 5.

[0034] The slide groove 17 and slider are provided so that when the traction rope 5 pulls the traction end 8, the traction end 8 can adapt to changes in circumferential traction force and position, avoid the traction rope 5 from getting tangled, and improve traction smoothness.

[0035] In another technical solution, such as Figure 1 As shown, the two ends of the U-shaped slider extend inward to form sliding ends, and pulleys 18 are connected to the sliding ends. The pulleys 18 are slidably connected to the corresponding side walls of the groove 17.

[0036] During the traction process, the slider pushes the moving frame 6 upward, and the sliding end is equipped with a pulley 18 to reduce friction and improve the safety of the structure when it slides relative to each other.

[0037] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the drawings shown and described herein.

Claims

1. A cable-stayed bridge damage detection device, characterized in that, include: The fixed end includes a fixed frame fixed to the main beam of the tower. An electric rope winder and a power module are installed on the fixed frame. The electric rope winder leads out a traction rope to the side of the tensioned cable. The length of the traction rope covers the length of the cable to be tested. A movable frame is detachably mounted around the outside of the stay cable. Rollers are provided on the inner side of the movable frame facing the stay cable for free rolling relative to the stay cable. A traction end is provided at the upper end of the movable frame, and the traction end is connected to the lower end of the traction rope. The detection section includes several detection frames arranged circumferentially on the outside of the cable stay. The upper end of the detection frame is connected to the bottom of the moving frame. Several distance measuring sensors are arranged on the inner side of the detection frame facing the cable stay. All distance measuring sensors are arranged at intervals circumferentially. A camera is arranged on the bottom of the detection frame facing the cable stay. A power supply module for providing power to the distance measuring sensors and camera is also provided on the detection frame. The remote display terminal is communicatively connected to the ranging sensor, camera, electric rope retractor, and power module. It is used to receive and display data transmitted by the ranging sensor and camera, to operate the electric rope retractor, and to display the power level of the power module.

2. The cable-stayed bridge damage detection device as described in claim 1, characterized in that, The bottom of the detection frame is connected to an L-shaped frame radially outward, and the camera is detachably fixed to the outer end of the L-shaped frame.

3. The cable-stayed bridge damage detection device as described in claim 1, characterized in that, A protective plate is provided on the outside of the electric rope retractor and the power module on the fixed frame.

4. The cable-stayed bridge damage detection device as described in claim 1, characterized in that, The movable frame includes two C-shaped sleeves arranged opposite each other on the outside of the stay cable. The inner side of the sleeves faces the stay cable and the rollers are arranged at intervals along the length direction. The outer sides of the two ends of the sleeves extend tangentially to form an installation section. Several screw holes are opened on the installation section. The two installation sections on the same side of the two sleeves are covered and connected by a fixing plate. The fixing plate has upper screw holes corresponding to the screw holes. Bolts are screwed into the corresponding screw holes and upper screw holes for fastening.

5. The cable-stayed bridge damage detection device as described in claim 1, characterized in that, The upper end of the mobile frame has symmetrically arranged grooves extending circumferentially on both the inner and outer sides in the radial direction. The lower part of the traction end is a U-shaped slider facing downwards. The two ends of the U-shaped slider slide against the grooves on the corresponding sides. The upper part of the traction end is connected to the lower end of the traction rope.

6. The cable-stayed bridge damage detection device as described in claim 5, characterized in that, The two ends of the U-shaped slider extend inward to form sliding ends, and pulleys are connected to the sliding ends. The pulleys are slidably connected to the corresponding side walls of the sliding groove.

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