Quickly spliced main cable maintenance platform and self-propelled method

Abstract

This invention relates to a rapid-assembly main cable maintenance platform and its self-propelled access method. The platform includes an outer gantry, a middle gantry, an inner gantry, and male and female connector components. The outer gantry includes an outer front gantry and an outer rear gantry. Guide rails, slide rails, and a central truss frame are installed from top to bottom between the outer front gantry and the middle gantry, and between the middle gantry and the outer rear gantry. The inner gantry is slidably mounted on the guide rails and slide rails. Male and female connector components are correspondingly installed at the splicing points on the outer sides of the outer gantry, the middle gantry, and the central truss frame. The self-propelled access method includes the following steps. The insertion and socket fitting of the male and female connector components ensures a tight fit during locking, avoiding the tedious steps of repeated tightening required by traditional bolt connections. The overall structure of this invention is compact, and the components work together to ensure the strength of the gantry or truss splicing points while significantly shortening the assembly time. It is suitable for engineering scenarios requiring rapid on-site assembly, effectively reducing labor costs and construction cycles.

Description

Technical Field

[0001] This invention relates to a rapid splicing main cable inspection platform and its self-propelled access method, belonging to the field of suspension bridge main cable inspection and maintenance technology. Background Technology

[0002] To achieve routine maintenance and upkeep of the main cables of suspension bridges and ensure the structural safety and service life of the main cables, the use of main cable inspection platforms has become a core method. However, existing inspection platforms typically have fixed spans and limited functions, making it difficult to adapt to the diverse and differentiated needs of main cable maintenance. If designed only for routine inspections and small-scale maintenance, their limited operating span cannot meet the requirements of long-distance continuous operations such as main cable unsealing inspections and dehumidification system deployment. Conversely, if designed as a large-span, lightweight platform, although it can adapt to long-distance operations, it is often idle during routine maintenance due to redundant capacity, resulting in low resource utilization.

[0003] Meanwhile, square tubes, due to their excellent mechanical properties, are widely used as the main load-bearing components in the structural design of main cable maintenance platforms. However, when assembling square tubes using bolted connections, several technical challenges arise that affect the platform's structural safety and reliability: bolt holes significantly weaken the square tube cross-section and induce high stress concentration. Under dynamic loads such as main cable flutter, bolt loosening and preload decay are highly likely at the connection nodes, leading to interface slippage and seriously threatening the long-term reliability and structural safety of the nodes. Furthermore, this connection method places extremely stringent requirements on component processing and on-site installation accuracy. Misalignment of the hole groups not only causes installation difficulties but also introduces additional assembly stress, further exacerbating the risk of node failure and affecting the overall structural stability of the maintenance platform. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a main cable maintenance platform and a self-propelled method that allows the maintenance operation span to be adjusted as needed, enabling the maintenance platform to be quickly assembled and move autonomously.

[0005] The technical solution adopted in this invention is as follows: The rapid splicing main cable maintenance platform of this invention includes an outer gantry, a middle gantry, an inner gantry, and male and female connector components. The outer gantry includes an outer front gantry and an outer rear gantry with identical structures. Guide rails, slide rails, and a middle truss frame are installed from top to bottom between the outer front gantry and the middle gantry, and between the middle gantry and the outer rear gantry. The inner gantry is slidably installed on the guide rails and slide rails. The male and female connector components are correspondingly installed at the splicing points on the outer side of the outer gantry, the middle gantry, and the middle truss frame.

[0006] The male connector of the platform of the present invention includes a square tube A, a socket fixedly installed at one end of the square tube A, a seat plate fixedly installed at the end of the socket, and a guide shaft fixedly installed in the middle of the seat plate; the guide shaft is provided with an annular groove; a threaded hole A is provided through the top wall of the socket; the other end of the square tube A is fixedly installed at the lower part of the outer column of the outer gantry frame, the middle gantry frame, or the middle truss frame.

[0007] The female connector assembly of the platform of the present invention includes a square tube B, a socket installed at one end of the square tube B and inserted into the socket, and a self-locking assembly installed inside the square tube B and locked to the guide shaft rod; a threaded hole B corresponding to the threaded hole A is provided on the top wall of the socket; the other end of the square tube B is fixedly installed on the lower part of the outer column on the other side of the outer gantry frame, the middle gantry frame or the middle truss frame, and the square tube B and the square tube A are arranged symmetrically.

[0008] The self-locking component of this invention platform includes a pressure-resistant seat, a movable retaining seat, a limiting steel ball A, a movable base, a spring A, and a driving component. The pressure-resistant seat is fixedly installed on the inner wall of the square tube B. A truncated cone-shaped limiting cavity is provided in the inner cavity of the right end of the pressure-resistant seat. The movable retaining seat is slidably disposed within the truncated cone-shaped limiting cavity. A spring fixing chamber is provided at the left end of the movable retaining seat, and a clamping device mounting chamber adapted to the shape of the truncated cone-shaped limiting cavity is provided at the right end. The right end of the clamping device mounting chamber abuts against the end of the truncated cone-shaped limiting cavity. Three limiting holes are provided circumferentially at intervals on the outer wall of the clamping device mounting chamber. The limiting steel ball A is correspondingly embedded in each limiting hole, and the outer diameter of the limiting steel ball A is larger than the inner diameter of the limiting hole. Guide holes for the guide shaft rod to pass through are provided in the middle of the outer wall of the right end of the truncated cone-shaped limiting cavity, the left side wall, and the right side wall of the clamping device mounting chamber. The movable base is slidably disposed in the inner cavity of the left side of the pressure-resistant seat, and the spring A is fixedly disposed within the cavity. The spring A is coaxial with the guide hole and is installed in the middle between the movable base and the spring fixing chamber. The drive assembly includes a support plate fixedly installed in the left inner cavity of the square tube B corresponding to the left end of the pressure-resistant seat, a bevel gear A rotatably installed on the right side wall of the support plate, a bevel gear B rotatably installed on the inner top wall of the square tube B and meshing with the bevel gear A, and a lead screw screwed to the bevel gear A. A bearing seat is installed in the middle of the left side of the movable base. One end of the lead screw is rolled in the bearing seat, and the other end of the lead screw passes through the middle of the support plate. The lead screw is coaxial with the guide hole and passes through the inner top wall of the square tube B to install a positioning bolt on the top of the bevel gear B. The bevel gear B is coaxial with the positioning bolt. By rotating the bevel gear B through the positioning bolt, the bevel gear A is driven to rotate. The bevel gear A drives the lead screw to move left and right, adjusting the position of the movable base, thereby dynamically adjusting the tension of the spring A.

[0009] The self-locking component of the platform of this invention includes an annular grooved seat fixedly installed on the inner wall of the square tube B, a plurality of pressing plates circumferentially spaced and slidably installed on the inner wall of the grooved seat, a spring B fixedly installed between the bottom wall of the grooved seat and the pressing plates, and a limiting steel ball B rolling on the outer wall of the pressing plate. The pressing plate is provided with a limiting groove to prevent the limiting steel ball B from rolling and shifting. The pressing plate slides radially on the inner wall of the grooved seat, the spring B is arranged radially, and the limiting steel ball B abuts radially against the groove opening of the grooved seat under the elastic force of the spring B, and the outer diameter of the limiting steel ball B is smaller than the inner diameter of the groove opening of the grooved seat. The inner diameter of the central channel of the grooved seat is larger than the outer diameter of the guide shaft.

[0010] The platform of this invention has traveling components and safety components installed at both ends and the outer side of the top of the inner gantry. Internal force sensors and rolling support components are installed inside and at the bottom of the inner gantry. Support clamping mechanisms adapted to the main cable are installed inside the outer gantry, middle gantry, and inner gantry, and damping components are installed on these mechanisms. The support clamping mechanisms are electrically connected to the controller. A front guide wheel device adapted to the main cable is installed inside the outer gantry. The traveling components drive the inner gantry to move on the outer gantry. The platform also has the following components installed inside the outer front gantry, outer rear gantry, middle gantry, and inner gantry: The described support and clamping mechanism includes an inner gantry frame comprising two side frames parallel to the guide rails, two horizontal beams perpendicular to the guide rails, and four vertical supports perpendicular to the guide rails. The side frames, beams, and supports are all hollow square tubes. Each side frame and each beam is fixedly installed at both ends between the tops of two corresponding supports, forming a square frame with the two side frames, two beams, and four supports. Guide holes A communicating with the inner cavities of the side frames are provided on the outer walls of the tops of the four supports. The rolling support assembly is installed at the bottom of each support. The traveling assembly includes a rotating shaft rotatably installed within the port at the top of each support. The system includes pulleys installed at both ends of the rotating shaft, racks fixedly installed on the inner sides of the two guide rails, motor supports fixedly installed on the outer sides of both ends of one side beam, a drive motor vertically mounted on the motor supports, and a transmission gear meshing with the rack on the drive motor's transmission shaft. The two pulleys are symmetrically arranged and rotate along the top surfaces of both sides of the guide rails. The gap between the guide rails and the rack on them passes through guide hole A and the inner cavity of the frame. Reinforcing rods are fixedly installed at intervals between the tops of the outer front gantry and the middle gantry, and between the tops of the middle gantry and the outer rear gantry, or: fixedly installed at intervals between the tops of the outer front gantry and the outer rear gantry. The reinforcing rods are installed between the two guide rails, and guide holes B are provided on the two crossbeams to allow the reinforcing rods to pass through. The rolling support assembly includes support plates fixedly installed on both sides of the bottom end of the support column, two sliding wheels A rotatably installed on the upper inner side of each support plate, and three sliding wheels B rotatably installed on the lower inner side of each support plate. Both sets of sliding wheels A are located below the bottom surface of the support column. The sliding wheels A of the two support plates are symmetrically arranged, and the two sets of sliding wheels A are located on the upper surface of the slide rail. The sliding wheels B of the two support plates are symmetrically arranged, and the two sets of sliding wheels B are located on the lower surface of the slide rail.

[0011] The support and clamping mechanism of this invention platform includes a main support mechanism that contacts or separates from the upper surface of the main cable and lateral clamping mechanisms symmetrically arranged on both sides of the main cable; the two sets of lateral clamping mechanisms are symmetrically arranged about the main cable as an axis; the main support mechanism includes a vertically arranged main hydraulic cylinder and an elevation hydraulic cylinder B, the top of the main hydraulic cylinder and the elevation hydraulic cylinder B are respectively fixedly connected to the top crossbeam of the outer gantry or inner gantry, a universal ball is installed at the bottom end of the rod end of the elevation hydraulic cylinder B, and a support seat is installed at the bottom of the universal ball and the bottom rod end of the main hydraulic cylinder, the bottom surface of the support seat is provided with an arc-shaped support plate matching the shape of the upper surface of the main cable; the damping assembly includes spring dampers hinged to both sides of the main hydraulic cylinder body. A and spring damper B are arranged obliquely symmetrically about the main hydraulic cylinder. The top ends of spring dampers A and B are hinged to the top crossbeam of the outer or inner gantry frame. The lateral clamping mechanism includes an elastic buffer support assembly installed on the inner side of the outer gantry column or support column, a fixed seat fixedly installed in the elastic buffer support assembly, a lateral hydraulic cylinder rotatably installed on the fixed seat, a leg retraction mechanism installed on one side of the lateral hydraulic cylinder body, and a clamping seat fixedly installed on the rod end of the lateral hydraulic cylinder and corresponding to the side of the main cable. An arc-shaped pad corresponding to the side of the main cable is provided on the outside of the clamping seat. The elastic buffer support assembly is adjacent to the two support columns. A horizontal support rod parallel to the frame is fixedly installed between the lower parts; a leg-retracting mechanism is installed obliquely between the horizontal support rod and the cylinder body of the lateral hydraulic cylinder; the elastic buffer support assembly includes a U-shaped spring seat fixedly installed inside the outer gantry column or support column, a U-shaped buffer seat set inside the U-shaped spring seat, a side support plate fixedly installed on the inner top of the U-shaped spring seat, a buffer plate fixedly installed on the outer top of the U-shaped buffer seat corresponding to the side support plate, a guide rod fixedly installed between the side support plate and the bottom plate of the U-shaped spring seat, and a spring fitted on the outer side of the guide rod. Both the U-shaped spring seat and the U-shaped buffer seat face the opening of the main cable, and the two guide rods are symmetrically arranged, with each guide rod passing through the corresponding buffer plate with a gap. The spring is installed between the buffer plate and the U-shaped spring seat base plate; the fixed seat is installed inside the U-shaped buffer seat, and the cylinder end of the lateral hydraulic cylinder is hinged to the fixed seat through a rotating shaft, so that the leg retraction mechanism drives the lateral hydraulic cylinder to rotate laterally; the leg retraction mechanism includes an L-shaped support rod fixedly installed inside the horizontal support rod, an upper resistance inclined rod hinged to the other end of the L-shaped support rod, a lower resistance inclined rod hinged to the other end of the upper resistance inclined rod, and a retraction cylinder; the other end of the lower resistance inclined rod is hinged to the outer wall of the cylinder body of the lateral hydraulic cylinder, the cylinder end of the retraction cylinder is hinged to the inside of the horizontal support rod, the rod end of the retraction cylinder is hinged to the lug at the other end of the upper resistance inclined rod, and the retraction cylinder is located below the upper resistance inclined rod.

[0012] The safety components of this invention platform include buffer rods spaced apart on one side of the crossbeam and safety clamps spaced apart on the other side of the crossbeam. Rubber blocks are installed at the ends of the buffer rods. The buffer rods correspond to the upper frame of the outer front mast. The safety clamps clamp or release the corresponding reinforcing rods. The safety clamps are electrically connected to the controller. Diagonal braces are fixedly installed between two pillars on both sides of the inner gantry. The diagonal braces are located above the horizontal braces. The internal force sensors are installed on the inner sides of both ends of the diagonal braces. The front guide wheel device includes a vertically arranged support hydraulic cylinder, an elevation hydraulic cylinder A, a guide wheel frame, a traveling wheel symmetrically rotated at the bottom of the guide wheel frame, and a buffer assembly connected to the traveling wheel. The tops of the support hydraulic cylinder and the elevation hydraulic cylinder A are fixedly connected to the top crossbeam of the outer front mast or outer rear mast. A ball joint is installed at the bottom rod end of the elevation hydraulic cylinder A. The bottom of the ball joint and the bottom rod end of the support hydraulic cylinder are both installed on the top surface of the guide wheel frame. The bottom of the ball joint is located in the middle of the top surface of the guide wheel frame.

[0013] The present invention discloses a self-propelled method for a rapidly assembled main cable maintenance platform. When the maintenance work span reaches a preset length, an inner gantry frame is slidably installed between the outer front gantry and the middle gantry, and between the middle gantry and the outer rear gantry. The maintenance platform is then hoisted onto the main cable. The traveling wheels of the front guide wheel device are mounted on the upper surface of the main cable. The self-propelled method employs the following steps: S1. The controller separates the support and clamping mechanisms of the outer and middle gantry frames of the maintenance platform from the main cable, and the support and clamping mechanisms on the two sets of inner gantry frames hug the main cable, so that the two sets of inner gantry frames are fixed on the main cable. S2. The drive motors of the two sets of inner gantry traveling components drive the transmission gears to rotate. The transmission gears rotate along the rack, causing the outer gantry and middle gantry to slide forward relative to the main cable. The front guide wheel device ensures that the outer gantry automatically corrects its deviation when it travels. The outer gantry stops after sliding to a specified distance. S3. The controller controls the support clamping mechanisms on the outer gantry and middle gantry to clamp with the main cable, so that the outer gantry and middle gantry are fixed on the main cable; the controller controls the support clamping mechanisms of the two sets of inner gantry to separate from the main cable. S4. The drive motors of the traveling components of the two sets of inner gantry frames drive the transmission gears to rotate. The transmission gears rotate along the rack, thereby driving the two sets of inner gantry frames to slide forward relative to the main cable. When they slide to a specified distance, the two sets of inner gantry frames stop. S5. The controller controls the support clamping mechanisms on the two sets of inner gantry frames to clamp the main cable, so that the maintenance platform is fixed on the main cable as a whole. S6. Repeat S1-S5, alternating opening and closing of the support and clamping mechanisms on the outer gantry, inner gantry and middle gantry of the maintenance platform to enable the maintenance platform to creep along the main cable.

[0014] The present invention discloses a self-propelled method for a rapidly assembled main cable maintenance platform. When the maintenance work span is less than 13.5m, guide rails and slide rails, as well as a middle truss frame, are installed from top to bottom between the outer front gantry and the outer rear gantry. The inner gantry is slidably installed on the guide rails and slide rails between the outer front gantry and the outer rear gantry. The assembled maintenance platform is hoisted onto the main cable, and the traveling wheels of the front guide wheel device are set on the upper surface of the main cable. The self-entry method for short-span maintenance platforms adopts the following steps: S1. The controller separates the support clamping mechanism on the outer gantry of the maintenance platform from the main cable, and the support clamping mechanism on the inner gantry clamps the main cable, so that the inner gantry is fixed on the main cable. S2. The drive motor of the inner gantry's traveling component drives the transmission gear to rotate. The transmission gear rotates along the rack, thereby driving the outer gantry to slide forward relative to the main cable. The front guide wheel device ensures that the outer gantry automatically corrects its course during travel. The outer gantry stops after sliding to a specified distance. S3. The controller controls the support clamping mechanism on the outer gantry to clamp with the main cable, so that the outer gantry is fixed on the main cable; the controller controls the support clamping mechanism of the inner gantry to separate from the main cable. S4. The drive motor of the inner gantry's traveling assembly drives the transmission gear to rotate. The transmission gear rotates along the rack, thereby driving the inner gantry to slide forward relative to the main cable. The inner gantry stops after sliding a specified distance. S5. Control the support clamping mechanism on the inner gantry to clamp the main cable through the controller, so that the maintenance platform is fixed on the main cable as a whole. S6. Repeat S1-S5, alternating opening and closing of the support and clamping mechanisms on the outer and inner gantry frames, causing the maintenance platform to creep along the main cable.

[0015] The positive effects of this invention are as follows: The insertion and mating of the male and female connector components, combined with the snap-fit ​​structure of the annular groove and the limiting steel ball A, forms a preliminary mechanical locking mechanism. This allows for rapid positioning and locking without additional tools, simplifying the operation process. The coaxial alignment design of the guide shaft and guide hole ensures precise guidance during the insertion process, preventing component misalignment or jamming and significantly improving assembly efficiency. The elastic restoring force of spring A allows the limiting steel ball A to automatically engage with the annular groove. Through the linkage of bevel gears A and B with the lead screw, the position of the movable base can be adjusted, controlling the clamping force of spring A. This ensures a tight fit between the clamping device mounting chamber and the annular groove, forming a stable connection. This not only avoids the tedious steps of repeated tightening required in traditional bolt connections but also allows for adjustment of the spring A's clamping force according to actual working conditions, adapting to different vibration or load conditions. The alignment of the threaded hole A of the connector with the threaded hole B of the socket before installing the bolts improves the safety factor and long-term stability of the male and female connector components. The elastic restoring force of spring B allows the limiting steel ball B to automatically engage with the annular groove, while the radial sliding of the pressing plate ensures a tight fit during locking and avoids the tedious tightening process required by traditional bolt connections. This invention features a compact overall structure, with all components working synergistically to ensure the strength of the gantry or truss joints while significantly shortening assembly time. It is suitable for engineering scenarios requiring rapid on-site assembly, effectively reducing labor costs and construction cycles.

[0016] The maintenance platform of this invention adopts a transmission gear and rack meshing transmission, which can not only effectively transmit mechanical torque and improve the climbing ability of the overall structure, but also effectively record the number of gear rotations and the distance traveled, thereby accurately recording the starting and ending points of the clamping system each time, laying the foundation for the automated movement of the maintenance platform.

[0017] Furthermore, in terms of cable adaptability, the maintenance platform of this invention supports the rapid connection of multiple maintenance platforms on the main cable by setting support plates at the beginning and end, thus constructing a scalable linkage operation system. At the same time, the platform relies on the modular splicing of the central truss frame to realize flexible adjustment of the maintenance operation span—two (or three) sets of configurations can efficiently complete daily maintenance, while multiple sets of expansion can easily cope with long-span special operations. This improves the equipment's adaptability to different scenarios and operational flexibility, avoids resource idleness caused by single functions, and effectively reduces the total life cycle maintenance cost.

[0018] Regarding damage-free movement, all rolling support wheel sets of the maintenance platform of this invention are embedded within the main structure of the platform, forming an indirect force-bearing system of "support clamping - guide rail transmission." This completely eliminates direct contact between the wheels and the surface of the main cable, thereby structurally avoiding the risk of damage to the main cable's protective layer caused by sliding friction. This significantly improves the platform's low-damage operation performance and provides effective protection for the long-term service safety of the main cable. Simultaneously, the safety clamps and buffer bars of the maintenance platform of this invention provide safety assurance during platform movement.

[0019] In terms of safety protection, the maintenance platform of this invention can collect the internal force data of the diagonal bracing rods in real time by deploying internal force sensors at the upper and lower connection points of the diagonal bracing rods of the inner gantry. This allows for dynamic evaluation of the load-bearing status of the inner gantry and the safety performance of the entire machine during movement. When the monitored value exceeds the preset safety threshold, the system will issue tiered alarms, up to and including triggering a shutdown protection mechanism, thereby achieving proactive prevention and control of risks associated with heavy-load operations. Simultaneously, during high-altitude cable maintenance operations, the maintenance platform of this invention can control the clamping position of the inner gantry on the main cable through the traveling components, adapting to changes in external load in real time, automatically adjusting the internal stress distribution of the platform, and achieving stress adaptive control. This ensures that the stress of key components is always maintained within the safety threshold, significantly improving the safety of high-altitude operations under extreme weather conditions. Attached Figure Description

[0020] Appendix Figure 1 This is a schematic diagram of the axial view structure of the maintenance platform of the present invention; Appendix Figure 2 This is a schematic diagram of the axial view structure of the male and female connector components of the present invention; Appendix Figure 3 This is a front view structural diagram of the public connector component of the present invention; Appendix Figure 4 This is a front view schematic diagram of the pressure-resistant seat of the present invention; Appendix Figure 5 This is a front view schematic diagram of the movable card holder structure of the present invention; Appendix Figure 6 This is a schematic diagram of the female connector assembly structure according to Embodiment 1 of the present invention; Appendix Figure 7 This is a schematic diagram of the female connector assembly structure according to Embodiment 2 of the present invention; Appendix Figure 8 This is a schematic diagram of the male and female connector assembly structure according to Embodiment 1 of the present invention; Appendix Figure 9 This is a schematic diagram of the male and female connector assembly structure in Embodiment 1 of the present invention when disassembly is not required; Appendix Figure 10 This is a schematic diagram of the male and female connector assembly structure in Embodiment 2 of the present invention; Appendix Figure 11 This is a schematic diagram of the axial structure of the external gantry frame of the maintenance platform of the present invention; Appendix Figure 12 This is a front view schematic diagram of the external gantry structure of the maintenance platform of the present invention; Appendix Figure 13 This is a schematic diagram of the truss frame axonal structure in the maintenance platform of the present invention; Appendix Figure 14 This is a schematic diagram of the gantry structure in the maintenance platform of the present invention. Appendix Figure 15 This is a schematic diagram of the inner gantry structure of the maintenance platform of the present invention. Appendix Figure 16 This is a schematic diagram of the installation structure of spring damper A and spring damper B in the maintenance platform of the present invention. Appendix Figure 17 This is a schematic diagram of the main support mechanism and the lateral clamping mechanism of the maintenance platform of the present invention; Appendix Figure 18 This is a schematic diagram of the elastic buffer support component structure of the maintenance platform of the present invention; Appendix Figure 19 This is a schematic diagram of the leg retraction mechanism of the maintenance platform of the present invention; Appendix Figure 20 This is a schematic diagram of the working process of the leg retraction mechanism of the maintenance platform of the present invention. Appendix Figure 21 This is a schematic diagram of the shaft side structure of the front guide wheel device of the maintenance platform of the present invention; Appendix Figure 22 This is a front view structural diagram of the front guide wheel device of the maintenance platform of the present invention; Appendix Figure 23 This is a side view of the front guide wheel device of the maintenance platform of the present invention. Appendix Figure 24 This is a schematic diagram of the cover plate installation structure of the maintenance platform of the present invention; Appendix Figure 25 This is a schematic diagram of the structure of an embodiment of the self-access method for the maintenance platform of the present invention; Appendix Figure 26 This is a schematic diagram of the assembly structure of the short-span maintenance platform of the present invention; Appendix Figure 27 This is a schematic diagram of the assembly structure of the dual-platform short-span maintenance platform of the present invention; Appendix Figure 28 This is a schematic diagram of the structure of Embodiment 2 of the self-access method for the maintenance platform of the present invention.

[0021] In the attached drawings: 1 outer gantry, 100 front maintenance platform, 10 outer front gantry, 11 outer rear gantry, 12 guide rail, 121 reinforcing rod, 122 guide hole B, 13 slide rail, 14 middle truss frame, 15 rack, 16 upper support plate, 17 lower support plate, 18 maintenance passage, 19 cover plate, 191 hook, 192 mounting seat; 2. Internal gantry frame; 200. Rear maintenance platform; 20. Traveling assembly; 21. Rolling support assembly; 22. Internal force sensor; 23. Buffer rod; 24. Safety clamp; 25. Diagonal brace; 26. Horizontal brace; 201. Frame; 202. Crossbeam; 203. Support column; 204. Guide hole A; 205. Shaft; 206. Pulley; 207. Motor support; 208. Drive motor; 209. Transmission gear; 210. Support plate; 211. Sliding wheel A; 212. Sliding wheel B 3 types of gantry frames; 4. Front guide wheel assembly; 411 Support hydraulic cylinder; 412 Elevation hydraulic cylinder A; 42 Ball joint; 43 Guide wheel frame; 44 Traveling wheel; 431 Support plate; 432 Support plate A; 433 Support plate B; 434 Pressure-resistant platform A; 435 Pressure-resistant platform B; 436 Paddle A; 437 Paddle B; 438 Tie rod A; 439 Buffer rod A; 440 High-pressure spring A; 441 Tie rod B; 442 Buffer rod B; 443 High-pressure spring B; 444 Baffle plate. 5 Support and clamping mechanism, 51 Main support mechanism, 511 Main hydraulic cylinder, 512 Elevation angle hydraulic cylinder B, 513 Universal ball, 514 Support seat, 515 Arc-shaped support plate, 516 Spring damper A, 517 Spring damper B; 52 Lateral clamping mechanism, 521 Fixed seat, 522 Lateral hydraulic cylinder, 523 Clamping seat, 524 U-shaped spring seat, 525 U-shaped buffer seat, 526 Side support plate, 527 Buffer plate, 528 Guide rod, 529 Spring, 53 Reverse support rod, 530 L-shaped support rod, 531 Upper resistance inclined rod, 532 Lower resistance inclined rod, 533 Retraction cylinder, 534 Arc-shaped pad.

[0022] 6. Main cable; 70. Square tube A, 71. Socket, 72. Base, 73. Guide shaft, 74. Annular groove, 75. Threaded hole A; 80. Square tube B, 801. Slotted seat, 802. Pressing plate, 803. Spring B, 804. Limiting steel ball B, 805. Central channel, 81. Socket, 82. Threaded hole B, 83. Pressure-resistant seat, 831. Conical limiting cavity, 84. Movable seat, 841. Spring fixing chamber, 842. Clamping device mounting chamber, 843. Limiting hole, 85. Limiting steel ball A, 86. Guide hole, 87. Movable base, 88. Spring A, 89. Support plate, 90. Bevel gear A, 91. Bevel gear B, 92. Lead screw, 93. Positioning bolt, 94. Bearing seat. Detailed Implementation

[0023] Example 1: Embodiment 1 of the rapid splicing main cable maintenance platform of the present invention: As attached Figure 1 The rapid-assembly main cable maintenance platform includes an outer gantry 1, a middle gantry 3, an inner gantry 2, and male and female connector components. The outer gantry 1 includes an outer front gantry 10 and an outer rear gantry 11 with identical structures. Guide rails 12 and slide rails 13, as well as a middle truss frame 14, are installed from top to bottom between the outer front gantry 10 and the middle gantry 3, and between the middle gantry 3 and the outer rear gantry 11. The inner gantry 2 is slidably mounted on the guide rails 12 and slide rails 13. The male and female connector components are correspondingly installed at the splicing points on the outer sides of the outer gantry 1, the middle gantry 3, and the middle truss frame 14. The male and female connector components are precisely connected through a detachable plug-in structure or a fixed plug-in structure to ensure that each gantry and truss frame quickly forms a stable modular assembly system, thereby improving the installation efficiency and structural strength of the main cable maintenance platform.

[0024] As attached Figure 1-3 As shown in Figures 11-14, the male connector of the present invention includes a square tube A70, a socket 71 fixedly installed at one end of the square tube A70, a base plate 72 fixedly installed at the end of the socket 71, and a guide shaft 73 fixedly installed in the middle of the base plate 72; the guide shaft 73 is provided with an annular groove 74; a threaded hole A75 is provided through the top wall of the socket 71; the other end of the square tube A70 is fixedly installed at the lower part of the outer column of the outer gantry frame 1, the middle gantry frame 3, or the middle truss frame 14.

[0025] As attached Figure 1-2 As shown in Figures 4-6 and 11-14, the female connector assembly of the present invention includes a square tube B80, a socket 81 installed at one end of the square tube B80 and inserted into the socket 71, and a self-locking assembly installed inside the square tube B80 and locked to the guide shaft 73; a threaded hole B82 corresponding to the threaded hole A75 is provided on the top wall of the socket 81; the other end of the square tube B80 is fixedly installed on the lower part of the outer column on the other side of the outer gantry frame 1, the middle gantry frame 3, or the middle truss frame 14, and the square tube B80 and the square tube A70 are symmetrically arranged to ensure the alignment accuracy of the male connector assembly and the female connector assembly during assembly.

[0026] The self-locking assembly includes a pressure-resistant seat 83, a movable card holder 84, a limiting steel ball A85, a movable base 87, a spring A88, and a drive assembly. The pressure-resistant seat 83 is fixedly installed on the inner wall of the square tube B80. A truncated cone limiting cavity 831 is provided in the inner cavity of the right end of the pressure-resistant seat 83. The movable card holder 84 is slidably disposed in the truncated cone limiting cavity 831. A spring fixing chamber 841 is provided at the left end of the movable card holder 84, and a clamping device mounting chamber 842 adapted to the shape of the truncated cone limiting cavity 831 is provided at the right end. The right end of the clamping device mounting chamber 842 abuts against the end of the truncated cone limiting cavity 831 to realize the limited sliding of the movable card holder 84 in the pressure-resistant seat 83.

[0027] The outer wall of the clamp mounting chamber 842 is provided with three limiting holes 843 spaced circumferentially. The limiting steel balls A85 are correspondingly embedded in each limiting hole 843, and the outer diameter of the limiting steel balls A85 is larger than the inner diameter of the limiting holes 843, forming an interference fit. The outer wall of the right end of the cone limiting cavity 831, the middle of the left side wall and the right side wall of the clamp mounting chamber 842 are provided with guide holes 86 for the guide shaft rod 73 to pass through, which are used to radially limit and axially guide the guide shaft rod 73, thereby realizing the guiding positioning of the guide shaft rod 73 when it is inserted. The movable base 87 is slidably disposed in the inner cavity of the left side of the pressure seat 83. The spring A88 is fixedly installed in the middle between the movable base 87 and the spring fixing chamber 841, and the axis of the spring A88 coincides with the axis of the guide hole 86. The drive assembly includes a support plate 89 fixedly installed in the left inner cavity of the square tube B80 corresponding to the left end of the pressure-resistant seat 83, a bevel gear A90 rotatably installed on the right side wall of the support plate 89, a bevel gear B91 rotatably installed on the inner top wall of the square tube B80 and meshing with the bevel gear A90, and a lead screw 92 screwed to the bevel gear A90. A bearing seat 94 is installed in the middle of the left side of the movable base 87. One end of the lead screw 92 is rolled in the bearing seat 94, and the other end of the lead screw 92 passes through it. In the middle of the support plate 89, the lead screw 92 is coaxial with the guide hole 86, providing a support base for the rotation and guidance of the lead screw 92; a positioning bolt 93 is installed on the top of the bevel gear B91 through the inner top wall of the square tube B80, and the bevel gear B91 is coaxial with the positioning bolt 93; the bevel gear B91 is rotated by the positioning bolt 93, which drives the bevel gear A90 to rotate, and the bevel gear A90 drives the lead screw 92 to move left and right, adjusting the position of the movable base 87, thereby dynamically adjusting the tension of the spring A88.

[0028] As attached Figure 8As shown, when assembling the male and female connectors, first align the male connector's insertion port 71 with the female connector's socket 81, so that the guide shaft 73 and the guide hole 86 are coaxially aligned. Then push the male connector so that the insertion port 71 is smoothly inserted into the socket 81. The front end of the guide shaft 73 passes through the guide hole 86 on the pressure-resistant seat 83 and the movable retainer 84 in sequence, and enters the inner area of ​​the spring A88. During this process, the end of the guide shaft 73 presses against the limiting steel ball A85, forcing the limiting steel ball A85 to retract inward towards the limiting hole 843 after being compressed. At the same time, the guide shaft 73 compresses the spring A88, forcing the movable retaining seat 84 to move inward towards the pressure-resistant seat 83 after being compressed, thus making way for the movement of the guide shaft 73. When the annular groove 74 on the guide shaft 73 moves to the position of the limiting steel ball A85, the limiting steel ball A85 will automatically pop out under the elastic restoring force of the spring A88 and lock into the annular groove 74, so that the male and female components achieve initial mechanical locking. At this time, the threaded hole A75 of the socket 71 and the threaded hole B82 of the socket 81 are coaxially aligned. To further enhance the reliability of the connection, fastening bolts can be installed in the threaded hole A75 and the threaded hole B82 to achieve secondary locking, thereby completing the final stable locking.

[0029] During disassembly, first remove the fastening bolts in threaded holes A75 and B82, then rotate the bevel gear B91 through the positioning bolt 93. The bevel gear B91 then drives the bevel gear A90, which meshes with it, to rotate, thereby driving the lead screw 92 to rotate and causing the movable base 87 to move away from the clamping chamber 842, thus releasing the clamping force of the spring A88 and moving to the left. Subsequently, the clamping chamber 842 moves to the left under the tension of the spring A88, causing the limiting steel ball A85 to disengage from the annular groove 74, releasing the mechanical lock on the guide shaft rod 73. Then, pull the square tube A70 outward to smoothly pull the socket 71 out of the socket 81. The guide shaft rod 73 passes through the guide holes 86 of the movable seat 84 and the pressure seat 83 in sequence, completing the separation of the male and female components.

[0030] As attached Figure 9As shown, when no disassembly is required, fix the pressure-resistant seat 83 and the movable base 87, remove the bevel gear A90, bevel gear B91 and lead screw 92, and when assembling the male and female connectors, first align the male connector's insertion port 71 with the female connector's socket 81, so that the guide shaft 73 and the guide hole 86 are coaxially aligned. Then push the male connector so that the insertion port 71 is smoothly inserted into the socket 81. The front end of the guide shaft 73 passes through the guide hole 86 on the pressure-resistant seat 83 and the movable bracket 84 in sequence, and enters the inner area of ​​the spring A88. During this process, the end of the guide shaft 73 presses against the limiting steel ball A85, forcing the limiting steel ball A85 to retract into the limiting hole 843 after being compressed. At the same time, the guide shaft 73 compresses the spring A88, forcing the movable retaining seat 84 to move into the pressure-resistant seat 83 after being compressed, making way for the guide shaft 73 to move. When the annular groove 74 on the guide shaft 73 moves to the position of the limiting steel ball A85, the limiting steel ball A85 will automatically pop out under the elastic restoring force of the spring A88 and be locked into the annular groove 74, thus locking the male and female connection components.

[0031] The insertion and mating of the male and female connector components of this invention, with the annular groove 74 and the locking structure of the limiting steel ball A85, forms a preliminary mechanical locking mechanism. This allows for quick positioning and locking without additional tools, simplifying the operation process. The coaxial alignment of the guide shaft 73 and the guide hole 86 ensures precise guidance during the insertion process, preventing component misalignment or jamming and significantly improving assembly efficiency. The elastic restoring force of the spring A88 allows the limiting steel ball A85 to automatically engage with the annular groove 74. Through the linkage of the bevel gears A90 and B91 with the lead screw 92, the position of the movable base 87 can be adjusted, controlling the clamping force of the spring A88. This ensures a tight fit between the clamp mounting chamber 86 and the annular groove 74, forming a stable connection. This not only avoids the tedious steps of repeated tightening required by traditional bolt connections but also allows for adjustment of the spring A88's clamping force according to actual working conditions, adapting to different vibration or load conditions. After aligning the threaded hole A75 of the socket 71 with the threaded hole B82 of the socket 81, the bolts are installed, which improves the safety factor and long-term stability of the male and female mating assembly.

[0032] As attached Figure 1 , 15 As shown, the present invention has traveling components 20 and safety components installed at both ends and the outer side of the top of the inner gantry 2, and internal force sensors 22 and rolling support components 21 installed inside and at the bottom of the inner gantry 2; support clamping mechanisms 5 adapted to the main cable 6 are installed in the outer gantry 1, the middle gantry 3 and the inner gantry 2, and damping components are installed on the support clamping mechanisms 5. The support clamping mechanisms 5 are electrically connected to the controller; a front guide wheel device 4 adapted to the main cable 6 is installed in the outer gantry 1; the traveling components 20 drive the inner gantry 2 to move on the outer gantry 1. As attached Figure 1 ,26 As shown, a middle gantry 3 is installed between the outer front gantry 10 and the outer rear gantry 11 as needed; the guide rail 12, slide rail 13, and middle truss frame 14 are installed from top to bottom between the outer front gantry 10 and the middle gantry 3, and between the middle gantry 3 and the outer rear gantry 11, or: the guide rail 12, slide rail 13, and middle truss frame 14 are installed from top to bottom between the outer front gantry 10 and the outer rear gantry 11; the inner gantry 2 is slidably installed between the outer front gantry 10 and the middle gantry 3, and between the middle gantry 3 and the outer rear gantry 11, or: the inner gantry 2 is slidably installed between the outer front gantry 10 and the outer rear gantry 11; the support and clamping mechanism 5 is installed in the outer front gantry 10, the outer rear gantry 11, the middle gantry 3, and the inner gantry 2.

[0033] As attached Figure 15 As shown, the inner gantry frame 2 of the present invention includes two side frames 201 parallel to the guide rail 12, two horizontal beams 202 perpendicular to the guide rail 12, and four vertical supports 203 perpendicular to the guide rail 12. The side frames 201, horizontal beams 202, and supports 203 are all hollow square tubes. The two ends of each side frame 201 and each horizontal beam 202 are fixedly installed between the tops of two corresponding supports 203, and the tops of the two side frames 201, two horizontal beams 202, and four supports 203 enclose a square frame. Guide holes A204 communicating with the inner cavity of the side frames 201 are provided on the outer wall of the top of each of the four supports 203. The rolling support assembly 21 is installed at the bottom of each support 203. The traveling assembly 20 includes a rotating shaft 205 rotatably installed in the top port of the support 203, pulleys 206 installed at both ends of the rotating shaft 205, a rack 15 fixedly installed on the inner side of the two guide rails 12, and a motor support fixedly installed on the outer side of both ends of one horizontal beam 202. The support 207, the drive motor 208 vertically mounted on the motor support 207, and the transmission gear 209 mounted on the drive shaft of the drive motor 208 and meshing with the rack 15; two pulleys 206 are symmetrically arranged and rotate along the top surfaces of both sides of the guide rail 12; the guide rail 12 and the rack 15 on it pass through the guide hole A204 and the inner cavity of the frame 201; between the top of the outer front mast 10 and the middle gantry 3, and between the top of the middle gantry 3 and the outer rear mast 11 Reinforcing rods 121 are fixedly installed at intervals between the inner and outer gantry frames 10 and 11. The structure when the inner gantry frame 3 is not installed is as follows: Reinforcing rods 121 are fixedly installed at intervals between the tops of the outer front gantry frame 10 and the outer rear gantry frame 11. The two reinforcing rods 121 are located between the two guide rails 12. Guide holes B122 are provided on the two crossbeams 202 to allow the reinforcing rods 121 to pass through the gaps. This effectively improves the overall rigidity of the maintenance platform and ensures that the inner gantry frame 2 slides smoothly along the guide rails 12 and slide rails 13 within the outer gantry frame 1. The rack 15 facilitates the effective transmission of mechanical torque and precise positioning of the relative position of the inner gantry frame 2.

[0034] As attached Figure 15As shown, the safety component of the present invention includes a buffer rod 23 spaced on one side crossbeam 202 and a safety clamp 24 spaced on the other side crossbeam 202. A rubber block is installed at the end of the buffer rod 23. The buffer rod 23 corresponds to the upper frame of the outer front gantry 10. The safety clamp 24 clamps or releases the corresponding reinforcing rod 121. The safety clamp 24 is electrically connected to the controller. After the safety clamp 24 clamps the reinforcing rod 121, it restricts the degree of freedom of the inner gantry 2, significantly improving the stability of the inner gantry 2 when working at height and reducing swaying. The buffer rod 23 ensures that the inner gantry 2 is protected from collision damage when sliding inside the outer gantry 1. The safety clamp 24 reliably locks the inner gantry 2 at any position inside the outer gantry 1. Diagonal bracing rods 25 are fixedly installed between the two pillars 203 on both sides of the inner gantry 2. The internal force sensors 22 are installed on the inner side of both ends of the diagonal bracing rods 25. The internal force data of the diagonal bracing rods 25 are collected in real time by the internal force sensors 22, which can dynamically evaluate the load-bearing status of the inner gantry 2 and the overall safety performance of the machine.

[0035] As attached Figure 1 , 15 As shown in Figures 16 and 26, the rolling support assembly 21 of the present invention includes support plates 210 fixedly installed on both sides of the bottom end of the support column 203, two sliding wheels A211 rotatably installed on the upper inner side of each support plate 210, and three sliding wheels B212 rotatably installed on the lower inner side of each support plate 210. Both sets of sliding wheels A211 are located below the bottom surface of the support column 203. The sliding wheels A211 of the two support plates 210 are symmetrically arranged, and the two sets of sliding wheels A211 are arranged on the upper surface of the slide rail 13. The sliding wheels B212 of the two support plates 210 are symmetrically arranged, and the two sets of sliding wheels B212 are arranged on the lower surface of the slide rail 13.

[0036] As attached Figure 11 , 12 As shown in Figures 16 and 17, the support and clamping mechanism 5 of the present invention includes a main support mechanism 51 that contacts or separates from the upper surface of the main cable 6 and lateral clamping mechanisms 52 symmetrically arranged on both sides of the main cable 6; the two sets of lateral clamping mechanisms 52 are symmetrically arranged about the main cable 6; when the main support mechanism 51 and the two lateral clamping mechanisms 52 are in close contact with the upper surface and the left and right sides of the main cable 6 respectively, the maintenance platform can be clamped and fixed on the main cable 6; when the main support mechanism 51 and the two lateral clamping mechanisms 52 are simultaneously separated from the upper surface and the left and right sides of the main cable 6, the maintenance platform can slide relative to the main cable 6 through the front guide wheel device 4, the traveling component 20 and the rolling support wheel group 21, thereby enabling the maintenance platform to perform inspection and maintenance at any position on the main cable 6.

[0037] The main support mechanism 51 includes a vertically arranged main hydraulic cylinder 511 and an elevation hydraulic cylinder B512. The top of the cylinder bodies of both the main hydraulic cylinder 511 and the elevation hydraulic cylinder B512 are fixedly connected to the top crossbeam of the outer gantry 1 or the inner gantry 2. A universal ball 513 is installed at the lower rod end of the elevation hydraulic cylinder B512. The bottom of the universal ball 513 is connected to the bottom rod end of the main hydraulic cylinder 511 with a support seat 514. The main hydraulic cylinder 511 and the elevation hydraulic cylinder B512 extend and retract at different times. The change in quantity allows the support base 514 to adjust its elevation angle according to the main cable 6; the bottom surface of the support base 514 is provided with an arc-shaped support plate 515 that matches the shape of the upper surface of the main cable 6. The arc-shaped support plate 515 is an arc-shaped rubber pad, which can further achieve contact or separation with the upper surface of the main cable 6 under the extension and retraction action of the main hydraulic cylinder 511 and the elevation hydraulic cylinder B512; when in contact with the main cable 6, it can also balance the pressure of the main hydraulic cylinder 511 and the elevation hydraulic cylinder B512 on the upper surface of the main cable 6.

[0038] The damping assembly includes spring dampers A516 and B517 hinged to both sides of the main hydraulic cylinder 511. Spring dampers A516 and B517 are obliquely symmetrically arranged with the main hydraulic cylinder 511 as the axis. The top of spring dampers A516 and B517 is hinged to the top crossbeam of the outer gantry 1 or the inner gantry 2, and the bottom is hinged to the main hydraulic cylinder 511. Spring dampers A516 and B517 can effectively suppress the vertical sway of the maintenance platform caused by the vibration of the main cable 6.

[0039] As attached Figure 16-19 As shown, the lateral clamping mechanism 52 of the present invention includes an elastic buffer support assembly installed inside the column or support column 203 of the outer gantry 1, a fixed seat 521 fixedly installed inside the elastic buffer support assembly, a lateral hydraulic cylinder 522 rotatably installed on the fixed seat 521, a leg retraction mechanism installed on one side of the cylinder body of the lateral hydraulic cylinder 522, and a clamping seat 523 fixedly installed on the rod end of the lateral hydraulic cylinder 522 and corresponding to the side of the main cable 6; an arc-shaped pad 534 corresponding to the side of the main cable 6 is provided on the outside of the clamping seat 523. The arc-shaped pad 534 is an arc-shaped rubber pad, which can contact or separate from the side of the main cable 6 under the extension and retraction action of the lateral hydraulic cylinder 522; when in contact with the main cable 6, it can also balance the pressure exerted by the lateral hydraulic cylinder 522 on the side of the main cable 6. A horizontal strut 26 parallel to the frame 201 is fixedly installed between the lower parts of the two pillars 203 adjacent to the elastic buffer support assembly; a leg retraction mechanism is installed obliquely between the horizontal strut 26 and the cylinder body of the lateral hydraulic cylinder 522; the horizontal strut 26 is located below the diagonal strut 25.

[0040] The elastic buffer support assembly includes a U-shaped spring seat 524 fixedly installed inside the column or support column 203 of the outer gantry frame 1, a U-shaped buffer seat 525 disposed inside the U-shaped spring seat 524, a side support plate 526 fixedly installed inside the top of the U-shaped spring seat 524, a buffer plate 527 fixedly installed outside the top of the U-shaped buffer seat 525 corresponding to the side support plate 526, a guide rod 528 fixedly installed between the side support plate 526 and the bottom plate of the U-shaped spring seat 524, and a buffer plate 527 sleeved on the outside of the guide rod 528. The side spring 529, U-shaped spring seat 524 and U-shaped buffer seat 525 all face the opening of the main cable 6. The two guide rods 528 are symmetrically arranged, and each guide rod 528 passes through the corresponding buffer plate 527 with a gap. The spring 529 is installed between the buffer plate 527 and the bottom plate of the U-shaped spring seat 524. The fixed seat 521 is installed in the U-shaped buffer seat 525. The cylinder end of the lateral hydraulic cylinder 522 is hinged to the fixed seat 521 through a rotating shaft, so that the leg retraction mechanism drives the lateral hydraulic cylinder 522 to rotate laterally.

[0041] When the main cable 6 vibrates, causing the maintenance platform to sway laterally, the arc-shaped pad 534 contacts the side of the main cable 6, and the lateral hydraulic cylinder 522 transmits the lateral force to the fixed seat 521. The U-shaped buffer seat 525 then undergoes lateral displacement, causing the buffer plate 527 to slide along the guide rod 528 towards the bottom plate of the U-shaped spring seat 524. The spring 529, which is fitted on the outside of the guide rod 528, is compressed. The elastic deformation of the spring 529 absorbs and buffers the lateral impact force. At the same time, the guide rod 528 guides and limits the movement of the U-shaped buffer seat 525, the buffer plate 527, and the spring 529. The side support plate 526, which is fixedly installed on the inner side of the top of the U-shaped spring seat 524, together with the bottom plate of the U-shaped spring seat 524, supports the guide rod 528, ensuring that the buffering process is stable and reliable. This effectively suppresses the lateral sway of the maintenance platform caused by the vibration of the main cable 6 and improves the stability of the maintenance platform during operation.

[0042] As attached Figure 16-20 As shown, the leg-retracting mechanism of the present invention includes an L-shaped support rod 530 fixedly installed inside the horizontal support rod 26, an upper resistance rod 531 hinged to the other end of the L-shaped support rod 530, a lower resistance rod 532 hinged to the other end of the upper resistance rod 531, and a retraction cylinder 533; the other end of the lower resistance rod 532 is hinged to the outer wall of the cylinder body of the lateral hydraulic cylinder 522, the cylinder body end of the retraction cylinder 533 is hinged to the inside of the horizontal support rod 26, the rod end of the retraction cylinder 533 is hinged to the lug at the other end of the upper resistance rod 531, and the retraction cylinder 533 is located below the upper resistance rod 531.

[0043] When the leg retraction operation is required, the piston rod of the retraction cylinder 533 retracts, and its end pulls the upper resistance rod 531, causing the upper resistance rod 531 to rotate around its hinge point with the L-shaped support rod 530 towards the inside of the horizontal support rod 26. As the upper resistance rod 531 rotates, it drives the lower resistance rod 532 to move synchronously through its other hinge point. The other end of the lower resistance rod 532 pulls the lateral hydraulic cylinder 522, i.e., the lateral clamping mechanism 52, towards the inside of the horizontal support rod 26, completing the leg retraction action. When the lateral clamping mechanism 52 needs to be deployed, the piston rod of the retraction cylinder 533 extends, pushing the upper resistance rod 531 to rotate outward around its hinge point with the L-shaped support rod 530. The upper resistance rod 531 drives the lower resistance rod 532 to deploy synchronously, and the lower resistance rod 532 pushes the lateral clamping mechanism 52 outward to its working position. The leg retraction mechanism further achieves contact or separation with the sides of the main cable 6 with different curvatures. To enhance the vertical rigidity of the outer gantry 1 and the inner gantry 2, reverse support rods 53 are bolted to the middle of the columns on both sides of the outer gantry 1 and the support columns 203 on both sides of the inner gantry 2. The reverse support rods 53 are rigid rods. By setting the reverse support rods 53, they can form a reaction force group together with the two lateral clamping mechanisms 52, thereby realizing the vertical self-locking of the maintenance platform on the main cable 6 and ensuring the vertical stability of the maintenance platform.

[0044] As attached Figure 21-23 As shown, the front guide wheel device 4 of the present invention includes a vertically arranged support hydraulic cylinder 411, an elevation hydraulic cylinder A412, a guide wheel frame 43, a traveling wheel 44 symmetrically rotated and installed at the bottom of the guide wheel frame 43, and a buffer assembly connected to the traveling wheel 44. The tops of the support hydraulic cylinder 411 and the elevation hydraulic cylinder A412 are fixedly connected to the top crossbeam of the outer front mast 10 or the outer rear mast 11. A ball joint 42 is installed at the bottom rod end of the elevation hydraulic cylinder A412. The bottom of the ball joint 42 and the bottom rod end of the support hydraulic cylinder 411 are both installed on the top surface of the guide wheel frame 43, and the bottom of the ball joint 42 is located in the middle of the top surface of the guide wheel frame 43. By changing the different extension and retraction amounts of the support hydraulic cylinder 411 and the elevation hydraulic cylinder A412, the elevation angle of the guide wheel frame 43 can be adjusted with the main cable 6, and the traveling wheel 44 can also contact or separate from the upper surface of the main cable 6. The guide wheel frame 43 includes a support plate 431, support plates A432 vertically fixedly installed on both sides of one end of the support plate 431, support plates B433 vertically fixedly installed on both sides of the other end of the support plate 431, a pressure-resistant platform A434 fixedly installed between the two support plates A432, and a pressure-resistant platform B435 fixedly installed between the two support plates B433. The buffer assembly includes a lever A436 hinged to the inner side of each support plate A432, a lever B437 hinged to the inner side of the two support plates B433, a pull rod A438 fixedly installed between one end of the two levers A436, several buffer rods A439 with gaps passing through the pressure-resistant platform A434 and fixedly installed on the bottom of the pull rod A438, a high-pressure spring A440 fitted on each buffer rod A439, a pull rod B441 fixedly installed between one end of the two levers B437, several buffer rods B442 with gaps passing through the pressure-resistant platform B435 and fixedly installed on the bottom of the pull rod B441, and a high-pressure spring B443 fitted on each buffer rod B442; in the buffer rods Both A439 and buffer rod B442 have baffles 444 fixedly installed at their top ends; pull rods A438 and B441 are arranged adjacent to each other, so that pull rods A438 and B441 drive buffer rods A439 and B442 respectively, and buffer rods A439 and B442 compress high-pressure springs A440 and B443 respectively, so as to realize the slight vertical adjustment of the traveling wheel 44, thereby increasing the obstacle crossing and shock resistance of the front guide wheel device 4; the two traveling wheels 44 are respectively installed between the outer ends of the two levers A436 and B437; the traveling wheels 44 are concave wheels, and the traveling wheels 44 can be locked onto the main cable 6 when traveling and can roll along the main cable 6.

[0045] As attached Figure 17 , 24 As shown, maintenance access roads 18 are provided on both sides of the bottom between the outer front gantry 10, outer rear gantry 11, middle truss frame 14, and middle gantry 3 to facilitate the maintenance and upkeep of related equipment and main cables. Several cover plates 19 are provided between the corresponding maintenance access roads 18. One end of the cover plate 19 is hinged to one side of the maintenance access road 18, and the other end of the cover plate 19 is provided with a hook 191. The hook 191 is adapted to the groove of the seat 192 on the other side of the maintenance access road 18. That is, the cover plate 19 has a rotating opening and closing structure. When the cover plate 19 is opened, it is convenient to hoist the maintenance platform of the present invention onto the main cable 6. After the support clamping mechanism 5 fixes the maintenance platform onto the main cable 6, the cover plate 19 can be closed to prevent objects from falling under the main cable 6 during maintenance personnel's work.

[0046] As attached Figure 26 As shown, when the span of the maintenance operation is small, guide rails 12 and slide rails 13 and the middle truss frame 14 are installed from top to bottom between the outer front gantry 10 and the outer rear gantry 11; the inner gantry 2 is slidably installed on the guide rails 12 and slide rails 13 between the outer front gantry 10 and the middle gantry 3; the characteristic is that the assembled maintenance platform is hoisted on the main cable 6, and the traveling wheels 44 of the front guide wheel device 4 are set on the upper surface of the main cable 6.

[0047] As attached Figure 27As shown, when the span of the maintenance operation increases, in order to avoid the cumbersome process of reassembling and re-hoisting under the cable, support plates 16 and lower support plates 17 can be installed on the outer sides of the outer front gantry 10 and the outer rear gantry 11 to connect the two sets of platforms of the present invention, namely the front maintenance platform 100 and the rear maintenance platform 200. The upper support plates 16 and lower support plates 17 at the beginning and end of the front maintenance platform 100 and the rear maintenance platform 200 are fixedly connected by bolts. When splicing, the front guide wheel device 4 on the connecting side needs to be removed as needed. The assembled front and rear maintenance platforms 100 and 200 are hoisted on the main cable 3, and the traveling wheels 44 of the front guide wheel device 4 are set on the upper surface of the main cable 3.

[0048] This invention's maintenance platform employs a gear and rack meshing transmission, which not only effectively transmits mechanical torque and improves the overall structure's climbing ability, but also effectively records the number of gear rotations and the distance traveled. This allows for precise recording of the starting and ending points of the clamping system each time, laying the foundation for automated movement of the maintenance platform. Internal force sensors installed at the upper and lower connections of the diagonal braces in the inner gantry's triangular frame can collect real-time data on the internal forces of the diagonal braces, dynamically assessing the load-bearing status of the inner gantry and the safety performance of the entire machine during movement. When the monitored value exceeds a preset safety threshold, the system will issue tiered alarms, up to and including a shutdown protection mechanism, thus proactively controlling the risks of heavy-load operations. All rolling support wheel sets are embedded within the platform's main structure, forming an indirect force-bearing system of "support clamping - guide rail transmission," completely eliminating direct contact between the wheels and the main cable surface. This structurally avoids the risk of damage to the main cable's protective layer caused by sliding friction, significantly improving the platform's low-damage operation performance and providing effective assurance for the long-term service safety of the main cable. In high-altitude cable maintenance operations, the maintenance platform of this invention can control the clamping position of the inner gantry on the main cable through the traveling component, adapt to changes in external load in real time, automatically adjust the stress distribution inside the platform, realize stress adaptive control, and ensure that the stress of key components is always maintained within the safety threshold, significantly improving the safety of high-altitude operations under extreme weather conditions; the safety clamp and buffer rod provide safety protection when the platform travels.

[0049] Embodiment 2 of the rapid splicing main cable maintenance platform of the present invention: The difference between this embodiment and Embodiment 1 lies in the structure of the self-locking component when disassembly is not required. Specifically: As attached Figure 7As shown, the self-locking assembly of the present invention includes an annular grooved seat 801 fixedly installed on the inner wall of the square tube B80, a plurality of pressing plates 802 arranged circumferentially and slidably installed on the inner wall of the grooved seat 801, a spring B803 fixedly installed between the bottom wall of the grooved seat 801 and the pressing plates 802, and a limiting steel ball B804 rollingly disposed on the outer wall of the pressing plate 802. A limiting groove is provided on the pressing plate 802 to prevent the limiting steel ball B804 from rolling and shifting. The pressure plate 802 slides radially on the inner wall of the slotted seat 801. The spring B803 is arranged radially to provide a constant radial restoring force. The limiting steel ball B804 abuts radially against the slot of the slotted seat 801 under the elastic force of the spring B803, and the outer diameter of the limiting steel ball B804 is smaller than the inner diameter of the slot of the slotted seat 801. The inner diameter of the middle channel 805 of the slotted seat 801 is larger than the outer diameter of the guide shaft 73, forming a clearance fit to ensure that the guide shaft 73 can be smoothly inserted when it moves.

[0050] As attached Figure 10 As shown, during the assembly of the male and female connectors, first align the male connector's insertion port 71 with the female connector's socket port 81, ensuring the guide shaft 73 is aligned with the central axis of the slotted seat 801. Then, smoothly push the male connector so that the insertion port 71 gradually inserts into the socket port 81. After the guide shaft 73 enters the slotted area of ​​the slotted seat 801, its outer wall begins to contact and compress the limiting steel ball B804. Under pressure, the limiting steel ball B804 presses inward against the pressing plate 802. The pressing plate 802 overcomes the elastic force of the spring B803 and retracts radially along the inner wall of the slotted seat 801. When the guide shaft 73... When the annular groove 74 on the shaft 73 moves to the position of the limiting steel ball B804, the limiting steel ball B804 loses the pressure of the outer wall of the guide shaft 73 and automatically pops out under the elastic restoring force of the spring B803, and is locked into the annular groove 74, forming a reliable mechanical lock. At this time, the threaded hole A75 of the socket 71 and the threaded hole B82 of the socket 81 are coaxially aligned. To further enhance the reliability of the connection, fastening bolts can be installed in the threaded hole A75 and the threaded hole B82 to achieve secondary locking, thereby achieving a stable lock of the male and female connection components.

[0051] The elastic restoring force of spring B803 allows the limiting steel ball B804 to automatically engage with the annular groove 74, while the radial sliding of the pressing plate 802 ensures a tight fit during locking and avoids the tedious steps of repeated tightening required by traditional bolt connections. This invention features a compact overall structure, with all components working in synergy. It ensures the strength of the gantry or truss joints while significantly shortening assembly time, making it suitable for engineering scenarios requiring rapid on-site assembly and effectively reducing labor costs and construction cycles.

[0052] Example 1 of the self-propelled method for the rapid splicing main cable maintenance platform of the present invention: As attached Figure 25As shown, when the maintenance work span reaches the preset length, the inner gantry 2 is slidably installed between the outer front gantry 10 and the middle gantry 3, and between the middle gantry 3 and the outer rear gantry 11. The maintenance platform is characterized by being hoisted onto the main cable 6, with the traveling wheels 44 of the front guide wheel device 4 mounted on the upper surface of the main cable 6. The self-propelled method employs the following steps: S1. The controller separates the support and clamping mechanisms 5 of the outer gantry 1 and the middle gantry 3 of the maintenance platform from the main cable 6, and the support and clamping mechanisms 5 on the two sets of inner gantry 2 are tightly clamped to the main cable 6, so that the two sets of inner gantry 2 are fixed on the main cable 6. S2. The drive motors 208 of the traveling components 20 of the two sets of inner gantry frames 2 drive the transmission gears 209 to rotate. The transmission gears 209 rotate along the rack 15, causing the outer gantry frame 1 and the middle gantry frame 3 to slide forward relative to the main cable 6. The front guide wheel device 4 ensures that the outer gantry frame 1 automatically corrects its deviation when it travels. When it slides to a specified distance, the outer gantry frame 1 stops. S3. The controller controls the support clamping mechanism 5 on the outer gantry 1 and the middle gantry 3 to clamp with the main cable 6, so that the outer gantry 1 and the middle gantry 3 are fixed on the main cable 6; the controller controls the support clamping mechanism 5 of the two sets of inner gantry 2 to separate from the main cable 6. S4. The drive motor 208 of the traveling components 20 of the two sets of inner gantry frames 2 drives the transmission gear 209 to rotate. The transmission gear 209 rotates along the rack 15, thereby driving the two sets of inner gantry frames 2 to slide forward relative to the main cable 6. When the sliding reaches the specified distance, the two sets of inner gantry frames 2 stop. S5. Control the support clamping mechanism 5 on the two sets of inner gantry 2 to clamp the main cable 6 through the controller, so that the maintenance platform is fixed on the main cable 6 as a whole. S6. Repeat S1-S5, the support and clamping mechanisms 5 on the outer gantry 1, inner gantry 2 and middle gantry 3 of the maintenance platform open and close alternately, so that the maintenance platform can move creakingly on the main cable 6.

[0053] This embodiment utilizes modular splicing to achieve free adjustment of the maintenance span: a single configuration can meet routine maintenance needs, while multiple expansions can cover large-span specialized operations, effectively avoiding resource idleness caused by equipment with limited functionality and significantly reducing the total lifecycle maintenance cost. Regarding the travel mechanism, the platform's creeping movement is achieved through the synchronous alternating opening and closing of the support and clamping mechanisms 5 on the outer gantry 1, inner gantry 2, and middle gantry 3. This mechanism ensures that at least two sets of support and clamping mechanisms reliably clamp the main cable during the maintenance platform's movement, greatly improving the stability and wind load resistance of high-altitude long-span operations. In terms of structural safety, the drive motor 208 dynamically adjusts the clamping position of the inner gantry 2, adapting to changes in external loads in real time and dynamically controlling the internal stress distribution of the maintenance platform. This achieves adaptive stress control of the frame, ensuring that the stress of key structural components remains within preset safety limits, thereby significantly improving the safety of operations under extreme weather conditions. This method deeply integrates modular splicing with unified travel control, which can be widely adapted to diverse main cable maintenance scenarios, significantly expanding the equipment's operational coverage and scenario adaptability.

[0054] Example 2 of the self-propelled method for the rapid splicing main cable maintenance platform of the present invention: As attached Figure 28 As shown, the self-advancing method for the span maintenance platform for short operations (i.e., when the span of the maintenance operation is less than 13.5m) adopts the following steps: S1. The controller separates the support clamping mechanism 5 on the outer gantry 1 of the maintenance platform from the main cable 6, and the support clamping mechanism 5 on the inner gantry 2 hugs the main cable 6, so that the inner gantry 2 is fixed on the main cable 6. S2, the drive motor 208 of the inner gantry 2's traveling component 20 drives the transmission gear 209 to rotate. The transmission gear 209 rotates along the rack 15, thereby driving the outer gantry 1 to slide forward relative to the main cable 6. The front guide wheel device 4 ensures that the outer gantry 1 automatically corrects its course when it travels. When it slides to a specified distance, the outer gantry 1 stops. S3. The controller controls the support clamping mechanism 5 on the outer gantry 1 to clamp with the main cable 6, so that the outer gantry 1 is fixed on the main cable 6; the controller controls the support clamping mechanism 5 of the inner gantry 2 to separate from the main cable 6. S4. The drive motor 208 of the traveling component 20 of the inner gantry 2 drives the transmission gear 209 to rotate. The transmission gear 209 rotates along the rack 15, thereby driving the inner gantry 2 to slide forward relative to the main cable 6. When it slides to a specified distance, the inner gantry 2 stops. S5. Control the support clamping mechanism 5 on the inner gantry 2 to clamp the main cable 6 through the controller, so that the maintenance platform is fixed on the main cable 6 as a whole. S6. Repeat S1-S5, the alternating opening and closing of the support and clamping mechanisms 5 on the outer gantry 1 and the inner gantry 2 causes the maintenance platform to creep along the main cable 6.

[0055] This embodiment utilizes the alternating opening and closing of support and clamping mechanisms 5 on the outer gantry 1 and inner gantry 2 to achieve a creeping movement, ensuring that a set of support and clamping mechanisms 5 reliably clamps the main cable throughout the maintenance platform's movement, effectively improving the stability of high-altitude operations. Simultaneously, the drive motor 208 controls the clamping position of the inner gantry 2 on the main cable 6, adapting to changes in external load in real time and dynamically adjusting the internal stress distribution of the maintenance platform. This achieves adaptive stress control of the frame, ensuring that the stress of key structural components remains within preset safety limits, thereby significantly improving the safety of high-altitude operations. This method is convenient to operate, highly efficient, dynamically adapts to changes in external load, and adjusts the internal stress of the platform, ensuring the safe use of components, improving the safety of operations in extreme weather, and avoiding damage to the protective layer of the main cable 6 throughout the process, achieving low-damage operation of the main cable.

Claims

1. A rapid-assembly main cable maintenance platform, characterized in that, It includes an outer gantry (1), a middle gantry (3), an inner gantry (2), and male and female connectors; the outer gantry (1) includes an outer front gantry (10) and an outer rear gantry (11) with the same structure; guide rails (12), slide rails (13) and a middle truss frame (14) are installed from top to bottom between the outer front gantry (10) and the middle gantry (3), and between the middle gantry (3) and the outer rear gantry (11); the inner gantry (2) is slidably installed on the guide rails (12) and slide rails (13); the male and female connectors are installed at the splicing points on the outer sides of the outer gantry (1), the middle gantry (3) and the middle truss frame (14).

2. The rapid splicing main cable maintenance platform according to claim 1, characterized in that, The male connector assembly includes a square tube A (70), a socket (71) fixedly installed at one end of the square tube A (70), a base plate (72) fixedly installed at the end of the socket (71), and a guide shaft (73) fixedly installed in the middle of the base plate (72); an annular groove (74) is provided on the guide shaft (73); a threaded hole A (75) is provided through the top wall of the socket (71); The other end of the square tube A (70) is fixedly installed on the lower part of the outer column of the outer gantry (1), middle gantry (3) or middle truss frame (14).

3. The rapid splicing main cable maintenance platform according to claim 2, characterized in that, The female connector assembly includes a square tube B (80), a socket (81) installed at one end of the square tube B (80) and inserted into the socket (71), and a self-locking assembly installed inside the square tube B (80) and locked to the guide shaft (73); a threaded hole B (82) corresponding to the threaded hole A (75) is provided on the top wall of the socket (81). The other end of the square tube B (80) is fixedly installed on the lower part of the outer column on the other side of the outer gantry (1), middle gantry (3) or middle truss frame (14), and the square tube B (80) and the square tube A (70) are arranged symmetrically.

4. The rapid splicing main cable maintenance platform according to claim 3, characterized in that, The self-locking assembly includes a pressure-resistant seat (83), a movable card seat (84), a limiting steel ball A (85), a movable base (87), a spring A (88), and a drive assembly; The pressure-resistant seat (83) is fixedly installed on the inner wall of the square tube B (80). The inner cavity of the right end of the pressure-resistant seat (83) is provided with a truncated cone limiting cavity (831). The movable card seat (84) is slidably disposed in the truncated cone limiting cavity (831). The left end of the movable card seat (84) is provided with a spring fixing chamber (841), and the right end is provided with a clamping device mounting chamber (842) that matches the shape of the truncated cone limiting cavity (831). The right end of the clamping device mounting chamber (842) abuts against the end of the truncated cone limiting cavity (831). The outer wall of the clamping device mounting chamber (842) is provided with three limiting holes (843) spaced circumferentially. The limiting steel ball A (85) is correspondingly embedded in each limiting hole (843), and the outer diameter of the limiting steel ball A (85) is larger than the inner diameter of the limiting hole (843). The outer wall of the right end of the cone limiting cavity (831), the left side wall and the middle of the right side wall of the clamping device mounting chamber (842) are all provided with guide holes (86) for the guide shaft rod (73) to pass through the gap. The movable base (87) is slidably disposed in the inner cavity on the left side of the pressure-resistant seat (83), and the spring A (88) is fixedly installed in the middle between the movable base (87) and the spring fixing chamber (841). The spring A (88) is coaxial with the guide hole (86). The drive assembly includes a support plate (89) fixedly installed in the left inner cavity of the square tube B (80) corresponding to the left end of the pressure seat (83), a bevel gear A (90) rotatably installed on the right side wall of the support plate (89), a bevel gear B (91) rotatably installed on the inner top wall of the square tube B (80) meshing with the bevel gear A (90), and a screw (92) screwed to the bevel gear A (90). A bearing seat (94) is installed in the middle of the left side of the movable base (87). One end of the screw (92) is rolled in the bearing seat (94), and the other end of the screw (92) passes through the middle of the support plate (89). The screw (92) is coaxial with the guide hole (86) and passes through the inner top wall of the square tube B (80) to install a positioning bolt (93) on the top of the bevel gear B (91). The bevel gear B (91) and the positioning bolt (93) are coaxial. Rotate bevel gear B (91) by positioning bolt (93), drive bevel gear A (90) to rotate, drive screw (92) to move left and right, adjust the position of movable base (87), thereby dynamically adjusting the tightness of spring A (88).

5. The rapid splicing main cable maintenance platform according to claim 3, characterized in that, The self-locking assembly includes an annular groove seat (801) fixedly installed on the inner wall of the square tube B (80), a plurality of pressing plates (802) spaced circumferentially and slidably installed on the inner wall of the groove seat (801), a spring B (803) fixedly installed between the bottom wall of the groove seat (801) and the pressing plates (802), and a limiting steel ball B (804) rolling on the outer wall of the pressing plate (802). The pressing plate (802) is provided with a limiting groove to prevent limiting. The positioning steel ball B (804) rolls and shifts; the pressing plate (802) slides radially on the inner wall of the slotted seat (801), the spring B (803) is set radially, and the limiting steel ball B (804) abuts radially at the slot opening of the slotted seat (801) under the elastic force of the spring B (803), and the outer diameter of the limiting steel ball B (804) is smaller than the inner diameter of the slot opening of the slotted seat (801); the inner diameter of the middle channel (805) of the slotted seat (801) is larger than the outer diameter of the guide shaft rod (73).

6. The rapid splicing main cable maintenance platform according to claim 1, characterized in that, Traveling components (20) and safety components are installed at the top two ends and the outer side of the inner gantry (2). Internal force sensors (22) and rolling support components (21) are installed inside and at the bottom of the inner gantry (2). Support clamping mechanisms (5) adapted to the main cable (6) are installed in the outer gantry (1), the middle gantry (3) and the inner gantry (2). Damping components are installed on the support clamping mechanisms (5). The support clamping mechanisms (5) are electrically connected to the controller. A front guide wheel device (4) adapted to the main cable (6) is installed in the outer gantry (1). The traveling components (20) drive the inner gantry (2) to move on the outer gantry (1). The support and clamping mechanism (5) is installed in the outer front gantry (10), outer rear gantry (11), middle gantry (3) and inner gantry (2); The inner gantry (2) includes two side frames (201) parallel to the guide rail (12), two horizontal beams (202) perpendicular to the guide rail (12), and four vertical supports (203) perpendicular to the guide rail (12); the side frames (201), horizontal beams (202), and supports (203) are all hollow square tubes; the two ends of each side frame (201) and each horizontal beam (202) are fixedly installed between the tops of two corresponding supports (203), and the two side frames (201) and two horizontal beams (202) are... 02) and the top of the four pillars (203) form a square frame; guide holes A (204) communicating with the inner cavity of the frame (201) are provided on the outer wall of the top of the four pillars (203); the rolling support assembly (21) is installed at the bottom of each pillar (203); the traveling assembly (20) includes a rotating shaft (205) rotatably installed in the top port of the pillar (203), pulleys (206) installed at both ends of the rotating shaft (205), and a fixedly installed on the inner side of the two guide rails (12). The system includes a rack (15), motor supports (207) fixedly mounted on the outer sides of both ends of a crossbeam (202), a drive motor (208) vertically mounted on the motor supports (207), and a transmission gear (209) mounted on the drive shaft of the drive motor (208) that meshes with the rack (15). Two pulleys (206) are symmetrically arranged and rotate along the top surfaces of both sides of the guide rail (12). The gap between the guide rail (12) and the rack (15) on it passes through the guide hole A (204). The inner cavity of the frame (201); reinforcement rods (121) are fixedly installed at intervals between the top of the outer front gantry (10) and the middle gantry (3), and between the top of the middle gantry (3) and the outer rear gantry (11), or: reinforcement rods (121) are fixedly installed at intervals between the top of the outer front gantry (10) and the outer rear gantry (11), the two reinforcement rods (121) are located between the two guide rails (12), and guide holes B (122) are provided on the two crossbeams (202) to allow the reinforcement rods (121) to pass through the gap; The rolling support assembly (21) includes support plates (210) fixedly installed on both sides of the bottom end of the support column (203), two sliding wheels A (211) rotatably installed on the upper inner side of each support plate (210), and three sliding wheels B (212) rotatably installed on the lower inner side of each support plate (210). Both sets of sliding wheels A (211) are located below the bottom surface of the support column (203). The sliding wheels A (211) of the two support plates (210) are symmetrically arranged, and the two sets of sliding wheels A (211) are located on the upper surface of the slide rail (13). The sliding wheels B (212) of the two support plates (210) are symmetrically arranged, and the two sets of sliding wheels B (212) are located on the lower surface of the slide rail (13).

7. The rapid splicing main cable maintenance platform according to claim 6, characterized in that, The support clamping mechanism (5) includes a main support mechanism (51) that contacts or separates from the upper surface of the main cable (6) and lateral clamping mechanisms (52) symmetrically arranged on both sides of the main cable (6); the two sets of lateral clamping mechanisms (52) are symmetrically arranged about the main cable (6); the main support mechanism (51) includes a vertically arranged main hydraulic cylinder (511) and an elevation hydraulic cylinder B (512), the top of the cylinder bodies of the main hydraulic cylinder (511) and the elevation hydraulic cylinder B (512) are fixedly connected to the top crossbeam of the outer gantry (1) or the inner gantry (2), and a universal ball (513) is installed at the bottom end of the rod end of the elevation hydraulic cylinder B (512). A support base (514) is installed at the bottom of the ball (513) and the bottom rod end of the main hydraulic cylinder (511). The bottom surface of the support base (514) is provided with an arc-shaped support plate (515) that matches the shape of the upper surface of the main cable (6). The damping assembly includes a spring damper A (516) and a spring damper B (517) hinged on both sides of the cylinder body of the main hydraulic cylinder (511). The spring damper A (516) and the spring damper B (517) are obliquely symmetrically arranged with the main hydraulic cylinder (511) as the axis. The top ends of the spring damper A (516) and the spring damper B (517) are hinged to the top crossbeam of the outer gantry (1) or the inner gantry (2). The lateral clamping mechanism (52) includes an elastic buffer support assembly installed on the inner side of the column or support column (203) of the outer gantry (1), a fixed seat (521) fixedly installed in the elastic buffer support assembly, a lateral hydraulic cylinder (522) rotatably installed on the fixed seat (521), a leg retraction mechanism installed on one side of the cylinder body of the lateral hydraulic cylinder (522), and a clamping seat (523) fixedly installed on the rod end of the lateral hydraulic cylinder (522) and corresponding to the side of the main cable (6). 23) An arc-shaped pad (534) corresponding to the side of the main cable (6) is provided on the outside; a horizontal support rod (26) parallel to the frame (201) is fixedly installed between the lower parts of the two pillars (203) adjacent to the elastic buffer support assembly; a leg-retracting mechanism is obliquely installed between the horizontal support rod (26) and the cylinder body of the lateral hydraulic cylinder (522); the elastic buffer support assembly includes a U-shaped spring seat (524) fixedly installed on the inner side of the column or pillar (203) of the outer gantry (1), and a U-shaped spring seat (534) provided on the U-shaped spring seat (534). 24) The U-shaped buffer seat (525), the side support plate (526) fixedly installed on the inner side of the top of the U-shaped spring seat (524), the buffer plate (527) fixedly installed on the outer side of the top of the U-shaped buffer seat (525) corresponding to the side support plate (526), ​​the guide rod (528) fixedly installed between the side support plate (526) and the bottom plate of the U-shaped spring seat (524), and the spring (529) fitted on the outer side of the guide rod (528), the U-shaped spring seat (524) and the U-shaped buffer seat (525) All of them open towards the main cable (6), and the two guide rods (528) are symmetrically arranged. Each guide rod (528) passes through the corresponding buffer plate (527) with a gap. The spring (529) is installed between the buffer plate (527) and the bottom plate of the U-shaped spring seat (524). The fixed seat (521) is installed in the U-shaped buffer seat (525). The cylinder end of the lateral hydraulic cylinder (522) is hinged to the fixed seat (521) through a rotating shaft, so that the leg retraction mechanism drives the lateral hydraulic cylinder (522) to rotate laterally. The retracting mechanism includes an L-shaped support rod (530) fixedly installed inside the horizontal support rod (26), an upper resistance rod (531) hinged to the other end of the L-shaped support rod (530), a lower resistance rod (532) hinged to the other end of the upper resistance rod (531), and a retraction cylinder (533); the other end of the lower resistance rod (532) is hinged to the outer wall of the cylinder body of the lateral hydraulic cylinder (522), the cylinder body end of the retraction cylinder (533) is hinged to the inside of the horizontal support rod (26), the rod end of the retraction cylinder (533) is hinged to the lug at the other end of the upper resistance rod (531), and the retraction cylinder (533) is located below the upper resistance rod (531).

8. The rapid splicing main cable maintenance platform according to claim 6, characterized in that, The safety components include buffer rods (23) spaced apart on one side beam (202) and safety clamps (24) spaced apart on the other side beam (202). Rubber blocks are installed at the ends of the buffer rods (23). The buffer rods (23) correspond to the upper frame of the outer front mast (10). The safety clamps (24) clamp or release the corresponding reinforcing rods (121). The safety clamps (24) are electrically connected to the controller. Diagonal bracing rods (25) are fixedly installed between the two pillars (203) on both sides of the inner gantry (2). The diagonal bracing rods (25) are located above the horizontal bracing rods (26). The internal force sensors (22) are installed on the inner sides of both ends of the diagonal bracing rods (25). The front guide wheel device (4) includes a vertically arranged support hydraulic cylinder (411), an elevation hydraulic cylinder A (412), a guide wheel frame (43), a walking wheel (44) symmetrically rotated and installed at the bottom of the guide wheel frame (43), and a buffer assembly connected to the walking wheel (44). The tops of the support hydraulic cylinder (411) and the elevation hydraulic cylinder A (412) are fixedly connected to the top crossbeam of the outer front mast (10) or the outer rear mast (11). The bottom rod end of the elevation hydraulic cylinder A (412) is equipped with a ball joint (42). The bottom of the ball joint (42) and the bottom rod end of the support hydraulic cylinder (411) are both installed on the top surface of the guide wheel frame (43). The bottom of the ball joint (42) is located in the middle of the top surface of the guide wheel frame (43).

9. A self-propelled method for a rapidly assembled main cable maintenance platform, employing the rapidly assembled main cable maintenance platform as described in any one of claims 1-8, wherein when the maintenance work span reaches a preset length, an inner gantry (2) is slidably installed between the outer front gantry (10) and the middle gantry (3), and between the middle gantry (3) and the outer rear gantry (11), characterized in that, The maintenance platform is hoisted onto the main cable (6), and the traveling wheels (44) of the front guide wheel device (4) are set on the upper surface of the main cable (6). The self-propelled method adopts the following steps: S1. The controller separates the support clamping mechanism (5) of the outer gantry (1) and middle gantry (3) of the maintenance platform from the main cable (6), and the support clamping mechanism (5) on the two sets of inner gantry (2) hugs the main cable (6) so that the two sets of inner gantry (2) are fixed on the main cable (6). S2. The drive motor (208) of the travel assembly (20) of the two sets of inner gantry frames (2) drives the transmission gear (209) to rotate. The transmission gear (209) rotates along the rack (15), driving the outer gantry frame (1) and the middle gantry frame (3) to slide forward relative to the main cable (6). The front guide wheel device (4) ensures that the outer gantry frame (1) automatically corrects its deviation when it travels. When it slides to a specified distance, the outer gantry frame (1) stops. S3. The controller controls the support clamping mechanism (5) on the outer gantry (1) and the middle gantry (3) to clamp with the main cable (6), so that the outer gantry (1) and the middle gantry (3) are fixed on the main cable (6); the controller controls the support clamping mechanism (5) of the two sets of inner gantry (2) to separate from the main cable (6); S4. The drive motor (208) of the traveling component (20) of the two sets of inner gantry frames (2) drives the transmission gear (209) to rotate. The transmission gear (209) rotates along the rack (15), thereby driving the two sets of inner gantry frames (2) to slide forward relative to the main cable (6). When the sliding reaches the specified distance, the two sets of inner gantry frames (2) stop. S5. By controlling the controller, the support clamping mechanism (5) on the two sets of inner gantry frames (2) is tightened with the main cable (6) so that the maintenance platform is fixed on the main cable (6) as a whole. S6. Repeat S1-S5, the support clamping mechanism (5) on the outer gantry (1), inner gantry (2) and middle gantry (3) of the maintenance platform opens and closes alternately, so that the maintenance platform can move along the main cable (6).

10. A self-propelled method for a rapid splicing main cable maintenance platform, employing the rapid splicing main cable maintenance platform as described in any one of claims 1-8, wherein when the maintenance work span is less than 13.5m, guide rails (12) and slide rails (13) and a middle truss frame (14) are installed from top to bottom between the outer front gantry (10) and the outer rear gantry (11); the inner gantry (2) is slidably installed on the guide rails (12) and slide rails (13) between the outer front gantry (10) and the outer rear gantry (11); characterized in that, The assembled maintenance platform is hoisted onto the main cable (6), and the traveling wheels (44) of the front guide wheel device (4) are set on the upper surface of the main cable (6); The self-entry method for short-span maintenance platforms adopts the following steps: S1. The controller separates the support clamping mechanism (5) on the outer gantry (1) of the maintenance platform from the main cable (6), and the support clamping mechanism (5) on the inner gantry (2) hugs the main cable (6) so that the inner gantry (2) is fixed on the main cable (6). S2. The drive motor (208) of the travel assembly (20) of the inner gantry (2) drives the transmission gear (209) to rotate. The transmission gear (209) rotates along the rack (15), thereby driving the outer gantry (1) to slide forward relative to the main cable (6). The front guide wheel device (4) ensures that the outer gantry (1) automatically corrects its course when it travels. When it slides to a specified distance, the outer gantry (1) stops. S3. The controller controls the support clamping mechanism (5) on the outer gantry (1) to clamp with the main cable (6), so that the outer gantry (1) is fixed on the main cable (6); the controller controls the support clamping mechanism (5) of the inner gantry (2) to separate from the main cable (6); S4. The drive motor (208) of the travel assembly (20) of the inner gantry (2) drives the transmission gear (209) to rotate. The transmission gear (209) rotates along the rack (15), thereby driving the inner gantry (2) to slide forward relative to the main cable (6). When it slides to a specified distance, the inner gantry (2) stops. S5. By controlling the controller, the support clamping mechanism (5) on the inner gantry (2) is tightened with the main cable (6) so that the maintenance platform is fixed on the main cable (6). S6. Repeat S1-S5, alternating opening and closing of the support clamping mechanism (5) on the outer gantry (1) and inner gantry (2) to make the maintenance platform creep along the main cable (6).

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