Main cable maintenance platform traction winding device and winding method

Abstract

The invention relates to a main cable maintenance platform traction winding device and a winding method. A main cable maintenance platform comprises an outer portal frame and an inner portal frame which are connected in a sleeved mode and can slide relatively. The traction winding device comprises traction connecting assemblies A installed on the left side and the right side of the outer front door frame, traction connecting assemblies B installed on the left side and the right side of the inner front door frame and a traction mechanism connected with the traction connecting assemblies A and the traction connecting assemblies B in a winding mode. Winding steel wire ropes of the winches A and B; a hook pulley and a rolling pulley in the traction winding device are correspondingly mounted on frames on the two sides of the front ends of the inner front door frame and the outer front door frame respectively and are easy to dismount or mount, so that an operator can conveniently inspect the traction device, replace parts and the like in the daily maintenance and repair process; compared with a complex traditional traction system, the traction winding device has the advantages that the maintenance time can be greatly shortened, and the utilization rate of equipment is increased.

Description

Technical Field

[0001] The invention relates to a traction and winding device and a winding method for a main cable maintenance platform, belonging to the technical field of main cable detection and maintenance of suspension bridges. Background Art

[0002] The main cable maintenance platforms for suspension bridges in my country have various structural forms, which can be roughly divided into traction-type maintenance platforms and self-propelled maintenance platforms according to the walking mode. Among them, since the traction-type maintenance platform abandons the complex and heavy travel mechanism and has a lighter weight, it causes less damage to the main cable protective layer when traveling, so traction-type main cable maintenance platforms are often used at home and abroad.

[0003] However, the existing large-scale maintenance vehicles or maintenance platforms are limited by the structural form of the maintenance platform, resulting in a single traction method. It is often necessary to use a high-power winch, a thicker wire rope, etc. to ensure the climbing ability of the maintenance platform ( / maintenance vehicle), which easily leads to a waste of resources.

[0004] Chinese Invention 202010209705X discloses a main cable maintenance platform for a suspension bridge, comprising a platform frame arranged outside the main cable, a traveling device installed on the platform frame, a traction device driving the traveling device to move along the main cable, and a supporting and clamping device, wherein the supporting and clamping device comprises a main supporting mechanism and two lateral clamping mechanisms, one end of the main supporting mechanism is connected to the platform frame, and the other end of the main supporting mechanism contacts or separates from the upper surface of the main cable; one end of the two lateral clamping mechanisms is respectively connected to the platform frame, and the other end contacts or separates from the left and right side surfaces of the main cable respectively; in the actual traction travel of the above scheme, the supporting and clamping device will be completely separated from the main cable, and the friction force generated on the main cable when the maintenance platform is moving cannot be controlled, thereby causing the walking device to damage the outer protective layer of the main cable when moving; at the same time, in this traction mode, the required traction force is the dead weight of the platform, and the actual traveling ability of the maintenance platform depends entirely on the power of the selected winch, which will cause energy waste.

[0005] Chinese Invention 2023100200026 discloses a crawling construction platform for the main cable of a suspension bridge and a travel control method thereof, which mainly adopts a traction part located on the platform body for traction and travel. One end of the steel cable is fixed to the steel cable anchor, and the other end is the traction end. The steel cable passes around the movable pulley, the steering pulley and the fixed pulley in sequence to realize the traction of the construction platform; but due to the limitations of the temporary clamp and the platform body, and the movable pulleys are arranged in sequence in a vertical traction direction, only traction forces of 1 / 4 and 1 / 8 of the platform's own weight can be achieved. These two winding methods cannot dynamically adjust the required traction force according to actual needs, which is easy to cause energy waste; at the same time, as the design length of the construction platform increases, the required traction force will also increase accordingly. Summary of the invention

[0006] In view of the above problems, the technical problem to be solved by the present invention is to provide a main cable maintenance platform traction and winding device and winding method that travels losslessly, saves energy and does not increase the required traction force with the length of the maintenance platform.

[0007] The technical solution adopted by the present invention is as follows:

[0008] The main cable maintenance platform traction and winding device of the present invention comprises an outer gantry and an inner gantry which are socketed and can slide relative to each other; the traction and winding device comprises a traction connection component A installed on the left and right sides of the outer front gantry, a traction connection component B installed on the left and right sides of the inner front gantry, and a traction mechanism wound and connected with the traction connection component A and the traction connection component B.

[0009] The main cable maintenance platform traction winding method of the present invention, the wire rope winding method of the winch A is as follows: the movable end of the wire rope of the winch A is wound around the rolling pulley, the fixed pulley and the hook pulley in sequence, and then connected to the hook A after being clamped by one or more limit gear sets; the traction force required by each winch A is 1 / 8 of the deadweight of the maintenance platform;

[0010] Or: a fixed pulley A is installed on the top of the fixed pulley, and the top of the fixed pulley A is fixed to the outer wall of the main tower; the movable end of the wire rope of the winch A is wound around the rolling pulley, the fixed pulley A, the hook pulley and the fixed pulley in sequence, and then connected to the hook B of the hook pulley after being clamped by one or more limit gear sets. The traction force required for each winch A is 1 / 10 of the weight of the maintenance platform.

[0011] The traction winding method of the main cable maintenance platform and the wire rope winding method of winch B are as follows:

[0012] A fixed pulley A is installed on the top of the fixed pulley, and the top of the fixed pulley A is fixed to the outer wall of the main tower; the movable end of the wire rope of the winch B is clamped by one or more limit gear sets, and then wound around the fixed pulley A, the hook pulley and the fixed pulley in sequence, and then clamped by one or more limit gear sets and connected to the hook B of the hook pulley; the traction force required for each winch B is 1 / 6 of the deadweight of the maintenance platform;

[0013] Or: the movable end of the wire rope of the winch B is clamped by one or more limit gear sets, and then wound around the fixed pulley A, the rolling pulley, the fixed pulley and the hook pulley in sequence, and then connected to the hook A after being clamped by one or more limit gear sets; the traction force required for each winch B is 1 / 8 of the deadweight of the maintenance platform;

[0014] Or: fixed pulley A is installed on the top of the fixed pulley, and fixed pulley B is installed on the top of the fixed pulley A, and the top of the fixed pulley B is fixed to the outer wall of the main tower; the movable end of the wire rope of the winch B is clamped by one or more limit gear groups, and then is wound around the fixed pulley B, the rolling pulley, the fixed pulley A, the hook pulley and the fixed pulley in sequence, and then is clamped by one or more limit gear groups and connected to the hook B of the hook pulley; the traction force required for each winch B is 1 / 10 of the weight of the maintenance platform.

[0015] The positive effects of the present invention are as follows: (1) The movable and fixed pulleys of the maintenance platform of the present invention are arranged in sequence along the traction direction, which can not only greatly reduce the required traction force by mutual conversion of the movable and fixed pulleys; at the same time, with the increase in the number of splicing of the maintenance platform, not only can the main cable maintenance length be extended, but also the required traction force can be further reduced, thereby greatly enhancing the adaptability of the maintenance platform under different working conditions, so that it can better meet the diversified maintenance needs. (2) The hook pulley and the rolling pulley in the traction winding device of the present invention are respectively installed on the two side frames of the front end of the inner and outer front door frames, which are easy to disassemble or install, so that during daily maintenance and repair, the operator can conveniently inspect and replace parts of the traction device of the present invention. Compared with the complex traditional traction system, the traction winding device of the present invention can greatly shorten the maintenance time and improve the utilization rate of the equipment. (3) The traction winding device of the present invention installs the winch A on the main tower, which can reduce the influence of the main cable vibration, wind load and other factors on the traction work during the traction process by means of the stable structure of the main tower and the limitation of the limit gear, thereby better ensuring the stability of the traction and ensuring the safe operation of the maintenance platform. In some construction sites with limited space, the traction winding device of the present invention can also install the winch B on both sides of the top of the outer front door frame for traction operations, which not only reduces the restrictions on the construction site, but also simplifies the installation process of the entire maintenance platform; at the same time, during the traction operation, the angle of the traction wire rope can be adjusted according to actual needs, so as to more conveniently adjust the posture of the platform so that the platform can accurately dock at the required position. (4) The traction winding method of the present invention can dynamically adjust the traction force according to the changes in the weight of the equipment and personnel on the platform; whether it is empty, lightly loaded or fully loaded, the traction system can ensure that the platform operates with the best performance; when the load increases, the fixed pulley can be increased to ensure the normal driving speed and stability of the platform; and when the load decreases, the fixed pulley can be reduced accordingly to avoid the traction wire rope being too long and the waste of traction energy; this adaptive load adjustment capability allows the maintenance platform to be flexibly used under various working conditions, thereby greatly improving its versatility and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 This is a schematic diagram of the maintenance platform structure; Figure 2This is a schematic diagram of the external gantry structure of the maintenance platform; Figure 3 This is a schematic diagram of the gantry structure in the maintenance platform; Figure 4 This is a schematic diagram of the front view structure of the gantry in the maintenance platform; Figure 5 Schematic diagram of the structure of the winch A of the present invention installed on the main tower; Figure 6 Schematic diagram of the structure of the winch B of the present invention installed on the outer front door frame; Figure 7 Schematic diagram of the shaft side structure of the front guide wheel device; Figure 8 This is a schematic diagram of the front guide wheel device; Fig. 9 It is a schematic diagram of the front guide wheel device from the side; Fig.10 Schematic diagram of the contact structure between the front guide wheel device and the main cable knot; Fig.11 This is a schematic diagram of the main support structure of the maintenance platform; Fig.12 This is a schematic diagram of the main support structure of the maintenance platform; Fig.13 Schematic diagram of the structure of the torsion self-adjusting device; Fig.14 Schematic diagram of the axial structure of the lateral hydraulic cylinder; Fig.15 This is a schematic diagram of the structure of the upper and lower splicing plates on the maintenance platform; Fig.16 This is the schematic diagram of the installation structure of the maintenance platform cover; Fig.17 Schematic diagram of the structure of the two limit gears of the present invention contacting the wire rope respectively; Fig.18 Schematic diagram of the coaxial fixed pulley structure of the present invention; Fig.19 FIG. 1 is a structural schematic diagram of a wire rope winding embodiment 1 of a hoist A of the present invention; Fig. 20 FIG. 1 is a structural schematic diagram of a second embodiment of a wire rope winding of a winch A of the present invention; Fig.21 FIG. 1 is a structural schematic diagram of a wire rope winding embodiment 1 of a hoist B of the present invention; Fig. 22 FIG. 1 is a structural schematic diagram of a second embodiment of a wire rope winding of a winch B of the present invention; Fig.23 FIG. 1 is a structural schematic diagram of a third embodiment of the wire rope winding of a winch B of the present invention; Fig.24 This is a schematic diagram of the axonometric structure of the two maintenance platforms; Fig.25 This is a schematic diagram of the front view structure of the connection between the two maintenance platforms; Fig.26 The following is a schematic diagram of the winding structure of the wire rope of the winch A for the two maintenance platforms; Fig. 27 The following is a schematic diagram of the winding structure of the wire rope of the winch B spliced ​​on the two maintenance platforms; Fig.28 This is a schematic diagram of the structure of two groups of maintenance platforms being connected by an intermediate section frame.

[0017] In the attached drawings: 1 external gantry,

[0018] 10 outer front door frame, 11 outer rear door frame, 12 guide rail A, 13 supporting slide block, 141 limit block A, 142 limit block B, 143 limit block C, 15 upper splicing plate, 16 lower splicing plate, 17 inspection road, 181 tooth mark A, 182 tooth mark B, 19 cover plate, 191 hook, 192 seat;

[0019] 2 inner gantry,

[0020] 20 inner front door frame, 21 inner rear door frame, 22 middle truss frame, 23 guide rail B, 24 guide rail C; 3 main cable;

[0021] 4 front guide wheel device,

[0022] 41 supporting hydraulic cylinder, 42 rotating bearing, 43 guide wheel frame, 44 walking wheel, 431 supporting plate, 432 supporting plate A, 433 supporting plate B, 434 pressure-resistant platform A, 435 pressure-resistant platform B, 436 paddle A, 437 paddle B, 438 pull rod A, 439 buffer rod A, 440 high-pressure spring A, 441 pull rod B, 442 buffer rod B, 443 high-pressure spring B, 444 blocking piece;

[0023] 5 Support clamping mechanism,

[0024] 51 main support mechanism, 511 main hydraulic cylinder, 512 elevation hydraulic cylinder, 513 universal ball, 514 support seat, 515 arc support plate;

[0025] 52 lateral clamping mechanism, 521 fixed seat, 522 lateral hydraulic cylinder, 523 clamping seat, 524 fractal vise, 525 tiger claw, 526 arc groove, 527 rotating shaft, 528 worm gear, 529 driving gear, 530 internal gear, 531 worm, 532 torsion motor;

[0026] 53 reverse support rod;

[0027] 61 main tower, 621 winch A, 622 winch B, 63 wire rope, 64 limiting gear, 65 hook pulley, 651 hook pulley A, 66 rolling pulley, 661 rolling pulley A, 67 fixed pulley, 671 fixed pulley A, 672 fixed pulley B, 673 fixed pulley C, 674 coaxial fixed pulley, 68 hook A, 69 hook B;

[0028] 71 sliding support wheel set A, 72 sliding support wheel set B, 73 sliding support wheel set C, 701 splicing plate, 702 rotating shaft, 703 upper sliding wheel, 704 lower sliding wheel;

[0029] 8 middle section frame. DETAILED DESCRIPTION

[0030] As attached Figure 1-6As shown, the main cable maintenance platform in the traction and winding device of the main cable maintenance platform of the present invention includes an outer gantry 1 and an inner gantry 2 which are connected to each other; the traction and winding device includes a traction connection component A installed on the left and right sides of the outer front gantry 10, a traction connection component B installed on the left and right sides of the inner front gantry 20, and a traction mechanism wound and connected with the traction connection component A and the traction connection component B; the traction connection component A includes a hook pulley 65 installed on the two side frames at the front end of the outer front gantry 10, and a hook B69 is arranged on the hook pulley 65; the traction connection component B includes a rolling pulley 66 installed on the two side frames at the front end of the inner front gantry 20.

[0031] As attached Figure 5 , 6 As shown, the traction mechanism of the present invention includes a winch, one or more limit gear sets installed on the main cable 3 cable clamp, and a fixed pulley 67 installed on the outer wall of the main tower 61 and corresponding to the two sides of the front end of the outer front door frame 10; the winch is installed with a wire rope 63; the winch includes a winch A621 installed on the main tower 61 and corresponding to the two sides of the front end of the outer front door frame 10 or a winch B622 installed on both sides of the top of the outer front door frame 10, and the winch A621 or winch B622 are both two; the fixed pulley 67 is 1-4, and more than two fixed pulleys 67 are connected end to end in sequence; a hook A68 is installed at the bottom of the fixed pulley 67 at the bottom; the wire rope 63 of the winch A621 or winch B622 is connected to the hook pulley 65, the rolling pulley 66 and the fixed pulley 67 corresponding to the hook pulley 65, the rolling pulley 66 and the fixed pulley 67, and then connected to the hook A68 or the hook B69;

[0032] As attached Fig.17 As shown, the limit gear set includes two corresponding limit gears 64 , the steel wire rope 63 passes through the two limit gears 64 , and the two limit gears 64 are in contact with corresponding sides of the steel wire rope 63 respectively.

[0033] As attached Figure 1-4 As shown, the outer gantry 1 includes an outer front gantry 10, an outer rear gantry 11, and a guide rail A12 installed between the top surfaces of the outer front gantry 10 and the outer rear gantry 11; the inner gantry 2 includes an inner front gantry 20, an inner rear gantry 21, and a middle truss frame 22 installed between the lower parts of the inner front gantry 20 and the inner rear gantry 21, a guide rail B23 is installed between the top surfaces of the inner front gantry 20 and the inner rear gantry 21, a guide rail C24 is installed above the middle truss frame 22, and a front guide wheel device 4 adapted to the main cable 3 is correspondingly installed in the outer front gantry 10; a supporting clamping mechanism 5 adapted to the main cable 3 is correspondingly arranged in the outer front gantry 10, the outer rear gantry 11, the inner front gantry 20, and the inner rear gantry 21; the supporting clamping mechanism 5 is connected to the controller by electrical signals;

[0034] A sliding support wheel set A71 cooperating with the guide rail B23 is installed on the bottom surface of the top beam of the outer rear door frame 11, and a sliding support wheel set B72 cooperating with the guide rail A12 is installed on the top surface of the top beam of the inner front door frame 20; a sliding support wheel set C73 cooperating with the guide rail C24 is installed at the bottom of the supporting legs of the outer rear door frame 11; the guide rails A12, B23 and C24 are all I-shaped guide rails; the guide rails A12 are four parallelly arranged, and the guide rails B23 are two parallelly arranged; the inner front door frame 2 0 Support slide blocks 13 are installed at all four corners of the top; the lower flanges of the two outer guide rails A12 are slidably arranged in the support slide blocks 13; limit assemblies are arranged on the guide rails A12, guide rails B23 and guide rails C24; the limit assemblies include limit blocks A141 fixedly installed at both ends of the guide rail A12, limit blocks B142 fixedly installed at both ends of the guide rail B23 and limit blocks C143 fixedly installed at both ends of the guide rail C24; ensure that the outer gantry 1 and the inner gantry 2 slide safely after being connected.

[0035] Four groups of support slide blocks 13 are arranged in parallel on the top of the outer front door frame 10, each group of support slide blocks 13 has three support slide blocks, and each group of support slide blocks 13 is welded to a lower flange of the corresponding parallel guide rail A12 to form a whole, so as to ensure that the outer front door frame 10 and the outer rear door frame 11 can move as a whole.

[0036] As attached Figure 7-9 As shown, the front guide wheel device 4 of the maintenance platform is fixedly installed in the outer front portal frame 10, which includes a guide wheel frame 43, a supporting hydraulic oil cylinder 41 installed in the middle of the top surface of the guide wheel frame 43 through a rotating bearing 42, a running wheel 44 symmetrically rotated and installed at the bottom of the guide wheel frame 43, and a buffer assembly connected to the running wheel 44; the top of the cylinder body of the supporting hydraulic oil cylinder 41 is fixedly connected to the upper beam of the outer front portal frame 10; the extension and shortening of the supporting hydraulic oil cylinder 41 can make the running wheel 44 contact or separate from the upper surface of the main cable 3;

[0037] The guide wheel frame 43 includes a supporting plate 431, a support plate A432 vertically fixedly installed on both sides of one end of the supporting plate 431, a support plate B433 vertically fixedly installed on both sides of the other end of the supporting 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 rotating bearing 42 is installed in the middle of the top surface of the supporting plate 431, so that the walking wheel 44 can rotate on the horizontal plane with the guide wheel frame 43 relative to the supporting hydraulic cylinder 41.

[0038] The buffer assembly includes a paddle A436 hinged on the inner side of each support plate A432, a paddle B437 hinged on the inner side of two support plates B433, a pull rod A438 fixedly installed between one end of the two paddles A436, a plurality of buffer rods A439 with a gap passing through the pressure-resistant platform A434 and the bottom of which is fixedly installed on the pull rod A438, a high-pressure spring A440 sleeved on each buffer rod A439, a pull rod B441 fixedly installed between one end of the two paddles B437, a plurality of buffer rods B442 with a gap passing through the pressure-resistant platform B435 and the bottom of which is fixedly installed on the pull rod B441, and a high-pressure spring B443 sleeved on each buffer rod B442; A blocking piece 444 is fixedly installed on the top of A439 and buffer rod B442; pull rod A438 and pull rod B441 are arranged adjacent to each other, so that pull rod A438 and pull rod B441 correspondingly drive buffer rod A439 and buffer rod B442, and buffer rod A439 and buffer rod B442 correspondingly compress high-pressure spring A440 and high-pressure spring B443, so as to realize slight adjustment of the traveling wheel 44 in the vertical direction, so as to increase the obstacle surmounting ability of the front guide wheel device 4; the two walking wheels 44 are respectively installed between the outer ends of the two paddles A436 and paddle B437; the walking wheel 44 is a concave wheel, so that the walking wheel 44 can be loosely clamped on the main cable 3 when walking, and can roll along the main cable 3.

[0039] As attached Figure 10-15 As shown, the support and clamping mechanism 5 of the maintenance platform is arranged on the rear side of the front guide wheel device 4; the support and clamping mechanism 5 includes a main support mechanism 51 that contacts or separates from the upper surface of the main cable 3 and lateral clamping mechanisms 52 that are symmetrically arranged on both sides of the main cable 3; that is, two groups of lateral clamping mechanisms 52 are arranged, and the two groups of lateral clamping mechanisms 52 are symmetrically arranged with the main cable 3 as the axis; 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 3 respectively, the maintenance platform can be clamped and fixed on the main cable 3; when the main support mechanism 51 and the two lateral clamping mechanisms 52 are separated from the upper surface and the left and right sides of the main cable 3 at the same time, the maintenance platform can move relative to the main cable 3 through the front guide wheel device 4, the traction mechanism and the sliding support wheel group, thereby realizing the maintenance platform to perform cable opening detection at any position of the main cable 3.

[0040] The main support mechanism 51 includes a main hydraulic cylinder 511 and an elevation hydraulic cylinder 512 which are vertically arranged. The tops of the main hydraulic cylinder 511 and the elevation hydraulic cylinder 512 are fixedly connected to the upper cross beams of the outer gantry 1 and the inner gantry 2 respectively. A universal ball 513 is installed at the lower rod end of the elevation hydraulic cylinder 512. A support seat 514 is installed at the bottom of the universal ball 513 and the bottom rod end of the main hydraulic cylinder 511. By changing the different telescopic amounts of the main hydraulic cylinder 511 and the elevation hydraulic cylinder 512, the support seat 514 can adjust its elevation angle along with the main cable 3. At the same time, an arc-shaped support plate 515 matching the shape of the upper surface of the main cable 3 is arranged on the bottom surface of the support seat 514. The arc-shaped support plate 515 can further realize contact or separation with the upper surface of the main cable 3 under the telescopic action of the main hydraulic cylinder 511 and the elevation hydraulic cylinder 512, and can balance the pressure of the main hydraulic cylinder 511 and the elevation hydraulic cylinder 512 on the upper surface of the main cable 3.

[0041] The lateral clamping mechanism 52 includes a fixing seat 521 which is laterally fixed to the columns of the outer gantry 1 and the inner gantry 2, a torsion self-adjusting device installed on the fixing seat 521, a lateral hydraulic cylinder 522 which is laterally installed on the torsion self-adjusting device, and a clamping seat 523 which is fixedly installed at the rod end of the lateral hydraulic cylinder 522 and corresponds to the side of the main cable 3, so that the entire lateral clamping mechanism 52 can be rotated by relying on the torsion self-adjusting device, and then the angle of contact with the side of the main cable 3 can be adjusted according to actual needs to ensure the contact area with the side of the main cable 3; a fractal vise 524 is arranged on the outside of the clamping seat 523, and a plurality of tiger claws 525 corresponding to the side of the main cable 3 are arranged on the outside of the fractal vise 524, which can further realize contact or separation with the side of the main cable 3 with different curvatures under the telescopic action of the lateral hydraulic cylinder 522; the arc-shaped support plate 515 and the tiger claw 525 are made of rubber, which can balance the pressure of the hydraulic mechanism on the top or side of the main cable 3.

[0042] The torsion self-adjusting device includes an arc groove 526 arranged on a fixed seat 521, a rotating shaft 527 rotatably installed in the arc groove 526, a worm gear 528 rotatably installed on the rotating shaft 527, a driving gear 529 fixedly installed on one side of the worm gear 528, an internal gear 530 meshing with the driving gear 529, and a worm 531 mounted on the lateral hydraulic cylinder 522 and meshing with the worm gear 528, wherein the internal gear 530 is fixed to the fixed seat 521, the arc groove 526 is located on the inner ring of the internal gear 530, the rotating shaft 527 is fixed to the cylinder end of the lateral hydraulic cylinder 522; one end of the worm gear 531 is connected to a torsion motor 532 mounted on the lateral hydraulic cylinder 522. The torsion motor 532 drives the worm 531 to drive the worm wheel 528 and the driving gear 529 to rotate. The driving gear 529 rotates along the inner gear 530, thereby driving the lateral hydraulic cylinder 522 to rotate, so that the lateral clamping mechanism 52 rotates counterclockwise or clockwise along the arc groove 526.

[0043] In order to enhance the vertical stiffness of the columns of the outer gantry 1 and the inner gantry 2, a reverse support rod 53 is bolted to the middle of the columns on the left and right sides of the frames of the outer gantry 1 and the inner gantry 2. The reverse support rod 53 is a rigid rod. By setting the reverse support rod 53, a reaction force group can be formed with the two lateral clamping mechanisms 52, so that the maintenance platform can be locked in the vertical direction on the main cable 3.

[0044] As attached Figure 2 , 3 As shown in FIG. 11 , the structures of the sliding support wheel group A71, the sliding support wheel group B72 and the sliding support wheel group C73 of the maintenance platform are the same; the sliding support wheel group A71 and the sliding support wheel group B72 are both four groups, and one group of sliding support wheel group C73 is installed at the bottom of each leg of the outer rear door frame 11, for a total of four groups;

[0045] The sliding support wheel set A71, the sliding support wheel set B72 or the sliding support wheel set C73 comprises two splicing plates 701, two upper sliding wheels 703 installed at the upper part between the two splicing plates 701 through a rotating shaft 702, and a lower sliding wheel 704 rotatably installed at the lower inner part of each splicing plate 701; the two upper sliding wheels 703 are symmetrically arranged, and the two lower sliding wheels 704 are symmetrically arranged;

[0046] The top ends of the two splicing plates 701 of the sliding support wheel group A71 are fixedly installed on the bottom surface of the right top beam of the outer rear door frame 11; the two upper sliding wheels 703 are located on the upper surface of the upper flange of the guide rail B23, and the two lower sliding wheels 704 are located on the lower surface of the upper flange of the guide rail B23; the top ends of the two splicing plates 701 of the sliding support wheel group B72 are fixedly installed on the top surface of the left top beam of the inner front door frame 20; the two upper sliding wheels 703 are located on the lower surface of the lower flange of the guide rail A12, and the two lower sliding wheels 704 are located on the upper surface of the lower flange of the guide rail A12; the top ends of the two splicing plates 701 of the sliding support wheel group C73 are fixedly installed on the bottom of the corresponding legs of the outer rear door frame 11; the two upper sliding wheels 703 are located on the upper surface of the upper flange of the guide rail C24, and the two lower sliding wheels 704 are located on the lower surface of the upper flange of the guide rail C24.

[0047] As attached Fig.10 , 15As shown in 16, the maintenance platform is provided with upper splicing plates 15 and lower splicing plates 16 corresponding to the front and rear ends of the inner gantry 2 at the front and rear ends of the outer front door frame 10, so as to facilitate the assembly of the maintenance platform and then hoist it as a whole. Maintenance paths 17 are provided on both sides of the bottom of the outer front door frame 10 and the bottom of the inner gantry 2, so as to facilitate the repair and maintenance of related equipment and the main cable; a number of cover plates 19 are provided between the corresponding maintenance paths 17, one end of the cover plate 19 is hinged to the maintenance path 17 on one side, and a hook 191 is provided at the other end of the cover plate 19, and the hook 191 is adapted to the groove of the holder 192 on the other side of the maintenance path 17, that is, the cover plate 19 is 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 3; after the support clamping mechanism 5 fixes the maintenance platform on the main cable 3, the cover plate 19 can be closed to prevent objects from falling under the main cable 3 when the maintenance personnel are working.

[0048] The embodiment of the method for winding the steel wire rope 63 of the hoist A621 of the main cable maintenance platform (i.e., a single maintenance platform) of the present invention is as follows:

[0049] As attached Figure 5 , 19 As shown, the winding embodiment 1 of the wire rope 63 of the hoist A621: the movable end of the wire rope 63 of the hoist A621 is wound around the rolling pulley 66, the fixed pulley 67 and the hook pulley 65 in sequence (the hook pulley 65 is a movable pulley, which drives the hook pulley 65 forward through the wire rope 63 thereon, and then drives the outer gantry 1 forward), and then connected with the hook A68 after being clamped by one or more limit gear sets; the traction force required for each hoist A621 in the embodiment 1 is 1 / 8 of the deadweight of the maintenance platform;

[0050] As attached Figure 5 , 20 As shown, a fixed pulley A671 is installed on the top of the fixed pulley 67, and the top of the fixed pulley A671 is fixed to the outer wall of the main tower 61; Embodiment 2 of winding of the wire rope 63 of the hoist A621: the movable end of the wire rope 63 of the hoist A621 is wound around the rolling pulley 66, the fixed pulley A671, the hook pulley 65 and the fixed pulley 67 in sequence, and then connected with the hook B69 of the hook pulley 65 after being clamped by one or more limit gear sets. In Embodiment 2, the traction force required for each hoist A621 is 1 / 10 of the deadweight of the maintenance platform;

[0051] The winding method of the wire rope 63 of the hoist B622 of the main cable maintenance platform (i.e., a single maintenance platform) of the present invention is as follows:

[0052] As attached Figure 6 , 21As shown, a fixed pulley A671 is installed on the top of the fixed pulley 67, and the top of the fixed pulley A671 is fixed to the outer wall of the main tower 61; Example 1 of winding of the wire rope 63 of the winch B622: the movable end of the wire rope 63 of the winch B622 is clamped by one or more limit gear groups, and then is wound around the fixed pulley A671, the hook pulley 65 and the fixed pulley 67 in sequence, and then is clamped by one or more limit gear groups and connected to the hook B69 of the hook pulley 65; the traction force required for each winch B622 in Example 1 is 1 / 6 of the weight of the maintenance platform.

[0053] As shown in Attachment 6 and 22, a fixed pulley A671 is installed on the top of the fixed pulley 67, and the top of the fixed pulley A671 is fixed to the outer wall of the main tower 61; Embodiment 2 of winding of the wire rope 63 of the hoist B622: the movable end of the wire rope 63 of the hoist B622 is clamped by one or more limit gear sets, and then wound around the fixed pulley A671, the rolling pulley 66, the fixed pulley 67 and the hook pulley 65 in sequence, and then connected to the hook A68 after being clamped by one or more limit gear sets; the traction force required for each hoist B622 in Embodiment 2 is 1 / 8 of the deadweight of the maintenance platform;

[0054] As attached Figure 6 , 23 As shown, a fixed pulley A671 is installed on the top of the fixed pulley 67, and a fixed pulley B672 is installed on the top of the fixed pulley A671, and the top of the fixed pulley B672 is fixed to the outer wall of the main tower 61; Example three of the winding of the wire rope 63 of the winch B622: the movable end of the wire rope 63 of the winch B622 is clamped by one or more limit gear groups, and then is wound around the fixed pulley B672, the rolling pulley 66, the fixed pulley A671, the hook pulley 65 and the fixed pulley 67 in sequence, and then is clamped by one or more limit gear groups and connected to the hook B69 of the hook pulley 65. The traction force required for each winch B622 in Example three is 1 / 10 of the weight of the maintenance platform.

[0055] As attached Fig.18 As shown, the fixed pulley 67, the fixed pulley A671, and the fixed pulley B672 can also be integrated into a coaxial fixed pulley 674. According to the different lengths of the main cable 3, two or more groups of maintenance platforms can be spliced ​​together. When an even number of maintenance platforms are used for splicing, the maintenance platforms on both sides are arranged symmetrically in sequence; when an odd number of maintenance platforms are used for splicing, the maintenance platforms on both sides are arranged symmetrically in sequence, and the arrangement direction of the middle maintenance platform is arranged along the travel direction of the main cable 3; the maintenance platforms are fixed and connected by bolts through the upper splicing plate 15 and the lower splicing plate 16.

[0056] As attached Figure 24-25And the direction indicated by it, this embodiment adopts two groups of maintenance platforms to connect, the front one is the front maintenance platform 100, and the rear one is the rear maintenance platform 200, and the hook pulley A651 is installed on the two side frames of the front end of the outer front door frame 10 of the rear maintenance platform 200; the rolling pulley A661 is installed on the two side frames of the front end of the inner front door frame 20 of the rear maintenance platform 200.

[0057] The front maintenance platform 100 is connected to the rear maintenance platform 200, and the winding method of the wire rope 63 of the hoist A621 is as follows:

[0058] As attached Fig.26 As shown in A, a fixed pulley A671 is installed on the top of the fixed pulley 67, and the top of the fixed pulley A671 is fixed to the outer wall of the main tower 61;

[0059] As attached Figure 5 , 24 As shown in , 25 and 26A, embodiment 1 of the winding of the steel wire rope 63 of the winch A621: the movable end of the steel wire rope 63 of the winch A621 is wound around the hook pulley A651, the fixed pulley A671, the rolling pulley 66, the fixed pulley 67 and the hook pulley 65 in sequence, and then connected with the hook A68 after being clamped by one or more limit gear sets; the traction force required for each winch A621 in embodiment 1 is 1 / 12 of the weight of the maintenance platform.

[0060] As attached Fig.26 As shown in FIG. 1B , a fixed pulley A671 is installed on the top of the fixed pulley 67, and a fixed pulley B672 is installed on the top of the fixed pulley A671. The top of the fixed pulley B672 is fixed to the outer wall of the main tower 61; Figure 5 , 24 As shown in , 25 and 26B, the winding embodiment 2 of the steel wire rope 63 of the winch A621: the movable end of the steel wire rope 63 of the winch A621 is wound around the hook pulley A651, the fixed pulley B672, the rolling pulley 66, the fixed pulley A671, the hook pulley 65 and the fixed pulley 67 in sequence, and then connected with the hook B69 of the hook pulley 65 after being clamped by one or more limit gear groups; the traction force required for each winch A621 of the embodiment 2 is 1 / 14 of the weight of the maintenance platform.

[0061] As attached Fig.26 C, a fixed pulley A671 is installed on the top of the fixed pulley 67, and a fixed pulley B672 is installed on the top of the fixed pulley A671. The top of the fixed pulley B672 is fixed to the outer wall of the main tower 61; Figure 5 , 24, 25, and 26C, embodiment three of the winding of the steel wire rope 63 of the winch A621: the movable end of the steel wire rope 63 of the winch A621 is sequentially wound around the hook pulley A651, the fixed pulley B672, the rolling pulley A661, the fixed pulley A671, the rolling pulley 66, the fixed pulley 67 and the hook pulley 65, and then connected to the hook A68 after being clamped by one or more limit gear groups; the traction force required for each winch A621 of embodiment three is 1 / 16 of the weight of the maintenance platform.

[0062] As attached Fig.26 As shown in FIG. 3 , a fixed pulley A671 is installed on the top of the fixed pulley 67, a fixed pulley B672 is installed on the top of the fixed pulley A671, and a fixed pulley C673 is installed on the top of the fixed pulley B672. The top of the fixed pulley C673 is fixed to the outer wall of the main tower 61; Figure 5 , 24 , 25, and 26D show the fourth embodiment of the winding of the wire rope 63 of the winch A621: the movable end of the wire rope 63 of the winch A621 is sequentially wound around the hook pulley A651, the fixed pulley C673, the rolling pulley A661, the fixed pulley B672, the rolling pulley 66, the fixed pulley A671, the hook pulley 65 and the fixed pulley 67, and then connected with the hook B69 of the hook pulley 65 after being clamped by one or more limit gear groups; the traction force required for each winch A621 of the fourth embodiment is 1 / 18 of the weight of the maintenance platform.

[0063] The front maintenance platform 100 is connected to the rear maintenance platform 200, and the winding method of the wire rope 63 of the hoist B622 is as follows:

[0064] As attached Fig. 27 As shown in a, a fixed pulley A671 is installed on the top of the fixed pulley 67, and a fixed pulley B672 is installed on the top of the fixed pulley A671, and the top of the fixed pulley B672 is fixed to the outer wall of the main tower 61; Figure 6 , 24 As shown in , 25 and 27a, embodiment 1 of the winding of the steel wire rope 63 of the winch B622: the movable end of the steel wire rope 63 of the winch B622 is clamped by one or more limit gear groups, and then is wound around the fixed pulley B672, the hook pulley A651, the fixed pulley A671, the rolling pulley 66, the fixed pulley 67 and the hook pulley 65 in sequence, and then is clamped by one or more limit gear groups and connected to the hook A68; the traction force required for each winch B622 in embodiment 1 is 1 / 12 of the weight of the maintenance platform.

[0065] As attached Fig. 27 As shown in FIG. 2 , a fixed pulley A671 is installed on the top of the fixed pulley 67, a fixed pulley B672 is installed on the top of the fixed pulley A671, and a fixed pulley C673 is installed on the top of the fixed pulley B672. The top of the fixed pulley C673 is fixed to the outer wall of the main tower 61; Figure 6 , 24 As shown in , 25 and 27b, the winding embodiment 2 of the steel wire rope 63 of the winch B622: the movable end of the steel wire rope 63 of the winch B622 is clamped by one or more limit gear groups, and then is wound around the fixed pulley C673, the hook pulley A651, the fixed pulley B672, the rolling pulley 66, the fixed pulley A671, the hook pulley 65 and the fixed pulley 67 in sequence, and then is clamped by one or more limit gear groups and connected to the hook B69 of the hook pulley 65; the traction force required for each winch B622 of the embodiment 2 is 1 / 14 of the weight of the maintenance platform.

[0066] As attached Fig. 27 c, a fixed pulley A671 is installed on the top of the fixed pulley 67, a fixed pulley B672 is installed on the top of the fixed pulley A671, and a fixed pulley C673 is installed on the top of the fixed pulley B672. The top of the fixed pulley C673 is fixed to the outer wall of the main tower 61; Figure 6 , 24 As shown in , 25 and 27c, the winding embodiment three of the wire rope 63 of the winch B622: the movable end of the wire rope 63 of the winch B622 is clamped by one or more limit gear groups, and then is wound around the fixed pulley C673, the hook pulley A651, the fixed pulley B672, the rolling pulley A661, the fixed pulley A671, the rolling pulley 66, the fixed pulley 67 and the hook pulley 65 in sequence, and then is clamped by one or more limit gear groups and connected to the hook A68; the traction force required for each winch B622 in the third embodiment is 1 / 16 of the weight of the maintenance platform.

[0067] As attached Fig.28 As shown, in order to reduce the overall deadweight of the structure, a structure combining two groups of maintenance platforms and an intermediate section frame 8 can also be adopted. The maintenance platforms on both sides are arranged symmetrically, and the intermediate section frame 8 is arranged with one or more groups of intermediate section frames 8 according to the different lengths of the maintenance main cable 3 to meet the detection requirements; the maintenance platform and the intermediate frame 8 are both connected and fixed by bolts of an upper splicing plate 15 and a lower splicing plate 16.

[0068] The movable and fixed pulleys of the maintenance platform of the present invention are arranged in sequence along the traction direction, which can not only greatly reduce the required traction force through the mutual conversion of the movable and fixed pulleys; at the same time, as the number of spliced ​​maintenance platforms increases, not only can the main cable maintenance length be extended, but also the required traction force can be further reduced, thereby greatly enhancing the adaptability of this type of maintenance platform under different working conditions, so that it can better meet diverse maintenance needs.

[0069] The hook pulley 65 and the rolling pulley 66 in the traction and winding device of the present invention are respectively installed on the two side frames of the front end of the inner and outer front door frames, and are easy to disassemble or install. This allows operators to easily inspect and replace parts of the traction device of the present invention during daily maintenance and repair. Compared with the complex traditional traction system, the traction and winding device of the present invention can greatly shorten the maintenance time and improve the utilization rate of the equipment.

[0070] The traction winding device of the present invention installs the winch A621 on the main tower, and can reduce the influence of the vibration of the main cable 3, wind load and other factors on the traction work during the traction process by means of the stable structure of the main tower 61 and the limitation of the limit gear 64, thereby better ensuring the stability of the traction and ensuring the safe operation of the maintenance platform. In some construction sites with limited space, the traction winding device of the present invention can also install the winch B622 on both sides of the top of the outer front door frame 10 for traction operations, which not only reduces the restrictions on the construction site, but also simplifies the installation process of the entire maintenance platform; at the same time, during the traction operation, the angle of the traction wire rope 63 can be adjusted according to actual needs, thereby more conveniently adjusting the posture of the platform so that the platform can be accurately docked at the desired position.

[0071] The traction winding method of the present invention can dynamically adjust the traction force according to the weight changes of the equipment and personnel on the platform; whether it is unloaded, lightly loaded or fully loaded, the traction system can ensure that the platform operates with the best performance. When the load increases, the fixed pulley 67 can be increased to ensure the normal driving speed and stability of the platform; and when the load decreases, the fixed pulley 67 can be reduced accordingly to avoid the traction wire rope 63 being too long and the waste of traction energy; this adaptive load adjustment capability allows the maintenance platform to be flexibly used in various working conditions, thereby greatly improving its versatility and practicality.

[0072] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any changes that adopt the design principles of the present invention and are made through non-creative labor on this basis should fall within the protection scope of the present invention.

Claims

1. A main cable maintenance platform traction winding device, characterized in that: The main cable maintenance platform comprises an outer gantry (1) and an inner gantry (2) which are connected to each other and can slide relative to each other; the traction winding device comprises a traction connection component A installed on the left and right sides of the outer front gantry (10), a traction connection component B installed on the left and right sides of the inner front gantry (20), and a traction mechanism wound and connected with the traction connection component A and the traction connection component B.

2. A main cable maintenance platform traction and winding device according to claim 1, characterized in that: The traction connection assembly A comprises a hook pulley (65) mounted on the two side frames of the front end of the outer front door frame (10), and a hook B (69) is arranged on the hook pulley (65); the traction connection assembly B comprises a rolling pulley (66) mounted on the two side frames of the front end of the inner front door frame (20); The traction mechanism comprises a winch, one or more limit gear sets installed on the cable clamp of the main cable (3), and fixed pulleys (67) installed on the outer wall of the main tower (61) and corresponding to both sides of the front end of the outer front door frame (10), and a steel wire rope (63) is installed on the winch; The limit gear set comprises two corresponding limit gears (64), and the two limit gears (64) are respectively in contact with corresponding sides of the steel wire rope (63); The hoisting machine comprises a hoisting machine A (621) installed on the main tower (61) and corresponding to both sides of the front end of the outer front door frame (10) or a hoisting machine B (622) installed on both sides of the top of the outer front door frame (10); There are 1 to 4 fixed pulleys (67), and two or more fixed pulleys (67) are connected end to end in sequence; a hook A (68) is installed at the bottom of the fixed pulley (67) located at the bottom; The steel wire rope (63) of the hoist A (621) or the hoist B (622) is connected to the hook A (68) or the hook B (69) after being wound around the hook pulley (65), the rolling pulley (66) and the fixed pulley (67) accordingly.

3. The main cable maintenance platform traction and winding device according to claim 1, characterized in that: The outer gantry (1) comprises an outer front gantry (10), an outer rear gantry (11), and a guide rail A (12) installed between the top surfaces of the outer front gantry (10) and the outer rear gantry (11); the inner gantry (2) comprises an inner front gantry (20), an inner rear gantry (21), and a middle truss frame (22) installed between the lower parts of the inner front gantry (20) and the inner rear gantry (21); A guide rail B (23) is installed between the top surfaces of the inner front door frame (20) and the inner rear door frame (21), a guide rail C (24) is installed above the middle truss frame (22), and a front guide wheel device (4) adapted to the main cable (3) is installed in the outer front door frame (10); a supporting clamping mechanism (5) adapted to the main cable (3) is arranged in the outer front door frame (10), the outer rear door frame (11), the inner front door frame (20) and the inner rear door frame (21); the supporting clamping mechanism (5) is connected to the controller by electrical signals; A sliding support wheel group A (71) cooperating with the guide rail B (23) is installed on the bottom surface of the top beam of the outer rear door frame (11), and a sliding support wheel group B (72) cooperating with the guide rail A (12) is installed on the top surface of the top beam of the inner front door frame (20); and a sliding support wheel group C (73) cooperating with the guide rail C (24) is installed at the bottom of the supporting leg of the outer rear door frame (11).

4. A main cable maintenance platform traction and winding device according to claim 3, characterized in that: The front guide wheel device (4) is fixedly installed in the outer front door frame (10), and comprises a guide wheel frame (43), a supporting hydraulic cylinder (41) installed in the middle of the top surface of the guide wheel frame (43) through a rotating bearing (42), a running wheel (44) symmetrically rotated and installed at the bottom of the guide wheel frame (43), and a buffer assembly connected to the running wheel (44); The supporting and clamping mechanism (5) is arranged at the rear side of the front guide wheel device (4); the supporting and clamping mechanism (5) comprises a main supporting mechanism (51) in contact with or separated from the upper surface of the main cable (3) and lateral clamping mechanisms (52) symmetrically arranged on both sides of the main cable (3); the two groups of lateral clamping mechanisms (52) are symmetrically arranged with the main cable (3) as the axis.

5. A main cable maintenance platform traction winding method, characterized in that: The method of winding the steel wire rope (63) of the winch A (621) is as follows: The movable end of the wire rope (63) of the hoist A (621) is wound around a rolling pulley (66), a fixed pulley (67) and a hook pulley (65) in sequence, and then connected to the hook A (68) after being clamped by one or more limit gear sets; the traction force required for each hoist A (621) is 1 / 8 of the deadweight of the maintenance platform; Or: a fixed pulley A (671) is installed on the top of the fixed pulley (67), and the top of the fixed pulley A (671) is fixed to the outer wall of the main tower (61); the movable end of the wire rope (63) of the hoist A (621) is wound around the rolling pulley (66), the fixed pulley A (671), the hook pulley (65) and the fixed pulley (67) in sequence, and then connected to the hook B (69) of the hook pulley (65) after being clamped by one or more limit gear groups, and the traction force required for each hoist A (621) is 1 / 10 of the deadweight of the maintenance platform.

6. A main cable maintenance platform traction and winding method, characterized in that: The method of winding the steel wire rope (63) of the winch B (622) is as follows: A fixed pulley A (671) is installed on the top of the fixed pulley (67), and the top of the fixed pulley A (671) is fixed to the outer wall of the main tower (61); the movable end of the wire rope (63) of the hoist B (622) is clamped by one or more limit gear groups, and then wound around the fixed pulley A (671), the hook pulley (65) and the fixed pulley (67) in sequence, and then clamped by one or more limit gear groups and connected to the hook B (69) of the hook pulley (65); the traction force required for each hoist B (622) is 1 / 6 of the deadweight of the maintenance platform; Or: the movable end of the wire rope (63) of the hoist B (622) is clamped by one or more limit gear sets, and then wound around the fixed pulley A (671), the rolling pulley (66), the fixed pulley (67) and the hook pulley (65) in sequence, and then connected to the hook A (68) after being clamped by one or more limit gear sets; the traction force required for each hoist B (622) is 1 / 8 of the deadweight of the maintenance platform; Or: a fixed pulley A (671) is installed on the top of the fixed pulley (67), and a fixed pulley B (672) is installed on the top of the fixed pulley A (671), and the top of the fixed pulley B (672) is fixed to the outer wall of the main tower (61); the movable end of the wire rope (63) of the hoist B (622) is clamped by one or more limit gear groups, and then wound around the fixed pulley B (672), the rolling pulley (66), the fixed pulley A (671), the hook pulley (65) and the fixed pulley (67) in sequence, and then clamped by one or more limit gear groups and connected to the hook B (69) of the hook pulley (65); the traction force required for each hoist B (622) is 1 / 10 of the deadweight of the maintenance platform.

7. A main cable maintenance platform traction and winding method, characterized in that: A front maintenance platform (100) and a rear maintenance platform (200) are connected, and hook pulleys A (651) are installed on both sides of the front frame of the outer front door frame (10) of the rear maintenance platform (200); rolling pulleys A (661) are installed on both sides of the front frame of the inner front door frame (20) of the rear maintenance platform (200); the front maintenance platform (100) is connected to the rear maintenance platform (200), and the winding method of the wire rope (63) of the winch A (621) is as follows: A fixed pulley A (671) is installed on the top of the fixed pulley (67), and the top of the fixed pulley A (671) is fixed to the outer wall of the main tower (61); the movable end of the wire rope (63) of the hoist A (621) is wound around the hook pulley A (651), the fixed pulley A (671), the rolling pulley (66), the fixed pulley (67) and the hook pulley (65) in sequence, and then connected to the hook A (68) after being clamped by one or more limit gear groups; the traction force required for each hoist A (621) is 1 / 12 of the deadweight of the maintenance platform; Or: a fixed pulley A (671) is installed on the top of the fixed pulley (67), a fixed pulley B (672) is installed on the top of the fixed pulley A (671), and the top of the fixed pulley B (672) is fixed to the outer wall of the main tower (61); the movable end of the wire rope (63) of the hoist A (621) is wound around the hook pulley A (651), the fixed pulley B (672), the rolling pulley (66), the fixed pulley A (671), the hook pulley (65) and the fixed pulley (67) in sequence, and then connected to the hook B (69) of the hook pulley (65) after being clamped by one or more limit gear groups; the traction force required for each hoist A (621) is 1 / 14 of the deadweight of the maintenance platform; Or: the movable end of the wire rope (63) of the hoist A (621) is wound around the hook pulley A (651), the fixed pulley B (672), the rolling pulley A (661), the fixed pulley A (671), the rolling pulley (66), the fixed pulley (67) and the hook pulley (65) in sequence, and then connected to the hook A (68) after being clamped by one or more limit gear sets; the traction force required for each hoist A (621) is 1 / 16 of the deadweight of the maintenance platform; Or: a fixed pulley A (671) is installed on the top of the fixed pulley (67), a fixed pulley B (672) is installed on the top of the fixed pulley A (671), a fixed pulley C (673) is installed on the top of the fixed pulley B (672), and the top of the fixed pulley C (673) is fixed to the outer wall of the main tower (61); the movable end of the steel wire rope (63) of the hoist A (621) is wound around the hook pulley A (651), the fixed pulley C (673), the rolling pulley A (661), the fixed pulley B (672), the rolling pulley (66), the fixed pulley A (671), the hook pulley (65) and the fixed pulley (67) in sequence, and then connected to the hook B (69) of the hook pulley (65) after being clamped by one or more limit gear groups; the traction force required for each hoist A (621) is 1 / 18 of the deadweight of the maintenance platform.

8. A main cable maintenance platform traction and winding method, characterized in that: A front inspection platform (100) and a rear inspection platform (200) are connected, and hook pulleys A (651) are installed on both sides of the front frame of the outer front door frame (10) of the rear inspection platform (200); rolling pulleys A (661) are installed on both sides of the front frame of the inner front door frame (20) of the rear inspection platform (200); the front inspection platform (100) is connected to the rear inspection platform (200), and the winding method of the wire rope (63) of the winch B (622) is as follows: A fixed pulley A (671) is installed on the top of the fixed pulley (67), and a fixed pulley B (672) is installed on the top of the fixed pulley A (671), and the top of the fixed pulley B (672) is fixed to the outer wall of the main tower (61); the movable end of the wire rope (63) of the winch B (622) is clamped by one or more limit gear groups, and then wound around the fixed pulley B (672), the hook pulley A (651), the fixed pulley A (671), the rolling pulley (66), the fixed pulley (67) and the hook pulley (65) in sequence, and then connected to the hook A (68) after being clamped by one or more limit gear groups; the traction force required for each winch B (622) is 1 / 12 of the deadweight of the maintenance platform; Or: a fixed pulley A (671) is installed on the top of the fixed pulley (67), a fixed pulley B (672) is installed on the top of the fixed pulley A (671), a fixed pulley C (673) is installed on the top of the fixed pulley B (672), and the top of the fixed pulley C (673) is fixed to the outer wall of the main tower (61); the movable end of the wire rope (63) of the hoist B (622) is clamped by one or more limit gear groups, and then wound around the fixed pulley C (673), the hook pulley A (651), the fixed pulley B (672), the rolling pulley (66), the fixed pulley A (671), the hook pulley (65) and the fixed pulley (67) in sequence, and then connected to the hook B (69) of the hook pulley (65) after being clamped by one or more limit gear groups; the traction force required for each hoist B (622) is 1 / 14 of the deadweight of the maintenance platform; Or: the movable end of the wire rope (63) of the hoist B (622) is clamped by one or more limit gear groups, and then is wound around the fixed pulley C (673), the hook pulley A (651), the fixed pulley B (672), the rolling pulley A (661), the fixed pulley A (671), the rolling pulley (66), the fixed pulley (67) and the hook pulley (65) in sequence, and then is clamped by one or more limit gear groups and connected to the hook A (68); the traction force required for each hoist B (622) is 1 / 16 of the deadweight of the maintenance platform.

9. The main cable maintenance platform traction and winding method according to any one of claims 5 to 8, characterized in that: The fixed pulley (67), fixed pulley A (671), fixed pulley B (672) and fixed pulley C (673) may also be integrated into a coaxial fixed pulley (674).

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