Double-portal-frame traction walking wheel type main cable maintenance platform and traction advancing method

Abstract

The invention relates to a double-portal-frame traction walking wheel type main cable maintenance platform and a traction advancing method. The maintenance platform comprises an outer portal frame and an inner portal frame. The outer portal frame comprises outer front and rear door frames and a guide rail A; traction connecting assemblies A are mounted on the left side and the right side of the outer front door frame; the inner portal frame comprises an inner front door frame, an inner rear door frame and a middle truss frame. Traction connecting assemblies B are installed on the left side and the right side of the inner front door frame. The traction connecting components A and B are respectively connected with the traction mechanism; a step of a traction advancing method; the movable pulley and the fixed pulley are sequentially arranged in the traction direction, and the needed traction force is greatly reduced through conversion of the movable pulley and the fixed pulley; along with the increase of the splicing number of the maintenance platforms, the maintenance length of the main cable can be expanded, the required traction force is further reduced, the adaptability of the maintenance platforms under different working conditions is enhanced, and diversified maintenance requirements are better met; the traction walking method guarantees the effective load of the maintenance platform and improves the high-altitude obstacle crossing ability of the maintenance platform.

Description

Technical Field

[0001] The invention relates to a double-gantry traction walking wheel type main cable maintenance platform and a traction traveling method, belonging to the technical field of main cable detection and maintenance of suspension bridges. Background Art

[0002] With the improvement of my country's transportation infrastructure, the construction pace of suspension bridges will gradually slow down, and my country's suspension bridges will shift from the peak construction period to the operation and maintenance period. As the main load-bearing component of the suspension bridge, the main cable has been subjected to various adverse environmental erosions for a long time, and has successively suffered from cracks in the protective layer, damage to the wire winding, displacement of the cable clamp, and rust of the steel wire. If the main cable disease cannot be treated in time, it will affect the normal use function of the suspension bridge and the safety of public transportation.

[0003] In order to accurately evaluate the corrosion of the longitudinal steel wire inside the main cable, at present, main cable opening and maintenance is one of the research hotspots of main cable operation and maintenance technology; however, the existing large-scale maintenance vehicles or maintenance platforms have simple structures, single functions, and low effective load, which makes the maintenance personnel rely on the existing inspection platforms to only carry out some simple daily maintenance; Chinese invention application 2023108662235 discloses a main cable protection wheeled movable catwalk construction platform for a serving suspension bridge, which uses a traction cable clamp (or temporary cable clamp) to move. If the traction cable clamp is used, damage to the cable clamp is inevitable during the movement. After the main cable opening and maintenance is completed, it is often necessary to perform secondary inspection and tensioning of the axial force of each cable clamp screw to avoid displacement of the cable clamp, and the operation is time-consuming and labor-intensive; if the traction temporary cable clamp is used, the temporary cable clamp must be continuously disassembled and assembled during the movement. Not only will the main cable protective layer be damaged when the cable clamp is disassembled and assembled, but this travel method is inefficient and requires a large amount of manpower to assist in the operation at high altitude, which poses a safety hazard.

[0004] Chinese invention application 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 through the movable pulley, the steering pulley and the fixed pulley in sequence to achieve traction of the construction platform. However, 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.

[0005] Chinese invention application 202010209705.X ​​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, the supporting and clamping device comprising 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 is in contact with or separated 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 is in contact with or separated from the left and right side surfaces of the main cable respectively. In the actual operation of the above-mentioned technical solution, 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, which will cause the walking device to damage the outer protective layer of the main cable during the operation; at the same time, during the traction process, the maintenance platform itself will twist, making it difficult for the main cable maintenance platform to land in the center of the main cable, and may even overturn in severe cases; if it is not handled in time, it will affect the normal maintenance function of the main cable maintenance platform and cause public transportation safety. 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 double-gantry traction walking wheel main cable maintenance platform and a traction travel method which has non-destructive travel, is easy to assemble and has strong climbing ability.

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

[0008] The double-gantry traction walking wheel type main cable maintenance platform of the present invention comprises an outer gantry and an inner gantry which are connected with each other; the outer gantry comprises an outer front gantry, an outer rear gantry and a guide rail A installed between the top surfaces of the outer front gantry and the outer rear gantry; a traction connection component A is installed on the left and right sides of the outer front gantry; the inner gantry comprises an inner front gantry, an inner rear gantry and a middle truss frame installed between the lower parts of the inner front gantry and the inner rear gantry, and a traction connection component B is installed on the left and right sides of the inner front gantry; the traction connection component A and the traction connection component B are respectively connected to the traction mechanism; a traction connection component A is installed between the top surfaces of the inner front gantry and the inner rear gantry Install guide rail B, install guide rail C above the middle truss frame, and install a front guide wheel device compatible with the main cable in the outer front door frame; set support clamping mechanisms compatible with the main cable in the outer front door frame, the outer rear door frame, the inner front door frame and the inner rear door frame; the support clamping mechanism is connected with the controller by electrical signals; install a support wheel group A that slides with guide rail B on the bottom surface of the outer rear door frame top beam, and install a sliding support wheel group B that slides with guide rail A on the top surface of the inner front door frame top beam; install a sliding support wheel group C that slides with guide rail C at the bottom of the outer rear door frame support leg; set limit components on guide rails A, guide rails B and guide rails C.

[0009] The traction and traveling method of the double-gantry traction walking wheel type main cable maintenance platform of the present invention comprises: connecting the outer gantry and the inner gantry to form the maintenance platform, and arranging the two walking wheels of the maintenance platform on the upper surface of the main cable. The traction and traveling method of the maintenance platform adopts the following steps:

[0010] S1. Separate the support and clamping mechanism of the platform's outer gantry from the main cable through the controller, and clamp the support and clamping mechanism of the inner gantry tightly with the main cable to fix the inner gantry on the main cable; S2. Drive the outer gantry to slide forward relative to the main cable through the wire rope traction of winch A or winch B, and the hook pulley slides forward along the traction direction with the outer gantry. The front guide wheel device moves along the main cable to ensure automatic deviation correction of the outer gantry; when the specified distance is reached, the outer gantry stops; S3. Control the support and clamping mechanism of the outer gantry to clamp the main cable through the controller, and the outer gantry is fixed on the main cable; control the inner gantry through the controller The support and clamping mechanism of the gantry is separated from the main cable; S4, through the wire rope traction of winch A or winch B, the inner gantry is driven to slide forward relative to the main cable, and the rolling pulley slides forward along the traction direction with the inner gantry; when the specified distance is reached, the inner gantry stops; S5, the support and clamping mechanism of the inner gantry is controlled by the controller to hold the main cable tightly, so that the maintenance platform is fixed on the main cable as a whole; S6, repeat S1-S5, through the alternating opening and closing of the support and clamping mechanisms of the outer gantry and the inner gantry and the wire rope traction of winch A (or winch B), the maintenance platform is made to creep on the main cable.

[0011] The traction and traveling method of the double-gantry traction walking wheel type main cable maintenance platform of the present invention comprises the following steps: the front maintenance platform and the rear maintenance platform are formed by correspondingly sleeved two sets of outer gantries and inner gantries respectively; the corresponding ends of the inner gantries of the front maintenance platform and the rear maintenance platform are connected by bolts of an upper splicing plate and a lower splicing plate; the walking wheels of the two maintenance platforms are correspondingly arranged on the upper surface of the main cable; the traction and traveling method of the assembled front maintenance platform and the rear maintenance platform adopts the following steps:

[0012] S1. The outer gantry support clamping mechanism of the front maintenance platform is separated from the main cable through the controller, and the inner gantry of the front maintenance platform and the support clamping mechanism of the rear maintenance platform are tightly held with the main cable, so that the inner gantry of the front maintenance platform and the rear maintenance platform are fixed on the main cable;

[0013] S2. The outer gantry is driven to slide forward relative to the main cable by the wire rope traction of winch A or winch B. The hook pulley slides forward along the traction direction with the outer gantry of the front maintenance platform. The front guide wheel device moves along the main cable to ensure the automatic deviation correction of the outer gantry. When the outer gantry reaches the specified distance, it stops. S3. The support clamping mechanism of the outer gantry of the front maintenance platform is controlled by the controller to hold the main cable tightly, so that the outer gantry of the front maintenance platform is fixed on the main cable. The supporting clamping mechanism on the inner gantry of the front and rear maintenance platforms is separated from the main cable, and the supporting clamping mechanism on the outer gantry of the rear maintenance platform is kept tightly holding the main cable, so that the outer gantry of the rear maintenance platform is fixed on the main cable; S4, through the wire rope traction of winch A or winch B, the inner gantry of the front and rear maintenance platforms is driven to move forward relative to the main cable, and the rolling pulley slides forward along the traction direction with the inner gantry of the front and rear maintenance platforms; when the specified distance is reached, the front maintenance platform and The inner gantry of the rear maintenance platform stops; S5, through the controller, the support clamping mechanism of the inner gantry of the front maintenance platform and the rear maintenance platform is controlled to hold the main cable tightly, so that the front maintenance platform and the rear maintenance platform are fixed on the main cable as a whole; through the controller, only the support clamping mechanism of the outer gantry of the rear maintenance platform is separated from the main cable, and the inner gantry of the rear maintenance platform and the support clamping mechanism of the front maintenance platform are kept tightly holding the main cable, so that the inner gantry of the rear maintenance platform and the front maintenance platform are fixed on the main cable; S6, through the winding The steel wire rope of winch A or winch B pulls the outer gantry of the rear maintenance platform to slide forward with respect to the main cable, and the hook pulley B slides forward along the traction direction with the outer gantry of the rear maintenance platform, and the front guide wheel device ensures that the outer gantry of the rear maintenance platform automatically corrects the deviation when traveling; when traveling to a specified distance, the outer gantry of the rear maintenance platform stops; S7, the support clamping mechanism of the outer gantry of the rear maintenance platform is controlled by the controller to hold the main cable tightly, so that the outer gantry of the rear maintenance platform is fixed on the main cable;

[0014] S8. Repeat S1-S7, and realize the creeping movement of the front maintenance platform and the rear maintenance platform on the main cable through the alternate opening and closing of the supporting clamping mechanism of the outer gantry and the inner gantry and the wire rope traction of the winch A or the winch B.

[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 check 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 gantry 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, and then the posture of the platform can be adjusted more conveniently, so that the platform can accurately dock at the required position. (4) The maintenance platform of the present invention straddles the main cable, and its internal effective net clamping space can be used for the maintenance of most main cables. (5) The present invention allows the maintenance platform to creep and climb on the main cable through the alternating opening and closing of the support clamping mechanism of the outer gantry and the inner gantry, which not only avoids damage to the main cable during the travel process, but also effectively transmits mechanical torque and improves the climbing ability of the overall structure. (6) The maintenance platform of the present invention reduces damage to the protective layer of the main cable through the "point contact" of multiple sets of support clamping mechanisms on the main cable; avoids accidents caused by insufficient contact of a certain hydraulic cylinder with the main cable. (7) The traction walking method of the present invention can not only ensure the effective load of the maintenance platform, but also improve the high-altitude obstacle-crossing ability of the maintenance platform, thereby avoiding collisions between the maintenance platform and main cable auxiliary components such as cable clamps, air clamps, and handrails when the maintenance platform is moving, thereby enabling the maintenance platform to move to any position of the main cable for inspection and maintenance; at the same time, the traction walking method of the present invention can also effectively fix the maintenance platform on the main cable during its movement, thereby reducing the impact of high-altitude wind loads on it. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 Schematic diagram of the maintenance platform structure of the present invention; Figure 2 Schematic diagram of the external gantry structure of the maintenance platform of the present invention; Figure 3Schematic diagram of the gantry structure in the maintenance platform of the present invention; Figure 4 Schematic diagram of the front view structure of the gantry in the maintenance platform of the present invention; Figure 5 Schematic diagram of the structure of the winch A of the present invention installed on the main tower; Figure 6 FIG. 1 is a structural schematic diagram of a first embodiment of a wire rope winding of a winch A of the present invention; Figure 7 FIG. 1 is a structural schematic diagram of a second embodiment of the wire rope winding of a winch A of the present invention; Figure 8 Schematic diagram of the wire rope winding structure of two groups of spliced ​​winches A of the maintenance platform of the present invention; Fig. 9 Schematic diagram of the structure of the winch B of the present invention installed on the outer front door frame; Fig.10 FIG. 1 is a structural schematic diagram of a first embodiment of a wire rope winding arrangement of a winch B of the present invention; Fig.11 FIG. 1 is a structural schematic diagram of a second embodiment of the wire rope winding of a winch B of the present invention; Fig.12 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.13 Schematic diagram of the wire rope winding structure of two groups of spliced ​​winches B of the maintenance platform of the present invention; Fig.14 Schematic diagram of the shaft side structure of the front guide wheel device of the maintenance platform of the present invention; Fig.15 Schematic diagram of the front guide wheel device of the maintenance platform of the present invention; Fig.16 Schematic diagram of the front guide wheel device of the maintenance platform of the present invention from the side view; Fig.17 Schematic diagram of the contact structure between the front guide wheel device and the main cable knot of the maintenance platform of the present invention; Fig.18 Schematic diagram of the main support structure of the maintenance platform of the present invention; Fig.19 Schematic diagram of the main support structure of the maintenance platform of the present invention; Fig. 20 Schematic diagram of the structure of the torsion self-adjusting device of the present invention; Fig.21 Schematic diagram of the axial structure of the lateral hydraulic cylinder of the present invention; Fig. 22 Schematic diagram of the structure of the upper splicing plate and the lower splicing plate on the maintenance platform of the present invention; Fig.23 Schematic diagram of the installation structure of the maintenance platform cover plate of the present invention; Fig.24 Schematic diagram of the structure of the two limit gears of the maintenance platform of the present invention contacting the wire rope respectively; Fig.25 Schematic diagram of the coaxial fixed pulley structure of the maintenance platform of the present invention; Fig.26 Schematic diagram of the splicing structure of two groups of maintenance platforms of the present invention; Fig. 27 Schematic diagram of the structure of two groups of maintenance platforms of the present invention connected by an intermediate frame; Fig.28 Schematic diagram of the process structure of the maintenance platform traction travel method of the present invention; Fig.29 It is a schematic diagram of the process structure of the traction and advancement method of the maintenance platform of the present invention which is spliced ​​with two groups.

[0017] In the attached picture:

[0018] 1 outer gantry, 10 outer front gantry, 11 outer rear gantry, 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, 20 inner front gantry, 21 inner rear gantry, 22 middle truss frame, 23 guide rail B, 24 guide rail C;

[0020] 3 Main cables;

[0021] 4 front guide wheel device, 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 baffle;

[0022] 5 support clamping mechanism, 51 main support mechanism, 511 main hydraulic cylinder, 512 elevation hydraulic cylinder, 513 universal ball, 514 support seat, 515 arc support plate; 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; 53 reverse support rod;

[0023] 61 main tower, 621 winch A, 622 winch B, 63 wire rope, 64 limit gear, 65 hook pulley, 651 hook pulley B, 66 rolling pulley, 67 fixed pulley, 671 fixed pulley A, 672 fixed pulley B, 673 coaxial fixed pulley, 68 hook A, 69 hook B;

[0024] 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;

[0025] 8 middle section frame. DETAILED DESCRIPTION

[0026] As attached Figure 1-4As shown, the double-gantry traction walking wheel type main cable maintenance platform of the present invention comprises an outer gantry 1 and an inner gantry 2 which are connected with each other; the outer gantry 1 comprises 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; a traction connection assembly A is installed on the left and right sides of the outer front gantry 10; 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, Traction connection components B are installed on the left and right sides of the inner front door frame 20; the traction connection components A and traction connection components B are respectively connected to the traction mechanism; a guide rail B23 is installed between the top surfaces of the inner front door frame 20 and the inner rear door frame 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 door frame 10; a supporting clamping mechanism 5 adapted to the main cable 3 is correspondingly 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; a supporting The support clamping mechanism 5 is connected to the controller by electrical signals; a support wheel group A71 that slides 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 group B72 that slides 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 group C73 that slides with the guide rail C24 is installed at the bottom of the supporting leg 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 four parallelly arranged. Two; support slide blocks 13 are installed at the four corners of the top of the inner front door frame 20; the lower flanges of the two outer guide rails A12 are slidably set in the support slide blocks 13; limit assemblies are set 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. Four groups of support slide blocks 13 are set in parallel on the top of the outer front door frame 10, each group of support slide blocks 13 has three, and each group of support slide blocks 13 is welded to the 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.

[0027] As attached Figure 2 , 3 As shown in Figures 5 and 9, the traction connection assembly A of the maintenance platform of the present invention comprises a hook pulley 65 installed on the two side frames of the front end of the outer front door frame 10, and a hook B69 is arranged on the hook pulley 65; the traction connection assembly B comprises a rolling pulley 66 installed 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 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; a steel wire rope 63 is installed on the winch; as shown in Figure 1 Fig.24As shown, the limit gear group includes two corresponding limit gears 64, the wire rope 63 passes through the two limit gears 64, and the two limit gears 64 are respectively in contact with the corresponding sides of the 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; the fixed pulleys 67 are 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 located at the bottom; the wire rope 63 of the winch A621 or the winch B622 is connected to the hook pulley 65, the rolling pulley 66 and the fixed pulley 67 after being wound around, and is connected to the hook A68 or the hook B69; there are two winches A621 or winches B622.

[0028] The following describes in detail the winding embodiments of the steel wire rope 63 of the hoist A621 and the steel wire rope 63 of the hoist B622 respectively:

[0029] As attached Figure 5 , 6 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, and then connected to 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;

[0030] As attached Figure 5 , 7 As shown, the second embodiment of the winding of the wire rope 63 of the winch A621: 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; the movable end of the wire rope 63 of the winch 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 groups. In the second embodiment, the traction force required for each winch A621 is 1 / 10 of the weight of the maintenance platform.

[0031] As attached Fig. 9 , 10 As shown, the winding embodiment 1 of the steel wire rope 63 of the winch B622 is as follows: 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; the movable end of the steel wire rope 63 of the winch B622 is clamped by one or more limit gear sets, and then wound around the fixed pulley A671, the hook pulley 65 and the fixed pulley 67 in sequence, and then clamped by one or more limit gear sets and connected to the hook B69 of the hook pulley 65; the traction force required for each winch B622 in embodiment 1 is 1 / 6 of the deadweight of the maintenance platform;

[0032] As attached Fig. 9 , 11 As shown, the winding embodiment 2 of the wire rope 63 of the winch B622: 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; the movable end of the wire rope 63 of the winch 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 winch B622 in the embodiment 2 is 1 / 8 of the deadweight of the maintenance platform;

[0033] As attached Fig. 9 , 12 As shown, the third embodiment of the winding of the wire rope 63 of the winch B622: 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; 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 the third embodiment is 1 / 10 of the weight of the maintenance platform.

[0034] As attached Fig.25 As shown, the fixed pulley 67, the fixed pulley A671, and the fixed pulley B672 can also be integrated into a coaxial fixed pulley 673.

[0035] As attached Figure 14-16 As shown, the front guide wheel device 4 of the maintenance platform of the present invention is fixedly installed in the outer front door 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 walking wheel 44 symmetrically installed at the bottom of the guide wheel frame 43, and a buffer assembly connected to the walking 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 door frame 10; the extension and shortening of the supporting hydraulic oil cylinder 41 can make the walking wheel 44 contact or separate from the upper surface of the main cable 3; 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.

[0036] 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.

[0037] As attached Figure 17-22 As shown, the support and clamping mechanism 5 of the maintenance platform of the present invention 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] As attached Fig.18 As shown, 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 of the present invention are the same; the sliding support wheel group A71 and the sliding support wheel group B72 are both four groups, and a 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; the sliding support wheel group A71, the sliding support wheel group B72 or the sliding support wheel group C73 includes 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; the two splicing plates 701 of the sliding support wheel group A71 The top of plate 701 is 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 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 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.

[0043] As attached Figure 1 , 2 As shown in Figures 22, the maintenance platform of the present invention 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 of the present invention and then hoist it as a whole. Fig.26 As shown, according to the different lengths of the main cable 3, one group of the maintenance platforms of the present invention can be used, or two or more groups of the maintenance platforms of the present invention can be spliced ​​together. When an even number of maintenance platforms are used for splicing, the maintenance platforms on both sides are symmetrically arranged in sequence; when an odd number of maintenance platforms are used for splicing, the maintenance platforms on both sides are symmetrically arranged 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 connected and fixed by bolts of an upper splicing plate 15 and a lower splicing plate 16.

[0044] As attached Figure 8 , 26 As shown, when two groups of maintenance platforms of the present invention are spliced, a hook pulley B651 is installed on the rear maintenance platform, and 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; the winding embodiment of the wire rope 63 of the winch A621 is as follows: the movable end of the wire rope 63 of the winch A621 is wound around the hook pulley B651, 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 groups; the traction force required for each winch A621 in this embodiment is 1 / 12 of the weight of the maintenance platform.

[0045] As attached Fig.13 , 26 As shown, when two groups of maintenance platforms of the present invention are spliced, a hook pulley B651 is installed on the rear maintenance platform, 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; the winding embodiment of the wire rope 63 of the winch B622 is as follows: 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 hook pulley B651, 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; in this embodiment, the traction force required for each winch B622 is 1 / 12 of the weight of the maintenance platform.

[0046] As attached Fig. 27 As shown, in order to reduce the overall deadweight of the structure, a structure combining two groups of the maintenance platforms of the present invention and the middle section frame 8 can be adopted. The maintenance platforms on both sides are arranged symmetrically, and the middle section frame 8 is arranged with one or more groups of middle section frames 8 according to the different lengths of the maintenance main cable 3 to meet the detection requirements; the maintenance platform and the middle frame 8 are both connected and fixed by bolts of the upper splicing plate 15 and the lower splicing plate 16.

[0047] As attached Fig.17 , 21 As shown in FIGS. 22 and 23, the present invention sets maintenance paths 17 on both sides of the bottom of the outer front door frame 10 and on both sides of the bottom of the inner gantry 2, so as to facilitate the repair and maintenance of related equipment and the main cable; a plurality of cover plates 19 are set 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 set 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, the maintenance platform of the present invention can be conveniently hoisted onto the main cable 3; when the supporting 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 traction and traveling method of the double-gantry traction walking wheel type main cable maintenance platform of the present invention:

[0049] Embodiment 1:

[0050] As attached Fig.28 As shown, the outer gantry 1 and the inner gantry 2 are connected to form a maintenance platform, and the two running wheels 44 of the maintenance platform are arranged on the upper surface of the main cable 3. The traction and travel method of the maintenance platform adopts the following steps: S1, as shown in the attached Fig.28 As shown in a, the support clamping mechanism 5 of the outer gantry 1 of the platform is separated from the main cable 3 through the controller, and the support clamping mechanism 5 of the inner gantry 2 is tightly held with the main cable 3, so that the inner gantry 2 is fixed on the main cable 3; S2, as shown in the attached Fig.28 b, through the traction of the wire rope 63 of the winch A621 or the winch B622, the outer gantry 1 is driven to slide forward relative to the main cable 3, and the hook pulley 65 slides forward along the traction direction with the outer gantry 1 (the hook pulley 65 is a movable pulley, and the wire rope 63 on it drives the hook pulley 65 forward, thereby driving the outer gantry 1 forward), and the front guide wheel device 4 moves along the main cable 3 to ensure that the outer gantry 1 automatically corrects its deviation; when it moves to a specified distance, the outer gantry 1 stops; S3, as shown in the attached Fig.28 As shown in FIG. 2 , the supporting clamping mechanism 5 of the outer gantry 1 is controlled by the controller to hold the main cable 3 tightly, and the outer gantry 1 is fixed on the main cable 3; Fig.28 c, the supporting clamping mechanism 5 of the inner gantry 2 is controlled by the controller to separate from the main cable 3; S4, as shown in the attached Fig.28 c, the inner gantry 2 is driven to slide forward relative to the main cable 3 by the wire rope 63 of the winch A621 or the winch B622, and the rolling pulley 66 slides forward along the traction direction with the inner gantry 2; when the inner gantry 2 reaches a specified distance, the inner gantry 2 stops; S5, as shown in the attached figure Fig.28 As shown in d, the controller controls the supporting clamping mechanism 5 of the inner gantry 2 to clamp the main cable 3, so that the maintenance platform is fixed on the main cable 3 as a whole; S6, repeat S1-S5, through the alternate opening and closing of the supporting clamping mechanism 5 of the outer gantry 1 and the inner gantry 2, and the traction of the wire rope 63 of the winch A621 or the winch B622, the maintenance platform can creep on the main cable 3.

[0051] Embodiment 2:

[0052] As attached Fig.29As shown, two sets of outer gantry 1 and inner gantry 2 are respectively connected to form a front maintenance platform 100 and a rear maintenance platform 200, and the corresponding ends of the inner gantry 2 of the front maintenance platform 100 and the rear maintenance platform 200 are connected by bolts through an upper splicing plate 15 and a lower splicing plate 16; the walking wheels 44 of the two maintenance platforms are correspondingly set on the upper surface of the main cable 3, and the assembled front maintenance platform 100 and the rear maintenance platform 200 are towed and moved by the following steps: S1, as shown in the attached Fig.29 As shown in FIG. a, the outer gantry 1 supporting and clamping mechanism 5 of the front maintenance platform 100 is separated from the main cable 3 through the controller, and the inner gantry 2 of the front maintenance platform 100 and the supporting and clamping mechanism 5 of the rear maintenance platform 200 are tightly held with the main cable 3, so that the inner gantry 2 of the front maintenance platform 100 and the rear maintenance platform 200 are fixed on the main cable 3; S2, as shown in FIG. Fig.29 As shown in a and 29b, the outer gantry 1 is driven to slide forward relative to the main cable 3 by the wire rope 63 of the winch A621 or the winch B622, and the hook pulley 65 slides forward along the traction direction with the outer gantry 1 of the front maintenance platform 100, and the front guide wheel device 4 moves along the main cable 3 to ensure that the outer gantry 1 automatically corrects the deviation; when the specified distance is reached, the outer gantry 1 stops; S3, as shown in the attached Fig.29 As shown in FIG. 2 , the support clamping mechanism 5 of the outer gantry 1 of the front maintenance platform 100 is controlled by the controller to hold the main cable 3 tightly, so that the outer gantry 1 of the front maintenance platform 100 is fixed on the main cable 3; Fig.29 c, the controller controls the support clamping mechanism 5 on the inner gantry 2 of the front maintenance platform 100 and the rear maintenance platform 200 to separate from the main cable 3, and keeps the support clamping mechanism 5 of the outer gantry 1 of the rear maintenance platform 200 tightly holding the main cable 3, so that the outer gantry 1 of the rear maintenance platform 200 is fixed on the main cable 3; S4, as shown in the attached Fig.29 c, as shown in 29d, the inner gantry 2 of the front maintenance platform 100 and the rear maintenance platform 200 is driven forward relative to the main cable 3 by the wire rope 63 of the hoist A621 or the hoist B622, and the rolling pulley 66 slides forward along the traction direction along with the inner gantry 2 of the front and rear maintenance platforms; when the inner gantry 2 of the front and rear maintenance platforms reaches a specified distance, the inner gantry 2 of the front maintenance platform 100 and the rear maintenance platform 200 stops; S5, as shown in the attached Fig.29 d, by controlling the support clamping mechanism 5 of the inner gantry 2 of the front maintenance platform 100 and the rear maintenance platform 200 to hold the main cable 3 tightly, the front maintenance platform 100 and the rear maintenance platform 200 are fixed on the main cable 3 as a whole; as shown in the attached Fig.29 As shown in FIG. 5 , only the supporting clamping mechanism 5 of the outer gantry 1 of the rear maintenance platform 200 is separated from the main cable 3 by the controller, and the supporting clamping mechanism 5 of the inner gantry 2 of the rear maintenance platform 200 and the front maintenance platform 100 are kept tightly holding the main cable 3, so that the inner gantry 2 of the rear maintenance platform 200 and the front maintenance platform 100 are fixed on the main cable 3; S6, as shown in FIG. Fig.29 As shown in e and 29f, the outer gantry 1 of the rear maintenance platform 200 is driven to slide forward relative to the main cable 3 by the wire rope 63 of the winch A621 or the winch B622, and the hook pulley B651 slides forward along the traction direction with the outer gantry 1 of the rear maintenance platform 200, and the front guide wheel device 4 ensures that the outer gantry 1 of the rear maintenance platform 200 automatically corrects the deviation when traveling; when traveling to a specified distance, the outer gantry 1 of the rear maintenance platform 200 stops; S7, as shown in the attached Fig.29 As shown in f, the controller controls the supporting and clamping mechanism 5 of the outer gantry 1 of the rear maintenance platform 200 to clamp the main cable 3, so that the outer gantry 1 of the rear maintenance platform 200 is fixed on the main cable 3; S8, repeat S1-S7, through the alternate opening and closing of the supporting and clamping mechanism 5 of the outer gantry 1 and the inner gantry 2, and the traction of the wire rope 63 of the winch A621 or the winch B622, the front maintenance platform 100 and the rear maintenance platform 200 are allowed to creep on the main cable 3.

[0053] 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 this type of maintenance platform under different working conditions, so that it can better meet the diverse maintenance needs. The hook pulley 65 and the rolling pulley 66 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, and are easy to disassemble or install. This allows the operator to easily inspect the traction device of the present invention, replace parts, etc. during daily maintenance and repair. 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. 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.

[0054] The maintenance platform of the present invention straddles the main cable, and its internal effective net clamping space can be used for maintenance of most main cables; at the same time, the inspection platform is connected by splicing the upper splicing plate 15 and the lower splicing plate 16, and can be spliced ​​into different lengths according to different usage requirements, and has strong adaptability; the maintenance platform of the present invention uses the main cable as a support, and is provided with a maintenance road 17 and a cover plate 19, which ensures the load-bearing capacity of the maintenance platform, so that the maintenance platform can carry a variety of maintenance-related equipment, thereby realizing the main cable maintenance operations such as reinforcing protective coatings, adding maintenance facilities, replacing cable clamps, and opening cables for maintenance; the present invention enables the maintenance platform to creep and climb on the main cable 3 through the alternating opening and closing of the support clamping mechanism 5 of the outer gantry 1 and the inner gantry 2, which not only avoids damage to the main cable during the travel process. , and can effectively transmit mechanical torque to improve the climbing ability of the overall structure; the maintenance platform of the present invention has "point contact (that is, it is a point relative to the entire main cable)" on the main cable through multiple sets of supporting and clamping mechanisms 5; reducing damage to the protective layer of the main cable; avoiding accidents caused by insufficient contact of a certain hydraulic cylinder with the main cable; the traction walking method of the present invention can not only ensure the effective load of the maintenance platform, but also improve the high-altitude obstacle crossing ability of the maintenance platform, and avoid collision with main cable auxiliary components such as cable clamps, air clamps, and handrails when the maintenance platform is moving, so as to realize that the maintenance platform can move to any position of the main cable 3 for inspection and maintenance; at the same time, the traction walking method can also be effectively fixed on the main cable during the movement of the maintenance platform, reducing the influence of high-altitude wind load on it.

[0055] 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 double-gantry traction walking wheel main cable maintenance platform, characterized in that: It comprises an outer gantry (1) and an inner gantry (2) which are connected to each other; 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); a traction connection component A is installed on the left and right sides of the outer front gantry (10); 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 traction connection component B is installed on the left and right sides of the inner front gantry (20); the traction connection component A and the traction connection component B are respectively connected to a traction mechanism; 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 support wheel group A (71) that slides 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) that slides with the guide rail A (12) is installed on the top surface of the top beam of the inner front door frame (20); a sliding support wheel group C (73) that slides with the guide rail C (24) is installed at the bottom of the supporting leg of the outer rear door frame (11); A limit assembly is provided on the guide rail A (12), the guide rail B (23) and the guide rail C (24).

2. The double-gantry traction walking wheel main cable maintenance platform according to claim 1 is 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 groups installed on the cable clamp of the main cable (3), 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); a steel wire rope (63) is installed on the winch, and the limit gear group comprises two corresponding limit gears (64), and the two limit gears (64) are respectively in contact with the 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 double-gantry traction walking wheel main cable maintenance platform according to claim 2 is characterized in that: 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 sets. The traction force required by each hoist A (621) is 1 / 10 of the deadweight of the maintenance platform. The fixed pulley (67), the fixed pulley A (671) and the fixed pulley B (672) can be integrated into a coaxial fixed pulley (673).

4. The double-gantry traction walking wheel main cable maintenance platform according to claim 2 is characterized in that: 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 sets, 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 sets 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 winch B (622) is clamped by one or more limit gear sets, 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 connected to the hook B (69) of the hook pulley (65) after being clamped by one or more limit gear sets; the traction force required for each winch B (622) is 1 / 10 of the deadweight of the maintenance platform; The fixed pulley (67), the fixed pulley A (671), and the fixed pulley B (672) can be integrated into a coaxial fixed pulley (673).

5. The double-gantry traction walking wheel main cable maintenance platform according to claim 1 is 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 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 end of the cylinder body of the supporting hydraulic oil cylinder (41) is fixedly connected to the upper beam of the outer front door frame (10); The guide wheel frame (43) comprises a supporting plate (431), a support plate A (432) vertically fixedly mounted on both sides of one end of the supporting plate (431), a support plate B (433) vertically fixedly mounted on both sides of the other end of the supporting plate (431), a pressure-resistant platform A (434) fixedly mounted between the two support plates A (432), and a pressure-resistant platform B (435) fixedly mounted between the two support plates B (433); the rotating bearing (42) is mounted in the middle of the top surface of the supporting plate (431); The buffer assembly comprises a paddle A (436) hinged on the inner side of each support plate A (432), a paddle B (437) hinged on the inner sides of two support plates B (433), a pull rod A (438) fixedly installed between one ends of the two paddles A (436), a plurality of buffer rods A (439) having a gap passing through the pressure-resistant platform A (434) and having a bottom fixedly installed on the pull rod A (438), a high-pressure spring A (440) sleeved on each buffer rod A (439), and a pull rod B (441) fixedly installed between one ends of the two paddles B (437). ), a plurality of buffer rods B (442) having a gap passing through the pressure-resistant platform B (435) and having their bottoms fixedly mounted on the pull rod B (441), and a high-pressure spring B (443) mounted on each buffer rod B (442); a baffle (444) is fixedly mounted on the top of the buffer rod A (439) and the buffer rod B (442); the pull rod A (438) and the pull rod B (441) are arranged adjacent to each other, and two running wheels (44) are respectively and correspondingly mounted between the outer ends of the two paddles A (436) and the paddle B (437); the running wheels (44) are concave wheels.

6. The double-gantry traction walking wheel main cable maintenance platform according to claim 1 is characterized in that: The supporting and clamping mechanism (5) is arranged on 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; The main support mechanism (51) comprises a main hydraulic cylinder (511) and an elevation hydraulic cylinder (512) which are arranged vertically. 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). The bottom surface of the support seat (514) is provided with an arc-shaped support plate (515) matching the shape of the upper surface of the main cable (3). The lateral clamping mechanism (52) comprises a fixing seat (521) fixed to the columns of the outer gantry (1) and the inner gantry (2) in a transverse direction, a torsion self-adjusting device installed on the fixing seat (521), a lateral hydraulic cylinder (522) installed in a transverse direction on the torsion self-adjusting device, and a clamping seat (523) fixedly installed at the rod end of the lateral hydraulic cylinder (522) and corresponding to the side of the main cable (3), a fractal vise (524) is arranged outside the clamping seat (523), and a plurality of tiger claws (525) corresponding to the side of the main cable (3) are arranged outside the fractal vise (524); The arc-shaped support plate (515) and the tiger claw (525) are both made of rubber; The torsion self-adjusting device comprises an arc-shaped groove (526) arranged on a fixing seat (521), a rotating shaft (527) rotatably mounted in the arc-shaped groove (526), ​​a worm gear (528) rotatably mounted on the rotating shaft (527), a driving gear (529) fixedly mounted 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); The internal gear (530) is fixed to the fixing 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 (531) is connected to the torsion motor (532) installed on the lateral hydraulic cylinder (522); A reverse support rod (53) is bolted to the middle of the columns on the left and right sides of the outer gantry (1) and the inner gantry (2) frames, and the reverse support rod (53) is a rigid rod.

7. The double-gantry traction walking wheel main cable maintenance platform according to claim 1 is characterized in that: The guide rails A (12), B (23) and C (24) are all I-shaped guide rails; the guide rails A (12) are four parallelly arranged, and the guide rails B (23) are two parallelly arranged; support slide blocks (13) are installed at the four corners of the top of the inner front door frame (20); the lower flanges of the two outer guide rails A (12) are slidably arranged in the support slide blocks (13); The structures of the sliding support wheel group A (71), the sliding support wheel group B (72) and the sliding support wheel group C (73) are the same; the sliding support wheel group A (71) and the sliding support wheel group B (72) are four groups each, and one group of sliding support wheel groups C (73) is installed at the bottom of each leg of the outer rear door frame (11), for a total of four groups; The sliding support wheel set A (71), the sliding support wheel set B (72) or the sliding support wheel set C (73) comprises two splicing plates (701), two upper sliding wheels (703) installed at the upper part between the two splicing plates (701) via 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; The top ends of the two splicing plates (701) of the sliding support wheel group A (71) are fixedly mounted 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 B (23), and the two lower sliding wheels (704) are located on the lower surface of the upper flange of the guide rail B (23); The top ends of the two splicing plates (701) of the sliding support wheel group B (72) are fixedly mounted 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 A (12), and the two lower sliding wheels (704) are located on the upper surface of the lower flange of the guide rail A (12); The top ends of the two splicing plates (701) of the sliding support wheel group C (73) are fixedly mounted on the bottom ends 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 C (24), and the two lower sliding wheels (704) are located on the lower surface of the upper flange of the guide rail C (24).

8. The double-gantry traction walking wheel main cable maintenance platform according to claim 4 is characterized in that: The limiting assembly comprises limiting blocks A (141) fixedly mounted at both ends of the guide rail A (12), limiting blocks B (142) fixedly mounted at both ends of the guide rail B (23), and limiting blocks C (143) fixedly mounted at both ends of the guide rail C (24); An upper splicing plate (15) and a lower splicing plate (16) corresponding to the front and rear ends of the inner gantry (2) are arranged at the front and rear ends of the outer front door frame (10); Inspection paths (17) are arranged on both sides of the bottom of the outer front door frame (10) and on both sides of the bottom of the inner gantry frame (2), and a plurality of cover plates (19) are arranged between the corresponding inspection paths (17). One end of the cover plate (19) is hinged to the inspection path (17) on one side, and a hook (191) is arranged on the other end of the cover plate (19). The hook (191) is adapted to a groove of a holder (192) on the other side of the inspection path (17).

9. A method for traction and travel of a double-gantry traction walking wheel type main cable maintenance platform, characterized in that: The outer gantry (1) and the inner gantry (2) are connected to form a maintenance platform, and two running wheels (44) of the maintenance platform are arranged on the upper surface of the main cable (3). The maintenance platform is towed and moved by the following steps: S1. Using a controller, the support and clamping mechanism (5) of the platform outer gantry (1) is separated from the main cable (3), and the support and clamping mechanism (5) of the inner gantry (2) is tightly clamped to the main cable (3), so that the inner gantry (2) is fixed on the main cable (3); S2. The outer gantry (1) is driven to slide forward relative to the main cable (3) by the steel wire rope (63) of the winch A (621) or the winch B (622). The hook pulley (65) slides forward along the traction direction along with the outer gantry (1). The front guide wheel device (4) moves along the main cable (3) to ensure that the outer gantry (1) automatically corrects its deviation. When the outer gantry (1) moves to a specified distance, the outer gantry (1) stops. S3, controlling the supporting clamping mechanism (5) of the outer gantry (1) to hold the main cable (3) tightly through the controller, and fixing the outer gantry (1) on the main cable (3); controlling the supporting clamping mechanism (5) of the inner gantry (2) to separate from the main cable (3) through the controller; S4, the inner gantry (2) is driven to slide forward relative to the main cable (3) by the steel wire rope (63) of the hoist A (621) or the hoist B (622), and the rolling pulley (66) slides forward along the traction direction along with the inner gantry (2); when the inner gantry (2) reaches a specified distance, the inner gantry (2) stops; S5, controlling the supporting clamping mechanism (5) of the inner gantry (2) to hold the main cable (3) tightly by means of a controller, so that the maintenance platform is fixed on the main cable (3) as a whole; S6, repeat S1-S5, through the alternate opening and closing of the supporting clamping mechanism (5) of the outer gantry (1) and the inner gantry (2) and the traction of the steel wire rope (63) of the winch A (621) or the winch B (622), the maintenance platform is made to creep on the main cable (3).

10. A method for traction and travel of a double-gantry traction walking wheel type main cable maintenance platform, characterized in that: The two sets of outer gantries (1) and inner gantries (2) are respectively connected in a corresponding manner to form a front maintenance platform (100) and a rear maintenance platform (200); the corresponding ends of the inner gantries (2) of the front maintenance platform (100) and the rear maintenance platform (200) are bolted together via an upper splicing plate (15) and a lower splicing plate (16); the running wheels (44) of the two maintenance platforms are correspondingly arranged on the upper surface of the main cable (3); and the assembled front maintenance platform (100) and the rear maintenance platform (200) are towed and moved by the following steps: S1, using a controller to separate the supporting clamping mechanism (5) of the outer gantry (1) of the front maintenance platform (100) from the main cable (3), and to tightly hold the inner gantry (2) of the front maintenance platform (100) and the supporting clamping mechanism (5) of the rear maintenance platform (200) from the main cable (3), so that the inner gantry (2) of the front maintenance platform (100) and the rear maintenance platform (200) are fixed on the main cable (3); S2. The outer gantry (1) is driven to slide forward relative to the main cable (3) by the steel wire rope (63) of the winch A (621) or the winch B (622). The hook pulley (65) slides forward along the traction direction along with the outer gantry (1) of the front maintenance platform (100). The front guide wheel device (4) moves along the main cable (3) to ensure that the outer gantry (1) automatically corrects its deviation. When the outer gantry (1) moves to a specified distance, it stops. S3, controlling the supporting clamping mechanism (5) of the outer gantry (1) of the front maintenance platform (100) to clamp the main cable (3) through the controller, so that the outer gantry (1) of the front maintenance platform (100) is fixed on the main cable (3); The controller controls the support clamping mechanism (5) on the inner gantry (2) of the front maintenance platform (100) and the rear maintenance platform (200) to separate from the main cable (3), and keeps the support clamping mechanism (5) of the outer gantry (1) of the rear maintenance platform (200) tightly holding the main cable (3), so that the outer gantry (1) of the rear maintenance platform (200) is fixed on the main cable (3); S4, the inner gantries (2) of the front maintenance platform (100) and the rear maintenance platform (200) are driven to move forward relative to the main cable (3) by the steel wire rope (63) of the hoist A (621) or the hoist B (622), and the rolling pulley (66) slides forward along the traction direction along with the inner gantries (2) of the front and rear maintenance platforms; when the inner gantries (2) of the front maintenance platform (100) and the rear maintenance platform (200) move to a specified distance, the inner gantries (2) of the front maintenance platform (100) and the rear maintenance platform (200) stop; S5, controlling the supporting clamping mechanism (5) of the inner gantry (2) of the front maintenance platform (100) and the rear maintenance platform (200) to clamp the main cable (3) through the controller, so that the front maintenance platform (100) and the rear maintenance platform (200) are fixed on the main cable (3) as a whole; Only the supporting clamping mechanism (5) of the outer gantry (1) of the rear maintenance platform (200) is separated from the main cable (3) by a controller, and the supporting clamping mechanism (5) of the inner gantry (2) of the rear maintenance platform (200) and the front maintenance platform (100) are kept tightly holding the main cable (3), so that the inner gantry (2) of the rear maintenance platform (200) and the front maintenance platform (100) are fixed on the main cable (3); S6. The outer gantry (1) of the rear maintenance platform (200) is driven to slide forward relative to the main cable (3) by the steel wire rope (63) of the hoist A (621) or the hoist B (622). The hook pulley B (651) slides forward along the traction direction along with the outer gantry (1) of the rear maintenance platform (200). The front guide wheel device (4) ensures that the outer gantry (1) of the rear maintenance platform (200) automatically corrects its deviation when moving. When the outer gantry (1) of the rear maintenance platform (200) reaches a specified distance, the outer gantry (1) of the rear maintenance platform (200) stops. S7, controlling the supporting clamping mechanism (5) of the outer gantry (1) of the rear maintenance platform (200) to tightly hold the main cable (3) through the controller, so that the outer gantry (1) of the rear maintenance platform (200) is fixed on the main cable (3); S8, repeat S1-S7, through the alternate opening and closing of the supporting clamping mechanism (5) of the outer gantry (1) and the inner gantry (2) and the traction of the steel wire rope (63) of the winch A (621) or the winch B (622), the front maintenance platform (100) and the rear maintenance platform (200) can be moved creepingly on the main cable (3).

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