Suspension rod overhauling device and method for suspension bridge

Abstract

The invention discloses a suspender overhauling device and method for a suspension bridge, and particularly relates to the technical field of suspender overhauling, the suspender overhauling device comprises a tensioning mechanism, a hoisting mechanism and a strain gauge, the tensioning mechanism comprises two sets of fixing sleeve seats, and the two sets of fixing sleeve seats are arranged in parallel; the tensioning mechanism is fixedly installed on a main cable in the suspension bridge through two sets of fixing sleeve bases by using bolts, a steel wire rope inhaul cable is installed on each set of fixing sleeve bases, the ends of the steel wire rope inhaul cables are each of a casting type anchor head structure, and carrying pole beams are installed at the ends, at the same position, of the two steel wire rope inhaul cables. According to the invention, by arranging the tensioning mechanism, auxiliary connection between the main cable and the formal steel beam bracket standby lifting lug is carried out, and the main cable and the formal steel beam bracket standby lifting lug can be tensioned by tensioning the steel strands, so that the main cable and the formal steel beam bracket standby lifting lug can be tensioned, and the hoisting efficiency is improved. The device can be suitable for suspension bridge suspender replacement construction with a short suspender or limited space below a main cable, and the suspender replacement efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of suspender maintenance, in particular to a suspender maintenance device and method for a suspension bridge. BACKGROUND

[0002] The suspender of a suspension bridge is a key force component connecting the main cable and the stiffening beam, and its function is to transmit the self weight of the stiffening beam, vehicle load and the like to the main cable, and then to the foundation through the main tower and anchor.

[0003] When the rigid suspender of a suspension bridge is maintained, it needs to be disassembled and replaced, and when replaced, a hoisting device needs to be used separately to hoist, disassemble and install the new and old rigid suspenders, which is relatively troublesome. SUMMARY

[0004] The present application aims to provide a suspender maintenance device and method for a suspension bridge to solve the problems in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a suspender maintenance device for a suspension bridge, comprising a tensioning mechanism, a hoisting mechanism and a strain gauge, the tensioning mechanism comprising a fixed sleeve, the fixed sleeve being provided with two groups, the tensioning mechanism being fixedly installed on the main cable in the suspension bridge through the two groups of fixed sleeves using bolts, a steel wire rope cable being installed on each fixed sleeve, the end of the steel wire rope cable being provided with a cast anchor head structure, the end of the two steel wire rope cables at the same position being provided with a carrying pole beam, a steel strand being movably inserted into the middle of the carrying pole beam, a through-hole jack being fixedly installed on the middle of the carrying pole beam, the top end of the steel strand being fixedly installed on the tensioning end of the through-hole jack, a steel anchor box being fixedly installed on the bottom end of the steel strand through an anchor, the tensioning mechanism being connected with the formal steel beam bracket spare lifting lug through the steel anchor box using a pin shaft, the hoisting mechanism being provided with a mounting mechanism, and the strain gauge being installed on the new suspender to monitor the stress condition during the replacement of the suspender and after the replacement.

[0006] As a preferred technical scheme of the present application, the hoisting mechanism comprises connecting supports, two groups of the connecting supports are symmetrically arranged, both ends of the two groups of the connecting supports are provided with hoisting members, the hoisting members comprise first side frames and second side frames, the first side frames and the second side frames are symmetrically arranged in the form of frame structures, the main cable is located between the first side frames and the second side frames, the inner sides of the first side frames and the second side frames are fixedly provided with mounting inner seats, the mounting inner seats are fixedly provided with electric wheels, the electric wheels are in contact with the outer surface of the main cable, the top of the first side frame is integrally provided with an outer clamping protrusion, the top of the second side frame is integrally provided with an inner clamping protrusion, the outer clamping protrusion is movably clamped on the top of the second side frame, the inner clamping protrusion is movably clamped on the top of the first side frame, the middle part of the outer clamping protrusion is fixedly provided with a telescopic air cylinder, the middle part of the outer clamping protrusion is provided with a first slot, the middle part of the outer clamping protrusion is provided with a second slot, the driving end of the telescopic air cylinder passes through the first slot and the second slot in sequence and is fixedly provided with an anti-skid convex disc, the lower surface of the anti-skid convex disc is in contact with the outer surface of the main cable.

[0007] As a preferred technical scheme of the present application, the outer bottom of the first side frame and the second side frame is fixedly provided with a bottom auxiliary frame, one of the bottom auxiliary frames is rotatably provided with a first winding shaft, the other of the bottom auxiliary frames is rotatably provided with a second winding shaft, the opposite ends of the first winding shaft and the second winding shaft are rotatably provided with auxiliary support frames, the auxiliary support frames are fixedly provided on the first side frame and the second side frame respectively, the outer sides of the first winding shaft and the second winding shaft are fixedly provided with winding frames, the lower sides of the connecting supports are provided with winding steel ropes, the two ends of the winding steel ropes are wound on the corresponding winding frames on both sides.

[0008] As a preferred technical scheme of the present application, the end of the first winding shaft is integrally provided with a common driving clamping protrusion, the end of the second winding shaft is integrally provided with a common driving sleeve protrusion, the common driving clamping protrusion is movably clamped in the common driving sleeve protrusion.

[0009] As a preferred technical scheme of the present application, one of the bottom auxiliary frames is fixedly provided with a driving motor, the driving end of the driving motor is fixedly provided with the shaft end of the first winding shaft.

[0010] As a preferred technical scheme of the present application, the two ends of the connecting supports are integrally provided with rotating protrusions, the middle parts of the rotating protrusions are vertically provided with rotating vertical rods, the rotating vertical rods are rotatably provided on the outer top of the first side frame and the second side frame respectively.

[0011] As a preferred technical scheme of the present application, the outer top of the first side frame and the second side frame is fixedly provided with a rotating air cylinder, the driving end of the rotating air cylinder is fixedly provided with the top end of the corresponding rotating vertical rod.

[0012] As a preferred technical scheme of the present application, the mounting mechanism comprises two mounting half-frames symmetrically distributed, the top of the suspender is movably clamped between the two mounting half-frames, the opposite ends of the two mounting half-frames are integrally formed with connecting clamping frames used in cooperation with the coiled steel rope, the bottom of each connecting clamping frame is provided with a connecting clamping groove, the coiled steel rope is movably clamped in the corresponding connecting clamping groove, the bottom of each connecting clamping frame is screw-mounted with a mounting bolt, the inner end of each mounting half-frame is fixedly mounted with a positioning clamping protrusion, the inner end of the other mounting half-frame is provided with a positioning clamping groove, and the positioning clamping protrusion is movably clamped in the corresponding positioning clamping groove.

[0013] A use method of a suspender maintenance device for a suspension bridge, comprising the following steps:

[0014] Step one: when a new suspender needs to be replaced, the lifting mechanism is placed outside the main cable through the first side frame and the second side frame, the outer clamping protrusion and the inner clamping protrusion are fixed by using the telescopic cylinder passing through the first groove and the second groove, so as to fix the first side frame and the second side frame, the outer surface of the main cable is contacted by the electric wheel, and then the lifting mechanism is installed on the main cable in the form of wheel positioning, the electric wheel is opened to drive the whole lifting mechanism to automatically move on the main cable, and the lifting mechanism is moved to the position where the suspender needs to be replaced.

[0015] Step two: at this time, one of the lifting members needs to cross the lock clamp at the position where the suspender needs to be replaced, so that the suspender to be replaced is placed between the two lifting members, the telescopic cylinder on the lifting member close to the lock clamp is controlled to be opened, the anti-skid convex disc is moved into the first groove through the second groove, and the outer clamping protrusion and the inner clamping protrusion are unfixed.

[0016] Then, the two rotary cylinders on the lifting member away from the lock clamp are synchronously opened to control the corresponding rotary vertical rods to be synchronously and reversely rotated, so as to drive the corresponding connecting brackets to be synchronously and reversely opened, drive the first side frame and the second side frame of the other lifting member to be separated, the electric wheel on the lifting member away from the lock clamp is controlled to be opened, the lifting mechanism is driven to automatically move on the main cable, and the outer clamping protrusion and the inner clamping protrusion on the lifting member close to the lock clamp cross the lock clamp at the position where the suspender needs to be replaced.

[0017] Then, the two rotary cylinders on the lifting member away from the lock clamp are synchronously opened to control the corresponding rotary vertical rods to be synchronously and reversely rotated, so as to drive the corresponding connecting brackets to be synchronously and reversely opened, drive the first side frame and the second side frame of the other lifting member to be separated, the electric wheel on the lifting member away from the lock clamp is controlled to be opened, the lifting mechanism is driven to automatically move on the main cable, and the outer clamping protrusion and the inner clamping protrusion on the lifting member close to the lock clamp cross the lock clamp at the position where the suspender needs to be replaced.

[0018] Step 3: Place the two installation half-frames on top of the old boom, and engage the two sides of the winding steel rope with the corresponding connecting slots. Use the installation bolts to fix the two installation half-frames together, thereby positioning and installing the boom through the two installation half-frames. Simultaneously, make the limiting connection between the installation half-frames and the winding steel ropes to fix the boom to the two winding steel ropes.

[0019] Step 4: Perform auxiliary connections between the tensioning mechanism and the main cable, and the spare lifting lugs of the formal steel beam bracket. Use bolts to fix two sets of fixing sleeves on both sides of the locking clamp to fix the two wire rope cables on both sides of the locking clamp. Connect the steel anchor box to the spare lifting lugs of the formal steel beam bracket using pins. This completes the auxiliary connection between the entire tensioning mechanism and the main cable, and the spare lifting lugs of the formal steel beam bracket. Use a through-hole jack to tension the steel strands to facilitate the subsequent disassembly of the old hangers and the installation of the new hangers.

[0020] Step 5: Remove the old boom from the locking clamp using special tools, hoist it using two winding steel ropes, then turn on the drive motor to drive the first winding shaft and the first winding shaft to rotate synchronously. By controlling the winding frames at both ends of the winding steel rope to rotate synchronously in opposite directions, the two ends of the winding steel rope are unwound synchronously. The winding steel rope and the installation mechanism move down, thereby controlling the entire old boom to move down for disassembly.

[0021] Step Six: Position the new boom on the installation mechanism. Control the synchronous reverse rotation of the winding frames at both ends of the winding steel rope to simultaneously wind up both ends of the winding steel rope. Move the winding steel rope and the installation mechanism upward to control the upward movement of the new boom. Gradually lift the top of the new boom onto the locking clamp for convenient installation. Install the bottom of the new boom to enable quick connection and lifting installation of the new boom. Install strain gauges on the new boom to monitor the stress during and after the boom replacement process.

[0022] After installation, the tensioning mechanism is disassembled and installed at the next old suspender position to assist in the disassembly of the next old suspender. At the same time, the entire lifting mechanism is controlled to move automatically on the main cable until the entire lifting mechanism is moved to the position of another suspender for auxiliary lifting.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. By setting up a tensioning mechanism, auxiliary connections are made between the main cable and the spare lifting lugs of the main steel beam bracket. By tensioning the steel strands, it is possible to replace suspension bridge suspenders that are short or have limited space under the main cable, thereby improving the efficiency of suspender replacement.

[0025] 2. By setting up wheel-type positioning installation between the lifting mechanism and the main cable, it can move automatically on the main cable, which facilitates the automatic lifting and disassembly of multiple booms in sequence. There is no need to use large external lifting equipment to lift the main cable, which is simple and convenient. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the present invention.

[0028] Figure 2 This is a schematic diagram of the tensioning mechanism in this invention.

[0029] Figure 3 This is a schematic diagram of the lifting mechanism in this invention.

[0030] Figure 4 This is a schematic diagram of the partial structural connection of the lifting mechanism in this invention.

[0031] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle.

[0032] Figure 6 This is a schematic diagram of the partial structural connection of the lifting mechanism in this invention.

[0033] Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle.

[0034] Figure 8 This is a schematic diagram of the lifting component in this invention.

[0035] Figure 9 This is a schematic diagram of the structural connection between the winding steel rope and the installation mechanism in this invention.

[0036] Figure 10 For the present invention Figure 9 A magnified view of point C in the middle.

[0037] In the diagram: 1. Tensioning mechanism; 11. Fixed sleeve; 12. Wire rope cable; 13. Spreader beam; 14. Steel strand; 15. Through-hole jack; 16. Steel anchor box; 2. Lifting mechanism; 3. Lifting component; 4. Installation mechanism; 6. Strain gauge; 21. Connecting bracket; 22. Rotating cam; 221. Rotating longitudinal bar; 222. Rotating cylinder; 23. Winding steel rope; 31. First side frame; 32. Second side frame; 33. Inner mounting seat; 331. Electric wheel; 34. Outer clamping cam 341. Inner locking protrusion; 342. Telescopic cylinder; 343. Anti-slip protrusion; 3401. First groove; 3402. Second groove; 35. Bottom auxiliary frame; 351. Auxiliary support frame; 36. First take-up shaft; 361. Second take-up shaft; 362. Common drive locking protrusion; 363. Common drive sleeve protrusion; 364. Drive motor; 37. Take-up frame; 41. Mounting half frame; 42. Connecting frame; 421. Connecting slot; 43. Mounting bolt; 44. Positioning locking protrusion; 441. Positioning slot. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example: Figures 1-10 As shown, the present invention provides a suspension bridge gantry maintenance device, including a tensioning mechanism 1, a lifting mechanism 2, and a strain gauge 6;

[0040] The tensioning mechanism 1 includes two sets of fixed sleeves 11. The tensioning mechanism 1 is bolted to the main cable of the suspension bridge via these two sets of fixed sleeves 11. The two fixed sleeves 11 are located on both sides of a locking clamp used for suspender installation on the suspension bridge. Each set of fixed sleeves 11 is equipped with a wire rope cable 12, thus fixing the two wire rope cables 12 to both sides of the locking clamp. The ends of the wire rope cables 12 are all cast anchor heads. A spreader beam 13 is installed at the same position on the ends of both wire rope cables 12. A steel strand 14 is movably inserted into the middle of each spreader beam 13. A through-hole jack 15 is fixedly installed in the middle of beam 13. The top of the steel strand 14 is fixedly installed at the tensioning end of the through-hole jack 15. The through-hole jack 15 is used to tension the steel strand 14. The bottom of the steel strand 14 is fixedly installed with a steel anchor box 16 through an anchor. The tensioning mechanism 1 is connected to the spare lifting lug of the main steel beam bracket through the steel anchor box 16 using a pin shaft. This is used to make auxiliary connections between the entire tensioning mechanism 1 and the main cable and the spare lifting lug of the main steel beam bracket. The lifting mechanism 2 is equipped with an installation mechanism 4. The strain gauge 6 is installed on the new lifting rod to monitor the stress during and after the replacement of the lifting rod.

[0041] The lifting mechanism 2 includes a connecting bracket 21, which has two symmetrically distributed sets. Each set of connecting brackets 21 has a lifting component 3 at both ends. The lifting component 3 includes a first side frame 31 and a second side frame 32, which are symmetrically distributed frame structures. The main cable is located between the first side frame 31 and the second side frame 32. Inner mounting seats 33 are fixedly installed on the inner sides of both the first side frame 31 and the second side frame 32. Electric wheels 331 are fixedly installed on the inner mounting seats 33, and the electric wheels 331 contact the outer surface of the main cable for wheel-type positioning between the lifting mechanism 2 and the main cable. An outer locking protrusion 34 is integrally formed on the top of the first side frame 31, and an inner locking protrusion 341 is integrally formed on the top of the second side frame 32. The outer locking protrusion 34 is movably engaged with the top of the second side frame 32, and the inner locking protrusion 341 is movably engaged with the top of the first side frame 31. A telescopic cylinder 342 is fixedly mounted in the middle of the outer locking protrusion 34. A first groove 3401 and a second groove 3402 are opened in the middle of the outer locking protrusion 34. The driving end of the telescopic cylinder 342 passes through the first groove 3401 and the second groove 3402 in sequence and is fixedly installed with an anti-slip convex plate 343. The lower surface of the anti-slip convex plate 343 contacts the outer surface of the main cable. The telescopic end of the telescopic cylinder 342 passes through the first groove 3401 and the second groove 3402 to fix the outer locking protrusion 34 and the inner locking protrusion 341, thereby fixing the first side frame 31 and the second side frame 32. In this way, the lifting mechanism 2 is wheel-positioned and installed on the main cable. Thus, by opening the electric wheel 331, the entire lifting mechanism 2 is driven to move automatically on the main cable, which facilitates the sequential auxiliary lifting and disassembly of multiple sets of suspenders on the main cable without the need for external large lifting equipment to lift the main cable.

[0042] A base frame 35 is fixedly installed on the outer bottom of both the first side frame 31 and the second side frame 32. A first take-up shaft 36 is rotatably mounted on one base frame 35, and a second take-up shaft 361 is rotatably mounted on the other base frame 35. Auxiliary support frames 351 are rotatably mounted on opposite ends of the first take-up shaft 36 and the second take-up shaft 361. The auxiliary support frames 351 are fixedly installed on the first side frame 31 and the second side frame 32 respectively to facilitate the stable rotation of the first take-up shaft 36 and the second take-up shaft 361. A winding frame 37 is fixedly installed on the outer side of 1, and a winding steel rope 23 is provided below the connecting bracket 21. The two ends of the winding steel rope 23 are respectively wound on the corresponding winding frames 37 on both sides. By controlling the winding frames 37 at both ends of the winding steel rope 23 to rotate synchronously in opposite directions, the two ends of the winding steel rope 23 are wound synchronously, and the middle of the winding steel rope 23 moves upward. Conversely, by controlling the winding frames 37 at both ends of the winding steel rope 23 to rotate synchronously in opposite directions, the two ends of the winding steel rope 23 are unwound synchronously, and the middle of the winding steel rope 23 moves downward.

[0043] The end of the first take-up shaft 36 is integrally formed with a common drive locking protrusion 362, and the end of the second take-up shaft 361 is integrally formed with a common drive sleeve protrusion 363. The common drive locking protrusion 362 is movably engaged in the common drive sleeve protrusion 363. A drive motor 364 is fixedly installed on one of the bottom brackets 35. The drive end of the drive motor 364 is fixedly installed with the shaft end of the first take-up shaft 36. By turning on the drive motor 364, the first take-up shaft 36 is driven to rotate synchronously.

[0044] Both ends of the connecting bracket 21 are integrally formed with rotating protrusions 22. A rotating longitudinal rod 221 is vertically installed in the middle of the rotating protrusion 22. The rotating longitudinal rods 221 are rotatably installed on the outer top of the first side frame 31 and the second side frame 32 respectively. A rotating cylinder 222 is fixedly installed on the outer top of the first side frame 31 and the second side frame 32. The driving end of the rotating cylinder 222 is fixedly installed on the top of the corresponding rotating longitudinal rod 221. By simultaneously opening the two rotating cylinders 222 on one of the lifting parts 3, the corresponding rotating longitudinal rod 221 is controlled to rotate synchronously in the opposite direction, thereby driving the corresponding connecting bracket 21 to open synchronously in the opposite direction, and driving the first side frame 31 and the second side frame 32 in the other lifting part 3 to separate. Conversely, by simultaneously opening the two rotating cylinders 222 on one of the lifting parts 3, the corresponding rotating longitudinal rod 221 is controlled to rotate synchronously in opposite directions, thereby driving the corresponding connecting bracket 21 to close synchronously in opposite directions, and driving the first side frame 31 and the second side frame 32 in the other lifting part 3 to close.

[0045] The installation mechanism 4 includes two symmetrically distributed installation half-frames 41. The top of the boom is movably engaged between the two installation half-frames 41. The opposite ends of the two installation half-frames 41 are integrally formed with connecting clip frames 42 for use with the winding steel rope 23. The bottom of the connecting clip frame 42 is provided with a connecting clip groove 421. The winding steel rope 23 is movably engaged in the corresponding connecting clip groove 421. The bottom of the connecting clip frame 42 is threaded with an installation bolt 43 for bolt fixing between the two installation half-frames 41. Thus, the boom is positioned and installed through the two installation half-frames 41, and the limiting connection between the installation half-frames 41 and the winding steel rope 23 is performed simultaneously, thereby fixing the boom to the two winding steel ropes 23 for subsequent lifting of the boom. The inner end of one installation half-frame 41 is fixedly installed with a positioning protrusion 44, and the inner end of the other installation half-frame 41 is provided with a positioning groove 441. The positioning protrusion 44 is movably engaged in the corresponding positioning groove 441 for positioning connection between the two installation half-frames 41.

[0046] A method for using a suspension bridge gantry maintenance device includes the following steps:

[0047] Step 1: When a new boom needs to be replaced, place the lifting mechanism 2 on the outside of the main cable through the first side frame 31 and the second side frame 32. Use the telescopic cylinder 342 to pass through the first groove 3401 and the second groove 3402 to fix the outer locking protrusion 34 and the inner locking protrusion 341, thereby fixing the first side frame 31 and the second side frame 32. The electric wheel 331 contacts the outer surface of the main cable, thus positioning the lifting mechanism 2 on the main cable in a wheel-like manner. By activating the electric wheel 331, the entire lifting mechanism 2 is driven to move automatically on the main cable until the entire lifting mechanism 2 is moved to the position where the boom needs to be replaced.

[0048] Step 2: At this time, one of the lifting parts 3 needs to cross the locking clamp at the position of the replacement lifting rod so that the replacement lifting rod is placed between the two lifting parts 3. By controlling the opening of the telescopic cylinder 342 on the lifting part 3 near the locking clamp, the anti-slip convex plate 343 is moved through the second groove 3402 into the first groove 3401, and the outer locking convex plate 34 and the inner locking convex plate 341 lose their fixation.

[0049] Subsequently, the two rotary cylinders 222 on the lifting member 3 located away from the locking clamp are simultaneously activated to control the corresponding rotating rods 221 to rotate synchronously in the opposite direction, thereby driving the corresponding connecting brackets 21 to open synchronously in the opposite direction, causing the first side frame 31 and the second side frame 32 in the other lifting member 3 to separate, making it easier to control the opening of the electric wheel 331 on the lifting member 3 located away from the locking clamp, driving the entire lifting mechanism 2 to move automatically on the main cable, and the outer locking protrusion 34 and the inner locking protrusion 341 on the lifting member 3 located near the locking clamp to cross the locking clamp at the position of the replacement lifting rod;

[0050] Subsequently, the two rotary cylinders 222 on the lifting member 3 located away from the locking clamp are simultaneously activated to control the corresponding rotary rods 221 to rotate synchronously in opposite directions, thereby driving the corresponding connecting brackets 21 to close synchronously in opposite directions, driving the first side frame 31 and the second side frame 32 in the other lifting member 3 to close and reset, and controlling the extension cylinder 342 on the lifting member 3 located near the locking clamp to extend, so that the extension end passes through the first groove 3401 and the second groove 3402 to fix the outer locking protrusion 34 and the inner locking protrusion 341, thereby fixing the first side frame 31 and the second side frame 32 again and increasing stability. At this time, the replacement lifting rod is placed between the two lifting members 3.

[0051] Step 3: Place the two installation half-frames 41 on top of the old boom, and movably engage the two side winding steel ropes 23 in the corresponding connecting slots 421. Use the installation bolts 43 to fix the two installation half-frames 41 together, thereby positioning and installing the boom through the two installation half-frames 41, and simultaneously perform the limiting connection between the installation half-frames 41 and the winding steel ropes 23, thus fixing the boom to the two winding steel ropes 23.

[0052] Step 4: Make auxiliary connections between the tensioning mechanism 1 and the main cable and the spare lifting lugs of the formal steel beam bracket. Fix two sets of fixing sleeves 11 on both sides of the locking clamp with bolts to fix the two wire rope cables 12 on both sides of the locking clamp. Connect the steel anchor box 16 to the spare lifting lugs of the formal steel beam bracket with pins to make auxiliary connections between the entire tensioning mechanism 1 and the main cable and the spare lifting lugs of the formal steel beam bracket. Use the through-hole jack 15 to tension the steel strand 14 to facilitate the subsequent disassembly of the old hanger and installation of the new hanger.

[0053] Step 5: Remove the old boom from the locking clamp using special tools, hoist it using two winding steel ropes 23, then turn on the drive motor 364 to drive the first winding shaft 36 and the first winding shaft 36 to rotate synchronously. By controlling the winding frames 37 at both ends of the winding steel rope 23 to rotate synchronously in opposite directions, the two ends of the winding steel rope 23 are unwound synchronously. The winding steel rope 23 and the installation mechanism 4 move down, thereby controlling the entire old boom to move down for disassembly.

[0054] Step 6: Position the new boom on the installation mechanism 4. Control the winding frames 37 at both ends of the winding steel rope 23 to rotate synchronously in opposite directions, and simultaneously wind up both ends of the winding steel rope 23. The winding steel rope 23 and the installation mechanism 4 move upward, thereby controlling the new boom to move upward, so that the top of the new boom is gradually lifted and moved to the locking clamp for convenient installation. The bottom of the new boom is then installed to perform quick connection and lifting installation of the new boom. The strain gauge 6 is installed on the new boom to monitor the stress during and after the boom replacement process.

[0055] After installation, the tensioning mechanism 1 is disassembled and installed at the position of the next old suspender for auxiliary disassembly of the next old suspender. At the same time, the entire lifting mechanism 2 is controlled to move automatically on the main cable until the entire lifting mechanism 2 is moved to the position of another suspender for auxiliary lifting.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A suspension bridge gantry maintenance device, comprising a tensioning mechanism (1), a lifting mechanism (2), and a strain gauge (6), characterized in that: The tensioning mechanism (1) includes two sets of fixed sleeves (11). The tensioning mechanism (1) is bolted to the main cable of the suspension bridge via the two sets of fixed sleeves (11). Each set of fixed sleeves (11) is equipped with a wire rope cable (12). The ends of the wire rope cables (12) are all made of cast anchor head structure. A spreader beam (13) is installed at the same position on the ends of the two wire rope cables (12). A steel strand (14) is movably inserted into the middle of the spreader beam (13). The middle part of the spreader beam (13) is fixedly installed with a through-hole jack (15), the top end of the steel strand (14) is fixedly installed at the tensioning end of the through-hole jack (15), the bottom end of the steel strand (14) is fixedly installed with a steel anchor box (16) through an anchor, the tensioning mechanism (1) is connected to the spare lifting lug of the formal steel beam bracket through the steel anchor box (16) using a pin, the lifting mechanism (2) is provided with an installation mechanism (4), and the strain gauge (6) is installed on the new lifting rod to monitor the stress during and after the replacement of the lifting rod.

2. The suspension bridge gantry maintenance device according to claim 1, characterized in that: The lifting mechanism (2) includes a connecting bracket (21), which has two symmetrically distributed sets. Both ends of the two sets of connecting brackets (21) are provided with lifting components (3). The lifting component (3) includes a first side frame (31) and a second side frame (32). The first side frame (31) and the second side frame (32) are symmetrically distributed frame structures. The main cable is located between the first side frame (31) and the second side frame (32). An inner mounting seat (33) is fixedly installed on the inner side of both the first side frame (31) and the second side frame (32). An electric wheel (331) is fixedly installed on each inner mounting seat (33). The electric wheel (331) contacts the outer surface of the main cable. The top of the first side frame (31)... The main body has an outer locking protrusion (34), and the top of the second side frame (32) has an inner locking protrusion (341). The outer locking protrusion (34) is movably locked to the top of the second side frame (32), and the inner locking protrusion (341) is movably locked to the top of the first side frame (31). A telescopic cylinder (342) is fixedly mounted in the middle of the outer locking protrusion (34). A first groove (3401) and a second groove (3402) are opened in the middle of the outer locking protrusion (34). The driving end of the telescopic cylinder (342) passes through the first groove (3401) and the second groove (3402) in sequence and is fixedly mounted with an anti-slip convex plate (343). The lower surface of the anti-slip convex plate (343) is in contact with the outer surface of the main cable.

3. A suspension bridge gantry maintenance device according to claim 2, characterized in that: A base frame (35) is fixedly installed on the outer bottom of the first side frame (31) and the second side frame (32). A first winding shaft (36) is rotatably installed on one of the base frames (35), and a second winding shaft (361) is rotatably installed on the other base frame (35). A winding frame (37) is fixedly installed on the outer side of the first winding shaft (36) and the second winding shaft (361). A winding steel rope (23) is provided below the connecting bracket (21). The two ends of the winding steel rope (23) are respectively wound on the corresponding winding frames (37) on both sides.

4. A suspension bridge gantry maintenance device according to claim 3, characterized in that: The first winding shaft (36) and the second winding shaft (361) are each rotatably mounted with an auxiliary support frame (351) at their opposite ends. The auxiliary support frame (351) is fixedly mounted on the first side frame (31) and the second side frame (32), respectively.

5. A suspension bridge gantry maintenance device according to claim 4, characterized in that: The end of the first take-up shaft (36) is integrally formed with a common drive locking protrusion (362), and the end of the second take-up shaft (361) is integrally formed with a common drive sleeve protrusion (363). The common drive locking protrusion (362) is movably engaged in the common drive sleeve protrusion (363).

6. A suspension bridge gantry maintenance device according to claim 5, characterized in that: A drive motor (364) is fixedly installed on one of the base frames (35), and the drive end of the drive motor (364) is fixedly installed on the shaft end of the first take-up shaft (36).

7. A suspension bridge gantry maintenance device according to claim 6, characterized in that: Both ends of the connecting bracket (21) are integrally formed with rotating protrusions (22), and a rotating longitudinal rod (221) is vertically installed in the middle of the rotating protrusion (22). The rotating longitudinal rod (221) is rotatably installed on the outer top of the first side frame (31) and the second side frame (32).

8. A suspension bridge gantry maintenance device according to claim 7, characterized in that: A rotary cylinder (222) is fixedly installed on the outer top of both the first side frame (31) and the second side frame (32). The drive end of the rotary cylinder (222) and the top end of the corresponding rotary rod (221) are fixedly installed.

9. A suspension bridge gantry maintenance device according to claim 8, characterized in that: The installation mechanism (4) includes two symmetrically distributed installation half-frames (41). The top of the boom is movably engaged between the two installation half-frames (41). The opposite ends of the two installation half-frames (41) are integrally formed with a connecting frame (42) for use with the winding steel rope (23). The bottom of the connecting frame (42) is provided with a connecting slot (421). The winding steel rope (23) is movably engaged in the corresponding connecting slot (421). The bottom of the connecting frame (42) is threaded with an installation bolt (43). The inner end of one of the installation half-frames (41) is fixedly installed with a positioning protrusion (44), and the inner end of the other installation half-frame (41) is provided with a positioning slot (441). The positioning protrusion (44) is movably engaged in the corresponding positioning slot (441).

10. A method of using the suspension bridge gantry maintenance device according to claim 9, characterized in that, Includes the following steps: Step 1: When a new boom needs to be replaced, place the lifting mechanism (2) on the outside of the main cable through the first side frame (31) and the second side frame (32), and use the telescopic cylinder (342) to pass through the first groove (3401) and the second groove (3402) to fix the outer locking protrusion (34) and the inner locking protrusion (341), thereby fixing the first side frame (31) and the second side frame (32). The electric wheel (331) contacts the outer surface of the main cable, thereby positioning the lifting mechanism (2) on the main cable in a wheel-type position. By turning on the electric wheel (331), the entire lifting mechanism (2) is driven to move automatically on the main cable until the entire lifting mechanism (2) is moved to the position where the boom needs to be replaced. Step 2: At this time, one of the lifting parts (3) needs to cross the locking clamp at the position of the replacement lifting rod so that the replacement lifting rod is placed between the two lifting parts (3). By controlling the extension and retraction of the telescopic cylinder (342) on the lifting part (3) near the locking clamp, the anti-slip convex plate (343) is moved through the second groove (3402) to the first groove (3401), and the outer locking convex plate (34) and the inner locking convex plate (341) lose their fixation. Subsequently, the two rotary cylinders (222) on the lifting member (3) located away from the locking clamp are opened simultaneously to control the corresponding rotating rod (221) to rotate in the opposite direction, thereby driving the corresponding connecting bracket (21) to open in the opposite direction, and causing the first side frame (31) and the second side frame (32) in the other side lifting member (3) to separate, so as to facilitate the control of opening the electric wheel (331) on the lifting member (3) located away from the locking clamp, driving the entire lifting mechanism (2) to move automatically on the main cable, and the outer locking protrusion (34) and inner locking protrusion (341) on the lifting member (3) located near the locking clamp cross the locking clamp at the position of the replacement lifting rod; Subsequently, the two rotary cylinders (222) on the lifting member (3) located away from the locking clamp are opened simultaneously to control the corresponding rotary rods (221) to rotate synchronously in opposite directions, thereby driving the corresponding connecting brackets (21) to close synchronously in opposite directions, driving the first side frame (31) and the second side frame (32) in the other lifting member (3) to close and reset, and controlling the extension cylinder (342) on the lifting member (3) located near the locking clamp to extend, so that the extension end passes through the first groove (3401) and the second groove (3402) to fix the outer locking protrusion (34) and the inner locking protrusion (341), thereby fixing the first side frame (31) and the second side frame (32) again to increase stability. At this time, the replacement lifting rod is placed between the two lifting members (3); Step 3: Place the two installation half-frames (41) on top of the old boom, and movably engage the two sides of the winding steel rope (23) in the corresponding connecting slots (421). Use the installation bolts (43) to fix the two installation half-frames (41) together, thereby positioning and installing the boom through the two installation half-frames (41), and simultaneously perform the limiting connection between the installation half-frames (41) and the winding steel rope (23), thereby fixing the boom onto the two winding steel ropes (23). Step 4: Make auxiliary connections between the tensioning mechanism (1) and the main cable and the spare lifting lug of the formal steel beam bracket. Fix two sets of fixed sleeves (11) on both sides of the locking clamp with bolts to fix the two wire rope cables (12) on both sides of the locking clamp. Connect the steel anchor box (16) to the spare lifting lug of the formal steel beam bracket with a pin to make auxiliary connections between the entire tensioning mechanism (1) and the main cable and the spare lifting lug of the formal steel beam bracket. Use a through-hole jack (15) to tension the steel strand (14) to facilitate the subsequent disassembly of the old lifting rod and installation of the new lifting rod. Step 5: Remove the old boom from the locking clamp using a special tool and hoist it using two winding steel ropes (23). Then, turn on the drive motor (364) to drive the first winding shaft (36) and the first winding shaft (36) to rotate synchronously. By controlling the winding frames (37) at both ends of the winding steel rope (23) to rotate synchronously in opposite directions, the two ends of the winding steel rope (23) are unwound synchronously. The winding steel rope (23) and the installation mechanism (4) move down, thereby controlling the entire old boom to move down for disassembly. Step 6: Position the new boom on the installation mechanism (4). Control the winding frames (37) at both ends of the winding steel rope (23) to rotate synchronously in opposite directions, and simultaneously wind up both ends of the winding steel rope (23). The winding steel rope (23) and the installation mechanism (4) move upward, thereby controlling the new boom to move upward, so that the top of the new boom is gradually lifted and moved to the locking clamp for convenient installation. The bottom of the new boom is installed, thereby carrying out quick connection and lifting installation of the new boom. The strain gauge (6) is installed on the new boom to monitor the stress during and after the boom replacement process. After installation, the tensioning mechanism (1) is disassembled and installed at the position of the next old suspender for auxiliary disassembly of the next old suspender. At the same time, the entire lifting mechanism (2) is controlled to move automatically on the main cable until the lifting mechanism (2) is moved to the position of another suspender for auxiliary lifting.

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