Suspension bridge catwalk bearing cable bracket structure

Abstract

The utility model discloses a suspension bridge catwalk bearing cable bracket structure which comprises a bracket bearing cable and a plurality of brackets, the two ends of the bracket bearing cable are connected to two tower columns of a suspension bridge respectively, and each bracket is provided with a driving mechanism and a pulley rotationally arranged on the bracket and driven by the driving mechanism. The bracket bearing cable bears the pulley and is in rolling fit with the pulley; the brackets are driven by the driving mechanism to slide along the bracket bearing cable through the pulleys, and the multiple brackets sequentially slide in the direction from the two ends of the bracket bearing cable to the middle of the bracket bearing cable. According to the utility model, the driving mechanism is directly arranged on the bracket, and the single pulley and the bracket bearing cable are in one-to-one corresponding rolling fit, so that the bracket can slide along the bracket bearing cable in the initial stage by virtue of the gravity of the bracket; when the bracket slides to a smooth position close to the middle of the bracket bearing cable, the driving mechanism drives the pulley to rotate so as to drive the bracket to move to a proper position, and the construction cost can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering construction, in particular to a load-bearing cable bracket structure of a catwalk of a suspension bridge. Background Art

[0002] The catwalk is an important temporary aerial passage in the construction of suspension bridges. The catwalk is an operating platform that runs through the construction processes of main cable erection, cable tightening, hanger and cable clamp installation, steel box girder hoisting, main cable winding and anti-corrosion painting; and the catwalk load-bearing cables are the most important load-bearing structure of the catwalk.

[0003] The installation of catwalk load-bearing cables is a key process in the upper construction of suspension bridges. At present, the construction of catwalk load-bearing cables generally adopts the bracket method. After the bracket load-bearing cables are erected between the two towers of the suspension bridge and the bracket is installed on the bracket load-bearing cables, the bracket is used to pull the catwalk load-bearing cables from one of the towers of the suspension bridge to the other tower. The bracket is an important component in the construction of catwalk load-bearing cables.

[0004] The Chinese utility model patent with announcement number CN206986722U discloses a bracket device for catwalk load-bearing cable traction, including a bracket bracket, a bracket positioning cable and a catwalk load-bearing cable, the bracket bracket is provided with two bracket pulleys and a roller; the two bracket pulleys are respectively fixed on both sides above the bracket bracket, the bracket positioning cable is fixed on the outside of the bracket pulley, and the bracket load-bearing cable is passed through the bracket pulley; the roller is fixed in the center of the bracket bracket, and the catwalk load-bearing cable is mounted on the roller. In this utility model, a tower crane is used to lift the bracket to the Bailey working platform on the top of the tower, the lowermost pulley of the bracket pulley is removed, and the bracket load-bearing cable is placed in the pulley, and the winches on both sides are started to lower the bracket to the specified position. During the lowering process, the bracket slides on the bracket load-bearing cable.

[0005] The bracket bracket adopted in the technical solution of the above patent needs to be configured with a bracket pulley with three pulleys, and the setting positions of the three pulleys are limited. It is necessary to ensure that two of the pulleys are at the same height, and the third pulley is located in the middle part below the other two pulleys. Therefore, the structure of the bracket pulley is relatively complicated; and when installing the bracket, the bracket bracket must be towed by a winch throughout the whole process to move the bracket bracket to a suitable position. The whole installation process is relatively cumbersome, which is not conducive to reducing construction costs and construction periods, and has poor economy. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a suspension bridge catwalk load-bearing cable bracket structure with a simple structure and a short erection construction period.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is: a suspension bridge catwalk load-bearing cable bracket structure, including a bracket load-bearing cable and a plurality of brackets, the two ends of the bracket load-bearing cable are respectively connected to the two towers of the suspension bridge, the bracket is provided with a driving mechanism and a pulley rotatably arranged on the bracket and driven by the driving mechanism, the bracket load-bearing cable carries the pulley and rolls with the pulley; the bracket slides along the bracket load-bearing cable through the pulley under the drive of the driving mechanism, and the plurality of brackets slide in sequence from the two ends of the bracket load-bearing cable to the middle of the bracket load-bearing cable.

[0008] As an improvement of the above scheme: the driving mechanism includes a driving motor, a conveyor belt and a transmission shaft, and an auxiliary bracket is also fixed on the bracket; the driving motor is fixed on the bracket, and the pulley is rotatably connected between the bracket and the auxiliary bracket through the transmission shaft, and the transmission shaft forms a transmission match with the driving motor through the conveyor belt.

[0009] As an improvement of the above solution: it also includes a bracket positioning rope. The bracket positioning rope is connected between the two tower columns, and the bracket positioning rope forms a limiting fit with the auxiliary brackets on each bracket.

[0010] As an improvement of the above solution: at least one limiting hook is fixed on the auxiliary bracket, and the bracket positioning rope passes through the limiting hook to form a limiting fit.

[0011] As an improvement of the above solution: two limit hooks are fixed on the auxiliary bracket, the openings of the limit hooks face downward, and the two limit hooks are spaced apart on the same horizontal line.

[0012] As an improvement of the above solution: the outer diameter of the pulley gradually decreases from both ends to the middle, and a limiting groove that cooperates with the bracket load-bearing cable is formed on the outer peripheral surface of the pulley.

[0013] As an improvement of the above scheme: a connecting plate is fixed at the lower end of the auxiliary bracket, and a limiting plate is fixed in the middle of the auxiliary bracket; the end of the connecting plate that is not connected to the auxiliary bracket is inclined toward the bracket and fixedly connected to the bracket, and the limiting plate is located below the bracket load-bearing cable and forms a limiting fit with the bracket load-bearing cable in the vertical direction.

[0014] The beneficial effect of the utility model is as follows: the utility model improves the structure of the bracket for pulling the catwalk load-bearing cable, directly sets a driving mechanism on the bracket, and uses a single pulley to form a one-to-one rolling fit with the bracket load-bearing cable, and at the same time adopts a method of installing the bracket by pulling from both ends of the bracket load-bearing cable to the middle. In the initial stage, the bracket can slide along the bracket load-bearing cable by relying on its own gravity. When the bracket slides to a flat position close to the middle of the bracket load-bearing cable, the driving mechanism drives the pulley to rotate to drive the bracket to move to a suitable position, thereby effectively reducing the power consumption of the bracket when moving on the bracket load-bearing cable, and can effectively reduce construction costs. At the same time, both ends of the bracket load-bearing cable are used as starting points for the movement of the bracket, the distance that all brackets need to move is shortened, and the overall construction period is effectively shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the coordination between the bracket load-bearing cable and the bracket;

[0017] Figure 3 It is an enlarged schematic diagram of the fitting point between the bracket load-bearing cable and the support.

[0018] Markings in the figure are: 100-bracket load-bearing cable, 200-bracket, 300-driving mechanism, 310-driving motor, 320-conveyor belt, 330-transmission shaft, 400-pulley, 500-auxiliary bracket, 510-limiting hook, 520-connecting plate, 530-limiting plate, 600-bracket positioning rope. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the present invention, the present invention is further described below in conjunction with the accompanying drawings.

[0020] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "front", "rear", "left", "right", "up", "down", and "inside" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of description. They do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0021] like Figures 1 to 3As shown, the suspension bridge catwalk load-bearing cable bracket structure disclosed by the utility model includes a bracket load-bearing cable 100 and a bracket 200. The bracket load-bearing cable 100 is used to erect the bracket 200. Before erecting the bracket 200, the bracket load-bearing cable 100 is first fixedly connected between the two towers of the suspension bridge, so that the two ends of the bracket load-bearing cable 100 are respectively anchored on the ear plates on the top of the two towers; the bracket 200 is used to pull the catwalk load-bearing cable that is subsequently erected. After the bracket load-bearing cable 100 is erected, multiple brackets 200 are arranged along the bracket load-bearing cable 100, and the catwalk load-bearing cable is installed between the two towers of the suspension bridge using the traction effect of the bracket 200.

[0022] The bracket 200 used in the utility model is provided with a driving mechanism 300 and a pulley 400. Because the number of the bracket load-bearing cables 100 is two in order to ensure force balance and stability, two pulleys 400 are installed on each bracket 200, and a rotatable pulley 400 is installed at each end of the bracket 200, and the two pulleys 400 correspond to the two bracket load-bearing cables 100. The driving mechanism 300 and the pulley 400 are in a one-to-one correspondence. The pulley 400 is driven to rotate by the driving mechanism 300, and the bracket load-bearing cable 100 directly carries the pulley 400 to realize the bearing of the entire bracket 200. The pulley 400 and the bracket load-bearing cable 100 are rollingly matched so that the pulley 400 can drive the entire bracket 200 to slide along the bracket load-bearing cable 100 by rolling along the bracket load-bearing cable 100, so as to realize the movement of the bracket 200 on the bracket load-bearing cable 100. The utility model can cooperate with the bracket load-bearing cable 100 through a pulley 400, and according to the catenary line characteristics of the bracket load-bearing cable 100 with both ends rising and the middle part bending down when the bracket load-bearing cable 100 is suspended, the bracket 200 can slide by itself by its own gravity at the initial stage of the erection work. Only when it slides to a position where the curvature is relatively gentle near the middle of the bracket load-bearing cable 100, the bracket 200 cannot complete the sliding by its own gravity. At this time, the driving mechanism 300 is started by remote control to drive the pulley 400 to rotate to drive the bracket 200 to move to a suitable position and complete the last section of the journey. In summary, the utility model uses a simple driving coordination structure to simplify the overall structure of the bracket 200 while effectively reducing the consumption of driving power, thereby effectively saving the erection construction cost.

[0023] In order to ensure the stability of the pulley 400 sliding along the bracket load-bearing cable 100 and prevent deflection during the sliding process, the present invention optimizes the structure of the pulley 400, such as Figure 3 As shown, the outer diameter of the pulley 400 is gradually reduced from both ends toward the middle, and a limit groove is formed on the outer circumferential surface of the pulley 400 to limit the bracket load-bearing cable 100. The annular limit groove on the outer circumferential surface of the pulley 400 forms a limit fit with the bracket load-bearing cable 100 to prevent the pulley 400 from deviating left or right during sliding.

[0024] In the utility model, the starting position of the movement of the bracket 200 is set at the two ends of the bracket load-bearing cable 100, that is, the bracket 200 is lowered at both ends of the bracket load-bearing cable 100, so that multiple brackets 200 slide in sequence from the two ends of the bracket load-bearing cable 100 toward the middle of the bracket load-bearing cable 100. Compared with the solution of erecting a bracket from one end of the bracket load-bearing cable in the prior art, the utility model can effectively shorten the distance that the bracket needs to move, thereby saving 50% of the construction period.

[0025] Specifically, Figure 2 and Figure 3 As shown, the driving mechanism 300 in the utility model includes a driving motor 310, a conveyor belt 320 and a transmission shaft 330. At the same time, an auxiliary bracket 500 is also arranged on the bracket 200; the driving motor 310 is fixed on the bracket 200, and the pulley 400 is rotatably installed between the bracket 200 and the auxiliary bracket 500 through the transmission shaft 330. The output end of the driving motor 310 and the transmission shaft 330 form a transmission match through the conveyor belt 320. After the driving motor 310 is started, it can drive the transmission shaft 330 to rotate through the conveyor belt 320, and finally realize the driving of the pulley 400.

[0026] Furthermore, the present invention also provides a bracket positioning rope 600, such as Figures 1 to 3 As shown, the bracket positioning rope 600 is fixedly connected between the two towers of the suspension bridge, and the bracket positioning rope 600 forms a limiting match with the auxiliary bracket 500 on each bracket 200. Specifically, at least one limiting hook 510 is fixed on the auxiliary bracket 500, and the bracket positioning rope 600 passes through the limiting hook 510 to form a limiting match. Through the cooperation of the bracket positioning rope 600 and the limiting hook 510, the erection position of each bracket 200 can be positioned, and in order to improve the positioning effect, the utility model increases the number of the limiting hooks 510 on each auxiliary bracket 500, and two limiting hooks 510 are fixed on the auxiliary bracket 500, the opening of the limiting hook 510 faces downward, and the two limiting hooks 510 are spaced apart on the same horizontal line; then the part of the bracket positioning rope 600 located between the two limiting hooks 510 can be kept in a horizontal state, which plays a better limiting role on the bracket 200, so that the bracket 200 maintains good stability.

[0027] like Figure 3As shown, in the present invention, a connecting plate 520 is fixed at the lower end of the auxiliary bracket 500, and a limiting plate 530 is fixed at the middle of the auxiliary bracket 500. The end of the connecting plate 520 that is not connected to the auxiliary bracket 500 is tilted toward the bracket 200 and fixedly connected to the bracket 200. By adding the connecting plate 520, a stable triangular support decoupling strand is formed at the lower part of the auxiliary bracket 500, thereby improving the installation strength and stability of the auxiliary bracket 500; the limiting plate 530 is located below the bracket load-bearing cable 100 and forms a limiting fit with the bracket load-bearing cable 100 in the vertical direction. The limiting effect of the limiting plate 530 on the bracket load-bearing cable 100 is used to avoid a large amplitude of shaking in the vertical direction between the bracket 200 and the bracket load-bearing cable 100 due to the interaction force, thereby improving the stability of the two.

[0028] When the catwalk load-bearing cable bracket structure of the suspension bridge catwalk of the utility model is used to install the catwalk load-bearing cable, the following steps are followed:

[0029] S1, pulling the bracket load-bearing cable 100, anchoring the two ends of the bracket load-bearing cable 100 to the ear plates at the top of the tower columns on both sides of the suspension bridge, and completing the installation and fixation of the bracket load-bearing cable 100;

[0030] S2, releasing the bracket positioning rope 600 from the gantry at the top of the tower;

[0031] S3, using a tower crane to hoist the bracket 200 to the top of the tower column, and placing the bracket load-bearing cables 100 under the pulleys 400 on both sides of the bracket 200, that is, placing the pulleys 400 on the corresponding bracket load-bearing cables 100;

[0032] S4, passing the bracket positioning rope 600 through the corresponding limiting hook 510 on the bracket 200, and fixing the limiting hook 510 and the bracket positioning rope 600 with a rope clamp;

[0033] S5, slide the multiple brackets 200 down from both ends of the bracket load-bearing cable 100 in sequence, and use the gravity of the bracket 200 to drive the bracket 200 to slide along the bracket load-bearing cable 100 at the parts with larger curvature at both ends of the bracket load-bearing cable 100;

[0034] S6. When the bracket 200 moves to the part where the curvature of the bracket load-bearing cable 100 is smaller, the driving motor 310 is started, and the pulley 400 is driven to rotate through the conveyor belt 320 and the transmission shaft 330, so as to drive the bracket 200 to move to the verification position;

[0035] S7, repeating the above steps S3 to S6, the two ends of the bracket load-bearing cable 100 simultaneously carry out the installation of the bracket 200 until all the brackets 200 are moved into place;

[0036] S8, after the bracket 200 is erected, the catwalk load-bearing cable is pulled by the bracket 200;

[0037] S9. After the catwalk load-bearing rope is pulled, the bracket positioning rope 600 is retracted, and the bracket 200 is driven back to its original position, and then the bracket 200 is disassembled to enter the subsequent construction process.

Claims

1. A suspension bridge catwalk load-bearing cable bracket structure, comprising a bracket load-bearing cable (100) and a plurality of brackets (200), wherein both ends of the bracket load-bearing cable (100) are respectively connected to two towers of the suspension bridge, and characterized in that: The bracket (200) is provided with a driving mechanism (300) and a pulley (400) rotatably arranged on the bracket (200) and driven by the driving mechanism (300); the bracket load-bearing cable (100) carries the pulley (400) and rolls with the pulley (400); The bracket (200) is driven by the driving mechanism (300) to slide along the bracket load-bearing cable (100) through the pulley (400), and the plurality of brackets (200) slide in sequence from the two ends of the bracket load-bearing cable (100) to the middle of the bracket load-bearing cable (100).

2. The load-bearing cable bracket structure of the catwalk of a suspension bridge according to claim 1, characterized in that: The driving mechanism (300) comprises a driving motor (310), a conveyor belt (320) and a transmission shaft (330); an auxiliary bracket (500) is also fixed on the bracket (200); the driving motor (310) is fixed on the bracket (200); the pulley (400) is rotatably connected between the bracket (200) and the auxiliary bracket (500) via the transmission shaft (330); the transmission shaft (330) forms a transmission match with the driving motor (310) via the conveyor belt (320).

3. The load-bearing cable bracket structure of the catwalk of a suspension bridge according to claim 2, characterized in that: It also includes a bracket positioning rope (600), which is connected between two tower columns. The bracket positioning rope (600) forms a limiting fit with the auxiliary bracket (500) on each bracket (200).

4. The load-bearing cable bracket structure of the catwalk of a suspension bridge according to claim 3, characterized in that: At least one limiting hook (510) is fixed on the auxiliary bracket (500), and the bracket positioning rope (600) passes through the limiting hook (510) to form a limiting fit.

5. The load-bearing cable bracket structure of the catwalk of a suspension bridge according to claim 4, characterized in that: Two limiting hooks (510) are fixed on the auxiliary bracket (500), the openings of the limiting hooks (510) face downward, and the two limiting hooks (510) are spaced apart and arranged on the same horizontal line.

6. The load-bearing cable bracket structure of the catwalk of a suspension bridge according to claim 1, characterized in that: The outer diameter of the pulley (400) gradually decreases from both ends toward the middle, and a limiting groove is formed on the outer peripheral surface of the pulley (400) to limit the position of the bracket load-bearing rope (100).

7. The load-bearing cable bracket structure of the catwalk of a suspension bridge according to claim 2, characterized in that: A connecting plate (520) is fixed at the lower end of the auxiliary bracket (500), and a limiting plate (530) is fixed in the middle of the auxiliary bracket (500); the end of the connecting plate (520) that is not connected to the auxiliary bracket (500) is tilted toward the bracket (200) and is fixedly connected to the bracket (200), and the limiting plate (530) is located below the bracket load-bearing cable (100) and forms a limiting fit with the bracket load-bearing cable (100) in the vertical direction.

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