Anti-falling structure for traction cable

Abstract

The utility model relates to the technical field of bridge construction, and particularly discloses a traction cable anti-falling structure which comprises a bearing cable and a roller, the bearing cable is installed between catwalks on the two sides, the bearing cable is located below the traction cable, the bearing cable supports the traction cable and reduces tension generated by natural falling of the traction cable, and the roller is rotatably installed on the bearing cable and can rotate around the bearing cable. The plurality of bearing cables are arranged between the catwalks at intervals in the length direction of the traction cable, and provide support for a plurality of positions of the traction cable; the roller is installed on the bearing cable through a bearing, friction force between the roller and the bearing cable is reduced, and sliding of the traction cable on the roller is facilitated. Limiting plates are arranged on the two sides of the roller to limit the bearing, so that the roller cannot freely slide on the bearing cable. The bearing cable is arranged between the catwalks, the rollers are arranged on the bearing cable, the traction cable is supported by the bearing cable, the traction cable slides on the rollers, tension generated by falling of the traction cable is effectively reduced, traction force is reduced, and construction operation is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to a traction cable anti-fall structure. Background Technology

[0002] The construction of the main cable of suspension bridges often adopts the construction method of erecting prefabricated parallel steel wire strands one by one. Currently, there are two commonly used strand traction systems: single-line reciprocating gantry traction system and double-line reciprocating gantry traction system. The traction system includes a winch, traction cable, and puller. The winch provides traction force to the traction cable, and the puller is installed on the traction cable to pull the strands. In the single-line reciprocating gantry traction system, the main and auxiliary winches are arranged on both banks of the bridge span, while in the double-line reciprocating gantry traction system, the main and auxiliary winches and the cable release mechanism are arranged on the same side of the bridge span, which facilitates command and personnel allocation during construction. The traction cable circulates between the main and auxiliary winches to pull multiple strands. After pulling the strands to the opposite bank, the strands and puller are removed from the traction cable, and the traction cable returns to the cable release mechanism. In the existing system, the traction cable is in a natural downward state when returning. During the construction of long-span bridges, due to the large weight of the traction cable itself, the natural downward state will bear a large tension, which requires a larger traction force from the traction system, which is not conducive to construction. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the technical problem solved by this utility model is to provide a traction cable anti-fall structure, thereby solving the existing problems.

[0004] To solve the above problems, the technical solution adopted by this utility model is: a traction cable anti-fall structure, including a support cable and a roller. The support cable is installed between the two catwalks and is located below the traction cable. The support cable lifts the traction cable and reduces the tension of the traction cable caused by natural falling. The roller is rotatably installed on the support cable and the traction cable can slide on the roller during traction.

[0005] The beneficial effects of this solution are as follows: Compared with the prior art, the anti-fall structure of the traction cable of this utility model sets a supporting cable between the catwalks, and sets a roller on the supporting cable, so that the traction cable is supported by the supporting cable and slides on the roller, which effectively reduces the tension of the traction cable due to falling, reduces the traction force, and is beneficial to construction operations.

[0006] Furthermore, the projection of the support cable into the horizontal direction of the traction cable is perpendicular, and the support cable consists of several cables spaced apart along the length of the traction cable between the catwalks, providing support for the traction cable at multiple locations.

[0007] Furthermore, the roller is mounted on the support cable via a bearing, which reduces the friction between the roller and the support cable, facilitating the sliding of the traction cable on the roller.

[0008] Furthermore, limiting plates are provided on both sides of the roller to limit the bearing and prevent the roller from sliding freely on the load-bearing cable.

[0009] Furthermore, the limiting plate is symmetrically mounted on the bearing cable by bolts, which facilitates the adjustment of the position of the roller on the bearing cable to ensure that the traction cable can accurately fall onto the roller.

[0010] Furthermore, the roller is provided with side plates on both sides, and the diameter of the side plates is larger than the diameter of the middle part of the roller, which can prevent the traction cable from slipping out of the roller.

[0011] Furthermore, the roller is made of nylon, which has a low coefficient of friction, reducing the friction between the traction cable and the roller and facilitating the sliding of the traction cable. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the roller installation of this utility model;

[0014] In the diagram: 1-carrying cable, 2-roller, 3-bearing, 4-limiting plate, 5-side plate, 6-catwalk, 7-traction cable. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Implementation, for example, attached Figures 1 to 2 As shown: The anti-fall structure of the traction cable includes a support cable 1 and a roller 2. The support cable 1 is installed between the two catwalks 6 on both sides. The support cable 1 is located below the traction cable 7. The support cable 1 lifts the traction cable 7 and reduces the tension generated by the traction cable 7 due to natural falling. The roller 2 is rotatably installed on the support cable 1. The traction cable 7 can slide on the roller 2 during the traction process to reduce friction and thus reduce the traction force, which facilitates construction operations.

[0017] The projection of the support cable 1 into the horizontal direction of the traction cable 7 is perpendicular. Several support cables 1 are spaced apart along the length of the traction cable 7 within the catwalk 6, providing support at multiple locations on the traction cable 7. The roller 2 is mounted on the support cable 1 via bearings 3, reducing friction between the roller 2 and the support cable 1 and facilitating the sliding of the traction cable 7 on the roller 2. Limiting plates 4 are provided on both sides of the roller 2 to limit the bearings 3, preventing the roller 2 from sliding freely on the support cable 1. The limiting plates 4 are symmetrical vertically and are bolted to the support cable 1 for easy adjustment. The position of the roller 2 on the support cable 1 ensures that the traction cable 7 can accurately fall onto the roller 2; the roller 2 is provided with side plates 5 on both sides, the diameter of the side plates 5 is larger than the diameter of the middle part of the roller 2; the support cable 1 is arc-shaped due to its own weight, and the traction cable 7 will slide towards the bottom of the support cable 1; the traction cable 7 may swing on the roller 2 due to crosswinds, and the side plates 5 can limit the swing amplitude of the traction cable 7 and prevent the traction cable 7 from sliding off the roller 2; the roller 2 is made of nylon material with a low coefficient of friction, which reduces the friction between the traction cable 7 and the roller 2 and facilitates the sliding of the traction cable 7.

[0018] The specific implementation process is as follows: Roller 2 is installed on bearing cable 1, and two rollers 2 are installed on one bearing cable 1, corresponding to the traction cables 7 on both sides respectively. The position of roller 2 on bearing cable 1 is adjusted according to the position of traction cable 7. Bearing cable 1 is connected to catwalks 6 on both sides so that bearing cable 1 is located below traction cable 7. Traction cable 7 can slide on roller 2. Several bearing cables 1 are set at intervals between catwalks 6 on both sides to lift traction cable 7, reduce the tension of traction cable 7 due to natural falling, and the sliding of traction cable 7 on roller 2 effectively reduces friction and traction force, which is conducive to traction construction.

[0019] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A traction cable anti-fall structure, comprising a load-bearing cable and a drum, characterized in that: The support cable is installed between the two catwalks and is located below the traction cable. The support cable lifts the traction cable, reducing the tension caused by the traction cable's natural descent. The roller is rotatably mounted on the support cable, and the traction cable can slide on the roller during traction.

2. The traction cable fall prevention structure according to claim 1, characterized in that: The projection of the load-bearing cable into the horizontal direction of the traction cable is perpendicular, and there are several load-bearing cables that are spaced apart along the length of the traction cable between the catwalks.

3. The traction cable fall prevention structure according to claim 1, characterized in that: The roller is mounted on the support cable via bearings.

4. The traction cable fall prevention structure according to claim 1, characterized in that: Limiting plates are provided on both sides of the roller.

5. The traction cable anti-fall structure according to claim 4, characterized in that: The limiting plates are symmetrically positioned vertically and are bolted to the load-bearing cable.

6. The traction cable fall prevention structure according to claim 1, characterized in that: The roller has side plates on both sides, and the diameter of the side plates is larger than the diameter of the middle part of the roller.

7. The traction cable fall prevention structure according to claim 1, characterized in that: The roller is made of nylon.

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