Method for twining double helix line of inhaul cable having wind-rain induced vibration resistance

A double-helix and helix-vibration technology for cables, which is applied in the field of cable manufacturing, can solve problems such as limited vibration reduction effects, and achieve the effects of easy operation, suppression of damage, and increased service life

Inactive Publication Date: 2011-05-11
SHANGHAI PUJIANG CABLE
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The direct measure adopted by the prior art is the aerodynamic damping measure, and the damping effect is limited

Method used

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Examples

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Embodiment Construction

[0014] A double-helix winding method for anti-wind and rain vibration stay cables, which includes steel wires, spiral ribs and helical wires, and the winding method includes:

[0015] 1. Select high-strength galvanized steel wire and spiral ribs, and do a good job of quality inspection. The helix is ​​made of high-density colored polyethylene material with the same color as the color PE on the outer layer of the cable. The diameter of the helix should be determined according to the outer diameter of the specific cable. The outer diameter of the cable is not greater than Φ200mm. If the outer diameter of the cable is greater than Φ200mm, choose a helix with a diameter of Φ8mm.

[0016] In order to achieve the best effect of anti-wind and wind vibration and small wind resistance coefficient at the same time, the pitch of a single helix is ​​taken to be 6-10 times the diameter of the cable during production.

[0017] 2. Steel wire blanking, enter the production line.

[0018] 3....

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Abstract

The invention relates to a method for twining a double helix line of an inhaul cable, in particular to a method for twining the double helix line of the inhaul cable having wind-rain induced vibration resistance. The double helix line comprises a steel wire, a helix rib and helix lines, wherein the twining method comprises the steps: (1) choosing the high-intensity zinc plated steel wire, helix rib and helix line, wherein the helix line is made of high-intensity colored polyethylene materials having the same color as the PE color of an inhaul cable jacket layer, and the diameter of the helix line is phi 5mm or phi 8mm based on the concrete outer diameter of the inhaul cable, (2) twisting the steel wire, wherein the steel wire bundle is concentrically twisted towards the left side, (3) wrapping, and (4) extrusion molding: wrapping the helix rib, extruding a black PE and colored PE double jacket layer outside of the wrapped steel wire bundle, wherein the jacket layer is tightly wrapped on the steel wire bundle; after finishing the extrusion molding, the helix rib is wrapped before cooling the PE of the double jacket layer; and two helix lines are wrapped at the same time. The inhaul cable prepared by using the twining method provided by the invention can efficiently resist wind-rain induced vibration so as to ensure the safety of bridges.

Description

technical field [0001] The invention relates to cable manufacturing, in particular to a drag cable helical winding method. Background technique [0002] Wind and rain induced vibration is a kind of intense and large-scale vibration that will occur in the cable under the joint action of wind and rain. When the vibration is severe, two adjacent cables will collide. The vibration of the cable will cause the fatigue of the cable end joint, damage the anti-corrosion system of the cable, and seriously cause the failure of the cable. The vibration of the cables will also cause discomfort to the pedestrians and doubt the safety of the bridge, so sufficient attention must be paid to the anti-wind and rain vibration of the cables. The direct measure adopted in the prior art is exactly the aerodynamic damping measure, and the damping effect is limited. Contents of the invention [0003] The purpose of the present invention is to overcome the disadvantages of the prior art and provi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D07B3/00D07B7/14
CPCD07B5/005
Inventor 张德刚张海良陈滔方雷金军
Owner SHANGHAI PUJIANG CABLE
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