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Bridge cable sleeve pipe and preparation method thereof

A technology for cable casing and bridge cable, which is applied in the field of preparation of anti-corrosion casing for cables, can solve the problems such as the failure to improve the light-aging resistance of highly cross-linked polyethylene and the poor fluidity of highly cross-linked polyethylene, and meets the equipment requirements Not high, improving wear resistance and aging resistance, and the effect of smooth response

Active Publication Date: 2017-04-26
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dicumyl peroxide (DCP) is generally used as peroxide. However, highly cross-linked polyethylene pipes cannot be directly used as cable casings for bridges. Second, the anti-light aging performance of highly cross-linked polyethylene has not actually improved

Method used

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  • Bridge cable sleeve pipe and preparation method thereof

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Effect test

Embodiment

[0022] Preparation of bridge cable casing:

[0023] a. After mixing high-density polyethylene, dicumyl peroxide in parts by weight of 100:0.5-1.0, antioxidant 0.2-0.8, and lubricant 0-1.2, add it to an open mill and knead for about 5- For 8 minutes, control the temperature at about 130°C to become a material that is evenly mixed and not cross-linked;

[0024] b. Heat-extrude the polyethylene casing through a twin-screw extruder, wherein the temperature is 150-200°C, and the extruded cross-linked polyethylene casing is hollow, with a wall thickness of 1-4mm. The specific group distribution ratio is listed in the table.

[0025]

[0026] In order to study the aging and cracking time of polyethylene materials with different cross-linking degrees, and investigate the modification effect of cross-linked polyethylene materials on polyethylene, the gel content of cross-linked polyethylene casing specimens with seven formulations was measured, and the stress, UV aging test. Set ...

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Abstract

The invention discloses a bridge cable sleeve pipe and a preparation method thereof. The sleeve pipe is prepared from slightly crosslinked polyethylene, and the crosslinking degree is about 1.5 to 15%. The preparation method comprises the following steps: mixing high density polyethylene, dicumyl peroxide, an antioxidant, and a lubricant according to a weight ratio of 100:0.5-1.0:0.2-0.8:0-1.2; adding the mixture into an open mixing machine, carrying out mixing for about 5-8 minutes at a controlled temperature of about 130 DEG C so as to obtain an evenly mixed material that has not been crosslinked; adding the material into a double screw extruder, and carrying out hot extrusion at a temperature of 150 to 200 DEG C to obtain a hollow polyethylene sleeve pipe, wherein the wall thickness of the polyethylene sleeve pipe is 1 to 4 mm. The prepared slightly crosslinked polyethylene sleeve pipe has the advantages that the wear resistant and anti-aging performance of polyethylene material is greatly improved, and the service life of a bridge cable system is prolonged therefore.

Description

technical field [0001] The invention relates to the field of bridge cables, and more specifically relates to an anti-corrosion sleeve for bridge cables, and also relates to a preparation method for the anti-corrosion sleeve for bridge cables. Background technique [0002] The cables of bridges are the main load-bearing structures of modern long-span bridges, such as suspension bridges, cable-stayed bridges and arch suspension bridges, and can also be said to be the lifelines of bridges. The cable has been subjected to dynamic and static loads for a long time, and is exposed to wind, rain, humidity and polluted air. It is not only subject to "stress corrosion", "fatigue corrosion" and "metal corrosion", it is easy to suffer corrosion damage. Once corrosion occurs ,The consequences could be disastrous. There have been examples of bridge cable damage and failure at home and abroad, and the safety accidents and economic losses caused are very serious, and the cables must be pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K5/00C08K5/14
CPCC08K5/00C08K5/14C08L23/06
Inventor 任显诚胡文轩
Owner SICHUAN UNIV