High-strength composite cable trough for railway and preparation process

Abstract

The invention relates to a high-strength composite cable trough for a railway and a preparation process. The technical scheme is as follows: the high-strength composite cable trough comprises a trough cover and a trough body made from composite materials, a supporting frame and fastening bolts, wherein the trough body adopts a rectangular trough-type structure with an open top; the trough cover adopts a rectangular structure and is mounted at the top of the trough body; trough cover hanger structures are arranged on two sides of the trough cover; trough body hanger structures are arranged on two sides of the trough body; the trough cover and the trough body are sequentially connected end to end and assembled and then are fixed through the supporting frame; and the supporting frame consists of an upper part and a lower part. The beneficial effects are as follows: a sheet molding compound (SMC) is taken as a raw material and subjected to high-temperature curing and pressing through a forming mold to form the high-strength composite cable trough. The SMC is prepared by taking unsaturated polyester resin as a base material, taking alkali-free non-twist glass fibers as reinforcement materials and fully mixing the base material and the reinforcement materials with inorganic fillers, assistants and the like, so that the problems of a product in aspects of fire retardancy, insulation, high strength and the like are solved, and the high-strength composite cable trough is convenient to transport and mount and long in service life, and fully meets related standard requirements of railway construction.

Description

technical field [0001] The invention relates to a cable trough for railway construction, in particular to a high-strength composite material cable trough for railways and its preparation process. Background technique [0002] With the rapid advancement of national infrastructure construction, the country's investment in railway construction has increased year by year, and the number of new railways has increased year by year. In the process of railway construction, a large number of cables and signal lines need to be laid on the whole line, and the demand for cable troughs is huge, and the safety protection of cables is also increasingly valued by people. At present, the cable troughs used in railway construction are mainly cement prefabricated cable troughs and fiberglass extruded cable troughs, which mainly have the following shortcomings during use: [0003] 1. Inconvenient installation. Each section of cement cable duct is only 3-5 meters long, but each section wei...

AI Technical Summary

Problems solved by technology

Although the fiberglass pultrusion cable duct is light in weight, due to the limitation of the molding process, the product is of equal cross-section structure, and the adjacent slots are all flat-jointed, which requires high installation accuracy and low construction efficiency.

[0004] 2. Poor weather resistance and short service life

In outdoor open-air environment, cement products are susceptible to moisture erosion, and they are easy to crisp under exposure conditions, resulting in a decrease in product quality and a reduced service life

FRP pultruded cable troughs are made of poor materials, and the resin on the surface of the product is seriously lost under sunlight exposure, and the aging resistance is poor.

[0005] 3. Poor waterproof effect and low safety factor

The microscopic hole structure of the cement cable trough is easy to absorb water under wet conditions, which poses a great safety hazard to the internal cable trough. Once a short circuit occurs, dangerous accidents will easily occur

In addition, the cement cable trough is the same as the FRP pultruded cable trough, and the adjacent cable troughs are connected with flat openings. The gap is large, the rainproof and waterproof effects are poor, and the protective effect is greatly reduced.

[0006] 4. High maintenance cost

It is inconvenient to maintain and replace the cement cable trough in the later stage, the production efficiency is low, the replacement cycle is long, and the overall cost is high

Due to the limitations of the production process, the FRP pultruded cable duct has low lateral strength and is easy to bend and deform; when repairing and replacing, the size deviation between the old and new parts is large, which may easily cause the product to not match after assembly

[0007] 5. Low mechanical properties and unstable quality

Cement cable ducts have low impact strength and poor toughness, require high protection during handling and installation, and have low fatigue strength, so they are not suitable for use under dynamic load conditions; FRP pultruded cable ducts are limited by the production process. The transverse strength of the product is low, and it is easy to bulge and delaminate during the forming process of the product, and transverse cracks appear, which seriously affect the normal use of the product

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