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a composite sleeper

A technology of sleepers and composite materials, which is applied in the field of sleepers composed of polymer composite materials, can solve the problems of interlayer shear failure, single longitudinal arrangement of glass fibers, and overall failure of sleepers, and achieve high safety, good noise absorption, The effect of long service life

Active Publication Date: 2011-12-07
北京交跃通达检测科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The first technical problem to be solved by the present invention is that the arrangement of glass fibers in the polyurethane synthetic sleepers in the prior art adopts a single longitudinal arrangement, which is easy to deform and bend when the sleepers are stressed due to the lack of transverse reinforcement of shear reinforcement. The position causes the damage of the interlayer shear force, which makes the overall failure of the sleeper, and then provides a composite sleeper that does not occur the interlayer shear force damage when it is bent under force.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] figure 1 It is a schematic cross-sectional view of the composite sleeper according to the present invention. In this figure, it can be seen that the composite sleeper is divided into two layers. Among them, the innermost inner core 1 is a composite material, and the outer surface layer 3 is surface treated with a coupling agent. The glass fiber multi-axial cloth impregnated with polyurethane resin.

[0034] First, select 30% by weight of triol, 69.9% by weight of isocyanate, and 0.1% by weight of foaming agent, and mix the above-mentioned raw materials to prepare a polyurethane resin stock solution for use.

[0035] Select a commercially available glass fiber reinforced unsaturated polyester resin composite material as the material of the inner core 1, and process the length to 2000-3200mm, the width of 100-230mm, and the height of 100-290mm. Then, the weight will be 600g / m 2 The alkali-free glass fiber triaxial cloth surface-treated by the silane coupling agent is wrapped ...

Embodiment 2

[0038] Select 59.5% by weight of triol, 40.0% by weight of isocyanate, and 0.5% by weight of foaming agent, and mix the above raw materials to prepare polyurethane resin stock solution for use. In addition, the unsaturated polyester resin is diluted with the dissolving agent styrene to obtain a solution of the unsaturated polyester resin for use.

[0039] Select the wood residue reinforced phenolic resin-based composite material as the material of the inner core 1, and process the length to 2000-3200mm, the width of 100-230mm, and the height of 100-290mm. Then, the weight will be 900g / m 2 The alkali-free glass fiber triaxial cloth surface-treated by the silane coupling agent is wrapped on the outside of the inner core 1, and the prepared polyurethane resin stock solution is sprayed on the alkali-free glass fiber triaxial cloth , So that the polyurethane resin stock solution infiltrates the alkali-free glass fiber triaxial cloth until a hard shell structure, that is, the outer surf...

Embodiment 3

[0043] figure 2 It is a schematic structural cross-sectional view of the composite sleeper further provided with a sandwich layer according to the present invention. In this figure, it can be seen that the composite sleeper is divided into three layers, wherein the innermost core 1 is a composite material, and the outer surface layer 3 is The glass fiber multi-axial fabric is surface-treated by the coupling agent and then infiltrated with polyurethane resin. The sandwich layer 2 between the two layers is a glass fiber roving which is infiltrated with polyurethane resin.

[0044] 29.9% by weight of triol, 70.0% by weight of isocyanate, and 0.1% by weight of foaming agent are selected, and the above raw materials are mixed to prepare a polyurethane resin stock solution for use. In addition, the unsaturated polyester resin is diluted with the dissolving agent styrene to obtain a solution of the unsaturated polyester resin for use.

[0045] The rubber-plastic composite material is sel...

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Abstract

The invention discloses a composite sleeper, which comprises an inner core and an outer layer. The inner core is one of a glass fiber reinforced unsaturated polyester resin composite material, a woody residue reinforced phenolic resin-based composite material, and a rubber-plastic composite material or more, the outer layer of the composite sleeper is a glass fiber multi-axial cloth after surface treatment with a coupling agent and then infiltrated with a polyurethane resin. The sleeper of the invention has good elasticity, easy processing, corrosion resistance and insulation, and the sleeper can avoid the technical problems of the existing sleeper such as short service life, poor elasticity, easy cracking and easy breaking under force during use.

Description

Technical field [0001] The invention belongs to the field of composite materials, and particularly relates to sleepers composed of polymer composite materials. Background technique [0002] Sleepers are often used to carry objects and are indispensable materials in railway construction, laying of special track running equipment and carrying equipment. According to the different materials, sleepers are mainly divided into wooden sleepers, reinforced concrete sleepers, steel sleepers and composite sleepers. However, they all have their own defects. Although steel sleepers are strong and durable, they are expensive and difficult to move, and have low elasticity. Although wooden sleepers have good elasticity, light weight, simple production, good insulation properties, they are easy to weather and crack, and have better corrosion resistance. Poor, short service life and high wood consumption; although reinforced concrete sleepers have a long service life and good stability, due to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01B3/46
Inventor 孙志杰陈文姬张英杰张听
Owner 北京交跃通达检测科技有限公司
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