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Composite sleeper

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

Active Publication Date: 2010-10-06
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, wherein the innermost inner core 1 is a composite material, and the outer layer 3 is treated with a coupling agent surface. Glass fiber multi-axial cloth impregnated with polyurethane resin.

[0034] First, select 30% by weight of trihydric alcohol, 69.9% by weight of isocyanate, and 0.1% by weight of foaming agent, and mix the above 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, process it into specifications of 2000-3200 mm in length, 100-230 mm in width, and 100-290 mm in height, and then make the grammage 600 g / m 2 The alkali-free glass fiber triaxial cloth that has been surface-treated by a silane coupl...

Embodiment 2

[0038] Select 59.5% by weight of trihydric alcohol, 40.0% by weight of isocyanate, and 0.5% by weight of foaming agent, and mix the above raw materials 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.

[0039] Select the wood residue reinforced phenolic resin-based composite material as the material of the inner core 1, process it into specifications of 2000-3200mm in length, 100-230mm in width, and 100-290mm in height, and then make the grammage 900g / m 2 The alkali-free glass fiber triaxial cloth that has been surface-treated by a silane coupling agent is wrapped on the outside of the above-mentioned inner core 1, and the above-mentioned 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 ...

Embodiment 3

[0043] figure 2 It is a schematic sectional view of the structure of a 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 inner core 1 is a composite material, and the outer layer 3 is A glass fiber multi-axial cloth impregnated with a polyurethane resin after surface treatment with a coupling agent, and the sandwich layer 2 between the above two layers is a glass fiber roving impregnated with a polyurethane resin.

[0044] Select 29.9% by weight of trihydric alcohol, 70.0% by weight of isocyanate, and 0.1% by weight of foaming agent, and mix the above raw materials to obtain 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] Select the rubber-plastic composite material ...

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Abstract

The invention discloses a composite sleeper comprising an inner core and an outer surface layer, wherein the inner core is one or several of a glass fibre reinforcement unsaturated polyester resin composite material, a wood remainder reinforcement phenolic resin-based composite material and a rubber plastic composite material, and the outer surface layer of the composite sleeper is glass fibre multi-axial cloth after being soaked by polyurethane resin after the surface treatment of a coupling agent. The sleeper has good elasticity, easy processing, corrosion resistance and insulation. When in use, the sleeper can avoid the technical problems of short service life, poor elasticity, easy cracking and easy rupture under stress existing in a traditional sleeper.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a sleeper composed of polymer composite materials. Background technique [0002] Sleepers are often used to carry objects and are indispensable materials in the fields of railway construction, special track running equipment laying and carrying equipment. According to the difference of its constituent materials, sleepers are mainly divided into wooden sleepers, reinforced concrete sleepers, steel sleepers and composite material sleepers. However, there are all defects of their own. Although steel sleepers are firm and durable, they are expensive, heavy, difficult to move, and have little elasticity; although wooden sleepers have good wood elasticity, light weight, simple manufacture, and good insulation performance, they are easy to weather and crack, and have low corrosion resistance. Poor, short service life, large wood consumption; although reinforced concrete s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B3/46
Inventor 张听陈文姬孙志杰
Owner 北京交跃通达检测科技有限公司
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