Composite sleeper with wooden inner core

Abstract

A composite sleeper with a wooden inner core that can be used to support railway rails, the inner core of the sleeper is a wooden material, and glass fiber roving soaked with unsaturated polyester resin is longitudinally wound on the outside of the wooden material. The outermost 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 composite sleeper of the invention will not be damaged by interlayer shear force when the sleeper is bent under force, and has high safety and long service life. In addition, the outer layer of the composite sleeper is still polyurethane composite material, so it has the excellent characteristics of hydrolysis resistance, oil resistance, and weather resistance unique to weathering environment; To a certain extent, the demand for polyurethane is saved, the cost of this type of composite sleeper is reduced, and the performance of the sleeper is not affected at the same time.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a composite sleeper. 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. [0003] Among them, wooden sleepers are more commonly used, which have good elasticity, light weight, simple manufacture and good insulation performance; in railway construction and special track running equipment laying, there is a large friction coefficient between wooden sleepers and crushed stone ballast, which has a stable specialty. In addition, the fasteners in the wooden sleeper are simply connected with the wooden sleeper, and its laying, maintenance...

AI Technical Summary

Problems solved by technology

[0009] 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.

[0010] The second technical problem to be solved by the present invention is that the polyurethane synthetic sleepers in the prior art use a large number of polyurethane materials, so that the cost of the sleepers is greatly increased, and then provide a synthetic polyurethane sleeper with the same properties and low cost. composite sleepers

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