Railroad sleeper

Abstract

A railroad sleeper comprises a sleeper body (1) and railway bearing areas (3). Each railway bearing area (3) is provided with a railway bearing face (5), first reinforcing components (6) and second reinforcing components (7). The sleeper body (1), the first reinforcing components (6) and the second reinforcing components (7) are all made of composite materials, and the surface of the sleeper body (1) is sequentially provided with a flame retardant layer, a wear-resisting layer and a flame retardant layer. The composite materials comprise polyurethane resin formed in a foaming mode and a plurality of glass fibers arranged in the polyurethane resin. The flame retardant layers are formed by polyurethane resin coatings added with inorganic filler materials, and the polyurethane resin coatings are the same as the polyurethane resin of the sleeper body (1) in texture. The railroad sleeper is low in density, long in service life, good in damping effect, capable of bearing high load, stable in performance, high in weather fastness, easy to machine and install.

Description

technical field [0001] The invention relates to the field of railway tracks, and more particularly relates to a railway sleeper. Background technique [0002] Railway is currently one of the most important means of transportation in the world. With the development of railways towards high speed, heavy load and environmental protection, the requirements for tracks are getting higher and higher. As an important part of the track, the sleeper is used as a cushion under the rails, and maintains the gauge, level, height and direction between two or more strands of rails through the mutual connection parts, and prevents the rails from being caused by trains. The longitudinal crawling generated by driving and the equal distribution of various loads on the rails on the foundation of the ballast bed, its materials and structures are constantly being developed and updated. [0003] Currently used sleepers mainly include wooden sleepers, steel sleepers and concrete sleepers. As a sle...

AI Technical Summary

Problems solved by technology

As a sleeper commonly used in traditional railway tracks, although wood sleepers have the advantages of low cost, high elasticity, light weight, and good insulation, they also have insurmountable shortcomings, mainly in: easy weathering and cracking, short service life, generally only 15 years; more importantly, it consumes a large amount of forest resources and causes serious environmental problems

Steel sleepers have been used in some countries in Europe and South America. The advantages are: long service life, up to 50-60 years; large sleeper spacing to reduce consumption; can be made by smelting a large amount of scrap iron and steel, and can be returned to the furnace after being scrapped. However, its disadvantages are: high cost, heavy volume, and high noise, so it cannot be widely used

However, this reinforced fiber synthetic sleeper and its manufacturing method cannot ensure the sufficient and uniform mixing and distribution of fiber reinforced materials and resins. In addition, the adhesion between the resin and fiber reinforced materials is not strong. During the extrusion molding process, the fiber reinforced materials Easy to deform, make fiber reinforced material and numerical distribution layout, affect the quality of the sleeper

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