Opposite insertion type steel rail expansion joint

Abstract

A metro and high-speed rail steel rail thermal expansion and cold contraction opposite insertion type steel rail expansion joint is simple in structure, safe, reliable, convenient to maintain and suitable for being used for connection of high-speed rail and metro steel rails in various areas. The opposite insertion type steel rail expansion joint has the biggest advantages that the mode that upper connecting rails are mutually crossed and butted is adopted, the expansion joint of the steel rail joint is divided into two halves at different front and back positions, and when a train runs at a high speed, noise generated when the train collides with a railhead joint by wheels of the train in the past is avoided. Meanwhile, the width of the rail waist of the middle rail of the opposite insertion type steel rail expansion joint is increased, so that the safety problem of stress deformation during high-speed running of the train cannot be influenced, and the problem of thermal expansion and cold contraction of the high-speed rail steel rail is well solved. The oppositely insertion type steel rail expansion joint not only reduces the construction cost of a high-speed rail and improves the construction speed of the high-speed rail, but also greatly reduces the maintenance cost of the high-speed rail.

Description

technical field [0001] The invention relates to a rail thermal expansion and cold contraction expansion joint, in particular to a rail thermal expansion and cold contraction plug-in rail expansion joint for subways and high-speed rails in areas with large temperature differences. Background technique [0002] Although high-speed railways in most parts of China are built with seamless steel rails, the construction and maintenance costs of seamless steel rails are high. In order to solve the problem of thermal expansion and contraction of rails, it is mainly to increase the number of rail fasteners to fix the thermal expansion and contraction of rails. This will increase the construction cost and difficulty of high-speed rail, especially the high maintenance cost after construction. This is why China rarely uses seamless steel rails for construction in alpine regions, and a small amount of seamless steel rails is used. It is also necessary to loosen the fasteners regularly for...

AI Technical Summary

Problems solved by technology

[0002] Although high-speed railways in most parts of China are built with seamless steel rails, the construction and maintenance costs of seamless steel rails are high. In order to solve the problem of thermal expansion and contraction of rails, it is mainly to increase the number of rail fasteners to fix the thermal expansion and contraction of rails. This will increase the construction cos

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