Seamless rail welding structure for improving welding bearing capacity and left and right operating stability

Abstract

The invention discloses a seamless rail welding structure for improving welding bearing capacity and left and right operating stability and belongs to the technical field of railway train seamless rail welding. The seamless rail welding structure consists of rails and welding lines, wherein the welding lines of the rails are in an inclined plane; the inclined plane is parallel to an X axis of the rail and forms an angle of beta with a Y axis of the rail; the angle of beta is 45 degrees or 60 degrees; the inclined plane is connected through welding technology, and the welding technology is thermit welding; the rails are two parallel rails; the welding lines on the rails are staggered; and the staggered length is greater than the length of a railway carriage. The seamless rail welding structure can eliminate left and right oscillation of wheel rims when the wheel rims pass through welding lines on the side of a railhead, can improve the wheel set bearing capacity of the rails, can improve the smoothness and stability for welding seamless rails, can apply the conventional thermit welding technology to the welding of the seamless rails, improve the welding efficiency, simplify the welding technology and save the welding cost, and can be subjected to in-service welding. The seamless rail welding structure is particularly applied to long seamless rails of heavy-load trains and high-speed motor train units, and seamless rails of urban railway trains.

Description

technical field [0001] The invention belongs to the technical field of rail train seamless rail welding, and specifically changes the existing straight welding surface perpendicular to the axial direction of the rail into an oblique welding surface obliquely intersecting the rail, and effectively uses the aluminothermic welding process for seamless rail welding. Welding of seam rails. Background technique [0002] Among the existing flash welding, gas pressure welding, arc welding and thermite welding technologies of seamless rail welding, thermite welding has the advantages of simple equipment process, high welding efficiency and low cost, and can be implemented in factory welding and on-line welding , but because the welding surface of the traditional seamless welding of rails is perpendicular to the axis of the rail, there will be up and down bumps and left and right vibrations when the train passes the weld, and the direct welding surface is under pure tensile and pure s...

AI Technical Summary

Problems solved by technology

[0002] Among the existing flash welding, gas pressure welding, arc welding and thermite welding technologies of seamless rail welding, thermite welding has the advantages of simple equipment process, high welding efficiency and low cost, and can be implemented in factory welding and on-line welding , but because the welding surface of the traditional seamless welding of rails is perpendicular to the axis of the rail, there will be up and down bumps and left and right vibrations when the train passes the weld, and the direct welding surface is under pure tensile and pure shear stress, pure tensile and pure Shearing is a dangerous stress state, and aluminothermic welding is a cast structure with low strength and toughness. Therefore, the aluminothermic welding is used for seamless welding of rail straight welds. There are hidden dangers of fracture during operation, and even derailment accidents, resulting in the elimination of aluminothermic welding. This is an urgent problem to be solved in seamless rail welding technology

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