Manganese steel fork core steel rail split type frog

Abstract

The invention relates to a manganese steel fork core steel rail split type frog. The manganese steel fork core steel rail split type frog is formed by splicing a standard steel rail wing rail and a fork core. The manganese steel fork core serves as the core and is spliced with the standard steel rail wing rail and a standard steel rail fork heel rail through high-strength bolt pairs. The bottom face of a fork core rail is embedded into the upper surface of the steel rail bottom of the standard steel rail wing rail. Vertical force applied to the core rail is directly transmitted to the rail bottom of the standard steel rail wing rail. The manganese steel fork core steel rail split type frog has the advantages that a frog harmful space region and a core rail sharp point region are spliced with the steel rail through the manganese steel fork core rail, the wing rail and a spacer block in a continuous casting mode, the number of connecting parts is reduced, mutual vertical moving, caused by the phenomenon that the wing rail, the fork heel rail and the fork core are not stressed at the same time and the independent spacer block is used for force transmission and limiting, of the wing rail and the fork heel rail is avoided, and the integrity of the frog is improved. A large frame structure of the block cast high manganese steel frog is improved through the manganese steel fork core so that deep hardening can be easily achieved, accordingly, wear resistance of the frog is improved by improving initial hardness of the frog, and maintenance workloads are reduced. Meanwhile, the advantages that high manganese steel can be used for on-line welding and repairing, using cost is reduced, and the service life of the frog is prolonged.

Description

technical field [0001] The invention relates to a manganese steel fork core steel rail assembled frog of a railway line turnout, which belongs to the technical field of railway track improvement. Background technique [0002] A turnout is a connecting and crossing device that enables rolling stock to enter or cross another line from one line. Frog is the key equipment for crossing trains on railway lines, and it is the equipment that makes the wheels pass from one rail to another. Due to the requirements of the wheel running, the acute-angle frog forms a special structural form with wing rails on both sides and fork core (heart rail) in the middle. Frogs in existing turnout designs can be divided into fixed frogs and movable frogs according to their structural forms; they can be divided into combined and integral casting frogs according to their structures. High-manganese steel integral casting frogs and alloy steel fork core rail assembled frogs are the most commonly used...

AI Technical Summary

Problems solved by technology

However, once a crack occurs on the bainitic alloy steel fork center line, it will be brittle and fracture if it is not found in time, which poses a great threat to driving safety, and no matter whether it is a crack or a peeling off defect, bainitic alloy steel cannot be repaired online repair

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