Seamless contact rail expansion connecting device

Abstract

The invention discloses a seamless contact rail expansion connecting device, which comprises an isosceles trapezoidal rail and two end rails respectively located at two longitudinal ends of the trapezoidal rail. An elastic fastener is arranged between the trapezoidal rail and the two end rails so that the trapezoidal rail closely contacts the two end rails in the longitudinal direction. The end rail and the back surface of the trapezoidal rail are also provided with an automatic centering part to keep the trapezoidal rail in the longitudinal center position of the two end rails in the processof sliding relative to each other. The invention provides a seamless contact rail expansion connection device, As an automatic centering part is arranged between the end rail and the trapezoidal rail,and the end rail and the trapezoidal rail are produced by cutting the same section of the main rail, the device ensures that the trapezoidal rail is kept in the middle position of the two end rails at all times when the contact rail is thermally expanded and cold contracted, and the trapezoidal rail does not produce the transverse height difference due to the machining error when the trapezoidalrail moves relative to each other, which is favorable for the current collector to smoothly pass through the expansion joint, and ensures the continuous and stable current collection between the current collector and the contact rail.

Description

technical field [0001] The invention relates to the technical field of rail transit contact rails, in particular to a seamless contact rail expansion connection device. Background technique [0002] In the field of rail transit, especially in the field of urban rail transit, the contact rail is usually arranged on both sides of the train track along the line direction, and it is connected to a power supply network such as a substation, and is mainly used to supply power to the train. At the same time, a current receiver device for taking electricity is installed on the train. The current receiver follows the train and obtains electric energy for the train through dynamic contact with the contact rail during the running process. The dynamic contact is maintained, and the current collector slides on the current receiving surface of the contact rail during the whole process. [0003] Because the metal track is greatly affected by the external environment such as temperature, t...

AI Technical Summary

Problems solved by technology

[0005] Since the existing contact rail expansion joint realizes the expansion joint of the track by setting a fracture between the two sections of the track, and the current receiver needs to keep in contact with the contact rail during the whole process of the train running, the existing technical solution will inevitably make the There are many problems when the collector passes through the fracture of the expansion joint

On the one hand, there is a discontinuity in the flow receiving surface of the fracture itself, which will cause severe collision and impact vibration between the carbon slide of the current collector and the track, which will cause impact damage to the carbon slide, reduce the service life of the current collector, and is not conducive to the flow of water. On the other hand, when the current collector passes through the fracture position, it may be temporarily separated from the track, causing electrical damage such as arcing; in addition, when the current collector passes through the fracture position and collides, it will generate relatively large noise, which will affect the ride comfort of the train

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