Low-clearance single-line tunnel overhead line system suspension structure

Abstract

The invention provides a low-clearance single-line tunnel overhead line system suspension structure. A carrier cable suspension device and a contact line locating device of the structure are fixed tothe two side walls of a tunnel, and the carrier cable suspension device is located above the contact line locating device. The carrier cable suspension device comprises a bow-shaped base, a compositeinsulator, a suspension base and a hanging pulley, the front end of the bow-shaped base is cooperatively connected with the rear end of the composite insulator, the front end of the composite insulator is fixedly connected with the suspension base, and the hanging pulley is hinged to the position below the front end of the suspension base. The contact line locating device comprises a bow-shaped base, a connecting double-lug, a rotating double-lug, an elastic insulation limiting locator and a locating cable clamp; and the connecting double-lug is fixed to the front end of the bow-shaped base, the front end of the connecting double-lug is hinged to the rotating double-lug, and the rear end of the elastic insulation limiting locator is hinged to the front end of the rotating double-lug and connected through an elastic pull rod. The suspension reliability, stability and elastic uniformity of an overhead line system are improved, the current collecting quality of a pantograph is improved, and the requirement for continuous increase of the line operation speed is met.

Description

technical field [0001] The invention belongs to the technical field of catenary systems for electrified railways, and in particular relates to a catenary suspension structure for single-track tunnels with low headroom. Background technique [0002] At present, the suspension of the catenary in the electrified low-clearance single-track tunnel mostly uses horizontal suspension and a bow-shaped single-support wrist-arm structure, and the line running speed is below 120km / h. In the horizontal suspension structure, the suspension of the catenary cable is a flexible connection, which has poor stability and affects the overall stability of the catenary system. When the running speed of the train increases, the contact pressure of the catenary line increases, and the lifting of the catenary line during work also increases. The rod insulators fixing the catenary have invaded the lifting range of the pantograph, which has become a safety hazard and may cause driving accidents. The c...

AI Technical Summary

Problems solved by technology

Especially the catenary suspension in single-track tunnels with a headroom of 6650mm and 6700mm, the clearance space is very small. For some low-room single-track tunnel projects under construction and electrification transformation, the existing contact suspension structure cannot meet the installation and use requirements, and design is urgently needed A catenary suspension structure that has stable suspension, does not affect the elastic uniformity of the catenary, and meets various electrical insulation requirements and line installation and use requirements of low-clearance single-wire tunnels

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