Rigid T-rail Conductor System with Movable Keeper
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Solution Overview
Problem
Existing overhead third rail collection/distribution systems for railway traction are difficult to install and maintain, require special tools, and often necessitate a secondary feeder or messenger cable, limiting their suitability for high-speed applications and tight spaces.
Innovation Solution
A rigid rail conductor system featuring a T-rail with a movable keeper for easy wire installation and removal, a holder for alignment, a bi-metallic feeder assembly to prevent corrosion, and expansion joints to accommodate temperature changes, along with a T-rail section isolation assembly for separate power sources, facilitating ease of installation and maintenance without specialized tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a traditional overhead third rail system with elastic profile sides holding a copper wire is used, then the system can be installed at elevated height for high-speed applications, but the wire installation and replacement requires special tools and is difficult to perform
Solution Approach 1:
The keeper is designed to move between a closed position (holding the wire) and an open position (releasing the wire). This dynamic mechanism allows operators to easily install or replace the contact wire by simply opening the keeper, without requiring special tools or complex procedures, while maintaining secure holding during operation
Solution Approach 2:
The rail profile is divided into functional segments: the T-rail structure, the movable keeper mechanism, and the contact wire. This segmentation allows the keeper to be independently operated to facilitate wire installation and replacement, while the T-rail provides stable support for high-speed applications
2Speed
If a flexible catenary system is used, then the system presents better dynamic performance for high speed trains, but it requires a large number of components and greater overall height
Solution Approach 1:
The system merges the advantages of the rigid T-rail structure with a movable keeper mechanism into a single integrated overhead third rail system. This combination eliminates the need for separate messenger cables and complex catenary components, reducing overall system complexity while maintaining suitability for high-speed applications
Solution Approach 2:
The T-rail with movable keeper serves multiple functions: it provides structural support, enables easy wire installation and replacement, and maintains stable electrical contact for high-speed trains. This multi-functionality replaces the need for separate components found in traditional catenary systems
3Reliability
If an overhead third rail system is used, then the risk of accidental contact is reduced compared to traditional third rail systems, but installation and maintenance require specialized tools and procedures
Solution Approach 1:
The movable keeper mechanism transforms maintenance from a complex specialized procedure into a simple operational task. Operators can easily open the keeper to access or replace the contact wire, significantly improving ease of repair while the elevated overhead position maintains safety by reducing accidental contact risk
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system allows for efficient, cost-effective installation and maintenance, reduces the risk of accidental contact, and is suitable for high-speed and low-profile applications without the need for a secondary feeder or messenger cable, enhancing safety and operational efficiency.
Implementation Method 1
a bi-metallic feeder assembly to prevent corrosion
Implementation Method 2
expansion joints to accommodate temperature changes
Data Source
AI summary
The rigid T-rail conductor system is configured to support a contact wire in an overhead railway electrification system. The rigid T-rail includes a first rail configured to be disposed in an overhead position of the railway electrification system. The rigid rail includes a keeper disposed on a side of the first rail, the keeper configured to be movable. When the keeper is in the first position, the keeper holds and affixes the wire on the first rail. When the keeper is in the second position, the keeper allows the wire to be installed or to be removed from the rail.