Method for repairing an rolled-over rail insulation joint and use of a molding of open-porous composite material as repair insert in that process

EP4286586B1Active Publication Date: 2025-01-22NAKORID GMBH
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Patent Information

Application Number
EP2022176226
Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-05-30
Publication Date
2025-01-22
Estimated Expiration
2042-05-30

AI Technical Summary

Technical Problem

Existing methods for repairing rolled-over rail insulation joints are inefficient, leading to short circuits, high maintenance costs, and frequent replacements due to wear and tear, as well as the lack of weather-resistant and durable insulating materials that can withstand the vibrations and loads from rail traffic.

Method used

A method involving grinding and chamfering the rail and insulating insert to create a gap for a new, high-strength, open-pored composite repair insert made with isocyanate-containing adhesives, which is designed to be pressure, abrasion, and temperature-resistant, and features anchor recesses for secure anchoring, using a liquid insulation material that hardens quickly and is UV-resistant.

Benefits of technology

This method provides a long-lasting, cost-effective solution that prevents short circuits and reduces maintenance by ensuring the insulating joint's durability and resistance to wear, reducing disruptions and maintenance costs while maintaining rail infrastructure availability.

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Abstract

A method for repairing an over-rolled rail insulation joint is intended to enable a particularly high-quality and durable repair of the rail system. For this purpose, the over-rolled rail material and the underlying deformed insulating insert (8) are ground down and / or cut out in such a way that a gap (12) is created that corresponds to the width and thickness of the insulating insert (8) and is sufficient to withstand the forces of the insulating material to be inserted. A repair insert (38) is placed into this gap and subsequently bonded, either materially or form-fittingly, to the remaining parts of the original insulating insert (8) in the gap (12) and to the end faces of the rail ends (4) abutting the gap (12).
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