Rail Expansion Joint Structure With Sliding Buffer Adjustment
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Solution Overview
Problem
Existing rail temperature expansion joints are prone to breaking and deformation due to their design, which limits their adjustment range and service life, and poses safety and stability concerns during train operations.
Innovation Solution
A rail temperature expansion joint design featuring a sleeper with two first and second rails connected by adjustment components, including side plates, sliding grooves, support rods, buffer springs, and connecting rods, which allow for greater adjustment range and stability, preventing derailment and arching of rails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If steel plates are used to connect rails in existing expansion joints, then the structure is simple, but the steel plates are prone to breaking and deformation under long-term pulling forces
Solution Approach 1:
The connection structure is divided into multiple components: connecting rods, support rods, sliding plates, and buffer springs. This segmentation allows each component to perform its specific function, with the buffer spring absorbing pulling forces and the connecting rod maintaining connection, thereby improving reliability while managing complexity
Solution Approach 2:
Buffer springs are installed in advance between the connecting rod and the rail to cushion the pulling forces before they can cause damage. This beforehand cushioning prevents the connecting rod from breaking under thermal expansion forces, significantly extending service life
2Device complexity
If steel plates are used to connect rails, then the structure is simple, but the adjustment range is limited and the rails are easily deformed by pulling and extrusion
Solution Approach 1:
The connection structure transitions from a rigid steel plate to a dynamic system with sliding plates and buffer springs. The sliding plate can move along the rail, and the buffer spring can compress and extend, allowing the expansion joint to adapt to varying thermal expansion conditions and greatly increasing the adjustment range
3Device complexity
If existing expansion joint design is used, then the structure is simple, but safety and stability are compromised during train operations
Solution Approach 1:
Buffer springs are pre-installed to cushion pulling forces before they can cause derailment. This beforehand cushioning ensures safety by preventing the rail from being pulled out of position during train operations
Solution Approach 2:
The connection is segmented into multiple functional components that work together to maintain stability: the connecting rod provides structural connection, the support rod provides lateral support, the sliding plate allows controlled movement, and the buffer spring absorbs forces. This segmentation improves safety and stability while managing complexity
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 solution enhances the service life and stability of the rail connection by preventing derailment and arching, ensuring the rails remain securely attached to the ground, thereby improving safety and extending the operational lifespan of the expansion joint.
Implementation Method 1
an outer peripheral surface of the support rod is sleeved with the sliding plate and the buffer spring; one end of the buffer spring is fixedly connected inside the sliding groove, an other end of the buffer spring abuts against the sliding plate
Data Source
AI summary
A rail temperature expansion joint and a laying and mounting method thereof relate to the technical field of track transit. The rail temperature expansion joint includes a sleeper, the upper surface of the sleeper is symmetrically mounted with two first rails and two second rails, and the first rail and the second rail on one side are arranged on the same straight line; a gap is arranged between end faces of the first rail and the second rail; the adjacent ends of the first rail and the second rail are fastened and positioned by a group of adjustment components, the adjustment components are fixedly mounted on the embedded part, and the embedded part is located at the outer side of the first rail and the second rail.