Railway Crossing Panel With Deformation Area And Support Projections
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Solution Overview
Problem
Existing track crossing devices face issues with maintaining a stable surface independent of external influences, particularly temperature changes, which can lead to deformation and safety hazards for pedestrians and vehicles due to inadequate support and elasticity in the deformation area adjacent to rail heads.
Innovation Solution
A panel assembly comprising a rail connection plate with a deformation area supported by a lower area featuring multiple projections that provide additional restoring force, combined with a central plate and busbar connecting plate, ensures the surface remains flush with the rail head, using solid material for the upper area and recesses in the lower area for deformation, and incorporating wear-reducing components like corundum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the panel is made elastically deformable to accommodate wheel rims, then the panel can deform when rail vehicles pass, but the panel yields in the area near the rail head and fails to return to its original shape due to thermal expansion and contraction
Solution Approach 1:
The panel is divided into a rigid base area and a deformable area with distinct functions. The rigid base area provides structural stability and thermal resistance, while the deformable area with reduced thickness accommodates wheel rims. This segmentation allows each zone to optimize its properties without compromising the other.
Solution Approach 2:
Different regions of the panel have different thicknesses and material properties. The area adjacent to the rail head has reduced thickness (2-3 cm) for elasticity, while the central area maintains greater thickness for rigidity. This local differentiation enables the panel to simultaneously achieve deformability where needed and stability where required.
2Adaptability or versatility
If the panel is made thin and elastically deformable near the rail head, then the panel can flex under wheel rim load, but the panel is susceptible to wear and cannot maintain structural integrity
Solution Approach 1:
The panel structure separates the load-bearing function (thin deformable area) from the structural support function (rigid base area with support projections). The support projections extend into the deformable area to provide localized reinforcement and wear resistance while allowing the surface to remain flexible.
Solution Approach 2:
The panel combines materials with different properties: a rigid base material providing structural integrity and wear resistance, and a more elastic surface material in the deformable area that can flex under load. This composite structure allows simultaneous achievement of flexibility and strength.
3Ease of operation
If the panel is dimensioned to end a short distance in front of the rail head at normal temperatures, then the panel fits properly, but thermal expansion causes the panel to stretch and become stuck under the rail head
Solution Approach 1:
The panel has a rigid base area with reduced thermal expansion characteristics near the rail head, while the deformable area with lower thickness can accommodate dimensional changes. This local differentiation allows the panel to maintain proper fit while compensating for thermal expansion through controlled deformation in the flexible zone.
Solution Approach 2:
The panel design changes the thickness parameter in the area adjacent to the rail head, creating a transition zone that can accommodate thermal expansion and contraction. This parameter modification allows the panel to maintain dimensional stability overall while providing flexibility to handle temperature-induced dimensional changes.
4Adaptability or versatility
If a very soft yielding material is used to provide deformability, then the material can absorb deformation in its entire volume range, but the material is very susceptible to wear
Solution Approach 1:
The panel separates the wear-resistant function (rigid base area) from the deformability function (soft deformable area with support projections). The support projections provide localized reinforcement in the deformable area, reducing wear susceptibility while maintaining the ability to absorb deformation through the soft material's elasticity.
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 provides a stable, walkable, and drivable surface that is resistant to thermal expansion and contraction, ensuring the deformation area returns to its original shape after rail vehicle passage, while minimizing wear and allowing for easy replacement of components, thus enhancing safety and durability.
Implementation Method 1
the at least one rail connection plate has a deformation area to be positioned directly adjacent to the rail, which can be deformed when a rail vehicle runs over the rail with a wheel rim of a rail vehicle wheel and after running over it essentially in returns to its original shape
Implementation Method 2
If these are dimensioned in such a way that they only end a short distance in front of the rail head at normal ambient temperatures, strong solar radiation and correspondingly strong heating of the plates causes them to expand so much that they are present on the side surface of a rail head under a certain pretension
Data Source
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AI summary
A railway level crossing for use by e.g. road vehicles or pedestrians has the gaps between the rails filled by a profiled rubber pad is in close contact with the rails. That part of the pad in contact with the rails has an undercut void, allowing the top part of the pad to descend into the void when a railway train or wagon passes. The pad reverts to its original form after the train has passed.