English Type Railway Turnout Modular Switch Stand
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Solution Overview
Problem
English-type railway turnouts are vulnerable to damage due to unprotected connecting rods, which can lead to malfunction and safety issues if damaged, and lack independent locking and displacement features for central points, making them prone to failure.
Innovation Solution
A modular design with a housing stand for connecting rods and independent lock/unlock mechanisms for central points, dynamically connected to a motorized point displacement system, providing double safety and allowing for easy maintenance and replacement of parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If connecting rods are located below tracks in an unprotected channel, then the turnout structure is simpler and easier to manufacture, but the connecting rods are vulnerable to damage from borrow buildup and foreign objects
Solution Approach 1:
The turnout structure is divided into separate functional modules: a switch stand housing containing the connecting rods and point locking devices, and a separate tie structure. This segmentation allows the connecting rods to be protected within the switch stand while maintaining manufacturing simplicity for each component.
Solution Approach 2:
The connecting rods are nested within the switch stand housing, which is itself positioned within or alongside the tie structure. This nested arrangement protects the vulnerable connecting rods from external damage while maintaining the overall compact structure.
2Device complexity
If central points share locking mechanisms with outer points, then the device complexity is reduced, but the central points lack independent control and are prone to failure
Solution Approach 1:
The locking mechanism is segmented into independent units: outer point locking devices and central point locking devices. Each set of points has its own dedicated locking mechanism, allowing independent operation and failure isolation while maintaining overall system functionality.
3Ease of repair
If connecting rods are unprotected, then maintenance and repair are easier and more cost-effective, but damage to rods causes malfunction and safety issues
Solution Approach 1:
The connecting rods are nested within the protected environment of the switch stand housing, shielding them from external harmful factors like borrow buildup and foreign objects while maintaining accessibility for maintenance through the housing structure.
Solution Approach 2:
The switch stand housing provides beforehand protection against potential damage from borrow buildup and foreign objects. The housing acts as a preventive barrier that cushions the connecting rods from harmful environmental factors before damage can occur.
Data Source
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AI summary
A railway, tramway or the like turnout of so-called English type, which turnout comprises four points and wherein two tracks cross each other and have one pair of rails (B1, B1' , B2, B2'), which cooperate with first and second pairs of points (A1, A1'; A2, A2') respectively, one point (A2, A1') of each of said first and second pairs of points being located in the middle of the turnout and the other two points (A1, A2') of the two pairs of points being located at the opposed outer areas of the turnout; said turnout comprising a point-controlling switch stand of the type having the form and function of a tie in which motorized means are housed for combined displacement of at least the outer points, and rigid mechanical connecting means being provided for connecting each of the points (A2; A1') in the central area of the turnout, belonging to the first and second pairs of points respectively with one of the outer points (A1, A2') of the other pair of points, which outer point assumes the closed position with the corresponding point in the central area of the stand, a second stand is further provided, having the form and function of a tie, which is designed to be located at a predetermined distance from the first switch stand, and said rigid connecting means are fastened to the corresponding points in such a position that said rigid connecting means extend into said second stand.