Movable Fairlead Winch for Cable Barrier Tensioning
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Solution Overview
Problem
Installing and tensioning long lengths of cable in cable barrier systems along roadways is challenging due to their weight, which can damage posts and connectors, affecting the operational strength of the system.
Innovation Solution
A winch system with a vertically movable fairlead and a frame assembly that includes a spool, rollers, and a track system to adjust cable height and tension, along with anchoring components to stabilize the system during installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If long lengths of cable are used to extend the cable barrier system along roadways, then the coverage distance and safety protection range are improved, but the cable weight increases making installation and tensioning difficult and potentially damaging to posts and connectors
Solution Approach 1:
The fairlead is made vertically movable along a trackway instead of being fixed, allowing dynamic adjustment of cable height during installation and tensioning operations. This enables the system to adapt to different cable lengths and weights while protecting posts and connectors from damage
Solution Approach 2:
The winch system acts as an intermediary device between the cable and the barrier posts, providing controlled tensioning and height adjustment. This intermediary mechanism distributes the stress and weight management functions, preventing direct damage to posts and connectors while handling long cable lengths
2Reliability
If the cable is tensioned to provide effective barrier protection, then the safety performance is improved, but the risk of damaging posts and connectors increases
Solution Approach 1:
The vertically movable fairlead allows real-time adjustment of cable height and tension application point, enabling operators to tension the cable effectively while monitoring and preventing excessive forces that could damage posts and connectors
Solution Approach 2:
The winch system provides controlled, gradual tensioning capability before full barrier protection is achieved, allowing incremental tensioning that cushions against sudden force spikes that could damage structural components
3Manufacturing precision
If the cable height is adjusted during installation, then the proper installation at designated height is improved, but the system complexity increases
Solution Approach 1:
The fairlead moves along a vertical trackway with a bracket system that provides guided, constrained motion. This dynamic structure achieves precise height adjustment capability while maintaining relatively simple mechanical guidance through the trackway and bracket design
Data Source
AI summary
A winch system for tightening and tensioning barrier cables for cable barrier systems includes a fairlead vertically movable with respect to the winch assembly. The winch system is connected to a base frame that can be attached to a vehicle for moving and for providing power to the winch and movement of the fairlead. The vertically movable fairlead allows each barrier cable to be positioned and tensioned while supported by the post of the cable barrier system to avoid damage to the posts and negatively impacting the operational strength of the cable barrier system.