Fabric-Sleeved Cable With Wings for Low-Friction Conduit Insertion
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Solution Overview
Problem
Positioning additional cables in underground communication conduits with existing cables causes friction damage due to the plastic jacket, especially in small diameter conduits where fabric innerducts occupy space and tapes/ropes may lock up, hindering cable insertion.
Innovation Solution
Attaching a fabric material to a cable using an adhesive, forming a wrapped cable with outwardly extending wings for easier insertion by providing additional strength and attachment points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a plastic-jacketed cable is positioned in a conduit, then the cable is protected and structurally sound, but it creates high friction that damages both the existing and new cables during insertion
Solution Approach 1:
A fabric sleeve is introduced as an intermediary component between the cable and the conduit environment. The fabric sleeve wraps around the cable and provides a low-friction surface that allows the cable to slide through the conduit easily, while the cable's plastic jacket remains intact and protected from direct contact with the conduit walls and other cables.
2Object-affected harmful factors
If a fabric innerduct is used in small diameter conduits, then friction is reduced, but the innerduct occupies too much space and tapes/ropes lock up, impeding cable pulling
Solution Approach 1:
The harmful frictional interface is extracted from the conduit environment and transferred to the cable surface itself through the fabric sleeve. This eliminates the need for a separate fabric innerduct in the conduit, freeing up conduit space while still providing the low-friction benefit. The fabric sleeve is attached directly to the cable, so it does not occupy conduit space independently.
3Strength
If adhesive is applied to fabric layers to attach them to the cable, then the fabric is securely confined, but the adhesive must be precisely positioned on opposed layers
Solution Approach 1:
The adhesive application is segmented into discrete locations on the fabric layers rather than requiring continuous or widespread adhesive coverage. The adhesive can be applied at specific intervals or zones, reducing the precision requirements while still achieving secure attachment of the fabric sleeve to the cable.
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 fabric-wrapped cable with wings reduces friction and facilitates smooth cable insertion into conduits, enhancing installation efficiency and reducing damage.
Implementation Method 1
positioning an adhesive on opposed layers of fabric, positioning a cable between the layers, and attaching the adhesive of one layer to the adhesive of the other layer to confine the cable between the layers
Data Source
AI summary
A fabric wrapped cable is formed by positioning adhesive on opposed layers of fabric. A cable is positioned between those layers and the layers are attached by attaching the adhesive of one layer to the adhesive of the other layer. In forming the wrapped cable in such a manner, the cable is provided with at least one wing.