Cable Sleeving Mechanism for Low-Friction Conduit Installation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Positioning additional cables into underground communication conduits with existing cables is challenging due to friction, especially when the existing cables are undulating, causing damage and difficulty in installation.
Innovation Solution
A device that applies a friction-reducing sleeve to a cable as it is introduced into a conduit, using a mechanism that aligns and secures the sleeve around the cable with attachment members, allowing for a one-step installation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cable is inserted into a conduit with existing cables, then cable installation is achieved, but friction between cables causes damage and installation difficulty
Solution Approach 1:
A fabric sleeve acts as an intermediary between the cable and the conduit environment. The sleeve is positioned around the cable before insertion, providing a low-friction interface that reduces contact between the cable jacket and surrounding cables or conduit surfaces, thereby facilitating easier cable installation while protecting against friction-induced damage
Solution Approach 2:
The friction coefficient is changed by introducing a fabric sleeve with different material properties than the cable jacket. The sleeve's fabric surface provides a lower coefficient of friction compared to the plastic cable jacket, fundamentally altering the friction parameter to enable smoother cable insertion into the conduit
2Object-affected harmful factors
If a fabric innerduct is installed first to divide the conduit, then cable installation friction is reduced, but the installation process becomes two-step and more complex
Solution Approach 1:
The fabric sleeve and cable are combined into a single integrated unit before insertion. Instead of installing the innerduct separately and then inserting the cable, the sleeve is pre-positioned on the cable, merging two separate installation operations into one unified process, thereby reducing procedural complexity while maintaining friction reduction benefits
Solution Approach 2:
The fabric sleeve is preliminarily positioned around the cable at the installation site before the cable is inserted into the conduit. This preliminary action ensures the low-friction interface is already in place, eliminating the need for a separate innerduct installation step and simplifying the overall installation process to a single cable insertion operation
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
Facilitates easy and efficient insertion of cables into conduits by reducing friction, minimizing damage to both new and existing cables, and enabling a seamless installation process.
Implementation Method 1
a fabric sleeve, having a coefficient of friction less than that of a cable, is provided around the sleeve
Data Source
AI summary
A fabric sleeve in the form of a strip of material having compatible attachment members along its lateral edges, is applied to a cable by a device located at a site where the cable can be introduced into a conduit. The device includes a beam carried by a post. The beam carries a plurality of formers which receive the sleeve and the cable from rolls and which progressively fold the sleeve around the cable. The beam also carries an attachment device which receives the sleeve and cable from the formers and which connects the attachment members of the sleeve to confine the cable therein. The attachment device can be opened so that the sleeved cable can be removed. The device is operated at the site until the sleeved cable reaches a downstream installation site and the process is repeated at that downstream site.