Cable Sheath Segmentation and Ramps for Clean Core Separation
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Solution Overview
Problem
Existing methods for separating the core and sheath of a cable often result in contamination transfer from the sheath to the core, particularly in environments where the cable is contaminated with radioactive substances.
Innovation Solution
A device comprising at least two knives configured to cut the sheath over its whole thickness, forming mechanically dissociated portions, and ramps that modify the movement path of the sheath portions to maintain separation from the core, thereby reducing contamination transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single groove is formed by a knife followed by a spreader to detach the sheath and core, then the separation process can be performed, but the core may be contaminated by pollution from the sheath during the winding process
Solution Approach 1:
The patent divides the sheath into multiple segments using multiple knives positioned at different angular positions around the cable. This segmentation allows each sheath portion to be separated independently, preventing contamination transfer to the core during the separation process.
Solution Approach 2:
The patent introduces deflectors as intermediary elements that guide the separated sheath portions away from the core. These deflectors act as mediators between the cutting knives and the core, ensuring that the sheath portions are directed to safe zones without contacting the core.
2Reliability
If a laser beam is used to cut the sheath, then the cutting means can be physically separated from the sheath to avoid polluting the laser source, but the radioactive contamination risk is still present and the process requires precise energy adjustment
Solution Approach 1:
The patent replaces the laser-based mechanical cutting system with a purely mechanical knife-based cutting system. This substitution eliminates the need for precise energy adjustment and provides more reliable physical separation, as the knives directly cut the sheath without thermal effects or complex energy control requirements.
3Ease of operation
If the sheath is heated to make it easier to open by a frustum-shaped spreader, then the gouging operation is facilitated, but the process is complicated and contamination transfer risk remains
Solution Approach 1:
The patent extracts the heating function from the separation process entirely. Instead of heating the sheath to facilitate opening, the design uses multiple knives to cut the sheath directly at room temperature, eliminating the heating step and its associated complexity while maintaining effective separation.
4Productivity
If two knives are used to cut the sheath, then the separation efficiency is improved, but the device complexity increases compared to a single knife system
Solution Approach 1:
The patent combines multiple knives and their associated deflectors into an integrated modular unit that can be adjusted as a single assembly. This merging approach allows the system to achieve high separation efficiency with multiple cutting elements while managing device complexity through unified design and adjustment mechanisms.
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 device effectively separates the core and sheath while minimizing the transfer of pollutants from the sheath to the core, ensuring cleaner separation and reducing the risk of contamination in sensitive environments.
Implementation Method 1
at least two knives configured to cut the sheath over its whole thickness and to form at least two portions of the sheath mechanically dissociated from one another
Implementation Method 2
at least two ramps configured to maintain the separation between at least two portions of the sheath and to mechanically separate the sheath and the core up to the outlet by modifying the movement path of at least two portions of the sheath differently with respect to the feed axis
Data Source
AI summary
A device for separating a core and sheath of cable includes an apparatus delivering the cable along cable feed axis parallel to longitudinal axis of cable. Two knives cut sheath to two portions mechanically dissociated from one another. Each knife cuts sheath over its whole thickness in radial cutting zone with respect to central axis of the cable. Two blockers extend the knives in the direction of the feed axis of the cable and keep the core in position along the feed axis of the cable. At least one ramp extends from each knife in a second direction perpendicular to the radial cutting zone and to the feed axis of the cable. The ramp has an outer surface extending away from the cable feed axis in the first direction when movement takes place in the feed direction of the cable to separate the core and the portions of the sheath.