Twisted Leak Detection Cable Helix Design
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Solution Overview
Problem
Existing leak detection cables face challenges in effectively detecting moisture leaks due to inadequate exposure of detector conductors to aqueous fluids and potential shorting issues when twisted, leading to reduced sensitivity and reliability.
Innovation Solution
A leak detection cable design featuring a jacket with dissimilar materials to the conductive and non-conductive coatings, allowing partial exposure of detector conductors and using a twisted helix configuration to create a conductive path, along with feedback conductors for location detection, and a connector system for easy installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the detector conductor is fully surrounded by the jacket, then the cable structure is more protected and complete, but the sensitivity to detect aqueous fluids decreases due to inadequate exposure
Solution Approach 1:
The jacket is designed with differentiated coverage: it fully surrounds the feedback conductor for protection while only partially surrounding the detector conductor. This local quality differentiation allows the detector conductor to maintain both protection and exposure to aqueous fluids, resolving the contradiction between cable protection and detection sensitivity.
2Measurement precision
If the cable is twisted into a helix configuration, then the detector conductor exposure to fluids is improved, but shorting between conductors may occur reducing reliability
Solution Approach 1:
The jacket serves as an intermediary protective barrier between the detector and feedback conductors. When the cable is twisted into a helix, the jacket maintains separation between the conductors, allowing the detector conductor to remain exposed to fluids while preventing direct contact that would cause shorting.
3Strength
If the jacket material is similar to the conductive plastic, then the jacket provides better adhesion and protection, but the jacket becomes difficult to remove for installation
Solution Approach 1:
The jacket material is selected to have dissimilar properties to the conductive plastic, creating low adhesion between them. This local quality differentiation at the jacket-conductor interface allows the jacket to be easily removed during installation while still providing adequate protection during service.
Data Source
AI summary
Disclosed is a leak detection cable that has an outer jacket layer and a four wire construction in a flat wire configuration that is twisted in a helix. Detection cables are disposed on the exterior surface adjacent openings of the jacket to allow for detection of aqueous fluids. The wire is twisted in a helix to allow adjacent detector wires to easily detect aqueous fluids. Disparate materials are used for the jacket and the coatings of the wires, to allow the jacket to be easily removed from the wires without affecting the integrity of the coatings of the wires. The four flat wire configuration is sized and spaced for easy connection to an insulation displacement connector.