Cold-Shrink Cable Splice Cover With Conformable Insulation Layer
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Solution Overview
Problem
Existing electrical connections, particularly those formed in the field, are vulnerable to environmental hazards such as moisture and sharp objects, which can compromise cable integrity and lead to power outages or safety risks.
Innovation Solution
A pre-expanded cover assembly comprising a tubular, cold-shrinkable elastomeric splice body with a conformable medium and a removable holdout, where the holdout maintains the splice body in an expanded state, allowing it to radially contract onto the cable splice connection, interposing the conformable medium between the splice body and cable insulation for enhanced protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a bare metal surface is exposed during electrical connections, then the connection can be formed, but the cable integrity is compromised due to environmental exposure
Solution Approach 1:
The patent applies preliminary action by pre-assembling the cover components (splice body, conformable medium, and holdout) into a complete protective assembly before field installation. This allows the protective structure to be ready in advance, eliminating the need to form bare metal connections and then separately apply protection. The pre-assembled unit is simply positioned over the connection and activated by removing the holdout, ensuring cable integrity is maintained throughout the connection process.
2Reliability
If a protective cover is applied to protect the connection, then cable integrity is maintained, but the installation process becomes more complex
Solution Approach 1:
The patent merges multiple protective components (splice body, conformable medium, and holdout mechanism) into a single integrated pre-assembled cover unit. This combination simplifies installation by reducing the number of separate components that need to be handled and assembled in the field. The merged design allows the entire protective structure to be installed as one unit, offsetting the inherent complexity of the multi-component system through streamlined assembly.
Solution Approach 2:
The holdout mechanism provides self-service functionality by automatically maintaining the cover in an expanded protective state during installation and then enabling self-activation through its removal. The holdout serves dual purposes: it structurally supports the cover during handling and installation, then its removal automatically triggers the contraction and sealing action, eliminating the need for additional activation steps or tools.
3Manufacturing precision
If the splice body is maintained in an expanded state during installation, then the conformable medium can be properly positioned, but the splice body occupies more space
Solution Approach 1:
The patent applies dynamics by designing the splice body to transition from an expanded state during installation to a contracted state during operation. The elastic material allows the splice body to be temporarily expanded to facilitate proper positioning of the conformable medium and cable insulation, then automatically contracts to its compact operational form after the holdout is removed. This dynamic volume change resolves the contradiction between needing space for precise positioning and minimizing occupied space during service.
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 solution provides robust electrical insulation and protection against environmental factors, reducing the risk of dielectric breakdown and enhancing the reliability of electrical connections by eliminating air voids and contaminants at the interface, thus improving cable integrity.
Implementation Method 1
The splice body is mounted on the holdout such that the holdout maintains the splice body in an elastically radially expanded state, and the holdout is selectively removable from the splice body to permit the splice body to elastically radially contract
Implementation Method 2
The splice body assembly further includes a tubular layer of a conformable medium pre-mounted on the interior surface of the splice body. The conformable medium is a flowable material having a high electrical permittivity
Data Source
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AI summary
A pre-expanded cover assembly for protecting a cable splice connection including a cable, the cable including an electrical conductor surrounded by a cable insulation layer, includes a splice body assembly and a removable holdout. The splice body assembly includes a tubular, cold-shrinkable, electrically insulative, elastomeric splice body having an interior surface defining an interior passage. The splice body assembly further includes a tubular layer of a conformable medium pre-mounted on the interior surface of the splice body. The conformable medium is a flowable material having a high electrical permittivity. The splice body assembly is mounted on the holdout such that the holdout maintains the splice body in an elastically radially expanded state, and the holdout is selectively removable from the splice body to permit the splice body to elastically radially contract. The layer of the conformable medium is positioned and configured such that, when the pre-expanded cover assembly is positioned adjacent the cable splice connection, the holdout is removed from the splice body, and the splice body elastically radially contracts onto the cable splice connection, the layer of the conformable medium will be radially interposed between and engage each of the interior surface of the splice body and an opposing interface surface of the cable insulation.