Telecom Cable Seal Pressurization for Leak Retention
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Solution Overview
Problem
Existing cable seals in telecommunications systems face challenges in maintaining effective sealing and pressure retention when the enclosures are opened, leading to potential leaks and reduced reliability.
Innovation Solution
A cable seal with a volume of sealing gel and a pressurization arrangement that includes asymmetrically positioned actuator shafts and reinforcing structures, along with pressurization plates and a latch mechanism, to ensure uniform pressurization and containment of the sealing gel, even when the enclosure is opened.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a cable seal uses a simple pressurization structure, then the device complexity is reduced, but the sealing reliability deteriorates when enclosures are opened
Solution Approach 1:
The pressurization structure is segmented into multiple independent components: a first pressurization plate, a second pressurization plate, and a pressurization element positioned between them. This segmentation allows each component to perform its specific function independently, maintaining sealing reliability while managing complexity through modular design. The pressurization element can be actuated separately from the enclosure opening/closing mechanism.
Solution Approach 2:
The pressurization structure is nested within the cable seal assembly, which itself is nested within the enclosure. The first and second pressurization plates are positioned within the cable seal housing, creating a nested configuration where the pressurization mechanism is contained within the existing enclosure structure. This nesting approach maintains reliability without adding significant external complexity.
2Stability of the object's composition
If the actuator shaft is asymmetrically positioned, then uniform pressurization of sealing gel is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The actuator shaft is intentionally positioned asymmetrically relative to the cable seal assembly, with the shaft offset from the centerline. This asymmetric positioning compensates for the natural deformation patterns of the sealing gel and cable assembly, ensuring that pressure is distributed uniformly across the sealing interface. The asymmetry is designed into the structure to achieve better pressurization uniformity than a centered configuration would provide.
Solution Approach 2:
The pressurization force is applied with varying intensity at different locations through the asymmetric shaft positioning. The first and second pressurization plates are designed with specific geometric features that concentrate or distribute pressure locally depending on the required sealing characteristics. This local quality adjustment ensures uniform overall pressurization while accommodating manufacturing tolerances.
3Stability of the object's composition
If reinforcing structures like gussets are added to pressurization plates, then pressurization uniformity improves, but device complexity increases
Solution Approach 1:
Reinforcing structures such as gussets are pre-integrated into the pressurization plates during manufacturing, rather than being added as separate components. The gussets are formed as part of the plate structure, providing the necessary rigidity and pressure distribution features before the assembly is installed. This preliminary integration maintains pressurization uniformity while minimizing the number of discrete parts.
Solution Approach 2:
The reinforcing structures are merged with the pressurization plates to form integrated components. Rather than being separate attachments, the gussets and ribs are combined with the plate bodies, creating unified structures that provide both pressurization function and structural reinforcement. This merging reduces the total component count while maintaining pressurization uniformity.
Data Source
AI summary
The present disclosure relates to a cable seal for use in a telecommunications enclosure. The cable seal can include various features such as an offset actuator for pressurizing the seal, a latch for securing the seal in a pocket of an enclosure, a gel containment extension for covering a portion of a perimeter of a volume of gel of the seal, a gel interlock feature and/or a feature for adjusting the gel volume of the seal.