Telecommunications Enclosure O-Ring Channel to Prevent Seal Extrusion
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Solution Overview
Problem
Existing telecommunications enclosures face challenges in maintaining effective sealing and preventing seal extrusion during re-entry access, which can compromise the integrity of the enclosure.
Innovation Solution
The design incorporates a seal channel with an angled bottom surface and outer circumferential lip to contain an O-ring seal, along with flanges and a clamp channel to ensure secure mounting and compression, enhancing seal reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple seal channel design is used, then manufacturing is easier, but seal reliability deteriorates due to potential extrusion during re-entry access
Solution Approach 1:
The seal channel incorporates specific geometric features (angled bottom surface, outer circumferential lip) at critical locations to prevent O-ring extrusion while maintaining simple overall design. The angled bottom surface and lip are strategically positioned where extrusion pressure occurs during re-entry access, providing localized reinforcement without complicating the entire seal channel structure.
Solution Approach 2:
The seal channel features curved surfaces including an angled bottom surface and an outer circumferential lip that projects upwardly. These curved geometric elements are designed to conform to the O-ring cross-section and distribute compression forces evenly, preventing extrusion while maintaining manufacturing simplicity through standard machining operations.
2Reliability
If the O-ring seal is compressed to provide sealing, then sealing effectiveness is improved, but the O-ring may extrude from the seal channel
Solution Approach 1:
The seal channel includes an outer circumferential lip that projects upwardly from the channel bottom surface to create a containment barrier before extrusion can occur. This preliminary structural feature opposes and prevents the harmful extrusion action by providing a physical stop that the compressed O-ring cannot overcome, even under high compression conditions during re-entry access.
Solution Approach 2:
The angled bottom surface of the seal channel is specifically designed to distribute compression forces and prevent the O-ring from being forced outward. This localized geometric feature addresses the extrusion problem at the critical point where compression forces are applied, allowing effective sealing without extrusion.
3Reliability
If flanges and clamp channel are added to secure mounting, then enclosure integrity is improved, but device complexity increases
Solution Approach 1:
The mounting structure combines the upper dome, lower base with seal channel, flanges, and clamp channel into an integrated assembly. The flanges extend circumferentially from both the upper dome and lower base to engage with the clamp channel, creating a unified mounting system that secures the enclosure while maintaining structural simplicity through combined elements rather than separate components.
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 enhanced sealing and containment of the O-ring seal, preventing extrusion and maintaining enclosure integrity during re-entry access.
Implementation Method 1
an O-ring seal that mounts in the seal channel and may be compressed between the upper dome and the lower base to provide sealing thereinbetween
Data Source
AI summary
A telecommunications enclosure is disclosed. In one example, the telecommunications enclosure includes an upper dome and a lower base. An O-ring seal can be compressed between a scaling surface of the upper dome and/or a sealing surface of the lower base to provide scaling thereinbetween.