Bushing With Segmented Housing For Cable Connection
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Solution Overview
Problem
Existing bar pass devices face difficulties in effective assembly due to inadequate sealing and the need for precise placement of a polymer sleeve during connection, which can lead to disconnection of cables if not properly aligned.
Innovation Solution
A bar pass system with a housing comprising two identical half-shells and a bottom plate, featuring mechanical connection lugs and a current transformer, allowing for secure cable passage and protection without direct contact with the gasket, enabling assembly with cables already connected to the conductive bar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polymer sleeve is used for sealing and protection of the cable connection, then sealing effectiveness and cable protection are improved, but assembly difficulty increases because the sleeve must be placed on the cable before connection
Solution Approach 1:
The housing is divided into two separate half-shells that can be assembled independently around the cable connection. This allows the cable to be connected first, then the half-shells are positioned on either side of the wall and secured with fastening means, eliminating the need to pre-slide a sleeve over the cable.
Solution Approach 2:
Instead of using a linear sleeve that must be slid along the cable axis, the invention uses a three-dimensional housing structure with two half-shells that enclose the cable connection from both sides of the wall. The fastening means secure the half-shells together, providing sealing and protection without constraining the cable connection sequence.
2Object-affected harmful factors
If a polymer sleeve is used for protecting the cable connection, then cable protection is improved, but operational complexity increases due to the critical timing requirement for sleeve placement
Solution Approach 1:
The protective housing is segmented into two independent half-shells that can be assembled after cable connection. This removes the critical timing constraint of the single-sleeve approach, as each half-shell can be positioned and secured independently without requiring precise coordination of sleeve placement relative to cable connection timing.
3Reliability
If the housing directly contacts the gasket for sealing, then sealing integrity is improved, but adaptability decreases because the housing becomes fixed to the gasket structure
Solution Approach 1:
A separate gasket element acts as an intermediary between the housing and the wall opening. The gasket provides the sealing function by contacting the wall, while the housing contacts the gasket rather than the wall directly. This intermediary arrangement allows the housing to be adapted to different wall types and configurations while maintaining sealing integrity through the flexible gasket.
Data Source
AI summary
The bushing (10) has a protecting envelope including a rectilinear conducting bar (14) with an uncovered outer end (22) that is inserted between identical semi-shells (50) of a bell shaped case (18) provided with a rigid polymer structure, where the shells are formed from same mold. Each semi-shell has an open contour arranged transversally with respect to a direction of the bar. A receiving frame (57) integrates the semi-shells on both sides of the bar`s end. The case delimits a passage spout (60) of the bar`s end, where the spout defines a peripheral surface supported on a wall (12).