Minerally Insulated Cable Connector With Flexible Cushioning
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Solution Overview
Problem
Minerally insulated cables are notoriously difficult to terminate and connect reliably, with existing methods often resulting in damaged terminations that are unreliable and prone to damage.
Innovation Solution
An electrical connector assembly featuring a pot seal arrangement, cable alignment plate, and backshell that cooperatively engage to ensure secure and reliable connection of minerally insulated cables, providing improved robustness and damage resistance, along with optional attachment members for additional heat and environmental resistance and EMC shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pot seals are used to connect and terminate minerally insulated cables, then electrical connection is achieved, but the terminations are easily damaged and rendered unreliable
Solution Approach 1:
The patent introduces a flexible element positioned between the rigid backshell and the pot seal termination to absorb and cushion mechanical stresses before they reach the vulnerable termination point. This flexible element acts as a shock absorber, preventing damage from thermal expansion, vibration, and mechanical shocks that would otherwise compromise the reliability of the MI cable connection.
Solution Approach 2:
The patent employs a flexible intermediate element as a mediator between the rigid structural components (backshell) and the vulnerable termination point (pot seal). This intermediary component transfers and distributes mechanical loads, preventing concentrated stresses from damaging the termination while maintaining the structural integrity of the overall assembly.
2Strength
If rigid structural components are used to secure MI cable connections, then mechanical strength is improved, but the connection becomes more susceptible to thermal stress and vibration damage
Solution Approach 1:
The patent changes the physical parameter of the support element from rigid to flexible, allowing it to dynamically adapt to thermal expansion and contraction as well as vibration forces. This flexibility enables the structure to maintain mechanical strength while accommodating environmental variations, thereby improving reliability under thermal stress and vibrational conditions.
Solution Approach 2:
The patent creates a composite structure combining rigid components (backshell for structural strength) with flexible elements (for stress absorption and vibration damping). This composite approach allows the assembly to simultaneously achieve high mechanical strength and resistance to thermal stress and vibration, resolving the contradiction between strength and environmental durability.
3Quantity of substance
If multiple individual connectors are assembled into a large connector assembly, then connection capacity is increased, but the complexity of ensuring proper alignment and orientation increases
Solution Approach 1:
The patent incorporates pre-formed alignment features and keyways directly into the backshell structure during manufacturing. These alignment features are prepared in advance to guide multiple connectors into their correct positions and orientations, eliminating the need for complex alignment procedures during assembly and reducing the overall complexity of the multi-connector assembly process.
Solution Approach 2:
The backshell is designed as a universal housing that integrates multiple functions: structural support, alignment guidance, orientation control, and stress distribution. This multi-functional design simplifies the overall system by consolidating what would otherwise require separate components, thereby increasing connection capacity while managing alignment and orientation complexity within a single integrated structure.
Data Source
Figure 1~2
Figure 3~4
Figure 5a~5d
AI summary
An electrical connector assembly for the electrical connection of one or more minerally insulated cables (11), the assembly comprising a pot seal arrangement (10) arranged in use to connect the minerally insulated cable (11) to a connector (22); at least one cable alignment plate (21, 31); and, a backshell (20) shaped so as to contain the pot seal (10) and cable alignment plate (21); the cable alignment plate (21) and pot seal (10) being arranged so as to locate within the backshell (20) such that in use, connecting the backshell (20) to the connector (22) forces the backshell (20), cable alignment plate (21) and pot seal (10) into a cooperative engagement.