Safety Connector Isolating Contacts to Prevent Arcing
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Solution Overview
Problem
Industrial environments face risks of explosions due to arcing between electrical connectors, despite compliance with safety standards, as existing connectors do not adequately prevent arcing when power is left on during disconnection in high dust or combustible environments.
Innovation Solution
A safety electrical power connector design that mechanically isolates contacts by forming a gap between connector bodies upon engagement, preventing arcing by ensuring electrical communication only after safe isolation, allowing for safe connect/disconnect without de-energizing power lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If power is left on during uncoupling of connector, then operational continuity is maintained, but arcing can occur between electrical connectors as they disengage leading to explosion risk
Solution Approach 1:
The connector body is designed to form a gap that establishes an isolation enclosure before the electrical contacts engage or disengage. This preliminary isolation action prevents arcing from affecting the surrounding environment, allowing power to remain on during connection/disconnection operations without explosion risk.
Solution Approach 2:
The gap between connector bodies acts as an intermediary isolation barrier. This gap encloses the electrical contacts during engagement and disengagement, serving as a protective mediator that prevents direct exposure of arcing to the external environment while allowing electrical communication to occur.
2Reliability
If gap is formed between connector bodies to isolate electrical contacts, then explosion prevention is achieved, but connector design complexity increases
Solution Approach 1:
The isolation enclosure function is merged with the connector body structure itself. The gap is formed by the relative movement of the connector bodies during engagement, combining the isolation function with the basic connector geometry rather than adding separate isolation components.
Solution Approach 2:
The gap between connector bodies is dynamic, changing as the connectors engage and disengage. The gap is largest when disconnected (providing isolation) and closes as contacts engage, allowing the same structure to provide both isolation during disconnection and electrical connection during engagement.
3Object-affected harmful factors
If mechanical isolation enclosure is formed by gap between connector bodies, then arcing is prevented, but manufacturing precision requirements increase
Solution Approach 1:
The gap distance parameter changes dynamically during connector engagement. The gap is maintained at a safe distance when disconnected to prevent arcing, and closes to enable electrical contact when engaged. This parameter change resolves the contradiction by providing different gap values for different operational states.
Data Source
AI summary
A safety electrical power connector can include a first connector body having a first electrical contact and an outer surface, and a second connector body that engages the first connector body in an axial direction. The second connector body can have a second electrical contact and an inner surface configured to slide relative to the outer surface of the first connector body in the axial direction during engagement of the first and second connector bodies. The outer surface and the inner surface can define a gap therebetween sufficient to establish an isolation enclosure that isolates a volume containing the first and second electrical contacts therein. The gap can be formed prior to electrical communication of the first and second electrical contacts thereby preventing an explosion due to arcing between the first and second electrical contacts.