Arc-Prone Enclosure Flap Sealing Mechanism
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Solution Overview
Problem
Existing electrical component enclosures are inefficient in containing arc-induced gas pressures and arc debris, leading to potential safety hazards and escape of harmful gases during arcing events.
Innovation Solution
The design incorporates a sealed enclosure with a door featuring flaps that are angled relative to a sealing surface, capable of flexing from a disengaged to an engaged position in response to pressure buildup, providing a tight seal during arcing events by contacting the sealing surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a typical enclosure door overlaps a face frame of an opening when closed, then ease of manufacture and simple structure are achieved, but the door is inefficient at containing arcs and arc debris under pressure
Solution Approach 1:
The flap is designed to be movable rather than fixed, allowing it to dynamically respond to pressure changes. During normal operation, the flap remains in a neutral position for easy access, but during an arcing event, the pressure differential causes the flap to automatically deflect and seal against the sealing surface, dynamically adapting to containment needs
Solution Approach 2:
The invention converts the harmful high pressure generated during arcing into a beneficial sealing force. The pressure differential created by the arc event acts upon the flap to force it against the sealing surface, transforming the harmful pressure into the mechanism that achieves effective containment of arc debris and gases
2Reliability
If the door is designed to limit arcing products and hot gases from escaping, then safety is improved, but the door becomes less efficient at containing arc-induced gas pressures
Solution Approach 1:
The flap acts as a flexible sealing element that can deform under pressure. This flexibility allows the seal to maintain contact with the sealing surface even under the high pressures generated during arcing events, effectively preventing the escape of arc debris and gases while still allowing the door to be opened when needed
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
This solution effectively limits the egress of arc debris and gases, enhancing safety by maintaining a secure enclosure environment during electrical arcing events, even under high pressures.
Implementation Method 1
the one or more flaps being operational to flex from a disengaged position when not under pressure, to an engaged position in contact with the sealing surface when exposed to pressure inside the case during an arcing event
Data Source
AI summary
A sealed enclosure is disclosed. Sealed enclosure has a case configured to receive an arc-prone electrical component, a face frame defining an opening, a door configured to cover the opening, a sealing surface on the face frame or on the door, and one or more flaps having an sealing portion, the sealing portion being angled relative to the sealing surface, the one or more flaps being operational to flex from a disengaged position when not under pressure, to an engaged position in contact with the sealing surface when exposed to pressure inside the case during an arcing event. Sealed enclosure doors and methods of sealing an enclosure during an arcing event are also provided, as are other aspects.