Arc-Resistant Door Vent Flap for Airflow and Automatic Sealing
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Solution Overview
Problem
Conventional arc-resistant compartments in the power generation/distribution industry lack adequate ventilation due to limited openings, which can lead to insufficient airflow and increased temperature rise during arcing events.
Innovation Solution
A door with a vent flap structure that includes a flap member movable between open and closed positions, biased by a spring structure and retained in the open position by a handle structure, automatically closes during an arcing event due to internal pressure and spring force, ensuring effective sealing and airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional fixed openings are provided in the compartment, then air flow into the compartment is limited, but the compartment configuration remains simple
Solution Approach 1:
The patent applies the dynamics principle by replacing fixed openings with movable flap members that can dynamically adjust their position between open and closed states. The flap members are coupled to the door and can rotate about hinges, allowing the ventilation area to vary based on operational requirements rather than being fixed at a single value.
Solution Approach 2:
The patent implements parameter changes by modifying the ventilation area parameter through the movement of flap members. The effective opening area can change from fully open to fully closed positions, allowing the system to adapt ventilation quantity dynamically rather than maintaining a constant parameter.
2Object-generated harmful factors
If the compartment is sealed during arcing events, then gas leakage is prevented, but temperature rise during normal operation increases
Solution Approach 1:
The patent uses dynamics by implementing automatically actuating mechanisms that respond to arcing conditions. The flap members are coupled to actuators that detect arcing events and automatically transition the flaps from open to closed positions, providing dynamic protection rather than a static sealed or open state.
Solution Approach 2:
The patent extracts the ventilation function from the door structure by using separate, independently controllable flap members. This allows the ventilation function to be separated from the door's primary sealing function, enabling independent control of air flow and gas containment.
3Quantity of substance
If vent flap structure is added to the door, then airflow is enhanced, but the door structure complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the door into multiple functional segments: the main door body and separate flap members. Each flap member is an independent component that can be controlled separately, allowing modular addition of ventilation functionality without redesigning the entire door structure.
Solution Approach 2:
The patent implements multi-functionality by designing the door assembly to serve multiple purposes: the door provides access and structural containment, while the integrated flap members provide controllable ventilation. The same door structure thus achieves both security/access control and adjustable ventilation functions.
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 enhances airflow into the compartment, minimizing temperature rise and preventing gas leakage during arcing events by automatically sealing the opening, thus improving the arc-resistant compartment's performance.
Implementation Method 1
Spring structure is engaged with the flap member and is constructed and arranged to bias the flap member to the closed position
Implementation Method 2
during an arcing event in the compartment, pressure within the compartment together with the bias of the spring structure overcomes the retaining force to automatically move the flap member to the closed position
Data Source
AI summary
A door for an arc-resistant compartment includes an opening there-through. Flap structure includes a flap member coupled to the door and movable between an opened position permitting air to pass through the opening, and a closed position covering the opening. Spring structure is engaged with the flap member to bias the flap member to the closed position. Handle structure is coupled to the flap member and extends through the door for moving the flap member to the opened position against the bias of the spring structure. Retaining structure provides a retaining force on the flap member to retain the flap member in the open position, against the bias of the spring structure. During an arcing event in the compartment, pressure within the compartment together with the bias of the spring structure overcomes the retaining force to automatically move the flap member to the closed position.