Rotating Pressure Relief Closure for Vibration-Stable Venting
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Solution Overview
Problem
Existing pressure relief devices in medium and high voltage systems, such as switchgear, face issues with flaps opening due to jolts or vibrations, leading to inadequate closure during normal operation and potential overpressure events like arcs, which can result in insufficient pressure relief.
Innovation Solution
A pressure relief device with a pressure control mechanism featuring movable and rotatable closure elements, locking mediators, and rotation limiters, where gravity or overpressure can trigger the rotation of the closure to open the gas outlet area, ensuring reliable pressure relief during overpressure events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If flaps are used to seal the gas outlet area, then the structure is simple and easy to manufacture, but the flaps may open due to shocks and vibrations during transport and normal operation
Solution Approach 1:
The closure element is designed to be movable rather than fixed, capable of rotating between a closed position (sealing the gas outlet area) and an open position (allowing pressure relief). This dynamic design allows the closure to respond to pressure changes while maintaining reliability during transport through the locking mechanism.
Solution Approach 2:
A locking element acts as an intermediary between the closure element and the pressure guide device, preventing unintended rotation during transport. The locking element engages with the closure element to maintain its position, serving as a mediator that ensures reliability without compromising the ability to open when needed.
2Reliability
If the closure is securely locked to prevent unintended opening, then reliability during transport is improved, but the response time to open during overpressure events may be delayed
Solution Approach 1:
The locking element is designed to be disengageable by the pressure force itself. The locking mechanism prevents unintended opening during transport, but the closure element can rotate against the locking element when pressure force acts on it, ensuring both reliability and rapid response when needed.
Solution Approach 2:
The pressure force generated during an overpressure event automatically disengages the locking element and rotates the closure element to the open position. The system uses its own operational pressure to trigger the opening action, eliminating the need for external actuators or complex control systems.
3Productivity
If the closure element is made rotatable to ensure reliable opening, then pressure relief effectiveness is improved, but the risk of unintended opening during normal operation increases
Solution Approach 1:
The locking element serves as an intermediary that prevents unintended rotation of the closure element during normal operation and transport. It engages with the closure element to maintain its closed position, allowing the closure to be rotatable for effective pressure relief while preventing harmful unintended openings.
Solution Approach 2:
The locking element is positioned to engage with the closure element before any pressure event occurs, pre-preventing unintended rotation during transport and normal operation. This preliminary locking action ensures the closure remains sealed until a genuine pressure relief event requires opening.
4Reliability
If a complex locking mechanism is added to prevent unintended opening, then reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The locking mechanism is segmented into simple, discrete components: a locking element with a locking surface and a closure element with a corresponding engagement surface. This segmentation allows each component to be simple in design while collectively providing reliable locking functionality without excessive complexity.
Solution Approach 2:
The locking mechanism relies on changes in the positional parameters of the closure element (rotated locked vs. rotated open) and the engagement/disengagement of the locking element. This parameter-based approach provides reliable locking without requiring complex mechanical structures, maintaining simplicity while ensuring reliability.
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 provides a reliable and cost-effective pressure relief mechanism that effectively opens to allow pressure release during overpressure events, ensuring the system's safety and integrity by using gravity or overpressure to initiate the rotation of the closure, thus preventing unintentional opening and ensuring defined end states.
Implementation Method 1
in the event of overpressure in the medium- and/or high-voltage installation
Implementation Method 2
the rotation of the pressure guidance device closure can be triggered by gravity and/or overpressure within the pressure guidance device
Data Source
AI summary
The invention relates to a pressure relief device, in particular a pressure relief device for medium- and/or high-voltage installations, comprising: a pressure-conducting device, wherein the pressure-conducting device has one or more gas inlet regions and one or more gas outlet regions; and a pressure-conducting device closure, wherein the pressure-conducting device closure closes the pressure-conducting device and thus the gas outlet region(s) in a first position and said pressure-conducting device closure does not close the pressure-conducting device and thus the gas outlet region(s) in a second position.