Switchgear Safety Valve for Barrier Plate Overpressure Relief
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Solution Overview
Problem
Existing pressure barrier plates in switchgear are vulnerable to damage during transportation due to reduced pressure withstand capability when not mounted with a counter flange, and prior solutions involving additional flange rings increase costs and impact layout dimensions.
Innovation Solution
A safety valve with a longitudinal sleeve, pin, and compression springs that maintain pressure integrity during transportation by allowing gas release when overpressure occurs, and reseal when pressure normalizes, without requiring additional flange rings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an additional flange ring is used to hold the barrier plate during transportation, then the pressure withstand capability is improved, but the device complexity and cost increase
Solution Approach 1:
The invention extracts the essential function of the flange ring (providing support during transportation) and implements it through a simpler mechanism: a support element that engages with a recess in the barrier plate. This eliminates the need for the complex additional flange ring structure while maintaining the pressure withstand capability during transport.
Solution Approach 2:
The support element is designed as a simple, inexpensive component that is easily replaceable. It serves its purpose during transportation and can be removed or replaced without affecting the permanent flange structure, effectively acting as a temporary solution for the transportation phase only.
2Strength
If an additional flange ring is mounted on the flange, then the barrier plate can maintain full design pressure, but the layout dimensions are increased
Solution Approach 1:
The support element is nested within the existing flange structure and engages with a recess in the barrier plate itself. This nested arrangement allows the support function to be integrated into the existing dimensions without adding external protrusions that would increase the overall layout footprint.
3Ease of operation
If the barrier plate is mounted on one flange without counter flange during transportation, then the assembly is simplified, but the pressure withstand capability is significantly reduced
Solution Approach 1:
The support element acts as an intermediary component that provides the missing support function when the counter flange is absent during transportation. It mediates between the single flange and the barrier plate, enabling the simplified assembly configuration to temporarily achieve adequate pressure withstand capability.
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
Prevents damage to pressure barrier plates during transportation and assembly, maintaining pressure integrity without additional costs or layout disruptions, and ensuring safe operation under varying pressure conditions.
Implementation Method 1
at least one compression spring surrounding said pin, in compression between said sleeve and said pin
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a safety valve for a pressure barrier plate (7) of a gas insulated switchgear, comprising a longitudinal sleeve (2) extending along an axis (AA') and having a 1st end (23) and a 2rd end (25), a pin (1) extending in said sleeve between a 1st end (11) and a 2nd end (13), said 1st end (11) of said pin bearing a 1st end cap (10), said 2nd end (13) of said pin bearing a 2nd end cap (3), a 1st compression spring (4) in a 1st compartment (28) inside said sleeve, a 2nd compression spring (5) in a 2nd compartment (29) inside said sleeve, said 1st spring (4) and said 2nd spring (5) respectively pushing said 2nd end cap (3) and said 1st end cap (10) towards opposite directions along said axis (AA').