Bidirectional Flap Sealing for Switchgear Pressure Isolation
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Solution Overview
Problem
Existing closure devices for switchgear fail to ensure operational reliability by not effectively preventing pressure transfer between adjacent functional spaces in case of faults, as they only close the through-opening from one direction, leaving the other space vulnerable to pressurization and potential damage.
Innovation Solution
A bidirectional closure device is designed with two through-opening areas and a flap that can bend to close either opening depending on the source of pressure, ensuring secure closure regardless of the fault's location, utilizing a bulkhead and partition plate with offset slot arrangements for the flap to facilitate air exchange during normal operation and secure sealing during faults.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single through-opening area with a flap is used for closing, then the device complexity is reduced, but the reliability is insufficient because pressure transfer from the second functional space cannot be prevented
Solution Approach 1:
The through-opening is divided into two separate through-opening areas (first and second) positioned at different locations. Each area can be independently closed by the flap when pressure is applied from the respective functional space, ensuring that pressure transfer is prevented from both directions while maintaining a relatively simple overall structure.
Solution Approach 2:
The single flap is designed to perform multiple functions: it can close the first through-opening area when pressure is applied from the first functional space, and it can close the second through-opening area when pressure is applied from the second functional space. This multi-functional design prevents pressure transfer from either direction without requiring separate closure mechanisms for each direction.
2Ease of operation
If the flap is made flexible to enable bending for closure, then the ease of operation is improved, but the manufacturing precision becomes more difficult to ensure
Solution Approach 1:
The flap is constructed as a flexible element that can bend and deform to seal the through-opening areas. This flexibility allows the flap to respond naturally to pressure differential forces, automatically closing the openings when pressure is applied from either functional space without requiring complex actuation mechanisms.
Solution Approach 2:
The flap transitions from a static barrier to a dynamic element that can change its configuration based on operating conditions. When pressure is applied, the flap bends toward the lower-pressure side to seal the opening; when pressure equalizes or reverses, the flap returns to its original position, allowing automatic bidirectional operation.
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 bidirectional closure device effectively prevents pressure transfer between adjacent functional spaces, enhancing operational reliability by securely sealing through-openings from either direction, thus minimizing damage from pressurization events.
Implementation Method 1
when pressure is applied from the first functional space, the first through-opening region is closed by the flap
Implementation Method 2
the flap having a first end between the bulkhead and the bulkhead plate is attached bendable
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The aim of the invention is to develop a closing device (10, 11, 12, 13) for closing a through-opening (6, 7, 8, 9) between a first functional area (2) and a second functional area (3) of a switchgear (1), comprising a first through-opening region (14) and a flap (18) for closing the first through-opening region (14) when pressure is applied from the first functional area (2), said closing device ensuring an increased operating reliability of the switchgear while having a compact design. This is achieved in that a second through-opening region (17) of the through-opening (6, 7, 8, 9) is provided such that the second through-opening region (17) of the through-opening (6, 7, 8, 9) is designed to be closed by the flap (18) when pressure is applied from the second functional area (3).