Permanent Magnet Arc Extinction Device Insulation Jacket
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Solution Overview
Problem
Existing permanent magnet extinguishing devices for switch disconnector contact systems in gas-insulated switchgear face issues with incomplete insulation of metallic components, inaccurate positioning, high assembly effort, and potential corrosion, leading to unreliable and slow arc extinction.
Innovation Solution
A permanent magnet extinguishing device with a one-piece insulation jacket covering all metallic components except the arc trajectory, ensuring precise positioning and complete insulation, reducing assembly complexity and preventing corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate insulation components (cover ring and plastic cover part) are used to insulate metallic components, then insulation is provided, but the insulation is incomplete and positioning is inaccurate
Solution Approach 1:
The patent merges the cover ring and plastic cover part into a single integrated insulating housing that completely encloses all metallic components. This one-piece structure eliminates gaps and positioning errors between separate components, providing complete insulation and precise component positioning simultaneously, thereby resolving the contradiction between reliability and manufacturing precision.
2Reliability
If separate insulation components are used, then insulation is provided, but assembly effort is high
Solution Approach 1:
The patent combines multiple separate insulation components into a single integrated insulating housing. This reduces the number of assembly steps and eliminates the need for complex locking mechanisms between separate parts, significantly reducing assembly effort while maintaining complete insulation and reliable arc extinction.
3Ease of manufacture
If metallic components are exposed, then manufacturing is simpler, but corrosion protection is insufficient
Solution Approach 1:
The integrated insulating housing completely encloses all metallic components, providing comprehensive corrosion protection while maintaining manufacturing simplicity. The single-piece design eliminates the need for multiple protective coatings or complex assembly of protective elements, offering both corrosion resistance and ease of manufacture.
4Stability of the object's composition
If separate insulation components with locking means are used, then fixation is provided, but device complexity increases
Solution Approach 1:
The patent integrates all insulation and fixation functions into a single housing structure, eliminating the need for separate locking means and multiple insulation components. This reduces device complexity while maintaining stable component fixation and complete insulation, resolving the contradiction between stability and complexity.
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 enables quick, reliable, and precise arc extinction by maintaining the arc within a defined trajectory, ensuring controlled rotation and protection against corrosion, thereby reducing production and assembly costs.
Implementation Method 1
a permanent magnet (7) provided with iron return means (11, 12), which generates a magnetic field that deflects the arc base
Implementation Method 2
The metallic components are encased in an insulating material jacket (14), leaving only the arc trajectory (10) free
Data Source
Figure 1
Figure 2~3
AI summary
In a permanent magnet quenching device (6) for quenching arcs in the contact system of load interrupters, a permanent magnet (7) which is provided with magnetic yoke means (11, 12) is supported on a ring element (9) which is galvanically connected to a fixed contact (1) of the load interrupter via retaining clips (8) and forms an arc movement path (10) for the arc foot of an arc produced when disconnecting the contact system. Apart from the arc movement path (10), all free outer surfaces of the permanent magnet quenching device (6) are covered, without gaps, with an integral insulating material sheath (14) which fixes the individual components in their predefined position in a form-fitting manner and insulates the arc movement path from the other metal components of the quenching device.