Z-Shaped Arc-Extinguishing Path for Lightning Protection Gaps
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Solution Overview
Problem
Existing lightning protection devices for transmission lines face challenges in effectively extinguishing strong arcs, as they primarily rely on radial blowing methods which are inadequate for robust arc extinguishment.
Innovation Solution
The arc compression-based lightning-protection gap device incorporates a Z-shaped arc-extinguishing path combined with a three-way tube, utilizing both axial-blast and cross-blast methods to stretch and thin the arc, creating multiple break points for effective extinguishment and preventing re-ignition, along with a counter mechanism for maintenance and a hydrophobic material for reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If radial blowing arc-extinguishing method is used, then the structure is simple, but the arc extinguishing performance is insufficient for strong arcs
Solution Approach 1:
The arc-extinguishing path is divided into multiple Z-shaped channels, segmenting the arc into multiple sections. Each channel contains arc-extinguishing tubes with arc-guiding balls that create multiple break points, effectively segmenting the arc to enhance extinguishing capability while maintaining structural compactness
Solution Approach 2:
The patent transitions from simple radial blowing to a three-dimensional Z-shaped arc-extinguishing path with both axial and cross-blast components. This dimensional complexity allows the arc to be stretched and thinned more effectively, creating multiple inflection and break points for superior extinguishing performance
2Reliability
If Z-shaped arc-extinguishing path with three-way tube is used, then arc extinguishing performance is improved, but device complexity increases
Solution Approach 1:
The three-way tube serves multiple functions: it connects adjacent arc-extinguishing channels, provides mounting positions for arc-guiding electrodes, and facilitates the Z-shaped path configuration. This multi-functionality reduces the need for separate components, balancing enhanced performance with controlled complexity
Solution Approach 2:
Multiple arc-extinguishing channels are merged into a compact Z-shaped arrangement within a single main body structure. The arc-guiding electrodes and three-way tubes are integrated to form a unified system that achieves complex arc manipulation without proportionally increasing overall device complexity
3Reliability
If multiple arc break points are created, then arc extinguishing effectiveness is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The arc-guiding balls automatically guide the arc through the Z-shaped channels and create break points through their positioning in the arc-extinguishing tubes. The system uses the arc's own energy and the geometric arrangement to self-establish the required break points, reducing the need for high-precision manual manufacturing of each break point location
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
This solution enhances arc extinguishing performance, stability, and maintainability, ensuring reliable operation under severe conditions by creating multiple arc break points and preventing re-ignition, while providing a countable and safe maintenance feature.
Implementation Method 1
Arc is free gas with high temperature and high conductivity. Extinguishing the arc is referred to as arc-extinguishing. The arc compression-based arc-extinguishing lightning-protection gap device incorporates a Z-shaped arc-extinguishing path combined with a three-way tube, utilizing both axial-blast and cross-blast methods to stretch and thin the arc, creating multiple break points for effective extinguishment
Implementation Method 2
along with a counter mechanism for maintenance and a hydrophobic material for reliability
Data Source
AI summary
Provided in the present disclosure is an arc compression-based arc-extinguishing lightning-protection gap device. The device comprises a lightning protector main body and an arc-striking electrode. The arc-striking electrode is fixedly mounted at one end of the main body. The other end of the main body is fixedly mounted, by means of a link fitting, to a crossarm or one end of an insulator string. The lightning protector main body is provided with an arc-extinguishing path consisting of several arc-extinguishing channels in a repeated Z-shaped arrangement. An arc-extinguishing tube at an inlet of a first arc-extinguishing channel of the arc-extinguishing path is connected to the arc-striking electrode via an arc-guiding rod, and an arc-extinguishing tube at an outlet of a last arc-extinguishing channel is connected to the link fitting. A three-way tube is provided at a joint of two adjacent arc-extinguishing channels; two ends of the three-way tube are each provided with one arc-guiding electrode; and the arc-guiding electrode has one end extending into the three-way tube and the other end connected to a nearby arc-extinguishing tube via direct contact or a wire. The present disclosure has the advantages of simple structure, reasonable design, improved arc-extinguishing performance, and stable operation.