由一例真空自耗电弧炉保护跳闸事件谈辅助电极锁紧结构的演进与发展

从实际工作现场一例真空自耗电弧炉辅助电极锁紧结构气压过低造成保护跳闸事件, 思考气压保护的设计缘由, 从而系统地对电弧炉辅助电极锁紧结构的发展过程进行了详尽的说明, 并对在现有锁紧结构下的使用提出建议, 有助于对该电弧炉核心结构加深认识, 也有助于设计、使用人员更深刻的理解该部位结构演进的过程, 为今后的使用、设计或改造工作提供借鉴。

Fourth Generation Locking Mechanism of Auxiliary Electrode for Vacuum Arc Furnace with Self-Consuming Electrode: A Case Study of Tripping Incident

Herein, we addressed the 4^th generation of locking mechanism (a combination of pneumatic and electric locking) of auxiliary electrode via case-study of a tripping incident of our imported 8 t, vacuum arc furnace equipped with self-consuming electrode.The tentative discussions with specific examples centered on: i) the evolution, strengths and weaknesses of the 1^st to 4^th generation locking mechanisms; ii) the operation principle, advantages and structure of the 4 G pressure protection locking mechanism; and iii) the tips on the field operation, maintenance, diagnose and trouble-shooting of the vacuum arc furnace equipped with the 4 G locking mechanism.We suggest that the thought provoking discussions be of some technological interest in application, maintenance, design and upgrading of the 4 G locking mechanism for vacuum arc furnace equipped with self-consuming electrode.