《工业安全与防尘》1989年第4期刊出“吊卡安全销亟待改进”一文后,引起辽河油田领导和有关部门重视。经调查,老式销子不符合安全要求,极易窜出,多次发生单环或双环脱开事故,1982年以来,共发生双环脱开致人死亡事故5起。为确保吊卡安全销达到本质安全化,杜绝类似事故发生,油田安全监察处与矿机研究所对吊卡安全销进行技术革新。经多种方案试验,目前以磁性 “Industrial Safety and Dustproof” 1989 the fourth issue of “Elevators need to be improved security pin” article, led by Liaohe Oilfield leaders and relevant departments attention. After investigation, the old-fashioned pins do not meet the safety requirements, easy to flee, a number of single-loop or double-loop disengagement accident, since 1982, a total of double ring disengagement caused fatal accidents 5. In order to ensure the safety of elevator safety card to achieve intrinsically safe, to prevent similar accidents, Oilfield Safety Supervision and Mining Institute of elevator safety pin for technological innovation. After a variety of program testing, the current magnetic