变电站隔离/接地开关传动轴涂层维护技术研究

Coating Maintenance Technology of Isolated Ground Switch Transmission Shaft in Substation

目的针对隔离/接地开关传动轴表面维护涂层展开测试研究,并对其后续维护提出相应措施,希望通过加强检修维护与运行巡视来提高运行质量,进而保障系统安全性和可靠性。方法采用紫外光老化、中性盐雾等环境试验对现场维护后隔离/接地开关传动轴原件以及与现场隔离/接地开关传动轴相同修复工艺制作的涂层样板进行环境耐久性测试,并对涂层性能进行评级,对后续维护提出相应建议措施。结果紫外1000h后,传动轴原件表面涂层无明显缺陷,光泽保持率平均值为96.8%、色差ΔE*ab的平均值为0.62,色牢度为4~5级。盐雾1000 h后,传动轴原件表面涂层出现起泡,未出现生锈、开裂、剥落现象,起泡等级为2(S2)、生锈等级为Ri0、开裂等级为0(S0)、剥落等级为0(S0)。结论必须对变电站隔离/接地开关传动轴表面维护涂层予以足够重视。加强工艺质量管理,及时可靠地掌握设备运行状况,故障尽快查明原因排除隐患,提高系统安全性和可靠性。

Objective To carry out testing research on maintenance coating on transmission shaft of isolation switch, put forward corresponding measures for follow-up maintenances to improve running quality by strengthening maintenance and patrol, and thus guarantee security and reliability of the system. Methods Aging of ultraviolet light, the medium salt fog, etc. were applied to carry out environment durability test on original isolation/grounding switch transmission shaft and coating samples made in the process and assess performance of the coating. Some suggestions were put forward for follow-up maintenance. Results After Uv test of 1000 h, there was no obvious defect on the original surface of the transmission shaft. The luster retention rate was 96.8%; the color difference ΔE＊ab averages was 0.62; and the fastness was level 4-5. After salt spray test of 1000 h, there were bubbles, but no rust, no cracking, or peeling on the original surface of the transmission shaft with blister grade 2 （S2）, rusting grade Ri0, cracking level 0 （S0） and flaking grade 0 （S0）. Conclusion It is required to pay sufficient attention to the substation isolation switch, so as to strengthen manage-ment of process quality; timely grasp running status of equipment, find out causes as soon as possible, eliminate hidden dangers, and improve the system security and reliability.