自动化仪表(DCS)常见故障以及预防性维护
2021-01-12李莉
李莉
[摘 要]自动化仪表(DCS)是工业上广泛应用的一种工具,由于工业的生产环境复杂,自动化仪表经常面临在高温高压环境下作业的现象,因此,在使用过程中很有可能出现故障,严重威胁到工业生产安全。为了能够降低故障带来的危害,尽可能减少出现故障的几率,就需要深入分析故障出现的原因,做到具体问题具体应对。鉴于此,文章立足于自动化仪表(DCS)常見故障及成因,对具体的应对措施以及预防性维护方法展开如下探讨。
[关键词]自动化仪表;常见故障;预防性维护
[中图分类号]TH86 [文献标志码]A [文章编号]2095–6487(2021)11–0–03
Common Failures and Preventive Maintenance of DCS
Li Li
[Abstract]Automation instrumentation (DCS) is a tool widely used in industry. Due to the complex production environment of industry, automation instrumentation often faces the phenomenon of working in high temperature and high pressure environment. Therefore, it is very likely to malfunction during use. Threaten industrial production safety. In order to reduce the damage caused by the failure and minimize the probability of failure, it is necessary to analyze the cause of the failure in depth and deal with specific problems. In view of this, the article is based on the common failures and causes of automation instruments (DCS), and discusses specific countermeasures and preventive maintenance methods as follows.
[Keywords]automatic instrument; common failure; preventive maintenance
1 自动化仪表(DCS)常见故障及成因
1.1 温度控制仪故障及成因
由于自动化仪表(DCS)的作业环境多变,因此其内部出现故障的可能性也相对较大,这也是无法使DCS处于正常使用状态的关键原因。比如,一旦DCS处于湿度或者温度超出其内部元件所能承受的容差,就会引发温度控制仪故障,即DCS测量滞后。如果长时间无法改善外部环境条件,就会导致DCS测量元件严重受损,进而降低测量精确度。
1.2 电源故障及成因
电源是确保DCS系统正常运行的主要原因,一旦电源出现问题,就需要快速找出问题所在,常见的引发电源问题的原因主要有:①配线、电缆、端子接头接触不良。②电源在运行过程中致使接头松动。③由于受到外力作用导致螺栓连接位置接触不良。④电源线阻抗增加或者绝缘层质量不达标。⑤外物腐蚀了电源线,致使电源线接触不良。⑥电源线布线缺乏合理性。……
