摘要
目的:针对AK200S血液透析机,设计一款智能化的漏气检测系统,协助工程师快速排查漏气点位置范围。方法:根据常规检测经验及故障统计记录和数据,对血液透析机易发生漏气的部分水路进行分析简化,并仿照血液透析机自检时的压力测试方式,在目标水路外连接一个气泵,通过控制气泵及其连接的电磁阀,对其内部分时分段分别施加正负压力。施加压力后通过外接压力传感器获取一定时间前后管道内部压力数据进行对比,分析判断此段管道是否存在漏气,判断标准为前后压力差<5 mm Hg时,则视为无压力泄漏,反之则需排查此段管道易漏气点。结果:对出现漏气报警的AK200S/AK200US进行183次检测,其中171次漏气检测系统检测出漏气点范围。漏气点分布于:过滤器(Filter)至DRVA段73次,DRVA至DIVA段19次,DIVA至EVVA末端软管夹子79次,其中确定的漏气点分别为密封圈162次,阀膜1次、接头8次,漏气故障检测成功率>90%,其中常温状态下在预设排查水路的漏气检测成功率达到100%。结论:自制的漏气检测系统能够帮助临床工程师节约排查漏气点的时间,有效提高工作效率。
Objective:To design an intelligent system of leak detection for AK200S hemodialysis machine so as to fast troubleshoot the range of leaked point for helping engineer.Methods:The likely leaked part of flow paths of hemodialysis were simplified based on routine detection experiment and the statistical record and data of faults.And then,test mode of pressure when hemodailysis implemented self-inspection for leakage was imitated.There was a air pump was connected with aimed flow paths,and the positive and negative pressure generated by controlling an external air pump and the connected magnetic valve were applied at different time and different section,respectively.After increased pressure,depended on the comparison of intra pressures from pressure sensors for one part of pipeline between pre-and post of one spell to analyze and decide whether this section exist leak.And the judgment standard was if the difference of pressure was less than5mmHg,there was not leak in this flow path,otherwise,the likely leak point should be troubleshot in further detection.Results:183detections were implemented at AK200S/AK200US which once happened alarm of leakage.And in the183detections,the detection system for leakage has found the ranges of leaked point in171detection.The distribution of leaked points was:73times were from filter to DRVA section,19times were from DRVA section to DIVA section,79times were from DIVA section to champ of flexible pipe at terminal of EVVA.On the other hand,in the leaked points,162points were at seal ring,1point was at film of valve,8points were at connector,and the success rate of detection for leaked fault was more than90%.Besides,the success rate of detection for leakage on flow paths of prepare troubleshooting under normal temperature was100%.Conclusion:The detection system of self-dependant development for leakage can help engineer to save time of troubleshooting for leaked point and enhance the work efficiency.
作者
刘颂
罗华生
LIU Song;LUO Hua-sheng(Department of Equipment Management, The First People’s Hospital of Zhaoqing,Zhaoqing 526000, China)
出处
《中国医学装备》
2017年第8期14-17,共4页
China Medical Equipment
关键词
血液透析机
漏气检测
智能化
效率
Hemodialysis machine
Leak detection
Intelligent
Efficiency
