摘要
同心度与同轴度是大型输水管道设备的重要性能指标,其偏移量过大会导致管道发生非正常变形,影响管道运行可靠性、安全性。采用适用于大尺径管道设备的激光跟踪仪,对某输水工程中19处大型输水管道设备进行同心度、同轴度检测;为某一典型管道设备检测结果构建拟合模型,研究发现:1)根据同心度分析,5处管口中心偏差值超过GB 50766-2012标准中管口中心允许偏差值;2)根据同轴度分析,9处呈上拱形态势,3处呈下拱形态势,4处呈连续起伏态势。激光跟踪仪检测结果与人工检测结果拥有一致性。分析得知偏移量过大可能由区域地质条件复杂,管道及检修井易发生不均匀沉降所致。建议后续对仪器进行补偿分析实验,消弭结构遮挡、检测距离过大带来的误差,为大型管道的安全运行与维护提供更加强有力的检测技术支撑。
Concentricity and coaxiality are essential performance indexes of large water pipeline equipment.The excessive deviation of concentricity and coaxiality will lead to abnormal deformation of the pipeline and affect the reliability and safety of the pipeline operation.The large diameter pipeline equipment suited laser tracker is used to detect the concentricity and coaxiality of 19 large water pipeline equipment in a water transmission project.A fitting model is built for the test results of a typical pipeline equipment.The results show that:1) according to the concentricity analysis,the center deviation value of 5 nozzles exceeds the allowable deviation value in the GB 50766-2012 standard;2) according to the coaxiality analysis,9 are in the form of upper arch,3 are in the form of lower arch,and 4 are in the form of continuous fluctuation.The results of laser tracker have agreement with the results of manual detection It is found that the excessive deviation is perhaps caused by the complex regional geological conditions and the uneven settlement of pipelines and maintenance wells.In order to eliminate the error caused by the structure occlusion and the excessive detection distance,it is suggested that the compensation analysis experiment be further carried out for the equipment to provide a more powerful detection technological support for the safe operation and maintenance of large-scale pipelines.
作者
张露凝
樊博
李建利
冯涛
王建慧
刘卫东
ZHANG Lu-ning;FAN Bo;LI Jian-li;FENG Tao;WANG Jian-hui;LIU Wei-dong(Beijing Water Science and Technology Institute,Beijing 100048,China;Dong Ganqu Management Department of Beijing South-to-North Water Diversion,Beijing 100176,China;Beijing Water Conservancy School,Beijing 100024,China)
出处
《工业技术创新》
2020年第3期108-112,共5页
Industrial Technology Innovation
关键词
大型输水管道设备
激光跟踪仪
同心度
同轴度
拟合模型
Large Water Pipeline Equipment
Laser Tracker
Concentricity
Coaxiality
Fitting Model
