长输管道中心线及应变位移检测系统

Central Line and Strain & Displacement Inspection System of Long Distance Pipelines

铺设于地震带、滑坡易发区、冻土区等地区的管道易受土体移动灾害的影响而产生管道位移、形变的问题。使用研制的长输管道中心线及应变位移检测系统对管道进行内检测,可以获得检测器的位置、姿态信息。结合地面预埋定标盒记录的检测器,通过时间和高精度坐标信息可以解算出管道全线的坐标信息;利用开发的管道弯曲应变及位移算法,精确计算管道由于附加应力所产生的弯曲应变及位移。通过牵引试验及现场重复检测验证了此系统及方法的可行性及检测精度,为管道中心线定位、事故预防及完整性评价提供科学依据,对保证地质灾害区长输油气管道的安全运行具有重要作用。

The pipelines which are located in the seismic zone,area prone to landslides,and permafrost area are susceptible to displacement and deformation caused by disaster of the soil/earth movement.Using the self developed long-distance pipeline centerline and strain displacement detection system to detect the inside pipeline,we can obtain the position and posture/gesture information of the detector.The coordinate information of the whole pipeline can be calculated by the time and high-precision coordinate information,combining the detectors recorded in the ground-embedded calibration box.Using the developed pipeline bending strain and displacement algorithm,the bending strain and displacement of the pipeline due to the additional stress can be accurately calculated.The feasibility of the system and method and the detection accuracy are verified through the traction test and on-site repeated testing.This provides a scientific basis for positioning of the pipeline centerline,accident prevention,and integrity evaluation,which plays an important role in ensuring the safe operation of long-distance oil or gas pipelines in the geological disaster areas.