【摘要】 针对现有技术在海底管道微泄漏检测上的局限性,设计了一种双层耐压的球形检测器结构,利用计算流体仿真方法确定了球体在管道经济流速下能够通过极端竖直管道的关键参数,包括管径比λ与流速v;设计了基于ARM-Linux的多传感器数据采集与存储硬件系统;在长度为200 m陆地实验管道上对研制的内检测器进行了试验,结果表明,该检测器在大于经济流速的范围内可顺利通过竖直管段,且可检测到0.7 L/min的模拟泄漏量。更多还原

【Abstract】 Due to the limitation of the existing technology for small leakage detection on submarine oil pipelines,a spherical leak detector with double-deck and pressure proof is designed. Based on the CFD methods,the key parameters that could pass through the vertical segment of a pipe at the economical velocity range are confirmed,including diameter ratio λ and flow velocity v. A multi sensor data acquisition and storage system are designed based on the ARM-Linux. A simulation test of the sample detector is carried out on a 200 m land pipeline loop. The results show that the detector could pass through the vertical segment of the 8-inch( DN200) pipe,and it could detect the small leak rates of0. 7 L / min.更多还原