管道内封堵器卡瓦齿形角对锚定性能的影响  

Influence of the profile angle of slip in pipeline plugging device on the anchoring performance

作　　者：李振北 胡铁华[2] 傅丹蓉[1] 荆睿 何肖宁 LI Zhenbei;HU Tiehua;FU Danrong;JING Rui;HE Xiaoning(China Petroleum Pipeline Inspection technologies Co.Ltd.;China Academy of Machinery Science and Technology)

机构地区：[1]中油管道检测技术有限责任公司 [2]机械科学研究总院

出　　处：《油气储运》2018年第11期1308-1314,共7页Oil & Gas Storage and Transportation

基　　金：国家重点研发计划项目"油气管道及储运设施缺陷损伤检测技术及装备研制";2016YFC0802102

摘　　要：为了研究管道内封堵器卡瓦齿形角对锚定性能的影响规律,结合材料力学和弹塑性力学理论,建立了封堵器卡瓦锚定过程的有限元模拟仿真模型。利用有限元分析方法开展了相同齿形角度值、不同齿形角前角和后角组合形式对锚定性能的影响规律研究。研究结果表明:在齿形角数值一定的前提下,在一定范围内同时增大齿形角前角和减小齿后角可降低卡瓦牙形齿和管壁上的等效应力,另外也可减小管壁上的接触应力幅值差,缓解接触点区域的近似应力集中现象。研究结果对卡瓦齿形角的合理选型提供了理论依据,对提高卡瓦的使用寿命、降低封堵过程中对管道内壁及内涂层的损害具有指导意义。In order to study the influencing laws of the profile angle of the shp m the pipeline ptuggmg device on me anchoring performance, a finite element simulation model for the anchoring process of the slip in the plugging device was established based on the theories of material mechanics and elasto-plastic mechanics. The influencing laws of the same profile angles and the rake-relief angle combination on the anchoring performance were investigated by the finite element method. It is shown that when the increase of the rake angle and the decrease of the relief angle are conducted simultaneously in a certain range while the value of profile angle is certain, both the equivalent stress on the slip teeth and the pipe wall and the contact stress amplitude value difference on the pipe wall can be decreased. Thus, the approximate stress concentration in the contact area is alleviated. The research results provide the theoretical basis for the rational selection of slip profile angle. It is of great significance to improve the service life of slips and reduce the damage to the inner wall and the inner coating of the pipeline in the process of plugging. （11 Figures, 2 Tables, 20 References）

关 键 词：管内封堵器 卡瓦 齿形角 锚定性能 

分 类 号：TE832[石油与天然气工程—油气储运工程]