首页|中缅原油管道泵出口压力表管线螺纹接头力学特性研究

中缅原油管道泵出口压力表管线螺纹接头力学特性研究

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中缅原油管道泵出口压力表管线存在持续微振、压力高、温差变化大等情况,导致螺纹接头处常出现渗漏油现象,严重威胁管道系统安全.采用有限元软件对 1/2NPT规格的现场管螺纹力学特性进行数值计算,发现螺纹面上的振动频率从30 Hz增大到150 Hz过程中,最大Mises应力及最大剪切应力均明显减小,分别减小了14.11%和12.84%;管道内压从4 MPa增大到12 MPa过程中,螺纹面上的最大Mises应力及最大剪切应力明显增大,分别增加了247.2%和242.5%;环境温度对螺纹受力影响很小,当温度从10℃增大到80℃时,最大Mises应力仅增大了0.00019 MPa.振动是导致管螺纹接头失效的最主要原因,且振动频率135 Hz是现场螺纹受力急剧变化的临界点,应采取必要的减振措施来保证连接安全.
Research on Mechanical Characteristics of Threaded Connection of Pressure Gauge at Outlet of China-Myanmar Crude Oil Pipeline Pump
The pressure gauge pipeline at the pump outlet of China-Myanmar crude oil pipeline has sustained micro-vibration,high pressure and large temperature difference,which leads to frequent leakage of oil at the threaded joint,which seriously threatens the safety of the pipeline system.The mechanical characteristics of pipe threads with 1/2NPT specification were numerically calculated by finite element software,it was found that when the vibration frequency of the thread surface increased from 30 Hz to 150 Hz,the maximum Mises stress and the maximum shear stress decreased significantly,by 14.11％and 12.84％,respectively.The maximum Mises stress and maximum shear stress on the thread surface increased obviously when the internal pressure of the pipeline increased from 4 MPa to 12 MPa,which increased by 247.2％and 242.5％,respectively.The ambient temperature had little effect on the stress of thread.When the temperature increased from 10℃ to 80℃,the maximum Mises stress increased only 0.00019 MPa.Vibration was the main cause of pipe thread joint failure,and the vibration frequency of 135 Hz was the critical point of the rapid change of the force of the thread in the field,necessary vibration reduction measures should be taken to ensure the safety of the connection.

China-Myanmar crude oil pipelinePump outlet linePipe thread jointVibration frequencyLeakageVon Mises stressShear stress

袁运栋、余春浩、徐鼎淇、周翔、戴兴正、张越超、折明、范开峰

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中油国际管道有限公司,北京 100029

中国石化中原油田分公司,河南 濮阳 457001

常州大学,江苏 常州 213164

中缅原油管道 振动频率 泄漏 Von-Mises应力 剪切应力

中国石油集团东南亚管道有限公司项目国家自然科学基金青年基金项目辽宁省教育厅科学研究经费项目辽宁省自然科学基金计划重点项目博士启动基金项目

DNY-2022-HT-JS-2951904147L202003520180540044

2024

当代化工
中国石油抚顺石化公司,中国石化抚顺石油化工研究院,沈阳市医药和化工行业联合会

当代化工

CSTPCD
影响因子：0.412
ISSN：1671-0460
年,卷(期)：2024.53(7)
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