管道内封堵气囊的结构设计与优化

Structure design and optimization of pipeline plugging airbag

橡胶气囊在管道内封堵器中具有十分重要的作用,为了改善其整体性能,从气囊的工作原理和工作环境出发,建立橡胶气囊的三维模型。基于ANSYS有限元仿真软件,将结构静力学分析、接触分析及试验设计相结合,对橡胶气囊的结构加以改进。通过试验对比分析改进前后气囊封堵压力的变化情况,发现改进后气囊封堵压力提高了50.1%,可达1.126 MPa。试验结果与ANSYS仿真结果基本一致,证明了有限元模型分析结果的准确性。该设计为管道内封堵器的优化设计提供了新思路,且有利于管道内封堵装置可靠性评价体系的构建。

A rubber airbag plays a very important role in the pipeline plugging devices. In order to improve its overall performance, a 3D model of rubber airbag was established based on its working principle and working environment. Based on the finite element analysis software ANSYS, the rubber airbag was improved correspondingly by combining various analysis methods together, e.g. structural static mechanics analysis, contact analysis and test design. The plugging pressure of the airbag before and after the improvement were compared. It is shown that after the airbag is improved, its plugging pressure is increased by 50.1% and can reach 1.126 MPa. Besides, the test results were compared with ANSYS simulation results. It is indicated that the numerical simulation results are consistent with the experimental results, demonstrating the accuracy of analysis results by the finite element model. The design not only provides a new idea for the optimization of pipeline plugging devices, but also facilitates the construction of the reliability evaluation system for pipeline plugging devices.