Study on Passing Performance of a Pig Crossing Pipeline Dent Considering the Fluid Pressure
The passing performance of pig when crossing dented pipeline sections has rarely been studied.Taking the ø168 pipeline pig as an example,3D quasi-static and fluid-solid coupling simulation models of the pig crossing the dented pipeline were built respectively and compared.Then,based on the changes in the contact fric-tion mechanics of the driving cup and the dynamic characteristic parameters of the pig,the passing performance of the pig crossing the pipeline dent was quantitatively analyzed.The results show that when the driving cup of the pig passes through the dented pipeline section,the unstable moving speed may reduce the inspection accuracy of the corresponding pipeline section.The speed change sensitivity of the pig crossing the dent increases with the increase of the wring.In order to improve the passing performance of the pig crossing the dented pipeline,the cup wring of the ø168 pig should be less than 4%,the holding rate of the seating cup should be between 55%and 65%,and the interface of the cup structure should not be less than 2%.The study conclusions provide theoretical guidance for the optimization design and engineering application of pigs.
万方数据
维普
