Experimental study on dynamics of rotatable bypass-valve in speed control pig in gas pipeline

作     者：Zhu, Xiaoxiao Zhang, Shimin Tan, Guibin Wang, Deguo Wang, Wenming 

作者机构：China Univ Petr Coll Mech & Transportat Engn Beijing 102249 Peoples R China 

出 版 物：《MEASUREMENT》 (Meas J Int Meas Confed)

年 卷 期：2014年第47卷第1期

页      面：686-692页

核心收录：

学科分类：08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 081102[工学-检测技术与自动化装置] 0811[工学-控制科学与工程] 

基　　金：company of PetroChina Natural Gas & Pipeline Company [HX2008212] National Natural Science Foundation of China 

主　　题：Gas pipeline Speed control pig Bypass-valve Torque characteristics Control algorithm 

摘      要：Periodically pigging of oil and gas pipelines for dewatering, cleaning and inspecting becomes a standard industry procedure. Speed control unit is needed to control the speed of the pig and keep it work at a moderate constant speed, especially in the large diameter and high pressure gas pipelines. Rotatable bypass-valve is a necessary part in speed regulating unit, which is used to control the speed of pig by changing the amounts of the bypass flow across the pig body. However, the dynamics of the bypass-valve is complexity and indeterminacy during bypassing. As a result, in this paper, an experiment facility is set up to simulate the real working condition and get the dynamic characteristics of bypass-valve. The relationship among the torque, the opening of bypass-valve and the differential pressure over bypass-valve can be obtained in this experiment, which can provide the references to make control algorithm for speed control pig. (C) 2013 Elsevier Ltd. All rights reserved.