Analysis of Running Speed of Discharge Speed Regulating Pig
When the gas flow rate of natural gas pipeline is too fast,the conventional pig and detector may have some prob-lems such as poor cleaning effect,poor signal of collecting defects,etc,in this paper,a method of speed regulation with dis-charge device was proposed.Taking Φ610 discharge speed regulating pig as an example,the structure and working principle of the discharge device were introduced.The stress and running speed of the pig during discharge were analyzed.The influence of the change of the area of the discharge hole and the change of the pig's running speed on the pressure difference between the front and rear end of the pig was analyzed by using the finite element method,the running speed of the pig after discharge can be determined by combining the local resistance coefficient value of the discharge hole determined by the thick-wall hole model and the pull test.By using the established equation,the running speed of the pig after discharge is close to the actual running speed in the industrial field,which proves the reliability of the calculation method.
NETL
NSTL
万方数据
维普
