现场清管作业时清管器经常被卡堵，严重时会影响正常生产。
The pig is blocked frequently when pipeline pigging, which will influence the normal operation due to severe plugging sometimes.
研究清管器在含蜡原油输送管道中的受力情况和运行规律，分析发生清管器卡堵事故的原因并提出相应措施。
On the basis of study about the forces on the PIG and the principle of PIG running in wax crude oil pipeline, to analyze the reason of PIG block accidents and to give measures.
该清管器的钢轴能在较大推力作用下发生弯曲变形，有利于通过弯头或变形管段，可有效避免堵卡事故的发生。
The steel axle of this kind of pig can bend under greater thrust force, it is helpful to pass through elbow or the section of converting pipe, so it can avoid efficiently block accident.
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