管螺纹密封机理探讨分析

Discussion and Analysis of Pipe Thread Sealing Mechanism

管螺纹是用于管与接头、管箍、阀件、泵、缸等连接的基本手段。根据管螺纹的起源将管螺纹划分为英制管螺纹与美制管螺纹两大类,介绍了两类管螺纹的主要国际标准及中国标准。总结了管螺纹在国内市场的使用现状。重点讨论管螺纹密封机理,及G/R 1螺纹副与Rp/R 1螺纹副中G螺纹与R p螺纹的互换性问题。研究结果可为管螺纹密封机理研究提供理论参考,为新设备设计时管螺纹选择、设备维护和修理中管螺纹的应用提供参考。

Pipe threads are basic means of connecting pipes with joints,pipe hoops,valves,pump and cylinder.According to the origin of pipe treads,they are divided into two kinds of pipe treads,which are Whitworth Pipe Threads and National Pipe Threads.The international standard and Chinese standards of the two kinds of pipe threads are introduced in this paper,and application of the pipe threads in domestic market is also summarized.The sealing mechanism of pipe threads and the interchangeability of G and Rp in the combination of G/R 1 and Rp/R 1 are mainly discussed.The study can provide guidance for the pipe threads selection of new design and application in equipment maintenance and repair.