国外在某些低压管路系统中常采用一种密封可靠、安装方便的管接(堵)头,其结构如图1所示。安装时,把管子按图从压紧螺母端插入,件2、件3、件4均紧套在管子外表面上。当旋紧压紧螺母5时,压圈3与管接(堵)体1端面的凹槽将“0”形密封圈2压紧,达到密封的目的。同时压紧螺母5 Some foreign countries in some low-pressure piping systems often adopt a sealed and reliable, easy to install pipe (plug) head, the structure shown in Figure 1. Installation, the pipe according to the picture from the end of the compression nut inserted, the pieces 2, 3, 4 are tight on the outer tube surface. When the compression nut 5 is tightened, the pressure ring 3 and the groove on the end surface of the pipe body 1 block the “0” -shaped sealing ring 2 for sealing. Simultaneously press the nut 5