公开(公告)号：US5916468A

公开(公告)日：1999-06-29

申请号：US887942

申请日：1997-07-03

申请人： Saburo Akiyama ,  Yoshio Katayama ,  Nobuhiro Nishikata

发明人： Saburo Akiyama ,  Yoshio Katayama ,  Nobuhiro Nishikata

IPC分类号： B29C45/14 ,  B29D23/00 ,  F16L47/03 ,  H05B3/58 ,  H05B3/44

CPC分类号： B29D23/005 ,  B29C45/14549 ,  F16L47/03 ,  H05B3/58 ,  B29C65/342 ,  B29C65/3476 ,  B29C65/8215 ,  B29C66/3472 ,  B29C66/5221 ,  B29C66/5229 ,  B29C66/52292 ,  B29C66/52298 ,  B29C66/71 ,  B29C66/7392 ,  B29C66/949

摘要： An inner-less electrically weldable pipe joint has a hollow cylindrical pipe joint body of a thermoplastic material and a resistance heating wire coil surrounded by the pipe joint body. The wire is partly exposed to an hollow interior of the pipe joint body and partly embedded in an inner surface of the pipe joint body. During the welding operation, the material of the welding zone of the pipe joint and the pipes being connected is readily and selectively heated by the heat from the exposed wire, there by enhancing the welding strength and shortening the welding time. Also, described are methods of producing such an inner-less electrically weldable pipe joint.

摘要翻译： 内部可焊接的管接头具有热塑性材料的中空圆柱形管接头体和由管接头体包围的电阻加热丝线圈。 线部分地暴露于管接头本体的中空内部，并且部分地嵌入在管接头本体的内表面中。 在焊接操作期间，通过提高焊接强度和缩短焊接时间，管接头焊接区域和被连接的管道的材料通过暴露的焊丝的热量容易且选择性地加热。 此外，还描述了制造这种无内部电焊接管接头的方法。