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2. 发明授权

US3733093A Pull and push safety device for screw socket connections of pipes 失效
标题翻译：用于螺栓插座连接的拉杆和推动安全装置
公开(公告)号：US3733093A
公开(公告)日：1973-05-15
申请号：US3733093D
申请日：1971-05-20
申请人： SEILER G
发明人： SEILER G
IPC分类号： F16L19/07 , F16L19/08 , F16L21/06
CPC分类号： F16L19/08
摘要： The invention relates to a pull and push safety for screw socket connections of pipes, in particular malleable iron pipes, plastic pipes and large diameter pipes, such as for supply networks in cities or the like. In such pipes there is disposed in an annular chamber limited by the plane ends of the pipe and the socket equipped with an internal thread a sealing ring which is sealingly preloaded by a pressure ring screwable into the socket. In such screw socket connections there may occur at the installed pipes extraneously acting pulling forces or pushing forces caused by the internal pressure, tending to loosen the connection between the pipe sections. The sealing rings are able to absorb these forces, which can assume a considerable magnitude, to a limited extent only. Therefore, attempts have already been made to secure such connections against pushing and pulling forces. These known measures are costly, however, because they make necessary special machining operations at the pipe ends, which often can be performed only at the construction site. In addition, the machining of the pipe surfaces, such as cutting in a clamping groove, will weaken the pipe wall which may lead to the premature breakage of the pipe.
摘要翻译：本发明涉及用于管道，特别是可延展的铁管，塑料管和大直径管道的螺钉插座连接的拉和安全装置，例如在城市等中的供应网络。在这种管道中，设置在由管的平面端限定的环形室中，并且插座配有内螺纹，密封环由可旋拧到插座中的压力环密封地预加载。

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