Positive connection between a pipe and a ring inserted into the pipe

摘要

A positive connection between a pipe (1) and a ring (2) inserted into the pipe (1), in particular between the housing of a ram boring device and a stop ring inserted into the housing, comprises a convex groove (11) consisting of a section of a surface of a sphere on an inside wall of the pipe and a ring (2) with a corresponding convex outer surface of the same radius where the means of insertion of the ring (2) into the pipe (1) include the inside wall of the pipe (1) possessing at least one axial groove, or the outer surface of the ring (2) possessing at least one flattened portion, or the ring (2) being axially divided into two or more preferably unequal segments.