Walterscheid Rohrverbindungstechnik Gmbh

Alfons Schorn-Gilson

Michael Hahn

J&ouml;rg Altenrath

A pipe connection has a connecting member ( ). The connecting member ( ) has a first end face ( ), a first conical bore ( ), starting to taper from the latter, which defines a first cone angle ( ). The connecting member also includes an axial bore length ( ) followed by a bore ( ). The outside of the connecting member ( ) has a threaded portion ( ). A nut ( ) has a second conical bore ( ) tapered in the direction opposite to the direction of the first conical bore ( ). The second conical bore defines a second cone angle ( ). A through-bore ( ) is in the nut ( ). A pipe ( ) has a pipe projection ( ) which extends into the bore ( ) of the connecting member ( ). A connecting portion ( ) is on the pipe ( ). A first conical tensioning face ( ) which cooperates with the first conical bore ( ) is on the connecting portion ( ). The first conical tensioning face defines a third cone angle ( ) which is greater than the first cone angle ( ) and whose axial length of overlap ( ) with the first conical bore ( ) is smaller than 15% of the axial bore length ( ) of the first conical bore ( ). The connecting portion ( ) has a second conical tensioning face ( ) which cooperates with the second conical bore ( ). The second conical tensioning face defines a fourth cone angle ( ) corresponding to the second cone angle ( ). On the radial inside of the first tensioning face ( ), an annular recess ( ) is arranged. The recess ( ) starts from the smallest cone diameter ( ) of the first tensioning face ( ) and extends over part of the axial length.

Pipe connection with a connecting portion formed onto the pipe

A threaded connection for easily deformable thin-walled pipes (,) has a connecting member (,) with a cylindrical receiving bore (,) accommodating the pipe (,) and an outer thread (,). A nut (,) is provided with an inner thread (,) which is threaded onto the outer thread (,). The nut (,) has a through-bore (,) for the pipe (,) and a conical bore (,) which widens towards the connecting member (,). The pipe (,), at a distance from its end face (,), has a bulge (,) which is held in a clamped-in condition between the conical bore (,) and a conical supporting face (,) of a separate supporting ring (,). To limit the tightening movement, the supporting ring (,) has a stop face (,) against which the conical bore (,) comes to rest when the nut (,) is tightened. A holding face (,) on the supporting ring (,) is supported against the end face (,) of the connecting member (,). This design achieves advantageous supporting conditions, with the process of tightening the nut (,) remaining unaffected by the radial forces resulting from the axial tensioning force.

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Swisttal, Germany

Alfons Schorn-Gilson