公开(公告)号：EP0932785A1

公开(公告)日：1999-08-04

申请号：EP97948708.0

申请日：1997-10-24

申请人： MANNESMANN Aktiengesellschaft

发明人： FOERING, Herbert ,  GIGOWSKI, Thomas ,  BERANE, Michael ,  HARTINGS, Karl-Heinz ,  SCHURR, Johannes

IPC分类号： F16L13

CPC分类号： F16L13/141

摘要： The invention relates to a pipe coupling with a cylindrical pipe, the smooth end portion of which can be introduced into a fitting having at least a sleeve-like area extending longitudinally and wherein a seal ring is mounted between the outer wall of the pipe and the inner wall of the fitting. The fitting and the pipe are firmly interconnected by means of a plastic deformable pressing tool acting externally at least on one radial plane of the sleeve-like area of the fitting and of the underlying pipe section. According to the invention, a metal bushing (31) that can be slid on to the fitting (1) by exerting force is mounted between the outer wall of the pipe and the inner wall of the fitting. The predetermined axial extension of the metal bushing (31) surrounds the pipe (2) from both front ends, the length of the metal bushing (31) being selected in such a way that it corresponds to the necessary overlap between the pipe (2.1, 2.2) and the fitting (1). This occurs when, after sliding the end portion of the pipe into the metal bushing (31) or inserting the fitting together with the metal bushing (31) previously slid into the end portion of the pipe, the front end (9, 10) of the end portion of the pipe facing the fitting (1) fits exactly on the marking made on the metal bushing (31) or on the stop, and the seal ring (32, 33) is diametrically traversed by the metal bushing (31).

公开(公告)号：EP0932786A1

公开(公告)日：1999-08-04

申请号：EP97948707.0

申请日：1997-10-24

申请人： MANNESMANN Aktiengesellschaft

发明人： FOERING, Herbert ,  GIGOWSKI, Thomas ,  BERANE, Michael ,  HARTINGS, Karl-Heinz ,  SCHURR, Johannes

IPC分类号： F16L21

CPC分类号： F16L21/02

摘要： The invention relates to a pipe coupling with a cylindrical pipe, the smooth end portion of which can be introduced in a fitting having at least a sleeve-like area extending longitudinally and wherein a seal ring is mounted between the outer wall of the pipe and the inner wall of the fitting. The fitting and the pipe are firmly interconnected by means of a plastic deformable pressing tool acting externally at least on one radial plane of the sleeve-like area of the fitting and of the underlying pipe section. According to the invention, a metal bushing (30) that can be slid on the pipe end by exerting force is mounted between the outer wall of the pipe and the inner wall of the fitting. The predetermined axial extension of the metal bushing (30) surrounds the pipe (2) from its front end, the length of the metal bushing (30) being selected in such a way that it corresponds to the necessary overlap between the pipe (2) and the fitting (1). This occurs when after sliding the fitting (1) in the metal bushing (30) or after inserting the pipe (2) into the previously slid metal bushing (30) in the fitting (1), the front end (34) of the fitting (1) facing the pipe (2) fits exactly on the end of the metal bushing (30) and the seal ring (31, 32) is diametrically traversed by the metal bushing (30).