| 摘要 |
For a pressure-sealed coupling between pipes, a coupling sleeve (2) is used with a constant wall thickness and at least two internal teeth (6,7), which are spaced apart and are radially around it and set back against the inner dia. of the sleeve. The outer surface of the sleeve (2) carries fixing groove marks (8,9) opposite the teeth (6,7) and matching their width. A concentric pressure ring (11) is pushed over the sleeve (2) to cover its whole length, with inner projections (15,16) to be aligned with the sleeve fixing marks (8,9). The outer ends of the pressure ring expand outwards (17,18) from the center to form a conical gap with matching conical surface expansions (19,20). Press rings (12,13) are around the outer ends of the pressure ring (11) so that, as the sleeve (2) is moved into place over the fixing marks (15,16), there is a radial displacement of the teeth (6,7) by the projections (15,16) into the surface of the pipe (4) coupled by the sleeve (2). |
