| 摘要 |
An arrangement at a plug for sealing of liquid- or gas-carrying pipes, comprising a main section ( 1 ) having one or more axially arranged hydraulic cylinders ( 5 ), fastening devices ( 13, 17, 21 ) and sealing surfaces ( 3, 23 ), where the piston rod ( 9 ) of the hydraulic cylinder ( 5 ) is through-going and comprises ball joints ( 27 ) at the ends ( 11, 15 ) of the piston rod, as well as predominantly axial bores for the passage of cables, liquid and gas. A method of fastening and releasing a plug for sealing of liquid- or gas-carrying pipes, comprising at least two interconnected main sections ( 1 ) having one or more axially positioned hydraulic cylinders ( 5 ), fastening devices ( 13, 17, 21 ) and sealing surfaces ( 3, 23 ), where the main sections ( 1 ) have a fixed mutual spacing that is not affected by the movement of the cylinders ( 5 ), and which may be fastened or released in an arbitrary sequence. |
