| 摘要 |
Arrangement at a plug for sealing liquid- or gas-carrying pipes, comprising several slips ( 15 ) arranged peripherally on the plug, so as to allow them to be pushed up along a conical force ring ( 25 ) by means of a hydraulic cylinder ( 5 ), where the slips ( 15 ) are provided with a possibly divided sliding surface ( 19, 19 ') and at least one possibly divided sliding surface ( 20, 23 ) having an angle that differs from the angle of the sliding surface ( 19, 19 '). The force ring ( 25 ) has sliding surfaces ( 27, 29, 29', 31 ) that correspond to the sliding surfaces ( 19, 19', 20, 23 ) of the slips. The first part of the sliding surfaces ( 20, 23, 27, 31 ) has a steep gradient and the second part of the sliding surfaces ( 21, 21', 29, 29 ') has a small gradient.
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