| 摘要 |
<p>The invention relates to a plugging device (1) for sealing against an inner surface of a pipe. The device is comprising a mandrel (2), a sealing device (10) and an actuating device (3). The sealing device (10) is comprising a first body (12) provided circumferentially around the mandrel (2), an upper supporting device (20) provided axially above the first body (12) and a lower supporting device (22) provided axially below the first body (12). The actuating device (3) is connected to at least one of the supporting devices (20, 22) for actuating the sealing device (10) between a retracted state and a expanded state. The sealing device (10) further comprises a second, sealing body (14)made of an elastic or ductile material and provided circumferentially around the mandrel (2). The second, sealing body (14) is provided axially adjacent to the first body (12) in the retracted state. An inner surface (14I) of the second sealing body (14) is engaged with an outer surface (12 O) of the first body (12) in the expanded state. The second sealing body (14) is moved from the retracted state to the expanded state by an axial displacement of at least one of the supporting devices (20, 22) towards each other.</p> |
