| 摘要 |
1. A system for lifting and moving heavy loads, especially for use in the installation or removal of entire or parts of offshore installations, comprising a number of lifting devices (1) which are arranged for mounting on a floating structure (2) which during use is located beside the load (32) which has to be lifted, characterized in that each lifting device (1) comprises a lever arm unit (5) with a first (6) and a second (7) arm projecting in opposite directions from a common mounting point(8), the first arm (6) having a lifting point(11) at its free end for engaging with the load(32);at least one first container(12) which is connected to the first arm(6) at a point near the said lifting point and which is arranged to receive and discharge a flowable medium and to be submerged in a volume of water (4);at least one second container (19) which is suspended at the free end of the second arm (7), the interiors of the containers (12, 19) being interconnected via a transferring device(21). 2. A system according to claim1, characterized in that a device (22) is provided for transferring medium between the first container (12) via the transfer device (21) to the second container (19). 3. A system according to claim1 characterized in that transfer of medium is undertaken by a compressor unit (22) for pressurizing the interior of the first container (12) with compressed air. 4. A system according to claim 1 or 3, characterized in that a guide device (16, 17 18) for vertical movement of the container (12) is arranged between the container and an adjacent outer side of the floating structure concerned (2). 5. A system according to one of the claims 1-4, characterized in that between the lever arm unit's (5) second arm (7) and the floating structure (2) there is arranged a hydraulic cylinder/piston unit (24), which is arranged to exert a force on the second arm (7). 6. A system according to claim 5, characterized in that the hydraulic cylinder/piston unit (24) is arranged to determine the lever arms (6, 7) turning angle, and thereby the lifting point's (11) lifting height. 7. A system according to one or more of the preceding claims, characterized in that it comprises a number of floating structures (2) which during use are each located on one of two opposite sides of the load (32) which has to be lifted. 8. A system according to claim 7, characterized in that it comprises four lifting devices (1) which are mounted two by two beside one another on the respective barge (2), the device's lifting points (11) being adapted for engagement with a respective corner portion of the load (32) which has to be lifted.
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