Method and device for installation of an elongated offshore structure
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first embodiment
[0064]A first embodiment of a device 1 for installation or decommissioning of an offshore wind turbine device 2 will now be described in detail. First, it is referred to FIG. 7a. Here it is shown that the offshore wind turbine device comprises a tower device 3 with a nacelle 4 and at least one rotor blade 5 provided in a first end thereof and a foundation 6 provided in a second end thereof. The wind turbine device is considered known for a skilled person and will not be described here in detail. It should be noted that the present invention might be utilized for both floating wind turbine devices anchored to the seabed and wind turbine devices for fixation to the seabed. The foundation 6 may typically be a jacket foundation, a mono pile foundation, a tripod foundation, a gravity foundation, a suction anchor foundation, etc.
[0065]It should be noted that the present invention may be used for installation or decommissioning of only some parts of the offshore wind turbine device, for ex...
second embodiment
[0082]A second embodiment will now be described. In the second embodiment, the connection device 40 comprises a cross bar 43 slidingly arranged in relation to the outer frame 20 by means of the longitudinal actuation device 42. The cross bar 43 is showed in detail in FIGS. 4a and 4b. Each end 44 of the cross bar comprises different connection interfaces: a first connection interface 44a for supporting the cross bar 43 between the second and third outer frame elements 20b, 20c in the horizontal position, i.e. for bearing the cross bar against the upper edges of the second and third outer frame elements 20b, 20c in the horizontal position; a second connection interface 44b for connection to the longitudinal actuation device 42, for example lugs for connection to the piston of the longitudinal actuation device 42; and a third connection interface 44c, for example lugs, for connection to the connection elements 47. In the present embodiment the longitudinal actuation device 42 comprises...
third embodiment
[0104]A third embodiment is shown in FIG. 8a-8e. The same reference numbers are used as in the embodiments described above, and will therefore not be described in detail herein.
[0105]In FIG. 8a it is shown that the device according to the invention is used to install a foundation 6 of a wind turbine device 2, i.e. the tower device 3 with a nacelle 4 and rotor blade(s) 5 are installed on the foundation 6 in a subsequent operation by means of a similar or a different installation vessel. It should also be noted that in this embodiment, there might be no supporting frame 9 on the seabed, since the foundation 6 comprises suction anchor foundations 6a.
[0106]The vessel 10 is in this embodiment comprising propulsion means 15. In the present embodiment, these propulsion means 15 may be elevated to the position of FIG. 8a during transportation, and may be lowered to the position of FIG. 8b for positioning and orienting the vessel at the installation site.
[0107]In this embodiment, the device...
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