• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A device is described for lifting and placing an elongate object of at least 200 tons on a ground. The device comprises a floating platform with a working deck on which a lifting device for lifting the object is mounted. The lifting device has two A-frame booms spaced apart in an athwartship direction of the platform and connected to the working deck about an athwartship axis of the platform. The lifting device further has a gripping construction connected to the working deck with gripping members which can grip a shell part of the object and which extend over a transverse edge of the platform. The grab construction can be moved across the working deck in the athwartship direction. A method using the device is also described.
    公开号:BE1028183B1
    申请号:E20205220
    申请日:2020-04-03
    公开日:2021-11-03
    发明作者:Dieter Wim Jan Rabaut；Sebastian Nekeman
    申请人:Deme Offshore Be Nv；
    IPC主号:
    专利说明:

    DEVICE FOR LIFTING AND PLACING AN Elongated OBJECT ON A SURFACE AND ACCORDING PROCEDURE
    TECHNICAL FIELD OF THE INVENTION The invention relates to a device and method for placing an elongate object of at least 200 tons on a base. The invention relates in particular to a device and method for placing a monopile of a wind turbine on an underwater bed.
    BACKGROUND OF THE INVENTION The invention will be explained with reference to an offshore wind turbine. However, the reference to such a wind turbine does not imply that the invention is limited thereto, and the device and method can equally well be used for placing any other large elongate object on any surface, such as other offshore foundation structures, jetties, radar and other towers. The foundation of an offshore wind turbine usually has an elongated design because the difference in height between a wind turbine placed on the foundation and the underwater bed has to be bridged. Furthermore, an extra length is needed to anchor the fanding in the underwater bed. A lot of material is also required to be able to absorb the considerable usage loads. A foundation therefore usually has a relatively high weight. In addition, foundations are becoming heavier and heavier as wind turbines are designed larger and larger. A frequently used foundation of a wind turbine comprises a monopile that can be provided at the top with a transition piece that forms the connection with a turbine tower mounted on the monopile. The monopile is submerged and driven with one underside into the underwater bed. Monopiles typically comprise hollow cylindrical structures made of steel or concrete that can be more than 50 m in length, 6 m in diameter and more, and weigh up to 800 tons and more.
    A known method for placing a monopile on an underwater bottom comprises picking up the monopile from a vessel with lifting means such as a lifting crane and lowering the monopile onto or into the underwater bottom, thereby placing the monopile in an approximately vertically oriented position. restrained by winch-operated auxiliary cables. Only when the monopile is fixed in the underwater bottom, for instance by driving it into the underwater bottom, is the monopile uncoupled from the lifting means. A drawback of the known method and device is that it can only be carried out in relatively calm seas. Indeed, such a large object receives a lot of energy from the sea (current, waves) and from the wind when it sinks into the water. The higher the swell, the more difficult it becomes to control a large object such as a monopile. Because it is only possible to work in relatively calm seas, a lot of time can be lost.
    SUMMARY OF THE INVENTION An object of the present invention is therefore to provide a device and method for placing an elongate object of at least 200 tons on a base, which at least partially obviates the above-mentioned drawbacks of the prior art. In particular, the invention aims to provide an improved device and method for placing a monopile of a wind turbine on an underwater bed.
    According to the invention, an apparatus is provided for this purpose according to claim 1. The apparatus is designed for lifting and placing on a ground an elongate object of at least 200 tons, and for this purpose comprises a floating platform with a working deck on which a lifting device for lifting the object is mounted, the lifting device comprising two A-frame-shaped booms spaced apart in an athwartship direction of the platform, which are pivotally connected about an athwartship axis of the platform to the working deck, and which are therefor in force-transmitting connection standing with two corresponding A-frame-shaped support structures mounted on the working deck, the lifting device further comprising a gripping structure connected to the working deck with gripping members adapted to grip a shell portion of the object, and extending over a transverse edge of the platform extending, with the grab structure in the athwartship direction ng is movable over the working deck at least between the booms.
    The combination of the claimed two booms with an A-frame shape and the movable gripper construction connected to the working deck with gripping members protruding over the athwartship edge of the platform ensures that relatively heavy elongated objects such as the current and future monopiles can be safely placed on a surface. such as an underwater bed can be placed and anchored in it.
    According to an embodiment of the invention, an arrangement in which the force-transmitting connection between each boom and the corresponding A-frame-shaped support structure comprises a tension cable running between the two has the advantage that relatively large loads can be lifted.
    It is furthermore advantageous if the device according to an embodiment is characterized in that at least one of the two booms is movable in the longitudinal direction over the working deck. This advantage is further elucidated below in the context of the method to be performed with the device for lifting and placing an elongate object of at least 200 tons on a ground. The device according to yet another embodiment is characterized in that the object can be picked up at a lifting point of one of the two booms, and the gripping construction is designed to grip the object hanging from the relevant boom at a distance from the lifting point. The gripping members extend beyond the athwartship edge of the platform allowing an object hanging from a boom of the lifting device to hang off the athwartship edge of the platform.
    The floating platform may have a quadrangular shape bounded by two athwartships and two longitudinal edges. An athwartship edge extends in an athwartship direction that is perpendicular to a sailing direction of the platform. A longitudinal edge extends in a longitudinal direction which is parallel to a sailing direction of the platform. The platform may be self-propelled or propelled by another vessel. The platform can also optionally be provided with a number of corner posts which can engage on the underwater bottom and which can lift the working deck above the water surface.
    Because the booms are A-shaped with each leg of a boom connected to the working deck pivotally about an athwart axis of the platform, an A-shaped boom is unable to rotate about an axis perpendicular to the working deck with respect to the working deck. from the work deck. As a result, the platform must be oriented in a suitable manner when lifting and placing an elongate object on a ground. The grab structure is movable in the athwartship direction over the working deck, at least between the booms. To this end, the connection of the gripping structure to the working deck may comprise a set of wheels which can be moved over a rail guide extending in the athwartship direction over the working deck, preferably along (and in the vicinity of) the athwartship edge. In addition to a rail guide, other types of guide are also possible. The displacement of the gripping construction can take place actively, for instance by driving the wheels, but can also take place passively, namely by moving along with a movement of the object received in the gripping construction. In one embodiment of the invention, the gripping members lie in a plane and the plane of the gripping members is rotatable about a longitudinal axis between a horizontal and a vertical position. This allows rotational movement about the same axis of an object received in the gripping members. The gripping members can be designed in any suitable manner. A particularly suitable embodiment comprises a gripping construction, the gripping members of which are movable between an open position, in which the casing part of the object can be received by the gripping members, and a closed position of the gripping members. In the closed position of the gripping members they can jointly form a circular enclosure of the engaged casing part. In this embodiment, the gripping members fit into the casing part, which in many cases will indeed also be circular, for instance in the case of a cylindrical monopile. The gripping members can be movable in known manner between the open and closed position, for instance by actuators in the form of hydraulic cylinders.
    Another embodiment of the invention is characterized in that the gripping construction further comprises a support which is adapted to support an underside of the object during lifting. This embodiment reduces the risk that an object suspended from a boom of the lifting device would slide out of its suspension. A suitable embodiment comprises a support comprising two arms attached to the gripping construction, for instance arms attached to the gripping members of the gripping construction. In use, the arms extend on opposite sides of the object and are provided on an underside with hooks which support the underside of the object. A simple embodiment comprises a support that is U-shaped, the base of the U-shape supporting the underside of the object. Another suitable embodiment relates to a device wherein the gripping structure further comprises motion damping means, which are adapted to dampen movements of the gripping members relative to the working deck. This embodiment of the device, and in particular its gripping construction, acts as a damping system which absorbs at least part of the energy of an object hanging from a boom of the lifting device without otherwise completely preventing swinging movements of the object. The motion-damping means ensure that a deflection of the object can indeed take place, but this is increasingly counteracted as the deflection increases. Thus, pendulum movements of the object are damped.
    A preferred embodiment of the invention relates to a device in which the motion-damping means are designed to dampen movements of the gripping members parallel to the athwartship direction.
    The motion-damping connection between the gripping members and the working deck can be arranged in many ways. It is thus possible for the movement-damping means to comprise a mechanical spring means which is arranged between the gripping members and the working deck. A suitable mechanical spring means comprises for instance a pretensioned wire, preferably steel wire, which is connected to a winch, optionally by means of a hydraulic cylinder. The motion-damping means can also comprise a hydraulic piston cylinder and throttling means for hydraulic fluid present in the piston cylinder. Yet another embodiment comprises motion damping means in the form of a hydraulic synchronizing cylinder arranged between the gripping members and the support structure. A synchronous cylinder (also referred to as a synchronization cylinder) is provided with a piston rod on both sides of the piston face. An external hydraulic line which connects the cylinder volumes runs between the cylinder volumes present on either side of the piston rod. The volume of the inflowing and outflowing hydraulic oil therefore always remains the same. A synchronous cylinder works in two directions without the need for an accumulator. The throttling means can be designed as openings in the piston of the piston cylinder and/or as constrictions in the hydraulic lines. Suitable throttle means include, for example, throttle valves that may or may not be adjustable.
    In order to be able to absorb the considerable forces when receiving an object and to transfer them efficiently to the working deck of the platform, the device according to an embodiment of the invention is characterized in that the gripping construction comprises a lattice frame connected to the working deck, to which the gripping members are attached. confirmed. It is furthermore advantageous if the gripping construction, and in particular the truss, is rotatably connected to the working deck. The gripping construction can thus be brought into a folded-away, non-operational position, which saves space. In the event that, for example, a wind turbine is placed at sea, a folding grab construction creates more space for installing auxiliary structures, such as a transition piece, for example, between the wind turbine and a placed monopile, and it also simplifies sailing away from the installation. For gripping an object, the gripping construction can be brought into an operational position, for instance by unfolding it. A further embodiment according to the invention relates to a device in which the gripping members lie in one plane and the gripping construction comprises a rotary motor connected to the working deck and adapted to rotate the plane of the gripping members about the longitudinal axis between the horizontal and the vertical position. If desired, the rotation can also be passive, in which embodiment the rotation motor is replaced by a cylindrical support part that allows such rotation.
    Another aspect of the invention relates to a method for lifting and placing on an underground an elongate object of at least 200 tons, the method comprising the steps of a) providing a device according to any one of the preceding claims; Db) positioning the grab structure on a first longitudinal side of the platform at the height of a first boom; c) engaging a first casing part of the object with the gripping members of the gripping construction in a substantially horizontal position; d) gripping with a sling or other gripping means another second jacket part of the object in substantially horizontal position, wherein the sling is connected to a second boom positioned opposite on the longitudinal side; e) raising the second skirt portion with the second boom so that the object rotates about the gripper structure from the horizontal position to a substantially vertical position; wherein the grab structure moves in the athwartship direction from the first to the second boom during step e). With the claimed method it becomes possible to lift and place relatively heavy objects at a higher sea level than is possible with the known method. In one embodiment of the invention, the object is picked up by the second boom at a lifting point, wherein the gripping members lie in a plane and the plane rotates in step ©) about a longitudinal axis between a horizontal and a vertical position.
    Another embodiment of the invention relates to a method wherein an underside of the object is supported with a support, at least during lifting. A further improved method is characterized in that movements of the gripping members relative to the working deck are damped, preferably movements of the gripping members parallel to the athwartship direction. In another embodiment of the invented method, the second boom has been moved relative to the first boom in the longitudinal direction over the working deck to a position which is further away from the athwartship edge - where the grab structure is located - than the position of the first boom. This facilitates the displacement of the grab structure during step e) in the athwartship direction from the first to the second boom and the forces are better distributed.
    The rotation of the object from the horizontal position to a substantially vertical position is further facilitated in an embodiment of the method in which the first and second skirt parts are spaced from each other and on either side of the center of gravity of the object.
    In another embodiment of the method, the second sheath part comprises a trunnion with which the sling can engage. As a result, the sling continues to engage in virtually the same position during rotation.
    According to an embodiment, a further optimized method further comprises the steps of: f) lowering the object into the substantially vertical position onto or into the underground; g) fixing the object relative to the substrate with a pile driver; and Dh) decoupling the object from the device. The pile driver is preferably suspended from the second boom. If the support was applied during the lifting and rotation of the object, the support at the bottom of the object is removed prior to step f).
    Although the device and method according to the invention can be used for placing any large elongate object on or in a subsoil, the object is preferably the monopile of a wind turbine, and the subsoil is an underwater bed.
    Fixing an elongate object placed on or in a substrate with the device and method according to the invention with respect to the substrate can be done in any manner. It is thus possible to drive a monopile into the subsoil by using a hydraulic hammer known per se, by drilling, or by another suitable technique. When the object is driven into the underground, the object is supported in a preferred method by the gripping construction. Finally, it is indicated that the embodiments of the invention described in this patent application can be combined in any possible combination of these embodiments. Each embodiment individually can be the subject of a divisional patent application.
    BRIEF DESCRIPTION OF THE FIGURES The invention will now be elucidated with reference to the following figures, without otherwise being limited thereto. In the figures: FIG. 1 is a schematic perspective view of a floating platform that can be used in a device according to an embodiment of the invention; fig. 2 is a schematic perspective view of a device according to an embodiment of the invention; fig. 3 shows a schematic perspective detail view of the gripping construction shown in figure 2 according to an embodiment of the invention; fig. 4A is a schematic perspective view of the gripping structure, in various positions, according to an embodiment of the invention; fig. 4B shows a schematic side view of the embodiment of the gripping construction according to the invention shown in figure 4A; fig. 4C shows a schematic top view of the embodiment of the gripping construction according to the invention shown in figure 4A;
    fig. 5 is a schematic perspective view of yet another embodiment of the gripping structure according to the invention; fig. 6 is a schematic perspective side view of yet another embodiment of the device according to the invention, in which a monopile is accommodated in a substantially horizontal position; fig. 7A-7D schematic representations of different steps of a method according to an embodiment of the invention; fig. 8 is a schematic perspective detail view of one of the steps shown in figures 7A-7D; fig. 9A-9E schematic representations of various subsequent steps of a method according to an embodiment of the invention.
    DESCRIPTION OF EMBODIMENTS With reference to Figure 1, an apparatus according to an embodiment of the invention is shown. More specifically, Figure 1 shows a floating platform 2 that can be used in such a device. The device 1 is designed for lifting and placing on a ground an elongate object of at least 200 tons, such as the monopile 4 shown in figures 6-9. Such a monopile 4 can for instance be used as a foundation for a (not shown) offshore wind turbine. The floating platform 2 has a working deck 20 on which a lifting device 3 for lifting the monopile 4 is arranged. The lifting device 3 comprises a first boom 3-1 which is arranged on a longitudinal side 2-1 of the platform 1. In the embodiment shown, this longitudinal side 2-1 is the starboard side of the platform 1. A second boom 3-2 is arranged on the working deck 2 of the platform 1 on an opposite longitudinal side 2-2. In the embodiment shown, the opposite longitudinal side 2-2 is the port side of platform 1. Both booms (3-1, 3-2) are spaced apart from each other in a transverse direction of platform 1. The booms (3-1, 3-2) are in the form of an A-frame, both legs of which on an underside thereof are hinged about a transverse axis 11 of the platform 1 and are connected to the working deck 1. Due to the A-shape of both booms (3-1, 3-2) are unable to rotate about a directional axis 12 extending perpendicular to the working deck 20 with respect to the working deck 20. When lifting and placing the platform 1 on a ground, a monopile 4 should therefore preferably be oriented and fixed in a suitable manner.
    The rotation of the booms (3-1, 3-2) about the transverse axis 12 can be effected by a force-transmitting connection with two corresponding A-frame-shaped support structures (3-3, 3-4) mounted on the working deck 20. In the embodiment shown, the force transmitting connection comprises tension cables 30 extending between each boom (3-1, 3-2) and the corresponding A-frame-shaped support structure (3-3, 3-4).
    Pulling the tension cables 30 causes a rotation of the booms (3-1, 3-2) in the direction of a stern 2-3 of the platform 1, where slackening the tension cables 30 causes a rotation of the booms (3 -1, 3-2) in the direction of a prow 2-4 of the platform 1. If desired, the booms (3-1, 3-2) are also equipped with auxiliary booms (30-1, 30-2) that are connected with tension cables 31 can be operated. The booms (3-1, 3-2, 30-1, 30-2) are also each provided with a lifting hook 32, which can be operated with corresponding cables.
    The booms (3-1, 3-2) are movable over the working deck 20 of the platform in a longitudinal direction 13. This can be accomplished by means of a rail guide 21 connected to the working deck 20. The platform 2 is self-propelled in the embodiment shown, but this is not necessary.
    With reference to figure 2, it is indicated that the lifting device 3 further comprises a gripping structure 5 connected to the working deck 2 . The grab structure 5 comprises a base 50 which is movable in the athwartship direction 10 over the working deck 20 between the booms (3-1, 3-2). To this end, the base 50 is connected to the working deck 20 by means of a sliding device 51. It is also possible to provide a rail connection 56 (see figure 3) between the base 50 and the working deck 20. In the embodiment shown in figures 2 and 3, the base 50 comprises two triangular side plates (50-1, 50-2) which are mutually connected. rigidly connected with cross beams 50-3. On a top side of the base 50, the gripping construction 5 is provided with a cylindrical part 52 in which gripping members (53-1, 53-2) are received via a common part 53-3. The gripping members (53-1, 53-2) can be moved between an open position shown in figures 2 and 3, in which a casing portion 40 of a monopile 4 can be received by the gripping members (53-1, 53-2), and a closed position of the gripping members (53-1, 53-2) shown in figures 4 and 5, in which this is no longer possible.
    The gripping members (53-1, 53-2) and the common part 53-3 lie in a plane 54, and the common part 53-3 is connected to the cylindrical part 52 such that the plane is rotatable about a longitudinal axis 55 between a horizontal position (see for example Fig. 8) and a vertical position shown in Fig. 2 .
    This rotation is shown schematically in figure 3 with the arrow 58. The rotation can be active, for instance by including a rotary motor (not shown) in the cylindrical part 52, or passive.
    The gripping construction 5 further comprises a support 57 which is adapted to support an underside 41 of a monopile 4 during lifting.
    The support 57 comprises two arms (57-1, 57-2) attached to the common part 53-3 of the gripping members (53-1, 53-2) and a bottom bracket 57-3 which together form a U-shape.
    The gripping structure 5 can also be referred to as 'upending tool' because it is adapted to erect a monopile 4 or other elongate object received therein, in cooperation with one or both of the booms (3-1, 3-2, 30- 1, 30-2). Due to the dimensions of a monopile 4, the gripping construction can have a large relative weight, for instance a total weight of 200-250 tons and more.
    Another embodiment of the gripping structure 5 is shown in figure 4. The base 50 in this embodiment comprises a robust steel frame (of about 300 tons for example), which is constructed from steel diagonal tubes, vertical tubes, and hot-formed steel tubes for extra reinforcement, and which partially projects over a transverse edge in the shape of the bow 2-4.
    The gripping members 53 (53-1, 53-2, 53-3) are connected to a cross beam 59 which can be rotated about a central axis 59-1 by means of two hydraulic cylinders (59-2) engaging on ends of the cross beam 59. , 59-3). Still another embodiment of the gripper structure 5 is shown in Figures 4A (perspective view), 4B (top view) and 4C (front view). In this embodiment, the base 50 also comprises a robust steel frame (of approximately 300 tons for example), which is constructed from steel diagonal tubes, vertical tubes, and heat-formed steel tubes for extra reinforcement, and which is partly fitted with a horizontal beam 50-4. over a transverse edge in the shape of the bow 2-4. The gripping members 53 (53-1, 53-2, 53-3) are rotatably connected to one end of the horizontal beam 50-4 whereby the face 54 of the gripping members 53 can be rotated from a horizontal position A to a vertical position B In the embodiments shown, the gripping members (53-1, 53-2, 53-3) together form a circular cross-section in the closed position. It should be noted that the gripping members 53 are preferably designed to be adapted for different object sizes and diameters. For example, it can be useful to be able to accommodate monopile diameters of, for example, from 8 meters to 11 meters and more.
    It is furthermore advantageous if the gripping members (53-1, 53-2) can be opened and closed remotely with a remote control. For instance, the gripping members (53-1, 53-2) can be opened to receive a monopile 4 (see figure 6) or other object suspended in horizontal position from the booms (3-1, 3-2). Once a casing part 40 of the monopile 4 is enclosed between the gripping members (53-1, 53-2) and an underside 41 of the monopile is supported on the bottom bracket 57-3 of the support 57, the monopile 4 can be mounted with a boom (3 -1, 3-1) can be erected, wherein the gripping construction 5 ensures that any movement in the longitudinal direction 13 and in athwartship direction of the casing part 40 can in principle be counteracted.
    The dimensions of the support 57 can also be adapted to the object dimensions to be accommodated. For example, it can be useful to choose the length of the arms (57-1, 57-2) 30-40 meters, for example 37.5 meters, and the length of the bottom bracket 57-3, for example about 15 meters, taking into account a monopole diameter of 15 meters for example. The bottom bracket 57-3 ensures, among other things, a limitation of movement in a longitudinal direction 42 of the monopile 4 during the erection of the monopile 4. This also relieves the boom.
    The sliding device (51, 56) allows a movement of a monopile suspended in a boom (3-1, 3-2) towards the boom (3-1, 3-2) from which the monopile 4 is suspended, as will be further explained below.
    The gripping structure 5 is further provided with (incorporated in the base 50 and therefore not visible) motion damping means 60, which are schematically represented by the spring symbol, and are adapted to damp movements of the gripping members 53 relative to the working deck 20, in the in particular to damp movements of the gripping members 53 parallel to the athwartship direction. The movement-damping means 60 ensure that a deflection of a monopile 4 suspended from a boom can indeed take place, but this is increasingly counteracted as the deflection increases. Thus, pendulum movements of the monopile 4 are damped. The motion damping means 60 may comprise a mechanical spring means arranged between the gripping members 53 and the working deck 20, but other embodiments are also possible.
    In use, one of the booms (3-1, 3-2), e.g. port boom 3-2- 2-2 with an underside can be a distance 62 further aft (towards the stern 2-3) than the starboard boom 3-1 2-1.
    This relative position can be achieved by sliding the port boom 3-2 over the rail guide 21 .
    With reference to figures 6-9, an embodiment of a method for lifting and placing a monopile 4 on a ground is shown.
    As shown in figure 6, a monopile 4 transported by a vessel is brought floating in a substantially horizontal position in the vicinity of the platform 1, wherein the platform 1 is positioned such that the monopile 4 can be anchored in the underwater bottom at the desired underwater position. The monopile 4 is herein positioned with its longitudinal direction 42 substantially parallel to the stem 2-4 (the athwartship edge where the gripping construction 5 is located). A sling 61 ('belly sling') suspended from a second boom 3-2 and arranged around a second casing part 43 of the monopile 4 can be helpful in this regard. The sling 61 here runs around the trunnions 43 arranged on the casing part 43 of the monopile 4 (see figure 8). Subsequently, the gripping members (53-1, 53-2) of the gripping construction 5 are opened and a first casing part 40 is placed between the gripping members (53-1, 53-2), to the extent that an underside 41 of the monopile 4 comes up against the bottom bracket 57-3 of the support 57 has been moved. Thereafter, the gripping members (53-1, 53-2) are closed until they enclose the skirt portion 40, as shown in Fig. 7A, for example.
    First, the gripping construction 5 is positioned on a first longitudinal side of the platform 1 at the height of a first boom 3-1. In the embodiment shown in figure 7, the first longitudinal side is the starboard side 2-1. As has already been described above, a first casing part 40 is subsequently engaged with the gripping members (53-1, 53-2) of the gripping construction 5, wherein the monopile 4 is floating in a substantially horizontal position.
    After another second skirt portion 43 has been engaged with the sling 61, the sling 61 being connected to a second boom 3-2 positioned on the starboard side 2-1, the second skirt portion 43 is joined to the second boom 3-2 (with the auxiliary boom 30-2 is also used) so that the monopile 4 rotates around the gripping structure 5 from the horizontal position shown in Fig. 7A to the final substantially vertical position shown in Fig. 7D. As indicated in figures 7B and 7D, the gripping construction 5 herein moves in the athwartship direction 10 over the rail guide 56 of the first boom 3-1 in the direction of the second boom 3-2. This achieves, among other things, that the slings 61 remain substantially vertically oriented, which benefits the stability of the monopile 4 during erection. The plane 54 of the gripping members 53 herein rotates about the longitudinal axis 55 from a vertical position B (Figure 7A) to a horizontal position A (Figure 7D). In the meantime, any rocking movements of the monopile 4 are damped by damping movements of the gripping members (53-1, 53-2) parallel to the athwartship direction 10 relative to the working deck 20 with the movement damping means 60.
    In order to facilitate the erection of the monopile 4, the first skirt part 40 and the second skirt part 43 are located at a distance 44 different from each other, and moreover on either side of the center of gravity 45 of the monopile, see for example figure 8. It will be clear In order to erect the monopile 4 it is recommended that the gripping construction 5 engages the monopile 4 hanging from the second boom 3-2 at a distance from the hoisting hoists 32 of the second boom 3-2.
    In order to subsequently be able to lower the monopile (see figure 8) in the vertical position in the direction of the underwater bottom, the support 57 present on the underside 41 of the monopile 4 is rotated through an angle of, for example, 5-10 degrees from a support position C. in an unsupported position D.
    The monopile 4 is then lowered to the underwater bottom by the second boom 3-2, and uncoupled therefrom as soon as the underside 41 of the monopile 4 has reached the underwater bottom (Figure 9A). In this condition, the monopile 4 is restrained in all horizontal directions by the gripping structure 5 and in the vertical direction by the underwater bottom. In the subsequent steps shown in figures 9A-9E, the monopile 4 is lowered into the substantially horizontal position onto or into the underwater bottom (figure 9A). Subsequently, the monopile 4 is fixed in the underwater bed with a driving means in the form of a pneumatic hammer 63. This is done by connecting the second boom 3-2 to the hammer 62 (fig. 9A), which is subsequently lifted in a number of steps 9B-9D and, according to figure 9E, is placed on a top side of the monopile 4 resting on the underwater bottom. With the hammer 63 in this position, the monopile 4 is then driven into the underwater bed until the desired depth is reached.
    Once the fixation has been carried out as desired, the monopile 4 is uncoupled from the gripping construction 5 by opening the gripping members (53-1, 53-2) and withdrawing it from the first casing part 40. The platform 1 is then carried away to a next one. position.
    权利要求:
    Claims (25)
    [1]
    1. Device for lifting and placing on an underground an elongate object of at least 200 tons, comprising a floating platform with a working deck on which a lifting device for lifting the object is mounted, the lifting device being two in an athwartship direction of the platform comprises spaced A-frame booms pivotally connected about an athwart axis of the platform to the working deck, and which are therefor in force-transmitting communication with two corresponding A-frame-shaped support structures mounted on the working deck, wherein the lifting device further comprises a gripping structure connected to the working deck with gripping members adapted to engage a shell portion of the object, and extending over an athwartship edge of the platform, the gripping structure extending in the athwartship direction across the working deck, and least between the booms, is movable.
    [2]
    Apparatus according to claim 1, wherein the gripping members lie in a plane and the plane is rotatable about a longitudinal axis between a horizontal and a vertical position,
    [3]
    An apparatus according to claim 1 or 2, wherein the gripping members are movable between an open position, in which the casing part of the object can be received by the gripping members, and a closed position of the gripping members.
    [4]
    An apparatus according to any one of the preceding claims, wherein the gripping structure further comprises a support which is adapted to support an underside of the object during lifting.
    [5]
    Device as claimed in claim 4, wherein the support comprises two arms attached to the gripping structure.
    [6]
    Device according to claim 5, wherein the support is U-shaped.
    [7]
    Apparatus according to any one of the preceding claims, wherein the gripping structure BE2020/5220 further comprises motion damping means, which are adapted to dampen movements of the gripping members relative to the working deck.
    [8]
    Device as claimed in claim 7, wherein the movement damping means are designed to damp movements of the gripping members parallel to the athwartship direction.
    [9]
    Device as claimed in any of the foregoing claims, wherein the gripping construction comprises a truss frame connected to the working deck, to which the gripping members are attached.
    [10]
    An apparatus according to any one of claims 2-9, wherein the gripping structure comprises a rotary motor connected to the working deck and adapted to rotate the plane of the gripping members about the longitudinal axis between the horizontal and the vertical position,
    [11]
    An apparatus according to any one of the preceding claims, wherein the force-transmitting connection between each boom and the corresponding A-frame-shaped support structure comprises a tension cable extending between the two.
    [12]
    Apparatus as claimed in any of the foregoing claims, wherein at least one of the two booms is movable in the longitudinal direction over the working deck.
    [13]
    13. Device as claimed in any of the foregoing claims, wherein the object can be picked up at a lifting point of one of the two booms, and the gripping construction is designed to grip the object hanging from the relevant boom at a distance from the lifting point.
    [14]
    14. Device as claimed in any of the foregoing claims, wherein the object is the monopile of a wind turbine and the subsoil is an underwater bed.
    [15]
    A method for lifting and placing an elongate object of at least 200 tons on a ground, the method comprising the steps of a) providing a device according to any one of the preceding claims; | BE2020/5220 b) positioning the grab structure on a first longitudinal side of the platform at the height of a first boom; c) engaging a first casing part of the object with the gripping members of the gripping construction in a substantially horizontal position; d) gripping with a sling another second jacket part of the object in substantially horizontal position, wherein the sling is connected to a second boom positioned opposite on the longitudinal side; e) raising the second skirt portion with the second boom so that the object rotates about the gripper structure from the horizontal position to a substantially vertical position; wherein the grab structure moves in the athwartship direction from the first to the second boom during step e).
    [16]
    A method according to claim 15, wherein the gripping members lie in a plane and the plane rotates in step e) about a longitudinal axis between a horizontal and a vertical position.
    [17]
    A method according to claim 15 or 16, wherein an underside of the object is supported with a support at least during lifting.
    [18]
    A method according to any one of claims 15-17, wherein movements of the gripping members relative to the working deck are damped.
    [19]
    A method according to claim 18, wherein movements of the gripping members parallel to the athwartship direction are damped.
    [20]
    A method according to any one of claims 15-19, wherein the second boom has moved relative to the first boom in the longitudinal direction across the working deck to a position further away from the athwartship edge - where the grab structure is located - than the position of the first boom.
    [21]
    A method according to any one of claims 15-20, wherein the first and second casing parts are spaced from each other and on either side of the center of gravity of the object.
    [22]
    A method according to any one of claims 15-21, wherein the second skirt portion comprises trunnions with which the sling can engage.
    [23]
    A method according to any one of claims 15-22, further comprising the steps of: f) lowering the object into the substantially vertical position onto or into the ground; g) fixing the object relative to the substrate with a pile driver; and h) decoupling the object from the device.
    [24]
    A method according to any one of claims 17-24, wherein the support on the underside of the object is removed prior to step f).
    [25]
    A method according to any one of claims 15-24, wherein the object is the monopile of a wind turbine and the subsoil is an underwater bed.
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    同族专利:
    公开号 | 公开日
    BE1028183A9|2021-11-24|
    BE1028183A1|2021-10-27|
    EP3889029A1|2021-10-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP2886722A1|2013-11-04|2015-06-24|GeoSea NV|Device and method for placing a pile|
    WO2019103611A2|2017-11-27|2019-05-31|Itrec B.V.|A method for installation of a pylon section of an off shore wind turbine and a vessel for performing such a method|
    GB2434823A|2006-02-06|2007-08-08|Engineering Business Ltd|Transport and installation of offshore structures|
    NL2018066B1|2016-12-23|2018-07-02|Itrec Bv|A method for installation of a pile adapted to support an offshore wind turbine, wave-induced motion compensated pile holding system, vessel, and pile holder.|
    法律状态:
    2021-11-17| FG| Patent granted|Effective date: 20211103 |
    优先权:
    申请号 | 申请日 | 专利标题
    BE20205220A|BE1028183A9|2020-04-03|2020-04-03|DEVICE FOR LIFTING AND PLACING AN Elongated OBJECT ON A SURFACE AND ACCORDING PROCEDURE|BE20205220A| BE1028183A9|2020-04-03|2020-04-03|DEVICE FOR LIFTING AND PLACING AN Elongated OBJECT ON A SURFACE AND ACCORDING PROCEDURE|
    EP21166767.0A| EP3889029A1|2020-04-03|2021-04-01|Device for lifting and placing on a ground surface of an elongate object, and corresponding method|
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