KR20160097529A - Floating Crane for Installation Offshore Wind Tower - Google Patents

Abstract

The present invention relates to an offshore crane to easily install a wind tower on a basic structure installed offshore without using a large special crane, comprising: a boom of a certain length; a supporter with a certain inclination on the top end unit of the boom; a lifting fork in the shape of a flat plate to lift and support the wind tower; and a supporting member of the lifting fork, which includes: a second pulley; a third pulley; a affixing ring; and a hook. The surface of a barge has a plurality of affixing pieces and a winch. The affixing pieces are respectively combined with the hook. The hook is combined with the fourth pulley. A wire rope is combined by passing through the winch and the fourth pulley. The wire rope is pulled and released by the operation of the winch, and one side of the lifting fork is elevated and lowered. When a pin lug of the wind tower is settled on a pin groove on the other side of the lifting fork, it works as a resisting force to the external force to keep the balance of the entire lifting fork. The present invention is able to easily install a wind tower, which is assembled on land, on a basic structure installed offshore even without using a large special crane or the like, to increase the height of the wind tower installed offshore, to keep the balance of the lifting fork on the offshore crane, to prevent the lifting fork from shaking to the sides, to prevent the wind tower from shaking to the sides or rotating when it is being installed, and to improve stability.

Description

{Floating Crane for Installation of Offshore Wind Tower}

The present invention relates to a floating crane for installing a wind tower, and more particularly, to a floating crane capable of easily installing a wind tower on a foundation structure installed on the sea without using a large special crane at sea, The present invention relates to a marine crane capable of maintaining the balance and preventing the lifting fork from being shaken to the left and right and enhancing stability by preventing the wind tower from shaking or rotating from side to side when the wind tower is installed.

Generally, wind power generation is a renewable energy resource rich and constantly reproduced. It is distributed not only in a wide area but also as a clean energy source, and it does not emit greenhouse gas due to power generation. .

Wind power generation is classified as a distributed power supply in terms of system operation in that it generates electricity regardless of demand when the wind is blowing because it is developed using wind, which is natural energy.

Wind turbine systems are divided into mechanical systems, electrical systems, and control systems that control wind turbines. Also, it is divided into a hub system including a blade, a nutshell equipped with various machines, an electric and a control device, and a hub system at the upper part and a tower system for supporting the weight of the nun cell from the ground.

Wind turbines are divided into land and marine types depending on the installation location. In particular, offshore wind power generation enables the production of wind power by the construction of wind power generation complexes in water or on water. From the point of view of the sea, not only the sea, but also the inland areas such as lakes, . Moreover, the offshore wind power generation is more stable than the onshore wind turbine, has good wind speed, has few obstacles, noise and propagation obstacles, can be used for the transportation and installation of large-sized wind power generators, Since most of the area is located on the coast, there is an advantage in terms of transmission cost.

Conventionally, a wind turbine installed on the sea has been constructed on land, then loaded on a barge, towed to a tug to the installation area, and installed on a foundation structure installed on the sea using a crane line equipped with a large crane . In addition, major components of wind turbines are assembled and installed directly at sea. That is, it is necessary to assemble the wind tower of about 1 ~ 3 stages, the hub assembly, and the blade assembly at the same time or after assembling them one by one, and then lift it up by using a crane installed on a large crane line. The height of the boom is more important factor than the load capacity of the crane.

In order to efficiently develop the wind turbine, the height of the wind turbine is gradually increasing, and the length of the wind turbine is in the range of 80 ~ 130m. It is difficult to supply a crane equipped with a large crane capable of lifting the wind turbine vertically. Furthermore, installation of wind turbines at depths of sea will be subject to more constraints.

As a conventional technique, Korean Patent Laid-Open Publication No. 10-2010-0045404 (published on May 3, 2010) provides a construction device 50 for building a float-type offshore wind power generator 10 in a safe and smooth manner A construction device 50 for constructing an offshore wind power generator 10 by a crane line S is mounted on a crane line S at a working position in the up and down direction, And at least a pair of arm portions (60) provided with a grip portion capable of attaching and detaching a tower portion (20) having a plurality of axially divided portions, and sliding along the guide member (51) . In addition to the complicated structure, it has disadvantages in that it is disadvantageous in terms of assemblability and safety, and takes a lot of operation time and cost in order to mount the offshore wind power generator while assembling the offshore wind power generator by waves or waves.

Korean Patent Publication No. 10-2010-0045404 (Published May 3, 2010): Construction method and construction apparatus for offshore wind power generation apparatus

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wind turbine tower assembled onshore so that it can be easily installed on a foundation structure installed on the sea without using a large special crane in the sea.

In addition, the present invention makes it possible to maintain the equilibrium of the lifting fork in a floating crane and prevent the lifting fork from swaying from side to side, and to improve the stability by preventing the wind tower from shaking or rotating from side to side when installing a wind tower It is another purpose.

In addition, the present invention maximizes the efficiency of wind power generation by making it possible to further heighten the height of the wind power tower installed at the sea, and stably transporting, separating, installing and fixing the wind tower assembled on the land to the installation place Another purpose is to minimize the time and cost of installation.

To achieve the above object, according to the present invention, there is provided a boom comprising: a boom having a lower end portion hinged to a pants surface and having a predetermined length connected to a winch and a wire rope from a back tray, A support having an inclination angle at a predetermined angle with respect to the boom top; A plurality of fixing pieces are provided on one side of the flat plate and a holder on which the wind tower is inserted and supported, and pin grooves protruding from the center of gravity of the wind tower are formed on the surface of the holder, A lifting fork having a retaining ring to support the lifting tower; And a pair of second pulleys fixedly installed on both sides of the upper end of the supporter and pro- vided with a winch and a wire, a third pulley connected to the wire rope via the second pulley and lifted and lowered according to the pulling and unwinding of the wire rope And a lifting fork support member having a hook coupled to the retaining ring protruding from the surface of the lifting fork in the third pulley, wherein a plurality of securing pieces and a winch are provided on the surface of the pants, And the wire rope is coupled through the winch and the fourth pulley, so that the wire rope is pulled and released by the operation of the winch, so that the lifting fork The one side is raised and lowered to act as a resistance force against the external force when the pin lug of the wind tower is seated in the pin groove from the other side of the lifting fork, And that is configured to maintain the equilibrium of a fork full basic features.

In the present invention, a pin groove is formed on the upper surface of the holder so as to correspond to the wind tower diameter of the pin lug position, and a rod-shaped holder width adjustment Member may be further constructed.

Further, in the present invention, a winch provided on the surface of the pants; The lifting fork according to any one of claims 1 to 3, further comprising a fixing member provided on both sides of the bottom surface of the lifting fork or on both sides of the lifting fork, wherein the hook is engaged with the fixing member and the fifth pulley is engaged with the hook, And the wire rope is coupled to the winch through the fifth pulley so that the sea anchor is lifted and lowered due to the pulling and unwinding of the wire rope by the operation of the winch so that the lifting fork is prevented from swaying to the left and right . ≪ / RTI >

Further, in the present invention, a plurality of fixing rings are provided on both sides of the body of the wind tower at regular intervals in the vertical direction; A hook is provided on a part of the fixing ring on one side or both sides of the wind tower body and a sixth pulley is coupled to the hook and the wire rope is passed through the winch and the sixth pulley So that the tension of the wire rope can be maintained in accordance with the pulling and unwinding of the wire rope by the operation of the winch so as to prevent the wind tower from being shaken or rotated from side to side.

Further, in the present invention, the inner side surface of the holder may be square or arcuate.

Further, in the present invention, the pin lug may have a cylindrical or semicylindrical shape, and the pin groove may be formed in an arc shape.

Further, in the present invention, the lifting fork may be further provided with an electronic leveling device for allowing the balance to be confirmed when the wind tower is lifted.

According to the present invention, a wind tower assembled on the land can be easily installed on a foundation structure installed on the sea without using a special large crane or the like, and it is possible to maintain the balance of the lifting fork in the sea crane, It is possible to prevent the wind tower from swinging or turning when the wind tower is installed. Thus, it is possible to enhance the stability, and the height of the wind tower installed at the sea can be further improved, Can be maximized, and the operation for installing the wind tower is stable and simple, which has the advantage of reducing the working time and installation cost.

FIG. 1 is a side view showing a marine crane for installing a wind tower as an embodiment according to the present invention.
Fig. 2 is a perspective view showing a main part on a boom, a lifting fork, and a pants in a marine cranes for installing a wind tower according to the present invention.
3 is a perspective view showing a main part of a boom and a lifting fork in a marine crane for installing a wind tower according to the present invention.
4 is an exploded perspective view of a lifting fork in a floating crane for installing a wind tower according to the present invention.
5 is a view showing a configuration for maintaining the balance of the entire lifting fork in a floating crane for installing a wind tower according to the present invention.
6 is a view showing a configuration related to a seed anchor in a marine crane for installing a wind tower according to the present invention.
7 is a view showing a configuration for preventing the wind tower from shaking or rotating from side to side in a floating crane for installing a wind tower according to the present invention.
8A to 8C are views showing a process of installing a wind tower on the sea using a marine crane for installing a wind tower according to the present invention.

Hereinafter, a floating crane for installing a wind tower according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1, a marine crane 10 (also known as a " forklift marine crane ") of the present invention includes a winch 12 and a back tray 13 on a barge 11, ) 20 is supported and lifted by a wire rope (14). The marine crane (10) of the present invention has a structure for more easily installing the wind tower (2) assembled on the land on the foundation structure already installed on the sea.

The lower end of the boom 20 having a predetermined length is hinged to the surface of the pants 11. A first pulley 15 is fixed to the upper end of the boom 20. The first pulley 15 of the boom 20 is connected to the winch 12 by a wire rope 14 and a plurality of pulleys and the like provided on the back tray 13 and the pants 11. Accordingly, the boom 20 is raised and lowered at a predetermined angle of inclination around the hinge axis of the lower end portion by the operation of the winch 12. [

1 to 3, in the marine crane 10 of the present invention, the support 21 is formed at an upper end portion of the boom 20 at an inclined angle at an angle. A groove 22 is formed in the support base 21. A pair of second pulleys 23 are fixed to both sides of the top of the supporter 21 and the second pulley 23 is connected to the winch 12 and the wire rope 24. A third pulley 25 is coupled to each wire rope 24. The third pulley 25 is lifted and lowered according to the pulling and unwinding of the wire rope 24. A hook 26 is coupled to the third pulley 25, respectively. The supporting rods 21 to which the second pulleys 23 are coupled are formed with through holes upwardly and downwardly to connect the wire ropes 24 therethrough. The second pulley 23, the wire rope 24, the third pulley 25 and the hook 26 are support members for supporting the lifting fork 27.

2 and 5, the lifting fork 27 of the present invention is in the form of a substantially flat plate. The lifting fork 27 has a plurality of fixing pieces 40 at one side of the lifting fork 27, A plurality of fastening pieces 41 and a winch 50 are provided on the surface of the pants 11. A hook 60 is coupled to each of the fastening pieces 40 and 41, And the fourth pulley 70 is coupled to the wire rope 80. The wire rope 80 is coupled to the winch 50 through the fourth pulley 70 so that the wire rope 80 One side of the lifting fork (27) is lifted and lowered by pulling and pulling. This serves to resist the external force when the pin lug 8 protruding from the other side of the lifting fork 27, which will be described later, is projected to the center of gravity of the wind tower in the pin groove 28, so that the balance of the entire lifting fork 27 It is to keep it.

As shown in FIGS. 2 to 4, a holder 29 is formed on the other side of the lifting fork 27 to receive and support the wind tower. The inside surface of the holder 29 may be square or arcuate. On the surface of the holder 29 is formed a pin groove 28 on which a pin lug 8 protruding from the center of gravity of the wind tower is seated. Here, the wind tower provided with the pin lug 8 is seated in the pin groove 28 of the lifting fork 27, so that the lifting fork 27 (from the center of gravity of the wind tower to the mechanism of the wind generator including the nacelle, hub, The entire height of the wind tower can be made even higher. The pin lugs 8 are formed in a pair of circular or semicircular shapes and the pin grooves 28 are formed in an arc shape corresponding to the pin lugs 8. In order to lift the wind tower of various sizes, the width of the inside surface of the holder 29 must correspond to the wind tower diameter at the position of the pin lug 8. To this end, a pin groove 28 ' And a rod-shaped holder width adjusting member 90 having a protruding portion 91 fitted to the side groove 22 'in the holder 29 is formed on one side of the inner side of the holder by a fastener (not shown) It can be fixed to both sides.

 The pin lugs 8 may be fixed to the through holes formed in the wind tower body or members for fixing separate pin lugs to the wind tower body. Further, a plurality of fixing rings 16 protrude from the surface of the lifting fork 27. The hook 26 of the third pulley 25 is engaged with the fixed ring 16. That is, on the left and right sides of the surface of the lifting fork 27, respectively. The fixing ring 16 to which the hook 26 of the third pulley 25 is coupled is selected from the plurality of fixing rings 16 according to the load of the wind tower or the size of the floating crane.

The boom 20 of the marine crane 10 of the present invention is provided with a first pulley 15 for adjusting the angle of the boom according to the pulling and unwinding of the wire rope 14 connected to the winch 12, At least four second pulleys 23 and third pulleys 25 are coupled to the lifting fork 27 so that the lifting fork 27 can be lifted and lowered according to the pulling and unwinding of the wire rope 24 connected to the winch 12.

In other words, the second pulley 23 and the third pulley 25 are for raising and lowering the entire lifting fork 27 and the fourth pulley 70 is raised and lowered only one side of the lifting fork 27, 27).

2 and 6, one or two sea anchors 61 having a large underwater resistance are attached to the lifting fork 27 in order to prevent the lifting fork 27 from shaking to the left and right, When the sea anchor 61 is provided on one side of the lifting fork 27, the lifting fork 27 is fixed to both sides of the lifting fork 27 when two sea anchors 61 are provided. A hook 62 is coupled to the fixing piece 42 and a fifth pulley 71 is attached to the hook 62. The hook 62 is engaged with the hook 42, A combined sea anchor 61 is coupled to another fifth pulley 71 which is coupled to the winch 51 via a fifth pulley 71 As the wire rope 81 is pulled and released by the operation of the winch 51, the sea anchor 61 is raised and lowered. Here, the seed anchor 61 is preferably in the form of a hopper.

2 and 7, the floating crane 10 of the present invention can be used to lift the wind tower 2 by a lifting fork 27 to install the wind tower 2 on the foundation structure 1 A plurality of fixed hooks 16 'are provided on both sides of the body of the wind tower at regular intervals in the vertical direction to prevent the wind tower from shaking or turning to the left and right. At the surface of the pants 11, And a hook 63 is coupled to one or two of the fixing rings 16 'on one side or both sides of the wind tower body and a sixth pulley 72 is coupled to the hook 63, The wire rope 82 is coupled via the winch 52 and the sixth pulley 72 so that the wire rope 82 is pulled and released by the operation of the winch 52 corresponding to the height of the wind tower The tension of the wire rope 82 is maintained so that the wind tower swings to the left or right or rotates .

On the other hand, the lifting fork 27 is preferably provided with an electronic leveling device so that the balance can be confirmed when the wind tower 2 is lifted.

A method of installing a wind tower using a floating crane for installing a wind tower according to the present invention will be described with reference to FIG.

A multi-stage tower, a nutshell, a hub, and a blade, which are major components of a wind tower, are assembled together on a land (S10). The assembled wind turbine tower is lifted up by a large crane mounted on the ground to rise (S20).

The assembled wind turbine tower is mounted on the barge 30 for transportation and fixed by using a plurality of fixing wires 31 or the like (S30). At this time, it is preferable that a flange portion is provided on the surface of the barge for transportation 30 and the flange formed on the bottom portion of the wind tower is coupled with a fixing member or the like. Then, the assembled wind turbine tower 30 is towed by the tugboat 30 and then moved to the sea crane 10 of the present invention at the position where the assembled wind tower is installed (S40).

8A, the barge 30 for transportation is moved to a position close to the marine crane 10 of the present invention.

The marine crane 10 of the present invention separates the wind tower fixed to the barge 30 for transportation (S50). That is, the detailed flow of lifting the wind tower assembled at the barge 30 for transportation is as follows.

The boom 20 of the floating crane 10 is raised or lowered by the operation of the winch 12 after moving the floating crane 10 of the present invention toward the wind tower loaded on the barge 30 for transportation (S51). At this time, the lifting fork 27 on the boom 20 is positioned below the pin lug 8 coupled to the center of gravity of the assembled wind tower (S52), and the assembled wind tower body is lifted by the lifting fork 27 And the hook 63 is engaged with the fixing ring 16 'of the wind tower body so that the wire rope 82 is pulled and released by the operation of the winch 52, The tension of the wind power tower 82 is maintained to prevent the wind power tower from swinging left or right or rotating (S53). At this time, in order to make the width of the inner side of the holder 29 correspond to the diameter of the wind tower recognized in advance, the holder width adjusting member 90 is preliminarily fixed to one side or both sides of the inner side of the holder, and the lifting fork 27 One or two sea anchors 61 may be pre-suspended on the lifting fork 27 to prevent it from swaying.

 The lifting fork 27 is lifted up to a predetermined height so that the pin lug 8 of the assembled wind turbine tower is positioned in the pin groove 28 of the holder 29 at step S54. And the fixing wire 31 are separated from each other (S55). The boom 20 is lifted up to a certain height so that the assembled wind tower is completely separated from the barge 30 for transportation and the wire rope 80 is pulled and released by the operation of the winch 50 When the pin lug 8 of the wind tower is seated in the pin groove 28 from the other side of the lifting fork 27 while the one side of the lifting fork 27 is raised and lowered, (S56), and the transport barge 30 is retracted (S57).

8B, the boom 20 of the present invention's lifting crane 10 and the lifting fork 27 are lifted to support the assembled wind tower.

On the other hand, the assembled wind turbine tower is positioned and fixed on the foundation structure 1 already installed on the sea with the marine crane 10 of the present invention (S60). That is, the detailed flow of positioning the lifting tower of the floating crane 10 in the foundation structure is as follows.

In the already installed foundation structure, that is, the foundation structure in which the marine crane 10 of the present invention is installed in the wind tower in which the assembly of the present invention is completed, by moving the marine crane 10 of the present invention lifting and supporting the assembled wind turbine tower A foundation structure is to be installed, and the boom 20 of the present invention's crane 10 is placed on the foundation structure 1 (S61). At this time, it is necessary to operate the winches 12, 50 to pull or pull the wire ropes 14, 24, 80 so that the height of the boom 20 and the height and equilibrium of the lifting fork 27 are finely adjusted.

After the flange 4 of the wind tower completed to be assembled on the flange provided on the upper surface of the foundation structure 1 with the marine crane 10 of the present invention is joined to the foundation structure 1 with a fixing member or the like (S62). The wire rope 80 is pulled or loosened by the operation of the winch 50 so that the wire rope 80 is pulled out by the operation of the winch 50. As a result, And detaches the hook 63 from the fixed hook 16 'of the wind tower body.

When the assembled wind turbine tower is fixed on the foundation structure 1, the boom 20 of the floating crane 10 is lowered (S63) and the boom 20 of the floating crane 10 is retracted (S64). This completes the land-based assembly, marine transport and installation of wind towers.

While the invention has been shown and described with respect to the specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Anyone who has it will know it easily.

1: Foundation structure 2: Wind tower 3: Tower 4: Flange 5: Nacelle 6: Hub 7: Blade 8: Pin lug 10: Marine crane 11: Pants 12,50,51,52: Winch 13: , A hook (21), a support (22, 22 '), a groove (26, 60, 62, 63), a hook 27: Lifting fork 28, 28 ': Pin groove 29: Holder 30: Transport barge 31: Fixing wire 40, 41, 42: Fixing piece 61: Seed anchor 90:

Claims (7)

A boom 20 having a predetermined length to which a winch 12 and a wire rope 14 are connected from a back tray 13 to a first pulley 15 hinged to the surface of the pants 11 at a lower end and installed at an upper end;
A support table 21 formed at an upper end of the boom 20 and having an inclination angle at a predetermined angle;
A plurality of fixing pieces 40 are provided on one side of the flat plate and a holder 29 is formed on the other side of the holder 29 to receive and support the wind tower and a pin lug 8 projecting from the center of gravity of the wind tower A lifting fork 27 provided with a plurality of fixing rings 16 on the surface thereof for lifting and supporting the wind tower;
And a pair of second pulleys 23 connected to the winch 12 and the wire ropes 24 and fixed to both sides of the upper end of the support frame 21 via wire ropes 24 And the third pulley 25 is provided with the fixing ring 16 protruding from the surface of the lifting fork 27. The third pulley 25 is connected to the third pulley 25 by the wire rope 24, A support member of a lifting fork, provided with a hook (26)
A plurality of fastening pieces 41 and a winch 50 are provided on the surface of the pants 11 and hooks 60 are respectively engaged with the fastening pieces 40 and 41, And the wire rope 80 is coupled to the winch 50 through the fourth pulley 70 so that the wire rope 80 is pulled and loosened by the operation of the winch 50 One side of the lifting fork 27 is lifted and lowered to act as a resistance force against the external force when the pin lug 8 of the wind tower is seated in the pin groove 28 from the other side of the lifting fork 27, ) Of the wind turbine tower (1).
The method according to claim 1,
A pin groove 28 'is formed on the upper surface of the holder 29 so as to correspond to the wind tower diameter at the position of the pin lug 8 and a side wall groove 22' Characterized in that a rod-shaped holder width adjusting member (90) with a protruding portion (91) to be joined is additionally constituted.
The method according to claim 1,
A winch 51 provided on the surface of the pants 11;
Further comprising a fixing piece (42) provided at the bottom center of the lifting fork (27) or on both sides of the lifting fork (27)
A hook 62 is coupled to the fixing piece 42 and a fifth pulley 71 is coupled to the hook 62. The seed anchor 61 in the water is coupled to another fifth pulley 71, The rope 81 is connected to the winch 51 through the fifth pulley 71 and is pulled and pulled by the operation of the winch 51 to form a sea anchor 61) is further raised and lowered to prevent the lifting fork (27) from swaying from side to side.
The method according to claim 1,
A plurality of fixing rings 16 'provided on both sides of the body of the wind tower at regular intervals in the vertical direction;
Further comprising a winch (52) provided on the surface of the pants (11)
A hook 63 is coupled to a part of the fixing ring 16 'on one side or both sides of the wind tower body and a sixth pulley 72 is coupled to the hook 63. The wire rope 82 is connected to the winch 52, So that the tension of the wire rope 82 is maintained by the pulling and unwinding of the wire rope 82 by the operation of the winch 52 and the wind tower is shaken to the left and right Wherein the crane is further configured to prevent rotation of the crane.
The method according to claim 1,
And the inner side surface of the holder (29) is square or arcuate.
The method according to claim 1,
Wherein the pin lug (8) has a cylindrical or semicylindrical shape and the pin groove (28) has an arc shape.
The method according to claim 1,
Wherein the lifting fork (27) is further provided with an electronic leveling device for checking the balance when lifting the wind tower (2).

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