JP2013035361A - Floating body type structure in floating body type offshore wind power generation device, method for manufacturing the same, and method for installing the same - Google Patents

Abstract

The present invention provides a floating structure in a floating offshore wind power generator utilizing both the spar type and streamline type characteristics, and a manufacturing method and an installation method thereof.
In a floating offshore wind power generator comprising a floating structure, a tower standing on the floating structure, and a windmill provided on the top of the tower, the floating structure The outer shape is streamlined to form a ship-like structure with low resistance, and ballasts 5 for improving stability are suspended below the floating structure or on both sides in the width direction of the floating structure. Let it be the floating structure 1 in the floating offshore wind power generator.
[Selection] Figure 1

Description

  The present invention relates to a floating structure in a floating offshore wind power generator, a method for manufacturing a floating offshore wind power generator, and a method for installing the same.

  Conventionally, as shown in FIG. 11A, a spar-type offshore wind power generator having excellent hydraulic stability, such as a fishing float, is known as an offshore wind power generator. A ballast is installed in the lower part of the structure, and the restoring property is obtained by the gravity acting on the ballast.

  Further, as shown in FIG. 11B, a structure in which the outer shape of the structure is a streamline shape is also known. This does not extend in the depth direction of the water depth and obtain the buoyancy of the structure, but expands the structure in the plane direction to obtain the buoyancy acting on it and obtain the restoring force. Further, since this streamlined structure has less draft, it can be built in the dock of the shipyard, and as shown in FIGS. 12A and 12B, a plurality of floating structures can be formed. In addition, since the wave resistance is small in shape, one-point mooring is possible.

JP 2007-182021 A

  However, in the conventional floating structure in offshore wind power generation, a floating structure utilizing the advantages of the spar type and the streamline type has not been realized. Therefore, a floating structure in a floating offshore wind power generator according to the present invention, a method for manufacturing a floating offshore wind power generator, and a method for installing the same have been proposed in order to solve such problems.

  The gist for achieving the object by solving the above-described problems of the floating structure in the floating offshore wind power generator according to the present invention is as follows: a floating structure, a tower standing on the floating structure, and the tower In the floating offshore wind power generator comprising a windmill provided on the upper part of the floating structure, the floating structure has a streamlined outer shape to form a ship-shaped structure with low resistance, or at the bottom of the floating structure, or the This is because ballasts for improving stability are suspended on both sides in the width direction of the floating structure.

In the ballast, a hinge structure is provided in the ballast mounting portion of the floating structure, and the ballast can be bent along the longitudinal direction of the structure.
Further, the ballast includes that a moving guide device and a moving drive device are provided so that the ballast can move in the vertical direction when provided on both sides in the width direction of the floating structure.
It also includes being able to moor at one point.

  The gist of the manufacturing method of the floating offshore wind power generator according to the present invention is as follows: a floating structure, a tower standing on the floating structure, a windmill provided on the top of the tower, and the floating structure When the floating offshore wind power generator is manufactured by assembling the ballast provided on the floating body, the ballast is bent or moved so that it does not protrude downward from the lower surface of the floating structure. It is to install and assemble to the formula structure.

  The gist of the installation method of the floating offshore wind turbine generator according to the present invention is that when the ballast is provided on the floating structure in the floating offshore wind turbine generator, the ballast is moved downward from the bottom surface of the floating structure. It is bent or moved so as not to protrude and is attached to a floating structure by assembling it, and after assembling the floating offshore wind power generator, the floating structure is rolled out on the ocean and then the ballast is floated. It is to move to a regular position in the formula structure.

  According to the floating structure in the floating offshore wind power generator of the present invention, the ship-shaped floating structure increases the volume in the plane direction to obtain buoyancy. It becomes possible to build by. In addition, the ballast suspended from the floating structure improves hydraulic stability, and the restoring force of the structure is obtained by the buoyancy acting on the ship-shaped floating structure. It has an excellent effect that it has a structure. Moreover, according to the manufacturing method and the installation method of the floating offshore wind power generator, since the ballast can be stored in the floating structure, it can be easily manufactured at a dock in a shipyard, etc. After unloading the floating structure, the floating structure can be stabilized by moving the ballast to a normal position on the ocean. When the ballast is moved to the proper position with respect to the floating structure, the ballast is moved to a safe place at the safe place and towed safely. Or move it to the position.

1 is a perspective view of a floating structure 1 in a floating offshore wind power generator according to the present invention. It is a perspective view (A) and (B) of floating structure 1a, 1b in the floating offshore wind power generator concerning the 2nd example of the present invention. It is a perspective view of the floating structure 1c in the floating offshore wind power generator according to the third embodiment of the present invention. It is a perspective view of the floating structure 1d in the floating offshore wind power generator according to the fourth embodiment of the present invention. It is a perspective view of the floating structure 1e in the floating offshore wind power generator which concerns on 5th Example of the same invention. It is explanatory drawing which shows the construction procedure from the assembly of the floating structure 1d in the said 4th Example to installation on the ocean, and explanatory drawing which shows a mode that a floating structure, a windmill, a ballast, etc. are assembled in a shipyard. It is explanatory drawing (B) which shows a mode that water is poured in in a dock and it begins to pour out. It is explanatory drawing (A) which shows a mode that the said floating body structure 1d is towed to an installation place, and explanatory drawing (B) which shows a mode that the anchor of the floating structure 1d was installed in the installation place. It is explanatory drawing (A) of the state which dropped the ballast 7 to the regular position, and explanatory drawing (B) which shows the state of completion of installation of the floating type offshore wind power generator 4. FIG. It is a perspective view of the some floating structure 1f in the floating type offshore wind power generator which concerns on 6th Example of the same invention. It is the perspective view (A) which shows the state which anchored the floating body type structure 1g at one point, and the perspective view (B) which shows a mode when the intermediate buoy 10 is provided further. It is a perspective view (A) and (B) of floating body type structures 11 and 12 in a floating type offshore wind power generator concerning a conventional example. It is a perspective view (A) and (B) of floating structure 13 and 14 in a floating type offshore wind power generator concerning other examples of a conventional example.

  As shown in FIG. 1, a floating structure 1 in a floating offshore wind power generator according to the present invention is a floating structure that combines a spar type and a ship shape. In addition, the manufacturing place of the floating offshore wind power generator in the present invention is not limited to the dock at the shipyard, but may be a floating dock, a quay or a land yard. Moreover, you may manufacture using those several places.

  As shown in FIG. 1, there is a floating offshore wind power generator 4 including the floating structure 1, a tower 2 standing on the floating structure 1, and a windmill 3 provided on the top of the tower 2. . The outer shape of the floating structure 1 is streamlined to form a ship-shaped structure with low resistance, and a ballast 5 for improving stability is suspended below the floating structure 1.

  The floating structure 1 has a structure with little resistance to waves, and the ballast increases the restoring force and improves stability against shaking.

  As shown in FIG. 2, the floating structure 1a according to the second embodiment is a modified example of the ballast 5, in which ballasts 6a and 6b are provided on the keels of the ship-shaped structures 1a and 1b. It is. This also provides the same effect as the ballast 5 of the first embodiment.

  As shown in FIG. 3, in the floating structure 1c according to the third embodiment, the ballast 7 suspended from the lower portion of the structure 1c is provided with a hinge structure at the ballast mounting portion. . Thereby, it can be bent along the longitudinal direction of the structure 1c. In this way, it is possible to construct a shipyard with a dog by reducing the draft at the time of construction. Further, when the structure 1c is installed at a predetermined position on the ocean, it may be hung with a winch or a wire, or may be operated with a hydraulic jack or the like to lower the ballast 7.

  As shown in FIG. 4, a pair of ballasts 7 and 7 for improving stability are suspended from both sides in the width direction of the floating structure 1d according to the fourth embodiment. As described above, a plurality of ballasts 7 can be provided to further improve the stability of the structure 1d.

  As shown in FIG. 5, the floating structure 1e according to the fifth embodiment is for movement so that the ballasts 8 can be moved in the vertical direction when the ballasts 8 are provided on both sides in the width direction of the floating structure 1e. A guide device (for example, a guide rail or the like not shown) and a moving drive device (not shown) are provided. As this moving drive device, for example, a vertical hoisting / lowering method using a winch, a rack and pinion method, a replacement jack-up method, or the like can be employed.

  Here, construction procedures from assembly of the floating structure 1d to installation at a predetermined location will be described with reference to FIGS. First, as shown in FIG. 6A, the wind turbine 3, the tower 2, and the ballast 7 are assembled to the floating structure 1d. The ballast 7 is stored. Then, as shown in FIG. 6B, water is poured into the dock to float the floating structure 1d.

  Next, as shown in FIG. 7 (A), the floating structure 1d is towed to a place where wind power generation is installed by a tugboat. Then, as shown in FIG. 7B, the anchor of the floating structure 1d is installed when it arrives at the installation location.

  As shown in FIG. 8A, the ballast 7 of the floating structure 1d is rotated counterclockwise and lowered to a normal position. Thereby, the installation of the floating structure 1d is completed (see FIG. 8B). The ballast 7 is moved to a proper position with respect to the floating structure 1d. The ballast 7 is moved out of the dock, moved to a safe place, and moved in a safe place. The stable performance of the floating structure 1d. By improving the towing speed, the towing speed is suppressed, but the towing can be performed more safely.

  In addition, as shown in FIG. 9, the floating structure 1 f according to the sixth embodiment includes a plurality of floating structures. In addition, in the drawing, the ballast 7 is single in the central structure 1f, but the present invention is not limited to this, and a plurality of ballasts 7 may be provided so as to be provided in each structure 1f.

  Further, as shown in FIG. 10 (A), the floating structure 1g is ship-shaped and has little wave resistance, so that the mooring chain 9 can be used for one-point mooring. Further, as shown in FIG. 10 (B), an intermediate buoy 10 is provided to connect the floating structure 1g and the mooring rope 10a, and the intermediate buoy 10 is connected to an anchor, thereby impacting the floating structure 1g. Can be relaxed.

1 Floating structure in a floating offshore wind power generator,
1a-1g Floating structure in a floating offshore wind power generator according to each embodiment,
2 Tower,
3 Windmill,
4 Floating offshore wind power generator,
5 Ballast,
6a, 6b Ballast keel,
7, 8 Ballast,
9 Mooring chain,
10 Intermediate buoy,
10a Mooring rope,
11-14 The floating type structure in the floating type offshore wind power generator concerning each conventional example.

Claims (6)

In a floating offshore wind power generator composed of a floating structure, a tower standing on the floating structure, and a windmill provided on the top of the tower,
The outer shape of the floating structure is streamlined to form a ship-shaped structure with low resistance,
A ballast for improving stability is suspended from the bottom of the floating structure or on both sides in the width direction of the floating structure;
A floating structure in a floating offshore wind power generator. The ballast is provided with a hinge structure at the ballast mounting portion of the floating structure, and can be bent along the longitudinal direction of the structure.
The floating structure in the floating offshore wind turbine generator according to claim 1. When the ballast is provided on both sides in the width direction of the floating structure, a movement guide device and a movement drive device are provided so that the ballast can move in the vertical direction.
The floating structure in the floating offshore wind turbine generator according to claim 1. Being able to moor at one point,
The floating structure in the floating offshore wind power generator according to any one of claims 1 to 3. A floating offshore wind power generator is manufactured by assembling a floating structure, a tower standing on the floating structure, a windmill provided on the top of the tower, and a ballast provided on the floating structure. At the time, the ballast is assembled by being bent or moved so as not to protrude downward from the lower surface of the floating structure, and being attached to the floating structure.
A method for manufacturing a floating offshore wind turbine generator. When a ballast is provided on a floating structure in a floating offshore wind power generator, the ballast is bent or moved so as not to protrude downward from the lower surface of the floating structure to be in a retracted state and floated. After mounting the structure and assembling the floating offshore wind power generator, moving the ballast structure offshore and then moving the ballast to a normal position in the floating structure;
The installation method of the floating offshore wind power generator characterized by these.

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