Attachment Inhibiting Member for Suppressing Attachment of Marine Organisms

Abstract

To provide an adherence suppression member suppressing adherence of marine organisms on an upper end part of a monopile during a period from installation of the monopile to installation of a transition piece.SOLUTION: An adherence suppression member is to suppress adherence of marine organisms on an upper end part of a pile installed in the seabed, being provided with a body part fitted on an upper end part of a pile, an opening part receiving sunshine inside from above, a holding part for its placement on the upper end part of the pile, and a reflection part in a conical shape fixed on an upper side of the holding part.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an adhesion suppression member that suppresses the adhesion of marine organisms by being attached to the piles of offshore wind power generation facilities.

Background Art

[0002] As disclosed in Patent Document 1, it is known that power generation using clean and renewable wind energy is performed by installing offshore wind power generation facilities on the sea. As the basic structure of offshore wind power generation facilities, a connection structure is known in which after driving a pile (monopile) into the seabed, a connecting pipe (transition piece) is installed at the upper end of the monopile to connect the windmill and the monopile (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When constructing the basic structure of offshore wind power generation facilities, since the upper end of the monopile is located near the sea surface, there is a risk that marine organisms will adhere to the upper end of the monopile during the period from driving the monopile to installing the transition piece. The present invention proposes an adhesion suppression member that suppresses the adhesion of marine organisms to the upper end of the monopile during the period from driving the monopile to installing the transition piece.

Means for Solving the Problems

[0005] In order to solve the above problems, the invention according to claim 1 is an adhesion suppression member for suppressing adhesion of marine organisms to the upper end portion of a pile driven into the seabed surface, and includes a main body portion that fits externally onto the upper end portion of the pile, a holding portion for placing on the upper end portion of the pile, and a conical reflecting portion fixed above the holding portion. , the main body portion includes a hollow substantially frustum-shaped opening for taking in sunlight into the main body portion from above, and a body portion that forms a gap between the pile and the main body portion, and irregularities are formed on the surface of the inner peripheral surface of the opening, or a silicone-based white paint is applied thereto. It is characterized by this. The invention according to claim 2 In addition to the configuration of claim 1, the invention is characterized in that unevenness is formed on the surface of the inner peripheral surface of the Barrel portion and the outer peripheral surface of the reflecting portion. The invention according to claim 3 In addition to the configuration of claim 1, the invention is characterized in that a silicone-based white paint is applied to the inner peripheral surface of the Barrel part of the On the surface portion. The invention according to claim 4 In addition to the configurations of claims 1 to 3, the invention is characterized in that an ultraviolet lamp is provided inside the main body portion For irradiating ultraviolet rays on the sea surface of the 。

Effect of the Invention

[0006] According to the adhesion suppression member of the present invention, it is possible to suppress the adhesion of marine organisms to the upper end portion of a pile driven into the seabed surface. In addition, since it is detachable from the upper end portion of the pile, it can be repeatedly used.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0008] Hereinafter, embodiments of the adhesion suppression member 100 according to the present invention will be described with reference to the drawings as appropriate. In the drawings shown below, the same or similar members are denoted by the same reference numerals, and redundant descriptions are omitted as appropriate. FIG. 1 is a schematic cross-sectional view of the adhesion suppression member 100 according to the embodiment of the present invention attached to the pile 10. Further, FIG. 2 is a schematic cross-sectional view showing the adhesion suppression member according to the embodiment of the present invention. (b) is a schematic cross-sectional view taken along line A-A of (a). Further, FIG. 3 is a schematic view showing the adhesion suppression member according to the second embodiment of the present invention. Further, FIG. 4 is a schematic cross-sectional view showing the adhesion suppression member according to the second embodiment of the present invention.

[0009] The adhesion suppression member 100 suppresses the adhesion of marine organisms by being attached to the upper end portion of the pile 10 of the offshore wind power generation facility. The pile 10 is a monopile foundation pile (monopile) driven into the seabed. For example, it is a large-diameter steel pipe pile or the like. The adhesion suppression member 100 is configured to cover the range where the adhesion of marine organisms to the pile 10 is to be suppressed (the upper end portion of the pile 10). In the present embodiment, the pile 10 is described as the adhesion suppression member 100 for steel materials attached to a steel pipe (pile 10) having a diameter of about 900 mm, but the diameter and material of the pile 10 are not limited thereto.

[0010] As shown in FIG. 1, the adhesion suppression member 100 is formed by a main body portion 1, a holding portion 2, and a reflecting portion 3. The shape of the adhesion suppression member 100 is preferably the shape of the connection portion of a transition piece (not shown in the figure) connected to the pile 10. The inner diameter of the transition piece as the foundation structure of the offshore wind power generation facility is formed to be about several tens of centimeters larger than the outer diameter of the pile 10. After the transition piece is coupled to the pile 10, the gap is filled with grout material.

[0011] The main body part 1 is composed of an opening part 11 and a barrel part 12. The main body part 1 is externally fitted to the upper end part of the pile 10. The opening part 11 is open at the upper part for taking in sunlight from above to the inside when the adhesion suppression member 100 is attached to the tip part of the pile 10, and is formed in a hollow substantially frustum - shaped cone that tapers in diameter from bottom to top. Note that the shape only needs to be open at the upper part, and for example, it may be a cylindrical shape. When the main body part 1 is attached to the pile 11, a gap part 4 is formed between the inner peripheral surface of the barrel part 12 and the outer peripheral surface of the pile 10. The shape and size of the inner peripheral surface of the barrel part 12 are formed to be approximately the same as those of the inner peripheral surface of the transition piece. Specifically, the inner diameter of the barrel part 12 is formed to be about several tens of centimeters larger than the outer diameter of the pile 10.

[0012] Figure 2(a) is a schematic cross - sectional view showing the adhesion suppression member according to an embodiment of the present invention. (b) is a schematic cross - sectional view taken along line A - A of (a). As shown in Figure 2(b), a plurality (4) of members are provided on the holding part 2 so as to protrude from the inner peripheral surface of the barrel part 12 toward the center. The holding part 2 is formed in a rod shape and is for supporting the reflection part 4 from below when the adhesion suppression member 100 is placed on the upper end part of the pile 10. In the embodiment, there are 4, but the shape and the number are not limited as long as the adhesion suppression member 100 can be attached to the upper end part of the pile 10. For example, it may be cross - shaped or lattice - shaped.

[0013] The reflection part 3 is formed in a conical shape and is for reflecting the sunlight taken into the inside of the main body part 1 from the opening of the opening part 11. It is fixed above the holding part 2, and a certain space is formed between the opening part 11 and the reflection part 3. Note that the shape of the reflection part 3 is not limited to a conical shape, and for example, it may be a semi - circular shape or a substantially triangular pyramid shape.

[0014] Next, the situation when the adhesion suppression member 100 is attached to the pile 10 will be described with reference to FIG. 1. When the pile 10 is driven into the seabed, the upper end portion of the pile 10 is located near the sea surface. As shown in FIG. 1, when the adhesion suppression member 100 is attached to the pile 10, a part of the body portion 12 is located below the sea surface, and seawater enters the gap portion 4. The adhesion suppression member 100 is used after driving the pile 10 into the seabed and before connecting a transition piece (not shown in the figure) to the pile 10. That is, the adhesion suppression member 100 used before connecting the transition piece (not shown in the figure) is detachable and not fixed to the pile 10 so that it can be reused with other piles 10.

[0015] As shown in FIG. 1, irregularities are formed on the surfaces of the inner peripheral surface of the opening 11 and the outer peripheral surface of the reflecting portion 2. By forming such irregularities, sunlight is likely to be reflected inside the opening 12. Further, irregularities may be formed on the surface of the inner peripheral surface of the body portion 12. In addition, a silicone-based white paint is applied to the inner peripheral surface of the main body portion 11 and the outer peripheral surface of the reflecting portion 2. Also, as shown in FIG. 4, an ultraviolet lamp 6 may be provided inside the main body portion 1 (inside the body portion 12) to irradiate the sea surface with ultraviolet rays to suppress the adhesion of marine organisms to the pile 10.

[0016] FIG. 3 is a schematic view showing an adhesion suppression member according to the second embodiment of the present invention. By circulating the seawater (seawater in the gap portion 4) between the inner peripheral surface of the adhesion suppression member 100 and the outer peripheral surface of the pile 10, the adhesion of marine organisms to the upper end portion of the pile 10 is suppressed. The upper and lower portions of the main body portion 1 are connected by a circulation hose 5, and the seawater in the upper portion is moved to the lower portion by a pump (not shown in the figure), so that the seawater between the inner peripheral surface of the adhesion suppression member 100 and the outer peripheral surface of the pile 10 is exchanged between the lower and upper portions. As shown in FIG. 4, the seawater in the upper portion of the gap portion 4 is discharged to the lower portion of the gap portion 4 through the circulation hose 5. When discharging the seawater to the lower portion of the gap portion 4, the seawater is discharged slightly obliquely upward as shown in FIG. 4.

[0017] As described above, the embodiments of the present invention have been explained. However, the present invention is not limited to the foregoing embodiments, and each of the above-described components can be appropriately changed without departing from the gist of the present invention. For example, in the present embodiment, the adhesion suppression member attached to the pile 10 of the offshore wind power generation facility has been described, but it may be used for piles such as piers, for example.

Explanation of Reference Numerals

[0018] 1 Main body 10 Pile 11 Opening 12 Barrel 2 Holding part 3 Reflecting part 4 Gap part 5 Circulation hose 6 Ultraviolet lamp

Claims

1. An adhesion suppression member for suppressing adhesion of marine organisms to the upper end portion of a pile driven into the seabed surface, comprising: a main body portion that fits externally onto the upper end portion of the pile; a holding portion for placing on the upper end portion of the pile; a conical reflecting portion fixed above the holding portion; the main body portion includes a hollow substantially frustum-shaped opening for taking in sunlight into the main body portion from above; a body portion that forms a gap between the pile and the main body portion; concavities and convexities are formed on the surface of the inner peripheral surface of the opening, or a silicone-based white paint is applied; An adhesion suppression member characterized by the above.

2. Concavities and convexities are formed on the surfaces of the inner peripheral surface of the body portion and the outer peripheral surface of the reflecting portion. The adhesion suppression member according to Claim 1, characterized by the above.

3. A silicone-based white paint is applied to the surface of the inner peripheral surface of the body portion. The adhesion suppression member according to Claim 1, characterized by the above.

4. An ultraviolet lamp for irradiating ultraviolet rays onto the sea surface is provided inside the main body portion. The adhesion suppression member according to Claims 1 to 3, characterized by the above.

Images