NL2033705A

NL2033705A - Offshore platform

Info

Publication number: NL2033705A
Application number: NL2033705A
Authority: NL
Inventors: Murata Kohei
Original assignee: Murata Yuatsukikai Co Ltd
Priority date: 2021-12-13
Filing date: 2022-12-09
Publication date: 2023-06-26
Also published as: JP7295581B1; NL2033705B1; JP2023089982A

Abstract

An offshore platform includes a base, a first clamp, a second clamp and a supporting column elevating device. The base can be divided into two along a mating surface, and includes a first support hole through which a supporting column of an offshore installation object is inserted, first-side and second-side bases. The first clamp is disposed on the base and around the first support hole, and includes first-side and second-side first clamps to be divided into two along the mating surface. The second clamp is disposed above the first clamp to be divided into two along the mating surface. The second clamp includes a second support hole, first-side and second-side second clamps. The supporting column elevating device supports the second clamp so as to be elevated. By combining clamping/unclamping of the first clamp and clamping/unclamping of the second clamp, clamping/unclamping and elevating of the supporting column are performed.

Description

OFFSHORE PLATFORM

BACKGROUND TECHNICAL FIELD

[0001]

The present invention relates to an offshore platform.

RELATED ART

[0002]

For example, JP 2004-001750 A discloses that a self-elevating platform (SEP: hereinafter, simply referred to as "offshore platform”) is used when a wind power generation facility is installed on the sea.

[0003]

Conventionally, by using a heavy machine such as a large crane mounted on an offshore platform, various operations such as installation of a supporting column and assembly of a wind power generation facility are performed at an installation place on the sea.

SUMMARY

[0004]

The work on the sea is dangerous, is easily affected by the weather, and requires a heavy machine such as a large crane, so that there are problems that a highly skilled technique is required and the cost is increased.

[0005]

Thus, an object of the present invention is to provide an offshore platform that transports and installs an offshore installation object, which can simplify work on the sea and reduce cost.

[0006]

In order to solve the above problems, an offshore platform according to one aspect of the present invention includes: a base configured to be divided into two along a mating surface, the base including a first support hole through which a supporting column of an offshore installation object is inserted, a first-side base, and a second-side base; a first clamp disposed on the base and around the first support hole, the first clamp including a first-side first clamp and a second-side first clamp that are configured to be divided into two along the mating surface; a second clamp disposed above the first clamp. the second clamp configured to be divided into two along the mating surface, the second clamp including a second support hole, a first-side second clamp, and a second-side second clamp; and a supporting column elevating device configured to support the second clamp so as to be elevated. By combining clamping and unclamping in the first clamp and clamping and unclamping in the second clamp, clamping and unclamping of the supporting column and elevating of the supporting column are performed.

[0007]

According to the present invention, since the offshore installation object is transported, and the offshore installation object is installed by elevating the supporting column, the work on the sea can be simplified and the cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS

[0608]

Fig. 1 is a schematic side view of the offshore platform in a state where an offshore installation object is mounted on a base according to one preferred embodiment;

Fig. 2 is a schematic side view of the base in the offshore platform shown in Fig. 1;

Fig. 3 is a schematic side view illustrating installation of the offshore installation object by the offshore platform shown in Fig. 1;

Fig. 41s a plan view showing a state in which the base of the offshore platform is closed;

Fig. 5 is a plan view showing a state in which the base of the offshore platform is opened;

Fig. 6 is a side view showing the hinge leg elevating device and the hinge in a state where the base of the offshore platform is closed:

Fig. 7 is a side view illustrating the hinge leg elevating device and the hinge in a state where the base of the offshore platform is opened;

Fig. 8 is a schematic cross-sectional view illustrating the hinge leg elevating device;

Fig. 9 is a plan view showing the hinge in a state where the base of the offshore platform is closed;

Fig. 10 is a plan view showing the hinge in a state where the base of the offshore platform is opened;

Fig. 11 is a schematic side view illustrating the supporting column elevating device;

Fig. 12 is a side view illustrating the second drive cylinder in an extended state in the supporting column elevating device shown in Fig. 11;

Fig. 13 is a side view illustrating the second drive cylinder in a shortened state in the supporting column elevating device shown in Fig. 11;

Fig. 14 is a plan view illustrating the first clamp in the supporting column elevating device shown in Fig. 11;

Fig. 15 is a plan view illustrating the second clamp in the supporting column elevating device shown in Fig. 11;

Fig. 16 is a plan view illustrating the supporting column clamping device in the first clamp shown in Fig. 14 and the second clamp shown in Fig. 15;

Fig. 17 is a plan view illustrating a disengaged state of the base lock device in the offshore platform shown in Fig. 5; and

Fig. 18 is a plan view illustrating an engaged state of the base lock device in the offshore platform shown in Fig. 4.

EMBODIMENT(S) FOR CARRYING OUT THE INVENTION

[0009]

Hereinafter, a preferred embodiment of an offshore platform 1 according to the present invention will be described with reference to the drawings.

[0010] [Overall structure}

With reference to Figs. 1 to 5. an overall structure of an offshore platform 1 will be described. Fig. 1 is a schematic side view of the offshore platform 1 in a state where an offshore installation object 2 is mounted on a base 10 according to one preferred embodiment. Fig. 2isa schematic side view of the base 10 in the offshore platform 1 shown in Fig. 1. Fig. 3isa schematic side view illustrating installation of the offshore installation object 2 by the offshore platform 1 shown in Fig. 1. Fig. 4 is a plan view showing a state in which the base 10 of the offshore platform 1 is closed. Fig. 5 is a plan view showing a state in which the base 10 of the offshore platform 1 is opened.

[0011]

The offshore platform 1 is a self-elevating platform (SEP) including a base 10, a plurality of legs 14, and a hinge leg 34. The base 10 serves as an offshore structure temporarily installed on the ocean for work. The leg 14 serves as a supporting column and has a rectangular cross section.

The hinge leg 34 serves as a hinge column and has a circular cross section. The offshore platform 1 has a function of loading an offshore installation object 2 assembled in advance by a harbor facility such as a crane, carrying the offshore installation object 2 on the sea, and installing the offshore installation object 2 on the seabed B.

[0012]

In Figs. 1 and 3, an offshore installation object 2 is a structure installed on the ocean for a long period of time, and is, for example, an offshore wind power generation facility 2 fixed and installed on the seabed B. The offshore wind power generation facility 2 is a tower-type structure including a supporting column 21, a plurality of blades 25, and a nacelle 26. The supporting column 21 includes a foundation support portion 23 to land on the seabed B, a flange portion 24 to be disposed at a central portion in a longitudinal direction of the supporting column 21, and a clamped portion 22 to be formed between an upper boundary of the foundation support portion 23 and the flange portion 24. The plurality of blades 25 are attached to a nacelle 26 provided at the upper end portion of the supporting column 21. A plurality of burial recessed portions for burying the foundation support portion 23 of the supporting column 21 in the seabed B are formed in advance in the seabed B at the installation location. The offshore wind power generation facility 2 is fixedly installed on the seabed B using the supporting column 21 serving as a pile foundation.

In the offshore wind power generation facility 2, for example, the height of the supporting column 21 is 240 m, and the diameter of the blade 25 is 225 m.

[0013]

The offshore platform 1 mounted with the previously-assembled offshore installation object 2 is towed to the installation location. Then, at the installation location, the leg 14 is relatively moved downward with respect to the base 10 by a leg elevating device (not shown).

The leg 14 is made of a hollow square-shaped (substantially square in cross section, for example) steel pipe.

[0014]

When the leg tip of the leg 14 is pushed and buried into the seabed B, a reaction force from the seabed B can be obtained, and the base 10 can be moved above the sea level A by the reaction force. The base 10 is raised to a height not affected by ocean waves (for example, about 10m). In this state, the self-elevating base 10 is installed on the sea. By disposing the self- elevating base 10 at a position higher than the sea level A, the base 10 is less likely to be affected by waves or the like and is less likely to be rocked, so that the work required for installing the offshore installation object 2 is stabilized. Similarly to the leg 14, the hinge leg 34 is also pushed and buried into the seabed B. The offshore platform 1 is temporarily installed on the seabed B using a hinge leg 34 and a plurality of legs 14, serving as pile foundations.

[0015]

As shown in Figs. 2 and 4, the base 10 has a substantially rectangular parallelepiped shape with a low height, has a substantially rectangular shape extending in the longitudinal direction and the lateral direction when viewed from above, and includes an upper plate, a bottom plate, a side plate, and a partition plate. A first support hole 15 is formed at the center in the longitudinal direction and the center in the lateral direction of the base 10. The first support hole 15 is a through hole penetrating in the height direction (vertical direction) of the base 10. The diameter of the first support hole 15 is dimensioned and configured so that the supporting column 21 can be inserted. As shown in Fig. 5, the first support hole 15 is divided into two along the mating surface 13. The mating surface 13 linearly extends along the lateral direction of the base at the center in the longitudinal direction of the base 10. The base 10 is, for example, 140 m long x 100 m wide x 10 m high.

[0016]

As shown in Fig. 4, leg holes penetrating in the height direction (vertical direction) of the 5 base 10 are formed, for example, at four corners of the base 10 and two places on the opposite side of the hinge leg 34. The leg hole is, for example, square-shaped so that the square-shaped leg 14 can be inserted through the leg hole in the vertical direction. The leg elevating device is attached to the base 10 so as to surround the leg hole. An internal space surrounded by the upper plate, the bottom plate, and the side plate is partitioned by a plurality of partition plates and has a watertight 10 structure.

[0017]

The base 10 has a first-side base 11 and a second-side base 12 obtained by dividing the base 10 into two in the longitudinal direction. The hinge leg 34 is disposed outside the mating surface 13. The first-side base 11 and the second-side base 12 are divided along the mating surface 13 by pivoting around the hinge leg 34.

[0018]

When the seventh drive cylinder 16 is extended as shown in Fig. 5 in a state where the leg 14 is pulled up from the seabed B while the hinge leg 34 is buried in the seabed B, the first-side base 11 and the second-side base 12 are opened and divided in a V shape in a plan view by pivoting around the hinge leg 34. Accordingly, the base 10 can be easily divided into two parts of the first-side base 11 and the second-side base 12. In addition, when the seventh drive cylinder 16 is shortened, the first-side base 11 and the second-side base 12 pivot in the closing direction around the hinge leg 34, and the first-side base 11 and the second-side base 12 are united.

[0619]

Since the internal spaces of the first-side base 11 and the second-side base 12 have watertight structures, the first-side base 11 and the second-side base 12 can obtain buoyancy, and the entire offshore platform 1 can float on water. Therefore, by pulling up the leg 14 and the hinge leg 34 from the seabed B and setting the offshore platform 1 to a state of floating above the sea level A, the offshore platform 1 can be towed and moved to a predetermined place. In addition, by including a propulsion device such as a screw propeller, the offshore platform 1 may be in a mode of being self-propelled and moving to a predetermined place.

[0020] [Base lock device]

With reference to Figs. 4, 17, and 18, the base lock device 80 of the offshore platform 1 will be described. Fig. 17 is a plan view illustrating a disengaged state of the base lock device 80 in the offshore platform 1 shown in Fig. 5. Fig. 18 is a plan view illustrating an engaged state of the base lock device 80 in the offshore platform 1 shown in Fig. 4.

[0621]

As shown in Fig. 4, the plurality of base lock devices 80 are disposed along the mating surface 13 and so as to intersect the mating surface 13. The base lock device 80 couples and fixedly locks the first-side base 11 and the second-side base 12.

[0022]

As shown in Figs. 17 and 18, the base lock device 80 includes, for example, a coupling advancing/retracting portion 81 and a base lock portion 80a disposed in the first-side base 11, and a base locked portion 80b disposed in the second-side base 12. The base lock device 80 includes one coupling advancing/retracting portion 81 and a pair of base lock portions 80a and 80a.

[0023]

The coupling advancing/retracting portion 81 includes a third drive cylinder 82 and a coupling protrusion 83 moved in a retractable manner by the third drive cylinder 82. The base lock portion 80a includes a base lock piece 84 having a substantially L shape. The base lock piece 84 includes a coupling receiving portion 84a positioned on the base portion side, a coupling protruding portion 84b positioned on the tip side, and a base lock shaft 85 positioned between the coupling receiving portion 84a and the coupling protruding portion 84b. When a pair of coupling receiving portions 84a and 84a is opened, a coupling space 88 is formed.

[0024]

The base locked portion 80b includes a coupled projecting portion 89 in which the coupling recessed portion 89b is formed.

[0025]

By pivoting the pair of base lock pieces 84 and 84 around the base lock shaft 85 by the extension of the fourth drive cylinder 86, the coupling protruding portion 84b is engaged with the coupling recessed portion 89b. Thereafter, the coupling protrusion 83 is inserted into the coupling space 88 by extension of the third drive cylinder 82. As a result, as shown in Fig. 18, the first-side base 11 and the second-side base 12 are coupled and fixedly locked.

[0026]

The coupling protrusion 83 is pulled out from the coupling space 88 by shortening the third drive cylinder 82, and the pair of base lock pieces 84 and 84 is pivoted in opposite directions around the base lock shaft 85 by shortening the fourth drive cylinder 86. As a result, as shown in

Fig. 17, the engagement of the coupling protruding portion 84b with the coupling recessed portion 89b is released, and the fixedly locking of the first-side base 11 and the second-side base 12 is released. Accordingly, it is possible to easily switch between fixedly locking and lock release between the first-side base 11 and the second-side base 12.

[0627]

The third drive cylinder 82 and the fourth drive cylinder 86 are driven by hydraulic pressure such as oil-hydraulic pressure. Accordingly, since the hydraulic circuit can be shared with other drive cylinders (first drive cylinder 76, second drive cylinder 60, fifth drive cylinder 42, sixth drive cylinder 44, and seventh drive cylinder 16), the cost can be reduced.

[0028] [Hinge leg elevating device]

With reference to Figs. 6 to 10, the hinge leg elevating device 30 of the offshore platform 1 will be described. Fig. 6 is a side view showing the hinge leg elevating device 30 and the hinge 31 in a state where the base 10 of the offshore platform 1 is closed. Fig. 7 is a side view illustrating the hinge leg elevating device 30 and the hinge 31 in a state where the base 10 of the offshore platform 1 is opened. Fig. 8 is a schematic cross-sectional view illustrating the hinge leg elevating device 30. Fig. 9 is a plan view showing the hinge 31 in a state where the base 10 of the offshore platform lis closed. Fig. 10 is a plan view showing the hinge in a state where the base 10 of the offshore platform 1 is opened.

[0029]

As shown in Fig. 8, the hinge leg 34 is a hollow cylindrical (circular in cross section, for example) steel pipe. The hinge leg 34 has an engagement surface on each of two facing surfaces.

A plurality of tapered engagement recessed portions 35 are formed in the longitudinal direction of the hinge leg 34 at each of the centers in the width direction of the two engagement surfaces. The engagement recessed portion 35 has a bottomed shape that does not penetrate in the longitudinal orthogonal direction (lateral direction) of the hinge leg 34. Preferably, a plurality of engagement recessed portions 35 are formed continuously in the longitudinal direction of the hinge leg 34.

According to this configuration, since the hinge leg 34 can be relatively moved in the vertical direction by a minute amount, minute positioning can be executed. The engagement recessed portion 35 has a truncated cone shape tapered toward the inside of the hinge leg 34.

[0030]

The hinge leg elevating device 30 includes a fifth drive cylinder 42 that acts as a hinge leg elevating cylinder and a sixth drive cylinder 44 that acts as a hinge leg lock cylinder. The upper sixth drive cylinder 44 is attached to the movable table 41 through a bracket, and is movable in the longitudinal direction (vertical direction) of the hinge leg 34 by the fifth drive cylinder 42.

The fifth drive cylinder 42 is driven by hydraulic pressure such as oil-hydraulic pressure. The lower sixth drive cylinder 44 is attached to the fixed base 43 through a bracket and is immovable in the longitudinal direction (vertical direction) of the hinge leg 34. The fixed base 43 is fixed to the base 10.

[0031]

In order to fixedly lock the hinge leg 34, the upper sixth drive cylinder 44 and the lower sixth drive cylinder 44 are disposed to face the respective engagement surfaces. A hinge leg engagement portion 45 is provided at the tip of the sixth drive cylinder 44. The hinge leg engagement portion 45 has a substantially conical tapered shape. That is, the hinge leg engagement portion 45 has a truncated cone shape tapered toward the engagement recessed portion 35. The sixth drive cylinder 44 is driven by hydraulic pressure such as oil-hydraulic pressure.

The sixth drive cylinder 44 drives the hinge leg engagement portion 45 in the horizontal direction (lateral direction). When the hinge leg engagement portion 45 is moved toward the engagement recessed portion 35 formed in the hinge leg 34 by the extension of the sixth drive cylinder 44, the hinge leg engagement portion 45 is engaged with the engagement recessed portion 35 to fixedly lock the hinge leg 34. When the hinge leg engagement portion 45 is moved to the opposite side from the engagement recessed portion 35 by the shortening of the sixth drive cylinder 44, the hinge leg engagement portion 45 is retracted and disengaged from the engagement recessed portion 35, and the fixedly locking of the hinge leg 34 is released.

[0032] {Hinge}

With reference to Figs. 6, 7, 9, and 10, the hinge 31 of the offshore platform 1 will be described.

[0033]

As shown in Figs. 9 and 10, the hinge 31 includes a first-side hinge 31a connected to the side end portion in the longitudinal direction of the first-side base 11 and a second-side hinge 31b connected to the side end portion in the longitudinal direction of the second-side base 12. The hinge leg 34 having a circular cross section is inserted into a cylindrical hinge through hole formed in the first-side hinge 31a and the second-side hinge 31b. Accordingly, the first-side hinge 31a and the second-side hinge 31b pivot around the hinge leg 34.

[0034]

As shown in Figs. 9 and 10, the first-side hinge 31a and the second-side hinge 31b have a plurality of hinge pieces arranged alternately, and are pivotably supported through a lubricating member 32 arranged in a gap between the hinge pieces. The lubricating member 32 is made of, for example, reinforced plastic having lubricity and abrasion resistance, such as MC nylon (MC 901) manufactured by Mitsubishi Plastics, Inc. Accordingly, the first-side base 11 and the second- side base 12 to which a large load is applied can smoothly pivot around the hinge leg 34.

[0035] [Hinge leg elevating device]

With reference to Figs. 11 to 16, the supporting column elevating device 50 of the offshore platform 1 will be described. Fig. 11 is a schematic side view illustrating the supporting column elevating device 50. Fig. 12 is a side view illustrating the second drive cylinder 60 in an extended state in the supporting column elevating device 50 shown in Fig. 11. Fig. 13 is a side view illustrating the second drive cylinder 60 in a shortened state in the supporting column elevating device 50 shown in Fig. 11. Fig. 14 is a plan view illustrating the first clamp 51 in the supporting column elevating device 50 shown in Fig. 11. Fig. 15 is a plan view illustrating the second clamp 55 in the supporting column elevating device 50 shown in Fig. 11. Fig. 16 is a plan view illustrating the supporting column clamping device 70 in the first clamp 51 shown in Fig. 14 and the second clamp 55 shown in Fig. 15.

[0036]

As shown in Fig. 11, the supporting column elevating device 50 includes a first clamp 51, a second clamp 55, and a second drive cylinder 60, and supports the second clamp 55 so as to be elevated by the second drive cylinder 60.

[0037]

As shown in Fig. 14, the first clamp 51 includes a first support hole 15, a first-side first clamp Sla, a second-side first clamp 51b, and twe supporting column clamping devices 70. The first clamp 51 is fixedly installed on the base 10, and is divided into two parts of the first-side first clamp 51a and the second-side first clamp 51b along the mating surface 13. The first-side first clamp Sla is fixedly installed on the first-side base 11, and the second-side first clamp 51b is fixedly installed on the second-side base 12. The first-side first clamp 51a and the second-side first clamp 51b are disposed around the first support hole 15. A plurality of (for example, four) first receiving recessed portions 52 are formed in each of the first-side first clamp 51a and the second-side first clamp 51b.

[0038]

The first-side first clamp 51a and the second-side first clamp 51b each have a first split hole. The first split hole is a semicircular hole formed by splitting the first support hole 15 along the mating surface 13 in a plan view. As shown in Fig. 11, the split slide metal 17 is attached to the split hole. The first gap 53 dividing the first clamp 51 into two overlaps the mating surface 13 in a plan view. The two supporting column clamping devices 70 are disposed at opposing positions across the first support hole 15. The first-side first clamp 51a and the second-side first clamp 51b clamp the side surface of the supporting column 21 to be inserted into the first support hole 15 by the supporting column clamping device 70. For example, the first clamp 51a and the second-side first clamp 51b clamp the side surface of the supporting column 21 with interposition of the slide metal 17. Details of the supporting column clamping device 70 will be described below.

[0039]

As shown in Fig. 15, the second clamp 55 includes a first-side second clamp 55a. a second-side second clamp 55b, a second support hole 59, and two supporting column clamping devices 70. The second clamp 55 is divided into two parts of the first-side second clamp 55a and the second-side second clamp 55b along the mating surface 13. The second support hole 59 is also divided into two along the mating surface 13. The first-side second clamp 55a corresponds to

IO the first-side first clamp 51a and is positioned immediately above the first-side first clamp 51a.

The second-side second clamp 55b corresponds to the second-side first clamp 51b and is positioned immediately above the second-side first clamp 51b. A plurality of (for example. four) second receiving recessed portions 56 are formed in each of the first-side second clamp 55a and the second-side second clamp 55b.

[0040]

The first-side second clamp 55a and the second-side second clamp 55b each have a support flange 57 at an inner lower portion thereof. The support flange 57 protrudes radially inward and supports a lower portion of the flange portion 24. Accordingly, the supporting column 21 can be easily and reliably supported. Together therewith, the side surface of the support flange 57 clamps the side surface of the supporting column 21. The second support hole 59 is positioned immediately above the first support hole 15, and is configured so that the supporting column 21 can be inserted therethrough. The first-side second clamp 55a and the second-side second clamp 55b each have a second split hole. The second split hole is a semicircular hole obtained by splitting the second support hole 59 along the mating surface 13 in a plan view. The second gap 58 dividing the second clamp 55 into two overlaps the mating surface 13 in a plan view. The two supporting column clamping devices 70 are disposed at opposing positions across the second support hole 59. The first-side second clamp 55a and the second-side second clamp 55b clamp the supporting column 21 to be inserted into the second support hole 59 by the supporting column clamping device 70.

[0041]

As shown in Fig. 11, the second drive cylinder 60 is disposed between the first clamp 51 and the second clamp 55, and specifically, is disposed between the first receiving recessed portion 52 of the first clamp 51 and the second receiving recessed portion 56 of the second clamp 55. In the supporting column elevating device 50, a plurality of (for example, eight) second drive cylinders 60 are evenly disposed along the circumferential direction.

[0042]

As shown in Fig. 12, the second drive cylinder 60 is a multi-stage telescope-type drive cylinder, and includes an upper cylinder 61, a lower cylinder 62, and a hydraulic port 63. An upper cylinder 61 having a plurality of stages (for example, 7 stages) is disposed above the hydraulic port 63, and a lower cylinder 62 having a plurality of stages (for example, 7 stages) is disposed below the hydraulic port 63.

[0043]

The second drive cylinder 60 is driven by hydraulic pressure such as oil-hydraulic pressure. Accordingly, a large stretching force can be obtained by the hydraulic pressure of the second drive cylinder 60, so that the offshore wind power generation facility 2 being a heavy load can be easily lifted. When hydraulic pressure (for example, oil-hydraulic pressure) is supplied to the hydraulic port 63, the upper cylinder 61 extends upward and the lower cylinder 62 extends downward, whereby the second drive cylinder 60 is in a long extending state. The long second drive cylinder 60 raises the supporting column 21 supported by the second clamp 55 high (for example, to a height of 100 m).

[0044]

As shown in Fig. 13, when the hydraulic pressure (for example, oil-hydraulic pressure) is removed from the hydraulic port 63, both the upper cylinder 61 and the lower cylinder 62 are shortened, and the second drive cylinder 60 is in a shortened state (for example, to a height of 10 m). The shortened second drive cylinder 60 lowers the second clamp 55, that is, the supporting column 21. Accordingly, a long stroke can be obtained even with a short cylinder, so that the supporting column 21 supported by the second clamp 55 can be lifted high.

[0045]

As shown in Fig. 16, the supporting column clamping device 70 includes a supporting column lock portion 71a and a supporting column locked portion 71b. For example, the supporting column lock portion 714 is provided in each of the first-side first clamp 51a and the first-side second clamp 55a. Then, the supporting column locked portion 71b is fixedly installed on the second-side first clamp 51b and the second-side second clamp 55b, and has, for example, a rectangular cross section.

[0046]

The supporting column lock portion 71a includes an engagement switching portion 73, a supporting column engagement portion 75, and a first drive cylinder 76.

[0047]

The engagement switching portion 73 includes a guide portion 72, a swing shaft 74, and a pivoting portion 77, and switches the engagement/disengagement of the supporting column engagement portion 75 with respect to the supporting column locked portion 71b. ‘The guide portion 72 is fixedly installed on the first-side first clamp 51a and the first-side second clamp 55a, and has, for example, a J-shaped cross section. The guide portion 72 has a flat portion 72a extending flat, and a curved portion 72b extending in an upward curved manner following the flat portion 72a. The swing shaft 74 swingably couples the supporting column engagement portion 75 to the rod 76a of the first drive cylinder 76. The pivoting portion 77 is provided at the base portion of the supporting column engagement portion 75 and has a pivoting shaft 77a positioned below the swing shaft 74. The pivoting portion 77 is, for example, a roller.

[0048]

The supporting column engagement portion 75 has an inverted U shape, and includes a tip engagement portion 75a positioned on the tip side, and a swing shaft 74 and a pivoting shaft 77a positioned on the base portion side. The tip engagement portion 75a is configured to be engageable with the supporting column locked portion 71b by the supporting column engagement portion 75 pivoting around the swing shaft 74. The first drive cylinder 76 is driven by hydraulic pressure such as oil-hydraulic pressure, and drives the supporting column engagement portion 75.

The engagement detection sensors 79 are disposed above and below the supporting column engagement portion 75.

[0049]

When the rod 76a of the first drive cylinder 76 advances toward the supporting column locked portion 71b, the pivoting portion 77 moves from the flat portion 72a to the curved portion 72b, and the tip engagement portion 75a of the supporting column engagement portion 75 pivots upward, so that the engagement of the supporting column engagement portion 75 with the supporting column locked portion 71b is released. At this time, disengagement is detected by the upper engagement detection sensor 79. By releasing the engagement of the supporting column engagement portion 75 with the supporting column locked portion 71b, the clamping of the supporting column 21 by each of the first clamp 51 and the second clamp 55 is released.

Accordingly, it is possible to easily switch between engagement and disengagement of the supporting column engagement portion 75 with the supporting column locked portion 71b.

[0050]

In addition, when the rod 76a of the first drive cylinder 76 retreats from the supporting column locked portion 71b, the pivoting portion 77 moves from the curved portion 72b to the flat portion 72a, and the tip engagement portion 75a of the supporting column engagement portion 75 pivots downward, so that the engagement of the supporting column engagement portion 75 with the supporting column locked portion 71b is performed. At this time, the engagement is detected by the lower engagement detection sensor 79. Then, as the rod 76a further retreats, the second-

side first clamp 51b and the second-side second clamp 55b are respectively pulled toward the first- side first clamp Sla and the first-side second clamp 55a, so that each of the first clamp 51 and the second clamp 55 clamps the supporting column 21. Accordingly, since a large clamping force can be obtained by the hydraulic pressure of the first drive cylinder 76, the first clamp 51 and the

S second clamp 55 can firmly clamp the supporting column 21.

[0051] [States of offshore platform]

By combining clamping and unclamping in the first clamp 51 and clamping and unclamping in the second clamp 55, the offshore platform 1 can perform clamping and unclamping 19 of the supporting column 21 and elevating of the supporting column 21.

[0052]

In a first state, the first clamp 51 and the second clamp 55 clamp the supporting column 21 lifted by the supporting column elevating device 50 and positioned at the upper position. By maintaining the first state, the landing type offshore wind power generation facility 2 in which the blades 25 and the nacelle 26 are assembled in advance into the supporting column 21 can be easily and reliably transported on the sea from a harbor or the like to an installation location on the sea.

[0053]

In a second state, the second clamp 55 clamps the supporting column 21 and the first clamp 51 unclamps the supperting column 21, and the supporting column elevating device 50 lowers the second clamp 55 (that is, the supporting column 21). By maintaining the second state, it is possible to easily install the offshore wind power generation facility 2 assembled in advance at the installation location on the sea. It should be noted that in the installation of the offshore wind power generation facility 2, work of forming on the seabed B a burial recessed portion for burying the foundation support portion 23 of the supporting column 21 and work of finely elevating the leg 14 and the hinge leg 34 so as to accurately position the supporting column 21 in the burial recessed portion on the seabed B are performed.

[0654]

In a third state, the supporting column 21 is unclamped by the second clamp 55. By maintaining the third state, the offshore wind power generation facility 2 installed on the sea can be easily separated from the offshore platform 1.

[0055]

In a fourth state, the base 10 is divided into two parts of the first-side base 11 and the second-side base 12 after the third state. By maintaining the fourth state, the offshore platform 1 can easily move without interfering with the offshore wind power generation facility 2.

[0056]

In a fifth state, the first-side base 11 and the second-side base 12 are united after the fourth state. By maintaining the fifth state, the offshore platform 1 that has completed the installation of the offshore wind power generation facility 2 can move on the sea.

[0057]

The specific preferred embodiment of the present invention has been described, but the present invention is not limited to the above-described preferred embodiment, and various modifications can be made and implemented within the scope of the present invention.

[0058]

The number of stages of the second drive cylinder 60 is appropriately determined according to the height of the supporting column 21 of the offshore wind power generation facility 2 and the height to which the supporting column 21 is lifted.

[0059]

The offshore platform 1 preferably has a mode of transporting and installing the landing type offshore wind power generation facility 2 in which the blades 25 and the nacelle 26 are installed in advance on the supporting column 21 to an installation location on the sea.

Accordingly, since the assembly work at the installation location on the sea is unnecessary, the risk is reduced, it is less likely to be affected by the weather, and a heavy machine such as a large crane isunnecessary. However, the present invention is also applicable to a mode in which the offshore platform 1 transports the supporting column 21 and installs the blades 25 and the nacelle 26 at the installation location on the sea, and a mode in which the offshore platform 1 transports an intermediate product obtained by assembling in advance the nacelle 26 into the supporting column 21 to the installation location on the sea and attaches the blades 25 at the installation location on the sea.

[0060]

The present invention and the preferred embodiments are summarized as follows.

[0061]

An offshore platform 1 according to one aspect of the present invention includes: a base 10 configured to be divided into two along a mating surface 13, the base 10 including a first support hole 15 through which a supporting column 21 of an offshore installation object 2 is inserted, a first-side base 11, and a second-side base 12; a first clamp 51 disposed on the base 10 and around the first support hole 15, the first clamp 51 including a first-side first clamp Sla and a second-side first clamp 51b that are configured to be divided into two along the mating surface 13; a second clamp 55 disposed above the first clamp 51, the second clamp 55 configured to be divided into two along the mating surface 13, the second clamp 55 including a second support hole 59, a first-side second clamp 55a, and a second-side second clamp 55b; and a supporting column elevating device 50 configured to support the second clamp 55 so as to be elevated. By combining clamping and unclamping in the first clamp 51 and clamping and unclamping in the second clamp 55, clamping and unclamping of the supporting column 21 and elevating of the supporting column 21 are performed.

[0062]

According to the above configuration, since the offshore installation object 2 is transported, and the offshore installation object 2 is installed by elevating the supporting column 21, the work on the sea can be simplified and the cost can be reduced.

[0063]

In addition, in the offshore platform 1 of one preferred embodiment, by pivoting around a hinge leg 34 to be provided outside the mating surface 13, the first-side base 11 and the second- side base 12 are divided by being opened in a V shape in a plan view.

[0064]

According to the above preferred embodiment, the base 10 can be easily divided into two parts of the first-side base 11 and the second-side base 12.

[0065]

In addition, in the offshore platform 1 of one preferred embodiment, the supporting column 21 includes a flange portion 24 at a central portion in a longitudinal direction of the supporting column 21. The second clamp 55 supports the flange portion 24.

[0066]

According to the above preferred embodiment, the supporting column 21 can be easily and reliably supported.

[0067]

In addition, in the offshore platform 1 of one preferred embodiment, the offshore installation object 2 is transported by clamping the supporting column 21 in an upper position with the first clamp 51 and the second clamp 55.

[0068]

According to the above preferred embodiment, the offshore wind power generation facility 2 can be easily and reliably transported on the sea from a harbor or the like to an installation location on the sea.

[0069]

In addition, in the offshore platform 1 of one preferred embodiment, the offshore installation object 2 is installed on a sea by clamping the supporting column 21 by the second clamp 55, unclamping the supporting column 21 by the first clamp 51, and lowering the second clamp 55 by the supporting column elevating device 50.

[0070]

According to the above preferred embodiment, the offshore wind power generation facility 2 can be easily installed at an installation location on the sea.

[0071]

In addition, in the offshore platform 1 of one preferred embodiment, the offshore installation object 2 is separated from the offshore platform 1 by unclamping the supporting column 21 by the second clamp 55.

[0072]

According to the above preferred embodiment, the offshore wind power generation facility 2 installed on the sea can be easily separated from the offshore platform 1.

[0073]

In addition, in the offshore platform 1 of one preferred embodiment, the offshore platform 1 moves away from the offshore installation object 2 by dividing the base 10 into the first-side base 11 and the second-side base 12 after the offshore installation object 2 is installed on asea.

[0074]

According to the above preferred embodiment, the offshore platform 1 can easily move without interfering with the offshore wind power generation facility 2.

[0075]

In addition, in the offshore platform 1 of one preferred embodiment, the offshore platform 1 moves on a sea by uniting the first-side base 11 and the second-side base 12.

[0076]

According to the above preferred embodiment, the offshore platform 1 that has completed the installation of the offshore wind power generation facility 2 can move on the sea.

[0077]

In addition, in the offshore platform 1 of one preferred embodiment, each of the first clamp 51 and the second clamp 55 includes a supporting column clamping device 70 having a supporting column lock portion 71a and a supporting column locked portion 71b. The supporting column lock portion 71a includes a supporting column engagement portion 75 configured to be engaged with a supporting column locked portion 71b, an engagement switching portion 73 configured to switch between engagement and disengagement of the supporting column engagement portion 75 with the supporting column locked portion 71b, and a first drive cylinder 76 configured to drive the supporting column engagement portion 75. By engagement of the supporting column engagement portion 75 with the supporting column locked portion 71b, clamping of the supporting column 21 by each of the first clamp 51 and the second clamp 55 is performed. By releasing engagement of the supporting column engagement portion 75 with the supporting column locked portion 71b, release of clamping of the supporting column 21 by each of the first clamp 51 and the second clamp 55 is performed.

[0078]

According to the above preferred embodiment, it is possible to easily switch between engagement and disengagement of the supporting column engagement portion 75 with the supporting column locked portion 71b.

[0079]

In addition, in the offshore platform 1 of one preferred embodiment, the engagement switching portion 73 includes: a swing shaft 74 configured to swingably couple the supporting column engagement portion 75 with a rod 76a of the first drive cylinder 76, a pivoting portion 77 provided at a base portion of the supporting column engagement portion 75, the pivoting portion 77 including a pivoting shaft 77a positioned below the swing shaft 74, and a guide portion 72 having a flat portion 72a extending in a flat manner and a curved portion 72b extending in an upward curved manner following the flat portion 72a. When the rod 76a of the first drive cylinder 76 advances toward the supporting column locked portion 71b, engagement of the supporting column engagement portion 75 with the supporting column locked portion 71b is released by a tip engagement portion 75a of the supporting column engagement portion 75 being pivoted upward.

When the rod 76a of the first drive cylinder 76 retreats from the supporting column locked portion 71b, engagement of the supporting column engagement portion 75 with the supporting column locked portion 71b is performed by a tip engagement portion 75a of the supporting column engagement portion 75 being pivoted downward.

[0080]

[0081]

In addition, in the offshore platform 1 of one preferred embodiment, the first drive cylinder 76 is driven by hydraulic pressure.

[0082]

According to the above preferred embodiment, since a large clamping force can be obtained by the hydraulic pressure of the first drive cylinder 76, the first clamp 51 and the second clamp 55 can firmly clamp the supporting column 21.

[0083]

In addition, in the offshore platform 1 of one preferred embodiment, the supporting column elevating device 50 includes a multi-stage telescope-type second drive cylinder 60.

[0084]

According to the above preferred embodiment, a long stroke can be obtained even with a short cylinder, so that the supporting column 21 supported by the second clamp 55 can be lifted high.

[0085]

In addition, in the offshore platform 1 of one preferred embodiment, the second drive cylinder 60 includes an upper cylinder 61 that expands and contracts upward in multiple stages and alower cylinder 62 that expands and contracts downward in multiple stages.

[0086]

According to the above preferred embodiment, a longer stroke can be obtained even with a short cylinder, so that the supporting column 21 supported by the second clamp 55 can be lifted higher.

[0087]

In addition, in the offshore platform 1 of one preferred embodiment, the second drive cylinder 60 is driven by hydraulic pressure.

[0088]

According to the above preferred embodiment, a large stretching force can be obtained by the hydraulic pressure of the second drive cylinder 60, so that the offshore wind power generation facility 2 being a heavy load can be easily lifted.

[0089]

In addition, in the offshore platform 1 of one preferred embodiment, a base lock device 80 configured to fixedly lock the first-side base 11 and the second-side base 12 is further included.

The base lock device 80 includes a coupling advancing/retracting portion 81 and a base lock portion 80a disposed in the first-side base 11, and a base locked portion 80b disposed in the second-side base 12. The coupling advancing/retracting portion 81 includes a third drive cylinder 82 and a coupling protrusion configured to be advanced and retracted by the third drive cylinder 82. A base lock piece 84 of the base lock portion 80a includes a coupling protruding portion 84b positioned on a tip side, an coupling receiving portion 84a positioned on a base portion side, and a base lock shaft 85 positioned between the coupling protruding portion 84b and the coupling receiving portion 84a. The base locked portion 80b includes a coupled projecting portion 89 in which a coupling recessed portion 89b is to be formed. A coupling space 88 is formed by a pair of the coupling receiving portions 84a being in an open state. By the base lock piece 84 being pivoted around the base lock shaft 85 by a fourth drive cylinder 86, the coupling protruding portion

84b is engaged with the coupling recessed portion 89b, and then, by the coupling protrusion 83 is inserted into the coupling space 88 by extension of the third drive cylinder 82, the first-side base 11 and the second-side base 12 are coupled and fixedly locked.

[0090]

According to the above preferred embodiment, it is possible to easily switch between fixedly locking and lock release between the first-side base 11 and the second-side base 12.

[0691]

In addition, in the offshore platform 1 of one preferred embodiment, the third drive cylinder 82 and the fourth drive cylinder 86 are driven by hydraulic pressure.

[0092]

According to the above preferred embodiment, since the hydraulic circuit can be shared with other drive cylinders, the cost can be reduced.

[0093]

In addition, in the offshore platform 1 of one preferred embodiment, the offshore installation object 2 is a landing type wind power generation facility 2 in which a blade 25 and a nacelle 26 are installed in advance on the supporting column 21.

[0094]

According to the above preferred embodiment, since the assembly work at the installation location on the sea is unnecessary, the risk is reduced, tt is less likely to be affected by the weather, and a heavy machine such as a large crane is unnecessary.

[0095]

In addition, in the offshore platform 1 of one preferred embodiment, the offshore platform 1 is a self-elevating type.

[0096]

According to the above preferred embodiment, by disposing the base 10 at a position higher than the sea level A. the base 10 is less likely to be affected by waves or the like and is less likely to be rocked, so that the work required for installing the offshore installation object 2 is stabilized.

Claims

CONCLUSIESCONCLUSIONS

1. Offshoreplatform, omvattende: een basis die is ingericht om langs een pasvlak in tweeën te worden gedeeld, waarbij de basis een eerste steungat voor het daardoor inbrengen van een steunkolom van een offshore- installaticobject, een eerste-zijde-basis. en een tweede-zijde-basis omvat; een eerste klem die op de basis en rond het eerste steungat geplaatst is, waarbij de eerste klem een eerste eerste-zijde-klem en een eerste tweede-zijde-klem omvat die zijn ingericht om langs het pasvlak in tweeën te worden gedeeld; een tweede klem die boven de eerste klem geplaatst is, waarbij de tweede klem is ingericht om langs het pasvlak in tweeën te worden gedeeld, waarbij de tweede klem een tweede steungat, een tweede eerste-zijde-klem en een tweede tweede-zijde-klem omvat; en een steunkolomhefinrichting die is ingericht om de tweede klem zodanig te steunen dat deze geheven kan worden, waarbij, door het klemmen en ontklemmen in de eerste klem en het klemmen en ontklemmen in de tweede klem te combineren, het klemmen en ontklemmen van de steunkolom en het heffen van de steunkolom worden uitgevoerd.An offshore platform, comprising: a base adapted to bisect along a mating surface, the base having a first support hole for insertion therethrough of a support column of an offshore installation object, a first side base. and comprises a second side base; a first clamp disposed on the base and around the first support hole, the first clamp comprising a first first side clamp and a first second side clamp adapted to bisect along the mating surface; a second clip disposed above the first clip, the second clip configured to bisect along the mating surface, the second clip having a second support hole, a second first side clip, and a second second side clip includes; and a support column lifting device arranged to support the second clamp so that it can be lifted, wherein, by combining the clamping and unclamping in the first clamp and the clamping and unclamping in the second clamp, the clamping and unclamping of the support column and lifting of the support column.

2. Offshoreplatform volgens conclusie 1, waarbij, door te zwenken om een buiten het pasvlak aangebracht scharnierbeen, de eerste-zijde-basis en de tweede-zijde-basis worden gescheiden door in bovenaanzicht in een V-vorm geopend te zijn.An offshore platform according to claim 1, wherein, by pivoting about an out-of-mating hinge leg, the first side base and the second side base are separated by being opened in a V-shape in plan view.

3. Offshoreplatform volgens conclusie 1 of 2, waarbij de steunkolom een flensgedeelte bij een centraal gedeelte in de lengterichting van de steunkolom omvat, en waarbij de tweede klem het flensgedeelte steunt.An offshore platform according to claim 1 or 2, wherein the support column includes a flange portion at a central longitudinal portion of the support column, and wherein the second clamp supports the flange portion.

4. Offshoreplatform volgens een van de conclusies 1 tot en met 3, waarbij het offshore- installatieobject wordt getransporteerd door de steunkolom in een bovenste positie te klemmen met de eerste klem en de tweede klem.An offshore platform according to any one of claims 1 to 3, wherein the offshore installation object is transported by clamping the support column in an upper position with the first clamp and the second clamp.

5. Offshoreplatform volgens een van de conclusies 1 tot en met 4, waarbij het offshore- installatieobject op zee wordt geïnstalleerd door de steunkolom te klemmen met de tweede klem, de steunkolom te ontklemmen met de eerste klem, en de tweede klem neer te laten met de steunkolomhefinrichting.An offshore platform according to any one of claims 1 to 4, wherein the offshore installation object is installed at sea by clamping the support column with the second clamp, unclamping the support column with the first clamp, and lowering the second clamp with the support column lifting device.

6. Offshoreplatform volgens een van de conclusies 1 tot en met 5, waarbij het offshore- installatieobject van het offshoreplatform wordt gescheiden door de steunkolom te ontklemmen met de tweede klem.An offshore platform according to any one of claims 1 to 5, wherein the offshore installation object is separated from the offshore platform by unclamping the support column with the second clamp.

7. Offshoreplatform volgens een van de conclusies 1 tot en met 6, waarbij het offshoreplatform wordt verwijderd van het offshore-installatieobject door de basis te verdelen in de eerste-zijde-basis en de tweede-zijde-basis nadat het offshore-installatieobject is geïnstalleerd op zee.The offshore platform according to any one of claims 1 to 6, wherein the offshore platform is removed from the offshore installation object by dividing the base into the first side base and the second side base after the offshore installation object is installed at sea.

8. Offshoreplatform volgens conclusie 7, waarbij de eerste-zijde-basis en de tweede-zijde- basis verenigbaar zijn voor het op zee bewegen van het offshoreplatform.An offshore platform according to claim 7, wherein the first side base and the second side base are compatible for moving the offshore platform at sea.

9. Offshoreplatform volgens een van de conclusies 1 tot en met 8, waarbij elk van de eerste klem en de tweede klem een steunkolomkleminrichting met een steankolomvergrendelingsgedeelte en een vergrendeld steunkolomgedeelte omvat, het steunkolomvergrendelingsgedeelte omvat een steunkolomkoppelingsgedeelte dat is ingericht om te worden gekoppeld met een vergrendeld steunkolomgedeelte, een koppelingsschakelgedeelte dat is ingericht om te schakelen tussen koppeling en ontkoppeling van het steunkolomkoppelingsgedeelte met het vergrendelde steunkolomgedeelte, en een eerste aandrijfeilinder die is ingericht om het steunkolomkoppelingsgedeelte aan te drijven, waarbij, door koppeling van het steunkolomkoppelingsgedeelte met het vergrendelde steunkolomgedeelte, het klemmen van de steunkolom door elk van de eerste klem en de tweede klem wordt uitgevoerd. en waarbij, door het losmaken van de koppeling van het steunkolomkoppelingsgedeelte met het vergrendelde steunkolomgedeelte, het losmaken van de klemming van de steunkolom door elk van de eerste klem en de tweede klem wordt uitgevoerd.An offshore platform according to any one of claims 1 to 8, wherein each of the first clamp and the second clamp comprises a support column clamping device having a support column locking portion and a locked support column portion, the support column locking portion comprising a support column coupling portion adapted to be coupled with a locked support column support column portion, a clutch switching portion configured to switch between coupling and disengagement of the support column coupling portion with the locked support column portion, and a first drive cylinder configured to actuate the support column coupling portion, wherein, by coupling the support column coupling portion with the locked support column portion, the clamping of the support column is performed by each of the first clamp and the second clamp. and wherein, by releasing the coupling of the support column coupling portion to the locked support column portion, releasing the clamping of the support column is performed by each of the first clamp and the second clamp.

10. Offshoreplatform volgens conclusie 9, waarbij het koppelingsschakelgedeelte omvat: een koppel-as die is ingericht om het steunkolomkoppelingsgedeelte zwaaibaar te koppelen met een stang van de eerste aandrijfcilinder; een zwenk gedeelte dat is voorzien aan een basis van het steunkolomkoppelingsgedeelte, waarbij het zwenkgedeelte een onder de koppel-as gepositioneerde zwenkas omvat; en een geleidingsgedeelte met een vlak gedeelte dat zich vlak uitstrekt en een gebogen gedeelte dat zich opwaarts buigend uitstrekt vanaf het vlakke gedeelte, waarbij, wanneer de stang van de eerste aandrijfcilinder zich voortbeweegt in de richting van het vergrendelde steunkolomgedeelte, koppeling van het steunkolomkoppelingsgedeelte met het vergrendelde steunkolomgedeelte losgemaakt wordt doordat een uiteindekoppelingsgedeelte van het steunkolomkoppelingsgedeelte opwaarts wordt gezwenkt, en waarbij, wanneer de stang van de eerste aandrijfcilinder zich terugtrekt uit het vergrendelde steunkolomgedeelte, koppeling van het steunkolomkoppelingsgedeelte met het vergrendelde steunkolomgedeelte uitgevoerd wordt doordat een uiteindekoppelingsgedeelte van het steunkolomkoppelingsgedeelte neerwaarts wordt gezwenkt.The offshore platform of claim 9, wherein the coupling link portion comprises: a coupling shaft configured to swingably couple the support column coupling portion to a rod of the first drive cylinder; a pivot portion provided at a base of the support column coupling portion, the pivot portion including a pivot shaft positioned below the link shaft; and a guide portion having a flat portion extending flat and a bent portion bending upwardly extending from the flat portion, wherein, as the rod of the first drive cylinder advances toward the locked support column portion, engaging the support column coupling portion with the locked support column portion is released by an end coupling portion of the support column coupling portion being pivoted upwardly, and wherein, when the rod of the first drive cylinder retracts from the locked support column portion, coupling of the support column coupling portion to the locked support column portion is performed by pivoting an end coupling portion of the support column coupling portion downwardly .

11. Offshoreplatform volgens conclusie 9 of 10, waarbij de eerste aandrijfcilinder is aangedreven door hydraulische druk.An offshore platform according to claim 9 or 10, wherein the first drive cylinder is driven by hydraulic pressure.

12. Offshoreplatform volgens een van de conclusies 1 tot en met 11, waarbij de steunkolomhefinrichting een tweede aandrijfcilinder van het meertrapstelescooptype omvat.An offshore platform according to any one of claims 1 to 11, wherein the support column lift comprises a second multi-stage telescopic drive cylinder.

13. Offshoreplatform volgens conclusie 12, waarbij de tweede aandrijfcilinder een bovenste cilinder, welke in meerdere trappen opwaarts uitzet en samentrekt, en een onderste cilinder, welke in meerdere trappen uitzet en neerwaarts samentrekt, omvat.An offshore platform according to claim 12, wherein the second drive cylinder comprises an upper cylinder which expands and contracts upwardly in stages and a lower cylinder which expands and contracts downwardly in multiple stages.

14. Offshoreplatform volgens conclusie 12 of 13, waarbij de tweede aandrijfcilinder is aangedreven door hydraulische druk.An offshore platform according to claim 12 or 13, wherein the second drive cylinder is driven by hydraulic pressure.

15. Offshoreplatform volgens een van de conclusies 1 tot en met 14, verder omvattende een basisvergrendelingsinrichting die is ingericht om de eerste-zijde-basis en de tweede-zijde-basis vast te vergrendelen, waarbij de basisvergrendelingsinrichting een koppelend voortbeweeg-/terugtrekgedeelte en een basisvergrendelingsgedeelte. geplaatst in de eerste-zijde-basis, en een vergrendeld basisgedeelte dat in de tweede-zijde-basis is geplaatst, omvat, waarbij het voortbeweeg-/terugtrek gedeelte een derde aandrijfcilinder en een koppelingsuitsteeksel omvat dat 1s ingericht om door de derde aandrijfcilinder te worden voortbewogen en teruggetrokken, waarbij een basisvergrendelingsstuk van het basisvergrendelingsgedeelte een aan een uiteindezijde gepositioneerd uitstekend koppelingsgedeelte, een aan een basiszijde gepositioneerd ontvangend koppelingsgedeelte, en een basisvergrendelingsas omvat die gepositioneerd is tussen het uitstekende koppelingsgedeelte en het, waarbij het vergrendelde basisgedeelte een gekoppeld uitstekend gedeelte omvat waarin een verzonken koppelingsgedeelte dient te worden gevormd,An offshore platform according to any one of claims 1 to 14, further comprising a base locking device adapted to fixedly lock the first side base and the second side base, the base locking device having an interlocking advance/retract portion and a basic locking part. disposed in the first side base, and includes a locked base portion disposed in the second side base, the advance/retract portion comprising a third actuating cylinder and a clutch projection adapted to be engaged by the third actuating cylinder. advanced and retracted, wherein a base locking piece of the base locking portion includes an end side protruding coupling portion, a receiving coupling portion positioned at a base side, and a base locking shaft positioned between the protruding coupling portion and the, wherein the locked base portion includes a coupled protruding portion in which a recessed coupling part must be formed,

waarbij een koppelingsruimte wordt gevormd doordat een paar van de ontvangende koppelingsgedeelten zich in een open toestand bevindt, en waarbij, doordat het basisvergrendelingsstuk door een vierde aandrijfcilinder om de basisvergrendelingsas wordt gezwenkt, het uitstekende koppelingsgedeelte wordt gekoppeld met het verzonken koppelingsgedeelte, en waarbij vervolgens, doordat het koppelingsuitsteeksel in de koppelingsruimte wordt ingebracht door verlenging van de derde aandrijfcilinder, de eerste-zijde- basis en de tweede-zijde-basis zijn gekoppeld en vast vergrendeld.wherein a clutch space is formed by a pair of the receiving clutch portions being in an open state, and wherein, as the base locking piece is pivoted about the base locking axis by a fourth drive cylinder, the protruding clutch portion is engaged with the recessed clutch portion, and then, by the clutch protrusion is inserted into the clutch space by extending the third drive cylinder, the first side base and the second side base are coupled and locked tight.

16. Offshoreplatform volgens conclusie 15, waarbij de derde aandrijfcilinder en de vierde aandrijfcilinder zijn aangedreven door hydraulische druk.An offshore platform according to claim 15, wherein the third drive cylinder and the fourth drive cylinder are hydraulic pressure driven.

17. Offshoreplatform volgens een van de conclusies 1 tot en met 16, waarbij het offshore- installatieobject een windenergie-opwekinstallatie van het aanlandingstype is waarin een blad en een gondel vooraf op de steunkolom zijn geïnstalleerd.An offshore platform according to any one of claims 1 to 16, wherein the offshore installation object is a landfall type wind power generation installation in which a blade and nacelle are pre-installed on the support column.

18. Offshoreplatform volgens een van de conclusies | tot en met 17, waarbij het offshoreplatform van het zelfheffende type is.18. Offshore platform according to one of the claims | through 17, where the offshore platform is of the self-elevating type.