KR20240022037A - Floating jig and method for installing support structure of offshore wind power generator using the same - Google Patents

Abstract

A floating jig is disclosed for lifting and storing a support structure for an offshore wind power generator and lowering the support structure for an offshore wind power generator at a target point. The disclosed floating jig includes a floating jig main body including a buoyancy tank; And installed on the floating jig body, for storing or transporting the support structure for the offshore wind power generator, lifting and maintaining the support structure for the offshore wind power generator, and putting down the support structure for the offshore wind power generator. It includes a lifting type holding device that operates to lower the support structure for the offshore wind turbine.

Description

Floating jig and method for installing support structure for offshore wind power generator using the same {Floating jig and method for installing support structure of offshore wind power generator using the same}

The present invention relates to a floating jig that can be used exclusively for installing support structures for offshore wind power generators, and more specifically, to support structures for offshore wind power generators not only on land but also at sea, and in particular, to jackets for offshore wind power generators. It relates to a floating jig that can be used to stack and transport a type support structure.

The biggest advantage of the land-based construction method is that it can greatly increase the production capacity of ships that can only be built in dry docks. Technically, it can be referred to as “ease of access to equipment and personnel,” that is, accessibility. Since the land-based drying method can move blocks weighing hundreds to thousands of tons using new transportation equipment such as transporters and modulars in addition to Goliath cranes, it is also possible to make large blocks that exceed the capacity of Goliath cranes.

Looking at the process of the land-based construction method, blocks made in factories within a shipyard are gathered and assembled on a quay wall equipped with Goliath cranes. The completed ship is moved to the floating dock using a skid-rail (a device that moves the vehicle when moving from land to sea). This process of movement is called ‘load-out’ because it means returning from land to sea.

A tugboat pulls the floating dock where the ship has moved to the sea and submerges the floating dock at sea. After natural levitation using the buoyancy of the completed ship, the ship is moved, and the semi-submerged floating dock is refloated to its original state by draining water from the ship's ballast water storage (ballast tank). This is called ‘Launching’.

Because the weight of the ship is so large, loadout is the core of the technology to control and maintain the minute movements and balance of the floating dock at sea connected to the land in real time. Launching is a semi-submersible ship that operates in real time depending on sea and weather conditions. The key is control and control technology.

For land-based construction, various methods are needed to move ships built on land to the sea. The difference in movement method is each company's unique technology.

A representative example of the longitudinal launch method is Seongdong Shipbuilding & Marine Engineering’s “GTS (Gripper-Jacks Translift System) method.” The core of Seongdong Shipbuilding & Marine Engineering’s GTS method is a small piece of equipment called the ‘push-pull system’, which is 3 meters long and 1 meter long and 1 meter long. The push-pull system independently developed by Seongdong Shipbuilding & Marine Engineering succeeded in the world’s first ‘longitudinal’ loadout by grabbing the stern and pulling it out. The ship is placed on 70 pieces of equipment called 'bogey train' (a means of transportation that loads the ship and drags it to the floating dock), which can support a weight of 500 tons per ship, and floats in the air at a height of about 2 meters, and then the push-pull system is activated. It's a way to push the train. The land-based construction method can be applied anywhere as long as there is a construction space because it can be built using existing ship quay facilities without the need to build a dock or fleet dedicated to conventional shipbuilding. The initial facility investment cost is low, and the construction efficiency is not much different from that of a dedicated dock facility. However, through the land-based drying method, the operational efficiency of the entire shipyard can be increased to maximize sales, and the ship owner can actively respond to the delivery time required. .

It should be noted that not all of the background technologies described above are known technologies.

Registration number 10-1645362 (registered on July 28, 2016)

Meanwhile, because the support structures for offshore wind power generators are large and heavy, dedicated jigs are required to place or move them. This jig properly distributes the load of the structure and requires a structure that allows a low-floor vehicle to go underneath and lift it. Conventionally, jigs are used only to stably support structures built on land and move them to a desired location on land. The limited range of use of such jigs on land significantly reduces productivity and economic efficiency.

The technical problem to be solved by the present invention is a floating jig that can be used not only on land but also at sea, and can store and transport the support structure for an offshore wind turbine to a desired location and place it on the sea floor, and a floating jig for an offshore wind turbine using the same. It provides a method of installing a support structure.

According to one aspect of the present invention, a floating jig is provided for lifting and storing a support structure for an offshore wind power generator and lowering the support structure for an offshore wind power generator at a target point, and the floating jig includes a buoyancy tank. A floating jig body that does; And installed on the floating jig body, for storing or transporting the support structure for the offshore wind power generator, lifting and maintaining the support structure for the offshore wind power generator, and putting down the support structure for the offshore wind power generator. It includes a lifting type holding device that operates to lower the support structure for the offshore wind turbine. The elevating holding device preferably includes a winch, but the elevating holding device may also include a hoist, etc.

According to one embodiment, the floating jig body may include a central space so that the support structure for the offshore wind power generator can be located and stored inside.

According to one embodiment, the central space may be a space in which the upper, lower, and front portions are open and both side and rear portions are closed.

According to one embodiment, the floating jig body may have a “ㄷ” shape when viewed from above.

According to one embodiment, the elevating holding device includes a plurality of winches, each of the plurality of winches having a winch line connected to a leg of the support structure for the offshore wind power generator, and winding or unwinding the winch line. It may include a winch drive unit that lowers or lifts the support structure for the offshore wind power generator.

According to one embodiment, each of the plurality of winches may further include a space for storing the winch line wound up between the winch driving unit and the floating jig body.

According to one embodiment, the floating jig may further include guide means for guiding the support structure for the offshore wind power generator when lifting or lowering the support structure for the offshore wind power generator.

According to one embodiment, the floating jig may further include a supporting unit that protrudes from the inner surface of the central space into the central space and supports the lower portion of the support structure for the offshore wind power generator.

According to one embodiment, the support structure for the offshore wind power generator is a support structure for the offshore wind power generator including a plurality of legs, and the floating jig body is so that the support structure for the offshore wind power generator can be located and stored inside. It includes a central space in which the upper, lower, and front portions are open and both side and rear portions are closed, and the elevating holding device senses a plurality of winch lines connected to lower portions of the plurality of legs, and each of the plurality of winch lines. It includes a plurality of winch driving parts that lower or lift the support structure for the offshore wind power generator by lowering or releasing it, and a box installed between the winch driving part and the floating jig body and forming a space for storing the rolled-up winch line. .

According to one embodiment, the elevating holding device is such that, for storage and transportation of the support structure for the offshore wind power generator, the lower end of the support structure for the offshore wind power generator is at a height higher than the lower surface of the floating jig main body. The support structure for the offshore wind power generator is lifted, and in the target sea area, the support structure for the offshore wind power generator is lowered until it passes through the lower surface of the floating jig main body and reaches the seabed.

In the method of installing a support structure for an offshore wind power generator according to one aspect of the present invention, a floating jig on land lifts and stores the support structure for an offshore wind power generator, and the floating jig that stores the support structure for an offshore wind power generator is installed on land. It includes transporting the jig to the sea, and allowing the floating jig to place the support structure for the offshore wind power generator on the sea floor while the floating jig is floating on the sea in the target sea area.

According to one embodiment, in order to transport the floating jig from land to sea and float it on the sea, a floating dock is docked on a quay wall, and after transporting the floating jig from the quay wall to the floating dock, the floating dock is The floating dock is submerged while spaced apart from the quay wall, and the floating jig is floated on the sea.

According to one embodiment, the floating jig includes a floating jig body and a winch installed on the floating jig body, and for storage of the support structure for the offshore wind power generator, the winch supports the offshore wind power generator. In order to lift and maintain the structure to a height higher than the height of the lower surface of the floating jig body and to lower the support structure for the offshore wind power generator on the sea floor, the winch lifts the support structure for the offshore wind power generator until it reaches the sea floor. get off

According to one embodiment, when the support structure for the offshore wind power generator is placed on the sea floor, the anchor is lowered to fix the floating jig.

The present invention is a floating jig including a floating jig body made of a floating body for placing and moving a support structure for an offshore wind power generator assembled on land, and provides a support structure for an offshore wind power generator not only on land but also at sea. It can be used as a means of support. In addition, the floating jig according to the present invention moves the support structure for the offshore wind power generator to the installation area in the sea and performs installation by lowering it to the seabed foundation ground, thereby performing the installation, which is essential when installing the support structure for the offshore wind power generator. The rental cost of marine equipment can be reduced. The support structure for an offshore wind power generator completed on land requires a lot of storage space due to its large size, and it can be placed in the sea using a floating jig.

According to the present invention, the method of installing a support structure for an offshore wind power generator at sea using a floating jig can significantly reduce the cost burden compared to the method of using a conventional offshore crane.

Figure 1 is a perspective view showing a floating jig according to an embodiment of the present invention,
Figure 2 is a front view showing a floating jig according to an embodiment of the present invention,
Figure 3 is a side view showing a floating jig according to an embodiment of the present invention;
Figure 4 is a diagram for explaining the winch of the floating jig shown in Figures 1 to 3,
Figure 5 is a front view showing a floating jig equipped with a guide means according to another embodiment of the present invention;
Figure 6 is a front view showing a floating jig equipped with a supporting unit according to another embodiment of the present invention;
FIGS. 7 to 11 are diagrams of one embodiment for explaining a process of installing a support structure for an offshore wind power generator at sea using the floating jig shown in FIGS. 1 to 6.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The invention may be implemented in many different forms and is not limited to the embodiments described herein.

In explaining the present invention, the size or shape of components shown in the drawings may be exaggerated or simplified for clarity and convenience of explanation.

Additionally, terms specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. These terms should be interpreted as meanings and concepts consistent with the technical idea of the present invention based on the content throughout this specification.

In order to clearly explain the present invention, descriptions of parts unrelated to the technical idea of the present invention have been omitted, and identical or similar components are assigned the same reference numerals throughout the specification.

1 to 3, the floating jig 100 according to an embodiment of the present invention is a support structure for an offshore wind power generator, more specifically, a jacket-type support structure 10 for an offshore wind power generator on land and It is designed to be stored and transported at sea, or lowered to the seabed. More specifically, the floating jig 100 is configured to store the jacket-type support structure 10 for an offshore wind power generator manufactured on land at sea, and further, the stored jacket-type support structure for an offshore wind power generator. (10) is configured to be transported and installed in the target sea area.

The jacket-type support structure 10 for an offshore wind turbine has a plurality of legs 12 (in this embodiment, three) extending obliquely in a form that gathers closer from the bottom toward the top, and between the plurality of legs 12. It includes a plurality of bracing members 14 that connect and reinforce them, a jacket upper part 16 coupled to the top of the plurality of legs 12, and a transition piece 18 coupled to the jacket upper part 16. . Although not shown, the lower end of the tower is coupled to the transition piece 18, and a nacelle, rotor, and blades are installed at the upper end of the tower.

The floating jig 100 includes a floating jig body 120 that includes a buoyancy tank of a sealed structure so that it can float on the sea, and a jacket-type support structure 10 for an offshore wind power generator. 100) and includes a lifting-type holding device that maintains it. As will be described in detail below, the elevating holding device maintains the connection between the floating jig main body 120 and the jacket-type support structure 10 for an offshore wind power generator. It is configured so that (10) can be lowered or lifted upward. In particular, the action of the lifting type holding device that lowers the jacket-type support structure 10 for an offshore wind power generator can be advantageously used to lower and land the jacket-type support structure 10 for an offshore wind power generator on the seabed. The elevating holding device has a height at which the jacket-type support structure 10 for an offshore wind power generator can be stored and transported on land, that is, the lower end of the jacket-type support structure 10 for an offshore wind power generator is the floating jig body 120. ) can be lifted and maintained at a height higher than the lower surface of the sea, and at sea, the lower end of the jacket-type support structure 10 for an offshore wind power generator passes through the lower surface of the floating jig main body 120 and lies on the sea floor. The jacket-type support structure 10 for the offshore wind power generator can be lowered so as to reach.

The floating jig body 120 is open at the top, bottom and front, and has both sides and It consists of a block structure having a “ㄷ” shape when viewed from above, including a central space 122 whose rear portion is blocked. The front opening of the central space 122 allows the jacket-type support structure 10 for an offshore wind turbine to enter or exit the central space 122.

The elevating holding device is connected to each of the three legs 12, more specifically, the three lower legs 12a of the jacket-type support structure 10 for the offshore wind power generator located in the central space 122, It includes a winch line 142 made of a chain, and the winch line 142 is wound or unwound around the winch drive unit 144 to lower or lift the jacket-type support structure 10 for an offshore wind power generator. It includes a plurality of large winches 140 that can be used. Each of the plurality of winches 140 is located on the lower side of the winch driving part 144, and more specifically, between the winch driving part 144 and the upper surface of the floating jig body 120 is a space where the wound winch line 142 is stored. A box 146 in which (146a) is formed is installed. In addition to providing a space 146a where the winch line 142 is stored, the box 146 sufficiently increases the installation height of the winch drive unit 144, thereby ensuring a sufficient operating distance. In addition, a control box that controls the operation of the winch driving unit 144 is provided on the floating jig body 120. In addition, the winch line 142, more specifically, the winch line 142 made of a chain, has a sufficient length to anchor the jacket-type support structure 10 for an offshore wind power generator on the seafloor.

In order to stably hold the lifted jacket-type support structure (10) for an offshore wind power generator to the floating jig body (120), a lashing is placed between the floating jig body (120) and the jacket-type support structure (10) for an offshore wind power generator. It is desirable to perform the task.

Additionally, as in the embodiment illustrated in FIG. 5, a guide means ( A floating jig 100 further comprising 160) is within the scope of the present invention. If the vertical structure included in the jacket-type support structure 10 for an offshore wind power generator or the jacket-type support structure 10 for an offshore wind power generator is a vertically extending structure with a certain cross-section, the guide means 160 is A structure that guides the vertical movement of the jacket-type support structure 10 for an offshore wind turbine is sufficient. In the case of an inclined structure as in this embodiment, a jacket-type support for an offshore wind power generator is used, such as a spring or a hydraulic or pneumatic cylinder, that extends in a direction closer to the center of the central space or contracts in the opposite direction. As the structure 10 is raised and lowered, the parts of the guide means 160 in contact with the jacket-type support structure 10 for an offshore wind power generator move away from each other or become narrower, and are connected to the jacket-type support structure 10 for an offshore wind power generator. Contact can be maintained continuously.

In addition, as in the embodiment illustrated in FIG. 6, the floating jig 100 is a supporting unit to relieve the shaking of the lifted jacket-type support structure 10 for an offshore wind power generator and the force applied to the winch line 142. (180) may be further included. The supporting unit 180 is installed on the inner wall of the central space 122 of the floating jig main body 120, and protrudes inward from the inner wall when used, forming a jacket-type support structure 10 for an offshore wind power generator. It can support the lower part of the. Since the entire load of the jacket-type support structure 10 for an offshore wind turbine is divided and distributed to the winch line 142 and the supporting unit 180 made of chains, the weight of the lifted jacket-type support structure 10 for an offshore wind turbine is Support stability can be improved.

7 to 11 are diagrams for explaining a method of installing the jacket-type support structure 10 for an offshore wind power generator using the floating jig 100 described above.

First, referring to FIGS. 7 and 8, it can be seen that the floating jig 100 can be transported on land while maintaining the jacket-type support structure 10 for an offshore wind power generator. In this state, the winch 140 sufficiently lifts the jacket-type support structure 10 for an offshore wind power generator, so that the lower end of the jacket-type support structure 10 for an offshore wind power generator is higher than the lower surface of the floating jig main body 120. It is in a high position. Next, the floating jig 100, which lifts and stores the jacket-type support structure 10 for an offshore wind power generator, is docked on the quay wall 300 by land transport equipment such as a transporter and modular. It is loaded onto dock 400. At this time, a ship with a semi-submersible function may be used instead of a floating dock.

Referring to FIGS. 9 and 10 in turn, the floating dock 400 is separated from the quay wall 300 and dives while located in the sea, and then exits the lower area of the floating jig 100, thereby, The floating jig 100 floats on the sea due to the buoyancy of the floating jig body 120 itself. At this time, the floating jig 100 can be transported using a barge or moved to a specific location and anchored.

Next, referring to FIG. 11, when the floating jig 100 reaches the target sea area, the position of the moved floating jig 100 is fixed, and then the winch 140 installed on the floating jig 100 is driven. The winch line 142 is unwound, and thereby the jacket-type support structure 10 for an offshore wind power generator, which was stored at a certain height in the floating jig 100, is lowered and fixed to the foundation ground of the sea floor. At this time, in order to fix the position of the floating jig 100, for example, a method of lowering an anchor with a hook to prevent the floating jig 100 from moving may be used. Anchors are also used for mooring in specific areas.

With reference to FIGS. 1 to 11, the main functions and operations of the above-described floating jig 100 are summarized as follows.

The floating jig 100 has a plurality of large winches 140 installed on the floating jig main body 120 to support the jacket-type support structure 10 for an offshore wind power generator, and the plurality of winches 140 are used to support the floating jig 100. It functions to lift, lower, or hold the jacket-type support structure 10 for the offshore wind power generator. In order to stably hold the lifted jacket-type support structure 10 for an offshore wind turbine generator, it is desirable to perform a lashing operation between the floating jig body 120 and the jacket-type support structure 10 for an offshore wind turbine generator.

A guide means that can stably support and guide the jacket-type support structure 10 for an offshore wind turbine can be used. A lifting grab can be used as a guiding means. The floating jig body 120 has a sealed space formed inside the floating jig body 120 so that the jacket-type support structure 10 for an offshore wind power generator can be floated on the sea, and this space serves as a buoyancy tank. can play a role.

The floating jig 100 can be used exclusively for the jacket-type support structure 10 for an offshore wind turbine, and the dedicated floating jig 100 is moved and located in the target sea area to support the jacket-type support for the offshore wind turbine. The winch line (preferably, chain) connected to the structure 10 can be released using a plurality of winches 140 to allow the jacket-type support structure 10 for an offshore wind power generator to land on the sea floor.

In the above, as an example, a support structure for an offshore wind power generator, for example, a jacket-type support structure for an offshore wind power generator, is placed on a floating jig on land, and the jacket-type support structure for an offshore wind power generator is transported by moving the floating jig at sea. As described, according to the present invention, the above-described floating jig can be used to place or transport support structures for offshore wind power generators, such as jacket-type support structures for offshore wind power generators, anywhere on land or sea. You can.

Note that the present invention is not limited by the above-described embodiments and can be implemented with various modifications.

Claims (6)

A floating jig that lifts and stores a support structure for an offshore wind power generator and lowers the support structure for an offshore wind power generator at a target point,
A floating jig body including a buoyancy tank; and
It is installed on the floating jig body, for storing or transporting the support structure for the offshore wind power generator, for lifting and maintaining the support structure for the offshore wind power generator, and for putting down the support structure for the offshore wind power generator, in the sea. A floating jig comprising an elevating holding device that operates to lower a support structure for a wind turbine. In claim 1,
The floating jig body is a floating jig, characterized in that it includes a central space so that the support structure for the offshore wind power generator can be located and stored inside. In claim 1,
The elevating holding device includes a plurality of winches,
Each of the plurality of winches,
A winch line connected to the leg of the support structure for the offshore wind power generator,
A floating jig comprising a winch drive unit that winds or unwinds the winch line and lowers or lifts the support structure for the offshore wind power generator. In claim 1,
A floating jig, characterized in that it further comprises a guide means for guiding the support structure for the offshore wind power generator when lifting or lowering the support structure for the offshore wind power generator. In claim 2,
A floating jig, characterized in that it further includes a supporting unit that protrudes from the inner surface of the central space into the central space and supports the lower part of the support structure for the offshore wind power generator. On land, a floating jig lifts and stores the support structure for the offshore wind power generator.
Transporting the floating jig that stores the support structure for the offshore wind power generator from land to sea,
Support for an offshore wind power generator using a floating jig, characterized in that the floating jig lowers the support structure for the offshore wind power generator on the sea floor while the floating jig is floating on the sea in the target sea area. How to install the structure.

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