KR-20260067657-A - Wind turbine installation vessel including waterjet apparatus for reducing the load transmitted to a jack-up device during hull lifting and vessel lifting method

Abstract

A wind turbine installation vessel equipped with a water jet device that reduces the load transmitted to a jack-up device when the hull is lifted and lowered, and a method for lifting and lowering the same are disclosed. A wind turbine installation vessel according to one embodiment of the present invention may include: a hull; a jack-up device installed on the hull and lifting and lowering the hull; and a water jet device installed on the hull and reducing the hull load transmitted to the jack-up device when the jack-up device lifts and lowers the hull.

Inventors

• 이평국
• 강경태
• 박종우
• 손혜종
• 안규중

Assignees

• 삼성중공업 주식회사

Dates

Publication Date

20260513

Application Date

20241106

Claims (7)

1. Regarding wind turbine installation lines, hull; A jack-up device installed on the hull and for raising and lowering the hull; and A wind turbine installation vessel comprising a water jet device installed on the hull and reducing the hull load transmitted to the jack-up device when the jack-up device raises the hull.
2. In paragraph 1, A wind turbine installation vessel further comprising a control unit that detects the load on the hull applied to the jack-up device and operates the water jet device when the load is greater than a preset load.
3. In either of paragraphs 1 and 2, The above water jet device is installed on the inner bottom surface of the hull, and The above water jet device is, A wind turbine installation vessel comprising a seawater tank for storing seawater; and a spray nozzle installed on the lower surface of the seawater tank and spraying the seawater of the seawater tank downward.
4. In paragraph 3, The above water jet device is, A wind turbine installation vessel further comprising: a seawater pipe connected to the seawater tank and having a variable length such that its end is located below the water surface; and a pump that pumps seawater through the seawater pipe and compresses and stores it in the seawater tank.
5. In paragraph 4, A wind turbine installation vessel in which the above seawater pipe is shortened to a minimum length when the wind turbine installation vessel is in motion, and extended to increase in length according to the lifting height when the hull is lifted after being caught on the seabed, so that the end is located below the water surface.
6. In the method of lifting and lowering a wind turbine installation vessel, A step of raising and lowering the hull using a jack-up device installed on the hull; and A method for lifting a wind turbine installation vessel comprising the step of reducing the hull load transmitted to the jack-up device using a water jet device when the jack-up device lifts the hull.
7. In paragraph 6, The step of reducing the hull load is a method for lifting a wind turbine installation vessel by detecting the hull load applied to the jack-up device and operating the water jet device when the load is greater than a preset load.

Description

Wind turbine installation vessel including waterjet apparatus for reducing the load transmitted to a jack-up device during hull lifting and vessel lifting method The present invention relates to a wind turbine installation vessel equipped with a water jet device that reduces the load transmitted to a jack-up device during hull lifting, and a lifting method thereof. Work vessels operating at sea require a device to control their working space, as it may sway or shift in position due to ocean currents or other factors depending on sea conditions. The most commonly used method is mooring, and in deep water, position control is sometimes achieved using a maneuverable propulsion system. When it is necessary to securely fix the position and stably anchor the work platform (hull), there is a method of installing vertically moving legs on the hull. When moving to a work area, such a vessel moves by raising its legs, and after reaching the work area, it lowers its legs to the seabed. As the legs are lowered while touching the seabed, the hull is lifted above the water surface, and from this point on, it is fixed to the seabed by its own weight and legs rather than buoyancy, thereby securing a stable workspace regardless of the marine environment. Figure 1 is a diagram showing the process of fixing the hull's position at sea by a leg. 1) Moving to the work area: Since the resistance caused by the leg (20) interferes with the movement of the work vessel (1), the leg (20) is raised as high as possible to move. 2) Adjustment of work position: Arrive at the work position and precisely align the position to be fixed. The adjustment of the work position can be performed by controlling the thrust direction of some of the thrusters installed on the hull (10). 3) Leg lowering: Lower the leg (20) using a leg lifting system until the end of the leg is embedded in the seabed. 4) Hull lifting: The hull (10) is lifted above the water surface using a leg lowering device. A Wind Turbine Installation Vessel (WTIV), one of the work vessels, is a ship designed to install offshore wind turbines. After the wind turbine installation vessel moves to the installation site, it secures the hull; once the securing is complete, the tower and generator are installed. This process necessarily involves a jack-up operation to lift the hull above the water surface. During this operation, a very heavy load is placed on the jack-up device due to the weight of the hull. The matters described in the technical background section of this invention are for the purpose of understanding the background of the invention and cannot be concluded as prior art already known to a person with ordinary knowledge in the field to which this technology belongs. FIG. 1 is a drawing showing the process of fixing the hull's sea position by a leg, FIG. 2 is a plan view of a wind turbine installation line to which a load reduction device according to one embodiment of the present invention is applied. FIG. 3 is a side view of a wind turbine installation line to which a load reduction device according to one embodiment of the present invention is applied. FIG. 4 is a detailed configuration diagram of a water jet device, FIG. 5 is a flowchart of a method for boarding a ship on a wind turbine installation vessel to which a load reduction device according to one embodiment of the present invention is applied. The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the invention to specific embodiments, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. A vessel or platform that anchors its hull to the seabed using legs is hereinafter referred to as a "work vessel." A representative example of a work vessel is a wind turbine installation vessel (WTIV). For the convenience of understanding and explaining the invention, the following description will assume that the work vessel is a wind turbine installation vessel. FIG. 2 is a plan view of a wind turbine installation line with a load reduction device applied according to one embodiment of the present invention, FIG. 3 is a side view of a wind turbine installation line with a load reduction device applied according to one embodiment of the present invention, and FIG. 4 is a detailed configuration diagram of a water jet device. FIGS. 2 to 4 illustrate a wind turbine installation vessel (100), a hull (110), a jack-up device (120), a leg (121), a lifting unit (122), a water jet device (130), a seawater tank (131), a spray nozzle (132), a seawater pipe (133), a pump (134), a control unit (140), and a load measuring sensor (141). A wind turbine installation vessel (100) equipped with a load reduction device according to one embodiment of the pres