Semi-submersible offshore floating fan mounting platform

Abstract

A semi-submersible offshore floating type fan installation platform comprises a fan installation platform body and a three-stand-column type fan foundation, the fan installation platform body moves towards the three-stand-column type fan foundation, one stand column of the three-stand-column type fan foundation is provided with a conical groove and a fan floating body winch, and the installation platform body is provided with a butt joint groove and a platform winch. A stand column with a conical groove is inserted into the butt joint groove, a mooring rope is arranged between the fan floating body winch and the platform winch, hydraulic anti-collision devices at the two ends are started to clamp the stand column, and after the stand column is fixed, a hydraulic bolt is started, and a hydraulic rod of a locking hydraulic cylinder is inserted into the conical groove to be fixed. The floating body of the floating fan and the platform can be combined into a floating structure in an operation sea area of the floating fan, and the floating body and the platform are relatively static, so that good conditions are provided for fan installation, and the installation operation of the floating fan on the sea is completed. And the offshore installation operation of the floating fan is realized.

Description

Technical Field

[0001] This invention belongs to the field of marine vessel design and construction, and specifically relates to a semi-submersible offshore floating wind turbine installation platform. Background Technology

[0002] Due to the greater depth of the deep sea, traditional fixed wind turbines with piles can no longer meet the environmental load requirements, making floating wind turbines the best choice for deep sea areas.

[0003] A floating wind turbine mainly consists of two parts: the turbine and the floating body. There are two installation methods when the turbine is installed on the floating body: dock installation and offshore installation.

[0004] Floating wind turbine installation at the dock involves installing the turbine on a floating hull at the dock and then towing the entire unit to the operational area. Currently, floating wind turbine projects in Norway, France, the UK, and other countries all use this dock installation method, completing the installation at the dock and then towing it to the operational area. my country's first floating wind turbine, built by the Three Gorges Corporation, also adopted this dock installation method, completing the installation at the dock and then towing it to the operational area.

[0005] The problem with the dock installation is:

[0006] Floating wind turbines have a large draft, which requires the installation dock to be in a very deep water, usually more than ten meters deep. There are very few docks in China that meet this requirement.

[0007] Floating wind turbines are used in deep-sea areas. After installation at the dock, they can be towed over long distances. However, because floating wind turbines have a high center of gravity, they require harsh environmental conditions for towing. They need long periods of mild weather to be able to tow them, resulting in a short towing window and high risk.

[0008] The offshore installation of floating wind turbines involves first towing the floating body to the operating area, and then installing the wind turbine onto the ladder.

[0009] The advantages of offshore installation are very obvious:

[0010] The installation platform has high efficiency and can carry and install multiple wind turbines at one time, meeting the wind turbine installation needs of large offshore wind farms.

[0011] The installation site is located in the actual sea area where the floating wind turbine is operating, and does not rely on a deep-water wharf;

[0012] This avoids the need to tow the entire floating wind turbine with a high center of gravity; only the floating body of the wind turbine needs to be towed, which increases the safety and efficiency of towing.

[0013] However, offshore installation is not yet in practical use because the difficulty lies in the fact that the floating body of the floating wind turbine and the wind turbine installation platform are both independent floating structures. Their motion responses at sea are different, which results in relative motion between the two. That is, with one as a reference, the other is constantly moving. There is no stable installation environment, so it is difficult to install the floating wind turbine on the floating wind turbine foundation.

[0014] Therefore, there is an urgent need for a wind turbine installation platform that can carry out wind turbine installation operations in the sea areas where floating wind turbines are operating. Summary of the Invention

[0015] To address the above problems, this invention provides a semi-submersible offshore floating wind turbine installation platform, the technical solution of which is as follows:

[0016] A semi-submersible offshore floating wind turbine installation platform includes a wind turbine installation platform and a three-column wind turbine foundation. The wind turbine installation platform has two hull-shaped floats, and a deck box is set between the two hull-shaped floats. The deck box is fixed above the hull-shaped floats by the float columns. A docking groove is set inward from the center of the end of the deck box between the two hull-shaped floats. Hydraulic anti-collision devices are set on both sides inside the docking groove, and anti-collision rubber is fixed to the bottom of the docking groove.

[0017] A hydraulic anti-collision device and a hydraulic pin are provided on the inner side wall of the docking groove. The hydraulic anti-collision device is fixed to the inner side wall of the docking groove by a hydraulic cylinder. The cylinder body of the hydraulic cylinder is fixed to the inner side wall of the docking groove, and the hydraulic rod of the hydraulic cylinder is fixedly connected to the anti-collision rubber. The hydraulic pin includes a locking hydraulic cylinder. The cylinder body of the locking hydraulic cylinder is fixed to the inner side wall of the docking groove, and the front end of the locking hydraulic rod of the locking hydraulic cylinder is tapered.

[0018] The three-column wind turbine foundation has symmetrical conical grooves on both sides of one column, and wind turbine floating winches are fixed on the other two columns. Platform winches are fixed on the deck box and on both sides of the docking groove. Mooring cables are installed between the wind turbine floating winches and the platform winches.

[0019] The wind turbine installation platform moves toward the three-column wind turbine foundation. The columns with conical grooves are inserted into the docking grooves and pressed against the fixed anti-collision devices. The platform winch raises and lowers the mooring cables, thereby pulling the columns at both ends of the three-column wind turbine foundation and causing them to rotate. The three-column wind turbine foundation is rotated from angle α to α=0°. After α=0°, the draft of the wind turbine installation platform is adjusted by adjusting the ballast water to align the locking hydraulic rods and conical grooves. The hydraulic anti-collision devices at both ends are activated to clamp the columns. After the columns are fixed, the hydraulic pins are activated, and the hydraulic rods of the locking hydraulic cylinders are inserted into the conical grooves for fixation.

[0020] Furthermore, the aforementioned semi-submersible offshore floating wind turbine installation platform has anti-collision rubber fixed at the opening of the docking groove.

[0021] Furthermore, the aforementioned semi-submersible offshore floating wind turbine installation platform includes a three-column wind turbine foundation comprising three offshore columns connected by floating bodies, forming an equilateral triangle.

[0022] Furthermore, the aforementioned semi-submersible offshore floating wind turbine installation platform is equipped with a main crane, a living quarters, and a wind turbine component storage yard.

[0023] Furthermore, the aforementioned semi-submersible offshore floating wind turbine installation platform is equipped with a fully azimuth thruster at the bottom of the platform.

[0024] Furthermore, in the aforementioned semi-submersible offshore floating wind turbine installation platform, each side wall of the docking groove is provided with two hydraulic pins, which are respectively located above and below the hydraulic anti-collision device.

[0025] This invention innovatively proposes a semi-submersible offshore floating wind turbine installation platform. In the operating area of ​​the floating wind turbine, the platform can be combined with the floating wind turbine's buoyancy to form a floating structure, keeping them relatively stationary. This provides favorable conditions for wind turbine installation, thereby enabling the successful installation of the offshore floating wind turbine. This invention achieves the successful offshore installation of floating wind turbines. Attached Figure Description

[0026] Figure 1 This is a top view diagram of the wind turbine installation platform and the three-column wind turbine foundation;

[0027] Figure 2 This is a side view diagram of the wind turbine installation platform and the three-column wind turbine foundation;

[0028] Figure 3 This is an enlarged schematic diagram of the structure at the mating groove;

[0029] Figures 4-5 This is a schematic diagram of the connection process between the wind turbine installation platform and the three-column wind turbine foundation;

[0030] Figure 6 This is a schematic diagram of the structure of two hydraulic latches;

[0031] Among them, 1-1 floating body, 1-2-column, 1-3-deck box, 1-4-living quarters, 2-main crane, 3-full rotation thruster, 4-anti-collision rubber, 5-hydraulic anti-collision device, 6-hydraulic pin, 7-1-platform winch, 7-2-wind turbine floating body winch, 7-3-mooring cable, 8-wind turbine component yard, A-floating body, B-sea surface, C-wind turbine, D-column, α-angle between this platform and the floating wind turbine foundation. Detailed Implementation

[0032] The invention will be further described with reference to the accompanying drawings.

[0033] like Figure 1 , 2 The semi-submersible offshore floating wind turbine installation platform shown includes a wind turbine installation platform and a three-column wind turbine foundation. The three-column wind turbine foundation includes three offshore columns, which are connected by floating bodies and form an equilateral triangle.

[0034] The wind turbine installation platform has two boat-shaped floating bodies, with a deck box between them. The deck box is fixed above the boat-shaped floating bodies by the floating body columns. A docking groove is provided inward from the center of the end of the deck box between the two boat-shaped floating bodies. Hydraulic anti-collision devices are provided on both sides inside the docking groove. Anti-collision rubber is fixed to the bottom of the docking groove, and anti-collision rubber is fixed at the opening of the docking groove.

[0035] like Figure 3 , 6 As shown, a hydraulic anti-collision device and a hydraulic pin are provided on the inner sidewall of the docking groove. The hydraulic anti-collision device is fixed to the inner sidewall of the docking groove by a hydraulic cylinder. The cylinder body of the hydraulic cylinder is fixed to the inner sidewall of the docking groove, and the hydraulic rod of the hydraulic cylinder is fixedly connected to the anti-collision rubber. The hydraulic pin includes a locking hydraulic cylinder. The cylinder body of the locking hydraulic cylinder is fixed to the inner sidewall of the docking groove, and the front end of the locking hydraulic rod of the locking hydraulic cylinder is tapered.

[0036] Each side wall of the docking groove is equipped with two hydraulic pins, which are respectively located above and below the hydraulic anti-collision device. On both sides of one column of the three-column fan foundation, at positions corresponding to the hydraulic pins, there are symmetrical tapered grooves.

[0037] Two other columns are equipped with wind turbine floating winches, and platform winches are fixed on the deck box and on both sides of the docking groove. Mooring lines are installed between the wind turbine floating winches and the platform winches. The wind turbine installation platform is equipped with a main crane, a living quarters, and a wind turbine component storage yard, and a full-rotation thruster is installed at the bottom.

[0038] The wind turbine installation platform moves toward the three-column wind turbine foundation. The columns with conical grooves are inserted into the docking grooves and pressed against the fixed anti-collision devices. The platform winch raises and lowers the mooring cables, thereby pulling the columns at both ends of the three-column wind turbine foundation and causing them to rotate. The three-column wind turbine foundation is rotated from angle α to α=0°. After α=0°, the draft of the wind turbine installation platform is adjusted by adjusting the ballast water to align the locking hydraulic rods and conical grooves. The hydraulic anti-collision devices at both ends are activated to clamp the columns. After the columns are fixed, the hydraulic pins are activated, and the hydraulic rods of the locking hydraulic cylinders are inserted into the conical grooves for fixation.

[0039] After the floating body of the floating wind turbine is installed at its work site, this platform carries the wind turbine components to the vicinity of the floating wind turbine foundation, ready to carry out the wind turbine installation work.

[0040] The wind turbine installation platform uses its own azimuth thruster to gradually bring the recessed structure at the rear of the platform closer to the column with pin holes on the floating wind turbine's float, such as... Figure 4 , 5 As shown, the wind turbine mounting platform continues to move, while simultaneously controlling its own direction to ensure the mating groove contacts the column with the tapered hole. During this contact process, a collision may occur between the wind turbine mounting platform and the three-column wind turbine foundation. The anti-collision rubber and hydraulic anti-collision device (currently in a retracted state) absorb the energy generated by the collision, ensuring structural safety. At this point, the three-column wind turbine foundation and the wind turbine mounting platform are only in contact, not connected, and remain in relative motion.

[0041] The platform winch and the wind turbine float winch are connected by mooring cables. The platform winch winds can wind up and down the mooring cables, thereby pulling the columns at both ends of the wind turbine float and causing them to rotate. This allows the three-column wind turbine foundation to rotate from angle α to α=0°, providing conditions for the hydraulic pin to be inserted into the conical hole.

[0042] After α=0°, adjust the draft of the fan mounting platform by adjusting the ballast water to align the hydraulic pin and the conical hole.

[0043] Then, the hydraulic anti-collision device extends and clamps it from both sides of the three-column wind turbine foundation column. At this point, the wind turbine installation platform and the three-column wind turbine foundation are initially connected as one unit.

[0044] After the hydraulic anti-collision device clamps in place, the hydraulic pin extends from the deck box and inserts into the prefabricated pin hole of the floating wind turbine foundation, further securing the floating wind turbine foundation to the platform. At this point, the floating wind turbine foundation and the platform are connected by the hydraulic anti-collision device, the hydraulic pin, and the mooring device, forming a unified whole with identical motion response. That is, with the platform as the frame of reference, the floating wind turbine foundation exhibits no relative motion, and the two are relatively stationary. This provides a safe working environment for wind turbine installation.

[0045] Using the main crane, the wind turbine components in the wind turbine assembly yard are installed one by one onto the floating wind turbine foundation in sequence, completing the floating wind turbine installation operation. This concludes a complete floating wind turbine installation process.

Claims

1. A semi-submersible offshore floating wind turbine installation platform, characterized in that, It includes a wind turbine installation platform and a three-column wind turbine foundation. The wind turbine installation platform has two ship-shaped floating bodies, and a deck box is set between the two ship-shaped floating bodies. The deck box is fixed above the ship-shaped floating bodies by the floating body columns. A docking groove is set inward from the center of the end of the deck box between the two ship-shaped floating bodies. Hydraulic anti-collision devices are set on both sides inside the docking groove, and anti-collision rubber is fixed to the bottom of the docking groove. A hydraulic anti-collision device and a hydraulic pin are provided on the inner side wall of the docking groove. The hydraulic anti-collision device is fixed to the inner side wall of the docking groove by a hydraulic cylinder. The cylinder body of the hydraulic cylinder is fixed to the inner side wall of the docking groove, and the hydraulic rod of the hydraulic cylinder is fixedly connected to the anti-collision rubber. The hydraulic pin includes a locking hydraulic cylinder. The cylinder body of the locking hydraulic cylinder is fixed to the inner side wall of the docking groove, and the front end of the locking hydraulic rod of the locking hydraulic cylinder is tapered. The three-column wind turbine foundation has symmetrical conical grooves on both sides of one column, and wind turbine floating winches are fixed on the other two columns. Platform winches are fixed on the deck box and on both sides of the docking groove. Mooring cables are installed between the wind turbine floating winch and the platform winch. The hydraulic rod of the locking hydraulic cylinder is inserted into the conical groove for fixation.

2. The semi-submersible offshore floating wind turbine installation platform according to claim 1, characterized in that, Anti-collision rubber is fixed at the opening of the mating groove.

3. A semi-submersible offshore floating wind turbine installation platform according to claim 1, characterized in that, The three-pillar wind turbine foundation consists of three offshore pillars connected by floating structures, forming an equilateral triangle.

4. A semi-submersible offshore floating wind turbine installation platform according to claim 1, characterized in that, The wind turbine installation platform is equipped with a main crane, a living quarters, and a wind turbine component storage yard.

5. A semi-submersible offshore floating wind turbine installation platform according to claim 1, characterized in that, The bottom of the wind turbine mounting platform is equipped with a full-rotation thruster.

6. A semi-submersible offshore floating wind turbine installation platform according to claim 1, characterized in that, Each side wall of the mating groove is equipped with two hydraulic pins, which are respectively positioned above and below the hydraulic anti-collision device.

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