Installation method of semi-submersible offshore floating fan

Abstract

A semi-submersible offshore floating type fan installation method comprises a fan installation platform and a three-stand-column type fan foundation, the fan installation platform 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 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] The present invention belongs to the field of offshore ship design and construction, and particularly relates to a method for installing a semi-submersible offshore floating wind turbine. Background Art

[0002] In deep and far-reaching sea areas, due to the relatively large water depth, traditional pile-fixed wind turbines can no longer meet the requirements of environmental loads. Floating wind turbines are the best choice for wind turbines in deep and far-reaching sea areas.

[0003] Floating wind turbines are mainly divided into two parts, namely the wind turbine and the floating body. When installing the wind turbine on the floating body, there are two installation methods. One is onshore installation, and the other is offshore installation.

[0004] For onshore installation of floating wind turbines, that is, installing the wind turbine on the floating body at the dock and then towing the whole to the operation sea area of the floating wind turbine. Currently, foreign floating wind turbine projects in Norway, France, the UK, etc. all adopt the onshore installation method, installing the floating wind turbine at the dock and then towing it to the operation sea area. The first domestic floating wind turbine built by China Three Gorges Corporation also adopts the onshore installation method, installing the wind turbine at the dock and then towing it to the operation sea area.

[0005] The problems with onshore installation are as follows: The floating body of the floating wind turbine has a large draft, so it requires a very deep water depth at the dock for installing the floating wind turbine. Usually, a water depth of more than ten meters is required, and there are few docks in China that meet the requirements; Floating wind turbines are applied in deep and far-reaching sea areas. After onshore installation, the towing distance is relatively long. At the same time, the center of gravity of the floating wind turbine is relatively high, and the environmental conditions during towing are relatively demanding. It requires a long period of mild weather to tow, so the towing window period is short and the risk is relatively high.

[0006] For offshore installation of floating wind turbines, that is, first towing the floating body to the operation sea area and then installing the wind turbine on the floating body.

[0007] The advantages of the offshore installation method are very obvious: High installation efficiency. The wind turbine installation platform can carry and install multiple sets of wind turbines at one time, meeting the requirements for wind turbine installation in large offshore wind farms; The installation location is in the actual operation sea area of the floating wind turbine, without relying on docks with a large water depth; Avoid the overall towing of the floating wind turbine with a high center of gravity. Only tow the floating body of the floating wind turbine, increasing the safety and efficiency of towing.

[0008] However, offshore installation has not been actually applied yet, because its difficulty lies in that: both the floating body of the floating wind turbine and the wind turbine installation platform are independent floating structures. Their motion responses in the sea are different, which results in relative motion between them. That is, taking one of them as a reference, the other is constantly moving, and there is no stable installation environment. Therefore, it is very difficult to install the floating wind turbine on the floating wind turbine foundation.

[0009] Therefore, there is an urgent need for a wind turbine installation platform that can perform wind turbine installation operations in the operation sea area of the floating wind turbine. Summary of the Invention

[0010] To solve the above problems, the present invention provides a semi-submersible offshore floating wind turbine installation method, and the technical solution adopted is as follows: A semi-submersible offshore floating wind turbine installation method includes a wind turbine installation platform and a three-column wind turbine foundation. The wind turbine installation platform has two ship-shaped floating bodies. A deck box is arranged between the two ship-shaped floating bodies. The deck box is fixed above the ship-shaped floating bodies through floating body columns. In the middle of the two ship-shaped floating bodies and at the center of the end of the deck box, a docking groove is arranged inward. Hydraulic anti-collision devices are arranged on both sides inside the docking groove, and anti-collision rubber is fixed at the bottom of the docking groove.

[0011] Hydraulic anti-collision devices and hydraulic pins are arranged on the inner side walls of the docking groove. The hydraulic anti-collision devices are fixed on the inner side walls of the docking groove through hydraulic cylinders. The cylinder body of the hydraulic cylinder is fixed on the inner side wall of the docking groove, and the hydraulic rod of the hydraulic cylinder is fixedly connected with the anti-collision rubber. The hydraulic pin includes a locking hydraulic cylinder. The cylinder body of the locking hydraulic cylinder is fixed on the inner side wall of the docking groove, and the front end of the locking hydraulic rod of the locking hydraulic cylinder is conical.

[0012] On both sides of one column of the three-column wind turbine foundation, conical grooves are symmetrically opened. Wind turbine floating body winches are fixed on the other two columns. Platform winches are fixed on the deck box and beside the docking groove. Mooring cables are arranged between the wind turbine floating body winches and the platform winches.

[0013] The wind turbine installation platform moves towards the three-column wind turbine foundation. The column with the conical groove is inserted into the docking groove and abuts against the fixed anti-collision device. The platform winch winds and unwinds the mooring cable, thereby pulling the columns at both ends of the three-column wind turbine foundation to rotate it until the three-column wind turbine foundation rotates from the α angle 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 rod and the conical groove. The hydraulic anti-collision devices at both ends are started to clamp the column. After the column is fixed, the hydraulic pin is started, and the hydraulic rod of the locking hydraulic cylinder is inserted into the conical groove for fixation.

[0014] In the above-mentioned semi-submersible offshore floating wind turbine installation method, further, anti-collision rubber is fixed at the opening of the docking groove.

[0015] The above-mentioned semi-submersible offshore floating wind turbine installation method, further, the three-column wind turbine foundation includes three offshore columns, which are connected by a floating body, and the whole is in an equilateral triangle shape.

[0016] The above-mentioned semi-submersible offshore floating wind turbine installation method, further, a main crane, a living building and a wind turbine component yard are arranged on the wind turbine installation platform.

[0017] The above-mentioned semi-submersible offshore floating wind turbine installation method, further, a full-rotation thruster is arranged at the bottom of the wind turbine installation platform.

[0018] The above-mentioned semi-submersible offshore floating wind turbine installation method, further, two hydraulic pins are arranged on each side wall of the docking groove, and the two hydraulic pins are respectively arranged above and below the hydraulic anti-collision device.

[0019] The present invention innovatively proposes a semi-submersible offshore floating wind turbine installation method, which can combine the floating body of the floating wind turbine with the platform of the present invention into a floating structure in the operation sea area of the floating wind turbine, making the two relatively stationary, so as to provide good conditions for the wind turbine installation, and then complete the installation operation of the offshore floating wind turbine. The offshore installation operation of the floating wind turbine is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic top view structure diagram of the wind turbine installation platform and the three-column wind turbine foundation; Figure 2 It is a schematic side view structure diagram of the wind turbine installation platform and the three-column wind turbine foundation; Figure 3 It is an enlarged structure diagram of the docking groove; Figures 4 - 5 It is a schematic diagram of the docking process of the wind turbine installation platform and the three-column wind turbine foundation; Figure 6 It is a schematic structure diagram of two hydraulic pins; Wherein, 1-1 floating body, 1-2 column, 1-3 deck box, 1-4 living building, 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 the present platform and the floating wind turbine foundation. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The present invention will be further described in conjunction with the accompanying drawings.

[0022] As Figure 1 、 2A semi-submersible offshore floating wind turbine installation method is shown, including 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 a floating body and are in an equilateral triangle as a whole.

[0023] The wind turbine installation platform has two ship-shaped floating bodies. There is a deck box between the two ship-shaped floating bodies. The deck box is fixed above the ship-shaped floating bodies through floating body columns. In the middle of the two ship-shaped floating bodies and at the center of the end of the deck box, a docking groove is arranged inward. Hydraulic anti-collision devices are arranged on both sides inside the docking groove. Anti-collision rubber is fixed on the bottom of the docking groove, and anti-collision rubber is fixed at the opening of the docking groove.

[0024] As Figure 3 、 6 As shown, hydraulic anti-collision devices and hydraulic pins are arranged on the inner side wall of the docking groove. The hydraulic anti-collision devices are fixed on the inner side wall of the docking groove through hydraulic cylinders. The cylinder body of the hydraulic cylinder is fixed on the inner side wall of the docking groove, and the hydraulic rod of the hydraulic cylinder is fixedly connected with the anti-collision rubber; the hydraulic pin includes a locking hydraulic cylinder. The cylinder body of the locking hydraulic cylinder is fixed on the inner side wall of the docking groove, and the front end of the locking hydraulic rod of the locking hydraulic cylinder is conical.

[0025] Two hydraulic pins are arranged on each side wall of the docking groove. The two hydraulic pins are respectively arranged above and below the hydraulic anti-collision device. On both sides of one column of the three-column wind turbine foundation, at positions corresponding to the hydraulic pins, conical grooves are symmetrically opened.

[0026] Wind turbine floating body winches are fixed on the other two columns. Platform winches are fixed on the deck box and beside the docking groove. Mooring cables are arranged between the wind turbine floating body winches and the platform winches. A main crane, a living building and a wind turbine component yard are arranged on the wind turbine installation platform, and a full-rotation thruster is arranged at the bottom.

[0027] The wind turbine installation platform moves towards the three-column wind turbine foundation. The column with a conical groove is inserted into the docking groove and abuts against the fixed anti-collision device. The platform winch winds and unwinds the mooring cable, thereby pulling the columns at both ends of the three-column wind turbine foundation to rotate until the three-column wind turbine foundation rotates 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 rod and the conical groove. Start the hydraulic anti-collision devices at both ends to clamp the column. After the column is fixed, start the hydraulic pin, and the hydraulic rod of the locking hydraulic cylinder is inserted into the conical groove for fixation.

[0028] When the floating body of the floating wind turbine is installed at its operation site, this platform carries the wind turbine components and sails to the vicinity of the floating wind turbine foundation to prepare for the wind turbine installation operation.

[0029] The wind turbine installation platform uses its own full-rotation propeller to gradually move the recessed structure at the tail of the platform closer to the column with the pin hole on the floating wind turbine float. Figure 4 , 5 As shown, the fan installation platform continues to move, and at the same time controls its own direction so that the docking groove contacts the column with the tapered hole. During the contact process, there may be a collision between the fan installation platform and the three-column fan foundation. The anti-collision rubber and hydraulic anti-collision device (in the retracted state at this time) can absorb the energy generated by the collision to ensure the safety of the structure. At this time, the three-column fan foundation and the fan installation platform are only in contact, not connected, and the two are still in a relative motion state.

[0030] The platform winch and the wind turbine float winch are connected by mooring cables. The platform winch retracts and releases the mooring cables, thereby pulling the columns at both ends of the wind turbine float to rotate them, so that the three-column wind turbine foundation rotates from angle α to α=0°, providing conditions for the hydraulic pin to be inserted into the tapered hole.

[0031] After α=0°, the draft of the fan installation platform is adjusted by adjusting the ballast water to align the hydraulic pin and the tapered hole.

[0032] After that, the hydraulic anti-collision device extends out and clamps the three-column fan foundation columns on both sides. At this time, the fan installation platform and the three-column fan foundation are initially connected as one.

[0033] After the hydraulic anti-collision device is clamped, the hydraulic pin extends from the deck box and is inserted into the prefabricated pin hole of the floating wind turbine foundation, further fixing the floating wind turbine foundation and the platform together. At this time, the floating wind turbine foundation and the platform are connected by the hydraulic anti-collision device, the hydraulic pin and the mooring device. The floating wind turbine foundation and the platform form a union with the same motion response, that is, with the platform as a reference, the floating wind turbine foundation has no relative motion, and the two are relatively static. It provides a safe working environment for wind turbine installation.

[0034] Using the main crane, the wind turbine components in the wind turbine assembly yard are installed one by one on the floating wind turbine foundation in order to complete the floating wind turbine installation operation. At this point, a complete floating wind turbine installation process is completed.

Claims

1. A method for installing a semi-submersible offshore floating wind turbine, 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. A deck box is arranged between the two ship-shaped floating bodies. The deck box is fixed on the top of the ship-shaped floating bodies through floating body columns. A docking groove is arranged inwardly from the center of the deck box end between the two ship-shaped floating bodies. Hydraulic anti-collision devices are arranged on both sides of the docking groove. Anti-collision rubber is fixed on the inner bottom of the docking groove. A hydraulic anti-collision device and a hydraulic latch are arranged on the inner side wall of the docking groove. The hydraulic anti-collision device is fixed on the inner side wall of the docking groove through a hydraulic cylinder. The cylinder body of the hydraulic cylinder is fixed on the inner side wall of the docking groove. The hydraulic rod of the hydraulic cylinder is fixedly connected with the anti-collision rubber. The hydraulic latch comprises a locking hydraulic cylinder. The cylinder body of the locking hydraulic cylinder is fixed on the inner side wall of the docking groove. The front end of the locking hydraulic rod of the locking hydraulic cylinder is conical. A column of the three-column wind turbine foundation has conical grooves symmetrically opened on both sides, and wind turbine floating body winches are fixed on the other two columns. Platform winches are fixed on the deck box and on both sides of the docking grooves, and mooring cables are arranged between the wind turbine floating body winches and the platform winches; The fan installation platform moves toward the three-column fan foundation, and the column with the tapered groove is inserted into the docking groove and rests on the fixed anti-collision device. The platform winch retracts and releases the mooring rope, thereby pulling the columns at both ends of the three-column fan foundation to rotate the three-column fan foundation from angle α to α=0°. After α=0°, the draft of the fan installation platform is adjusted by adjusting the ballast water, so that the locking hydraulic rod and the tapered groove are aligned, and the hydraulic anti-collision devices at both ends are started to clamp the column. After the column is fixed, the hydraulic latch is started, and the hydraulic rod of the locking hydraulic cylinder is inserted into the tapered groove and fixed.

2. A method for installing a semi-submersible offshore floating wind turbine according to claim 1, characterized in that: An anti-collision rubber is fixed at the opening of the docking groove.

3. A method for installing a semi-submersible offshore floating wind turbine according to claim 1, characterized in that: The three-column wind turbine foundation includes three offshore columns, which are connected by floating bodies and form an equilateral triangle as a whole.

4. A method for installing a semi-submersible offshore floating wind turbine according to claim 1, characterized in that: The fan installation platform is equipped with a main crane, living building and fan component yard.

5. A method for installing a semi-submersible offshore floating wind turbine according to claim 1, characterized in that: A full-rotation propeller is arranged at the bottom of the fan installation platform.

6. A method for installing a semi-submersible offshore floating wind turbine according to claim 1, characterized in that: Each side wall of the docking groove is provided with two hydraulic latches, and the two hydraulic latches are respectively arranged above and below the hydraulic anti-collision device.

Images