Negative pressure bearing platform for floating type offshore wind power floating body foundation construction

Abstract

The utility model discloses a negative pressure bearing platform for floating type offshore wind power floating body foundation construction, which is characterized in that after a floating body foundation of a floating type unit is in butt joint contact with a rubber wrapping layer of a suction bearing platform, elastic sealing contact occurs, an air compressor vacuumizes air in a barrel bottom through a pressure control valve, and a negative pressure is generated; when the butt joint position of the floating body foundation and the suction bearing platform needs to be adjusted, air is input into the barrel bottom through the pressure control valve to form slight high pressure, and the floating body foundation is only adjusted through gravity and is not affected by magnetic suction force. The problem that the alignment process is inconvenient to adjust due to the influence of magnetic attraction force after the floating body foundation is in butt joint with the bearing platform is solved.

Description

Technical Field

[0001] This utility model relates to a negative pressure bearing platform for the construction of floating offshore wind turbine foundations, belonging to the field of offshore wind power construction technology. Background Technology

[0002] In offshore construction environments, when assembling wind turbine components onto a floating foundation, it is essential to ensure the stability of the floating foundation at sea. Existing technologies for stabilizing floating foundations are described in Chinese Patent Publication No. CN218877530U. Although the floating foundation can maintain a stable position through the magnetic attraction of the magnet blocks on the foundation, the alignment process is inconvenient due to the magnetic attraction after docking with the foundation. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a negative pressure bearing platform for the construction of floating offshore wind power floating body foundation.

[0004] This utility model is achieved through the following technical solution.

[0005] This utility model provides a negative pressure bearing platform for the construction of a floating offshore wind turbine foundation, comprising:

[0006] Suction platform;

[0007] The suction support includes a guide frame inserted into the seabed bearing layer below the mud surface. A barrel bottom is fixed to the top of the guide frame, and a barrel wall is sealed and fixed to the barrel bottom. The barrel wall and the barrel bottom form an upwardly concave suction cylinder. The barrel wall has a sealed water inlet and outlet interface, and a pressure control valve is on the water inlet and outlet interface.

[0008] The inner wall of the barrel has annular ribs and reinforcing rings that serve to strengthen it.

[0009] The top of the barrel wall is fixed with an internal circular tube support, which supports a rubber wrapping layer that provides an elastic seal. The contact layer on the top surface of the rubber wrapping layer is flat.

[0010] A floating turbine unit is installed on the suction jack. The floating turbine unit includes a floating foundation, a tower installed on the floating foundation, and a main unit installed on the tower.

[0011] It also includes mooring piles inserted into the seabed bearing layer below the mud surface and the mud surface itself. The mooring piles are moored to the floating body foundation via mooring cables.

[0012] It also includes a temporary pier located on the side of the floating unit, with the bottom of the temporary pier inserted into the seabed bearing layer below the mud surface and the top of the temporary pier exposed above the sea surface.

[0013] The beneficial effects of this utility model are as follows: After the floating foundation of the floating unit comes into contact with the rubber wrapping layer of the suction platform, an elastic sealing contact occurs. The air compressor evacuates the air inside the bottom of the tank through the pressure control valve, so that the floating foundation of the floating unit maintains a stable position on the suction platform. When it is necessary to adjust the docking position of the floating foundation and the suction platform, air is introduced into the bottom of the tank through the pressure control valve to form a slight high pressure. The floating foundation is only adjusted by gravity and is not affected by magnetic attraction. This solves the problem that the floating foundation is inconvenient to adjust during the alignment process due to the influence of magnetic attraction after docking with the platform. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the distribution of this utility model;

[0015] Figure 2 This is a schematic diagram showing the connection distribution of the barrel wall, barrel bottom, and rubber wrapping layer of this utility model;

[0016] In the diagram: 11-jacket frame; 12-inlet / outlet interface; 13-pressure control valve; 14-bucket wall; 15-bucket bottom; 16-annular rib; 17-reinforcing ring; 18-internal circular pipe support; 191-rubber wrapping layer; 192-contact layer; 21-floating foundation; 22-tower; 23-main engine; 3-temporary dock; 4-sea surface; 51-mooring pile; 52-mooring cable; 6-mud surface. Detailed Implementation

[0017] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0018] like Figures 1 to 2 As shown.

[0019] This application discloses a negative pressure bearing platform for the construction of a floating offshore wind turbine foundation, comprising:

[0020] The suction platform can generate negative pressure inside, and the suction platform consists of three units arranged in a triangular pattern. A floating unit is installed on the suction platform. The floating unit includes a floating base 21, a tower 22 installed on the floating base 21, and a main unit 23 installed on the tower 22.

[0021] The suction support includes a guide frame 11 inserted into the seabed bearing layer below the mud surface 6. A barrel bottom 15 is fixed to the top of the guide frame 11. The barrel bottom 15 is sealed and fixedly connected to a barrel wall 14. The barrel wall 14 and the barrel bottom 15 form an upwardly concave suction cylinder. A water inlet and outlet interface 12 is sealed and connected to the barrel wall 14. A pressure control valve 13 is provided on the water inlet and outlet interface 12. The inner wall surface of the barrel wall 14 has annular ribs 16 and reinforcing rings 17 for reinforcement.

[0022] The top of the barrel wall 14 has an internal circular tube support 18, and the internal circular tube support 18 has a rubber wrapping layer 191 that plays an elastic sealing role. The contact layer 192 on the top surface of the rubber wrapping layer 191 is flat, and the floating body base 21 comes into contact with the contact layer 192 on the top surface of the rubber wrapping layer 191 to achieve elastic sealing contact.

[0023] After the floating base 21 of the floating unit comes into contact with the rubber wrapping layer 191 of the suction platform, an elastic seal is formed. The air compressor evacuates the air inside the bottom 15 of the tank through the pressure control valve 13, so that the floating base 21 of the floating unit maintains a stable position on the suction platform. When it is necessary to adjust the docking position of the floating base 21 and the suction platform, air is introduced into the bottom 15 of the tank through the pressure control valve 13 to form a slight high pressure. The floating base 21 is only adjusted by gravity and is not affected by magnetic attraction, which solves the problem that the floating base is inconvenient to adjust during the alignment process due to the influence of magnetic attraction after docking with the platform.

[0024] It also includes mooring piles 51 inserted into the seabed bearing layer below the mud surface 6, and the mooring piles 51 are moored to the floating body foundation 21 via mooring cables 52. There are three mooring piles 51, corresponding to three suction piers.

[0025] It also includes a temporary pier 3 located on the side of the floating unit, which is constructed using an upgradeable offshore platform. The bottom of the temporary pier 3 is inserted into the seabed bearing layer below the mud surface 6, and the top of the temporary pier 3 is exposed above the sea surface 4.

[0026] This application discloses a construction method for a negative pressure bearing platform used in the construction of a floating offshore wind turbine foundation, comprising the following steps:

[0027] Step 1: The temporary dock 3 is transported by self-propelled or towed to a near-shore water depth area of ​​20-30m. Alternatively, a fixed hoisting platform can be installed in the near-shore water depth area of ​​20-30m to serve as the temporary dock 3. After the platform legs are lowered to the seabed bearing layer below the mud surface 6, the temporary dock 3 is lifted as a whole to a certain height above the sea surface 4.

[0028] Step 2: Drive mooring piles 51 deep into the seabed bearing layer below the mud surface 6, and then install mooring cables 52, with the other end of the mooring cables 52 resting on the deck of the temporary pier 3.

[0029] Step 3: Install the lower structure of the suction pier, ensuring that the installation location can be covered by the hoisting capacity of the temporary wharf 3; hoist and place the jacket frame 11, and drive piles to fix the jacket frame 11 to the bottom, extending into the seabed bearing layer below the mud surface 6.

[0030] Step 4: Fix the bucket bottoms 15 on the guide frame 11, with the three bucket bottoms positioned directly above the three guide frames 11.

[0031] Step 5: Tow the floating base 21 to the top of the suction cylinder structure, adjust the three columns of the floating base 21 and place them directly above the contact layer 192 of the rubber structure 19, adjust the ballast water of the floating base 21 so that the floating base 21 moves vertically downward until it is in stable and sealed contact with the contact surface 192. At this time, the contact surface 192 bears a certain pressure.

[0032] Step 6: The other end of the mooring cable 52 is hoisted from the temporary dock 3 to the floating body foundation. Then, the connecting shackle of the mooring cable 52 is fixedly connected to the lifting lug of the floating body foundation 21. The length of the mooring cable 52 is adjusted using a tensioner to tighten and fix the floating body foundation 21 and the mooring pile 51, thereby restricting the overall horizontal movement of the floating body foundation 21.

[0033] Step 7: Open the pressure control valve 13 and start the suction cylinder water pump connected to the pressure control valve 13 to draw a certain amount of water out of the suction cylinder structure barrel wall 14. After creating a negative pressure inside the suction cylinder structure barrel wall 14, close the pressure control valve 13 to ensure that the lower surface of the floating body base 21 is tightly attached to the rubber structure 19, restricting the vertical movement of the floating body base 21 as a whole and maintaining a stable position support.

[0034] Step 8: Use temporary dock 3 to hoist the wind turbine tower 22, main unit 23, impeller and other wind turbine equipment in sequence.

[0035] Step 9: Open pressure control valve 13 to release the negative pressure inside the suction cylinder structure and remove the vertical movement restriction of the floating unit.

[0036] Step 10: Disconnect all shackles at the movable end of mooring cable 52 to release the horizontal movement restrictions of the floating generator unit. Hoist the movable end of mooring cable 52 to the temporary pier deck 3 for storage. Before dismantling mooring cable 52, the towing vessel is in position, and towing and lashing work is carried out simultaneously during the dismantling of mooring cable 52.

[0037] Step 11: Adjust the ballast water of the floating body foundation 21 so that the floating body foundation 21 floats up and separates from the contact surface 192 by a certain distance.

[0038] Step 12: Use a tugboat to tow the floating turbine to the wind farm design location for installation.

[0039] Working principle: During use, the floating foundation 21 is towed to the contact layer 192 of the suction platform, aligning the three columns of the floating foundation 21 with the three contact surfaces 192 respectively. Then, the ballast water of the floating foundation 21 is adjusted to ensure stable and sealed contact between its bottom and the contact surfaces 192. At this time, the contact surfaces 192 bear a certain pressure. Then, the connecting shackle of the mooring cable 52 is fixedly connected to the lifting lug of the floating foundation 21. The length of the mooring cable 52 is adjusted to tension and fix the floating foundation 21 and the mooring pile 51. Then, a certain amount of water is pumped out of the wall 14 of the suction cylinder structure to create a negative pressure inside the wall 14 of the suction cylinder structure, which stably adsorbs the floating foundation 21 onto the suction platform. Finally, the tower 22, the main unit 23 and other wind turbine equipment are hoisted using the temporary dock 3.

Claims

1. A negative pressure bearing platform for the construction of a floating offshore wind turbine foundation, characterized in that, include: Suction platform; The suction support includes a guide frame (11) inserted into the seabed bearing layer below the mud surface (6). A barrel bottom (15) is fixed to the top of the guide frame (11). A barrel wall (14) is sealed and fixed to the barrel bottom (15). The barrel wall (14) and the barrel bottom (15) form an upwardly concave suction cylinder. A water inlet and outlet interface (12) is sealed and connected to the barrel wall (14). A pressure control valve (13) is on the water inlet and outlet interface (12).

2. The negative pressure bearing platform for the construction of floating offshore wind turbine foundations as described in claim 1, characterized in that: The inner wall of the barrel (14) has annular ribs (16) and reinforcing rings (17) that serve to strengthen it.

3. The negative pressure bearing platform for the construction of floating offshore wind turbine foundations as described in claim 1, characterized in that: The top of the barrel wall (14) is fixed with an internal circular tube support (18), which has a rubber wrapping layer (191) that provides elastic sealing. The contact layer (192) on the top surface of the rubber wrapping layer (191) is flat.

4. The negative pressure bearing platform for the construction of floating offshore wind turbine foundations as described in claim 1, characterized in that: A floating unit is installed on the suction support platform. The floating unit includes a floating foundation (21), a tower (22) installed on the floating foundation (21), and a main unit (23) installed on the tower (22).

5. The negative pressure bearing platform for the construction of floating offshore wind turbine foundations as described in claim 1, characterized in that: It also includes a mooring pile (51) inserted into the seabed bearing layer below the mud surface (6) and the mud surface (6), and the mooring pile (51) is moored to the floating body foundation (21) by a mooring cable (52).

6. The negative pressure bearing platform for the construction of floating offshore wind turbine foundation as described in claim 1, characterized in that: It also includes a temporary dock (3) located on the side of the floating unit, with the bottom of the temporary dock (3) inserted into the seabed bearing layer below the mud surface (6) and the top of the temporary dock (3) exposed above the sea surface (4).

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