Construction method of negative pressure suction type pile cap for offshore complete installation of floating offshore wind turbine

Abstract

The application discloses a kind of offshore wind turbine offshore complete set with negative pressure suction type bearing platform construction method of floating type, comprising: three cables present triangular distribution to form the constraining force of the periphery of pedestal construction process.Three adjusting mechanisms in the pedestal are connected with the fixed column inserted into seabed through corresponding cable, three cables present triangular distribution to the stress of pedestal, so that the pedestal is not easy to be driven by sea wave and be displaced, avoid the need to be docked with floating body foundation when secondary salvage, solve the problem that mooring chain is easily driven by sea wave and displaced, resulting in the need for secondary salvage of mooring chain in later period to moor with floating body foundation.

Description

TECHNICAL FIELD

[0001] The application relates to a construction method of a negative pressure suction type pile cap for offshore integration of a floating offshore wind turbine, and belongs to the technical field of offshore wind power construction. BACKGROUND

[0002] After the floating body foundation of the floating offshore wind turbine is towed to the installation point, mooring force needs to be kept to maintain a certain stable state.

[0003] The existing mooring of the floating body foundation is disclosed in Chinese Patent No. CN216401698U, which adopts mooring chains to be connected with the floating body foundation. Although the mooring of the floating body foundation can be achieved, when the mooring chains are arranged in advance, two mooring chains are arranged on the side of the floating body foundation, and the mooring chains are easily displaced by sea waves, resulting in the problem that the mooring chains need to be salvaged again to be moored with the floating body foundation in the later period. SUMMARY

[0004] To solve the above technical problems, the application provides a construction method of a negative pressure suction type pile cap for offshore integration of a floating offshore wind turbine.

[0005] The application is achieved by the following technical solutions.

[0006] The application provides a construction method of a negative pressure suction type pile cap for offshore integration of a floating offshore wind turbine, which comprises a construction process in which three cables are arranged in a triangular shape to form a restraining force around a base.

[0007] The construction process is specifically as follows: a floating block is connected with a second guide pipe and a third guide pipe and abuts against the base through an abutting block, a cable is connected with a guide piece, a fixed column is firmly arranged on a seabed, the cable is connected with the fixed column, a valve on the second guide pipe is connected with a valve on a double-way water pump, a valve on the third guide pipe is connected with a pressure relief valve, a fourth guide pipe is started to guide water flow into the interior of the floating block, the buoyancy of the base is changed, a part of a guide groove is located below the sea surface, and a top surface of the base is located on the sea surface;

[0008] The worm is rotated by rotating the rotating disc, and then the worm wheel is rotated to drive the threaded rod to rotate. Under the limitation of the base, the guide piece moves up and down to drive the cable to move straight, and the three cables arranged in a triangular shape form a restraining force around the base, so that the base is horizontal.

[0009] The vacuum chuck is in contact with the bottom surface of the floating body foundation, a pipeline is used to connect the valve on the first guide pipe and the valve on the double-way water pump, the fourth guide pipe is started to drain water, and a negative pressure is generated in the vacuum chuck to firmly adsorb the floating body foundation on the base.

[0010] Three adjusting mechanisms and cables are further included, the adjusting mechanisms are circumferentially arranged in the base, three adjusting mechanisms are correspondingly connected with cables, and the top of the cables is fixedly connected with fixed columns inserted into the seabed and fixed.

[0011] The bottom surface of the base is a concave space, and the buoy is placed.

[0012] The top of the base is provided with a vacuum chuck, and the top of the base located outside the vacuum chuck is provided with a guide groove for guiding butt joint with the floating foundation.

[0013] The vacuum chuck is internally provided with a first conduit, one end of the first conduit is located in the vacuum chuck, and the other end of the first conduit is located outside the vacuum chuck and is communicated with a valve.

[0014] The second conduit and the third conduit are further included, and the second conduit and the third conduit are communicated with the hollow interior of the buoy and are both communicated with valves.

[0015] The fourth conduit is communicated with the buoy, and the fourth conduit is communicated with a bidirectional water pump.

[0016] The adjusting mechanism comprises a guide piece fixedly connected with the cable, and a sliding groove is arranged on the inner surface of the base and matched with the guide piece, so that the guide piece can only slide in the sliding groove on the inner surface of the base.

[0017] The threaded rod is screwed with the guide piece, and the threaded rod is only rotatably installed on the base through the limiting block.

[0018] The threaded rod is fixedly connected with a worm gear, the worm gear is engaged with a worm, and the end of the worm penetrating through the base is provided with a rotating disc.

[0019] The beneficial effects of the present application are that the three adjusting mechanisms in the base are connected with the fixed columns inserted into the seabed through corresponding cables, the three cables are distributed in a triangular shape to bear force on the base, so that the base is not easily displaced by sea waves, and the problem that the mooring chain is easily displaced by sea waves and needs to be salvaged twice for mooring with the floating foundation in the later period is solved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is a schematic view of the negative pressure suction type pile cap structure of the present application.

[0021] Fig. 2 It is a schematic view of the local structure of the present application.

[0022] Fig. 3 It is a schematic view of the abutting block structure of the present application.

[0023] Fig. 4 It is a schematic view of the adjusting mechanism structure of the present application.

[0024] In the figure: 1 - base; 2 - adjusting mechanism; 201 - threaded rod; 202 - limit block; 203 - worm gear; 204 - worm; 205 - rotating disc; 206 - guide; 3 - floating plate; 4 - cable; 5 - fixed column; 7 - guide groove; 8 - vacuum chuck; 9 - first conduit; 10 - floating block; 11 - second conduit; 12 - third conduit; 13 - two-way water pump; 14 - fourth conduit; 15 - valve; 16 - abutment. DETAILED DESCRIPTION

[0025] The technical solutions of the present application are further described below, but the scope of protection is not limited to the description.

[0026] As Figs. 1 to 4 shown.

[0027] A negative pressure suction type pile cap for offshore complete installation of a floating offshore wind turbine according to the present application comprises:

[0028] The base 1 has a recessed space at the bottom surface to accommodate the floating block 10. The floating block 10 is hollow inside. The base 1 is detachably connected and installed with an abutment block 16 at the bottom through bolts. The abutment block 16 abuts against the floating block 10 and is limited in the recessed space at the bottom surface of the base 1.

[0029] The base 1 is installed with adjusting mechanisms 2. Three adjusting mechanisms 2 are distributed and installed in the base 1 in a circumferential array. The three adjusting mechanisms 2 on the base 1 are each connected with a cable 4. The top of the cable 4 is fixedly connected with a fixed column 5 inserted into the seabed. The three cables 4 are distributed in a triangular shape at the outer periphery of the base 1.

[0030] The base 1 is installed with a vacuum chuck 8 at the top. The top of the base 1 at the outer periphery of the vacuum chuck 8 has a guide groove 7 for guiding and abutting against the floating foundation.

[0031] The vacuum chuck 8 is internally arranged with a first conduit 9. One end of the first conduit 9 is inside the vacuum chuck 8. One end of the first conduit 9 is externally connected and installed with a valve 15.

[0032] Three adjusting mechanisms 2 in the base 1 are connected with the fixed column 5 inserted into the seabed through corresponding cables 4, and the three cables 4 are distributed in a triangular shape to bear force on the base 1, so that the base 1 is not easily displaced by waves, and the problem that the mooring chain is easily displaced by waves, resulting in the need for secondary salvage of the mooring chain for mooring with the floating body foundation in the later period, is solved. After the floating body foundation contacts the vacuum chuck 8, the vacuum chuck 8 is internally connected with the first conduit 9 and the valve 15 to form negative pressure by vacuumizing and is adsorbed with the bottom of the floating body foundation to form support, at this time, the bottom of the floating body foundation is in surface contact with the vacuum chuck 8. The three vacuum chucks 8 of the three bases 1 are in surface contact with and adsorb the three corners of the floating body foundation.

[0033] The second conduit 11 and the third conduit 12 are in communication with the hollow interior of the floating block 10, and the second conduit 11 and the third conduit 12 are both connected with the valve 15.

[0034] The fourth conduit 14 is connected with the floating block 10, and the fourth conduit 14 is connected with the bidirectional water pump 13.

[0035] The base 1 is externally connected with the floating plate 3 through bolt fixation, and the floating plate 3 is arranged in a circular array on the outside of the base 1.

[0036] The adjusting mechanism 2 comprises a guide piece 206 fixedly connected with the cable 4, and the inner surface of the base 1 is provided with a sliding groove matched with the guide piece 206, so that the guide piece 206 can only slide in the sliding groove on the inner surface of the base 1.

[0037] The threaded rod 201 is screwed with the guide piece 206 through a threaded pair, and the threaded rod 201 can only be rotatably installed on the base 1 through the limiting block 202.

[0038] The threaded rod 201 is fixedly connected with the worm gear 203, the worm gear 203 is engaged with the worm 24, and the end of the worm 24 penetrating through the base 1 is provided with the rotating disc 205. The rotating disc 205 is rotated from the outside to rotate the worm gear 203, control the guide piece 206 to move with the cable 4, and realize the tension adjustment of the base 1.

[0039] The application discloses a negative pressure suction type pile cap construction method for offshore installation of a floating offshore wind turbine, which comprises:

[0040] The floating block 10 is connected with the second conduit 11 and the third conduit 12, then the abutting block 16 is fixed firmly by using the bolt, then the floating block 10 is arranged in the base 1, is pulled to the preset position, then the cable 4 is connected with the guide piece 206, the fixed column 5 is fixed firmly on the seabed at the preset position on the seabed, then the cable 4 is connected with the fixed column 5, then the valve 15 on the second conduit 11 is connected with the valve 15 on the bidirectional water pump 13, the valve 15 on the third conduit 12 is connected with the pressure relief valve, then the fourth conduit 14 is started to guide the water flow into the inside of the floating block 10, the buoyancy of the base 1 is changed, the partial of the guide groove 7 is located below the sea surface, the top surface of the base 1 is located on the sea surface, then the guide piece 206 is moved up and down under the limitation of the base 1 by rotating the rotating disc 205 to drive the worm 204 to rotate, then the worm wheel 203 is rotated to drive the threaded rod 201 to rotate, the cable 4 is moved straight under the movement of the guide piece 206, three cables 4 in triangular distribution form the restraint force on the periphery of the base 1, so that the base 1 is horizontal; then the floating foundation is pulled to the guide groove 7 by the ship to reach the vacuum chuck 8, the vacuum chuck 8 is in contact with the bottom surface of the floating foundation, then the valve 15 on the first conduit 9 is connected with the valve 15 on the bidirectional water pump 13 by using the pipeline, then the fourth conduit 14 is started to carry out the drainage operation, so that the negative pressure is generated in the vacuum chuck 8, the floating foundation is firmly adsorbed on the base 1, and is fixed firmly.

Claims

1. A construction method of a negative pressure suction type pile cap for offshore installation of a floating offshore wind turbine, characterized by, The construction process includes that three cables (4) are arranged in a triangular distribution to form a constraint force on the periphery of the base (1); The construction process specifically includes that the floating block (10) is connected with the second conduit (11) and the third conduit (12) and is abutted in the base (1) through the abutting block (16), the cable (4) is connected with the guide piece (206), the fixed column (5) is firmly arranged on the seabed, the cable (4) is connected with the fixed column (5), the valve on the second conduit (11) is connected with the valve on the bidirectional water pump (13), the valve on the third conduit (12) is connected with the pressure relief valve, the fourth conduit (14) is started to guide the water flow into the inside of the floating block (10), the buoyancy of the base (1) is changed, the partial guide groove (7) is located below the sea surface, and the top surface of the base (1) is located on the sea surface; The rotating disc (205) drives the worm to rotate, thereby driving the worm to rotate, and then driving the worm wheel (203) to rotate, and driving the threaded rod (201) to rotate, under the limitation of the base (1), the guide piece (206) moves up and down, thereby driving the cable (4) to move straight, three cables (4) arranged in a triangular distribution form a constraint force on the periphery of the base (1), and the base (1) is horizontal. The vacuum chuck (8) is in contact with the bottom surface of the floating foundation, the valve on the first conduit (9) is connected with the valve on the bidirectional water pump (13) through the pipeline, the fourth conduit (14) is started to drain water, and the negative pressure is generated in the vacuum chuck (8) to firmly adsorb the floating foundation on the base (1); The bottom surface of the base (1) is a recessed space, and the floating block (10) is arranged in the recessed space; The second conduit (11) and the third conduit (12) are in communication with the inside of the floating block (10), and the second conduit (11) and the third conduit (12) are both connected with valves; the floating block (10) is connected with the fourth conduit (14), and the fourth conduit (14) is connected with the bidirectional water pump (13); The adjusting mechanism (2) further includes the guide piece (206) fixedly connected with the cable (4), and the inner surface of the base (1) is provided with a sliding groove matched with the guide piece (206), so that the guide piece (206) can only slide in the sliding groove on the inner surface of the base (1); The threaded rod (201) is screwed with the guide piece (206), and the threaded rod (201) can only be rotatably arranged on the base (1) through the limiting block (202) up and down; The threaded rod (201) is fixedly connected with the worm wheel (203), the worm wheel (203) is engaged with the worm, and the end portion of the worm penetrating through the base (1) is provided with the rotating disc (205).

2. The negative pressure suction type pile cap construction method for offshore installation of a floating offshore wind turbine according to claim 1, characterized in that, The adjusting mechanism (2) and the cable (4) are at least three, the adjusting mechanism (2) is arranged in the base (1) in a circumferential array, the three adjusting mechanisms (2) are all connected with the cable (4), and the top of the cable (4) is fixedly connected with the fixed column (5) inserted into the seabed; three cables (4) arranged in a triangular distribution form a constraint force on the periphery of the base (1).

3. The method according to claim 2, wherein the method is characterized by: The base (1) is provided with the vacuum chuck (8) on the top thereof; the base (1) is provided with the guide groove (7) on the top thereof and outside the vacuum chuck (8), and the guide groove (7) guides and butts against the floating foundation.

4. The negative pressure suction type pile cap construction method for offshore installation of a floating offshore wind turbine according to claim 3, characterized in that: The vacuum chuck (8) is internally arranged with a first conduit (9), one end of the first conduit (9) is in the vacuum chuck (8), and one end of the first conduit (9) is externally communicated with the vacuum chuck (8) and is provided with a valve.

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