Offshore wind turbine sinking installation device and offshore wind turbine sinking installation method

Abstract

The invention discloses an offshore wind turbine sinking installation device and an offshore wind turbine sinking installation method.The offshore wind turbine sinking installation device is used for conducting sinking installation on a barrel type foundation, the barrel type foundation comprises a base and a tower barrel, and a plurality of first lifting lugs are further distributed at the upper end of the base; the offshore wind turbine sinking installation device comprises an installation ship and an installation floating cushion. The installation ship is provided with a placing space and a plurality of cranes, a plurality of fixed ends of the plurality of cranes are correspondingly fixed on the plurality of first lifting lugs, the installation ship arranges the plurality of positioning anchors at the lower end of the placing space through the anchoring system, and each positioning anchor is provided with a winch; the mounting floating pad is movably arranged on the base in a sleeving mode, a ballast tank is arranged in the mounting floating pad, an air bag is further arranged on the inner side of the mounting floating pad, a plurality of second lifting lugs are distributed on the outer side of the mounting floating pad, and the fixed end of the winch is fixed to the second lifting lugs. According to the technical scheme, the stability of the barrel type foundation in the sinking installation process can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power, and in particular to an offshore wind turbine sinking and installation device. Background Art

[0002] Wind energy resources are clean and renewable energy. Wind power generation is one of the power generation methods in the new energy field with mature technology, the best scale development conditions and commercial development prospects. As wind power technology matures, the capacity of single units continues to increase, and the cost of power generation is greatly reduced, offshore wind power has become a new field of wind power development with great potential, showing broad development prospects.

[0003] The cylindrical foundation of offshore wind power is a basic structure used for offshore wind turbines. It is usually composed of a large cylindrical structure, including a base at the bottom and a tower column at the top. It is installed on the seabed to provide stable support for the towering wind turbines and to reduce the various loads on the wind turbines.

[0004] When installing a barrel foundation at sea, its verticality, plane position and other parameters must be controlled extremely accurately. The offshore construction environment is complex, especially in the installation environment with a deep seabed, where factors such as wind and waves have a great impact. Even a small installation deviation may have a significant impact on the subsequent stress performance of the entire foundation. If the verticality deviation is too large, eccentric stress will occur when it is subjected to the horizontal force of the ocean, which may cause the barrel foundation to capsize. Summary of the invention

[0005] The main purpose of the present invention is to propose an offshore wind turbine sinking and installation device, aiming to improve the stability of the barrel foundation during the sinking and installation process.

[0006] To achieve the above-mentioned purpose, the present invention provides an offshore wind turbine sinking and installation device, which is used to sink and install a barrel foundation. The barrel foundation includes a base and a tower, the tower is vertically arranged at the upper end of the base, and a plurality of first lifting ears are distributed at the upper end of the base. The offshore wind turbine sinking and installation device includes:

[0007] The installation vessel is provided with a placement space, the placement space is used for placing the barrel foundation before sinking, the installation vessel is provided with a plurality of cranes, and the plurality of cranes are evenly arranged around the placement space, a plurality of fixed ends of the plurality of cranes are correspondingly fixed to a plurality of the first lifting ears, the installation vessel is provided with an anchoring system, the anchoring system arranges a plurality of positioning anchors at the lower end of the placement space, and each positioning anchor is provided with a winch; and

[0008] The mounting floating pad is annular in shape and can be movably mounted on the base. A ballast tank is provided inside the mounting floating pad, and the ballast tank is connected to a ventilation device and an injection device. There is also an air bag on the inner side of the mounting floating pad, and the air bag is connected to an air valve. After the air bag is inflated, it abuts against the base to relatively fix the mounting floating pad and the base. A plurality of second lifting ears are distributed on the outer side of the mounting floating pad, and the fixed end of the winch is fixed to the second lifting ear.

[0009] Optionally, the mounting floating pad is provided with a plurality of movable first limit plates, the first limit plates having a limit state and an avoidance state. In the limit state, the first limit plates are at least partially located at the lower end of the cavity of the mounting floating pad. In the avoidance state, the first limit plates are located on the peripheral side of the mounting floating pad and spaced apart from the lower end of the mounting floating pad in the up and down directions.

[0010] Optionally, a negative pressure cavity is provided at the lower end of the base, a central negative pressure chamber is provided at the center of the negative pressure cavity, a plurality of peripheral negative pressure chambers are distributed around the central negative pressure chamber, each adjacent two peripheral negative pressure chambers are separated by a partition, and each of the first limiting plates is correspondingly arranged under one of the partitions.

[0011] Optionally, the mounting floating pad is provided with a plurality of movable second limit plates, the length of the second limit plates being smaller than the length of the first limit plates, and a second limit plate is provided between any two adjacent first limit plates. In the limiting state, the second limit plate at least partially abuts against the periphery of the peripheral negative pressure bin, and after the first limit plate is fully moved to the avoidance state, the second limit plate moves to a position located on the peripheral side of the mounting floating pad, and is spaced apart from the lower end of the mounting floating pad in the up and down directions.

[0012] Optionally, the installation floating pad includes at least two installation segments, each of the installation segments is arc-shaped and connected end to end to form a ring-shaped installation floating pad, each of the installation segments is provided with a ballast tank, and each of the installation segments is provided with at least one airbag on the inner side.

[0013] Optionally, each of the installation segments is made of metal, and each of the installation segments is provided with a ballast tank.

[0014] Optionally, the positioning anchor is a suction cylinder anchor.

[0015] The present invention also provides a method for laying and installing an offshore wind turbine, comprising the following steps:

[0016] Step 1: providing a barrel foundation to be installed, wherein the barrel foundation comprises a base and a tower vertically arranged on the base, and a plurality of first lifting ears are arranged at the upper end of the base;

[0017] Step 2: providing an installation vessel, wherein the installation vessel has a placement space, wherein the placement space is used for placing the cylindrical sinking vessel before installation, and the installation vessel has a plurality of cranes evenly arranged around the placement space;

[0018] Step 3: providing an annular installation floating cushion, movably sleeved on the cylindrical foundation, arranging a ballast tank connected to a venting device and an injection device inside the installation floating cushion, arranging an air bag between the installation floating cushion and the tower, connecting the air bag with an air valve, and arranging a plurality of second lifting ears on the outside of the installation floating cushion;

[0019] Step 4: placing the barrel foundation in the placement space, then driving and mooring the installation vessel to the vicinity of the planned installation point, and fixing the fixed ends of the plurality of cranes to the plurality of the first lifting ears accordingly;

[0020] Step 5: Using the mooring system of the installation vessel, a plurality of positioning anchors each equipped with a winch are sunk at the lower end of the placement space, so that the plurality of positioning anchors are arranged in a circular ring, and at the same time, the fixed end of the winch is fixed to the second lifting lug;

[0021] Step 6: Inflate the airbag through the air valve so that the installation floating cushion is relatively fixed to the base, and at the same time fill the ballast tank with air through the ventilation device and the injection device;

[0022] Step 7: gradually lowering the barrel foundation by the crane, and adjusting the air and liquid in the ballast tank by the ventilation device and the injection device as the barrel foundation sinks deeper;

[0023] Step 8: When the cylindrical foundation sinks to the bottom and the installation is completed, the air in the air bag is discharged through the air valve, and the water in the ballast tank is discharged through the ventilation device and the injection device, and air is injected into the ballast tank to make the installed floating pad float to the surface and bring up the positioning anchor.

[0024] Optionally, a movable limiting structure is provided on the mounting floating pad. When the cylindrical foundation is sunk, the limiting structure is abutted against the lower end of the base to prevent the cylindrical foundation from falling off from the lower end of the ring hole of the mounting floating pad. When the cylindrical foundation is about to sink to the bottom, the limiting structure is moved to the side of the mounting floating pad, and the limiting structure is spaced apart from the lower end of the cylindrical foundation in the up and down directions.

[0025] The technical solution of the present invention provides convenient shelving conditions for the barrel foundation before sinking and installation by setting a placement space on the installation ship. Multiple first lifting ears are evenly distributed on the upper end of the base, and multiple cranes are evenly arranged around the placement space. The fixed end of each crane corresponds to a first lifting ear for fixing, so that the stable lowering operation of the barrel foundation can be achieved through the crane. In addition, a ring-shaped installation floating cushion is set on the outer periphery of the base, and the ballast tank inside the installation floating cushion is connected with the ventilation device and the injection device, and the air and liquid in the ballast tank can be controlled by the ventilation device and the injection device. At the same time, an air bag connected to the air valve is set on the inner side of the installation floating cushion. After the air bag is inflated, it is tightly against the base, so that the installation floating cushion and the base are relatively stable, so that during the sinking process of the barrel foundation, the ballast tank can be effectively controlled by the ventilation device and the injection device, and the buoyancy of the installation floating cushion and the barrel foundation can be adjusted at different depths to ensure the smooth progress of the sinking and installation operation.

[0026] In addition, a plurality of second lifting eyes are evenly arranged on the outside of the installation buoy, and an anchoring system is configured on the installation vessel. A plurality of positioning anchors are arranged at the lower end of the placement space through the anchoring system. Each positioning anchor is cooperatively arranged with a winch, and a fixed end of each winch is correspondingly fixed to a second lifting eye. Through the coordinated operation of a plurality of winches, the horizontal displacement of the barrel foundation can be effectively controlled to reduce the interference of the ocean current on the horizontal direction of the barrel foundation, which greatly enhances the stability and reliability of the barrel foundation sinking and installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of an embodiment of an offshore wind turbine sinking and installation device of the present invention;

[0029] Figure 2 for Figure 1 Bottom view of the offshore wind turbine installation device;

[0030] Figure 3 for Figure 1 Structural diagram of the middle tube foundation;

[0031] Figure 4 for Figure 1 Schematic diagram of the structure of the installation of floating pad;

[0032] Figure 5 for Figure 4Exploded view of the installation of floating pads.

[0033] Figure 6 This is a flow chart of an embodiment of a method for laying and installing an offshore wind turbine according to the present invention.

[0034] Explanation of the reference numerals: 10, barrel foundation; 11, base; 111, first lifting eye; 112, partition; 12, tower; 20, installation vessel; 21, placement space; 22, crane; 23, positioning anchor; 24, winch; 30, installation buoy; 31, installation segment; 32, airbag; 33, second lifting eye; 41, first limit plate; 42, second limit plate

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The present invention provides an offshore wind turbine sinking and installation device for sinking and installing a barrel-type foundation. The barrel-type foundation comprises a base and a tower. The tower is vertically arranged at the upper end of the base. A plurality of first lifting ears are distributed at the upper end of the base.

[0040] In the embodiment of the present invention, Figures 1 to 5 As shown, the offshore wind turbine sinking and installation device includes a feature that it includes an installation vessel 20 and an installation buoy 30; the installation vessel 20 is provided with a placement space 21, the placement space 21 is used for placing the barrel foundation 10 before sinking, the installation vessel 20 is provided with a plurality of cranes 22, and the plurality of cranes 22 are evenly arranged around the placement space 21, and the plurality of fixed ends of the plurality of cranes 22 are correspondingly fixed to the plurality of first lifting ears 111, and the installation vessel 20 is provided with an anchoring system, and the anchoring system arranges a plurality of positioning anchors 23 at the lower end of the placement space 21 Each positioning anchor 23 is provided with a winch 24; the mounting floating pad 30 is annular and can be movably mounted on the base 11. A ballast tank is provided inside the mounting floating pad 30, and the ballast tank is connected to a ventilation device and an injection device. There is also an air bag 32 on the inner side of the mounting floating pad 30, and the air bag 32 is connected to an air valve. After the air bag 32 is inflated, it abuts against the base 11 to relatively fix the mounting floating pad 30 and the base 11. A plurality of second lifting ears 33 are distributed on the outer side of the mounting floating pad 30, and the fixed end of the winch 24 is fixed to the second lifting ear 33.

[0041] Specifically, when the cylindrical foundation 10 is sunk and installed, the annular installation floating pad 30 is first mounted on the base 11, and the air bag 32 is inflated through the air valve. The installation floating pad 30 and the cylindrical foundation 10 are relatively fixed by the friction force of the air bag 32, and then the cylindrical foundation 10 is slowly lowered by the crane 22. At the same time, multiple winches 24 control the horizontal movement of the cylindrical foundation 10 to avoid the influence of the ocean current on the horizontal direction of the cylindrical foundation 10, so as to control the stable sinking of the cylindrical foundation 10. At the same time, as the sinking depth of the cylindrical foundation 10 increases, the ballast tank gradually discharges the internal air through the ventilation device and the injection device, and injects liquid, thereby controlling the buoyancy of the installation floating pad 30 and the cylindrical foundation 10 at different depths, so as to better assist the sinking and installation of the cylindrical foundation 10. After the sinking and installation is completed, the air in the air bag 32 can be released through the air valve, so that the installation floating pad 30 is no longer fixed relative to the barrel foundation 10, and the ballast tank discharges the internal liquid through the ventilation device and the injection device, and injects gas, so that the installation floating pad 30 drives the positioning anchor 23 and the winch 24 to float to the surface, thereby recovering the installation floating pad 30, the positioning anchor 23 and the winch 24.

[0042] The technical solution of the present invention provides convenient storage conditions for the barrel foundation 10 before sinking and installation by setting a placement space 21 on the installation ship 20. A plurality of first lifting ears 111 are evenly distributed on the upper end of the base 11, and a plurality of cranes 22 are evenly arranged around the placement space 21. The fixed end of each crane 22 is fixed to a corresponding first lifting ear 111, so that the barrel foundation 10 can be stably lowered by the crane 22. In addition, an annular installation floating pad 30 is provided to be sleeved on the outer periphery of the base 11, and the ballast tank inside the installation floating pad 30 is connected to the ventilation device and the injection device, and the air and liquid in the ballast tank can be controlled by the ventilation device and the injection device. At the same time, an air bag 32 connected to the air valve is arranged on the inner side of the installation floating pad 30. After the air bag 32 is inflated, it is tightly against the base 11, so that the installation floating pad 30 and the base 11 are relatively stable. Therefore, during the sinking process of the barrel foundation 10, the ballast tank can be effectively controlled by the ventilation device and the injection device to achieve the buoyancy of the installation floating pad 30 and the barrel foundation 10 at different depths, thereby ensuring the smooth progress of the sinking and installation operation. In addition, a plurality of second lifting ears 33 are evenly arranged on the outside of the installation buoy 30, and an anchoring system is configured on the installation vessel 20. A plurality of positioning anchors 23 are arranged at the lower end of the placement space 21 through the anchoring system. Each positioning anchor 23 is cooperatively arranged with a winch 24, and a fixed end of each winch 24 is correspondingly fixed to a second lifting ear 33. Through the coordinated operation of a plurality of winches 24, the horizontal displacement of the cylindrical foundation 10 can be effectively controlled to reduce the horizontal interference of the ocean current on the cylindrical foundation 10, which greatly enhances the stability and reliability of the cylindrical foundation 10 sinking and installation process, and provides solid technical support and guarantee for the construction of offshore wind power facilities.

[0043] In some embodiments, the mounting floating pad 30 is provided with a plurality of movable first limiting plates 41, and the first limiting plates 41 have a limiting state and an avoiding state. In the limiting state, the first limiting plates 41 are at least partially located at the lower end of the cavity of the mounting floating pad 30. In the avoiding state, the first limiting plates 41 are located on the peripheral side of the mounting floating pad 30 and are spaced from the lower end of the mounting floating pad 30 in the up and down directions.

[0044] Specifically, when the first limiting plate 41 is in the limiting state, the first limiting plate 41 is partially located at the lower end of the cavity of the installation floating pad 30, closing the lower end of the ring hole of the installation floating pad 30, preventing the barrel foundation 10 from falling off the lower end of the installation floating pad 30 during the installation process, and further strengthening the relative stability of the barrel foundation 10 and the installation floating pad 30. Moreover, when the barrel foundation 10 is about to sink to the bottom, by moving the first limiting plate 41 to the avoidance state, the first limiting plate 41 moves to the peripheral side of the installation floating pad 30 and is spaced from the lower end of the installation floating pad 30 in the vertical direction, thus preventing the first limiting plate 41 from interfering with the sinking process of the barrel foundation 10.

[0045] In some embodiments, a negative pressure cavity is provided at the lower end of the base 11, a central negative pressure chamber is provided at the center of the negative pressure cavity, a plurality of peripheral negative pressure chambers are distributed around the central negative pressure chamber, and each adjacent two peripheral negative pressure chambers are separated by a partition 112, and each first limit plate 41 is correspondingly arranged under a partition 112.

[0046] Specifically, a negative pressure bin structure is provided at the bottom of the barrel foundation 10, and the air in the negative pressure bin can be extracted to enhance the adsorption force between the barrel foundation 10 and the seabed, thereby improving the stability of the barrel foundation 10 after installation. Moreover, compared with providing a negative pressure bin with a larger space, the structure of providing a central negative pressure bin and multiple peripheral negative pressure bins can adjust the negative pressure of the central negative pressure bin and multiple peripheral negative pressure bins respectively, and can more finely adjust the pressure distribution between the base 11 and the seabed, so that the load borne by the base 11 is more uniform. Furthermore, a first limiting plate 41 is provided for the partition 112 between two adjacent peripheral negative pressure bins. The first limiting plate 41 abuts against the bottom of the partition 112 when in the limiting state, and the force is more reasonable.

[0047] In some embodiments, the mounting floating pad 30 is provided with a plurality of movable second limiting plates 42, wherein the length of the second limiting plates 42 is less than the length of the first limiting plates 41, and a second limiting plate 42 is provided between any two adjacent first limiting plates 41. In the limited state, the second limiting plates 42 at least partially abut against the periphery of the peripheral negative pressure chamber. After the first limiting plates 41 are fully moved to the avoidance state, the second limiting plates 42 move to a position located on the peripheral side of the mounting floating pad 30, and are spaced apart from the lower end of the mounting floating pad 30 in the up and down directions.

[0048] Specifically, when the first limiting plate 41 is in a limiting state, the second limiting plate 42 abuts against the peripheral portion of the outer negative pressure chamber, and the second limiting plate 42 cooperates with the first limiting plate 41 to further limit the base 11, so that the fixed structure of the barrel foundation 10 and the mounting floating pad 30 is more stable. When the barrel foundation 10 is about to sink to the bottom and contact the seabed, since the first limit plate 41 is longer than the second limit plate 42, if the first limit plate 41 cannot move to the avoidance state in time, the first limit plate 41 may contact the seabed during the sinking process of the barrel foundation 10, thereby affecting the sinking installation of the barrel foundation 10. Therefore, the first limit plate 41 moves to the avoidance state of the second limit plate 42 in advance to avoid the first limit plate 41 from interfering with the sinking of the barrel foundation 10. The length of the second limit plate 42 is smaller than the first limit plate 41. When the first limit plate 41 moves to the avoidance state, the second limit plate 42 continues to limit the base 11, and the second limit plate 42 still has enough space and time to move to avoid the seabed, making the sinking installation of the barrel foundation 10 more reliable.

[0049] In some embodiments, the mounting floating pad 30 includes at least two mounting segments 31, each mounting segment 31 is arc-shaped and connected end to end to form a ring-shaped mounting floating pad 30, each mounting segment 31 is provided with a ballast tank, and each mounting segment 31 is provided with at least one airbag 32 on the inner side.

[0050] Specifically, if the installation floating pad 30 is an integrated type, the volume and weight are relatively large, and the split and detachable installation segments 31 are more convenient to transport after disassembly, and each installation segment 31 can be transported to the location of the installation ship 20 and then assembled on site, which greatly reduces the difficulty of transportation and installation. Furthermore, a plurality of air bags 32 are arranged on the inner side of each installation segment 31, and the air bags 32 of all installation segments 31 are surrounded in a ring shape, so that the forces at various positions on the inner side of the installation floating pad 30 and the barrel foundation 10 are relatively uniform.

[0051] It is worth noting that the offshore wind turbine sinking and installation device proposed in the present invention is also suitable for the installation of the tower 12 of the offshore wind turbine on the cylindrical foundation 10. After the tower 12 and the cylindrical foundation 10 are sunk and installed, the installation floating pad 30 can be controlled to float to the water surface along the tower 12, and then the multiple installation sections 31 can be disassembled.

[0052] In some embodiments, each installation segment 31 is made of metal, and each installation segment 31 is provided with a ballast tank. Specifically, when the material of the installation segment 31 is metal, the installation floating pad 30 has high strength and corrosion resistance, and can adapt to the harsh conditions of the marine environment. The ballast tank is provided in each installation segment 31 to ensure that the installation floating pad 30 has a good ability to adjust buoyancy. Further, the material of the installation segment 31 can be steel or aluminum alloy. When the material of the installation segment 31 is aluminum alloy, the weight of the installation segment 31 is lighter, which can make the installation floating pad 30 subject to greater buoyancy; when the material of the installation segment 31 is steel, the weight of the installation floating pad 30 is heavier, and the rigidity of the installation segment 31 is better, which can ensure the structural stability of the installation segment 31 when it is subjected to the impact of seawater. In addition, the material of the installation segment 31 and the size of the ballast tank can be set in a targeted manner according to different models of barrel foundations 10 and different marine environments. In addition, in other embodiments, the material of the installation segment 31 may also be a carbon fiber composite material.

[0053] In some embodiments, the positioning anchor 23 is a suction cylinder anchor. Specifically, the suction cylinder anchor can generate good suction force by relying on the pressure difference between the inside and outside of the cylinder wall, and can be better fixed on the seabed, so that the sinking and installation process of the cylinder foundation 10 is more stable.

[0054] The present invention also provides a method for laying and installing an offshore wind turbine, such as Figure 6 As shown, the following steps are included:

[0055] S10: providing a barrel foundation 10 to be installed, the barrel foundation 10 comprising a base 11 and a tower 12 vertically arranged on the base 11, and a plurality of first lifting ears 111 are arranged at the upper end of the base 11;

[0056] S20: providing an installation vessel 20, the installation vessel 20 having a placement space 21, the placement space 21 being used for placement of the cylindrical sinking before installation, the installation vessel 20 having a plurality of cranes 22 evenly arranged around the placement space 21, the fixed ends of the plurality of cranes 22 being correspondingly fixed to the plurality of first lifting ears 111;

[0057] S30: providing an annular installation floating cushion 30, movably sleeved on the barrel foundation 10, and arranging a ballast tank connected to a venting device and an injection device inside the installation floating cushion 30, and arranging an air bag 32 between the installation floating cushion 30 and the tower 12, and connecting the air bag 32 with an air valve, and arranging a plurality of second lifting ears 33 on the outer side of the installation floating cushion 30;

[0058] S40: placing the barrel foundation 10 in the placement space 21, then driving and mooring the installation vessel 20 to the vicinity of the planned installation point, and fixing the fixed ends of the plurality of cranes 22 to the plurality of first lifting ears 111 accordingly;

[0059] S50: multiple positioning anchors 23 each equipped with a winch 24 are sunk at the lower end of the placement space 21 by using the mooring system of the installation vessel 20, so that the multiple positioning anchors 23 are arranged in a circular ring, and at the same time, the fixed end of the winch 24 is fixed to the second lifting lug 33;

[0060] S60: Inflate the airbag 32 through the air valve so that the installation floating cushion 30 is relatively fixed to the base 11, and at the same time fill the ballast tank with air through the ventilation device and the injection device;

[0061] S70: gradually lowering the barrel foundation 10 by means of the crane 22, and adjusting the air and liquid in the ballast tank by means of the venting device and the injection device as the barrel foundation 10 sinks deeper;

[0062] S50: When the barrel foundation 10 sinks to the bottom and the installation is completed, the air in the air bag 32 is discharged through the air valve, and the water in the ballast tank is discharged through the ventilation device and the injection device, and air is injected into the ballast tank, so that the installation floating pad 30 floats to the surface and brings up the positioning anchor 23.

[0063] Specifically, the cylindrical foundation 10 with the first lifting ear 111 is first placed in the placement space 21 of the installation ship 20, the installation ship 20 is driven to the vicinity of the planned point, the cylindrical foundation 10 is fixed by the crane 22, and the positioning anchor 23 with the winch 24 is sunk at the lower end of the placement space 21 through the anchoring system and the fixed end of the winch 24 is fixed to the second lifting ear 33 of the installation floating pad 30, and the air bag 32 between the installation floating pad 30 and the tower 12 is inflated through the air valve to make it relatively fixed with the base 11, and when the crane 22 lowers the cylindrical foundation 10, the air and water in the ballast tank are adjusted through the ventilation device and the injection device. After the cylindrical foundation 10 is sunk to the bottom and installed, the air in the air bag 32 is discharged, and the ballast tank is adjusted so that the installation floating pad 30 brings up the positioning anchor 23. In this way, during the installation process, by installing the floating pad 30 in coordination with the barrel foundation 10 and adjusting the ballast tank, the buoyancy and stability of the barrel foundation 10 at different depths can be effectively controlled to ensure smooth sinking and installation. Through the crane 22 and the anchoring system of the installation ship 20, the lowering and horizontal movement of the barrel foundation 10 can be accurately controlled to reduce the impact of the ocean current on its horizontal direction and enhance the stability and reliability of the installation process. After the installation is completed, the floating pad 30 and the positioning anchor 23 can be easily recovered, which improves the utilization rate of resources, reduces costs, reduces the remains of offshore facilities, and reduces the potential impact on the marine environment, providing an efficient and stable installation for the barrel foundation 10 as a whole.

[0064] In some embodiments, a movable limiting structure is provided on the installation floating pad 30. When the barrel-type foundation 10 is sunk, the limiting structure is abutted against the lower end of the base 11 to prevent the barrel-type foundation 10 from falling off from the lower end of the ring hole of the installation floating pad 30. When the barrel-type foundation 10 is about to sink to the bottom, the limiting structure is moved to the side of the installation floating pad 30, and the limiting structure is spaced from the lower end of the barrel-type foundation 10 in the vertical direction. Specifically, in this way, a limiting structure is further provided on the installation floating pad 30, so that the barrel-type foundation 10 is prevented from falling off from the lower end of the installation floating pad 30, and the relative stability of the installation floating pad 30 and the barrel-type foundation 10 during the sinking and installation process is enhanced. When the barrel-type foundation 10 is about to sink to the bottom, the limiting structure is moved to avoid the sinking of the barrel-type foundation 10, so that the limiting structure is prevented from affecting the installation of the barrel-type foundation 10, and the sinking and installation of the barrel-type foundation 10 can be carried out smoothly.

[0065] It is worth noting that the offshore wind turbine sinking and installation method proposed by the present invention is also applicable to sinking and installing the tower 12 of the offshore wind turbine on the barrel foundation 10 together.

[0066] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An offshore wind turbine sinking and installation device, used for sinking and installing a barrel foundation, the barrel foundation comprises a base and a tower, the tower is vertically arranged at the upper end of the base, and a plurality of first lifting ears are distributed at the upper end of the base, characterized in that: include: The installation vessel is provided with a placement space, the placement space is used for placing the barrel foundation before sinking, the installation vessel is provided with a plurality of cranes, and the plurality of cranes are evenly arranged around the placement space, a plurality of fixed ends of the plurality of cranes are correspondingly fixed to a plurality of the first lifting ears, the installation vessel is provided with an anchoring system, the anchoring system arranges a plurality of positioning anchors at the lower end of the placement space, and each positioning anchor is provided with a winch; and The mounting floating pad is annular in shape and can be movably mounted on the base. A ballast tank is provided inside the mounting floating pad, and the ballast tank is connected to a ventilation device and an injection device. There is also an air bag on the inner side of the mounting floating pad, and the air bag is connected to an air valve. After the air bag is inflated, it abuts against the base to relatively fix the mounting floating pad and the base. A plurality of second lifting ears are distributed on the outer side of the mounting floating pad, and the fixed end of the winch is fixed to the second lifting ear.

2. The offshore wind turbine sinking and installation device according to claim 1, characterized in that: The mounting floating pad is provided with a plurality of movable first limiting plates, and the first limiting plates have a limiting state and an avoiding state. In the limiting state, the first limiting plates are at least partially located at the lower end of the cavity of the mounting floating pad. In the avoiding state, the first limiting plates are located on the peripheral side of the mounting floating pad and are spaced apart from the lower end of the mounting floating pad in the up and down directions.

3. The offshore wind turbine sinking and installation device according to claim 2, characterized in that: A negative pressure cavity is provided at the lower end of the base, a central negative pressure chamber is provided at the center of the negative pressure cavity, a plurality of peripheral negative pressure chambers are distributed around the central negative pressure chamber, each adjacent two peripheral negative pressure chambers are separated by a partition, and each of the first limiting plates is correspondingly arranged under one of the partitions.

4. The offshore wind turbine sinking and installation device according to claim 3, characterized in that: The mounting floating pad is provided with a plurality of movable second limiting plates, the length of the second limiting plates being smaller than the length of the first limiting plates, and a second limiting plate is provided between any two adjacent first limiting plates. In the limiting state, the second limiting plate at least partially abuts against the periphery of the peripheral negative pressure bin, and after the first limiting plate is fully moved to the avoiding state, the second limiting plate moves to a position located on the peripheral side of the mounting floating pad, and is spaced apart from the lower end of the mounting floating pad in the up and down directions.

5. The offshore wind turbine sinking and installation device according to claim 2, characterized in that: The installation floating cushion includes at least two installation segments, each of which is arc-shaped and connected end to end to form a ring-shaped installation floating cushion. Each of the installation segments is provided with a ballast tank, and each of the installation segments is provided with at least one airbag on the inner side.

6. The offshore wind turbine sinking and installation device according to claim 5, characterized in that: Each of the installation sections is made of metal, and each of the installation sections is provided with a ballast tank.

7. The offshore wind turbine sinking and installation device according to claim 1, characterized in that: The positioning anchor is a suction cylinder anchor.

8. A method for laying and installing an offshore wind turbine, characterized in that: The following steps are involved: Providing a barrel-type foundation to be installed, the barrel-type foundation comprising a base and a tower vertically arranged on the base, and a plurality of first lifting ears are arranged at the upper end of the base; Provided is an installation vessel, the installation vessel having a placement space, the placement space being used for placement of the cylindrical sinking vessel before installation, and a plurality of cranes being evenly arranged around the placement space on the installation vessel; Provided is an annular installation floating cushion, the installation floating cushion is movably sleeved on the cylindrical foundation, a ballast tank connected to a venting device and an injection device is arranged inside the installation floating cushion, an air bag is arranged between the installation floating cushion and the tower, the air bag is connected to an air valve, and a plurality of second lifting ears are arranged on the outside of the installation floating cushion; The barrel foundation is placed in the placement space, and then the installation vessel is driven and moored to the vicinity of the planned installation point, and the fixed ends of the plurality of cranes are correspondingly fixed to the plurality of the first lifting ears; Using the mooring system of the installation vessel, a plurality of positioning anchors each equipped with a winch are sunk at the lower end of the placement space, so that the plurality of positioning anchors are arranged in a circular ring shape, and at the same time, the fixed end of the winch is fixed to the second lifting lug; Inflate the airbag through the air valve so that the installation floating cushion is relatively fixed to the base, and at the same time fill the ballast tank with air through the ventilation device and the injection device; The barrel foundation is gradually lowered by the crane, and the air and liquid in the ballast tank are adjusted by the ventilation device and the injection device as the barrel foundation sinks deeper; When the cylindrical foundation sinks to the bottom and is installed, the air in the air bag is discharged through the air valve, and at the same time, the water in the ballast tank is discharged through the ventilation device and the injection device, and air is injected into the ballast tank, so that the installation floating pad floats to the surface and brings up the positioning anchor.

9. The offshore wind turbine sinking and installation method according to claim 8, characterized in that: A movable limiting structure is arranged on the mounting floating pad. When the cylindrical foundation is sunk, the limiting structure is abutted against the lower end of the base to prevent the cylindrical foundation from falling off from the lower end of the ring hole of the mounting floating pad. When the cylindrical foundation is about to sink to the bottom, the limiting structure is moved to the side of the mounting floating pad, and the limiting structure is spaced apart from the lower end of the cylindrical foundation in the up and down directions.

Images