Overall floating transportation and installation system and method for multiple foundations, tower drums and fans of offshore wind power

Abstract

The invention discloses an offshore wind power multi-foundation, tower drum and fan integral floating transportation and installation system which comprises a plurality of cylindrical foundations, and a set of wind power equipment is installed on each cylindrical foundation; the tower tube structure is a telescopic tower tube structure, the main floating transport ship is formed by combining S pairs of U-shaped ship bodies, the auxiliary floating transport ship is detachably connected with the opening ends of the U-shaped ship bodies, and 2S quadrilateral frame ship units are formed after the main floating transport ship and the auxiliary floating transport ship are connected; the circumferential surface of the cylindrical foundation is matched with the side faces of the four corners of the inner frame of the quadrilateral frame ship unit. A main truss structure is built on the main floating ship, and a hoop device, a tower tube jacking device and a tower tube sinking device with a plurality of descending hydraulic cylinders are arranged on the main truss structure corresponding to each set of wind power equipment; piston rods extending downwards from the descending hydraulic cylinders are detachably connected with descending platforms from the first layer to the Tth layer arranged on the fan supporting frame in sequence. The stability, safety and efficiency of floating transportation and installation of the fan equipment in deep water are improved.

Description

Technical Field

[0001] This invention relates to the field of offshore wind power, and in particular to an integrated floating installation system and method for multiple foundations, towers and turbines of an offshore wind turbine. Background Technology

[0002] Currently, offshore wind power, as an important form of renewable energy, is gradually becoming a key component of global energy structure transformation with continuous technological advancements and the ongoing development of offshore wind energy resources. During the construction of offshore wind power projects, the installation of wind turbine foundations has always been a challenging technical problem. Traditional offshore wind power foundation installation and transportation typically require specialized installation platforms or transport vessels, resulting in high costs, long lead times, and dependence on sea conditions.

[0003] Currently, some research has yielded certain results in this field. For example, patent application number 202210380274.2 discloses an integrated vessel for transporting and installing offshore wind turbine cylindrical foundations in deep water areas, as well as its installation method. This technology effectively solves the problem of transporting and installing deep-water cylindrical foundations, improves the economy and efficiency of construction, and ensures the safety and stability of the construction process. However, this solution is only suitable for the installation of a single cylindrical foundation, usually requiring multiple round trips for installation, which cannot meet the needs of large-scale offshore wind power development. Patent application number 202211232837.X discloses a floating platform for multiple offshore wind turbines and its installation method, which can simultaneously transport multiple offshore wind turbine cylindrical foundation structures, effectively reducing the installation cost during large-scale offshore wind power construction and meeting the needs of large-scale offshore wind power development. However, the above-mentioned simultaneous transport of multiple offshore wind turbine cylindrical foundation structures is not suitable for deep water areas or situations where the tower is relatively high. Because the tower height is large and the center of gravity is high in these two situations, the tower is prone to tilting and capsizing during floating due to wave fluctuations. Summary of the Invention

[0004] This invention provides a system and method for the integrated floating and installation of multiple foundations, towers, and wind turbines for offshore wind power, in order to solve the technical problems existing in the prior art.

[0005] The technical solution adopted by this invention to solve the technical problems existing in the prior art is as follows:

[0006] An integrated floating installation system for multiple offshore wind turbine foundations, towers, and turbines includes multiple cylindrical foundations, with one set of wind power equipment installed on each cylindrical foundation. Each cylindrical foundation is equipped with a negative pressure load adjustment system for controlling buoyancy. Each set of wind power equipment includes a tower structure, a turbine, and blades connected in sequence. The tower structure is a telescopic tower structure, comprising N layers of towers connected in sequence. In a retracted state, the N layers of towers are nested together, with the innermost tower connected to the turbine base. The base of the outermost tower is fixedly connected to the cylindrical foundation via a turbine support frame.

[0007] It also includes a main floating transport vessel composed of S pairs of U-shaped hulls, and 2S auxiliary floating transport vessels that can be detachably connected to the open ends of the U-shaped hulls. Each pair of U-shaped hulls is centrally symmetrically distributed. After the main floating transport vessel and the auxiliary floating transport vessels are connected, they form 2S quadrilateral frame ship units. The cross-section of the inner frame of each quadrilateral frame ship unit is a square with arc corners. During floating, each quadrilateral frame ship unit accommodates a cylindrical foundation in its inner frame, and the circumferential surface of the cylindrical foundation matches the four corner sides of the inner frame of the quadrilateral frame ship unit.

[0008] The main floating transport vessel is equipped with a main truss structure. On the main truss structure, corresponding to each wind turbine, there are: a clamping device to provide vertical clamping force for the wind turbine, a tower lifting device to unfold the telescopic tower structure from the retracted state, and a tower sinking device to maintain uniform speed and verticality when the cylindrical foundation sinks. The auxiliary floating transport vessel is equipped with an auxiliary truss structure, which can be detachably connected to the main truss structure and is used to provide auxiliary support to the main truss structure.

[0009] The tower sinking device includes multiple hydraulic cylinders with piston rods extending downwards. The wind turbine support frame is equipped with first to T-level sinking platforms connected sequentially from bottom to top, where T≥2. During the sinking of the cylindrical foundation, the top of the piston rod of the sinking hydraulic cylinder is detachably connected to the first to T-level sinking platforms sequentially.

[0010] Furthermore, the tower lifting device includes first to Mth lifting platforms connected sequentially from bottom to top, where M≥2; each lifting platform includes multiple lifting hydraulic cylinders with piston rods extending upwards; the bottom of the upper lifting platform is fixedly connected to the top of the piston rod of the lifting hydraulic cylinder of the adjacent lower lifting platform; during the unfolding process of the telescopic tower structure from the retracted state, the Mth lifting platform is detachably connected from top to bottom to the top of each tower layer whose top height is greater than or equal to the height of the Mth lifting platform.

[0011] Furthermore, the tower jacking device also includes guide columns, and each jacking platform is equipped with guide sleeves that slide in conjunction with the guide columns.

[0012] Furthermore, the clamping device includes a pair of clamping beams for clamping the connection between the innermost tower and the wind turbine base; corresponding to the connection between the innermost tower and the wind turbine base, each of the two opposite sides of the main frame structure is provided with a slide rail extending along the side rail direction, and the pair of clamping beams are all spanned across the slide rails on the two opposite sides and slide in cooperation with the slide rails; the opposing sides of the pair of clamping beams are provided with grooves; at each end of the slide rail is a driving device that causes the pair of clamping beams to move in opposite directions; the opposing sides of the pair of clamping beams are provided with grooves; during floating, the connection between the innermost tower and the wind turbine base is located in the groove of the pair of clamping beams and is clamped by the pair of clamping beams.

[0013] Furthermore, the groove is shaped like the number eight or an arc; the surface of the groove is provided with an annular protrusion corresponding to the connection between the innermost tower and the wind turbine base, and an annular groove is provided to accommodate the annular protrusion.

[0014] Furthermore, the cylindrical foundation is a five-tube cylindrical foundation, which includes a central tube and four planetary tubes evenly distributed around the central tube. The four planetary tubes are partially embedded in the central tube.

[0015] Furthermore, the four corner arc surfaces of the inner frame of the quadrilateral frame hull are connected to the outer perimeter of the planetary cylinders; the radius of the four corner arc surfaces of the inner frame of the quadrilateral frame hull is greater than the radius of the four planetary cylinders.

[0016] Furthermore, the auxiliary floating vessel is a K-shaped vessel. The top view of the K-shaped vessel is rectangular, and both ends of one of its long sides are provided with protrusions. The sides opposite the two protrusions are concave arcs.

[0017] Furthermore, the 2S quadrilateral frame ship units are combined to form cross, square, and rectangle shapes.

[0018] The present invention also provides a method for the overall floating installation of multiple foundations, towers, and turbines of an offshore wind turbine using the above-mentioned offshore wind turbine multiple foundation, tower, and turbine floating installation system, the method comprising the following steps:

[0019] Step 1: The cylindrical foundation is prefabricated in the dock, and the wind turbine support frame is installed on the cylindrical foundation; the cylindrical foundation is put into a self-floating state and is pulled out of the dock by a winch; the main floating transport vessel is anchored and positioned at the dock exit;

[0020] Step 2: Using a traction device, the cylindrical foundation is sequentially introduced into the U-shaped hull opening of the main floating transport vessel; the cylindrical foundation is then connected to the main floating transport vessel; the main truss structure is then erected on the main floating transport vessel.

[0021] Step 3: Depending on the dock conditions, select either the single-unit wind turbine installation mode or the dual-unit wind turbine installation mode.

[0022] Single wind turbine installation mode: A retractable tower structure is hoisted onto a cylindrical foundation within a U-shaped hull. The base of the outermost tower is fixed to the wind turbine support frame. A clamping device is installed on the main truss structure. The wind turbine is then hoisted, connecting the innermost tower to the wind turbine base, with the clamping device holding the wind turbine. During the installation of the wind power equipment, the buoyancy of the cylindrical foundation is adjusted by a negative pressure load adjustment system, balancing the upward buoyancy and downward gravity on the cylindrical foundation, thus maintaining its self-floating state.

[0023] Dual-unit wind turbine installation mode: Simultaneously hoist two retractable tower structures to the cylindrical foundation within a pair of U-shaped hulls. Simultaneously, the base of the outermost tower of each retractable tower structure is fixed to the wind turbine support frame. Clamping devices are installed on the main truss structure. Two wind turbines are hoisted simultaneously, with the innermost tower connected to the turbine base, and the clamping devices holding the wind turbine equipment. During the installation of the wind power equipment, the buoyancy of the cylindrical foundation is adjusted by the negative pressure load adjustment system, balancing the upward buoyancy and downward gravity on the cylindrical foundation, thus maintaining its self-floating state.

[0024] Step 4: Repeat step 3 until a wind turbine is installed on all cylindrical foundations;

[0025] Step 5: Install the tower lifting device and tower lowering device on the main truss structure;

[0026] Step 6: Connect the 2S auxiliary floating vessels to the open end of the U-shaped hull in sequence, build the auxiliary truss structure on the auxiliary floating vessels, and connect the auxiliary truss structure to the main truss structure.

[0027] Step 7: The main floating transport vessel is towed by a tugboat to the target sea area;

[0028] Step 8: Float the main floating transport vessel to the wind turbine installation site, anchor and position the main floating transport vessel, select a cylindrical foundation located on the relatively outer perimeter for sinking, and use the lowering hydraulic cylinder of the tower sinking device to push the cylindrical foundation downwards. During the sinking process of the cylindrical foundation, the negative pressure load adjustment system of the cylindrical foundation and the lowering hydraulic cylinder are coordinated and controlled to control the extension length and extension speed of the piston rod of the lowering hydraulic cylinder; at the same time, ensure that the difference between the upward buoyancy force and the downward gravity force on the cylindrical foundation is ≤ (weight of the wind turbine + weight of the wind turbine support frame) × 1%; the top of the piston rod of the lowering hydraulic cylinder is detachably connected to the corresponding first to Tth layer lowering platforms in sequence until the cylindrical body of the cylindrical foundation contacts the seabed surface; the retractable tower on it gradually extends and unfolds as the cylindrical foundation sinks in the water;

[0029] Step 9: Using the negative pressure load adjustment system, a negative pressure environment is created for the cylindrical foundation, allowing it to penetrate into the seabed until it is fully settled into place. Then, the piston rod of the lowering hydraulic cylinder is separated from the lowering platform of layer T; the piston rod of the lowering hydraulic cylinder is then raised and reset.

[0030] Step 10: Separate the innermost tower cylinder from the clamping device on the cylindrical foundation, and detachably connect the M-level lifting platform to the top of each tower cylinder from top to bottom. Extend the piston rods of the lifting hydraulic cylinders of each lifting platform upwards sequentially from bottom to top, so that each tower cylinder is fully extended. After each tower cylinder is fully extended, first fix the bottom of the tower cylinder to the top of the tower cylinder below it, then connect the M-level lifting platform to the top of the tower cylinder below it, and then extend the piston rods of the lifting hydraulic cylinders of each lifting platform upwards sequentially. Continue until all tower cylinders are fully extended and adjacent tower cylinders are fixed to each other.

[0031] Step 11: Separate the auxiliary floating transport vessel and its auxiliary truss structure surrounding the cylindrical foundation from the main floating transport vessel and its main truss structure; allow the main floating transport vessel to leave the cylindrical foundation, and then reconnect the auxiliary floating transport vessel and its auxiliary truss structure to the main floating transport vessel and its main truss structure.

[0032] Step 12: Repeat steps 8 to 11 to successively sink and fix all wind power equipment on the seabed and ensure that the wind turbine positions reach the design elevation.

[0033] Step 13: Tow the main floating transport vessel back to the dock.

[0034] The advantages and positive effects of this invention are as follows: This invention proposes an integrated floating installation system and method for multiple offshore wind turbine foundations, towers, and turbines (14 units), suitable for installing wind power equipment in deep, open sea areas far from ports and land. This invention solves the problems of long distances, long construction periods, and high costs associated with floating only one turbine unit at a time. Multiple wind power units can be floated to deeper, open sea areas at a time. Furthermore, by setting up multiple hydraulic cylinders with downward-extending piston rods and sequentially connecting first to T-layer lowering platforms on the turbine support frame from bottom to top, the system facilitates the sinking of the cylindrical foundation. The piston rod of the lowering hydraulic cylinder is detachably connected to the first to the Tth lowering platform in sequence. Working in conjunction with the negative pressure load adjustment system of the cylindrical foundation, it can achieve stable sinking of the cylindrical foundation in deep-sea areas. With the use of clamping devices to provide vertical clamping force for wind turbine equipment and tower lifting devices to unfold the retractable tower structure from the retracted state, the use of large lifting equipment can be avoided. While meeting the requirements of large-scale floating installation, it shortens the construction period of the cylindrical foundation and its entire structure at sea, improves the stability and safety of the cylindrical foundation and its entire structure in deep-water floating installation, and improves project efficiency. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall floating and installation system for multiple foundations, towers and wind turbines in offshore wind power according to the present invention.

[0036] Figure 2 This is a right-side view of a floating installation system for multiple foundations, towers, and wind turbines for offshore wind power, according to the present invention.

[0037] Figure 3 This is a schematic diagram of the U-shaped hull opening through which the cylindrical foundation enters the main floating transport vessel.

[0038] Figure 4 This is a schematic diagram of the wind turbine equipment mounted on a cylindrical foundation within a pair of U-shaped hulls.

[0039] Figure 5 This is a schematic diagram of the wind turbine equipment being installed on the cylindrical foundation above the other pair of U-shaped hulls of the main floating transport vessel after rotating 180°.

[0040] Figure 6 This is a schematic diagram showing the completion of the loading of the first cylindrical foundation and wind turbine equipment onto the ship in the method of the present invention, which is a method for the overall floating and installation of multiple foundations, towers and wind turbines for offshore wind power.

[0041] Figure 7 This is a schematic diagram showing the completion of loading all cylindrical foundations and wind turbine equipment onto a ship in the overall floating and installation method of multiple foundations, towers and wind turbines for offshore wind power according to the present invention.

[0042] Figure 8 This is a schematic diagram of the combination of U-shaped vessel and K-shaped vessel in the floating method provided by the present invention.

[0043] Figure 9 This is a schematic diagram of the process of submerging the first cylindrical foundation and the wind turbine equipment in water during the overall floating and installation of multiple foundations, towers and wind turbines in an offshore wind power system according to the present invention.

[0044] Figure 10 This is a schematic diagram of the underwater completion of the first cylindrical foundation and the wind turbine equipment as an integral structure in a floating installation method for multiple foundations, towers and wind turbines of an offshore wind power plant according to the present invention.

[0045] Figure 11 This is a schematic diagram showing the completion of the lifting of the first tower in a method for the overall floating and installation of multiple foundations, towers and wind turbines for offshore wind power according to the present invention.

[0046] Figure 12 This is a schematic diagram showing the departure of the main floating vessel and the auxiliary floating vessel after all wind power equipment has been installed in the overall floating and installation method of multiple foundations, towers and wind turbines for offshore wind power according to the present invention.

[0047] In the diagram: 1. Sub-scaffolding structure; 2. Main floating transport vessel; 3. Main scaffolding structure; 4. Lifting hydraulic cylinder; 5. Lowering hydraulic cylinder; 6. Cylindrical foundation limiting device; 7. Sub-floating transport vessel; 8. Dock; 9. Lower clamping unit; 10. Upper clamping unit; 11. Cylindrical foundation; 12. Wind turbine support frame; 13. Telescopic tower structure; 14. Wind turbine; 15. Blades; 16. Lifting equipment. Detailed Implementation

[0048] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0049] In the description of this invention, the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; or an electrical connection or signal transmission. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0050] Please see Figures 1 to 12 A floating installation system for multiple offshore wind turbine foundations, towers, and turbines 14 includes multiple cylindrical foundations, with one set of wind power equipment installed on each cylindrical foundation. Each cylindrical foundation is equipped with a negative pressure load adjustment system for controlling buoyancy. Each set of wind power equipment includes a tower structure, a turbine 14, and blades 15 connected in sequence. The tower structure is a telescopic tower structure 13, which includes N layers of towers connected in sequence. The N layers of towers are nested together in the retracted state. The innermost tower is connected to the base of the turbine 14. The base of the outermost tower is fixed to the cylindrical foundation through a turbine support frame 12.

[0051] It also includes a main floating vessel 2 composed of S pairs of U-shaped hulls, and 2S auxiliary floating vessels 7 that are detachably connected to the open ends of the U-shaped hulls, with each pair of U-shaped hulls being centrally symmetrically distributed; after the main floating vessel 2 and the auxiliary floating vessels 7 are connected, they form 2S quadrilateral frame ship units; the cross-section of the inner frame of each quadrilateral frame ship unit is a square with arc corners; during floating, each quadrilateral frame ship unit accommodates a cylindrical foundation in its inner frame, and the circumferential surface of the cylindrical foundation matches the four corner sides of the inner frame of the quadrilateral frame ship unit.

[0052] The main floating transport vessel 2 is equipped with a main truss structure 3. On the main truss structure 3, for each set of wind power equipment, there are: a clamping device for providing vertical clamping force for the wind power equipment; a tower lifting device for unfolding the telescopic tower structure 13 from the retracted state; and a tower sinking device for maintaining uniform speed and verticality when the cylindrical foundation sinks. The auxiliary floating transport vessel 7 is equipped with an auxiliary truss structure 1, which is detachably connected to the main truss structure 3 and is used to provide auxiliary support to the main truss structure 3.

[0053] The tower sinking device includes multiple hydraulic cylinders 5 with piston rods extending downwards. The wind turbine support frame 12 is provided with first to T-level sinking platforms connected sequentially from bottom to top, where T≥2. During the sinking of the cylindrical foundation, the top of the piston rod of the hydraulic cylinder 5 is detachably connected to the first to T-level sinking platforms sequentially.

[0054] The retractable tower structure 13 includes N tower layers connected in sequence, which can be referred to as the first to the Nth tower layers, where N≥2. The first tower layer is the base tower layer. The upper ends of the first to N-1th tower layers are provided with inwardly radially extending top flanges, and the lower ends of the second to Nth tower layers are provided with outwardly radially extending bottom flanges. The upper top flange of the R-1th tower layer and the lower bottom flange of the Rth tower layer are mutually fitted, and both have multiple bolt holes evenly distributed along the circumference. Before the Rth tower layer is lifted, it is nested inside the R-1th tower layer. After the Rth tower layer is lifted, the lower bottom flange of the Rth tower layer and the upper top flange of the R-1th tower layer are fixedly connected by bolts, where 2≤R≤N. The innermost tower layer is the Nth tower layer, which is connected to the base of the wind turbine 14. The outermost tower layer is the first tower layer, and its base is fixedly connected to the cylindrical foundation 11 through the wind turbine support frame 12.

[0055] The U-shaped hulls are arranged in pairs to balance the heave effect of the wind power equipment on both sides in the wind and waves, and to avoid the main floating transport vessel 2 tilting at too large an angle.

[0056] A pair of U-shaped hulls, with their openings facing outwards and connected back-to-back, can be assembled into an H-shaped hull. The H-shaped hull has openings at both ends, and each opening end connects to the two ends of an auxiliary floating vessel 7. The H-shaped hull, together with the two auxiliary floating vessels 7, forms two quadrilateral frame hull units. During floating, two cylindrical foundations are located in the quadrilateral frame hull units on both sides.

[0057] The retractable tower structure 13 is adopted to lower the center of gravity of the wind power equipment and prevent the wind turbine 14 and the wind blades from overturning due to the large tilting force generated by wind and waves during floating due to the excessive center of gravity.

[0058] A clamping device is installed on the main truss structure 3 to provide vertical clamping force for the wind turbine equipment, so that the wind turbine 14 equipment is reliably connected to the main truss structure 3 and receives lateral support from the main truss structure 3. This effectively restricts the horizontal degree of freedom of the wind turbine 14 equipment relative to the main truss structure 3, and also prevents the wind turbine equipment from tilting due to excessive wind and waves during floating.

[0059] A tower sinking device is installed on the main truss structure 3 to maintain uniform speed and verticality when the cylindrical foundation sinks, so that the cylindrical foundation is stable when it is sinking to the seabed and the overall wind power equipment is not tilted and damaged due to excessive tilting angle caused by waves or other reasons.

[0060] A tower lifting device is installed on the main truss structure 3 to unfold the retractable tower structure 13 from the retracted state. The tower lifting device works in conjunction with the tower lowering device to make the retractable tower structure 13 extend downward and upward respectively. After each layer of tower extends to the position relative to the adjacent layer of tower, the two adjacent layers of tower are fixed together. In this way, the N layers of tower are fixed together in sequence to reach the normal operating height of the wind turbine 14. This allows the wind turbine 14 to enter areas far from the shore and in deep waters, making greater use of offshore wind energy.

[0061] Preferably, the tower lifting device may include first to Mth lifting platforms connected sequentially from bottom to top, where M≥2; each lifting platform includes multiple lifting hydraulic cylinders 4 with piston rods extending upwards; the bottom of the upper lifting platform is fixedly connected to the top of the piston rod of the lifting hydraulic cylinder 4 of the adjacent lower lifting platform; during the unfolding process of the telescopic tower structure 13 from the retracted state, the Mth lifting platform is detachably connected from top to bottom to the top of each tower layer whose top height is greater than or equal to the height of the Mth lifting platform.

[0062] The multi-layer lifting platform can increase the extension length of the telescopic tower structure 13, making it easier to install wind turbine 14 equipment with large power generation capacity and large blade diameter.

[0063] Preferably, the tower jacking device may further include guide columns, and each jacking platform is equipped with guide sleeves that slide in conjunction with the guide columns. Using guide columns reduces the radial force on the piston rod when the jacking hydraulic cylinder 4 is working, and also facilitates the smooth rise of the tower.

[0064] The clamping device can adopt various structures, such as setting multiple U-shaped frames along the base of the wind turbine 14 to the lower tower, with rubber pads attached to the inner side of the U-shaped frames, which fits against the outer periphery of the wind turbine equipment to limit the tilting and swaying of the wind turbine equipment relative to the main frame structure 3.

[0065] The clamping device can also use multiple pairs of semi-circular clamps and clamping locking components; the base of the wind turbine 14 to the lower tower is located in the semi-circular clamp, and the clamp is clamped to the base of the wind turbine 14 to the lower tower by the clamping locking components.

[0066] Preferably, the clamping device may include a pair of clamping beams for clamping the connection between the innermost tower and the base of the wind turbine 14; corresponding to the connection between the innermost tower and the base of the wind turbine 14, each of the two opposite sides of the main frame structure 3 is provided with a slide rail extending along the side rail direction, and the pair of clamping beams are all spanned across the slide rails of the two opposite sides and slide in cooperation with the slide rails; the opposing sides of the pair of clamping beams are provided with grooves; each end of the slide rail is provided with a driving device that causes the pair of clamping beams to move in opposite directions; the opposing sides of the pair of clamping beams are provided with grooves; during floating, the connection between the innermost tower and the base of the wind turbine 14 is located in the groove of the pair of clamping beams and is clamped by the pair of clamping beams.

[0067] Preferably, the groove can be V-shaped or arc-shaped; the surface of the groove can correspond to the annular protrusion at the connection between the innermost tower and the base of the fan 14, and an annular groove is provided to accommodate the annular protrusion.

[0068] Preferably, the cylindrical foundation can be a five-tube cylindrical foundation 11, which includes a central tube and four planetary tubes evenly distributed along the circumference of the central tube, with the four planetary tubes partially embedded in the central tube.

[0069] Preferably, the four corner arc surfaces of the inner frame of the quadrilateral frame hull are connected to the outer perimeter of the planetary cylinders; the radius of the four corner arc surfaces of the inner frame of the quadrilateral frame hull is greater than the radius of the four planetary cylinders.

[0070] Preferably, the auxiliary floating vessel 7 can be a K-shaped vessel. The top view of the K-shaped vessel can be rectangular, with protrusions at both ends of one long side, and the opposite sides of the two protrusions are concave arc-shaped.

[0071] Preferably, the 2S quadrilateral frame ship units can be combined into a cross shape, a square shape, and a rectangle shape.

[0072] The cross-shaped, or U-shaped, hull openings are 0°, 90°, 180°, and 270° respectively; a pair of U-shaped hulls are centrally symmetrically distributed, meaning the openings of the two U-shaped hulls are opposite; 2S quadrilateral frame hull units are combined to form a cross shape, meaning that many pairs of U-shaped hulls are perpendicular to other pairs of U-shaped hulls, with a hollow center.

[0073] Multiple pairs of U-shaped hulls arranged side by side can form squares and rectangles; for example, two pairs are squares and three pairs are rectangles.

[0074] The present invention also provides a method for the overall floating installation of multiple offshore wind turbine foundations, towers, and turbines 14 using the above-mentioned offshore wind turbine multiple foundations, towers, and turbines 14 as a whole, the method comprising the following steps:

[0075] Step 1: The cylindrical foundation 11 is prefabricated in the dock 8, and the wind turbine support frame 12 is installed on the cylindrical foundation 11; the cylindrical foundation 11 is put into a self-floating state, and the cylindrical foundation 11 is pulled out of the dock by a winch; the main floating transport vessel 2 is anchored and positioned at the exit of the dock 8.

[0076] Step 2: The cylindrical foundation 11 is sequentially introduced into the U-shaped hull opening of the main floating transport vessel 2 through the traction device; the cylindrical foundation 11 is connected to the main floating transport vessel 2; and the main truss structure 3 is built on the main floating transport vessel 2.

[0077] Step 3: Based on the configuration of the lifting equipment 16 in the dock 8, select either the single-fan equipment hoisting and installation mode or the dual-fan equipment hoisting and installation mode.

[0078] Single wind turbine installation mode: A retractable tower structure 13 is hoisted onto a cylindrical foundation 11 in a U-shaped hull, and the base of the outermost tower of the retractable tower structure 13 is fixed to the wind turbine support frame 12. A clamping device is installed on the main truss structure 3. The wind turbine 14 is hoisted, and the innermost tower is connected to the base of the wind turbine 14. The clamping device holds the wind turbine 14. During the installation of the wind power equipment, the buoyancy of the cylindrical foundation 11 is adjusted by the negative pressure load adjustment system, so that the upward buoyancy of the cylindrical foundation 11 is balanced with the downward gravity, and the cylindrical foundation 11 remains in a self-floating state.

[0079] Dual-fan installation mode: Simultaneously hoist two retractable tower structures 13 to the cylindrical foundation 11 in a pair of U-shaped hulls, and fix the base of the outermost tower of the two retractable tower structures 13 to the wind turbine support frame 12. Install clamping devices on the main frame structure 3, and hoist two wind turbines 14 at the same time, connecting the innermost tower to the base of the wind turbine 14, so that the clamping devices hold the wind turbine 14 equipment; during the installation of wind power equipment, the buoyancy of the cylindrical foundation 11 is adjusted by the negative pressure load adjustment system, so that the upward buoyancy of the cylindrical foundation 11 is balanced with the downward gravity, so that the cylindrical foundation 11 remains in a self-floating state.

[0080] Step 4: Repeat step 3 until a set of wind power equipment is installed on all cylindrical foundations 11.

[0081] Step 5: Install the tower lifting device and the tower lowering device on the main truss structure 3.

[0082] Step 6: Connect the 2S auxiliary floating vessels 7 to the open end of the U-shaped hull in sequence, build the auxiliary truss structure 1 on the auxiliary floating vessels 7, and connect the auxiliary truss structure 1 to the main truss structure 3.

[0083] Step 7: The main floating transport vessel 2 is towed by a tugboat to the target sea area.

[0084] Step 8: The main floating transport vessel 2 is floated to the installation site of a wind power equipment. The main floating transport vessel 2 is anchored and positioned. A cylindrical foundation located on the outer periphery is selected for sinking. The lowering hydraulic cylinder 5 of the tower sinking device is used to push the cylindrical foundation 11 downward. During the sinking process of the cylindrical foundation, the negative pressure load adjustment system of the cylindrical foundation 11 and the lowering hydraulic cylinder 5 are coordinated and controlled to control the extension length and extension speed of the piston rod of the lowering hydraulic cylinder 5. At the same time, the difference between the upward buoyancy force and the downward gravity force on the cylindrical foundation 11 is ≤ (weight of the wind power equipment + weight of the wind turbine support frame 12) × 1%. The top of the piston rod of the lowering hydraulic cylinder 5 is detachably connected to the corresponding first to Tth layer lowering platforms in sequence until the cylindrical body of the cylindrical foundation 11 contacts the seabed surface. The telescopic tower on it gradually extends and unfolds as the cylindrical foundation 11 sinks in the water.

[0085] Step 9: Using the negative pressure load adjustment system, a negative pressure environment is created for the cylindrical foundation 11, allowing it to penetrate into the seabed. Once the cylindrical foundation 11 has completely settled into place, the piston rod of the lowering hydraulic cylinder 5 is separated from the lowering platform of the T-level; the piston rod of the lowering hydraulic cylinder 5 then rises and resets.

[0086] Step 10: Separate the innermost tower cylinder on the cylindrical foundation 11 from the clamping device, and detachably connect the Mth layer lifting platform to the top of each tower cylinder from top to bottom. Extend the piston rods of the lifting hydraulic cylinders 4 of each lifting platform from bottom to top, so that each tower cylinder is extended into position. After each tower cylinder is extended into position, first fix the bottom of the tower cylinder to the top of the next tower cylinder, then connect the Mth layer lifting platform to the top of the next tower cylinder, and then extend the piston rods of the lifting hydraulic cylinders 4 of each lifting platform into position until all tower cylinders are extended into position and adjacent tower cylinders are fixed to each other.

[0087] Step 11: Separate the auxiliary floating vessel 7 and its auxiliary truss structure 1 surrounding the cylindrical foundation 11 from the main floating vessel 2 and the main truss structure 3; allow the main floating vessel 2 to leave the cylindrical foundation 11, and then reconnect the auxiliary floating vessel 7 and its auxiliary truss structure 1 to the main floating vessel 2 and the main truss structure 3.

[0088] Step 12: Repeat steps 8 to 11 to successively sink and fix all wind power equipment on the seabed until the position of wind turbine 14 reaches the design elevation.

[0089] Step 13: Tow the main floating transport vessel 2 back to the dock 8.

[0090] The structure, workflow, and working principle of the present invention are further illustrated below with reference to a preferred embodiment:

[0091] An integrated floating installation system for multiple offshore wind turbine foundations, towers, and turbines 14 includes four cylindrical foundations, with one set of wind power equipment installed on each cylindrical foundation. Each cylindrical foundation is equipped with a negative pressure load adjustment system for controlling buoyancy. Each set of wind power equipment includes a tower structure, a turbine 14, and blades 15 connected in sequence. The tower structure is a telescopic tower structure 13, which includes three layers of towers connected in sequence. The three layers of towers are nested together in the retracted state. The innermost tower is connected to the base of the turbine 14. The base of the outermost tower is fixed to the cylindrical foundation through a turbine support frame 12.

[0092] It also includes a main floating vessel 2 composed of two pairs of U-shaped hulls, and four auxiliary floating vessels 7 that are detachably connected to the open ends of the U-shaped hulls. Each pair of U-shaped hulls is centrally symmetrically distributed. After the main floating vessel 2 and the auxiliary floating vessels 7 are connected, they form four quadrilateral frame ship units. The cross-section of the inner frame of each quadrilateral frame ship unit is a square with arc corners. During floating, each quadrilateral frame ship unit accommodates a cylindrical foundation in its inner frame, and the circumferential surface of the cylindrical foundation matches the four corner sides of the inner frame of the quadrilateral frame ship unit.

[0093] The main floating transport vessel 2 is equipped with a main truss structure 3. On the main truss structure 3, for each set of wind power equipment, there are: a clamping device for providing vertical clamping force for the wind power equipment; a tower lifting device for unfolding the telescopic tower structure 13 from the retracted state; and a tower sinking device for maintaining uniform speed and verticality when the cylindrical foundation sinks. The auxiliary floating transport vessel 7 is equipped with an auxiliary truss structure 1, which is detachably connected to the main truss structure 3 and is used to provide auxiliary support to the main truss structure 3.

[0094] The tower sinking device includes multiple hydraulic cylinders 5 with piston rods extending downwards, and the wind turbine support frame 12 is provided with first to third sinking platforms connected sequentially from bottom to top; during the sinking of the cylindrical foundation, the top of the piston rod of the hydraulic cylinder 5 is detachably connected to the first to third sinking platforms in sequence.

[0095] The piston rod of the lowering hydraulic cylinder 5 extends downward, controlling the extension length and speed of the piston rod to control the sinking speed of the cylindrical foundation, keeping the top height of the cylindrical foundation horizontal, thereby maintaining uniform speed and verticality during the sinking of the cylindrical foundation.

[0096] The tower lifting device includes first to Mth lifting platforms connected sequentially from bottom to top, where M≥2; each lifting platform includes multiple lifting hydraulic cylinders 4 with piston rods extending upwards; the bottom of the upper lifting platform is fixedly connected to the top of the piston rod of the lifting hydraulic cylinder 4 of the adjacent lower lifting platform; during the unfolding process of the telescopic tower structure 13 from the retracted state, the Mth lifting platform is detachably connected from top to bottom to the top of each tower layer whose top height is greater than or equal to the height of the Mth lifting platform.

[0097] The tower jacking device also includes guide columns, and each jacking platform is equipped with guide sleeves that slide in conjunction with the guide columns.

[0098] The clamping device includes an upper clamping unit 10 and a lower clamping unit 9. The upper clamping unit 10 can be used to provide vertical support for the connection structure between the tower and the turbine head 14. The lower clamping unit 9 can clamp the first layer of the tower.

[0099] The clamping device may include a pair of clamping beams for holding the connection between the innermost tower and the base of the wind turbine 14; corresponding to the connection between the innermost tower and the base of the wind turbine 14, each of the two opposite sides of the main frame structure 3 is provided with a slide rail extending along the side rail direction, and the pair of clamping beams spans across the slide rails on the two opposite sides and slides in cooperation with the slide rails; the opposing sides of the pair of clamping beams are provided with grooves; at each end of the slide rail is a drive device that causes the pair of clamping beams to move in opposite directions; the opposing sides of the pair of clamping beams are provided with grooves; during floating, the connection between the innermost tower and the base of the wind turbine 14 is located in the grooves of the pair of clamping beams and is held by the pair of clamping beams. The groove is V-shaped or arc-shaped; the surface of the groove is provided with an annular groove to accommodate the annular protrusion corresponding to the connection between the innermost tower and the base of the wind turbine 14.

[0100] The clamping device may also include a U-shaped frame, with rubber pads attached to the inside of the U-shaped frame, which is attached to the outer periphery of the lower tower of the wind turbine to limit the tilting and swaying of the tower relative to the main truss structure 3.

[0101] A cylindrical foundation limiting device 6 can also be installed on the main floating vessel 2. The cylindrical foundation limiting device 6 may include several limiting blocks and marine rigging, including anchor chains and anchor shackles. The limiting blocks are installed on the U-shaped hull and extend into the U-shaped hull. The top of the cylindrical foundation is provided with a limiting groove in conjunction with the limiting blocks. The limiting blocks extend into the limiting groove to restrict the cylindrical foundation from moving upward and rotating relative to the U-shaped hull. Both the U-shaped hull and the cylindrical foundation are provided with corresponding anchor chains. The anchor chains of the two are connected by anchor shackles to restrict the cylindrical foundation from moving up and down relative to the U-shaped hull.

[0102] The cylindrical foundation is a five-tube cylindrical foundation 11, which includes a central tube and four planetary tubes evenly distributed around the central tube. The four planetary tubes are partially embedded in the central tube. The four corner arc surfaces of the inner frame of the quadrilateral frame hull are connected to the outer periphery of the planetary tubes; the radius of the four corner arc surfaces of the inner frame of the quadrilateral frame hull is greater than the radius of the four planetary tubes.

[0103] The auxiliary floating vessel 7 is a K-shaped vessel. The K-shaped vessel has a rectangular top view with protrusions at both ends of one long side, and the opposite sides of the two protrusions are concave arc-shaped. The main floating vessel 2 has four U-shaped cavities to accommodate four cylindrical foundations 11. The K-shaped vessel and the U-shaped hull of the main floating vessel 2 can be connected by a convex-concave structure and then locked with pins, ensuring the stability of the cylindrical foundations 11, the retractable tower, and the entire structure during floating and installation.

[0104] The main truss structure is fixed above the deck of the main floating transport vessel 2. The auxiliary floating transport vessel 7 is equipped with an auxiliary truss structure 1. The auxiliary truss structure 1 and the main truss structure 3 can be detachably connected and are used to provide auxiliary support to the main truss structure 3.

[0105] During the floating process, the cylindrical foundation is fixedly connected to the main floating vessel 2.

[0106] A method for the integrated floating installation of multiple offshore wind turbine foundations, towers, and turbines 14 using the aforementioned integrated floating installation system, comprising the following steps:

[0107] Step 1: The first cylindrical foundation 11 is launched from the dock. The cylindrical foundation 11 is prefabricated in dock 8. The wind turbine support frame 12 is installed on the cylindrical foundation 11, and the gates are opened to release water. Once the water level reaches a certain height, the cylindrical foundation 11 begins to float independently. At this point, it is slowly pulled towards the dock opening using a winch until the cylindrical foundation 11 is successfully launched from the dock.

[0108] Step 2: Loading the first cylindrical foundation 11 onto the ship. The main floating transport vessel 2 is anchored at the exit of dock 8. After the cylindrical foundation 11 is undocking, it is hauled into the U-shaped cavity of a U-shaped hull by the towing equipment on the main floating transport vessel 2. The cylindrical foundation 11 is then welded and fixedly connected to the main floating transport vessel 2. At this stage, the weight of the cylindrical foundation 11 can be completely resisted by its own buoyancy, which helps to avoid the use of large lifting equipment. Welding is carried out before the tower is hoisted to ensure that there is no large heaving movement when hoisting the retractable tower structure 13, the wind turbine 14, and the blades 15.

[0109] Step 3: Loading the second cylindrical foundation 11. Load the second cylindrical foundation 11 into the U-shaped cavity of another U-shaped hull of the main floating transport vessel 2, which has the same opening direction as the U-shaped hull. Repeat Step 1 to Step 2 to complete the loading operation of the second cylindrical foundation 11.

[0110] Step 4: Loading the third cylindrical foundation 11. Rotate the main floating transport vessel 2 180° and load the third cylindrical foundation 11 onto the other side. Repeat Steps 1 and 2 to complete the loading of the third foundation.

[0111] Step 5: Load the fourth cylindrical foundation 11 onto the ship. Repeat Steps 1 and 2 to complete the loading of the fourth foundation onto the ship.

[0112] Step 6: Select the single-unit wind turbine installation mode and hoist the wind turbine 14 corresponding to the first cylindrical foundation 11. After the cylindrical foundation 11 is loaded onto the ship, begin hoisting the retractable tower structure 13, wind turbine 14, and blades 15 on the first cylindrical foundation 11. Then, use the truss structure to provide upper alignment for the overall structure of the first cylindrical foundation 11 and the wind turbine 14 on it.

[0113] Step 7: Hoist the wind turbine 14 equipment corresponding to the second cylindrical foundation 11. After the wind turbine 14 equipment of the first cylindrical foundation 11 is loaded onto the ship, the hoisting of the wind turbine 14 equipment on the second cylindrical foundation 11 on the same side begins, and then the truss structure provides upper support for the overall structure of the second cylindrical foundation 11 and the wind turbine 14 equipment on it.

[0114] Step 8: Hoist the wind turbine 14 equipment corresponding to the third cylindrical foundation 11. After the wind turbine 14 equipment of the second cylindrical foundation 11 is loaded onto the ship, rotate the U-shaped vessel 180° and begin hoisting the retractable tower, wind turbine 14 and blade 15 structure on the third cylindrical foundation 11 from the other side. Then, the truss structure provides upper alignment for the overall structure of the third cylindrical foundation 11 and the wind turbine 14 equipment on it.

[0115] Step 9: Hoisting the wind turbine 14 equipment corresponding to the fourth cylindrical foundation 11. After the wind turbine 14 equipment of the third cylindrical foundation 11 is loaded onto the ship, the hoisting of the wind turbine 14 equipment on the fourth cylindrical foundation 11 begins, and then the truss structure provides upper support for the overall structure of the fourth cylindrical foundation 11 and the wind turbine 14 equipment on it.

[0116] Step 10: Install the tower lifting device and tower sinking device on the main truss structure 3; connect the auxiliary floating transport vessel 7 to the open end of the U-shaped hull in sequence, build the auxiliary truss structure 1 on the auxiliary floating transport vessel 7, and connect the auxiliary truss structure 1 to the main truss structure 3; further provide lower lateral support for the overall structure of the cylindrical foundation 11-telescopic tower-wind turbine 14.

[0117] Step 11: Float the main floating transport vessel 2 to the target sea area. After the main floating transport vessel 2 is floated to the target sea area, prepare for sinking and installation, check and prepare the oil lines, electrical circuits, water pumps and related hydraulic systems, and ensure that each system is operating normally.

[0118] Step 12: The first complete unit structure is installed underwater. After the main floating transport vessel 2 is floated to the installation site and anchored, the connection between the first-layer tower and the clamping device is locked. The cylindrical foundation 11 is then pushed downwards to the target position on the seabed using the lowering hydraulic cylinder 5. During this process, the foundation is deflated, and the piston rod of the lowering hydraulic cylinder 5 extends downwards in coordination. The retractable tower structure 13 gradually extends and unfolds as the cylindrical foundation 11 sinks in the water until it contacts the seabed surface. Subsequently, the first-layer tower detaches from the clamping device.

[0119] Step 13: Install the first complete machine structure by sinking it into the seabed. Create a negative pressure environment by pumping water from each compartment inside the cylinder, then drive the cylindrical foundation 11 into the seabed. Continue until the cylindrical foundation 11 is fully installed, then detach the lowering hydraulic cylinder 5 from the lowering platform. Retract the piston rod of the lowering hydraulic cylinder 5.

[0120] Step 14: Perform the jacking and installation of the first complete unit structure. To ensure that the hub of wind turbine 14 reaches the design elevation, the jacking platform is raised using the jacking hydraulic cylinder 4, raising the upper tower and wind turbine 14 to the design elevation. The third tower layer is then connected and fixed to the second tower layer, the third tower layer is separated from the second jacking platform, the piston rod of the jacking hydraulic cylinder 4 is retracted, and the main hull proceeds to the next installation site to install the second complete unit structure.

[0121] Step 15: Repeat Steps 12 through 15. Complete the sinking and installation of the remaining parts of the machine structure within the U-shaped grooves.

[0122] The aforementioned cylindrical foundation, telescopic tower structure 13, wind turbine support frame 12, U-shaped hull, K-shaped vessel, auxiliary floating transport vessel 7, main truss structure 3, clamping device, tower lifting device, tower sinking device, auxiliary truss structure 1, lowering hydraulic cylinder 5, lowering platform, lifting platform, lifting hydraulic cylinder 4, guide column, guide sleeve, U-shaped frame, semi-circular clamp and clamp locking assembly, clamping beam, driving device for moving the pair of clamping beams in opposite directions, and five-tube cylindrical foundation 11 can all adopt existing structures and devices, or adopt existing structures and devices and construct them using conventional technical means.

[0123] The embodiments described above are only used to illustrate the technical ideas and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The patent scope of the present invention should not be limited by these embodiments. That is, any equivalent changes or modifications made in accordance with the spirit disclosed in the present invention still fall within the patent scope of the present invention.

Claims

1. A floating installation system for multiple foundations, towers, and wind turbines in an offshore wind power system, comprising multiple cylindrical foundations, with one set of wind power equipment installed on each cylindrical foundation; each cylindrical foundation is equipped with a negative pressure load adjustment system for controlling buoyancy; each set of wind power equipment includes a tower structure, a wind turbine, and blades connected in sequence, characterized in that... The tower structure is a telescopic tower structure, which includes N towers connected in sequence. The N towers are nested together in the retracted state. The innermost tower is connected to the wind turbine base; the base of the outermost tower is fixed to the cylindrical foundation through the wind turbine support frame. It also includes a main floating transport vessel composed of S pairs of U-shaped hulls, and 2S auxiliary floating transport vessels that can be detachably connected to the open ends of the U-shaped hulls. Each pair of U-shaped hulls is centrally symmetrically distributed. After the main floating transport vessel and the auxiliary floating transport vessels are connected, they form 2S quadrilateral frame ship units. The cross-section of the inner frame of each quadrilateral frame ship unit is a square with arc corners. During floating, each quadrilateral frame ship unit accommodates a cylindrical foundation in its inner frame, and the circumferential surface of the cylindrical foundation matches the four corner sides of the inner frame of the quadrilateral frame ship unit. The main floating transport vessel is equipped with a main truss structure. On the main truss structure, for each set of wind power equipment, there are: a clamping device for providing vertical clamping force for the wind power equipment; a tower lifting device for unfolding the telescopic tower structure from the retracted state; and a tower sinking device for maintaining uniform speed and verticality when the cylindrical foundation sinks. The auxiliary floating vessel is equipped with an auxiliary truss structure, which can be detached from the main truss structure and is used to provide auxiliary support to the main truss structure. The tower sinking device includes multiple hydraulic cylinders with piston rods extending downwards. The wind turbine support frame is equipped with first to T-level sinking platforms connected sequentially from bottom to top, where T≥2. During the sinking of the cylindrical foundation, the top of the piston rod of the sinking hydraulic cylinder is detachably connected to the first to T-level sinking platforms sequentially.

2. The offshore wind power multi-foundation, tower, and turbine integrated floating installation system according to claim 1, characterized in that, The tower lifting device includes first to Mth lifting platforms connected sequentially from bottom to top, where M≥2; each lifting platform includes multiple lifting hydraulic cylinders with piston rods extending upwards; the bottom of the upper lifting platform is fixedly connected to the top of the piston rod of the lifting hydraulic cylinder of the adjacent lower lifting platform; during the unfolding process of the telescopic tower structure from the retracted state, the Mth lifting platform is detachably connected from top to bottom to the top of each tower layer whose top height is greater than or equal to the height of the Mth lifting platform.

3. The offshore wind power multi-foundation, tower, and turbine integrated floating installation system according to claim 2, characterized in that, The tower jacking device also includes guide columns, and each jacking platform is equipped with guide sleeves that slide in conjunction with the guide columns.

4. The offshore wind power multi-foundation, tower, and turbine integrated floating installation system according to claim 1, characterized in that, The clamping device includes a pair of clamping beams for holding the connection between the innermost tower and the wind turbine base. Corresponding to the connection between the innermost tower and the wind turbine base, each of the two opposite sides of the main frame structure has a slide rail extending along the side rail direction. The pair of clamping beams spans the slide rails on the two opposite sides and slides with the slide rails. The opposing sides of the pair of clamping beams have grooves. At each end of the slide rail, there is a drive device that moves the pair of clamping beams in opposite directions. The opposing sides of the pair of clamping beams have grooves. During floating, the connection between the innermost tower and the wind turbine base is located in the groove of the pair of clamping beams and is clamped by the pair of clamping beams.

5. The offshore wind power multi-foundation, tower, and turbine integrated floating installation system according to claim 4, characterized in that, The groove is either figure-eight shaped or arc-shaped; the surface of the groove corresponds to the annular protrusion at the connection between the innermost tower and the wind turbine base, and is provided with an annular groove to accommodate the annular protrusion.

6. The offshore wind power multi-foundation, tower, and turbine integrated floating installation system according to claim 1, characterized in that, The cylindrical foundation is a five-tube cylindrical foundation, which includes a central tube and four planetary tubes evenly distributed around the central tube. The four planetary tubes are partially embedded in the central tube.

7. The offshore wind power multi-foundation, tower, and turbine integrated floating installation system according to claim 6, characterized in that, The inner frame of the quadrilateral frame hull has four curved corner surfaces that connect to the outer perimeter of the planetary cylinders; the radius of the curved corner surfaces of the inner frame of the quadrilateral frame hull is greater than the radius of the four planetary cylinders.

8. The offshore wind power multi-foundation, tower, and turbine integrated floating installation system according to claim 1, characterized in that, The auxiliary floating transport vessel is a K-shaped vessel. The top view of the K-shaped vessel is rectangular, and both ends of one of its long sides are protruding. The sides opposite the two protrusions are concave arcs.

9. The offshore wind power multi-foundation, tower, and turbine integrated floating installation system according to claim 1, characterized in that, 2S quadrilateral frame ship units are combined to form cross, square and rectangle shapes.

10. A method for the overall floating installation of multiple foundations, towers, and turbines for offshore wind power using the overall floating installation system for multiple foundations, towers, and turbines as described in any one of claims 1 to 9, characterized in that, The method includes the following steps: Step 1: The cylindrical foundation is prefabricated in the dock, and the wind turbine support frame is installed on the cylindrical foundation; the cylindrical foundation is put into a self-floating state and is pulled out of the dock by a winch; the main floating transport vessel is anchored and positioned at the dock exit; Step 2: Using a traction device, the cylindrical foundation is sequentially introduced into the U-shaped hull opening of the main floating transport vessel; the cylindrical foundation is then connected to the main floating transport vessel; the main truss structure is then erected on the main floating transport vessel. Step 3: Depending on the dock conditions, select either the single-unit wind turbine installation mode or the dual-unit wind turbine installation mode. Single wind turbine installation mode: A retractable tower structure is hoisted onto a cylindrical foundation within a U-shaped hull. The base of the outermost tower is fixed to the wind turbine support frame. A clamping device is installed on the main truss structure. The wind turbine is then hoisted, connecting the innermost tower to the wind turbine base, with the clamping device holding the wind turbine. During the installation of the wind power equipment, the buoyancy of the cylindrical foundation is adjusted by a negative pressure load adjustment system, balancing the upward buoyancy and downward gravity on the cylindrical foundation, thus maintaining its self-floating state. Dual-unit wind turbine installation mode: Simultaneously hoist two retractable tower structures to the cylindrical foundation within a pair of U-shaped hulls. Simultaneously, the base of the outermost tower of each retractable tower structure is fixed to the wind turbine support frame. Clamping devices are installed on the main truss structure. Two wind turbines are hoisted simultaneously, with the innermost tower connected to the turbine base, and the clamping devices holding the wind turbine equipment. During the installation of the wind power equipment, the buoyancy of the cylindrical foundation is adjusted by the negative pressure load adjustment system, balancing the upward buoyancy and downward gravity on the cylindrical foundation, thus maintaining its self-floating state. Step 4: Repeat step 3 until a wind turbine is installed on all cylindrical foundations; Step 5: Install the tower lifting device and tower lowering device on the main truss structure; Step 6: Connect the 2S auxiliary floating vessels to the open end of the U-shaped hull in sequence, build the auxiliary truss structure on the auxiliary floating vessels, and connect the auxiliary truss structure to the main truss structure. Step 7: The main floating transport vessel is towed by a tugboat to the target sea area; Step 8: Float the main floating transport vessel to the wind turbine installation site, anchor and position the main floating transport vessel, select a cylindrical foundation located on the relatively outer perimeter for sinking, and use the lowering hydraulic cylinder of the tower sinking device to push the cylindrical foundation downwards. During the sinking process of the cylindrical foundation, the negative pressure load adjustment system of the cylindrical foundation and the lowering hydraulic cylinder are coordinated and controlled to control the extension length and extension speed of the piston rod of the lowering hydraulic cylinder; at the same time, ensure that the difference between the upward buoyancy force and the downward gravity force on the cylindrical foundation is ≤ (weight of the wind turbine + weight of the wind turbine support frame) × 1%; the top of the piston rod of the lowering hydraulic cylinder is detachably connected to the corresponding first to Tth layer lowering platforms in sequence until the cylindrical body of the cylindrical foundation contacts the seabed surface; the retractable tower on it gradually extends and unfolds as the cylindrical foundation sinks in the water; Step 9: Using the negative pressure load adjustment system, a negative pressure environment is created for the cylindrical foundation, allowing it to penetrate into the seabed until it is fully settled into place. Then, the piston rod of the lowering hydraulic cylinder is separated from the lowering platform of the Tth layer. The piston rod of the lowering hydraulic cylinder rises and resets; Step 10: Separate the innermost tower cylinder from the clamping device on the cylindrical foundation, and detachably connect the M-level lifting platform to the top of each tower cylinder from top to bottom. Extend the piston rods of the lifting hydraulic cylinders of each lifting platform upwards sequentially from bottom to top, so that each tower cylinder is fully extended. After each tower cylinder is fully extended, first fix the bottom of the tower cylinder to the top of the tower cylinder below it, then connect the M-level lifting platform to the top of the tower cylinder below it, and then extend the piston rods of the lifting hydraulic cylinders of each lifting platform upwards sequentially. Continue until all tower cylinders are fully extended and adjacent tower cylinders are fixed to each other. Step 11: Separate the auxiliary floating transport vessel and its auxiliary truss structure surrounding the cylindrical foundation from the main floating transport vessel and the main truss structure. The main floating transport vessel is driven away from the cylindrical foundation, and after it is driven away, the auxiliary floating transport vessel and its auxiliary truss structure are connected to the main floating transport vessel and the main truss structure. Step 12: Repeat steps 8 to 11 to successively sink and fix all wind power equipment on the seabed and ensure that the wind turbine positions reach the design elevation. Step 13: Tow the main floating transport vessel back to the dock.

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