Mounting platform for floating fan and mounting method of floating fan

Abstract

The invention discloses a mounting platform for a floating fan and a mounting method of the floating fan, and relates to the technical field of ocean engineering. The mounting platform comprises a ship body, pile legs, floating boxes and a lifting mechanism; the ship body is provided with a deck used for bearing the floating type draught fan foundation. The multiple pile legs and the multiple buoyancy tanks are arranged, all the buoyancy tanks are arranged on the ship body, and the pile legs are arranged in the buoyancy tanks in a penetrating mode. The lifting mechanism is used for driving the pile legs to ascend and descend relative to the ship body so as to lift the ship body from a floating state to a preset height away from the water surface. The ship body and the floating type draught fan foundation are lifted out of the water surface together, a rigid fixed operation platform which is completely not affected by sea waves is formed, draught fan installation is conducted on the platform, and the problems that in a traditional installation mode, butt joint is difficult, the safety risk is high and the efficiency is low due to foundation shaking are fundamentally solved. In addition, during installation, only the pile legs need to touch the seabed, expensive foundation treatment is not needed, and the application sea area range of floating type draught fan installation operation is widened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ocean engineering, and more particularly, to an installation platform for a floating wind turbine and a floating wind turbine installation method. BACKGROUND

[0002] With the development of offshore wind power to the deep sea, floating wind turbines have become an important technical direction. However, the installation of floating wind turbines faces great challenges, the key of which lies in how to accurately and safely install the wind turbine components, such as the tower, the nacelle and the blades, weighing several thousand tons, on the floating foundation in the turbulent sea environment.

[0003] There are mainly two kinds of traditional floating wind turbine installation methods. One is to temporarily moor the floating wind turbine foundation, and use a floating crane or a jack-up platform to install the wind turbine. The other is to sink the floating wind turbine foundation (directly on the seabed), and then use a floating crane or a jack-up platform to install the wind turbine. The former has low installation efficiency due to the inevitable sway of the floating wind turbine foundation in the mooring state. The latter has high requirements for water depth and surface geology, and in some cases, artificial foundations or foundation treatment are required, which is time-consuming and laborious, and has poor installation effect.

[0004] Therefore, how to improve the installation efficiency and safety of floating wind turbines while taking into account the stability of the operation and the adaptability of the sea area has become a technical problem to be solved by those skilled in the art. SUMMARY

[0005] Therefore, the purpose of the present application is to provide an installation platform for a floating wind turbine to improve the installation efficiency and safety of floating wind turbines while taking into account the stability of the operation and the adaptability of the sea area.

[0006] Another purpose of the present application is to provide a floating wind turbine installation method suitable for the above-mentioned installation platform for a floating wind turbine.

[0007] To achieve the above-mentioned purposes, the present application provides the following technical solutions:

[0008] An installation platform for a floating wind turbine, comprising:

[0009] a hull having a deck for carrying a floating wind turbine foundation, and the hull being capable of being submerged and floated by ballast;

[0010] a plurality of pontoons, each of which being arranged on the hull;

[0011] a plurality of legs, each of which being arranged in the pontoons;

[0012] a lifting mechanism adapted to the pile legs and configured to drive the pile legs to perform lifting motion relative to the hull to lift the hull from a floating state to a preset height above the water surface.

[0013] Optionally, in the mounting platform, the bottom of the pile leg is provided with a pile shoe.

[0014] Optionally, in the mounting platform, the bottom of the floating box is provided with a groove for accommodating the pile shoe when the pile leg is retracted.

[0015] Optionally, in the mounting platform, at least one hoisting device is further included and mounted on the hull.

[0016] Optionally, in the mounting platform, the hoisting device is a pile-rotating crane, and two pile-rotating cranes are provided, respectively mounted on two oppositely arranged pile legs.

[0017] Optionally, in the mounting platform, each floating box is symmetrically arranged around the hull.

[0018] Optionally, in the mounting platform, the pile leg is a cylindrical leg, and the lifting mechanism is a hydraulic bolt type lifting mechanism matched with the cylindrical leg.

[0019] Optionally, in the mounting platform, the pile leg is a truss leg, and the lifting mechanism is a rack and pinion type lifting mechanism matched with the truss leg.

[0020] A floating wind turbine installation method, applicable to the mounting platform for floating wind turbine as claimed in any one of the above, comprising:

[0021] Submersion loading, in the target operation water area, by injecting water into the floating box to submerge the hull until the deck of the hull is below the water surface, and moving the floating wind turbine foundation to be installed above the deck of the hull;

[0022] Lifting fixation, by discharging water from the floating box to make the hull float up and lift the floating wind turbine foundation, and by driving the pile legs to be lowered by the lifting mechanism until touching the seabed and making the hull and the floating wind turbine foundation to be lifted above the water surface;

[0023] Installation operation, installing the wind turbine on the floating wind turbine foundation, the wind turbine comprising a tower, a nacelle and blades.

[0024] The submersion release, lifting the pile legs by the lifting mechanism until the hull is lowered to the water surface, and separating the floating wind turbine foundation from the deck of the hull by injecting water into the floating box to submerge the hull.

[0025] Optionally, in the above floating wind turbine installation method, in the step of the installation operation, the tower, the nacelle and the blades are hoisted onto the floating wind turbine foundation in sequence by hoisting equipment arranged on the hull.

[0026] The installation platform for floating wind turbine provided by the present application can place the floating wind turbine foundation on the deck of the hull, and drive the pile legs to extend into the seabed by the lifting mechanism, so that the hull and the floating wind turbine foundation are lifted out of the water surface at the same time to form a rigid fixed operation platform, thereby facilitating the installation of the wind turbine. After the installation of the wind turbine is completed, the hull and the floating wind turbine foundation can be quickly separated by retracting the pile legs and injecting water into the floating box. As can be seen from the above example, the installation platform for floating wind turbine provided by the present application can lift the hull together with the floating wind turbine foundation out of the water surface to form a rigid fixed operation platform that is completely unaffected by waves, and the installation of the wind turbine is carried out on this platform, thereby fundamentally solving the problems of docking difficulty, high safety risk and low efficiency caused by the foundation sway in the traditional installation method. In addition, only the pile legs need to be able to reach the seabed during installation, and the requirements for water depth and the flatness and bearing capacity of seabed geology are much lower than those of the traditional scheme, so expensive foundation treatment is not required, and the applicable sea area range of floating wind turbine installation operation is significantly widened. At the same time, the installation platform integrates multiple functions such as bearing, transfer, fixed installation and finished product release of the floating foundation, simplifies the complex process of collaborative operation of multiple ships with different functions in the traditional installation scheme, and reduces the difficulty of organization and coordination and the comprehensive cost.

[0027] The technical features mentioned above, the technical features to be mentioned below, and the technical features shown in the drawings alone can be combined with each other arbitrarily, as long as the combined technical features are not contradictory to each other. All feasible combinations of features are explicitly described herein. Any one of the multiple sub-features contained in the same sentence can be applied independently, and does not have to be applied together with other sub-features. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, a brief introduction will be given below to the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0029] Figure 1A front view of the installation platform provided by the embodiment of the present application;

[0030] Figure 2 A side view of the installation platform provided by the embodiment of the present application;

[0031] Figure 3 A top view of the installation platform provided by the embodiment of the present application;

[0032] Figure 4 A schematic diagram of the installation platform in place provided by the embodiment of the present application;

[0033] Figure 5 A schematic diagram of the installation platform diving under ballast provided by the embodiment of the present application;

[0034] Figure 6 A schematic diagram of the floating wind turbine foundation towing the installation platform provided by the embodiment of the present application Figure 1 ;

[0035] Figure 7 A schematic diagram of the floating wind turbine foundation towing the installation platform provided by the embodiment of the present application Figure 2 ;

[0036] Figure 8 A schematic diagram of the installation platform and the floating wind turbine foundation floating provided by the embodiment of the present application;

[0037] Figure 9 A schematic diagram of the installation platform and the floating wind turbine foundation rising provided by the embodiment of the present application;

[0038] Figure 10 A schematic diagram of the wind turbine installation provided by the embodiment of the present application;

[0039] Figure 11 A schematic diagram of the installation platform retracting the pile legs provided by the embodiment of the present application;

[0040] Figure 12 A schematic diagram of the installation platform diving and releasing provided by the embodiment of the present application;

[0041] Figure 13 A schematic diagram of the floating wind turbine foundation and the installation platform separating provided by the embodiment of the present application;

[0042] Figure 14 A flowchart of the floating wind turbine installation method provided by the embodiment of the present application.

[0043] Wherein, 100 is the installation platform, 10 is the ship body, 20 is the floating box, 21 is the groove, 30 is the pile leg, 31 is the pile shoe, 40 is the lifting mechanism, 50 is the hoisting equipment, 200 is the floating wind turbine foundation, 201 is the wind turbine, and 300 is the tugboat. DETAILED DESCRIPTION

[0044] The core of the present application is to provide an installation platform for floating wind turbines, which can improve the installation efficiency and safety of floating wind turbines, and can also take into account the stability of the operation and the adaptability of the sea area.

[0045] Another core of the present application is to provide a floating wind turbine installation method suitable for the installation platform for floating wind turbines.

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0047] There are mainly two kinds of traditional floating wind turbine installation methods. One is to temporarily moor and fix the floating wind turbine foundation, and use a floating crane ship or a self-elevating platform to install the wind turbine. The other is to sink the floating wind turbine foundation (directly on the seabed), and then use a floating crane ship or a self-elevating platform to install the wind turbine. The former has a corresponding swing of the floating wind turbine foundation in the mooring state, and the installation efficiency of the wind turbine is low. The latter has high requirements for water depth and surface geological conditions, and in some cases, artificial foundations or foundation treatment are required, which is time-consuming and laborious, and the installation effect is poor.

[0048] Therefore, as shown in the drawings, Figure 1 The present application discloses an installation platform 100 for floating wind turbines, which comprises a ship body 10, a floating box 20, a pile leg 30 and a lifting mechanism 40. By lifting the ship body 10 together with the floating wind turbine foundation 200 out of the water, a rigid fixed work platform completely unaffected by waves is formed, and the wind turbine installation is carried out on this platform, which fundamentally solves the problems of docking difficulty, high safety risk and low efficiency caused by the swing of the foundation in the traditional installation method. In addition, during installation, only the pile leg 30 needs to be able to reach the seabed, which has much lower requirements for water depth and the flatness and bearing capacity of the seabed geology than the traditional scheme, and does not need expensive foundation treatment, which significantly widens the applicable sea area range of floating wind turbine installation operation. At the same time, the installation platform 100 integrates the functions of bearing, transferring, fixing and installing the floating foundation, and releasing the finished product, simplifies the complex process of collaborative operation of multiple ships with different functions in the traditional installation scheme, and reduces the difficulty of organization and coordination and the comprehensive cost.

[0049] The installation platform 100 for floating wind turbines disclosed in the embodiments of the present application will be explained and described in detail below. Figures 1 to 13 The installation platform 100 for floating wind turbines disclosed in the embodiments of the present application will be explained and described in detail below.

[0050] As shown in Figures 1 to 3 , the hull 10 serves as the load-bearing structure of the entire installation platform 100, which can be a large barge with a wide, flat and strong deck. Among them, the deck of the hull 10 can carry a floating wind turbine foundation 200 weighing up to several thousand tons.

[0051] As shown in Figures 1 to 3 , in order to realize the semi-submersible function of the installation platform 100, a plurality of pontoons 20 can be provided on the hull 10, i.e. two, three or more pontoons 20, and each pontoon 20 can be symmetrically arranged around the hull 10, and each pontoon 20 can be connected through a pipeline system, a high-power ballast pump and a valve, and integrated with a central control system. The operator can accurately control the water injection or drainage capacity of each pontoon 20 in the central control room through the system, so as to realize the submersion and floating of the hull 10 as a whole, and can accurately adjust the draft and longitudinal and transverse inclination of the installation platform 100. It should be noted that in order to realize the semi-submersible function of the installation platform 100, the hull 10 can also be divided into a plurality of independent ballast tanks, and the ballast tanks can be connected through a pipeline system, a high-power ballast pump and a valve, and integrated with a central control system. The operator can accurately control the water injection or drainage capacity of each ballast tank in the central control room through the system, so as to realize the submersion and floating of the hull 10 as a whole, and can accurately adjust the draft and longitudinal and transverse inclination of the installation platform 100.

[0052] As shown in Figures 1 to 3 , the pile legs 30 can be multiple, i.e. two, three or more pile legs 30, and the interior of the pontoon 20 is provided with a through pile leg installation passage, so that the pile leg 30 can be arranged in the pile leg installation passage of the pontoon 20, and the pile leg 30 can be guided to rise and fall. In addition, the lifting mechanism 40 can be arranged on the pontoon 20, and the lifting mechanism 40 can be adapted to the pile leg 30, i.e. one lifting mechanism 40 is arranged corresponding to each pile leg 30, so as to drive the pile leg 30 to rise and fall relative to the hull 10 through the lifting mechanism 40, so as to lift the hull 10 from the floating state to a predetermined height away from the water surface.

[0053] In some embodiments, as shown in Figures 1 to 3 , the pontoon 20 can adopt a box-shaped structure with high reserve buoyancy, so as to provide an installation base for the pile leg 30 and the lifting mechanism 40, and can provide additional buoyancy support for them. Among them, the pontoon 20 can be four, and the four pontoons 20 are symmetrically arranged at the four corners of the rectangular hull 10, and are firmly connected with the hull 10 as a whole through welding or the like, so as to ensure the stability of the submersion and floating of the hull 10 as a whole.

[0054] In some embodiments, as shown in Figures 1 to 3As shown, the four pile legs 30 can be adapted to the pontoons 20, and each pile leg 30 is arranged in the pile leg mounting passage of the corresponding pontoon 20. The pile leg 30 is the main component of the installation platform 100 standing and lifting, which can be made of high-strength special steel, and the length of the pile leg 30 can be determined according to the maximum expected working water depth. At the same time, each pontoon 20 is provided with a lifting mechanism 40, and the lifting mechanism 40 can drive the pile leg 30 arranged in the pile leg mounting passage to move up and down relative to the hull 10. When the pile leg 30 is lowered to the seabed, the lifting mechanism 40 continues to work, and the entire hull 10 together with the load thereon can be lifted upward along the pile leg 30 from the floating state until completely separated from the water surface to reach a preset height not affected by the waves. It should be noted that the four lifting mechanisms 40 can be cooperatively controlled by a synchronous control system to ensure that the hull 10 always remains horizontal during lifting to avoid the risk of tilting.

[0055] In some embodiments, as shown in FIG. 2, the bottom of each pontoon 20 is provided with a recess 21 capable of accommodating the corresponding pile shoe 31. When the pile leg 30 is completely retracted by the lifting mechanism 40, the pile shoe 31 can be embedded in the recess 21, so that the bottom surface of the pontoon 20 is smoother to reduce the sailing resistance. Figures 1 to 3 In some embodiments, as shown in FIG. 2, the bottom of each pontoon 20 is provided with a recess 21 capable of accommodating the corresponding pile shoe 31. When the pile leg 30 is completely retracted by the lifting mechanism 40, the pile shoe 31 can be embedded in the recess 21, so that the bottom surface of the pontoon 20 is smoother to reduce the sailing resistance.

[0056] Figures 1 to 3 In some embodiments, as shown in FIG. 2, the bottom of each pontoon 20 is provided with a recess 21 capable of accommodating the corresponding pile shoe 31. When the pile leg 30 is completely retracted by the lifting mechanism 40, the pile shoe 31 can be embedded in the recess 21, so that the bottom surface of the pontoon 20 is smoother to reduce the sailing resistance.

[0057] In some embodiments, as shown in FIG. 2, the bottom of each pontoon 20 is provided with a recess 21 capable of accommodating the corresponding pile shoe 31. When the pile leg 30 is completely retracted by the lifting mechanism 40, the pile shoe 31 can be embedded in the recess 21, so that the bottom surface of the pontoon 20 is smoother to reduce the sailing resistance. Figures 1 to 3 ​As shown, the pile legs 30 can adopt cylindrical legs, i.e., the main bodies of the pile legs 30 can adopt thick-walled steel pipes with large diameters, and the outer surfaces thereof are smooth, so that the pile legs 30 can have good hydrodynamic characteristics. In addition, annular racks are machined or welded on the outer walls of the cylindrical legs along the length direction thereof, and the lifting mechanism 40 can adopt a hydraulic pin type lifting mechanism matched with the cylindrical legs. The hydraulic pin type lifting mechanism can include one or more lifting hydraulic cylinders, a movable locking mechanism capable of being synchronously lifted with the piston rods of the cylinders, and a fixed locking mechanism fixed on the structure of the floating box 20, and the movable locking mechanism and the fixed locking mechanism can each include several pins capable of being driven to extend or retract by hydraulic pressure. When lifting the hull 10, first, the pins of the movable locking mechanism extend and engage with one of the annular racks on the cylindrical legs; then, the piston rods of the lifting hydraulic cylinders extend, push the movable locking mechanism upward, and thus lift the entire hull 10 by one stroke; after being lifted to the position, the pins of the fixed locking mechanism extend and engage with the annular racks at the corresponding positions on the cylindrical legs, to firmly lock the current position of the hull 10; subsequently, the pins of the movable locking mechanism retract and disengage from the cylindrical legs; finally, the piston rods of the lifting hydraulic cylinders retract, and drive the movable locking mechanism to descend to the next working position, to prepare for the next round of lifting, so that the hull 10 can be stepwise lifted to the preset height by continuously repeating the above process. It should be noted that the insertion holes matched with the pins of the movable locking mechanism and the fixed locking mechanism can also be machined on the outer walls of the cylindrical legs along the length direction thereof, to achieve the effect of stepwise lifting of the hull 10.

[0058] In some embodiments, the pile legs 30 can also adopt truss legs, i.e., the main bodies of the pile legs 30 are space truss structures formed by welding a plurality of steel pipes according to a specific triangular or quadrilateral grid pattern, so that the weight of the installation platform 100 can be significantly reduced, and the power of the lifting mechanism 40 and the floating force of the hull 10 can be reduced, to reduce the cost. In addition, high-precision racks are fixedly welded on one or more main chords of the truss legs along the length direction of the truss legs, and the lifting mechanism 40 can adopt a rack and pinion type lifting mechanism. The rack and pinion type lifting mechanism can include a driving motor, a speed reduction gear box, and a driving gear engaged with the rack. When the lifting mechanism 40 works, the power output by the driving motor is reduced in speed and increased in torque by the gear box, the driving gear rotates, and since the gear is engaged with the rack fixed on the pile leg 30, the rotation of the gear is converted into linear motion along the direction of the pile leg, so that the hull 10 is smoothly and continuously lifted relative to the truss leg. It should be noted that a plurality of rack and pinion type lifting mechanisms can be synchronously controlled by frequency conversion, to achieve extremely high-precision synchronous control, so that the lifting process is still smooth without impact and vibration when the installation platform 100 bears the super-heavy floating wind turbine foundation 200, to provide a stable operation space for subsequent precise installation operations.

[0059] In some embodiments, as shown in Figures 1 to 3 In order to facilitate the installation of the wind turbine 201, the installation platform 100 can further include at least one hoisting device 50, i.e., one, two or more hoisting devices 50 can be used, and the hoisting device 50 can be installed on the hull 10, so that the installation of the wind turbine 201 can be facilitated without the need for an additional hoisting vessel, thereby reducing the installation cost of the wind turbine 201.

[0060] In some embodiments, as shown in Figure 3 The hoisting device 50 can be a pile-encircling crane, and two pile-encircling cranes can be used, which can be installed on two oppositely arranged pile legs 30, i.e., at the diagonal positions of the hull 10, so that the pile-encircling cranes can be conveniently dispatched to avoid the floating wind turbine foundation 200, so that a space for placing the floating wind turbine foundation 200 can be formed on the deck of the hull 10, and the floating wind turbine foundation 200 can be towed onto the deck of the hull 10.

[0061] The installation platform 100 for the floating wind turbine disclosed in the embodiments of the present application can place the floating wind turbine foundation 200 on the deck of the hull 10, and the pile legs 30 can be driven into the seabed by the lifting mechanism 40, so that the hull 10 and the floating wind turbine foundation 200 can be simultaneously lifted out of the water to form a rigid fixed work platform, thereby facilitating the installation of the wind turbine. After the installation of the wind turbine is completed, the pile legs 30 can be retracted and the floating box 20 can be filled with water, so that the hull 10 and the floating wind turbine foundation 200 can be quickly separated.

[0062] The installation platform 100 for the floating wind turbine disclosed in the embodiments of the present application can lift the hull 10 together with the floating wind turbine foundation 200 out of the water to form a rigid fixed work platform that is completely unaffected by waves, and the installation of the wind turbine can be performed on this platform, thereby fundamentally solving the problems of docking difficulty, high safety risk and low efficiency caused by the swaying of the foundation in the traditional installation method. In addition, during installation, only the pile legs 30 need to be able to reach the seabed, and the requirements for water depth and the flatness and bearing capacity of the seabed geology are much lower than those of the traditional scheme, and expensive foundation treatment is not required, thereby significantly widening the applicable sea area range of the floating wind turbine installation work. At the same time, the installation platform 100 integrates multiple functions such as bearing, transfer, fixed installation and product release of the floating foundation, simplifies the complex process of the traditional installation scheme which requires multiple vessels with different functions to work cooperatively, and reduces the difficulty of organization and coordination and the comprehensive cost.

[0063] As shown in Figure 14As shown, the embodiments of the present application also disclose a floating wind turbine installation method, which is suitable for the installation platform 100 for floating wind turbine disclosed in the above embodiments, and thus has all the technical effects of the installation platform 100 for floating wind turbine disclosed above, which will not be repeated here. The floating wind turbine installation method can include the steps of S100, submerging loading, S200, lifting and fixing, S300, installation operation, and S400, submerging and releasing. The following will be described in combination with the drawings. Figures 4 to 14 The floating wind turbine installation method disclosed in the embodiments of the present application will be explained and described in detail.

[0064] Step S100, submerging loading;

[0065] In the target operation water area, the ship body 10 is submerged by injecting water into the floating box 20 until the deck of the ship body 10 is below the water surface, and the floating wind turbine foundation 200 to be installed is transported to above the deck of the ship body 10. Specifically, the installation platform 100 is navigated to the target operation water area with the assistance of the tugboat. After reaching the designated position, the installation platform 100 can be positioned by its own anchoring system, such as Figure 4 As shown. Then, the central control system starts the ballast pump to inject seawater into each floating box 20 of the ship body 10. As the amount of ballast water increases, the installation platform 100 submerges stably as a whole until the deck of the ship body 10 is below the water surface, such as Figure 5 As shown. At this time, as shown in Figure 6 and Figure 7 The floating wind turbine foundation 200 to be installed is towed by the tugboat 300 to above the deck of the ship body 10.

[0066] Step S200, lifting and fixing;

[0067] By draining the water in the pontoons 20, the hull 10 is floated and the floating wind turbine foundation 200 is lifted, and the pile legs 30 are driven down by the lifting mechanism 40 until they touch the seabed and the hull 10 and the floating wind turbine foundation 200 are lifted above the water surface. Specifically, the central control system starts the drainage program, and the seawater in the pontoons 20 is drained by the ballast pumps. With the recovery of the buoyancy, the hull 10 begins to float, and its deck smoothly contacts and lifts the floating wind turbine foundation 200 from below until the floating wind turbine foundation 200 is completely lifted off the water surface and stably carried on the deck of the hull 10. After that, the lifting mechanism 40 is started to drive the pile legs 30 down until the pile shoes 31 at the bottom of the pile legs 30 touch the seabed. At the same time, the sensors on the pile shoes 31 will feed back the bottom-touching signal and pressure data to the central control system. After confirming that all the pile legs 30 have stably touched the bottom and reached a certain degree of pre-compaction, the lifting mechanism 40 continues to operate, at which time the hull 10 together with the floating wind turbine foundation 200 carried thereon is lifted vertically upward along the pile legs 30 that have touched the bottom until the bottom of the hull 10 is completely separated from the water surface and forms a sufficient safety gap with the wave crest of the highest wave that may occur, so that the entire installation platform 100 forms a completely stationary, rigidly fixed work plane that is not affected by any wind, wave and current, thus creating ideal installation conditions for subsequent high-precision installation work.

[0068] Step S300, installation work;

[0069] The wind turbine 201 is installed on the floating wind turbine foundation 200, and the wind turbine 201 includes a tower, a nacelle and blades. Specifically, one or more transport barges are used to transport the tower, the nacelle and the blades of the wind turbine 201 to one side of the installation platform 100, and then the tower, the nacelle and the blades are hoisted in sequence to the floating wind turbine foundation 200 by the hoisting equipment 50 on the installation platform 100. During hoisting of the tower, the nacelle and the blades, the hoisting equipment 50 first hoists the tower in sections or as a whole to the flange interface of the floating wind turbine foundation 200, and the connection and fastening of high-strength bolts are completed by workers; then the hoisting equipment 50 hoists the nacelle and accurately installs it on the top of the tower; finally, the three blades are hoisted one by one or in the form of a combined piece to the hub of the nacelle. During the entire installation process, the work platform is completely stationary, so the accuracy and safety of hoisting and docking can be guaranteed, and the work efficiency is improved.

[0070] Step S400, submersion and release;

[0071] The pile legs 30 are lifted by the lifting mechanism 40 until the hull 10 is lowered to the water surface, and the hull 10 is submerged by injecting water into the pontoons 20, and the floating wind turbine foundation 200 is separated from the deck of the hull 10. Specifically, when the installation of the wind turbine 201 is completed, the pile legs 30 are lifted by the lifting mechanism 40 to stably lower the hull 10 until it re-enters the floating state. Then, the lifting mechanism 40 completely retracts the pile legs 30 to store the pile shoes 31 in the grooves 21 at the bottom of the pontoons 20, at which time the installation platform 100 returns to the floating navigation mode. Then, the ballast system is started again to inject water into the pontoons 20 to submerge the installation platform 100 as a whole until the floating wind turbine foundation 200 is separated from the deck of the hull 10. After the installation platform 100 continues to submerge to a safe depth, the floating wind turbine can be towed by the tugboat 300 to the target wind farm in the open sea for final mooring and grid connection operations.

[0072] The terminology used in the above-described embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in this specification and the appended claims, the singular forms "a," "an" and "the" are intended to include both singular and plural forms, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. As used herein, the term "one or more" means one, two, three, four, or more, and the like.

[0073] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" or "in other embodiments" or "in some embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment, unless otherwise specifically stated. The terms "including," "comprising," "having" and variations thereof are meant to encompass the items listed thereafter, but do not exclude other items from being present.

[0074] The plural of a term means two or more of the item. For example, a plurality of items means two or more of the item. The terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The terms "a" and "an" and "the" and "said" and "this" and similar relations are intended to mean one or more than one, unless otherwise indicated.

[0075] The "parallel" and "perpendicular" referred to in the present application are "substantially parallel" and "substantially perpendicular" in actual operation. The "substantially parallel" can be understood as parallel with certain error, and the "substantially perpendicular" can be understood as perpendicular with certain error.

[0076] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mounting platform for a floating wind turbine, characterized in that, The installation platform (100) for floating wind turbine foundation according to any one of claims 1-8, comprising: a hull (10) having a deck for carrying a floating wind turbine foundation (200), and the hull (10) is capable of submerging and surfacing by ballast; a plurality of pontoons (20) arranged on the hull (10); a plurality of legs (30) arranged in the pontoons (20); a lifting mechanism (40) adapted to the legs (30) for driving the legs (30) to move up and down relative to the hull (10) to lift the hull (10) from a floating state to a predetermined height above the water surface.

2. The mounting platform of claim 1, wherein, The bottom of the leg (30) is provided with a shoe (31).

3. The mounting platform of claim 2, wherein, The bottom of the pontoon (20) is provided with a groove (21) for accommodating the shoe (31) when the leg (30) is retracted.

4. The mounting platform of claim 1, wherein, Further comprising at least one hoisting device (50) mounted on the hull (10).

5. The mounting platform of claim 4, wherein, The hoisting device (50) is a pile-around crane, and there are two pile-around cranes, each mounted on an oppositely arranged leg (30).

6. The mounting platform of claim 1, wherein, Each pontoon (20) is symmetrically arranged around the hull (10).

7. The mounting platform of claim 1, wherein, The leg (30) is a cylindrical leg, and the lifting mechanism (40) is a hydraulic bolt type lifting mechanism matched with the cylindrical leg.

8. The mounting platform of claim 1, wherein, The leg (30) is a truss leg, and the lifting mechanism (40) is a rack and pinion type lifting mechanism matched with the truss leg.

9. A floating wind turbine installation method characterised by, The installation platform (100) for floating wind turbine foundation according to any one of claims 1-8, comprising: submersion loading, in the target operating water area, by injecting water into the pontoons (20) to submerge the hull (10) until the deck of the hull (10) is below the water surface, and moving the floating wind turbine foundation (200) to be installed above the deck of the hull (10); lifting fixation, by draining water from the pontoons (20) to make the hull (10) float up and lift the floating wind turbine foundation (200), and by driving the legs (30) to lower through the lifting mechanism (40) until they touch the seabed and lift the hull (10) and the floating wind turbine foundation (200) above the water surface; installation operation, installing a wind turbine (201) on the floating wind turbine foundation (200), the wind turbine (201) comprising a tower, a nacelle and blades; submersion release, lifting the legs (30) through the lifting mechanism (40) until the hull (10) is lowered to the water surface, and by injecting water into the pontoons (20) to submerge the hull (10) and separate the floating wind turbine foundation (200) from the deck of the hull (10).

10. The floating wind turbine installation method of claim 9, wherein, In the step of the installation operation, the tower, the nacelle and the blades are hoisted in sequence onto the floating wind turbine foundation (200) through the hoisting device (50) arranged on the hull (10).

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