CN219172632U - Floating platform for offshore wind turbine - Google Patents

Abstract

The application discloses a floating platform for offshore wind turbine, this floating platform includes: a fan body, a truss platform, and at least one pontoon assembly; the fan main body is fixedly arranged at the center of the top of the truss platform, and the truss platform can be submerged below the sea level; the pontoon assembly is disposed at the bottom of the truss platform for providing buoyancy to the truss platform. So, provide buoyancy for truss platform through the flotation pontoon subassembly, regard as the braced platform of offshore wind turbine through truss platform, on the one hand, compare in the traditional offshore operation platform that adopts hull to mount the flotation pontoon, need not to rely on hull self-size, can select suitable floating platform size by oneself based on the demand to modular floating platform also expands more easily. On the other hand, truss platforms that are buoyant by the pontoon assemblies have lighter weight and lower manufacturing costs than steel spar structure pontoons.

Description

Floating platform for offshore wind turbine

Technical Field

The application relates to the technical field of wind power generation, in particular to a floating platform for an offshore wind turbine.

Background

With the gradual trend of new energy utilization towards the sea, offshore power generation platforms are more and more favored, the existing offshore floating platforms are usually steel column-type structural floating bodies, and fans are fixed on the upper parts of the floating bodies. Or the floating body platform effect is realized by mounting floating bodies on two sides of the ship body.

However, the steel upright post structure is usually heavy, the material and construction cost are high, and the whole platform is not easy to expand by utilizing the ship body mounting pontoon as the offshore platform and depending on the size of the ship body.

Disclosure of Invention

The present application provides a floating platform for an offshore wind turbine to achieve a reduction in weight and construction costs of the floating platform while increasing the expansibility of the floating platform.

In a first aspect, the present application provides a floating platform for an offshore wind turbine comprising: a fan body, a truss platform, and at least one pontoon assembly; the fan main body is fixedly arranged at the center of the top of the truss platform, and the truss platform can be submerged below the sea level; the pontoon assembly is disposed at the bottom of the truss platform for providing buoyancy to the truss platform.

In some possible embodiments, the truss platform can be removably connected to another one or more truss platforms.

In some possible embodiments, the fan body includes: the fan blade assembly and the hollow structural support assembly;

one end of the supporting component is connected with the fan blade component, and the other end of the supporting component is provided with a connecting part which is fixedly connected with the truss platform.

In some possible embodiments, the connecting portion is a hollow structure, one end of the connecting portion is connected with the truss platform, and the other end of the connecting portion is located above sea level.

In some possible embodiments, the pontoon assembly comprises: the buoyancy type hydraulic cylinder comprises N cylinders with buoyancy and a frame structure for fixing the N cylinders, wherein the value of N is an integer greater than or equal to 1; the N cylinders are fixed in the frame structure; the N cylinders have closed hollow cavities and are made of lightweight materials with corrosion resistance.

In some possible embodiments, the frame structure includes M compartments, and at least one of the N cylinders is fixed in one compartment of the M compartments, where M is an integer greater than or equal to 1 and less than or equal to N.

In some possible embodiments, the pontoon assemblies are distributed in a layer Y in the vertical direction at sea level, and Y has a value of an integer greater than or equal to 1 and less than or equal to N; the number of the cylinders of each layer is the same and a plurality of cylinders are connected end to end in the vertical direction of the sea level.

In some possible embodiments, a wall structure is provided between two cylinders connected end to end; the surrounding wall structure is coated on the connecting part of the two cylinders and forms a sealing space with the outer surfaces of the two cylinders.

In some possible embodiments, the pontoon assembly further comprises a ballast structure disposed on the frame structure at an end submerged in the sea level; wherein the ballast structure is used for lowering the gravity center of the pontoon assembly.

In some possible embodiments, the truss deck top includes at least one securing structure disposed in a hollowed out area of the truss deck top.

In some possible embodiments, the floating platform further comprises: and one end of the anchoring structure is connected with one buoy assembly, and the other end of the anchoring structure is connected with the anchoring foundation immersed in the sea.

Compared with the prior art, the technical scheme provided by the application has the beneficial effects that:

in this application, provide buoyancy for truss platform through the flotation pontoon subassembly, regard as the braced platform of offshore wind turbine through truss platform, on the one hand, compare in the traditional offshore operation platform that adopts hull to mount the flotation pontoon, need not to rely on hull own size, can select suitable floating platform size by oneself based on the demand to modular floating platform also expands more easily. On the other hand, truss platforms that are buoyant by the pontoon assemblies have lighter weight and lower manufacturing costs than steel spar structure pontoons.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

FIG. 1 is a schematic view of a floating platform according to the related art;

FIG. 2 is a schematic view of another floating platform according to the related art;

FIG. 3 is a schematic view of a floating platform according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a fan main body in an embodiment of the present application;

FIG. 5 is a schematic structural view of a pontoon assembly according to an embodiment of the application;

FIG. 6 is a schematic structural view of a frame structure according to an embodiment of the present application;

FIG. 7 is a schematic view of another buoy assembly according to an embodiment of the disclosure;

FIG. 8 is a schematic structural view of another buoy assembly according to an embodiment of the present application;

FIG. 9 is a schematic structural view of another buoy assembly according to an embodiment of the present application;

FIG. 10 is a schematic view of another floating platform in accordance with an embodiment of the present application.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present utility model with unnecessary detail.

In order to illustrate the technical solution of the present application, the following description is made by specific examples.

The offshore platform can be fixed or actively floating on the sea surface and can provide an offshore work platform for production work or other activities. The method is widely applied to providing a fixed observation platform for building lighthouses, radar tables, hydrological observation stations and the like, and providing a large-scale operation platform for building offshore wharfs, drilling and production of submarine petroleum and oil gas, fishing, energy power generation and the like.

Most of the existing offshore floating platforms are steel column type structural floating bodies, and fans are fixed at the upper parts of the floating platforms. Or the floating body platform effect is realized by mounting floating bodies on two sides of the ship body. Wherein, the steel floating body is mainly formed by combining a plurality of steel hollow cylinders. Referring to fig. 1, fig. 1 is a schematic structural diagram of a floating platform according to the related art. The floating platform comprises three hollow steel cylinders 11 and connecting posts 12 for fixing the cylinders. The steel cylinder 11 may be internally reinforced to provide buoyancy, stability and resistance to external water pressure, or to withstand other internal and external loads. However, steel construction floats have the disadvantage of being heavy, relatively expensive to construct and also subject to seawater corrosion. In addition, fig. 2 is a schematic structural diagram of another floating platform in the related art. Referring to fig. 2, the floating platform comprises a hull 21, a truss 22 and pontoon assemblies 23, wherein the truss 22 is fixedly arranged on the hull 21 and connected with pontoon assemblies on two sides of the hull 21. However, the ship body mounting pontoon is used as an offshore platform, the size of the ship body is dependent, the whole platform is heavy, and the platform is not easy to expand.

To solve the above problems, embodiments of the present application provide a floating platform for an offshore wind turbine. FIG. 3 is a schematic structural view of a floating platform for an offshore wind turbine according to an embodiment of the present application, and referring to FIG. 3, the floating platform 30 may include: fan body 31, truss deck 32, and pontoon assembly 33; wherein the fan body 31 is fixedly arranged at the top center of the truss platform 32, and the truss platform 32 can be submerged below sea level; a pontoon assembly 33 is disposed at the bottom of truss platform 32 for providing buoyancy to truss platform 32.

It will be appreciated that the fan body 31 is disposed on a truss platform 32, the truss platform 32 being floated to a depth below sea level by buoyancy provided by a pontoon assembly 33. Thus, the number of pontoon assemblies 33, and/or the size of the individual pontoon assemblies 33, may be determined based on the mass of the blower body 31 and truss platform 32 in common. Or the number of pontoon assemblies 33, and/or the size of the individual pontoon assemblies 33 may also be determined based on the design requirements of the blower body 31 at a depth below sea level.

Illustratively, if the size of a single pontoon assembly 33 is large enough, only one pontoon assembly 33 is required to meet the buoyancy requirements of the truss platform 32 on which the blower body 31 is mounted, and the floating platform 30 may include only one pontoon assembly 33. Alternatively, floating platform 30 may also include a plurality of pontoon assemblies 33, where the plurality of pontoon assemblies 33 collectively provide buoyancy to truss platform 32 if the buoyancy provided by a single pontoon assembly 33 fails to meet the buoyancy requirements of truss platform 32 to which fan body 31 is mounted.

It will be appreciated that one or more pontoon assemblies 33 may be symmetrically disposed at the bottom of truss platform 32 in order to maintain stability of truss platform 32.

Illustratively, when floating platform 30 includes only one pontoon assembly 33, pontoon assembly 33 may be centrally disposed on the bottom of truss platform 32. Alternatively, when the floating platform includes a plurality of pontoon assemblies 33, as also shown in fig. 3, the truss platform 32 is formed of a plurality of trusses, and may be arranged in a rectangular shape in 4 rows and 4 columns, and the pontoon assemblies 33 may be disposed around the rectangular truss platform 32 formed of each truss. For example, one pontoon assembly 33 may be provided at each of the four corners of the edge of the truss deck 32, or one pontoon assembly 33 may be provided at each intersection between trusses.

It should be appreciated that buoy assembly 33 may be disposed at any location when disposed at the bottom of truss platform 32, so long as truss platform 32 remains stable, as the embodiments of the present application are not limited in this respect.

It will be appreciated that in order for the wind turbine to function properly at sea, the main body of the wind turbine needs to be stable at the sea surface. The fan main body 31 has a certain weight, so that the fan main body 31 is arranged at the center of the top of the truss platform 32, so that the truss platform 32 can be uniformly stressed in all directions, the situation that the floating platform 30 is inclined due to uneven stress is avoided, and the stability of the floating platform can be improved.

In one possible embodiment, the fan body 31 may include a fan blade assembly and a support assembly. Fig. 4 is a schematic structural diagram of a fan main body in the embodiment of the present application, referring to fig. 4, one end of the supporting component 41 is connected to the fan blade component 42, the other end of the opposite supporting component 41 has a connecting portion 411, and the connecting portion 411 is connected to the truss platform 32.

It will be appreciated that the support assembly 41 is in fact a support bar for the fan body 31 and serves primarily to support the fan blade assembly 42, and that the support assembly 41 may be in the form of a cylinder of any shape. Such as a cylinder or any regular or irregular polygonal cylinder structure.

In one embodiment, support assembly 41 may be a tower-like structure that gradually increases from one end of attachment blade assembly 42 to one end of attachment truss platform 32.

It will be appreciated that, first, the center of gravity of the tower structure is lower than that of a column structure with the two ends being identical, and the center of gravity of the support assembly 41 using the tower structure is more biased toward one end of the truss platform 32 for stability. Second, the larger the end of the support member 41 that is attached to the truss platform 32, the larger the area of contact with the truss platform 32 and the more stable it is when secured to the truss platform 32. Thus, the support assembly 41 has better stability in a tower-like structure.

In another embodiment, the support assembly 41 may also be a hollow-interior cylindrical structure.

It will be appreciated that, first, the use of a hollow structure for the support assembly 41 can reduce the material required to manufacture the support assembly 41, reducing manufacturing costs. Secondly, the fan needs to be assembled with corresponding power generating equipment to work normally, and the electric energy generated by the fan in the running process also needs to be conveyed through a cable line, if the equipment and the cable are arranged outside the supporting component 41, damage can be caused due to factors such as marine stormy waves and the like. The support assembly 41 with the hollow structure has a certain space inside, so that equipment and cables can be directly arranged inside the support assembly 41, and the damage to the equipment and the cables caused by the external environment is avoided. In addition, since the blower needs to perform maintenance at an irregular period during operation, the maintenance passage can be directly built inside the support assembly 41, which is safer than building the maintenance passage outside the support assembly 41.

In one possible embodiment, the connection portion 411 is in a hollow structure. One end of the connection 411 is connected to the truss deck 32, and the other end is located above sea level.

The connecting portion 41 of the hollow structure is an integrally non-closed structure, and seawater can directly pass through the connecting portion 411 when flowing through the connecting portion 411, so that the seawater is not completely blocked. For example, the connection 411 may be a plurality of evenly distributed support columns; or the connecting part 411 may be a frame structure formed by a plurality of support columns; alternatively, the connection part 411 may be a cylindrical structure having a plurality of through holes, and seawater may pass through the connection part 411 from one side through holes and flow out from the other side through holes when flowing through the connection part.

It can be appreciated that, if the connection portion 411 adopts a closed tubular structure due to the surge existing at the sea level, the force of the surge applied to the fan main body 31 is large, so that the fan main body 31 is easily unstable. Therefore, the connecting part 411 with the hollow structure is adopted, the surge on the sea surface can directly pass through the connecting part 411 with the hollow structure, meanwhile, the supporting component 41 is hollow, and the surge on the sea surface can directly pass through the hollow space of the supporting component 41 and pass through the connecting part 411, so that the surge unloading force is realized, and the unstable condition of the fan main body 31 caused by the sea surface surge is reduced.

In one embodiment, the connection 411 and truss platform 32 may be a multi-point connection.

Illustratively, when the connection 411 is a plurality of evenly distributed support columns, the connection 411 and the truss platform are respectively connected and fixed together by each connection column. Alternatively, the truss platform 32 is a rectangular truss platform with 4 rows and 4 columns formed by a plurality of trusses as shown in fig. 3, the connecting portion 411 is a cylindrical structure with through holes, and 4 tangential contact points exist between the connecting portion 411 and the truss platform 32. At this time, the connection 411 and the truss platform 32 may be fixed together by 4 tangential contact points.

In another embodiment, the connection 411 may have a shape that matches the truss deck 32.

Illustratively, a truss platform 32 comprised of a plurality of trusses, with various shapes of voids between the trusses, such as triangular, circular, rectangular, etc. The connection 411 may have a shape corresponding to the void on the truss deck 32, and the connection 411 may be completely fitted to the void of the corresponding shape. In this case, the connection portion 411 and the truss platform may be completely fixed together, which corresponds to an integrated structure.

It will be appreciated that one end of the connection 411 is fixedly connected directly to the truss deck 32, while the truss deck 32 is submerged in the sea, and the other end of the connection 411 is above sea level.

In one possible embodiment, truss platforms 32 can be removably coupled to one or more truss platforms 32.

Illustratively, each truss platform 32 that may be interconnected may be the same shape truss platform, or may be a different shape truss platform. The truss platforms 32 are connected, and when expansion of the floating platform is required, the truss platforms 32 can be directly connected together through the connection interfaces by arranging the connection interfaces on each truss platform 32. Alternatively, when truss platforms to be connected are required, a plurality of truss platforms may be connected by a single connection structure.

In one embodiment, one truss platform 32 provided with fan bodies 31 may be connected to one or more truss platforms 32 not provided with fan bodies 31.

It will be appreciated that truss deck 32 acts as a support platform for fan body 31, the size of which depends on the weight of fan body 31 itself. Only expanding the truss platform 32 can effectively increase the weight that the expanded truss platform 32 can bear. Further, as a support platform for the blower body 31, the stability of the truss platform 32 of a larger size is also better.

In another embodiment, one truss platform 32 provided with blower body 31 may be connected to one or more truss platforms 32 provided with blower body 31.

It can be appreciated that the truss platforms 32 connected with the blower main body 31 are connected together to form a large platform group, and the truss platforms 32 can interact with each other, so that the influence of factors such as wind waves on the sea surface is smaller. The floating platform group can resist sea conditions with higher strength, and the stability of the floating platform is improved.

In one embodiment, the pontoon assemblies 33 that provide buoyancy to the truss platform 32 may be a unitary structure that is secured together during fabrication, or the truss platform 32 and pontoon assemblies 33 may be removably connected.

It will be appreciated that by means of the detachable connection, when the pontoon assembly 33 is damaged or when it is desired to increase or decrease the pontoon assembly 33, only the pontoon assembly 33 may be replaced, and the entire floating platform may not be replaced, so that the blower main body 31 may continue to operate, thereby improving the reliability of the entire floating platform.

Fig. 5 is a schematic structural view of a pontoon assembly according to an embodiment of the application, and referring to fig. 5, pontoon assembly 33 may include N columns 51 having buoyancy and a frame structure 52 for fixing N columns 51. Wherein, the value of N is an integer greater than or equal to 1, and N cylinders 51 are fixed in the frame structure 52. Wherein the N cylinders 51 have a closed hollow cavity and are made of a lightweight material having corrosion resistance.

It will be appreciated that the barrel 51 having a hollow cavity has a lower overall weight than a solid barrel at the same volume. Thus, based on the buoyancy principle, a lighter mass, larger volume cylinder 51 can have greater buoyancy. At the same time, the closed space also ensures that the hollow cavity is not filled with seawater, and also ensures the usability of the pontoon assembly 33.

In addition, since the pontoon assembly 33 needs to be wholly or partially submerged in seawater, which is highly corrosive, the barrel 51 may be made of a material having corrosion resistance in order to ensure a longer life span of the pontoon assembly 33. For example, it may be made of polytetrafluoroethylene (poly tetra fluoroethylene, PTFE), rubber, or the like.

In one embodiment, the shape of the barrel 51 may be any shape that can be placed in the frame structure 52. Such as ellipsoidal, cylindrical, spherical, etc. The shape of the N cylinders 51 may be the same or may be different, as long as the pontoon assembly 33 has stability as a whole when the plurality of cylinders 51 are placed in the frame structure 52, which is not limited in the embodiment of the application.

Illustratively, the N pontoons 51 may be two ellipsoidal cylinders and two cylindrical cylinders, and each two cylinders 51 may be disposed in the same structure as the cylinders 51 in the diagonal direction.

In one embodiment, the frame structure 52 is made of a rigid material, the surface of which is coated with a corrosion resistant coating.

It will be appreciated that the N cylinders 51 are secured together by the frame structure 52 and that the frame structure 52 must be made of a rigid material in order to ensure that the N cylinders 51 do not spread out within the frame structure 52. While the frame structure 52 itself also requires the use of lighter materials in order to ensure an overall lighter weight of the pontoon assembly 33. For example, the frame structure 52 may be a hollow stainless steel tube, or may be made of any other rigid lightweight metal or non-metal material, which is not limited in this embodiment.

In addition, since the frame structure 52 is required to be wholly or partially submerged under the sea surface as in the case of the cylinder 51, the corrosion of the frame structure 52 by seawater can be reduced by coating the surface of the frame structure 52 with a corrosion-resistant coating, and the frame structure 52 is protected to some extent. Also, since the frame structure 52 is directly exposed to seawater, the corrosion resistant coating selected is at least required to be water resistant.

In one possible embodiment, N cylinders 51 are fixedly disposed within M compartments, respectively, within a frame structure 52. Fig. 6 is a schematic structural view of a frame structure 52 according to an embodiment of the present application, and is shown in fig. 6: the frame structure 52 includes M compartments 53, and at least one cylinder 51 of the N cylinders 51 is fixed in one compartment 53 of the M compartments 53. Wherein, the value of M is an integer which is more than or equal to 1 and less than or equal to N.

It will be appreciated that the N cylinders 51 that are separately disposed can be fixed in the frame structure 52, and when one or more cylinders 51 need to be replaced, only the cylinder 51 in the corresponding compartment 53 needs to be replaced, and the cylinders 51 in other compartments 53 will not be affected. And even if the cylinder in one or more compartments 53 is damaged, the whole pontoon assembly 20 is stable due to the fixing of the frame assembly 52, and the damage of part of the cylinder 51 does not affect other cylinders. Therefore, by arranging a plurality of compartments 53 to separate the N cylinders 51, not only is the stability of the pontoon assembly 20 overall higher, but also replacement of a portion of the cylinders 51 thereof is facilitated.

In one embodiment, the number of barrels 51 secured within each compartment 53 is the same.

It will be appreciated that the number of compartments 53 may be the same as the number of cylinders 51, in which case each cylinder 51 may be provided separately within one compartment 53. Alternatively, the number of cylinders 51 may be an integer multiple of the number of compartments 53.

For example, the number of cylinders 51 may be 2 times the number of compartments 53, and in this case, 2 cylinders 51 may be fixed in each compartment 53. When the number of the cylinders 51 is 3 times that of the compartments 53, 3 cylinders 51 may be fixed in each compartment 53.

In other possible embodiments, the number of barrels 51 secured within each compartment 53 is different.

It will be appreciated that in order to ensure the stability of the buoy assembly 20 as a whole, symmetry needs to be maintained between each compartment 53 when the number of barrels 51 secured within each compartment 53 is different. Therefore, the center of the pontoon assembly is positioned at the center of the pontoon assembly, so that the pontoon assembly cannot deflect when being placed on the water surface.

Illustratively, N has a value of 5, which now includes 5 cylinders 51. The number of the compartments 53 is 3, A, B, C, and A, B, C three compartments 53 are arranged in a line. The space size of the A, C compartments is the same, two cylinders 51 can be fixed, and one cylinder can be fixed by the compartment B. 5 identical cylinders 51 are secured within each of the three compartments A, B, C.

In one possible embodiment, the cylinders 51 fixed in one compartment 53 are uniformly distributed in the compartment 53, and each cylinder 51 is respectively attached to the compartment 53 at the top and bottom of the cylinder 51 in the vertical direction of the sea level.

It should be understood that when a plurality of cylinders 51 are included in one compartment 53, in order to ensure that the compartment 53 is uniformly stressed, it is necessary to uniformly distribute the cylinders 51. For example, one compartment 53 may contain 3 cylinders 51, each of which is of the same ellipsoidal shape. The three cylinders 51 may be arranged in a row in the compartment 53, or may be attached to each other and arranged in an equilateral triangle. Or one compartment 53 may contain 4 cylinders 51, and the 4 cylinders 51 may be disposed in a manner of being open in adjacent rows, or may be disposed in a manner of being bonded to each other in two rows and two columns. The particular manner in which the barrels 51 are placed may be determined based on offshore platform design requirements or the size of the compartments 53, as embodiments of the present application are not specifically limited.

In one possible embodiment, the pontoon assemblies 33 are distributed in the vertical direction at sea level with Y being an integer greater than or equal to 1 and less than or equal to N;

wherein the number of cylinders 51 of each layer is the same and a plurality of cylinders 51 are connected end to end in the vertical direction of the sea level.

It can be appreciated that by designing the pontoon assembly 33 as a multi-layer structure, each layer is provided with the same number of barrels 51, and under the condition that the number of barrels 51 is kept unchanged, the occupied area of the pontoon assembly 33 in the vertical direction of the plane can be effectively reduced, and the dimension requirements of different offshore platforms can be better adapted.

Illustratively, referring to FIG. 7, (a) in FIG. 7 is a front view of the pontoon assembly 33 of an embodiment of the application, and (b) is a top view of the pontoon assembly 33 of an embodiment of the application. The pontoon assembly 33 is of a double-layer distribution design in the vertical direction of the sea level, each layer comprises four cylinders 51, and every two cylinders 51 are connected end to end in the vertical direction of the sea level and are placed in the same compartment 53.

In one possible embodiment, a wall structure 81 is also included between the two cylinders 51 connected end to end.

Referring to fig. 8, the surrounding wall structure 81 is wrapped around the connection portion of the two cylinders 51, and encloses a sealed space with the outer surfaces of the two cylinders 51.

For example, when the cylinder 51 is in the shape of an ellipsoid or a sphere, the plurality of cylinders 51 cannot be completely bonded together. When the pontoon assembly 33 is designed for a multi-layer structure, there is a gap at the interface between each two barrels 51. While seawater has certain fluidity, and the buoyancy of the barrel 51 is changed due to a certain change in the height of the pontoon 51 from the water surface line. And the two pontoons 51 in the vertical direction at sea level are subjected to uneven buoyancy due to the existence of the void, so that it is necessary to connect the two pontoons 51 as one body by providing the surrounding wall structure 81.

Illustratively, the enclosure wall structure 81 may be a flexible steel sheet, or other water resistant material having toughness. The wall structure 81 may be fixed to the connection between the pontoons 51 by means of adhesive or the wall structure 81 may be fixed to the pontoon 51 by means of a tightening structure. The manner in which the enclosure wall structure 81 is connected to the barrel 51 is not limiting as to the scope of protection sought herein.

In one possible embodiment, ballast structures 91 may be added to the pontoon assembly 33 to lower the center of gravity of the pontoon assembly 33 in order to balance the buoyancy of the pontoon assembly 33 and the weight of the pontoon assembly 33 itself, or to design the depth at which the pontoon assembly 33 acts below sea level based on design requirements, as shown in FIG. 9.

Illustratively, the ballast structure 91 is disposed on the end of the frame structure 52 that is submerged into the sea level.

It will be appreciated that because different masses of the fan body 31 are required to be secured at different depths at sea, the pontoon assemblies 33 are enabled to meet the different weights of the fan body 31 by adding different weights and sizes of ballast structures 91 to enable the pontoon assemblies 33 to float in the seawater at the respective depths.

Illustratively, the ballast structure 91 may be cast from concrete. The ballast structure 91 is manufactured by concrete pouring, so that the manufacturing cost is low, the pouring shape can be matched with the shape of the cylinder 51, the ballast structure 91 and the cylinder 51 can be in bending fit, and the ballast structure 91 and the cylinder 51 are integrated, and no gap exists in the middle. There is no inconsistency in buoyancy received due to the change in the water surface line, and stability of the pontoon assembly 33 is improved.

In addition, the ballast structure 91 may be an integral structure that is fixedly connected to the frame structure 52 during manufacture, or may be a separate peripheral module, where the ballast structure 91 and the pontoon assembly 33 are directly detachably fixed, and the center of gravity of the pontoon assembly 33 may be changed by replacing the ballast structure 91 with a different weight.

It will be appreciated that the N cylinders in the pontoon assembly 33 have closed hollow cavities and are made of lightweight material that is corrosion resistant. In this manner, the buoyant cylinder 51 is secured by the frame structure 52, which can significantly reduce the weight of the pontoon assembly 33. Materials and construction costs are also reduced relative to steel structural pontoons. And the cylinder 51 made of a lightweight material having corrosion resistance also increases corrosion resistance.

In one possible embodiment, at least one securing structure 101 may be added to the top of truss platform 32, as shown in fig. 10, in order to increase the stability of truss platform 32 itself.

For example, the fixing structure 101 may be disposed in a partially hollowed-out region at the top of the truss platform 32.

The fixing structure 101 may be a deck laid on the truss platform 32, or may be a fixing rib, or may be any other material capable of fixing the truss platform 32.

It can be appreciated that the fixing structure 101 is only arranged in a part of the hollow area of the truss platform 32, and compared with the fixing structure 101 arranged in all the hollow areas at the top of the truss platform 32, the fixing structure 101 has smaller combined area, so that the effect of the water surface surge is smaller, and the effect of improving the stability of the truss platform 32 is also achieved.

In one possible embodiment, floating platform 30 may further comprise: at least one anchoring structure. The anchor structure may be connected at one end to one buoy assembly 50 and at the other end to an anchor foundation submerged in the sea.

The anchoring structure may be a mooring line, or may be a chain, for example. The anchoring foundation can be various types such as a suction cylinder, a gravity type pile anchor and the like.

It will be appreciated that the use of the anchoring structure enables the floating platform 30 to be anchored in a fixed sea area, avoiding floating of the floating platform 30 and improving the resistance of the floating platform 30 to wind and waves.

Above-mentioned floating platform for offshore wind turbine provides buoyancy for truss platform 32 through buoy subassembly 33, through truss platform 32 as the supporting platform of fan main part 31, on the one hand, compare in the traditional offshore work platform that adopts the hull to mount the flotation pontoon, need not to rely on hull self-size, can select suitable floating platform size by oneself based on the demand to modular floating platform also expands more easily. On the other hand, truss platforms 32 that are buoyant by pontoon assemblies 33 have lighter weight and lower manufacturing costs than steel columns of pontoons.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (9)

1. A floating platform for an offshore wind turbine, comprising: a fan body, a truss platform, and at least one pontoon assembly;

the fan main body is fixedly arranged at the center of the top of the truss platform, and the truss platform can be submerged below the sea level;

the pontoon assembly is arranged at the bottom of the truss platform and is used for providing buoyancy for the truss platform;

the truss platform top comprises at least one fixing structure, and the fixing structure is arranged in a hollowed-out area of the truss platform top.

2. The floating platform of claim 1, wherein,

the truss platform can be removably coupled to one or more truss platforms.

3. The floating platform of claim 2, wherein,

the fan main body includes: the fan blade assembly and the hollow structural support assembly;

one end of the supporting component is connected with the fan blade component, the other end of the supporting component is provided with a connecting part, and the connecting part is fixedly connected with the truss platform.

4. A floating platform as claimed in claim 3, wherein,

the connecting portion is hollow out construction, connecting portion one end with truss platform is connected, and the other end is located sea level above.

5. The floating platform of claim 2, wherein,

the pontoon assembly comprises: the buoyancy type hydraulic cylinder comprises N cylinders with buoyancy and a frame structure for fixing the N cylinders, wherein the value of N is an integer greater than or equal to 1; the N cylinders are fixed in the frame structure;

the N cylinders have closed hollow cavities and are made of lightweight materials with corrosion resistance.

6. The floating platform of claim 5, wherein,

the frame structure comprises M compartments, at least one of the N cylinders is fixed in one compartment of the M compartments, and the value of M is an integer which is more than or equal to 1 and less than or equal to N.

7. The floating platform of claim 6, wherein,

the pontoon assemblies are distributed in a Y layer in the vertical direction of the sea level, and the value of Y is an integer which is more than or equal to 1 and less than or equal to N;

the number of the cylinders at each layer is the same and a plurality of cylinders are connected end to end in the vertical direction of the sea level.

8. The floating platform of claim 7, wherein,

a surrounding wall structure is arranged between the two cylinders which are connected end to end; the surrounding wall structure is coated on the connecting part of the two cylinders and forms a sealing space with the outer surfaces of the two cylinders.

9. The floating platform of claim 1, wherein,

the floating platform further comprises: and one end of the anchoring structure is connected with one pontoon assembly, and the other end of the anchoring structure is connected with the anchoring foundation immersed in the sea.

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