Floating body structure, offshore power generation fan and manufacturing and mounting method of offshore power generation fan

Abstract

The invention discloses a floating body structure, an offshore power generation fan and a manufacturing and mounting method of the offshore power generation fan. The manufacturing and mounting method of the offshore power generation fan comprises the steps that a plurality of steel pipes penetrate through a plurality of mounting through holes of a second fixing piece one to one, and a flange plate and the second fixing piece are connected through bolts; the bottoms of a plurality of steel pipes are inserted into a plurality of mounting holes of a third fixing piece one to one, and the flange plate and the third fixing piece are connected through bolts; and the tops of the steel pipes are inserted into the mounting holes of the first fixing piece in a one-to-one mode, and the flange plate and the first fixing piece are connected through bolts, so that a floating body combination is manufactured. On the premise of ensuring the strength of the floating body, the floating body structure is effectively simplified, the mounting and manufacturing difficulty is reduced, and the manufacturing cost is reduced. In addition, the height of the fan can be effectively increased, floating body structure connecting pieces are prevented from being all located below the sea level, the distance between fan blades and the sea level can be prevented from being too close, and the corrosion prevention cost of the fan is greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of floating offshore wind turbine, in particular to a floating structure, an offshore wind turbine and a manufacturing and installation method thereof. BACKGROUND

[0002] The floating offshore wind power is a kind of wind power generation technology, which is a new type of power generation device that converts wind energy into electric energy through the rotation of wind turbine blades. The wind turbine is provided with buoyancy by the floating body and is fixed to the seabed by anchor chains. It has good stability, is easy to transport and move, and can be used in deep-sea conditions.

[0003] However, the existing floating offshore wind turbine floating body includes a square column, a circular column and a bottom floating box. The three square columns are hollow structures with reinforcing members inside and are arranged at equal intervals in the form of an equilateral triangle. The circular column is installed at the center of the equilateral triangle formed by the three square columns, and the top flange of the circular column is connected to the tower bottom flange of the tower of the floating wind turbine. The bottom floating box is Y-shaped, and the three distal ends of the bottom floating box are connected to the lower parts of the three square columns, respectively. The bottom end of the circular column is installed at the center of the bottom floating box. This floating body structure has a large volume, a complex structure, many steel structural members, and is difficult to install and manufacture, with high cost. SUMMARY

[0004] The main purpose of the present application is to provide a floating structure, an offshore wind turbine and a manufacturing and installation method thereof, which effectively simplifies the floating structure, reduces the installation and manufacturing difficulty and reduces the manufacturing cost while ensuring the strength of the floating structure.

[0005] To achieve the above-mentioned purpose, the present application provides a manufacturing and installation method of an offshore wind turbine, which comprises the following steps: S10, a plurality of steel pipes are inserted one by one through a plurality of installation through holes of a second fixing member, the holes of the flange plates at the positions of the steel pipes are aligned with the flange holes on the second fixing member, and the flange plates and the second fixing member are connected by bolts; S20, the bottom of a plurality of steel pipes is inserted one by one into a plurality of installation holes of a third fixing member, the holes of the flange plates at the positions of the steel pipes are aligned with the flange holes on the third fixing member, and the flange plates and the third fixing member are connected by bolts; S30, the top of a plurality of steel pipes is inserted one by one into a plurality of installation holes of a first fixing member, the holes of the flange plates at the positions of the steel pipes are aligned with the flange holes on the first fixing member, and the flange plates and the first fixing member are connected by bolts to manufacture a group of floating body combinations; S40, the remaining floating body combinations are manufactured according to steps S10-S30; S50, one-to-one mounting of multiple support legs of the wind turbine on multiple floating body combinations.

[0006] Optionally, the step S50 of one-to-one mounting of multiple support legs of the wind turbine on multiple floating body combinations specifically comprises: S51, mounting of several steel plates with bolt holes on the support legs of the wind turbine, and mounting of several connecting steel plates with bolt holes on the top of the first fixing member; S52, one-to-one stacking of the several steel plates and the several connecting steel plates, and aligning of the bolt holes of the steel plates and the bolt holes of the corresponding connecting steel plates; S53, fixing of the steel plates and the connecting steel plates by bolts to mount one floating body combination and the support leg; S54, mounting of the remaining floating body combinations and the remaining support legs according to steps S51-S53; S55, mounting of the wind turbine tower on the intersection position of the multiple support legs, and building of a welded support steel member in the support leg to complete the manufacturing and installation of the offshore power generation wind turbine.

[0007] Optionally, before the step S10 of one-to-one passing of the several steel pipes through the multiple mounting through holes of the second fixing member, aligning of the hole of the flange plate at the position of the steel pipe and the flange hole on the second fixing member, and connecting of the flange plate and the second fixing member by bolts, it further comprises: S09, welding of flange plates on both ends and the middle part of the steel pipe.

[0008] To achieve the above-mentioned purpose, the present application provides a floating body structure, which comprises at least three floating body combinations, the top of the floating body combination is suitable for connecting with the support leg of the wind turbine, the floating body combination comprises a first fixing member, a second fixing member, a third fixing member and several steel pipes; the steel pipe is a closed hollow structure, the steel pipe passes through the second fixing member and is connected therewith, both ends of the steel pipe are connected with the first fixing member and the third fixing member respectively; the projection of the several steel pipes in the height direction of the floating body combination is arranged in an array.

[0009] Optionally, the both ends and the middle part of the steel pipe are provided with flange plates, the steel pipe and the first fixing member, the steel pipe and the second fixing member, and the steel pipe and the third fixing member are connected through the flange plates at the corresponding positions; wherein the diameter or width of the flange plate at both ends of the steel pipe is smaller than the diameter or width of the flange plate at the middle part of the steel pipe.

[0010] Optionally, the second fixing member is petal-shaped, the second fixing member is provided with a plurality of mounting through holes for one-to-one passing of the steel pipes and a plurality of first flange holes arranged around the mounting through holes, the plurality of mounting through holes are arranged in an array, and the plurality of first flange holes are threadedly connected with bolts connecting the flange plates.

[0011] Optionally, the first fixing member is provided with a plurality of mounting holes for one-to-one mounting of the end portions of the steel pipes on an end face of the end connected with the steel pipes and a plurality of second flange holes arranged around the mounting holes, the plurality of mounting holes are arranged in an array, and the plurality of second flange holes are threadedly connected with bolts connecting the flange plates; the third fixing member is the same as the first fixing member in structure and both are petal-shaped, and the two fixing members are oppositely arranged on a side with the mounting holes.

[0012] Optionally, the first fixing member is provided with a plurality of connecting steel plates for connecting with the steel plates of the support legs of the fan, the plurality of connecting steel plates are uniformly distributed on the first fixing member and all extend in the vertical direction.

[0013] Optionally, the outer surface of the floating body combination is coated with a corrosion-resistant coating.

[0014] To achieve the above-mentioned purpose, the application further provides an offshore power generation fan, which comprises a fan and the floating body structure as described above, the fan is provided with a plurality of support legs, the plurality of support legs are one-to-one mounted on the plurality of floating body combinations of the floating body structure; the floating body structure comprises at least three floating body combinations, the top of the floating body combination is adapted to be connected with the support legs of the fan, the floating body combination comprises a first fixing member, a second fixing member, a third fixing member and a plurality of steel pipes; the steel pipes are all closed hollow structures, the steel pipes all pass through the second fixing member and are connected therewith, the two ends of the steel pipes are connected with the first fixing member and the third fixing member respectively; the projection of the plurality of steel pipes in the height direction of the floating body combination is arranged in an array. The fan comprises a fan tower, a nacelle, a generator set and blades, the nacelle is fixed to the top of the fan tower, the generator set is installed in the nacelle, and the blades are located outside the nacelle and are connected with the generator set.

[0015] In the technical scheme of the present application, the offshore power fan manufacturing and installation method comprises the following steps: S10, a plurality of steel pipes are inserted one by one into a plurality of installation through holes of the second fixing member, the holes of the flange plates of the steel pipes are aligned with the flange holes of the second fixing member, and the flange plates are connected to the second fixing member by bolts; S20, the bottom of a plurality of steel pipes is inserted one by one into a plurality of installation holes of the third fixing member, the holes of the flange plates of the steel pipes are aligned with the flange holes of the third fixing member, and the flange plates are connected to the third fixing member by bolts; S30, the top of a plurality of steel pipes is inserted one by one into a plurality of installation holes of the first fixing member, the holes of the flange plates of the steel pipes are aligned with the flange holes of the first fixing member, and the flange plates are connected to the first fixing member by bolts to manufacture a group of floating body combinations; S40, the remaining floating body combinations are manufactured according to steps S10-S30; S50, a plurality of supporting legs of the fan are installed one by one on a plurality of floating body combinations. It can be understood that the floating body structure of the present application comprises three or more floating body combinations, each floating body combination comprises a first fixing member, a second fixing member, a third fixing member and a plurality of steel pipes, the floating body structure is relatively simple, the floating body combination is connected one by one with the supporting leg, the overall volume of the floating body structure is greatly reduced, the floating body structure is effectively simplified under the premise of ensuring the strength of the floating body, the processing difficulty is reduced, the installation and manufacturing are more convenient, and the manufacturing cost is reduced. The manufacturing and installation method can effectively reduce the installation and manufacturing difficulty and greatly reduce the cost.

[0016] In addition, appropriate floating body combination height can be selected according to different offshore wind turbine height capacity requirements, the height of the fan can be effectively improved, all the connecting members of the floating body structure can be avoided to be below the sea level, the distance between the fan blade and the sea surface can also be avoided to be too close, and the fan corrosion prevention cost is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 The flowchart of an embodiment of the offshore power fan manufacturing and installation method of the present application; Figure 2 The structural schematic diagram of an embodiment of the offshore power fan of the present application; Figure 3 The structural schematic diagram of an embodiment of the floating body combination of the offshore power fan of the present application; Figure 4 Figure 1 is a structural schematic diagram of a first fixing member in an embodiment of a floating body combination of a marine power generation fan of the present application; Figure 5 Figure 2 is a structural schematic diagram of a second fixing member in an embodiment of a floating body combination of a marine power generation fan of the present application; Figure 6 Figure 3 is a structural schematic diagram of a third fixing member in an embodiment of a floating body combination of a marine power generation fan of the present application.

[0019] Brief Description of the Drawings 100, floating body combination; 10, first fixing member; 20, second fixing member; 30, third fixing member; 40, steel pipe; 20a, mounting through hole; 20b, first flange hole; 10a, mounting hole; 10b, second flange hole; 210, fan tower; 211, support leg; 220, engine room; 230, blade.

[0020] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the scope of protection of the present application.

[0022] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0023] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms “mounting”, “connection” and “connection” should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In addition, the description related to "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. The meaning of "and / or" appearing throughout the text is to include three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B schemes. The technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the present application.

[0025] The present application provides a floating body structure and a sea power generation fan with the same.

[0026] Reference Figures 1 to 6 In an embodiment of the present application, the sea power generation fan comprises a fan and a floating body structure, the fan is provided with a plurality of support legs 211, and the plurality of support legs 211 are one-to-one mounted on a plurality of floating body combinations 100 of the floating body structure; the fan comprises a fan tower 210, a cabin 220, a generator set and blades 230, the cabin 220 is fixed at the top of the fan tower 210, the generator set is installed in the cabin 220, and the blades 230 are located outside the cabin 220 and connected with the generator set.

[0027] Reference Figures 2 to 6 In the present embodiment, the floating body structure comprises at least three floating body combinations 100, the top of the floating body combination 100 is adapted to be connected with the support leg 211 of the fan, and the floating body combination 100 comprises a first fixing member 10, a second fixing member 20, a third fixing member 30 and a plurality of steel pipes 40; the steel pipe 40 is a closed hollow structure, the steel pipe 40 passes through the second fixing member 20 and is connected with the same, and the two ends of the steel pipe 40 are connected with the first fixing member 10 and the third fixing member 30 respectively; the projections of the plurality of steel pipes 40 in the height direction of the floating body combination 100 are arranged in an array.

[0028] In the present embodiment, the steel pipe 40 can be preferably a hollow closed circular steel pipe 40, or other shapes of steel pipes 40 can also be used, which is not limited here. The surface of the steel pipe 40 can be subjected to corrosion prevention treatment to enhance the ability of resisting seawater corrosion.

[0029] More preferably, as shown in Figure 2 The floating body structure has four floating body combinations 100, the number of the steel pipes 40 of each floating body combination 100 can be seven, the seven steel pipes 40 are connected by the first fixing member 10, the second fixing member 20 and the third fixing member 30 to form a floating body combination 100, and the four floating body combinations 100 constitute the floating body foundation structure of the sea wind turbine generator.

[0030] It can be understood that the floating body structure of the present application includes three or more floating body combinations 100, the floating body combination 100 only includes the first fixing member 10, the second fixing member 20, the third fixing member 30 and the plurality of steel pipes 40, the floating body structure is relatively simple, the floating body combination 100 is connected with the support leg 211 in one-to-one, the overall volume of the floating body structure is greatly reduced, the floating body structure is effectively simplified under the premise of ensuring the strength of the floating body, the processing difficulty is reduced, and the manufacturing cost is reduced.

[0031] In addition, the height of the floating body combination 100 can be selected according to different offshore wind turbine height capacity requirements, the height of the wind turbine can be effectively improved, all the connecting members of the floating body structure can be avoided to be below the sea level, the distance between the wind turbine blade 230 and the sea surface can also be avoided to be too close, and the anti-corrosion cost of the wind turbine is greatly reduced.

[0032] The floating body structure of the present application solves the problem that the large height of the wind turbine causes the cross section of the floating body structure and the engineering quantity to increase. The floating body structure of the present application is convenient to transport, the construction is simpler than the conventional floating body foundation structure, the construction efficiency and quality are effectively improved, and only the bolt connection of the plurality of steel pipes 40 and the fixing members on the site is needed.

[0033] In order to further improve the convenience of installation of the floating body structure, with reference to Figures 2 to 6 In an embodiment, the two ends and the middle part of the steel pipe 40 can be provided with flange plates, the steel pipe 40 and the first fixing member 10, the steel pipe 40 and the second fixing member 20, and the steel pipe 40 and the third fixing member 30 are connected through the flange plates at corresponding positions respectively; wherein the diameter or width of the flange plates located at the two ends of the steel pipe 40 is smaller than the diameter or width of the flange plates located at the middle part of the steel pipe 40. In this way, the second fixing member 20 can pass through the flange plates at the top and bottom of the steel pipe 40, the fixed connection of the second fixing member 20 and the middle part of the steel pipe 40 is ensured, and the connection of the two ends of the steel pipe 40 and the first fixing member 10 and the third fixing member 30 is also facilitated.

[0034] In order to ensure that the floating body structure has high supporting strength and good stability, and further make the volume of the floating body structure as small as possible, and further reduce the cost, with reference to Figures 2 to 6 In an embodiment, the second fixing member 20 can be hollow petal-shaped, the second fixing member 20 is provided with a plurality of installation through holes 20a for one-to-one passing of the plurality of steel pipes 40 and a plurality of first flange holes 20b arranged around the installation through holes 20a, the plurality of installation through holes 20a are arranged in an array, and the plurality of first flange holes 20b are threadedly connected and adapted with the bolts of the connecting flange plates.

[0035] In the embodiment, a plurality of mounting holes 10a for one-to-one mounting of the end portions of the steel pipes 40 and a plurality of second flange holes 10b arranged around the mounting holes 10a are formed on the end face of the one end of the first fixing member 10 connected with the steel pipes 40, the plurality of mounting holes 10a are arranged in an array, and the plurality of second flange holes 10b are threadedly connected with the bolts of the flange plate.

[0036] In the embodiment, as shown in Figure 5 , the second fixing member 20 is connected with the middle portions of the seven steel pipes 40, the second fixing member 20 is in the shape of a flower with six petals, and the shape is consistent with the splicing shape of the outer edges of the seven steel pipes 40. The second fixing member 20 can be divided into two parts. The periphery of the second fixing member 20 is bent into the shape of a flower, and the steel plate in the shape of a flower is placed vertically. A middle steel plate in the shape of a flower is welded at the middle position of the vertically placed steel plate in the shape of a flower. Seven mounting through holes 20a are reserved in the middle steel plate, the diameters of the mounting through holes 20a are consistent with the outer diameters of the steel pipes 40, and the positions of the mounting through holes 20a are consistent with the positions where the steel pipes 40 need to be mounted, so that the second fixing member 20 can be passed through by the seven steel pipes 40, and the middle portions of the steel pipes 40 are limited. First flange holes 20b are arranged around the outer periphery of the reserved mounting through holes 20a and correspond to the hole positions of the middle flange plates of the steel pipes 40, so that the second fixing member 20 is connected with the steel pipes 40 through bolts.

[0037] In the embodiment, as shown in Figure 4 and Figure 6 , the first fixing member 10 and the third fixing member 30 have the same structure, except that the orientations are different during mounting. Specifically, the first fixing member 10 and the third fixing member 30 are in the shape of a flower with six petals, and the shape is consistent with the splicing shape of the outer edges of the seven steel pipes 40. The first fixing member 10 and the third fixing member 30 are each divided into two parts, the periphery of each part is bent into the shape of a flower, and the steel plate in the shape of a flower is placed vertically. A steel cover plate in the shape of a flower is arranged at the top and the bottom of the vertically placed steel plate in the shape of a flower. Seven mounting holes 10a are reserved in the opposite steel cover plates of the first fixing member 10 and the third fixing member 30, the diameters of the mounting holes 10a are consistent with the outer diameters of the steel pipes 40, and the positions of the mounting holes 10a are consistent with the positions where the steel pipes 40 need to be spliced, so that the first fixing member 10 and the third fixing member 30 can be passed through by the seven steel pipes 40, and the top and bottom portions of the steel pipes 40 are limited. Second flange holes 10b are arranged around the outer periphery of the reserved mounting holes 10a of the steel cover plates and are consistent with the hole positions on the end flange plates of the steel pipes 40, so that the first fixing member 10 and the third fixing member 30 are fixedly connected with the top and bottom portions of the steel pipes 40 through bolts.

[0038] In order to conveniently connect the support legs 211 of the wind turbine tower 210 with the floating body assembly 100, in an embodiment, the top of the first fixing member 10 is provided with a plurality of connecting steel plates, which are used to connect with the steel plates of the support legs 211 of the wind turbine, and the plurality of connecting steel plates are uniformly distributed on the first fixing member 10 and extend vertically.

[0039] The first fixing member 10 is used as the fixing member at the top of the floating body structure, and the top of the first fixing member 10 is welded with nine vertically extending rectangular connecting steel plates which are uniformly distributed, and the number of the connecting steel plates is set according to different capacities of the wind turbine, and bolt holes are uniformly arranged on the connecting steel plates, so as to conveniently bolt connect with the support legs 211 of the wind turbine.

[0040] In an embodiment, the outer surface of the floating body assembly 100 is coated with a corrosion-resistant coating, so that the seawater corrosion resistance of the floating body structure can be effectively improved, and the maintenance cost can be reduced.

[0041] The application further provides a manufacturing and installing method of the offshore power generation wind turbine.

[0042] Reference Figures 1 to 6 In an embodiment of the application, the manufacturing and installing method of the offshore power generation wind turbine comprises the following steps: S10, a plurality of steel pipes 40 are one by one inserted into the plurality of installation through holes 20a of the second fixing member 20, the holes of the flange plates of the steel pipes 40 are aligned with the flange holes of the second fixing member 20, and the flange plates are bolted with the second fixing member 20; S20, the bottom of the plurality of steel pipes 40 is one by one inserted into the plurality of installation holes 10a of the third fixing member 30, the holes of the flange plates of the steel pipes 40 are aligned with the flange holes of the third fixing member 30, and the flange plates are bolted with the third fixing member 30; S30, the top of the plurality of steel pipes 40 is one by one inserted into the plurality of installation holes 10a of the first fixing member 10, the holes of the flange plates of the steel pipes 40 are aligned with the flange holes of the first fixing member 10, and the flange plates are bolted with the first fixing member 10, so as to manufacture a group of floating body assemblies 100; S40, the remaining floating body assemblies 100 are manufactured according to steps S10-S30; S50, a plurality of support legs 211 of the wind turbine are one by one installed on the plurality of floating body assemblies 100.

[0043] It can be understood that the floating body structure of the present application includes three or more floating body combinations 100, each of which includes a first fixing member 10, a second fixing member 20, a third fixing member 30, and a plurality of steel pipes 40. The floating body structure is relatively simple, the floating body combination 100 is connected with the support leg 211 one by one, the overall volume of the floating body structure is greatly reduced, the floating body structure is effectively simplified under the premise of ensuring the strength of the floating body, the processing difficulty is reduced, the installation and manufacturing are more convenient, and the manufacturing cost is reduced. By using the above installation and manufacturing method, the installation and manufacturing difficulty is effectively reduced, and the cost is greatly reduced.

[0044] In addition, appropriate floating body combinations 100 can be selected according to different offshore wind turbine height capacity requirements, the height of the wind turbine can be effectively improved, all the connecting members of the floating body structure can be avoided to be below the sea level, the distance between the wind turbine blade 230 and the sea surface can also be avoided to be too close, and the anti-corrosion cost of the wind turbine is greatly reduced.

[0045] In the embodiment, before the step S10 of passing the plurality of steel pipes 40 through the plurality of installation through holes 20a of the second fixing member 20 one by one, aligning the holes of the flange plates at the positions of the steel pipes 40 with the flange holes on the second fixing member 20, and connecting the flange plates with the second fixing member 20 by bolts, the following steps can also be included: S09, welding flange plates on both ends and the middle part of the steel pipe 40.

[0046] First, a hollow circular steel pipe 40 is manufactured, and the bottom and top thereof are welded and sealed by steel cover plates to prevent seawater from entering, thereby forming a hollow closed circular steel pipe 40. The specific size can be designed according to different required buoyancy.

[0047] The present application uses flange plates to fix the steel pipes 40, which not only facilitates installation, but also helps to improve the uniformity of the circumferential force on both ends and the middle part of the steel pipe 40, which is beneficial to further enhance the ability of the offshore power generation wind turbine to resist harsh marine environment and prolong the service life.

[0048] In order to further improve the convenience of the installation of the wind turbine tower 210 and the floating body structure, referring to Figures 1 to 6 In an embodiment, the step S50 of installing a plurality of support legs 211 of the wind turbine on a plurality of floating body combinations 100 one by one specifically includes: S51, installing a plurality of steel plates with bolt holes on the support leg 211 of the wind turbine, and installing a plurality of connecting steel plates with bolt holes on the top of the first fixing member 10; S52, stacking the plurality of steel plates and the plurality of connecting steel plates one by one, and aligning the bolt holes of the steel plates with the bolt holes of the corresponding connecting steel plates; S53, the steel plate and the connecting steel plate are fixed by bolts to install a floating body combination 100 and a support leg 211; S54, the remaining floating body combinations 100 and the remaining support legs 211 are installed according to steps S51-S53; S55, the fan tower 210 is installed at the intersection position of the plurality of support legs 211, and a welded support steel member is built in the support legs 211 to complete the manufacturing and installation of the offshore power generation fan.

[0049] In this embodiment, the offshore power generation fan is installed from bottom to top. First, the floating body combination 100 is installed. Seven hollow closed circular steel pipes 40 with flange plates welded at the top, bottom and middle are sequentially inserted into the holes of the second fixing member 20, and the flange plate holes of the hollow closed circular steel pipe 40 and the second fixing member 20 are aligned, and then fixed and connected by bolts. Then, the third fixing member 30 is installed at the bottom of the hollow closed circular steel pipe 40, the third fixing member 30 is inserted from the bottom of the hollow closed circular steel pipe 40, and the bolt is installed in the hole when it is inserted, the flange holes of the two members are overlapped, and the bolt is sequentially inserted into the hole, and the bolt is fixed by the nut, so as to realize the fixed connection of the bottom of the floating body. Finally, the first fixing member 10 is installed at the top of the hollow closed circular steel pipe 40, the first fixing member 10 is inserted from the top of the hollow closed circular steel pipe 40, and the bolt is installed in the hole when it is inserted, the flange holes of the two members are overlapped, and the bolt is sequentially inserted into the hole, and the bolt is fixed by the nut, so as to realize the fixed connection of the top of the floating body. After the installation of one set of floating body combination 100 is completed, the remaining three sets of floating body combination 100 are installed according to the above steps, and after the installation of all floating body combinations 100 is completed, the wind turbine is installed.

[0050] The wind turbine tower is of lattice type, and steel members (i.e. support legs 211) are installed on the floating body combination 100, 9 vertical rectangular steel plates are welded at the bottom of the steel member, the number of steel plates is set according to different fan capacity, and bolt holes are uniformly arranged on the steel plates, the steel plate of the steel member and the vertical rectangular connecting steel plate of the top cover plate of the first fixing member 10 are overlapped, the bolt holes are aligned, and then fixed and connected by bolts. The remaining three support legs 211 are installed and connected according to the above steps, and then the fan tower 210 is installed at the intersection position of the four bottom support legs 211, and a support member is welded in the four support legs 211 to strengthen the strength of the fan tower 210 structure. Finally, the wind turbine is installed at the top of the fan tower 210, so as to realize the installation of the offshore power generation fan.

[0051] Compared with existing methods that increase the size of the floating structure and tower to meet the large capacity requirements of offshore wind turbines, this invention features a simple floating structure, with moderately sized floating bodies and other steel components for easy transportation. The on-site installation of the floating structure is also simple, effectively improving construction efficiency and quality. The lattice-type structure of the offshore wind turbine effectively improves the rigidity and strength of the original wind turbine tower while reducing the amount of steel used in the turbine. The floating structure and offshore wind turbine of this invention are low-cost, provide sufficient load-bearing capacity, and are relatively convenient and quick in terms of manufacturing processes, material transportation, and construction.

[0052] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for manufacturing and installing an offshore wind turbine, characterized in that, The manufacturing and installation method includes the following steps: S10. Pass several steel pipes one-to-one through the multiple mounting through holes of the second fastener, align the holes of the flange plate at this point of the steel pipe with the flange holes on the second fastener, and connect the flange plate to the second fastener with bolts. S20. Insert the bottoms of several steel pipes one-to-one into the multiple mounting holes of the third fastener, align the holes of the flange plate on the steel pipe with the flange holes on the third fastener, and connect the flange plate to the third fastener with bolts. S30. Insert the tops of several steel pipes one-to-one into the multiple mounting holes of the first fixing member, align the holes of the flange plate on the steel pipe with the flange holes on the first fixing member, and use bolts to connect the flange plate to the first fixing member to create a set of floating body assembly. S40. Produce the remaining float assembly according to steps S10-S30; S50. Install the multiple support legs of the wind turbine one-to-one onto the multiple floating body assemblies.

2. The method for manufacturing and installing an offshore wind turbine as described in claim 1, characterized in that, Step S50, which involves installing the multiple support legs of the wind turbine one-to-one onto the multiple floating body assemblies, specifically includes: S51. Install several steel plates with bolt holes on the support legs of the fan, and install several connecting steel plates with bolt holes on the top of the first fixing member. S52. Stack a plurality of steel plates and a plurality of connecting steel plates one-to-one, and align the bolt holes of the steel plates with the bolt holes of the corresponding connecting steel plates. S53. The steel plate and the connecting steel plate are fixed with bolts to install one of the float assemblies and the support leg; S54. Install the remaining float assembly and the remaining support legs according to steps S51-S53; S55. Install the wind turbine tower at the intersection of the multiple support legs, and weld support steel components in the support legs to complete the fabrication and installation of the offshore wind turbine.

3. The method for manufacturing and installing an offshore wind turbine as described in claim 1, characterized in that, Before step S10, which involves passing several steel pipes one-to-one through the multiple mounting holes of the second fastener, aligning the holes of the flange plate on the steel pipes with the flange holes on the second fastener, and connecting the flange plate to the second fastener with bolts, the method further includes: S09. Weld flange plates to both ends and the middle section of the steel pipe.

4. A floating structure, characterized in that, The system comprises at least three float assemblies, the top of which is adapted to connect to the support legs of a wind turbine. Each float assembly includes a first fixing member, a second fixing member, a third fixing member, and several steel pipes. The steel pipes are all closed hollow structures, passing through and connected to the second fixing member. The two ends of each steel pipe are connected to the first fixing member and the third fixing member, respectively. The projections of the several steel pipes in the height direction of the float assembly are arranged in an array.

5. The floating structure as described in claim 4, characterized in that, Flange plates are provided at both ends and the middle of the steel pipe. The steel pipe is connected to the first fixing member, the steel pipe to the second fixing member, and the steel pipe to the third fixing member through the flange plates at corresponding positions. The diameter or width of the flange plates located at both ends of the steel pipe is smaller than the diameter or width of the flange plate located in the middle of the steel pipe.

6. The floating structure as described in claim 5, characterized in that, The second fastener is petal-shaped and has several mounting through holes for one-to-one insertion of several steel pipes and several first flange holes arranged around the mounting through holes. The mounting through holes are arranged in an array, and the several first flange holes are adapted to be threadedly connected to the bolts connecting the flange plate.

7. The floating structure as described in claim 5, characterized in that, The first fastener has several mounting holes on one end face connected to the steel pipe for one-to-one installation of several ends of several steel pipes and several second flange holes arranged around the mounting holes. The mounting holes are arranged in an array, and the several second flange holes are adapted to be threadedly connected to the bolts connecting the flange plate. The third fastener has the same structure as the first fastener, both being petal-shaped, and the sides of both having the mounting holes are arranged opposite each other.

8. The floating structure as described in claim 4 or 5, characterized in that, The top of the first fixing member is provided with several connecting steel plates, which are used to connect with the steel plates of the support legs of the fan. The multiple connecting steel plates are evenly distributed on the first fixing member and all extend vertically.

9. The floating structure as described in claim 4, characterized in that, The outer surface of the float assembly is coated with an anti-corrosion coating.

10. An offshore wind turbine, characterized in that, The system includes a fan and a floating structure as described in any one of claims 4-9, wherein the bottom of the fan is provided with multiple support legs, and the multiple support legs are installed one-to-one on multiple floating body assemblies of the floating structure; The wind turbine includes a wind turbine tower, a nacelle, a generator set, and blades. The nacelle is fixed to the top of the wind turbine tower, the generator set is installed inside the nacelle, and the blades are located outside the nacelle and connected to the generator set.

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