Steel structure base of wind turbine

Abstract

The utility model relates to a wind turbine steel structure base which is of a detachable split structure and comprises a base body, a pair of side plates and a pair of second L-shaped steel bars, and the base body comprises a rectangular body bottom plate, a plurality of bottom reinforcing rib plates, a body stand column, an installation flange plate and a plurality of top reinforcing rib plates. The bottom reinforcing rib plates are circumferentially arranged around the main body stand column at intervals and are fixedly connected with the main body bottom plate and the main body stand column; the top reinforcing rib plates are circumferentially arranged around the main body stand column at intervals and are fixedly connected with the mounting flange plate and the main body stand column; the pair of side plates are symmetrically arranged at the two ends of the short edge of the main body bottom plate and form a square base plate together with the main body bottom plate, and each side plate is fixedly connected with the main body bottom plate through first L-shaped steel bars. The pair of second L-shaped steel bars are symmetrically arranged at the two ends of the long side of the main body bottom plate, the two ends of each second L-shaped steel bar are fixedly connected with the pair of side plates respectively, and the middle of each second L-shaped steel bar is fixedly connected with the main body bottom plate. The device is convenient to transport and install, easy to level, short in construction period and stable to install.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbines, in particular to a steel structure base for a wind turbine. Background Art

[0002] Humans conduct scientific research in Antarctica and establish various Antarctic research stations. In order to reduce the negative impact on nature, the green power supply of the research stations is particularly important. Since Antarctica has abundant wind resources, it is imperative to use this wind resource to power conventional equipment in the research stations.

[0003] The installation of wind turbines is closely related to a solid foundation, which requires a good foundation to install the tower and wind turbine. However, due to the low ambient temperature in Antarctica, some places are frozen all year round. Although there is a melting season in some places, the basic construction conditions are still extremely harsh. Traditional reinforced concrete construction has become particularly difficult. The site is easily frozen through, and people have a short working time outdoors. Concrete proportioning, concrete mixing and maintenance are all great challenges. There must be a basic solution that breaks the traditional treatment to meet the extremely severe environment and construction conditions.

[0004] In addition, there are many special application scenarios like Antarctica (where the construction is difficult and the construction time required is extremely short), such as unmanned small islands, hydrographic geological and meteorological sea areas, etc., and it has become quite urgent to realize green energy supply. Utility Model Content

[0005] In order to overcome the above problems, it would be advantageous for the utility model to provide a wind turbine steel structure base that is convenient for construction and shortens the construction period.

[0006] To this end, according to one aspect of the utility model, a wind turbine steel structure base is provided, which is constructed as a detachable split structure and includes:

[0007] A base body, comprising a rectangular main body bottom plate, a plurality of bottom reinforcing ribs, a main body column located at the center of the main body bottom plate, a mounting flange located on the top of the main body column, and a plurality of top reinforcing ribs, wherein the plurality of bottom reinforcing ribs are arranged at intervals around the main body column and are respectively fixedly connected to the top surface of the main body bottom plate and the main body column, and the plurality of top reinforcing ribs are arranged at intervals around the main body column and are respectively fixedly connected to the bottom surface of the mounting flange and the main body column;

[0008] A pair of side plates, which are symmetrically arranged at both ends of the short sides of the main bottom plate and together with the main bottom plate form a square base plate, wherein each side plate is fixedly connected to the main bottom plate via a plurality of first L-shaped steel bars located on its upper surface;

[0009] A pair of second L-shaped steel bars are symmetrically arranged at the two ends of the long side of the main body bottom plate, wherein each second L-shaped steel bar is fixedly connected to a pair of side plates at its two ends and to the main body bottom plate in the middle.

[0010] Furthermore, the above-mentioned wind turbine steel structure base also includes multiple horizontal adjustment components, each horizontal adjustment component includes a mounting bolt, a pair of anti-loosening nuts, a height adjustment nut and a homemade horizontal adjustment nut, and a plurality of mounting holes corresponding to the number of the multiple horizontal adjustment components are provided on the mounting flange, wherein the mounting bolt passes through the mounting flange from the bottom of the mounting hole and is fixed by the pair of anti-loosening nuts, and the height adjustment nut is screwed on the mounting bolt above the pair of anti-loosening nuts, and the homemade horizontal adjustment nut has its bottom screwed on the mounting bolt above the height adjustment nut, and its top is suitable for screwing on the fastening bolt that passes through the bottom flange of the wind turbine tower.

[0011] Furthermore, the self-made horizontal adjustment nut is provided with an internal threaded hole running through the entire height thereof, and both ends of the self-made horizontal adjustment nut are externally cylindrical, and the middle external portion is milled with a hexagonal surface.

[0012] Furthermore, the mounting holes on the mounting flange are through holes; the mounting bolts are national standard 8.8s bolts, the anti-loosening nuts and height adjustment nuts are both national standard nuts, and the homemade level adjustment nuts are higher than the national standard nuts.

[0013] Furthermore, the feature is that it also includes a pair of third L-shaped steel bars, which are respectively fixed to a pair of side plates and arranged perpendicular to the first L-shaped steel bars.

[0014] Furthermore, the first L-shaped steel bar, the second L-shaped steel bar and the third L-shaped steel bar are fixedly connected via a plurality of fastening components, each of which includes a fastening bolt, a spring washer and a flat washer.

[0015] Furthermore, the base body is arranged so that the long side of the base bottom plate faces the perennial wind direction of the wind turbine application site.

[0016] Furthermore, a plurality of water leakage holes are arranged on the main body bottom plate of the base body.

[0017] Furthermore, a lifting auxiliary structure is arranged on the base body.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] 1) The above-mentioned wind turbine steel structure base can be used in different special application scenarios. For example, in the permafrost area of ​​Antarctica, after digging the pit, the wind turbine steel structure base is hoisted into the pit as a whole, backfilled with water, and the water turns into ice, and the tower and wind turbine can be installed. The original four-week cycle of the entire wind power project (foundation construction and maintenance) can be shortened to 2-3 days, greatly shortening the construction period; the same effect is also achieved for the application scenario of backfilling sand and gravel;

[0020] 2) By making the above-mentioned wind turbine steel structure base into a detachable split structure, i.e. a spliced ​​structure, it can meet the requirements of conventional container transportation; each component such as the base body has a lifting auxiliary structure to facilitate lifting and transfer operations;

[0021] 3) The installation flange and top stiffener plate on the top of the main column of the wind turbine steel structure base can reduce stress concentration, and the rectangular main bottom plate and bottom stiffener plate can disperse the load to the surroundings;

[0022] 4) If it is a permanently frozen area in Antarctica, the bottom of the pit foundation can be made level by watering and freezing. If the pit foundation is excavated in a soil environment, the bottom of the pit foundation needs to be compacted and leveled. However, no matter which operation is performed, after the steel structure base of the wind turbine is installed, it is likely that the horizontality of the installation flange surface will still be low. The level adjustment component of the utility model can be used for the final level adjustment at this time to meet the state that the wind turbine tower and the wind turbine are fixed to a state where the plumb bob is on the ground, so that the wind turbine and the tower can obtain better stability;

[0023] 5) Since the structure of the self-made horizontal adjustment nut is much higher than that of the national standard nut, it can be used to adjust the height of the upper end surface to adapt to the horizontal conditions of the foundation pit base surface, which may make the tower and wind turbine installed later in a plumb state, and meet the role of connecting the upper and lower parts; since the self-made horizontal adjustment nut has cylindrical surfaces at both ends and a hexagonal surface in the middle, it is convenient for an open-end wrench to clamp or apply torque; the internal threaded hole of the self-made horizontal adjustment nut runs through the whole process, one end can be screwed into the threaded head of the national standard 8.8s bolt, and the other end is used to screw into the bolt used to fix the wind turbine tower;

[0024] 6) Through the staggered layout of the first to third L-shaped steel bars, the base body and the side plate are connected through national standard bolts, spring washers and flat washers, which can effectively ensure the firmness of the connection between the base body and the side plate, and also improve the overall rigidity of the base body and the side plate in the X and Y directions on the horizontal plane;

[0025] 7) Through holes are set on the mounting flange of the wind turbine steel structure base instead of threaded holes, which can facilitate the post-hot-dip galvanizing process. At the same time, a double nut structure, i.e. a pair of anti-loosening nuts, is used to prevent loosening;

[0026] 8) Several water leakage holes are arranged on the main bottom plate of the base body, which can fully fill the gap at the bottom of the bottom plate;

[0027] 9) The main base plate of the base is rectangular, which can give full play to the rigidity of the wind turbine steel structure base, and the long side of the main base plate points to the year-round wind direction of the project site, which further increases the stability of the wind turbine steel structure base.

[0028] These and other aspects of the present invention will be more clearly explained by referring to the embodiments described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The structure and further objects and advantages of the present invention will be better understood through the following description in conjunction with the accompanying drawings, in which the same reference numerals identify the same elements:

[0030] Figure 1 This is a three-dimensional schematic diagram of the external structure of a wind turbine steel structure base according to a specific embodiment of the utility model. For the sake of clarity, the figure shows a partial structure where the mounting flange of the base body is connected to the wind turbine tower;

[0031] Figure 2 yes Figure 1 A schematic longitudinal section diagram of a steel structure base structure of a wind turbine is shown;

[0032] Figure 3 yes Figure 1 An enlarged schematic diagram of a portion of the structure where the mounting flange of the base body is connected to the wind turbine tower;

[0033] Figure 4 yes Figure 1 An enlarged view of a partial A of the wind turbine steel base structure shown;

[0034] Figure 5 yes Figure 2 An enlarged view of part B of the steel base structure of the wind turbine is shown. DETAILED DESCRIPTION

[0035] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings. However, it should be understood that the embodiments disclosed herein are only typical examples of the present invention, which can be embodied in various forms. Therefore, the specific details disclosed herein are not considered to be restrictive, but only as a basis for the claims and as a representative basis for teaching those skilled in the art to apply the present invention differently in any appropriate manner in practice.

[0036] In this document, directional expressions such as "inside", "outside", "top", "bottom", etc., used to explain the structure and / or movement of various parts of the disclosed embodiments are not absolute but relative. These expressions are appropriate when the various parts of the disclosed embodiments are located in the positions shown in the figures, and if the position or reference system of the disclosed embodiments changes, these expressions should also change according to the change of the position or reference system of the disclosed embodiments.

[0037] like Figure 1 and Figure 2 As shown, a wind turbine steel structure base 100 according to a specific embodiment of the present invention is constructed as a detachable split structure, which includes a base body 1, a pair of side plates 3, a plurality of first L-shaped steel bars 5, a pair of second L-shaped steel bars 7 and a pair of third L-shaped steel bars 9. Figure 1 and Figure 3 As shown, in this embodiment, the base body 1 includes a rectangular main body bottom plate 10, a plurality of bottom reinforcing ribs 12, a main body column 14 located at the center of the main body bottom plate 10, a mounting flange 16 located on the top of the main body column 14, and a plurality of top reinforcing ribs 18 (in this embodiment, the base body 1 is a welded part). The plurality of bottom reinforcing ribs 12 are arranged circumferentially around the main body column 14 and are respectively connected to the main body bottom plate 10 and the main body column 14 above the main body bottom plate 10, and the plurality of top reinforcing ribs 18 are arranged circumferentially around the main body column 14 and are respectively connected to the mounting flange 16 and the main body column 14 below the mounting flange 16.

[0038] like Figure 1 and Figure 4 As shown, in this embodiment, a pair of side plates 3 are symmetrically arranged at both ends of the short side 101 of the main body bottom plate 10 (that is, the side plates 3 are perpendicular to the short side 101), and together with the main body bottom plate 10, they form a square base plate to improve the installation stability of the wind turbine steel structure base 100, wherein each side plate 3 is fixedly connected to the main body bottom plate 10 via a plurality of first L-shaped steel bars 5. Specifically, the first L-shaped steel bars 5 are fixedly connected to the side plates 3 and the main body bottom plate 10 via a plurality of fastening components 8. The pair of second L-shaped steel bars 7 are symmetrically arranged at both ends of the long side 103 of the main body bottom plate 10 (the second L-shaped steel bars 7 are perpendicular to the long side 103), wherein each second L-shaped steel bar 7 is fixedly connected to a pair of side plates 3 at both ends, and fixedly connected to the main body bottom plate 10 in the middle, and similarly, this connection is also completed via a plurality of fastening components 8. The pair of third L-shaped steel bars 9 are respectively fixedly connected to the pair of side plates 3 and arranged perpendicularly to the first L-shaped steel bars 5. The third L-shaped steel bars 9 are also fixedly connected to the side plates 3 via a plurality of fastening components 8. Figure 4 and Figure 5 As shown, and refer to Figure 1 and Figure 2The fastening assembly 8 includes a fastening bolt 80 , a spring washer 81 and a flat washer 82 .

[0039] For example Figures 1 to 3 As shown, in the present embodiment, the wind turbine steel structure base 100 also includes a plurality of horizontal adjustment components 2, each of which includes a mounting bolt 21, a pair of anti-loosening nuts 23, a height adjustment nut 25 and a self-made horizontal adjustment nut 27, and a plurality of mounting holes (not shown) corresponding to the number of the plurality of horizontal adjustment components 2 are provided on the mounting flange 16. In the present embodiment, the mounting holes on the mounting flange 16 are through holes, and providing through holes is more convenient for processing after hot-dip galvanizing than providing threaded holes; the mounting bolt 21 is a national standard 8.8s bolt; the anti-loosening nut 23 and the height adjustment nut 25 are both national standard nuts. Among them, the mounting bolt 21 passes through the mounting flange 16 from the bottom of the mounting hole and is fixed on the mounting flange 16 through the pair of anti-loosening nuts 23 (arranged up and down, and the double nut structure is adopted to prevent loosening). The height adjustment nut 25 is screwed on the mounting bolt 21 above the pair of anti-loosening nuts 23, and the homemade horizontal adjustment nut 27 is much higher than the national standard nut. Its bottom is screwed on the mounting bolt 21 above the height adjustment nut 25, and its top is suitable for screwing on the fastening bolt 221 that passes through the bottom flange 206 of the wind turbine tower 200.

[0040] In this embodiment, the self-made horizontal adjustment nut 27 is provided with an internal threaded hole (not shown) running through the entire height thereof, and both ends of the self-made horizontal adjustment nut 27 are externally cylindrical surfaces 271, and the middle externally is milled with a hexagonal surface 273, such as Figure 3 The reason why the self-made horizontal adjustment nut 27 is much higher than the national standard nut in structure is that it is mainly used to adjust the different upper end surface heights to adapt to the different horizontal conditions of the foundation pit base surface, so that the wind turbine tower 200 and the wind turbine (not shown) installed later can be in a plumb state, and it can meet the role of connecting the upper and lower parts. The structure of the cylindrical surfaces 271 at the two ends and the hexagonal surface 273 in the middle is convenient for the open-end wrench to clamp or apply torque.

[0041] It should be noted that, Figures 1 to 3 As shown, in this embodiment, a plurality of leakage holes 105 are provided on the main bottom plate 10 of the base body 1. The setting of the leakage holes 105 enables the gap below the main bottom plate 10 to be fully filled. It should be noted that the backfill material of the pit foundation for placing the wind turbine steel structure base 100 is directly water or ice in Antarctica to solve the problem of green electricity supply in Antarctica; for some scientific research stations located near the coastline with rocky continents, the backfill material is sand and stone; in order to facilitate lifting and transportation operations, a lifting auxiliary structure 140 is provided on the base body 1.

[0042] It should also be noted that the main bottom plate 10 is set to a rectangular shape, which can give full play to the rigidity of the base body 1, and the base body 10 is arranged in the pit foundation so that the long side 103 of the main bottom plate 10 faces the year-round wind direction of the wind turbine application site, which can also further improve the stability of the entire wind turbine steel structure base 100.

[0043] In addition, the wind turbine steel structure base 100 is constructed as a low-temperature low-alloy steel structure in this embodiment so as to be applied in extremely cold regions such as Antarctica. In another real-time mode, if the application scenario is not a cold region such as an ordinary island region, the wind turbine steel structure base 100 can be made of conventional low-alloy high-strength structural steel.

[0044] The technical content and technical features of the utility model have been disclosed above, but it can be understood that under the creative idea of ​​the utility model, those skilled in the art can make various changes and improvements to the above structure, including the combination of technical features disclosed or claimed separately here, and other combinations that obviously include these features. These deformations and / or combinations all fall within the technical field involved in the utility model and fall within the protection scope of the claims of the utility model.

Claims

1. A wind turbine steel structure base, characterized in that It is constructed into a detachable split structure and includes: A base body, comprising a rectangular main body bottom plate, a plurality of bottom reinforcing ribs, a main body column located at the center of the main body bottom plate, a mounting flange located on the top of the main body column, and a plurality of top reinforcing ribs, wherein the plurality of bottom reinforcing ribs are arranged at intervals around the main body column and are respectively fixedly connected to the top surface of the main body bottom plate and the main body column, and the plurality of top reinforcing ribs are arranged at intervals around the main body column and are respectively fixedly connected to the bottom surface of the mounting flange and the main body column; A pair of side plates, which are symmetrically arranged at both ends of the short sides of the main bottom plate and together with the main bottom plate form a square base plate, wherein each side plate is fixedly connected to the main bottom plate via a plurality of first L-shaped steel bars located on its upper surface; A pair of second L-shaped steel bars are symmetrically arranged at the two ends of the long side of the main body bottom plate, wherein each second L-shaped steel bar is fixedly connected to a pair of side plates at its two ends and to the main body bottom plate in the middle.

2. The wind turbine steel structure base according to claim 1, characterized in that It also includes multiple horizontal adjustment components, each of which includes a mounting bolt, a pair of anti-loosening nuts, a height adjustment nut and a self-made horizontal adjustment nut, and the mounting flange is provided with a plurality of mounting holes corresponding to the number of the multiple horizontal adjustment components, wherein the mounting bolt passes through the mounting flange from the bottom of the mounting hole and is fixed by the pair of anti-loosening nuts, and the height adjustment nut is screwed on the mounting bolt above the pair of anti-loosening nuts, and the self-made horizontal adjustment nut has its bottom screwed on the mounting bolt above the height adjustment nut, and its top is suitable for being screwed on the fastening bolt that passes through the bottom flange of the wind turbine tower.

3. The wind turbine steel structure base according to claim 2, characterized in that: The self-made horizontal adjustment nut is provided with an internal threaded hole running through the entire height thereof, and the two ends of the self-made horizontal adjustment nut are externally cylindrical, and the middle externally is milled with a hexagonal surface.

4. The wind turbine steel structure base according to claim 2, characterized in that: The mounting holes on the mounting flange are through holes; the mounting bolts are national standard 8.8s bolts; the anti-loosening nuts and the height adjustment nuts are both national standard nuts; and the self-made level adjustment nuts are higher than national standard nuts.

5. The wind turbine steel structure base according to any one of claims 1 to 4, characterized in that It also includes a pair of third L-shaped steel bars, which are respectively fixedly connected to the pair of side plates and arranged perpendicularly to the first L-shaped steel bars.

6. The wind turbine steel structure base according to claim 5, characterized in that: The fixed connection of the first L-shaped steel bar, the second L-shaped steel bar and the third L-shaped steel bar is completed via a plurality of fastening components.

7. The wind turbine steel structure base according to claim 6, characterized in that: Each of the fastening assemblies comprises a fastening bolt, a spring washer and a flat washer.

8. The wind turbine steel structure base according to any one of claims 1 to 4, characterized in that: The base body is arranged so that the long side of the base bottom plate faces the perennial wind direction of the wind turbine application site.

9. The wind turbine steel structure base according to any one of claims 1 to 4, characterized in that: A plurality of water leakage holes are arranged on the main body bottom plate of the base body.

10. The wind turbine steel structure base according to any one of claims 1 to 4, characterized in that: The base body is provided with a hoisting auxiliary structure.

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