Steel plate concrete transition section of offshore wind turbine jacket

Abstract

The utility model discloses a steel plate concrete transition section of an offshore wind turbine jacket. The steel plate concrete transition section comprises a samson post, a bottom plate, a main leg, a web plate, a top cover plate, a bottom sealing plate, an outer sealing plate and a side plate, the bottom plate is fixed to the bottom of the samson post and connected with the main legs, the outer sealing plate surrounds the upper portion of the samson post, a gap is reserved between the outer sealing plate and the samson post, and the bottom sealing plate seals a bottom opening formed between the outer sealing plate and the samson post, so that a first U-shaped space is formed among the samson post, the bottom sealing plate and the outer sealing plate. Two sides of each main leg are respectively connected with the samson post and the outer sealing plate through a side plate, the top of each main leg is connected with the outer sealing plate through a top cover plate, the side plates are fixed on the bottom plate and are connected with the top cover plate, a web plate is arranged between the outer sealing plate and each main leg, the web plates are respectively connected with the main legs, the top cover plate and the outer sealing plate, and the web plates are fixed on the bottom plate. A steel bar sleeve cage is arranged in the first U-shaped space, and the first U-shaped space is filled with concrete. According to the utility model, the overall rigidity of the structure is improved, and meanwhile, load transmission can be taken into consideration.

Description

TECHNICAL FIELD

[0001] The utility model relates to offshore wind power's technical field especially is offshore wind turbine guide pipe frame steel plate concrete transition section. BACKGROUND

[0002] At present, offshore wind power is widely applied in single pile foundation in offshore field, but offshore foundation structure needs to bear the common action of wind load, wave current load, wave load and other environmental loads, although single pile foundation is simple in processing and manufacturing, but its stability is poor, sensitive to seawater scouring and will lead to pile buckling when the water depth is deep.

[0003] The guide pipe frame foundation is suitable for the sea area with water depth of 10-50m. The spatial quadrilateral structure makes the overall rigidity large, the anti-overturning and anti-sliding capacity strong, and the guide pipe frame foundation has been applied in batch in offshore booster station foundation, wind power demonstration project and offshore wind power project, thereby confirming the stability and applicability of the guide pipe frame foundation. The offshore wind turbine guide pipe frame foundation mainly comprises a guide pipe frame and a transition section.

[0004] With the large-scale of offshore wind turbine installed capacity, the large-scale of wind turbine capacity also means the increase of wind turbine load, and the existing common transition section types, such as inclined strut type, cross box beam type, plate-shaped composite inclined strut type and cone type, are difficult to bear the load transmitted by the upper wind turbine. The action of the horizontal load and the bending and torsional load of the upper part will cause the stress level of the joint between the general column and the top cover plate to be too high, and when the load is transmitted to the guide pipe frame body through the transition section, stress concentration is easily caused, thereby causing the transition section structure to be unable to meet the requirements of ultimate strength and fatigue strength. Therefore, a new type of guide pipe frame transition section structure has important significance for ensuring the stable operation of the wind power foundation UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the shortcomings and deficiencies of prior art, and provides a safe and reliable offshore wind turbine guide pipe frame steel plate concrete transition section, which adopts the reinforced structure of reinforced concrete to improve the overall rigidity of the transition section structure, utilizes the compression resistance of the concrete structure to effectively reduce the high stress phenomenon of the area where the general column is connected with the top cover plate, simultaneously optimizes the load transmission path to transmit the load from the upper structure to the guide pipe frame body more uniformly, and adopts steel plate concrete to strengthen the main leg which mainly bears the load transmission of the side plate, improves the stability of the steel plate and improves the yield resistance and fatigue resistance of the structure.

[0006] To achieve the above-mentioned purpose, the technical solution provided by the present invention is as follows: a steel plate concrete transition section of an offshore wind turbine jacket, comprising a general column, a bottom plate, a main leg, a web plate, a top cover plate, a bottom sealing plate, an outer sealing plate and a side plate; the top of the general column is connected to the tower flange of the wind turbine through a flange, the bottom plate is fixed to the bottom of the general column and is respectively connected to a plurality of main legs, the plurality of main legs are evenly distributed around the general column, the outer sealing plate surrounds the upper part of the general column and a gap is reserved between the general column and the bottom sealing plate seals the bottom opening formed between the outer sealing plate and the general column, so that the general column, the bottom sealing plate and the outer sealing plate A first U-shaped space with an open top and a closed bottom is formed between the main legs. The two sides of each main leg are connected to the general column and the outer sealing plate respectively through a side plate, and the top is connected to the outer sealing plate through a top cover plate. The side plates are fixed on the bottom plate and connected to the top cover plate. The general column, bottom plate, top cover plate, bottom sealing plate, outer sealing plate and side plates together form a closed space. A web is provided between the outer sealing plate and each main leg. The web is in the above-mentioned closed space and is respectively connected to the main leg, the top cover plate and the outer sealing plate. A steel cage is provided in the first U-shaped space, and the entire first U-shaped space is filled with concrete.

[0007] Furthermore, the steel cage includes vertical steel bars and circumferential steel bars, wherein the circumferential steel bars pass through the side plates and are tied together with the vertical steel bars to form a steel cage.

[0008] Furthermore, the annular reinforcement is denser at the top cover plate.

[0009] Furthermore, it also includes a main leg annular inner shell and a main leg bottom sealing plate. The main leg annular inner shell is located inside the main leg and is coaxial with the main leg, with a gap reserved between them. The main leg bottom sealing plate seals the bottom opening formed between the main leg annular inner shell and the main leg, so that a second U-shaped space with an open top and a closed bottom is formed between the main leg, the main leg annular inner shell and the main leg bottom sealing plate, and the second U-shaped space is filled with concrete.

[0010] Furthermore, it also includes an inner annular support plate and an inner vertical support plate, which are arranged in the general column and are respectively connected to the general column. The inner annular support plate is coaxial with the general column and is at the same height as the top cover plate. It is connected to the inner vertical support plate and supported by the inner vertical support plate. There are multiple inner vertical support plates distributed along the inner wall of the general column, and one inner vertical support plate corresponds to one side plate, and its position is close to the corresponding side plate.

[0011] Furthermore, a toggle plate is provided between the main leg and the bottom plate.

[0012] Furthermore, the toe end of the web at the main leg is in the shape of a toggle plate.

[0013] Furthermore, the web is an arc-shaped plate.

[0014] Further, the top cover plate is spliced by flat plate and inclined plate.

[0015] Further, the middle of the colonel column is provided with an opening.

[0016] Further, the colonel column, the bottom plate, the main leg, the web, the top cover plate, the bottom sealing plate, the inner annular support plate, the inner vertical support plate, the outer sealing plate, the side plate and the elbow plate are steel plates.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0018] 1. The steel plate concrete structure is adopted, the concrete filled between the steel plates can improve the stability of the steel plates.

[0019] 2. The compressive performance of the concrete is fully utilized, and the tensile performance is improved by adopting the reinforcing cage.

[0020] 3. The web is arranged between the two side plates, the load transmitted by the colonel column is shared by the side plates, the web is arranged as the elbow plate structure at the main leg, the stress transmission is more uniform, the stress concentration phenomenon is effectively reduced, the stress concentration of the elbow plate of the main leg is reduced, and fatigue damage is avoided.

[0021] 4. The main leg, the bottom plate and the side plate are arranged as the steel plate concrete structure, the load transmitted by the side plate and the web can be fully borne, and the load is transmitted to the jacket body. DRAWINGS

[0022] Figure 1 It is a perspective view of the steel plate concrete transition section of the offshore wind turbine jacket.

[0023] Figure 2 It is a sectional view of the steel plate concrete transition section of the offshore wind turbine jacket.

[0024] Figure 3 It is a front view of the steel plate concrete transition section of the offshore wind turbine jacket.

[0025] Figure 4 It is a plan view of the steel plate concrete transition section of the offshore wind turbine jacket.

[0026] Figure 5 It is a schematic view of the reinforcing cage filled with concrete.

[0027] Figure 6 is one of the cross-sectional views of the main leg.

[0028] Figure 7 is the second cross-sectional view of the main leg. DETAILED DESCRIPTION

[0029] The utility model will be described in further detail below in connection with the embodiments and the drawings, but the embodiments of the utility model are not limited thereto.

[0030] As Figures 1 to 7 shown, the embodiment discloses a kind of offshore wind turbine jacket steel plate concrete transition section, including general column 1, bottom plate 2, main leg 3, web 4, top cover plate 5, bottom sealing plate 6, outer sealing plate 9 and side plate 10;The top of the general column 1 is connected with the tower flange flange of wind turbine, and the bottom plate 2 is fixed at the bottom of general column 1, and is connected with four main legs 3 respectively, and the four main legs 3 are evenly distributed around the general column 1, the outer sealing plate 9 is around the upper portion of general column 1, and gap is reserved between the general column 1, the bottom sealing plate 6 seals the bottom opening formed between outer sealing plate 9 and general column 1, so that the general column 1, bottom sealing plate 6 and outer sealing plate 9 form the first U-shaped space (i.e. longitudinal section is U-shaped) of top opening, bottom closure, each main leg 3 is connected with general column 1 and outer sealing plate 9 respectively through a side plate 10 on both sides, and its top is connected with outer sealing plate 9 through a top cover plate 5, the side plate 10 is fixed on bottom plate 2, and is connected with top cover plate 5, the general column 1, bottom plate 2, top cover plate 5, bottom sealing plate 6, outer sealing plate 9 and side plate 10 together enclose a closed space, the outer sealing plate 9 is provided with web 4 between each main leg 3, the web 4 is in the above-mentioned closed space, and is connected with main leg 3, top cover plate 5 and outer sealing plate 9 respectively, without affecting the structure manufacturing and overhaul, the load borne by side plate 10 can be effectively shared by web 4, steel reinforcement cage 202 is arranged in the first U-shaped space, and the entire first U-shaped space is filled with concrete 201 (in the form of grouting).

[0031] Preferably, the steel reinforcement cage 202 includes vertical reinforcement 203 and ring reinforcement 204, wherein the ring reinforcement 204 passes through the side plate 10 and is tied with the vertical reinforcement 203 to form the steel reinforcement cage 202, and the ring reinforcement 204 is appropriately densified at the top cover plate 5 to further improve the rigidity at the place.

[0032] Preferably, the main leg annular inner shell 302 is located in the main leg 3 and coaxial with the main leg 3, and a gap is reserved between the main leg annular inner shell 302 and the main leg 3, and the main leg bottom sealing plate 303 seals the bottom opening formed between the main leg annular inner shell 302 and the main leg 3, so that the main leg 3, the main leg annular inner shell 302 and the main leg bottom sealing plate 303 form a second U-shaped space (i.e. the longitudinal section is U-shaped) with a top opening and a bottom sealing, and the second U-shaped space is filled with concrete 301.

[0033] Preferably, the inner annular support plate 7 and the inner vertical support plate 8 are arranged in the general column 1 and connected with the general column 1 respectively, the inner annular support plate 7 is coaxial with the general column 1 and at the same height with the top cover plate 5, the inner annular support plate 7 is connected with and supported by the inner vertical support plate 8, and the inner vertical support plate 8 has a plurality of inner vertical support plates 8 distributed along the inner wall of the general column 1, and one inner vertical support plate 8 corresponds to one side plate 10 and is close to the corresponding side plate 10.

[0034] Preferably, the elbow plate 11 is arranged between the main leg 3 and the bottom plate 2 for reinforcement.

[0035] Preferably, the toe end of the web plate 4 at the main leg 3 is in the shape of an elbow plate, so that the stress transmission is more uniform.

[0036] Preferably, the web plate 4 is an arc-shaped plate.

[0037] Preferably, the top cover plate 5 is formed by splicing a flat plate and an inclined plate.

[0038] Preferably, the general column 1 is provided with an opening 12 in the middle for maintenance.

[0039] Preferably, the general column 1, the bottom plate 2, the main leg 3, the web plate 4, the top cover plate 5, the bottom sealing plate 6, the inner annular support plate 7, the inner vertical support plate 8, the outer sealing plate 9, the side plate 10 and the elbow plate 11 are steel plates, and the connection between the components is achieved by welding.

[0040] In summary, the offshore wind turbine jacket steel plate concrete transition section provided by the utility model makes full use of the structural performance of reinforced concrete, improves the overall rigidity of the structure, takes into account the transmission of load, and effectively reduces the high stress area of the general column and the top cover plate, the leg column and the side plate area due to the small density of concrete without increasing the overall structure weight. It provides a prospect for the development and application of large-capacity models and is worth promoting.

[0041] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A steel plate concrete transition section for an offshore wind turbine jacket, characterized in that: The invention comprises a general column (1), a bottom plate (2), a main leg (3), a web (4), a top cover plate (5), a bottom sealing plate (6), an outer sealing plate (9) and a side plate (10); the top of the general column (1) is connected to the tower flange of the wind turbine through a flange, the bottom plate (2) is fixed to the bottom of the general column (1) and is respectively connected to a plurality of main legs (3), the plurality of main legs (3) are evenly distributed around the general column (1), the outer sealing plate (9) surrounds the upper part of the general column (1) and reserves a gap between the general column (1), the bottom sealing plate (6) seals the bottom opening formed between the outer sealing plate (9) and the general column (1), so that a first U-shaped space with an open top and a closed bottom is formed between the general column (1), the bottom sealing plate (6) and the outer sealing plate (9), and each main leg Both sides of (3) are connected to the general column (1) and the outer sealing plate (9) respectively through a side plate (10), and the top is connected to the outer sealing plate (9) through a top cover plate (5). The side plate (10) is fixed on the bottom plate (2) and connected to the top cover plate (5). The general column (1), the bottom plate (2), the top cover plate (5), the bottom sealing plate (6), the outer sealing plate (9) and the side plates (10) together form a closed space. A web (4) is provided between the outer sealing plate (9) and each main leg (3). The web (4) is in the above-mentioned closed space and is respectively connected to the main leg (3), the top cover plate (5) and the outer sealing plate (9). A steel cage (202) is provided in the first U-shaped space, and the entire first U-shaped space is filled with concrete (201).

2. The offshore wind turbine jacket steel plate concrete transition section according to claim 1, characterized in that: The steel bar cage (202) comprises vertical steel bars (203) and circumferential steel bars (204), wherein the circumferential steel bars (204) pass through the side plates (10) and are tied together with the vertical steel bars (203) to form the steel bar cage (202).

3. The offshore wind turbine jacket steel plate concrete transition section according to claim 2, characterized in that: The annular reinforcement (204) is denser at the top cover plate (5).

4. The offshore wind turbine jacket steel plate concrete transition section according to claim 3, characterized in that: The invention also includes a main leg annular inner shell (302) and a main leg bottom sealing plate (303), wherein the main leg annular inner shell (302) is located inside the main leg (3) and is coaxial with the main leg (3), with a gap reserved therebetween, and the main leg bottom sealing plate (303) seals the bottom opening formed between the main leg annular inner shell (302) and the main leg (3), so that a second U-shaped space with an open top and a closed bottom is formed between the main leg (3), the main leg annular inner shell (302) and the main leg bottom sealing plate (303), and the second U-shaped space is filled with concrete (301).

5. The offshore wind turbine jacket steel plate concrete transition section according to claim 4, characterized in that: The utility model also includes an inner annular support plate (7) and an inner vertical support plate (8), wherein the inner annular support plate (7) and the inner vertical support plate (8) are arranged in the general column (1) and are respectively connected to the general column (1); the inner annular support plate (7) is coaxial with the general column (1) and is at the same height as the top cover plate (5); the inner annular support plate (7) is connected to the inner vertical support plate (8) and supported by the inner vertical support plate (8); a plurality of the inner vertical support plates (8) are distributed along the inner wall of the general column (1), and one inner vertical support plate (8) corresponds to one side plate (10), and its position is close to the corresponding side plate (10).

6. The offshore wind turbine jacket steel plate concrete transition section according to claim 5, characterized in that: A toggle plate (11) is provided between the main leg (3) and the bottom plate (2).

7. The offshore wind turbine jacket steel plate concrete transition section according to claim 6, characterized in that: The toe end of the web (4) at the main leg (3) is in the shape of a toggle plate.

8. The offshore wind turbine jacket steel plate concrete transition section according to claim 7, characterized in that: The web (4) is an arc-shaped plate, and the top cover (5) is formed by splicing a flat plate and an inclined plate.

9. The offshore wind turbine jacket steel plate concrete transition section according to claim 8, characterized in that: An opening (12) is provided in the middle of the general column (1).

10. The offshore wind turbine jacket steel plate concrete transition section according to claim 9, characterized in that: The general column (1), bottom plate (2), main leg (3), web plate (4), top cover plate (5), bottom sealing plate (6), inner annular support plate (7), inner vertical support plate (8), outer sealing plate (9), side plate (10) and elbow plate (11) are steel plates.

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