CN205875197U - Polygon marine wind power bucket foundation - Google Patents

Abstract

The utility model relates to an offshore wind power foundation structure, and discloses a polygonal offshore wind power cylinder foundation, which is composed of a polygonal cylinder structure at the lower part and a truss structure at the upper part; Sealed structure, the upper surface of the top cover is provided with a main beam and a secondary beam; the truss structure includes a transition section arranged above the center of the polygonal cylindrical structure, and a supporting steel pipe is uniformly arranged in a ring around the transition section, and the bottom end of the supporting steel pipe is fixed on the polygonal cylindrical structure. Inside the cylindrical structure, the upper part of the supporting steel pipe is connected and fixed to the transition section through upper and lower connecting steel pipes. The utility model is suitable for the marine geological conditions of the weak layer with a deep thickness on the surface of the seabed. It has a simple structure, is safe and reliable, and can be prefabricated as a whole on land. Quality, reduce construction costs, and promote the development of my country's offshore wind power industry.

Description

A polygonal offshore wind turbine foundation

technical field

The utility model relates to an offshore wind power foundation structure, in particular to a polygonal offshore wind torch type foundation.

Background technique

As a green, clean and renewable energy, wind energy has been favored by energy developers in various countries. At present, one of the bottlenecks restricting the large-scale development of offshore wind power in my country is the lack of an economically safe offshore wind power infrastructure suitable for my country's ocean characteristics. There are various types of offshore wind power foundation structures, including multi-pile jackets, single piles, tripod foundations, gravity foundations, barrel foundations, and floating foundations.

The barrel foundation is a form of foundation structure suitable for soft soil foundations. It uses a combination of self-weight and negative pressure to quickly complete offshore installation work, which is very attractive to wind farms with a short offshore construction window. At present, most offshore wind turbine foundations are cylindrical structures, which are difficult to process; at the same time, when the top cover of the single-tube foundation contacts the seabed mud surface, the middle part of the top cover can only provide a small amount of resistance to the bending moment of the wind turbine. Performance is not fully utilized.

Utility model content

Based on the purpose of improving the utilization rate of materials and reducing the difficulty of basic structure processing, the utility model proposes a polygonal offshore wind torch type foundation. The foundation structure is simple, easy to install, safe and reliable, and can effectively improve construction efficiency and quality. Realize efficient, economical and safe construction of offshore wind power.

In order to solve the above technical problems, the utility model is realized through the following technical solutions:

A polygonal offshore wind turbine foundation, characterized in that it consists of a lower polygonal cylindrical structure and an upper truss structure;

The polygonal cylindrical structure is a semi-sealed structure with a bottom opening formed by a cylinder wall and a top cover. The outer walls of the block are respectively surrounded by a polygonal structure, and the outer walls of the plurality of blocks are correspondingly arranged in parallel on the outer sides of the inner walls of the plurality of blocks, and the connecting lines of the adjacent inner walls are connected with the corresponding connecting lines of the adjacent outer walls. There are side walls; the top cover with polygonal inner and outer edges is arranged on the cylinder wall, and the inner and outer edges of the top cover are respectively connected to the top of the inner wall and the top of the outer wall; The upper surface of the top cover is provided with a main beam and a secondary beam, and the main beam is arranged on the upper part of the top cover corresponding to each of the inner wall, the outer wall and the side wall of the cylinder wall, and the top A plurality of secondary beams uniformly arranged in the circumferential direction and radial direction are arranged in each partition block divided by the main beam on the top of the cover;

The truss structure includes a transition section arranged above the polygonal cylindrical structure along the vertical centerline of the polygonal cylindrical structure, and a plurality of trusses are uniformly arranged in a ring around the transition section from bottom to top and from outside to inside. Inclined supporting steel pipes, the bottom end of each supporting steel pipe is fixed at the junction of adjacent main beams inside the polygonal cylindrical structure, the upper part of each supporting steel pipe and the transition section pass through the upper and lower Two connecting steel pipes are connected and fixed.

Wherein, the number of the inner wall, the outer wall and the side wall in the cylinder wall is the same, which is 3-8 pieces.

Wherein, the number of sides of the inner edge and the outer edge of the top cover is consistent with the number of sides of the inner wall, the outer wall or the side wall of the cylinder wall, which are 3-8 pieces.

Wherein, the number of the main beams is the sum of the numbers of the inner wall, the outer wall and the side wall in the cylinder wall.

Wherein, the number of the secondary beams uniformly arranged in the circumferential direction and the radial direction in each partition block divided by the main beam on the top of the roof is 2-6.

Wherein, the number of the supporting steel pipes is the same as that of the inner wall of the cylinder wall, both are 3-8.

Wherein, the centerline of the single supporting steel pipe and the centerline of the transition section are located on the same plane, and the included angle between the centerline of the single supporting steel pipe and the centerline of the transition section is 5-25 degrees.

Wherein, the elevation angle of each connecting steel pipe is 0-25 degrees.

The beneficial effects of the utility model are:

The polygonal offshore wind turbine foundation of the utility model is suitable for the marine geological conditions of the weak layer with a deep thickness on the seabed surface. Its structure is composed of a polygonal cylindrical structure at the bottom and a truss structure at the top. and the effective force transmission of the secondary beam, so that the huge bending moment transmitted by the wind turbine is converted into a small roof pressure and wall side friction, ensuring that the force of the polygonal cylindrical structure is distributed on the entire roof and wall, avoiding It solves the problem that only a small amount of force is provided in the middle of the top cover of the traditional cylindrical foundation, so that the material properties can be fully utilized; and the structural form of the polygonal cylindrical structure also significantly reduces the difficulty of processing. In addition, the entire structure can be prefabricated on land and has self-floating ability. During installation, it can be quickly submerged and installed under negative pressure. Therefore, it can significantly shorten the offshore construction time, reduce construction costs, and promote the development of my country's offshore wind power industry.

Description of drawings

Fig. 1 is the vertical view of the polygon offshore wind power cylinder type foundation provided by the utility model;

Fig. 2 is a top view of the polygonal offshore wind turbine foundation provided by the utility model.

In the above figure: 1. Main beam; 2. Secondary beam; 3. Top cover; 4. Tube wall; 5. Transition section; 6. Supporting steel pipe; 7. Connecting steel pipe.

detailed description

In order to further understand the invention content, characteristics and effects of the present utility model, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

Example 1

This embodiment discloses a polygonal offshore wind turbine foundation, which is composed of a polygonal cylindrical structure at the lower part and a truss structure at the upper part, and the whole is a steel structure.

The polygonal cylindrical structure is composed of main beam 1, secondary beam 2, top cover 3 and cylinder wall 4.

The top cover 3 and the cylinder wall 4 form a semi-sealed structure with a lower opening, so that the polygonal cylinder structure can be installed by sinking under negative pressure. The cylinder wall 4 includes multiple identical inner walls, identical external walls and multiple identical side walls, and the numbers of the inner walls, outer walls and side walls are consistent, generally 3-8. A plurality of inner walls encloses a polygonal structure, and a plurality of outer walls are arranged parallel to the plurality of inner walls to form a polygonal structure. The connecting lines of adjacent inner walls and the corresponding connecting lines of adjacent outer walls are connected with side walls by welding. A top cover 3 with a polygonal inner edge and a polygonal outer edge (consistent with the number of the inner wall, outer wall and side wall) is arranged on the cylinder wall 4, and the inner edge and the outer edge of the top cover 3 are respectively connected to the inner wall top and the outer edge of the cylinder wall 4. The tops of the outer walls are connected by welding. Thus, the polygonal cylindrical structure includes a plurality of compartments, and each compartment is a trapezoidal cross-section surrounded by a top cover 3 and four cylinder walls 4 (one inner wall, one outer wall and two side walls), and the opening is downward. semi-sealed space structure. The polygonal cylindrical structure adopts flat steel plate, which significantly reduces the processing difficulty compared with the ordinary cylindrical foundation using arc-shaped steel plate; and because the force of the wind turbine may come from multiple directions, the regular polygonal polygonal cylindrical structure is more conducive to the structure Force.

The upper surface of the top cover 3 is welded and fixed with a main beam 1 and a secondary beam 2 . The main beam 1 and the secondary beam 2 are mainly to effectively transfer the upper load transmitted by the truss structure to the top cover 3 and the cylinder wall 4 . The main beam 1 is arranged on the upper part of the top cover 3 corresponding to each inner wall, outer wall and side wall of the cylinder wall 4; it can be seen that the main beam 1 divides a plurality of partition blocks on the upper surface of the top cover 3, and each partition block is provided with 2 to 6 secondary beams 2, 2 to 6 secondary beams 2 are evenly arranged in the circumferential direction and radial direction in each partition block, and the secondary beams 2 and the main beam 1 are connected by welding.

The truss structure consists of a transition section 5, 3-8 supporting steel pipes 6, and connecting steel pipes 7, which can effectively transmit force between the upper wind turbine and the lower polygonal cylindrical structure.

The transition section 5 is arranged above the polygonal cylindrical structure along the vertical symmetrical center line of the polygonal cylindrical structure. 3-8 supporting steel pipes 6 are evenly distributed in a ring with the transition section 5 as the center, 3-8 supporting steel pipes 6 are arranged inclined from bottom to top from outside to inside, and the center line of a single support steel pipe 6 and the center line of the transition section 5 are located are on the same plane, and the angle between the centerline of the single supporting steel pipe 6 and the centerline of the transition section 5 is 5-25 degrees. The bottom end of each supporting steel pipe 6 is welded and fixed to the junction of adjacent main beams 1 inside the polygonal cylindrical structure, and the main beam 1 inside the polygonal cylindrical structure is set on the top cover 3 at the position above the inner wall of the cylinder wall 4 The main beam 1. The upper part of each supporting steel pipe 6 and the transition section 5 are fixed by welding the upper and lower connecting steel pipes 7, and the upper and lower connecting steel pipes 7 are all set horizontally; generally, the elevation angle of each connecting steel pipe 7 is between 0 and 25 within the range.

The lower polygonal cylindrical structure and the upper truss structure form a stable overall structure through the connection of the main beam 1 and the supporting steel pipe 6. In this way, the huge bending moment transmitted by the wind turbine is passed through the truss structure and the main beam 1 and the secondary beam 2. The setting is converted into a smaller top cover 3 pressure and a smaller cylinder wall 4 side friction, so that the material properties can be fully utilized.

The installation method of the above-mentioned polygonal offshore wind turbine foundation is carried out in accordance with the following steps:

(1) Firstly manufacture the polygonal offshore wind turbine foundation in the factory;

(2) Tow the polygonal offshore wind turbine foundation as a whole to the designated installation site by self-floating;

(3) sinking by pumping negative pressure, sinking the polygonal cylindrical structure into the seabed, so that the top cover is in close contact with the seabed;

(4) The polygonal offshore wind turbine foundation has been installed, and the wind turbines can be installed later.

Example 2

As shown in Figures 1 and 2, this embodiment discloses a polygonal offshore wind turbine foundation, which consists of a lower polygonal cylindrical structure and an upper truss structure, and the whole is a steel structure.

The polygonal cylindrical structure of this embodiment consists of a main beam 1, a secondary beam 2, a top cover 3 and a cylindrical wall 4. The regular hexagonal cylindrical structure has an outer side length of 18500 mm and an inner side length of 11000 mm. The barrel wall 4 includes the same six inner walls, the same six outer walls and the same six side walls. The six inner walls and the six outer walls respectively form a hexagonal structure, and the six outer walls are arranged parallel to the six inner walls on the outside thereof, and a piece of welding is welded between the connecting lines of the adjacent inner walls and the corresponding connecting lines of the adjacent outer walls. side wall. A top cover 3 with a regular hexagonal inner edge and a regular hexagonal outer edge is arranged on the tube wall 4 , and the inner edge and the outer edge of the top cover 3 are welded to the top end of the inner wall and the top end of the outer wall of the tube wall 4 respectively. Thus, the polygonal cylindrical structure includes six compartments, each of which is trapezoidal in cross-section surrounded by the top cover 3 and four cylinder walls 4 (one inner wall, one outer wall, and two side walls), with the opening facing downwards. The semi-sealed space structure, the thickness of the cylinder wall is 25mm, the height is 6000m, and the thickness of the top cover 3 is 25mm. The upper surface of the top cover 3 is provided with a main beam 1 and a secondary beam 2. The main beam 1 is a composite beam with a beam height of 800 mm, a flange plate width of 2000 mm, a thickness of 45 mm, and a web thickness of 30 mm. The secondary beam is made of I40a I-beam. The main beam 1 is arranged on the upper part of the top cover 3 corresponding to each inner wall, outer wall and side wall of the cylinder wall 4. It can be seen that the main beam 1 divides a plurality of partition blocks on the upper surface of the top cover 3, and each partition block is provided with Five secondary beams 2, wherein three secondary beams 2 are uniformly arranged radially in each partition block, and two secondary beams 2 are uniformly arranged circumferentially in each partition block. The main beam 1, the secondary beam 2 and the top cover 3 are connected by welding.

The truss structure consists of a transition section 5, six supporting steel pipes 6, and twelve connecting steel pipes 7. The transition section 5 is a steel pipe with a diameter of 5000mm, a wall thickness of 80mm, and a height of 6000mm. The transition section 5 is arranged above the polygonal cylindrical structure along the vertical symmetrical center line of the polygonal cylindrical structure. The six supporting steel pipes 6 are evenly distributed in a ring with the transition section 5 as the center, and are arranged obliquely from bottom to top and from outside to inside. The supporting steel pipe 6 has a diameter of 2000mm, a wall thickness of 45mm, and a length of 8000mm. The centerline of the single supporting steel pipe 6 and the centerline of the transition section 5 are on the same plane, and the angle between the centerline of the single supporting steel pipe 6 and the centerline of the transition section 5 is 10 degrees. The bottom end of each supporting steel pipe 6 is welded and fixed to the junction of adjacent main beams 1 inside the polygonal cylindrical structure, and the main beam 1 inside the polygonal cylindrical structure is set on the top cover 3 at the position above the inner wall of the cylinder wall 4 The main beam 1. The upper part of each supporting steel pipe 6 and the transition section 5 are fixed by welding the upper and lower connecting steel pipes 7 arranged horizontally. The diameter of the connecting steel pipes 7 is 1500mm, the wall thickness is 45mm, and the length is set according to the welding position requirements.

Although the preferred embodiment of the utility model has been described above in conjunction with the accompanying drawings, the utility model is not limited to the above-mentioned specific implementation, and the above-mentioned specific implementation is only illustrative and not restrictive. Under the enlightenment of the utility model, those of ordinary skill can also make many specific transformations without departing from the spirit of the invention and the protection scope of the claims, and these all belong to the protection scope of the utility model.

Claims (8)

1. A polygonal offshore wind turbine foundation, characterized in that it is composed of a polygonal cylindrical structure at the bottom and a truss structure at the top; The polygonal cylindrical structure is a semi-sealed structure with a bottom opening formed by a cylinder wall and a top cover. The outer walls of the block are respectively surrounded by a polygonal structure, and the outer walls of the plurality of blocks are correspondingly arranged in parallel on the outer sides of the inner walls of the plurality of blocks, and the connecting lines of the adjacent inner walls are connected with the corresponding connecting lines of the adjacent outer walls. There are side walls; the top cover with polygonal inner and outer edges is arranged on the cylinder wall, and the inner and outer edges of the top cover are respectively connected to the top of the inner wall and the top of the outer wall; The upper surface of the top cover is provided with a main beam and a secondary beam, and the main beam is arranged on the upper part of the top cover corresponding to each of the inner wall, the outer wall and the side wall of the cylinder wall, and the top A plurality of secondary beams uniformly arranged in the circumferential direction and radial direction are arranged in each partition block divided by the main beam on the top of the cover; The truss structure includes a transition section arranged above the polygonal cylindrical structure along the vertical centerline of the polygonal cylindrical structure, and a plurality of trusses are uniformly arranged in a ring around the transition section from bottom to top and from outside to inside. Inclined supporting steel pipes, the bottom end of each supporting steel pipe is fixed at the junction of adjacent main beams inside the polygonal cylindrical structure, the upper part of each supporting steel pipe and the transition section pass through the upper and lower Two connecting steel pipes are connected and fixed. 2 . The polygonal offshore wind power cylinder foundation according to claim 1 , wherein the number of the inner wall, the outer wall and the side wall in the cylinder wall is the same, all of which are 3-8 pieces. 3. A polygonal offshore wind turbine foundation according to claim 1, characterized in that the number of sides of the inner and outer edges of the top cover is the same as that of the inner wall, the outer wall or the outer wall of the cylinder wall. The number of sides of the side walls is the same, being 3-8 pieces. 4. A polygonal offshore wind turbine foundation according to claim 1, characterized in that the number of the main girders is the sum of the numbers of the inner wall, the outer wall and the side wall in the tube wall . 5. A polygonal offshore wind turbine foundation according to claim 1, characterized in that, the top of the top cover is divided by the main girder and each partition block is provided with circular and radial evenly arranged The number of the secondary beams is 2 to 6 respectively. 6 . The polygonal offshore wind turbine foundation according to claim 1 , wherein the number of the supporting steel pipes is the same as that of the inner wall of the cylinder wall, and both are 3-8. 7 . 7. A polygonal offshore wind turbine foundation according to claim 1, characterized in that the centerline of the single supporting steel pipe and the centerline of the transition section are located on the same plane, and the single supporting steel pipe The angle between the centerline of the center line and the center line of the transition section is 5-25 degrees. 8 . The polygonal offshore wind turbine foundation according to claim 1 , wherein the elevation angle of each connecting steel pipe is 0-25 degrees.