Three-column support-conical shell-box arch switching section suitable for wind power tower

Abstract

The three-column bearing-conical shell-box arch switching section comprises a top flange plate, three circular steel pipe supporting stand columns and three box arches, a special-shaped ring beam is installed on the edge of the top flange plate, a multi-cavity conical shell oblique beam is installed on the upper surface of each box arch, and a plurality of circular steel pipe supporting stand columns are installed on the top flange plate. A large number of stiffening rib structures are adopted, the overall rigidity of the whole transfer structure is improved in a criss-cross reinforcing mode, meanwhile, a smooth structure of a multi-cavity conical shell oblique beam is adopted, the overall rigidity of the transfer structure is improved, and the overall rigidity of the transfer structure is improved. The pressure of the steel tower structure on the upper portion can be transmitted downwards through a reasonable mechanical transmission path, due to the fact that the supporting structure on the lower portion adopts a tripod type supporting mode, materials can be greatly saved, the same supporting effect is achieved through a small number of steel bars and concrete, and a better supporting effect is provided through mechanical transmission.

Description

Technical Field

[0001] The invention relates to the field of wind power generation, in particular to a three-column support-cone shell-box arch transition section suitable for a wind power tower. Background Art

[0002] With the increasing global demand for renewable energy and the national "dual carbon" goals, wind power generation, as a clean and renewable energy source, has developed rapidly. In recent years, wind power generation technology has made significant progress, and the scale of wind turbines has been continuously expanded to improve energy efficiency and reduce power generation costs. Hybrid wind turbines are usually composed of main components such as wind rotors, nacelle transmission systems, towers, towers, and transition sections. The tower directly supports the wind rotor and nacelle to ensure their normal operation; the upper tower and the lower tower are connected through the transition section, which must have good strength and stiffness at the same time to ensure smooth force transmission and deformation control.

[0003] At present, my country's wind power installed capacity ranks first in the world. Wind power construction in low wind speed areas in the central and eastern regions can make fuller use of local wind energy. In order to capture more wind energy in low wind speed areas, wind turbines are getting bigger and bigger, and the height of wind power towers is also increasing.

[0004] The styles of wind turbine towers have also evolved from traditional tapered steel tube towers and truss towers to hybrid towers (steel-hybrid towers, steel tower barrel-lattice hybrid towers) and other forms. The development of hybrid towers is well suited to the demand for increased wind turbine tower heights. While meeting economic requirements, it can support higher-power wind turbines and obtain greater wind energy. The transition section of the steel tower barrel-lattice hybrid tower receives the conical tower at the top and transfers to the lattice section tower column at the bottom, which plays an extremely critical role.

[0005] The existing transfer segment technology currently has the following main problems: The traditional construction of transition sections requires grouting of large amounts of concrete, which poses considerable challenges to the construction difficulty and schedule requirements of ultra-high wind turbine towers.

[0006] The material cost is high, the production process is complicated, and large-scale transportation is inconvenient.

[0007] The force transmission of the transition section structure is not clear, concise, and smooth enough. Sometimes excessive turns can easily form stress concentration areas, or the component processing is extremely difficult.

[0008] To this end, we propose a three-column support-conical shell-box arch transition section suitable for wind power towers to solve the above problems. Summary of the invention

[0009] The purpose of the present invention is to provide a three-column support-conical shell-box arch transition section suitable for a wind power tower to solve the problems raised in the above-mentioned background technology. The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology.

[0010] To achieve the above object, the present invention provides the following technical solutions: A three-column support-cone shell-box arch transition section suitable for a wind power tower comprises a top flange, three round steel tube support columns and three box arches, wherein a special-shaped ring beam is installed at the edge of the top flange, a multi-cavity cone shell inclined beam is installed on the upper surface of the box arch, both ends of the box arch are connected to the support columns, an outer triangular horizontal connecting beam is arranged between two of the support columns, a multi-cavity cone shell inclined beam is installed on the top of the box arch, an inner triangular horizontal connecting beam is connected between the two outer triangular horizontal connecting beams, a square column is connected to the upper surface of the inner triangular horizontal connecting beam, a connecting short beam is connected between the round steel tube support column and the inner triangular horizontal connecting beam, a connecting beam stiffening rib is arranged inside the inner triangular horizontal connecting beam, and an outer triangular stiffening rib is arranged inside the outer triangular horizontal connecting beam.

[0011] In a further embodiment, the lower surface of the special-shaped ring beam is connected with annular stiffening ribs, radial stiffening ribs and vertical stiffening ribs.

[0012] In a further embodiment, the multi-cavity conical shell oblique beam includes an oblique beam upper flange, an oblique beam lower flange and an oblique beam middle web.

[0013] In a further embodiment, the box-type arch includes a box-type stiffening rib, an arch outer side plate, an arch inner side plate and an arch lower side plate.

[0014] In a further embodiment, the round steel tube support column includes a round steel tube and annular stiffening ribs.

[0015] In a further embodiment, a correction ring is provided at the center of the three outer triangular horizontal connecting beams, and the correction ring includes a support ring, and hydraulic cylinders are arranged in a ring on the surface of the support ring.

[0016] In a further embodiment, a liquid pipe is provided between two hydraulic cylinders which are centrally symmetrically distributed about the center of the deviation correction ring.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention adopts a large number of stiffening rib structures, which improve the overall stiffness of the entire transition structure through a criss-cross reinforcement method. At the same time, it adopts a smooth structure of a multi-cavity conical shell inclined beam, which can allow the pressure of the upper steel tower structure to be transmitted downward in a reasonable mechanical transfer path. Since the supporting structure below the present application adopts a tripod-type support method, it can greatly save materials, and the same supporting effect can be achieved with a small amount of steel bars and concrete, and the mechanical transfer of the present application provides a better supporting effect.

[0018] The present invention also adopts a deviation correction structure, which reduces the deviation problem caused by the upper steel tower being blown by the wind, improves the stability of the steel tower structure, and especially improves the stability between the steel tower and the transition structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the transition structure and steel tower of the three-column support-conical shell-box arch transition section suitable for wind power towers.

[0020] Figure 2 It is a schematic diagram of the main structure of a three-column support-conical shell-box arch transition section suitable for a wind power tower.

[0021] Figure 3 The diagram is a structural diagram of the inner triangular horizontal connecting beam and the connecting short beam in the three-column support-conical shell-box arch transition section suitable for wind power towers.

[0022] Figure 4 The diagram is a structural diagram of a deviation-correcting ring in a three-column support-conical shell-box arch transition section suitable for a wind power tower.

[0023] Figure 5 It is a schematic diagram of the hydraulic cylinder structure in the three-column support-conical shell-box arch transition section suitable for wind power towers.

[0024] Figure 6 It is a schematic diagram of the side section structure of a three-column support-conical shell-box arch transition section suitable for a wind power tower.

[0025] Figure 7 The schematic diagram is a radial stiffening rib structure in a three-column support-conical shell-box arch transition section suitable for wind power towers.

[0026] Figure 8 It is a schematic diagram of the cross-sectional structure of a three-column support-conical shell-box arch transition section suitable for a wind power tower.

[0027] Fig. 9 It is a schematic diagram of the outer surface stress cloud diagram structure of the transition section model in the three-column support-conical shell-box arch transition section suitable for wind power towers under the coupling of compression, bending, shear and torsion.

[0028] Fig.10It is a schematic diagram of the inner surface stress cloud diagram structure of the transition section model in the three-column support-conical shell-box arch transition section suitable for wind power towers under the coupling of compression, bending, shear and torsion.

[0029] In the figure: 1. top flange; 2. special-shaped ring beam; 21. annular stiffening ribs; 22. radial stiffening ribs; 23. vertical stiffening ribs; 3. multi-cavity cone shell inclined beam; 31. upper flange of inclined beam; 32. lower flange of inclined beam; 33. middle web of inclined beam; 4. box arch; 41. box stiffening ribs; 42. outer plate of arch; 43. inner plate of arch; 44. lower plate of arch; 5. round steel pipe supporting column; 51. round steel pipe; 52. annular stiffening ribs; 6. outer triangular horizontal connecting beam; 61. outer triangular stiffening ribs; 7. inner triangular horizontal connecting beam; 71. connecting beam stiffening ribs; 8. connecting short beam; 9. square column; 10. bottom flange; 11. correction ring; 1101. support ring; 1102. hydraulic cylinder; 1103. liquid pipe. DETAILED DESCRIPTION

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1: Please refer to Figure 1-10 In an embodiment of the present invention, a three-column support-cone shell-box arch transition section suitable for a wind power tower comprises a top flange 1, three round steel tube support columns 5 and three box arches 4, wherein a special-shaped ring beam 2 is installed at the edge of the top flange 1, a multi-cavity cone shell inclined beam 3 is installed on the upper surface of the box arch 4, both ends of the box arch 4 are connected to the support columns 5, an outer triangular horizontal connecting beam 6 is arranged between the two support columns 5, a multi-cavity cone shell inclined beam 3 is installed on the top of the box arch 4, an inner triangular horizontal connecting beam 7 is connected between the two outer triangular horizontal connecting beams 6, a square column 9 is connected to the upper surface of the inner triangular horizontal connecting beam 7, a connecting short beam 8 is connected between the round steel tube support column 5 and the inner triangular horizontal connecting beam 7, a connecting beam stiffening rib 71 is arranged inside the inner triangular horizontal connecting beam 7, and an outer triangular stiffening rib 61 is arranged inside the outer triangular horizontal connecting beam 6.

[0034] The lower surface of the special-shaped ring beam 2 is connected with annular stiffening ribs 21, radial stiffening ribs 22 and vertical stiffening ribs 23. The annular stiffening ribs 21, radial stiffening ribs 22 and vertical stiffening ribs 23 have a good supporting effect on the lower surface of the special-shaped ring beam 2, thereby improving the stiffness of the special-shaped ring beam 2 and the overall stiffness.

[0035] The multi-cavity conical shell oblique beam 3 includes an upper flange 31 of the oblique beam, a lower flange 32 of the oblique beam and an intermediate web 33 of the oblique beam. The upper flange 31 of the oblique beam and the special-shaped ring beam 2 have the same thickness and spatial curvature, while the lower flange 32 of the oblique beam and the annular stiffening rib 21 have the same thickness and spatial curvature, thereby ensuring the smoothness of the force transmission path.

[0036] The box-shaped arch 4 includes a box-shaped stiffening rib 41 , an arch outer side plate 42 , an arch inner side plate 43 and an arch lower side plate 44 .

[0037] The round steel pipe supporting column 5 includes a round steel pipe 51 and annular stiffening ribs 52 .

[0038] Example 2: Please refer to Figure 1-10, which is different from Example 1, is that a correcting ring 11 is arranged at the center of the three outer triangular horizontal connecting beams 6, and the correcting ring 11 includes a support ring 1101, and hydraulic cylinders 1102 are arranged in a ring on the surface of the support ring 1101. The correcting ring 11 is in contact with the extension section of the bottom of the steel tower above, and the hydraulic cylinder 1102 is used to push the extension section of the bottom of the steel tower in the opposite direction after the deviation, thereby achieving a correcting effect.

[0039] A liquid pipe 1103 is arranged between the two hydraulic cylinders 1102 which are symmetrically distributed at the center of the correction ring 11. The piston of the hydraulic cylinder 1102 divides the space into two layers, the space close to one end of the push rod is called the upper space, and the other space is called the lower space. The upper space is connected to the lower space of the other hydraulic cylinder 1102 through the liquid pipe 1103. When the extension end of the bottom of the steel tower tilts to one side, the push rod on the hydraulic cylinder 1102 on the corresponding side will be squeezed, so that the hydraulic oil in the lower space of this side will be squeezed, while the upper space on the other end will be squeezed, so that the hydraulic oil can cross the liquid pipe 1103 and be input into the squeezed lower space, thereby exerting a reverse top pressure effect on the extension end of the steel tower. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A three-column support-cone shell-box arch transition section suitable for a wind power tower, characterized in that: The invention comprises a top flange (1), three round steel tube support columns (5) and three box-type arches (4), wherein a special-shaped ring beam (2) is installed on the edge of the top flange (1), a multi-cavity cone shell inclined beam (3) is installed on the upper surface of the box-type arch (4), two ends of the box-type arch (4) are connected to the support columns (5), an outer triangular horizontal connecting beam (6) is arranged between two of the support columns (5), a multi-cavity cone shell inclined beam (3) is installed on the top of the box-type arch (4), an inner triangular horizontal connecting beam (7) is connected between the two outer triangular horizontal connecting beams (6), a square column (9) is connected to the upper surface of the inner triangular horizontal connecting beam (7), a connecting short beam (8) is connected between the round steel tube support column (5) and the inner triangular horizontal connecting beam (7), a connecting beam stiffening rib (71) is arranged inside the inner triangular horizontal connecting beam (7), and an outer triangular stiffening rib (61) is arranged inside the outer triangular horizontal connecting beam (6).

2. The three-column support-cone shell-box arch transition section suitable for a wind power tower according to claim 1, characterized in that: The lower surface of the special-shaped ring beam (2) is connected with annular stiffening ribs (21), radial stiffening ribs (22) and vertical stiffening ribs (23).

3. The three-column support-cone shell-box arch transition section suitable for a wind power tower according to claim 1, characterized in that: The multi-cavity conical shell oblique beam (3) comprises an oblique beam upper flange (31), an oblique beam lower flange (32) and an oblique beam middle web (33).

4. The three-column support-cone shell-box arch transition section suitable for a wind power tower according to claim 1, characterized in that: The box-shaped arch (4) comprises a box-shaped stiffening rib (41), an arch outer side plate (42), an arch inner side plate (43) and an arch lower side plate (44).

5. The three-column support-cone shell-box arch transition section suitable for wind power tower according to claim 1, characterized in that: The round steel tube support column (5) comprises a round steel tube (51) and annular stiffening ribs (52).

6. The three-column support-cone shell-box arch transition section suitable for a wind power tower according to claim 1, characterized in that: A deviation correction ring (11) is arranged at the centre of the three outer triangular horizontal connecting beams (6), and the deviation correction ring (11) comprises a support ring (1101), and hydraulic cylinders (1102) are arranged in a ring shape on the surface of the support ring (1101).

7. The three-column support-cone shell-box arch transition section suitable for a wind power tower according to claim 1, characterized in that: A liquid pipe (1103) is provided between two hydraulic cylinders (1102) that are symmetrically distributed about the center of the deviation correction ring (11).

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