Wind power tower foundation

Abstract

The utility model provides a wind power generation tower drum foundation. The wind power generation tower drum foundation includes the body, the body includes the first cylinder, second cylinder and third cylinder from bottom to top are connected in proper order, the first cylinder and third cylinder are all cylindrical, the diameter of first cylinder is greater than the diameter of third cylinder, second cylinder is circular truncated cone, first inner chamber of cylindrical is equipped in first cylinder and second cylinder, second inner chamber of cylindrical is equipped in third cylinder, the diameter of first inner chamber is greater than the diameter of second inner chamber, first inner chamber is linked with second inner chamber, the upper end of second inner chamber is formed through the mouth with the through -going hole of third cylinder, the first baffle is equipped with at the through -going hole, the outside of through -going hole forms the mounting surface. The utility model reduces weight compared with traditional cylindrical foundation, and bending moment bearing capacity is promoted, can improve the foundation anti -overturning moment.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation equipment technology, and in particular to a wind power generation tower foundation. Background Technology

[0002] Existing concrete foundations are mostly solid structures. With the increasing size of wind turbines, these solid cast-in-place concrete foundations have led to problems such as long construction cycles and difficulty in controlling temperature cracks. If prefabricated foundations are to be used instead, although the construction period can be shortened, there are defects such as uneven radial stiffness, stress concentration at joints and differential settlement, and poor adaptability. Especially in mountainous wind farms, the risk of overturning of prefabricated foundations is significant. Utility Model Content

[0003] The purpose of this invention is to provide a wind power generation tower foundation that can reduce weight and improve the foundation's bending moment bearing capacity.

[0004] The technical solution of this utility model is: a wind power generation tower foundation, including a body, the body including a first column, a second column and a third column connected sequentially from bottom to top, the first column and the third column are both cylinders, the diameter of the first column is larger than the diameter of the third column, and the second column is a frustum conical; the first column and the second column are provided with a cylindrical first inner cavity, the third column is provided with a cylindrical second inner cavity, the diameter of the first inner cavity is larger than the diameter of the second inner cavity, the first inner cavity and the second inner cavity communicate with each other, the second inner cavity penetrates through the upper end of the third column to form a through opening, the through opening is covered with a first cover plate; the outer side of the through opening forms an mounting surface.

[0005] Preferably, the mounting surface is provided with an annular alignment groove.

[0006] Preferably, the mounting surface is provided with multiple prestressing systems in a circular pattern, and the prestressing systems are located between the alignment groove and the first cover plate.

[0007] Preferably, a ladder is provided in the first inner cavity and the second inner cavity, a ladder hole is provided on the first cover plate, the lower end of the ladder is supported on the inner bottom surface of the first column, the upper end of the ladder extends out from the ladder hole, and the ladder is connected to the inner wall of the second inner cavity.

[0008] Preferably, the ladder includes a first connector, vertical beams, steps, and a second connector. Two vertical beams are spaced apart, and each vertical beam is connected to the inner wall of the second inner cavity through at least one set of the first connectors. Multiple steps connect the two vertical beams, and the vertical beams are connected to the first connectors through the second connectors.

[0009] Preferably, the first connecting member includes a support member, an expansion bolt, and a pre-embedded sleeve. The expansion bolt is disposed in the inner wall of the third column, and the pre-embedded sleeve is connected to the side of the expansion bolt adjacent to the second inner cavity. The support member is located in the second inner cavity, one end of the support member is connected to the pre-embedded sleeve, and the other end of the support member is connected to the vertical beam.

[0010] Preferably, the support member is L-shaped, and two support members form a U-shape. One side of the L-shape is connected to the pre-embedded sleeve, and the other side of the L-shape is connected to the vertical beam.

[0011] Preferably, the second connector includes a self-locking nut, a cap nut, and a double-ended bolt. The double-ended bolt passes through the step, the vertical beam, and the first connector. Both ends of the double-ended bolt are fixed to the first connector by the self-locking nut and the cap nut, respectively.

[0012] Preferably, the ladder is connected to the mounting surface by a diagonal brace.

[0013] Preferably, the wind power tower foundation further includes a second cover plate, which is installed over the ladder hole, avoiding the position of the ladder hole; a handle is provided on the upper surface of the second cover plate.

[0014] Compared with related technologies, the beneficial effects of this utility model are as follows: I. This utility model, by designing a cylindrical first column, a truncated cone second column, and a cylindrical third column, and setting first and second inner cavities of different diameters inside them, reduces the weight of the foundation compared to the traditional cylindrical foundation, while increasing the bending moment bearing capacity and improving the foundation's anti-overturning moment. Second, this utility model is equipped with a prestressing system, which can be anchored to the assembled tower, thus adapting to the effective fixing of the assembled tower. Third, the large cross-section first column of this utility model matches the bending moment zone, and the small cross-section third column at the top adapts to the low stress zone, balancing the radial stiffness and making the structure safer and more stable. Fourth, the foundation of this utility model adopts a cavity structure, which reduces the amount of concrete used, avoids the stress concentration problem of the grouting port of the traditional foundation, and reduces the problems of temperature cracks, insufficient strength, and durability deterioration caused by improper curing of large volume concrete. Attached Figure Description

[0015] Figure 1 A three-dimensional schematic diagram of the wind power generation tower foundation provided by this utility model; Figure 2 A cross-sectional schematic diagram of the wind power generation tower foundation and part of the tower provided for this utility model; Figure 3 Side view of the ladder installation; Figure 4 Top view of the ladder installation; Figure 5 This is a schematic diagram showing the placement of the second cover plate on the ladder hole; Figure 6 This is a schematic diagram of the installation of the prestressed system.

[0016] In the attached diagram: 1. Body; 11. First column; 12. Second column; 13. Third column; 14. First inner cavity; 15. Second inner cavity; 16. Mounting surface; 2. First cover plate; 21. Ladder hole; 3. Alignment groove; 4. Ladder; 41. Support component; 42. Step; 43. Vertical beam; 44. Self-locking nut; 45. Cap nut; 46. Double-ended bolt; 47. Expansion bolt; 48. Embedded sleeve; 49. Diagonal brace; 410. First connector; 411. Second connector; 5. Prestressed system; 51. Steel strand; 52. Prestressed duct; 6. Second cover plate; 61. Handle. Detailed Implementation

[0017] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0018] like Figure 1 , Figure 2 As shown, the wind power tower foundation provided in this embodiment includes a body 1, a first cover plate 2, an alignment groove 3, a ladder 4, a prestressed system 5, and a second cover plate 6.

[0019] The main body 1 includes a first column 11, a second column 12, and a third column 13 connected sequentially from bottom to top. Both the first column 11 and the third column 13 are cylinders, with the diameter of the first column 11 being larger than the diameter of the third column 13. The second column 12 is a frustum of a cone. The main body 1 is formed by cast-in-place concrete, and a cylindrical first inner cavity 14 is formed within the first column 11 and the second column 12 during concrete pouring using a formwork. A cylindrical second inner cavity 15 is provided within the third column 13. The diameter of the first inner cavity 14 is larger than the diameter of the second inner cavity 15, and the first inner cavity 14 communicates with the second inner cavity 15. The second inner cavity 15 penetrates the upper end of the third column 13 to form a through-hole, which is covered by a first cover plate 2. The bottom elevation of the first cover plate 2 is adjusted according to its thickness to ensure that the top elevation of the first cover plate 2 is consistent with the top elevation of the third column 13. An mounting surface 16 is formed on the outer side of the through-hole.

[0020] The mounting surface 16 is provided with an annular alignment groove 3. The alignment groove 3 is used to grout the tower cylinder to the foundation after the tower cylinder is embedded.

[0021] Multiple prestressing systems 5 are arranged circumferentially on the mounting surface 16, and the prestressing systems 5 are located between the alignment groove 3 and the first cover plate 2. Figure 6 As shown, the prestressed system 5 includes steel strands 51 and prestressed ducts 52. The third column 13 has vertically penetrating prestressed ducts 52. The lower end of the steel strand 51 passes through the prestressed duct 52 and is anchored by an anchor (not labeled). The upper end of the steel strand 51 passes through the tower and is anchored to the steel transition layer (not shown). Anchoring both ends of the steel strand 51 improves the tower's resistance to overturning.

[0022] like Figure 2 As shown, the conical surface of the second column 12 needs to be covered with geotextile (unlabeled), and then a soil layer is covered on the geotextile. The exterior of the third column 13 is sealed with lime-soil (unlabeled).

[0023] like Figure 3 , Figure 4 As shown, a ladder 4 is provided in the first inner cavity 14 and the second inner cavity 15. A ladder hole 21 is provided on the first cover plate 2. The lower end of the ladder 4 is supported on the inner bottom surface of the first column 11. The upper end of the ladder 4 extends out from the ladder hole 21. The ladder 4 is connected to the inner wall of the second inner cavity 15.

[0024] The ladder 4 includes a first connector 410, vertical beams 43, steps 42, a second connector 411, and diagonal braces 49. Two vertical beams 43 are spaced apart, and each vertical beam 43 is connected to the inner wall of the second inner cavity 15 via two sets of the first connectors 410. Multiple steps 42 (which can be welded or installed with fasteners) connect the two vertical beams 43, and the vertical beams 43 are connected to the first connectors 410 via the second connectors 411.

[0025] The first connecting member 410 includes a support member 41, an expansion bolt 47, and a pre-embedded sleeve 48. The expansion bolt 47 is disposed in the inner wall of the third column 13, and the pre-embedded sleeve 48 is connected to the side of the expansion bolt 47 adjacent to the second inner cavity 15. The support member 41 is located in the second inner cavity 15, with one end connected to the pre-embedded sleeve 48 and the other end connected to the vertical beam 43. The support member 41 is L-shaped, and two support members 41 form a U-shape. One side of the L-shape is connected to the pre-embedded sleeve 48, and the other side of the L-shape is connected to the vertical beam 43.

[0026] The second connecting member 411 includes a self-locking nut 44, a cap nut 45, and a double-ended bolt 46. The double-ended bolt 46 passes through the step 42, the vertical beam 43, and the first connecting member 410. The two ends of the double-ended bolt 46 are fixed to the support member 41 by the self-locking nut 44 and the cap nut 45, respectively. A diagonal brace 49 connects the ladder 4 to the mounting surface 16.

[0027] like Figure 6 As shown, the second cover plate 6 is positioned over the ladder hole 21, avoiding its location; a handle 61 is provided on the upper surface of the second cover plate 6. The second cover plate 6 can be opened via the handle 61, facilitating routine maintenance and repairs by opening the cover and entering the foundation.

[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A wind power generation tower foundation, characterized in that, The system includes a body (1), which comprises a first column (11), a second column (12), and a third column (13) connected sequentially from bottom to top. The first column (11) and the third column (13) are both cylinders. The diameter of the first column (11) is larger than the diameter of the third column (13). The second column (12) is a frustum conical. The first column (11) and the second column (12) are provided with a cylindrical first inner cavity (14). The third column (13) is provided with a cylindrical second inner cavity (15). The diameter of the first inner cavity (14) is larger than the diameter of the second inner cavity (15). The first inner cavity (14) communicates with the second inner cavity (15). The second inner cavity (15) penetrates the upper end of the third column (13) to form a through opening. A first cover plate (2) is provided at the through opening. An mounting surface (16) is formed on the outer side of the through opening.

2. The wind power generation tower foundation according to claim 1, characterized in that, The mounting surface (16) is provided with an annular alignment groove (3).

3. The wind power generation tower foundation according to claim 2, characterized in that, Multiple prestressing systems (5) are arranged in a circular pattern on the mounting surface (16), and the prestressing system (5) is located between the alignment groove (3) and the first cover plate (2).

4. The wind power generation tower foundation according to claim 1, characterized in that, A ladder (4) is provided in the first inner cavity (14) and the second inner cavity (15). A ladder hole (21) is provided on the first cover plate (2). The lower end of the ladder (4) is supported on the inner bottom surface of the first column (11). The upper end of the ladder (4) extends out from the ladder hole (21). The ladder (4) is connected to the inner wall of the second inner cavity (15).

5. The wind power generation tower foundation according to claim 4, characterized in that, The ladder (4) includes a first connector (410), vertical beams (43), steps (42), and a second connector (411). There are two vertical beams (43) spaced apart. Each vertical beam (43) is connected to the inner wall of the second inner cavity (15) through at least one set of the first connectors (410). Multiple steps (42) are connected between the two vertical beams (43). The vertical beams (43) are connected to the first connectors (410) through the second connectors (411).

6. The wind power generation tower foundation according to claim 5, characterized in that, The first connector (410) includes a support (41), an expansion bolt (47), and a pre-embedded sleeve (48). The expansion bolt (47) is located in the inner wall of the third column (13). The expansion bolt (47) is connected to the pre-embedded sleeve (48) on the side of the second inner cavity (15). The support (41) is located in the second inner cavity (15). One end of the support (41) is connected to the pre-embedded sleeve (48), and the other end of the support (41) is connected to the vertical beam (43).

7. The wind power generation tower foundation according to claim 6, characterized in that, The support member (41) is L-shaped, and two support members (41) form a U-shape. One side of the L-shape is connected to the pre-embedded sleeve (48), and the other side of the L-shape is connected to the vertical beam (43).

8. The wind power generation tower foundation according to claim 5, characterized in that, The second connector (411) includes a self-locking nut (44), a cap nut (45), and a double-ended bolt (46). The double-ended bolt (46) passes through the step (42), the vertical beam (43), and the first connector (410). The two ends of the double-ended bolt (46) are fixed to the first connector (410) by the self-locking nut (44) and the cap nut (45), respectively.

9. The wind power generation tower foundation according to claim 4, characterized in that, The ladder (4) is connected to the mounting surface (16) by a diagonal brace (49).

10. The wind power generation tower foundation according to claim 4, characterized in that, It also includes a second cover plate (6), which is placed over the ladder hole (21) in a position that avoids the ladder hole (21); a handle (61) is provided on the upper surface of the second cover plate (6).

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