Fan capacity expansion foundation platform

Abstract

The embodiment of the utility model discloses a fan capacity expansion foundation platform, and relates to the technical field of fan foundations. The method is invented for meeting the requirement for fan capacity expansion and ensuring safe and stable operation of wind power facilities. The fan capacity expansion foundation platform comprises a cantilever plate and a platform column which are sequentially arranged from bottom to top. The reinforcing structure comprises at least two arc-shaped steel plates, at least two I-shaped steel beams, a first anchor bolt and a second anchor bolt. Wherein the inner side wall of the arc-shaped steel plate is tightly attached to the side wall of the platform column and is connected with the platform column through the first anchor bolt, and the outer side wall of the arc-shaped steel plate is connected with the first end of the I-shaped steel beam; the I-shaped steel beam surrounds the stand, extends outwards from the outer side wall of the arc-shaped steel plate in the radial direction of the cantilever plate and is connected with the cantilever plate through the second anchor bolt, and the lower flange of the I-shaped steel beam is tightly attached to the slope face of the cantilever plate. The utility model is suitable for the scene of fan reconstruction and reinforcement of a wind power plant.

Description

Technical Field

[0001] The utility model relates to the technical field of fan foundations, and in particular to a fan expansion foundation platform. Background Art

[0002] In June 2023, the National Energy Administration issued the "Management Measures for the Renovation, Upgrading and Decommissioning of Wind Farms", which encourages wind farms with a capacity of less than 1.5MW and connected to the grid for more than 15 years to carry out renovation, upgrading and decommissioning. According to this measure, many old wind farms across the country are planning to renovate or expand their capacity. In the future, wind power upgrading and renovation will be an important direction for the development of wind power new energy.

[0003] At present, in the wind turbine expansion and renovation projects, the solutions proposed by major design institutes for the existing wind turbine foundations are basically to dismantle the original foundation and build a new foundation. This method has a long construction period and poor economic benefits. In addition, it is worth noting that the wind turbines that meet the renovation requirements often have significant differences from the original wind turbines in key parameters such as specifications and weight. Generally speaking, the new wind turbines have larger capacity and higher height, which makes the original wind turbine foundation unable to effectively bear the structural safety requirements of the new wind turbine units.

[0004] In view of this situation, we urgently need to explore new technical solutions for wind turbine foundation transformation and reinforcement to meet the needs of wind turbine capacity expansion and ensure the safe and stable operation of wind power facilities. Utility Model Content

[0005] In view of this, an embodiment of the utility model provides a basic platform for wind turbine capacity expansion, which is convenient for meeting the needs of wind turbine capacity expansion and ensuring the safe and stable operation of wind power facilities.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: the wind turbine expansion foundation platform includes a cantilever plate and a column arranged in sequence from bottom to top, and the reinforcement structure includes: at least two arc-shaped steel plates, at least two I-beams, a first anchor bolt and a second anchor bolt; wherein, the inner side wall of the arc-shaped steel plate is in close contact with the side wall of the column, and is connected to the column through the first anchor bolt, and its outer side wall is connected to the first end of the I-beam; the I-beam surrounds the column, extends outward from the outer side wall of the arc-shaped steel plate along the radial direction of the cantilever plate, and is connected to the cantilever plate through the second anchor bolt, and its lower flange is in close contact with the slope of the cantilever plate.

[0007] Optionally, the reinforcement structure further includes: a steel connecting beam and bolts; the steel connecting beam is arranged at the radial middle position of the cantilever plate, and connects two adjacent I-beams through the bolts.

[0008] Optionally, the at least two arc-shaped steel plates are arranged at equal angles on the side walls of the pillar, and the at least two I-beams are arranged at equal angles on the slope of the cantilever plate.

[0009] Optionally, the bottom of the arc-shaped steel plate is flush with the junction of the column and the cantilever plate.

[0010] Optionally, the bottom of the first end of the I-beam is flush with the bottom of the connection between the arc-shaped steel plate and the I-beam.

[0011] Optionally, the first anchor bolts are arranged on both sides of the arc-shaped steel plate.

[0012] Optionally, the second anchor bolts are arranged on both sides of the lower flange of the I-beam.

[0013] Optionally, the I-beam extends radially along the cantilever plate to the bottom of the slope of the cantilever plate.

[0014] Optionally, the reinforcement structure also includes: a rectangular steel plate and anchor rods; the I-beam is extended radially along the cantilever plate, exceeds the bottom of the slope of the cantilever plate, and then extends axially to the foundation surface, and is vertically connected to the rectangular steel plate at the position of the foundation surface, and the rectangular steel plate is fixed to the foundation by the anchor rods.

[0015] Optionally, the reinforcement structure also includes: steel-concrete piles; the I-beam is extended radially along the cantilever plate, exceeds the bottom of the slope of the cantilever plate, and then extends axially, and the steel-concrete piles are arranged at the foundation position corresponding to the axial extension.

[0016] The wind turbine expansion foundation platform provided by the embodiment of the utility model may include a cantilever plate and a platform column arranged in sequence from bottom to top, and the reinforcement structure may include at least two arc-shaped steel plates, at least two I-beams, a first anchor bolt and a second anchor bolt; wherein the inner side wall of the arc-shaped steel plate is in close contact with the side wall of the platform column, and the platform column is connected to the first anchor bolt, and its outer side wall is connected to the first end of the I-beam; the I-beam surrounds the platform column, extends outward from the outer side wall of the arc-shaped steel plate along the radial direction of the cantilever plate, and is connected to the cantilever plate through the second anchor bolt, and its lower flange is in close contact with the slope of the cantilever plate. In this way, the demand for wind turbine expansion can be met, and the safe and stable operation of wind power facilities can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a wind turbine expansion foundation platform according to an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the top view of the structure of the wind turbine expansion foundation platform according to one embodiment of the utility model;

[0020] Figure 3 This is a side structural diagram of a wind turbine expansion foundation platform according to an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of a wind turbine expansion foundation platform according to another embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of a wind turbine expansion foundation platform according to another embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram of a wind turbine expansion foundation platform according to another embodiment of the utility model;

[0024] Figure 7 The present invention is a flowchart of a construction method for a wind turbine expansion foundation platform according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0026] It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figures 1 to 3 As shown, Figure 1 This is a three-dimensional structural diagram of a wind turbine expansion foundation platform according to an embodiment of the utility model. Figure 2 This is a schematic diagram of the top view of the structure of the wind turbine expansion foundation platform according to an embodiment of the utility model. Figure 3This is a schematic diagram of the side structure of a wind turbine expansion foundation platform according to an embodiment of the utility model. The wind turbine expansion foundation platform in this embodiment includes a cantilever plate 1 and a column 2 arranged in sequence from bottom to top, and the reinforcement structure includes: at least two arc-shaped steel plates 3, at least two I-beams 4, a first anchor bolt 5 and a second anchor bolt 6; wherein, the inner side wall of the arc-shaped steel plate 3 is in close contact with the side wall of the column 2, and is connected to the column 2 through the first anchor bolt 5, and its outer side wall is connected to the first end of the I-beam 4; the I-beam 4 surrounds the column 2, extends outward from the outer side wall of the arc-shaped steel plate 3 along the radial direction of the cantilever plate 1, and is connected to the cantilever plate 1 through the second anchor bolt 6, and its lower flange is in close contact with the slope of the cantilever plate 1.

[0028] Specifically, the wind turbine expansion foundation platform further includes a foundation ring 7, and the arc-shaped steel plate can be connected to the I-beam by welding.

[0029] It is understandable that the original wind turbine foundation may include a cantilever plate, a pedestal and a foundation ring, and the original wind turbine foundation plus the newly added reinforcement structure may constitute a new wind turbine expansion foundation platform provided by the embodiment of the utility model. One of the arc-shaped steel plates and one of the I-beams may constitute a set of arc-shaped steel plate and I-beam assemblies, and the arc-shaped steel plate and the I-beam assemblies may be connected to the original wind turbine foundation by anchor bolts, thereby forming a whole with the original wind turbine foundation to form a new wind turbine expansion foundation platform, which may meet the needs of wind turbine expansion under the condition of limited land acquisition.

[0030] The reinforcement structure may include a plurality of arc-shaped steel plates, I-beams and anchor bolts. The arc-shaped steel plates and the I-beams may be welded to form an arc-shaped steel plate I-beam assembly, which may be anchored and connected to the columns and cantilever plates of the original wind turbine foundation through anchor bolts. The arc-shaped steel plate I-beam assembly is fixed to the original wind turbine foundation to form a whole, thereby improving the bearing capacity of the original wind turbine foundation and achieving the purpose of in-situ transformation and reinforcement of the wind turbine expansion foundation.

[0031] In addition, the utility model has a simple structure, which not only fully and reasonably utilizes the original wind turbine foundation, but also avoids the additional cost of dismantling the original wind turbine foundation. At the same time, it effectively reduces the workload during the construction process, thereby significantly reducing the transportation and construction costs. More importantly, this design significantly shortens the project cycle and shows good economic benefits. In addition, the arc steel plate I-beam assembly is replaceable, which provides a strong guarantee for the long-term use of the reinforced wind turbine expansion foundation platform and further extends its service life.

[0032] The wind turbine expansion foundation platform provided by the embodiment of the utility model may include a cantilever plate and a platform column arranged in sequence from bottom to top, and the reinforcement structure may include at least two arc-shaped steel plates, at least two I-beams, a first anchor bolt and a second anchor bolt; wherein the inner side wall of the arc-shaped steel plate is in close contact with the side wall of the platform column, and the platform column is connected to the first anchor bolt, and its outer side wall is connected to the first end of the I-beam; the I-beam surrounds the platform column, extends outward from the outer side wall of the arc-shaped steel plate along the radial direction of the cantilever plate, and is connected to the cantilever plate through the second anchor bolt, and its lower flange is in close contact with the slope of the cantilever plate. In this way, the demand for wind turbine expansion can be met, and the safe and stable operation of wind power facilities can be ensured.

[0033] In the case that the original fan foundation size is large, in order to better improve the integrity and stability of the fan foundation, refer to Figure 4 As shown, Figure 4 This is a schematic diagram of a wind turbine expansion foundation platform according to another embodiment of the utility model. In some embodiments, the reinforcement structure also includes: a steel connecting beam 8 and bolts 9; the steel connecting beam 8 is arranged at the radial middle position of the cantilever plate 1, and connects two adjacent I-beams 4 through the bolts 9.

[0034] It is understandable that, in the radial middle position of the cantilever plate, around the column, two adjacent I-beams can be connected by the steel connecting beam, thereby improving the integrity and stability of the wind turbine foundation. Specifically, the steel connecting beam and the I-beam can be connected by bolts.

[0035] In some embodiments, the at least two curved steel plates are arranged at equal angles on the side walls of the pillar, and the at least two I-beams are arranged at equal angles on the slope of the cantilever plate.

[0036] Specifically, the arc-shaped steel plate surrounds the column and is evenly distributed on the side wall of the column. The first end of the I-beam is connected to the arc-shaped steel plate, radiates outward from the side wall of the column, is radially evenly distributed on the slope of the cantilever plate, is radially arranged along the cantilever plate, and is symmetrically distributed about the center of the column.

[0037] It can be understood that one of the curved steel plates and one of the I-beams can constitute a group of assemblies, which can be connected by welding. If the number of the curved steel plates is 10, then the corresponding number of the I-beams is also 10, and a total of 10 groups of curved steel plate and I-beam assemblies can be formed.

[0038] In some embodiments, the bottom of the curved steel plate is flush with the junction of the column and the cantilever plate.

[0039] In some embodiments, the bottom of the first end of the I-beam is flush with the bottom of the connection between the arc-shaped steel plate and the I-beam.

[0040] Specifically, the connection point may be a position where the arc-shaped steel plate and the I-beam are welded.

[0041] In some embodiments, the first anchor bolts are disposed on both sides of the arc-shaped steel plate.

[0042] Specifically, in a set of arc-shaped steel plate I-beam assemblies, the number of the first anchor bolts can be 6, which can be divided into two groups and symmetrically arranged on both sides of the arc-shaped steel plate to fix the arc-shaped steel plate on the side wall of the column. The number of the first anchor bolts can also be adjusted according to actual needs.

[0043] In some embodiments, the second anchor bolts are disposed on both sides of the lower flange of the I-beam.

[0044] Specifically, in a set of arc-shaped steel plate I-beam assemblies, the number of the second anchor bolts can be 10, which can be divided into two groups and symmetrically arranged on both sides of the lower flange of the I-beam to fix the I-beam on the cantilever plate and make the lower flange of the I-beam close to the slope of the cantilever plate. The number of the second anchor bolts can also be adjusted according to actual needs.

[0045] In order to be applicable to situations where land acquisition is restricted, in some embodiments, the I-beam is extended along the radial direction of the cantilever plate to the bottom of the slope of the cantilever plate.

[0046] It can be understood that the first end of the I-beam is the end close to the side wall of the column, and can be extended from the first end of the I-beam along the radial direction of the cantilever plate to the bottom of the slope of the cantilever plate, and no longer extended after extending to the bottom of the slope of the cantilever plate. At this time, the end of the I-beam that is flush with the upper edge of the bottom of the slope of the cantilever plate can be the second end of the I-beam. Since the I-beam is not fixed on the foundation, it can be applied to situations where land acquisition is restricted.

[0047] For applications where land acquisition is not restricted and the foundation is rock, see Figure 5 As shown, Figure 5 This is a schematic diagram of a foundation platform for expanding a wind turbine according to another embodiment of the utility model. In some embodiments, the reinforcement structure further includes: a rectangular steel plate 8 and an anchor rod 9; the I-beam 4 is extended radially along the cantilever plate 1, exceeds the bottom of the slope of the cantilever plate 1, and then extends axially to the foundation surface, and is vertically connected to the rectangular steel plate 8 at the position of the foundation surface, and the rectangular steel plate is fixed to the foundation by the anchor rod 9.

[0048] It can be understood that the first end of the I-beam is the end close to the side wall of the column. It can be extended from the first end of the I-beam along the radial direction of the cantilever plate to the bottom of the slope of the cantilever plate, and then continue to extend. After exceeding the bottom of the slope of the cantilever plate, it is vertically extended downward in the axial direction to the foundation surface. At this time, the end of the I-beam close to the foundation surface can be the second end of the I-beam. Then, a steel plate is welded on the contact surface between the I-beam and the foundation surface. The steel plate can be perpendicular to the I-beam, and the welded steel plate is fixed to the foundation by anchor rods. Specifically, there can be 6 anchor rods in a group of arc-shaped steel plate I-beam assemblies, which are divided into two groups and symmetrically arranged on both sides of the arc-shaped steel plate. The number of anchor rods can be adjusted according to actual needs.

[0049] In order to apply to the situation where land acquisition is not restricted and the foundation is soft soil, see Figure 6 As shown, Figure 6 This is a schematic diagram of a foundation platform for expanding wind turbine capacity according to another embodiment of the utility model. In some embodiments, the reinforcement structure further includes: steel concrete piles 8; the I-beam 4 is extended along the radial direction of the cantilever plate 1, exceeds the bottom of the slope of the cantilever plate 1, and then extends axially, and the steel concrete piles 8 are arranged at the foundation position corresponding to the axial extension.

[0050] It can be understood that the first end of the I-beam is the end close to the side wall of the column. It can be extended from the first end of the I-beam along the radial direction of the cantilever plate to the bottom of the slope of the cantilever plate, and then continue to extend. After exceeding the bottom of the slope of the cantilever plate, it is further extended vertically downward in the axial direction by a preset length and perpendicular to the foundation surface. At this time, the end of the I-beam close to the foundation surface can be the second end of the I-beam, and piles can be driven at the foundation position corresponding to the axially extended I-beam to form the steel concrete piles.

[0051] See also Figure 7 As shown, Figure 7 The following is a schematic diagram of a construction method flow of a wind turbine expansion foundation platform according to an embodiment of the utility model. In some embodiments, a construction method flow of a wind turbine expansion foundation platform is provided. The construction method may include:

[0052] S1: Excavate the foundation pit and clean up the debris.

[0053] S2: Determine the number of reinforcement structures according to the cantilever plate size of the original wind turbine foundation; wherein the reinforcement structure includes a curved steel plate, an I-beam and anchor bolts.

[0054] It is understandable that the original wind turbine foundation may include a cantilever plate, a column and a foundation ring, and the original wind turbine foundation plus the newly added reinforcement structure may constitute a new wind turbine expansion foundation platform. The reinforcement structure may include an arc steel plate, an I-beam and an anchor bolt.

[0055] Specifically, the anchor bolts may include a first anchor bolt and a second anchor bolt. One of the curved steel plates and one of the I-beams may constitute a set of curved steel plate I-beam assemblies. In a set of curved steel plate I-beam assemblies, the number of the first anchor bolts may be 6, and the number of the second anchor bolts may be 10. Generally speaking, the first anchor bolts are evenly distributed on both sides of the curved steel plate, and the second anchor bolts are evenly distributed on both sides of the lower flange of the I-beam. The number of the first anchor bolts and the number of the second anchor bolts may be adjusted according to actual needs. The number of the curved steel plates and the I-beams may be determined according to the size of the cantilever plate. In some embodiments, the number of the curved steel plates may be 10, and the number of the I-beams may also be 10.

[0056] S3: Positioning is performed at corresponding positions of the columns of the original wind turbine foundation and the cantilever plate, and holes are drilled using an anchor drill.

[0057] It is understandable that, according to the conditions of the construction site, it can be determined whether to prefabricate the arc steel plate and the I-beam in the factory or weld them on site, and then position them at the corresponding positions of the columns of the original wind turbine foundation and the cantilever plate, and use an anchor drill to drill holes. Specifically, positioning can be performed on the side walls of the columns of the original wind turbine foundation and on the slope of the cantilever plate, and holes can be drilled using an anchor drill.

[0058] S4: burying the anchor bolts and performing grouting operations.

[0059] Specifically, the arc-shaped steel plate can be fixed to the side wall of the column of the original wind turbine foundation by the first anchor bolt, and the I-beam can be fixed to the slope of the cantilever plate by the second anchor bolt.

[0060] S5: Perform anti-rust and anti-corrosion treatment on the reinforced structure, and finally backfill and compact it.

[0061] It is understandable that by performing anti-rust and anti-corrosion treatment on the reinforcement structure, it is possible to prevent the reinforcement structure from being corroded by water, thereby ensuring that the reinforcement structure is not easily damaged when encountering humid weather during use and still maintains good reinforcement performance.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0063] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0064] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A wind turbine expansion foundation platform, the wind turbine expansion foundation platform comprising a cantilever plate and a column arranged in sequence from bottom to top, characterized in that: It also includes a reinforcement structure, which includes: at least two curved steel plates, at least two I-beams, a first anchor bolt and a second anchor bolt; wherein the inner side wall of the curved steel plate is in close contact with the side wall of the column and is connected to the column via the first anchor bolt, and its outer side wall is connected to the first end of the I-beam; the I-beam surrounds the column, extends outward from the outer side wall of the curved steel plate along the radial direction of the cantilever plate, and is connected to the cantilever plate via the second anchor bolt, and its lower flange is in close contact with the slope of the cantilever plate.

2. The wind turbine expansion basic platform according to claim 1, characterized in that: The reinforcement structure also includes: a steel connecting beam and bolts; The steel connecting beam is arranged at the radial middle position of the cantilever plate, and connects two adjacent I-beams through the bolts.

3. The wind turbine expansion basic platform according to claim 1, characterized in that: The at least two arc-shaped steel plates are arranged at equal angles on the side walls of the pillar, and the at least two I-shaped steel beams are arranged at equal angles on the slope of the cantilever plate.

4. The wind turbine expansion basic platform according to claim 1, characterized in that: The bottom of the arc-shaped steel plate is flush with the junction of the platform column and the cantilever plate.

5. The wind turbine expansion basic platform according to claim 1, characterized in that: The bottom of the first end of the I-beam is flush with the bottom of the connection between the arc-shaped steel plate and the I-beam.

6. The wind turbine expansion basic platform according to claim 1, characterized in that: The first anchor bolts are arranged on both sides of the arc-shaped steel plate.

7. The wind turbine expansion basic platform according to claim 1, characterized in that: The second anchor bolts are arranged on both sides of the lower flange of the I-beam.

8. The wind turbine expansion basic platform according to claim 1, characterized in that: The I-beam is extended along the radial direction of the cantilever plate to the slope bottom of the cantilever plate.

9. The wind turbine expansion basic platform according to claim 1, characterized in that: The reinforcement structure also includes: a rectangular steel plate and an anchor rod; The I-beam is extended radially along the cantilever plate, exceeds the bottom of the slope of the cantilever plate, and then is extended axially to the foundation surface, and is vertically connected to the rectangular steel plate at the position of the foundation surface, and the rectangular steel plate is fixed to the foundation by the anchor rod.

10. The wind turbine expansion basic platform according to claim 1, characterized in that: The reinforcement structure also includes: steel concrete piles; The I-beam is extended along the radial direction of the cantilever plate, exceeds the slope bottom of the cantilever plate, and then is extended along the axial direction, and the steel concrete pile is arranged at the foundation position corresponding to the axial extension.

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