A ground-based power generation equipment foundation for high-altitude wind energy

Abstract

A foundation for a ground-based power generation device for high-altitude wind power generation includes: a reinforced concrete foundation body, which is generally rectangular in shape and its bottom is set on the bearing layer of the foundation; and a ground-based power generation device mounting steel plate, which is set on top of the reinforced concrete foundation body for arranging and fixing the entire ground-based power generation device. A secondary grouting layer is provided between the ground-based power generation device mounting steel plate, the reinforced concrete foundation body, and the ground-based power generation device. The ground-based power generation device mounting steel plate is connected to the reinforced concrete foundation body through several pre-installed anchoring components. This invention fills the gap in the design of generator equipment foundations for high-altitude wind power generation technology research projects, ensuring the safety, reliability, stability, and flatness of the equipment installation, while also considering construction convenience and economy.

Description

Technical Field

[0001] This invention relates to the field of high-altitude wind power technology, and in particular to a foundation for a ground-based power generation device for high-altitude wind energy. Background Technology

[0002] The parachute-ladder combined land-based high-altitude wind power generation technology, as a new technology for the large-scale development and utilization of high-altitude wind resources, places the generator on the ground and generates electricity through the up-and-down reciprocating motion of the "parachute group".

[0003] In the umbrella-ladder combined land-based high-altitude wind power generation technology, the design of the power generation equipment foundation not only involves the stability of the ground equipment but also relates to the safety and efficiency of the entire system. Therefore, the ground power generation equipment foundation for high-altitude wind power is the most important part of the project and is crucial for its realization. However, current technologies lack specific design guidelines for the ground power generation equipment foundation for high-altitude wind power.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a foundation for ground-based power generation equipment for high-altitude wind power generation. This foundation can fill the gap in the design of generator equipment foundations for high-altitude wind power generation technology research projects, ensuring the safety, reliability, stability, and flatness of equipment installation, while also taking into account construction convenience and economy.

[0006] A foundation for a ground-based power generation device for high-altitude wind energy according to the present invention comprises:

[0007] The reinforced concrete foundation body is in the shape of a rectangular block, and its bottom is set on the bearing layer of the foundation.

[0008] The ground-mounted power generation equipment is mounted on top of the reinforced concrete foundation and is used to arrange and fix the entire ground-mounted power generation equipment.

[0009] A secondary grouting layer is provided between the ground power generation equipment installation steel plate, the reinforced concrete foundation body, and the ground power generation equipment. At the same time, the ground power generation equipment installation steel plate and the reinforced concrete foundation body are connected by several reserved anchoring components.

[0010] According to some embodiments of the present invention, the reserved anchoring assembly includes reserved anchor bolt holes formed on the ground power generation equipment mounting steel plate and reserved anchor bolts, reserved steel mesh, and reserved anchor plates disposed in the reinforced concrete foundation body. The lower end of each set of reserved anchor bolts is connected to a corresponding reserved anchor plate by a corresponding nut, and the upper end of each set of reserved anchor bolts passes through a corresponding set of reserved anchor bolt holes and is fixedly connected by corresponding double nuts and leveling nuts arranged on the upper and lower parts of the ground power generation equipment mounting steel plate. Multiple reserved steel meshes are arranged vertically in layers in the reinforced concrete foundation body and are longitudinally passed through by all reserved anchor bolts. Reserved grouting holes for secondary grouting after leveling are also provided on the ground power generation equipment mounting steel plate.

[0011] According to some embodiments of the present invention, the reserved steel mesh includes a first set of reserved steel mesh and a second set of reserved steel mesh arranged alternately, wherein the spacing between the steel bars in the first set of reserved steel mesh is smaller than the spacing between the steel bars in the second set of reserved steel mesh.

[0012] According to some embodiments of the present invention, the ground power generation equipment mounting steel plate includes a cable storage winch base mounting steel plate, a tensioning device base mounting steel plate, a winch drum base mounting steel plate, and a motor base and gearbox base mounting steel plate. The cable storage winch base mounting steel plate and the tensioning device base mounting steel plate are symmetrically arranged on the upper surface of the reinforced concrete foundation body, the winch drum base mounting steel plate is arranged on the middle surface of the reinforced concrete foundation body, and the motor base and gearbox base mounting steel plate is arranged on the lower surface of the reinforced concrete foundation body. The ground power generation equipment mounting steel plate is configured as a special-shaped steel plate adapted to the corresponding ground power generation equipment.

[0013] According to some embodiments of the present invention, two embedded parts are symmetrically arranged at the two corners on one side of the rope-out direction of the hoist drum base mounting steel plate. Each embedded part is composed of anchor bars and shear keys. A first hidden column is set at the lower end of each embedded part. A second hidden column is set at the lower end of each set of reserved anchor bolts located at the tail of the hoist drum base mounting steel plate.

[0014] According to some embodiments of the present invention, two cable channel openings for connecting to the cable trench in the factory area are symmetrically provided on the reinforced concrete foundation body corresponding to the mounting steel plates on both sides of the motor base and the gearbox base.

[0015] A control box base opening is provided on the reinforced concrete foundation body corresponding to the outer side of the cable storage winch base mounting steel plate, and two control box base mounting channel steels are symmetrically arranged on the reinforced concrete foundation body on both sides of the control box base opening.

[0016] According to some embodiments of the present invention, the reinforced concrete foundation body is configured as a reinforced concrete flat raft foundation, which includes an underground portion of the raft foundation in which concrete is poured in one go and an above-ground portion of the raft foundation.

[0017] According to some embodiments of the present invention, the plan dimensions of the reinforced concrete flat raft foundation are 15m x 7.6m, the thickness of the underground portion of the raft foundation is 1.2m, and the thickness of the above-ground portion of the raft foundation is 0.22m.

[0018] According to the present invention, a ground-mounted power generation equipment foundation for high-altitude wind power can utilize a combination design of a reinforced concrete foundation body, a ground-mounted power generation equipment mounting steel plate, a secondary grouting layer, and a reserved anchoring component to enable the foundation to have a large horizontal force, ensuring the safety, reliability, stability, and flatness of the equipment installation. This is the first ground-mounted power generation equipment foundation for high-altitude wind power.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a plan view of some embodiments of the ground-based power generation equipment foundation for high-altitude wind power according to the present invention.

[0022] Figure 2 for Figure 1 Cross-sectional view at point AA.

[0023] Figure 3 for Figure 2 Enlarged view of a section at point C.

[0024] Figure 4 for Figure 1 Cross-sectional view at point BB.

[0025] Figure 5 for Figure 4 Enlarged view of a section at point D.

[0026] Figure 6 This is a schematic diagram of some embodiments of the reserved anchoring components in the foundation of ground-based power generation equipment for high-altitude wind power according to the present invention.

[0027] Meaning of the labels in the attached diagram:

[0028] 1- Reinforced concrete foundation body;

[0029] 11-The underground portion of the raft foundation;

[0030] 12 - Above-ground portion of raft foundation;

[0031] 13- Cable channel opening;

[0032] 14- Control box base opening;

[0033] 15 - Control box base mounting channel steel;

[0034] 2- Steel plates for mounting ground-based power generation equipment;

[0035] 21- Cable storage winch base mounting steel plate;

[0036] 22-Tensioning device base mounting steel plate;

[0037] 23-Wind winch drum base mounting steel plate; 231-Embedded part; 232-First concealed column; 233-Second concealed column;

[0038] 24-Motor base and gearbox base mounting steel plate;

[0039] 3-Pre-installed anchoring components;

[0040] 31-Pre-drilled anchor bolt hole; 311-Nut; 312-Double nut; 313-Leveling nut;

[0041] 32 - Reserved anchor bolts;

[0042] 33-Reserved steel mesh; 331-First set of reserved steel mesh; 332-Second set of reserved steel mesh;

[0043] 34-Reserved anchor plate;

[0044] 35 - Reserved grouting hole;

[0045] 4-Secondary grouting layer;

[0046] 5-Ground-based power generation equipment;

[0047] 51 - Equipment base plate;

[0048] 6-Bearing stratum of the foundation;

[0049] 61 - Foundation cushion layer. Detailed Implementation

[0050] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0051] The following is based on Figures 1-6 The present invention provides a detailed description of the foundation for a ground-based power generation device for high-altitude wind energy.

[0052] Please refer to Figure 1-6 This invention provides a foundation for a ground-based power generation device for high-altitude wind power, comprising a reinforced concrete foundation body 1 and a ground-based power generation device mounting steel plate 2. The reinforced concrete foundation body 1 is generally rectangular in shape, with its bottom set on the foundation bearing layer 6. The ground-based power generation device mounting steel plate 2 is set on top of the reinforced concrete foundation body 1 for arranging and fixing the entire ground-based power generation device 5. A secondary grouting layer 4 is provided between the ground-based power generation device mounting steel plate 2, the reinforced concrete foundation body 1, and the ground-based power generation device 5. The ground-based power generation device mounting steel plate 2 and the reinforced concrete foundation body 1 are connected by several reserved anchoring components 3.

[0053] Specifically, the ground power generation equipment 5 can be mainly composed of a cable storage winch, a tensioning device, a winch base, a motor, a gearbox, and a control box. During installation, the ground power generation equipment 5 can be connected to the corresponding mounting steel plates through the equipment base plates 51 of each component.

[0054] The secondary grouting layer 4 is used to level the ground-mounted power generation equipment mounting steel plate 2 and to fill the space under the steel plate 2 to support the weight of the equipment foundation and the equipment load. Furthermore, by using the leveling nut 313, the flatness of the ground-mounted power generation equipment mounting steel plate 2 can meet the equipment manufacturer's requirements for equipment installation flatness and stress.

[0055] In this embodiment of the invention, reference is made to Figure 6 , Figure 3 , Figure 5 The pre-installed anchoring assembly 3 includes pre-installed anchor bolt holes 31 opened on the ground power generation equipment mounting steel plate 2 and pre-installed anchor bolts 32, pre-installed steel mesh 33 and pre-installed anchor plates 34 set in the reinforced concrete foundation body 1. The lower end of each set of pre-installed anchor bolts 32 is connected to a corresponding pre-installed anchor plate 34 through a corresponding nut 311. The upper end of each set of pre-installed anchor bolts 32 passes through a corresponding set of pre-installed anchor bolt holes 31 and is fixedly connected by corresponding double nuts 312 and leveling nuts 313 arranged on the upper and lower parts of the ground power generation equipment mounting steel plate 2. Multiple pre-installed steel mesh 33 are arranged vertically in layers in the reinforced concrete foundation body 1 and are longitudinally passed through by all the pre-installed anchor bolts 32. The ground power generation equipment mounting steel plate 2 is also provided with pre-installed grouting holes 35 for secondary grouting after leveling.

[0056] Regarding the reserved anchor bolt 32, high-strength anchor bolts are required. Specifically, a set of reserved anchor bolt holes 31 can consist of two or four high-strength anchor bolts. However, the "Steel Structure Design Manual" (4th Edition) only specifies the selection requirements for Q235 and Q345 steel anchor bolts (i.e., specifying the anchor bolt style, anchorage length, and stress, etc.), while domestic specifications or standards do not clearly define the requirements for high-strength anchor bolts. The applicant used ANSYS WORKBENCH 2020 to numerically simulate the coupling between the M24 anchor bolts of the cable storage winch equipment base, the M36 anchor bolts of the winch drum base, and the M48 anchor bolts of the transformer base and the winch foundation concrete. Under a given tensile force, the bolts should meet the ultimate bearing capacity and serviceability limit. Calculations and analyses were performed under specified design loads to derive the anchorage length requirements for economical anchor bolts and verify their strength.

[0057] The main stress range of the reserved anchor bolt 32 has a large tensile stress. The combination of the reserved steel mesh 33 and the reserved anchor plate 34 can increase the concrete's ability to resist tensile stress in this stress range and increase the reliability of the structure.

[0058] The applicant's research found that the failure mode of anchor plate type anchor bolts tends towards cone-shaped concrete spalling failure, and the angle between the generatrix of the cone-shaped failure surface and the horizontal plane increases with the increase of the anchoring depth of the anchor bolt. Furthermore, the stress gradually decreases with increasing anchoring depth; and when concrete spalling occurs, the stress concentration in the concrete near the bolt is more pronounced, and the stress distribution is an inverted cone shape. Therefore, it is concluded that the preferred design for the pre-reserved steel mesh 33 at the anchor bolt 32 is a style with unequal diameters and unequal spacing. (Refer to...) Figure 6 For example, the reserved steel mesh 33 of the present invention includes a first set of reserved steel mesh 331 and a second set of reserved steel mesh 332 arranged alternately. The spacing of the steel bars in the first set of reserved steel mesh 331 is smaller than the spacing of the steel bars in the second set of reserved steel mesh 332.

[0059] The reserved anchoring component 3 is set according to the equipment installation requirements. The ground power generation equipment mounting steel plate 2 is set to assist in the positioning of the reserved anchor bolts 32 and ensure flatness. Since the positioning and installation height requirements of the reserved anchoring component 3 are high, by setting the ground power generation equipment mounting steel plate 2, the bolt group openings of the equipment base plate 51 can be accurately positioned with the reserved anchoring component 3. At the same time, by leveling the elevation of the ground power generation equipment mounting steel plate 2, the elevation requirements of the equipment base plate 51 can be met.

[0060] In this embodiment of the invention, reference is made to Figure 1The ground-mounted power generation equipment mounting steel plate 2 includes a cable storage winch base mounting steel plate 21, a tensioning device base mounting steel plate 22, a winch drum base mounting steel plate 23, and a motor base and gearbox base mounting steel plate 24. The cable storage winch base mounting steel plate 21 and the tensioning device base mounting steel plate 22 are symmetrically arranged on the upper part of the surface of the reinforced concrete foundation body 1, the winch drum base mounting steel plate 23 is arranged in the middle of the surface of the reinforced concrete foundation body 1, and the motor base and gearbox base mounting steel plate 24 is arranged on the lower part of the surface of the reinforced concrete foundation body 1.

[0061] Also refer to Figure 1 In this embodiment of the invention, the ground-mounted power generation equipment mounting steel plate 2 is configured as a special-shaped steel plate adapted to the corresponding ground-mounted power generation equipment 5. The design of the special-shaped steel plate, when used in conjunction with the corresponding ground-mounted power generation equipment 5, can meet the extremely high positioning strength requirements of the anchor bolts for the foundation of ground-mounted power generation equipment used for high-altitude wind energy.

[0062] In this embodiment of the invention, reference is made to Figure 1 To resist the tension in the direction of the rope discharge, two embedded parts 231 can be symmetrically set at the two corners on the side of the steel plate 23 on the direction of the rope discharge. Each embedded part 231 is composed of anchor bars and shear keys. A first hidden column 232 is set at the lower end of each embedded part 231. The setting of the shear key can resist the large horizontal force along the direction of the rope discharge and prevent the embedded parts from being pulled out. The setting of the first hidden column 232 can increase the safety and reliability of the structure here and more effectively prevent the anchor bars or shear keys from being pulled out.

[0063] In order to resist the tension of the anchor bolts 32 reserved on both sides of the tail of the winch drum base, a second hidden column 233 can be set at the lower end of each set of anchor bolts 32 located at the tail of the steel plate 23 corresponding to the winch drum base.

[0064] In this embodiment of the invention, reference is made to Figure 1 Two cable channel openings 13 for connecting to the cable trench in the factory area are symmetrically provided on the reinforced concrete foundation body 1 on both sides of the mounting steel plate 24 corresponding to the motor base and gearbox base. A control box base opening 14 is provided on the reinforced concrete foundation body 1 on the outer side of the mounting steel plate 21 corresponding to the cable storage winch base. Two control box base mounting channel steels 15 are symmetrically provided on the reinforced concrete foundation body 1 on both sides of the control box base opening 14.

[0065] More specifically, the control box base mounting channel steel 15 can be made of hot-dip galvanized channel steel. After the control box of the ground power generation equipment 5 is placed in the control box base opening 14, the control box can be fixed by means of the control box base mounting channel steel 15.

[0066] Reference Figure 2 and Figure 4In this embodiment of the invention, the reinforced concrete foundation body 1 is configured as a reinforced concrete flat raft foundation, which includes an underground part 11 of the raft foundation with concrete poured in one go and an above-ground part 12 of the raft foundation.

[0067] Reference Figure 2 and Figure 4 The reinforced concrete flat raft foundation of this embodiment has a planar dimension of 15m x 7.6m, a thickness of 1.2m for the underground part 11 of the raft foundation, and a thickness of 0.22m for the above-ground part 12 of the raft foundation.

[0068] Reference Figure 1-6 In the specific preparation of the foundation for the ground-mounted power generation equipment for high-altitude wind energy according to this embodiment of the invention, a foundation cushion layer 61 is first constructed on the bearing layer 6. Then, a reinforced concrete flat raft foundation is formed by pouring concrete in one go on the foundation cushion layer 61. The backfill soil on the foundation side is compacted in layers, with a layer thickness of no more than 250mm and a compaction coefficient of no less than 0.94. After the foundation strength meets the requirements, the ground-mounted power generation equipment installation steel plates 2 are arranged on the foundation plane of the reinforced concrete flat raft foundation. The top elevation of each installation steel plate is 0.3m. Then, the ground-mounted power generation equipment installation steel plates 2 are fixed to the reinforced concrete flat raft foundation using the reserved anchoring components 3. Finally, the surface is leveled with leveling nuts 313 and grouting is performed a second time.

[0069] The foundation for ground-based wind power generation equipment in this embodiment of the invention incorporates the following structural design features: concealed columns; shear keys; various equipment mounting steel plates; high-strength anchor bolts (i.e., multiple sets of pre-installed anchor bolts 32); pre-installed anchor bolts 32 and mounting steel plates in a complete set; leveling nuts 313 for leveling; secondary grouting; and the design of the reinforcing mesh and anchorage length. These features ensure that the foundation has a large horizontal force and guarantees high foundation installation accuracy.

[0070] Furthermore, the ground-based power generation equipment foundation for high-altitude wind power in this embodiment of the invention, through its structural form, ensures the safety and reliability of the original structure while also achieving ease of construction and economy. After use, it fills a gap in the design of generator equipment foundations for high-altitude wind power generation technology research projects and provides a reference for the design of generator equipment foundations in subsequent similar projects.

[0071] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0072] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0073] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0074] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications and equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A foundation for a ground-based power generation device for high-altitude wind energy, characterized in that, include: The reinforced concrete foundation body is generally rectangular in shape, and its bottom is set on the bearing layer of the foundation. A ground-mounted power generation equipment mounting steel plate is installed on top of the reinforced concrete foundation body and is used to arrange and fix the entire ground-mounted power generation equipment. A secondary grouting layer is provided between the ground power generation equipment mounting steel plate, the reinforced concrete foundation body, and the ground power generation equipment. At the same time, the ground power generation equipment mounting steel plate and the reinforced concrete foundation body are connected by several reserved anchoring components. The pre-installed anchoring assembly includes pre-installed anchor bolt holes formed on the ground power generation equipment mounting steel plate and pre-installed anchor bolts, pre-installed steel mesh, and pre-installed anchor plates disposed within the reinforced concrete foundation body. The lower end of each set of pre-installed anchor bolts is connected to a corresponding pre-installed anchor plate via a corresponding nut, and the upper end of each set of pre-installed anchor bolts passes through a corresponding set of pre-installed anchor bolt holes and is fixedly connected via corresponding double nuts and leveling nuts arranged on the upper and lower parts of the ground power generation equipment mounting steel plate. Multiple pre-installed steel meshes are arranged vertically in layers within the reinforced concrete foundation body and are longitudinally passed through by all the pre-installed anchor bolts. The ground power generation equipment mounting steel plate is also provided with pre-installed grouting holes for secondary grouting after leveling. The ground power generation equipment mounting steel plate includes a cable storage winch base mounting steel plate, a tensioning device base mounting steel plate, a winch drum base mounting steel plate, and a motor base and gearbox base mounting steel plate. The cable storage winch base mounting steel plate and the tensioning device base mounting steel plate are symmetrically arranged on the upper surface of the reinforced concrete foundation body, the winch drum base mounting steel plate is arranged on the middle surface of the reinforced concrete foundation body, and the motor base and gearbox base mounting steel plate is arranged on the lower surface of the reinforced concrete foundation body. The ground power generation equipment mounting steel plate is configured as a special-shaped steel plate adapted to the corresponding ground power generation equipment. The reserved steel mesh includes a first set of reserved steel mesh and a second set of reserved steel mesh arranged alternately, wherein the spacing between the steel bars in the first set of reserved steel mesh is smaller than the spacing between the steel bars in the second set of reserved steel mesh.

2. The foundation for a ground-based power generation device for high-altitude wind energy according to claim 1, characterized in that, Two embedded parts are symmetrically arranged at the two corners on one side of the rope-out direction of the steel plate mounting base of the winch drum. Each embedded part is composed of an anchor bar and a shear key. A first hidden column is set at the lower end of each embedded part. A second hidden column is set at the lower end of each set of reserved anchor bolts at the tail of the steel plate mounting base of the winch drum.

3. The foundation for a ground-based power generation device for high-altitude wind energy according to claim 2, characterized in that, Two cable channel openings for connecting to the factory cable trench are symmetrically provided on the reinforced concrete foundation body corresponding to the two sides of the mounting steel plate of the motor base and the gearbox base. A control box base opening is provided on the reinforced concrete foundation body corresponding to the outer side of the cable storage winch base mounting steel plate, and two control box base mounting channel steels are symmetrically arranged on the reinforced concrete foundation body on both sides of the control box base opening.

4. The foundation for a ground-based power generation device for high-altitude wind energy according to claim 1, characterized in that, The reinforced concrete foundation body is configured as a reinforced concrete flat raft foundation, which includes an underground part of the raft foundation with concrete poured in one go and an above-ground part of the raft foundation.

5. A foundation for a ground-based power generation device for high-altitude wind energy according to claim 4, characterized in that, The reinforced concrete flat raft foundation has a plan dimension of 15m x 7.6m, the thickness of the underground portion of the raft foundation is 1.2m, and the thickness of the above-ground portion of the raft foundation is 0.22m.

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