Foundation reinforcing structure of wind generating set

Abstract

The utility model discloses a foundation reinforcing structure of a wind generating set, which comprises a fan foundation and a plurality of thermal shrinkage reinforcing structures fixed at the bottom of the fan foundation, and each thermal shrinkage reinforcing structure comprises a thermal shrinkage sleeve, a concrete layer and a reinforcing sleeve; the heat-shrinkable sleeve is vertically arranged and abuts against the fan foundation, the heat-shrinkable sleeve is a hollow cylinder with a cavity, the end, not abutting against the fan foundation, of the heat-shrinkable sleeve is a soft soil inlet end, and the heat-shrinkable sleeve is sleeved with the reinforcing sleeve which is in clearance fit with the heat-shrinkable sleeve. And the concrete layer is filled between the heat-shrinkable sleeve and the reinforcing sleeve. According to the utility model, heat generated by concrete is utilized to enable the heat-shrinkable sleeve to deform, and soft soil entering the cavity of the heat-shrinkable sleeve is extruded and compressed, so that the strength and the bearing capacity of the soft soil are improved, and the combination degree between the soft soil and the heat-shrinkable sleeve is enhanced; the construction quality of the wind generating set is greatly improved, the construction difficulty is reduced, and the engineering construction cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power engineering construction assistance, in particular to a foundation reinforcement structure of a wind power generator set. Background Art

[0002] Onshore wind power projects use wind energy on land to generate electricity through wind turbines. Due to the large scale of onshore wind farms, the capacity of a single wind turbine is small and the influence between generators is large, so the individual wind turbines in the wind farm are scattered and occupy a large area. Since the wind turbines configured in wind farms are huge and heavy, they have high requirements for geological conditions. If there is a weak foundation, it is easy to cause the wind turbine generator set to sink too deep, resulting in increased construction costs, extended construction periods, and increased construction and operation risks of wind power projects.

[0003] The Chinese patent application with publication number CN117027041A discloses a wind turbine foundation and a wind turbine generator set. The wind turbine foundation includes a cushion layer, a first steel cage, a plurality of second steel cages, a plurality of stone groups and a concrete foundation, wherein the first steel cage extends along the axial direction of the cushion layer, the second steel cage extends along the radial direction of the cushion layer, the second steel cage is connected to the first steel cage, the stone group is arranged on the cushion layer, the stone group is located between two adjacent second steel cages, and the concrete foundation is arranged on the cushion layer and wraps the first steel cage, the second steel cage and the stone group. The stone group of the wind turbine foundation of the embodiment of the application has a certain mass and volume to ensure the design strength of the wind turbine foundation.

[0004] Although the technical solution disclosed in the above patent application can increase the contact area between the wind turbine foundation and the ground and improve the strength by increasing the mass and volume of the wind turbine foundation, its structure is complex, the pouring construction volume is large, and it fails to solve the settlement problem caused by the weak foundation under the wind turbine foundation. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a foundation reinforcement structure of a wind turbine generator set with a simple structure, which can effectively improve the foundation strength.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: the foundation reinforcement structure of the wind turbine generator set includes a fan foundation, and also includes multiple heat shrinkage reinforcement structures fixed at the bottom of the fan foundation, the heat shrinkage reinforcement structure includes a heat shrinkage sleeve, a concrete layer and a reinforcement sleeve; the heat shrinkage sleeve is vertically arranged and abutted against the fan foundation, the heat shrinkage sleeve is a hollow cylinder with a cavity and the end of the heat shrinkage sleeve that is not abutted against the fan foundation is the soft soil entrance end, the reinforcement sleeve is sleeved on the outside of the heat shrinkage sleeve and cooperates with the gap of the heat shrinkage sleeve, and the concrete layer is filled between the heat shrinkage sleeve and the reinforcement sleeve. The utility model sets a heat shrinkage reinforcement structure under the wind turbine generator set, supports the wind turbine foundation through the heat shrinkage reinforcement structure, and reinforces the foundation under the wind turbine foundation by using the heat shrinkage reinforcement structure; the heat shrinkage sleeve in the heat shrinkage reinforcement mechanism can absorb the heat released by the concrete during the solidification of the concrete layer and deform, and the inner diameter of the heat shrinkage sleeve shrinks to squeeze the soft soil entering the inside of the heat shrinkage sleeve to reinforce the weak foundation, and the undulating surface formed by the heat shrinkage sleeve after deformation can increase the contact area and friction between the heat shrinkage sleeve and the ground, further improving the reinforcement effect of the foundation; and the reinforcement sleeve outside the heat shrinkage reinforcement structure can increase the outer layer strength of the heat shrinkage reinforcement structure. The utility model improves the strength and bearing capacity of the weak foundation under the wind turbine foundation through a simple structure, and can effectively improve the stability of the wind turbine foundation and the bearing capacity of the foundation for the wind turbine.

[0007] As an improvement of the above scheme: the heat shrinkable sleeve is a conical sleeve structure made of PET material, and the diameter of the heat shrinkable sleeve near the fan foundation end is larger than the diameter of the heat shrinkable sleeve away from the fan foundation end. The heat shrinkable sleeve in the utility model can adopt a circular sleeve structure or a conical sleeve structure, and the conical sleeve structure is the preferred scheme. The conical sleeve structure can be easily inserted into the foundation and improve the efficiency of soft soil entering the heat shrinkable sleeve. At the same time, the sleeve structure with a large top and a small bottom can also increase the difficulty of soft soil being discharged from the heat shrinkable sleeve. When the heat shrinkable sleeve is deformed and squeezes the internal soft soil, the soft soil can be prevented from being squeezed out, thereby improving the filling quality of the soft soil in the heat shrinkable sleeve. The utility model uses PET material with good mechanical properties and water isolation properties to prepare the shrinkable sleeve, which can effectively improve the service life of the heat shrinkable reinforcement structure.

[0008] As an improvement of the above scheme: the reinforcement sleeve is a circular sleeve structure formed by rolling up a steel sheet and welding the ends together. The end of the reinforcement sleeve away from the fan foundation is bent toward the heat shrink sleeve and fixedly connected to the heat shrink sleeve to form a sealed end at the bottom of the heat shrink reinforcement structure. The utility model uses a circular sleeve structure to form a stable reinforcement layer outside the heat shrink reinforcement structure. The reinforcement sleeve is made of a steel sheet that is easy to obtain and has high strength. It can effectively improve the overall strength of the heat shrink reinforcement structure while reducing costs.

[0009] As an improvement of the above solution: the end of the reinforcement sleeve close to the fan foundation is bent in a direction away from the heat shrinkable sleeve, and the bent portion abuts against the fan foundation. The utility model improves the structure of the reinforcement sleeve, bends the upper end of the reinforcement sleeve outward to form an extension portion, and uses the extended bent portion to form a support for contact with the fan foundation, thereby increasing the contact area between the heat shrinkable reinforcement structure and the fan foundation and improving the bearing capacity of the heat shrinkable reinforcement structure.

[0010] As an improvement of the above solution: the heat shrinkage reinforcement structures are evenly arranged in an array below the fan foundation.

[0011] The beneficial effects of the utility model are as follows: the utility model arranges a heat shrinkage reinforcement structure in the soft soil foundation below the wind turbine foundation, can fill the gap between the reinforcement sleeve and the heat shrinkage sleeve by pouring high-temperature concrete slurry, and utilizes the heat generated by the concrete to deform the heat shrinkage sleeve, thereby squeezing and compacting the soft soil entering the cavity of the heat shrinkage sleeve, thereby improving the strength and bearing capacity of the soft soil and enhancing the degree of bonding between the soft soil and the heat shrinkage sleeve; the utility model can reinforce the soft soil foundation to improve its bearing capacity without using prefabricated steel bars and heavy bases, thereby greatly improving the construction quality of the wind turbine generator set, reducing the construction difficulty, and saving engineering construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is a schematic diagram of one implementation structure of the heat shrinkage reinforcement structure in the utility model;

[0014] Figure 3 It is a schematic diagram of another implementation structure of the heat shrinkage reinforcement structure in the utility model.

[0015] Markings in the figure are: 100-fan foundation, 200-heat shrinkage reinforcement structure, 210-heat shrinkage sleeve, 220-concrete layer, 230-reinforcement sleeve, 240-cavity. DETAILED DESCRIPTION

[0016] In order to facilitate the understanding of the present invention, the present invention is further described below in conjunction with the accompanying drawings.

[0017] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "front", "rear", "left", "right", "up", "down", and "inside" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of description. They do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0018] like Figure 1 As shown, the foundation reinforcement structure of the wind turbine generator set disclosed in the utility model includes a wind turbine foundation 100 and a heat shrinkage reinforcement structure 200 vertically arranged below the wind turbine foundation 100. The heat shrinkage reinforcement structure 200 is provided in plurality, and the multiple heat shrinkage reinforcement structures 200 are arranged in the soft soil foundation below the wind turbine foundation 100 to reinforce the soft soil foundation so as to improve the strength of the soft soil foundation and provide bearing capacity for the wind turbine foundation 100. The heat shrinkage reinforcement structures 200 are arranged in an array in a uniform manner as a preferred embodiment, which can improve the uniformity of force.

[0019] The heat shrinkage reinforcement structure 200 used in the present invention can not only form a reinforcement structure in the soft soil foundation, but also improve the strength of the soft soil foundation by compacting the soft soil. Figure 2 and Figure 3 As shown, the heat shrinkable reinforcement structure 200 is composed of a heat shrinkable tube 210, a concrete layer 220 and a reinforcement sleeve 230 which are arranged in sequence from the inside to the outside.

[0020] Specifically, the heat shrinkable sleeve 210 adopts a hollow cylindrical structure with a cavity 240. The end of the heat shrinkable sleeve 210 that is not in contact with the wind turbine foundation 100 is the soft soil entrance end, and the soft soil in the soft soil foundation can enter the cavity 240 through the soft soil entrance end; the reinforcement sleeve 230 also adopts a hollow cylindrical structure and is sleeved on the outside of the heat shrinkable sleeve 210. The reinforcement sleeve 230 and the heat shrinkable sleeve 210 are matched with each other to leave a gap between the heat shrinkable sleeve 210 and the reinforcement sleeve 230, and the concrete layer 220 is filled in the gap between the heat shrinkable sleeve 210 and the reinforcement sleeve 230. The heat shrinkable reinforcement structure 200 is inserted into the soft soil foundation below the fan foundation 100, so that the soft soil of the soft soil foundation enters the cavity 240 inside the heat shrinkable sleeve 210 to fill the cavity 240, and the gap between the heat shrinkable sleeve 210 and the reinforcement sleeve 230 is poured with high-strength concrete slurry; the utility model utilizes the characteristic that high-strength concrete will generate heat during the pouring and curing process, and the heat emitted by the high-strength concrete is transferred to the heat shrinkable sleeve 210 in contact with the concrete. The heating temperature of the high-strength concrete can reach 60-80°C, and the heat shrinkable sleeve 210 shrinks and deforms due to the heat, squeezing and compacting the soft soil filled in the cavity 240 of the heat shrinkable sleeve 210, and at the same time, the surface of the heat shrinkable sleeve 210 in contact with the soft soil is deformed into a concave-convex surface, thereby improving the bonding ability with the soft soil. After the concrete is cured, it is completely solidified to form a concrete layer 220. The deformation of the heat shrinkable tube 210 is supported by the solid concrete layer 220 and will not be restored, thereby forming a stable reinforcement effect on the soft soil foundation. The utility model uses the heat of the high-strength concrete itself to heat and deform the heat shrinkable tube 210 without using an external heating device, thereby effectively reducing the construction cost and construction difficulty. At the same time, the fluidity of the high-strength concrete slurry can effectively fill the gaps in the heat shrinkable reinforcement structure 200 during the pouring process, fill the cracks in the heat shrinkable tube 210 after deformation, so that the heat shrinkable tube 210, the concrete layer 220 and the reinforcement sleeve 230 form a complete heat shrinkable reinforcement structure 200, and there will be no gaps at the connection of each component, thereby effectively improving the overall strength and bearing capacity of the heat shrinkable reinforcement structure 200.

[0021] Further, such as Figure 2 and Figure 3As shown, the heat shrinkable sleeve 210 can adopt a circular sleeve structure or a conical sleeve structure; the conical sleeve structure in the utility model is the preferred solution of the heat shrinkable sleeve 210, and the diameter of the heat shrinkable sleeve 210 at one end close to the fan foundation 100 is larger than the diameter of the heat shrinkable sleeve 210 at one end away from the fan foundation 100, so that the heat shrinkable sleeve 210 forms a structure with a large top and a small bottom. The conical sleeve structure can facilitate the insertion of the heat shrinkable sleeve 210 into the soft soil foundation and improve the efficiency of the soft soil entering the heat shrinkable sleeve 210. At the same time, the sleeve structure with a large top and a small bottom can also increase the difficulty of the soft soil being discharged from the heat shrinkable sleeve 210. When the heat shrinkable sleeve 210 is deformed and squeezes the internal soft soil, it can prevent the soft soil from being squeezed out, thereby improving the filling quality of the soft soil in the heat shrinkable sleeve 210.

[0022] Furthermore, the heat shrinkable tube 210 in the present invention is made of a material with heat shrinking properties, and PET (polyethylene terephthalate) is the preferred embodiment. PET is non-toxic and tasteless, has good mechanical properties and water insulation properties, and is resistant to most solvents; the heat shrinkable tube 210 made of PET can effectively increase its service life. The heat shrinkable tube 210 is irreversible and has high stability. After being deformed by heat, it will not be deformed again due to temperature drop or increase, so it can play a stable reinforcement role on the soft soil foundation.

[0023] Specifically, Figure 2 and Figure 3 As shown, the reinforcement sleeve 230 used in the present invention is a circular sleeve structure, and the inner diameter of the reinforcement sleeve 230 is larger than the outer diameter of the heat shrink sleeve 210. Since the reinforcement sleeve 230 mainly plays the role of enhancing the overall strength of the heat shrinkable reinforcement structure 200, it is made of steel with higher strength; the reinforcement sleeve 230 can be formed by hot-rolling and coiling the steel sheet with convenient material and welding the first end of the steel sheet. The thickness of the raw steel sheet and the length after forming can be selected according to the actual conditions such as the different strengths and depths of the soft soil foundation and the upper equipment load. Further, in order to avoid the gap between the heat shrinkable sleeve 210 and the reinforcement sleeve 230 in the soft soil, the end of the reinforcement sleeve 230 away from the wind turbine foundation 100 can be bent toward the heat shrinkable sleeve 210 and fixedly connected to the heat shrinkable sleeve 210, so that the bottom of the heat shrinkable reinforcement structure 200 forms a sealed end. Furthermore, in order to improve the supporting effect of the heat shrinkable reinforcement structure 200 on the fan foundation 100, the end of the reinforcement sleeve 230 close to the fan foundation 100 can be bent in a direction away from the heat shrinkable sleeve 210 to form an extension portion, and the extension portion abuts against the fan foundation 100, thereby increasing the contact area with the fan foundation 100. The extension portion can be fixed to the fan foundation 100 by welding or fastener connection.

Claims

1. A foundation reinforcement structure for a wind turbine generator set, comprising a wind turbine foundation (100), characterized in that: The invention also comprises a plurality of heat shrinkable reinforcement structures (200) fixed at the bottom of the fan foundation (100), wherein the heat shrinkable reinforcement structure (200) comprises a heat shrinkable sleeve (210), a concrete layer (220) and a reinforcement sleeve (230); the heat shrinkable sleeve (210) is vertically arranged and abuts against the fan foundation (100); the heat shrinkable sleeve (210) is a hollow cylinder with a cavity (240); and the end of the heat shrinkable sleeve (210) not abutting against the fan foundation (100) is a soft soil inlet end; the reinforcement sleeve (230) is sleeved outside the heat shrinkable sleeve (210) and is gap-matched with the heat shrinkable sleeve (210); and the concrete layer (220) is filled between the heat shrinkable sleeve (210) and the reinforcement sleeve (230).

2. The foundation reinforcement structure of a wind turbine generator set according to claim 1, characterized in that: The heat shrinkable tube (210) is a conical tube structure made of PET material, and the diameter of the end of the heat shrinkable tube (210) close to the fan base (100) is larger than the diameter of the end of the heat shrinkable tube (210) far from the fan base (100).

3. The foundation reinforcement structure of a wind turbine generator set according to claim 1, characterized in that: The reinforcement sleeve (230) is a circular sleeve structure formed by rolling up a steel sheet and welding the ends together. The end of the reinforcement sleeve (230) away from the fan foundation (100) is bent toward the heat shrinkable sleeve (210) and fixedly connected to the heat shrinkable sleeve (210) to form a sealed end at the bottom of the heat shrinkable reinforcement structure (200).

4. The foundation reinforcement structure of a wind turbine generator set according to claim 3, characterized in that: The end of the reinforcement sleeve (230) close to one end of the fan foundation (100) is bent in a direction away from the heat shrinkable sleeve (210), and the bent portion abuts against the fan foundation (100).

5. The foundation reinforcement structure of a wind turbine generator set according to any one of claims 1 to 4, characterized in that: The heat shrinkable reinforcement structures (200) are evenly arranged in an array below the fan foundation (100).

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