Fan foundation reinforcing structure and fan assembly

Abstract

The utility model discloses a draught fan foundation reinforcing structure and a draught fan assembly, the draught fan foundation reinforcing structure comprises an old foundation, a foundation ring, a flange anchor plate and a plurality of anchor rods, the upper end of the foundation ring is provided with an upper flange located above the old foundation, and the upper flange is provided with a plurality of first connecting holes; the flange anchor plate is horizontally arranged and coaxially distributed at the upper end of the foundation ring, a plurality of second connecting holes are formed in the flange anchor plate, the second connecting holes and the first connecting holes are in one-to-one correspondence and are mutually aligned so as to be used for mounting a fan tower drum, the anchor rods are annularly distributed around the foundation ring at intervals, and the flange anchor plate is anchored with an old foundation through the anchor rods. In this way, the flange anchor plate can be additionally arranged on the original old foundation and the foundation ring, the flange anchor plate and the old foundation are reinforced through the anchor rod, the flange anchor plate and the upper flange are jointly connected with the fan tower barrel to achieve installation of the fan tower barrel on the old foundation, and therefore the cost is reasonably saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of wind power technology, especially relates to a fan foundation reinforcing structure and fan assembly. BACKGROUND

[0002] With the development of wind power, there are more and more technical improvement projects for old wind farms, and the implementation of technical improvement can effectively improve the power generation efficiency of wind turbine generators and help the capital increase of old wind farms. In the early development process of wind power, the wind speed of the selected site is generally good, and the technical improvement of old wind farms can reasonably utilize the wind farm with good wind speed, and the wind turbine generator with the latest technology can bring better benefits to the wind farm. In the past, the reinforcement design of the old wind farm foundation, in the face of the foundation ring type fan foundation, in the case that the foundation ring fatigue calculation does not meet the requirements, it is often troublesome to deal with or simply abandon the original fan foundation, and directly use the newly built fan foundation to meet the needs of the technical improvement project. However, considering the high cost and long construction period of the newly built fan foundation, the total investment of the technical improvement project is often too large, which affects the return on investment of the technical improvement project. SUMMARY

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a fan foundation reinforcing structure which is simple in structure, high in structural strength, and can install a new fan tower on the original old foundation and foundation ring.

[0004] In order to achieve the above purpose, the technical scheme of the utility model is as follows: a fan foundation reinforcing structure, comprising an old foundation and a foundation ring anchored on the upper end of the old foundation, the upper end of the foundation ring has an upper flange located above the old foundation, the upper flange has a plurality of first connecting holes, further comprising a flange anchor plate and a plurality of anchor rods, the flange anchor plate is horizontally arranged and coaxially distributed on the upper end of the foundation ring, the flange anchor plate has a plurality of second connecting holes, the plurality of second connecting holes correspond to and align with the plurality of first connecting holes, for installing a fan tower, the plurality of anchor rods are circumferentially spaced around the foundation ring, and the flange anchor plate is anchored with the old foundation through the plurality of anchor rods.

[0005] The beneficial effects of the above technical scheme are that: in this way, the flange anchor plate can be added between the original old foundation and the foundation ring, and the anchor rod can be used for reinforcement, and the flange anchor plate and the upper flange can be connected with the fan tower to realize the installation of the fan tower on the old foundation, and the old foundation and the foundation ring can be reused to realize the reasonable saving of cost.

[0006] The old foundation is provided with a plurality of anchor holes which are spaced apart around the foundation ring, the flange anchor plate is provided with a plurality of third connecting holes, the plurality of third connecting holes, the plurality of anchor holes and the plurality of anchor rods correspond to each other one by one, each anchor hole is aligned with the corresponding third connecting hole, the upper end of the anchor rod passes through the corresponding third connecting hole and is hung with the flange anchor plate, and the lower end of the anchor rod penetrates into the corresponding anchor hole and is provided with a filling sleeve in the anchor hole.

[0007] The beneficial effects of the above technical solution are that the lower end of the anchor rod can be more firmly anchored with the old foundation, and the upper end of the anchor rod has a better pulling effect on the flange anchor plate.

[0008] The lower end of the anchor rod has an enlarged head in the anchor hole.

[0009] The beneficial effects of the above technical solution are that by adding an enlarged head to the lower end of the anchor rod, the anchoring effect of the anchor rod in the anchor hole is better (the anti-loosening performance is better).

[0010] The upper end of the anchor rod is provided with external threads and at least one first nut is threadedly connected to the external threads, and the first nut is pressed against the upper end of the flange anchor plate.

[0011] The beneficial effects of the above technical solution are that the structure is simple, so the anchor rod can be pre-anchored on the old foundation, and then the flange anchor plate can be installed.

[0012] The above technical solution further includes a filling layer arranged between the old foundation and the flange.

[0013] The beneficial effects of the above technical solution are that the filling layer can wrap the part of the anchor rod exposed between the flange anchor plate and the old foundation, and the upper end of the filling layer can hold up the flange anchor plate, so that the installation effect of the flange anchor plate is better.

[0014] The filling layer and the filling sleeve are integrally formed.

[0015] The beneficial effects of the above technical solution are that the filling layer and the filling sleeve can be machined at the same time to pre-bury and install the anchor rod.

[0016] The filling layer and the filling sleeve are both concrete castings.

[0017] The beneficial effects of the above technical solution are that the filling layer and the filling sleeve have better fixing effect on the anchor rod after solidification.

[0018] In the above technical solution, an annular groove is provided at the upper end of the filling layer near the upper flange, and the annular groove is filled with a grouting layer.

[0019] The beneficial effect of the above technical solution is that it can further improve the structural strength of the contact point between the filling layer and the base ring.

[0020] A second object of the present invention is to provide a wind turbine assembly with a simple structure and in which old foundations and foundation rings can be reused on site to install a new wind turbine tower.

[0021] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a wind turbine assembly, including a wind turbine tower and the wind turbine foundation reinforcement structure as described above, the lower end of the wind turbine tower is provided with a lower flange, and the lower flange has a plurality of fourth connection holes, the plurality of the fourth connection holes, the plurality of the second connection holes and the plurality of the first connection holes correspond to each other and are aligned with each other, and a bolt is passed through each other through the first connection holes, the second connection holes and the fourth connection holes that are aligned with each other to bolt the lower flange, the flange anchor plate and the upper flange.

[0022] The beneficial effects of the above technical solution are: its structure is simple, and it can realize the reuse of old foundations and foundation rings in situ, thereby reducing the installation cost of new wind turbine towers.

[0023] The bolted connection member in the above technical solution includes a bolt and a second nut. The bolt passes through the corresponding first connection hole, second connection hole and fourth connection hole, and is tightened with at least one of the second nuts at its threaded end.

[0024] The beneficial effects of the above technical solution are: its structure is simple, and the installation effect between the upper flange, the lower flange and the flange anchor plate is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a cross-sectional view of a wind turbine foundation reinforcement structure according to an embodiment of the present utility model;

[0026] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0027] Figure 3 This is a cross-sectional view of the fan assembly according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of an assembly of the foundation ring, wind turbine tower, flange anchor plate and anchor rod described in an embodiment of the present utility model;

[0029] Figure 5 Schematic diagram of an explosion of the foundation ring, wind turbine tower, flange anchor plate and anchor rod in an embodiment of the present invention;

[0030] Figure 6 is a sectional view of another fan foundation reinforcing structure in the embodiment of the utility model;

[0031] Figure 7 is a sectional view of another fan assembly in the embodiment of the utility model;

[0032] Figure 8 is another assembly schematic view of the foundation ring, the fan tower, the flange anchor plate and the anchor rod in the embodiment of the utility model.

[0033] In the drawing: 1, fan foundation reinforcing structure; 11, old foundation; 111, anchor hole; 112, filling sleeve; 12, foundation ring; 121, upper flange; 1211, first connecting hole; 13, flange anchor plate; 131, second connecting hole; 132, third connecting hole; 14, anchor rod; 141, enlarged head; 142, first nut; 15, filling layer; 151, annular groove; 152, grouting layer; 2, fan tower; 21, lower flange; 211, fourth connecting hole; 3, bolted member; 31, bolt; 32, second nut. DETAILED DESCRIPTION

[0034] The principles and features of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and are not used to limit the scope of the utility model. In the following paragraphs, the utility model is described in more specific ways with examples in combination with the drawings. The advantages and features of the utility model will be more clearly described according to the following description and claims. It should be noted that the drawings are all very simplified and use non-precise proportions, and are only used to facilitate and clearly assist the purpose of explaining the embodiment of the utility model.

[0035] Embodiment 1

[0036] At present, the design life of the old foundation is usually 50 years, and the design life of the wind turbine is usually 20 years, so after the service life of the wind turbine reaches, the wind turbine can be removed, and a new wind turbine can be installed on the original old foundation, but in order to improve the stability of the installation of the new wind turbine, the foundation ring on the old foundation needs to be reinforced, such as Figure 1 and Figure 2As shown, to this end, the embodiment provides a fan foundation reinforcing structure, which comprises an old foundation 11 and a foundation ring 12 anchored at the upper end of the old foundation 11, the upper end of the foundation ring 12 has an upper flange 121 located above the old foundation 11, the upper flange 121 has a plurality of first connecting holes 1211, further comprising a flange anchor plate 13 and a plurality of anchor rods 14, the flange anchor plate 13 is horizontally arranged and coaxially distributed at the upper end of the foundation ring 12, the flange anchor plate 13 has a plurality of second connecting holes 131, a plurality of the second connecting holes 131 correspond to and align with a plurality of the first connecting holes 1211 one by one, for installing a fan tower, a plurality of the anchor rods 14 are circumferentially and spaced apart around the foundation ring 12, and the flange anchor plate 13 is anchored with the old foundation 11 through a plurality of the anchor rods 14, in this way, the flange anchor plate can be added between the original old foundation and the foundation ring, and the flange anchor plate and the upper flange are connected together with the fan tower to realize the installation of the fan tower on the old foundation, and the old foundation and the foundation ring are reused to realize reasonable cost saving (i.e. the reinforcement of the foundation ring is realized by adding the flange anchor plate).

[0037] As shown in Figure 1 and Figure 2 In the above technical solution, a plurality of anchor holes 111 are circumferentially and spaced apart on the old foundation 11 around the foundation ring 12, the flange anchor plate 13 has a plurality of third connecting holes 132, a plurality of the third connecting holes 132, a plurality of the anchor holes 111 and a plurality of the anchor rods 14 correspond to each other one by one, and each of the anchor holes 111 and the corresponding third connecting hole 132 align with each other, the upper end of the anchor rod 14 passes through the corresponding third connecting hole 132 and is hung with the flange anchor plate 13, and the lower end of the anchor rod 14 penetrates into the corresponding anchor hole 111 and is provided with a filling sleeve 112 in the anchor hole 111, so that the lower end of the anchor rod can be more firmly anchored with the old foundation, and the upper end of the anchor rod has a better pulling effect on the flange anchor plate.

[0038] In the embodiment, the flange anchor plate is a circular ring, which is similar to a flange ring, and the flange anchor plate and the upper flange are coaxially distributed and have an overlapping area therebetween. A preferred scheme is that, as shown in Figure 1 and Figure 2 The inner diameter of the flange anchor plate is equivalent to the inner diameter of the upper flange, and the outer diameter of the flange anchor plate is greater than the outer diameter of the upper flange, at this time, a plurality of the third connecting holes 132 are circumferentially and uniformly distributed at the outer edge of the flange anchor plate, and a plurality of the second connecting holes are circumferentially and spaced apart in the overlapping area of the flange anchor plate and the upper flange, when a plurality of the first connecting holes on the upper flange are distributed in two circles, at this time, a plurality of the second connecting holes on the flange anchor plate are also distributed in two circles; another preferred scheme is that, as shown inFigure 6 As shown in the drawings, the inner diameter of the flange anchor plate is smaller than the inner diameter of the upper flange, the outer diameter of the flange anchor plate is larger than the outer diameter of the upper flange, and a plurality of second connecting holes are arranged at the outer and inner edges of the flange anchor plate in the circumferential direction, so that the second connecting holes are arranged in two circles (and are located inside and outside the foundation ring, respectively), and the anchor holes on the old foundation are also arranged in two circles (one circle of anchor holes is located outside the foundation ring, and the other circle of anchor holes is located inside the foundation ring), and correspondingly, the anchor rods are arranged inside and outside the foundation ring.

[0039] As shown in the drawings, Figure 1 The lower end of the anchor rod 14 has an enlarged head 141 located in the anchor hole 111, so that the anchoring effect of the anchor rod in the anchor hole is better (the anti-loosening performance is better).

[0040] As shown in the drawings, Figure 1 and Figure 2 The upper end of the anchor rod 14 is provided with external threads and at least one first nut 142 is threadedly connected to the external threads, and the first nut 142 is pressed against the upper end of the flange anchor plate 13, which has a simple structure, so that the anchor rod can be pre-anchored on the old foundation, and then the flange anchor plate can be installed.

[0041] As shown in the drawings, Figure 1 The technical scheme further comprises a filling layer 15 arranged between the old foundation 11 and the upper flange 121, so that the filling layer can wrap the part of the anchor rod exposed between the flange anchor plate and the old foundation, and the upper end of the filling layer can support the flange anchor plate, so that the installation effect of the flange anchor plate is better.

[0042] Specifically, the filling layer 15 and the filling sleeve 112 are integrally formed, so that the filling layer and the filling sleeve can be machined at the same time to pre-install the anchor rod; the filling layer 15 and the filling sleeve 112 are both concrete castings, so that the fixing effect of the anchor rod after the filling layer and the filling sleeve are solidified is better; as shown in the drawings, Figure 1 The upper end of the filling layer 15 is recessed with a ring groove 151 near the position of the upper flange 121, and the ring groove 151 is filled with a grouting layer 152 (the material of the grouting layer is cement mortar), so that the structural strength of the contact part of the filling layer and the foundation ring can be further improved, and in addition, since the local bearing stress of the bottom of the upper flange is large, the grouting layer arranged at this position can resist the local bearing stress of the bottom of the upper flange, and the grouting layer is a secondary pouring, which is poured after the levelness of the upper flange is adjusted to ensure the levelness of the installation of the upper flange.

[0043] The filling layer in the embodiment can be considered as a newly added part on the old foundation, and the conventional practice is to arrange steel bars in the filling layer, and the concrete used for pouring is at least one strength grade higher than that used for the old foundation, and the conventional concrete is C40 or C45 type.

[0044] The conventional practice of the filling sleeve in the embodiment is to fill with C30 fine stone concrete, which can be completed before the filling layer.

[0045] As shown in Figures 3-5 and Figure 7 and Figure 8 The embodiment also provides a fan assembly, which comprises a fan tower 2 and the fan foundation reinforcing structure 1 as described in Embodiment 1, and the lower end of the fan tower 2 is provided with a lower flange 21, the lower flange 21 has a plurality of fourth connecting holes 211, the plurality of fourth connecting holes 211, the plurality of second connecting holes 131 and the plurality of first connecting holes 1211 are one-to-one corresponding and aligned with each other, and a bolted piece 3 is respectively passed through the first connecting hole 1211, the second connecting hole 131 and the fourth connecting hole 211 which are aligned with each other, so as to bolt the lower flange 21, the flange anchor plate 13 and the upper flange 121, which has a simple structure and can realize the in-situ reuse of the old foundation and the foundation ring, thereby reducing the installation cost of the new fan tower.

[0046] The bolted piece 3 in the above technical solution comprises a bolt 31 and a second nut 32, the bolt 31 passes through the corresponding first connecting hole 1211, second connecting hole 131 and fourth connecting hole 211, and at least one second nut 32 is tightened at the threaded end thereof, which has a simple structure and makes the installation effect between the upper flange, the lower flange and the flange anchor plate better.

[0047] Among them, Figure 1 , Figure 3 , Figure 6 and Figure 8 The dashed line L in the above technical solution represents the ground, wherein the old foundation is surrounded below the ground surface, and the filling layer and the grouting layer in the embodiment can be separately poured after the upper end of the new fan tower is installed on the foundation ring, so that the lower end of the bolt is embedded in the filling layer or the grouting layer, as shown in Figure 1 and Figure 3 When the flange anchor plate is provided with third connecting holes only at the outer edge, the filling layer is filled only outside the foundation ring at this time, and when the flange anchor plate is provided with third connecting holes at the inner edge and the outer edge, the filling layer needs to be filled outside and outside the ring of the foundation ring at this time, and the filling layer is also annular, and the part where the anchor rod is placed below the flange anchor plate is also embedded.

[0048] The horizontal position of the lower end of the anchor hole is lower than the horizontal position of the lower end of the foundation ring, and the anchor hole can be formed by using a pneumatic drill or a water drill.

[0049] In the embodiment, the anchor plate flange is additionally arranged, and the anchor plate flange is fixed on the old foundation through the anchor rod; at this time, the original foundation ring and the newly added anchor plate flange jointly serve as a new foundation ring for the installation of the fan tower drum (so that the structural strength of the foundation ring can be improved to meet the installation requirements of the new fan tower drum).

[0050] The above is only a preferred embodiment of the present application, and does not limit the present application in any form; any person skilled in the art can easily implement the present application according to the drawings and the above description; however, any equivalent changes, modifications and evolutions made by those skilled in the art within the scope of the technical scheme of the present application, using the disclosed technical content, are equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolutions made according to the essential technology of the present application are still within the protection scope of the technical scheme of the present application.

Claims

1. A fan foundation reinforcing structure comprising an old foundation (11) and a foundation ring (12) anchored to an upper end of the old foundation (11), an upper end of the foundation ring (12) having an upper flange (121) located above the old foundation (11), the upper flange (121) having a plurality of first connection holes (1211) formed therein, characterized in that, Further comprising a flange anchor plate (13) and a plurality of anchor rods (14), the flange anchor plate (13) is horizontally arranged and coaxially distributed on the upper end of the foundation ring (12), the flange anchor plate (13) has a plurality of second connecting holes (131) corresponding to the plurality of first connecting holes (1211) and aligned with each other for installing the fan tower, and the plurality of anchor rods (14) are circumferentially and spacedly distributed around the foundation ring (12), and the flange anchor plate (13) is anchored to the old foundation (11) through the plurality of anchor rods (14).

2. The fan foundation reinforcement structure according to claim 1, characterized by, The old foundation (11) has a plurality of anchor holes (111) circumferentially and spacedly arranged around the foundation ring (12), the flange anchor plate (13) has a plurality of third connecting holes (132), the plurality of third connecting holes (132), the plurality of anchor holes (111) and the plurality of anchor rods (14) correspond to each other one by one, and each anchor hole (111) is aligned with the corresponding third connecting hole (132), the upper end of the anchor rod (14) passes through the corresponding third connecting hole (132) and is hung to the flange anchor plate (13), and the lower end of the anchor rod (14) penetrates into the corresponding anchor hole (111) and is provided with a filling sleeve (112) in the anchor hole (111).

3. The fan foundation reinforcement structure according to claim 2, characterized by, The lower end of the anchor rod (14) has an enlarged head (141) located in the anchor hole (111).

4. The fan foundation reinforcement structure according to claim 2, characterized by, The upper end of the anchor rod (14) is provided with an external thread and at least one first nut (142) is threadedly connected at the external thread, and the first nut (142) is pressed against the upper end of the flange anchor plate (13).

5. The fan foundation reinforcement structure according to claim 2, wherein Further comprising a filling layer (15) arranged between the old foundation (11) and the upper flange (121).

6. The fan foundation reinforcement structure according to claim 5, characterized by The filling layer (15) and the filling sleeve (112) are integrally formed.

7. The fan foundation reinforcement structure according to claim 6, characterized in that, The filling layer (15) and the filling sleeve (112) are both concrete castings.

8. The fan foundation reinforcement structure according to claim 5, wherein The upper end of the filling layer (15) is recessed with a ring groove (151) near the position of the upper flange (121), and the ring groove (151) is filled with a grouting layer (152).

9. A fan assembly, comprising: The wind turbine foundation reinforcing structure (1) according to any one of claims 1-8, and a wind turbine tower (2) having a lower flange (21) provided at the lower end of the wind turbine tower (2), the lower flange (21) has a plurality of fourth connecting holes (211), the plurality of fourth connecting holes (211), the plurality of second connecting holes (131) and the plurality of first connecting holes (1211) correspond to each other one by one and are aligned with each other, and the first connecting holes (1211), the second connecting holes (131) and the fourth connecting holes (211) aligned with each other respectively pass through a bolted member (3) at the first connecting holes (1211), the second connecting holes (131) and the fourth connecting holes (211) to bolt the lower flange (21), the flange anchor plate (13) and the upper flange (121).

10. The fan assembly of claim 9, wherein, The bolted piece (3) comprises a bolt (31) and a second nut (32), the bolt (31) passes through the corresponding first connecting hole (1211), second connecting hole (131) and fourth connecting hole (211), and at least one second nut (32) is tightened at the threaded end thereof.

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