Land fan foundation transformation structure

Abstract

The invention discloses a land fan foundation transformation structure which comprises a cylindrical structure and a beam-shaped structure, and the cylindrical structure is used for being arranged on the periphery of the lower portion of an original fan foundation and fixedly connected with the original fan foundation; the beam-shaped structure comprises a plurality of connecting beams, the connecting beams are used for being arranged on the periphery of the upper portion of the original draught fan foundation, distributed in the circumferential direction of the original draught fan foundation at intervals and erected at the upper end of the cylindrical structure, and the connecting beams are fixedly connected with the original draught fan foundation and the cylindrical structure. Thus, the bearing area of the original fan foundation is increased by arranging the beam-shaped structure, the original fan foundation can bear large horizontal and vertical loads, the stability of the beam-shaped structure is guaranteed by arranging the cylindrical structure, the integrity, the stability and the safety of the fan foundation are improved, the structure is simple, the production cost is low, and the construction period is short.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation engineering, and in particular to a foundation reconstruction structure of an onshore wind turbine. Background Art

[0002] As the equipment of many old wind farms in my country has approached or exceeded the design service life, many problems have emerged. Due to the technical limitations of the early wind turbines, the capacity of the wind turbine units invested was relatively small, which made it impossible to fully utilize the wind energy resources. At the same time, there were many disadvantages such as high operation and maintenance costs and weak safety and stability. In addition, the requirements for wind power projects in various regions have been increasing year by year and environmental protection regulations have become increasingly stringent. The retirement and upgrading of old wind farms is imminent, and the primary problem in the upgrade of wind turbines is the treatment of the original wind turbine foundation. Summary of the invention

[0003] The main purpose of the present invention is to propose an onshore wind turbine foundation reconstruction structure, aiming at upgrading the existing old wind turbine foundation.

[0004] To achieve the above-mentioned purpose, the present invention proposes an onshore wind turbine foundation reconstruction structure, comprising:

[0005] A cylindrical structure, which is arranged on the outer periphery of the lower part of the original foundation of the fan and is fixedly connected to the original foundation of the fan; and

[0006] The beam-shaped structure includes a plurality of connecting beams, which are used to be arranged on the outer periphery of the upper part of the original foundation of the fan, and are distributed at intervals along the circumference of the original foundation of the fan, and are erected on the upper end of the cylindrical structure. Each of the connecting beams is fixedly connected to the original foundation of the fan and the cylindrical structure.

[0007] Optionally, one end of each of the connecting beams close to the original foundation of the wind turbine is fixedly connected to the upper part of the original foundation of the wind turbine using a plurality of first steel bars.

[0008] Optionally, the cylindrical structure is fixedly connected to the lower part of the original foundation of the wind turbine using a plurality of second steel bars.

[0009] Optionally, backfill soil is filled between the cylindrical structure and the original foundation of the wind turbine.

[0010] Optionally, each of the connecting beams is fixedly connected to the cylindrical structure by using a screw and a nut.

[0011] Optionally, the lower end of each screw rod is fixed in the cylindrical structure by an anchor.

[0012] Optionally, the cylindrical structure and the connecting beam are prefabricated parts respectively.

[0013] Optionally, an additional arm beam is provided on the lower side of each of the connecting beams, and the additional arm beam is fixedly connected to the cylindrical structure by using a plurality of third steel bars.

[0014] Optionally, one end of each of the connecting beams close to the original foundation of the wind turbine is fixedly connected to the upper part of the original foundation of the wind turbine by secondary concrete grouting;

[0015] The cylindrical structure is fixedly connected to the lower part of the original foundation of the fan by secondary concrete grouting.

[0016] Optionally, the cylindrical structure and the connecting beam are respectively cast on site and are respectively connected to the original foundation of the wind turbine by pouring concrete.

[0017] In the technical solution of the present invention, the bearing area of ​​the original foundation of the wind turbine is increased by arranging the beam-shaped structure, so that the original foundation of the wind turbine can withstand larger horizontal and vertical loads, and the stability of the beam-shaped structure is ensured by arranging the cylindrical structure, thereby improving the integrity, stability and safety of the wind turbine foundation. The structure is simple, the production cost is low, and the construction period is short. After the original foundation of the wind turbine is upgraded and reconstructed through the onshore wind turbine foundation reconstruction structure provided by the present invention, wind energy resources can be fully utilized and the power generation capacity can be greatly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 A structural schematic diagram of an embodiment of an onshore wind turbine foundation reconstruction structure provided by the present invention;

[0020] Figure 2 for Figure 1 A top view of the onshore wind turbine foundation reconstruction structure;

[0021] Figure 3 for Figure 1 Schematic diagram of part of the structure of the onshore wind turbine foundation modification.

[0022] Description of Figure Numbers:

[0023]

[0024]

[0025] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] As the equipment of many old wind farms in my country has approached or exceeded the design service life, many problems have emerged. Due to the technical limitations of the early wind turbines, the capacity of the wind turbine units invested was relatively small, which made it impossible to fully utilize the wind energy resources. At the same time, there were many disadvantages such as high operation and maintenance costs and weak safety and stability. In addition, the requirements for wind power projects in various regions have been increasing year by year and environmental protection regulations have become increasingly stringent. The retirement and upgrading of old wind farms is imminent, and the primary problem in the upgrade of wind turbines is the treatment of the original wind turbine foundation.

[0030] In view of this, the present invention provides an onshore wind turbine foundation modification structure 100. Figures 1 to 3 An embodiment of an onshore wind turbine foundation reconstruction structure 100 provided by the present invention.

[0031] See also Figures 1 to 3The onshore wind turbine foundation reconstruction structure 100 includes a cylindrical structure 1 and a beam structure. The cylindrical structure 1 is used to be arranged on the outer periphery of the lower part of the original wind turbine foundation 200 and is fixedly connected to the original wind turbine foundation 200; the beam structure includes a plurality of connecting beams 2. The plurality of connecting beams 2 are used to be arranged on the outer periphery of the upper part of the original wind turbine foundation 200 and are distributed at intervals along the circumference of the original wind turbine foundation 200 and are erected on the upper end of the cylindrical structure 1. Each of the connecting beams 2 is fixedly connected to the original wind turbine foundation 200 and the cylindrical structure 1.

[0032] In the technical solution of the present invention, the bearing area of ​​the original foundation 200 of the wind turbine is increased by setting the beam-shaped structure, so that the original foundation 200 of the wind turbine can withstand larger horizontal and vertical loads, and the stability of the beam-shaped structure is ensured by setting the cylindrical structure 1, thereby improving the integrity, stability and safety of the wind turbine foundation. The structure is simple, the production cost is low, and the construction period is short. After the original foundation 200 of the wind turbine is upgraded and reconstructed by the onshore wind turbine foundation reconstruction structure 100 provided by the present invention, wind energy resources can be fully utilized and the power generation capacity can be greatly increased.

[0033] It should be noted that, in the present invention, the number of the connecting beams 2 is not limited. For details, please refer to Figure 1 and Figure 2 In one embodiment of the present invention, eight connecting beams 2 are provided.

[0034] It should also be noted that, in the present invention, the original foundation 200 of the wind turbine is connected to the wind turbine tower via a prestressed anchor cage.

[0035] For further information, see Figure 1 The end of each connecting beam 2 close to the original foundation 200 of the wind turbine is fixedly connected to the upper part of the original foundation 200 of the wind turbine by a plurality of first steel bars 3, so as to realize the stable connection between the beam structure and the original foundation 200 of the wind turbine and stabilize the original foundation 200 of the wind turbine.

[0036] It should be noted that the original foundation 200 of the wind turbine has been subjected to the reinforcement planting treatment, that is, the first steel bars 3 are reserved.

[0037] For details, please refer to Figure 1 The cylindrical structure 1 is fixedly connected to the lower part of the original foundation 200 of the wind turbine by using a plurality of second steel bars 4, so as to achieve a stable connection between the cylindrical structure 1 and the original foundation 200 of the wind turbine.

[0038] It should be noted that the original foundation 200 of the wind turbine is subjected to the reinforcement planting treatment, that is, the second steel bars 4 are reserved.

[0039] For details, please refer to Figure 1, backfill soil 8 is filled between the cylindrical structure 1 and the original foundation 200 of the wind turbine. In this way, by filling and compacting the backfill soil 8 between the cylindrical structure 1 and the original foundation 200 of the wind turbine, the connection strength between the cylindrical structure 1 and the original foundation 200 of the wind turbine is improved.

[0040] For details, please refer to Figures 1 to 3 Each of the connecting beams 2 is fixedly connected to the cylindrical structure 1 by using a screw 5 and a nut 6 to achieve stability of the beam structure and the cylindrical structure 1.

[0041] For further information, see Figure 1 and Figure 3 The lower end of each screw rod 5 is fixed in the cylindrical structure 1 by an anchor, thereby strengthening the connection strength of the screw rod 5 and further improving the connection stability between the beam-shaped structure and the cylindrical structure 1.

[0042] Specifically, in one embodiment of the present invention, the cylindrical structure 1 and the connecting beam 2 are respectively prefabricated parts, which saves the on-site construction period.

[0043] For further information, see Figure 1 and Figure 3 A side beam 7 is provided at the lower side of each connecting beam 2 . The side beam 7 is fixedly connected to the cylindrical structure 1 by using a plurality of third steel bars to improve the stability of the connecting beam 2 .

[0044] Specifically, one end of each of the connection beams 2 close to the original foundation 200 of the wind turbine is fixedly connected to the upper part of the original foundation 200 of the wind turbine by secondary concrete grouting; and the cylindrical structure 1 is fixedly connected to the lower part of the original foundation 200 of the wind turbine by secondary concrete grouting. The connection strength between the cylindrical structure 1 and the beam structure and the original foundation 200 of the wind turbine is improved.

[0045] More specifically, both side walls of the connecting beam 2 and the upper part of the original foundation 200 of the fan are provided with grouting holes, and both side walls of the cylindrical structure 1 and the lower part of the original foundation 200 of the fan are provided with grouting holes.

[0046] Specifically, based on the above-mentioned embodiment of "an additional armpit beam 7 is provided on the lower side of each of the connecting beams 2, and the additional armpit beam 7 is fixedly connected to the cylindrical structure 1 by using a plurality of third steel bars", the additional armpit beam 7 and the cylindrical structure 1 are fixedly connected by secondary concrete grouting.

[0047] Specifically, in another embodiment of the present invention, the cylindrical structure 1 and the connecting beam 2 are respectively cast on site, and are respectively connected to the original foundation 200 of the wind turbine by pouring concrete.

[0048] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A land wind turbine foundation reconstruction structure, characterized in that: The onshore wind turbine foundation transformation structure comprises: A cylindrical structure, which is arranged on the outer periphery of the lower part of the original foundation of the fan and is fixedly connected to the original foundation of the fan; and The beam-shaped structure includes a plurality of connecting beams, which are used to be arranged on the outer periphery of the upper part of the original foundation of the fan, and are distributed at intervals along the circumference of the original foundation of the fan, and are erected on the upper end of the cylindrical structure. Each of the connecting beams is fixedly connected to the original foundation of the fan and the cylindrical structure.

2. The onshore wind turbine foundation modification structure according to claim 1, characterized in that: One end of each of the connection beams close to the original foundation of the wind turbine is fixedly connected to the upper part of the original foundation of the wind turbine by using a plurality of first steel bars.

3. The onshore wind turbine foundation reconstruction structure according to claim 1, characterized in that: The cylindrical structure is fixedly connected to the lower part of the original foundation of the fan by using a plurality of second steel bars.

4. The onshore wind turbine foundation reconstruction structure according to claim 1, characterized in that: Backfill soil is filled between the cylindrical structure and the original foundation of the fan.

5. The onshore wind turbine foundation reconstruction structure according to claim 1, characterized in that: Each of the connecting beams is fixedly connected to the cylindrical structure by using a screw and a nut.

6. The onshore wind turbine foundation reconstruction structure according to claim 5, characterized in that: The lower end of each screw rod is fixed in the cylindrical structure through an anchor.

7. The onshore wind turbine foundation reconstruction structure according to any one of claims 1 to 6, characterized in that: The cylindrical structure and the connecting beam are respectively prefabricated parts.

8. The onshore wind turbine foundation reconstruction structure according to claim 7, characterized in that: An additional haunch beam is provided at the lower side of each connecting beam, and the additional haunch beam is fixedly connected to the cylindrical structure by using a plurality of third steel bars.

9. The onshore wind turbine foundation reconstruction structure according to claim 7, characterized in that: One end of each of the connecting beams close to the original foundation of the fan is fixedly connected to the upper part of the original foundation of the fan by secondary concrete grouting; The cylindrical structure is fixedly connected to the lower part of the original foundation of the fan by secondary concrete grouting.

10. The onshore wind turbine foundation reconstruction structure according to any one of claims 1 to 6, characterized in that: The cylindrical structure and the connecting beam are respectively cast on site and are respectively connected to the original foundation of the fan by pouring concrete.

Images