Concrete transition section and wind generating set

Abstract

The utility model provides a concrete transition section and a wind generating set, the concrete transition section comprises a concrete cylinder, an upper anchor plate, a lower anchor plate and an anchor bolt, the upper anchor plate is arranged on the top surface of the concrete cylinder, the lower anchor plate is arranged on the variable cross section of the concrete cylinder, and the anchor bolt is arranged on the top surface of the concrete cylinder. The upper anchor holes of the upper anchor plate, the main anchor holes of the concrete barrel and the lower anchor holes of the lower anchor plate are communicated in a one-to-one correspondence mode so that corresponding anchor bolts can penetrate through the upper anchor holes, the lower ends of the anchor bolts are connected with the lower anchor plate, and the upper ends of the anchor bolts are used for being connected with a wind power cabin. According to the concrete transition section, the upper anchor plate is arranged on the concrete cylinder and used for bearing the wind power cabin so as to ensure the flatness of the wind power cabin, the lower end of the anchor bolt is connected with the lower anchor plate, and the upper end of the anchor bolt is connected with the wind power cabin so as to ensure the stability of the wind power cabin; the concrete cylinder body is matched with the anchor bolts, so that the concrete transition section has certain compression resistance so as to bear the wind power cabin, and the safety performance is high.

Description

Technical Field

[0001] The utility model relates to the field of wind power, in particular to a concrete transition section and a wind power generator set. Background Art

[0002] The wind turbine generator set includes a tower, a nacelle and blades connected in sequence. In the related art, the concrete tower includes a concrete tower section, a steel transition section and a steel tower section arranged in sequence, and the nacelle is arranged on the steel transition section to ensure the flatness of the nacelle installation through the cooperation of the steel transition section and the steel tower section. However, the steel transition section and the steel tower section increase the structural complexity of the tower. At the same time, due to the problem of sudden stiffness change in the steel-concrete transition zone, the tower has certain safety hazards, and the concrete tower section needs to be larger in size. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the utility model proposes a concrete transition section, which is used to carry and install a wind turbine cabin to reduce the structural complexity and safety risks of the tower.

[0004] The embodiment of the utility model further provides a wind power generator set.

[0005] The concrete transition section of the utility model embodiment comprises:

[0006] A concrete cylinder, wherein the inner circumferential surface of the concrete cylinder has a variable cross section, the concrete cylinder is provided with a plurality of main anchor holes arranged at intervals along the circumference of the concrete cylinder, and the main anchor holes extend from the variable cross section to the top surface of the concrete cylinder;

[0007] An upper anchor plate, the upper anchor plate is arranged on the top surface of the concrete cylinder, the upper anchor plate is provided with a plurality of upper anchor holes corresponding to and connected with the plurality of main anchor holes, and the upper anchor plate is used to support the wind turbine cabin;

[0008] A lower anchor plate, the lower anchor plate being arranged on the variable cross-section of the concrete cylinder, the lower anchor plate being provided with a plurality of lower anchor holes corresponding to and connected with the plurality of main anchor holes one by one;

[0009] Anchor bolts, multiple anchor bolts are used to pass through multiple correspondingly connected upper anchor holes, main anchor holes and lower anchor holes one by one, the lower end of the anchor bolt is connected to the lower anchor plate, and the upper end of the anchor bolt is used to connect to the wind turbine cabin.

[0010] The concrete transition section of the utility model embodiment is provided with an upper anchor plate on the concrete cylinder for supporting the wind turbine cabin to ensure the flatness of the wind turbine cabin. A plurality of anchor bolts are passed through the upper anchor plate, the concrete cylinder and the lower anchor plate. The lower ends of the anchor bolts are connected to the lower anchor plate, and the upper ends of the anchor bolts are connected to the wind turbine cabin to ensure the stability of the wind turbine cabin. At the same time, the concrete cylinder is coordinated with the anchor bolts to ensure that the concrete transition section has a certain compressive resistance so as to be able to support the wind turbine cabin and has a higher safety performance.

[0011] In addition, the concrete transition section is used to cooperate with the concrete tower section to support the wind turbine cabin, avoiding the safety hazards caused by the steel-concrete transition zone, better controlling the overall displacement of the tower, and reducing the size of the concrete tower section to reduce the structural complexity and cost of the tower, and improve the supply chain delivery efficiency of the tower.

[0012] In some embodiments, the upper anchor plate is used to support a nacelle connection device of the wind turbine nacelle, and the top end of the anchor bolt is used to connect to the nacelle connection device of the wind turbine nacelle.

[0013] In some embodiments, the upper anchor plate is annular and extends along the circumference of the concrete cylinder, the lower anchor plate is annular and extends along the circumference of the concrete cylinder, the thickness of the upper anchor plate is greater than the thickness of the lower anchor plate, and the width of the upper anchor plate is greater than the width of the lower anchor plate.

[0014] In some embodiments, the anchor bolt includes an anchor rod and a nut, the anchor rod passes through the corresponding upper anchor hole, the main anchor hole and the lower anchor hole, the lower end of the anchor rod is provided with the nut, the nut abuts against the lower anchor plate, and the upper end of the anchor rod is provided with a thread, and the thread is used to connect the wind turbine cabin.

[0015] In some embodiments, the upper anchor plate is cast and fixed on the top surface of the concrete cylinder, and the lower anchor plate is cast and fixed on the variable cross-section of the concrete cylinder.

[0016] In some embodiments, the concrete cylinder is provided with a plurality of connection anchor holes arranged at intervals along the circumference of the concrete cylinder, the connection anchor holes penetrate the cylinder wall of the concrete cylinder along the axial direction of the concrete cylinder, and the connection anchor holes are used to set prestressed anchors.

[0017] In some embodiments, the concrete cylinder includes an outer cylinder section and an inner cylinder section, the inner cylinder section surrounds the inner circumference of the outer cylinder section, the top surface of the inner cylinder section is higher than the top surface of the outer cylinder section and forms the top surface of the concrete cylinder, the bottom surface of the inner cylinder section is higher than the bottom surface of the outer cylinder section and forms the variable cross-section of the concrete cylinder, and the connecting anchor hole is provided in the outer cylinder section and penetrates the outer cylinder section along the axial direction of the concrete cylinder.

[0018] In some embodiments, the inner circumferential surface of the outer cylinder segment has an inclined surface, the inclined surface is connected between the bottom surface of the outer cylinder segment and the variable cross-section, the inclined surface extends from bottom to top and is inclined toward the center line of the concrete cylinder.

[0019] In some embodiments, a first sleeve is cast and fixed in the wall of the inner barrel section, the first sleeve penetrates the wall of the inner barrel section along the axial direction of the inner barrel section, and the lumen of the first sleeve forms the main anchor hole.

[0020] In some embodiments, a second sleeve is cast and fixed inside the wall of the outer cylinder section, and the second sleeve penetrates the wall of the outer cylinder section along the axial direction of the outer cylinder section, and the lumen of the second sleeve forms the connecting anchor hole.

[0021] In some embodiments, the concrete cylinder includes a main body, a grouting layer and a leveling assembly, the grouting layer is arranged on the top of the main body, the upper anchor plate is arranged on the top surface of the grouting layer, the leveling assembly is arranged in the grouting layer and connected between the upper anchor plate and the main body, and a plurality of the leveling assemblies are arranged at intervals along the circumference of the concrete cylinder.

[0022] In some embodiments, the leveling assembly includes a base nut, an adjusting nut and a screw rod, wherein the screw rod extends axially along the concrete cylinder, the base nut is arranged on the screw rod and abuts against the top surface of the main body, the adjusting nut is arranged on the top of the screw rod and abuts against the bottom surface of the upper anchor plate, and at least the adjusting nut can move axially relative to the screw rod.

[0023] The wind turbine generator set of the utility model embodiment comprises:

[0024] Concrete tower sections, a plurality of said concrete tower sections are arranged in sequence along the vertical direction;

[0025] A concrete transition section, wherein the concrete transition section is any one of the above-mentioned concrete transition sections, and the concrete transition section is arranged on the concrete tower section at the top;

[0026] A prestressed anchor, the prestressed anchor extends in a vertical direction, the prestressed anchor is sequentially inserted into the wall surface of the concrete cylinder and the wall surfaces of a plurality of the concrete tower sections, or the prestressed anchor is sequentially inserted into the wall surface of the concrete cylinder and the inner cavity of a plurality of the concrete tower sections, and a plurality of the prestressed anchors are arranged at intervals along the circumference of the concrete tower section and the concrete transition section;

[0027] A wind turbine cabin is connected to the concrete transition section.

[0028] The wind turbine generator set in the embodiment of the utility model jointly supports the wind turbine cabin through the concrete tower section and the concrete transition section, and meets the prestressing requirements by tensioning the prestressed anchor, thereby ensuring that the concrete tower section and the concrete transition section have a certain compressive resistance, and ensuring the flatness and stability of the installation of the wind turbine cabin, so as to be able to carry the wind turbine cabin and have high safety performance. At the same time, the size of the concrete tower section can be reduced to reduce the structural complexity and cost of the tower. In addition, the wind turbine generator set can also achieve higher supply chain delivery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front cross-sectional view of a first embodiment of a concrete transition section of an embodiment of the utility model;

[0030] Figure 2 is a top view of a concrete transition section of an embodiment of the utility model;

[0031] Figure 3 is a front cross-sectional view of a second embodiment of the concrete transition section of the utility model embodiment;

[0032] Figure 4 It is a structural schematic diagram of the leveling assembly in the embodiment of the utility model;

[0033] Figure 5 It is a front cross-sectional view of a first embodiment of a wind turbine generator set according to an embodiment of the utility model;

[0034] Figure 6 It is a front cross-sectional view of a second embodiment of a wind turbine generator set according to the utility model.

[0035] Reference numerals:

[0036] 1. Concrete cylinder; 11. Variable section; 12. Outer cylinder section; 121. Inclined surface; 13. Inner cylinder section; 14. First casing; 15. Second casing; 16. Main body; 17. Grouting layer; 18. Leveling assembly; 181. Base nut; 182. Adjusting nut; 183. Screw; 2. Upper anchor plate; 3. Wind turbine cabin; 31. Cabin connection device; 4. Lower anchor plate; 5. Anchor bolt; 51. Anchor rod; 52. Bolt; 6. Prestressed anchor; 7. Concrete tower section. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0038] Reference below Figure 1-Figure 6The concrete transition section and the wind turbine generator set according to the embodiments of the utility model are described.

[0039] like Figure 1-Figure 6 As shown, the concrete transition section of the embodiment of the utility model includes a concrete cylinder 1, an upper anchor plate 2, a lower anchor plate 4 and an anchor bolt 5.

[0040] The inner circumferential surface of the concrete cylinder 1 has a variable cross-section 11, and the concrete cylinder 1 is provided with a plurality of main anchor holes arranged at intervals along the circumference of the concrete cylinder 1, and the main anchor holes extend from the variable cross-section 11 to the top surface of the concrete cylinder 1. The upper anchor plate 2 is provided on the top surface of the concrete cylinder 1, and the upper anchor plate 2 is provided with a plurality of upper anchor holes correspondingly connected to the plurality of main anchor holes, and the upper anchor plate 2 is used to carry the wind turbine cabin 3. The lower anchor plate 4 is provided on the variable cross-section 11 of the concrete cylinder 1, and the lower anchor plate 4 is provided with a plurality of lower anchor holes correspondingly connected to the plurality of main anchor holes. A plurality of anchor bolts 5 are used to pass through a plurality of correspondingly connected upper anchor holes, main anchor holes and lower anchor holes one by one, and the lower end of the anchor bolt 5 is connected to the lower anchor plate 4, and the upper end of the anchor bolt 5 is used to connect the wind turbine cabin 3.

[0041] Specifically, Figure 1-Figure 6 As shown, the concrete cylinder 1 is preferably cylindrical in the vertical direction, and the inner circumference of the concrete cylinder 1 has a variable cross-section 11, and the variable cross-section 11 is provided with a lower anchor plate 4, and the top surface of the concrete cylinder 1 is provided with an upper anchor plate 2, and the lower anchor plate 4 and the upper anchor plate 2 are arranged at intervals in the vertical direction, and the upper anchor plate 2 is used to support the wind turbine cabin 3.

[0042] The upper anchor plate 2 is provided with a plurality of upper anchor holes arranged at intervals along the circumference thereof, and the upper anchor holes penetrate the upper anchor plate 2 in the vertical direction. The concrete cylinder 1 is provided with a plurality of main anchor holes arranged at intervals along the circumference thereof, and the main anchor holes extend from the variable section 11 to the top surface of the concrete cylinder 1. The lower anchor plate 4 is provided with a plurality of lower anchor holes arranged at intervals along the circumference thereof, and the lower anchor holes penetrate the lower anchor plate 4 in the vertical direction. The plurality of upper anchor holes, the plurality of main anchor holes, and the plurality of lower anchor holes are connected in a one-to-one correspondence, and each group of connected upper anchor holes, main anchor holes, and lower anchor holes is penetrated with a corresponding anchor bolt 5, and the lower end of the anchor bolt 5 is connected to the lower anchor plate 4. Preferably, the lower end of the anchor bolt 5 is anchored to the lower anchor plate 4, and the upper end of the anchor bolt 5 extends above the upper anchor plate 2 and is used to connect the wind turbine cabin 3.

[0043] The concrete transition section of the utility model embodiment is provided with an upper anchor plate on the concrete cylinder for supporting the wind turbine cabin to ensure the flatness of the wind turbine cabin. A plurality of anchor bolts are passed through the upper anchor plate, the concrete cylinder and the lower anchor plate. The lower ends of the anchor bolts are connected to the lower anchor plate, and the upper ends of the anchor bolts are connected to the wind turbine cabin to ensure the stability of the wind turbine cabin. At the same time, the concrete cylinder is coordinated with the anchor bolts to ensure that the concrete transition section has a certain compressive resistance so as to be able to support the wind turbine cabin and has a higher safety performance.

[0044] In addition, the concrete transition section is used to cooperate with the concrete tower section to support the wind turbine cabin, avoiding the safety hazards caused by the steel-concrete transition zone, better controlling the overall displacement of the tower, and reducing the size of the concrete tower section to reduce the structural complexity and cost of the tower, and improve the supply chain delivery efficiency of the tower.

[0045] like Figure 5 As shown, the wind turbine nacelle 3 includes a nacelle and a nacelle connection device 31, the nacelle connection device 31 is located at the bottom of the nacelle and inside the nacelle, the upper anchor plate 2 is preferably used to carry the nacelle connection device 31 of the wind turbine nacelle 3 to ensure the flatness of the nacelle connection device 31, and the top end of the anchor bolt 5 is preferably used to connect the nacelle connection device 31 of the wind turbine nacelle 3 to ensure the stability of the nacelle connection device 31. The nacelle connection device 31 is preferably a nacelle yaw bearing.

[0046] Preferably, the concrete cylinder 1 is cast by ultra-high performance concrete. The strength and fatigue resistance of the ultra-high performance concrete are combined with the anchor bolts 5 to make the concrete cylinder 1 have strong compressive resistance, thereby ensuring that the wind turbine cabin 3 can be supported and the size of the concrete cylinder 1 can be reduced.

[0047] like Figure 1-Figure 3 As shown, the upper anchor plate 2 is annular, preferably circular, and extends along the circumference of the concrete cylinder 1. The lower anchor plate 4 is annular, preferably circular, and extends along the circumference of the concrete cylinder 1. The thickness of the upper anchor plate 2 in the vertical direction is greater than the thickness of the lower anchor plate 4 in the vertical direction, and the annular width of the upper anchor plate 2 is greater than the annular width of the lower anchor plate 4. Ensure the stability and flatness of the cabin connection device 31.

[0048] The upper anchor plate 2 is cast and fixed on the top surface of the concrete cylinder 1, preferably fixed on the top surface of the concrete cylinder 1. The lower anchor plate 4 is cast and fixed on the variable section 11 of the concrete cylinder 1, preferably fixed in the variable section 11, in other words, the lower anchor plate 4 is embedded in the variable section 11. This ensures that both the upper anchor plate 2 and the lower anchor plate 4 are firmly connected to the concrete cylinder 1.

[0049] like Figure 1 and Figure 3 As shown, the anchor bolt 5 includes an anchor rod 51 and a nut 52. The anchor rod 51 passes through the corresponding upper anchor hole, main anchor hole and lower anchor hole. The lower end of the anchor rod 51 is provided with a nut 52, which abuts against the lower anchor plate 4. The upper end of the anchor rod 51 is provided with a thread, which is used to connect the wind turbine cabin 3.

[0050] Specifically, the anchor rod 51 extends in the vertical direction and is provided with an external thread. Preferably, the external thread is provided at the upper and lower ends of the anchor rod 51. Each group of connected upper anchor holes, main anchor holes and lower anchor holes is penetrated with a corresponding anchor rod 51. The lower end of the anchor rod 51 extends to the lower side of the lower anchor plate 4 and is threadedly connected to the nut 52. The upper end surface of the nut 52 abuts against the lower end surface of the lower anchor plate 4. The upper end of the anchor rod 51 extends to the upper side of the upper anchor plate 2. The upper end of the anchor rod 51 is used to be threadedly connected to the wind turbine nacelle 3, preferably connected to the nacelle connection device 31 of the wind turbine nacelle 3, and more preferably connected to the nacelle yaw bearing of the wind turbine nacelle 3. Thereby, the connection stability of the wind turbine nacelle 3 is ensured.

[0051] Furthermore, a gasket may be passed through the lower end of the anchor rod 51 , and the gasket is located between the nut 52 and the lower anchor plate 4 .

[0052] like Figure 1-Figure 6 As shown, the concrete cylinder 1 is also provided with a plurality of connection anchor holes arranged at intervals along the circumference of the concrete cylinder 1 , the connection anchor holes penetrate the cylinder wall of the concrete cylinder 1 along the axial direction of the concrete cylinder 1 , and the connection anchor holes are used to set the prestressed anchor 6 .

[0053] Specifically, a plurality of main anchor holes are arranged at the inner circumferential end of the concrete cylinder 1, and a plurality of connecting anchor holes are arranged at the outer circumferential end of the concrete cylinder 1, and are arranged at intervals along the circumference of the concrete cylinder 1. The connecting anchor holes penetrate the cylinder wall of the concrete cylinder 1 in the vertical direction for inserting and connecting prestressed anchors 6. The concrete transition section is anchored and connected to the concrete tower section through the prestressed anchor 6, thereby ensuring the compressive resistance of the concrete transition section and the concrete tower section to cooperate with the bearing of the wind turbine cabin 3, and having higher safety performance.

[0054] Preferably, multiple main anchor holes are arranged at equal intervals along the circumference of the concrete cylinder 1, the number of connecting anchor holes is a multiple of four, and are arranged in multiple groups, each group of connecting anchor holes includes four adjacent connecting anchor holes, the four connecting anchor holes are arranged at equal intervals along the circumference of the concrete cylinder 1, multiple groups of connecting anchor holes are arranged at equal intervals along the circumference of the concrete cylinder 1, and the distance between two adjacent groups of connecting anchor holes is greater than the distance between two adjacent connecting anchor holes in each group.

[0055] like Figure 1 As shown, the concrete cylinder 1 includes an outer cylinder section 12 and an inner cylinder section 13 which are integrally cast and connected. The outer cylinder section 12 and the inner cylinder section 13 are preferably cylindrical. The inner cylinder section 13 surrounds the inner circumference of the outer cylinder section 12. In other words, the outer circumference of the inner cylinder section 13 is connected to the inner circumference of the outer cylinder section 12.

[0056] The top surface of the inner cylinder section 13 is higher than the top surface of the outer cylinder section 12, and the top surface of the inner cylinder section 13 forms the top surface of the concrete cylinder 1. The upper anchor plate 2 is arranged on the top surface of the inner cylinder section 13. Preferably, the width of the upper anchor plate 2 is consistent with the width of the inner cylinder section 13. The top surface of the outer cylinder section 12 forms a stepped surface on the outer circumferential surface of the concrete cylinder 1.

[0057] The bottom surface of the inner cylinder section 13 is higher than the bottom surface of the outer cylinder section 12. The bottom surface of the inner cylinder section 13 forms the variable section 11 of the concrete cylinder 1. The lower anchor plate 4 is arranged on the bottom surface of the inner cylinder section 13. Preferably, the width of the lower anchor plate 4 is smaller than the width of the inner cylinder section 13, and the annular center line of the lower anchor plate 4 coincides with the annular center line of the inner cylinder section 13.

[0058] A plurality of main anchor holes are provided in the inner barrel section 13 and are arranged at intervals along the circumference of the inner barrel section 13, and the main anchor holes vertically penetrate the inner barrel section 13. A plurality of connecting anchor holes are provided in the outer barrel section 12 and are arranged at intervals along the circumference of the outer barrel section 12, and the connecting anchor holes vertically penetrate the outer barrel section 12.

[0059] By setting an outer cylinder section and an inner cylinder section, and setting multiple main anchor holes in the inner cylinder section, and multiple connecting anchor holes in the outer cylinder section, it is convenient to install anchor bolts, prestressed anchors and wind turbine cabins to avoid interference, while also ensuring that the concrete transition section has a high compressive resistance.

[0060] like Figure 1 As shown, the inner circumference of the outer cylinder section 12 has an inclined surface 121, which is connected between the bottom surface of the outer cylinder section 12 and the variable section 11. The inclined surface 121 extends from bottom to top and is inclined toward the center line of the concrete cylinder 1. In other words, the inclined surface 121 is a conical surface that is narrow at the top and wide at the bottom. The top end of the inclined surface 121 is connected to the outer circumference end of the variable section 11, and the bottom end of the inclined surface 121 is connected to the inner circumference end of the bottom surface of the concrete cylinder 1.

[0061] The inclined surface ensures that the concrete cylinder has good structural stress, avoids stress concentration caused by sudden changes in cross-section, and facilitates demoulding during the production process of the concrete cylinder.

[0062] It is understood that the outer cylinder section 12 is not limited to having an inclined surface. Figure 6 In the illustrated embodiment, the radial thickness of the outer cylinder segment 12 is constant along the vertical direction, and the inner circumference of the outer cylinder segment 12 extends vertically and is connected to the variable cross-section 11 .

[0063] like Figure 1As shown, a cast-fixed first sleeve 14 is provided in the inner wall of the inner barrel section 13, and the first sleeve 14 penetrates the inner wall of the inner barrel section 13 along the axial direction of the inner barrel section 13. In other words, the first sleeve 14 penetrates the inner wall of the inner barrel section 13 along the vertical direction. A plurality of first sleeves 14 are arranged at intervals along the circumference of the inner barrel section 13, and a corresponding main anchor hole is formed in the lumen of each first sleeve 14 for passing the anchor rod 51, and guiding and protecting the anchor rod 51. The first sleeve 14 is preferably a PVC tube.

[0064] like Figure 1 As shown, a second sleeve 15 is cast and fixed inside the cylinder wall of the outer cylinder section 12, and the second sleeve 15 penetrates the cylinder wall of the outer cylinder section 12 along the axial direction of the outer cylinder section 12. In other words, the second sleeve 15 penetrates the cylinder wall of the outer cylinder section 12 along the vertical direction. A plurality of second sleeves 15 are arranged at intervals along the circumference of the outer cylinder section 12, and a corresponding connecting anchor hole is formed in the lumen of each second sleeve 15 for passing the prestressed anchor 6, and plays a role in guiding and protecting the prestressed anchor 6. The second sleeve 15 is preferably a prestressed corrugated tube.

[0065] In such Figure 3 In the illustrated embodiment, the concrete cylinder 1 includes a main body 16, a grouting layer 17 and a leveling assembly 18. The grouting layer 17 is disposed on the top of the main body 16, the upper anchor plate 2 is disposed on the top surface of the grouting layer 17, the leveling assembly 18 is disposed in the grouting layer 17 and connected between the upper anchor plate 2 and the main body 16, and a plurality of leveling assemblies 18 are arranged at intervals along the circumference of the concrete cylinder 1.

[0066] like Figure 3 As shown, the inner cylinder section 13 includes a main body and a grouting layer 17. The grouting layer 17 is arranged on the top of the main body of the inner cylinder section 13 and is in a ring shape around the vertical direction. The main body of the inner cylinder section 13 and the outer cylinder section 12 are preferably integrally cast and connected to form a main body 16. Therefore, the grouting layer 17 is arranged on the top of the main body 16, and the upper anchor plate 2 is arranged on the top surface of the grouting layer 17.

[0067] A plurality of leveling components 18 are arranged in the grouting layer 17, and the plurality of leveling components 18 are arranged at intervals along the circumference of the concrete cylinder 1. In other words, the plurality of leveling components 18 are arranged at intervals along the circumference of the grouting layer 17. Each leveling component 18 is connected between the upper anchor plate 2 and the main body 16 to drive the upper anchor plate 2 to move in the vertical direction relative to the main body 16, so that the flatness of the upper anchor plate 2 is adjusted by the plurality of leveling components 18 to ensure that the flatness of the upper anchor plate 2 meets the installation requirements of the wind turbine cabin 3.

[0068] It should be noted that the main body 16 is first cast and formed, and then a plurality of leveling components 18 are arranged on the main body 16 and leveled, and the upper anchor plate 2 is installed, and then the grouting layer 17 is cast. Therefore, the plurality of leveling components 18 are cast and fixed inside the grouting layer 17, and the upper anchor plate 2 is cast and fixed on the top surface of the grouting layer 17. After the grouting layer 17 is cast and formed, the leveling components 18 cannot adjust the upper anchor plate 2 again.

[0069] like Figure 4 As shown, the leveling assembly 18 includes a base nut 181, an adjusting nut 182 and a screw 183. The screw 183 extends along the axial direction of the concrete cylinder 1. The base nut 181 is arranged on the screw 183 and abuts against the top surface of the main body 16. The adjusting nut 182 is arranged on the top of the screw 183 and abuts against the bottom surface of the upper anchor plate 2. At least the adjusting nut 182 can move along the axial direction of the screw 183 relative to the screw 183.

[0070] Specifically, the screw rod 183 extends in the vertical direction, the bottom of the screw rod 183 is threadedly connected to the base nut 181, and the top of the screw rod 183 is threadedly connected to the adjusting nut 182. The base nut 181 and the adjusting nut 182 can move in the vertical direction relative to the screw rod 183. The base nut 181 is abutted against the top surface of the main body 16, so the bottom of the screw rod 183 cannot extend below the base nut 181, and the top surface of the adjusting nut 182 abuts against the bottom surface of the upper anchor plate 2, so the top of the screw rod 183 cannot extend above the adjusting nut 182. The base nut 181 and the adjusting nut 182 are preferably fine-threaded nuts.

[0071] When adjusting the leveling assembly 18, the height position of the adjusting nut 182 relative to the screw rod 183 is changed by rotating the adjusting nut 182, thereby adjusting the upper anchor plate 2 to move in the vertical direction relative to the main body 16. When the adjusting nut 182 cannot adjust the upper anchor plate 2 to the right position, the base nut 181 may be further rotated to change the height position of the base nut 181 relative to the screw rod 183, and further adjusting the upper anchor plate 2 to move in the vertical direction relative to the main body 16 to ensure the flatness of the upper anchor plate 2.

[0072] The embodiments of the present utility model also provide two production processes for the concrete transition section.

[0073] Among them, the first production process for the concrete transition section includes placing the upper anchor plate 2 in an inverted casting mold and abutting against the bottom surface of the inverted casting mold, and the bottom surface of the inverted casting mold has a certain flatness. Concrete is poured in the inverted casting mold to form a concrete cylinder 1, and the lower anchor plate 4 is placed during or before the pouring process.

[0074] Specifically, the first production process for the concrete transition section is used to produce Figure 1The concrete transition section shown. First, an inverted casting mold is set up, and it is ensured that the bottom surface of the inverted casting mold has a certain degree of flatness, and then the upper anchor plate 2 and the lower anchor plate 4 are placed in the inverted casting mold, and the upper anchor plate 2 is abutted against the bottom surface of the inverted casting mold to ensure the flatness of the upper anchor plate 2 through the bottom surface of the inverted casting mold. Concrete is poured in the inverted casting mold to form an inverted concrete cylinder 1, and the upper anchor plate 2 and the lower anchor plate 4 are cast and fixed to the concrete cylinder 1. After the inverted concrete cylinder 1 is cast and formed, the upper anchor plate 2, the inverted concrete cylinder 1 and the lower anchor plate 4 are demoulded, and then the inverted concrete cylinder 1 is turned over to a normal state.

[0075] It can be understood that the lower anchor plate is not limited to being placed in the inverted casting mold before casting. In other embodiments, the lower anchor plate is placed during the casting process.

[0076] The first production process for the concrete transition section of the utility model embodiment is to cast the concrete transition section in an inverted posture through an inverted casting mold, and to ensure the flatness of the upper anchor plate by abutting the bottom surface of the inverted casting mold against the upper anchor plate, thereby ensuring the flatness of the concrete transition section for installing the wind turbine cabin.

[0077] Furthermore, while placing the upper anchor plate 2 in the inverted casting mold, a plurality of first sleeves 14 and a plurality of second sleeves 15 are placed in the inverted casting mold, and then concrete is poured into the inverted casting mold.

[0078] Preferably, the anchor bolts 5 and the prestressed anchors 6 are installed during the hoisting of the concrete transition section.

[0079] The second production process for the concrete transition section includes placing the lower anchor plate 4 in an upright casting mold. Casting concrete in the upright casting mold to form a main body 16. Arranging a plurality of leveling components 18 on the top surface of the main body 16 and leveling. Placing the upper anchor plate 2 on the plurality of leveling components 18. Arranging a grouting template between the top surface of the main body 16 and the upper anchor plate 2. Casting grouting material in the grouting template to form a grouting layer 17.

[0080] Specifically, the second production process for the concrete transition section is used to produce Figure 3 First, an upright casting mold is set, and the lower anchor plate 4 is placed in the upright casting mold, and then concrete is poured into the upright casting mold to form an upright main body 16, and the lower anchor plate 4 is cast and fixed on the variable section 11 of the main body 16, and then the lower anchor plate 4 and the main body 16 are demoulded.

[0081] After the lower anchor plate 4 and the main body 16 are demoulded, a plurality of leveling components 18 are arranged on the top surface of the main body 16 at intervals along the circumference of the main body 16, and the plurality of leveling components 18 are leveled, and then the upper anchor plate 2 is placed on the plurality of leveling components 18, and a grouting template is arranged between the top surface of the main body 16 and the upper anchor plate 2, and grouting material is poured into the space surrounded by the top surface of the main body 16, the upper anchor plate 2 and the grouting template to form a grouting layer 17, and the main body 16, the grouting layer 17 and the upper anchor plate 2 are cast and fixedly connected. After the grouting layer 17 is cast and formed, the grouting template is removed.

[0082] The embodiment of the utility model is used for the production process of the concrete transition section, which casts the main body and the grouting layer of the concrete cylinder in sequence, and before casting the grouting layer, adjusts multiple leveling components located on the main body to ensure that the upper anchor plate has a certain flatness, and then casts the grouting layer to maintain a certain flatness of the upper anchor plate, thereby ensuring the flatness of the concrete transition section for installing the wind turbine cabin.

[0083] Furthermore, while placing the lower anchor plate 4 in the upright casting mold, a plurality of first sleeves 14 and a plurality of second sleeves 15 are placed in the upright casting mold, and then concrete is poured into the upright casting mold.

[0084] Preferably, the anchor bolts 5 and the prestressed anchors 6 are installed during the hoisting of the concrete transition section.

[0085] like Figure 1-Figure 6 As shown, the wind turbine generator set of the embodiment of the utility model includes a concrete tower section 7, a concrete transition section, a prestressed anchor 6 and a wind turbine cabin 3.

[0086] Multiple concrete tower sections 7 are arranged in sequence along the vertical direction. The concrete transition section is the concrete transition section of the embodiment of the utility model, and the concrete transition section is arranged on the concrete tower section 7 located at the top. The prestressed anchor 6 extends in the vertical direction, and the prestressed anchor 6 is sequentially penetrated through the wall surface of the concrete cylinder 1 and the wall surfaces of multiple concrete tower sections 7, or the prestressed anchor 6 is sequentially penetrated through the wall surface of the concrete cylinder 1 and the inner cavity of multiple concrete tower sections 7, and multiple prestressed anchors 6 are arranged at intervals along the circumference of the concrete tower section 7 and the concrete transition section. The wind turbine cabin 3 is connected to the concrete transition section.

[0087] Specifically, Figure 5 As shown, multiple concrete tower sections 7 are arranged in sequence along the vertical direction, and a concrete transition section is provided on the top concrete tower section 7, and a wind turbine cabin 3 is provided on the concrete transition section. Preferably, a cabin connection device 31 of the wind turbine cabin 3 is carried on the upper anchor plate 2 and is connected to the top ends of multiple anchor bolts 5.

[0088] The concrete tower section 7 is provided with a plurality of tower anchor holes, which penetrate the concrete tower section 7 in the vertical direction. The plurality of tower anchor holes are arranged at intervals along the circumference of the concrete tower section 7, and are connected one-to-one with the plurality of connecting anchor holes of the concrete transition section. The connecting anchor holes and the plurality of tower anchor holes connected in the vertical direction are penetrated with corresponding prestressed anchors 6, so that the concrete transition section and the plurality of concrete tower sections 7 are anchored and connected by the plurality of prestressed anchors 6.

[0089] Preferably, a second sleeve is cast and fixed in the wall of the concrete tower section 7, and the second sleeve penetrates the wall of the concrete tower section 7 in the vertical direction. A plurality of the second sleeves are arranged at intervals along the circumference of the concrete tower section 7, and the tube cavities of the second sleeves form corresponding tower anchor holes for inserting the prestressed anchor 6.

[0090] It can be understood that the prestressed anchor 6 is not limited to being sequentially penetrated into the wall surface of the concrete cylinder 1 and the wall surfaces of the plurality of concrete tower sections 7 .

[0091] In such Figure 6 In the illustrated embodiment, the prestressed anchors 6 are sequentially inserted into the wall surface of the concrete cylinder 1 and the inner cavities of a plurality of concrete tower sections 7 .

[0092] Specifically, the radial thickness of the outer cylinder segment 12 is constant in the vertical direction and is greater than the radial thickness of the concrete tower segment 7. The outer peripheral end of the outer cylinder segment 12 is arranged on the topmost concrete tower segment 7, and the inner peripheral end of the outer cylinder segment 12 is suspended and penetrated with a plurality of prestressed anchors 6. Therefore, the prestressed anchors 6 and the concrete tower segment 7 are offset in the horizontal plane. The prestressed anchor 6 is first anchored at the top of the concrete cylinder 1, specifically at the top surface of the outer cylinder segment 12, and then penetrated into the connecting anchor hole of the concrete cylinder 1, and then penetrated through the inner cavity of a plurality of concrete tower segments 7. At this time, the concrete tower segment 7 may not be provided with a tower anchor hole.

[0093] Preferably, the topmost concrete tower section 7 is a variable diameter section, and the remaining concrete tower sections 7 are straight tower sections. The cylinder wall of the straight tower section extends in the vertical direction, and the radial thickness of the straight tower section and the variable diameter section is constant in the up and down direction. The cylinder wall of the variable diameter section extends in the direction from bottom to top and is inclined toward the center line of the variable diameter section. The variable diameter section is connected between the straight tower section and the outer peripheral end of the outer cylinder section 12.

[0094] It is understandable that the topmost concrete tower section is not limited to being a variable diameter section. In other embodiments, all concrete tower sections are straight tower sections, or at least part of the concrete tower sections are straight cone straight tower sections.

[0095] The wind turbine generator set in the embodiment of the utility model jointly supports the wind turbine cabin through the concrete tower section and the concrete transition section, and meets the prestressing requirements by tensioning the prestressed anchor, thereby ensuring that the concrete tower section and the concrete transition section have a certain compressive resistance, and ensuring the flatness and stability of the installation of the wind turbine cabin, so as to be able to carry the wind turbine cabin and have high safety performance. At the same time, the size of the concrete tower section can be reduced to reduce the structural complexity and cost of the tower. In addition, the wind turbine generator set can also achieve higher supply chain delivery efficiency.

[0096] Furthermore, the top surfaces of at least two concrete tower sections 7 at the upper end are provided with leveling pads for leveling.

[0097] The construction process for a wind turbine generator set of the utility model embodiment includes sequentially hoisting a plurality of concrete tower sections 7. Hoisting and casting the connected upper anchor plate 2, concrete cylinder 1 and lower anchor plate 4. Inserting and tensioning a plurality of prestressed anchors 6. Hoisting a wind turbine cabin 3. Inserting and tensioning a plurality of anchor bolts 5, and the tops of the anchor bolts 5 are connected to the wind turbine cabin 3.

[0098] Specifically, first, multiple concrete tower sections 7 are hoisted in sequence along the vertical direction so that the multiple concrete tower sections 7 are arranged in sequence along the vertical direction. Preferably, in at least two concrete tower sections 7 at the upper end, each concrete tower section 7 is leveled by leveling gaskets after hoisting.

[0099] The upper anchor plate 2, concrete cylinder 1 and lower anchor plate 4 connected by casting are hoisted and placed on the topmost concrete tower section 7, and then multiple prestressed anchors 6 are inserted and tensioned in the wall surface of the concrete cylinder 1 and the wall surfaces of multiple concrete tower sections 7, or multiple prestressed anchors 6 are inserted and tensioned in the wall surface of the concrete cylinder 1 and the inner cavity of multiple concrete tower sections 7. The prestressed anchors 6 are subjected to anti-corrosion and sealing treatment.

[0100] The wind turbine nacelle 3 is hoisted and placed on the upper anchor plate 2, the concrete cylinder 1 and the lower anchor plate 4 which are cast in connection, and the nacelle connection device 31 of the wind turbine nacelle 3 is carried on the upper anchor plate 2 and is in reliable contact.

[0101] A plurality of anchor bolts 5 are inserted through the upper anchor plate 2, the concrete cylinder 1 and the lower anchor plate 4 which are connected by pouring, and the upper ends of the plurality of anchor bolts 5 are connected to the cabin connection device 31 of the wind turbine cabin 3, and then the plurality of anchor bolts 5 are tensioned and fixed. Preferably, the anchor rod 51 is inserted upward from the lower anchor hole, and the upper end of the anchor rod 51 is threadedly connected to the cabin connection device 31, and then tensioned by direct tensioning method, and the nut 52 is tightened, so that the lower anchor plate 4 also plays a role in positioning the anchor rod 51. The anchor bolt 5 is subjected to anti-corrosion and sealing treatment.

[0102] The construction process for the wind turbine generator set of the embodiment of the utility model can ensure the smooth installation of the wind turbine generator set, ensure the safety of the wind turbine generator set, and ensure the flatness and stability of the wind turbine cabin installation. At the same time, since the components to be hoisted are the concrete tower section, the concrete transition section and the wind turbine cabin, the types of hoisting components are relatively small, and the concrete tower section and the concrete transition section are both made of concrete casting, the types and number of hoisting tools can be effectively reduced, so that the construction process has lower complexity and higher construction efficiency.

[0103] In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0104] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0105] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0106] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0107] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A concrete transition section, characterized in that: include: A concrete cylinder, wherein the inner circumferential surface of the concrete cylinder has a variable cross section, the concrete cylinder is provided with a plurality of main anchor holes arranged at intervals along the circumference of the concrete cylinder, and the main anchor holes extend from the variable cross section to the top surface of the concrete cylinder; An upper anchor plate, the upper anchor plate is arranged on the top surface of the concrete cylinder, the upper anchor plate is provided with a plurality of upper anchor holes corresponding to and connected with the plurality of main anchor holes, and the upper anchor plate is used to support the wind turbine cabin; A lower anchor plate, the lower anchor plate being arranged on the variable cross-section of the concrete cylinder, the lower anchor plate being provided with a plurality of lower anchor holes corresponding to and connected with the plurality of main anchor holes one by one; Anchor bolts, multiple anchor bolts are used to pass through multiple correspondingly connected upper anchor holes, main anchor holes and lower anchor holes one by one, the lower end of the anchor bolt is connected to the lower anchor plate, and the upper end of the anchor bolt is used to connect to the wind turbine cabin.

2. The concrete transition section according to claim 1, characterized in that: The upper anchor plate is used to bear the cabin connection device of the wind turbine cabin, and the top end of the anchor bolt is used to connect the cabin connection device of the wind turbine cabin.

3. The concrete transition section according to claim 1, characterized in that: The upper anchor plate is annular and extends along the circumference of the concrete cylinder, the lower anchor plate is annular and extends along the circumference of the concrete cylinder, the thickness of the upper anchor plate is greater than the thickness of the lower anchor plate, and the width of the upper anchor plate is greater than the width of the lower anchor plate.

4. The concrete transition section according to claim 1, characterized in that: The anchor bolt includes an anchor rod and a nut. The anchor rod passes through the corresponding upper anchor hole, the main anchor hole and the lower anchor hole. The lower end of the anchor rod is provided with the nut, which abuts against the lower anchor plate. The upper end of the anchor rod is provided with a thread, which is used to connect the wind turbine cabin.

5. The concrete transition section according to claim 1, characterized in that: The upper anchor plate is cast and fixed on the top surface of the concrete cylinder, and the lower anchor plate is cast and fixed on the variable cross-section of the concrete cylinder.

6. The concrete transition section according to claim 1, characterized in that: The concrete cylinder is provided with a plurality of connection anchor holes which are arranged at intervals along the circumference of the concrete cylinder. The connection anchor holes penetrate the cylinder wall of the concrete cylinder along the axial direction of the concrete cylinder. The connection anchor holes are used to set prestressed anchors.

7. The concrete transition section according to claim 6, characterized in that: The concrete cylinder includes an outer cylinder section and an inner cylinder section, the inner cylinder section surrounds the inner circumference of the outer cylinder section, the top surface of the inner cylinder section is higher than the top surface of the outer cylinder section and forms the top surface of the concrete cylinder, the bottom surface of the inner cylinder section is higher than the bottom surface of the outer cylinder section and forms the variable cross-section of the concrete cylinder, and the connecting anchor hole is arranged in the outer cylinder section and penetrates the outer cylinder section along the axial direction of the concrete cylinder.

8. The concrete transition section according to claim 7, characterized in that: The inner circumference of the outer cylinder section has an inclined surface, the inclined surface is connected between the bottom surface of the outer cylinder section and the variable cross section, the inclined surface extends from bottom to top and is inclined toward the center line of the concrete cylinder.

9. The concrete transition section according to claim 7, characterized in that: A first sleeve is cast and fixed in the inner wall of the inner cylinder section. The first sleeve penetrates the inner wall of the inner cylinder section along the axial direction of the inner cylinder section, and the lumen of the first sleeve forms the main anchor hole.

10. The concrete transition section according to claim 7, characterized in that: A second sleeve is cast and fixed inside the cylinder wall of the outer cylinder section. The second sleeve penetrates the cylinder wall of the outer cylinder section along the axial direction of the outer cylinder section, and the tube cavity of the second sleeve forms the connecting anchor hole.

11. The concrete transition section according to claim 1, characterized in that: The concrete cylinder includes a main body, a grouting layer and a leveling assembly. The grouting layer is arranged on the top of the main body, the upper anchor plate is arranged on the top surface of the grouting layer, the leveling assembly is arranged in the grouting layer and connected between the upper anchor plate and the main body, and a plurality of the leveling assemblies are arranged at intervals along the circumference of the concrete cylinder.

12. The concrete transition section according to claim 11, characterized in that: The leveling assembly includes a base nut, an adjusting nut and a screw rod, wherein the screw rod extends along the axial direction of the concrete cylinder, the base nut is arranged on the screw rod and abuts against the top surface of the main body, the adjusting nut is arranged on the top of the screw rod and abuts against the bottom surface of the upper anchor plate, and at least the adjusting nut can move along the axial direction of the screw rod relative to the screw rod.

13. A wind turbine generator set, characterized in that: include: Concrete tower sections, a plurality of said concrete tower sections are arranged in sequence along the vertical direction; A concrete transition section, wherein the concrete transition section is the concrete transition section according to any one of claims 1 to 12, and the concrete transition section is arranged on the concrete tower section located at the top; A prestressed anchor, the prestressed anchor extends in a vertical direction, the prestressed anchor is sequentially inserted into the wall surface of the concrete cylinder and the wall surfaces of a plurality of the concrete tower sections, or the prestressed anchor is sequentially inserted into the wall surface of the concrete cylinder and the inner cavity of a plurality of the concrete tower sections, and a plurality of the prestressed anchors are arranged at intervals along the circumference of the concrete tower section and the concrete transition section; A wind turbine cabin is connected to the concrete transition section.

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