Fabricated transition section structure and framework type wind power tower

Abstract

The utility model relates to an assembly type transition section structure and a framework type wind power tower. The transition section structure comprises four split structures of the same structure, and the four split structures are mutually assembled; each split structure comprises a cast steel pipe, a transition section side plate, a transition section cone plate and a flat plate connecting part; the bottom end of the transition section cone plate is connected with the cast steel pipe, and the top end of the transition section cone plate is fixedly provided with a segmented flange; the transition section side plates are arranged on the two sides of the cast steel pipe, and the top ends of the transition section side plates are connected with the transition section conical plate. Each flat plate connecting part is arranged at the splicing position of the transition section cone plate and the transition section side plate in every two adjacent split structures and connected and fixed through bolts. And a cast steel flange is arranged at the bottom end of the cast steel pipe. Compared with an integral transition section, the assembly type transition section structure is convenient to transport, bolts are used for assembly and connection on site, the construction speed is high, the assembly efficiency is high, and the quality is easy to guarantee.

Description

Technical Field

[0001] The present application relates to the technical field of wind power towers, and in particular to an assembled transition section structure and a frame-type wind power tower. Background Art

[0002] With the development of tall steel structures and wind power towers, frame-type steel structure towers are often used to improve the utilization rate of lower materials and overall stiffness of tall steel structures, especially wind power towers, which have significant fatigue effects under wind loads and mechanical operation.

[0003] The lower part of the above-mentioned frame-type steel structure tower is a steel tower frame, and the upper part is a steel tower tube. The tower frame and the tower tube are connected by using a transition section. At present, the transition section is an integral structure. The transition section of the integral structure is not convenient for transportation and requires welding on site, which has low construction efficiency.

[0004] Therefore, there is an urgent need to provide an assembled transition section structure and a frame-type wind power tower to solve the above-mentioned technical problems. Utility Model Content

[0005] Based on this, an assembled transition section structure and a frame-type wind turbine tower are provided. Compared with the integral transition section, the assembled transition section structure is convenient to transport and can be assembled and connected on site using bolts, with fast construction speed, high assembly efficiency, and easy quality assurance.

[0006] On the one hand, an assembled transition section structure is provided, comprising: four segmented structures with the same structure, which are assembled with each other; each segmented structure comprises a cast steel pipe, a transition section side plate, a transition section cone plate, and a flat plate connecting portion; the bottom end of the transition section cone plate is connected to the cast steel pipe, and the top end of the transition section cone plate is fixedly installed with a segmented flange; the transition section side plates are arranged on both sides of the cast steel pipe, and the top end of the transition section side plates is connected to the transition section cone plate; the flat plate connecting portion is arranged at the joint of the transition section cone plate and the transition section side plates in two adjacent segmented structures and is connected and fixed by bolts; the bottom end of the cast steel pipe is provided with a cast steel flange.

[0007] An optional solution is to further include an integrally arranged transition section flange connecting ring, wherein the transition section flange connecting ring fixedly connects the segmented flanges in the four segmented structures.

[0008] An optional solution is that the flat plate connecting part includes an upper connecting part, a middle connecting part and a lower connecting part; the upper connecting part is used to connect the joints of two adjacent transition section cone plates; the middle connecting part is used to connect the upper and middle joints of two adjacent transition section side plates; and the lower connecting part is used to connect the bottom joints of two adjacent transition section side plates.

[0009] An optional solution is that the upper connecting part includes an upper outer connecting plate and an upper inner connecting plate; the upper outer connecting plate and the upper inner connecting plate are respectively located on the inner and outer sides of the transition section cone plate; and the upper outer connecting plate and the upper inner connecting plate are connected by a plurality of first bolts.

[0010] An optional solution is that the upper outer connecting plate is provided with an inner concave surface, which is fitted to the outer side of the transition section cone plate; the upper inner connecting plate is provided with an outer convex surface, which is fitted to the inner side of the transition section cone plate.

[0011] An optional solution is that the middle connecting part includes a middle outer connecting plate and a middle inner connecting plate; the middle outer connecting plate and the middle inner connecting plate are respectively located on the inner and outer sides of the transition section side plate; and the upper outer connecting plate and the upper inner connecting plate are connected by a plurality of second bolts.

[0012] An optional solution is that the middle and outer connecting plates and the middle and inner connecting plates are arranged vertically; the vertically arranged middle and outer connecting plates and the middle and inner connecting plates connect the middle and upper joints of two adjacent transition section side plates.

[0013] An optional solution is that the lower connecting part includes a lower outer connecting plate and a lower inner connecting plate; the lower outer connecting plate and the lower inner connecting plate are respectively located on the inner and outer sides of the transition section side plate; and the lower outer connecting plate and the lower inner connecting plate are connected by a plurality of third bolts.

[0014] An optional solution is that the lower outer connecting plate and the lower inner connecting plate are arranged transversely; the transversely arranged lower outer connecting plate and the lower inner connecting plate connect the bottom joints of two adjacent transition section side plates.

[0015] On the other hand, a frame-type wind power tower is also provided, comprising the assembled transition section structure, a tower and a tower barrel; the tower frame comprises a tower main column, and a main column flange is arranged at the top of the tower main column; the main column flange is fixedly connected to the cast steel flange at the bottom end of the assembled transition section structure; the bottom end of the tower barrel is fixedly connected to the segmented flange at the top end of the assembled transition section structure through the tower barrel flange.

[0016] Beneficial effects:

[0017] The above-mentioned assembled transition section structure and frame-type wind turbine tower split the assembled transition section structure into four identical segmented structures. The segmented structure is small in size and easy to transport. The four segmented structures can be directly assembled and connected using bolts at the installation site, and a flat plate connection part is used for fixed connection at the splicing position. The flat plate structure is subjected to force by friction bolt connection, the friction surface is subjected to friction force, the bolts are not easy to loosen, and the quality is easy to ensure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of an assembled transition section structure in one embodiment;

[0019] Figure 2 For along Figure 1 AA line section view;

[0020] Figure 3 for Figure 2 The enlarged view of the D part in FIG.

[0021] Figure 4 For along Figure 1 BB line section view;

[0022] Figure 5 for Figure 4 The enlarged view of the F part in the figure;

[0023] Figure 6 For along Figure 1 The CC line section view in the figure;

[0024] Figure 7 for Figure 6 Enlarged view of part E in .

[0025] Figure numerals: 1. slice structure; 11. cast steel pipe; 12. transition section side plate; 13. transition section cone plate; 14. flat plate connection; 141. upper connection; 1411. upper outer connection plate; 1412. upper inner connection plate; 142. middle connection; 1421. middle outer connection plate; 1422. middle inner connection plate; 143. lower connection; 1431. lower outer connection plate; 1432. lower inner connection plate; 15. segmented flange; 16. cast steel flange; 17. transition section flange connecting ring; 2. first bolt; 3. second bolt; 4. third bolt. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present application in a schematic manner, and therefore the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0028] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which this application can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by this application, should still fall within the scope of the technical contents disclosed in this application.

[0029] The directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential" and the like in this specification are based on the directions or positional relationships shown in the drawings and are only for the convenience of simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0030] The embodiments of the present application provide an assembled transition section structure and a frame-type wind turbine tower. Compared with the integral transition section, the assembled transition section structure is convenient to transport and can be assembled and connected on site using bolts. Compared with on-site welding of the integral transition section, the construction speed is fast, the on-site assembly efficiency is high, and the installation quality is easy to ensure.

[0031] The following is a detailed description of an assembled transition section structure provided by this embodiment in conjunction with the accompanying drawings. Figure 1 As shown, it includes: four slice structures 1 with the same structure, and the four slice structures 1 are assembled with each other; each slice structure 1 includes a cast steel pipe 11, a transition section side plate 12, a transition section cone plate 13 and a flat plate connecting portion 14; the bottom end of the transition section cone plate 13 is connected to the cast steel pipe 11, and the top end of the transition section cone plate 13 is fixedly installed with a segmented flange 15; the transition section side plates 12 are arranged on both sides of the cast steel pipe 11, and the top end of the transition section side plates 12 is connected to the transition section cone plate 13; the flat plate connecting portion 14 is arranged at the joint of the transition section cone plate 13 and the transition section side plates 12 in two adjacent slice structures 1 and is connected and fixed by bolts; the bottom end of the cast steel pipe 11 is provided with a cast steel flange 16.

[0032] In this embodiment, the assembled transition section structure is divided into four segmented structures 1 with the same structure, and then the four segmented structures 1 are directly assembled at the installation site to form an assembled transition section structure. The single segmented structure 1 is small in size and easy to transport, and is assembled using bolts at the installation site. Compared with the on-site welding of the entire transition section, the assembled transition section structure has a fast construction speed, high on-site assembly efficiency, and easy to ensure installation quality. In this embodiment, a flat plate connecting portion 14 is used to connect and fix the joints of the transition section cone plate 13 and the transition section side plate 12 in two adjacent segmented structures 1. The setting of the flat plate connecting portion 14 does not require welding, is more convenient, and improves processing and manufacturing efficiency. In addition, the flat plate connecting portion 14 adopts a flat plate structure, and the force-bearing mode is a friction-type bolt connection. The friction surface is subjected to friction force, and the bolts are not easy to loosen.

[0033] Please continue to refer to Figure 1 As shown, in this embodiment, it should be noted that the assembled transition section structure also includes an integrally arranged transition section flange connection ring 17, which is used to fix and connect the segmented flanges 15 in the four segmented structures 1. It can be understood that each segmented flange 15 is fixed to the top of the transition section cone plate 13, and the transition section flange connection ring 17 is used to connect and fix the four segmented flanges 15. Since the segmented flanges 15 in this embodiment are assembled in four splicing ways, one transition section flange connection ring 17 is used to connect and fix the four segmented flanges 15, which can improve the integrity of the transition section and enhance the overall strength of the segmented flanges 15. Preferably, the transition section flange connection ring 17 and the segmented flanges 15 are also connected by bolts.

[0034] Please continue to refer to Figure 1 As shown, in this embodiment, it is also necessary to explain that the flat plate connection part 14 includes an upper connection part 141, a middle connection part 142 and a lower connection part 143; the upper connection part 141 is used to connect the joints of two adjacent transition section cone plates 13; the middle connection part 142 is used to connect the middle and upper joints of two adjacent transition section side plates 12; the lower connection part 143 is used to connect the bottom joints of two adjacent transition section side plates 12. Since four slicing structures 1 are designed in this embodiment, a gap will be formed at the joint when two adjacent slicing structures 1 are spliced. Therefore, by using the upper connection part 141, the middle connection part 142 and the lower connection part 143, the two adjacent slicing structures 1 can be fixedly connected at the joint gap, thereby forming an integral transition section structure.

[0035] Please refer to Figure 1 , Figure 2 as well as Figure 3As shown, in one feasible manner, the upper connecting portion 141 includes an upper outer connecting plate 1411 and an upper inner connecting plate 1412, and the upper outer connecting plate 1411 and the upper inner connecting plate 1412 are respectively located on the inner and outer sides of the transition section cone plate 13, and the upper outer connecting plate 1411 and the upper inner connecting plate 1412 are connected by a plurality of first bolts 2. It can be understood that when assembling two adjacent transition section cone plates 13, the upper outer connecting plate 1411 is attached to the outer sides of the two adjacent transition section cone plates 13, and the upper inner connecting plate 1412 is attached to the inner sides of the two adjacent transition section cone plates 13, and then the upper outer connecting plate 1411, the upper inner connecting plate 1412 and the two adjacent transition section cone plates 13 can be connected into a whole by using the first bolts 2, thereby realizing the assembly operation. It should be noted that a longitudinal gap is formed at the joint of two adjacent transition section cone plates 13. Therefore, in this embodiment, the upper outer connecting plate 1411 and the upper inner connecting plate 1412 are arranged to be vertical and extend along the longitudinal gap, so that the joint of the two adjacent transition section cone plates 13 can be shielded and fixedly connected.

[0036] Preferably, since the transition section cone plate 13 is an arc-shaped plate with a certain curvature, in order for the upper outer connecting plate 1411 and the upper inner connecting plate 1412 to better fit the inner and outer surfaces of the transition section cone plate 13, in this embodiment, one side of the upper outer connecting plate 1411 used to fit the transition section cone plate 13 is set as an inner concave surface, and the inner concave surface of the upper outer connecting plate 1411 can fit the outer side of the transition section cone plate 13, and one side of the upper inner connecting plate 1412 used to fit the transition section cone plate 13 is set as an outer convex surface, and the outer convex surface of the upper inner connecting plate 1412 can fit the inner side of the transition section cone plate 13. In this way, the inner concave surface of the upper outer connecting plate 1411 and the outer side of the transition section cone plate 13 can fit flatly, and the outer convex surface of the upper inner connecting plate 1412 and the inner side of the transition section cone plate 13 can fit flatly, thereby ensuring flatness, having a sufficient contact area, and improving installation quality.

[0037] Please refer to Figure 1 , Figure 4 as well as Figure 5 As shown, in an achievable manner, the middle connecting portion 142 includes a middle outer connecting plate 1421 and a middle inner connecting plate 1422, the middle outer connecting plate 1421 and the middle inner connecting plate 1422 are respectively located at the inner and outer sides of the transition section side plate 12, and the middle outer connecting plate 1421 and the middle inner connecting plate 1422 are connected by a plurality of second bolts 3. It can be understood that when assembling two adjacent transition section side plates 12, the middle outer connecting plate 1421 and the middle inner connecting plate 1422 simultaneously fit the inner and outer sides of the two adjacent transition section side plates 12, and then the middle outer connecting plate 1421, the middle inner connecting plate 1422 and the two adjacent transition section side plates 12 can be connected into a whole by using the second bolts 3, thereby realizing the assembly operation.

[0038] It should be noted that a longitudinal gap is formed at the joint of two adjacent transition section side panels 12. Therefore, in this embodiment, the middle and outer connecting plates 1421 and the middle and inner connecting plates 1422 are arranged to be vertical and extend along the longitudinal gap. In other words, the middle and outer connecting plates 1421 and the middle and inner connecting plates 1422 are arranged to be vertical long strips, and the vertical long strips are fitted along the longitudinal gap, so that the joint of the two adjacent transition section side panels 12 can be covered and fixedly connected, and the middle and outer connecting plates 1421 and the middle and inner connecting plates 1422 connect and fix the splicing gap near the middle and upper position of the transition section side panels 12.

[0039] Please refer to Figure 1 , Figure 6 as well as Figure 7 As shown, in an achievable manner, the lower connecting portion 143 includes a lower outer connecting plate 1431 and a lower inner connecting plate 1432, the lower outer connecting plate 1431 and the lower inner connecting plate 1432 are respectively located at the inner and outer sides of the transition section side plate 12, and the lower outer connecting plate 1431 and the lower inner connecting plate 1432 are connected by a plurality of third bolts 4. It can be understood that when assembling two adjacent transition section side plates 12, the lower outer connecting plate 1431 and the lower inner connecting plate 1432 simultaneously fit the inner and outer sides of the two adjacent transition section side plates 12, and then the lower outer connecting plate 1431, the lower inner connecting plate 1432 and the two adjacent transition section side plates 12 can be connected into a whole by using the third bolts 4, thereby realizing the assembly operation.

[0040] Preferably, a longitudinal gap is formed at the joint of two adjacent transition section side panels 12 when they are spliced ​​and assembled, the top of the middle connecting portion 142 is nearly flush with the top of the transition section side panel 12, and the bottom of the middle connecting portion 142 is at a distance from the bottom of the transition section side panel 12, and the distance is connected and fixed using the lower connecting portion 143. The lower connecting portion 143 is arranged horizontally, and the bottom of the middle connecting portion 142 is close to the upper side of the lower connecting portion 143, and the lower side of the lower connecting portion 143 is nearly flush with the bottom of the transition section side panel 12. Therefore, in this embodiment, the lower outer connecting plate 1431 and the lower inner connecting plate 1432 of the lower connecting portion 143 are horizontally arranged, and the horizontally arranged lower outer connecting plate 1431 and the lower inner connecting plate 1432 fix the bottom of the two adjacent transition section side plates 12. The horizontally arranged lower outer connecting plate 1431 and the lower inner connecting plate 1432 at the bottom position can install more bolts, and the contact area is also increased, and the friction force is increased, which can further enhance the fixing strength of the two adjacent transition section side plates 12.

[0041] The flat plate connection part 14 in this embodiment adopts an inner and outer connection plate structure, which has no weld work and does not require welding, is more convenient, and improves the processing and manufacturing efficiency. In addition, the force-bearing mode is a friction-type bolt connection, and the friction surface is subjected to friction force, so the bolts are not easy to loosen.

[0042] In this embodiment, a frame-type wind power tower is also provided, including the above-mentioned assembled transition section structure, tower and tower, wherein the tower includes a tower main column, the top of the tower main column is provided with a main column flange, the main column flange and the cast steel flange 16 at the bottom end of the assembled transition section structure are fixedly connected; the bottom end of the tower is fixedly connected to the segmented flange 15 at the top end of the assembled transition section structure through the tower flange.

[0043] The implementation principle of this embodiment is as follows: in the factory, the assembled transition section structure is assembled into a whole by using tooling and temporarily fixed, and then the welding between the cast steel pipe 11 and the transition section cone plate 13, the welding between the cast steel pipe 11, the transition section cone plate 13 and the transition section side plate 12, the welding between the transition section cone plate 13 and the segmented flange 15, and the welding between the cast steel pipe 11 and the cast steel flange 16 are completed in sequence; after the welding is completed, the assembled transition section structure is split into four equal pieces of the sliced ​​structure 1 and transported to the installation site;

[0044] At the installation site, the four-part segmented structure 1 is assembled into a whole through the flat plate connection part 14 and bolts, and then hoisted to the top of the tower for installation; after the assembled transition section structure is hoisted, the tower is hoisted to complete the bolt installation of the tower flange at the bottom of the tower and the segmented flange 15 on the transition section cone plate 13.

[0045] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An assembled transition section structure, characterized in that: include: Four slice structures (1) with the same structure, the four slice structures (1) are assembled with each other; Each of the slice structures (1) comprises a cast steel pipe (11), a transition section side plate (12), a transition section cone plate (13), and a flat plate connecting portion (14); The bottom end of the transition section cone plate (13) is connected to the cast steel pipe (11), and the top end of the transition section cone plate (13) is fixedly mounted with a segmented flange (15); The transition section side plates (12) are arranged on both sides of the cast steel pipe (11), and the top ends of the transition section side plates (12) are connected to the transition section cone plates (13); The flat plate connection portion (14) is arranged at the joint of the transition section cone plate (13) and the transition section side plate (12) in two adjacent slice structures (1) and is connected and fixed by bolts; A cast steel flange (16) is provided at the bottom end of the cast steel pipe (11).

2. The assembled transition section structure according to claim 1, characterized in that: It also comprises an integrally arranged transition section flange connecting ring (17), wherein the transition section flange connecting ring (17) fixedly connects the segmented flanges (15) in the four segmented structures (1).

3. The assembled transition section structure according to claim 1, characterized in that: The flat plate connecting portion (14) comprises an upper connecting portion (141), a middle connecting portion (142) and a lower connecting portion (143); The upper connecting portion (141) is used to connect the joints of two adjacent transition section cone plates (13); The middle connecting portion (142) is used to connect the middle and upper joints of two adjacent transition section side panels (12); The lower connecting portion (143) is used to connect the bottom joints of two adjacent transition section side panels (12).

4. The assembled transition section structure according to claim 3 is characterized in that: The upper connecting portion (141) comprises an upper outer connecting plate (1411) and an upper inner connecting plate (1412); The upper outer connecting plate (1411) and the upper inner connecting plate (1412) are respectively located on the inner and outer sides of the transition section cone plate (13); The upper outer connecting plate (1411) and the upper inner connecting plate (1412) are connected by using a plurality of first bolts (2).

5. The assembled transition section structure according to claim 4, characterized in that: The upper outer connecting plate (1411) is provided with an inner concave surface, and the inner concave surface is fitted to the outer side of the transition section cone plate (13); The upper inner connecting plate (1412) is provided with an outer convex surface, and the outer convex surface is fitted to the inner side of the transition section cone plate (13).

6. The assembled transition section structure according to claim 5, characterized in that: The middle connecting portion (142) comprises a middle outer connecting plate (1421) and a middle inner connecting plate (1422); The middle outer connecting plate (1421) and the middle inner connecting plate (1422) are respectively located at the inner and outer sides of the transition section side plate (12); The upper outer connecting plate (1411) and the upper inner connecting plate (1412) are connected by using a plurality of second bolts (3).

7. The assembled transition section structure according to claim 6, characterized in that: The middle and outer connecting plates (1421) and the middle and inner connecting plates (1422) are arranged vertically; The middle outer connecting plate (1421) and the middle inner connecting plate (1422) arranged vertically connect the middle and upper joints of two adjacent transition section side plates (12).

8. The assembled transition section structure according to claim 3, characterized in that: The lower connecting portion (143) comprises a lower outer connecting plate (1431) and a lower inner connecting plate (1432); The lower outer connecting plate (1431) and the lower inner connecting plate (1432) are respectively located on the inner and outer sides of the transition section side plate (12); The lower outer connecting plate (1431) and the lower inner connecting plate (1432) are connected by a plurality of third bolts (4).

9. The assembled transition section structure according to claim 8, characterized in that: The lower outer connecting plate (1431) and the lower inner connecting plate (1432) are arranged transversely; The lower outer connecting plate (1431) and the lower inner connecting plate (1432) arranged transversely connect the bottom joints of two adjacent transition section side plates (12).

10. A frame-type wind power tower, characterized in that: It comprises an assembled transition section structure, a tower frame and a tower as described in any one of claims 1 to 9; The tower frame comprises a tower main column, and a main column flange is arranged at the top of the tower main column; The main column flange is fixedly connected to the cast steel flange (16) at the bottom end of the assembled transition section structure; The bottom end of the tower is fixedly connected to the segmented flange (15) at the top end of the assembled transition section structure via a tower flange.

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