Concrete tower drum and assembly type steel concrete combined tower

Abstract

The invention relates to the field of wind turbine generators, in particular to a concrete tower drum and a fabricated steel concrete combined tower. The concrete tower drum comprises a drum body formed by a plurality of concrete inserting plates and a plurality of concrete supporting columns in an alternate surrounding mode, the drum body is in a pyramid frustum shape gradually contracting from bottom to top, inserting grooves are formed in the peripheral walls of the concrete supporting columns, and the concrete inserting plates are inserted into the inserting grooves of the two adjacent concrete supporting columns. The concrete inserting plates and the concrete supporting columns are all prefabricated parts. The combined tower comprises the steel fan tower drum and further comprises the concrete tower drum, and the steel fan tower drum is installed on the top of the drum body of the concrete tower drum. The problems that a concrete tower drum is large in size, heavy in weight and difficult to carry and transport are solved, and construction complexity and cost are reduced.

Description

Technical Field

[0001] The present application relates to the field of wind turbines, and in particular to a concrete tower and an assembled steel-concrete composite tower. Background Art

[0002] High tower technology plays an important role in the wind power industry, especially in the pursuit of higher hub heights to obtain better wind energy resources. At present, high tower technology is mainly divided into two categories: all-steel flexible towers and steel-concrete towers. The all-steel high-flexible tower has very high requirements for control and matching of the whole machine. In contrast, the steel-concrete tower is superior to the all-steel high-flexible tower in terms of overall machine safety and performance, and has lower requirements for other parts of the whole machine. Especially when the tower height exceeds 140 meters, the steel-concrete tower can not only ensure the safe and stable operation of the unit, but also significantly reduce the subsequent operation and maintenance costs and electricity costs. Therefore, steel-concrete towers have gradually become the mainstream choice in the industry and are widely used in wind power generation projects under various complex terrain conditions.

[0003] In order to meet the above needs, the existing steel-concrete tower technology has developed a variety of implementation plans. Common solutions include two types: cast-in-place steel-concrete tower and prefabricated steel-concrete tower. In the cast-in-place steel-concrete tower, the segmented casting method is usually adopted. Each section of the concrete tower is cast and formed in sequence at the construction site. The advantage of this solution is that it can flexibly adapt to different geological conditions, but it also has problems such as long construction period and difficult quality control. The prefabricated steel-concrete tower is a prefabricated component in the factory, and then transported to the construction site for assembly. This method can effectively shorten the construction time and improve the quality and efficiency of the project. In addition, according to different structural forms, steel-concrete towers can also be divided into multiple types such as circular steel-concrete towers and polygonal steel-concrete towers. These solutions have their own characteristics and are suitable for different application scenarios.

[0004] However, regardless of the type of steel-concrete tower, the main challenge it faces is how to achieve efficient and economical production and installation. Specifically, the existing technology often finds it difficult to balance economic benefits and construction convenience in the prefabrication process of concrete towers. Especially under transportation restrictions, how to design modular components that meet standard size requirements is a major problem. At the same time, due to the large size and heavy weight of concrete towers, handling and transportation are very difficult, which further increases the complexity and cost of construction. These problems have led to certain restrictions on the promotion of existing steel-concrete tower technology in practical applications, and a more optimized design solution is urgently needed to solve these problems. Summary of the invention

[0005] In order to solve the problem that concrete towers are large in size and heavy in weight, making them very difficult to handle and transport, which further increases the complexity and cost of construction, the present application provides a concrete tower and an assembled steel-concrete composite tower frame.

[0006] In the first aspect, the present application provides a concrete tower adopting the following technical solution: A concrete tower comprises a cylinder body alternately surrounded by a plurality of concrete inserts and a plurality of concrete support columns, wherein the cylinder body is a prism-shaped cone that gradually shrinks from bottom to top, slots are provided on the outer peripheral walls of the concrete support columns, the concrete inserts are inserted into the slots of two adjacent concrete support columns, and the concrete inserts and concrete support columns are both prefabricated parts.

[0007] By adopting the above technical solution, the whole concrete cylinder is divided into small prefabricated parts by concrete plugs and concrete support columns, which is convenient for handling and transportation, solves the problem of large volume, heavy weight, and difficulty in handling and transportation of concrete towers, and reduces the complexity and cost of construction. The small prefabricated parts of concrete towers have a short molding cycle, can be mass-produced at the same time, and can be assembled on site, shortening the construction period.

[0008] As a further improvement of the above technical solution, the concrete grade of the concrete support column is not less than C60, the diameter is not less than 800mm, the length is not more than 16m, the main reinforcement of the concrete support column is HRB400 or HRB500 threaded steel bars, the main reinforcement diameter is not less than 22mm, and the structural reinforcement and stirrups of the concrete support column are HRB400 threaded steel bars with a diameter of 8-12mm.

[0009] By adopting the above technical solution and setting up the main reinforcement, structural reinforcement and stirrups, the concrete support column reinforcement system is more stable and the concrete tower strength is better.

[0010] As a further improvement of the above technical solution, the slot depth is not less than 100 mm.

[0011] By adopting the above technical solution, the strength and stability of the connection between the support column and the plug board can be guaranteed.

[0012] As a further improvement of the above technical solution, the concrete grade of the concrete plug is not less than C50, the width is less than 5m, the length is less than 16m, the thickness is not more than 300mm, the main reinforcement of the concrete plug is HRB400 or HRB500 threaded steel bars, the main reinforcement diameter is not less than 22mm, and the structural reinforcement and stirrups of the concrete plug are HRB400 threaded steel bars with a diameter of 8-12mm.

[0013] By adopting the above technical solution, the setting of main reinforcement, structural reinforcement and stirrups makes the concrete insert reinforcement system more stable and the concrete tower strength better. As a further improvement of the above technical solution, the concrete insert plate is connected to the adjacent concrete support columns by dry bonding.

[0014] By adopting the above technical solution, the dry bonding method is conducive to ensuring the sealing between the concrete plug plate and the concrete support column.

[0015] In the second aspect, the present application provides a concrete tower adopting the following technical solution: An assembled steel-concrete combined tower comprises a steel wind turbine tower and the above-mentioned concrete tower, wherein the steel wind turbine tower is installed on the top of the cylinder body of the concrete tower.

[0016] By adopting the above technical solution, the production, transportation and installation process of the tower of the wind turbine generator set is made simpler, safer and less costly.

[0017] As a further improvement of the above technical solution, the steel wind turbine tower is a round tower, and the steel wind turbine tower is connected to the cylinder of the concrete tower by a transition section. The upper end face of the transition section is a circular ring surface that fits the round tower, the top of the concrete tower is formed as a concave polygonal cone surface, and the lower end face of the transition section is a convex polygonal cone surface that fits the top of the cylinder of the concrete tower.

[0018] By adopting the above technical solution, a special transition section is used to meet the connection between the steel round tower and the pyramidal concrete tower, which not only ensures the supporting strength of the pyramidal concrete tower, but also realizes the connection between the two.

[0019] As a further improvement of the above technical solution, the transition section is a steel part, including a steel circular flange and a steel polygonal conical flange, which are welded together.

[0020] By adopting the above technical solution, the steel transition section is easy to process and manufacture, and the segmented welding method allows the lower end to be independently provided with a convex polygonal cone surface, which can fit the concave polygonal cone surface of the pyramidal concrete tower.

[0021] As a further improvement of the above technical solution, a prestressed system is connected between the transition section and the cylinder of the concrete tower, a prestressed pipe is provided inside the concrete support column, and the prestressed system is arranged inside the prestressed pipe.

[0022] By adopting the above technical solution, the tensioning prestressed system can realize the connection between the transition section, the concrete tower and the ground foundation, thereby improving the tensile strength of the concrete tower. The steel strands of the prestressed system are in a tensioned state, which has a windproof and shock-absorbing effect on the concrete tower, thereby improving the safety factor. In summary, the present application includes at least one of the following beneficial technical effects: 1. Solve transportation problems and reduce construction costs: Through innovative design, this application effectively solves the handling and transportation problems caused by the large size and heavy weight of traditional concrete towers. This design not only simplifies the construction process, but also significantly reduces the complexity and cost of construction, and improves engineering efficiency.

[0023] 2. Optimize the design of the transition section and enhance the structural stability: The present invention adopts a special transition section design, including a steel circular flange and a steel polygonal conical flange, which is easy to process and manufacture. Through segmented welding, the lower end of the transition section can be independently set as a convex polygonal conical surface, which perfectly matches the concave polygonal conical surface of the pyramid-shaped concrete tower, thereby enhancing the stability and bearing capacity of the overall structure.

[0024] 3. Improve construction efficiency and shorten construction period: As both the concrete tower and concrete support columns are prefabricated, the on-site construction time is greatly shortened. The prefabricated components have a short molding cycle and can be mass-produced. Only assembly is required on site, which significantly shortens the construction period and improves construction efficiency.

[0025] 4. Enhance structural strength and improve safety performance: Through the carefully designed steel bar configuration, including the use of main bars, structural steel bars and stirrups, this application significantly improves the strength and stability of the concrete tower. This enhanced structural design not only improves the load-bearing capacity of the tower, but also improves the safety performance of the wind turbine and ensures long-term stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the concrete tower of Example 1 of the present application.

[0027] Figure 2 It is a cross-sectional view of the concrete tower in Example 1 of the present application.

[0028] Figure 3 It is a structural schematic diagram of the concrete support column in Example 1 of the present application.

[0029] Figure 4 It is a schematic diagram of the structure of the concrete insert in Example 1 of the present application.

[0030] Figure 5 It is a structural schematic diagram of the assembled steel-concrete composite tower of Example 2 of the present application.

[0031] Figure 6 yes Figure 5 Top view of the .

[0032] Figure 7 It is a cross-sectional view of the assembled steel-concrete composite tower in Example 2 of the present application.

[0033] Figure 8 It is a schematic diagram of the connection relationship between the transition section and the concrete tower in Example 2 of the present application.

[0034] Fig. 9 It is a stereoscopic diagram (one perspective) of the transition section in Example 2 of the present application.

[0035] Fig.10 It is a stereoscopic diagram (another viewing angle) of the transition section in Example 2 of the present application.

[0036] Fig.11 It is a cross-sectional view of the transition section in Example 2 of the present application.

[0037] Explanation of the reference numerals: 1. Concrete insert; 2. Concrete support column; 3. Cylinder; 4. Slot; 5. Steel fan tower; 6. Transition section; 7. Torus; 8. Concave polygonal cone; 9. Convex polygonal cone; 10. Steel circular flange; 11. Steel polygonal cone flange; 12. Prestressed system; 13. Prestressed pipe. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-11 This application is described in further detail.

[0039] The directional words such as "upper", "lower", "left", "right", "front", and "back" in this application only represent the relative positions in the drawings and are for the convenience of describing this application. They do not represent the absolute positions of the products and should not be regarded as limitations on this application.

[0040] Example 1 The embodiment of the present application discloses a concrete tower.

[0041] like Figure 1 and Figure 2 As shown, the concrete tower tube of this embodiment includes a cylinder 3 alternately surrounded by multiple concrete plugs 1 and multiple concrete support columns 2. In this embodiment, the concrete plugs 1 and concrete support columns 2 are preferably 8, and the cylinder 3 is a prism-shaped cone that gradually shrinks from bottom to top. Two slots 4 are provided on the outer peripheral wall of each concrete support column 2, and the concrete plugs 1 are inserted into the slots 4 of two adjacent concrete support columns 2. Preferably, the depth of the slots 4 is not less than 100 mm. To ensure the strength and stability of the connection between the support column and the plug.

[0042] Among them, the concrete plug 1 and the concrete support column 2 are both prefabricated parts. And the length, width and height dimensions of the concrete plug 1 and the concrete support column 2 are within the normal transportation limit dimensions. The concrete plug 1 and the concrete support column 2 divide the whole concrete cylinder into small prefabricated parts, which is convenient for handling and transportation, solves the problem of large volume, heavy weight, and difficulty in handling and transportation of the concrete tower, and reduces the complexity and cost of construction. The small prefabricated parts of the concrete tower have a short molding cycle, can be mass-produced at the same time, and can be assembled on site, shortening the construction cycle. In addition, the cylinder structure composed of the concrete plug 1 and the concrete support column 2 is stable, and the concrete tower with a prism-shaped structure that gradually shrinks from bottom to top not only has a high structural strength, but also saves materials and reduces costs.

[0043] like Figure 3 As shown, in this embodiment, the concrete support column 2 plays a major supporting role. The concrete support column 2 is a post-tensioned prestressed reinforced concrete structure, the concrete grade of which is not less than C60, the diameter is not less than 800 mm, and the length is not more than 16 m. The main reinforcement of the concrete support column 2 is HRB400 or HRB500 threaded steel bars, and the main reinforcement diameter is not less than 22 mm. The structural reinforcement and stirrups of the concrete support column 2 are HRB400 threaded steel bars with a diameter of 8 to 12 mm.

[0044] like Figure 4 As shown, in this embodiment, the concrete grade of the concrete plug 1 is not less than C50, the width is less than 5m, the length is less than 16m, the thickness is not more than 300mm, the main reinforcement of the concrete plug 1 is HRB400 or HRB500 threaded steel bar, the main reinforcement diameter is not less than 22mm, and the structural reinforcement and stirrups of the concrete plug 1 are HRB400 threaded steel bars with a diameter of 8-12mm. Similarly, the structural reinforcement and stirrups are reinforcement, which makes the reinforcement system of the concrete plug 1 more stable and the concrete tower has better strength.

[0045] In this embodiment, the concrete plug plate 1 is connected to the adjacent concrete support column 2 by dry bonding, which can play a role of lateral support, connection and sealing. It should be noted that in other embodiments, in order to improve the sealing effect and connection strength, the gap between the plug plate and the slot 4 is filled with glue.

[0046] In this embodiment, one of the concrete plug plates 1 needs to be designed with a door opening (not shown in the figure), which is used for workers to enter and exit the cylinder 3. The height and width of the door opening are designed according to the requirements of the wind turbine manufacturer.

[0047] The implementation principle of the concrete tower of this embodiment is: the prefabrication of the concrete plug 1 and the prefabrication and maintenance of the concrete support column 2 are completed at the concrete prefabrication site, and then the prefabrication of the concrete plug 1 and the concrete support column 2 are transported to the wind farm project address, and assembled on site to form the cylinder 3. The bottom of the cylinder 3 is installed on the foundation of the ground. After the installation of the concrete tower is completed, the steel wind turbine tower 5 is hoisted, and the steel wind turbine tower 5 is connected to the concrete tower. Finally, the wind turbine set is hoisted on the steel wind turbine tower 5.

[0048] It should be noted that the concrete tower can be set in multiple sections according to the height, each section is composed of a cylinder 3, and the concrete sections are vertically connected by dry bonding to form a hollow thin-walled tubular plate-column concrete tower. Of course, in addition to this embodiment, two adjacent concrete sections can also be vertically connected by on-site grouting, and a sealing strip is set at the connection to prevent the leakage of high-strength grouting material and play a sealing role.

[0049] Example 2 The embodiment of the present application discloses an assembled steel-concrete composite tower.

[0050] like Figures 5 to 7 As shown, the assembled steel-concrete composite tower of this embodiment includes a steel wind turbine tower 5 and the concrete tower of the above-mentioned embodiment 1. The steel wind turbine tower 5 is installed on the top of the cylinder body 3 of the concrete tower.

[0051] In this embodiment, the steel wind turbine tower 5 is a round tower. To facilitate the unification of prefabricated parts, the concrete plug plate 1 and the concrete support column 2 are both standard structures. The pyramidal structure of the concrete tower allows its top to form an inward-concave polygonal cone surface 8 during assembly. To facilitate the connection between the round tower and the pyramidal tower, a special transition section 6 is used to connect the steel wind turbine tower 5 and the cylinder 3 of the concrete tower. The upper end surface of the transition section 6 is a circular ring surface 7 that fits the round tower, and the lower end surface is a convex polygonal cone surface 9, as shown in FIG. Figure 8 As shown, the convex polygonal cone surface 9 fits with the concave polygonal cone surface 8 at the top of the concrete tower, thereby achieving the connection between the steel wind turbine tower 5 and the concrete tower.

[0052] like Figures 9 to 11 As shown, in this embodiment, the transition section 6 is a steel part, including a steel circular flange 10 and a steel polygonal conical flange 11, which are welded together. The top surface of the steel circular flange 10 is a circular ring surface 7 with bolt holes, and the steel wind turbine tower 5 is fixedly connected to the steel circular flange 10 by bolts. Figure 8As shown, in order to ensure that the top surface of the concrete tower tube and the transition section 6 have the largest fitting area, the steel polygonal conical flange 11 forms a convex polygonal conical surface 9 to match the top surface structure of the pyramid-shaped concrete tower tube, and the edge of the convex polygonal conical surface 9 is tangent to the outer circle of the concrete support column 2, thereby ensuring that the top surface of the concrete support column 2 is in full contact with the convex polygonal conical surface 9, and at the same time, it can save materials. The transition section 6 and the concrete tower tube are fastened by dry connection (or glue injection).

[0053] Specifically, the material of the transition section 6 is Q355 or above high-strength steel, the thickness of the bottom polygonal conical flange steel plate shall not be less than 180 mm, and the upper steel circular flange 10 is a forged flange, the thickness of which is determined according to the connecting bolts and shall not be less than 120 mm.

[0054] In this embodiment, a prestressed system 12 is connected between the transition section 6 and the cylinder 3 of the concrete tower, and a prestressed pipe 13 is provided inside the concrete support column 2, and the prestressed system 12 is arranged inside the prestressed pipe 13. An anchoring system is provided at the lower flange of the transition section 6, and an anchoring system is provided correspondingly on the ground foundation. The prestressed system 12 passes through the prestressed pipe 13 of the concrete tower, and the lower end is connected to the anchoring system of the ground foundation, and the upper end is connected to the anchoring system of the transition section 6. The prestressed system 12 is tightened by these two anchoring systems to realize the connection between the transition section 6, the concrete tower and the ground foundation, thereby improving the tensile strength of the concrete tower. The steel strands of the prestressed system 12 are in a tensioned state, which has a windproof and shock-absorbing effect on the concrete tower and improves the safety factor.

[0055] The implementation principle of the assembled steel-concrete composite tower of this embodiment is: First, the prefabrication of the concrete support column 2 and the prefabrication and maintenance of the concrete insert 1 are completed at the concrete prefabrication site, and then the concrete support column 2 and the concrete insert 1 are transported to the wind farm project address. While the concrete support column 2 and the concrete insert 1 are prefabricated, the transition section 6 is customized at the steel structure processing plant and the various components of the prestressed system 12 (steel strands, fixed end anchors and tensioning end anchors) are ordered from the prestressed component manufacturer. After the processing of the transition section 6 is completed, it is directly transported to the wind farm project address, and the various components of the prestressed system 12 are directly transported to the wind farm project address after being produced and processed by their respective manufacturers. After all the components of the assembled steel-concrete composite tower are transported to the site, the concrete tower and the transition section 6 are assembled on site, and the tensioning construction of the prestressed system 12 is completed. In this way, the installation of the assembled steel-concrete composite tower is completed, and then the steel wind turbine tower 5 is hoisted, and the steel wind turbine tower 5 is connected to the concrete tower, and finally the wind turbine set is hoisted on the steel wind turbine tower 5.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A concrete tower, characterized in that: The invention comprises a cylinder (3) formed by alternating a plurality of concrete inserts (1) and a plurality of concrete support columns (2); the cylinder (3) is a truncated pyramid shape that gradually contracts from bottom to top; slots (4) are provided on the outer peripheral walls of the concrete support columns (2); the concrete inserts (1) are inserted into the slots (4) of two adjacent concrete support columns (2); and the concrete inserts (1) and the concrete support columns (2) are both prefabricated parts.

2. The concrete tower according to claim 1, characterized in that: The concrete grade of the concrete support column (2) is not less than C60, the diameter is not less than 800 mm, and the length is not more than 16 m. The main reinforcement of the concrete support column (2) is HRB400 or HRB500 threaded steel bars, and the main reinforcement diameter is not less than 22 mm. The structural reinforcement and stirrups of the concrete support column (2) are HRB400 threaded steel bars with a diameter of 8 to 12 mm.

3. The concrete tower according to claim 1, characterized in that: The depth of the slot (4) is not less than 100 mm.

4. The concrete tower according to any one of claims 1 to 3, characterized in that: The concrete grade of the concrete plug plate (1) is not less than C50, the width is less than 5m, the length is less than 16m, and the thickness is not more than 300mm. The main reinforcement of the concrete plug plate (1) is HRB400 or HRB500 threaded steel bars, and the diameter of the main reinforcement is not less than 22mm. The structural reinforcement and stirrups of the concrete plug plate (1) are HRB400 threaded steel bars with a diameter of 8 to 12mm.

5. The concrete tower according to any one of claims 1 to 3, characterized in that: The concrete insert plate (1) is connected to the adjacent concrete support column (2) by dry bonding.

6. An assembled steel-concrete composite tower, comprising a steel wind turbine tower (5), characterized in that: It also comprises the concrete tower according to any one of claims 1 to 5, wherein the steel wind turbine tower (5) is installed on the top of the cylinder body (3) of the concrete tower.

7. The assembled steel-concrete composite tower according to claim 6, characterized in that: The steel wind turbine tower (5) is a round tower, and the steel wind turbine tower (5) is connected to the cylinder body (3) of the concrete tower by a transition section (6). The upper end surface of the transition section (6) is a circular ring surface (7) that fits the round tower, the top of the concrete tower is formed as an inwardly concave polygonal cone surface (8), and the lower end surface of the transition section is an outwardly convex polygonal cone surface (9) that fits the top of the cylinder body (3) of the concrete tower.

8. The assembled steel-concrete composite tower according to claim 7, characterized in that: The transition section (6) is a steel part, comprising a steel circular flange (10) and a steel polygonal conical flange (11), the two being welded together.

9. The assembled steel-concrete composite tower according to claim 7, characterized in that: A prestressed system (12) is connected between the transition section (6) and the cylinder body (3) of the concrete tower cylinder, a prestressed pipe (13) is provided inside the concrete support column (2), and the prestressed system (12) is arranged inside the prestressed pipe (13).

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