Supporting composite rigid tower for wind turbine and mounting method therefor

Abstract

A new supporting composite rigid tower for a wind turbine comprises the following, which are arranged in sequence from bottom to top: a tower foundation connected to a tower; three or more conical multi-section rigid tower tubes of the same specification, which are closely arranged to serve as a base of the supporting composite tower; a connecting transition section connecting the base to an upper tower; and an upper multi-section conical tower tube designed on the basis of the height of the whole apparatus and use requirements. The upper multi-section conical tower tube connects a wind turbine main unit and impellers. By means of the hoisting of each conical tower tube section and the connection of tube section flanges with high-strength bolts, the construction and mounting of the tower base, the connecting transition sections of the tower and the upper tower tube are completed in sequence, and finally, the implementation and application of the wind turbine are achieved. The rigid tower can also be widely used in the fields of power, communication and building engineering as a rigid support platform.

Description

A wind turbine supporting composite rigid tower and its installation method TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation facilities, power, communication and construction engineering, and particularly relates to a wind turbine supporting composite rigid tower and its installation method, and is used as a rigid support platform in other fields such as power, communication and construction engineering. BACKGROUND

[0002] With the continuous increase of wind turbine unit capacity, large impellers and high towers have become an inevitable result of wind turbine development. At the same time, higher average wind speed and wind energy utilization rate can be obtained in areas with high wind shear or higher towers, therefore, the design and research and development of new towers and engineering applications are crucial to the development of wind power technology. Compared with common wind power towers such as flexible towers, steel-concrete towers, trusses or space structures, the wind turbine supporting composite rigid tower proposed in the present application has the advantages of large structural stiffness, simple construction process, short installation and construction period, mature design, manufacturing and production process of traditional steel rigid towers, and reusable tower for demolition projects, and other advantages. The development of this solution has important significance for energy saving and emission reduction, and promoting high-quality development of the industry. In addition, the use of the composite rigid support platform can also be applied to the bottom support platform of power, communication towers, bridges, buildings and other engineering facilities, achieving cost reduction and efficiency improvement and energy saving and emission reduction in many industry fields. TECHNICAL PROBLEM

[0003] The purpose of the present application is to propose a new type of wind turbine supporting composite rigid tower, which takes into account the advantages of traditional tower applications and reuse of tower for demolition projects, to solve the problems of various wind turbine towers in the background art. TECHNICAL SOLUTION

[0004] To achieve the above purpose, the technical solution adopted by the present application is as follows.

[0005] A new type of wind turbine support type composite rigid tower and its installation method, including the wind turbine foundation connected with the tower, three or more than three same specification cone type multi-section rigid tower drum closely arranged as the base of the new type support type composite tower, the connecting transition section connecting the base and the upper tower, the upper multi-section cone tower designed according to the overall height and use requirement, the upper tower drum connecting the wind turbine main machine and the impeller, the base of the support type tower is provided with a tower drum door at the bottom of each cone tower drum, and electrical equipment or facilities such as control cabinet, transformer, anti-climber, power cable and communication cable are placed in each cone tower drum according to the overall design requirement, each cone tower drum can be provided with multi-section drum segments connected through flanges and bolts, the connecting transition section is sequentially provided with a bottom transition section base plate, a rigid cone drum and an upper flange and bolt connected with a complete top tower drum from bottom to top, the bottom transition section base plate is provided with three or more than three sinking holes, and corresponding through holes are arranged at the connecting position of the top end of the cone tower drum and connected through high-strength bolts, the through hole is a personnel access hole for installation or maintenance personnel, and a built-in climbing ladder is installed to ensure personnel access, the base plate can be made of casting or forging, and the excess metal material is removed or thinned to realize weight reduction design and maintain the overall connection stiffness of the tower transition section, a flange with a certain wall thickness is reserved at the outer edge of the base plate and welded with the drum segment to form a transition section, and the upper cone tower adopts a multi-section cone tower drum connection, and the height, taper and number of drum segments can be determined according to the overall design and installation height of the wind turbine.

[0006] Further, the lower base of the support type composite rigid tower is three or more than three same specification cone type multi-section rigid tower drums, which can be new tower drums designed and manufactured according to the use requirement of the wind turbine, or can be old unit reused tower drums which are tested to meet the application conditions and have higher structural safety factor.

[0007] Further, the base of the support type composite rigid tower is connected with the bottom flange of the three or more than three same specification cone type multi-section rigid tower drums in a traditional and mature base ring or anchor bolt connection mode, so as to reduce the design and construction cost of the wind turbine foundation.

[0008] Further, the bottom of each cone type multi-section rigid tower drum can place control cabinet, transformer, anti-climber, power cable, communication cable and other electrical equipment or facilities according to the design and installation requirement, and the size and layout of the wind turbine supporting equipment can be placed centrally or in different tower drums.

[0009] Further, the inner flange and bolt connection of each cone type multi-section rigid tower drum segment, the internal assembly or maintenance platform of the drum segment, the design and installation of elevator or anti-climber and other auxiliary accessories are basically the same as those of the traditional multi-section cone type rigid tower, or the old unit reused tower drum is directly used to reduce the design and manufacturing cost of the base tower drum.

[0010] Furthermore, the transition section between the connecting base and the tower is an integral welded structure, consisting of three components welded together: a bottom transition section chassis, a rigid conical cylinder, and an upper flange. The corresponding conical tower and the top conical tower are connected to the base by high-strength bolts.

[0011] Furthermore, the transition section chassis is provided with three or more recessed holes, and corresponding through holes are designed at the top of the conical tower. The through holes are manholes for installation or maintenance personnel. Personnel passage is ensured by installing built-in ladders. A flange with a certain wall thickness is reserved on the outer edge of the chassis and welded to the cylinder section to form a transition section.

[0012] Furthermore, the transition section chassis can be manufactured by casting or forging, and excess metal material can be removed or thinned to achieve weight reduction design and maintain the overall connection rigidity of the tower transition section.

[0013] Furthermore, the top conical tower adopts a multi-segment conical tower tube connection, and the height, taper and number of tube sections are determined according to the overall design and installation height of the wind turbine generator.

[0014] Furthermore, the main unit and rotor are conventional wind turbine generator equipment, and the top conical rigid tower is connected in sequence to key components of the wind turbine generator such as the yaw brake disc, yaw bearing, and main unit frame by high-strength bolts.

[0015] The novel wind turbine support type composite rigid tower and its installation method are used for the construction and installation of the aforementioned novel tower, and include the following steps.

[0016] S1. Complete the foundation construction and conduct level and flatness tests on three or more foundation rings or anchor bolt connection platforms to ensure the initial installation accuracy of the tower base.

[0017] S2. After completing the installation of the control cabinet and electrical equipment at the bottom of the tower, according to the marked position of the tower door, hoist the three or more tower base sections with tower doors at the bottom onto the corresponding foundation rings or anchor bolt platforms, and connect them with high-strength bolts.

[0018] S3. Measure the horizontality and flatness of the top flange of the bottom tower section after installation, as well as the verticality of each tower section. After meeting the construction and installation conditions, hoist and install the second tower section of the base in sequence, and connect them with high-strength bolts.

[0019] S4. Complete the testing and hoisting of each tower section of the tower base in sequence, and complete the installation of equipment or components such as platforms and ladders inside the corresponding sections, until the hoisting of the top tower section of the base.

[0020] S5. After completing the installation of the tower section at the top of the base, hoist the transition section connecting the base and the upper tower. According to the marked positions inside and outside the transition section chassis, guide the transition section chassis to the top flange of each tower section at the top of the base, and complete the connection between the tower section at the top of the base and the transition section with high-strength bolts.

[0021] S6. After the transition section is installed, hoist the bottom section of the upper tower to the top flange of the transition section and install it by connecting it with high-strength bolts. On this basis, install each section of the upper tower in sequence until the hoisting and installation of all tower sections of the supported composite rigid tower are completed.

[0022] S7. After completing the hoisting of the support-type composite rigid tower and the installation of the internal platform and components, the traditional method is used to hoist and install the wind turbine main unit and rotor and other systems and equipment, until the construction and installation of the tower and wind turbine are completed. Beneficial effects

[0023] Compared with existing technologies, the novel wind turbine support type composite rigid tower design, manufacturing, and installation of this invention have the following advantages:

[0024] (1) The structure of the support-type composite rigid tower is highly rigid, and its design and manufacturing are mature. It can meet the design and application of wind turbine towers of different capacity levels and has wide applicability.

[0025] (2) The base conical tower, connecting transition section and top tower of the support type composite rigid tower are all installed by segmented small-sized rigid cylinder sections connected by high-strength bolts. This can meet the transportation requirements of various complex road conditions such as remote mountainous areas, bridges and tunnels in engineering construction. In addition, the installation process of a single conical tower is mature, which can significantly reduce the construction and installation cycle and cost.

[0026] (3) The design, manufacturing and installation of the support-type composite rigid tower, the combination of multi-cone base is flexible and convenient, and it greatly inherits the design and manufacturing conditions of traditional towers. In practical applications, a brand-new support base design can be adopted, or a tower with a higher structural safety factor can be reused for old wind farm renovation projects, which greatly reduces the production, manufacturing, transportation and transfer installation costs. Attached Figure Description

[0027] Figure 1 is a structural schematic diagram of an embodiment of the supported composite rigid tower and wind turbine of the present invention.

[0028] Figure 2 is a schematic diagram of the rigid tower connection foundation of the present invention.

[0029] Figure 3 is a schematic diagram of the various tower sections and construction and installation of the bottom base of the rigid tower of the present invention.

[0030] Figure 4 is a schematic diagram and cross-sectional view of the rigid tower connection transition section and construction and installation structure of the present invention.

[0031] Explanation of reference numerals in the attached drawings: 1. Tower foundation; 1.1. Concrete portion of the tower foundation; 1.2. Tower foundation ring portion; 1.3. Tower foundation ring flange and high-strength bolt connection; 2. Tower base; 2.1. Tower tube door at the bottom of the tower base; 2.2. Tower tube section at the bottom of the tower base; 2.3. Flanges and high-strength bolt connections for each level of tower tube section at the tower base; 2.4. Tower top flange and high-strength bolt connection at the top of the tower base; 3. Tower connection... 3.1 Tower connecting transition section chassis; 3.2 Manhole corresponding to the tower connecting transition section chassis and the top tower of the base; 3.3 High-strength bolt connection corresponding to the tower connecting transition section chassis and the top tower of the base; 3.4 Tower connecting transition section cylinder; 3.5 Top flange of tower connecting transition section; 3.6 Flange and high-strength bolt connection between tower connecting transition section and upper tower; 4. Upper tower of the tower; 5. Wind turbine main unit and rotor. The best embodiment of the present invention

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the following describes, in conjunction with the accompanying drawings and specific embodiments, an embodiment of the present invention combining the support-type composite rigid tower with the field of wind power generation, and how it is implemented as a rigid support platform for wind turbine generators.

[0033] This invention provides a novel wind turbine support type composite rigid tower and its installation method. As shown in Figure 1, the novel tower and wind turbine embodiment include a wind turbine foundation 1 connected to the tower, three or more identical conical multi-segment rigid tower sections arranged closely as the base 2 of the novel support type composite tower, a connecting transition section 3 connecting the base and the upper tower, an upper multi-segment conical tower section 4 designed according to the overall height and usage requirements, and an upper tower section connecting the wind turbine main unit and rotor 5. After the tower foundation construction is completed, the tower base, connecting transition section, upper tower section, main unit, and rotor (composed of three or more identical conical multi-segment rigid tower sections) are hoisted from bottom to top and from inside to outside, along with the installation of electrical equipment and structural components. Embodiments of the present invention

[0034] Specifically, the tower foundation to which the tower belongs, as shown in Figure 2, is a reinforced concrete foundation 1.1 constructed with three or more foundation rings or anchor bolts, which supports the upper tower, main unit and impeller, etc. It is connected to the bottom tower section of the tower base through the corresponding foundation rings 1.2 and foundation ring flanges and high-strength bolts 1.3.

[0035] Specifically, the tower base to which the tower belongs, as shown in Figure 3, has a tower door 2.1 at the bottom of each conical tower section. Each tower section 2.2 at the bottom of the base houses electrical equipment or facilities such as control cabinets, transformers, non-climbing devices, power cables, and communication cables, according to the overall design requirements. Each conical tower section can be configured as multiple sections connected by upper and lower inner flanges and high-strength bolts 2.3. The tower section 2.4 at the top of the tower base is connected to the transition section base 3.1 by high-strength bolts.

[0036] Specifically, the connecting transition section to which the tower belongs, as shown in Figure 4, consists of, from bottom to top, a transition section base 3.1 connected to the top tower 2 of the base, a rigid cone 3.4, and an upper flange 3.5 and high-strength bolts 3.6 connected to the upper tower 4. The bottom transition section base is provided with three or more recessed holes, and a corresponding through hole 3.2 is provided at the connection position with the top of the tower at the base, and is connected by a flange and high-strength bolts 3.3. The through hole is a manhole for installation or maintenance personnel, and a built-in ladder is installed to ensure personnel passage.

[0037] Specifically, the chassis 3.1 to which the tower connection transition section belongs can be made by casting or forging, and excess metal material can be removed or thinned to achieve weight reduction design and maintain the overall connection rigidity of the tower transition section. A flange with a certain wall thickness is reserved on the outer edge of the chassis and welded to the rigid cone 3.4 of the transition section.

[0038] Specifically, the upper conical tower 4 of the tower adopts a multi-section conical tower section connection. The height, taper and number of sections can be determined according to the overall design and installation height of the wind turbine generator. It is connected to the main unit and rotor 5 through flanges and high-strength bolts. Industrial applicability

[0039] This invention provides an installation method for a novel wind turbine support type composite rigid tower, specifically for the construction and installation of this novel tower. The specific construction and installation steps are as follows.

[0040] The first step is to complete the construction, maintenance, and acceptance of the reinforced concrete of the tower foundation 1.1, and then check whether the relative positions of three or more foundation rings 1.2 meet the design and calibration requirements. At the same time, check the levelness and flatness of the foundation ring flanges 1.3 to ensure the initial installation accuracy of the tower base.

[0041] The second step is to complete the installation of the bottom control cabinet and electrical equipment on the bottom base of the tower, and then, according to the marked position of the tower door 2.1, hoist the three or more tower base sections 2.2 containing the tower door at the bottom onto the corresponding foundation ring or anchor bolt platform and connect them with high-strength bolts.

[0042] The third step is to measure the levelness and flatness of the top flanges of each section of the bottom tower after installation, as well as the verticality of each tower section. After the construction and installation conditions are met, the second tower section of the base is hoisted and installed in sequence and connected by high-strength bolts.

[0043] Step 4: Test and hoist each tower section of the tower base in sequence, and install the corresponding internal platform, ladder and other equipment or components until the top tower section of the base is hoisted. Check whether the flange 2.4 on the top tower section of the base meets the technical requirements for installing the tower transition section 3.

[0044] Step 5: After completing the installation of the tower section at the top of the base, hoist the transition section 3 connecting the tower base 2 and the upper tower 4. According to the inner and outer markings on the transition section chassis 3.1, guide the transition section chassis to the top flange 2.4 of each tower at the top of the base, and complete the connection 3.3 between the tower at the top of the base and the transition section using high-strength bolts.

[0045] Step 6: After completing the installation of tower transition section 3, hoist the bottom section of the upper tower 4 to the top flange 3.5 of the transition section and connect it with high-strength bolts 3.6. On this basis, complete the installation of each section of the upper tower in sequence until the hoisting and installation of all tower sections of the supported composite rigid tower are completed.

[0046] Step 7: Hoist and install the wind turbine main unit and rotor 5 until the construction and installation of the tower and wind turbine are completed.

[0047] This invention provides a novel wind turbine supported composite rigid tower and its installation method. Specifically, it involves using three or more identical conical multi-segment rigid tower sections as support bases 2 on a reinforced concrete foundation 1. A tower transition section 3 is set up to connect the support bases and the upper tower section 4 through internal flanges and high-strength bolts to form a supported composite rigid tower. The construction and installation of the support bases, tower transition section, and upper tower section are completed sequentially through the hoisting and installation of each conical tower section. Finally, the wind turbine main unit and rotor 5 are implemented. The tower structure described in this invention has high rigidity and a high safety factor. The design, research and development, manufacturing, and construction and installation processes are mature. It can maximize the use of current tower application technology and the reuse of towers dismantled from old units, greatly reducing the cost of the entire process, including design, production, transportation, and installation.

[0048] Finally, it should be noted that the above description is only an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A novel composite rigid tower for wind turbine support and its installation method, characterized in that: The tower base (1) is connected to the tower from bottom to top, three or more identical conical multi-section rigid tower cylinders are arranged closely as the base of the new type of support composite tower (2), the connecting transition section connecting the base and the upper tower (3), the upper multi-section conical tower cylinder designed according to the overall height and usage requirements (4), and the upper tower cylinder connecting the wind turbine generator main unit and the rotor (5). The construction and installation of the tower support base, tower transition section and upper tower cylinder are completed in sequence through the hoisting of each conical tower cylinder section and the connection of the cylinder section flange and high-strength bolts.

2. The tower foundation connected to the tower according to claim 1, characterized in that: A reinforced concrete foundation (1.1) constructed with three or more foundation rings or anchor bolts supports the upper tower, main unit and impeller, etc. It is connected to the bottom tower section of the tower base through corresponding foundation rings (1.2) and foundation ring flanges and high-strength bolts (1.3).

3. The tower base (2) according to claim 1, characterized in that: The base includes three or more identical conical multi-segment rigid towers. In the implementation example, three towers are usually used as the support platform. The number of towers supporting the platform is N, where N is an integer and N≧3.

4. The tower base (2) according to claim 1, characterized in that: The multi-section rigid tower and its sections that make up the tower base can be new towers that meet the design requirements for use with applicable wind turbine generators and have been verified to meet the load and strength requirements, or towers with a higher safety factor that can be reused after the wind farm is upgraded and the generators are removed.

5. The tower base (2) according to claim 1, characterized in that: Each conical tower section at the base is equipped with a tower door (2.1). Each tower section at the bottom of the base (2.2) has electrical equipment or facilities placed inside according to the overall design requirements. Each conical tower section can be set up as multiple sections and connected by upper and lower inner flanges and high-strength bolts (2.3). The tower section at the top of the tower base (2.4) is connected to the transition section base (3.1) by high-strength bolts.

6. The tower transition section (3) according to claim 1, characterized in that: The connecting transition section consists of, from bottom to top, the bottom transition section chassis (3.1), the rigid cone (3.4), the upper flange (3.5), and the high-strength bolts (3.6) connecting to the top complete tower.

7. The tower transition section chassis (3.1) according to claim 5, characterized in that: Three or more recessed holes are provided at the position corresponding to the tower base (2), and corresponding through holes (3.2) are provided at the connection position with the top of the conical tower and connected by high-strength bolts (3.3). The through holes are manholes for installation or maintenance personnel, and personnel passage is ensured by installing built-in ladders.

8. The tower transition section chassis (3.1) according to claim 5, characterized in that: The components are manufactured by casting or forging, and excess metal material is removed or thinned to achieve weight reduction design and maintain the overall connection rigidity of the tower transition section. A flange with a certain wall thickness is reserved on the outer edge of the chassis and welded to the rigid cone of the transition section 3.

4.

9. The upper multi-segment conical tower (2) according to claim 1, characterized in that: The multi-section conical tower can be composed of one or more tower sections connected together. The height, taper and number of sections are determined according to the overall design and installation height of the wind turbine. It is installed on the inner flange (3.5) at the top of the transition section and connected by high-strength bolts (3.6). The top section is connected to the main unit and the impeller (5).

10. The tower construction and installation method according to claim 1, characterized in that: To maximize the use of existing mature tower hoisting and installation methods, when installing flanges or high-strength bolts inside the tower sections, it is necessary to properly mark the relative positions of the multi-section flanges of the tower base and the top flange of the top section of the base, and to check the horizontality, flatness, and verticality to ensure the installation accuracy of the tower of the invention.

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