Novel support type composite tower transition section platform of wind driven generator

Abstract

The utility model relates to a novel wind driven generator supporting type composite tower transition section platform, which belongs to the fields of electric power, communication, constructional engineering and the like and comprises a tower unit top tower drum connected with the tower transition section platform, the tower transition section platform, connecting high-strength bolts and an upper tower drum connected with the tower transition section platform. According to the tower transition section platform, an integrated transition section design scheme is further improved and optimized, structural components are simple in design, safe and reliable, the operation safety of a tower can be well guaranteed, meanwhile, steel castings or forged steel castings are adopted for manufacturing, the technological process is mature, the mature production and machining technology of a wind generating set can be continued, and the production cost is reduced. And the production and manufacturing cost of the transition section platform is further reduced.

Description

Technical Field

[0001] This utility model relates to wind power generation facilities, power, communication and construction engineering and other fields, and specifically to a novel wind turbine support type composite tower transition section platform. Background Technology

[0002] This utility model discloses a platform design scheme for the transition section of a wind turbine supported composite tower. It supplements the transition section design in a series of wind turbine supported composite tower designs. Compared to the original integrated design of the transition section and connecting tower, the platform design, manufacturing process, and installation and testing methods proposed in this utility model can serve as a novel technical solution and key structural component selection method. It offers numerous advantages, including simple design and manufacturing, low production costs, convenient construction processes, and short installation cycles. The formulation of this solution provides richer technical solutions, equipment selection, and implementation plans for the design and application of supported composite towers, and is of great significance for energy conservation and emission reduction in the industry and for promoting high-quality industrial development. Utility Model Content

[0003] The purpose of this utility model is to propose a new design, manufacturing process and installation and testing method for a wind turbine supported composite tower transition platform, which takes into account the advantages of traditional tower application and tower reuse in dismantling projects, and is used to expand and enrich the technical solutions, equipment selection and optimization design of supported composite tower transition platforms in the background art.

[0004] To achieve the above objectives, the technical solution and key structural component design of this utility model are as follows.

[0005] A novel design, manufacturing process, and installation and testing method for a transition platform of a wind turbine support type composite tower includes a tower base top tower cylinder connected to the transition platform, a tower transition platform and connecting high-strength bolts, and an upper tower cylinder connected to the transition platform. The wind turbine tower structure to which the transition platform belongs consists of three or more identical conical multi-segment rigid tower cylinders closely arranged as the base of the novel support type composite tower, a transition platform connecting the base and the upper tower, and an upper connecting tower cylinder. The connecting transition platform, from bottom to top, consists of a conical sleeve section of the base top segment, the transition platform, and the bottom segment of the upper tower cylinder. The flange on the top segment of the base cylinder connects to... High-strength bolts are connected to three or more recessed holes on the transition platform. Corresponding through holes are provided at the connection positions to serve as manholes for installation or maintenance personnel. An internal ladder is installed to ensure personnel access. As a key structural component of this design, the transition platform can be manufactured by casting or forging, with excess metal material removed or thinned to achieve weight reduction and maintain the overall connection rigidity of the tower transition section. The transition platform is connected to the flange of the upper tower section by high-strength bolts. To ensure structural strength, a boss design is used at the corresponding connection positions. In order to integrate with the traditional tower bottom flange design, two design schemes are adopted: single-row inner flange bolt connection and double-row inner and outer flange bolt connection.

[0006] Furthermore, the lower base of the supported composite rigid tower consists of three or more identical conical multi-section rigid tower sections. These can be new tower sections designed and manufactured according to the usage requirements of wind turbine generators, or they can be reused tower sections from dismantled old units that have been inspected and tested to meet application conditions and have a higher structural safety factor.

[0007] Furthermore, the transition platform connecting the base and the tower is a key structural component of this design. It is a single casting or forging part, which is integrally formed through casting or forging processes, and then the final product is obtained through multiple machining processes.

[0008] Furthermore, the manufacturing process and production flow of the transition platform connecting the base and the tower include, but are not limited to, the following casting manufacturing process, flaw detection and machining steps.

[0009] S1. Based on the structural strength design results of the transition platform of the wind turbine-supported composite tower, carry out the casting process design of the transition platform, and determine the process method and process parameter settings.

[0010] S2. Based on the process design requirements of the transition section platform, carry out casting work on key structural components of the transition section, including mold preparation, casting molding, mold polishing and core making, mold assembly, metal smelting, molten iron pouring, mold opening and sand removal, shot blasting and grinding.

[0011] S3. Perform non-destructive testing on the cast transition platform, including ultrasonic internal void inspection and magnetic particle surface crack inspection, as well as physical and chemical property testing, including tensile strength, yield strength, elongation and low temperature impact energy.

[0012] S4. For the transition section structural components after flaw detection, according to the mechanical processing design requirements, carry out turning, boring and milling to achieve rough and fine machining of the plane and holes of the transition section platform, drilling of the bolt holes connecting the lower base, transition section and upper tower, and grinding of screw holes or surface burrs that are difficult to machine on machine tools.

[0013] S5. Perform finished product inspection on the machined transition section structural components, including machining dimensions and technical requirements, surface cleaning, sandblasting, and anti-corrosion painting, to complete the product manufacturing of the transition section platform structural components.

[0014] Furthermore, at the outermost edge of the structural boss, the transition platform is machined with corresponding vertically upward arrows and other markings to detect the horizontality and verticality of the support-type composite tower base installation, ensuring the overall installation accuracy of the composite tower equipment.

[0015] Furthermore, the upper surface of the transition section platform is connected to the upper tower using high-strength bolts. Based on the design dimensions and specifications of the bottom flange of the upper tower, the height and width of the boss are set. The upper tower can be designed using either an "L"-shaped bottom flange with internal high-strength bolts or a "T"-shaped bottom flange with internal and external high-strength bolts.

[0016] Furthermore, the transition platform is connected to the lower base flange and the upper tower flange using high-strength bolts. The number and specifications of the high-strength bolts are determined by the overall load and bolt connection strength verification, and they are installed into the platform structural components using blind holes. To ensure equipment reliability, the bolt hole threads can be strengthened.

[0017] Furthermore, the transition platform is provided with three or more sinkholes, and corresponding through holes are designed at the top of the conical tower. The through holes are manholes for installation or maintenance personnel, and personnel passage is ensured by installing built-in ladders.

[0018] The installation and testing method for the novel wind turbine support type composite tower transition platform is used for the installation and testing of the aforementioned novel composite tower transition platform, and includes the following steps.

[0019] S1. After the lower tower sections of the support-type composite tower base are hoisted, the installation of equipment or components such as the internal platform and ladder of the corresponding sections is completed, until the installation of the top tower section of the base.

[0020] S2. Before installing the transition platform, key parameters such as the relative position of the top tower section of the base, the surface of the top flange, verticality, and flatness are detected and tested. A reasonable test error range is determined, and the corresponding tower sections installed out of tolerance are corrected and adjusted.

[0021] S3. Hoist the transition platform to the top flange of the tower base. Use three approximately 120° bolt guide rods or reamed hole bolts to position the relative position of the transition platform and the three top tower sections of the base. Use construction techniques such as the "cross" method to install the connecting bolts of the flanges on each top tower section in sequence.

[0022] S4. During the installation and construction of the transition platform, equipment such as ground total station or theodolite is used to monitor the outermost markings of the transition platform structure, and to check parameters such as the installation level and verticality of the transition platform to ensure installation quality.

[0023] S5. For the design of bolted connections of inner or outer flanges of the upper tower, the bolt installation is completed by construction techniques such as the "cross method". For the design of bolt installation of inner and outer flanges, the installation of external high-strength bolts is carried out by spider-man or on the outer extension platform of the transition section platform, and the installation of the upper tower is finally completed.

[0024] Compared with existing technologies, the novel wind turbine support type composite tower transition section platform design, manufacturing process and installation and testing method have the following beneficial effects:

[0025] (1) The transition platform design of the support-type composite rigid tower has been further improved and optimized. The integrated transition section design scheme has simple structural component design, is safe and reliable, and can well ensure the safety of tower operation.

[0026] (2) The transition platform is made of cast steel or forged steel, and the process is relatively mature. It can adopt the mature production and processing technology of wind turbine generator sets, which further reduces the production and manufacturing cost of the transition platform. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a structural schematic diagram of the design and embodiment of the support-type composite rigid tower transition section platform of this utility model.

[0029] Figure 2 This is a schematic diagram of the bolted connection between the rigid tower transition section platform and the top of the base tower of this utility model.

[0030] Figure 3 This is a comparative schematic diagram of two designs for the connection between the rigid tower transition section platform and the upper tower flange of this utility model.

[0031] Figure 4 This is a schematic diagram of the key structural features of the rigid tower transition section platform of this utility model.

[0032] Explanation of reference numerals in the attached drawings: 1. Top tower of the tower unit; 1.1. Base tower; 1.2. Construction or maintenance platform; 1.3. Internal ladder; 1.4. Support frame; 1.5. High-strength bolts connecting the top tower and the transition platform; 2. Tower transition platform and connecting high-strength bolts; 2.1. Main structural components of the tower transition platform; 2.1.1. Manhole; 2.1.2. Central recessed concave platform; 2.1.3. Upper convex platform; 2.2. Inspection and installation process identifier; 2.3. High-strength bolts connecting the transition platform and the bottom flange of the upper tower; 3. Upper tower. Detailed Implementation

[0033] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following describes, in conjunction with the accompanying drawings and specific embodiments, an optimized technical solution and an example of structural component selection for the key structural components of the support-type composite rigid tower transition platform of this utility model as a rigid tower transition section design.

[0034] This utility model provides a novel design, manufacturing process, and installation and testing method for a composite tower transition platform for wind turbine support. An embodiment of the novel tower transition platform design is provided, as follows: Figure 1 As shown, the invention includes a top tower cylinder 1 of the tower unit connected to the tower transition platform, structural components of the tower transition platform body, high-strength bolts 2 connecting the top tower cylinder and the upper tower cylinder of the base, and an upper tower cylinder 3 connected to the tower transition platform. The invention also provides a manufacturing process for the tower transition platform, as well as engineering construction, monitoring, and testing methods suitable for on-site hoisting and installation.

[0035] Specifically, the top tower section to which the tower base belongs and its main internal components, such as... Figure 2 As shown, three or more base towers 1.1 are connected to the tower transition platform. The base towers are equipped with a construction or maintenance platform 1.2 for personnel to install bolts and for operation and maintenance, an internal ladder 1.3 for personnel or climbing-free or climbing-assisted equipment, and support frames 1.4 that are connected to the inner wall of the tower and the transition platform respectively. The base towers and the tower transition platform are connected by high-strength bolts 1.5.

[0036] Specifically, the design of the tower transition platform and the connection between the tower and the upper tower, such as... Figure 3 As shown, the main structural component 2.1 of the tower transition platform is a single structural component manufactured by casting or forging processes. In order to ensure the accuracy of hoisting and installation, a detection and installation process identifier 2.2 is set at the outer edge of the transition platform. According to the high-strength bolt 2.3 connection scheme of the bottom flange of the upper tower, a boss is designed on the upper surface of the transition platform for the connection of the inner flange and the connection of the inner and outer flanges respectively.

[0037] Specifically, the connecting transition platform to which the tower belongs, such as Figure 4 As shown, its key component structural design includes three or more recessed holes connected to the top tower of the base, a passageway 2.1.1 suitable for personnel construction or operation and maintenance, a central recessed concave platform 2.1.2 to reduce material usage and raw material costs, and an upper surface convex platform 2.1.3 for bolt connection with the upper tower 3 flange. The upper surface convex platforms of different transition sections are set with different heights, widths and the number of connecting bolt holes according to the differences in the connecting flanges.

[0038] The novel wind turbine generator support type composite rigid tower transition section platform provided by this utility model is a key structural component of the design, and is a single casting or forging. The main steps of the specific manufacturing process and production flow are as follows.

[0039] The first step is to design the casting process for the transition platform of the wind turbine support type composite tower, and determine the process method and parameter settings.

[0040] The second step involves the manufacturing processes for key structural features of the transition platform's main components, including but not limited to mold preparation, casting, mold polishing and core making, mold assembly, metal smelting, molten iron pouring, unpacking and sand removal, shot blasting and grinding, etc.

[0041] The third step is flaw detection and inspection of the transition platform castings, including non-destructive testing such as ultrasonic internal void inspection and magnetic particle surface crack inspection, as well as physical and chemical property testing such as tensile strength, yield strength, elongation and low temperature impact energy.

[0042] The fourth step involves the machining process of the transition platform, including turning, boring, and milling to rough and finish the planes and holes of the transition platform, drilling the bolt holes connecting the lower base, transition section, and upper tower, and grinding the screw holes or surface burrs that are difficult to machine on machine tools.

[0043] Step 5: Inspection and surface treatment of structural components of the transition platform, including finished product inspection such as machining dimensions and technical requirements, surface cleaning, sandblasting and anti-corrosion painting.

[0044] This utility model provides a novel method for installing and testing a transition platform for a composite rigid tower supported by a wind turbine. Specifically, it is used for the installation and testing of this novel composite tower transition platform. The specific construction and installation steps are as follows.

[0045] The first step is to hoist each tower section 1.1 at the bottom of the tower base and complete the installation of equipment or components such as the corresponding internal platform 1.2, ladder 1.3, and ladder fixing bracket 1.4.

[0046] The second step involves detecting and testing key parameters such as the relative position of the top tower section of the base, the surface of the top flange, verticality, and flatness. For tower sections installed out of tolerance, corrections and adjustments are made.

[0047] The third step is to hoist the transition platform to the top flange of the tower base. For each section of the tower base, the top flange is positioned using three approximately 120° bolt guide rods or reamed hole bolts. The relative positions of the transition platform and the three top tower sections of the base are then installed. The connecting bolts of each top tower section flange are installed sequentially using construction techniques such as the "cross" method.

[0048] Step 4: Use a ground total station or theodolite to monitor the outermost edge marker 2.2 of the transition section platform structure, and check parameters such as the installation level and verticality of the transition section platform.

[0049] Step 5: Use construction techniques such as the "cross" method to complete the installation of the connecting bolts 2.3 between the transition platform 2 and the upper tower 3. For the installation design of the inner and outer flange bolts, use a spider-man or install external high-strength bolts on the outer extension platform of the transition platform to finally complete the installation of the upper tower.

[0050] This utility model provides a novel design, manufacturing process, and installation and testing method for a composite tower transition platform for wind turbine support. It systematically introduces the design principles of the tower transition platform, the manufacturing process and production flow of the transition platform as a single casting or forging component, and methods suitable for on-site hoisting, installation, and testing. Specifically, the flange on the top section of the base cylinder 1 is connected to three or more recessed holes on the transition platform 2 via high-strength bolts 1.5. Corresponding through holes 2.1.1 are provided at the connection positions for manholes for installation or maintenance personnel. An internal ladder 1.3 ensures personnel access. The transition platform body 2, as a key structural component of this design, can be constructed using… The platform is manufactured by casting or forging, and excess metal material is removed or thinned to form a concave platform 2.1.2 to achieve weight reduction and maintain the overall connection rigidity of the tower transition section. In an embodiment, the convex platform 2.1.3 of the transition section platform is connected to the flange of the upper tower section 3 by high-strength bolts 2.3. The tower transition section platform design described in this utility model further improves and optimizes the integrated transition section design scheme. It has simple structural component design, is safe and reliable, and can well ensure the safety of tower operation. At the same time, it is manufactured by casting or forging steel parts, and the process flow is relatively mature. It can adopt the mature production and processing technology of wind turbine generator sets, further reducing the production and manufacturing cost of the transition section platform.

[0051] Finally, it should be noted that the above description is only an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A novel composite tower transition section platform for wind turbine support, characterized in that: The structure includes the top tower cylinder (1) of the tower base connected to the tower transition platform, the tower transition platform and connecting high-strength bolts (2), and the upper tower cylinder (3) connected to the tower transition platform. The wind turbine tower structure to which the transition platform belongs consists of three or more identical conical multi-segment rigid tower cylinders arranged closely together as the base, the transition platform connecting the base and the upper tower, and the upper connecting tower cylinder of this new type of support composite tower. The top tower cylinder (1) of the tower base includes at least three base tower cylinders (1.1) connected to the tower transition section platform. The base tower cylinder (1.1) is provided with a construction or maintenance platform (1.2) for personnel to install bolts and for operation and maintenance, an internal ladder (1.3) for personnel to pass through, and a support frame (1.4) for connecting with the inner wall of the base tower cylinder and the tower transition section platform. The support frame (1.4) is fixed to the base tower cylinder (1.1) and the tower transition section platform by high-strength bolts (1.5) connecting the top tower cylinder and the transition section platform. The tower transition platform and connecting high-strength bolts (2) include the tower transition platform body structure component (2.1), the inspection and installation process identifier (2.2), and the high-strength bolts (2.3) connecting the transition platform and the bottom flange of the upper tower. The inspection and installation process identifier (2.2) is located on the outer edge of the tower transition platform body structure component (2.1). The upper tower (3) is a single or multi-section tower that connects the transition platform to the wind turbine.

2. A novel wind turbine support type composite tower transition platform according to claim 1, characterized in that: the main structural component (2.1) of the tower transition platform is provided with at least three sinking holes and manholes suitable for personnel construction or maintenance. 2.1.1) The central recessed concave platform (2.1.2) is used to reduce material usage and raw material costs, and the upper surface convex platform (2.1.3) is used to connect with the flange bolt of the upper tower (3).

3. The novel wind turbine support type composite tower transition section platform according to claim 2, characterized in that: The top tower (1) of the tower base is connected to the sinkhole provided on the main structural component (2.1) of the tower transition platform through a high-strength bolt (1.5) connecting the top tower to the transition platform. The upper tower (3) is connected to the convex platform (2.1.3) on the upper surface of the main structural component of the tower transition platform through a high-strength bolt (2.3) connecting the bottom flange of the transition platform to the upper tower.

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