CN115126662A

CN115126662A - Cable-type light wind power tower and self-lifting installation method thereof

Info

Publication number: CN115126662A
Application number: CN202210809506.1A
Authority: CN
Inventors: 卢召红; 王佳美; 李岩
Original assignee: Northeast Petroleum University
Current assignee: Northeast Petroleum University
Priority date: 2022-07-11
Filing date: 2022-07-11
Publication date: 2022-09-30

Abstract

The invention relates to the technical field of research and development of wind power towers, in particular to a cable-type light wind power tower and a self-elevating installation method thereof. The cable-type light-duty wind power tower includes: a built-in steel skeleton composed of H-shaped steel A-pillars and H-shaped steel B-pillars, outsourcing thin-walled towers, prestressed cables and foundations. The height of the wind power tower is generally 50-150 meters. The diameter of the tower is generally 2.0-3.6 meters. The wind power tower is equipped with an automatic lifting working platform. The working platform has the dual functions of construction operations and providing safety and stability during the construction phase of the structure. The invention solves the problem of raising and installing the wind power tower.

Description

Cable-type light wind power tower and self-lifting installation method thereof

Technical Field

The invention relates to the technical field of research and development of wind power generation towers, in particular to a stay cable type light wind power tower and a self-lifting installation method thereof.

Background

Wind power is a low-carbon environment-friendly green power resource, and is a major technology which is vigorously developed and advocated internationally. In the application of wind power technology, the manufacturing, installation and structural stability and reliability of a wind power tower are one of the key elements influencing the development and application of the technology. The wind power tower is required to be high in height no matter on sea or land, the power of the wind power tower and the excitation force of blades are large, the diameter and the wall of the tower are large in order to meet the requirements of mechanical stability and reliability of the wind power tower, and the weight and the material demand of the tower are increased along with the influence of the factors. The wind power tower and the wind wheel under the excitation force are easy to resonate, so that the tower barrel structure is damaged. In addition, the tower is a typical high-rise structure, the manufacturing, transportation and installation difficulty of the tower is increased due to the heavy structural components, and the construction cost is higher and the later maintenance is difficult. Therefore, how to research and develop a wind power tower structure with safety, stability, convenient transportation and installation, especially convenient installation and application in mountainous and hilly areas with inconvenient transportation is a problem to be solved urgently.

Disclosure of Invention

It is an object of the present invention to provide a lightweight and inexpensive to install cable thin shell wind power tower and a method of self-elevating installation thereof. The wind power tower is formed by installing light components stage by stage, and is convenient and quick to transport and install, and stable and reliable in structure. The invention further aims to provide the installation device, which is convenient for the installation of the tower barrel and safe and quick in the installation process.

The technical scheme adopted by the invention for solving the technical problems is as follows: the wind power tower is composed of components such as an internal framework formed by vertical upright posts with guide rails, a thin-shell steel cylinder wrapped outside the framework, a 'n' -shaped inhaul cable and the like. The upper end of the wind power tower is connected with the wind driven generator and the blades, and the lower end of the wind power tower is connected with the base layer. The tower barrel is installed through a self-lifting platform device in the tower.

In the scheme, the framework is composed of 6H-shaped steel upright posts. The stand is installed stage by stage, and every section length is 3 ~ 5 meters, and upper and lower section passes through the connecting piece and connects. The horizontal direction is connected with each other through a tower cylinder and a flange, and the construction and installation stages are connected through an installation telescopic arm.

The thin-shell tower drum in the scheme is divided into 6 tower drum lobes, each of which is high and the stage length is the same as that of the column. Arc flanges are welded at the upper end and the lower end of the tower barrel, the upper section and the lower section of the tower barrel are connected with each other through the flanges by bolts, and the annular sections of the tower barrel are connected with each other through the upright posts by bolts.

The 'n' -shaped stay cable in the scheme is formed by connecting the stay cables of upper sections in a layered manner on the outer side of the tower. The tower barrel is provided with a hoop in sections, the stay cable is connected with the hoop through the equal-strength pull rod, the prestress of the stay cable is applied to the tower barrel, the stress performance and the stability of the tower barrel are enhanced, the stay cable is tensioned and anchored by adopting prestress tensioning equipment, the prestress is determined by design calculation, and the bottom of the stay cable is connected with the uplift pile foundation.

The self-lifting platform device in the tower consists of an automatic lifting platform, a guide rail and a small crane. The automatic climbing platform is provided with an upper table surface and a lower table surface, and each table surface is provided with three controllable telescopic arms and a hand grip. The platform is lifted up and down along the tooth-shaped guide rail on the upright post.

The guide rail is arranged on the column A in the cylinder and is connected with the column through a bolt. When the telescopic arm works, the hand grips on the telescopic arm can clamp the upright column, so that the platform and the upright column can form a stable structural space system.

The small crane is arranged on the upper table top of the operating platform and can rotate in the barrel, so that the tissue component can be conveniently hoisted.

The invention has the beneficial effects

The light wind power tower has the advantages of small weight, large difference between the self-vibration frequency of the structure and the excitation frequency of the fan wheel, and difficult resonance. The wind power tower is reasonably composed of an internal framework, a thin shell barrel, a prestressed inhaul cable and other main components, is safe and stable in structure, convenient to transport and install and particularly suitable for being applied to mountainous and hilly areas with inconvenient traffic. This from lifting installation device in wind power tower cylinder, the construction installation of being convenient for need not to set up in addition installation scaffold frame or use large-scale erection equipment. The wind power tower is simple and quick to manufacture and install and has good economic benefit.

Drawings

FIG. 1 is an elevation view of a wind tower structure.

FIG. 2 is a plan view of a wind tower structure.

FIG. 3 is a view of the built-in steel skeleton

FIG. 4 is a thin-walled tower lobe view.

Fig. 5 is a schematic view of an automatic lifting platform.

FIG. 6 is a structural diagram of the connecting nodes of the upper and lower segments of the tower.

FIG. 7 is a view of a hoop coupling configuration of a tower, taken along section line I-I of FIG. 6

Figure 8 is a schematic view of the engagement of a robotic gripper with a guide rail.

FIG. 9 illustrates the coupling of the tension rods to the tower hoop.

In the figure: 1-tower cylinder, 2-prestressed stay rope, 3-equal strength pull rod, 4-tower cylinder hoop, 5-generator blade, 6-uplift pile foundation, 7-tower cylinder skeleton foundation, 8-flange, 9-A column, 10-B column, 11-telescopic lifting arm, 12-platform automatic telescopic arm, 13-mechanical gripper, 14-automatic lifting platform, 15-bolt rod, 16-upper table top, 17-lower table top, 18-telescopic support, 19-small lifting machine, 20-tooth surface guide rail, 21-H section steel flange, 22-connecting piece, 23-upper section column, 24-lower section column, 25-bolt

Detailed Description

The invention is further described below with reference to the accompanying drawings:

the structural elevation form of the cable type light wind power tower is shown in figure 1. The height of the tower is 50-150 meters generally, and the specific height is determined according to factors such as power generation function requirements, environment and the like. The structural plane form of the wind power tower is shown in fig. 2, the diameter of a tower cylinder of the wind power tower is generally 2.0-3.6 meters, and the specific size is determined by design calculation of factors such as tower height, load size and the like. An automatic lifting working platform of a wind power tower is shown in fig. 3, and the working platform has double functions of construction operation and safety and stability in a structural construction stage.

The cable type light wind power tower mainly comprises the following components: the built-in steel skeleton shown in FIG. 3; the thin-walled tower shown in FIG. 4; the self-elevating platform shown in fig. 5; a prestressed stay cable; a connecting member; a tower drum, a foundation of a framework structure, a pull cable uplift pile foundation and the like.

FIG. 3 shows an internal steel skeleton, wherein the skeleton column is formed by connecting 6H-shaped steel sections in sections, and the length of each section is 3-5 m. The upper and lower segments are connected by a connector 22, in the manner shown in figure 6. The A upright post 9 and the B upright post 10 between the same sections are connected with each other through the tower sections 1 to form a stable space structure system, and the connection mode is shown in FIG. 7. The inner flange of the upright post of the built-in framework A is provided with a tooth-shaped guide rail 20, and the guide rail is used for climbing the lifting platform. The B upright post and the A upright post are both made of H-shaped steel with the grade of Q345 or above, the specific size is determined by design calculation, and the arrangement mode is shown in figure 2.

FIG. 4 shows a thin-walled tower segment, the tower 1 being assembled from 6 identical segments. The length of each tower segment is the same as that of the upright post segment. The upper and lower ends of the cylinder are welded with arc flanges 8 in advance, and bolt rods 25 are arranged on two sides. The tower drum segment is lifted by a crane on the automatic lifting working platform, and after the height and the position of the specified section are reached, the bolt rod penetrates through a screw hole reserved in the upright post, and then the bolt rod is firmly connected with the upright post by a bolt to form a closed tower drum. The upper and lower sections of the tower are connected by an arc flange 8 in the manner shown in fig. 6.

Fig. 5 shows the automatic lifting platform for installation, the upper and lower table-boards of the platform, the upper table-board 16 and the lower table-board 17. Each table top is provided with three automatic telescopic arms 12, the end parts of the telescopic arms are provided with machine grippers 13, and the machine grippers 13 are meshed and fixed with the guide rails 20, as shown in figure 8. When the platform is lifted, the machine gripper of the upper table-board 16 is released, the machine gripper 13 at the end part of the telescopic arm of the lower table-board 17 is occluded and fixed with the guide rail, the telescopic bracket 18 is extended to drive the upper table-board to lift, and after reaching the designated height, the gripper 13 of the upper table-board 16 is occluded and fixed with the rail; then, the mechanical gripper 13 of the lower table surface 17 is released, the telescopic bracket 18 is contracted, the lower table surface is lifted, and after the lifting is finished, the mechanical gripper of the lower table surface is meshed and fixed with the guide rail, so that the lifting is finished once. The descending process is the reverse.

The worktop shown in figure 5 is provided with a small crane 19 which is rotatable within the drum for lifting components to be installed on the wind tower etc.

The 'n' -shaped stay cable 2 passes through the end round holes of the equal-strength pull rods 3 arranged on each section, the equal-strength pull rods 3 are connected with the hoops 4 of the tower barrel subsection, and the structure mode is shown in fig. 9.

The bottom of a guy cable of the wind power tower is connected with an uplift pile foundation 6, and a tower cylinder and a cylinder built-in framework are connected with a foundation 7.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. A cable type light wind power tower and a self-lifting installation method thereof are characterized in that: the cable type light wind power tower is composed of a built-in steel skeleton formed by an H-shaped steel A column (9) and an H-shaped steel B column (10), an externally-coated thin-wall tower barrel (1), a prestressed stay cable (2) and a foundation, wherein the height of the wind power tower is generally 50-150 meters, the diameter of the wind power tower barrel is generally 2.0-3.6 meters, the specific height is determined according to factors such as power generation function requirements, the environment and the like, an automatic lifting working platform is arranged in the wind power tower barrel, and the working platform has double functions of construction operation and safety and stability in the structural construction stage.

2. The cable light wind power tower according to claim 1, characterized in that: built-in steel skeleton, the skeleton stand comprises six H shaped steel stands segmental connection, every segmental length 3 ~ 5 meters, connect through connecting piece (22) between the upper and lower section, through tower section lamella (1) interconnect between A stand (9) and B stand (10) between the same section, constitute stable spatial structure system, the interior flange surface mounting profile of tooth guide rail (20) of built-in skeleton A stand, the guide rail supplies lift platform to climb and uses, the B stand all adopts the H shaped steel preparation more than Q345 rank with the A stand.

3. The cable type light wind power tower drum is characterized in that the tower drum (1) is composed of six same tower drum segments, the length of each tower drum segment is the same as that of an upright post segment, arc-shaped flanges (8) are welded at the upper end and the lower end of each tower drum segment in advance, mounting bolt rods (25) are arranged at two sides of each tower drum segment, each tower drum segment is lifted by a crane (19) on an automatic lifting working platform, after the bolt rods penetrate through screw holes reserved in the upright posts after the height and the position of the assigned segment are reached, bolts are firmly connected with the upright posts to form a closed tower drum, and the upper segment and the lower segment of the tower drum are connected through the arc-shaped flanges (8).

4. The automatic lifting working platform according to claim 1, characterized in that: the automatic lifting working platform is provided with an upper table top (16) and a lower table top (17), three automatic telescopic arms (12) are arranged in each table top, machine grippers (13) are arranged at the ends of the telescopic arms, the automatic lifting working platform is occluded with a guide rail (20) to climb or be fixed through the machine grippers (13), when the platform is lifted, the machine grippers of the upper table top (16) are released, the machine grippers (13) at the ends of the telescopic arms of the lower table top (17) are occluded with the guide rail to be fixed, a telescopic support (18) between the upper table top and the lower table top is extended to drive the upper table top (16) to ascend, and after the specified height is reached, the grippers (13) of the upper table top (16) are occluded with the rail to be fixed; then, the mechanical gripper (13) arranged on the lower table top (17) is released, the telescopic bracket (18) is contracted, the lower table top (17) is lifted, and after the lifting is finished, the mechanical gripper on the lower table top is meshed and fixed with the guide rail to finish one-time lifting, and the descending process is opposite to the lifting process.

5. The prestressed stay cable of claim 1, wherein: the guy cable is arranged along the tower barrel to form a 'n' shaped guy cable (2), the guy cable passes through a round hole at the end part of an equal-strength pull rod (3) arranged at each section of the tower barrel in a stretching way, and the equal-strength pull rod (3) is connected with a hoop (4) of each section of the tower barrel.

6. An automatic lifting platform according to claim 4, the working surface of the platform is provided with a small crane (19) which can rotate in the barrel for lifting the parts to be installed of the wind tower and the like.

7. The automatic lifting platform of claim 4, characterized in that the guide rail used for the automatic lifting platform is mounted on the column A (9) in the cylinder, the guide rail and the column are connected by bolts; during installation, the hand grips on the telescopic arms can clamp the upright posts, so that the platform and the upright posts can form a stable structural space system.