Inner and outer reverse spiral rib reinforced fan steel tower drum

Abstract

The utility model relates to an internal and external reverse spiral rib reinforced fan steel tower drum, which comprises a fan steel tower drum and internal and external spiral ribbing ribs arranged on the fan steel tower drum, and the internal and external spiral ribbing ribs are uniformly arranged inside and outside the fan steel tower drum by a plurality of ribbing ribs to form a reinforced structure with opposite spiral directions. The weldable metal slender material is adopted to uniformly and reversely arrange the spiral ribbing ribs along the inner side and the outer side of the fan steel tower drum, the steel tower drum can be restrained in the transverse direction and the longitudinal direction, the structural strength can be further improved, the torque resistance and the bending resistance of the fan steel tower drum are improved, and the use efficiency of the material is improved. Meanwhile, the wall thickness of a traditional steel tower drum can be reduced, the weight of the steel tower drum is reduced, cost is remarkably reduced, and the steel tower drum has wide application prospects in development of large-capacity draught fans.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation equipment technology, and in particular to wind turbine steel towers reinforced with internal and external reverse spiral ribs. Background Technology

[0002] With the rapid upgrading of wind power installations, existing wind turbine steel towers are facing problems such as insufficient structural strength and low material utilization efficiency. Therefore, it is particularly important to study a new wind turbine steel tower with sufficient structural strength and high material utilization efficiency.

[0003] While the wall thickness of traditional wind turbine steel towers is continuously increasing, the material utilization efficiency is decreasing. Current approaches employing circumferential stiffeners or longitudinal reinforcements to improve the bending resistance of wind turbine steel towers still suffer from the following drawbacks in practical engineering applications: stress concentration, with localized stress peaks easily forming at the weld between the circumferential stiffeners and the tower body, leading to fatigue cracks; complex construction, requiring dense welding or bolting connections for longitudinal reinforcements, increasing manufacturing costs and time; and uneven load distribution, as traditional orthogonal reinforcement structures struggle to evenly distribute dynamic wind loads and gravity bending moments. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a wind turbine steel tower reinforced with internally and externally reversed spiral ribs. The internally and externally reversed spirals refer to the addition of several spiral ribs to the traditional wind turbine steel tower structure, with the inner and outer spirals pointing in opposite directions. This allows for lateral and longitudinal constraint of the steel tower, further increasing structural strength, improving the torsional and bending resistance of the wind turbine steel tower, and enhancing material utilization efficiency. Simultaneously, it reduces the wall thickness of traditional steel towers, lightens the tower's weight, and significantly lowers costs.

[0005] The above-mentioned utility model objective is achieved through the following technical solution:

[0006] The wind turbine steel tower is reinforced with internal and external reverse spiral ribs, including the wind turbine steel tower and internal and external spiral ribs provided on the wind turbine steel tower. The internal and external spiral ribs are composed of a number of ribs evenly arranged along the inside and outside of the wind turbine steel tower to form a reinforcing structure with opposite spiral directions.

[0007] As a further technical solution of this utility model: the wind turbine steel tower includes a steel tower section, a lower tower flange and an upper tower flange. The upper tower flange is installed on the inner side of the top of the steel tower section, and the lower tower flange is installed on the inner side of the bottom of the steel tower section.

[0008] As a further technical solution of this utility model: the inner and outer spiral ribs include inner spiral ribs and outer spiral ribs, the inner spiral ribs are fixedly connected to the inner wall of the steel tower section, and the outer spiral ribs are fixedly connected to the outer wall of the steel tower section.

[0009] As a further technical solution of this utility model: the inner and outer spiral ribs are one of the following rigid materials: ribbed threaded steel bars, round bars, steel bars, angle steel, and steel pipes.

[0010] As a further technical solution of this utility model: the inner spiral rib is welded to the steel tower section, and the outer spiral rib is welded to the steel tower section.

[0011] As a further technical solution of this utility model: the inner and outer spiral ribs are welded and formed along the inner and outer spiral lines of the wind turbine steel tower, and are evenly and symmetrically distributed on the inner and outer sides of the wind turbine steel tower.

[0012] As a further technical solution of this utility model: the number of inner and outer spiral ribs is set to a multiple of 4 or a multiple of 8.

[0013] In summary, this utility model has at least one of the following beneficial technical effects:

[0014] This utility model discloses a wind turbine steel tower reinforced with internally and externally reversed spiral ribs. It utilizes weldable slender metal materials to uniformly and in reverse arrange spiral ribs along the inner and outer sides of the tower, constraining the tower both laterally and longitudinally. This further increases structural strength, improves the tower's torsional and bending resistance, and enhances material utilization efficiency. Simultaneously, it reduces the wall thickness and weight of traditional steel towers, significantly lowering costs and demonstrating broad application prospects in the development of large-capacity wind turbines. Attached Figure Description

[0015] Figure 1 This is a plan view of the present invention.

[0016] Figure 2 This is a front view of the present invention.

[0017] Attached reference numerals: 1. Wind turbine steel tower; 11. Steel tower section; 12. Lower flange of tower; 13. Upper flange of tower; 2. Inner and outer spiral ribs; 21. Inner spiral ribs; 22. Outer spiral ribs. Detailed Implementation

[0018] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0019] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0021] Example 1:

[0022] Reference Figure 1 The present invention discloses a wind turbine steel tower with internal and external reverse spiral ribs, including a wind turbine steel tower 1 and internal and external spiral ribs 2 disposed on the wind turbine steel tower 1. The internal and external spiral ribs 2 are composed of several ribs evenly arranged inside and outside the wind turbine steel tower 1 to form a reinforcing structure with opposite spiral directions.

[0023] In this embodiment, the manufacturing process of the wind turbine steel tower 1 adopts an existing mature processing technology. In this invention, only the cross-sectional dimensions, wall thickness and other indicators of the wind turbine steel tower 1 are optimized, but no restrictions are imposed.

[0024] Reference Figure 2 The wind turbine steel tower 1 includes a steel tower section 11, a lower flange 12, and an upper flange 13. The upper flange 13 is installed on the inner side of the top of the steel tower section 11, and the lower flange 12 is installed on the inner side of the bottom of the steel tower section 11. The inner and outer spiral ribs 2 include an inner spiral rib 21 and an outer spiral rib 22. The inner spiral rib 21 is fixedly connected to the inner wall of the steel tower section 11, and the outer spiral rib 22 is fixedly connected to the outer wall of the steel tower section 11.

[0025] Internal and external spiral ribs 2 are one type of rigid material including ribbed threaded steel bars, round bars, steel bars, angle steel, and steel pipes. Internal and external spiral ribs 2 refer to reinforcing materials made of weldable rigid metal materials, with no restrictions on cross-sectional dimensions or shapes.

[0026] The inner spiral rib 21 is welded to the steel tower section 11, and the outer spiral rib 22 is welded to the steel tower section 11. The connection method between them and the steel tower section 11 is mainly welding, but not limited to rigid connection methods such as welding.

[0027] The inner and outer spiral ribs 2 are welded together along the inner and outer spiral lines of the wind turbine steel tower 1. The preferred number of ribs is that they are evenly and symmetrically distributed inside and outside the wind turbine steel tower 1. The number of inner and outer spiral ribs 2 is set to a multiple of 4 or a multiple of 8.

[0028] The steel tower section 11 is manufactured using mature production processes, including tube joint rolling, longitudinal seam welding, circumferential seam assembly, and optimized cross-sectional dimensions and wall thickness.

[0029] The lower flange 12 of the tower is manufactured using mature technology and mainly serves to connect the upper and lower steel tower sections. Its cross-sectional dimensions and wall thickness need to match those of the steel tower section 11, and its cross-sectional dimensions and wall thickness are preferred.

[0030] The upper flange 13 of the tower is manufactured using mature technology and mainly serves to connect the upper and lower steel tower sections. Its cross-sectional dimensions and wall thickness need to match those of the steel tower section 11, and its cross-sectional dimensions and wall thickness are preferred.

[0031] The inner spiral ribs 21 are made of weldable hard metal materials, including but not limited to steel, and are evenly distributed in a spiral pattern along the inner surface of the steel tower section 11. The arrangement direction can be clockwise or counterclockwise, and the number of ribs is preferably a multiple of 4 or 8. The cross-sectional dimensions and shapes include, but are not limited to, ribbed threaded steel bars, round bars, angle steel, round steel, etc., and the cross-sectional dimensions and shapes are preferred.

[0032] The outer spiral ribs 22 are made of weldable hard metal materials, including but not limited to steel, and are evenly distributed in a spiral pattern along the outer surface of the steel tower section 11. The arrangement direction can be clockwise or counterclockwise, but it must be opposite to the arrangement direction of the inner spiral ribs 21. The preferred number of outer spiral ribs is a multiple of 4 or 8, but it must be consistent with the number of inner spiral ribs 21. Their cross-sectional dimensions and shapes include, but are not limited to, ribbed threaded steel bars, round bars, steel bars, angle steel, and round steel, with preferred cross-sectional dimensions and shapes.

[0033] The connection between the inner and outer spiral ribs 2 and the wind turbine steel tower 1 is mainly a rigid connection by welding, but it is not limited to rigid connection methods such as welding.

[0034] To facilitate understanding of this invention, a structural construction method for a wind turbine steel tower reinforced with internally and externally reversed spiral ribs is as follows:

[0035] Step 1: Determine the cross-sectional dimensions, wall thickness, length, and height of the wind turbine steel tower 1 based on the design load of the new wind turbine; determine the material, cross-sectional dimensions, and cross-sectional shape of the inner and outer spiral ribs 2; and determine the number, arrangement, and spiral angle of the inner and outer spiral ribs 2.

[0036] Step 2: Fabricate the wind turbine steel tower 1 and the inner and outer spiral ribs 2 according to the design requirements. The ribs need to be made into a spiral shape in advance. The manufacturing process is not limited and can be cold bending and hot pressing.

[0037] Step 3: Position the formed inner and outer spiral ribs 2 in space with the wind turbine steel tower 1 to ensure that the phase difference between the inner and outer spiral lines is within the design allowable range;

[0038] Step 4: Perform the welding process between the inner and outer spiral ribs 2 and the wind turbine steel tower 1, strictly control the suppression of welding deformation and the control of residual stress, and ensure that the deformation of the wind turbine steel tower 1 caused by welding meets the design and use requirements.

[0039] Step 5: Conduct quality inspection and control on the completed wind turbine steel tower 1 to ensure that the axial deviation and angular deviation of the wind turbine steel tower 1 meet the design requirements.

[0040] Step 6: Transport the matching steel tower structure with internal and external reverse spiral reinforcement to the project site as required.

[0041] Step 7: Assemble the wind turbine steel tower 1 on site according to the design requirements, install the upper blades, hub and other structures step by step, and finally put it into operation.

[0042] The implementation principle of this utility model is as follows: This utility model discloses a wind turbine steel tower reinforced with internally and externally reversed spiral ribs. It solves the problems of insufficient structural strength and low material utilization efficiency faced by existing wind turbine steel towers 1. It supplements the existing structure by using circumferential stiffening ribs or longitudinal reinforcing ribs to improve the bending resistance of the wind turbine steel tower 1, but still addresses the shortcomings that exist in actual engineering applications. The wind turbine steel tower 1 structure with internally and externally reversed spiral ribs adds several spiral ribs to the inner and outer sides of the traditional wind turbine steel tower structure. The inner and outer spirals are in opposite directions, which can constrain the steel tower in both the lateral and longitudinal directions, further increasing structural strength, improving the torsional and bending resistance of the wind turbine steel tower 1, and improving material utilization efficiency. At the same time, it can reduce the wall thickness of the traditional steel tower, reduce the weight of the steel tower, and significantly reduce costs.

[0043] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. An internally and externally reverse helical ribbed reinforced steel fan tower, characterized in that, The utility model provides a wind turbine steel tower drum (1) and the inner and outer spiral ribbed bars (2) arranged on the wind turbine steel tower drum (1), the inner and outer spiral ribbed bars (2) are arranged uniformly inside and outside the wind turbine steel tower drum (1) by several ribbed bars, and form the reinforcing structure in the opposite spiral direction.

2. The inside-out reverse helical rib reinforced wind turbine steel tower section of claim 1, wherein, The wind turbine steel tower drum (1) comprises a steel tower drum section (11), a lower flange (12) and an upper flange (13), the upper flange (13) is installed on the inner side of the top end of the steel tower drum section (11), and the lower flange (12) is installed on the inner side of the bottom end of the steel tower drum section (11).

3. The inside-out reverse helical rib reinforced wind turbine steel tower section of claim 2, wherein, The inner and outer spiral ribbed bars (2) comprise inner spiral ribbed bars (21) and outer spiral ribbed bars (22), the inner spiral ribbed bars (21) are fixedly connected to the inner wall of the steel tower drum section (11), and the outer spiral ribbed bars (22) are fixedly connected to the outer wall of the steel tower drum section (11).

4. The inside-out reverse helical rib reinforced wind turbine steel tower section of claim 1 wherein, The inner and outer spiral ribbed bars (2) are one of ribbed threaded steel bars, round bars, steel strips, angle steels and steel pipes.

5. The inside-out reverse helical rib reinforced wind turbine steel tower section of claim 3 wherein, The inner spiral ribbed bars (21) are welded to the steel tower drum section (11), and the outer spiral ribbed bars (22) are welded to the steel tower drum section (11).

6. The inside-out reverse helical rib reinforced wind turbine steel tower section of claim 1 wherein, The inner and outer spiral ribbed bars (2) are welded along the inner and outer spiral lines of the wind turbine steel tower drum (1) and are uniformly and symmetrically distributed inside and outside the wind turbine steel tower drum (1).

7. The inside-out reverse helical rib reinforced wind turbine steel tower of claim 1, wherein, The number of the inner and outer spiral ribbed bars (2) is a multiple of 4 or a multiple of 8.

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