CN112112769A

CN112112769A - Assembled wind power tower cylinder with wing wall

Info

Publication number: CN112112769A
Application number: CN202011199946.7A
Authority: CN
Inventors: 李盛勇; 徐麟; 吕坚锋; 隋晓; 丁艳
Original assignee: Guangzhou Rongbaisheng Architectural Design Consulting Co ltd
Current assignee: Guangzhou Rongbaisheng Architectural Design Consulting Co ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2020-12-22

Abstract

The invention relates to the technical field of wind power tower cylinders, and discloses an assembled wind power tower cylinder with a wing wall, which comprises: a first barrel section, a second barrel section and a plurality of wing walls; the first end of the first cylinder section is detachably connected with the first end of the second cylinder section; the wing walls are provided with lower surfaces used for being attached to the ground, the wing walls are sequentially arranged on the outer side wall of the second end of the second cylinder section in an annular mode, and the lower surfaces of the wing walls and the end face of the second end of the second cylinder section are located on the same horizontal plane; any two adjacent wing walls are arranged at intervals. According to the invention, the bottom tensile stress of the second cylinder section is effectively reduced through the wing wall, so that the stress of the whole structure of the wind power tower cylinder is more reasonable; meanwhile, the transportation and the installation are simple, convenient and quick, and the workload of operators is reduced.

Description

Assembled wind power tower cylinder with wing wall

Technical Field

The invention relates to the technical field of wind power towers, in particular to an assembled wind power tower with a wing wall.

Background

The wind power tower is an important component of the wind generating set and is used for supporting the engine room and the wind wheel, lifting the wind wheel to a corresponding height for operation and obtaining enough wind power to drive the generating set to generate electricity. With the continuous maturity of the wind power generation industry, the development of wind energy resources in low wind speed areas and middle east areas in China is intensified day by day, and the generated energy of a wind generating set can be effectively improved by increasing the height of a hub in a place with a good wind shear index, so that the height of a wind power tower barrel is a main trend. However, most of domestic wind power towers are steel towers, and the steel towers have the problems of high manufacturing cost (the cost of the steel towers is exponentially increased along with the height), easiness in corrosion, high maintenance cost, difficulty in transportation and installation and the like. In addition, because the bearing capacity and the tensile capacity of the steel tower cylinder are limited, when the height of the tower cylinder is large, the bottom of the steel tower cylinder is easy to bear stress overload and crack or buckle, and great potential safety hazards exist.

Disclosure of Invention

The purpose of the invention is: the assembled wind power tower cylinder with the wing wall is high in bottom bearing capacity, simple, convenient and fast to transport and install and capable of reducing workload of operators.

In order to achieve the above object, the present invention provides an assembled wind power tower with a wing wall, comprising: a first barrel section, a second barrel section, and a plurality of wing walls; the first end of the first cylinder section is detachably connected with the first end of the second cylinder section;

the wing walls are provided with lower surfaces used for being attached to the ground, the wing walls are sequentially arranged on the outer side wall of the second end of the second cylinder section in an annular mode, and the lower surfaces of the wing walls and the end face of the second end of the second cylinder section are located on the same horizontal plane; any two adjacent wing walls are arranged at intervals.

Further, the number n of the wing walls ranges from 4 to 16.

Further, the section of the wing wall is square or trapezoidal.

Further, the height H of the wing wall and the height H of the second barrel section satisfy the following calculation formula:

h＝(1/10～1/2)＊H。

furthermore, a door opening is formed in the side wall, located between the two adjacent wing walls, of the second barrel section.

Furthermore, the second cylinder section and the wing wall are both made of concrete, and the second cylinder section and the wing wall form an integrated structure through a pouring process.

Further, the second cylinder section is of a cylindrical cylinder structure.

Further, the first cylinder section is of a circular truncated cone-shaped cylinder structure, and the first end of the first cylinder section is the end with a larger cross section.

Further, the first end face of the first cylinder section is connected with the first end face of the second cylinder section through a flange.

Further, the first cylinder section is made of steel.

Compared with the prior art, the assembled wind power tower cylinder with the wing wall has the beneficial effects that:

in the transportation process of the fabricated wind power tower cylinder with the wing wall, the first cylinder section and the second cylinder section are split into two parts, and the first cylinder section and the second cylinder section are respectively transported to an installation site and then spliced, so that the transportation is facilitated.

Furthermore, the second cylinder section is made of a material with strong bearing capacity, such as concrete, the length of the second cylinder section can be increased to increase the overall height of the wind power tower cylinder, so that the purpose that the wind generating set obtains more wind power to improve the generating capacity is achieved, and meanwhile, the second cylinder section is free of cracking due to the existence of the prestressed steel strands, firm in structure and high in overall safety.

Further, the lateral wall of the second end of second section of thick bamboo section is fitted with a contraceptive ring and is equipped with a plurality of wing walls, and the lower surface of wing wall and the second end terminal surface of second section of thick bamboo section are located same horizontal plane to make the second end terminal surface of second section of thick bamboo section and the lower surface of wing wall laminate ground simultaneously, increased wind power tower section of thick bamboo bottom and ground area of contact in order to improve holistic stability, the wing wall can effectively reduce the bottom tensile stress of second section of thick bamboo section simultaneously, make overall structure atress more reasonable. The second barrel section is the same as the wing wall in material, can be concrete material, adopts the technology of pouring at the installation place to become integral structure, and sound construction just makes the transportation more convenient.

Drawings

FIG. 1 is a schematic structural view of an assembled wind tower with a wing wall according to the present invention;

FIG. 2 is a schematic structural view of a second barrel section and wing wall of the present invention;

FIG. 3 is a schematic illustration of the first and second barrel sections of the present invention shown disassembled;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a graph of floor displacement for a model of an assembled wind tower with a wing wall of the present invention.

In the figure, 1-first barrel section, 11-flange;

2-a second cylinder section, 21-embedded bolts, 22-pore canals and 23-prestressed steel strands;

3-wing walls;

4-door opening.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the present invention, the barrel section or barrel is a hollow structure having openings at both ends, and includes a cylinder, a square cylinder, or the like, and preferably has a cylindrical structure.

As shown in fig. 1, a schematic structural diagram of an assembled wind power tower with a wing wall according to a preferred embodiment of the present invention is shown. Specifically, the fabricated wind power tower with the wing wall comprises a first barrel section 1, a second barrel section 2 and a plurality of wing walls 3; the first end of the first cylinder section 1 is detachably connected with the first end of the second cylinder section 2; the wing walls 3 are provided with lower surfaces for being attached to the ground, the wing walls 3 are sequentially arranged on the outer side wall of the second end of the second cylinder section 2 in a surrounding mode, and the lower surfaces of the wing walls 3 and the end face of the second end of the second cylinder section 2 are located on the same horizontal plane; any two adjacent wing walls 3 are arranged at intervals.

The wing walls are arranged on the outer side wall of the second barrel section 2 in an encircling manner, and the purpose of increasing the contact area of the wind power tower barrel and the ground is to improve the overall stability.

Further, first section of thick bamboo 1 is the metal material, and it is used for connecting wind generating set's cabin and wind wheel and plays the fixed effect of support, therefore first section of thick bamboo 1 can select to be steel material, fixes cabin and wind wheel on first section of thick bamboo 1 through the welded mode. The second cylinder section 2 is made of a material with high bearing capacity, can be made of a concrete material, and is long enough to increase the overall height of the wind power tower cylinder by increasing the length of the second cylinder section 2, so that the wind power generator unit can obtain more wind power to improve the generated energy, and meanwhile, the second cylinder section 2 is firm in structure and improves the overall safety because the prestressed steel strands 23 cannot crack. The material of wing wall 3 is the same with the material of second barrel section 2, can select for the concrete material, and wing wall 3 can be after second barrel section 2 construction is accomplished, during the stretch-draw prestressing force steel strand wires, adopts pouring technology and second barrel section 2 formation integral structure, and effective reduction of erection time and transportation are more convenient. Wherein, the second end of second section of thick bamboo 2 is provided with many first connecting reinforcement with self integrated into one piece along its circumference interval, and one side of wing wall 3 also is provided with the second connecting reinforcement with self integrated into one piece, and a plurality of wing walls 3 pour the concrete after connecting respectively with the first connecting reinforcement interconnect of second section of thick bamboo 2 through the second connecting reinforcement of self to make wing wall 3 and second section of thick bamboo 2 form the integral structure through pouring technology.

Further, referring to fig. 3, the first tube section 1 is preferably a circular truncated cone-shaped tube structure, and the connection stability of the first tube section 1 and the second tube section 2 can be improved by reducing the wind-receiving area of the first tube section 1 under the condition that the installation requirements of the nacelle and the wind wheel on the first tube section 1 are met.

Because the second section of thick bamboo 2 is the main support position of the assembled wind power tower section of thick bamboo of winged wall, length dimension is great, the second section of thick bamboo 2 of reducing is comparatively troublesome in hoist and mount and transportation, consequently the preferred cylindric tubular structure of second section of thick bamboo 2, the cross sectional area of second section of thick bamboo 2 is even the same, add man-hour, will cut apart into the same sub-section of a plurality of sizes (or the sub-section of unified standard size) of second section of thick bamboo 2 earlier and prefabricate in the mill, splice into second section of thick bamboo 2 after transporting sub-section to the installation site afterwards. The sub-cylinder section with smaller length size can greatly reduce the transportation difficulty.

The other construction mode is that a reinforcement cage is prefabricated according to the structure of the second cylinder section 2, the reinforcement cage is transported to the site for assembly, and concrete is poured by adopting a creeping formwork construction method to form the second cylinder section 2.

As an embodiment of the present invention, an end surface of the first cylinder section 1 with a larger cross section is connected to an end surface of the second cylinder section 2 through a flange, so that one end of the second cylinder section 2 is detachably connected to one end of the first cylinder section 1. Specifically, referring to fig. 3 and 4, a flange plate 11 is integrally formed on the end face of the first cylinder section 1 with the larger cross section, a plurality of pre-embedded bolts 21 are integrally formed on the end face of the second cylinder section 2 through a pouring process, one ends of the pre-embedded bolts 21 protrude out of the end face of the second cylinder section 2, and the first cylinder section 1 and the second cylinder section 2 are clamped and fixed in through holes of the flange plate 11 in a one-to-one manner through the plurality of pre-embedded bolts 21 in an interference fit manner, so that flange connection between the first cylinder section 1 and the second cylinder section 2 is realized. Preferably, in order to improve the overall structural strength of the second cylinder section 2, the second cylinder section 2 is provided with a plurality of pore channels 22 at intervals along the circumferential direction of the second cylinder section 2, each pore channel 22 is pre-embedded with a prestressed steel strand 23, wherein the prestressed steel strand 23 is fixed on the end surface of the second cylinder section 2 in an anchoring manner, and the prestressed steel strand 23 is used to effectively improve the tensile capacity of the second cylinder section 2.

The number n of the wing walls 3 of the present invention is designed to correspond to the diameter of the second cylinder section 2, and the diameter of the second cylinder section 2 is generally 4000-6000 mm, so the number n of the wing walls 3 of the present invention is in the range of 4-16. When the number of the wing walls 3 is too small, the capability of the wing walls 3 for reducing the tensile stress at the bottom of the second cylinder section 2 is insufficient, so that the side wall of the second cylinder section 2 is easy to crack; when the number of the wing walls 3 is too large, the material consumption is too large, and the manufacturing cost is high.

Further, referring to fig. 2, the wing wall 3 has a square or trapezoidal cross section. When the cross section of the wing wall 3 is trapezoidal, the surface with a large area of the wing wall 3 and the second end face of the second cylinder section 2 are located on the same horizontal plane, so that the effect of reducing the tensile stress at the bottom of the second cylinder section 2 by the wing wall 3 is enhanced.

Further, the height H of the wing wall 3 of the present invention is designed to correspond to the height H of the second barrel section 2, and the height H of the wing wall 3 and the height H of the second barrel section 2 satisfy the following calculation formula: h is (1/10-1/2) H, so that the effect of reducing the bottom tensile stress of the second cylinder section 2 by the wing wall 3 is effectively ensured.

Further, the second barrel section 2 is provided with a door opening 4 on the side wall between two adjacent wing walls 3, and the door opening 4 is used for the entrance and exit of materials, equipment and personnel. The number of the door openings 4 can be selected to be one or more.

The following steps are modeling the variable-section fabricated wind power tower with the wing wall by adopting MIDAS software, and analyzing the stress load bearing condition of the variable-section fabricated wind power tower.

The parameters of the assembled wind power tower with the wing wall are preferably as follows: the vertical height of the first cylinder section 1 is 10m, the wall thickness is 25mm, the diameter is 3500-5000 mm, the vertical height of the second cylinder section 2 is 110m, the wall thickness is 500/600m, the diameter is 5000mm, the height of the wing wall 3 is 20m, the length is 1500mm, and the thickness is 500 mm.

Apply fan load, the power of three direction and the moment of flexure of three direction to first section of thick bamboo 1, wherein, the parameter of outside wind field is: the basic wind pressure is 0.85kN/m²And the damping ratio for wind load calculation was 5%. And meanwhile, the wind power towers are arranged into a standard layer at intervals of 5 m.

And (4) analyzing results: referring to fig. 5, the deformation of the fabricated wind power tower with the wing wall is a bending type, the maximum displacement of the first tower section 1 is 574mm, the corresponding displacement angle is 1/209, and is smaller than the displacement angle limit (1/200) specified in the technical specification of prestressed cast-in-place concrete tower of wind generating set (T/CEC 5007 and 2018), and meets the design requirements of the specification. Meanwhile, the section stress of the upper part of the wing wall 3 and the bottom of the wind power tower cylinder is larger, but the section compressive stress is smaller than the compressive strength of the concrete.

To sum up, the embodiment of the invention provides an assembled wind power tower cylinder with a wing wall, in the transportation process, a first cylinder section 1 and a second cylinder section 2 are split into two parts, and the first cylinder section 1 and the second cylinder section 2 are respectively transported to an installation site and then spliced together, so that the transportation is facilitated. Furthermore, the second cylinder section 2 is made of a material with a strong bearing capacity, such as concrete, the length of the second cylinder section 2 can be increased to increase the overall height of the wind power tower cylinder, so that the wind generating set can obtain more wind power to improve the generating capacity, and meanwhile, the second cylinder section 2 is firm in structure and improves the overall safety due to the fact that the prestressed steel strands cannot crack. Further, the lateral wall of the second end of second barrel section 2 is fitted with a contraceptive ring and is equipped with a plurality of wing walls 3, and the lower surface of wing wall 3 and the second end terminal surface of second barrel section 2 lie in same horizontal plane, so that the second end terminal surface of second barrel section 2 and the lower surface of wing wall 3 laminate ground simultaneously, the area of contact of wind power tower bottom and ground has been increased in order to improve holistic stability, wing wall 3 can effectively reduce the bottom tensile stress of second barrel section 2 simultaneously, make the overall structure atress more reasonable. The second cylinder section 2 is the same as the wing wall 3 in material, can be concrete material, adopts the technology of pouring to become the integral structure in the installation place, and sound construction just makes the transportation more convenient.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides an assembled wind power tower cylinder of winged wall which characterized in that includes: a first barrel section, a second barrel section, and a plurality of wing walls; the first end of the first cylinder section is detachably connected with the first end of the second cylinder section;

2. The fabricated wind tower of claim 1, wherein the number n of wing walls ranges from 4 to 16.

3. The fabricated wind tower of claim 1, wherein the wing wall is square or trapezoidal in cross-section.

4. The fabricated wind tower of claim 3, wherein the height H of the wing wall and the height H of the second segment satisfy the following equation:

h＝(1/10～1/2)＊H。

5. the fabricated wind tower of claim 1, wherein the second segment defines a door opening in a side wall between two adjacent wing walls.

6. The fabricated wind power tower of any one of claims 1 to 5, wherein the second tube section and the wing wall are made of concrete, and the second tube section and the wing wall form an integrated structure through a casting process.

7. The fabricated wind tower of any one of claims 1 to 5, wherein the second segment is a cylindrical barrel structure.

8. The fabricated wind tower as claimed in any one of claims 1 to 5, wherein the first tube section is of a truncated cone-shaped tube structure, and the first end of the first tube section is an end with a larger cross section.

9. The fabricated wind tower of claim 8, wherein the first end face of the first barrel section is flanged to the first end face of the second barrel section.

10. The fabricated wind tower of claim 8, wherein the first segment is steel.