CN214741846U

CN214741846U - Assembled wind turbine generator system circle cross section concrete bearing structure

Info

Publication number: CN214741846U
Application number: CN202022846835.2U
Authority: CN
Inventors: 黄小刚; 任为; 李守振; 王宇航
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-11-16
Anticipated expiration: 2030-12-01

Abstract

The utility model discloses an assembled wind turbine generator system circle section concrete bearing structure, including at least one constitutional unit, the constitutional unit includes concrete tower section, tower section interior longitudinal reinforcement, goes up ring flange, lower ring flange, goes up prestressing force steel strand wires, prestressing force steel strand wires down, high strength bolt, tower section longitudinal reinforcement and upper and lower ring flange body casting formation whole frame, and concrete placement is between upper and lower ring flange to wrap up tower section longitudinal reinforcement in, upper and lower prestressing force steel strand wires link to each other a plurality of constitutional unit hoop through pretension, upper and lower ring flange passes through high strength bolt and links to each other a plurality of constitutional unit is vertical, makes it whole to form round platform shape. The utility model discloses the wholeness and the installation effectiveness of a concrete tower section of thick bamboo have effectively been improved when satisfying the requirement is assembled to mill's burst prefabrication, scene is whole.

Description

Assembled wind turbine generator system circle cross section concrete bearing structure

Technical Field

The utility model belongs to the civil engineering field relates to an assembled wind turbine generator system circle cross-section concrete bearing structure.

Background

China has become the largest carbon dioxide emitting country in the world since 2007, and the growing energy demand is in conflict with the severe energy-saving and emission-reducing task. China has abundant land wind energy resources, and the development of wind power energy becomes an important component of the national energy structure transformation strategy. In order to obtain stable generating capacity, the wind turbine generator is erected in the air through a supporting structure. In recent years, the single-machine capacity, the hub height and the wind wheel diameter of the wind power structure are gradually improved, and the traditional conical steel tower supporting structure is limited in bearing capacity and is more and more difficult to meet the trend of large-scale development of the wind power structure. First, the increase in wall thickness of the circular steel tube has limited contribution to the lateral stiffness of the member, and the increase in diametral length is limited by processing costs and shipping conditions. Secondly, the local buckling of the section of the circular steel tube can cause the bending resistance of the section to be rapidly reduced, and the bending resistance is more serious along with the increase of the diameter-thickness ratio.

The manufacturing cost of each cubic of concrete is less than one tenth of that of each ton of steel, the introduction of the concrete reduces the steel consumption of the supporting structure, and the application limitation of the wind power structure caused by the problems of cost and the like is favorably broken through. In order to reduce the transportation size and the hoisting weight, the concrete tower drum generally needs to be prefabricated in a factory in a segmented mode and integrally assembled on site, but the horizontal joint and the vertical joint which are generated by the method not only damage the structural integrity, but also influence the construction quality and the construction progress. For example, wet connection of filling joints by grouting material trowelling is often unable to be checked by visual inspection because of the construction quality inside the sealing strip, and construction is also interrupted because the strength is difficult to improve during winter construction. The utility model discloses form the frame with tower section longitudinal reinforcement and the integrative casting of connection flange dish, form wholly through hoop prestressing tendons stretch-draw again, not only improved the ductility and the stability of a tower section of thick bamboo, still improved the installation effectiveness of each tower section, realized "high wholeness" and "swift construction" effective compatible. The excessively high installation accuracy requirement and the adverse effect of winter construction are avoided.

SUMMERY OF THE UTILITY MODEL

The technical problem is as follows: the utility model provides a can effectively strengthen wholeness, improve efficiency of construction's assembled wind turbine generator system circle cross section concrete bearing structure.

The technical scheme is as follows: the utility model provides an assembled wind turbine generator system circle cross section concrete bearing structure, this structure comprises the same constitutional unit of a plurality of, constitutional unit includes concrete tower section, last ring flange, lower ring flange, many longitudinal reinforcement, a plurality of high strength bolt that link to each other last ring flange and lower ring flange, be located the last prestress wire on constitutional unit upper portion, be located the lower prestress wire of constitutional unit lower part. The upper flange plate, the lower flange plate and the longitudinal steel bars are integrally cast, and two rows of bolt holes which are uniformly distributed are reserved in the upper flange plate and the lower flange plate. And the concrete tower section is poured between the upper flange plate and the lower flange plate, and the longitudinal steel bars are wrapped in the concrete tower section.

Furthermore, an upper prestressed duct and a lower prestressed duct which are communicated along the cross section are reserved at the top and the bottom of the concrete tower section and are respectively used for penetrating through the upper prestressed steel strand and the lower prestressed steel strand, and the upper prestressed steel strand and the lower prestressed steel strand are prestressed in advance by a certain initial prestress. And an upper groove and a lower groove are reserved in the middle parts of the upper prestressed duct and the lower prestressed duct and are respectively used for anchoring the upper prestressed steel strand and the lower prestressed steel strand.

Furthermore, the structure comprises a plurality of structural units which are connected in sequence through prestressed steel strands in the horizontal direction to form a circular section.

Furthermore, the structure comprises a plurality of structural units which are connected in pairs in the vertical direction through high-strength bolts in the flange plates.

Furthermore, a plurality of constitutional units form the whole tower section of thick bamboo that from the bottom up circle cross-section diminishes gradually after mutually connecting in horizontal direction and vertical direction.

Has the advantages that: compared with the prior art, the utility model, have following advantage:

(1) the utility model discloses a full dry-type connected mode of ring flange heightening bolt and prestressing force steel strand hoop has greatly improved on-the-spot assembly efficiency. The wet connection of the grouting material needs to wait for the next section of hoisting after the wet connection reaches a certain strength, the field installation efficiency is low, and the construction is also interrupted because the strength is difficult to improve during the construction in winter. And this utility model realizes the connection of horizontal seam and vertical seam through ring flange bolt and hoop prestressing force steel strand wires respectively, and assembly efficiency improves greatly.

(2) The utility model discloses a ring flange and the integrative cast scheme of longitudinal reinforcement have reduced the machining precision requirement, remove on-the-spot levelness adjustment link from. The aspect ratio of the tower is very different, and the dry connection is often difficult to construct due to poor levelness of the prefabricated parts, and a large amount of time is spent on grinding on site to adjust the levelness. The utility model discloses with the integrative casting of longitudinal reinforcement and ring flange, utilize interval and the levelness of ring flange about the longitudinal reinforcement is fixed for the prefabricated component precision is higher.

(3) The utility model discloses can effectively strengthen the viability of tower section of thick bamboo structure under extreme calamities. The section bending moment generated by the tower barrel due to the large height is also very large, and when no steel bars are connected at the joints of the adjacent subsections, the ductility and the energy consumption capability of the joints are low under extreme disasters such as earthquake and typhoon, irreversible brittle damage is easy to occur, the repair is difficult, and the collapse of the tower barrel is easy to cause. The utility model discloses not only can make the interior concrete of tower section be in the hoop pressurized state, can also make the interior reinforcing bar of tower section participate in the power consumption, improved tower section of thick bamboo bearing structure's antidumping ability under the extreme calamity greatly.

Drawings

Fig. 1 is a three-dimensional schematic view (concreting) of the present invention;

FIG. 2 is a front view of the present invention (cast concrete);

FIG. 3 is a three-dimensional schematic view of the present invention (no concrete poured);

FIG. 4 is a front view of the present invention (no concrete poured);

FIG. 5 is a front view of the high-strength bolt;

FIG. 6 is a front view of the upper and lower flanges;

FIG. 7 is a horizontal sectional assembly view of 4 structural units;

FIG. 8 is an assembled view of the support structure made up of 12 structural units;

the figure shows that: the concrete tower comprises a concrete tower section 1, an upper prestressed duct 11, a lower prestressed duct 12, an upper groove 13, a lower groove 14, an upper flange plate 2, a lower flange plate 3, tower section longitudinal steel bars 4, high-strength bolts 5, upper prestressed steel strands 6, lower prestressed steel strands 7 and bolt holes 8.

Detailed Description

Referring to fig. 1-6, this embodiment discloses the utility model provides an assembled wind turbine generator system circle cross section concrete bearing structure, when the bearing structure cross section is great, can divide into a plurality of constitutional units with bearing structure along the hoop and prefabricate, when the bearing structure height is great, can divide into a plurality of constitutional units with bearing structure along vertically and prefabricate. The structural unit comprises a concrete tower section 1, an upper flange plate 2 and a lower flange plate 3 which are identical in structure, a plurality of longitudinal steel bars 4 which connect the upper flange plate 2 and the lower flange plate 3, a plurality of high-strength bolts 5, an upper prestressed steel strand 6 positioned on the upper portion of the tower section, and a lower prestressed steel strand 7 positioned on the lower portion of the tower section.

In this embodiment, the upper flange 2, the lower flange 3 and the longitudinal steel bar 4 are integrally cast, the concrete tower section 1 is poured between the upper flange 2 and the lower flange 3, the longitudinal steel bar 4 is wrapped inside, and two rows of evenly distributed bolt holes 8 are reserved in the upper flange 2 and the lower flange 3. A through upper prestressed duct 11 is reserved at the top of the concrete tower section 1, a through lower prestressed duct 12 is reserved at the bottom of the concrete tower section, and an upper groove 13 and a lower groove 14 are respectively arranged in the middle positions of the upper duct and the lower duct. The upper prestressed steel strand 6 and the upper prestressed steel strand 7 are respectively placed in the upper prestressed duct 11 and the lower prestressed duct 12, and the upper groove and the lower groove are used for anchoring the prestressed steel strands and are conveniently led out to penetrate through the whole cross section. The upper prestressed steel strand 6 and the lower prestressed steel strand 7 are prestressed to a certain degree.

In this embodiment, after the structural units are fabricated in the above manner, the structural units can be connected together to form an integral support structure as shown in fig. 7-8. Specifically, during on-site installation, if a plurality of structural units are closed because of the unable hoop of manufacturing error, can suitably paint epoxy and make level, then stretch-draw prestressing force steel strand wires along the hoop for each hoop structural unit connects to become one section whole. And then connecting a plurality of structural units spliced into a ring vertically, placing the high-strength bolts into the reserved bolt holes on the flange plates, and applying pretightening force to connect the adjacent flange plates to form an integral supporting structure.

Claims

1. A concrete supporting structure for a circular section of an assembled wind turbine generator is composed of a plurality of same structural units, each structural unit comprises a concrete tower section (1), an upper flange plate (2), a lower flange plate (3), a plurality of longitudinal steel bars (4) connecting the upper flange plate (2) with the lower flange plate (3), a plurality of high-strength bolts (5), upper prestressed steel strands (6) positioned at the upper part of the tower section and lower prestressed steel strands (7) positioned at the lower part of the tower section, the upper flange plate (2), the lower flange plate (3) and the longitudinal steel bars (4) are integrally cast, the concrete tower section (1) is cast between the upper flange plate (2) and the lower flange plate (3) and wraps the longitudinal steel bars (4), and double rows of bolt holes (8) which are uniformly distributed are reserved in the upper flange plate (2) and the lower flange plate (3), the upper prestressed steel strand (6) and the lower prestressed steel strand (7) are prestressed in advance to a certain initial prestress.

2. The assembled wind turbine generator circular section concrete supporting structure according to claim 1, wherein an upper prestressed channel (11) and a lower prestressed channel (12) which are through along the cross section are reserved at the top and the bottom of the concrete tower section (1) and are respectively used for penetrating through the upper prestressed steel strand (6) and the lower prestressed steel strand (7), and an upper groove (13) and a lower groove (14) are reserved in the middle of the upper prestressed channel (11) and the lower prestressed channel (12) and are respectively used for anchoring the upper prestressed steel strand (6) and the lower prestressed steel strand (7).

3. The fabricated wind turbine circular section concrete support structure of claim 1, characterized in that the structure comprises a plurality of structural units which are connected in sequence in a horizontal direction through prestressed steel strands to form a circular section.

4. Assembled wind turbine round section concrete support structure according to claim 1, characterized in that it comprises a plurality of structural units connected in pairs in the vertical direction by high-strength bolts (5) in flanges.

5. The fabricated wind turbine circular cross-section concrete support structure of claim 1, wherein a plurality of structural units are connected with each other in a horizontal direction and a vertical direction to form an integral tower with a circular cross section gradually decreasing from bottom to top.