CN111022267A - A hybrid wind power tower based on segmented prestressed multi-cavity composite shell - Google Patents
A hybrid wind power tower based on segmented prestressed multi-cavity composite shell Download PDFInfo
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- CN111022267A CN111022267A CN201911377228.1A CN201911377228A CN111022267A CN 111022267 A CN111022267 A CN 111022267A CN 201911377228 A CN201911377228 A CN 201911377228A CN 111022267 A CN111022267 A CN 111022267A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/22—Foundations specially adapted for wind motors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
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Abstract
The invention discloses a hybrid wind power tower cylinder based on a segmented prestress multi-cavity combined shell, and relates to the technical field of wind power generation. The system consists of an upper pure steel tower cylinder and a lower combined tower cylinder, wherein the pure steel tower cylinder and the combined tower cylinder are connected through bolts, and prestress is applied to the bottom of the pure steel tower cylinder. The combined tower cylinder is formed by connecting multiple cavities of partitioned combined shells by bolts along the circumferential direction to form a cylinder body and assembling the combined shell in a segmented mode along the vertical direction, the number of the partitioned partitions along the circumferential direction is gradually reduced from bottom to top, and the bottom of each section of combined tower cylinder is connected with a foundation through prestressed ribs. The multi-cavity combined shell is formed by pouring concrete into an inner cavity of a multi-cavity box-shaped section formed by cold bending and welding steel plates, and a horse tooth twisting and stiffening area, an embedded screw, a prestressed tendon anchoring plate and the like are arranged at the edge of the multi-cavity combined shell. The system gives full play to the stress characteristics of high bearing capacity and good stability of the combined structure, can realize the segmented prestress application, has short construction period and less material consumption, and has wide engineering application prospect.
Description
Technical Field
The invention relates to the technical field of wind power generation.
Background
At present, the energy development of China is in the key period of deep revolution and great adjustment. In order to cope with climate change, China promises that the carbon emission intensity is reduced by 40 to 45 percent in 2005, the non-fossil energy accounts for 15 percent in 2020, and the non-fossil energy accounts for 20 percent in 2030. To achieve this tactical goal, there is a strong need to develop clean renewable energy sources. The wind power energy is a new energy without pollution and capable of being regenerated, and has obvious advantages compared with the traditional non-renewable resources such as petroleum, coal and the like. The development potential of wind energy in China is huge, new wind power energy is developed, the method is an important strategic choice for promoting the power generation technical progress and industrial upgrading in China and promoting the energy structure adjustment in China and building a resource-saving and environment-friendly society.
The peak regulation capability of an electric power system in the high wind speed areas of the three northeast of China is seriously insufficient, the power grid absorption capability is limited, and the problem of wind abandon and electricity limiting is prominent, while the low wind speed areas of the middle east and the south of China are close to economically developed areas, and the wind power can be absorbed on site. In order to obtain larger wind speed, improve the generated energy and strengthen the development of wind power resources in a low wind speed area, the height of a tower cylinder structure of a wind turbine generator needs to be greatly improved, and the traditional steel tower cylinder is limited due to the reasons of smaller lateral stiffness, poorer stability, lower bearing capacity and the like. Therefore, in recent years, hybrid wind power towers are applied to a certain extent, the traditional hybrid tower is composed of an upper pure steel tower and a lower precast concrete tower, but in the actual application process, the lower concrete tower is prone to cracking under the action of complex stress, the precast concrete tower needs to be grouted on the joint in site, the process is complex, and the construction period is long.
In order to further promote the development of wind energy resources in a low wind speed area, the traditional tower structure is improved, and the novel hybrid wind power tower has important significance. The combined structure can give full play to the material characteristics of steel and concrete, and has excellent mechanical properties such as good stability, large rigidity, high bearing capacity, good fatigue resistance and the like. Based on the mechanical mechanism of the combined structure, the invention provides the hybrid wind power tower cylinder based on the segmented prestress multi-cavity combined shell, which can overcome the defects of the traditional concrete tower cylinder, has the advantages of excellent mechanical property, reliable connection, convenience in construction and the like, and has a wide engineering application prospect.
Disclosure of Invention
The invention provides a hybrid wind power tower cylinder based on a segmented prestress multi-cavity combined shell, which comprises the following components in percentage by weight: the system consists of an upper pure steel tower drum and a lower combined tower drum. The combined tower barrel is assembled by the multi-cavity combined shell of the split pieces along the annular direction to form a barrel body and is assembled along the vertical section, and the number of the split pieces of the multi-cavity combined shell of each section of combined tower barrel along the annular direction is gradually reduced from bottom to top. The steel plate forms a multi-cavity box-shaped section through processes of cold bending, welding and the like, and also can form a box-shaped section through welding of a plurality of sections of flat steel plates, then concrete is poured in an inner cavity of the multi-cavity box-shaped section to form a multi-cavity combined shell, the concrete is divided into a plurality of areas through the inner steel plate with the box-shaped section, the restraint effect of the steel plate on the concrete is increased, the combination effect can be fully exerted, meanwhile, the inner steel plate can play a role of a stiffening rib, and buckling of the inner steel plate and the outer steel plate is. The multi-cavity combined shell is provided with stiffening areas and embedded screws at the edges, and the stiffening areas at the left side and the right side are arranged in a tooth rubbing mode to ensure that the tower barrel is more reliably connected. The bottom of each vertical section of combined tower barrel is connected with the foundation through the prestressed tendons, so that the prestress can be reduced section by section from bottom to top.
The system gives full play to the stress characteristics of high bearing capacity and good stability of the combined structure, can realize segmented prestress application, segment-by-segment reduction of the number of segments from bottom to top, discontinuous vertical splicing seams, safe and reliable connection, short construction period, material consumption saving and wide engineering application prospect, and all components can be prefabricated in a factory and assembled on site.
The technical scheme of the invention is as follows:
the utility model provides a mix wind power tower section of thick bamboo based on segmentation prestressing force multicavity combination casing, this system includes pure steel tower section of thick bamboo, combination tower section of thick bamboo, multicavity combination casing, prestressing tendons, ground tackle, outside steel sheet, inboard steel sheet, concrete, inside steel sheet, end plate, connecting plate, stiffening plate, prestressing tendons anchor plate, pre-buried screw rod, bolt, hoop stiffening plate, basis, flange board.
The system consists of an upper pure steel tower cylinder and a lower combined tower cylinder, wherein the pure steel tower cylinder and the combined tower cylinder are connected through bolts, prestress is applied to the bottom of the pure steel tower cylinder, so that the pure steel tower cylinder and the combined tower cylinder are tightly connected, and a transfer ring device in the traditional mixed tower cylinder can be omitted in the structural connection mode, so that the force transfer path is more definite, and the stress is more reasonable.
The combined tower cylinder is formed by assembling a plurality of cavity combined shells which are divided into pieces in the circumferential direction by adopting bolts to form a cylinder body and assembling the combined tower cylinder along the vertical direction in a segmented manner. The number of the sub-pieces of the multi-cavity combined shell of each section of combined tower barrel along the annular direction is gradually reduced from bottom to top, the vertical splicing seams of the combined tower barrels can be prevented from being communicated by the different sub-pieces, and the integrity of the combined tower barrel is improved.
The bottom of each section of combined tower barrel is connected with the foundation through the prestressed tendons, so that the prestressed force in the combined tower barrel is reduced section by section from bottom to top, the distribution rule of the bending moment of the combined tower barrel under the action of external force is the same as the distribution rule of the bending moment of the combined tower barrel along the vertical direction, the stress requirement is met, the using amount of the prestressed tendons can be reduced, the length of the prestressed tendons is shortened, the tensile stress of the prestressed tendons is reduced, the problems that the prestressed tendons are seriously loosened due to overlong prestressed tendons and overlarge tensile stress are effectively solved, and stress concentration caused by anchoring all the prestressed tendons at the same position is avoided.
The multi-cavity combined shell is formed by forming a multi-cavity box-shaped section by steel plates through processes of cold bending, welding and the like, or forming the box-shaped section by welding a plurality of sections of flat steel plates, and then pouring concrete into an inner cavity of the multi-cavity combined shell. The inside steel sheet through box cross-section separates into a plurality of regions with the concrete, has increased the steel sheet and to the constraint effect of concrete, makes its combined effect can obtain abundant performance, and inside steel sheet can play the effect of putting more energy into and bearing simultaneously, can prevent inside and outside steel sheet buckling and improve the vertical bearing capacity of combination casing. In addition, the multicavity combination casing can solve traditional combination tower section of thick bamboo and need arrange the drawback of peg in a large number, reduces the cost.
The multi-cavity combined shell is provided with the stiffening areas and the embedded screws at the edges, the stiffening areas at the left and right sides are arranged in a horse tooth rubbing mode to ensure that the connection of the tower barrel is more reliable, the integrity of the tower barrel is increased, and the multi-cavity combined shell of the segments under the shearing force action is prevented from moving along the vertical direction. The multi-cavity combined shells of the segments are connected through the pre-buried screw rods and the bolt holes reserved on the connecting plates through bolts to form a combined tower barrel.
Compared with the prior art, the invention has the following beneficial effects:
(1) the steel tower cylinder and the combined tower cylinder are directly connected through bolts and prestressed ribs, a switching ring of the traditional mixed tower cylinder is omitted, the force transmission path is clear, and the stress mode is reasonable.
(2) The number of the circumferential sub-pieces of each section of combined tower barrel is gradually reduced from bottom to top, so that the vertical splicing seams of the combined tower barrel can be prevented from being communicated, and the integrity of the combined tower barrel is improved.
(3) The bottom of each section of combined tower barrel is connected with the foundation through the prestressed tendons, the prestress in the combined tower barrel is reduced section by section from bottom to top, the using amount of the prestressed tendons can be reduced, the problem that the prestressed tendons are seriously loosened due to overlong prestressed tendons and overlarge tension stress is solved, and stress concentration caused by anchoring all the prestressed tendons at the same part is avoided.
(4) The multi-cavity combined shell steel plate has a strong constraint effect on concrete, the combination effect is fully exerted, the defect that a large number of studs need to be arranged in the traditional combined tower cylinder is avoided, and the combined tower cylinder formed by assembling the multi-cavity combined shell steel plate has the advantages of high bearing capacity, good stability, high rigidity, material saving and the like.
(5) The connection mode between the multi-cavity combined shells is convenient to construct, reasonable in force transmission and reliable in connection.
(6) All components of the system are transported to the site after being prefabricated in a factory, and the system is assembled in a construction site in a bolt connection mode and the like, so that the system is convenient to construct, environment-friendly and capable of greatly shortening the construction period; the tower barrel is prefabricated in a slicing and segmenting mode, and is convenient to transport, stack and hoist.
Drawings
FIG. 1 is an overall schematic view of the present invention;
FIG. 2 is a schematic illustration of the segmented prestressing of the present invention;
FIG. 3 is an overall view of the multi-chamber combination housing and its detailed structure;
FIG. 4 is a schematic view of the vertical splicing of the multi-cavity combination housing of the present invention;
FIG. 5 is a schematic diagram of circumferential splicing of a multi-chamber combination housing according to the present invention;
FIG. 6 is a schematic bottom view of a pure steel tower of the present invention;
in the figure: 1-pure steel tower cylinder, 2-combined tower cylinder, 3-multi-cavity combined shell, 4-prestressed tendons, 5-anchorage device, 6-outer steel plate, 7-inner steel plate, 8-concrete, 9-inner steel plate, 10-end plate, 11-connecting plate, 12-stiffening plate, 13-prestressed tendon anchoring plate, 14-embedded screw, 15-bolt, 16-annular stiffening plate, 17-foundation and 18-flange plate
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in figure 1, the hybrid wind power tower cylinder based on the segmented prestress multi-cavity combined shell is composed of a pure steel tower cylinder (1) at the upper part and a combined tower cylinder (2) at the lower part, the combined tower cylinder (2) is assembled by segmented multi-cavity combined shells (3) along the annular direction to form a cylinder body and is assembled by segmentation along the vertical direction, and the number of the segments of each segmented combined tower cylinder (2) along the annular multi-cavity combined shell (3) is gradually reduced from bottom to top.
As shown in figure 2, the bottoms of the pure steel tower tube (1) and each section of the combined tower tube (2) are connected with a foundation (17) through prestressed tendons (4), and the prestressed tendons (4) are uniformly distributed along the annular direction.
As shown in fig. 3, the multi-cavity combined shell (3) is formed by cold-bending and welding steel plates to form a multi-cavity box-shaped section, or by welding a plurality of sections of flat steel plates to form a box-shaped section, and then pouring concrete (8) into the inner cavity of the multi-cavity combined shell; an end plate (10) is welded on the upper side of the multi-cavity combined shell (3), a hole is formed in the end plate (10), and a pre-embedded screw (14) is welded at the hole; holes are formed in corresponding positions of the left side and the right side of the multi-cavity combined shell (3) and embedded screws (14) are welded at the holes; welding stiffening plates (12) and connecting plates (11) on the left side and the right side of the multi-cavity combined shell (3) to form stiffening areas in a horse-tooth rubbing mode, and reserving bolt holes on the connecting plates (11); welding a prestressed tendon anchoring plate (13), a connecting plate (11) and a stiffening rib (12) at the lower part of the multi-cavity combined shell (3), reserving a bolt hole on the connecting plate (11), and reserving a prestressed tendon hole on the prestressed tendon anchoring plate (13); the prestressed tendons (4) penetrate through prestressed tendon holes reserved on the prestressed tendon anchoring plates (13) and are anchored on the upper sides by anchors (5).
As shown in fig. 4, the pre-embedded screws (14) on the upper side of the multi-cavity combined shell (3) penetrate through the reserved bolt holes on the lower connecting plate (11), and are vertically spliced by bolts (15).
As shown in fig. 5, the stiffening areas of the multi-cavity combined shell (3) are arranged correspondingly in a form of a horse-tooth twist, and the embedded screws (14) on two sides penetrate through the bolt holes reserved on the connecting plate (11) and are spliced annularly by bolts (15).
As shown in fig. 6, the bottom of the pure steel tower tube (1) is welded with a circumferential stiffening plate (16), a prestressed tendon anchoring plate (13), a flange plate (18) and a stiffening plate (12), the pure steel tower tube (1) is connected with the combined tower tube (2) through the flange plate (11) by using a bolt (15), and the prestressed tendon (4) penetrates through a prestressed tendon hole reserved on the prestressed tendon anchoring plate (13) and is anchored by using an anchorage device (5) on the upper side of the prestressed tendon hole.
The invention provides a hybrid wind power tower cylinder based on a segmented prestress multi-cavity combined shell, which fully exerts the stress characteristics of high bearing capacity and good stability of a combined structure, can realize segmented prestress application, section-by-section reduction of the number of segments from bottom to top, discontinuous vertical splicing seams, safe and reliable connection, short construction period, material consumption saving and wide engineering application prospect, and all components can be prefabricated in a factory and assembled on site.
The foregoing is merely a preferred embodiment of the present invention, but the present invention is not limited to the specific embodiments described above. Those skilled in the art should appreciate that they may readily use the disclosed conception and specific embodiments as a basis for modifying, supplementing or modifying other structures for providing out the same purposes of the present invention.
Although used more herein: 1-pure steel tower cylinder, 2-combined tower cylinder, 3-multi-cavity combined shell, 4-prestressed tendons, 5-anchorage device, 6-outer steel plate, 7-inner steel plate, 8-concrete, 9-inner steel plate, 10-end plate, 11-connecting plate, 12-stiffening plate, 13-prestressed tendon anchoring plate, 14-embedded screw, 15-bolt, 16-annular stiffening plate, 17-foundation, 18-flange plate and other terms, but the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention and they are to be interpreted as any additional limitation which is not in accordance with the spirit of the present invention.
Claims (5)
1. The utility model provides a mix wind power tower section of thick bamboo based on segmentation prestressing force multicavity combination casing, relates to wind power generation technical field, characterized by: the system comprises a pure steel tower cylinder (1), a combined tower cylinder (2), a multi-cavity combined shell (3), prestressed tendons (4), anchorage devices (5), outer steel plates (6), inner steel plates (7), concrete (8), inner steel plates (9), end plates (10), connecting plates (11), stiffening plates (12), prestressed tendon anchoring plates (13), embedded screws (14), bolts (15), annular stiffening plates (16), a foundation (17) and flange plates (18); the upper part of the system is a pure steel tower cylinder (1), and the lower part is a combined tower cylinder (2).
2. The hybrid wind tower based on a segmented prestressed multi-cavity composite casing according to claim 1, wherein: the combined tower drum (2) is assembled by the partitioned multi-cavity combined shell (3) along the annular direction to form a cylinder body and is assembled along the vertical section, and the number of the partitioned pieces of the multi-cavity combined shell (3) of each section of the combined tower drum (2) along the annular direction is gradually reduced from bottom to top.
3. The hybrid wind tower based on a segmented prestressed multi-cavity composite casing according to claim 1, wherein: the bottoms of the pure steel tower tube (1) and each section of combined tower tube (2) are connected with a foundation (17) through prestressed tendons (4), and the prestressed tendons (4) are uniformly distributed along the circumferential direction, so that prestress is applied in sections.
4. The hybrid wind tower based on a segmented prestressed multi-cavity composite casing according to claim 1, wherein: the multi-cavity combined shell (3) is formed by forming a multi-cavity box-shaped section by cold bending and welding steel plates or forming a box-shaped section by welding a plurality of sections of flat steel plates and then pouring concrete (8) in an inner cavity of the multi-cavity combined shell; the edge of the multi-cavity combined shell (3) is provided with a horse teeth twisting stiffening area and an embedded screw (14), and the adjacent multi-cavity combined shells are connected with a bolt hole reserved on a stiffening area connecting plate (11) through the embedded screw (14) by adopting a bolt (15); the lower part of the multi-cavity combined shell (3) is provided with a prestressed tendon anchoring plate (13), and the prestressed tendon (4) passes through a prestressed tendon hole reserved on the prestressed tendon anchoring plate (13) and is anchored by an anchorage device (5) on the upper side of the prestressed tendon hole.
5. The hybrid wind tower based on a segmented prestressed multi-cavity composite casing according to claim 1, wherein: the bottom of the pure steel tower tube (1) is welded with a circumferential stiffening plate (16), a prestressed tendon anchoring plate (13), a flange plate (18) and a stiffening plate (12), the pure steel tower tube (1) is connected with the combined tower tube (2) through the flange plate (11) by bolts (15), and the prestressed tendons (4) penetrate through prestressed tendon anchoring plates (13) and are anchored by anchors (5) on the upper sides of the prestressed tendon holes.
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| CN111794914A (en) * | 2020-06-17 | 2020-10-20 | 重庆大学 | A prefabricated hybrid wind power tower based on edge steel plates restraining concrete slabs |
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| CN112502908A (en) * | 2020-11-21 | 2021-03-16 | 重庆大学 | Connecting node suitable for offshore wind power tower cylinder structure and installation method |
| CN113027692A (en) * | 2021-03-10 | 2021-06-25 | 重庆大学 | Inner ring prestress assembled UHPC tower barrel section for wind power structure |
| CN113374646A (en) * | 2021-06-16 | 2021-09-10 | 重庆大学 | Light steel concrete prestressing force combination formula wind power tower section of thick bamboo and wind power tower thereof |
| CN113404643A (en) * | 2021-06-15 | 2021-09-17 | 中铁上海设计院集团有限公司 | Wind power hybrid tower prefabricated tower cylinder connected by section steel ring beams and construction method thereof |
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| CN114043620A (en) * | 2021-12-13 | 2022-02-15 | 中国电力工程顾问集团西北电力设计院有限公司 | Assembled cavity-spliced steel-concrete fan tower cylinder and manufacturing method thereof |
| CN114060225A (en) * | 2020-08-04 | 2022-02-18 | 库珀（天津）科技有限公司 | Steel-concrete combined tower and construction method thereof |
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| CN114593016A (en) * | 2022-03-09 | 2022-06-07 | 江苏金海风电塔筒科技有限公司 | wind tower |
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