CN108506169B - Method and structure for heightening prestress stay wire type tower of wind turbine generator - Google Patents
Method and structure for heightening prestress stay wire type tower of wind turbine generator Download PDFInfo
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- CN108506169B CN108506169B CN201810465006.4A CN201810465006A CN108506169B CN 108506169 B CN108506169 B CN 108506169B CN 201810465006 A CN201810465006 A CN 201810465006A CN 108506169 B CN108506169 B CN 108506169B
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 185
- 239000010959 steel Substances 0.000 claims abstract description 185
- 238000004873 anchoring Methods 0.000 claims description 25
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000010276 construction Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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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- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention provides a method and a structure for increasing the height of a hub of a wind turbine by increasing the height of a hub of the wind turbine in a mode of adding a new steel tower barrel, wherein the new steel tower barrel consists of one or more sections of steel tower barrels; the heightened wind turbine generator comprises a fan head, an original steel tower barrel, a newly-increased steel tower barrel and an original fan foundation from top to bottom. The wind turbine hub has the advantages of reasonable design, simple construction, firm connection and strong practicability, and can effectively increase the height of the wind turbine hub on the premise of using the original fan foundation and the tower.
Description
Technical Field
The invention belongs to the technical field of high tower barrels of wind turbine generators in low wind speed areas, and particularly relates to a method and a structure for heightening a conventional steel tower barrel at the upper part and a prestressed guyed tower at the lower part.
Background
At present, most of traditional wind turbines in China adopt steel conical towers, and most of the current wind turbines are low in hub height and low in power generation efficiency compared with Gao Lungu wind turbines. In order to effectively utilize wind energy resources in a low wind speed area, the land wind turbine generator system gradually develops to high power and high cavitation. At present, the prestressed concrete-steel cylinder mixed tower and the flexible tower can meet the requirements on the height and rigidity of the hub of the large-scale wind turbine generator, so that the wide attention is paid to the technical field of wind power of the high tower cylinder, and a new thought and direction are provided for the development of the future land wind power industry, but the current situation that the generating efficiency of the existing low-hub-height wind turbine generator in production operation is low still cannot be fundamentally changed.
Disclosure of Invention
The invention aims at solving the problems, and provides a prestress stay wire type tower heightening method for a wind turbine, which has the advantages of reasonable design, simple construction, firm connection and strong practicability, and can effectively increase the hub height of the wind turbine on the premise of using an original fan foundation and a tower barrel. For this purpose, the invention adopts the following technical scheme:
A method for heightening a prestressed guyed tower of a wind turbine is characterized in that the height of a hub of the wind turbine is increased in a mode of newly-increased steel tower cylinders, and the newly-increased steel tower cylinders consist of one or more sections of steel tower cylinders;
Setting a flange structure at the top end of the newly-added steel tower barrel to be matched with a flange structure at the bottom end of the original steel tower barrel, and setting a connecting structure at the bottom end of the newly-added steel tower barrel to be matched with a flange structure of the original fan foundation;
In the flange connection between the top end of the newly-increased steel tower cylinder and the bottom end of the original steel tower cylinder, the flange structure of the top end of the newly-increased steel tower cylinder is reinforced; when the newly-added steel tower cylinder consists of a plurality of sections of steel tower cylinders, adjacent steel tower cylinders are connected by a flange structure, and the flange structure at the upper end of the lower steel tower cylinder is reinforced;
The upper anchoring assembly of the prestress stay wire is arranged at the upper end of each newly added section of steel tower barrel, so that the prestress stay wire can be respectively applied to each newly added section of steel tower barrel;
Uniformly arranging a plurality of cast-in-place piles on the periphery of an original fan foundation, embedding foundation bolts at the tops of the cast-in-place piles, and fixing a lower anchoring assembly of a prestress stay wire by using the embedded foundation bolts;
Hoisting each newly added section of steel tower barrel section by section from bottom to top, connecting each section of steel tower barrel through a bolt assembly, and connecting a flange structure at the bottom end of the newly added steel tower barrel with a fan foundation; connecting steel strands at the upper anchoring assembly of the outer wall of each newly-added steel tower barrel and at the lower anchoring assembly of the top surface of the cast-in-place pile, and fixing the lower ends of the steel strands to the lower anchoring assembly in a lower tensioning mode so that each newly-added steel tower barrel is connected with the cast-in-place pile at the periphery of the original fan foundation through the prestressed steel strands; then hoisting the original steel tower from bottom to top section by section, connecting the flange structure at the bottom end of the original steel tower with the flange structure at the top end of the newly added steel tower through a bolt assembly, and connecting all sections of steel tower of the original steel tower through the bolt assembly;
The heightened wind turbine generator comprises a fan head, an original steel tower barrel, a newly-increased steel tower barrel and an original fan foundation from top to bottom.
Further, arranging pile positions before hoisting a newly-added steel tower cylinder, pouring a concrete cast-in-place pile, embedding anchor bolts, and installing a lower anchoring assembly of a steel strand on the top surface of the cast-in-place pile after the curing period; (2) The original fan head and tower are hoisted and placed in place.
The invention further aims to solve the problems, and provides the prestress stay wire type tower heightening structure of the wind turbine, which is reasonable in design, simple in construction, firm in connection and strong in practicability, and can effectively increase the hub height of the wind turbine on the premise of using an original fan foundation and a tower barrel. For this purpose, the invention adopts the following technical scheme:
A wind turbine generator system prestressing force guy type pylon increases structure which characterized in that: the prestress stay wire type tower heightening structure of the wind turbine generator comprises a newly-increased steel tower cylinder, prestress steel strands and a plurality of cast-in-place piles, wherein the newly-increased steel tower cylinder consists of one or more sections of steel tower cylinders; the heightened wind turbine generator comprises a wind turbine head, an original steel tower cylinder, a newly-added steel tower cylinder and an original wind turbine foundation from top to bottom in sequence, and a plurality of cast-in-place piles are uniformly arranged on the periphery of the original wind turbine foundation;
The flange structure at the top end of the newly-added steel tower cylinder is matched with the flange structure at the bottom end of the original steel tower cylinder, and the connecting structure at the bottom end of the newly-added steel tower cylinder is arranged as a flange structure matched with the original fan foundation;
the flange structure at the top end of the newly added steel tower cylinder is provided with a reinforcing structure; when the newly-added steel tower cylinder consists of a plurality of sections of steel tower cylinders, adjacent steel tower cylinders are connected by a flange structure, and the flange structure at the upper end of the lower steel tower cylinder is provided with a reinforcing structure;
the connection structure at the lowest end of the newly-added steel tower cylinder is arranged to be a flange structure matched with the original fan foundation;
an upper anchoring component of a prestress stay wire is arranged on the outer side of the upper end of each newly-added steel tower barrel;
the flange structure at the bottom end of the newly-increased steel tower barrel is connected with the flange structure at the top end of the newly-increased steel tower barrel through a bolt assembly, each section of newly-increased steel tower barrel is connected with the bolt assembly through the flange structure, and the flange structure at the bottom end of the newly-increased steel tower barrel is connected with the original fan foundation;
The lower anchoring assembly of the pre-stressed stay wire is fixed by the pre-embedded anchor bolts, the upper ends of the sections of steel tower cylinders of the newly-added steel tower cylinders are respectively connected with the cast-in-place pile through the pre-stressed steel strands, the upper ends of the steel strands are anchored to the upper anchoring assembly, and the lower ends of the steel strands are fixed to the lower anchoring assembly of the steel strand at the top of the cast-in-place pile after being tensioned and pre-tensioned.
Further, the reinforcing structure comprises a circumferential stiffening plate and a longitudinal stiffening plate welded on the inner wall of the upper end of the steel tower.
Further, the steel strands are uniformly distributed along the circumferential direction of the tower, and the arrangement of the cast-in-place pile corresponds to the prestress steel strands.
Further, the upper end and the lower end of each section of steel tower cylinder of the newly-added steel tower cylinder are processed into L-shaped flanges, 2 layers of annular stiffening plates and longitudinal stiffening plates are welded at the upper end of each section of steel tower cylinder, and bolt holes are preset in the middle of the flange plates of the L-shaped flanges and the annular stiffening plates; and the longitudinal stiffening plates and the annular stiffening plates are welded with the inner wall of the tower.
The beneficial effects of the invention are as follows:
(1) The method and the structure for increasing the height of the hub of the wind turbine generator set by the prestress guyed tower have the advantages of less engineering quantity, reasonable structural design, simple construction, firm connection and strong practicability, can increase the hub height of the wind turbine generator set by tens of meters on the premise of using the original fan foundation and the tower barrel, can increase the hub height of the wind turbine generator set by less than 100 meters in the past by more than 100 meters, and can better utilize wind energy resources in a low wind speed area.
(2) After the newly-increased steel tower cylinder is pretensioned through the peripheral prestressed steel strands and the filling pile, the lower structure is in a prepressing state integrally on the basis of connecting and positioning of the flange and the bolt assembly, and the tensile strength and the stability of the tower cylinder and the anti-overturning capacity of the fan foundation in the fan operation process can be ensured under the condition of pulling up the height of the hub of the wind turbine.
(3) The current situation that the generating efficiency of the existing low-hub-height wind turbine generator is low in the production operation can be fundamentally changed.
Drawings
FIG. 1 is an elevational view of the overall structure of a wind turbine generator set pre-stressed guyed tower in accordance with an embodiment of the present invention.
FIG. 2 is a cross-sectional view, A-A, of FIG. 1 showing a top view of a wind turbine generator set pre-stressed wire tower boost structure in accordance with an embodiment of the present invention.
FIG. 3 is a schematic view of a portion of a newly added tower section connection and a steel strand lug in an embodiment of the present invention.
FIG. 4 is a view in the direction B-B of FIG. 3, showing a partial schematic view of the flanges and stiffening plates at the junction of the newly added tower sections in accordance with an embodiment of the present invention.
Fig. 5 is a top view of a steel strand lug in an embodiment of the invention.
Fig. 6 is a partial schematic view of a cast-in-place pile top steel strand anchor assembly in accordance with an embodiment of the present invention.
Fig. 7 is a C-C cross-sectional view of fig. 6.
Fig. 8 is a D-D cross-sectional view of fig. 6.
Detailed Description
In this embodiment, a tower with an original hub height of 72.5m is used, and 2 sections of steel towers with heights of 20m are additionally arranged at the lower part to raise the hub height to 112.5m, so that the invention is further described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 8, the wind turbine generator system prestressed stay wire type tower heightening structure in the embodiment comprises 2 sections of newly-added steel tower cylinders 3, prestressed steel strands 4 and cast-in-place piles 5. The heightened wind turbine generator system sequentially comprises a fan head 1, an original steel tower section 2, a prestress stay wire type tower heightening structure and an original fan foundation 6 from top to bottom.
The number of the sections of the newly-added steel tower barrel and the length of each section can be determined according to actual needs and comprehensively considering the integral stress characteristics of the tower barrel. The steel strands are uniformly distributed along the circumferential direction of the tower barrel, and the number and the pretension of the steel strands are determined according to the load of the upper fan; the arrangement of the filling pile corresponds to the prestress steel strands, and the filling pile is uniformly and annularly arranged at a certain distance from the outer side of the fan foundation, so that the filling pile foundation is not excessively far away from the fan foundation in order to avoid the influence of a stay wire on the surrounding environment; the diameter and length of the cast-in-place pile are determined according to the tension of the steel strand and the geological detail survey data at the selected machine position.
The newly-increased steel tower barrels 3 of each section are connected with the cast-in-place pile 5 through prestressed steel strands 4, and as a preferred scheme, in the embodiment, each newly-increased steel tower barrel is tensioned through 6 steel strands 4 which are uniformly distributed in the circumferential direction, the upper ends of the steel strands 4 are anchored to the pull lugs 7 on the outer side of the top of the newly-increased steel tower barrels 3, and the lower ends of the steel strands are fixed to the lower end anchoring components of the steel strands on the top of the cast-in-place pile 5.
As shown in fig. 3, the steel tower cylinders are connected through a bolt assembly 8 and a flange structure. The upper end and the lower end of the newly-increased steel tower cylinder 3 are processed into L-shaped flanges 9, 2 layers of annular stiffening plates 11 and longitudinal stiffening plates 10 are welded at the upper end of the newly-increased steel tower cylinder, bolt holes are preset in the middle of the flange plates 9 and the annular stiffening plates 11, and the number and the positioning of the bolt holes of the upper end flange structure of the uppermost newly-increased steel tower cylinder 3 are consistent with those of original bolt holes of the flange at the bottom end of the original steel tower cylinder. The longitudinal stiffening plates 10 and the circumferential stiffening plates 11 are welded with the inner wall of the tower. The corner points where the longitudinal stiffening plates 10 are connected with the inner wall of the steel cylinder 3 are provided with arc-shaped holes 12 so as to avoid stress concentration, smooth transition of local stress and optimization of stress transmission paths. The bottom of the newly added steel tower cylinder 3 is connected with the original fan foundation 6 through a flange structure and a bolt assembly.
The annular stiffening plate 11 and the longitudinal stiffening plate 10 participate in the flange structure, so that the thickness of the flange structure can be increased to achieve the purpose of increasing the length of a bolt, the problem of fatigue damage caused by too short length of the bolt is avoided, and the strength of the joint of the flange connection structure and the pull lugs of the steel strands can be greatly enhanced.
The connection between the sections of the steel tower cylinders 2 of the original steel tower cylinder is connected according to the original connection mode. The sections of the newly-added steel tower 3 are connected through flange structures and bolt assemblies, and the upper flange structure of the steel tower below is also provided with the annular stiffening plate 11 and the longitudinal stiffening plate 10 reinforcing structures.
The anchoring pull lugs 7 at the upper ends of the steel strands comprise 4 upper rib plates 13, 4 lower rib plates 16 and a pull wire plate 15. The rib plates 13 and 16 and the stay wire plate 15 are welded with the outer wall of the steel tower 3, and the gradient of the stay wire plate 15 is determined according to the stretching angle of the steel stranded wires 4 so as to ensure that the axes of the steel stranded wires are perpendicular to the plane of the stay wire plate. The middle of the stay wire plate 15 is provided with a steel strand perforation 17, the steel strand 4 is installed through the perforation 17, and the upper end is anchored on the upper surface of the stay wire plate 15 through the lock head 14.
In this embodiment, 6 bored concrete piles 5 with a diameter of 1.2m are circumferentially and uniformly arranged, the pile length is calculated and determined to be 25m according to geological detail survey data and tensile bearing capacity of a selected machine position, and the top of each bored concrete pile 5 is connected with an anchoring assembly at the lower end of a steel strand through 8 pre-buried anchor bolts 21. The lower end anchoring assembly comprises H-shaped steel 20, stiffening plates 25, angle plates 18 and locking heads 19, so that the installation is convenient, the firmness of a foundation is ensured, and pre-tensioning operation space can be provided. The 8 rectangular stiffening plates 25 are vertically arranged between the upper and lower flanges 24 and 26 of the H-shaped steel and are welded with the web plates and flanges of the H-shaped steel. 8 anchor bolt holes 22 are formed in the upper flange plate and the lower flange plate of the H-shaped steel, so that 8 anchor bolts can conveniently pass through the H-shaped steel; and 2 steel strand perforations 23 are additionally arranged on an upper flange plate 24 of the H-shaped steel. The angle plate 18 is used for adjusting the axis of the steel strand to be perpendicular to the lower anchoring end face, and the lower end of the steel strand 4 is anchored to the bottom face of the angle plate 18 by adopting a lower tensioning mode through the lock 19.
In the embodiment, all welding seams are required to be polished to eliminate residual stress; all the steel strands need to be subjected to corrosion-resistant treatment.
The above embodiment is only one preferred technical solution of the present invention, and it should be understood by those skilled in the art that modifications and substitutions can be made to the technical solution or parameters in the embodiment without departing from the principle and essence of the present invention, and all the modifications and substitutions are covered in the protection scope of the present invention.
Claims (4)
1. A method for heightening a prestressed guyed tower of a wind turbine is characterized in that the height of a hub of the wind turbine is increased in a mode of newly-increased steel tower cylinders, and the newly-increased steel tower cylinders consist of a plurality of sections of steel tower cylinders;
Setting a flange structure at the top end of the newly-added steel tower barrel to be matched with a flange structure at the bottom end of the original steel tower barrel, and setting a connecting structure at the bottom end of the newly-added steel tower barrel to be matched with a flange structure of the original fan foundation;
In the flange connection between the top end of the newly-increased steel tower cylinder and the bottom end of the original steel tower cylinder, the flange structure of the top end of the newly-increased steel tower cylinder is reinforced; adjacent steel tower cylinders are connected by a flange structure, and the flange structure at the upper end of the lower steel tower cylinder is reinforced;
The upper anchoring assembly of the prestress stay wire is arranged at the upper end of each newly added section of steel tower barrel, so that the prestress stay wire can be respectively applied to each newly added section of steel tower barrel;
Uniformly arranging a plurality of cast-in-place piles on the periphery of an original fan foundation, embedding foundation bolts at the tops of the cast-in-place piles, and fixing a lower anchoring assembly of a prestress stay wire by using the embedded foundation bolts;
Hoisting each newly added section of steel tower barrel section by section from bottom to top, connecting each section of steel tower barrel through a bolt assembly, and connecting a flange structure at the bottom end of the newly added steel tower barrel with a fan foundation; connecting steel strands at the upper anchoring assembly of the outer wall of each newly-added steel tower barrel and at the lower anchoring assembly of the top surface of the cast-in-place pile, and fixing the lower ends of the steel strands to the lower anchoring assembly in a lower tensioning mode so that each newly-added steel tower barrel is connected with the cast-in-place pile at the periphery of the original fan foundation through the prestressed steel strands; then hoisting the original steel tower from bottom to top section by section, connecting the flange structure at the bottom end of the original steel tower with the flange structure at the top end of the newly added steel tower through a bolt assembly, and connecting all sections of steel tower of the original steel tower through the bolt assembly;
The heightened wind turbine generator comprises a fan head, an original steel tower barrel, a newly-increased steel tower barrel and an original fan foundation from top to bottom.
2. The method for increasing the height of the prestressed guyed tower of the wind turbine generator set according to claim 1, wherein the method comprises the following steps: arranging pile positions before hoisting newly-added steel tower cylinders, pouring a concrete cast-in-place pile, embedding anchor bolts, and installing a lower anchoring assembly of a steel strand on the top surface of the cast-in-place pile after the curing period; (2) The original fan head and tower are hoisted and placed in place.
3. A wind turbine generator system prestressing force guy type pylon increases structure which characterized in that: the prestress stay wire type tower heightening structure of the wind turbine generator comprises a newly-increased steel tower cylinder, prestress steel strands and a plurality of cast-in-place piles, wherein the newly-increased steel tower cylinder consists of a plurality of sections of steel tower cylinders; the heightened wind turbine generator comprises a wind turbine head, an original steel tower cylinder, a newly-added steel tower cylinder and an original wind turbine foundation from top to bottom in sequence, and a plurality of cast-in-place piles are uniformly arranged on the periphery of the original wind turbine foundation;
The flange structure at the top end of the newly-added steel tower cylinder is matched with the flange structure at the bottom end of the original steel tower cylinder, and the connecting structure at the bottom end of the newly-added steel tower cylinder is arranged as a flange structure matched with the original fan foundation;
the flange structure at the top end of the newly added steel tower cylinder is provided with a reinforcing structure; when the newly-added steel tower cylinder consists of a plurality of sections of steel tower cylinders, adjacent steel tower cylinders are connected by a flange structure, and the flange structure at the upper end of the lower steel tower cylinder is provided with a reinforcing structure;
the connection structure at the lowest end of the newly-added steel tower cylinder is arranged to be a flange structure matched with the original fan foundation;
an upper anchoring component of a prestress stay wire is arranged on the outer side of the upper end of each newly-added steel tower barrel;
the flange structure at the bottom end of the newly-increased steel tower barrel is connected with the flange structure at the top end of the newly-increased steel tower barrel through a bolt assembly, each section of newly-increased steel tower barrel is connected with the bolt assembly through the flange structure, and the flange structure at the bottom end of the newly-increased steel tower barrel is connected with the original fan foundation;
The lower anchoring assembly of the pre-stressed stay wire is fixed by the pre-embedded anchor bolts, the upper ends of the sections of steel tower cylinders of the newly-added steel tower cylinders are respectively connected with the cast-in-place pile through the pre-stressed steel strands, the upper ends of the steel strands are anchored to the upper anchoring assembly, and the lower ends of the steel strands are fixed to the lower anchoring assembly of the steel strand at the top of the cast-in-place pile after tensioning and pre-tightening;
The reinforcing structure comprises a circumferential stiffening plate and a longitudinal stiffening plate which are welded at the inner wall of the upper end of the steel tower cylinder; the upper end and the lower end of each section of steel tower cylinder of the newly-added steel tower cylinder are processed into L-shaped flanges, 2 layers of annular stiffening plates and longitudinal stiffening plates are welded at the upper end of each section of steel tower cylinder, and bolt holes are preset in the middle of the flange plates of the L-shaped flanges and the annular stiffening plates; and the longitudinal stiffening plates and the annular stiffening plates are welded with the inner wall of the tower.
4. The prestressed guyed tower heightening structure of the wind turbine generator set according to claim 3, wherein: the steel strands are uniformly distributed along the circumferential direction of the tower, and the arrangement of the cast-in-place pile corresponds to the prestress steel strands.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810465006.4A CN108506169B (en) | 2018-05-16 | 2018-05-16 | Method and structure for heightening prestress stay wire type tower of wind turbine generator |
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| CN201810465006.4A CN108506169B (en) | 2018-05-16 | 2018-05-16 | Method and structure for heightening prestress stay wire type tower of wind turbine generator |
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| CN108506169B true CN108506169B (en) | 2024-06-11 |
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| CN112576450A (en) * | 2019-09-27 | 2021-03-30 | 北京金风科创风电设备有限公司 | Stay cable type tower, wind generating set and connecting device |
| CN111608864A (en) * | 2020-06-28 | 2020-09-01 | 内蒙古金海新能源科技股份有限公司 | Guyed steel cylinder tower of wind generating set and steel cylinder replacing method |
| EP4124750A1 (en) * | 2021-07-27 | 2023-02-01 | Siemens Gamesa Renewable Energy Innovation & Technology S.L. | Stay cable connection assembly |
| CN114541439B (en) * | 2022-03-22 | 2023-09-26 | 中交路桥建设有限公司 | Construction method of double-wall steel cofferdam structure without bottom sealing |
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| CN108506169A (en) | 2018-09-07 |
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