CN112112767A - Combined structure switching structure for wind turbine generator system steel-concrete tower cylinder - Google Patents
Combined structure switching structure for wind turbine generator system steel-concrete tower cylinder Download PDFInfo
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- CN112112767A CN112112767A CN202010966024.8A CN202010966024A CN112112767A CN 112112767 A CN112112767 A CN 112112767A CN 202010966024 A CN202010966024 A CN 202010966024A CN 112112767 A CN112112767 A CN 112112767A
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- 239000004567 concrete Substances 0.000 title claims abstract description 84
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 152
- 239000010959 steel Substances 0.000 claims abstract description 152
- 238000005192 partition Methods 0.000 claims abstract description 23
- 239000002131 composite material Substances 0.000 claims abstract description 11
- 230000006835 compression Effects 0.000 claims abstract description 11
- 238000007906 compression Methods 0.000 claims abstract description 11
- 238000005242 forging Methods 0.000 claims abstract description 8
- 238000010248 power generation Methods 0.000 claims abstract description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract 6
- 210000002435 tendon Anatomy 0.000 claims description 11
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 8
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 8
- 241001330002 Bambuseae Species 0.000 claims description 8
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 8
- 239000011425 bamboo Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 5
- 239000011150 reinforced concrete Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a composite structure switching structure for a wind turbine generator system steel-concrete tower, which relates to the technical field of wind power generation and is characterized in that: the system comprises an outer circular truncated cone-shaped steel pipe, an inner circular truncated cone-shaped steel pipe, a vertical inner partition plate, concrete, a stud, an annular steel bar compression steel bar, an annular tension steel bar, a radial steel bar, a forging flange, a prestressed bar, a steel tower cylinder, a concrete tower cylinder and a reinforced concrete cushion layer. The upper end of the outer side circular truncated cone-shaped steel pipe is welded and forged with a flange and is connected with the upper steel tower barrel through bolts, studs are uniformly arranged on the inner surface of the outer side circular truncated cone-shaped steel pipe and the outer surface of the inner side circular truncated cone-shaped steel pipe, and vertical inner baffles are uniformly arranged along the circumferential direction. And circumferential reinforcing steel bars and radial reinforcing steel bars are arranged on the upper and lower parts of the cross section between the outer side circular truncated cone-shaped steel pipe and the inner side circular truncated cone-shaped steel pipe, and concrete is poured. Prestressed ducts are uniformly distributed in the concrete along the circumferential direction, and after the adapter ring is installed and aligned, prestressed tensioning is carried out from the bottom of the foundation of the lower concrete tower tube to the upper surface of the concrete in the adapter ring.
Description
Technical Field
The invention relates to the technical field of wind power generation.
Background
The development of wind power energy is one of the important ways of the national energy strategy transformation. In recent years, wind power resources are rapidly developed and utilized. In order to obtain higher wind speed and improve the generated energy, the wind turbine with high power and high tower becomes a development trend. In order to save material cost and improve the stress performance of the tower drum, a mixed tower drum with a steel tower drum at the upper part and a concrete tower drum at the lower part is produced.
The hybrid tower cylinder has the advantages of good stability, high bearing capacity, good fatigue resistance and the like, but the switching device between the concrete tower cylinder and the steel tower cylinder is very important for the stress performance of the hybrid tower cylinder. The traditional reinforced concrete adapter ring has the advantages of large quantity of steel bars, complex arrangement, large processing and manufacturing difficulty, large volume of a reinforced concrete structure and difficult hoisting. Compared with the traditional concrete adapter ring, the total material cost of the novel steel-concrete combined adapter ring is reduced by 2.25 ten thousand (12.5%), the total weight is reduced by 20.8 tons (27.9%), and meanwhile, the novel steel-concrete combined adapter ring has the advantages of small steel bar consumption, manpower saving, high processing speed and no template; two steel backing plates and a long screw rod in the traditional concrete adapter ring are omitted; and in-site installation, only the adapter ring and the top of the mixing tower need to be grouted and leveled once, the installation speed is high, and the popularization and application advantages are obvious.
Disclosure of Invention
The invention provides a composite structure switching structure for a wind turbine generator steel-concrete tower, which consists of an outer side circular truncated cone-shaped steel pipe, an inner side circular truncated cone-shaped steel pipe, a vertical inner partition plate, concrete, a base plate, a corrugated pipe, studs, annular compression steel bars, annular tension steel bars, radial steel bars, forged flanges, prestressed ribs, a steel pipe concrete cushion layer, an anchorage device and bolts.
The upper end of the outer circular truncated cone-shaped steel pipe is welded with a forging flange, and the forging flange is connected with the upper steel cylinder through a bolt. The inner side surface of the outer round platform-shaped steel pipe and the outer side surface of the inner round platform-shaped steel pipe are provided with the studs, vertical inner partition plates are uniformly arranged between the outer round platform-shaped steel pipe and the inner round platform-shaped steel pipe in the circumferential direction, rectangular holes are reserved in the upper side and the lower side of each inner partition plate so that circumferential compression steel bars and circumferential tension steel bars can penetrate through the inner round platform-shaped steel pipe, and the outer round platform-shaped steel pipe is 500-800 mm higher than the inner round platform-shaped steel pipe and is convenient. A circular hole is reserved in the middle of the vertical inner partition plate, concrete pouring is facilitated, and the diameter of the circular hole is 1/3-1/2 of the width of the partition plate. Concrete is poured between the outer side circular truncated cone-shaped steel pipe and the inner side circular truncated cone-shaped steel pipe, and a corrugated pipe is adopted to reserve a prestressed duct. The inner side circular truncated cone-shaped steel pipe is stiffened by adopting a short steel pipe corresponding to the penetrating position of the prestressed tendon, the wall thickness of the short steel pipe is 1-2 mm, the diameter of the short steel pipe is the same as that of the corrugated pipe, and the length of the short steel pipe is 5-6 times of the thickness of the corrugated pipe.
A steel pipe concrete cushion layer is arranged between the lower portion of the conversion structure and the top surface of the concrete tower barrel, and can be prefabricated in a factory, and conversion from a circular section to any section is achieved.
The structure overcomes the defects of large quantity of traditional adapter ring steel bars, complex arrangement, large processing and manufacturing difficulty, large volume of a reinforced concrete structure, difficult hoisting and the like, can realize factory prefabrication and field assembly type full-assembly construction, fully exerts the compression resistance of concrete and the constraint performance of a steel pipe on the concrete, has superior mechanical property, adopts combined structural performance, reduces the consumption and the structural volume of materials, is convenient to transport, has short construction period and high comprehensive benefit, and has wide engineering application prospect.
The technical scheme of the invention is as follows:
the utility model provides a integrated configuration switching structure for wind turbine generator system steel-concrete tower section of thick bamboo, this structure includes outside round platform shape steel pipe, inboard round platform shape steel pipe, vertical inner baffle, concrete, backing plate, bellows, peg, hoop pressurized reinforcing bar, hoop tensile reinforcing bar, radial reinforcing bar, forges flange, prestressing tendons, steel pipe concrete bed course, short steel pipe, ground tackle and bolt.
The structure is mainly used for connecting a steel tower drum and a concrete tower drum. The upper end of the outer circular truncated cone-shaped steel pipe is welded with a forged flange and is connected with the upper steel tower barrel through bolts. The inner surface of the outer side circular truncated cone-shaped steel pipe and the outer surface of the inner side circular truncated cone-shaped steel pipe are provided with the studs, the studs are arranged in a quincunx mode, the structure mainly bears vertical compressive stress, the transverse stress is relatively small, and therefore the transverse distance is 1.5-2 times of the vertical distance.
Vertical inner baffles are uniformly arranged between the outer side circular truncated cone-shaped steel pipe and the inner side circular truncated cone-shaped steel pipe along the circumferential direction, rectangular holes are reserved on the upper side and the lower side of each inner baffle, so that the circumferential compression steel bars and the circumferential tension steel bars can penetrate through the rectangular holes, and concrete is filled between the outer side circular truncated cone-shaped steel pipe and the inner side circular truncated cone-shaped steel pipe. The outer side circular truncated cone-shaped steel pipe is 500-800 mm higher than the inner side circular truncated cone-shaped steel pipe, and a space is reserved for upper flange connection. The height of the concrete pouring height and the height of the vertical inner partition plate are consistent with the height of the inner side circular truncated cone-shaped steel pipe.
The switching structure is through steel pipe concrete bed course and concrete tower section of thick bamboo installation counterpoint, by concrete tower section of thick bamboo basis to the inside concrete top stretch-draw prestressing tendons of structure, need place the backing plate at the concrete top surface and place local pressurized destruction during stretch-draw prestressing tendons. And adopting a short steel pipe for stiffening when the prestress passes through the inner circular truncated cone-shaped steel pipe. The internal prestressing tendons makes a concrete tower section of thick bamboo and switching structure all be in full cross-section pressurized state, has increased a concrete tower section of thick bamboo's wholeness ability, places the prestressing tendons simultaneously and can effectively slow down the corrosion of prestressing tendons in inside.
Compared with the prior art, the invention has the following beneficial effects:
(1) adopt bolt and prestressing tendons to be connected through the switching structure between a steel tower section of thick bamboo and the concrete tower section of thick bamboo, compare in traditional concrete adapter ring, saved steel backing plate and long screw, and novel switching structure reinforcing bar quantity is little, uses manpower sparingly, process velocity is fast, saves the template.
(2) Set up the dowel and vertical interior baffle between outside round platform shape steel pipe in this structure and the inboard round platform shape steel pipe, the combined action between full play steel sheet and the concrete, inside concrete mainly bears compressive stress, and prestressing force and steel sheet produce the restraint stress to the concrete, have bear the weight of the high, good, the save material of stability, advantage such as cost are low of bearing weight.
(3) The structure adopts the construction modes of factory prefabrication and field assembly, the field installation only needs to perform one-time grouting and leveling on the top of the adapter ring and the top of the concrete tower, the installation speed is high, and the steel-concrete combined structure form is adopted, so that the structure weight is reduced, and the transportation and the hoisting are convenient.
(4) The switching structure is aligned with the lower concrete tower barrel through the steel pipe concrete cushion layer, and conversion of the circular section to any section is achieved.
Drawings
FIG. 1 is an overall schematic view of the present invention;
FIG. 2 is a top view of the composite structure adapter structure of the present invention;
FIG. 3 is a bottom view of the composite structure adapter structure of the present invention;
FIG. 4 is a cross-sectional view of the composite structure adapter 1-1 of the present invention;
FIG. 5 is a cross-sectional view of the composite structure transition structure 2-2 of the present invention;
FIG. 6 is a schematic view of the arrangement of the studs in the composite structure transition configuration of the present invention;
FIG. 7 is a schematic view of a concrete filled steel tube cushion layer in the composite structure transition structure of the present invention;
FIG. 8 is a schematic view of the connection of a steel tower and a concrete tower of the composite structural conversion structure of the present invention.
In the figure: the method comprises the following steps of 1-outer circular truncated cone-shaped steel pipe, 2-inner circular truncated cone-shaped steel pipe, 3-vertical inner partition plate, 4-concrete, 5-base plate, 6-corrugated pipe, 7-dowel pin, 8-annular compression steel bar, 9-annular tension steel bar, 10-forging flange, 11-prestress steel bar, 12-anchorage device, 13-steel tower cylinder, 14-concrete tower cylinder, 15-bolt, 16-rectangular preformed hole, 17-field grouting leveling, 18-short steel pipe, 19-vertical inner partition plate opening, 20-radial steel bar, 21-spiral steel bar, 22-steel pipe concrete cushion layer, 23-outer steel pipe, 24-inner steel pipe and 25-internal stiffening rib.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in figure 1, the combined structure connecting structure for the wind turbine steel-concrete tower is used for connecting a steel tower barrel (13) and a concrete tower barrel (14), and a forging flange (10) at the upper end of the connecting structure is connected with the steel tower barrel (13) through bolts (15).
As shown in figure 2, a forged flange (10) is welded at the upper end of the outer circular truncated cone-shaped steel pipe (1), vertical inner partition plates (3) are uniformly arranged between the outer circular truncated cone-shaped steel pipe (1) and the inner circular truncated cone-shaped steel pipe (2) along the circumferential direction, the middle of each vertical inner partition plate is provided with a circular hole (19) in order to guarantee the concrete pouring quality, and the diameter of each vertical inner partition plate hole (19) is 1/3-1/2 of the width of each vertical inner partition plate (3).
As shown in fig. 3, concrete (4) is poured between the outer side circular truncated cone-shaped steel tube (1) and the inner side circular truncated cone-shaped steel tube (2), a corrugated tube (6) is adopted in the concrete (4) to reserve a prestressed rib (11) hole channel, and the prestressed force penetrates through the inner side circular truncated cone-shaped steel tube (2) and is stiffened by adopting a short steel tube (18).
As shown in fig. 4, rectangular preformed holes (16) are reserved at the upper end and the lower end of the vertical inner partition plate (4) so that the circumferential compression steel bars (8) and the circumferential tension steel bars (9) can pass through the holes, radial steel bars (20) are arranged at the positions of the circumferential compression steel bars (8) to form a steel bar mesh to bear local compression stress of prestress, and the force is uniformly transmitted to the lower concrete (4) through the spiral steel bars (21) at the lower part.
As shown in figure 5, studs are arranged on the inner surface of the outer circular truncated cone-shaped steel pipe (1) and the outer surface of the inner circular truncated cone-shaped steel pipe (2).
As shown in figure 6, the pegs arranged on the inner surface of the outer circular truncated cone-shaped steel pipe (1) and the outer surface of the inner circular truncated cone-shaped steel pipe (2) are arranged in a quincunx manner, and the transverse distance is 1.5-2 times of the vertical distance. The pouring height of the concrete (4) and the height of the vertical inner partition plate (3) are consistent with the height of the inner side circular truncated cone-shaped steel pipe (2), and the outer side circular truncated cone-shaped steel pipe (1) is 500-800 mm higher than the inner side circular truncated cone-shaped steel pipe (2).
As shown in fig. 7, the diameter of the inner steel tube (24) of the concrete-filled steel tube cushion layer (22) is correspondingly consistent with the diameter of the lower part of the inner truncated cone-shaped steel tube (2), the positions of the inner stiffening ribs (25) and the vertical inner partition plate (3) are correspondingly consistent, and concrete (4) is filled between the inner steel tube and the outer steel tube.
As shown in fig. 8, the adapter ring and the concrete tower tube are leveled by grouting in situ (17), and after the adapter structure is installed, a prestress is applied from the foundation of the concrete tower tube (14) to the top surface of the concrete (4) in the adapter structure, so that the concrete tower tube (14) and the adapter structure are integrated.
Claims (3)
1. The utility model provides a integrated configuration switching structure for wind turbine generator system steel-concrete tower section of thick bamboo, relates to wind power generation technical field, characterized by: the system comprises an outer-side truncated cone-shaped steel pipe (1), an inner-side truncated cone-shaped steel pipe (2), a vertical inner partition plate (3), concrete (4), a base plate (5), a corrugated pipe (6), a stud (7), a circumferential steel bar compression steel bar (8), a circumferential tension steel bar (9), a forging flange (10), a prestressed rib (11), an anchorage device (12), a steel tower cylinder (13), a concrete tower cylinder (14), a bolt (15), a short steel pipe (18), a radial steel bar (20), a spiral steel bar (21) and a steel pipe concrete cushion layer (22); the upper part of the switching structure is connected with a steel tower barrel (13), and the lower part of the switching structure is connected with a concrete tower barrel (14).
2. The composite structure transfer construction for the wind turbine steel-concrete tower according to claim 1, characterized in that: the upper end of the outer circular truncated cone-shaped steel pipe (1) is welded with a forging flange (10), and the upper end of the forging flange (10) is connected with an upper steel tower tube (13) through a bolt (15); the inner surface of the outer side circular truncated cone-shaped steel pipe (1) and the outer surface of the inner side circular truncated cone-shaped steel pipe (2) are uniformly provided with studs (7), 6-12 vertical inner partition plates (3) are uniformly arranged along the circumferential direction, in order to ensure the concrete pouring quality, the middle of each vertical inner partition plate (3) is provided with a hole, and the diameter of each hole is 1/3-1/2 of the width of each vertical inner partition plate (3); annular steel bar compression steel bars (8) and annular tension steel bars (9) are respectively arranged at the upper part and the lower part of the section between the outer side circular truncated cone-shaped steel pipe (1) and the inner side circular truncated cone-shaped steel pipe (2); a rectangular preformed hole (16) is reserved in the position, corresponding to the steel bar, of the vertical inner partition plate (3); concrete (4) is poured between the outer side circular truncated cone-shaped steel pipe (1) and the inner side circular truncated cone-shaped steel pipe (2), and corrugated pipes (6) are uniformly arranged in the concrete along the circumferential direction and used for reserving a prestressed tendon (11) hole channel; the diameter of an inner steel pipe (24) of the steel pipe concrete cushion layer (22) is consistent with the diameter of the lower end of an inner side circular truncated cone-shaped steel pipe (2) in the transfer structure, the positions of an internal stiffening rib (25) and a vertical inner partition plate (3) in the transfer structure are correspondingly consistent, the section of an outer steel pipe (23) can be triangular, quadrangular, hexagonal, chamfered triangular or chamfered quadrangular according to the structural form of a lower concrete tower tube (14), and the height of the steel pipe concrete cushion layer (22) is generally 1.5-2 times of the side length of the outer steel pipe (23).
3. The composite structure transfer construction for the wind turbine steel-concrete tower according to claim 2, characterized in that: a steel pipe concrete cushion layer (22) is arranged between the bottom surface of the switching structure and the lower concrete tower tube (14), conversion from a circular section to an arbitrary section is realized, on-site grouting leveling (17) is adopted, after alignment is carried out, integral prestressed tendons (11) are tensioned from the bottom of the foundation of the lower concrete tower tube (14) to the upper surface of concrete (4) in the switching ring, a base plate (5) is placed below an anchorage device (12) during tensioning, radial reinforcing steel bars (20) are arranged on the upper side of the concrete, the radial reinforcing steel bars (20) and annular stressed reinforcing steel bars (8) jointly bear local compressive stress of the prestressed tendons (11), and the force is uniformly transmitted to the lower concrete through lower spiral reinforcing steel bars (21); the pegs (7) are arranged in a quincunx manner, and the transverse spacing is 1.5-2 times of the vertical spacing; the outer side circular truncated cone-shaped steel tube (1) is 500-800 mm higher than the inner side circular truncated cone-shaped steel tube (2); the pouring height of the concrete (4) and the height of the vertical inner partition plate (3) are consistent with the height of the inner side circular truncated cone-shaped steel pipe (2); the anchor hole of the prestressed rib (11) of the inner side circular truncated cone-shaped steel pipe (2) is reinforced by a short steel pipe, the diameter of the steel pipe is the same as that of the corrugated pipe (6), the thickness of the steel pipe is 1-2 mm, and the length of the steel pipe is 5-6 times of the thickness of the corrugated pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010966024.8A CN112112767A (en) | 2020-09-15 | 2020-09-15 | Combined structure switching structure for wind turbine generator system steel-concrete tower cylinder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010966024.8A CN112112767A (en) | 2020-09-15 | 2020-09-15 | Combined structure switching structure for wind turbine generator system steel-concrete tower cylinder |
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| CN202010966024.8A Pending CN112112767A (en) | 2020-09-15 | 2020-09-15 | Combined structure switching structure for wind turbine generator system steel-concrete tower cylinder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719419A (en) * | 2021-10-09 | 2021-11-30 | 重庆大学 | Steel-concrete composite structure switching section of wind generating set |
| CN114753402A (en) * | 2022-04-06 | 2022-07-15 | 中国船舶重工集团海装风电股份有限公司 | Steel-concrete composite structure switching section for wind power tower |
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