CN112196746A - High-neck tensioning anti-loosening flange connecting node and mounting method - Google Patents
High-neck tensioning anti-loosening flange connecting node and mounting method Download PDFInfo
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- CN112196746A CN112196746A CN202011229572.9A CN202011229572A CN112196746A CN 112196746 A CN112196746 A CN 112196746A CN 202011229572 A CN202011229572 A CN 202011229572A CN 112196746 A CN112196746 A CN 112196746A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 51
- 239000010959 steel Substances 0.000 claims abstract description 51
- 238000009434 installation Methods 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims description 45
- 230000035515 penetration Effects 0.000 claims description 8
- 230000011218 segmentation Effects 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
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- 241001330002 Bambuseae Species 0.000 description 1
- 229920000426 Microplastic Polymers 0.000 description 1
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- 238000004458 analytical method Methods 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000003825 pressing Methods 0.000 description 1
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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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- 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
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention relates to a high-neck tensioning anti-loosening flange connecting node and an installation method, the connecting node comprises an upper segmented steel pipe component (1), an upper flange (2), a lower flange (5) and a lower segmented steel pipe component (8) which are sequentially connected from top to bottom, the upper flange (2) and the lower flange (5) are connected through high-strength bolts (6), a balance stiffening plate (3) is arranged between a flange plate of the upper flange (2) and a flange plate of the lower flange (5), and the balance stiffening plate (3) is fixedly connected with the upper segmented steel pipe component (1) and the flange plate of the upper flange (2). Compared with the prior art, the invention has the advantages of convenient manufacture and installation, good stability, long service life, low maintenance cost and the like.
Description
Technical Field
The invention relates to the field of high-rise steel structure technology steel pipe frame towers, in particular to a high-neck tensioning anti-loosening flange connecting node and an installation method.
Background
With the development of high-rise steel structures and wind power generation towers, for the structures with obvious fatigue effect under the action of wind load and mechanical operation of the high-rise steel structures, particularly the wind power generation towers and the like, the tower cylinders or tower column segments are usually connected by flanges, the flange bolts are stressed greatly, the flanges are in a tension-compression alternating state under the action of fatigue cyclic load, the bolts are easy to loosen, the stress amplitude rises after the bolts are loosened, the fatigue life of the bolts is reduced rapidly, and even the fatigue fracture of the bolts can occur, so that the structure safety is influenced.
At present, the method for dealing with the loosening of the flange bolt in the wind power industry is to regularly re-twist the bolt, the number of the bolts is large, the maintenance workload is large, the torque coefficient is changed after the plastic deformation and the fretting wear of the thread occur, and the ideal conversion between the torque and the bolt tension cannot be necessarily ensured. And along with the continuous rising of wind tower wheel hub height, traditional single tube steel tower structural style faces the challenge, has appeared steel pipe framework formula wind tower structural scheme, compares tower section of thick bamboo flange, and this type of tower column flange bolt is maintained more difficultly.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the high-neck tensioning anti-loosening flange connecting node and the mounting method, which have the advantages of convenience in manufacturing and mounting, good stability and long service life, and can realize maintenance-free or greatly reduce the maintenance frequency so as to reduce the maintenance cost.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a high neck stretch-draw locking flange connected node, includes last segmentation steel pipe component, last flange, lower flange and the lower segmentation steel pipe component that from top to bottom connects gradually, last flange and lower flange pass through high strength bolt and connect, the flange plate of last flange and the flange plate of lower flange between be equipped with balanced stiff plate, balanced stiff plate and the flange plate fixed connection of last segmentation steel pipe component and last flange. The balance stiffening plate increases the length of the high-strength bolt, the strain energy stored by the high-strength bolt after tensioning is larger, the loss of the pretightening force of the bolt in the service period is reduced, the service life is long, and the stability is good.
Furthermore, the number of the high-strength bolts and the number of the balance stiffening plates are multiple, and the segmented steel pipe members above the high-strength bolts and the balance stiffening plates are uniformly and alternately arranged in the circumferential direction by taking the segmented steel pipe members as centers.
Furthermore, the lower flange is a forged flange, the strength and the fatigue resistance performance are high, the contact surface area of the flange plate of the lower flange is large, the smoothness of the contact surface is easy to guarantee, even if welding errors exist between the flange plate of the upper flange and the balance stiff plate on the horizontal plane, the contact surface attaching degree is not influenced, the stress of the connecting node is hardly influenced, and the requirement on the welding precision of the upper flange is reduced.
Further, the balance stiffening plate is fixedly connected with the upper sectional steel pipe component and the flange plate of the upper flange through a first welding seam, and the first welding seam is a T-shaped connecting welding seam or a fillet welding seam; the lower flange is connected with the lower sectional steel pipe component through a second welding line, and the second welding line is a double-sided full penetration butt welding line; the flange plate of the upper flange is connected with the upper subsection steel pipe component through a third welding line, and the third welding line is a full penetration or partial penetration T-shaped connecting welding line.
Furthermore, the balance stiffening plate is rectangular, the first arc-shaped notch is formed in the position, close to the flange plate of the upper flange, of the balance stiffening plate and the vertex angle of the upper segmented steel pipe component, intersection of the first welding line and the third welding line is avoided, the second notch is formed in the edge, close to the lower flange, of the balance stiffening plate, the upper flange and the lower flange are more easily abutted, and the actual condition of the whole connecting node is consistent with that of the calculation model.
The mounting method for the connecting node of the high-neck tensioning anti-loosening flange specifically comprises the following steps:
the method comprises the steps of fixedly connecting an upper segmented steel pipe component with a flange plate of an upper flange, fixedly connecting a balance stiffening plate with the upper segmented steel pipe component and the flange plate of the upper flange, fixedly connecting a lower flange with a lower segmented steel pipe component, and connecting the upper flange with the lower flange by adopting a direct stretching method through high-strength bolts, wherein the balance stiffening plate is positioned between the flange plate of the upper flange and the flange plate of the lower flange.
The balance stiffening plate increases the length of the high-strength bolt, the loss of pretightening force is less when the direct stretching method is adopted for construction, the strain energy stored by the high-strength bolt after the stretching is finished is larger, the loss of the pretightening force of the bolt in the service period is reduced, the stability of the bolt is good, the service life of the connecting joint is long,
compared with the prior art, the invention has the following beneficial effects:
(1) according to the invention, the balance stiffening plate is arranged between the flange plate of the upper flange and the flange plate of the lower flange, and the upper flange and the lower flange are connected through the high-strength bolt, so that the free length of the high-strength bolt is lengthened, the elastic strain energy of the high-strength bolt after being tensioned is improved, the influence on the pretightening force is reduced when the thread of the high-strength bolt has micro plastic deformation and fretting wear in the operation stage, the bolt pretightening force between the upper flange and the lower flange is kept stable, the maintenance cost is reduced, meanwhile, due to the lengthening of the high-strength bolt, the connection part of the lower flange and the lower segmented steel pipe component is far away from the stress concentration area of the connection node, the fatigue resistance of the connection part is improved, the stability of the connection node is further improved;
(2) according to the invention, the high-strength bolt is installed by adopting a direct stretching method, residual torque does not exist in the high-strength bolt after installation is finished, the phenomenon that the nut rotates due to the residual torque in the high-strength bolt under a stretching and pressing alternating state is avoided, the internal cause of nut rotation is eliminated, the nut is kept fastened, and the safety and the stability of the node are improved;
(3) according to the invention, the plurality of balance stiffening plates are uniformly and alternately arranged, so that the rigidity of the connecting node is high, and the stability is strong;
(4) the forged flange is used as the lower flange, the strength and the fatigue resistance are high, the smoothness of the contact surface is ensured, and the contact surface fitting degree is not influenced even if the welding error exists between the upper flange and the balance stiffening plate on the horizontal plane, so that the stress of the connecting node is not influenced, the fitting degree is good, and the requirement on the welding precision of the upper flange is reduced.
Drawings
FIG. 1 is an assembly view of a connection node;
FIG. 2 is an exploded view of a connection node;
FIG. 3 is a schematic structural view of the upper flange;
FIG. 4 is a schematic structural view of the lower flange;
1. the steel pipe comprises an upper segmented steel pipe component, 2 parts of an upper flange, 3 parts of a balance stiffening plate, 4 parts of a first welding line, 5 parts of an upper flange, 6 parts of a high-strength bolt, 7 parts of a second welding line, 8 parts of a lower segmented steel pipe component, 9 parts of a third welding line, 10 parts of a nut, 11 parts of a gasket, 31 parts of a first gap and 32 parts of a second gap.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
A high-neck tensioning anti-loosening flange connection node comprises an upper segmented steel pipe component 1, an upper flange 2, a lower flange 5 and a lower segmented steel pipe component 8 which are sequentially connected from top to bottom, wherein the upper flange 2 and the lower flange 5 are connected through a high-strength bolt 6, a nut 10 and a gasket 11, a balance stiffening plate 3 is arranged between a flange plate of the upper flange 2 and a flange plate of the lower flange 5, and the balance stiffening plate 3 is fixedly connected with the upper segmented steel pipe component 1 and the flange plate of the upper flange 2.
The number of the high-strength bolts 6 and the number of the balance stiffening plates 3 are both multiple, the segmented steel pipe members 1 above the multiple high-strength bolts 6 and the multiple balance stiffening plates 3 are uniformly arranged in a crossed mode in the circumferential direction, the rigidity of the connecting joint is large, and the stability is high.
The balance stiffening plate 3 is fixedly connected with the upper segmented steel pipe component 1 and the flange plate of the upper flange 2 through a first welding line 4, and the first welding line 4 is a full penetration T-shaped connecting welding line; the lower flange 5 is connected with a lower sectional steel pipe component 8 through a second welding seam 7, and the second welding seam 7 is a double-sided full penetration butt welding seam; the flange plate of the upper flange 2 is connected with the upper sectional steel pipe component 1 through a third welding line 9, and the third welding line 9 is a full penetration T-shaped connecting welding line.
The balance stiffening plate 3 is rectangular, and the balance stiffening plate 3 is provided with an arc-shaped first notch 31 close to the flange plate of the upper flange 2 and the vertex angle of the upper segmented steel pipe component 1, so that the intersection of the first welding seam 4 and the third welding seam 9 is avoided; the edge of the balance stiffening plate 3 close to the lower flange 5 is provided with a second gap 32, so that the upper flange 2 and the lower flange 5 are more easily pushed tightly, and the actual condition of the whole node is consistent with that of a calculation model.
Example 2
The first weld 4 in this example is a fillet weld, and the other steps are the same as in example 1.
Example 3
In this embodiment, the third weld 9 is a partially penetration T-shaped connecting weld, which can thicken the wall thickness of the flange plates of the upper segmented steel pipe member 1 and the upper flange 2, and increase the rigidity of the connecting joint, and the rest is the same as that in embodiment 1.
Example 4
The installation method adopting the high-neck tensioning anti-loosening flange connection node corresponding to the embodiment 1 specifically comprises the following steps:
welding flange plates of an upper segmented steel pipe component 1 and an upper flange 2, welding a balance stiffening plate 3 with the upper segmented steel pipe component 1 and the flange plates of the upper flange 2, welding a lower flange 5 with a lower segmented steel pipe component 8, carrying out grinding treatment on a welding seam and contact surfaces of the upper flange 2 and the lower flange 5, connecting the upper flange 2 and the lower flange 5 through a high-strength bolt 6 by adopting a direct stretching method, positioning the balance stiffening plate 3 between the flange plates of the upper flange 2 and the lower flange 5, and contacting the balance stiffening plate 3 and the upper segmented steel pipe component 1 with the flange plates of the lower flange 5.
The high-strength bolt 6 is constructed by adopting a direct stretching method, so that the high-strength bolt 6 is unidirectionally stretched, and the nut 10 is prevented from rotating under the condition of tension-shear complex stress for a long time and tension-compression alternation caused by residual torque.
All welding works are completed in a factory, and the upper flange 2 and the lower flange 5 are assembled through the high-strength bolts 6 on a construction site.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The utility model provides a tight flange connected node of gao neck stretch-draw, includes last segmentation steel pipe component (1), upper flange (2), lower flange (5) and lower segmentation steel pipe component (8) that from top to bottom connect gradually, upper flange (2) and lower flange (5) connect through high strength bolts (6), its characterized in that, the flange plate of upper flange (2) and the flange plate of lower flange (5) between be equipped with balanced stiff plate (3), balanced stiff plate (3) and the flange plate fixed connection of last segmentation steel pipe component (1) and upper flange (2).
2. The high-neck tensioning anti-loosening flange connecting joint according to claim 1, wherein the number of the high-strength bolts (6) and the number of the balance stiffening plates (3) are multiple, and the segmented steel pipe components (1) above the multiple high-strength bolts (6) and the multiple balance stiffening plates (3) are arranged in a uniformly crossed manner in a circumferential direction with the centers as centers.
3. A stretch-draw check flange connection node of a high neck as claimed in claim 1, wherein the lower flange (5) is a forged flange.
4. A stretch-draw anti-loose flange joint of high neck according to claim 1, characterized in that the balance stiffening plate (3) is fixedly connected with the upper segment steel pipe member (1) and the flange plate of the upper flange (2) by a first welding seam (4), and the first welding seam (4) is a T-shaped connecting welding seam or a fillet welding seam.
5. A stretch-draw check flange connection joint of high neck according to claim 1, characterized in that the lower flange (5) is connected with the lower segment steel pipe member (8) through a second weld (7), and the second weld (7) is a double-sided full penetration butt weld.
6. A stretch-draw check flange connection joint of high neck according to claim 1, characterized in that the flange plate of the upper flange (2) is connected with the upper sectional steel pipe member (1) by a third welding seam (9), and the third welding seam (9) is a T-shaped connecting welding seam.
7. A stretch-proof flange joint of high neck according to claim 1, characterized in that the balance stiffening plate (3) is rectangular.
8. A tension and looseness-proof flange connection node of a high neck as claimed in claim 7, wherein the balance stiffening plate (3) is provided with a first gap (31) for over welding near the flange plate of the upper flange (2) and the top corner of the upper segmented steel pipe member (1).
9. A stretch-proof flange joint of high neck according to claim 7, characterized in that the balance stiffening plate (3) is provided with a second notch (32) on the edge of the flange plate near the lower flange (5).
10. The installation method of the high-neck tensioning anti-loosening flange connection joint according to claim 1 is characterized by comprising the following steps:
the steel pipe connecting structure is characterized in that the upper segmented steel pipe component (1) is fixedly connected with a flange plate of the upper flange (2), the balance stiffening plate (3) is fixedly connected with the upper segmented steel pipe component (1) and the flange plate of the upper flange (2), the lower flange (5) is fixedly connected with the lower segmented steel pipe component (8), the upper flange (2) and the lower flange (5) are connected through the high-strength bolt (6) in a direct stretching method, and the balance stiffening plate (3) is located between the flange plate of the upper flange (2) and the flange plate of the lower flange (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011229572.9A CN112196746A (en) | 2020-11-06 | 2020-11-06 | High-neck tensioning anti-loosening flange connecting node and mounting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011229572.9A CN112196746A (en) | 2020-11-06 | 2020-11-06 | High-neck tensioning anti-loosening flange connecting node and mounting method |
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| Publication Number | Publication Date |
|---|---|
| CN112196746A true CN112196746A (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011229572.9A Pending CN112196746A (en) | 2020-11-06 | 2020-11-06 | High-neck tensioning anti-loosening flange connecting node and mounting method |
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| CN (1) | CN112196746A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217294A (en) * | 2021-06-25 | 2021-08-06 | 上海电气风电集团股份有限公司 | Tower bottom section structure, tower and wind driven generator |
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| CN205779496U (en) * | 2016-05-19 | 2016-12-07 | 江苏金海新能源科技有限公司 | A kind of tower reversed balancing flange |
| EP3392502A1 (en) * | 2017-04-20 | 2018-10-24 | Nordex Energy GmbH | Tower of a wind power plant, and method for building a tower of a wind power plant |
| CN208057316U (en) * | 2018-03-06 | 2018-11-06 | 中国电建集团华东勘测设计研究院有限公司 | A kind of Wind turbines steel reinforced concrete tower prestress wire Opposite direction connection flange arrangement |
| DE102017120488A1 (en) * | 2017-09-06 | 2019-03-07 | Nordex Energy Gmbh | Tower of a wind energy plant and longitudinal reinforcement for a tower of a wind energy plant |
| CN213627862U (en) * | 2020-11-06 | 2021-07-06 | 同济大学建筑设计研究院(集团)有限公司 | High-neck stretch-draw anti-loosening flange connection node |
-
2020
- 2020-11-06 CN CN202011229572.9A patent/CN112196746A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205779496U (en) * | 2016-05-19 | 2016-12-07 | 江苏金海新能源科技有限公司 | A kind of tower reversed balancing flange |
| EP3392502A1 (en) * | 2017-04-20 | 2018-10-24 | Nordex Energy GmbH | Tower of a wind power plant, and method for building a tower of a wind power plant |
| DE102017120488A1 (en) * | 2017-09-06 | 2019-03-07 | Nordex Energy Gmbh | Tower of a wind energy plant and longitudinal reinforcement for a tower of a wind energy plant |
| CN208057316U (en) * | 2018-03-06 | 2018-11-06 | 中国电建集团华东勘测设计研究院有限公司 | A kind of Wind turbines steel reinforced concrete tower prestress wire Opposite direction connection flange arrangement |
| CN213627862U (en) * | 2020-11-06 | 2021-07-06 | 同济大学建筑设计研究院(集团)有限公司 | High-neck stretch-draw anti-loosening flange connection node |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217294A (en) * | 2021-06-25 | 2021-08-06 | 上海电气风电集团股份有限公司 | Tower bottom section structure, tower and wind driven generator |
| CN113217294B (en) * | 2021-06-25 | 2022-07-01 | 上海电气风电集团股份有限公司 | Tower bottom section structure, tower and wind driven generator |
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