CN110016931A - A kind of novel pre-stressed anchor bolt blower foundation and method - Google Patents
A kind of novel pre-stressed anchor bolt blower foundation and method Download PDFInfo
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- CN110016931A CN110016931A CN201910400852.2A CN201910400852A CN110016931A CN 110016931 A CN110016931 A CN 110016931A CN 201910400852 A CN201910400852 A CN 201910400852A CN 110016931 A CN110016931 A CN 110016931A
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- blower foundation
- suppor
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000010276 construction Methods 0.000 claims abstract description 15
- 238000013461 design Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 238000012545 processing Methods 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
-
- 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)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses a kind of novel pre-stressed anchor bolt blower foundation and method, blower foundation includes anchor component, lower suppor component；Lower suppor component is connected by connector with the anchor component above it；The construction method of above-mentioned blower foundation, including Site Design, assembling lower suppor component, embedded embedded board, assembling anchor component, installation anchor component and lower suppor component, level and multiple steps such as pour.The present invention adds lower suppor component by the lower end in prestressed bolt, the difficulty of processing of longer anchor bolt raw material can not only be greatly reduced, and raw material dosage is saved as far as possible, to reduce construction cost, but also have the advantages that not having to pre- digging heavy platform and cable trench, work progress is easy easily to be realized, can reduce the costs such as prestressed bolt material, transport and blower foundation construction on the whole.
Description
Technical field
The present invention relates to a kind of blower foundation and method more particularly to a kind of novel pre-stressed anchor bolt blower foundation and sides
Method.
Background technique
Blower fan tower barrel is all that the foundation ring used connects with connection type a very long time of blower foundation.For tradition
The blower foundation of basic loop type, the part in foundation ring Transducers Embedded in Concrete is a rigid structure, and exposed portion and whole
A tower body is a flexible body again, in foundation ring and concrete foundation contact portion, is formed a stress concentration portion position, such as
Fruit blower foundation is excessive in the stress that this part material is defective or bears, it is easy to cause fatigue rupture at this position.
The appearance of prestressed bolt in recent years then avoids blower foundation and the possibility of the above problem occurs.
Prestressed bolt is made of the vertical anchor bolt of upper anchor slab, lower anchor slab and centre, and anchor bolt is poured in progress concrete
It is isolated with concrete when building by PVC pillar, when such anchor bolt under tension, entire anchor bolt is exactly an elastomer, not bullet
Property part and rigid element interface, so as to avoid concrete foundation stress concentration and destroy.But this is also to the material of anchor bolt
Matter and stress condition propose requirements at the higher level.
In practical application, due to the difference of blower single-machine capacity, length of blade, hub height etc., prestressed bolt embedment
The projected depth on basis is often not consistent with the design height of blower foundation, or even has larger difference.Traditional method is direct
Prestressed bolt is run through into blower foundation up and down, that is, the height of prestressed bolt is made into it is consistent with blower foundation, in this way
Although keeping foundation structure relatively simple, the waste of the higher anchor bolt material of great amount of cost is also resulted in simultaneously, and is significantly increased
The difficulty of processing and installation difficulty of material are added, because anchor bolt length is longer, difficulty of processing is bigger, and there are initial imperfections for material
Probability is also bigger.It is provided with circular lower anchor slab further, since enclosing under prestressed bolt, and cable tube generally can not be from anchor bolt
Between be pierced by, existing mounting means usually requires in prestressed bolt embedded part position to dig heavy platform in advance in advance and under blower foundation
Embedded cable trench, to guarantee the smooth installation of prestressed bolt and cable pipe laying.
Summary of the invention
In order to solve shortcoming present in above-mentioned technology, the present invention provides a kind of novel pre-stressed anchor bolt blower bases
Plinth and method.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of novel pre-stressed anchor bolt blower base
Plinth, including anchor component further include lower suppor component；Lower suppor component passes through connector and the anchor component phase above it
Connection；Anchor component includes upper anchor slab, lower anchor slab, anchor bolt；Anchor bolt is more, and more anchor bolts are uniformly arranged on anchor slab and cast anchor
Between plate；
Lower suppor component includes support column, top plate, embedded board；Top plate, embedded board are fixedly installed on support column respectively
Upper end, lower end；
Connector includes connecting plate, lag bolt, stay bolt；Connecting plate is set to the bottom surface of lower anchor slab by lag bolt fastening
On；One end of stay bolt is fixedly installed among the lower end of connecting plate, and the other end is screwed by adjusting nut and is set on top plate.
Further, lower suppor component is multiple, and multiple lower suppor components are uniformly distributed in the lower end of lower anchor slab.
Further, support column is steel pipe or I-steel.
Further, the centre of top plate offers the through-hole to match with stay bolt outer diameter, stay bolt pass through after through-hole with
Adjusting nut is tightened.
Further, matching is provided with adjusting nut on lag bolt, and lag bolt passes through after sequentially passing through connecting plate, lower anchor slab
Adjusting nut is tightened.
A kind of construction method of novel pre-stressed anchor bolt blower foundation, detailed process are as follows:
A, blower foundation height and anchor component height are designed according to field working conditions, and then determines lower suppor component
Height；
B, then top plate is welded in the upper end of support column, is assembled into lower part by support column vertical welding on embedded board
Supporting member；
C, it pours and buries embedded board in design requirement position after blower foundation bed course；Make cable pipe laying between embedded board
It is passed through in gap and carries out cabling, without embedded cable trench；
D, it fits together upper anchor slab, lower anchor slab, anchor bolt to form anchor component, and completes the binding of blower foundation reinforcing bar；
E, it will tighten on the top plate of the stay bolt insertion lower suppor component in connector and by adjusting nut, then lead to
It crosses lag bolt the lower anchor slab of anchor component is fixed on connecting plate, anchor component is made to be mounted on the top of lower suppor component；
F, part concreting first is carried out to blower foundation, makes to pour the level height that height is lower than top plate；Pass through tune
Section nut levels the anchor component of upper end, to be achieved to require to continue casting concrete after levelness until completing；
G, after the concrete in blower foundation reaches design requirement intensity, fan bottom section tower is installed, and to anchor bolt group
Part carries out tensioning subsequent construction.
The present invention adds lower suppor component by the lower end in prestressed bolt, and longer anchor bolt can not only be greatly reduced
The difficulty of processing of raw material, and raw material dosage is saved as far as possible, to reduce construction cost, but also has and do not have to pre- digging heavy platform and electricity
The advantages of cable groove, work progress is easy easily to be realized, can reduce prestressed bolt material, transport and blower base on the whole
The costs such as plinth construction.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is the structural schematic diagram of anchor component.
Fig. 3 is the structural schematic diagram of connector and lower suppor component.
Fig. 4 is the schematic diagram of the section structure of Fig. 3.
Fig. 5 is the schematic diagram of the section structure for pouring rear fan basis.
In figure: 1, anchor component；2, lower suppor component；3, upper anchor slab；4, lower anchor slab；5, anchor bolt；6, connecting plate；7, short
Bolt；8, stay bolt；9, adjusting nut；10, top plate；11, support column；12, embedded board.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1, a kind of novel pre-stressed anchor bolt blower foundation shown in Fig. 2, including anchor component 1, further include lower support
Component 2；Lower suppor component 2 is connected by connector with the anchor component 1 above it；Lower suppor component 2 be it is multiple, it is more
A lower suppor component is uniformly distributed in the lower end of lower anchor slab 4.Anchor component 1 includes upper anchor slab 3, lower anchor slab 4, anchor bolt 5；Anchor bolt
5 be more, and more anchor bolts are uniformly arranged between anchor slab 3 and lower anchor slab 4；
As shown in Figure 3, Figure 4, lower suppor component 2 includes support column 11, top plate 10, embedded board 12；Top plate 10, embedded board
12 are fixedly installed on the upper end of support column 11, lower end respectively；Support column 11 is steel pipe or I-steel.
Connector includes connecting plate 6, lag bolt 7, stay bolt 8；Connecting plate 6 is set to lower anchor slab 4 by the fastening of lag bolt 7
Bottom surface on；One end of stay bolt 8 is fixedly installed among the lower end of connecting plate 6, and the other end screws setting by adjusting nut 9
In on top plate 10.
The centre of top plate 10 offers the through-hole to match with 8 outer diameter of stay bolt, stay bolt 8 pass through after through-hole with adjust spiral shell
Mother 9 is tightened.
Matching is provided with adjusting nut on lag bolt 7, and lag bolt 7 passes through adjusting after sequentially passing through connecting plate 6, lower anchor slab 4
Nut tightening is fixed.
Since blower foundation and the projected depth of prestressed bolt buried foundation are often different, the present invention passes through in prestressing force
Lower suppor component is added in the lower end of anchor bolt, can make the sum of lower suppor component, height of prestressed bolt and blower foundation
Height it is equal, thus under the requirement for height for meeting original prestressed bolt, saving anchor bolt raw material as far as possible, and reduce original
The difficulty of processing of material.For example, the long anchor bolt length of traditional 3-4 rice to be reduced to 1-2 meters of design requirement.
A kind of construction method of novel pre-stressed anchor bolt blower foundation, detailed process are as follows:
A, blower foundation height is designed according to actual conditions such as live blower single-machine capacity, length of blade, hub heights
And anchor component height, and then determine the height of lower suppor component；
B, then top plate 10 is welded in the upper end of support column 11, group on embedded board 12 by 11 vertical welding of support column
Dress up lower suppor component；
C, it pours and buries embedded board 12 in design requirement position after blower foundation bed course；Make cable pipe laying between embedded board
Gap in pass through and carry out cabling, without embedded cable trench；
D, it fits together upper anchor slab 3, lower anchor slab 4, anchor bolt 5 to form anchor component, and completes blower foundation reinforcing bar and tie up
It pricks；
E, the stay bolt 8 in connector is inserted on the top plate 10 of lower suppor component and is tightened by adjusting nut, so
The lower anchor slab 4 of anchor component is fixed on connecting plate 6 by lag bolt 7 afterwards, anchor component is made to be mounted on lower suppor component
Top；
F, part concreting first is carried out to blower foundation, makes to pour the level height that height is lower than top plate 10；Pass through
Adjusting nut levels the anchor component of upper end, to be achieved to require to continue casting concrete after levelness until completing；It pours
The cross-section structure of blower foundation is as shown in Figure 5 after the completion of building；
G, after the concrete in blower foundation reaches design requirement intensity, fan bottom section tower is installed, and to anchor bolt group
Part carries out tensioning subsequent construction.
It can be seen that the present invention in prestressed anchor bolt without pre- digging heavy platform by above-mentioned form of construction work, need to only mention
The embedded board of preceding embedded compact, therefore construction efficiency can be greatly improved, save construction period；Further, since multiple
There is very spacious gap, cable pipe laying is also not required to bury cable trench under blower foundation, directly between lower suppor component
It connects and is embedded in concrete foundation from being pierced by between lower suppor component.Therefore, work progress of the present invention is easy easily realizes, whole
The costs such as prestressed bolt material, transport and blower foundation construction are reduced on body.
Above embodiment is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made within the scope of technical solution of the present invention, also belong to this hair
Bright protection scope.
Claims (6)
1. a kind of novel pre-stressed anchor bolt blower foundation, including anchor component (1), it is characterised in that: further include lower support structure
Part (2)；The lower suppor component (2) is connected by connector with the anchor component (1) above it；The anchor component
It (1) include upper anchor slab (3), lower anchor slab (4), anchor bolt (5)；The anchor bolt (5) is more, and more anchor bolts are uniformly arranged on anchor slab
(3) between lower anchor slab (4)；
The lower suppor component (2) includes support column (11), top plate (10), embedded board (12)；The top plate (10), embedded board
(12) it is fixedly installed on upper end, the lower end of support column (11) respectively；
The connector includes connecting plate (6), lag bolt (7), stay bolt (8)；The connecting plate (6) is tight by lag bolt (7)
On the fixed bottom surface for being placed in lower anchor slab (4)；One end of the stay bolt (8) is fixedly installed among the lower end of connecting plate (6), separately
One end is screwed by adjusting nut (9) and is set on top plate (10).
2. novel pre-stressed anchor bolt blower foundation according to claim 1, it is characterised in that: the lower suppor component
(2) to be multiple, multiple lower suppor components are uniformly distributed in the lower end of lower anchor slab (4).
3. novel pre-stressed anchor bolt blower foundation according to claim 2, it is characterised in that: the support column (11) is steel
Pipe or I-steel.
4. novel pre-stressed anchor bolt blower foundation according to claim 3, it is characterised in that: the centre of the top plate (10)
The through-hole to match with stay bolt (8) outer diameter is offered, stay bolt (8) is tightened after passing through through-hole with adjusting nut (9).
5. novel pre-stressed anchor bolt blower foundation according to claim 4, it is characterised in that: the lag bolt (7) on
With adjusting nut is provided with, lag bolt (7) sequentially passes through connecting plate (6), lower anchor slab (4) is tightened by adjusting nut afterwards.
6. a kind of construction method of novel pre-stressed anchor bolt blower foundation as claimed in claim 5, it is characterised in that: the side
The detailed process of method are as follows:
A, blower foundation height and anchor component height are designed according to field working conditions, and then determines the height of lower suppor component
Degree；
B, top plate (10) is then welded in the upper of support column (11) on embedded board (12) by support column (11) vertical welding
End, is assembled into lower suppor component；
C, it pours and buries embedded board (12) in design requirement position after blower foundation bed course；Make cable pipe laying between embedded board
It is passed through in gap and carries out cabling, without embedded cable trench；
D, upper anchor slab (3), lower anchor slab (4), anchor bolt (5) are fitted together and forms anchor component, and complete blower foundation reinforcing bar
Binding；
E, it will be tightened on the top plate (10) of stay bolt (8) the insertion lower suppor component in connector and by adjusting nut, so
The lower anchor slab (4) of anchor component is fixed on connecting plate (6) by lag bolt (7) afterwards, anchor component is made to be mounted on lower part branch
Support the top of component；
F, part concreting first is carried out to blower foundation, makes to pour the level height that height is lower than top plate (10)；Pass through tune
Section nut levels the anchor component of upper end, to be achieved to require to continue casting concrete after levelness until completing；
G, after the concrete in blower foundation reaches design requirement intensity, install fan bottom section tower, and to anchor component into
Row tensioning subsequent construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910400852.2A CN110016931A (en) | 2019-05-15 | 2019-05-15 | A kind of novel pre-stressed anchor bolt blower foundation and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910400852.2A CN110016931A (en) | 2019-05-15 | 2019-05-15 | A kind of novel pre-stressed anchor bolt blower foundation and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110016931A true CN110016931A (en) | 2019-07-16 |
Family
ID=67193672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910400852.2A Pending CN110016931A (en) | 2019-05-15 | 2019-05-15 | A kind of novel pre-stressed anchor bolt blower foundation and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110016931A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155546A (en) * | 2019-12-25 | 2020-05-15 | 湖北瑞宏新能源设备有限公司 | Prestressed anchor bolt fan foundation reinforcing device |
| CN111155548A (en) * | 2019-12-25 | 2020-05-15 | 湖北瑞宏新能源设备有限公司 | Prestressed anchor bolt foundation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202658620U (en) * | 2012-07-25 | 2013-01-09 | 中国二十二冶集团有限公司 | Mounting leveling device for fan foundation ring |
| CN203846843U (en) * | 2014-05-14 | 2014-09-24 | 闵怡红 | Pre-stress anchor bolt cage of wind power generation tower |
| CN104532871A (en) * | 2014-12-04 | 2015-04-22 | 瑞风能源（武汉）工程技术有限公司 | Fan foundation and pre-stress component for same |
| CN210658418U (en) * | 2019-05-15 | 2020-06-02 | 龙源（北京）风电工程设计咨询有限公司 | Novel prestressed anchor bolt fan foundation |
-
2019
- 2019-05-15 CN CN201910400852.2A patent/CN110016931A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202658620U (en) * | 2012-07-25 | 2013-01-09 | 中国二十二冶集团有限公司 | Mounting leveling device for fan foundation ring |
| CN203846843U (en) * | 2014-05-14 | 2014-09-24 | 闵怡红 | Pre-stress anchor bolt cage of wind power generation tower |
| CN104532871A (en) * | 2014-12-04 | 2015-04-22 | 瑞风能源（武汉）工程技术有限公司 | Fan foundation and pre-stress component for same |
| CN210658418U (en) * | 2019-05-15 | 2020-06-02 | 龙源（北京）风电工程设计咨询有限公司 | Novel prestressed anchor bolt fan foundation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155546A (en) * | 2019-12-25 | 2020-05-15 | 湖北瑞宏新能源设备有限公司 | Prestressed anchor bolt fan foundation reinforcing device |
| CN111155548A (en) * | 2019-12-25 | 2020-05-15 | 湖北瑞宏新能源设备有限公司 | Prestressed anchor bolt foundation |
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| PB01 | Publication | ||
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| CB02 | Change of applicant information |
Country or region after: China Address after: 100032 9th floor, 6 Fuchengmen North Street, Xicheng District, Beijing Applicant after: Longyuan (Beijing) New Energy Engineering Design and Research Institute Co.,Ltd. Address before: 100032 9th floor, 6 Fuchengmen North Street, Xicheng District, Beijing Applicant before: LONGYUAN (BEIJING) WIND POWER ENGINEERING & CONSULTING CO.,LTD. Country or region before: China |
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