CN105909477A - Transition section structure connecting steel tower drum with prestressed concrete tower drum - Google Patents
Transition section structure connecting steel tower drum with prestressed concrete tower drum Download PDFInfo
- Publication number
- CN105909477A CN105909477A CN201610246865.5A CN201610246865A CN105909477A CN 105909477 A CN105909477 A CN 105909477A CN 201610246865 A CN201610246865 A CN 201610246865A CN 105909477 A CN105909477 A CN 105909477A
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- CN
- China
- Prior art keywords
- concrete
- flange
- annular
- prestressing
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 78
- 239000010959 steel Substances 0.000 title claims abstract description 78
- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 10
- 230000007704 transition Effects 0.000 title claims abstract description 10
- 239000004567 concrete Substances 0.000 claims abstract description 78
- 238000004873 anchoring Methods 0.000 claims abstract description 11
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 11
- 210000002435 tendon Anatomy 0.000 claims abstract description 8
- 210000003205 muscle Anatomy 0.000 claims description 31
- 239000002689 soil Substances 0.000 claims description 6
- 238000005336 cracking Methods 0.000 abstract 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 7
- 239000012141 concentrate Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a transition section structure connecting a steel tower drum with a prestressed concrete tower drum. The transition section structure comprises a first connecting steel drum, a second connecting steel drum, an annular supporting plate and a concrete section. The steel tower drum is connected with the first connecting steel drum through a first flange. The first connecting steel drum is connected with the second connecting steel drum through a second flange. The second connecting steel drum is connected with the concrete section through the annular supporting plate. The concrete section is connected with the concrete tower drum. Internal prestressed tendons and external prestressed tendons are anchored on the second flange correspondingly and successively. An internal annular anchoring steel plate and an external annular anchoring steel plate are welded to the lower surface of the annular supporting plate. Reinforcing ribs are arranged between the second flange and the annular supporting plate. Vertical reinforcing plates are evenly arranged between the internal annular anchoring steel plate and the external annular anchoring steel plate along the circumference. By adopting the transition section structure, the problems that concrete towers are prone to cracking and internal prestressed tendons anchored outside tower drums are hard to maintain are solved.
Description
Technical field
The present invention relates to the technical field of blower fan pylon, refer in particular to a kind of connection steel tower tube and prestressed concrete
The transition section structure of soil tower.
Background technology
Wind energy is a kind of renewable and clean energy resource, and its storage level is big, is that current world community falls over each other the new of exploitation
One of energy pattern.At present, wind power generating set trends towards high-power, needs enough hub heights
Obtain more wind energy, more and more higher in the tower height being used to support wind power generating set.Meanwhile,
Along with impeller diameter increases, the load that wind load produces is the most increasing so that tower weight is increasing.With
The development of wind generating technology, occur in that concrete-steel combination pylon, i.e. existing steel tower is erected at mixed
Coagulate on soil pylon thus improve wind wheel height.
Prior art uses the stretch-draw anchor directly carrying out presstressed reinforcing steel on the flange contacted with top of concrete
Gu, stretching process easily causes regional area concrete stress and concentrates, cause concrete rupture.
In prior art, the position of prestressing with bond muscle stretch-draw anchor is in the outside of tower, if in advance should in using
Power muscle occurs lax to need pretension or presstressed reinforcing steel to be pulled off to need to change, and attendant needs outside tower
Face carries out operation, brings the biggest inconvenience and personal safety hidden danger to attendant.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of connection steel tower tube and prestressing force mix
The transition section structure of solidifying soil tower, can effectively solve concrete tower and easily ftracture and be anchored at outside tower
The problem that the prestressing with bond muscle in portion is difficult in maintenance.
For achieving the above object, technical scheme provided by the present invention is: a kind of connection steel tower tube and prestressing force
The transition section structure of concrete tower, including the first company that upper and lower two sections of central axes and radius are consistent
Connect steel cylinder and second and connect steel cylinder, and the first flange, the second flange, annular backup pad, concrete segment；Institute
Stating steel tower tube to be connected with the first end face connecting steel cylinder by the first flange, described first connects steel cylinder passes through the
Two flanges and second connect steel cylinder and connect, and described second connects steel cylinder by annular backup pad with concrete segment even
Connecing, described concrete segment is connected with concrete tower, and described concrete tower is fixed on the coagulation soil matrix on ground
On plinth；Being taken up in order of priority anchoring to have prestressing with bond muscle and external prestressing steels on described second flange, this is internal
The anchorage point of presstressed reinforcing steel is near the first barrel connecting steel cylinder, and the anchorage point of this external prestressing steels is remote
From the first barrel connecting steel cylinder；Described annular backup pad connects with the end face of concrete segment, this annular brace
Plate is welded under inner annular anchor plate and outer annular anchor plate, this inside and outside annular anchor plate
Central axis and above-mentioned first, second central axes being connected steel cylinder, wherein inner annular anchoring steel
The radius of plate is consistent with the inner side annulus radius of annular backup pad, the radius of outer annular anchor plate and annular
The outside annulus radius of gripper shoe is consistent, and described annular backup pad circumferentially offers multiple concrete grouting
Hole, by concrete grouting hole fill concrete between two annular anchor plates；Described second flange and ring
Being provided with the ribs of interlaced arrangement between shape gripper shoe, the second flange is separated by ribs with concrete segment；Institute
State and between inner annular anchor plate and outer annular anchor plate, be circumferentially evenly arranged with multiple vertical reinforcement
Plate, the end face of vertical reinforcing plate is connected with annular backup pad, and its side anchors with respective inner annular
Steel plate or outer annular anchor plate connect；It is equipped with multiple internal on described second flange and annular backup pad
Prestressed pore passage and external prestressing duct, described prestressing with bond muscle passes the second flange and annular backup pad
Upper corresponding prestressing with bond duct enters in concrete segment, and down through this concrete segment and concrete towers
Cylinder is connected in concrete foundation；Described external prestressing steels is through corresponding on the second flange and annular backup pad
External prestressing duct, pass from concrete segment and be connected in concrete foundation.
The bottom surface of described annular backup pad is provided with the anchor bar extending downwardly in concrete segment, and described anchoring
Reinforcing bar and concrete segment are an entirety admittedly.
On the plate face that described inner annular anchor plate is relative with outer annular anchor plate each even equipped with steel anchor
Bolt.
It is formed with taper seat between internal face and the internal face of concrete segment of described inner annular anchor plate.
Be provided with prestressing with bond in described concrete segment and wear muscle hole and external prestressing wears muscle hole, this internal pre-should
Power is provided with internal muscle built-in steel sleeve in wearing muscle hole, this external prestressing is provided with external tendon with pre-in wearing muscle hole
Bury steel bushing.
The present invention compared with prior art, has the advantage that and beneficial effect:
The present invention is multiple along week by arranging between concrete segment end face and the second flange of anchoring prestress muscle
To uniform ribs, presstressed reinforcing steel being anchored face to separate with top of concrete, optimizing stress distribution and stress pass
Pass path, reduce stress and concentrate the tension of prestressed tendon caused to anchor the destruction that concrete is caused；Meanwhile,
Internal and external prestressing steels are arranged at inside tower, consequently facilitating presstressed reinforcing steel is safeguarded by the later stage,
Reduce O&M cost.
Accompanying drawing explanation
Fig. 1 is transition section structure schematic diagram.
Fig. 2 is that changeover portion assembles schematic diagram.
Fig. 3 is the assembling schematic diagram after changeover portion cast concrete.
Fig. 4 is the A-A sectional view of Fig. 3.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
As shown in Figures 1 to 4, the connection steel tower tube described in the present embodiment and the mistake of prestressed concrete tower cylinder
Cross segment structure, including the first connection steel cylinder 3 and second that upper and lower two sections of central axes and radius are consistent
Connect steel cylinder 12, and first flange the 2, second flange 4, annular backup pad 8, prestressing with bond muscle 14, body
External prestressed muscle 13, concrete segment 15；Described steel tower tube 1 is connected steel cylinder 3 by the first flange 2 with first
End face connect, described first connects steel cylinder 3 is connected steel cylinder 12 by the second flange 4 with second and connects, institute
State the second connection steel cylinder 12 to be connected with concrete segment 15 by annular backup pad 8, described concrete segment 15 and
Concrete tower 26 connects, and described concrete tower 26 is fixed in the concrete foundation on ground；Described body
Interior presstressed reinforcing steel 14 and external prestressing steels 13 are taken up in order of priority and are anchored on the second flange 4, this internal pre-should
The anchorage point of power muscle 14 is near the first barrel connecting steel cylinder 3, the anchoring position of this external prestressing steels 13
Put away from the first barrel connecting steel cylinder 3；Described annular backup pad 8 connects with the end face of concrete segment 15,
This annular backup pad 8 is welded under inner annular anchor plate 16 and outer annular anchor plate 17, this is interior,
The central axis of outer ring anchor plate 16,17 and above-mentioned first, second central shaft being connected steel cylinder 3,12
Line overlaps, and wherein the radius of inner annular anchor plate 16 is consistent with the inner side annulus radius of annular backup pad 8,
The radius of outer annular anchor plate 17 is consistent with the outside annulus radius of annular backup pad 8, and described annular is propped up
Multiple concrete grouting hole 5 is circumferentially offered, by concrete grouting hole 5 to two annular anchors on fagging 8
Gu fill concrete between steel plate；It is provided with adding of interlaced arrangement between described second flange 4 and annular backup pad 8
Strong rib 7 improves the rigidity of the second flange 4, and meanwhile, ribs 7 is by the second flange 4 of anchoring prestress muscle
Separating with concrete segment 15, stress when can reduce stretch-draw anchor is concentrated；Described inner annular anchor plate
Some vertical reinforcing plates 20 circumferentially it are evenly arranged with between 16 and outer annular anchor plate 17, all perpendicular
All being connected with annular backup pad 8 to the end face of reinforcing plate 20, the side of the vertical reinforcing plate 20 of a part is with interior
Portion's annular anchor plate 16 connects, the side of the vertical reinforcing plate of another part 20 and outer annular anchor plate
17 connect；Second flange 4 is provided with multiple prestressing with bond duct 18 and external prestressing duct 19, with
Time, annular backup pad 8 be provided with multiple with the second flange 4 on prestressing with bond duct 18 and external pre-should
Prestressing with bond duct 6 one to one, power duct 19 and external prestressing duct 27, described prestressing with bond
Muscle 14 enters concrete through prestressing with bond duct 18 corresponding on the second flange 4 and annular backup pad 8
In section 15, and down it is connected in concrete foundation through this concrete segment 15 and concrete tower 26；Institute
State external prestressing steels 13 and pass corresponding external prestressing duct 19 on the second flange 4 and annular backup pad 8,
Pass from concrete segment 15 and be connected in concrete foundation.
The bottom surface of annular backup pad 8 is provided with the anchor bar 11 extended downwardly in concrete segment 15, and described anchor
Gu reinforcing bar 11 and concrete segment 15 are an entirety admittedly, the globality of changeover portion can be improved, can support simultaneously
Bending resistance square and shearing force.
On the plate face that inner annular anchor plate 16 is relative with outer annular anchor plate 17 each even equipped with steel anchor
Bolt 9, improves the integral rigidity of changeover portion, improves the stress distribution of Path of Force Transfer and concrete, it is to avoid stress
The even stress of skewness is concentrated.
It is formed between internal face 21 and the internal face 23 of concrete segment 15 of inner annular anchor plate 16
Taper seat 22, can avoid stress to concentrate.
It is provided with prestressing with bond in described concrete segment 15 and wears muscle hole 28 and external prestressing wears muscle hole 29, should
Prestressing with bond is provided with internal muscle built-in steel sleeve 24 in wearing muscle hole 28, this external prestressing wears muscle hole 29
Inside it is provided with external tendon built-in steel sleeve 25.
In sum, the present invention is by being arranged on inside tower by presstressed reinforcing steel anchorage point, it is simple to the later stage pair
Prestressing with bond muscle is safeguarded, reduces maintenance cost；Tension of prestressed tendon anchorage point is away from concrete top
Face, centre is connected by ribs, uses this structure so that the power that upper steel tower produces is passed through even
Connect steel cylinder and flange is delivered to prestressed component, improve stress distribution, reduce stretching prestressed component anchor
Gu time stress concentrate and cause the excessive problem of concrete local stress, it also avoid stretch-draw anchor and cause coagulation
Rupturing of soil, is worthy to be popularized.
Embodiment described above is only the preferred embodiments of the invention, not limits the enforcement model of the present invention with this
Enclose, therefore the change that all shapes according to the present invention, principle are made, all should contain within the scope of the present invention.
Claims (5)
1. the transition section structure connecting steel tower tube and prestressed concrete tower cylinder, it is characterised in that: include
Upper and lower two sections of central axes and consistent the first connection steel cylinder and second of radius connect steel cylinder, and first
Flange, the second flange, annular backup pad, concrete segment；Described steel tower tube is by the first flange and first even
The end face connecing steel cylinder connects, and described first connects steel cylinder connects steel cylinder connection, institute by the second flange and second
State the second connection steel cylinder to be connected with concrete segment by annular backup pad, described concrete segment and concrete tower
Connecting, described concrete tower is fixed in the concrete foundation on ground；It is taken up in order of priority on described second flange
Anchoring has prestressing with bond muscle and external prestressing steels, and the anchorage point of this prestressing with bond muscle is near first even
Connecing the barrel of steel cylinder, the anchorage point of this external prestressing steels is away from the first barrel connecting steel cylinder；Described ring
Shape gripper shoe connects with the end face of concrete segment, and this annular backup pad is welded under inner annular anchor plate
With outer annular anchor plate, the central axis of this inside and outside annular anchor plate is with above-mentioned first, second even
Connect the central axes of steel cylinder, the wherein radius of inner annular anchor plate and the interior side ring of annular backup pad
Radius surface is consistent, and the radius of outer annular anchor plate is consistent with the outside annulus radius of annular backup pad, institute
State and on annular backup pad, circumferentially offer multiple concrete grouting hole, by concrete grouting hole to two rings
Fill concrete between shape anchor plate；It is provided with adding of interlaced arrangement between described second flange and annular backup pad
Strong rib, the second flange is separated by ribs with concrete segment；Described inner annular anchor plate and outer annular
Multiple vertical reinforcing plate, the end face of vertical reinforcing plate and annular circumferentially it is evenly arranged with between anchor plate
Fagging connects, and its side is connected with respective inner annular anchor plate or outer annular anchor plate；
Multiple prestressing with bond duct and external prestressing duct it is equipped with on described second flange and annular backup pad,
Described prestressing with bond muscle enters mixed through prestressing with bond duct corresponding on the second flange and annular backup pad
In solidifying soil section, and down it is connected in concrete foundation through this concrete segment and concrete tower；Described body
External prestressed muscle is through external prestressing duct corresponding on the second flange and annular backup pad, from concrete segment
In pass and be connected in concrete foundation.
A kind of changeover portion knot connecting steel tower tube and prestressed concrete tower cylinder the most according to claim 1
Structure, it is characterised in that: the bottom surface of described annular backup pad is provided with the anchor bar extending downwardly in concrete segment,
And described anchor bar and concrete segment are one overall admittedly.
A kind of changeover portion knot connecting steel tower tube and prestressed concrete tower cylinder the most according to claim 1
Structure, it is characterised in that: each on the plate face that described inner annular anchor plate is relative with outer annular anchor plate
Even equipped with steel crab-bolt.
A kind of changeover portion knot connecting steel tower tube and prestressed concrete tower cylinder the most according to claim 1
Structure, it is characterised in that: shape between internal face and the internal face of concrete segment of described inner annular anchor plate
Become to have taper seat.
A kind of changeover portion knot connecting steel tower tube and prestressed concrete tower cylinder the most according to claim 1
Structure, it is characterised in that: it is provided with prestressing with bond in described concrete segment and wears muscle hole and external prestressing wears muscle hole,
This prestressing with bond is provided with internal muscle built-in steel sleeve in wearing muscle hole, this external prestressing is provided with in wearing muscle hole
External tendon built-in steel sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610246865.5A CN105909477B (en) | 2016-04-20 | 2016-04-20 | A kind of transition section structure of connection steel tower tube and prestressed concrete tower cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610246865.5A CN105909477B (en) | 2016-04-20 | 2016-04-20 | A kind of transition section structure of connection steel tower tube and prestressed concrete tower cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105909477A true CN105909477A (en) | 2016-08-31 |
| CN105909477B CN105909477B (en) | 2018-08-14 |
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| CN201610246865.5A Active CN105909477B (en) | 2016-04-20 | 2016-04-20 | A kind of transition section structure of connection steel tower tube and prestressed concrete tower cylinder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481515A (en) * | 2016-10-08 | 2017-03-08 | 霍尔果斯新国金新能源科技有限公司 | Concrete towers cartridge module and its method for stretching |
| CN106640542A (en) * | 2016-10-08 | 2017-05-10 | 霍尔果斯新国金新能源科技有限公司 | Concrete tower cylinder module and bonding method thereof |
| CN113914700A (en) * | 2021-10-21 | 2022-01-11 | 重庆大学 | Reinforced structure for concrete transfer section of wind turbine generator and construction method |
| CN116906273A (en) * | 2023-07-24 | 2023-10-20 | 湖南大学 | Concrete-steel mixing tower section of thick bamboo changeover portion connecting device |
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| JP2005330675A (en) * | 2004-05-19 | 2005-12-02 | Sumitomo Mitsui Construction Co Ltd | Tower-like structure |
| DE102011001250A1 (en) * | 2011-03-14 | 2012-09-20 | Strabag Offshore Wind Gmbh | Apparatus and method for the transition between a steel tower section and a prestressed concrete tower section |
| CN202493386U (en) * | 2012-02-22 | 2012-10-17 | 阜新金胤新能源技术咨询有限公司 | External prestressing steel and concrete wind power tower |
| CN202500731U (en) * | 2012-02-22 | 2012-10-24 | 阜新金胤新能源技术咨询有限公司 | Internal prestressed steel-concrete wind power tower |
| CN202545137U (en) * | 2012-04-24 | 2012-11-21 | 阜新金胤新能源技术咨询有限公司 | Internally-prestressed planted bar connection type concrete wind power tower |
| CN103994034A (en) * | 2014-06-13 | 2014-08-20 | 湖南大学 | Connection device of prestress concrete and steel combination wind power generation tower |
| CN205638803U (en) * | 2016-04-20 | 2016-10-12 | 广东明阳风电产业集团有限公司 | Changeover portion structure of connecting a steel tower section of thick bamboo and a prestressed concrete tower section of thick bamboo |
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2016
- 2016-04-20 CN CN201610246865.5A patent/CN105909477B/en active Active
Patent Citations (7)
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| JP2005330675A (en) * | 2004-05-19 | 2005-12-02 | Sumitomo Mitsui Construction Co Ltd | Tower-like structure |
| DE102011001250A1 (en) * | 2011-03-14 | 2012-09-20 | Strabag Offshore Wind Gmbh | Apparatus and method for the transition between a steel tower section and a prestressed concrete tower section |
| CN202493386U (en) * | 2012-02-22 | 2012-10-17 | 阜新金胤新能源技术咨询有限公司 | External prestressing steel and concrete wind power tower |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481515A (en) * | 2016-10-08 | 2017-03-08 | 霍尔果斯新国金新能源科技有限公司 | Concrete towers cartridge module and its method for stretching |
| CN106640542A (en) * | 2016-10-08 | 2017-05-10 | 霍尔果斯新国金新能源科技有限公司 | Concrete tower cylinder module and bonding method thereof |
| CN113914700A (en) * | 2021-10-21 | 2022-01-11 | 重庆大学 | Reinforced structure for concrete transfer section of wind turbine generator and construction method |
| CN116906273A (en) * | 2023-07-24 | 2023-10-20 | 湖南大学 | Concrete-steel mixing tower section of thick bamboo changeover portion connecting device |
| CN116906273B (en) * | 2023-07-24 | 2024-06-18 | 湖南大学 | Concrete-steel mixing tower section of thick bamboo changeover portion connecting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105909477B (en) | 2018-08-14 |
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Address after: 528437 Guangdong torch hi tech Industrial Development Zone, Torch Road, No. 22, Ming Yang Industrial Park, Zhongshan Applicant after: MING YANG SMART ENERGY GROUP Co.,Ltd. Address before: 528437 Guangdong torch hi tech Industrial Development Zone, Torch Road, No. 22, Ming Yang Industrial Park, Zhongshan Applicant before: GUANGDONG MINGYANG WIND POWER INDUSTRY GROUP Co.,Ltd. |
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Effective date of registration: 20230703 Address after: No. 1, Xingfu Avenue, Advanced Manufacturing Development Zone, Shangcheng County, Xinyang City, Henan Province 465246 Patentee after: Henan Mingyang New Material Technology Engineering Co.,Ltd. Address before: 528437 Mingyang Industrial Park, No. 22 Torch Road, Torch High-tech Industrial Development Zone, Zhongshan City, Guangdong Province Patentee before: MING YANG SMART ENERGY GROUP Co.,Ltd. |