CN107151978A - Bridge vibration damping holder - Google Patents
Bridge vibration damping holder Download PDFInfo
- Publication number
- CN107151978A CN107151978A CN201710435829.8A CN201710435829A CN107151978A CN 107151978 A CN107151978 A CN 107151978A CN 201710435829 A CN201710435829 A CN 201710435829A CN 107151978 A CN107151978 A CN 107151978A
- Authority
- CN
- China
- Prior art keywords
- damping
- bridge
- seat assembly
- cavity
- sleeve
- 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
- 238000013016 damping Methods 0.000 title claims abstract description 67
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000009434 installation Methods 0.000 claims abstract description 15
- 239000006096 absorbing agent Substances 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 125000006850 spacer group Chemical group 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 7
- 238000006073 displacement reaction Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of bridge vibration damping holder, including for the upper seat assembly being connected with bridge beam body and being connected to bridge pier and the lower seat assembly of damping being formed to the horizontal movement of upper seat assembly, upper seat assembly, which is slidably supported, to be arranged on lower seat assembly；At least two vibration absorber for the vibration damping of load up and down to bridge beam body that upper seat assembly includes upper pedestal and is arranged on upper pedestal, the each vibration absorber of pedestal correspondence, which is set, is formed with installation cavity, and each vibration absorber includes torsion damping mechanism and the movement conversion mechanism for being converted to rotary motion and driving torsion damping mechanism to work the up-down vibration of bridge beam body；It can realize different antivibration effects under different stress conditions, substantially increase durability and ductility, can be prevented effectively from the damage that external force is caused to bridge.
Description
Technical field
The present invention relates to bridge vibrationproof field, more particularly to a kind of bridge vibration damping holder.
Background technology
With the development and the raising of construction standard of transportation, bearing in bridge and Other Engineering not only
Play a supporting role, but also with vibration damping, resistance to plucking, release moment of flexure, the effect of resist displacement.At present, occur often in earthquake pre-
The situation that bridge plate processed falls from bridge pier beam, the reason for bridge plate falls from bridge pier beam is, is shaken when generation is larger
When dynamic, very big horizontal force and vertical force are generated, makes the displacement of precast bridge occurred level and upper and lower displacement, when displacement exceedes
Precast bridge plate shelving after width on bridge pier, bridge plate will fall, and now, not only bridge is damaged, and
Serious accident occurs in pedestrian and vehicle on bridge, under bridge.
The content of the invention
In view of this, the present invention provides a kind of bridge vibration damping holder, and it can realize different resist under different stress conditions
Shake effect, substantially increase durability and ductility, the damage that external force is caused to bridge can be prevented effectively from.
The bridge vibration damping holder of the present invention, including for the upper seat assembly being connected with bridge beam body and it is connected to bridge pier
And the lower seat assembly damped is formed to the horizontal movement of upper seat assembly, upper seat assembly, which is slidably supported, is arranged at lower seat
On assembly；
Upper seat assembly, which includes upper pedestal and at least two be arranged on upper pedestal, is used for the load up and down to bridge beam body
The vibration absorber of vibration damping, each vibration absorber of pedestal correspondence, which is set, is formed with installation cavity, and each vibration absorber includes torsion damping
Mechanism and the motion conversion for being converted to rotary motion and driving torsion damping mechanism to work the up-down vibration of bridge beam body
Mechanism, torsion damping mechanism include with can relatively rotate and sealedly mode be arranged at axle sleeve in installation cavity and from upper pedestal to
Extension is formed in installation cavity the first spacer and the second spacer, the outside of axle sleeve is respectively formed and is close to the first spacer and the second spacer
Set and installation cavity is divided into the first damping cavity and the second damping cavity, the first damping cavity and the second damping cavity filled with resistance
Buddhist nun's liquid；
The first arc rotor block and the second arc rotor block, the first arc rotor position have radially been symmetrically formed on axle sleeve
In in the first damping cavity and being divided into the first working chamber and the second working chamber, and the first arc rotor block and the first damping cavity
Cavity wall between be formed with connection the first working chamber and the second working chamber the first damp channel, the second arc rotor block be located at second
Damping cavity is interior and is divided into the 3rd working chamber and the 4th working chamber, and the cavity wall of the second arc rotor block and the second damping cavity
Between be formed with connection the 3rd working chamber and the 4th working chamber the second damp channel.
Further, movement conversion mechanism includes screw rod and interior be placed in axle sleeve forms a fixed connection and coordinated with screw flight
Thread bush.
Further, lower seat assembly includes substrate and is integrally formed at least one sleeve being arranged on substrate, each sleeve
Inside it is provided with that its internal cavities is divided into two-part piston and is connected with piston and stretches out sleeve and connects with upper pedestal bottom
The piston rod connect, is formed with annular damper passage, each sleeve between the circumference and sleeve lining of piston and is filled with damping fluid.
Further, the top of each sleeve is each formed with slideway, and the bottom each chute of correspondence of upper pedestal is provided with slip
The slide rail of cooperation.
Further, piston rod is the U-shaped structure being made up of the horizontal body portion of both sides vertical portion and connection vertical portion, its horizontal body portion
Set through sleeve, the upper end of both sides vertical portion is fixedly connected with the bottom of upper pedestal.
Beneficial effects of the present invention：The bridge vibration damping holder of the present invention, due to the presence of vibration absorber in upper seat assembly, when
When bridge beam body the vibration of above-below direction occurs under load effect, movement conversion mechanism enters the up and down motion of bridge beam body
And the up and down motion for driving torsion damping mechanism to be operated to bridge beam body is damped, exist so as to effectively resist bridge beam body
The vibration occurred on vertical direction；When the displacement of horizontal direction occurs in bridge beam body, seat assembly and lower seat assembly shape are now gone up
Into the damping structure of an entirety, beam body drives upper seat assembly to move in the horizontal direction, and this seat assembly can be to the seat of honour at present
The horizontal movement of assembly forms damping, so as to resist the displacement in beam body horizontal direction；The present invention is simple in construction, using reliable,
It is the displacement shape to bridge beam body horizontally and vertically direction by single vibration damping holder with preferable integration and globality
Into damping, so as to be prevented effectively from the damage that external force is caused to bridge.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is schematic structural view of the invention；
Fig. 2 be in Fig. 1 A-A to structural representation.
Embodiment
Fig. 1 is schematic structural view of the invention, and Fig. 2 is that A-A is to structural representation in Fig. 1, as shown in the figure：The bridge of the present embodiment
Beam vibration damping holder, including for the upper seat assembly being connected with bridge beam body and it is connected to bridge pier and to the level of upper seat assembly
Motion forms the lower seat assembly of damping, and upper seat assembly, which is slidably supported, to be arranged on lower seat assembly；
Upper seat assembly, which includes upper pedestal 1 and at least two be arranged on upper pedestal 1, is used for the upper download to bridge beam body
The vibration absorber of lotus vibration damping, each vibration absorber of pedestal correspondence, which is set, is formed with installation cavity, and each vibration absorber subtracts including torsion
Mechanism of shaking and the motion turn for being converted to rotary motion and driving torsion damping mechanism to work the up-down vibration of bridge beam body
Converting mechanism, torsion damping mechanism includes to relatively rotate and sealedly mode is arranged at axle sleeve 2 in installation cavity and by the seat of honour
Body 1 extends the first spacer 3 and the second spacer 4 of formation, the outside of axle sleeve 2 and the first spacer 3 and the second spacer 4 into installation cavity
It is respectively formed and is close to set and installation cavity is divided into the first damping cavity and the second damping cavity, the first damping cavity and the second damping cavity
It is filled with damping fluid；As illustrated, upper pedestal 1 is square structure, four vibration absorbers are set altogether on upper pedestal 1；
The first arc rotor block 5 and the second arc rotor block 6, the first arc rotor have radially been symmetrically formed on axle sleeve 2
Body 5 is located in the first damping cavity and is divided into the first working chamber 7 and the second working chamber 8, and the first arc rotor block 5 and the
The first damp channel 9 of the first working chamber 7 of connection and the second working chamber 8 is formed between the cavity wall of one damping cavity, the second arc turns
Daughter 6 is located in the second damping cavity and is divided into the 3rd working chamber 10 and the 4th working chamber 11, and the second arc rotor block 6
The second damp channel 12 for connecting the 3rd working chamber 10 and the 4th working chamber 11 is formed between the cavity wall of the second damping cavity；Axle sleeve
Coordinated on the outside of 2 axial two ends by bearing 22 in corresponding installation cavity with the formation rotational support of upper pedestal 1, and axle sleeve 2
Outside and the axial two ends of installation cavity, which are formed, to be sealed, and position forms damping cavity in the middle.
In the present embodiment, movement conversion mechanism includes screw rod 13 and interior be placed in axle sleeve 2 forms a fixed connection and and screw rod
The thread bush 14 that 13 screw threads coordinate；The upper end of screw rod 13 is provided with connecting plate or anchor plate 23 for being connected with bridge, screw rod
13 coordinate with the screw thread of thread bush 14, when being moved up and down by bridge beam body, thread bush 14 can be driven to rotate, thread bush and axle
Set is fixedly and coaxially connected, so as to drive axle sleeve 2 and arc rotor block to rotate, realizes torsion damping.
In the present embodiment, lower seat assembly includes substrate 15 and is integrally formed at least one sleeve being arranged on substrate 15
16, it is provided with each sleeve 16 and its internal cavities is divided into two-part piston 17 and is connected with piston 17 and stretches out set
The piston rod 18 that cylinder 16 is connected with the bottom of upper pedestal 1, annular damper passage is formed between the circumference and the inwall of sleeve 16 of piston 17
19, each sleeve 16 is interior to be filled with damping fluid；Wherein, substrate 15 is fixedly connected with the bridge pier of bridge, and sleeve 16 is on substrate 15
Can be set up in parallel multiple, each sleeve 16 is transported with internal piston 17 and the formation of piston rod 18 one to upper seat assembly level
Dynamic damper, and under high speed load effect, the damper of multiple sleeves 16 formation can collective effect, with more preferable effect
Really；Each sleeve 16 is provided at both ends with end cap 20, and is tightly connected, and the end cap seal of piston rod 18 and sleeve 16 coordinates.
In the present embodiment, the top of each sleeve 16 is each formed with slideway, and the bottom each chute of correspondence of upper pedestal 1 is set
There is the slide rail 21 being slidably matched；Chute is T-slot, dovetail groove or dovetail groove, and slide rail shape is adapted with chute.
In the present embodiment, piston rod 18 is the U-shaped structure being made up of the horizontal body portion of both sides vertical portion and connection vertical portion, its
Horizontal body portion is set through sleeve 16, and the bottom of the upper end of both sides vertical portion with upper pedestal 1 is fixedly connected；Piston rod 18 can be logical
Bolt connection is crossed, or is connected by being welded in upper pedestal 1.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to skill of the invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this
Among the right of invention.
Claims (5)
1. a kind of bridge vibration damping holder, it is characterised in that：Including for the upper seat assembly being connected with bridge beam body and being connected to bridge
Beam bridge pier and the lower seat assembly that damping is formed to the horizontal movement of upper seat assembly, the upper seat assembly are slidably supported
It is arranged on the lower seat assembly；
The upper seat assembly, which includes upper pedestal and at least two be arranged on upper pedestal, is used for the load up and down to bridge beam body
The vibration absorber of vibration damping, each vibration absorber of pedestal correspondence, which is set, is formed with installation cavity, each vibration absorber
Including torsion damping mechanism and for the up-down vibration of bridge beam body to be converted into rotary motion and torsion damping mechanism work is driven
The movement conversion mechanism of work, the torsion damping mechanism include with can relatively rotate and sealedly mode be arranged in installation cavity
Axle sleeve and extend the first spacer and the second spacer formed, the outside of the axle sleeve and described first into installation cavity from upper pedestal
Spacer and the second spacer, which are respectively formed, to be close to set and the installation cavity is divided into the first damping cavity and the second damping cavity, and described the
Damping fluid is filled with one damping cavity and second damping cavity；
The first arc rotor block and the second arc rotor block, the first arc rotor position have radially been symmetrically formed on the axle sleeve
In in the first damping cavity and being divided into the first working chamber and the second working chamber, and the first arc rotor block and the first damping cavity
Cavity wall between be formed with the first damp channel of the first working chamber of connection and the second working chamber, the second arc rotor block is located at
In second damping cavity and it is divided into the 3rd working chamber and the 4th working chamber, and the second arc rotor block and the second damping cavity
The second damp channel of the 3rd working chamber of connection and the 4th working chamber is formed between cavity wall.
2. bridge vibration damping holder according to claim 1, it is characterised in that：The movement conversion mechanism includes screw rod and interior
It is placed on the thread bush for forming a fixed connection and coordinating with screw flight in axle sleeve.
3. bridge vibration damping holder according to claim 1, it is characterised in that：The lower seat assembly include substrate and one into
Type is arranged to be provided with least one sleeve on substrate, each sleeve is divided into two-part piston by its internal cavities
With the piston rod that sleeve is connected with upper pedestal bottom is connected and stretched out with piston, between the circumference and sleeve lining of the piston formed
Have and damping fluid is filled with annular damper passage, each sleeve.
4. bridge vibration damping holder according to claim 3, it is characterised in that：The top of each sleeve is each formed with sliding
Road, the bottom each chute of correspondence of the upper pedestal is provided with the slide rail being slidably matched.
5. bridge vibration damping holder according to claim 3, it is characterised in that：The piston rod is by both sides vertical portion and company
The U-shaped structure of the horizontal body portion composition of vertical portion is connect, its horizontal body portion is through sleeve setting, and the upper end of both sides vertical portion is and institute
The bottom for stating upper pedestal is fixedly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710435829.8A CN107151978B (en) | 2017-06-08 | 2017-06-08 | Bridge vibration reduction support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710435829.8A CN107151978B (en) | 2017-06-08 | 2017-06-08 | Bridge vibration reduction support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107151978A true CN107151978A (en) | 2017-09-12 |
| CN107151978B CN107151978B (en) | 2023-04-28 |
Family
ID=59796532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710435829.8A Active CN107151978B (en) | 2017-06-08 | 2017-06-08 | Bridge vibration reduction support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107151978B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983960A (en) * | 2019-11-26 | 2020-04-10 | 重庆工商职业学院 | Support for track bridge |
| CN111172861A (en) * | 2020-03-04 | 2020-05-19 | 王少鹏 | High-speed bridge with bearing deformation structure |
| CN116254760A (en) * | 2023-05-06 | 2023-06-13 | 菏泽城建工程发展集团有限公司 | Cable shock attenuation spherical support with shear resistance transition steel sheet structure |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3606686A1 (en) * | 1986-02-28 | 1987-09-03 | Aros Hydraulik | VISCOSE DAMPER FOR A VIBRATION INSULATING DEVICE |
| CN2379538Y (en) * | 1999-06-23 | 2000-05-24 | 徐德修 | Sealing type liquid flow damper for buildings |
| KR100795937B1 (en) * | 2006-09-20 | 2008-01-22 | (주)엠피기술산업 | Bearing apparatus for structure |
| EP2175159A2 (en) * | 2008-10-08 | 2010-04-14 | Zf Friedrichshafen Ag | Torsional vibration damper |
| CN102937158A (en) * | 2012-11-12 | 2013-02-20 | 富奥汽车零部件股份有限公司 | Magneto-rheological fluid damper for automobile |
| CN202883876U (en) * | 2012-10-31 | 2013-04-17 | 江苏大学 | Integrated absorber device |
| CN103806369A (en) * | 2014-01-07 | 2014-05-21 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Connection method of viscous damper for achieving earthquake resistance of long-span bridge |
| CN204781413U (en) * | 2015-07-10 | 2015-11-18 | 同济大学 | Viscid quality damping device establishes ties |
| CN105544566A (en) * | 2016-01-25 | 2016-05-04 | 重庆工商职业学院 | Buffer damping anchor stock |
| CN105780640A (en) * | 2015-12-04 | 2016-07-20 | 东南大学 | Resettable shape memory alloy (SMA) multidimensional vibration isolating support |
| CN205533982U (en) * | 2016-03-24 | 2016-08-31 | 同济大学 | Novel mix damping device |
| CN106337362A (en) * | 2016-10-09 | 2017-01-18 | 重庆交通大学 | Vibration isolator for bridge |
| CN106381941A (en) * | 2016-11-09 | 2017-02-08 | 河南理工大学 | Shape memory alloy spring vibration absorber containing collision damping energy-dissipating device |
| CN106638288A (en) * | 2017-02-15 | 2017-05-10 | 中铁二院工程集团有限责任公司 | Energy-dissipation and seismic-mitigation bridge support |
| CN206768583U (en) * | 2017-06-08 | 2017-12-19 | 重庆工商职业学院 | Bridge damping supporting seat |
-
2017
- 2017-06-08 CN CN201710435829.8A patent/CN107151978B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3606686A1 (en) * | 1986-02-28 | 1987-09-03 | Aros Hydraulik | VISCOSE DAMPER FOR A VIBRATION INSULATING DEVICE |
| CN2379538Y (en) * | 1999-06-23 | 2000-05-24 | 徐德修 | Sealing type liquid flow damper for buildings |
| KR100795937B1 (en) * | 2006-09-20 | 2008-01-22 | (주)엠피기술산업 | Bearing apparatus for structure |
| EP2175159A2 (en) * | 2008-10-08 | 2010-04-14 | Zf Friedrichshafen Ag | Torsional vibration damper |
| CN202883876U (en) * | 2012-10-31 | 2013-04-17 | 江苏大学 | Integrated absorber device |
| CN102937158A (en) * | 2012-11-12 | 2013-02-20 | 富奥汽车零部件股份有限公司 | Magneto-rheological fluid damper for automobile |
| CN103806369A (en) * | 2014-01-07 | 2014-05-21 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Connection method of viscous damper for achieving earthquake resistance of long-span bridge |
| CN204781413U (en) * | 2015-07-10 | 2015-11-18 | 同济大学 | Viscid quality damping device establishes ties |
| CN105780640A (en) * | 2015-12-04 | 2016-07-20 | 东南大学 | Resettable shape memory alloy (SMA) multidimensional vibration isolating support |
| CN105544566A (en) * | 2016-01-25 | 2016-05-04 | 重庆工商职业学院 | Buffer damping anchor stock |
| CN205533982U (en) * | 2016-03-24 | 2016-08-31 | 同济大学 | Novel mix damping device |
| CN106337362A (en) * | 2016-10-09 | 2017-01-18 | 重庆交通大学 | Vibration isolator for bridge |
| CN106381941A (en) * | 2016-11-09 | 2017-02-08 | 河南理工大学 | Shape memory alloy spring vibration absorber containing collision damping energy-dissipating device |
| CN106638288A (en) * | 2017-02-15 | 2017-05-10 | 中铁二院工程集团有限责任公司 | Energy-dissipation and seismic-mitigation bridge support |
| CN206768583U (en) * | 2017-06-08 | 2017-12-19 | 重庆工商职业学院 | Bridge damping supporting seat |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983960A (en) * | 2019-11-26 | 2020-04-10 | 重庆工商职业学院 | Support for track bridge |
| CN110983960B (en) * | 2019-11-26 | 2021-06-22 | 重庆工商职业学院 | Support for track bridge |
| CN111172861A (en) * | 2020-03-04 | 2020-05-19 | 王少鹏 | High-speed bridge with bearing deformation structure |
| CN116254760A (en) * | 2023-05-06 | 2023-06-13 | 菏泽城建工程发展集团有限公司 | Cable shock attenuation spherical support with shear resistance transition steel sheet structure |
| CN116254760B (en) * | 2023-05-06 | 2023-10-31 | 菏泽城建工程发展集团有限公司 | Cable shock attenuation spherical support with shear resistance transition steel sheet structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107151978B (en) | 2023-04-28 |
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Effective date of registration: 20231016 Address after: 610000 room 1114, floor 11, unit 1, building 1, No. 27, Shuncheng Street, Jinjiang District, Chengdu, Sichuan Patentee after: Sichuan Qinyao Weiyue Construction Engineering Co.,Ltd. Address before: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee before: Dragon totem Technology (Hefei) Co.,Ltd. Effective date of registration: 20231016 Address after: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Dragon totem Technology (Hefei) Co.,Ltd. Address before: 1 No. 400052 Kowloon Jiulongpo District of Chongqing science and Technology Park, Hualong Avenue Patentee before: CHONGQING TECHNOLOGY AND BUSINESS INSTITUTE |
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