CN103806369A - Connection method of viscous damper for achieving earthquake resistance of long-span bridge - Google Patents
Connection method of viscous damper for achieving earthquake resistance of long-span bridge Download PDFInfo
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- CN103806369A CN103806369A CN201410004794.9A CN201410004794A CN103806369A CN 103806369 A CN103806369 A CN 103806369A CN 201410004794 A CN201410004794 A CN 201410004794A CN 103806369 A CN103806369 A CN 103806369A
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Abstract
The invention discloses a connection method of a viscous damper for achieving earthquake resistance of a long-span bridge and relates to the technical field of earthquake resistance of engineering structures. The viscous damper, a left installation plate, a right installation plate and a liftable pedestal are included. The connection method includes the steps that the left installation plate is arranged at a corresponding position of a girder through embedded parts, the right installation plate is arranged at a corresponding position of the girder through embedded parts, and the liftable pedestal is arranged at a corresponding position of a tower pier column through embedded parts; the viscous damper is fixedly connected with the liftable pedestal through hoops, and the height of the liftable pedestal is adjusted so that the viscous damper can be driven by the liftable pedestal to ascend or descend to be adjusted to a connection position; one end of a piston rod is connected with the left installation plate through a left hinged support, and the other end of the piston rod is connected with the right installation plate through a right hinged support. According to the connection method, installation is easy, installation cost is low, the problem that a sealing element is unilaterally stressed is solved, the service life of the viscous damper is prolonged, installation dimensions are small, and earthquake resistance is good.
Description
Technical field
The present invention relates to engineering structures anti-seismic technology field, be specifically related to a kind of connected mode of the viscous damper for Longspan Bridge antidetonation.
Background technology
Along with the frequent outburst of the natural calamities such as earthquake, bridge earthquake resistance take precautions against natural calamities device enjoy industry pay close attention to, the existing device for bridge earthquake resistance has polytype, as metal damper, frcition damper, viscous damper, viscoelastic damper etc.Viscous damper is a kind of velocity-dependent damping unit, has the advantages such as damping effect is high, static(al) rigidity is little, energy dissipation capacity is strong, and viscous damper is widely used in Longspan Bridge.
Present stage, the span of bridge constantly increased, and in order to guarantee that Longspan Bridge has enough shock resistances, the stroke, tonnage and the weight that are arranged on the viscous damper on bridge are also increasing.
Existing viscous damper comprises piston rod, guard shield, left end cap, left seal, cylinder barrel, piston, right end cap and right seal.Take certain Longspan Bridge antidetonation viscous damper as example, the length of existing piston rod is generally 2700mm, and the stroke of piston rod is 500mm, and the installation length of damper is not less than 3300mm.
Existing mounting method is: (1) is connected by left ball twisted seat the guard shield of viscous damper with girder, and the right-hand member of viscous damper piston rod is connected with pier king-post by right ball twisted seat; (2) be provided for slinging on the pier king-post suspension hook of damper outer cylinder sheath, one end of hoist cable is connected with suspension hook, and the other end is walked around pulley mechanism and is connected with counterweight.
Existing viscous damper is installed on after bridge, when having extraneous load as wind carries, when vehicle-mounted or seismic force effects, girder and pier king-post produce horizontal relative displacement, now, the piston rod being connected with pier king-post slides, drive the piston being fixedly connected with piston rod to slide in cylinder barrel, the resisting medium relative motion in cylinder barrel produces damping force, plays power consumption effect.
, there is in use following defect in the viscous damper that adopts existing mounting method to install:
(1) damper installation dimension is larger, the easy unstability of damper axial compression, and damper is easily impaired, and there is one-sided pressurized phenomenon in seal, and seal is easily impaired.
(2) on pier king-post, be provided for suspension hook, pulley mechanism and the counterweight of slinging damper outer cylinder sheath, need to the in the situation that of work high above the ground, preset mounting points, installation difficulty is larger, and meanwhile, arranging of pulley mechanism and counterweight increased construction cost.
(3) piston rod is connected with the girder of bridge, right sleeve is connected with the pier king-post of bridge, in the time of girder and pier king-post generation vertical displacement, viscous damper is subject to the constraint of this partial dislocation will make viscous damper in disadvantageous stress, even damages viscous damper.
Summary of the invention
For the defect existing in prior art, the object of the present invention is to provide a kind of connected mode of the viscous damper for Longspan Bridge antidetonation, installation dimension is less, there is not one-sided pressurized in seal, in the application life that extends viscous damper, the installation difficulty of viscous damper is lower, and installation cost is lower, more stable after installation, anti seismic efficiency is better.
For reaching above object, the technical scheme that the present invention takes is: a kind of method of attachment of the viscous damper for Longspan Bridge antidetonation, comprises viscous damper, left installing plate, right installing plate; Described viscous damper comprises piston rod, piston and cylinder barrel, and piston is arranged at the inside of cylinder barrel, and the both sides that cylinder barrel is relative are respectively arranged with left end cap and right end cap, and described piston rod is through left end cap, piston and right end cap; Between described piston rod and left end cap, be provided with left seal, between piston rod and right end cap, be provided with right seal; It is characterized in that: one end of described piston rod is connected with left installing plate by a left twisted seat, the other end is by a right twisted seat and right installing plate, and described left twisted seat is connected by bearing pin with left installing plate, and described right twisted seat is connected by bearing pin with right installing plate; Also comprise liftable pedestal.
Described method of attachment comprises the following steps:
A, left installing plate is defaulted in to the first pre-buried point of bridge by built-in fitting, right installing plate is arranged at the second pre-buried point of bridge by built-in fitting, and liftable pedestal is arranged at the 3rd pre-buried point of bridge by built-in fitting.
B, viscous damper is fixedly connected with liftable pedestal by anchor ear;
The height of C, adjusting liftable pedestal, liftable pedestal drives viscous damper lifting, adjusts viscous damper to installation site.
D, one end of piston rod is connected with left installing plate by left twisted seat, the other end passes through right twisted seat and is connected with right installing plate.
On the basis of technique scheme, the first pre-buried point described in steps A and the second pre-buried point are all positioned at the girder of bridge, and the 3rd pre-buried point is positioned at the pier king-post of bridge; Left installing plate and right installing plate all default in the girder of bridge, and liftable pedestal defaults in the pier king-post of bridge.
On the basis of technique scheme, the first pre-buried point described in steps A and the second pre-buried point are all positioned at the pier king-post of bridge, and the 3rd pre-buried point is positioned at the girder of bridge; Left installing plate and right installing plate all default in the pier king-post of bridge, and liftable pedestal defaults in the girder of bridge.
On the basis of technique scheme, installation site described in step C is viscous damper and the part that is connected of left installing plate, right installing plate.
On the basis of technique scheme, further comprising the steps of after step D: fine setting liftable pedestal, the motion of band moveable cylinder, treats that the longitudinal centre line of cylinder barrel and the longitudinal centre line of piston rod overlap, and stop adjusting liftable pedestal.
On the basis of technique scheme, described left installing plate is connected part with left twisted seat and has the first connecting hole, and described right installing plate is connected part with right twisted seat and has the second connecting hole, and described the first connecting hole and the second connecting hole are longitudinal slotted hole.
Compared with prior art, the invention has the advantages that:
(1) the left installing plate in the present invention is fixed on girder, and right installing plate is fixed on girder, and one end of viscous damper is connected with left installing plate, and the other end is connected with right installing plate, and cylinder body is fixedly connected with the liftable pedestal being oppositely arranged.In the time there is relative displacement between girder and tower pier stud, viscous damper is in running order, piston rod is relative with tower pier stud static, by the motion that horizontally slips of liftable pedestal band moveable cylinder, piston slides in cylinder barrel, resisting medium relative motion in cylinder barrel produces damping force, realizes the motion power consumption of damper.Be arranged at girder with one end of piston rod in prior art, the other end is arranged at pier king-post, and the mode that drives piston movement to realize power consumption by piston rod is compared.The piston rod of viscous damper does not produce displacement, has reduced the use of sleeve, has effectively alleviated the pressure that left sealing mat is subject to, and has extended the application life of viscous damper; The installation dimension that has reduced viscous damper, has reduced cost, and the viscous damper after installation is better stable.
(2) the piston rod one end in the present invention is connected with left installing plate, the other end is connected with right installing plate, and cylinder barrel is connected with liftable pedestal, makes seal not have one-sided pressurized, extend the application life of viscous damper, in prior art, piston rod is connected with left ball twisted seat, right sleeve is connected with right ball twisted seat, cylinder barrel is connected with suspension hook, and pulley mechanism is set compares with counterweight, mounting method is fairly simple, and installation cost is lower.
(3) part corresponding to piston rod of the left installing plate in the present invention has the first connecting hole, right installing plate part corresponding to piston rod has the second connecting hole, the first connecting hole and the second connecting hole are longitudinal slotted hole, in the time that girder and pier king-post have vertical relative displacement, piston rod can be movable in the first connecting hole and the second connecting hole, make viscous damper not be subject to this partial dislocation constraint to produce extra additional force, viscous damper is not easily damaged.
Accompanying drawing explanation
Fig. 1 is the structural representation for the connected mode of the viscous damper of Longspan Bridge antidetonation when left installing plate is arranged at girder in the embodiment of the present invention;
Fig. 2 is the structural representation for the viscous damper of Longspan Bridge antidetonation in the embodiment of the present invention;
Fig. 3 is the partial structurtes schematic diagram of Fig. 1;
Fig. 4 is the structural representation for the connected mode of the viscous damper of Longspan Bridge antidetonation when left installing plate is arranged at pier king-post in the embodiment of the present invention;
Fig. 5 is the structural representation of left installing plate and right installing plate in the embodiment of the present invention.
In figure: 1-piston rod, 2-viscous damper, 3-liftable pedestal, 4-cylinder barrel, 5-girder, the left installing plate of 6-, the right installing plate of 7-, 8-pier king-post, the left seal of 9-, 10-left end cap, 11-piston, the right seal of 12-, 13-right end cap, the left twisted seat of 14-, the right twisted seat of 15-, 16-the first connecting hole, 17-the second connecting hole.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the connected mode of the viscous damper for Longspan Bridge antidetonation that the embodiment of the present invention provides, comprises viscous damper 2, left installing plate 6, right installing plate 7 and liftable pedestal 3.Viscous damper 2 comprises that piston rod 1, inside are provided with the cylinder barrel 4 of piston 11, one end of piston rod 1 is provided with left twisted seat 14, the other end is provided with right twisted seat 15, the relative both sides of cylinder barrel 4 are respectively arranged with left end cap 10 and right end cap 13, and piston rod 1 is through left end cap 10, piston 11 and right end cap 13.Between piston rod 1 and left end cap 10, be provided with left seal 9, between piston rod 1 and right end cap 13, be provided with right seal 12.Cylinder barrel 4 is connected with liftable pedestal 3 by anchor ear.
Left installing plate 6 has the first connecting hole 16 being connected with piston rod 1, and right installing plate 7 has the second connecting hole 17 being connected with piston rod 1.One end of piston rod 1 is connected with left installing plate 6 by a left twisted seat 14, and the other end is connected with right installing plate 7 by a right twisted seat 15; Left installing plate 6 is connected with left twisted seat 14 by bearing pin, and right installing plate 7 is connected with right twisted seat 15 by bearing pin.Spacing between left installing plate 6 and right installing plate 7 and piston rod 1 equal in length.
Left twisted seat 14 has the first installing hole with the corresponding part of the first connecting hole 16, right twisted seat 15 has the second installing hole with the corresponding part of the second connecting hole 17, distance between the center of the first installing hole and piston rod 1 center, left side is 75mm, and the distance between the center of the second installing hole and piston rod 1 center, right side is 75mm.
Shown in Figure 5, the first connecting hole 16 is longitudinal slotted hole, and the second connecting hole 17 is longitudinal slotted hole.
In the embodiment of the present invention, for the viscous damper of Longspan Bridge antidetonation, the length of left end cap 10 is 150mm, and the length of right end cap 13 is 150mm, and the length of piston 11 is 400mm, and the length of piston rod 1 is 2700mm.
In the embodiment of the present invention, left installing plate 6, right installing plate 7 all adopt otic placode to make.
The method of attachment of the viscous damper for Longspan Bridge antidetonation of the embodiment of the present invention, comprises the following steps:
S1: left installing plate 6 is defaulted in to the first pre-buried point of bridge by built-in fitting, right installing plate 7 defaults in the second pre-buried point of bridge by built-in fitting, and liftable pedestal 3 defaults in the 3rd pre-buried point of bridge by built-in fitting.
If the first pre-buried point is positioned at the girder 5 of bridge, the pre-buried point of girder 5, the three that the second pre-buried point is positioned at bridge is positioned at the pier king-post 8 of bridge, and left installing plate 6 defaults in the girder 5 of bridge, right installing plate 7 defaults in the girder 5 of bridge, and liftable pedestal 3 defaults in the pier king-post 8 of bridge.
If the first pre-buried point is positioned at the pier king-post 8 of bridge, the pre-buried point of pier king-post 8, the three that the second pre-buried point is positioned at bridge is positioned at the girder 5 of bridge; Left installing plate 6 defaults in the pier king-post 8 of bridge, and right installing plate 7 defaults in the pier king-post 8 of bridge, and liftable pedestal 3 defaults in the girder 5 of bridge.
S2: viscous damper 2 is fixedly connected with liftable pedestal 3 by anchor ear 14.
S3: adjust the height of liftable pedestal 3, liftable pedestal 3 drives viscous damper 2 liftings, adjusts viscous damper 2 to installation site.Installation site is viscous damper 2 and the part that is connected of left installing plate 6, right installing plate 7.
S4: one end of piston rod 1 is connected with left installing plate 6 by left twisted seat 14, and the other end is connected with right installing plate 7 by right twisted seat 15.
S5: fine setting liftable pedestal 3, band moveable cylinder 4 moves, and treats that the longitudinal centre line of cylinder barrel 4 overlaps with the longitudinal centre line of piston rod 1, stops adjusting liftable pedestal 3.
The installation length of viscous damper equates to the distance at the second installing hole center with the first installing hole center, when the length of piston rod 1 is 2700mm, distance between the center of the first installing hole and piston rod 1 center, left side is 75mm, when distance between the center of the second installing hole and piston rod 1 center, right side is 75mm, the installation length of viscous damper is 2850mm.
Operating principle of the present invention is as follows:
Fine setting liftable pedestal 3 height, band moveable cylinder 4 and piston rod 10, make the central axis of piston rod 1 through the first connecting hole 16 and the second connecting hole 17 center.Now, the weight of cylinder barrel 4 is born by liftable pedestal 3, the weight of piston rod 1 and piston 11 is passed to left installing plate 9 and right installing plate 10 by bearing pin, piston rod 1 can be to left seal 9 or right seal 12 build-ups of pressure, there is not one-sided pressurized problem in left seal 9 and right seal 12, left seal 9 and right seal 12 can use for a long time, have improved the service behaviour of viscous damper 1, have extended the application life of viscous damper 1.
The weight of cylinder barrel 4 is born by liftable pedestal 3, and the weight of piston rod 1 and piston 11 is passed to left installing plate 6 by bearing pin, on right installing plate 7.In the time there is relative displacement between girder 5 and tower pier stud, viscous damper 2 is in running order, piston rod 1 is relative with tower pier stud static, be with moveable cylinder 4 to slide along piston rod 1 by liftable pedestal 3, piston 11 is in the interior slip of cylinder barrel 4, resisting medium relative motion in cylinder barrel 4 produces damping force, realizes the motion power consumption of viscous damper.
The first connecting hole 16 and the second connecting hole 17 are longitudinal slotted hole, in the time that girder 5 and pier king-post 8 produce vertical relative displacement, piston rod 1 can be movable in the first connecting hole 16 and the second connecting hole 17, make viscous damper 2 not be subject to this partial dislocation constraint to produce extra additional force, viscous damper is not easily damaged.
The present invention is not limited to above-mentioned embodiment, for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, within these improvements and modifications are also considered as protection scope of the present invention.The content not being described in detail in this manual belongs to the known prior art of professional and technical personnel in the field.
Claims (6)
1. for a method of attachment for the viscous damper of Longspan Bridge antidetonation, comprise viscous damper (2), left installing plate (6), right installing plate (7); Described viscous damper (2) comprises piston rod (1), piston (11) and cylinder barrel (4), piston (11) is arranged at the inside of cylinder barrel (4), the relative both sides of cylinder barrel (4) are respectively arranged with left end cap (10) and right end cap (13), and described piston rod (1) is through left end cap (10), piston (11) and right end cap (13); Between described piston rod (1) and left end cap (10), be provided with left seal (9), between piston rod (1) and right end cap (13), be provided with right seal (12); It is characterized in that: one end of described piston rod (1) is connected with left installing plate (6) by a left twisted seat (14), the other end is by a right twisted seat (15) and right installing plate (7), described left twisted seat (14) is connected by bearing pin with left installing plate (6), and described right twisted seat (15) is connected by bearing pin with right installing plate (7); Also comprise liftable pedestal (3);
Described method of attachment comprises the following steps:
A, left installing plate (6) is defaulted in to the first pre-buried point of bridge by built-in fitting, right installing plate (7) is arranged at the second pre-buried point of bridge by built-in fitting, and liftable pedestal (3) is arranged at the 3rd pre-buried point of bridge by built-in fitting;
B, viscous damper (2) is fixedly connected with liftable pedestal (3) by anchor ear;
The height of C, adjusting liftable pedestal (3), liftable pedestal (3) drives viscous damper (2) lifting, adjusts viscous damper (2) to link position;
D, one end of piston rod (1) is connected with left installing plate (6) by left twisted seat (14), the other end passes through right twisted seat (15) and is connected with right installing plate (7).
2. the method for attachment of the viscous damper for Longspan Bridge antidetonation as claimed in claim 1, it is characterized in that: the first pre-buried point described in steps A and the second pre-buried point are all positioned at the girder (5) of bridge, and the 3rd pre-buried point is positioned at the pier king-post (8) of bridge; Left installing plate (6) and right installing plate (7) all default in the girder (5) of bridge, and liftable pedestal (3) defaults in the pier king-post (8) of bridge.
3. the method for attachment of the viscous damper for Longspan Bridge antidetonation as claimed in claim 1, it is characterized in that: the first pre-buried point described in steps A and the second pre-buried point are all positioned at the pier king-post (8) of bridge, and the 3rd pre-buried point is positioned at the girder (5) of bridge; Left installing plate (6) and right installing plate (7) all default in the pier king-post (8) of bridge, and liftable pedestal (3) defaults in the girder (5) of bridge.
4. the method for attachment of the viscous damper for Longspan Bridge antidetonation as claimed in claim 1, is characterized in that: installation site described in step C is viscous damper (2) and the part that is connected of left installing plate (6), right installing plate (7).
5. the method for attachment of the viscous damper for Longspan Bridge antidetonation as claimed in claim 1, it is characterized in that: further comprising the steps of after step D: fine setting liftable pedestal (3), band moveable cylinder (4) motion, the longitudinal centre line for the treatment of cylinder barrel (4) overlaps with the longitudinal centre line of piston rod (1), stops adjusting liftable pedestal (3).
6. the method for attachment of the viscous damper for Longspan Bridge antidetonation as claimed in claim 1, it is characterized in that: described left installing plate (6) is connected part with left twisted seat (14) and has the first connecting hole (16), described right installing plate (7) is connected part with right twisted seat (15) and has the second connecting hole (17), and described the first connecting hole (16) and the second connecting hole (17) are longitudinal slotted hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410004794.9A CN103806369B (en) | 2014-01-07 | 2014-01-07 | For the connected mode of the viscous damper of Longspan Bridge antidetonation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410004794.9A CN103806369B (en) | 2014-01-07 | 2014-01-07 | For the connected mode of the viscous damper of Longspan Bridge antidetonation |
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| CN103806369A true CN103806369A (en) | 2014-05-21 |
| CN103806369B CN103806369B (en) | 2015-09-16 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104233951A (en) * | 2014-07-24 | 2014-12-24 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Multifunctional viscous damper and connecting method of multifunctional viscous damper |
| CN106192723A (en) * | 2016-07-01 | 2016-12-07 | 中铁大桥勘测设计院集团有限公司 | A kind of rigidity and viscosity combination restraining structure and method |
| CN106894331A (en) * | 2017-04-25 | 2017-06-27 | 沈阳建筑大学 | A kind of spacing bearing of the power consumption for carrying Viscous fluid damper |
| CN107151978A (en) * | 2017-06-08 | 2017-09-12 | 重庆工商职业学院 | Bridge vibration damping holder |
| CN107447645A (en) * | 2017-08-08 | 2017-12-08 | 北京工业大学 | A kind of lock up damping devices based on winding rope amplification mechanism |
| CN113089459A (en) * | 2021-03-04 | 2021-07-09 | 浙江理工大学 | Combined bridge supporting device with shock absorption and toppling prevention functions |
| CN115948976A (en) * | 2022-12-19 | 2023-04-11 | 中交公路规划设计院有限公司 | Longitudinal combination toughness constraint system and method for large-span suspension bridge |
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| US5349712A (en) * | 1991-11-07 | 1994-09-27 | Public Works Research Institute, Ministry Of Construction | Variable damper for bridges and bridge |
| KR20120006609A (en) * | 2010-07-13 | 2012-01-19 | 대림산업 주식회사 | Composite damper of viscos damper and slit damper |
| CN103321144A (en) * | 2013-07-05 | 2013-09-25 | 成都市新筑路桥机械股份有限公司 | Linkage device for bridges |
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| US5349712A (en) * | 1991-11-07 | 1994-09-27 | Public Works Research Institute, Ministry Of Construction | Variable damper for bridges and bridge |
| KR20120006609A (en) * | 2010-07-13 | 2012-01-19 | 대림산업 주식회사 | Composite damper of viscos damper and slit damper |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104233951A (en) * | 2014-07-24 | 2014-12-24 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Multifunctional viscous damper and connecting method of multifunctional viscous damper |
| CN104233951B (en) * | 2014-07-24 | 2016-03-23 | 中铁大桥科学研究院有限公司 | A kind of multi-functional viscous damper and attaching method thereof |
| CN106192723A (en) * | 2016-07-01 | 2016-12-07 | 中铁大桥勘测设计院集团有限公司 | A kind of rigidity and viscosity combination restraining structure and method |
| CN106894331A (en) * | 2017-04-25 | 2017-06-27 | 沈阳建筑大学 | A kind of spacing bearing of the power consumption for carrying Viscous fluid damper |
| CN107151978A (en) * | 2017-06-08 | 2017-09-12 | 重庆工商职业学院 | Bridge vibration damping holder |
| CN107151978B (en) * | 2017-06-08 | 2023-04-28 | 重庆工商职业学院 | Bridge vibration reduction support |
| CN107447645A (en) * | 2017-08-08 | 2017-12-08 | 北京工业大学 | A kind of lock up damping devices based on winding rope amplification mechanism |
| CN113089459A (en) * | 2021-03-04 | 2021-07-09 | 浙江理工大学 | Combined bridge supporting device with shock absorption and toppling prevention functions |
| CN115948976A (en) * | 2022-12-19 | 2023-04-11 | 中交公路规划设计院有限公司 | Longitudinal combination toughness constraint system and method for large-span suspension bridge |
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Address after: 103 No. 430000 Hubei Province in Qiaokou District of Wuhan city road construction Patentee after: BRIDGE SCIENCE AND TECHNOLOGY INSTITUTE CO., LTD., CHINA RAILWAY ENGINEERING GROUP Patentee after: Group Co., Ltd., Zhongtie Daqiao Bureau Address before: 430000 No. 103, Jianshe Avenue, Wuhan, Hubei Patentee before: China Zhongtie Major Bridge Engineering Group Co., Ltd. Patentee before: Group Co., Ltd., Zhongtie Daqiao Bureau |
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| TR01 | Transfer of patent right |
Effective date of registration: 20200619 Address after: 430000 No.29 Hanxi Road, Qiaokou District, Wuhan City, Hubei Province Co-patentee after: China Zhongtie Major Bridge Engineering Group Co.,Ltd. Patentee after: China Railway Qiaoyan Technology Co., Ltd Co-patentee after: CHINA RAILWAY BRIDGE SCIENCE RESEARCH INSTITUTE, Ltd. Address before: No. 103 430000 Qiaokou District in Hubei province Wuhan city road construction Co-patentee before: China Zhongtie Major Bridge Engineering Group Co.,Ltd. Patentee before: CHINA RAILWAY BRIDGE SCIENCE RESEARCH INSTITUTE, Ltd. |