CN113089387B - Integral damping device for rail transit - Google Patents
Integral damping device for rail transit Download PDFInfo
- Publication number
- CN113089387B CN113089387B CN202110353500.3A CN202110353500A CN113089387B CN 113089387 B CN113089387 B CN 113089387B CN 202110353500 A CN202110353500 A CN 202110353500A CN 113089387 B CN113089387 B CN 113089387B
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- sleeve
- plate
- base
- liquid storage
- storage shell
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
- E01B19/003—Means for reducing the development or propagation of noise
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
- E01B9/685—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
- E01B9/685—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape
- E01B9/688—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape with internal cavities
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention provides an integral damping device for rail transit, which relates to the technical field of rail transit and comprises a sealing top plate and a liquid return plate; the left end of the top of the base is provided with a sleeve, the sleeve is of a hollow structure, the top side of the sleeve is provided with a sealing top plate, and the damping spring is positioned inside the sleeve; the right end of the top of the base is provided with a liquid storage shell, the liquid storage shell is of a hollow structure, and a liquid return spring is positioned inside the liquid storage shell; the pressing plate is attached to the inner wall of the sleeve; a guide sliding hole is formed in the sealing top plate, the shock absorption moving part is connected with the sealing top plate, and the shock absorption moving part is located at the top of the sealing top plate; the top of the telescopic rubber tube is connected to the outer side of the shock-absorbing moving part, and the bottom of the telescopic rubber tube is connected to the outer side of the sleeve; when the pressing plate moves downwards in the sleeve, oil in the sleeve is pressed into the liquid storage shell through the flow guide pipe under the influence of the thrust of the pressing plate, and the oil in the sleeve is influenced by the discharge flow velocity, so that the auxiliary supporting effect on the pressing plate is achieved.
Description
Technical Field
The invention belongs to the technical field of rail transit, and particularly relates to an integral shock absorption device for rail transit.
Background
The rail transit is an important component of an urban traffic network, the urban rail transit shuttles through urban areas and other urban dwellings, the steel rails are used for guiding wheels of vehicles to advance and bearing the pressure of the wheels, and the upper pressure is transmitted downwards to sleepers and track beds through fasteners so as to provide the required bearing requirements for the vehicles, the steel rails mainly bear the force from top to bottom, the steel rails are not suitable for bearing obvious force from bottom to top, and vibration isolation and vibration reduction are always the core problems of the urban rail transit and buildings.
The integral shock-absorbing device for rail transit can refer to patent No. CN112360917A, and mainly comprises a friction spring, a supporting mechanism and a cover plate, wherein the supporting mechanism and the friction spring are fixedly installed and then integrally installed below a mounting hole of a rail facility, the rail facility is supported by a supporting part, the supporting mechanism is provided with a plurality of supporting parts, the appearance of the cover plate and the supporting mechanism is matched with the mounting hole of the rail facility, and the cover plate is installed in the mounting hole of the rail facility to cover the mounting hole. The damping device for rail transit has a simple structure, dissipates vibration or impact energy into heat energy through high-efficiency damping and energy dissipation of the friction spring, combines the advantages of the spring and the damper, and has the advantages of being free of maintenance, insensitive to environment, various in installation mode and the like.
When using, the damping device for the existing similar rail transit is usually adopted for a spring to directly carry out single buffering support on a rail, the effect is poor, when the device falls for buffering, the spring is difficult to return quickly, the damping and protecting effect of the rail is easily influenced, the difficulty in dismounting is large, and the difficulty in dismounting and mounting of each part in the later period is easily caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides an integral damping device for rail transit, which aims to solve the problems that when the conventional damping device for similar rail transit is used, a spring is usually adopted to directly carry out single buffering support on a rail, the effect is poor, when the device falls down for buffering, the device is difficult to return quickly, the damping and protecting effect of the rail is easily influenced, the dismounting difficulty is high, and the problems of difficulty in dismounting and maintenance of later-stage parts are easily caused.
The invention relates to an integral shock-absorbing device for rail transit, which has the purpose and the effect achieved by the following specific technical means:
an integral shock absorption device for rail transit comprises a base, a pressure plate, a sealing top plate, a telescopic rubber tube and a liquid return plate; the left end of the top of the base is provided with a sleeve, the sleeve is of a hollow structure, the top side of the sleeve is provided with a sealing top plate, and the damping spring is positioned in the sleeve; the right end of the top of the base is provided with a liquid storage shell, the liquid storage shell is of a hollow structure, and the liquid return spring is positioned inside the liquid storage shell; the pressing plate is attached to the inner wall of the sleeve; a guide sliding hole is formed in the sealing top plate, the shock absorption moving part is connected with the sealing top plate, and the shock absorption moving part is located at the top of the sealing top plate; the top of the telescopic rubber tube is connected to the outer side of the shock absorption moving part, the bottom of the telescopic rubber tube is connected to the outer side of the sleeve, and the telescopic rubber tube is located on the outer side of the return spring; the liquid return plate is attached to the inner wall of the liquid storage shell.
Further, damping spring installs inside the sleeve, and the pressfitting of damping spring bottom is in base left end top side, and clamp plate slidable mounting is inside the sleeve, and the clamp plate pressfitting is on the damping spring top, and shock attenuation moving part bottom and clamp plate fixed connection, shock attenuation moving part bottom sliding connection are in sealed roof inside direction slide.
Furthermore, a flow guide pipe is arranged in the top of the base, pipe openings at two ends of the flow guide pipe are respectively positioned on the top sides of the left end and the right end of the base, a pipe opening at the left end of the flow guide pipe is communicated with the bottom of the sleeve, a pipe opening at the right end of the flow guide pipe is communicated with the bottom of the liquid storage shell, and the ratio of the cross section area of the flow guide pipe to the cross section area of the sleeve is 1: 10.
Furthermore, the liquid return plate is connected to the inside of the liquid storage shell in a sliding mode, the liquid return spring is installed inside the liquid storage shell, and the bottom of the liquid return spring is pressed on the top side of the liquid return plate.
Furthermore, the bottom of the shock absorption moving part is sleeved with a return spring, the shock absorption moving part is pressed on the top end of the return spring, and the bottom end of the return spring is pressed on the top side of the sealing top plate.
Further, rubber seal is installed respectively to both ends top side about the base, and base left end rubber seal pastes with the sleeve inner wall mutually, and base right-hand member rubber seal pastes with the stock solution shell inner wall mutually, and rubber seal is installed to the clamp plate periphery, and the peripheral rubber seal of clamp plate slides with the sleeve inner wall and laminates, returns the liquid board periphery and installs rubber seal, returns the peripheral rubber seal of liquid board and slides with the stock solution shell inner wall and laminates.
Further, base left end top passes through bolt fixed connection in the sleeve bottom, and base right-hand member top passes through bolt fixed connection in the liquid storage shell bottom, and sealed roof passes through bolt fixed connection in the sleeve top, and the clamp plate passes through bolt fixed connection in shock attenuation moving part bottom.
Compared with the prior art, the invention has the following beneficial effects:
1. due to the arrangement of the flow guide pipe in the base, when the pressing plate moves downwards in the sleeve, oil in the sleeve is pressed into the liquid storage shell through the flow guide pipe under the influence of the thrust of the pressing plate, and the oil in the sleeve is influenced by the flow velocity of the discharged oil, so that the auxiliary supporting effect on the pressing plate is achieved; and cooperate the setting of returning the liquid board and returning the liquid spring, be favorable to when inside fluid entering stock solution shell of sleeve, fluid drives the inside ascending lifting of returning the liquid board of liquid storage shell, returns the liquid board and receives the thrust influence of returning the liquid spring, with the inside fluid of stock solution shell in the honeycomb duct backward flow to the sleeve, guarantee the inside fluid sufficiency of liquid storage shell.
2. The return spring is arranged, so that the shock absorption moving part is driven to move upwards through the return spring, the shock absorption moving part can return quickly, and the rapidness of return of the shock absorption moving part is guaranteed; and the setting of cooperation rubber seal is favorable to sealing base and the clamp plate that the sleeve is connected through rubber seal to seal base and the liquid return plate that the liquid storage shell is connected, avoid fluid to flow out in sleeve and liquid storage shell joint gap, influence fluid to clamp plate auxiliary stay effect.
Drawings
Fig. 1 is a schematic view of an axial view connection structure of the present invention.
FIG. 2 is a schematic view of the base, sleeve and reservoir housing of the present invention in a disassembled configuration.
Fig. 3 is a schematic cross-sectional structure of the base of the present invention.
Fig. 4 is a cross-sectional structural schematic view of the sleeve of the present invention.
FIG. 5 is a schematic cross-sectional view of a cartridge of the present invention.
Fig. 6 is a schematic view of the disassembled structure of the sleeve and the shock-absorbing movable member of the present invention.
FIG. 7 is a schematic view of a disassembled structure of the liquid storage shell and the liquid return plate of the present invention.
In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:
1. a base; 101. a flow guide pipe; 2. a sleeve; 3. pressing a plate; 4. a damping spring; 5. sealing the top plate; 501. a guide slide hole; 6. a return spring; 7. a shock-absorbing moving part; 8. a bolt; 9. a telescopic rubber tube; 10. a liquid storage shell; 11. a liquid return plate; 12. a liquid return spring; 13. a rubber sealing ring.
Detailed Description
Embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment is as follows:
as shown in figures 1 to 7:
the invention provides an integral damping device for rail transit, which comprises a base 1, a pressure plate 3, a sealing top plate 5, a telescopic rubber tube 9 and a liquid return plate 11, wherein the base is provided with a base plate; a sleeve 2 is installed at the left end of the top of the base 1, the sleeve 2 is of a hollow structure, a sealing top plate 5 is installed on the top side of the sleeve 2, and a damping spring 4 is located inside the sleeve 2; a liquid storage shell 10 is arranged at the right end of the top of the base 1, the liquid storage shell 10 is of a hollow structure, and a liquid return spring 12 is located inside the liquid storage shell 10; the pressing plate 3 is attached to the inner wall of the sleeve 2; a guide sliding hole 501 is formed in the sealing top plate 5, the shock absorption moving part 7 is connected with the sealing top plate 5, and the shock absorption moving part 7 is located at the top of the sealing top plate 5; the damping spring 4 is installed inside the sleeve 2, the bottom end of the damping spring 4 is pressed on the top side of the left end of the base 1, the pressing plate 3 is installed inside the sleeve 2 in a sliding mode, the pressing plate 3 is pressed on the top end of the damping spring 4, the bottom of the damping moving part 7 is fixedly connected with the pressing plate 3, the bottom of the damping moving part 7 is connected into the guide sliding hole 501 inside the sealing top plate 5 in a sliding mode, when the damping moving part 7 drives the pressing plate 3 to move up and down inside the sleeve 2, the damping spring 4 elastically buffers the pressing plate 3, and the effect of damping and protecting the track is achieved; the top of the telescopic rubber tube 9 is connected to the outer side of the shock-absorbing moving part 7, the bottom of the telescopic rubber tube 9 is connected to the outer side of the sleeve 2, and the telescopic rubber tube 9 is located on the outer side of the return spring 6; the liquid return plate 11 is attached to the inner wall of the liquid storage shell 10.
The top of the base 1 is internally provided with a flow guide pipe 101, pipe orifices at two ends of the flow guide pipe 101 are respectively positioned on the top sides of the left end and the right end of the base 1, a pipe orifice at the left end of the flow guide pipe 101 is communicated with the bottom of the sleeve 2, a pipe orifice at the right end of the flow guide pipe 101 is communicated with the bottom of the liquid storage shell 10, and the ratio of the cross section area of the flow guide pipe 101 to the cross section area of the sleeve 2 is 1: 10; concrete function, when clamp plate 3 when 2 inside downstream of sleeve, 2 inside fluid of sleeve are pressed into in the liquid storage shell 10 through honeycomb duct 101 by 3 thrust influences of board, and 2 inside fluids of sleeve receive the discharge velocity to influence, play 3 auxiliary stay effects to the clamp plate.
The liquid return plate 11 is connected to the inside of the liquid storage shell 10 in a sliding manner, the liquid return spring 12 is installed inside the liquid storage shell 10, and the bottom of the liquid return spring 12 is pressed on the top side of the liquid return plate 11; concrete function, when 2 inside fluid entering liquid storage shell 10 of sleeve inside, fluid drives the inside liquid return plate 11 of liquid storage shell 10 and upwards lifts, and liquid return plate 11 receives the thrust influence of liquid return spring 12, with the inside fluid of liquid storage shell 10 backward flow to sleeve 2 in through honeycomb duct 101, the inside fluid sufficiency of guarantee liquid storage shell 10.
Wherein, the bottom of the shock-absorbing moving part 7 is sleeved with a return spring 6, the shock-absorbing moving part 7 is pressed on the top end of the return spring 6, and the bottom end of the return spring 6 is pressed on the top side of the sealing top plate 5; the concrete effect drives shock attenuation moving part 7 through return spring 6 and upwards removes, makes shock attenuation moving part 7 can return fast, ensures the fast nature of 7 returns of shock attenuation moving part.
The top sides of the left end and the right end of the base 1 are respectively provided with a rubber sealing ring 13, the rubber sealing ring 13 at the left end of the base 1 is attached to the inner wall of the sleeve 2, the rubber sealing ring 13 at the right end of the base 1 is attached to the inner wall of the liquid storage shell 10, the rubber sealing ring 13 is arranged on the periphery of the pressing plate 3, the rubber sealing ring 13 at the periphery of the pressing plate 3 is in sliding fit with the inner wall of the sleeve 2, the rubber sealing ring 13 is arranged on the periphery of the liquid return plate 11, and the rubber sealing ring 13 at the periphery of the liquid return plate 11 is in sliding fit with the inner wall of the liquid storage shell 10; concrete effect seals base 1 and clamp plate 3 that sleeve 2 is connected through rubber seal 13 to base 1 and time liquid board 11 that connect the stock solution shell 10 seal up, avoid fluid to flow in from sleeve 2 and stock solution shell 10 joint gap, influence fluid to 3 auxiliary stay effects of clamp plate.
The top of the left end of the base 1 is fixedly connected into the bottom of the sleeve 2 through a bolt 8, the top of the right end of the base 1 is fixedly connected into the bottom of the liquid storage shell 10 through the bolt 8, the sealing top plate 5 is fixedly connected to the top of the sleeve 2 through the bolt 8, and the pressing plate 3 is fixedly connected to the bottom of the damping moving part 7 through the bolt 8; the concrete effect, accessible bolt 8 is in the same place base 1, sleeve 2, clamp plate 3, sealed roof 5, shock attenuation moving part 7 and liquid storage shell 10 fixed connection, makes each parts dismouting of device more simple and convenient to the personnel carry out the dismouting to each parts dismouting of device and maintain.
The specific use mode and function of the embodiment are as follows:
when the damping protection device is used, the damping moving part 7 drives the pressing plate 3 to move up and down in the sleeve 2, and the damping spring 4 elastically buffers the pressing plate 3 to achieve the damping protection effect on a track; when the pressing plate 3 moves downwards in the sleeve 2, oil in the sleeve 2 is pressed into the liquid storage shell 10 through the flow guide pipe 101 under the influence of the thrust of the pressing plate 3, and the oil in the sleeve 2 is influenced by the discharge flow rate, so that an auxiliary supporting effect on the pressing plate 3 is achieved; when oil inside the sleeve 2 enters the liquid storage shell 10, the oil drives the liquid return plate 11 inside the liquid storage shell 10 to lift upwards, the liquid return plate 11 is influenced by the thrust of the liquid return spring 12, the oil inside the liquid storage shell 10 flows back into the sleeve 2 through the flow guide pipe 101, and the sufficiency of the oil inside the liquid storage shell 10 is guaranteed; the return spring 6 drives the shock-absorbing moving part 7 to move upwards, so that the shock-absorbing moving part 7 can return quickly, and the rapidness of return of the shock-absorbing moving part 7 is guaranteed; rubber seal 13 seals base 1 and clamp plate 3 that sleeve 2 is connected to 1 seals base 1 and the liquid return plate 11 that connect the stock solution shell 10, avoids fluid to flow out in sleeve 2 and the 10 joint line of stock solution shell, influences fluid to 3 auxiliary stay effects of clamp plate.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (5)
1. An integral damping device for rail transit, characterized in that: comprises a base (1), a pressure plate (3), a sealing top plate (5), a telescopic rubber tube (9) and a liquid return plate (11); the shock absorption device is characterized in that a sleeve (2) is mounted at the left end of the top of the base (1), the sleeve (2) is of a hollow structure, a sealing top plate (5) is mounted at the top side of the sleeve (2), and a damping spring (4) is located inside the sleeve (2); the liquid storage shell (10) is mounted at the right end of the top of the base (1), the liquid storage shell (10) is of a hollow structure, and the liquid return spring (12) is located inside the liquid storage shell (10); the pressing plate (3) is attached to the inner wall of the sleeve (2); a guide sliding hole (501) is formed in the sealing top plate (5), the shock absorption moving part (7) is connected with the sealing top plate (5), and the shock absorption moving part (7) is located at the top of the sealing top plate (5); the top of the telescopic rubber tube (9) is connected to the outer side of the shock-absorbing moving part (7), the bottom of the telescopic rubber tube (9) is connected to the outer side of the sleeve (2), and the telescopic rubber tube (9) is located on the outer side of the return spring (6); the liquid return plate (11) is attached to the inner wall of the liquid storage shell (10);
the damping spring (4) is installed inside the sleeve (2), the bottom end of the damping spring (4) is pressed on the top side of the left end of the base (1), the pressing plate (3) is installed inside the sleeve (2) in a sliding mode, the pressing plate (3) is pressed on the top end of the damping spring (4), the bottom of the damping moving part (7) is fixedly connected with the pressing plate (3), and the bottom of the damping moving part (7) is connected into the guide sliding hole (501) inside the sealing top plate (5) in a sliding mode;
a flow guide pipe (101) is arranged in the top of the base (1), pipe orifices at two ends of the flow guide pipe (101) are respectively located on the top sides of the left end and the right end of the base (1), a pipe orifice at the left end of the flow guide pipe (101) is communicated with the bottom of the sleeve (2), a pipe orifice at the right end of the flow guide pipe (101) is communicated with the bottom of the liquid storage shell (10), and the ratio of the cross sectional area of the flow guide pipe (101) to the cross sectional area of the sleeve (2) is 1: 10.
2. An integrated shock absorbing device for rail transit according to claim 1, wherein: the liquid return plate (11) is connected inside the liquid storage shell (10) in a sliding mode, the liquid return spring (12) is installed inside the liquid storage shell (10), and the bottom of the liquid return spring (12) is pressed on the top side of the liquid return plate (11).
3. An integrated shock absorbing device for rail transit according to claim 1, wherein: the bottom of the shock-absorbing moving part (7) is sleeved with a return spring (6), the shock-absorbing moving part (7) is pressed on the top end of the return spring (6), and the bottom end of the return spring (6) is pressed on the top side of the sealing top plate (5).
4. The integrated shock absorbing device for rail transit as claimed in claim 1, wherein: rubber seal (13) are installed respectively to both ends top side about base (1), base (1) left end rubber seal (13) pastes with sleeve (2) inner wall mutually, base (1) right-hand member rubber seal (13) pastes with stock solution shell (10) inner wall mutually, rubber seal (13) are installed to clamp plate (3) periphery, clamp plate (3) peripheral rubber seal (13) and sleeve (2) inner wall slide the laminating, return liquid board (11) periphery and install rubber seal (13), return liquid board (11) peripheral rubber seal (13) and stock solution shell (10) inner wall slide the laminating.
5. An integrated shock absorbing device for rail transit according to claim 1, wherein: base (1) left end top passes through bolt (8) fixed connection in sleeve (2) bottom, and base (1) right-hand member top passes through bolt (8) fixed connection in liquid storage shell (10) bottom, and sealed roof (5) pass through bolt (8) fixed connection in sleeve (2) top, and clamp plate (3) pass through bolt (8) fixed connection in shock attenuation moving part (7) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110353500.3A CN113089387B (en) | 2021-04-01 | 2021-04-01 | Integral damping device for rail transit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110353500.3A CN113089387B (en) | 2021-04-01 | 2021-04-01 | Integral damping device for rail transit |
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| Publication Number | Publication Date |
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| CN113089387A CN113089387A (en) | 2021-07-09 |
| CN113089387B true CN113089387B (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110353500.3A Active CN113089387B (en) | 2021-04-01 | 2021-04-01 | Integral damping device for rail transit |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100321819B1 (en) * | 1999-11-18 | 2002-02-02 | 장영길 | absorb shock plate of railroad |
| KR100626882B1 (en) * | 2004-01-29 | 2006-09-20 | (주) 철도안전연구소 | Apparatus for rail fastening having pad delivering load to roadbed through pad itself |
| CN105952837B (en) * | 2016-07-14 | 2018-10-26 | 同济大学 | A kind of compound isolation mounting based on air spring and particle damping material |
| CN110685195B (en) * | 2019-09-18 | 2021-04-02 | 南京溧水高新创业投资管理有限公司 | Rail transit vibration damping mount |
| CN110700023A (en) * | 2019-10-15 | 2020-01-17 | 中铁四局集团有限公司 | Steel spring floating plate integral ballast bed construction method based on rail engineering |
| CN211922100U (en) * | 2019-12-04 | 2020-11-13 | 华东交通大学 | Novel damping track structure |
| CN112360917A (en) * | 2020-09-24 | 2021-02-12 | 北京京港地铁有限公司 | Damping device for rail transit |
| CN112324845A (en) * | 2020-11-06 | 2021-02-05 | 浙江硕维轨道交通装备有限公司 | Subway track damping device |
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2021
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Effective date of registration: 20220701 Address after: 061600 No. 43, Huiyuan Road, Chengdong Development Zone, Dongguang County, Cangzhou City, Hebei Province Applicant after: CANGZHOU HUAYU RAILWAY EQUIPMENT Co.,Ltd. Address before: 313000 Yucai Road Huzhou Yufeng Transportation Co., Ltd., Wuxing District, Huzhou City, Zhejiang Province Applicant before: Zhou Yungui |
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