CN109483703B - Concrete sleeper mould cleaning system - Google Patents
Concrete sleeper mould cleaning system Download PDFInfo
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- CN109483703B CN109483703B CN201811178788.XA CN201811178788A CN109483703B CN 109483703 B CN109483703 B CN 109483703B CN 201811178788 A CN201811178788 A CN 201811178788A CN 109483703 B CN109483703 B CN 109483703B
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- Prior art keywords
- sweeper
- rack
- concrete sleeper
- walking
- supporting rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
- B28B7/386—Cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/04—Cleaning by suction, with or without auxiliary action
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/02—Frames; Beds; Carriages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a concrete sleeper die cleaning system, which relates to the technical field of rail equipment maintenance and comprises a storage platform for placing a concrete sleeper die, wherein the storage platform comprises an automatic cleaning machine and guide grooves fixedly connected to two sides of the concrete sleeper die; the automatic sweeper comprises a rack, a traveling device, a sweeper, a supporting rod device and a dust collection device, wherein the traveling device is matched with the guide groove, supports the rack and provides power for the automatic sweeper, the sweeper is in contact with the inner cavity of the concrete sleeper mold and cleans the inner cavity of the concrete sleeper mold, the supporting rod device is used for connecting the rack and the sweeper and can adjust the length and the angle, and the dust collection device is fixedly connected with the rack and is positioned behind the sweeper. The automatic die cleaning machine has the advantages that the die is automatically cleaned, the labor intensity is reduced, the cleaning efficiency is improved, the dust pollution is reduced, and the environment of workers is improved.
Description
Technical Field
The invention relates to the technical field of rail equipment maintenance, in particular to a sleeper mold maintenance technology.
Background
A tie is a component of a railroad track that both supports and maintains the position of the rails and transfers the large forces from the rails to the track bed. Because the elasticity and the insulating property of wood are good, the sleeper in the early stage is generally made of wood, and the concrete sleeper has the advantages of long service life, high stability and small maintenance workload, and the damage rate and the rejection rate are far lower than those of the sleeper. Therefore, the device is widely used on high-speed railways and heavy haul railways. The existing sleeper mould is used for manufacturing a concrete sleeper by firstly placing reinforcing steel bars in a pouring groove before pouring concrete, then penetrating a tension screw rod through holes on end plates at two ends of the mould and screwing the tension screw rod with the reinforcing steel bars together. In the prior art, the inner cavity of a concrete sleeper mould is usually divided into a left area space and a right area space, the shape of the inner cavity of the mould is complex, concrete remains in the mould after demoulding, and particularly the side wall of the mould can be adhered with the concrete, so that the appearance of a produced sleeper product is not smooth, the sleeper has defects, and demoulding difficulty is further caused.
Disclosure of Invention
The invention aims to provide a concrete sleeper die cleaning system which can automatically clean a die cavity in a die, reduce labor intensity, improve cleaning efficiency, reduce dust pollution and improve the environment of workers.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a concrete sleeper mould cleaning system comprises an automatic cleaning machine and guide grooves fixedly connected to two sides of a concrete sleeper mould; the automatic sweeper comprises a rack, a traveling device, a sweeper, a supporting rod device and a dust collection device, wherein the traveling device is matched with the guide groove, supports the rack and provides power for the automatic sweeper, the sweeper is in contact with the inner cavity of the concrete sleeper mold and cleans the inner cavity of the concrete sleeper mold, the supporting rod device is used for connecting the rack and the sweeper and can adjust the length and the angle, and the dust collection device is fixedly connected with the rack and is positioned behind the sweeper.
The technical scheme of the invention is further improved as follows: the guide groove is fixedly connected to the top of the side wall of the concrete sleeper mold, the cross section of the guide groove is in an inverted T shape, the walking device comprises a walking support fixedly connected to the lower surface of the frame, walking wheels embedded into the guide groove and hinged to the lower end of the walking support, upper supporting wheels hinged to the walking support and rolling on the upper surface of the top wall of the guide groove, and lower guide wheels hinged to the walking support and rolling on the lower surface of the top wall of the guide groove; a rotating shaft of the walking wheel is vertically arranged, and the walking wheel rolls on the vertical wall surface at the inner side of the guide groove; a pair of upper supporting wheels and a pair of lower guide wheels are symmetrically arranged on the left side and the right side of the walking bracket; four walking devices are arranged, and two walking devices are arranged on the left side and the right side of the rack respectively.
The technical scheme of the invention is further improved as follows: the supporting rod device comprises a supporting rod hinged with the lower surface of the rack, an angle adjusting mechanism with one end hinged with the lower surface of the rack and the other end hinged with the middle part of the supporting rod, and a height adjusting mechanism arranged at the middle part of the supporting rod; the two pairs of supporting rod devices are arranged in the cavities on the left side and the right side of the concrete sleeper die side by side.
The technical scheme of the invention is further improved as follows: the height adjusting mechanism and the angle adjusting mechanism both comprise hydraulic telescopic rods, and a control device for controlling the hydraulic telescopic rods to act is arranged inside the rack.
The technical scheme of the invention is further improved as follows: the sweeper comprises a lateral sweeper fixedly connected to the side surface of the supporting rod and a bottom sweeper fixedly connected to the bottom of the supporting rod; the lateral sweeper is provided with three rows of upper and lower grinding heads, each row is provided with two grinding heads, the size of each grinding head is the same, and the rotating directions of two adjacent grinding heads in the same row are opposite.
The technical scheme of the invention is further improved as follows: dust extraction one end and frame fixed connection, the other end downwardly extending to the rear of bottom sweeper, the inside pipeline of dust extraction is linked together with the inside air compressor of frame.
Due to the adoption of the technical scheme, the invention has the technical progress that:
the sweeper is controlled to sweep the die with a complex structure through the fixed sweeping route and the supporting rod device with the adjustable angle and height, so that the automatic thorough sweeping of the die cavity inside the die is realized, the automation degree is improved, the labor intensity is reduced, the sweeping efficiency is improved, the dust pollution is reduced, and the environment of workers is improved.
The guide groove effectively controls a walking route of the automatic sweeper, the T-shaped guide groove effectively prevents walking wheels from being separated from the guide groove, the walking wheels roll on a vertical wall surface on the inner side of the guide groove to provide forward power for the automatic sweeper, and a motor driving the walking wheels can be directly arranged in a rack above the walking wheels through a rotating shaft which is vertically arranged on the walking wheels, so that the motor of the walking wheels can be conveniently installed. The upper supporting wheel and the lower guide wheel are in rolling contact with the top of the guide groove, so that the friction force is reduced. The upper supporting wheels on the upper surface of the guide groove effectively support the weight of the automatic sweeper, and two walking devices are arranged on the left side and the right side of the frame respectively, so that the left and the right stress of the automatic sweeper are balanced, and the automatic sweeper is effectively prevented from inclining.
The angle adjusting mechanism and the height adjusting mechanism ensure that the sweeper can be in contact with the concrete sleeper die and clean the concrete sleeper die. The dust suction device is positioned behind the bottom sweeper and is convenient for directly recovering and sucking dust swept by the bottom sweeper. The arrangement of the polishing heads on the sweeper reduces the possibility of flying of the cleaned cement powder, the cleaned powder is conveniently collected and then treated by the dust suction device, and the working environment is optimized.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the automatic sweeper of the present invention;
FIG. 3 is a schematic view of another construction of the automatic sweeper of the present invention;
the device comprises an automatic sweeper 1, a concrete sleeper mold 2, a guide groove 3, a rack 4, a frame 5, a cross beam 6, a lateral sweeper 7, a bottom sweeper 8, a support rod 8, a height adjusting mechanism 8a, an angle adjusting mechanism 8b, a walking wheel 9a, a walking support 9b, a walking support 9c, an upper support wheel 9d, a lower guide wheel 10 and a dust collection device.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
as shown in fig. 1, 2 and 3, a concrete sleeper mold cleaning system includes an automatic cleaner 1 and a guide groove 3. The guide way 3 sets up at the top of concrete pillow mould 2 both sides face, and two guide ways 3 set up relatively. Concrete sleeper mould 2 stews on platform, has added the adhesive between concrete sleeper mould 2 and platform, and under the effect of 2 self weight of concrete sleeper mould and adhesive, concrete sleeper mould 2 is fixed with platform, and concrete sleeper mould 2 can not produce the horizontal displacement for platform. The automatic cleaner 1 is placed in the concrete sleeper mold 2, and the running gear of the automatic cleaner 1 is fitted into the guide groove 3.
The automatic cleaner 1 includes a frame 4, a running gear, a cleaner, a support rod device, and a dust suction device 10. The frame 4 is located on the upper portion of the automatic sweeper 1, the walking devices are arranged on the left side and the right side of the frame 4, the supporting rod devices are hinged to the lower surface of the frame 4 and extend downwards to connect the frame 4 with the sweeper and provide support for the sweeper. The sweeper directly contacts with the inner cavity of the concrete sleeper die 2 to sweep the inner surface of the concrete sleeper die 2. The dust suction device 10 is fixedly connected with and communicated with the frame 4, and the whole dust suction device 10 is positioned at the rear of the sweeper.
The running gear comprises two running wheels 9a, a running support 9b, upper supporting wheels 9c and lower guide wheels 9d, and the number of the running gear is four, two on each side of the frame 4. The cross section of the guide groove 3 is in an inverted T shape, the walking wheels 9a are positioned in the guide groove 3, the rotating shafts of the walking wheels 9a are vertical, the walking wheels 9a rotate horizontally, the walking wheels 9a are in contact with the wall surface of the inner side of the guide groove 3, and meanwhile, the walking wheels 9a roll and move at the bottom of the cavity of the guide groove 3, so that the walking wheels 9a move in the guide groove 3 with extremely small friction. The walking wheels 9a are hinged to the tail ends of the walking brackets 9b, the longitudinal vertical cross section of each walking bracket 9b is trapezoidal, the lower surface of the rack 4 is at the fixed connection position of the walking bracket 9b and the rack 4, and the walking wheels 9a are hinged to the lower surface of the walking bracket 9 b. The running wheels 9a are driven by a motor, the power supply of which is connected with the power supply via a conductor line in the frame 4. Meanwhile, a control circuit for the motor is connected with the motor to control the rotating speed and stop of the motor and further control the advancing speed and stop of the automatic sweeper 1. An upper supporting wheel 9c and a lower guiding wheel 9d are respectively arranged on the left side and the right side of the walking support 9b, the upper supporting wheel 9c and the lower guiding wheel 9d on the two sides are symmetrically arranged, the upper supporting wheel 9c and the lower guiding wheel 9d are hinged with the walking support 9b, rotating shafts of the upper supporting wheel 9c and the lower guiding wheel 9d are horizontally arranged, the lower guiding wheel 9d is positioned above the walking wheel 9a, and the upper supporting wheel 9c is positioned above the lower guiding wheel 9 d. The lower guide wheel 9d is positioned in the guide groove 3, is contacted with the upper surface in the cavity of the guide groove 3 and rolls in the guide groove 3 to advance; the upper support wheels 9c are located outside the guide grooves 3, and come into contact with the upper surface of the top wall of the guide grooves 3 and roll forward there.
The support frame device comprises a support rod 8, an angle adjusting mechanism 8b, a height adjusting mechanism 8a and a hydraulic device for controlling the angle adjusting mechanism 8b and the height adjusting mechanism 8 a. The support rod 8 is hinged to the lower surface of the frame 4, the support rod 8 can swing left and right, and the support rod 8 extends downwards and is fixedly connected with the sweeper. A pair of support rods 8 are respectively arranged in the left side cavity space and the right side cavity space of the concrete sleeper mold 2. A height adjusting mechanism 8a is arranged at the middle part of the supporting rod 8, and the whole vertical length of the supporting rod 8 is adjusted by controlling the extension and retraction of the height adjusting mechanism 8a through a hydraulic mechanism. One end of the angle adjusting mechanism 8b is hinged to the lower surface of the rack 4, the other end of the angle adjusting mechanism is hinged to the middle part of the supporting rod 8, the angle adjusting mechanism 8b is controlled to stretch through the hydraulic mechanism, and the angle adjusting mechanisms 8b are oppositely arranged and push the supporting rod 8 to swing towards two sides. The control mechanism for the hydraulic devices described above is located inside the frame 4, with the corresponding hydraulic lines extending throughout the interior of the automatic sweeper 1. The angle adjusting mechanism 8b is arranged between two opposite supporting rods 8 in the left side cavity or the right side cavity.
The sweeper is composed of a plurality of polishing heads and a base, the sweeper is used for sweeping the concrete sleeper mold 2, the base is used for supporting the polishing heads, the polishing heads can be angle grinder polishing heads, and the sweeper is divided into a lateral sweeper 6 and a bottom sweeper 7. The lateral sweeper 6 is fixedly connected to the side surface of the support rod 8 and is in contact with the side wall of the inner cavity of the concrete sleeper mould 2. Each lateral sweeper 6 comprises six sanding heads, all of which are identical in shape and size and work together. The grinding heads of the lateral sweeper 6 are divided into three rows, namely an upper row and a lower row, and each row is provided with two grinding heads. The centers of the polishing heads in each row are on the same horizontal line, the distances between the polishing heads in the same row are equal, and the rotating directions of two adjacent polishing heads in the same row are opposite. The bottom sweeper 7 is fixedly connected to the bottom of the support rod 8, and each bottom sweeper 7 is provided with two polishing heads which are in contact with the bottom of the inner cavity of the concrete sleeper mold 2. The motor driving each sanding head to rotate can be positioned in the base, and the motor can also be positioned in the supporting rod 8 and transmits power to the sweeper in a mechanical transmission mode. The base is connected with the tail end of the supporting rod 8 through an elastic piece, so that the base drives the sweeper to float.
One end of the dust suction device 10 is fixedly connected with the frame 4, the upper part of the dust suction device 10 extends horizontally, then the tail end of the dust suction device 10 extends downwards to the rear of the bottom sweeper 7, the upper parts of the leftmost dust suction device 10 and the rightmost dust suction device 10 are fixedly connected with the frame 4 through the cross beam 5, and the two dust suction devices 10 are fixedly connected with the left dust suction device 10 or the right dust suction device 10 through the cross beam. Dust on the concrete sleeper mold 2 includes dust cleaned by the bottom sweeper 7 and dust falling on the concrete sleeper mold 2 after being swept by the side sweeper 6, and is sucked away from the bottom thereof by the dust suction device 10. The internal pipeline of the dust collector 10 is communicated with the internal pipeline of the frame 4, an air compressor in the frame 4 is communicated with the internal pipeline of the frame 4 and the internal pipeline of the frame 4 for carrying out vacuum suction operation, and a dust collecting device is arranged in the frame 4.
A walking control device is arranged in the frame 4 and connected with the walking device and the supporting device, the walking control device is a set of Programmable Logic Controller (PLC) control system, and controls the specific actions of the walking device and the supporting frame device, including the rotation speed and walking stop of a motor of a walking wheel 9a, the actions of a hydraulic system of an angle adjusting mechanism 8b and a height adjusting mechanism 8a, and the rotation speed and starting and closing of a polishing head on the sweeper. The walking control device enables the automatic cleaning machine to adapt to various changes in the advancing process, and controls the advancing distance, the advancing speed, the stopping position, the cleaning strength, the cleaning position and the like of the automatic cleaning machine, so that the automatic cleaning machine can adapt to the bottom fluctuation and the shape change of the inner cavity of the concrete sleeper mold.
Claims (4)
1. The utility model provides a concrete sleeper mould cleaning system which characterized in that: comprises an automatic cleaning machine (1) and guide grooves (3) fixedly connected with the two sides of a concrete sleeper mould (2); the automatic sweeper (1) comprises a rack (4), a walking device which is matched with the guide groove (3) and used for supporting the rack (4) and providing power for the automatic sweeper (1), a sweeper which is contacted with the inner cavity of the concrete sleeper die (2) and used for sweeping the inner cavity of the concrete sleeper die (2), a supporting rod device which is used for connecting the rack (4) with the sweeper and can adjust the length and the angle, and a dust suction device (10) which is positioned behind the sweeper and fixedly connected with the rack (4); the guide groove (3) is fixedly connected to the top of the side wall of the concrete pillow mould (2), and the cross section of the guide groove (3) is in an inverted T shape; four traveling devices are arranged, and two traveling devices are arranged on the left side and the right side of the rack (4); the supporting rod device comprises a supporting rod (8) hinged with the lower surface of the rack (4), an angle adjusting mechanism (8 b) with one end hinged with the lower surface of the rack (4) and one end hinged with the middle part of the supporting rod (8), and a height adjusting mechanism (8 a) arranged at the middle part of the supporting rod (8); the two pairs of supporting rod devices are arranged in the cavities on the left side and the right side of the concrete pillow mould (2) side by side; the walking device comprises a walking support (9 b) fixedly connected to the lower surface of the rack (4), walking wheels (9 a) embedded in the guide grooves (3) and hinged to the lower end of the walking support (9 b), upper supporting wheels (9 c) rolling on the upper surface of the top wall of the guide grooves (3) and hinged to the walking support (9 b), and lower guide wheels (9 d) rolling on the lower surface of the top wall of the guide grooves (3) and hinged to the walking support (9 b); the rotating shaft of the walking wheel (9 a) is vertically arranged, and the walking wheel (9 a) rolls on the vertical wall surface at the inner side of the guide groove (3); the left side and the right side of the walking bracket (9 b) are symmetrically provided with a pair of upper supporting wheels (9 c) and a pair of lower guide wheels (9 d).
2. A concrete sleeper mold cleaning system as defined in claim 1, wherein: the height adjusting mechanism (8 a) and the angle adjusting mechanism (8 b) both comprise hydraulic telescopic rods, and a control device for controlling the hydraulic telescopic rods to act is arranged inside the rack (4).
3. A concrete sleeper mold cleaning system as defined in claim 1, wherein: the sweeper comprises a lateral sweeper (6) fixedly connected to the side surface of the supporting rod (8) and a bottom sweeper (7) fixedly connected to the bottom of the supporting rod (8); the lateral sweeper (6) is provided with three rows of upper and lower grinding heads, each row is provided with two grinding heads, the size of each grinding head is the same, and the rotating directions of two adjacent grinding heads in the same row are opposite.
4. A concrete sleeper mold cleaning system as defined in claim 3, wherein: one end of the dust suction device (10) is fixedly connected with the rack (4), the other end of the dust suction device extends downwards to the rear of the bottom sweeper (7), and a pipeline inside the dust suction device (10) is communicated with an air compressor inside the rack (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811178788.XA CN109483703B (en) | 2018-10-10 | 2018-10-10 | Concrete sleeper mould cleaning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811178788.XA CN109483703B (en) | 2018-10-10 | 2018-10-10 | Concrete sleeper mould cleaning system |
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| Publication Number | Publication Date |
|---|---|
| CN109483703A CN109483703A (en) | 2019-03-19 |
| CN109483703B true CN109483703B (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811178788.XA Active CN109483703B (en) | 2018-10-10 | 2018-10-10 | Concrete sleeper mould cleaning system |
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| CN (1) | CN109483703B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110153846B (en) * | 2019-06-11 | 2024-05-28 | 北京好运达智创科技有限公司 | Automatic cleaning device for sleeper die |
| CN113442283B (en) * | 2021-07-29 | 2022-06-17 | 光明铁道控股有限公司 | Concrete forming device based on sleeper preparation |
| CN113547619A (en) * | 2021-07-29 | 2021-10-26 | 北京好运达智创科技有限公司 | External mold cleaning and polishing system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941192A (en) * | 2012-10-17 | 2013-02-27 | 上海中技桩业股份有限公司 | Sweeper of U-shaped plate pile steel mold |
| CN104441213A (en) * | 2014-10-20 | 2015-03-25 | 芜湖市泰能电热器具有限公司 | Board leftover removing device |
-
2018
- 2018-10-10 CN CN201811178788.XA patent/CN109483703B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941192A (en) * | 2012-10-17 | 2013-02-27 | 上海中技桩业股份有限公司 | Sweeper of U-shaped plate pile steel mold |
| CN104441213A (en) * | 2014-10-20 | 2015-03-25 | 芜湖市泰能电热器具有限公司 | Board leftover removing device |
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| CN109483703A (en) | 2019-03-19 |
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Effective date of registration: 20210611 Address after: Floor 16, building IBCC, Huixin, No.1 zhangbayi Road, high tech Zone, Xi'an City, Shaanxi Province, 710065 Patentee after: CCCC Railway Construction Co.,Ltd. Patentee after: SHIJIAZHUANG TIEDAO University Address before: 12 / F, No.33, Keji 6th Road, Xi'an, Shaanxi 710065 Patentee before: CCCC-SHEC RAILWAY ENGINEERING Co.,Ltd. Patentee before: SHIJIAZHUANG TIEDAO University |
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