CN214656050U - A rust cleaning device for rail - Google Patents
A rust cleaning device for rail Download PDFInfo
- Publication number
- CN214656050U CN214656050U CN202120555022.XU CN202120555022U CN214656050U CN 214656050 U CN214656050 U CN 214656050U CN 202120555022 U CN202120555022 U CN 202120555022U CN 214656050 U CN214656050 U CN 214656050U
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- China
- Prior art keywords
- laser
- rail
- trolley
- emitting device
- laser emitting
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- 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.)
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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
- E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
- E01B31/02—Working rail or other metal track components on the spot
- E01B31/12—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/142—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor for the removal of by-products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/02—Carriages for supporting the welding or cutting element
- B23K37/0211—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/26—Railway- or like rails
Abstract
The invention discloses a rust removing device for steel rails, which comprises a first trolley, a plurality of laser generators, a smoke purifying device, a second trolley and a plurality of laser emitting devices. The laser rust removing device carries the laser generator and the smoke purifying device along the steel rail through the first trolley, carries the laser emitting device along the steel rail through the second trolley, carries out laser rust removing operation on the steel rail through the laser generator and the laser emitting device, and collects waste gas and particles generated by rust removing through the smoke purifying device. The rust removing device for the steel rail, provided by the invention, is simple to operate, low in equipment cost and high in working efficiency, reduces the labor intensity of constructors, improves the construction environment and has a good application prospect.
Description
Technical Field
The invention relates to a rust removing device for a steel rail.
Background
After the steel rail leaves a factory, the surface of the steel rail is easy to be corroded due to factors such as long-time placement and the like. In the construction process of urban rail transit, the seamless steel rail welding is usually operated in a flash butt welding mode. When the flash butt welding mode is adopted for operation, two ends of a steel rail to be welded need to be electrified, but the corrosion can seriously affect the electrifying efficiency and the welding result of the steel rail, and the condition that an electrifying loop cannot be formed can be caused in serious conditions.
In the current urban rail transit construction, a copying grinder or a handheld grinder which needs manual operation is mostly adopted to remove rust on the steel rail. The grinding machine polishes the steel rail in a grinding mode, inevitably damages a steel rail base metal, and meanwhile, metal processing powder is generated during polishing, so that the operation environment in the tunnel is seriously polluted. Because the environment of a construction site is complex, the steel rail is easily polluted by pollutants such as oil stains, and the like, and because the rust removing method of a grinding wheel machine and the like adopts contact cleaning, the pollutants or sand particles on a grinding wheel are easily attached to the surface of the ground steel rail, so that secondary pollution is generated. The derusting result is judged by human eyes, and the derusting efficiency is greatly influenced by the proficiency of operators. The derusting mode consumes time and labor, and the construction process can cause great damage to the health of operators, so that the current requirements on the laying precision and speed of the seamless line cannot be met.
Disclosure of Invention
The invention provides a rust removing device for a steel rail, aiming at solving the problems of low working efficiency, large environmental pollution, serious abrasion to a steel rail base metal, large consumption of human resources and the like in the rust removing operation of a manually-held grinder for the steel rail.
The invention provides a rust removing device for steel rails, which comprises a first trolley, a plurality of laser generators, a smoke purifying device, a second trolley and a plurality of laser emitting devices, wherein the first trolley is arranged on the first trolley;
the first trolley comprises a first trolley body and first wheels, and the first wheels are arranged at the bottom of the first trolley body and move along the steel rail; the first vehicle body is used for carrying a laser generator and a smoke purification device;
the laser generators are arranged on the first trolley, and each laser generator is provided with a resonant cavity and is used for generating laser;
the smoke purification device is arranged on the first trolley; the smoke purification device is provided with a centrifugal fan and is used for collecting waste gas and particles generated by rust removal;
the second trolley comprises a second trolley body, a second wheel and two mounting frames, wherein the second wheel is arranged at the bottom of the second trolley body and moves along the steel rail; the two mounting frames are fixedly arranged on the second vehicle body, extend to the steel rail and are distributed on two sides of the steel rail;
and two laser emitting devices are arranged on each mounting frame and are used for emitting laser and removing rust on the surface of the steel rail.
Preferably, the two mounting brackets are arranged asymmetrically on two sides of the steel rail.
Preferably, the steel rail comprises a rail head, a rail web and a rail bottom, wherein the rail web is positioned between the rail head and the rail bottom; the laser emitting device is used for removing rust on the rail head or the rail web.
Preferably, each mounting bracket comprises a first portion and a second portion, the first portion being fixedly connected to the second vehicle body; the first part or the second part is in a bent shape and comprises a bottom plate and side plates positioned at two sides of the bottom plate; the bottom plate and the side plates on the two sides of the bottom plate form a groove structure, and the second part can be arranged in the groove structure of the first part;
a strip-shaped through hole is formed in the middle of the bottom plate of the first part or the second part; the second part penetrates into the groove structure of the first part, the bolt penetrates through the through holes of the first part and the second part, and the bottom plate of the first part and the bottom plate of the second part are clamped and fixed, so that the first part and the second part are connected.
Preferably, the first laser emitting device is used for carrying out laser rust removal on the surface of the rail head, and the second laser emitting device is used for carrying out laser rust removal on the side face of the rail waist;
the laser emitting device arranged on the first portion of each mounting frame is a first laser emitting device, and the laser emitting device arranged on the second portion of each mounting frame is a second laser emitting device.
Preferably, the distance between the second laser emitting device and the steel rail is adjusted by changing the length of the second part penetrating into the first part;
the distance between the first laser emitting device and the steel rail is adjusted by changing the installation position of the first laser emitting device along the direction of the first part.
Preferably, the rust removing device at least comprises four laser generators, and one laser generator corresponds to one laser emitting device.
Preferably, each laser generator is connected to a corresponding laser emitting device by an optical fiber for transmitting laser light.
Preferably, the smoke purification device comprises a universal dust hood, the universal dust hood is provided with a corrugated pipe, and the universal dust hood extends to the steel rail and collects waste gas and particulate matters generated by rust removal.
The invention provides another technical scheme which is a rust removing method based on the rust removing device, comprising the following processes:
adjusting the mounting position of the first laser emitting device on each mounting frame on the first part so that each first laser emitting device is close to the rail head;
adjusting the length of the second part penetrating into the first part on each mounting frame, so that each second laser emitting device is close to the rail web;
adjusting the universal dust hood to be close to the steel rail to be processed;
starting the smoke purification device and each laser generator, pushing the second trolley to move along the steel rail, carrying out laser rust removal on the surfaces of the rail head and the rail web by each laser emitting device along the moving direction of the second trolley, and simultaneously collecting waste gas and particulate matters generated by rust removal by the universal dust hood along the moving direction of the second trolley.
Compared with the prior art, the rust removal device for the steel rail provided by the invention adopts laser to remove rust, so that the cleanliness of the steel rail can be ensured while the operation efficiency is obviously improved, and the pollution of contact rust removal to the steel rail is effectively avoided; the rust removal device is provided with the smoke purification device, so that waste gas and particles generated by rust removal can be effectively collected, air is purified, and the working environment is improved. The rust removing device for the steel rail, provided by the invention, is simple to operate, low in equipment cost and high in working efficiency, reduces the labor intensity of constructors, improves the construction environment and has a good application prospect.
Drawings
FIG. 1 is a schematic structural view of a rail according to the present invention;
FIG. 2 is a schematic structural view of a rust removing apparatus according to the present invention;
FIG. 3 is a schematic structural view of the mount of the present invention;
fig. 4 is a schematic distribution diagram of the laser emitting device according to the present invention.
Detailed Description
The present invention will now be described in further detail by way of the detailed description of preferred embodiments with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the steel rail of the present invention. As shown in fig. 1, the steel rail 600 includes a rail head 610, a rail web 620, and a rail foot 630; the rail web 620 is located between the rail head 610 and the rail base 630, the rail head 610 is located above the rail web 620, and the rail base 630 is located below the rail web 620. Before the flash butt welding operation is performed on the steel rail, the surface of the steel rail needs to be subjected to rust removal treatment, specifically, the surface of the rail head 610 and two side surfaces of the rail web 620 are subjected to rust removal treatment.
FIG. 2 is a schematic structural view of the rust removing apparatus according to the present invention. As shown in fig. 2, the rust removing device comprises a first trolley 100, a plurality of laser generators 200, a smoke purifying device 300, a second trolley 400 and a plurality of laser emitting devices 500.
The first cart 100 includes a first body 110 and a first wheel 120; the first wheel 120 is disposed at the bottom of the first body 110 such that the first carriage 100 can move along the rail 600; in the embodiment of the present invention, four first wheels 120 are disposed at the bottom of the first vehicle body 110, as shown in fig. 2; the first car body 110 is used for placing and arranging a plurality of laser generators 200 and smoke cleaning devices 300, and the first car 100 carries the plurality of laser generators 200 and smoke cleaning devices 300 to move along the steel rail 600.
In the embodiment of the present invention, the first cart 100 is provided with four laser generators 200 (only two laser generators are shown in fig. 2) and one smoke purifying device 300. Each laser generator 200 is provided with a resonant cavity (not shown) therein for generating laser light. The inside of the smoke purifying device 300 is provided with a centrifugal fan (not shown in the figure) for collecting waste gas and particles generated by rust removal.
The second cart 400 includes a second body 410, a second wheel 420, and two mounts 430; the second wheel 420 is provided at the bottom of the second body 410 so that the second carriage 400 can move along the rail 600; in the embodiment of the present invention, four second wheels 420 are disposed at the bottom of the second vehicle body 410, as shown in fig. 2; the two mounting brackets 430 are fixedly arranged on the second vehicle body 410, and the two mounting brackets 430 extend to the steel rail 600 below the second wheel 420 and are distributed on two sides of the steel rail 600; the mounting rack 430 is used for mounting and arranging the laser emitting device 500; the second trolley 400 carries the laser emitting device 500 to move along the steel rail 600, and the laser emitting device 500 emits laser to perform laser derusting on the steel rail 600.
In the embodiment of the invention, the two mounting brackets 430 on the second trolley are arranged asymmetrically on two sides of the steel rail, that is, the two mounting brackets are staggered by a certain distance in the direction of the steel rail 600 and are respectively positioned at different positions of the steel rail, so that the laser emitting devices of the two mounting brackets are used for preventing a section of steel rail from being simultaneously subjected to rust removal operation, and the temperature of the section of steel rail is overhigh.
In the embodiment of the present invention, the structures of the first vehicle body 110 and the second vehicle body 410 are shown in fig. 2, the first vehicle body 110 and the second vehicle body 410 may also be designed in other structures or according to requirements during the application process, and the present invention does not limit the specific structures of the vehicle bodies, and thus the description is provided herein.
Fig. 3 is a schematic structural view of the mounting bracket of the present invention. As shown in fig. 3, each mounting bracket 430 includes a first portion 431 and a second portion 432; the first portion 431 or the second portion 432 is designed to be bent, and the bending angle can be specifically set according to the requirement, which is not limited by the invention. The first part 431 or the second part 432 comprises a bottom plate a and side plates b and c positioned at two sides of the bottom plate; the bottom plate a and the side plates b and c on both sides of the bottom plate form a groove structure, and the second part 432 can be placed in the groove structure of the first part 431. A strip-shaped through hole A is formed in the middle of the bottom plates of the first part 431 and the second part 432; the second part 432 is arranged in the groove structure of the first part 431, the bottom plate of the first part is tightly attached to the bottom plate of the second part, bolts penetrate through the through holes of the first part and the second part and are matched with matched nuts, and the bottom plate of the first part and the bottom plate of the second part are clamped and fixed, so that the first part 431 is connected with the second part 432. Each of the mounts is fixedly coupled to the second body 410 by a first portion 431.
Fig. 4 is a schematic distribution diagram of the laser emitting device according to the present invention. As shown in fig. 4, at least two laser emitting devices are disposed on each mounting bracket 430, wherein one laser emitting device is disposed on the first portion 431 of the mounting bracket, and the other laser emitting device is disposed on the second portion 432 of the mounting bracket. A laser emitting device arranged on the first portion 431 is used as a first laser emitting device 510, and the first laser emitting device is used for removing rust on the surface of a rail head 610 of a steel rail; the laser emitting device arranged on the second portion 432 is used as a second laser emitting device 520, and the second laser emitting device is used for removing rust on the side surface of the rail web 620 of the steel rail. According to the rust removing device provided by the invention, the installation position of the first laser emitting device 510 is changed along the direction of the first part 431, so that the distance between the first laser emitting device and the steel rail 600 can be adjusted; the distance between the second laser emitting device 520 and the rail 600 can also be adjusted by changing the length of the penetration of the second portion 432 into the first portion 431. The laser emitting device 500 (including the first laser emitting device 510 and the second laser emitting device 520) may be fixedly mounted on the mounting bracket by welding, or may be mounted by a connector or other means, which is not limited herein.
In the rust removing device provided by the invention, one laser generator 200 corresponds to one laser emitting device 500. The laser generator 200 is connected to the corresponding laser emitting device 500 through an optical fiber (not shown), the optical fiber transmits laser generated by the laser generator 200 to the corresponding laser emitting device 500, and the laser emitting device 500 emits the laser to remove rust on the steel rail 600. In the embodiment of the present invention, each laser generator 200 is further provided with a ventilation device and a water cooling circulation device (not shown in the figure) for cooling the resonant cavity and the corresponding laser emitting device. The water-cooling circulation equipment comprises a water pipe and a laser emission device, wherein the water pipe is arranged on the two water pipes, the two water pipes are connected with the laser emission device corresponding to the laser generator, and a water circulation loop is formed between the laser generator and the laser emission device and is cooled through water circulation. The light and the two water pipes between each laser generator and the corresponding laser emitting device can be covered and protected by a corrugated pipe (not shown in the figure).
The smoke purification device 300 comprises a universal dust hood, the universal dust hood is provided with a corrugated pipe 310, and the universal dust hood or the corrugated pipe 310 is fixedly arranged on the second trolley 400, so that the universal dust hood extends to the steel rail 600 and collects waste gas and particles generated by rust removal.
When the rust removing device provided by the invention is used, firstly, the mounting position of the first laser emitting device 510 on the first part 431 on each mounting frame is adjusted, so that each first laser emitting device 510 is close to the rail head 610; adjusting the length of penetration of the second portion 432 into the first portion 431 on each mounting bracket so that each second laser emitting device 520 is close to the web 620; adjusting the universal dust hood to be close to the steel rail 600 to be processed; starting the smoke purification device 300 and each laser generator 200, pushing the second trolley 400 to move along the steel rail 600, carrying out laser rust removal on the surfaces of the rail head and the rail web along the moving direction of the second trolley by each laser emitting device 500, and meanwhile, collecting waste gas and particulate matters generated by rust removal along the moving direction of the second trolley by the universal dust hood.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (9)
1. A rust removing device for steel rails is characterized by comprising a first trolley, a plurality of laser generators, a smoke purifying device, a second trolley and a plurality of laser emitting devices;
the first trolley comprises a first trolley body and first wheels, and the first wheels are arranged at the bottom of the first trolley body and move along the steel rail; the first vehicle body is used for carrying a laser generator and a smoke purification device;
the laser generators are arranged on the first trolley, and each laser generator is provided with a resonant cavity and is used for generating laser;
the smoke purification device is arranged on the first trolley; the smoke purification device is provided with a centrifugal fan and is used for collecting waste gas and particles generated by rust removal;
the second trolley comprises a second trolley body, a second wheel and two mounting frames, wherein the second wheel is arranged at the bottom of the second trolley body and moves along the steel rail; the two mounting frames are fixedly arranged on the second vehicle body, extend to the steel rail and are distributed on two sides of the steel rail;
and two laser emitting devices are arranged on each mounting frame and are used for emitting laser and removing rust on the surface of the steel rail.
2. A rust removing apparatus as claimed in claim 1, wherein the two mounts are asymmetrically provided on both sides of the rail.
3. The rust removing apparatus as claimed in claim 1, wherein the rail includes a head, a web, and a foot, the web being located between the head and the foot; the laser emitting device is used for removing rust on the rail head or the rail web.
4. The rust removing apparatus as claimed in claim 1, wherein each of the mounting frames includes a first portion and a second portion, the first portion being fixedly coupled with the second vehicle body; the first part or the second part is in a bent shape and comprises a bottom plate and side plates positioned at two sides of the bottom plate; the bottom plate and the side plates on the two sides of the bottom plate form a groove structure, and the second part can be arranged in the groove structure of the first part;
a strip-shaped through hole is formed in the middle of the bottom plate of the first part or the second part; penetrating the second part into the groove structure of the first part, penetrating the bolt through the through holes of the first part and the second part, and penetrating the bottom plate of the first part and the bottom plate of the first part
The bottom plate of the second part is clamped and fixed, so that the first part and the second part are connected.
5. The rust removing device as claimed in claim 4, wherein the first laser emitter is used for performing laser rust removal on the surface of the rail head, and the second laser emitter is used for performing laser rust removal on the side surface of the rail web;
the laser emitting device arranged on the first portion of each mounting frame is a first laser emitting device, and the laser emitting device arranged on the second portion of each mounting frame is a second laser emitting device.
6. The rust removing apparatus as claimed in claim 5, wherein the distance between the second laser transmitter and the rail is adjusted by changing the length of the second portion penetrating into the first portion;
the distance between the first laser emitting device and the steel rail is adjusted by changing the installation position of the first laser emitting device along the direction of the first part.
7. The rust removing apparatus as claimed in claim 1, wherein the rust removing apparatus comprises at least four laser generators, one laser generator corresponding to each laser emitting device.
8. The rust removing apparatus as claimed in claim 1, wherein each laser generator is connected to a corresponding laser emitting device through an optical fiber for transmitting laser light.
9. The rust removing apparatus as claimed in claim 1, wherein the fume cleaning device comprises a universal dust hood having bellows, the universal dust hood extending toward the steel rail and collecting exhaust gas and particulate matter generated from the rust removal.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120555022.XU CN214656050U (en) | 2021-03-18 | 2021-03-18 | A rust cleaning device for rail |
| PCT/CN2022/078547 WO2022193939A1 (en) | 2021-03-18 | 2022-03-01 | Derusting device for steel rails |
| DE202022101411.6U DE202022101411U1 (en) | 2021-03-18 | 2022-03-17 | Rail rust removal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120555022.XU CN214656050U (en) | 2021-03-18 | 2021-03-18 | A rust cleaning device for rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214656050U true CN214656050U (en) | 2021-11-09 |
Family
ID=78454003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120555022.XU Active CN214656050U (en) | 2021-03-18 | 2021-03-18 | A rust cleaning device for rail |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN214656050U (en) |
| DE (1) | DE202022101411U1 (en) |
| WO (1) | WO2022193939A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022193939A1 (en) * | 2021-03-18 | 2022-09-22 | 中铁上海工程局集团(苏州)轨道交通科技研究院有限公司 | Derusting device for steel rails |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111098010A (en) * | 2020-01-13 | 2020-05-05 | 安徽理工大学 | Intelligent control device for cutting and processing truck base plate and use method thereof |
| CN115847002B (en) * | 2023-02-24 | 2023-06-30 | 泽高新智造(广东)科技有限公司 | Laser additive repairing method for steel rail bolt hole |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2004218654B2 (en) * | 1999-11-01 | 2006-06-08 | Laserthor Limited | Rail cleaning method and apparatus |
| CN202809417U (en) * | 2012-03-27 | 2013-03-20 | 武汉新瑞达激光工程有限责任公司 | On-line type steel rail laser processing vehicle |
| CN110820441A (en) * | 2018-08-10 | 2020-02-21 | 中国铁建高新装备股份有限公司 | Steel rail rust removing vehicle |
| CN109158761A (en) * | 2018-09-14 | 2019-01-08 | 睿雄金属制品（芜湖）有限公司 | A kind of away rust by laser machine |
| CN211471997U (en) * | 2019-11-11 | 2020-09-11 | 中铁第四勘察设计院集团有限公司 | Steel rail laser strengthening vehicle based on image recognition |
| CN214656050U (en) * | 2021-03-18 | 2021-11-09 | 中铁上海工程局集团有限公司 | A rust cleaning device for rail |
| CN112832076A (en) * | 2021-03-18 | 2021-05-25 | 中铁上海工程局集团有限公司 | Rust removal device and method for steel rail |
-
2021
- 2021-03-18 CN CN202120555022.XU patent/CN214656050U/en active Active
-
2022
- 2022-03-01 WO PCT/CN2022/078547 patent/WO2022193939A1/en active Application Filing
- 2022-03-17 DE DE202022101411.6U patent/DE202022101411U1/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022193939A1 (en) * | 2021-03-18 | 2022-09-22 | 中铁上海工程局集团(苏州)轨道交通科技研究院有限公司 | Derusting device for steel rails |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022193939A1 (en) | 2022-09-22 |
| DE202022101411U1 (en) | 2022-04-11 |
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