CN103015279A - High-speed grinding train for rails - Google Patents
High-speed grinding train for rails Download PDFInfo
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- CN103015279A CN103015279A CN2013100101879A CN201310010187A CN103015279A CN 103015279 A CN103015279 A CN 103015279A CN 2013100101879 A CN2013100101879 A CN 2013100101879A CN 201310010187 A CN201310010187 A CN 201310010187A CN 103015279 A CN103015279 A CN 103015279A
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- grinding
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- sanding
- frame
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- 238000000227 grinding Methods 0.000 title claims abstract description 67
- 238000005498 polishing Methods 0.000 claims description 85
- 239000003921 oil Substances 0.000 claims description 38
- 239000000428 dust Substances 0.000 claims description 33
- 229910001651 emery Inorganic materials 0.000 claims description 25
- 238000012544 monitoring process Methods 0.000 claims description 22
- 229910000997 High-speed steel Inorganic materials 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 9
- 239000010727 cylinder oil Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 230000000712 assembly Effects 0.000 abstract 2
- 238000000429 assembly Methods 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000003449 preventive effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses a high-speed grinding train for rails. The high-speed grinding train comprises a grinding operating train and grinding devices with grinding assemblies. Each grinding device further comprises a grinding frame, the grinding frame is a square frame, two U-shaped beams are opposite to each other and are integrally connected with each other by short crossbeams to form the square frame, two ends of each short crossbeam are connected with the U-shaped beams by hinge pins, the short crossbeams can slide up and down along the hinge pins, the two grinding assemblies of the grinding device are parallelly mounted in the grinding frame, two ends of each rotary frame are rotatably connected with the grinding frame, at least one end of each rotary frame is provided with a rotation driving device, the upper portion of the grinding frame is hinged with the bottom of a carriage of the grinding operating train by a lift cylinder, and support wheels are mounted on the lower portion of the grinding frame. The high-speed grinding train is high in stability, and can meet grinding requirements of various roads, skylight operation is omitted, a grinding procedure is controllable and adjustable, full surfaces of the rails can be ground, and the high-speed grinding train is safe and environment-friendly.
Description
Technical field
The invention belongs to the railway maintenance equipment technical field, particularly relate to a kind of high-speed steel rail polishing train for the railway track preventive grinding.
Background technology
Steel rail grinding is the contact fatigue of a kind of undulatory wear of eliminating rail and control rail, prevents from scaling off because contact fatigue produces, the Main Means of the disease such as cracking, and major way has corrective polishing, maintainability polishing and preventive grinding.For a long time, mainly rely on low speed polishing train and milling train to realize steel rail grinding.But, along with Beijing-Shanghai High-Speed Railway is opened the rail corrugation that occurs after the operation and the spring phenomenon that fractures, reflect that only relying on conventional low speed polishing train to come that rail in high speed railway is carried out preventive grinding can not meet the demands, existing grinding machine needs the Window time operation mostly simultaneously, the impact operation, the sanding apparatus position of working vehicle is non-adjustable, causes turning and climbing place sanding belt position sideslip; The polishing attitude is non-adjustable, can't realize the full track face polishing of rail; Without real-time monitoring system,, no record uncontrollable to bruting process; Without iron filings, spark gathering system, not only cause environment pollution, and easily cause fire.
Summary of the invention
Purpose of the present invention is exactly the problem that exists for above-mentioned prior art, and a kind of skylight operation that need not is provided, and bruting process is controllable, can realize the high-speed steel rail polishing train of the polishing of full track face and safety and environmental protection.
Purpose of the present invention realizes by following technical proposals:
A kind of high-speed steel rail polishing train, comprise polishing operation car and the sanding apparatus with sanding component, this sanding component is mainly by grinding wheel component, the emery wheel supporting base, supporting base installing plate and rotating frame consist of, grinding wheel component is loaded on the emery wheel supporting base, the emery wheel supporting base is installed on the supporting base installing plate, the supporting base installing plate snaps in rotating frame, sanding apparatus also comprises sanding frame, this sanding frame is the quadra that is oppositely arranged and is connected as one by tail trimmer by two U-shaped beams, the two ends of tail trimmer connect U-shaped beam by bearing pin, and tail trimmer can slide up and down along bearing pin, two sanding components of parallel installation in sanding frame, two ends and the sanding frame of rotating frame are rotatably connected, and at least one end arranges rotating driving device, sanding frame top is hinged by the car bottom of hoist cylinder and polishing operation car, and the sanding frame bottom is equipped with support wheel.
This structure is in parallel with two groups of sanding components, can polish simultaneously two one steel rails of railway, two U-shaped beams of sanding frame can vertically relatively move, thereby adapt to the discrepancy in elevation and the inconsistent operating mode of interior outer radius of both sides, track turning rail, avoid sanding belt position sideslip.The hoist cylinder two ends are hinged, so polishing operation is when the bend, and hoist cylinder can swing and automatically adapt to rail sanding apparatus is not beated at rail polishing position stability.
Further, attitude coutrol mechanism all is equipped with at the sanding component two ends, it mainly is made of the axle of having strong market potential, long connecting rod, adjustment oil cylinder, pressurization oil cylinder, curved rod, junction plate and short connecting rod, junction plate is fixed on the rotating frame end, junction plate, short connecting rod, long connecting rod, sanding frame, curved rod be hinged formation five-bar mechanism successively, the hinge that the axle of having strong market potential passes short connecting rod and long connecting rod connects together the attitude coutrol mechanism at two ends, adjust oil cylinder and be articulated between short connecting rod and the long connecting rod, the pressurization oil cylinder is articulated between curved rod and the sanding frame.
Regulate angle and the position of control grinding wheel component by the adjustment oil cylinder of attitude coutrol mechanism, thereby realize the needs of each position of rail grinding face; By the pressurization oil cylinder grinding wheel component is pressurizeed, guarantee the pressure that the grinding wheel component grinding needs.
Further, car bottom at the polishing operation car vertically is provided with some guide strips, form the polishing installation portion between adjacent two guide strips, sanding apparatus is installed in this polishing installation portion, offer vertical gathering sill on the guide strip, be provided with position limiting slide block at the sanding frame two ends, position limiting slide block and gathering sill coupling.
This structure can guarantee the stability of sanding apparatus when being moved up and down by the hoist cylinder drive, and avoids double swerve when polishing operation.
Further, at the car bottom of polishing operation car four groups of sanding apparatus are installed successively, each organizes the different position, grinding wheel component rail grinding cross section of sanding apparatus, and the polishing position of respectively organizing sanding apparatus covers whole positions, rail section after mutually superposeing fully.
Further, on the polishing operation car, also be provided for responding to the sensor of hoist cylinder and pressurization oil cylinder oil pressure, and accept sensor signal and control hoist cylinder and the controller of pressurization oil cylinder oil pressure.
The oil pressure of this structure lifting controllable oil cylinder and pressurization oil cylinder, sensor collects the oil pressure data of hoist cylinder and pressurization oil cylinder, and be sent to controller, controller is with oil pressure value and the contrast of predefined standard oil pressure value range, as exceed this standard oil pressure value range, then controller control is to hoist cylinder, the oil transportation of pressurization oil cylinder, until oil pressure value is in standard oil pressure value range.Therefore, when about track injustice or front and back not at ordinary times, hoist cylinder can automatic telescopic be adjusted oil cylinder length, makes support wheel compress all the time rail.The pressurization oil cylinder makes grinding wheel component compress all the time rail, guarantees the pressure that grinding needs.
Further, on the polishing operation car, also be provided with dust-precipitating system, this dust-precipitating system comprises control of dust pipeline, induced draft fan, dust collecting container, the control of dust pipeline is installed in the car bottom both sides, control of dust pipeline one end is dust collecting opening, and this dust collecting opening is over against the polishing position of grinding wheel component to rail, and the control of dust pipeline other end accesses dust collecting container, be provided with filter in dust collecting container, induced draft fan is installed in the control of dust pipeline.
When the sanding apparatus rail grinding, the iron filings of generation, spark are inhaled into the control of dust pipeline and send in the dust collecting container under the effect of induced draft fan, filter with iron dust filtration after, remaining gas enters atmosphere, is conducive to environmental protection, eliminates disaster hidden-trouble.
Further, the monitoring task car of connecting with the polishing operation car is installed the camera that is used for monitoring polishing situation at the polishing operation car, is provided with monitoring display screen at the monitoring task car.
To polishing real-time process monitoring and omnidistance record, can in time notify maintenance personal keep in repair as finding the failure monitoring personnel by camera and monitoring display screen, avoid causing more serious fault.
Further, the polishing operation car is provided with the emery wheel part warehouse, is provided with top gem of a girdle-pendant crane manipulator in the emery wheel part warehouse.
Deposit grinding wheel component for subsequent use in the emery wheel part warehouse, after the grinding wheel component wearing and tearing, the grinding wheel component that the convenient for maintaining personnel in time more renew.Top gem of a girdle-pendant crane manipulator can be carried grinding wheel component easily, saves manpower, and efficient is high.
Compared with prior art, beneficial effect of the present invention is:
1. this polishing train two one steel rails of railway of can polishing simultaneously, and two sanding components are linked together reliably, the demand of various highway sections polishing can be adapted to, and stability is better;
2. on the sanding apparatus attitude coutrol mechanism is housed, can adjusts the relative position of grinding wheel component and rail, easily satisfy each position of polishing rail level, easy to operate, by pressurization oil cylinder press grinding wheel component, guarantee the pressure of wheel grinding necessity, control convenient and reliable;
3. have dust-precipitating system, iron filings, the spark that polishing can be produced enters atmosphere after collecting and filtering, and is beneficial to environmental protection, eliminates disaster hidden-trouble;
4. series connection monitoring task car to polishing real-time process monitoring and omnidistance record, finds that in time fault keeps in repair;
5. have efficient polishing operation efficient, directly insert polishing train number according to the timetable arrangement of local Railway Bureau, need not offer separately the skylight point, can effectively improve the railway transport economy benefit.
Description of drawings
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is the structural representation of sanding apparatus of the present invention;
Fig. 3 is the top view of Fig. 2;
Fig. 4 is the side structure schematic diagram of sanding apparatus of the present invention;
Fig. 5 is the structural representation of dust-precipitating system of the present invention;
Fig. 6 is the schematic diagram that the present invention respectively organizes grinding wheel component polishing position.
The specific embodiment
The present invention is further illustrated below in conjunction with specific embodiments and the drawings.
Such as Fig. 1 to shown in Figure 6, a kind of high-speed steel rail polishing train comprise series connection power buggy 1, monitoring task car 2, the polishing operation car 3 of sanding apparatus 4 is housed, sanding apparatus 4 can four assembly close use, is installed in 8 bottoms, compartment of polishing operation car 3.At polishing operation car 3 camera that is used for monitoring polishing situation is installed, is provided with monitoring display screen at monitoring task car 2.Also be provided with the emery wheel part warehouse on the polishing operation car 3, in the emery wheel part warehouse, be provided with top gem of a girdle-pendant crane manipulator.
As shown in Figures 2 and 3, sanding apparatus 4 comprises sanding component 5 and sanding frame 6, sanding component 5 mainly is made of grinding wheel component 51, emery wheel supporting base 52, supporting base installing plate 53, rotating frame 54, grinding wheel component 51 is pressed in the V-type groove of emery wheel supporting base 52 by compressed oil cylinder, each emery wheel vertically becomes 40 ° of angles with emery wheel supporting base 52, each emery wheel supporting base 52 can be installed three emery wheels, the mode of this hydraulic clamping emery wheel, operation safe, convenience; Emery wheel supporting base 52 usefulness bolts are installed on the supporting base installing plate 53, and each supporting base installing plate 53 can be installed four emery wheel supporting bases 52; Supporting base installing plate 53 snaps in rotating frame 54; Sanding frame 6 is the quadras that are oppositely arranged and connected as one by tail trimmer 62 by two U-shaped beams 61, the two ends of tail trimmer 62 connect U-shaped beam 61 by bearing pin 20, and tail trimmer 62 can slide up and down along bearing pin 20, two sanding components 5 of parallel installation in sanding frame 6, two ends and the sanding frame 6 of the rotating frame 54 of sanding component 5 are rotatably connected, and two ends arrange rotation motor 7, sanding frame 6 tops are by compartment 8 bottom-hinged of hoist cylinder 9 with polishing operation car 3, and sanding frame 6 bottoms are equipped with support wheel 10.
As shown in Figure 4, at sanding component 5 two ends attitude coutrol mechanism 11 is housed, it is mainly by the axle 1107 of having strong market potential, long connecting rod 1101, adjust oil cylinder 1105, pressurization oil cylinder 1106, curved rod 1104, junction plate 1103 and short connecting rod 1102 consist of, junction plate 1103 is fixed on rotating frame 54 ends, junction plate 1103, short connecting rod 1102, long connecting rod 1101, sanding frame 6, curved rod 1104 is hinged formation five-bar mechanism successively, the hinge that the axle 1107 of having strong market potential passes short connecting rod 1102 and long connecting rod 1101 connects together the attitude coutrol mechanism 11 at two ends, adjust oil cylinder 1105 and be articulated between short connecting rod 1102 and the long connecting rod 1101, pressurization oil cylinder 1106 is articulated between curved rod 1104 and the sanding frame 6.
8 bottoms, compartment at polishing operation car 3 vertically are provided with some guide strips 12, form the polishing installation portion between adjacent two guide strips 12, sanding apparatus 4 is installed in this polishing installation portion, offer vertical gathering sill on the guide strip 12, be arranged with 2 pairs of position limiting slide blocks 13 at sanding frame 6 two ends, position limiting slide block 13 and gathering sill coupling.
As shown in Figure 6,8 bottoms, compartment at polishing operation car 3 are equipped with four groups of sanding apparatus 4 successively, be respectively sanding apparatus one to 4 401,402,403,404, adjust the position of respectively organizing sanding apparatus by attitude coutrol mechanism 11, thereby make a position of sanding apparatus one 401 rail grindings 14, the b position of sanding apparatus 2 402 rail grindings 14, the c position of sanding apparatus 3 403 rail grindings 14, the d position of sanding apparatus 4 404 rail grindings 14, sanding apparatus one to 4 401,402,403,404 polishing position a, b, c, after superposeing mutually, d covers whole positions, rail section fully.Grinding wheel component 51 is provided with position sensor, and position sensor passes to controller with the position signalling of emery wheel, and controller control attitude coutrol mechanism 11 is adjusted the position of sanding component 5.
On polishing operation car 3, also be provided for responding to the sensor of hoist cylinder 9 and pressurization oil cylinder 1106 oil pressure, and accept sensor signal and control hoist cylinder 9 and the controller of pressurization oil cylinder 1106 oil pressure.
As shown in Figure 5, on polishing operation car 3, also be provided with dust-precipitating system, this dust-precipitating system comprises control of dust pipeline 15, induced draft fan 16, dust collecting container 17, control of dust pipeline 15 is installed in compartment 8 two bottom sides, and dust collecting container 17 is arranged in the emery wheel part warehouse, and control of dust pipeline 15 1 ends are dust collecting opening, this dust collecting opening is over against the polishing position of 51 pairs of rail 14 of grinding wheel component, control of dust pipeline 15 other ends access dust collecting container 17 is provided with filter 18 in dust collecting container 17, induced draft fan 16 is installed in the control of dust pipeline 15.
When operation, insert this high-speed steel rail polishing train according to the timetable arrangement of local Railway Bureau, need not offer separately the skylight point, the polishing train is pressed the operation of 60-80km/h speed, hoist cylinder 9 control sanding apparatus 4 moves down along gathering sill, support wheel 10 is pressed on the rail 14, under the effect of attitude coutrol mechanism 11, adjust grinding wheel component 51 to the position angle of needs and be pressed on the track 14, grinding wheel component 51 passive High Rotation Speed under the dragging of train begins rail grinding 14, the iron filings that produce in the bruting process, spark enters atmosphere after collecting filtration by dust-precipitating system.
Camera is taken in real time to bruting process, the monitor staff by the monitoring display screen on the monitoring task car to the polishing real-time process monitoring.After 51 wearing and tearing of one group of grinding wheel component, hoist cylinder 9 rises to home with sanding apparatus 4, and then rotation motor 7 drives rotating frame 54 rotations, changes rapidly one group of new grinding wheel component 51, again falls sanding apparatus 4, can realize the high-speed and continuous polishing.After all grinding wheel components 51 all wear and tear, utilize top gem of a girdle-pendant crane manipulator from the emery wheel part warehouse, to take out new grinding wheel component, can continue polishing after manually changing.
This polishing operation car thickness 0.02-0.08mm that once can polish can realize the preventative high speed polishing operation of total cross-section of rail by 3-6 time polishing.
Also can by the many groups of series connection monitoring task car 2, polishing operation car 3, realize once by the preventative high speed polishing operation of the total cross-section of namely finishing rail 14.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. high-speed steel rail polishing train, comprise polishing operation car and the sanding apparatus with sanding component, this sanding component is mainly by grinding wheel component, the emery wheel supporting base, supporting base installing plate and rotating frame consist of, grinding wheel component is loaded on the emery wheel supporting base, the emery wheel supporting base is installed on the supporting base installing plate, the supporting base installing plate snaps in rotating frame, it is characterized in that: sanding apparatus also comprises sanding frame, this sanding frame is the quadra that is oppositely arranged and is connected as one by tail trimmer by two U-shaped beams, the two ends of tail trimmer connect U-shaped beam by bearing pin, and tail trimmer can slide up and down along bearing pin, two sanding components of parallel installation in sanding frame, two ends and the sanding frame of rotating frame are rotatably connected, and at least one end arranges rotating driving device, sanding frame top is hinged by the car bottom of hoist cylinder and polishing operation car, and the sanding frame bottom is equipped with support wheel.
2. high-speed steel rail polishing train according to claim 1, it is characterized in that: attitude coutrol mechanism all is equipped with at the sanding component two ends, it is mainly by the axle of having strong market potential, long connecting rod, adjust oil cylinder, the pressurization oil cylinder, curved rod, junction plate and short connecting rod consist of, junction plate is fixed on the rotating frame end, junction plate, short connecting rod, long connecting rod, sanding frame, curved rod is hinged formation five-bar mechanism successively, the hinge that the axle of having strong market potential passes short connecting rod and long connecting rod connects together the attitude coutrol mechanism at two ends, adjust oil cylinder and be articulated between short connecting rod and the long connecting rod, the pressurization oil cylinder is articulated between curved rod and the sanding frame.
3. high-speed steel rail polishing train according to claim 2, it is characterized in that: the car bottom at the polishing operation car vertically is provided with some guide strips, form the polishing installation portion between adjacent two guide strips, sanding apparatus is installed in this polishing installation portion, offer vertical gathering sill on the guide strip, be provided with position limiting slide block at the sanding frame two ends, position limiting slide block and gathering sill coupling.
4. high-speed steel rail polishing train according to claim 3, it is characterized in that: the car bottom at the polishing operation car is equipped with four groups of sanding apparatus successively, each organizes the different position, grinding wheel component rail grinding cross section of sanding apparatus, and the polishing position of respectively organizing sanding apparatus covers whole positions, rail section after mutually superposeing fully.
5. high-speed steel rail polishing train according to claim 1, it is characterized in that: on the polishing operation car, also be provided for responding to the sensor of hoist cylinder and pressurization oil cylinder oil pressure, and accept sensor signal and control hoist cylinder and the controller of pressurization oil cylinder oil pressure.
6. high-speed steel rail polishing train according to claim 1, it is characterized in that: on the polishing operation car, also be provided with dust-precipitating system, this dust-precipitating system comprises control of dust pipeline, induced draft fan, dust collecting container, the control of dust pipeline is installed in the car bottom both sides, control of dust pipeline one end is dust collecting opening, and this dust collecting opening is over against the polishing position of grinding wheel component to rail, and the control of dust pipeline other end accesses dust collecting container, be provided with filter in dust collecting container, induced draft fan is installed in the control of dust pipeline.
7. high-speed steel rail polishing train according to claim 1 is characterized in that: the monitoring task car of connecting with the polishing operation car, at the polishing operation car camera that is used for monitoring polishing situation is installed, and be provided with monitoring display screen at the monitoring task car.
8. high-speed steel rail polishing train according to claim 1, it is characterized in that: the polishing operation car is provided with the emery wheel part warehouse, is provided with top gem of a girdle-pendant crane manipulator in the emery wheel part warehouse.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310010187.9A CN103015279B (en) | 2013-01-11 | 2013-01-11 | High-speed grinding train for rails |
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| CN201310010187.9A CN103015279B (en) | 2013-01-11 | 2013-01-11 | High-speed grinding train for rails |
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| CN103015279B CN103015279B (en) | 2014-09-10 |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103911926A (en) * | 2014-04-22 | 2014-07-09 | 北京二七机车工业有限责任公司 | Steel rail polishing vehicle |
| CN104562876A (en) * | 2014-12-26 | 2015-04-29 | 北京二七轨道交通装备有限责任公司 | Steel rail polishing device and steel rail milling grinding machine |
| CN105945686A (en) * | 2016-05-31 | 2016-09-21 | 徐海慧 | Railway rust removing device |
| CN106592354A (en) * | 2016-12-28 | 2017-04-26 | 中车北京二七机车有限公司 | Steel rail milling and grinding vehicle |
| CN109577119A (en) * | 2019-01-14 | 2019-04-05 | 成都中轨轨道设备有限公司 | A kind of railroad maintenance with can multi-faceted work mobile rail derusting device |
| CN109629355A (en) * | 2019-01-11 | 2019-04-16 | 成都中轨轨道设备有限公司 | A kind of self-propelled derusting grinding device of the railway maintenance with dedusting function |
| CN109958723A (en) * | 2017-12-22 | 2019-07-02 | 中车北京二七机车有限公司 | Clutch and rail grinding train for rail grinding train |
| CN109958010A (en) * | 2017-12-22 | 2019-07-02 | 中车北京二七机车有限公司 | Rail grinding machine |
| CN110284381A (en) * | 2019-07-08 | 2019-09-27 | 苏州睿友智能装备有限公司 | A kind of robot steel rail grinding device of hydraulic-driven |
| CN110528344A (en) * | 2019-10-16 | 2019-12-03 | 中国国家铁路集团有限公司 | A kind of polishing rack |
| CN110565461A (en) * | 2019-10-16 | 2019-12-13 | 中国国家铁路集团有限公司 | Grinding vehicle |
| CN110886270A (en) * | 2019-11-29 | 2020-03-17 | 济南轨道交通集团有限公司 | Railway track cleaning and maintaining device |
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| CN112746535A (en) * | 2021-02-03 | 2021-05-04 | 柳州市铁发科技有限公司 | Steel rail polishing device marked by label and polishing method |
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| CN115075069A (en) * | 2022-06-23 | 2022-09-20 | 河北喆速科技有限公司 | Grinding device and grinding wagon with same |
| CN115418899A (en) * | 2022-08-12 | 2022-12-02 | 四川西南交大铁路发展股份有限公司 | High-speed grinding trolley for urban rail transit rails |
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