CN109421544A - A kind of method and apparatus that the speed regulation of electric train collector system pantagraph current collector reduces abrasion - Google Patents
A kind of method and apparatus that the speed regulation of electric train collector system pantagraph current collector reduces abrasion Download PDFInfo
- Publication number
- CN109421544A CN109421544A CN201710738268.9A CN201710738268A CN109421544A CN 109421544 A CN109421544 A CN 109421544A CN 201710738268 A CN201710738268 A CN 201710738268A CN 109421544 A CN109421544 A CN 109421544A
- Authority
- CN
- China
- Prior art keywords
- current collector
- pantagraph current
- speed
- train
- pantagraph
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/26—Rail vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The present invention relates to electric train collector system technical field, specially a kind of method and apparatus for reducing contact net lines or conductor rail, pantagraph current collector abrasion solve the problems, such as that pantagraph current collector in the prior art and contact net lines or conductor rail quick abrasion, abrasion accumulation are big.In train operation, pantagraph current collector is with respect to train movement velocity following train speed real-time change, make the movement velocity of pantagraph current collector contact net lines opposite with contact net lines or conductor rail contact site or conductor rail close to zero or very little, the abrasion of pantagraph current collector and contact net lines or conductor rail is greatly reduced；Using pantagraph current collector end diameter more times of structure smaller than outside diameter, the abrasion of pantagraph current collector and conduction brush is greatly reduced；Structure, minor diameter conducting sphere and the sphere-contact being overlapped using pantagraph current collector spherical pore line of symmetry with pantagraph current collector axis reduce abrasion method, and the abrasion of pantagraph current collector and conducting sphere is greatly reduced.The abrasion of electric train collector system and contact net lines or conductor rail can be greatly lowered in the present invention.
Description
Technical field
The present invention relates to electric train collector system technical fields.
Background technique
Collector system is that electric train and traction substation realize the permutable medium of electricity, can be divided into pantograph and connect with aerial
Net-fault system, pantograph and aerial conductor rail system and stream shoes and conductor rail system are taken, occupied very in electric railway system
Consequence.In the current loop of railway traction power supply system, pantograph or take stream shoes be mobile device, make somebody a mere figurehead contact
Perhaps conductor rail is relative motion between the slide plate of fixation means pantograph and contact line (or taking stream shoes and conductor rail) to net,
Slide plate and abrasion of contact wire (stream shoes and conductor rail is taken to wear), cause to consume a large amount of slide plates, contact net lines and spend a large amount of maintenances
Expense is continuously increased as electric train speed is continuously improved with railway, subway line, and this problem is more and more prominent.Currently,
Either contact net lines and pantagraph current collector all use sliding contact in the collector system of railway, subway electric train, generally use cunning
Plate is contacted with contact net lines, and slide plate is almost equal along contact line movement velocity and electric train speed, and skimming wear is big, mill
Damage amount and sliding speed are closely related, and relationship is complicated, it is difficult to abrasion is effectively reduced or controlled according to speed.Since slide plate edge connects
Net-fault line movement velocity and electric train speed are almost equal, and abrasion is whole abrasion between each other, and wear cumulation amount is very big.
It reduces abrasion major technique at present or method is the slide plate using various wear-resistant materials, but effect is limited by material property, it is resistance to
It is limited to grind effect, while the abrasion of contact line is still, without substantial reduction.
Summary of the invention
To overcome the above disadvantages, the purpose of the present invention is to provide a kind of reduction contact net lines or conductor rails and pantagraph current collector
The method and apparatus worn between (the suitable slide plate of function) solve electric train collector system pantagraph current collector and contact in the prior art
Cable or conductor rail quick abrasion wear the big problem of accumulation.
The technical scheme is that a kind of electric train collector system pantagraph current collector speed regulation reduces the method and dress of abrasion
It sets, device includes variable speed driver, pantagraph current collector, motor governing system, train running speed measuring system, conduction brush, conducting sphere, leads
Voltage block, current collection base, control system etc..The pantagraph current collector is by the high material manufacture of electric conductivity at two sections of cylindrical bodies or open circles
Cylinder, a segment length are L1, diameter D1, contacted in electric train operation with contact net lines or conductor rail contact；Another segment length
Degree is L2, diameter D2, diameterIt is mounted on current collection base, pantagraph current collector electric current is flowed into current collection base, forms conductive electricity
Road.The pantagraph current collector small end is mounted on current collection base by conduction brush, conduction brush and pantagraph current collector small end Cylindrical Surfaces Contact, contact circle
The diameter of cylinder is equal to pantagraph current collector small end body diameter D2；Conduction brush is fixed in brush carrier, and brush carrier is fixed on current collection base, by
It flows device electric current and flows into current collection base, form conducting channel.It is SR spherical pore, the spherical pore centre of sphere that the pantagraph current collector small end, which opens a diameter,
On pantagraph current collector axis, spherical pore symmetrical center line is overlapped with pantagraph current collector axis, and spherical bore dia SR is less than or equal to 15mm, ball
Shape bore dia SR is less than D2, spherical pore depth H1=0.25-0.35SR fills the conducting sphere that a diameter is SR in spherical pore, leads
The other end of electric ball is compressed with one piece of conductive briquetting, and conductive briquetting is SR spherical pore by pressing one end of conducting sphere to open a diameter,
As pantagraph current collector small end spherical shape pore size, conducting sphere is pressed in conductive briquetting spherical pore the size of conductive briquetting spherical pore, is led
Voltage block is mounted on afflux seat, and pantagraph current collector electric current is flowed into current collection base, forms conducting channel.A kind of electric train current collection
The method that the speed regulation of system pantagraph current collector reduces abrasion is that variable speed driver drives pantagraph current collector movement, and speed is measured according to train running speed
The train running speed that system obtains in real time adjusts in real time, makes the number of speed of pantagraph current collector and contact net lines or conductor rail contact site
It is worth certain poor, the absolute value of the difference between 0-10m/s (including absolute value of the difference is zero) of or holding equal with train speed numerical value,
Directional velocity and train speed on the contrary, pantagraph current collector and contact net lines or conductor rail contact site relative to stationary reference frame (such as:
Contact net lines referential) speed (absolute velocity) be equal to zero or control in a certain range, the absolute value of speed 0-10m/s it
Between (absolute value including speed is zero).
Preferably, the pantagraph current collector and contact net lines or conductor rail contact site relative to stationary reference frame (such as: contact
Cable referential) speed (absolute velocity) close to zero.
Preferably, the diameter of the pantagraph current collector small end is 15mm-25mm.
Preferably, the diameter of the pantagraph current collector spherical pore and conductive bulb diameter are 10mm-15mm.
The present invention drives pantagraph current collector movement when electric train is run, according to train running speed variable speed driver, adjusts in real time
The speed of whole pantagraph current collector and contact net lines or conductor rail contact site, makes pantagraph current collector and contact net lines or conductor rail contact site phase
To the movement velocitys of contact net lines close to zero or very little, the abrasion of pantagraph current collector and contact net lines or conductor rail is greatly reduced；It answers
With pantagraph current collector end diameter more times of structure smaller than outside diameter, more times of ground reduction pantagraph current collector small ends are cut with conduction brush contact surface
The abrasion of pantagraph current collector and conduction brush is greatly reduced in linear velocity；It is overlapped by pantagraph current collector spherical pore line of symmetry with pantagraph current collector axis
Structure and minor diameter conducting sphere, control conducting sphere and pantagraph current collector spherical pore contact face velocity, using sphere-contact reduce wear
Method, the abrasion of pantagraph current collector and conducting sphere is greatly reduced；Reduce collector system mill in electric train operation to reach
The purpose of damage.The present invention can be designed manufacture on the basis of existing collector system can reach electric train and subtract at runtime
Less wear purpose, structure is simple, on electric train other performances substantially without influence, is easy to implement, material is easy to obtain.
Detailed description of the invention
Fig. 1 schematic illustration
The speed regulation of Fig. 2 electric train collector system pantagraph current collector reduces the method and apparatus schematic three dimensional views of abrasion.
Fig. 3 pantagraph current collector and conduction brush structural schematic diagram.
Fig. 4 pantagraph current collector, conducting sphere, conductive pressing plate structural schematic diagram.
Specific embodiment
Illustrate a specific embodiment of the invention below in conjunction with attached drawing.
Fig. 1 show the principle of the present invention schematic diagram, and contact net lines or conductor rail are static, a certain moment, electric train fortune
Dynamic speed V0, directional velocity is diagram right direction, and pantagraph current collector opposite electric train speed on electric train is V1, speed side
To illustrate left direction, with electric train directional velocity on the contrary, the opposite contact net lines of pantagraph current collector or conductor rail (stationary reference
System) speed be V=V0-V1.The principle of the present invention is exactly to measure electric train movement velocity V in real time0, pantagraph current collector is adjusted in electricity
Opposite electric train speed is V on gas train1, make pantagraph current collector with respect to contact net lines or the speed V of conductor rail (stationary reference frame)
Close to zero or very little, transport electric train each moment pantagraph current collector during whole service with respect to contact net lines or conductor rail
Dynamic speed is close to zero or very little, and according to fretting wear rule, such pantagraph current collector and contact net lines or conductor rail wear very little.
Fig. 2 show the method and apparatus schematic three dimensional views that the speed regulation of electric train collector system pantagraph current collector reduces abrasion, figure
Middle label 1 is variable speed driver, and figure label 2 is pantagraph current collector, and figure label 3 is contact net lines or conductor rail, and figure label 4 is
Conduction brush, figure label 5 are conducting sphere, and figure label 6 is conductive pressing plate, and figure label 7 is current collection base.Whole device mainly by
Variable speed driver, pantagraph current collector, motor governing system, train running speed measuring system, conduction brush, conducting sphere, conductive pressing plate, current collection
The composition such as seat, control system.Variable speed driver is mounted on the base of elevating mechanism one end, and pantagraph current collector one end is installed by connecting element
In variable speed driver rotation axis, the other end is mounted on current collection base.
Label 2 is pantagraph current collector in Fig. 2, manufactures into two sections of cylindrical bodies or hollow cylinder with the high material of electric conductivity, one
Segment length is L1, diameter D1, contacted in electric train operation with contact net lines or conductor rail；Another segment length is L2, directly
Diameter is D2, diameterIt is mounted on current collection base, pantagraph current collector electric current is flowed into current collection base, forms conducting channel.
Shown in Fig. 3, pantagraph current collector small end is mounted on current collection base by conduction brush, and conduction brush connects with pantagraph current collector small end cylindrical surface
Touching, contact surface are made into cylindrical surface, and the diameter on cylindrical surface is equal to pantagraph current collector small end body diameter D2；Pass through elastic element or air valve etc.
Pressure is applied to conduction brush, pressure needs to keep in a certain range, to remain conduction brush with pantagraph current collector and contact, brush is solid
In brush carrier, brush carrier is fixedly mounted on current collection base for Dingan County, forms conducting channel.
Shown in Fig. 4, the small end structure of pantagraph current collector, figure label 2 is pantagraph current collector, and figure label 5 is conducting sphere, figure label 6
For conductive pressing plate, it is SR spherical pore that 2 small end of pantagraph current collector, which processes a diameter, and the spherical pore centre of sphere must be positioned at pantagraph current collector axis
On, and spherical pore symmetrical center line must be overlapped with pantagraph current collector axis, and spherical bore dia SR is less than or equal to 15mm, spherical pore
Diameter SR is less than D2, spherical pore depth H1=0.25-0.35SR installs the conducting sphere 5 that a diameter is SR in spherical pore, leads
Electric ball need to be manufactured into the high material of electric conductivity, and the other end of conducting sphere is compressed with one piece of conductive briquetting 6, and compressing mode can be with
Pressure mode is applied using elastic element or air valve etc., pressure needs to keep in a certain range, and conductive briquetting need to use electric conductivity
Material manufacture that can be high is in conductive briquetting by pressing one end of conducting sphere to open a diameter as SR spherical pore, conductive briquetting is spherical
The size in hole is as pantagraph current collector small end spherical shape pore size, and conducting sphere is pressed in conductive briquetting spherical pore, and conductive briquetting is mounted on
On afflux seat, conducting channel is formed.
Pantagraph current collector is driven by variable speed driver, and motor governing system is according to train running speed measuring system or reads system reality
When obtain train speed to adjust motor rotary speed, between control and adjustment pantagraph current collector and contact net lines or conductor rail contact site absolutely
To speed (relative to stationary reference frame), absolute velocity between pantagraph current collector and contact net lines or conductor rail contact site is made to be equal to zero
Or it controls in a certain range, the absolute value of speed (absolute value including speed is zero), train running speed between 0-10m/s
Measuring system data noise requires within 2m/s, and control system regulates and controls pantagraph current collector and contact net lines or conductor rail contact portion
The speed of the opposite train reference system in position, velocity error require within 2m/s.
Claims (6)
1. a kind of method and apparatus that the speed regulation of electric train collector system pantagraph current collector reduces abrasion, which is characterized in that pantagraph current collector
(note: the suitable slide plate of function, collector shoe) is mounted on electric train to be contacted with contact net lines or conductor rail, and pantagraph current collector is ON TRAINS
Movement velocity direction and the train direction of motion of movement, pantagraph current collector and contact net lines or conductor rail contact site on the contrary, speed with
With train running speed real-time change and controllable；The movement velocity for controlling pantagraph current collector makes pantagraph current collector and contact net lines or connects
Rail-engaging contact site is equal with train speed numerical value with respect to the speed of train reference system or keeps certain poor, and absolute value of the difference is in 0-
Between 10m/s (including absolute value of the difference is zero), pantagraph current collector and contact net lines or conductor rail contact site are relative to stationary reference
The speed (absolute velocity) of system (such as: contact net lines or conductor rail referential) be equal to zero or control in a certain range, speed
Absolute value (absolute value including speed is zero) between 0-10m/s.
2. a kind of method and apparatus that the speed regulation of electric train collector system pantagraph current collector reduces abrasion as described in claim 1,
Be characterized in that: device is by pantagraph current collector, variable speed driver (such as motor, hydraulic motor etc.), motor governing system, train running speed
Measuring system (can directly apply electric train velocity measuring system), conduction brush, conducting sphere, conductive briquetting, current collection base, control
The composition such as system；Pantagraph current collector is manufactured by the high material of electric conductivity into cylindrical body or hollow cylinder, is mounted on variable speed driver
In shaft, variable speed driver drives pantagraph current collector movement, and speed obtains train operation speed according to train running speed measuring system in real time
Degree adjustment in real time, makes the speed and train speed number of pantagraph current collector train reference system opposite with contact net lines or conductor rail contact site
It is worth equal or holding certain poor, absolute value of the difference (including absolute value of the difference is zero), directional velocity and train between 0-10m/s
Speed on the contrary, pantagraph current collector and contact net lines or conductor rail contact site relative to the speed of stationary reference frame be equal to zero or control exist
A certain range, the absolute value of speed (absolute value including speed is zero) between 0-10m/s.
3. such as a kind of method and apparatus that the speed regulation of electric train collector system pantagraph current collector reduces abrasion claimed in claims 1-2,
It is characterized by: pantagraph current collector is manufactured by the high material of electric conductivity into two sections of cylindrical bodies or hollow cylinder, a segment length is
L1, diameter D1, referred to as big end contacts in electric train operation with contact net lines or conductor rail；Another segment length is L2,
Diameter is D2, diameterReferred to as small end is mounted on current collection base, pantagraph current collector electric current is flowed into current collection base, formation is led
Circuit.
4. the method and apparatus that a kind of electric train collector system pantagraph current collector speed regulation as described in claim 1-3 reduces abrasion,
It is characterized by: pantagraph current collector small end is mounted on current collection base by conduction brush, conduction brush and pantagraph current collector small end Cylindrical Surfaces Contact are led
Brush contact susface is cylindrical surface, and diameter is equal to pantagraph current collector small end body diameter D2, by applying pressure, make conduction brush and flowed
Device remains contact, and brush is fixed in brush carrier, and brush carrier is fixed on current collection base, and pantagraph current collector electric current is flowed into current collection base, shape
At conducting channel.
5. the method and apparatus that a kind of electric train collector system pantagraph current collector speed regulation as described in claim 1-3 reduces abrasion,
It is characterized by: it is SR spherical pore that pantagraph current collector small end, which opens a diameter, for the spherical pore centre of sphere on pantagraph current collector axis, spherical pore is symmetrical
Center line is overlapped with pantagraph current collector axis, and spherical bore dia SR is less than or equal to 15mm, and spherical bore dia SR is less than D2, spherical hole depth
Spend H1=0.25-0.35SR fills the conducting sphere that a diameter is SR, one piece of conductive pressure of the other end of conducting sphere in spherical pore
Block compress, conductive briquetting by pressure conducting sphere one end open a diameter be SR spherical pore, the size of conductive briquetting spherical pore and by
Stream device small end spherical shape pore size is the same, and conducting sphere is pressed in conductive briquetting spherical pore and pantagraph current collector small end spherical pore, conductive briquetting
It is mounted on afflux seat, pantagraph current collector electric current is flowed into current collection base, forms conducting channel.
6. such as a kind of method and apparatus that the speed regulation of electric train collector system pantagraph current collector reduces abrasion claimed in claims 1-2,
It is characterized by: pantagraph current collector is driven by variable speed driver, motor governing system is according to train running speed measuring system or reads system
System obtains train speed in real time to adjust motor rotary speed, control and adjustment pantagraph current collector and contact net lines or conductor rail contact site it
Between absolute velocity (relative to stationary reference frame), make absolute velocity etc. between pantagraph current collector and contact net lines or conductor rail contact site
In zero or control in a certain range, the absolute value of speed (absolute value including speed is zero), train operation between 0-10m/s
Velocity measuring system data noise requires within 2m/s, and control system regulation pantagraph current collector connects with contact net lines or conductor rail
Contact portion position is with respect to the speed of train reference system, and velocity error requirement is within 2m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710738268.9A CN109421544A (en) | 2017-08-25 | 2017-08-25 | A kind of method and apparatus that the speed regulation of electric train collector system pantagraph current collector reduces abrasion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710738268.9A CN109421544A (en) | 2017-08-25 | 2017-08-25 | A kind of method and apparatus that the speed regulation of electric train collector system pantagraph current collector reduces abrasion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109421544A true CN109421544A (en) | 2019-03-05 |
Family
ID=65500690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710738268.9A Pending CN109421544A (en) | 2017-08-25 | 2017-08-25 | A kind of method and apparatus that the speed regulation of electric train collector system pantagraph current collector reduces abrasion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109421544A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201272254Y (en) * | 2008-07-24 | 2009-07-15 | 义马煤业(集团)有限责任公司 | Overhead line electric locomotive pantograph |
| CN201494586U (en) * | 2009-08-26 | 2010-06-02 | 魏衍昌 | Intelligent clutch for motorcycle |
| CN102555813A (en) * | 2010-12-09 | 2012-07-11 | 李昌福 | Automatic synchronous electric locomotive pantograph current collection device |
| KR20140047445A (en) * | 2012-10-12 | 2014-04-22 | 한국철도기술연구원 | Wheel-on-rail system equipped with a rotary and linear motor propulsion |
| CN104228590A (en) * | 2014-10-12 | 2014-12-24 | 邱世军 | Driving rotating wheel type pantograph head |
| CN204623173U (en) * | 2015-05-20 | 2015-09-09 | 山东华联矿业股份有限公司 | Electric locomotive roller collector bow |
-
2017
- 2017-08-25 CN CN201710738268.9A patent/CN109421544A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201272254Y (en) * | 2008-07-24 | 2009-07-15 | 义马煤业(集团)有限责任公司 | Overhead line electric locomotive pantograph |
| CN201494586U (en) * | 2009-08-26 | 2010-06-02 | 魏衍昌 | Intelligent clutch for motorcycle |
| CN102555813A (en) * | 2010-12-09 | 2012-07-11 | 李昌福 | Automatic synchronous electric locomotive pantograph current collection device |
| KR20140047445A (en) * | 2012-10-12 | 2014-04-22 | 한국철도기술연구원 | Wheel-on-rail system equipped with a rotary and linear motor propulsion |
| CN104228590A (en) * | 2014-10-12 | 2014-12-24 | 邱世军 | Driving rotating wheel type pantograph head |
| CN204623173U (en) * | 2015-05-20 | 2015-09-09 | 山东华联矿业股份有限公司 | Electric locomotive roller collector bow |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109421544A (en) | A kind of method and apparatus that the speed regulation of electric train collector system pantagraph current collector reduces abrasion | |
| CN108454414A (en) | A kind of three rail pantagraph current collector of Novel rolling-type | |
| CN101513844A (en) | High-speed railway and wheel-rail train | |
| CN202236190U (en) | Self-adaptable flexible massage apparatus | |
| CN103235209B (en) | Experimental high speed railway bow net electromagnetic noise generating device | |
| CN207147911U (en) | A kind of three rails of annular spread/collector shoe is by stream and abrasion test platform | |
| CN209111942U (en) | A kind of circular ring shape is by flowing plate pantograph | |
| KR101026716B1 (en) | Pantograph of electrical railway | |
| CN106627160A (en) | Railway car track power obtaining method | |
| CN104028757A (en) | Device and method for manufacturing three-dimensional object | |
| CN207798004U (en) | It is a kind of to roll the device for adjusting pantograph contact surface | |
| CN109459330A (en) | The equipment of slider wear between a kind of simulation bow net | |
| CN115420185A (en) | Vehicle brake shoe residual thickness detection system | |
| CN209114257U (en) | A kind of railroad track connection structure | |
| CN207636320U (en) | A kind of rotary-type third rail/collector shoe in chassis is by stream and abrasion test platform | |
| DE102005011618A1 (en) | Current collector for e.g. tram vehicle, has conductor connected to current supply, where heat treatment arises in contact area and movement of contact point is provided along conductor/ contact area for distribution of heat in vehicle | |
| DE3434803C2 (en) | Collector for 3rd rail | |
| CN109774483A (en) | Pantograph synchronous rolling contact device | |
| CN107579401A (en) | A kind of continous way trolley, current-collector and sliding contact line system | |
| CN2746549Y (en) | Nickel net coating spreading machine | |
| CN203892373U (en) | Slantwise suspended dovetail groove guide rail | |
| DE102018208359B4 (en) | Method for changing a position of at least one contact strip of a current collector in relation to at least one contact wire of an overhead line | |
| CN202519543U (en) | Rail shunting device | |
| CN203557963U (en) | Special powered device for air rail | |
| CN207028866U (en) | Three rails are by stream boots carbon sliding block |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190305 |