CN101985285A - Direct-current (DC) 1500V four-rail mounting structure applied to urban rail transit - Google Patents
Direct-current (DC) 1500V four-rail mounting structure applied to urban rail transit Download PDFInfo
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- CN101985285A CN101985285A CN 201010515898 CN201010515898A CN101985285A CN 101985285 A CN101985285 A CN 101985285A CN 201010515898 CN201010515898 CN 201010515898 CN 201010515898 A CN201010515898 A CN 201010515898A CN 101985285 A CN101985285 A CN 101985285A
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Abstract
The invention discloses a direct-current (DC) 1500V four-rail mounting structure applied to urban rail transit. The structure comprises a traction rail, a return-current rail and two rows of running rails, wherein an insulation bracket is arranged on one side of the running rails; and the traction rail and the return-current rail are clamped in insulation blocks of the insulation bracket. In a DC traction four-rail power supply system for the urban rail transit of the invention, the four rails (the return-current rail) are insulated from other facilities such as a track bed and the like completely without stray current, so stray-current resistant measures and facilities are no longer taken into consideration. The DC1500V four-rail mounting structure applied to the urban rail transit has the greatest advantages of protecting structural reinforcing steel and metal pipelines in stations, tunnels and the like from being corroded by the stray current, prolonging the service life of each of tunnels, bridges, pipelines and the like in rail transit and guaranteeing the safety of an urban rail transit system.
Description
Technical field
The present invention relates to provide for electric locomotive in the urban track traffic electric power system of traction power, particularly a kind of DC1500V four rails (backflow rail) mounting structure that is applied to urban track traffic.
Background technology
Power supply of urban orbit traffic system traction net is the electric power system that traction power is provided for electric locomotive, and it is made up of the contact system and the net that refluxes, and contact system is anodal, and the backflow net is a negative pole, is connected with traction substation respectively.Contact system is by the different contact rail and the overhead contact lines of being divided into of installation site and contact wire.The backflow net major part of city rail traffic route all utilizes rail as the backflow rail in the world at present.No matter present stage urban rail transit in China employing DC1500V or DC750V voltage form are all powered to vehicle by overhead contact line or contact rail (also claiming " three rails "), and flowed back to traction substation by rail, form current supply circuit.
Under this power supply system, though require rail as backflow rail and railway roadbed insulating mounting, because engineering construction and operation condition, rail can not electrically isolate from railway roadbed fully, causes traction current to pass through the rail leakage impedance and flows out rail, leaks and forms stray current.Stray current all will produce corrosion to rail, solid bed structure reinforcing bars, tunnel structure reinforcing bar and urban track traffic hardware along the line, influence the service life of urban track traffic rail, tunnel structure reinforcing bar and hardware, be related to the comprehensive service life in tunnel, consequence is very serious.Though consider that in power supply of urban orbit traffic standard in the past the stray current collecting net is set reduces the corrosion of stray current to metal construction in solid bed, but the stray safeguard procedures can only reduce stray current to the metal corrosion degree, can not solve the infection of stray current fully, along with the increase in operation age, the stray current spillage will progressively increase.On rail, produce difference of potential when traction current is by rail simultaneously, be transmitted in the compartment by wheel, personal safety to the passenger produces threat, on needing AT STATION the rail potential restraint device is set, though this scheme can solve the influence of rail potential to the passenger, frequent action may have influence on the electric power system reliability of operation again.
The DC traction net voltage class of urban track traffic is various in the world at present, it is several to mainly contain DC600V, DC750V, DC825V, DC1200V, DC1500V etc., the circuit that its middle and later periods builds up adopts DC750V and DC1500V voltage form more, also is the voltage class that employing is recommended by International Electrotechnical Commission (IEC).The DC1500V voltage form has that power supply distance is long, the loss of voltage is little, can bear advantages such as passenger flow volume is big, the stray current influence is little, and the traction power supply voltage form of DC1500V is adopted in the urban track traffic that China builds at present more.In addition, contact rail has does not influence advantages such as urban look, long service life, maintenance be little.Also adopted the traction net system of contact rail in a plurality of urban track traffics of China.
Summary of the invention
Based on above-mentioned situation, the present invention proposes a kind of DC1500V four rail mounting structures that are applied to urban track traffic, realization combines the preceence of four rails backflow and the preceence of DC1500V power supply system effectively, in order to eliminate the stray current in the urban track traffic.
The technical solution adopted in the present invention: a kind of DC1500V four rail mounting structures that are applied to urban track traffic, comprise traction rail, backflow rail and two row rails, one side of described rail is equipped with insulating support, and described traction rail and backflow rail are clamped in the collets of insulating support.
The track contact surface of above-mentioned traction rail and backflow rail is for upwards being provided with, with collector shoe on the locomotive by contacted by stream mode with upper lateral part, form current supply circuit.
The track contact surface of above-mentioned traction rail and backflow rail is to be provided with downwards, with collector shoe on the locomotive by contacted by stream mode with side lower part, form current supply circuit.
The track contact surface of above-mentioned traction rail and backflow rail is towards a side setting of rail, contacted by stream mode with collector shoe on the locomotive by the homonymy side, forms current supply circuit.
The top of above-mentioned traction rail is provided with protective cover.
Above-mentioned traction rail and backflow rail be the platform place AT STATION, is arranged in the offside of platform.When described traction rail and backflow rail are provided with evacuation platform in the interval, be arranged on the offside of evacuation platform.
Urban track traffic DC traction four rail electric power systems of the present invention and since four rails (backflow rail) thoroughly with other facilities insulation such as railway roadbed, do not have stray current, also just no longer consider to prevent the measure and the facility of stray current.Its biggest advantage is to have protected structure reinforcing bars such as station, tunnel and metal pipe line not by stray, has improved the service life of tunnel, bridge, pipeline etc. in the track traffic, has guaranteed the safety of City Rail Transit System.
Description of drawings
The current potential scheme drawing of Fig. 1 rail when to be train move between two traction institutes;
Fig. 2 is subjected to the mounting structure scheme drawing of stream mode with upper lateral part for traction rail of the present invention and backflow rail;
Fig. 3 is subjected to the mounting structure scheme drawing of stream mode with side lower part for traction rail of the present invention and backflow rail;
Fig. 4 is subjected to the mounting structure scheme drawing of stream mode for traction rail of the present invention and backflow rail homonymy side;
Fig. 5 is the contact rail of the present invention mounting structure scheme drawing at platform place AT STATION.
Among the figure: 1-protective cover, 2-traction rail, 3-backflow rail, 4-protective cover, 5-rail, 6-insulating support, 10-contact rail.
The specific embodiment
Be further described of the present invention below in conjunction with accompanying drawing.
One, the generation of stray current and traditional means of defence in the urban track traffic:
1. the generation of stray current
The tractive power supply system of existing urban track traffic is to be the DC traction power-supply system of current return circuit with overhead contact line or contact rail (three rails) power supply, rail substantially.Because the restriction of operating environment, economy and other aspect factor, rail can not electrically isolate from ballast bed structure fully, so rail is inevitably to railway roadbed and station, tunnel structure leakage current, i.e. stray current.
Rail has adopted the insulation method to install in actual engineering, has increased insulating mat and insulating tube at each rail attachment point, and the rail return current system is a suspension system.Rail is actually uninsulated over the ground after adopting this method installation, and there is bleeder resistance in rail (solid bed) over the ground, different countries to the rail bleeder resistance require different, generally in 5～100 Ω km scopes.City rail traffic route rail that regulation is newly built up in China's " urban track traffic stray guard technology rules " and the transition resistance value between the tunnel agent structure (or greatly) should be less than 15 Ω km, should be less than 3 Ω km for circulation line.
When train moves between two traction institutes, the current potential of rail as shown in Figure 1, the train position place is the positive column, rail potential is for just; Near the traction institute is cathode region, and rail potential is for negative.Urban track traffic solid bed or tunnel structure are zero level.So the rail current of high potential forms stray current by the structure reinforcing bars that the bleeder resistance between rail and railway roadbed or the tunnel flows in railway roadbed or the tunnel.The size of stray current is exactly the integration that the shade section leaks to underground current density among Fig. 1 from rail.
2. stray current is to the corrosion and the protection principle of reinforcing bar
Stray current is an electrochemical corrosion to the corrosion of structure reinforcing bars, when stray current enters structure reinforcing bars, structure reinforcing bars is not produced corrosion; And when stray current flows out structure reinforcing bars, reinforcing bar is produced corrosion.The principle of its corrosion is reinforcing bar and cement silicate generation electrochemical reaction all around, and reinforcing bar discharges ferric ion and generates other cmpd with electrolyte reaction on every side.
If density of current is less than 0.6mA/dm
2, can form the bigger cmpd of a layer resistivity at rebar surface after then electrochemical reaction takes place.Along with the continuity of time when this compound thickness acquires a certain degree, will become one deck external insulation layer of parcel reinforcing bar, thereby stop reinforcing bar to contact with the electrolytical continuation of outside cement silicate, stoped the continuation corrosion of stray current to reinforcing bar, this state is called the corrosion and passivation state.When current potential continued to raise, passive state was destroyed, thereby the reinforcing bar positive ion continues to dissociate reinforcing bar to reinforcing bar generation corrosion.
Stray current has four aspects to the corrosion of metal construction: rail, ballast bed structure reinforcing bar, tunnel structure reinforcing bar, earth mat, outside other common facilities of urban track traffic.
When stray current flows out from rail, produce corrosion to rail.When stray current leaks to when underground, according to the urban track traffic structure, at first leak to the railway roadbed reinforcing bar, the railway roadbed reinforcing bar is if vertically form then first electric clear path for running in the downward leakage process of stray current of electric path, and flow to traction institute direction along this path, traction flow out reinforcing bar after to rail.Can not collect all stray currents at positive column railway roadbed reinforcing bar, total also have part to continue to leak to tunnel structure, it is same if the tunnel reinforcing bar vertically forms electric path and then becomes second electric clear path that stray current runs into, and along this path to drawing direction, flow back into the railway roadbed reinforcing bar in traction institute zone (cathode region), and flow back into rail.Also have in the positive column part stray current that leaks into the earth from the tunnel traction of living in through the tunnel or earth mat return rail.
When stray current flows back to traction substation in the tunnel structure reinforcing bar, also have the part stray current to flow out structure reinforcing bars other common facilitiess outside station grounding lattice or the tunnel.This part stray current also will be got back to traction substation at last, when flowing out grounding lattice or other common facilitiess grounding lattice or common facilities is produced corrosion.
3. safeguard procedures
On the one hand, the minimizing on the stray current total amount of control all fronts, on the other hand, for City Rail Transit System inner structure reinforcing bar, reducing the density of current that stray current flows out metal construction as far as possible, stop the corrosion of stray current to reinforcing bar, is the essential measure that the stray current protective system adopts.
The safeguard procedures of taking in actual engineering are as follows:
(1) reduce the traction substation spacing: 3 powers of the length between the size that stray current produces and the traction substation are directly proportional, and the stray current of the more little generation of traction substation spacing is just more little.
(2) reduce the rail longitudinal electrical resistance: the longitudinal electrical resistance of rail is more little, and the pressure drop that backflow produces on rail is more little, and the stray current of generation is just more little.
(3) increase the rail bleeder resistance: the insulating power when rail is installed are good more, and the rail bleeder resistance is big more, and the stray current that leaks from rail is just few more.
(4) the current drainage net is set in railway roadbed: according to the corrosion and the protection principle of stray current to reinforcing bar, the reinforcing bar of one uniform section is set in solid bed, electrical communication (being the current drainage net) makes the density of current that flows out from reinforcing bar be controlled at (0.6mA/dm in the passive state scope completely
2), although then there are some stray currents to flow out reinforcing bar the ballast bed structure reinforcing bar is corroded.
(5) set up the current drainage cabinet at traction substation: the current drainage cabinet is set at traction substation, with the negative busbar of a termination substation direct current of current drainage cabinet, another termination solid bed current drainage terminal, tunnel structure current drainage terminal and grounding lattice, make the stray current in solid bed and tunnel structure current drainage net and grounding lattice directly flow back to traction substation, prevented the corrosion of stray current structure reinforcing bars and common facilities.
4. the defective of traditional stray current safeguard procedures
Because traditional DC supply pattern has determined the certainty that stray current produces, though taked various measures, but stray current still can produce corrosion to rail, ballast bed structure reinforcing bar, tunnel structure reinforcing bar and other common facilitiess, increase along with the operation age, the insulating power of various insulating materials descend gradually, the rail bleeder resistance is more and more littler, and stray electrical fails to be convened for lack of a quorum increasing.Find that in the process of real-world operation there are some insurmountable problems in this DC supply pattern.
(1) rail potential height
In the city rail traffic route that has moved at present, the actual potential of all finding rail is than design value height, the phenomenon that causes rail potential restraint device frequent movement, for the safety that guarantees electric power system and passenger's personal safety, can only adopt the long-term measure of closing a floodgate of the high substation's rail potential restraint device of rail potential, form bigger stray current.
(2) the current drainage cabinet has increased the stray current total amount
When adopting the current drainage method, the rail system is referred to as ground system, because when having electric current to flow to negative busbar from reinforcing bar along current drainage cable (through diode), originally the negative potential of negative busbar becomes near zero level, thereby the effect of clamping down on of invar rail longitudinal voliage make two tractions between the highest above earth potential of rail increased by one times, almost all become the positive column between two tractions institute, the stray current total amount has increased nearly four times.Because the total amount of stray current increases too many, a reinforcement corrosion reduces near traction institute, will rise at the etching extent of the rail in interval, interval reinforcing bar might the etching extent rising.
(3) the current drainage net has increased the design difficulty of track and signal
The current drainage net the layout that has changed solid bed inner structure reinforcing bar is set, structure reinforcing bars is too near apart from rail, can not satisfy the structure reinforcing bars that the signal specialty requires and the spacing of rail.Increasing of structure reinforcing bars makes solid bed cast back produce the crack simultaneously, influences the safety of solid bed.
Two, the mounting structure of DC1500V four rail systems
Shown in Fig. 2～4, the contact rail 10 of four rail systems of the present invention mainly is made up of traction rail 2, backflow rail 3, supportive device, protective cover 1, expansion pipe, end bends, mid point anchor and ordinary couplings etc.Wherein, traction rail 2 and backflow rail 3 adopts the compound rail of steel aluminium of same types, and traction rail 2 is responsible for providing electric energy incessantly to locomotive, and backflow rail 3 links to each other with substation negative pole cabinet, forms a complete loop to locomotive power supply.
Four rail systems adopt the side to be subjected to stream mode usually, and it is subjected to the difference of stream mode according to the installation site, can be divided into the homonymy dual mode that both sides, traction rail and backflow rail that traction rail and backflow rail be installed in circuit respectively are installed in circuit respectively.Consider that from economy and engineering practicability traction rail and backflow rail are installed in the hang of circuit both sides and inadvisable respectively, the present invention adopts the mode of traction rail and the installation of backflow rail homonymy.
In addition, according to the difference of sus-pension, when traction rail and backflow rail homonymy are installed, can be divided into again that top is subjected to stream, the bottom is flowed and three kinds of modes are flowed in the side.Three kinds of scheme of installation such as Fig. 2, Fig. 3, shown in Figure 4 that are subjected to stream mode.
As shown in Figure 2, the traction rail 2 and the backflow rail 3 that installed by stream mode with upper lateral part all are clamped in the collets at insulating support 6 tops, can guarantee that traction rail 2 and backflow rail 3 are all along with temperature traverse is freely stretched.Protective cover 1 connection covers on the traction rail, makes traction rail and backflow rail all be protected more than the tread face.Wherein, traction rail 2 contacts and is flowed with traction rail, backflow rail from top by collector shoe with backflow rail 3 relative the same sides that are installed on rail 5 (rail), train.
The advantage of this scheme is easy for installation, and parts are ripe relatively, is subjected on original top to revise a little on the basis of stream mode three rail parts to satisfy use.But compared by stream mode with the side, collector shoe contacts with the backflow rail with traction rail simultaneously from top, and it is unstable to get stream.
As shown in Figure 3, the traction rail 2 and the backflow rail 3 that installed by stream mode with side lower part all are clamped in the collets at insulating support 6 tops, are in " suspension " state, thereby can guarantee that traction rail 2 and backflow rail 3 are all along with temperature traverse is freely stretched.Protective cover 4 connections cover on the traction rail, make traction rail and backflow rail all be protected more than the tread face.Wherein, traction rail 2 contacts and is flowed with traction rail, backflow rail from following by collector shoe with backflow rail 3 relative the same sides that are installed on rail 5 (rail), train.
The advantage of this scheme is easy for installation, and parts are ripe relatively, is subjected in original bottom to revise a little on the basis of stream mode three rail parts to satisfy use.But compared by stream mode with the side, collector shoe contacts with the backflow rail with traction rail simultaneously from following, and it is unstable to get stream.
As shown in Figure 4, the homonymy side is subjected to make to be subjected to stream interface towards rail 5 in the collets of the traction rail 2 of stream mode installation and the side that backflow rail 3 all is clamped in insulating support 6, and traction rail 2 and backflow rail 3 are all along with temperature traverse can freely be stretched.Protective cover 1 connection covers on the traction rail, makes traction rail and backflow rail all be protected more than the tread face.Wherein, traction rail 2 and backflow rail 3 relative the same sides that are installed on rail 5 (rail), train contacts and is flowed with traction rail, backflow rail from the side by collector shoe.This scheme integral structure is simple, easy for installation, and it is more stable that collector shoe is got stream.
Above-described three kind of four rail system is not only applicable to be applicable to line conditions such as rail on ground, overpass in the subterranean tunnel that the installation of its mounting structure and subterranean tunnel is similar, does not repeat them here yet.Explanation by above-mentioned three kinds of schemes more than is subjected to the stream scheme all can satisfy the requirement of four rails power supply as can be seen.In general, three kinds of technology and economic performances that flowed scheme are suitable substantially.Two kinds of influences that are subjected to the stream scheme to other relevant speciality of following brief analysis.
1) to the influence of gauge specialty
Be subjected to stream and be subjected to stream mode because traction rail and backflow rail homonymy are installed up and down with upper lateral part with side lower part, therefore the insulating support height increases, and the gauge that the contact system specialty needs increases, and compares with the DC1500V third rail system, the vertical direction headroom increases 350mm approximately, and the horizontal direction gauge is constant substantially; The side is subjected to stream mode because traction rail and backflow trackside face are installed, and compares with the DC1500V third rail system, and the vertical direction headroom increases about 200mm, and horizontal direction increases about 50mm.
2) to the influence of vehicle specialty
Compare with traditional power supply mode vehicle, three kinds of modes are great to the influence of vehicle specialty, and the tractive power supply system of vehicle needs thoroughly to change.But for three kinds of modes, be subjected to stream mode and be subjected to stream mode to require the vehicle collector shoe spatially apart from being subjected to stream mode big than homonymy side with side lower part with upper lateral part, many at least rail height are therefore bigger to the influence of vehicle unitary construction.
3) to the influence of other specialty
Need avoid the specialty that heavy current is disturbed for fire pipes and light current etc., should be installed in the offside of contact rail as far as possible, change sides at contact rail and arrange and to raise as far as possible and lay, to guarantee safety distance between the two to avoid the time.To this three all unanimity that influences that is subjected to stream mode.
By above-mentioned comprehensive comparison, can draw main conclusions as shown in the table.
Consider that from economy and engineering practicability it is inadvisable that traction rail and backflow rail are installed in the hang of circuit both sides respectively.And traction rail and backflow rail homonymy mounting means, because power rail (traction rail) and backflow rail exist simultaneously, non-conductive reliability and answer emphasis to consider between two rails to the influence of car construction.If employing is flowed with upper lateral part or is subjected to stream mode with side lower part, between two rails, for satisfying the insulation distance requirement, distance is bigger between two rails, increases the space requirement of four rail systems installation when getting stream owing to collector shoe on the one hand; On the other hand, increase the required distance of positive and negative collector shoe again, thereby have influence on the unitary construction of locomotive at vertical direction.Therefore, DC1500V four rail systems are under traction rail and the simultaneous pattern of backflow rail, and preferred plan can adopt the homonymy side to be subjected to stream mode.
As shown in Figure 5, platform place AT STATION, contact rail 10 is arranged in (comprising traction rail, backflow rail etc.) offside of platform; When the interval is provided with evacuation platform, be arranged on the offside of evacuation platform, so that contact rail is away from the passenger, reduces the passenger and fall the possibility that shock hazard takes place for circuit or operation personnel.
Main purpose of the present invention is the etching problem that solves stray current, and in urban track traffic, the protection that reaches stray current on the overpass in the tunnel is the technology emphasis.Therefore, when considering DC1500V four rail system engineering applicabilities, need the outstanding technical advantage of considering its stray current protection aspect.DC1500V four rail systems compare with the DC1500V third rail system, and for the basically identical that requires of civil engineering, clearance of tunnel requires can be constant, only bigger at four rail installation place installing spaces, and the part location may need other comprehensive pipeline suitably to adjust to dodge.
Urban track traffic DC traction four rail electric power systems since four rails (return current rail) thoroughly with other facilities insulation such as railway roadbed, do not have stray electrical current, also just no longer consider to prevent measure and the facility of stray electrical current. Compare with traditional direct current supply pattern (such as third rail system), have the following advantages:
(1) longitudinal electrical resistance, joint welding, the rail of track are installed no requirement (NR);
(2) to ballast bed structure, tunnel structure and elevated structure no requirement (NR);
(3) cancellation station rail potential restraint device;
(4) cancellation current drainage cabinet;
(5) cancellation scramble current monitoring system;
(6) cancellation rail insulation knot;
(7) the interval stube cable of cancellation shield structure;
(8) cancellation shield door insulating tape;
(9) guarantee that metal construction can not be corroded.
Have city rail traffic route now owing to utilize the rail return current that supports locomotive operation, inevitably can produce stray current and leak, thus the service life of corrosion structure reinforcing bar, reduction tunnel or bridge.And adopt four rail technique of backflow of the present invention, and can avoid the harm of stray fully, improved the service life of tunnel, bridge, pipeline etc., guaranteed the safety of City Rail Transit System.
Claims (7)
1. DC1500V four rail mounting structures that are applied to urban track traffic, it is characterized in that: comprise traction rail (2), backflow rail (3) and two row rails (5), one side of described rail (5) is equipped with insulating support (6), and described traction rail (2) and backflow rail (3) are clamped in the collets of insulating support (6).
2. according to the described DC1500V four rail mounting structures that are applied to urban track traffic of claim 1, it is characterized in that, the track contact surface of described traction rail (2) and backflow rail (3) is for upwards being provided with, with collector shoe on the locomotive by contacted by stream mode with upper lateral part, form current supply circuit.
3. according to the described DC1500V four rail mounting structures that are applied to urban track traffic of claim 1, it is characterized in that, the track contact surface of described traction rail (2) and backflow rail (3) is to be provided with downwards, with collector shoe on the locomotive by contacted by stream mode with side lower part, form current supply circuit.
4. according to the described DC1500V four rail mounting structures that are applied to urban track traffic of claim 1, it is characterized in that, the track contact surface of described traction rail (2) and backflow rail (3) is towards a side setting of rail (5), contacted by stream mode with the collector shoe on the locomotive by the homonymy side, form current supply circuit.
5. according to the described DC1500V four rail mounting structures that are applied to urban track traffic of arbitrary claim in the claim 2 to 4, it is characterized in that the top of described traction rail (2) is provided with protective cover.
6. according to the described DC1500V four rail mounting structures that are applied to urban track traffic of arbitrary claim in the claim 1 to 4, it is characterized in that described traction rail (2) and backflow rail (3) be the platform place AT STATION, be arranged in the offside of platform.
7. according to the described DC1500V four rail mounting structures that are applied to urban track traffic of arbitrary claim in the claim 1 to 4, it is characterized in that described traction rail (2) and backflow rail (3) are arranged on the offside of evacuation platform when in the interval evacuation platform being set.
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| CN103921694A (en) * | 2014-03-26 | 2014-07-16 | 铁道第三勘察设计院集团有限公司 | Integral insulating support of maglev transportation contact rail |
| CN105501080A (en) * | 2015-12-22 | 2016-04-20 | 中铁第四勘察设计院集团有限公司 | Magnetic suspension engineering lateral current-collecting contact rail system |
| CN105835726A (en) * | 2016-04-07 | 2016-08-10 | 西南交通大学 | Pavement power supply construction of bus rapid transit |
| CN106891780A (en) * | 2017-03-24 | 2017-06-27 | 南京铁道职业技术学院 | A kind of track traffic stray electrical current absorption plant |
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| CN103921694A (en) * | 2014-03-26 | 2014-07-16 | 铁道第三勘察设计院集团有限公司 | Integral insulating support of maglev transportation contact rail |
| CN105501080A (en) * | 2015-12-22 | 2016-04-20 | 中铁第四勘察设计院集团有限公司 | Magnetic suspension engineering lateral current-collecting contact rail system |
| CN105501080B (en) * | 2015-12-22 | 2018-03-09 | 中铁第四勘察设计院集团有限公司 | A kind of Maglev Project sidepiece awards stream conductor rail system |
| US11065983B2 (en) | 2016-04-07 | 2021-07-20 | Southwest Jiaotong University | Railway transportation power supply construction |
| CN105835726A (en) * | 2016-04-07 | 2016-08-10 | 西南交通大学 | Pavement power supply construction of bus rapid transit |
| WO2017174001A1 (en) * | 2016-04-07 | 2017-10-12 | 西南交通大学 | Railway transportation power supply construction |
| CN105835726B (en) * | 2016-04-07 | 2018-06-19 | 西南交通大学 | A kind of road surface power-supply construction of rapid transit system |
| CN109415001A (en) * | 2016-04-07 | 2019-03-01 | 西南交通大学 | A kind of rail traffic powered construction |
| CN108454414A (en) * | 2017-02-18 | 2018-08-28 | 天津益昌电气设备股份有限公司 | A kind of three rail pantagraph current collector of Novel rolling-type |
| CN106891780A (en) * | 2017-03-24 | 2017-06-27 | 南京铁道职业技术学院 | A kind of track traffic stray electrical current absorption plant |
| CN109130956A (en) * | 2017-07-06 | 2019-01-04 | 天津中铁电气化设计研究院有限公司 | A kind of positive and negative electrode systems in field section and earthed system that special rail flows back under power supply system |
| CN108297742A (en) * | 2018-03-26 | 2018-07-20 | 中铁电气化局集团宝鸡器材有限公司 | A kind of adjustable insulation support device of four rail of urban transportation |
| CN110554238A (en) * | 2019-07-30 | 2019-12-10 | 中铁上海工程局集团华海工程有限公司 | Stray current prevention testing method for subway integral ballast bed construction |
| CN110554238B (en) * | 2019-07-30 | 2023-11-24 | 中铁上海工程局集团华海工程有限公司 | Stray current prevention test method for whole ballast bed construction of subway |
| CN113451849A (en) * | 2021-07-01 | 2021-09-28 | 李建华 | City subway engineering rail-laying stray current terminal fixed mounting device |
| CN114382024A (en) * | 2022-01-19 | 2022-04-22 | 中铁第四勘察设计院集团有限公司 | Elevated area discontinuous structure based on four-rail backflow urban B-type vehicle clearance design |
| CN114382024B (en) * | 2022-01-19 | 2023-11-28 | 中铁第四勘察设计院集团有限公司 | Overhead section structure based on four-rail backflow city B-type vehicle limit design |
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Application publication date: 20110316 |