CN113232555A - Empty rail traction net - Google Patents
Empty rail traction net Download PDFInfo
- Publication number
- CN113232555A CN113232555A CN202110576384.1A CN202110576384A CN113232555A CN 113232555 A CN113232555 A CN 113232555A CN 202110576384 A CN202110576384 A CN 202110576384A CN 113232555 A CN113232555 A CN 113232555A
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- CN
- China
- Prior art keywords
- rail
- connecting plate
- copper
- contact wire
- air
- 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
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 238000003825 pressing Methods 0.000 claims abstract description 11
- 239000010935 stainless steel Substances 0.000 claims description 22
- 229910001220 stainless steel Inorganic materials 0.000 claims description 22
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 16
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 abstract description 15
- 239000002131 composite material Substances 0.000 abstract description 15
- 238000009434 installation Methods 0.000 abstract description 13
- 239000004020 conductor Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000000712 assembly Effects 0.000 abstract description 2
- 238000000429 assembly Methods 0.000 abstract description 2
- 210000001503 joint Anatomy 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
- B60M1/13—Trolley wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
- B60M1/16—Suspension insulators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
- B60M1/20—Arrangements for supporting or suspending trolley wires, e.g. from buildings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The invention provides an air rail traction net which comprises a copper-clad steel contact wire, bus bars, a pressing plate, insulating supporting pieces and a connecting plate, wherein the copper-clad steel contact wire is fixed at the front ends of the bus bars, the rear parts of the bus bars are connected with the adjustable insulating supporting pieces through the pressing plate, the adjacent bus bars are fixed through the connecting plate, the bus bars and the connecting plate are connected through countersunk head bolt assemblies, counter bores are formed in the bus bars, and through holes are formed in the connecting plate. The continuous copper-clad steel contact wire is adopted as a contact surface to rub with a train current collector and transmit electric energy to the train, joint gaps generated by a rigid-aluminum composite contact rail technology can be effectively reduced, collision noise generated when the current collector passes through a rigid-aluminum composite contact rail joint is effectively reduced, the installation and adjustment of a contact net are facilitated, the current-carrying section requirement of a conductor is saved, the engineering investment is saved, and the pantograph-catenary relationship is improved.
Description
Technical Field
The invention belongs to the field of rail transit, and particularly relates to an air rail traction net.
Background
In recent years, various low-traffic rail transit standards are vigorously developed in China. The first air rail (air rail) test line in China, which was jointly created by China Tang air rail and southwest business in 2016, was built into a communication vehicle, and then air rail test lines were successively built by Qingdao four sides, middle iron workers and the like. Compared with the common urban traffic system, the track of the empty rail passes through; the pier stud is erected in the air, and area is few, generally occupy the city median can, reduce the removal volume as far as possible, can not occupy the original traffic space in city, especially under the prerequisite of current urban traffic overall arrangement, through ground and underground traffic facilities such as light rail, subway, tram, can't further improve the freight capacity, even under the unable further condition of building, through making three-dimensional air transportation network, supply urban rail transit freight capacity. Meanwhile, the novel air-borne entertainment system has a unique shape and a future air-borne operation mode, and is also suitable for projects such as scenic spots, large-scale amusement places and the like.
The transportation capacity of air rail traffic is generally slightly larger than that of a tramcar, or the transportation capacity and the transportation capacity are equivalent, and the energy consumption requirement is very large. A traditional urban rail transit traction power supply system is adopted to provide electric energy for a train, a 10kV power supply is required to be introduced into an urban power grid to a traction substation of a project, the power supply is changed into a DC750V or DC1500V power supply through voltage reduction and rectification, and the train obtains the electric energy through a traction network system. The power supply mode is safe and reliable, flexible in operation, relatively low in maintenance cost, strong in engineering adaptability, free from the influence of line length, driving density, energy consumption requirements and the like, and widely applied to urban rail transit engineering at home and abroad.
At present, the air rail traction net mainly adopts a conductor rail current-donating technology, namely a steel-aluminum composite rail. The main scheme comprises a C-shaped rail and an I-shaped rail, and the structures of the C-shaped rail and the I-shaped rail are shown in figures 1-2. In the track roof beam of air rail, installation contact rail (steel-aluminum composite rail) for the train power supply, anodal and negative pole contact rail both can install in the homonymy, also can install in the offside. The length of a single contact rail is about 12 meters generally, when the contact rail is installed along the line direction, 4-6 contact rails are connected into a long rail or 1 anchor section by connecting plates (middle joints), the long rails are connected by expansion joints, and the contact surface of the anchor section and a current collector is shown in figure 3. The joints of the busbar are formed after the expansion joints and the intermediate joints are connected.
The existing air rail traction net has the following problems:
1. joint gap: the steel-aluminum composite rail provides electric energy to the train through the contact of the stainless steel belt on the surface of the steel-aluminum composite rail and the train current collector, and the surface of the stainless steel belt is required to be smooth as much as possible. No matter the connection position of C shape contact rail or I shape contact rail all has the joint gap, no matter its shape or mounted position, when 2 steel aluminium composite rails butt joint cuts, butt joint installation, the condition that the joint department always has unevenness, not hugging closely for the current collector is unstable when passing through these gaps, has the possibility of scraping the current collector under the train speed.
2. Noise problem: when the current collector passes through the joints, the collision sound of 'bang when bang when' is generated, and finally the regular collision sound similar to that of the old-fashioned train wheel passing through the rail joints is formed. The collision sound is not obvious in steel wheel rail systems such as urban rail transit, the sound of wheel rails is large, and in a rubber wheel rail transit system of an air rail, the noise problem of other systems can be highlighted due to the fact that the noise of the wheel rail system is small, and the sound in the beam can be dispersed and amplified towards the ground direction due to the opening below the rail beam.
3. The installation is difficult: the rigidity of the steel-aluminum composite contact rail is very high, and the installation and the adjustment are very difficult when the steel-aluminum composite contact rail is used under a small curve radius. In the urban rail transit line, the contact rails are all installed on the ground, can be adjusted by a large amount of manpower or by using machinery and the like, and are laid along the line direction smoothly, and the minimum curve radius of the line of the common urban rail transit is 150 m; and the minimum curve radius of the air rail system is 30m, the clear height in the rail beam is less than 1.2m and the air rail system is suspended in the air, and workers are very difficult to bend the contact rail in the rail beam.
Disclosure of Invention
The invention provides an air rail traction net aiming at the technical problems in the prior art, wherein a copper-clad steel contact wire is used for contacting a vehicle current collector and transmitting electric energy, the contact wire is embedded in an aluminum alloy busbar, the busbar is a main current-carrying part and is fixed on an insulating support, and a base of the insulating support is fixed on the side wall of a track beam.
The technical scheme adopted by the invention is as follows: the utility model provides an air rail pulls net, includes copper clad steel contact wire, busbar, clamp plate, insulating support piece and connecting plate, the busbar front end is fixed with copper clad steel contact wire, the busbar rear portion is connected with adjustable insulating support piece through the clamp plate, adjacent pass through the connecting plate between the busbar is fixed, connect through countersunk head bolt subassembly between busbar and the connecting plate, be provided with the counter bore on the busbar, be provided with the through-hole on the connecting plate.
Furthermore, one copper-clad steel contact wire is fixed on a plurality of bus bars.
Further, the copper-clad steel contact wire comprises a copper alloy contact wire and a stainless steel strip, and the stainless steel strip is embedded in a groove at the front end of the copper alloy contact wire. Grooves used for being connected with the bus bar are formed in two sides of the rear portion of the copper alloy contact line.
Furthermore, the front end of the stainless steel band and the front end of the copper alloy contact line form a smooth surface.
Further, the rear part of the stainless steel band is embedded in the groove, and the front part of the stainless steel band covers the front end of the copper alloy contact wire.
Further, the bus bar is T-shaped or
And the front end of the copper clad steel contact wire is clamped and fixed by a bolt component.
Further, the connecting plate is L-shaped, the front part of the connecting plate is pressed on the front surface of the rear part of the bus bar, the rear part of the connecting plate is pressed on the side surface of the bus bar, and the rear end surface of the connecting plate does not exceed the rear end surface of the bus bar.
Furthermore, the bus bar is made of aluminum alloy.
Furthermore, the arc through groove on the insulating support piece is connected with the pressing plate through a bolt, an arc limiting groove is arranged beside the arc through groove, and a bulge corresponding to the limiting groove is arranged on the pressing plate.
Compared with the prior art, the invention has the beneficial effects that:
1. the copper-clad steel contact wire is adopted, the manufacturing length can reach more than 1000m, no joint gap exists on the contact surface within the range of 200 m in the actual use process, the stainless steel band joints of the steel-aluminum composite rail at the position of about 12 m 1 can be effectively reduced, the stainless steel composite rail is in sliding contact with the current collector safely and stably in the running process of a train, the electric energy is transmitted reliably and stably, and the possibility of scraping and touching the current collector is avoided.
2. When the copper-clad steel contact wire is in sliding contact with the current collector, the generated sound is relatively small, is normal friction sound, is not different from the normal section of the steel-aluminum contact rail, does not generate the sound of 'bang is bang' at the joint of the steel-aluminum composite contact rail with regular stroke, is applied to an air rail traffic system, the sound of the air rail traffic system can be covered by the running sound of a wheel rail, the running sound of a motor and the like, and passengers on the ground or in a vehicle can not feel the sound generated by the sliding of the current collector and the contact wire.
3. The invention adopts the shapes of the bus bar and the contact line, and compared with a rigid-aluminum composite contact rail, the rigidity of the contact rail is reduced to a great extent. When the bus bar and the contact wire need to be installed along the curve of the track beam, the bus bar and the contact wire can be deformed and adjusted to the proper installation position through manpower without the aid of machinery or a great deal of manpower. The installation space of the air rail and the limited track beam box body can be conveniently and laborsaving relatively to install and adjust.
4. The contact surface of the copper-clad steel contact wire and the current collector is a stainless steel strip or a stainless steel strip plus copper alloy, so that the wear resistance of the contact wire can be greatly improved.
5. The connecting plate is connected with the busbar body, the connecting plate is arranged on the front surface of the busbar body and fixed by the countersunk bolts, construction and installation are convenient, the bottom of the busbar body is still flat after installation, the installation space of the original busbar body is not exceeded, the insulation distance is not reduced, and safety is ensured.
6. The bus bar body made of the aluminum alloy material is used for bearing current, has the function of clamping a contact line, and meets the use requirement of an air rail traction net; the connecting plate can provide bigger current-carrying cross section when link up the installation on the busbar body, uses in the district section that needs the heavy current locally, and extension busbar current-carrying capacity avoids all adopting the material waste that large cross section busbar caused again.
7. The adjustable insulating support is adopted, the pulling-out value can be adjusted within the range of +/-50 mm, the adjustable insulating support is uniformly distributed at different positions of the current collector, the uniform abrasion is realized, and the utilization rate of the current collector is improved. The arc-shaped limiting groove is formed in the given mounting hole and edge support piece, so that the mounting and adjusting difficulty is greatly reduced, the stress condition of the bolt is improved, and the failure rate is reduced.
Drawings
FIG. 1 is a schematic view of a prior art C-shaped contact rail installation;
FIG. 2 is a schematic view of a prior art I-shaped contact rail assembly;
FIG. 3 is a schematic front view of a prior art contact rail;
FIG. 4 is a schematic structural diagram of an embodiment of the present invention;
FIG. 5 is a schematic sectional view taken along line A-A of FIG. 4;
FIG. 6 is a schematic sectional view taken along line B-B of FIG. 4;
FIG. 7 is a schematic top view of an insulating support according to an embodiment of the invention;
fig. 8 is a schematic structural diagram of another embodiment of the copper-clad steel contact wire of the present invention.
In the figure, 1-copper alloy contact wire, 2-stainless steel band, 3-busbar, 4-connecting plate, 5-countersunk head bolt component, 6-pressing plate, 7-insulating support, 8-arc through groove, 9-limiting groove and 10-contact rail.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
An embodiment of the present invention provides an air rail hauling net, as shown in fig. 4-7, which includes a copper clad steel contact wire, a busbar 3, a pressure plate 6, an insulating support 7 and a connecting plate 4. One copper-clad steel contact wire is fixed on a plurality of bus bars 3 (only two bus bars 3 are shown in the figure). The bus bar 3 made of aluminum alloy is
And the front end of the mould clamps the copper-clad steel contact wire and is fixed by a bolt component. The rear portion of the busbar 3 is connected with an adjustable insulating support member 7 through a pressing plate 6, an arc-shaped through groove 8 in the insulating support member 7 is connected with the pressing plate 6 through a bolt, arc-shaped limiting grooves 9 are formed in two sides of the arc-shaped through groove 8, and protrusions corresponding to the limiting grooves 9 are arranged on the pressing plate 6.
Adjacent it is fixed through connecting plate 4 between busbar 3, connect through countersunk head bolt subassembly 5 between busbar 3 and connecting plate 4, be provided with the counter bore on the busbar 3, be provided with the through-hole on the connecting plate 4. The countersunk head bolt assembly 5 comprises a countersunk head bolt, a nut and a gasket. The connecting plate 4 is L-shaped, the front part of the connecting plate is pressed on the front surface of the rear part of the bus bar 3, the through hole is positioned at the front part of the connecting plate 4, the rear part of the connecting plate 4 is pressed on the side surface of the bus bar 3, and the rear end surface of the connecting plate 4 does not exceed the rear end surface of the bus bar 3. The countersunk bolt assemblies 5 and the connecting plate 4 are configured such that the bottom of the busbar 3 remains flat when it is installed with the busbar 3.
The copper-clad steel contact wire comprises a copper alloy contact wire 1 and a stainless steel strip 2, wherein grooves used for being connected with a bus bar 3 are formed in two sides of the rear portion of the copper alloy contact wire 1. The stainless steel band 2 is embedded in a groove at the front end of the copper alloy contact wire 1. The front end of the stainless steel strip 2 and the front end of the copper alloy contact wire 1 form a smooth surface, namely the contact surface of the copper-clad steel contact wire and the current collector is a smooth surface, so that the copper-clad steel contact wire and the current collector can slide conveniently. The structure of the copper-clad steel contact wire can also be that the rear part of the stainless steel strip 2 is embedded in the groove, and the front part of the stainless steel strip 2 covers the front end of the copper alloy contact wire 1, as shown in fig. 8.
In the embodiment, the continuous copper-clad steel contact wire is used as a contact surface to rub with a train current collector and transmit electric energy to the train, so that joint gaps generated by the rigid-aluminum composite contact rail 10 technology can be effectively reduced, collision noise generated when the current collector passes through the rigid-aluminum composite contact rail 10 joint is effectively reduced, the installation and adjustment of a contact net are facilitated, the current-carrying section requirement of a conductor is saved, the engineering investment is saved, and the pantograph-catenary relationship is improved. The embodiment is applied to air rail traffic, can effectively reduce noise pollution, and can assist the technical progress and engineering application popularization of air rail traffic systems.
The present invention has been described in detail with reference to the embodiments, but the description is only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The scope of the invention is defined by the claims. The technical solutions of the present invention or those skilled in the art, based on the teaching of the technical solutions of the present invention, should be considered to be within the scope of the present invention, and all equivalent changes and modifications made within the scope of the present invention or equivalent technical solutions designed to achieve the above technical effects are also within the scope of the present invention.
Claims (9)
1. An empty rail traction net is characterized in that: the copper-clad steel contact wire is fixed at the front end of the busbar, the rear part of the busbar is connected with the adjustable insulating support through the pressing plate, the adjacent busbars are fixed through the connecting plate, the busbars and the connecting plate are connected through the countersunk head bolt assembly, counter bores are formed in the busbars, and through holes are formed in the connecting plate.
2. An air-rail trailed net according to claim 1, characterized in that: one copper-clad steel contact wire is fixed on a plurality of bus bars.
3. An air-rail trailed net according to claim 1, characterized in that: the copper-clad steel contact wire comprises a copper alloy contact wire and a stainless steel strip, wherein the stainless steel strip is embedded in a groove at the front end of the copper alloy contact wire.
4. An air-rail trailed net according to claim 3, wherein: and the front end of the stainless steel band and the front end of the copper alloy contact line form a smooth surface.
5. An air-rail trailed net according to claim 3, wherein: the rear part of the stainless steel band is embedded in the groove, and the front part of the stainless steel band covers the front end of the copper alloy contact line.
6. An air-rail trailed net according to claim 1, characterized in that: the bus bar is T-shaped or
And the front end of the copper clad steel contact wire is clamped and fixed by a bolt component.
7. An air-rail trailed net according to claim 6, wherein: the connecting plate is L-shaped, the front part of the connecting plate is pressed on the front surface of the rear part of the bus bar, the rear part of the connecting plate is pressed on the side surface of the bus bar, and the rear end surface of the connecting plate does not exceed the rear end surface of the bus bar.
8. An air-rail trailed net according to claim 1, characterized in that: the bus bar is made of aluminum alloy.
9. An air-rail trailed net according to claim 1, characterized in that: the arc-shaped through groove on the insulating support piece is connected with the pressing plate through a bolt, an arc-shaped limiting groove is arranged beside the arc-shaped through groove, and a bulge corresponding to the limiting groove is arranged on the pressing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110576384.1A CN113232555A (en) | 2021-05-26 | 2021-05-26 | Empty rail traction net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110576384.1A CN113232555A (en) | 2021-05-26 | 2021-05-26 | Empty rail traction net |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113232555A true CN113232555A (en) | 2021-08-10 |
Family
ID=77138867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110576384.1A Pending CN113232555A (en) | 2021-05-26 | 2021-05-26 | Empty rail traction net |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113232555A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR840002080U (en) * | 1982-10-13 | 1984-05-28 | 안영천 | Rail joint reinforcement device |
| JPH10250419A (en) * | 1997-03-17 | 1998-09-22 | Toshiba Corp | Vibration isolating trolley wire |
| CN203681309U (en) * | 2014-01-14 | 2014-07-02 | 宝鸡市博通机电设备有限公司 | Ferrule type intermediate connector |
| CN203727198U (en) * | 2014-03-17 | 2014-07-23 | 李雷 | Rigid double-wire contact net |
| CN104986056A (en) * | 2015-07-23 | 2015-10-21 | 淄博道麦逊绝缘子有限公司 | Busbar support insulator |
| CN206544479U (en) * | 2017-03-06 | 2017-10-10 | 南京金城轨道交通设备有限公司 | A kind of Straddle type monorail traction power supply bus-bar |
| CN109606206A (en) * | 2019-01-02 | 2019-04-12 | 中铁高铁电气装备股份有限公司 | A kind of low headroom tunnel overheat rigid contact network cantilevered supporting arrangement |
| CN110660499A (en) * | 2019-10-09 | 2020-01-07 | 中铁建电气化局集团康远新材料有限公司 | Large-length melting and penetrating type copper-steel composite wire and voltage symmetrical wiring method thereof |
| CN110667390A (en) * | 2019-11-12 | 2020-01-10 | 西南交通大学 | Current collecting-grounding device based on rail transit rigid contact net |
| CN111591172A (en) * | 2020-06-02 | 2020-08-28 | 中铁建电气化局集团轨道交通器材有限公司 | Bus bar bracket |
-
2021
- 2021-05-26 CN CN202110576384.1A patent/CN113232555A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR840002080U (en) * | 1982-10-13 | 1984-05-28 | 안영천 | Rail joint reinforcement device |
| JPH10250419A (en) * | 1997-03-17 | 1998-09-22 | Toshiba Corp | Vibration isolating trolley wire |
| CN203681309U (en) * | 2014-01-14 | 2014-07-02 | 宝鸡市博通机电设备有限公司 | Ferrule type intermediate connector |
| CN203727198U (en) * | 2014-03-17 | 2014-07-23 | 李雷 | Rigid double-wire contact net |
| CN104986056A (en) * | 2015-07-23 | 2015-10-21 | 淄博道麦逊绝缘子有限公司 | Busbar support insulator |
| CN206544479U (en) * | 2017-03-06 | 2017-10-10 | 南京金城轨道交通设备有限公司 | A kind of Straddle type monorail traction power supply bus-bar |
| CN109606206A (en) * | 2019-01-02 | 2019-04-12 | 中铁高铁电气装备股份有限公司 | A kind of low headroom tunnel overheat rigid contact network cantilevered supporting arrangement |
| CN110660499A (en) * | 2019-10-09 | 2020-01-07 | 中铁建电气化局集团康远新材料有限公司 | Large-length melting and penetrating type copper-steel composite wire and voltage symmetrical wiring method thereof |
| CN110667390A (en) * | 2019-11-12 | 2020-01-10 | 西南交通大学 | Current collecting-grounding device based on rail transit rigid contact net |
| CN111591172A (en) * | 2020-06-02 | 2020-08-28 | 中铁建电气化局集团轨道交通器材有限公司 | Bus bar bracket |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210810 |
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