CN101746281A - Rigid contact net expansion joint - Google Patents
Rigid contact net expansion joint Download PDFInfo
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- CN101746281A CN101746281A CN201010113485A CN201010113485A CN101746281A CN 101746281 A CN101746281 A CN 101746281A CN 201010113485 A CN201010113485 A CN 201010113485A CN 201010113485 A CN201010113485 A CN 201010113485A CN 101746281 A CN101746281 A CN 101746281A
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Abstract
The invention provides a rigid contact net expansion joint, which belongs to the field of rail transit equipment and solves the problems that the existing expansion joint has low compensation amount to cause high total manufacturing cost and the like. The rigid contact net expansion joint is arranged between two bus bars. The rigid contact net expansion joint is characterized by comprising a fixed joint and a movable joint which can conduct electricity; the fixed joint and the movable joint are used for fixing with the connecting end of one of the bus bars respectively; a guide piece with electric conductivity for connecting the fixed joint and the movable joint is arranged between the fixed joint and the movable joint; the fixed joint is fixed with the guide piece; the movable joint can move along with the guide piece; and a contact line 1 for transmitting current to an electric system of a train is fixedly arranged on the guide piece. The rigid contact net expansion joint is a plug-in expansion joint, and the adjacent two bus bars and the expansion joint are arranged on the same straight line, so the expansion joint is favorable for improving the utilization rate of the bus bars, equivalently improving the length of an anchorage section, and has large compensation amount.
Description
Technical field
The present invention relates to a kind of expansion pipe that is used to connect rigid contact net, belong to the track traffic apparatus field.
Background technology
Electrified railway and urban track traffic generally adopt rigid contact net promptly to realize current-carrying by the bus duct that aluminum alloy materials is made, though the bus duct of this kind material has excellent conducting performance and current-carrying performance, it can produce the phenomenon of expanding with heat and contract with cold with the variation of temperature.
In order to solve rigid contact net owing to stretching that temperature traverse causes, rigid contact net is divided into some certain-lengths and separate segmentation, each segmentation is called " anchor section ", and per two adjacent anchor sections connect by overlap or expansion pipe.Though it is simple that overlap is set, and can produce the serious phenomenon of abrasion of contact wire at the overlap place; Adopt expansion pipe not only can solve rigid contact net owing to stretching that temperature traverse causes, simultaneously two adjacent anchor sections are connected, (pantograph is a kind of hauling engine or power car are obtained electric energy from contact system a electrical equipment for pantograph, be installed on locomotive or the power car roof, mainly be divided into two kinds on single armed bow and both arms bow, adopt the single armed bow in recent years mostly, it mainly contains liter bow and falls two actions of bow, rising bow is exactly pantograph to be risen contact with contact wire, fall bow and be exactly and pantograph is descended and disengage line) smooth transition created condition, and then improved the running velocity of train.
Generally adopt the parallel movable expansion pipe at present, when being installed, this joint need make the adjacent parallel setting of staggering of two bus ducts (anchor section), by this joint a last bus duct and a back bus duct are connected, the two ends of bus duct are all scalable, but the compensation rate of this joint is little, only be 500 millimeters, only be applicable to the flexible compensation of short anchor section rigid contact net.
Just like China Patent No. ZL 02258484.6 a kind of expansion pipe is disclosed still, this joint is by being separately fixed on the neighboring terminal of two trolleys by two control agents of copper braid bonded assembly, the two ends of copper braid are connected with the electric conductor inner core of trolley respectively, the copper braid is used to make electric current continuous, and the stroke of satisfied two trolleys, also two control agents are led by the guide rod that is located between two control agents, but the copper braid is in the state of pressurized or tension for a long time, easily produce endurance failure, cause the inefficacy of copper braid; In addition, the unexposed pantograph of this structure be how from the trolley smooth transition to expansion pipe, by its accompanying drawing as can be known, neither one and trolley have the part of equal height in the expansion pipe, and pantograph is slided at sustained height all the time, can be not fluctuated.
Summary of the invention
The invention provides and a kind ofly can improve the anchor segment length, increase compensation rate, the rigid contact net expansion joint that total cost is low.
Purpose of the present invention can realize by following technical proposal: a kind of rigid contact net expansion joint, be located between two bus ducts, it is characterized in that, described expansion pipe comprise can conduct electricity decide joint and moving joint, describedly decide joint and moving joint and be respectively applied for the coupling end of a bus duct wherein and fix, describedly decide to be provided with the guide that is connected both and has conductive capability between joint and the described moving joint, describedly decide joint and described guide fixes, described moving joint can move along guide, also is installed with on the described guide to be used for the contact wire one of current delivery to the train using electricity system.
This rigid contact net expansion joint is in order to compensate the stroke that bus duct produces with temperature Change, rigid contact net is made up of many bus ducts, leave spacing (this spacing is relevant with the stroke of bus duct) between the bus duct of certain-length, the expansion pipe that connects two bus ducts respectively is housed in this spacing.
When the temperature heating, bus duct extends because of being heated (because the width of bus duct is less, therefore, change width can be ignored), and joint bonded assembly one end of deciding in every bus duct and the expansion pipe is all fixed, thus every bus duct all towards with expansion pipe in moving joint bonded assembly one end elongation, under the directional tagging of guide, joint is steadily moved in the length range of guide, and this is the process of compensation stroke; Compensation process was also like this when temperature turned cold, and only bus duct shortens because of catching a cold.
Simultaneously, from the electric current on the bus duct by deciding joint or moving joint is passed on the guide, make current delivery in the using electricity system of train by the contact wire on the guide one again, generally pantograph all is housed at the top of train, rising by pantograph contacts power taking with contact wire one, decline by pantograph makes it disengage line one, and when pantograph arrived the bus duct place, pantograph contacted with contact wire two on the bus duct; When pantograph arrived expansion pipe place, pantograph contacted with contact wire one in the expansion pipe, makes whole rigid contact net holding current perforation thus.
In above-mentioned rigid contact net expansion joint, described guide comprises that two make that described to decide joint and moving connector clamp located therein and be flat guide rail one, described two guide rails one are parallel to the moving direction of moving joint, describedly decide the end that joint is fixed in two guide rails one, the other end of two guide rails one is located in described moving joint activity, and described contact wire one is individually fixed in the bottom of two guide rails and runs through the two ends of corresponding guide rail.Lead by two flat guide rails one, make moving joint move steadily; When actual installation, should make two contact wires one on the guide rail one overlapping on the sense of motion of pantograph, thereby pantograph is subjected in motion process continuously with the contact wire two on adjacent two bus ducts.
In above-mentioned rigid contact net expansion joint, also be respectively equipped with the roof pressure structure of the contact pressure that can regulate between the two between described moving joint and described two guide rails one.Make between joint and two guide rails one by the roof pressure structure to have suitable contact pressure, reduce the wearing and tearing of moving joint and guide rail one, improve electric conductivity, and make and be electrically connected that current-carrying is steady, current-carrying capacity is big.
In above-mentioned rigid contact net expansion joint, described roof pressure structure comprises a compressing tablet, have the chute that is parallel to moving joint moving direction on the described guide rail one, in the outside of guide rail one, described screw passes chute and moving joint fixes by the screw roof pressure for described compressing tablet.After tightening screw, make the inside roof pressure of compressing tablet on guide rail one, not only can eliminate the gap between moving joint and the guide rail one, can also make and have suitable predetermincd tension between the two, the tightness of screw is determining the size of current-carrying capacity and initial slip load, and compressing tablet can also play further directional tagging to moving joint.
In above-mentioned rigid contact net expansion joint, also be installed with in parallel between described two guide rails one and pass the guide rail two of deciding joint and moving joint respectively.Set up the flatness in the time of to improve moving joint behind the guide rail two and move.
In above-mentioned rigid contact net expansion joint, described guide rail two adopts conductive material to make.Guide rail two is the same with guide rail one, is a kind of carrying object also, helps improving current-carrying capacity.
In above-mentioned rigid contact net expansion joint, described guide rail two is cylindrical, and the two ends of guide rail two and socket thereon decide between joint and the moving joint the annular fingertip that socket respectively has conductive capability.The annular fingertip can strengthen deciding the contact pressure between joint and moving joint and the guide rail two, make that the electrical connection current-carrying is steady, current-carrying capacity is big, the concrete structure of fingertip belongs to prior art, it is made by the high-quality conductive material, be used to strengthen the contact performance of two conductors, different shapes such as annular fingertip, lobe shape fingertip, Z-shaped fingertip, banded fingertip are arranged.
In above-mentioned rigid contact net expansion joint, describedly decide to have columnar accumulator tank in joint and the moving joint, described annular fingertip is installed in this accumulator tank, and conduction fat is housed in this accumulator tank, describedly decides also to be provided with the sealing member that can seal cooresponding accumulator tank between joint and moving joint and the guide rail two.Conduction fat has conductive capability, can further improve current-carrying capacity, can also make to decide to keep between joint and moving joint and annular fingertip and the guide rail two lubricated, and sealing member can make conduction fat keep clean.
In above-mentioned rigid contact net expansion joint, described guide rail two fixes by the end cap that is fixed in two guide rail one two ends, has respectively on the described two end cap to be used to draw-in groove one that bus duct is passed.Make guide rail one fixing reliable by end cap, and have draw-in groove one on the end cap and can prevent that end cap from influence stretching of bus duct with guide rail two.
In above-mentioned rigid contact net expansion joint, describedly decide joint and comprise fixed block one and the fixed block two that links to each other by fastener respectively with moving joint, have a draw-in groove two that is used for fixing bus duct between the joint face of described two fixed blocks.Decide joint and moving joint is made up of the fixed block of two splits respectively, be convenient to Assembly ﹠Disassembly.
Compared with prior art, this rigid contact net expansion joint maintains static an end of bus duct, make its other end flexible in the length range of guide along with temperature Change, form a kind of plug-in type expansion pipe, and adjacent two bus ducts and this expansion pipe are located on the same straight line, help improving the degree of utilization of bus duct, are equivalent to improve the anchor segment length, compensation rate is big, generally can realize 1 meter compensation rate; And this expansion pipe is led by plate shaped guide rail one and columniform guide rail two, and mobile steady, reliable, its current-carrying performance is good, and the running velocity of train is significantly improved; Because compensation rate is big, therefore can reduce the usage quantity of this expansion pipe, make total cost cheap; In addition, every bus duct and every guide rail one all are arranged in parallel, the height that is easy to guarantee to be located in the contact wire one on two contact wires two on the bus duct between the guide rail one and two side rails one is identical, makes the pantograph smooth transition, holding current continuously, stable.
Description of drawings
Fig. 1 is the perspective view of this rigid contact net expansion joint.
Fig. 2 is the sectional structure scheme drawing of this rigid contact net expansion joint.
Fig. 3 is the A-A sectional structure scheme drawing of Fig. 2.
Fig. 4 is the B-B sectional structure scheme drawing of Fig. 2.
Fig. 5 is the C-C sectional structure scheme drawing of Fig. 2.
Fig. 6 is the M partial enlarged drawing of Fig. 2.
Among the figure, 1 decides joint; The 1a accumulator tank; 1b fixed block one; 1c fixed block two; 1d draw-in groove two; 2 moving joints; 3 contact wires one; 4 guide rails one; The 4a chute; 5 compressing tablets; 6,15 screws; 7 guide rails two; 8 annular fingertips; 9 sealing members; 10,11 end caps; 10a, 11a draw-in groove one; 12,13 bus ducts; 14 bolts; 16 cramps; 17 contact wires two; 18 banded fingertips.
The specific embodiment
Below be specific embodiments of the invention and in conjunction with the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
As Fig. 1, shown in Figure 2, this rigid contact net expansion joint connects bus duct 12,13, bus duct 12,13 are fixed on tunnel top by suspension gear, bus duct 12,13 bottom all is fixed with contact wire 2 17, the concrete structure of this joint comprise can conduct electricity decide joint 1 and moving joint 2, the coupling end of deciding joint 1 and bus duct 12 fixes, moving joint 2 fixes with the coupling end of bus duct 13, decide to be provided with the guide that is connected both and has conductive capability between joint 1 and the moving joint 2, this guide comprises making to be decided joint 1 and moving joint 2 and is located in wherein and is flat two guide rails 1, article two, guide rail 1 is parallel to the moving direction of moving joint 2, when reality is used, guide rail 1 can adopt the 6101B aluminum alloy to make, as shown in Figure 3, deciding joint 1 is made of fixed block one 1b and fixed block two 1c, two fixed block 1b, form T shape draw-in groove two 1d between the joint face of 1c, bus duct 12 is plugged in this T shape draw-in groove two 1d, two fixed block 1b, 1c is fixed on an end of two guide rails 1 by bolt 14, as shown in Figure 4, moving joint 2 also is made of fixed block one 1b and fixed block two 1c, bus duct 13 is plugged in two fixed block 1b, in T shape draw-in groove two 1d between the joint face of 1c, two fixed block 1b, 1c is by screw 15 tensions, and the head of screw 15 and afterbody all are positioned at fixed block one 1b and fixed block two 1c, can prevent that so the moving joint 2 of screw 15 obstructions from moving along the guide rail 1 of both sides, guide rail one 4 bottoms of both sides also are fixed with contact wire 1, two contact wires 1 run through the two ends of corresponding guide rail respectively, when practical set, should make two contact wires 1 and bus duct 12 in the guide rail 1, contact wire 2 17 on 13 is positioned on the sustained height, also should make contact wire 1 and contact wire 2 17 overlapping on the sense of motion of pantograph, like this, just can make pantograph from the contact wire 2 17 of bus duct after the power taking, can smooth transition to the contact wire 1 of expansion pipe, and power taking from the contact wire 1, make train obtain continuous electric current.
In order to guarantee to have certain predetermincd tension between moving joint 2 and two guide rails 1, thereby raising current-carrying capacity, can on two guide rails 1, open a chute 4a who is parallel to moving joint 2 moving directions (being the flexible direction of bus duct) respectively, as shown in Figure 4, by screw 15 respectively with compressing tablet 5 roof pressures in the outside of two guide rails 1, cooresponding fixed block one 1b and fixed block two 1c fix in chute 4a and the moving joint 2 and screw 6 passes.
In order further to increase the current-carrying capacity of expansion pipe, and to moving joint 2 reinforcement directional taggings, can between two guide rails 1, fix the in parallel and corresponding guide rail 27 of deciding joint 1 and moving joint 2 that passes, as Fig. 3, Fig. 4 and shown in Figure 5, article two, be provided with two cylindrical guide rails 27 between the guide rail 1, wherein a guide rail 27 passes fixed block one 1b that decides in joint 1 and the moving joint 2, another guide rail 27 passes fixed block two 1c that decide in joint 1 and the moving joint 2, guide rail 27 is made by conductive material (as red copper), article two, the two ends of guide rail 1 are fixed with end cap 10 respectively, 11, article two, guide rail 27 is respectively by fastener and end cap 10,11 fix, and two end cap 10,11 bottom has draw-in groove one 10a, 11a, bus duct 12,13 are connected in corresponding end cap 10,11 draw-in groove one 10a, in the 11a, and end cap 10 relatively, 11 move; The junction of deciding to be positioned on joint 1 and the moving joint 2 with guide rail 27 has accumulator tank 1a, in this accumulator tank 1a, be socketed with annular fingertip 8 respectively with conductive capability, and be filled with conduction fat in the gap between annular fingertip 8 and guide rail 27, as shown in Figure 6, decide to be socketed with respectively between the two ends of the inner of joint 1 and moving joint 2 and the guide rail 27 and be used to seal cooresponding accumulator tank and cylindrical circular sealing member 9, sealing part 9 can be made by elastomeric material, the outer end of deciding joint 1 directly seals mutually by end cap 10, and 10 while of end cap, roof pressure was in deciding on joint 1 and the guide rail 27.
In order to make two contact wires 1 fixing reliable, can be at the outside of two guide rails 1 difference static line clamping plate 16, between the adjacent surface of wireplint 16 and guide rail 1, open a groove parallel with the sense of motion of pantograph, and on the groove walls of wireplint 16 and guide rail 1, make grab respectively, and open the hook groove that system matches with grab respectively in the both sides of contact wire 1, contact wire 1 is connected in this groove, and by grab and cooperating of hook groove making contact wire 1 be stabilized on the guide rail 1.
In addition, in order to guarantee better electric conductivity, the banded fingertip 18 of also can between fixed block one 1b of two joints 1,2 and fixed block two 1c and cooresponding bus duct and two guide rails 1, pegging graft respectively; And between the guide rail 1 of two joints 1,2 and its both sides, conduction fat is housed respectively.
Claims (10)
1. rigid contact net expansion joint, be located between two bus ducts, it is characterized in that, described expansion pipe comprise can conduct electricity decide joint (1) and moving joint (2), describedly decide joint (1) and moving joint (2) and be respectively applied for the coupling end of a bus duct wherein and fix, describedly decide to be provided with the guide that is connected both and has conductive capability between joint (1) and the described moving joint (2), describedly decide joint (1) and described guide and fix, described moving joint (2) can move along guide, also is installed with on the described guide to be used for the contact wire one (3) of current delivery to the train using electricity system.
2. rigid contact net expansion joint according to claim 1, it is characterized in that, described guide comprises that two make and describedly decide joint (1) and moving joint (2) and be located in wherein and be flat guide rail one (4), described two guide rails one (4) are parallel to the moving direction of moving joint (2), describedly decide the end that joint (1) is fixed in two guide rails one (4), the other end of two guide rails one (4) is located in described moving joint (2) activity, and described contact wire one (3) is individually fixed in the bottom of two guide rails (4) and runs through the two ends of corresponding guide rail.
3. rigid contact net expansion joint according to claim 2 is characterized in that, also is respectively equipped with the roof pressure structure of the contact pressure that can regulate between the two between described moving joint (2) and described two guide rails one (4).
4. rigid contact net expansion joint according to claim 3, it is characterized in that, described roof pressure structure comprises a compressing tablet (5), has the chute (4a) that is parallel to moving joint (2) moving direction on the described guide rail one (4), in the outside of guide rail one (4), described screw (6) passes chute (4a) and fixes with moving joint (2) described compressing tablet (5) by screw (6) roof pressure.
5. according to arbitrary described rigid contact net expansion joint of claim 2-4, it is characterized in that, also be installed with in parallel between described two guide rails one (4) and pass the guide rail two (7) of deciding joint (1) and moving joint (2) respectively.
6. rigid contact net expansion joint according to claim 5 is characterized in that, described guide rail two (7) adopts conductive material to make.
7. rigid contact net expansion joint according to claim 6, it is characterized in that, described guide rail two (7) is cylindrical, and the two ends of guide rail two (7) and socket thereon decide between joint (1) and the moving joint (2) the annular fingertip (8) that socket respectively has conductive capability.
8. rigid contact net expansion joint according to claim 7, it is characterized in that, describedly decide to have columnar accumulator tank (1a) in joint (1) and the moving joint (2), described annular fingertip (8) is installed in this accumulator tank (1a), and in this accumulator tank (1a), conduction fat is housed, describedly decides also to be provided with the sealing member (9) that can seal cooresponding accumulator tank between joint (1) and moving joint (2) and the guide rail two (7).
9. rigid contact net expansion joint according to claim 8, it is characterized in that, described guide rail two (7) fixes by the end cap (10,11) that is fixed in two guide rail one (4) two ends, has respectively on the described two end cap (10,11) to be used to draw-in groove one (10a, 11a) that bus duct is passed.
10. rigid contact net expansion joint according to claim 9, it is characterized in that, describedly decide joint (1) and comprise fixed block one (1b) and the fixed block two (1c) that links to each other by fastener respectively, have a draw-in groove two (1d) that is used for fixing bus duct between the joint face of described two fixed blocks (1b, 1c) with moving joint (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101134857A CN101746281B (en) | 2010-01-30 | 2010-01-30 | Rigid contact net expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101134857A CN101746281B (en) | 2010-01-30 | 2010-01-30 | Rigid contact net expansion joint |
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| CN101746281A true CN101746281A (en) | 2010-06-23 |
| CN101746281B CN101746281B (en) | 2012-05-23 |
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|---|---|---|---|
| CN2010101134857A Active CN101746281B (en) | 2010-01-30 | 2010-01-30 | Rigid contact net expansion joint |
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| CN (1) | CN101746281B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102616155A (en) * | 2012-03-21 | 2012-08-01 | 李雷 | Inserting line mounting trolley of crank arm rigid suspension contact network |
| WO2012130582A3 (en) * | 2011-03-29 | 2013-07-11 | Siemens Aktiengesellschaft | Expansion connection arrangement for adjoining power rails of an overhead line system for electric locomotives |
| KR20150033539A (en) * | 2013-09-23 | 2015-04-01 | 비아이씨씨 홀딩스 게엠베하 | Arrangement for connecting busbar elements of a railway catenary system |
| CN104723904A (en) * | 2013-08-16 | 2015-06-24 | 浙江海洋学院 | Modified bus-bar joint device of subway tunnel |
| CN106992417A (en) * | 2017-05-11 | 2017-07-28 | 湖南华品轨道交通有限公司 | A kind of joint for connecting conductor rail |
| CN108394316A (en) * | 2018-05-10 | 2018-08-14 | 西南交通大学 | A kind of underslung rigid contact net expansion joint |
| EP3260326A4 (en) * | 2015-08-25 | 2018-10-17 | China Railway High-Speed Electrification Equipment Corporation Limited | Temperature compensation device for rigid overhead catenary |
| CN112248885A (en) * | 2020-09-21 | 2021-01-22 | 天津中铁电气化设计研究院有限公司 | Contact net device at cross crossover line |
| WO2022042675A1 (en) * | 2020-08-28 | 2022-03-03 | 富雷尔福莱电气化设备(广州)有限公司 | Busbar expansion joint |
| CN117962703A (en) * | 2024-04-01 | 2024-05-03 | 中铁建电气化局集团轨道交通器材有限公司 | Correcting device for local abrasion of rigid contact net wire |
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2010
- 2010-01-30 CN CN2010101134857A patent/CN101746281B/en active Active
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103476632B (en) * | 2011-03-29 | 2016-02-17 | 西门子公司 | For the expansion connecting device of the interconnective contact rail of the overhead contact net equipment of electric locomotive |
| WO2012130582A3 (en) * | 2011-03-29 | 2013-07-11 | Siemens Aktiengesellschaft | Expansion connection arrangement for adjoining power rails of an overhead line system for electric locomotives |
| CN103476632A (en) * | 2011-03-29 | 2013-12-25 | 西门子公司 | Expansion connection arrangement for adjoining power rails of an overhead line system for electric locomotives |
| CN102616155A (en) * | 2012-03-21 | 2012-08-01 | 李雷 | Inserting line mounting trolley of crank arm rigid suspension contact network |
| CN104723904A (en) * | 2013-08-16 | 2015-06-24 | 浙江海洋学院 | Modified bus-bar joint device of subway tunnel |
| CN104723904B (en) * | 2013-08-16 | 2017-01-04 | 浙江海洋学院 | The bus-bar joint device of the subway tunnel improved |
| KR102293167B1 (en) * | 2013-09-23 | 2021-08-25 | 레일 파워 시스템즈 게엠베하 | Arrangement for connecting busbar elements of a railway catenary system |
| EP2851235A3 (en) * | 2013-09-23 | 2015-10-21 | BICC Holdings GmbH | Device for the connection of power rail elements of a contact wire system |
| KR20150033539A (en) * | 2013-09-23 | 2015-04-01 | 비아이씨씨 홀딩스 게엠베하 | Arrangement for connecting busbar elements of a railway catenary system |
| EP3260326A4 (en) * | 2015-08-25 | 2018-10-17 | China Railway High-Speed Electrification Equipment Corporation Limited | Temperature compensation device for rigid overhead catenary |
| CN106992417A (en) * | 2017-05-11 | 2017-07-28 | 湖南华品轨道交通有限公司 | A kind of joint for connecting conductor rail |
| CN106992417B (en) * | 2017-05-11 | 2023-06-30 | 湖南华品轨道交通有限公司 | Joint for connecting conductive rail |
| CN108394316A (en) * | 2018-05-10 | 2018-08-14 | 西南交通大学 | A kind of underslung rigid contact net expansion joint |
| CN108394316B (en) * | 2018-05-10 | 2023-07-07 | 西南交通大学 | Suspension type rigid contact net expansion joint |
| WO2022042675A1 (en) * | 2020-08-28 | 2022-03-03 | 富雷尔福莱电气化设备(广州)有限公司 | Busbar expansion joint |
| CN112248885A (en) * | 2020-09-21 | 2021-01-22 | 天津中铁电气化设计研究院有限公司 | Contact net device at cross crossover line |
| CN117962703A (en) * | 2024-04-01 | 2024-05-03 | 中铁建电气化局集团轨道交通器材有限公司 | Correcting device for local abrasion of rigid contact net wire |
| CN117962703B (en) * | 2024-04-01 | 2024-05-28 | 中铁建电气化局集团轨道交通器材有限公司 | Correcting device for local abrasion of rigid contact net wire |
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| CN101746281B (en) | 2012-05-23 |
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