CN208164804U - A kind of underslung rigid contact net expansion joint - Google Patents
A kind of underslung rigid contact net expansion joint Download PDFInfo
- Publication number
- CN208164804U CN208164804U CN201820690063.8U CN201820690063U CN208164804U CN 208164804 U CN208164804 U CN 208164804U CN 201820690063 U CN201820690063 U CN 201820690063U CN 208164804 U CN208164804 U CN 208164804U
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- CN
- China
- Prior art keywords
- busbar connector
- halfbody formula
- right end
- contact net
- formula busbar
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Abstract
The utility model discloses a kind of underslung rigid contact net expansion joints, this suspension type rigid contact net expansion joints, between two busbar connectors, the expansion joints include left and right end halfbody formula busbar connector, the left and right end halfbody formula busbar connector is connected by suspension type guide part, the suspension type guide part includes flexible guided way and suspension draw-in groove, the flexible guided way is that the movement of left and right end halfbody formula busbar connector provides guide rail, and the suspension draw-in groove is connect with suspension arrangement.The quality of the utility model contact net expansion joints passes to tunnel by suspension arrangement, improves the uniformity coefficient of rigid contact net overall stiffness distribution, realizes smooth transition when pantograph passes through and continuously takes stream, guarantees the steady of bow net dynamic characteristic.
Description
Technical field
The utility model belongs to contact net technical field more particularly to a kind of underslung rigid contact net expansion joint.
Background technique
Without setting ending fitting, line-outage contingency, components will not occur for rigid contact net because of its contact line no-station pole canopy
Few, current-carrying capacity is big, securely and reliably, the features such as maintenance load is small, is widely used in subway tunnel and electric railway tunnel
In road, rigid contact net busbar connector made of aluminum alloy materials is formed with contact line made of Cu alloy material, both materials
Material all can generate thermal expansion and contraction with temperature change, and wherein the coefficient of thermal expansion of aluminium alloy is higher than the heat expansion system of copper alloy
Number.
In the arrangement of contact net, for the requirement for meeting power supply aspect and mechanical aspects, contact net is divided into several certain
Length and mutually independent segmentation, referred to as " anchor section ".Anchor section is provided with the flexibility for being conducive to improve contact net power supply, reduces thing
Therefore range, compensation device is installed.Due to the variation of environment temperature and the material property of busbar connector, need for the rigidity of each anchor section
Contact net reserves spatial position needed for telescopic moving when generating thermal expansion and contraction.Contact net is as block of bow collector of electric locomotive
Transmission line of electricity and machine sl iotadeways need to keep mechanical and electrical continuity, thus in the two neighboring anchor section of rigid contact net
Between be provided with overlap or expansion pipe (or joint).Although setting overlap can satisfy contact net as pantograph
The function of machine sl iotadeways and transmission line of electricity, but there is elasticity mutation at rigid contact net overlap, it is easy to produce impact, is ground
Consumption is serious, has an adverse effect to bow net dynamic property, and can not only compensate adjacent anchor by setting expansion pipe or joint
The thermal expansion and contraction of section rigid contact net busbar connector, adjacent anchor section is penetrated through, can also realize the smooth transition of pantograph with
Continuously take stream.
Generally use through expansion pipe at present, when which is installed, need by the connector determine connector with
Dynamic connector is fixedly connected with busbar connector respectively, by the expansion pipe can make along the longitudinally adjacent anchor section in road busbar connector penetrate through
It connects, determines connector and expansion pipe ontology synchronizing moving in expansion pipe, move the movement of connector relative expansion joint body, connect surely
Head moves towards when the temperature rises with dynamic connector, and temperature moves backward when reducing, the benefit of expanding with heat and contract with cold reserved in expansion pipe
Repaying gap is that adjacent anchor section is expanded with heat and contract with cold the summation of compensation rate, and compensation efficiency is low, and through expansion pipe requires two adjacent anchor sections
Rigid contact net collinearly arrange that installation and adjustment are cumbersome, expansion pipe be fixedly mounted on the busbar, remittance has been given in mass transfer
Stream row becomes the busbar connector at fixed installation expansion joints at one lumped mass of rigid contact net.
A kind of busbar connector expansion pipe is disclosed in 203032413 U of Chinese utility model patent CN, which passes through
Busbar connector linkage section is realized and is connect to rigidity with the connection of expansion pipe ontology and the opposite sliding of left and right ends expansion pipe ontology
The expansion pipe ontology of left and right ends is connected to by the compensation of net-fault thermal expansion and contraction by setting middle connecting plate and guide sleeve
Together, the electrical connection of left and right ends busbar connector, the expansion are also realized by the electrical connection support plate being arranged on middle connecting plate
Joint component is more, and structure is complicated, and installation and adjustment are cumbersome, and sole mass is big, by the busbar connector load-bearing at left and right both ends, is formed
At mass concentration, the uniformity coefficient of rigid contact net overall stiffness distribution is reduced, unfavorable shadow is caused to bow net dynamic property
It rings.
Utility model content
In order to overcome the shortcomings of art methods, the purpose of this utility model is that proposing that a kind of underslung rigidity connects
Net-fault expansion pipe can improve rigid contact net overall stiffness and be evenly distributed the rigid contact net expansion joints of degree；Contact
The quality of net expansion joints passes to tunnel by suspension arrangement, improves the uniformity coefficient of rigid contact net overall stiffness distribution,
It realizes smooth transition when pantograph passes through and continuously takes stream, guarantee the steady of bow net dynamic characteristic.
In order to achieve the above objectives, the technical solution adopted in the utility model is：A kind of underslung rigid contact net expansion
Connector is installed on two sections along route longitudinal direction and according between the busbar connector of constant spacing parallel arrangement；The rigid contact net is swollen
Swollen joint includes left end halfbody formula busbar connector, right end halfbody formula busbar connector and suspension type guide part, the left end halfbody formula confluence
It arranges and is connect with right end halfbody formula busbar connector by intermediate suspension type guide part, the left end halfbody formula busbar connector and left end are converged
Row is connected, and the right end halfbody formula busbar connector is connected with right end busbar connector, under the left end halfbody formula busbar connector
End fixing clamp holds contact line, and in right end halfbody formula busbar connector lower end, fixing clamp holds contact line；The suspension type guiding
Part includes that flexible guided way and suspension draw-in groove, the left end halfbody formula busbar connector protrude into the guided way I of the flexible guided way,
The right end halfbody formula busbar connector protrudes into the guided way II of the flexible guided way, the suspension draw-in groove and rigid contact net
Suspension arrangement connection；The rigid contact net expansion joints are installed on two sections along route longitudinal direction and according to the parallel cloth of constant spacing
Between the busbar connector set.
Further, the flexible guided way further includes height adjusting part, the height adjusting part is mounted on flexible lead
Into the base channel of rail.
Further, suspension type guide part bottom end is equipped with bolt, the bolt and the height adjusting part
Bottom surface is in contact.
Bolt by being mounted on suspension guiding part bottom end adjusts the height of height adjusting part, to adjust the left side
The height for holding halfbody formula busbar connector and right end halfbody formula busbar connector makes the left end halfbody formula busbar connector and right end halfbody
The contact line of formula busbar connector bottom clamping is in same contact surface, so that pantograph is from left end halfbody formula busbar connector bottom clamping
Contact line it is smooth be transitioned into the contact line of right end halfbody formula busbar connector bottom clamping, thus guarantee pantograph from an anchor section to
The smooth transition of another anchor section.
Further, the flexible guided way further includes resilient snubber, the resilient snubber passes through fastener
It is mounted on the top of flexible guided way, suspension type rigid contact net expansion joints entirety can be promoted by elastic buffer mat piece
Elasticity, to improve its service life and safety coefficient.
Further, on the left end halfbody formula busbar connector, right end halfbody formula busbar connector and suspension type guide part
It is provided with electrical connection mounting seat, copper braid over braid is installed in the electrical connection mounting seat；Realize left end halfbody formula confluence
Row and being electrically connected between right end halfbody formula busbar connector, are able to maintain busbar connector electrical continuity, realize when pantograph passes through
Continuously take stream.
Further, being fixedly installed with hook-shaped contact line clamping plate by fastener on the left end halfbody formula busbar connector
I, the hook-shaped contact line clamping plate I and left end halfbody formula busbar connector clamping contact line；It is logical in the right end halfbody formula busbar connector
It crosses fastener and is fixedly installed with hook-shaped contact line clamping plate II, the hook-shaped contact line clamping plate II and the clamping of right end halfbody formula busbar connector
Contact line；So that contact line is longitudinally there is the space overlap of regular length along route, guarantees machine sl iotadeways when pantograph slides past
With the continuity of transmission line of electricity, stationarity when ensuring that pantograph slides through, and meet in pantograph operation and continuously take stream
Requirement.
Further, being provided with the increasing of regular length in the left end halfbody formula busbar connector and left end busbar connector junction
Strong part I, the reinforcement I are connect by fastener with the left end halfbody formula busbar connector；In the right end halfbody formula busbar connector
The reinforcement II of regular length is provided with right end busbar connector junction, the reinforcement II passes through fastener and the right end half
The connection of body formula busbar connector, the rigidity of halfbody formula busbar connector can be improved in the setting of reinforcement, make halfbody formula busbar connector rigidity and
The rigidity of busbar connector is consistent, it is ensured that the uniformity coefficient of rigid contact net overall stiffness distribution.
Using the beneficial effect of the technical program：
The utility model proposes the suspension draw-in grooves that suspension type rigid contact net expansion joints pass through suspension type guide part top
It connect realization suspension with the suspension arrangement of rigid contact net to fix, by the mass transfer of expansion joints to tunnel, avoids the formation of matter
In quantity set, the uniformity coefficient of rigid contact net overall stiffness distribution is improved, the flexible guided way of suspension type guide part is a left side
The free extension movement of right both ends busbar connector provides guiding performance and abundant mobile space, the rigid contact net of two adjacent anchor sections
Between it is flexible carried out respectively along two different guided ways, be independent of each other；
The compensation efficiency of rigid contact net expansion joints can be improved in the utility model, reserves needed for through expansion joints
Gap be compensation gap needed for the busbar connector of both ends and；Due to the sky of left and right both ends halfbody formula busbar connector in the utility model
Between overlap, the maximum value in compensation gap needed for making the reserved compensation both ends gap Zhi Xuqu busbar connector needed for its；Gu
The resilient snubber that Dingan County is mounted at the top of flexible guided way can promote the elasticity of rigid contact net expansion joints entirety, avoid by
Pantograph by when generate impact；The height adjusting part being set in flexible guided way base channel and suspension type guide part bottom end are installed
Bolt to adjust left and right ends halfbody formula busbar connector clamping contact line, so that it is in same contact surface；Left end halfbody formula
Busbar connector is connected with left end busbar connector, and right end halfbody formula busbar connector is connected with right end busbar connector, left and right ends halfbody
Formula busbar connector maintained with left and right ends busbar connector it is mechanical with electrically continuity, along the halfbody formula busbar connector of left and right ends
Longitudinally there is the space overlap of regular length in road, realize smooth transition when pantograph passes through；
The utility model is mounted on left end halfbody formula busbar connector, right end halfbody formula busbar connector and suspension type guiding by setting
Copper braid over braid is mounted in electrical connection mounting seat by the electrical connection mounting seat on part, keeps left and right ends halfbody formula confluence
The electrical continuity of row is realized and continuously takes stream, the entirety of entire suspension type rigid contact net expansion joints when pantograph passes through
Structure is simple, feature-rich, installs, is easy to adjust.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of underslung rigid contact net expansion joint of the utility model；
Fig. 2 is the side view that underslung rigid contact net expansion joint is planted in the utility model embodiment；
Fig. 3 is the structural schematic diagram of left end halfbody formula busbar connector in the utility model embodiment；
Fig. 4 is the structural schematic diagram of right end halfbody formula busbar connector in the utility model embodiment；
Fig. 5 is the structural schematic diagram of the utility model embodiment centre mounted type guide part；
Fig. 6 is the structural schematic diagram of resilient snubber in the utility model embodiment；
Fig. 7 is the structural schematic diagram of height adjusting part in the utility model embodiment；
Wherein, 1 is left end halfbody formula busbar connector, and 2 be right end halfbody formula busbar connector, and 3 be contact line, and 41 be guided way I, 42
It is guided way II, 5 be suspension draw-in groove, and 6 be height adjusting part, and 7 be resilient snubber, and 81 be hook-shaped contact line clamping plate I, and 82 be to hook
Shape contact line clamping plate II, 9 be suspension type guide part, and 101 be reinforcement I, and 102 be reinforcement II, and 11 left end busbar connectors, 12 be right
Busbar connector is held, 13 be electrical connection mounting seat, and 14 be copper braid over braid, and 15 be bolt, and 16 be base channel.
Specific embodiment
It is practical new to this with reference to the accompanying drawing in order to keep the purpose of this utility model, technical solution and advantage clearer
Type is further elaborated.
In the present embodiment, refer to figures 1-7, the utility model proposes a kind of underslung rigid contact net is swollen
Expanded joint head, the rigid contact net expansion joints are installed on two sections along the remittance that route is longitudinal and is arranged in parallel according to constant spacing
Between stream row；The rigid contact net expansion joints include left end halfbody formula busbar connector 1, right end halfbody formula busbar connector 2 and suspension
Formula guide part 9, the left end halfbody formula busbar connector 1 are connected with right end halfbody formula busbar connector 2 by intermediate suspension type guide part 9
It connects, the left end halfbody formula busbar connector 1 is connected with left end busbar connector 11, and the right end halfbody formula busbar connector 2 converges with right end
Stream row 12 is connected, and holds contact line 3 in the 1 lower end fixing clamp of left end halfbody formula busbar connector, in the right end halfbody formula
2 lower end fixing clamp of busbar connector holds contact line 3；The suspension type guide part 9 includes flexible guided way and suspension draw-in groove 5, described
Left end halfbody formula busbar connector 1 protrudes into the guided way I 41 of the flexible guided way, and the right end halfbody formula busbar connector 2 protrudes into institute
It states in the guided way II 42 of flexible guided way, the suspension draw-in groove 5 is connect with the suspension arrangement of rigid contact net
In the specific implementation：
As shown in Fig. 1-Fig. 7, this suspension type rigid contact net expansion joints connect busbar connector 11,12, busbar connector 11, left end
Halfbody formula busbar connector 1 and right end halfbody formula busbar connector 2 and busbar connector 12 are cut by the busbar connector of a root long 12m by " Z " font
It obtaining, left end halfbody formula busbar connector 1 is connected with busbar connector 11, and right end halfbody formula busbar connector 2 is connected with busbar connector 12,
Left end halfbody formula busbar connector 1 and 2 length of right end halfbody formula busbar connector are 2.5m, to left end and right end busbar connector because of temperature change
And the compensating length of the thermal expansion and contraction generated is 500mm, busbar connector 11,12 is fixed by rigid contact net suspension arrangement
In tunnel top, halfbody formula busbar connector 1 bottom in left end is equipped with hook-shaped contact line clamping plate I 81, left end halfbody formula by fastener
Busbar connector 1 and hook-shaped contact line clamping plate I 81 complete the clamping to contact line 3, left end halfbody formula busbar connector 1 and busbar connector 11 jointly
Continuity is remain in machinery and electrically, 2 bottom of right end halfbody formula busbar connector is fixedly installed with hook-shaped contact by fastener
Wireplint II 82, right end halfbody formula busbar connector 2 and hook-shaped contact line clamping plate II 82 complete the clamping to contact line 3, right end jointly
Halfbody formula busbar connector 2 and busbar connector 12 remain in machinery and electrically continuity, and copper conjunction can be used in " hook " shape contact line clamping plate
Gold manufactures；Left end halfbody formula busbar connector 1 is connect with right end halfbody formula busbar connector 2 by the suspension type guide part 9 of long 2m, installation
When longitudinally there is length along route with right end halfbody formula busbar connector 2 according to left end halfbody formula busbar connector 1 when minimum environment temperature
The space overlap of 2m carries out installation calculating, and aluminium alloy can be used to manufacture in suspension type guide part 9, and suspension type guide part 9 includes stretching
Contracting guided way, left end halfbody formula busbar connector 1 protrude into a guided way I 41 of flexible guided way, and right end halfbody formula busbar connector 2 is stretched
Enter in another guided way II 42 of flexible guided way, the cloth parallel with right end halfbody formula busbar connector 2 of left end halfbody formula busbar connector 1
Set, keep the constant spacing of 40mm, rigid contact net busbar connector be affected by temperature when expanding with heat and contract with cold left end halfbody formula busbar connector 1 with
The telescopic moving of right end halfbody formula busbar connector 2 is not interfere with each other；Suspension type guide part further includes suspension draw-in groove 5, suspension draw-in groove 5 and just
Property overhead contact line device connection, by the mass transfer of rigid contact net expansion joints to tunnel.
Meanwhile the degree that is evenly distributed in order to guarantee suspension type rigid contact net expansion joints overall stiffness, in left end half
Body formula busbar connector 1 and 11 junction of left end busbar connector are provided with the rigidity reinforcement I 101 that length is 600mm by fastener,
Right end halfbody formula busbar connector 2 and 12 junction of right end busbar connector are provided with the rigidity reinforcement that length is 600mm by fastener
II 102, aluminium alloy can be used to manufacture in rigidity reinforcement.
In addition, in order to guarantee the electrical continuity between left end halfbody formula busbar connector 1 and right end halfbody formula busbar connector 2, it is real
Stream continuously is taken when existing pantograph passes through, in suspension type guide part 9 and left end halfbody formula busbar connector 1 and right end halfbody formula busbar connector
It is respectively provided on 2 and electrical connection erection support 13 is installed, the copper that length is 400mm is installed on electrical connection erection support 13 and is woven
Band 14, copper braid over braid 14 changes curved shape adaptation halfbody formula and converges when left and right ends halfbody formula busbar connector is moved along the guided way that stretches
Movement of the stream row relative to flexible guided way, 13 length of electrical connection support being mounted on the halfbody formula busbar connector of left and right ends are
230mm, holding copper braid over braid 14 so that it will not drop influences passing through for pantograph, and copper alloy can be used in electrical connection erection support
To manufacture.
As shown in Fig. 2, the height of left end halfbody formula busbar connector 1 and right end halfbody formula busbar connector 2 is adjusted for convenience,
The contact line 3 of left and right ends halfbody formula busbar connector bottom clamping is set to be in same contact plane, in the base channel of flexible guided way
Height adjusting part 6 is installed, height adjusting part 6 can be used rubber to manufacture, pacify by adjusting suspension guide part bottom end in 16
The bolt 15 of dress adjusts the position of height adjusting part 6, to adjust left end halfbody formula busbar connector 1 and right end halfbody formula busbar connector 2
Height, it is ensured that the contact line 3 of left and right both ends halfbody formula busbar connector bottom clamping is realized by electricity in same contact plane
Smooth transition when bow passes through；For the elasticity for promoting this suspension type rigid contact net expansion joints itself entirety, pantograph is avoided
By when generate impact, "eight" shape resilient snubber 7 is fixedly installed with by fastener at the top of flexible guided way, " eight "
The up and down of halfbody formula busbar connector that be set as of font resilient snubber 7 provides the surplus of spatial variations, enhances left end
The smoothness of halfbody formula busbar connector 1 and right end halfbody formula busbar connector 2 telescopic moving in flexible guided way, "eight" shape elasticity are slow
55Si2Mn spring steel can be used to manufacture in stamping 7.
Basic principles, main features, and advantages of the present invention has been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (7)
1. a kind of underslung rigid contact net expansion joint, which is characterized in that the rigid contact net expansion joints are installed on
Two sections along route longitudinal direction and according between the busbar connector of constant spacing parallel arrangement；The rigid contact net expansion joints include a left side
Hold halfbody formula busbar connector (1), right end halfbody formula busbar connector (2) and suspension type guide part (9), the left end halfbody formula busbar connector
(1) it is connect with right end halfbody formula busbar connector (2) by intermediate suspension type guide part (9), the left end halfbody formula busbar connector (1)
It is connected with left end busbar connector (11), the right end halfbody formula busbar connector (2) is connected with right end busbar connector (12), in institute
It states left end halfbody formula busbar connector (1) lower end fixing clamp and holds contact line (3), it is solid in right end halfbody formula busbar connector (2) lower end
Clamp holds contact line (3)；The suspension type guide part (9) includes flexible guided way and suspension draw-in groove (5), the left end halfbody
Formula busbar connector (1) protrudes into the guided way I (41) of the flexible guided way, and the right end halfbody formula busbar connector (2) is protruded into described
In the guided way II (42) of flexible guided way, the suspension draw-in groove (5) connect with the suspension arrangement of rigid contact net.
2. a kind of underslung rigid contact net expansion joint according to claim 1, which is characterized in that described stretch is led
It further include height adjusting part (6) to rail, the height adjusting part (6) is mounted in the base channel (16) of flexible guided way.
3. a kind of underslung rigid contact net expansion joint according to claim 2, which is characterized in that the suspension type
Guide part (9) bottom end is equipped with bolt (15), and the bolt (15) is in contact with the bottom surface of the height adjusting part (6).
4. a kind of underslung rigid contact net expansion joint according to claim 1 to 3, which is characterized in that institute
Stating flexible guided way further includes resilient snubber (7), and the resilient snubber (7) is mounted on flexible guided way by fastener
Top.
5. a kind of underslung rigid contact net expansion joint according to claim 1, which is characterized in that in the left end
Electrical connection mounting seat is provided on halfbody formula busbar connector (1), right end halfbody formula busbar connector (2) and suspension type guide part (9)
(13), copper braid over braid (14) are installed on the electrical connection mounting seat (13).
6. a kind of underslung rigid contact net expansion joint according to claim 1 or 5, which is characterized in that described
Hook-shaped contact line clamping plate I (81), the hook-shaped contact line are fixedly installed with by fastener on left end halfbody formula busbar connector (1)
Clamping plate I (81) and left end halfbody formula busbar connector (1) clamping contact line (3)；Pass through fastening in the right end halfbody formula busbar connector (2)
Part is fixedly installed with hook-shaped contact line clamping plate II (82), the hook-shaped contact line clamping plate II (82) and right end halfbody formula busbar connector
(2) clamping contact line (3).
7. a kind of underslung rigid contact net expansion joint according to claim 6, which is characterized in that in the left end
Halfbody formula busbar connector (1) and left end busbar connector (11) junction are provided with the reinforcement I (101) of regular length, the reinforcement I
(101) it is connect by fastener with the left end halfbody formula busbar connector (1)；In the right end halfbody formula busbar connector (2) and right end
Busbar connector (12) junction is provided with the reinforcement II (102) of regular length, and the reinforcement II (102) passes through fastener and institute
State right end halfbody formula busbar connector (2) connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820690063.8U CN208164804U (en) | 2018-05-10 | 2018-05-10 | A kind of underslung rigid contact net expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820690063.8U CN208164804U (en) | 2018-05-10 | 2018-05-10 | A kind of underslung rigid contact net expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208164804U true CN208164804U (en) | 2018-11-30 |
Family
ID=64366701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820690063.8U Expired - Fee Related CN208164804U (en) | 2018-05-10 | 2018-05-10 | A kind of underslung rigid contact net expansion joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208164804U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108394316A (en) * | 2018-05-10 | 2018-08-14 | 西南交通大学 | A kind of underslung 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 |
-
2018
- 2018-05-10 CN CN201820690063.8U patent/CN208164804U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181130 |
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| CF01 | Termination of patent right due to non-payment of annual fee |