Rigid-flexible transition device for railway contact net
By introducing a dual transition design of auxiliary contact lines and rigid-flexible transition busbars into the railway contact network, the problem of large impact of pantograph during high-speed operation is solved, the quality and service life of the current is improved, and the electrical connection is ensured. stability.
Patent Information
- Application Number
- CN202421098831.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-20
AI Technical Summary
The existing railway contact network rigid-flexible transition device has a large impact during pantograph transition during high-speed operation, and is limited in adaptability, making it difficult to ensure smooth transition and efficient current transmission.
Design a rigid-flexible transition device for railway contact networks. By setting auxiliary contact lines and rigid-flexible transition busbars, the double transition of the contact network is realized, reducing the impact of the pantograph, improving the flow quality, and adjusting the clamp of the groove line Connecting with wires ensures reliability of electrical connections.
The smooth transition of the pantograph is achieved, the arc is reduced, the current quality and service life of the pantograph is improved, and the stability of the electrical connection is ensured.
Smart Images
Figure CN222310423U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of rail transit power supply, and more specifically to a rigid-flexible transition device for a railway contact network. Background Art
[0002] The transition between the flexible contact network and the rigid contact network is a weak link in the entire high-speed railway system. The switch between the rigid contact network and the flexible contact network will face many harsh conditions, such as changes in the working height of the pantograph, changes in the elasticity of the contact network, and changes in the wind pressure at the tunnel entrance. There are two main rigid-flexible multi-transition methods: one is the transition form of the anchor section joint, in which the pantograph achieves the transition through the climbing point of the rigid contact network and the flexible contact network. The flexible contact network is lifted, while the rigid contact network has almost no lift. This transition method has a relatively large impact on the pantograph and is suitable for low-speed operation. The second is the transition method of the slotted original, that is, the rigid-flexible transition busbar, which reduces the rigidity of the busbar and improves the smoothness of the transition. The adaptation speed is higher than that of the anchor section joint method. However, since the rigidity of the slotted original is still much higher than that of the flexible suspension, there are limitations in improving the pantograph-net characteristics of the high-speed pantograph.
[0003] Therefore, how to provide a rigid-flexible transition device for railway contact network so as to overcome the above problems is an urgent problem to be solved by those skilled in the art. Utility Model Content
[0004] In view of this, the utility model provides a rigid-flexible transition device for a railway contact network.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A rigid-flexible transition device for a railway contact network is installed at the connection between a flexible contact network and a rigid contact network, the flexible contact network includes a load-bearing cable and a contact wire for the flexible contact network suspended below the load-bearing cable by a pull wire, the rigid contact network includes a busbar fixed to the top of a tunnel, the lower side of the busbar is clamped and electrically connected with a contact wire for the rigid contact network, the load-bearing cable is fixed to the inner wall of the tunnel at one end close to the tunnel, and the contact wire for the flexible contact network is fixed to the inner wall of the tunnel at one end close to the tunnel; an auxiliary contact wire is arranged in parallel above the contact wire for the flexible contact network, the contact wire for the flexible contact network and the auxiliary contact wire are fixed by a plurality of parallel groove wire clamps, the plurality of parallel groove wire clamps are arranged in sequence along the length direction of the contact wire for the flexible contact network, and the auxiliary contact wire is connected to the flexible contact network from the flexible contact network. In the direction from the contact wire to the bus, the spacing between two adjacent parallel groove wire clamps gradually decreases, and the two adjacent parallel groove wire clamps are fixedly connected by a connecting rod; a rigid-flexible transition bus is fixed on the top of the tunnel, the auxiliary contact wire is electrically connected to the rigid-flexible transition bus, the lower side of the rigid-flexible transition bus is clamped and electrically connected with the flexible contact network contact wire, the bus and the rigid-flexible transition bus are electrically connected through a conductor, a plurality of grooves are provided on the upper side of the rigid-flexible transition bus, and the groove depths of the plurality of grooves gradually decrease from the flexible contact network contact wire to the bus; the end of the rigid contact network contact wire is constructed to gradually descend from a high point to be arranged on the same horizontal plane as the flexible contact network contact wire corresponding to the position of the rigid-flexible transition bus.
[0007] It can be seen from the above technical solution that compared with the prior art, the utility model discloses a rigid-flexible transition device for a railway contact network. The utility model sets two transitions, namely an auxiliary contact line and a rigid-flexible transition bus. This setting can achieve the connection between the rigid contact network and the flexible contact network, ensure the smooth transition of the pantograph, reduce the impact of the pantograph when passing through the transition device, reduce arcing, improve the current collection quality of the pantograph, and extend the service life of the pantograph.
[0008] Preferably, it further comprises an electrical connection line, through which the load-bearing cable and the auxiliary contact line are electrically connected. This arrangement ensures that the load-bearing cable and the auxiliary contact line can be electrically connected.
[0009] Preferably, two electrical connection wires are provided, which ensures that the load-bearing wire and the auxiliary contact wire can be reliably electrically connected.
[0010] Preferably, the overall length of the rigid-flexible transition busbar is 6 meters, and the plurality of grooves are arranged equidistantly along the length direction of the rigid-flexible transition busbar. This arrangement ensures that the rigid-flexible transition busbar has a good rigid-flexible transition effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0012] Figure 1 It is a front view schematic diagram of a rigid-flexible transition device for railway contact network;
[0013] Figure 2 yes Figure 1 A partial enlarged view of the middle A;
[0014] Figure 3 yes Figure 1 A partial enlarged view of point B in the middle;
[0015] Figure 4 It is a top view schematic diagram of a rigid-flexible transition device for railway contact network;
[0016] Figure 5 yes Figure 4 A partial enlarged view of point C in the middle;
[0017] Figure 6 It is an axonometric diagram of a rigid-flexible transition busbar in a rigid-flexible transition device for a railway overhead contact network;
[0018] Figure 7 The diagram is a front view of a rigid-flexible transition busbar in a rigid-flexible transition device for a railway contact network.
[0019] In the figure:
[0020] 1 is the load-bearing cable, 2 is the guy wire, 3 is the contact wire for the flexible contact network, 4 is the busbar, 5 is the contact wire for the rigid contact network, 6 is the tunnel, 7 is the auxiliary contact wire, 8 is the parallel groove clamp, 9 is the rigid-flexible transition busbar, 90 is the groove, 10 is the conductor, 11 is the electrical connecting wire, 12 is the cantilever support device, and 13 is the tension insulator. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0022] The utility model discloses a rigid-flexible transition device for railway contact network. The utility model sets two transitions, namely, auxiliary contact wire 7 and rigid-flexible transition bus 9. This setting can realize the connection between rigid contact network and flexible contact network, ensure the smooth transition of pantograph, reduce the impact of pantograph when passing through the transition device, reduce arcing, improve the current-collecting quality of pantograph, and extend the service life of pantograph. The above structure is simple and reliable. By adjusting the number and spacing of parallel groove wire clamps 8, the elastic linear change of the overall structure composed of contact wire 3 and auxiliary contact wire 7 for flexible contact network can be realized to meet various speed operation requirements; by setting conductor 10 and electrical connection wire 11, this setting ensures that bus 4 and rigid-flexible transition bus can be reliably electrically connected, and load-bearing cable 1 and auxiliary contact wire 7 can also be reliably electrically connected, thereby improving the stability of transition device.
[0023] Example
[0024] See attached Figure 1-7 The utility model is a schematic diagram of the overall and partial structures of an embodiment of the utility model. The utility model specifically discloses a rigid-flexible transition device for railway contact network, which is installed at the connection between the flexible contact network and the rigid contact network. The flexible contact network includes a load-bearing cable 1 and a contact wire 3 for the flexible contact network suspended below the load-bearing cable 1 through a tension wire 2. The rigid contact network includes a bus 4 fixed to the top of the tunnel 6 through a cantilever support device 12. A contact wire 5 for the rigid contact network is clamped and electrically connected to the lower side of the bus 4. The outer diameters of the contact wire 3 for the flexible contact network and the contact wire 5 for the rigid contact network are the same.
[0025] One end of the catenary cable 1 close to the tunnel 6 is fixed to the inner wall of the tunnel 6 and a tension insulator 13 is connected in series between the two. One end of the flexible contact network contact wire 3 close to the tunnel 6 is fixed to the inner wall of the tunnel 6 and a tension insulator 13 is connected in series between the two. The purpose of setting the tension insulator 13 is to ensure that the catenary cable 1 and the flexible contact network contact wire 3 are insulated from the inner wall of the tunnel 6.
[0026] An auxiliary contact line 7 is arranged parallel to the top of the flexible contact network contact line 3. The flexible contact network contact line 3 and the auxiliary contact line 7 are fixed by multiple parallel groove line clamps 8. The multiple parallel groove line clamps 8 are arranged in sequence along the length direction of the flexible contact network contact line 3. From the flexible contact network contact line 3 to the bus 4, the distance between two adjacent parallel groove line clamps 8 gradually decreases. It should be noted here that the length of the auxiliary contact line 7 depends on the train speed. The higher the train speed, the longer the auxiliary contact line 7; the adjacent two parallel groove line clamps 8 are fixedly connected by a connecting rod (not shown in the figure), and from the flexible contact network contact line 3 to the bus 4, each connecting rod is gradually thickened, which is more conducive to transition.
[0027] A rigid-flexible transition busbar 9 is fixed on the top of the tunnel 6, and one end of the auxiliary contact wire 7 close to the tunnel 6 is electrically connected to the end of the rigid-flexible transition busbar 9. A flexible contact network contact wire 3 is clamped and electrically connected to the lower side of the rigid-flexible transition busbar 9. The busbar 4 and the rigid-flexible transition busbar 9 are electrically connected through multiple conductors 10. A plurality of grooves 90 are provided on the upper side of the rigid-flexible transition busbar 9. In the direction from the flexible contact network contact wire 3 to the busbar 4, the groove depth of the plurality of grooves 90 gradually decreases;
[0028] The end of the rigid contact network contact wire 5 is configured to gradually descend from a high point to the same horizontal plane as the flexible contact network contact wire 3 corresponding to the position of the rigid-flexible transition busbar 9. Figure 1 and Figure 4 The positional relationship is explained, and the up, down, left, and right directions are Figure 1 The rigid contact network contact wire 5 is arranged at the lower part of the bus 4, and the flexible contact network contact wire 3 is arranged at the lower part of the rigid-flexible transition bus 9. The lower left end of the bus 4 is constructed as an upwardly tilted inclined surface or arc surface, so that the left end of the rigid contact network contact wire 5 is tilted upward, that is, the left end of the rigid contact network contact wire 5 is a high point and is higher than the horizontal plane where the flexible contact network contact wire 3 is located. The total left-to-right height of the rigid contact network contact wire 5 is gradually reduced to the same horizontal plane as the flexible contact network contact wire 3. In this way, it is ensured that the pantograph (not shown in the figure) located below the two can be electrically disconnected from the flexible contact network contact wire 3 and electrically connected to the rigid contact network contact wire 5. When the pantograph moves from left to right, the left end of the rigid contact network contact wire 5 tilts and gradually drops to the level of the flexible contact network contact wire 3, which can make the pantograph switch between the two smoother.
[0029] The load-bearing cable 1 and the auxiliary contact wire 7 are electrically connected via two electrical connection wires 11 , so that the load-bearing cable 1 and the auxiliary contact wire 7 can be reliably electrically connected.
[0030] In this embodiment, the overall length of the rigid-flexible transition bus 9 is 6 meters, and 8 grooves 90 are provided on each rigid-flexible transition bus 9. The 8 grooves 90 are equidistantly arranged along the length direction of the rigid-flexible transition bus 9, and the interval distance between each groove 90 is 50 mm. The maximum groove length of the groove 90 is 550 mm, the minimum groove length of the groove 90 is 350 mm, the maximum groove depth of the groove 90 is 100 mm, and the minimum groove depth of the groove 90 is 60 mm.
[0031] The pantograph of the train slides against the contact wire 3 for the flexible contact network. When the pantograph slides to the position corresponding to the auxiliary contact wire 7, the distance between the two adjacent parallel groove clamps 8 gradually decreases from the flexible contact wire 3 to the bus 4. Therefore, the rigidity of the overall structure composed of the flexible contact wire 3 and the auxiliary contact wire 7 is a gradual increase process; the pantograph slides further, and when it slides to the position corresponding to the rigid-flexible transition bus 9, the depth of the multiple grooves 90 gradually decreases from the flexible contact wire 3 to the bus 4. Therefore, the rigidity of the overall structure composed of the flexible contact wire 3 and the rigid-flexible transition bus 9 is a gradual increase process. After the pantograph slides over the rigid-flexible transition bus 9, it begins to slide against the rigid contact wire 5. At this point, a flexible transition process from the flexible contact network to the rigid contact network is completed. The transition from the rigid contact network to the flexible contact network is the opposite of the above process.
[0032] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0033] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A rigid-flexible transition device for a railway contact network, installed at the connection between a flexible contact network and a rigid contact network, wherein the flexible contact network comprises a load-bearing cable (1) and a contact wire (3) for the flexible contact network suspended below the load-bearing cable (1) through a tension wire (2), and the rigid contact network comprises a busbar (4) fixed to the top of a tunnel (6), and a contact wire (5) for the rigid contact network is clamped and electrically connected to the lower side of the busbar (4), characterized in that: The end of the load-bearing cable (1) close to the tunnel (6) is fixed to the inner wall of the tunnel (6), and the end of the flexible contact wire (3) close to the tunnel (6) is fixed to the inner wall of the tunnel (6); an auxiliary contact wire (7) is arranged above the flexible contact wire (3) in parallel, and the flexible contact wire (3) and the auxiliary contact wire (7) are fixed by a plurality of parallel groove wire clamps (8); the plurality of parallel groove wire clamps (8) are arranged in sequence along the length direction of the flexible contact wire (3); in the direction from the flexible contact wire (3) to the busbar (4), the distance between two adjacent parallel groove wire clamps (8) gradually decreases, and the two adjacent parallel groove wire clamps (8) are fixedly connected by a connecting rod; the tunnel (6) A rigid-flexible transition busbar (9) is fixed at the inner top, the auxiliary contact wire (7) is electrically connected to the rigid-flexible transition busbar (9), the lower side of the rigid-flexible transition busbar (9) is clamped and electrically connected to the contact wire (3) for the flexible contact network, the busbar (4) and the rigid-flexible transition busbar (9) are electrically connected through a conductor (10), a plurality of grooves (90) are provided on the upper side of the rigid-flexible transition busbar (9), and the groove depths of the plurality of grooves (90) gradually decrease in the direction from the contact wire (3) for the flexible contact network to the busbar (4); the end of the rigid contact network contact wire (5) is constructed to gradually decrease from a high point to be arranged on the same horizontal plane as the flexible contact network contact wire (3) corresponding to the position of the rigid-flexible transition busbar (9).
2. A rigid-flexible transition device for railway contact network according to claim 1, characterized in that: It also comprises an electrical connection line (11), through which the load-bearing cable (1) and the auxiliary contact line (7) are electrically connected.
3. The rigid-flexible transition device for railway contact network according to claim 2, characterized in that: Two electrical connection lines (11) are provided.
4. The rigid-flexible transition device for railway contact network according to claim 1, characterized in that: The overall length of the rigid-flexible transition busbar (9) is 6 meters, and the plurality of grooves (90) are arranged equidistantly along the length direction of the rigid-flexible transition busbar (9).