A large-span rigid overhead contact network suspension system for viaduct conditions

Abstract

The present invention provides a large-span rigid contact network suspension system for elevated bridge working conditions, including a crossbeam, a cable-type suspension structure, a tie-rod suspension structure, a crossbeam position suspension structure and a busbar, wherein the bridge pier is located between two adjacent crossbeams, the busbar is suspended on the crossbeam through the cable-type suspension structure, the tie-rod suspension structure and the crossbeam position suspension structure, the crossbeam position suspension structure is located below the crossbeam, the cable-type suspension structure and the tie-rod suspension structure are both located between two adjacent crossbeams, the tie-rod suspension structure is connected to the crossbeam located in the middle of the busbar anchor section, and the busbar located at the maximum pull-out value of the busbar adopts a pre-bent busbar. The present invention has a large installation span, convenient adjustment, small lateral stress, and adaptability to lower clearance, and realizes the installation and suspension of the contact network and smooth flow transfer under elevated bridge working conditions such as multi-layer interchanges.

Description

Technical Field

[0001] The invention belongs to the technical field of rail transportation, and in particular relates to a large-span rigid contact network suspension system for viaduct working conditions. Background Art

[0002] Rigid contact network is commonly used in underground sections of urban rail transit and is a common contact network design for traction power supply. At present, flexible contact network is widely used in elevated sections at home and abroad. Flexible contact network ensures the smoothness of the contact line by installing suspension strings at certain intervals through the load-bearing cables, and the load-bearing cables themselves are in a catenary state; rigid contact network ensures the smoothness of the contact line through busbars with greater rigidity and weight, and its characteristic is that the spacing between suspension points is small.

[0003] With the development of cities, overpasses, especially multi-layer overpasses, are becoming more and more common in cities, and the construction height of elevated rail transit is constantly shrinking. The flexible suspension of the contact network is limited in application due to the shortest requirements for the suspension string and the minimum installation clearance requirements for the catenary-type load-bearing cables in space. At present, the rigid contact network is subject to the high investment caused by the exponential increase in the number of suspension points, and there is no implementation example of the rigid contact network applied to elevated working conditions. At the same time, the traditional rigid contact network has a small suspension span, and dense and continuous structures are required above the line to install the bus suspension device, which has poor aesthetics; different suspension points will have lateral stress due to the adjustment of the pull-out value. Long-term lateral stress may cause the pull-out value at the suspension point to change, which will lead to a decrease in the current transfer performance of the bow network, forcing the reliability of the rail transit power supply system to decrease. Summary of the invention

[0004] The present invention aims at the shortcomings of the existing rigid suspension scheme, and aims at the actual working condition of low installation clearance at the viaduct pier position, and uses a suspension device composed of a cable and a sliding busbar clamp to provide a large-span rigid contact network suspension system for viaduct working conditions. The present invention has a large installation span, moderate cost, convenient adjustment, small lateral stress, and adaptability to low clearance, and can realize the installation and suspension of the contact network and stable current delivery under viaduct working conditions such as multi-layer interchanges.

[0005] The technical solution adopted in the present invention is: a large-span rigid contact network suspension system for elevated bridge working conditions, including a crossbeam, a cable-type suspension structure, a tie-rod suspension structure, a crossbeam position suspension structure and a bus, the pier is located between two adjacent crossbeams, the bus is suspended on the crossbeam through the cable-type suspension structure, the tie-rod suspension structure and the crossbeam position suspension structure, the crossbeam position suspension structure is located below the crossbeam, the cable-type suspension structure and the tie-rod suspension structure are both located between two adjacent crossbeams, the tie-rod suspension structure is connected to the crossbeam located in the middle of the anchor section, and the bus located at the maximum pull-out value of the bus adopts a pre-bent bus.

[0006] Furthermore, one crossbeam is provided for every three spans.

[0007] Furthermore, the crossbeam position suspension structure includes a busbar clamp A, a suspension insulator, an adjustment plate and a clamp, the busbar clamp A is connected to the suspension insulator, the suspension insulator is connected to the adjustment plate, and the adjustment plate is fixed to the crossbeam through a clamp.

[0008] Furthermore, the cable-type suspension structure includes a busbar clamp B, a cable, a lower anchor insulator and an anchor, wherein the anchor is fixed on the crossbeam, the busbar clamp B is connected to the anchor via a cable, and a lower anchor insulator is provided on the cable between the busbar clamp B and the anchor.

[0009] Further, the number of the busbar clamps B between the adjacent crossbeams is one or two. When the number of the busbar clamps B is two, one side of the busbar clamp B is connected to the anchor by a cable, and the other side is connected to the adjacent busbar clamp B by a cable; when the number of the busbar clamp B is one, both sides of the busbar clamp B are connected to the anchor by cables.

[0010] Furthermore, the pull rod type suspension structure comprises a center anchor wire clamp, a pull rod, an insulating rod, an adjusting bolt and an anchor, wherein the center anchor wire clamp, the pull rod, the insulating rod, the adjusting bolt and the anchor are connected in sequence, and the anchor is fixed on the cross beam.

[0011] Furthermore, the bus is slidably connected to the cable-type suspension structure and the beam position suspension structure; the bus is fixedly connected to the pull-rod-type suspension structure.

[0012] Furthermore, cross beams are densely arranged at the joints of the anchor sections, longitudinal steel beams are arranged between the cross beams, and the suspension structure at the cross beam position is fixed on the cross beams or the steel beams.

[0013] Furthermore, the crossbeam is made of round steel pipe or H-shaped steel.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The present invention optimizes the overhead contact network suspension structure, increases the distance between pillars / gantry frames, and reduces the number of pillars required for suspension.

[0016] (2) The present invention specifically reduces the suspension clearance requirement based on the restricted clearance position.

[0017] (3) The present invention optimizes the plane layout of the rigid contact network and eliminates the lateral stress between different suspension points of the rigid contact network.

[0018] (4) The present invention optimizes the suspension of the anchor segment joints and facilitates the connection between different anchor segments.

[0019] (5) The present invention facilitates the adjustment of the pull-out value of the overhead contact network suspension installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a cable-type suspension structure and a beam-position suspension structure according to an embodiment of the present invention;

[0022] Figure 3 It is a structural schematic diagram of a pull rod type suspension structure according to an embodiment of the present invention;

[0023] Figure 4 It is a schematic structural diagram of the anchor segment joint according to an embodiment of the present invention.

[0024] In the figure: 1-busbar, 2-busbar clamp A, 3-suspension insulator, 4-adjustment plate, 5-hoop, 6-anchor, 7-lower anchor insulator, 8-pull cable, 9-busbar clamp B, 10-crossbeam, 11-middle anchor clamp, 12-pull rod, 13-insulating rod, 14-adjustment bolt, 15-steel beam. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] The embodiment of the present invention provides a large-span rigid overhead contact network suspension system for viaduct working conditions, such as Figure 1-4As shown, it includes a crossbeam 10, a cable-type suspension structure, a rod-type suspension structure, a crossbeam position suspension structure and a bus 1. The bridge pier is located between two adjacent crossbeams 10. The crossbeam position suspension structure is fixed below the crossbeam 10, and the cable-type suspension structure and the rod-type suspension structure are both located between two adjacent crossbeams 10. The rod-type suspension structure is connected to the crossbeam 10 located in the middle of the bus anchor section. The cable-type suspension structure is connected to the crossbeam 10. This embodiment utilizes the characteristics that the installation clearance required for the bus 1 at the position of the crossbeam 10 is high, and the installation clearance required for the bus 1 at the middle position of the two crossbeams 10 is low, to achieve the suspension of the contact network in the clearance-restricted section under the bridge pier or the upper collapsed bridge. A pillar for fixing and supporting the crossbeam 10 is set every three spans. On the basis of adding a small number of pillars, the suspension of the rigid contact network is achieved when the span of the viaduct working condition support structure is large. The bus 1 is suspended on the beam 10 through the cable suspension structure, the rod suspension structure, and the beam position suspension structure. The bus 1 is slidably connected to the cable suspension structure and the beam position suspension structure, and is fixedly connected to the rod suspension structure. The bus 1 is free to expand and contract longitudinally in the cable suspension structure and the beam position suspension structure, and the longitudinal force generated by the thermal expansion and contraction of the bus 1 can be eliminated. The bus 1 located at the maximum pull-out value of the bus adopts a pre-bent bus, and the rest of the bus 1 adopts a straight bus (ordinary bus) to eliminate the internal lateral force of the bus 1 formed by the positioning pull-out value. The anchor section joint is densely arranged with a support for fixing the beam 10, and a longitudinal steel beam 15 is arranged between the beams 10. The beam position suspension structure is fixed on the beam 10 or the steel beam 15. The steel beam 15 and the densely arranged beam 10 facilitate the adjustment of the spacing between the anchor section joint suspension points.

[0027] like Figure 2 As shown, the cable-type suspension structure includes a busbar clamp B9, a cable 8, a lower anchor insulator 7 and an anchor 6. The two anchors 6 are each fixed on one of the crossbeams 10, and the busbar clamp B9 is connected to the anchor 6 through the cable 8, and the two busbar clamps B9 are also connected through the cable 8. A lower anchor insulator 7 is provided on the cable 8 located between the busbar clamp B9 and the anchor 6. The direction of the cable 8 is consistent with the direction of the busbar 1, and the busbar clamp B9 is connected to the busbar 1, and the busbar 1 can be freely extended and retracted longitudinally in the busbar clamp B9. When the cable-type suspension structure has only one busbar clamp B9, each side of the busbar clamp B9 is connected to an anchor 6 through a cable 8.

[0028] The crossbeam position suspension structure shares the crossbeam 10 with the cable suspension structure and the rod suspension structure. The crossbeam position suspension structure includes a busbar 1 wire clamp A, a suspension insulator 3, an adjustment plate 4 and a clamp 5. The busbar 1 wire clamp A is connected to the suspension insulator 3, the suspension insulator 3 is connected to the adjustment plate 4, and the adjustment plate 4 is fixed to the crossbeam 10 through the clamp 5. The busbar 1 wire clamp A is connected to the busbar 1, and the busbar 1 can be freely extended and retracted longitudinally in the busbar 1 wire clamp A.

[0029] like Figure 3 As shown, the tie rod type suspension structure includes a middle anchor wire clamp 11, a tie rod 12, an insulating rod 13, an adjusting bolt 14 and an anchor 6, wherein the middle anchor wire clamp 11, the tie rod 12, the insulating rod 13, the adjusting bolt 14 and the anchor 6 are connected in sequence, and the anchor 6 is fixed on the cross beam 10. The middle anchor wire clamp 11 is connected to the bus 1. The tie rod type suspension structure is used for the suspension points on both sides of the cross beam 10 in the middle of the anchor section, replacing the original central anchor knot to prevent the bus 1 from moving.

[0030] When the same crossbeam 10 is connected to both the pull-rod suspension structure and the cable suspension structure, multiple anchors 6 can be provided to connect the adjusting bolts 14 and the cables 8 respectively; when the position is appropriate, only one anchor 6 can be provided to connect the adjusting bolts 14 and the cables 8 at the same time.

[0031] The crossbeam 10 can be in the form of a round steel tube or an H-shaped steel. The crossbeam 10 and the supporting structure can be in the form of a cantilever or a portal frame according to the needs, and the corresponding clamp 5 and anchor 6 can be adjusted according to the form of the crossbeam 10. The function of the crossbeam 10 is to anchor the suspension wire and the suspension point; and to control and adjust the pull-out value of the suspension point.

[0032] In this embodiment, a beam position suspension structure is used as a control point for the pull-out value at the maximum and minimum pull-out value positions of an anchor section and the anchor section joint position, and a cable-type suspension structure and a pull-rod-type suspension structure are used at intervals in other positions as auxiliary control points for the pull-out value. The cable-type suspension structure and the pull-rod-type suspension structure are only used for suspending the bus 1 and are not used as suspension points for controlling the pull-out value. This can achieve key control of the installation and adjustment of the pull-out value while taking into account convenience, and ultimately achieves the purpose of eliminating the lateral stress of the bus 1.

[0033] The present invention has been described in detail above through embodiments, but the contents described are only exemplary embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. The protection scope of the present invention is defined by the claims. Anyone who utilizes the technical solution described in the present invention, or a technician in the field, inspired by the technical solution of the present invention, designs a similar technical solution within the essence and protection scope of the present invention to achieve the above technical effects, or makes equal changes and improvements to the scope of application, etc., shall still fall within the scope of protection covered by the patent of the present invention.

Claims

1. A large-span rigid overhead contact network suspension system for viaduct conditions. Features: It includes a crossbeam, a cable-type suspension structure, a tie-rod suspension structure, a crossbeam position suspension structure and a bus. The pier is located between two adjacent crossbeams. The bus is suspended on the crossbeam through the cable-type suspension structure, the tie-rod suspension structure and the crossbeam position suspension structure. The crossbeam position suspension structure is located below the crossbeam. The cable-type suspension structure and the tie-rod suspension structure are both located between two adjacent crossbeams. The tie-rod suspension structure is connected to the crossbeam located in the middle of the bus anchor section. The bus located at the maximum pull-out value of the bus adopts a pre-bent bus.

2. A large-span rigid overhead contact network suspension system for viaduct working conditions as claimed in claim 1, Features: One crossbeam is arranged every three spans.

3. A large-span rigid overhead contact network suspension system for viaduct operation as claimed in claim 1, Features: The crossbeam position suspension structure includes a busbar clamp A, a suspension insulator, an adjustment plate and a clamp. The busbar clamp A is connected to the suspension insulator, the suspension insulator is connected to the adjustment plate, and the adjustment plate is fixed to the crossbeam through a clamp.

4. A large-span rigid overhead contact network suspension system for viaduct operation as claimed in claim 1, Features: The cable-type suspension structure includes a busbar clamp B, a cable, a lower anchor insulator and an anchor. The anchor is fixed on the crossbeam. The busbar clamp B is connected to the anchor through a cable. A lower anchor insulator is provided on the cable between the busbar clamp B and the anchor.

5. A large-span rigid overhead contact network suspension system for viaduct operation as claimed in claim 4, Features: When the number of the busbar clamps B between adjacent beams is two, one side of the busbar clamp B is connected to the anchor by a cable, and the other side is connected to the adjacent busbar clamp B by a cable; when the number of the busbar clamp B is one, both sides of the busbar clamp B are connected to the anchor by cables.

6. A large-span rigid overhead contact network suspension system for viaduct operation as claimed in claim 1, Features: The pull rod type suspension structure comprises a center anchor wire clamp, a pull rod, an insulating rod, an adjusting bolt and an anchor, wherein the center anchor wire clamp, the pull rod, the insulating rod, the adjusting bolt and the anchor are connected in sequence, and the anchor is fixed on the cross beam.

7. A large-span rigid overhead contact network suspension system for viaduct operation as claimed in claim 1, Features: The busbar is slidably connected to the cable-type suspension structure and the beam position suspension structure; the busbar is fixedly connected to the pull-rod-type suspension structure.

8. A large-span rigid overhead contact network suspension system for viaduct operation as claimed in claim 1, Features: Cross beams are densely arranged at the joints of the anchor sections, longitudinal steel beams are arranged between the cross beams, and the suspension structure at the cross beam position is fixed on the cross beams or the steel beams.

9. A large-span rigid overhead contact network suspension system for viaduct operation as claimed in claim 1, Features: The cross beam is made of round steel pipe or H-shaped steel.

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