Expansion joint suitable for low-clearance lightweight busbar

Abstract

The invention relates to an expansion joint suitable for a low-clearance lightweight busbar. The expansion joint comprises a first expansion joint and a second expansion joint which are arranged in parallel, wherein one end of the first flow taking device is fixedly connected with the first expansion joint, and a lower pressing plate is fixedly arranged at the bottom of the other end; one end of the second flow taking device is fixedly connected with the second expansion joint, and a lower pressing plate is fixedly arranged at the bottom of the other end; the lower pressing plate is provided with a horizontal section which is horizontally arranged, a groove is formed in the horizontal section, and a pressing block with the top abutting against the bottom of the second expansion joint or the first expansion joint is installed in the groove; the pressing block is matched with the bottom of the flow taking device to clamp the second expansion joint or the first expansion joint, and the first flow taking device is in sliding connection with the second expansion joint or the second flow taking device is in sliding connection with the first expansion joint; the first expansion joint can slide relative to the second expansion joint, stable operation of the locomotive is guaranteed, and safety and reliability of operation of the locomotive are improved.

Description

technical field [0001] The invention relates to an expansion joint, in particular to an expansion joint suitable for low headroom and lightweight busbars. Background technique [0002] Urban rail transit is restricted by topography, urban planning and other conditions. The urban area is mostly underground. The catenary in the underground tunnel mainly adopts rigid suspension, and its structural height is limited by the clearance of the tunnel; in actual engineering, the rigid catenary suspension system The components and parts must not only meet the clearance requirements of the tunnel, but also ensure safe and reliable power supply; therefore, the development of busbar expansion joints suitable for low-clearance tunnel environments is the future development trend of rigid catenary. [0003] The ideal operating state of the rigid suspension power supply system is that the contact between the pantograph and catenary is reliable, which provides guarantee for the electric locom...

AI Technical Summary

Problems solved by technology

[0004] The rigid catenary suspension structure is relatively rigid, and the pantograph will be impacted when it passes through the rigid anchor point at high speed, especially at the joint of the anchor section, which is not conducive to good pantograph-catenary dynamic flow; the rigidity of the anchor point causes rigidity The serious and uneven wear of catenary contact wires is more prominent, which affects the normal contact and flow between the pantograph and catenary, thereby affecting the operation safety; the expansion joint of the busbar is connected in series between the busbars of the two anchor sections. increase, the contact force of the pantograph changes suddenly, thus forming a hard point between the pantograph and catenary, and the hard point causes the pantograph and catenary to go offline and the high-temperature arc generated at the moment of offline, which brings great harm to the catenary and pantograph

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