Bus-bar middle joint for rigid suspension catenary

Abstract

The invention relates to the technical field of a high-speed electric railway catenary, in particular to a bus-bar middle joint for a rigid suspension catenary, and solves the problem that looseness can be easily generated among the existing catenary bus-bars under the frequent impact condition. The bus-bar middle joint has the scheme that the middle joint is provided with a pair of threaded clamp plates and screw bolts, the clamp plates are respectively arranged in clamp walls at two sides of the bus-bars and are internally connected with two bus-bars, the screw bolts pass through holes formed in the bus-bars and are used for fixing the two ends of the threaded clamp plates with the two bus-bars, an installing hole formed in each threaded clamp plate is provided with a contractive unthreaded hole section positioned at the opening part and a threaded section positioned at the bottom, the middle joint is also provided with an annular steel threaded sleeve provided with screw threads at inside and outside, the external screw threads of the threaded sleeve are suitable for the threaded section of the corresponding threaded clamp plate to be screwed in, the internal screw threads of the threaded sleeve are suitable for the screw bolts to be screwed in, the inner diameter of the contractive unthreaded hole section arranged on the each threaded clamp plate is greater than that the screw diameter of each screw bolt, and the middle joint is also provided with flat pads which sheath the screw bolts and are positioned outside the bus-bar holes.

Description

technical field [0001] The invention relates to the technical field of high-speed electrified railway catenary, in particular to a bus bar intermediate joint for rigid suspension catenary. Background technique [0002] In recent years, with the rapid development of social economy, higher requirements have been put forward for railway transportation. In order to adapt to the continuous speed increase of railways under the new situation, higher requirements have been put forward for the technical requirements of catenary components. [0003] With the increase of the operation time and the higher and higher traffic density, the contact pressure and impact pressure of the pantograph will superimpose energy during the reciprocating driving process, which will affect the rigid suspension without lifting amount, which needs to be digested by the entire catenary system . [0004] The segmented bus bar holds the contact line, and the cross-sectional shape of the bus bar is as attach...

AI Technical Summary

Problems solved by technology

[0004] The segmented bus bar holds the contact line, and the cross-sectional shape of the bus bar is as attached figure 1 , has clamping walls on both sides, and the lower part has a clamp for clamping the contact wire. The intermediate joint connecting the segmented busbar is the most prone to laxity in the whole system. The main body of the intermediate joint is a pair of connecting two busbars. The threaded splint, two threaded splints are located in the clamping walls on both sides to connect the two busbars through bolts, and the bolts pass through the holes on the clamping wall and are screwed into the threaded through holes of the threaded splint. Since the bolts are steel parts, and The threaded splint is a conductive aluminum part, the hardness of the two is different, and the thermal expansion and contraction are different. During the process of digesting the influence of the pantograph at the busbar connection, the thread connection form of the intermediate joint will slip, resulting in the entire suspension system being zero. Components are loose, which poses a great threat to the safety of the traction power supply system

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