A fixing fitting and a connecting fitting using the fixing fitting

Abstract

The invention discloses a fixing fitting and a connecting fitting using the fixing fitting. The support for fixing the hardware is inserted into the port of the pipe busbar, and the outer circumference of the support is fixed with an elastically retractable contact piece. The contact piece has an initial position and a It is used to tighten the expansion position on the inner wall surface of the pipe bus after the support is inserted into the pipe bus. When in use, the contact piece on the support is in the initial position before being inserted into the port of the pipe bus, and then pushed by external force , so as to insert the support into the pipe bus, and at the same time, through the action of external force or self-deformation, the contact piece on the periphery of the support is tightened on the inner wall of the pipe bus, so that the entire fixing hardware is inserted into the pipe bus through expansion and tightening assembly Therefore, the connecting fitting has the advantages of convenient assembly, simple structure and small space occupation.

Description

technical field [0001] The invention relates to a fixing hardware and a connecting hardware using the fixing hardware. Background technique [0002] At present, with the increasing domestic power demand, the capacity and debt flow of conventional converter stations can no longer meet the actual power demand, so that UHV DC transmission will gradually replace conventional power transmission methods and become my country's future long-distance large-capacity power transmission. As the mainstream of the project, the construction of UHV DC substations will also greatly increase, and the amount of busbar connection fittings in the valve hall of UHV DC substations will also increase. With the increase of capacity and carrying capacity, the voltage level requirements of the components in the valve hall of the substation will also increase, so that the pipe diameter of the busbar will increase accordingly. The fixing fittings are connected by clamps buckled on the outer circumference ...

AI Technical Summary

Problems solved by technology

[0002] At present, with the increasing domestic power demand, the capacity and debt flow of conventional converter stations can no longer meet the actual power demand, so that UHV DC transmission will gradually replace conventional power transmission methods and become my country's future long-distance large-capacity power transmission. As the mainstream of the project, the construction of UHV DC substations will also greatly increase, and the amount of busbar connection fittings in the valve hall of UHV DC substations will also increase. With the increase of capacity and carrying capacity, the voltage level requirements of the components in the valve hall of the substation will also increase, so that the pipe diameter of the busbar will increase accordingly. The fixing fittings are connected by clamps buckled on the outer circumference of the end of the pipe busbar. For example, Chinese patent document 201310683723.1 discloses a kind of 800KV converter station bushing and pipe busbar bridge overcurrent fittings. The connecting fittings The outer diameter will increase with the increase of the pipe diameter, so that the space size inside the entire valve hall will also need to increase, which will have a great impact on the construction and layout of the entire valve hall

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