A UHV DC bushing joint

Abstract

The invention provides an ultrahigh-voltage direct-current sleeve joint. The ultrahigh-voltage direct-current sleeve joint comprises a conducting pipe as well as an epoxy pipe and a supporting cover plate which are arranged coaxially relative to the conducting pipe, wherein the supporting cover plate is provided with a through hole which is vertical to the axial direction of the supporting cover plate and coaxial with the conducting pipe and the epoxy pipe; the conducting pipe passes through the through hole and is connected with a top cover plate; a part, surrounded between the supporting cover plate and the top cover plate, of the conducting pipe is provided with a corrugated pipe which is positioned at the upper end of the supporting cover plate and connected with the supporting cover plate and the top cover plate. Compared with the prior art, the ultrahigh-voltage direct-current sleeve joint disclosed by the invention has the advantages of solving the problem of extension and contraction of the conducting pipe by enabling the corrugated pipe to extend and contract correspondingly along with the extension and contraction of the conducting pipe, solving the problem of metal friction caused by hard connection between parts, improving the sealing reliability, guaranteeing good leakproofness of a sleeve chamber body, improving the problem of easy loosening caused by own gravity of the parts, simplifying the installation process of the conducing pipe and lowering the time cost.

Description

technical field [0001] The invention relates to a DC bushing joint, in particular to an UHV DC bushing joint. Background technique [0002] According to literature reports, since the high-voltage direct current transmission was put into operation in the 1950s, after more than 50 years of development, the high-voltage and ultra-high voltage direct current transmission technology has been gradually improved. In the 1970s and 1980s, the former Soviet Union carried out UHV direct current transmission engineering practice , its main equipment has passed the factory test and has built more than 1,000 kilometers of transmission lines. The research and development of UHV DC transmission technology in the international industry and academia has not been interrupted, especially the construction and operation of AC UHV projects in the former Soviet Union and Japan; relying on the accumulation of years of operating experience, the design and manufacturing technology of key equipment It...

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention provides a DC bushing joint, which avoids the problems of increased friction and poor contact between the joint and the metal of the conductive tube, thereby effectively solving the problem of stretching and contracting of the super-long conductive tube, and solving the problem of The problem of electric field distortion inside the sleeve caused by the expansion and contraction of the tube improves the reliability of the seal at the same time, thereby ensuring a good seal of the sleeve cavity

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