Anti-tension triple-connected middle string clamp for 1,000kV ultrahigh-voltage power transmission line

Abstract

The invention discloses an anti-tension triple-connected string-in-string clamp for a 1,000kV ultrahigh-voltage power transmission line. The anti-tension triple-connected middle string clamp comprises a closed type before-clamping clamp, a closed type after-clamping clamp and a hydraulic screw rod, and also comprises a cross arm end part clamp and a wire end part clamp, wherein a fixing hole connected with a connection plate construction hole is formed in the center of the wire end part clamp; outwards extending arms are arranged on two sides of the wire end part clamp; connection holes connected with one end of the hydraulic screw rod are formed in the end parts of the extending arms; the extending arm on one side is hinged to the end part through a bolt and a nut; the cross arm end part clamp consists of two similar long-strip type connection plates; a connection hole hinged to the hydraulic screw rod is formed in one end of the cross arm end part clamp; a fixing hole hinged to a triple serial connected plate is formed in the other end of the cross arm end part clamp; the cross arm end part clamp, the wire end part clamp, the closed type before-clamping clamp and the closed type after-clamping clamp are made of a titanium alloy material. The anti-tension triple-connected middle string clamp for the 1,000kV ultrahigh-voltage power transmission line is simple in structure, high in intensity, light in weight, high in mechanical characteristic and convenient to mount and is suitable for the replacement of a middle string insulator of an ultrahigh-voltage triple-connected string.

Description

technical field [0001] The invention relates to a jig for replacing insulators in tension-resistant triple series and mid-series insulators of UHV AC transmission lines. Background technique [0002] As the 1000kV UHV transmission line is completed and put into operation, ensuring the safe operation of the line and improving the availability of equipment has become the top priority of line operation. In the operation of transmission lines, various situations that affect the health level of the line inevitably occur, and insulator damage is the most common line defect. Conventional ultra-high voltage transmission lines mostly use four-split conductors, and the tension strings are less stressed, and the tension strings are mostly double-connected, connected in parallel through a connecting board, and the fittings at both ends of the fittings string can be used as connection points in the design of fixtures Design jigs, easy to implement. [0003] The 1000kV UHV transmission ...

AI Technical Summary

Problems solved by technology

In order to ensure the corona characteristics of the line, the shielding voltage equalizing ring is usually designed at the end of the insulator. Since the three-connected series occupies a large space, the structure size of the shielding voltage equalizing ring is large, and the ring body is embedded in the insulator string. The fixture design of traditional EHV transmission lines is obviously different

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