Three-variable-two connection fittings and insulator strings using the connection fittings

Abstract

The invention relates to an extra-high voltage overhead power transmission line insulator chain type structure, and particularly relates to a three-to-two connection fitting and an insulator chain using the connection fitting. The three-to-two connection fitting comprises an upper plate and a lower plate which are vertically hinged. The upper plate is provided with connection holes which are arranged in a spacing way in a left-and-right direction and used for being connected with triple insulators respectively. The lower plate is provided with installing holes which are arranged at the left and right sides of the hinged part respectively and used for installing suspension clamps in a hinged way. The three force bearing points of the upper plate are converted into two force bearing points of the two sides of the lower part so that the structure is simple, center height is reduced and onsite installation is facilitated. Force bearing balance of the left and right sides can be automatically adjusted by the suspension clamps installed on the lower plate so that installation of conductive wires is facilitated, imbalance caused by tower position height difference and conductive wire ice coating can also be automatically adjusted and thus the strain type is ensured to be steady and safe.

Description

technical field [0001] The invention relates to an insulator string structure of an extra-high voltage overhead transmission line, in particular to a three-variable-two connecting fitting and an insulator string using the connecting fitting. Background technique [0002] UHV transmission lines are developing rapidly, and the application of large cross-section conductors requires matching connecting fittings. At present, the suspension clamps are directly installed on the large connecting plates connecting the insulator strings through transition pieces. There will be a large pendulum, and the suspension clamps on the large joint plate cannot be automatically adjusted, which increases the difficulty of installation and construction. [0003] The authorized announcement number is CN202258577U, and the Chinese patent document with the announcement date of May 30, 2012 discloses a three-variable and two-combination connecting plate, and the three-variable and two-combining conne...

AI Technical Summary

Problems solved by technology

[0002] UHV transmission lines are developing rapidly, and the application of large cross-section conductors requires matching connecting fittings. At present, the suspension clamps are directly installed on the large connecting plates connecting the insulator strings through transition pieces. There will be a large pendulum, and the suspension clamp on the large joint plate cannot be adjusted automatically, which increases the difficulty of installation and construction

[0003] The authorized announcement number is CN202258577U, and the Chinese patent document with the announcement date being May 30, 2012 discloses a three-variable and two-combination connecting plate. The suspension clamp is installed on the suspension connecting plate, which has a complicated structure and takes up a large volume; in addition, the three-variable and two-combined connecting plate uses a double-plate structure formed by two weldings, which increases the cost

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