Charged replacement method for whole string of insulators of ultra-high-voltage transmission line, and hardware fitting thereof

Abstract

The invention discloses a charged replacement method for the whole string of insulators of an ultra-high-voltage transmission line, wherein two to three connection plates and a hardware fitting for charged replacement are used; the hardware fitting for charged replacement comprises a hardware fitting body (3); a first connection plate (7) in the shape of an isosceles triangle or an isosceles trapezoid is connected to one side of the hardware fitting body; a second connection plate (14) is connected to the other side of the hardware fitting body; a groove used for embedding and fixing the bevelled edge of the first connection plate (7) is formed in a place used for connecting the first connection plate (7), of the hardware fitting body (3); a hook (1) used for dragging and fixing a conductive wire, and a two-walking or three-walking block are arranged on the hardware fitting body (3). During replacement for the whole string, after the conductive wire is tightened until the strain insulator string is loosened, the strain insulator string is loosened and then drops to the ground to be replaced. According to the charged replacement method disclosed by the invention, a separation weight during the charged replacement for the ultra-high-voltage strain insulator string can be reduced, and moreover, the hardware fitting is not liable to slide out, thus reducing the working difficulty and facilitating the easy charged replacement for the insulator string.

Description

Technical field [0001] The invention relates to the field of electric power maintenance, in particular, to a live-line replacement method of a whole string of insulators for UHV transmission lines and their fittings. When the UHV tensile insulator string is exchanged, the method can be matched with a two-going three-way pulley and a hoist, which can reduce the weight of the UHV tensile insulator string during live exchange, and the fittings are not easy to slip out, reducing work Difficulty, convenient for easy live exchange of insulator strings. Background technique [0002] In the past, ultra-high voltage transmission lines, such as 220kV transmission lines, generally used double-split conductors, and matched insulators also adopted double-string type. The live exchange of transmission lines and their string insulators is an important item in the live work project. It is necessary to tighten the insulator string to replace the insulators while meeting the safety distance. [00...

AI Technical Summary

Problems solved by technology

In addition, due to the limitations of existing production specifications, usage habits, and manufacturing cost requirements, the existing connecting plates or fixtures used in series for live exchange insulators and used as main connecting components are standardized isosceles triangles or isosceles trapezoids, with oblique As a result, the operation of the tension insulator string is unstable and easy to slip out, resulting in the inability to easily replace the UHV tension insulator string, and even lead to safety accidents in severe cases

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