A live replacement method and hardware for a whole string of insulators in UHV transmission lines

Abstract

A live replacement method for an entire string of insulators on an UHV transmission line, using two-three connecting plates and a live replacement fitting, the live replacement fitting includes a fitting body (3), and the connection shape of one side of the fitting body is an isosceles triangle or The first connecting plate (7) of isosceles trapezoidal shape, the other side is connected to the second connecting plate (14), and the fitting body (3) is used to connect the first connecting plate (7) to form a A groove on the hypotenuse of a connecting plate (7), the metal tool body (3) is provided with a hook (1) for pulling and fixing the wire and a two-way three-way block. When replacing the entire string, the wires are tightened until the tension insulator string is loosened, and then the tension insulator string is loosened and hangs down to the ground for replacement. According to the invention, the detachment weight of the UHV tension insulator string can be reduced, and the hardware is not easy to slip out, which reduces the difficulty of work and facilitates easy live swapping of the insulator string.

Description

technical field [0001] The invention relates to the field of electric power maintenance, in particular to a method for live replacement of a whole string of insulators for UHV transmission lines and fittings thereof. The method can be used in conjunction with two-way and three-way trolleys and hoists when exchanging UHV tension insulator strings, which can reduce the detachment weight of UHV tension insulator strings when they are electrified, and the fittings are not easy to slip out, reducing work Difficulty, it is convenient to easily replace the insulator string with electricity. Background technique [0002] In the past, extra-high voltage transmission lines, such as 220kV transmission lines, generally used double-split conductors, and the matching insulators also used double-string types. Its live exchange transmission line and its string insulators are important items in live work projects, and it is necessary to tighten the insulator strings to replace insulators wh...

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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