Electric replacing fitting for strain insulator string for transmission line above 500KV

Abstract

The invention provides an electric replacing fitting for a strain insulator string for a transmission line above 500KV. The electric replacing fitting comprises a fitting body (3); a first connecting plate (7) which is in a shape of an isosceles triangle or an isosceles trapezoid is connected to one side off the fitting body; a plurality of tons of insulator strings are connected to the side of a cross ram of the first connecting plate (7), and a second connecting plate (14) is connected to the other side of the fitting body; tensile force applied to the second connecting plate (14) is transmitted to the first connecting plate (7); the second connecting plate (14) is used for uniformly connecting a plurality of divided conductors in parallel; a concave groove, which is embedded and fixed to an inclined side of the first connecting plate (7), is formed in a part in which the first connecting plate (7) is connected to the fitting body (3), wherein the concave groove is closely matched with the inclined side of the first connecting plate by shape; a hook (1) for pulling and fixing a conductor, and a two-wire and three-wire pulley are arranged on the fitting body (3). With the adoption of the electric replacing fitting, the separating weight of the strain insulator string above 500KV under electric exchanging can be reduced; in addition, the fitting uneasily slips out, and therefore, the difficulty at work can be reduced, and the insulator string can be conveniently and easily electrically exchanged.

Description

technical field [0001] The invention relates to an electric power maintenance tool, in particular to a metal tool for live replacement of tension insulator strings for power transmission lines above 500KV. When the above 500KV tension insulator strings are replaced, the fittings can be used in conjunction with the two-way three-way block and the winch, which can reduce the detachment weight when the 500KV above tension insulator strings are replaced live, and the fittings are not easy to slip out, reducing the work load. 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...

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 strings is unstable and easy to slip out, resulting in the inability to easily replace the tension insulator strings above 500KV, and even lead to safety accidents in severe cases

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