Lattice type derrick of electric transmission line

Abstract

A lattice type derrick of an electric transmission line is formed by connecting a suspension base, a standard knot and a pulley in sequence. The two ends of the standard knot are provided with conical end joints. The standard knot and the end joints are formed by a plurality of joint bodies. Each joint body is made of carbon fiber reinforced resin matrix composite materials, and the adjacent joint bodies are connected through a flange. Each joint body of the standard knot comprises four vertical main pipes which are distributed in a rectangular mode and inclined pipes arranged between every two adjacent main pipes. Each end joint body comprises four main pipes which are distributed in a conical mode and inclined pipes between every two adjacent main pipes. Each flange comprises a rectangular base and inserting pipes arranged in the four corners of the rectangular base, and the main pipes of the standard knot and the main pipes of the end joints are inserted into the inserting pipes respectively to be bonded through glue. The derrick is made of the carbon fiber reinforced resin matrix composite materials and is high in strength and light in weight.

Description

technical field [0001] The invention relates to a holding pole of a power transmission line, in particular to a lattice type holding pole of a power transmission line. Background technique [0002] At present, there are mainly two types of poles used in the construction of iron towers for domestic transmission line construction: tubular type and lattice type. Under the same bearing capacity, lattice type poles are lighter in weight and more vertically stable than single column types. Well, the bending strength is high and the lateral deformation is small. [0003] The commonly used materials for holding poles are steel standard section and aluminum standard section. The density of steel is high, and the pole made of it is heavy, which is not conducive to assembly, disassembly and transportation. The density of aluminum material is relatively small, and the weight of the steel flange after the pole is connected increases, which is not convenient for manual installation and ...

AI Technical Summary

Problems solved by technology

[0005] (2) The temperature resistance period is not long: FRP generally cannot be used at high temperatures for a long time. For example, general-purpose polyester FRP is generally only used below 100°C; general-purpose epoxy FRP is above 60°C, but its strength has dropped significantly

[0006] (3) Easy aging: the performance is easy to decline under the action of ultraviolet rays, wind, sand, rain and snow, chemical media, mechanical stress, etc.

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