Lead supporting and fixing fitting and interval rod brackets thereof

Abstract

The invention discloses a lead supporting and fixing fitting and the interval rod brackets thereof. More than two basic bodies of the interval rod brackets are arranged along the horizontal linear direction at intervals, and fixing brackets are fixedly connected between the basic bodies. The wire clamping positions corresponding to the conductor clamps for clamping a same split conductor on the basic bodies are aligned along the arranging direction. In the process of erecting the split conductor, the split conductor is supported by two or more fulcrums clamp on a same lead supporting and fixing fitting, and the fulcrums are relatively fixed. The relative shaking amplitude of each lead supporting and fixing fitting is reduced under the effect of wind, thermal stress and manpower dragging factors, since the length of split conductor clamped by the lead supporting and fixing fitting increases. Bending of the incoming/exiting portions of the split conductor on the lead supporting and fixing fitting is minimized, and the stability and reliability of power transmission of the split conductor are improved.

Description

technical field [0001] The invention relates to a wire supporting and fixing hardware and a spacer bar bracket thereof. Background technique [0002] At present, with the use of ±800kV UHV DC converter station fittings in domestic DC converter stations in recent years, the requirements for the use of converter station fittings in the construction of UHVDC converter stations have also increased. Existing converter station fittings such as "a wire clip installation structure and a wire spacer using the installation structure" disclosed in Chinese patent document CN104143804A (published on November 12, 2014), including the spacer bracket and its upper More than three wire clamps evenly distributed around the circumference, the spacer rod bracket includes a base formed by connecting more than three U-shaped bent plates uniformly distributed around the circumference, each U-shaped bent plate has a bottom connecting plate and is arranged on The two side plates at both ends of the...

AI Technical Summary

Problems solved by technology

However, due to the large distance between the wire supporting and fixing hardware in the length direction of the split wire, each wire supporting and fixing hardware forms a fulcrum support and fixing for the split wire, that is, under the influence of wind force, thermal stress, human pulling and other factors Next, the adjacent wire supporting and fixing hardware on the split wire will move relative to each other, and the split wire between the adjacent wire supporting and fixing hardware will twist around the corresponding wire clamp as the fulcrum, so that the split wire fulcrum clamped by the wire clamp Parts are easily broken, causing reduced wire reliability and stability of the entire split wire

At the same time, due to the limitation of the distribution spacing of the wire supporting and fixing fittings on the split wire, the split wire will bend on both sides of the single wire supporting and fixing fittings, so that during use, it will change with the surrounding temperature, wind and other natural conditions and maintenance process. Influenced by the human factors of medium and high tension, the fatigue damage of the inner core conductor of the split wire will be aggravated, so that the aging speed of the split wire of the UHVDC converter station using the wire to support and fix the hardware is accelerated, and even split in the normal service life. The wire is broken at the wire clamp of the wire supporting and fixing hardware, which leads to a decrease in the stability and reliability of the entire DC converter station

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