CN105155914A

CN105155914A - Cut-off angle steel tower for single-loop power transmission line

Info

Publication number: CN105155914A
Application number: CN201510562136.6A
Authority: CN
Inventors: 朱晓鹏; 董江戎; 王力; 罗正帮; 张天忠; 程斌; 王东; 赵晖; 陈彦焰; 李昆梅; 刘琨; 杨雪锋; 郑少将
Original assignee: State Grid Anhui Electric Power Co Ltd; Anhui Huadian Engineering Consulting and Design Co Ltd; Hefei Power Supply Co of State Grid Anhui Electric Power Co Ltd
Current assignee: State Grid Anhui Electric Power Co Ltd; Anhui Huadian Engineering Consulting and Design Co Ltd; Hefei Power Supply Co of State Grid Anhui Electric Power Co Ltd
Priority date: 2015-09-07
Filing date: 2015-09-07
Publication date: 2015-12-16

Abstract

The invention discloses a cut-off angle steel tower for a single-loop power transmission line. The cut-off angle steel tower comprises a tower body, a top-layer ground wire cross arm, an upper-layer guide wire cross arm, a middle-layer guide wire cross arm and a lower-layer guide wire cross arm, wherein the top-layer ground wire cross arm is provided with a two-sided cross arm perpendicular to a target cut-off line direction from the tower body, and provided with a two-sided cross arm parallel to the target cut-off line direction from a tip part of an cut-off side cross arm; the upper-layer guide wire cross arm is provided with a two-sided cross arm parallel to the target cut-off line direction from the tower body; the middle-layer guide wire cross arm is T-shaped, is provided with a two-sided cross arm parallel to the target cut-off line from the tower body, and provided with a one-sided cross arm back on to a cut-off side and perpendicular to the target cut-off line from the tower body. The cut-off angle steel tower adopts a base pole tower to realize single-loop cut-off and reduce quantity of newly-built tower rods; and after the line is cut off, double loops are formed to continuously arrange the line, thereby avoiding use of a double-loop branch tower, not changing a guide wire arrangement mode of adjacent pole towers and reducing modifying possibility of adjacent towers.

Description

A kind of single back transmission line cut-offs angle steel tower

technical field:

The present invention relates to ultra-high-tension power transmission line technical field, particularly relate to a kind of single back transmission line and cut-off angle steel tower.

background technology:

In ultra-high-tension power transmission line, cut-off by single loop and form double-circuit line to access newly-built transformer station be one of ubiquitous system scheme, existing single loop cut-offs scheme and mainly divides following two kinds.

1) a newly-built base double loop anchor support below circuit is being cut-off, the parallel line direction that cut-off of anchor support cross-arm is arranged, adopt the single back line arrangement in triangular form usually of angle steel tower erection, adopt the double-circuit line both sides wire of angle steel tower erection usually in vertical arrangement, easily cause adjacent straight transmission tower wire suspension string to depart from vertical state, there is the possibility that can not meet the requirement of former single loop shaft tower electric clearance.

2) cut-off newly-built two base single loop anchor supports below circuit, will access double loop anchor support after line disconnection and continue cabling, newly-built single loop anchor support quantity is more, and take up an area comparatively large, corridor is wider, construction investment and to implement difficulty larger.

summary of the invention:

The object of this invention is to provide a kind of single back transmission line and cut-off angle steel tower, the problem only adopting a base shaft tower to achieve single loop to cut-off, decreases newly-built shaft tower quantity; Cut-off rear formation double loop and continue cabling, avoid the use of double loop branch tower, do not change the wire arrangements mode of adjacent shaft tower, reduce the possibility of adjacent tower transformation.

In order to solve Problems existing in background technology, the present invention is by the following technical solutions: it comprises tower body, top layer ground wire cross-arm, topping wire cross-arm, middle layer conductor cross-arm, lower layer conductor cross-arm, described tower body top is provided with top layer ground wire cross-arm, topping wire cross-arm is provided with below top layer ground wire cross-arm, be provided with middle layer conductor cross-arm below topping wire cross-arm, below middle layer conductor cross-arm, be provided with lower layer conductor cross-arm;

Described top layer ground wire cross-arm cut-offs line direction from tower body perpendicular to target and arranges both sides cross-arm, certainly cut-offs side cross-arm taper parallel object and cut-offs line direction layout both sides cross-arm;

Described topping wire cross-arm is parallel to target from tower body and cut-offs line direction layout both sides cross-arm;

Described middle layer conductor cross-arm is T font, cut-offs line arrangement both sides cross-arm from tower body parallel object, cut-offs side vertical target dorsad cut-off line arrangement cross-arm from tower body;

Described lower layer conductor cross-arm cut-offs line direction from tower body perpendicular to target and arranges cross-arm on one side towards cut-offfing side, certainly cut-offs side cross-arm taper parallel object and cut-offs line direction layout both sides cross-arm.

The present invention has the following advantages compared to prior art:

1) do not change target to cut-off line conductor and arrange, reduce target and cut-off the possibility that the adjacent shaft tower of circuit is difficult to meet electric clearance requirement;

2) only utilize a basic invention shaft tower can complete double loop bilateral to cut-off, newly-built shaft tower negligible amounts, investment reduction;

3) cut-off formation double-circuit line and continue cabling, former double loop branch tower can adopt straight line pole (or low-angle angle pole) to replace according to on-site actual situations, reduces shaft tower service condition, reduces line corridor.

accompanying drawing illustrates:

Fig. 1 is structural representation of the present invention;

Fig. 2 is the right view of Fig. 1;

Fig. 3 is the structural representation of top layer ground wire cross-arm;

Fig. 4 is the structural representation of topping wire cross-arm;

Fig. 5 is the structural representation of middle layer conductor cross-arm;

Fig. 6 is the structural representation of lower layer conductor cross-arm;

Fig. 7 is wiring schematic diagram of the present invention.

detailed description of the invention:

With reference to Fig. 1-2, the present invention it comprise tower body 1, top layer ground wire cross-arm 2, topping wire cross-arm 3, middle layer conductor cross-arm 4, lower layer conductor cross-arm 5, described tower body 1 top is provided with top layer ground wire cross-arm 2, topping wire cross-arm 3 is provided with below top layer ground wire cross-arm 2, be provided with middle layer conductor cross-arm 4 below topping wire cross-arm 3, below middle layer conductor cross-arm 4, be provided with lower layer conductor cross-arm 5.

With reference to Fig. 3, described top layer ground wire cross-arm 2 cut-offs line direction from tower body 1 perpendicular to target and arranges both sides cross-arm, certainly cut-offs side cross-arm taper parallel object and cut-offs line direction layout both sides cross-arm.

With reference to Fig. 4, described topping wire cross-arm 3 is parallel to target from tower body 1 and cut-offs line direction layout both sides cross-arm.

With reference to Fig. 5, described middle layer conductor cross-arm 4, in T font, cut-offs line arrangement both sides cross-arm from tower body 1 parallel object, cut-offs side vertical target dorsad cut-off line arrangement cross-arm from tower body 1.

With reference to Fig. 6, described lower layer conductor cross-arm 5 cut-offs line direction from tower body 1 perpendicular to target and arranges cross-arm towards cut-offfing side, certainly cut-offs side cross-arm taper parallel object and cut-offs line direction layout both sides cross-arm.

With reference to Fig. 7, newly-built one basic invention shaft tower below circuit, topping wire cross-arm hangs after target is cut-off line conductor and cut-off and form line conductor, cross-arm perpendicular to target line direction in middle layer conductor cross-arm hangs target and cut-offs line conductor, the cross-arm in parallel object line disconnection direction hangs and cut-offs rear formation line conductor, the cross-arm in lower layer conductor cross-arm parallel object line disconnection direction hangs after target is cut-off line conductor and cut-off and form line conductor, the cross-arm taper cut-offfing the cross-arm of side and parallel object circuit dorsad perpendicular to target line in top layer ground wire cross-arm hangs target and cut-offs line grounding wire and cut-off rear formation line grounding wire.

Describedly be parallel to the cross-arm length that target cut-offs line direction and determine by cut-offfing the rear wire arrangements mode forming circuit, the cross-arm length of cut-offfing line direction perpendicular to target is determined by the wire arrangements mode of former circuit.

Described top layer ground wire cross-arm, topping wire cross-arm, middle layer conductor cross-arm, lower layer conductor cross-arm length and spacing need to be considered between wire and minimum level offset distance between lead wire and earth wire between the electrical distance of electrical distance, wire and tower body, levels adjacent wires.

Claims

1. a single back transmission line cut-offs angle steel tower, it is characterized in that, it comprises tower body, top layer ground wire cross-arm, topping wire cross-arm, middle layer conductor cross-arm, lower layer conductor cross-arm, described tower body top is provided with top layer ground wire cross-arm, topping wire cross-arm is provided with below top layer ground wire cross-arm, be provided with middle layer conductor cross-arm below topping wire cross-arm, below middle layer conductor cross-arm, be provided with lower layer conductor cross-arm;