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

Abstract

A single-circuit transmission line breaking angle steel tower. It includes the tower body, the top ground wire cross arm, the upper layer wire cross arm, the middle layer wire cross arm, and the lower layer wire cross arm. The tip of the broken side cross arm is arranged parallel to the direction of the target breaking line; the upper conductor cross arm is arranged from the tower body parallel to the direction of the target breaking line; the middle conductor cross arm is T-shaped. Two cross-arms are arranged parallel to the target breaking line of the tower body, and one side cross-arm is arranged perpendicular to the target breaking line from the back of the tower body to the breaking side. The present invention only uses one base tower to realize the problem of single-circuit disconnection, reducing the number of new towers; after disconnection, a double circuit is formed to continue routing, avoiding the use of double-circuit branch towers, and does not change the wire layout of adjacent towers, reducing Possibility of revamping adjacent towers.

Description

A single-circuit transmission line breaking angle steel tower

Technical field:

The invention relates to the technical field of high-voltage transmission lines, in particular to a single-circuit transmission line breaking angle steel tower.

Background technique:

In high-voltage transmission lines, it is one of the common system schemes to connect single-circuit breaking lines to form double-circuit lines connected to new substations. The existing single-circuit breaking schemes are mainly divided into the following two types.

1) A base double-circuit strain tower is newly built under the disconnected line, and the cross-arm of the strain tower is arranged parallel to the direction of the disconnected line. The single-circuit lines erected with angle steel towers are usually arranged in a triangular The wires on both sides of the return line are usually arranged vertically, which may easily cause the suspension string of adjacent straight tower wires to deviate from the vertical state, and may fail to meet the electrical clearance requirements of the original single-circuit tower.

2) Two-base single-circuit strain towers are newly built under the disconnected line, and after the line is disconnected, they are connected to double-circuit strain towers to continue routing. The number of newly-built single-circuit strain towers is large, occupying a large area and wide corridors , Project investment and implementation are more difficult.

Invention content:

The purpose of the present invention is to provide a single-circuit transmission line breaking angle steel tower. Only one base tower is used to realize the problem of single-circuit breaking, reducing the number of new towers; The use of towers does not change the conductor layout of adjacent towers, reducing the possibility of transformation of adjacent towers.

In order to solve the problems existing in the background technology, the present invention adopts the following technical scheme: it includes a tower body, a ground wire cross arm on the top floor, an upper layer wire cross arm, a middle layer wire cross arm, and a lower layer wire cross arm, and the top of the tower body is provided with a top layer The ground wire cross arm, the upper layer wire cross arm is arranged under the top layer ground wire cross arm, the middle layer wire cross arm is arranged under the upper layer wire cross arm, and the lower layer wire cross arm is arranged under the middle layer wire cross arm;

The top-floor ground wire crossarms are arranged from the tower body perpendicular to the target breaking line direction, and the two side crossarms are arranged from the breaking side cross arm tip parallel to the target breaking line direction;

The upper-layer conductor cross-arms are arranged on both sides of the tower parallel to the direction of the target breaking line;

The cross-arms of the middle layer conductors are T-shaped, with two cross-arms arranged parallel to the target breaking line from the tower body, and one side cross-arm being arranged perpendicular to the target breaking line from the back of the tower body to the breaking side;

The lower conductor cross-arm is arranged from the tower body perpendicular to the direction of the target breaking line to the breaking side, and from the tip of the cross-arm on the breaking side, two cross-arms are arranged parallel to the direction of the target breaking line.

Compared with prior art solutions, the present invention has the following advantages:

1) The wire layout of the target breaking line is not changed, which reduces the possibility that the adjacent towers of the target breaking line are difficult to meet the electrical clearance requirements;

2) Double-circuit double-sided breaking can be completed by using only one basic invention tower, and the number of new towers is small, saving investment;

3) Breaking to form a double-circuit line continues to run. The original double-circuit branch tower can be replaced by a straight pole (or a small-angle corner pole) according to the actual situation on site, which reduces the use conditions of the pole tower and reduces the line corridor.

Description of drawings:

Fig. 1 is a structural representation of the present invention;

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

Fig. 3 is a structural schematic diagram of the cross arm of the ground wire on the top floor;

Fig. 4 is a schematic structural view of the upper conductor cross-arm;

Fig. 5 is a structural schematic diagram of the middle-level conductor cross-arm;

Fig. 6 is a structural schematic diagram of the lower conductor cross-arm;

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

Detailed ways:

Referring to Figures 1-2, the present invention includes a tower body 1, a top-level ground wire cross arm 2, an upper-level wire cross-arm 3, a middle-level wire cross-arm 4, and a lower-level wire cross-arm 5. The top of the tower body 1 is provided with a top-level ground wire Cross arm 2, the upper layer wire cross arm 3 is arranged below the top floor ground wire cross arm 2, the middle layer wire cross arm 4 is arranged below the upper layer wire cross arm 3, and the lower layer wire cross arm 5 is arranged below the middle layer wire cross arm 4.

Referring to FIG. 3 , the top floor ground wire crossarm 2 is arranged on both sides from the tower body 1 perpendicular to the direction of the target breaking line, and from the tip of the breaking side cross arm is arranged parallel to the direction of the target breaking line.

Referring to FIG. 4 , the upper conductor crossarms 3 are arranged on both sides from the tower body 1 parallel to the direction of the target breaking line.

Referring to Fig. 5 , the middle conductor cross arm 4 is T-shaped, two cross arms are arranged parallel to the target breaking line from the tower body 1, and one side cross arm is arranged perpendicular to the target breaking line from the back of the tower body 1 to the breaking side.

Referring to Fig. 6 , the lower conductor crossarm 5 is arranged on one side from the tower body 1 perpendicular to the direction of the target breaking line, facing the breaking side, and from the tip of the crossarm on the breaking side parallel to the direction of the target breaking line.

With reference to Fig. 7, build a new basic invention pole tower below the line, hang the target breaking line wire on the upper layer wire cross arm and form the line wire after breaking, hang the target opening on the cross arm perpendicular to the target line direction in the middle layer wire cross arm Broken line wire, hang on the cross arm parallel to the breaking direction of the target line to form a line wire after breaking, hang the target breaking line wire on the cross arm parallel to the breaking direction of the target line on the lower layer wire and form a line wire after breaking, the top layer In the ground wire cross arm, the cross arm perpendicular to the target line back to the breaking side and the cross arm tip parallel to the target line hang the target breaking line ground wire and form the line ground wire after breaking.

The length of the cross arm parallel to the direction of the target breaking line is determined by the layout of the wires forming the line after breaking, and the length of the cross arm perpendicular to the direction of the target breaking line is determined by the wire layout of the original line.

The length and spacing of the top-layer ground wire cross-arm, upper-layer wire cross-arm, middle-layer wire cross-arm, and lower-layer wire cross-arm need to consider the electrical distance between wires and ground wires, the electrical distance between the wire and the tower body, and the adjacent wires on the upper and lower layers. The minimum horizontal offset distance between.

Claims (1)

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;

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.