CN105155910A - Single-loop cut-off steel tube pole tower adopting V-shaped combined string - Google Patents

Abstract

The utility model relates to a steel pipe pole tower with a single circuit breaker using a V-shaped combination string. It includes the tower body, the top-level ground wire cross-arm, the upper-level wire cross-arm, the middle-level wire cross-arm, and the lower-layer wire cross-arm. Cross arm, one triangular cross arm is arranged facing the breaking side, the three sides of the triangular cross arm are arranged in an isosceles triangle, the top angle of the triangular cross arm is fixed from the tower body, the bottom edge of the triangular cross arm is parallel to the target opening The direction of the breaking line; the upper conductor crossarm is arranged on both sides of the tower parallel to the target breaking line, and one side of the crossarm is arranged perpendicular to the target breaking line facing the breaking side; the middle conductor crossarm is parallel to the target breaking line of the tower The line is arranged with cross arms on both sides, and the target breaking line perpendicular to the tower body is arranged on both sides; the lower conductor cross arm is arranged on both sides from the tower body parallel to the target breaking line. The present invention only uses one base pole tower to realize the problem of single-circuit disconnection, reduces the number of newly-built pole towers, and forms double-circuits arranged in different phase sequences after disconnection to continue routing, reduces the electric field intensity of the conductor space, and avoids the use of double-circuit branch poles. Changing the wire layout of adjacent towers reduces the possibility of transformation of adjacent towers.

Description

A single-circuit breaking steel pipe tower using V-shaped combination strings

Technical field:

The invention relates to the technical field of high-voltage transmission lines, in particular to a steel pipe pole tower with single-circuit breakage using a V-shaped combination string.

Background technique:

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

1) A base double-circuit tension bar is newly built under the disconnected line, and the cross-arm of the tension bar is arranged parallel to the direction of the interrupted line. The conductors on both sides of the erected double-circuit line are usually arranged vertically, which may easily cause the suspension string of adjacent straight tower conductors to deviate from the vertical state, and there is a possibility that the electrical clearance requirements of the original single-circuit tower cannot be met.

2) Newly build two base single-circuit tension poles under the disconnected line, and connect the double-circuit tension poles to continue routing after the line is disconnected. The number of new single-circuit tension pole towers is large, occupying a large area, and the corridor is wide , Project investment and implementation are more difficult.

In order to reduce the influence of the electromagnetic environment around the transmission line in the above two schemes, it is necessary to arrange the phase sequences of the conductors on both sides of the double-circuit line in different phase sequences to reduce the space electric field intensity of the conductors.

Invention content:

The purpose of the present invention is to provide a single-circuit breaking steel pipe tower using a V-shaped combination string. Only one base tower is used to realize the problem of single-circuit breaking, reduce the number of new towers, and form different phase sequences after breaking. The loop continues to run, reducing the electric field strength of the conductor space, avoiding the use of double-circuit branch poles, and not changing the conductor layout of adjacent towers, reducing the possibility of adjacent tower transformation.

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 ground wire crossarm on the top floor is arranged from the back of the tower body to the breaking side, and one side is perpendicular to the target breaking line, and a triangular crossarm is arranged facing the breaking side. The three sides of the triangular crossarm are equal Arranged in a waist triangle, the top angle of the triangular cross arm is fixed from the tower body, and the bottom edge of the triangular cross arm is parallel to the direction of the target breaking line;

The upper-layer conductor cross-arms are arranged on both sides of the tower body parallel to the target breaking line, and one side of the cross-arm is arranged vertically to the breaking side of the target breaking line;

The middle-level conductor crossarms are arranged on both sides of the parallel target breaking line from the tower body, and are arranged on both sides of the vertical target breaking line from the tower body;

The cross-arms of the lower layer conductors are arranged on both sides of the cross-arms parallel to the target breaking line of the tower body;

A V-shaped combined insulator string is arranged on the cross-arm perpendicular to the direction of the target breaking line among the upper-layer wire cross-arm and the middle-layer wire cross-arm, and the V-shaped combined insulator string consists of two tension strings arranged horizontally along the line direction. For docking, connect the V-shaped connecting fittings in the direction of the vertical line at the joint of the two tension strings, and then connect the V-shaped connecting fittings to the cross-arm.

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) Only one basic patented tower can be used to complete single-circuit breaking, and the number of new towers is small, saving investment;

3) Disconnect to form a double-circuit line and continue to run. The original four-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;

4) The triangular cross-arm is beneficial to offset the force on the cross-arm of the target breaking line and the formed line after breaking, and the overall structure is more stable.

5) The insulator string on the side of the target breaking line adopts the design of "V-shaped" combined insulator string. The width of the tower head can be compressed without changing the suspension characteristics of the line in the direction of the target breaking line.

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;

Figure 7 is a schematic diagram of the wiring of the present invention;

Fig. 8 is a schematic structural diagram of a V-shaped combined insulator string;

Fig. 9 is a left view of the V-shaped connecting hardware in Fig. 8 .

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 cross arm 2 is arranged from the back of the tower body 1 to the breaking side with a cross arm perpendicular to the target breaking line, and a triangular cross arm is arranged facing the breaking side, and the triangular cross arm The three-sided cross-arms are arranged in an isosceles triangle, the top angle of the triangular cross-arm is fixed from the tower body, and the bottom edge of the triangular cross-arm is parallel to the direction of the target breaking line.

Referring to FIG. 4 , the upper conductor crossarm 3 is arranged on both sides from the tower body 1 parallel to the target breaking line, and on one side facing the breaking side perpendicular to the target breaking line.

Referring to FIG. 5 , the middle conductor cross arms 4 are arranged on both sides from the tower body 1 parallel to the target breaking line, and from the tower body 1 perpendicular to the target breaking line.

Referring to Fig. 6, the lower conductor cross-arms 5 are arranged on both sides of the tower body 1 parallel to the target breaking line.

The length and spacing of the top ground wire cross arm 2, the upper layer wire cross arm 3, the middle layer wire cross arm 4, and the lower layer wire cross arm 5 need to consider the electrical distance between the wires and the ground wire, the electrical distance between the wire and the tower body, the upper and lower The minimum horizontal offset distance between adjacent conductors on a layer.

Referring to Figure 7-9, build a new basic invention pole tower below the target breaking line, set V-shaped combined insulator string 6 on the cross arm perpendicular to the direction of the target breaking line in the upper conductor cross arm and the middle layer conductor cross arm to suspend the original line conductor , the V-shaped combined insulator string is connected by two tension strings 7 horizontally arranged along the line direction, and at the same time, V-shaped connection fittings 8 are connected in the direction of the vertical line at the joints of the two tension strings 7, and the V-type connection fittings 8 are then connected to each other. Connect with cross arm. The cross arm of the upper layer conductor, the middle layer conductor cross arm, and the lower layer conductor cross arm parallel to the direction of the original line are suspended to form the line conductor after being broken, and the cross arm of the top layer ground wire facing away from the breaking side is used to hang the original line ground wire The original line and the ground wire of the broken line are suspended at the two vertices of the triangular cross-arm arranged facing the breaking side.

After the wiring method is completed and broken, a double-circuit line with different phase sequences is formed. The upper-layer conductor of the parallel original line is suspended on the cross-arm of the broken line, and is connected to the middle-phase conductor of the original line through a jumper wire. The middle phase conductor of the line after the cross arm is suspended and disconnected is connected to one side through the jumper and jumper string, and connected to the other side through the jumper; the lower conductor of the parallel original line is suspended across the lower phase The wire is connected to one side through a jumper and a jumper string, and connected to the other side through a jumper. The crossarm of the top ground wire is perpendicular to the wire of the target breaking line and hangs the ground of the target breaking line. Line, the bottom edge of the triangular ground cross-arm is suspended at the top of the cross-arm to break the ground wire and form the ground wire after breaking.

Claims (1)

1. the single loop adopting V-shape to combine string cut-offs steel pipe 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 side dorsad from tower body and arranges while cut-off the cross-arm of circuit perpendicular to target, triangular form cross-arm is on one side arranged towards cut-offfing side, three limit cross-arms of described triangle cross-arm are that isosceles triangle is arranged, from the drift angle of tower body fixed triangle shape cross-arm, the base parallel object of triangle cross-arm cut-offs line direction;

Described topping wire cross-arm cut-offs line arrangement both sides cross-arm from tower body parallel object, cut-offs line arrangement cross-arm towards cut-offfing side vertical target;

Described middle layer conductor cross-arm cut-offs line arrangement both sides cross-arm from tower body parallel object, cut-offs line arrangement both sides cross-arm from tower body vertical target;

Described lower layer conductor cross-arm cut-offs line arrangement both sides cross-arm from tower body parallel object;

The cross-arm cut-offfing line direction in described topping wire cross-arm, middle layer conductor cross-arm perpendicular to target is provided with V-type combined insulator string, described V-type combined insulator string is docked by two strain insulator-strings along line direction horizontal arrangement, on two strain insulator-string joint horizontal path directions, connect V-type simultaneously connect gold utensil, V-type connects gold utensil and is connected with cross-arm.