CN205000712U - Single loop cut -offs into steel pipe shaft tower that different phase sequences were arranged - Google Patents

Abstract

The utility model relates to a steel pipe pole tower in which a single circuit is broken and arranged in different phase sequences. 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. A triangular cross-arm is arranged facing the breaking side; the upper conductor cross-arm is arranged from the tower body to the breaking side and one triangular cross-arm is arranged; the three sides of the triangular cross-arm are arranged in an isosceles The tower body fixes the top angle of the triangular cross-arm, and the bottom edge of the triangular cross-arm is parallel to the target breaking line direction. The utility model 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 to continue routing after disconnection, reduces the electric field intensity of the conductor space, and avoids the use of double-circuit branch poles. Do not change the wire layout of adjacent towers.

Description

A steel pipe tower with single circuit breaking and arranged in different phase sequences

Technical field:

The utility model relates to the technical field of high-voltage transmission lines, in particular to a steel pipe pole tower in which a single circuit is disconnected and arranged in different phase sequences.

Background technique:

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

1) A base double-circuit tension bar is built below the disconnected line, and the cross-arm of the tension bar is arranged parallel to the direction of the interrupted line. The single-circuit lines erected with steel pipe poles are usually arranged in an "up" shape, and the conductors on both sides of the double-circuit lines erected with steel pipe poles are usually arranged vertically, which may easily cause the suspension strings of adjacent straight tower conductors to deviate from the vertical state, which cannot meet the requirements. The possibility of the original single-circuit tower electrical clearance requirements.

2) Create a new two-base single-circuit tension rod under the disconnected line, disconnect the line and connect it to the double-circuit tension rod to continue routing. The number of new single-circuit tension poles and towers is large, the area is large, the corridor is wide, and the investment and implementation of the project are relatively difficult.

In order to reduce the influence of the electromagnetic environment around the transmission line, 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 this utility model is to provide a kind of steel pipe pole tower with single circuit breaking and arranged in different phase sequences. Only one base pole tower is used to realize the problem of single circuit breaking, reduce the number of new pole towers, and form different phase sequences after breaking. The loop continues to route, reducing the electric field intensity of the conductor space, avoiding the use of double-circuit branch poles, and not changing the conductor layout of adjacent towers.

In order to solve the problems existing in the background technology, the utility model adopts the following technical solutions: it includes a tower body, a top ground wire cross arm, 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 The top-layer 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 cross arm on the top floor is arranged from the back of the tower body to the breaking side, and a cross arm perpendicular to the target breaking line is arranged, and a triangular cross arm is arranged facing the breaking side;

The upper conductor cross-arm is arranged with a triangular cross-arm facing the breaking side from the tower body;

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, and the bottom edge of the triangular cross-arm is parallel to the target breaking line direction;

The cross-arms of the middle-level conductors and the lower-level conductors are arranged from the back of the tower to the breaking side and perpendicular to the target breaking line. One side of the cross-arm is arranged parallel to the direction of the target breaking line. One side of the cross-arm is arranged at an acute angle, and the cross-arm of the middle-level conductor and the side of the lower-level conductor cross-arm arranged from the tower body parallel to the direction of the target breaking line face in the opposite direction. One side of the cross arm arranged at an acute angle from the tower body to the target breaking line, the projection of the cross arm perpendicular to the direction of the target breaking line faces the breaking side, and the projection of the direction of the parallel target breaking line is opposite to the direction of the parallel target breaking line of the same layer.

The utility model has the following advantages:

1) Compared with the existing scheme 1, the wire layout of the target breaking line is not changed, which reduces the possibility of the original single-circuit tower electrical clearance requirement;

2) Compared with the existing scheme 2, only one basic invention tower is used to complete the single-circuit breaking, forming a double-circuit line to continue routing, reducing the number of new towers and the occupied area;

3) After the disconnection, the double-circuit line continues to be routed. 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;

4) Double-loop wiring with different phase sequences is formed after breaking, which reduces the electric field strength of the wire space;

5) 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.

Description of drawings:

Fig. 1 is the structural representation of utility model;

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 wiring of the utility model.

detailed description:

Referring to Figures 1-2, the utility model includes a tower body 1, a top ground wire cross arm 2, an upper layer wire cross arm 3, a middle layer wire cross arm 4, and a lower layer wire cross arm 5. The top of the tower body 1 is provided with a top 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 ground wire crossarm 2 on the top floor is arranged from the back of the tower body 1 to the breaking side, and a crossarm perpendicular to the target breaking line is arranged, and a triangular crossarm is arranged facing the breaking side.

Referring to Fig. 4, the upper conductor cross arm 3 is arranged with a triangular cross arm from the tower body 1 to the breaking side.

Referring to 3-4, the three-sided cross-arms of the above-mentioned triangular cross-arms are arranged in an isosceles triangle, and the top angle of the triangular cross-arms is fixed from the tower body 1, and the bottom edge of the triangular cross-arms is parallel to the target breaking line direction, and the triangular cross-arms The height of the apex perpendicular to the bottom is determined by the arrangement of the ground wires of the target breaking line, and the length of the bottom of the triangle cross-arm is determined by the arrangement of the ground wires of the double-circuit circuit formed by breaking.

Referring to Figures 5-6, the middle layer conductor cross arm 4 and the lower layer conductor cross arm 5 are arranged on one side of the cross arm from the back of the tower body 1 to the breaking side and perpendicular to the target breaking line, and arranged parallel to the direction of the target breaking line. One cross arm is arranged at an acute angle with the direction of the target breaking line, and the middle layer conductor cross arm 4 is opposite to the direction of the side cross arm parallel to the direction of the target breaking line arranged from the tower body 1 in the lower layer conductor cross arm 5, Among the middle conductor crossarm 4 and the lower conductor crossarm 5, one side crossarm is arranged at an acute angle from the tower body 1 to the target breaking line. The direction projection is opposite to the direction crossarm of the parallel target breaking line on the same layer.

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.

With reference to Fig. 7, build a steel pipe pole tower with a single circuit break of the basic invention arranged in different phase sequences below the target breaking line, hang the upper phase of the target breaking line conductor in the middle phase line conductor on the upper conductor cross arm 3 middle triangular cross arm At the apex of the cross-arm on the bottom side, the cross-arm in the middle conductor cross-arm 4 which forms an acute angle with the target breaking line points to the side where the projection of the direction of the target breaking line points, and the two-phase side conductors of the target breaking line on this side are respectively connected to To the crossarm 4 of the middle conductor crossarm 4 that is perpendicular to the target breaking line and on the crossarm forming an acute angle with the target breaking line, the connection method of the lower conductor crossarm 5 is the same as that of the middle conductor crossarm 4, and the breaking line is suspended At the apex of the triangular-shaped cross-arm bottom cross-arm in the upper-layer conductor cross-arm 3, one cross-arm in the parallel line direction of the middle-layer conductor cross-arm 4 and the lower-layer conductor cross-arm 5 and one side cross-arm forming an acute angle with the target breaking line , using jumper wires and jumper strings suspended in the direction of the parallel target breaking line to realize the connection of the line and the adjustment of the phase sequence.

Claims (1)

1. a single loop cut-offs into the steel pipe tower of different phase sequence arrangement, 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, arranges triangular form cross-arm towards cut-offfing side;

Described topping wire cross-arm arranges triangle cross-arm on one side from tower body 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 middle layer conductor cross-arm, lower layer conductor cross-arm cut-offs side dorsad from tower body and cut-offs circuit perpendicular to target all arranges cross-arm on one side, parallel object cut-offs line direction and arranges cross-arm on one side, cut-off line direction with target to acutangulate and arrange cross-arm on one side, to cut-off one side cross-arm of line direction contrary towards direction for described middle layer conductor cross-arm and the target that is parallel to of arranging from tower body in lower layer conductor cross-arm, described middle layer conductor cross-arm, cut-off from tower body and target one side cross-arm that circuit acutangulates layout in lower layer conductor cross-arm, cross-arm vertical target cut-offs line direction projection towards cut-offfing side, parallel object cut-offs line direction projection, and to cut-off line direction cross-arm contrary with same layer parallel object.