CN205046917U - Two return circuits unilateral cut -offs cable and draws tangent tower down - Google Patents

Abstract

The double-circuit one-side breaking cable leads down the straight line tower, which 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. Auxiliary upper cross-arm, a cable-assisted middle cross-arm is set at the position of the conductor cross-arm in the middle layer of the tower body, a cable-assisted lower cross-arm is set at the position of the lower conductor cross-arm of the tower body, and a cable-assisted lower cross-arm is installed under the cable-assisted lower cross-arm. As for the auxiliary bottom cross-arm, V-shaped combined insulator strings are respectively hung under the upper-layer wire cross-arm, the middle-layer wire cross-arm, and the lower-layer wire cross-arm on the side of the target breaking line. The utility model avoids replacing the straight tower with the strain tower as the cable lead-down tower in the conventional line, and effectively solves the problem of changing the tower type for cable disconnection, which leads to a large cross-arm layer spacing between the conductors of the tower and an increase in the overall height of the tower 1. The consumption of steel and the amount of basic engineering increase correspondingly, and the disadvantages of poor economy.

Description

Double-circuit single-side breaking cable down-lead straight tower

Technical field:

The utility model relates to the technical field of high-voltage transmission lines, in particular to a double-circuit single-side breaking cable down-lead straight tower.

Background technique:

When the double-circuit straight tower of the existing high-voltage transmission line needs to be disconnected on one side, the pole tower needs to be replaced with a tension tower. The tension tower has the advantages of simple structure and convenient installation of jumpers. The disadvantages are:

1) This breaking method needs to change the straight tower to the tension tower, which increases the cost of steel and foundation, and the economy is poor.

2) In this breaking mode, the layer spacing between the conductors is large, the horizontal offset between the conductors is small, and the width of the corridor is relatively large.

Invention content:

The purpose of this utility model is to provide a double-circuit single-side breaking cable down-leading straight tower, which avoids replacing the straight-line tower with a strain-resistant tower as a cable down-leading tower in conventional lines, and effectively solves the problem of replacing the cable for breaking the cable. The tower type leads to a large distance between the cross-arm layers between the conductors of the tower, resulting in an increase in the overall height of the tower, a corresponding increase in steel consumption and foundation engineering, and poor economic efficiency.

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, the lower-layer wire cross-arm is arranged under the middle-layer wire cross-arm, and the top-layer ground wire cross-arm , The upper conductor crossarm, the middle conductor crossarm, and the lower conductor crossarm are all perpendicular to the line direction. A cable auxiliary upper crossarm is installed at the position of the upper conductor crossarm on the tower body, and a cable is installed at the middle conductor crossarm position of the tower body. Auxiliary middle cross arm, a cable auxiliary lower cross arm is set at the position of the conductor cross arm on the lower layer of the tower body, and a cable auxiliary bottom cross arm is arranged below the cable auxiliary lower cross arm, the cable auxiliary upper cross arm, cable auxiliary middle cross arm The pole, the cable-assisted lower cross-arm, and the cable-assisted bottom cross-arm are all parallel to the line direction, and V-shaped combined insulator strings are hung under the upper-layer conductor cross-arm, middle-layer conductor cross-arm, and lower-layer conductor cross-arm respectively on the side of the target breaking line. The V-shaped combined insulator strings are butted by two tension strings arranged horizontally along the line direction, and V-shaped connecting fittings are connected vertically to the line direction at the junction of the two tensioning strings, and the V-shaped connecting fittings are then connected to the cross arm.

The utility model has the following advantages:

(1) The utility model avoids changing the linear tower to a strain tower, reduces the amount of steel and foundation used, and saves construction costs.

(2) In the utility model, the upper, middle and lower insulator strings on the target breaking line side are designed with V-shaped combined insulator strings, which can compress the width of the tower head and reduce the occupation of line corridors without changing the force characteristics of the insulator strings.

(3) The utility model adopts a V-shaped hanging series design on the upper, middle and lower insulator strings on the other side of the double circuit, which can effectively reduce the wind deflection of the conductors and reduce the width of the line corridor.

(4) The utility model improves the applicability and reduces the requirements for the target circuit.

Description of drawings:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic structural diagram of a V-shaped combined insulator string;

Fig. 3 is a left view of the V-shaped connecting fitting in Fig. 2 .

detailed description:

Referring to Figures 1-3, 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, and the top of the tower body 1 is provided with a top ground wire arm. The wire cross arm 2, the upper layer wire cross arm 3 is arranged under the top layer ground wire cross arm 2, the middle layer wire cross arm 4 is arranged under the upper layer wire cross arm 3, and the lower layer wire cross arm 5 is arranged under the middle layer wire cross arm 4. The ground wire cross arm 2 on the top layer, the upper layer wire cross arm 3, the middle layer wire cross arm 4, and the lower layer wire cross arm 5 are all perpendicular to the line direction, and a cable auxiliary upper cross arm 6 is set at the position of the upper wire cross arm 3 on the tower body 1, A cable auxiliary middle cross arm 7 is provided at the position of the conductor cross arm 4 in the middle layer of the tower body 1, a cable auxiliary lower cross arm 8 is provided at the position of the lower conductor cross arm 5 of the tower body 1, and a cable auxiliary lower cross arm 8 is arranged below the cable auxiliary cross arm 8. There is a cable auxiliary bottom cross arm 9, and the cable auxiliary upper cross arm 6, the cable auxiliary middle cross arm 7, the cable auxiliary lower cross arm 8, and the cable auxiliary bottom cross arm 9 are all parallel to the line direction. Between the cable auxiliary upper cross arm 6 and the cable auxiliary middle cross arm 7, between the cable auxiliary middle cross arm 7 and the cable auxiliary lower cross arm 8, between the cable auxiliary lower cross arm 8 and the cable auxiliary bottom cross arm 9 Arresters and supporting insulators are provided, the arresters are arranged at the top, and the supporting insulators are arranged at the bottom, and cable terminals are connected between the arresters and the supporting insulators. When the cables are led down, the target breaking line is connected to the corresponding cable on the terminal.

V-shaped combined insulator strings 10 are respectively suspended below the upper-layer conductor cross-arm 3, the middle-layer wire cross-arm 4, and the lower-layer wire cross-arm 5 on the side of the target breaking line. Two tension strings are butted, and at the same time, V-shaped connecting fittings are connected in the direction of the vertical line at the joints of the two straining strings. By arranging V-shaped combined insulator strings, the wires on both sides of the line are not conducted through the jumper wires. Under the condition of satisfying the electrical gap, the jumper wires are used to lead from the wires at both ends to the cable terminal, so as to complete the target line breaking cable lead.

There are V-shaped suspension insulator strings suspended below the upper-layer conductor cross-arm 3, the middle-layer wire cross-arm 4, and the lower-layer wire cross-arm 5 on the other non-breaking line side of the double circuit. The V-shaped suspension insulator string connects the other circuit The line is normally restored.

The utility model adopts the layout method of the straight tower lead down, and the upper, middle and lower insulator strings of the target breaking line adopt V-shaped combined insulator strings, which can effectively reduce the wind deflection of the wires, reduce the width of the line corridor, and at the same time ensure that the force of the pole and the tower is satisfied. Under the condition of electrical clearance, the problem of breaking the cable of the straight tower is solved, and at the same time, the small horizontal offset of the conductors and the large distance between the cross-arm layers between the conductors lead to an increase in the overall height of the tower, and a corresponding increase in steel consumption and foundation engineering. The disadvantage of poor economy.

Claims (1)

1. The straight-line tower with double-circuit single-side breaking cable lead is characterized in that it includes a tower body, a top floor ground wire cross arm, an upper layer wire cross arm, a middle layer wire cross arm, and a lower layer wire cross arm. The top of the tower body is set There is a top-layer ground wire cross-arm, an upper-layer wire cross-arm is arranged under the top-layer wire cross-arm, a middle-layer wire cross-arm is arranged under the upper-layer wire cross-arm, a lower-layer wire cross-arm is arranged under the middle-layer wire cross-arm, and the top-layer ground wire cross-arm The pole, the upper conductor crossarm, the middle conductor crossarm, and the lower conductor crossarm are all perpendicular to the line direction. There is a cable auxiliary upper crossarm at the position of the upper conductor crossarm on the tower body, and a cable auxiliary crossarm at the middle conductor crossarm position of the tower body. Cable-assisted middle cross arm, a cable-assisted lower cross-arm is set at the position of the conductor cross-arm on the lower layer of the tower body, and a cable-assisted bottom cross-arm is arranged below the cable-assisted lower cross-arm. The cable-assisted upper cross-arm, cable-assisted middle The crossarm, cable-assisted lower crossarm, and cable-assisted bottom crossarm are all parallel to the line direction, and V-shaped composite insulator strings are hung under the upper conductor crossarm, middle conductor crossarm, and lower conductor crossarm respectively on the target breaking line side. , the V-shaped combined insulator string is connected by two tension strings arranged horizontally along the line direction, and at the same time, V-shaped connection fittings are connected in the direction of the vertical line at the joint of the two tension strings, and the V-type connection fittings are then connected to the cross arm .