CN106555502A - A kind of special steel tower cut-off suitable for single time overhead transmission line cable - Google Patents

Abstract

A special iron tower suitable for single-circuit overhead line cable disconnection, including tower body, ground wire cross arm, upper conductor cross arm, middle conductor cross arm, lower auxiliary cross arm, cable suspension bracket and B-shaped cable down-lead terminal The top of the tower body is provided with a ground wire cross arm, and the cross arms on both sides are arranged from the vertical line direction of the tower body; The middle-phase conductor is fixed by the tension string on the cross-arm, and the B-shaped cable terminal is fixed on the cross-arm. Beneficial effects of the present invention: the tension tower applicable to single-circuit overhead transmission line cable breaking with small corners only needs to use one base iron tower to realize cable breaking, the construction cost is low, the occupied area is small, and no change is required. The original line arrangement is suitable for the construction of adjacent straight towers and can be used as corner towers.

Description

A special iron tower suitable for breaking single-circuit overhead line cables

technical field

The invention relates to the technical field of high-voltage transmission lines, in particular to a special iron tower suitable for disconnecting cables of single-circuit overhead lines.

Background technique

At present, existing solutions in the prior art usually adopt two solutions, and the specific solutions are as follows:

(1) Two-base single-circuit cable terminal towers are used, and jumpers are used to guide the wires to the connection of the suspension string, the arrester and the cable head, so as to realize the disconnection and down-leading of the line, but the construction cost and the occupied area are relatively large. Not conducive to implementation.

(2) Adopt a base double-circuit cable terminal tower, use the single-side wire cross arm of the double-circuit terminal tower to hang the wire, and lead the wire to the cable terminal through the jumper wire, so as to realize the disconnection and down-leading of the overhead line cable. However, the construction cost is relatively high, the tower base covers a large area, and the vertical arrangement of the conductor suspension points at the breaking point is different from the conventional triangular or upper font arrangement, which causes the suspension strings of adjacent straight tower conductors to deviate from the vertical state. When the electrical clearance does not meet the requirements, the adjacent tower needs to be rebuilt, which will greatly increase the construction cost and occupied area.

Contents of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a special iron tower suitable for single-circuit overhead line cable disconnection. The original line arrangement is suitable for the construction of adjacent straight towers and can be used as corner towers.

The technical solution adopted by the present invention to solve the problems of the technologies described above is;

A special iron tower suitable for single-circuit overhead line cable disconnection, including tower body, ground wire cross arm, upper conductor cross arm, middle conductor cross arm, lower auxiliary cross arm, cable suspension bracket and B-shaped cable down-lead terminal .

The top of the tower body is provided with ground wire cross arms, and the two side cross arms are arranged vertically from the tower body.

The upper layer wire cross arm is installed under the ground wire cross arm, and the two side cross arms are arranged from the tower body parallel to the line direction, the middle phase conductor is fixed in a tension string at the cross arm, and the BU-shaped cable terminal is fixed at the cross arm .

The cross arm of the middle conductor is installed under the cross arm of the upper conductor, arranged in a cross shape, and the cross arms on both sides are arranged from the vertical direction of the tower body, and the tension string is fixed at the slightly part of the cross arm to hang the side-phase conductor, and the cross arm is arranged at the slightly part The cable suspension bracket fixes the B-shaped cable terminal; the cross arms on both sides are arranged from the tower body parallel to the line direction, and the cable suspension bracket is set at the apex of the cross arm to fix the B-shaped cable terminal.

The auxiliary cross arm of the lower layer is installed under the cross arm of the middle layer conductor, and is arranged in a cross shape. The cross arms on both sides are arranged parallel to the direction of the line from the tower body, and the cable suspension bracket is set at the slightly part of the cross arm to fix the B-shaped cable terminal; vertically from the tower body The cross-arms on both sides are arranged in the direction of the line, and the cable suspension brackets are set at the apex of the cross-arms to fix the B-shaped cable terminals.

The bu-shaped cable down-conductor terminal is composed of a cable head, a suspension insulator string and a lightning arrester, and is located between the upper conductor cross-arm and the middle conductor cross-arm, the middle conductor cross-arm and the lower auxiliary cross-arm.

Beneficial effects of the present invention: the tension tower applicable to single-circuit overhead transmission line cable breaking with small corners only needs to use one base iron tower to realize cable breaking, the construction cost is low, the occupied area is small, and no change is required. The original line arrangement is suitable for the construction of adjacent straight towers and can be used as corner towers.

Description of drawings

Further description will be given below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the front view of the present invention;

Fig. 2 is a side view of the present invention;

Fig. 3 is the wiring diagram of the present invention;

FIG. 4 is a top view of FIG. 3 .

detailed description

As shown in Figure 1-Figure 4, a special iron tower suitable for single-circuit overhead line cable breaking, including tower body 1, ground wire cross arm 2, upper conductor cross arm 3, middle conductor cross arm 4, and lower auxiliary cross arm Bear 5, cable suspension bracket 6 and Bu-shaped cable down-lead terminal 7.

The top of the tower body 1 is provided with a ground wire cross arm 2, and the two side cross arms are arranged from the tower body 1 perpendicular to the line direction.

The upper conductor cross arm 3 is installed below the ground wire cross arm 2, and the two side cross arms are arranged from the tower body 1 parallel to the line direction, and the middle phase conductor 8 is fixed in a tension string at the cross arm, and fixed at the cross arm. font cable terminal 7.

The middle layer conductor cross arm 4 is installed under the upper layer conductor cross arm 3 in a cross-shaped arrangement, and the two side cross arms are arranged from the tower body 1 perpendicular to the line direction. A cable suspension bracket 6 is arranged at the slightly portion to fix the B-shaped cable terminal 7; horizontal arms on both sides are arranged from the tower body 1 parallel to the line direction, and a cable suspension bracket 6 is set at the slightly portion of the cross-arm to fix the B-shaped cable terminal 7.

The auxiliary cross arm 5 of the lower layer is installed below the middle conductor cross arm 4, and is arranged in a cross shape, and the cross arms on both sides are arranged parallel to the line direction of the tower body, and a cable suspension bracket 6 is set at the cross arm to fix the B-shaped cable terminal 7; Arrange cross arms on both sides from the vertical line direction of the tower 1 body, and set a cable suspension bracket 6 on the cross arm to fix the B-shaped cable terminal 7.

The bu-shaped cable down-conductor terminal 7 is composed of a cable head, a suspension insulator string and a lightning arrester, and is located between the upper conductor cross-arm 3 and the middle conductor cross-arm 4 , the middle conductor cross-arm 4 and the lower auxiliary cross-arm 5 .

The middle-phase conductor 8 is led to the bottom of the conductor by jumper wires, and the down-lead terminal 7 of the U-shaped cable between the upper-layer conductor cross-arm 3 and the middle-layer conductor cross-arm 4; The down-lead terminal 7 of the B-shaped cable between the middle-level conductor cross-arm 4 and the lower-level auxiliary cross-arm 5 ; the phase conductor of the other return side is wound and led to the middle-level conductor cross-arm 4 and the lower-level auxiliary cross-arm 5 of the parallel line by using a jumper wire The BU-shaped cable between leads down the terminal 7.

The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of illustration and description, and are not intended to limit the present invention to the scope of the described embodiments. In addition, those skilled in the art can understand that the present invention is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the claimed scope of the present invention. within the range.

Claims (6)

1. A special iron tower suitable for single-circuit overhead line cable disconnection, characterized in that it includes a tower body, a ground wire cross arm, an upper-level conductor cross-arm, a middle-level conductor cross-arm, a lower floor auxiliary cross-arm, a cable suspension bracket and a Typeface cable down-lead terminal. 2. A special iron tower suitable for single-circuit overhead line cable disconnection according to claim 1, characterized in that, the top of the tower body is provided with a ground wire cross arm, and the two side cross arms are arranged perpendicular to the line direction from the tower body . 3. A special iron tower suitable for single-circuit overhead line cable disconnection according to claim 1, characterized in that the upper conductor cross arm is installed under the ground wire cross arm, and the two sides are arranged parallel to the line direction from the tower body Cross-arm, fix the tension string to hang the middle phase conductor at the slightly part of the cross-arm, and fix the B-shaped cable terminal at the slightly part of the cross-arm. 4. A special iron tower suitable for breaking single-circuit overhead line cables according to claim 1, characterized in that the middle-level conductor cross-arm is installed under the upper-level conductor cross-arm in a cross-shaped arrangement. Arrange cross-arms on both sides perpendicular to the direction of the line, fix the tension string and suspend side-phase conductors at the slightly part of the cross-arm, and set up cable suspension brackets at the slightly part of the cross-arm to fix the B-shaped cable terminals; A cable suspension bracket is provided at the cross arm to fix the B-shaped cable terminal. 5. A special iron tower suitable for breaking cables of single-circuit overhead lines according to claim 1, characterized in that the auxiliary cross-arm of the lower layer is installed under the cross-arm of the middle-level conductors in a cross-shaped arrangement, and the tower body Arrange cross-arms on both sides parallel to the line direction, and set cable suspension brackets at the top of the cross-arms to fix the B-shaped cable terminals; arrange cross-arms on both sides perpendicular to the line from the tower body, and set cable suspension brackets at the top of the cross-arms to fix the B-shaped cable terminals . 6. A special iron tower suitable for breaking single-circuit overhead line cables according to claim 1, wherein the down-conductor terminal of the B-shaped cable is composed of a cable head, a string of hanging insulators and a lightning arrester, and is located on the upper floor Between the conductor cross-arm and the middle-level conductor cross-arm, between the middle-level conductor cross-arm and the lower-level auxiliary cross-arm.