CN106555496A - A kind of double back overhead transmission line cable cut-offs and draws lower angle tower - Google Patents

Abstract

A double-circuit overhead transmission line cable breaker lead down corner tower, including the tower body, the top ground cross arm, the upper conductor cross arm, the middle conductor cross arm, the lower conductor cross arm, the bottom auxiliary cross arm, the cable suspension bracket and the Type-shaped cable down-lead terminal, the top-layer ground wire cross-arm, upper-layer wire cross-arm, middle-layer wire cross-arm, lower-layer wire cross-arm, and bottom-layer auxiliary cross-arm are arranged in a T shape, with the same up and down directions, and the overhead line on one side is suspended. Conduct the ground wire at an angle to the line. Beneficial effects of the present invention: the double-circuit overhead transmission line cable disconnection lead down corner tower only needs to use a base double-circuit cable disconnection tower to realize cable disconnection, the construction cost is low, the occupied area is small, and the original line arrangement is not changed It is suitable for double-circuit overhead transmission line cables to be disconnected on one or both sides, and it should be built adjacent to the straight tower.

Description

A double-circuit overhead transmission line cable breaking lead down corner tower

technical field

The invention relates to the technical field of high-voltage power transmission lines, in particular to a double-circuit overhead power transmission line cable breaking lead-down corner tower.

Background technique

In the existing double-circuit overhead transmission line cable breaking project, two-base double-circuit cable terminal towers are usually used to suspend the overhead transmission lines on both sides of the breaking point. The conventional double-circuit cable terminal tower is formed by adding a layer of auxiliary crossarm under the lower crossarm of the "drum" type double-circuit tension tower, which can suspend overhead transmission lines and realize effective fixing of cable terminals. The disadvantage of this scheme is that two bases and double-circuit pole towers need to be newly built to complete the disconnection, and the number of pole towers is large, the construction cost is high, and the occupied area is large.

Contents of the invention

The invention provides a double-circuit overhead power transmission line cable disconnection lead-down corner tower, the tower is suitable for the corner of the overhead power transmission line, can be used as a corner tower with a rotation angle of 45 degrees to 90 degrees, and can be used for one side or two sides of a double circuit The side disconnection should be built adjacent to the linear tower, which saves a base tower compared with the existing scheme, reduces the construction cost and reduces the occupied area.

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

A double-circuit overhead transmission line cable breaker lead-down corner tower, including a tower body, a top ground cross arm, an upper conductor cross arm, a middle conductor cross arm, a lower conductor cross arm, a bottom auxiliary cross arm, a cable suspension bracket and a Typeface cable down-lead terminal.

The top-layer ground wire cross-arm, the upper-layer wire cross-arm, the middle-layer wire cross-arm, the lower-layer wire cross-arm, and the bottom-layer auxiliary cross-arm are arranged in a T shape, with the same up and down direction, and are used to suspend the ground wire of an overhead line on one side, and at an angle to the line.

The upper layer wire cross arm, the middle layer wire cross arm and the lower layer wire cross arm use the cross arms on both sides to hang the outer ground wire at the corner of the transmission line, and each layer uses one side arm to hang the inner ground wire at the corner of the transmission line.

The upper conductor cross arm, the middle conductor cross arm, the lower conductor cross arm, the bottom auxiliary cross arm and the cable suspension bracket are placed between the conductor cross arms of the inner conductor at the corner of the suspension transmission line and the outer conductor cross arm at the corner of the suspension transmission line. The cable terminal is fixed between the bottom auxiliary cross arm and the lower bottom auxiliary cross arm. The fixed position is located on the cable suspension bracket extending along the conductor cross arm and the bottom auxiliary cross arm, and a cable terminal can be fixed between the cross arms.

The upper conductor cross arm, the middle conductor cross arm, the lower conductor cross arm and the bottom auxiliary cross arm, between the conductor cross arms of the outer conductor at the corner of the suspension transmission line and the inner conductor cross arm at the corner of the suspension transmission line and the lower bottom auxiliary cross arm The cable terminals can be fixed between the poles, and the fixed positions are located at the cable suspension bracket extended along the upper conductor cross arm, the middle cross arm, the cable suspension bracket extended along the lower conductor cross arm, the bottom auxiliary cross arm slightly, and between the cross arms. Fasten the two cable lugs between them.

The BU-shaped cable down-conductor terminal is composed of a cable head, a suspension insulator string and a lightning arrester. The suspension insulator string and the lightning arrester are arranged vertically. The lightning arrester is located above the suspension insulator string. The cable head and the lightning arrester form a certain angle.

Beneficial effects of the present invention: the double-circuit overhead transmission line cable disconnection lead down corner tower only needs to use a base double-circuit cable disconnection tower to realize cable disconnection, the construction cost is low, the occupied area is small, and the original line arrangement is not changed It is suitable for one-sided or double-sided disconnection of double-circuit overhead transmission line cables, and it should be built adjacent to straight 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 Figures 1-4, a double-circuit overhead transmission line cable disconnection lead-down corner tower 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, bottom auxiliary cross arm 6, cable suspension bracket 7 and B-shaped cable down-lead terminal 8.

The top ground wire cross arm 2, the upper layer wire cross arm 3, the middle layer wire cross arm 4, the lower layer wire cross arm 5, and the bottom auxiliary cross arm 6 are arranged in a T shape, with the same up and down directions, and are used to suspend the overhead line on one side. Conduct the ground wire at an angle to the line.

The upper layer wire cross arm 3, the middle layer wire cross arm 4 and the lower layer wire cross arm 5 use the cross arms on both sides to hang the outer ground wire at the corner of the transmission line, and each layer uses a cross arm to hang the inner ground wire at the corner of the transmission line.

The bu-shaped cable down-conductor terminal 8 is composed of a cable head, a suspension insulator string and a lightning arrester. The suspension insulator string and the lightning arrester are arranged vertically. The lightning arrester is located above the suspension insulator string. The cable head and the lightning arrester are at a certain angle.

The length, angle and spacing of the ground wire cross-arm and the length of the cable suspension bracket 7 are determined by the electrical distance between the BU-shaped cable terminals, the electrical distance between the cross-arm and the conductor, and the layout parameters of the BU-shaped cable terminals.

(1) When the above-mentioned double-circuit overhead transmission line cable breaks and leads down the corner tower to implement the double-circuit double-side breaking scheme.

The upper layer wire cross arm 3, the middle layer wire cross arm 4, the lower layer wire cross arm 5, the bottom auxiliary cross arm 6 and the cable suspension bracket 7 are placed between the wire cross arms of the inner wire at the corner of the suspension transmission line and at the corner of the suspension transmission line. The cable terminal is fixed between the outer conductor cross-arm and the lower bottom auxiliary cross-arm, the fixed position is located at the cable suspension bracket 7 extending along the wire cross-arm and the bottom auxiliary cross-arm, and a cable terminal is fixed between the cross-arms.

The upper layer wire cross arm 3, the middle layer wire cross arm 4, the lower layer wire cross arm 5 and the bottom auxiliary cross arm 6, between the wire cross arms of the outer wire at the corner of the suspension transmission line, the inner wire cross arm of the corner of the suspension transmission line and The cable terminals are fixed between the auxiliary cross-arms of the lower floor, and the fixed positions are located at the cable suspension bracket extending along the upper conductor cross-arm, the middle cross-arm, the cable suspension bracket extending along the lower conductor cross-arm, and the bottom auxiliary cross-arm slightly, and Fasten two cable lugs between the cross arms.

The conductors suspended at the tip of the conductor cross-arm are wound and led to the BU-shaped cable terminal located under the cross-arm by jumper wires, so as to realize double-circuit overhead transmission line double-sided cable breaking.

(2) When the above-mentioned double-circuit overhead transmission line cable breaking scheme is used for single-side breaking of the double-circuit of the lower corner tower.

The upper layer wire cross arm 3, the middle layer wire cross arm 4, the lower layer wire cross arm 5 and the bottom auxiliary cross arm 6, between the wire cross arms of the inner wire at the corner of the suspension transmission line, the inner wire cross arm of the corner of the suspension transmission line and The fixed cable terminals between the lower bottom auxiliary cross arms are cancelled, and the bottom auxiliary cross arm 6 is canceled at the same time as the cross arm below the inner wire cross arm at the corner of the suspension transmission line.

The outer conductors suspended at the tip of the conductor cross-arm are wound and led to the terminal of the B-shaped cable under the cross-arm by jumpers; the inner conductors suspended at the tip of the conductor cross-arm are directly connected to realize single-sided double-circuit overhead transmission lines cable is disconnected.

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 double-circuit overhead transmission line cable breaking lead-down corner tower 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, a lower layer wire cross arm, and a bottom auxiliary cross arm , cable suspension bracket and Bu-shaped cable down-lead terminal. 2. A double-circuit overhead transmission line cable breaker lead-down corner tower according to claim 1, characterized in that 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 bottom auxiliary cross arm is arranged in a T shape, with the same up and down directions, and is used to suspend the ground wire of the overhead line on one side. 3. A double-circuit overhead transmission line cable breaker lead-down corner tower according to claim 1, characterized in that, the upper conductor cross arm, the middle conductor cross arm and the lower conductor cross arm, each layer utilizes two lateral cross arms It is used to hang the outer ground wire at the corner of the transmission line, and each layer uses a cross arm to hang the inner ground wire at the corner of the transmission line. 4. A kind of double-circuit overhead transmission line cable breaker lead-down corner tower according to claim 1, characterized in that, the upper conductor cross arm, the middle conductor cross arm, the lower conductor cross arm, the bottom auxiliary cross arm and The cable suspension bracket is used to fix the cable terminal between the wire cross arms of the inner conductor at the corner of the suspended transmission line and between the outer conductor cross arm at the corner of the suspended transmission line and the lower bottom auxiliary cross arm. The fixed position is located along the wire cross arm and the bottom auxiliary cross arm. Cable suspension bracket with extended cross arms and a cable terminal that can be fixed between the cross arms. 5. A double-circuit overhead transmission line cable breaker lead-down corner tower according to claim 1, characterized in that, the upper conductor cross arm, the middle conductor cross arm, the lower conductor cross arm and the bottom auxiliary cross arm, Cable terminals can be fixed between the conductor cross-arms of the outer conductors at the corners of the suspended transmission lines, between the inner conductor cross-arms at the corners of the suspended transmission lines and the auxiliary cross-arms at the lower bottom layer. Extended cable suspension bracket, lower conductor cross arm and cable suspension bracket extended along the bottom auxiliary cross arm, and two cable terminals are fixed between the cross arms. 6. A kind of double-circuit overhead transmission line cable breaking down-lead corner tower according to claim 1, characterized in that, the D-shaped cable down-lead terminal is composed of a cable head, a suspension insulator string and a lightning arrester, and the suspension insulator The strings and arresters are arranged vertically, and the arresters are located above the suspension insulator strings.