CN212478730U

CN212478730U - 230kV double-loop self-type transposition tower based on American standard

Info

Publication number: CN212478730U
Application number: CN202020307464.8U
Authority: CN
Inventors: 李雪; 杨礼东
Original assignee: Northeast Electric Power Design Institute of China Power Engineering Consulting Group
Current assignee: Northeast Electric Power Design Institute of China Power Engineering Consulting Group
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2021-02-05
Anticipated expiration: 2030-03-13

Abstract

The utility model provides a 230kV double circuit self transposition tower based on beautiful standard which characterized in that: the wire-jumping device comprises an upper wire cross arm, a middle wire cross arm and a lower wire cross arm, wherein each layer of wire cross arm is provided with two phases of wires, the ends of the upper wire cross arm and the lower wire cross arm are connected through an insulator string for wire transposition, the end of the middle wire cross arm is provided with a wire jumping point, the left side and the right side of the wire jumping point of the end parts of the upper wire cross arm and the lower wire cross arm and the middle wire cross arm are respectively provided with a wire jumping point, and the corresponding upper, middle and lower three wire jumping points are respectively connected through an insulation string. The utility model discloses owing to reduced two independent transposition framves and wire jumper support, consequently very big saving iron tower steel and basic concrete's quantity, economic benefits is very considerable. The transposition tower can meet various ice area requirements, and the survey and design in the early stage and the later stage are simpler than those of a split transposition tower, and the transposition tower has reliable performance and convenient application.

Description

230kV double-loop self-type transposition tower based on American standard

Technical Field

The utility model relates to a 230kV double circuit self formula transposition tower of power transmission line especially relates to a 230kV double circuit self formula transposition tower based on beautiful mark.

Background

Because the distances of the power transmission lines are long, and the distances between the wires are unequal. When the live wire works, the wires generate earth magnetic fields and influence each other, and the effects are gradually accumulated along with the distance of the wires. Therefore, if the phases of the wires are not switched, the resulting balanced voltage and current adversely affect the operation of the generator and radio communication. The line transposition function is to reduce the asymmetry of voltage and current when the power system normally operates, and limit the influence of the transmission line on the communication line. The traditional transposition tower is designed according to Chinese standards, a split type transposition tower is adopted, the steel consumption is large, the occupied area is wide, the requirement of international engineering on American standards cannot be met, and the economy is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a 230kV double loop self formula transposition tower based on beautiful mark adopts beautiful mark design, satisfies international engineering requirement to greatly reduced steel use amount, the area that reduces the iron tower.

In order to achieve the above object, the present invention provides a 230kV double-loop self-type transposition tower based on American standard, which is characterized in that: the wire-jumping device comprises an upper wire cross arm, a middle wire cross arm and a lower wire cross arm, wherein each layer of wire cross arm is provided with two phases of wires, the ends of the upper wire cross arm and the lower wire cross arm are connected through an insulator string for wire transposition, the end of the middle wire cross arm is provided with a wire jumping point, the left side and the right side of the wire jumping point of the end parts of the upper wire cross arm and the lower wire cross arm and the middle wire cross arm are respectively provided with a wire jumping point, and the corresponding upper, middle and lower three wire jumping points are respectively connected through an insulation string.

The upper, middle and lower wire cross arms are all in a pointed shape, which is beneficial to reducing auxiliary materials, thereby reducing the use amount of steel materials in a limited way.

And jumper adjusting plates are arranged at two ends of the lower wire cross arm and used for adjusting tension borne by the jumper and the insulator string between the upper cross arm and the lower cross arm, so that sufficient electrical clearance and proper component stress are ensured.

The utility model discloses owing to reduced two independent transposition framves and wire jumper support, consequently very big saving iron tower steel and basic concrete's quantity, economic benefits is very considerable. The transposition tower can meet various ice area requirements, and the survey and design in the early stage and the later stage are simpler than those of a split transposition tower, and the transposition tower has reliable performance and convenient application. The concrete advantages are embodied in the following four points:

1. the ASCE10-97 full-American national standard design is adopted, so that the economic effect is obvious;

2. the double-loop transposition of the same tower avoids the traditional split transposition tower and reduces the floor area of the iron tower;

3. the transposition tower does not adopt a traditional jumper support, but the end parts of the upper wire cross arm and the lower wire cross arm are connected by using the insulator string for wire transposition, and the middle wire cross arm is directly provided with jumper points at the end parts and does not adopt the jumper support, so that the structure is simple, the force transmission route is clear, and the tower weight of the transposition tower is greatly reduced;

4. the wire cross arm is in a pointed shape, which is beneficial to reducing auxiliary materials, thereby reducing the use amount of steel materials in a limited way.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of the double-circuit hanging wire of the present invention.

Detailed Description

Referring to fig. 1, the present invention specifically implements: the head of the transposition tower comprises an upper layer of wire cross arm 1, a middle layer of wire cross arm 2 and a lower layer of wire cross arm 5, the main material of the body of the iron tower is in one-step slope-changing design, the stress is more reasonable, and the appearance is relatively attractive. The ends of the upper wire cross arm and the lower wire cross arm are connected by an insulator string 3 for wire transposition, the end of the middle wire cross arm is provided with a jumper point 7, the left and right sides of the upper wire cross arm and the lower wire cross arm corresponding to the jumper point at the end of the middle wire cross arm are respectively provided with a

jumper point

6, 8, and the corresponding upper, middle and

lower jumper points

8, 7 and 6 are respectively connected by the insulator string. And jumper adjusting plates 4 are arranged at two ends of the lower lead cross arm 5 and used for adjusting tension borne by the jumper and the insulator string between the upper cross arm and the lower cross arm, so that sufficient electrical clearance and proper component stress are ensured.

Referring to fig. 2, two phases of wires are arranged on each wire cross arm of the upper, middle and lower layers, and no longitudinal jumper cross arm is arranged. The transposition mode is as follows:

1. upper phase conductor A

Upper phase wire hanging point (front side) → middle phase wire hanging point (back side)

2. Middle phase conductor B

Middle phase conductor hanging point (front side) → lower phase conductor hanging point (rear side)

3. Lower phase conductor C

Lower phase wire hanging point (front side) → upper phase wire hanging point (back side)

4. Upper phase wire A'

Lower phase conductor hanging point (front side) → middle phase conductor hanging point (back side)

5. Middle phase conductor B'

Middle phase conductor hanging point (front side) → upper phase conductor hanging point (back side)

6. Lower phase conductor C'

Upper phase wire hang point (front side) → lower phase wire hang point (back side).

Claims

1. The utility model provides a 230kV double circuit self transposition tower based on beautiful standard which characterized in that: the wire-jumping device comprises an upper wire cross arm, a middle wire cross arm and a lower wire cross arm, wherein each layer of wire cross arm is provided with two phases of wires, the ends of the upper wire cross arm and the lower wire cross arm are connected through an insulator string for wire transposition, the end of the middle wire cross arm is provided with a wire jumping point, the left side and the right side of the wire jumping point of the end parts of the upper wire cross arm and the lower wire cross arm and the middle wire cross arm are respectively provided with a wire jumping point, and the corresponding upper, middle and lower three wire jumping points are respectively connected through an insulation string.

2. The American standard-based 230kV double-loop self-transposition tower as claimed in claim 1, wherein: the upper, middle and lower wire cross arms are all in a pointed shape.

3. The American standard-based 230kV double-loop self-transposition tower as claimed in claim 1, wherein: and jumper adjusting plates are arranged at two ends of the lower wire cross arm.