CN210888265U

CN210888265U - Open loop tower

Info

Publication number: CN210888265U
Application number: CN201921039887.XU
Authority: CN
Inventors: 李凯; 曾亮; 张亦斌; 夏志祥; 胡华; 常虎; 罗云棋; 胡涛; 朱佳星; 季硕; 杨宇
Original assignee: Jingzhou Jingli Engineering Design Consulting Co ltd
Current assignee: Jingzhou Jingli Engineering Design Consulting Co ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-06-30
Anticipated expiration: 2029-07-05

Abstract

The utility model relates to a transmission line shaft tower field, especially an open loop tower, including the shaft tower body, its characterized in that: be provided with ground wire cross arm, first wire cross arm, second wire cross arm and third wire cross arm along shaft tower body top-down, ground wire cross arm, first wire cross arm, second wire cross arm and third wire cross arm all be "Y" shape and arrange. The utility model discloses a unique part lies in: when the power transmission line is subjected to pi connection transformation, only 1-base tower needs to be newly built, so that the investment is low, and the land encroachment can be reduced.

Description

Open loop tower

Technical Field

The utility model relates to a transmission line shaft tower field, especially an open loop tower.

Background

With the gradual improvement of the urbanization degree, the accelerated development of modern city construction, the reconstruction, expansion and new construction of enterprises in industrial development areas and the increase of power consumption and load density, the distribution of transformer substations tends to become compact. In order to perfect the grid structure of a power grid and improve the reliability and safety of the power grid, a 110kV voltage class transmission line is widely used in a single pi mode and a double pi mode, a pi line is relatively simple for a cable line, a proper open loop point position is found, an intermediate joint is manufactured, and the overhead line generally has three modes of a single pi mode, a double single pi mode and a double pi mode. In the existing power transmission line, the pi technology is generally realized by adopting a 2-3 base terminal tower, a single pi sometimes forms a triangular shape after the implementation of a double-circuit power transmission line is finished, two line corridors can be formed under the double-pi condition according to the position difference of an open loop point, although the technical scheme is mature, in an area with less land resources, the newly-built 2-3 base terminal tower not only has large investment, but also occupies a large amount of land resources.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an open loop tower only needs newly-built 1 basic tower when carrying out pi to connect the transformation to transmission line, not only drops into and can also reduce and occupy to invading of soil for a short time.

Realize the utility model discloses the technical scheme of purpose is: the utility model provides an open loop tower, includes shaft tower body, its characterized in that: be provided with ground wire cross arm, first wire cross arm, second wire cross arm and third wire cross arm along shaft tower body top-down, ground wire cross arm, first wire cross arm, second wire cross arm and third wire cross arm all be "Y" shape and arrange.

And the ground wire cross arm, the first wire cross arm, the second wire cross arm and the third wire cross arm are all composed of three cross arm bodies which are arranged in a Y shape by taking the tower body as a circle center, and the cross arm bodies are connected with the tower body through two connecting pieces.

And the two connecting pieces are a pair of reinforcing plates arranged in parallel, one end of each reinforcing plate is connected with the tower body, the other end of each reinforcing plate extends out of the tower body, a series of corresponding mounting hole positions are arranged on the inner side of each reinforcing plate and the two sides of the cross arm body, and bolts penetrate through the mounting hole positions to connect the reinforcing plates with the cross arm body.

And the end of the cross arm body extending outwards is provided with a tension string wire hanging plate and a jumper wire string wire hanging plate.

And the transverse length of the second wire cross arm is greater than that of the first and third wire cross arms, and the transverse length of the ground wire cross arm is less than that of the first and third wire cross arms.

The utility model has the advantages that: when the power transmission line is subjected to pi connection transformation, only the 1-base tower is newly built, and compared with the traditional open-loop scheme, the 1-base tower is reduced, the engineering quantity of the tower and the foundation is reduced, a line corridor channel is saved, and the engineering investment is saved.

Drawings

FIG. 1 is a schematic diagram of the structure of an open loop column;

FIG. 2 is a top view of the open loop tower;

FIG. 3 is a schematic view of a partial structure of an open-loop tower;

FIG. 4 is a schematic structural view of the cross arm body;

FIG. 5 is a schematic structural view of the cross arm body;

FIG. 6 is a schematic of a pi-junction transformation scheme using an open loop column;

fig. 7 is a schematic diagram of a prior art pi junction transformation scheme.

Detailed Description

Referring to fig. 1 to 7, the present invention will be further described with reference to the following embodiments.

The utility model relates to a transmission line shaft tower field, especially an open loop tower, including shaft tower body 1, its characterized in that: be provided with ground wire cross arm 2, first wire cross arm 3, second wire cross arm 4 and third wire cross arm 5 along 1 top-down of shaft tower body, ground wire cross arm 1, first wire cross arm 2, second wire cross arm 3 and third wire cross arm 4 all be "Y" shape and arrange.

By adopting the design scheme, the single-side open loop of the line is realized only by newly building the 1-base tower, and compared with the traditional open loop scheme, the single-side open loop of the line reduces the 1-base tower, reduces the engineering quantity of the tower and the foundation, saves the line corridor channel and saves the engineering investment.

And the ground wire cross arm 1, the first wire cross arm 2, the second wire cross arm 3 and the third wire cross arm 4 are respectively composed of three cross arm bodies 7 which are arranged in a Y shape by taking the tower body 1 as a circle center, and the cross arm bodies 7 are connected with the tower body 1 through two connecting pieces.

The cross arm body 7 is connected with the tower body 1 through two connecting pieces, and the structure is stable.

The further technical scheme can be that the two connecting pieces are a pair of reinforcing plates 6 which are arranged in parallel, one end of each reinforcing plate 6 is connected with the tower body 1, the other end of each reinforcing plate extends out of the tower body 1, a series of corresponding mounting hole positions are arranged on the inner side of each reinforcing plate 6 and the two sides of the cross arm body 7, and bolts penetrate through the mounting hole positions to connect the reinforcing plates 6 with the cross arm body 7.

The inner sides of the stiffened plates 6 and the two sides of the cross arm body 7 are provided with a series of corresponding mounting hole positions, when in mounting, the mounting hole positions on the two sides of the cross arm body 7 are aligned with the mounting hole positions on the inner sides of the two stiffened plates 6, and bolts pass through the mounting hole positions and connect the mounting hole positions.

And the end of the cross arm body 7 extending outwards is provided with a tension string wire hanging plate 8 and a jumper wire string wire hanging plate 9.

And the strain insulator string wire hanging plate 8 and the jumper string wire hanging plate 9 are used for hanging hardware fittings.

The further technical scheme is that the transverse length of the second wire cross arm 3 is greater than the transverse lengths of the first and third

wire cross arms

2 and 4, and the transverse length of the ground wire cross arm 1 is less than the transverse lengths of the first and third

wire cross arms

2 and 4.

The transverse length of the second wire cross arm 3 is greater than the transverse lengths of the first and third

wire cross arms

2 and 4, the transverse length of the ground wire cross arm 1 is less than the transverse lengths of the first and third

wire cross arms

2 and 4, and the protection angle tan of the ground wire to the wire can be met^-1The horizontal distance/vertical distance between the ground wires is not more than 10 degrees (110 kV line), the insufficient distance between the upper and lower wires caused by ice-shedding jump is prevented, meanwhile, the minimum horizontal offset distance between the adjacent wires of the upper and lower layers of the 10mm ice-coated area or between the ground wire and the adjacent wire can be met, the 110kV line is not less than 0.5 meter, and the 220kV line is not less than 1.0 meter.

Example one

As shown in fig. 6, the a-substation-side conductor and the D-substation-side conductor are jumped to form a 110kVDA line, the C-substation-side conductor and the D-substation-side conductor are jumped to form a 110kVDC line, and the a-substation-side conductor and the B-substation-side conductor are jumped to restore the 110kVAB line. Realizing 110kVAC line single-side open loop.

The utility model has applied for invention patent on the same subject at the same day.

Claims

1. The utility model provides an open loop tower, includes shaft tower body, its characterized in that: be provided with ground wire cross arm, first wire cross arm, second wire cross arm and third wire cross arm along shaft tower body top-down, ground wire cross arm, first wire cross arm, second wire cross arm and third wire cross arm all be "Y" shape and arrange.

2. An open loop tower according to claim 1, wherein: the ground wire cross arm, the first wire cross arm, the second wire cross arm and the third wire cross arm are all composed of three cross arm bodies which are arranged in a Y shape by taking the tower body as a circle center, and the cross arm bodies are connected with the tower body through two connecting pieces.

3. An open loop tower according to claim 2, wherein: the two connecting pieces are a pair of reinforcing plates which are arranged in parallel, one end of each reinforcing plate is connected with the tower body, the other end of each reinforcing plate extends out of the tower body, a series of corresponding mounting hole positions are arranged on the inner side of each reinforcing plate and the two sides of the cross arm body, and bolts penetrate through the mounting hole positions to connect the reinforcing plates with the cross arm body.

4. An open loop tower according to claim 2, wherein: one end of the cross arm body extending outwards is provided with a tension string wire hanging plate and a jumper wire string wire hanging plate.

5. An open loop tower according to claim 1, wherein: the transverse length of the second wire cross arm is greater than that of the first and third wire cross arms, and the transverse length of the ground wire cross arm is less than that of the first and third wire cross arms.