CN216110000U

CN216110000U - 220kV four-loop cable terminal tower

Info

Publication number: CN216110000U
Application number: CN202122089066.0U
Authority: CN
Inventors: 杨隆宇; 施芳; 周辰; 陈立国; 李升来; 董思兵
Original assignee: North China Power Engineering Co Ltd of China Power Engineering Consulting Group
Current assignee: North China Power Engineering Co Ltd of China Power Engineering Consulting Group
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-03-22
Anticipated expiration: 2031-08-31

Abstract

According to the 220kV four-loop cable terminal tower, 6 layers of wire cross arms are sequentially arranged on a tower body, a wire down-leading point is arranged on each wire cross arm from the fourth layer to the sixth layer, and the section of the tower body is circular; a first jumper cross arm is arranged at each wire cross arm of the first layer at an interval of 90 degrees, and each first jumper cross arm is provided with 1 first wire down-leading point; a second jumper cross arm is arranged at the position of each wire cross arm of the second layer at an interval of 60 degrees, and each second jumper cross arm is provided with 1 second wire down-leading point; a third wire jumping cross arm is arranged at the position of each wire cross arm of the third layer at an interval of 30 degrees, and each third wire jumping cross arm is provided with 1 third wire leading-down point; projection points of the wire leading-down point, the first wire leading-down point, the second wire leading-down point and the third wire leading-down point on the horizontal plane are uniformly distributed on the same circumference, and corresponding arc included angles between every two adjacent 2 projection points are all 30 degrees. The utility model reduces the occupied area and saves the cost.

Description

220kV four-loop cable terminal tower

Technical Field

The utility model belongs to the field of power transmission line engineering, and relates to a 220kV four-loop cable terminal tower.

Background

In recent years, with the continuous development of domestic economy, corresponding domestic power industry is also continuously advancing, and an urban power grid needs to be continuously expanded, so that a multi-loop power transmission line is frequently adopted at present.

And urban multi-loop power transmission lines generally adopt a construction mode of laying steel tube towers and overhead combined cables. The existing 220kV four-loop cable terminal tower mostly adopts a lattice type iron tower to meet load requirements due to high voltage level.

The section of the lattice type iron tower body is square. The wire hanging points of the multilayer cross arm are basically arranged in one plane, and it is difficult to maintain a sufficient insulation distance among the 12 down leads in space. Meanwhile, because the load is large, a cable outdoor terminal and a lightning arrester with large size need to be arranged to connect each phase of wire, the size of a cable platform for correspondingly placing the cable outdoor terminal and the lightning arrester is large, the width of a tower body range is large, the width of a line corridor is large, the bottom of an iron tower is large in root opening, the occupied area is large, and the land acquisition cost is high. Moreover, the influence on the surrounding environment during foundation construction is also large.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a 220kV four-loop cable terminal tower.

The technical means adopted by the utility model are as follows.

A tower body of a 220kV four-loop cable terminal tower is sequentially provided with a ground wire support and 6 layers of wire cross arms from top to bottom, included angles between the first layer of wire cross arms, the second layer of wire cross arms, the third layer of wire cross arms and the fourth layer of wire cross arms are all 150 degrees, and projections of the first layer of wire cross arms, the second layer of wire cross arms and the fourth layer of wire cross arms on a horizontal plane are overlapped; the included angle between the cross arms of the fifth layer of wires is 90 degrees, the included angle between the cross arms of the sixth layer of wires is 30 degrees, the projections of the cross arms of the fourth to sixth layers of wires on the horizontal plane are not overlapped, the included angles between the projections of the cross arms of the adjacent wires are 30 degrees, the end part of each cross arm of the fourth to sixth layers of wires is provided with a wire leading-down point, and the section of the tower body is circular; a first jumper cross arm is arranged at each wire cross arm of the first layer at an interval of 90 degrees, and the end part of each first jumper cross arm is provided with 1 first wire down-leading point; a second jumper cross arm is arranged at the position of each wire cross arm of the second layer at an interval of 60 degrees, and the end part of each second jumper cross arm is provided with 1 second wire down-leading point; a third jumper cross arm is arranged at the position of each wire cross arm of the third layer at an interval of 30 degrees, and 1 third wire down-leading point is arranged at the end part of each third jumper cross arm; projection points of the wire leading-down point, the first wire leading-down point, the second wire leading-down point and the third wire leading-down point on the horizontal plane are uniformly distributed on the same circumference, and corresponding arc included angles between every two adjacent 2 projection points are all 30 degrees.

2 first jumper sub-cross arms are uniformly arranged between each wire cross arm of the first layer and the adjacent first jumper cross arm of the first layer, and the number of the first jumper sub-cross arms is 4; and 1 second jumper sub-cross arm is arranged on an included angle bisector of each wire cross arm of the second layer and the adjacent second jumper cross arms of the second layer, and the number of the second jumper sub-cross arms is 2.

The first layer of wire cross arm, the first jumper wire cross arm and the first jumper wire sub-cross arm are located on the same horizontal plane, the second layer of wire cross arm, the second jumper wire cross arm and the second jumper wire sub-cross arm are located on the same horizontal plane, and the third layer of wire cross arm and the third jumper wire cross arm are located on the same horizontal plane.

Still contain the cable platform, this cable platform is located sixth layer wire cross arm below.

The beneficial effects produced by the utility model are as follows.

(1) The utility model also arranges jumper cross arms at the same time of arranging the first to third layers of wire cross arms, and arranges the wire cross arms at the fourth to sixth layers of wires, so that each phase of wire can be vertically led down from the most appropriate position, thereby meeting the insulation requirement.

(2) The projection points of the down-leading points of the leads on the horizontal plane are uniformly distributed on the same circumference, so that the size required by a cable platform at the lower part of the tower body is reduced, and the cost is saved.

(3) The tower body of the utility model has small volume, and the diameter is smaller than that of a lattice type iron lap under the same external load, thereby reducing the width of a line corridor, reducing the occupied area and saving the land acquisition cost.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a projection view of the down-lead point of the lead of the present invention on a horizontal plane.

Detailed Description

As shown in fig. 1, the tower body 1 of the 220kV four-circuit cable termination tower of the present invention has a circular cross-section. The upper part of the tower body 1 is provided with a ground wire bracket 5, 6 layers of wire cross arms are sequentially arranged below the ground wire bracket along the tower body, a cable platform (not shown) is arranged below the sixth layer of wire cross arm, and a cable terminal and a lightning rod (not shown) are arranged on the cable platform. Every layer of wire cross arm all contains 2 wire cross arms, and the contained angle between 1A of first layer wire cross arm is 150, and the contained angle between 2A of second layer wire cross arm is 150, and the contained angle between 3A of third layer wire cross arm is 150, and the contained angle between 4A of fourth layer wire cross arm is 150, and the contained angle between 5A of fifth layer wire cross arm is 90, and the contained angle between 6A of sixth layer wire cross arm is 30. The projections of the first to fourth layers of wire cross arms on the horizontal plane are overlapped, the projections of the fourth to sixth layers of wire cross arms on the horizontal plane are not overlapped, and the included angles between the projections of the adjacent wire cross arms are all 30 degrees.

Every wire cross arm 1A of first layer is respectively set up a first wire jumper cross arm 11 at the 90 department of interval, evenly set up 2 first wire jumper sub-cross arms 111 between every wire cross arm 1A of first layer and its adjacent first wire jumper cross arm 11, this first wire jumper sub-cross arm 111's quantity is 4. And 2 wire cross arms 1A, 2 first jumper cross arms 11 and 4 first jumper sub cross arms 111 of the first layer are positioned on the same horizontal plane. Each end of the first jumper cross arm 11 is provided with 1 first wire down-leading point 41.

And a second jumper cross arm 12 is arranged at the position of each second layer of each wire cross arm 2A at an interval of 60 degrees, 1 second jumper sub cross arm 121 is arranged on the included angle bisector of each second layer of each wire cross arm 2A and the adjacent second jumper cross arm 12, and the number of the second jumper sub cross arms 121 is 2. 2 wire cross arms 2A, 2 second jumper cross arms 12 and 2 second jumper sub cross arms 121 on the second layer are positioned on the same horizontal plane. Each end of the second jumper cross arm 12 is provided with 1 second wire leading-down point 42.

And a third jumper cross arm 13 is arranged at the position of each wire cross arm 3A of the third layer at an interval of 30 degrees, and the third layer of wire cross arm 2A and the third jumper cross arm 13 are positioned on the same horizontal plane. Each end of the third jumper cross arm 13 is provided with 1 third wire leading-down point 43.

A fourth wire down-lead point 44 is provided at the end of each wire cross arm 4A of the fourth layer. A fifth wire down-lead point 45 is arranged at the end of each wire cross arm 5A of the fifth layer. A sixth wire down-lead point 46 is provided at the end of each wire cross arm 6A of the sixth layer.

As shown in fig. 2, projection points of the 2 first lead-down points 41, the 2 second lead-down points 42, the 2 third lead-down points 43, the 2 fourth lead-down points 44, the 2 fifth lead-down points 45, and the 2 sixth lead-down points 46 on a horizontal plane are uniformly distributed on the same circumference, and corresponding arc included angles between the adjacent 2 projection points are all 30 °.

Each phase of conductor of the first layer is respectively connected with the hanging points at the end parts of 2 conductor cross arms 1A on the first layer, then sequentially passes through 2 first jumper sub cross arms 111 and 1 first jumper cross arm 11 adjacent to the conductor cross arm 1A of the first layer, is vertically led down at a first conductor down-leading point 41 of the first jumper cross arm 11, and is then connected with a cable terminal and a lightning rod on a cable platform. Each phase of wire on the second layer is respectively connected with the hanging points at the end parts of 2 wire cross arms 2A on the second layer, then sequentially passes through 1 second jumper sub-cross arm 121 and 1 second jumper cross arm 12 adjacent to the wire cross arm 2A, is vertically led down at a second wire leading-down point 42 of the second jumper cross arm 12, and is then connected with a cable terminal and a lightning rod on a cable platform. Each phase of conductor of the third layer is respectively connected with the hanging points at the end parts of 2 conductor cross arms 3A on the third layer, then sequentially passes through 1 third jumper cross arm 13 adjacent to the conductor cross arm 3A, is vertically led down at a third conductor down-leading point 43 of the third jumper cross arm 13, and is then connected with a cable terminal and a lightning rod on a cable platform. And each phase of lead wires on the fourth layer to the sixth layer are respectively and vertically led down at the lead down point on the corresponding lead cross arm and then are connected with the cable terminal and the lightning rod on the cable platform.

Projection points of each lead down point on the horizontal plane are uniformly distributed on the same circumference, and corresponding arc included angles among 2 adjacent projection points are all 30 degrees, so that the size required by the cable platform is reduced while the insulation requirement is met, and the cost is saved.

Claims

1. A tower body (1) is sequentially provided with a ground wire support (5) and 6 layers of wire cross arms from top to bottom, included angles between every two layers of wire cross arms from the first layer to the fourth layer are all 150 degrees, and projections of the first layer to the fourth layer of wire cross arms on a horizontal plane are overlapped; the included angle between the fifth layer of wire cross arms (5A) is 90 degrees, the included angle between the sixth layer of wire cross arms (6A) is 30 degrees, the projections of the fourth to sixth layers of wire cross arms on the horizontal plane are not overlapped, the included angles between the projections of the adjacent wire cross arms are 30 degrees, the end part of each wire cross arm of the fourth to sixth layers is provided with a wire down-leading point, and the device is characterized in that,

the section of the tower body (1) is circular;

a first jumper cross arm (11) is arranged at each wire cross arm (1A) of the first layer at intervals of 90 degrees, and 1 first wire down-leading point (41) is arranged at the end part of each first jumper cross arm (11);

a second jumper cross arm (12) is arranged at the position of each wire cross arm (2A) of the second layer at an interval of 60 degrees, and the end part of each second jumper cross arm (12) is provided with 1 second wire down-leading point (42);

a third jumper cross arm (13) is arranged at the position of each wire cross arm (3A) of the third layer at an interval of 30 degrees, and the end part of each third jumper cross arm (13) is provided with 1 third wire down-leading point (43);

projection points of the wire leading-down point, the first wire leading-down point (41), the second wire leading-down point (42) and the third wire leading-down point (43) on a horizontal plane are uniformly distributed on the same circumference, and corresponding arc included angles among every two adjacent projection points are all 30 degrees.

2. The 220kV four-circuit cable termination tower according to claim 1, wherein 2 first jumper sub-cross-arms (111) are uniformly arranged between each wire cross-arm (1A) of the first layer and the adjacent first jumper cross-arm (11), and the number of the first jumper sub-cross-arms (111) is 4; each wire cross arm (2A) of the second layer and an included angle bisector of the adjacent second jumper cross arm (12) are provided with 1 second jumper sub-cross arm (121), and the number of the second jumper sub-cross arms (121) is 2.

3. The 220kV four-circuit cable termination tower of claim 2, wherein the first layer of wire cross-arm (1A), the first jumper cross-arm (11), and the first jumper cross-arm (111) are on the same horizontal plane, the second layer of wire cross-arm (2A), the second jumper cross-arm (12), and the second jumper cross-arm (121) are on the same horizontal plane, and the third layer of wire cross-arm (3A) and the third jumper cross-arm (13) are on the same horizontal plane.

4. The 220kV four-circuit cable terminal tower of claim 1, further comprising a cable platform disposed below the sixth layer of wire crossarm (6A).