CN210598363U

CN210598363U - 220kV and 66kV thoughtlessly press four return circuit tangent towers

Info

Publication number: CN210598363U
Application number: CN201921424972.8U
Authority: CN
Inventors: 包顺红; 白雨竹; 宋登科
Original assignee: Construction Branch Of State Grid Inner Mongolia Eastern Power Co ltd
Current assignee: Construction Branch Of State Grid Inner Mongolia Eastern Power Co ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-05-22
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses a four return circuit tangent towers are thoughtlessly pressed to 220kV and 66kV, belong to and transmission line shaft tower technical field, this four return circuit tangent towers are thoughtlessly pressed include the body of a tower, the body of a tower from the top down has arranged the ground wire support in proper order, 220kV wire cross arm and 66kV wire cross arm, the first wire cross arm of going up that 220kV wire cross arm includes, first well wire cross arm and first wire cross arm down, 66kV wire cross arm includes wire cross arm on the second, wire cross arm and second wire cross arm down in the second, be equipped with the ground wire on the ground wire support and hang the point, hang two root ground wires on the ground wire hanging point, 220kV wire cross arm hangs 220kV two return wires through the wire hanging point, 66kV wire cross arm hangs 66kV two return wires through the wire hanging point. The mixed-pressure four-loop tangent tower is low in manufacturing cost, compact in structure and high in space utilization rate, and can reduce occupation of a line corridor and investment in line construction.

Description

220kV and 66kV thoughtlessly press four return circuit tangent towers

Technical Field

The utility model belongs to the technical field of transmission line shaft tower technique and specifically relates to a four return circuit tangent towers are thoughtlessly pressed to 220kV and 66 kV.

Background

Along with the high-speed development of a power grid, land resources are more and more tense, a multi-loop tower-combined type mode is adopted for reducing land used by a line corridor, the method becomes a necessary trend for the construction of power transmission lines in China, particularly in economically developed or densely populated areas, a 220KV/66 KV high-voltage power transmission line is constructed in a crowded urban area, the difficulty of the line corridor problem is more and more large, the construction period of the power transmission line is delayed, particularly in densely populated areas, the proportion of the line corridor cost to the total cost is greatly increased, and the development of the power grid is severely restricted.

The document with publication number CN 202395404U relates to a mixed-voltage four-loop transmission line tangent tower, which comprises a tower leg, a tower body, a tower head and a V-shaped insulator string fixedly connected to the tower head, and is characterized in that the tower head consists of a 220kV double-loop tower head positioned at the upper part and a 110kV double-loop tower head positioned at the lower part; the 110kV double-circuit tower head is arranged according to two layers of cross arms and comprises a vertically arranged 110kV upper tower window, a 110kV lower tower window and phase lead cross arms transversely spanning two sides of each tower window, wherein the phase lead is positioned in the tower windows, three-phase leads connected with each layer of phase lead cross arms are horizontally arranged, the distance difference between the upper tower window and the lower tower window of the transmission line tangent tower is larger, and the corridor occupancy rate is larger.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at the not enough of prior art, provide a 220KV and 66KV thoughtlessly press four return circuit tangent towers, solve among the prior art technical problem that line corridor occupancy is big, line construction investment cost is big.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a 220kV and 66kV thoughtlessly press four return circuit tangent towers, includes the body of the tower, ground wire support, 220kV wire cross arm and 66kV wire cross arm have been arranged in proper order to the body of the tower from the top down, 220kV wire cross arm is including setting gradually from top to bottom first last wire cross arm, first well wire cross arm and first lower wire cross arm on the body of the tower, 66kV wire cross arm is including setting gradually from top to bottom wire cross arm, second well wire cross arm and second lower wire cross arm on the body of the tower, be equipped with the ground wire hanging point on the ground wire support, hang two ground wires on the ground wire hanging point, all be equipped with the wire hanging point on the wire cross arm, 220kV wire cross arm passes through the wire hanging point hangs two return conductors of 220kV, 66kV wire cross arm passes through the wire hanging point hangs two return conductors of 66 kV.

Furthermore, the 220kV two-circuit lead and the 66kV two-circuit lead are both steel-cored aluminum stranded wires, and the double ground wires are aluminum-clad steel stranded wires.

Furthermore, the wire hanging points of the first upper wire cross arm, the first middle wire cross arm and the first lower wire cross arm are arranged by adopting V-shaped insulator strings, and the wire hanging points of the second upper wire cross arm, the second middle wire cross arm and the second lower wire cross arm are arranged by adopting I-shaped insulator strings.

Furthermore, the tower body is made of hot-rolled angle steel, and the cross section of the tower body is a square cross section.

Further, the height of the V-shaped insulator string is larger than that of the I-shaped insulator string.

The utility model has the advantages that:

the utility model provides a four return circuit tangent towers are thoughtlessly pressed to 220KV and 66KV, the body of the tower from the top down has arranged ground wire support, 220kV wire cross arm and 66kV wire cross arm in proper order, this four return circuit tangent towers are thoughtlessly pressed to 220KV and 66KV low in cost, compact structure, space utilization is high, can reduce the occupation in circuit corridor, reduce the investment of line construction, adopt and thoughtlessly press four return circuit transmission of electricity, not only save the total investment of engineering, economic benefits is obvious, and social is showing, has wide application prospect in urbanization construction, can use widely.

Drawings

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

Detailed Description

The invention is further described with reference to the following figures and examples.

As shown in fig. 1, a 220kV and 66kV mixed-voltage four-loop tangent tower comprises a tower body 1, wherein a ground wire support 2, a 220kV wire cross arm and a 66kV wire cross arm are sequentially arranged on the tower body 1 from top to bottom, the ground wire support 2 is symmetrically arranged at the top of the tower body 1, comprises two branches and is respectively located at the left side and the right side of the tower body 1, a ground wire hanging point is arranged at the top of the ground wire support 2 and is used for hanging two ground wires, and the two ground wires play a role in protecting the suspended wires of the loop.

220kV wire cross arm is including setting gradually from top to bottom wire cross arm 3, first well wire cross arm 4 and first wire cross arm 5 on the body of the tower, 66kV wire cross arm is including setting gradually from top to bottom wire cross arm 8 under wire cross arm 6, the second in the second on the body of the tower 1 and the wire cross arm 7 under the second, and the bottom of above-mentioned wire cross arm all is equipped with wire hanging point, 220kV wire cross arm passes through wire hanging point hangs two return conductors of 220kV, 66kV wire cross arm passes through wire hanging point hangs two return conductors of 66 kV.

Wherein: the 220kV two-circuit lead is a JL/G1A-400/35 steel-cored aluminum stranded wire, each phase is provided with two wires, and the safety factor is 2.5; the 66kV two-loop lead is a JL/G1A-240/30 steel-cored aluminum stranded wire, each phase is two, and the safety coefficient is 2.5. The double ground wires are aluminum-clad steel stranded wires JLB40-150, and the safety factor is 3.5.

The corridor width of the 220KV and 66KV mixed-voltage four-loop tangent tower is controlled by a 220KV lead cross arm, in order to reduce the corridor width, lead hanging points of the first upper lead cross arm 3, the first middle lead cross arm 4 and the first lower lead cross arm 5 are arranged by adopting V-shaped insulator strings, and lead hanging points of the second upper lead cross arm 6, the second middle lead cross arm 7 and the second lower lead cross arm 8 are arranged by adopting I-shaped insulator strings.

The height of the V-shaped insulator string is larger than that of the I-shaped insulator string. The height of the V-shaped insulator string is 3585mm, and the height of the 66kV suspension string is 1800 mm.

The mixed-voltage four-loop tangent tower phase lead arrangement mode selects vertical arrangement, a 220kV two-loop lead is arranged above, the horizontal offset between a phase lead (V-shaped insulator string) and a ground wire is 1.0 meter, and the horizontal offset between the phase lead and the ground wire and the lower 66kV two-loop lead is more than or equal to 1.0 meter; the 66kV two-circuit lead is arranged below, and the horizontal offset between phase leads (I-shaped insulator strings) is 0.35 meter.

The iron tower is designed according to the erection of double ground wires, the protection angle of the ground wires on the iron tower to the leads is not more than zero degree, and the distance between the two ground wires is not more than 5 times of the vertical distance between the leads and the ground wires.

The tower body 1 is made of hot-rolled angle steel with the strength of Q235 and above, the minimum thickness of the angle steel is L40 multiplied by 3, and the specification of the angle steel with the size of L63 multiplied by 5 and above can be made of Q345. The tower components are connected through bolts, tower feet and local structures are welded, the bolts have specifications of M16, M20 (6.8 level), M24 and above (8.8 level), the section of the tower body 1 is a square section, and optimization of the section form of the tower body 1 is achieved.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a four return circuit tangent towers are thoughtlessly pressed to 220kV and 66kV which characterized in that: including the body of the tower, ground wire support, 220kV wire cross arm and 66kV wire cross arm have been arranged in proper order from the top down to the body of the tower, 220kV wire cross arm is including setting gradually from top to bottom first last wire cross arm, first well wire cross arm and first wire cross arm down on the body of the tower, 66kV wire cross arm is including setting gradually from top to bottom wire cross arm, second well wire cross arm and second wire cross arm down on the second on the body of the tower, be equipped with the ground wire on the ground wire support and hang two ground wires, all be equipped with the wire on the wire cross arm and hang the point, 220kV wire cross arm passes through wire hanging point hangs 220kV two return conductors, 66kV wire cross arm passes through wire hanging point hangs 66kV two return conductors.

2. The 220kV and 66kV mixed-voltage four-loop linear tower as claimed in claim 1, wherein: the 220kV two-circuit lead and the 66kV two-circuit lead are both steel-cored aluminum stranded wires, and the double ground wires are aluminum-clad steel stranded wires.

3. The 220kV and 66kV mixed-voltage four-loop linear tower as claimed in claim 1, wherein: the wire hanging points of the first upper wire cross arm, the first middle wire cross arm and the first lower wire cross arm are arranged by adopting V-shaped insulator strings, and the wire hanging points of the second upper wire cross arm, the second middle wire cross arm and the second lower wire cross arm are arranged by adopting I-shaped insulator strings.

4. The 220kV and 66kV mixed-voltage four-loop linear tower as claimed in claim 1, wherein: the tower body is made of hot-rolled angle steel, and the cross section of the tower body is a square cross section.

5. The 220kV and 66kV mixed-voltage four-loop linear tower as claimed in claim 3, wherein: the height of the V-shaped insulator string is larger than that of the I-shaped insulator string.