CN210067594U

CN210067594U - Bird-proof cross arm for 220kV power transmission line double-loop suspension tower

Info

Publication number: CN210067594U
Application number: CN201920680161.8U
Authority: CN
Inventors: 吴汉江; 毛峰; 严波; 潘朝阳; 周晨; 张天忠; 张金锋; 汪长河; 甘先苗; 孟宪乔; 黄健; 单德森; 钱程; 张树林; 余斌; 齐继富; 张洪亮
Original assignee: State Grid Corp of China SGCC; Anqing Power Supply Co of State Grid Anhui Electric Power Co Ltd; China Energy Engineering Group Anhui Electric Power Design Institute Co Ltd
Current assignee: State Grid Corp of China SGCC; Anqing Power Supply Co of State Grid Anhui Electric Power Co Ltd; China Energy Engineering Group Anhui Electric Power Design Institute Co Ltd
Priority date: 2019-05-10
Filing date: 2019-05-10
Publication date: 2020-02-14
Anticipated expiration: 2029-05-10

Abstract

The utility model relates to a transmission line iron tower field, concretely relates to an anti-bird cross arm that is used for 220kV transmission line two return circuits tower that dangles, include between two more sections including the iron tower cross arm, iron tower cross arm upper/lower planar end department connects through the steel pipe, and the distance between the tip festival that steel pipe and lie in iron tower cross arm end department is 400 + 600mm at least, the steel pipe on the interval be provided with two more than string some boards. The distance between the steel pipe and the end sections is larger, the end parts of the cross arms are not provided with upper and lower inclined materials, the number of the frameworks is small, and a small space suitable for nesting of birds is not provided. The utility model discloses take the thinking of "keeping away", set out from shaft tower structural design source, need not the later stage and add and establish bird prevention facility. When the pole tower is designed, the cross arm adopts the bird-proof cross arm with the simplified end part, so that the working strength of later operation and maintenance of the line can be greatly reduced, the bird-proof expense is greatly reduced, the working quality is improved, and the great economic and social benefits are achieved.

Description

Bird-proof cross arm for 220kV power transmission line double-loop suspension tower

Technical Field

The utility model relates to a transmission line iron tower field, concretely relates to be used for 220kV transmission line two return circuits tower of dangling to prevent bird cross arm.

Background

Bird damage of an overhead transmission line is a potential safety hazard for safe and stable operation of a power grid, and related statistical data show that except for lightning damage and external force damage, transmission line faults caused by bird activities are the most. The main reasons for the failure caused by bird activity in the corridor of the high-voltage transmission line are bird dung flashover (including pollution flashover caused by bird dung on the surface of an insulator and discharge channel formed by bird dung falling), bird nesting material flashover, bird body touch flashover, bird pecking composite insulator and the like. Especially in the region of wide and sparse population, the artificial interference and the destruction factor are few, which is beneficial to the foraging, nesting and reproduction and growth of part of large birds, and the large birds with the wingspan exceeding 3m are usually moved in the corridor region of part of the power transmission line. With the continuous development of power grid construction and the gradual improvement of natural environment, power grid faults caused by bird activities in a power transmission line corridor area tend to increase year by year and become one of the main reasons of faults of overhead power transmission lines. Therefore, the research of mastering the characteristics of bird activities and the research of the defects of the existing bird prevention device, and the research and the selection of the bird damage prevention device suitable for the characteristics of the overhead transmission line have important significance for ensuring the safe and stable operation of the power grid. Especially, as shown in fig. 1, because of the large number of frames, birds like to nest in a small space at the end (such as the joint of an inclined material at the end and double-spliced angle steel, a gap between the double-spliced angle steel, and the like), and the angle steel limbs face upwards, the birds can also stand for a long time.

At present, the main idea of the bird prevention device commonly used for the power transmission line is that from the angles of blocking and expelling, the bird prevention device has the characteristics and also has the defects, and most bird prevention devices are additionally installed at the later stage of an operation department, so that the operation workload and the cost are increased.

Disclosure of Invention

The utility model aims at providing a low cost and can effectively prevent bird for a long time the anti-bird cross arm that is used for 220kV transmission line two return circuits tower that dangles.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides an anti-bird cross arm for 220kV transmission line double circuit tower that dangles, includes that the iron tower cross arm includes more than two internodes, and the end department on iron tower cross arm upper/lower plane connects through the steel pipe, and the distance between the steel pipe and the tip internode that is located iron tower cross arm end department is 400 and becomes 600mm at least, the steel pipe on the interval be provided with more than two string point boards.

Due to the adoption of the technical scheme, the distance between the steel pipe and the end sections is larger, the end parts of the cross arms are not provided with upper and lower inclined materials, the number of the frameworks is small, and a small space suitable for nesting of birds is not provided. The utility model discloses take the thinking of "keeping away", set out from shaft tower structural design source, need not the later stage and add and establish bird prevention facility. When the pole tower is designed, the cross arm adopts the bird-proof cross arm with the simplified end part, so that the working strength of later operation and maintenance of the line can be greatly reduced, the bird-proof expense is greatly reduced, the working quality is improved, and the great economic and social benefits are achieved.

Drawings

FIG. 1 is a schematic diagram of a cross arm in the prior art;

fig. 2 is a schematic structural diagram of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a cross-sectional view A-A of the alternate embodiment of FIG. 2;

fig. 5 is a schematic structural diagram of another embodiment of the present invention.

Detailed Description

As shown in fig. 2 or 5, the anti-bird cross arm for the double-loop suspension tower of the 220kV transmission line comprises an iron tower cross arm 10, wherein the iron tower cross arm comprises more than two sections, the ends of the upper/lower planes of the iron tower cross arm 10 are connected through steel pipes 11, the distance between the steel pipes 11 and the end sections 12 at the ends of the iron tower cross arm 10 is at least 400-600mm, and the steel pipes 11 are provided with more than two hanging point plates 111 at intervals. That is to say, the minimum distance between the steel pipe 11 and the end internode 12 at the end of the cross arm 10 of the iron tower is 400-600 mm.

The distance between the steel pipe 11 and the end part internode 12 is larger, the end part of the cross arm has no inclined material on the upper surface and the lower surface of the last internode of the traditional cross arm, the framework is few, and a small space suitable for nesting of birds is not available, so that nesting of birds can be effectively prevented. The utility model discloses take the thinking of "keeping away", set out from shaft tower structural design source, need not the later stage and add and establish bird prevention facility. When the pole tower is designed, the cross arm adopts the bird-proof cross arm with the simplified end part, so that the working strength of later operation and maintenance of the line can be greatly reduced, the bird-proof expense is greatly reduced, the working quality is improved, and the great economic and social benefits are achieved.

As shown in fig. 4, the steel pipe 11 is a semicircular steel pipe, and the semicircular surface is located above, and the hanging point plate 111 is located below. The steel pipe 11 has smooth surface and great nesting difficulty, is not suitable for nesting of birds, and even if nesting is carried out, the nesting is difficult to keep for a long time. Therefore, the double-spliced angle steel used by the traditional cross arm by using the round pipe 11 can further reduce the nesting probability of birds, and the problem is fundamentally solved.

As shown in fig. 5, a diagonally arranged cable 13 is provided between the steel pipe 11 and the end internode 12, and two planes of the end internode 12 are opposite to the inclined direction of the cable 13 between the steel pipe 11.

The explanation is made in detail that the cable 13 between the plane of one side of the end internode 12 and the steel pipe 11 is inclined in the opposite direction to the cable 13 between the plane of the other side of the end internode 12 and the steel pipe 11. Because the guy cable is used as a component which can only bear tension, in order to transmit the external force of the lead wire acting on the wire hanging steel pipe in all directions to the tower body through the cross arm, the guy cable on the upper plane and the lower plane of the cross arm is in a reverse mode. The advantage that the cable is connected lies in very little with the connecting plate of end steel pipe, avoids appearing the complicated node structure that birds are easy to nest, and does not influence the biography power function of cross arm.

The distance between the steel pipe 11 and the end internode 12 is 500 mm. Compared with the advantages and disadvantages of various tangent tower cross arm structure arrangement types, the best effect is obtained when the distance between the steel pipe 11 and the end part internode 12 is 500mm through analyzing the stress characteristic of the structure, the comprehensive consideration of the human space under the operation and maintenance and the comprehensive consideration of the human space under the operation and maintenance.

As shown in fig. 3 or 4, the hanging point plate 111 is welded on the steel pipe 11. The connection between the wire hanging plate and the wire hanging rod piece is more reliable, the wire hanging plate is arranged on the steel pipe at intervals, and the conducting wires are hung on the wire hanging plate on the steel pipe through the insulator strings and the hardware fittings. The distance between the steel pipe and the oblique material section located at the end part of the iron tower cross arm is 400-plus 600mm, the upper plane and the lower plane of the cross arm are directly connected to the hanging point steel pipe without oblique materials, so that the frameworks at the hanging point of the wire cross arm are few, a small space suitable for nesting of birds is not available, the circular surface of the hanging line steel pipe enables the birds to stop above the circular surface, and the risk that insulator strings under the hanging line steel pipe are discharged by bird nest falling objects and droppings of roosters is effectively avoided.

The steel pipe 11 and the iron tower cross arm 10 are connected through a splicing connecting plate 14. The structure of the joint is simplified, force transmission is clear, the size of the connecting plate is reduced, and the installation is convenient.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an anti-bird cross arm for 220kV transmission line double circuit tower that dangles, includes iron tower cross arm (10) and includes the internode more than two, its characterized in that: the end heads of the upper/lower planes of the iron tower cross arm (10) are connected through steel pipes (11), the distance between the steel pipes (11) and end internodes (12) positioned at the end heads of the iron tower cross arm (10) is at least 400-600mm, and more than two hanging point plates (111) are arranged on the steel pipes (11) at intervals.

2. The anti-bird cross arm for the double-circuit overhang tower for the 220kV power transmission line of claim 1, wherein: the steel pipe (11) is a semicircular steel pipe, the semicircular surface of the steel pipe is positioned above the steel pipe, and the hanging point plate (111) is positioned below the steel pipe.

3. The anti-bird cross arm for the double-circuit overhang tower for the 220kV power transmission line of claim 2, wherein: an obliquely arranged inhaul cable (13) is arranged between the steel pipe (11) and the end part internode (12), and the two planes of the end part internode (12) are opposite to the inclined direction of the inhaul cable (13) between the steel pipe (11).

4. The anti-bird cross arm for the double-circuit overhang tower for the 220kV power transmission line of claim 3, wherein: the distance between the steel pipe (11) and the end internode (12) is 500 mm.

5. The anti-bird cross arm for the double-circuit overhang tower for the 220kV power transmission line of claim 4, wherein: the hanging point plate (111) is sleeved and welded on the steel pipe (11).

6. The anti-bird cross arm for the double-circuit overhang tower for the 220kV power transmission line of claim 5, wherein: the steel pipe (11) and the iron tower cross arm (10) are connected through a splicing connecting plate (14).