CN105976948B - Anti- bird type parallel connection gaps and its installation method - Google Patents

Abstract

The invention discloses a kind of anti-bird type parallel connection gaps and its installation methods, including top electrode (1), lower electrode (2) and insulator chain (3), the top electrode (1) directly cover is connected on the first insulator bowl head of the insulator chain (3), and the lower electrode (2) is fixedly mounted on using connection bolt on the conductor wire end gold utensil of the insulator chain (3).Adjustment top electrode makes discharging terminals and the discharging terminals of lower electrode front end in the same plane clockwise or counterclockwise as needed.The present invention is a kind of overhead transmission line bird pest tripping probability can be greatly reduced, improve lightning stroke trip reclosing success rate but also save the anti-bird type parallel connection gaps of O＆M expense.Its installation method is simple and reliable, efficient and convenient.

Description

Anti-bird type parallel gap and its installation method

technical field

The invention relates to a parallel gap for electric power engineering, in particular to a bird-proof parallel gap. The invention also relates to a method for installing the bird-proof parallel gap.

Background technique

my country's overhead transmission lines are distributed in many areas, most of which are located in remote mountainous areas. The vegetation below the lines is lush, and birds are active in the line corridors. At the same time, in the spring and summer of each year, lightning activities are frequent in southern my country. Large birds eating or excreting above the insulator strings of transmission lines are very likely to cause insufficient insulation distance and cause line tripping and power outages; at the same time, lightning overvoltages can easily cause line insulation breakdown and cause power outages, and may even lead to unsuccessful reclosing. In order to prevent bird damage and tripping faults caused by lightning strikes on overhead transmission lines, operating units often install bird-proof devices, bird-proof baffles, lightning arresters, parallel gaps and other bird-proof and lightning-proof auxiliary facilities on the line, which have achieved certain results. Many ancillary facilities not only increase the workload of line operation and maintenance, but also cost a lot to install multiple facilities.

Contents of the invention

The first technical problem to be solved by the present invention is to provide a bird-proof parallel gap that can greatly reduce the probability of bird damage tripping of overhead transmission lines, improve the success rate of lightning tripping and reclosing, and save operation and maintenance costs.

The second technical problem to be solved by the present invention is to provide a method for installing the bird-proof parallel gap.

In order to solve the first technical problem, the bird-proof parallel gap provided by the present invention includes an upper electrode, a lower electrode and an insulator string, and the upper electrode is directly covered and connected to the first insulator bowl head of the insulator string , the lower electrode is fixedly installed on the wire end fittings of the insulator string by using connecting bolts.

The upper electrode is composed of a bowl-shaped cover, an umbrella surface, a pressure equalizing ring and a discharge terminal. The coaxial line of the bowl-shaped cover is fixedly connected to the central hole of the umbrella surface; the discharge terminal The pressure equalizing ring is embedded to form an annular pressure equalizing body, and the annular pressure equalizing body is fixedly connected to the edge of the umbrella shed through the coaxial line of the ring body.

The longitudinal outer edge of the pressure equalizing ring has the same radius of curvature as the longitudinal edge of the canopy shed, and the discharge terminal has the same diameter and longitudinal curvature radius as the cross section of the pressure equalizing ring.

The discharge terminal of the upper electrode is in the same plane as the discharge terminal at the front end of the lower electrode.

In order to solve the second technical problem, the present invention provides a bird-proof parallel gap installation method, the lower electrode is fixed and installed on the wire end fittings of the insulator string with connecting bolts, and the upper electrode 1 is directly covered and connected to the first piece of the insulator string Insulator bowl head, adjust the upper electrode clockwise or counterclockwise as needed so that the discharge terminal and the discharge terminal at the front end of the lower electrode are in the same plane.

The bird-proof parallel gap and its installation method using the above technical scheme can adjust the transverse diameter or longitudinal cover height of the upper electrode according to the actual situation of the suspension insulator of the transmission line, and the axial distance between the discharge terminal at the front end of the lower electrode and the insulator string and The vertical distance from the wire can also be adjusted according to the condition of the upper electrode. By installing the bird-proof parallel gap on the insulator string using the method provided by the present invention, it can block ice, snow, bird droppings, etc. to form discharge channels on the surface of the insulator string, and improve the efficiency of the insulator string. The anti-icing flash and anti-bird damage performance shortens the dry arc distance of the insulator string, which can effectively improve the success rate of reclosing for lightning tripping; it can be assembled on site, and it is convenient for transportation, on-site installation, and replacement.

The beneficial effects of the present invention are:

1), can greatly reduce the probability of tripping due to bird damage on overhead transmission lines;

2) It can delay the bridging time of the insulator string ice edge and reduce the probability of ice flash;

3) It can improve the success rate of lightning tripping and reclosing;

4), can save operation and maintenance costs.

To sum up, the present invention is a bird-proof parallel gap that can not only greatly reduce the probability of bird damage tripping on overhead transmission lines, improve the success rate of lightning tripping and reclosing, but also save operation and maintenance costs. The installation method is simple, reliable, fast and convenient.

Description of drawings

Fig. 1 is a structural front view of a specific embodiment of the present invention.

Fig. 2 is a structural top view of a specific embodiment of the present invention.

In the picture:

1—upper electrode;

11—bowl-shaped cover body;

12—umbrella surface;

13—pressure equalizing ring body;

14—discharge terminal;

2—lower electrode;

3—Insulator string.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing.

Referring to Figures 1 and 2, a bird-proof parallel gap and its installation method include an upper electrode 1, a lower electrode 2 and an insulator string 3. The upper electrode 1 consists of a bowl-shaped cover 11, an umbrella surface 12, and a pressure equalizing ring. 13 and discharge terminal 14, the diameter of the mouth of the bowl-shaped cover 11 matches the diameter of the central hole of the umbrella surface 12, and the bowl-shaped cover 11 is fixedly connected to the central hole of the umbrella surface 12 through the coaxial line of the mouth The outer edge of the pressure equalizing ring body 13 is longitudinally the same radius of curvature as the edge of the umbrella skirt of the umbrella surface 12, and the cross section of the discharge terminal 14 and the pressure equalizing ring body 13 has the same diameter and longitudinal curvature radius, and the discharge terminal 14 is embedded in the pressure equalizing ring body 13 and form an annular pressure equalizing body with it, and this annular pressure equalizing body is fixedly docked with the umbrella surface 12 umbrella skirt edges by its ring body coaxial line. The lower electrode 2 is made according to the requirements of the relevant standards, and the lower electrode 2 is fixedly installed on the wire terminal fittings of the insulator string 3 made of porcelain or glass by connecting bolts. The upper electrode 1 is directly covered and connected to the first piece of insulator bowl head of the insulator string 3 , and the upper electrode 1 is adjusted clockwise or counterclockwise as required so that the discharge terminal 14 and the discharge terminal at the front end of the lower electrode 2 are in the same plane.

Referring to Figure 1 and Figure 2, the bowl-shaped cover body 11 of the upper electrode 1 is bowl-shaped, cut and welded from 45# plate material, the outer diameter of the upper bottom surface is φ80mm, the lower bottom surface is the cover mouth diameter φ100mm, and the height is 80mm. The size of the insulator bowl head can be changed according to different specifications; the umbrella surface 12 is punched by 1mm thick 304 stainless steel plate, the diameter of the central hole is φ100mm, the diameter of the largest horizontal part is 1000m, and the height of the longitudinal cover is 300mm; the pressure equalizing ring body 13 is made of The aluminum tube with a thickness of 1.5mm and a diameter of 50mm is bent; the discharge terminal 14 is bent from a galvanized round steel with a diameter of 50mm, and the axial length of a single discharge terminal 14 is 150mm; the bowl-shaped cover 11 is coaxial through its cover mouth The wire is fixedly welded to the central hole of the umbrella surface 12, and the discharge terminal 14 is embedded in the equalizing ring body 13 and forms an annular equalizing body with it. The outer edge of the annular equalizing body is longitudinally the same radius of curvature as the edge of the umbrella skirt of the umbrella surface 12, The coaxial line of the ring body is fixedly welded to the edge of the shed of the umbrella surface 12, and the fixed and welded bowl-shaped cover body 11, umbrella surface 12, pressure equalizing ring body 13 and discharge terminal 14 form the upper electrode 1. The lower electrode 2 is a commercially available lower electrode 2 produced by Chongqing Xipeng Lightning Protection Co., Ltd. The insulator string 3 adopts the existing porcelain or glass insulator string of the line. The lower electrode 2 is fixed and installed on the wire end fittings of the insulator string 3 with connecting bolts; the upper electrode 1 is directly covered and connected to the first insulator bowl head of the insulator string 3, and the upper electrode 1 is adjusted clockwise or counterclockwise as required to discharge The terminal 14 is installed in the same plane as the discharge terminal at the front end of the lower electrode 2 .

A kind of anti-bird type parallel gap of the above structure and its installation method have been tested and proved to be effective, safe and reliable, and fully meet the design requirements.

Claims (3)

1. a kind of anti-bird type parallel connection gaps, including top electrode (1), lower electrode (2) and insulator chain (3), the top electrode (1) Directly cover is connected on the first insulator bowl head of the insulator chain (3), and the lower electrode (2) is consolidated using connection bolt Dingan County is mounted on the conductor wire end gold utensil of the insulator chain (3), it is characterized in that：The top electrode (1) is by bowl-type cover body (11), umbrella cover (12), grading ring body (13) and discharging terminals (14) composition, bowl-type cover body (11) coaxial line with it is described The centre bore of umbrella cover (12) fixes docking；The embedded grading ring body (13) of the discharging terminals (14) simultaneously forms ring with it Shape grading body, the annular grading body are docked by its ring body coaxial line with umbrella cover (12) full skirt edge fixation, institute The bowl-type cover body (11) for the top electrode (1) stated is in bowl-type, and materials 45# planks, which are tailored, to be welded, upper bottom surface outer diameter φ 80mm, Bottom surface, that is, cover mouth bore φ 100mm, high 80mm, each portion's size change according to different size insulator bowl area of bed；Described Umbrella cover (12) is using the thick 304 stainless steel plate punching of 1mm, and center Circularhole diameter is φ 100mm, and lateral maximum is a diameter of 1000m, it is 300mm longitudinally to cover into height；The grading ring body (13) uses thickness as 1.5mm, the aluminum pipe of a diameter of 50mm It bends；The discharging terminals (14) are bent using the galvanized steel bar of a diameter of 50mm, single described discharging terminals (14) axis It is 150mm to length.

2. anti-bird type parallel connection gaps according to claim 1, it is characterized in that：The outer edge of the grading ring body (13) is indulged To with the same radius of curvature of umbrella cover (12) full skirt edge longitudinal, the discharging terminals (14) and grading ring body (13) are transversal The same diameter in face, the same radius of curvature in longitudinal direction.

3. anti-bird type parallel connection gaps according to claim 1, it is characterized in that：The electric discharge of the top electrode (1) The discharging terminals of terminal (14) and described lower electrode (2) front end are in the same plane.