CN206595098U - Combine disc type Multiple level arrester - Google Patents

Abstract

The utility model discloses a combined disc type multi-gap arrester, which relates to a direct-strike lightning arrester. A single disc type multi-gap arrester is: the outer edge of the glass insulator (1) is fixed with a composite insulating tape (3) to cover the multi-gap electrode (2), and the two ends of the multi-gap electrode (2) are respectively connected to the main gap The discharge ball (4) and the discharge ball (5) under the main gap; the multiple disc multi-gap arresters are: including the 1st, 2nd...N disc multi-gap arresters (10, 20... ...N0), N is a natural number, 1≤N≤6. The utility model has a low level of lightning strike protection and a large flow capacity, and can withstand direct lightning strikes; the unique high arc extinguishing ability protects the safety of the transmission line; the structure is simple, the volume is small, and the weight is light; the installation is convenient and maintenance-free during use; It can be used in harsh environments without fear of pollution.

Description

Combined disc multi-gap arrester

technical field

The utility model relates to a direct-strike lightning arrester, in particular to a combined disc type multi-gap arrester.

Background technique

Due to the dendritic network structure of the modern 6-35kV overhead distribution network, the distribution area is large, the probability of being struck by lightning is high, and the insulation level of the distribution network is low, so lightning accidents are most likely to occur.

According to statistics, lightning accidents in overhead distribution network with overhead radar are mainly due to flashing or explosion of insulators. Therefore, it is very necessary to use disc multi-gap arresters to prevent lightning damage to insulators.

Utility model content

The purpose of this utility model is to provide a combined disc-type multi-gap arrester, the lightning current of which is guided to the earth through the disc-type multi-gap arrester, so as to prevent the lightning current from flowing through the high-voltage overhead line insulator, and at the same time, multiple small gaps cooperate with the main gap, It can effectively extinguish the power frequency arc between the high voltage overhead line and the ground.

The purpose of this utility model is achieved in that:

1. Single disc multi-gap arrester

A single disc multi-gap arrester includes glass insulators, multi-gap electrodes, fixed composite insulation tapes, discharge balls above the main gap and discharge balls below the main gap;

The outer edge of the glass insulator includes multi-gap electrodes by fixing composite insulating tapes, and the two ends of the multi-gap electrodes are respectively connected with discharge balls on the main gap and lower discharge balls on the main gap.

2. Multiple disc multi-gap arresters

A plurality of disc multi-gap arresters are connected in series from top to bottom—first, second...N disc multi-gap arresters, N is a natural number, 1≤N≤6.

Working mechanism of the present utility model:

When the overhead high-voltage line is struck by lightning, a high voltage is generated at both ends of the insulator. When the high voltage is greater than the voltage protection level of the disc multi-gap arrester but lower than the discharge voltage of the insulator, the gap in the disc multi-gap arrester generates an ionized arc, forming a conductive arc. Through the loop, the lightning current is introduced into the ground.

The multi-gap and three main gaps composed of stainless steel beads can extinguish the power-frequency freewheeling arc between the overhead high-voltage line and the ground after the lightning current is introduced into the ground, ensuring the safety of power supply.

The utility model has the following advantages and positive effects:

① Low lightning protection level, large flow capacity, can withstand direct lightning strikes;

②Unique high arc extinguishing ability to protect the safety of transmission lines;

③Simple structure, small size and light weight;

④Easy installation and maintenance-free during use;

⑤ It can be operated and used in harsh environments without fear of pollution.

Description of drawings

Fig. 1 is a structural representation (single) of the utility model;

Fig. 2 is a schematic structural diagram of the utility model (multiple combinations).

In the picture:

1—glass insulator;

2—multi-gap electrode;

3—fixed composite insulating tape;

4—discharge ball on the main gap;

5—Discharge ball under the main gap;

10, 20...N0—the 1st, 2nd...N disc multi-gap arresters, N is a natural number, 1≤N≤6.

detailed description

Below in conjunction with accompanying drawing and embodiment describe in detail:

1. Single disc multi-gap arrester

1) overall

As shown in Figure 1, a single disc multi-gap arrester includes a glass insulator 1, a multi-gap electrode 2, a fixed composite insulating tape 3, an upper discharge ball 4 in the main gap and a lower discharge ball 5 in the main gap;

On the outer edge of the glass insulator 1, the multi-gap electrode 2 is covered by a fixed composite insulating tape 3, and the two ends of the multi-gap electrode 2 are respectively connected with the main gap upper discharge ball 4 and the main gap lower discharge ball 5.

2) Functional parts

(1) Glass insulator 1

Glass insulator 1 is a commonly used insulator for transmission lines.

(2) Multi-gap electrode 2

The multi-gap electrode 2 is linearly arranged with a number of spherical or cylindrical conductors at intervals of 0.5-2mm, and the conductors are processed from copper or steel;

The air gap between the electrode and the electrode constitutes a multi-gap system, which plays the role of conducting current and extinguishing arc.

(3) Fixed composite insulating tape 3

Made of silicone rubber, it is strip-shaped and wrapped outside the multi-gap electrode 2 to play the role of support and connection.

(4) Discharge ball 4 on the main gap, discharge ball 5 on the main gap

Consists of cylindrical conductors machined from copper or stainless steel;

Keep a gap of 40-60mm between them.

Play the role of conduction current and auxiliary arc extinguishing.

2. Multiple combined disc multi-gap arresters

As shown in Figure 2, multiple combined disc multi-gap arresters include sequentially connected in series from top to bottom—the first, 2...N disc multi-gap arresters 10, 20...N0, N is a natural number, 1≤N≤6 .

On the insulator of the high-voltage transmission line, the utility model is connected in parallel at both ends of the insulator, the upper main gap discharge ball and the transmission wire form the first main gap of 50mm; the lowermost main gap discharge ball and the insulator are installed with a cross bar (metal angle steel) The third main gap of 50mm is formed. The upper and lower main gap discharge balls of the middle unit are respectively connected to the two upper and lower installation units to form two discharge main gaps. The four main gaps and multiple stainless steel balls form a multi-gap electrode combination to form a protection gap.

When the transmission line and cable are attacked by lightning, a high voltage is generated between the transmission line cable and the installation crossbar, and the breakdown voltage protection level of the combined disc multi-gap arrester is lower than that of the insulator. The gap arrester breaks down first, and the air in the gap is ionized to form an arc short circuit, and the lightning current is discharged to the ground along this channel; Frequent flow disconnection

Instructions

1. According to the voltage level of the transmission line, combine 3 disc multi-gap arrester units into a 35kV combined multi-gap arrester (the working voltage of each disc multi-gap arrester unit is 15kV);

2. Rotate the combined lightning arrester on both ends of the insulator of the transmission line to form a parallel connection;

3. Optional disc-type multi-gap, adjust the width of the 4 main gaps to 50mm.

Claims (2)

1. a kind of single disc type Multiple level arrester, it is characterised in that：

Including glass insulator（1）, Multiple level electrode（2）, fixed compound inslation band（3）, ball discharge on main gap（4）And master Ball discharge under gap（5）；

In glass insulator（1）Outer pass through fixed compound inslation band（3）Cover Multiple level electrode（2）, in Multiple level electricity Pole（2）Two ends be connected to ball discharge on main gap（4）With ball discharge under main gap（5）.

2. multiple disc type Multiple level arresters based on arrester described in claim 1, it is characterised in that：

Including the be sequentially connected in series the 1st from top to bottom, 2 ... N disc type Multiple level arresters（10、20……N0）, N is nature Number, 1≤N≤6.