CN203312737U

CN203312737U - Multi-gap lightning arrester applied to high-voltage overhead lines

Info

Publication number: CN203312737U
Application number: CN2013204117227U
Authority: CN
Inventors: 刘旭; 吴求兵; 解子燕; 罗家明
Original assignee: WUHAN ARROW ADVANCED TECHNOLOGY CO LTD
Current assignee: Wuhan Ellen Phoenix Technology Co ltd
Priority date: 2013-07-11
Filing date: 2013-07-11
Publication date: 2013-11-27
Anticipated expiration: 2023-07-11

Abstract

The utility model discloses a multi-gap lightning arrester applied to high-voltage overhead lines, and relates to a high-voltage overhead line lightning arrester. The multi-gap lightning arrester comprises a long silicone rubber strip (10), metal electrodes (20) and connection terminals (30), two ends of the long silicone rubber strip (10) are respectively provided with the connection terminals (30), and the metal electrodes (20) are inserted in the long silicone rubber strip (10). The multi-gap lightning arrester has the advantages that the long silicone rubber strip of a pedestal layer is good in high/low temperature resistant performance, long-term operating temperature is -50-180 DEG C, and the long silicone rubber strip can be operated normally at a relatively low temperature; the high-voltage overhead power lines can be protected from induced overvoltage and direct lightning stroke without using shielded wires, and arc extinguishing characteristic is relatively good; and the multi-gap lightning arrester is simple in structure, low in cost and is efficient, and is applicable to straight lightning protection for overhead transmission lines with a 3-35kV voltage grade.

Description

A kind of many gaps lightning arrester that is applied to high-tension overhead line

Technical field

The utility model relates to a kind of high-tension overhead line lightning arrester, relates in particular to a kind of many gaps lightning arrester that is applied to high-tension overhead line.

Background technology

The lightning protection measures of high-tension overhead line is mainly by setting up lightning arrester.In order to reduce the lightning fault of transmission line, take now various integrated lightning protection measures, as set up lightning arrester, reduce pole tower ground resistance, improve the line insulation level, install auto recloser and set up coupling ground wire etc.But for the part circuit that is distributed in high soil resistivity, reduce the pole tower ground resistance difficulty larger, the countermeasure that the flashover fault caused for control thunderbolt wire has not still had.

In the power distribution circuit, lightning arrester commonly used has: valve-type arrester, tube type arrester and zinc oxide arrester etc.These lightning arresters can not bear direct stroke due to the restriction that is subject to through-current capability.

Summary of the invention

The purpose of this utility model just is to overcome the shortcoming and defect that prior art exists, and a kind of many gaps lightning arrester that is applied to high-tension overhead line is provided.

The purpose of this utility model is achieved in that

The utility model comprises long silicon rubber bar, metal electrode and splicing ear;

Two ends at long silicon rubber bar are respectively arranged with splicing ear;

In long silicon rubber bar, be inlaid with metal electrode.

Working mechanism of the present utility model:

When many gaps lightning arrester, after thunderbolt, puncture and produce a plurality of short arcs, these short arcs extend to the outer surface of long silicon rubber bar by aperture, thereby have elongated its arc length; The every a pair of gap in a plurality of gaps has produced cathode drop and anode drop simultaneously, forms higher electrode voltage after their stacks.Under elongating arc and higher electrode voltage effect, lightning current and power frequency continued flow are limited; Arc extinction and no longer restriking when power current zero passage subsequently, thus a direct lightning strike protection completed.

The utlity model has following advantages and good effect:

1. its high and low temperature resistance of long silicon rubber bar of the utility model pedestal layer is good, and the long-term work temperature is-50～180 ℃, can work under the lower temperature environment;

2. protect the high voltage overhead power circuit in the situation that do not use shielding conductor to avoid induction overvoltage and direct stroke, arc quenching characteristic is better;

3. simple in structure, with low cost and efficient, be applicable to the direct lightning strike protection of the overhead transmission line of 3～35kV electric pressure.

The accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

In figure:

10-long silicon rubber bar;

20-metal electrode,

The 21-the 1 electrode, the 22-the 2 electrode ... 2N-N electrode,

N is natural number, 20≤N≤30;

30-splicing ear,

The 31-the 1 splicing ear, the 32-the 2 splicing ear.

Embodiment

Below in conjunction with drawings and Examples, describe in detail:

One, the structure of many gaps lightning arrester

1, overall

As Fig. 1, the utility model comprises long silicon rubber bar 10, metal electrode 20 and splicing ear 30;

At the two ends of long silicon rubber bar 10, be respectively arranged with splicing ear 30;

In long silicon rubber bar 10, be inlaid with metal electrode 20.

2, assembly

1) long silicon rubber bar 10

Long silicon rubber bar 10 is a kind of strip insulating cylinders, is wrapped in metal electrode 20 outsides;

Rise and support and connection function.

2) metal electrode 20

Metal electrode 20 is by some and form by the spaced spherical or cylindrical conductor of 0.5～2mm;

That is: metal electrode 20 comprises the 1st electrode the 21, the 2nd electrode 22 ... with N electrode 2N,

N is natural number, 20≤N≤30;

Conductor is formed by tungsten copper, red copper or machining graphite;

Play a part by electric current.

3) splicing ear 30

Splicing ear 30 is a kind of metallic conductors, comprises the 1st splicing ear 31 and the 2nd splicing ear 32;

By brass or stainless steel, processed.

For the connection between overhead wire and ground lead.

Two, using method

The 1st splicing ear 31 is connected with bolt with protected overhead transmission line;

The 2nd splicing ear 32 is connected with bolt with ground lead.

Three, result of the test

1, through-current capability (8/20 μ s waveform): 50kA;

2, operating voltage: 35kV;

3, cutout ability (power frequency): 10kA.

Claims

1. many gaps lightning arrester that is applied to high-tension overhead line is characterized in that:

Comprise long silicon rubber bar (10), metal electrode (20) and splicing ear (30);

At the two ends of long silicon rubber bar (10), be respectively arranged with splicing ear (30);

In long silicon rubber bar (10), be inlaid with metal electrode (20).

2. by many gaps claimed in claim 1 lightning arrester, it is characterized in that:

Described long silicon rubber bar (10) is a kind of strip insulating cylinder, is wrapped in metal electrode (20) outside.

3. by many gaps claimed in claim 1 lightning arrester, it is characterized in that:

Described metal electrode (20) is by some and form by the spaced spherical or cylindrical conductor of 0.5～2mm.

4. by many gaps claimed in claim 1 lightning arrester, it is characterized in that:

Described splicing ear (30) is a kind of metallic conductor, comprises the 1st splicing ear (31) and the 2nd splicing ear (32).