CN100490026C - Metal oxide lightning arrester - Google Patents
Metal oxide lightning arrester Download PDFInfo
- Publication number
- CN100490026C CN100490026C CNB2005100427898A CN200510042789A CN100490026C CN 100490026 C CN100490026 C CN 100490026C CN B2005100427898 A CNB2005100427898 A CN B2005100427898A CN 200510042789 A CN200510042789 A CN 200510042789A CN 100490026 C CN100490026 C CN 100490026C
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- China
- Prior art keywords
- metal oxide
- insulating
- pressure release
- insulating cylinder
- arrester
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Abstract
The invention discloses a metal oxide arrester in the transmission power protective equipment technological domain, which comprises the following parts: several arrester units with insulating case and flannel; wherein the insulating case is two layers, whose inner layer is insulating cylinder of non-ceramic insulating material and outer layer is umbrella case of silicone rubber composite material; the pressure releasing hole is set on the insulating cylinder, which loads sealing part; the flannel and insulating cylinder connect through rubber.
Description
Affiliated technical field:
The present invention relates to power transmission and transformation protection equipment technical field, be specifically related to a kind of metal oxide arrester.
Background technology:
At present, what 500kV system electricity consumption site type metal oxide arrester mainly adopted both at home and abroad is the porcelain bushing type lightning arrester, the overall structure of porcelain bushing type lightning arrester is generally three joint series connection rising structures, and the inner core body structure is an open side type, and every joint lightning arrester unit comprises overcoat and core body etc.Described overcoat is the porcelain overcoat, is made up of insulator and flange, and the insulator material is a ceramic material.
Power station type polymeric metal oxide surge arrester only is used for the power station of 220kV and following grade, more the power station type polymeric metal oxide surge arrester of voltage levels is difficult to realize mainly due to mechanical performance, pressure release performance, goes back product-free at present and moves in the power station.
The problem that prior art is existed describes respectively below:
1) problem of porcelain coat lightning arrester existence is: a) volume is big, and weight is big; B) explosion-proof performance instability, the back harmfulness that lost efficacy is big: when the lightning arrester internal short-circuit, the internal gas pressure sudden change, powerful pressure was difficult to emit in moment, and the very easy porcelain wall that causes bursts, and inner core body part is ejected, the damage miscellaneous equipment, and accident is enlarged.
2) problem of polymeric metal oxide surge arrester existence: a) employing is threaded between the gold utensil of composite sheath and the insulating cylinder, and the mechanical strength of composite sheath is restricted, and can't be used for the lightning arrester of voltage levels; B) lightning arrester of voltage levels requires height to the pressure release performance, and prior art can't realize.
Summary of the invention:
The volume that the present invention will overcome the porcelain coat lightning arrester is big, weight is big, explosion-proof performance is unstable and the polymeric housed metal oxide arrester mechanical strength is little, the problem that the pressure release performance is low.
For overcoming the problem that prior art exists, solution of the present invention is: a kind of metal oxide arrester, comprise number joint lightning arrester unit, comprise insulating case and flange 1 on the lightning arrester unit, its special character is: described insulating case is two-layer, and internal layer is the insulating cylinder 5 of non-porcelain insulating material, and skin is the umbrella cover 2 of silicon rubber composite material, insulating cylinder 5 is provided with pressure release orifice 3, is equipped with seal 4 on pressure release orifice 3; Be connected with mucilage binding between described flange 1 and the insulating cylinder 5.
Above-mentioned pressure release orifice 3 is the outwards little horn mouth of imperial palace of footpath.The pressure release performance is better.
Above-mentioned pressure release orifice 3 is a groove shape mouth, and above-mentioned seal 4 is assemblied on the liberation port 3.Guaranteed the sealing property of lightning arrester.
Above-mentioned pressure release orifice 3 comprises two groups that are arranged on two sagittal planes, and every group is uniform four.When internal short-circuit, easilier inner moment is produced very high air pressure discharge, the pressure release performance is better.
Compared with prior art, advantage of the present invention is:
1, volume is little, and is in light weight: adopt the insulating cylinder of non-porcelain insulating material and the silicon rubber composite material umbrella cover overcoat as lightning arrester, volume reduces, and weight saving is than the easier assembling of porcelain coat lightning arrester, transportation and installation;
2, explosion-proof performance is good: the material advantage that makes full use of composite sheath, carrying out pressure with the way of opening on the coat discharges, when breaking down, sealing strip in the overcoat on the insulating cylinder is washed open under the air pressure inside effect, discharge the very high pressure that inner moment produces rapidly, overcoat just can not burst by pressurized like this, and inner core body part can not take place to spray and the damage miscellaneous equipment, and accident is enlarged.Experiment shows that big electric current pressure releasability of the present invention reaches 63kA, and this numerical value is the highest ranking of domestic test capability, little electric current pressure releasability 800A;
3, mechanical strength is good: adopt between conventional polymeric housed metal oxide arrester insulating cylinder and the upper and lower gold utensil to be threaded, cutting thread is wanted in the insulating cylinder termination, has destroyed the intensity of insulating cylinder.Among the present invention, adopt mucilage binding to connect between insulating cylinder and the flange, guaranteed the lightning arrester overall mechanical strength, its bending strength is up to 25.3kNm;
4, good seal performance: owing to be equipped with seal on insulating cylinder side pressure liberation port, both guaranteed the manufacturability of product, the more important thing is the sealing property that has guaranteed lightning arrester, test shows that the sealing leak rate of lightning arrester is less than 6.65 * 10
-8Pa.L/s, than the sealing leak rate of GB 11032-2000 " interchange gapless metal-oxide lighting arrester " national Specification less than 6.65 * 10
-5Pa.L/s is low three orders of magnitude;
5, the scope of application is wide: the present invention is applicable to 500kV power station type polymeric metal oxide surge arrester, also can be used for the architecture advances of other performance metal oxide arrester with a high standard.
Description of drawings:
Accompanying drawing is a structural representation of the present invention.
Embodiment:
Referring to accompanying drawing, the present invention includes number joint lightning arrester unit, every joint lightning arrester comprises overcoat and flange 1 on the unit.Said overcoat is two-layer, internal layer is the insulating cylinder 5 of non-porcelain insulating material, skin is the umbrella cover 2 of silicon rubber composite material, insulating cylinder 5 is provided with pressure release orifice 3, and on pressure release orifice 3, be equipped with seal 4, said pressure release orifice 3 is a groove shape mouth, and groove shape mouth is provided with vertically, and said groove shape bore is to being the little horn mouth of outer imperial palace.Said pressure release orifice 3 comprises two groups that are arranged on two sagittal planes, and every group is uniform four.Be connected with mucilage binding between said flange 1 and the insulating cylinder 5.
Claims (4)
1, a kind of metal oxide arrester, comprise number joint lightning arrester unit, comprise insulating case and flange (1) on the lightning arrester unit, it is characterized in that: described insulating case is two-layer, internal layer is the insulating cylinder (5) of non-porcelain insulating material, skin is the umbrella cover (2) of silicon rubber composite material, and insulating cylinder (5) is provided with pressure release orifice (3), is equipped with seal (4) on pressure release orifice (3); Be connected with mucilage binding between described flange (1) and the insulating cylinder (5).
2, a kind of metal oxide arrester as claimed in claim 1 is characterized in that: described pressure release orifice (3) is the outside little horn mouth of imperial palace in footpath.
3, a kind of metal oxide arrester as claimed in claim 1 or 2 is characterized in that: described pressure release orifice (3) is a groove shape mouth.
4, a kind of metal oxide arrester as claimed in claim 3 is characterized in that: described pressure release orifice (3) comprises two groups that are arranged on two sagittal planes, and every group is uniform four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100427898A CN100490026C (en) | 2005-06-09 | 2005-06-09 | Metal oxide lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100427898A CN100490026C (en) | 2005-06-09 | 2005-06-09 | Metal oxide lightning arrester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1877754A CN1877754A (en) | 2006-12-13 |
| CN100490026C true CN100490026C (en) | 2009-05-20 |
Family
ID=37510151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100427898A Expired - Fee Related CN100490026C (en) | 2005-06-09 | 2005-06-09 | Metal oxide lightning arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100490026C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105097153B (en) * | 2015-09-11 | 2018-04-13 | 南阳金冠电气有限公司 | A kind of compound arrester core group winding arrangement |
| CN106683810A (en) * | 2016-12-27 | 2017-05-17 | 中国西电电气股份有限公司 | Composite outer tube lightning arrester and preparation method thereof |
| CN108878084B (en) * | 2018-06-25 | 2023-10-31 | 国网湖南省电力有限公司 | Explosion-proof lightning arrester |
| CN110047634A (en) * | 2018-11-28 | 2019-07-23 | 劳伦斯电气有限公司 | A kind of zinc oxide explosion-proof lightning arrester |
-
2005
- 2005-06-09 CN CNB2005100427898A patent/CN100490026C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1877754A (en) | 2006-12-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090520 Termination date: 20170609 |
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| CF01 | Termination of patent right due to non-payment of annual fee |