CN203573767U - Metallic oxide lightning arrester - Google Patents
Metallic oxide lightning arrester Download PDFInfo
- Publication number
- CN203573767U CN203573767U CN201320791534.1U CN201320791534U CN203573767U CN 203573767 U CN203573767 U CN 203573767U CN 201320791534 U CN201320791534 U CN 201320791534U CN 203573767 U CN203573767 U CN 203573767U
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- stem
- resistor
- resistance
- cheese
- lightning arrester
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Abstract
The utility model discloses a metallic oxide lightning arrester, which comprises connecting flanges, a resistor stem and a porcelain bushing for external insulation, wherein the resistor stem is sleeved by the porcelain bushing; the connecting flanges are fixedly connected with two ends of the resistor stem and the porcelain bushing; the resistor stem comprises a plurality of insulating rods, a cake-shaped resistor block and electrodes at two ends; the cake-shaped resistor block is overlaid between the two electrodes at two ends, is wrapped and fixed by the insulating rods, and is formed by overlapping a plurality of cake-shaped resistor discs, and the resistor stem is wrapped by a silicone rubber wrapping layer without a gap. According to the metallic oxide lightning arrester, an arc-isolating cylinder is omitted, the poor sealing performance of porcelain bushing type lightning arresters is solved thoroughly, the voltage distribution effect is improved, the inner wall of porcelain is prevented from being burnt, so that explosion of the porcelain bushing is eliminated, and the performance of the lightning arrester is more reliable.
Description
Technical field
The utility model relates to a kind of lightning arrester, relates in particular to a kind of interchange 500kV system metal oxide lighning arrester with ceramic casing and no gap.
Background technology
As shown in Figure 1, existing metal oxide arrester comprises adpting flange 1, the insulator 7 that resistance stem stem and exterior insulation are used, resistor core column sleeve is connected in insulator, adpting flange is fixedly connected with the two ends of resistance stem stem and insulator, resistance stem stem comprises insulating rod 2, ring resistance sheet 3, the electrode at equalizing capacitor 4 and two ends, the electrode at two ends connects the two ends of insulating rod, in insulating rod, serial connection laminates a plurality of ring resistance sheets, in one end of insulating rod, be serially connected with for compressing the spring 5 of a plurality of ring resistance sheets, between the two ends of a plurality of ring resistance sheets, be connected with even capacitor, resistor core column sleeve is connected to arc cylinder 6.
The lightning arrester working voltage that interchange 500kV system is used is high, by zinc oxide resistance sheet closed assembly, along lightning arrester axial distribution, owing to there being the impact of electric capacity between stray capacitance and element over the ground, can make the voltage difference of bearing on every sheet resistor sheet, when the chargeability of resistor disc is too high, can cause resistor disc accelerated ageing, greatly shorten operation life of product, have influence on the normal operation of lightning arrester.
Therefore generally in the design of 500kV arrester without gaps, take some effectively all to press measure, the additional shading ring of all pressing wherein, internal resistance sheet post side parallel equalizing capacitor device group, capacitor is comprised of the capacitances in series of a plurality of 200-400pf, such complicated structure is high to the quality requirement of capacitor.During actual motion parallel equalizing capacitor device exist operation deteriorated, make moist, the problem such as electrical connection that installation and transportation vibration causes is bad, dielectric strength is low, quality accident occurs repeatedly.
In traditional design, the outer surface cover of resistor disc has arc cylinder, object is when the inner core body of lightning arrester is short-circuited, electric arc can calcination insulator inwall, prevents build-up of pressure release failure, insulator blast, but arc cylinder is epoxy fibreglass material, itself have strong moisture absorption, when having micro-moisture to enter insulator inside, meeting condensation is in arc cylinder and porcelain inner wall surface, and the dielectric strength of arc cylinder can decline rapidly, lightning arrester does not even break down when monitor has enough time to be reported to the police discovery.
Utility model content
For solving the problems of the technologies described above, the utility model has designed the gapless metal oxide arrester of porcelain overcoat for a kind of interchange 500kV system.
The utility model adopts following technical scheme:
A kind of metal oxide arrester, comprise adpting flange, the insulator that resistance stem stem and exterior insulation are used, resistor core column sleeve is connected in insulator, adpting flange is fixedly connected with the two ends of resistance stem stem and insulator, resistance stem stem comprises insulating rod, the electrode at cheese resistance bolck and two ends, between the electrode at two ends, laminated cheese resistance bolck, cheese resistance bolck is outer to be wrapped by a plurality of insulating rods, cheese resistance bolck is overrided to form by a plurality of cheese resistor discs, between the electrode of cheese resistance bolck and one end, be provided with for compressing the spring of a plurality of cheese resistor discs, the outer gapless of resistance stem stem is enclosed with one deck silicon rubber integument.This metal oxide arrester is cancelled arc cylinder, to after cheese resistor disc closed assembly, by six roots of sensation insulating rod, be fixed, put into again mould and wrap up high temperature silicon rubber, thoroughly stem stem is sealed, then the resistance stem stem of sealing is packed in insulator, so more thoroughly solved the sealing property of porcelain overcoat type lightning arrester, resistor-piece side short-circuit arc when lightning arrester breaks down, by silicon rubber, stopped, prevent calcination porcelain inwall, cause insulator blast, adopt cheese resistor disc, its body capacitance is larger, can play and improve the effect that voltage distributes, cancelled traditional parallel equalizing capacitor device, greatly simplified product structure, make lightning arrester more reliable performance.
As preferably, outside described cheese resistance bolck, by six roots of sensation insulating rod, wraps.
The beneficial effects of the utility model are: this metal oxide arrester is cancelled arc cylinder, more thoroughly solve the sealing property of porcelain overcoat type lightning arrester, improved the effect that voltage distributes, prevented calcination porcelain inwall, cause insulator blast, make lightning arrester more reliable performance.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of original Oxide Arrester;
Fig. 2 is a kind of structural representation of the present utility model;
In figure: 1, adpting flange, 2, insulating rod, 3, ring resistance sheet, 4, equalizing capacitor, 5, spring, 6, arc cylinder, 7, insulator, 8, adpting flange, 9, cheese resistor disc, 10, insulating rod, 11, silicon rubber integument, 12, insulator, 13, spring.
Embodiment
Below by specific embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is further described specifically:
Embodiment: as shown in Figure 2, a kind of metal oxide arrester, comprise adpting flange 8, the insulator 12 that resistance stem stem and exterior insulation are used, resistor core column sleeve is connected in insulator, adpting flange is fixedly connected with the two ends of resistance stem stem and insulator, resistance stem stem comprises insulating rod 10, the electrode at cheese resistance bolck and two ends, between the electrode at two ends, laminated cheese resistance bolck, cheese resistance bolck is outer to be wrapped by six roots of sensation insulating rod, cheese resistance bolck is overrided to form by a plurality of cheese resistor discs 9, the outer gapless of resistance stem stem is enclosed with one deck silicon rubber integument 11, between the electrode of cheese resistance bolck and one end, be provided with for compressing the spring 13 of a plurality of cheese resistor discs.
This metal oxide arrester is cancelled arc cylinder, to after cheese resistor disc closed assembly, by six roots of sensation insulating rod, be fixed, put into again mould and wrap up high temperature silicon rubber, thoroughly stem stem is sealed, then the resistance stem stem of sealing is packed in insulator, so more thoroughly solved the sealing property of porcelain overcoat type lightning arrester, resistor-piece side short-circuit arc when lightning arrester breaks down, by silicon rubber, stopped, prevent calcination porcelain inwall, cause insulator blast, adopt cheese resistor disc, its body capacitance is larger, can play and improve the effect that voltage distributes, cancelled traditional parallel equalizing capacitor device, greatly simplified product structure, make lightning arrester more reliable performance.
Above-described embodiment is a kind of preferably scheme of the present utility model, not the utility model is done to any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim records.
Claims (2)
1. a metal oxide arrester, comprise adpting flange, the insulator that resistance stem stem and exterior insulation are used, resistor core column sleeve is connected in insulator, adpting flange is fixedly connected with the two ends of resistance stem stem and insulator, it is characterized in that, described resistance stem stem comprises insulating rod, the electrode at cheese resistance bolck and two ends, between the electrode at two ends, laminated cheese resistance bolck, cheese resistance bolck is outer to be wrapped by many insulating rods, cheese resistance bolck is overrided to form by a plurality of cheese resistor discs, between the electrode of cheese resistance bolck and one end, be provided with for compressing the spring of a plurality of cheese resistor discs, the outer gapless of resistance stem stem is enclosed with one deck silicon rubber integument.
2. a kind of metal oxide arrester according to claim 1, is characterized in that, described cheese resistance bolck is outer to be wrapped by six insulating rods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320791534.1U CN203573767U (en) | 2013-12-05 | 2013-12-05 | Metallic oxide lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320791534.1U CN203573767U (en) | 2013-12-05 | 2013-12-05 | Metallic oxide lightning arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203573767U true CN203573767U (en) | 2014-04-30 |
Family
ID=50541485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320791534.1U Expired - Fee Related CN203573767U (en) | 2013-12-05 | 2013-12-05 | Metallic oxide lightning arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203573767U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110211755A (en) * | 2019-05-31 | 2019-09-06 | 国网湖南省电力有限公司 | Cage lightning arrester insulating cylinder and explosion-proof lightning arrester |
| CN111066105A (en) * | 2017-09-12 | 2020-04-24 | 西门子股份公司 | Overvoltage protector with vibration damper |
-
2013
- 2013-12-05 CN CN201320791534.1U patent/CN203573767U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111066105A (en) * | 2017-09-12 | 2020-04-24 | 西门子股份公司 | Overvoltage protector with vibration damper |
| CN110211755A (en) * | 2019-05-31 | 2019-09-06 | 国网湖南省电力有限公司 | Cage lightning arrester insulating cylinder and explosion-proof lightning arrester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140430 Termination date: 20151205 |
|
| EXPY | Termination of patent right or utility model |