CN101826382B - DC toughened glass insulator - Google Patents
DC toughened glass insulator Download PDFInfo
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- CN101826382B CN101826382B CN2010101230360A CN201010123036A CN101826382B CN 101826382 B CN101826382 B CN 101826382B CN 2010101230360 A CN2010101230360 A CN 2010101230360A CN 201010123036 A CN201010123036 A CN 201010123036A CN 101826382 B CN101826382 B CN 101826382B
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- umbrella skirt
- toughened glass
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- full skirt
- glass insulator
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Abstract
The invention discloses a DC toughened glass insulator, which comprises an iron cap (2), a glass piece (8), a steel pin (4) and adhesive (4), wherein the glass piece (8) is provided with an outer umbrella skirt (11), a first inner umbrella skirt (10) and a second inner umbrella skirt (9), the glass piece (8) comprises the following main chemical compositions in percentage by weight: more than or equal to 18 percent of sodium oxide, more than or equal to 13.67 percent of potassium oxide, more than or equal to 6.1 percent of magnesium oxide, more than or equal to 2.06 percent of barium oxide, more than or equal to 2 percent of aluminum trioxide and rest silicon dioxide. The height ratio between the outer umbrella skirt (11) and the first inner umbrella skirt (10) and between the second inner umbrella skirt (9) and the outer umbrella skirt is less than or equal to 0.6, or the height ratio between the first inner umbrella skirt (10) and the outer umbrella skirt and between the first inner umbrella skirt (10) and the second inner umbrella skirt (9) is more than or equal to 1.5. The DC toughened glass insulator can effectively prevent the ionic migration in the glass piece, reduces the concentration of main charge carriers in the glass piece, hinders the displacement of ions which are easy to migrate in an irregular network inside the glass piece, reduces the migration charge quantity in the glass piece, improves the volume resistance of the toughened glass insulator, reduces the aging speed of the toughened glass insulator, and improves the flashover voltage and the breakdown voltage of the toughened glass insulator under the serious contamination.
Description
Technical field
The present invention relates to toughened glass insulator, especially relate to superhigh pressure, big capacity and remote direct current transportation toughened glass insulator.
Background technology
Along with the continuous development of science and technology, has the trend that superhigh pressure, big capacity, direct current transportation remote and the little characteristics of line loss have become electric power industry development.At high pressure, in the superhigh pressure ac transmission, the existing dish type suspension type toughened glass steel insulator of producing has obtained using widely, but this dish type suspension type toughened glass steel insulator can not directly should be in super high voltage direct current electricity transmission, this is because dish type suspension type toughened glass steel insulator is applied to also have in the super high voltage direct current electricity transmission following point: the one, and the DC line electric current is different with the alternating current circuit electric current, under DC electric field, toughened glass insulator is inner in the direct current transportation running, and the unidirectional migration and the local ion aggregation of ion can take place, thereby cause the aging of toughened glass insulator; The 2nd, for reducing toughened glass insulator by the possibility of air breakdown, effectively improve the flashover voltage and the puncture voltage of toughened glass insulator under the heavy pollution, DC circuit is higher to the volume resistance and the ionic mobility requirement of toughened glass insulator than alternating current circuit to the volume resistance and the ionic mobility of toughened glass insulator; Be again toughened glass insulator in the DC circuit the steel pin the cement interface than alternating current circuit in the steel pin in the easier corrosion of cement interface, the mechanical strength of steel pin and toughened glass insulator is reduced.
Summary of the invention
Problem at existing toughened glass insulator exists in super high voltage direct current electricity transmission the invention provides a kind of DC toughened glass insulator that satisfies the super high voltage direct current electricity transmission line specification requirement.
The technical scheme that the technical problem to be solved in the present invention is taked is: the percentage by weight of the glass workpiece main chemical in the described DC toughened glass insulator is: sodium oxide molybdena 〉=18.0%, potassium oxide 〉=13.6%, magnesium oxide 〉=6.1%, barium monoxide 〉=2.06%, alchlor 〉=2%, all the other are silicon dioxide.
Because sodium oxide molybdena in the glass workpiece of the present invention, potassium oxide, magnesium oxide, the percentage composition of alchlor chemical analysis is than the sodium oxide molybdena in the glass workpiece in the alternating current circuit, potassium oxide, magnesium oxide, the percentage composition of alchlor chemical analysis is corresponding have been improved more than 2%, replace sodium ion and potassium ion partly by improving the composition ratio, increased the content of alkali metal ion in the glass workpiece, utilize " polybase effect " principle in the inorganic material, suppress the migration of glass workpiece intermediate ion effectively, reduced the concentration of main charge carriers in the glass workpiece, and hinder displacement in the scramble network of ion in glass workpiece be easy to move, reduced and moved the quantity of electric charge in the glass workpiece, thereby improved the volume resistance of glass workpiece, reduce the toughened glass insulator aging speed.
The present invention is adjusting the existing basis that is used for the insulator glass spare main chemical of alternating current circuit, also by improving relative altitude between the glass workpiece full skirt (the full skirt height is the height between upper surface to the full skirt lower surface of insulator), make relative height ratio between the adjacent full skirt be not more than 0.6 or be not less than 1.5, be that full skirt is not more than 0.6 with the first interior full skirt aspect ratio in the aspect ratio and second of full skirt in external shed and first, or the full skirt height is not less than 1.5 with the external shed and the second interior full skirt aspect ratio respectively in first, make full skirt be high from outside to inside successively, low, high state or be low from outside to inside successively, high, low, high state, increase air distance and flashover voltage between the full skirt, thereby improved the flashover voltage and the puncture voltage of toughened glass insulator under the heavy pollution.
In order to improve steel pin corrosion resistance in direct current transportation of toughened glass insulator, the steel pin of DC toughened glass insulator is provided with purity and is not less than 99.95% zinc cover.And the steel pin contacts area 80% or more greater than the steel pin with the zinc cover with the fusion area of zinc cover.
The main performance index of toughened glass insulator of the present invention:
SF6 punctures withstand voltage:＞210K, 50% lightning impulse flashover voltage:＞140KV
Direct current is done (wetting) flashover voltage:＞140 (55) KV, minimum nominal creepage distance: 545 millimeters
Glass workpiece in the described DC toughened glass insulator is after the chemical analysis ratio that improves oxides such as sodium oxide molybdena, potassium oxide, by displacement, reduced the migration amount of electric charge, improved the volume resistance of glass workpiece, be 90 ℃ in temperature, when direct voltage is 70KV, the volume resistance of glass workpiece is 4.4 * 10
10Ohm, the charge storage amount is 3.3 coulombs, is being all 90 ℃, when direct voltage is 70KV, is comparing before the chemical analysis adjustment, and its volume resistance has improved more than three times, and the charge storage amount has increased more than the twice.Glass workpiece in the described DC toughened glass insulator is 70KV at direct voltage, when temperature is 150 ℃, its volume resistance value also is not less than 0.038 * 10
10Ohm, its glass workpiece has good insulation performance under 150 ℃ of environment for use temperature.
Description of drawings
Fig. 1 is a sectional structure schematic diagram of the present invention.
Embodiment
Claims (4)
1. DC toughened glass insulator, it comprises chapeau de fer (2), glass workpiece (8), steel pin (4) and adhesive (5), described glass workpiece (8) has the full skirt (10) and the second interior full skirt (9) in the external shed (11), first, it is characterized in that: the chemical analysis percentage by weight of described glass workpiece (8) is: sodium oxide molybdena 〉=18.0%, potassium oxide 〉=13.6%, magnesium oxide 〉=6.1%, barium monoxide 〉=2.06%, alchlor 〉=2.0%, all the other are silicon dioxide.
2. DC toughened glass insulator according to claim 1 is characterized in that: the aspect ratio of full skirt (10) and the second interior full skirt (9) are not more than 0.6 with first interior full skirt (10) aspect ratio in the described external shed (11) and first.
3. DC toughened glass insulator according to claim 1 is characterized in that: full skirt (10) is not less than 1.5 with the external shed (11) and second interior full skirt (9) aspect ratio highly respectively in first.
4. DC toughened glass insulator according to claim 1 and 2 is characterized in that: steel pin (4) is provided with zinc cover (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101230360A CN101826382B (en) | 2010-03-12 | 2010-03-12 | DC toughened glass insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101230360A CN101826382B (en) | 2010-03-12 | 2010-03-12 | DC toughened glass insulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101826382A CN101826382A (en) | 2010-09-08 |
| CN101826382B true CN101826382B (en) | 2011-08-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101230360A Expired - Fee Related CN101826382B (en) | 2010-03-12 | 2010-03-12 | DC toughened glass insulator |
Country Status (1)
| Country | Link |
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| CN (1) | CN101826382B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568710A (en) * | 2011-12-29 | 2012-07-11 | 浙江金利华电气股份有限公司 | Large-tonnage disc-shaped suspension type glass insulator |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568711A (en) * | 2011-12-29 | 2012-07-11 | 浙江金利华电气股份有限公司 | 90-tonnage disk suspended glass insulator |
| CN105097149A (en) * | 2015-09-17 | 2015-11-25 | 萍乡市长岭电瓷制造有限公司 | Pin-type porcelain insulator for line |
| CN106740282A (en) * | 2017-01-22 | 2017-05-31 | 中铁电气化局集团宝鸡器材有限公司 | I-shaped conductor rail insulation support device |
| CN108305729A (en) * | 2018-04-03 | 2018-07-20 | 江西爱瑞达电瓷电气有限公司 | A kind of laminated toughened glass insulator and preparation method |
| CN108987002A (en) * | 2018-07-16 | 2018-12-11 | 江西泉新电气有限公司 | A kind of laminated toughened glass insulator and preparation method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001243914A (en) * | 2000-02-28 | 2001-09-07 | Matsushita Electric Ind Co Ltd | Fluorescent lamp |
| CN101030465A (en) * | 2006-03-03 | 2007-09-05 | 赵辅 | Composite insulator |
| CN201237954Y (en) * | 2008-06-23 | 2009-05-13 | 南京电气（集团）有限责任公司 | Disk-shaped suspension type glass insulator with long creepage distance |
| CN101475308A (en) * | 2009-02-04 | 2009-07-08 | 南京电气（集团）有限责任公司 | Glass formula for producing direct current glass insulator |
-
2010
- 2010-03-12 CN CN2010101230360A patent/CN101826382B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001243914A (en) * | 2000-02-28 | 2001-09-07 | Matsushita Electric Ind Co Ltd | Fluorescent lamp |
| CN101030465A (en) * | 2006-03-03 | 2007-09-05 | 赵辅 | Composite insulator |
| CN201237954Y (en) * | 2008-06-23 | 2009-05-13 | 南京电气（集团）有限责任公司 | Disk-shaped suspension type glass insulator with long creepage distance |
| CN101475308A (en) * | 2009-02-04 | 2009-07-08 | 南京电气（集团）有限责任公司 | Glass formula for producing direct current glass insulator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568710A (en) * | 2011-12-29 | 2012-07-11 | 浙江金利华电气股份有限公司 | Large-tonnage disc-shaped suspension type glass insulator |
| CN102568710B (en) * | 2011-12-29 | 2014-08-13 | 浙江金利华电气股份有限公司 | Large-tonnage disc-shaped suspension type glass insulator |
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| Publication number | Publication date |
|---|---|
| CN101826382A (en) | 2010-09-08 |
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Granted publication date: 20110810 Termination date: 20120312 |