CN102969654A - Air discharge gap with arc chute - Google Patents
Air discharge gap with arc chute Download PDFInfo
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- CN102969654A CN102969654A CN2012105510355A CN201210551035A CN102969654A CN 102969654 A CN102969654 A CN 102969654A CN 2012105510355 A CN2012105510355 A CN 2012105510355A CN 201210551035 A CN201210551035 A CN 201210551035A CN 102969654 A CN102969654 A CN 102969654A
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- electrode
- air gap
- conductive gate
- gate sheet
- crack
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/16—Overvoltage arresters using spark gaps having a plurality of gaps arranged in series
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/16—Overvoltage arresters using spark gaps having a plurality of gaps arranged in series
- H01T4/20—Arrangements for improving potential distribution
Abstract
The invention relates to an air discharge gap with an arc chute. The air discharge gap comprises a first electrode, a second electrode and an arc chute, wherein the arc chute contains n conductive grid sheets and n+1 insulating ring sheets, wherein the middles of the n conductive grid sheets are provided with through holes; n is more than or equal to 1; the insulating ring sheets and the conductive grid sheets are arranged between the first electrode and the second electrode in an alternately overlapping way; a long air gap is formed between the first electrode and the second electrode; n+1 micro air gaps are distributed on the periphery of the long air gap; the air breakdown voltage of the micro air gap between the conductive grid sheet adjacent to the first electrode and the first electrode is far lower than the air breakdown voltage of the long air gap; and the conductive grid sheet adjacent to the first electrode is connected to the second electrode through a discharge branch circuit. The air discharge gap disclosed by the invention achieves the reasonable design of a long air gap structure with multiple micro air gaps distributed on the periphery, is far superior to the traditional product in electric properties such as air breakdown discharge, dielectric insulation recovery and the like, and is suitable for an electric surge protector.
Description
Technical field
The present invention relates to the gas discharge crack of a kind of electric Surge Protector (SPD) usefulness, particularly a kind of gas discharge crack with the blow-out grid.
Background technology
At present, the discharge gap device that is applied to Lightning Impulse Overvoltage Protection has various structures.One pole metal (goat's horn) crack is wherein a kind of.Because after gas-insulated punctures in one pole metal (goat's horn) crack, insulation recovery has long time delay, when this has just caused this kind air gap to be applied to power supply, in power-supply system, cause the afterflow problem, limited the thunder-lightning overvoltage of this kind air gap in low-voltage distribution system and used.
The patent No. is the spark gap device that the Chinese patent of ZL02107856.4 discloses a kind of bearing lightning current, this device comprises n sparkle-distributing inter space device that is connected in series, its arc ignition voltage reach owing to the series connection of sparkle-distributing inter space device the sparkle-distributing inter space device arc ignition voltage n doubly, connect sparkle-distributing gap discharge inter space device by electric capacity, wherein second and all other sparkle-distributing inter space devices be directly connected to public reference potential by electric capacity, reduce the arc ignition voltage of this spark gap device.
Publication number is that the Chinese patent of CN1450696A discloses a kind of gap, this gap relates to the gap of the part gap of a plurality of series connection, by a bypass in parallel (being composed in series by an auxiliary gap and at least one variable resistor), significantly improve the action parameter characteristic of gap.
The patent No. is that the Chinese patent of ZL200420094913.6 discloses a kind of gas discharge tube with auxiliary ignition device, and this device comprises that three utmost point discharge tubes and firing circuit form.
The gas discharge gap is used for Lightning Impulse Overvoltage Protection, and under its discharge voltage effect of surpassing, gas is with breakdown discharge.Be installed in the inter space device in the power-supply system, comprise following basic function:
1, under the lightning overvoltage effect, gas breakdown discharge in the gap;
2, lightning current is by the gap, and with the voltage clamping at discharge gap two ends at reduced levels, guarantee and high overvoltage does not appear in the device port of discharge gap parallel connection;
3, after the lightning overvoltage, the gas medium insulation recovery, the power supply afterflow is interdicted, and power up is to normal condition.
Wherein, the recovery of later gas medium insulation of lightning overvoltage, the prior art scheme adopts mode, the auxiliary electrode of gap series to assist the method for triggering mode or increase gas pressure intensity to help the gas medium insulation recovery.Lightning overvoltage assists the gas medium in the air gap to recover insulation, make the technical scheme of the fast quick-recovery normal operating conditions of power-supply system have no the related documents disclosure by the blow-out grid later.
Summary of the invention
For avoiding the discharge gap device above shortcomings in the existing Lightning Impulse Overvoltage Protection, the invention provides a kind of gas discharge crack with the blow-out grid, it disposes the blow-out grid that are comprised of some groups of conductive gate sheets with holes and dead ring between air gap two electrodes, when occuring, overvoltage impels air gap spark-over by certain discharge paths and blow-out grid, after the overvoltage, the blow-out grid assist the gas-insulated in the air gap to recover, afterflow in the blocking electric power network guarantees the fast quick-recovery normal operating conditions of power-supply system.
Gas discharge crack with the blow-out grid provided by the invention comprises: the first electrode, the second electrode and blow-out grid; In the middle of comprising n, establish these blow-out grid conductive gate sheet and n+1 insulation ring plate, wherein n＞=1 of through hole; This insulation ring plate, this conductive gate sheet is alternately laminated is arranged between the first electrode and the second electrode, forms a long air gap between these two electrodes, the individual little air gap of the n+1 that distributes on every side of this long air gap;
Wherein, near the gas breakdown voltage of conductive gate sheet of the first electrode and the little air gap between the first electrode gas breakdown voltage much smaller than this long air gap, this conductive gate sheet of close the first electrode is connected to the second electrode (the second electrode is as the reference current potential) by a discharge paths.
A conductive gate sheet of close described the first electrode and the height of the little air gap between described the first electrode are 0.15-0.4mm, and the height of this little air gap is preferably 0.2-0.3mm.
Described discharge paths can comprise a piezo-resistance, electric capacity or PTC fuse.
Described discharge paths can adopt series circuit or the parallel circuits of both compositions in piezo-resistance, electric capacity and the PTC fuse.
Except a close conductive gate sheet of described the first electrode, other conductive gate sheets can link to each other with described the second electrode (reference potential) by electric capacity or piezo-resistance, with the further action parameter characteristic of improving this gas discharge crack.
The gas discharge crack of band blow-out grid of the present invention disposes the blow-out grid that are comprised of the conductive gate sheet of some groups of band through holes and insulation ring plate between two electrodes, when occuring, overvoltage impels air gap spark-over by certain discharge paths and blow-out grid, after the overvoltage, the blow-out grid assist the gas-insulated in the air gap to recover, afterflow in the blocking electric power network guarantees the fast quick-recovery normal operating conditions of power-supply system.
Establish through hole in the middle of its conductive gate sheet, porose in the middle of the insulation ring plate, and the through hole in the middle of the conductive gate sheet is less than the hole in the middle of the insulation ring plate.These insulation ring plates, the conductive gate sheet is alternately laminated is arranged between two electrodes, forms a long air gap between these two electrodes, a plurality of little air gaps that distribute on every side of this long air gap.The long gap structure that is somebody's turn to do a plurality of little air gaps that distribute on every side is reasonable in design, and the electric properties such as its gas breakdown discharge, dielectric insulation recovery are much better than traditional product, is applicable to electric Surge Protector and uses.
Description of drawings
Fig. 1 is embodiments of the invention 1 structural representations;
Fig. 2 is the front view of the conductive gate sheet of Fig. 1 embodiment 1;
Fig. 3 is the front view of the insulation ring plate of Fig. 1 embodiment 1;
Fig. 4 is embodiments of the invention 2 structural representations;
Fig. 5 is embodiments of the invention 3 structural representations.
Embodiment
With reference to Fig. 1-3, comprise with the gas discharge crack embodiment 1 of blow-out grid: the second electrode 2 and blow-out grid 3 of the first electrode 1 of belt electrode lead-in wire 11, belt electrode lead-in wire 21; Contact conductor 11,12 is made of metallic plate usually.
These blow-out grid 3 comprise conductive gate sheet 32 and 6 insulation ring plates 31 that through hole 320 is established in 5 centres.Conductive gate sheet shown in Figure 2 32 is rectangular, the through hole of opening rectangle 320 in the middle of it; Insulation ring plate shown in Figure 3 31 is rectangular, establishes rectangular opening 310 in the middle of it; Rectangular opening 310 on the insulation ring plate 31 is greater than the through hole 320 of the rectangle on the conductive gate sheet 32.
These insulation ring plates 31, conductive gate sheet 32 alternately laminated being arranged between the first electrode 1 and the second electrode 2 form a long air gap 33 between these two electrodes, 6 little air gaps 34 distribute around this long air gap 33.
The conductive gate sheet 32 of close the first electrode 1 and the height of the little air gap 34 between the first electrode 1 are the i.e. thickness of corresponding insulation ring plate 31 of 0.2-0.3mm(), the gas breakdown voltage of this little air gap is much smaller than the gas breakdown voltage of this long air gap, and this conductive gate sheet 32 of close the first electrode 1 is connected to the second electrode 2(the second electrode 2 by a discharge paths 6 and is reference potential).This discharge paths 6 can be piezo-resistance, electric capacity or PTC fuse etc.
When lightning overvoltage is applied to two electrodes 1 of this discharge gap, 2 the time, at first causes electrode 1 and near little air gap 34 discharges that the conductive gate sheet 32 of the first electrode 1 consists of, so just impelled the discharge of long air gap 33 between two electrodes 1,2.Lightning current when flowing through air gap, is divided into 6 little electric arcs by blow-out grid 3 by electric arc, after the lightning overvoltage, this slightly electric arc cooled off rapidly by blow-out grid sheet, the gas-insulated between air gap is recovered rapidly, blocking power supply afterflow.
Above-mentioned piezo-resistance 6 can adopt electric capacity or PTC fuse to substitute, and also can adopt the series circuit of both compositions in piezo-resistance, electric capacity and the PTC fuse or parallel circuits to substitute.
Under the lightning overvoltage condition, in order to realize the gas breakdown discharge in the reliable air gap, advise that above-mentioned piezo-resistance 6 forms series circuit by a piezo-resistance and a PTC fuse and replaces.The pressure sensitive voltage of piezo-resistance should be greater than 2 times Un and less than Ut, and wherein Un is the power supply nominal voltage that is added on the air gap two end electrodes lead-in wire 11,21, and Ut is the tolerant voltage of protected equipment.
Fig. 4 embodiment 2 is identical with embodiment 1 primary structure.The gas discharge crack comprises shown in the embodiment 2: the second electrode 2 and blow-out grid 3 of the first electrode 1 of belt electrode lead-in wire 11, belt electrode lead-in wire 21; Contact conductor 11,12 is made of metallic plate usually.
These blow-out grid 3 comprise conductive gate sheet 32 and 6 insulation ring plates 31 that through hole 320 is established in 5 centres, these insulation ring plates 31, conductive gate sheet 32 alternately laminated being arranged between the first electrode 1 and the second electrode 2, form a long air gap 33 between these two electrodes, 6 little air gaps 34 distribute around this long air gap 33.
The conductive gate sheet 32 of close the first electrode 1 and the height of the little air gap 34 between the first electrode 1 are the i.e. thickness of corresponding insulation ring plate 31 of 0.15-0.35mm(), the gas breakdown voltage of this little air gap is much smaller than the gas breakdown voltage of this long air gap, this conductive gate sheet 32 near the first electrode 1 is connected to the second electrode 2(reference potential by a discharge paths 6), this discharge paths adopts series circuit or the parallel circuits of both compositions in piezo-resistance, electric capacity and the PTC fuse.
Except a close conductive gate sheet 32 of described the first electrode 1, other conductive gate sheets can select by electric capacity ( electric capacity 71,72,73 that represents such as Fig. 4) with as described in the second electrode 2(reference potential) link to each other, with the further action parameter characteristic of improving this gas discharge crack.
When lightning overvoltage is applied to two electrodes 1 of this discharge gap, 2 the time, at first causes electrode 1 and near little air gap 34 discharges that the conductive gate sheet 32 of the first electrode 1 consists of, so just impelled the discharge of long air gap 33 between two electrodes 1,2.Because gas discharge has a fixed response time, like this with are connected the electric capacity 7 of blow-out grid sheet connection and just can improve the flash-over characteristic of air-gap.Lightning current when flowing through air gap, is divided into 6 little electric arcs by the blow-out grid by electric arc, after the lightning overvoltage, this slightly electric arc cooled off rapidly by blow-out grid sheet, the gas-insulated between air gap is recovered rapidly, blocking power supply afterflow.
Fig. 5 embodiment 3 is identical with embodiment 1 primary structure.Difference is that gas discharge crack shown in the embodiment 3 is except a close conductive gate sheet 32 of described the first electrode 1, other conductive gate sheets can by piezo-resistance (piezo-resistance 81,82,83 that represents such as Fig. 5) with as described in the second electrode 2(reference potential) link to each other, with the further action parameter characteristic of improving this gas discharge crack.
When lightning overvoltage is applied to two electrodes 1 of this discharge gap, 2 the time, at first causes electrode 1 and near little air gap 34 discharges that the conductive gate sheet 32 of the first electrode 1 consists of, so just impelled the discharge of long air gap 33 between two electrodes 1,2.Because gas discharge has a fixed response time, like this with are connected the piezo-resistance 8 of blow-out grid sheet connection and just can improve the flash-over characteristic of air-gap.Lightning current when flowing through air gap, is divided into 6 little electric arcs by the blow-out grid by electric arc, after the lightning overvoltage, this slightly electric arc cooled off rapidly by blow-out grid sheet, the gas-insulated between air gap is recovered rapidly, blocking power supply afterflow.
All adopt conductive gate sheet 32 shown in Figure 2 among above-described embodiment 1-3, opened the through hole 320 of rectangle in the middle of it.In the actual design, can select circle, ellipse hole etc.
All adopted insulation ring plate 31 shown in Figure 3 among above-described embodiment 1-3, rectangular opening 310 has been arranged in the middle of it.In the actual design, the shape of through holes in the middle of the Kong Keyu conductive gate sheet in the middle of the insulation ring plate is corresponding, selects circle, slotted eye etc., and the through hole in the middle of the conductive gate sheet is less than the hole of insulation ring plate.
Among the present invention and the first electrode 1 thickness of being close to close one insulation ring plate between 0.15-0.4mm, select, according to designing requirement, the thickness of all the other insulation ring plates is between 0.2-1mm, the thickness of conductive gate sheet is between 0.5-3mm.
The conductive gate sheet 32 of close the first electrode 1 and the height of the little air gap 34 between the first electrode 1 are 0.15-0.4mm, and the height of remaining little air gap all can be identical.
Above for each embodiment and implement to describe purpose and be to describe in detail the present invention, can not be used for limiting the present invention, the various improvement of generally doing according to listed claim, be equal to replacement scheme, all should be included in the scope of claim of the present invention.
Claims (10)
1. the gas discharge crack with the blow-out grid comprises the first electrode and the second electrode; It is characterized in that further comprising:
One blow-out grid, conductive gate sheet and n+1 insulation ring plate, wherein n＞=1 of establishing through hole in the middle of it comprises n; This dead ring, this conductive gate sheet is alternately laminated is arranged between the first electrode and the second electrode, forms a long air gap between these two electrodes, the individual little air gap of the n+1 that distributes on every side of this long air gap;
Wherein, near the gas breakdown voltage of conductive gate sheet of the first electrode and the little air gap between the first electrode gas breakdown voltage much smaller than this long air gap, this conductive gate sheet of close the first electrode is connected to the second electrode by a discharge paths.
2. gas discharge as claimed in claim 1 crack, it is characterized in that: described discharge paths comprises a piezo-resistance, electric capacity or PTC fuse.
3. gas discharge as claimed in claim 1 crack is characterized in that: described discharge paths is in piezo-resistance, electric capacity and the PTC fuse both series circuit or parallel circuitss of forming.
4. gas discharge as claimed in claim 1 crack is characterized in that: the through hole in the middle of the described conductive gate sheet is circular, ellipse or rectangle.
5. gas discharge as claimed in claim 1 crack is characterized in that: the hole in the middle of the described insulation ring plate is circular, ellipse or rectangle.
6. gas discharge as claimed in claim 1 crack, it is characterized in that: the through hole in the middle of the described conductive gate sheet is less than the hole in the middle of the described insulation ring plate.
7. according to gas discharge claimed in claim 1 crack, it is characterized in that: except conductive gate sheet and the little air gap between the first electrode near described the first electrode, the height of remaining little air gap is all identical.
8. according to claim 1 or 7 described gas discharge cracks, it is characterized in that: a conductive gate sheet of close described the first electrode and the height of the little air gap between described the first electrode are 0.15-0.4mm.
9. according to gas discharge claimed in claim 8 crack, it is characterized in that: a conductive gate sheet of close described the first electrode and the height of the little air gap between described the first electrode are 0.2-0.3mm.
10. according to gas discharge claimed in claim 1 crack, it is characterized in that: except a close conductive gate sheet of described the first electrode, other conductive gate sheets link to each other with described the second electrode by electric capacity or piezo-resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105510355A CN102969654A (en) | 2012-12-18 | 2012-12-18 | Air discharge gap with arc chute |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105510355A CN102969654A (en) | 2012-12-18 | 2012-12-18 | Air discharge gap with arc chute |
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| Publication Number | Publication Date |
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| CN102969654A true CN102969654A (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012105510355A Pending CN102969654A (en) | 2012-12-18 | 2012-12-18 | Air discharge gap with arc chute |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5915757A (en) * | 1995-04-18 | 1999-06-29 | Hitachi Chemical Company, Ltd. | Electrostatic protective device and method for fabricating same |
| CN1674375A (en) * | 2004-02-23 | 2005-09-28 | 凤凰接触股份有限及两合公司 | Overvoltage protection element and ignition element for an overvoltage protection element |
| CN101345417A (en) * | 2008-08-20 | 2009-01-14 | 常州市创捷防雷电子有限公司 | Compound clearance surge protector |
| CN101764358A (en) * | 2009-06-02 | 2010-06-30 | 东莞市新铂铼电子有限公司 | Improved multi-gap metal ceramic gas discharge tube with external trigger terminal |
| CN102545196A (en) * | 2012-02-10 | 2012-07-04 | 杨国华 | Multilayer discharge gap type surge protection device |
| WO2012126720A1 (en) * | 2011-03-18 | 2012-09-27 | Dehn + Söhne Gmbh + Co. Kg | Spark gap having a plurality of individual spark gaps connected in series and present in a stacked arrangement |
-
2012
- 2012-12-18 CN CN2012105510355A patent/CN102969654A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5915757A (en) * | 1995-04-18 | 1999-06-29 | Hitachi Chemical Company, Ltd. | Electrostatic protective device and method for fabricating same |
| CN1674375A (en) * | 2004-02-23 | 2005-09-28 | 凤凰接触股份有限及两合公司 | Overvoltage protection element and ignition element for an overvoltage protection element |
| CN101345417A (en) * | 2008-08-20 | 2009-01-14 | 常州市创捷防雷电子有限公司 | Compound clearance surge protector |
| CN101764358A (en) * | 2009-06-02 | 2010-06-30 | 东莞市新铂铼电子有限公司 | Improved multi-gap metal ceramic gas discharge tube with external trigger terminal |
| WO2012126720A1 (en) * | 2011-03-18 | 2012-09-27 | Dehn + Söhne Gmbh + Co. Kg | Spark gap having a plurality of individual spark gaps connected in series and present in a stacked arrangement |
| CN102545196A (en) * | 2012-02-10 | 2012-07-04 | 杨国华 | Multilayer discharge gap type surge protection device |
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Application publication date: 20130313 |