CN1588718A - No-follow curren metal ceramic gas discharge tube - Google Patents
No-follow curren metal ceramic gas discharge tube Download PDFInfo
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- CN1588718A CN1588718A CN 200410051094 CN200410051094A CN1588718A CN 1588718 A CN1588718 A CN 1588718A CN 200410051094 CN200410051094 CN 200410051094 CN 200410051094 A CN200410051094 A CN 200410051094A CN 1588718 A CN1588718 A CN 1588718A
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- Prior art keywords
- electrode
- discharge tube
- gas discharge
- afterflow
- interior electrode
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- 239000000919 ceramic Substances 0.000 title claims abstract description 26
- 239000002184 metal Substances 0.000 title claims description 5
- 229910052751 metal Inorganic materials 0.000 title claims description 5
- 239000007789 gas Substances 0.000 claims abstract description 52
- 238000007599 discharging Methods 0.000 claims abstract description 21
- 239000011261 inert gas Substances 0.000 claims abstract description 4
- 208000025274 Lightning injury Diseases 0.000 abstract 2
- 239000012212 insulator Substances 0.000 abstract 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010891 electric arc Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 229910052571 earthenware Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
This metal-ceramic gas discharge tube for unordered current after lightning stroke used for strong current system involves: inner electrode, outer electrode and metallized ceramic insulator. The three are combined to form a space filled with inert gas. In the space there are: discharging gap and one end of inner electrode. It also has central hole coaxial with said inner electrode and several gas-inlet holes connected to siad central hole. The gas inlet hole, central hole and discharging gap are combined to form a circulation loop. This invention solves problems such as: unordered flow in electric source of electronic device, and lightning stroke problem.
Description
Technical field:
The present invention relates to the discharge tube technical field, refer in particular to a kind of in the forceful electric power power-supply system after the Lightning Over-voltage, the ceramet gas discharge tube of no afterflow.
Background technology:
Known, the cermet discharge tube is as a switch element that only depends on voltage, rely on its superpower overcurrent capability, response time and minimum interelectrode capacitance fast, be applied in protection thunderbolt and electromagnetic pulse bring in the electronic equipment signal system overvoltage widely infringement that electronic equipment caused; And the application in present electronic equipment power source system only limits to equipotential isolation ground connection, with solving the cross-talk problem that common ground brings in electronic equipment power source and the signal thunderbolt overvoltage protection scheme.
According to incompletely statistics, all there is a common defective in the ceramet gas discharge tube that uses in the global range at present: in the lightning protection of forceful electric power power-supply system, the ceramet gas discharge tube Lightning Over-voltage causes overvoltage can not close (being afterflow) voluntarily later later because power-supply system can provide its voltage of keeping discharge and electric current.
In addition, the ceramet gas discharge tube basic reason that can not directly be applied in the electronic equipment power source system is that there is afterflow in ceramet gas discharge tube in the forceful electric power power-supply system.This afterflow can cause power supply short circuit to make the power-supply system cisco unity malfunction or discharge tube self is damaged.
Because the existence of this problem, existing lightning protection scheme have to adopt metal oxide piezo-resistance-MOV.But from over a long time operating position before this, there is following insurmountable at all problem in the metal oxide piezo-resistance as a nonlinear resistance:
One, because MOV inherent characteristic--the existence of-leakage current, make MOV in power-supply system for a long time under the leakage current environment, leakage current increasing (being so-called aging), to causing MOV because of the thermal breakdown short circuit, and bringing the hidden danger of fire thus, this also is a power lightning protection case basic reason on fire often.Though vast lightening protection engineering technical staff has made various effort and has been greatly improved, and can't fundamentally address this problem.
Its two, MOV is as nonlinear resistance, the voltage drop height does not have the afterflow problem during thunderbolt overcurrent in the power-supply system lightning Protection, this is its advantage, but has also brought power consumption big simultaneously, when by unaffordable overcurrent, MOV will scrap and open a way.
Its three, uncertain from the failure mode of top situation MOV, bring unforeseen result to application.
They are four years old, since MOV inherent characteristic--the existence of-pressure ratio, its remaining transmission voltage height, and the single-stage lightning protection can't guarantee the overvoltage protection requirement of electronic equipment, and generally be used in the second level, the third level, the fourth stage lightning protection box, bring the inconvenience of installation and increasing of cost.
Its five because MOV is the zinc oxide ceramics structure, its overcurrent capability is directly proportional with its sectional area, but sectional area is big more, yielding more in its sintering procedure, above its galvanization ability of general 40KA (8/20 μ S current wave) just is difficult to do greatly again.
By the above, to be used for the superpotential protection of electronic equipment power source be helpless and inadequate way to MOV as can be seen.
Therefore, produce overcurrent capability much larger than thunderbolt and the overcurrent brought of electromagnetic pulse, remaining transmission voltage to electronic equipment be perfectly safe, in power-supply system overvoltage to close (not having afterflow) voluntarily later, not have the overvoltage protection element of the long-time steady operation of leakage current be whole world thunderbolt and the extremely urgent technical need of electromagnetic pulse overvoltage protection industry.
As everyone knows, the overcurrent capability of ceramet gas discharge tube does not have the limit, can accomplish infinity in theory, can settle at one go fully will be struck by lightning and overcurrent that electromagnetic pulse causes is leaked clean.The thunderbolt peak current that detects of the most serious area of thunderbolt 300KA (8/20 μ S current wave) only in the world, and ceramet gas discharge tube accomplishes easily that at present 500KA (8/20 μ S electric current) can satisfy application requirements fully; The remaining transmission voltage of ceramet gas discharge tube, for 220V, 50HZ uses nominal value to be the ceramet gas discharge tube of dc breakdown voltage as 600V, its pulse breakdown voltage≤1200V (when voltage build-up rate is 1000V/ μ S), its remaining transmission voltage is the pulse spike less than 1200V, and the about 1.2 μ S of this pulse duration can not bring injury to electronic equipment, even will thoroughly solve the remaining transmission voltage of this pulse, use simple L, C filter circuit to achieve the goal; The life-span of ceramet gas discharge tube can easily reach more than 20 years at present.
In sum, to be applied to the problem that the electronic equipment power source system exists be galvanization ability and afterflow problem to ceramet gas discharge tube.Solved the potential risk in the galvanization ability of ceramet gas discharge tube and the protectiving scheme that the afterflow problem has promptly solved present puzzlement lightning protection industry, also reached the requirement of the preferred plan of power lightning protection, this is the present invention's problem that will solve just also.
As shown in Figure 1, structural profile schematic diagram for a kind of ceramet gas discharge tube of generally using in the prior art, it comprises, two sparking electrodes 01, metallized ceramic tubes 02, gas discharge gap 03, four pulse firing electrodes 04, two-layer electronic emission material coating 05.
But this structure has following shortcoming: at first, current capacity can't be done greatly.Because the axis normal of gas discharge gap of this structure 03 and metallized ceramic pipe 02, electric arc directly forms at metallized ceramic pipe 02 inwall middle part during lightning discharge, because arc temperature makes metallized ceramic produce huge thermal stress up to several thousand～degree up to ten thousand, while is because of the effect of arc temperature, gas expands rapidly in the ceramet gas discharge tube, internal pressure rises rapidly, promptly bursts under the less through-current capability of metallized ceramic pipe 02 and ceramet gas discharge tube was lost efficacy; Secondly, Lightning Over-voltage later can not blow-out in the forceful electric power power-supply system for this structure, causes ceramet gas discharge tube and loses efficacy and damage or cause that power circuit causes fire because of overcurrent continuing to be discharged to; At last, because this structural metal earthenware 02 end face and the airtight sealing-in of metal electrode, bear gas tension that ceramet gas discharge tube inside produces because of arc temperature a little less than, the metallized ceramic pipe 02 and the junction of electrode 01 broken and make its inefficacy.
How to solve the problems referred to above of ceramet gas discharge tube in the prior art, become key of the present invention.
Summary of the invention:
The object of the present invention is to provide a kind of ceramet gas discharge tube, solve electronic equipment admirably and exchange 110V, 220V, 380V, the protection question of Lightning Over-voltage and electromagnetic pulse in the 50HZ power-supply system.
Technical scheme of the present invention is: comprise interior electrode, external electrode and metallized ceramic insulating part, triplicity forms an airtight space that is full of inert gas, one discharging gap is arranged in this space, interior electrode has an end to be positioned at the confined space that forms by after electrode, external electrode and the triplicity of metallized ceramic insulating part, and be provided with centre bore and several air admission hole that with centre bore be communicated with coaxial therein with interior electrode, wherein form a gas circulation flow path between air admission hole, centre bore and the discharging gap.
Described centre bore is along the center line axial design, and air admission hole is a radial design, and is communicated with the centre bore square crossing.
The discharging gap that electrode and external electrode constitute in described is circular parallel clearance, and the built-in part of interior electrode is an inversed taper platform shape.
The discharging gap that electrode and external electrode constitute in described is the frustum gap, and the built-in part of interior electrode or interior electrode and external electrode built-in part (mirror image) are taper type.
The discharging gap that electrode and external electrode constitute in described is a billiard table shape, and interior electrode built-in part or interior electrode and external electrode built-in part (mirror image) are billiard table shape.
Described metallized ceramic insulating part is the embedded metal potsherd.
The present invention has solved ceramet gas discharge tube by above technical scheme and has been applied in the electronic equipment power source system, the problem that exists is the afterflow problem, solved the potential risk in the protectiving scheme of present puzzlement lightning protection industry, simultaneously also solved the big problem that the metallized ceramic pipe bursts when through-flow of ceramet gas discharge tube, make the ceramet gas discharge tube through-current capability can accomplish infinity, reached the requirement of the preferred plan of power lightning protection.
Description of drawings:
Fig. 1 is the structure cut-away view of the ceramet gas discharge tube of prior art;
Fig. 2 is the structural profile schematic diagram of the present invention's embodiment;
Fig. 3 is the structure cutaway view of one of the present invention preferred embodiment;
Fig. 4 is the structure cutaway view of another preferred embodiment of the present invention.
Embodiment:
See accompanying drawing 2, electrode 10, external electrode 30 and metallized ceramic insulating part 20 in the present invention includes, form one airtight and be filled with the space of inert gas after the triplicity, be provided with a discharging gap 40 in this space, interior electrode 10 has an end to be embedded in the airtight gas compartment, and be provided with a centre bore 11 and several air admission holes 12 that is communicated with centre bore 11 at built-in end, wherein form the gas circulation flow path between air admission hole 12, centre bore 11 and the discharging gap 40.
Described centre bore 11 is along the center line axial design, and air admission hole 12 is a radial design, and is communicated with centre bore 11 square crossings.
The gas discharge device that the inside that is made of above-mentioned parts is provided with closed gas circulation flow path does not promptly have the afterflow ceramet gas discharge tube.
When above-mentioned no afterflow ceramet gas discharge tube punctures because of Lightning Over-voltage, in discharging gap 40, form electric arc, at arc temperature, under the electron stream that ionized gas produces and the electromagnetic force effect of ion flow, outwards expanding of the gas burst that discharging gap is 40 by the center, gap, in discharging gap 40, be formed centrally an area of low pressure, simultaneously outwards the gas that expands is by electrode 10 and the gas that metallizes between the ceramics 20 in the gap compression of 30 of interior electrode 10 and external electrodes, make this regional gas flow to centre bore 11 by a plurality of air admission holes 12 rapidly, because the fluid during pipe is led is led the variation of resistance because of pipe, the gas that flows into centre bore 11 by a plurality of air admission holes 12 is accelerated and sprays to discharging gap 40 in centre bore 11, flow by the outside gas jet in discharging gap 40 centers in 40 formation of discharging gap, electrical discharge arc is under this jet-stream wind effect, electric arc is elongated rapidly, the voltage of keeping discharge raises rapidly, go out to sending a telegraph expulsion of arc, thereby cut off the afterflow of ceramet gas discharge tube.
The present invention is except that the purpose that has reached above-mentioned cut-out afterflow, and structurally the discharge tube that uses has at present also been done following improvement:
At first, when the design of external electrode 30 had solved the discharge of present discharge tube among the present invention, electrical discharge arc burst problem to the radiation of metallized ceramic tubes.
Secondly, the metallized ceramic spare 20 of insulated enclosure between electrode 10 and the external electrode 30 in the present invention, change present metallized ceramic pipe, and then adopt the metallized ceramic sheet, and this metallized ceramic spare 20 is embedded in external electrode 30 inner backs and interior electrode 10 carries out the air-tightness sealing-in.When the temperature that produces when the thunderbolt overcurrent raise the discharge tube air pressure inside rapidly, what metallized ceramic spare 20 bore was uniform pressure, and metallized ceramic spare 20 can bear huge uniform pressure and do not damage.
Above-mentioned 2 improvement make overcurrent capability of the present invention can accomplish infinity, easily accomplish 500KA (8/20 μ S electric current) at present, satisfied the needs of present best electronic device power-supply system lightning protection scheme fully, made the electronic equipment power source system thunder defending reach new best effects.
In addition, the present invention is in order to solve the problem of afterflow more easily, makes the easier elongation of electric arc and cuts off afterflow, the discharging gap 40 that interior electrode 10 and external electrode 30 can be constituted according to different requirements, be made as circular parallel clearance, the built-in part 13 of interior electrode 10 is an inversed taper platform shape; Also can be made as the frustum gap, the built-in part 13 of interior electrode 10 or interior electrode 10 and external electrode 30 built-in parts 13 (mirror image) are taper type, as shown in Figure 3; Can also be made as billiard table shape, interior electrode built-in part or interior electrode 10 and external electrode 30 built-in parts 13 (mirror image) are billiard table shape, as shown in Figure 4.
The embodiment of the above is preferred embodiment of the present invention only, is not to limit practical range of the present invention with this, so the equivalence that all shapes according to the present invention, structure and principle are done changes, all should be covered by in protection scope of the present invention.
Claims (6)
1, no afterflow ceramet gas discharge tube, comprise interior electrode (10), external electrode (30) and metallized ceramic insulating part (20), triplicity forms an airtight space that is full of inert gas, one discharging gap (40) is arranged in this space, it is characterized in that: interior electrode (10) has an end to be positioned at by electrode (10), in the confined space that forms after external electrode (30) and metallized ceramic insulating part (20) triplicity, and be provided with centre bore (11) and several air admission hole (12) that with centre bore (11) be communicated with, the wherein air admission hole (12) coaxial therein with interior electrode (10), form a gas circulation flow path between centre bore (11) and the discharging gap (40).
2, no afterflow ceramet gas discharge tube according to claim 1, it is characterized in that: described centre bore (11) is along the center line axial design, and air admission hole (12) is a radial design, and is communicated with centre bore (11) square crossing.
3, no afterflow ceramet gas discharge tube according to claim 1 and 2 is characterized in that: the discharging gap (40) that interior electrode (10) and external electrode (30) constitute is circular parallel clearance, and the built-in part (13) of interior electrode (10) is an inversed taper platform shape.
4, no afterflow ceramet gas discharge tube according to claim 1 and 2, it is characterized in that: the discharging gap (40) that electrode (10) and external electrode (30) constitute in described is the frustum gap, and the built-in part (13) of interior electrode (10) or interior electrode (10) and external electrode (30) built-in part (13) (mirror image) are taper type.
5, no afterflow ceramet gas discharge tube according to claim 1 and 2, it is characterized in that: the discharging gap (40) that electrode (10) and external electrode (30) constitute in described is billiard table shape, and interior electrode built-in part (13) or interior electrode (10) and external electrode (30) built-in part (13) (mirror image) are billiard table shape.
6, no afterflow ceramet gas discharge tube according to claim 1 is characterized in that: described metallized ceramic insulating part (20) is the embedded metal potsherd.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100510941A CN100353625C (en) | 2004-08-17 | 2004-08-17 | No-follow curren metal ceramic gas discharge tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100510941A CN100353625C (en) | 2004-08-17 | 2004-08-17 | No-follow curren metal ceramic gas discharge tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1588718A true CN1588718A (en) | 2005-03-02 |
| CN100353625C CN100353625C (en) | 2007-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100510941A Expired - Fee Related CN100353625C (en) | 2004-08-17 | 2004-08-17 | No-follow curren metal ceramic gas discharge tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100353625C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009049463A1 (en) * | 2007-10-16 | 2009-04-23 | Xianchang Zeng | Multi-gap metalic ceramic gas discharge tube having external trigger terminals |
| WO2012139446A1 (en) * | 2011-04-15 | 2012-10-18 | 上海电科电器科技有限公司 | Discharge module of over-voltage protection device |
| CN103617938A (en) * | 2013-09-13 | 2014-03-05 | 东莞市新铂铼电子有限公司 | Non-follow current gas discharge tube |
| CN107369506A (en) * | 2017-08-26 | 2017-11-21 | 苏州灵亿易电子科技有限公司 | A kind of lightning protection pillar insulator of built-in discharging gap |
| CN109510186A (en) * | 2018-12-05 | 2019-03-22 | 江苏东光电子有限公司 | A kind of lightning protection device for electric power improving follow current interrupt ability |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ303709B6 (en) * | 2008-12-16 | 2013-03-27 | Hakel Spol. S R. O. | Power lightning arrester, particularly lightning arrester for heavy current loads |
| CN101764356B (en) * | 2009-06-02 | 2012-02-15 | 东莞市新铂铼电子有限公司 | High power metal ceramic gas discharge tube for power system overvoltage protection |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0268877A (en) * | 1988-09-02 | 1990-03-08 | Matsushita Electric Ind Co Ltd | Discharge gap |
| DE20020771U1 (en) * | 2000-02-22 | 2001-02-15 | Dehn & Soehne | Pressure proof encapsulated spark gap arrangement for leading off damaging disturbance variables due to overvoltages, has two opposing electrodes |
-
2004
- 2004-08-17 CN CNB2004100510941A patent/CN100353625C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009049463A1 (en) * | 2007-10-16 | 2009-04-23 | Xianchang Zeng | Multi-gap metalic ceramic gas discharge tube having external trigger terminals |
| WO2012139446A1 (en) * | 2011-04-15 | 2012-10-18 | 上海电科电器科技有限公司 | Discharge module of over-voltage protection device |
| CN103617938A (en) * | 2013-09-13 | 2014-03-05 | 东莞市新铂铼电子有限公司 | Non-follow current gas discharge tube |
| CN103617938B (en) * | 2013-09-13 | 2016-03-02 | 东莞市新铂铼电子有限公司 | Without afterflow gas discharge tube |
| CN107369506A (en) * | 2017-08-26 | 2017-11-21 | 苏州灵亿易电子科技有限公司 | A kind of lightning protection pillar insulator of built-in discharging gap |
| CN109510186A (en) * | 2018-12-05 | 2019-03-22 | 江苏东光电子有限公司 | A kind of lightning protection device for electric power improving follow current interrupt ability |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100353625C (en) | 2007-12-05 |
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Address after: 510000 Guangzhou Province, Yuexiu District martyrs Road, No. 100 Provincial Academy of Sciences, office building, room 116, No. Patentee after: Guangzhou Hopewell Technology Co., Ltd. Address before: 510000 Guangzhou Province, Yuexiu District martyrs Road, No. 100 Provincial Academy of Sciences, office building, room 116, No. Patentee before: Huawei Science-Technology Co., Ltd. |
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Address after: 510000 Guangzhou Province, Yuexiu District martyrs Road, No. 100 Provincial Academy of Sciences, office building, room 116, No. Patentee after: Huawei Science-Technology Co., Ltd. Address before: 510000 Guangzhou Province, Yuexiu District martyrs Road, No. 100 Provincial Academy of Sciences, office building, room 116, No. Patentee before: Guangzhou Hopewell Technology Co., Ltd. |
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