CN108631155A - A kind of safety-type discharge tube - Google Patents
A kind of safety-type discharge tube Download PDFInfo
- Publication number
- CN108631155A CN108631155A CN201710157808.4A CN201710157808A CN108631155A CN 108631155 A CN108631155 A CN 108631155A CN 201710157808 A CN201710157808 A CN 201710157808A CN 108631155 A CN108631155 A CN 108631155A
- Authority
- CN
- China
- Prior art keywords
- electrode
- discharge tube
- safety
- tube
- porcelain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052573 porcelain Inorganic materials 0.000 claims abstract description 45
- 238000002955 isolation Methods 0.000 claims abstract description 15
- 238000009413 insulation Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 12
- 239000007769 metal material Substances 0.000 claims description 12
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 18
- 229910052751 metal Inorganic materials 0.000 abstract description 18
- 239000000843 powder Substances 0.000 abstract description 8
- 238000012360 testing method Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010891 electric arc Methods 0.000 abstract description 4
- 238000010257 thawing Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 6
- 238000004544 sputter deposition Methods 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000012776 electronic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- H01T4/02—Details
-
- 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
- H01T4/08—Overvoltage arresters using spark gaps structurally associated with protected apparatus
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
Anti- short circuit isolation band is arranged in the safety-type discharge tube of the present invention between porcelain tube inner wall and electrode, when discharge tube conducting is in arc discharge state high temperature, the electrode metal of thawing sputters on porcelain tube inner wall, due to the effect of isolation strip, metal powder on inner wall is not readily accessible to the electrode at both ends, two electrodes of discharge tube cannot pass through porcelain tube inner wall short circuit, it is ensured that be open-circuit condition after electric discharge tube failure, the insulation resistance for testing both ends is more than 1000M ohm.In the high field of some security requirements, in railway territory, the discharge tube of the present invention is used, it can be ensured that electric discharge tube failure is high-impedance state, signal line will not be caused short-circuit, to improve by the safety of protection equipment.
Description
Technical field
The present invention is anti-thunder technical field, more particularly to a kind of safety-type discharge tube.
Background technology
Discharge tube is filled with inert gas using ceramic enclosed package, inside by two or the metal electrode of several band gaps
(argon gas or neon) is constituted.When the voltage for being added to two electrode tips reaches the gas breakdown made in gas-discharge tube, gas discharge
Pipe just starts to discharge, and becomes conducting state by high-impedance state, and the voltage at electrode both ends is made to be no more than breakdown voltage.
The operation principle of discharge tube can simply be summarized as gas discharge.When generating sufficiently large voltage between two-stage, then
Pole clearance can be caused to be discharged breakdown, at this moment it is just transformed into conducting state by high-impedance state, this phenomenon and short circuit compared with
It is similar.When under in the conduction state, the voltage of two interpolars can be relatively low, therefore, can usually between 20~50V
It plays a very good protection to late-class circuit, often by the main element as lightning protection device.
Discharge tube is mechanically damaged, the overvoltage of super tolerance, overcurrent and the factors such as internal aging can damage failure,
There are two types of failure mode is usual, one is short circuit, another kind is open circuit.Under short-circuit conditions, as described in the principle of front, will almost it protect
Protection circuit short circuit makes equipment can not be just by protection circuit and the earth short circuit so as to cause signal line or power circuit short circuit
The equipment on protected circuit is often worked or damaged, can lead to safety accident under serious conditions.Discharge tube damages under normal conditions
It can not be contemplated to be short-circuit mode or open loop failure mode, this requires equipment safety performance high application scenario（Such as railway signal
The lightning protection of equipment）It can be restricted.
Invention content
The present invention is to solve the technical deficiency of existing discharge tube poor reliability, and provide a kind of safety-type discharge tube, is lost
Effect pattern is open-circuit condition or high-impedance state, and the insulating resistance value that two electrodes are tested after failure is more than 1000M ohm, is used for railway
The lightning protection of signalling arrangement will not cause signal line short-circuit.
A kind of safety-type discharge tube, including electrode, porcelain tube and electronic emission material, the electrode form closed with porcelain tube
Space, confined space is interior filled with gas, and electrode is equipped with boss, and electronic emission material is fixed on the boss of the electrode, institute
It states porcelain tube inner wall and is provided with conductive strips, anti-short circuit isolation is equipped between electrode boss side and porcelain tube inner wall in confined space
Band.
Porcelain tube inner wall side is provided with step, there is the discontiguous spacing of both holdings between the step and electrode.
It is provided with groove on the step.
Inner tube is set in the porcelain tube, the length of inner tube is shorter than porcelain tube, and fixation is combined with porcelain tube by fixing device,
There is the discontiguous spacing of both holdings between the both ends of inner tube and two lateral electrodes.
Heat safe metal material set or insulation sleeve is arranged in the boss surrounding of the electrode, and the boss position of electrode is wrapped
Firmly, heat safe metal material set or insulation sleeve are done tapered, slightly higher than the boss of electrode.
The heat safe metal material set is made by tungsten copper.
The boss surface setting of the electrode reticulates concaveconvex structure, and the electronic emission material is placed on netted recessed
In the groove of male structure.
The conductive strips are more than 1mm at a distance from electrode.
Anti- short circuit isolation band is arranged in the safety-type discharge tube of the present invention between porcelain tube inner wall and electrode, at discharge tube conducting
When arc discharge state high temperature, the electrode metal of thawing sputters on porcelain tube inner wall, due to the effect of isolation strip, on inner wall
Metal powder is not readily accessible to the electrode at both ends, and two electrodes of discharge tube cannot pass through porcelain tube inner wall short circuit, it is ensured that discharge tube
It is open-circuit condition after failure, the insulation resistance for testing both ends is more than 1000M ohm.In the high field of some security requirements, such as
In railway territory, the discharge tube of the present invention is used, it can be ensured that electric discharge tube failure is high-impedance state, and signal wire will not be caused short out
Road, to improve by the safety of protection equipment.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Description of the drawings
Fig. 1 is conventional discharge pipe structural profile illustration.
Fig. 2 is a kind of safety-type discharge tube structure diagrammatic cross-section of the present invention.
Fig. 3 is the safety-type discharge tube structure diagrammatic cross-section of another kind of the present invention.
Fig. 4 is another safety-type discharge tube structure diagrammatic cross-section of the present invention.
Specific implementation mode
As shown in Figure 1, common discharge tube includes two or three electrodes, and porcelain tube, electronic emission material, and it is conductive
Band；Two of which electrode and the mode of porcelain tube welding form a confined space, filled with gas in the confined space；Electrode
On be typically provided boss, at intervals, the mode of electronic emission material sintering coats on boss the boss of two electrodes,
It is generally metallized ceramic insulator in the porcelain tube and makes cylindric, is additionally provided on inner wall axially extending along inner wall
Strips of conductive band, the ionization of electric field acceleration region of discharge is acted on by it, makes discharge tube that there is quick response characteristic, it is conductive
Band 2 B pencils of generally use are crossed, i.e., so-called carbon line.
The electrode of discharge tube is made by metal material, when discharge tube conducting in arc discharge state when temperature very
Height, the metal at electrode boss position are easy to melt and sputter on porcelain tube inner wall, can be by two with the accumulation of inner wall metal powder
A electrode connection, the failure of guiding discharge tube short circuit.
Anti- short circuit isolation band is arranged in the safety-type discharge tube of the present invention between porcelain tube inner wall and electrode, at discharge tube conducting
When arc discharge state high temperature, the electrode metal of thawing sputters on porcelain tube inner wall, due to the effect of isolation strip, on inner wall
Metal powder is not readily accessible to the electrode at both ends, and two electrodes of discharge tube cannot pass through porcelain tube inner wall short circuit, it is ensured that discharge tube
It is open-circuit condition after failure, the insulation resistance for testing both ends is more than 1000M ohm.
Safety-type discharge tube one embodiment of the present invention is as shown in Fig. 2, include two electrodes 1, porcelain tube 2, electron emission
Material 3, conductive strips 4；A step 21 is done in porcelain tube inner wall side, after two electrodes and porcelain tube welded seal, the step 21 and electricity
There is the discontiguous spacing of both holdings between pole 1；One groove 22 can also be set on the step of porcelain tube with increase inner wall step with
The distance of electrode 1 makes to form anti-short circuit isolation band 5 between porcelain tube 2 and electrode 1 by this structure setting, when two electrodes
On metal be splashed to porcelain tube inner wall by high temperature melt, even if on inner wall sputtering expired metal powder, due to depositing for isolation strip
Will not be short-circuit by inner wall.
As shown in figure 3, for another embodiment of the safety-type discharge tube of the present invention, in the porcelain tube 2 of discharge tube in setting
The length of pipe 7, inner tube 7 is shorter than porcelain tube 2, and fixation, the both ends of inner tube 7 and two lateral electrodes are combined with porcelain tube 2 by fixing device 8
There are the discontiguous spacing of both holdings, conductive strips 4 that the inner wall in inner tube 7 is set between 1, this structure makes inner tube 8, porcelain tube 2 and electricity
Anti- short circuit isolation band 5 is formd between pole 1, after the metal on two electrodes is splashed to inner tube 7 by high temperature melt, even if interior
Metal powder has been expired in sputtering on the inner wall of pipe 7, will not be short-circuit by inner tube due to the presence of isolation strip.
As shown in figure 4, another embodiment of the safety-type discharge tube of the present invention, resistance in 11 surrounding of the boss setting of electrode 1
The metal material of high temperature covers or insulation sleeve 6, and the boss position of electrode is encased, and heat safe metal material set or insulation sleeve 6 are done
It is tapered, the slightly higher than boss of electrode 1.When the metal on two electrodes is sputtered outward by high temperature melt, due to high temperature resistant
Metal material set or insulation sleeve 6 pyramidal structure and slightly above electrode boss, so that molten metal sputtering angle is suffered restraints,
It cannot be ejected on the inner wall of porcelain tube, can only be ejected on the electrode on opposite, i.e., in heat safe metal material set or insulation sleeve 6
An anti-short circuit isolation band 5 is formed between porcelain tube inner wall, due to the effect of isolation strip, two electrodes will not be by porcelain tube inner wall
Short circuit.The heat safe metal material set is made by tungsten copper.
One more embodiment of the present invention is to reticulate concaveconvex structure in the boss surface setting of the electrode 1, described
Electronic emission material is placed in the groove of netted concaveconvex structure, and electronic emission material is placed in groove, it is not easy to it falls off, this
The electronic material or metal powder that sample sputters outward are reduced, to reduce the short-circuit possibility at discharge tube the two poles of the earth.
Further, the length of the strips of conductive band in porcelain tube can be shortened, conductive strips are at least big at a distance from electrode
In 1mm, most preferably it is more than 1.5mm, conductive strips are remoter apart from electrode, and the possibility that two electrodes are connected by porcelain tube inner wall is with regard to smaller.
The safety-type discharge tube of the present invention applies power current until electric discharge tube failure, tests the insulation at both ends at both ends
Resistance is more than 1000OM ohm.Apply 8/20 dash current at both ends to be impacted, until electric discharge tube failure, tests the exhausted of both ends
Edge resistance is more than 1000OM ohm.Apply the test of high-frequency impulse high-speed switch at discharge tube both ends, until the tube failure that discharges, test
The insulation resistance at both ends is more than 1000OM ohm.The discharge tube of failure is dissected, on porcelain tube inner wall or has the metal of sputtering
Powder, but two electrode conductions will not be caused always.By above-mentioned it is demonstrated experimentally that anti-short circuit isolation is arranged inside discharge tube
Band can make the failure mode of discharge tube there was only open circuit mode, without short-circuit mode.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, as long as being taken in discharge tube anti-short
Road quarantine measures prevent the metal melt in discharge tube from sputtering and guiding discharge tube short circuit, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (8)
1. a kind of safety-type discharge tube, including electrode（1）, porcelain tube（2）And electronic emission material（3）, the electrode（1）With porcelain
Pipe（2）Confined space is formed, confined space is interior filled with gas, electrode（1）It is equipped with boss（11）, electronic emission material（3）Gu
It is scheduled on the electrode（1）Boss（11）On, the porcelain tube（1）Inner wall is provided with conductive strips（4）, it is characterized in that：Confined space
It is interior to be located at electrode（1）Boss side and porcelain tube（2）Anti- short circuit isolation band is equipped between inner wall（5）.
2. safety-type discharge tube according to claim 1, it is characterised in that：Porcelain tube inner wall side is provided with step（21）,
The step（21）With electrode（1）Between have the discontiguous spacing of both holdings.
3. safety-type discharge tube according to claim 2, it is characterised in that：The step（21）On be provided with groove
（22）.
4. safety-type discharge tube according to claim 1, it is characterised in that：The porcelain tube（2）Interior setting inner tube（7）,
Inner tube（7）Length compare porcelain tube（2）It is short, pass through fixing device（8）With porcelain tube（2）In conjunction with fixation, inner tube（7）Both ends and two
Lateral electrode（1）Between have the discontiguous spacing of both holdings.
5. safety-type discharge tube according to claim 1, it is characterised in that：The electrode（1）Boss（11）Surrounding
Heat safe metal material set or insulation sleeve are set（6）, by electrode（1）Boss（11）Position encases, heat safe metal material
Material set or insulation sleeve（6）Do tapered, slightly higher than electrode（1）Boss（11）.
6. safety-type discharge tube according to claim 5, it is characterised in that：The heat safe metal material set is by tungsten
Copper is made.
7. safety-type discharge tube according to any one of claims 1 to 6, it is characterised in that：The electrode（1）Boss
（11）Surface setting reticulates concaveconvex structure, the electronic emission material（4）It is placed in the groove of netted concaveconvex structure.
8. safety-type discharge tube according to any one of claims 1 to 6, it is characterised in that：The conductive strips（3）With electrode
（1）Distance be more than 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710157808.4A CN108631155A (en) | 2017-03-16 | 2017-03-16 | A kind of safety-type discharge tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710157808.4A CN108631155A (en) | 2017-03-16 | 2017-03-16 | A kind of safety-type discharge tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108631155A true CN108631155A (en) | 2018-10-09 |
Family
ID=63686242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710157808.4A Pending CN108631155A (en) | 2017-03-16 | 2017-03-16 | A kind of safety-type discharge tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108631155A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112038890A (en) * | 2020-09-02 | 2020-12-04 | 四川天微电子股份有限公司 | Integral electrode suitable for high-energy ignition gas discharge tube |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3979646A (en) * | 1974-06-28 | 1976-09-07 | Siemens Aktiengesellschaft | Surge voltage arrester |
| US4578733A (en) * | 1983-06-25 | 1986-03-25 | Kabushiki Kaisha Sankosha | Surge voltage arrester |
| CN2805155Y (en) * | 2005-07-11 | 2006-08-09 | 常州市武进江南放电管有限公司 | High frequency ceramic gas discharge lamp |
| CN203415536U (en) * | 2013-06-25 | 2014-01-29 | 四川天微电子有限责任公司 | Gas diskharge tube |
| CN205900497U (en) * | 2016-08-19 | 2017-01-18 | 深圳市槟城电子有限公司 | Gas discharge tube |
-
2017
- 2017-03-16 CN CN201710157808.4A patent/CN108631155A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3979646A (en) * | 1974-06-28 | 1976-09-07 | Siemens Aktiengesellschaft | Surge voltage arrester |
| US4578733A (en) * | 1983-06-25 | 1986-03-25 | Kabushiki Kaisha Sankosha | Surge voltage arrester |
| CN2805155Y (en) * | 2005-07-11 | 2006-08-09 | 常州市武进江南放电管有限公司 | High frequency ceramic gas discharge lamp |
| CN203415536U (en) * | 2013-06-25 | 2014-01-29 | 四川天微电子有限责任公司 | Gas diskharge tube |
| CN205900497U (en) * | 2016-08-19 | 2017-01-18 | 深圳市槟城电子有限公司 | Gas discharge tube |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112038890A (en) * | 2020-09-02 | 2020-12-04 | 四川天微电子股份有限公司 | Integral electrode suitable for high-energy ignition gas discharge tube |
| CN112038890B (en) * | 2020-09-02 | 2022-06-21 | 四川天微电子股份有限公司 | Electrode group suitable for high-energy ignition gas discharge tube |
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