CN105610049B - Gas discharge tube - Google Patents
Gas discharge tube Download PDFInfo
- Publication number
- CN105610049B CN105610049B CN201610104225.0A CN201610104225A CN105610049B CN 105610049 B CN105610049 B CN 105610049B CN 201610104225 A CN201610104225 A CN 201610104225A CN 105610049 B CN105610049 B CN 105610049B
- Authority
- CN
- China
- Prior art keywords
- electrode
- low
- gas discharge
- discharge tube
- temperature
- 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.)
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Links
- 239000012945 sealing adhesive Substances 0.000 claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims description 15
- 229910000679 solder Inorganic materials 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 230000008033 biological extinction Effects 0.000 abstract description 11
- 208000025274 Lightning injury Diseases 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 35
- 239000000155 melt Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 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
- H01T1/00—Details of spark gaps
- H01T1/02—Means for extinguishing arc
-
- 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
- H01T1/00—Details of spark gaps
- H01T1/15—Details of spark gaps for protection against excessive pressure
-
- 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
- H01T1/00—Details of spark gaps
- H01T1/14—Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
- Insulators (AREA)
- Gas-Filled Discharge Tubes (AREA)
Abstract
The invention provides a gas discharge tube, which comprises at least one insulating tube body, and a first electrode and a second electrode which are respectively and hermetically connected with two ends of the insulating tube body to form a discharge inner cavity, wherein the first electrode is hermetically connected with the insulating tube body through a low-temperature sealing adhesive, and the net height of an emission surface of the first electrode, which extends into the discharge inner cavity, is more than 0 and less than or equal to 1.5 mm. The gas discharge tube can play a role in releasing lightning current or overvoltage when being subjected to lightning stroke or surge overvoltage; moreover, when the low-temperature sealing adhesive is heated to melt due to heat when subjected to a certain continuous current or excessive current, the sealing state fails, and since the emission surface of the electrode is very small in net height, external air quickly enters and contacts the emission surface to perform air arc extinction, and the subsequent current is rapidly cut off.
Description
Technical Field
The invention relates to the field of overvoltage protection products, in particular to a gas discharge tube.
Background
The gas discharge tube is a switching type protection device and is generally used as an overvoltage protection device. The current gas discharge tube is formed by insulating tube body and sealing electrodes at two ends, and the inner cavity is filled with inert gas. When the voltage at two ends of the electrode of the gas discharge tube exceeds the breakdown voltage of the gas, the gap discharge is caused, the gas discharge tube is rapidly changed from a high-resistance state to a low-resistance state, and conduction is formed, so that other devices connected in parallel with the gas discharge tube are protected. However, if the overvoltage has a longer duration, a higher occurrence frequency, or a long-time current or a large current, the gas discharge tube heats up due to the long-time or frequent overcurrent, and the excessive temperature not only affects the safe use of other devices in the circuit, but also causes the risk of short circuit or burst of the gas discharge tube, even burns the circuit board of the customer to form a fire hazard.
Disclosure of Invention
The invention aims to provide a gas discharge tube which can provide effective overvoltage protection for a circuit, and can perform air arc extinction in the shortest time when overcurrent is heated up so as to rapidly cut off the circuit.
In view of this, an embodiment of the present invention provides a gas discharge tube, including at least one insulating tube body, and a first electrode and a second electrode respectively connected with two ends of the insulating tube body in a sealing manner to form a discharge cavity, wherein: the first electrode and the insulating tube body are connected in a sealing way through a low-temperature sealing adhesive, wherein the net height of the emitting surface of the first electrode, which extends into the discharge cavity, is more than 0 and less than or equal to 1.5 mm.
Further, the edge of the first electrode, which extends into the emission surface of the discharge cavity, is provided with a chamfer.
Further, the chamfer extends from the emitting surface of the first electrode to a position on the inner side surface of the first electrode opposite to the low-temperature sealing adhesive.
Further, a metal ring is arranged between the first electrode and the insulating tube body, and the first electrode and the metal ring are in sealing connection by adopting a low-temperature sealing adhesive.
Further, the low-temperature sealing adhesive is low-temperature solder or low-temperature adhesive.
Further, the net height of the emitting surface of the second electrode extending into the discharge cavity is more than 0 and less than or equal to 1.5 mm.
Further, the second electrode is in sealing connection with the insulating tube body through a low-temperature sealing adhesive.
Further, a metal ring is arranged between the second electrode and the insulating tube body, and the second electrode and the metal ring are in sealing connection by adopting a low-temperature sealing adhesive.
The gas discharge tube can play a role in releasing lightning current or overvoltage when being subjected to lightning stroke or surge overvoltage; moreover, when the low-temperature sealing adhesive is heated to melt due to heat when subjected to a certain continuous current or excessive current, the sealing state fails, and since the emission surface of the electrode is very small in net height, external air quickly enters and contacts the emission surface to perform air arc extinction, and the subsequent current is rapidly cut off.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which
FIG. 1 is a schematic view of a gas discharge tube according to an embodiment of the present invention;
FIG. 2 is an axial cross-sectional view of a gas discharge tube according to a first embodiment of the present invention;
FIG. 3 is an exploded view of a gas discharge tube according to a first embodiment of the present invention;
FIG. 4 is an exploded view of a gas discharge tube according to a second embodiment of the present invention;
Fig. 5 is an exploded view of a gas discharge tube according to a third embodiment of the present invention;
Fig. 6 is an exploded view of a gas discharge tube according to a fourth embodiment of the present invention.
Detailed Description
The invention will be further elucidated with the following examples in connection with the accompanying drawings. It should be noted in advance that the high temperature solder referred to in the invention is solder with a melting point of more than 500 ℃, and the high temperature is more than 500 ℃; the low temperature referred to in the present invention is a temperature lower than the high temperature, and is 500 ℃ or lower than 500 ℃; the low-temperature sealing adhesive is a sealing material capable of tolerating low temperature, and the material can be melted and deformed or even liquefied in an environment higher than the low temperature, so that the sealing material cannot be sealed; the insulating tube body is a glass tube, a porcelain tube or other insulating tube bodies which are suitable for being used as materials of gas discharge tubes; the gas discharge tube comprises a diode, a triode and a multipole tube.
Referring to fig. 1-3 in combination, fig. 1 is an external view of a gas discharge tube according to a first embodiment of the present invention, and fig. 2 is an axial cross-sectional view of a gas discharge tube according to a first embodiment of the present invention;
Fig. 3 is an exploded view of a gas discharge tube according to an embodiment of the present invention. As shown in fig. 1 to 3, the gas discharge tube of the present embodiment includes: the insulating tube 11 is respectively and hermetically connected with two ends of the insulating tube 11 to form a first electrode 13 and a second electrode 12 of a discharge inner cavity, wherein the first electrode 13 is hermetically connected with the insulating tube 11 through a low-temperature sealing adhesive 15, and the net height of an emitting surface of the first electrode 13 extending into the discharge inner cavity is more than 0 and less than or equal to 1.5 mm, namely h representing the net height of the emitting surface in fig. 2 is more than 0 and less than or equal to 1.5 mm. When the low-temperature sealing adhesive 15 melts at a high temperature, after the external air enters the discharge cavity, the external air quickly flows to the emission surface due to the small net height of the emission surface, so that the arc of the emission surface is extinguished, and the subsequent current is quickly cut off.
Preferably, the edge of the emission surface of the first electrode 13 extending into the discharge cavity is provided with a chamfer 131, when the low-temperature sealing adhesive 15 melts at a high temperature, external air flows into the discharge cavity along the chamfer 131 to the emission surface, so as to perform air arc extinction on the arc of the emission surface and cut off subsequent current rapidly.
It is further preferable that the chamfer 131 extends from the emitting surface of the first electrode 13 to a position opposite to the low-temperature sealing adhesive 15 on the inner side surface of the first electrode 13 so that when the low-temperature sealing adhesive 15 is melted at a high temperature, external air is rapidly introduced to the emitting surface by the chamfer 131 as soon as it enters, and the arc of the emitting surface is air-extinguished, thereby cutting off the subsequent current more rapidly.
Preferably, a metal ring 14 is disposed between the first electrode 13 and the insulating tube 11, and a low-temperature sealing adhesive 15 is used to seal and connect the first electrode 13 and the metal ring 14. The metal ring 14 and the insulating tube 11 are connected by a high-temperature sealing adhesive 16, and the second electrode 12 and the insulating tube 11 are connected by a high-temperature sealing adhesive 17.
Specifically, the low-temperature sealing adhesive 15 is a low-temperature solder or a low-temperature adhesive. Preferably, the low-temperature solder is low-temperature alloy solder or glass solder, and the melting point is about 220 ℃. The low-temperature adhesive is an organic adhesive such as glue.
The gas discharge tube can play a role in releasing lightning current or overvoltage when being subjected to lightning stroke or surge overvoltage; when the low-temperature sealing adhesive is heated to melt due to heat, the sealing state is invalid, and the emission surface of the electrode has small clear height, and the emission surface is provided with a chamfer angle, so that external air can be guided to be quickly contacted with the emission surface to perform air arc extinction, and the subsequent current is quickly cut off.
Referring to fig. 4, fig. 4 is an exploded view of a gas discharge tube according to a second embodiment of the present invention; as shown in fig. 4, the gas discharge tube of the present embodiment includes: the insulating tube 21 is respectively and hermetically connected with two ends of the insulating tube 21 to form a first electrode 23 and a second electrode 22 of a discharge inner cavity, wherein the first electrode 23 is hermetically connected with the insulating tube 21 through a low-temperature sealing adhesive 25, and the net height of an emitting surface of the first electrode 23 extending into the discharge inner cavity is more than 0 and less than or equal to 1.5 mm, namely h representing the net height of the emitting surface in fig. 2 is more than 0 and less than or equal to 1.5 mm. When the low-temperature sealing adhesive 15 melts at a high temperature, the sealing state fails, and after the external air enters the discharge cavity, the external air quickly flows to the emission surface due to the small net height of the emission surface, so that the arc of the emission surface is subjected to air arc extinction, and the subsequent current is quickly cut off.
The second embodiment differs from the first embodiment in that: the second electrode 22 in the second embodiment has the same characteristics as the first electrode 23, and has a clear height of greater than 0 and less than or equal to 1.5mm extending into the emission surface of the discharge cavity. The beneficial effects are as follows: and when the temperature rises to melt the low-temperature sealing adhesive, the sealing state fails, the air arc extinction is easier to be carried out on the gas discharge tube by the external air, and the subsequent current is rapidly cut off. The rest of the same parts are not described in detail here.
Referring to fig. 5, fig. 5 is an exploded view of a gas discharge tube according to a third embodiment of the present invention; as shown in fig. 5, the gas discharge tube of the present embodiment includes: the insulating tube 31 is respectively and hermetically connected with two ends of the insulating tube 31 to form a first electrode 33 and a second electrode 32 of a discharge inner cavity, wherein the first electrode 33 and the insulating tube 31 are hermetically connected through a low-temperature sealing adhesive 35, the net height of an emitting surface of the first electrode 33 extending into the discharge inner cavity is more than 0 and less than or equal to 1.5 mm, namely, h representing the net height of the emitting surface in fig. 2 is more than 0 and less than or equal to 1.5 mm. When the low-temperature sealing adhesive 35 melts at a high temperature, the sealing state fails, and after the external air enters the discharge cavity, the external air quickly flows to the emission surface due to the small net height of the emission surface, so that the arc of the emission surface is subjected to air extinction, and the subsequent current is quickly cut off.
The third embodiment differs from the first embodiment in that: in the third embodiment, a metal ring 39 is disposed between the second electrode 32 and the insulating tube 31, and the second electrode 32 and the metal ring 39 are hermetically connected by using a low-temperature sealing adhesive 35. The metal ring 39 and the insulating tube 31 are connected by a high-temperature sealing adhesive 37, and the second electrode 32 and the metal ring 39 are connected by a low-temperature sealing adhesive 38.
The beneficial effects are as follows: simultaneously, the first electrode and the second electrode are in sealing connection with the insulating tube body by adopting a low-temperature sealing adhesive, when the low-temperature sealing adhesive is heated and heated to be molten, the sealing state is invalid, and the two electrode ends simultaneously enter external air, so that the gas discharge tube is easy to carry out air arc extinction, and the subsequent current is rapidly cut off.
Fig. 6 is an exploded view of a gas discharge tube according to a fourth embodiment of the present invention; as shown in fig. 6, the gas discharge tube of the present embodiment includes: the insulating tube 41 is respectively and hermetically connected with two ends of the insulating tube 41 to form a first electrode 43 and a second electrode 42 of a discharge cavity, wherein the first electrode 43 and the insulating tube 41 are hermetically connected through a low-temperature sealing adhesive 45, and the net height of an emitting surface of the first electrode 43 extending into the discharge cavity is more than 0 and less than or equal to 1.5 mm, namely h representing the net height of the emitting surface in fig. 2 is more than 0 and less than or equal to 1.5 mm. When the low-temperature sealing adhesive 45 melts at a high temperature, the sealing state fails, and after the external air enters the discharge cavity, the external air quickly flows to the emission surface due to the small net height of the emission surface, so that the arc of the emission surface is subjected to air arc extinction, and the subsequent current is quickly cut off.
The fourth embodiment differs from the third embodiment in that: the second electrode 42 in the fourth embodiment has the same characteristics as the first electrode 43, and has a clear height of greater than 0 and less than or equal to 1.5 mm extending into the emission surface of the discharge chamber. The beneficial effects are as follows: and when the temperature rises to melt the low-temperature sealing adhesive, the sealing state fails, the two electrode ends simultaneously enter external air, the external air is easier to carry out air arc extinction on the gas discharge tube, and the subsequent current is rapidly cut off. The rest of the same parts are not described in detail here.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Some of the features of any of the embodiments described above may be transferred to other embodiments as well. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. It is within the scope of the present application that a low temperature sealing adhesive is used at one electrode end to seal the discharge chamber and that an ultra-thin electrode is used for the electrode.
Claims (6)
1. The utility model provides a gas discharge tube, includes at least one insulating body and with the both ends of insulating body are sealing connection respectively in order to form the first electrode and the second electrode of discharge inner chamber, its characterized in that: the first electrode is in sealing connection with the insulating tube body through a low-temperature sealing adhesive, wherein the net height of the emitting surface of the first electrode, which extends into the discharge cavity, is more than 0 and less than or equal to 1.5 mm; the edge of the emitting surface of the first electrode, which extends into the discharge cavity, is provided with a chamfer; a metal ring is arranged between the first electrode and the insulating tube body, and the first electrode is in sealing connection with the metal ring by adopting a low-temperature sealing adhesive.
2. The gas discharge tube of claim 1, wherein: the chamfer extends from the emitting surface of the first electrode to a position on the inner side surface of the first electrode opposite to the low-temperature sealing adhesive.
3. The gas discharge tube of claim 1, wherein: the low temperature sealing adhesive is low temperature solder or low temperature adhesive.
4. The gas discharge tube of claim 1, wherein: the net height of the emitting surface of the second electrode extending into the discharge cavity is more than 0 and less than or equal to 1.5 mm.
5. The gas discharge tube of claim 1 or 4, wherein: the second electrode is in sealing connection with the insulating tube body through a low-temperature sealing adhesive.
6. The gas discharge tube of claim 5, wherein: and a metal ring is arranged between the second electrode and the insulating tube body, and the second electrode is in sealing connection with the metal ring by adopting a low-temperature sealing adhesive.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610104225.0A CN105610049B (en) | 2016-02-25 | 2016-02-25 | Gas discharge tube |
| PCT/CN2016/103195 WO2017143796A1 (en) | 2016-02-25 | 2016-10-25 | Gas discharge tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610104225.0A CN105610049B (en) | 2016-02-25 | 2016-02-25 | Gas discharge tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105610049A CN105610049A (en) | 2016-05-25 |
| CN105610049B true CN105610049B (en) | 2024-05-17 |
Family
ID=55989695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610104225.0A Active CN105610049B (en) | 2016-02-25 | 2016-02-25 | Gas discharge tube |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105610049B (en) |
| WO (1) | WO2017143796A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105374653A (en) * | 2015-12-04 | 2016-03-02 | 深圳市槟城电子有限公司 | Gas discharge tube |
| CN105610049B (en) * | 2016-02-25 | 2024-05-17 | 深圳市槟城电子股份有限公司 | Gas discharge tube |
| CN107275926B (en) * | 2017-05-08 | 2022-05-24 | 隆科电子(惠阳)有限公司 | A clearance structure that is used for surge protection to have multilayer big aperture insulator ring |
| CN109755932A (en) * | 2017-11-06 | 2019-05-14 | 东莞市阿甘半导体有限公司 | A kind of AC power source surge protective device and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101868889A (en) * | 2007-11-21 | 2010-10-20 | 埃普科斯股份有限公司 | Overvoltage arrester having thermal overload protection |
| CN202034340U (en) * | 2011-05-12 | 2011-11-09 | 深圳市硕凯电子有限公司 | Minisize gas discharging pipe |
| CN103580019A (en) * | 2012-08-09 | 2014-02-12 | 菲尼克斯亚太电气（南京）有限公司 | Surge protection device for circuit board |
| CN205406956U (en) * | 2016-02-25 | 2016-07-27 | 深圳市槟城电子有限公司 | Gas discharge tube |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201263041Y (en) * | 2008-09-05 | 2009-06-24 | 深圳市槟城电子有限公司 | Patch type switch discharge device |
| JP5316020B2 (en) * | 2009-01-24 | 2013-10-16 | 三菱マテリアル株式会社 | surge absorber |
| CN105610049B (en) * | 2016-02-25 | 2024-05-17 | 深圳市槟城电子股份有限公司 | Gas discharge tube |
-
2016
- 2016-02-25 CN CN201610104225.0A patent/CN105610049B/en active Active
- 2016-10-25 WO PCT/CN2016/103195 patent/WO2017143796A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101868889A (en) * | 2007-11-21 | 2010-10-20 | 埃普科斯股份有限公司 | Overvoltage arrester having thermal overload protection |
| CN202034340U (en) * | 2011-05-12 | 2011-11-09 | 深圳市硕凯电子有限公司 | Minisize gas discharging pipe |
| CN103580019A (en) * | 2012-08-09 | 2014-02-12 | 菲尼克斯亚太电气（南京）有限公司 | Surge protection device for circuit board |
| CN205406956U (en) * | 2016-02-25 | 2016-07-27 | 深圳市槟城电子有限公司 | Gas discharge tube |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017143796A1 (en) | 2017-08-31 |
| CN105610049A (en) | 2016-05-25 |
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Address after: 518000 west side of 1st floor, building e, area a, Hongfa science and Technology Industrial Park, Tangtou community, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Penang Electronics Co.,Ltd. Address before: 518116 Shenzhen, Longgang, Guangdong province Longgang Street Baolong community Baolong four road 3 Lan Pu Yuan Industrial Zone 1 Factory A501 Applicant before: Shenzhen Bencent Electronics Co.,Ltd. |
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