CN111146052A - High-holding overvoltage protection gas discharge tube - Google Patents
High-holding overvoltage protection gas discharge tube Download PDFInfo
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- CN111146052A CN111146052A CN201911365598.3A CN201911365598A CN111146052A CN 111146052 A CN111146052 A CN 111146052A CN 201911365598 A CN201911365598 A CN 201911365598A CN 111146052 A CN111146052 A CN 111146052A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J17/00—Gas-filled discharge tubes with solid cathode
- H01J17/02—Details
- H01J17/04—Electrodes; Screens
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J17/00—Gas-filled discharge tubes with solid cathode
- H01J17/02—Details
- H01J17/20—Selection of substances for gas fillings; Specified operating pressures or temperatures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2217/00—Gas-filled discharge tubes
- H01J2217/04—Electrodes
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Abstract
The invention discloses a high-holding overvoltage protection gas discharge tube, belongs to the technical field of gas discharge tubes, and aims to provide a high-holding overvoltage protection gas discharge tube which solves the problem that circuit breaking cannot be timely recovered due to the fact that an existing gas discharge tube cannot be quickly and automatically disconnected after protection when used in a high-voltage circuit. The sealing structure comprises a ceramic shell, wherein sealing covers used for sealing the ceramic shell are connected to two ends of the ceramic shell, a first electrode and a second electrode are symmetrically arranged in the ceramic shell along the axial direction of the ceramic shell, the first electrode and the second electrode are tungsten electrodes, inert gas is filled in the ceramic shell, the inert gas is mixed gas of tritium gas and xenon gas, and electrode leads are welded on the first electrode and the second electrode respectively. The invention is suitable for protecting the gas discharge tube with high holding overvoltage.
Description
Technical Field
The invention belongs to the technical field of gas discharge tubes, and particularly relates to a high-holding overvoltage protection gas discharge tube.
Background
The gas discharge tube is an ion device manufactured by utilizing the gas discharge principle, is generally hermetically packaged by adopting ceramics, and is internally formed by filling two or a plurality of metal electrodes with gaps with inert gas. When the voltage applied to the two electrodes reaches the value that the gas in the gas discharge tube breaks down, the gas discharge tube starts to discharge and changes from high impedance to low impedance, so that the voltage across the electrodes does not exceed the breakdown voltage.
The existing overvoltage protection gas discharge tube is mainly suitable for low-voltage circuits such as circuits with the voltage lower than 250V, 150V, 100V and the like, and the circuit particularly suitable for which voltage is determined in the design of the discharge tube, and the determining parameter of the main parameter is the over-holding voltage of the discharge tube, and the voltage can be determined through testing. On the other hand, if a discharge tube having a low excess holding voltage, for example, 100V is used for a circuit having a voltage of 100V or more, it is necessary to use other components in combination, and the circuit using other components in combination has a second-order or a class-time or more disconnection after passing a lightning or surge. Therefore, when the existing low-voltage over-holding voltage is used in a high-voltage circuit, the protection cannot be quickly and automatically disconnected, and the circuit disconnection cannot be timely recovered.
In summary, it is important to improve the over-holding voltage of the gas discharge tube to achieve automatic and rapid recovery after lightning and surge protection in the high-voltage circuit, and to effectively protect key and important components in the high-voltage circuit. Therefore, it is of great significance to develop a high-holding overvoltage protection gas discharge tube.
Disclosure of Invention
The invention aims to: the utility model provides a high keep overvoltage protection gas discharge tube, can't automatic disconnection fast after solving current gas discharge tube when using in high voltage circuit, cause the problem that circuit break can't in time resume.
The technical scheme adopted by the invention is as follows:
the utility model provides a high keep overvoltage protection gas discharge tube, includes ceramic housing, and ceramic housing both ends are connected with the sealing-in lid that is used for sealed ceramic housing, along first electrode and the second electrode that ceramic housing axial direction symmetry set up in the ceramic housing, first electrode and second electrode are the tungsten electrode, still fill in the ceramic housing has inert gas, inert gas is the mist of tritium gas and xenon, first electrode and second electrode weld respectively has the electrode lead.
Furthermore, the sealing cover is made of iron-cobalt-nickel alloy.
Further, the distance between the first electrode and the second electrode is less than 0.5 mm.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the ceramic shell comprises a ceramic shell, wherein sealing covers used for sealing the ceramic shell are connected to two ends of the ceramic shell, a first electrode and a second electrode which are symmetrically arranged in the ceramic shell along the axial direction of the ceramic shell are tungsten electrodes, inert gas is filled in the ceramic shell and is mixed gas of tritium gas and xenon gas, and electrode leads are welded on the first electrode and the second electrode respectively.
With this arrangement, the first electrode and the second electrode are both tungsten electrodes, which have high work function, low sputtering rate, and thus low secondary emission coefficient. The inert gas filled in the ceramic shell is a mixed gas of tritium gas and xenon gas, and the penning effect of discharge of the mixed gas is utilized to improve the gas constant value. This gas discharge tube improves through electrode material and filling inert gas composition, this gas discharge tube's the hold voltage that crosses has improved, make it can reach 400V to cross the hold voltage, thereby can realize the thunder and lightning in the circuit below 400V, automatic quick recovery after the surge protection, realize the protection to key circuit or device when big surge and thunder and lightning destroy of circuit, can't quick automatic disconnection after effectively having solved current gas discharge tube protection when using in high voltage circuit, cause the problem that circuit break can't in time resume.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the application of the present invention to a lightning and surge protection system for a high voltage circuit;
the labels in the figure are: 1-ceramic shell, 2-sealing cover, 3-first electrode, 4-second electrode, and 5-electrode lead.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model provides a high keep overvoltage protection gas discharge tube, includes ceramic housing, and ceramic housing both ends are connected with the sealing-in lid that is used for sealed ceramic housing, along first electrode and the second electrode that ceramic housing axial direction symmetry set up in the ceramic housing, first electrode and second electrode are the tungsten electrode, still fill in the ceramic housing has inert gas, inert gas is the mist of tritium gas and xenon, first electrode and second electrode weld respectively has the electrode lead.
Furthermore, the sealing cover is made of iron-cobalt-nickel alloy.
Further, the distance between the first electrode and the second electrode is less than 0.5 mm.
In the implementation process of the invention, the first electrode and the second electrode are both tungsten electrodes, which have high work function and low sputtering rate, thus having lower secondary emission coefficient. The inert gas filled in the ceramic shell is a mixed gas of tritium gas and xenon gas, and the penning effect of discharge of the mixed gas is utilized to improve the gas constant value. This gas discharge tube improves through electrode material and filling inert gas composition, this gas discharge tube's the hold voltage that crosses has improved, make it can reach 400V to cross the hold voltage, thereby can realize the thunder and lightning in the circuit below 400V, automatic quick recovery after the surge protection, realize the protection to key circuit or device when big surge and thunder and lightning destroy of circuit, can't quick automatic disconnection after effectively having solved current gas discharge tube protection when using in high voltage circuit, cause the problem that circuit break can't in time resume.
Specifically, the formula for calculating the excess holding voltage Vc is as follows:
wherein, the lower the secondary emission coefficient gamma is, the larger the (1/gamma) is, the larger Ln (1+ 1/gamma) is, the larger Vc is.
Wherein, the larger the gas constant value B/A, the larger Vc.
Furthermore, the invention can be directly applied to high-power radar systems and also can be applied to lightning protection.
FIG. 2 is a schematic diagram of the application of the gas discharge tube of the present invention in a lightning and surge protection system for a high voltage circuit. The gas discharge tube is arranged at the input end of the circuit and used as a primary surge protection device to bear large surge current. The secondary protection device adopts a voltage dependent resistor and responds more quickly in a microsecond (mu s) time range. For a highly sensitive electronic circuit, a three-level protection device transient suppression diode can be adopted to respond to surge voltage within a picosecond (ps) level time range. When surge caused by thunder arrives, the transient suppression diode is started first, and the instantaneous overvoltage is accurately controlled to a certain level; if the surge current is large, the piezoresistor is started and certain surge current is released; the voltage across the gas discharge tube will increase until it drives the discharge of the preceding gas discharge tube, discharging a large current to ground.
Example 1
The utility model provides a high keep overvoltage protection gas discharge tube which characterized in that, includes ceramic housing, and ceramic housing both ends are connected with the sealing-in lid that is used for sealed ceramic housing, along first electrode and the second electrode that ceramic housing axial direction symmetry set up in the ceramic housing, first electrode and second electrode are the tungsten electrode, still pack in the ceramic housing has inert gas, inert gas is the mist of tritium gas and xenon, first electrode and second electrode welding have the electrode lead respectively.
With this arrangement, the first electrode and the second electrode are both tungsten electrodes, which have high work function, low sputtering rate, and thus low secondary emission coefficient. The inert gas filled in the ceramic shell is a mixed gas of tritium gas and xenon gas, and the penning effect of discharge of the mixed gas is utilized to improve the gas constant value. This gas discharge tube improves through electrode material and filling inert gas composition, this gas discharge tube's the hold voltage that crosses has improved, make it can reach 400V to cross the hold voltage, thereby can realize the thunder and lightning in the circuit below 400V, automatic quick recovery after the surge protection, realize the protection to key circuit or device when big surge and thunder and lightning destroy of circuit, can't quick automatic disconnection after effectively having solved current gas discharge tube protection when using in high voltage circuit, cause the problem that circuit break can't in time resume.
Example 2
On the basis of the embodiment 1, the sealing cover is made of iron-cobalt-nickel alloy.
Example 3
On the basis of an embodiment, the distance between the first electrode and the second electrode is less than 0.5 mm.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. The utility model provides a high overvoltage protection gas discharge tube that keeps, its characterized in that includes ceramic casing (1), and ceramic casing (1) both ends are connected with and are used for sealing up sealing cover (2) of ceramic casing (1), along first electrode (3) and second electrode (4) that ceramic casing (1) axial direction symmetry set up in ceramic casing (1), first electrode (3) are the tungsten electrode with second electrode (4), still pack in ceramic casing (1) inert gas, inert gas is the mist of tritium gas and xenon, electrode lead (5) have been welded respectively to first electrode (3) and second electrode (4).
2. A high sustaining overvoltage protection gas discharge lamp as claimed in claim 1 wherein said sealing cover (2) is made of iron cobalt nickel alloy.
3. A high sustaining overvoltage protection gas discharge tube according to claim 1 wherein the distance between said first electrode (3) and said second electrode (4) is less than 0.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911365598.3A CN111146052B (en) | 2019-12-26 | 2019-12-26 | High-holding overvoltage protection gas discharge tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911365598.3A CN111146052B (en) | 2019-12-26 | 2019-12-26 | High-holding overvoltage protection gas discharge tube |
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| Publication Number | Publication Date |
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| CN111146052A true CN111146052A (en) | 2020-05-12 |
| CN111146052B CN111146052B (en) | 2022-08-12 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3567992A (en) * | 1969-08-27 | 1971-03-02 | M O Valve Co Ltd | Gas-filled electric discharge devices |
| US4046527A (en) * | 1973-02-15 | 1977-09-06 | Ultracentrifuge Nederland N.V. | Apparatus for the stable confinement of an ionized gas column inside a magnetic field |
| US8113898B1 (en) * | 2004-06-21 | 2012-02-14 | Imaging Systems Technology, Inc. | Gas discharge device with electrical conductive bonding material |
| US8198812B1 (en) * | 2002-05-21 | 2012-06-12 | Imaging Systems Technology | Gas filled detector shell with dipole antenna |
| CN203415536U (en) * | 2013-06-25 | 2014-01-29 | 四川天微电子有限责任公司 | Gas diskharge tube |
| US8685489B1 (en) * | 2003-11-13 | 2014-04-01 | Imaging Systems Technology, Inc. | Plasma-shell PDP |
| US9281153B1 (en) * | 2008-11-22 | 2016-03-08 | Imaging Systems Technology, Inc. | Gas filled detector shell |
-
2019
- 2019-12-26 CN CN201911365598.3A patent/CN111146052B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3567992A (en) * | 1969-08-27 | 1971-03-02 | M O Valve Co Ltd | Gas-filled electric discharge devices |
| US4046527A (en) * | 1973-02-15 | 1977-09-06 | Ultracentrifuge Nederland N.V. | Apparatus for the stable confinement of an ionized gas column inside a magnetic field |
| US8198812B1 (en) * | 2002-05-21 | 2012-06-12 | Imaging Systems Technology | Gas filled detector shell with dipole antenna |
| US8685489B1 (en) * | 2003-11-13 | 2014-04-01 | Imaging Systems Technology, Inc. | Plasma-shell PDP |
| US8113898B1 (en) * | 2004-06-21 | 2012-02-14 | Imaging Systems Technology, Inc. | Gas discharge device with electrical conductive bonding material |
| US9281153B1 (en) * | 2008-11-22 | 2016-03-08 | Imaging Systems Technology, Inc. | Gas filled detector shell |
| CN203415536U (en) * | 2013-06-25 | 2014-01-29 | 四川天微电子有限责任公司 | Gas diskharge tube |
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| Publication number | Publication date |
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| CN111146052B (en) | 2022-08-12 |
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Address after: No. 233, Wulian 1st Road, Gongxing street, Shuangliu District, Chengdu, Sichuan 610200 Applicant after: Sichuan tianmicroelectronics Co.,Ltd. Address before: No. 233, Wulian 1st Road, Gongxing street, Shuangliu District, Chengdu, Sichuan 610200 Applicant before: SICHUAN TIANWEI ELECTRONIC Co.,Ltd. |
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