WO2009049463A1 - Tube à décharge gazeuse en métal-céramique à ouvertures multiples possédant des bornes de déclenchement externes - Google Patents

Tube à décharge gazeuse en métal-céramique à ouvertures multiples possédant des bornes de déclenchement externes Download PDF

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Publication number
WO2009049463A1
WO2009049463A1 PCT/CN2008/000523 CN2008000523W WO2009049463A1 WO 2009049463 A1 WO2009049463 A1 WO 2009049463A1 CN 2008000523 W CN2008000523 W CN 2008000523W WO 2009049463 A1 WO2009049463 A1 WO 2009049463A1
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Prior art keywords
discharge
gap
hole
discharge tube
discharge gap
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PCT/CN2008/000523
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English (en)
French (fr)
Inventor
Xianchang Zeng
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Xianchang Zeng
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Publication date
Application filed by Xianchang Zeng filed Critical Xianchang Zeng
Publication of WO2009049463A1 publication Critical patent/WO2009049463A1/zh

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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
    • H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
    • H01T4/12—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel hermetically sealed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/16—Overvoltage arresters using spark gaps having a plurality of gaps arranged in series

Definitions

  • the invention relates to the technical field of discharge tubes, and particularly relates to a multi-gap cermet gas discharge tube which can self-extinguish after a lightning strike voltage in a strong electric power system.
  • a cermet discharge tube as a voltage-dependent switching element, is widely used in electronic equipment signal systems to protect against lightning strikes due to its superior overcurrent capability, fast response time and extremely small inter-electrode capacitance.
  • the overvoltage caused by electromagnetic pulse damages the electronic equipment; in the current electronic equipment power system, the application is limited to equipotential isolation grounding, which is used to solve the common grounding in the electronic equipment power supply and signal lightning overvoltage protection scheme.
  • Crosstalk interference problem is used to solve the common grounding in the electronic equipment power supply and signal lightning overvoltage protection scheme.
  • the single-gap cermet gas discharge tube used in the world has a common defect: In the lightning protection of a strong electric power system, the single-gap cermet gas discharge tube can provide its sustain discharge voltage after the lightning overvoltage And the current, so that the overvoltage cannot be turned off by itself.
  • the single-gap cermet gas discharge tube cannot be directly applied to the power supply system of an electronic device.
  • the fundamental reason is that the cermet gas discharge tube cannot be turned off by itself after overvoltage in the high-power power system, causing the power supply to be short-circuited and the power supply system not working properly or The single gap discharge tube itself is damaged.
  • the metal oxide varistor as a non-linear resistor has the following problems that cannot be solved:
  • M0V is used as a non-linear resistor. When the lightning strikes over current, the voltage drops. There is no freewheeling problem in the lightning protection of the power system. This is its advantage, but it also brings a large power consumption. When passing an unacceptable overcurrent. M0V will be broken and opened.
  • M0V is a zinc oxide ceramic structure
  • its overcurrent capability is proportional to its cross-sectional area, but the larger the cross-sectional area, the more easily it is deformed during the firing process.
  • the current capability of the 40KA8/20 S current wave is difficult. Make it bigger.
  • the overcurrent generated by the lightning current and the electromagnetic pulse is far greater than that caused by the lightning strike and the electromagnetic pulse.
  • the residual transmission voltage is absolutely safe for the electronic device, and can be turned off automatically after the overvoltage in the power supply system, and there is no leakage current, and the overvoltage is stable for a long time.
  • Protective components are an urgent technical requirement for the global lightning strike and electromagnetic pulse overvoltage protection industry.
  • the single-gap cermet gas discharge tube is applied to the power supply system of an electronic device, that is, it cannot be turned off after the overvoltage.
  • Solving the problem that the cermet gas discharge tube is self-closing after the overvoltage has solved the potential hidden dangers in the protection scheme that is currently plagued by the lightning protection industry, and also meets the requirements of the best solution for the lightning protection of the power supply, which is exactly what the present invention will solve. The problem.
  • a schematic cross-sectional view of a single-gap cermet gas discharge tube commonly used in the prior art includes two discharge electrodes 01, a metallized ceramic tube 02, a gas discharge gap 03, and four strips. Pulse ignition electrode 04, two layers of electron emission material coating 05.
  • this structure has the following disadvantages: its glow voltage is only 70V, the arc voltage is only 30V when the current is ⁇ 100A, and only 15V when the current is >100A. After overvoltage, the power system will provide a huge short circuit current to a single gap The cermet gas discharge tube generates high-temperature thermal electron emission. At the same time, due to the power factor of the AC power system, the current and voltage are not synchronized, so that the single-gap cermet gas discharge tube cannot be turned off by itself after the power supply voltage crosses zero.
  • the object of the present invention is to provide a multi-gap cermet gas discharge tube with an external contact terminal, which is excellent for solving lightning overvoltage in electronic equipment AC 110V, 220V, 380V, 50 ⁇ 60HZ and DC power systems. And the protection of electromagnetic pulse.
  • the present invention adopts the following technical solutions: It comprises a ceramic positioning nail, a metallized ceramic insulating member, a discharge gap electrode separating plate, a discharge gap transition connecting plate, a screw electrode, a terminal, and at least two layers of ring metallization.
  • the ceramic insulator is connected with a screw electrode at both ends thereof, and a plurality of gap spaces are formed which are sealed with an inert gas.
  • the annular metallized ceramic insulator is integrally formed with an annular flange, and the upper and lower end faces of the annular flange support two discharge gap electrode isolation plates.
  • the discharge gap electrode isolation plate is provided with a ceramic positioning nail hole and a discharge extending through hole.
  • the ceramic positioning nail hole is provided with a ceramic positioning nail, and the two metallized ceramic insulating members are provided with a discharge gap transition connection isolation plate, and the discharge gap transition connection
  • the discharge plate is provided with a discharge extending through hole, the discharge extending through hole and the discharge extending through hole form a gas-related passage, and the discharge gap transition connection is integrally formed with a terminal.
  • the metallized ceramic insulator, the discharge gap electrode separator, the discharge gap transition connection separator, and the screw electrode constitute a discharge gap.
  • the terminal is disposed between two metallized ceramic insulators, one end of which is led to the outside of the metallized ceramic insulator.
  • the discharge extending through-holes are designed and distributed coaxially, and can also be designed and distributed on different axes, and are designed to be misaligned.
  • the invention has the following beneficial effects: at least two layers of the annular metallized ceramic insulating member are connected with screw electrodes at both ends thereof, and a plurality of gap spaces are formed which are sealed with an inert gas, and the annular metallized ceramic insulating member is integrally formed with an annular flange and an annular convex portion.
  • the upper and lower end faces of the edge support two discharge gap electrode isolation plates
  • the discharge gap electrode isolation plate is provided with a ceramic positioning nail hole and a discharge extending through hole
  • the ceramic positioning nail hole is provided with a ceramic positioning nail
  • two metallized ceramic insulating members are Discharge gap transition connection isolation plate, discharge gap A discharge extending through hole is formed in the transition connection isolation plate, and the discharge extending through hole and the discharge extending through hole form a gas-related passage, and the discharge gap transition connection is integrally formed with a terminal.
  • the invention solves the problem that the single-gap cermet gas discharge tube is applied to the power supply system of the electronic device through the technical solution of the high arc voltage drop of the multi-gap cermet gas discharge tube, and the single-gap cermet gas discharge tube is present after the overvoltage
  • the problem that the DC power supply system cannot be turned off by itself solves the potential hidden dangers in the protection schemes that are currently plagued by the lightning protection industry, and meets the requirements of the best solution for power supply lightning protection.
  • FIG. 1 is a cross-sectional view showing the structure of a prior art cermet gas discharge tube.
  • FIG. 2 is a schematic diagram of the working principle of the arc voltage in series according to the present invention.
  • Figure 3 is a cross-sectional view showing the structure of the present invention.
  • the multi-gap cermet gas discharge tube with the outer contact terminal includes a ceramic positioning pin 1, a metallized ceramic insulating member 2, a discharge gap electrode spacer 3, and a discharge gap transition connecting spacer 4, Screw electrode 6, terminal 9, at least two layers of annular metallized ceramic insulator 2 are connected with screw electrodes 6 at both ends, and a plurality of gap spaces are formed which are sealed with an inert gas.
  • the screw electrodes 6 can be formed into different shapes as needed.
  • the metallized ceramic insulating member 2 is integrally formed with an annular flange 5, and the upper and lower end faces of the annular flange 5 support two discharge gap electrode separating plates 3, and the discharge gap electrode separating plate 3 is provided with a ceramic positioning nail hole 10 and a discharge extending through
  • the hole 7 and the ceramic positioning nail hole 10 are provided with a ceramic positioning pin 1
  • the two metallized ceramic insulating members 2 are provided with a discharge gap transition connection isolation plate 4
  • the discharge gap transition connection isolation plate 4 is provided with a discharge extending through hole. 11.
  • the discharge extending through hole 7 and the discharge extending through hole 11 form a gas-related passage, and the discharge gap is connected to the isolation plate 4 to be integrated A terminal 9.
  • the metallized ceramic insulating member 2, the discharge gap electrode isolation plate 3, the discharge gap transition connection isolation plate 4, and the screw electrode 6 constitute a discharge gap 8.
  • the terminal 9 is disposed between the two metallized ceramic insulating members 2, and one end is led to the outside of the metallized ceramic insulating member 2.
  • the discharge extending through hole 7 and the discharge extending through hole 11 are coaxially designed and distributed, and the discharge extending through hole 7 and the discharge extending through hole 11 can also be designed and distributed on different axes, and are arranged in a misaligned design.
  • FIG. 1 shows: 220V RMS AC power supply
  • the system incorporates n series-connected discharge tubes.
  • the number of gaps, ULN-220VAC rm s, when Uab is higher than the maximum voltage of the power supply 220Vac rms peak voltage is 220X 1. 414 «311V, after the overvoltage, the power supply will not be able to generate current in the multi-gap discharge tube circuit, over voltage After that, the multi-gap cermet gas discharge tube will turn itself off.
  • the present invention is accomplished by a multi-gap discharge tube design with interconnected out-of-band contact terminals.
  • the multi-gap discharge tube is an interconnected external contact terminal: two screw electrodes 6 with connecting rods, four annular metallized ceramic insulators 2, three discharge gap transition connecting plates 4 , forty-eight ceramic positioning dies 1, eight discharge gap electrode separators 3, eleven discharge extending through holes 7, and discharge extending through holes 11, having twelve interconnected independent discharge gaps 8, three phases
  • the adjacent discharge gap transitions the multi-gap cermet gas discharge tube of the terminal 9 of the three outer contact devices extending from the isolation plate 4.
  • the discharge tube saves twenty-two connecting rod screw electrodes 6, sixteen pieces of silver-copper solder, eight metalized ceramic insulators 2, and all discharge gaps 8 through the discharge extending through-holes 7 in series with respect to the single-gap discharge tube.
  • the discharge extending through holes 11 are associated with each other. When any adjacent two discharge gaps are connected between the terminals 9 of the external contact devices extending from the isolation plate 4, the pulse ignition voltage applied by the external contact device is input, and all the discharge gaps 8 are All of the discharge extending through holes 7 and the discharge extending through holes 11 will mutually break down in an instant, so that the residual transmission voltage is forcibly controlled within the safe voltage of the electronic device by the external contact device, and all the discharge extending through holes 7
  • the discharge extending through holes 11 can be designed and distributed on a coaxial line, or can be designed and distributed on different axes, and have a misaligned design.
  • the number of discharge gaps 8 is determined by the low voltage of the protective power supply. For each additional annular metallized ceramic insulator 2, three discharge gaps 8 can be added.
  • the number of discharge gaps 8 should be 21, and the arc voltage drop of the multi-gap discharge tube is 315V or higher and higher than 220V.
  • the peak voltage of the power supply (about 311V)
  • the power system can not feed the discharge tube during the current discharge process formed by overvoltage. After the overvoltage, the discharge tube will self-extinguish, and the result of no freewheeling is reached.
  • the invention solves the problem that the single-gap cermet gas discharge tube is applied to the power supply system of the electronic device through the technical solution of the high arc voltage drop of the multi-gap cermet gas discharge tube, and the single-gap cermet gas discharge tube is present after the overvoltage
  • the problem that the DC power supply system cannot be turned off by itself solves the potential hidden dangers in the protection schemes that are currently plagued by the lightning protection industry, and meets the requirements of the best solution for power supply lightning protection.

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  • Emergency Protection Circuit Devices (AREA)

Description

带外接触发端子的多间隙金属陶瓷气体放电管
技术领域：
本发明涉及放电管技术领域， 特指一种在强电电源系统中雷击过电压后， 可以自熄的多间隙金属陶瓷气体放电管。
背景技术- 金属陶瓷放电管作为一个仅依赖于电压的开关元件， 凭借其超强的过电流 能力、 快速的响应时间及极小的极间电容， 广泛的应用在电子设备信号系统中 防护雷击及电磁脉冲带来的过电压对电子设备所造成的损害； 而在目前电子设 备电源系统中的应用仅限于等电位隔离接地， 用来解决电子设备电源及信号雷 击过电压防护方案中公共接地带来的串音干扰问题。
目前全球范围内使用的单间隙金属陶瓷气体放电管都存在一共同的缺陷： 在强电电源系统防雷中， 单间隙金属陶瓷气体放电管雷击过电压过后由于电源 系统能够提供其维持放电的电压及电流， 致使过电压过后不能自行关闭。
所以单间隙金属陶瓷气体放电管不能直接应用在电子设备电源系统中的根 本原因在于金属陶瓷气体放电管在强电电源系统中过电压后不能自行关闭， 导 致电源短路使电源系统不能正常工作或使单间隙放电管自身损坏。
由于该问题的存在， 现有的防雷方案只好釆用金属氧化物压敏电
阻 M0V。但从使用情况来看，金属氧化物压敏电阻作为一非线性电阻存在如下根 本无法解决的问题：
一， 由于 M0V固有特性漏电流的存在， 使得 M0V在电源系统中长时间的漏 电流环境下， 漏电流越来越大即所谓的老化， 至致 M0V 因热击穿短路， 并由此 带来火灾的隐患， 这也是电源防雷箱时常起火的根本原因。 广大防雷工程技术 人员作出了各种努力虽有很大改善， 但无法从根本上解决这一问题。
二， M0V作为非线性电阻， 雷击过电流时电压降高， 在电源系统雷击防护中 没有续流问題， 这是其优点， 但同时也带来了功耗大， 当通过无法承受的过电 流时， M0V将炸碎而开路。
三， 从上面情况来看 M0V的失效模式不确定， 给应用带来无法预知的结果。 四， 由于 M0V 固有特性压比的存在， 其残余传输电压高， 单级防雷无法保 证电子设备的过电压防护要求， 且一般用在第二级、 第三级、 第四级防雷箱中， 带来安装的不便及成本的增高。
五， 由于 M0V是氧化锌陶瓷结构， 其过电流能力与其截面积成正比, 但截 面积越大， 在其烧制过程中越易变形， 一般 40KA8/20 S 电流波以上其通电流 能力就很难再做大。
由以上所述， 可以看出 M0V用于电子设备电源过电压的防护是
无奈而勉强的做法。
因此， 制造出过电流能力远大于雷击及电磁脉冲带来的过电流、 残余传输电压对电子设备绝对安全、 在电源系统中过电压过后能自行关闭、 没 有漏电流，长时间稳定工作的过电压防护元件是全球雷击及电磁脉冲过电压防 护行业迫切的技术需求。
众所周知， 金属陶瓷气体放电管的过电流能力没有极限， 理论上可以做到 无穷大， 完全可以一步到位的将雷击及电磁脉冲造成的过电流泄漏干净。 在世 界上雷击最严重地区探测到的雷击峰值电流不过 300KA8/20 S电流波， 而金属 陶瓷气体放电管目前已轻松做到 500KA8/20 S电流完全能满足应用要求； 金属 陶瓷气体放电管的残余传输电压， 对于 220V， 50HZ而言使用标称值为直流击穿 电压为 600V的金属陶瓷气体放电管， 其脉冲击穿电压 1200V 电压上升率为 1000V/ P S时， 其残余传输电压为小于 1200V的脉冲尖峰， 该脉冲宽度约 1. 2 μ S, 不会对电子设备带来伤害， 即使要彻底解决该脉冲残余传输电压， 使用简单 的！^、 C滤波回路即可达到目的； 金属陶瓷气体放电管的寿命目前已能轻松达到 20年以上。
综上所述， 单间隙金属陶瓷气体放电管应用于电子设备电源系统存在的问 题即过电压过后不能自行关闭。 解决金属陶瓷气体放电管过电压过后自行关闭 的问题即解决了目前困扰防雷行业的防护方案中的潜在隐患， 也达到了电源防 雷的最佳方案的要求， 这也正是本发明将要解决的问题。
如图 1 所示， 为现有技术中普遍使用的单间隙金属陶瓷气体放电管的结构 剖面示意图， 其包括， 两个放电电极 01、一只金属化瓷管 02、一个气体放电间 隙 03、 四条脉冲点火电极 04、 两层电子发射材料涂层 05。
但是， 该结构有如下缺点： 其辉光电压仅 70V、 弧光电压在电流〈100A时仅 30V,电流〉 100A时仅 15V。 过电压后，电源系统将提供巨大的短路电流给单间隙 金属陶瓷气体放电管， 产生高温热电子发射，同时由于交流电源系统功率因素的 问题， 电流电压不同步致使单间隙金属陶瓷气体放电管在电源电压过零后不能 自行关闭。
如何解决现有技术中单间隙金属陶瓷气体放电管的上述问题，成了本发明的 关键。
发明内容：
针对现有技术的不足， 本发明的目的在于提供带外接触发端子的多间隙金 属陶瓷气体放电管， 极好地解决电子设备交流 110V、 220V、 380V, 50~60HZ及 直流电源系统中雷击过电压及电磁脉冲的防护问题。
为实现上述目的， 本发明采用如下技术方案： 其包括陶瓷定位钉， 金属化 陶瓷绝缘件， 放电间隙电极隔离板， 放电间隙过渡连接隔离板， 螺杆电极， 端 子， 至少有两层的环形金属化陶瓷绝缘件两端连接有螺杆电极， 形成的密闭有 惰性气体的多间隙空间， 环形金属化陶瓷绝缘件一体成形有环形凸缘， 环形凸 缘上下两端面支承两个有放电间隙电极隔离板， 放电间隙电极隔离板开设有陶 瓷定位钉孔、 放电延伸通孔， 陶瓷定位钉孔内安装有陶瓷定位钉， 两个金属化 陶瓷绝缘件之间设有放电间隙过渡连接隔离板， 放电间隙过渡连接隔离板上开 设有放电延伸通孔， 放电延伸通孔、 放电延伸通孔形成气体关联通路， 放电间 隙过渡连接隔离板上一体成型有端子。
所述的金属化陶瓷绝缘件、 放电间隙电极隔离板、 放电间隙过渡连接隔离 板、 螺杆电极构成放电间隙 。
所述的端子设于两个金属化陶瓷绝缘件之间， 一端引至金属化陶瓷绝缘件 外。
所述的放电延伸通孔同轴线设计分布， 也可以不同轴线设计分布， 呈错位 设计分布。
本发明有益效果为： 至少有两层的环形金属化陶瓷绝缘件两端连接有螺杆 电极， 形成的密闭有惰性气体的多间隙空间， 环形金属化陶瓷绝缘件一体成形 有环形凸缘， 环形凸缘上下两端面支承两个有放电间隙电极隔离板， 放电间隙 电极隔离板开设有陶瓷定位钉孔、 放电延伸通孔， 陶瓷定位钉孔内安装有陶瓷 定位钉， 两个金属化陶瓷绝缘件之间设有放电间隙过渡连接隔离板， 放电间隙 过渡连接隔离板上开设有放电延伸通孔， 放电延伸通孔、 放电延伸通孔形成气 体关联通路， 放电间隙过渡连接隔离板上一体成型有端子。
本发明通过多间隙金属陶瓷气体放电管的高弧光压降的技术方案解决了单 间隙金属陶瓷气体放电管应用于电子设备电源系统中， 存在的过电压过后单间 隙金属陶瓷气体放电管在交、 直流强电源系统中不能自行关闭的问题， 解决了 目前困扰防雷行业的防护方案中的潜在隐患， 达到了电源防雷的最佳方案的要 求。
附图说明- 图 1为现有技术的金属陶瓷气体放电管的结构剖视图。
图 2为本发明串联的弧光电压工作原理图。
图 3为本发明的结构剖视图。
具体实施方式：
见图 2、 3所示， 带外接触发端子的多间隙金属陶瓷气体放电管， 其包括陶 瓷定位钉 1， 金属化陶瓷绝缘件 2， 放电间隙电极隔离板 3, 放电间隙过渡连接 隔离板 4， 螺杆电极 6， 端子 9， 至少有两层的环形金属化陶瓷绝缘件 2两端连 接有螺杆电极 6， 形成的密闭有惰性气体的多间隙空间， 螺杆电极 6可根据需要 制作成不同形状， 环形金属化陶瓷绝缘件 2—体成形有环形凸缘 5， 环形凸缘 5 上下两端面支承两个有放电间隙电极隔离板 3，放电间隙电极隔离板 3开设有陶 瓷定位钉孔 10、 放电延伸通孔 7, 陶瓷定位钉孔 10内安装有陶瓷定位钉 1， 两 个金属化陶瓷绝缘件 2之间设有放电间隙过渡连接隔离板 4，放电间隙过渡连接 隔离板 4上开设有放电延伸通孔 11， 放电延伸通孔 7、 放电延伸通孔 11形成气 体关联通路， 放电间隙过渡连接隔离板 4上一体成型有端子 9。
所述的金属化陶瓷绝缘件 2、 放电间隙电极隔离板 3、 放电间隙过渡连接隔 离板 4、 螺杆电极 6构成放电间隙 8。
所述的端子 9设于两个金属化陶瓷绝缘件 2之间， 一端引至金属化陶瓷绝 缘件 2外。
所述的放电延伸通孔 7、 放电延伸通孔 11同轴线设计分布， 放电延伸通孔 7、 放电延伸通孔 11也可以不同轴线设计分布， 呈错位设计分布。
当上述多间隙金属陶瓷气体放电管因雷击过电压击穿时， 维持一个放电间 隙弧光放电所需的电压不能低于 15V, 而由 n个放电间隙 8组成的多间隙金属 陶瓷气体放电管维持其弧光放电的电压为 15V的 N倍， 图 2示： 在 220V有效值 交流电源系统中并入 n个串联得放电管， 放电管回路在高压脉冲电压击穿进入 弧光放电时 a、 b两点的电压降 Uab=nUr， Ur为单个放电管的弧光压降， n为气 体放电间隙的数量， ULN-220VAC r. m. s,当 Uab高于电源的最高电压 220Vac rms 的峰值电压为 220X 1. 414«311V时， 过电压过后电源将不能在多间隙放电管回 路中产生电流， 过电压过后多间隙金属陶瓷气体放电管将自行关闭。
本发明是通过相互关联的带外接触发端子的多间隙放电管设计方案， 来实 现上述原理的。
如图 3所示， 为相互关联的带外接触发端子的多间隙放电管： 由二个带连 接杆的螺杆电极 6， 四个环形金属化陶瓷绝缘件 2,三个放电间隙过渡连接隔离 板 4， 四十八个陶瓷定位丁 1， 八片放电间隙电极隔板 3， 十一个放电延伸通孔 7、放电延伸通孔 11构成的， 拥有十二个相互关联的独立的放电间隙 8, 三个相 邻放电间隙过渡连接隔离板 4延伸出的三个外接触发装置的端子 9的多间隙金 属陶瓷气体放电管。 该放电管相对于单间隙放电管串联要节约二十二个连接杆 的螺杆电极 6， 十六片银铜焊料， 八个金属化陶瓷绝缘件 2， 且所有放电间隙 8 通过放电延伸通孔 7、 放电延伸通孔 11相互关联， 当任意相邻两个放电间隙过 渡连接隔离板 4延伸出的外接触发装置的端子 9之间输入外接触发装置施加的 脉冲点火电压时， 所有的放电间隙 8在所有的放电延伸通孔 7、 放电延伸通孔 11 的作用下都将在瞬间相互击穿， 这样通过外接触发装置强制将残余传输电压 控制在电子设备电源安全电压内， 所有的放电延伸通孔 7、 放电延伸通孔 11可 以同轴线设计分布， 也可以不同轴线设计分布， 呈错位分布设计。
放电间隙 8数量的多少， 由防护电源电压的髙低决定， 每增加一个环形金 属化陶瓷绝缘件 2可增加三个放电间隙 8。
例如： 电源电压为有效值 220V的交流电源系统中使用多间隙金属陶瓷气体 放电管时， 放电间隙 8数量应采用二十一个， 此时多间隙放电管的弧光压降为 315V以上高于 220V电源的峰值电压（约 311V), 电源系统在过电压过形成的电 流泄放过程中不能给放电管馈电， 过电压过后放电管将自行熄灭， 达到没有续 流的结果。 本发明通过多间隙金属陶瓷气体放电管的高弧光压降的技术方案解决了单 间隙金属陶瓷气体放电管应用于电子设备电源系统中， 存在的过电压过后单间 隙金属陶瓷气体放电管在交、 直流强电源系统中不能自行关闭的问题， 解决了 目前困扰防雷行业的防护方案中的潜在隐患， 达到了电源防雷的最佳方案的要 求。
以上所述实施例， 只是本发明的较佳实例， 并非来限制本发明实施范围， 故凡依本发明申请专利范围所述的构造、 特征及原理所做的等效变化或修饰， 均应包括本发明专利申请范围内。

Claims

权利要求书
1、 带外接触发端子的多间隙金属陶瓷气体放电管， 其包括陶瓷定位钉 (1) , 金属化陶瓷绝缘件 (2) ,放电间隙电极隔离板 (3)，放电间隙过渡连接隔离板 (4)， 螺杆电极 (6)， 端子 (9)， 其特征在于： 至少有两层的环形金属化陶瓷绝缘件 (2) 两端连接有螺杆电极 (6)， 形成的密闭有惰性气体的多间隙空间， 环形金属化陶 瓷绝缘件 (2)—体成形有环形凸缘 (5) , 环形凸缘 (5)上下两端面支承两个有放电 间隙电极隔离板 (3)， 放电间隙电极隔离板 (3)开设有陶瓷定位钉孔 (10)、 放电 延伸通孔 (7)， 陶瓷定位钉孔（10)内安装有陶瓷定位钉（1) , 两个金属化陶瓷绝 缘件 (2)之间设有放电间隙过渡连接隔离板 (4)， 放电间隙过渡连接隔离板 (4)上 开设有放电延伸通孔 (11) , 放电延伸通孔 (7)、 放电延伸通孔（11)形成气体关联 通路， 放电间隙过渡连接隔离板 (4) 上一体成型有端子 (9)。
2、 根据权利要求 1所述的带外接触发端子的多间隙金属陶瓷气体放电管， 其特征在于： 所述的金属化陶瓷绝缘件 (2)、 放电间隙电极隔离板 (3)、 放电间 隙过渡连接隔离板 （4)、 螺杆电极 （6)构成放电间隙 （8)。
3、 根据权利要求 1所述的带外接触发端子的多间隙金属陶瓷气体放电管， 其特征在于： 所述的端子 (9)设于两个金属化陶瓷绝缘件 (2)之间， 一端引至金 属化陶瓷绝缘件 (2)外。
4、 根据权利要求 1所述的带外接触发端子的多间隙金属陶瓷气体放电管， 其特征在于： 所述的放电延伸通孔 (7)、 放电延伸通孔 (11)同轴线设计分布。
5、 根据权利要求 1所述的带外接触发端子的多间隙金属陶瓷气体放电管， 其特征在于： 所述的放电延伸通孔 (7)、 放电延伸通孔 (11)不同轴线设计分布， 呈错位设计分布。
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