Accurate control method of breakdown voltage of ignition discharge tube
A technology of breakdown voltage and precise control, applied in the manufacture of discharge tubes/lamps, electrode systems, circuits, etc., to achieve the effect of controllability
Inactive Publication Date: 2013-05-15
HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to provide a method for accurately controlling the breakdown voltage of the ignition discharge tube during the production process in view of the shortcomings of the traditional production process
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Experimental program
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Embodiment Construction
[0018] The theory based on the present invention is Baschen's law and Penning effect of gas discharge science. The ignition discharge tube is a parallel double-plate electrode system. When other conditions remain unchanged, according to Baschen's law, its breakdown voltage U is a function of the product of the pressure P in the tube and the electrode spacing d (Baschen curve); Effect, mixing a small amount of impurity gas in the working gas will cause a large shift in the Basin curve. The electrode distance is a fixed value for an ignition discharge tube, so only two factors, the pressure in the tube and the gas composition, affect the breakdown voltage of the ignition discharge tube.
[0019] We analyzed the reasons for the problems in the traditional process, which well confirmed the above theory: the first change of the breakdown voltage was caused by cutting and separating the tubes after the ignition discharge tube was inflated with high-temperature flame melting glass tu...
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The invention relates to an accurate control method of the breakdown voltage of an ignition discharge tube. The method comprises the steps of carrying out triple vacuum degassing processing on parts and assemblies with larger suction capacity, accurately quantifying the pressure value of gas charged in the discharge tube and separating the discharge tube and an exhaust platform after charging thegas by cutting a metal exhaust pipe directly with hydraulic tongs. The triple vacuum degassing processing is respectively configured before soldering an electrode assembly, after soldering the electrode assembly and before sealing the whole tube, as well as in the gas charging and discharging process. The ignition discharge pipe is flexibly connected with the exhaust platform. The invention has the advantage that the breakdown voltage finally detected after production is completed with the ignition discharge tube is substantially consistent with the tube cutting voltage in the production process, therefore, the controllability of key parameters in the production process of the ignition discharge tube is realized.
Description
【Technical field】 [0001] The invention belongs to the field of gas discharge, in particular to the precise control technology of the breakdown voltage of an ignition discharge tube. 【Background technique】 [0002] Ignition discharge tubes (hereinafter referred to as discharge tubes) are widely used in the ignition systems of large-scale equipment such as aero-engines, boilers, and oil fields. For a long time, there has been a problem in the production process of discharge tubes: the lack of control means for the key parameter-breakdown voltage in the production process, that is, the final breakdown voltage value cannot be determined during the production process. Specifically, it refers to the breakdown voltage measured when the discharge tube is inflated but the glass tube has not been cut during the gas discharge process (referred to as "cutting tube voltage" in production), and the final detection voltage after production is completed. There is a deviation in the breakdo...
Claims
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IPC IPC(8): H01J9/38
Inventor 吴华夏毕竞胡海城邱祚良刘娟
Owner HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE