CN201608147U - Inflation device of low voltage ceramic gas discharge tube - Google Patents
Inflation device of low voltage ceramic gas discharge tube Download PDFInfo
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- CN201608147U CN201608147U CN2010201478709U CN201020147870U CN201608147U CN 201608147 U CN201608147 U CN 201608147U CN 2010201478709 U CN2010201478709 U CN 2010201478709U CN 201020147870 U CN201020147870 U CN 201020147870U CN 201608147 U CN201608147 U CN 201608147U
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- discharge tube
- gas discharge
- vacuum seal
- heating
- ceramic gas
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Abstract
The utility model provides an inflation device of a low voltage ceramic gas discharge tube, which comprises a heating and vacuum seal welding system, a precision pressure gauge connected with the heating and vacuum seal welding system and two inflation valves arranged in parallel, and gas outlets of the two inflation valves are respectively connected with an inflation port of the heating and vacuum seal welding system. The inflation device can regulate the proportion of two mixed gases according to needs and realize the precision control of technical parameters of the discharge tube, and the low voltage ceramic gas discharge tube produced by adopting the inflation device can achieve the lower direct current breakdown voltage.
Description
Technical field
The utility model relates to the manufacturing equipment of ceramic gas discharge tube, is specifically related to the aerating device of low pressure ceramic gas discharge tube.
Background technology
The ceramic gas discharge tube electric devices that to be two electrode seal weldings with silver-copper brazing alloy the Fe-Ni-Co alloy being made in vacuum furnace make in two metallization ports of earthenware are at the inert gas that is filled with mixing before the seal welding in earthenware.The earthenware inner surface is decorated with four and the disjunct carbon line of metal layer with pencil, electrode surface is coated with and is beneficial to electronic stability electrons emitted powder, adjust the spacing of two electrodes and charge into the interior mixed inert gas gas pressure intensity of pipe, can obtain the discharge tube of various technical performances.Ceramic gas discharge tube is widely used in being used for equipment and personnel are made overvoltage protection in all kinds of electronic apparatus circuits owing to have the good characteristic that discharge capacity is big, electric capacity is little, insulation resistance is high, and is especially anti-lightning strike.
In actual applications, the puncture voltage Vs that reduces ceramic gas discharge tube is an important research project to improve the fail safe of its object of protection.Influencing puncture voltage Vs size has various factors, comprises gaseous species, pressure values, electrode distance, cathode electronics material etc.Production practices have confirmed crust Xing Dinglv, and promptly under the situation that gaseous species, cathode material are all determined, puncture voltage Vs is the function of air pressure and pole span product in discharge space.Yet when having two kinds of gases to mix in the discharge tube, its punch-through is different with single gas of planting, and Penning effect will occur in discharge.When for example in neon (Ne), sneaking into a spot of argon gas (Ar), can make the puncture voltage of gas be lower than the puncture voltage Vs of pure argon or pure neon.
According to above-mentioned physical phenomenon, current generally both at home and abroad earlier neon and argon gas are stored in the steel cylinder after by 3: 1 the molecular amounts mixed of fixing.Used aerating device as shown in Figure 1, comprise heating and vacuum seal system 1, the precision pressure gauge 2 that is connected with described heating and vacuum seal system 1, the inflation inlet 4 of heating and vacuum seal system 1 is connected with a charging valve 3, adopt the unlatching of hand-guided charging valve 3 or close the size of control inflation pressure.In the course of processing, processed product 5 piles up processing on the pedestal 6 that places heating and vacuum seal system 1 bottom, comprises vacuum degassing, filling with inert gas and seal welding.Two utmost point discharge tubes that above-mentioned aerating device is made are tested its Vs value according to a conventional method generally about 70V.Adopt this kind aerating device to have following deficiency: the ratio of (1) two kind of mixed inert gas is generally fixed value, can not regulate on demand, can not realize accurate control to the technical parameter of discharge tube; (2) be stored in of the passing of the mist of the fixed mixing ratio in the steel cylinder along with service time, gas ratio in the steel cylinder can change, the technical parameter of discharge tube changes thereupon in the production process thereby make, and especially the puncture voltage Vs of discharge tube changes greatly, and quality is restive; (3) generally about 70V, for many electronic apparatuss, this Vs value is too high, and still there is security threat in electronic apparatus for its Vs value of two utmost point discharge tubes of Zhi Zuoing.
The content of utility model
Above-mentioned deficiency at existing aerating device, the applicant improves through research, the aerating device of another kind of low pressure ceramic gas discharge tube is provided, the ratio of two kinds of mixed inert gas can be regulated on demand, can realize accurate control to the technical parameter of discharge tube, the low pressure ceramic gas discharge tube of making can reach lower dc breakdown voltage.
The technical solution of the utility model is as follows:
A kind of aerating device of low pressure ceramic gas discharge tube, comprise heating and vacuum seal system, the precision pressure gauge that is connected with described heating and vacuum seal system, also comprise two charging valves that are arranged in parallel, the gas outlet of described two charging valves is connected with the inflation inlet of described heating and vacuum seal system respectively.
Described charging valve is a needle valve.The sealed vacuum number of degrees magnitude of described needle valve is 10
-6P.
The precision of described precision pressure gauge is 0.4 grade, and show value is-0.1～0MPa.
Useful technique effect of the present utility model is:
The utility model can make two kinds of different ionization potentials single plant gas respectively in accordance with regulations value charge into separately in the discharge tube for the treatment of soldering and sealing in the vacuum seal body of heater, allow their autogamy mixing.In the instrument indication range, the ratio of Ar in mist can fix or change forever with the need, has flexibility in production and scientific research, the very high ceramic gas discharge tube of all kinds of specification qualification rates of more convenient manufacturing, and the expansion of its range of application has more prospect.Can find the fixed gas proportioning, the minimum disruptive voltage Vs value during different pressure P value; Minimum disruptive voltage Vs value in the time of also finding identical pressure P value, gas with various proportioning.Thereby find best low breakdown voltage Vs value, formed the complete process of spreading over a whole area from one point, adapt to the production requirement of all kinds of puncture voltage Vs.
Description of drawings
Fig. 1 is the structural representation of existing aerating device.
Fig. 2 is a structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is specifically described by embodiment.
As shown in Figure 2, the utility model comprises heating and vacuum seal system 1, the precision pressure gauge 2 that is connected with heating and vacuum seal system 1, also comprise two charging valves that are arranged in parallel 3 and charging valve 3 ', charging valve 3 and charging valve 3 ' gas outlet be connected with the inflation inlet 4 of heating and vacuum seal system 1 respectively.In the course of processing, processed product 5 is stacked in processing on the heating and the pedestal 6 of vacuum seal system 1 bottom.In the present embodiment, charging valve 3 and charging valve 3 ' be commercially available high accuracy needle valve, its sealed vacuum number of degrees magnitude reaches 10
-6P; Described precision pressure gauge 2 is the commercial goods, and its precision is 0.4 grade, and show value is-0.1～0MPa; Heating and vacuum seal system 1 are the commercial goods, and the connected mode and the working method of above-mentioned each equipment are same as the prior art.
Describe below by embodiment:
The manufacturing of low pressure ceramic two utmost point gas discharge tubes (model is 2R55 Φ 5.5 * 6).Material is prepared as follows:
Fe-Ni-Co alloy electrode: outer diameter D=Φ 5.5, neck root diameter d=Φ 3.9, height overall H=2.8, the high H of neck
1=2.3;
Porcelain tube: outer diameter D=Φ 5.5, inner diameter d=Φ 4.0, and high H=4.95 draws 4 of carbon lines; Electronics powder model: K203.5, two interelectrode distances 0.35 (above-mentioned alloy electrode and porcelain tube are the commercial goods, and unit is millimeter).
Venting condition is: charge into the Ne-Ar gaseous mixture, wherein the shared molecular amounts of Ar is 1.9%, and precision pressure gauge indication pressure values is-0.078MPa.
Because the initial value of precision pressure gauge be-0.1MPa, therefore be calculated as follows out when only charging into Ne, the Ne force value that shows on precision pressure gauge 2 is :-0.078+[-0.1-(0.078)] * 1.9%, the force value that obtains is-0.0784MPa.
Gas replenishment process is as follows: above-mentioned alloy electrode and porcelain tube are carried out general assembly by prior art.The ceramic gas discharge tube 5 that assembles being stacked on the pedestal 6 of heating and vacuum seal system 1 bottom, is 5 * 10 at the sealed vacuum degree
-4Progressively be warming up to 720 ℃ in the vacuum seal brazier 1 of P, remove porcelain tube, metal electrode and the adsorbed CO of electronics powder
2, N
2, NH
3Deng waste gas and moisture content, constant temperature 20 minutes is closed diffusion pump valve (not shown), stops vacuum seal brazier 1 is bled.Open neon pipeline charging valve 3 ', allow neon slowly charge in the vacuum seal brazier 1 by inflation inlet 4, when precision pressure gauge 2 indication reach-during 0.0784MPa, close neon pipeline charging valve 3 '.Open argon gas pipeline charging valve 3, allow argon gas slowly charge in the vacuum seal brazier 1 by inflation inlet 4, when precision pressure gauge 2 indication reach-during 0.078MPa, close argon gas pipeline charging valve 3.Constant temperature heated up after 20 minutes, and the vacuum seal brazier is heated to 840 ℃, and constant temperature was cut off the electricity supply after 15 minutes, took out ceramic gas discharge tube when naturally cooling to below 200 ℃.The electronics powder that product is carried out the 1.5 second time of 1.2A alternating current activates ageing.Test then.
By 100 two utmost point discharge tubes of above-mentioned explained hereafter product,, do not find gas leakage and substandard product through conventional method leak detection; Appoint and to take out 14 through conventional method test and write down its Vs value, the test data V of 1-1:(unit that sees the following form)
Contrast test: adopt aerating device shown in Figure 1, be stored in the mixed inert gas in the steel cylinder during inflation after employing neon and argon gas the molecular amounts mixed by fixing 90:10, inflation pressure is same as described above, for-0.078MPa, sealing welding technique for extra is same as described above, and is promptly identical with processing step (1), (4) of aforementioned techniques scheme, produces 100 two utmost point discharge tube products, through conventional method leak detection, do not find gas leakage and substandard product; Appoint and to take out 14 through conventional method test and write down its Vs value, the test data V of 1-2:(unit that sees the following form)
From table 1-1 and table 1-2 contrast as can be known, adopt the utility model device can control accurately that the Ar molecular amounts reaches desirable ratio in the mist, the dc breakdown voltage Vs mean value of two utmost point discharge tubes is obviously reduced.
The utility model is equally applicable to make low pressure ceramic three utmost point gas discharge tubes, also can effectively reduce puncture voltage Vs value.
Above-described only is preferred implementation of the present utility model, and the utility model is not limited to above embodiment.Be appreciated that those skilled in the art under the prerequisite that does not break away from spirit of the present utility model and design, can make other improvement and variation.
Claims (4)
1. the aerating device of a low pressure ceramic gas discharge tube, comprise heating and vacuum seal system, the precision pressure gauge that is connected with described heating and vacuum seal system, it is characterized in that: also comprise two charging valves that are arranged in parallel, the gas outlet of described two charging valves is connected with the inflation inlet of described heating and vacuum seal system respectively.
2. according to the aerating device of the described low pressure ceramic gas discharge tube of claim 1, it is characterized in that: described charging valve is a needle valve.
3. according to the aerating device of the described low pressure ceramic gas discharge tube of claim 2, it is characterized in that: the sealed vacuum number of degrees magnitude of described needle valve is 10
-6P.
4. according to the aerating device of the described low pressure ceramic gas discharge tube of claim 1, it is characterized in that: the precision of described precision pressure gauge is 0.4 grade, and show value is-0.1～0MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201478709U CN201608147U (en) | 2010-03-04 | 2010-03-04 | Inflation device of low voltage ceramic gas discharge tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201478709U CN201608147U (en) | 2010-03-04 | 2010-03-04 | Inflation device of low voltage ceramic gas discharge tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201608147U true CN201608147U (en) | 2010-10-13 |
Family
ID=42952851
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201478709U Expired - Fee Related CN201608147U (en) | 2010-03-04 | 2010-03-04 | Inflation device of low voltage ceramic gas discharge tube |
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| Country | Link |
|---|---|
| CN (1) | CN201608147U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101794698A (en) * | 2010-03-04 | 2010-08-04 | 无锡市超缘电子有限公司 | Charging method and device for low pressure ceramic gas discharge tube |
-
2010
- 2010-03-04 CN CN2010201478709U patent/CN201608147U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101794698A (en) * | 2010-03-04 | 2010-08-04 | 无锡市超缘电子有限公司 | Charging method and device for low pressure ceramic gas discharge tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Nanjing Yi Hua Electronic Technology Co., Ltd. Assignor: Wuxi Chaoyuan Electronics Co., Ltd. Contract record no.: 2013320000150 Denomination of utility model: Inflation device of low voltage ceramic gas discharge tube Granted publication date: 20101013 License type: Exclusive License Record date: 20130319 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101013 Termination date: 20140304 |