CN101086947A - An efficient and long life porcelain gold halogen lamp electrode system - Google Patents
An efficient and long life porcelain gold halogen lamp electrode system Download PDFInfo
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- CN101086947A CN101086947A CNA2006100358746A CN200610035874A CN101086947A CN 101086947 A CN101086947 A CN 101086947A CN A2006100358746 A CNA2006100358746 A CN A2006100358746A CN 200610035874 A CN200610035874 A CN 200610035874A CN 101086947 A CN101086947 A CN 101086947A
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Abstract
The invention disclose a high-effect long-life ceramet halogen light electrode system, the columbium filament or columbium tube (1) is connected with tungsten filament (3) whose diameter is less than columbium filament or columbium tube (1), end of tungsten filament (3) winds corkscrew electrode (5) made by thorium tungsten filament which is thinner than tungsten filament (3), bushing (6) made by low melting point zinc or stannum or antimony or alloy or other material with low melting point is coated on tungsten filament (3) behind columbium filament or columbium tube (1). The electrode system can ensure electrode in axes position of arc tube and airtightness of arc tube, and metal halid of discharging space can not enter ceram bushing to erode encapsulation material, so the compound of metal halid is more stable, result of normal life of tube and light effect can be achieved and increased, structure of the electrode system is easy, preparation craftwork and cost are cheap.
Description
Technical field
The present invention relates to a kind of ceramic gold-halogen lamp, especially a kind of small-power efficient and long life porcelain gold halogen lamp electrode system.
Background technology
Ceramic gold-halogen lamp development in science and technology is in recent years become increasingly mature, and the big spoke of performance parameter promotes and surmounts traditional quartz metal halide lamp in all fields far away, and it uses beginning to promote fast.Even so but at present the ceramic gold-halogen lamp performance is not attained perfectly as yet, and various more advanced patented technologies are also continuing to bring out, and more perfect ceramic gold-halogen lamp will be released successively.
The common electrode (see figure 4) of small-power ceramic gold-halogen lamp is that a design is unique at present, excellent performance, but complex structure, make the patented product of difficult and expensive GE, the characteristics of this structure are at the thinner molybdenum heart yearn 2 of thicker niobium silk 1 back welding as shown in Figure 4, weld a thinner tungsten filament 3 again at molybdenum core silk 2 front ends, close around molybdenum spiral 4 on molybdenum core silk 2, at the effect of the thinner tungsten filament 5 of tungsten filament 3 front end Mi Raoshuoquan electrode temperature very high (about 3000 °) when being real electrode work, but its tungsten filament 3 is very thin, lead away heat seldom, thereafter to be full of porcelain oversleeve sucker substantially stable between two parties with support electrode for molybdenum core silk 2 and molybdenum spiral 4, and reduce heat to two ends and through the porcelain oversleeve to around scatter and disappear, isolated of the corrosion of the liquid metal halide of condensation simultaneously to the niobium silk.Because the heat insulation effect of this kind structure is better, obviously having improved the lamp cold junction temperature makes the metal halide evaporation more complete, performance is significantly improved, also can suitably increase the cell-shell volume simultaneously, reduce the wall load so that suitably reduce over against the highest wall load of the electric arc pipe shell portion temperature of electric arc, thereby reduce this place's temperature, prolong the life-span of lamp.
Electrode system shown in Figure 4 truly has multiple advantage, played great role to improving lamp behaviour, but it is also high that it makes comparatively complicated cost, more needing one, what carry is that this structure must allow that the part metals halide vapor infiltrates in the ceramic sleeve around the molybdenum spiral, and permanent deposition wherein, up between molybdenum spiral and the ceramic sleeve and with molybdenum core silk between all slits only fill up, this must cause the variation by a relatively large margin of the various photoelectric parameters of use initial stage lamp, so its improvement is very necessary.
Summary of the invention
The purpose of this invention is to provide a kind of porcelain gold halogen lamp electrode system, this ceramic gold-halogen lamp has low-power, high light efficiency, feature of long life.
For solving above technical problem, the present invention includes a ceramic arc tube (see figure 5), ceramic arc tube two ends have the ceramic sleeve of support electrode system, the outermost end of electrode system is that niobium silk or niobium sleeve are in order to carry out the air-tightness matched seal with earthenware, be filled with mercury in the ceramic arc tube, metal halide and inert gas, a kind of ceramic gold-halogen lamp electrode special of the present invention's design, its structure is shown as Fig. 2 or Fig. 3, Fig. 2 or Figure 3 shows that the two-part electrode system, the niobium silk or the niobium pipe of described electrode system are connected to the tungsten filament that diameter is narrower than niobium silk or niobium pipe, the tungsten filament end is wound with the spiral electrode that the thoriatde-tungsten wire thinner than tungsten filament is made, and is with the sleeve pipe that low melting point metal zinc (Zn) or tin (Sn) or antimony (Sb) or its alloy or other low melting point materials are made outside the tungsten filament behind niobium silk or niobium pipe.
It is not produce chemical action with tungsten, niobium that described sleeve pipe is selected the requirement of other low melting materials for use, and saturated vapor pressure is lower, and thermal resistance is bigger.
Be with the ceramic collar on the tungsten filament after described sleeve pipe, ceramic ring is arranged in the ceramic sleeve of support electrode near the port.
The characteristics of this kind structure are to make the low melting point sleeve pipe fusion that is enclosed within outside the tungsten filament (two-period form electrode system) in the final stage of making lamp, after niobium, be full of the solid-state of ceramic sleeve or liquid metal encapsulant owing to capillarity forms, be right after at the terminal port of low melting point encapsulant and then seal by ceramic ring 7 near ceramic oversleeve.
Fig. 1 shows this arc tube for ceramic metal halide lamp structure, 8 is arc tube for ceramic metal halide lamp among the figure, this electric arc tube shell detailed structure then shows in Fig. 5, Fig. 7, the 9a that marks among the figure, 9b are the ceramic oversleeve pipe of its two ends support electrode, it is sealing-in niobium silk or niobium pipe that the 10a that marks among the figure, 10b use ceramic scolder, the 1a that marks among the figure, 1b for sealing.As the 3 outer sleeve pipes 6 that are surrounded by low-melting-point metal Zn or the above other material of the tungsten filament behind 5 spiral electrodes that figure is shown in, the 5 tungsten filament heart yearns, ceramic oversleeve proximal port place is then sealed by ceramic ring 7.
Low-melting-point metal when lamp of the present invention is worked in the pottery sleeve is near solid-state (near niobium silk end) formula molten condition (port) (419.5 ℃ of Zn fusing points, 630.5 ℃ of Sb fusing points, 182.5 ℃ of Sn fusing points), liquid metal thermal conductivity very low (for example Zn is 0.59W/cmK) is about 1/3rd of molybdenum, tungsten material, the melted material heat of leading away is less thus, this has not only further improved cold junction temperature, has also reduced pottery--the temperature of-niobium sealing place.The matching problem that does not have the coefficient of expansion between the material of this molten state and tungsten, molybdenum filament or the earthenware, the coefficient of expansion of this type of material is big than pottery in condensation process, but tungsten, Mo are then less than normal, the two difference is with partial offset, on the other hand because this type of low melting material is the soft metal, plasticity is very big, therefore and between pottery the difference of the coefficient of expansion for its deformation absorbs, the stress that can not cause ceramic sleeve with burst.Because this type of low-melting-point metal is full of the oversleeve pipe fully, there is not any slot, metal halide steam is not penetrated into the possibility of sleeve inside, in this than the molybdenum filament spiral of now using in the structure more superior (as previously mentioned, metal halide steam will infiltrate molybdenum spiral slot and condense and wherein cause the early stage drift of lamp parameter).Therefore the lamp life-span will be longer, and colour temperature and color rendering index are more stable.Certainly near low dense some metal lamp is made initial stage pottery sleeve port will with the metal replacement formation halide of metal halide steam in the lamp, and be evaporated to discharge space and participate in Discharge illuminating, metal ingredient in the virgin metal halide that is displaced then forms microalloy with low melting point metal, this alloy deposition is near ceramic ring, cut off contacting of metal halide steam and low melting point metal, all chemical actions are stopped and having entered stable state.Another effect of ceramic ring then is to guarantee that electrode is in the axial location of ceramic oversleeve pipe.
Description of drawings
Fig. 1 is the ceramic gold-halogen lamp structural representation
Fig. 2 is the two-period form structural representation of electrode system of the present invention
Fig. 3 is the two-period form structural representation of electrode system of the present invention
Fig. 4 is the two-period form electrode structure of conventional ceramic gold-halogen lamp
Fig. 5 is an arc tube for ceramic metal halide lamp structural representation of the present invention
Fig. 6 is embodiment of the invention 35W ceramic metal halogen lamp pole physical dimension figure
Fig. 7 is embodiment of the invention 35W ceramic gold-halogen lamp physical dimension figure
Description of reference numerals: niobium silk or niobium pipe 1 (1a, 1b), molybdenum heart yearn 2, tungsten filament 3, molybdenum spiral 4, tungsten filament 5, spiral electrode 5, sleeve pipe 6, ceramic ring 7, ceramic arc tube 8, ceramic oversleeve 9a, 9b, the air-tightness sealing-in is with ceramic scolder 10a, 10b, ceramic gold-halogen lamp shell 11, electric arc tube support 12,13, lamp holder 14, lamp base 15a, 15b, electrode 16a, 16b
Below comprehensive accompanying drawing and implement example the present invention is further described.
Embodiment
Fig. 1 represents the structure of 35W ceramic gold-halogen lamp, and it comprises an envelope of quartz glass 11, ceramic arc tube 8, and electrode 16a, the 16b that the electric arc tube two ends respectively have draws support 12,13, lamp holder 14, two lamp base 15a, 15b.Its ceramic arc tube 8 structures and size as shown in Figure 7, shell two ends are ceramic oversleeve pipe 9a, the 9b of support electrode, there is sealing the outer end of two ceramic oversleeve pipe 9a, 9b with ceramic scolder 10a, 10b.Be filled with mercury, metal halide and inert gas in the electric arc tube.
The shell of described ceramic arc tube 8 is a ceramic material, and the shell of ceramic arc tube 8 is goalpost shape, sphere.Be characterized in two lateral electrodes 16a, 16b near the time wall thickness thicken gradually, improve two end heat insulation effects, improve cold junction temperature, thereby can divide into the shell of haggling over long (bigger) in the situation that does not reduce cold junction temperature, the lengthening anode-cathode distance, reduce operating air pressure, keep the constant but electric arc size that extended of former power, reduced middle part arc region peak value wall load, thereby improved luminous efficiency and prolonged lamp tube service life.
The electrode system of described ceramic gold-halogen lamp adopts two-period form structure as shown in Figure 2, directly weld thin tungsten filament 3 in sealing-in with niobium silk 1 back, the diameter of tungsten filament 3 is thinner than niobium silk 1 diameter, tungsten filament 3 ends are provided with the spiral electrode of being made by thoriatde-tungsten wire 5, and the thoriatde-tungsten wire diameter that is used for spiral electrode 5 is thinner than tungsten filament 3 diameters; Then overlap the sleeve pipe made from by low-melting-point metal zinc (Zn) 6 outside the tungsten filament 3 after being right after niobium silk 1, described sleeve pipe 6 can be made by low melting point metal tin (Sn) or antimony (Sb) or its alloy or other low melting point materials.The requirement of described other low melting materials is not produce chemical action with tungsten, niobium, and saturated vapor pressure is lower, and thermal resistance is bigger.Concrete size then as shown in Figure 6, present embodiment 1 described niobium silk 1 diameter is 0.7mm, tungsten filament 3 diameters are 0.24mm, the thoriatde-tungsten wire diameter that is used for spiral electrode 5 is 0.13mm.
Claims (6)
1. efficient and long life porcelain gold halogen lamp, include a ceramic arc tube (8), ceramic arc tube (8) two ends have the ceramic sleeve (9a of support electrode, 9b), the outermost end of electrode system is that niobium silk or niobium sleeve (1) are in order to carry out the air-tightness matched seal with earthenware, ceramic arc tube is filled with mercury in (8), metal halide and inert gas, it is characterized in that: the niobium silk of described electrode system or niobium pipe (1) are connected to the tungsten filament (3) that diameter is narrower than niobium silk or niobium pipe (1), tungsten filament (3) end is wound with the spiral electrode of making than the thin thoriatde-tungsten wire of tungsten filament (3) (5), is with the sleeve pipe (6) that low-melting-point metal zinc or tin or antimony or its alloy or other low melting materials are made outside the tungsten filament (3) behind niobium silk or niobium pipe (1).
2. a kind of efficient and long life porcelain gold halogen lamp as claimed in claim 1 is characterized in that: be with ceramic ring (7) on described low-melting-point metal sleeve pipe (6) tungsten filament (3) afterwards, ceramic ring (7) is arranged in the ceramic sleeve of support electrode near the port.
3. a kind of efficient and long life porcelain gold halogen lamp as claimed in claim 1 or 2 is characterized in that: it is not produce chemical action with tungsten, niobium that described sleeve pipe (6) is selected the requirement of other low melting materials for use, and saturated vapor pressure is lower, and thermal resistance is bigger.
4. a kind of efficient and long life porcelain gold halogen lamp as claimed in claim 1 or 2 is characterized in that: described ceramic ring (7) is served as reasons and the translucent alumina ceramics or the signle crystal alumina pottery of the same material of ceramic arc tube are made.
5. a kind of efficient and long life porcelain gold halogen lamp as claimed in claim 1 or 2 is characterized in that: described ceramic ring (7) can be selected high-temperature ceramic materials such as titanium oxide, zirconia, carborundum, boron nitride or other any high-temperature ceramic materials manufacturings for use.
6. a kind of efficient and long life porcelain gold halogen lamp as claimed in claim 1 or 2 is characterized in that: a kind of material in refractory metal such as available metal that does not work with metal halide of described ceramic ring (7) such as tungsten, rhodium, molybdenum, tantalum or its alloy is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100358746A CN101086947A (en) | 2006-06-09 | 2006-06-09 | An efficient and long life porcelain gold halogen lamp electrode system |
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| CNA2006100358746A CN101086947A (en) | 2006-06-09 | 2006-06-09 | An efficient and long life porcelain gold halogen lamp electrode system |
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| CN101086947A true CN101086947A (en) | 2007-12-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021788A (en) * | 2012-12-19 | 2013-04-03 | 浙江宇光照明科技有限公司 | Ceramic metal halide lamp electrode |
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2006
- 2006-06-09 CN CNA2006100358746A patent/CN101086947A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021788A (en) * | 2012-12-19 | 2013-04-03 | 浙江宇光照明科技有限公司 | Ceramic metal halide lamp electrode |
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