CN102290321A - Electrode assembly special for ceramic metal halide lamp - Google Patents
Electrode assembly special for ceramic metal halide lamp Download PDFInfo
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- CN102290321A CN102290321A CN2011102191353A CN201110219135A CN102290321A CN 102290321 A CN102290321 A CN 102290321A CN 2011102191353 A CN2011102191353 A CN 2011102191353A CN 201110219135 A CN201110219135 A CN 201110219135A CN 102290321 A CN102290321 A CN 102290321A
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Abstract
The invention discloses an electrode assembly special for a ceramic metal halide lamp. The electrode assembly comprises a metal rod used for feeding, a metal ceramic rod and a tungsten electrode rod which are on the same axis; the end part of the tungsten electrode rod is provided with a tungsten ring; the metal ceramic rod comprises a metal ceramic rod A and a metal ceramic rod B; the diameter of the metal ceramic rod B is slightly greater than that of the metal ceramic rod A and is matched with the inner diameter of a tail tube of a discharging cavity of the ceramic metal halide lamp; a small gap is formed between the metal ceramic rod B and the tail tube of the discharging cavity of the ceramic metal halide lamp; the end part of the metal ceramic rod A is connected with the metal rod used for feeding; and the end part of the metal ceramic rod B is connected with the tungsten electrode rod. The electrode assembly is simple is structure, high in operation reliability and long in service life.
Description
Technical field
The present invention relates to a kind of ceramic metal helide lamp assembly, particularly a kind of ceramic metal helide lamp special electrode component.
Background technology
Patent CN200810163614.6 and CN200820171304.4 have described a kind of ceramic metal halide special electrode component, it is characterized in that having adopted in the electrode assemblie cermet rod, concrete structure is that an end of cermet rod is connected with the Metallic rod that is used as feed, the other end is connected with the tungsten electrode bar that is used as the electrical discharge arc terminal, or between tungsten electrode bar and cermet rod, establish the tungsten bar, and be wound with the molybdenum circle in the tungsten bar outside.This molybdenum circle needs obtain conduction heat and expand from the tungsten bar of energising, but this expansion can not make the molybdenum circle touch ceramic inner wall of liner, otherwise tail pipe breaks and promptly cause the gas leakage of lamp, makes the end-of-life of lamp; This expansion can not make the gap between molybdenum circle and the ceramic inner wall of liner too big again,, metal halide steam is condensate in the sealing-in district of electrode otherwise can seeing through this gap, cause the decline of luminous efficiency and the variation of colour temperature, rare earth element under the serious situation in the metal halide steam can corrode sealing-in district material, cause the gas leakage of sealing-in district, make the end-of-life of lamp.Therefore, under the situation that adopts the molybdenum coil structures, the clearance control between molybdenum circle and the ceramic discharge chamber tail pipe internal diameter will directly influence the useful life of lamp.
Summary of the invention
Technical problem to be solved by this invention provides a kind of ceramic metal helide lamp special electrode component, and simple in structure, operating reliability is strong, long service life.
The present invention's technical scheme that adopts of dealing with problems is: a kind of ceramic metal helide lamp special electrode component, comprise Metallic rod as feed, cermet rod and tungsten electrode bar, and the three is on the same axis, the end of described tungsten electrode bar is the tungsten circle, described cermet rod comprises cermet rod A and cermet rod B, the slightly larger in diameter of described cermet rod B is in the diameter of cermet rod A, and be complementary with the discharge cavity tail pipe internal diameter of ceramic metal helide lamp, and described cermet rod B and and the discharge cavity tail pipe of ceramic metal helide lamp between minim gap is only arranged, the end of described cermet rod A is connected with the Metallic rod that is used as feed, and the end of described cermet rod B is connected with the tungsten electrode bar.
As further improvement, the gap between described cermet rod B and the ceramic metal helide lamp discharge cavity tail pipe is 0.10～0.30 ㎜, and corresponding with the power of lamp.
As further improvement, the end of described cermet rod B is round table-like, and its end face diameter is identical with the diameter of tungsten electrode bar.
As further improvement, the length of described cermet rod A is between 20 ﹪～85 ﹪ of cermet rod length overall.
The present invention is applicable to the manufacturing of the various power ceramic metal helide lamps of 10W～1000W.The material of cermet rod of the present invention is made up of aluminium oxide and molybdenum.
The invention has the beneficial effects as follows: in electrode assemblie, added the coefficient of expansion cermet rod close with transparent alumina ceramics discharge cavity material, and be arranged to the cermet rod A and the cermet rod B of different-diameter, the transparent alumina ceramics discharge cavity tail pipe internal diameter of the diameter of cermet rod B and ceramic metal helide lamp is complementary, when cermet rod B is inserted the transparent alumina ceramics discharge cavity tail pipe of ceramic metal helide lamp, minim gap is only arranged between the two, both reached the function that original molybdenum circle stops metal halide steam to enter electrode sealing-in district, the molybdenum loop material that has prevented to have the bigger coefficient of expansion is again burst the possibility of ceramic tail pipe, the actual life of having improved lamp greatly.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Fig. 2 is the partial schematic diagram of the 70W ceramic metal helide lamp of the present invention's making.
The present invention will be further described below in conjunction with accompanying drawing.
Embodiment
Embodiment 1: a kind of ceramic metal helide lamp special electrode component, as shown in Figure 1, comprise niobium bar 1, cermet rod and tungsten electrode bar 4 as feed, and the three is on the same axis, in the end of tungsten electrode bar 4 is tungsten circle 5, this cermet rod comprises cermet rod A2 and cermet rod B3, and the length of cermet rod A2 accounts between 20 ﹪ of cermet rod length overall, and the end of cermet rod A2 is integral by laser welding with niobium bar 1 as feed; The slightly larger in diameter of cermet rod B3 is in the diameter of cermet rod A2, and is complementary with the transparent alumina ceramics discharge cavity tail pipe internal diameter of ceramic metal helide lamp, and maximal clearance between the two is between 0.1 ㎜, and corresponding with the power of lamp.The end of cermet rod B3 is set to round table-like, and the diameter of its end face diameter and tungsten electrode bar 4 is identical and be integral by laser welding with tungsten electrode bar 4.
Embodiment 2: the length of cermet rod A2 accounts for the cermet rod length overall
30 ﹪, the maximal clearance between the transparent alumina ceramics discharge cavity tail pipe of cermet rod B3 and ceramic metal helide lamp is 0.1mm; All the other are identical with embodiment 1.
Embodiment 3: the length of cermet rod A2 accounts for the cermet rod length overall
45 ﹪, the maximal clearance between the transparent alumina ceramics discharge cavity tail pipe of cermet rod B3 and ceramic metal helide lamp is 0.2mm; All the other are identical with embodiment 1.
Embodiment 4: the length of cermet rod A2 accounts for the cermet rod length overall
60 ﹪, the maximal clearance between the transparent alumina ceramics discharge cavity tail pipe of cermet rod B3 and ceramic metal helide lamp is 0.2mm; All the other are identical with embodiment 1.
Embodiment 5: the length of cermet rod A2 accounts for the cermet rod length overall
75 ﹪, the maximal clearance between the transparent alumina ceramics discharge cavity tail pipe of cermet rod B3 and ceramic metal helide lamp is 0.2mm; All the other are identical with embodiment 1.
Embodiment 6: the length of cermet rod A2 accounts for the cermet rod length overall
85 ﹪, the maximal clearance between the transparent alumina ceramics discharge cavity tail pipe of cermet rod B3 and ceramic metal helide lamp is 0.3mm; All the other are identical with embodiment 1.
Embodiment 7: as shown in Figure 2, the 70W ceramic metal helide lamp that adopts the present invention to make comprises special electrode component (as shown in Figure 1), and the diameter of niobium bar 1 is 0.64 ± 0.01 ㎜, and the degree of depth of inserting ceramic discharge chamber tail pipe is 3.2 ± 0.1 ㎜; The diameter of cermet rod A2 is 0.64 ± 0.01 ㎜, length 7.0 ± 0.1 ㎜; The diameter of cermet rod B3 is 0.70 ± 0.05 ㎜, and length is 2.5 ± 0.1 ㎜; The diameter of tungsten electrode bar 4 is 0.29 ± 0.01 ㎜, and length is 3.1 ± 0.1 ㎜; Be wound with the tungsten filament that diameter is 0.16 ± 0.01 ㎜ in the end of tungsten electrode bar 4, claim tungsten circle 5.The internal diameter of transparent alumina ceramics discharge cavity tail pipe 7 is 0.75 ± 0.05 ㎜, and the length of tail pipe is 13.3 ± 0.1 ㎜.With glass solder 6 the present invention is sealed in the transparent alumina ceramics discharge cavity tail pipe 7, glass solder 6 length are 6.5 ㎜.Gap between cermet rod B3 and transparent alumina ceramics discharge cavity tail pipe 7 internal diameters is 0.10 ㎜.
After tested, compare with the lamp of the same race of same employing molybdenum coil structures, the light sustainment rate that its light efficiency improved under 33.1%, 2000 hour improves 32.8%, 100 test lamp was not seen a generation sealing-in district cracking after 6000 hours phenomenon.
Claims (4)
1. ceramic metal helide lamp special electrode component, comprise Metallic rod (1) as feed, cermet rod and tungsten electrode bar (4), and the three is on the same axis, the end of described tungsten electrode bar (4) is tungsten circle (5), it is characterized in that: described cermet rod comprises cermet rod A (2) and cermet rod B (3), the slightly larger in diameter of described cermet rod B (3) is in the diameter of cermet rod A (2), and be complementary with the discharge cavity tail pipe internal diameter of ceramic metal helide lamp, and described cermet rod B (3) and and the discharge cavity tail pipe of ceramic metal helide lamp between minim gap is only arranged, the end of described cermet rod A (2) is connected with the Metallic rod (1) that is used as feed, and the end of described cermet rod B (3) is connected with tungsten electrode bar (4).
2. ceramic metal helide lamp special electrode component as claimed in claim 1 is characterized in that: the gap between described cermet rod B (3) and the ceramic metal helide lamp discharge cavity tail pipe is 0.10～0.30 ㎜, and corresponding with the power of lamp.
3. ceramic metal helide lamp special electrode component as claimed in claim 1 is characterized in that: the end of described cermet rod B (3) is round table-like, and its end face diameter is identical with the diameter of tungsten electrode bar (4).
4. ceramic metal helide lamp special electrode component as claimed in claim 1 is characterized in that: the length of described cermet rod A (2) is between 20 ﹪ of cermet rod length overall～85 ﹪.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102191353A CN102290321A (en) | 2011-08-02 | 2011-08-02 | Electrode assembly special for ceramic metal halide lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102191353A CN102290321A (en) | 2011-08-02 | 2011-08-02 | Electrode assembly special for ceramic metal halide lamp |
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| CN102290321A true CN102290321A (en) | 2011-12-21 |
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| CN2011102191353A Pending CN102290321A (en) | 2011-08-02 | 2011-08-02 | Electrode assembly special for ceramic metal halide lamp |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623277A (en) * | 2012-04-14 | 2012-08-01 | 朱惠冲 | Ceramic metal halide electrode melt-sealing positioning method and structure |
| CN104183458A (en) * | 2013-05-28 | 2014-12-03 | 海洋王照明科技股份有限公司 | Ceramic halogen lamp electrode and ceramic halogen lamp |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4806828A (en) * | 1986-07-02 | 1989-02-21 | Thorn Emi Plc | High pressure sodium discharge lamps with hydrogen getter |
| DE20210400U1 (en) * | 2002-07-04 | 2003-11-13 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Electrode system for metal halide lamp comprises electrically conducting bushing and electrode having unit for interlocking within connecting region consisting of recess in shaft of electrode |
| CN101901735A (en) * | 2010-07-26 | 2010-12-01 | 潮州市晨歌电光源有限公司 | Electrode assembly |
| CN202126989U (en) * | 2011-08-02 | 2012-01-25 | 海宁新光阳光电有限公司 | Dedicated electrode component for ceramic metal halide lamp |
-
2011
- 2011-08-02 CN CN2011102191353A patent/CN102290321A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4806828A (en) * | 1986-07-02 | 1989-02-21 | Thorn Emi Plc | High pressure sodium discharge lamps with hydrogen getter |
| DE20210400U1 (en) * | 2002-07-04 | 2003-11-13 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Electrode system for metal halide lamp comprises electrically conducting bushing and electrode having unit for interlocking within connecting region consisting of recess in shaft of electrode |
| CN101901735A (en) * | 2010-07-26 | 2010-12-01 | 潮州市晨歌电光源有限公司 | Electrode assembly |
| CN202126989U (en) * | 2011-08-02 | 2012-01-25 | 海宁新光阳光电有限公司 | Dedicated electrode component for ceramic metal halide lamp |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623277A (en) * | 2012-04-14 | 2012-08-01 | 朱惠冲 | Ceramic metal halide electrode melt-sealing positioning method and structure |
| CN102623277B (en) * | 2012-04-14 | 2016-03-09 | 朱惠冲 | Ceramic metal halogen lamp pole sealing by fusing location structure |
| CN104183458A (en) * | 2013-05-28 | 2014-12-03 | 海洋王照明科技股份有限公司 | Ceramic halogen lamp electrode and ceramic halogen lamp |
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Application publication date: 20111221 |