CN102034673B - Long arc discharge lamp - Google Patents
Long arc discharge lamp Download PDFInfo
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- CN102034673B CN102034673B CN201010299428.2A CN201010299428A CN102034673B CN 102034673 B CN102034673 B CN 102034673B CN 201010299428 A CN201010299428 A CN 201010299428A CN 102034673 B CN102034673 B CN 102034673B
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- lamp
- arc discharge
- long arc
- discharge lamp
- mercury
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Abstract
The invention provides a long arc discharge lamp. A pair of electrodes are oppositely configured in a luminous tube, two ends of which are sealed up by using a foil seal structure so as to achieve the effects of preventing sealed-in materials from intruding sealed-up parts, preventing foil corrosion and inhibiting the leakage of the sealed-in materials from the sealed-up parts. The long arc discharge lamp is characterized in that the potential gradient of the lamp is below 8 V/cm, the input power of the lamp is above 80 W/cm, the emission length is larger than 50 cm, the sealed-in materials are mercury or a combination of metal except mercury and halogen, light with a wavelength shorter than 450 nm is radiated, and the working pressure during the light-up is negative pressure.
Description
Technical field
The present invention relates to long arc discharge lamp, especially relating to inclosure has mercury or mercury metal and halogen in addition, and two ends are by the long arc discharge lamp of paper tinsel seal construction sealing.
Background technology
All the time, enclose the metal have beyond mercury or mercury and halogen long arc discharge lamp, such as metal halide lamp, as the ultraviolet discharge lamp of radiation, be widely used in the sclerosis such as resin, binding agent, ink, photoresist or dry, melting or the purposes of various processing such as soften.
The sealing portion at the luminous tube that this long arc discharge lamp generally consists of quartz glass and two ends thereof forms, and has in this sealing portion and is embedded with metal forming, and the electrode consisting of tungsten is connected in the structure of this metal forming.
Being configured with of sealing portion is various, but is known to the glass component of tabular or flat pattern to be embedded in this sealing portion, utilizes this glass component to carry out the structure of sealing.
In this structure, the sealing portion rear flank end of electrode forms flat, and side is equipped with tabular or flat glass parts in its back-end, and above-mentioned metal forming engages with the top and bottom of the plat part of this electrode, extend top and bottom at glass component, engages in its back-end with outside lead.
The long arc discharge lamp of this structure is disclosed in TOHKEMY 2006-134710 communique, in this lamp, in the inside of above-mentioned luminous tube, enclose rare gas, halogen, mercury, the iron that has scheduled volume, near the ultraviolet ray mainly can illumination wavelength 365nm when lighting a lamp.
And, in this patent documentation, recorded the position that forms path at the metastomium of electrode, with the invention that prevents that halogen from solidifying in sealing portion side.
, in this long arc discharge lamp, as mentioned above, the distance of distance electric arc becomes large near sealing portion, thereby compares with illuminating part, and temperature must step-down and halogen is not easy to gather.And pressure ratio atmospheric pressure when this lamp generally moves is high, above-mentioned halogen easily enters the inside of sealing portion.
The temperature of the molybdenum foil of sealing portion is different and different according to the design of lamp or cooling condition, but be at least more than 500 ℃, become the situation of carrying out of reacting of molybdenum and halogen, the metal forming that the molybdenum of seal member forms is corroded by halogen soon, the interface of the close contact of molybdenum and quartz glass is because high pressure can be peeled off with glass, and so-called " paper tinsel floats " phenomenon of generation.And this paper tinsel floats and further develops, the inclosure logistics finally becoming in lamp goes out (leakage) to outside reason, and produces the inner less desirable phenomenons such as mercury outflow.
The reason of this leakage is mainly that the operating pressure owing to lighting a lamp produces.In this long arc discharge lamp, for luminous length, be lamp more than 50cm, lamp input is more than 80W/cm, therefore becomes at least height more than 4kW input lamp.Therefore, enclose thing and fully evaporate and move while lighting a lamp, its operating pressure is at least more than 1atm, is equivalent to be called as the lamp of so-called high-pressure discharge lamp.In lighting a lamp, in sealing portion, apply all the time this operating pressure in these lamps.
Patent documentation 1: TOHKEMY 2006-134710 communique
Summary of the invention
The present invention is the problem in view of above-mentioned prior art, a kind of pair of electrodes that relatively configures in luminous tube is provided, this luminous tube utilizes paper tinsel seal construction to carry out sealing at two ends, do not have that the halogen of enclosing in luminous tube enters in sealing portion and attack metal paper tinsel, or float and make to enclose thing and flow out to outside long arc discharge lamp because paper tinsel occurs this halogen.
In order to solve above-mentioned problem, in long arc discharge lamp of the present invention, it is characterized in that, electric potential gradient is below 8V/cm, lamp input electric power is more than 80W/cm, and luminous length is more than 50cm, encloses thing and be metal beyond mercury or mercury and the combination of halogen, light below radiation wavelength 450nm, the operating pressure while lighting a lamp becomes negative pressure.
And, and then preferably it is characterized in that, electric potential gradient is below 8V/cm, and the operating pressure while lighting a lamp is, below 50kPa, to it is characterized in that in addition, and above-mentioned paper tinsel seal construction is two paper tinsels.
Invention effect
According to the present invention, though be high input for long arc discharge lamp, but the operating pressure while lighting a lamp becomes the negative pressure of not enough 1atm, thereby the inclosure thing in luminous tube, especially halogen can not invaded to sealing portion, therefore can obtain not can corroding metal paper tinsel, paper tinsel can not occur and float or enclose thing and flow out to outside effect.Consequently can extend the life-span of lamp.
, in order to make operating pressure become negative pressure, must the enclosed volume of mercury etc. be set lessly, electric potential gradient (voltage) is suppressed thus must be lower, and electric current increases.If this lamp current increases, in order to increase the current capacity of molybdenum foil, must increase the thickness of paper tinsel, or increase width.
And, as the method that increases current capacity, also have the method for the sheet number that increases molybdenum foil.Yet the method that increases the sheet number of molybdenum foil increases the welding position of molybdenum foil and electrode, also must put glass component into, and the short space being formed at around electrode can become greatly between molybdenum foil, and halogen is easily invaded to this space, easily causes paper tinsel to float.Therefore, two structures more than paper tinsel are mainly used is not enclosing the xenon lamp of halogen or the extra-high-pressure mercury vapour lamp of short arc, at the lamp of having put into halogen, conventionally with 1 molybdenum foil, carries out sealing.
To this, in the present invention, as mentioned above, luminous tube inside is also negative pressure when lighting a lamp, from comparing with common high-pressure discharge lamp, be not easy to produce in sealing portion the superiority that paper tinsel floats, can adopt two structures more than paper tinsel, can tackle exactly the increase of current capacity.
Accompanying drawing explanation
Fig. 1 is the overall diagram of long arc discharge lamp of the present invention.
Fig. 2 is the part sectioned view of Fig. 1.
Fig. 3 is the various lamps that are made for experiment.
Fig. 4 means the chart of illumination sustainment rate of the various lamps of Fig. 3.
Symbol description
1: long arc discharge lamp
2: luminous tube
3: sealing portion
4: electrode
4a: flat electrode rear end
5: metal forming
6: glass component
7: outside lead
Embodiment
Fig. 1 represents long arc discharge lamp of the present invention, and Fig. 2 is the enlarged drawing of its major part.In the drawings, long arc discharge lamp 1 possesses sealing portion 3 at the two ends of the luminous tube 2 consisting of quartz glass, in this luminous tube 2 across institute's set a distance for example 500mm relatively dispose pair of electrodes 4,4.
In this embodiment, the rear end 4a of the non-emitting space side of above-mentioned electrode 4 forms flat pattern, at square end thereafter, is equipped with and coordinates the shape of this electrode rear end 4a to form the quartz glass parts 6 of flat pattern.
In sealing portion 3, by welding, wait two metal formings 5,5 of the top and bottom of the flat rear end 4a that is engaged in above-mentioned electrode 4 to extend along the top and bottom of glass component 6, at square end thereafter, be connected with outside lead 7.This outside lead 7 protrudes from the outside of luminous tube 2, is connected with not shown supply lines.
In above-mentioned luminous tube 2, enclose and have predetermined rare gas, halogen, mercury, iron, in this embodiment, when lighting a lamp, for example, mainly radiate near the ultraviolet ray of wavelength 365nm.
In addition, inclosure thing is not limited to above-mentioned, so long as A: the metal+B beyond mercury or mercury: the full combination of halogen.
Example as these combinations is as follows.
Hg (mercury)+(I (iodine), Br (bromine))
Zn (zinc)+(I, Br)
Zn+FeI
2(ferric iodide)
·Hg+FeI
2
Metal α (Bi (bismuth), Sb (antimony))+(I, Br)
These luminescent substances so that the mode that the electric potential gradient of lamp becomes below 8V/cm enclose.
And, as in order to promote the rare gas of startability, for example, enclose and have xenon.
Also have, the luminous length being determined by interelectrode distance is more than 500mm, and lamp input electric power is more than 80W/cm.
Enclose the ultraviolet ray that the lamp of above-mentioned luminescent substance mainly radiates wavelength 340～450nm, as its purposes, such as the sclerosis for resin, binding agent, ink, photoresist or dry, melting or the various processing such as softening.
For embodiment, be shown in following.
Fig. 3 represents to be made for the various long arc discharge lamps of experiment, and each lamp is that the shape, size, sealing cage structure, luminous length of luminous tube etc. is identical, but the voltage when enclosing thing and lighting a lamp, the lamp that operating pressure is not identical.
Lamp shown in embodiment 1 be the internal diameter that uses middle body for 22mm, internal volume be 400cm
3luminous tube, the inclosure of mercury 130mg, iodate mercury 10mg and xenon-133 gas of take is pressed as the mode of 8kPa and is enclosed, with the discharge lamp of the interelectrode distance configured electrodes 4 of 1000mm, rated power is 16000W, modulating voltage is 795V.
Lamp shown in embodiment 2 is internal diameter, the internal volume luminous tube identical with the lamp of embodiment 1 that uses middle body, the inclosure of mercury 73mg, iodate mercury 2mg and xenon-133 gas of take is pressed as the mode of 4kPa and is enclosed, with the embodiment 1 same nominal power lamp that is 16000W, but modulating voltage is 585V.
Lamp shown in conventional example is internal diameter, the internal volume luminous tube identical with the lamp of embodiment 1 that uses middle body, the inclosure of mercury 825mg, iodate mercury 2mg and xenon-133 gas of take is pressed as the mode of 4kPa and is enclosed, with the embodiment 1 same nominal power lamp that is 16000W, but modulating voltage is 1357V.
And the electric potential gradient of the lamp of above-mentioned conventional example is 13.6 (V/cm), on the other hand, in the lamp of embodiments of the invention 1, electric potential gradient is 7.95 (V/cm), is 5.85 (V/cm) in the lamp of embodiment 2, less.
While verifying the operating pressure of each lamp therewith relevantly, each pressure of mercury, iodine and the xenon of the average gas temperature that " equation of state of gas ": the P=nRT/V of take obtains lamp inside during as 2000K, added up in the hope of operating pressure, wherein P: operating pressure, n: molal quantity, R: gas constant, T: absolute temperature=average gas temperature, V: lamp internal volume.
The operating pressure of trying to achieve is like this 1.90 (atm) in the prior embodiment, on the other hand, embodiments of the invention 1 are 0.81 (atm), at embodiment 2, are 0.41 (atm), known in arbitrary lamp of the present invention lamp inside at the state of lighting a lamp, all become negative pressure.
Fig. 4 is the life-span point lantern test that carries out above-mentioned each lamp, the chart indicating for illumination sustainment rate.The longitudinal axis is the illumination sustainment rate (%) with respect to initial illumination, and transverse axis is the elapsed time of lighting a lamp.
By experimental result, each lamp, along with the process of the time of lighting a lamp, has roughly similarly reduced illumination in the identical time of lighting a lamp.Yet first, the lamp of conventional example produced and leaks from sealing portion near the 4500 hours time of lighting a lamp, but embodiment the 1, the 2nd maintains and lights a lamp when reducing illumination thereafter.Especially embodiment 2 is within 8000 hours, also maintaining and light a lamp.Can work out in the lamp of embodiment 2, the interior pressure of the lamp while lighting a lamp is lower, thereby the development that paper tinsel floats latens.And, when leaking, roughly side by side there is atmosphere to flow to lamp inside with leakage, cannot light a lamp, almost do not find to enclose thing to outside outflow.
These are problems of the operating pressure while resulting from the lighting a lamp of lamp of enclosing halogen, and have or not mercury irrelevant, even also can see same tendency while putting halogen and metal into.
As mentioned above, even in thering is the lamp of identical luminous tube shape, sealing cage structure, with respect to the operating pressure in luminous tube, it is existing lamp more than atmospheric pressure, in operating pressure, become in the lamp of the present invention that is less than atmospheric negative pressure, can suppress for a long time to enclose material in the generation of the leakage of sealing portion, can access significantly long lifetime.
Claims (3)
1. a long arc discharge lamp relatively disposes pair of electrodes in luminous tube, and this luminous tube utilizes paper tinsel seal construction to carry out sealing at two ends, it is characterized in that,
Electric potential gradient is below 8V/cm, and lamp input electric power is more than 80W/cm, and luminous length is more than 50cm, and enclosing thing is the metal and the combination of halogen beyond mercury and/or mercury, radiates the light below wavelength 450nm, and the operating pressure while lighting a lamp is negative pressure.
2. long arc discharge lamp according to claim 1, is characterized in that, operating pressure during above-mentioned lighting a lamp is below 50kPa.
3. long arc discharge lamp according to claim 1, is characterized in that, above-mentioned paper tinsel seal construction is two paper tinsels.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-223689 | 2009-09-29 | ||
| JP2009223689A JP5347875B2 (en) | 2009-09-29 | 2009-09-29 | Long arc type discharge lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102034673A CN102034673A (en) | 2011-04-27 |
| CN102034673B true CN102034673B (en) | 2014-08-27 |
Family
ID=43887397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010299428.2A Active CN102034673B (en) | 2009-09-29 | 2010-09-27 | Long arc discharge lamp |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5347875B2 (en) |
| KR (1) | KR101313456B1 (en) |
| CN (1) | CN102034673B (en) |
| TW (1) | TWI466166B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6086253B2 (en) * | 2014-08-28 | 2017-03-01 | ウシオ電機株式会社 | Long arc type discharge lamp |
| CN105140096A (en) * | 2015-07-31 | 2015-12-09 | 徐琴玉 | Xenon long-arc lamp with flexible leads |
| KR102442405B1 (en) * | 2018-11-07 | 2022-09-13 | 우시오덴키 가부시키가이샤 | Long arc type discharge lamp |
Family Cites Families (18)
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| JPS5225486A (en) * | 1975-08-21 | 1977-02-25 | Mitsubishi Electric Corp | Mercury arc lamp for photochemical reaction |
| US4074166A (en) * | 1976-11-19 | 1978-02-14 | Gte Sylvania Incorporated | Ultraviolet emitting arc discharge lamp |
| JPS62281249A (en) * | 1986-05-30 | 1987-12-07 | Toshiba Corp | Superoutput bactericidal lamp |
| JPH0732000B2 (en) * | 1987-02-09 | 1995-04-10 | ウシオ電機株式会社 | Metal vapor discharge lamp |
| JPH0224955A (en) * | 1988-07-12 | 1990-01-26 | Orc Mfg Co Ltd | Arc lamp |
| JPH0485647U (en) * | 1990-11-30 | 1992-07-24 | ||
| JPH05258718A (en) * | 1992-03-09 | 1993-10-08 | Iwasaki Electric Co Ltd | Metal vapor discharge lamp for high-load ultraviolet ray |
| JP2977696B2 (en) * | 1993-03-17 | 1999-11-15 | ウシオ電機株式会社 | Light source device using metal vapor discharge lamp |
| JPH07245081A (en) * | 1994-03-04 | 1995-09-19 | Iwasaki Electric Co Ltd | Ultraviolet ray setting lamp |
| JPH07326323A (en) * | 1994-05-31 | 1995-12-12 | Iwasaki Electric Co Ltd | Metallic vapor discharge lamp |
| JPH08273594A (en) * | 1995-03-30 | 1996-10-18 | Toray Ind Inc | Light-emitting tube, multiple tube type discharge lamp, and photochemical reaction device |
| JPH09283080A (en) * | 1996-04-16 | 1997-10-31 | Japan Storage Battery Co Ltd | Ultraviolet radiating metal halide lamp |
| JP2004247497A (en) * | 2003-02-13 | 2004-09-02 | Univ Saitama | Plasma generation system, plasma processing system, plasma generating method and plasma processing process |
| JP2006134710A (en) * | 2004-11-05 | 2006-05-25 | Ushio Inc | Metal halide lamp |
| JP5069493B2 (en) * | 2006-11-02 | 2012-11-07 | ハリソン東芝ライティング株式会社 | UV discharge lamp |
| JP5266871B2 (en) * | 2007-10-22 | 2013-08-21 | ウシオ電機株式会社 | Long arc discharge lamp and ultraviolet irradiator with long arc discharge lamp |
| DE102008013607B3 (en) * | 2008-03-11 | 2010-02-04 | Blv Licht- Und Vakuumtechnik Gmbh | Mercury-free metal halide high pressure discharge lamp |
| JP5217021B2 (en) * | 2008-05-21 | 2013-06-19 | ハリソン東芝ライティング株式会社 | Metal halide lamp |
-
2009
- 2009-09-29 JP JP2009223689A patent/JP5347875B2/en active Active
-
2010
- 2010-07-30 TW TW099125416A patent/TWI466166B/en active
- 2010-09-06 KR KR1020100086979A patent/KR101313456B1/en active IP Right Grant
- 2010-09-27 CN CN201010299428.2A patent/CN102034673B/en active Active
Non-Patent Citations (3)
| Title |
|---|
| JP特开2006-134710A 2006.05.25 |
| JP特开平6-275235A 1994.09.30 |
| JP特开平8-273594A 1996.10.18 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20110035878A (en) | 2011-04-06 |
| JP2011076724A (en) | 2011-04-14 |
| TWI466166B (en) | 2014-12-21 |
| KR101313456B1 (en) | 2013-10-01 |
| TW201112308A (en) | 2011-04-01 |
| JP5347875B2 (en) | 2013-11-20 |
| CN102034673A (en) | 2011-04-27 |
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