CN109390208A - Short arc discharge lamp - Google Patents
Short arc discharge lamp Download PDFInfo
- Publication number
- CN109390208A CN109390208A CN201810881849.2A CN201810881849A CN109390208A CN 109390208 A CN109390208 A CN 109390208A CN 201810881849 A CN201810881849 A CN 201810881849A CN 109390208 A CN109390208 A CN 109390208A
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- CN
- China
- Prior art keywords
- luminous tube
- discharge lamp
- arc discharge
- short arc
- guide member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/073—Main electrodes for high-pressure discharge lamps
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- Discharge Lamp (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
The present invention provides a kind of short arc discharge lamp, a pair of of cathode and anode are configured opposite to each other in the inside of luminous tube, and it is vertically lighted, wherein, prevent from luminous tube electrode or the melanism object such as the metal of evaporations such as electrode core wire be lit when convection gas convey and be attached to luminous tube inner wall and melanism, and mercury caused by preventing the temperature in the upper area by luminous tube from declining does not evaporate, and illumination sustainment rate is high in a long time.The short arc discharge lamp is characterized in that, there is the convection current guide member of the through hole of tube axial direction in the top setting of the electrode of the top position in the luminous tube, by make a part of the convection gas in luminous tube prevented in a manner of luminous tube upper area temperature decline.
Description
Technical field
The present invention relates to a kind of short arc discharge lamps, more particularly, to the short arc discharge lamp vertically lighted.
Background technique
In the past, in the short arc discharge lamp of high input high brightness, a pair of electrodes that will be configured in opposite directions is used vertically to match more
The vertical lighting mode set and lighted.
In addition, the short arc discharge lamp that is configured in opposite directions in the luminous tube for being sealed with mercury of a pair of cathode and anode due to
Close to point light source, therefore by the light source utilization as the higher exposure device of light gathering efficiency and being combined with optical system.
In addition, the short arc discharge lamp for being sealed with xenon in luminous tube is used as digital movie with light source.
In such short arc discharge lamp, it is known to since the thermic load for acting on anode when lighting is higher,
Generate the electrode material as caused by overheat of anode etc. evaporation, generate the evaporant be attached to luminous tube inner wall and light transmittance
The so-called melanism of decline.Such melanism object be lit in gas convection current carry, the top easy to attach in luminous tube
Near.
As the method for capturing the melanism object as caused by the evaporation of such electrode material from convection gas, Japanese special
Open disclosed in 2005-340136 bulletin (patent document 1) the electrode (anode) being located above top setting it is disk-shaped
Component.
Fig. 6 indicates the construction, and a pair of of cathode 103 and anode 104 are opposite in the luminous tube 102 of short arc discharge lamp 101
Configuration, the lamp 101 make anode 104 be located above and vertically light.On anode 104 above, it is equipped on its core wire 104a
Disk-like member 110.
As shown in fig. 6, in lamp is lighted, generate the convection current X of the gas as caused by arc light in luminous tube 102, but with sun
The disk-like member 110 of 104 top of pole collides, and flows along the inner wall of luminous tube 102.Flowing to the top of anode 104
It is collided with disk-like member 110, therefore the melanism object in convection gas is attached to the disk-like member 110 and anode during this period
Core wire 104a.Include hardly as a result, melanism object in the convection current of the inner wall flowing along luminous tube 102, is able to suppress luminous
The melanism of pipe 102.
It is well known, however, that rising around anode 104 when setting disk-like member 110 as described in Patent Document 1
Convection gas X is prevented by the disk-like member 110, will not flow to the upper end inside luminous tube 102, exist in this region
It leads to the problem of not evaporating for mercury and desired lamp service life (illumination sustainment rate) cannot be obtained.
Existing technical literature
Patent document 1: Japanese Unexamined Patent Publication 2005-340136 bulletin
Summary of the invention
Problem to be solved by the invention
The present invention puts in view of the above-mentioned problems of the prior art and makes, and its purpose is to provide a kind of short arc discharge lamps
Construction configures a pair of of cathode and anode in the inside of luminous tube opposite to each other, and is vertically lighted, wherein prevents from electrode or core
The convection gas that the metal etc. of the evaporations such as line is generated in luminous tube convey and be attached to luminous tube tube wall and melanism, and
The convection gas in luminous tube is set to flow to the upper end of luminous tube to inhibit not evaporating for mercury.
Technical teaching for solving the problem was
To solve the above-mentioned problems, in the present invention, which is characterized in that be arranged in the top of the electrode in top position
Convection current guide member is formed with the through hole of tube axial direction on the convection current guide member.
In addition, which is characterized in that above-mentioned convection current guide member is circular plate shape.
In addition, which is characterized in that above-mentioned through hole is equally spacedly arranged on the same circumference centered on pipe axis.
In addition, which is characterized in that be equipped with what diameter was reduced towards rear in the rear end of the electrode in above-mentioned top position
Rake.
In addition, which is characterized in that above-mentioned openings are located at when from tube axial direction than extending obtained by above-mentioned rake
The imaginary line arrived leans on the position of outward side.
Invention effect
According to the present invention, there is the convection current guide member of through hole, hair by the top setting of the electrode of position above
Convection gas in light pipe flow to the upper end of luminous tube by the through hole of the convection current guide member, will not be in the region
Temperature is caused to reduce, so as to inhibit not evaporating for mercury.In addition, generating the gas to turn back downwards from convection current guide member
Flowing, so that the case where generating upset in convection gas in luminous tube is reduced, the fluctuating of arc light is reduced, and is steadily maintained
It lights.In addition, the melanism object in the convection gas flowed upwards is attached to the convection current guide member and electrode core wire, also adhere to
It in the inner surface of through hole, is removed from convection gas, melanism object can be prevented to be attached to luminous inside pipe wall.
In addition, be arranged the rake that diameter reduces by the rear end of electrode above, convection gas by the rake at
To effectively flow through the through hole of convection current guide member along the air-flow of electrode cores line side, it can further inhibit luminous
The mercury of the upper end of pipe does not evaporate.
Detailed description of the invention
Fig. 1 is the cross-sectional view of short arc discharge lamp of the invention.
Fig. 2 (A) is the enlarged partial sectional view of Fig. 1, and Fig. 2 (B) is the top view of convection current guide member.
Fig. 3 is the other embodiments of the through hole in convection current guide member.
Fig. 4 is the movement figure of the convection current of the gas in luminous tube.
Fig. 5 is the curve graph for indicating effect relevant to illumination sustainment rate of the invention.
Fig. 6 is the cross-sectional view of previous example.
Specific embodiment
Fig. 1 shows the short arc discharge lamp 1 vertically lighted of the invention, cathode 3 is matched in luminous tube 2 in opposite directions with anode 4
It sets, the core wire 5 of cathode 3 and the core wire 6 of anode 4 are sealed in respectively in sealing 7,8.
The electrode being located above when lighting is equipped with convection current guide member 10 in this embodiment for the top of anode 4.
The convection current guide member 10 is made of disk-like member, is installed on the core wire 6 of anode 4 by installing component 9.And
And the through hole 11 of multiple tube axial directions is formed on the convection current guide member 10.
Fig. 2 indicates the details of convection current guide member 10, as shown in Fig. 2 (B), in the disk-shaped convection current guide member
On 10, centered on pipe axis (central axis of the central axis of luminous tube 2, i.e. cathode 3, anode 4) Y on the same circumference equally spacedly
It is formed with multiple through holes 11.Indicate that there are six through holes 11 for formation in this embodiment, which can be according to convection current guide member 10
Size (diameter) and through hole 11 opening diameter etc. and properly select.
On the other hand, the rake 4a that diameter is reduced towards rear (top) is equipped in the rear end of anode 4.Reducing diameter part 4a
Typically formed by conical section.
Also, the through hole 11 of above-mentioned convection current guide member 10 is preferably set as being located at from the direction of pipe axis Y
When than extending the imaginary line L obtained position by outward side (upper side) above-mentioned rake 4a.
In addition, the shape of through hole 11 not only can be circle shown in Fig. 2 (B), it can also be as shown in Figure 3, be
The long hole shape of the multiple slit-shapeds circumferentially extended.
Based on Fig. 4, illustrate the convection current of the gas in luminous tube 2 of the invention below.
In luminous tube 2, by the warmed-up gas X of arc light between cathode 3 and anode 4 in a manner of along anode 4
Rise in luminous tube 2, and reaches convection current guide member 10.Here, part of it X1 overturning is flowed and along in luminous tube 2
The mode of wall surface flows downwards.
In addition, through hole 11 is formed on convection current guide member 10, so a part of X2 of convection gas X is passed through across this
Through-hole 11 and flow to the upper end in luminous tube 2.
At this moment, the position of through hole 11 is located at rake 4a when from the direction of pipe axis Y than extending 4 rear end of anode
Obtained imaginary line L leans on the position of outward side (upper side), and a part of X2 of the convection gas X thus risen is easy more smooth
Ground flows into through hole 11.
In this way, using the entire upper area for heating luminous tube 2 by the gas X2 of convection current guide member 10, it will not
Most cold spot is formed, can inhibit not evaporating for mercury.In addition, by the gas X1 to turn back downwards from convection current guide member 10,
The case where upset is generated in convection gas in luminous tube 2 is reduced, and the fluctuation of arc light is reduced, and is steadily maintaininged lights.
Also, during this period, the melanism object in convection gas X and anode core wire 6 or the collision of convection current guide member 10 and it is attached
, it is furthermore also attached to the inner surface of through hole 11, and removed from convection gas.
One specification example of following presentation short arc discharge lamp of the invention.
<embodiment>
Input: specified input 12kW, rated current 100A
Light posture: vertically lighting above anode
Cathode:
Cathode material: thorium tungsten
Cathode size:Overall length 30mm
Cathode core wire:
Anode:
Anode material: tungsten
Anode dimension:Overall length 50mm
Front end diameter: 8mm
Front end cone angle: 120 °
Rear end cone angle: 90 °
The diameter of rear end: 25mm
Anode core wire:
In anode body portion, laser groove
Interpolar: 11mm
Convection current guide member:
Material: tungsten
Shape: there are six through holes on plectane
The size of plectane:Thickness 2mm
The configuration of through hole:Circumference on (60 °) of same spacing configure six
Fixed position: rear (top) 20mm of anode rear end
Fixing means: it is clamped with tungsten coil from upper and lower
<comparative example>
In construction shown in Fig. 6, hole is had no through on disk-like member.In addition to this specification and embodiment phase
Together.
Illumination sustainment rate is determined to the lamp of embodiment and comparative example.Its result is as shown in Figure 5.
It knows in a comparative example, 76% or so of initial illumination to be reduced under 1000 hours lighting times, in contrast,
The 93% of initial illumination is maintained in an embodiment of the present invention.
In short arc discharge lamp of the invention, such as above-mentioned the reasons why improving illumination sustainment rate, is presumed as follows.
In the short arc discharge lamp of embodiment, do not have to generate not evaporating for mercury in the upper area of luminous tube, because
This will not evaporate and condense repeatedly in the region, mercury.The evaporation of the mercury, condensation circulation keep arc light unstable, can promote electricity
The evaporation and loss of pole, but this phenomenon will not be generated in the short arc discharge lamp of embodiment.As a result, with comparative example phase
Than the illumination sustainment rate of the short arc discharge lamp of embodiment elapses well.
In addition, in the above description, the case where being in the vertical lighting mode of top position to anode, is illustrated,
It but may be the vertical lighting mode that cathode is in top position, in this case, convection current guide member is mounted in upper
The top for the cathode that orientation is set.
In addition, being set as vertically lighting, but it is lighted posture and is not limited only to strictly from the horizontal by 90 °, as long as substantially
For the lighting mode of 90 ° (vertical).
As above, according to the present invention, in the short arc discharge lamp vertically lighted, by the upper position in luminous tube
The top setting for the electrode set has the convection current guide member of axial through hole, and by one of the convection gas in luminous tube
Lease making is crossed the through hole and is guided upwards, and therefore, the temperature of the upper end in luminous tube is maintained as the condition of high temperature, not will form
Most cold spot can inhibit not evaporating for the mercury in the region.
In addition, generate the flowing of gas turned back downwards from convection current guide member, thus in luminous tube to gas
The case where upset is generated in body is reduced, and the fluctuating of arc light is reduced, and is maintained and is steadily lighted.
In addition, include the melanism object and upper electrode in convection gas core wire and convection current guide member collision and it is attached
, in addition, being attached to its inner surface during through through hole, thus it is removed from convection gas.
Also, rake is formed by the rear end of electrode above, and by the position of the through hole of convection current guide member
The extended line than the rake is arranged to by outward side, is swimmingly imported along the convection gas that upper electrode rises as a result,
The through hole of convection current guide member.
Description of symbols
1: short arc discharge lamp
2: luminous tube
3: cathode
4: anode
4a: rake
5: cathode core wire
6: anode core wire
7,8: sealing
9: installing component
10: convection current guide member
11: through hole
X: convection gas
X1: a part of convection gas
X2: rising a part of convection gas
Y: pipe axis center (electrode axis center)
L: the extended line of rake
Claims (5)
1. a kind of short arc discharge lamp is configured with a pair of of cathode and anode in the inside of luminous tube opposite to each other, and is vertically lighted,
The short arc discharge lamp is characterized in that
In the top of the electrode in top position, convection current guide member is set,
The through hole of tube axial direction is formed on the convection current guide member.
2. short arc discharge lamp according to claim 1, which is characterized in that
The convection current guide member is circular plate shape.
3. short arc discharge lamp according to claim 1, which is characterized in that
The openings are equally spacedly arranged on the same circumference centered on pipe axis.
4. short arc discharge lamp according to claim 1, which is characterized in that
The rake that diameter is reduced towards rear is equipped in the rear end of the electrode in the top position.
5. short arc discharge lamp according to claim 4, which is characterized in that
The openings are located at the obtained imaginary line of rake more described than extension when from tube axial direction and lean on outward side
Position.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-152134 | 2017-08-07 | ||
| JP2017152134A JP6941275B2 (en) | 2017-08-07 | 2017-08-07 | Short arc type discharge lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109390208A true CN109390208A (en) | 2019-02-26 |
| CN109390208B CN109390208B (en) | 2023-02-28 |
Family
ID=65417516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810881849.2A Active CN109390208B (en) | 2017-08-07 | 2018-08-06 | Short arc type discharge lamp |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6941275B2 (en) |
| CN (1) | CN109390208B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006221934A (en) * | 2005-02-09 | 2006-08-24 | Yumex Inc | Positive electrode for discharge lamp |
| CN1941269A (en) * | 2005-09-27 | 2007-04-04 | 株式会社Orc制作所 | Short arc discharge lamp |
| CN101303957A (en) * | 2007-05-08 | 2008-11-12 | 株式会社Orc制作所 | Discharge lamp |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6578970B2 (en) * | 2001-09-19 | 2003-06-17 | Advanced Radiation Corporation | Point-like lamp with anode chimney |
-
2017
- 2017-08-07 JP JP2017152134A patent/JP6941275B2/en active Active
-
2018
- 2018-08-06 CN CN201810881849.2A patent/CN109390208B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006221934A (en) * | 2005-02-09 | 2006-08-24 | Yumex Inc | Positive electrode for discharge lamp |
| CN1941269A (en) * | 2005-09-27 | 2007-04-04 | 株式会社Orc制作所 | Short arc discharge lamp |
| CN101303957A (en) * | 2007-05-08 | 2008-11-12 | 株式会社Orc制作所 | Discharge lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2019032958A (en) | 2019-02-28 |
| CN109390208B (en) | 2023-02-28 |
| JP6941275B2 (en) | 2021-09-29 |
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