JPS6331482Y2 - - Google Patents
Info
- Publication number
- JPS6331482Y2 JPS6331482Y2 JP1981098387U JP9838781U JPS6331482Y2 JP S6331482 Y2 JPS6331482 Y2 JP S6331482Y2 JP 1981098387 U JP1981098387 U JP 1981098387U JP 9838781 U JP9838781 U JP 9838781U JP S6331482 Y2 JPS6331482 Y2 JP S6331482Y2
- Authority
- JP
- Japan
- Prior art keywords
- arc tube
- inner diameter
- electrodes
- pressure sodium
- sodium lamp
- 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.)
- Expired
Links
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 13
- 229910052708 sodium Inorganic materials 0.000 claims description 13
- 239000011734 sodium Substances 0.000 claims description 13
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 6
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000292 calcium oxide Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000000941 radioactive substance Substances 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 239000012857 radioactive material Substances 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Landscapes
- Discharge Lamp (AREA)
Description
【考案の詳細な説明】
本考案は高圧ナトリウムランプ、とくに特殊な
形状の発光管形状をそなえた高圧ナトリウムラン
プに関するものである。[Detailed Description of the Invention] The present invention relates to a high-pressure sodium lamp, and particularly to a high-pressure sodium lamp having a special arc tube shape.
一般に、高圧ナトリウムランプにおいては、発
光管の材料であるセラミツク（多結晶アルミナ）
と電極に被着された電子放射性物質の成分である
酸化カルシウム（CaO）とが反応して、酸化カル
シウムが多結晶アルミナの粒界に沿つて発光管壁
に入り込み、これによつて発光管にクラツクが生
じるという問題があつた。 In general, high-pressure sodium lamps use ceramic (polycrystalline alumina), which is the material for the arc tube.
Calcium oxide (CaO), which is a component of the electron radioactive material deposited on the electrodes, reacts with each other, and the calcium oxide enters the arc tube wall along the grain boundaries of polycrystalline alumina. There was a problem with cracks occurring.
本考案は、発光管の形状を、電極の周囲の部分
が中央部分の内径より大となるよう構成すること
によつて、上記問題を除去した高圧ナトリウムラ
ンプを提供することを目的とするものであり、以
下その一実施例について図面を用いて説明する。 The object of the present invention is to provide a high-pressure sodium lamp that eliminates the above problem by configuring the arc tube so that the inner diameter of the peripheral portion of the electrode is larger than the inner diameter of the central portion. One example of this will be described below with reference to the drawings.
図は本考案の一実施例である高圧ナトリウムラ
ンプの発光管の断面図であり、１は透光性のアル
ミナセラミツク、イツトリアセラミツクなどのセ
ラミツクからなる発光管で、この両端部には導電
体２，３の先端に付設された電極４，５が設けら
れている。電極４，５には酸化カルシウムを含む
電子放射性物質が付着されている。発光管１の電
極４，５の周囲の部分の内径は中央部の内径より
も大きくなつている。導電体２，３はセメント
６，７により発光管１に気密に封着されている。
発光管１内にはナトリウム、緩衝ガス用金属およ
び始動用希ガスが封入されている。 The figure is a cross-sectional view of the arc tube of a high-pressure sodium lamp that is an embodiment of the present invention. Reference numeral 1 indicates an arc tube made of translucent ceramic such as alumina ceramic or itria ceramic. Electrodes 4 and 5 attached to the tips of 2 and 3 are provided. An electron radioactive substance containing calcium oxide is attached to the electrodes 4 and 5. The inner diameter of the portion surrounding the electrodes 4 and 5 of the arc tube 1 is larger than the inner diameter of the central portion. The conductors 2 and 3 are hermetically sealed to the arc tube 1 with cements 6 and 7.
The arc tube 1 is filled with sodium, a metal for buffer gas, and a rare gas for starting.
かかる高圧ナトリウムランプは、発光管１の電
極４，５の周囲の部分の内径が中央部の内径より
も大きくなつているので、ランプ点灯中電極４，
５の周囲の発光管１の壁面に付着する酸化カルシ
ウムの付着量が著しく抑制される。しかも、その
壁面の発光管壁の温度が従来のものに比べて低く
なる。その結果、長時間点灯後においても発光管
のクラツク発生を防止することができる。 In such a high-pressure sodium lamp, the inner diameter of the peripheral portion of the electrodes 4, 5 of the arc tube 1 is larger than the inner diameter of the central portion, so that the electrodes 4,
The amount of calcium oxide adhering to the wall surface of the arc tube 1 around the arc tube 5 is significantly suppressed. Moreover, the temperature of the wall surface of the arc tube is lower than that of the conventional one. As a result, it is possible to prevent the arc tube from cracking even after being lit for a long time.
なお、電極の周囲の部分の内径が中央部の内径
よりも大きい形状のランプは、けい光ランプ、キ
セノンランプなどにおいてすでに提案されている
が、これは電極物質の飛散による管壁黒化を防止
することを目的とするものであり、本考案の対象
とする高圧ナトリウムランプとは目的および作用
効果において全く異なるものである。 Incidentally, lamps in which the inner diameter of the peripheral part of the electrode is larger than the inner diameter of the central part have already been proposed for fluorescent lamps, xenon lamps, etc., but this prevents blackening of the tube wall due to scattering of electrode material. This is a device that is completely different in purpose and function from the high-pressure sodium lamp that is the object of the present invention.
次に、本考案の具体的な例を説明する。 Next, a specific example of the present invention will be explained.
図において、発光管１は多結晶アルミナからな
り、酸化カルシウムを含む電子放射性物質を付着
した電極４，５の周囲の部分の発光管１の内径は
4.8mmで、電極４，５の先端から前方へ向かつて
約２mmの所まで太くなつており、中央部の発光管
１の内径は3.2mmと細くなつている。電極４，５
の外径は２mmで、電極間距離は31mmである。発光
管１内にはナトリウム1.5mg、水銀７mgおよびキ
セノンガス30Torrが封入されている。 In the figure, the arc tube 1 is made of polycrystalline alumina, and the inner diameter of the area around the electrodes 4 and 5 to which the electron radioactive material containing calcium oxide is attached is
The diameter is 4.8 mm, and it becomes thicker to about 2 mm from the tips of the electrodes 4 and 5 toward the front, and the inner diameter of the arc tube 1 in the center is tapered to 3.2 mm. Electrodes 4, 5
The outer diameter of the electrode is 2 mm, and the distance between the electrodes is 31 mm. The arc tube 1 is filled with 1.5 mg of sodium, 7 mg of mercury, and 30 Torr of xenon gas.
かかる高圧ナトリウムランプを入力70Wで10灯
について点灯試験をしたところ、12000時間の長
時間の点灯後においても、いずれのものも発光管
にクラツクが生じないことが確認された。 A lighting test was conducted on 10 such high-pressure sodium lamps at an input of 70 W, and it was confirmed that no cracks occurred in the arc tubes of any of the lamps even after being lit for a long time of 12,000 hours.
以上説明したように、本考案によれば、長時間
の点灯にわたつてセラミツク発光管にクラツクを
生じることのない高圧ナトリウムランプが得られ
るものである。 As explained above, according to the present invention, a high-pressure sodium lamp can be obtained that does not cause cracks in the ceramic arc tube even when the lamp is lit for a long time.
図は本考案にかかる高圧ナトリウムランプの発
光管の一実施例を示す断面図である。
１……発光管、２，３……導電体、４，５……
電極。
The figure is a sectional view showing one embodiment of the arc tube of the high-pressure sodium lamp according to the present invention. 1... Arc tube, 2, 3... Conductor, 4, 5...
electrode.
Claims (1)
を被着した電極を備えた透光性セラミツクからな
る発光管の前記電極の周囲の部分の内径を中央部
の内径よりも大きくなしたことを特徴とする高圧
ナトリウムランプ。 A light emitting tube made of translucent ceramic having electrodes coated with an electron radioactive substance containing calcium oxide at both ends thereof is characterized in that the inner diameter of the portion around the electrodes is larger than the inner diameter of the central portion. High pressure sodium lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9838781U JPS582957U (en) | 1981-06-30 | 1981-06-30 | high pressure sodium lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9838781U JPS582957U (en) | 1981-06-30 | 1981-06-30 | high pressure sodium lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS582957U JPS582957U (en) | 1983-01-10 |
| JPS6331482Y2 true JPS6331482Y2 (en) | 1988-08-23 |
Family
ID=29893148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9838781U Granted JPS582957U (en) | 1981-06-30 | 1981-06-30 | high pressure sodium lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS582957U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS516998A (en) * | 1974-05-28 | 1976-01-20 | Richter Gedeon Vegyeszet |
-
1981
- 1981-06-30 JP JP9838781U patent/JPS582957U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS516998A (en) * | 1974-05-28 | 1976-01-20 | Richter Gedeon Vegyeszet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS582957U (en) | 1983-01-10 |
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