SU993364A1

SU993364A1 - Sealed lead-in into quartz bulb of gas-discharge lamp

Info

Publication number: SU993364A1
Application number: SU813233730A
Authority: SU
Inventors: Арташес Агванович Вартанян; Иветта Александровна Сахарова
Original assignee: Предприятие П/Я Г-4219
Priority date: 1981-01-08
Filing date: 1981-01-08
Publication date: 1983-01-30

Description

Изобретение относитс к электротехнической промышленности, а именно к фольговым токовводам газоразр дных кварцевых ламп.The invention relates to the electrical industry, namely to foil current leads for gas discharge quartz lamps.

Известны фольговые токовводы газоразр дных кварцевых ламп, содержащие сплошной цилиндрический вкладыш (штабик ) со свернутой вокруг него фольгой . Кра фольги обработаны на остриё 1.The foil current inlets of gas-discharge quartz lamps are known, which contain a continuous cylindrical liner (rod) with a foil rolled around it. Kra foil processed on the point 1.

Однако указанные вкладыши не могут быть использованы-в токовводах диаметром более 6 мм, так как не обеспечиваетс герметичность ввода.However, the indicated liners cannot be used in current leads with a diameter of more than 6 mm, since the tightness of the inlet is not ensured.

Наиболее близок к предлагаемому фольговый ТОКОВВОД дл газоразр дных кварцевых ламп, содержащий полый цилиндрический кварцевый вкладыш с полостью внутри.Closest to the proposed foil CURRENT for gas-discharge quartz lamps containing a hollow cylindrical quartz insert with a cavity inside.

. Молибденова цилиндрическа фольга , соединенна с одной стороны с электродом, а с другой - с выводом, заварена между боковыми поверхност ми цилиндрической части колбы и вкладыша .. Molybdenum cylindrical foil, connected on one side with the electrode, and on the other with a conclusion, is welded between the side surfaces of the cylindrical part of the flask and the liner.

При изготовлении такого вкладыша внутри него оставл ют воздух при остаточном давлении 150-200 мм рт..ст. котороепри заварке токоввода поднимаетс до атмосферного давлени , неIn the manufacture of such a liner, air is left inside it at a residual pressure of 150-200 mm Hg. which, when welding the current lead, rises to atmospheric pressure, does not

jпревыша его. Этим достигаетс обжатие фольги двум кварцевыми поверхност ми С2 D.j exceeding him. By this, the foil is compressed by two C2 D quartz surfaces.

Однако данные токовводы невозможно использовать на больших токах, . так как естественного охлаждени недостаточно , а применение принудительного охлаждени требует дополнительных рубашек на вводах ламп, However, these current leads cannot be used on high currents,. since natural cooling is not enough, and the use of forced cooling requires additional shirts at the inputs of the lamps,

10 что значительно усложн ет конструкцию токовводов.10, which significantly complicates the design of the current leads.

При заварке токоввода с известным вклададшем перегрев его, а также превышение расчетной величины давлени When welding the current lead with a known contribution, overheating it, as well as exceeding the calculated pressure value

15 внутри вкладыша привод т к по влению трещин и разрывов в фольге, а в некоторых случа х и к взрыву вкладыша . Если же давление внутри вкладыша ниже расчетного, то при заварке 15 inside the liner leads to the appearance of cracks and tears in the foil, and in some cases to the explosion of the liner. If the pressure inside the liner is lower than the calculated, then when welding

20 ввода происходит усадка вкладыша. на фольге по вл ютс скл.адки и герме тичность ввода нарушаетс .20 entry occurs shrinkage of the liner. Plates appear on the foil and the tightness of the input is broken.

Цель изобретени -. повышение предела токовых нагрузок, надежности The purpose of the invention is. increasing the limit of current loads, reliability

25 и упрощение технологии изготовлени .25 and simplified manufacturing technology.

Claims

This goal is achieved by the fact that in a sealed current lead into a quartz flask of a gas discharge lamp containing a cylindrical molybdenum foil connected at opposite ends with an electrode and a terminal, respectively, the cavity of the liner the output side is open for communication with the atmosphere. The drawing shows the principal design of the current supplying gas discharge quartz lamp. The foil current lead, welded into the stem 1 of the lamp bulb, contains a hollow cylindrical quartz insert 2 with a cavity 3, closed from one end part facing the electrode 4, a continuous quartz wall 5, and from the output side the cavity of the insert is open to connect it with the atmosphere . Around, the insert 2 is folded, the molybdenum foil b, is welded on one side to the electrode and on the other to the ring terminal 7. When the lamp is in operation, the current lead is heated. The natural and forced cooling of the liner 2, molybdenum foil b and the leg 1 is carried out through an opening in the cavity of the liner 2. Thus, the cooling of the current lead is performed from the outer and inner sides and becomes more intense, so the current load can be increased. The use of the present invention makes it possible to improve the manufacturability of the current lead. In addition, the current limit of the gas discharge quartz lamps can be increased by improving the cooling conditions. Claims A sealed current lead into a quartz flask of a gas discharge lamp containing cylindrical molybdenum foil connected at opposite ends to an electrode and a lead, respectively, and welded between the side surfaces of the cylindrical part of the flask and cylindrical quartz liner with a cavity characterized in that current loads, reliability and simplification of manufacturing technology, the cavity of the liner on the output side is made open to communicate with the atmosphere. Sources of information taken into account in the examination 1. GN Rokhlin. Gas discharge light sources. M.-L. , energy i 1966, p. 202.

2. Marshak I.S. Pulsed light sources. M.-G., Gosenergoizdat, 1963, p. 225.