DE319852C - Equipment on metal vapor rectifiers, in which an insulating intermediate piece is inserted into the metal pipe connection leading from the metal vacuum vessel to the permanently connected air pump - Google Patents

Equipment on metal vapor rectifiers, in which an insulating intermediate piece is inserted into the metal pipe connection leading from the metal vacuum vessel to the permanently connected air pump

Info

Publication number
DE319852C
DE319852C DENDAT319852D DE319852DD DE319852C DE 319852 C DE319852 C DE 319852C DE NDAT319852 D DENDAT319852 D DE NDAT319852D DE 319852D D DE319852D D DE 319852DD DE 319852 C DE319852 C DE 319852C
Authority
DE
Germany
Prior art keywords
metal
air pump
pipe connection
intermediate piece
equipment
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
Application number
DENDAT319852D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GLEICHRICHTER AG
Original Assignee
GLEICHRICHTER AG
Publication date
Application granted granted Critical
Publication of DE319852C publication Critical patent/DE319852C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J13/00Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes
    • H01J13/02Details
    • H01J13/28Selection of substances for gas filling; Means for obtaining the desired pressure within the tube
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00Discharge tubes and lamps
    • H01J2893/0072Disassembly or repair of discharge tubes
    • H01J2893/0073Discharge tubes with liquid poolcathodes; constructional details
    • H01J2893/0074Cathodic cups; Screens; Reflectors; Filters; Windows; Protection against mercury deposition; Returning condensed electrode material to the cathodic cup; Liquid electrode level control
    • H01J2893/0086Gas fill; Maintaining or maintaining desired pressure; Producing, introducing or replenishing gas or vapour during operation of the tube; Getters; Gas cleaning; Electrode cleaning

Landscapes

  • Particle Accelerators (AREA)

Description

Einrichtung an Metalldampfgleichrichtern, bei welchen in die vom metallischen Vakuumgefäß zur dauernd angeschlossenen. Luftpumpe führende metallische Rohrverbindung ein isolierendes Zwischenstück eingeschaltet ist. Bei Metalldampfgleichrichtern mit Metallgefäß und dauernd angeschlossener Luftpumpe ist es zweckmäßig, die metallische Rohrverbindung durch ein isolierendes, gasdichtes Zwischenstück zu unterbrechen. Die Erfahrung hat gelehrt, daß die Innenwandung des Isolierstückes durch Glimm- oder Lichtbogenentladungen zwischen den anschließenden Metallflächen allmählich geschwärzt wird. Der Niederschlag ist zum Teil gut leitend und führt mit der Zeit zur vollständigen Aufhebung der Isolation.Equipment on metal vapor rectifiers, in which the metal Vacuum vessel to the permanently connected. Metallic pipe connection leading to the air pump an insulating intermediate piece is switched on. With metal vapor rectifiers with a metal vessel and permanently connected air pump, it is advisable to use the metallic Interrupt the pipe connection with an insulating, gas-tight intermediate piece. Experience has shown that the inner wall of the insulating piece is caused by glowing or arc discharges gradually between the adjacent metal surfaces is blackened. The precipitation is partly very conductive and leads over time to completely remove the isolation.

Die Erfindung bezweckt deshalb, eine Einrichtung zu treffen, um einerseits die bezeichneten Entladungen zu lokalisieren und andererseits ihr Auftreten möglichst zu unterdrücken. Hierbei stützt sie sich auf die aus der Physik der elektrischen Entladungen bekannte Erscheinung, daß bei starker Annäherung zweier Elektroden infolge der stark verkürzten, freien Wegstrecke eine Stoßionisierung nicht zustande kommen kann. Infolgedessen tritt auch eine Verzögerung oder gänzliche Unterbindung der Entladung auf.The invention therefore aims to provide a device to on the one hand to localize the designated discharges and, on the other hand, their occurrence as far as possible to suppress. In doing so, it relies on the physics of electrical engineering Discharges known phenomenon that when two electrodes come close together as a result the greatly shortened, free path an impact ionization does not come about can. As a result, there is also a delay or complete prevention of the Discharge on.

In beiliegender Zeichnung stellen l,. und 1, Teile der Vakuumleitung mit den Flanschen f, und f= dar. Ein Isolator i bildet das trennende Zwischenstück, welches beiderseits mittels Gummiringe gasdicht abschließt. Auch die zur Pressung verwendeten Schraubenbolzen sind mittels Rohr 1a und Unterlagsscheibe in isolierend angebracht. Mit den Flanschen f 1 und f 2 elektrisch gut verbunden sind die Elektroden a und b, die sich in einem verhältnismäßig geringen Abstand x gegenüberstehen. Die Entfernung x wird derart klein bemessen, daß zwischen den Elektroden die freie Weglänge für eine Stoßionisierung nicht genügt. Bei einem Abstand von 5 mm z. B. hören die Entladungen oberhalb Vakua von o,2 mm Quecksilberdruck vollständig auf, während bei Abständen von 2o mm und mehr noch bei o,o5 mm Druck lebhafte Entladungen zu beobachten sind: Da die unterste Grenze für den normalen Betriebsdruck vom Metalldampfgleichrichter mit etwa o,i mm Quecksilbersäule gegeben ist, genügt die hier beschriebene Maßnahme, um die Isolierfähigkeit des in die Vakuumleitung eingesetzten Isolators zu erhalten,.In the accompanying drawing, l ,. and 1, parts of the vacuum line with the flanges f, and f = represent. An insulator i forms the separating intermediate piece, which is sealed gas-tight on both sides by means of rubber rings. The screw bolts used for pressing are also attached in an insulating manner by means of tube 1a and washer. Electrodes a and b, which are opposite each other at a relatively small distance x, are electrically well connected to the flanges f 1 and f 2. The distance x is made so small that the free path between the electrodes is insufficient for impact ionization. At a distance of 5 mm z. B. the discharges cease completely above a vacuum of 0.2 mm mercury pressure, while at distances of 20 mm and more vigorous discharges can be observed even at 0.05 mm pressure: Since the lowest limit for the normal operating pressure of the metal vapor rectifier is about o , i mm of mercury column is given, the measure described here is sufficient to maintain the insulating capacity of the insulator inserted in the vacuum line.

Claims (1)

PATENT-ANsPRÜcH: Einrichtung an Metalldampfgleichrichtern, bei welchen in die vom metallischen Vakuumgefäß zur dauernd angeschlossenen Luftpumpe führende metallische Rohrverbindung ein isolierendes Zwischenstück eingeschaltet ist, dadurch gekennzeichnet, daß innerhalb des röhrenförmigen Isolators Elektroden, die mit den an diesem angeschlossenen Metallrohren elektrisch verbunden sind, einander so nahe gegenüberstehen, daß infolge stark verkürzter freier Weglänge der Elektroden Entladungen längs der Innenwandung des Isolierstückes so gut wie unmöglich sind.PATENT CLAIM: Equipment on metal vapor rectifiers where into the air pump leading from the metallic vacuum vessel to the permanently connected air pump metallic pipe connection an insulating intermediate piece is switched on, thereby characterized in that within the tubular insulator electrodes connected to the at this connected metal pipes are electrically connected, so close to each other oppose the fact that discharges as a result of the greatly reduced free path length of the electrodes along the inner wall of the insulating piece are as good as impossible.
DENDAT319852D Equipment on metal vapor rectifiers, in which an insulating intermediate piece is inserted into the metal pipe connection leading from the metal vacuum vessel to the permanently connected air pump Expired DE319852C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE319852T

Publications (1)

Publication Number Publication Date
DE319852C true DE319852C (en) 1920-04-07

Family

ID=6152422

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT319852D Expired DE319852C (en) Equipment on metal vapor rectifiers, in which an insulating intermediate piece is inserted into the metal pipe connection leading from the metal vacuum vessel to the permanently connected air pump

Country Status (1)

Country Link
DE (1) DE319852C (en)

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