DE533962C - Shielding device for the anodes to prevent flashbacks from metal vapor rectifiers - Google Patents
Shielding device for the anodes to prevent flashbacks from metal vapor rectifiersInfo
- Publication number
- DE533962C DE533962C DENDAT533962D DE533962DD DE533962C DE 533962 C DE533962 C DE 533962C DE NDAT533962 D DENDAT533962 D DE NDAT533962D DE 533962D D DE533962D D DE 533962DD DE 533962 C DE533962 C DE 533962C
- Authority
- DE
- Germany
- Prior art keywords
- shielding device
- anodes
- metal vapor
- vapor rectifiers
- anode
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J13/00—Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes
- H01J13/02—Details
- H01J13/20—Control electrodes, e.g. grid
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0072—Disassembly or repair of discharge tubes
- H01J2893/0088—Tubes with at least a solid principal cathode and solid anodes
- H01J2893/009—Anode systems; Screens
- H01J2893/0092—Anodic screens or grids
Landscapes
- Physical Vapour Deposition (AREA)
Description
Zur Verhinderung von Rückzündungen müssen die Anoden in Metalldampfgleichrichtern vor dem direkten Auftreffen der vom Dampfstrom mitgerissenen Quecksilberteilchen geschützt werden. Die gebräuchlichsten Einrichtungen verlängern entweder den Lichtbogenweg beträchtlich oder verringern dessen Querschnitt in unzulässiger Weise. Hierdurch wird aber die Rückzündungssicherheit zumThe anodes in metal vapor rectifiers must be used to prevent re-ignition before the direct impact of the mercury particles carried away by the steam stream to be protected. The most common devices either extend the arc path considerably or reduce its cross-section in an impermissible manner. Through this but the backfire safety becomes
ίο Teil wieder aufgehoben. Denn Rückzündungen entstehen nicht nur, wenn Quecksilberteilchen durch den Dampfstrom auf die Anode gelangen, sie entstehen auch, wenn der Lichtbogenabfall zu groß wird. Steigt der Abfall über eine gewisse Grenze, d. h. wird das Spannungsgefälle in dem Anodenrohr zu groß, so tritt ein Teilstrom in der Nähe der Anode in das Schutzrohr ein und am Ende wieder aus. Die in der Nähe der Anode auf dem Schutzrohr sich bildenden kathodischen Teilentladungen, welche Elektronen aussenden, können dann beim Stromwechsel von einer Anode zur anderen ebenfalls Rückzündungen hervorrufen. Aus diesem Grunde ist es wichtig, eine Bauart zu- finden, die beiden Forderungen Rechnung trägt.ίο part canceled again. Because reignition not only arise when mercury particles hit the anode by the steam flow reach, they also arise when the arc drop becomes too large. The waste increases over a certain limit, d. H. If the voltage gradient in the anode tube is too great, a partial current occurs in the vicinity of the Anode in the protective tube and at the end off again. The one near the anode cathodic partial discharges which form in the protective tube and which emit electrons, can then also backfire when the current is switched from one anode to the other cause. For this reason, it is important to find a type of construction that can accommodate both Takes account of demands.
Erfindungsgemäß wird dies dadurch erreicht, daß in -die Anodenschutzrohre doppelt- oder mehrgängige schraubenförmig gekrümmte Bleche zur Führung des Dampfstromes eingebaut werden.According to the invention this is achieved in that -the anode protection tubes double- or multi-thread, helically curved metal sheets can be installed to guide the steam flow.
Eine derartige Anordnung ist in Abb. 1 in Ansicht, in Abb. 2 im Grundriß dargestellt. α ist die Anode, j das Anodenschutzrohr, b ein als doppelt gängige Schraube gewundenes Blech, welches das Rohr mit i8o° Drall ausfüllt.Such an arrangement is shown in Fig. 1 in view, in Fig. 2 in plan. α is the anode, j the anode protection tube, b a sheet metal wound as a double-turn screw, which fills the tube with a twist of 180 °.
Abb. 3 und 4 zeigen im Auf- und Grundriß zwei im rechten Winkel sich kreuzende Schutzbleche b und c, welche eine viergängige Schraubenfläche bilden. Der von unten eintretende Lichtbogen kommt auf diese Weise mit der Schraubennäche in Berührung und gibt alle mitgenommenen Quecksilberteilchen an diese ab, bevor er auf die Anode trifft.Fig. 3 and 4 show in plan and ground plan two protective plates b and c crossing at right angles, which form a four-thread screw surface. In this way, the arc entering from below comes into contact with the screw surface and releases all the mercury particles it has carried along with it before it hits the anode.
Dabei wird der Lichtbogenweg nur unwesentlich verlängert. Es wird also durch diese Anordnung den eingangs aufgestellten Forderungen in weitestem Maße Rechnung getragen und so ein äußerst wirksamer Schutz gegen Rückzündung erzielt.The arc path is only slightly extended. So it will be through this arrangement largely takes account of the requirements set out at the beginning worn and thus achieved an extremely effective protection against flashback.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE533962T |
Publications (1)
Publication Number | Publication Date |
---|---|
DE533962C true DE533962C (en) | 1931-09-21 |
Family
ID=6556255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT533962D Expired DE533962C (en) | Shielding device for the anodes to prevent flashbacks from metal vapor rectifiers |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE533962C (en) |
-
0
- DE DENDAT533962D patent/DE533962C/en not_active Expired
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