DE408454C - Protection tube for thermoelectric pyrometers - Google Patents

Protection tube for thermoelectric pyrometers

Info

Publication number
DE408454C
DE408454C DEH96786D DEH0096786D DE408454C DE 408454 C DE408454 C DE 408454C DE H96786 D DEH96786 D DE H96786D DE H0096786 D DEH0096786 D DE H0096786D DE 408454 C DE408454 C DE 408454C
Authority
DE
Germany
Prior art keywords
pyrometers
thermoelectric
chrome
protection tube
protection
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
DEH96786D
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.)
Vacuumschmelze GmbH and Co KG
Original Assignee
Heraeus Vacuumschmelze AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Heraeus Vacuumschmelze AG filed Critical Heraeus Vacuumschmelze AG
Priority to DEH96786D priority Critical patent/DE408454C/en
Application granted granted Critical
Publication of DE408454C publication Critical patent/DE408454C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/08—Protective devices, e.g. casings

Description

Schutzrohr für thermoelektrische Pyrometer. Für Pvrometer rohre wird Widerstandsfähigkeit J gegen hohe Temperaturen gefordert; zugleich sollen solche Rohre nach Mögl;chkeit unmittelbar in Metallbäder, wie Kupfer, Messing u. dgl., eingetaucht werden können, ohne daß ein Angriff erfolgt. Schutzrohre aus keramischen Massen eignen sich nicht gut, da sie zerbrechlich sind und ihre Wärmeleitfähigkeit zu gering ist. Man bat deshalb derartige Pyrometerschutzrohre aus Aluminiumeisen (Alit), aus Chromeisen und aus Chromnickel hergestellt, deren Widerstandsfähigkeit gegen hohe Temperaturen jedoch nicht ausreichend ist; außerdem werden solche Rohre von Kupfer- und Messingbädern angegriffen. Neuerdings hat man versucht, verchromte Stahlrohre zu benutzen, ohne jedoch durch die Verchromung die Nachteile (les Stahlrohres vollkommen beseitigen zu können.Protection tube for thermoelectric pyrometers. For Pvrometer tubes will Resistance J to high temperatures required; at the same time such Pipes, if possible, directly into metal baths, such as copper, brass and the like, can be immersed without being attacked. Ceramic thermowells Masses are not well suited as they are fragile and their thermal conductivity is too low. Therefore, such pyrometer protection tubes made of aluminum iron were asked for (Alit), made of chrome iron and chrome nickel, their resistance however, is not sufficient against high temperatures; in addition, such pipes attacked by copper and brass baths. Lately attempts have been made to chrome-plated To use steel pipes, but without the disadvantages due to the chrome plating (les Stahlrohres to be able to completely eliminate.

Diese Mängel werden beseitigt, wenn als Pvrometerschutzrohre Rohre aus reinem Chrom verwendet werden, die bis zu den erforderlichenTemperaturen vollkommen widerstandsfähig sind und ohne Beschädigung unmittelbar in geschmolzenes Kupfer oder Messing eingetaucht werden können. Derartige Rohre können starkwandig durch Guß hergestellt werden, in geringer Wandstärke zweckmäßig durch Elektrolyse, indem man beispielsweise einen Kern, bestehend aus Rundeisen oder Eisenrohr, elektrolytisch verchromt und dann aus dem elektrolvtisch abgeschiedenen Chromrohr den Kern durch Herauslösen mit Säure o. dgl. entfernt.These shortcomings are eliminated when pipes are used as pvrometer protection tubes made of pure chrome are used, which are perfect up to the required temperatures are resistant and without damage directly into molten copper or brass can be immersed. Such pipes can be thick-walled Cast are made, in a small wall thickness, expediently by electrolysis by For example, a core consisting of round iron or iron pipe is electrolytically chrome-plated and then through the core from the electrolv table separated chrome tube Dissolving out with acid or the like. Removed.

Claims (3)

PATENTANSPRÜCHE: t. Schutzrohr für thermoelektrische Pyrometer, dadurch gekennzeichnet, daß das einseitig geschlossene Rohr aus Neinchrom besteht. PATENT CLAIMS: t. Protection tube for thermoelectric pyrometers, thereby characterized in that the tube, which is closed on one side, is made of chromium. 2. Verfahren zur Herstellung von Pyrometerschutzrohren aus Reinchrom, dadurch gekennzeichnet, daß die Rohre aus geschmolzenem Chrom gegossen werden. 2. Procedure for the production of pyrometer protection tubes made of pure chrome, characterized in that that the tubes are cast from molten chrome. 3. Verfahren zur Herstellung von Pyrometerschutzrohren aus Reinchrom, dadurch gekennzeichnet, daß eine genügend starke Chromschicht elektrolytisch auf einem Kern aus anderem Material niedergeschlagen und nachträglich .dieser Kern herausgelöst wird.3. Method of manufacture of pyrometer protection tubes made of pure chrome, characterized in that a sufficient strong chromium layer deposited electrolytically on a core made of another material and subsequently .this core is removed.
DEH96786D 1924-04-06 1924-04-06 Protection tube for thermoelectric pyrometers Expired DE408454C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH96786D DE408454C (en) 1924-04-06 1924-04-06 Protection tube for thermoelectric pyrometers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH96786D DE408454C (en) 1924-04-06 1924-04-06 Protection tube for thermoelectric pyrometers

Publications (1)

Publication Number Publication Date
DE408454C true DE408454C (en) 1925-01-20

Family

ID=7167644

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH96786D Expired DE408454C (en) 1924-04-06 1924-04-06 Protection tube for thermoelectric pyrometers

Country Status (1)

Country Link
DE (1) DE408454C (en)

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