DE1274379B - Process for the production of protective tubes for thermometers - Google Patents

Process for the production of protective tubes for thermometers

Info

Publication number
DE1274379B
DE1274379B DE1964B0079446 DEB0079446A DE1274379B DE 1274379 B DE1274379 B DE 1274379B DE 1964B0079446 DE1964B0079446 DE 1964B0079446 DE B0079446 A DEB0079446 A DE B0079446A DE 1274379 B DE1274379 B DE 1274379B
Authority
DE
Germany
Prior art keywords
thermometers
protective tubes
production
extruder
manufacture
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.)
Pending
Application number
DE1964B0079446
Other languages
German (de)
Inventor
Rudolf Brueggen
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.)
BRUEGGEN U SOEHNE M
Original Assignee
BRUEGGEN U SOEHNE M
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 BRUEGGEN U SOEHNE M filed Critical BRUEGGEN U SOEHNE M
Priority to DE1964B0079446 priority Critical patent/DE1274379B/en
Publication of DE1274379B publication Critical patent/DE1274379B/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/08Protective devices, e.g. casings
    • G01K1/12Protective devices, e.g. casings for preventing damage due to heat overloading
    • G01K1/125Protective devices, e.g. casings for preventing damage due to heat overloading for siderurgical use

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Paper (AREA)

Description

Verfahren zur Herstellung von Schutzrohren für Thermometer Die Erfindung bezieht sich auf ein Verfahren zur Herstellung von Schutzrohren für Thermometer in Stahlschmelzen mittels Extruder. Die bekannten Schutzrohre bestehen aus gewickelten Papierbändern oder Pappen. Sie haben den Nachteil, daß sie nur kurzzeitig in ein Metallbad eingetaucht werden können und schnell der Verbrennung unterliegen.Method of making protective tubes for thermometers The invention relates to a process for the manufacture of protective tubes for thermometers in steel melts using an extruder. The known protective tubes consist of wound Paper tapes or cardboard. They have the disadvantage that they are only briefly in a Metal bath can be immersed and are quickly subject to combustion.

Ein langes Eintauchen würde ein Zerstören des Thermometers zur Folge haben. Ein kurzzeitiges Eintauchen kann jedoch eine genaue Messung der hohen Temperaturen in einer Metallschmelze nicht zulassen.Long immersion would destroy the thermometer to have. Brief immersion, however, can provide an accurate measurement of the high temperatures Do not allow in a molten metal.

Um eine genauere Messung durchführen zu können, wurde bereits vorgeschlagen, die Schutzrohre aus einem keramischen Material herzustellen. Diese keramischen Schutzrohre sind aber sehr teuer, so daß ihre Verwendung für das Messen von Stahlschmelzen wirtschaftlich untragbar wird.In order to be able to carry out a more precise measurement, it has already been suggested that manufacture the protective tubes from a ceramic material. These ceramic protective tubes but are very expensive, so that their use for measuring steel melts is economical becomes intolerable.

Der Erfindung liegt die Aufgabe zugrunde, ein Schutzrohr für Thermometer zum Messen von hohen Temperaturen in Stahlschmelzen so herzustellen, daß es sich durch Billigkeit und größerer Unempfindlichkeit gegenüber hohen Temperaturen auszeichnet. Die Lösung dieses technischen Problems wird in einem Herstellungsverfahren mittels eines Extruders darin gesehen, daß Fangstoffe, die bei der Fabrikation von Papier, Zellstoffen od. dgl. als Abfallprodukte abfallen, in einer Vorpresse erwärmt und nach Durchdringen eines siebartigen Widerstandes in einer Nachpresse mit nachgeschaltetem Mundstück unter einem dem Trocknungsvorgang entsprechend hohen Druck extrudiert werden. The invention is based on the object of a protective tube for thermometers for measuring high temperatures in molten steel so that it can characterized by cheapness and greater insensitivity to high temperatures. The solution to this technical problem is in a manufacturing process by means of of an extruder is seen in the fact that catches that are used in the manufacture of paper, Pulp or the like fall off as waste products, heated in a prepress and after penetrating a sieve-like resistance in a subsequent press with a downstream Mouthpiece extruded under a high pressure corresponding to the drying process will.

Eine Vorrichtung zur Ausführung des Verfahrens gemäß der Erfindung ist in der Zeichnung durch ein Ausführungsbeispiel schematisch dargestellt. An apparatus for carrying out the method according to the invention is shown schematically in the drawing by an exemplary embodiment.

Es hat sich überraschenderweise herausgestellt, daß die bei der Fertigung von Zellstoffen, Papier od. dgl. als Abfallprodukte im nassen Zustand anfallenden Fangstoffe sich in einem Extruder zu Schutzrohren für Thermometer verformen lassen, die zur Messung von hohen Temperaturen in Metallschmelzen zur Anwendung kommen. Diese Fangstoffe sind ein Gemisch aus wenig Fasern und einer großen Menge an anorganischen Stoffen wie Kaolin, Ton od. dgl., wobei natürliche Bindemittel enthalten sind (Handbuch der Papier- und Pappenfabrikation, 1944, Bd. 1, S. 395). It has surprisingly been found that during manufacture of cellulose, paper or the like as waste products in the wet state Traps can be shaped in an extruder into protective tubes for thermometers, which are used to measure high temperatures in molten metal. These traps are a mixture of few fibers and a large amount of inorganic ones Substances such as kaolin, clay or the like, with natural binders included (manual of paper and cardboard manufacture, 1944, vol. 1, p. 395).

Einer Vorrichtung gemäß der Erfindung werden die Fangstoffe in der Aufgabe 1 einer Vorpresse 2 zugegeben. Diese Vorpresse 2 hat an ihrem rückwärtigen Ende 3 einen Sammelbehälter zur Aufnahme für das Wasser, in welchem während der Verpressung sich das in den Fangstoffen in über- mäßigen Mengen enthaltene Wasser ansammelt. A device according to the invention, the traps in the Task 1 of a prepress 2 added. This prepress 2 has on its rear End 3 a collecting container for receiving the water, in which during the Injected in the catch materials in over- moderate amounts of water contained accumulates.

Dieses Wasser wird durch ein Abflußrohr 4 nach außen abgeführt.This water is discharged to the outside through a drain pipe 4.

Am vorderen Ende der Vorpresse 2 befindet sich ein siebartiger Widerstand 5, um innerhalb der Schneckengänge einen solchen Druck zu erzeugen, daß eine gehörige Entwässerung und damit Erwärmung der Massen stattfindet. At the front end of the prepress 2 there is a sieve-like resistor 5, in order to generate such a pressure within the screw flights that a proper Drainage and thus warming of the masses takes place.

Nach Durchdringen des siebartigen Widerstandes 5 werden die Massen in eine Nachpresse 6 gedrückt, an der ein Mundstück 7 für die Verformung und Verpressung der Massen zu Rohren nachgeschaltet ist. Die Nachpresse 6 sowie das nachgeschaltete Mundstück 7 sind so ausgestaltet, daß die Massen unter einem dem Trocknungsvorgang entsprechend hohen Druck extrudiert werden. Auf diese Weise ist es möglich, den bei der Zellstoff- und Papierfabrikation als Abfallprodukt anfallenden Schlamm von Fangstoffen mit hohem Wassergehalt so zu entwässern, daß sie für den Durchfluß im Extruder unter hohem Druck genügend Wärme und Fließfähigkeit für die Verformung zu Rohren haben und während ihres Durchgangs durch die Nachpresse einem dem Trocknungsvorgang entsprechend hohen Druck unterliegen, so daß diese Rohre bei ihrem Austritt aus dem Extruder eine genügende Standfestigkeit zur Ablage und nachfolgendem Transport aufweisen. Diese aus Abfallprodukten hergestellten Rohre zeichnen sich durch Standfestigkeit bei hohen Temperaturen aus und lassen sich in einem Extruder billig herstellen. Die Standfestigkeit bei hohen Temperaturen gestattet ein längeres Eintauchen der Rohre in Stahlschmelzen, so daß sich genaue Temperaturmessungen mit Thermometern durchführen lassen, die durch erfindungsgemäß hergestellte Rohre geschützt sind. After penetrating the sieve-like resistance 5, the masses pressed into a post press 6, on which a mouthpiece 7 for the deformation and pressing downstream of the masses to form pipes. The post press 6 as well as the downstream Mouthpiece 7 are designed so that the masses under a drying process be extruded according to high pressure. In this way it is possible to use the sludge from pulp and paper production as a waste product To drain catches with a high water content so that they are for the flow in Extruder under high pressure enough heat and fluidity for deformation to pipes and a drying process during their passage through the post press are subject to correspondingly high pressure, so that these tubes come out when they exit the extruder has sufficient stability for storage and subsequent transport exhibit. These pipes made from waste products are characterized by their stability at high temperatures and can be manufactured cheaply in an extruder. The stability at high temperatures allows longer immersion of the Pipes in molten steel, making accurate temperature measurements with thermometers let carry out, which are protected by tubes produced according to the invention.

Claims (1)

Patentanspruch: Verfahren zur Herstellung von Schutzrohren für Thermometer in Stahlschmelzen mittels Extruder, dadurch gekennzeichnet, daß Fangstoffe, die bei der Fabrikation von Papier, Zellstoffen od. dgl. als Abfallprodukte anfallen, in einer Vorpresse (2) erwärmt und nach Durchdringen eines siebartigen Widerstandes (5) in einer Nachpresse (6) mit nachgeschaltetem Mundstück (7) unter einem dem Trocknungsvorgang entsprechend hohen Druck extrudiert werden. Claim: Process for the production of protective tubes for thermometers in molten steel by means of an extruder, characterized in that capture materials, the incurred as waste products in the manufacture of paper, cellulose or the like, heated in a pre-press (2) and after penetrating a sieve-like resistance (5) in a secondary press (6) with a downstream Mouthpiece (7) under a drying process be extruded according to high pressure. In Betracht gezogene Druckschriften: Deutsches Gebrauchsmuster Nr. 1 842 526; USA.-Patentschriften Nr. 2993 944, 2 999 121; Archiv für technisches Messen, März 1960, Seiten R25bisR27. Considered publications: German utility model no. 1,842,526; U.S. Patent Nos. 2993,944, 2,999,121; Archive for technical Messen, March 1960, pages R25 to R27.
DE1964B0079446 1964-11-21 1964-11-21 Process for the production of protective tubes for thermometers Pending DE1274379B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1964B0079446 DE1274379B (en) 1964-11-21 1964-11-21 Process for the production of protective tubes for thermometers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1964B0079446 DE1274379B (en) 1964-11-21 1964-11-21 Process for the production of protective tubes for thermometers

Publications (1)

Publication Number Publication Date
DE1274379B true DE1274379B (en) 1968-08-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1548415A1 (en) * 2003-12-17 2005-06-29 Heraeus Electro-Nite International N.V. Sleeve for sensor for measurements in liquid such as liquid metals
CN111337155A (en) * 2020-03-20 2020-06-26 中国核动力研究设计院 Connect shell formula to solidify temperature measuring device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2993944A (en) * 1960-04-12 1961-07-25 Electro Nite Engineering Compa Expendable thermocouple
US2999121A (en) * 1958-05-14 1961-09-05 Leeds & Northrup Co Fast acting totally expendable immersion thermocouple
DE1842526U (en) * 1961-06-20 1961-11-30 Degussa Immersion thermocouple for temperature measurements of molten metal.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2999121A (en) * 1958-05-14 1961-09-05 Leeds & Northrup Co Fast acting totally expendable immersion thermocouple
US2993944A (en) * 1960-04-12 1961-07-25 Electro Nite Engineering Compa Expendable thermocouple
DE1842526U (en) * 1961-06-20 1961-11-30 Degussa Immersion thermocouple for temperature measurements of molten metal.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1548415A1 (en) * 2003-12-17 2005-06-29 Heraeus Electro-Nite International N.V. Sleeve for sensor for measurements in liquid such as liquid metals
US7488350B2 (en) 2003-12-17 2009-02-10 Heraeus Electro-Nite International N.V. Carrier tube for sensors
CN111337155A (en) * 2020-03-20 2020-06-26 中国核动力研究设计院 Connect shell formula to solidify temperature measuring device

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