DE839664C - Process for the production of electrical lines with mineral insulation - Google Patents

Process for the production of electrical lines with mineral insulation

Info

Publication number
DE839664C
DE839664C DEP12199A DEP0012199A DE839664C DE 839664 C DE839664 C DE 839664C DE P12199 A DEP12199 A DE P12199A DE P0012199 A DEP0012199 A DE P0012199A DE 839664 C DE839664 C DE 839664C
Authority
DE
Germany
Prior art keywords
production
conductors
binder
jacket
electrical lines
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
DEP12199A
Other languages
German (de)
Inventor
Wolfgang Albrecht
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to DEP12199A priority Critical patent/DE839664C/en
Application granted granted Critical
Publication of DE839664C publication Critical patent/DE839664C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/16—Rigid-tube cables

Landscapes

  • Superconductors And Manufacturing Methods Therefor (AREA)

Description

Verfahren zur Herstellung elektrischer Leitungen mit mineralischer Isolierung die der Isolierstoff verdichtet wird. Es ist auch bekannt, die Leiter in dem äußeren Rohr achsparallel auszuspannen und in dieses dann die Isoliermasse in Pulverform einzufüllen. Auch in diesem Fall erfolgt dann in der Regel ein querschnittvermindernder Streckprozeß. Weiter ist auch ein Vorschlag bekanntgeworden, die -pulverförmige Masse mittels einer archimedischen Schraube durch eine Ziehdüse hindurchzupressen,durch die der Leiter zentrisch hindurchgezogen wird, und unmittelbar nach dem Verlassen der Düse einen metallischen Mantel auf sie Isolierung aufzubringen. Dieses Gebilde wird keiner weiteren Behandlung mehr unterworfen. Bei diesem Verfahren muß aber darauf geachtet werden, daß der Mantel unmittelbar nach dem Austritt der Isoliermasse .mit demrLeiter aus eines Metallbandes oder auf andere Weise erfolgen kann. Hierauf wird der Rohling in Strang- oder Ringform gegebenenfalls in mehreren Stufen in einem Anwärm- oder Glühofen getrocknet oder geglüht. Je nach Art und Bestimmung des Rohlings ist die Glühtemperatur und Glühzeit zu wählen. Der Glühl>rozeß hat den Zweck, die Trocknung der keramisclien Isoliermasse zu bewirken. Bei Leitungen, die nur normalen Betriebstetnheraturen ausgesetzt «erden, genügt unter Umständen eine Trocknungstemperatur von etwa 200° C. Dagegen müssen Rohlinge, die zur Herstellung von Leitungen dienen, die höheren Betriebstemperaturen ausgesetzt werden sollen, wie 1ieisl>ielsweise Heizelemente od. dgl., bei wesentlich höheren Temperaturen bis zu etwa goo° C geglüht werden, um alle in der mineralischen Isoliermasse vorhandenen flüchtigen Bestandteile möglichst restlos zu beseitigen. Der so vorbehandelte Rohling wird dann in bekannter Weise unter Einschaltung von Zwischenglühungen durch Walzen, Pressen, Hämmern oder Ziehen auf den gewünschten Durchmesser gebracht.Process for the production of electrical lines with mineral insulation which the insulating material is compressed. It is also known to unclamp the conductors in the outer tube parallel to the axis and then to fill this with the insulating compound in powder form. In this case, too, a cross-section-reducing stretching process then usually takes place. Furthermore, a proposal has also become known to press the powdery mass by means of an Archimedean screw through a drawing nozzle through which the conductor is drawn centrally, and to apply a metallic jacket to it insulation immediately after leaving the nozzle. This structure is no longer subjected to any further treatment. With this method, however, care must be taken that the jacket .mit demrLeiter immediately after the exit of the insulating compound a metal band or in some other way. The blank is then dried or annealed in a strand or ring shape, optionally in several stages, in a heating or annealing furnace. The annealing temperature and annealing time must be selected depending on the type and purpose of the blank. The purpose of the annealing process is to dry the ceramic insulating compound. In the case of lines that are only exposed to normal operating temperatures, a drying temperature of around 200 ° C. may be sufficient. be annealed at much higher temperatures up to about goo ° C in order to remove as completely as possible all of the volatile constituents present in the mineral insulating compound. The blank pretreated in this way is then brought to the desired diameter in a known manner with the inclusion of intermediate annealing by rolling, pressing, hammering or drawing.

Claims (3)

PATENTANSPRÜCHE: Verfabren zur Herstellung elektrischer Leitungen mit innerhalb eines metallischen Mantels in pulverförmige keramische Isoliermas,se eingebetteten Leitern, wobei das keramische Pulver um den bzw. um die Leiter herum,gepreßt wird, dadurch gekennzeichnet, daß das keramische Pulver zunächst .mit einem Bindemittel versetzt, mittels einer Stra,ngpresse um den bzw. die Leiter herumgepreßt, anschließend vor oder nach dem Einbringen in den äußeren Mantel durch Wärmebehandlung getrocknet und danach der mit dem Mantel versehene Rohling einem querschnittvermindernden Streckprozeß unterworfen wird. PATENT CLAIMS: Process for the production of electrical cables with inside a metallic jacket in powdery ceramic insulating material, se embedded conductors, the ceramic powder being pressed around or around the conductors is, characterized in that the ceramic powder initially .mit a binder offset, pressed around the conductor or conductors by means of a straightening press, then dried by heat treatment before or after being introduced into the outer jacket and then the blank provided with the jacket is subjected to a cross-section-reducing stretching process is subjected. 2. Verfahren nach Anspruc'li i, dadurch gekennzeichnet, @daß als Bindemittel Wasser, dem gegebenenfalls geeignete Benetzun'gsmi.ttel zugesetzt sein .können, dient. 2. The method according to Anspruc'li i, characterized in that @ that as Binder water, to which, if necessary, suitable wetting agents can be added .can serve. 3. Verfahren nach Anspruch r, d@aduich gekennzeichnet, daß als Bindemittel 01 verwendet wird.3. The method according to claim r, d @ aduich characterized in that 01 is used as a binder.
DEP12199A 1948-10-02 1948-10-02 Process for the production of electrical lines with mineral insulation Expired DE839664C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP12199A DE839664C (en) 1948-10-02 1948-10-02 Process for the production of electrical lines with mineral insulation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP12199A DE839664C (en) 1948-10-02 1948-10-02 Process for the production of electrical lines with mineral insulation

Publications (1)

Publication Number Publication Date
DE839664C true DE839664C (en) 1952-05-23

Family

ID=7363929

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP12199A Expired DE839664C (en) 1948-10-02 1948-10-02 Process for the production of electrical lines with mineral insulation

Country Status (1)

Country Link
DE (1) DE839664C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1012349B (en) * 1954-03-12 1957-07-18 British Insulated Callenders Method of manufacturing an electrical cable
DE3225958A1 (en) * 1982-06-24 1984-01-12 Viktor Timofeevič Golovkin Method for the production of multi-core cables and devices for carrying it out
WO1993005520A1 (en) * 1991-09-09 1993-03-18 American Technology, Inc. Spinel insulated electrical components and method for making same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1012349B (en) * 1954-03-12 1957-07-18 British Insulated Callenders Method of manufacturing an electrical cable
DE3225958A1 (en) * 1982-06-24 1984-01-12 Viktor Timofeevič Golovkin Method for the production of multi-core cables and devices for carrying it out
WO1993005520A1 (en) * 1991-09-09 1993-03-18 American Technology, Inc. Spinel insulated electrical components and method for making same

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