DE659017C - Process for the production of an electric tubular heating element with a helical heating resistor - Google Patents
Process for the production of an electric tubular heating element with a helical heating resistorInfo
- Publication number
- DE659017C DE659017C DEN35127D DEN0035127D DE659017C DE 659017 C DE659017 C DE 659017C DE N35127 D DEN35127 D DE N35127D DE N0035127 D DEN0035127 D DE N0035127D DE 659017 C DE659017 C DE 659017C
- Authority
- DE
- Germany
- Prior art keywords
- production
- tube
- helical
- electric tubular
- heating resistor
- 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
- 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
- Resistance Heating (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Herstellung eines elektrischen Rohrheizkörpers mit wendeiförmigem Heizwiderstand, welcher in einer von einem Metallmantel umgebenen Isoliermasse angeordnet ist.The invention relates to a method for producing an electric tubular heater with a helical heating resistor, which is surrounded by a metal jacket Isolating compound is arranged.
Es ist bereits bekannt, elektrische Rohrheizkörper mit einem geradlinigen Widerstandsdraht in der Weise herzustellen, daß ein Aggregat, das aus einem geschlossenen Metallrohr mit einem darin enthaltenen, von einer Masse umgebenen geradlinigen Draht besteht, einem Ziehvorgang oder dem Durchgang durch ein Zieheisen unterworfen wird. Dieses Verfahren kann nur auf geradlinige Widerstands drähte angewendet werden, weil bei wendeiförmigen Drähten zu befürchten ist, daß sich das Ziehen unregelmäßig abspielt oder die Windungenl zur Anlage aneinander gelangen, wodurch 'die -ganze Wirkung des Rohrheizkörpers verlorengeht.It is already known to produce electric tubular heating elements with a rectilinear resistance wire in such a way that an assembly consisting of a closed metal tube with a rectilinear wire contained therein, surrounded by a mass, is subjected to a drawing process or the passage through a drawing iron. This method can only be applied to straight resistance wires, because with helical wires it is to be feared that the pulling will be irregular or that the turns l come to rest against each other, whereby 'the whole effect of the tubular heater is lost.
An und für sich sind wendeiförmige Rohrheizwiderstände zweckmäßiger als geradlinige, weil mit den ersteren höhere Temperaturen erzeugt werden können.In and of themselves, helical tubular heating resistors are more useful than straight, because higher temperatures can be generated with the former.
Die angegebenen Nachteile bei Rohrheizkörpern mit wendeiförmigen Widerstandsdrähten werden durch das Verfahren gemäß der Erfindung beseitigt.The specified disadvantages in tubular heaters with helical resistance wires are made by the method according to the invention eliminated.
Das neue Verfahren zur Herstellung eines elektrischen Rohrheizkörpers mit wendeiförmigem Heizwiderstand, welcher ■ in einer von einem Metallmantel umgebenen Isoliermasse angeordnet ist, besteht darin, daß ein die Isoliermasse mit der in ihr eingebetteten Heizwendel umhüllender Mantel zu einem Rohr mit axialem Längsschlitz zusammengebogen wird, daß dieses Rohr in ein geschlossenes Metallrohr eingeschoben wird, und daß schließlich das äußere Metallrohr einem Ziehverfahren unterworfen wird, durch welches sein Durchmesser verringert und ein Druck auf den Mantel des inneren Metallrohres hervorgerufen wird.The new process for the production of an electric tubular heater with a helical Heating resistor, which ■ in an insulating compound surrounded by a metal jacket is arranged, consists in the fact that the insulating compound with the embedded in it Heating coil enveloping jacket bent together to form a tube with an axial longitudinal slot is that this tube is inserted into a closed metal tube, and that finally the outer metal tube is subjected to a drawing process by which its diameter is reduced and a pressure is exerted on the jacket of the inner metal pipe is caused.
Es wird darauf hingewiesen, ■ daß der axiale Längsschlitz das Entweichen der in der Isoliermasse verbliebenen Feuchtigkeit, ohne Beeinträchtigung" der Dichte des hergestellten Heizkörpers gestattet.It should be noted that ■ the axial longitudinal slot prevents the escape of the in the moisture remaining in the insulating compound without affecting the density of the manufactured Radiator permitted.
Die Fig. 1 .zeigt einen nach dem vorliegenden Verfahren hergestellten Heizkörper in teilweiser Fertigstellung und die Fig. 2 einen solchen in Fertigstellung.Fig. 1. Shows a heater manufactured according to the present method in partial completion and FIG. 2 such a completion.
In Fig. ι ist der Metallmantel 3 derart zu«. einem Rohr zusammengebogen, daß er den axialen Längsschnitt 3° aufweist; der Widerstandsdraht ist mit S bezeichnet.In Fig. Ι the metal jacket 3 is in such a way «. a tube bent together so that it has the axial longitudinal section 3 °; the resistance wire is denoted by S.
Der zylindrische Körper gemäß Fig. 1 erfährt eine Trocknung unter hoher Temperatur. The cylindrical body of Fig. 1 is subjected to high temperature drying.
Nach der Trocknung wird dieser zylindräsche Körper in ein geschlossenes Metallrohr 8 gemäß Fig. 2 gesteckt, das einem Ziehverfahren zur Verminderung seines Durchmessers und Anpressung an den zusammen- · gebogenen Metallmantel 3 unterworfen wird.After drying, it becomes cylindrical Body inserted into a closed metal tube 8 according to FIG. 2, which is a drawing process to reduce its diameter and to press it against the bent metal jacket 3 is subjected.
Das Verfahren gemäß der Erfindung ist nicht beschränkt auf zylindrische Heizkörper, sondern kann vorteilhaft auch bei viereckigen, rechtwinkligen, ovalen Ausführungen usw. Verwendung finden.The method according to the invention is not limited to cylindrical radiators, but can also be used advantageously for square, right-angled, oval designs, etc. Find.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEN35127D DE659017C (en) | Process for the production of an electric tubular heating element with a helical heating resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEN35127D DE659017C (en) | Process for the production of an electric tubular heating element with a helical heating resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE659017C true DE659017C (en) | 1938-04-22 |
Family
ID=7346937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEN35127D Expired DE659017C (en) | Process for the production of an electric tubular heating element with a helical heating resistor |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE659017C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2655305A1 (en) * | 1976-12-07 | 1978-06-08 | Tuerk & Hillinger Kg | Electric heating element for fluids - has two radial heat transfer fins formed by compressing oval metal tube around heating filament |
-
0
- DE DEN35127D patent/DE659017C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2655305A1 (en) * | 1976-12-07 | 1978-06-08 | Tuerk & Hillinger Kg | Electric heating element for fluids - has two radial heat transfer fins formed by compressing oval metal tube around heating filament |
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