DE2410128A1 - Damp-proof tube closure for tubular heating elements - has elastic sealing stoppers in ends of tube containing helical heating element - Google Patents

Damp-proof tube closure for tubular heating elements - has elastic sealing stoppers in ends of tube containing helical heating element

Info

Publication number
DE2410128A1
DE2410128A1 DE2410128A DE2410128A DE2410128A1 DE 2410128 A1 DE2410128 A1 DE 2410128A1 DE 2410128 A DE2410128 A DE 2410128A DE 2410128 A DE2410128 A DE 2410128A DE 2410128 A1 DE2410128 A1 DE 2410128A1
Authority
DE
Germany
Prior art keywords
tube
heating element
proof
damp
plug
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
DE2410128A
Other languages
German (de)
Inventor
Guenter Geist
Eugen Leupold
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE2410128A priority Critical patent/DE2410128A1/en
Publication of DE2410128A1 publication Critical patent/DE2410128A1/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material

Landscapes

  • Resistance Heating (AREA)

Abstract

The damp-proof tube closure, for tubular heating elements, has the helical heating element axially inside the tube and attached at its ends to contact pins passing through insulating stoppers in the ends of the tube. The stoppers are elastic and slightly tapered so that they fit tightly into the tube ends and prevent the moisture entering the region around the heating filament. The heating filament is further completely sealed in an insulating matl. that occupies the whole of the tube. This structure reduces the number of stages required to manufacture such a tubular heating element.

Description

Verfahren zur Herstellung eines feuchtigkeitsdichten Mantelrohrverschlusses bei elektrischen Mantelrohrheizstäben Die Erfindung betrifft ein Verfahren zur Herstellung eines feuchtigkeitsdichten flantelrohrverschlusses bei elektrischen Mantelrohrheizstäben mit einem das Mantelrohr nach außen abschließenden Pfropfen aus elastischem Isoliermaterial sowie mit einem in Isoliermasse eingebetteten Heizleiter und der Mantelrohrquerschnitt zwecks Verdichtung der Isoliermasse durch Walzen oder dgl. reduziert wird. Process for the production of a moisture-proof jacket pipe closure in electrical jacket tube heating rods The invention relates to a method for production a moisture-proof flared tube closure for electric tubular heating rods with a plug made of elastic insulating material that closes off the casing tube towards the outside as well as with a heating conductor embedded in insulating compound and the jacket pipe cross-section is reduced by rolling or the like for the purpose of compaction of the insulating compound.

Bei der Herstellung des feuchtigkeitsdichten Mantelrohrverschlusses verwendet man in der Regel Pfropfen aus Silicongummi, deren Außendurchmesser vor dem Eindrücken größer als der Innendurchmesser des Mantelrohres ist. Durch die elastische Verformung beim Eindrücken der Pfropfen in das Anschlußende des Mantelrohrheizstabes läßt sich eine praktisch ausreichende Dichtigkeit gegenüber Feuchtigkeit erzielen. Störend ist hierbei jedoch der mit dem Einpressen der Pfropfen verbundene zusätzliche fertigungstechnische Aufwand, insbesondere an hierzu erforderlichen speziellen Vorrichtungen. Des weiteren ergibt sich bei diesem Fertigungsverfahren der Nachteil, daß beim Einpressen der Pfropfen Luftblasen zwischen der Isoliermasse und den eingepreßten Pfropfen eingeschlossen werden, wodurch die elektrischen Eigenschaften des fertigen Mantelrohrheizstabes beeinträchtigt werden.During the production of the moisture-proof jacket pipe closure silicone rubber plugs are usually used, their outside diameter is larger than the inside diameter of the jacket pipe before pressing. Through the elastic deformation when the plug is pressed into the connecting end of the tubular heating rod practically sufficient impermeability to moisture can be achieved. However, the additional problem associated with pressing in the plugs is a nuisance Manufacturing effort, in particular on the special devices required for this. Furthermore, this manufacturing process has the disadvantage that when it is pressed in the plug air bubbles between the insulating compound and the pressed plug are included, whereby the electrical properties of the finished tubular heating rod be affected.

Der Erfindung liegt daher die Aufgabe zugrunde, den Fertigungsaufwand zum Einpressen des elastischen Abschlußpfropfens in das Anschlußende des Mantelrohrheizstabes zu verringern und dabei gleichzeitig eine höchstmögliche elektrische Sicherheit des fertigen Mantelrohrheizstabes zu erreichen..The invention is therefore based on the object of reducing the manufacturing costs for pressing the elastic plug into the connection end of the tubular heating rod and at the same time the highest possible electrical safety of the finished tubular heating element ..

Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Pfropfen aus elastischem Isoliermaterial vor dem Verdichten der Isoliermasse in das Mantelrohr eingebracht wird und daß dieser Pfropfen beim Reduzieren des Mantelrohrtuerschnittes gleichzeitig mit eingewalzt wird.The object is achieved according to the invention in that the Plug made of elastic insulating material before compacting the insulating mass in the jacket pipe is introduced and that this plug when reducing the jacket pipe door section is rolled in at the same time.

Durch diese Fertigungsmaßnahme wird die Herstellung des feuchtigkeitsdichten Mantelrohrverschlusses wesentlich vereinfacht und dabei eine erhebliche Zeiteinsparung erzielt.This manufacturing measure makes the production of the moisture-proof Casing pipe closure is significantly simplified and at the same time a considerable time saving achieved.

Der Pfropfen kann dabei in seinem Außendurchmesser etwas kleiner sein als es der Innendurchmesser des Mantelrohres ist, wodurch dieser sich leichter in das Mantelrohr einbringen läßt. Des weiteren ergibt sich der Vorteil, daß ein evtl.The plug can do something in its outer diameter smaller than the inside diameter of the jacket pipe, which makes it easier can be introduced into the jacket pipe. Furthermore, there is the advantage that a Possibly.

zwischen dem eingebrachten Pfropfen und der Isoliermasse vorhandener Hohlraum beim Reduzieren des Mantelrohrquerschnittes und somit Nachverdichten der Isoliermasse vollständig mit Isoliermasse ausgefüllt wird. Der eingepreßte elastische Pfropfen liegt danach vollkommen dicht an der Isoliermasse an, was sich auf die elektrischen Eigenschaften des fertigen Mantelrohrheizstabes günstig auswirkt.between the inserted plug and the insulating compound Cavity when reducing the jacket pipe cross-section and thus re-compacting the Insulating compound is completely filled with insulating compound. The pressed-in elastic The plug is then completely close to the insulating compound, which affects the electrical properties of the finished tubular heating rod has a beneficial effect.

In der Zeichnung ist ein nach dem vorgeschlagenen Verfahren hergestellter feuchtigkeitsdichter Mantelrohrabschluß eines elektrischen Mantelrohrheizstabes im Schnitt dargestellt.In the drawing is a manufactured according to the proposed method Moisture-proof jacket pipe termination of an electric jacket pipe heating rod shown in section.

Mit 1 ist dabei das Mantelrohr des Heizstabes bezeichnet, das einen in Isoliermasse 2 eingebetteten Heizleiter 3 umschließt. Dieser Mantelrohrheizstab ist mit einem aus elastischem Material bestehenden Pfropfen 4 feuchtigkeitsdicht verschlossen. Durch diesen Pfropfen ist das elektrische Anschlußende 5 des Heizleiters 3 nach außen geführt.With 1 the jacket tube of the heating rod is referred to, the one encloses heating conductor 3 embedded in insulating compound 2. This tubular heating rod is moisture-proof with a plug 4 made of elastic material locked. The electrical connection end 5 of the heating conductor is through this plug 3 outwards.

Claims (1)

Patentanspruch Claim Verfahren zur Herstellung eines feuchtigkeitsdichten Mantelrohrverschlusses bei elektrischen Mantelrohrheizstäben mit einem das Mantelrohr nach außen abschließenden Pfropfen aus elastischem Isoliermaterial sowie mit einem in Isoliermasse eingebetteten Heizleiter und der Mantelrohrquerschnitt zwecks Verdichtung der Isoliermasse durch Walzen oder dgl. reduziert wird, dadurch gekennzeichnet, daß der Pfropfen aus elastischem Isoliermaterial vor dem Verdichten der Isoliermasse in das Mantelrohr eingebracht wird und daß dieser Pfropfen beim Reduzieren des Mantelrohrquerschnittes gleichzeitig mit eingewalzt wird.Process for the production of a moisture-proof jacket pipe closure in the case of electric jacket-tube heating rods with one that closes the jacket tube to the outside Plug made of elastic insulating material and with one embedded in insulating compound Heating conductor and the jacket pipe cross-section for the purpose of compressing the insulating compound Rolling or the like. Is reduced, characterized in that the plug is made of elastic Insulation material introduced into the jacket pipe before the insulation material is compressed and that this plug when reducing the jacket pipe cross-section at the same time is rolled in.
DE2410128A 1974-03-02 1974-03-02 Damp-proof tube closure for tubular heating elements - has elastic sealing stoppers in ends of tube containing helical heating element Pending DE2410128A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2410128A DE2410128A1 (en) 1974-03-02 1974-03-02 Damp-proof tube closure for tubular heating elements - has elastic sealing stoppers in ends of tube containing helical heating element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2410128A DE2410128A1 (en) 1974-03-02 1974-03-02 Damp-proof tube closure for tubular heating elements - has elastic sealing stoppers in ends of tube containing helical heating element

Publications (1)

Publication Number Publication Date
DE2410128A1 true DE2410128A1 (en) 1975-09-11

Family

ID=5908963

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2410128A Pending DE2410128A1 (en) 1974-03-02 1974-03-02 Damp-proof tube closure for tubular heating elements - has elastic sealing stoppers in ends of tube containing helical heating element

Country Status (1)

Country Link
DE (1) DE2410128A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3701453A1 (en) * 1987-01-20 1988-07-28 Siemens Ag Electrical tubular heater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3701453A1 (en) * 1987-01-20 1988-07-28 Siemens Ag Electrical tubular heater

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