EP0010275A1 - Tubular heating element - Google Patents

Tubular heating element Download PDF

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Publication number
EP0010275A1
EP0010275A1 EP79103944A EP79103944A EP0010275A1 EP 0010275 A1 EP0010275 A1 EP 0010275A1 EP 79103944 A EP79103944 A EP 79103944A EP 79103944 A EP79103944 A EP 79103944A EP 0010275 A1 EP0010275 A1 EP 0010275A1
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EP
European Patent Office
Prior art keywords
insulating
bead
heating element
tubular
insulating material
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.)
Granted
Application number
EP79103944A
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German (de)
French (fr)
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EP0010275B1 (en
Inventor
Uwe Neumann
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.)
ELPAG AG CHUR
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ELPAG AG CHUR
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6052145&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0010275(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ELPAG AG CHUR filed Critical ELPAG AG CHUR
Priority to AT79103944T priority Critical patent/ATE82T1/en
Publication of EP0010275A1 publication Critical patent/EP0010275A1/en
Application granted granted Critical
Publication of EP0010275B1 publication Critical patent/EP0010275B1/en
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    • 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

Definitions

  • the invention relates to a tubular heater, in which a heating coil is embedded in insulating material in a jacket tube made of deformable metal, which is connected at the connection ends to connection bolts and in which the connection bolts are passed through insulating beads inserted into the ends of the jacket tube.
  • a tubular heating element of the type mentioned at the outset is known, in which the insulating beads are glued into the inner wall of the tubular casing end by means of an adhesive. In this way it is prevented that moisture can get inside the tubular heating element and the insulating effect of the insulating material is reduced.
  • this known tubular heating element has the disadvantage that, due to the use of an adhesive, there is only a limited temperature resistance of the tubular heating element.
  • a tubular heater end seal is also known, in which the seal is made by means of a temperature-resistant glaze. With such a glaze seal, however, there is a risk that it will tear as a result of large temperature fluctuations and consequently an un sufficient sealing against moisture.
  • the insulation effect can be reduced by a residual moisture remaining in the interior of the tubular heating element during manufacture, since the residual moisture cannot escape from the tubular heating element due to the moisture-tight seal.
  • the object is achieved according to the invention by the combination of a mechanical holder provided for the insulating bead, which is formed by the tubular heating element itself, and an insulating material impregnated with a silicone oil or the like in a manner known per se.
  • a further advantageous embodiment of the invention can be seen in the fact that the mechanical holder is formed by pinching or constricting the casing tube.
  • the tubular heating element on the one hand, has a very high temperature resistance of about 600 ° C due to the mechanical holder and, on the other hand, is no longer exposed to any impairment of its insulation effect by moisture.
  • the production is extremely easy to carry out, since it is no longer necessary to glue or pour in an end seal.
  • an electric tubular heater has a jacket tube 1, in which there is a heating coil 3 embedded in insulating material 2 soaked in silicone oil.
  • a connecting pin 4 is provided, which can be connected to an electrical power source, not shown.
  • the connecting bolt 4 also has a part with a larger diameter and a part with a smaller diameter.
  • the bolt part with a larger diameter is embedded in the insulating material 2 and electrically connected to the heating coil 3, while the subsequent bolt part with a small diameter runs a bit in the casing tube 1 and then protrudes from the tubular heating element for connection to a power source.
  • the Gerschn ⁇ ttsprung of the connecting bolt 4 is thus in one plane with the insulating material.
  • an insulating bead 5 with a corresponding through hole is pushed in part over the small-diameter bolt part until the cross-sectional jump of the connecting bolt 4.
  • the graduated insulating bead 5 has approximately the same outer diameter as that on the side facing the insulating material 2 Insulation material.
  • a locking ring 6 is pushed onto the connecting pin 4 following the insulating bead.
  • the connecting bolt 4 is pressed off when the insulating bead 5 is firmly pushed on in the vicinity of the securing ring 6.
  • the locking ring 6 is pressed in the direction of the inside of the tubular heater and thus the insulating bead is pressed against the insulating material.
  • connection bolt 4 attains a certain strength with respect to the casing tube 1
  • the exemplary embodiment shown in FIG. 2 differs from the one mentioned above only in that a triangular bead 8 is used instead of a round bead 5.

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  • Resistance Heating (AREA)

Abstract

1. A tubular heater having a heating coil (3) embedded in insulating material (2) within a tubular jacket (1) of deformable metal, the terminals of said heating coil being connected to terminal bolts (4) having a bolt portion of greater diameter embedded in insulating material (2) and a bolt portion of lesser diameter passing through an insulating bead inserted at the end face of the tubular jacket (1) and mechanically supported by said tubular jacket, characterized by the combination of features that - the insulating bead (5) is formed with a stepped diameter and the portion of the insulating bead (5) having the greater diameter is held pressed between two constrictions or indentations (7) of the tubular jacket (1), - the portion of the terminal bolt (4) projecting from the insulating bead (5) is provided with a pressure-flattened portion holding the insulating bead (5) pressed in the direction of the inner side of said tubular heater, - the insulating material (2) is impregnated in known manner with a silicone oil or the like.

Description

Die Erfindung betrifft einen Rohrheizkörper, bei dem in einem Mantelrohr aus verformbaren Metall eine Heizwendel in Isoliermaterial eingebettet ist, die an den Anschlußenden mit Anschlußbolzen verbunden ist und bei dem die Anschlußbolzen durch in die Stirnenden des Mantelrohres eingesetzte Isolierperlen hindurchgeführt sind.The invention relates to a tubular heater, in which a heating coil is embedded in insulating material in a jacket tube made of deformable metal, which is connected at the connection ends to connection bolts and in which the connection bolts are passed through insulating beads inserted into the ends of the jacket tube.

Es ist beispielsweise ein Rohrheizkörper der eingangs genannten Art bekannt, bei dem die Isolierperlen mittels eines Klebers in die Innenwandung des Mantelrohrabschlusses eingeklebt sind. Auf diese Weise wird verhindert, daß Feuchtigkeit in das Innere des Rohrheizkörpers gelangen kann und die Isolationswirkung des Isoliermaterials herabgesetzt wird.For example, a tubular heating element of the type mentioned at the outset is known, in which the insulating beads are glued into the inner wall of the tubular casing end by means of an adhesive. In this way it is prevented that moisture can get inside the tubular heating element and the insulating effect of the insulating material is reduced.

Dieser bekannte Rohrheizkorper weist jedoch den Nachteil auf, daß infolge der Verwendung eines Klebers nur eine beschränkte Temperaturbeständigkeit des Rohrheizkorpers gegeben ist.However, this known tubular heating element has the disadvantage that, due to the use of an adhesive, there is only a limited temperature resistance of the tubular heating element.

Es ist weiterhin eine Rohrheizkorperendenabdichtung bekannt, bei der die Abdichtung mittels einer temperaturbeständigen Glasur erfolgt. Bei einer derartigen Glasurabdichtung besteht jedoch die Gefahr, daß diese infolge großer Temperaturschwankungen reißt und demzufolge eine ungenügende Abdichtung gegenüber Feuchtigkeit darstellt.A tubular heater end seal is also known, in which the seal is made by means of a temperature-resistant glaze. With such a glaze seal, however, there is a risk that it will tear as a result of large temperature fluctuations and consequently an un sufficient sealing against moisture.

Andererseits kann bei beiden vorerwähnten Rohrheizkörperendenabdichtungen die Isolationswirkung durch eine im Rohrheizkörperinneren bei der Herstellung verbliebene Restfeuchtigkeit herabgesetzt sein, da die Restfeuchtigkeit durch den feuchtigkeitsdichten Abschluß nicht aus dem Rohrheizkörper entweichen kann.On the other hand, in both of the above-mentioned tubular heating element end seals, the insulation effect can be reduced by a residual moisture remaining in the interior of the tubular heating element during manufacture, since the residual moisture cannot escape from the tubular heating element due to the moisture-tight seal.

Es ist somit Aufgabe der Erfindung, einen Rohrheizkörper zu schaffen, der einerseits keine Beeinträchtigung seiner Isolation infolge von Feuchtigkeitseinwirkungen auf das Isolationsmaterial erleidet und anderer-, seits eine hohe Temperaturbeständigkeit aufweist.It is therefore an object of the invention to provide a tubular heating element which, on the one hand, does not suffer any deterioration in its insulation as a result of the effects of moisture on the insulation material and, on the other hand, has a high temperature resistance.

Die Aufgabe wird erfindungsgemäß gelöst durch die Kombination einer für die Isolierperle vorgesehenen mechanischen Halterung, die vom Rohrheizkörper selbst gebildet ist und einem, mit einem Siliconöl oder dgl. in an sich bekannter Weise durchtränkten Isoliermaterial.The object is achieved according to the invention by the combination of a mechanical holder provided for the insulating bead, which is formed by the tubular heating element itself, and an insulating material impregnated with a silicone oil or the like in a manner known per se.

Eine weitere vorteilhafte Ausgestaltung der Erfindung ist darin zu sehen, daß die mechanische Halterung durch Einquetschungen bzw. Einschnürungen des Mantelrohres gebildet ist.A further advantageous embodiment of the invention can be seen in the fact that the mechanical holder is formed by pinching or constricting the casing tube.

Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere darin, daß der Rohrheizkörper einerseits infolge der mechanischen Halterung eine sehr hohe Temperaturbeständigkeit von etwa 600° C aufweist und andererseits keinerBeeinträchtigung seiner Isolationswirkung durch Feuchtigkeit mehr ausgesetzt ist. Zudem kommt hinzu, daß die Herstellung - da ja kein Einkleben bzw. Eingießen einer Endenabdichtung mehr erforderlich ist - äußerst einfach durchführbar ist.The advantages that can be achieved with the invention are, in particular, that the tubular heating element, on the one hand, has a very high temperature resistance of about 600 ° C due to the mechanical holder and, on the other hand, is no longer exposed to any impairment of its insulation effect by moisture. In addition, the production is extremely easy to carry out, since it is no longer necessary to glue or pour in an end seal.

Die Erfindung wird im folgenden anhand der Zeichnungen näher erläutert. Es zeigen:

  • Fig. 1 ein Ausführungsbeispiel eines Rohrheizkörperendenabschlusses, wobei die Isolierperle einen runden Querschnitt aufweist und
  • Fig. 2 das Ausführungsbeispiel gemäß Fig. 1, wobei jedoch die Isolierperle einen dreieckförmigen Querschnitt aufwei st .
The invention is explained in more detail below with reference to the drawings. Show it:
  • Fig. 1 shows an embodiment of a tubular radiator end, the insulating bead has a round cross section and
  • Fig. 2 shows the embodiment of FIG. 1, but the insulating bead has a triangular cross-section.

Wie in Fig. 1 dargestellt, weist ein elektrischer Rohrheizkörper ein Mantelrohr 1 auf, in dem sich eine in Siliconöl durchtränktem Isoliermaterial 2 eingebettete Heizwendel 3 befindet. An dem Ende der Heizwendel 3 ist ein Anschlußbolzen 4 vorgesehen, der mit einer nicht gezeigten elektrischen Stromquelle verbunden werden kann. Der Anschlußbolzen 4 weist zudem einen Teil mit größerem Durchmesser und einen Teil mit kleinerem Durchmesser auf. Der Bolzenteil mit größerem Durchmesser ist im Isoliermaterial 2 eingebettet und mit der Heizwendel 3 elektrisch verbunden, während der sich anschließende Bolzenteil mit kleinem Durchmesser ein Stück im Mantelrohr 1 verläuft und anschließend aus dem Rohrheizkörper zur Verbindung mit einer Stromquelle herausragt. Der Guerschnìttsprung des Anschlußbolzens 4 liegt somit in einer Ebene mit dem Isoliermaterialabschluß.As shown in FIG. 1, an electric tubular heater has a jacket tube 1, in which there is a heating coil 3 embedded in insulating material 2 soaked in silicone oil. At the end of the heating coil 3, a connecting pin 4 is provided, which can be connected to an electrical power source, not shown. The connecting bolt 4 also has a part with a larger diameter and a part with a smaller diameter. The bolt part with a larger diameter is embedded in the insulating material 2 and electrically connected to the heating coil 3, while the subsequent bolt part with a small diameter runs a bit in the casing tube 1 and then protrudes from the tubular heating element for connection to a power source. The Gerschnìttsprung of the connecting bolt 4 is thus in one plane with the insulating material.

Um eine Isolierung des Anschlußbolzens 4 gegenüber dem Mantelrohr 2 zu gewährleisten, ist über dem Bolzenteil mit kleinem Durchmesser zum Teil eine Isolierperle 5 mit einem entsprechenden Durchgangsloch bis zum Querschnittsprung des Anschlußbolzens 4 aufgeschoben. Die im Durchmesser abgestufte Isolierperle 5 weist auf der dem Isoliermaterial 2 zugekehrten Seite etwa gleichen Außendurchmesser wie das Isoliermaterial auf. Weiterhin ist ein Sicherungsring 6 im Anschluß an die Isolierperle auf den Anschlußbolzen 4 aufgeschoben. Um ein Verschieben der Isolierperle 5 zu verhindern, ist bei fest aufgeschobener Isolierperle 5 in Nähe des Sicherungsringes 6 der Anschlußbolzen 4 abgedrückt. Demzufolge wird der Sicherungsring 6 in Richtung der Rohrheizkörperinnenseite und somit die Isolierperle gegen das Isoliermaterial gepreßt.In order to ensure insulation of the connecting bolt 4 with respect to the casing tube 2, an insulating bead 5 with a corresponding through hole is pushed in part over the small-diameter bolt part until the cross-sectional jump of the connecting bolt 4. The graduated insulating bead 5 has approximately the same outer diameter as that on the side facing the insulating material 2 Insulation material. Furthermore, a locking ring 6 is pushed onto the connecting pin 4 following the insulating bead. In order to prevent the insulating bead 5 from shifting, the connecting bolt 4 is pressed off when the insulating bead 5 is firmly pushed on in the vicinity of the securing ring 6. As a result, the locking ring 6 is pressed in the direction of the inside of the tubular heater and thus the insulating bead is pressed against the insulating material.

Damit der Anschlußbolzen 4 insgesamt eine gewisse Festigkeit gegenüber dem Mantelrohr 1 erlangt, ist der einen größeren Durchmesser aufweisende Teil der Isolierperle 5 zwischen zwei Einschnürungen =_ bzw. Einquetschungen des Mantelrohres eingepreßt. Da durch Verwendung eines siliconöldurchtränkten Isoliermaterials 2 eine mechanische Halterung 7 der Isolierperle ausreichend ist, kann jederzeit eine im Mantelrohr befindliche Restfeuchtigkeit nach außen entweichen.So that the connection bolt 4 attains a certain strength with respect to the casing tube 1, the larger diameter part of the insulating bead 5 is pressed in between two constrictions = or pinches of the casing tube. Since a mechanical holder 7 of the insulating bead is sufficient by using an insulating material 2 impregnated with silicone oil, any residual moisture present in the jacket tube can escape to the outside at any time.

Das in Fig. 2 dargestellte Ausführungsbeispiel unterscheidet sich von dem oben erwähnten nur insoweit, daß anstelle einer Rundperle 5 eine Dreieckperle 8 Anwendung findet.The exemplary embodiment shown in FIG. 2 differs from the one mentioned above only in that a triangular bead 8 is used instead of a round bead 5.

Claims (2)

1. Rohrheizkörper, bei dem in einem Mantelrohr aus verformbarem Metall eine Heizwendel in Isoliermaterial eingebettet ist, die an den Anschlußenden mit Anschlußbolzen verbunden ist und bei dem die Anschlußbolzen durch in die Stirnenden des Mantelrohres eingesetzte Isolierperlen hindurchgeführt sind, gekennzeichnet durch die Kombination einer für die Isolierperle (5) vorgesehenen, sowie vom Rohrheizkörper selbst gebildeten mechanischen Halterung (7) und einem , mit einem Silconöl oder dgl. in an sich bekannter Weise durchtränkten Isoliermaterial (2).1. Tubular heating element, in which a heating coil is embedded in insulating material in a jacket tube made of deformable metal, which is connected at the connection ends to connection bolts and in which the connection bolts are passed through insulating beads inserted into the ends of the jacket tube, characterized by the combination of one for the Insulating bead (5) provided, as well as mechanical holder (7) formed by the tubular heating element itself and an insulating material (2) impregnated with a silicone oil or the like in a manner known per se. 2. Rohrheizkörper nach Anspruch 1, dadurch gekennzeichnet, daß die mechanische Halterung (7) der Isolierperle (5) durch Einquetschungen bzw. Einschnürungen des Mantelrohres gebildet ist.2. Tubular heating element according to claim 1, characterized in that the mechanical holder (7) of the insulating bead (5) is formed by pinching or constricting the casing tube.
EP79103944A 1978-10-13 1979-10-12 Tubular heating element Expired EP0010275B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79103944T ATE82T1 (en) 1978-10-13 1979-10-12 TUBULAR HEATING ELEMENT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782844714 DE2844714A1 (en) 1978-10-13 1978-10-13 END SEAL FOR AN ELECTRIC PIPE RADIATOR
DE2844714 1978-10-13

Publications (2)

Publication Number Publication Date
EP0010275A1 true EP0010275A1 (en) 1980-04-30
EP0010275B1 EP0010275B1 (en) 1981-06-10

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ID=6052145

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Application Number Title Priority Date Filing Date
EP79103944A Expired EP0010275B1 (en) 1978-10-13 1979-10-12 Tubular heating element

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EP (1) EP0010275B1 (en)
AT (1) ATE82T1 (en)
DE (2) DE2844714A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0086465A1 (en) * 1982-02-12 1983-08-24 Elpag Ag Chur Cartridge heater with an overload cut-out
EP0157182A1 (en) * 1984-03-01 1985-10-09 Elpag Ag Chur Tubular heating body
EP0858084A1 (en) * 1997-02-07 1998-08-12 I.R.C.A. S.p.a. Industria Resistenze Corazzate e Affini Method for constructing armoured resistance elements, and resistance element obtained by the method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8910145U1 (en) * 1989-08-24 1989-10-05 Fritz Eichenauer GmbH & Co. KG Fabrik elektr. Spezialartikel, 6744 Kandel Electric tubular heater connection for two separate heating outputs

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2046102A (en) * 1931-07-30 1936-06-30 Gen Electric Electric terminal connection
FR803095A (en) * 1935-09-20 1936-09-22 Improvements to electrothermal devices
DE1615424A1 (en) * 1967-12-19 1970-06-04 Siemens Elektrogeraete Gmbh Electric tubular heater
DE2410451A1 (en) * 1974-03-05 1975-09-11 Eichenauer Fa Fritz Damp-proof seal for tubular, electric, heating elements - has a tubular plastic stopper and a dielectric barrier liq.
DE2531529A1 (en) * 1975-07-15 1977-02-24 Stiebel Eltron Gmbh & Co Kg Tubular electrical heater impermeable to external humidity - has plastics end plug seals permitting relief of internal pressurised vapour

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2046102A (en) * 1931-07-30 1936-06-30 Gen Electric Electric terminal connection
FR803095A (en) * 1935-09-20 1936-09-22 Improvements to electrothermal devices
DE1615424A1 (en) * 1967-12-19 1970-06-04 Siemens Elektrogeraete Gmbh Electric tubular heater
DE2410451A1 (en) * 1974-03-05 1975-09-11 Eichenauer Fa Fritz Damp-proof seal for tubular, electric, heating elements - has a tubular plastic stopper and a dielectric barrier liq.
DE2531529A1 (en) * 1975-07-15 1977-02-24 Stiebel Eltron Gmbh & Co Kg Tubular electrical heater impermeable to external humidity - has plastics end plug seals permitting relief of internal pressurised vapour

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0086465A1 (en) * 1982-02-12 1983-08-24 Elpag Ag Chur Cartridge heater with an overload cut-out
EP0157182A1 (en) * 1984-03-01 1985-10-09 Elpag Ag Chur Tubular heating body
EP0858084A1 (en) * 1997-02-07 1998-08-12 I.R.C.A. S.p.a. Industria Resistenze Corazzate e Affini Method for constructing armoured resistance elements, and resistance element obtained by the method

Also Published As

Publication number Publication date
DE2844714A1 (en) 1980-04-24
ATE82T1 (en) 1981-06-15
DE7830574U1 (en) 1983-07-28
EP0010275B1 (en) 1981-06-10

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