EP3094158B1 - Heating cartridge - Google Patents

Heating cartridge Download PDF

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Publication number
EP3094158B1
EP3094158B1 EP16168183.8A EP16168183A EP3094158B1 EP 3094158 B1 EP3094158 B1 EP 3094158B1 EP 16168183 A EP16168183 A EP 16168183A EP 3094158 B1 EP3094158 B1 EP 3094158B1
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EP
European Patent Office
Prior art keywords
metal
jacket tube
section
casing pipe
connection
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Application number
EP16168183.8A
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German (de)
French (fr)
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EP3094158A1 (en
Inventor
Andreas Schlipf
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Tuerk and Hillinger GmbH
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Tuerk and Hillinger GmbH
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Publication of EP3094158A1 publication Critical patent/EP3094158A1/en
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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
    • H05B3/0014—Devices wherein the heating current flows through particular resistances
    • 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
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • 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
    • 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
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/014—Heaters using resistive wires or cables not provided for in H05B3/54

Definitions

  • Cartridges are electrical heaters in which the electrical heating element, e.g. can be realized by a resistance wire wound on a carrier or by a wound resistance wire, are arranged inside a metal jacket tube, which protects the electrical heating element from environmental influences.
  • the heat transport from the electrical heating element to the metal jacket can be provided, for example, by a good heat-conducting filler material, at least provided between the electrical heating element and the metal jacket tube, which is also electrically insulating, at least in the case of using resistance wires, such as e.g. Magnesium oxide or micanite plates can be guaranteed.
  • the jacket tube For a large number of applications, it is desirable for the jacket tube to be grounded by connecting it to a protective earth via a protective conductor.
  • the connection is made in particular by welding or soldering the protective conductor to the metal jacket tube.
  • the protective conductor is sometimes clamped onto the sheathed tube, but this also only enables fault-prone and relatively reliable electrical contacting.
  • a heating cartridge with a jacket tube made of metal and an electrical heating element is known that is arranged inside the jacket tube made of metal, in which there is a connecting lug connected to the jacket tube made of metal.
  • JP S55 33443 From the JP S55 33443 is also known a heating cartridge with a jacket tube made of metal and an electrical heating element which is arranged inside the jacket tube made of metal, which has on the opposite side of its connections a metal tongue with a hole passing through it.
  • a heating cartridge with the features of protection claim 1.
  • An advantageous development of the invention is the subject of the dependent claim.
  • the heating cartridge according to the invention like also known heating cartridges, has a jacket tube made of metal and an electrical heating element which is arranged inside the jacket tube made of metal.
  • the electric heating element can e.g. can be realized as a resistance wire wound on a carrier or as a wound resistance wire, a filler material preferably producing the heat-conducting contact between the electrical heating element and the jacket tube.
  • the term “jacket tube” does not mean that it is restricted to a tube with a circular cross section, so that the jacket tube can also have a different cross section, in particular an oval, polygonal or flat cross section.
  • connection lug can be arranged at one end of the casing tube.
  • it can have at least one section that projects beyond the edge of the metal jacket tube
  • connection lug can have at least one section in which it is formed by a section of the edge region of the metal jacket tube that through the tube wall of the casing pipe recesses is separated from a circumferentially adjacent section of the casing pipe made of metal and from a section adjacent to the circumferential direction of the casing pipe made of metal.
  • the section adjacent in the circumferential direction and the section adjacent against the circumferential direction can be directly connected to one another, that is to say they can merge into one another or be understood as a single section.
  • connection lug is not arranged at the edge but in the middle in a section of the wall surface of the metal casing tube. This can be achieved by punching out the connection lug from the wall surface or cutting it out, for example with a laser. The connecting lug can then be bent so that it is at an angle to the wall surface of the tubular casing.
  • a further possibility of realizing a connecting lugs arranged centrally in a section of the wall surface of the casing tube made of metal and at an angle thereto is to form the connection lug in one piece on the wall of the casing tube.
  • the connecting lug thus provides a structure which is connected in one piece to the jacket tube and with which a conductor, for example the protective conductor to the protective earth, can be connected in a simpler manner than to the otherwise unstructured jacket tube.
  • This connection can be achieved, for example, by crimping, riveting or screwing, but it is particularly advantageous if the connection lug is designed at least in its connection-side end section as a flat plug or round plug.
  • connection in particular when designing the connection as a flat or round plug, the electrical connection to be made and thus a potential source of error are saved by the connecting lug which is made in one piece with the tubular casing.
  • Figure 1 shows a heating cartridge 10 with a jacket tube 11 made of metal and an electrical heating element which is arranged inside the jacket tube 11 made of metal, which is why only the electrical supply lines 12, 13 leading into the interior of the jacket tube 11 made of metal are visible.
  • a connecting lug 14 which is integrally connected to the casing pipe 11 made of metal.
  • connection lug 14 has a section 14a which projects beyond the edge 11a of the metal casing tube 11. Furthermore, the connecting lug 14 has a section 14b, in which it is formed by a section of the edge region 11b of the jacket tube 11 made of metal, the recesses 15a, 15b penetrating through the tube wall of the jacket tube 11 made of metal from a section 11c of the jacket tube adjacent in the circumferential direction 11 made of metal and is separated from a section 11d of the jacket tube 11 made of metal, which section is adjacent to the circumferential direction.
  • Figure 2 shows the heating cartridge Figure 1 with a protective conductor 16 connected to the connecting lug 14, which establishes the connection to the protective earth.
  • the connection between terminal lug 14 and protective conductor 16 is established in this example by a crimped crimp sleeve 17. This crimp connection can be produced much more reliably than a crimp connection to the casing tube 11 made of metal itself, in particular because of the greater similarity of the dimensions of the connecting lug 14 and protective conductor 16.
  • FIG. 3 shows a heating cartridge 20 with a jacket tube 21 made of metal and an electrical heating element which is arranged inside the jacket tube 21 made of metal, which is why only the electrical supply lines 22, 23 leading into the interior of the jacket tube 21 made of metal are visible.
  • a connecting lug 24 which is integrally connected to the metal casing pipe 21.
  • connection lug 24 has a section 24a which protrudes beyond the edge 21a of the tubular casing 21 made of metal. Further
  • the connecting lug 24 has a section 24b in which it is formed by a section of the edge region 21b of the jacket tube 21 made of metal, which has recesses 25a, 25b penetrating through the tube wall of the jacket tube 21 made of metal from a section 21c of the jacket tube 21 which is adjacent in the circumferential direction made of metal and is separated from a section 21d of the jacket tube 21 made of metal which is adjacent to the circumferential direction.
  • the connection lug 24 is designed as a male part of a flat plug connection.
  • a protective conductor 26 is also shown, which has a female tab 27 at its end facing the heating cartridge 20.
  • the connection to the protective earth can thus be established simply and securely by pushing the flat plug 27 onto the connecting lug 24 designed as a male part of the flat plug connection.
  • the metal is made T-shaped over the edge of the tube wall of the jacket tube and then shaped.
  • Figure 4 shows another, but not part of the invention heating cartridge 30 for low voltage or protective voltage with a jacket tube 31 made of metal and an electrical heating element 32 which is arranged within the jacket tube 31 made of metal, which is why it is shown in dashed lines.
  • the electrical heating element 32 is connected at its one end 32a to an electrical supply line 33 leading into the interior of the jacket tube 31 made of metal, the section of which extending in the interior of the jacket tube 31 made of metal is also shown in dashed lines.
  • This connection can be made, for example, by welding, crimping or pressing.
  • the other end 32b of the electrical heating element 32 is electrically connected to the metal casing 31, e.g. also welded, crimped or pressed.
  • the jacket tube 31 made of metal thus serves as a return conductor in the heating cartridge 30.
  • connection lug 34 which is integrally formed on the metal casing pipe 31 and is formed by a material section which projects beyond the edge 31a of the metal casing pipe 31.
  • connection lug 34 could also be defined by cutting two grooves, each penetrating the wall of the metal casing tube and extending from the edge of the metal casing tube, so that the connection lug had no section projecting beyond the edge of the metal casing tube.
  • FIG 4 Also shown is a second supply conductor 36, which has a female tab 37 on its end facing the heating cartridge 30.
  • the heating cartridge 20 shown can thus also be made in the heating cartridge 30 easily and securely to the second supply conductor 36 by pushing the flat plug 37 onto the connecting lug 34 designed as a male part of the flat plug connection.
  • FIG. 5 shows a further embodiment of a heating cartridge 40 with a jacket tube 41 made of metal and an electrical heating element which is arranged within the jacket tube 41 made of metal, which is why only its electrical supply lines leading into the interior of the jacket tube 41 made of metal 42,43 are visible.
  • the heating cartridge 40 differs from the heating cartridges 10, 20, 30 with regard to the design of the jacket tube 41 made of metal, in particular its flat, oval cross section, which is to be illustrated by way of example that the exact cross-sectional shape of the jacket tube 41 made of metal is not important .
  • the heating cartridge 40 differs from the heating cartridges 10, 20, 30 in that it has a metal connecting lug 44, which is arranged centrally in a section of the wall surface of the tubular casing 41 and has an angle> 0 °, namely approximately in the example shown is at a right angle to the wall surface of the tubular casing 41 made of metal.
  • connection lug 44 thus protrudes from the wall surface of the metal casing tube 41.
  • the connection lug 44 is designed as a male part of a flat plug connection.
  • a protective conductor 46 is also shown, which has a female tab 47 on its end facing the heating cartridge 40.
  • connection to the protective earth can thus also be established simply and securely by pushing the flat plug 47 onto the connecting lug 44 designed as a male part of the flat plug connection.

Description

Heizpatronen sind elektrische Heizvorrichtungen, bei denen das elektrische Heizelement, das z.B. durch einen auf einen Träger gewickelten Widerstandsdraht oder durch einen gewendelten Widerstandsdraht realisiert werden kann, im Inneren eines Mantelrohres aus Metall angeordnet sind, das das elektrische Heizelement vor Umgebungseinflüssen schützt. Der Wärmetransport vom elektrischen Heizelement zum Metallmantel kann dabei beispielsweise durch ein zumindest zwischen dem elektrischen Heizelement und dem Mantelrohr aus Metall vorgesehenen, gut wärmeleitenden, zumindest im Fall der Verwendung von Widerstandsdrähten ferner elektrisch isolierenden Füllmaterial wie z.B. Magnesiumoxid oder Mikanitplatten, gewährleistet werden.Cartridges are electrical heaters in which the electrical heating element, e.g. can be realized by a resistance wire wound on a carrier or by a wound resistance wire, are arranged inside a metal jacket tube, which protects the electrical heating element from environmental influences. The heat transport from the electrical heating element to the metal jacket can be provided, for example, by a good heat-conducting filler material, at least provided between the electrical heating element and the metal jacket tube, which is also electrically insulating, at least in the case of using resistance wires, such as e.g. Magnesium oxide or micanite plates can be guaranteed.

Für eine Vielzahl von Anwendungen ist es wünschenswert, dass das Mantelrohr auf Masse gelegt wird, indem es über einen Schutzleiter mit einer Schutzerde verbunden wird. Die Verbindung erfolgt nach dem Stand der Technik insbesondere durch ein Verschweißen oder Verlöten des Schutzleiters mit dem Mantelrohr aus Metall. Insbesondere bei Metallen, die schlecht schweißbar oder lötbar sind, wie z.B. im Fall von Mantelrohren aus Titan2 oder Aluminium, wird teilweise auch auf ein Festklemmen des Schutzleiters auf dem Mantelrohr zurückgegriffen, was aber ebenfalls nur eine fehleranfällige und relativ zuverlässige elektrische Kontaktierung ermöglicht.For a large number of applications, it is desirable for the jacket tube to be grounded by connecting it to a protective earth via a protective conductor. According to the prior art, the connection is made in particular by welding or soldering the protective conductor to the metal jacket tube. Especially for metals that are difficult to weld or solder, such as in the case of sheathed tubes made of titanium 2 or aluminum, the protective conductor is sometimes clamped onto the sheathed tube, but this also only enables fault-prone and relatively reliable electrical contacting.

Dasselbe Problem stellt sich bei Heizpatronen für Kleinspannung oder Schutzspannung, bei denen zwar keine Schutzerde benötigt wird, bei denen aber das Mantelrohr auch Metall als Rückleiter fungiert und daher mit einem elektrischen Leiter verbunden werden muss.The same problem arises with heating cartridges for extra-low voltage or protective voltage, in which no protective earth is required, but in which the casing tube also functions as a return conductor and therefore has to be connected to an electrical conductor.

Aus der DE 72 47 690 U3 ist eine Heizpatrone mit einem Mantelrohr aus Metall und einem elektrischen Heizelement bekannt, dass innerhalb des Mantelrohrs aus Metall angeordnet ist, bei der eine einstückig mit dem Mantelrohr aus Metall verbundene Anschlussfahne vorhanden ist.From the DE 72 47 690 U3 a heating cartridge with a jacket tube made of metal and an electrical heating element is known that is arranged inside the jacket tube made of metal, in which there is a connecting lug connected to the jacket tube made of metal.

Aus der JP S55 33443 ist ebenfalls eine Heizpatrone mit einem Mantelrohr aus Metall und einem elektrischen Heizelement, das innerhalb des Mantelrohrs aus Metall angeordnet ist, bekannt, die an der ihren Anschlüssen entgegengesetzten Seite eine Metallzunge mit einer diese durchsetzenden Bohrung aufweist.From the JP S55 33443 is also known a heating cartridge with a jacket tube made of metal and an electrical heating element which is arranged inside the jacket tube made of metal, which has on the opposite side of its connections a metal tongue with a hole passing through it.

Aus der DE 20 2007 010865 U1 ist eine elektrische Heizpatrone bekannt, bei der Anschlussdrähte mittig radial durch die Wand des rohrförmigen Metallmantels der Heizpatrone hindurchgeführt und dann abgeknickt werden.From the DE 20 2007 010865 U1 an electrical heating cartridge is known, in which connecting wires are guided radially in the center through the wall of the tubular metal jacket of the heating cartridge and then kinked.

Daraus ergibt sich die Aufgabe der Erfindung, eine Heizpatrone bereitzustellen, deren Mantelrohr aus Metall einfach und zuverlässig mit einem Leiter, z.B. einem Schutzleiter verbindbar ist. Diese Aufgabe wird gelöst durch eine Heizpatrone mit den Merkmalen des Schutzanspruchs 1. Eine vorteilhafte Weiterbildung der Erfindung ist Gegenstand des abhängigen Anspruchs.This is the object of the invention to provide a heating cartridge, the metal jacket tube of which is simple and reliable with a conductor, e.g. a protective conductor can be connected. This object is achieved by a heating cartridge with the features of protection claim 1. An advantageous development of the invention is the subject of the dependent claim.

Die erfindungsgemäße Heizpatrone weist, wie auch bekannte Heizpatronen, ein Mantelrohr aus Metall und ein elektrisches Heizelement, das innerhalb des Mantelrohrs aus Metall angeordnet ist, auf. Das elektrische Heizelement kann dabei z.B. als auf einen Träger gewickelter Widerstandsdraht oder als ein gewendelter Widerstandsdraht realisiert sein, wobei bevorzugt ein Füllmaterial den wärmeleitenden Kontakt zwischen elektrischem Heizelement und Mantelrohr herstellt. Anzumerken ist, dass der Begriff "Mantelohr" nicht als eine Beschränkung auf ein Rohr mit einem kreisförmigen Querschnitt bedeutet, so dass das Mantelrohr auch einen anderen Querschnitt aufweisen kann, insbesondere einen ovalen, mehreckigen oder flachen Querschnitt.The heating cartridge according to the invention, like also known heating cartridges, has a jacket tube made of metal and an electrical heating element which is arranged inside the jacket tube made of metal. The electric heating element can e.g. can be realized as a resistance wire wound on a carrier or as a wound resistance wire, a filler material preferably producing the heat-conducting contact between the electrical heating element and the jacket tube. It should be noted that the term “jacket tube” does not mean that it is restricted to a tube with a circular cross section, so that the jacket tube can also have a different cross section, in particular an oval, polygonal or flat cross section.

Erfindungswesentlich ist, dass mindestens eine einstückig mit dem Mantelrohr aus Metall verbundene Anschlussfahne vorhanden ist. Durch diese Maßnahme wird ein erheblich verbessertes Kontaktverhalten erreicht.It is essential to the invention that there is at least one connecting lug connected in one piece to the metal jacket tube. This measure significantly improves contact behavior.

Die Anschlussfahne kann in einer bevorzugten Ausführungsform der Erfindung an einem Ende des Mantelrohrs angeordnet sein. Sie kann insbesondere zumindest einen Abschnitt aufweisen der über den Rand des Mantelrohrs aus Metall hinausragt, alternativ oder zusätzlich kann die Anschlussfahne zumindest einen Abschnitt aufweisen, in dem sie durch einen Abschnitt des Randbereichs des Mantelrohrs aus Metall gebildet wird, der durch die Rohrwand des Mantelrohrs durchsetzende Ausnehmungen von einem in Umfangsrichtung benachbarten Abschnitt des Mantelrohrs aus Metall und von einem gegen die Umfangsrichtung benachbarten Abschnitt des Mantelrohrs aus Metall getrennt wird. Dabei können der in Umfangsrichtung benachbarte Abschnitt und der entgegen der Umfangsrichtung benachbarte Abschnitt unmittelbar miteinander verbunden sein, also ineinander übergehen oder als ein einziger Abschnitt aufgefasst werden.In a preferred embodiment of the invention, the connection lug can be arranged at one end of the casing tube. In particular, it can have at least one section that projects beyond the edge of the metal jacket tube, alternatively or additionally, the connection lug can have at least one section in which it is formed by a section of the edge region of the metal jacket tube that through the tube wall of the casing pipe recesses is separated from a circumferentially adjacent section of the casing pipe made of metal and from a section adjacent to the circumferential direction of the casing pipe made of metal. The section adjacent in the circumferential direction and the section adjacent against the circumferential direction can be directly connected to one another, that is to say they can merge into one another or be understood as a single section.

In einer anderen bevorzugten Ausführungsform der Erfindung ist die Anschlussfahne nicht randständig, sondern mittig in einem Abschnitt der Wandfläche des Mantelrohrs aus Metall angeordnet. Dies kann realisiert werden, indem die Anschlussfahne aus der Wandfläche ausgestanzt oder -beispielsweise mit einem Laser- ausgeschnitten wird. Die Anschlussfahne kann anschließend gebogen werden, so dass sie in einem Winkel zur Wandfläche des Mantelrohres steht. Eine weitere Möglichkeit, eine mittig in einem Abschnitt der Wandfläche des Mantelrohrs aus Metall angeordnete und in einem Winkel zu dieser stehende Anschlussfahnen zu realisieren besteht darin, die Anschlussfahne an die Wandung des Mantelrohrs einstückig anzuformen.In another preferred embodiment of the invention, the connection lug is not arranged at the edge but in the middle in a section of the wall surface of the metal casing tube. This can be achieved by punching out the connection lug from the wall surface or cutting it out, for example with a laser. The connecting lug can then be bent so that it is at an angle to the wall surface of the tubular casing. A further possibility of realizing a connecting lugs arranged centrally in a section of the wall surface of the casing tube made of metal and at an angle thereto is to form the connection lug in one piece on the wall of the casing tube.

Mit der Anschlussfahne wird in allen vorstehend erläuterten Varianten also eine einstückig mit dem Mantelrohr verbundene Struktur bereitgestellt, mit der ein Leiter, beispielsweise der Schutzleiter zur Schutzerde, auf einfachere Weise verbunden werden kann als mit dem ansonsten unstrukturierten Mantelrohr. Diese Verbindung ist beispielsweise durch Verkrimpen, Vernieten oder Verschrauben erzielbar, besonders vorteilhaft ist es aber, wenn die Anschlussfahne zumindest in ihrem anschlussseitigen Endabschnitt als Flachstecker oder Rundstecker ausgebildet ist.In all of the variants explained above, the connecting lug thus provides a structure which is connected in one piece to the jacket tube and with which a conductor, for example the protective conductor to the protective earth, can be connected in a simpler manner than to the otherwise unstructured jacket tube. This connection can be achieved, for example, by crimping, riveting or screwing, but it is particularly advantageous if the connection lug is designed at least in its connection-side end section as a flat plug or round plug.

Zudem wird in allen Ausführungsformen, insbesondere aber bei der Ausgestaltung der Verbindung als Flach- oder Rundstecker durch die einstückig mit dem Mantelrohr ausgeführte Anschlussfahne eine herzustellende elektrische Verbindung und somit eine potentielle Fehlerquelle eingespart.In addition, in all embodiments, in particular when designing the connection as a flat or round plug, the electrical connection to be made and thus a potential source of error are saved by the connecting lug which is made in one piece with the tubular casing.

Die Erfindung wird nachfolgend anhand von beispielhaften Figuren näher erläutert. Es zeigt:

Fig. 1:
ein erstes Ausführungsbeispiel für eine Heizpatrone,
Fig. 2:
die Heizpatrone aus Fig. 1 mit angeschlossenem Schutzleiter,
Fig. 3:
ein zweites Ausführungsbeispiel für eine Heizpatrone,
Fig. 4:
ein drittes Ausführungsbeispiel für eine Heizpatrone, das nicht zur Erfindung gehört, und
Fig. 5:
ein viertes Ausführungsbeispiel für eine Heizpatrone.
The invention is explained in more detail below using exemplary figures. It shows:
Fig. 1:
a first embodiment of a heating cartridge,
Fig. 2:
the heating cartridge Fig. 1 with connected protective conductor,
Fig. 3:
a second embodiment of a heating cartridge,
Fig. 4:
a third embodiment of a heating cartridge, which is not part of the invention, and
Fig. 5:
a fourth embodiment of a heating cartridge.

Dabei werden für gleiche Teile gleicher Ausführungsformen dieselben Bezugszeichen verwendet.The same reference numerals are used for the same parts of the same embodiments.

Figur 1 zeigt eine Heizpatrone 10 mit einem Mantelrohr 11 aus Metall und einem elektrischen Heizelement, das innerhalb des Mantelrohrs 11 aus Metall angeordnet ist, weshalb nur dessen in den Innenraum des Mantelrohrs 11 aus Metall führenden elektrische Versorgungsleitungen 12,13 sichtbar sind. An dem den Versorgungsleitungen 12,13 zugewandten Ende des Mantelrohrs 11 aus Metall ist eine Anschlussfahne 14 angeordnet, die einstückig mit dem Mantelrohr 11 aus Metall verbunden ist. Figure 1 shows a heating cartridge 10 with a jacket tube 11 made of metal and an electrical heating element which is arranged inside the jacket tube 11 made of metal, which is why only the electrical supply lines 12, 13 leading into the interior of the jacket tube 11 made of metal are visible. At the end of the casing pipe 11 made of metal facing the supply lines 12, 13 there is a connecting lug 14 which is integrally connected to the casing pipe 11 made of metal.

Die Anschlussfahne 14 weist einen Abschnitt 14a auf, der über den Rand 11a des Mantelrohrs 11 aus Metall hinausragt. Ferner weist die Anschlussfahne 14 einen Abschnitt 14b auf, in dem sie durch einen Abschnitt des Randbereichs 11b des Mantelrohrs 11 aus Metall gebildet wird, der durch die Rohrwand des Mantelrohrs 11 aus Metall durchsetzende Ausnehmungen 15a,15b von einem in Umfangsrichtung benachbarten Abschnitt 11c des Mantelrohrs 11 aus Metall und von einem gegen die Umfangsrichtung benachbarten Abschnitt 11d des Mantelrohrs 11 aus Metall getrennt wird.The connection lug 14 has a section 14a which projects beyond the edge 11a of the metal casing tube 11. Furthermore, the connecting lug 14 has a section 14b, in which it is formed by a section of the edge region 11b of the jacket tube 11 made of metal, the recesses 15a, 15b penetrating through the tube wall of the jacket tube 11 made of metal from a section 11c of the jacket tube adjacent in the circumferential direction 11 made of metal and is separated from a section 11d of the jacket tube 11 made of metal, which section is adjacent to the circumferential direction.

Figur 2 zeigt die Heizpatrone aus Figur 1 mit einem an der Anschlussfahne 14 angeschlossenen Schutzleiter 16, der die Verbindung zur Schutzerde herstellt. Die Verbindung zwischen Anschlussfahne 14 und Schutzleiter 16 wird in diesem Beispiel durch eine verkrimpte Krimphülse 17 hergestellt. Diese Krimpverbindung ist insbesondere wegen der größeren Ähnlichkeit der Dimensionen von Anschlussfahne 14 und Schutzleiter 16 sehr viel zuverlässiger herstellbar als eine Krimpverbindung zum Mantelrohr 11 aus Metall selbst. Figure 2 shows the heating cartridge Figure 1 with a protective conductor 16 connected to the connecting lug 14, which establishes the connection to the protective earth. The connection between terminal lug 14 and protective conductor 16 is established in this example by a crimped crimp sleeve 17. This crimp connection can be produced much more reliably than a crimp connection to the casing tube 11 made of metal itself, in particular because of the greater similarity of the dimensions of the connecting lug 14 and protective conductor 16.

Figur 3 zeigt eine Heizpatrone 20 mit einem Mantelrohr 21 aus Metall und einem elektrischen Heizelement, das innerhalb des Mantelrohrs 21 aus Metall angeordnet ist, weshalb nur dessen in den Innenraum des Mantelrohrs 21 aus Metall führenden elektrische Versorgungsleitungen 22,23 sichtbar sind. An dem den Versorgungsleitungen 22,23 zugewandten Ende des Mantelrohrs 21 aus Metall ist eine Anschlussfahne 24 angeordnet, die einstückig mit dem Mantelrohr 21 aus Metall verbunden ist. Figure 3 shows a heating cartridge 20 with a jacket tube 21 made of metal and an electrical heating element which is arranged inside the jacket tube 21 made of metal, which is why only the electrical supply lines 22, 23 leading into the interior of the jacket tube 21 made of metal are visible. At the end of the metal casing pipe 21 facing the supply lines 22, 23 there is a connecting lug 24 which is integrally connected to the metal casing pipe 21.

Die Anschlussfahne 24 weist einen Abschnitt 24a auf, der über den Rand 21a des Mantelrohrs 21 aus Metall hinausragt. Ferner weist die Anschlussfahne 24 einen Abschnitt 24b auf, in dem sie durch einen Abschnitt des Randbereichs 21b des Mantelrohrs 21 aus Metall gebildet wird, der durch die Rohrwand des Mantelrohrs 21 aus Metall durchsetzende Ausnehmungen 25a,25b von einem in Umfangsrichtung benachbarten Abschnitt 21c des Mantelrohrs 21 aus Metall und von einem gegen die Umfangsrichtung benachbarten Abschnitt 21d des Mantelrohrs 21 aus Metall getrennt wird. Dabei ist die Anschlussfahne 24 als männlicher Teil einer Flachsteckverbindung ausgestaltet.The connection lug 24 has a section 24a which protrudes beyond the edge 21a of the tubular casing 21 made of metal. Further The connecting lug 24 has a section 24b in which it is formed by a section of the edge region 21b of the jacket tube 21 made of metal, which has recesses 25a, 25b penetrating through the tube wall of the jacket tube 21 made of metal from a section 21c of the jacket tube 21 which is adjacent in the circumferential direction made of metal and is separated from a section 21d of the jacket tube 21 made of metal which is adjacent to the circumferential direction. The connection lug 24 is designed as a male part of a flat plug connection.

In Figur 3 ist ferner ein Schutzleiter 26, der an seinem der Heizpatrone 20 zugewandten Ende einen weiblichen Flachstecker 27 aufweist, dargestellt. Wie mit dem Pfeil in Figur 3 angedeutet, kann somit die Verbindung zur Schutzerde einfach und sicher herstellt werden, indem der Flachstecker 27 auf die als männlicher Teil der Flachsteckverbindung ausgestaltete Anschlussfahne 24 aufgeschoben wird. Grundsätzlich ist natürlich ebenfalls möglich, die Rollen des männlichen und des weiblichen Teils der Flachsteckverbindung zu vertauschen, wenn man den über den Rand der Rohrwand des Mantelrohrs aus Metall T-förmig ausgestaltet und dann umformt.In Figure 3 a protective conductor 26 is also shown, which has a female tab 27 at its end facing the heating cartridge 20. As with the arrow in Figure 3 indicated, the connection to the protective earth can thus be established simply and securely by pushing the flat plug 27 onto the connecting lug 24 designed as a male part of the flat plug connection. In principle, it is of course also possible to interchange the roles of the male and the female part of the flat plug connection if the metal is made T-shaped over the edge of the tube wall of the jacket tube and then shaped.

Figur 4 zeigt eine weitere, aber nicht zur Erfindung gehörende Heizpatrone 30 für Kleinspannung oder Schutzspannung mit einem Mantelrohr 31 aus Metall und einem elektrischen Heizelement 32, das innerhalb des Mantelrohrs 31 aus Metall angeordnet ist, weshalb es gestrichelt dargestellt ist. Das elektrische Heizelement 32 ist an seinem einen Ende 32a mit einer in den Innenraum des Mantelrohrs 31 aus Metall führenden elektrische Versorgungsleitung 33 verbunden, deren im Innenraum des Mantelrohrs 31 aus Metall verlaufender Abschnitt ebenfalls gestrichelt dargestellt wird. Diese Verbindung kann beispielsweise durch Schweißen, Krimpen oder Verpressen hergestellt werden. Figure 4 shows another, but not part of the invention heating cartridge 30 for low voltage or protective voltage with a jacket tube 31 made of metal and an electrical heating element 32 which is arranged within the jacket tube 31 made of metal, which is why it is shown in dashed lines. The electrical heating element 32 is connected at its one end 32a to an electrical supply line 33 leading into the interior of the jacket tube 31 made of metal, the section of which extending in the interior of the jacket tube 31 made of metal is also shown in dashed lines. This connection can be made, for example, by welding, crimping or pressing.

Das andere Ende 32b des elektrischen Heizelements 32 ist mit dem Mantelrohr 31 aus Metall elektrisch verbunden, z.B. ebenfalls verschweisst, verkrimpt oder verpresst. Das Mantelrohr 31 aus Metall dient bei der Heizpatrone 30 also als Rückleiter.The other end 32b of the electrical heating element 32 is electrically connected to the metal casing 31, e.g. also welded, crimped or pressed. The jacket tube 31 made of metal thus serves as a return conductor in the heating cartridge 30.

An dem der Versorgungsleitung 33 zugewandten Ende des Mantelrohrs 31 aus Metall ist eine Anschlussfahne 34 angeordnet, die einstückig an dem Mantelrohr 31 aus Metall angeformt ist und von einem Materialabschnitt, der über den Rand 31a des Mantelrohrs 31 aus Metall hinausragt, gebildet wird. Alternativ könnte die Anschlussfahne 34 auch durch Einschneiden von zwei jeweils die Wand des Mantelrohrs aus Metall durchsetzenden, vom Rand des Mantelrohrs aus Metall ausgehenden Nuten definiert werden, so dass die Anschlussfahne keinen den Rand des Mantelrohrs aus Metall überragenden Abschnitt aufwiese.At the end of the metal casing pipe 31 facing the supply line 33 there is a connecting lug 34 which is integrally formed on the metal casing pipe 31 and is formed by a material section which projects beyond the edge 31a of the metal casing pipe 31. Alternatively, the connection lug 34 could also be defined by cutting two grooves, each penetrating the wall of the metal casing tube and extending from the edge of the metal casing tube, so that the connection lug had no section projecting beyond the edge of the metal casing tube.

In Figur 4 ist ferner ein zweiter Versorgungsleiter 36, der an seinem der Heizpatrone 30 zugewandten Ende einen weiblichen Flachstecker 37 aufweist, dargestellt. Wie bei der in Figur 3 gezeigten Heizpatrone 20 kann somit auch bei der Heizpatrone 30 die Verbindung zum zweiten Versorgungsleiter 36 einfach und sicher herstellt werden, indem der Flachstecker 37 auf die als männlicher Teil der Flachsteckverbindung ausgestaltete Anschlussfahne 34 aufgeschoben wird. Grundsätzlich ist natürlich auch hier möglich, die Rollen des männlichen und des weiblichen Teils der Flachsteckverbindung zu vertauschen.In Figure 4 Also shown is a second supply conductor 36, which has a female tab 37 on its end facing the heating cartridge 30. As with the in Figure 3 The heating cartridge 20 shown can thus also be made in the heating cartridge 30 easily and securely to the second supply conductor 36 by pushing the flat plug 37 onto the connecting lug 34 designed as a male part of the flat plug connection. In principle, it is of course also possible here to swap the roles of the male and female parts of the flat plug connection.

Figur 5 zeigt eine weitere Ausführungsform einer Heizpatrone 40 mit einem Mantelrohr 41 aus Metall und einem elektrischen Heizelement, das innerhalb des Mantelrohrs 41 aus Metall angeordnet ist, weshalb nur dessen in den Innenraum des Mantelrohrs 41 aus Metall führenden elektrische Versorgungsleitungen 42,43 sichtbar sind. Die Heizpatrone 40 unterscheidet sich von den Heizpatronen 10,20,30 im Hinblick auf die Ausgestaltung des Mantelrohrs 41 aus Metall, insbesondere seinen flachen, ovalen Querschnitt, wodurch exemplarisch veranschaulicht werden soll, dass es auf die exakte Querschnittsform des Mantelrohrs 41 aus Metall nicht ankommt. Figure 5 shows a further embodiment of a heating cartridge 40 with a jacket tube 41 made of metal and an electrical heating element which is arranged within the jacket tube 41 made of metal, which is why only its electrical supply lines leading into the interior of the jacket tube 41 made of metal 42,43 are visible. The heating cartridge 40 differs from the heating cartridges 10, 20, 30 with regard to the design of the jacket tube 41 made of metal, in particular its flat, oval cross section, which is to be illustrated by way of example that the exact cross-sectional shape of the jacket tube 41 made of metal is not important .

Ferner unterscheidet sich die Heizpatrone 40 noch von den Heizpatronen 10,20,30 dadurch, dass sie eine mittig in einem Abschnitt der Wandfläche des Mantelrohrs 41 aus Metall angeordnete Anschlussfahne 44 aufweist, die in einem Winkel >0°, nämlich im dargestellten Beispiel in etwa in einem rechten Winkel, zur Wandfläche des Mantelrohres 41 aus Metall steht.Furthermore, the heating cartridge 40 differs from the heating cartridges 10, 20, 30 in that it has a metal connecting lug 44, which is arranged centrally in a section of the wall surface of the tubular casing 41 and has an angle> 0 °, namely approximately in the example shown is at a right angle to the wall surface of the tubular casing 41 made of metal.

Die Anschlussfahne 44 ragt somit in diesem Beispiel aus der Wandfläche des Mantelrohrs 41 aus Metall hervor. Dabei ist die Anschlussfahne 44 als männlicher Teil einer Flachsteckverbindung ausgestaltet. In Figur 5 ist ferner ein Schutzleiter 46, der an seinem der Heizpatrone 40 zugewandten Ende einen weiblichen Flachstecker 47 aufweist, dargestellt. Wie in Figur 3 kann somit auch hier die Verbindung zur Schutzerde einfach und sicher herstellt werden, indem der Flachstecker 47 auf die als männlicher Teil der Flachsteckverbindung ausgestaltete Anschlussfahne 44 aufgeschoben wird.In this example, the connection lug 44 thus protrudes from the wall surface of the metal casing tube 41. The connection lug 44 is designed as a male part of a flat plug connection. In Figure 5 a protective conductor 46 is also shown, which has a female tab 47 on its end facing the heating cartridge 40. As in Figure 3 the connection to the protective earth can thus also be established simply and securely by pushing the flat plug 47 onto the connecting lug 44 designed as a male part of the flat plug connection.

BezugszeichenlisteReference list

10,20,30,4010, 20, 30, 40
HeizpatroneHeating cartridge
11,21,31,4111,21,31,41
MantelrohrCasing pipe
11a,21a,31a11a, 21a, 31a
Rand (des Mantelrohrs)Edge (of the casing tube)
11b,21b11b, 21b
Randbereich (des Mantelrohrs)Edge area (of the casing tube)
11c,11d,21c,21d11c, 11d, 21c, 21d
Abschnitt (des Mantelrohrs)Section (of the casing tube)
12,13,22,23,33,36,42,4312,13,22,23,33,36,42,43
Versorgungsleitungsupply line
14,24,34,4414,24,34,44
AnschlussfahneConnection lug
14a,14b,24a,24b14a, 14b, 24a, 24b
Abschnitt (der Anschlussfahne)Section (the connecting lug)
15a,15b,25a,25b15a, 15b, 25a, 25b
AusnehmungRecess
16,26,4616,26,46
SchutzleiterProtective conductor
1717th
KrimphülseCrimp sleeve
27,37,4727,37,47
FlachsteckerFlat connector
3232
elektrisches Heizelementelectric heating element
32a,32b32a, 32b
Ende (des elektrischen Heizelements)End (of the electric heating element)

Claims (2)

  1. Heating cartridge (10, 20, 40) with a casing pipe (11, 21, 41) made of metal and an electrical heating element which is arranged inside the metal casing pipe (11, 21, 41), wherein at least one connection tab (14, 24, 44) is present which is integrally connected to the metal casing pipe (11, 21, 41),
    characterised in that the connection tab (14, 24) is present at one end of the metal casing pipe (11, 21, 41) and has at least one portion (14b, 24b) in which it is formed by a portion of the edge region (11b, 21b) of the metal casing pipe (11, 21) which is separated, by recesses (15a, 15b, 25a, 25b) extending through the pipe wall of the casing pipe (11, 21), from a portion (11c, 21c) of the metal casing pipe (11, 21) which is adjacent in the circumferential direction and from a portion (11d, 21d) of the metal casing pipe (11, 21) which is adjacent against the circumferential direction,
    or that the connection tab (44) is arranged centrally in a portion of the wall face of the metal casing pipe (41).
  2. Heating cartridge (20, 40) according to claim 1, characterised in that the connection tab (24, 55) is configured, at least in its end portion on the connection side, as a flat plug or round plug.
EP16168183.8A 2015-05-12 2016-05-03 Heating cartridge Active EP3094158B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202015102449.5U DE202015102449U1 (en) 2015-05-12 2015-05-12 Cartridge Heater

Publications (2)

Publication Number Publication Date
EP3094158A1 EP3094158A1 (en) 2016-11-16
EP3094158B1 true EP3094158B1 (en) 2020-03-25

Family

ID=53443595

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16168183.8A Active EP3094158B1 (en) 2015-05-12 2016-05-03 Heating cartridge

Country Status (3)

Country Link
US (1) US10257886B2 (en)
EP (1) EP3094158B1 (en)
DE (1) DE202015102449U1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3307135A (en) * 1966-02-01 1967-02-28 Rama Corp Cartridge heater
DE7247690U (en) * 1972-12-29 1973-08-30 Siemens Ag ELECTRIC TUBE RADIATOR
JPS5533443U (en) * 1978-08-24 1980-03-04
DE8531701U1 (en) 1985-11-09 1986-02-06 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Retaining plate
DE202007010865U1 (en) 2007-08-03 2007-10-11 Türk & Hillinger GmbH Electric heating cartridge
TW201441001A (en) * 2013-04-29 2014-11-01 Foxnum Technology Co Ltd Nozzle of injection machine and heating apparatus of the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3094158A1 (en) 2016-11-16
US20160338148A1 (en) 2016-11-17
US10257886B2 (en) 2019-04-09
DE202015102449U1 (en) 2015-05-29

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