EP2589261A1 - Heater rod comprising a casing in which at least one electrical resistance heating element is mounted - Google Patents

Heater rod comprising a casing in which at least one electrical resistance heating element is mounted

Info

Publication number
EP2589261A1
EP2589261A1 EP11741477.1A EP11741477A EP2589261A1 EP 2589261 A1 EP2589261 A1 EP 2589261A1 EP 11741477 A EP11741477 A EP 11741477A EP 2589261 A1 EP2589261 A1 EP 2589261A1
Authority
EP
European Patent Office
Prior art keywords
heating
casing
heating rod
resistor
rod according
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.)
Withdrawn
Application number
EP11741477.1A
Other languages
German (de)
French (fr)
Inventor
Christian Schott
Jacques Toussaint
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.)
Vulcanic
Original Assignee
Vulcanic
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 Vulcanic filed Critical Vulcanic
Publication of EP2589261A1 publication Critical patent/EP2589261A1/en
Withdrawn legal-status Critical Current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
    • H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/02—Apparatus or processes specially adapted for manufacturing resistors adapted for manufacturing resistors with envelope or housing
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49083—Heater type

Definitions

  • Heating rod comprising an envelope in which at least one electric heating element is mounted
  • the invention relates to a heating rod comprising an envelope in which at least one electric heating resistor is mounted, and a method for producing such a heating rod.
  • Such rods are used to heat solids or fluids in the industrial field. They are particularly applicable in nuclear power plants, where they are used to heat boron water pressurizers in the primary circuit of the reactor. These rods must meet strict specifications in terms of service life, resistance to pressure and temperature. In addition, they must be able to dissipate a large thermal power in a limited volume, such as in the tank of a primary circuit pressurizer, and therefore have a high thermal emission rate, generally greater than 16 W / cm 2 .
  • These rods have a cylindrical metal shell vulgarly called shielding, heating son mounted in said casing and an internal insulator for thermal conduction and electrical insulation between said heating son and said envelope.
  • the electric heating rods can be equipped with an internal insulation type "electro-molten magnesia” (MgO).
  • MgO electro-molten magnesia
  • heating rods which are made by threading straight heating son in a barrel of an internal insulation based on a compressed material, so that said heating son are arranged in a squirrel cage in said rods.
  • the invention aims to improve the prior art by providing in particular heating rods having both a long life and low sensitivity to mechanical stresses.
  • the invention proposes a heating rod comprising an envelope in which at least one electrical resistance heater is mounted, an internal insulator being disposed in the casing for thermal conduction and electrical insulation between said resistor and said casing, the resistor being formed of at least one heating wire having a helical geometry and that the internal insulation is based on boron nitride.
  • the invention proposes a method of producing such a heating rod, said method providing for:
  • FIG. 1 schematically shows a heating rod according to one embodiment of the invention
  • FIG. 1 shows an enlargement of the zone II of Figure 1.
  • a heating rod comprising a casing 1 which may be metallic and have a cylindrical shape.
  • This envelope 1 ends with an end 2 which is fixed to the casing 1 by welding or brazing.
  • the casing 1 is fixed by welding or brazing on the head of a sealed electrical connector 3 which ensures the passage of an electric current between the inside and the outside of the heating rod.
  • a part 10 may be fixed by welding or soldering and sealingly on the connector 3 of the heating rod, to allow sealing of said rod on its receptacle.
  • the envelope 1, the end 2, the connector 3 and the welds or solders for fixing these elements together are designed and controlled in order to withstand without damage the constraints of the receptacle equipment on which the heating rod is installed, in particular in terms of pressure, temperature, corrosion or radiation.
  • At least one electric heating resistor 4 is mounted in the casing 1.
  • the resistor 4 is formed of at least one heating wire which has a helical geometry.
  • the helical geometry of the heating wire is defined by a winding diameter d and a pitch pitch p. This geometry is particularly advantageous for a heating rod intended to be subjected to alternating temperature cycles.
  • the heating wire may be made of nickel / chromium, in order to withstand high temperatures and not to change its power dissipated during temperature changes.
  • An internal insulator 5 is disposed in the casing 1 to ensure thermal conduction and electrical insulation between the resistor 4 and said casing.
  • the inner insulation 5 is based on boron nitride, a material having in particular a high coefficient of thermal conduction, in order to be able to subject the heating wire of the resistor 4 to lower temperatures and thus increase the service life and / or the thermal emission rate of said heating son.
  • the heating rod is made by disposing at least one electric heating resistor 4 formed of at least one heating wire having a helical geometry in the casing 1, and then disposing an inner insulation 5 based on boron nitride in said envelope.
  • the embodiment method may provide for disposing the internal insulation 5 in the envelope 1 by pouring said insulation into said envelope maintained vertically.
  • the inner insulation 5 may be in the form of pellets of boron nitride previously compressed.
  • the heating wire of the resistor 4 can be threaded helically around an insulating insert 6 before being arranged in the casing 1, so that the helicoid of said heating wire extends around said insert in the heating rod.
  • the insulating insert 6 may be made based on an insulating material which is different from that of the inner insulation 5.
  • the insulating insert 6 may be made based on ceramic or magnesia.
  • the geometry of the heating wire of the resistor 4 is judiciously chosen.
  • the heating wire when it is not held in its center by an insulating insert which serves as a support, it must have a large diameter and a helical geometry with a small winding diameter d and a large pitch of turn .
  • the shape of the heating wires and their arrangement in the casing 1 are chosen so that said wires can withstand the stresses due to the thermal expansions and the mechanical stresses to which the cane is subjected during the production process, and then during its operation in situ.
  • the number of heating resistors 4 and their arrangement in the casing 1 of said heating rod are judiciously chosen.
  • two resistors 4 are mounted in the casing 1 while being electrically connected in series.
  • a non-heating jumper 7a made of conductive material is connected to each of the ends of the resistors 4 intended to be arranged facing the end 2 during the provision of said resistors in the casing 1, in order to electrically couple the wires. heating said resistors.
  • resistors 4 in particular several pairs of resistors 4, can be mounted in the casing by being electrically connected in parallel with each end of a non-heating jumper 7a.
  • each heating wire is electrically connected to the connector 3 by means of a non-heating wire 7b made of conductive material and protruding from the casing 1, these non-heating wires 7b allowing the transport of an electric current. between the connector 3 and the heating wires.
  • the non-heating son 7b extend at least partially inside the connector 3, so as to form with said connector a non-heating portion of the heating rod.
  • the non-heating wires 7b may be connected to a connection conductor 8 or an electrical connection terminal 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Resistance Heating (AREA)

Abstract

The invention relates to a heater rod comprising a casing (1) in which at least one electrical resistance heating element (4) is mounted, an internal insulator (5) being placed in the casing (1) to ensure thermal conduction and electrical insulation between said resistance element and said casing, the resistance element (4) being formed from at least one heating wire having a helical geometry and the internal insulator (5) being based on boron nitride.

Description

Canne chauffante comprenant une enveloppe dans laquelle au moins une résistance électrique chauffante est montée  Heating rod comprising an envelope in which at least one electric heating element is mounted
L'invention concerne une canne chauffante comprenant une enveloppe dans laquelle au moins une résistance électrique chauffante est montée, ainsi qu'un procédé de réalisation d'une telle canne chauffante. The invention relates to a heating rod comprising an envelope in which at least one electric heating resistor is mounted, and a method for producing such a heating rod.
De telles cannes sont employées pour chauffer des solides ou des fluides dans le domaine industriel. Elles trouvent notamment leur application dans les centrales nucléaires productrices d'électricité, où elles sont employées pour chauffer des pressuriseurs d'eau borée dans le circuit primaire du réacteur. Ces cannes doivent répondre à des cahiers de charge sévères en termes de durée de vie, de tenue à la pression et à la température. En outre, elles doivent pouvoir dissiper une grande puissance thermique dans un volume limité, comme par exemple dans la cuve d'un pressuriseur de circuit primaire, et donc présenter un taux d'émission thermique important, généralement supérieur à 16 W/cm2. Such rods are used to heat solids or fluids in the industrial field. They are particularly applicable in nuclear power plants, where they are used to heat boron water pressurizers in the primary circuit of the reactor. These rods must meet strict specifications in terms of service life, resistance to pressure and temperature. In addition, they must be able to dissipate a large thermal power in a limited volume, such as in the tank of a primary circuit pressurizer, and therefore have a high thermal emission rate, generally greater than 16 W / cm 2 .
Ces cannes présentent une enveloppe métallique cylindrique vulgairement appelée blindage, des fils chauffants montés dans ladite enveloppe et un isolant interne pour assurer la conduction thermique et l'isolation électrique entre lesdits fils chauffants et ladite enveloppe. These rods have a cylindrical metal shell vulgarly called shielding, heating son mounted in said casing and an internal insulator for thermal conduction and electrical insulation between said heating son and said envelope.
Selon une réalisation industrielle, les cannes chauffantes électriques peuvent être équipées d'un isolant interne de type « magnésie électro fondue » (MgO). En outre, il existe des cannes chauffantes qui sont réalisées en enfilant des fils chauffants rectilignes dans un barillet d'un isolant interne à base d'un matériau comprimé, de sorte que lesdits fils chauffants sont disposés en cage d'écureuil dans lesdites cannes. L'invention vise à perfectionner l'art antérieur en proposant notamment des cannes chauffantes présentant à la fois une grande durée de vie et une faible sensibilité aux contraintes mécaniques. According to an industrial embodiment, the electric heating rods can be equipped with an internal insulation type "electro-molten magnesia" (MgO). In addition, there are heating rods which are made by threading straight heating son in a barrel of an internal insulation based on a compressed material, so that said heating son are arranged in a squirrel cage in said rods. The invention aims to improve the prior art by providing in particular heating rods having both a long life and low sensitivity to mechanical stresses.
A cet effet, selon un premier aspect, l'invention propose une canne chauffante comprenant une enveloppe dans laquelle au moins une résistance électrique chauffante est montée, un isolant interne étant disposé dans l'enveloppe pour assurer la conduction thermique et l'isolation électrique entre ladite résistance et ladite enveloppe, la résistance étant formée d'au moins un fil chauffant qui présente une géométrie hélicoïdale et en ce que l'isolant interne est à base de nitrure de bore. For this purpose, according to a first aspect, the invention proposes a heating rod comprising an envelope in which at least one electrical resistance heater is mounted, an internal insulator being disposed in the casing for thermal conduction and electrical insulation between said resistor and said casing, the resistor being formed of at least one heating wire having a helical geometry and that the internal insulation is based on boron nitride.
Selon un deuxième aspect, l'invention propose un procédé de réalisation d'une telle canne chauffante, ledit procédé prévoyant de : According to a second aspect, the invention proposes a method of producing such a heating rod, said method providing for:
- disposer au moins une résistance électrique chauffante formée d'au moins un fil chauffant présentant une géométrie hélicoïdale dans une enveloppe ;  - Have at least one heating electric resistance formed of at least one heating wire having a helical geometry in an envelope;
- disposer un isolant interne à base de nitrure de bore dans ladite enveloppe ;  - Have an internal insulation based on boron nitride in said envelope;
- compacter l'ensemble.  - compact the whole.
D'autres particularités et avantages de l'invention apparaîtront dans la description qui suit, faite en référence aux figures annexées dans lesquelles : Other features and advantages of the invention will appear in the description which follows, made with reference to the appended figures in which:
- la figure 1 représente de façon schématique une canne chauffante selon un mode de réalisation de l'invention ;  - Figure 1 schematically shows a heating rod according to one embodiment of the invention;
- la figure 2 représente un agrandissement de la zone II de la figure 1 .  - Figure 2 shows an enlargement of the zone II of Figure 1.
En relation avec ces figures, on décrit ci-dessous une canne chauffante comprenant une enveloppe 1 qui peut être métallique et présenter une forme cylindrique. In connection with these figures, described below is a heating rod comprising a casing 1 which may be metallic and have a cylindrical shape.
Cette enveloppe 1 se termine par une extrémité 2 qui est fixée à l'enveloppe 1 par soudage ou brasage. En outre, l'enveloppe 1 est fixée par soudage ou brasage sur la tête d'un connecteur 3 électrique étanche qui assure le passage d'un courant électrique entre l'intérieur et l'extérieur de la canne chauffante. This envelope 1 ends with an end 2 which is fixed to the casing 1 by welding or brazing. In addition, the casing 1 is fixed by welding or brazing on the head of a sealed electrical connector 3 which ensures the passage of an electric current between the inside and the outside of the heating rod.
En relation avec la figure 1 , une pièce 10 peut être fixée par soudage ou brasage et de manière étanche sur le connecteur 3 de la canne chauffante, afin de permettre la fixation étanche de ladite canne sur son réceptacle. L'enveloppe 1 , l'extrémité 2, le connecteur 3 et les soudures ou brasures de fixation des ces éléments entre eux sont conçus et contrôlés afin de résister sans dommage aux contraintes de l'équipement réceptacle sur lequel la canne chauffante est installée, notamment en termes de pression, de température, de corrosion ou encore de rayonnement. In connection with Figure 1, a part 10 may be fixed by welding or soldering and sealingly on the connector 3 of the heating rod, to allow sealing of said rod on its receptacle. The envelope 1, the end 2, the connector 3 and the welds or solders for fixing these elements together are designed and controlled in order to withstand without damage the constraints of the receptacle equipment on which the heating rod is installed, in particular in terms of pressure, temperature, corrosion or radiation.
Au moins une résistance électrique chauffante 4 est montée dans l'enveloppe 1 . La résistance 4 est formée d'au moins un fil chauffant qui présente une géométrie hélicoïdale. En relation avec la figure 2, la géométrie hélicoïdale du fil chauffant est définie par un diamètre d d'enroulement et par un pas de spire p. Cette géométrie est particulièrement avantageuse pour une canne chauffante destinée à être soumise à des cycles de température alternés. En outre, le fil chauffant peut être réalisé en nickel/chrome, afin de résister aux températures élevées et de ne pas modifier sa puissance dissipée lors des variations de température. At least one electric heating resistor 4 is mounted in the casing 1. The resistor 4 is formed of at least one heating wire which has a helical geometry. In relation to FIG. 2, the helical geometry of the heating wire is defined by a winding diameter d and a pitch pitch p. This geometry is particularly advantageous for a heating rod intended to be subjected to alternating temperature cycles. In addition, the heating wire may be made of nickel / chromium, in order to withstand high temperatures and not to change its power dissipated during temperature changes.
Un isolant interne 5 est disposé dans l'enveloppe 1 pour assurer la conduction thermique et l'isolation électrique entre la résistance 4 et ladite enveloppe. L'isolant interne 5 est à base de nitrure de bore, matériau présentant en particulier un coefficient important de conduction thermique, afin de pouvoir soumettre le fil chauffant de la résistance 4 à des températures moins élevées et ainsi augmenter la durée de vie et/ou le taux d'émission thermique dudit fils chauffant. An internal insulator 5 is disposed in the casing 1 to ensure thermal conduction and electrical insulation between the resistor 4 and said casing. The inner insulation 5 is based on boron nitride, a material having in particular a high coefficient of thermal conduction, in order to be able to subject the heating wire of the resistor 4 to lower temperatures and thus increase the service life and / or the thermal emission rate of said heating son.
Selon une réalisation, la canne chauffante est réalisée en disposant au moins une résistance électrique chauffante 4 formée d'au moins un fil chauffant présentant une géométrie hélicoïdale dans l'enveloppe 1 , puis en disposant un isolant interne 5 à base de nitrure de bore dans ladite enveloppe. According to one embodiment, the heating rod is made by disposing at least one electric heating resistor 4 formed of at least one heating wire having a helical geometry in the casing 1, and then disposing an inner insulation 5 based on boron nitride in said envelope.
En particulier, le procédé de réalisation peut prévoir de disposer l'isolant interne 5 dans l'enveloppe 1 en versant ledit isolant dans ladite enveloppe maintenue verticalement. Toutefois, compte tenu du caractère collant du nitrure de bore, l'isolant interne 5 peut se présenter sous la forme de pastilles de nitrure de bore préalablement comprimées. Une fois qu'au moins une résistance 4 et un isolant interne 5 tels que décrits ci- dessus ont été disposés dans l'enveloppe 1 , le procédé de réalisation prévoit de compacter l'ensemble formé par ladite enveloppe, ladite résistance et ledit isolant interne afin d'obtenir une canne chauffante. Ce compactage peut être réalisé par rétreint, laminage ou étirage de l'enveloppe 1 . In particular, the embodiment method may provide for disposing the internal insulation 5 in the envelope 1 by pouring said insulation into said envelope maintained vertically. However, given the stickiness of boron nitride, the inner insulation 5 may be in the form of pellets of boron nitride previously compressed. Once at least one resistor 4 and an internal insulator 5 as described above have been arranged in the casing 1, the production method provides for compacting the assembly formed by said casing, said resistor and said internal insulator. to obtain a heating rod. This compacting can be achieved by shrinking, rolling or stretching the envelope 1.
En outre, pour simplifier le procédé de réalisation de la canne chauffante et pour diminuer davantage la sensibilité de ladite canne aux contraintes mécaniques, le fil chauffant de la résistance 4 peut être emmanché en hélicoïde autour d'un insert isolant 6 avant d'être disposé dans l'enveloppe 1 , de sorte que l'hélicoïde dudit fil chauffant s'étende autour dudit insert dans la canne chauffante. In addition, to simplify the method of producing the heating rod and to further reduce the sensitivity of said rod to mechanical stresses, the heating wire of the resistor 4 can be threaded helically around an insulating insert 6 before being arranged in the casing 1, so that the helicoid of said heating wire extends around said insert in the heating rod.
Selon une réalisation, l'insert isolant 6 peut être réalisé à base d'un matériau isolant qui est différent de celui de l'isolant interne 5. Par exemple, l'insert isolant 6 peut être réalisé à base de céramique ou de magnésie. According to one embodiment, the insulating insert 6 may be made based on an insulating material which is different from that of the inner insulation 5. For example, the insulating insert 6 may be made based on ceramic or magnesia.
En outre, pour simplifier le procédé de réalisation de la canne chauffante, la géométrie du fil chauffant de la résistance 4 est judicieusement choisie. En particulier, lorsque le fil chauffant n'est pas maintenu en son centre par un insert isolant qui lui sert de support, il doit présenter un gros diamètre et une géométrie hélicoïdale avec un petit diamètre d d'enroulement et un grand pas de spire p. In addition, to simplify the method of producing the heating rod, the geometry of the heating wire of the resistor 4 is judiciously chosen. In particular, when the heating wire is not held in its center by an insulating insert which serves as a support, it must have a large diameter and a helical geometry with a small winding diameter d and a large pitch of turn .
Ainsi, la forme des fils chauffants et leur disposition dans l'enveloppe 1 sont choisies afin que lesdits fils puissent supporter les contraintes dues aux dilatations thermiques et aux contraintes mécaniques auxquelles la canne est soumise pendant le procédé de réalisation, puis pendant son fonctionnement in situ. Pour améliorer le taux d'émission thermique de la canne chauffante, le nombre de résistances chauffantes 4 et leur disposition dans l'enveloppe 1 de ladite canne chauffante sont judicieusement choisis. Thus, the shape of the heating wires and their arrangement in the casing 1 are chosen so that said wires can withstand the stresses due to the thermal expansions and the mechanical stresses to which the cane is subjected during the production process, and then during its operation in situ. . To improve the heat emission rate of the heating rod, the number of heating resistors 4 and their arrangement in the casing 1 of said heating rod are judiciously chosen.
En relation avec la figure 1 , deux résistances 4 sont montées dans l'enveloppe 1 en étant connectées électriquement en série. Pour ce faire, un cavalier non chauffant 7a en matériau conducteur est raccordé à chacune des extrémités des résistances 4 destinées à être disposées en regard de l'extrémité 2 lors de la disposition desdites résistances dans l'enveloppe 1 , afin de coupler électriquement les fils chauffants desdites résistances. In relation to FIG. 1, two resistors 4 are mounted in the casing 1 while being electrically connected in series. To do this, a non-heating jumper 7a made of conductive material is connected to each of the ends of the resistors 4 intended to be arranged facing the end 2 during the provision of said resistors in the casing 1, in order to electrically couple the wires. heating said resistors.
Selon une réalisation non représentée, plusieurs résistances 4, notamment plusieurs couples de résistances 4, peuvent être montées dans l'enveloppe en étant connectées électriquement en parallèle à chacune des extrémités d'un cavalier non chauffant 7a. According to an embodiment not shown, several resistors 4, in particular several pairs of resistors 4, can be mounted in the casing by being electrically connected in parallel with each end of a non-heating jumper 7a.
En outre, sur la figure 1 , chaque fil chauffant est raccordé électriquement au connecteur 3 au moyen d'un fil non chauffant 7b en matériau conducteur et saillant de l'enveloppe 1 , ces fils non chauffants 7b permettant le transport d'un courant électrique entre le connecteur 3 et les fils chauffants. In addition, in FIG. 1, each heating wire is electrically connected to the connector 3 by means of a non-heating wire 7b made of conductive material and protruding from the casing 1, these non-heating wires 7b allowing the transport of an electric current. between the connector 3 and the heating wires.
En particulier, les fils non chauffants 7b s'étendent au moins partiellement à l'intérieur du connecteur 3, de sorte à former avec ledit connecteur une partie non chauffante de la canne chauffante. En outre, les fils non chauffants 7b peuvent être raccordés à un conducteur de connexion 8 ou à une borne 9 de raccordement électrique. In particular, the non-heating son 7b extend at least partially inside the connector 3, so as to form with said connector a non-heating portion of the heating rod. In addition, the non-heating wires 7b may be connected to a connection conductor 8 or an electrical connection terminal 9.

Claims

REVENDICATIONS
1 . Canne chauffante comprenant une enveloppe (1 ) dans laquelle au moins une résistance électrique chauffante (4) est montée, un isolant interne (5) étant disposé dans l'enveloppe (1 ) pour assurer la conduction thermique et l'isolation électrique entre ladite résistance et ladite enveloppe, ladite canne chauffante étant caractérisée en ce que la résistance (4) est formée d'au moins un fil chauffant qui présente une géométrie hélicoïdale et en ce que l'isolant interne (5) est à base de nitrure de bore. 1. Heating rod comprising a casing (1) in which at least one electric heating resistor (4) is mounted, an inner insulator (5) being arranged in the casing (1) to provide thermal conduction and electrical insulation between said resistor and said envelope, said heating rod being characterized in that the resistor (4) is formed of at least one heating wire which has a helical geometry and in that the inner insulator (5) is based on boron nitride.
2. Canne chauffante selon la revendication 1 , caractérisée en ce que l'isolant interne (5) se présente sous la forme de pastilles de nitrure de bore préalablement comprimées. 2. heating rod according to claim 1, characterized in that the inner insulation (5) is in the form of pellets of boron nitride previously compressed.
3. Canne chauffante selon la revendication 1 ou 2, caractérisée en ce qu'elle comprend en outre un insert isolant (6) autour duquel l'hélicoïde du fil chauffant s'étend. 3. heating rod according to claim 1 or 2, characterized in that it further comprises an insulating insert (6) around which the helicoid of the heating wire extends.
4. Canne chauffante selon la revendication 3, caractérisée en ce que l'insert isolant (6) est réalisé à base d'un matériau qui est différent de celui de l'isolant interne (5). 4. heating rod according to claim 3, characterized in that the insulating insert (6) is made of a material which is different from that of the inner insulation (5).
5. Canne chauffante selon la revendication 3 ou 4, caractérisée en ce que l'insert isolant (6) est à réalisé à base de céramique ou de magnésie. 5. Heating rod according to claim 3 or 4, characterized in that the insulating insert (6) is made of ceramic or magnesia.
6. Canne chauffante selon l'une quelconque des revendications 1 à 5, caractérisée en ce que deux résistances (4) sont montées dans l'enveloppe (1 ) en étant connectées électriquement en série. 6. heating rod according to any one of claims 1 to 5, characterized in that two resistors (4) are mounted in the casing (1) by being electrically connected in series.
7. Canne chauffante selon l'une quelconque des revendications 1 à 6, caractérisée en ce que le fil chauffant d'une résistance (4) est raccordé électriquement à un connecteur (3) saillant de l'enveloppe (1 ) au moyen d'un fil non chauffant (7b). 7. Heating rod according to any one of claims 1 to 6, characterized in that the heating wire of a resistor (4) is electrically connected to a connector (3) protruding from the casing (1) by means of a non-heating wire (7b).
8. Procédé de réalisation d'une canne chauffante selon l'une quelconque des revendications 1 à 7, ledit procédé prévoyant de : 8. A method of producing a heating rod according to any one of claims 1 to 7, said method providing for:
- disposer au moins une résistance électrique chauffante (4) formée d'au 5 moins un fil chauffant présentant une géométrie hélicoïdale dans une enveloppe (1 ) ;  disposing at least one heating electrical resistance (4) formed of at least one heating wire having a helical geometry in an envelope (1);
- disposer un isolant interne (5) à base de nitrure de bore dans ladite enveloppe ;  arranging an internal insulator (5) based on boron nitride in said envelope;
- compacter l'ensemble.  - compact the whole.
o o
9. Procédé selon la revendication 8, caractérisé en ce que le fil chauffant de la résistance (4) est emmanché en hélicoïde autour d'un insert isolant (6) avant d'être disposé dans l'enveloppe (1 ).  9. The method of claim 8, characterized in that the heating wire of the resistor (4) is pressed helically around an insulating insert (6) before being disposed in the casing (1).
EP11741477.1A 2010-07-01 2011-06-28 Heater rod comprising a casing in which at least one electrical resistance heating element is mounted Withdrawn EP2589261A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1002793A FR2962296B1 (en) 2010-07-01 2010-07-01 HEATING ROD COMPRISING AN ENVELOPE IN WHICH AT LEAST ONE HEATING ELECTRICAL RESISTANCE IS MOUNTED.
PCT/FR2011/051501 WO2012001294A1 (en) 2010-07-01 2011-06-28 Heater rod comprising a casing in which at least one electrical resistance heating element is mounted

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EP2589261A1 true EP2589261A1 (en) 2013-05-08

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EP (1) EP2589261A1 (en)
KR (1) KR20130094780A (en)
CN (1) CN103155696A (en)
FR (1) FR2962296B1 (en)
RU (1) RU2013103500A (en)
WO (1) WO2012001294A1 (en)

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KR102260311B1 (en) * 2019-12-06 2021-06-03 에이치플러스에코 주식회사 Heat treatment system for contaminated soil using heating rod
CN111378817B (en) * 2020-04-16 2021-12-21 哈尔滨汽轮机厂有限责任公司 Inner wall heating device and heat treatment method using same

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FR2962296B1 (en) 2015-12-18
KR20130094780A (en) 2013-08-26
RU2013103500A (en) 2014-08-10
US20130098896A1 (en) 2013-04-25
CN103155696A (en) 2013-06-12
FR2962296A1 (en) 2012-01-06
WO2012001294A1 (en) 2012-01-05

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