EP0301973A1 - Device for supporting heating resistances along a brittle refractory and/or insulating wall - Google Patents

Device for supporting heating resistances along a brittle refractory and/or insulating wall Download PDF

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Publication number
EP0301973A1
EP0301973A1 EP88401978A EP88401978A EP0301973A1 EP 0301973 A1 EP0301973 A1 EP 0301973A1 EP 88401978 A EP88401978 A EP 88401978A EP 88401978 A EP88401978 A EP 88401978A EP 0301973 A1 EP0301973 A1 EP 0301973A1
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EP
European Patent Office
Prior art keywords
sheath
wall
bracket
slot
housed
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EP88401978A
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German (de)
French (fr)
Inventor
Daniel Verger
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FESTA
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FESTA
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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
    • H05B3/62—Heating elements specially adapted for furnaces
    • H05B3/66—Supports or mountings for heaters on or in the wall or roof

Definitions

  • Refractory and / or insulating materials in most industrial ovens are increasingly produced as a composite material based on agglomerated fibers.
  • the resulting lining is in the form of sheets or light panels, of the order of a few centimeters thick, which line the interior walls of the furnace infrastructure.
  • Such materials are ill-suited for fixing the electrical resistors constituting the heating elements of the oven.
  • This fixing is currently obtained either by making in the thickness of these materials, chutes open on the oven in which the resistors are arranged, or by anchoring means in dense refractory fixed to the infrastructure of the oven or to a frame. arranged in the tablecloth or the panels.
  • the disadvantages of these arrangements are of several orders: one of them lies in the fact that the resistors are more or less enclosed in the trunking, which is particularly true for the resistors arranged in a vault, which significantly reduces the power radiating from these heating elements.
  • the present invention intends to remedy these drawbacks by proposing a resistance support device by means of which the mechanical qualities of the refractory and / or insulating material are reinforced allowing the establishment of a lug or support bracket for the resistance itself , which is then supported outside the material without contact with it, thus being able to freely expand or retract and benefiting from a maximum radiation coefficient.
  • the lining material in question is insulating and / or refractory according to its density and its composition, this in a known manner.
  • the subject of the invention is therefore a device for enabling the support of heating resistors by a wall of fragile packing of poor mechanical quality constituted by an insert in the form of a split sheath housed in a recess in the wall, parallel to its outer face, and opening laterally on said face also by a slot, the profile of the sheath and the profile of the housing being complementary so as to prevent rotation of one relative to the other, and by a bracket, one end of which is housed in said sheath to come into abutment therefrom under the effect of a load applied to its other end located in overhang relative to said outer face of the coating.
  • the end of the bracket housed in the sheath is deformed so that the thickness of the volume which it sweeps while being moved perpendicular to the wall is greater than the width of the slot in the sheath.
  • bracket with a perpendicular return to form support of the latter on the wall located under said slot.
  • a refractory wall 1, or an insulating lining inside an industrial oven comprising a recess 2, here horizontal and parallel to the face 1a of the wall 1, this recess 2 opening onto this wall 1a by a slot 3.
  • the recess in FIG. 1 is substantially cylindrical except for two portions 2a and 2b which extend radially outwards from the main part cylindrical, opposite the slot 3.
  • a sheath 4 of generally tubular shape has been slid, the external profile of which corresponds to the profile of the recess 2, and to do this comprises two radial wings 4a and 4b housed in the extensions 2a and 2b of l 'Recess, said sheath 4 being open opposite the wings 4a and 4b by a slot 5 which is thus located opposite the slot 3.
  • This sheath will preferably be constituted by an insulating refractory material of the ceramic or similar kind.
  • the arrangement of the wings 4a and 4b of the sheath 4 in the housings 2a and 2b of the recess 2 prohibits the rotation of the sheath in the housing 2.
  • any other form of section achieving this result may be suitable.
  • the incorporation of the sheath 4 in the recess 2 will be obtained, preferably by performing an overmolding of the panel around the various sheaths which it comprises, by known manufacturing techniques.
  • the device according to the invention also comprises a bracket 6 constituted by a lug 6a and a perpendicular return 6b connected to the lug 6a by a gusset 6c.
  • the tab 6a extends beyond the return 6b by an end 7 which is housed through slots 3 and 5 inside the sheath 4.
  • This end 7 is deformed so that the thickness E of the volume qu '' it would sweep, if it was moved perpendicular to the face 1a of the wall 1, that is to say less than the width ( e ) of the slots 3 and 5.
  • This arrangement constitutes a locking of the stem in the sheath 4.
  • a load for example a resistor, or its support, applied to the other end 8 of the tab 6a, in the absence of the return 6b, will tend to rotate this tab around its fulcrum on the lower edge of the slot 5 of the sheath 4, this movement being thwarted by the support of the tab 7 against the inner wall of the sheath 4 which is itself immobilized in rotation against the effect of this torque by the wings 4a and 4b. It can therefore be seen that the quasi-point load that the leg 6a supports is finally transmitted to the refractory wall 1 through the surfaces of the wings 4a and 4b which constitute a distribution such that the characteristics of the wall 1 are compatible with the load by unit of area it collects.
  • the return 6b by resting on the outer face 1a of the refractory wall, partially relieves the sheath 4 from the forces it undergoes.
  • An optional advantageous arrangement consists of a lug projecting from the sole to penetrate the panel and constitute a locking against stresses tending to rotate the stem around its anchoring. It will also be noted that the end 8 of the tab 6a is shaped so as to receive the heating element or its support. Finally, the stem 6 may have a tab 6 a which forms an acute or obtuse angle with the sole 6 b .
  • Figure 2 schematically shows a sheath 4 'whose section is substantially triangular, which constitutes an alternative embodiment of the sheath 4.
  • the deformation of the end 7' of the bracket 6 ' will be adapted to the shape of the section of the sheath 4 ′.
  • the provisions of the invention can also apply to the support of resistors placed in the vault of an oven.
  • a sheath such as 4 ′
  • the stem 6 ′ having an end 7 ′ such that, for example, it can be introduced into the slots 3 ′ 5 ′ in a certain orientation and, after introduction, in modifying this orientation, lock said end 7 ′ inside the sheath 4 ′.
  • the invention finds an interesting application in the field of construction of industrial ovens.

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  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Furnace Details (AREA)

Abstract

The device is composed of a sheath (4) split at (5) and housed in a recess (2) in a friable refractory wall (1), the contours of the housing and sheath being such that it is not possible for the sheath to rotate in its housing, and of a bracket (6) one end (7) of which is housed inside the sheath in order to be retained therein like a rigid fixing. <IMAGE>

Description

Les materiaux réfractaires, et/ou isolants, dans la plupart des fours industriels, sont de plus en plus réalisés comme un matériau composite à base de fibres agglo­mérées. La garniture qui en résulte se présente sous la forme de nappes ou panneaux légers, d'épaisseur de l'ordre de quel­ques centimètres, qui viennent tapisser les parois inté­rieures de l'infrastructure du four.Refractory and / or insulating materials in most industrial ovens are increasingly produced as a composite material based on agglomerated fibers. The resulting lining is in the form of sheets or light panels, of the order of a few centimeters thick, which line the interior walls of the furnace infrastructure.

De tels matériaux sont mal adaptés à la fixation des résistances électriques constituant les élé­ments chauffants du four. Cette fixation est actuellement obtenue soit en réalisant dans l'épaisseur de ces matériaux, des goulottes ouvertes sur le four dans lesquelles sont disposées les résistances, soit par des moyens d'ancrage en réfractaire dense fixés à l'infrastructure du four ou à une armature disposée dans la nappe ou les panneaux. Les inconvénients de ces dispositions sont de plusieurs ordres : l'un d'eux réside dans le fait que les résistances sont plus ou moins enfermées dans les goulottes, ce qui est particulièrement vrai pour les résistances disposées en voûte, ce qui diminue sensiblement le pouvoir rayonnant de ces éléments chauffants. Un autre inconvénient tient à la dilatation de ces résistances, et à leur rétraction, lors des arrêts, démarrages, et modifications de la puissance de chauffe; les variations de longueurs qui en résultent sont la cause d'un mouvement relatif des résistances par rap­port aux parois de la goulotte qui d'une part engendre une usure du fil résistif car le matériau formant la gar­niture est très abrasif, cette usure étant la cause d'une diminution de section et donc de surchauffe locale des résistances pouvant conduire à leur rupture, et d'autre part conduit à une détérioration assez rapide de la garniture elle-même. Cet inconvénient a une incidence sur la mainte­nance et l'entretien du four dans lequel le taux de rupture des résistances est relativement élevé. On notera également que ces dispositions fixent une fois pour toutes la puis­ sance de chauffe installée par unité de surface, qui dépend du pas d'écartement des goulottes et que, par ailleurs dans le cas des ancrages, il est formé des ponts thermi­ques entre l'infrastructure et les supports des résistan­ces.Such materials are ill-suited for fixing the electrical resistors constituting the heating elements of the oven. This fixing is currently obtained either by making in the thickness of these materials, chutes open on the oven in which the resistors are arranged, or by anchoring means in dense refractory fixed to the infrastructure of the oven or to a frame. arranged in the tablecloth or the panels. The disadvantages of these arrangements are of several orders: one of them lies in the fact that the resistors are more or less enclosed in the trunking, which is particularly true for the resistors arranged in a vault, which significantly reduces the power radiating from these heating elements. Another drawback is due to the expansion of these resistances, and to their retraction, during stops, starts, and modifications of the heating power; the length variations which result therefrom are the cause of a relative movement of the resistances with respect to the walls of the chute which on the one hand causes wear of the resistive wire because the material forming the lining is very abrasive, this wear being the cause a reduction in cross-section and therefore in local overheating of the resistors which can lead to their rupture, and on the other hand leads to a fairly rapid deterioration of the lining itself. This drawback affects the maintenance and upkeep of the furnace in which the resistance failure rate is relatively high. It will also be noted that these provisions fix once and for all the then heater installed per unit area, which depends on the spacing of the trunking and that, moreover in the case of anchors, thermal bridges are formed between the infrastructure and the resistance supports.

La présente invention entend remédier à ces inconvénients en proposant un dispositif de support de résistances au moyen duquel on renforce les qualités méca­niques du matériau réfractaire et/ou isolant permettant la mise en place d'une patte ou potence de support de la résis­tance elle-même, qui se trouve alors supportée à l'extérieur du matériau sans contact avec celui-ci, pouvant ainsi librement se dilater ou se rétracter et bénéficiant d'un coefficient de rayonnement maximum. On notera que le maté­riau de garniture dont il est question est isolant et/ou réfractaire selon sa densité et sa composition, cela de manière connue.The present invention intends to remedy these drawbacks by proposing a resistance support device by means of which the mechanical qualities of the refractory and / or insulating material are reinforced allowing the establishment of a lug or support bracket for the resistance itself , which is then supported outside the material without contact with it, thus being able to freely expand or retract and benefiting from a maximum radiation coefficient. It will be noted that the lining material in question is insulating and / or refractory according to its density and its composition, this in a known manner.

A cet effet l'invention a donc pour objet un dispositif pour permettre le support de résistances chauffantes par une paroi de garniture fragile et de faible qualité mécanique constitué par un insert en forme de gaine fendue logé dans un évidement de la paroi, parallèle à sa face extérieure, et débouchant latéralement sur ladite face également par une fente, le profil de la gaine et le profil du logement étant complémentaires de manière à inter­dire une rotation de l'une par rapport à l'autre, et par une potence dont une extrémité est logée dans ladite gaine pour y venir en butée sous l'effet d'une charge appliquée à son autre extrémité située en porte-à-faux par rapport à ladite face extérieure du revêtement.To this end, the subject of the invention is therefore a device for enabling the support of heating resistors by a wall of fragile packing of poor mechanical quality constituted by an insert in the form of a split sheath housed in a recess in the wall, parallel to its outer face, and opening laterally on said face also by a slot, the profile of the sheath and the profile of the housing being complementary so as to prevent rotation of one relative to the other, and by a bracket, one end of which is housed in said sheath to come into abutment therefrom under the effect of a load applied to its other end located in overhang relative to said outer face of the coating.

De manière préférée, l'extrémité de la potence logée dans la gaine est déformée de sorte que l'épaisseur du volume qu'elle balaie en étant déplacée per­pendiculairement à la paroi est supérieure à la largeur de la fente de la gaine.Preferably, the end of the bracket housed in the sheath is deformed so that the thickness of the volume which it sweeps while being moved perpendicular to the wall is greater than the width of the slot in the sheath.

Il sera également préféré de pourvoir ladite potence d'un retour perpendiculaire pour former appui de cette dernière sur la paroi située sous ladite fente.It will also be preferred to provide said bracket with a perpendicular return to form support of the latter on the wall located under said slot.

L'invention sera mieux comprise au cours de la description donnée ci-après à titre d'exemple purement indicatif et non limitatif qui permettra d'en dégager les avantages et les caractéristiques secondaires.The invention will be better understood during the description given below by way of purely indicative and nonlimiting example which will make it possible to identify the advantages and the secondary characteristics thereof.

Il sera fait référence aux dessins annexés dans lesquels :

  • - la figure 1 est une vue schématique en coupe du dispositif conforme à l'invention,
  • - la figure 2 illustre une variante de réa­lisation du dispositif de la figure 1.
Reference will be made to the appended drawings in which:
  • FIG. 1 is a schematic sectional view of the device according to the invention,
  • - Figure 2 illustrates an alternative embodiment of the device of Figure 1.

En se reportant à ces figures, et notamment à la figure 1, on voit une paroi réfractaire 1, ou un revê­tement isolant intérieur d'un four industriel, comportant un évidement 2, ici horizontal et parallèle à la face 1a de la paroi 1, cet évidement 2 s'ouvrant sur cette paroi 1a par une fente 3. On notera que l'évidement de la figure 1 est sensiblement cylindrique sauf pour deux portions 2a et 2b qui s'étendent radialement vers l'extérieur à partir de la partie principale cylindrique, à l'opposé de la fente 3.Referring to these figures, and in particular to FIG. 1, we can see a refractory wall 1, or an insulating lining inside an industrial oven, comprising a recess 2, here horizontal and parallel to the face 1a of the wall 1, this recess 2 opening onto this wall 1a by a slot 3. It will be noted that the recess in FIG. 1 is substantially cylindrical except for two portions 2a and 2b which extend radially outwards from the main part cylindrical, opposite the slot 3.

Dans l'évidement 2, on a glissé une gaine 4 de forme généralement tubulaire, dont le profil extérieur correspond au profil de l'évidement 2, et pour ce faire comporte deux ailes radiales 4a et 4b logées dans les extensions 2a et 2b de l'évidement, ladite gaine 4 étant ouverte à l'opposé des ailes 4a et 4b par une fente 5 qui se trouve ainsi située en regard de la fente 3. Cette gaine sera de préférence constituée par un matériau réfractaire isolant du genre céramique ou analogue. La disposition des ailes 4a et 4b de la gaine 4 dans les logements 2a et 2b de l'évidement 2 interdit la rotation de la gaine dans le logement 2. Bien entendu, toute autre forme de section parvenant à ce résultat peut convenir. L'incorporation de la gaine 4 dans l'évidement 2 sera obtenue, de manière préférée en réalisant un surmoulage du panneau autour des différentes gaines qu'il comporte, par des techniques de fabrication connues.In the recess 2, a sheath 4 of generally tubular shape has been slid, the external profile of which corresponds to the profile of the recess 2, and to do this comprises two radial wings 4a and 4b housed in the extensions 2a and 2b of l 'Recess, said sheath 4 being open opposite the wings 4a and 4b by a slot 5 which is thus located opposite the slot 3. This sheath will preferably be constituted by an insulating refractory material of the ceramic or similar kind. The arrangement of the wings 4a and 4b of the sheath 4 in the housings 2a and 2b of the recess 2 prohibits the rotation of the sheath in the housing 2. Of course, any other form of section achieving this result may be suitable. The incorporation of the sheath 4 in the recess 2 will be obtained, preferably by performing an overmolding of the panel around the various sheaths which it comprises, by known manufacturing techniques.

Le dispositif selon l'invention comporte également une potence 6 constituée par une patte 6a et un retour perpendiculaire 6b relié à la patte 6a par un gousset 6c. La patte 6a s'étend au-delà du retour 6b par une extrémité 7 qui est logée au travers des fentes 3 et 5 à l'intérieur de la gaine 4. Cette extrémité 7 est déformée de manière que l'épaisseur E du volume qu'elle balaierait, si elle était déplacée perpendiculairement à la face 1a de la paroi 1, soit inférieure à la largeur(e) des fentes 3 et 5. Ainsi, pour introduire la potence 6 dans la gaine 4, il faut pratiquer un mouvement louvoyant pour mermettre le passage de l'extrémité 7 dans les fentes 3 et 5. Cette dis­position constitue un verrouillage de la potence dans la gaine 4.The device according to the invention also comprises a bracket 6 constituted by a lug 6a and a perpendicular return 6b connected to the lug 6a by a gusset 6c. The tab 6a extends beyond the return 6b by an end 7 which is housed through slots 3 and 5 inside the sheath 4. This end 7 is deformed so that the thickness E of the volume qu '' it would sweep, if it was moved perpendicular to the face 1a of the wall 1, that is to say less than the width ( e ) of the slots 3 and 5. Thus, to introduce the stem 6 into the sheath 4, it is necessary to practice a wiggling movement to allow the passage of the end 7 into the slots 3 and 5. This arrangement constitutes a locking of the stem in the sheath 4.

Une charge, par exemple une résistance, ou son support, appliquée à l'autre extrémité 8 de la patte 6a, en absence du retour 6b, tendra à faire tourner cette patte autour de son point d'appui sur le bord inférieur de la fente 5 de la gaine 4, ce mouvement étant contrarié par l'appui de la patte 7 contre la paroi intérieure de la gaine 4 qui est elle-même immobilisée en rotation contre l'effet de ce couple par les ailes 4a et 4b. On voit donc que la charge quasi-ponctuelle que supporte la patte 6a est fina­lement transmise à la paroi réfractaire 1 au travers des surfaces des ailes 4a et 4b qui en constituent une répar­tition telle que les caractéristiques de la paroi 1 sont compatibles avec la charge par unité de surface qu'elle encaisse.A load, for example a resistor, or its support, applied to the other end 8 of the tab 6a, in the absence of the return 6b, will tend to rotate this tab around its fulcrum on the lower edge of the slot 5 of the sheath 4, this movement being thwarted by the support of the tab 7 against the inner wall of the sheath 4 which is itself immobilized in rotation against the effect of this torque by the wings 4a and 4b. It can therefore be seen that the quasi-point load that the leg 6a supports is finally transmitted to the refractory wall 1 through the surfaces of the wings 4a and 4b which constitute a distribution such that the characteristics of the wall 1 are compatible with the load by unit of area it collects.

Le retour 6b, en prenant appui sur la face extérieure 1a de la paroi réfractaire, soulage pour partie la gaine 4 des efforts qu'elle subit. On aura pris la pré­caution de disposer d'une semelle, pour le retour 6B, de surface suffisamment importante pour éviter sa pénétration dans la garniture.The return 6b, by resting on the outer face 1a of the refractory wall, partially relieves the sheath 4 from the forces it undergoes. We will have taken the precaution of having a sole, for the return 6B, of sufficient surface area to prevent its penetration into the lining.

Une disposition avantageuse facultative, non représentée, consiste en un ergot faisant saillie de la semelle pour pénétrer dans le panneau et constituer un verrouillage à l'encontre de sollicitations tendant à faire tourner la potence autour de son ancrage. On notera en outre que l'extrémité 8 de la patte 6a est conformée de façon à accueillir l'élément chauffant ou son support. Enfin, la potence 6 peut posséder une patte 6a qui forme un angle aigu ou obtus avec la semelle 6b. Par cette dispo­sition, on peut fixer dans une même gaine des pattes qui fournissent plusieurs niveaux de support et on peut ainsi installer plusieurs éléments chauffants, ou faire facilement varier leur nombre.An optional advantageous arrangement, not shown, consists of a lug projecting from the sole to penetrate the panel and constitute a locking against stresses tending to rotate the stem around its anchoring. It will also be noted that the end 8 of the tab 6a is shaped so as to receive the heating element or its support. Finally, the stem 6 may have a tab 6 a which forms an acute or obtuse angle with the sole 6 b . By this arrangement, it is possible to fix in the same sheath lugs which provide several levels of support and it is thus possible to install several heating elements, or to easily vary their number.

La figure 2 montre schématiquement une gaine 4′ dont la section est sensiblement triangulaire, qui constitue une variante de réalisation de la gaine 4. La déformation de l'extrémité 7′ de la potence 6′ sera adaptée à la forme de la section de la gaine 4′.Figure 2 schematically shows a sheath 4 'whose section is substantially triangular, which constitutes an alternative embodiment of the sheath 4. The deformation of the end 7' of the bracket 6 'will be adapted to the shape of the section of the sheath 4 ′.

Les dispositions de l'invention peuvent également s'appliquer au support des résistances placées en voute de four. On pourra à cet effet utiliser une gaine telle que 4′, la potence 6′ ayant une extrémité 7′ telle que, par exemple, on puisse l'introduire dans les fentes 3′ 5′ dans une certaine orientation et, après introduction, en modifiant cette orientation, verrouiller ladite extrémité 7′ à l'intérieur de la gaine 4′.The provisions of the invention can also apply to the support of resistors placed in the vault of an oven. For this purpose, it is possible to use a sheath such as 4 ′, the stem 6 ′ having an end 7 ′ such that, for example, it can be introduced into the slots 3 ′ 5 ′ in a certain orientation and, after introduction, in modifying this orientation, lock said end 7 ′ inside the sheath 4 ′.

L'invention trouve une application inté­ressante dans le domaine de la construction des fours industriels.The invention finds an interesting application in the field of construction of industrial ovens.

Claims (4)

1. Dispositif pour permettre le support de résistances chauffantes par une paroi (1) de garniture en matériau fragile et de faible qualité mécanique, caractérisé en ce qu'il est constitué par un insert (4) en forme de gaine fendue logé dans un évidement (2a) de la paroi (1) parallèle à sa face extérieure (1a), et débou­chant latéralement sur ladite face (1a) également par une fente (3), le profil de la gaine (4) et le profil du loge­ment (2) étant complémentaires de manière à interdire une rotation de l'une par rapport à l'autre, et par une potence (6) dont une extrémité (7) est logée dans ladite gaine pour y venir en butée sous l'effet d'une charge appliquée à son autre extrémité 8 située en porte-à-faux par rapport à ladite face extérieure (1a).1. Device for enabling the support of heating resistors by a wall (1) of a lining made of fragile material and of poor mechanical quality, characterized in that it is constituted by an insert (4) in the form of a split sheath housed in a recess (2a) of the wall (1) parallel to its outer face (1a), and opening laterally on said face (1a) also by a slot (3), the profile of the sheath (4) and the profile of the housing (2 ) being complementary so as to prevent rotation of one with respect to the other, and by a bracket (6) one end (7) of which is housed in said sheath to come into abutment therefrom under the effect of a load applied to its other end 8 located in overhang with respect to said outer face (1a). 2. Dispositif selon la revendication 1, caractérisé en ce que l'extrémité (7) de ladite potence logée dans la gaine est déformée de sorte que l'épaisseur (E) du volume qu'elle balaie, en étant déplacée perpendi­culairement à la paroi 1, est supérieure à la largeur (e) de la fente (5) de la gaine (4).2. Device according to claim 1, characterized in that the end (7) of said bracket housed in the sheath is deformed so that the thickness (E) of the volume which it sweeps, by being moved perpendicular to the wall 1, is greater than the width ( e ) of the slot (5) of the sheath (4). 3. Dispositif selon la revendication 2, caractérisé en ce que ladite potence (6) comporte un retour (6b) perpendiculaire pour former appui sur la surface exté­rieure (1a) de la paroi, sous la fente (3).3. Device according to claim 2, characterized in that said bracket (6) has a return (6b) perpendicular to form support on the outer surface (1a) of the wall, under the slot (3). 4. Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que la potence (6) comporte à son extrémité (8) en porte-à-faux une confor­mation d'accueil de l'élément chauffant ou son support.4. Device according to any one of the preceding claims, characterized in that the bracket (6) comprises, at its end (8) in overhang, a configuration for receiving the heating element or its support.
EP88401978A 1987-07-31 1988-07-29 Device for supporting heating resistances along a brittle refractory and/or insulating wall Withdrawn EP0301973A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8710918 1987-07-31
FR8710918A FR2618972B1 (en) 1987-07-31 1987-07-31 DEVICE FOR SUPPORTING HEATING RESISTORS ALONG A FRAGILE REFRACTORY AND / OR INSULATING WALL

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EP0301973A1 true EP0301973A1 (en) 1989-02-01

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR770772A (en) * 1933-03-28 1934-09-20 Siemens Ag Support device for the heating elements of an electric oven
US2744946A (en) * 1953-11-25 1956-05-08 L & L Mfg Company Electric furnace and heating unit therefor
FR2404819A1 (en) * 1977-09-29 1979-04-27 Roissac Andre Heating element supporting mechanism for furnaces - allowing heating element exchange without damaging weak furnace wall
FR2406793A1 (en) * 1977-10-24 1979-05-18 Produits Refractaires Furnace heating resistance support bracket - consists of hollow flanged plug packed with refractory fibres and receiving insert with inclined support surface

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR770772A (en) * 1933-03-28 1934-09-20 Siemens Ag Support device for the heating elements of an electric oven
US2744946A (en) * 1953-11-25 1956-05-08 L & L Mfg Company Electric furnace and heating unit therefor
FR2404819A1 (en) * 1977-09-29 1979-04-27 Roissac Andre Heating element supporting mechanism for furnaces - allowing heating element exchange without damaging weak furnace wall
FR2406793A1 (en) * 1977-10-24 1979-05-18 Produits Refractaires Furnace heating resistance support bracket - consists of hollow flanged plug packed with refractory fibres and receiving insert with inclined support surface

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FR2618972A1 (en) 1989-02-03
FR2618972B1 (en) 1989-12-01

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