WO2005106314A1 - Thermal protection jacket - Google Patents

Thermal protection jacket Download PDF

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Publication number
WO2005106314A1
WO2005106314A1 PCT/FR2005/001019 FR2005001019W WO2005106314A1 WO 2005106314 A1 WO2005106314 A1 WO 2005106314A1 FR 2005001019 W FR2005001019 W FR 2005001019W WO 2005106314 A1 WO2005106314 A1 WO 2005106314A1
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WO
WIPO (PCT)
Prior art keywords
cover
cover according
face
profile
smooth
Prior art date
Application number
PCT/FR2005/001019
Other languages
French (fr)
Inventor
Christian Bressan
Original Assignee
Conseils, Consultations Techniques 'industrie-Artisanat'
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 Conseils, Consultations Techniques 'industrie-Artisanat' filed Critical Conseils, Consultations Techniques 'industrie-Artisanat'
Priority to EP05762402A priority Critical patent/EP1743115A1/en
Publication of WO2005106314A1 publication Critical patent/WO2005106314A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials

Definitions

  • the invention relates to a thermal protection cover.
  • production machines sometimes have parts that are heated for production purposes. We also have to circulate hot fluids in pipes.
  • Document DE 4100274 proposes insulated pipes for transporting hot fluids. These pipes have a central silicone or polytetrafluoroethylene (PTFE) pipe surrounded by silicone or PTFE foam. Thermal insulation is thus obtained to reduce heat loss.
  • PTFE polytetrafluoroethylene
  • the surface temperature outside the pipes is reduced compared to uninsulated pipes.
  • the machines also include parts brought to high temperatures, of the order of 120 to 200 ° C, or even more.
  • foam is a material that can be crushed under the pressure of one hand. In this case, the thickness of the foam is reduced, and the thermal insulation may no longer be sufficient to avoid burns. It is therefore an objective of the invention to provide a protective cover making it possible to avoid burns, with a limited space requirement and easy implementation.
  • the invention relates to a thermal protection cover made of silicone elastomer comprising an inner face intended to come into contact with a hot body, an outer face intended to be in the open air, characterized in that that the inner face is smooth and the outer face has notches to increase the heat exchange surface with the open air.
  • a silicone elastomer for this cover makes it possible to guarantee the hold of the cover despite the high temperatures.
  • the material is flexible enough to be shaped as needed.
  • the notches in the outer surface leave studs between them. It can be seen that the hottest external parts are the bottom of the notches, and the warmest parts are on the external surface at the level of the studs.
  • the heat from the inner face is dissipated by the surface of the notches and goes up towards the outer face in a limited way. If a person comes into contact with the cover, they will only touch the upper part of the studs which is the warmest part.
  • Another advantage of the material is that it is difficult to compress manually and that it substantially retains its thickness, and therefore its insulation. thermal when a person presses it.
  • Another advantage is that the material is compatible with the constraints of the food industry.
  • the notches are grooves parallel to each other.
  • the cover is suitable for manufacture by extrusion and the thermal properties remain advantageous.
  • the grooves have a trapezoidal section, the large base being aligned with the outer surface.
  • the surface exposed to contact with a person is flat and less likely to crush.
  • the surface of the external face is greater than at least twice the surface of the internal face. There is thus a surface which allows the cooling of the external face and of reducing the surface temperature of the part of the outermost face.
  • the cover has a thickness of between 4 and 7 mm, for example 6 mm, and the notches have a depth of at least half the thickness. It is found that this thickness is sufficient to lower the surface temperature without the risk of burns when the temperature of the hot room is 150 to 250 ° C.
  • the silicone elastomer has a hardness of between 40 and 60 Shore A.
  • a profile is used having a hollow rectangular section, one of the outer faces of the profile being smooth and the three outer faces being grooved.
  • a wall of the profile is extended by a flap which has a tongue, another wall having a slot in which the tongue is inserted to maintain the flap in a folded position.
  • the invention also relates to a profile for forming a cover for covering an injector, the profile having a hollow rectangular section, one of the outer faces of the profile being smooth and the three outer faces being grooved.
  • FIG. 1 is a sectional view of a plate conforming to a first embodiment of the invention
  • Figure 2 is a view similar to Figure 1 of a plate according to a second embodiment of one invention
  • Figure 3 is a perspective view of a cover according to a third embodiment of one invention before folding the flaps
  • Figure 4 is a view similar to Figure 3, the flaps being in the folded position
  • Figure 5 is a bottom view of the cover of Figure 4
  • Figure 6 is a sectional view along line VI-VI of Figure 5
  • - Figure 7 is a top view of a blank cut from a plate according to Figure 1
  • Figure 8 is a perspective view of a cover according to a fourth embodiment made from the blank of Figure 7
  • - Figure 9 is a perspective view of a cover according to a fifth embodiment, in place on a glue injection device;
  • FIG. 1 is a sectional view of a plate conforming to a first embodiment of the invention
  • Figure 2 is a view similar to Figure 1 of a plate according to a
  • a plate 1 is produced, for example by extrusion or by molding, according to the section shown on FIG. 1.
  • This section has an inner face 10, flat and smooth, and an outer face 11 parallel to the inner face 10.
  • the outer face has grooves 12 of trapezoidal section, the large base being aligned with the outer face 11, leaving tenons 13 between the grooves.
  • the thickness of the plate 1, that is to say the distance between the inner face and the outer face, is between 4 and 6 mm, for example 5 mm.
  • the depth of the grooves 12 is greater than half the thickness.
  • the plate 1 is made of silicone elastomer with a hardness of 60 Shore A.
  • a plate 2 has grooves 22 whose bottom 24 is rounded, as is the upper part studs 23. This plate is shown in FIG. 2.
  • a cover 3 is intended to protect an adhesive injector, of the type of those described in document EP 721 802.
  • the cover is produced from a profile, the section of which is shown in FIG. 6.
  • This profile of hollow rectangular section, has three walls 31, 32 provided on their outer face with grooves of trapezoidal section, the fourth 33 wall being smooth. As seen in Figure 3, the profile is cut to form the cover 3. Part of the smooth wall 33 is removed to leave only a bridge 35, visible in Figure 5, between the walls side 31.
  • Each side wall 31 has two slots 310.
  • a flap 320 is provided at each end of the wall 32.
  • a notch 322 is made on the studs of the wall 32 to facilitate folding of the flap 320.
  • the flaps 320 are also separated from the side walls 31 by a cutout extending the inside face of the side walls 31 at the level of the flaps 320.
  • a cutout 311 at each end of the side walls 31 makes it possible to form tabs 321 fixed to one of the flaps 320.
  • the flaps 320 are folded towards the inside of the profile, substantially at right angles, and the tongues 321 are inserted into the corresponding slots 310.
  • the tabs 321 remain locked in the slots 310, which makes it possible to maintain the flaps in the folded position, as shown in FIGS. 4 and 5.
  • a cover 4 is produced from a blank cut from a plate 1, such as that shown in FIG. 1.
  • the blank comprises successively in a transverse direction F1 a first side wall 41, a bottom wall 42, a second side wall 43 and an upper wall 44.
  • the first side wall 41 has two first slots 410 aligned in the transverse direction F1 along a first edge 411, and a second slot 412 along a second edge 413, perpendicular to the transverse direction Fl.
  • the second side wall 43 is extended by a flap 45 along a third edge 430 parallel to the first edge 411.
  • the flap 45 is extended by two tabs 450 along a fourth bo rd 451 parallel to the third edge 430.
  • the upper wall 44 is extended by a tongue 440 along a fifth edge 441 parallel at the second edge 413.
  • the four walls 41, 42, 43, 44 are folded down in a rectangular section, as shown in FIG. 8, the fifth edge 441 running along the second edge 413.
  • the flap 45 is folded down to close the rectangular section, the tongue 440 being inserted into the slot 412 to maintain the flap 45 in the folded position.
  • a cover 4 is capable of covering an adhesive injector fixed on a metal plate.
  • a complete cover 5 comprising five faces is produced by molding.
  • This cover 5 is suitable for a glue injection device 6 which comprises a rectangular body, an electrical power cable 61, a connector 62 for an arrival of glue in liquid phase on a rear face of the body and a nozzle. injection 63 of the glue on a lower face of the body.
  • a support clamp 64 is fixed to the body in the upper part and allows the device 6 to be fixed to a frame, not shown.
  • a front face 65 of the body is not covered by the cover 5.
  • the cover 5 has a notch 51 at the nozzle, and two cutouts 52, 53 facing the electric power cable 61 and the connector 62. Each face of the cover intended to be in contact with the injection device is smooth, while the outer faces have trapezoidal grooves.
  • Example A round steel section with a diameter of 20 mm, length 100 mm incorporating an electrical heating resistance was protected by a cover produced by winding a plate according to the first embodiment.
  • This plate was 5 mm thick, for a groove depth of 3 mm.
  • the temperature measured on the external face did not exceed step 55 ° C.
  • the ratio of the external surface to the internal surface is approximately 2.6.
  • the invention is not limited to the embodiments which have just been described by way of example.
  • Other profiled shapes can be produced or by folding flat plates, adapted in shape and size to the equipment to be protected.
  • the grooves could form a grid so as to leave studs between them.
  • the thickness of the cover can be adapted according to the maximum temperature of the body to be protected and the insulating power of the material of the cover.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)

Abstract

The invention concerns a thermal protection jacket made of silicone elastomer comprising an inner surface (10) designed to be urged into contact with a hot body, an outer surface (11) designed to be in contact with the atmosphere. The inner surface (10) is smooth and the outer surface (11) comprises notches (12) to increase the heat-exchanging surface with the atmosphere. The invention is useful for protecting hot parts on machines.

Description

Housse de protection thermique. Thermal protection cover.
L'invention concerne une housse de protection thermique. Dans l'industrie, les machines de production comportent quelquefois des pièces qui sont chauffées pour les besoins de la production. On est aussi amené à faire circuler des fluides chauds dans des canalisations . Le document DE 4100274 propose des conduites isolées pour transporter des fluides chauds . Ces conduites comportent un tuyau central en silicone ou en polytetrafluoroethylene (PTFE) entouré d'une mousse de silicone ou de PTFE. On obtient ainsi une isolation thermique pour réduire la déperdition thermique. De plus, la température de surface à l'extérieur des conduites est diminuée par rapport à des conduites non isolées . Cependant, les machines comportent également des pièces portées à des températures importantes, de l'ordre de 120 à 200 °C, voire plus. En cas d'opération de maintenance, même si la machine est arrêtée, les parties de ces pièces exposées à l'air libre sont des points dangereux pour les techniciens qui interviennent, si un temps suffisamment long ne s'est pas écoulé depuis l'arrêt. En effet, on peut considérer qu'une personne risque de subir des brûlures si elle touche avec la peau une pièce dont la température est supérieure à 50 - 55°C. On trouve de telles pièces dans les systèmes d'encollage dans lesquels de la colle est rendue liquide par chauffage et déposée par des injecteurs. Le document EP 721 802 montre un tel injecteur. Cet injecteur est monté sur un distributeur ayant une forme de plaque métallique. Plusieurs injecteurs de ce type peuvent être montés sur une plaque. Les tuyaux proposés par le document DE 4100274 ne permettent pas d'isoler ces pièces chaudes. Si on utilisait la même mousse pour isoler les pièces chaudes, on obtiendrait des enveloppes de protection relativement épaisses, de l'ordre de 10 à 20 mm, ce qui est parfois incompatible avec l'espace disponible. De plus, la mousse est un matériau qui peut s'écraser sous la pression d'une main. Dans ce cas, l'épaisseur de la mousse se réduit, et l'isolation thermique risque de ne plus être suffisante pour éviter une brûlure. C'est donc un objectif de l'invention de fournir une housse de protection permettant d'éviter des brûlures, avec un encombrement limité et une mise en œuvre aisée. Avec ces objectifs en vue, l'invention a pour objet une housse de protection thermique en élastomère de silicone comportant une face intérieure destinée à venir en contact avec un corps chaud, une face extérieure destinée à être à l'air libre, caractérisé en ce que la face intérieure est lisse et la face extérieure comporte des encoches pour augmenter la surface d'échange thermique avec l'air libre. L'utilisation d'un élastomère de silicone pour cette housse permet de garantir la tenue de la housse malgré les températures élevées. De plus, le matériau est suffisamment souple pour être mise en forme selon les besoins . Les encoches dans la surface extérieure laissent entre elles des plots. On constate que les parties extérieures les plus chaudes sont le fond des encoches, et les parties les moins chaudes sont sur la surface extérieure au niveau des plots. En effet, la chaleur en provenance de la face intérieure est évacuée par la surface des encoches et remonte vers la face extérieure de manière limitée. Si une personne vient en contact avec la housse, elle ne touchera que la partie supérieure des plots qui est la partie la moins chaude. Un autre avantage du matériau est qu'il est difficile à comprimer manuellement et qu'il conserve sensiblement son épaisseur, et donc son isolation thermique lorsqu'une personne appuie dessus. Un autre avantage est que le matériau est compatible avec les contraintes de l'industrie agroalimentaire. De manière avantageuse, les encoches sont des rainures parallèles entre elles. Ainsi, la housse se prête à une fabrication par extrusion et les propriétés thermiques restent avantageuses. De manière particulière, les rainures ont une section trapézoïdale, la grande base étant alignée avec la surface extérieure. Ainsi, la surface exposée au contact d'une personne est plane et moins susceptible de s 'écraser. Selon une caractéristique de la housse, la surface de la face extérieure est supérieure au moins au double de la surface de la face intérieure. On a ainsi une surface qui permet le refroidissement de la face extérieure et de diminuer la température de surface de la partie de la face la plus extérieure. De préférence, la housse a une épaisseur comprise entre 4 et 7 mm, par exemple 6 mm, et les encoches ont une profondeur d'au moins la moitié de l'épaisseur. On constate que cette épaisseur est suffisante pour abaisser la température de surface sans avoir de risque de brûlure lorsque la température de la pièce chaude est de 150 à 250 °C. Par exemple, l' élastomère en silicone a une dureté comprise entre 40 et 60 Shore A. Il a ainsi une dureté suffisante pour résister à un enfoncement, et une souplesse suffisante pour accepter d'être plié et maintenu autour de la pièce chaude. Selon un mode de réalisation de la housse, on utilise un profilé ayant une section rectangulaire creuse, l'une des faces extérieures du profilé étant lisse et les trois faces extérieures étant rainurées. On peut ainsi habiller facilement des injecteurs du type de ceux exposés dans le document EP 721 802, comme on le verra mieux par la suite. Selon une caractéristique particulière, une paroi du profilé se prolonge par un rabat qui comporte une languette, une autre paroi comportant une fente dans laquelle la languette est introduite pour maintenir le rabat dans une position rabattue. L'invention a aussi pour objet un profilé pour former une housse pour habiller un injecteur, le profilé ayant une section rectangulaire creuse, l'une des faces extérieures du profilé étant lisse et les trois faces extérieures étant rainurées . L'invention sera mieux comprise et d'autres particularités et avantages apparaîtront à la lecture de la description qui va suivre, la description faisant référence aux dessins annexés parmi lesquels : la figure 1 est une vue en coupe d'une plaque conforme à un premier mode de réalisation de 1 ' invention ; la figure 2 est une vue similaire à la figure 1 d'une plaque selon un deuxième mode de réalisation de 1 ' invention ; la figure 3 est une vue en perspective d'une housse selon un troisième mode de réalisation de 1 ' invention avant rabattement des rabats ; la figure 4 est une vue similaire à la figure 3 , les rabats étant en position rabattue ; la figure 5 est une vue de dessous de la housse de la figure 4 ; la figure 6 est une vue de la section selon la ligne VI-VI de la figure 5 ; - la figure 7 est une vue de dessus d'un flan découpé dans une plaque selon la figure 1 ; la figure 8 est une vue en perspective d'une housse selon un quatrième mode de réalisation réalisée à partir du flan de la figure 7 ; - la figure 9 est une vue en perspective d'une housse selon un cinquième mode de réalisation, en place sur un dispositif d'injection de colle ; la figure 10 est une vue en perspective de l'arrière de la housse de la figure 9. Selon un premier mode de réalisation de l'invention, une plaque 1 est réalisée, par exemple par extrusion ou par moulage, selon la section montrée sur la figure 1. Cette section comporte une face intérieure 10, plane et lisse, et une face extérieure 11 parallèle à la face intérieure 10. La face extérieure comporte des rainures 12 de section trapézoïdale, la grande base étant alignée avec la face extérieure 11, laissant subsister des tenons 13 entre les rainures. L'épaisseur de la plaque 1, c'est-à-dire la distance entre la face intérieure et la face extérieure, est comprise entre 4 et 6 mm, par exemple 5 mm. La profondeur des rainures 12 est supérieure à la moitié de l'épaisseur. La plaque 1 est réalisée en élastomère de silicone de dureté de 60 Shore A. Dans un deuxième mode de réalisation, variante du premier mode de réalisation, une plaque 2 comporte des rainures 22 dont le fond 24 est arrondi, de même que la partie supérieure des tenons 23. Cette plaque est montrée sur la figure 2. Dans un troisième mode de réalisation, représenté sur les figures 3 à 6, une housse 3 est destiné à protéger un injecteur de colle, du type de ceux exposés dans le document EP 721 802. La housse est réalisée à partir d'un profilé dont la section est montrée sur la figure 6. Ce profilé, de section rectangulaire creuse, comporte trois parois 31, 32 munies sur leur face extérieure de rainures de section trapézoïdale, la quatrième 33 paroi étant lisse. Comme on le voit sur la figure 3, le profilé est découpé pour former la housse 3. Une partie de la paroi lisse 33 est supprimée pour laisser subsister uniquement un pont 35, visible sur la figure 5, entre les parois latérales 31. Chaque paroi latérale 31 comporte deux fentes 310. Un rabat 320 est prévu à chaque extrémité de la paroi 32. Pour cela, une entaille 322 est pratiquée sur les tenons de la paroi 32 pour faciliter le pliage du rabat 320. Les rabats 320 sont également séparés des parois latérales 31 par une découpe prolongeant la face intérieure des parois latérales 31 au niveau des rabats 320. Une découpe 311 à chaque extrémité des parois latérales 31 permet de former des languettes 321 fixées sur l'un des rabats 320. Pour réaliser la housse 3, les rabats 320 sont plies vers l'intérieur du profilé, sensiblement à angle droit, et les languettes 321 sont introduites dans les fentes 310 correspondantes. Les languettes 321 restent bloquées dans les fentes 310, ce qui permet de maintenir les rabats dans la position rabattue, telle que montrée sur les figures 4 et 5. Dans un quatrième mode de 1 ' invention, montré sur les figures 7 et 8, une housse 4 est réalisée à partir d'un flan découpé dans une plaque 1, telle que celle montrée sur la figure 1. Le flan comporte successivement dans une direction transversale Fl une première paroi latérale 41, une paroi inférieure 42, une deuxième paroi latérale 43 et une paroi supérieure 44. La première paroi latérale 41 comporte deux premières fentes 410 alignées selon la direction transversale Fl le long d'un premier bord 411, et une deuxième fente 412 le long d'un deuxième bord 413, perpendiculaire à la direction transversale Fl. La deuxième paroi latérale 43 se prolonge par un rabat 45 le long d'un troisième bord 430 parallèle au premier bord 411. Le rabat 45 se prolonge par deux languettes 450 le long d'un quatrième bord 451 parallèle au troisième bord 430. La paroi supérieure 44 se prolonge par une languette 440 le long d'un cinquième bord 441 parallèle au deuxième bord 413. Pour former la housse, les quatre parois 41, 42, 43, 44 sont rabattues selon une section rectangulaire, comme montré sur la figure 8, le cinquième bord 441 longeant le deuxième bord 413. Le rabat 45 est rabattu pour fermer la section rectangulaire, la languette 440 étant introduite dans la fente 412 pour maintenir le rabat 45 en position rabattue. Une telle housse 4 est apte à recouvrir un injecteur de colle fixé sur une plaque métallique. Selon un cinquième mode de réalisation, on réalise par moulage une housse 5 complète comportant cinq faces. Cette housse 5 est adaptée à un dispositif d'injection 6 de colle qui comporte un corps rectangulaire, un câble d'alimentation électrique 61, un connecteur 62 pour une arrivée de colle en phase liquide sur une face arrière du corps et une buse d'injection 63 de la colle sur une face inférieure du corps. Une pince de support 64 est fixée au corps en partie supérieure et permet la fixation du dispositif 6 à un bâti, non représenté. Une face avant 65 du corps n'est pas couverte par la housse 5. La housse 5 comporte une encoche 51 au niveau de la buse, et deux découpes 52, 53 en regard du câble d'alimentation électrique 61 et du connecteur 62. Chaque face de la housse destinée à être en contact avec le dispositif d'injection est lisse, tandis que les faces extérieures comportent des rainures trapézoïdales .The invention relates to a thermal protection cover. In industry, production machines sometimes have parts that are heated for production purposes. We also have to circulate hot fluids in pipes. Document DE 4100274 proposes insulated pipes for transporting hot fluids. These pipes have a central silicone or polytetrafluoroethylene (PTFE) pipe surrounded by silicone or PTFE foam. Thermal insulation is thus obtained to reduce heat loss. In addition, the surface temperature outside the pipes is reduced compared to uninsulated pipes. However, the machines also include parts brought to high temperatures, of the order of 120 to 200 ° C, or even more. In the event of a maintenance operation, even if the machine is stopped, the parts of these parts exposed to the open air are dangerous points for the technicians who intervene, if a sufficiently long time has not elapsed since the stop. Indeed, it can be considered that a person is at risk of being burned if he touches a piece of skin with a temperature above 50 - 55 ° C. Such parts are found in gluing systems in which glue is made liquid by heating and deposited by injectors. Document EP 721 802 shows such an injector. This injector is mounted on a distributor having the shape of a metal plate. Several injectors of this type can be mounted on a plate. The pipes proposed by document DE 4100274 do not allow these hot parts to be isolated. If we used the same foam to insulate hot parts, relatively thick protective envelopes would be obtained, of the order of 10 to 20 mm, which is sometimes incompatible with the space available. In addition, foam is a material that can be crushed under the pressure of one hand. In this case, the thickness of the foam is reduced, and the thermal insulation may no longer be sufficient to avoid burns. It is therefore an objective of the invention to provide a protective cover making it possible to avoid burns, with a limited space requirement and easy implementation. With these objectives in view, the invention relates to a thermal protection cover made of silicone elastomer comprising an inner face intended to come into contact with a hot body, an outer face intended to be in the open air, characterized in that that the inner face is smooth and the outer face has notches to increase the heat exchange surface with the open air. The use of a silicone elastomer for this cover makes it possible to guarantee the hold of the cover despite the high temperatures. In addition, the material is flexible enough to be shaped as needed. The notches in the outer surface leave studs between them. It can be seen that the hottest external parts are the bottom of the notches, and the warmest parts are on the external surface at the level of the studs. In fact, the heat from the inner face is dissipated by the surface of the notches and goes up towards the outer face in a limited way. If a person comes into contact with the cover, they will only touch the upper part of the studs which is the warmest part. Another advantage of the material is that it is difficult to compress manually and that it substantially retains its thickness, and therefore its insulation. thermal when a person presses it. Another advantage is that the material is compatible with the constraints of the food industry. Advantageously, the notches are grooves parallel to each other. Thus, the cover is suitable for manufacture by extrusion and the thermal properties remain advantageous. In particular, the grooves have a trapezoidal section, the large base being aligned with the outer surface. Thus, the surface exposed to contact with a person is flat and less likely to crush. According to one characteristic of the cover, the surface of the external face is greater than at least twice the surface of the internal face. There is thus a surface which allows the cooling of the external face and of reducing the surface temperature of the part of the outermost face. Preferably, the cover has a thickness of between 4 and 7 mm, for example 6 mm, and the notches have a depth of at least half the thickness. It is found that this thickness is sufficient to lower the surface temperature without the risk of burns when the temperature of the hot room is 150 to 250 ° C. For example, the silicone elastomer has a hardness of between 40 and 60 Shore A. It thus has sufficient hardness to withstand sinking, and sufficient flexibility to accept being folded and held around the hot piece. According to one embodiment of the cover, a profile is used having a hollow rectangular section, one of the outer faces of the profile being smooth and the three outer faces being grooved. One can thus easily dress injectors of the type of those exposed in the document EP 721 802, as is will see better later. According to a particular characteristic, a wall of the profile is extended by a flap which has a tongue, another wall having a slot in which the tongue is inserted to maintain the flap in a folded position. The invention also relates to a profile for forming a cover for covering an injector, the profile having a hollow rectangular section, one of the outer faces of the profile being smooth and the three outer faces being grooved. The invention will be better understood and other features and advantages will appear on reading the description which follows, the description referring to the accompanying drawings, in which: FIG. 1 is a sectional view of a plate conforming to a first embodiment of the invention; Figure 2 is a view similar to Figure 1 of a plate according to a second embodiment of one invention; Figure 3 is a perspective view of a cover according to a third embodiment of one invention before folding the flaps; Figure 4 is a view similar to Figure 3, the flaps being in the folded position; Figure 5 is a bottom view of the cover of Figure 4; Figure 6 is a sectional view along line VI-VI of Figure 5; - Figure 7 is a top view of a blank cut from a plate according to Figure 1; Figure 8 is a perspective view of a cover according to a fourth embodiment made from the blank of Figure 7; - Figure 9 is a perspective view of a cover according to a fifth embodiment, in place on a glue injection device; FIG. 10 is a perspective view of the rear of the cover of FIG. 9. According to a first embodiment of the invention, a plate 1 is produced, for example by extrusion or by molding, according to the section shown on FIG. 1. This section has an inner face 10, flat and smooth, and an outer face 11 parallel to the inner face 10. The outer face has grooves 12 of trapezoidal section, the large base being aligned with the outer face 11, leaving tenons 13 between the grooves. The thickness of the plate 1, that is to say the distance between the inner face and the outer face, is between 4 and 6 mm, for example 5 mm. The depth of the grooves 12 is greater than half the thickness. The plate 1 is made of silicone elastomer with a hardness of 60 Shore A. In a second embodiment, variant of the first embodiment, a plate 2 has grooves 22 whose bottom 24 is rounded, as is the upper part studs 23. This plate is shown in FIG. 2. In a third embodiment, shown in FIGS. 3 to 6, a cover 3 is intended to protect an adhesive injector, of the type of those described in document EP 721 802. The cover is produced from a profile, the section of which is shown in FIG. 6. This profile, of hollow rectangular section, has three walls 31, 32 provided on their outer face with grooves of trapezoidal section, the fourth 33 wall being smooth. As seen in Figure 3, the profile is cut to form the cover 3. Part of the smooth wall 33 is removed to leave only a bridge 35, visible in Figure 5, between the walls side 31. Each side wall 31 has two slots 310. A flap 320 is provided at each end of the wall 32. For this, a notch 322 is made on the studs of the wall 32 to facilitate folding of the flap 320. The flaps 320 are also separated from the side walls 31 by a cutout extending the inside face of the side walls 31 at the level of the flaps 320. A cutout 311 at each end of the side walls 31 makes it possible to form tabs 321 fixed to one of the flaps 320. To make the cover 3, the flaps 320 are folded towards the inside of the profile, substantially at right angles, and the tongues 321 are inserted into the corresponding slots 310. The tabs 321 remain locked in the slots 310, which makes it possible to maintain the flaps in the folded position, as shown in FIGS. 4 and 5. In a fourth embodiment of the invention, shown in FIGS. 7 and 8, a cover 4 is produced from a blank cut from a plate 1, such as that shown in FIG. 1. The blank comprises successively in a transverse direction F1 a first side wall 41, a bottom wall 42, a second side wall 43 and an upper wall 44. The first side wall 41 has two first slots 410 aligned in the transverse direction F1 along a first edge 411, and a second slot 412 along a second edge 413, perpendicular to the transverse direction Fl. The second side wall 43 is extended by a flap 45 along a third edge 430 parallel to the first edge 411. The flap 45 is extended by two tabs 450 along a fourth bo rd 451 parallel to the third edge 430. The upper wall 44 is extended by a tongue 440 along a fifth edge 441 parallel at the second edge 413. To form the cover, the four walls 41, 42, 43, 44 are folded down in a rectangular section, as shown in FIG. 8, the fifth edge 441 running along the second edge 413. The flap 45 is folded down to close the rectangular section, the tongue 440 being inserted into the slot 412 to maintain the flap 45 in the folded position. Such a cover 4 is capable of covering an adhesive injector fixed on a metal plate. According to a fifth embodiment, a complete cover 5 comprising five faces is produced by molding. This cover 5 is suitable for a glue injection device 6 which comprises a rectangular body, an electrical power cable 61, a connector 62 for an arrival of glue in liquid phase on a rear face of the body and a nozzle. injection 63 of the glue on a lower face of the body. A support clamp 64 is fixed to the body in the upper part and allows the device 6 to be fixed to a frame, not shown. A front face 65 of the body is not covered by the cover 5. The cover 5 has a notch 51 at the nozzle, and two cutouts 52, 53 facing the electric power cable 61 and the connector 62. Each face of the cover intended to be in contact with the injection device is smooth, while the outer faces have trapezoidal grooves.
Exemple Un profilé rond en acier de diamètre 20 mm, de longueur 100 mm incorporant une résistance électrique de chauffe a été protégé par une housse réalisée par l'enroulement d'une plaque selon le premier mode de réalisation. Cette plaque avait 5 mm d'épaisseur, pour une profondeur des rainures de 3 mm. En régime stabilisé, lorsque le profilé était maintenu à 160 °C, la température mesurée sur la face extérieure ne dépassait pas 55 °C. Le rapport entre la surface extérieure et la surface intérieure est environ de 2,6. L'invention n'est pas limitée aux modes de réalisation qui viennent d'être décrits à titre d'exemple. On pourra réaliser d'autres formes profilées ou par pliage de plaques planes, adaptées en forme et en dimension aux équipements à protéger. Les rainures pourraient former une grille de manière à laisser subsister des plots entre elles. L'épaisseur de la housse pourra être adaptée en fonction de la température maximale du corps à protéger et du pouvoir isolant du matériau constitutif de la housse. Example A round steel section with a diameter of 20 mm, length 100 mm incorporating an electrical heating resistance was protected by a cover produced by winding a plate according to the first embodiment. This plate was 5 mm thick, for a groove depth of 3 mm. In stabilized regime, when the profile was maintained at 160 ° C, the temperature measured on the external face did not exceed step 55 ° C. The ratio of the external surface to the internal surface is approximately 2.6. The invention is not limited to the embodiments which have just been described by way of example. Other profiled shapes can be produced or by folding flat plates, adapted in shape and size to the equipment to be protected. The grooves could form a grid so as to leave studs between them. The thickness of the cover can be adapted according to the maximum temperature of the body to be protected and the insulating power of the material of the cover.

Claims

REVENDICATIONS
1. Housse de protection thermique en élastomère de silicone comportant une face intérieure (10) destinée à venir en contact avec un corps chaud, une face extérieure1. Thermal protective cover made of silicone elastomer comprising an inner face (10) intended to come into contact with a hot body, an outer face
(11) destinée à être à l'air libre, caractérisé en ce que la face intérieure (10) est lisse et la face extérieure (11) comporte des encoches (12) pour augmenter la surface d'échange thermique avec l'air libre. (11) intended to be in the open air, characterized in that the internal face (10) is smooth and the external face (11) has notches (12) to increase the heat exchange surface with the open air .
2. Housse selon la revendication 1 dans laquelle les encoches sont des rainures (12) parallèles entre elles. 2. Cover according to claim 1 wherein the notches are grooves (12) parallel to each other.
3. Housse selon la revendication 2 dans laquelle les rainures ont une section trapézoïdale, la grande base étant alignée avec la face extérieure. 3. Cover according to claim 2 wherein the grooves have a trapezoidal section, the large base being aligned with the outer face.
4. Housse selon la revendication 1 dans laquelle la surface de la face extérieure (11) est supérieure au moins au double de la surface de la face intérieure (10) . 4. Cover according to claim 1 wherein the surface of the outer face (11) is greater than at least double the surface of the inner face (10).
5. Housse selon la revendication 1 dans laquelle la housse (1) a une épaisseur comprise entre 4 et 7 mm, et les encoches (12) ont une profondeur d'au moins la moitié de l'épaisseur. 5. Cover according to claim 1 wherein the cover (1) has a thickness between 4 and 7 mm, and the notches (12) have a depth of at least half the thickness.
6. Housse selon la revendication 1 dans laquelle l' élastomère en silicone a une dureté comprise entre 40 et 60 Shore A. 6. Cover according to claim 1 wherein the silicone elastomer has a hardness between 40 and 60 Shore A.
7. Housse selon la revendication 1, caractérisée en ce qu'elle est réalisée par moulage. 7. Cover according to claim 1, characterized in that it is produced by molding.
8. Housse selon la revendication 2 formée par un profilé ayant une section rectangulaire creuse, l'une des faces extérieures du profilé étant lisse et les trois faces extérieures étant rainurées . 8. Cover according to claim 2 formed by a profile having a hollow rectangular section, one of the outer faces of the profile being smooth and the three outer faces being grooved.
9. Housse selon la revendication 1, dans laquelle une paroi (32) de la housse se prolonge par un rabat (320) qui comporte une languette (321) , une autre paroi (31) comportant une fente (310) dans laquelle la languette (321) est introduite pour maintenir le rabat (320) dans une position rabattue. 9. Cover according to claim 1, wherein a wall (32) of the cover is extended by a flap (320) which has a tongue (321), another wall (31) having a slot (310) in which the tongue (321) is introduced to hold the flap (320) in a folded position.
10. Profilé pour former une housse selon la revendication 8, caractérisé en ce qu'il a une section rectangulaire creuse, l'une des faces extérieures du profilé étant lisse et les trois faces extérieures étant rainurées . 10. Profile for forming a cover according to claim 8, characterized in that it has a hollow rectangular section, one of the outer faces of the profile being smooth and the three outer faces being grooved.
PCT/FR2005/001019 2004-04-26 2005-04-25 Thermal protection jacket WO2005106314A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05762402A EP1743115A1 (en) 2004-04-26 2005-04-25 Thermal protection jacket

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0404362 2004-04-26
FR0404362A FR2869386B1 (en) 2004-04-26 2004-04-26 THERMAL PROTECTION COVER

Publications (1)

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WO2005106314A1 true WO2005106314A1 (en) 2005-11-10

Family

ID=34945444

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2005/001019 WO2005106314A1 (en) 2004-04-26 2005-04-25 Thermal protection jacket

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Country Link
EP (1) EP1743115A1 (en)
FR (1) FR2869386B1 (en)
WO (1) WO2005106314A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE710108C (en) * 1937-11-09 1941-09-04 Martin Fritzsche Insulation from two shell halves filled with insulating material for pipe elbows
DE1945785U (en) * 1965-11-18 1966-09-08 Otto Krebes SURFACE PLASTIC PROTECTION MAT FOR INSULATION.
US3422855A (en) * 1965-11-17 1969-01-21 Dow Corning High temperature fluid conduit
GB1184874A (en) * 1968-05-28 1970-03-18 Ph Thermal Prod Insulating Jackets for Cold Water Storage Cisterns
US5522433A (en) * 1993-05-28 1996-06-04 Nygaard; Noble A. Reusable insulation jacket for tubing, fittings and valves

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4100274C2 (en) 1991-01-07 1994-10-20 Biw Isolierstoffe Gmbh Process for producing an elongated profile part
US5598974A (en) 1995-01-13 1997-02-04 Nordson Corporation Reduced cavity module with interchangeable seat

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE710108C (en) * 1937-11-09 1941-09-04 Martin Fritzsche Insulation from two shell halves filled with insulating material for pipe elbows
US3422855A (en) * 1965-11-17 1969-01-21 Dow Corning High temperature fluid conduit
DE1945785U (en) * 1965-11-18 1966-09-08 Otto Krebes SURFACE PLASTIC PROTECTION MAT FOR INSULATION.
GB1184874A (en) * 1968-05-28 1970-03-18 Ph Thermal Prod Insulating Jackets for Cold Water Storage Cisterns
US5522433A (en) * 1993-05-28 1996-06-04 Nygaard; Noble A. Reusable insulation jacket for tubing, fittings and valves

Also Published As

Publication number Publication date
FR2869386B1 (en) 2006-06-30
EP1743115A1 (en) 2007-01-17
FR2869386A1 (en) 2005-10-28

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