FR2564959A1 - MULTILAYER INSULATING BUILDING ELEMENT, IN PARTICULAR FOR COATING AN ELECTRIC HEATING OVEN - Google Patents

Abstract

ON A MULTI-LAYER INSULATING CONSTRUCTION ELEMENT FOR THE COATING OF AN OVEN IS PROVIDED AT LEAST ONE SUPPORT SECTION 13 ON WHICH A HEATING TAPE IS MOUNTED. TO ENSURE THE ANCHORING OF THE SUPPORT SECTION 13, A SUPPORT SLEEVE 10 IS SCREWED INTO A DRILLING 9 OF THE INSULATING CONSTRUCTION ELEMENT. ON THE SUPPORT SLEEVE 10, WE FIT THE SUPPORT SECTION 13 AND A HEAD 14. IN THE SUPPORT SLEEVE 10, WE ENGAGE AN ANCHORING ROD 20 WHICH IS SCREWED ON AN ANTAGONIST PART 17 ARRANGED ON THE FACE, LOCATED ON THE SIDE OPPOSED TO INTERNAL LAYER 1, OF THE INSULATING CONSTRUCTION ELEMENT.

Description

Multilayer insulating building element, in particular for the

  coating of a furnace with electric heating. The invention relates to a multilayer insulating building element for coating an electric heating furnace and in which, in front of its inner layer, at least one section is provided.

  support for mounting an electric heating element

  sorted, such as a ribbon or a heating filament.

  An insulating building element of this kind

  is described in German Patent Application P 33 14 760.4.

  Here, the support sections are arranged on stirrups suspended from a rod which is supported by anchoring retaining insulating building elements. The stirrups just apply to the element of

  insulating construction. They are not fixed on him.

  Stems and stirrups must be installed in the oven during assembly of building components

  insulators. This extends the assembly time.

  In order to be able to mount heating elements on the inside of the oven, special brackets are available between the insulating construction elements according to the state of the art. The consoles are expensive and, with regard to the resistance to chosthermics and the characteristics of insulation, are worse than insulating construction elements of ceramic fibers.

  It has been proposed to practice on blocks of

  garment made of fibrous material of the trunks in which

  they install a filament or a heating tape.

  These gullets tend to burst and are of

  expensive cation. Moreover, they reduce the

  electric heating elements placed in the

TER AL.

& 495-9

  The object of the invention is to provide an insulating construction element of the aforementioned type so that the support sections are anchored on the element of

construction itself.

  With an insulating construction element of the type

  mentioned at the beginning, this result is achieved according to

  vention by the fact that it comprises a support sleeve made of a refractory material and screwed into a bore which, starting from the indeformable inner layer

  fibrous ceramic material of the structural element

  insulation, extends only in part of the

  of the latter, that the support section and a head are arranged on the support sleeve and that an anchor rod, engaged in the support sleeve and secured inside thereof, is screwed on a antagonist piece, arranged on the face, located on the opposite side

  to the inner layer of the insulating building element.

  The support sleeve is doubly anchored in the insulating construction element. On the one hand, it is

  fixed by an external thread in the drilling of the

  insulating construction. On the other hand, he is subject to

  ti in the insulating building element by means of the

  anchor rod. This ensures that the sleeve

  The support itself can not detach from the insulating construction element even if the screw fixing of the support sleeve becomes dislocated during the operation of the oven. It is thus guaranteed that the heating element

  can not escape from the support section of the sleeve-

  support. The diameter of the anchor rod is substantially smaller than that of the support sleeve.

  practically not inside the building element.

  insulation and can be easily put in place.

  In a preferred embodiment of the invention,

  on the support sleeve is placed a spacer washer which is applied to the inner layer of

25649 S9

  the insulating building element. The support section is

  located between the spacer washer and the head. The long

  The spacer strip ensures that the heating tape is at a distance from the insulating building element. The invention will be better understood using the

  description of an embodiment taken as an example,

  but not limiting, and illustrated by the appended drawing, on l'eauel:

  FIG. 1a represents an element of construction

  insulating section seen in section; Figure lb is a view along the arrow Ib of Figure la;

  Figure 2 represents a small scale with

  port to the fiqure the several insulating construction elements combined with heating tape installed; Figure 3 is a section following III-III of

Figure 2.

  The insulating building element comprises an inner layer 1 preformed and dimensionally stable. This is made in the form of shell.Sa surface 2 is turned to the side of the interior of an oven to be coated with such insulating building elements. The inner layer 1

  is made of fibrous ceramic material.

  In the inner layer 1 in the form of shell are stacked several insulating layers, namely the insulating plates 3 and 4 and the insulating mats 5, 6 and 7. The insulating plates 3, 4 and the insulating mats 5, 6 and 7 are made in a fibrous ceramic material. The insulating plates 3 and 4 contain an organic binder which volatilizes at about 160 ° C., after which the insulating plates are

  dilate as a result of the internal tension of the ceramic fibers.

  mniques (superfelt plates). Insulating mats 5, 6 and 7 contain no binder (mat-non-woven). On the opposite side to surface 2, the construction element

  insulation comprises a plate 8 of mineral wool.

  A pergaQE 9 extends through the inner layer 1,

25649 59

  the insulating plates 3 and 4 and the insulating mat 5. It

  extends into the insulating mat 6.

  In the bore 9 is screwed a ceramic support sleeve 10 carrying a coarse thread Il. Spr thread 11 is screwed or threaded a washer spread-

  12 which is applied on the surface 2. The sleeve

  support 10 protrudes out of the surface 2 by a

  support section 13 which is limited by a head 14.

  At its end opposite the head 14, the support sleeve 10 encloses a glue 15. After screwing the support sleeve 10, a needle is inserted inside the latter, not shown in detail. With this one pierces the insulating mat 6 partially, the insulating mat 7 and the mineral wool plate 8. In the

  channel 16 thus constituted and whose diameter is sensi-

  slightly smaller than the outside diameter of the sleeve-

  support 10, a washer nut 17 is engaged from the side of the mineral wool plate 8. This nut presents

  a washer 18 and a threaded bush 19.

  In the support sleeve 10, an anchoring rod 20 is slipped into the channel 16. The anchoring rod 20 is applied by its head 20 'against the collar 15

  and screwed into the threaded socket 19. The sleeve

  support 10 is thus fixed on the element of con-

  insulating truction. This attachment remains maintained even when the inner layer 1 or the insulating plates 3

  and 4 are sufficiently worn to cause an enlargement

  piercing 9. If it is to be feared that this

  If drilling 9 causes the support sleeves 10 to tilt downwards, the insulating plate 3 can then be replaced by an insulating plate made of a harder material, for example a silicone silicate plate.

  calcium or a refractory lightweight brick plate.

  The insulating construction element comprises several of the sleevesupplied 10 which have just been described. In the exemplary embodiment according to FIG.

  three support sleeves 10 are provided per insulating element.

  On their support sections 13 is applied a heating tape.

  21. The latter, because of the spacer washer 12, is maintained at a distance from the surface 2 (see FIG. 3). The heating tape 21 is arranged in the form of meanders, the support 13 placed at the top and returning down the heating tape 21 and sockets 10 'similar to the support sleeves 10,

  placed at the bottom, pointing upward the heating tape 21.

  To prevent contact between the meanders of the heating tape

  fant 21, for example as a result of magnetic fields getting

  forming, one can have between them

  22 which are screwed into the inner layer

  1 and insulating plates 3 and 4. In the lower sleeves

  10 'and the spacer pins 22, it is possible to

  primer anchor rod 20, since these elements

  not to support the weight of the heating tape 21.

  Each insulating building element is mounted on two anchoring members 23 which are fixed on the wall of an oven. The anchoring members 23 comprise spikes

  23 'that bite into insulating building elements.

  To prevent the anchoring members 23 from bending under the weight of the insulating construction elements carrying the heating tape 21, the angular anchoring members

  23 are provided with a reinforcing plate 23 ".

  Many other examples of embodiments may be envisaged within the scope of the invention. So, for example, instead of washers 18, it is possible

  to provide a bar of expanded metal or a held metal-

  It extends over the entire width of the insulating construction element and serves to fix the threaded bushings 19. In such a case, it suffices that the threaded bushings 19 are provided with small flanges by

  ratio to the diameter of the washers 18.

Claims (7)

  A multilayer insulating building element for coating an electrically heated furnace and in which, in front of its inner layer, at least one support section is provided for mounting an electric heating element, such as a ribbon or a heating filament, characterized in that it comprises a support sleeve (10) made of a refractory material and screwed into a bore (9) which, starting from the inner layer (1) dimensionally stable ceramic material fibrous element of the insulating construction element, extends only in part of the depth thereof, that the section   support (13) and a head (14) are arranged on the sleeve   support (10) and that an anchor rod (20), engaged in the support sleeve (10) and secured within the   the latter is screwed onto an opposing part (17).   placed on the opposite side of the layer   internal part (1) of the insulating construction element.   2. Insulating building element according to revendicaticn 1, characterized in that on the support sleeve (10) is placeda spacer washer   (12) which is applied to the inner layer (1).   3. Insulating building element according to claim 1 or 2, characterized in that the   support sleeve (10) is ceramic.   4. Insulating building element according to one   any of the preceding claims, characterized   in that the counterpart is formed by a nut with washer (17).   5. Construction element according to one   one of claims 1 to 3, characterized in that   that the counterpart is formed by a bar of expanded metal or a metal fabric on which threaded bushings (19) are secured for the rod anchor (20). 6 4 959   6. Insulating ronstructiorn element according to one   any of the preceding claims, characterized   in that the diameter of the anchor rod (20)   is smaller than the outside diameter of the sleeve-   support (10). 7. insulating construction element salt = one   any of the preceding claims3 characterized   in that in the inner inner shell (t) are inserted several insulating plates (3, 4) and several insulating mats (56, 7) and that the bore (9) and the support sleeve (l3) are staggered) some of these insulating plates and insulating mats.