Pipe refractory insulation for furnaces

F - Mech Eng,Light,Heat,Weapons – 27 – D

Patent

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Details

F27D 3/02 (2006.01) F27D 1/04 (2006.01)

Patent

CA 2308420

Water-cooled pipes (16, 18) of the type utilized to support steel workpieces in reheat furnaces and the like are insulated by preformed, rigid refractory members (30). Threaded studs (40) are welded to opposing surfaces of the pipe (16, 18) or the web (20) between a pair of pipes. The pipe(s) are then covered by a ceramic fiber blanket (44). A pair of the refractory members, each of which contains an aperture (46) through which one of the studs is received, is positioned so as to cover the pipes) and blanket. Nuts (50) are fastened to the studs to hold the refractory members in place. The refractory members are sized and positioned so that gaps exist between them so as to allow for thermal expansion. These gaps may be filled with blanket insulation or heat-resistant plastic. The remaining portions of the apertures are also filled with heat resistant plastic.

L'invention concerne des conduits (16, 18) refroidis par de l'eau, du type de ceux utilisés pour soutenir des pièces d'acier dans des fours de réchauffe et analogues, isolés par des éléments (30) réfractaires rigides préformés. Des goujons (40) filetés sont soudés sur les surfaces opposées du conduit (16, 18) ou de la bande (20) située entre lesdits conduits. Le(s) conduit(s) sont ensuite recouverts d'une couverture (44) de fibre en céramique. Une paire d'éléments réfractaires, chacun étant pourvu d'une ouverture (46) de réception de goujon, est disposée de manière à recouvrir le(s) conduit(s) et la couverture. Des écrous (50) sont fixés aux goujons, afin de maintenir les éléments réfractaires en place. Ces éléments réfractaires sont dimensionnés et placés, de sorte qu'il existe des espaces entre eux permettant une expansion thermique. Ces espaces peuvent remplis d'une couverture isolante ou d'un plastique thermo-résistant. Les parties restantes des ouvertures sont également remplies de plastique thermo-résistant.

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