Fire grate, in particular for waste incinerators

Details Fire grate, in particular for waste incinerators Fire grate, in particular for waste incinerators

F - Mech Eng,Light,Heat,Weapons

23

H

F23H 3/00 (2006.01) F23H 1/00 (2006.01) F23H 17/00 (2006.01)

Patent

CA 2197741

A fire grate has tensioning devices (3) inserted in recesses (2) of an oven wall (1), with each device acting upon one grate side plate. The tensioning device (3) includes a cylinder (4) inserted into the oven wall, a hollow piston (7) guided therein and a spring (26), which can be adjusted in its tension. The grate side plate has a carrying plate (12) directly fastened to the piston bottom (10) with a grate border plate (13) suspended, or hanging, on the carrying plate (12). The piston (7) has diameter and length dimensions such that it can support and guide the grate side plate without further guiding devices. Neighboring pistons (7) are connected flexibly to each other by guiding bars (36), so that the pistons (7) can influence each other reciprocally. An upper edge of the grate side plate, particularly the grate border plate (13), has a flange (17) extending toward the oven wall. The flange (17) sealingly engages an elastical seal (19), fastened onto the oven wall. An additional covering ledge (21) covers the flange (17) and includes a shaped part or angle (22) which bounds a hollow space (23) between these two parts, just like a labyrinth seal.

Grille munie de dispositifs tendeurs (3) insérés dans des logements (2) d'une paroi de four (1), chaque dispositif agissant sur une plaque latérale de la grille. Le dispositif tendeur (3) comprend un cylindre (4) inséré dans la paroi du four, un piston creux (7) guidé à l'intérieur de la paroi du four, et un ressort (26) de tension réglable. La plaque latérale de la grille comporte une plaque de transport (12) fixée directement sur le dessous du piston (10) au moyen d'une plaque de bordure de la grille (13) suspendue à la plaque de transport (12). Le diamètre et la longueur du piston (7) font que ledit piston peut supporter et guider la plaque latérale de la grille sans autres dispositifs de guidage. Les pistons voisins (7) sont reliés de manière souple les uns aux autres par des barres de guidage (36), de sorte que les pistons (7) peuvent avoir un effet les uns sur les autres. Un bord supérieur de la plaque latérale de la grille, en particulier la plaque de bordure de la grille (13), comporte un rebord (17) se prolongeant en direction de la paroi du four. Le rebord (17) s'engage dans un joint d'étanchéité élastique (19) fixé à la paroi du four. Une pièce d'appui supplémentaire (21) couvre le rebord (17) et comprend une partie ou un angle formé (22), qui borne un espace creux (23) entre ces deux parties, comme un joint à labyrinthe.

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