Grate block for a combustion grate

Abstract

A grate block for a combustion grate including a block body having an upper wall which forms a bearing surface and along which the combustible material is to be conveyed and a front wall which has a lower bearing edge, the bearing edge being designed to come into contact with the bearing surface of an adjacent grate block in a feed direction, wherein the upper wall has an air supply opening formed by an air supply channel. The air supply opening is at least partially surrounded by a thickened portion which protrudes from the bearing surface, forms a protective channel extending the air supply channel, and is designed to prevent liquid from flowing into the air supply opening. A molded part for fastening to an upper wall of a block body of the grate block.

1 . A molded part for fastening to an upper wall of a block body of a grate block about an air supply opening which is configured in the upper wall and formed by an air supply duct extending through the upper wall,
 wherein the grate block is specified for a combustion grate and the block body is configured as a casting, wherein the upper wall forms a bearing face along which the incinerator charge is to be conveyed,   wherein the molded part, in the fastened state, forms a thickening that projects from the bearing face, surrounds the air supply opening, forms a protection duct, which extends the length of the air supply duct, and is specified for preventing liquid flowing into the air supply opening, and   wherein the protection duct is enclosed by an inner flank of the thickening and the thickening has an outer flank that adjoins the inner flank and runs in a descending manner on the side that faces away from the protection duct.   
     
     
         2 . The molded part as claimed in  claim 1 , wherein the cross section of the protection duct widens in the direction from the end of the protection duct that faces away from the bearing face to the bearing face. 
     
     
         3 . The molded part as claimed in  claim 2 , wherein the cross section of the protection duct widens continuously in the direction from the end of the protection duct that faces away from the bearing face to the bearing face. 
     
     
         4 . The molded part as claimed in  claim 1 , wherein the molded part has substantially a shape of a hollow truncated cone. 
     
     
         5 . The molded part as claimed in  claim 1 , wherein the molded part has an elliptical base area. 
     
     
         6 . The molded part as claimed in  claim 1 , further comprising a fastening means for mechanical fastening to the upper wall.