Patent ID: 7424855

Claim:
A slide arrangement for blocking or closing off a channel ( 16 ) adapted to be disposed between a coal pulverizer and coal dust burners, wherein the channel ( 16 ) is adapted to guide or convey a gas having a high proportion of coal dust ( 1 ), comprising: a housing ( 1 ) disposed in a wall of the channel ( 16 ); a shroud ( 2 ) or steel structure laterally connected to said housing ( 1 ); a slide plate( 3 ), wherein a passage ( 1 b ) is provided in a wall ( 1 a ) of said housing ( 1 ) that faces said shroud ( 2 ) or steel structure, wherein said passage ( 1 b ) is adapted to receive said slide plate ( 3 ); and a closure member ( 4 ), wherein said passage ( 1 b ) is closable by means of said closure member ( 4 ) with the exception of a narrow gap ( 4 c ), wherein said closure member ( 4 ) is provided with a circumferential seal ( 4 a ) that is adapted to rest against a side of said wall ( 1 a ) of said housing ( 1 ) that is remote from the channel ( 16 ), and wherein said closure member ( 4 ) is provided with a wear plate ( 4 b ) that in a closed state of said closure member ( 4 ) is flush with a side of said wall ( 1 a ) of said housing ( 1 ) that faces the channel ( 16 ) to form a smooth passageway at that location, wherein an elongated, self-supporting knee lever linkage ( 5 d, 5 d ) is provided, wherein said knee lever linkage is adapted to act upon said closure member ( 4 ) via externally disposed closure elements, and wherein said closure member ( 4 ) is held in said closed state by said closure elements, in which state it is adapted to remain by automatic holding.