Arch segment of a strand-guiding device

Abstract

An arch segment in an arch region of a strand-guiding device guides and deflects a cast strand made of metal into the horizontal after leaving a mold. The arch segment has an upper frame and a lower frame, on each of which a plurality of strand-guiding rollers are rotatably mounted. The upper frame and the lower frame are connected together such that the respective strand-guiding rollers thereof are arranged opposite one another in a mutually spaced manner and define an arch-shaped guide channel for guiding the cast strand. In order to reduce bulging of the cast strand in the arch region of the strand guide, at least one of the strand-guiding rollers on the upper frame and/or the lower frame is designed in the form of an axle roller.

1 .- 15 . (canceled) 
     
     
         16 . An arch segment ( 160 ) in an arch region of a strand-guiding device ( 150 ) for guiding and deflecting a cast strand ( 200 ) made of metal into a horizontal orientation after leaving a mold ( 140 ), comprising:
 a plurality of strand-guiding rollers ( 170 ) which are arranged opposite one another in a mutually spaced manner and define an arch-shaped guide channel for guiding the cast strand ( 200 );   an upper frame ( 162 ) on which upper ones of the plurality of strand-guiding rollers ( 170 ) are rotatably mounted; and   a lower frame ( 164 ) on which lower ones of the plurality of strand-guiding rollers ( 170 ) are rotatably mounted,   wherein the upper frame ( 162 ) and the lower frame ( 164 ) are connected together such that their respective oppositely arranged strand-guiding rollers ( 170 ) define the arch-shaped guide channel,   wherein at least one of the upper ones of the plurality of strand-guiding rollers ( 170 ) and at least one of the lower ones of the plurality of strand-guiding rollers ( 170 ) is a driven strand-guiding roller ( 170 ),   wherein the driven strand-guiding roller ( 170 ) is a driven journal roller,   wherein some of the upper ones of the plurality of strand-guiding rollers ( 170 ) and some of the lower ones of the plurality of strand-guiding rollers ( 170 ) are non-driven strand-guiding rollers ( 170 ),   wherein at least some of the non-driven strand-guiding rollers ( 170 ) are non-driven axle rollers with a fixed axle, and   wherein the driven journal rollers have a larger diameter than the non-driven axle rollers.   
     
     
         17 . The arch segment ( 160 ) according to  claim 16 ,
 wherein a radius of a casting arch (r) of the arch segment ( 160 ) is less than or equal to 7 m.   
     
     
         18 . The arch segment ( 160 ) according to  claim 16 ,
 wherein a clear spacing (d) between outer surfaces of one of the upper ones of the plurality of strand-guiding rollers ( 170 ) and one of the lower ones of the plurality of strand-guiding rollers ( 170 ), which are arranged opposite one another as a pair of rollers transverse to a casting direction (G), is less than or equal to 210 mm.   
     
     
         19 . The arch segment ( 160 ) according to  claim 16 ,
 wherein at least six of the strand-guiding rollers ( 170 ) are rotatably mounted on each the upper frame ( 162 ) and the lower frame ( 164 ).   
     
     
         20 . The arch segment ( 160 ) according to  claim 16 ,
 wherein the strand-guiding rollers ( 170 ) have a total barrel length transverse to a casting direction (G) of up to 2400 mm.   
     
     
         21 . A strand-guiding device ( 150 ) for guiding and deflecting a cast strand ( 200 ) made of metal into a horizontal orientation after leaving a mold ( 140 ), comprising:
 the arch segment ( 160 ) according to  claim 16 ; and   a cooling device for the strand-guiding rollers ( 170 ) of the arch segment ( 160 ).   
     
     
         22 . The strand-guiding device ( 150 ) according to  claim 21 , further comprising:
 a secondary cooling device for cooling the cast strand ( 200 ),   wherein nozzles of the secondary cooling device are designed and aligned to spray coolant not only onto the cast strand ( 200 ), but also onto the strand-guiding rollers ( 170 ).   
     
     
         23 . The strand-guiding device ( 150 ) according to  claim 22 ,
 wherein a clear spacing (a) between two strand-guiding rollers ( 170 ) adjacent in a casting direction (G) with at least one of the nozzles of the secondary cooling device arranged between them on a fixed side of the arch segment ( 160 ) is a maximum of 50 mm.   
     
     
         24 . The strand-guiding device ( 150 ) according to  claim 21 ,
 wherein no secondary cooling device is provided in the strand-guiding device ( 150 ); and   wherein the cooling device is designed for internal cooling of the driven strand-guiding roller ( 170 ) and/or the non-driven strand-guiding rollers ( 170 ).   
     
     
         25 . The strand-guiding device ( 150 ) according to  claim 23 ,
 wherein a clear spacing (a) between two strand-guiding rollers ( 170 ) adjacent in the casting direction (G) on a fixed side of the arch segment ( 160 ) is a maximum of 5 mm.   
     
     
         26 . A casting system in form of a vertical bending plant for producing a cast strand, comprising:
 a vertically aligned straight mold; and   the strand-guiding device ( 150 ) accordance with  claim 21  arranged downstream of the mold in,   wherein at least one vertical segment is arranged between the mold and the arch segment ( 160 ) for vertically transferring the cast strand ( 200 ) from the mold into the arch segment.   
     
     
         27 . A casting system in form of an arch system for producing a cast strand, comprising:
 a curved mold; and   the strand-guiding device ( 150 ) in accordance with  claim 20  arranged downstream of the mold.