Roller stand having retaining devices for fastening intermediate-area spray bars

Abstract

A roller stand for a billet guide of a continuous billet casting machine, having a carrying frame for mounting at least one lower supporting roller, wherein the roller stand includes retaining devices for fastening intermediate-area spray bars. A billet guide and a continuous billet casting machine having such a roller stand.

Claims

1. A roller stand for a strand guide of a continuous billet casting machine, comprising: a carrier frame for mounting at least one lower supporting roller; and at least one conduit configured to introduce spray cooling liquid into intermediate-area spray bars; wherein the roller stand comprises retaining devices configured to fasten intermediate-area spray bars; and wherein the at least one conduit configured to introduce spray cooling liquid into the intermediate-area spray bars is integrated in the carrier frame.

2. The roller stand as claimed in claim 1, wherein a conduit rack comprising the at least one conduit configured to introduce spray cooling liquid into the intermediate-area spray bars is fastened on the carrier frame.

3. The roller stand as claimed in claim 2, wherein the conduit rack comprises further retaining devices for fastening the intermediate-area spray bars.

4. The roller stand as claimed in claim 1, further comprising a hose coupling the at least one conduit and the intermediate-area spray bars and configured to introduce the spray cooling liquid into the intermediate-area spray bars.

5. The roller stand as claimed in claim 1, wherein: the carrier frame comprises two carrier frame parts; and an upper supporting roller is mounted on the carrier frame by at least one rocker.

6. The roller stand as claimed in claim 5, wherein the two carrier frame parts are arranged to face each other and extend in a direction perpendicular to an extending direction of the strand guide.

7. The roller stand as claimed in claim 5, wherein: the at least one rocker comprises two rockers; the lower supporting roller is mounted on one of the carrier frame parts; and the upper supporting roller is mounted on the other of the carrier frame parts by the two rockers.

8. A strand guide of a secondary cooling chamber for a continuous billet casting machine, comprising at least one roller stand as claimed in claim 1.

9. A continuous billet casting machine, comprising the strand guide of the secondary cooling chamber as claimed in claim 8.

10. A roller stand for a strand guide of a continuous billet casting machine, comprising: a carrier frame for mounting at least one lower supporting roller; and at least one conduit configured to introduce spray cooling liquid into intermediate-area spray bars; wherein the roller stand comprises retaining devices configured to fasten intermediate-area spray bars; wherein the at least one conduit configured to introduce spray cooling liquid into the intermediate-area spray bars is integrated in the carrier frame; and wherein the carrier frame comprises hollow components configured to convey the spray cooling liquid to connection points for the intermediate-area spray bars.

11. A roller stand for a strand guide of a continuous billet casting machine, comprising: a carrier frame for mounting at least one lower supporting roller; and at least one conduit configured to introduce spray cooling liquid into intermediate-area spray bars; wherein the roller stand comprises retaining devices configured to fasten intermediate-area spray bars; wherein the at least one conduit configured to introduce spray cooling liquid into the intermediate-area spray bars is integrated in the carrier frame; and wherein the retaining devices for fastening the intermediate-area spray bars are provided on the carrier frame.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is explained by means of schematic exemplary illustrations of embodiments.

(2) FIG. 1 shows schematically the general diagram of a conventional continuous billet casting machine with curved guidance and a secondary cooling chamber.

(3) FIG. 2 shows a roller stand according to the invention.

(4) FIG. 3 shows a detail of a secondary cooling chamber having a roller stand according to the invention.

DETAILED DESCRIPTION

(5) FIG. 1 shows schematically in oblique view how in a continuous billet casting machine 1 a metal strand 2, for example a steel strand, is guided in a strand guide 3 in an arc from the mold 4 via secondary cooling chamber 5 and WSU 6 to the roller table 7. Supporting rollers 10 mounted in roller stands 8 in carrier frames 9 support and guide it in the process, practically forming a strand guide channel. Cooling bars 11a and 11b are illustrated on racks 12 above and below the metal strand; schematically illustrated are intermediate-area spray bars, which allow cooling of the metal strand in the intermediate areas, i.e. the areas of the strand guide of a secondary cooling chamber where the metal strand does not pass through any roller stands. The spraying of spray cooling liquid from cooling nozzles to cool the metal strand is illustrated schematically. Cooling bars and cooling nozzles arranged next to the metal strand on the right- and left-hand sides along the metal strand as seen from the mold to the roller table are not illustrated for the sake of greater clarity.

(6) FIG. 2 shows a roller stand 13 according to the invention for a strand guide of a continuous billet casting machine, having a carrier frame for mounting a lower supporting roller 14 and an upper supporting roller 15. The lower supporting roller 14 is mounted on carrier frame part 16a, and rockers 17a, 17b carrying the upper supporting roller 15 are mounted on carrier frame part 16b. A plurality of retaining devices 18a, 18b, 18c, 18d, 18e, 18f, 18g, 18h for fastening intermediate-area spray bars is provided on both carrier frame part 16a and carrier frame part 16b. The roller stand also comprises a conduit suitable for introducing spray cooling liquid into intermediate-area spray bars; this conduit is integrated in carrier frame part 16b. A feed point 19 and two connection points 20a, 20b for indirect connection of intermediate-area spray bars via hoses can be seen; the spray cooling liquid flows to the connection points through a cavity in carrier frame part 16b. Carrier frame part 16a can be supplied with cooling liquid for cooling carrier frame part 16a via the cooling liquid connection 21.

(7) FIG. 3 shows a detail of a secondary cooling chamber having a roller stand 22 according to FIG. 2. Intermediate-area spray bars 23,24,25,26,27,28 are fastened on the roller stand 22 according to the invention, for example on the retaining devices 29a,29b,29c,29d visible in FIG. 3 on the carrier frame parts 30a and 30b. Other retaining devices that are present are not visible in FIG. 3. The figure illustrates how spray cooling liquid is conveyed to the intermediate-area spray bars 26 and 27 from connection points 32a, 32b via hoses 31a, 31b.

(8) Cones 34 are used to indicate how spray cooling liquid is sprayed from spray nozzles 33 positioned symmetrically with respect to the center of the strand guide, i.e. with respect to the centerline of the strand guide channel. Spray nozzles 33 positioned on intermediate spray bars 27 and 28 are viewed from behind and therefore are represented as small circles, and cones 34 of spray cooling liquid emanating from these spray nozzles 33 are illustrated as large circles. Since the intermediate-area spray bars are fastened on the carrier frame and also extend into the space between the two carrier frame parts 30a and 30b, it is also possible according to the advantageous embodiment illustrated to cool between the carrier frame parts 30a and 30b in the region of the roller stand.

(9) Although the invention has been illustrated and described more specifically in detail by means of the preferred illustrative embodiments, the invention is not restricted by the examples disclosed, and other variations can be derived therefrom by a person skilled in the art without exceeding the scope of protection of the invention.

LIST OF REFERENCE SIGNS

(10) 1 continuous billet casting machine 2 metal strand 3 strand guide 4 mold 5 secondary cooling chamber 6 WSU 7 roller table 8 roller stand 9 carrier frame 10 supporting rollers 11a, 11b cooling bars 12 racks 13 roller stand 14 lower supporting roller 15 upper supporting roller 16a, 16b carrier frame part 17a, 17b rockers 18a, 18b, 18c, 18d, 18e, 18f, 18g, 18h retaining device 19 feed point 20a, 20b connection point 21 cooling liquid connection 22 roller stand 23 intermediate-area spray bar 24 intermediate-area spray bar 25 intermediate-area spray bar 26 intermediate-area spray bar 27 intermediate-area spray bar 28 intermediate-area spray bar 29a, 29b, 29c, 29d retaining device 30a, 30b carrier frame part 31a, 31b hose 32a, 32b connection point 33 spray nozzle