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 comprises retaining devices for fastening intermediate-area spray bars. A billet guide and a continuous billet casting machine having such a roller stand.

Claims

1-7. (canceled)

8. 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; wherein the roller stand comprises retaining devices for fastening intermediate-area spray bars.

9. The roller stand as claimed in claim 8, further comprising at least one conduit adapted to introduce spray cooling liquid into intermediate-area spray bars.

10. The roller stand as claimed in claim 9, wherein the at least one conduit for introducing spray cooling liquid into the intermediate-area spray bars is integrated in the carrier frame.

11. The roller stand as claimed in claim 9, wherein a conduit rack comprising the at least one conduit for introducing spray cooling liquid into the intermediate-area spray bars is fastened on the carrier frame.

12. The roller stand as claimed in claim 11, wherein the conduit rack comprises further retaining devices for fastening intermediate-area spray bars.

13. A strand guide of a secondary cooling chamber for a continuous billet casting machine, comprising at least one roller stand as claimed in claim 7.

14. A continuous billet casting machine, comprising a strand guide of a secondary cooling chamber as claimed in claim 13.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The invention is explained by means of schematic exemplary illustrations of embodiments.

[0026] FIG. 1 shows schematically the general diagram of a conventional continuous billet casting machine with curved guidance and a secondary cooling chamber.

[0027] FIG. 2 shows a roller stand according to the invention.

[0028] FIG. 3 shows a detail of a secondary cooling chamber having a roller stand according to the invention.

DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Cones 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. 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.

[0033] 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

[0034] 1 continuous billet casting machine [0035] 2 metal strand [0036] 3 strand guide [0037] 4 mold [0038] 5 secondary cooling chamber [0039] 6 WSU [0040] 7 roller table [0041] 8 roller stand [0042] 9 carrier frame [0043] 10 supporting rollers [0044] 11a, 11b cooling bars [0045] 12 stand [0046] 13 roller stand [0047] 14 lower supporting roller [0048] 15 upper supporting roller [0049] 16a, 16b carrier frame part [0050] 17a, 17b rockers [0051] 18a, 18b, 18c, 18d, 18e, [0052] 18f, 18g, 18h retaining device [0053] 19 feed point [0054] 20a, 20b connection point [0055] 21 cooling liquid connection [0056] 22 roller stand [0057] 23 intermediate-area spray bar [0058] 24 intermediate-area spray bar [0059] 25 intermediate-area spray bar [0060] 26 intermediate-area spray bar [0061] 27 intermediate-area spray bar [0062] 28 intermediate-area spray bar [0063] 29a, 29b, 29c, 29d retaining device [0064] 30a, 30b carrier frame part [0065] 31a, 31b hose [0066] 32a, 32b connection point [0067] 33 spray nozzle