JP2010532716A - Strand guide especially for steel slab continuous casting equipment - Google Patents

Abstract

  Having a plurality of segments (2), which support elements (6, 7) support two opposite faces (4, 5) of the strand (3), the support elements (6, 7) In order to guide the strand (3), it is arranged in the transport direction (F) in at least one lower frame (8) and at least one upper frame (9), both frames (8, 9) being In order to facilitate the exchange of a segment or part of a segment in a strand guide (1), in particular for a steel slab continuous casting device, which is arranged on at least one center bar (10), at least one lower frame ( 8) and / or at least one upper frame (9) relative to the at least one center bar (10) in the transfer direction (F) or the transfer direction (F Providing a displacement means to be displaced in the opposite direction (11) and.

Description

  The present invention comprises a plurality of segments, which support elements support two opposite faces of the strand by means of a support element, the support element being at least one lower frame in the transport direction for guiding the strands And a strand guide, in particular for a steel slab continuous casting device, in which at least one center bar is arranged in at least one upper frame.

  This type of strand guide is known, for example, from US Pat. The strand guide includes a plurality of segments that form a casting arc, the segments having opposing rows of guide rollers and rows of drive rollers. In this case, the roller is supported in the upper frame and the lower frame. These frames are disposed on the center bar (or side frame).

  Patent documents 2 to 6 show similar solutions.

  In the known solution, the attachment of the arc segment with the center bar guide to the strand guide and the removal from the strand guide becomes a problem. Segment removal and associated movement of the segment in the direction towards the center point of the casting arc (ie perpendicular to the segment axis or transfer direction) creates a collision problem with the adjacent segment. .

  This is especially true for casting machines with a small casting radius. Here, the segment can often only be removed by moving the segment upper frame in the direction of the dismantling size. This dismantling size is usually smaller than the maximum size to be cast. Therefore, it is difficult to remove the segment due to an operational failure during casting of the largest size.

German Patent Application Publication No. 198 24 366 German Patent Application Publication No. 1 965 115 German Patent No. 40 34 141 EP 0 879 106 EP 1 286 796 German Patent No. 26 20 888

  Therefore, the problem underlying the present invention is to form a segment guide of the type mentioned at the beginning so that the segment or part of the segment can be mounted and removed even when the casting radius is very small. is there.

  The solution to this problem according to the invention makes it possible to displace at least one lower frame and / or at least one upper frame relative to at least one center bar in the transfer direction or in the direction opposite to the transfer direction. Displacement means is provided.

  In this case, usually one center bar is arranged on each side of the segment.

  In this case, it is preferable that the displacement means has at least one actuator capable of moving one of the frames relative to the center bar in the transport direction. The actuator may be formed as a piston / cylinder unit acting on both sides. The actuator may have two piston cylinder units arranged on the center bar.

  The actuator may be formed as a hydraulic piston cylinder system, a pneumatic piston cylinder system, or a mechanical length adjustment element. In the last case, the actuator can comprise a threaded spindle system driven by an electric motor.

  It is advantageous if the support element is formed as a driven or non-driven roller that is rotatably mounted in the frame. The segments preferably constitute a casting arc. However, the segments can also be used for areas of the strand guide that extend vertically or horizontally.

  The center bar is to be understood here generally as a segmented lower frame structure formed to guide the upper frame. A plurality of side frame bars may be formed on one surface for each segment.

  With the proposal according to the invention, in particular, even in a casting machine with a small casting radius, the mounting and dismounting of the segments becomes essentially easier or only possible under certain operating conditions. The upper frame of the adjacent segment can be moved by the displacement means in order to remove the segment so that it is possible to remove the segment without any problems, i.e. without collision. That is, the movement of the upper frame of the adjacent segment allows the continuous cast segment to be mounted along its segment axis, i.e. perpendicular to the fixed side, without colliding with the adjacent segment.

  This becomes very advantageous especially in the case of arc segments.

  The present invention will be described in detail based on the embodiments shown in the drawings.

Fig. 2 schematically shows a casting arc of a strand guide of a continuous casting machine in a side view. 3 shows three adjacent segments of a casting arc in possible operating positions. Fig. 3 shows the three segments of Fig. 2 with one of the segments in the removal position.

  FIG. 1 shows a casting arc of a strand guide 1 of a continuous casting machine. As is known, the casting arc consists of a plurality of segments 2, which are arcuately formed on the casting strand (not shown here) for turning the casting strand from vertical to horizontal after the mold. They are positioned relative to each other so that a transition is obtained. Each segment 2 comprises two frames 8 and 9 as an important part, namely a lower frame 8 and an upper frame 9, to which support elements 6, 7 in the form of rollers are mounted. In this case, the rollers 6, 7 can be driven or non-driven, and the frames 8, 9 can comprise both types of rollers. Accordingly, a path in the transfer direction F of the cast strand is defined.

  The configuration of segment 2 according to one embodiment of the invention is illustrated in FIG. The segments making up the casting arc are indicated by 2 ', 2 ", 2'" and 2 "" (FIG. 3). The segment 2 used has a center bar guide. Each segment 2 ′, 2 ″, 2 ′ ″ has a center bar 10 on which a lower frame 8 (not shown in detail in FIGS. 2 and 3) is immovable on the T-shaped base portion of the center bar. Arranged and this lower frame supports a support element in the form of a roller 6 which supports one side 4 of the strand 3. Furthermore, an upper frame 9 is arranged on the center bar 10, which also supports a support element in the form of a roller 7 that guides the surface 5 of the strand 3.

  The adjustment of the rollers 6 and 7 relative to each other, i.e. the adjustment of the gap between the rollers 6 and 7, which remains for the strand 3, is effected by an adjustment cylinder 17, as is known.

  Regardless of the adjustment of the gap between the rollers 6 and 7 by the adjusting cylinder 17 which is performed in any case, the upper frame 9 is not fixedly disposed on the center bar 10 but is arranged in the transfer direction F. It is important that the upper frame 9 is arranged on the center bar 10 via the displacement means 11 so that the upper frame 9 can be moved relative to the center bar 10. The displacing means 11 comprises an actuator 12, which here has two pistons which allow the movement of the upper frame 9 relative to the center bar 10 in the transfer direction F or in the direction opposite to the transfer direction F. It consists of a cylinder unit. For this reason, a suitable slide guide is provided that allows the upper frame 9 to move stably relative to the center bar 10 by the actuator 12.

  The effect which can be achieved by this can be seen from the outline of FIGS. If the segment 2 is to be removed and the segment 2 '"on the right side of the example of FIG. is required.

  FIG. 2 shows the possible operating positions of the segment 2. Further, here, the removal space limit 13 is indicated by a one-dot chain line. As the right segment 2 '"is moved in the direction of the center point of the casting arc, it will collide with the upper frame of the middle segment 2" at the location indicated at 14.

  In order to avoid this, the measures shown in FIG. 3 are taken.

  The upper frame 9 of the segment 2 ″ shown in the middle is similar to the upper frame of the segment 2 ″ ″ shown to the right in FIG. Accordingly, the center axis 15 of the upper frame 9 moves away from the center axis 18 of the center bar 10. In FIG. This results in a corresponding clearance 16 in the region of the removal space limit 13. The same is done in the upper frame of the segment 2 "" that follows to the right of the segment 2 '"to be removed. Since this segment is moved in the transfer direction F, a corresponding clearance is provided for the other removal space. Also it occurs in the area of degree 19.

  The segment 2 '"illustrated on the right side of Fig. 3 can be removed from the strand guide in a direction towards the center point of the casting arc without colliding.

  Any system can be used for actuator adjustment. According to one form of the invention, a hydraulic piston-cylinder system is provided. However, it is also possible to use an electrical system, for example a threaded spindle or other mechanical gear unit or an electric motor, for driving it. Similarly, a pneumatic system is possible.

  That is, the present invention provides for the upper frame of the segment with a suitable adjustment element perpendicular to the segment axis (parallel to the fixed side), in particular to provide the necessary space for the installation or removal of the segment. Move.

  The formation of the actuator 12 by the two operating cylinders provided in the embodiment allows the upper frame 9 to be selectively moved to the right or left in the figure, depending on which segment is to be attached or removed. .

  FIG. 2 shows the possible operating positions of the device. It should also be mentioned that the displacement of the upper frame 9 can be used as a possible variable adjustment in casting, for example to allow movement from the aiming point.

  It is particularly preferred to use the proposal of the invention in the arc segment of continuous casting equipment for slabs and thin slabs.

DESCRIPTION OF SYMBOLS 1 Strand guide 2 Segment 2 'Segment 2 "Segment 2'" Segment 2 "" Segment 3 Strand 4 Strand surface 5 Strand surface 6 Support element (roller)
7 Support elements (rollers)
8 Lower frame 9 Upper frame 10 Center bar 11 Displacement means 12 Actuator 13 Removal space limit 14 Colliding location 15 Upper frame center axis 16 Clearance 17 Adjustment cylinder 18 Center bar center axis 19 Removal space limit F Transfer direction x Movement distance

Claims (11)

Having a plurality of segments (2), which support elements (6, 7) support two opposite faces (4, 5) of the strand (3), the support elements (6, 7) In order to guide the strand (3), it is arranged in the transport direction (F) in at least one lower frame (8) and at least one upper frame (9), both frames (8, 9) being In a strand guide (1), in particular for a steel slab continuous casting device, arranged on at least one center bar (10)
The at least one lower frame (8) and / or the at least one upper frame (9) relative to the at least one center bar (10) in a direction opposite to the transfer direction (F) or the transfer direction (F) The strand guide is characterized in that it is provided with a displacement means (11) that enables displacement.   2. Strand guide according to claim 1, characterized in that one center bar (10) is arranged on each side of the segment (2).   3. Strand guide according to claim 1 or 2, characterized in that the segment (2) constitutes a casting arc.   Displacement means (11) has at least one actuator (12) capable of moving one of the frames (8, 9) relative to the center bar (10) in the transfer direction (F). Item 4. The strand guide according to any one of Items 1 to 3.   5. Strand guide according to claim 4, characterized in that the actuator (12) is formed as a piston cylinder unit acting on both sides.   Strand guide according to claim 4, characterized in that the actuator (12) has two piston cylinder units arranged on the center bar (10).   7. Strand guide according to any one of claims 4 to 6, characterized in that the actuator (12) is formed as a hydraulic piston-cylinder system.   7. Strand guide according to any one of claims 4 to 6, characterized in that the actuator (12) is formed as a pneumatic piston-cylinder system.   7. A strand guide according to any one of claims 4 to 6, characterized in that the actuator (12) is formed as a mechanical length adjusting element.   10. Strand guide according to claim 9, characterized in that the actuator (12) comprises a threaded spindle system driven by an electric motor.   11. A support element according to claim 1, characterized in that the support element (6, 7) is formed as a driven or non-driven roller rotatably supported in the frame (8, 9). Strand guide described in one.

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