EP2560775B1 - Modular supporting frame - Google Patents

Description

Field of the invention

The invention relates to an assembly for a plant for casting and / or bending a metal strand, in particular a Bogengießanlage, which comprises segment carrier of a support frame and corresponding segments with a roller assembly. Furthermore, the invention comprises a corresponding system.

State of the art

Various support frame constructions for continuous casting plants are known from the prior art, which are usually connected to a foundation. Furthermore, several segments are installed on these support frames or support frame parts, which in turn comprise a plurality of rollers or roller pairs between which a strand is passed. As a rule, the support frame consists of two to four support frame parts or segment supports, several segments being mounted on each part of the support frame.

The layout DE 24 57 302 shows, for example, such a casting plant, which schematically in FIG. 1 is shown. This Bogengießanlage 1 ', has a support frame 2', which is formed in two parts in the region of the bend, wherein on each of the two Tragrahmenteile 3 'each three to four segments 4' or support segments 4 'together with rollers 5' are arranged. A disadvantage of such an arrangement is that during operation of the system, the so-called "pass line" between the last seen in the casting direction last segment 4 'of the first support frame part 3' and the first segment 4 'in the casting direction Tragrahmenteils 3 'may result in a jump due to bending under the load and thermal expansion. This leads to a poorer quality of the cast and bent strand. To counteract this, although a significantly greater cost of materials could be operated in order to carry out the segment carrier correspondingly strong, but this is uneconomical. At best, time-consuming and complicated adjustments are necessary.

In order to at least partially avoid this problem, there are other known types of installations in which the support frame is formed, for example, in two parts and the two adjacent parts of the support frame are connected by a segment, for example by attaching a segment with a bolt connection both to the first support frame part is and is connected to other bolts with the adjacent support frame part, whereby the segment forms a bridge element or segment between the two parts of the support frame. Jumping changes in the "pass line" can thus often be avoided. A disadvantage of this embodiment, however, is that the support frame can expand undefined under the influence of heat. In particular, the known fixed / floating bearing principle is repealed by such a construction. For a brief definition of the term is under the fixed / floating bearing principle in this application to be understood that in a fixed / floating bearings on the one hand parts of the system are fixed, so that, for example, the radius of the pouring bow can not change, however, on the other hand parts of the support frame or the segments can move along and transversely to the casting direction, that is, can move when thermally expanded, whereby damage is avoided by these. This is no longer possible in the type of plant just described by the bridge segment. Possible consequences are cracks in the foundation of the supporting frame or problems with the installation or removal of the segments due to clamping bolt connections.

Both variants described also bring with it the problem that the individual support frame parts are very large, since several segments are mounted on them. Thus, the corresponding support frame lengths of about eight to twelve meters, resulting in a correspondingly high weight results. This results in increased procurement, transport and assembly costs. In addition, large and expensive processing machines are needed for the difficult to obtain due to their size blanks.

Furthermore, in the prior art, on the one hand, compliance with the pass line and, on the other hand, the correct functioning of the system under the influence of heat contradict one another.

The Laid-open specification DE 25 24 675 A discloses a continuous casting plant in which lower support rolls for guiding and supporting a metal strand on fixed bearing blocks and upper support rolls are mounted in movable support blocks. The support blocks can be lifted off the slab with the aid of hydraulic cylinders.

The technical task, which results from the prior art is to enable a more efficient casting or at least to solve one of the above-mentioned disadvantages.

Disclosure of the invention

The technical problem is solved by the inventive system according to claim 1. The inventive system overcomes several disadvantages of the prior art. The fact that the segment carriers are designed such that they carry only one segment or support segment, they are designed significantly lighter than the segment carrier from the prior art. Material procurement, production, transport and assembly are facilitated. Furthermore, it is possible with the proposed module The segment carriers or support frame modules are even easier to carry out, since the stiffness of a single segment now also contributes to the overall rigidity or strength of the segment carriers in the casting direction. In the prior art, the stiffness or the inherent rigidity of the segments could not contribute to the stability or rigidity of the segment carrier in the casting direction. Furthermore, the pass line can be maintained with the solution according to the invention, since the segment carriers seen in the casting direction can be formed comparatively short by carrying only one segment; this virtually eliminates the bending of the segment carriers and their influence on the pass line.

Casting breaks are avoided. In addition, the segment carriers according to the invention are easier to adjust due to their smaller size.

Due to the pivotable connection, the segment carriers can be adapted particularly easily to different casting radii or used for systems with different casting radii. Possibly desired adjustments are facilitated.

The fact that a following segment is stored on the fixed in the foundation predecessor segment, the compliance with the pass-line is facilitated. It is made possible by the floating, the thermal expansion along and across the casting direction.

In a further preferred embodiment of the system, at least one of the segment carriers comprises at least four support points for connection to one of the segments.

In a further preferred embodiment of the system, a first support points for fixed storage, a second support point to a displaceable mounting transversely to the casting direction and the remaining support points are formed to a displaceable mounting in all directions. In all directions, in particular in all directions, which lie in a plane which is spanned by the casting direction and the direction transverse to the casting direction. This type of storage of the segments on the segment carriers allows a even better compliance with the Pass Line and allows simultaneous thermal expansion.

In a further preferred embodiment of the system, the segment carriers seen in the casting direction have substantially the same length as the respective segments carried by them. Substantially equal length of segment carrier and segment increases the rigidity of the system of these two elements.

In a further preferred embodiment of the system, at least two, preferably at least three, segment carriers are formed equivalently. The fact that a number of segment carriers have the same structure, manufacturing costs can be reduced. This modularization also increases the variability of a system designed from such segment carriers or assemblies. In particular, the same parts can be used for repair, whereby the number of stored spare parts can be reduced. Although the two see in FIG. 1 schematically shown frame parts at first glance, but they are constructed differently in reality. Furthermore, the in FIG. 1 shown bent frame parts are not used in a vertical or horizontal section of a casting or bending plant. In such sections, according to the prior art, supporting frame parts having a different shape, in particular a different curvature, are necessary, so that many different types of supporting frame parts are present within a plant according to the prior art.

In a further preferred embodiment of the system, each segment carrier, viewed in the casting direction, is supported at only one point on the foundation.

In a further preferred embodiment of the system, at least one of the segment carriers is essentially formed by two longitudinal members which extend preferably extend on both sides of the strand in the casting direction and which are transverse to the casting direction, preferably by cross-struts, interconnected. Such a construction has both a high rigidity and a relatively low weight.

In a further preferred embodiment of the system, each of the longitudinal beams comprises at one of its ends in the casting direction a connecting means and at its other end a region whose shape is substantially complementary to that of the connecting means, so that two successively arranged in the casting direction segment carrier by means of a Connection means of a first segment carrier can be connected to the complementary region of a second segment carrier. This advantageous embodiment of the assembly according to the invention, the function of the assembly is further improved. In particular, the pass line is better adhered to and retained the ability to expand when exposed to heat.

In a further preferred embodiment of the system, the connecting means is formed by a clevis. This connection means allows a particularly simple and secure connection of adjacent segment carrier.

In a further preferred embodiment of the plant, this is designed such that the metal strand can be bent from a substantially vertical position into a substantially horizontal position. Furthermore, the system according to this embodiment comprises between five and nine juxtaposed and interconnected segment carrier for bending the strand in the horizontal position.

Brief description of the figures

Figur 1

einen schematischen Längsschnitt durch eine Bogengießanlage gemäß dem Stand der Technik;

Figur 2

einen schematischen Längsschnitt durch einen Tragrahmen gemäß einem erfindungsgemäßen Ausführungsbeispiel; und

Figur 3

eine schematische perspektivische Ansicht eines Segmentträgers einer erfindungsgemäßen Baugruppe.

The figures are briefly described below. Further details can be found in the detailed description of the embodiments. Show it:

FIG. 1

a schematic longitudinal section through a Bogengießanlage according to the prior art;

FIG. 2

a schematic longitudinal section through a support frame according to an embodiment of the invention; and

FIG. 3

a schematic perspective view of a segment carrier of an assembly according to the invention.

Detailed description of the embodiments

FIG. 2 shows a support frame 2, which is connectable in points 11 with a foundation. The support frame 2 consists of several segment carriers 3. The segments which are supported by the segment carrier 3 are in the FIG. 2 not shown. The segments or support segments are formed as usual and to those skilled in the art, for example, substantially as the segments 4 'of FIG. 1 , The exact shape of the segments and the arrangement of the rollers within the segments are not in the focus of the invention. According to the invention, in each case one segment can be connected to a segment carrier 3. In other words, a segment is in each case supported by a segment carrier 3. The segments are preferably fastened by bolts 12 to the individual segment carriers 3. However, the invention includes not only an entire system, but individual modules can each be combined consisting of segment carriers 3 or modules 3 and a segment to a support frame 2 a plant. It is also possible that existing systems are extended by such assemblies or that existing support frame parts are replaced by an assembly. It is possible in particular, the complete To design plant only with three or two types of carrier segment. By equivalent types of carrier segments or modules, the elements can also be used subsequently for other casting radii, which is not possible with larger, specific frame parts. According to the invention, between five and nine segment carriers 3 are preferably used for the deflection of a strand from the vertical direction into the horizontal direction. In the horizontal part of the system further segment carrier 3 may be arranged.

FIG. 3 shows by way of example the detailed structure of a segment carrier 3. Preferably, a segment carrier 3 is formed by two longitudinal members 6, which extend in the casting direction. These longitudinal members 6 are preferably rigidly connected by connecting elements 7, in particular by struts, transversely to the casting direction. Furthermore, the segment carrier 3 comprises the FIG. 3 four support points 10 on which a segment can be worn and stored together with its roller assembly. By bolt 12, the segment can be connected to the segment carrier 3 and secured on this. In this case, a first support point 10 is preferably designed for fixed storage, a second support point 10 is formed to a displaceable transversely to the casting direction storage and formed the remaining support points to a displaceable in all directions storage. How such types of bearings are formed per se is known to the person skilled in the art. In addition, the segment carrier 3 in the casting direction is preferably of the same length as the segment to be supported. Preferably, segment carrier 3 and the respective segment are connected to each other substantially at their corners. Furthermore, the segment carrier 3 preferably comprises a clevis 8 for connection to an adjacent segment carrier 3. In addition, the segment carrier 3 comprises at an opposite end a region 9 which is substantially complementary to the clevis 8 and with a clevis 8 of an adjacent carrier segment 3 is connectable. Instead of the clevis 8 but other forms of connecting means 8 are conceivable. Furthermore, the segment carrier 3 is preferably fixed but rotatable with connected to the foundation. This type of storage is shown by the foundation bearing 11. At this point it should be made clear that the individual in the FIG. 3 shown features may not be construed as limiting, but merely represent an example of the formation of a segment carrier 3 according to the invention.

The features of the individual embodiments mentioned in the preceding description as well as the features which can be seen in the figures can be adapted by a person skilled in the art, with the aid of his specialist knowledge, to the requirements and conditions which are present in practice. In addition, features of the description can be combined with each other or even exchanged with each other.

LIST OF REFERENCE NUMBERS

1':

Bogengießanlage

2:

supporting frame

2 ':

supporting frame

3:

segment carrier

3 ':

segment carrier

4 ':

segment

5 ':

roll

6:

longitudinal beams

7:

Connecting element / strut

8th:

Lanyard / clevis

9:

Complementary area to the clevis / connector

10:

support point

11:

storage foundation

12:

bolt

Claims (10)

1. A plant for casting and/or bending a metal strip, particularly a curved casting plant, comprising a carrier frame (2) and a subassembly, which in turn comprises the following:

   at least two supporting segment carriers (3) which form a part of the carrier frame (2) of the plant; and

   supporting segments which are connectible with the supporting segment carriers (3) and which each comprise a roller arrangement for guidance of the metal strip,

   wherein the supporting segment carriers (3) are so constructed that they each carry exactly one of the supporting segments,

   characterised in that the subassembly

   comprises at least two supporting segment carriers (3), which are mutually adjoining in casting direction and which are pivotably interconnected, and

   a foundation, wherein the supporting segment carriers (3) are respectively fixedly mounted (11), preferably rotatably, at the foundation.
2. Plant according to claim 1, wherein at least one of the supporting segment carriers (3) comprises at least four support points (10) for connection with one of the supporting segments.
3. Plant according to claim 2, wherein a first one of the support points (10) is constructed for fixed mounting, a second support point (10) is constructed for mounting to be displaceable transversely to the casting direction and the remaining support points (10) are constructed for a mounting displaceable in all directions.
4. Plant according to any one of the preceding claims, wherein each individual supporting segment carrier (3) has, as seen in casting direction, substantially the same length as the supporting segment carried by it.
5. Plant according to any one of the preceding claims, wherein at least two, preferably at least three, of the supporting segment carriers (3) have equivalent construction.
6. Plant according to any one of the preceding claims, wherein each supporting segment carrier (3) as seen in casting direction is mounted on the foundation merely at one point (11).
7. Plant according to any one of the preceding claims, wherein at least one of the supporting segment carriers (3) is formed substantially by two longitudinal girders (6) which extend preferably on both longitudinal sides of the strip in casting direction and which are connected together by connecting elements (7) as seen transversely to the casting direction.
8. Plant according to claim 7, wherein each of the longitudinal girders (6) comprises connecting means (8) at one of its ends as seen in casting direction and has at its other end a region (9) which is substantially complementary with that of the connecting means (8) so that two supporting segment carriers (3) arranged in succession in casting direction are movably connectible by the connecting means (8) of a first supporting segment carrier (3) with the complementary region (9) of a second supporting segment carrier (3).
9. Plant according to claim 8, wherein the connecting means (8) is formed substantially by a forked head (8).
10. Plant according to claim 1, wherein the plant is so constructed that the metal strip can be bent from a substantially vertical position into a substantially horizontal position and wherein the plant comprises between five and nine interconnected supporting segment carriers (3), which are arranged in a row, for bending the strip into the horizontal position.

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