Metal founding – Means to shape metallic material – Continuous or semicontinuous casting
Reexamination Certificate
2000-03-06
2001-11-27
Copenheaver, Blaine (Department: 1725)
Metal founding
Means to shape metallic material
Continuous or semicontinuous casting
C164S448000, C164S443000
Reexamination Certificate
active
06321827
ABSTRACT:
BACKGROUND OF THE INVENTION
1. FIELD OF THE INVENTION
The invention relates to a supporting roll framework for continuous metal, in particular steel, casting installations
2. DISCUSSION OF THE PRIOR ART
A supporting roll framework of the generic type is known from DE German reference 196 06 308 B1. This supporting roll framework is divided into straight or curved segments with roll carriers, a plurality of rolls being assembled on one roll carrier. In each case two roll carriers, designed as a flexurally rigid frame element in the form of a welded sheet construction, for parallel end sides are attached to holding elements which run on both sides next to the cross section of the casting strand. The rolls are mounted on both sides in bearings, the housings of which are in turn connected to the roll carrier. Both frame elements have a protruding extension at each end, between which in each case one side element, which is designed in the form of welded sheet construction, is pressed in and releasably connected to the two frame elements by means of expansion-shank bolts. The flexurally and torsionally rigid supporting roll segment formed in this way has smooth and planar inner surfaces. Both frame elements are provided with carriers which extend in the running direction of the strand, are of T-shaped design and to which the corresponding bearing housing is releasably attached. The cooling medium supply and discharge is integrated in the frame element, and the bearing housing, which is likewise cooled, is connected to the cooling medium supply or discharge by means of a passage formed in the T-shaped carrier.
A drawback of this known supporting roll framework is the difficulty of access in the event of a defective roller or a defective bearing. Another drawback is the way in which the cooling medium is guided in the frame element, since the cooling medium flowing back from the roll in question is guided through the frame part with a number of diversions.
SUMMARY OF THE INVENTION
The object of the invention is to provide a supporting roll framework for continuous metal, in particular steel, casting installations which, while achieving the same flexural and torsional rigidity, is more easily accessible in order to allow simplified maintenance and can optionally be used for a dry and a wet process. A further object is to simplify the guidance of cooling medium in the frame element.
According to the invention, this is achieved by means of a frame element which, as a carrying element, has at least two pipes which lie parallel to and at a distance from one another, transversely with respect to the running direction of the strand. A reinforcing web plate is welded in between the pipes. In each case one holding plate directed toward the strand is attached to the outer lateral surface of the outer pipes, between which holding plates the carrier which carries the rolls is welded in. In the case of internally cooled rolls, the pipes function as a cooling medium supply and discharge, which for this purpose are provided with a connection stub on the outside lateral surface.
The frame elements formed in this way are connected to the side elements by means of the protruding extension which is known per se and has, matched to the pipe design, a section which is of peg-like design and can be pressed into the pipe and, adjoining this section, a flat section which rests on the narrow sides, facing toward the frame elements, of the side elements. The frame element advantageously has three pipes which are arranged symmetrically and at a distance from one another as the carrying element, the middle pipe being provided with a connection stub for the spray water. In this way, it is also possible, in a simple manner, to optionally select a wet process using the supporting roll framework.
To improve guidance of the cooling medium in the pipes, which are designed as the carrying element, these pipes have a coaxially arranged displacement pipe which has a smaller external diameter than the internal diameter of the carrying element.
The advantage of the proposed construction is that to simplify maintenance the accessibility has been facilitated and the cooling-medium guidance in the frame element has been simplified.
REFERENCES:
patent: 3603377 (1971-09-01), Khimich et al.
patent: 4034796 (1977-07-01), Loibl et al.
patent: 4146083 (1979-03-01), Scheurecker et al.
patent: 4485837 (1984-12-01), Wiesinger et al.
patent: 4559990 (1985-12-01), Greilinger et al.
patent: 6059013 (2000-05-01), Krume
patent: 1 282 240 (1968-11-01), None
patent: 196 06 308 C (1997-04-01), None
Divjak Franz-Josef
Gohres Hans-Werner
Klasen Klaus Peter
Kocian Manfred
Lenk Rainer
Cohen & Pontani, Lieberman & Pavane
Copenheaver Blaine
Mannesmann AG
Tran Len
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