DE102014202995A1 - Frame for a strand guide segment - Google Patents

Abstract

The invention relates to a frame (5, 6), in particular upper frame (5) or lower frame (6), for a strand guide segment (3) of a strand guiding device (1) of a continuous casting plant (2), comprising - at least one arranged transversely to the strand guiding direction (7) Roller crossmember (8) on which at least one strand guide roller (9) is rotatably arranged, - two side elements (10) parallel to the strand guide direction (7) and spaced from each other, on which the roller crossmember (9) in the strand thickness direction (11) movably mounted is, - at least one of the side elements (10) fixedly interconnecting, transverse to the strand guide direction (7) arranged crosspiece (12), and - at least two controllable actuators (13), by means of which the roller crossmember (9) in the strand thickness direction (11) is movable In which an actuator (13) acts on an end region of the roller crossbeam (9) and on one of the side elements (10), and wherein the other actuator (13) 13) engages the other end portion of the roller beam (9) and the other side member (10).

Description

The invention relates to a frame, in particular upper frame or subframe, for a strand guide segment of a strand guiding device of a continuous casting plant.

Furthermore, the invention relates to a strand guide segment for a strand guiding device of a continuous casting plant, comprising a top frame and a bottom frame.

Furthermore, the invention relates to a strand guide device for a continuous casting, comprising a plurality of strand guide segments arranged in series.

From the publication WO 2011/095383 A1 For example, there is known a strand guide segment for a segmented strand guiding device of a continuous casting machine having a top frame, a bottom frame and two side frames fixedly connected to the bottom frame. This strand guide segment has a single role employment, wherein individual strand guide rollers of the upper frame are individually adjustable against a guided by the strand guide segment strand. For this purpose, each own engageable strand guide roller assigned a separate roller carrier and a separate crosshead, wherein the roller carriers are connected via an adjusting device with the crossheads. The roller carriers are guided in the strand thickness direction movable on the side frame. Because of the arrangement of the crossheads the roller carriers, adjusting and strand guide rollers are arranged difficult to access, which increases the cost of servicing a corresponding strand guide segment.

The publication WO 2009/144001 A1 discloses a strand guide segment for a segmented strand guide of a steel slab continuous casting plant, wherein the strand guide segment comprises means with which the upper frame and the subframe of the strand guide segment can be adjusted and aligned in the strand guiding direction relative to each other. As a result, an improved supporting, bending and straightening situation can be achieved and the so-called bulging effect in the casting mirror can be avoided.

The European patent EP 1 289 689 B1 relates to a strand guide segment having a single engageable strand guide roll for a segmented strand guide of a continuous casting machine, wherein a roll support displaceable in the strand thickness direction has guides which are in engagement with counter guides arranged on a guide element frame. The displaceable roller carrier is movable by means of an adjusting device provided with two pivot joints, wherein the connecting line between the two pivot joints, which corresponds to the line of action of the force application, is normal to the center axis of the displaceable strand guide roller.

The publication WO 2006/037555 A1 discloses a roller segment for a segmented strand guide of a continuous casting plant, wherein on the upper frame of the roller segment measuring devices are arranged, the measured values can be used to determine the core solidification and / or the sump tip in the continuous casting of metals.

The European patent EP 0 963 263 B1 deals with a segmented strand guide for a continuous slab caster wherein links are provided on a strand guide segment over which self-centering of the upper frame and / or sub-frame of the strand guide segment can occur during a strand guiding operation to prevent the occurrence of lateral forces in this frame and consequent wear or to avoid resulting form errors on the leading strand.

The object of the invention is to reduce the maintenance associated with an operation of a segmented strand guiding device of a continuous casting plant or related maintenance times and maintenance costs.

This object is achieved by a frame having the features according to claim 1, a strand guide segment having the features according to claim 8 and a strand guiding device having the features according to claim 11. Advantageous embodiments are given in the subclaims, which taken alone or in different combination with each other can represent an aspect of the invention.

• – wenigstens eine quer zur Strangführungsrichtung angeordnete Rollentraverse, an der wenigstens eine Strangführungsrolle drehbeweglich anordbar ist,
• – zwei parallel zur Strangführungsrichtung und zueinander sowie beabstandet voneinander angeordnete Seitenelemente, an denen die Rollentraverse in Strangdickenrichtung bewegbar gelagert ist,
• – wenigstens eine die Seitenelemente fest miteinander verbindende, quer zur Strangführungsrichtung angeordnete Quertraverse, und
• – wenigstens zwei ansteuerbare Aktoren, mittels denen die Rollentraverse in Strangdickenrichtung bewegbar ist,
• – wobei ein Aktor an einem Endbereich der Rollentraverse und an einem der Seitenelemente angreift, und wobei der andere Aktor an dem anderen Endbereich der Rollentraverse und an dem anderen Seitenelement angreift.

With claim 1, a frame, in particular upper frame or subframe, proposed for a strand guide segment of a strand guiding device of a continuous casting, comprising

• At least one roller cross member arranged transversely to the strand guiding direction, on which at least one strand guiding roller can be arranged in a rotationally movable manner,
• - Two parallel to the strand guide direction and each other and spaced from each other arranged side elements on which the roller cross member is movably mounted in the strand thickness direction,
• - At least one side elements firmly interconnecting, transverse to the strand guide direction arranged cross-beam, and
• At least two controllable actuators, by means of which the roller traverse is movable in the strand thickness direction,
• Wherein an actuator engages an end portion of the roller beam and one of the side members, and wherein the other actuator engages the other end portion of the roller beam and the other side member.

According to the invention, the roll traverse mounted movably in the strand thickness direction on the side elements for realizing a single roll adjustment via actuators is connected to the side elements which are rigidly interconnected via at least one transverse traverse. There is no crosshead above the roller beam and as conventionally required, as for example according to the above publication WO 2011/095383 A1 the case is. As a result, the roller traverse and the at least one arranged on the roller traverse strand guide roller are easily accessible from the outside, in particular to perform maintenance on these frame components with little effort and speed, whereby a longer downtime of a suitably equipped strand guide device can be avoided. The actuators are arranged according to the invention accessible to the frame without a component must be removed from the frame.

The frame may also have two or more corresponding transversely arranged to the strand guide direction movable roller traverses. At each movable roller traverse two or more mutually aligned strand guide rollers can be arranged rotatably.

The frame may also have two or more side members firmly interconnecting, arranged transversely to the strand guide direction cross members.

Each movable roller traverse are preferably associated with two controllable actuators, by means of which the respective roller crossbar is movable in the strand thickness direction.

By means of a frame in particular slabs, such as steel slabs, can be guided and processed according to the invention.

The strand to be guided can be formed continuously or segmented. In particular, a processing of slabs in the form of a so-called soft reduction machining can take place, wherein a precise position of the roll position on the guided slabs is possible. Furthermore, the frame can be used in a strand guide segment having a Cyberlink function, as for example in the Article "Innovation in Continuous Casting: Improving Quality and Efficiency through CyberLink Technology" in the journal "Steel and Iron", 2002 is described.

According to an advantageous embodiment, the frame has two or more transversely to the strand guide direction arranged in the strand thickness direction movably mounted on the side elements movable by means of two controllable actuators in strand thickness direction roller traverses, wherein the roller traverses are arranged in strand guide direction in alternation with the at least one cross-beam. This represents a structurally high-quality and robust design of the frame. It can be provided that on each side and on the exit side a respective cross-member is arranged, between which the roller traverses are arranged.

According to a further advantageous embodiment, at least one actuator is designed as a working cylinder, in particular plunger cylinder, whose piston rod acts on the respective roller beam. Preferably, all actuators are designed as, in particular hydraulic, working cylinder. This represents a structurally simple, cost-effective and at the same time robust design of the actuators.

Advantageously, the cylinder stroke of the working cylinder is in a range of 2 mm to 50 mm. A cylinder stroke in a range of 2mm to 50mm is particularly advantageous when using the frame to form a cyberlink strand guide segment. The dimensioning of the respective cylinder stroke can take place taking into account a desired soft reduction rate.

Preferably, the cylinder stroke is limited in the direction of a guided strand by at least one adjustable mechanical end stop. This provides a simple limitation on the mobility of a piston of a working cylinder or a movable roller traverse. The adjustability of the mechanical end stop makes it possible to adapt the frame to the respective circumstances and requirements.

According to a further advantageous embodiment, a working pressure can be applied by means acting on a roller beam working cylinders, which is up to 20% above a force acting on the roller traverse ferrostatic pressure or a total pressure from the ferrostatic pressure and a conditional by a soft reduction reaction pressure. This makes optimal processing of a guided strand possible.

The frame preferably has at least one displacement sensor cooperating with the working cylinder. In a soft reduction processing of a strand, the load-bearing capacity of the strand behind the solidification usually increases to a considerable extent. Therefore, it may happen that movable roller trays or arranged on this strand guide rollers dodge the strand and move away from their mechanical constraints on the frame. By means of the displacement sensor, such a deflection of the strand guide rollers can be detected and used for a control of downstream strand guide segments, for example, to determine their input-side opening dimensions.

With claim 8, a strand guide segment for a strand guiding device of a continuous casting plant is proposed, comprising an upper frame and a lower frame, characterized in that the upper frame and / or the subframe according to one of the aforementioned embodiments or any combination thereof is formed. With this strand guide segment, the advantages mentioned above with respect to the frame are connected accordingly.

The upper and / or subframe may for a strand guide segment, in which the expected expected the bottom tip of the guided strand, acting on the upper frame and on the lower frame Langhubzylindern having, for example, a cylinder stroke in a range of 100 mm to 500 mm, on a Inclination between the input side and the output side strand guide roller can be adjusted, which corresponds to the natural shrinkage of the solidified strand shell in this strand section plus the desired Softreduction rate. All other strand guide segments of a strand guiding device, that is, the strand guide segments arranged in front of and behind the sump tip, can be adjusted to the usual machine taper, which usually has the natural shrinkage of the solidified strand shell or of the solidified through, if they have an online Gießdickenverstellung Strangs aimed.

An existing strand guide device can be retrofitted in a simple manner with appropriate strand guide segments.

According to an advantageous embodiment, the strand guide segment has two parallel to the strand guide direction and each other and spaced from each other arranged side frame over which the upper frame is movably connected to the subframe. The upper frame and / or the lower frame are movably connected to the side frames.

According to a further advantageous embodiment, at least one roller traverse over, preferably elastically formed, guide elements so movably mounted in the strand thickness direction on the side elements, that the roller cross member is mounted transversely to the strand thickness direction movable on the side members to a predetermined extent. In this way, despite the massive side frames of the strand guide segment Cyberlink function, ie a self-centering of movable roller trays and strand guide rollers can be realized. The guide elements are preferably designed friction or friction.

With claim 11, a strand guiding device for a continuous casting plant is proposed, comprising a plurality of strand guide segments arranged in series, characterized in that at least one strand guide segment according to one of the aforementioned embodiments or any combination thereof is formed. With this strand guide device, the advantages mentioned above with respect to the frame or the strand guide segment are connected accordingly.

Advantageously, the strand guiding device has an electronic automation device, electrical connections being present between the individual strand guiding segments and the automation device, which are designed in such a way that by means of the automation device it can be detected which strand guiding segments are arranged at which position in the strand guiding device. As a result, a confusion between different strand guide segment types can be excluded.

It is also proposed that the automation device is set up to carry out a strand guide individually, taking into account the strand guide segments arranged in the respective strand guiding device. This makes a case-based automation of the strand guiding device possible.

In the following, the invention will be explained by way of example with reference to the attached figures with reference to preferred exemplary embodiments, wherein the features illustrated below may represent an aspect of the invention both individually and in various combinations with one another. Show it

1 FIG. 2: a schematic representation of an exemplary embodiment of a strand guiding device according to the invention, FIG.

2 FIG. 2 is a schematic and perspective view of an exemplary embodiment of a strand guide segment according to the invention, FIG.

3 FIG. 2: a schematic partial sectional view through the in 2 shown strand guide segment,

4 : a top view of the in 2 shown strand guide segment,

5 : a horizontal section through the in 2 shown strand guide segment,

6 a vertical longitudinal section through the in 2 shown strand guide segment,

7 a vertical cross section through the in 2 shown strand guide segment,

8th a horizontal section through a further embodiment of a strand guide segment according to the invention, and

9 : A schematic and perspective view of another embodiment of an inventive strand guide segment.

1 shows a schematic representation of an embodiment of a strand guiding device according to the invention 1 for a continuous casting plant 2 , The strand guide device 1 has a plurality of strand guide segments arranged in series 3 on, of which at least one strand guide segment 3 according to the 2 to 9 is trained.

Furthermore, the strand guiding device comprises 1 an electronic automation device 4 , wherein between the individual strand guide segments 3 and the automation device 4 not shown electrical connectors are present, which are designed such that by means of the automation device 4 can be detected, which strand guide segments 3 at which position in the strand guiding device 1 are arranged. Furthermore, the automation device 4 set up, a strand guide taking into account in the respective strand guide device 1 arranged strand guide segments 3 individually.

2 shows a schematic representation of an embodiment of an inventive strand guide segment 3 for a strand guiding device 1 a continuous casting plant 2 wherein the strand guide segment is formed as a Cyberlink strand guide segment. The strand guide segment 3 includes a top frame 5 and a subframe 6 ,

The upper frame 5 includes several transverse to the strand guide direction 7 arranged roller traverses 8th , on each of which two strand guide rollers 9 aligned with each other and are arranged rotatably. Furthermore, the upper frame includes 5 two parallel to the strand guide direction 7 and each other as well as spaced apart side elements 10 on which the roller traverses 8th in strand thickness direction 11 are movably mounted. In addition, the upper frame includes 5 several the page elements 10 firmly interconnecting, transverse to the strand guide direction 7 arranged crossbars 12 , Furthermore, the upper frame comprises 5 several controllable actuators 13 by means of which the roller traverses 8th in strand thickness direction 11 are movable, with a roller traverse 8th assigned actuator 13 at an end portion of the roller beam 8th and on one of the side elements 10 attacks and wherein the other of the roller beam 8th assigned actuator 13 at the other end of the roller beam 8th and on the other side element 10 attacks. The roller traverses 8th and the crossbars 12 are arranged alternately.

The actors 13 are each designed as a working cylinder, in particular plunger cylinder or Kurzhubzylinder, whose piston rod to the respective roller crossmember 8th engages and whose cylinder stroke is in a range of 2 mm to 50 mm. The cylinder stroke is limited in the direction of a guided strand by at least one, not shown, adjustable mechanical end stop. By means of the on a roll traverse 8th attacking actors 13 or working cylinders, a working pressure can be applied, which is up to 20% above one on the respective roller beam 8th acting ferrostatic pressure or over a total pressure from the ferrostatic pressure and a pressure due to a softreduction reaction. The actors 13 or working cylinder each act together with a position sensor, not shown.

The roller traverses 8th are over, preferably elastically formed, guide elements 14 such in the strand thickness direction 11 movable on the side elements 10 is stored that the roll traverses 8th to a predetermined extent transverse to the strand thickness direction 11 movable on the side elements 10 are stored, what by the double arrow 15 should be indicated. A coupling unit effecting the cyberlink function 16 on the one hand engages the upper frame 5 and on the other hand on the subframe 6 at.

3 shows a schematic partial sectional view through the in 2 shown Strand guide segment 3 , There are some of the roller traverses 8th arranged guide elements 14 to see.

4 shows a plan view of the in 2 shown strand guide segment 3 , It can be seen that the roller traverses 8th about leadership units 17 in strand guide direction 7 laterally opposite the crossbeams 12 are supported, each guide unit 17 one on the respective roller beam 8th arranged guide element 18 and one at the respective cross-beam 12 arranged guide element 19 having. On the guide elements 18 and 19 is each a slider 27 arranged. The upstream and downstream arranged roller traverses 8th are each end with a guide body 20 connected, which in strand thickness direction 11 movable on the side elements 10 are stored and in on the side elements 10 trained grooves 23 intervention. In addition, the upstream and downstream arranged roller traverses 8th at the center of the respective crossbeam 12 arranged guide devices 21 in strand thickness direction 11 movable at the respective crossbeams 12 stored and opposite the crossbeams 12 supported. In the 4 Guide device shown above 21 differs in structure from the in 4 shown below guide device 21 , In the guide device shown above 21 engages a T-shaped trained, with a crossbeam 12 connected body 24 in a direction parallel to the strand thickness direction 11 extending guide groove 25 one, which by one at the roll traverse 8th arranged guide unit 26 is formed.

5 shows a horizontal section through the in 2 shown strand guide segment 3 , whereby the structure of the guide body 20 and the leadership facilities 21 and the arrangement of the guide elements 14 is more apparent.

6 shows a vertical longitudinal section through the in 2 shown strand guide segment 3 ,

7 shows a vertical cross section through the in 2 shown strand guide segment 3 ,

8th shows a horizontal section through a further embodiment of a strand guide segment according to the invention 3 , In contrast to that in the 2 to 7 embodiment shown are the side elements 10 of the upper frame 5 over only two crossbeams 12 firmly connected. On the side elements 10 are guide grooves 28 arranged at which elastically formed guide elements 14 are arranged, over which the movable roller traverses 8th such in the strand thickness direction 11 movable on the side elements 10 are stored that the roll traverses 8th to a predeterminable extent according to the double arrow 15 transverse to the strand thickness direction 11 movable on the side elements 10 are stored.

9 shows a schematic and perspective view of another embodiment of a strand guide segment according to the invention 3 , wherein the strand guide segment 3 two parallel to the strand guide direction 7 and side frames spaced from each other 22 over which the top frame 5 with the subframe 6 connected is. The page frames 22 are stuck to the subframe 6 whereas the upper frame 5 along the vertical extent of the side frames 22 in strand thickness direction 11 is movably guided. The movable roller traverses 8th of the strand guide segment 3 are about elastically formed guide elements 14 such in the strand thickness direction 11 movable on the side elements 10 stored that the roller traverses 8th to a predeterminable extent according to the double arrow 15 transverse to the strand thickness direction 11 movable on the side elements 10 are stored, whereby the strand guide segment 3 despite the page frame 22 has a cyberlink function.

LIST OF REFERENCE NUMBERS

1

 Strand guide

2

 continuous casting plant

3

 Strand guide segment

4

 automation equipment

5

 top frame

6

 subframe

7

 Strand guiding direction

8th

 Traverse role

9

 Strand guide roller

10

 page element

11

 Strand thickness direction

12

 crossbeam

13

 actuator

14

 guide element

15

 double arrow

16

 coupling unit

17

 Guide unit

18

 guide element

19

 guide element

20

 guide body

21

 guide means

22

 side frame

23

 groove

24

 body

25

 guide

26

 Guide unit

27

 sliding

28

 guide

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2011/095383 A1 [0004, 0012]
• WO 2009/144001 A1 [0005]
• EP 1289689 B1 [0006]
• WO 2006/037555 A1 [0007]
• EP 0963263 B1 [0008]

Cited non-patent literature

• Article "Innovation in Continuous Casting: Improving Quality and Efficiency through CyberLink Technology" in the journal "Steel and Iron", 2002 [0017]

Claims (13)

Frame ( 5 . 6 ), in particular upper frame ( 5 ) or subframe ( 6 ), for a strand guide segment ( 3 ) a strand guiding device ( 1 ) of a continuous casting plant ( 2 ), comprising - at least one transverse to the strand guide direction ( 7 ) arranged roller traverse ( 8th ), at least one strand guide roller ( 9 ) is rotatable, - two parallel to the strand guide direction ( 7 ) and each other as well as spaced apart side elements ( 10 ), on which the roller crossbeam ( 9 ) in the strand thickness direction ( 11 ) is movably mounted, - at least one of the side elements ( 10 ) firmly interconnecting, transversely to the strand guide direction ( 7 ) arranged cross-beam ( 12 ), and - at least two controllable actuators ( 13 ), by means of which the roller traverse ( 9 ) in the strand thickness direction ( 11 ) is movable, - wherein an actuator ( 13 ) at one end region of the roller crossbeam ( 9 ) and one of the page elements ( 10 ) and wherein the other actuator ( 13 ) at the other end region of the roller crossbeam ( 9 ) and on the other side element ( 10 ) attacks. Frame ( 5 . 6 ) according to claim 1, characterized by two or more transversely to the strand guiding direction ( 7 ), in the strand thickness direction ( 11 ) movable on the side elements ( 10 ), by means of two controllable actuators ( 13 ) in the strand thickness direction ( 11 ) movable roller traverses ( 9 ), wherein the roller traverses ( 9 ) and in strand guidance ( 7 ) in alternation with the at least one cross-beam ( 12 ) are arranged. Frame ( 5 . 6 ) according to claim 1 or 2, characterized in that at least one actuator ( 13 ) is designed as a working cylinder, in particular plunger cylinder, whose piston rod on the respective roller crossbeam ( 9 ) attacks. Frame ( 5 . 6 ) according to claim 3, characterized in that the cylinder stroke of the working cylinder is in a range of 2 mm to 50 mm. Frame ( 5 . 6 ) according to claim 4, characterized in that the cylinder stroke is limited in the direction of a guided strand by at least one adjustable mechanical end stop. Frame ( 5 . 6 ) according to one of claims 3 to 5, characterized in that by means of a roller traverse ( 9 ) acting working cylinders, a working pressure can be applied, which is up to 20% above one on the roller beam ( 9 ), or above a total pressure from the ferrostatic pressure and a pressure due to a soft-reduction reaction. Frame ( 5 . 6 ) according to claim 3 to 6, characterized by a cooperating with the working cylinder encoder. Strand guide segment ( 3 ) for a strand guiding device ( 1 ) of a continuous casting plant ( 2 ), comprising a top frame ( 5 ) and a subframe ( 6 ), characterized in that the upper frame ( 5 ) and / or the subframe ( 6 ) is formed according to one of claims 1 to 7. Strand guide segment ( 3 ) according to claim 8, characterized by two parallel to the strand guiding direction ( 7 ) and each other as well as spaced apart side frames ( 22 ), over which the upper frame ( 5 ) movable with the subframe ( 6 ) connected is. Strand guide segment ( 3 ) according to claim 9, characterized in that at least one roller traverse ( 9 ) via, preferably elastically formed, guide elements ( 14 ) in the strand thickness direction ( 11 ) movable on the side elements ( 10 ) is mounted, that the roller crossbeam ( 9 ) to a predetermined extent transverse to the strand thickness direction ( 11 ) movable on the side elements ( 10 ) is stored. Strand guiding device ( 1 ) for a continuous casting plant ( 2 ), comprising a plurality of strand guide segments arranged in series ( 3 ), characterized in that at least one strand guide segment ( 3 ) is formed according to one of claims 8 to 10. Strand guiding device ( 1 ) according to claim 11, characterized by an electronic automation device ( 4 ), wherein between the individual strand guide segments ( 3 ) and the automation device ( 4 ) electrical connections are provided, which are designed such that by means of the automation device ( 4 ), which strand guide segments ( 3 ) at which position in the strand guiding device ( 1 ) are arranged. Strand guiding device ( 1 ) according to claim 12, characterized in that the automation device ( 4 ) is arranged, a strand guide taking into account in the respective strand guiding device ( 1 ) arranged strand guide segments ( 3 ) individually.

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