EP2747915A1

EP2747915A1 - Roller device

Info

Publication number: EP2747915A1
Application number: EP12743977.6A
Authority: EP
Inventors: Axel Stavenow; Erich Hovestädt
Original assignee: SMS Siemag AG
Current assignee: SMS Group GmbH
Priority date: 2011-08-24
Filing date: 2012-08-06
Publication date: 2014-07-02
Anticipated expiration: 2032-08-06
Also published as: DE102011081467A1; EP2747915B1; WO2013026689A1

Abstract

The invention relates to a roller device (1), in particular for forming a strand-guiding segment (100) of a casting machine, comprising at least one roller element (10) mounted on roller bearings (20, 22), wherein two roller bearings are connected together via a crosspiece (30) comprising a line means for a medium.

Description

roller device

Technical area

The present invention relates to a roller device, in particular for forming a strand-guiding segment of a casting machine, comprising at least one roller element mounted on roller bearings.

PRIOR ART Roller devices with roller elements mounted on roller bearings are known.

From DE 26 37 179 a strand guide for a continuous casting plant is known, wherein the bearing the respective rollers bearing housing are each cooled by means of a coolant. The coolant is supplied via separate pipes.

JP 08168859 A shows a device for cooling roll segments in a continuous casting plant, wherein the bearing housings of the respective roll segments are supplied with coolant by means of separately supplied pipelines.

From EP 1 355 752 B1, a strand guide segment is known which, in addition to a plurality of rollers, also comprises cross member elements, which are used for secondary cooling of a slab. A disadvantage of the previously known solutions, which use a coolant supply via separate pipes, is that these pipes are prone to disturbances due to the high temperature load in casting machines and the risk of breakthroughs in a special way.

If individual segments have to be repaired or a regular exchange of the respective roller devices takes place, these prior art roller devices must each be solved by separate media feeds, for example pipelines, for each roller element or for each roller bearing. This keeps repair times, maintenance costs and plant downtime at a significant level.

Detailed description

Starting from the known state of the art, it is an object of the present invention to increase the plant availability and the reliability of roller devices, in particular in casting machines. The object is achieved by a roller device with the features of claim 1. Advantageously, developments of the invention are specified in the subclaims.

definitions

The term "segment" means a structural unit in a strand guiding device.A segment consists of a top frame associated with the top of the casting strand and a bottom frame associated with the bottom of the casting strand strand The top frame and bottom frame each carry on their sides facing the casting strand preferably a plurality of roller devices between which the casting strand is guided.

The term "strand guiding device" designates the part of a continuous casting plant downstream of the mold After its exit from the mold, the casting strand, which is generally still liquid at first, is supported by the strand guiding device and deflected in the horizontal direction The strand guiding device can be constructed from individual segments Term "secondary cooling" means the cooling of the casting strand during its passage through the strand guiding device by spraying a cooling medium.

According to claim 1, a roller device is provided, in particular for forming a strand-guiding segment of a casting machine. The roller device comprises at least one roller element mounted on roller bearings. According to the invention, two roller bearings are connected to one another via a web comprising a conduit means for a medium. Several such roller devices can be assembled, for example, to strand guides of casting machines, in particular to complete casting sheets or to individual segments, or be designed as a driving rollers, transport rollers or straightening rollers. By connecting the roller bearings via a web, which comprises at least one conduit means for a medium, it can be achieved that a separate supply of roller bearings with a medium, for example a cooling medium for cooling the roller bearings, a cooling medium for cooling the rollers and / or a lubricant for lubricating the roller bearings is no longer necessary. Rather, the respective medium must be fed only once per roller device and - for example in the case of a cooling medium - be derived only once. The distribution of the respective medium to the different roller bearings and roller elements is then achieved via the conduit means provided in the web or webs. In other words, the reliability of a system can be increased with the proposed roller device, since the roller bearings no longer need to be individually supplied with media. Furthermore, the system availability can be increased as a result, since the number of media connections to be connected is significantly reduced compared with conventional roller devices in the case of a possible replacement of a roller device, and the replacement can be correspondingly faster and easier.

By laying the conduit means in the respective web between the roller bearings, the conduit means are also better protected against the conditions prevailing in a casting machine, especially against high temperatures and mechanical stress, as if they had to be performed outside the web individually to the roller bearings. In this way, a higher reliability and availability of the system is achieved. Furthermore, during repair work additional assembly operations for the connection of separate pipes, for example, for the supply and discharge of the cooling medium to each roller bearing.

The term media here, in addition to the different cooling media and lubricating media, which must be supplied to a roller device and partially removed from this, also power supplies for sensors and switching devices, as well as data buses understood. In other words, the term media here means all operating means and control means which are supplied to the roller device during operation and / or discharged therefrom. Preferably, the web comprises conduit means for at least two different media. Thereby, that conduit means for at least two media and advantageous For a variety or all of the media necessary to operate the roller means are received in the web, the reliability and availability of a corresponding casting machine can be further increased, since all the conduit means received in the web have the advantages described above.

Conductive means are advantageously provided for conducting at least one of the following media: a cooling medium for cooling the roller bearings, a cooling medium for the internal cooling of the rollers, a lubricant for lubricating the roller bearings, a cooling medium for a secondary cooling (eg single substance or two-fluid cooling), a hydraulic medium for a hydraulic control line, a compressed air medium for a pneumatic control line, a line medium for an electrical power supply, a line medium for electrical control signals, a conducting medium for electrical measuring signals, a conducting medium for optical measuring signals, or an electrical and / or optical bus system.

The roller bearings preferably have connection sections for direct connection to a segment frame. In this way, a simple connection to the segment frame can be achieved, since a secure connection can take place in particular only via the connection sections. As a result, only relatively narrow shots on the segment frame are necessary, which only need to accommodate the respective connection sections of the roller bearings. These attachment portions typically have dimensions that correspond to the cross section of the roller bearings.

In a particularly preferred development, the web extends between opposing end faces of two roller bearings. In this case, the web can be arranged at a distance from the attachment sections at the respective end faces, in particular between the attachment sections and a plane defined by the circumference of the roller elements. This way will achieves a space-saving arrangement of the web and the connection of the roller device to a segment frame is simplified in that only the connecting portions of the roller bearings come into connection with the segment frame, but not the web. In other words, the web is spaced from the plane connecting the connecting sections, so that the connecting sections, more or less like stands, protrude beyond the web.

In order to achieve an advantageous space utilization and to form a flat-forming roller device, the web preferably extends parallel to the axis of the roller element.

In a further preferred embodiment, the web is welded to the roller bearings, screwed or glued and / or flanged to the roller bearings. Thus, a cost-effective production of the roller device is made possible, since the web is initially inexpensive to produce as a separate component and then can be connected to the roller bearings accordingly. In this way, it is also possible to select the material of the web and the material of the roller bearings of the respective application, so that a cost saving can be achieved here as well.

In a further preferred embodiment, at least one media guide is also provided in the roller bearings, wherein the at least one media guide communicates with at least one conduit means of a web. Preferably, a conduit means of a first land communicates with a conduit means of a second land via a media guide in a roller bearing. By communicating with one another conduit means and media guides, a flexible and efficient passage or supply of the respective media to the roller bearings and other components across the width of the roller device can be achieved. In particular, in this way all components of the roller device can be supplied with the respective media via a single media connection of the roller device since the distribution of the media within the roller means takes place via the web (s). Accordingly, the supply of the media to the individual components and the connection of the respective media supply lines to the roller device can be substantially simplified.

The cooling medium for the storage cooling, the internal roll cooling and / or the secondary cooling can be carried out as single-substance cooling, for example water, or as two-substance cooling, for example a water / air mixture. Of course, as a cooling medium, other mixtures, including multi-component mixtures, are used.

Preferably, the conduit means for the media in the roller means in the form of a bore in the web, in particular a deep hole, in the form of, for example, at least one lid closable channel in the web, in the form of an open channel, in the form of a sealed channel with silicone , and / or provided in the form of at least one laid within the web pipeline. A simple and reliable production of the respective media webs can be achieved. Furthermore, the roller device can be pre-assembled in the segment prior to final assembly, tested for function and aligned. Thus, the roller device can be constructed as a complete module and the corresponding guided in the web or the webs conduit means for the media can be fully tested and pre-adjusted already in this pre-assembled state. In this way, a segment can be repaired in less time and with less effort. For example, a possibly damaged roller device, for example within a segment comprising 14 roller devices, can be easily exchanged. Since the roller device is preassembled, pre-tested and pre-adjusted, the replacement of the reel unit in the segment can proceed swiftly. Accordingly, the repair effort and the Repair times in the segment workshop compared to conventional segments can be reduced.

A quick and reliable installation of the roller device can be achieved in that at least one provided at an end face of a roller bearing media connection communicates with at least one conduit means.

In addition or as an alternative, at least one media connection provided on one longitudinal side and / or one rear side of the web can communicate with at least one conduit means.

In order to achieve a correspondingly fast assembly and easy maintenance, the respective media connections, which communicate with the conduit means in the webs, are provided on one end side, longitudinal side or rear side of the web. In this way, it is for example possible to screw a roller device to the respective support frame of a segment and then the respective inlets and outlets, for example for the cooling medium circuits, the grease circuit, the power supplies and the sensor and switching devices only by simply connecting coupling devices to connect the corresponding media connections with the roller device. The media connections of the webs can be designed so that the media connections are already automatically coupled by placing the roller device on a segment framework with the respective supply lines. An efficient connection device can for example be provided via suitable coupling elements, such as hybrid connectors, water retaining plates with flat gaskets, connecting pipes with O-rings on both sides, etc., so that the connection of the respective supply and discharge lines to the roller device can easily and reliably take place. Preferably, the plug, coupling and coupling elements are designed so that they can lead at least two media simultaneously. In this way, the respective connection can be made more efficient, since the number of coupling operations can be reduced.

In a further preferred embodiment, a media connection is provided on a longitudinal side of the roller device in such a way that it can communicate with a corresponding media connection of an adjacent roller device and in particular allows a direct coupling of the line devices corresponding to the media connection in the two roller devices. By pushing the two roller devices together, a coupling of the respective media connections can already be achieved in this way. Thus, for example, a cooling circuit can be continuously produced from a first reel unit to the last reel unit, quasi in a series connection, without the need for separate piping of the roller devices located in the segment. In other words, a coolant supply line can be connected to the first roller device, the coolant then flows through all adjacent roller devices and the coolant outlet is connected to the last roller device. Thus, the number of externally supplied connections can be further reduced drastically. Such a construction is of course also conceivable for measuring signals which can be transferred by means of a media connection between the respective roller devices, so that a single connection of a measuring bus to one side of a segment can be sufficient to be able to pick up the signals of all the roller units of the segment.

Furthermore, it is possible by the arrangement of the conduit means in the webs to form arc segments with small roll diameters and small Gießradius, which was previously complicated due to the large number of supplied pipes and error prone, or was not possible due to the lack of accessibility to carry out welding , By the present role facilities can now be also form casting machines with small casting radii, for example 4000 to 5000 mm, the rolls also allowing small roll diameters, for example 120 mm to 180 mm.

Various signal lines for different measuring tasks, such as, for example, bearing force, storage temperature, line temperature, cooling medium temperature, flow rates, pressures, moisture, etc., can be accommodated in the media supply and distribution devices within the roller device. These measurement signals can then be tapped at a central location, for example at the front, a portion of the longitudinal side or on the back of the roller device, in particular the respective web, for example via a multi-function plug, an intelligent terminal, a data bus connection or in another efficient manner without having to route signal lines to the respective sensors outside the bridge. Accordingly, the routing can be made more efficient here and the corresponding signal lines are no longer in the thermal and mechanical danger zone of the casting line.

Another advantage of this is that the sensors of the roller device already in the modular state, ie before the roller device is installed in a segment, can be completely pre-assembled, pre-tested and preset or adjusted, since the roller device can form a self-contained system. For this purpose, the webs preferably take on structural tasks in such a way that a module pre-adjusted in this way can be transported for installation in the segment and can be installed in it without the module being substantially misadjusted again. The individual conduit means for the different media can also be fully tested for function. Due to the modular design and the complete functional test, the installation times in the respective segments can be significantly reduced.

Brief description of the figures Preferred further embodiments and aspects of the present invention will become more apparent from the following description of the figures. Showing:

Figure 1 is a schematic perspective view of a roller device in a first embodiment;

Figure 2 is a schematic perspective view of a roller device in a second embodiment;

Figure 3 shows schematically a side view of the fixed side and the

Lot side with a segment; and FIG. 4 shows a schematic side detail view of the segment of FIG

FIG. 3.

Description of the preferred embodiments

In the following, preferred embodiments will be described with reference to the figures. Here, the same or similar elements are denoted by the same reference numerals, and a repetitive description of these elements will be omitted partially to avoid redundancy.

Figure 1 shows a first embodiment of a roller device 1 in a schematic perspective view. The roller device 1 comprises three roller elements 10, which are each mounted between roller bearings 20, 22. In this case, two roller bearings 22 on the respective outer sides of Roller device 1 is provided and further roller bearings 20 are provided as a center bearing.

Several such roller devices can be assembled, for example, to strand guides of casting machines, in particular to complete casting sheets or to individual segments, or be designed as a driving rollers, transport rollers or straightening rollers.

Between the roller bearings 20, 22 webs 30 are arranged, each connecting two roller bearings 20, 22 together. The webs 30 comprise, as will be explained in more detail below, conduit means for at least one medium.

The roller bearings 20, 22 have connection sections 24, which are provided for direct connection to a segment frame. The connecting sections 24 project beyond the lower plane of the webs 30, so that a simple connection to the segment frame is made possible and, in particular, only a correspondingly narrow receptacle on the segment frame is necessary in order to receive the connecting sections 24.

The webs 30 are arranged between the opposite end faces 26 of the roller bearings 20, 22 and are - depending on the design - welded, glued, screwed or flanged with these - depending on the design. The connection of the roller bearings 20, 22 to the webs 30 can be carried out so stable that the roller device 1 is formed as a module, which can be fully pre-adjusted and pre-tested, so that the roller device 1 as a module in a higher-level machine unit, such as a Segment of a casting plant, can be installed. The webs 30 are then formed so stable that the module can be transported in the aligned orientation and can be installed without the adjustment lost significantly goes. The assembly of the roller device 1 in the segment frame is significantly simplified by the modular design.

The roller device 1 comprises at one end face 12 a media connection 40, which is provided with means provided in the web 30, for example for a first medium circuit for cooling the roller bearings 20, 22, a second media circuit for internal cooling of the roller elements 10, and a third media circuit for supplying lubricants communicates to the roller bearings 20, 22. On the opposite end face 12 of the roller device 1, such a media connection 40 is also provided. Depending on the design, the respective inflow for the cooling media of the cooling circuits can be provided on the one side and the respective outflow for the cooling media on the opposite side, or inflow and outflow for a section of the roller device 1 on one side of the roller device 1, and on the other hand, the respective inflows and outflows are provided for the respective other area of the roller device 1.

A media connector 42 for a data bus is provided on a longitudinal side of the roller device 1. In the roller device 1 sensors for measuring different operating parameters are provided, for example, to measure the coolant temperatures at different locations in the roller device for measuring the bearing forces, the storage temperature, the strand temperature, the flow rates, the pressures, the humidity, etc. Furthermore, switching devices for On and off, for example, be provided different sections of the secondary cooling. Via the media connection 42, the corresponding signals of the sensors and corresponding switching commands can be transmitted, as well as the power supply for the sensors and the switches are made. The different media, so for example, the coolant of the first cooling circuit for storage cooling, the coolant for the second cooling circuit to Cooling of the roller elements 10, the water of a circuit for secondary cooling of a slab, the lubricant for lubricating the bearings 20, 22, hydraulic media or compressed air media for hydraulic or pneumatic controls, as well as the individual data lines, switching lines, sensor cables and power supplies for in the roller device 1 located sensors and switching elements are all performed within the webs 30 in the illustrated embodiment. This is achieved, for example, by introducing corresponding deep hole bores into the full material of the web as a conduit means in order to lay signal lines through these deep hole bores. The liquid and gaseous media, for example the cooling media of the roller bearing cooling circuit and the roller inner cooling circuit can also be guided in deep hole bores within the web 30. The lubricants can be performed in such deep wells.

A connection of the conduit means of the webs 30 with each other is achieved in that media guides are provided in the roller bearings 20, via which the conduit means of the webs 30 communicate with each other. In this way, a continuous supply of the roller device 1 with the respective media over the entire width of the roller device 1 away is possible. In particular, a supply of the entire roller device 1 with the respective media can be achieved via the media connections 40, 42.

In an alternative embodiment, the conduit means for the media are guided in a media channel milled into the full material of the webs 30, which is closed with a lid. The provision of a milled coolant channel, which is closed with a lid, for example, has the advantage that the coolant channel can be easily opened for maintenance purposes and can be cleaned accordingly. This is not so easy with a deep hole drilling. The signal lines, control lines and power supply can be easily inserted into such milled channels. The Milled media channels also allow easy access to the individual sensor positions.

The channels for the lubricant which is supplied to the roller bearings 20, 22, 5 may also be formed as a deep hole or as milled channels, which are provided with a lid. It is expediently provided for each of the roller bearings 20, 22 each have their own lubricant channel, so that the lubricant, for example, an oil-air mixture, which is supplied from a lubricant distributor, each individually to the individual 10 roller bearings 20, 22 can be distributed.

Although in the exemplary embodiment of the roller device 1 shown in FIG. 1, all media are conducted in conduit means within the webs, it is of course also possible to use only a portion of the media in conduit means

15 to lead within the webs and supply some of the media, as known from the prior art, from outside the roller device 1. The decision here is inter alia also on the actually desired design of the webs 30, in particular with regard to their volume. It goes without saying that in a web 30 relatively small volume / cross-section only

20 a limited number of media channels can be introduced.

In the present case, however, also conduit means, which are guided along the webs 30 and are fixedly connected to these, are considered to be encompassed by the web 30. In this case, the line means as the bridge

25 30 associated. If, for example, a conduit means in the form of a channel guided along the web 30 and fixedly connected thereto, this conduit means is considered to be encompassed by the web 30. Also a guided along the ridge 30 and firmly connected to this media line, such as a control line for transmission

30 of electrical or hydraulic control signals is considered to be encompassed by the bridge 30. The media transported via the conduit means include a cooling medium for cooling the roller bearings 20, 22, a cooling medium for the internal cooling of the rollers, a lubricant for lubricating the roller bearings 20, 22, a cooling medium for a secondary cooling, a hydraulic medium for a hydraulic control line Compressed air medium for a pneumatic control line, a line medium for an electrical power supply, a line medium for electrical control signals, a conducting medium for electrical measuring signals, a conducting medium for optical measuring signals, or an electrical and / or optical bus system.

Accordingly, a large part of the media, which were previously supplied via separate pipes and control lines from the outside, is now guided through corresponding channels and bores in the webs 30 to their respective destination. This has advantages in the assembly of the roller device 1, since not so many steps for installation of the roller device 1 are necessary because they can be installed as a module. Due to the installation as a module, in particular as a completely pre-assembled, pre-tested and aligned module, only the respective media supply lines must be connected to the media connections provided on the module after the module has been attached to the segmental framework. The corresponding coupling can be automatically provided already when placing the roller device 1 on the scaffold. This can be done in particular via connectors, such as plugs, coupling and coupling elements or similar devices to be connected easily.

On the other hand, the individual feeds of the media in the webs 30 are better protected against mechanical damage, breakthroughs and other disturbances that may occur during operation of a roller device 1. This significantly increases the reliability. FIG. 2 shows a further exemplary embodiment of the roller device 1. This embodiment is substantially similar to that shown in Figure 1, but additionally has devices for secondary cooling. A further media connection 44 is provided in order to communicate with the line means provided in the roller device 1 for supplying the water, which serves as cooling medium for the secondary cooling. For the secondary cooling water is provided from provided on the webs 30 nozzles 50 on the slab to achieve here a cooling of the slab. The media port 44, which communicates with the secondary cooling medium conducting means, is provided on one longitudinal side of the rolling device 1 in this embodiment. In another embodiment, the media port 44 may also be used as a port for a bearing cooling or a roller internal cooling. In a further preferred embodiment, a media circuit for the secondary cooling can also be accommodated in the roller device. For this purpose, advantageously water distribution chambers are provided for the nozzles in the roller line and it can continue switching valves are provided in or on the webs to turn on and off individual nozzles, for example, to provide a secondary cooling for different strand widths.

Depending on the particular media used and depending on the respective further application of the respective roller device 1, the corresponding terminals 40, 42 and 44 may be arranged on the roller device 30 in different positions. The arrangement shown by way of example in FIG. 1 is advantageous when individual roller devices 1 are attached to each other during installation in a higher-level machine unit, for example in a segment, in order to form a corresponding segment. In this case, an arrangement of at least the connections 44 for the secondary cooling medium and the connections 42 for the data bus on the longitudinal sides 34 of the roller device 1 is advantageous. hereby Namely, when the individual roller devices 1 are pushed together, a connection of the respective media circuits can be achieved virtually automatically. In other words, with respect to the juxtaposed roller devices for some conduit means, it is entirely possible to dispense with separate cabling or casing work. Just by the juxtaposition of the respective roller devices 1 to each other, the respective connection of the conduit means is achieved via the corresponding media connections. In this way, an even more efficient assembly can be achieved and the connections between the individual media lines in the respective roller devices are arranged in a secure position protected between the roller devices.

The individual media connections are in this embodiment according to a kind of series connection. Such a series connection is completely problem-free, for example in the case of a bus line, since a very large number of signals can be transported on the same bus. In the secondary cooling medium, a series connection is likewise possible without problems, since the secondary cooling medium does not substantially heat up along the casting direction and accordingly a continuous flow of secondary cooling medium from the first to the last roll device of a segment is easily feasible.

With regard to the cooling of the roller bearings 20, 22 and the cooling of the respective roller elements 10, such a series connection of roller devices 1 may also be possible. However, it should be noted here that a considerable amount of heat has to be dissipated via the cooling liquid. Accordingly, it can happen in a series connection that for the last roller devices in the corresponding series circuit possibly due to the already advanced heating of the cooling medium is no longer sufficient cooling capacity available. Accordingly, in the example of the 1, the media connection 40, which is provided inter alia for flowing through the cooling medium for the roller bearings 20, 22 and the cooling medium for the internal cooling of the roller elements 10, provided in the form of provided on the end face 12 connection, so that each roller device 1 via a separate Coolant supply for these primary cooling circuits has to be able to provide sufficient cooling capacity for each individual roller device.

Furthermore, it lends itself to the coming of a lubricant distributor lubricant supply per roller device 1 separately to each addressed roller bearings 20, 22 to come. Accordingly, in the embodiment shown in Figure 1, the connections for the lubricant distribution are placed on the end face 12 of the roller device. Figure 4 shows a schematic side view of a portion of a segment 100, wherein in the figure, the lot side of the segment is shown. A corresponding complementary device is provided on the fixed side, in which case also correspondingly seven roller devices are provided. This is also shown for example in FIG. 3, in which the loose side and the fixed side of the segment 100 are shown.

The segment 100 has a segmental framework 110, on which are mounted seven roller devices 1, which are similar to the roller device 1 shown in FIG. The respective media supply lines at the media connection 40 are not yet connected via the corresponding plugs or couplings in the state of the segment 100 shown in FIG. The further media connections are placed on the rear side of the respective roller device 1 so that they run within the segmental frame 110. The individual roller devices 1 are attached to the segment frame 1 10 each as a complete module. In other words, the individual must Roller units 1 are not assembled in their individual parts on the segment frame 1 10, but it can be mounted directly as a module on the segment frame 1 10 a pre-assembled roller device. After assembly of the roller devices 1 on the segmental frame 1 10 only a connection of the respective media supply lines and media discharges must be performed on the coupling means provided for this purpose.

In particular, the respective segment 100 can be constructed in that the roller devices 1 are fastened to the respective segmental frame 1 10 by bolting and / or screwing, wherein some of the media lines are already coupled to the segmental frame 1 10 by placing the roller device 1. Other media lines are connected to the respective roller devices 1 after placement by means of plug and coupling connections. Accordingly, a detailed separate external piping or cabling of the roller devices is eliminated. Of course, the piping and wiring of the segment scaffolding itself must still be executed and be present.

The proposed, compact roller devices 1 can now also casting machines with small casting radii, for example 4000 to 5000 mm form, the rollers and small roll diameter, for example, 120 mm to 180 mm, allow. Due to the simple coupling of the media from the back or from an end face of the roller devices, a connection of the media can be achieved even with these small radii. The small radii were previously not possible because accessibility to weld the respective media feeds was not given.

A possibly damaged roller device 1 within a segment 100 can be exchanged relatively easily and quickly, since here too only the respective coupling and coupling connections have to be removed and the modular roller device needs to be exchanged. The actual exchange of Roller means typically takes place after the entire segment in the respective casting has been replaced. The replacement of the roller device then takes place accordingly in the segment workshop. Furthermore, the so modular roller assemblies 1 can be kept in stock and replaced quickly and efficiently if necessary. In addition, the error rate during mounting is lower, since the roller devices are already self-contained systems that need only be connected to the appropriate coupling and coupling devices.

The reliability of the system and the efficiency of maintenance is further increased if each roller device 1 as a complete module, which primary cooling circuit, lubricant circuit, secondary cooling and data line devices can be completely assembled, pre-tested and pre-installed before installation. In particular, the Rollenplanlage can already be set in the module state, so that alignment and adjustment work when installing the respective roller device 1 in the segment frame 1 10 can be reduced to a minimum.

From the proposed construction further results that the reliability of each roller device can be significantly increased, since a separate piping can be completely or largely omitted, as well as a separate wiring. In particular, all media and data lines are guided within the roller device, which is a self-contained unit, especially when it is milled out of a solid material. LIST OF REFERENCE NUMBERS

1 roller inlet

5 10 roller element

12 end face of the roller device

20 center bearings

22 outdoor storage

24 connection section

10 26 face

30 footbridge

40, 42, 44 media connections

50 nozzle of secondary cooling 100 segment

15 1 10 Segment framework

Claims

claims

1 . Roller device (1), in particular for forming a strand-guiding segment (100) of a casting machine, comprising at least one roller element (10) mounted via roller bearings (20, 22), characterized in that two roller bearings are connected via a web (30 ) are interconnected.

2. Roller device (1) according to claim 1, wherein the web (30) comprises conduit means for at least two different media.

3. Roller device according to claim 1 or 2, wherein conduit means are provided for conducting at least one of the following media: a

Cooling medium for cooling the roller bearings (20, 22), a cooling medium for the roller internal cooling, a lubricant for lubricating the roller bearings (20, 22), a cooling medium for a secondary cooling, a hydraulic medium for a hydraulic control line, a compressed air medium for a pneumatic control line, a conduit medium for an electrical

Power supply, a line medium for electrical control signals, a conduction medium for electrical measurement signals, a conduction medium for optical measurement signals, or an electrical and / or optical bus system.

4. Rolleneinnchtung according to one of the preceding claims, wherein the roller bearings (20, 22) connecting portions (24) for direct connection to a segment frame (1 10).

5. Roller device according to one of the preceding claims, wherein the web (30) extends between mutually opposite end faces (26) of two roller bearings (20, 22).

6. Roller device according to claim 4 and 5, wherein the web (30) of the connecting portions (24) spaced from the respective end faces (26) is arranged, in particular between the connecting portions (24) and one by the circumference of the roller elements (10) defined Level.

Roller device according to one of the preceding claims, wherein the web (30) extends parallel to the axis of the roller element (10).

8. Roller device according to one of the preceding claims, wherein the web (30) with the roller bearings (20, 22) welded, screwed or glued and / or is flanged.

9. Roller device according to one of the preceding claims, wherein at least one media guide in the roller bearings (20, 22) is provided, wherein the at least one media guide with at least one conduit means of a web (30) communicates.

10. Roller device according to claim 9, wherein a conduit means of a first web (30) with a conduit means of a second web (30) via a media guide in a roller bearing (20, 22) communicates.

5

1 1. Roller device (1) according to one of the preceding claims, wherein at least one conduit means in the form of a bore in the web, in particular a deep hole, in the form of a with at least one

A cover of closable channel in the web, in the form of a reclosed channel, in the form of an open channel, in the form of a silicone sealed channel, in the form of a media guide extending along the web and fixedly connected thereto and / or in the form of at least

15 a within the web (30) laid pipe is provided.

12. Roller device (1) according to one of the preceding claims, wherein at least one on an end face (12) of the roller device (1).

20 provided media port (40) communicates with at least one conduit means.

13. Roller device (1) according to one of the preceding claims, wherein 25 at least one on a longitudinal side and / or a back of the

Roller device (1) provided media port (42, 44) communicates with at least one conduit means.

Roller assembly (1) according to one of the preceding claims, wherein a

Media connection in such a manner on a longitudinal side of the roller device (1) it is provided that it can communicate with a corresponding media connection (42, 44) of an adjacent roller device (1) and in particular allows a direct coupling of the line device corresponding to the media connection in the two webs (30).

Roller device according to one of the preceding claims, wherein the roller device pre-assembled in the segment before the final assembly, a function is tested and aligned.