KR20110020937A - Modular strand guide roller - Google Patents

Abstract

It is an object of the present invention, in a strand guide roller constructed in a modular manner, to be retrofitted to a variety of continuous casting widths without considerable effort, starting from the core region of the strand guide roller itself and near its surface. The strand guide rollers have a cooling effect which improves the useful life of the strand guide rollers down to the region and allow relatively economical maintenance to be achieved. The object is, according to the invention, a first flow channel 11 arranged centrally within each roller module 2, 3, 4 and extending axially and a second flow arranged centrally and axially extending. A channel 12 is provided, flow channels 15, 16 are formed in the region near the surface of each roller module 2, 3, 4, and the connecting channels 17 are associated flow channels 15. Is connected to the independent first flow channel 11 and the connecting channels 18 are achieved by connecting the relevant flow channels 16 to the independent second flow channel 12.

Description

Modular strand guide rollers {MODULAR STRAND GUIDE ROLLER}

The invention provides a strand guide roller modularly configured for a strand guide device of a continuous casting system according to the features of the preamble of patent claim 1, a strand guide device according to the features of patent claim 13, and a strand guide device according to claim 14. It relates to a method of operation for operating.

Strand guide rollers are known from EP 1 485 218 B1, but starting from the object of the present invention, in particular in a continuous casting system, coolant supply of the support and / or feed rollers is rotatably mounted to a bearing journal in a bearing block at least at the end side. And a rotary joint for ejection. The water-cooled support and / or feed rollers comprise channels extending axially in the outer region and channels which open into these channels and which start from these channels back to the central distribution system. The central dispensing system consists of a central bore portion provided in the support and / or transfer roller and a tubular line disposed inside the support and / or transfer roller, the tubular line comprising a central feed channel for cooling water. Together with a ring channel for discharging the coolant.

The strand guide roller disclosed in the European publication consists of two or more roller sections, each roller section of which is mounted to the bearing at the end side. As such the end bearing mounting of the individual roller sections is expensive and requires considerable effort for the assembly and disassembly of the bearing units in the maintenance of the strand guide device.

In addition, the strand guide devices are not retrofitted to another casting machine width without significant effort due to the roller sections being mounted on the end side as described above.

From WO 2007/121821 A1 the strand guide rollers are known which consist of at least two roller sections as strand guide rollers of the strand guide device. On this strand guide roller the cast strand is guided by a continuous casting machine. According to this, the plug-in connection is formed between the two roller sections, and only the bearing formed as a non-divided single bearing is provided.

In addition to the series of advantages compared to the aforementioned European publications, there is a disadvantage that only one central flow channel extending substantially over the width of the strand guide roller for the coolant does not exert sufficient cooling effect of the strand guide roller. Especially in the region near the surface of the strand guide roller, the cooling necessary to reduce the wear caused by chemical and mechanical loads on the strand guide roller is not achieved. The centrally extending flow channel therefore preferentially cools the inner bearing race in the strand guide roller or the journal region of the roller section.

In addition, the internally cooled strand guide rollers known from WO 2004/094087 A1 and EP 1 646 463 B1 comprise a central rotating shaft and a plurality of roller sleeves mounted in a splined manner on the shaft, including integrated coolant channels. Include.

From practical experience, such strand guide rollers with roller sleeves not only satisfactorily cool the roller barrels, but also contain a large number of sealing members, thereby providing a service-friendly and safe operation solution. It is not known.

It is therefore an object of the present invention, in a strand guide roller constructed in a modular manner, to be adapted to various continuous casting widths without considerable effort, starting from the core region of the strand guide roller itself and reaching an area near its surface. To provide a strand guide roller having a cooling effect to improve the useful life of the strand guide roller.

It is also an object of the present invention to provide a strand guide roller which allows relatively economical maintenance to be achieved in a strand guide roller constructed in a modular manner.

It is also an object of the present invention to provide a strand guide device comprising said strand guide rollers in connection with an increase in useful life and simplified maintenance.

This object is achieved according to the invention through the features of patent claim 1 and the features of patent claims 13 and 14.

According to the features of patent claim 1, the strand guide roller provided in a modular configuration for the strand guide device of the continuous casting system,

At least one first roller module and a second roller module, wherein the two roller modules are arranged next to each other in the axial direction, the first roller module being centrally located at its tip facing the second roller module At least one first roller module and a second roller module, comprising a journal;

A central bearing disposed between the first and second roller modules for receiving and supporting the roller journal of the first roller module and formed of a non-divided single bearing;

A plug-in connecting portion formed between the second roller module and the roller journal of the first roller module for connecting the first and second roller modules in a plug-in manner with each other;

A centrally extending flow channel in the roller modules for delivering coolant, comprising the centrally extending flow channel consisting of a first independent flow channel and a second independent channel flow in accordance with the invention,

The first and second independent flow channels of each roller module are connected with flow channels formed in the region near the surface via connecting channels.

In a further embodiment of the invention, the flow channels formed in the region near the surface of each roller module are provided in a paired manner. The coolant in the first flow channel of the paired flow channels then flows in a direction opposite to the flow direction of the coolant flowing in the central elongated flow channels, the coolant in the second flow channel of the paired flow channels extending centrally. Flow in the flow direction of the coolant flowing in the mold flow channels. As a result, an open cooling circuit is formed in each roller module.

At one end of the pair flow channels a chamber is formed which deflects the coolant inside the first and subsequent roller modules. The chambers are hermetically sealed with the cover outward, thereby preventing the coolant from leaking out.

Further, each first flow channel of the paired flow channels is connected with the first central elongated flow channel through a corresponding first connecting channel, and each second flow channel of the paired flow channels is connected to the corresponding second connecting channel. Through a second central elongated flow channel.

In this connection, the connection is made in such a way that the first connecting channel connects the outlet inlet of the associated flow channel of the paired flow channels with the supply side outlet of the first central elongated flow channel, on the other hand the second connection. The channel is made in such a way as to connect the outlet side inlet of the second central elongate flow channel and the supply side outlet of the second associated flow channel of the paired flow channels.

By extending the flow channels according to the invention as above inside the roller module, not only is the core region and bearing region not only sufficiently cooled, but also the region near the surface is sufficiently cooled, as known from the prior art.

In a further embodiment of the invention, when a plug-in connection is made between the first and second roller modules, the second central extended flow channel of the first roller module and the first central extended flow channel of the second roller module are sleeves. The coolant can flow out of the second central extended flow channel of the first roller module and flow into the first central extended flow channel of the second roller module.

The second roller module and each additional roller module of the strand guide roller are formed in the same way as the first roller module with respect to the overall structure of the flow and connecting channels. For example for strand guide rollers comprising first and second roller modules, the first open coolant circuit is integrated into the common open coolant circuit together with the second open coolant circuit, the first coolant circuit being connected to the coolant supply, The second coolant circuit may be connected to the coolant outlet.

The use of the strand guide rollers constructed in a modular manner makes it possible, for the first time, to form a strand guide roller which is sufficiently cooled not only in the core region but also in the region near the surface, in accordance with various casting widths.

Based on the minimal axial dimension of the bearing gap between the individual roller modules, preferably only the clearly reduced or minimized bulging of the slab in the areas of the slab not supported by the strand guide rollers. Only the point at which it is caused is achieved.

By forming flow channels in accordance with the present invention, improved cooling of the strand guide roller as a whole is achieved, with the result of increasing the roller useful life and expanding the variety of steel species to be cast.

Furthermore, through the provision of a removable cover for the surrounding flow channels or chambers, the flow channels and chambers are preferably always accessible and washable.

In the case of helical arrangement of peripheral flow channels, the flow channels can be used arranged in groups, for example as multistage threads. In this case the first group may be used for the supply of coolant, and the second group may be used for the recovery of the coolant.

Different or alternating flow directions of coolant in adjacent strand guide rollers, adjacent roller segments or upper and lower frames of the segment contribute to the equalization of the cooling effect on the strand or slab.

Further advantages and features of the invention are taught from the dependent claims and the following description of the embodiments shown in the accompanying drawings.

1 is a cross-sectional view of a strand guide roller composed of three roller modules cut along the cutting line AA of FIG. 4.
FIG. 2 is an enlarged view of the “Z” section of FIG. 1 including flow and connecting channels that direct coolant flow from the core region to the region near the surface.
3 is a cross-sectional view of the strand guide roller cut and enlarged according to the cutting line DD of FIG. 1.
4 is a cross-sectional view of the strand guide roller cut along the cutting line BB of FIG. 1 and enlarged.
FIG. 5 is a schematic view of the second or center roller module in the “A” direction of FIG. 6.
6 is a longitudinal cross-sectional view of the second or central roller module of the strand guide roller cut along the cutting line CC of FIG. 5.
FIG. 7 is a side view of a second or central roller module of the strand guide roller according to FIG. 6.

The strand guide roller 1 shown in FIG. 1 is composed of a first roller module 2, a second roller module 3, and a third roller module 4. All roller modules are mounted with strand guide rollers according to the previously known document WO 2007/121821 A1, more precisely between the second or central roller module 3 and the inner roller journal 2.1 of the first roller module 2. Is connected by a first plug-in connection, and between the third roller module 4 and the internal roller journal 3.1 of the second or central roller module 3 by a second plug-in connection.

The inner roller journal 2.1 of the first roller module 2 is housed in a non-dividing central bearing 5, and the inner roller journal 3. 1 of the second or central roller module 3 is a non-dividing central bearing ( 6) is accommodated in. The two central bearings 5, 6 are preferably formed relatively short in their axial extension, so that the transition area 7 between the roller modules 2 and 3 and 3 and 4 is likewise relatively short. In this way, the bulging phenomenon of the cast metal strand (slab) is preferably minimized and clearly reduced.

The outer roller journal 2.2 of the roller module 2 of the strand guide roller 1 and the outer roller journal 4.1 of the roller module 4 are accommodated in the respective outer bearings 8, 9.

The second or center roller module 3 is not housed in the center bearing 5 and the third roller module 4 is not housed in the center bearing 6. As a connection between the relevant roller modules 2 and 3 and 3 and 4, for example, a plug-in connection is provided. In this regard, the roller modules 3 and 4 are at their own ends facing in the direction of the first roller module 2 or the second roller module 3, as can be best seen in FIG. 6, the recess 10. ). In this recess portion, a structural member 23 formed in a ring shape, for example, is rotatably inserted. Such an extension 2.1.1 or 3.1.1, which is rotated relative to the actual roller journal as an extension of the associated roller journal, can be connected in a formally fixed manner with the structural member 23. In this respect, further details of the shape fixed coupling or plug-in connection are not the subject of the present invention and thus are not discussed in detail here.

In addition, as can be seen from FIG. 1, the roller modules 2, 3, 4 respectively include first and second centrally extending flow channels 11 or 12. In this regard, the flow channel 11 of the roller module 2 may be connected to the coolant supply 13, and the flow channel 12 of the roller module 4 may be connected to the coolant discharge 14.

For comprehensive cooling of each roller module of the strand guide roller 1, that is to say not only cooling the core and bearing areas, but also cooling the areas near the surface, each of the roller modules comprises additional flow and connecting channels. do. These flow and connecting channels are provided in the centrally extending flow channels 11, which are provided inside each roller module 2, 3, 4 and finally inside each strand guide roller 1 formed according to the invention. 12) together to form one open cooling circuit.

To this end, as shown in FIG. 2, axially extending flow channels 15 in the region near the surface of such an outer edge which guide and support the metal strand as the outer edge of each roller module 2, 3, 4. , 16). These axially extending flow channels 15, 16 are connected to the centrally extending flow channels 11, 12 via the first connecting channels 17 and the second connecting channels 18, and one open type. Form a cooling circuit.

In this connection the cooling circuit, on the one hand, can be seen in the region near the surface, in a manner in which the flow channels 15, 16 are paired, on the one hand, more precisely inside each roller module 2, 3, 4. Is preferably distributed evenly on the outer edge, one side flow channel of the paired flow channels 15, 16 is connected to the supply side outlet 11. 1 of the flow channel 11 via a connecting channel 17. The other flow channel of the pair flow channels 15, 16 is formed in such a way that it is connected to the outlet inlet 12. 1 of the flow channel 12 via a connecting channel 18.

The paired flow channels 15, 16 are respectively sealed at the end side, individually or together by a cover 19 or 17, as best seen in FIGS. 2, 5, and 6, the closure being Pair flow channels are made in such a way as to connect with corresponding chambers 20 formed at the leading end in the associated roller module to ensure a change in the flow direction of the coolant.

Particularly preferably, in forming the cooling circuit as above, the connecting channels 17, 18 are oriented into the respective roller modules 2, 3, 4 in the direction of the coolant supply 13 at the journal side, and as such The outer circumferential surface of each roller module thus does not necessarily need to be machined in any mechanical machining process to form the sealing members and connecting channels provided. In the mounted state of the strand guide rollers, each second centrally extending flow channel 12 of the roller modules 2 and 3 is connected to each first center of the roller module 3 or 4 by means of a connecting sleeve 21. It is connected with the extended flow channel 11. Thereby the open cooling circuit of each roller module is integrated into one open cooling circuit of the strand guide roller 1.

In order to help a better understanding of the cooling circuit formed inside the strand guide roller 1, the flow direction of the coolant 22 from the coolant supply 13 to the coolant discharge 14 is shown in the direction arrows. Is shown.

The coolant 22 flowing into the flow channel 11 of the roller module 2 is introduced into the connecting channel 17 at the end side of the flow channel 11, and then flow channels 15, 16 arranged in pairs. In the flow channel 15. The coolant 22 is then guided into the flow channel 16 of the flow channels 15, 16 arranged in pairs at the end side of the flow channel 15, and then through the connecting channel 18 a second central extension. A discharge side inlet 12.1 of the die flow channel 12 is reached, and from this inlet, again through the connecting sleeve 21 to the first central elongated flow channel 11 of the roller module 3.

The additional flow path of the coolant 22 in the roller modules 3 and 4 consists of a flow path similar to the flow path shown in the roller module 2, so that further description of the flow path is excluded here. Can be.

In Fig. 2 the flow of the roller module 2 and the relevant configuration of the connecting channels are shown enlarged with the flow direction of the coolant along the “Z” section of Fig. 1. The same members in FIGS. 1 and 2 are denoted by the same reference numerals.

From the cross-sectional view shown in FIG. 3 according to the cutting line DD of FIG. 1, in addition to the area of the plug-in connection portion between the roller module 2 and the roller module 3, the roller module ( It is possible to see the flow channels 15 and 16 arranged in pairs in the region near the surface of 3) and extending in the axial direction. The flow channels formed in pairs here are flow channels 15 containing feed coolant 22 and flow channels 16 containing discharge coolant 22, respectively. The pair flow channels 15, 16 are connected to each other via respective chambers 20 provided in the roller module. Also shown in the roller journal 2.1 of the roller module 2 is a second centrally extending flow channel 12.

4 is a cross-sectional view of the roller module 3 comprising paired flow channels 15 and 16 disposed near the surface and a first flow channel 11 disposed centrally along the cutting line BB of FIG. 1. It is shown.

FIG. 5 shows the roller module 3 shown in FIG. 6 in a side view. The flow channels 15, 16 arranged in pairs in the region near the surface of the roller module 3 and extending in the axial direction are hermetically, preferably detachable, from the end side to the cover 17 of each cover or cavity. Sealed. Also shown is a centrally extending flow channel 11; 12 of the roller module 3.

The flow channel 11 is connected to the relevant flow channels 15 of the paired flow channels 15, 16 via connecting channels 17 extending at an acute angle, whereas the flow channel 12 extends at an acute angle. It is connected to the relevant flow channels 16 of the paired flow channels 15, 16 through the connection channels 18.

FIG. 6 shows a longitudinal section along cut line C-C in FIG. 5. Here again a roller module 3 comprising a roller journal 3. 1 and an extension 3.1.1 arranged in this extension and preferably formed in a polygon in the extension of the roller journal 3. Is shown.

In addition to the structure of the flow and connecting channels already described in detail above, the roller module 3 comprises a recess 10 located at the tip facing in the opposite direction of the roller journal 3.1. An annular structural member 23 is inserted in the recess 10, which is fixed so as not to rotate by suitable fastening means 24, for example a fastening pin. In this connection the interior of the annular structural member 23 has a corresponding cross section, for example a polygonal cross section, corresponding to the cross sectional shape of the extension 2.1.1 of the roller journal 2.1. To the recess 10 a receiving bore 25 for the sleeve 21 is connected at the inlet side of the central flow channel 11 (see FIG. 1). In this connection the receiving bore 25 has a larger diameter than the diameter of the centrally extending flow channel 11. The extension 3.1.1 of the roller journal 3.1 of the roller module 3 also includes a receiving bore 26 with the same purpose.

FIG. 7 shows another side view of the roller module 3 shown in FIG. 6. In the region near the surface, similar to the structure according to FIG. 5, paired flow channels 15, 16 are arranged around the flow channel 11 or 12 and are sealed by a sealing cover 19. The chamber 20 shown only in FIG. 6 connects two flow channels 15, 16 arranged in pairs, whereby the flow of coolant 22 in the chamber 20 is deflected.

The side view also shows the polygonal structure of the extension 3.1.1, the receiving bore 26 for the sleeve 21, and the centrally extending flow channels 12; 11.

1: strand guide roller
2: roller module
2.1: internal roller journal
2.1.1: Extension
2.2: outer roller journal
3: roller module
3.1: roller journal
3.1.1: Extension
4: roller module
4.1: Outer roller journal
5: central bearing
6: central bearing
7: transition area
8: outer bearing
9: outer bearing
10: recess
11: flow channel
11.1: Supply side outlet
12: flow channel
12.1: outlet inlet
13: coolant supply
14: coolant outlet
15: flow channel
15.1: outlet inlet
16: flow channel
16.1: supply-side outlet
17: connecting channel
18: connecting channel
19: cover
20: chamber
21: sleeve
22: refrigerant
23: structural member
24: fastening means
25: accommodation bore
26: receiving bore
27: airtight cover

Claims (14)

As a modular strand guide roller (1) for strand guide devices in a continuous casting system,
The strand guide roller 1,
In at least one of the first and second roller modules 2, 3 arranged side by side in the axial direction, the first roller module 2 is centrally located at its tip facing the second roller module 3. Said at least one first and second roller modules (2, 3) comprising a roller journal (2.1),
A central bearing (5) disposed between the first and second roller modules (2, 3) for receiving and supporting the roller journal (2.1) of the first roller module (2);
A plug-in formed between the second roller module 3 and the roller journal 2.1 of the first roller module 2 for plugging the first and second roller modules 2, 3 into each other. With connections,
Comprising a flow channel extending axially from the center in the roller modules 2, 3 to deliver coolant 22,
In the strand guide roller 1,
The flow channel disposed centrally and extending in the axial direction is composed of a first independent flow channel 11 and a second independent flow channel 12,
Flow channels 15, 16 are formed in the region near the surface of such an outer edge that guides and supports the metal strand as the outer edge of each roller module 2, 3, and
First connection channels 17 connect the first independent flow channel 11 and the associated flow channels 15, and the second connection channels 18 connect with the second independent flow channel 12. Strand guide roller, characterized in that for connecting the associated flow channels (16). 2. The strand guide roller of claim 1 wherein the flow channels (15, 16) are provided in a paired manner. 3. The strand guide roller according to claim 2, wherein at least one end of each of said pair of flow channels (15, 16) is formed with a chamber (20) for deflecting coolant (22). 4. The flow channels according to claim 3, wherein the flow channels (15, 16) and the chambers (20) are hermetically sealed with their own annular cover or cavity annular cover (19, or 27) outwards, Preferably, the strand guide roller is detachably sealed. The method of claim 2,
Relevant flow channels 15 of the paired flow channels 15, 16 are connected to respective first flow channels 11 via the connection channels 17,
The associated flow channels (16) of the paired flow channels (15, 16) are connected with respective second flow channels (12) via the connecting channels (18). 6. The connecting channel (17) according to claim 5, wherein each connecting channel (17) is a discharge side inlet (15.1) of the associated flow channel (15) of the paired flow channels (15, 16) and a supply side of the first flow channel (11). Strand guide roller, characterized in that for connecting the outlet (11.1). 6. The connecting side (18) of claim 5, wherein each connecting channel (18) is a supply side of the outlet side inlet (12.1) of the second flow channel (12) and the associated flow channel (16) of the paired flow channels (15, 16). Strand guide roller, characterized in that it is connected to the outlet (16.1). The flow channel 11 of the first roller module 2 is connected to a coolant supply 13 and the second flow channel 12 of the associated roller module is connected to a coolant discharge 14. A strand guide roller, characterized in that. 2. The second flow channel (12) of the second roller module (2) is connected to the first flow channel (11) of the second roller module (3) via the sleeve (21). Strand guide roller made. 10. Strand guide roller according to any of the preceding claims, characterized in that the flow direction of the coolant (22) can be reversed. 11. The method according to any one of the preceding claims, wherein the first and second independent flow channels (11, 12) are each formed as sections of the same central flow channel and separated from one another only by means of a blocking part, for example a stopper. Strand guide roller, characterized in that the. 12. The flow channel according to any one of the preceding claims, characterized in that the flow channels (15, 16) are formed in the region near the surface of the roller modules parallel to the axis, spirally, or in the form of an annular slot. Strand guide roller. A strand guide device for metal strands exiting a mold of a continuous casting system,
The strand guide device comprises at least one strand guide roller (1) consisting of a first roller module (2) and a second roller module (3), wherein the strand guide roller (1) comprises at least one of claims 1 to 12. A strand guide device, characterized in that it is formed according to the features of the claims. In the operating method for operating the strand guide device according to claim 13,
The coolant in adjacent strand guide rollers, adjacent roller segments or upper and lower frames of the segment, respectively, flowing in opposite directions to each other.

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