JP6728526B2 - Roll stand equipped in continuous casting equipment - Google Patents

Description

The present invention relates to a roll stand provided in a continuous casting facility in which a plurality of strands are arranged.

Generally, in continuous casting equipment, molten steel carried by a ladle is poured into a tundish, and the poured molten steel is poured into a mold through the tundish. The poured molten steel is drawn out from the lower part of the mold as a cast piece, and the cast piece is further drawn to the downstream side while being held by a guide roll provided in a roll stand (cast piece guide device). In such a continuous casting facility, a plurality of slab transfer paths (strands) are provided.

By the way, each strand is provided with a roll stand divided into segments, that is, a plurality of roll segments. Each of these roll segments can be individually moved and unloaded at the time of maintenance such as regular inspection, replacement and repair.
Devices for exchanging such roll segments include those disclosed in Patent Documents 1 to 3.

In Patent Document 1, in a continuous casting facility for a plurality of strands in which a plurality of vertical type strands in which a secondary cooling roll device is vertically arranged immediately below a mold are arranged adjacent to each other, each segment of the secondary cooling roll device having different floor levels On the other hand, each of the independent transverse carriages is provided, and the transverse carriage is movable in the lateral direction of the strand to be shared by a plurality of strands, and the guide rail for pulling out the segment is provided on the transverse carriage to provide the secondary cooling roll device. A segment changer in a continuous casting facility is disclosed which is intended to be configured to smoothly connect with the rail on the side beam.

Patent Document 2 discloses a segment exchanging device of a vertical continuous casting facility including a plurality of segments constituted by a plurality of guide rolls below a mold, in at least one segment of a slab guide device having different floor levels, A rotating shaft of a tilting beam that is rotatable in the vertical direction is axially supported by a support frame on the side facing the slab guide device, and a guide rail that can pull out or pull in the segment is provided on the tilting beam. The guide rail and the fixed rail on the support frame on the slab guide device side are configured to be smoothly connected directly or via an intermediate member, and the tilting beam is rotated when the segment is pulled out or pulled in. By placing the free end portion of the tilting beam on the supporting frame on the slab guide device side, the intermediate member, or the machine receiving beam fixed on the supporting frame, the guide rail on the tilting beam is substantially horizontal. Disclosed is a segment exchange device for continuous casting equipment intended to be held in a state.

Patent Document 3 discloses a continuous casting facility in which a slab is pulled out from a mold along a casting line, and an elevator that can be elevated and lowered along the casting line, and a carriage that is horizontally movable on the elevator. And pulling a predetermined roll segment that constitutes the casting line onto the lift table by the carriage, and conversely, a roll segment on the lift table for the purpose of pushing into the casting line. A roll segment changing device in a casting facility is disclosed.

Japanese Utility Model Publication No. 61-42667 JP, 2011-104621, A JP-A-11-277203

By the way, referring to FIG. 1 of Patent Document 1, each roll segment is arranged one by one on the upper surface of each beam member 6A to 6F, and a predetermined space exists above each roll segment. Further, referring to FIG. 1 of Patent Document 2, the arrangement of each roll segment is similar to that of Patent Document 1, and there is a predetermined space above each roll segment.
Therefore, in Patent Documents 1 and 2, since each roll segment has a non-laminated structure in which one roll segment is provided in each layer, a beam receiving beam provided so as to cross (intersect) the beam member. (For example, in Patent Document 1, without interfering with the beam members illustrated below, such as 6C and 6E, in Patent Document 2, without supporting frame such as 18 illustrated below such as 10 and the like, Each roll segment can be easily loaded and unloaded (moved).

By the way, in the continuous casting equipment, at the place where the drawn slab becomes the final stage of solidification, in order to continuously reduce the solidification shrinkage part of the slab, multiple roll segments such as a slab drawing stand and a light reduction stand are used. A vertical roll stand configured by vertically stacking (connecting) is used.
The vertical roll stand having the above-mentioned laminated structure is a heavy object, and in order to support it, a beam member sandwiching and supporting it from the left and right directions is required. Since this beam member needs to be supported by the structure of a doubly supported beam in order to carry a heavy load, a pair of front and rear beam receiving beams are provided in a direction transverse to the beam member, and this beam receiving beam is used to support the beam member from below. The beam member is supported.

However, for the purpose of periodic inspection, maintenance such as replacement and repair, when removing each roll segment and carrying it out from the slab conveyance path (online), if the roll segment is moved forward, the roll segment The upper part of the beam interferes with the beam receiving beam and cannot be easily moved. For example, the roll segment may interfere with a beam member illustrated below in FIGS. 1C and 6E of FIG. 1 of Patent Document 1, a base beam such as 18 and 19 of FIG. 1 of Patent Document 2, and the like. There is.

Since the roll segment is a heavy object in the first place, it is impossible in operation to lay it down or tilt it to move it. Further, since the beam receiving beam on the front side is installed in the building, it cannot be removed. On the other hand, when the roll segment after maintenance is carried in online, the beam receiving beam becomes an obstacle and the roll segment cannot be arranged at an appropriate position online.

Particularly in continuous casting equipment for special steel, a light reduction stand is always used in order to improve the quality of the inside of the slab, and the reduction position of the light reduction stand is a very important technical element. Therefore, in the online light reduction stand, if the proper reduction amount and the appropriate reduction amount at the final stage of solidification of the slab are not used, the quality of the slab may be deteriorated.
That is, the inability to freely arrange the light reduction stand (reduction roll) may be a drawback in improving the quality of the cast slab.

By the way, it is possible to load and unload roll segments in the left and right direction, but since multiple strands are arranged adjacent to each other in the left and right direction in continuous casting equipment, loading and unloading roll segments in the left and right directions is The roll stand of the stand that interferes is extremely difficult.
Although FIG. 10 of Patent Document 3 discloses a vertical roll stand configured by stacking a plurality of roll segments, since no beam member or beam receiving beam is described, what structure is used? It is unknown whether or not the roll segment and the beam receiving beam interfere with each other in this equipment.

Therefore, in view of the above problems, the present invention provides a continuous casting facility in which the roll segment can be easily replaced without interfering with the beam receiving beam arranged in the direction transverse to the beam member facing the front direction. The purpose of the present invention is to provide a rolled roll stand.

In order to achieve the above-mentioned object, the following technical measures are taken in the present invention.
The roll stand provided in the continuous casting equipment according to the present invention is a roll stand provided in the continuous casting equipment, which is arranged on the floor surface and in which a plurality of vertically extending strands are arranged in the left and right directions, Each strand has a roll stand configured by laminating a plurality of roll segments each having one or more pair of rolls in the vertical direction, and at least one of the roll segments extends in the front-rear direction and to the left and right. A pair of first beam members disposed above the floor surface or supported by a second beam member disposed above the first beam member are provided, and the first beam member is supported. Is supported by a first beam receiving beam provided so as to traverse the front side of the roll segment being supported in the left-right direction, and the second beam member is provided on the right side of the front side of the supporting roll segment. The height dimension of the roll segment, which is supported by a second beam receiving beam provided so as to cross in the direction, and is present between the first beam receiving beam and the floor surface, is the first dimension. The height dimension of the roll segment existing between the second beam receiving beam and the first beam receiving beam, which is smaller than the lower surface of the beam receiving beam and the floor surface, It is smaller than the lower surface of the beam receiving beam and the upper surface of the first beam receiving beam .

Preferably, the roll segment is a light pressure stand.
Preferably, a spacer may be inserted into the roll segment supported by the beam member and the dividing surface of the roll segment provided below the roll segment.

According to the present invention, the roll segment can be easily moved without interfering with the beam receiving beam provided in a direction transverse to the beam member facing the front direction.

It is the side view which showed the outline of the roll stand with which the continuous casting equipment concerning this invention was equipped. It is the figure which looked at the roll stand with which the continuous casting equipment concerning this invention was equipped from the front, and is an AA arrow view of Drawing 1. It is a partially expanded view of FIG. It is the figure which showed the exchange method of the roll segment in 1st Example (CASE1). It is the figure which showed the exchange method of the roll segment in 2nd Example (CASE2). It is a figure which shows schematic structure of a vertical type continuous casting equipment.

Embodiments of the present invention will be described below with reference to the drawings.
Before describing the roll stand 16 according to the present invention, the continuous casting equipment 1 provided with the roll stand 16 according to the present invention will be described below.
The continuous casting equipment 1 according to the present embodiment is a vertical type continuous casting equipment which is arranged on the floor surface F and in which a plurality of strands are arranged. In addition, in this embodiment, as shown in FIG. 2, the continuous casting equipment 1 in which three vertically extending strands are provided in the left and right direction will be described as an example. Is not limited. In addition, in FIG. 1 strand-No. We will call it 3 strands.

As shown in FIG. 6, a vertical-type continuous casting facility 1 in which three vertically extending strands are provided includes a tundish 2 for temporarily storing molten steel 4, a mold 3 for casting molten steel 4, and a mold. And a roll stand 16 provided with a plurality of rolls 6 (guide rolls) for supporting and transporting the cast slab 5 (bloom, billet, slab) coming out of FIG.
The roll stand 16 is a device in which a plurality of the pair of rolls 6 are vertically arranged inside and the height of the roll stand 16 is vertical. 1-No. It is deployed on each of the three strands. The roll stand 16 has a structure in which a plurality of roll segments 17 are vertically stacked.

In the continuous casting facility 1 having such a configuration, the molten steel 4 carried by the ladle 7 is poured into the tundish 2, and the poured molten steel 4 is cast through the dipping nozzle 8 provided in the tundish 2 into the mold. Injected into 3. In the mold 3, the poured molten steel 4 is cooled, and the surface portion thereof becomes a solidified slab 5, which is held by the roll 6 in the roll stand 16 and is vertically pulled out from the lower part of the mold 3 to be downstream. Be transported to.

In the following description, the left side of the paper of FIG. 1 is the front side and the right side of the paper is the rear side. Further, in the paper penetration direction of FIG. 1, the front side is the right side and the back side is the left side.
As shown in FIGS. 1 to 3, a beam member 9 is provided in order to dispose the roll stand 16 at a predetermined position in the horizontal direction.
The beam members 9 are provided on both left and right sides of the roll segment 17 so as to sandwich at least one of the vertically stacked roll segments 17, and are provided so as to project from the left and right side walls of the roll segment 17. By supporting the overhanging portion 24, the roll segment 17, and thus the roll stand 16, is fixed at a predetermined position in the vertical direction.

It should be noted that FIGS. 1 and 2 are shown by focusing on two places vertically provided from the floor F (placement surface) of the building, and are provided above the floor F of the building. The beam member 9 is a first beam member 10 (mounting surface), and the beam member 9 provided above the first beam member 10 is a second beam member 11 (mounting surface). Although not shown, a plurality of beam members are provided above the second beam member 11.

On the other hand, a beam receiving beam 12 for supporting the above-mentioned beam member 9 is provided in a building where the continuous casting facility 1 is installed indoors. The beam receiving beam 12 is a beam that constitutes a building and is provided so as to extend in the left-right direction inside the building.
One beam receiving beam 12 is provided below the front end of the beam member 9 so as to cross the front side of the roll segment 17 supported by the beam member 9 in the left-right direction. Further, one beam receiving beam 15 is provided below the rear end of the beam member 9 so as to cross the rear side of the roll segment 17 in the left-right direction. The beam member 9 has a double-supported beam structure (both-end support beams) by the beam receiving beams 12 and 15 provided in front and rear.

Hereinafter, in this embodiment, the beam receiving beam 12 provided on the front side will be focused and described.
The front beam receiving beam 12 is a reinforced concrete structure having a rectangular cross section, and a plurality of beam receiving beams 12 are provided at predetermined intervals in the vertical direction from the floor surface F of the building. For example, as shown in FIGS. 1 and 2, two beam receiving beams 12 are provided in the vertical direction at predetermined intervals.
Here, the beam receiving beam 12 provided above the floor surface F of the building shown in FIGS. 1 and 2 is referred to as a first beam receiving beam 13, and is provided above the first beam receiving beam 13. The beam receiving beam is referred to as a second beam receiving beam 14.

That is, the first beam member 10 is supported by the first beam receiving beam 13 provided so as to cross the front side of the supporting roll segment 17 in the left-right direction. Further, the second beam member 11 is supported by a second beam receiving beam 14 which is provided so as to cross the front side of the supporting roll segment 17 in the left-right direction. Although not shown, a plurality of beam receiving beams are provided above the second beam receiving beam 14.

The beam receiving beam 15 on the rear side is a beam member having substantially the same configuration as the beam receiving beam 12 on the front side, and detailed description thereof will be omitted.
After that, the space between the floor surface F of the building and the first beam receiving beam 13 above it is defined as the first floor of the building, and the first beam receiving beam 13 and the second beam receiving beam 14 above it are separated. The space is the second floor of the building.
Next, the roll stand 16 (cast piece guide device) according to the present embodiment will be described with reference to the drawings.

As shown in FIGS. 1 and 2, a plurality of roll stands 16 are arranged in the left-right direction. 1-No. Each of the three strands is configured. The roll stand 16 is a device that is divided into a plurality of pieces in the flow direction of the cast slab 5, that is, a device that is formed by stacking a plurality of roll segments 17 having one or more pair of rolls 6 in the vertical direction. Is.
At least one of the roll segments 17 extends in the front-rear direction and is provided in a pair on the left and right, and is a first beam member 10 arranged above the floor surface F or a first beam member 10 arranged above the first beam member 10. It is supported by two beam members 11.

The roll stand 16 according to the present embodiment is a device that is configured by stacking four roll segments 17 in the vertical direction. The four roll segments 17 are referred to as a first roll segment 18, a second roll segment 19, and a third roll segment 20 from the bottom, and the uppermost stage is referred to as a fourth roll segment 21. When these roll segments 18 to 21 are exchanged (carried in/carried out) for maintenance or the like, they are moved in the front-rear direction so as to cross the beam receiving beam 12 (the beam receiving beam on the front side). Has been done.

Further, in the present embodiment, the first roll segment 18 holds a cast piece 4 conveyed from the mold 3 and pulls it out, and a pair of front and rear pinch rolls 22 is provided as a cast piece pulling stand arranged in plural vertically. It is adopted. A rotational drive force is applied to the pinch roll 22 by a drive device (not shown).
The first roll segment 18 is a tall segment, and the lower part thereof is fixedly provided on the floor surface F of the building. A second roll segment 19 is provided on the upper part of the first roll segment 18, and the upper part of the first roll segment 18 and the lower part of the second roll segment 19 are fixed via a fastener 30. A third roll segment 20 is provided above the second roll segment 19.

The third roll segment 20 is formed with overhanging portions 24 on the lateral wall in the left-right direction, and is reliably supported by the first beam member 10 via the overhanging portions 24. The lower part of the third roll segment 20 is located on the first floor, and the middle part to the upper part in the vertical direction is located on the second floor. That is, the third roll segment 20 is a tall segment arranged so that the lower part thereof straddles the first floor upper part and the second floor. It should be noted that the hierarchy in which the third roll segment 20 is provided is the second floor for convenience.

A predetermined space 28 (gap) is formed between the lower surface of the third roll segment 20 and the upper surface of the second roll segment 19. The gap 28 is a space for “escape” in the vertical direction when the first roll segment 18 and the second roll segment 19 are carried in and out of the first floor. That is, the third roll segment 20 is in a suspended state with respect to the second roll segment 19 via the overhang portion 24.

On the other hand, the fourth roll segment 21 is provided on the upper part of the third roll segment 20, and the upper part of the third roll segment 20 and the lower part of the fourth roll segment 21 are fixed via the fastener 30. A predetermined space 36 (gap) is formed between the upper portion of the fourth roll segment 21 and the lower surface of the second beam member 11. The gap 36 is a space for "escape" in the vertical direction when the third roll segment 20 and the fourth roll segment 21 are carried in and out of the second floor.

In addition, in the present embodiment, the second roll segment 19 to the fourth roll segment 21 are provided with a plurality of front and rear support rolls 23 (guide rolls) that apply a predetermined amount of reduction to the cast slab 4. The light pressure stand is used. The support roll 23 is a free roll that is merely pressed against the slab 4 and is not given a rotational driving force.

The pass line (conveyance path) of the slab 4 formed by the support roll 23 and the pinch roll 22 is substantially straight in the hanging direction.
The first roll segment 18 is detachable from the floor surface F when performing maintenance, and the second roll segment 19 to the fourth roll segment 21 are also detachable.

1 to 3 are diagrams schematically showing the roll segments 18 to 21, and the shapes of the roll segments 18 to 21 and the pinch rolls 22 and the support rolls 23 in the roll segments 18 to 21 are shown. The deployment number of is arbitrary.
Next, the position of the dividing surface in the roll stand 16 in which a plurality of roll segments 17 are laminated, which is a feature of the present invention, will be described in detail.

In the present embodiment, the roll segment 17 can be divided in the vertical direction at a position which is a midway portion in the vertical direction of the roll segment 17 and lower than the lower surface of the beam receiving beams 13 and 14 (described below). A first dividing surface 25 and a third dividing surface 27) are provided.
In this case, the roll segment 17 on the lower side of the dividing surface is the first roll segment 18 or the third roll segment 20, and the roll segment 17 on the upper side of the dividing surface is the second roll segment 19 or the fourth roll segment 21. ..

In addition, a dividing surface (second dividing surface 26 described below) that can divide the roll segment 17 in the vertical direction is provided at a position midway in the vertical direction of the roll segment 17 and higher than the upper surface of the beam receiving beam 13. It is provided.
In this case, the roll segment 17 on the lower side of the dividing surface is the second roll segment 19, and the roll segment 17 on the upper side of the dividing surface is the third roll segment 20.

As shown in FIGS. 1 and 2, between the floor surface F and the first beam receiving beam 13, that is, on the first floor, the first roll segment 18 and the second roll segment 19 are stacked and arranged, The first split surface 25, which is a horizontal split surface (joint surface) between the upper surface of the first roll segment 18 and the lower surface of the second roll segment 19, is located below the lower surface of the first beam receiving beam 13. positioned.

Moreover, in the 1st floor to the 2nd floor, the 2nd roll segment 19 and the 3rd roll segment 20 are laminated|stacked and arrange|positioned at a predetermined space|interval, and the upper surface of the 2nd roll segment 19 and the 3rd roll segment. The second split surface 26, which is a horizontal split surface between the lower surface of 20 and the lower surface of 20, is located above the upper surface of the first beam receiving beam 13.
Between the first beam receiving beam 13 and the second beam receiving beam 14, that is, on the second floor, the third roll segment 20 and the fourth roll segment 21 are laminated and arranged, and A third dividing surface 27, which is a horizontal dividing surface between the upper surface and the lower surface of the fourth roll segment 21, is located below the lower surface of the second beam receiving beam 14.

In other words, the length of at least one roll segment 17 in the height direction is between the lower surface of the first beam receiving beam 13 and the floor surface F, or the lower surface of the second beam receiving beam 14 and the first beam receiving beam 14. It can be said that it is smaller than the distance between the beam receiving beam 13 and the upper surface.
As described above, by making the first split surface 25 lower than the lower surface of the first beam receiving beam 13, the upper portion of the first roll segment 18 does not interfere with the lower surface of the first beam receiving beam 13, It is possible to easily move the roll segments 18 and 19 in the front-rear direction.

Further, by making the second split surface 26 higher than the upper surface of the first beam receiving beam 13, the lower portion of the third roll segment 20 does not interfere with the upper surface of the first beam receiving beam 13, and By making the dividing surface 27 lower than the lower surface of the second beam receiving beam 14, the upper portion of the third roll segment 20 does not interfere with the lower surface of the second beam receiving beam 14, so that the respective roll segments 19 to 21. Can be easily moved in the front-back direction.

A gap 28 is formed in the second split surface 26 between the lower surface of the third roll segment 20 supported by the first beam member 10 and the upper surface of the second roll segment 19 provided below the third roll segment 20. The spacer 29 is formed and the spacer 29 is inserted into the gap 28. Although the spacer 29 is a cotter in this embodiment, a flat liner may be used, or a bolt may be provided on either the second roll segment 19 or the third roll segment 20, and the tip of the bolt may be brought into contact with the other side. It may be a structure. That is, as long as the second roll segment 19 and the third roll segment 20 are in contact with each other via the spacer 29, the shape of the spacer 29 is not particularly limited.

The pull-out force during casting causes pull-out resistance of the third roll segment 20 and the fourth roll segment 21 to act in the downward direction, and a large force acts on the first beam member 10. Therefore, by inserting the spacer 29 into the gap 28 of the second split surface 26, the second roll segment 19 and the third roll segment 20 come into contact with each other via the spacer 29, and the third roll segment 20 is suspended and supported. Therefore, the force acting on the first beam member 10 becomes an internal force of the first roll segment 18 to the fourth roll segment 21, and a large external force acts on the beam receiving beam 12, the floor surface F, and the like. Can be avoided. Therefore, it is possible to suppress the bending of the beam members 10 and 11, the beam receiving beams 13 and 14, and the displacement of the roll segments 18 to 21 from the predetermined positions.

Further, for example, even if there is a problem that a foreign matter is caught in the support roll 23 of the fourth roll segment 21 for some reason, the internal force of the first roll segment 18 to the fourth roll segment 21 is generated, and thus each beam member 10 is provided. , 11, and each beam receiving beam 13, 14, 15 is not damaged. The spacer 29 is removable, and when the spacer 29 is removed, a gap is created between the second roll segment 19 and the third roll segment 20, so that the second roll segment 19, the first roll segment 18, and the third roll segment The roll segment 20 can be easily loaded and unloaded.

Next, a method of loading and unloading the roll stand 16 on which the above-described roll segments 17 are stacked will be described with reference to the drawings.
[Example 1]
First, a method of loading the roll segments 18 and 19 into the space between the floor surface F of the building and the first beam member 10, that is, the first floor of the building, according to the procedure of CASE 1 (1) to (9) shown in FIG. ,explain.

The third roll segment 20 and the fourth roll segment 21 are arranged on the pass line of the cast slab 4.
In CASE1(1), in front of the first beam receiving beam 13, the second roll segment 19 is hoisted by the overhead crane 34, and the hoisted state is gradually lowered and lowered to the first floor, and then on the floor surface F. It is placed on a trolley 31 that is capable of traveling in the front-rear direction on the laid rail 33.

In CASE 1(2), the carrier truck 31 on which the second roll segment 19 is placed is moved from the front side of the first beam receiving beam 13 in the pass line direction of the cast slab 4. The second roll segment 19 is arranged while adjusting the support roll 23 of the second roll segment 19 so as to be positioned on the pass line of the slab 4.
In CASE1(3), the second roll segment 19 arranged on the pass line of the slab 4 is lifted again by the overhead crane 34.

In CASE1(4), the second roll segment 19 is lifted by the overhead crane 34 until a predetermined gap is formed between the second roll segment 19 and the lower surface of the third roll segment 20. After hoisting, the carriage 31 is returned to the original position.
In CASE1(5), the upper portion of the second roll segment 19 and the lower portion of the third roll segment 20 are temporarily temporarily fixed by the fixing member 35 or the like.

In CASE 1 (6), the first roll segment 18 is lifted by the overhead crane 34 on the front side of the first beam receiving beam 13, and is gradually lowered from the lifted state and placed on the floor surface F.
In CASE1 (7), the first roll segment 18 is gradually moved from the front side of the first beam receiving beam 13 in the pass line direction of the slab 4. Then, the first roll segment 18 is arranged while adjusting the pinch roll 22 of the first roll segment 18 so as to be positioned on the pass line of the slab 4.

At this time, since the first dividing surface 25 is lower than the lower surface of the first beam receiving beam 13, the upper portion of the first roll segment 18 does not interfere with the lower surface of the first beam receiving beam 13. Therefore, the first roll segment 18 can be easily moved in the pass line direction of the slab 4.
In CASE1 (8), the temporary fixing member 35 is released, the second roll segment 19 is placed on the upper portion of the first roll segment 18, and the first roll segment 18 and the second roll segment 18 and The roll segment 19 is fixed.

In CASE1 (9), the spacer 29 is inserted into the gap 28 formed in the second divided surface 26.
The above is No. It is a method of carrying in the first roll segment 18 and the second roll segment 19 in the three strands.
In addition, No. 1 strand, No. The same applies to the two strands. In addition, as a method of unloading the first roll segment 18 and the second roll segment 19, the procedure of CASE1 may be reversed, that is, CASE1(9) to CASE1(1) may be carried out in this order.
[Example 2]
Next, a procedure of CASE 2 (1) to (12) shown in FIG. 5 is a method of loading the roll segments 19 to 21 into the space between the first beam member 10 and the second beam member 11, that is, the second floor of the building. Follow the instructions below.

In addition, the 1st roll segment 18 shall be arrange|positioned on the pass line of the slab 4.
In CASE2(1), in front of the second beam receiving beam 14, the second roll segment 19 is hoisted by the ceiling crane 34, and the hoisted state is gradually lowered and lowered to the second floor, and the first beam member. A rail 33 laid on the rail 10 is placed on a carrier truck 32 that can travel in the front-rear direction.

In CASE2(2), the carrier truck 32 on which the second roll segment 19 is placed is moved from the front side of the second beam receiving beam 14 in the pass line direction of the slab 4. The second roll segment 19 is arranged while adjusting the support roll 23 of the second roll segment 19 so as to be positioned on the pass line of the slab 4.
In CASE2(3), the second roll segment 19 arranged on the pass line of the slab 4 is lifted by the overhead crane 34 and lowered. After hoisting here, the carriage 32 is returned to its original position.

In CASE2(4), the second roll segment 19 is arranged on the upper part of the first roll segment 18, and is fixed using the fastener 30 or the like.
In CASE2(5), the fourth roll segment 21 is lifted by the overhead crane 34 on the front side of the second beam receiving beam 14 and gradually lowered from the lifted state, and then conveyed on the first beam member 10. It is placed on the dolly 32.

In CASE2 (6), the fourth roll segment 21 is moved from the front side of the second beam receiving beam 14 in the pass line direction of the slab 4. Then, the fourth roll segment 21 is arranged while adjusting the support roll 23 of the fourth roll segment 21 so as to be positioned on the pass line of the slab 4.
In CASE 2 (7 ), the fourth roll segment 21 is lifted by the overhead crane 34 until a predetermined space is provided with respect to the lower surface of the second beam receiving beam 14.

In CASE 2 (8), the upper portion of the fourth roll segment 21 and the second beam member 11 are temporarily fixed by the fixing member 35 or the like. After hoisting here, the carriage 32 is returned to its original position.
In CASE2(9), on the front side of the second beam receiving beam 14, the third roll segment 20 is hoisted by the overhead crane 34, and from the hoisted state, the lower portion overlaps with the first beam receiving beam 13. Gradually lower.

In CASE 2 (10), when the overhanging portion 24 of the third roll segment 20 comes into contact with the rail 33 arranged on the second floor, the overhead crane 34 is removed to fix the third roll segment 20 to the second beam receiving beam. From the front side of 14, the slab 4 is moved in the pass line direction.
At this time, since the second divided surface 26 is higher than the upper surface of the first beam receiving beam 13 and the third divided surface 27 is lower than the lower surface of the second beam receiving beam 14, the third roll segment 20 The lower portion does not interfere with the upper surface of the first beam receiving beam 13, and the upper portion does not interfere with the lower surface of the second beam receiving beam 14. Therefore, the third roll segment 20 can be easily moved in the pass line direction of the slab 4.

In CASE2 (11), the fixing member 35 for temporary fixing is released, the fourth roll segment 21 is placed on the upper part of the third roll segment 20, and the third roll segment 20 and the fourth roll segment 20 and The roll segment 21 is fixed.
In CASE2 (12), the spacer 29 is inserted into the gap 28 formed in the second divided surface 26.

In addition, in the procedure (CASE1, CASE2) of the series of carrying-in methods described above, it is necessary to temporarily lift the fourth roll segment 21 or the second roll segment 19 which is online (on the pass line).
Therefore, in Examples 1 and 2 described above, the fact that the slab passage area (pass line) is hollow during non-casting, and that the wire can hang through the hollow, The wire is hung from the overhead crane 34 to lift the fourth roll segment 21 or the second roll segment 19 (CASE1(3), (4) in FIG. 4, CASE2(3), (4) in FIG. 5, (See (7) etc.).

Further, as shown in CASE 1 (5) to (7) of FIG. 4, it is preferable that the second roll segment 19 is temporarily suspended from the third roll segment 20 via the fixing member 35 or the like. Alternatively, the second roll segment 19 may be suspended from the first beam member 10 or the like, or may be kept suspended by the overhead crane 34.
Similarly, as for the fourth roll segment 21, as shown in CASE 2 (8) to (10) of FIG. 5, the fourth roll segment 21 is temporarily removed from the second beam member 11 via the fixing member 35 and the like. It is preferably suspended. Alternatively, the fourth roll segment 21 may be temporarily suspended from another roll segment located above, or the state of being suspended by the overhead crane 34 may be maintained.

That is, it is preferable to temporarily suspend the second roll segment 19 and the fourth roll segment 21 by using some means.
The transport vehicle 31 on the floor F side is a means for moving the second roll segment 19 online, but if it is slidable in the front-rear direction like the first roll segment 18, it can be moved to the floor F. It is possible to eliminate the side carriage 31. Further, the transport carriage 32 on the side of the first beam member 10 is a means for moving the fourth roll segment 21 and the second roll segment 19 online, but the same bulge as the third roll segment 20. If the parts 24 are provided on the second roll segment 19 and the fourth roll segment 21, respectively, the carriage 32 can be dispensed with.

As described above, according to the present invention, in the roll stand 16 that is provided in each of the plurality of strands arranged in the vertical continuous casting facility 1, and is configured by stacking the plurality of roll segments 18 to 21 in the vertical direction, The contact surface of each roll segment 18 to 21 (the gap 28 between the second roll segment 19 and the third roll segment 20 is a contact surface for convenience), that is, the divided surface of each roll segment 18 to 21, By setting the beam receiving beams 13 and 14 provided in the left-right direction at positions that can be avoided, the beam receiving beams 13 and 14 can be set when performing maintenance such as periodic inspection and replacement of the roll stand 16. It is possible to carry in from outside and to carry out from online without interfering with. Further, the rolls 6 can be freely arranged without being restricted by the roll arrangement as long as the divided surfaces of the roll segments 18 to 21 are kept at the above-mentioned positions.

It should be understood that the embodiments disclosed this time are exemplifications in all points and not restrictive. In particular, in the embodiments disclosed this time, matters not explicitly disclosed, for example, operating conditions and operating conditions, various parameters, dimensions, weights, and volumes of components deviate from the scope normally practiced by those skilled in the art. However, a value that can be easily assumed by a person having ordinary skill in the art is adopted.

Further, in the present embodiment, the roll stand 16 in which the cast strip withdrawing stand and the light reduction stand are combined has been described as an example, but these stands are the case of a free roller for preventing cast strip bulging. However, similarly, the present invention can be applied.

1 Continuous casting equipment 2 Tundish 3 Mold 4 Molten steel 5 Cast slab 6 Roll 7 Ladle 8 Immersion nozzle 9 Beam member 10 First beam member (placement surface)
11 Second beam member (mounting surface)
12 Beam receiving beam (front side)
13 1st beam receiving beam 14 2nd beam receiving beam 15 Beam receiving beam 16 Roll stand 17 Roll segment 18 1st roll segment 19 2nd roll segment 20 3rd roll segment 21 4th roll segment 22 Pinch roll 23 Support roll 24 Overhang 25 First split surface 26 Second split surface 27 Third split surface 28 Space (gap)
29 Spacer 30 Fastener 31 Transport cart (floor side)
32 Transport trolley (first beam member side)
33 rail 34 overhead crane 35 fixing member 36 space (gap)
F Floor surface (placement surface)

Claims (3)

A roll stand provided on a continuous casting facility arranged on the floor surface and having a plurality of vertically extending strands arranged in the horizontal direction,
Each of the strands has a roll stand including one or more roll segments each having a pair of rolls, and a roll stand having a plurality of layers stacked in the vertical direction,
At least one of the roll segments extends in the front-rear direction and is provided in a pair on the left and right, and a first beam member arranged above the floor surface or a second beam member arranged above the first beam member. Supported by the
The first beam member is supported by a first beam receiving beam provided so as to cross the front side of the supporting roll segment in the left-right direction,
The second beam member is supported by a second beam receiving beam provided so as to cross the front side of the supporting roll segment in the left-right direction,
The height dimension of the roll segment existing between the first beam receiving beam and the floor surface is smaller than between the lower surface of the first beam receiving beam and the floor surface,
The height dimension of the roll segment existing between the second beam receiving beam and the first beam receiving beam is the same as the lower surface of the second beam receiving beam and the upper surface of the first beam receiving beam. A roll stand equipped in a continuous casting facility that is smaller than the space between . The roll stand provided in the continuous casting facility according to claim 1, wherein the roll segment is a light reduction stand. The spacer is inserted in the dividing surface of the roll segment supported below the roll segment and the roll segment supported by the beam member. Roll stand equipped in the continuous casting equipment of.