JP2011079042A - Cast slab guiding apparatus in continuous casting equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cast slab guiding apparatus in continuous casting equipment in which, even without unitizing roll stands per form in accordance with use, even in the case a cast slab is drawn out with high power to a downstream direction by a driving roll, the prevention in the falling of the plurality of roll stands composed by a pair of free rolls can be attained. <P>SOLUTION: The arc part roll stands 3 as a plurality of roll stands for cast slab guiding are connected each other in the flowing direction of a cast slab by a fastening instrument 12, further, pinch roll stands 2 on the upstream side as roll stands for cast slab drawing force application in the plurality of the arc part roll stands 3 and the arc part roll stands 3 respectively adjacent to the intermediate pinch roll stands are connected to the pinch roll stands 2 on the upstream side and the intermediate pinch roll stands respectively by a fastening instrument 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a slab guide device in a continuous casting facility.

  As a slab guide device in a continuous casting facility, from the upstream side toward the downstream side, an upper pinch roll stand unit, an arc portion roll stand unit, a straightening reaction force receiving roll stand, an intermediate pinch roll stand unit, a straightening roll stand unit, a horizontal roll The thing arrange | positioned in order of the stand unit and the lower pinch roll stand unit is known (for example, refer patent document 1).

  In addition, as a light reduction technology for a slab guide device in a continuous casting facility, it has a lower frame in which a lower roll group is disposed and an upper frame in which an upper roll group is disposed. A pair of front and rear columns (four columns) are continuously connected to the upper side, and these columns are inserted into the four corners of the upper frame, and the upper frame is appropriately inclined to roll the lower roll and the upper roll. What sets a gap | interval in the taper shape along the flow direction of a slab is known (for example, refer patent document 2).

  Further, in a slab guide device in a continuous casting facility that guides a slab drawn from a mold through a roll having a plurality of pairs of rolls, each pair of rolls is supported by a bearing box via a bearing, A plurality of reference side bearing boxes are detachably provided on a common frame via fasteners, while a bearing box of the other roll is used as an anti-reference side bearing box. A configuration is also known in which the box is detachably connected to the box via a fastener, and the adjacent anti-reference side bearing boxes are connected by a connecting fastener (bolt / nut) (for example, Patent Document 3). See).

  Further, it is a slab guide device of a continuous casting facility that guides a slab drawn from a mold through a roll stand having a plurality of pairs of rolls, and each pair of rolls is supported on a bearing box via a bearing. The bearing box of one roll is detachably provided as a reference side bearing box on the common frame of the continuous casting facility, and the bearing box of the other roll is detachably connected to the reference side bearing box as an anti-reference side bearing box. In the cast slab guide device, a plurality of adjacent anti-reference side bearing boxes can be attached and detached through a rigid member having a bending rigidity in the slab guide direction while connecting the plurality of anti-reference side bearing boxes to each other. There is also known a structure formed by bonding (see, for example, Patent Document 4).

Japanese Examined Patent Publication No. 62-32019 JP 2000-312956 A JP 2006-35236 A JP 2008-221323 A

  However, the slab guide device in the continuous casting facility disclosed in Patent Document 1 has the following problems.

  In this slab guide device, various types of units are used depending on the application, but since the roll is always in contact with the high-temperature slab, the wear of the roll progresses and the diameter is reduced with operation. As a result, the roll alignment becomes irregular, and once a breakout occurs, the roll stand is damaged in a way that cannot be used continuously and is forced to be replaced. At this time, if it is a unit, replacement of the roll stand becomes complicated.

  Moreover, the following problems exist in the light rolling technology of the slab guide device in the continuous casting facility disclosed in Patent Document 2.

  In the case of a slab having a large cross section even under light reduction, the required reduction force on the slab exceeds 100 tons per pair of rolls. In such a case, the column stretch and the upper frame deformation (bending deformation) become very large. However, because of the structure, it is difficult to further increase the rigidity of the roll stand, and it is difficult to accurately determine the net slab reduction force during casting due to the effects of elongation and deformation. In addition, since the four columns are erected at the four corners of the lower frame, it is vulnerable to horizontal external force (particularly the upper roll).

  Further, the slab guide device in the continuous casting facility disclosed in Patent Document 3 has the following problems.

  In the slab guide device that guides the slab through the rolls, when an abnormality such as a foreign object biting into the slab occurs when the slab is pulled out with a pinch roll in the downstream direction, a very large force acts in the downstream direction. To do. However, in the case of equipment that performs light reduction, the rolling resistance by a large number of reduction roll stands acts, so that the required pulling force of the pinch roll becomes very large, and the connection between four adjacent anti-reference side bearing boxes is continued. Only the structure connected with the fasteners (bolts and nuts) limits the effect of preventing the roll stand that guides the slab from falling.

  Further, the slab guide device in the continuous casting facility disclosed in Patent Document 4 has the following problems.

  In the slab guide device that guides the slab through the rolls, when an abnormality such as a foreign object biting into the slab occurs when the slab is pulled out with a pinch roll in the downstream direction, a very large force acts in the downstream direction. To do. However, in the case of equipment that performs light reduction, rolling resistance by a large number of reduction roll stands acts, so that the required pulling force of the pinch roll becomes very large, and the four adjacent anti-reference side bearing boxes are connected to each other. At the same time, only the configuration in which the slab is detachably joined via the rigid member having the bending rigidity with respect to the slab guide direction has a limit on the fall prevention effect of the roll stand that guides the slab.

  The object of the present invention is that the roll stand is constituted by a pair of free rolls even when the slab is pulled out with a large force in the downstream direction by a drive roll without unitizing each roll according to the application. An object of the present invention is to provide a slab guide device for a continuous casting facility capable of preventing a plurality of roll stands from falling.

In order to achieve this object, the invention according to claim 1 of the present invention provides:
A slab pulling force imparting roll stand (hereinafter referred to as a “slab squeezing pulling force imparting roll stand”) and a pair of free rolls provided with a drive roll that imparts a pulling force for pulling a slab of a continuous casting facility. A plurality of slab guide roll stands (hereinafter referred to as "slab guide roll stands") on the side from which the slab is pulled out by the slab pulling force.
A slab guide device for continuous casting equipment having a structure in which a lower side of the plurality of slab guide roll stands is constrained to a fixed side of the continuous casting equipment,
At least a part of the plurality of slab guide roll stands is connected to each other in the flow direction of the slab by a fastening means, and the slab pulling force imparting roll stand among the plurality of slab guide roll stands is provided. The slab guide roll stands adjacent to each other are connected to the upstream side and / or the downstream side of the slab drawing force applying roll stand by fastening means, and the plurality of connected slab guide roll stands are connected to the casting slab. A slab guide device for continuous casting equipment, wherein the slab guide device is connected to one of the roll stands for providing a single drawing force via a fastening means.

The invention according to claim 2 is the invention according to claim 1,
The slab pulling force applying roll stand is a plurality of pinch roll stands provided with a pair of rolls, and the lower side of the plurality of pinch roll stands is constrained to the fixed side of the continuous casting equipment, The pinch roll stands are connected to each other by fastening means in the flow direction of the slab.

The invention according to claim 3 is the invention according to claim 1 or 2,
The fastening means includes a turnbuckle and rotating portions provided at both ends of the turnbuckle, or a fastening member extending in a direction perpendicular to the flow direction of the slab and the fastening member. One of a pair of extending portions extending from both end surfaces orthogonal to the flow direction of the slab and rotating portions provided at both ends of each extending portion, To do.

The invention according to claim 4 is the invention according to any one of claims 1 to 3,
The fastening means is
When the trajectory of the slab has a curvature, in order to fasten, it is composed of bolts, nuts and angle absorbing parts,
If the trajectory of the slab is approximately horizontal, it is composed of bolts, nuts and plain washers, or is composed of bolts, nuts and angle absorbing parts, or a plate, for fastening. It is comprised from a volt | bolt, or is comprised from a volt | bolt in order to contact | abut, It is at least any one of being comprised from at least 1 wedge, It is characterized by the above-mentioned.

The invention according to claim 5 is the invention according to claim 4,
The angle absorbing part is any one of a rotating part, a spherical washer and a spherical bush.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the installation position of the fastening means is above the contact point between the lower roll and the slab. Features.

As described above, according to the slab guide device for continuous casting equipment according to the present invention,
At least a part between the plurality of slab guide roll stands is connected to each other in the flow direction of the slab by fastening means, and adjacent to the slab drawing force applying roll stand in the plurality of slab guide roll stands. The slab guide roll stand to be connected is connected to the upstream side and / or the downstream side of the slab drawing force applying roll stand by fastening means, and the plurality of connected slab guide roll stands are connected to the slab drawing roll. Since it is configured to be connected to one of the force-applying roll stands via a fastening means, the slab is large in the downstream direction with a driving roll without the roll stand being unitized for each mode according to the application. Even when pulled out by force, it is possible to prevent a plurality of roll stands constituted by a pair of free rolls from falling.

It is a schematic whole front view of one embodiment of a slab guide device for continuous casting equipment according to the present invention. It is the A section enlarged view of FIG. It is the B section enlarged view of FIG. It is the C section enlarged view of FIG. It is the D section enlarged view of FIG. It is the E section enlarged view of FIG. It is a schematic plan view for demonstrating the outline of another fastening means between the circular arc part roll stands of the embodiment. It is a schematic plan view for demonstrating the outline of another fastening means between the circular arc part roll stands of the embodiment. It is a schematic front view for demonstrating the outline of another fastening means between the reduction roll stand of the embodiment, and the downstream pinch roll stand (F section of FIG. 1). It is a schematic front view for demonstrating the outline of another fastening means of the G section (fastening means between the pinch roll stands of a downstream side) of FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

(Embodiment 1)
1 is a schematic overall front view of an embodiment of a slab guide device for continuous casting equipment according to the present invention, FIG. 2 is an enlarged view of part A in FIG. 1, FIG. 3 is an enlarged view of part B in FIG. 3 is an enlarged view of a portion C in FIG. 3, FIG. 5 is an enlarged view of a portion D in FIG. 3, and FIG. 6 is an enlarged view of an portion E in FIG.

  1 to 6, 1 is a slab guide passage, and 2 is a slab pulling force applying roll stand (hereinafter referred to as “slab slab” provided with a driving roll for applying a pulling force for pulling out a slab of a continuous casting facility. An upstream pinch roll stand as a pulling force imparting roll stand), 2a is an upper roll on the opposite side of the upstream pinch roll stand 2, and 2b is a lower roll on the reference side of the upstream pinch roll stand 2. Rolls, 2c are fasteners for fixing the upstream pinch roll stand 2 to a support base installed in the staircase section, 3 is provided with a pair of free rolls, and a plurality of slabs are pulled out by the slab pulling force. A slab guide roll stand (hereinafter referred to as a slab guide roll stand) 3a is the upper roll on the opposite side of the arc part roll stand 3, 3b is the arc part roll The lower roll 3 on the reference side of the steel stand 3, 3c is a fastener for fixing the arc-shaped roll stand 3 to the common frame, 4 is an intermediate pinch roll stand as a roll stand for applying the slab pulling force, and 4a is an intermediate 4b is a lower roll on the reference side of the intermediate pinch roll stand 4 and 4c is a fastening for fixing the intermediate pinch roll stand 4 to a support base installed on the floor. 5 is a rolling / correcting roll stand as a roll stand for guiding the cast slab, 5a is an upper roll on the non-reference side of the rolling / correcting roll stand 5, 5b is a lower roll on the reference side of the rolling / correcting roll stand 5, 5c is a fastener for fixing the reduction / correction roll stand 5 to a support stand installed on the floor, 6 is a reduction roll stand as a roll stand for guiding the slab, Is a pinch roll stand on the downstream side as a roll stand for providing the slab pulling force, and 10 is a pinch roll stand 2 on the upstream side when the trajectory of the cast piece has a curvature. Fastening means for fastening or connecting the reduction / correction roll stands 5 between the reduction / correction roll stands 5 adjacent to the intermediate pinch roll stand 4 in the flow direction of the slab. 10a is a bolt, 10b is a spherical washer as an angle absorbing portion, 10c is a nut, 11 is a slab flow between the upstream pinch roll stand 2 and the arc portion roll stand 3 adjacent to the upstream pinch roll stand 2. Fastening means for fastening in the direction, 12 is fastening means for fastening the arcuate roll stands 3 together in the flow direction of the slab and connecting them , 12b is a turnbuckle, 12a is a pivoting portion that is structured to be pivotable by pin coupling provided at both left and right ends of the turnbuckle 12b, and 13 is adjacent to the intermediate pinch roll stand 4 and the intermediate pinch roll stand 4. Fastening means for fastening between the arcuate roll stands 3 in the flow direction of the slab, 13b is a turnbuckle, 13a is a turning portion having a structure that can be turned by pin coupling provided at the right end of the turnbuckle 13b, Reference numeral 13c denotes a rotating portion which is provided at the left end of the turnbuckle 13b and can be rotated by a pin connection. Reference numeral 15 denotes a reduction / correction roll stand 5 when the slab flow path is substantially horizontal, a reduction / correction roll. Between the reduction roll stand 6 adjacent to the stand 5 and the reduction / correction roll stand 5, between the reduction roll stands 6, between the reduction roll stand 6 and the reduction roll Fastening means for fastening or connecting the pinch roll stands 7 on the downstream side adjacent to the roll stand 6 in the flow direction of the slab between the pinch roll stands 7 on the downstream side, 15a is a bolt, 15b is A plain washer 15c is a nut.

  In the slab guide device according to the present embodiment, the slab flow path has a curved portion with a curvature from directly under the casting, and the slab flow path has a substantially horizontal horizontal part along the slab guide passage 1. One piece has two upstream pinch roll stands 2, eight arc roll stands 3, two intermediate pinch roll stands 4, four reduction / correction roll stands 5, five reduction roll stands 6, three downstream It moves from the upstream side to the downstream side in the order of the pinch roll stand 7. In addition, the drive rolls in the above-described slab pulling force imparting roll stands 2, 4, 7 may be “drive rolls for both the reference side roll (lower roll) and the anti-reference side roll (upper roll)” In some cases, the "reference side roll is a drive roll and the non-reference side roll is a free roll" or the "reference side roll is a free roll and the anti-reference side roll is a drive roll".

  Further, as the fastening means 10, as shown in FIGS. 2, 3 and 5, in order to fasten each roll stand installed above the contact point between the lower rolls 2b, 4b, 5b and the slab, A bolt 10a, a spherical washer 10b, and a nut 10c are used.

  As shown in FIGS. 2, 3 and 4, the fastening means 12 is installed above the contact point between the lower roll 3 b and the cast piece, and adjusts the distance between the adjacent arc portion roll stands 3. The turnbuckle 12b that can be fastened while rotating, and a rotating portion 12a that allows the arcuate roll stand 3 and the turnbuckle 12b to rotate freely are used.

  Further, as shown in FIGS. 3 and 4, the fastening means 13 is installed above the contact point between the lower rolls 3 b and 4 b and the cast piece, and the adjacent arc portion roll stand 3 and the intermediate pinch roll stand 4. A turnbuckle 13b that can be fastened while adjusting the distance between the turntable 13b, a turnable portion 13a that can turn between the arcuate roll stand 3 and the turnbuckle 13b, and an intermediate pinch roll stand 4 and the turnbuckle 13b. The rotating part 13c which makes it rotatable is used. The fastening means 11 has a structure in which the fastening means 13 is reversed right and left. Further, as shown in FIGS. 3 and 4, pin coupling is used as a rotating portion 12 a that is rotatable to fasten between the arcuate roll stands 3. Therefore, even if the heights of adjacent pin couplings change, there is no problem because the coupling part rotates. In the present embodiment, the pitch between the arcuate roll stands 3 is the same distance (1260 mm). However, even when the pitch is different, the pinned portion does not cause the joint portion to bend.

  The two upstream pinch roll stands 2 are fastened by the fastening means 10 described above. The upstream pinch roll stand 2, the eight arcuate roll stand 3 and the intermediate pinch roll stand 4 are all fastened and connected by the fastening means 11, 12, 13 described above. Further, the two intermediate pinch roll stands 4 are also fastened by the fastening means 10 described above. Also, as shown in FIG. 3, the intermediate pinch roll stand 4 and the reduction / correction roll stand 5 have a short distance between adjacent stands, so that the nut 10c is in contact with each stand via the spherical washer 10b. . Thereby, it has a function equivalent to the pin coupling as rotation part 12a, 13a, c shown in FIG. In the straightening zone such as the reduction / straightening roll stand 5, the reference arc radius differs depending on the location, so that the angular relationship between adjacent stands differs depending on the location. Even in a place where the angular relationship between the adjacent stands is different, different angles can be accommodated by using the spherical washer 10b. Thereby, a stand structure can be unified.

  In the present invention, since the structure as described above is adopted, even if a pulling force of the slab is generated in the downstream direction from the upstream pinch roll stand 2 or the intermediate pinch roll stand 4, this pulling force is reduced. By using the internal force of the fastening means, the overturning moment acting on the eight arcuate roll stands 3 can be reduced or eliminated, and the arcuate roll stand 3 can be prevented from overturning.

  Further, as shown in FIG. 3, since the arc portion roll stand 3 is vertically long, the distance between the fasteners 3c (for example, bolts) for fixing the arc portion roll stand 3 to the common frame is also short. There is also a risk that the bolt will break when the overturning moment acts, but naturally this risk can also be avoided.

  Further, when foreign matter is caught in the roll by breakout or the like, the maximum pulling force (for example, see arrow A in FIG. 3) of the upstream pinch roll stand 2 or the intermediate pinch roll stand 4 is It acts on all of the side pinch roll stand 2 and the intermediate pinch roll stand 4, and a very large overturning moment resulting from this is applied. However, this risk can be avoided by adopting the structure as described above. Further, since the intermediate pinch roll stand 4 is also vertically long like the arc portion roll stand 3, the distance a between the fasteners 4c (for example, bolts) for fixing to the common frame is short, and the above-described overturning moment acts. There is also a risk that the bolt will break, but naturally this risk can also be avoided.

  In addition, the rolling resistance acts on the four reduction / correction roll stands 5 and the five reduction roll stands 6, so that a large overturning moment acts toward the downstream side. On the other hand, a large overturning moment acts on the two intermediate pinch roll stands 4 and the three downstream pinch roll stands 7 as a reaction force toward the upstream side. However, in this invention as well, this risk can be avoided because the fastening means 10 and 15 are fastened and connected as described above. In this case, the pulling force of the two intermediate pinch roll stands 4 and the three downstream pinch roll stands 7 is not an external force. Further, the most downstream side of the reduction roll stand 6 and the most upstream side of the pinch roll stand 7 are also fastened by fastening means 15 as shown in FIG. For this reason, since the pulling force of the pinch roll stand 7 becomes the internal force (compression force) of the fastening means 15, no overturning moment is generated in the reduction roll stand 6 and the pinch roll stand 7. When the slab is fed back as a breakout treatment, the internal force (tensile force) of the fastening means 15 is obtained. Even in this case, no overturning moment is generated in the reduction roll stand 6 and the pinch roll stand 7.

  In the present embodiment, the case where the fastening means 15 is fastened at the time of fastening the portion shown in the F part of FIG. 1 has been described, but the present invention is not necessarily limited thereto. As described above, the tipping moment acting on the five rolling roll stands 6 and the tipping moment acting on the three downstream pinch roll stands 7 are directions facing each other. It is also possible to adopt a configuration in which a pair of wedges 40 are brought into contact with each other. A pair of wedges 40 is not necessarily provided between the rolling roll stands 6, and at least one wedge 40 may be provided on either side between the rolling roll stands 6. Further, as shown in FIG. 10, instead of the abutting bolt 30 as the fastening means described in the G part of FIG. 9, a fastening means 50 constituted by a friction joining plate 50a and a bolt 50b may be used. Of course it does not matter.

  Further, in the present embodiment, for example, as shown in FIG. 4, the fastening means 12 constituted by the turnbuckle 12b and the rotating portion 12a has been described in order to fasten and connect the arcuate roll stands 3 and the like. However, it is not necessarily limited to this. For example, as shown in FIG. 7, a plate 20b extending in a direction perpendicular to the flow direction of the slab, and a pair of extending portions extending from both end surfaces of the plate 20b perpendicular to the flow direction of the slab It is also possible to use the fastening means 20 composed of the rotating portions 20a provided at both ends of each extending portion. Further, as shown in FIG. 8, a connecting member 25b made of two steel rectangular bodies or tubular bodies extending in the flow direction of the slab and a flow direction for connecting the two connecting members 25b The fastening means 25 is composed of two connecting members 25c provided in a direction orthogonal to each other and rotating portions 25a provided in pairs on both end surfaces in the flow direction of the two connecting members 25b. It is also possible. Thereby, since the rigidity of fastening means 20 and 25 itself increases, the rigidity of the slab width direction of a slab guide apparatus can be improved.

  In the present embodiment, the example in which the spherical washer 10b is used as the angle absorbing portion of the fastening means 10 has been described. However, the present invention is not necessarily limited thereto. For example, a spherical bush can be used instead of the spherical washer.

  In the present embodiment, the arc shape roll stand group, the pinch roll stand group, the reduction / correction roll stand group, and the reduction roll stand group are unified into a stand type. As a result, the number of stand units for the “spare machine” can be significantly reduced. In an extreme case, one pair of roll stands may be held as a “spare machine” for each group. As described above, by adopting the present invention, the roll stand constituted by a pair of upper and lower rolls is not required to be unitized for each style depending on the application, and thus damage that cannot be continuously used is given to the roll stand. Even when it is forced to replace, the roll stand can be easily replaced.

  Moreover, it is more preferable that the installation position of the fastening means is at the upper position of each stand as in this embodiment. If the installation position of the fastening means is at least above the position of the contact point between the lower roll and the slab, for example, even if a foreign object bites between the lower roll and the slab, the overturning moment that acts on each stand There will be no.

  Moreover, although this embodiment demonstrated the example in which each fastening means was installed in the upper part of each stand, it is not necessarily limited to this. It is sufficient that at least the installation position of each fastening means is above the contact point between the lower roll and the slab.

Further, in the present embodiment, as shown in FIG. 1, an example in which an upstream pinch roll stand 2, an intermediate pinch roll stand 4 and a downstream pinch roll stand 7 are provided has been described. It is not limited. For example, there is a continuous casting facility that does not have a pinch roll stand in between, and a continuous casting facility that does not have a reduction roll stand. In addition, there is a continuous casting facility in which not only a pair of upper and lower rolls but also a pair of upper and lower roll stands and a roll stand having only a lower roll are mixed. Furthermore, there is a continuous casting facility that does not have an arc portion roll stand or a horizontal portion roll stand.
Moreover, as shown in FIG. 1, all the slab guide roll stands (arc portion roll stand 3, reduction / correction roll stand 5, reduction roll stand 6) and all slab drawing force application roll stands (upstream side) When the pinch roll stand 2, the intermediate pinch roll stand 4, and the downstream pinch roll stand 7) are connected to each other, this configuration is more preferable because the pulling force does not become an external force (is an internal force). On the other hand, when the fastening means has a non-water-cooled structure, if a plurality of fastening means are connected in the slab flow direction, the cumulative expansion and contraction in the slab flow direction due to temperature change increases. , And provide a place where the fastening means for connecting the slab guide roll stands is not provided (for example, the fastening means is not provided between the fourth and fifth positions counted from the upstream side of the arcuate roll stand 3). It doesn't matter. In this case, each group of slab guide roll stands connected to each other may be connected to any one of the pinch roll stands 2, 4, 7 by fastening means.
Usually, the slab pulling force imparting roll stand has a structure that is stronger against the overturning moment than the slab guide roll stand, and has the above-described structure (for example, 4 counted from the upstream side of the arc part roll stand 3). There is no practical problem even though no fastening means is provided between the second and fifth. At least all the slab pulling forces cannot be set as internal forces, but the total pulling force of a plurality of pinch roll stands can be avoided (distributed) from concentrating on a specific slab guiding roll stand.
About the above-mentioned effect, for example, the example which the slab bites into the 4th counting from the upstream of the above-mentioned arc part roll stand 3 is explained a little in detail. When there is no fastening means between the eight arcuate roll stands 3, the sum of the pulling forces of the pinch roll stands 2, 4, and 7 naturally acts on the fourth arcuate roll stand 3 as a tipping moment. However, the fastening means is not provided between the fourth structure and the fifth position counted from the upstream side of the arc-shaped roll stand 3 (for example, each group of slab guide roll stands connected to each other is at least In the case of the structure in which the pinch roll stands 2 and 7 are connected to each other by fastening means), the pulling force of the pinch roll stand 2 becomes an internal force. Does not work. In this case, only the sum of the pulling forces of the pinch roll stand 4 and the pinch roll stand 7 acts as a tipping moment on the fourth arcuate roll stand 3, but since the above structure is employed, at least The roll stand can be prevented from falling over, which is the object of the present invention.
Further, in the case shown in FIG. 1, the configuration shown in FIG. 1 (all castings) is also provided when the fastening means is not first deployed from the most downstream side of the upstream pinch roll stand 2 and the upstream side of the arcuate roll stand 3. Compared to the case where the single guide roll stand and all slab pulling force imparting roll stands are connected to each other by fastening means), the effect of preventing overturning is reduced, but the eight arcuate roll stands connected to each other. Since the group 3 is connected to the pinch roll stand 4 by fastening means, at least the roll stand can be prevented from falling over, which is the object of the present invention.
Further, in the case shown in FIG. 1, the configuration shown in FIG. 1 (all slab guide roll stands and Although the fall prevention effect is lower than in the case of all slab pulling force application roll stands connected to each other by fastening means), the group of five connected roll-down roll stands 6 is a pinch roll stand. 7 is connected to the intermediate pinch roll stand 4 by the fastening means, and the group of four connected reduction / correction roll stands 5 is connected to the intermediate pinch roll stand 4 by the fastening means. Prevention is achievable.

  Further, in the present embodiment, a plurality of pinch roll stands configured as “one pair rolls” are connected by fastening means, but the pinch roll stands are defined as “multiple pair roll integrated stands” and adjacent “one pair rolls”. A method of connecting the “roll stand” with fastening means is also conceivable. Furthermore, it is also conceivable that not all roll stands are configured as “one pair rolls”, but some of the stands are configured as “multiple pair rolls”.

1: slab guide passage 2: upstream pinch roll stand 2a, 3a, 4a, 5a: upper roll 2b, 3b, 4b, 5b: lower roll 2c: fastener 3: arc portion roll stand 4: intermediate pinch roll Stand 5: Rolling / rectifying roll stand 6: Rolling roll stand 7: Downstream pinch roll stand 10, 15, 50: Fastening means 10a, 15a, 30, 50b: Bolt 10b: Spherical washer 10c, 15c: Nut 11, 12 13, 20, 25: Fastening means 12a, 13a, 13c, 20a, 25a: Rotating part 12b, 13b: Turnbuckle 15b: Plain washer 20b, 50a: Plate 25b, 25c: Connecting member 40: Wedge

Claims (6)

A slab pulling force imparting roll stand (hereinafter referred to as a “slab squeezing pulling force imparting roll stand”) and a pair of free rolls provided with a drive roll that imparts a pulling force for pulling a slab of a continuous casting facility. A plurality of slab guide roll stands (hereinafter referred to as "slab guide roll stands") on the side from which the slab is pulled out by the slab pulling force.
A slab guide device for continuous casting equipment having a structure in which a lower side of the plurality of slab guide roll stands is constrained to a fixed side of the continuous casting equipment,
At least a part of the plurality of slab guide roll stands is connected to each other in the flow direction of the slab by a fastening means, and the slab pulling force imparting roll stand among the plurality of slab guide roll stands is provided. The slab guide roll stands adjacent to each other are connected to the upstream side and / or the downstream side of the slab drawing force applying roll stand by fastening means, and the plurality of connected slab guide roll stands are connected to the casting slab. A slab guide device for continuous casting equipment, wherein the slab guide apparatus is connected to one of the roll stands for applying a single drawing force via a fastening means.   The slab pulling force applying roll stand is a plurality of pinch roll stands provided with a pair of rolls, and the lower side of the plurality of pinch roll stands is constrained to the fixed side of the continuous casting equipment, The slab guide device for continuous casting equipment according to claim 1, wherein the pinch roll stands are connected to each other in the flow direction of the slab by fastening means.   The fastening means includes a turnbuckle and rotating portions provided at both ends of the turnbuckle, or a fastening member extending in a direction perpendicular to the flow direction of the slab and the fastening member. One of a pair of extending portions extending from both end surfaces orthogonal to the flow direction of the slab and rotating portions provided at both ends of each extending portion, The slab guide device for continuous casting equipment according to claim 1 or 2. The fastening means is
When the trajectory of the slab has a curvature, in order to fasten, it is composed of bolts, nuts and angle absorbing parts,
If the trajectory of the slab is approximately horizontal,
To be fastened, composed of bolts, nuts and flat washers, or composed of bolts, nuts and angle absorbing parts, or composed of plates and bolts, or to contact And at least one of a bolt and at least one wedge. 5. The method according to claim 1, wherein the bolt is a bolt or at least one wedge. A slab guide device for the continuous casting equipment described.   The slab guide device for continuous casting equipment according to claim 4, wherein the angle absorbing portion is any one of a rotating portion, a spherical washer and a spherical bush.   The slab guide device for continuous casting equipment according to any one of claims 1 to 5, wherein the installation position of the fastening means is above a contact point between the lower roll and the slab.

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