JP2008221323A - Slab guide device for continuous casting equipment - Google Patents

Abstract

In a slab guide device without a tie rod, it is possible to prevent a bearing box from falling over by a relatively simple structure when an abnormal load occurs, and to cope with a change in roll diameter due to refurbishment, as well as assembly / disassembly workability. A slab guide device for continuous casting equipment is also provided.
A slab guide device for continuous casting equipment that guides a slab through a roll stand having a plurality of pairs of rolls, each pair of rolls being mounted on bearing boxes 4 and 5 via bearings. The bearing box 4 of one roll 2 is detachably provided on the common frame 1 of the continuous casting equipment as a reference side bearing box, and the bearing box 5 of the other roll is used as an anti-reference side bearing box. In the slab guide device detachably connected to 4, the adjacent anti-reference side bearing boxes 5 connect the anti-reference side bearing boxes 5 to each other and have bending rigidity in the slab guide direction. It is detachably joined via a rigid member 31.
[Selection] Figure 1

Description

  The present invention relates to a slab guide device in a continuous casting facility, and further relates to an improvement in roll stand rigidity against a large pulling force when a slab guide device having no tie rod is abnormal.

  The continuous casting facility has a basic structure shown in FIG. 9, for example. That is, first, the molten steel 41 is injected from the tundish 42 through the immersion nozzle 43 into the mold 44 having an internal cooling structure and provided with vibration by the vibration device. Next, the molten steel 41 is cooled by the mold 44 and solidified. As a result, the obtained slab 45 is provided with a plurality of guide slab guides provided with a plurality of guide rolls (hereinafter also simply referred to as rolls) 46 that are continuously arranged in a curved shape and a horizontal shape from directly below the mold 44. A structure for supporting and carrying out by the device 47 is provided. In addition, 48 is a ladle, 49 is a slab drawing apparatus, 50 is a slab cutting apparatus.

  And as said slab guide apparatus, the thing of the structure as shown by the 4th-6th figure of the patent 2908462 (patent document 1) is generally used, for example. FIG. 10 is an explanatory diagram of a slab guide device shown by citing FIGS. 4 and 6 of Patent Document 1. FIG. Based on FIG. 10, the structure of the slab guide device according to the prior art 1 will be described below.

  A plurality of guide rolls 53 are attached to each of the upper frame 51 and the lower frame 52 via a bearing box 54 at a predetermined interval, and the upper frame 51 and the lower frame 52 are opposed to each other on the guide roll side surface. 51 is connected to the lower frame 52 via four tie rods 55. Further, the lower frame 52 is fixed to a reference frame (not shown) of the continuous casting facility and is installed in the continuous casting facility.

  In the slab guide device having the above-described configuration, the frame is provided with an internal water cooling structure and the bearing box is provided with a heat insulating plate in order to protect the machine from the radiant heat of the slab. In some cases, the frame is not cooled with water and a heat insulating cover is installed, or the outer periphery of the bearing box is made into a water cooling structure. In addition, a shim is provided between the lower frame seat surface on which the bearing housing is installed and the bearing housing, and the reference side roll alignment is adjusted by adjusting the thickness of the shim, and further, the upper frame seat surface on which the bearing housing is installed. A shim is provided between the bearing box and the roll gap by adjusting the thickness of the shim.

  By the way, in the above-described slab guide apparatus incorporated in a continuous casting facility, the guide roll being cast receives a load (molten steel static pressure / correction reaction force) from the slab, but the initially set roll gap ( In order to obtain good slab quality, it is important to accurately maintain the distance between the paired roll surfaces, which corresponds to the slab thickness) during casting.

  However, in the conventional slab guide device described above, it is difficult to ensure sufficient roll stand (upper and lower frames, tie rods, etc.) rigidity, and the roll stand rigidity is small with respect to the load from the slab. Yes. When a load is applied from the slab, a tensile force acts on the tie rod that connects the upper frame and the lower frame and elastically deforms, so that the roll gap is larger than the initially set roll gap. Since the member connecting the upper frame and the lower frame is long, the amount of deformation (elastic deformation) is also large.

  In addition, the load from the slab becomes a load in the direction in which the upper frame material and the lower frame material are bent with the tie rod as a fixed point. Therefore, a bending moment is generated in the frame, and the frame is bent (the frame material is deformed by the bending force). The deflection is very large), and the gap between the rolls becomes wider. If the cross-sectional area of the tie rod member is increased and the cross-sectional moment of the upper frame member and the lower frame member are increased so as to increase the rigidity, the roll stand is increased in size and weight.

  Further, during casting, each of the above members is exposed to the radiant heat or high temperature atmosphere of the slab, and each member constituting the frame is thermally deformed in a complicated manner. Since the member temperature rises, the roll gap widens. The part exposed to radiant heat becomes high temperature, and the part not exposed to radiant heat has a relatively low temperature. For this reason, each member constituting the frame also undergoes bimetallic thermal deformation. For this reason, it becomes different from the initial roll gap during casting.

  When the roll gap becomes large in this way, bulging occurs in the slab, tensile force is generated inside the solidified shell, internal cracks occur, and the internal quality of the slab is impaired. When bulging occurs at the end of solidification of the slab, the concentrated molten steel that exists at the grain boundary of the solid-liquid coexisting phase at the crater end flows, causing central segregation and impairing the internal quality of the slab.

  There is also a cast piece guide device in which an upper frame and a lower frame are formed in an integral structure without using a tie rod. In this slab guide device, when an upper roll is installed, the work is directed upward, and workability is poor and dangerous. When the upper and lower frames are separated, it is possible to incorporate rolls into the upper and lower frames (with the upper and lower frames disassembled), but it is necessary to reverse the upper frame. The work of assembling (merging) the upper frame and the lower frame is required. It is an assembly work for a large structure, and the workability is poor and dangerous.

  By the way, a breakout may occur during casting, or a trouble may occur in which the slab stays in the slab guide device due to an operation stop such as a power failure. In this case, both ends of the slab remaining in the slab guide device are gas-cut, and the slab is held in the slab guide device and taken out to an off-line maintenance facility. In a roll stand in which the upper frame and the lower frame are integrated, it takes a lot of labor to remove the slab that has been caught.

Also, since the rolls wear with casting, regular online alignment adjustment and roll gap adjustment are necessary. The clearance adjustment is performed by inserting and removing a shim provided between the frame seating surface and the bearing housing. However, due to the structure, the close contact property is poor and labor is required.
In addition, if the roll profile and roll pitch are different, the frame shape of the slab guide device will be different, a frame dedicated to the corresponding part will be required, the number of types of frames will increase, and the number of spare machines will also increase.

  Furthermore, troubles may occur in which foreign matter is caught in the slab. Larger gaps than the set roll gap pass between the paired rolls, causing an abnormal load on the rolls, which may cause roll breakage, bearing (bearing) breakage, frame deformation, and other damage. On the other hand, there may be a problem that the slab temperature is abnormally lowered, but an abnormal load is generated because the deformation resistance of the slab increases as the slab temperature decreases.

  Accordingly, a slab guide device according to the related art 2 proposed as a solution to the various problems as described above will be described below with reference to FIGS. 11 is a front view of a slab guide device for a continuous casting facility according to Prior Art 2, and FIG. 12 is a WW cross-sectional view of FIG.

  That is, the slab guide device of the continuous casting equipment according to the prior art 2 is a slab guide of the continuous casting equipment that guides the slab 13 drawn from the mold through the rolls having a plurality of pairs of rolls 2 and 3. In the apparatus, each pair of rolls 2 and 3 is pivotally supported by bearing housings 4 and 5 via bearings 10, and the bearing housing 4 of one roll 2 is used as a reference-side bearing housing and fastened to a common frame 1 of a continuous casting facility. It is detachably provided via the tool 14.

  At the same time, the bearing box 5 of the other roll 3 is used as an anti-reference side bearing box and is detachably connected to the reference side bearing box 4 via a fastener 22. And even if a large force acts in the downstream direction of the slab pass line due to an abnormality such as a foreign matter biting into the slab 13, the adjacent anti-reference side is used for the purpose of preventing the bearing boxes 4 and 5 from falling over. The bearing housings 5 are connected by connecting fasteners (bolts and nuts) 26 (see Patent Document 2).

However, in the slab guide device having such a configuration, the connecting fastener 26 serves as a tension member or a compression member, and a large force acting on a specific roll in the event of an abnormality is applied to a plurality of reference points in the roll segment. The bearing box 5 can be dispersed in the side bearing box 4 and the plurality of anti-reference side bearing boxes 5, but the bearing box 5 is adjusted between the rolls 2 and 3 and changes in the roll diameter (when the rolls 2 and 3 are worn) Since the outer diameter is reduced by cutting and refurbishing), the relative upper surface height between the adjacent bearing housings 5 changes, and there is a problem that bolt joining becomes difficult. found.
Japanese Patent No. 2908462 (FIGS. 4 to 6) JP 2006-35236 A

  The present invention has been made in order to solve the various problems as described in the background art described above, and the object of the present invention is to turn over a bearing box when an abnormal load occurs in a slab guide device without a tie rod. Therefore, it is possible to provide a slab guide device for a continuous casting facility that can prevent the above-described problem with a relatively simple structure, can cope with a change in roll diameter due to refurbishment, and has good assembling / disassembling workability.

  The present invention for achieving the above object comprises a slab guide device having the following configuration. That is, the means adopted by the slab guide device of the continuous casting equipment according to claim 1 of the present invention is the casting of the continuous casting equipment that guides the slab drawn from the mold through the rolls having a plurality of pairs of rolls. The present invention relates to a single guide device.

  And this slab guide device, with each pair of rolls pivotally supported on a bearing box via a bearing, while detachably providing a bearing box of one roll as a reference side bearing box on a common frame of a continuous casting facility, In the slab guide device which is detachably connected to the reference side bearing box using the bearing box of the other roll as the anti-reference side bearing box, a plurality of adjacent anti-reference side bearing boxes are formed of the plurality of anti-reference side bearing boxes. It connects with each other, and is joined so that attachment or detachment is possible via the rigid member provided with the bending rigidity with respect to the slab guidance direction.

  The means adopted by the slab guide device of the continuous casting equipment according to claim 2 of the present invention is the slab guide device of continuous casting equipment according to claim 1, wherein the rigid member has both ends of the other roll. The anti-reference side bearing box that supports the shaft is detachably joined.

  The means adopted by the slab guide device for continuous casting equipment according to claim 3 of the present invention is the slab guide device for continuous casting equipment according to claim 1 or 2, wherein the rigid member The non-reference side bearing box is detachably joined.

  The means adopted by the slab guide device for continuous casting equipment according to claim 4 of the present invention is the slab guide device for continuous casting equipment according to any one of claims 1 to 3, wherein the rigid member and A clearance adjusting means is interposed between the bearing housing and the non-reference side bearing box.

  The means adopted by the slab guide device for continuous casting equipment according to claim 5 of the present invention is the slab guide device for continuous casting equipment according to any one of claims 1 to 4, wherein The joint surface with each of the anti-reference side bearing boxes is formed to coincide with the surface direction formed by each of the joint surfaces of the plurality of anti-reference side bearing boxes.

  The means adopted by the slab guide device for continuous casting equipment according to claim 6 of the present invention is the slab guide device for continuous casting equipment according to any one of claims 1 to 5, wherein In addition, a fluid passage passage is formed.

  The slab guide device of the continuous casting equipment according to claim 7 of the present invention is the slab guide device of continuous casting equipment according to claim 6, wherein the flow path is the roll or / and bearing box. A water supply header and / or a drainage header for passing cooling water for cooling the water is formed.

  The means adopted by the slab guide device of the continuous casting equipment according to claim 8 of the present invention is the slab guide device of continuous casting equipment according to claim 6, wherein the flow path is a secondary for cooling the slab. A water supply header for cooling water supplied to the cooling spray and / or an air supply header for cooling air is formed.

  The slab guide device for continuous casting equipment according to claim 1 of the present invention is such that each pair of rolls is pivotally supported by a bearing box via a bearing, and the bearing box of one roll is used as a reference side bearing box. The present invention relates to a slab guide device that is detachably provided on a common frame, and that is detachably connected to the reference side bearing box with a bearing box of the other roll as an anti-reference side bearing box.

  According to the slab guide device, the plurality of adjacent anti-reference side bearing boxes connect the plurality of anti-reference side bearing boxes to each other, and through the rigid member having bending rigidity with respect to the slab guide direction. Thus, in a relatively simple roll stand structure without tie rods, abnormal loads can be effectively distributed to a plurality of adjacent bearing boxes, and the stand rigidity can be dramatically improved.

  According to the slab guide device of the continuous casting facility according to claim 2 of the present invention, the rigid member removably joins a plurality of anti-reference side bearing boxes that pivotally support both ends of the other roll. Therefore, it can contribute to the improvement of the stand rigidity in the strand orthogonal direction in addition to the strand direction.

  Furthermore, according to the slab guide device for continuous casting equipment according to claim 3 of the present invention, since the rigid member detachably joins all the anti-reference side bearing boxes in the roll segment, the load caused by abnormal load Can be distributed throughout the roll segment to improve stand stiffness.

  Still further, according to the slab guide device for continuous casting equipment according to claim 4 of the present invention, a gap adjusting means is interposed between the rigid member and the non-reference side bearing box, so that the bearing box is manufactured. Absorption of errors and adjustment during roll repair are possible.

  According to the slab guide device of the continuous casting facility according to claim 5 of the present invention, the joint surfaces of the rigid member with the anti-reference side bearing boxes are formed by the joint surfaces of the plurality of anti-reference side bearing boxes. Since it is formed so as to coincide with the surface direction, the slab pass line can be applied to the roll segment corresponding to the arc portion.

  On the other hand, according to the slab guide device of the continuous casting equipment according to claims 6 to 8 of the present invention, a flow passage for fluid passage is formed in the rigid member, and the flow passage is formed by the roll or / and Water supply header and / or drainage header for passing cooling water for cooling the bearing housing, or water supply header or / and cooling air for the cooling water supplied to the secondary cooling spray for cooling the slab by the channel. Since the air supply header is formed, the rigid member can be prevented from being thermally deformed, but there is no need to separately provide a header for cooling water or cooling air.

  First, a slab guide device according to Embodiment 1 of the present invention will be described with reference to the drawings. 1 is a front view of a slab guide device of a continuous casting facility according to Embodiment 1 of the present invention, FIG. 2 is a sectional view according to Embodiment 1 of the present invention, and shows an arrow XX in FIG. 3 is a detailed explanatory view of the lower bearing box of FIG. 2, wherein a is a front view, b is a cross-sectional view taken along line YY of a, FIG. 4 is a detailed explanatory view of the upper bearing box of FIG. Is a front view, and b is a ZZ sectional view of a.

  FIG. 5 relates to the first embodiment of the present invention, and is a partial side sectional view showing another embodiment of the gap adjusting means (right side) between the rigid member and the non-reference side bearing box in FIG. FIG. 7 relates to the first embodiment of the present invention, and is a partial side sectional view showing still another embodiment of the gap adjusting means (right side) between the rigid member and the non-reference side bearing box of FIG. 2, and FIG. FIG. 8 is a front view of a slab guide device of a continuous casting facility showing another embodiment of the gap adjusting means of FIG. 1 according to the first embodiment of the present invention, and FIG. It is sectional drawing which shows view U-U.

  In addition, the slab guide apparatus of this example is installed in the constant circular arc part of a continuous casting equipment, and is provided with 4 pairs of rolls. And this invention is the slab guide apparatus of the continuous casting installation which guides the slab extracted from the casting_mold | template which consists of a structure explained in full detail through between the roll stands provided with several pairs of rolls.

  1 and 2, reference numeral 1 is a common frame, 2 is a lower roll that is a reference side roll, 3 is an upper roll that is an anti-reference side roll, 4 is a lower bearing box that is a reference side bearing box, and 5 is an anti-reference side It is an upper bearing box used as a bearing box. Then, a plurality of pairs in which the lower roll 2 and the upper roll 3 facing each other form a pair, that is, in these drawings, a roll segment including four pairs of rolls is formed.

  On the upper surface of the common frame 1, a pair of left and right lower bearing box seat surfaces 6 as viewed from the side are provided in a total of eight locations, and each pair of seat surfaces 6 extends in the direction of the center line of the arc as viewed from the front view. It is formed to face. The lower bearing box seating surface 6 is provided with a lower bearing box positioning key 7. The common frame 1 is attached to a reference side frame (not shown) of the continuous casting facility.

  Both the lower roll 2 and the upper roll 3 have a water internal cooling hole 8 formed in the core portion to form a water cooling structure, and rotary joints 9 are provided on both sides of the internal roll water cooling hole 8. And the bearing 10 is attached to the axial part of the both ends of the lower roll 2, and the lower bearing box 4 is attached via the bearing 10. FIG. A bearing 10 is also attached to the shafts at both ends of the upper roll 3, and the upper bearing box 5 is attached via the bearing 10.

  In addition, in this example, in order to raise the flow velocity of cooling water, the case where the core 11 is installed is illustrated. Further, this example is a case of a free roll, and when a drive roll is used, a universal spindle is attached to one end of the roll, and therefore, a return-type rotary joint may be installed instead of the rotary joint 9, and the drive The present invention is also applicable to a slab guide device provided with a roll.

  As shown in FIG. 3, the lower bearing box 4 has a cooling water passage 12 formed therein, and a slab side (that is, a roll side) of the lower bearing box 4 has a water-cooled jacket structure to block radiant heat from the slab 13. The temperature rise of the bush bearing 10 and the thermal deformation of the lower bearing box 4 are prevented. This eliminates the need for an exterior heat insulating plate. The lower bearing box 4 is fastened by lower bearing box fasteners (bolts and nuts) 14 with a lower bearing box positioning key 7 interposed on the lower bearing box seating surface 6 of the common frame 1.

  A lower bearing box shim 15 is provided between each lower bearing box seating surface 6 and the lower bearing box 4 of the common frame 1, and the roll alignment of the lower roll 2 is adjusted by the lower bearing box shim 15. Is done. There is also a method of adjusting the roll alignment by replacing the lower bearing box shim 15 with a taper liner. In FIG. 3, 16 is a cooling water supply port, and 17 is a drainage port.

  As shown in FIG. 4, the upper bearing box 5 has a cooling water passage 18 formed therein as in the lower bearing box 4, and the slab side (that is, the roll side) of the upper bearing box 5 has a water cooling jacket structure. The radiant heat from the slab 13 is cut off to prevent the temperature rise of the bearing 10 and the thermal deformation of the upper bearing box 5. This eliminates the need for an exterior heat insulating plate.

  The upper bearing box 5 has a liner 19, an upper and lower bearing box positioning key 20 and an upper and lower bearing box shim 21 interposed on the lower bearing box 4 so as to fix the upper and lower bearing box fasteners (bolts and nuts). 22 is fastened. The distance (roll gap) between the lower roll 2 and the upper roll 3 is adjusted by the shim 21 between the upper and lower bearing boxes. There is also a method of adjusting the roll gap by replacing the shim 21 between the upper and lower bearing boxes with a taper liner. In FIG. 4, reference numeral 23 denotes a cooling water supply port, and 24 denotes a drainage port.

  Further, the slab guide device according to the first embodiment of the present invention includes a plurality of adjacent upper bearing boxes 5 that are configured to connect the plurality of upper bearing boxes 5 to each other with a rigid member 31. The upper bearing box 5 is detachably joined via a fastener (bolt / nut) 32. The rigid member 31 is a rigid member that connects adjacent upper bearing boxes 5 and has bending rigidity with respect to the slab guide direction. By connecting the rigid member 31 to the upper bearing box 5 via the fasteners (bolts and nuts) 32, the lower bearing box 4 and the upper bearing box 5 serve as column bases and the joint between the lower bearing box 4 and the common frame 1. It is possible to make a rigid frame structure in which the rigid member 31 is a beam.

  For this reason, the rigidity with respect to the horizontal force in the slab guide direction can be increased, the displacement in the slab guide direction of the lower bearing box 4 and the upper bearing box 5 caused by the horizontal force can be reduced, The technical idea of the present invention is to obtain a rigid frame structure capable of reducing the stress generated in the lower bearing box fastener 14 by a horizontal force.

  For example, in the first embodiment of the present invention, the rigid member 31 includes a plurality of adjacent upper bearing boxes 5 (case A) only in the strand direction (that is, the line direction) or a plurality of adjacent only in the strand orthogonal direction. The upper bearing boxes 5 (case B) or all adjacent upper bearing boxes 5 (case C) in the roll segment can be joined as shown in FIGS.

In the case A, the stand rigidity in the strand direction (that is, in the line direction) is improved. In case B, the stand rigidity in the strand orthogonal direction is improved. Further, in the case C, since all the adjacent upper bearing boxes 5 in the roll segment are joined together, it is most preferable from the viewpoint of improving the rigidity of the entire stand and dispersing the abnormal force.

  Each case will be described in detail below with reference to FIGS. First, in the case A, the slab 13 is pulled out in the downstream direction by a slab drawing device (corresponding to reference numeral 49 in the previous FIG. 9). Assume that a large abnormal force is generated. Even in this case, the rigid member 31 joins a plurality of adjacent upper bearing boxes 5 in the strand direction (that is, the line direction) via the fasteners 32 to form a portal-shaped strong ramen structure. Therefore, such an abnormal pulling force generated in the upper bearing housing 4 and the lower bearing housing 5 is distributed to the other plurality of bearing housings 5 via the rigid member 31, and the bearing housing 4 (and further the bearing housing 4). The fall of the box 5) can be prevented.

  Next, the case B will be described by taking as an example a case where uneven cooling occurs on the right and left sides in the width direction of the slab 13 during casting. Due to such temperature imbalance, the slab 13 meanders (advances to the low temperature side) in the roll stand, and an external force in the direction perpendicular to the strand is generated in the stand. The lower bearing box 4 and the upper bearing box 5 are connected to a common frame and protruded in a columnar shape. The lower bearing box 4 and the upper bearing box 5 are relatively resistant to lateral loads in the strand orthogonal direction (that is, the direction orthogonal to the line). It is a fragile structure. In this respect, like the case B, a plurality of upper bearing boxes 5 adjacent to each other in the direction orthogonal to the strands are joined to each other, so that a stand structure strong against the lateral load can be obtained.

  Further, in the case C, as shown in FIG. 2, since all the adjacent upper bearing boxes 5 in the roll segment are joined to each other by the rigid member 31, a portal type strong ramen in both the strand direction and the strand orthogonal direction. Forming a structure. As a result, any abnormal load generated in the upper bearing box 4 and the lower bearing box 5 is distributed to the other plurality of bearing boxes 5 via the rigid member 31 to increase the rigidity of the entire roll segment. It is.

  On the other hand, a gap adjusting means composed of a taper liner 33 is interposed between the rigid member 31 and the upper bearing box 5, so that the manufacturing error of the bearing boxes 4 and 5 and the diameter of the rolls 2 and 3 at the time of repair are reduced. It is possible to adjust the gap size between the joining surface 31 a of the rigid member 31 and the joining surface 5 a of the upper bearing box 5. A shim may be provided in place of the taper liner 33. Alternatively, as shown in FIG. 5, a screw jack 34a using bolts and nuts, or a sleeve with a male thread on the outer periphery and a sleeve with a female thread on the inner periphery as shown in FIG. The screw jack 34b can be used.

  Further, since the upper bearing box 5 is arranged in an arc shape along the slab pass line shown in FIG. 11, the joint surface 5a with the rigid member 31 is assembled in a direction perpendicular to the arc center direction. It has been. Accordingly, the joint surface 31a with each of the upper bearing box 5 of the rigid member 31 is also formed to coincide with the surface direction formed by each of the joint surfaces 5a of the plurality of upper bearing boxes 5, which corresponds to the arc portion. It is preferable when applied to a roll segment. In addition, although the said rigid member 31 was demonstrated using the example made into the integral structure, you may divide | segment into 2 and may connect two upper bearing boxes 5 2 each.

  Further, as a gap adjusting means between the rigid member 31 and the upper bearing box 5, as shown in FIGS. 7 and 8, the bolt hole 31b provided in the rigid member 31 and the joint surface of the upper bearing box 5 are used. In the configuration in which the bolt hole 39a provided in the bracket 39 joined to the (upper surface) 5a by welding or the like is fastened by a fastener (bolt / nut) 32, the bolt hole 31b provided in the rigid member 31 is a long hole. You may form as.

  By forming the bolt hole 31b as a long hole in a direction substantially perpendicular to the joint surface 5a, even if there are some steps on each upper surface 5a of the upper bearing box 5, the long hole 31b absorbs the dimensional difference. Is possible. Conversely, such a gap adjusting means can be configured by using a bolt hole 39a provided in the bracket 39 as a long hole.

  As shown in FIG. 2, the rigid member 31 is formed with two flow paths 35a and 35b for fluid passage in the pass line direction. Of these, one flow path 35a forms a water supply header for passing cooling water for cooling the rolls 2 and 3, and the other flow path 35b forms a cooling water drainage header after the cooling. .

  That is, as schematically shown by a one-dot chain line in FIG. 2, a plurality of water supply ports (not shown) provided in the water supply header 35 a and a rotary joint 9 attached to the left shaft end of the rolls 2 and 3. And a plurality of water collecting ports (not shown) provided in the drainage header 35b in parallel, respectively. The cooling water after cooling is collected in the drain header 35b and then drained.

  Thus, since each of the flow paths 35a and 35b forms a water supply header and a drainage header for passing cooling water for cooling the rolls 2 and 3, the rigid member 31 is, of course, the roll 2 , 3 can be prevented, and there is no need to separately provide a water supply header or a drainage header. In the above description, the flow path 35a is described as a water supply header and the flow path 35b is described as a drainage header. However, there is no problem even if it is reversed. Further, both the flow path 35a and the flow path 35b may be used as a water supply header or a drainage header.

  Next, a slab guide device for continuous casting equipment according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 9 relates to the second embodiment of the present invention and is a cross-sectional view taken along the line XX of FIG. However, the second embodiment of the present invention differs from the first embodiment in that the cooling target using the flow paths 35a and 35b formed in the rigid member 31 is different. Since the configuration is exactly the same as in the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and different points will be described.

  That is, each flow path 35a and 35b of the slab guide device according to the first embodiment forms a water supply header or / and a drainage header for cooling the rolls 2 and 3, whereas the present embodiment. The flow paths 35a and 35b of the slab guide device according to No. 2 form water supply headers and / or drainage headers for cooling the bearing boxes 5 and 6, respectively.

  Then, a plurality of water supply ports (not shown) provided in the water supply header 35a are connected in series to a plurality of water collection ports (not shown) provided in the drainage header 35b through an intermediate header 38. The cooling water after cooling is collected in the drain header 35b and then drained. That is, as schematically shown by a one-dot chain line in the figure, “water supply header 35a → upper bearing box (left side) 5 → lower bearing box (left side) 4 → intermediate header 38 → lower bearing box (right side) 4 → upper bearing Box (right side) 5 → drain header 35b ”.

  Thus, since the flow paths 35a, 35b form a water supply header or / and a drainage header for passing cooling water for cooling the bearing boxes 4, 5, the rigid member 31 is, of course, While thermal deformation of the bearing boxes 4 and 5 can be prevented, there is no need to separately provide a water supply header or a drainage header. In the second embodiment, the positions of the water supply port and the drain port of the lower bearing box 4 and the upper bearing box 5 shown in FIG. 9 are the positions of the water supply port and the drain port shown in FIGS. This is an example of connecting pipes that are reversed.

  Next, a slab guide device for continuous casting equipment according to Embodiment 3 of the present invention will be described with reference to FIG. FIG. 10 relates to Embodiment 3 of the present invention and is a cross-sectional view taken along line XX of FIG. However, the third embodiment of the present invention differs from the first embodiment in that the cooling target and the cooling means using the flow paths 35a and 35b formed in the rigid member 31 are different. Since the configuration is exactly the same as in the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and different points will be described.

  That is, each flow path 35a and 35b of the slab guide device according to the first embodiment forms a water supply header or / and a drainage header for cooling the rolls 2 and 3, whereas the present embodiment. Each of the flow paths 35 a and 35 b of the slab guide device according to 3 forms a water supply header and / or an air supply header for cooling the slab 13.

  Then, as schematically shown by a one-dot chain line in FIG. 10, a plurality of secondary cooling nozzles respectively provided between a plurality of water supply ports (not shown) provided in the water supply header 35 a and the upper roll 3. 36 and a plurality of air supply ports (not shown) provided in the air supply header 35b and a plurality of the secondary cooling nozzles 36 are connected and supplied with air. Thus, the slab cooling spray 37 is ejected from the secondary cooling nozzle 36 to cool the slab 13.

  In the above description, the flow path 35a has been described as a water supply header and the flow path 35b has been described as an air supply header. Moreover, both the flow path 35a and the flow path 35b may be used as a water supply header or an air supply header.

  Thus, each of the flow paths 35a, 35b forms a water supply header and / or an air supply header for supplying cooling water and air for cooling the slab 13, respectively. While heat deformation of 31 can be prevented, it is not necessary to separately provide a water supply header or an air supply header.

  As described above, according to the slab guide device of the continuous casting equipment according to the present invention, each pair of rolls is supported by a bearing box via a bearing, and the bearing box of one roll is continuously used as a reference side bearing box. In the slab guide device that is detachably provided on the common frame of the casting equipment and the bearing box of the other roll is the non-reference side bearing box, and is detachably connected to the reference side bearing box, a plurality of adjacent anti-references Since the side bearing box connects these anti-reference side bearing boxes to each other and is detachably joined via a rigid member having bending rigidity with respect to the slab guide direction, the abnormal load is reliably adjacent. It can be dispersed in the bearing housing, and the stand rigidity can be dramatically improved.

  Further, according to the slab guide device for a continuous casting facility according to the present invention, a flow passage for fluid passage is formed in the rigid member, and the cooling passage cools the roll or / and the bearing box. A water supply header and / or drainage header for passing water, or the flow path forms a water supply header for cooling water supplied to a secondary cooling spray for cooling the slab or / and an air supply header for cooling air As a result, it is possible to prevent thermal deformation of the rigid member, while eliminating the need to separately provide a header for cooling water or cooling air.

  In the above-described embodiment, the slab guide device in which a plurality of pairs (four pairs in this example) of the upper and lower rolls 2 and 3 are installed using the common frame 1 is described as an example. In addition, the bearing surface 6 for the lower bearing box may be formed on the reference side frame (not shown) of the continuous casting equipment, and the lower bearing box 4 may be provided there. Can enjoy.

  Moreover, although the case where the distance between the four pairs of rolls is relatively narrow was exemplified, this is because the slab guide device on the side close to the mold in the slab drawing direction of the continuous casting facility is taken as an example, and the installation location (for example, the vertical portion, Needless to say, an appropriate interval and number are selected depending on the curved portion, the horizontal portion, and the portions of these portions on the side closer to and far from the mold. Further, as a continuous casting facility, a common frame 1 such as a slab guide device using a common frame 1 and a portion provided with a slab guide device constituted by a pair of upper and lower rolls directly on a reference side frame of the continuous casting facility. It may be installed in a mixed manner with the part provided via the.

  In the drawings of Embodiments 1 and 2 (FIGS. 2 and 9), the cooling water to the rolls 2 and 3 and the bearing boxes 4 and 5 is supplied from the water supply header 35a through parallel piping, Although the example in which the rolls 2 and 3 and the bearing boxes 4 and 5 are cooled and then collected in the drainage header 35b by parallel piping has been described, the in-machine piping is complicated, and a large amount of cooling water is used to secure a flow rate. Is required. In order to solve this problem, the pipes to the rolls 2 and 3 and the bearing boxes 4 and 5 may be connected in series.

  For example, in FIG. 2, “water supply header 35a → lower bearing box (left side) 4 → lower roll 2 → lower bearing box (right side) 4 → upper bearing box (right side) 5 → upper roll 3 → upper bearing box (left side) 5 → Connect to the drainage header 35b ". Since the water supply port and drainage port of each cooling target (bearing box, roll) are close to each other, the connection pipe between the water supply port and the drainage port may be short, and the piping becomes simple. If the connection pipe is flexible (rubber hose / flexible tube), adjustment with a shim or a taper liner can be easily performed.

  Still further, in the drawings of Embodiments 1 and 2 (FIGS. 2 and 9), the two flow paths 35a and 35b are used as a water supply header and a drainage header, respectively, and rolls 2 and 3 and bearing box 4 are respectively used. As an example of cooling the slab 13 by using the two flow paths 35a and 35b as a water supply header and an air supply header in the above-described embodiment 3 (FIG. 10). As described above, four channels are used, and two of the channels are used as a feed header and a drain header to cool the rolls 2 and 3 and the bearing boxes 4 and 5, and the other two channels are supplied with water. It is also possible to cool the slab 13 as a header and an air supply header 35b.

It is a front view of the slab guide apparatus of the continuous casting equipment which concerns on Embodiment 1 of this invention. It is sectional drawing which concerns on Embodiment 1 of this invention and shows arrow XX of FIG. FIG. 3 is a detailed explanatory view of the lower bearing box in FIG. 2, wherein a is a front view and b is a YY sectional view of a. FIG. 3 is a detailed explanatory view of the upper bearing box of FIG. 2, in which a is a front view and b is a ZZ sectional view of a. FIG. 6 is a partial side cross-sectional view illustrating another example of the gap adjusting means (right side) between the rigid member and the non-reference side bearing box of FIG. 2 according to the first embodiment of the present invention. FIG. 10 is a partial side cross-sectional view illustrating still another example of the gap adjusting means (right side) between the rigid member and the non-reference side bearing box of FIG. 2 according to the first embodiment of the present invention. It is a front view of the slab guide apparatus of the continuous casting equipment which concerns on Embodiment 1 of this invention and shows the other Example of the clearance gap adjustment means of FIG. FIG. 9 is a cross-sectional view taken along the line U-U in FIG. 7 according to the first embodiment of the present invention. It is sectional drawing which concerns on Embodiment 2 of this invention and shows arrow XX of FIG. It is sectional drawing which concerns on Embodiment 3 of this invention and shows arrow XX of FIG. It is a front view which shows the outline | summary of a continuous casting installation. It is explanatory drawing of the slab guide apparatus of the continuous casting equipment which concerns on the prior art 1, Comprising: a is a front view, b is a side view. It is a front view of the slab guide apparatus of the continuous casting equipment which concerns on the prior art 2. It is WW sectional drawing of FIG.

Explanation of symbols

1: Common frame, 2: Lower roll, 3: Upper roll 4: Lower bearing box (reference side bearing box)
5: Upper bearing box (anti-reference side bearing box), 5a: Joint surface (upper surface) of upper bearing box
6: Seat surface for lower bearing box, 7: Positioning key for lower bearing box 8: Water cooling hole inside roll, 9: Rotary joint, 10: Bearing 11: Core, 12: Cooling water passage, 13: Slab 14: Bottom Fastener for bearing box, 15: shim for lower bearing box, 16: water supply port 17: drainage port, 18: cooling water passage, 19: liner 20: positioning key for upper and lower bearing box, 21: shim for upper and lower bearing box 22: Fastener between upper and lower bearing boxes, 23: Water supply port, 24: Drainage port 31: Rigid member, 31a: Joining surface of rigid member, 31b: Bolt hole 32: Fastener (bolt / nut), 33: Tapered liner 34a, 34b: Screw jack 35a: Channel (water supply header), 35b: Channel (drainage header, air supply header)
36: Secondary cooling nozzle, 37: Secondary cooling spray 38: Intermediate header 39: Bracket, 39a: Bolt hole

Claims (8)

  A slab guide device for continuous casting equipment that guides a slab drawn from a mold through a roll stand provided with a plurality of pairs of rolls, and each pair of rolls is supported on a bearing box via a bearing, A bearing box of one roll is detachably provided as a reference side bearing box on a common frame of a continuous casting facility, and a bearing box of the other roll is detachably connected to the reference side bearing box as an anti-reference side bearing box. In the slab guide device, a plurality of adjacent anti-reference side bearing boxes connect these anti-reference side bearing boxes to each other and are detachably joined via a rigid member having bending rigidity in the slab guide direction. A slab guide device for a continuous casting facility.   The slab guide device for continuous casting equipment according to claim 1, wherein the rigid member is detachably joined to a plurality of non-reference side bearing boxes that pivotally support both ends of the other roll.   The slab guide device for continuous casting equipment according to claim 1 or 2, wherein the rigid member removably joins all the anti-reference side bearing boxes in the roll segment.   The slab guide device for continuous casting equipment according to any one of claims 1 to 3, wherein a gap adjusting means is interposed between the rigid member and the non-reference side bearing box.   5. The bonding surface of each of the rigid members with the anti-reference side bearing box is formed so as to coincide with a surface direction formed by each of the bonding surfaces of the plurality of anti-reference side bearing boxes. A slab guide device for a continuous casting facility according to any one of the above.   The slab guide device for a continuous casting facility according to any one of claims 1 to 5, wherein a flow path for fluid passage is formed in the rigid member.   The continuous casting equipment according to claim 6, wherein the flow path forms a water supply header or / and a drainage header for passing cooling water for cooling the roll or / and the bearing box. Slab guide device.   The continuous casting equipment according to claim 6, wherein the flow path forms a water supply header for cooling water supplied to a secondary cooling spray for cooling the slab or / and an air supply header for cooling air. Slab guide device.

Images