JP4371846B2 - Roll attachment / detachment structure - Google Patents

Description

The present invention relates to a roll attaching / detaching structure that facilitates attaching / detaching work of a slab guide roll of a continuous casting facility.

Conventionally, as shown in FIG. 6, the slab 80 is manufactured using a continuous casting facility 81.
The continuous casting equipment 81 is provided with a mold 82 and a plurality of slab guiding guide rolls (hereinafter also referred to as guide rolls or rolls) 83 arranged on the downstream side of the mold 82. As shown in FIGS. 6 and 7, the guide roll 83 has a bearing box 86 on a segment frame 85 (hereinafter also referred to as a frame) attached to a segment fixing frame 84 having a radius of curvature R. A rotation shaft 87 of the guide roll 83 is rotatably attached thereto.
The guide roll 83 of the continuous casting equipment 81 is provided with a cooling water passage (not shown) at the center of the guide roll 83 so as to directly contact the high-temperature cast slab 80, and internal water cooling is performed. The rotary shaft 87 of the guide roll 83 protruding from the bearing housing 86 is provided with a rotary joint 88 for supplying and discharging cooling water. The connection (cooling) between the rotary joint 88 and the cooling water supply pipe 89 is provided. The same applies to the water discharge pipe), and the position accuracy of the connection point is not good, so the position of the flexible hose 90 has been conventionally adjusted. The connection between the rotary joint 88 and the flexible hose 90 and the connection between the cooling water supply pipe 89 and the flexible hose 90 are performed using joints 91 and 92 (see, for example, Patent Document 1).

Thereby, for example, when a crack or wear occurs in the surface portion of the guide roll 83 that is in contact with the moving slab at high temperature, the segment frame 85 including the guide roll 83 is removed from the continuous casting equipment 81, and the maintenance shop Then, after removing the flexible hose 90 from the rotary joint 88 of the guide roll 83, the bearing box 86 is removed from the segment frame 85, and the guide roll 83 is moved to the roll maintenance place. Then, the cracks generated on the surface portion of the guide roll 83 are removed by grinding (grinding), and then the surface of the guide roll 83 is made to be in a good state by overlaying, and the guide roll 83 is again attached to the segment frame 85. After installation, the flexible hose 90 is connected to the rotary joint 88.

Japanese Patent Laid-Open No. 8-1688859 (FIG. 3)

However, recent continuous casting equipment tends to reduce the pitch of a plurality of guide rolls installed from the viewpoint of high productivity and high quality. For this reason, the number of guide rolls increases as compared with the prior art, and as described above, the flexible hose is attached and detached in a very narrow space when the guide roll is attached to and detached from the segment frame in order to maintain the guide roll. It was necessary, workability was poor, and improvement of the workability was demanded.

The present invention has been made in view of such circumstances, and without losing the function of the rotary joint of the roll, it eliminates the need for the flexible hose itself that has become an obstacle when the roll is attached and detached, and makes the roll easy to attach and detach. It is an object of the present invention to provide a roll attaching / detaching structure.

The roll attachment / detachment structure according to claim 1, which meets the above-mentioned purpose, includes a rotary joint provided on a side of a plurality of rolls that convey while casting a slab manufactured by pouring molten steel into a mold, In the attaching / detaching structure of the roll for attaching / detaching the water supply pipe for supplying cooling water to the inside and the drain pipe for discharging the supplied cooling water,
Flange attached to the upper end portion of the water supply pipe and the drainage pipe , the shaft center of the connection port for the water supply pipe and the drainage pipe connection port of the rotary joint is arranged in the moving direction when the roll is attached and detached. A straight pipe portion that is inserted into a through-hole of an attachment member provided on the portion and pulled out from the attachment member when the roll is pulled up ;
Moreover, the straight pipe portion is fitted into the through hole with a gap, and a sealing material for sealing the gap is provided in the through hole .
2. The roll attaching / detaching structure according to claim 1, wherein a moving direction at the time of attaching / detaching the roll is determined by the mechanical structure, for example, substantially with respect to a mounting surface of a bearing box that rotatably supports a rotating shaft of the roll. The direction is perpendicular to (for example, a range of ± 5 degrees with respect to the vertical). Under these conditions, when removing and attaching the roll, in order to eliminate the need for fastening the flexible hose that has been used in the past, the connection and fitting between the rotary joint of the roll and the water supply and drain pipes should be It is necessary to carry out in a simple operation in the moving direction. For this reason, a straight pipe portion whose axial center is arranged in the moving direction when the roll is attached and detached is provided at the connection port for water supply piping and the connection port for drainage piping of the rotary joint.

Further, in the roll attachment / detachment structure according to claim 1, by providing a flange portion at the ends of the water supply pipe and the drainage pipe, an attachment member for guiding the straight pipe part to the water supply pipe and the drainage pipe can be attached. .

The roll attachment / detachment structure according to claim 2 is the roll attachment / detachment structure according to claim 1 , wherein the attachment member can be inserted with a bolt for fixing the attachment member to the flange portion, and the inner diameter thereof can be set. A mounting hole larger than the diameter of the bolt is provided, and the mounting member is movable with respect to the flange portion before the mounting member is fixed by the bolt.
The roll attachment / detachment structure according to claim 2, wherein the coupling between the rotary joint of the roll, the water supply pipe and the drain pipe is rough in manufacturing accuracy, so that misalignment is expected, and adjustment for the misalignment is also taken into consideration. It is necessary to keep. For this reason, by providing the adjustment mechanism for the misalignment, that is, the mounting member, with the mounting hole having an inner diameter larger than the diameter of the bolt, the mounting member can move with respect to the flange portion, and the sealing material and the straight pipe portion And the axial center position can be matched. As described above, by providing a dimensional margin in the mounting hole, misalignment can be absorbed in the dimensional margin when the bolts are fastened between the flange portion provided in the water supply pipe and the drain pipe and the mounting member.

Detaching structure of a roll according to claim 3, wherein, in the roll of the detachable structure according to claim 2, wherein the inner diameter of the mounting member is increased in diameter toward the loading direction of the straight pipe portion.
In the roll attachment / detachment structure according to claim 3, it is preferable that a portion of the attachment member having an enlarged inner diameter is provided at least at an end portion on a side where the straight pipe portion is inserted.

The roll attaching / detaching structure according to a fourth aspect is the roll attaching / detaching structure according to the second or third aspect , wherein the outer diameter of the straight pipe portion is reduced in the direction of insertion into the mounting member.
In the roll attachment / detachment structure according to claim 4, it is preferable that the reduced diameter portion of the straight pipe portion is provided at least at a charging side end portion of the straight pipe portion to the attachment member.

The roll attaching / detaching structure according to any one of claims 1 to 4, wherein a roll hose is provided with a straight pipe portion whose axial center is arranged in a moving direction when the roll is attached / detached. It becomes unnecessary. Thereby, the attachment / detachment work of the flexible hose at the time of roll maintenance or roll replacement becomes unnecessary, and the attachment / detachment work of the roll can be easily performed.

In addition, this roll attaching / detaching structure has a through-hole in which the straight pipe portion can be inserted with a gap, and a straight pipe is used by using an attachment member in which a sealing material is arranged on the inner surface side of the through-hole. Since it is attached to the water supply pipe and the drainage pipe, it is possible to guide the straight pipe part to the water supply pipe and the drainage pipe with a simple configuration, and to suppress and further prevent water leakage, Connection with drainage pipes can be implemented.

In the roll attachment / detachment structure according to claim 2, since the inner diameter of the bolt mounting hole is larger than the bolt diameter, for example, when the roll is installed, the straight pipe portion is mounted in the through hole of the mounting member. When inserted, the attachment member can be moved relative to the flange portion, and the straight pipe portion can be easily attached to the water supply pipe and the drain pipe. As described above, if the straight pipe portion is centered (aligned), it is not necessary to adjust the position when the roll is attached or detached in the subsequent roll maintenance work. Therefore, the flexible hose is not required, and the flexible hose can be removed.

Since the attachment / detachment structure of the roll according to claim 3 is such that the inner diameter of the attachment member is increased in the direction in which the straight pipe portion is inserted, when the straight pipe portion is inserted into the through hole, For example, even if there is a slight shift between the axial center of the through hole and the axial center of the straight pipe portion, the straight pipe portion can be inserted into the through hole.

In the roll attachment / detachment structure according to claim 4, since the outer diameter of the straight pipe portion is reduced in the direction of insertion into the mounting member, when the straight pipe portion is inserted into the through hole, for example, Even if there is a slight shift between the axial center of the through hole and the axial center of the straight pipe portion, the straight pipe portion can be inserted into the through hole.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is an explanatory view of the separation / attachment state of the water supply branch of the roll attachment / detachment structure according to the first embodiment of the present invention, FIG. 2 is an explanatory view of the connection state of the water supply branch of the attachment / detachment structure of the roll, FIG. 3 is an explanatory view of the entire roll to which the attaching / detaching structure of the roll is applied, FIG. 4 is an explanatory view of a straight pipe portion and an attaching member according to a modification of the attaching / detaching structure of the roll, and FIG. It is explanatory drawing of the connection state of the attachment or detachment structure of the roll which concerns on this form.

As shown in FIGS. 1 to 3, a roll attaching / detaching structure (hereinafter also simply referred to as an attaching / detaching structure) 10 according to the first embodiment of the present invention is used as a segment frame 11 of a continuous casting facility and molten steel as a mold. It poured to a plurality of installed so as to sandwich the slab 12 made from both sides, a plurality of rolls for conveying while guiding the slab 12 (slab guide guide roll, also referred to as guide rolls) applied to 13 attachment and detachment of the (See FIG. 6). Although this detachable structure 10 can be applied to any roll on both sides of the slab 12, the roll on the side (lower side) that supports the slab 12 will be described here.

As shown in FIGS. 1 to 3, the roll 13 is provided with a cooling water passage (not shown) in the inside thereof, and is configured to allow the cooling water to flow. A rotating shaft 14 is provided at the shaft center of the roll 13, and the rotating shaft 14 is rotatably supported by bearing boxes 15 of the roll 13 disposed at both ends in the longitudinal direction of the roll 13. The bearing housing 15 can be mounted and fixed to the segment frame 11 with a plurality of fixing bolts 16 (four in one embodiment in this embodiment). Thereby, positioning of the roll 13 with respect to the segment frame 11 is performed.

Rotating joints (also referred to as rotary joints) 17 and 18 that are substantially inverted L-shaped are rotatably provided on the rotating shaft 14 of the roll 13 that protrudes laterally from each bearing housing 15.
The rotary joint 17 disposed on the cooling water supply side is provided with a water supply branch connection port (an example of a water supply piping connection port) 19 on the upstream side, and the rotary joint 18 disposed on the drain side has a downstream side. A drainage branch connection port (an example of a drainage pipe connection port) 20 is provided on the side. The water supply branch connection port 19 and the drainage branch connection port 20 have their axial centers arranged in a direction of movement when the roll 13 is attached or detached, that is, in a direction substantially perpendicular to the rotation shaft 14 of the roll 13. Tube portions 21 and 22 are integrally attached.

The straight pipe portion 21 is provided in the segment frame 11 and is connected to a water supply branch pipe (an example of a water supply pipe) 24 branched from a water supply main pipe 23 for supplying cooling water to the inside of the roll 13. The straight pipe portion 22 is provided in the segment frame 11 and is connected to a drainage branch pipe (an example of drainage pipe) 26 branched from a drainage main pipe 25 for transporting cooling water discharged from the inside of the roll 13. Yes. The water supply branch 24 and the drainage branch 26 both have the same configuration, and therefore the water supply branch 24 will be described here.
The inner diameter of the water supply branch pipe 24 is smaller than the inner diameter of the water supply main pipe 23, and its axis is in the same direction as the moving direction when the roll 13 is attached and detached.

A flange portion 27 projecting toward the peripheral side is integrally attached to an upper end portion (downstream end portion) of the water supply branch 24, and an attachment member 28 is disposed on the flange portion 27.
The attachment member 28 has two attachment portions 29 and 30 arranged in a stacked manner, and a through hole having a circular cross section that can be inserted into the straight pipe portion 21 with a gap (for example, about 1 to 10 mm). 31 is formed in the thickness direction of the attachment member 28. The inner diameter of the through hole 31 is, for example, about 1 to 10 mm smaller than the inner diameter of the water supply branch 24.
A seal groove 32 is formed between the adjacent attachment portions 29 and 30 on the inner surface side of the through hole 31 formed by the two attachment portions 29 and 30, and a seal material 33 is installed in the seal groove 32. Has been.

The sealing material 33 is made of, for example, a synthetic rubber such as acrylonitrile butadiene rubber (NBR), an epoxy resin, a phenol resin, a silicon resin, or the like, and its inner diameter is larger than the outer diameter of the straight pipe portion 21. The outer diameter is smaller and larger than the inner diameter of the through hole 31 of the mounting member 28. In addition, although the sealing material 33 has a rectangular cross section, an O-ring can also be used.
As a result, displacement of the sealing material 33 can be prevented, and when the straight pipe portion 21 is inserted into the through hole 31, a gap is prevented from being formed between the sealing material 33 and the outer surface of the straight pipe portion 21. it can.

As shown in FIG. 4, for example, an O-ring (an example of a sealing material) 34 made of NBR may be installed in a seal groove 36 formed in the center in the longitudinal direction on the outer peripheral portion of the straight pipe portion 35. Is possible. At this time, since the O-ring is not installed on the attachment member 37, the attachment member 37 can be configured without being divided into two attachment portions as described above.
Further, the attachment member 37 is provided with an inclined portion 38 in which the inner diameter of the upper end portion of the attachment member 37 is increased in the direction in which the straight pipe portion 35 is inserted (that is, upward in this case). Thus, the straight pipe portion 35 can be easily guided to the through hole 39 formed in the thickness direction of the mounting member 37. The same effect can also be obtained by reducing the outer diameter of the front portion of the straight pipe portion 35 in the direction of insertion into the mounting member 37 (that is, downward here).

As shown in FIGS. 1 to 3, the mounting member 28 has a plurality of bolts 40 for fixing the mounting member 28 to the flange portion 27 at substantially equal intervals around the through hole 31 (this embodiment). In this embodiment, four mounting holes 41 are provided.
The inner diameter of the mounting hole 41 is, for example, about 2 to 10 mm larger than the diameter of the bolt 40, and the mounting member 28 can move relative to the flange portion 27 before the mounting member 28 is fixed by the bolt 40. It has become a structure.
A seal groove 42 is formed in the flange portion 27 that is a contact portion between the attachment member 28 and the flange portion 27 and faces the inner side of the attachment hole 41 of the attachment member 28. An O-ring 43 made of NBR is installed to prevent leakage of cooling water from the gap between the mounting member 28 and the flange portion 27.

Next, the attaching / detaching operation of the roll 13 with respect to the segment frame 11 will be described with reference to FIGS.
First, when cracks or wear occur on the surface portion of the roll 13 due to use, the fixing bolt 16 for fixing the bearing box 15 to the segment frame 11 is removed, the roll 13 is pulled up by using a conveying means, and the bearing box 15 and each rotation are rotated. The roll 13 is removed from the segment frame 11 together with the joints 17 and 18 (see FIG. 1). At this time, the straight pipe portion 21 is pulled out from the attachment member 28.
Thereby, it is not necessary to perform the operation of removing the flexible hose from the rotary joint as in the case where a conventional flexible hose has been used.

The roll 13 removed from the segment frame 11 is moved to a maintenance place after the bearing housing 15 and the rotary joints 17 and 18 are removed as necessary, and the cracks generated in the surface layer portion of the roll 13 are polished ( The surface state of the roll 13 is processed into a good state by finishing the build-up.
And after attaching the bearing box 15 and each rotary joint 17 and 18 to this roll 13, it moves to the segment frame 11 side again. At this time, the bolts 40 for fixing the attachment members 28 to the flange portions 27 of the water supply branch pipe 24 and the drainage branch pipe 26 are loosened in advance so that the attachment member 28 can move with respect to the flange portion 27 as necessary. It may be left.

The roll 13 is gradually lowered from above the segment frame 11 so that the joint surface position (よ う) of the bearing housing 15 and the joint surface position (▲) of the segment frame 11 coincide (see FIG. 1). At this time, the straight pipe portions 21 and 22 provided in the rotary joints 17 and 18 of the roll 13 are also lowered with respect to the through holes 31 of the attachment members 28 provided in the water supply branch pipe 24 and the drainage branch pipe 26.
Here, even when the shaft center of the sealing material 33 installed in the mounting member 28 and the shaft center of the straight pipe portions 21 and 22 do not coincide with each other, the flange can be provided with a dimensional margin of the mounting hole 41 formed in the mounting member 28. The attachment member 28 can be moved with respect to the portion 27 so that the axial center of the sealing material 33 and the axial center of the straight pipe portions 21 and 22 can coincide with each other.

And after positioning of the roll 13 with respect to the segment frame 11, the fixing bolt 16 and the volt | bolt 40 are each tightened, and the roll 13 is installed in the segment frame 11 (refer FIG. 2, FIG. 3).
Thereby, it is not necessary to perform the work of attaching the flexible hose to the rotary joint as in the case where a conventional flexible hose has been used.
From the above, the flexible hose itself, which has been a hindrance in the past, can be eliminated during the attaching / detaching operation of the roll 13, and the attaching / detaching operation of the roll 13 can be facilitated.

Next, a roll attachment / detachment structure (hereinafter also simply referred to as attachment / detachment structure) 50 according to the second embodiment of the present invention will be described. The roll attachment / detachment structure according to the first embodiment of the present invention described above. The same members as those in FIG.
As shown in FIG. 5, the roll 51 has substantially the same function as the above-described roll 13, and has a configuration in which a cooling water passage (not shown) is provided in the inside so that cooling water can flow. It has become. The cooling water passage has a double structure centering on the axis of the roll 51, and after the cooling water supplied from one side in the longitudinal direction of the roll 51 flows to the other side, the longitudinal direction of the roll 51 again. It is configured to flow to one side and be discharged.

For this reason, the water supply branch (an example of the water supply pipe) 52 and the drainage branch (an example of the drain pipe) 53 having substantially the same functions as those of the water supply branch 24 and the drainage branch 26 described above are provided in the longitudinal direction of the roll 51. It is arranged side by side. The water supply branch 52 and the drainage branch 53 are provided with the flange portion 27 and the attachment member 28 described above.
For this reason, the rotary joint 55 is rotatably provided on the rotating shaft 54 of the roll 51 protruding sideways from the bearing box 15 on one side.

As the rotary joint 55, a drainage branch connection port (an example of a drainage pipe connection port) 56 connected to the drainage branch pipe 53 is provided at the lower portion of the central portion in the longitudinal direction of the rotary joint 55. In addition, a conventionally known one provided with a water supply branch connection port (an example of a water supply pipe connection port) 57 connected to the water supply branch 52 can be used. The rotary joint 55 is of a two-system type, and the cooling water flowing into the roll 51 through the water supply branch pipe 52 through the rotary joint 55 is discharged to the drain branch pipe 53 through the rotary joint 55. belongs to.
The rotary joint includes two rotary joints having a water supply rotary joint connected to the water supply branch 52 and a drainage rotary joint connected to the drainage branch 53 by incorporating the water supply rotary joint inside. It is also possible to use what consists of a joint part.
The drainage branch connection port 56 and the water supply branch connection port 57 are straight pipes whose axial centers are arranged in a direction of movement when the roll 51 is attached or detached, that is, in a direction substantially perpendicular to the rotation shaft 54 of the roll 51. Portions 58 and 59 are integrally attached.
Thereby, each straight pipe part 58 and 59 can be inserted in the through-hole 31 of the attachment member 28.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included. For example, a case where the roll attachment / detachment structure of the present invention is configured by combining some or all of the above-described embodiments and modifications is also included in the scope of the right of the present invention.
Moreover, in the said embodiment, although the case where the attachment or detachment structure of a roll was applied to the roll arrange | positioned at the side which supports a slab, it was obviously possible to apply to the roll which presses a slab from the top. is there.

It is explanatory drawing of the separated state of the water supply branch pipe of the attachment or detachment structure of the roll which concerns on the 1st Embodiment of this invention. It is explanatory drawing of the connection state of the water supply branch pipe of the attachment or detachment structure of the roll. It is explanatory drawing of the whole roll to which the attachment / detachment structure of the roll is applied. It is explanatory drawing of the straight pipe part and attachment member which concern on the modification of the attachment or detachment structure of the roll. It is explanatory drawing of the connection state of the attachment or detachment structure of the roll which concerns on the 2nd Embodiment of this invention. It is explanatory drawing of a continuous casting installation. It is explanatory drawing of the connection state of the attachment or detachment structure of the roll which concerns on a prior art example.

Explanation of symbols

10: Roll attachment / detachment structure, 11: Segment frame, 12: Cast slab, 13: Roll, 14: Rotating shaft, 15: Bearing box, 16: Fixing bolt, 17, 18: Rotary joint, 19: Connection port for water supply branch (Connection port for water supply piping), 20: connection port for drainage branch (connection port for drainage piping), 21, 22: straight pipe part, 23: water supply main pipe, 24: water supply branch pipe (water supply pipe), 25: drainage main 26: drainage branch pipe (drainage pipe), 27: flange portion, 28: mounting member, 29, 30: mounting portion, 31: through hole, 32: seal groove, 33: seal material, 34: O-ring (seal material) ), 35: straight pipe portion, 36: seal groove, 37: attachment member, 38: inclined portion, 39: through hole, 40: bolt, 41: attachment hole, 42: seal groove, 43: O-ring, 50: roll Detachable structure, 51: roll, 52: water supply branch (supply Piping), 53: drainage branch (drainage piping), 54: rotary shaft, 55: rotary joint, 56: drainage branch connection port (drainage connection port), 57: water supply branch connection port (water supply piping connection port) ), 58, 59: Straight pipe section

Claims (4)

Rotating joints provided on the side portions of a plurality of rolls for conveying a cast slab produced by pouring molten steel into a mold while guiding it, a water supply pipe for supplying cooling water to the inside of the roll, and the supplied cooling In the attaching / detaching structure of the roll for attaching / detaching the drainage pipe for discharging water,
Flange attached to the upper end portion of the water supply pipe and the drainage pipe , the shaft center of the connection port for the water supply pipe and the drainage pipe connection port of the rotary joint is arranged in the moving direction when the roll is attached and detached. A straight pipe portion that is inserted into a through-hole of an attachment member provided on the portion and pulled out from the attachment member when the roll is pulled up ;
In addition , the roll attaching / detaching structure is characterized in that the straight pipe portion is fitted into the through hole with a gap, and a sealing material for sealing the gap is provided in the through hole . 2. The roll attachment / detachment structure according to claim 1 , wherein a bolt for fixing the attachment member to the flange portion can be inserted into the attachment member, and an inner diameter thereof is larger than a diameter of the bolt. And the attachment member is movable with respect to the flange portion before the attachment member is fixed by the bolt. 3. The roll attaching / detaching structure according to claim 2 , wherein an inner diameter of the attachment member is increased in a direction in which the straight pipe portion is inserted. The roll attaching / detaching structure according to any one of claims 2 and 3 , wherein an outer diameter of the straight pipe portion is reduced in a direction of insertion into the mounting member. Detachable structure.

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