JP2006281259A - Apparatus for changing sliding nozzle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for changing sliding nozzles, which apparatus can change a plurality of sliding nozzle devices at the same time, and also can perform the partial change of the sliding nozzle devices. <P>SOLUTION: In the sliding nozzle changing apparatus for changing upper nozzles and plate portions in a plurality of the sliding nozzle devices having the upper nozzles, which are mounted to the bottom portion of a molten metal reservoir and are inserted into at least the molten metal reservoir, and the plate portions, the sliding nozzle changing apparatus comprises nozzle changing mechanisms having nozzle changing sections for changing the upper nozzles, which nozzle changing sections are individually arranged on a common movable carriage for a plurality of the sliding nozzle devices, and cleaning sections for cleaning the mounting portions for mounting the upper nozzles of the molten metal reservoir, and the nozzle changing sections are configured so as to turn between the mounting and dismounting position of the upper nozzles and the changing positions of the upper nozzles in the state that the cleaning sections face to the sliding nozzle devices. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sliding nozzle exchange device for exchanging a part or all of a sliding nozzle device provided at the bottom of a molten metal container.

As this type of sliding nozzle exchange device, for example, a swivel base is arranged on a sliding nozzle device for a molten metal container and a replacement device for attaching and detaching a refractory material therein, and an exchange head for removing the sliding nozzle on the swivel base, An exchange head for attaching a sliding nozzle is provided at a position of 180 °, and a structure having an upper nozzle mounting head and a porous plug mounting head at positions orthogonal to these is known (for example, see Patent Document 1). ).
Japanese Patent No. 311347 (page 3, FIG. 2)

  However, in the conventional example described in Patent Document 1, since the four types of heads, that is, the pair of replacement heads, the upper nozzle mounting head, and the porous plug mounting head are provided on the swivel base, the configuration of the entire replacement device is increased in size. Therefore, when the tundish is provided for two strands in which two sliding nozzle devices are provided, it is not possible to dispose an exchange device separately facing both sliding nozzle devices, and both sliding nozzle devices can be installed simultaneously. There is an unresolved issue that cannot be exchanged.

  Further, in the conventional example described in Patent Document 1, the sliding nozzle device is configured as an integral structure with the upper nozzle inserted into the tundish, and the fixed plate and the sliding plate that support it. Although the life of the upper nozzle is longer than the life of the sliding plate, it is necessary to replace the entire sliding nozzle device, and there is an unsolved problem that the cost increases and the replacement takes longer.

  Therefore, the present invention has been made paying attention to the unsolved problems of the conventional example described above, and provides a sliding nozzle replacement device capable of simultaneously replacing a plurality of sliding nozzle devices, and a sliding nozzle device. It is an object of the present invention to provide a sliding nozzle exchange device that enables partial replacement of the above.

  In order to achieve the above object, a sliding nozzle exchanging device according to claim 1 is mounted at the bottom of a molten metal container, and is disposed at least below the upper nozzle inserted into the molten metal container. A sliding nozzle exchanging device for exchanging upper nozzles and plate portions of a plurality of sliding nozzle devices having at least a fixed plate and a plate portion having a sliding plate slidable with respect to the fixed plate. Cleaning a nozzle replacement unit for replacing the upper nozzle and a mounting unit for mounting the upper nozzle of the molten metal container, which are individually arranged for the plurality of sliding nozzle devices on a common moving carriage. A nozzle replacement mechanism in parallel with a cleaning unit for performing the cleaning, wherein the nozzle replacement unit is configured such that the cleaning unit is a sliding nozzle. In a state in which facing the location is characterized by being configured to be rotatable between a desorption position and an upper nozzle exchanging position of the upper nozzle.

The sliding nozzle replacement device according to claim 2 is characterized in that, in the invention according to claim 1, the plate portion is configured to be separable from at least the upper nozzle.
Furthermore, the sliding nozzle exchanging device according to claim 3 is the invention according to claim 1 or 2, wherein the plate portion is detachably attached to a slide metal frame in which the slide plate is rotatable with respect to a slide mechanism. It is characterized by being supported.

Furthermore, the sliding nozzle replacement device according to claim 4 is the sliding nozzle replacement device according to any one of claims 1 to 3, wherein the nozzle replacement mechanism slides the nozzle replacement part and the cleaning part in the juxtaposition direction. It is characterized by having a dynamic drive unit.
Still further, the sliding nozzle replacement device according to claim 5 is the sliding nozzle replacement device according to any one of claims 1 to 4, wherein the nozzle replacement section includes an replacement rod inserted into the upper nozzle and the replacement rod. A turntable for rotating between the upper nozzle detachment position and the upper nozzle replacement position, and the turntable in the state where the replacement rod is at the upper nozzle detachment position, the replacement rod is attached to the sliding nozzle device. An advancing / retreating drive mechanism for advancing / retreating driving, an arbor hook portion for pulling out the upper nozzle provided on the tip side of the exchange rod, and a bottom portion of the upper nozzle fixed to the front side of the arbor hook portion, A nozzle insertion adapter to be mounted on the mounting portion is provided.

  A sliding nozzle replacement device according to a sixth aspect of the present invention is the sliding nozzle replacement device according to any one of the first to fifth aspects, wherein each of the nozzle replacement mechanisms includes the cleaning unit on the outer side of the movable carriage and the nozzle replacement unit on the inner side. When the nozzle replacement unit is set to the nozzle replacement position with the cleaning unit facing the sliding nozzle device, the upper nozzle is removed from the replacement rod and the replacement nozzle is newly installed. It is characterized in that an upper nozzle can be mounted.

  According to the present invention, a plurality of nozzle replacement mechanisms that are individually opposed to the plurality of sliding nozzle devices provided in the molten metal container are provided on a common movable carriage, and the upper nozzles are provided in each nozzle replacement mechanism. Since the nozzle replacement part that performs replacement and the cleaning part that cleans the mounting part of the upper nozzle are provided side by side, and the nozzle replacement part is configured to be rotatable between the upper nozzle replacement position and the upper nozzle replacement position, the nozzle After removing the upper nozzle from the molten metal container with the replacement part as the upper nozzle removal position, the nozzle replacement part is moved to the upper nozzle replacement position while the cleaning part is opposed to the sliding nozzle device and the upper nozzle is being cleaned. Rotate and replace the removed upper nozzle with a new upper nozzle, and after cleaning at the cleaning section is complete, rotate the nozzle replacement section to the upper nozzle removal position. By, by mounting the upper nozzle to the mounting portion, a plurality of sliding nozzle device, advantageously can be reliably performed in a short time replacement of the upper nozzle at the same time can be obtained.

  According to the invention of claim 2, since the plate portion is configured such that at least the upper nozzle and the fixed plate can be separated from each other, the operator can replace the upper nozzle, the fixed plate, and the sliding plate when replacing the sliding nozzle. It is possible to determine whether it is necessary to replace only the fixed plate and sliding plate by visually recognizing the moving plate, or whether the entire replacement including the upper nozzle is necessary. In the case where it is sufficient, only these replacements are performed, and when the entire replacement is necessary, the entire replacement can be performed, so that the replacement time of the sliding nozzle device can be shortened.

Further, according to the invention of claim 3, since the plate portion is detachably supported by the slide metal frame that can rotate with respect to the sliding mechanism, the replacement of the sliding plate is shortened. The effect that it can carry out easily in time is acquired.
Furthermore, according to the invention according to claim 4, the nozzle replacement mechanism includes the sliding drive unit that slides the nozzle replacement unit and the cleaning unit in the juxtaposed direction. The nozzle replacement part and the cleaning part can be made to face each other, and the upper nozzle removed by the nozzle replacement part can be individually replaced during cleaning by the cleaning part, and the upper nozzle replacement work can be easily performed in a short time. The effect that it can be performed is acquired.

  Still further, according to the invention according to claim 5, in the state where the exchange rod is at the upper nozzle attaching / detaching position on the turntable, the advance / retract drive mechanism is extended and the exchange rod is inserted into the upper nozzle so that the urban hook portion is After engaging the tip of the upper nozzle, the advance / retract drive mechanism is contracted to remove the upper nozzle from the mounting part, and then the turntable is rotated to set the replacement lot to the upper nozzle replacement position so that the operator can move the upper nozzle. Remove and attach the new upper nozzle to the nozzle insertion adapter of the replacement rod, and then turn the turntable again to the upper nozzle attachment / detachment position. By extending the drive mechanism, the upper nozzle can be mounted on the mounting portion, and the upper nozzle can be easily replaced in a short time. Door can be.

  Further, according to the invention of claim 6, since each nozzle replacement mechanism has the cleaning part disposed on the outer side of the movable carriage and the nozzle replacement part on the inner side, the cleaning part faces the mounting part. By setting the nozzle replacement part to the nozzle replacement position, the upper nozzle removed by the operator at the central part of the moving carriage can be replaced with a new upper nozzle, making it easy to replace the old and new nozzles. The effect that it can be obtained.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. In the figure, 1 is a tundish as a molten metal container, and sliding nozzle devices 2L and 2R are mounted on two left and right sides of the bottom. ing.
Then, when the tundish 1 is rotated 90 degrees to the nozzle inspection position with the bottom surface being the vertical surface, the sliding nozzle replacement device 20 performs nozzle replacement of the sliding nozzle devices 2L and 2R.

Each of the sliding nozzle devices 2L and 2R is enlarged as shown in FIGS.
A spout 3 formed at the bottom of the tundish 1, a nozzle receiving brick 4 as a mounting portion for mounting a later-described upper nozzle 7 formed on the inner surface of the tundish 1 of the spout 3, and the tundish 1 2 fixed around the spout 3 on the bottom surface in FIG. 2, and a nozzle replacement portion described later at four corners in a substantially square shape as viewed in FIG. 2 fixed on the lower surface side of the fixing plate 5. The guide plate 6 is formed with a guide horn 6a directed downward, an upper nozzle 7 mounted on the nozzle receiving brick 4, and a plate portion 8 that supports the upper nozzle 7 from below. .

  The plate portion 8 includes an upper plate metal frame 10 as a fixed plate that holds the upper plate 9 that is fixed to the supporting fixed plate 5 and receives the lower part of the upper nozzle 7 at the center, and a lower side of the upper plate metal frame 10. The middle plate metal frame 12 that holds the middle plate 11 as a sliding plate at the center portion slidably disposed on the middle plate, and the fixed plate disposed at the lower center portion of the middle plate metal frame 12 A lower plate metal frame 14 that holds the lower plate 13, lock mechanisms 15 F and 15 R that are rotatably supported on the front and rear of the upper plate metal frame 10 to hold the lower plate metal frame 14 detachably, and tips The sliding mechanism 16 that holds the middle plate metal frame 12 rotatably and slides in the left-right direction, the lower nozzle 17 connected to the lower side of the lower plate 13, and the lower nozzle 17 are moved up and down. Possible support Rutotomoni, and an air cylinder 19 that is rotatably disposed in the drive motor 18a. Here, the upper nozzle 7, the upper plate 9, the middle plate 11, the lower plate 13, and the lower nozzle 18 are formed with openings that can communicate with each other to form a pouring hole 19. The pouring hole 19 is opened and closed by sliding the middle plate 11 with the sliding mechanism 16.

Here, the life of the upper nozzle 7 is set to be twice the life of the plate portion 8. For example, when the life of the plate portion 8 is 40 charges, the upper nozzle 7 has a life of 80 charges. The wall thickness is set in consideration of melting damage of the nozzle 7.
Further, as shown in FIG. 1, the sliding nozzle replacement device 20 includes a movable carriage 21 that can move in the left-right direction to a position facing the sliding nozzle devices 2L and 2R in a state where the tundish 1 is in the nozzle inspection position. The nozzle replacement mechanisms 22L and 22R are disposed on the movable carriage 21 at positions individually facing the sliding nozzle devices 2L and 2R.

  Each of these nozzle replacement mechanisms 22L and 22R has a nozzle replacement portion 23 that replaces the upper nozzle 7 of the sliding nozzle devices 2L and 2R, and a cleaning portion 24 that cleans the nozzle receiving brick 4 serving as a mounting portion. The nozzle replacement mechanisms 22L and 22R are arranged so as to be the left and right objects with the central position in the left and right direction of the movable carriage 21 so that the replacement part 23 is on the inside and the cleaning part 24 is on the outside.

  As clearly shown in FIGS. 5 and 6, the nozzle replacement unit 23 and the cleaning unit 24 slide in the left-right direction on the support frame 26 disposed on the upper surfaces of the plurality of columns 25 suspended on the movable carriage 21. It is attached to a horizontally movable frame 27 that is movably supported. By moving the horizontally movable frame 27 with a hydraulic cylinder 28, the nozzle replacement portion 23 is opposed to the sliding nozzle devices 2L and 2R, and The cleaning unit 24 is slid between a position facing the sliding nozzle devices 2L and 2R.

  As shown in FIGS. 6 and 7, the nozzle replacement unit 23 includes a fixed frame 31 that is supported on the lower side of the left-right moving frame 27 at a predetermined interval, and a linear guide device 32 that supports the fixed frame 31 in the front-rear direction. The front and rear direction moving frame 33 supported so as to be movable, that is, reciprocally supported with respect to the sliding nozzle devices 2L and 2R, the hydraulic cylinder 34 that drives the front and rear direction moving frame 33 forward and backward, and the lower surface of the front and rear direction moving frame 33 Rod support portion 38 having a turntable 35 disposed, an exchange rod 36 inserted into the above-described upper nozzle 7 supported on the lower surface of the turntable 35, and a guide bar 37 inserted into the guide horn 5. It consists of and. Here, as shown in FIG. 7, the turntable 35 includes a ring portion 35a fixed to the longitudinal movement frame 33, a table portion 35c supported on the inner peripheral surface of the ring portion 35a via a bearing 35b, The ring gear 35d is formed on the inner side of the table portion 35c, and a drive motor 35f is disposed on the rotating shaft and is supported by the front-rear moving frame 33. The pinion 35e meshes with the ring gear 35d. Then, the table 35c is rotated by the drive motor 35f from the nozzle attachment / detachment position where the rod support 38 is opposed to the sliding nozzle devices 2L and 2R to the nozzle replacement position rotated by 115 °, for example, in the central direction of the movable carriage 21. It is driven dynamically.

The rod support portion 38 is slidable in the front-rear direction with respect to a support plate portion 39 suspended from the lower surface of the turntable 35, guide bars 37 disposed at the four corners of the support plate portion. A sliding frame 40 supported by the sliding frame 40, a hydraulic cylinder 41 for sliding the sliding frame 40 in the front-rear direction, an exchange rod 36 protruding forward and attached to the center of the sliding frame 40, and the exchange rod An arbor hook portion 42 that is rotated between a storage position stored in an exchange rod disposed at the tip of 36 and an engagement position that extends outside the exchange rod and protrudes perpendicularly to the exchange rod; The arbor hook portion 42 is supported by supporting a hydraulic cylinder 44 that rotates through a wire 43 disposed in the exchange rod 36 and a bottom portion of the upper nozzle 7 fixed to an intermediate portion of the exchange rod 36. And a nozzle insertion adapter 45 to be mounted on section.
Further, the cleaning unit 24 is provided with a tuyere 51 for scraping off Al ₂ O _{3 and the} like adhering to the inner peripheral surface of the nozzle receiving brick 4 in place of the replacement rod 36 in which the turntable 35 and the replacement rod 36 are omitted. Except for the above, it has the same configuration as the nozzle replacement part 23, and the same reference numerals are given to corresponding parts, and the detailed description thereof is omitted.

Next, the operation of the above embodiment will be described.
Now, as shown in FIG. 9, the tundish 1 slides the middle plate 11 in one direction by the sliding mechanism 16 with the sliding nozzle devices 2L and 2R on the lower side and the lower nozzle 18 facing the molds 60L and 60R. With the pouring hole 19 closed, molten steel is poured from the ladle 61 through the long nozzle 62 into the tundish 1, and then the middle plate 11 is moved by the sliding mechanism 16. By sliding in the other direction to open the pouring hole 19, molten steel is supplied to the molds 60L and 60R to perform continuous casting.

  Thereafter, when, for example, the plate portion 8 of the sliding nozzle device 2L, 2R reaches the set life at the predetermined charge, the tundish 1 is tilted 90 ° as shown in FIG. After the slag is discharged, the movable carriage 21 is moved so that the nozzle exchange portions 23 of the nozzle exchange mechanisms 22L and 22R mounted thereon face the sliding nozzle devices 2L and 2R. The moving time to the fixed position of the moving carriage 21 is about 5 minutes.

  When the movable carriage 21 reaches the fixed position, the sliding nozzle replacement work is started simultaneously by the nozzle replacement mechanisms 22L and 22R. At this time, the nozzle replacement part 23 is maintained in a state in which the rods of the hydraulic cylinders 34 and 41 are contracted, and the tip of the replacement rod 36 is in a position sufficiently retracted from the sliding nozzle devices 2L and 2R as shown in FIG. There is a sufficient working space in front of the sliding nozzle devices 2L and 2R.

  In the sliding nozzle replacement operation, first, the air cylinder 17 is extended and the lower nozzle 18 is retracted, and then the drive motor 18a is driven, so that the lower nozzle 17 is poured as shown by a two-dot chain line in FIG. The lower plate metal frame 14 is removed by retracting clockwise from the position of the hole 19 and then the operator removing the locking mechanisms 15F and 15R of the sliding nozzle devices 2L and 2R as shown in the two-dot chain line as shown in FIG. Then, the lower plate 13 supported by the lower plate metal frame 14 is removed and replaced with a new lower plate 13.

Next, the middle plate metal frame 12 is rotated about 140 ° in the clockwise direction as shown by the two-dot chain line in FIG. 3, and the middle plate 11 supported by the middle plate metal frame 12 is removed to form a new middle plate. Then, the upper plate 9 supported by the exposed upper plate metal frame 10 is removed.
Next, the exposed upper nozzle 7 is cleaned with oxygen for about 3 minutes, and then a new upper plate 9 is mounted on the upper plate metal frame 10, and then the middle plate metal frame 12 is returned to the horizontal position before the lower plate metal The frame 14 is attached, and in this state, the lower plate metal frame 14 is locked by the lock mechanisms 15F and 15R, and then the lower nozzle 17 is rotated back to the pouring hole 19 position by the air cylinder 18 and then the air cylinder is contracted. The lower nozzle 17 is engaged with the lower plate 13 to complete the exchange of the plate portion 8.

  In this case, the replacement of the plate portion 8 takes about 3 minutes to remove the upper plate 9, the middle plate 11 and the lower plate 13, and 3 minutes to clean the upper nozzle with oxygen. The work can be completed in 12 minutes in total, 3 minutes for the work required to attach the middle plate 11 and the lower plate 13, and 3 minutes for the nozzle test time at the end of the replacement of the plate part 8. All work can be completed in 22 minutes including the reciprocation time of 10 minutes to the top, and the upper nozzle 7 and the plate part 8 are integrated as in the conventional example, and only the plate part 8 is replaced. 1 hour, which is the sliding nozzle replacement work time when this is impossible, can be greatly reduced.

On the other hand, when both the upper nozzle 7 and the plate part 8 reach the end of their lives, the tundish 1 is tilted in the same manner as described above, and then the lower plate 13 and the middle plate 11 are replaced and the upper plate 9 is removed. After the operation is performed, the oxygen cleaning operation of the upper nozzle 7 is performed, and then the replacement operation of the upper nozzle 7 is performed.
In this upper nozzle replacement operation, first, the rod of the hydraulic cylinder 34 is extended in a state where the arbor hook portion 42 provided at the tip of the replacement rod 26 is housed in the replacement rod 36, and the longitudinal movement direction frame 33 is moved to the sliding nozzle. Move to the device 2L, 2R side. At this time, the guide bar 37 formed on the rod support portion 38 is guided to the guide horn 6a provided on the guide plate 6 of the sliding nozzle device 2L, 2R, so that the positioning is performed accurately. The tip of the exchange rod 36 supported by the support portion 38 is inserted into the opening of the upper nozzle 7 by a predetermined amount as shown in FIG.

  In this state, by extending the rod of the hydraulic cylinder 41 provided in the rod support portion 38, the arbor hook portion 42 provided at the tip of the replacement rod 36 is moved to the upper nozzle 7 as shown in FIG. The rod of the hydraulic cylinder 44 is extended in this state, and the arbor hook portion 42 is rotated 90 ° clockwise through the wire 43 so that both ends of the arbor hook portion 42 are moved from the exchange rod 36. By rotating to the projecting engagement position and contracting the rod of the hydraulic cylinder 41 to the original position in this state, the arbor hook portion 42 is engaged with the upper end of the upper nozzle 7 as shown in FIG. Together, the upper nozzle 7 is pulled out from the nozzle receiving brick 4. Next, the rod of the hydraulic cylinder 34 is contracted to return to the standby position while holding the upper nozzle 7 at the tip of the replacement rod 36.

Next, the rod of the hydraulic cylinder 28 is contracted to move the left / right moving frame 27 to the inside of the moving carriage 21 so that the cleaning unit 24 faces the nozzle receiving bricks 4 of the sliding nozzle devices 2L and 2R. The rod of the hydraulic cylinder 34 is extended to bring the tuyere kelen 51 close to the nozzle receiving brick 3, and then the rod of the hydraulic cylinder 41 is stretched to adhere to the inner peripheral surface of the nozzle receiving brick 3 with the tuyere keren 51. Cleaning work to scrape off the remaining Al ₂ O ₃ etc.

In the meantime, in the nozzle replacement part 23, the turntable 35 is rotated by the drive motor 35d to the nozzle replacement position 115 ° inside as shown by the two-dot chain line in FIGS. 1 and 5, and held at the tip of the replacement rod 36. The upper nozzle 7 is in a state of facing the operator.
In this state, as shown in FIG. 8C, the upper nozzle 7 is pushed in until it comes into contact with the nozzle insertion adapter 45, and then the rod of the hydraulic cylinder 44 is contracted to store the arbor hook portion 42 in the replacement rod 36. In this state, the operator removes the upper nozzle 7A from the replacement rod 36, attaches a new upper nozzle 7 so that the lower part thereof is in contact with the nozzle insertion adapter 45, and then rotates the turntable 35 outward to replace the nozzle. Return from position to nozzle removal position.

  Thereafter, when the cleaning of the nozzle receiving brick 4 in the cleaning unit 23 is completed and the rods of the hydraulic cylinders 41 and 34 are contracted and the tuyere keren 51 returns to the standby position, the hydraulic cylinders in the nozzle replacement mechanisms 22L and 22R. As the rod 28 is extended, the left-right moving frame 27 moves outward, and the exchange rod 36 of the nozzle exchange part 23 returns to the state facing the nozzle receiving brick 4. In this state, the rod of the hydraulic cylinder 34 is moved. 8A, the tip of the exchange rod 36 is advanced to the vicinity of the bottom surface of the nozzle receiving brick 4, and the rod of the hydraulic cylinder 41 is extended from this state by the nozzle insertion adapter 45. A new upper nozzle 7 is inserted into the nozzle receiving brick 4.

  Thereafter, the rods of the hydraulic cylinders 41 and 34 are contracted to return to a standby position that secures a predetermined working space between the tip of the exchange rod 36 and the sliding nozzle devices 2L and 2R. In this state, the upper plate 9 is attached to the upper plate metal frame 11, then the middle plate metal frame 12 with the new middle plate 11 attached is returned to the horizontal position, and then the lower plate metal frame 14 is attached, and then the lower mechanism is lowered by the lock mechanisms 15F and 15R. The plate metal frame 14 is locked, and the lower nozzle 17 is returned to the normal position by the air cylinder 18a, and then the nozzle test is performed, thereby completing the complete replacement work of the upper nozzle 7 and the plate portion 8.

  In the complete replacement work of the upper nozzle 7 and the plate part 8, in addition to the work time 12 minutes required for the replacement work of the plate part 8, the work time for pulling out the upper nozzle 7 is 1 minute, and the nozzle receiving brick 4 in the cleaning part 24 is used. The total cleaning time is 4 minutes, the work time required to insert the new upper nozzle 7 is 6 minutes in total, and the total work time required for replacement is 18 minutes. Even if the reciprocating time of 10 minutes is added, the work can be completed in 28 minutes until all work is completed, and the work time of the conventional example can be reduced to half the work time.

Also in this case, since the replacement work of the upper nozzle 7 and the plate portion 8 of the sliding nozzle devices 2L and 2R is performed at the same time, the total work time is not increased and the total replacement can be performed in a short time.
Therefore, according to the above embodiment, the sliding nozzle devices 2L and 2R can be exchanged simultaneously by the nozzle exchanging mechanisms 22L and 22R provided in the movable carriage 21, and the exchanging operation of only the plate portion 8 and the upper portion of the plate portion 8 can be performed. All replacement work including the nozzle 7 can be performed alternately, and the work time in the entire replacement work can be greatly shortened. In addition, the work time can be further shortened when only the plate portion 8 is replaced. Therefore, it is possible to greatly reduce the temperature drop of the molten steel at the start of casting without lowering the production capacity of the continuous casting equipment, and it is possible to lower the steel output temperature and improve the slab quality.

  Further, in the above embodiment, the front-rear direction moving frame 33 is provided on the left-right direction moving frame 27, and the hydraulic cylinder 34 for moving the front-rear direction moving frame 33 is provided on the left-right direction moving frame 27. Since the rod support portion 38 is provided via 35, when the rod support portion 38 is rotated between the rod attaching / detaching position and the rod replacement position, it is not necessary to rotate the entire longitudinal moving frame 33. Therefore, the rod support portion 38 can be rotated in a small rotation space.

  In the above embodiment, the nozzle replacement unit 23 and the cleaning unit 24 constituting the nozzle replacement mechanisms 22L and 22R arranged on the movable carriage 21 are the nozzle replacement unit 23 on the inner side and the cleaning unit 24 is on the outer side. However, the present invention is not limited to this, and the nozzle replacement portion 23 may be disposed outside and the cleaning portion 24 may be disposed inside, and the nozzle replacement mechanism 22L. , 22R, the nozzle replacement part 23 and the cleaning part 24 may be arranged in the same manner.

  Further, in the above embodiment, the case where the sliding nozzle devices 2L and 2R are configured so that the upper nozzle 7 and the plate portion 8 can be individually replaced has been described. Even in the case where the upper nozzle 7 and the plate part 8 are removed at the same time by the nozzle replacement part 23 and replaced with new ones, they can be attached again. It can be.

Furthermore, although the case where the hydraulic cylinder was applied as the moving mechanism has been described in the above embodiment, the present invention is not limited to this, and any linear moving mechanism such as a rack and pinion can be applied.
Furthermore, the replacement timing of the middle plate 11 and the lower plate 13 with respect to the middle plate metal frame 12 and the lower plate metal frame 14 is not limited to being performed sequentially as in the above embodiment, but is performed simultaneously with the replacement of the upper plate 9. May be.

It is a whole lineblock diagram showing one embodiment of the present invention. It is the bottom view which replaced the partial cut surface of the sliding nozzle apparatus. FIG. 3 is a cross-sectional view of FIG. 2. It is a longitudinal cross-sectional view of FIG. It is a top view of a nozzle exchange mechanism. It is a rear view of a nozzle exchange mechanism. It is a side view which shows the nozzle exchange part of a nozzle exchange mechanism. It is explanatory drawing which shows the upper nozzle replacement | exchange operation | work in a nozzle replacement part. It is explanatory drawing which shows a continuous casting installation typically.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Tundish, 2L, 2R ... Sliding nozzle device, 4 ... Nozzle receiving brick, 7 ... Upper nozzle, 8 ... Plate part, 9 ... Upper plate, 10 ... Upper pele and metal frame, 11 ... Middle plate, 12 ... Middle Plate metal frame, 13 ... lower plate, 14 ... lower plate metal frame, 15F, 15R ... lock mechanism, 16 ... sliding mechanism, 20 ... sliding nozzle exchange device, 21 ... moving carriage, 22L, 22R ... nozzle exchange mechanism, 23 DESCRIPTION OF SYMBOLS Nozzle exchange part, 24 ... Cleaning part, 26 ... Support frame, 27 ... Horizontal movement frame, 28 ... Hydraulic cylinder, 33 ... Front / rear movement frame, 34 ... Hydraulic cylinder, 35 ... Turntable, 36 ... Exchange rod, 38 ... Rod support part, 42 ... Arbor hook part, 45 ... Nozzle insertion adapter, 51 ... Keren tuyere

Claims (6)

Mounted on the bottom of the molten metal container, at least an upper nozzle inserted into the molten metal container, at least a fixed plate disposed below the upper nozzle, and slidable with respect to the fixed plate A sliding nozzle exchange device for exchanging the upper nozzle and the plate portion of a plurality of sliding nozzle devices having a plate portion having a sliding plate,
Cleaning of the nozzle replacement part for replacing the upper nozzle and the mounting part for mounting the upper nozzle of the molten metal container, which are individually arranged for the plurality of sliding nozzle devices on a common moving carriage. A nozzle replacement mechanism in which a cleaning unit to be arranged is provided, and the nozzle replacement unit is disposed between the upper nozzle replacement position and the upper nozzle replacement position in a state where the cleaning unit faces the sliding nozzle device. A sliding nozzle exchanging device characterized by being configured to be rotatable.   The sliding nozzle replacement device according to claim 1, wherein the plate portion is configured to be separable from at least the upper nozzle.   3. The sliding nozzle replacement device according to claim 1, wherein the plate portion is detachably supported by a slide metal frame in which the sliding plate is rotatable with respect to a sliding mechanism.   The sliding nozzle according to any one of claims 1 to 3, wherein the nozzle replacement mechanism includes a sliding drive unit that slides the nozzle replacement unit and the cleaning unit in the juxtaposition direction. Exchange equipment.   The nozzle replacement unit includes an exchange rod inserted into the upper nozzle, a turntable for rotating the exchange rod between the attachment / detachment position of the upper nozzle and the upper nozzle exchange position, and the turntable. An advance / retreat drive mechanism for driving the exchange rod forward / backward with respect to the sliding nozzle device in a state where the exchange rod is at the attachment / detachment position of the upper nozzle, and an arbor hook for pulling out the upper nozzle provided on the tip side of the exchange rod And a nozzle insertion adapter for supporting the bottom portion of the upper nozzle fixed to the front side of the arbor hook portion and mounting the mounting portion on the mounting portion. The sliding nozzle replacement device according to item.   Each of the nozzle replacement mechanisms is configured such that the cleaning unit is disposed outside the movable carriage, the nozzle replacement unit is disposed inside, and the nozzle replacement unit is disposed in a state where the cleaning unit faces a sliding nozzle device. The upper nozzle can be removed from the replacement rod and a new upper nozzle can be attached to the replacement nozzle when the nozzle replacement position is set. The sliding nozzle replacement device described in 1.

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