JPH065747U - Tundish Utility Supply Device for Continuous Casting Machine - Google Patents

Abstract

(57) [Summary] [Purpose] In a tundish rotating continuous casting machine,
It is an object of the present invention to provide a utility supply device that can effectively supply utility even if the tundish circulates in one direction by 360 ° or more. A continuous casting machine having a ladle turret that holds a ladle and is rotatable about its center, and a tundish car that revolves around the ladle turret along a circular rail. Upper and lower rotary joints, a hollow utility supply member arranged to reach from the upper rotary joint of the ladle turret to the tundish on the tundish car, and swiveling together with the tundish car, and the upper and lower parts. A utility passage is provided on the rotary shaft so as to communicate with the rotary joint, and an external utility supply source is connected to the lower rotary joint of the ladle turret.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a tundish utility supply device for supplying utilities such as cooling water and argon gas required for tundish operation to a tundish of a continuous casting machine, especially a tundish when the tundish circulates on a circular orbit. Utility supply device.

[0002]

[Prior art]

 To cast molten steel into a mold in a continuous casting machine, the molten steel from the ladle is once received by a tundish, and the molten steel flow is constantly controlled and injected into the mold from a nozzle (immersion nozzle) at the bottom of the tundish. In recent years, along with the hot use of the tundish and the adoption of a prefilling system that injects molten steel into the tundish from just before the pouring position, smooth movement of the tundish and preparation time for reusing the tundish have been achieved. For the purpose of shortening, a continuous casting machine having a structure in which a tundish is circulated along a circular orbit has appeared (for example, Japanese Patent Publication No. 52-33049 and Japanese Patent Publication No. 53-40566). In order to use the tundish hot, it is necessary to constantly cool the tundish body with water, and when using the tundish circulation in a circular orbit, argon gas is supplied to the nozzle at the bottom of the tundish during the circulation and the residue is removed. It is required to prevent nozzle clogging due to the above. The conventional method of supplying utilities such as cooling water and argon gas to a tundish circulating on a circular orbit is to use a hose reel to connect a hose to the tundish from an external source to move the tundish. Along with that, he was supplying the utility while feeding the hose.

[0003]

[Problems to be solved by the device]

 To supply utility by connecting a hose from a hose reel to a tundish that revolves around a circular orbit, when the tundish reciprocates within an arc range of less than a certain value, the flexible hose bends and It is possible to supply the utility by feeding it out, but if the tundish rotates 360 ° or more on a circular orbit, the hose will be twisted and supply will be difficult. Especially when the tundish circulates and circulates only in one direction, it is impossible to supply the utility with a hose, and the hose must be replaced during the rotation.

The present invention relates to a continuous casting machine in which a tundish circulates on a circular orbit and is cast into a mold at a casting position in the middle of the tundish, regardless of the rotation position and rotation amount of the tundish. The purpose of the invention is to provide a utility supply device that can supply the utility through the shaft and can also make the space around the tundish compact.

[0005]

[Means for Solving the Problems]

 According to the present invention, in a continuous casting machine having a ladle turret that holds a ladle and is rotatable around the center, and a tundish car that rotates around the ladle turret along a circular rail. A rotary joint provided on the upper and lower portions of the rotary shaft of the ladle turret and an upper rotary joint of the ladle turret to reach the tundish on the tundish car, and the tundish. It has a hollow utility supply member that turns with the car and a utility passage that is provided on the rotary shaft so as to connect the upper and lower rotary joints, and the utility supply source outside the machine is the lower part of the ladle turret. A utility feeder connected to the rotary joint is provided. .

[0006]

【Example】

 Next, embodiments of the present invention will be described with reference to the drawings. 1 is a schematic plan view of a tundish circulation part of a continuous casting machine equipped with a tundish utility supply device according to an embodiment of the present invention, and FIG. 2 is a vertical view of a ladle turret rotation center of the embodiment of FIG. FIG. The ladle turret 1 has a pair of arms 3 extending from both sides in the diametrical direction of a central turning shaft 2 and holding the respective rails 4 and 4a at the tips thereof and being driven to rotate around the turning shaft. . Below the ladle turret 1, on the casting floor 5, two spaced circular rails 6 coaxial with the swivel axis 2 are installed, and on this rail 6 a tundish car 8 equipped with a tundish 7 is installed. The ladle turret 1 rotates in the same direction at the same speed as the rotation speed (angular speed). Here, the tundish car 8 is aligned so as to face the ladle 4 held by the ladle turret 1, and the molten steel in the ladle 4 is poured into the tundish 7 through the sliding nozzle 9 (Fig. 2) at the bottom of the ladle. It will be hot water. In FIG. 1, the tundish 7 and the tundish car 8 are shown only below one ladle 4 of the ladle turret 1, but they are also similarly positioned and arranged on the rail below the other ladle 4a. It

An upper rotary joint 10 is provided at the upper end of the swivel shaft 2 of the ladle turret 1, and a hollow utility supply arm 21 is provided from the upper rotary joint 10 to the upper end of a column 20 standing on each tundish car 8. ing. A utility injection pipe 22 that hangs down to the tundish 7 therebelow is connected to the tip of each utility supply arm 21. A lower rotary joint 23 is provided at the lower end of the rotary shaft 2 of the ladle turret 1, and the lower rotary joint 23 and the upper rotary joint 10 are connected by a utility pipe 24 passing through the inside of the rotary shaft 2. A utility supply source (not shown) outside the machine is connected to the lower rotary joint 23 via a hose or the like. The utilities such as cooling water and argon gas required for the normal operation of the tundish 7 are supplied from the utility source during operation of the tundish 7 from the lower rotary joint 23, the utility pipe 24, the upper rotary joint 10 and the hollow utility. It is supplied to the tundish 7 via the supply arm 21 and the utility injection pipe 22.

Slip rings 25, 26 are provided on the upper and lower parts of the rotary shaft 2, and the power supply for running or control signals to the tundish car 8 are supplied from an external power supply or a control panel. And to the tundish car 8 via a trolley wire 28 stretched between the support 27 of the ladle turret 1 and the tundish car 8.

The tundish 7 on the tundish car 8 traveling along the circular rail 6 faces the pouring position B at a predetermined position on the rail 6, and at this position, the immersion nozzle 12 at the bottom of the tundish (see FIG. 2). ) Is used to cast molten steel into the lower mold 13. As shown in FIG. 1, the prefilling start position A is about 90 ° before the turning center angle of the ladle turret 1 from the casting position B, and the plasma is applied to the outside of the circular rail 6 from the prefilling start position A to the casting position B. A traveling rail 15 of the torch carriage 14 is provided coaxially with the circular rail 6. The plasma torch carriage 14 carries the plasma torch 16 and reciprocates on the traveling rail 15 from the prefilling start position A to the pouring position B, but when moving forward, that is, when moving toward the pouring position B. The tundish car 8 moves at the same speed (angular velocity) as the tundish car 8. Reference numeral 17 is a ladle operation deck.

The ladle 4 containing molten steel is carried by a crane or the like, held at the tip of one arm of the ladle turret 1, and brought to the prefilling start position A. At the prefilling start position A, molten steel is started to be injected from the ladle 4 into the tundish 7 on the tundish car 8 below the ladle 4, and at the same time, the molten steel in the tundish is heated by the plasma torch 16 and the ladle turret 1 and tundish cover are also heated. -8 and the plasma torch carriage 14 are simultaneously activated and move to the pouring position B at the same speed. During this movement, the pouring from the ladle 4 and the heating of the molten steel by the plasma torch 16 are continued, and when a predetermined amount of molten steel is poured into the tundish 7, pouring into the mold is started at the pouring position B. It After the casting is started, the plasma torch carriage 14 returns to the original prefilling start position A. When the ladle 4 becomes empty during casting, the ladle turret 1 is rotated to move the empty ladle 4 to the retreat position C, which is 180 ° opposite to the prefilling start position A, and is replaced with a new ladle filled with molten steel in advance. . The exchange of the ladle 4 is repeated several times to continue casting. When it is necessary to hold and inspect the tundish 7 by continuous casting, the tundish car 8 is retracted together with the ladle turret 1 in the same direction as described above, that is, in the arrow direction of FIG. At this time, if the casting is to be continued continuously, a new tundish 7 is prepared at the prefilling start position A, and the used tundish 7 and the ladle 4 are retreated at the same time as the pouring position B is preliminarily set. On the other side, rotate the new ladle placed on the ladle turret 1 to the prefilling start position A, and start pouring from the new ladle 4 to the new tundish 7 and pouring it in the same way as described above. Meanwhile, the ladle 4, the tundish 7 and the plasma torch 16 are synchronously rotated to the pouring position B, and when the pouring position is reached, the pouring into the mold 13 is started immediately. It is possible to continue casting while the steel remains, and continuous casting is possible. Further, when the casting is temporarily interrupted when replacing the tundish 7, the used tundish 7 and the rade 4 are retracted to the retracted position, and the molten steel cast in the mold 13 is continuously cast as a cast piece. It will be pulled out of the machine. Then, when the next casting is carried out, a well-known method is used to prepare the casting such as inserting a dummy bar and sealing the mold for the next casting on the casting mold side. In addition, at the prefilling start position A during preparation for casting on the mold side, a new tundish 7 to be used for the next casting and a ladle 4 preliminarily filled with molten steel are prepared. Then, when the next casting is started, injection of molten steel from the prefilling start position A to the tundish and heating are started in the same manner as described above, and the molten steel is rotated to the casting position B. Then, when the casting position B is reached, the casting operation is started immediately.

FIG. 3 is a schematic plan view similar to FIG. 1 of a continuous casting machine showing another embodiment of the present invention. In FIG. 3, the same parts as those in FIG. 1 are designated by the same reference numerals, and the duplicate description of those parts will be omitted. A tundish transfer carriage rail 17 is installed adjacent to the retreat position C of the tundish car 8 after the casting operation is completed, and the tundish transfer carriage 18 is mounted on the transfer carriage rail 17. It is designed to travel back and forth from the evacuation position C to the lateral slag position D. The used tundish 7 transferred from the tundish car 8 onto the transfer cart 18 at the retreat position C is overturned by the tilting device 19 at the slag position D 1 to discharge the internal debris, and then the tundish again. It is returned from the dish transfer trolley 18 to the tundish car 8, moved to the prefilling start position A after the necessary maintenance and inspection at the intermediate position E, and moved from the ladle containing the new molten steel to the tundish 7. Prefilling is started. In this embodiment, the tundish 7 moves away from the locus of the circular rail 6 and moves from the retracted position C to the slag position D. Therefore, a take-up reel 30 is provided on the tundish car 8 so that the utility (cooling water, air, argon gas, electricity, etc.) can be supplied also to the tundish 7 which has moved to the slag position D. The utility supply hose or cable 31 can be wound and unwound, and the utility can be supplied to the tundish 7 at the slag position D as well.

[0012]

[Effect of device]

 As described above, according to the present invention, in a continuous casting machine in which the tundish rotates around a ladle turret along a circular orbit, even if the tundish continuously rotates in one direction, It is possible to supply utility, tundish car drive power, or various signals to the tundish via the rotary joint and slip ring provided on the rotating shaft of the turret, regardless of the tundish position or rotation amount. It can be supplied at any time during the operation of the dish to ensure smooth operation. By supplying through the rotary shaft of the ladle turret, there is no hindrance to the structure of the tundish circulation part, and there is the effect that the reliability of operation can be increased and compactness can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a circulation pouring device according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of the ladle turret cut along the turning center in the embodiment of FIG.

FIG. 3 is a schematic plan view of a circulation pouring device according to another embodiment of the present invention.

[Explanation of symbols]

 1 Ladle turret 4, 4a Ladle 6 Circular rail 7 Tundish 8 Tundish car 10 Upper rotary joint 14 Plasma torch trolley 15 Traveling rail 16 Plasma torch 18 Tundish transfer trolley 19 Tundish tilting device 20 Radle turret support 21 Utility supply Arm 22 Utility injection pipe 23 Lower rotary joint 24 Utility pipe 25,26 Slip ring 27 Ladle turret support 28 Trolley wire 30 Take-up reel A Prefilling start position B Casting position C Retreat position D Discharge position

Claims (1)

[Scope of utility model registration request] 1. A continuous casting machine having a ladle turret which holds a ladle and is rotatable around the center, and a tundish car which rotates about the ladle turret around a circular rail along a circular rail. And a hollow utility supply which is arranged so as to reach from the upper rotary joint of the ladle turret to the tundish on the tundish car and which swivels with the tundish car. A member and a utility passage provided on the rotary shaft so as to connect the upper and lower rotary joints to each other, and a utility supply source outside the machine is connected to a lower rotary joint of the ladle turret. Tundish of continuous casting machine Utility supply.