JPH06170503A - Device for exchanging ladle in continuous casting equipment - Google Patents

Abstract

PURPOSE:To arrange a line directly rolling a continuously cast slab at the high temp. condition at a low cost by providing a ladle lifting drive device and constituting the ladle so as to be possible to deliver between a lifting support body descended on a lifting rail and a ladle conveying means on the floor surface. CONSTITUTION:At the time of pouring the molten metal into a tundish by stopping the ladle 1 supported to one set of the lifting support bodies 15A, 15B through support yorks 17A, 17B to a casting position, by driving the ladle lifting drive devices 20A, 20B, the other lifting support body is descended to the lower part of the supporting frame along the lifting rail 18 from the supporting rail 13B. After delivering the empty ladle to the ladle conveying means 3 on the floor surface, the ladle incorporating the molten metal conveyed on the floor surface through the ladle conveying means 3 is received in the support york and the lifting support body is lifted to the supporting rail 13B from the lifting rail 18 to support the ladle to a swing table 12. After completing the pouring of molten metal in the ladle at the casting position, by rotating the swing table, the new ladle is swingly shifted to the casting position and the pouring of molten metal is started.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladle exchanging device for a continuous casting facility, which holds a ladle carried on a floor surface from a steel mill and supplies molten metal to a mold through a tundish.

[0002]

2. Description of the Related Art A conventional continuous casting facility is arranged in a yard of a steelmaking plant, and a slab cast by the continuous casting facility is cooled and then conveyed to a rolling mill away from the steelmaking plant and heated. After being placed in a furnace and reheated, it was sent to a rolling mill for roll forming.

In a conventional continuous casting facility, two ladles (ladles) are supported at symmetrical positions and swiveled between a pouring position above the mold and the tundish and a retracting position on the opposite side. There is a ladle exchange device that allows the ladle to be loaded into and unloaded from the ladle exchange device by a large overhead crane installed at a steel mill. And the ladle changer was being transported.

[0004]

By the way, in recent years, due to reasons such as energy saving measures, cost reduction, and properties of continuously cast slabs and improvement of accuracy, the cast slabs are kept in a high temperature state in a corner portion in a heating furnace. A production line layout is being adopted in which only the chisel is heated and then sent directly to the rolling mill.

However, when adopting this layout and installing a continuous casting facility in a rolling mill, there is a problem that a large overhead crane installed in a steel mill cannot be used and there is no suitable ladle transporting means. It was

Therefore, it is possible to transport the ladle at a predetermined distance by using, for example, a trolley, and the conventional ladle exchange device is provided with a means for delivering the ladle that has been transported on the work floor. However, there is a problem that the equipment cost becomes extremely high when an overhead crane capable of hoisting a ladle is installed in a rolling mill for delivery.

The present invention solves the above problems and can easily deliver a ladle conveyed by a trolley from a steel mill, and directly supplies a high temperature slab after continuous casting to a rolling mill. It is an object of the present invention to provide a ladle changing device in a continuous casting facility that can realize a production line easily and at low cost.

[0008]

In order to solve the above problems, a ladle changing device in a continuous casting facility according to the present invention is capable of rotating around a vertical axis on a support stand erected on the floor. A swivel base is provided, and vertical support rails are respectively arranged at a plurality of outer peripheral portions of the swivel base, and an elevating and lowering support body having support yokes that are respectively vertically movable on the support rails and capable of supporting a ladle is provided. Provided, on the side of the support base,
An elevating rail is provided in the vertical direction in which one elevating support is arranged so as to be continuous with the other supporting rails of the swivel at a position stopped at the casting position, and the elevating support is vertically movable to support the elevating support. A ladle elevating and lowering drive device capable of ascending and descending along the rail and the elevating rail is provided, and the ladle can be delivered between the elevating and lowering support body descended on the elevating rail and the ladle conveying means on the floor surface. Is.

[0009]

In the above structure, when the ladle supported by one lifting support body through the support yoke is stopped at the casting position and pouring into the tundish, the ladle lifting drive device is driven to Lowering the lifting support from the support rail along the lifting rail to the lower part of the support stand (after passing the empty ladle to the ladle carrier on the floor) The ladle containing the molten metal that has been conveyed is received by the support yoke, and the lifting support is raised from the lifting rail to the support rail to support the ladle on the swivel base. Then, after the pouring of the ladle at the casting position is completed, the swivel base is rotated to swivelly move the new ladle to the casting position to start pouring.

Thus, the ladle carried by the ladle carrying means on the floor can be easily delivered to the ladle changing device without a large overhead crane in the installation yard of the continuous casting facility. Moreover, since the ladle is transported on the floor surface, the ladle can be easily transported over a long distance, and the continuous casting equipment, which used to be located in the yard of the steel mill, can be moved to the yard of the rolling mill away from the steel mill. A line for directly rolling continuously cast slabs at a high temperature can be installed easily and at low cost.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a continuous casting facility equipped with a ladle changing device according to the present invention will be described below with reference to the drawings.

This continuous casting facility, as shown in FIG.
Ladle 1 supplied with molten metal from a steel mill converter or electric furnace
The steel receiving cart 3 (conveying means) that carries the vehicle and travels on the floor 2 from the steel mill and conveys it to the yard of the rolling mill.
A ladle changing device 4 for holding and rotating the ladle 1 of the stand, a tundish 6 arranged on the tundish car 5 for receiving the molten metal from the ladle 1, and a molten metal from the tundish 6 through a nozzle. It is provided with a mold 7 to be poured and a roll device 8 for guiding a cast piece continuously cast by the mold 7.

In the ladle changing device 4, a swivel base 12 which is rotatable around a vertical axis by a swivel drive device 10 is arranged on a support base 11 which is erected on the floor surface 2. A pair of left and right support rails 13A and 13B, which are inclined so that their lower ends are on the outside, are respectively arranged at the 180 ° symmetrical positions in the vertical direction. This support rail 13A,
Elevating supports 15A and 15B that can move up and down via guide rollers 14A and 14B are arranged on 13B, and these lifting supports 15A and 15B are mounted via load cells 16A and 16B for detecting the amount of molten metal. A pair of left and right support yokes 17A and 17B for supporting the pan 1 are provided.

Further, at the retracted position B on the opposite side of the pouring position A of the support frame 11, when the swivel base 12 stops one lifting support 15A corresponding to the casting position A, the retracted position B is set. A pair of left and right elevating rails 18 is vertically installed up to the floor surface 2 so as to be continuous with the other supporting rail 13B.

Further, on the upper part of the swivel base 12, lift supporters 15A and 15B can be lifted and lowered along the support rails 13A and 13B and the lift rails 18 via lift cords 19A and 19B, respectively. Drive unit)
20A and 20B are arranged, and a winch 20 for raising and lowering
A hoisting line 19 wound around each drum 20a of A and 20B
A and 19B are extended downward through the guide sheaves 21A and 21B, wound around the movable sheaves 22A and 22B provided on the elevating supports 15A and 15B, and then connected and fixed to the guide sheaves 21A and 21B side. There is.

A support rail 13 for the swivel base 12 is also provided.
Between the A and 13B, as shown in FIG.
Stopper devices 23A and 23B for receiving and positioning A and 15B from below are respectively provided. The stopper devices 23A and 23B are stopper cylinders 23a mounted obliquely upward and outward from the swivel base 12.
A receiving member 23b capable of contacting the lower surfaces of the elevating and lowering supports 15A and 15B is attached to the rod, and the receiving member 22b is retracted obliquely downward by contracting the stopper cylinder 22a, and the elevating and lowering supports 15A, 15B can be lowered.

Next, the operation of the ladle changing device 4 will be described. As shown in FIG. 1, the ladle 1 is held by the supporting yoke 17A of the lifting / lowering support base 15A and stopped at the casting position A, and the empty lapping after pouring is performed on the supporting yoke 17B of the other lifting / lowering support body 15B. The pot 1 is held. From this state,
The molten metal is supplied from the ladle 1 at the casting position A to the tundish 6 through the long nozzle 1a, and further, the molten metal is supplied from the tundish 6 through the immersion nozzle 6a into the mold 7. Then, the molten metal supplied into the mold 7 is cooled to form a slab and is guided by the roll device 9 to continuously cast the slab.

During this casting, the stopper device 23B is released, and the lifting winch 20B is driven to drive the lifting support 15.
B is lowered from the support rail 13B to the elevation rail 18 side, and the ladle 1 is mounted on the empty steel receiving cart 3 arranged on the floor surface 2 below the elevation rail 18. And this steel receiving cart 3
After moving, the steel receiving cart 3 equipped with the ladle 1 containing molten metal
Is moved to the floor surface 2 below the elevating rail 18 to insert the ladle 1 between the support yokes 17B, and the elevating winch 20B raises the elevating support body 15B to place the ladle 1 on the support yoke 17B. Mount the lifting support 15B to the lifting rail 1
8 to the support rail 13B. Then, the stopper device 23B is operated to position the elevating support base 15B at a predetermined position, and wait at the retracted position B.

When the load cell 16A detects that the amount of molten metal in the ladle 1 at the casting position A has decreased, the supply of molten metal is stopped, the long nozzle 1a is removed, and the swivel drive device 10 is driven to turn the swivel base. 12 is rotated 180 °, the elevating support 15B is stopped at the casting position A, the long nozzle 1a is attached to the ladle 1, and the supply of the molten metal to the tundish 6 is started. According to the above embodiment, the ladle 1 supplied with the molten metal from the steel mill is conveyed by the steel receiving cart 3 to the continuous casting facility in the rolling mill yard away from the steel mill, and the supporting rails 13A and 13B and the elevating rails. Support yokes 17A, 17 of the lift supports 15A, 15B lowered via 18
The ladle 1 can be easily delivered directly to B, and the ladle 1 can be easily delivered to the ladle changing device 4 even if there is no large overhead crane in the installation yard of the continuous casting facility.

[0020]

As described above, according to the ladle changing device of the continuous casting equipment of the present invention, even if there is no large overhead crane in the installation yard of the continuous casting equipment, the ladle transferred to the floor can be used. It can be easily delivered to the ladle changer. Therefore, since the ladle can be transported over a long distance on the floor surface by the ladle transporting means, the continuous casting equipment, which used to be in the yard of the steel mill, was moved to the yard of the rolling mill away from the steel mill. A line for directly rolling the cast slab in a high temperature state can be installed at low cost.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a continuous casting facility according to the present invention.

FIG. 2 is a plan view showing a ladle changing device of the continuous casting facility.

FIG. 3 is an enlarged side view of an essential part showing the same ladle changing device.

FIG. 4 is a side view showing a stopper device of the same ladle changing device.

[Explanation of symbols]

 1 ladle 2 floor surface 3 steel receiving trolley (ladle carrier) 4 ladle changing device 6 tundish 10 swivel drive device 11 support stand 12 swivel base 13A, 13B support rails 14A, 14B guide rollers 15A, 15B lift support 16A, 16B Load cell 17A, 17B Support yoke 18 Elevating rail 19A, 19B Elevating rope 20A, 20B Elevating winch (elevating drive device) 20a Drum 22A, 22B Movable sheave 23A, 23B Stopper device 23a Stopper cylinder 23b Receiving material

Claims (1)

[Claims] 1. A swivel that is rotatable about a vertical axis is provided on a support stand that is erected on the floor, and vertical support rails are provided at a plurality of outer peripheral portions of the swivel, respectively. Elevating supports provided with supporting yokes which are respectively arranged on the support rails so as to be movable up and down and capable of supporting a ladle, and swivel at a position where one lifting support is stopped at a casting position on a side portion of the support frame. An elevating rail in a vertical direction is provided which is arranged so as to be continuous with other supporting rails of the table so that the elevating support body can ascend and descend, and the ladle elevating drive device is capable of elevating the elevating support body along the supporting rail and the elevating rail. And a ladle exchange device in continuous casting equipment, wherein the ladle can be delivered between the elevating and lowering support body lowered on the elevating rail and the ladle conveying means on the floor surface.