JPH05146849A - Billet continuous casting equipment having plural strands - Google Patents

Abstract

PURPOSE:To safely and quickly change a mold without needing more establishment of a spare strand by shifting the mold developing an accident to an escaping space together with an oscillating device and changing the mold on the working floor. CONSTITUTION:When casting into one strand in the molds 7 becomes impossible, the pouring of molten metal into this mold is stopped and also a floor material of the front part working floor 1a corresponding to this mold 7 is taken away and released. By driving a driving winch 23 in a mold shifting device 22, the oscillating device 9 is shifted to the front part from the casting position together with the mold 7 and a unit case 16 is shifted to the escaping space part 21b from the casting position space part 21a to expose the mold at the releasing part in the front part working floor 1a. After the mold is taken out by a crane in the equipment, the new mold 7 is fitted to an oscillating table 11 and by again reversely driving the driving winch 23, the mold and the oscillating device 9 is returned back to the casting position, and after the front part working floor 1a is closed, the casting into this mold is reopened. By this method, the changing work of the mold is facilitated and the continuous casting for long time can be operated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a billet continuous casting facility having a plurality of strands, which has a function of rapidly changing the molds of the strands.

[0002]

2. Description of the Related Art Conventionally, in a billet continuous casting facility having a plurality of strands, when one of the molds of a plurality of strands is replaced due to an accident such as breakout or overflow during continuous casting, the molds separated by each mold There is a method in which a worker enters the cooling room directly below and replaces the copper tube of the mold from below, but this involves danger of replacement work and it is necessary to expand the strand interval more than necessary to secure a working space There is. In addition, since open billet continuous casting equipment cannot control the flow rate,
It is difficult to increase or decrease the casting speed, so if an accident occurs, casting will continue with other normal strands, but it will not be able to cover the reduced production, and the timing of the molten metal supply will be different from the normal time, making it extremely difficult to operate. there were.

In order to solve these problems, it is now practiced to provide a spare strand mold. That is, the required number of strands N can be calculated from the capacity of the ladle, tap time of tapping, billet size, and proper casting speed, but the number of strands is set to N + 1 in consideration of the stop rate due to an accident. ..

[0004]

However, in the above continuous casting equipment, there is a problem in that it is costly to add extra strands, and it is not possible to deal with the replacement of molds having a number (plurality) or more of extra strands. there were.

The present invention solves the above problems, reduces the cost by eliminating the need for additional spare strands, and enables safe and quick mold replacement, and enables continuous casting operation for a long time. An object of the present invention is to provide a billet continuous casting facility having

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention supplies molten metal to a plurality of molds arranged on a working floor to continuously form a plurality of billets along a lower casting line. In the continuous billet casting equipment for pulling out, a vibration device for vibrating the mold for each mold is arranged in the accommodation space below the work floor orthogonal to the mold arrangement direction, and these vibration device and the mold are each horizontally orthogonal to the mold arrangement direction. And a retractable space part in which the vibrating device and the mold are movable on the vibrating device side of the accommodation space, and the vibrating device and the mold are moved between the casting position and the retracting space part position. The movable floor is provided so that the work floor in the accommodation space can be opened and closed.

[0007]

According to the above construction, when an accident occurs in one strand, the working floor corresponding to the mold is opened and the moving device is driven to move the mold together with the vibration device from the casting position to the retracted space position. After performing the mold replacement work from the work floor, the mold and the vibration device are returned to the casting position again, whereby the casting can be restarted quickly. Therefore, it is not necessary to add a mold for the spare strand, the cost is low, and even if an accident occurs in another strand, the mold can be replaced by the same replacement work, and the continuous casting operation can be performed for a long time.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the billet continuous casting equipment according to the present invention will be described below with reference to the drawings. A ladle 3 is supported by a ladle stand 2 which is erected above the work floor 1. The ladle 3 is freely movable below the ladle 3 via a pair of guide rails 4 laid on the work floor 1 with the casting position sandwiched therebetween. The tundish car 5 is arranged, and the tundish 6 mounted on the tundish car 5 is located. Below the tundish 6, six molds 7 are arranged in a row along the tundish car moving direction, and a casting path 8 for a strand that bends downward and forward from each of these molds 7 is formed. A cooling device and a straightening pulling device (not shown) are arranged along the above. Reference numeral 10 denotes an overflow pot arranged on the rear working floor 1b at the rear of the mold 7.

Each of the molds 7 is supported by a vibrating table 11 of a vibrating device 9 arranged under the front (operator side) work floor 1a orthogonal to the mold arrangement direction. The vibrators 9 forming a pair and carrying the mold 7 are moved from the casting position to the front work floor 1a side so that the mold 7 can be replaced.

That is, the vibrating device 9 composed of the vibrating machine 13 driven by the motor 12 and the vibrating table 11 connected to the vibrating machine 13 via the guide rod 14 and the transmission shaft 15 is used. The other parts are housed in a rectangular box-shaped unit case 15, and these unit cases 16 are respectively arranged in a housing space 21 formed under the front work floor 1a. The upper surface of the unit case 16 on the mold 7 side is set to be flush with the front work floor 1a, and the traveling wheels 5 of the tundish car 5 are set.
A guide rail 4a for guiding a is laid, and the guide rail 4a is divided for each unit case 16. The accommodating space 21 includes a casting position space portion 21a for accommodating the vibration device 9 at the casting position and the casting position space portion 21.
The unit case 16 is composed of a retractable space portion 21b in which the unit case 16 can move further forward than a, and the unit case 16 holding the mold 7 on the vibration table 11 is a mold moving device 22.
Thus, it is possible to reciprocate between the casting position space portion 21a and the retreat space portion 21b.

The mold moving device 22 is connected, for example, to a front part of the unit case 16 via a drive winch 23 arranged on the front work floor 1a and one end of a drum 23a of the drive winch 23 via a sheave 24. Each unit case 16 is provided with an outward traction cord 25 and a return traction cord 27 connected to the rear of the unit case 16 from the drum 23a through a sheave 26.
The drive mechanism of the mold moving device may use a cylinder device or a rack and pinion mechanism.

The front work floor 1a is composed of a floor material in which a plurality of refractory bricks are fitted in a frame of a predetermined size, and the plurality of floor materials are removably arranged on the floor support beam. By individually removing the floor material at the predetermined positions, the upper side of the intended accommodation space 21 can be opened, and the movement of the unit case 15 is not hindered.

Next, the operation of the billet continuous casting equipment having the above construction will be described. Ladle 3 to Tundish 6
The molten metal supplied to the mold is injected into each mold 7 through the nozzle 6a, and the billet is pulled out from the mold 7 along the casting path 8 to perform continuous casting.

At this time, when a breakout occurs in one of the molds 7 and casting becomes impossible, the pouring of the mold is stopped and the front working floor 1a corresponding to the mold 7 is stopped. Remove and open the flooring. Then, the drive winch 23 of the mold moving device 22 is activated to move the vibrating device 9 together with the mold 7 forward from the casting position to move the unit case 16 from the casting position space 21a to the retract space 21b. Is exposed at the open part of the front work floor 1a. At this time, the split guide rails 4a also move, but the traveling wheels 5a of the tundish car 5 are connected to the unit case 16
Since it is located on the outer guide rail 4, the movement of the unit case 16 is not hindered. Then, after the mold 7 is taken out by the in-equipment crane (not shown), the new mold 7 is mounted on the vibrating table 11, the drive winch 23 is again activated and reversed, and the mold 7 and the vibration device 9 are returned to the casting position. After closing the front work floor 1a, casting by the mold 7 is restarted.

As in the above embodiment, the tundish car 4
In the case where the guide rail 4 is on the work floor 1, the guide rail 4a is divided and provided on the unit case 16,
This does not apply to, for example, those which are not laid on the work floor 1 as disclosed in Japanese Utility Model Publication No. 60-23086.

[0016]

As described above, according to the billet continuous casting equipment according to the present invention, when an accident occurs in one strand, the working floor corresponding to the mold is opened and the moving device is driven to drive the mold. Is moved from the casting position to the retreat space position together with the vibration device, the mold is replaced from the work floor, and then the mold and the vibration device are returned to the casting position again, whereby the casting can be restarted quickly. Therefore, it is not necessary to add a mold for the spare strand, the manufacturing can be performed at low cost, and since the replacement work is performed from the work floor, the mold arrangement interval may be small. In addition, it seems that there is no reduction in production or the timing difference of the pouring operation, which occurs when the casting of the mold in which the accident occurred is stopped, and the operation seems good. Furthermore, even if an accident occurs in another strand or repair is required, the same mold replacement work can be performed, and long-time continuous casting operation can be performed.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a billet continuous casting facility according to the present invention.

FIG. 2 is a cross-sectional view showing the same billet continuous casting equipment.

FIG. 3 is a plan view showing the same billet continuous casting equipment.

[Explanation of symbols]

 1 work floor 1a front work floor 3 ladle 5 tundish car 6 tundish 7 mold 8 casting path 9 vibrating device 11 vibrating table 16 unit case 21 accommodation space 21a casting position space 21b evacuation space 22 mold moving device 23 drive winch

Claims (1)

[Claims] 1. In a billet continuous casting facility for supplying molten metal to a plurality of molds arranged on a work floor to continuously pull out a plurality of billets along a lower casting line, vibration for vibrating the molds for each mold The devices are respectively arranged in the accommodation spaces below the work floor orthogonal to the mold array direction, and the vibration device and the mold are configured to be movable in the horizontal direction orthogonal to the mold array direction, and the vibration device side of the accommodation space. To form a retreat space part in which the vibrating device and the mold can move, and to provide a moving means for moving the vibrating device and the mold between the casting position and the retreat space part position to open and close the work floor in the accommodation space. A billet continuous casting facility having a plurality of strands, which is configured to be possible.