JPH06220520A - Device for changing vacuum degassing vessel - Google Patents

Abstract

PURPOSE:To continuously execute the vacuum degassing treatment of molten steel by constituting a line so that execution of a vacuum degassing treatment and a repair treatment can be separately executed. CONSTITUTION:The vacuum degassing treatment of the molten steel in a ladle 12 is executed at a treatment position 2 in a vacuum degassing vessel 10A provided with a truck. At the time of needing the maintenance, by turning a turn table 1 by 180 deg. angle, the vacuum degassing vessel is moved to a waiting position 3 and turned by 90 deg. angle with transfer rails 8 and a truck turning device 4 and reached a repair position 6 through truck running rails 9B to execute the repair. Then the vacuum degassing treatment is executed by using the vacuum degassing vessel 10B and the stand-by position 3 is free. The vacuum degassing vessel 10C provided with the truck is arranged at the stand-by position 3 through the rails 9A and the transfer rails 8. In such a way, each vacuum degassing vessel provided with the truck is successively and cyclically moved from the treatment position 2, stand-by position 3, repair position 5 or 6 stand-by position 3 to treatment position 2 to continuously execute the degassing treatment. In actuality, two repair positions and three vacuum degassing vessels each with a truck are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum degassing tank replacement apparatus used for degassing molten steel.

[0002]

2. Description of the Related Art There are two conventional double vacuum degassing devices.
A base vacuum degassing tank is installed, and each vacuum degassing tank is alternately replaced by a turntable or a tank trolley to perform degassing treatment of molten steel. (Japanese Patent Publication No. 57-454
59, JP-A-3-72016), that is, one of the two is used for degassing molten steel, and the other one is installed for standby and used for degassing several times. The prepared tank is replaced with the tank for standby, and the tank that was the tank for standby until then is used as the processing tank. And
The tank that became the standby tank will be repaired during the standby and will be ready for the next use. It is a normal operation to repeat this operation alternately.

Such an operation does not cause any particular problem as long as the repair of the other one is completed while the other one is being used for the degassing treatment, but before the repair of the other one is completed. It is a big problem when it is necessary to repair one unit in use, and in such a situation, it is inevitable to interrupt the degassing process and complete the repair of both units.

However, in recent years, not only the number of molten steels subjected to vacuum degassing treatment has increased, but also the number of types of steels subjected to vacuum degassing treatment for a long time has increased.
Often there is a danger of interruption of degassing.

[0005]

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a vacuum degassing tank replacement device for continuous processing without an interruption in the vacuum degassing process without anxiety.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a turntable having two or more notches on its periphery, a bogie turning device provided in contact with the turntable, and a bogie turning device provided in contact with the turntable. A vacuum degassing tank replacement device consisting of a laid bogie running track, a transfer track for moving the bogie between the bogie turning device and the turntable, and a vacuum degassing tank with three or more bogies It is a thing.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings.

FIG. 1 is a plan view of the apparatus of the present invention before installing a vacuum degassing tank with a carriage. The turntable 1 is provided with notches 2 and 3 of the same shape at symmetrical positions. Two
Corresponds to the vacuum degassing processing position, and 3 corresponds to the standby position of the vacuum degassing tank. On both sides of the notches 2 and 3, a transfer track 7 for laying a truck between the truck turning device 4 and the turntable 1 is laid. Turntable 1
A bogie turning device 4 is installed so as to face the notch portion 3, and a transfer track 8 is laid on an extension line of the transfer track 7 on the upper surface thereof. Tracks 9A and 9B for traveling the carriage are laid on the left and right of the carriage turning device 4 so as to be orthogonal to the transfer rail 8. Terminals 5 and 6 of the truck running tracks 9A and 9B respectively correspond to the repair position of the vacuum degassing tank.

FIG. 2 is a plan view of the apparatus of the present invention immediately before vacuum degassing is performed by installing three vacuum degassing tanks with a carriage.
FIG. 3 is a cross-sectional view taken along the line XX of the apparatus of the present invention immediately before performing vacuum degassing by installing three vacuum degassing tanks with a truck, and FIG. 4 is installing three vacuum degassing tanks with a truck. FIG. 7 is a cross-sectional view taken along line YY of the device of the present invention immediately before vacuum degassing is performed. Three vacuum degassing tanks 10A, 10B and 10C are mounted on carriages 14A, 14B and 14C, respectively, and are arranged at a processing position 2, a standby position 3 and a repair position 5.

Molten steel, which is an object to be processed, is put in a ladle 12, is placed on a dolly 11, and is moving below 10A.
(In the sectional view taken along the line YY, the dolly 11 and the ladle 12 are not included in the field of view, but they are shown in FIG. 4 for the sake of explanation.) Now, when focusing on the vacuum degassing tank 10A with a dolly and following its trajectory, first, It is placed in the processing position 2 and performs vacuum degassing processing. When repair is required, the turntable 1 turns 180 degrees and moves to the standby position 3 and is placed on the bogie turning device 4 by the transfer track 7 and the transfer track 8. The bogie turning device 4 turns 90 degrees, reaches the repair position 6 by the bogie running track 9B, and is repaired. At this time, the vacuum degassing process is performed using 10B, and the standby position 3 is empty. The vacuum degassing tank 10C with a trolley is arranged at the standby position 3 via the trolley traveling track 9A, the transfer track 8, and the transfer track 7. In this way
Each of the vacuum degassing tanks with a trolley moves in sequence in the order of processing position 2-standby position 3-repair position 5 or 6-standby position 3-processing position 2, and the degassing process is continuously performed.

In the figure, a vacuum degassing tank 3 with a carriage is shown.
We explained the case of two bases and repair positions, but if you have three or more cutouts on the turntable 1 or there are three or more repair positions and four or more vacuum degassing tanks with a trolley, you can afford more space. Vacuum degassing can be performed, but the repair position is 2 in terms of equipment cost, installation area, etc.
It is realistic to use three vacuum degassing tanks with trucks and carts.

[0012]

By using the apparatus of the present invention, the vacuum degassing process of molten steel can be stably and continuously performed without interruption.

[Brief description of drawings]

FIG. 1 is a plan view of an apparatus of the present invention before installing a vacuum degassing tank with a carriage.

FIG. 2 is a plan view of the apparatus of the present invention immediately before performing vacuum degassing by installing three vacuum degassing tanks with a carriage.

3 is a cross-sectional view taken along the line XX of FIG.

4 is a cross-sectional view taken along the line YY of FIG.

[Explanation of symbols] 1 ... turntable, 2 ... processing position, 3 ... standby position, 4 ... vacuum degassing tank swivel with trolley, 5 ... repair position, 6 ... repair position, 7 ... Transfer track, 8 ... Transfer track, 9A ... Vacuum degassing tank running track with trolley, 9B ...
Vacuum degassing tank running track with trolley 10A ... Vacuum degassing tank, 10B ... Vacuum degassing tank, 10C ... Vacuum degassing tank, 11 ... Ladle truck, 12 ... Ladle, 13 ... Nabe truck running track, 14A ... Vacuum degassing tank truck, 14B ...
Vacuum degassing tank cart, 14C ... Vacuum degassing tank cart, 15
A ... Exhaust pipe, 15B ... Exhaust pipe, 15C ... Exhaust pipe

Claims (1)

[Claims] 1. A turntable provided with two or more notches on its periphery, a bogie turning device provided in contact with the turntable, and a bogie running track laid in contact with the bogie turning device. , A vacuum degassing tank replacement device comprising a transfer track for moving the bogie between a bogie turning device and a turntable, and a vacuum degassing tank with three or more bogies