JP2734325B2 - Vacuum degassing tank replacement device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art As a conventional double vacuum degassing apparatus, there are two types.
A base vacuum degassing tank is installed, and degassing of molten steel is performed while alternately replacing each vacuum degassing tank with a turntable or a tank moving cart. (Japanese Patent Publication No. 57-454
No. 59, JP-A-3-72016) That is, one of the two units is used for degassing molten steel, and the other is installed for standby and used for degassing several times. The used tank is replaced with a standby tank, and the tank that has been the standby tank is used as a processing tank. And
The tank that became the standby tank completes repairs during standby and waits for the next use. It is a normal operation to repeat this operation alternately.

[0003] Such an operation does not cause any particular problem as long as the repair of one other unit is completed while one of the units is being used for degassing, but before the repair of the other unit is completed. If it becomes necessary to repair one of the units in use, it is a serious problem. In such a situation, it is necessary 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 the vacuum degassing treatment has increased, but also the type of steel subjected to the vacuum degassing treatment for a long time has increased, so that the frequency of repairs has increased.
Frequently, the degassing process may be interrupted.

[0005]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a vacuum degassing tank replacement apparatus for continuously performing a vacuum degassing process without interruption.

[0006]

According to the present invention, there is provided a turntable provided with two or more notches in a peripheral edge, a bogie turning device provided in contact with the turntable, and a bogie turning device in contact with the bogie turning device. The present invention relates to a trolley running track laid, a transfer trajectory for moving the trolley between the trolley turning device and the turntable, and a vacuum degassing tank replacement device including three or more trolley-mounted vacuum degassing tanks. Things.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail 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 cart. The turntable 1 is provided with notches 2 and 3 having the same shape at symmetric positions. 2
Denotes a vacuum degassing processing position, and 3 denotes a standby position of the vacuum degassing tank. On both sides of the notches 2 and 3, transfer tracks 7 for moving the bogie between the bogie turning device 4 and the turntable 1 are laid. Turntable 1
A bogie turning device 4 is installed so as to face the notch 3 of the vehicle, and a transfer track 8 is laid on an extension of the transfer track 7 on the upper surface thereof. Truck running tracks 9A and 9B are laid on the left and right sides of the truck turning device 4 in a shape orthogonal to the transfer track 8. The ends 5, 6 of the truck running tracks 9A, 9B correspond to the repair positions of the vacuum degassing tank, respectively.

FIG. 2 is a plan view of the apparatus of the present invention immediately before vacuum degassing is performed with three vacuum degassing tanks equipped with carts.
FIG. 3 is a cross-sectional view taken along the line XX of the apparatus of the present invention immediately before vacuum degassing with three trolleys installed, and FIG. 4 shows installation of three vacuum degasser with trolleys. FIG. 5 is a cross-sectional view of the device of the present invention taken along line YY immediately before performing vacuum degassing. Three vacuum degassing tanks 10A, 10B, and 10C are mounted on the carts 14A, 14B, and 14C, respectively, and are disposed at the processing position 2, the standby position 3, and the repair position 5.

The molten steel to be processed is placed in a ladle 12, placed on a trolley 11, and moving below 10A.
(The cart 11 and the ladle 12 are not in the field of view but are shown in FIG. 4 for the sake of explanation in the YY cross-sectional view.) Now, focusing on the vacuum degassing tank 10A with the cart, following its trajectory, It is arranged at the processing position 2 and performs vacuum degassing processing. When repair is required, the turntable 1 is turned by 180 degrees and moves to the standby position 3, and is mounted on the bogie turning device 4 by the transfer track 7 and the transfer track 8. The cart turning device 4 turns 90 degrees, reaches the repair position 6 by the truck traveling track 9B, and is repaired. At this time, the vacuum degassing process is performed using 10B, and the standby position 3 is empty. A vacuum degassing tank 10C with a trolley is arranged at the standby position 3 via the trajectory 9A, the transfer trajectory 8, and the transfer trajectory 7 for the trolley. In this way,
The vacuum degassing tanks with the carts sequentially move in order of the processing position 2-standby position 3-repair position 5 or 6-standby position 3-processing position 2 in order, and the degassing process is continuously performed.

In the figure, a vacuum degassing tank 3 with a trolley
Basically, the case of two repair positions has been described. However, if three or more notches are provided in the turntable 1 or the repair position is three or more and the number of vacuum degassing tanks with trolleys is four or more, there is more room. Vacuum degassing can be performed, but the number of repair locations is two in terms of equipment costs, installation area, etc.
It is realistic to use three vacuum degassing tanks with locations and carts.

[0012]

According to the present invention, the vacuum degassing of molten steel can be performed stably and continuously without interruption.

[Brief description of the drawings]

FIG. 1 is a plan view of the device of the present invention before a vacuum degassing tank with a trolley is installed.

FIG. 2 is a plan view of the apparatus of the present invention immediately before vacuum degassing is performed by installing three trolley-mounted vacuum degassing tanks.

FIG. 3 is a sectional view taken along line XX of FIG. 2;

FIG. 4 is a sectional view taken on line YY of FIG. 2;

[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 track for truck with trolley, 9B ・ ・
Trajectory of vacuum degassing tank with trolley, 10A vacuum degassing tank, 10B vacuum degassing tank, 10C vacuum degassing tank, 11 ladle truck, 12 ladle, 13 ladle Pot truck traveling track, 14A ... Vacuum degassing tank truck, 14B ...
Vacuum degassing tank trolley, 14C ... Vacuum degassing tank trolley, 15
A ... exhaust pipe, 15B ... exhaust pipe, 15C ... exhaust pipe

Claims (1)

(57) [Claims] 1. A turntable provided with two or more cutouts on its periphery, a bogie turning device provided in contact with the turntable, and a bogie traveling track laid in contact with the bogie turning device. , A transfer track for moving a bogie between a bogie turning device and a turntable, and a vacuum degassing tank exchanging device comprising at least three vacuum degassing tanks with bogies