JPH0137814Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a removable cart for a tundish molten steel heating device, and particularly to a removable cart that allows the molten steel heating device to be safely and reliably attached to and removed from the tundish body.
Widely used in the continuous casting field.

[Conventional technology]

In continuous casting of steel (hereinafter referred to as casting), molten steel produced in a converter, etc. is stored in a ladle and transferred to a continuous casting tandy, where it is passed through a submerged nozzle, etc. that reaches the mold from the bottom of the tundish. Injected into mold. As described above, the temperature of molten steel inevitably decreases as it is transferred from the ladle to the tundish and then to the mold. However, since the casting temperature is extremely important in continuous casting, a tundish equipped with a molten steel heating device is used to heat the molten steel in the tundish if there is a risk that the molten steel in the tundish may drop below the planned casting temperature.

Usually, a low-frequency groove-type induction heating device is used as a molten steel heating device, but in a continuous casting tundish, the molten steel can only be cast for one or several ladles; It is necessary to replace the container.

On the other hand, the molten steel heating device has a flange 16 on the side of the tundish body 2, as shown in FIGS. 5A and 5B.
It consists of a molten steel heating device 4 which is integrated with the tundish main body 2 via A and 16B, and the molten steel heating device 4 communicates with the inside of the tundish main body 2 and includes a channel section 8 that accommodates molten steel 6, an iron core 1, and a heating coil. The channel part 8 consists of a refractory material 1 surrounding an iron core 10 and a heating coil 12.
4, and the molten steel 6 in the channel portion 8 is configured to be heated by the secondary coil of the heating coil 12.

The molten steel heating apparatus having the above-mentioned structure is called an ajax or wire furnace, and has been used for a long time as a holding furnace for heating casting pig iron.

Conventionally, the attachment/detachment work of these hot metal or molten steel heating devices to the furnace body or tundish body has been carried out while the equipment is being hoisted using a lifting tool 19 by a crane 18 for transporting heavy objects such as a ladle crane, as shown in FIG. flanges 16A, 16B in condition
This was done by attaching and detaching the bolts and nuts. This attachment/detachment work is infrequent, about once every six months in the case of a holding furnace for hot metal, but is frequently done twice a day in the case of a continuous casting tundish, which significantly impedes the use of the ladle crane 18. In addition, when attaching and detaching the lower bolts of the flanges 16A and 16B, the worker 20 must either go under the suspended load or go under the heated tundish body 2, making the work difficult. The work was extremely dangerous in terms of safety and safety.

[Problem that the invention attempts to solve]

An object of the present invention is to eliminate the drawbacks of the above-mentioned prior art in the work of attaching and detaching a molten steel heating device to and from a tundish body, and to provide an attaching and detaching device that enables safe and reliable attachment and detachment work with good workability.

[Means for solving problems]

The gist of the present invention is as follows.
That is, in the removable trolley used when attaching and detaching the molten steel heating device to and from the tundish body, there is a self-propellable traveling trolley, a lifting table placed on the traveling truck and movable up and down, and a lifting table placed on the lifting table and the lifting table placed on the lifting table. It is characterized by comprising a shift table movable in a direction perpendicular to the traveling direction of the truck, and a turning table placed on the shift table and rotatably placing the molten steel heating device during attachment and detachment. This is a removable trolley for a tundish molten steel heating device.

Embodiments of the present invention will be described with reference to FIGS. 1 to 4.
FIG. 1 is a schematic overall perspective view showing a removable trolley according to the present invention. As shown in FIG. 1, the removable cart according to the present invention has wheels 22 and is a self-propelled traveling cart 2.
4, an elevating table 26 placed on the traveling trolley 24 and movable up and down within a range of 100 mm, and a shift table 28 placed on the elevating table 26 and capable of moving laterally in a direction perpendicular to the traveling direction within a range of 100 mm.
and a turning table 30 which is placed on a shift table 28 and is provided so as to be able to turn on a horizontal plane within an angle range of 100 degrees, and is configured so that the molten steel heating device 4 is placed on the turning table 30. There is.

The traveling truck 24 includes a traveling truck frame 24A placed on the bearings of the wheels 22, and a truck frame 24A.
Consisting of a motor 24B installed above, the length is 7.1m/
It can run on its own at a running speed of min. Traveling trolley 24
The lifting table 26 placed on the handle 2
By operating the 6A, it is possible to raise and lower within a range of 100mm using a hydraulic pump and ram jack. Also, a shift table 28 provided on the lifting table 26
The shift table 28 is configured to move the shift table 28 by 100 mm by rotating the screw shaft using the manual handle 28A and moving a nut assembled into the shift table 28. Furthermore, a turning table 30 provided on the shift table 28 includes a roller 30 that rolls on the disc-shaped shift table 28 by an electric motor 30A.
B allows it to rotate through an angle of 100 degrees as shown in FIG.

[Effect]

When the used molten steel heating device 4 assembled integrally with the tundish body 2 on the turning table 30 is removed from the tundish body 2, and when the molten steel heating device 4 is separated and on standby in the tundish body 2 whose lining has been repaired. When installing the molten steel heating device 4, the molten steel heating device 4 is placed on the turning table 30, and the bolts and nuts connecting the flanges 16A and 16B are removed or attached, and the installation and removal work is performed. The outline of the operation for attaching the separated and standby molten steel heating device 4 to the repaired tundish main body 2 is as follows.

(a) Set the tundish main body 2 on the pedestal.

(b) Set the molten steel heating device 4 on the removable trolley according to the present invention.

(c) Push the travel button of the traveling cart 24 to bring the molten steel heating device 4 close to the set tundish main body 2.

(d) It has four functions of running, lifting, traversing, and rotating in order to position the pin hole provided on the flange 16B of the molten steel heating device 4 so as to face the positioning pin provided on the flange 16A of the tundish body 2. Operate the removable trolley.

(e) When the positioning is completed by (d), the traveling trolley 2
Press the run button 4 and move the tundish body 2.
Press the molten steel heating device 4 against the flange 16
After A and 16B come into close contact, the traveling trolley 24 is stopped.

(F) After the traveling trolley 24 stops, first the flange 16
Tighten the bolts and nuts on the sides and top of A and 16B.

(G) After lowering the elevating table 26 using the manual pump, press the travel button of the traveling cart 24 to release the removable cart.

(4) After tightening the lower bolts and nuts of the flanges 16A and 16B, the tundish main body 2 with the molten steel heating device 4 installed is placed on a tundish car with a crane for use in continuous casting, and the work is completed.

The above shows the tundish body 2 and the molten steel heating device 4.
Although the outline of the mounting operation procedure has been described, when separating the molten steel heating device 4 from the tundish main body 2 that requires repair, it can be safely and reliably separated by almost the reverse procedure of the above-mentioned operation.

[Effect of idea]

The removable trolley according to the present invention has a table having four functions of running, lifting, traversing, and rotating, and after placing the molten steel heating device 4 on the topmost revolving table 30, it is attached to and detached from the tundish body 2. With this configuration, we were able to achieve the following effects.

(b) Since it has become possible to eliminate the conventional attachment/detachment work by lifting the tundish body with the molten steel heating device, it has become possible to safely, reliably, and quickly attach and detach the tundish body and the molten steel heating device.

(b) Since it is no longer necessary to monopolize the crane for transporting heavy objects for a long period of time, the workability of the entire continuous casting operation can be improved without causing congestion for other operations.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view showing the outline of the configuration of the removable cart according to the present invention, Figs. 2 to 4 are a front view, plan view, and side view showing the structure of the present invention, and Figs. 5A and B are It is a partial sectional view showing a tundish with a molten steel heating device, A is a front view, B is a plan view,
FIG. 6 is a partial perspective view showing the conventional attachment/detachment operation between the tundish main body and the molten steel heating device. 2... Tandate body, 4... Heating chamber (molten steel heating device), 6... Molten steel, 8... Channel portion, 10...
Iron core, 12...Heating coil, 14...Refractory material, 16
A, 16B...Flange, 24...Traveling trolley, 26...
Elevating table, 28...shift table, 30...swivel table.

Claims (1)

[Scope of utility model registration request] The removable trolley used when attaching and detaching the molten steel heating device to and from the tundish body includes a self-propelled traveling trolley, a lifting table placed on the traveling truck and movable up and down, and a lift table placed on the lifting table that can be moved up and down. It is characterized by comprising a shift table movable in a direction perpendicular to the traveling direction, and a turning table placed on the shift table and rotatably placing the molten steel heating device at the time of attachment and detachment. A removable trolley for the tandate molten steel heating device.