JPS5953324B2 - Vacuum tank repair work method for molten steel degassing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for repairing a vacuum chamber (brick repair, nozzle repair, nozzle preheating, etc.) in molten steel degassing equipment, and improves the safety, labor saving, and speed of this repair work. It is possible to achieve this.

Currently, in molten steel degassing equipment, the nozzle part of a vacuum chamber is directly inserted into molten steel to degas the molten steel.

Repair work for the vacuum chamber was carried out as follows.

That is, the approximately 100-ton vacuum chamber was separated from its attached equipment, lifted up by a crane, and transferred to a trolley, the trolley was moved to the repair work site, and the vacuum chamber was firmly fixed to its pedestal by the crane. In addition to moving the trolley to the required location and storing it, the jigs necessary for repair work (for example, brick scrap collection packets, preheating hoods, work benches, etc.) are moved by crane to the bottom of the individual vacuum chamber, and then Repair work was carried out by appropriately positioning the jig using a forklift.

In such repair work, work such as positioning and handling of the repair jig, which is performed under the fixed vacuum tank, is complicated and requires a lot of manpower, making it difficult to save manpower and labor. It was not desirable from a safety point of view as it required the vehicle to be driven around the factory.

The present invention relates to a method for repairing a vacuum chamber in a molten steel degassing facility, which was made in view of the above circumstances, and its gist is to provide a trolley equipped with a lifting device for positioning the height of a repair jig. The vacuum chamber in the molten steel degassing equipment is separated from its attached equipment, placed on the lifting device and transported to the workplace, and then the vacuum chamber is temporarily placed on a fixed pedestal in the workplace by operating the lifting device as appropriate, Thereafter, the cart is moved, a repair jig is installed on its elevating device, and the cart is returned to the lower side of the fixed vacuum tank to perform repair work.

Embodiments of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a truck equipped with an elevating device 2 such as a hydraulic cylinder and a driving device 3, and the elevating device 2 and the driving device 3 can be operated appropriately by remote control.

Reference numeral 4 denotes a frame fixedly installed in the work place, and a hydraulic jack 5 is provided on the upper part of the frame, through which a vacuum tank 9 can be temporarily placed.

Furthermore, 6 is a preheating hood, 7 is a packet for collecting brick waste, and 8 is a preheating hood.
1 is a workbench, which is placed on the trolley 1 and aligned with the lifting device 2 during repair work.

When carrying out repair work, the vacuum chamber 9 is first separated from its attached equipment, and the vacuum chamber 9 is placed and supported by a crane or the like on the lifting device 2 of the trolley 1. In this state, the drive device 3 moves the trolley 1
to the fixed frame 4 in the work area.

Next, the elevating device 2 is operated as appropriate to temporarily place the vacuum tank 9 on the fixed pedestal 4 via the hydraulic jack 5.

Thereafter, the trolley 1 is moved to the required location on the mount 4, and jigs such as the preheating hood 6 necessary for repair work are placed and supported on the lifting device 2 using a crane or the like, and in this state, the trolley 1 is moved to the vacuum chamber 9.
Move to the bottom of.

During this movement, the elevating device 2 and the hydraulic jack 5 are adjusted so that the jig necessary for the repair work does not hit the lower side of the vacuum tank 9.

After the jigs such as the preheating hood 6 are set below the vacuum chamber 9 in this manner, the height positions of the various jigs are adjusted using the lifting device 2 to perform repair work.

Also, repair work is performed using a preheating burner or the like provided on the frame 4.

After the repair work is completed, the trolley 1 is moved from the bottom of the vacuum tank 9 to the required location, and the various jigs are moved using a crane or the like.

The cart 1 is moved in an empty state to be positioned below the vacuum tank 9, and the lifting device 2 and the hydraulic jack 5 are operated appropriately to support the vacuum tank 9 on the lifting device 2. Then, the trolley 1 is moved by its driving device 3, and the vacuum tank 9 is transported into the molten steel degassing equipment, and the vacuum tank 9 is set to perform the molten steel degassing work.

It should be noted that the present invention is not limited to the above-mentioned embodiments, for example, it is optional to use a forklift as a lifting device, and it goes without saying that various changes can be made without departing from the gist of the invention. .

As described above, according to the method for repairing a vacuum chamber in a molten steel degassing facility of the present invention, it is possible to efficiently perform repair operations on a vacuum chamber.

ii) The labor and time required for handling repair jigs and lifting equipment, which were conventionally required, can be eliminated, resulting in labor savings and time reduction.

iii There is no need to run forklifts etc. inside the factory, which is preferable from a safety standpoint.

Demonstrates excellent effects such as

[Brief explanation of drawings]

The drawing is an explanatory view showing a method for repairing a vacuum chamber in a molten steel degassing facility according to the present invention. 1... Trolley, 2... Lifting device, 4...
Open stand, 6... preheating hood, 7... packet for collecting bent brick waste, 8... workbench, 9... curved vacuum chamber.

Claims (1)

[Claims] 1 Using a trolley equipped with a lifting device to determine the height of the repair jig, separate the vacuum chamber in the molten steel degassing equipment from its attached equipment, place it on the lifting device and transport it to the work place, then turn the lifting device on. By operating the vacuum chamber as appropriate, the vacuum chamber is temporarily placed on a fixed stand in the workshop, and then the trolley is moved, a repair jig is installed on its elevating device, and it is returned to the bottom of the fixed vacuum chamber for repair work. A vacuum tank repair work method characterized by: