JPH04236708A - Apparatus for repairing molten steel tapping hole in converter - Google Patents

Abstract

PURPOSE:To provide a supporting mechanism for connecting and centering a repairing apparatus for lining while expanding diameter and pressure-sticking a cylindrical repairing material inserted into a molten steel tapping hole in a converter with the converter body. CONSTITUTION:A frame is set in front of the molten steel tapping hole in the converter, and an advancing/retreating sliding table is arranged on this frame and the cylindrical repairing material is inserted into the molten steel tapping hole and set on this advancing/ retreating sliding table and a shifting/diameter-expanding repairing device for expanding the diameter and lining, is set as possible to tilt upward/downward while being pivoted and an engaging member is arranged in the front part of this shifting/diameter-expanding repairing device. At the time of aligning the engaging member of the above shifting/diameter- expanding repairing device with a center line of the molten steel tapping hole, a pin member engaged with this engaging member is fixed to the furnace body near the molten steel tapping hole and rear end part of the above frame is pivoted on one point on the extension of the axial line of the molten steel tapping hole in the converter in vertical state and also the tip part of this frame is hung and supporting with a driving device for adjusting tilting of the frame. An oscillation adjusting device is arranged to either the part in front or rear of the oscillation supporting point for the shifting/diameter--expanding repairing device mounted on the above frame. The repair of molten steel tapping hole during operation can be executed.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a support mechanism for connecting and centering a repair device for expanding and crimping a cylindrical repair material inserted into a tap hole in a converter and lining it with a converter body. It is something.

0002

BACKGROUND OF THE INVENTION Several proposals have been made in the past regarding repair methods for converter tap holes lined with refractories. For example, ``Method and device for repairing tap holes in converter furnaces'' (Japanese Unexamined Patent Publication No. 6
No. 1-110711) discloses a method in which a repair material is pushed outward in the radial direction using a roller diameter expanding device and is pressed against the inner surface of a tapping hole. However, since this method uses an annular core material, there is a drawback that the shape of the lining material cannot be maintained after crimping due to the buckling phenomenon of the annular core material after diameter expansion, and this phenomenon is difficult to repair. It becomes more noticeable as the thickness increases.

[0003] Furthermore, when a thermoplastic hardening material is used as the material for the repair material, the work can be carried out using the heat retained on the side of the repaired object, but the inside of the repair material, that is, the expanded diameter side of the roller, does not receive heat and the molded object collapses. do. Alternatively, the repair material will be decomposed into the outside and the inside, and the service life of the refractory repair material will be extremely reduced.

[0004] A two-layer structure consisting of a thermoplastic curable material and a room temperature curable material is also conceivable, but separation at the boundary would be a weak point.

[0005] In addition to the above construction methods, the press-in method
Various construction methods are known, such as the spraying method (Japanese Patent Application Laid-Open No. 60-24311), but all of them have unfavorable compactness after repair work, low wear resistance and erosion resistance,
Durability is poor.

The present applicant proposed Japanese Patent Application No. 1-199125, ``Method for Repairing Cylindrical Refractory Materials,'' as a construction method that surpasses the conventional construction method described above. The outline is that when repairing a cylindrical refractory material, a pre-designed cylindrical body of thermoplastic hardened material is inserted inside the cylindrical refractory material to be repaired, which has enough heat to soften the thermoplastic hardened material, and then pressure is applied. This is a method of repairing a cylindrical body by expanding its diameter by moving a diameter expanding jig.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a converter tap hole repair device used when the above-mentioned cylindrical refractory repair method is applied to the repair of a converter tap hole.

[0008] During converter operation, violent undulations of molten pig iron or slag in the furnace are generated due to oxygen blowing from a lance. Therefore, the main body of the converter constantly vibrates during operation. In addition, converters are equipped to be tiltable in order to smoothly carry out operations such as receiving pig iron, tapping steel, and discharging slag, and due to long-term use, mechanical play occurs in the tilting stop position.

[0009] When repairing a tapping hole during such a converter operation, the repair device is fixed to a fixed part of a building or the like, and is not allowed to move relative to the tapping hole where there is vibration or mechanical play. If they are combined, there is a problem that not only the tapping hole cannot be repaired in a straight manner, but also the repair equipment may be damaged.

SUMMARY OF THE INVENTION An object of the present invention is to provide a repair device equipped with a connecting and centering support mechanism that can reliably repair a tapping hole during operation of a converter.

[0011]

[Means for Solving the Problems] The present invention provides a structure in which a pedestal is disposed in front of a converter tapping hole, a back-and-forth sliding pedestal is provided on the pedestal, and
A cylindrical repair material is inserted into the tapping hole, and a movement/diameter expansion repair device that expands and inflates the diameter of the cylindrical repair material is installed on the back-and-forth sliding table so as to be able to move up and down.・An engaging member is provided in the front part of the diameter expansion repair device, and when the engaging member of the moving/diameter expansion repair device is aligned with the center line of the tapping hole, the pin member that engages with the engaging member is A gantry elevation adjustment drive device is fixedly installed in the furnace body near the tapping hole, pivotally supports the rear end of the gantry at a point on the axial extension of the tapping hole of the upright converter, and controls the tip of the gantry. This is a converter tapping hole repair device characterized by being suspended and supported by independent pedestal elevation adjustment drive devices at the tip and rear ends of the pedestal on which the movement/diameter expansion repair device is mounted. The converter tapping hole repair device described above is characterized in that a swing adjustment device is provided either in front or behind the swing fulcrum of the moving/diameter expansion repair device mounted on the pedestal. The above-mentioned converter tapping hole repair device is characterized in that:

0012

[Operation] The present invention engages and matches the tip of the moving/diameter expanding repair device with the tapping hole of the converter in operation, and the moving/diameter expanding repair device can be raised and raised relative to the frame. A shaft support was installed, and the rear end of the gantry was pivotally supported at a point on the axial extension of the tapping hole of the upright converter, and the tip was suspended and supported by the gantry elevation adjustment drive device. Therefore, centering can be easily carried out by arranging and adjusting the movement/diameter expansion repair device on the extension line of the tapping hole.

[0013] Also, since the front end and rear end of the pedestal are suspended by independent pedestal elevation adjustment drive devices, it is possible to place and adjust the moving/diameter expansion repair device on the extension line of the tapping hole in the same way as described above. can be easily implemented.

[0014] Furthermore, since the swing adjustment device is provided either in front or behind the swing fulcrum of the moving/diameter expansion repair device, the moving/diameter expansion repair device is arranged and adjusted on the extension line of the tapping hole. Centering can be controlled automatically and remotely.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory diagram of one embodiment of the present invention. A pedestal 2 is placed in front of the converter tapping hole 1. A sliding table 3 for forward and backward movement is provided on the pedestal 2. The back-and-forth sliding platform 3 moves back and forth on the pedestal 2 by the operation of a drive device 4 such as a cylinder. A cylindrical repair material used for repairing the tap hole of the converter in operation is inserted into the tap hole on the forward/backward sliding table 3, and is moved to expand the diameter and line the inside.・Diameter expansion repair device 5
is installed on a pivot 6 so that it can be lifted up and down.

The movement/diameter expansion repair device 5 includes a guide cylinder 7 for storing a plurality of cylindrical repair materials (not shown), a cylinder 8 disposed at the rear end of the guide cylinder 7, and a cylinder 8 disposed at the rear end of the guide cylinder 7. a pull-out rod (not shown) connected to the rod (not shown) and extended into the guide cylinder 7;
The above-mentioned cylindrical repair material is inserted into this pull-out rod and housed in the guide cylinder 7, and the tip of this pull-out rod has a plug (not shown) for expanding the diameter and lining the cylindrical repair material. ) is permanently installed. An engaging member 9 is provided at the front portion of the movement/diameter expansion repair device 5 configured as described above. On the other hand, a pin member 10 is fixed to the furnace body near the tapping hole 1 in a manner perpendicular to the center line of the tapping hole 1. Therefore, the engagement member 6 of the moving/diameter expansion repair device 5 is moved to the pin member 1.
0, the tip of the movement/diameter expansion repair device 5 is maintained in a state aligned with the center line of the tapping hole 1.

The rear end of the frame 2 on which the movement/diameter expansion repair device 5 is mounted is attached to a shaft support 12 on a structure 11 such as a building at a point on the extension of the axis of the tapping hole 1 of the converter in an upright state. do. Also,
The tip of the pedestal 2 is suspended and supported by a pedestal elevation adjustment drive device 13.

Therefore, when the gantry elevation adjustment drive device 13 is operated, the gantry 2 can be elevated up and down using the shaft 12 as a fulcrum, so the gantry elevation adjustment drive is performed so as to position the engaging member 9 on the axis of the tapping hole 1. After activating the device 13 to raise and lower the gantry 2, when the back and forth sliding table 3 is moved forward, the engaging member 9 engages with the pin member 10. In this engaged state, by operating the pedestal elevation adjustment drive device 13 to move the pedestal 2 up and down by a slight amount, the movement/diameter expansion repair device 5 is moved to the center line of the tapping hole 1 using the shaft 6 as a fulcrum. can be adjusted to match.

FIG. 2 is an explanatory diagram showing another embodiment of the present invention, in which the tip and rear ends of the pedestal 2 on which the moving/diameter expansion repair device 5 is mounted are controlled by an independent pedestal elevation adjustment drive device 13. It is a support structure suspended by. Therefore, by operating the independent pedestal elevation adjustment drive device 13 with the engaging member 9 engaged with the pin member 10 and moving the pedestal 2 up and down by a slight amount, the position can be adjusted more than in the case of FIG. With a high degree of freedom, the movement/diameter expansion repair device 5 can be adjusted to match the center line of the tapping hole 1 using the shaft 6 as a fulcrum.

As mentioned above, the back and forth sliding platform 3 on the pedestal 2
Since the movable/diameter expansion repair device 5 is arranged so as to be swingable at one point by the shaft 6, the moving/diameter expansion repair device 5 is engaged with the pin member 10 of the tapping hole 1, and the center of the tapping hole 1 and the movable/diameter expansion repair device 5 are connected to each other. After aligning the centers, adjust with the gantry elevation adjustment drive 13 and tap the tapping hole 1.
If the movement/diameter expansion repair device 5 is placed on the extension of the center line of the converter, the movement/diameter expansion repair device 5 will follow the vibrations of the converter using the shaft 6 as a fulcrum, so that the movement/diameter expansion repair device 5 will move and follow the vibrations of the converter. The repair of the tapping hole 1 can be carried out in an orderly manner.

[0021] In order to make it easier to set the elevation angle of the frame 2 on which the moving/diameter expansion repair device 5 is mounted, and to make it possible to make fine adjustments including the mechanical play of the converter or the repair device, As shown in FIG. 3, the fine-adjustment elevation and elevation of the repair device 5 can be adjusted to either the front or rear position of the shaft 6 that pivotally supports the moving/diameter expansion repair device 5 so as to be able to swing at one point. A device 14 is provided. This example shows an aspect where it is installed in the front. The fine adjustment elevation device 14 is connected to a drive device 17 that engages a vertically movable member 16 with shafts 15 provided on both left and right sides of the repair device 5, and drives the member 16 for vertical fine adjustment. It is configured as follows.

Therefore, according to the mechanism configured as described above, the pedestal is installed after being adjusted to a preset elevation angle by the elevation adjustment drive device 13, and the fine adjustment elevation device 14 is used to deal with displacements such as mechanical play. A setting method of centering by driving can be adopted.

[0023]

[Effects of the Invention] According to the present invention, it is possible to reliably connect, fix, and center the tapping hole with the movement/diameter expansion repair device for repairing the tapping hole in a converter in operation, thereby ensuring complete operation. Can be repaired. Furthermore, since repairs can be made quickly while the converter is in operation, production efficiency can be significantly improved compared to a method in which repairs are made while the converter is not in operation.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing another embodiment of the present invention.

FIG. 3 is an explanatory diagram showing another embodiment of the present invention.

[Explanation of symbols]

1: Converter tapping hole 2
: Frame 3: Forward and backward sliding platform
4: Drive device 5: Movement/diameter expansion repair device
6: Support shaft 7: Guide cylinder
8: Drive device 9: Engagement member
10: Pin member 11
:Structure 1
2: Support shaft 13: Frame elevation adjustment drive device 1
4: Fine adjustment elevation device 15: Axis
16: Vertically movable member 17: Drive device

Claims (3)

[Claims] Claim 1: A pedestal is placed in front of the converter tapping hole, a back-and-forth sliding slide is provided on the pedestal, and a cylindrical repair material is inserted into the tap hole on the back-and-forth sliding pedestal. The movement/diameter expansion repair device that expands and expands the diameter of this is pivoted and installed so that it can be lifted up and down.
An engaging member is provided in the front part of the moving/diameter expanding repair device, and a pin engages with the engaging member when the engaging member of the moving/diameter expanding repair device is aligned with the center line of the tapping hole. The member is fixed to the furnace body near the tapping hole, and the rear end of the pedestal is pivotally supported at a point on the extension of the axis of the tapping hole of the upright converter, and the tip of the pedestal is adjusted in elevation. A converter tapping hole repair device characterized by being suspended and supported by a drive device. 2. Converter tap hole repair according to claim 1, characterized in that the front end and rear end of the gantry on which the movement/diameter expansion repair device is mounted are each suspended by independent gantry elevation adjustment drive devices. Device. 3. The converter steel tapping according to claim 1 or 2, characterized in that a swing adjustment device is provided either in front or behind the swing fulcrum of the movement/diameter expansion repair device mounted on the frame. Hole repair device.