JPH0735526B2 - Converter tap hole repair device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel tapping hole used when a cylindrical repair material is inserted into a converter tapping hole and then expanded and crimped by pulling out a diameter expansion jig to perform lining repair. The present invention relates to a positioning mechanism of a repair device.

[0002]

2. Description of the Related Art Several methods have been proposed in the past for repairing refractory-lined steel outlet holes in a converter. For example, Japanese Patent Application Laid-Open No. 61-110711 discloses a method in which a repair material is spread outward in the radial direction by a roller expanding device and pressed against the inner surface of a tapped hole. However, this method has a drawback that the shape of the lining material after pressure bonding cannot be maintained due to the buckling phenomenon of the annular core material after the diameter expansion because the annular core material is used. The greater the thickness, the more noticeable.

When a thermoplastic hardening material is used as the material for the repairing material, the heat can be applied with the heat retained on the repaired object side, but the inside of the repaired material, that is, the roller expansion side does not receive heat, and the compact collapses. To do. Alternatively, the repair material is decomposed into the outside and the inside, and the durability of the refractory repair material is extremely reduced.

Further, a two-layer structure of a thermoplastic curable material and a room temperature curable material may be considered, but it becomes a weak point when the boundary portion is separated.

In addition to the above construction method, Japanese Examined Patent Publication No. 61-8124
There are various known construction methods such as the press-fitting method of JP-A No. 60-24311 and the spraying method of JP-A No. 60-24311, but all of them are not preferable in denseness after repairing and have low wear resistance and melt damage resistance. , The service life is inferior.

[0006] The applicant of the present invention has proposed a method for repairing a cylindrical refractory material, Japanese Patent Application No. 01-199125, as a construction method that surpasses the above-mentioned conventional construction methods. The outline is, when repairing a cylindrical refractory material, insert a pre-designed cylinder of thermoplastic hardening material into the inside of the cylindrical refractory material to be repaired that has sufficient heat to soften the thermoplastic hardening material, and further apply pressure. This is a method of expanding and repairing the cylindrical body by moving the expanding jig.

[0007]

DISCLOSURE OF THE INVENTION The present invention is directed to a steel hole for expanding a cylindrical repair material used for applying the above-mentioned method for repairing a cylindrical refractory material to a steel exit hole of a converter and lining it by crimping. The present invention relates to a positioning mechanism of a repair device.

In the converter operation, the furnace body during the oxygen blowing operation is in a substantially vertical state, but the stopping accuracy thereof is generally within the range of ± 1 to 2 °. This is because it is difficult to stop the converter vertically because the tilting and rotating operation of the converter is performed manually by the operator. Further, since the converter and its tilting / rotating device are large-sized heavy objects, the mechanical backlash corresponding thereto is inherent.

When repairing the tap hole during operation of the converter,
When inserting a cylindrical repair material into the tap hole and moving the diameter expansion jig to expand and crimp it for lining, first, in order to connect the tap hole repair device with the tap hole, tap the tap hole. It is necessary to align the center axis of the hole with the center of the repair device. If this is not the case, insertion of a cylindrical repair material into the tapped hole will be a problem, and the expansion and lining of the expansion jig due to movement will cause eccentricity. The device body may be damaged.

[0010]

SUMMARY OF THE INVENTION The gist of the present invention is a tap hole repairing device for inserting a cylindrical repair material into a tap hole and then expanding and lining the tap hole. One end of the shaft is rotatably supported by the building structure, and the other end of the converter is suspended and supported by a drive adjustment device. Furthermore, the uprightness of the converter is measured during blowing. An apparatus and a taphole repairing device for a converter, comprising: an arithmetic control device for arithmetically outputting a drive amount of the drive adjusting device from a measurement value of the uprightness measuring device. After the cylindrical repair is inserted into the inside, it is a tapped hole repairing device for expanding and lining, and the front end and the rear end of the tapped hole repairing device are each suspended and supported by a drive adjusting device, and further, An uprightness measuring device for measuring the upright state of the converter during blowing, and the drive adjusting device based on the measured value of the uprightness measuring device. In converter tapping hole repair apparatus being characterized in that an arithmetic control unit for calculating outputting a driving amount of.

[0011]

According to the present invention, the upright state of the converter in which the upright position is slightly displaced during each operation is measured, and based on the measured value, the center of the tap hole repairing device arranged in front of the tap hole of the converter is measured. Calculates the drive amount for moving and arranging on the extension of the center axis of the tapped hole, and drives and controls the drive adjustment device, so positioning is ensured
Automatic operation is possible.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of a tapped hole repairing device for a converter used in the present invention. A pedestal 2 is arranged in front of the converter tap hole 1. A forward-backward sliding base 3 is provided on the base 2. The forward / backward slide base 3 moves forward / backward on the base 2 by the operation of a drive device 4 such as a cylinder. A cylindrical repair material used for repairing the tapped steel hole 1 of the operating converter is inserted and arranged on the forward / backward sliding base 3 inside the tapped steel hole, and the diameter is expanded / lined. The moving / expanding repair device 5 is installed so that it can be lifted up and down with a shaft support 6.

The moving / expanding repair device 5 includes a guide cylinder 7 for accommodating a plurality of cylindrical repair materials (not shown), a cylinder 8 arranged at the rear end of the guide cylinder 7, and the cylinder 8. Rod (not shown) connected to the rod (not shown) and extended into the guide cylinder 7 (not shown),
The above-mentioned cylindrical repair material is inserted into this pull-out rod and is housed in the guide cylinder 7. The tip of this pull-out rod has a plug (not shown) for expanding and lining the cylindrical repair material. No) is fixed. An engaging member 9 is provided in the front part of the moving / diameter expanding repair device 5 configured as described above. On the other hand, the pin member 10 is fixed to the furnace body in the vicinity of the tap hole 1 so as to be orthogonal to the center line of the tap hole 1. Therefore, when the engaging member 6 of the moving / diameter expanding repair device 5 is engaged with the pin member 8, the tip of the moving / diameter expanding repair device 5 is maintained in a state of being aligned with the center line of the tapped hole 1.

The rear end of the gantry 2 on which the moving / expanding repair device 5 is mounted is a point on the axis line extension of the tapping hole 1 of the converter in an upright state, and is supported on a structure 11 such as a building by a shaft support 12. To do. Also,
The tip of the gantry 2 is suspended and supported by the drive adjusting device 13.

Therefore, when the drive adjusting device 13 is operated,
Since the gantry 2 can be lifted up and down with the shaft 12 as a fulcrum, the drive adjustment device 13 is operated so as to position the engaging member 9 on the axis of the tapped hole 1, and the gantry 2 is lifted up and down. When the moving base 3 is moved forward, the engagement member 9 engages with the pin member 10. In this engaged state, the drive adjusting device 13 is operated to move the gantry 2 up and down by a slight amount, so that the moving / diameter expanding repair device 5 is aligned with the center line of the tapped hole 1 with the shaft 6 as a fulcrum. It can be adjusted to the desired state.

As a support mechanism of the tap hole repairing apparatus in the apparatus of the above embodiment, instead of the mode in which the structure 11 such as the building is pivotally supported 12, as shown in FIG. Similarly to the parts, a support structure suspended by independent drive adjusting devices 13 can be adopted. According to this support structure, by operating the independent drive adjusting device 13 in the state where the engaging member 9 is engaged with the pin member 10 to move the pedestal 2 up and down a little, the case of FIG. In a state where the degree of freedom in position adjustment is higher, the movement / diameter expansion repair device 5 can be adjusted to match the center line of the tapped hole 1 with the shaft 6 as a fulcrum.

As is well known, the converter during blowing is almost upright, and when the blowing is completed, the converter tilts to tap steel or slag. The present invention is for automatically aligning the steel exit hole of the converter in a substantially upright state during the blowing and the steel hole repair device arranged in front of it, and the upright degree is set in the vicinity of the converter. Install measuring equipment. As a device for measuring the uprightness of the converter, a method is used in which a plurality of specific points of the converter are set and the uprightness is obtained from the displacement of the specific points at the time of honest standing, which is obtained in advance, or a tilting rotary support shaft (trunnion A method in which a tilt angle sensor is directly attached to the shaft and the uprightness of the stop position is obtained from the rotation angle can be adopted.

FIG. 2 shows an example of a system in which an encoder 15 as a tilt angle sensor is directly attached to a tilt rotation support shaft (trunnion shaft) 14 of a converter and the uprightness of a stop position is obtained from the obtained rotation angle. The data of the angle sensor 15 is passed through the converter 16 and the operation unit 17 calculates the operation amount. This example shows two independent drive control devices 1
3 shows a mode in which the controller 3 is operated, and the first system operates the controller 18, the servo amplifier 19, and the servo valve 20 to operate the drive adjustment device 13 on the converter side, for example. The movement amount of the drive adjusting device 13 is detected by the position sensor 21 and fed back to the controller 18. The second system has a controller 18 and a servo amplifier 1 as in the first system.
9. Operate the servo valve 20 to operate the drive adjusting device 13 on the reversing furnace side, for example.

As described above, the drive adjusting device 13 for moving and arranging the tapped hole repairing device on the extension of the central axis of the tapped tapped hole of the converter.
As for, as long as it has a function of generating a displacement necessary for operating the repair device two-dimensionally, for example, a device that gives a linear displacement of a hydraulic cylinder, a motor cylinder, etc., a hydraulic rotary actuator, a servo Motors can be selected and used based on the equipment layout.

As described above, when the upright state of the converter during blowing is measured and the tapped hole repairing device 13 is moved and arranged based on the measurement result and centered with the tapped hole 1, the tapped hole repair is performed. Since the moving / expanding repair device 5 of the device is swingably arranged at one point by the shaft 6, when the driving device 4 is actuated to move the moving / expanding repair device 5 forward, the engaging member 9 becomes a pin member. The center of the tapped hole 3 is engaged with 10, and the sensor of the moving / diameter expanding repair device 5 is aligned. Although the converter vibrates subtly during repair of the tapped hole during the operation of the converter, the moving / diameter expanding repair device 5 follows the swinging movement with the shaft 6 as a fulcrum, so that the tapped hole 1 can be moved during the converter operation. Repair work can be done in an orderly manner.

[0021]

[Effect] According to the present invention, the tap hole repair device and the tap hole can be automatically connected and fixed and centering can be automatically performed on the converter during operation, so that the converter can be quickly repaired during the converter operation. Therefore, it is possible to significantly improve the production efficiency as compared with the method of repairing during non-operation.

[Brief description of drawings]

FIG. 1 is an explanatory view of a tapped hole repairing device of a converter used in the present invention.

FIG. 2 is an explanatory block diagram of a system for moving and arranging a tapped hole repairing device according to an upright state of a converter.

FIG. 3 is an explanatory view of another embodiment of the tapped hole repairing device of the converter used in the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Steel tapped hole 2 ... Stand 3 ... Forward / backward sliding stand 4 ... Drive device 5 ... Moving / expanding repair device 6 ... Support shaft 7 ... Guide cylinder 8 ... Cylinder 9 ... Engagement member 10 ... Pin member 11 ... Structures such as buildings 12 ... Support shaft 13 ... Frame / elevation adjustment drive device 14 ... Converter trunnion shaft 15 ... Tilt angle sensor 16 ... Transducer 17 ... Calculator 18 ... Controller 19 ... Servo amplifier 20 ... Servo valve 21 ... Position sensor

Claims (2)

[Claims] 1. After inserting a cylindrical repair material into the tapped hole,
A tap hole repair device for expanding and lining, one end of the tap hole repair device being rotatably supported by the building structure, and the other end of the converter being hung and supported by a drive adjusting device. And further comprises an uprightness measuring device for measuring the upright state of the converter during blowing, and an arithmetic control device for arithmetically outputting the drive amount of the drive adjusting device from the measured value of the uprightness measuring device. A converter steel tap hole repair device characterized in that 2. A tapped hole repairing device for expanding and lining the inserted tapped hole after inserting a cylindrical repair into the tapped hole, wherein a front end and a rear end of the tapped hole repairing device are drive adjusting devices, respectively. An uprightness measuring device that is suspended and supported and that measures the upright state of the converter during blowing, and an arithmetic control device that arithmetically outputs the drive amount of the drive adjusting device from the measured value of the uprightness measuring device. A converter tap hole repairing device characterized by comprising: