JPS622606B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sleeve brick replacement device that can easily remove and install sleeve bricks from a nozzle portion of a molten metal container such as a converter.

In general, the refractories on the inner walls of molten metal containers, especially converters for steelmaking, are severely damaged, especially the tap nozzles and nozzles for blowing oxygen and other gases. Local repairs are being carried out to replace the parts. However, the repair time required to replace the sleeve brick directly causes a reduction in furnace operation rate and productivity. In addition, when replacing the sleeve bricks, conventionally the sleeve bricks in a high temperature state are manually crushed and removed using a breaker after tapping, but this is a hot spot and requires high accuracy in installing the sleeve bricks. Therefore, a great deal of labor was required, and the removal and installation work took a long time. Furthermore, since the sleeve bricks were large and heavy, it was difficult to install them manually.

Until now, as a method for shortening the time required for replacing sleeve bricks, a patent application filed by the applicant in 1982-
No. 96030 and Japanese Patent Application No. 57-39565 disclose a method of cutting and removing the sleeve brick as a cylindrical core, but these methods only relate to the sleeve brick removal operation in the sleeve brick replacement operation. In view of the above-mentioned points, the present inventors have provided an apparatus that can perform a series of operations extremely quickly and accurately, from positioning the cutting tool prior to the removal operation to mounting a new sleeve after the removal operation. The straight line connecting the center point on the outside of the sleeve brick hole and the center point on the inside of the furnace is called the center point, but since the tilting position of the converter and the installation position of the exchange device differ each time before removing the sleeve brick, the center point of the sleeve brick hole is called the center point of the sleeve brick hole. It is necessary to match the direction of entry of the cutting tool. If the exchanger is installed so that the blade of the exchanger is placed near the sleeve brick hole of the converter, which is tilted at an angle that facilitates sleeve replacement work, connect the center point of the tip of the blade and the center point of the sleeve brick hole on the outside of the furnace. The deviation between the direction of the straight line and the cutting tool advancing direction can be expressed in two deviance angles, horizontal and vertical, in three-dimensional space. These argument angles are called eigenvalues. Next, even if the advancing direction of the cutting tool passes through the center point of the sleeve brick hole on the outside of the furnace, the center of the sleeve brick hole and the advancing direction of the cutting tool do not necessarily match. The deviation between the straight line connecting the center point inside the furnace and the center point outside the furnace of the sleeve brick hole, that is, the center point, and the cutting tool advancing direction can also be expressed by two deviation angles in the horizontal and vertical directions in three-dimensional space, but these deviation angles are also called eigenvalues. Therefore, in order to match the advancing direction of the cutting tool with the core of the sleeve brick hole, it is necessary to have the ability to adjust these four characteristic values. If even one of these four characteristic values does not match, the cutting tool will damage parts other than the sleeve brick, significantly reducing the durability of the furnace and causing an accident of molten metal spilling out. In order to match the cutting tool entry direction with the sleeve brick hole alignment, the cutting tool must not only have a function that can adjust the four unique values mentioned above, but also has a function that can recognize the match between the sleeve brick hole alignment and the cutting tool entry direction. is necessary. If the recognition function does not exist, these four unique values must be set by repeating trial and error while inserting a cutting tool into the sleeve brick hole and crushing the sleeve brick. These methods require longer working hours and damage to areas other than the sleeve bricks. After the sleeve bricks are removed, new sleeve bricks are installed, but it takes a considerable amount of time to transport the sleeve bricks and prepare the jigs for installation. Furthermore, during installation work, it is necessary to have a function to adjust the four eigenvalues in space and a function to recognize the matching situation between the sleeve hole alignment and the direction in which the sleeve enters. If these functions are lacking, you will have no choice but to install it through trial and error. Furthermore, if an adhesive or the like is applied to the outer surface of the new sleeve brick, the adhesive or the like will peel off, resulting in incomplete installation work or prolonging the work time. In order to perform the above-mentioned sleeve brick removal and installation work in a short time and with high precision, it is necessary to have a function that allows easy adjustment of the spatial alignment between the center of the sleeve brick hole and the cutting tool entry direction, and a jig for transporting and installing the new sleeve. It is required that the device be equipped with a function that allows quick installation, etc., and a function that minimizes the number of spatial alignments.

In view of the above points, it is an object of the present invention to provide a sleeve brick exchanging device for a molten metal container, which has extremely high practical value and is capable of quickly and accurately removing and installing sleeve bricks. To do this, a traversing pedestal that can freely traverse in a direction perpendicular to the traveling direction of the pedestal and a turning table that can rotate above the pedestal are mounted on a truck having an endless track.
A tilting frame is provided above the table, and tilting cylinders are attached to the front and rear ends of the frame via tilting pins.The upper end of the cylinder rod is connected to the lower part of the boom connecting rod. A cutting tool boom and a sleeve boom are installed parallel to each other in a direction perpendicular to the rod, and the cutting tool boom and sleeve boom can be moved vertically and tilted together on the boom connecting rod by the cylinder, and a sleeve brick is attached to the cutting tool boom. A cylinder for moving the cutting tool to be dismantled back and forth and a drifter unit for rotating or impacting the cutting tool or both are provided, and the cutting tool boom has a sleeve brick hole for matching the advancing direction of the cutting tool with the center of the sleeve brick. The sleeve boom is equipped with a sighting device, and the sleeve boom is provided with a cylinder that moves back and forth a sleeve insertion frame with a sleeve support for holding a replacement sleeve brick attached to the tip, so that the cutter and sleeve support can be moved anywhere in three-dimensional space. A sleeve brick dismantling and replacement device for a molten metal container is characterized in that it is movable in the direction of the sleeve.

The present invention will be explained in detail below based on embodiments shown in the drawings. FIG. 1 is a side view showing an example of the present invention;
FIG. 2 is a plan view. As shown in the figure, for example, a bogie 1 with an endless track has a traversing frame 2 that can freely traverse in a direction perpendicular to the direction in which the bogie enters, and has four slide bearings 3, 4, 5, 6, two slide shafts 7, 8
It is attached via. The slide shafts 7 and 8 are fitted into slide bearings 3, 4 and 5, 6. The traversing frame 2 is connected to the slide shafts 7 and 8 by fitting, and the operation of the traversing cylinder 9 enables all devices loaded on the pedestal to traverse. A turning table 10 is attached above the traversing frame 2, and all devices loaded on the table can be turned by the operation of a turning motor 11. A tilting frame 12 is attached above the turning table 10, and tilting pins 13, 14
The tilting cylinders 15 and 16 are connected via the upper end of the tilting cylinder 15 and the boom connecting rod 17, respectively. There is. This allows all devices attached to the boom connecting rod to tilt the boom by actuating either one of the tilting cylinders 15, 16, and to raise and lower the boom by actuating both. The cutting tool boom 19 and the sleeve boom 20 are arranged parallel to each other, maintained at a constant distance, and perpendicular to the connecting rods 17, 18, and are connected by fitting. A sleeve hole sight 23 is attached to the cutting tool boom 19 and can confirm that the advancing direction of the cutting tool 21 and the sleeve brick hole alignment 22 match.
A cutter boom cylinder 25 is provided in the cutter boom 19 for moving a drifter frame 24, which is inscribed in the boom and slidably attached thereto, to move back and forth in the same direction as the cutter boom 19. A drifter unit is provided within the drifter frame 24 to drive the cutting tool either by impact or rotation, or both. Further, a sleeve boom cylinder 29 is provided in the sleeve boom 20 to move a sleeve insertion frame 28 which is inscribed in the boom and slidably attached thereto and moved back and forth in the same direction as the sleeve boom 20. A sleeve support 30 is attached. Note that the slide shaft 7 is marked with a scale for reading the moving distance of the traverse frame, and the turning table 10 is marked with a scale for reading the turning angle. A hydraulic pump 38 mounted on the trolley 1 and operated by power transmission from a diesel engine 37 is used as a drive source for each of the above-mentioned drive devices, and each drive device is actuated by hydraulic pressure through each pipe. Of course, this is not limited to hydraulic pressure as in the embodiment, but may also be performed using electric power, pneumatics, or mechanical operation. Therefore, the cutting tool 21 and the sleeve support 3
The mechanism for providing 0 with the adjustment operation of the four eigenvalues in space is not limited to the one shown in the drawings, and may be replaced by other known mechanisms. Further, in the illustrated example, the entire device is mounted on the movable cart 1, but in the present invention, the device may be placed not on the cart but on a fixed pedestal set in advance at a predetermined position. Further, the cutting tool 21 may be a known tool that provides a rotation or a hammer, or both, which are commonly used in rock drills and the like in the mining industry.

Next, the operation of the device of the present invention will be explained. First, as shown in FIG.
The cutter 21 stops at a position substantially facing the container nozzle part 39 where the cutter 1 is to be replaced. Next, using the sleeve hole sighting device 23, as shown in FIG.
3, and adjusted the four eigenvalues in the space of the cutting tool boom 19 to achieve the concentric position as shown in FIG.
Adjust the tilt and lift according to steps 5 and 16 to match. Once the spatial position of the cutter boom 19 is determined, the cutter boom cylinder 25 is operated to remove the cutter 21.
At the same time, the drifter unit 27 is operated to rotate and hammer the cutting tool 21 to crush and remove the old sleeve brick 31. In this case, the cooling water and/or air forced into the shaft of the drifter rod 26 serves to cool the cutting tool 21 and at the same time to discharge the crushed debris of the old sleeve brick 31 produced by the rotation of the cutting tool and the hammering. After removing the old sleeve brick 31, remove the cutter boom cylinder 2.
5 stores the cutting tool 21. Next, before moving the cart, a new sleeve brick 34, which was attached to the sleeve brick support 30 at the tip of the sleeve insertion frame 28, is placed between the cutting tool boom 19 and the sleeve boom 20 with a scale provided on the slide shaft 7 at a certain distance. While reading this, the traversing frame 2 is adjusted to traverse by the action of the traversing cylinder 9 to match the four unique values in the space of the cutting tool boom 19 set at the beginning. Next, the sleeve boom cylinder 29 is operated to advance the sleeve brick support 30 to which the new sleeve brick 34 is attached and install it in the sleeve brick attachment hole 35. In addition, as another installation procedure for the new sleeve brick 34, the new sleeve brick 34 is not attached to the sleeve support 30 in advance, but the sleeve boom 20 is first matched to the four unique values in the space of the cutting tool boom 19, and then the rotating table is installed. 10 at a certain angle, attach the new sleeve brick 34 temporarily placed on the work floor 36 to the sleeve brick support 30, and restore it to the angle before turning using the turning angle scale provided on the turning table 10. Thereafter, it is also possible to operate the sleeve boom cylinder 29 and install the new sleeve brick 34 into the sleeve brick attachment hole 35.

As explained above, according to the apparatus of the present invention, it is possible to mechanically and efficiently remove and attach the sleeve brick, and it is also possible to replace the sleeve brick accurately and quickly depending on the spatial position of the sleeve brick. Therefore, the device of the present invention is most suitable for removing and installing sleeve bricks in harsh environments with high temperatures, such as in the nozzle portion of a molten metal container, and greatly contributes to improved productivity.

[Brief explanation of the drawing]

Fig. 1 is an overall side view showing one embodiment of the device of the present invention, Fig. 2 is a plan view of Fig. 1, and Fig. 3 is a side view showing a situation in which the sleeve hole alignment and the cutting tool entry direction are aligned. . DESCRIPTION OF SYMBOLS 1...Dolly, 2...Transverse frame, 3-6...Slide bearing, 7, 8...Slide shaft, 9...Transverse cylinder,
10... Turning table, 11... Turning motor, 12
...Tilt frame, 13, 14...Tilt pin, 15,
16...Tilt cylinder, 17, 18...Boom connection rod, 19...Cutter boom, 20...Sleeve boom, 21...Cut tool, 22...Sleeve hole alignment, 23
... Sleeve hole sight, 24... Drifter frame, 25... Cutting tool boom cylinder, 26... Drifter rod, 27... Drifter unit, 28...
Sleeve insertion frame, 29...Sleeve boom cylinder, 30...Sleeve supporter, 31...Old sleeve, 32...Inner ring outside the furnace, 33...Inner ring inside the furnace, 3
4...New sleeve, 35...Sleeve brick mounting hole, 3
6... Working floor, 37... Diesel engine, 38... Hydraulic pump.

Claims (1)

[Claims] 1. A traverse pedestal that can freely traverse in a direction perpendicular to the direction of travel of the pedestal is mounted on a trolley with an endless track, and a rotating table that can rotate is installed above the mount. A tilting frame is provided above the table, and a tilting frame is provided above the table, and A tilting cylinder is attached to the end via a tilting pin, the upper end of the cylinder rod is connected below the boom connecting rod, and a cutting tool boom and a sleeve boom are installed parallel to each other on the boom connecting rod in a direction perpendicular to the rod. The cylinder enables the vertical movement and tilting of the cutting tool boom and sleeve boom on the boom connecting rod together, and the cutting tool boom includes a cylinder for moving the cutting tool for dismantling the sleeve brick back and forth, and a cylinder for rotating or impacting the cutting tool. Alternatively, a drifter unit that provides both is provided, and the cutting tool boom is equipped with a sleeve brick hole sight for matching the advancing direction of the cutting tool with the alignment of the sleeve brick hole. A cylinder for moving back and forth a sleeve insertion frame to which a sleeve support for holding sleeve bricks is attached is provided, so that the cutting tool and sleeve support can be moved in any direction in three-dimensional space. Container sleeve brick replacement equipment.