A ladle slag line magnesite carbon brick laying positioning device

Abstract

This invention discloses a positioning device for magnesia-carbon brick masonry in ladle slag lines, specifically relating to the field of ladle slag line masonry technology. It includes a support ring located above the ladle, with a positioning and masonry assembly at the bottom of the support ring. The positioning and masonry assembly includes a first gear ring located at the bottom of the support ring, with a reinforcing ring fixedly connected to the bottom of the first gear ring. This invention uses a first motor to drive the gear ring, causing the reinforcing ring to rotate. Utilizing the sliding engagement of the inclined guide groove and the sliding column, all hinged blocks drive the masonry pressure plate to rotate synchronously and in the same direction. This allows the masonry pressure plate to apply synchronous circumferential pressure to the brick ring through the pressure arc plate, ensuring uniform pressure throughout the entire circumference of the brick ring. This solves the problem of uneven local pressure in manual masonry, laying a core foundation for a stable self-locking structure of the brick ring. Simultaneously, it mechanizes the pressure application operation, replacing manual pressure application and significantly reducing the labor intensity of foundation pressure application.

Description

Technical Field

[0001] This invention relates to the field of ladle slag line masonry technology, and more specifically, to a positioning device for magnesia-carbon brick masonry of ladle slag lines. Background Technology

[0002] The ladle is the core equipment in steel smelting for holding and transferring molten steel. The slag line area, where the inner wall of the ladle comes into contact with the molten slag, is the weakest point in the ladle lining due to the large amount of highly corrosive oxides in the slag. The quality of the magnesia-carbon brickwork in the slag line area directly determines the service life of the ladle and the safety of smelting operations. This construction process requires the use of refractory mortar in conjunction with a brick-locking technique to lay the magnesia-carbon bricks into a complete and dense ring lining. The requirements for the circumferential density and brick fit of the brick ring are extremely high. The natural tapered structure of the ladle's inner wall presents a key technical challenge to the positioning of the magnesia-carbon bricks during construction.

[0003] Currently, the construction of magnesia-carbon bricks for steel ladle slag lines in the industry is mostly done manually, lacking dedicated positioning and pressurizing devices. This makes it impossible to effectively fix and uniformly pressurize the already laid brick rings during construction. In the crucial step of driving in the locking bricks, the unrestrained brick rings are prone to loosening, displacement, or even falling apart, resulting in uneven pressure on the circumference of the brick rings and difficulty in forming a tight physical contact between the bricks. Simultaneously, manual adjustment of pressure to address local deviations in the ladle taper and brick ring construction is difficult, easily causing localized pressure damage to the bricks and uneven gaps between bricks. During subsequent high-temperature use of the ladle, molten steel can easily seep through the brick gaps, exacerbating erosion and damage to the slag line area and significantly shortening the ladle's service life. Furthermore, manual fixing of the brick rings is labor-intensive, and existing simple auxiliary tools are not compatible with ladles of different taper specifications, resulting in poor versatility and further reducing the efficiency and standardization of the construction work. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a positioning device for magnesia-carbon brick masonry of ladle slag line, which aims to solve the problems mentioned in the background art.

[0005] The present invention provides the following technical solution: a positioning device for magnesia-carbon brick masonry of ladle slag line, including a support ring located above the ladle, and a positioning masonry component provided at the bottom of the support ring;

[0006] The positioning and masonry assembly includes a first toothed ring disposed at the bottom of the support ring, a reinforcing ring fixedly connected to the bottom of the first toothed ring, and a plurality of hinge seats evenly distributed along its circumference disposed at the bottom end of the support ring, each hinge seat being hinged with a hinge block, and each hinge block being disposed with a masonry pressure plate at its bottom end. The hinge block deflects around the hinge seat and drives the masonry pressure plate to deflect synchronously, so that the masonry pressure plate abuts against the brick ring on the inner wall of the ladle, thereby temporarily fixing the brick ring.

[0007] The outer side of the masonry pressure plate is provided with a pressure-resistant arc plate, and a shaft pin is hinged to one side of the pressure-resistant arc plate. The shaft pin is fixedly connected to the masonry pressure plate, and the pressure-resistant arc plate can deflect along the axis of the shaft pin to apply pressure to the brick ring.

[0008] The outer side of the reinforcing ring is provided with several oblique guide grooves that correspond one-to-one with the hinge blocks. Each hinge block has a sliding column on one side. The end of the sliding column away from the hinge block extends into the corresponding oblique guide groove and slides in cooperation with the oblique guide groove. When the reinforcing ring rotates, it drives the sliding column to slide along the oblique guide groove, thereby driving the hinge block to deflect around the hinge seat, so as to realize the pressure adjustment of the brick ring by the masonry pressure plate.

[0009] Furthermore, the positioning and masonry assembly also includes a first motor disposed on one side of the bottom of the support ring. The output end of the first motor is provided with a first gear, which is located outside the first gear ring and meshes with it. The first motor drives the first gear to rotate and drives the first gear ring to rotate synchronously. A trapezoidal plate is slidably connected to the side of the masonry pressure plate away from the shaft pin. The trapezoidal plate is sandwiched between the masonry pressure plate and the pressure arc plate. The cross-section of the trapezoidal plate is trapezoidal. The trapezoidal plate slides along the masonry pressure plate and abuts against the side of the pressure arc plate, thereby driving the pressure arc plate to deflect along the axis of the shaft pin. Several parallel adjustment holes are opened through the trapezoidal plate along its sliding direction. A positioning knob is threadedly connected to the masonry pressure plate. One end of the positioning knob can be screwed into the corresponding adjustment hole to realize the positioning and locking of the trapezoidal plate after displacement.

[0010] Furthermore, a lifting ring is rotatably connected to the top of the support ring, and a connecting cover is provided on one side of the inner wall of the lifting ring. A second gear ring is rotatably connected to the middle of the lifting ring, and the connecting cover is provided on the outside of the second gear ring. The second gear ring is fixedly connected to the top of the support ring by bolts. A second gear is rotatably connected to the connecting cover, and the second gear meshes with the second gear ring. A second motor is provided on the top of the connecting cover, and the output end of the second motor is connected to the second gear for transmission. The second motor drives the second gear to rotate and drives the second gear ring to rotate synchronously, thereby driving the support ring to rotate circumferentially on the top of the ladle. The cross-section of the pressure arc plate is arc-shaped, and several pressure arc plates are evenly distributed circumferentially along the circumference of the support ring.

[0011] The technical effects and advantages of this invention are as follows:

[0012] 1. This invention uses a first motor to drive a gear ring transmission, which drives the reinforcing ring to rotate. By utilizing the sliding fit between the inclined guide groove and the sliding column, all hinge blocks drive the masonry pressure plate to rotate synchronously and in the same direction. This allows the masonry pressure plate to apply synchronous circumferential pressure to the brick ring through the pressure arc plate, ensuring that the brick ring bears uniform pressure throughout the entire circumference. This solves the problem of uneven local pressure in manual masonry and lays the core foundation for the formation of a stable self-locking structure in the brick ring. At the same time, it realizes the mechanization of the pressure application operation, replacing manual pressure application and greatly reducing the labor intensity of foundation pressure application.

[0013] 2. Based on uniform circumferential pressure, this invention utilizes the cooperative structure of a trapezoidal plate and an arc-shaped pressure plate on the masonry pressure plate. The sliding trapezoidal plate allows for precise micro-adjustment of the pressure on the arc-shaped pressure plate. Combined with the close contact between the arc-shaped pressure plate and the inner wall of the ladle, this increases the contact area, avoids local pressure damage to the bricks, and allows for adjustment of the local pressure force according to the actual situation of the brick ring masonry. This further improves the fit between the bricks, allowing the brick ring to form a preliminary tight physical contact. This optimizes the forming density of the self-locking structure and complements the effect of uniform circumferential pressure, making the pressure effect of the brick ring more consistent with the tapered structure of the ladle.

[0014] 3. The circumferential rotating assembly of this invention, consisting of a second motor, a second gear ring, and a second gear, can drive the support ring and the bottom positioning and masonry assembly to achieve circumferential rotation. It can adjust the pressure position for local masonry deviations of the brick ring, so that the effect of uniform circumferential pressure covers the entire circumference of the brick ring. At the same time, it is compatible with the masonry operation of steel ladle slag lines with different taper specifications, which improves the versatility of the device and ensures that this invention can achieve uniform and precise pressure effect on steel ladles of different specifications, ensuring that a high-quality self-locking structure can be formed when masonrying various types of steel ladles. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0016] Figure 1 This is a side view of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the support ring, first toothed ring, reinforcing ring, masonry pressure plate, pressure arc plate, trapezoidal plate, inclined guide groove and adjustment hole of the present invention.

[0018] Figure 3This is a schematic diagram showing the support ring, first gear ring, reinforcing ring, first motor, first gear, and pressure arc plate of the present invention assembled together.

[0019] Figure 4 This is a schematic diagram of the reinforcing ring, inclined guide groove, masonry pressure plate, trapezoidal plate, and other components of the present invention.

[0020] Figure 5 This is a schematic diagram of the support ring, hinge seat, first motor, and first gear of the present invention.

[0021] Figure 6 For the present invention Figure 4 Exploded view.

[0022] Figure 7 This is a schematic diagram of the lifting ring, connecting cover, and second gear of the present invention.

[0023] The attached figures are labeled as follows: 1. Support ring; 2. First gear ring; 3. Reinforcing ring; 4. Hinge seat; 5. Hinge block; 6. Masonry pressure plate; 7. Pressing arc plate; 8. Shaft pin; 9. Inclined guide groove; 10. Sliding column; 11. First motor; 12. First gear; 13. Trapezoidal plate; 14. Positioning knob; 15. Adjustment hole; 16. Lifting ring; 17. Connecting cover; 18. Second gear ring; 19. Second gear; 20. Second motor. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0025] Example 1

[0026] This embodiment discloses a positioning device for laying magnesia-carbon bricks in ladle slag lines. It is applicable to the laying and positioning of magnesia-carbon bricks in ladle slag lines with different taper specifications. It solves the technical problems of easy loosening and displacement of brick rings, uneven circumferential pressure, and poor contact of bricks during the existing laying process of magnesia-carbon bricks in ladle slag lines.

[0027] like Figure 1 The diagram shows a side view of the overall structure of the device. The core load-bearing component of the device is the support ring 1, which is a ring-shaped steel structure. Its inner diameter is matched with the inner diameter of the top opening of the ladle, allowing it to be stably erected at the top opening of the ladle. The bottom of the support ring 1 is equipped with a positioning and pressing component for positioning the brick ring, and the top is equipped with a hoisting and rotating component for hoisting and rotating the device. The hoisting and rotating component includes a hoisting ring 16, a connecting cover 17, a second gear ring 18, a second gear 19, and a second motor 20. The hoisting ring 16 can be used in conjunction with lifting equipment to complete the overall hoisting and positioning of the device.

[0028] like Figure 2 , Figure 3 and Figure 5As shown, the core transmission components of the positioning and masonry assembly are the first gear ring 2 and the reinforcing ring 3. The first gear ring 2 is rotatably connected to the bottom end face of the support ring 1, and the reinforcing ring 3 is welded to the bottom end face of the first gear ring 2. The three are coaxially arranged to ensure concentricity during rotation. Several hinge seats 4 are uniformly welded circumferentially to the bottom end face of the support ring 1. Each hinge seat 4 is hinged to a hinge block 5 by a pin. A masonry pressure plate 6 is welded to the bottom end of the hinge block 5. The masonry pressure plate 6 is a straight plate structure, and its length is adapted to the axial height of the steel ladle slag line brick ring.

[0029] like Figure 2 , Figure 4 and Figure 6 As shown, several inclined guide grooves 9, corresponding one-to-one with the hinge blocks 5, are circumferentially opened on the outer side of the reinforcing ring 3. The inclined guide grooves 9 are opened at an angle, and their inclination angle is adapted to the taper of the inner wall of the steel ladle. Each hinge block 5 has a sliding column 10 welded on the side near the reinforcing ring 3. The end of the sliding column 10 away from the hinge block 5 extends into the corresponding inclined guide groove 9 and slides in cooperation with the inclined guide groove 9. The outer diameter of the sliding column 10 is adapted to the width of the inclined guide groove 9, with no obvious gap, to ensure the accuracy of sliding transmission. A pressure arc plate 7 is provided on the outer side of the masonry pressure plate 6. The cross-section of the pressure arc plate 7 is arc-shaped, which fits the arc structure of the inner wall of the steel ladle, which can increase the contact area with the brick ring and avoid local damage to the brick. One side of the pressure arc plate 7 is hinged to the masonry pressure plate 6 through a shaft pin 8. The shaft pin 8 is welded to the outer wall of the masonry pressure plate 6, and the pressure arc plate 7 can freely deflect along the axis of the shaft pin 8.

[0030] Example 2

[0031] Based on Example 1, this embodiment, for example Figure 3 , Figure 4 and Figure 6 As shown, a groove is provided on the side of the masonry pressure plate 6 away from the shaft pin 8. A trapezoidal plate 13 is slidably connected in the groove. The trapezoidal plate 13 is sandwiched between the masonry pressure plate 6 and the pressure arc plate 7. Its cross-section is an isosceles trapezoid. The inclined surface of the trapezoidal plate 13 is in contact with the inner side wall of the pressure arc plate 7. Several parallel adjustment holes 15 are provided on the trapezoidal plate 13 along its sliding direction. A positioning knob 14 is threaded on the masonry pressure plate 6. The screw end of the positioning knob 14 can be screwed into the corresponding adjustment hole 15 to realize the positioning and locking of the trapezoidal plate 13. A first motor 11 is welded to one side of the bottom of the support ring 1 through the motor bracket. The first motor 11 is a servo reduction motor. Its output end is connected to a first gear 12 through a coupling. The first gear 12 meshes with the outer teeth of the first gear ring 2 to form a gear transmission pair.

[0032] like Figure 1 , Figure 7As shown, a lifting ring 16 is rotatably connected to the top of the support ring 1 via a thrust bearing. The lifting ring 16 has a ring structure, which facilitates the hooking of the lifting equipment. A connecting cover 17 is welded to one side of the inner wall of the lifting ring 16. The connecting cover 17 is a cover body that covers the outside of the second gear ring 18 in the middle of the lifting ring 16. The second gear ring 18 is rotatably connected to the lifting ring 16 via a thrust bearing, and the bottom of the second gear ring 18 is fixedly connected to the top end face of the support ring 1 via multiple bolts to achieve synchronous rotation with the support ring 1. A second gear 19 is rotatably connected to the connecting cover 17 via a rotating shaft. The second gear 19 meshes with the teeth of the second gear ring 18. A second motor 20 is welded to the top of the connecting cover 17 via a motor bracket. The second motor 20 is a servo geared motor, and its output end is connected to the rotating shaft of the second gear 19 to form a gear transmission pair.

[0033] Each pressure-reducing arc plate 7 of this device is evenly distributed circumferentially along the support ring 1. After being spliced ​​together, they form a complete arc-shaped ring that fits perfectly against the slag line part of the inner wall of the ladle, ensuring uniform pressure on the circumference of the brick ring.

[0034] The specific working principle is as follows:

[0035] The working process of this device is mainly divided into five stages: hoisting and positioning, coarse pressurization by laying the pressure plate, fine pressurization by the pressure arc plate, circumferential rotation adjustment of the device, and brick locking and pressure maintenance. The component linkages and operation of each stage are as follows:

[0036] hoisting and positioning stage

[0037] The entire device is hoisted to the top of the steel ladle to be built by hooking the lifting ring 16 with the hook of the lifting equipment. The device is then slowly lowered so that the support ring 1 is stably placed at the top opening of the steel ladle, ensuring that the support ring 1 is coaxial with the steel ladle. At this time, the masonry pressure plate 6 and the pressure arc plate 7 are in a naturally open state. The outer wall of the plate and the slag line brick ring of the inner wall of the steel ladle have a reserved adjustment gap for subsequent pressure adjustment.

[0038] Masonry pressing stage

[0039] Start the first motor 11, which drives the first gear 12 to rotate clockwise. The first gear 12 drives the meshing first gear ring 2 to rotate clockwise synchronously. The first gear ring 2 drives the bottom reinforcing ring 3 to rotate clockwise coaxially. Figure 4 , Figure 6As shown, when the reinforcing ring 3 rotates, the inclined guide groove 9 and the sliding column 10 slide relative to each other. The inclined surface of the inclined guide groove 9 generates a thrust on the sliding column 10, driving the sliding column 10 to slide along the inclined guide groove 9 towards the inner wall of the ladle. This, in turn, causes the hinge block 5 to deflect around the hinge seat 4 towards the inner wall of the ladle. The hinge block 5 drives the bottom masonry pressure plate 6 to deflect synchronously until the masonry pressure plate 6 initially contacts the slag line brick ring on the inner wall of the ladle through the pressure arc plate 7. The first motor 11 is turned off. The self-locking function of the first motor 11 can prevent the reinforcing ring 3 from rotating in the opposite direction, realizing the temporary coarse pressure of the masonry pressure plate 6 on the brick ring, so that the brick ring is initially positioned and the overall displacement of the brick ring is avoided.

[0040] Precision pressurization stage of the pressure arc plate

[0041] Based on the initial coarse pressure, the pressure adjustment of the pressure arc plate 7 is precisely adjusted according to the compaction requirements of the brick ring: the trapezoidal plate 13 is manually pushed to slide along the groove of the masonry pressure plate 6. The trapezoidal inclined surface of the trapezoidal plate 13 abuts against the inner wall of the pressure arc plate 7. As the trapezoidal plate 13 slides, its inclined surface generates an outward pushing force on the pressure arc plate 7, driving the pressure arc plate 7 to deflect along the axis of the shaft pin 8 towards the inner wall of the steel ladle until the pressure arc plate 7 is tightly fitted against the outer wall of the brick ring, thus achieving precise pressure on the brick ring. After the trapezoidal plate 13 slides to the designated position, the positioning knob 14 is tightened so that the screw end of the positioning knob 14 is screwed into the corresponding adjustment hole 15, thereby achieving the positioning and locking of the trapezoidal plate 13, thus ensuring that the pressure position of the pressure arc plate 7 remains unchanged, so that all parts of the brick ring are subjected to uniform pressure, and a self-locking structure is initially formed.

[0042] Circumferential rotation adjustment stage of the device

[0043] If there is a local masonry deviation in the brick ring at the slag line of the ladle, and the device needs to be circumferentially rotated for adjustment, the second motor 20 is started. The second motor 20 drives the second gear 19 to rotate, and the second gear 19 drives the meshing second gear ring 18 to rotate synchronously. The second gear ring 18 is fixedly connected to the support ring 1, thereby driving the support ring 1 and the bottom positioning masonry component to rotate circumferentially around the axis of the ladle, adjusting the contact position between the pressure arc plate 7 and the brick ring. After rotating to the designated position, the second motor 20 is turned off. The self-locking function of the second motor 20 can prevent the support ring 1 from rotating in the opposite direction, realizing the circumferential positioning of the device, which facilitates targeted pressure on the local deviation parts of the brick ring.

[0044] Brick locking operation pressure holding stage

[0045] After the pressurization and adjustment are completed, the device maintains continuous pressure on the brick ring. Workers then perform the brick-locking operation inside the ladle, inserting the locking brick into the pre-reserved gaps in the brick ring. Because the multiple pressure-reducing arc plates 7 of the device are evenly distributed along the circumference of the ladle, the entire circumference of the brick ring is subjected to uniform pressure. When the locking brick is inserted, the brick ring will not loosen, shift, or scatter. Furthermore, the pressure-reducing arc plates 7 are tightly fitted to the brick ring, ensuring that after the locking brick is inserted, the entire brick ring forms a tight physical contact, ultimately creating a stable self-locking structure. During subsequent high-temperature use of the ladle, the brick body expands due to heat, further increasing the compressive force between the brick rings, effectively preventing molten steel from seeping through the brick gaps and improving the service life and safety of the ladle.

[0046] After the brick-locking operation is completed, the first motor 11 is started in reverse, driving the first gear 12 to rotate counterclockwise, which in turn drives the reinforcing ring 3 to rotate counterclockwise. The inclined guide groove 9 drives the sliding column 10 to slide away from the inner wall of the ladle. The hinge block 5 deflects in the opposite direction around the hinge seat 4, causing the masonry pressure plate 6 and the pressure arc plate 7 to separate from the brick ring. Then, the device is lifted off the ladle by the lifting equipment, completing the masonry positioning operation of the magnesia-carbon bricks for the ladle slag line.

[0047] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A positioning device for magnesia-carbon brick masonry of a ladle slag line, comprising a support ring (1) located above the ladle, characterized in that: The bottom of the support ring (1) is provided with a positioning masonry component; The positioning and masonry assembly includes a first toothed ring (2) set at the bottom of the support ring (1), and a reinforcing ring (3) is fixedly connected to the bottom of the first toothed ring (2). The bottom end of the support ring (1) is provided with a number of hinge seats (4) evenly distributed along its circumference. Each hinge seat (4) is hinged with a hinge block (5). The bottom end of each hinge block (5) is provided with a masonry pressure plate (6). The hinge block (5) deflects around the hinge seat (4) and drives the masonry pressure plate (6) to deflect synchronously, so that the masonry pressure plate (6) abuts against the brick ring on the inner wall of the steel ladle, thereby achieving temporary fixation of the brick ring. The outer side of the masonry pressure plate (6) is provided with a pressure arc plate (7), and a shaft pin (8) is hinged to one side of the pressure arc plate (7). The shaft pin (8) is fixedly connected to the masonry pressure plate (6). The pressure arc plate (7) can deflect along the axis of the shaft pin (8) to apply pressure to the brick ring. The outer side of the reinforcing ring (3) is provided with several inclined guide grooves (9) corresponding to the hinge blocks (5). Each hinge block (5) has a sliding column (10) on one side. The end of the sliding column (10) away from the hinge block (5) extends into the corresponding inclined guide groove (9) and slides in cooperation with the inclined guide groove (9). When the reinforcing ring (3) rotates, it drives the sliding column (10) to slide along the inclined guide groove (9), thereby driving the hinge block (5) to deflect around the hinge seat (4) and realize the pressure adjustment of the brick ring by the masonry pressure plate (6). A trapezoidal plate (13) is slidably connected to the side of the masonry pressure plate (6) away from the shaft pin (8). The trapezoidal plate (13) is sandwiched between the masonry pressure plate (6) and the pressure arc plate (7). The cross-section of the trapezoidal plate (13) is trapezoidal. The trapezoidal plate (13) slides along the masonry pressure plate (6) and abuts against the side of the pressure arc plate (7), thereby driving the pressure arc plate (7) to deflect along the axis of the shaft pin (8). The top of the support ring (1) is rotatably connected to a lifting ring (16), and a connecting cover (17) is provided on one side of the inner wall of the lifting ring (16). The middle part of the lifting ring (16) is rotatably connected to a second toothed ring (18), and the connecting cover (17) is placed on the outside of the second toothed ring (18). The second toothed ring (18) is fixedly connected to the top of the support ring (1) by bolts. A second gear (19) is rotatably connected to the connecting cover (17), and the second gear (19) meshes with the second gear ring (18).

2. The positioning device for magnesia-carbon brick masonry of ladle slag line according to claim 1, characterized in that: The positioning and masonry assembly also includes a first motor (11) disposed on one side of the bottom of the support ring (1). The output end of the first motor (11) is provided with a first gear (12). The first gear (12) is located outside the first gear ring (2) and meshes with the first gear ring (2). The first motor (11) drives the first gear (12) to rotate and drives the first gear ring (2) to rotate synchronously.

3. The positioning device for magnesia-carbon brick masonry of ladle slag line according to claim 1, characterized in that: The trapezoidal plate (13) has several parallel adjustment holes (15) through it along its sliding direction, and the masonry pressure plate (6) is threaded with a positioning knob (14).

4. The positioning device for magnesia-carbon brick masonry of ladle slag line according to claim 3, characterized in that: One end of the positioning knob (14) can be screwed into the corresponding adjustment hole (15) to achieve positioning and locking of the displaced trapezoidal plate (13).

5. The positioning device for magnesia-carbon brick masonry of ladle slag line according to claim 1, characterized in that: The top of the connecting cover (17) is provided with a second motor (20). The output end of the second motor (20) is connected to the second gear (19) for transmission. The second motor (20) drives the second gear (19) to rotate and drives the second gear ring (18) to rotate synchronously, thereby driving the support ring (1) to rotate circumferentially on the top of the steel ladle.

6. The positioning device for magnesia-carbon brick masonry of ladle slag line according to claim 1, characterized in that: The cross-section of the pressure arc plate (7) is arc-shaped, and several pressure arc plates (7) are evenly distributed circumferentially along the support ring (1).

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