Front wall structure capable of being replaced in hot state

Abstract

The invention discloses a front wall structure capable of being replaced in a hot state, and belongs to the technical field of glass manufacturing, the front wall structure comprises a pool bottom and a pool wall, side stand columns are fixedly connected to the two sides of the outer wall of the pool wall respectively, and an arc-shaped top beam and a connecting mechanism are fixedly connected between the side stand columns. The height of the refractory brick can be easily adjusted through the threaded suspender by means of threaded connection between the threaded hole in the bottom end of the rotating rod and the threaded suspender, so that the refractory brick can be quickly disassembled and assembled without the need for a maintainer to make close contact with a high-temperature area in a thermal state environment even if the temperature in the kiln is very high; the problem that a traditional L-shaped hanging structure is difficult to approach a damaged part during thermal maintenance is solved, online replacement of eroded refractory bricks of a wall body can be realized, the maintenance difficulty is greatly reduced, the production interruption time caused by maintenance is effectively reduced, the continuous operation capability of a glass kiln is improved, and the production stability and efficiency are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of glass manufacturing, and particularly to a front wall structure that can be replaced in a hot state. Background Art

[0002] A glass melting furnace is a thermal equipment used in the glass manufacturing industry to melt glass batch materials. It melts, clarifies, and forms glass liquid that meets the forming requirements from the raw materials prepared according to the glass composition at high temperatures. There are various types of glass melting furnaces, such as crucible furnaces, tank furnaces, etc. Each type has its unique design and working principle to adapt to different scales and types of glass production requirements. Inside the furnace, the glass raw materials will undergo a series of complex physical and chemical changes, and finally form uniform glass liquid, providing a basis for subsequent glass forming processes.

[0003] In the prior art, currently, the front wall structure of glass furnaces widely used in China is an L-shaped hanging structure. However, many problems that need to be solved urgently have emerged in the actual use of this structure.

[0004] First of all, the refractory materials used in the hanging wall are prone to erosion and spalling under harsh working conditions such as long-term high temperature and erosion. Once the refractory materials are eroded and spalled, it is extremely difficult to repair them in a hot state environment. Since the inside of the furnace is in a high-temperature state, it is difficult for maintenance personnel to approach the damaged part for repair operations. Moreover, as time goes by, the temperature inside the furnace will become higher and higher, which poses a great threat to the overall safety of the wall, may cause damage or even collapse of the wall structure, and then affect the continuous operation of the furnace, resulting in production interruption and economic losses.

[0005] Secondly, during the operation of the L-shaped hanging structure, in order to ensure the stability of the steel structure, it is necessary to consume the electric energy of the fan for blowing and cooling. This undoubtedly increases the energy consumption of glass production and raises the production cost. Against the background of advocating energy conservation and emission reduction at present, this phenomenon of energy waste is contrary to the concept of sustainable development and is not conducive to the long-term development of the glass manufacturing industry. Summary of the Invention

[0006] In order to solve the problems of difficult hot-state maintenance of the front wall structure of the existing glass furnace, once local problems affect the overall safety, and in addition, the need for continuous forced cooling by the fan increases the energy consumption and it is not easy to detect the softening of the steel structure, the present invention helps to solve the above problems.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows: A front wall structure that can be replaced in a hot state, including a pool bottom and a pool wall. On both sides of the outer wall of the pool wall, side columns are respectively fixedly connected, and an arc-shaped top beam is fixedly connected between the side columns. A set of symmetric diagonal tie rods are also fixedly connected between the side columns and the arc-shaped top beam through bolts and first nuts. And a number of connecting mechanisms are arranged on the arc-shaped top beam. The connecting mechanism includes an adjusting cylinder, a threaded hanging rod, and a knob. The adjusting cylinder is movably connected in the top surface of the arc-shaped top beam through limit rings at the upper and lower ends, and the knob is movably connected to the top end of the adjusting cylinder through a rotating rod at the bottom end. The threaded hanging rod is movably connected to the threaded hole opened at the bottom end of the rotating rod and passes through the knob, and a refractory brick is fixedly connected to the bottom surface of the hanging plate at the bottom end of the threaded hanging rod through a second nut.

[0008] Preferably, there are three groups of left-right symmetric side columns, and the three groups of side columns gradually become shorter from back to front. The side columns are also fixedly installed on the outer side wall of the pool wall, and an arc-shaped top beam is fixedly installed between the left-right symmetric side columns.

[0009] Preferably, concave plates are respectively fixedly installed on both sides of the top surface of the arc-shaped top beam and at the top ends of the inner side walls of the side columns, and connecting holes are respectively opened on both sides of the inner wall of the concave opening of the concave plate. Connecting cylinders are respectively fixedly installed at both ends of the diagonal tie rod, and the connecting cylinders are located in the concave opening of the concave plate. The bolt is inserted and installed in the connecting hole and passes through the connecting cylinder, and the first nut is threadedly connected to the bolt.

[0010] Preferably, a number of cross-shaped slot holes are also opened on the top surface of the arc-shaped top beam.

[0011] Preferably, the adjusting cylinder is inserted and installed in the cross-shaped slot hole, and limit rings that are closely attached to the arc-shaped surface of the arc-shaped top beam are respectively fixedly installed at the upper and lower ends of the outer wall of the adjusting cylinder. An annular limit groove is opened above the inner wall of the adjusting cylinder, and a set of symmetric guide bars are fixedly installed below the inner wall of the adjusting cylinder.

[0012] Preferably, a rotating rod is fixedly installed on the bottom surface of the knob, and the rotating rod is movably installed in the adjusting cylinder. A rotating ring is fixedly installed on the outer wall of the rotating rod, and the rotating ring is movably installed in the annular limit groove. A threaded hole penetrating the knob is also opened at the bottom end of the rotating rod.

[0013] Preferably, the threaded hanging rod is threadedly connected to the threaded hole, and guide grooves corresponding to the guide bars are opened on the outer wall of the threaded hanging rod. A hanging plate is fixedly installed at the bottom end of the threaded hanging rod, and a set of left-right symmetric mounting holes are opened on the top surface of the hanging plate.

[0014] Preferably, a set of symmetrically arranged threaded short rods are fixedly installed on the top surface of the refractory brick, and the threaded short rods are inserted into the installation holes. The second nut is threadedly connected to the threaded short rods. A caulking brick is also fixedly installed on one side of the top surface of the refractory brick, and the refractory brick has a staggered joint structure.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, for the provided connection mechanism, the operator only needs to rotate the knob. By using the threaded connection between the screw hole at the bottom end of the rotating rod and the threaded hanging rod, the height of the refractory brick can be easily adjusted through the threaded hanging rod. This enables, even in a hot environment where the temperature inside the kiln is very high, the maintenance personnel to quickly disassemble and install the refractory brick without having to get close to the high-temperature area. It solves the problem that it is difficult to access the damaged part during hot-state maintenance of the traditional L-shaped hanging structure, and can realize the online replacement of the refractory brick eroded by the wall, greatly reducing the maintenance difficulty, effectively reducing the production interruption time caused by maintenance, improving the continuous operation ability of the glass kiln, and ensuring the stability and efficiency of production. Moreover, a stable support system is formed by the side columns, the arc top beam and the diagonal tie rods. The side columns are arranged in three groups symmetrically on the left and right and gradually become shorter from back to front, which can better disperse the pressure borne by the wall and enhance the overall stability of the wall. The diagonal tie rods are fixedly connected to the side columns and the arc top beam through bolts and the first nuts, further strengthening the structure, enabling it to withstand the thermal stress and other external forces in a high-temperature environment, reducing the risk of damage to the wall due to structural instability, and ensuring the safe operation of the glass kiln. Different from the traditional L-shaped hanging structure that needs to consume the electric energy of the fan to cool the steel structure, by hoisting the refractory brick through the connection mechanism, the arc top beam and the connection mechanism are both exposed to the air and can be naturally cooled by the air, reducing the power consumption of the fan. And the usage state during the use process can be clearly observed, improving the overall safety, conforming to the current development trend of energy conservation and emission reduction, effectively reducing the cost of glass production, and improving the economic and environmental benefits of the enterprise. At the same time, the refractory brick adopts a staggered joint structure, and a caulking brick is fixedly installed on one side of the top surface, effectively enhancing the sealing performance of the front wall, reducing the heat dissipation and the leakage of the furnace gas. This not only improves the energy utilization efficiency but also prevents the high-temperature gas in the furnace from damaging the surrounding environment and equipment, further enhancing the overall performance and safety of the glass kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the split structural schematic diagram of the side column, the arc top beam and the concave plate of the present invention; Figure 3 is of the present inventionFigure 2 Schematic enlarged view of the structure at location A; Figure 4 This is for the present invention Figure 3 Schematic enlarged view of the structure at location B; Figure 5 Schematic overall structure view of the refractory brick of the present invention; Figure 6 Schematic disassembled view of the structure of the connecting mechanism of the present invention; Figure 7 This is for the present invention Figure 6 Schematic enlarged view of the structure at location C.

[0017] In the figure: 1, bottom of the pool; 2, pool wall; 3, refractory brick; 4, connecting mechanism; 5, side column; 6, arc top beam; 7, concave plate; 8, connecting hole; 9, diagonal tension rod; 10, connecting cylinder; 11, bolt; 12, first nut; 13, cross-shaped slot hole; 14, threaded short rod; 15, joint brick; 16, hanging plate; 17, mounting hole; 18, second nut; 19, threaded suspension rod; 20, guide groove; 21, adjusting cylinder; 22, limiting ring; 23, annular limiting groove; 24, guide bar; 25, knob; 26, rotating rod; 27, rotating ring; 28, threaded hole. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] As Figure 1 - Figure 7 shown, a front wall structure that can be replaced in a hot state includes a bottom of the pool 1 and a pool wall 2. On both sides of the outer wall of the pool wall 2, side columns 5 are respectively fixedly connected, and an arc top beam 6 is fixedly connected between the side columns 5. A group of symmetric diagonal tension rods 9 are also fixedly connected between the side columns 5 and the arc top beam 6 through bolts 11 and first nuts 12. And a plurality of connecting mechanisms 4 are arranged on the arc top beam 6. The connecting mechanism 4 includes an adjusting cylinder 21, a threaded suspension rod 19, and a knob 25. The adjusting cylinder 21 is movably connected in the top surface of the arc top beam 6 through limiting rings 22 at the upper and lower ends, and the knob 25 is movably connected to the top end of the adjusting cylinder 21 through a rotating rod 26 at the bottom end. The threaded suspension rod 19 is movably connected to a threaded hole 28 opened at the bottom end of the rotating rod 26 and passes through the knob 25. And the bottom surface of the hanging plate 16 at the bottom end of the threaded suspension rod 19 is also fixedly connected with a refractory brick 3 through a second nut 18.

[0020] As Figure 1 and Figure 2As shown, there are three groups of side columns 5 that are symmetric left and right, and the three groups of side columns 5 gradually become shorter from back to front. The side columns 5 are also fixedly installed on the outer side wall of the pool wall 2, and an arc-shaped top beam 6 is fixedly installed between the symmetric left and right side columns 5 to provide a support foundation for the entire front wall structure. The arc-shaped top beam 6 is installed between the symmetric left and right side columns 5. Utilizing the structural characteristics of the arc, the force can be more evenly dispersed, enhancing the stability of the front wall structure. The design of the gradually shorter side columns 5 conforms to the mechanical principle, which helps to better bear the weight and external forces of the upper structure, ensuring that the entire front wall remains stable during the operation of the glass furnace; As Figure 2 and Figure 3 shown, concave plates 7 are respectively fixedly installed on both sides of the top surface of the arc-shaped top beam 6 and at the top ends of the inner side walls of the side columns 5, and connection holes 8 are respectively opened on both sides of the inner wall of the concave opening of the concave plate 7. Connecting cylinders 10 are respectively fixedly installed at both ends of the inclined tie rod 9, and the connecting cylinder 10 is located within the concave opening of the concave plate 7. Bolts 11 are inserted into the connection holes 8 and pass through the connecting cylinder 10, and the first nuts 12 are threadedly connected to the bolts 11. The inclined tie rod 9 plays a pulling role, forming a stable triangular structure with the arc-shaped top beam 6 and the side columns 5, strengthening the bearing capacity of the arc-shaped top 6, making the entire structure more stable, and the triangular structure has stability, which can effectively resist external forces, preventing the arc-shaped top beam 6 from deforming or displacing when bearing the weight of the refractory bricks 3, etc., ensuring the safety of the front wall structure; As Figure 3 and Figure 4 shown, a number of cross-shaped slot holes 13 are also opened on the top surface of the arc-shaped top beam 6 to provide installation and movement space for the adjusting cylinder 21, enabling the adjusting cylinder 21 to move within a certain range in the slot holes, creating conditions for fine-tuning the position of the refractory bricks 3. When installing and replacing the refractory bricks 3, it is convenient to adjust their positions according to actual needs, ensuring that the refractory bricks 3 are installed tightly, improving the sealing performance and overall performance of the front wall; As Figure 6 and Figure 7 shown, the adjusting cylinder 21 is inserted and installed in the cross-shaped slot holes 13, and limiting rings 22 that are in close contact with the arc-shaped surface of the arc-shaped top beam 6 are respectively fixedly installed at the upper and lower ends of the outer wall of the adjusting cylinder 21. The limiting rings 22 restrict the axial movement of the adjusting cylinder 21, ensuring the stable installation and movement of the adjusting cylinder 21 in the cross-shaped slot holes 13. An annular limiting groove 23 is opened above the inner wall of the adjusting cylinder 21, and the annular limiting groove 23 cooperates with the rotating ring 27 on the rotating rod 26, enabling the rotating rod 26 to only rotate within the adjusting cylinder 21 without coming out. A set of symmetric guide bars 24 are fixedly installed below the inner wall of the adjusting cylinder 21, and the guide bars 24 cooperate with the guide grooves 20 on the threaded suspension rod 19 to guide the moving direction of the threaded suspension rod 19; As Figure 6 and Figure 7As shown, a rotating rod 26 is fixedly installed on the bottom surface of the knob 25, and the rotating rod 26 is movably installed in the adjusting cylinder 21. A rotating ring 27 is fixedly installed on the outer wall of the rotating rod 26, and the rotating ring 27 is movably installed in the annular limiting groove 23. A threaded hole 28 penetrating through the knob 25 is further opened at the bottom end of the rotating rod 26. By using the principle of screw drive, the rotational motion of rotating the knob 25 is converted into the linear motion of the threaded suspension rod 19, which facilitates the operator to adjust the height of the threaded suspension rod 19 through a simple operation of rotating the knob 25. The operation is simple and easy to control, providing convenience for adjusting the position of the refractory brick 3 during hot-state replacement of the refractory brick 3; As Figure 6 and Figure 7 shown, the threaded suspension rod 19 is threadedly connected to the threaded hole 28, and a guide groove 20 corresponding to the guide bar 24 is opened on the outer wall of the threaded suspension rod 19. The guide groove 20 on the outer wall of the threaded suspension rod 19 cooperates with the guide bar 24 on the inner wall of the adjusting cylinder 21 to ensure the stability of the lifting process of the refractory brick 3. A hanging plate 16 is fixedly installed at the bottom end of the threaded suspension rod 19, and a group of symmetrically arranged mounting holes 17 are opened on the top surface of the hanging plate 16. The mounting holes 17 opened on the hanging plate 16 at the bottom end of the threaded suspension rod 19 are used to connect with the threaded short rods 14 on the top surface of the refractory brick 3, realizing the stable hanging of the refractory brick 3. And by adjusting the height of the threaded suspension rod 19, the position of the refractory brick 3 can be accurately adjusted, enabling the refractory brick 3 to be accurately positioned during installation and replacement. At the same time, since the arc-shaped top beam 6 and the connecting mechanism 4 are both exposed to the air, they can be naturally cooled by the air, reducing the power consumption of the fan, and the usage state during the use process can be clearly observed, improving the overall safety; As Figure 5 and Figure 6 shown, a group of symmetrically arranged threaded short rods 14 are fixedly installed on the top surface of the refractory brick 3, and the threaded short rods 14 are inserted and installed in the mounting holes 17. The second nut 18 is threadedly connected to the threaded short rods 14. A caulking brick 15 is further fixedly installed on one side of the top surface of the refractory brick 3, and the refractory brick 3 has a staggered joint structure. After the threaded short rods 14 on the top surface of the refractory brick 3 pass through the mounting holes 17 opened on the hanging plate 16, they are fixed with the second nut 18, making the connection between the refractory brick 3 and the hanging plate 16 firm, ensuring the firm installation of the refractory brick 3, preventing the refractory brick 3 from loosening or falling off during the hot-state environment and the operation of the kiln. And the caulking brick 15 on one side of the top surface of the refractory brick 3 is used to fill the gap. The caulking brick 15 and the staggered joint structure effectively reduce heat dissipation and gas leakage, improving the heat insulation performance and overall sealing performance of the front wall, and ensuring the efficient operation of the glass kiln.

[0021] The specific replacement principle and steps of this front wall structure that can be replaced during hot state are as follows: When the refractory brick 3 in the front wall needs to be replaced due to erosion, the knob 25 on the top surface of the arc-shaped top beam 6 corresponding to the eroded refractory brick 3 can be rotated. The knob 25 will drive the rotating rod 26 to rotate within the adjusting cylinder 21. The rotating ring 27 on the outer wall of the rotating rod 26 will rotate within the annular limiting groove 23 opened on the inner wall of the adjusting cylinder 21 to achieve the positioning rotation of the knob 25 and prevent the knob 25 from falling off the adjusting cylinder 21. When the rotating rod 26 is rotating in a positioned manner, since the threaded suspension rod 19 is threadedly connected to the threaded hole 28 opened at the bottom end of the rotating rod 26, the threaded suspension rod 19 will move upward along the threaded hole 28. Moreover, the threaded suspension rod 19 will also move along the guide bar 24 installed on the inner wall of the adjusting cylinder 21 through the guide groove 20 opened on its outer wall to play a role in restricting the rotation of the threaded suspension rod 19. During the upward movement of the threaded suspension rod 19, it will drive the refractory brick 3 installed on the bottom surface through the hanging plate 16 to move upward synchronously until the refractory brick 3 is moved to a suitable height. After the refractory brick 3 cools down, the second nut 18 is unscrewed from the threaded short rod 14. When the threaded short rod 14 is moved out of the installation hole 17 opened on the top surface of the hanging plate 16 when the refractory brick 3 is moved downward, the eroded refractory brick 3 can be disassembled. Then, a new refractory brick 3 is reinstalled on the bottom surface of the hanging plate 16. After the threaded short rod 14 on the top surface of the refractory brick 3 passes through the installation hole 17, the second nut 18 is screwed onto the threaded short rod 14 until it cannot be rotated further, and the refractory brick 3 can be installed and fixed on the bottom surface of the hanging plate 16. After the refractory brick 3 is preheated, the knob 25 is rotated in the reverse direction to make the threaded suspension rod 19 push the hanging plate 16 downward, so that the refractory brick 3 moves downward and is inserted into the installation position. To ensure that the refractory brick 3 is closely fitted with the refractory bricks 3 on both sides of the installation position, the position of the threaded suspension rod 19 can be moved left and right or back and forth to adjust the actual position of the refractory brick 3. When the threaded suspension rod 19 is moved, the adjusting cylinder 21 will be within the cross-shaped slot hole 13 opened on the top surface of the arc-shaped top beam 6. And because the limiting rings 22 are respectively installed on the outer walls of the upper and lower ends of the adjusting cylinder 21, the adjusting cylinder 21 can be prevented from moving out of the cross-shaped slot hole 13 under the restriction of the limiting rings 22, and the stability of the adjusting cylinder 21 during movement within the cross-shaped slot hole 13 can be ensured. The limiting rings 22 are in close contact with the arc-shaped surface of the arc-shaped top beam 6, so that the eroded refractory brick 3 can be replaced online. The operation is simple and easy, and the operation space is large. The online replacement of the eroded refractory brick 3 on the wall can be realized. Among them, since the arc-shaped top beam 6 and the connecting mechanism 4 are both exposed to the air, they can be naturally cooled by the air, reducing the power consumption of the fan, and the usage state during the use process can be clearly observed, improving the overall safety.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A front wall structure that can be replaced in a hot state, comprising a pool bottom (1) and a pool wall (2), characterized in that: On both sides of the outer wall of the pool wall (2), side columns (5) are fixedly connected respectively, and an arc-shaped top beam (6) is fixedly connected between the side columns (5). A set of symmetric diagonal tension rods (9) are also fixedly connected between the side columns (5) and the arc-shaped top beam (6) through bolts (11) and first nuts (12). A number of connecting mechanisms (4) are arranged on the arc-shaped top beam (6). The connecting mechanism (4) includes an adjusting cylinder (21), a threaded hanging rod (19), and a knob (25). The adjusting cylinder (21) is movably connected in the top surface of the arc-shaped top beam (6) through limit rings (22) at the upper and lower ends. The knob (25) is movably connected to the top end of the adjusting cylinder (21) through a rotating rod (26) at the bottom end. The threaded hanging rod (19) is movably connected to a threaded hole (28) opened at the bottom end of the rotating rod (26) and passes through the knob (25). The bottom surface of a hanging plate (16) at the bottom end of the threaded hanging rod (19) is also fixedly connected with a refractory brick (3) through a second nut (18).

2. The front wall structure capable of being replaced in hot state according to claim 1, wherein: There are three groups of side columns (5) that are symmetric left and right, and the three groups of side columns (5) gradually become shorter from back to front. The side columns (5) are also fixedly installed on the outer side wall of the pool wall (2), and an arc-shaped top beam (6) is fixedly installed between the symmetric side columns (5) on the left and right.

3. The front wall structure capable of being replaced in hot state according to claim 2, wherein: Concave plates (7) are fixedly installed on both sides of the top surface of the arc-shaped top beam (6) and at the top ends of the inner side walls of the side columns (5) respectively. Connecting holes (8) are opened on both sides of the inner wall of the concave opening of the concave plate (7). Connecting cylinders (10) are fixedly installed at both ends of the diagonal tension rod (9), and the connecting cylinder (10) is located in the concave opening of the concave plate (7). The bolt (11) is inserted and installed in the connecting hole (8) and passes through the connecting cylinder (10), and the first nut (12) is threadedly connected with the bolt (11).

4. The front wall structure capable of being replaced in hot state according to claim 3, characterized in that: A number of cross-shaped slot holes (13) are also opened on the top surface of the arc-shaped top beam (6).

5. The front wall structure capable of being replaced in hot state according to claim 4, wherein: The adjusting cylinder (21) is inserted and installed in the cross-shaped slot hole (13), and limit rings (22) that are in close contact with the arc-shaped surface of the arc-shaped top beam (6) are fixedly installed at the upper and lower ends of the outer wall of the adjusting cylinder (21). An annular limit groove (23) is opened above the inner wall of the adjusting cylinder (21), and a set of symmetric guide bars (24) are fixedly installed below the inner wall of the adjusting cylinder (21).

6. The front wall structure capable of being replaced in hot state according to claim 5, wherein: A rotating rod (26) is fixedly installed on the bottom surface of the knob (25), and the rotating rod (26) is movably installed in the adjusting cylinder (21). A rotating ring (27) is fixedly installed on the outer wall of the rotating rod (26), and the rotating ring (27) is movably installed in the annular limit groove (23). A threaded hole (28) that penetrates the knob (25) is also opened at the bottom end of the rotating rod (26).

7. The front wall structure capable of being replaced in hot state according to claim 6, characterized in that: The threaded hanging rod (19) is threadedly connected with the threaded hole (28), and a guide groove (20) corresponding to the guide bar (24) is opened on the outer wall of the threaded hanging rod (19). A hanging plate (16) is fixedly installed at the bottom end of the threaded hanging rod (19), and a set of symmetric mounting holes (17) are opened on the top surface of the hanging plate (16).

8. The front wall structure capable of being replaced in hot state according to claim 7, characterized in that: As described above. A set of left and right symmetric threaded short rods (14) are fixedly installed on the top surface of the refractory brick (3), and the threaded short rods (14) are inserted into the mounting holes (17). The second nut (18) is threadedly connected to the threaded short rods (14). A caulking brick (15) is also fixedly installed on one side of the top surface of the refractory brick (3), and the refractory brick (3) has a staggered joint structure.

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