Connecting structure for mounting refractory bricks on annular metal shell
By using an annular metal shell to connect the refractory bricks with multiple rows of screws distributed in the high-temperature device, and filling the refractory fiber felts between the refractory bricks, the problems of easy cracking, assembly gaps, and bolt components in traditional connecting structures are solved, and the life and economic benefits of refractory bricks are achieved.
Patent Information
- Application Number
- CN202420991579.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-05-09
AI Technical Summary
In high-temperature devices, traditional refractory bricks are prone to cracking and metal shells, too large in size, causing breakage, assembly gaps lead to peeling and damage, and bolt components are susceptible to heat wear and falling off.
The refractory brick is connected to the ring metal shell and the welded multi-row screws. The nut is fixed at a position 6mm from the outer wall of the metal shell. The self-flow castable layer is cast between the refractory brick and the metal shell, and the refractory fiber felt is filled between the refractory bricks for sealing.
It effectively solves the problems of refractory bricks being prone to cracks, assembly gaps, and bolt components being prone to heat wear, improves the life of refractory bricks being installed in annular metal shell, has a small amount of maintenance, is convenient and fast assembly and maintenance, and has significant economic benefits.
Smart Images
Figure CN222651385U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of refractory materials, and in particular relates to a connection structure of an annular metal shell and refractory bricks, which is suitable for connecting a combustion chamber shell of a high-temperature device with a refractory brick outer lining. Background Art
[0002] In the high-temperature device, the combustion chamber is a columnar container, and the combustion-supporting gas enters the bed layer from the central oxygen injection port; the combustion-supporting gas enters from the center from top to bottom, the generated combustion flue gas is discharged from bottom to top, and the material is added from top to bottom; the outer wall of the central gas injection pipe is provided with refractory material to achieve heat insulation and wear resistance. The traditional outer wall refractory bricks are a whole circle of layered outer shells. Due to their large size, they are prone to breakage and failure, and gaps are generated in the assembly with the pipe wall, resulting in peeling and damage; since the traditional fixing scheme adopts a circular countersunk hole design, the upper end face of the nut connecting the bolt group is sealed with refractory mud, which is easy to fall off due to heat wear, causing the bolts to directly contact the heat source, and the bolt assembly to deform, twist and break. Summary of the invention
[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a connection structure for mounting refractory bricks on an annular metal shell.
[0004] The technical solutions adopted by the utility model to achieve the above-mentioned purpose are as follows:
[0005] A connection structure for mounting refractory bricks on an annular metal shell, the connection structure comprising screws welded and distributed on the metal shell, the screws being arranged in multiple rows evenly distributed along the circumference; a nut matching each screw being fixed at a position 6 mm away from the outer wall of the metal shell; a refractory brick being suspended on each screw and nut assembly; a self-flowing castable material layer being cast between the refractory bricks and the metal shell; convex-concave engagement between two adjacent refractory bricks above and below and between two adjacent refractory bricks on the left and right, and a refractory fiber felt for sealing the gap between two refractory bricks being filled in the gap between two adjacent refractory bricks above and below and between two adjacent refractory bricks on the left and right; and a circular positioning protrusion being provided on the refractory brick for point contact with the arc surface of the metal shell.
[0006] The refractory brick is provided with a T-shaped groove extending from the end surface to the middle of the refractory brick, the edges of the T-shaped groove are all rounded, and a connecting bolt assembly is embedded in the T-shaped groove.
[0007] The axial curved surface of the welding screw is wound with anti-expansion refractory fiber wool.
[0008] The utility model proposes a connection structure for installing refractory bricks in an annular metal shell. By adopting the above technical scheme, the problem of easy cracking when the traditional large-ring refractory bricks are installed in a whole circle when the annular metal shell is installed with refractory bricks is solved; the problem of easy breakage of refractory bricks due to oversize; the problem of gap between the metal shell and the refractory bricks. The countersunk installation of bolts and refractory bricks solves the problem of bare bolts and nuts or easy falling off when filled with ceramic slurry; the bolts are prevented from loosening, which effectively prolongs the service life of the refractory bricks installed in the annular metal shell; the maintenance is small, the assembly and maintenance are convenient and fast, and there is a significant economic benefit. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 Layout of the refractory brick connection structure for the combustion chamber shell;
[0010] Figure 2 yes Figure 1 Magnified view of position I.
[0011] Figure 3 This is a hierarchical layout diagram for the assembly.
[0012] In the figure: 1-circular positioning block structure; 2-nut; 3-screw; 4-convex and concave buckle; 5-T-slot; 6-metal shell; 7-self-flowing castable material layer; 8-refractory brick; 9-refractory fiber felt. DETAILED DESCRIPTION
[0013] The utility model is described in detail with reference to the accompanying drawings and specific embodiments:
[0014] like Figure 1 , Figure 2 , Figure 3As shown, a ring-shaped metal shell is installed with a refractory brick connection structure, wherein the screw rods 3 of the bolt assembly are evenly distributed and welded on the metal shell 6; according to the tolerance size of the refractory brick, the nut 2 of the bolt assembly is adjusted and tightened to a position 6mm away from the metal shell 6; the refractory brick 8 is smaller in size and is installed and distributed on the circumferential surface of the ring-shaped metal shell 6. The refractory brick 8 has a T-shaped groove 5 from the end face to the middle of the refractory brick 8, the edges of the T-shaped groove 5 are all rounded, and a connecting bolt assembly is embedded in the T-shaped groove 5; the two adjacent refractory bricks on the left and right, the concave and convex buckles 4 are matched, and a refractory fiber felt 9 should be padded in the gap between them to seal the gap between the two refractory bricks. There is a circular positioning block structure 1 on the refractory brick, and the protrusion is 6mm. After adjusting the position of the nut 2 on the screw 3, it should just be in point contact with the arc surface of the metal shell 6. The installation process is to weld a bolt from the bottom to hang a refractory brick 8. After a circle of masonry is completed, the upward part is masonry. After every three layers, a plastic film is wrapped around the curved surface of the refractory brick to seal it, and then the self-flowing castable 7 is used to grout the 6mm gap. During the grouting process, the end face of the refractory brick is lightly tapped to ensure that the self-flowing castable 7 fills the entire T-slot 5 of the refractory brick 8 and the 6mm gap formed with the metal shell 6.
[0015] The screw rod 2 and the nut 3 are treated with anti-swelling fiber winding, that is, 1.5 mm fire-resistant fiber cotton is wound on the axial curved surface of the screw rod 2 and the nut 3.
[0016] The refractory fiber felt 9 is used to adjust the brick joints between the adjacent refractory bricks 8 to ensure the sealing between the refractory bricks 8 in the horizontal and vertical directions. The self-flowing castable 7 is used for glue pouring and curing.
[0017] The utility model is not only used on the combustion chamber shell of high-temperature industrial devices, but also suitable for various plane walls, circumferential furnace walls and other insulation scales, all of which belong to the protection scope of the present invention.
Claims
1. A connection structure for mounting refractory bricks on an annular metal shell, characterized in that: The connection structure has screws welded and distributed on the metal shell, and the screws are arranged in multiple rows evenly distributed along the circumference; a nut matching each screw is fixed at a position 6 mm away from the outer wall of the metal shell; a refractory brick is suspended on each screw and nut assembly; a self-flowing castable layer is cast between the refractory bricks and the metal shell; the refractory bricks adjacent to each other in the upper and lower parts and the refractory bricks adjacent to each other in the left and right parts are fitted with each other in a convex and concave manner, and the gaps between the refractory bricks adjacent to each other in the upper and lower parts and the refractory bricks adjacent to each other in the left and right parts are filled with refractory fiber felt for sealing the gaps between the two refractory bricks; the refractory bricks are provided with circular positioning protrusions that are in point contact with the arc surface of the metal shell.
2. A connection structure for mounting refractory bricks on an annular metal shell as claimed in claim 1, characterized in that: The refractory brick is provided with a T-shaped groove extending from the end surface to the middle of the refractory brick, the edges of the T-shaped groove are all rounded, and a connecting bolt assembly is embedded in the T-shaped groove.
3. The connection structure of an annular metal shell for mounting refractory bricks according to claim 1, characterized in that: The axial curved surface of the screw is wound with anti-expansion refractory fiber wool.