Refractory mullite brick convenient to assemble
The refractory mullite bricks with polyhedral structure and interlocking design solve the problems of difficult assembly and poor stability of traditional refractory bricks, realize tight connection and efficient assembly between bricks, extend service life and improve the operating performance of hot air ducts.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YIXING TUOBANG REFRACTORY TECH CO LTD
- Filing Date
- 2025-03-28
- Publication Date
- 2026-05-19
AI Technical Summary
Traditional refractory bricks rely on mortar splicing, which increases the difficulty of assembly, reduces structural strength and stability, and makes hot air ducts prone to leakage and require frequent maintenance.
The refractory mullite bricks with a multi-faceted structure achieve tight splicing and stable connection between bricks through the interlocking design of trapezoidal protrusions and grooves, and protrusions and grooves, combined with a refractory flexible coating and a sealant layer.
It improves the connection stability and sealing of the brick body, reduces assembly difficulty and maintenance costs, extends service life, and improves the thermal efficiency and reliability of hot air ducts.
Smart Images
Figure CN224262202U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mullite brick technology, specifically relating to a refractory mullite brick that is easy to assemble. Background Technology
[0002] In high-temperature industrial processes, such as those in the steel, cement, glass, and non-ferrous metals industries, hot air ducts are crucial equipment. They are used to transport hot air into the furnace to improve combustion efficiency and thermal energy utilization. To withstand the thermal stress and mechanical loads of high-temperature environments, hot air ducts are typically constructed using refractory materials. In these applications, refractory bricks are the primary material for constructing hot air ducts, requiring excellent thermal shock resistance, mechanical strength, and high-temperature resistance.
[0003] Existing refractory brick technologies mainly include ordinary refractory bricks, phosphate bricks, and mullite bricks. Among these technologies, mullite bricks are widely used due to their excellent high-temperature resistance and chemical stability. However, traditional mullite bricks have some limitations in design and assembly: traditional refractory bricks are usually joined using mortar, which not only increases the difficulty of assembly but may also lead to a decrease in the overall structural strength and stability due to the poor high-temperature resistance of the mortar. Insufficiently tight joints between bricks may cause hot gas leakage within the hot air ducts, reducing thermal efficiency. Under rapid temperature changes, traditional refractory bricks may crack due to thermal stress, affecting the long-term operation of the hot air ducts.
[0004] Due to the aforementioned issues, traditional refractory bricks may require more frequent maintenance and replacement, increasing operating costs. Therefore, we propose an easily assembled refractory mullite brick that overcomes the shortcomings of existing technologies through its unique design, such as an interlocking structure, providing higher connection stability, sealing, and thermal shock resistance, while simplifying the assembly process and reducing maintenance costs. Utility Model Content
[0005] The present invention aims to solve the technical problem that traditional refractory bricks in the prior art are usually joined by mortar, which not only increases the difficulty of assembly, but may also lead to a decrease in the strength and stability of the overall structure due to the poor high-temperature resistance of the mortar.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a refractory mullite brick that is easy to assemble, comprising a brick body, the brick body having a polyhedral structure, trapezoidal protrusions and trapezoidal grooves matching the shape of the trapezoidal protrusions being provided on the left and right sides of the brick body respectively, and a boss A and a groove A matching the shape of the boss A being provided at the bottom of the left and right sides of the brick body respectively; when the brick body is assembled on a hot air duct in a circular splicing manner, the trapezoidal protrusions and trapezoidal grooves are spliced together, and the boss A and groove A are spliced together to form an interlocking structure;
[0007] The front and rear sides of the brick are respectively provided with protrusions B and C. The front and rear sides of the brick are also respectively provided with grooves C located above protrusion B and matching the shape of protrusion C, and grooves B located below protrusion C and matching the shape of protrusion B. When the brick is assembled in a front-to-back splicing manner, protrusion B is inserted into groove B and protrusion C is inserted into groove C, and protrusion C overlaps on top of protrusion B.
[0008] The design of refractory mullite bricks employs a polyhedral structure, achieving interlocking between bricks through a special convex-concave fit. The trapezoidal protrusions and grooves on the left and right sides, the boss A and groove A at the bottom, and the bosses B and C and grooves B and C on the front and back sides together constitute a precisely mating assembly system. When bricks are joined circumferentially or front-to-back, these convex-concave structures can interlock tightly, forming a stable overall structure.
[0009] Preferably, the trapezoidal protrusions and grooves are located at one-third of the brick's thickness. This helps improve the structural strength of the brick and reduce stress concentration.
[0010] Preferably, the thickness of the boss B and the groove B is one-third of the total thickness of the brick. This helps maintain the overall stability of the brick while allowing for some thermal expansion, reducing damage caused by thermal stress.
[0011] Preferably, the thickness of the boss C and the groove C is two-thirds of the total thickness of the brick. This provides stronger structural support and ensures the stability of the brick in high-temperature environments.
[0012] Preferably, the contact surfaces of bosses B and C, the contact surfaces of the trapezoidal ridge and the trapezoidal groove, and the contact surfaces of boss A and groove A are respectively coated with a fire-resistant flexible coating to mitigate thermal deformation, or a fire-resistant sealant layer that expands and fills gaps at high temperatures to prevent gas leakage. This helps to mitigate thermal deformation at high temperatures, prevent gas leakage, and thus maintain the sealing performance and efficiency of the hot air duct.
[0013] Preferably, the brick has a positioning hole A extending from the top of boss C, and a positioning hole B extending from the top of boss B towards the inside of boss B. When the bricks are spliced together, adjacent bricks are longitudinally spliced and fixed by inserting positioning pins into positioning holes A and B. This improves the splicing accuracy of the bricks and the stability of the overall structure, ensuring the long-term reliable operation of the hot air duct.
[0014] Preferably, both positioning holes A and B are tapered holes, and the positioning pins are made of ceramic fiber material that is resistant to high-temperature expansion. The tapered hole design allows the positioning pins to expand at high temperatures, and the ceramic fiber positioning pins have good high-temperature resistance and thermal shock resistance, which helps maintain the integrity of the structure.
[0015] Preferably, the brick body has a pre-embedded metal reinforcing mesh to improve its thermal shock resistance. This can significantly improve the brick's thermal shock resistance and mechanical strength, and extend its service life.
[0016] Compared with the prior art, the technical effects and advantages of this utility model are:
[0017] This easily assembled refractory mullite brick achieves tight splicing between bricks through its unique polyhedral structure and interlocking design. The interlocking structure of the trapezoidal protrusions and grooves on the left and right sides, the boss A and groove A at the bottom, and the bosses B and C and grooves B and groove C on the front and back sides together form a stable whole, ensuring the stability and sealing of the brick in the hot air duct.
[0018] The embedded metal reinforcing mesh within the brick significantly enhances its thermal shock resistance and mechanical strength, enabling it to withstand high temperatures and mechanical loads, thereby extending its service life and reducing maintenance frequency. Furthermore, the special fire-resistant flexible coating and sealant layer mitigate thermal deformation and prevent gas leakage, further improving the thermal efficiency and reliability of the hot air duct.
[0019] The precise alignment and longitudinal splicing design of the bricks, through the application of positioning holes and pins, ensures accurate assembly, simplifies the installation process, and reduces costs. This design not only improves the overall stability of the bricks but also optimizes the operating performance of the hot air duct, enabling it to operate stably for extended periods in high-temperature environments. Attached Figure Description
[0020] Figure 1 This is a first-view view of the brick body of this utility model;
[0021] Figure 2 This is a second-view view of the brick body of this utility model;
[0022] Figure 3 This is a schematic diagram of the structure of two adjacent bricks spliced together according to this utility model;
[0023] Figure 4 This is a first-view view of the splicing of the two bricks in front and behind this utility model;
[0024] Figure 5 This is a second-view view of the splicing of the two bricks in front and behind this utility model;
[0025] Figure 6 This is an exploded view of the front and rear bricks of this utility model;
[0026] Figure 7 This is a first-view view of the bricks assembled into a pipe according to this utility model.
[0027] Figure 8This is a second-view view of the bricks assembled into a pipe according to this utility model.
[0028] In the diagram: 100, brick body; 11, trapezoidal protrusion; 12, trapezoidal groove; 13, boss A; 14, groove A; 15, boss B; 16, boss C; 17, groove C; 18, groove B; 19, positioning hole A; 110, positioning hole B; 200, positioning pin. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] The following combination Figures 1 to 8 This application will be described in further detail.
[0031] This application discloses an easily assembled refractory mullite brick, comprising a brick body 100, with a metal reinforcing mesh embedded inside the brick body 100 to improve thermal shock resistance. The metal reinforcing mesh enhances the thermal shock resistance of the brick body 100, making it less prone to cracking when exposed to rapid temperature changes. The presence of the metal reinforcing mesh increases the mechanical strength of the brick body 100, enabling it to withstand greater pressure and mechanical loads. By enhancing the overall performance of the brick body 100, the metal reinforcing mesh helps extend its service life and reduces the frequency of maintenance and replacement.
[0032] The brick body 100 has a polyhedral structure. The left and right sides of the brick body 100 are respectively provided with trapezoidal protrusions 11 and trapezoidal grooves 12 that match the shape of the trapezoidal protrusions 11. The bottom of the left and right sides of the brick body 100 is respectively provided with bosses A13 and grooves A14 that match the shape of bosses A13. When the brick body 100 is assembled on the hot air duct in a circular splice, the trapezoidal protrusions 11 and trapezoidal grooves 12 are spliced together, and the bosses A13 and grooves A14 are spliced together to form an interlocking structure.
[0033] The trapezoidal protrusion 11 and trapezoidal groove 12 are located at one-third of the thickness of the brick body 100. This optimizes the mechanical properties of the brick body 100, allowing the force to be distributed more evenly across the entire brick body 100 when subjected to external pressure. The design of the trapezoidal protrusion 11 and groove increases the friction and interlocking force between the brick bodies 100, making the brick body 100 more secure in the hot air duct and less prone to displacement due to thermal expansion or mechanical vibration. Due to the thermal expansion effect, the brick body 100 will expand at high temperatures. Placing the protrusion and groove at one-third of the thickness of the brick body 100 allows for a more uniform distribution of stress generated during thermal expansion, reducing damage caused by concentrated thermal stress.
[0034] The front and rear sides of the brick body 100 are respectively provided with a boss B15 and a boss C16. The front and rear sides of the brick body 100 are also respectively provided with a groove C17 located above the boss B15 and matching the shape of the boss C16, and a groove B18 located below the boss C16 and matching the shape of the boss B15. When the brick body 100 is assembled in a front-to-back splicing manner, the boss B15 is inserted into the groove B18 and the boss C16 is inserted into the groove C17, and the boss C16 overlaps the top of the boss B15.
[0035] The thickness of the boss B15 and the groove B18 is one-third of the total thickness of the brick body 100. The thinner design of the boss B15 and groove B18 provides greater flexibility, allowing the brick body 100 some room to move during thermal expansion, thereby reducing structural damage caused by thermal stress. Reducing the thickness of the boss B15 and groove B18 helps to reduce the overall weight of the brick body 100, lessen the burden on the hot air ducts, and improve the overall reliability of the system. Reducing the amount of material used can lower production costs without affecting the overall performance of the brick body 100.
[0036] The thickness of the boss C16 and the groove C17 is two-thirds of the total thickness of the brick body 100. The thicker boss C16 and groove C17 design provides stronger structural support, ensuring the stability of the brick body 100 under high-temperature environments, especially for sections subjected to greater pressure. The thicker boss C16 and groove C17 can better resist thermal deformation caused by high temperatures, maintaining the shape and dimensional stability of the hot air duct. The increased thickness of the boss C16 and groove C17 improves the durability of the brick body 100, extends its service life, and reduces replacement frequency and maintenance costs.
[0037] The contact surfaces of bosses B15 and C16, the contact surfaces of trapezoidal ridge 11 and trapezoidal groove 12, and the contact surfaces of boss A13 and groove A14 are respectively coated with a fire-resistant flexible coating to mitigate thermal deformation, or a fire-resistant sealant layer that expands at high temperatures to fill gaps and prevent gas leakage. The fire-resistant flexible coating absorbs and mitigates thermal stress caused by temperature changes, reduces the impact of thermal expansion on the brick 100 structure, and prevents cracks in the brick 100 due to thermal shock. The fire-resistant sealant layer expands at high temperatures to fill gaps between bricks 100, ensuring the airtightness of hot air ducts and preventing heat loss and leakage of harmful gases. The coating and sealant layer protect the surface of the brick 100 from direct damage by high temperatures and corrosive gases, thereby improving the durability and service life of the brick 100.
[0038] A positioning hole A19 is provided through the top of the boss C16 in brick body 100, and a positioning hole B110 is provided from the top of the boss B15 towards the inside of the boss B15. When brick bodies 100 are spliced together, adjacent brick bodies 100 are longitudinally spliced and fixed by inserting positioning pins 200 into positioning holes A19 and B110. The design of positioning holes A19 and B110, along with the positioning pins 200, allows for precise alignment between brick bodies 100, ensuring accurate assembly of brick bodies 100 in the hot air duct. The positioning pins 200, inserted into the positioning holes, provide longitudinal splicing fixation for the brick bodies 100, enhancing the overall stability of the brick body 100 structure.
[0039] Both positioning holes A19 and B110 are tapered holes, and the positioning pin 200 is made of ceramic fiber material adapted to high-temperature expansion. The ceramic fiber positioning pin 200 can withstand thermal expansion at high temperatures, maintaining structural stability and ensuring its function is not affected by thermal expansion. The tapered hole design allows for a tighter fit between the positioning pin 200 and the hole, reducing relative movement and thermal stress caused by thermal expansion.
[0040] The design principle of this easily assembled refractory mullite brick is to achieve tight splicing and assembly between bricks 100 through matching geometric shapes and interlocking structures. Specifically, the trapezoidal protrusions 11 and trapezoidal grooves 12 on the left and right sides interlock, with trapezoidal protrusions 11 and matching trapezoidal grooves 12 on the left and right sides of the brick 100, respectively. When the bricks 100 are assembled onto the hot air duct along the circumferential direction, the trapezoidal protrusion 11 of one brick 100 will insert into the trapezoidal groove 12 of the adjacent brick 100, forming an interlocking connection in the left and right directions, such as... Figure 3 As shown,
[0041] The interlocking of the bottom protrusions A13 and grooves A14 on the left and right sides: The bottom of the left and right sides of the brick 100 has protrusions A13, and corresponding grooves A14 of matching shape are provided at the corresponding positions of adjacent bricks 100. This design ensures that, in addition to the connection between the trapezoidal protrusions 11 and the grooves in the left and right directions, the brick 100 is also connected by the bottom protrusions A13 and grooves A14, further enhancing the stability of the overall structure. Figure 3 As shown.
[0042] The front and rear side protrusions B15 and C16, and grooves B18 and C17 are interlocked. The front and rear sides of the brick body 100 are provided with protrusions B15 and C16, and above or below these protrusions are grooves C17 or B18 that match their shape. When the brick bodies 100 are joined front and rear, protrusion B15 inserts into groove B18, protrusion C16 inserts into groove C17, and protrusion C16 overlaps above protrusion B15, forming an interlocking connection in the front-to-back direction. Figure 4 and 5 As shown;
[0043] The interlocking structure described above provides high connection stability, ensuring that the brick 100 will not easily shift or fall off the hot air duct. The assembled brick 100 duct, as... Figure 7 and Figure 8 As shown, the structure maintains its integrity even under high temperatures and mechanical vibration. Due to the tight fit of the bosses and grooves, the joints between the bricks 100 are well sealed, preventing hot gas leakage from the hot air duct and improving thermal efficiency. Thanks to the special design of the interlocking structure, the assembly of the bricks 100 becomes relatively simple and quick, reducing installation costs and time. Mullite is a high-temperature resistant material suitable for high-temperature environments such as hot air ducts, and this brick 100 design can effectively withstand thermal stress under high-temperature conditions. The tight connection between the bricks 100 and the high-temperature resistance of the material itself give this brick 100 structure a long service life, reducing the frequency of maintenance and replacement.
[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A refractory mullite brick that is easy to assemble, comprising a brick body (100), characterized in that, The brick body (100) is a polyhedral structure. The left and right sides of the brick body (100) are respectively provided with trapezoidal protrusions (11) and trapezoidal grooves (12) that match the shape of the trapezoidal protrusions (11). The bottom of the left and right sides of the brick body (100) are respectively provided with bosses A (13) and grooves A (14) that match the shape of bosses A (13). When the brick body (100) is assembled on the hot air pipe in a circular splice, the trapezoidal protrusions (11) and trapezoidal grooves (12) are spliced together, and the bosses A (13) and grooves A (14) are spliced together to form an interlocking structure. The front and rear sides of the brick body (100) are respectively provided with protrusions B (15) and C (16). The front and rear sides of the brick body (100) are also respectively provided with grooves C (17) located above protrusions B (15) and matching the shape of protrusions C (16), and grooves B (18) located below protrusions C (16) and matching the shape of protrusions B (15). When the brick body (100) is assembled in a front-to-back splicing manner, protrusions B (15) are inserted into grooves B (18) and protrusions C (16) are inserted into grooves C (17), and protrusions C (16) overlaps above protrusions B (15).
2. The refractory mullite brick for easy assembly according to claim 1, characterized in that: The trapezoidal protrusion (11) and trapezoidal groove (12) are located at one-third of the thickness of the brick (100).
3. The refractory mullite brick for easy assembly according to claim 1, characterized in that: The thickness of the boss B(15) and the groove B(18) is one-third of the total thickness of the brick body (100).
4. The refractory mullite brick that is easy to assemble according to claim 1, characterized in that: The thickness of the boss C(16) and the groove C(17) is two-thirds of the total thickness of the brick body (100).
5. The refractory mullite brick for easy assembly according to claim 1, characterized in that: The contact surfaces of boss B (15) and boss C (16), the contact surfaces of trapezoidal ridge (11) and trapezoidal groove (12), and the contact surfaces of boss A (13) and groove A (14) are respectively coated with a fire-resistant flexible coating to alleviate thermal deformation, or a fire-resistant sealant layer that expands and fills gaps at high temperatures to prevent gas leakage.
6. The refractory mullite brick for easy assembly according to claim 1, characterized in that: A positioning hole A (19) is provided through the top of the boss C (16) of the brick body (100), and a positioning hole B (110) is provided from the top of the boss B (15) towards the inside of the boss B (15). When the brick bodies (100) are spliced together, the adjacent brick bodies (100) are spliced and fixed longitudinally by inserting positioning pins (200) into the positioning holes A (19) and B (110).
7. The refractory mullite brick for easy assembly according to claim 6, characterized in that: Positioning holes A (19) and B (110) are both tapered holes, and the positioning pin (200) is made of ceramic fiber material that is adapted to high temperature expansion.
8. The refractory mullite brick for easy assembly according to claim 1, characterized in that: The brick body (100) has a metal reinforcing mesh embedded inside to improve its thermal shock resistance.