Low thermal conductivity corundum mullite composite bricks

Abstract

This utility model discloses a low thermal conductivity corundum-mullite composite brick, relating to the technical field of corundum-mullite composite bricks. It includes a lightweight brick body with a first bonding surface on both sides, and two heavy brick bodies symmetrically arranged on both sides of the lightweight brick body. This utility model enhances the thermal insulation effect through a multi-layered structural design: a hollow cavity in the middle of the lightweight brick body forms cavity one, and an alignment groove forms cavity two when adjacent lightweight brick bodies are assembled. This double-cavity structure effectively reduces heat conduction and allows the lightweight and heavy brick bodies to be pressed together via wavy, toothed, or uneven bonding surfaces, eliminating the need for bolts or other additional fasteners and reducing processing steps. The first protrusion and first mounting groove, and the second protrusion and second mounting groove in the protective assembly are all integral structures of the brick body, avoiding additional assembly steps. The overall process is simpler, reducing processing costs and making it suitable for mass production.

Description

Technical Field

[0001] This utility model relates to the technical field of corundum-mullite composite bricks, specifically a low thermal conductivity corundum-mullite composite brick. Background Technology

[0002] Corundum mullite refractories have been widely used in many industries as a replacement for corundum refractories due to their excellent properties such as high temperature resistance, corrosion resistance, high wear resistance, and thermal shock resistance. However, since the high temperature performance, bulk density, strength, and thermal conductivity of refractory materials are directly proportional, that is, the higher the bulk density and strength of the refractory material, the higher the thermal conductivity, corundum mullite bricks, while possessing good high temperature performance and high thermal shock stability, also have functional defects such as high density, high thermal conductivity, and high thermal expansion coefficient.

[0003] Chinese patent CN21448840U discloses a corundum-mullite-silicon carbide composite brick. This brick is designed with an arc-shaped cross-section, with multiple arc-shaped bricks forming a ring shape, allowing it to fit snugly against the inner wall of a rotary kiln, resulting in a stable structure. Specifically, this invention includes a first connecting block and a second connecting block. The first connecting block has a limiting protrusion, and the second connecting block has a limiting groove. During bricklaying, the limiting protrusion on the right-hand brick is inserted into the limiting groove on the left-hand brick, achieving prefabricated installation and making the connection between bricks more secure. Even if the bricks are impacted or compressed by burning materials, the interaction between the first and second connecting blocks disperses the force to adjacent bricks, preventing brick displacement and collapse. Furthermore, this invention further improves insulation performance and reduces heat loss by fixing an insulation board to the outer arc surface, making it practical.

[0004] The above solutions use bolts and other structures to connect the insulation board to the brick body, thereby improving the brick's own thermal insulation performance. However, fixing the insulation board with bolts involves a complex and costly manufacturing process, making it unsuitable for mass production. Therefore, we offer a low thermal conductivity corundum-mullite composite brick to address these issues. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a low thermal conductivity corundum-mullite composite brick.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low thermal conductivity corundum-mullite composite brick, comprising: a lightweight brick body, wherein both sides of the lightweight brick body are provided with a first bonding surface.

[0007] Two heavy bricks are symmetrically arranged on both sides of a light brick. Each of the two heavy bricks has a second bonding surface, and the heavy bricks are pressed onto the light brick through the first bonding surface and the second bonding surface.

[0008] Protective components are respectively disposed on lightweight bricks and heavy bricks to form at least two protective layers for longitudinally stacked lightweight and heavy bricks.

[0009] Furthermore, a hollow cavity is formed in the middle of the lightweight brick body.

[0010] Furthermore, alignment grooves are provided on both sides of the lightweight brick body.

[0011] Furthermore, the protective component includes a first protrusion and a first mounting groove. The first protrusion and the lightweight brick body are an integral structure. The first mounting groove is opened on the bottom surface of the first protrusion, and the first protrusion matches the first mounting groove.

[0012] Furthermore, the protective component also includes a second protrusion and a second mounting groove. The second protrusion is an integral structure with the heavy brick body, and the second mounting groove is opened on the bottom surface of the heavy brick body and matches the second protrusion.

[0013] Furthermore, the first protrusion and the second protrusion form an installation space at the top of the connection between the lightweight brick and the heavy brick, and the second installation groove forms an installation component at the bottom of the connection between the lightweight brick and the heavy brick, and the installation component matches the installation space.

[0014] Furthermore, an infrared shielding layer is provided on the side of the heavy brick away from the light brick.

[0015] Compared with existing technologies, this low thermal conductivity corundum-mullite composite brick has the following advantages:

[0016] I. This utility model enhances the heat insulation effect through multiple structural designs: the hollow cavity in the middle of the lightweight brick body forms cavity one, and the alignment groove when adjacent lightweight brick bodies are assembled forms cavity two. The double cavity structure can effectively reduce heat conduction, and also allows the lightweight brick body and the heavy brick body to be pressed together by the corrugated, toothed or concave-convex mating surfaces, without the need for bolts or other additional fasteners, reducing processing steps. The first protrusion and the first mounting groove, and the second protrusion and the second mounting groove in the protective component are all integral brick structures, avoiding additional assembly steps, making the overall process simpler, reducing processing costs, and suitable for mass production.

[0017] II. When stacked vertically, the first protrusion of the lightweight brick is inserted into the first mounting groove of the adjacent brick, and the second protrusion of the heavy brick is inserted into the second mounting groove of the adjacent brick, forming at least two protective layers. The alignment grooves of the adjacent bricks are precisely connected. With the matching design of the protrusion and the groove, the bricks are accurately positioned during assembly, reducing the risk of movement and misalignment. The matching structure of the installation space and the installation components further enhances the overall stability after stacking, ensuring that the force can be effectively dispersed when the bricks are subjected to collision or compression, avoiding collapse and improving the reliability of long-term use. Attached Figure Description

[0018] Figure 1 This is one of the perspective views of this utility model;

[0019] Figure 2 This is a second perspective view of the present invention;

[0020] Figure 3 This is a structural schematic diagram of the present invention in its assembled state.

[0021] In the figure: 1. Lightweight brick body; 2. Hollow cavity; 3. Alignment groove; 4. First protrusion; 5. First mounting groove; 6. First mating surface; 7. Heavy brick body; 8. Second mating surface; 9. Second protrusion; 10. Second mounting groove; 11. Infrared shielding layer. Detailed Implementation

[0022] 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.

[0023] like Figure 1-3 As shown, this utility model provides a technical solution: a low thermal conductivity corundum-mullite composite brick, comprising a lightweight brick body 1, two heavy brick bodies 7, and a protective component.

[0024] A hollow cavity 2 is provided in the middle of the lightweight brick body 1. The hollow cavity 2 forms a cavity 1 inside the lightweight brick body 1, which reduces heat conduction and thus achieves the effect of heat insulation.

[0025] Both sides of the lightweight brick 1 are provided with alignment grooves 3. When adjacent lightweight bricks 1 are assembled, the alignment grooves 3 on the adjacent lightweight bricks 1 are aligned and form a cavity 2. The cavity 2 is used to reduce heat conduction, thereby achieving the effect of heat insulation. In addition, the hollow cavity 2 and the alignment grooves 3 also have the effect of reducing the weight of the lightweight brick 1 itself.

[0026] In this embodiment, the lightweight brick body 1 is composed of mullite aggregate, clay and calcined alumina. The lightweight brick body 1 is a lightweight layer with low thermal conductivity and heat insulation properties. The heavy brick body 7 is composed of high-alumina bauxite, corundum powder, mullite and clay. The heavy brick body 7 is a heavy layer with wear resistance and other properties.

[0027] Both sides of the lightweight brick 1 are provided with a first bonding surface 6. Two heavy bricks 7 are symmetrically arranged on both sides of the lightweight brick 1. Both heavy bricks 7 are provided with a second bonding surface 8. The heavy bricks 7 are pressed onto the lightweight brick 1 through the first bonding surface 6 and the second bonding surface 8. The first bonding surface 6 and the second bonding surface 8 can be any one of wavy, toothed, or concave-convex shapes. Before firing the brick, the first bonding surface 6 on the lightweight brick 1 and the second bonding surface 8 on the heavy brick 7 are bonded together and pressed with a pressing machine. After pressing, hollow cavities 2 and alignment grooves 3 are opened on the brick.

[0028] The protective components are respectively disposed on the lightweight brick body 1 and the heavy brick body 7, and are used to form at least two protective layers on the longitudinally stacked lightweight brick body 1 and heavy brick body 7.

[0029] The protective component includes a first protrusion 4 and a first mounting groove 5. The first protrusion 4 and the lightweight brick 1 are an integral structure. The first mounting groove 5 is opened on the bottom surface of the first protrusion 4 and the first protrusion 4 matches the first mounting groove 5. When the lightweight bricks 1 are stacked vertically, the first protrusion 4 is inserted into the first mounting groove 5 to form a protective layer.

[0030] The protective component also includes a second protrusion 9 and a second mounting groove 10. The second protrusion 9 and the heavy brick body 7 are an integral structure. The second mounting groove 10 is opened on the bottom surface of the heavy brick body 7 and matches the second protrusion 9. When the heavy brick bodies 7 are stacked longitudinally, the second protrusion 9 is inserted into the second mounting groove 10 to form a protective layer.

[0031] Protective components can be installed at both ends of the lightweight brick body 1 and on both heavy brick bodies 7, thereby forming multiple protective layers when the brick bodies are stacked longitudinally, ensuring the airtightness of the brick bodies during stacking.

[0032] Specifically, the first protrusion 4 and the second protrusion 9 form an installation space at the top of the connection between the lightweight brick 1 and the heavy brick 7, and the second installation groove 10 forms an installation component at the bottom of the connection between the lightweight brick 1 and the heavy brick 7. The installation component matches the installation space, and the brick is installed by using a groove assembly method, which results in strong structural stability.

[0033] An infrared shielding layer 11 is provided on the side of the heavy brick body 7 away from the light brick body 1. The infrared shielding layer 11 is made of carbon black or graphite. The infrared shielding layer 11 forms a layer on the heavy brick body 7 that absorbs infrared radiation, thus ensuring its heat preservation effect.

[0034] It should be noted that in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "fixed," "installed," "connected," and "linked" should be interpreted broadly. For example, "installed" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a mechanical connection or an electrical connection; "linked" can be a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low thermal conductive corundum-mullite composite brick, characterized by, include: Lightweight brick body (1), both sides of the lightweight brick body (1) are provided with a first bonding surface (6); Two heavy bricks (7) are symmetrically arranged on both sides of a light brick (1). Each of the two heavy bricks (7) is provided with a second bonding surface (8), and the heavy bricks (7) are pressed onto the light brick (1) through the first bonding surface (6) and the second bonding surface (8). The protective components are respectively disposed on the lightweight brick body (1) and the heavy brick body (7) to form at least two protective layers on the longitudinally stacked lightweight brick body (1) and heavy brick body (7).

2. The low thermal conductivity corundum-mullite composite brick according to claim 1, characterized in that: The lightweight brick (1) has a hollow cavity (2) in the middle.

3. The low thermal conductivity corundum-mullite composite brick according to claim 1, characterized in that: Alignment grooves (3) are provided on both sides of the lightweight brick body (1).

4. The low thermal conductivity corundum-mullite composite brick according to claim 1, characterized in that: The protective component includes a first protrusion (4) and a first mounting groove (5). The first protrusion (4) and the lightweight brick body (1) are an integral structure. The first mounting groove (5) is opened on the bottom surface of the first protrusion (4) and the first protrusion (4) matches the first mounting groove (5).

5. The low thermal conductivity corundum-mullite composite brick according to claim 4, characterized in that: The protective component also includes a second protrusion (9) and a second mounting groove (10). The second protrusion (9) and the heavy brick body (7) are an integral structure. The second mounting groove (10) is opened on the bottom surface of the heavy brick body (7) and matches the second protrusion (9).

6. The low thermal conductivity corundum-mullite composite brick according to claim 5, characterized in that: The first protrusion (4) and the second protrusion (9) form an installation space at the top of the connection between the lightweight brick (1) and the heavy brick (7), and the second installation groove (10) and the second installation groove (10) form an installation component at the bottom of the connection between the lightweight brick (1) and the heavy brick (7), and the installation component matches the installation space.

7. The low thermal conductivity corundum-mullite composite brick according to claim 1, characterized in that: The heavy brick (7) has an infrared shielding layer (11) on the side away from the light brick (1).

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