High-heat-insulation refractory brick with multi-layer composite structure

Abstract

The utility model relates to the technical field of refractory bricks, and discloses a high-heat-insulation refractory brick with a multi-layer composite structure, which comprises a refractory layer, a heat insulation layer arranged below the refractory layer, a reinforcing layer arranged below the heat insulation layer, a heat preservation layer arranged below the reinforcing layer, and a heat insulation component arranged inside the heat insulation layer. The heat insulation assembly comprises a cavity, a nanofiber net is arranged on the inner wall of the cavity, a supporting frame is fixedly connected to the interior of the cavity, and a plurality of honeycomb holes are formed in the supporting frame. The honeycomb structure supporting frame is adopted to provide enhanced supporting force for the heat insulation layer, the aerogel filled in the honeycomb structure supporting frame not only inhibits heat radiation conduction and reduces heat dissipation loss of the furnace body, but also the cobweb radial nanofibers form a bridging structure on the two sides of honeycomb pores, radiation heat transfer is inhibited through nanoscale interface scattering, and the heat dissipation loss of the furnace body is reduced. And the splicing assembly improves the splicing convenience and stability between brick layers through a tenon-and-mortise structure of a tenon tongue and a mortise.

Description

Technical Field

[0001] This utility model relates to the field of refractory brick technology, and in particular to a high heat-insulating refractory brick with a multi-layer composite structure. Background Technology

[0002] Refractory bricks are high-temperature structural materials made from refractory raw materials (such as alumina, silica, magnesia, etc.). They are designed to withstand high-temperature environments above 1200℃ and are widely used in metallurgy, glass, ceramics, chemical, power and other industrial fields. Refractory bricks are the "protective shell" of high-temperature industries, and their performance directly determines the lifespan and efficiency of equipment.

[0003] Traditional refractory bricks, such as clay bricks and high-alumina bricks, mainly rely on the low thermal conductivity of the material itself to achieve heat insulation. However, due to the solid-phase heat conduction mechanism, their thermal conductivity is generally high, making it difficult to meet the extreme heat insulation requirements of high-temperature industries. This results in serious heat loss from the furnace body and high energy consumption. Improving heat insulation performance often requires reducing the material density and increasing porosity, but this significantly weakens thermal shock resistance and mechanical strength. Under high-temperature rapid heating and cooling conditions, cracks and spalling are prone to occur, shortening the service life of the furnace lining. Moreover, traditional insulation layers rely on a single pore insulation mechanism. Under long-term high-temperature radiation or slag erosion, the pore structure is prone to collapse and blockage, leading to a rapid decline in heat insulation performance. This results in frequent furnace shutdowns for maintenance, increasing maintenance costs. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-layer composite structure high-insulation refractory brick.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a multi-layer composite high heat insulation refractory brick, comprising a refractory layer, a heat insulation layer disposed below the refractory layer, a reinforcing layer disposed below the heat insulation layer, a heat preservation layer disposed below the reinforcing layer, and a heat insulation component disposed inside the heat insulation layer;

[0006] The heat insulation component includes a cavity, the inner wall of which is provided with a nanofiber mesh, and a support frame is fixedly connected inside the cavity. The support frame has multiple honeycomb holes inside, and the honeycomb holes are filled with filler.

[0007] As a further description of the above technical solution:

[0008] The filler is made of aerogel, the refractory layer is made of high-purity dense alumina, and the insulation layer is made of mullite.

[0009] As a further description of the above technical solution:

[0010] The reinforcing layer is made of silicon carbide-based composite material, the insulation layer is made of lightweight porous ceramic material, and the support frame is made of alumina material. The support frame is disposed between two nanofiber meshes.

[0011] As a further description of the above technical solution:

[0012] The upper surfaces of the heat insulation layer, the reinforcing layer, and the thermal insulation layer are all provided with splicing components. The splicing components include multiple tenons and grooves, which are respectively opened on the upper surfaces of the heat insulation layer, the reinforcing layer, and the thermal insulation layer.

[0013] As a further description of the above technical solution:

[0014] The lower surface of the tenon groove is provided with multiple recessed holes, and the cross-section of the recessed holes is semi-circular.

[0015] As a further description of the above technical solution:

[0016] Both sides of the inner wall of the tenon groove are provided with anti-slip pads, which are made of mullite fiber.

[0017] As a further description of the above technical solution:

[0018] The lower surfaces of the fire-resistant layer, the heat insulation layer, and the reinforcing layer are all fixedly connected with multiple tenons, and the lower surfaces of the tenons are fixedly connected with multiple elastic balls, which are made of ceramic fiber elastic material.

[0019] This utility model has the following beneficial effects:

[0020] 1. This utility model, through the setting of the heat insulation component, utilizes a support frame composed of a honeycomb structure to enhance the support of the heat insulation layer. The internal aerogel filling helps to suppress heat radiation conduction and simultaneously enhances mechanical strength and reduces heat loss of the furnace body. Furthermore, the honeycomb structure provides a crack deflection path, and combined with the elastic buffering effect of the aerogel, it enhances the service life of the bricks. The spiderweb-like radial nanofibers form a "bridging" structure on both sides of the honeycomb pores, suppressing radiative heat transfer through nanoscale interface scattering, and can form micro-heat-conducting channels under local high temperatures, reducing thermal stress concentration and improving compressive strength.

[0021] 2. This utility model improves the convenience of splicing between different layers of bricks by setting up splicing components. The mortise and tenon joint structure formed by the tenon and mortise helps to enhance the stability and convenience of splicing between different layers, and facilitates positioning and guidance during splicing, reducing the phenomenon of uneven splicing caused by the misalignment of different layers. In addition, the anti-slip performance of the tenon and mortise joint is enhanced by the cooperation of the concave hole and elastic ball, and the use of anti-slip pads further improves the anti-slip performance of splicing, thereby improving the tightness of splicing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the heat insulation layer proposed in this utility model;

[0024] Figure 3 This is a partial structural diagram of the connection point of the filler body proposed in this utility model;

[0025] Figure 4 This is a schematic diagram of the nanofiber mesh structure proposed in this utility model;

[0026] Figure 5 This is a schematic diagram of the support frame structure proposed in this utility model;

[0027] Figure 6 This is a schematic diagram of the honeycomb hole structure proposed in this utility model;

[0028] Figure 7 This is a schematic diagram of the tenon and groove structure proposed in this utility model;

[0029] Figure 8 This is a schematic diagram of the tenon structure proposed in this utility model.

[0030] Legend:

[0031] 1. Fire-resistant layer; 2. Insulation layer; 3. Reinforcing layer; 4. Thermal insulation layer; 5. Cavity; 6. Nanofiber mesh; 7. Support frame; 8. Filler; 9. Mortise and tenon; 10. Recessed hole; 11. Anti-slip pad; 12. Tenon tongue; 13. Elastic ball; 14. Honeycomb hole. Detailed Implementation

[0032] 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.

[0033] As attached Figure 1-8 As shown, one embodiment of this utility model is provided: a multi-layer composite high heat insulation refractory brick, including a refractory layer 1, a heat insulation layer 2 disposed below the refractory layer 1, a reinforcing layer 3 disposed below the heat insulation layer 2, a heat insulation layer 4 disposed below the reinforcing layer 3, a heat insulation component disposed inside the heat insulation layer 2, and the reinforcing layer 3 is used to improve the structural strength of the brick.

[0034] The thermal insulation component includes a cavity 5, the inner wall of which is provided with a nanofiber mesh 6, and a support frame 7 is fixedly connected inside the cavity 5. The support frame 7 has multiple honeycomb holes 14 inside, and the honeycomb holes 14 are filled with fillers 8. The nanofiber mesh 6 is prepared by electrospinning technology to reduce radial thermal conductivity. The support frame 7 facilitates the improvement of the support performance of the cavity 5 inside the thermal insulation layer 2.

[0035] As attached Figure 5 As shown, filler 8 is made of aerogel, which suppresses heat radiation conduction while enhancing mechanical strength.

[0036] As attached Figure 1 As shown, the refractory layer 1 is made of high-purity dense alumina, the heat insulation layer 2 is made of mullite, the reinforcing layer 3 is made of silicon carbide-based composite material, and the thermal insulation layer 4 is made of lightweight porous ceramic material. The silicon carbide-based composite material has excellent thermal shock resistance.

[0037] As attached Figure 3 As shown, the support frame 7 is made of alumina and is placed between two nanofiber meshes 6. The support frame 7 improves the support of the cavity 5, and the alumina material has strong wear resistance and excellent high temperature stability.

[0038] As attached Figure 7 As shown, splicing components are provided on the upper surfaces of the insulation layer 2, the reinforcing layer 3, and the thermal insulation layer 4. The splicing components include multiple tenons 9, which are respectively opened on the upper surfaces of the insulation layer 2, the reinforcing layer 3, and the thermal insulation layer 4. Multiple recesses 10 are opened on the lower surface of the tenons 9. The cross-section of the recesses 10 is semi-circular. Anti-slip pads 11 are provided on both sides of the inner wall of the tenons 9. The anti-slip pads 11 are made of mullite fiber. The tenons 9 are used for the connection of the tenons 12, thereby improving the convenience of installation between the layers and facilitating the positioning guidance during the installation of each layer. The mullite fiber material has high tensile strength and flexibility, and can be bent into felt or fabric, thereby improving the anti-slip performance.

[0039] As attached Figure 8 As shown, multiple tenons 12 are fixedly connected to the lower surfaces of the fire-resistant layer 1, the heat insulation layer 2, and the reinforcing layer 3. Multiple elastic balls 13 are fixedly connected to the lower surfaces of the tenons 12. The elastic balls 13 are made of ceramic fiber elastic material. The tenons 12 are easy to splice with the mortise 9 to form a tenon and mortise structure. The elastic balls 13 are easy to engage with the recessed holes 10, increasing the anti-slip and tightness of the engagement between the tenons 12 and the mortise 9. The material of the tenons 12 fixedly connected to the top of each layer is the same as the material of each layer.

[0040] Working principle: In the application of this utility model, the refractory layer 1 is used to first resist fire and heat insulation, directly contacting the high temperature environment and enduring mechanical wear and chemical corrosion. Then, the heat insulation layer 2 blocks the heat. The core heat insulation unit blocks the heat transfer to the inner layer, while the honeycomb unit is arranged in a regular hexagonal shape, providing a crack deflection path, absorbing thermal stress, and reducing cracking within the layer. The nanofiber mesh 6 is radially distributed on both sides of the honeycomb pores 14, forming a dual function of "heat-conducting network-scattering center". The reinforcing layer 3 enhances the overall structural strength and inhibits the creep of the heat insulation layer 2. The subsequent heat insulation layer 4 further reduces heat loss and reduces ambient temperature fluctuations.

[0041] When splicing between different layers, the tenon 12 connecting each layer is inserted into the mortise 9 between adjacent layers by external force, so that the tenon 12 is fully inserted into the mortise 9. After insertion, the elastic ball 13 will be stuck inside the recess 10, and the anti-slip pad 11 will be tightly attached to one side of the tenon 12, which will enhance the friction of the tenon 12. Then, epoxy resin is used to bond the tenon 12 to the inlet of the mortise 9, thereby completing the connection and splicing of each layer.

[0042] 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 multi-layer composite high-insulation refractory brick, comprising a refractory layer (1), characterized in that: A heat insulation layer (2) is provided below the fire-resistant layer (1), a reinforcing layer (3) is provided below the heat insulation layer (2), a heat insulation layer (4) is provided below the reinforcing layer (3), and a heat insulation component is provided inside the heat insulation layer (2). The heat insulation component includes a cavity (5), the inner wall of which is provided with a nanofiber mesh (6), and a support frame (7) is fixedly connected inside the cavity (5). The support frame (7) has multiple honeycomb holes (14) inside, and the honeycomb holes (14) are filled with fillers (8).

2. The high-insulation refractory brick with a multi-layer composite structure according to claim 1, characterized in that: The filler (8) is made of aerogel, the refractory layer (1) is made of high-purity dense alumina, and the heat insulation layer (2) is made of mullite.

3. The high-insulation refractory brick with a multi-layer composite structure according to claim 1, characterized in that: The reinforcing layer (3) is made of silicon carbide-based composite material, the insulation layer (4) is made of lightweight porous ceramic material, the support frame (7) is made of alumina material, and the support frame (7) is placed between two nanofiber meshes (6).

4. The high-insulation refractory brick with a multi-layer composite structure according to claim 1, characterized in that: The upper surfaces of the heat insulation layer (2), the reinforcing layer (3) and the heat insulation layer (4) are all provided with splicing components. The splicing components include multiple tenons (9), which are respectively opened on the upper surfaces of the heat insulation layer (2), the reinforcing layer (3) and the heat insulation layer (4).

5. The high-insulation refractory brick with a multi-layer composite structure according to claim 4, characterized in that: The lower surface of the tenon (9) is provided with a plurality of recesses (10), and the cross section of the recesses (10) is semi-circular.

6. The high-insulation refractory brick with a multi-layer composite structure according to claim 4, characterized in that: Both sides of the inner wall of the tenon (9) are provided with anti-slip pads (11), which are made of mullite fiber.

7. The high-insulation refractory brick with a multi-layer composite structure according to claim 1, characterized in that: The lower surfaces of the fire-resistant layer (1), the heat insulation layer (2) and the reinforcing layer (3) are all fixedly connected with multiple tenons (12), and the lower surfaces of the tenons (12) are fixedly connected with multiple elastic balls (13), which are made of ceramic fiber elastic material.

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