Air insulated composite brick

Abstract

The utility model relates to firebrick technical field, concretely relates to an air heat insulation combined brick. Including the firebrick unit formed by A type firebrick and B type firebrick, multiple firebrick units are annularly built in the inner wall of rotary kiln, and include multiple arranged firebrick units along the length direction of rotary kiln. Each firebrick unit includes four A type firebricks along the length direction of rotary kiln and one B type firebrick arranged at the end of four A type firebricks, and A type firebrick one end is equipped with recess cavity, and the recess cavity forms air heat insulation chamber between the adjacent two A type firebricks and between the adjacent A type firebrick and B type firebrick. The utility model discloses through air heat insulation chamber optimization, structural mechanics dispersion design and process simplification, realizes the collaborative promotion of heat insulation performance and structural strength.

Description

Technical Field

[0001] This utility model relates to the field of refractory brick technology, specifically to an air-insulating composite brick. Background Technology

[0002] In the field of rotary kiln refractory bricks, traditional designs often employ refractory brick structures with a single square groove. These structures create an air insulation layer by opening square grooves on the brick surface, attempting to reduce heat transfer. However, in practical applications, this type of structure has significant shortcomings in terms of insulation performance, structural strength, and adaptability, making it difficult to meet the demands of modern industry for high efficiency, energy saving, and long service life.

[0003] In specific square groove structures, the right-angled sides are prone to stress concentration under pressure, leading to cracking of the bricks. Especially in the inclined structure of rotary kilns, because the inclined rotary kiln is higher at one end and lower at the other, the refractory bricks at the bottom end need to withstand greater compressive force. The square groove has weak compressive strength, which will significantly reduce the service life of the refractory bricks at the bottom end.

[0004] In the prior art, patent application CN202320780724.7 discloses a low thermal conductivity corundum refractory brick, comprising a cavity inside the refractory brick body, and a connecting groove inside the refractory brick body, the connecting groove being connected to the cavity. This type of refractory brick has many groove-shaped structures that weaken the strength of the cavity, and the connecting groove is arranged around the circumference. When this type of refractory brick is used in an inclined rotary kiln structure, its compressive strength will be significantly reduced, affecting its service life. Furthermore, the processing technology of this type of brick is more complex. Utility Model Content

[0005] This invention provides an air-insulated composite brick to solve the technical problem of poor synergy between the heat insulation performance and structural strength of refractory bricks used in rotary kilns with inclined structures in the prior art.

[0006] To solve the above problems, the present invention provides an air-insulating composite brick with the following technical solution: It includes refractory brick units formed by type A refractory bricks and type B refractory bricks. Multiple refractory brick units are built in a ring on the inner wall of the rotary kiln, and multiple refractory brick units are arranged along the length of the rotary kiln.

[0007] Each refractory brick unit includes four type A refractory bricks arranged along the length of the rotary kiln and one type B refractory brick arranged at the end of the four type A refractory bricks. One end of the type A refractory brick is provided with a groove cavity. There are air insulation chambers formed by the groove cavities between two adjacent type A refractory bricks and between adjacent type A refractory bricks and type B refractory bricks.

[0008] Furthermore, the groove cavity includes a trapezoidal cavity, the bottom of which is open and the length of the bottom of the trapezoidal cavity is greater than the length of the top.

[0009] Furthermore, the height of the trapezoidal cavity is H1, and the length of the type A refractory brick is H2, where H1∶H2=1∶27.

[0010] Furthermore, the top of the trapezoidal cavity is located in a triangular turbulence cavity connected to it.

[0011] Furthermore, the length of the bottom side of the triangular turbulence cavity is L1, and the length of the top side of the trapezoidal cavity is L2, where L1∶L2=1∶4.

[0012] Furthermore, the triangular turbulence cavities on different Type A refractory bricks within the same refractory brick unit are arranged in a staggered manner in the transverse direction.

[0013] Furthermore, the two opposite sides of the triangular turbulence cavity are located on the extension line of the waist of the trapezoidal cavity or are parallel to the waist of the trapezoidal cavity.

[0014] The beneficial effects of the air-insulating composite brick provided by this utility model are: 1. The grooved cavity of the type A refractory brick of this utility model is matched with the type B refractory brick. The grooved cavity includes a trapezoidal cavity and a triangular turbulence cavity, forming a regularly distributed air insulation chamber. The low thermal conductivity of air effectively blocks the heat transfer path and significantly reduces the loss of heat from the inside of the rotary kiln to the outside.

[0015] Among them, the triangular turbulence cavities disrupt the laminar boundary layer of air through staggered arrangement, generating vortices and Turbulence increases the air heat transfer coefficient, further hindering heat transfer.

[0016] 2. The trapezoidal cavity with an open bottom and a length greater than the top in this invention distributes pressure evenly to the side walls and bottom, forming an arch-like mechanical support structure that enhances the compressive strength of the Type A brick. The Type B refractory brick, without a groove to weaken its strength, serves as the end support point of the refractory brick unit, bearing the local pressure transmitted by the Type A brick, forming a periodic reinforcement support to ensure the overall structural stability.

[0017] 3. Overall, this utility model achieves a synergistic improvement in thermal insulation performance and structural strength through optimized air insulation chamber design, dispersed structural mechanics design, and simplified process. Attached Figure Description

[0018] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein: Figure 1 This is a schematic diagram showing the arrangement of two refractory brick units of this utility model; Figure 2 This is a structural schematic diagram of the type A refractory brick in this utility model.

[0019] Explanation of reference numerals in the attached figures: 1. Type A refractory brick; 11. Grooved cavity; 111. Trapezoidal cavity; 112. Triangular turbulence cavity; 2. Type B refractory brick; 3. Refractory brick unit; 4. Air insulation chamber. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] The number of any elements in the accompanying drawings is for illustrative purposes only and not as a limitation, and any naming is for distinction only and has no limiting meaning.

[0022] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0023] An embodiment of an air-insulating composite brick provided by this utility model: like Figures 1 to 2 As shown, It includes refractory brick units 3 formed by type A refractory bricks 1 and type B refractory bricks 2. Multiple refractory brick units 3 are built in a ring on the inner wall of the rotary kiln, and multiple refractory brick units 3 are arranged along the length of the rotary kiln.

[0024] Each refractory brick unit 3 includes four type A refractory bricks 1 arranged along the length of the rotary kiln and one type B refractory brick 2 arranged at the end of the four type A refractory bricks 1. One end of the type A refractory brick 1 is provided with a groove cavity 11. An air insulation chamber 4 formed by the groove cavity 11 is provided between two adjacent type A refractory bricks 1 and between adjacent type A refractory bricks 1 and type B refractory bricks 2.

[0025] By utilizing the low thermal conductivity of air in the air-insulated chamber 4, the heat transfer from the inside of the rotary kiln to the outside is effectively reduced. Compared with traditional refractory brick structures, this air-insulated composite brick significantly reduces heat loss in the rotary kiln, improves energy efficiency, and reduces energy consumption and costs in the production process.

[0026] By regularly arranging type A refractory bricks 1 with grooved cavities 11 and type B refractory bricks 2 with complete structures, the rotary kiln has an inclined structure from one end to the other in its length direction. Since there are no slots on type B refractory bricks 2 that weaken the structural strength, they can play a key supporting and reinforcing role.

[0027] In this embodiment, the groove cavity 11 includes a trapezoidal cavity 111, the bottom of the trapezoidal cavity 111 is open and the bottom length of the trapezoidal cavity 111 is greater than the top length.

[0028] The height of the trapezoidal cavity 111 is H1, and the length of the type A refractory brick 1 is H2, where H1∶H2=1∶27.

[0029] The trapezoidal cavity 111 on the Type A refractory brick 1 is ingeniously designed. Its bottom opening and the fact that the bottom length is greater than the top length allow the pressure on the Type A refractory brick 1 to be evenly distributed to the two side walls and the bottom of the trapezoidal cavity when it is under pressure. This pressure distribution method is similar to an arch structure, which can effectively enhance the compressive strength of the Type A refractory brick 1 itself. In addition, the trapezoidal cavity 111 is easier to achieve through cutting processes than an arch.

[0030] In this embodiment, the top of the trapezoidal cavity 111 is located in the triangular turbulence cavity 112 connected to it.

[0031] The triangular turbulence cavity 112 has a base length of L1 and a top length of L2, where L1∶L2=1∶4.

[0032] Among them, the triangular turbulence cavities 112 on different type A refractory bricks 1 within the same refractory brick unit 3 are arranged in a staggered manner in the transverse direction.

[0033] Along the length of the rotary kiln, the triangular turbulence cavities 112 increase the volume of the air cavity while ensuring structural strength. Furthermore, their staggered arrangement alters the airflow state within the air insulation chamber 4. When air flows through the triangular turbulence cavities 112, eddies and turbulence are generated, disrupting the laminar boundary layer and increasing the heat transfer coefficient, making heat transfer within the air insulation chamber 4 more difficult. Moreover, the laterally staggered arrangement of the triangular turbulence cavities 112 on different Type A refractory bricks 1 within the same refractory brick unit 3 further enhances the air turbulence effect and improves the insulation performance.

[0034] Specifically, the two opposite sides of the triangular turbulence cavity 112 are located on the extension line of the waist of the trapezoidal cavity 111 or are parallel to the waist of the trapezoidal cavity 111.

[0035] The trapezoidal cavity 111 and the triangular turbulence cavity 112 are formed by a cutting process. By setting consistent bevels, the cutting process is made easier.

[0036] In this embodiment, as required, multiple refractory brick units 3, formed by type A refractory bricks 1 and type B refractory bricks 2, are arranged in a ring on the inner wall of the rotary kiln. One hundred refractory brick units 3 are evenly arranged along the length of the rotary kiln to meet the overall insulation and structural requirements of the rotary kiln.

[0037] In each refractory brick unit 3, four type A refractory bricks 1 are arranged in an array along the length of the rotary kiln, and a type B refractory brick 2 is neatly arranged at the end of the four type A refractory bricks 1.

[0038] Among them, air insulation chambers 4 are naturally formed between two adjacent type A refractory bricks 1 and between adjacent type A refractory bricks 1 and type B refractory bricks 2 due to the presence of the groove cavity 11 on the type A refractory brick 1. These air insulation chambers 4 are evenly distributed inside the refractory brick unit 3, effectively preventing the transfer of heat.

[0039] Specifically, the trapezoidal cavity 111 in the groove cavity 11 has a unique design, with an open bottom and a bottom length greater than the top length. Through precise measurement and calculation, the height H1 of the trapezoidal cavity 111 is set to 10mm, and the length H2 of the type A refractory brick 1 is set to 270mm, satisfying the ratio H1∶H2 = 1∶27. The width of the type A refractory brick 1 is 250mm.

[0040] In addition, a triangular turbulence-inducing cavity 112 is provided at the top of the trapezoidal cavity 111 and communicates with it. The length L1 of the base of the triangular turbulence-inducing cavity 112 is 30mm, and the length L2 of the top of the trapezoidal cavity 111 is 120mm, which conforms to the ratio of L1∶L2 = 1∶4. At the same time, the triangular turbulence-inducing cavities 112 on different Type A refractory bricks 1 within the same refractory brick unit 3 are arranged in a staggered manner in the transverse direction, and the two opposite sides of the triangular turbulence-inducing cavity 112 correspond to the extension line of the waist of the trapezoidal cavity 111 or are parallel to the waist of the trapezoidal cavity 111.

[0041] It should be noted that the length and width of type B refractory brick 2 are the same as those of type A refractory brick 1.

[0042] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0043] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. An air-insulating composite brick, characterized in that, Including those formed from type A refractory bricks (1) and type B refractory bricks (2) Refractory brick unit (3), multiple refractory brick units (3) are built in a ring on the inner wall of the rotary kiln, and include multiple arranged refractory brick units (3) along the length of the rotary kiln. Each refractory brick unit (3) includes four type A refractory bricks (1) arranged along the length of the rotary kiln and arranged in... A type B refractory brick (2) is located at the end of four type A refractory bricks (1). One end of the type A refractory brick (1) is provided with a groove cavity (11). The air insulation chamber (4) formed by the groove cavity (11) is included between two adjacent type A refractory bricks (1) and between adjacent type A refractory bricks (1) and type B refractory bricks (2).

2. The air-insulating composite brick according to claim 1, characterized in that, The groove cavity (11) includes a trapezoidal cavity. (111), the bottom of the trapezoidal cavity (111) is open and the bottom length of the trapezoidal cavity (111) is greater than the top length.

3. The air-insulating composite brick according to claim 2, characterized in that, The height of the trapezoidal cavity (111) is H1. The length of the type A refractory brick (1) is H2, where H1∶H2=1∶27.

4. The air-insulating composite brick according to claim 2, characterized in that, The top of the trapezoidal cavity (111) is located at The triangular turbulence cavity (112) connected to it.

5. The air-insulating composite brick according to claim 4, characterized in that, The bottom edge of the triangular turbulence cavity (112) The length is L1, and the top length of the trapezoidal cavity (111) is L2, where L1∶L2=1∶4.

6. The air-insulating composite brick according to claim 5, characterized in that, The same refractory brick unit (3) within the same refractory brick unit (3) The triangular turbulence cavities (112) on the same type A refractory brick (1) are arranged in a staggered manner in the transverse direction.

7. The air-insulating composite brick according to claim 4, characterized in that, The two sides of the triangular turbulence cavity (112) Each opposite side corresponds to an extension of the waist of the trapezoidal cavity (111) or is parallel to the waist of the trapezoidal cavity (111).

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