A tunnel kiln car refractory composite structure

Abstract

The utility model relates to a kiln car refractory composite structure for tunnel kiln, including the load -bearing layer, stress dispersion layer and heat insulation layer who sets up from top to bottom order, the heat insulation layer includes edge firebrick, the heat insulation layer still includes a plurality of inside firebrick, the top of edge firebrick is high outside, and the inside is low and constitutes the locating step, and there is heat insulation gap between adjacent inside firebrick, and edge firebrick and inside firebrick are all vertical bricks of hollow structure, and the inner hole of edge firebrick, the inner hole of inside firebrick and heat insulation gap are filled with refractory material lining, and the stress dispersion layer and heat insulation layer between lay heat -insulating blanket, and the stress dispersion layer includes a plurality of plane bricks who are laid on the upside of heat -insulating blanket, and the bottom of the outermost circle plane brick has the locating structure for adapting with locating step, and the load -bearing layer includes a plurality of mesa bricks who are laid on the upside of stress dispersion layer. The utility model improves the heat insulation capacity of kiln car refractory composite structure in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of kiln technology, and in particular to a refractory composite structure for a tunnel kiln car. Background Technology

[0002] When a tunnel kiln is in operation, the material to be sintered, such as refractory bricks, needs to be fed into the kiln by a kiln car for combustion. After combustion, the refractory bricks are transported out of the tunnel kiln by a kiln car.

[0003] In existing technologies, kiln cars generally consist of a metal frame with refractory lining. This refractory lining comprises one or at least two layers of refractory composite structure. During use, the material to be sintered is placed on top of the refractory lining. The main temperature of the kiln is concentrated at the height of the material to be sintered. The refractory lining serves to bear the load and provide insulation, preventing excessive heat transfer to the frame and thus affecting the overall service life of the frame.

[0004] The problem with existing technologies is that the unreasonable design of refractory composite structures results in less than ideal overall thermal insulation performance, and it is also difficult to achieve a combination of load-bearing and thermal insulation effects. Utility Model Content

[0005] The purpose of this invention is to provide a refractory composite structure for kiln cars in tunnel kilns, so as to improve the heat insulation capability of existing refractory composite structures for kiln cars.

[0006] To solve the above-mentioned technical problems, the technical solution of the refractory composite structure for a tunnel kiln car in this utility model is as follows: A composite refractory structure for a tunnel kiln car includes a load-bearing layer, a stress-dispersing layer, and a heat-insulating layer arranged sequentially from top to bottom. The heat-insulating layer includes a ring of square-distributed edge refractory bricks, with each edge refractory brick connected end to end. The heat-insulating layer also includes multiple inner refractory bricks arranged in an array on the inner side of the edge refractory bricks. The top of the edge refractory bricks is higher on the outside and lower on the inside, forming a positioning step. There is a heat-insulating gap between adjacent inner refractory bricks. Both the edge refractory bricks and the inner refractory bricks are hollow vertical bricks. The inner holes of the edge refractory bricks, the inner holes of the inner refractory bricks, and the heat-insulating gaps are filled with refractory material linings. A heat-insulating blanket is laid between the stress-dispersing layer and the heat-insulating layer. The stress-dispersing layer includes multiple flat bricks laid flat on the upper side of the heat-insulating blanket. The bottom of the outermost ring of flat bricks has a positioning structure for adapting to the positioning step. The load-bearing layer includes multiple platform bricks laid flat on the upper side of the stress-dispersing layer.

[0007] Furthermore, adjacent edge refractory bricks are positioned and connected by a convex-concave positioning structure.

[0008] Furthermore, the flat brick is provided with at least two through holes that penetrate the flat brick.

[0009] Furthermore, each planar brick spans at least two corresponding edge refractory bricks or inner refractory bricks in the front-back or left-right direction.

[0010] Furthermore, multiple supporting ridges are arranged in parallel on the upper surface of the countertop tile.

[0011] Furthermore, the width of the countertop tiles gradually narrows from top to bottom, forming a ventilation channel that is narrower at the top and wider at the bottom between two adjacent countertop tiles.

[0012] The beneficial effects of this utility model are as follows: In use, the material to be sintered is placed on the table brick, which is used to directly contact and bear the weight of the material to be sintered. The flat brick acts as an intermediate transition, which is used to evenly distribute the weight of the table brick and to provide heat insulation. The edge refractory bricks and inner refractory bricks of the heat insulation layer are hollow vertical bricks, which improves its load-bearing capacity and reduces its own weight and the heat transfer area between it and the frame. Refractory material lining is set in the heat insulation gap and the inner hole of the corresponding refractory brick to ensure the heat insulation capacity of the heat insulation layer, thereby reducing the heat transfer to the frame and ensuring the service life of the frame. Attached Figure Description

[0013] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding portions, wherein: Figure 1 This is a schematic diagram of one embodiment of the refractory composite structure for a tunnel kiln car in this utility model; Figure 2 yes Figure 1 Schematic diagram of the structure after removing the load-bearing layer Figure 3 This is a structural schematic diagram of the stress dispersion layer assembly process in this utility model; Figure 4 yes Figure 2 A schematic diagram of the structure after removing the stress dispersion layer; Figure 5 yes Figure 4 A schematic diagram of the structure after removing the insulation blanket; 1. Load-bearing layer; 2. Stress-dispersing layer; 3. Insulation layer; 4. Frame; 5. Tabletop brick; 6. Support ridge; 7. Flat brick; 8. Edge refractory brick; 9. Inner refractory brick; 10. Insulation gap; 11. Positioning structure; 12. Flat brick through hole; 13. Concave-convex positioning structure; 14. Positioning step; 15. Ventilation channel. Detailed Implementation

[0014] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. The accompanying drawings show preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0015] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0016] An example of an implementation of an expanded support pile in this utility model is shown below. Figures 1-5 As shown: It includes a load-bearing layer 1, a stress-dispersing layer 2, and a heat-insulating layer 3 arranged in order from top to bottom.

[0017] The insulation layer includes a ring of square-distributed edge refractory bricks 8, with each edge refractory brick 8 connected end to end. The insulation layer also includes multiple inner refractory bricks 9 arranged in an array on the inner side of the edge refractory bricks 8. The top of the edge refractory bricks is higher on the outside and lower on the inside, forming a positioning step 14. There is an insulation gap 10 between adjacent inner refractory bricks. Both the edge refractory bricks 8 and the inner refractory bricks 9 are hollow vertical bricks.

[0018] Item 4 in the figure represents the frame. The upper end of the frame is provided with edge positioning grooves corresponding to the edge refractory bricks and inner positioning grooves corresponding to the inner refractory bricks. The bottom positioning of each edge refractory brick is inserted into the corresponding edge positioning groove, and the bottom positioning of each inner refractory brick is inserted into the corresponding inner positioning groove.

[0019] The inner holes of the edge refractory brick 8, the inner holes of the inner refractory brick 9, and the insulation gap are filled with refractory material lining. In this embodiment, the refractory material lining is made of ceramic fiber that can deform according to the shape of the filling space to better adapt to the inner holes of the edge refractory brick, the inner holes of the inner refractory brick, and the insulation gap.

[0020] Adjacent edge refractory bricks are positioned and connected by a convex-concave positioning structure 13.

[0021] A heat insulation blanket 15 is laid between the stress dispersion layer and the heat insulation layer. The stress dispersion layer includes multiple flat bricks 7 laid on the upper side of the heat insulation blanket. The bottom of the outermost ring of flat bricks has a positioning structure 11 for matching with the positioning step. The load-bearing layer includes multiple countertop bricks 7 laid on the upper side of the stress dispersion layer. The positioning step 14 cooperates with the positioning structure 11 to restrict the outward movement of the flat bricks in the stress dispersion layer.

[0022] The upper surface of the flat brick is flat, and at least two through holes are provided on the flat brick.

[0023] Each flat brick spans at least two corresponding edge refractory bricks or inner refractory bricks along the front-back (or left-right) direction. Multiple parallel supporting ribs 6 are provided on the upper surface of the table brick. The width of the table brick 5 gradually narrows from top to bottom, forming a ventilation channel 15 that is narrow at the top and wide at the bottom between two adjacent table bricks. The table brick is provided with through holes 12, which facilitates the passage of hot air and makes the temperature of the table brick uniform.

[0024] The platform brick in this invention serves as the working surface of the kiln car, directly bearing the load of the paper to be fired and protecting the internal insulation layer. The design of the ventilation channels and the grooves between the supporting edges facilitates the flow of hot air through the platform brick, ensuring the uniformity of the platform brick's temperature and promoting the uniform firing of the kiln materials. The grooves between the supporting edges also help to position the goods.

[0025] As an intermediate layer, the stress-dispersing layer is used to bear the load of the countertop bricks and fired goods, and to evenly transfer the load to the insulation layer below. The cooperation between the positioning step and the positioning structure realizes the positioning of the stress-dispersing layer, which can ensure the stability of the insulation layer and stress-dispersing layer structure and prevent the bricks from shifting during high temperature and movement.

[0026] The insulation layer, through a combination of insulation blankets, special refractory bricks, and refractory lining, minimizes heat transfer from the kiln car platform to the car frame at the bottom, thus providing thermal insulation.

[0027] In the foregoing description of this specification, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "joined" should be interpreted broadly. For example, the term "joined" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this specification, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise," 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 imply 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.

[0029] Furthermore, the terms "first" or "second," etc., used in this specification to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as indicating, explicitly or implicitly, relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A refractory composite structure for kiln cars in tunnel kilns, characterized in that: The structure comprises a load-bearing layer, a stress-dispersing layer, and a heat-insulating layer arranged sequentially from top to bottom. The heat-insulating layer includes a ring of square-distributed edge refractory bricks, with each edge refractory brick connected end to end. The heat-insulating layer also includes multiple inner refractory bricks arranged in an array on the inner side of the edge refractory bricks. The top of the edge refractory bricks is higher on the outside and lower on the inside, forming a positioning step. There is a heat-insulating gap between adjacent inner refractory bricks. Both the edge refractory bricks and the inner refractory bricks are hollow vertical bricks. The inner holes of the edge refractory bricks, the inner holes of the inner refractory bricks, and the heat-insulating gaps are filled with refractory material linings. A heat-insulating blanket is laid between the stress-dispersing layer and the heat-insulating layer. The stress-dispersing layer includes multiple flat bricks laid flat on the heat-insulating blanket. The bottom of the outermost ring of flat bricks has a positioning structure for adapting to the positioning step. The load-bearing layer includes multiple platform bricks laid flat on the stress-dispersing layer.

2. The refractory composite structure for tunnel kiln cars according to claim 1, characterized in that: Adjacent edge refractory bricks are positioned and connected by a convex-concave positioning structure.

3. The refractory composite structure for tunnel kiln cars according to claim 1, characterized in that: The flat brick has at least two through holes that penetrate the flat brick.

4. The refractory composite structure for tunnel kiln cars according to claim 1, characterized in that: Each flat brick spans at least two corresponding edge refractory bricks or inner refractory bricks in the front-back or left-right direction.

5. The refractory composite structure for kiln cars in tunnel kilns according to any one of claims 1 to 4, characterized in that: The upper surface of the countertop tile has multiple supporting ridges arranged in parallel.

6. The refractory composite structure for tunnel kiln cars according to claim 5, characterized in that: The width of the countertop tiles gradually narrows from top to bottom, forming a ventilation channel that is narrower at the top and wider at the bottom between two adjacent countertop tiles.

Images