Hearth structure of mesh belt type tempering furnace

Abstract

According to the hearth structure of the mesh belt type tempering furnace, the inner wall, except for the bottom, in a hearth is replaced with a refractory fiber layer and a refractory coating which are made of lighter materials, so that the overall weight of the hearth is reduced, the mesh belt type tempering furnace is convenient to carry, meanwhile, the refractory fiber layer and the refractory coating are adopted, the heat conductivity coefficient is lower, and the service life of the mesh belt type tempering furnace is prolonged. A better heat insulation effect can be provided, heat loss is reduced, the weight of the refractory fiber layer is lighter, the heat insulation performance can be optimized by adjusting the thickness and the density, different application requirements can be met, and therefore the heat preservation effect is improved.

Description

Technical Field

[0001] The utility model relates to a furnace chamber structure of a mesh - belt tempering furnace, belonging to the field of tempering furnaces. Background Art

[0002] The mesh - belt tempering furnace is used for tempering general metal parts in the air and for quenching, annealing, and aging heat treatment of light - alloy parts such as aluminum alloy die - castings, pistons, and aluminum plates. The outer shell is welded by steel plates and steel sections, and the trolley is welded by steel sections and steel plates. The trolley reduces heat radiation and convective losses through soft contact with the furnace lining and a sand - sealing mechanism, effectively ensuring the sealing performance of the furnace body.

[0003] However, most of the existing furnace chambers of mesh - belt tempering furnaces are formed by arranging light - weight insulating bricks. Although the light - weight insulating bricks are relatively light, for a mesh - belt tempering furnace, the proportion of the furnace chamber weight is still relatively high, making it difficult to handle the mesh - belt tempering furnace. Secondly, due to the material characteristics of the light - weight insulating bricks, their service life is relatively short. In a high - temperature environment, the brick body may gradually age, resulting in a decline in the insulation performance and requiring regular replacement. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a furnace chamber structure of a mesh - belt tempering furnace, which is lighter in overall weight and better in insulation performance.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A furnace chamber structure of a mesh - belt tempering furnace, the furnace chamber structure includes:

[0006] An outer shell, within which a rectangular space is formed;

[0007] An insulating layer, including light - weight insulating bricks arranged at the bottom of the rectangular space and insulating units arranged on the other three sides of the rectangular space. The light - weight insulating bricks and the insulating units enclose a heat - treatment space. The insulating unit includes a refractory fiber layer and a refractory coating sprayed on the surface of the refractory fiber layer.

[0008] Further, the refractory coating is any one or a combination of a silicate coating, an alumina coating, a silicon carbide coating, a high - temperature ceramic coating, a calcium silicate coating, and a graphite coating.

[0009] Further, the refractory fiber layer is any one or a combination of a ceramic fiber layer, an alumina fiber layer, a silicon - aluminum fiber layer, and a calcium silicate fiber layer.

[0010] Further, at least two layers of the refractory fiber layer are provided. One of the at least two layers of the refractory fiber layer is fixedly connected to the outer shell, and the remaining refractory fiber layers are installed on the refractory fiber layer fixedly connected to the outer shell or the outer shell through connecting pieces.

[0011] Furthermore, ribs are formed inside the outer shell, and the refractory fiber layer fixedly connected to the outer shell is arranged between two adjacent ribs, and the remaining refractory fiber layers are installed on the ribs through connecting members.

[0012] Furthermore, embedded parts are arranged inside the refractory fiber layer fixedly connected to the outer shell, and the remaining refractory fiber layers are installed on the embedded parts through connecting members.

[0013] Furthermore, the connecting member includes a fixing shaft penetrating through the refractory fiber layer and a fixing plate connected to the end of the fixing shaft and pressing on the outer side of the refractory fiber layer, and the other end of the fixing shaft is connected to the embedded part or the rib.

[0014] Furthermore, a refractory plate or a refractory coating is arranged on the light insulating brick.

[0015] The beneficial effects of the present utility model are as follows: By replacing the inner wall of the furnace chamber except the bottom with a lighter refractory fiber layer and a refractory coating, the overall weight of the furnace chamber is reduced, which is convenient for the handling of the mesh belt type tempering furnace. At the same time, the refractory fiber layer and the refractory coating have a lower thermal conductivity, which can provide better heat insulation effect and reduce heat loss. Since the refractory fiber layer is lighter in weight, the heat insulation performance can also be optimized by adjusting the thickness and density to adapt to different application requirements, thereby improving the heat preservation effect.

[0016] The above description is only an overview of the technical solution of the present utility model. In order to understand the technical means of the present utility model more clearly and implement it according to the content of the specification, the following describes in detail with reference to the preferred embodiments of the present utility model and the accompanying drawings. Description of the Drawings

[0017] Figure 1 It is a cross-sectional view of the furnace chamber structure of a mesh belt type tempering furnace shown in an embodiment of the present application.

[0018] Figure 2 It is Figure 1 an enlarged view of the structure of part A of the furnace chamber structure in Detailed Embodiments

[0019] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0022] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "attachment", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Additionally, in the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium.

[0023] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0024] Please refer to Figures 1 to 2 , a furnace chamber structure of a mesh - belt tempering furnace (hereinafter referred to as "furnace chamber structure") shown in an embodiment of the present application. The furnace chamber structure includes a housing 10 and a heat - insulating layer.

[0025] A rectangular space is formed inside the housing 10. The housing 10 is generally a thin - walled shell made of materials such as carbon steel and stainless steel. A rectangular space is formed inside, which is used for installing a heat - insulating layer, a conveying mesh - belt, a heating component, etc. This is prior art and will not be elaborated here.

[0026] The heat insulation layer includes lightweight heat-insulating bricks 20 arranged at the bottom of the rectangular space and heat insulation units arranged on the other three sides of the rectangular space. The lightweight heat-insulating bricks 20 and the heat insulation units enclose to form a heat treatment space. The heat insulation unit includes a refractory fiber layer 30 and a refractory coating 40 sprayed on the surface of the refractory fiber layer 30. Since a conveyor mesh belt needs to be installed in the furnace chamber to convey the parts for heat treatment, the bottom of the furnace chamber needs to have a relatively high mechanical strength and be able to withstand large loads and pressures. Therefore, the bottom of the furnace chamber still uses lightweight heat-insulating bricks 20 as the heat insulation layer and also as the load-bearing structure of the conveyor mesh belt. For the two side walls and the top of the furnace chamber, since they are not load-bearing structures, by setting a lighter refractory fiber layer 30 and a refractory coating 40, while ensuring the heat insulation effect, the overall weight of the furnace chamber is greatly reduced.

[0027] In this embodiment, the refractory coating 40 is any one or a combination of a silicate coating, an alumina coating, a silicon carbide coating, a high-temperature ceramic coating, a calcium silicate coating, and a graphite coating. By spraying the refractory coating 40 on the surface of the refractory fiber layer 30, the refractory and heat insulation effect of the refractory fiber layer 30 is further improved. At the same time, since most of the above-mentioned refractory coatings 40 have characteristics such as high-temperature tolerance, abrasion resistance, and chemical stability, the influence of the heat insulation layer on the parts can also be reduced, improving the product quality.

[0028] In this embodiment, the refractory fiber layer 30 is any one or a combination of a ceramic fiber layer, an alumina fiber layer, an aluminosilicate fiber layer, and a calcium silicate fiber layer. The refractory fiber layer 30 can be selected according to the temperature required by the furnace chamber, and no specific limitation is made here.

[0029] In this embodiment, at least two layers of the refractory fiber layer 30 are provided. One of the at least two layers of the refractory fiber layer 30 is fixedly connected to the outer shell 10, and the remaining refractory fiber layers 30 are installed on the refractory fiber layer 30 fixedly connected to the outer shell 10 or the outer shell 10 through a connecting member 60. The refractory fiber layer 30 fixedly connected to the outer shell 10 is the base refractory fiber layer 31, and the remaining refractory fiber layers 30 installed inside the base refractory fiber layer 31 are the surface refractory fiber layers 32. By setting multiple layers of the refractory fiber layer 30, the heat insulation effect can be effectively improved. At the same time, with such a setting, when the refractory fiber layer 30 needs to be replaced, the surface refractory fiber layer 32 can be replaced by removing the connecting member 60, which is convenient for replacing the refractory fiber layer 30.

[0030] In this embodiment, ribs are formed inside the outer shell 10. The refractory fiber layer 30 fixedly connected to the outer shell 10 is arranged between two adjacent ribs, and the remaining refractory fiber layers 30 are installed on the ribs through connectors 60. The ribs extend from the inner wall of the shell towards the interior of the rectangular space, and the ribs are distributed at intervals on the inner wall of the shell to form a number of installation grooves, and the base refractory fiber layer 31 is fixedly installed in the installation grooves for easy clamping and fixing.

[0031] In this embodiment, the connector 60 includes a fixing shaft 61 penetrating through the refractory fiber layer 30 and a fixing plate 62 connected to the end of the fixing shaft 61 and pressing on the outside of the refractory fiber layer 30. The other end of the fixing shaft 61 is connected to the rib. The fixing shaft 61 can be connected by means of threaded connection or clamping, etc., which is convenient for disassembly, so as to facilitate replacement and maintenance.

[0032] In another embodiment, embedded parts are provided in the refractory fiber layer 30 fixedly connected to the outer shell 10, and the remaining refractory fiber layers 30 are installed on the embedded parts through connectors 60. Of course, the refractory fiber layer 30 fixedly connected to the outer shell 10 can also be fixedly connected to the embedded parts through the fixing shaft 61. Such a setting can avoid setting ribs and reduce the processing difficulty of the outer shell 10.

[0033] In this embodiment, a refractory plate 50 is provided on the lightweight insulating brick 20. By providing the refractory plate 50 or the refractory coating 40, the lightweight insulating brick 20 can be protected from being directly affected by the heating components and the hot air circulation components in the furnace, thereby improving its service life. Of course, in other embodiments, a refractory coating 40 can also be provided on the lightweight insulating brick 20, as long as the above effects can be achieved, and no specific limitations are made here.

[0034] The beneficial effects of the present utility model are as follows: In this application, the inner wall of the furnace except the bottom is replaced with a lighter refractory fiber layer and a refractory coating, thereby reducing the overall weight of the furnace and facilitating the handling of the mesh belt tempering furnace. At the same time, the refractory fiber layer and the refractory coating have a lower thermal conductivity, which can provide better heat insulation effect and reduce heat loss. Since the refractory fiber layer is lighter in weight, the heat insulation performance can also be optimized by adjusting the thickness and density to adapt to different application requirements, thereby improving the heat preservation effect.

[0035] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0036] The above-described embodiments merely represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A furnace structure of a mesh belt tempering furnace, characterized in that: The furnace structure comprises: A housing having a rectangular space formed therein; The thermal insulation layer includes lightweight thermal insulation bricks arranged at the bottom of the rectangular space and thermal insulation units arranged on the other three sides of the rectangular space. The lightweight thermal insulation bricks and the thermal insulation units are arranged to form a heat treatment space. The thermal insulation unit includes a refractory fiber layer and a refractory coating sprayed on the surface of the refractory fiber layer.

2. The furnace structure of the mesh belt tempering furnace according to claim 1, characterized in that: The refractory coating is any one or more combinations of a silicate coating, an alumina coating, a silicon carbide coating, a high-temperature ceramic coating, a calcium silicate coating and a graphite coating.

3. The furnace structure of the mesh belt tempering furnace according to claim 1, characterized in that: The refractory fiber layer is any one or more combinations of a ceramic fiber layer, an alumina fiber layer, an aluminum silicate fiber layer and a calcium silicate fiber layer.

4. The furnace structure of the mesh belt tempering furnace according to claim 1, characterized in that: The refractory fiber layer is provided with at least two layers, at least one of which is fixedly connected to the outer shell, and the other refractory fiber layer is installed on the refractory fiber layer fixedly connected to the outer shell or on the outer shell through a connecting piece.

5. The furnace structure of the mesh belt tempering furnace according to claim 4, characterized in that: Ribs are formed in the shell, the refractory fiber layer fixedly connected to the shell is arranged between two adjacent ribs, and the remaining refractory fiber layers are installed on the ribs through connecting pieces.

6. The furnace structure of the mesh belt tempering furnace according to claim 4, characterized in that: An embedded part is arranged in the refractory fiber layer fixedly connected to the outer shell, and the remaining refractory fiber layers are installed on the embedded part through connecting parts.

7. The furnace structure of the mesh belt tempering furnace according to claim 6, characterized in that: The connecting member comprises a fixed shaft penetrating the refractory fiber layer and a fixed plate connected to the end of the fixed shaft and pressed onto the outside of the refractory fiber layer. The other end of the fixed shaft is connected to the embedded part or the rib.

8. The furnace structure of the mesh belt tempering furnace according to claim 1, characterized in that: The lightweight thermal insulation brick is provided with a refractory board or a refractory coating.

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