Rapidly coolable box furnace

Abstract

The utility model discloses a box type furnace of quick cooling, including furnace shell, furnace lining, support roller group, first cooling part, second cooling part and heating wire, the furnace lining is located in the furnace shell, and its inside forms the hearth, the support roller group sets up in the hearth, the first cooling part sets up in the furnace shell outside, and with the outer wall of furnace shell contact, the second heating wire at least includes the first cooling part of extending to the hearth, the heating wire is through the furnace shell and respectively extends in the hearth and furnace lining.

Description

Technical Field

[0001] This utility model belongs to the field of industrial kiln technology, specifically relating to a box furnace that can cool down rapidly. Background Technology

[0002] Currently, most box furnaces use a closed furnace door for natural cooling during the cooling phase to maintain the furnace atmosphere. While this improves material yield, the process is slow and time-consuming, hindering production efficiency. Some box furnaces incorporate cooling pipes within the rollers. While this reduces furnace space requirements, it increases roller complexity, complicates maintenance, and can lead to significant temperature differences between the bottom of the sagger and other parts, potentially increasing the defect rate of materials within the sagger.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a box furnace that can cool down quickly, so as to improve the cooling effect of the box furnace while ensuring the uniformity of the sagger temperature during cooling.

[0005] To achieve the above objectives, a specific embodiment of this utility model provides a box furnace capable of rapid cooling, comprising a furnace shell, a furnace lining, a support roller assembly, a first cooling element, a second cooling element, and a heating wire. The furnace lining is disposed inside the furnace shell, forming a furnace chamber inside it. The support roller assembly is disposed inside the furnace chamber. The first cooling element is disposed outside the furnace shell and contacts the outer wall of the furnace shell. The second heating wire includes at least a first cooling portion extending into the furnace chamber. The heating wire penetrates the furnace shell and extends into the furnace chamber and the furnace lining, respectively.

[0006] In one or more embodiments of the present invention, the first cooling element includes a hollow cooling jacket attached to one of the outer walls of the furnace shell, the cooling jacket including an inlet and an outlet.

[0007] In one or more embodiments of this utility model, a furnace door is provided on one side of the furnace shell, and the cooling jacket is attached to the furnace shell sides and opposite surfaces on both sides of the furnace door.

[0008] In one or more embodiments of the present invention, each of the cooling jackets partially or completely covers the outer wall surface of the furnace shell to which it is attached.

[0009] In one or more embodiments of this utility model, the cooling jacket is attached to the top and / or bottom surface of the furnace shell, and the cooling jacket partially or completely covers the top / bottom surface of the furnace shell.

[0010] In one or more embodiments of the present invention, the cooling jacket includes two parallel main plates and a side plate connecting the two main plates, wherein one of the main plates is attached to the outer wall of the furnace shell, a cavity is formed between the two main plates, and / or the inlet and outlet of the cooling jacket are respectively located at the bottom and the top.

[0011] In one or more embodiments of the present invention, the second cooling element is a cooling pipe extending into the furnace chamber and furnace lining, and extending to the outside of the furnace shell at both ends, and the first cooling part is the portion of the cooling pipe extending into the furnace chamber.

[0012] In one or more embodiments of the present invention, the cooling pipe further includes a second cooling section, which is the portion of the cooling pipe that passes through the furnace lining, and / or multiple cooling pipes are fixed on the furnace shell, with the multiple cooling pipes laid flat above the support roller assembly.

[0013] In one or more embodiments of this utility model, the heating wires are respectively arranged above and below the support roller group.

[0014] In one or more embodiments of this utility model, a support frame is further provided outside the furnace shell, and the furnace shell is fixed to the support frame.

[0015] Compared with the prior art, the box furnace of this utility model adopts a dual cooling method, which uses two cooling components to cool the material from inside and outside the furnace respectively. This can greatly improve the cooling rate of the material inside the furnace while ensuring the furnace atmosphere, shorten the cooling time while ensuring the material yield, and improve production efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front sectional view of a box furnace in one embodiment of the present invention;

[0018] Figure 2 This is a side sectional view of a box furnace in one embodiment of the present invention.

[0019] Explanation of key figure labels:

[0020] 100-Box furnace, 10-Furnace shell, 11-Furnace door, 20-Furnace lining, 21-Furnace chamber, 30-Support roller assembly, 40-First cooling element, 50-Second cooling element, 60-Heating wire. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0022] like Figure 1-2 As shown, in one embodiment of the present invention, a box-type furnace 100 includes a furnace shell 10, a furnace lining 20, a support roller assembly 30, a first cooling element 40, a second cooling element 50, and a heating wire 60. The furnace lining 20 is disposed inside the furnace shell 10, and a furnace chamber 21 is formed within the furnace lining 20. The support roller assembly 30 is disposed inside the furnace chamber 21 and includes multiple rollers for supporting the sagger. The first cooling element 40 is disposed outside the furnace shell 10 and contacts the outer wall of the furnace shell 10. The second cooling element 50 includes at least a first cooling portion extending into the furnace chamber 21. The heating wire 60 penetrates the entire furnace shell 10, with a portion extending into the furnace chamber 21 and a portion extending into the furnace lining 20.

[0023] In this embodiment, the box furnace 100 employs a dual cooling system (a first cooling element 40 and a second cooling element 50). The second cooling element 50 is located inside the furnace chamber 21, primarily used to reduce the furnace temperature. The first cooling element 40 is attached to the outer wall of the furnace shell 10, indirectly reducing the furnace temperature by lowering the temperatures of the furnace shell 10 and the furnace lining 20. The second cooling element 50 is independently located within the furnace chamber 21 and is not integrated with the rollers to avoid encroaching on furnace space; therefore, the integration level of the component is relatively low, facilitating later disassembly and maintenance. Furthermore, the first cooling section of the first cooling element 40, used for cooling, is attached to the outer wall of the furnace shell 10, resulting in a larger contact area and better cooling effect. With dual cooling from both inside and outside, the cooling rate of the materials inside the furnace is significantly increased while maintaining the furnace atmosphere, saving time and improving production efficiency while ensuring material yield.

[0024] Specifically, the first cooling element 40 is a hollow cooling jacket attached to the side wall of the furnace shell 10. It includes an inlet and an outlet. An external refrigerant (such as compressed air, water, or other coolant) circulates in the cooling jacket to carry away the heat from the furnace shell 10, and then carries away the heat from the furnace lining 20 and the furnace chamber 21.

[0025] like Figure 2 As shown, a furnace door 11 is provided on one side of the furnace shell 10. To further improve the cooling effect, the number of first cooling elements 40 can be increased, for example, in... Figure 1 , 2 In the embodiment shown, the aforementioned cooling jackets are provided on the sides of the furnace shell 10 on both sides of the furnace door 11 and on the opposite side of the furnace door 11. By increasing the coverage area of ​​the outer wall of the furnace shell 10, the heat transfer and furnace cooling efficiency are improved.

[0026] In one embodiment, the cooling jacket may partially or completely cover the outer wall surface of the furnace shell 10 to which it is attached. For example, if the outer wall surface of the furnace shell 10 where one of the cooling jackets is located is smooth, it may be configured to be integrally attached to the outer wall surface. Alternatively, if there are protrusions or other components fixed on the outer wall surface of the furnace shell 10 where one of the cooling jackets is located, the cooling jackets need to avoid the protrusions or components, but still need to cover the remaining smooth areas.

[0027] Furthermore, when the surface condition is ideal, such as a relatively flat surface without excessive protrusions, the aforementioned cooling jacket can also be installed on the top and / or bottom surface of the furnace shell 10, so that the cooling jacket completely or partially covers the top or bottom surface of the furnace shell 10. By covering the outer wall of the furnace shell 10 in all directions, the cooling effect of the furnace shell 10, as well as the cooling effect of the furnace lining 20, the furnace chamber 21, and the materials inside the furnace chamber 21, can be further improved.

[0028] Specifically, the cooling jacket includes two parallel main plates and a side plate connected to the main plates. One of the main plates is attached to the outer wall of the furnace shell 10, forming a relatively sealed cavity between the main plate and the side plate. It communicates with the outside world only through an inlet and an outlet. The inlet and outlet are located on the main plate or the side plate. In one embodiment, the inlet of the cooling jacket is located at the bottom and the opening is located at the top. Of course, their positions can be interchanged. This embodiment is not limited.

[0029] In one embodiment, the second cooling element 50 is a cooling pipe extending from the furnace chamber 21 and the furnace lining 20, with both ends extending outside the furnace shell 10. The first cooling section is the portion of the cooling pipe extending inside the furnace chamber 21. The two ends of the cooling pipe are the inlet and the outlet, respectively. By injecting a cooling medium (such as compressed air, water, or other coolant) into the cooling pipe, heat exchange occurs with the furnace interior, thereby removing heat from the furnace interior.

[0030] The portion of the second cooling element 50 extending into the furnace lining 20 is the second cooling section. When the cooling medium flows through the second cooling section, it can continuously carry away the heat of the furnace lining 20. Therefore, the heat of the furnace lining 20 can be carried away by the first cooling element 40 and the second cooling element 50 at the same time, which further improves the cooling effect and thus improves the cooling effect of the furnace chamber 21.

[0031] Furthermore, multiple cooling pipes as described above are fixed on the furnace shell 10, laid flat above the support roller assembly 30. Since hot air is lighter, the upper space of the furnace chamber 21 has the highest temperature. By placing the cooling pipes above the support roller assembly 30, that is, near the top of the furnace chamber 21, the air above is cooled and moves downward, while the air below, heated by the material, moves upward. This creates a circulation of hot and cold air within the furnace chamber 21, which helps to accelerate the cooling of the furnace temperature and the material temperature.

[0032] Due to the limited operating temperature inside the furnace, cooling pipes are generally made of various ceramic or silicon carbide materials. Furthermore, due to the processing limitations of these materials, gas is typically introduced into the cooling pipes for safety. During installation, the gap between the cooling pipe and the furnace lining 20 should be filled with putty. The cooling pipe is connected to an external cooling gas circulation pipeline via a welded connection located outside the furnace shell 10. Manual or automatic ball valves are installed at both ends of the cooling pipe to prevent the introduction of cooling gas during furnace heating or heat preservation, allowing cooling gas to be introduced only during the cooling process.

[0033] In such Figure 1 In the embodiment shown, the furnace chamber 21 adopts an arc-shaped dome design, that is, the top of the furnace lining 20 adopts an inward design. Compared with the flat top structure, this design has a stronger ability to gather hot gas in the furnace and is more conducive to the circulation of gas in the furnace.

[0034] The box furnace 100 in this embodiment uses electric heating, which is simpler and cleaner than fossil fuel heating and has higher safety.

[0035] Preferably, heating wires 60 are provided above and below the support roller group 30. This arrangement provides heat sources on both the upper and lower sides of the sagger, resulting in a more uniform heating effect throughout the furnace chamber 21. There will be no significant temperature difference, which improves the temperature consistency of the sagger and the material inside the sagger during heating, thereby improving the product yield.

[0036] The heating wire 60 extends partly into the furnace chamber 21 and partly into the furnace lining 20. Therefore, it can heat the furnace chamber 21 and the furnace lining 20 at the same time, so that the temperature around the furnace chamber 21 is uniform and the temperature inside the furnace is more uniform.

[0037] To address the structural requirement that heating wires 60 and the like need to pass through both sides of the furnace shell 10, a metal sleeve is provided between the cooling jacket and the outer wall of the furnace shell 10. This sleeve is fully welded to the inner and outer plates to isolate the cooling cavity (cooling jacket cavity) from the furnace shell 10.

[0038] In such Figure 1 In the illustrated embodiment, the box furnace 100 further includes a support frame 70 disposed outside the furnace shell 10. The entire furnace shell 10 is connected and fixed to the support frame 70 by angle steel to prevent it from moving independently during operation. The support frame 70 is welded with accessories such as a heater cover and internal wire welded external connectors for supplying power to the heating wire 60 and providing external cooling air or water sources to the first cooling element 40 and the second cooling element 50.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A box furnace capable of rapid cooling, characterized by comprising: include: Furnace shell; A furnace lining is disposed inside the furnace shell, and a furnace chamber is formed inside the furnace lining; A support roller assembly is installed inside the furnace. The first cooling element is disposed outside the furnace shell and in contact with the outer wall of the furnace shell; The second cooling component includes at least a first cooling section extending into the furnace chamber; Heating wires penetrate the furnace shell and extend into the furnace chamber and furnace lining, respectively.

2. The box furnace according to claim 1, characterized in that The first cooling element includes a hollow cooling jacket attached to one of the outer walls of the furnace shell, the cooling jacket including an inlet and an outlet.

3. The box furnace of claim 2, wherein A furnace door is provided on one side of the furnace shell, and cooling jackets are attached to the sides of the furnace shell on both sides of the furnace door and the opposite side.

4. The box furnace of claim 3, wherein Each of the cooling jackets partially or completely covers the outer wall surface of the furnace shell to which it is attached.

5. The box furnace according to claim 3, characterized in that, The cooling jacket is attached to the top and / or bottom surface of the furnace shell, and the cooling jacket partially or completely covers the top / bottom surface of the furnace shell.

6. The box furnace of claim 2, wherein The cooling jacket includes two parallel main plates and a side plate connecting the two main plates. One of the main plates is attached to the outer wall of the furnace shell, and a cavity is formed between the two main plates. The inlet and outlet of the cooling jacket are located at the bottom and top, respectively.

7. The box furnace of claim 1, wherein The second cooling element is a cooling pipe that extends into the furnace chamber and furnace lining, and extends to the outside of the furnace shell at both ends. The first cooling part is the portion of the cooling pipe that extends into the furnace chamber.

8. The box furnace of claim 7, wherein The cooling pipe further includes a second cooling section, which is the portion of the cooling pipe that passes through the furnace lining, and / or Multiple cooling pipes are fixed on the furnace shell, and the multiple cooling pipes are laid flat above the support roller group.

9. The box furnace of claim 1, wherein The heating wires are respectively arranged above and below the support roller assembly.

10. The box furnace of claim 1, wherein It also includes a support frame disposed outside the furnace shell, and the furnace shell is fixed to the support frame.

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