Fiber furnace top structure of holding furnace

Abstract

The utility model relates to the technical field of furnace top structures, in particular to a heat preservation furnace fiber furnace top structure which comprises a framework, a deformation layer, a heat preservation layer and a pouring layer, the deformation layer, the heat preservation layer and the pouring layer are sequentially laid on the framework, the deformation layer is arranged close to the interior of a furnace body, and anchoring parts are arranged among the pouring layer, the heat preservation layer and the deformation layer. The anchoring part is used for connecting and fixing the framework, the pouring layer, the heat preservation layer and the deformation layer. The method has the effect of reducing the furnace top collapse risk.

Description

A fiber furnace roof structure for heat preservation furnace Technical Field

[0001] This application relates to the technical field of furnace roof structures, and in particular to a fiber furnace roof structure for an insulated furnace. Background Technology

[0002] Currently, in the metallurgical industry, thermal equipment is constantly developing and advancing. As a key piece of equipment, the performance of the holding furnace directly affects production efficiency and product quality. With the expansion of industrial scale and technological advancements, furnaces are gradually becoming larger, which places higher demands on the furnace roof structure. The furnace roof structure must not only withstand the test of high-temperature environments but also cope with the long-term effects of thermal shock and mechanical loads. Its stability and reliability are crucial to ensuring the smooth operation of the entire production process. A good furnace roof structure helps maintain stable furnace temperatures, improves energy utilization efficiency, and thus enhances the production efficiency and competitiveness of the metallurgical industry.

[0003] In related technologies, the furnace roof structure of the holding furnace mainly adopts two methods. One is to use a single refractory brick to construct the furnace roof. Refractory bricks have certain high-temperature resistance properties and can, to some extent, prevent the high temperature inside the furnace from transferring outwards. The other is to use a monolithic castable structure. Monolithic castable can fill complex spatial structures to form a relatively complete furnace roof.

[0004] Regarding the aforementioned technologies: For ultra-large and ultra-wide furnace roof structures on equipment, furnace roof structures made of single refractory bricks or monolithic castables have insufficient thermal shock resistance and structural stability, and are prone to cracking, damage, or even collapse, leading to the risk of furnace roof collapse. Summary of the Invention

[0005] To reduce the risk of furnace roof collapse, this application provides a fiber furnace roof structure for insulated furnaces.

[0006] This application provides a fiber furnace top structure for an insulation furnace, which adopts the following technical solution:

[0007] A fiber furnace roof structure for an insulated furnace includes a skeleton and a deformation layer, an insulation layer, and a casting layer sequentially laid on the skeleton. The deformation layer is located close to the interior of the furnace body. Anchors are provided between the casting layer, the insulation layer, and the deformation layer. The anchors are used to connect and fix the skeleton, the casting layer, the insulation layer, and the deformation layer.

[0008] By adopting the above technical solutions, the cast-in-place layer and the skeleton jointly undertake the main structural support role, ensuring that the furnace roof structure has sufficient strength to withstand high temperature, thermal shock and mechanical loads; the insulation layer can effectively reduce heat loss and improve energy utilization efficiency; the deformation layer near the furnace body can absorb thermal stress through its own deformation in the high temperature environment, which helps to prevent the furnace roof structure from cracking due to excessive thermal stress; at the same time, the anchors connect and fix the skeleton, cast-in-place layer, insulation layer and deformation layer, ensuring the stability and integrity of the entire furnace roof structure and reducing the risk of furnace roof collapse.

[0009] Optionally, the frame is provided with multiple installation areas. The casting layer, the insulation layer and the deformation layer together form a furnace top module. The number of furnace top modules is equal to the number of installation areas and they are set one-to-one. Multiple furnace top modules are spliced ​​together to cover the furnace top.

[0010] By adopting the above technical solution, the cast-in-place layer, insulation layer, and deformation layer are combined to form a furnace top module. Multiple installation areas are set on the frame, ensuring that the number of furnace top modules equals the number of installation areas and that they are arranged in a one-to-one correspondence. Multiple furnace top modules are then spliced ​​together to cover the furnace top. This structure makes the installation of the furnace top more modular and standardized, facilitating construction and maintenance. Furthermore, the modular design allows for flexible adjustment of the number and layout of furnace top modules to meet different needs, adapting to various specifications of holding furnaces. In addition, the splicing of multiple furnace top modules can disperse thermal stress, reducing the risk of structural cracking due to uneven thermal expansion, thereby improving the stability and reliability of the entire furnace top structure.

[0011] Optionally, the frame is provided with a plurality of clearance slots, each clearance slot being located between two adjacent furnace top modules. A connector is provided in the clearance slot, and the connector is connected to the two adjacent furnace top modules respectively. The anchor is connected to the connector.

[0012] By adopting the above technical solution, the connectors can firmly connect adjacent furnace top modules, making multiple furnace top modules form a whole, thus enhancing the integrity and stability of the furnace top structure. At the same time, the connection between the anchors and the connectors further strengthens the connection strength of the entire structure, making the furnace top structure more stable and reliable, better able to withstand the long-term effects of high temperature, thermal shock and mechanical loads, and reducing the risk of furnace top collapse.

[0013] Optionally, the connector includes two connecting plates and a deformation plate disposed between the two connecting plates. The deformation plate is disposed in the relief groove, and the connecting plate is inserted into the furnace top module and connected to the anchor.

[0014] By adopting the above technical solution, two connecting plates are inserted into the furnace top module and connected to the anchors, which allows adjacent furnace top modules to be firmly connected together, enhancing the integrity and stability of the entire furnace top structure. Simultaneously, the deformation plate positioned between the two connecting plates can adapt to thermal expansion and contraction, deformation, and other conditions that may occur in the furnace top under high-temperature environments. When thermal deformation occurs in the furnace top, the deformation plate can buffer stress through its own deformation, thereby helping to avoid stress concentration that could damage the furnace top module or loosen the connections, further ensuring the reliability and durability of the furnace top structure under high-temperature conditions.

[0015] Optionally, the deformable plate may be corrugated or arc-shaped.

[0016] By adopting the above technical solution, the deformation plate is designed in a corrugated or arc shape. Compared with ordinary shapes, this special shape can increase the deformation space and elasticity of the deformation plate itself. When the furnace top undergoes thermal expansion or contraction due to high temperature, the corrugated or arc-shaped deformation plate can better adapt to this change, buffering and absorbing thermal stress through its own deformation. This effectively avoids cracking and damage to the furnace top structure caused by thermal stress concentration, further improving the stability and reliability of the fiber furnace top structure in high-temperature environments.

[0017] Optionally, the deformation plate is made of shape memory alloy.

[0018] By adopting the above technical solutions, shape memory alloys have special shape memory effect and superelasticity. When the holding furnace is working in a high-temperature environment, the furnace top structure will experience thermal expansion and contraction due to temperature changes. The deformation plate made of shape memory alloy can recover to its initial shape by virtue of its shape memory characteristics. It can also adapt to the size changes of the furnace top structure by using superelasticity, effectively buffering and absorbing the stress caused by thermal expansion and contraction, preventing the furnace top module from cracking or being damaged due to stress concentration, thereby ensuring the integrity and stability of the furnace top structure and extending the service life of the furnace top structure.

[0019] Optionally, an elastic refractory pad is filled between the furnace top module and the frame.

[0020] By adopting the above technical solution, an elastic refractory pad is filled between the furnace top module and the frame. On the one hand, the refractory properties of the elastic refractory pad enable it to remain stable in a high-temperature environment, preventing heat loss from the connection between the furnace top module and the frame, thus playing a good heat insulation role and further reducing the heat loss of the entire fiber furnace top structure. On the other hand, the elasticity of the elastic refractory pad can buffer the stress generated between the furnace top module and the frame due to temperature changes, mechanical vibrations, and other factors, avoiding damage or displacement caused by direct rigid contact between the furnace top module and the frame, thereby enhancing the stability and reliability of the furnace top structure and extending its service life.

[0021] Optionally, the skeleton includes a support frame and multiple reinforcing ribs, the multiple reinforcing ribs are respectively disposed on the support frame, multiple mounting areas are formed between the multiple reinforcing ribs and the support frame, one end of each reinforcing rib protrudes from the support frame and is provided with a pressure plate, the furnace top module is located between the reinforcing ribs and the support frame, the pressure plate abuts against the upper surface of the furnace top module, and the anchors are respectively connected to the pressure plate and the furnace top module.

[0022] By adopting the above technical solution, a support frame and multiple reinforcing ribs form a skeleton. The reinforcing ribs create multiple mounting areas on the support frame to hold the furnace top module. The pressure plates at the ends of the reinforcing ribs abut against the upper surface of the furnace top module, and anchors connect the pressure plates and the furnace top module together. In this way, the multiple reinforcing ribs enhance the structural strength of the support frame and improve the load-bearing capacity of the entire skeleton. The contact fit between the pressure plates and the furnace top module, along with the connection of the anchors, ensures that the furnace top module is stably mounted on the skeleton, effectively preventing displacement, shaking, or detachment of the furnace top module under the influence of high temperature, thermal shock, and mechanical loads. This ensures the stability and reliability of the fiber furnace top structure, extends the service life of the furnace top structure, and also helps maintain a stable internal environment of the furnace, ensuring its normal operation.

[0023] Optionally, the connection between the pressure plate and the furnace top module is designed in a wave shape.

[0024] By adopting the above technical solution, the connection between the pressure plate and the furnace top module is designed in a wave shape, which increases the contact area between the pressure plate and the furnace top module, thereby enhancing the friction and connection stability between the two. The wave shape design can also buffer the stress caused by temperature changes, mechanical vibration and other factors to a certain extent, reduce the relative displacement and loosening between the furnace top module and the pressure plate, and further ensure the stability and reliability of the entire fiber furnace top structure of the insulation furnace.

[0025] Optionally, the deformation layer is made of aluminum carbonate fiber blanket.

[0026] By adopting the above technical solution, the deformation layer is made of aluminum carbonate fiber blanket. Under high temperature environment, aluminum carbonate fiber blanket has the characteristics of flexible deformation, which can absorb thermal stress and prevent the structure from cracking due to thermal stress, thereby improving the stability and reliability of the furnace top structure under high temperature environment.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. Through the cooperation of the skeleton, casting layer, insulation layer, deformation layer and anchors, the furnace roof structure is ensured to have sufficient strength to withstand high temperature, thermal shock and mechanical load, which helps to avoid the furnace roof structure from cracking due to excessive thermal stress, thereby ensuring the stability and integrity of the entire furnace roof structure and reducing the risk of furnace roof collapse.

[0029] 2. By setting multiple furnace top modules, the installation of the furnace top becomes more modular and standardized, which makes it easier to flexibly adjust the number and layout of the furnace top modules according to different needs to adapt to various specifications of heat preservation furnaces. Moreover, the splicing of multiple furnace top modules can disperse thermal stress and reduce the risk of structural cracking caused by uneven thermal expansion, thereby improving the stability and reliability of the entire furnace top structure.

[0030] 3. Through the cooperation of the connecting plate and the deformation plate, adjacent furnace top modules can be stably connected together, which enhances the integrity and stability of the entire furnace top structure. When the furnace top undergoes thermal deformation, the deformation plate can buffer the stress through its own deformation, which helps to avoid stress concentration that could damage the furnace top modules or loosen the connections, and further ensures the reliability and durability of the furnace top structure in high-temperature environments.

[0031] 4. By designing the connection between the pressure plate and the furnace top module as a wave shape, the contact area between the pressure plate and the furnace top module is effectively increased, thereby enhancing the friction and connection stability between the two, reducing the relative displacement and loosening between the furnace top module and the pressure plate, and further ensuring the stability and reliability of the entire fiber furnace top structure of the insulation furnace. Attached Figure Description

[0032] Figure 1 is a schematic diagram of the overall structure of a fiber furnace top structure for a heat-insulating furnace according to Embodiment 1 of this application.

[0033] Figure 2 is a schematic diagram of the overall structure of a fiber furnace top structure for a heat-insulating furnace according to Embodiment 2 of this application.

[0034] Figure 3 is a side view of a fiber furnace top structure of a heat-insulating furnace according to Embodiment 2 of this application.

[0035] Figure 4 is a partial structural cross-sectional view along line AA in Figure 3.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Cast-in-place layer; 2. Insulation layer; 3. Deformation layer; 4. Anchors; 41. Anchor claws; 42. Anchor bricks; 5. Frame; 51. Support frame; 52. Reinforcing ribs; 521. Relief groove; 522. Pressure plate; 53. Installation area; 54. Connectors; 541. Connecting plate; 542. Deformation plate; 6. Furnace top module; 7. Elastic refractory pad. Detailed Implementation

[0038] The present application will be further described in detail below with reference to Figures 1-4.

[0039] This application discloses a fiber furnace top structure for a heat-insulating furnace.

[0040] It should be noted that in the description of this utility model, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] Example 1

[0042] Referring to Figure 1, a fiber furnace top structure for an insulated furnace includes a casting layer 1, an insulation layer 2, and a deformation layer 3. The deformation layer 3, insulation layer 2, and casting layer 1 are sequentially laid on the top of the furnace body, with the deformation layer 3 positioned close to the interior of the furnace body. Anchors 4 are provided between the deformation layer 3, insulation layer 2, and casting layer 1 to facilitate the connection and fixation of the deformation layer 3, insulation layer 2, and casting layer 1.

[0043] The casting layer 1 bears the main structural support function. In this embodiment, the casting layer 1 is cast using low-cement castable. Low-cement castable has high strength and good high-temperature resistance, and can maintain a stable structure in high-temperature environments.

[0044] The function of insulation layer 2 is to reduce heat loss. In this embodiment, insulation layer 2 is made of lightweight insulating castable. Lightweight insulating castable has the characteristics of low density and low thermal conductivity, which can effectively prevent heat from being transferred from inside the furnace to the outside.

[0045] In this embodiment, the deformation layer 3 is made of aluminum carbonate fiber blanket. Aluminum carbonate fiber blanket has good flexibility and high temperature resistance, and can absorb thermal stress through flexible deformation to avoid structural cracking.

[0046] Anchor 4 includes anchor claws 41 and anchor bricks 42. The anchor claws 41 are made of stainless steel and are spaced apart on the anchor bricks 42. The anchor claws 41 have good corrosion resistance and strength, while the anchor bricks 42 enhance the stability of the anchoring. During construction, the anchor claws 41 are inserted into each layer of material and used in conjunction with the anchor bricks 42 to tightly connect the layers, thereby ensuring the stability of the overall structure. In this embodiment, the anchor bricks 42 are made of refractory bricks and are laid on the cast-in-place layer 1.

[0047] The implementation principle of the fiber furnace roof structure of the present application embodiment is as follows: the casting layer 1 can support the insulation layer 2 and the deformation layer 3, the insulation layer 2 can reduce heat loss, and the deformation layer 3 can absorb thermal stress through flexible deformation, thereby effectively reducing heat loss and avoiding structural cracking, thus reducing the risk of furnace roof collapse.

[0048] Example 2

[0049] Referring to Figure 2, the difference between this embodiment and Embodiment 1 is that the fiber furnace top structure of the heat preservation furnace also includes a skeleton 5.

[0050] The frame 5 includes a support frame 51 and multiple reinforcing ribs 52. The support frame 51 is a closed ring structure formed by welding carbon steel rectangular tubes end to end. The multiple reinforcing ribs 52 are respectively installed on the support frame 51, and the multiple reinforcing ribs 52 divide the support frame 51 into multiple installation areas 53.

[0051] Referring to Figures 3 and 4, the furnace top module 6 is defined as consisting of the casting layer 1, the insulation layer 2, and the deformation layer 3. The number of furnace top modules 6 is equal to the number of installation areas 53 and they are set one-to-one. Multiple furnace top modules 6 are spliced ​​together to cover the furnace top.

[0052] In this embodiment, the anchor 4 is connected to both the furnace top module 6 and the reinforcing rib 52, thereby facilitating the fixing of the furnace top module 6 within the installation area 53. Furthermore, the anchor 4 and the reinforcing rib 52 are detachable, allowing the furnace top module 6 to be removed from the installation area 53.

[0053] By setting up multiple furnace top modules 6, the installation of the furnace top becomes more modular and standardized. On the one hand, the number and layout of the furnace top modules 6 can be flexibly adjusted according to different needs to adapt to various specifications of heat preservation furnaces. On the other hand, it facilitates the construction and maintenance of any furnace top module 6, avoiding the reduction of the overall furnace top structure stability due to the damage of a single furnace top module 6, thereby improving the stability and reliability of the entire furnace top structure.

[0054] Referring to Figure 4, a relief groove 521 is formed on the reinforcing rib 52 along its own length direction. A connector 54 is provided in the relief groove 521. The connector 54 includes two connecting plates 541 and a deformation plate 542 fixedly connected between the two connecting plates 541. The deformation plate 542 is located in the relief groove 521, and the reinforcing rib 52 extends from the end of the connecting plate 541 away from the deformation plate 542.

[0055] The furnace top module 6 has a slot located within the insulation layer 2. When the furnace top module 6 is installed in the installation area 53, the connecting plate 541 is inserted into the slot, and the anchor 4 is used to connect and fix the connecting plate 541 to the furnace top module 6, so that the connecting piece 54 can firmly connect adjacent furnace top modules 6, so that multiple furnace top modules 6 form a whole, enhancing the integrity and stability of the furnace top structure.

[0056] The deformation plate 542 has a corrugated or arc-shaped design. In this embodiment, the deformation plate 542 has an arc-shaped design and is made of shape memory alloy. When the furnace top undergoes thermal expansion or contraction due to high temperature, the deformation plate 542 can buffer and absorb thermal stress through its own deformation, effectively avoiding cracking and damage to the furnace top structure caused by thermal stress concentration. After the furnace top temperature returns to normal, the deformation plate 542 can recover to its initial shape by virtue of its shape memory characteristics, so as to better adapt to the size changes of the furnace top structure.

[0057] Referring to Figures 2 and 4, one end of the reinforcing rib 52 protrudes from the supporting frame 51 and is fixedly connected to a pressure plate 522, which abuts against the upper surface of the furnace top module 6. In this embodiment, the connection between the pressure plate 522 and the furnace top module 6 is designed in a wave shape, which effectively increases the contact area between the pressure plate 522 and the furnace top module 6, enhances the friction and connection stability between the two, and the wave shape design can also buffer the stress caused by temperature changes, mechanical vibrations and other factors to a certain extent, reduce the relative displacement and loosening between the furnace top module 6 and the pressure plate 522, and further ensure the stability and reliability of the entire fiber furnace top structure of the insulation furnace.

[0058] Anchors 4 are connected to the furnace top module 6 and the pressure plate 522 respectively, thereby further increasing the stability of the furnace top module 6 installation. This effectively prevents the furnace top module 6 from shifting, shaking or falling off under the influence of factors such as high temperature, thermal shock and mechanical load, ensuring the stability and reliability of the fiber furnace top structure of the insulation furnace and extending the service life of the furnace top structure.

[0059] An elastic refractory pad 7 is filled between the furnace top module 6, the reinforcing rib 52, and the supporting frame 51. In this embodiment, the elastic refractory pad 7 is made of ceramic fiber blanket. In other embodiments, the elastic refractory pad 7 may also be made of compressed refractory mortar.

[0060] The refractory properties of the elastic refractory pad 7 enable it to remain stable in high-temperature environments, preventing heat loss from the connection between the furnace top module 6 and the frame 5, thus providing good heat insulation and further reducing heat loss of the entire furnace top structure.

[0061] Furthermore, the elasticity of the elastic refractory pad 7 can buffer the stress generated between the furnace top module 6 and the frame 5 due to factors such as temperature changes and mechanical vibrations, avoiding damage or displacement caused by direct rigid contact between the furnace top module 6 and the frame 5, thereby enhancing the stability and reliability of the furnace top structure and extending the service life of the furnace top structure.

[0062] The implementation principle of the fiber furnace top structure of the present application embodiment is as follows: by dividing the furnace top structure into multiple furnace top modules 6, the installation of the furnace top is made more modular and standardized, which facilitates the construction and maintenance of any furnace top module 6, avoids the reduction of the overall furnace top structure stability due to the damage of a single furnace top module 6, and further improves the strength of the furnace top structure through the setting of the skeleton 5, thereby helping to avoid the furnace top structure from cracking due to excessive thermal stress, ensuring the stability and integrity of the entire furnace top structure, and reducing the risk of furnace top collapse.

[0063] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fiber furnace roof structure for an insulated furnace, characterized in that: It includes a frame (5) and a deformation layer (3), a heat insulation layer (2) and a casting layer (1) laid sequentially on the frame (5). The deformation layer (3) is located close to the interior of the furnace body. Anchors (4) are provided between the casting layer (1), the heat insulation layer (2) and the deformation layer (3). The anchors (4) are used to connect and fix the frame (5), the casting layer (1), the heat insulation layer (2) and the deformation layer (3).

2. The fiber furnace roof structure for heat-insulating furnaces according to claim 1, characterized in that: The frame (5) is provided with multiple installation areas (53). The casting layer (1), the insulation layer (2) and the deformation layer (3) together form a furnace top module (6). The number of furnace top modules (6) is equal to the number of installation areas (53) and they are set one by one. Multiple furnace top modules (6) are spliced ​​together to cover the furnace top.

3. The fiber furnace roof structure for the heat-insulating furnace according to claim 2, characterized in that: The frame (5) is provided with a plurality of clearance slots (521), each clearance slot (521) is located between two adjacent furnace top modules (6), and a connector (54) is provided in the clearance slot (521). The connector (54) is connected to the two adjacent furnace top modules (6) respectively, and the anchor (4) is connected to the connector (54).

4. The fiber furnace roof structure for heat-insulating furnace according to claim 3, characterized in that: The connector (54) includes two connecting plates (541) and a deformation plate (542) disposed between the two connecting plates (541). The deformation plate (542) is disposed in the relief groove (521). The connecting plate (541) is inserted into the furnace top module (6) and connected to the anchor (4).

5. The fiber furnace roof structure for the heat-insulating furnace according to claim 4, characterized in that: The deformation plate (542) is designed in a corrugated or arc shape.

6. The fiber furnace roof structure for heat-insulating furnace according to claim 4, characterized in that: The deformation plate (542) is made of shape memory alloy.

7. The fiber furnace roof structure for heat-insulating furnace according to claim 2, characterized in that: An elastic refractory pad (7) is filled between the furnace top module (6) and the frame (5).

8. The fiberized roof structure of claim 2, wherein: The frame (5) includes a support frame (51) and multiple reinforcing ribs (52). The multiple reinforcing ribs (52) are respectively disposed on the support frame (51). Multiple installation areas (53) are formed between the multiple reinforcing ribs (52) and the support frame (51). One end of the reinforcing rib (52) protrudes from the support frame (51) and is provided with a pressure plate (522). The furnace top module (6) is located between the reinforcing rib (52) and the support frame (51). The pressure plate (522) abuts against the upper surface of the furnace top module (6). The anchor (4) is connected to the pressure plate (522) and the furnace top module (6) respectively.

9. The fiber furnace roof structure for heat-insulating furnace according to claim 8, characterized in that: The connection between the pressure plate (522) and the furnace top module (6) is designed in a wave shape.

10. The fiber furnace roof structure for heat-insulating furnace according to claim 1, characterized in that: The deformation layer (3) is made of aluminum carbonate fiber blanket.

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