A high temperature furnace floor for a bell-type furnace

Abstract

The utility model provides a kind of high-temperature furnace bottom plate for bell-type furnace, including furnace bottom brick, backing plate and panel sequentially arranged from bottom to top, furnace bottom brick includes several brick bodies, and several annular structures are formed around the same center, and adjacent brick bodies are detachably connected;Backing plate is horizontal board structure;Panel includes several sector plates, and sector plate is provided with connecting piece at adjacent place to realize detachable connection.The utility model discloses furnace bottom brick and panel are all the detachable structure formed by independent assembly, so as to adapt to various different bell-type furnace to adjust, with excellent adaptability and adjustability;Furnace bottom brick is formed by the splicing of several brick bodies, and panel is formed by the splicing of several sector plates, so that the internal transverse stress received by it can be eliminated through the connecting gap between brick body and sector plate, so as not to produce rigid fracture in overall structure, thereby protecting the integrity of overall load-bearing structure, improve service life.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature heat treatment equipment technology, and in particular to a high-temperature furnace bottom plate for bell-type furnaces. Background Technology

[0002] Bell-type furnaces are suitable for heat treatment of steel. They are equipped with a furnace bottom plate inside. The steel is placed on the high-temperature and pressure-resistant furnace bottom plate, and then the heating device generates high temperature inside the furnace to complete the heat treatment process.

[0003] For a long time, the bottom plates of ring furnaces in metallurgical and machinery manufacturing plants have been made of heat-resistant steel to support steel coils and parts for hot processing. However, these bottom plates, made of high-temperature alloy materials, operate under conditions of high temperature and heavy loads (around 950℃ or even exceeding 1000℃) for extended periods. The high-temperature resistance, especially high-temperature strength and creep resistance, of these alloy materials cannot meet the requirements of actual working conditions. The high creep rate of the metal causes the bottom plate to gradually bend and deform, and the high thermal expansion rate causes cracking and damage. Creep and cracking contribute to the low service life of steel bottom plates made of high-temperature alloy materials. More importantly, the deformed bottom plate affects the heat treatment quality and yield of the steel coils and parts it supports, reducing production efficiency.

[0004] With technological advancements, high-temperature resistant ceramics have emerged as a material for furnace bottom plates. For example, Chinese invention patent CN102898165A discloses a method for preparing a SiSiC high-temperature ceramic furnace bottom plate for annular furnaces. The method involves taking 30-50 parts of large SiC particles, 15-35 parts of small SiC particles, 30-45 parts of fine SiC powder, and 1-10 parts of carbon powder, then adding 4-9 parts of binder and mixing and molding. The mixture is then dried in a drying oven at 110℃ for 32-72 hours, followed by holding in a sintering furnace at 1700-1850℃ and a vacuum degree less than 100 Pa for 6-36 hours. After machining, the SiSiC high-temperature ceramic furnace bottom plate for annular furnaces is obtained. This method features simple processing, low cost, and the resulting product exhibits high temperature resistance, good creep resistance, high high-temperature strength, and good thermal shock resistance.

[0005] However, current furnace bottom plate structures also have certain problems. Steel exerts immense pressure on the furnace bottom plate at high temperatures, and since the furnace bottom plate is typically a one-piece structure, its top surface inevitably deforms under downward pressure, generating internal lateral stress. This can lead to problems such as fracture, affecting its continued use. Therefore, a new type of furnace bottom plate structure is needed that can counteract the lateral internal stress caused by vertical pressure. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a high-temperature furnace bottom plate for bell-type furnaces, which solves the problem that internal transverse stress caused by loads can easily lead to furnace bottom plate fracture.

[0007] According to an embodiment of this utility model, a high-temperature furnace bottom plate for a bell-type furnace includes a furnace bottom brick, a pad plate, and a panel arranged sequentially from bottom to top. The furnace bottom brick includes several vertically arranged bricks with horizontal bottom and top surfaces, and is stacked side by side around the same center to form several annular structures. In each annular structure, adjacent bricks are detachably connected. The pad plate is a horizontal plate structure, and its surface completely covers the area where the top surface of the furnace bottom brick is located.

[0008] The panel includes several sector-shaped panels, which have a common center and the same radius. When connected sequentially by radius, they can be spliced ​​into a complete circular panel. The sector-shaped panels are provided with connectors at adjacent locations, and the connectors work with the sector-shaped panels to achieve detachable connection.

[0009] Furthermore, the furnace bottom bricks are provided with protruding ridges and grooves on their two opposite vertical sides, with the protruding ridges fitting perfectly into the grooves. This allows the furnace bottom bricks to be horizontally fixed by the protruding ridges and grooves when they are connected one after the other vertically, thus forming a sturdy ring structure.

[0010] Furthermore, the outer edge of the pad has a skirt structure, including several protrusions and several recesses, wherein the protrusions and recesses are arranged alternately.

[0011] Furthermore, the annular structure of the furnace bottom brick is set in the area outside the protrusion of the pad plate, that is, the maximum diameter of the annular structure is not greater than the diameter of the recess of the pad plate, so that the annular structure is completely covered by the pad plate; the furnace bottom brick also includes a support part set outside the annular structure, the support part is composed of several bricks arranged side by side and closely connected, and is set in the area corresponding to the protrusion of the pad plate.

[0012] Furthermore, the pad is uniformly provided with several through holes running vertically through it.

[0013] Furthermore, a connecting groove is provided at the end face of the sector plate corresponding to the radius. The connecting groove is perpendicular to the edge of the end face of the sector plate. One end of the connecting groove is connected to the outside of the end face of the sector plate, and the other end is located inside the sector plate. The end inside the sector plate is perpendicular to the two sides to form a transverse part, so that when the two sector plates are connected through the end face, the two connecting grooves are also connected to each other, forming an "I" shaped structure.

[0014] Furthermore, it also includes a connecting block that is designed to work with the connecting slot. The connecting block is a columnar structure with a horizontal cross-sectional shape that is an "I" shape corresponding to two relatively connected connecting slots. This allows the connecting block to be inserted vertically into the two connecting slots of two adjacent sector plates, thereby fixing the two adjacent sector plates.

[0015] Furthermore, the end face of the sector plate corresponding to the radius has an uneven and rough structure with several tiny protrusions, and the protrusions are not tightly connected and are spaced apart.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This utility model has a furnace bottom brick, a pad plate and a panel arranged sequentially from bottom to top. The furnace bottom brick and the panel are detachable structures formed by independent components, so that they can be adjusted to adapt to various different bell-type furnaces, and have excellent adaptability and adjustability.

[0018] 2. In this utility model, the furnace bottom brick is made up of several bricks spliced ​​together, and the panel is made up of several fan-shaped plates spliced ​​together. Therefore, the internal transverse stress it is subjected to can be eliminated through the connection gap between the bricks and fan-shaped plates, so as not to cause rigid fracture in the overall structure, thereby protecting the integrity of the overall load-bearing structure and improving its service life.

[0019] 3. The furnace bottom brick of this utility model is a spliced ​​structure of multiple bricks. The overall coverage area can be adjusted by the number of spliced ​​ring structures, thereby adjusting the load-bearing center position according to the volume of different loads. In particular, for heavy objects with point contact at the bottom contact surface, it can be better adapted to avoid excessive pressure on the load-bearing point leading to breakage or damage, and has better load-bearing adjustment capability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram showing the disassembly of an embodiment of the present utility model.

[0021] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle.

[0022] Figure 3 This is an enlarged schematic diagram of the edge portion of the fan-shaped plate in an embodiment of this utility model.

[0023] In the above attached figures: 1. Bottom brick; 2. Pad plate; 3. Panel; 4. Brick body; 5. Connecting block; 6. Protrusion; 11. Support part; 21. Protrusion; 22. Recess; 23. Through hole; 31. Fan-shaped plate; 32. Connecting groove; 41. Raised ridge; 42. Groove. Detailed Implementation

[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0025] like Figure 1 As shown in the figure, this utility model embodiment proposes a high-temperature furnace bottom plate for a bell-type furnace, which includes a furnace bottom brick 1, a pad plate 2 and a panel 3 arranged sequentially from bottom to top.

[0026] like Figure 2 As shown, the furnace bottom brick 1 includes several vertically arranged bricks 4. The bottom and top surfaces of the bricks 4 are horizontal, and they are stacked side by side around the same center to form several annular structures. In each annular structure, adjacent bricks 4 are detachably connected. In this embodiment, the bricks 4 are generally arc-shaped, thus forming three concentric annular structures. The two opposite vertical sides of the furnace bottom brick 1 are respectively provided with protruding ridges 41 and grooves 42, wherein the protruding ridges 41 are precisely embedded in the grooves 42. When the furnace bottom bricks 1 are connected one after the other through the vertical surfaces, they can be fixed horizontally through the protruding ridges 41 and the grooves 42, thus forming a strong annular structure.

[0027] In a further embodiment, the pad 2 is a horizontal annular plate structure, its surface completely covering the area where the top surface of the furnace bottom brick 1 is located. Preferably, the outer edge of the pad 2 has a skirt structure, including six protrusions 21 and six recesses 22, wherein the protrusions 21 and recesses 22 are arranged alternately. The skirt structure allows for the dispersion of internal stress in the pad 2; that is, the lateral stress is absorbed by the deformation of the protruding protrusions 21 on both sides, preventing breakage due to stress excitation within the internal structure. More preferably, the pad 2 has several through holes 23 evenly distributed vertically, which better promotes the circulation of hot air and facilitates uniform heating of the load-bearing metal material above.

[0028] Correspondingly, the annular structure of the furnace bottom brick 1 is positioned outside the protrusion 21 of the pad 2, meaning the maximum diameter of the annular structure is no greater than the diameter of the recess 22 of the pad 2, ensuring the annular structure is completely covered by the pad 2. The furnace bottom brick 1 also includes six support portions 11 located outside the annular structure. Each support portion 11 consists of several bricks 4 arranged side-by-side and tightly connected, corresponding to the protrusion 21 of the pad 2. This provides uniform support to the bottom of the pad 2, ensuring even stress distribution across all positions of the pad 2.

[0029] Panel 3 includes several sector-shaped plates 31, which share a common center and the same radius. When connected sequentially by radius, they can be assembled into a complete circular plate. Adjacent sector-shaped plates 31 are provided with connectors, which work together to achieve a detachable connection. Preferably, panel 3 has a circular cutout in the center, thus transforming the sector-shaped plates 31 into arc-shaped plates.

[0030] In the specific design, a vertically penetrating connecting groove 32 is provided at the end face of the sector plate 31 corresponding to its radius. The connecting groove 32 is perpendicular to the edge of the end face of the sector plate 31. One end of the connecting groove 32 connects to the outside of the end face of the sector plate 31, and the other end is located inside the sector plate 31, with the end inside the sector plate 31 perpendicularly facing both sides to form a transverse portion. This allows the two connecting grooves 32 to be connected when the two sector plates 31 are connected through their end faces, forming an "I"-shaped structure. In conjunction with this, a connecting block 5 is provided to cooperate with the connecting groove 32. The connecting block 5 is a columnar structure with a horizontal cross-sectional shape corresponding to the "I"-shaped structure of the two relatively connected connecting grooves 32. This allows the connecting block 5 to be inserted vertically into the two connecting grooves 32 of adjacent sector plates 31, thereby fixing the two adjacent sector plates 31. The detachable connection between adjacent supports is achieved by the cooperation of the connecting groove 32 and the connecting block 5, so that the sector plate 31 can form a relatively whole while buffering horizontal stress. In this way, when some sector plates 31 are displaced due to the load difference between different sector plates 31, they are fixed by other sector plates 31, making it less likely for the sector plates 31 to move and providing better stability.

[0031] like Figure 3 As shown, the end face of the sector plate 31 corresponding to the radius has an uneven, rough structure with several tiny protrusions 6, which are not tightly connected and are spaced apart. When the sector plate 31 undergoes slight deformation at high temperature, its protrusions 6 expand outward and interlock with each other, which can buffer the internal stress caused by high temperature expansion and further reduce the possibility of the panel 3 breaking.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high-temperature furnace bottom plate for a bell-type furnace, characterized in that: The furnace includes a bottom brick, a pad plate, and a panel arranged sequentially from bottom to top. The bottom brick consists of several vertically arranged bricks with horizontal bottom and top surfaces. The bricks are stacked side by side around the same center to form several ring structures. In each ring structure, adjacent bricks are detachably connected. The pad plate is a horizontal plate structure whose surface completely covers the area where the top surface of the bottom brick is located. The panel includes several sector-shaped panels, which have a common center and the same radius. When connected sequentially by radius, they can be spliced ​​into a complete circular panel. The sector-shaped panels are provided with connectors at adjacent locations, and the connectors work with the sector-shaped panels to achieve detachable connection.

2. A high-temperature furnace bottom plate for a bell-type furnace as described in claim 1, characterized in that: The furnace bottom bricks are provided with protruding ridges and grooves on their two opposite vertical sides. The protruding ridges are fitted into the grooves, so that when the furnace bottom bricks are connected one after the other on the vertical sides, they can be fixed horizontally by the protruding ridges and grooves, thus forming a strong ring structure.

3. A high-temperature furnace bottom plate for a bell-type furnace as described in claim 1, characterized in that: The outer edge of the pad has a skirt structure, including several protrusions and several recesses, wherein the protrusions and recesses are arranged alternately.

4. A high-temperature furnace bottom plate for a bell-type furnace as described in claim 3, characterized in that: The annular structure of the furnace bottom brick is set in the area outside the protrusion of the pad plate, that is, the maximum diameter of the annular structure is not greater than the diameter of the recess of the pad plate, so that the annular structure is completely covered by the pad plate; the furnace bottom brick also includes a support part set outside the annular structure, the support part is composed of several bricks arranged side by side and closely connected, and is set in the area corresponding to the protrusion of the pad plate.

5. A high-temperature furnace bottom plate for a bell-type furnace as described in claim 1, characterized in that: The pad is evenly provided with several through holes running vertically through it.

6. A high-temperature furnace bottom plate for a bell-type furnace as described in claim 1, characterized in that: A connecting groove running vertically through the end face of the sector plate corresponding to its radius is provided. The connecting groove is perpendicular to the edge of the end face of the sector plate. One end of the connecting groove is connected to the outside of the end face of the sector plate, and the other end is located inside the sector plate. The end inside the sector plate is perpendicular to the two sides to form a transverse part, so that when the two sector plates are connected through the end face, the two connecting grooves are also connected to each other, forming an "I" shaped structure.

7. A high-temperature furnace bottom plate for a bell-type furnace as described in claim 6, characterized in that: It also includes a connecting block that is designed to work with the connecting slot. The connecting block is a columnar structure with a horizontal cross-section that is an "I" shape corresponding to two relatively connected connecting slots. This allows the connecting block to be inserted vertically into the two connecting slots of two adjacent sector plates, thereby fixing the two adjacent sector plates.

8. A high-temperature furnace bottom plate for a bell-type furnace as described in claim 1, characterized in that: The end face of the sector plate corresponding to the radius has an uneven and rough structure with several tiny protrusions, which are not closely connected and are spaced apart.

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