Split high-temperature furnace bottom plate support structure

Abstract

The utility model provides a kind of split high temperature furnace bottom plate support structure, including backing plate and the several supports being set on backing plate, support is the strip structure being set radially corresponding backing plate, all supports are distributed around the center of backing plate with equal interval, and mutual contact does not exist between adjacent supports;Resistance band is also provided on backing plate, and the through slot is provided in the bottom of support, so that resistance band is penetrated from the through slot without direct contact with support.In the utility model, mutual contact does not exist between supports, so the pressure received by each support is converted into internal transverse stress, and mutual extrusion does not occur, and internal stress is not prone to excessive, leading to fracture problem;Support is strip structure, which expands and deforms towards both sides after receiving the pressure of steel material, has a larger deformation buffer space, and can make the stress of steel material bottom consistent, so that internal stress is consistent during steel material heating process, and has better heat treatment effect.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature furnace bottom plate technology, and in particular to a split-type high-temperature furnace bottom plate support structure. Background Technology

[0002] Generally, heat treatment of steel is carried out using equipment such as high-temperature furnaces. This involves placing the steel on a high-temperature, pressure-resistant furnace bottom plate, creating high temperatures inside the furnace to complete the heat treatment process. For a long time, the furnace bottom plates in ring furnaces of metallurgical and machinery manufacturing plants have been made of heat-resistant steel to support steel coils and components during hot processing.

[0003] This type of furnace bottom plate, made of high-temperature alloy materials, operates under high-temperature and heavy-load conditions of around 950℃ or even exceeding 1000℃ for extended periods. The high-temperature resistance, especially high-temperature strength and creep resistance, of the high-temperature alloy material cannot meet the requirements of actual working conditions. The high high-temperature creep rate of the metal material causes the furnace bottom plate to gradually bend and deform, and the high thermal expansion rate of the material causes cracking and damage. Creep and cracking, among other factors, result in a low service life for steel furnace bottom plates made of high-temperature alloy materials. More importantly, the deformed furnace bottom plate affects the heat treatment quality and yield of the steel coils and parts it supports, reducing production efficiency.

[0004] With technological advancements, the use of high-temperature resistant ceramics as furnace bottom plate materials has emerged. For example, Chinese invention patent CN106083076A discloses a Si-SiC composite high-temperature resistant ceramic for ring furnace bottom plates. Its raw material composition and wt% are: SiC with a particle size of 3-1mm: 30-50%; SiC with a particle size of 0.074mm to less than 1mm: 15-35%; SiC with a particle size less than 0.074mm: 30-45%; and carbon powder with a particle size less than 0.074mm: 1-10%. This material possesses advantages such as high temperature resistance, good creep resistance, high high-temperature strength, good thermal shock resistance, and no cracking. The service life of the furnace bottom plate is increased from the current 10 months to 12 months or more, and the cost is only half that of heat-resistant alloy materials.

[0005] However, the aforementioned ceramic furnace bottom plate technology still has some 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. When this lateral stress is significant, it can cause the furnace bottom plate to crack, affecting its continued use. Therefore, a more suitable high-temperature furnace bottom plate structure is needed. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a split-type high-temperature furnace bottom plate support structure, which solves the problem of large internal lateral stress that easily causes furnace bottom plate breakage in existing technologies.

[0007] According to an embodiment of the present invention, a split-type high-temperature furnace bottom plate support structure includes a pad and several supports disposed on the pad. The pad is a circular plate with a horizontal top, and the supports are strip structures arranged radially corresponding to the pad. The tops of the supports are horizontal and the top surfaces of all supports are coplanar. All supports are distributed around the center of the pad at equal intervals. Adjacent supports do not contact each other, and the length of the supports is less than the radius of the pad.

[0008] The pad is also provided with a resistance strip, which forms several concentric ring structures on the pad. The rings formed by the resistance strip correspond to the center of the pad. The bottom of the support is provided with a through groove corresponding to the position of the resistance strip, so that the resistance strip passes through the through groove without directly contacting the support.

[0009] Furthermore, a circular hollow section is provided at the center of the pad.

[0010] Furthermore, the pad has several round holes evenly distributed on it, and the round holes pass through the upper and lower sides of the pad.

[0011] Furthermore, the bottom surface of the pad is provided with a plurality of radially recessed grooves, which are upwardly recessed.

[0012] Furthermore, the horizontal cross-section of the support is hexagonal, with the two sides of the center and outer edge of the corresponding pad being parallel to each other, and the remaining four sides being radially symmetrical along the pad and inclined outward toward the axis of symmetry, forming two oppositely outward-facing sharp corners.

[0013] Furthermore, the location of the sharp corner is closer to the center of the pad than the entire support.

[0014] Furthermore, a groove is provided at the center of the top of the support, which runs radially along the pad and extends through the top surface of the support.

[0015] Furthermore, a heat insulation layer is provided on the surface of the pad, and the resistor strip is installed on the surface of the heat insulation layer.

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

[0017] 1. This utility model adopts multiple independently set supports arranged in a ring, and the supports do not contact each other. Therefore, after the pressure on each support is converted into internal transverse stress, there will be no mutual squeezing, and thus it is not easy to have excessive internal stress leading to breakage.

[0018] 2. The support of this utility model is a strip structure with a corresponding radius. When it is subjected to the pressure of steel, it can expand and deform to both sides, thus having a large deformation buffer space. At the same time, it can make the bottom of the steel uniformly stressed, so that the internal stress of the steel is uniform during the heating process, resulting in a better heat treatment effect.

[0019] 3. In this practical application, the resistance band passes through the support in a ring-shaped groove on the pad. The arrangement is completely uniform, without any local differences, thus resulting in more uniform heating and better heat treatment effect. Attached Figure Description

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

[0021] Figure 2 This is a top view of an embodiment of the present utility model.

[0022] Figure 3 This is a vertical cross-sectional view of the pad and resistor strip in an embodiment of this utility model.

[0023] In the above figures: 1. Pad; 2. Support; 3. Resistance strip; 11. Round hole; 12. Receiving groove; 13. Hollowed-out part; 14. Heat insulation layer; 21. Groove; 22. Through 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 split high-temperature furnace bottom plate support structure, including a pad plate 1 and a plurality of supports 2 disposed on the pad plate 1.

[0026] like Figure 2 As shown, in this embodiment, the pad 1 is a circular plate with a horizontal top. A circular perforation 13 is provided at the center of the pad 1 to reduce weight and facilitate heat transfer. Several circular holes 11 are evenly distributed on the pad 1, extending through both the top and bottom sides. This allows the pad 1 to buffer internal deformation under pressure from the upper support 2, reducing the probability of breakage due to internal stress. Furthermore, several radially recessed receiving grooves 12 are provided on the bottom surface of the pad 1. These grooves are upwardly recessed, preventing the bottom surface of the pad 1 from contacting the ground across its entire plane, thus avoiding impurities on the ground from disrupting the balance of the pad 1.

[0027] Support 2 is a strip structure radially arranged corresponding to pad 1. The top of support 2 is horizontal, and the top surfaces of all supports 2 are coplanar. All supports 2 are evenly distributed around the center of pad 1, and adjacent supports 2 do not contact each other. The length of support 2 is less than the radius of pad 1. Preferably, the horizontal cross-section of support 2 is hexagonal, with the two sides corresponding to the center and outer edges of pad 1 being parallel to each other. The other four sides are radially symmetrical along pad 1 and inclined outwards towards the axis of symmetry, forming two opposite outward-facing sharp corners. That is, support 2 forms a hexagonal prism structure. After the vertical force is converted into transverse internal stress, it can be constrained by the triangular sharp corner edge structure on both sides, and obtains better transverse stress bearing capacity through the principle of triangle stability.

[0028] Furthermore, the sharp corner is positioned closer to the center of the pad 1 relative to the entire support 2. This concentrates the load-bearing area for small-volume steel, preventing situations where only a small portion of the support 2's interior contacts the steel, thus avoiding excessive stress on the inner end and radial breakage. Simultaneously, a radial groove 21 is provided at the center of the top of the support 2, extending through the top surface of the pad 1. This groove 21 allows heat generated by the resistance band 3 below to penetrate more effectively, facilitating heating. The evenly distributed grooves 21 also provide greater stress release space within the support 2, preventing breakage.

[0029] A resistance band 3 is also provided on the pad 1. The resistance band 3 forms several concentric ring structures on the pad 1, and the rings formed by the resistance band 3 all correspond to the center of the pad 1. A through groove 22 is provided at the bottom of the support 2 corresponding to the position of the resistance band 3, so that the resistance band 3 passes through the through groove 22 without directly contacting the support 2. The resistance band 3 is arranged in a ring on the pad 1 through the through groove 22 of the support 2. Its arrangement is completely uniform and there are no local differences. Therefore, the heating above is more uniform, and a better heat treatment effect can be obtained.

[0030] Preferably, a heat insulation layer 12 is further provided on the surface of the pad 1, and the resistance band 3 is installed on the surface of the heat insulation layer 12. The heat insulation layer 12 can prevent the heat generated by the resistance band 3 from being transferred downwards towards the pad 1, thereby reducing heat loss and improving energy utilization. Specifically, the heat insulation layer 12 is composed of heat insulation cotton and heat insulation bricks.

[0031] 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 split-type high-temperature furnace bottom plate support structure, characterized in that: It includes a pad and several supports disposed on the pad. The pad is a circular plate with a horizontal top. The supports are strip structures arranged radially corresponding to the pad. The tops of the supports are horizontal and the top surfaces of all supports are coplanar. All supports are distributed around the center of the pad at equal intervals. Adjacent supports do not contact each other, and the length of the supports is less than the radius of the pad. The pad is also provided with a resistance strip, which forms several concentric ring structures on the pad. The rings formed by the resistance strip correspond to the center of the pad. The bottom of the support is provided with a through groove corresponding to the position of the resistance strip, so that the resistance strip passes through the through groove without directly contacting the support.

2. The split-type high-temperature furnace bottom plate support structure as described in claim 1, characterized in that: The pad has a circular cutout at its center.

3. The split-type high-temperature furnace bottom plate support structure as described in claim 1, characterized in that: The pad has several round holes evenly distributed on it, and the round holes pass through the upper and lower sides of the pad.

4. The split-type high-temperature furnace bottom plate support structure as described in claim 1, characterized in that: The bottom surface of the pad is provided with several radially recessed grooves, which are upwardly recessed.

5. The split-type high-temperature furnace bottom plate support structure as described in claim 1, characterized in that: The horizontal cross-section of the support is hexagonal, with the two sides of the center and outer edge of the corresponding pad being parallel to each other. The other four sides are radially symmetrical along the pad and inclined outward toward the axis of symmetry, forming two opposite outward-facing sharp corners.

6. The split-type high-temperature furnace bottom plate support structure as described in claim 5, characterized in that: The location of the sharp corner is closer to the center of the pad than the entire support.

7. The split-type high-temperature furnace bottom plate support structure as described in claim 1, characterized in that: The support is also provided with a groove at the center of the top, which runs radially through the top surface of the support.

8. The split-type high-temperature furnace bottom plate support structure as described in claim 1, characterized in that: The surface of the pad is also provided with a heat insulation layer, and the resistor strip is installed on the surface of the heat insulation layer.

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