Double-layer structure anti-deformation energy-saving annealing furnace pad iron

Abstract

The utility model relates to energy -conserving annealing furnace pad iron technical field discloses a kind of double-layer structure anti-deformation energy-saving annealing furnace pad iron, including lower layer slab, the upper portion both sides of lower layer slab are fixedly connected with lug, the sliding connection of lug is in the inside of recess, the recess is arranged in the lower portion both sides of upper layer segmented pad iron, the downside of upper layer segmented pad iron is equipped with V type heat conduction groove, the upside of upper layer segmented pad iron is equipped with U type pressure release groove, the inside of upper layer segmented pad iron is equipped with uniformly distributed openwork hole, the lower portion both sides of lower layer slab are fixedly connected with reinforcing component, and reinforcing component greatly improves the bending resistance of lower layer slab.The utility model, by double-layer isolation and sliding guide structure, effectively guide and absorb the thermal expansion stress of upper layer pad iron, fundamentally solve the warping deformation problem caused by thermal stress concentration of traditional pad iron.

Description

Technical Field

[0001] This utility model relates to the field of energy-saving annealing furnace pad technology, and in particular to a double-layer structure anti-deformation energy-saving annealing furnace pad. Background Technology

[0002] This device relates to the technical field of industrial heat treatment equipment, specifically a key load-bearing component for large bogie-type annealing furnaces—a double-layer structure anti-deformation energy-saving annealing furnace pad—and its application method. In the heat treatment process of metallic materials, annealing is a crucial step in eliminating internal stress, improving material machinability, and preparing for subsequent processes. As a platform that directly supports high-temperature workpieces and places them in the furnace's heating zone, the structural performance and stability of the annealing furnace pad directly affect annealing quality, production safety, and the operating cost and lifespan of the entire heat treatment system.

[0003] In existing technologies, annealing furnace shims typically employ a single-layer, integral structure with a unified design. These shims are generally cast from heat-resistant alloy steel, and their structural form is often a grid plate with reinforcing ribs or a flat plate with integrated support legs. During use, this integral shim is placed directly on the refractory castable or refractory bricks on the trolley surface, while the workpiece is placed on the shim's bearing surface. Its technical principle relies on the material's inherent high-temperature strength and creep resistance, using a sufficiently large cross-sectional size and reinforcing ribs to rigidly resist the physical deformation caused by high temperatures and heavy loads.

[0004] However, the aforementioned integral shims suffer from a serious defect: structural failure due to poor thermal stress management during long-term, repeated cycles of high-temperature heating, heat preservation, and cooling. Due to their large size, significant temperature gradients inevitably occur between the upper and lower surfaces, and between the central and edge regions, during heating and cooling. This uneven temperature distribution leads to enormous, difficult-to-release thermal stresses within the shims. When these stresses accumulate and exceed the material's yield strength, irreversible macroscopic warping deformation occurs. The deformed shims can no longer be placed stably on the trolley; their twisted support legs or edges exert concentrated, destructive stress on the relatively fragile refractory castable of the trolley, causing the refractory layer to crush and crack. This not only severely shortens the service life of the shims and the trolley itself but also frequently necessitates costly equipment shutdowns for repairs, severely impacting production continuity and increasing operating costs. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a double-layer structure anti-deformation energy-saving annealing furnace pad, which aims to improve the problem that the existing integral annealing furnace pad cannot effectively manage huge thermal stress due to its structure, and is prone to warping and deformation after repeated use, which will damage the furnace trolley, resulting in short equipment life and high maintenance costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a double-layer structure anti-deformation energy-saving annealing furnace pad, comprising a lower plate, wherein protrusions are fixedly connected to both sides of the upper part of the lower plate, the protrusions are slidably connected to the inside of grooves, the grooves are provided on both sides of the lower part of the upper dividing pad, a V-shaped heat conduction groove is provided on the lower side of the upper dividing pad, a U-shaped pressure relief groove is provided on the upper side of the upper dividing pad, and uniformly distributed hollow holes are provided inside the upper dividing pad. Reinforcing components are fixedly connected to both sides of the lower part of the lower plate, the reinforcing components greatly improve the bending resistance of the lower plate.

[0007] As a further description of the above technical solution:

[0008] The reinforcing component includes a first reinforcing rib, which is fixedly connected to both sides of the lower part of the lower plate, and a second reinforcing rib is fixedly connected to both sides of the lower part of the lower plate.

[0009] As a further description of the above technical solution:

[0010] The upper dividing pad is provided with a compound layer on its exterior.

[0011] As a further description of the above technical solution:

[0012] The upper dividing pad is slidably connected to the upper side of the lower plate.

[0013] As a further description of the above technical solution:

[0014] The two first reinforcing ribs are fixedly connected to the second reinforcing ribs, together forming a grid-like or mesh-like reinforcing structure, creating multiple cavities at the bottom of the lower plate.

[0015] As a further description of the above technical solution:

[0016] Multiple upper-layer dividing pads are laid side by side on the lower-layer flat plate, with expansion gaps between adjacent upper-layer dividing pads to accommodate their independent thermal expansion and contraction.

[0017] As a further description of the above technical solution:

[0018] A thermal expansion gap is preset between the two ends of the protrusion and the groove in the sliding direction, allowing the upper dividing pad to freely expand and contract in the sliding direction when heated, thereby guiding the thermal expansion stress to a controllable direction.

[0019] As a further description of the above technical solution:

[0020] The compound layer is a nitrided layer formed by surface nitriding or carbonitriding processes. This nitrided layer improves the surface hardness, wear resistance, and high-temperature adhesion resistance of the upper dividing pad and the inner wall of the groove.

[0021] As a further description of the above technical solution:

[0022] The V-shaped heat-conducting groove, U-shaped pressure-relieving groove, and hollow holes work together to construct the upper segmented pad into a lightweight, high-heat-exchange-efficiency load-bearing unit with self-adjusting internal stress. The hollow holes are used to reduce weight and heat storage, the V-shaped heat-conducting grooves are used to guide heat flow and increase the lower heat exchange area, and the U-shaped pressure-relieving grooves are used to provide microscopic buffer space for thermal expansion of the upper surface.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the thermal expansion stress of the upper shim is effectively guided and absorbed through the double-layer isolation and sliding guide structure, which fundamentally solves the problem of warping deformation caused by thermal stress concentration in traditional shims. At the same time, the lower plate with reinforcing ribs provides a stable support base for the upper layer and protects the refractory material of the furnace trolley from damage, reducing the furnace shutdown for maintenance due to damage to the shims or trolley, and significantly extending the overall service life of the entire equipment.

[0025] 2. In this utility model, the hollow holes inside the upper dividing pad reduce its own weight and reduce heat storage, while the V-shaped heat conduction groove at the bottom increases the heat exchange area, making the pad respond faster during heating and cooling, effectively shortening the operation cycle of the entire annealing process, improving production efficiency. At the same time, less heat accumulation and downward heat conduction are hindered, reducing ineffective heat loss and achieving the goal of saving energy. Attached Figure Description

[0026] Figure 1 A perspective view of a double-layer structure anti-deformation energy-saving annealing furnace pad proposed in this utility model;

[0027] Figure 2 This is a side view of a double-layer structure anti-deformation energy-saving annealing furnace pad proposed in this utility model;

[0028] Figure 3 This is a bottom view of a double-layer structure anti-deformation energy-saving annealing furnace pad proposed in this utility model;

[0029] Figure 4 This is a schematic diagram showing the disassembled structure of a double-layer anti-deformation energy-saving annealing furnace pad proposed in this utility model.

[0030] Legend:

[0031] 1. Lower plate; 2. Protrusion; 3. Groove; 4. Upper dividing pad; 5. V-shaped heat conduction groove; 6. U-shaped pressure relief groove; 7. Hole; 8. Compound layer; 9. First reinforcing rib; 10. Second reinforcing rib. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1-4 This utility model provides an embodiment of a double-layer structure anti-deformation energy-saving annealing furnace pad, including a lower plate 1. Both sides of the upper part of the lower plate 1 are fixedly connected to protrusions 2, which are slidably connected inside grooves 3. Grooves 3 are located on both sides of the lower part of an upper dividing pad 4. The lower side of the upper dividing pad 4 has a V-shaped heat-conducting groove 5 and a U-shaped pressure-relieving groove 6. The interior of the upper dividing pad 4 has evenly distributed perforated holes 7. Both sides of the lower part of the lower plate 1 are fixedly connected to reinforcing components, which greatly improve the bending resistance of the lower plate 1. The reinforcing components include a first reinforcing rib 9, which is fixedly connected to both sides of the lower part of the lower plate 1, and a second reinforcing rib 10, which is fixedly connected to both sides of the lower part of the lower plate 1.

[0034] When using this device, the workpiece to be processed is placed on the top surface of the upper dividing shim 4. Under the high temperature inside the furnace, the shim expands due to heat. To cope with this expansion, multiple structures work together: First, the U-shaped pressure relief groove 6 on the top surface provides a micro-buffer space for the material surface, releasing local thermal stress; second, the overall macroscopic extension is constrained by the sliding guide structure formed by the protrusion 2 of the lower plate 1 and the groove 3 of the upper dividing shim 4, so that it proceeds in an orderly manner along a preset single direction; at the same time, the entire load of the upper dividing shim 4 and the workpiece is transmitted through the lower plate 1, which is supported by the first reinforcing rib 9 at the bottom and the second... The reinforcing components, consisting of two reinforcing ribs 10, maintain their own height flatness and effectively absorb and offset the thermal expansion stress transmitted from the upper layer, thereby preventing destructive stress from acting directly on the furnace trolley. In addition, in terms of thermal efficiency, the hollow holes 7 inside the upper layer dividing pad 4 reduce its overall heat storage, while the V-shaped heat conduction groove 5 at the bottom increases the heat exchange area, which together accelerates the heating and cooling response speed of the device. Through the double-layer structure to isolate stress, sliding guide to control deformation, and reinforced structure to ensure support, effective management of thermal deformation is achieved, thereby protecting the integrity of the trolley structure and achieving energy-saving effect.

[0035] Reference Figures 1-4 The upper dividing pad 4 is provided with a compound layer 8 on its exterior; the upper dividing pad 4 is slidably connected to the upper side of the lower plate 1; two first reinforcing ribs 9 are fixedly connected to second reinforcing ribs 10, together forming a grid-like or mesh-like reinforcing structure, forming multiple cavities at the bottom of the lower plate 1; multiple upper dividing pads 4 are laid side by side on the lower plate 1, and an expansion gap is left between two adjacent upper dividing pads 4 to accommodate their independent thermal expansion and contraction; the protrusions 2 and the grooves 3 have a pre-set thermal expansion gap between their two ends in the sliding direction, allowing the upper dividing pads 4 to freely expand and contract in the sliding direction when heated, thereby absorbing thermal expansion. Stress is guided to a controllable direction; the compound layer 8 is a nitrided layer formed by surface nitriding or carbonitriding processes, which improves the surface hardness, wear resistance and high-temperature adhesion of the upper dividing pad 4 and the inner wall of the groove 3; the V-shaped heat conduction groove 5, the U-shaped pressure relief groove 6 and the hollow hole 7 work together to construct the upper dividing pad 4 into a lightweight, high heat exchange efficiency and a load-bearing unit with self-adjusting internal stress; among them, the hollow hole 7 is used to reduce its own weight and reduce heat storage, the V-shaped heat conduction groove 5 is used to guide heat flow and increase the lower heat exchange area, and the U-shaped pressure relief groove 6 is used to provide a micro-buffer space for the thermal expansion of the upper surface.

[0036] A compound layer 8 is provided on the outside of the upper segmented shims 4. This layer acts as a physical barrier, effectively improving the surface hardness and wear resistance of the shims, and enhancing their resistance to high-temperature oxidation and chemical corrosion. Multiple surface-strengthened upper segmented shims 4 are installed on the upper side of the lower plate 1 in a sliding connection, ensuring that the two can both transfer loads and move relative to each other. Two first reinforcing ribs 9 are fixedly connected to second reinforcing ribs 10, forming a grid-like or mesh-like reinforcing structure. Multiple cavities are formed at the bottom of the lower plate 1. This layout not only greatly improves the bending resistance of the lower plate 1, but the multiple closed cavities formed at the bottom also constitute an air insulation layer, effectively slowing down the heat conduction to the furnace trolley below. Multiple upper segmented shims 4 are laid side by side on the lower plate 1, with expansion gaps between adjacent upper segmented shims 4 to accommodate their independent thermal expansion and contraction. These gaps provide free space for thermal expansion and contraction for each independent shim unit, thereby avoiding mutual compression and stress accumulation between units. The upper dividing pad 4 has a pre-set thermal expansion gap between the protrusion 2 and the groove 3 at both ends in the sliding direction, allowing it to freely expand and contract in the sliding direction when heated. This guides the thermal expansion stress to a controllable direction, ensuring that the upper dividing pad 4 still has sufficient travel space to expand and contract freely when heated to its maximum expansion amount, thus completely constraining and guiding the thermal expansion stress to a controllable direction. The compound layer 8 is a nitrided layer formed by surface nitriding or carbonitriding processes. This nitrided layer improves the performance of the upper dividing pad 4 and the groove 3. The improved surface hardness, wear resistance, and high-temperature adhesion of the wall significantly enhance the surface hardness, wear resistance, and high-temperature adhesion of the sliding contact surface, ensuring reliability during long-term reciprocating motion. The geometric design of the upper segmented pad 4 itself embodies a high degree of integration: the V-shaped heat-conducting groove 5 at the bottom, the U-shaped pressure-relieving groove 6 at the top, and the internal perforated holes 7 are not isolated entities, but rather work together to construct each upper segmented pad 4 as a lightweight, high-heat-exchange-efficiency, and stress-self-regulating load-bearing unit. The core function of the perforated holes 7 is to reduce weight and heat storage; the V-shaped heat-conducting groove 5 improves heat exchange efficiency by guiding heat flow and increasing the lower heat exchange area; and the U-shaped pressure-relieving groove 6 provides a microscopic buffer space for thermal expansion of the upper surface, giving the pad the ability to self-regulate internal stress.

[0037] Working Principle: When using this device, the workpiece to be processed is placed on the top surface of the upper dividing shim 4. Under the high temperature inside the furnace, the shim expands due to heat. To cope with this expansion, multiple structures work together: the U-shaped pressure relief groove 6 on the top surface provides a micro-buffer space for the material surface, releasing local thermal stress; the overall macroscopic extension is constrained by the sliding guide structure formed by the protrusions 2 of the lower plate 1 and the grooves 3 of the upper dividing shim 4, allowing it to proceed in an orderly manner along a preset single direction; the entire load of the upper dividing shim 4 and the workpiece is transmitted through the lower plate 1, which is supported by the first reinforcing rib 9 at the bottom and the second... The reinforcing ribs 10 maintain their own height flatness and effectively absorb and offset the thermal expansion stress transmitted from the upper layer, thereby preventing destructive stress from acting directly on the furnace trolley. In terms of thermal efficiency, the hollow holes 7 inside the upper layer dividing pad 4 reduce its overall heat storage, while the V-shaped heat conduction grooves 5 at the bottom increase the heat exchange area, jointly accelerating the heating and cooling response speed of the device. Through the double-layer structure to isolate stress, sliding guide to control deformation, and reinforced structure to ensure support, effective management of thermal deformation is achieved, thereby protecting the integrity of the trolley structure and achieving energy-saving effect.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double-layer structure anti-deformation energy-saving annealing furnace pad, comprising a lower plate (1), characterized in that, The lower plate (1) has protrusions (2) fixedly connected to both sides of its upper part. The protrusions (2) are slidably connected inside the grooves (3). The grooves (3) are set on both sides of the lower part of the upper dividing pad (4). The lower side of the upper dividing pad (4) is provided with a V-shaped heat conduction groove (5). The upper side of the upper dividing pad (4) is provided with a U-shaped pressure relief groove (6). The interior of the upper dividing pad (4) is provided with evenly distributed hollow holes (7). The lower sides of the lower plate (1) are fixedly connected with reinforcing components. The reinforcing components greatly improve the bending resistance of the lower plate (1).

2. The double-layer structure anti-deformation energy-saving annealing furnace pad according to claim 1, characterized in that: The reinforcing component includes a first reinforcing rib (9), which is fixedly connected to the lower two sides of the lower plate (1), and a second reinforcing rib (10) is fixedly connected to both lower two sides of the lower plate (1).

3. The double-layer structure anti-deformation energy-saving annealing furnace pad according to claim 1, characterized in that: The upper dividing pad (4) is provided with a compound layer (8) on its exterior.

4. The double-layer structure anti-deformation energy-saving annealing furnace pad according to claim 1, characterized in that: The upper dividing pad (4) is slidably connected to the upper side of the lower plate (1).

5. The double-layer structure anti-deformation energy-saving annealing furnace pad according to claim 2, characterized in that: The two first reinforcing ribs (9) are fixedly connected to the second reinforcing ribs (10), together forming a grid-shaped or mesh-like reinforcing structure, forming multiple cavities at the bottom of the lower plate (1).

6. The double-layer structure anti-deformation energy-saving annealing furnace pad according to claim 1, characterized in that: Multiple upper layer dividing pads (4) are laid side by side on the lower layer plate (1), and an expansion gap is left between two adjacent upper layer dividing pads (4) to accommodate their independent thermal expansion and contraction.

7. The double-layer structure anti-deformation energy-saving annealing furnace pad according to claim 1, characterized in that: The protrusion (2) and the groove (3) are provided with a thermal expansion gap at both ends in the sliding direction, which allows the upper dividing pad (4) to freely expand and contract in the sliding direction when heated, thereby guiding the thermal expansion stress to a controllable direction.

8. The double-layer structure anti-deformation energy-saving annealing furnace pad according to claim 3, characterized in that: The compound layer (8) is a nitrided layer formed by surface nitriding or carbonitriding process. The nitrided layer improves the surface hardness, wear resistance and high temperature adhesion of the upper dividing pad (4) and the inner wall of the groove (3).

9. The double-layer structure anti-deformation energy-saving annealing furnace pad according to claim 1, characterized in that: The V-shaped heat conduction groove (5), U-shaped pressure relief groove (6), and hollow hole (7) work together to construct the upper layer segmented pad (4) into a lightweight, high heat exchange efficiency and self-adjusting internal stress load-bearing unit. The hollow hole (7) is used to reduce its own weight and reduce heat storage. The V-shaped heat conduction groove (5) is used to guide heat flow and increase the lower heat exchange area. The U-shaped pressure relief groove (6) is used to provide a micro-buffer space for the thermal expansion of the upper surface.

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