Lining plate for bottom of high-temperature box type electric furnace

Abstract

The utility model discloses a lining plate for a high-temperature box type electric furnace bottom, which comprises a plurality of groups of lining plate bodies, four groups of fixing grooves are arranged on the upper end face of the lining plate bodies, the four groups of fixing grooves are symmetrically arranged in pairs, fixing blocks are slidably connected in two groups of fixing grooves, and screws are in threaded connection with the side walls of the lining plate bodies. The threads extend into the fixing blocks, and the lining plate body is composed of a surface layer, a heat insulation layer and a supporting layer. Through the design of the screws and the fixing blocks, the fixing blocks can be quickly disassembled and assembled. When the fixing blocks are broken or damaged, the fixing blocks can be directly replaced without replacing the whole lining plate body, so that the maintenance time and cost are remarkably reduced, and compared with the situation that the whole lining plate needs to be replaced when the tenon-and-mortise fixing pieces are broken in the traditional modular design, the design greatly reduces the maintenance difficulty and cost, and improves the operation efficiency and economical efficiency of equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of furnace bottom linings, in particular to a lining for a high-temperature box-type electric furnace bottom. Background Art

[0002] In high-temperature box-type electric furnaces and other industrial equipment, linings play a vital role and are usually made of refractory materials such as high-alumina bricks, silicon carbide bricks, zirconia bricks, etc. These materials have excellent high temperature resistance, thermal shock resistance, and chemical erosion resistance.

[0003] At present, when the lining of the bottom of an electric furnace is in use, most of them often adopt a modular design through the lining, that is, it is composed of multiple small linings spliced ​​by mortise and tenon joints, and the side walls of the lining will extend to a certain length of mortise and tenon fixings. Under high temperature conditions, the lining material will undergo thermal expansion and contraction, especially when the temperature changes frequently. This thermal stress will be concentrated on the fixings, causing the fixings to break. When replacing, the entire lining needs to be replaced, which not only increases the difficulty and time of maintenance, but also increases the maintenance cost. Therefore, it is necessary to redesign a lining for the bottom of a high-temperature box-type electric furnace to address the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a lining plate for the bottom of a high-temperature box-type electric furnace.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A lining plate for the bottom of a high-temperature box-type electric furnace comprises a plurality of lining plate bodies, the upper end surfaces of which are provided with four sets of fixing grooves, the four sets of fixing grooves being symmetrically arranged in pairs, wherein two sets of the fixing grooves are slidably connected with fixing blocks, the side walls of the lining plate bodies are threadedly connected with screws, and the threads extend into the interior of the fixing blocks, and the lining plate bodies are composed of a surface layer, a heat insulating layer and a supporting layer.

[0007] Preferably, the inner wall of the fixing groove is T-shaped, the outer wall of the fixing block is H-shaped, and one end of the fixing block fits inside the fixing groove and contacts the inner wall of the fixing groove.

[0008] Preferably, the surface layer is made of a refractory material, the heat insulating layer is located below the surface layer, and the support layer is located below the heat insulating layer and is made of a high-strength support material.

[0009] Preferably, the refractory material of the surface layer is alumina-based ceramics, the thermal insulation material of the thermal insulation layer is ceramic fiber felt, and the supporting material of the supporting layer is high-strength alumina ceramics.

[0010] Preferably, a plurality of groups of reinforcing ribs are provided between the surface layer and the heat insulation layer, and the lining plate body is an integral casting design.

[0011] Preferably, a plurality of thermal expansion joints are provided on the surface layer.

[0012] The utility model has the following beneficial effects:

[0013] 1. The utility model uses the design of screws and fixing blocks to enable the fixing blocks to be quickly disassembled and installed. When the fixing block is broken or damaged, the fixing block can be directly replaced without replacing the entire lining body, thereby significantly reducing maintenance time and cost. Compared with the traditional modular design where the mortise and tenon fixing parts are broken and the entire lining needs to be replaced, this design greatly reduces the maintenance difficulty and cost, and improves the operating efficiency and economy of the equipment.

[0014] 2. The utility model adopts a multi-layer structure design through the lining, including a surface layer, a heat-insulating layer and a supporting layer. The surface layer is made of a material with high refractoriness and low thermal expansion coefficient, which reduces the possibility of thermal stress and cracks; the heat-insulating layer effectively reduces heat conduction and improves the overall thermal isolation effect; the supporting layer provides the necessary mechanical strength and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a lining plate for a high-temperature box-type electric furnace bottom proposed by the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the structure of the middle lining plate body.

[0017] Figure 3 for Figure 2 Exploded diagram.

[0018] In the figure: 1. lining body; 2. fixing groove; 3. fixing block; 4. screw; 5. surface layer; 6. thermal insulation layer; 7. supporting layer. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-3A lining plate for the bottom of a high-temperature box-type electric furnace, comprising a plurality of lining plate bodies 1, the plurality of lining plate bodies 1 have the same appearance, four sets of fixing grooves 2 are provided on the upper end surface of the lining plate body 1, the four sets of fixing grooves 2 are symmetrically arranged in pairs, wherein two sets of fixing grooves 2 are slidably connected with fixing blocks 3, the side wall of the lining plate body 1 is threadedly connected with screws 4, and the threads extend into the inside of the fixing blocks 3, and the lining plate body 1 is composed of a surface layer 5, a heat insulating layer 6 and a supporting layer 7;

[0021] The provided screws 4 can be used for quick disassembly and installation of the fixing block 3. When the fixing block 3 is broken or damaged, there is no need to replace the entire lining body 1. At the same time, the lining body 1 provides a multi-layer structure design, which improves the durability and stability of the lining body 1 in a high temperature environment. The surface layer 5 has high refractoriness and low thermal expansion coefficient, which reduces the possibility of thermal stress and cracks. The thermal insulation layer 6 effectively reduces heat conduction and improves the overall thermal isolation effect. The supporting layer 7 provides the necessary mechanical strength and stability.

[0022] The inner wall of the fixing groove 2 is T-shaped, and the outer wall of the fixing block 3 is H-shaped. One end of the fixing block 3 fits inside the fixing groove 2 and contacts with the inner wall of the fixing groove 2. The surface layer 5 is made of refractory material, and the thermal insulation layer 6 is located below the surface layer 5. The supporting layer 7 is located below the thermal insulation layer 6 and is made of high-strength supporting material. The refractory material of the surface layer 5 is alumina-based ceramic, the thermal insulation material of the thermal insulation layer 6 is ceramic fiber felt, and the supporting material of the supporting layer 7 is high-strength alumina ceramic. A plurality of groups of reinforcing ribs are arranged between the surface layer 5 and the thermal insulation layer 6. The lining body 1 is an integral casting design, and a plurality of thermal expansion joints are arranged on the surface layer 5. The design of the T-shaped fixing groove 2 and the H-shaped fixing block 3 ensures a close fit between the fixing block 3 and the fixing groove 2, enhances the stability of the connection, effectively alleviates the problem of thermal stress concentration, and reduces the risk of breakage of the fixing parts.

[0023] In the utility model, the specific function of the device is as follows: the lining body 1 is placed at the bottom of the electric furnace according to the designed position, the fixing block 3 is slidably connected to the fixing groove 2 to ensure close contact with the inner wall of the fixing groove 2, the fixing block 3 is firmly fixed to the lining body 1 by screws 4, and the threads extend into the inside of the fixing block 3 to ensure stability, and the above steps are repeated to install all the lining bodies 1. If the fixing block 3 is found to be broken or damaged, the fixing block 3 can be quickly disassembled by screws 4 without replacing the entire lining body 1, thereby saving maintenance time and cost;

[0024] The multiple groups of reinforcing ribs arranged between the surface layer 5 and the insulation layer 6 further enhance the strength and heat stress resistance of the structure. The multiple thermal expansion joints on the surface layer 5 allow the material to expand freely at high temperatures, thereby effectively reducing the concentration of thermal stress and the generation of cracks. The multi-layer structure design improves the durability and stability of the lining body 1 in high temperature environments.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lining plate for a high-temperature box-type electric furnace bottom, comprising a plurality of lining plate bodies (1), characterized in that: The multiple groups of lining plate bodies (1) have the same appearance. The upper end surface of the lining plate body (1) is provided with four groups of fixing grooves (2). The four groups of fixing grooves (2) are symmetrically arranged in pairs, and two groups of the fixing grooves (2) are slidably connected with fixing blocks (3). The side walls of the lining plate body (1) are threadedly connected with screws (4), and the threads extend into the interior of the fixing blocks (3). The lining plate body (1) is composed of a surface layer (5), a heat insulation layer (6) and a support layer (7).

2. The lining plate for the bottom of a high-temperature box-type electric furnace according to claim 1, characterized in that: The inner wall of the fixing groove (2) is T-shaped, the outer wall of the fixing block (3) is H-shaped, and one end of the fixing block (3) fits inside the fixing groove (2) and contacts the inner wall of the fixing groove (2).

3. The lining plate for the bottom of a high-temperature box-type electric furnace according to claim 2, characterized in that: The surface layer (5) is made of a refractory material, the heat insulating layer (6) is located below the surface layer (5), and the support layer (7) is located below the heat insulating layer (6) and is made of a high-strength support material.

4. The lining plate for the bottom of a high-temperature box-type electric furnace according to claim 3, characterized in that: The refractory material of the surface layer (5) is alumina-based ceramics, the thermal insulation material of the thermal insulation layer (6) is ceramic fiber felt, and the supporting material of the supporting layer (7) is high-strength alumina ceramics.

5. The lining plate for the bottom of a high-temperature box-type electric furnace according to claim 4, characterized in that: A plurality of groups of reinforcing ribs are provided between the surface layer (5) and the heat insulation layer (6), and the lining plate body (1) is of an integral casting design.

6. The lining plate for the bottom of a high-temperature box-type electric furnace according to claim 5, characterized in that: The surface layer (5) is provided with a plurality of thermal expansion joints.

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