A furnace bottom structure of a direct current arc furnace which is easy to disassemble

Abstract

The utility model provides a kind of furnace bottom structure of direct current electric arc furnace convenient to disassemble, it is related to direct current electric arc furnace technical field.The furnace bottom structure of direct current electric arc furnace convenient to disassemble includes support base, heat insulation base, magnesium carbon conducting base and compression assembly.Magnesium carbon conducting base is detachably set in the inner side of heat insulation base;The central portion of the top of magnesium carbon conducting base is concave, to form the spherical space of open top;Spherical space is used to accommodate smelting material;Compression assembly is provided with multiple groups;Each compression assembly is distributed on the circumference of magnesium carbon conducting base, and is hinged to the outer peripheral wall of support base;One end of each compression assembly is crimped to the top of magnesium carbon conducting base, and the other end is abutted to the outer side of support base.The utility model is set through compression assembly, simplifies the process of installation and disassembly, can also maintain good performance under high temperature environment, and significantly reduces the complexity of manufacturing process.

Description

Technical Field

[0001] This utility model belongs to the technical field of DC electric arc furnaces, and in particular relates to a furnace bottom structure of a DC electric arc furnace that is easy to disassemble. Background Technology

[0002] A direct current (DC) electric arc furnace is an electric arc furnace that uses direct current (DC) as its energy source. It generates heat through an electric arc between electrodes and the furnace charge (or molten pool) to achieve the purpose of melting. This type of furnace is suitable for melting steel, alloys, and non-ferrous metals. However, consumable parts in a DC electric arc furnace, such as the magnesium-carbon conductive base, will gradually wear down and thin over time, thus requiring periodic disassembly.

[0003] In existing technologies, detachable magnesium-carbon conductive bases typically employ a connection method using screws and knobs to prevent loosening during normal use and to facilitate disassembly. However, this design has some drawbacks: firstly, the installation process of tightening each screw individually is inefficient; secondly, in high-temperature environments, the threaded rod and threaded hole are prone to deformation due to thermal expansion, making them impossible to unscrew; furthermore, the machining process for the threaded connection hole is relatively complex. Utility Model Content

[0004] In view of this, the present invention provides a furnace bottom structure for a DC electric arc furnace that is easy to disassemble, in order to solve the problems of low disassembly efficiency of magnesium-carbon conductive base, easy deformation of threaded connection under high temperature environment and complicated processing in the prior art.

[0005] The technical solution of this utility model is implemented as follows:

[0006] This utility model provides a furnace bottom structure for a DC electric arc furnace that is easy to disassemble, comprising: a support base with an open-top receiving cavity formed inside; a heat-insulating base disposed on the inner wall of the receiving cavity; a magnesium-carbon conductive base detachably disposed on the inner side of the heat-insulating base; the central portion of the top of the magnesium-carbon conductive base is recessed to form an open-top spherical space; the spherical space is used to accommodate the material to be smelted; and multiple sets of clamping components; each clamping component is distributed circumferentially on the magnesium-carbon conductive base and hinged to the outer peripheral wall of the support base; one end of each clamping component is pressed against the top of the magnesium-carbon conductive base, and the other end abuts against the outer side of the support base.

[0007] In one embodiment, the clamping assembly includes: a lever, comprising a lever body and a first end and a second end connected to both ends of the lever body; the first end is pressed against the top surface of the magnesium-carbon conductive base; a locking block is engaged between the second end of the lever and the support base; wherein the lever body is hinged to the outside of the support base.

[0008] In one embodiment, the top surface of the magnesium-carbon conductive base includes a spherical surface of the spherical space and a first surface surrounding the spherical surface; the first end of the lever extends from the end of the lever body toward the magnesium-carbon conductive base and forms a downward-opening arc structure; the first end of the lever is pressed against the first surface.

[0009] In one embodiment, the first end of the lever, which is used to press against the end face of the first surface, has a rounded corner.

[0010] In one embodiment, the second end is formed with a slot, the opening of which faces the support base; the locking block is engaged in the slot.

[0011] In one embodiment, the locking block is a wedge block, which engages with the locking groove.

[0012] In one embodiment, a stepped surface is formed on one side of the wedge that abuts against the slot, and the stepped surface faces the small end of the wedge.

[0013] In one embodiment, the outer peripheral wall of the support base is provided with a hinge frame, and the top end of the hinge frame is provided with a hinge shaft; the lever body is sleeved on the hinge shaft and can rotate around the hinge shaft relative to the magnesium-carbon conductive base.

[0014] In one embodiment, the hinge frame includes two hinge ears spaced apart circumferentially around the magnesium-carbon conductive base, and the top end of the hinge ears is provided with a through hole; the hinge shaft includes a pivot section and an abutment section connected to the pivot section, the pivot section is sequentially inserted through the through holes of the two hinge ears, and the abutment section abuts against the outside of the hinge ears.

[0015] In one embodiment, multiple sets of the clamping components are uniformly arranged along the circumference of the magnesium-carbon conductive base.

[0016] This embodiment of the invention improves the overall stability and reliability of the furnace bottom structure through the inclusion of a clamping assembly. The clamping assembly not only simplifies the installation and disassembly process but also maintains good performance under high-temperature conditions, preventing connection failures due to thermal expansion. The clamping assembly securely fixes the magnesium-carbon conductive base while ensuring quick release when replacement or maintenance is required. Furthermore, this design significantly reduces the complexity of the manufacturing process, decreases processing time and costs, thereby improving overall production efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the overall structure of an embodiment of the furnace bottom structure provided by this utility model;

[0019] Figure 2 for Figure 1 Overall sectional view;

[0020] Figure 3 for Figure 1 A schematic diagram of the lever structure.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Support base; 2. Insulated base; 21. Hinge frame; 211. Hinge ear; 22. Hinge shaft; 3. Magnesium-carbon conductive base; 31. Spherical space; 32. Top surface; 321. Spherical surface; 322. First surface; 4. Clamping assembly; 41. Lever; 411. Lever body; 412. First end; 413. Second end; 4131. Slot; 42. Block; 421. Wedge; 4211. Step surface. Detailed Implementation

[0023] 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 scope of protection of the present utility model.

[0024] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0025] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0026] A direct current (DC) electric arc furnace is an electric arc furnace that uses direct current (DC) as its energy source. It generates heat through an electric arc between electrodes and the furnace charge (or molten pool) to achieve the purpose of melting. This type of furnace is suitable for melting steel, alloys, and non-ferrous metals. However, consumable parts in a DC electric arc furnace, such as the magnesium-carbon conductive base, will gradually wear down and thin over time, thus requiring periodic disassembly.

[0027] In existing technologies, detachable magnesium-carbon conductive bases typically employ a connection method using screws and knobs to prevent loosening during normal use and to facilitate disassembly. However, this design has some drawbacks: firstly, the installation process of tightening each screw individually is inefficient; secondly, in high-temperature environments, the threaded rod and threaded hole are prone to deformation due to thermal expansion, making them impossible to unscrew; furthermore, the machining process for the threaded connection hole is relatively complex.

[0028] In view of this, the present invention provides a furnace bottom structure for a DC electric arc furnace that is easy to disassemble, in order to solve the problems of low disassembly efficiency of magnesium-carbon conductive base, easy deformation of threaded connection under high temperature environment and complicated processing in the prior art.

[0029] It is understood that the components of a DC electric arc furnace are not limited to the furnace bottom structure; they also include the cover located above the furnace bottom, and the electrode rods that pass through the cover and form a current loop together with the furnace bottom structure. Therefore, the furnace bottom structure is only one part of the many components of a DC electric arc furnace. The DC electric arc furnace generates high temperatures through arc discharge between the electrode rods and the furnace bottom structure, thereby melting the furnace charge. In this process, the furnace bottom structure not only supports the furnace charge but also needs to possess good electrical conductivity and high-temperature resistance. To improve the service life and ease of disassembly of the magnesium-carbon conductive base 3, this embodiment of the invention optimizes the furnace bottom structure, enabling rapid installation and disassembly without relying on complex threaded connections.

[0030] Please see Figure 1 and Figure 2 The furnace bottom structure includes a support base 1, a heat-insulating base 2, and a magnesium-carbon conductive base 3. The support base 1, as the foundation of the entire structure, has an internal cavity designed to support other components. The heat-insulating base 2, located on the inner wall of the cavity, insulates against heat, protecting the support base 1 from high temperatures. The magnesium-carbon conductive base 3 is detachably installed inside the heat-insulating base 2, with its top center designed as a concave spherical space 31 to accommodate the material to be smelted. The material to be smelted can be various metal raw materials or alloys. The spherical space 31 not only effectively concentrates heat and improves smelting efficiency but also facilitates uniform heating of the material, thus ensuring smelting quality. Furthermore, the detachable design of the magnesium-carbon conductive base 3 allows for replacement after wear or damage.

[0031] Please see Figure 1 and Figure 2 The furnace bottom structure also includes multiple sets of clamping components 4. Each clamping component 4 is distributed circumferentially on the magnesium-carbon conductive base 3 and hinged to the outer peripheral wall of the support base 1. One end of each clamping component 4 is pressed against the top of the magnesium-carbon conductive base 3, and the other end abuts against the outer side of the support base 1. The clamping components 4 can have various structures, such as lever 41 type, spring type, or other structures capable of achieving the clamping function.

[0032] Since the clamping component 4 is pressed onto the top of the magnesium-carbon conductive structure, its design effectively avoids the drawbacks of traditional threaded connections. Specifically, the clamping component 4 does not rely on a complex threaded structure, thus significantly improving the efficiency of disassembly and installation. Furthermore, because its core components do not use threaded connections susceptible to thermal expansion, it exhibits greater stability in high-temperature environments and eliminates the need for complex threaded hole machining.

[0033] This embodiment of the invention improves the overall stability and reliability of the furnace bottom structure through the inclusion of the clamping component 4. The design of the clamping component 4 not only simplifies the installation and disassembly process but also maintains good performance under high-temperature conditions, avoiding connection failures caused by thermal expansion. The clamping component 4 securely fixes the magnesium-carbon conductive base 3 while ensuring quick unlocking when replacement or maintenance is required. Furthermore, this design significantly reduces the complexity of the manufacturing process, decreases processing time and costs, thereby improving overall production efficiency.

[0034] In some embodiments, please refer to Figure 1 and Figure 3To facilitate operation of the clamping assembly 4, the clamping assembly 4 clamps and locks the magnesium-carbon conductive base 3 via a lever 41. Specifically, the clamping assembly 4 includes a lever 41 and a locking block 42. The lever 41 includes a lever body 411 and a first end 412 and a second end 413 connected to both ends of the lever body 411. The lever body 411 is hinged to the outside of the support base 1; and the lever body 411 has a certain length to provide sufficient lever arm to reduce the required clamping force, thus making it easier for workers to install or disassemble. The contact portion between the first end 412 of the lever 41 and the magnesium-carbon conductive base 3 is specially treated to ensure that the magnesium-carbon conductive base 3 is not damaged during the clamping process, while ensuring a good clamping effect. The second end 413 of the lever 41 is connected to the support base 1 via a locking block 42. This connection method is not only stable but also facilitates quick unlocking.

[0035] Please see Figure 1 and Figure 3 In practical operation: when it is necessary to fix the magnesium carbon conductive base 3, simply tap the locking block 42 into the locking groove 4131 to achieve a firm lock; when it is necessary to disassemble, gently tap the locking block 42 to easily remove it and thus unlock it. This design greatly simplifies the operation process, improves work efficiency, and because there is no complicated thread structure, it is not easy for the jamming phenomenon caused by thermal expansion to occur in high temperature environments.

[0036] In some embodiments, please refer to Figure 1 and Figure 3 To avoid interference between the first end 412 and the edge area of ​​the support base 1 during the rotation of the lever 41 around the hinge point, the first end 412 is bent. Specifically, the first end 412 of the lever 41 extends from the end of the lever body 411 toward the magnesium-carbon conductive base 3, forming a downward-opening arc structure. The top surface 32 of the magnesium-carbon conductive base 3 includes a spherical surface 321 of the spherical space 31 and a first surface 322 surrounding the spherical surface 321; the first end 412 of the lever 41 is pressed against the first surface 322.

[0037] Thus, during the rotation of lever 41, the first end 412, being curved, can avoid the tops of the support base 1 and the heat insulation base 2. Whether pressing or releasing the magnesium-carbon conductive base 3, the first end 412 of lever 41 can rotate smoothly above the top of the magnesium-carbon conductive base 3 without being obstructed by other structures.

[0038] This embodiment of the invention further optimizes the ease of operation of the furnace bottom structure by incorporating a bending design at the first end 412 of the lever 41. This design not only ensures the smoothness of the lever 41 during rotation but also effectively avoids operational difficulties caused by structural interference.

[0039] In some embodiments, please refer to Figure 1 and Figure 3 The first end 412 of the lever 41, which is used to press against the end face of the first surface 322, has a rounded corner. This reduces the risk of the first end 412 scratching the magnesium-carbon conductive base 3.

[0040] In some embodiments, in order to facilitate the engagement of the locking block 42 between the second end 413 of the lever 41 and the outer wall surface of the support base 1, a locking groove 4131 is provided at the second end 413 of the lever 41. The opening of the locking groove 4131 faces the support base 1; the locking block 42 is engaged in the locking groove 4131.

[0041] In practical operation: when it is necessary to fix the magnesium carbon conductive base 3, simply insert the locking block 42 into the slot 4131 to complete the locking; when it is necessary to disassemble, simply tap the locking block 42 gently to disengage it from the slot 4131 to release the lock. This design avoids the jamming problem caused by thermal expansion in traditional threaded connections, and significantly improves work efficiency.

[0042] This embodiment of the invention achieves a fast and secure locking effect by providing a slot 4131 at the second end 413 of the lever 41, which works in conjunction with the locking block 42. The design of the slot 4131 not only simplifies the operation process but also improves the reliability of the connection.

[0043] In some embodiments, please refer to Figure 1 and Figure 3 To further enhance the stability of the fit between the slot 4131 and the locking block 42, the inner wall of the slot 4131 is provided with an anti-slip structure. For example, the inner wall of the slot 4131 can be processed into a rough surface or have raised structures added to increase friction, thereby preventing the locking block 42 from loosening under high temperature and vibration conditions. In addition, the outer surface of the locking block 42 can also be made of a wear-resistant material to improve its durability and ensure that it maintains a good locking effect even after long-term use.

[0044] In some embodiments, please refer to Figure 1 The locking block 42 is designed in a wedge shape to facilitate smoother insertion into the slot 4131. The wedge design utilizes the guiding effect of the inclined surface when the locking block 42 is struck, reducing the force required for installation while ensuring a tight fit between the locking block 42 and the inner wall of the slot 4131. This design not only improves ease of operation but also effectively prevents loosening of the connection due to external impact.

[0045] In some embodiments, please refer to Figure 1To further enhance the locking effect between the locking block 42 and the slot 4131, a stepped surface 4211 is formed on the side of the wedge block 421 that abuts against the slot 4131, with the stepped surface 4211 facing the small end of the wedge block 421.

[0046] When the card block 42 is inserted into the card slot 4131, the stepped surface 4211 fits tightly against the inner wall of the card slot 4131, ensuring a more secure locking state.

[0047] This embodiment of the invention, by providing a stepped surface 4211 on one side of the locking block 42, not only enhances the locking effect between the locking block 42 and the slot 4131, but also effectively prevents the locking block 42 from slipping under high temperature or vibration conditions. Furthermore, this design provides clear operational feedback during disassembly, allowing workers to more intuitively determine whether the locking block 42 has completely disengaged from the slot 4131, thereby improving operational accuracy.

[0048] In some embodiments, please refer to Figure 1 To facilitate the application of striking force to the locking block 42, a striking part is provided on the top of the locking block 42. The surface of the striking part is specially treated, such as by adding anti-slip textures or using wear-resistant materials, to improve stability and durability during striking. The striking part allows workers to more easily install or remove the locking block 42, while reducing the risk of damage caused by improper striking.

[0049] In some embodiments, please refer to Figure 1 and Figure 2 The outer peripheral wall of the support base 1 is provided with a hinge frame 21, and the top of the hinge frame 21 is provided with a hinge shaft 22. The lever body 411 is sleeved on the hinge shaft 22 and can rotate around the hinge shaft 22 relative to the magnesium-carbon conductive base 3. In this way, the design of the hinge frame 21 not only provides a stable support point for the lever 41, but also ensures the flexibility and stability of the lever 41 during rotation. With the setting of the hinge shaft 22, the lever 41 can rotate freely within a certain angle range, thereby realizing the effective pressing or releasing operation of the magnesium-carbon conductive base 3.

[0050] Furthermore, reinforcing ribs are provided on the outer peripheral wall of the support base 1. These reinforcing ribs are distributed along the height direction of the support base 1, which can significantly improve the overall rigidity of the support base 1 and avoid deformation caused by long-term exposure to high temperature and pressure.

[0051] In some embodiments, please refer to Figure 1 and Figure 2The hinge frame 21 includes two hinge ears 211 spaced apart circumferentially around the magnesium-carbon conductive base 3, with through holes at the top of each hinge ear 211. The hinge shaft 22 includes a rotating shaft section and an abutment section connected to the rotating shaft section. The rotating shaft section passes sequentially through the through holes of the two hinge ears 211, and the abutment section abuts against the outer side of the hinge ears 211. This design not only ensures the stability of the hinge shaft 22 but also effectively prevents it from loosening or falling off during use.

[0052] In some embodiments, please refer to Figure 1 and Figure 2 Multiple sets of clamping components 4 are evenly arranged along the circumference of the magnesium-carbon conductive base 3. This design ensures the uniformity of force on the magnesium-carbon conductive base 3, avoiding damage or deformation caused by excessive local force. Through the evenly distributed clamping components 4, the furnace bottom structure can maintain greater stability and reliability under high temperature and high pressure operating environments.

[0053] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A furnace bottom structure for a DC electric arc furnace that is easy to disassemble, characterized in that, include: The supporting base has an internal cavity with an open top. A heat-insulating base is disposed on the inner wall of the receiving cavity; A magnesium-carbon conductive base is detachably disposed inside the heat insulation base; the central portion of the top of the magnesium-carbon conductive base is recessed to form an open spherical space. The spherical space is used to contain the material to be smelted; Multiple sets of clamping components are provided; each clamping component is distributed in the circumferential direction of the magnesium-carbon conductive base and is hinged to the outer peripheral wall of the support base; one end of each clamping component is pressed against the top of the magnesium-carbon conductive base, and the other end abuts against the outer side of the support base.

2. The furnace bottom structure of the easily disassembled DC electric arc furnace according to claim 1, characterized in that, The clamping assembly includes: The lever includes a lever body and a first end and a second end connected to both ends of the lever body; the first end is pressed against the top surface of the magnesium-carbon conductive base. A locking block engages between the second end of the lever and the support base; The lever body is hinged to the outside of the support base.

3. The furnace bottom structure of the easily disassembled DC electric arc furnace according to claim 2, characterized in that, The top surface of the magnesium-carbon conductive base includes a spherical surface of the spherical space and a first surface surrounding the spherical surface; The first end of the lever extends from the end of the lever body toward the magnesium-carbon conductive base, forming a downward-facing arc structure; the first end of the lever is pressed against the first surface.

4. The furnace bottom structure of the easily disassembled DC electric arc furnace according to claim 3, characterized in that, The first end of the lever, which is used to press against the end face of the first surface, has a rounded corner.

5. The furnace bottom structure of the easily disassembled DC electric arc furnace according to claim 2, characterized in that, The second end has a slot, the opening of which faces the support base; the card block is engaged in the slot.

6. The furnace bottom structure of the easily disassembled DC electric arc furnace according to claim 5, characterized in that, The card block is a wedge block, and the wedge block is engaged in the card slot.

7. The furnace bottom structure of the easily disassembled DC electric arc furnace according to claim 6, characterized in that, The wedge has a stepped surface on one side that abuts against the slot, and the stepped surface faces the small end of the wedge.

8. The furnace bottom structure of the easily disassembled DC electric arc furnace according to claim 2, characterized in that, The outer peripheral wall of the support base is provided with a hinge frame, and the top end of the hinge frame is provided with a hinge shaft; the lever body is sleeved on the hinge shaft and can rotate around the hinge shaft relative to the magnesium-carbon conductive base.

9. The furnace bottom structure of the easily disassembled DC electric arc furnace according to claim 8, characterized in that, The hinge frame includes two hinge ears spaced apart around the circumference of the magnesium-carbon conductive base, and the top of the hinge ears is provided with a through hole. The hinge shaft includes a pivot section and an abutment section connected to the pivot section. The pivot section passes through the through holes of the two hinge ears in sequence, and the abutment section abuts against the outside of the hinge ears.

10. The furnace bottom structure of the easily disassembled DC electric arc furnace according to claim 1, characterized in that, Multiple sets of the clamping components are evenly arranged along the circumference of the magnesium-carbon conductive base.

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