A graphite electrode for electric arc furnace capable of preheating

Abstract

The present invention discloses a graphite electrode for an electric arc furnace that can be preheated, comprising a support frame, a driving motor, a graphite electrode body and an electrode head, wherein the driving motor is fixed by bolts on the upper part of the support frame, and the graphite electrode body is arranged on the right side of the support frame, and the electrode head is embedded in the lower end of the graphite electrode body, a first limiting plate is arranged on the left side of the lower end of the graphite electrode body, and a second limiting plate is arranged on the right side of the first limiting plate, and a third limiting plate is arranged above the first limiting plate, and a fourth limiting plate is arranged on the right side of the third limiting plate. The graphite electrode for an electric arc furnace that can be preheated is provided with a heating wire, and after the limiting plate fixes the graphite electrode body, the graphite electrode can be preheated by the heating wire, so that the graphite electrode body has a certain initial temperature, thereby avoiding damage to the inside of the graphite electrode body due to a large temperature difference in the future, and improving the service life of the device.

Description

Technical Field

[0001] The invention relates to the technical field of graphite electrodes, in particular to a graphite electrode for an electric arc furnace which can be subjected to a preheating treatment. Background Art

[0002] Graphite electrode is a common conductor. Its production process is simpler than that of metal electrode. In an electric arc furnace, the conductivity of graphite electrode can release electric energy in the form of arc to heat and melt the charge. However, the existing graphite electrode still has some shortcomings when used:

[0003] 1. The existing graphite electrode has a relatively complex installation and fixing structure, which is time-consuming and labor-intensive to install and remove. In addition, the height of the graphite electrode is not easy to adjust after installation, and it is not easy to flexibly control its position, which reduces the convenience of using the device;

[0004] 2. Existing graphite electrodes do not have their own preheating function. When in use, due to the high instantaneous temperature, a large temperature difference will be generated in the graphite electrode when the temperature rises rapidly, and the internal structure is easily damaged, resulting in a decrease in the subsequent service life of the graphite electrode.

[0005] In view of the above problems, it is urgent to carry out innovative design based on the original graphite electrode. Summary of the invention

[0006] The object of the present invention is to provide a graphite electrode for an electric arc furnace that can be preheated, so as to solve the problems raised in the above background technology that the existing graphite electrodes on the market have a relatively complex installation and fixing structure, the installation and disassembly of the graphite electrodes are time-consuming and labor-intensive, the height of the graphite electrodes is not easy to adjust after installation, and the existing graphite electrodes do not have their own preheating function.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a graphite electrode for an electric arc furnace that can be preheated, comprising a support frame, a drive motor, a graphite electrode body and an electrode head, wherein the drive motor is bolted to the upper side of the support frame, and the graphite electrode body is arranged on the right side of the support frame, and the electrode head is embedded in the lower end of the graphite electrode body, a first limiting plate is arranged on the left side of the lower end of the graphite electrode body, and a second limiting plate is arranged on the right side of the first limiting plate, and a third limiting plate is arranged above the first limiting plate, and a fourth limiting plate is arranged on the right side of the third limiting plate, The inner surfaces of the fourth limit plate, the third limit plate, the second limit plate and the first limit plate are all inlaid with heating wires, the first limit plate is inlaid with a first connecting plate above, and the first connecting plate is connected to the third limit plate above, the second limit plate is inlaid with a second connecting plate above, and the second connecting plate is connected to the fourth limit plate above, and a fastening rod passes through the middle of the second connecting plate, a limit rod is arranged on the rear side of the fastening rod, a support plate is inlaid on the left side of the third limit plate, and a threaded rod is arranged on the left side of the support plate, and the threaded rod bearing is installed inside the support frame.

[0008] Preferably, the first limiting plate and the second limiting plate are disposed symmetrically about the center line of the graphite electrode body, and the main cross-sections of the first limiting plate and the second limiting plate are both designed as an "L"-shaped structure.

[0009] Preferably, the third limiting plate and the fourth limiting plate are symmetrically arranged with the first limiting plate and the second limiting plate about the center line of the graphite electrode body, and the top view cross section of the third limiting plate is designed to be an arc-shaped structure.

[0010] Preferably, the first connecting plate and the second connecting plate are symmetrically arranged front and back about the center line of the graphite electrode body, and the first connecting plate and the first limiting plate and the third limiting plate form an integrated structure, and the second connecting plate and the second limiting plate and the fourth limiting plate form an integrated structure.

[0011] Preferably, a through opening is provided inside the second connecting plate, and a nested connection is formed between the through opening and the limiting rod, and a threaded connection is formed between the second connecting plate and the fastening rod, and a bearing connection is formed between the fastening rod and the first connecting plate.

[0012] Preferably, a movable block is embedded on the left side of the support plate, and a threaded connection is formed between the movable block and the threaded rod, and an up-and-down sliding structure is formed between the movable block and the support frame.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the graphite electrode for an electric arc furnace that can be preheated;

[0014] (1) A first connecting plate, a second connecting plate and a fastening rod are provided, and the spacing between the first connecting plate and the second connecting plate can be adjusted by rotating the fastening rod, so as to control the position of the limit plate, which is convenient for fixing the graphite electrode body. The same is true when disassembling, and the operation is convenient. The stability of the graphite electrode body is high. At the same time, the height position of the graphite electrode body can be adjusted by rotating the threaded rod, which is convenient for use in different working environments, thereby improving the convenience of use of the device;

[0015] (2) A heating wire is provided. After the limiting plate fixes the graphite electrode body, the graphite electrode can be preheated by the heating wire so that the graphite electrode body has a certain initial temperature, thereby avoiding subsequent damage to the inside of the graphite electrode body due to large temperature differences and improving the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the front view structure of the first limiting plate of the present invention;

[0018] Figure 3 It is a schematic diagram of the top-sectional structure of the third limiting plate of the present invention;

[0019] Figure 4 It is a schematic diagram of the top-sectional structure of the movable block of the present invention.

[0020] In the figure: 1. support frame; 2. drive motor; 3. graphite electrode body; 4. electrode head; 5. first limit plate; 6. second limit plate; 7. third limit plate; 8. fourth limit plate; 9. heating wire; 10. first connecting plate; 11. second connecting plate; 1101. through port; 12. fastening rod; 13. limit rod; 14. support plate; 1401. movable block; 15. threaded rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-4The present invention provides a technical solution: a graphite electrode for an electric arc furnace that can be preheated, comprising a support frame 1, a drive motor 2, a graphite electrode body 3, an electrode head 4, a first limit plate 5, a second limit plate 6, a third limit plate 7, a fourth limit plate 8, an electric heating wire 9, a first connecting plate 10, a second connecting plate 11, a fastening rod 12, a limit rod 13, a support plate 14 and a threaded rod 15, the drive motor 2 is fixed to the upper bolt of the support frame 1, and the graphite electrode body 3 is arranged on the right side of the support frame 1, and the electrode head 4 is embedded in the lower end of the graphite electrode body 3, the first limit plate 5 is arranged on the left side of the lower end of the graphite electrode body 3, and the second limit plate 6 is arranged on the right side of the first limit plate 5, and the third limit plate 7 is arranged above the first limit plate 5. Three limiting plates 7, a fourth limiting plate 8 is arranged on the right side of the third limiting plate 7, and the inner surfaces of the fourth limiting plate 8, the third limiting plate 7, the second limiting plate 6 and the first limiting plate 5 are all inlaid with electric heating wires 9, a first connecting plate 10 is inlaid on the top of the first limiting plate 5, and the top of the first connecting plate 10 is connected to the third limiting plate 7, a second connecting plate 11 is inlaid on the top of the second limiting plate 6, and the top of the second connecting plate 11 is connected to the fourth limiting plate 8, and a fastening rod 12 runs through the middle of the second connecting plate 11, and a limiting rod 13 is arranged on the rear side of the fastening rod 12, a supporting plate 14 is inlaid on the left side of the third limiting plate 7, and a threaded rod 15 is arranged on the left side of the supporting plate 14, and the bearing of the threaded rod 15 is installed inside the supporting frame 1;

[0023] The first limiting plate 5 and the second limiting plate 6 are arranged symmetrically about the center line of the graphite electrode body 3, and the main cross-sections of the first limiting plate 5 and the second limiting plate 6 are both designed in an "L" shape. The above structural design can support and limit the bottom of the graphite electrode body 3 through the first limiting plate 5 and the second limiting plate 6, so that the graphite electrode body 3 can maintain good stability later;

[0024] The third limiting plate 7 and the fourth limiting plate 8 are symmetrically arranged with the first limiting plate 5 and the second limiting plate 6 about the center line of the graphite electrode body 3, and the top view cross section of the third limiting plate 7 is an arc-shaped structure design. The above structural design can limit the upper end of the graphite electrode body 3 by the third limiting plate 7 and the fourth limiting plate 8, and cooperate with the first limiting plate 5 and the second limiting plate 6 to effectively fix the graphite electrode body 3;

[0025] The first connecting plate 10 and the second connecting plate 11 are both symmetrically arranged front and back about the center line of the graphite electrode body 3, and the first connecting plate 10 and the first limiting plate 5 and the third limiting plate 7 form an integrated structure, and the second connecting plate 11 and the second limiting plate 6 and the fourth limiting plate 8 form an integrated structure. The above structural design enables the subsequent first limiting plate 5 and the third limiting plate 7 to maintain synchronous movement under the action of the first connecting plate 10, so as to facilitate the fixing of the subsequent graphite electrode body 3;

[0026] The second connecting plate 11 has a through hole 1101 formed inside, and the through hole 1101 and the limiting rod 13 are nested, and the second connecting plate 11 and the fastening rod 12 are threadedly connected, and the fastening rod 12 and the first connecting plate 10 are bearing-connected. The above structural design can drive the second connecting plate 11 to move closer to the first connecting plate 10 through the rotation of the fastening rod 12, so as to fix the graphite electrode body 3;

[0027] A movable block 1401 is embedded on the left side of the support plate 14, and a threaded connection is formed between the movable block 1401 and the threaded rod 15, and an up and down sliding structure is formed between the movable block 1401 and the support frame 1. The above structural design can drive the support plate 14 to move by the movement of the movable block 1401, thereby adjusting the height position of the graphite electrode body 3.

[0028] Working principle: When using the graphite electrode for electric arc furnace that can be preheated, first, according to Figure 1 As shown, when the height position of the graphite electrode body 3 needs to be adjusted, the driving motor 2 can be started to drive the threaded rod 15 to rotate. Figure 4 As shown, the threaded rod 15 drives the movable block 1401 to move through the threaded connection between the movable block 1401 and the threaded rod 15 while rotating, so that the movable block 1401 drives the third limiting plate 7 to move through the support plate 14. Figure 2 and Figure 3 As shown, the third limiting plate 7 will drive the graphite electrode body 3 to move when moving, so as to adjust the upper and lower positions of the graphite electrode body 3 and increase the flexibility of the device;

[0029] When the graphite electrode body 3 needs to be disassembled or fixed, the fastening rod 12 is rotated to make the fastening rod 12 drive the second connecting plate 11 to move, thereby adjusting the distance between the first connecting plate 10 and the second connecting plate 11, and at the same time, the limiting rod 13 slides in the through opening 1101, so that the first limiting plate 5, the second limiting plate 6, the third limiting plate 7 and the fourth limiting plate 8 release the fixation of the graphite electrode body 3, and it can be disassembled. The same is true when installing and fixing. The stability of the graphite electrode body 3 after fixation can be ensured by the mutual cooperation between the first limiting plate 5, the second limiting plate 6, the third limiting plate 7 and the fourth limiting plate 8. The operation is simple and convenient. At the same time, the graphite electrode body 3 can be preheated by the heating wire 9 before use to avoid subsequent damage to the inside of the graphite electrode body 3 due to large temperature differences, thereby improving the service life of the device.

[0030] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A graphite electrode for an electric arc furnace that can be subjected to a preheating treatment, comprising a support frame (1), a drive motor (2), a graphite electrode body (3) and an electrode head (4), characterized in that: A driving motor (2) is bolted to the upper side of the support frame (1), and a graphite electrode body (3) is arranged on the right side of the support frame (1), and an electrode head (4) is embedded in the lower end of the graphite electrode body (3), a first limiting plate (5) is arranged on the left side of the lower end of the graphite electrode body (3), and a second limiting plate (6) is arranged on the right side of the first limiting plate (5), and a third limiting plate (7) is arranged above the first limiting plate (5), and a fourth limiting plate (8) is arranged on the right side of the third limiting plate (7), and the inner surfaces of the fourth limiting plate (8), the third limiting plate (7), the second limiting plate (6) and the first limiting plate (5) are all embedded with electric heating wires (9 ), a first connecting plate (10) is inlaid on the top of the first limiting plate (5), and the top of the first connecting plate (10) is connected to the third limiting plate (7), a second connecting plate (11) is inlaid on the top of the second limiting plate (6), and the top of the second connecting plate (11) is connected to the fourth limiting plate (8), and a fastening rod (12) passes through the middle of the second connecting plate (11), and a limiting rod (13) is arranged on the rear side of the fastening rod (12), a supporting plate (14) is inlaid on the left side of the third limiting plate (7), and a threaded rod (15) is arranged on the left side of the supporting plate (14), and a bearing of the threaded rod (15) is installed inside the supporting frame (1); The first limiting plate (5) and the second limiting plate (6) are arranged symmetrically with respect to the center line of the graphite electrode body (3), and the main cross-sections of the first limiting plate (5) and the second limiting plate (6) are both designed to be "L"-shaped; The third limiting plate (7) and the fourth limiting plate (8) are symmetrically arranged with the first limiting plate (5) and the second limiting plate (6) about the center line of the graphite electrode body (3) in the vertical direction, and the top view cross section of the third limiting plate (7) is designed to be in the shape of an arc.

2. The graphite electrode for an electric arc furnace that can be preheated according to claim 1, characterized in that: The first connecting plate (10) and the second connecting plate (11) are both arranged symmetrically front and rearward about the center line of the graphite electrode body (3), and the first connecting plate (10) and the first limiting plate (5) and the third limiting plate (7) form an integrated structure, and the second connecting plate (11) and the second limiting plate (6) and the fourth limiting plate (8) form an integrated structure.

3. The graphite electrode for an electric arc furnace that can be preheated according to claim 1, characterized in that: The second connecting plate (11) is provided with a through opening (1101) therein, and a nested connection is formed between the through opening (1101) and the limiting rod (13), and a threaded connection is formed between the second connecting plate (11) and the fastening rod (12), while a bearing connection is formed between the fastening rod (12) and the first connecting plate (10).

4. The graphite electrode for an electric arc furnace that can be preheated according to claim 1, characterized in that: A movable block (1401) is embedded on the left side of the support plate (14), a threaded connection is formed between the movable block (1401) and the threaded rod (15), and an up-and-down sliding structure is formed between the movable block (1401) and the support frame (1).

5. The graphite electrode for an electric arc furnace capable of being preheated according to claim 1, characterized in that: The working principle of the graphite electrode for an electric arc furnace that can be preheated is as follows: when using the graphite electrode for an electric arc furnace that can be preheated, first, when the height position of the graphite electrode body (3) needs to be adjusted, the drive motor (2) is started to drive the threaded rod (15) to rotate. While the threaded rod (15) is rotating, it drives the movable block (1401) to move through the threaded connection between the threaded rod and the movable block (1401), so that the movable block (1401) drives the third limiting plate (7) to move through the support plate (14). When the third limiting plate (7) moves, it drives the graphite electrode body (3) to move, thereby adjusting the upper and lower positions of the graphite electrode body (3) and increasing the flexibility of the device; When the graphite electrode body (3) needs to be disassembled or fixed, the fastening rod (12) is rotated so that the fastening rod (12) drives the second connecting plate (11) to move, thereby adjusting the spacing between the first connecting plate (10) and the second connecting plate (11). At the same time, the limiting rod (13) slides in the through hole (1101) so that the first limiting plate (5), the second limiting plate (6), the third limiting plate (7) and the fourth limiting plate (8) release the fixing of the graphite electrode body (3) and disassemble it. The same is true when installing and fixing. The stability of the graphite electrode body (3) after fixing is ensured by the mutual cooperation between the first limiting plate (5), the second limiting plate (6), the third limiting plate (7) and the fourth limiting plate (8). The operation is simple and convenient. At the same time, the graphite electrode body (3) is preheated by the electric heating wire (9) before use, thereby avoiding damage to the inside of the graphite electrode body (3) due to a large temperature difference in the future, thereby improving the service life of the device.

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