A graphite electrode fixing device for an electric arc furnace

Abstract

The utility model discloses a graphite electrode fixing device of arc furnace, including arc furnace top cover, the top fixedly connected with hollow frame of arc furnace top cover, the top of hollow frame is equipped with the T type hand pole of rotating joint with it, the bottom fixedly connected with driving bevel gear of T type hand pole, the driving bevel gear is engaged with three driven bevel gears, every driven bevel gear all is equipped with clamping mechanism, every graphite electrode body's both sides all are equipped with clamping plate, the opposite end of two clamping plates all are fixedly connected with insulating plate, and the central mechanism is equipped between two clamping plates. The utility model discloses single drive source through bevel gear transmission's mode, can drive multiple clamping components synchronous action simultaneously, simplifies the operation process, ensures the even force of electrode in the installation process, avoids the eccentricity of installation due to the uneven clamping force, improves electrode service life and smelting effect.

Description

Technical Field

[0001] This utility model relates to the field of graphite electrode fixing technology, and in particular to a graphite electrode fixing device for an electric arc furnace. Background Technology

[0002] In the electric arc furnace smelting process, graphite electrodes are the core conductive components, and their stable installation is crucial for the efficient operation and production safety of the electric arc furnace.

[0003] Most common graphite electrode fixing devices adopt a single drive or decentralized adjustment method. Some devices rely on independent drive components to control multiple clamping components, which is not only cumbersome to operate, but also difficult to achieve synchronous action of multiple clamping points, resulting in uneven force on the electrode and easy installation eccentricity, which affects the service life of the electrode and the smelting effect. In order to solve the above problems, this application proposes a graphite electrode fixing device for an electric arc furnace. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a graphite electrode fixing device for an electric arc furnace. This device uses a single drive source with bevel gear transmission, which can simultaneously drive multiple clamping components to move synchronously. This simplifies the operation process while ensuring that the electrode is subjected to uniform force during installation, avoiding installation eccentricity caused by uneven clamping force, and improving the service life of the electrode and the smelting effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A graphite electrode fixing device for an electric arc furnace includes a furnace top cover with multiple electrode mounting holes through it. A graphite electrode body is mounted through each electrode mounting hole. A hollow frame is fixedly connected to the top of the furnace top cover. A T-shaped handle is rotatably connected to the top of the hollow frame. A driving bevel gear is fixedly connected to the bottom of the T-shaped handle. The driving bevel gear meshes with three driven bevel gears. Each driven bevel gear is equipped with a clamping mechanism. Clamping plates are provided on both sides of each graphite electrode body. An insulating plate is fixedly connected to the opposite ends of two clamping plates. A centering mechanism is provided between two clamping plates.

[0007] Preferably, the clamping mechanism includes a threaded rod coaxially and fixedly connected to the driven bevel gear. The threaded rod passes through the hollow frame and is rotatably connected to it. A movable column threadedly connected to the outer wall of the threaded rod is sleeved thereon. A first vertical plate is fixedly connected to the top of the electric arc furnace cover. The movable column passes through the first vertical plate and is slidably connected to it. The end of the movable column away from the threaded rod is fixedly connected to a clamping plate. A second vertical plate is fixedly connected to the top of the electric arc furnace cover. A telescopic rod is fixedly connected to the side wall of the second vertical plate. The end of the telescopic rod is fixedly connected to another clamping plate.

[0008] Preferably, the centering mechanism includes two first L-shaped plates fixedly connected to the outer wall of the clamping plate, and two second L-shaped plates fixedly connected to the outer wall of the other clamping plate. Each first L-shaped plate and its corresponding second L-shaped plate are respectively meshed with a rotating gear. The rotating gear is coaxially rotatably connected to a concentric rod, and the bottom of the concentric rod is fixedly connected to the top of the electric arc furnace top cover.

[0009] Preferably, the outer wall of the threaded rod is provided with an external thread, the movable column is provided with a groove, the inner wall of the groove is provided with an internal thread that mates with the external thread, and the cross-section of the movable column is rectangular.

[0010] Preferably, the clamping plate and the insulating plate are arranged in an arc shape, and the end of the insulating plate near the graphite electrode body is provided with anti-slip texture.

[0011] Preferably, the opposite ends of the first L-shaped plate and the second L-shaped plate are provided with a plurality of teeth, and the plurality of teeth cooperate with the rotating gear.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] 1. This device adopts a single drive source through bevel gear transmission, which can drive multiple clamping components to move synchronously at the same time. This simplifies the operation process and ensures that the electrode is subjected to uniform force during installation, avoiding installation eccentricity caused by uneven clamping force, and improving the service life of the electrode and the smelting effect.

[0014] 2. Regarding electrode centering adjustment, the unique centering mechanism, through the linkage of clamping plates and the cooperation of rotating gears, can automatically adjust according to the electrode diameter, quickly and accurately adjusting graphite electrodes of different diameters (500-800mm) to the center position of the installation port. This not only reduces the difficulty of installation, but also effectively avoids safety hazards such as short circuits caused by electrode misalignment, greatly improving the safety and stability of electric arc furnace operation.

[0015] In summary, this device uses a single drive source via bevel gear transmission, which can simultaneously drive multiple clamping components to move synchronously. This simplifies the operation process while ensuring that the electrode is subjected to uniform force during installation, avoiding installation eccentricity caused by uneven clamping force, and improving electrode lifespan and smelting effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a graphite electrode fixing device for an electric arc furnace proposed in this utility model.

[0017] Figure 2 This is a cross-sectional schematic diagram of a graphite electrode fixing device for an electric arc furnace proposed in this utility model.

[0018] Figure 3 for Figure 2 Schematic diagram of the structure at point A in the middle;

[0019] Figure 4 for Figure 2 Schematic diagram of the structure at point B.

[0020] In the figure: 1. Electric arc furnace top cover, 2. Electrode mounting port, 3. Graphite electrode body, 4. Hollow frame, 5. T-shaped hand lever, 6. Driving bevel gear, 7. Driven bevel gear, 8. Threaded rod, 9. Moving column, 10. First upright plate, 11. Clamping plate, 12. Insulating plate, 13. Telescopic rod, 14. Second upright plate, 15. First L-shaped plate, 16. Rotating gear, 17. Second L-shaped plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-4 A graphite electrode fixing device for an electric arc furnace includes an electric arc furnace top cover 1. Multiple electrode mounting ports 2 are provided through the top cover 1. The electrode mounting ports 2 are used to provide mounting channels for graphite electrode bodies 3. Each electrode mounting port 2 is provided with a graphite electrode body 3.

[0023] A hollow frame 4 is fixedly connected to the top of the electric arc furnace top cover 1. A T-shaped lever 5 is rotatably connected to the top of the hollow frame 4. A driving bevel gear 6 is fixedly connected to the bottom of the T-shaped lever 5. The driving bevel gear 6 meshes with three driven bevel gears 7. Each driven bevel gear 7 is equipped with a clamping mechanism. The clamping mechanism includes a threaded rod 8 coaxially fixedly connected to the driven bevel gear 7. The threaded rod 8 passes through the hollow frame 4 and is rotatably connected to it. A movable column 9 is threadedly connected to the outer wall of the threaded rod 8. The movable column 9 moves linearly under the action of the threaded rod 8, which serves to adjust the position of the clamping plate 11. The outer wall of the threaded rod 8 has external threads. The movable column 9 has a groove. The inner wall of the groove has internal threads that mate with the external threads. The cross-section of the movable column 9 is rectangular to prevent the movable column 9 from rotating during movement. A first vertical plate 10 is fixedly connected to the top of the electric arc furnace top cover 1. The movable column 9 passes through the first vertical plate 10 and is slidably connected to it. The first vertical plate 10 guides and limits the movable column 9, ensuring that the movable column 9 moves linearly. The linear column 9 moves stably, with one end of the moving column 9 away from the threaded rod 8 fixedly connected to the clamping plate 11. The movement of the moving column 9 causes the clamping plate 11 to move closer to or further away from the graphite electrode body 3. A second vertical plate 14 is fixedly connected to the top of the electric arc furnace top cover 1. A telescopic rod 13 is fixedly connected to the side wall of the second vertical plate 14. The end of the telescopic rod 13 is fixedly connected to another clamping plate 11. The telescopic rod 13 extends and retracts accordingly when the clamping plate 11 moves, ensuring the stable movement of the clamping plate 11. Each graphite electrode body 3 has clamping plates 11 on both sides. Plate 11 is made of heat-resistant alloy. Insulating plate 12 is fixedly connected to the opposite ends of the two clamping plates 11. The surfaces of clamping plates 11 and insulating plate 12 are coated with wear-resistant ceramic coating. Insulating plate 12 plays an insulating and protective role to prevent conductivity. Insulating plate 12 is made of high-temperature resistant insulating ceramic. Clamping plates 11 and insulating plate 12 are arranged in an arc shape. The arc structure allows clamping plates 11 and insulating plate 12 to better fit the graphite electrode body 3. The end of insulating plate 12 near the graphite electrode body 3 is provided with anti-slip texture. The anti-slip texture increases friction and improves the stability of clamping.

[0024] A centering mechanism is provided between the two clamping plates 11. The centering mechanism includes two first L-shaped plates 15 fixedly connected to the outer wall of the clamping plate 11, and two second L-shaped plates 17 fixedly connected to the outer wall of the other clamping plate 11. Each first L-shaped plate 15 and its corresponding second L-shaped plate 17 are meshed with a rotating gear 16. The rotating gear 16 rotates under the drive of the first L-shaped plate 15 and the second L-shaped plate 17, realizing the synchronous movement of the two clamping plates 11. The opposite ends of the first L-shaped plate 15 and the second L-shaped plate 17 are provided with multiple teeth, which cooperate with the rotating gear 16. The rotating gear 16 is coaxially rotatably connected to a concentric rod, which provides rotational support for the rotating gear 16 and ensures the stable rotation of the rotating gear 16. The bottom of the concentric rod is fixedly connected to the top of the electric arc furnace top cover 1.

[0025] In this invention, when it is necessary to install and fix the graphite electrode body 3, the operator places multiple graphite electrode bodies 3 through the electrode mounting port 2 and positions them at a suitable height. The operator then holds the T-shaped lever 5 and rotates it, causing the driving bevel gear 6, multiple driven bevel gears 7, and the threaded rod 8 to rotate. This causes the three moving columns 9 to move away from each other, moving the clamping plate 11 and insulating plate 12 connected to the moving columns 9 toward the graphite electrode body 3. This movement of the clamping plate 11 then moves the second L-shaped plate 17, thereby... The rotating gear 16 rotates, causing the first L-shaped plate 15 to move, which in turn moves the farthest insulating plate 12 and clamping plate 11 (during which the telescopic rod 13 extends and retracts accordingly). The relative movement of the clamping plate 11 and insulating plate 12 on both sides of the graphite electrode body 3 clamps and fixes the graphite electrode body 3, making it centrally positioned. This ensures that the graphite electrode body 3 is stably installed in the electrode mounting opening 2, guaranteeing the stability of the graphite electrode body 3. Furthermore, this device can clamp and fix graphite electrode bodies 3 of suitable diameter (electrodes with a diameter of 500-800mm).

Claims

1. A graphite electrode fixing device for an electric arc furnace, comprising an electric arc furnace top cover (1), characterized in that, The top cover (1) of the electric arc furnace has multiple electrode mounting ports (2) through it. Each electrode mounting port (2) is provided with a graphite electrode body (3). A hollow frame (4) is fixedly connected to the top of the top cover (1). A T-shaped handle (5) is rotatably connected to the top of the hollow frame (4). A drive bevel gear (6) is fixedly connected to the bottom of the T-shaped handle (5). The drive bevel gear (6) meshes with three driven bevel gears (7). Each driven bevel gear (7) is provided with a clamping mechanism. Each graphite electrode body (3) is provided with a clamping plate (11) on both sides. An insulating plate (12) is fixedly connected to the opposite ends of the two clamping plates (11). A centering mechanism is provided between the two clamping plates (11).

2. The graphite electrode fixing device for an electric arc furnace according to claim 1, characterized in that, The clamping mechanism includes a threaded rod (8) coaxially fixedly connected to the driven bevel gear (7). The threaded rod (8) passes through the hollow frame (4) and is rotatably connected to it. A movable column (9) threadedly connected to the outer wall of the threaded rod (8) is sleeved on it. A first vertical plate (10) is fixedly connected to the top of the electric arc furnace top cover (1). The movable column (9) passes through the first vertical plate (10) and is slidably connected to it. One end of the movable column (9) away from the threaded rod (8) is fixedly connected to the clamping plate (11). A second vertical plate (14) is fixedly connected to the top of the electric arc furnace top cover (1). A telescopic rod (13) is fixedly connected to the side wall of the second vertical plate (14). The end of the telescopic rod (13) is fixedly connected to another clamping plate (11).

3. The graphite electrode fixing device for an electric arc furnace according to claim 1, characterized in that, The centering mechanism includes two first L-shaped plates (15) fixedly connected to the outer wall of the clamping plate (11), and two second L-shaped plates (17) fixedly connected to the outer wall of the other clamping plate (11). Each first L-shaped plate (15) and its corresponding second L-shaped plate (17) are meshed with a rotating gear (16). The rotating gear (16) is coaxially rotatably connected to a concentric rod. The bottom of the concentric rod is fixedly connected to the top of the electric arc furnace top cover (1).

4. The graphite electrode fixing device for an electric arc furnace according to claim 2, characterized in that, The outer wall of the threaded rod (8) is provided with an external thread, the movable column (9) is provided with a groove, the inner wall of the groove is provided with an internal thread that matches the external thread, and the cross-section of the movable column (9) is rectangular.

5. The graphite electrode fixing device for an electric arc furnace according to claim 1, characterized in that, The clamping plate (11) and the insulating plate (12) are arranged in an arc shape, and the insulating plate (12) has anti-slip texture at one end near the graphite electrode body (3).

6. The graphite electrode fixing device for an electric arc furnace according to claim 3, characterized in that, The first L-shaped plate (15) and the second L-shaped plate (17) are provided with multiple teeth at their opposite ends, and the multiple teeth cooperate with the rotating gear (16).

Images