Clamping device and method for continuous electrode of ladle furnace

Abstract

The invention provides a clamping device and method for a continuous electrode of a ladle furnace, belongs to the technical field of smelting, and aims to solve the problem that the continuous electrode of the ladle furnace is low in efficiency. The invention provides a clamping device for a continuous electrode of a ladle furnace. The clamping device comprises a support, a pair of clamping assemblies and a pressure sensor. The support comprises a groove body. The tank body is used for accommodating electrodes. Clamping through holes are symmetrically formed in the groove walls on the two sides of the opening of the groove body. The pair of clamping assemblies is symmetrically arranged on the support. And each clamping assembly can extend into the groove body through one clamping through hole so as to fix the electrode. Each clamping assembly is provided with at least one pressure sensor. The pressure sensor is used for monitoring the clamping force of the clamping assembly on the electrode. The electrode replacement efficiency can be improved, the labor intensity is reduced, and the situation that clamping is too loose or too tight is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of smelting, and in particular relates to a clamping device and method for connecting electrodes of a ladle furnace. Background Art

[0002] The ladle furnace (LF) is an off-site refining facility that utilizes arc heating as its primary technology. The arc heating system utilizes three-phase electrodes (A, B, and C) secured in corresponding three-phase electrode cross-arm holders. The arc generated between the electrodes and the molten steel serves as a heat source to heat the molten steel. Electrodes are consumables, and their consumption increases with heating time. Therefore, they require frequent reconnection in actual production. Electrode reconnection generally occurs offline or online. Offline reconnection requires significant downtime, impacting production continuity. Online reconnection allows new electrodes to be directly attached to the old electrodes without stopping the machine. This is fast, efficient, and uninterrupted, ensuring continuous production. However, online reconnection operates in high ambient temperatures and requires manual tightening of the electrodes, which is labor-intensive and inefficient. Furthermore, the clamping force is inconsistent, making it prone to either being too loose (causing slippage) or too tight (causing damage). Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a clamping device and method for connecting electrodes of a ladle furnace, which can improve the efficiency of electrode replacement, reduce labor intensity, and avoid the situation where the clamping is too loose or too tight.

[0004] To address the aforementioned issues, the present invention provides a clamping device for connecting electrodes in a ladle furnace, comprising: a bracket, a pair of clamping assemblies, and a pressure sensor. The bracket includes a trough body. The trough body is used to accommodate the electrode. Clamping holes are symmetrically arranged on the trough walls on either side of the trough opening. A pair of clamping assemblies are symmetrically arranged on the bracket. Each clamping assembly can extend into the trough body through a clamping hole to secure the electrode. Each clamping assembly is provided with at least one pressure sensor. The pressure sensor is used to monitor the clamping force of the clamping assembly on the electrode.

[0005] The clamping assembly includes a support portion, a drive motor, a transmission mechanism, and a clamping clamp. The support portion is positioned on opposite sides of the trough. The drive motor is mounted on the support portion. The input of the transmission mechanism is connected to the output of the drive motor. The clamping clamp is mounted on the output of the transmission mechanism. The transmission mechanism drives the clamping clamp through the clamping hole and into the trough to clamp the electrode.

[0006] The transmission mechanism comprises a lead screw and a sliding sleeve. The lead screw is connected to the output end of the driving motor. The sliding sleeve is slidably arranged on the support part. An inner thread is arranged on the inner wall of the sliding sleeve. The sliding sleeve is sleeved on the lead screw and is in threaded transmission with the lead screw. The clamping forceps are connected to the sliding sleeve. The driving motor can drive the lead screw to reciprocate, thereby driving the sliding sleeve to move along the lead screw on the support part, so as to drive the clamping forceps to extend into or withdraw from the groove body.

[0007] The clamping forceps comprise a connecting part and a clamping part. The connecting part is mounted on the sliding sleeve. The clamping part is connected to the connecting part. The side of the clamping part away from the connecting part is provided with a clamping angle. The clamping part is clamped on the side wall of the electrode through the clamping angle.

[0008] The pressure sensor is arranged on the side of the clamping part away from the connecting part.

[0009] The support part further comprises a handle. The handle is arranged on the outer side of the groove body.

[0010] The groove body is in a U shape and comprises a first side wall, a bottom plate and a second side wall which are connected in sequence. The handle is located at the side of the first side wall away from the bottom plate, at the connecting position of the first side wall and the bottom plate, at the connecting position of the bottom plate and the second side wall, and at the side of the second side wall away from the bottom plate.

[0011] The clamping device for the electrode of the ladle further comprises a control unit. The control unit is arranged on the support part. The control unit is located on the outer side of the groove body. The control unit is connected to the pressure sensor and the pair of clamping assemblies.

[0012] The control unit comprises a clamping button, a releasing button and an indicator. The clamping button and the releasing button are connected to the pair of clamping assemblies. The indicator is connected to the pressure sensor.

[0013] The application further provides a method for the electrode of the ladle, which utilizes the above-mentioned clamping device for the electrode of the ladle. The method comprises the following steps:

[0014] S1. driving the pair of clamping assemblies to withdraw from the groove body;

[0015] S2. sleeving the groove body on the outer side of the electrode through the opening of the groove body;

[0016] S3. driving the pair of clamping assemblies to extend into the groove body and clamp the electrode;

[0017] S4. rotating the support part to drive the electrode to rotate, so that the electrode is connected to the electrode to be connected through threaded cooperation;

[0018] S5. driving the pair of clamping assemblies to withdraw from the groove body to release the electrode, and taking down the clamping device.

[0019] Advantages:

[0020] The clamping device for connecting electrodes in a ladle furnace provided by the present invention can, when in use, utilize the opening of the trough body to sleeve the trough body on the outer diameter of the electrode, and drive a pair of clamping components to extend into the trough body through the clamping through-hole to clamp the electrode. It is easy to use and does not require manual tightening, which reduces labor intensity and improves work efficiency. A pressure sensor is provided on the clamping component to monitor the clamping pressure to ensure balanced pressure and avoid slipping due to excessive looseness or damage to the electrode due to excessive tightness. When using the clamping device of the present invention to dock electrodes, the electrode can be driven to rotate by rotating the bracket to achieve docking of the new electrode with the old electrode. The operation is convenient and saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a clamping device for connecting electrodes in a ladle furnace according to an embodiment of the present invention;

[0022] Figures 2a to 2d A schematic diagram of the working process of a clamping device for connecting electrodes in a ladle furnace according to an embodiment of the present invention;

[0023] Figure 3 The present invention provides a flowchart of a method for connecting electrodes in a ladle furnace according to an embodiment of the present invention.

[0024] The reference numerals indicate:

[0025] 1. Bracket; 2. Clamping assembly; 3. Pressure sensor; 4. Electrode; 5. Clamping button; 6. Release button; 7. Indicator light;

[0026] 11. Trough; 12. Opening; 13. Clamping hole; 14. Handle;

[0027] 21. Support part; 22. Drive motor; 23. Transmission mechanism; 24. Clamping pliers;

[0028] 111. First side wall; 112. Bottom plate; 113. Second side wall;

[0029] 241. Connecting portion; 242. Clamping portion; 243. Angle. DETAILED DESCRIPTION

[0030] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0032] This embodiment provides a clamping device for connecting electrodes of a ladle furnace. Figure 1 This is a schematic structural diagram of a clamping device for connecting electrodes in a ladle furnace provided in this embodiment.

[0033] like Figure 1 As shown, the clamping device for connecting electrodes in a ladle furnace of this embodiment includes: a bracket 1, a pair of clamping assemblies 2 and a pressure sensor 3. The bracket 1 includes a trough body 11. The trough body 11 is used to accommodate the electrode 4. Clamping holes 13 are symmetrically arranged on the trough walls on both sides of the opening 12 of the trough body 11. A pair of clamping assemblies 2 are symmetrically arranged on the bracket 1. Each clamping assembly 2 can extend into the trough body 11 through a clamping hole 13 to fix the electrode 4. At least one pressure sensor 3 is provided on each clamping assembly 2. The pressure sensor 3 is used to monitor the clamping force of the clamping assembly 2 on the electrode 4.

[0034] See Figure 1 The bracket 1 of this embodiment is made of aluminum alloy, which has the characteristics of light weight and high strength, and is corrosion-resistant, non-magnetic, easy to form, and has good performance and processing performance.

[0035] See Figure 1 The tank body 11 of this embodiment adopts an integrated molding process, has high structural strength, and is not prone to deformation.

[0036] See Figure 1 The pressure sensor 3 of this embodiment adopts a strain gauge (resistance strain type) pressure sensor. The strain gauge (resistance strain type) pressure sensor has good temperature stability and anti-interference ability, and has a compact structure and high detection accuracy.

[0037] When in use, the clamping device for connecting electrodes in a ladle furnace provided in this embodiment can utilize the opening 12 of the trough body 11 to fit the trough body 11 onto the outer diameter of the electrode 4, and drive a pair of clamping components 2 to extend into the trough body 11 through the clamping through-hole 13 to clamp the electrode 4. It is easy to use and does not require manual tightening, which reduces labor intensity and improves work efficiency. A pressure sensor 3 is provided on the clamping component 2 to monitor the clamping pressure to ensure balanced pressure and avoid the situation where the electrode 4 is damaged by being too loose or too tight. When the clamping device of this embodiment is used to dock electrodes, the electrode 4 can be driven to rotate by rotating the bracket 1 to achieve docking between the new electrode 4 and the old electrode. The operation is convenient and saves time and effort.

[0038] Among them, such as Figure 1As shown, the clamping assembly 2 includes a support portion 21, a drive motor 22, a transmission mechanism 23, and a clamping clamp 24. The support portion 21 is disposed on opposite sides of the tank body 11. The drive motor 22 is mounted on the support portion 21. The input end of the transmission mechanism 23 is connected to the output end of the drive motor 22. The clamping clamp 24 is mounted on the output end of the transmission mechanism 23. The transmission mechanism 23 drives the clamping clamp 24 through the clamping hole 13 and into the tank body 11 to clamp the electrode 4.

[0039] like Figure 1 As shown, the drive motor 22 of this embodiment adopts a hybrid stepper motor with a rated voltage of 24V and a torque of 120mN·m. The drive motor 22 of this embodiment is flexible, efficient, low in power consumption, compact in structure, and can achieve precise control.

[0040] This embodiment utilizes the cooperation of the driving motor 22 and the transmission mechanism 23 to drive the clamping clamp 24 to move on the support part 21, so as to extend into the slot body 11 through the clamping through hole 13 to clamp the electrode 4, or withdraw from the slot body 11 to release the electrode 4, thereby realizing automatic clamping and loosening of the electrode 4. There is no need to manually turn the bolts to tighten, and the clamping action can be highly consistent, thereby improving operating efficiency and clamping stability.

[0041] Among them, such as Figure 1 As shown, the transmission mechanism 23 includes a lead screw and a sleeve. The lead screw is connected to the output end of the drive motor 22. The sleeve is slidably mounted on the support portion 21. The inner wall of the sleeve is provided with an internal thread. The sleeve is mounted on the lead screw and is threadedly engaged with the lead screw. The clamp 24 is connected to the sleeve. The drive motor 22 is capable of driving the lead screw to rotate back and forth, thereby driving the sleeve to move along the lead screw on the support portion 21, thereby driving the clamp 24 to extend into or out of the trough body 11.

[0042] See Figure 1 The lead screw of this embodiment is rotatably arranged on the support portion 21, and the lead screw is connected to the drive motor 22 through a coupling. In addition, the lead screw of this embodiment is a ball screw.

[0043] The transmission mechanism 23 of this embodiment includes a lead screw and a sliding sleeve. The drive motor 22 rotates the lead screw through a coupling, which in turn drives the sliding sleeve to move linearly, thereby driving the clamping tongs 24 to extend into or out of the tank 11, thereby clamping and releasing the electrode 4. This embodiment uses a lead screw and sliding sleeve as the transmission mechanism 23, which enables both precise control and a self-locking function.

[0044] Among them, such as Figure 1 As shown, the clamping pliers 24 include a connecting portion 241 and a clamping portion 242. The connecting portion 241 is mounted on the sleeve. The clamping portion 242 is connected to the connecting portion 241. A side of the clamping portion 242 away from the connecting portion 241 is provided with an angle 243. The clamping portion 242 is clamped to the side wall of the electrode 4 by the angle 243.

[0045] like Figure 1 As shown, the connecting portion 241 and the clamping portion 242 of this embodiment are an integrally formed structure, which is beneficial to improving the structural strength and structural stability of the clamp 24.

[0046] In this embodiment, an angle 243 is provided on the side of the clamping portion 242 away from the connecting portion 241. Through the angle 243, a clamping clamp 24 can be clamped on the outer wall of the electrode 4 in two directions. Then, the two clamping clamps 24 can realize the clamping positioning of the four directions of the outer side of the electrode 4, which can simplify the clamping structure while ensuring the clamping stability.

[0047] Among them, such as Figure 1 As shown, the pressure sensor 3 is disposed on a side of the clamping portion 242 away from the connecting portion 241 .

[0048] The pressure sensor 3 of this embodiment is a strain gauge pressure sensor, which is arranged on the side of the clamping portion 242 away from the connecting portion 241 and can contact the side wall of the electrode 4 to obtain the pressure of the clamping portion 242 on the electrode 4 in real time.

[0049] Among them, such as Figure 1 As shown, the bracket 1 further includes a handle 14 . The handle 14 is arranged on the outside of the slot body 11 .

[0050] In this embodiment, a handle 14 is provided on the outside of the tank body 11 to facilitate the rotation of the tank body 11 and further the rotation of the electrode 4 to achieve docking without the need for an additional wrench.

[0051] Among them, such as Figure 1 As shown, the trough body 11 is U-shaped and includes a first side wall 111, a bottom plate 112, and a second side wall 113 connected in sequence. The handle 14 is located on the side of the first side wall 111 away from the bottom plate 112, the connection between the first side wall 111 and the bottom plate 112, the connection between the bottom plate 112 and the second side wall 113, and the side of the second side wall 113 away from the bottom plate 112.

[0052] In this embodiment, there are multiple handles 14 distributed around the tank body 11, which facilitates multiple people to rotate the electrode 4 at multiple positions at the same time to achieve rapid and stable docking of the electrode 4.

[0053] Among them, see Figure 1 The clamping device for connecting electrodes in a ladle furnace further comprises a control unit. The control unit is disposed on the bracket 1. The control unit is located outside the tank body 11. The control unit is connected to the pressure sensor 3 and the pair of clamping assemblies 2.

[0054] The control unit of this embodiment is connected to the pressure sensor 3 and the pair of clamping assemblies 2. The control unit can drive the pair of clamping assemblies 2 to synchronously clamp the electrode 4. After the pressure sensor 3 senses the pressure, it feeds the pressure signal back to the control unit. When the pressure reaches a preset value, the control unit can control the clamping assemblies 2 to stop operation, preventing excessive clamping force and damage to the electrode.

[0055] Among them, such as Figure 1 As shown, the control unit includes a clamping button 5, a releasing button 6 and an indicator light 7. The clamping button 5 and the releasing button 6 are connected to a pair of clamping components 2. The indicator light 7 is connected to the pressure sensor 3.

[0056] The control unit of this embodiment includes a clamping button 4, a release button 5, and an indicator light 6. When in use, the clamping button 4 is pressed to synchronously start the rotation of the drive motors 22 of the two clamping assemblies 2, so that the drive motors 22 on both sides of the trough body 11 respectively push the clamping pliers 24 into the trough body 11 through the transmission mechanism 23 to clamp the electrode 4; a pressure sensor 3 is provided on the clamping portion 242 of the clamping pliers 24, which feeds back the pressure signal to the control unit. When the pressure reaches a preset value, the control unit controls the drive motor 22 to stop rotating, at which point the indicator light 7 turns green, indicating that the electrode 4 has been clamped. After the electrode 4 is installed, the release button 6 is pressed to synchronously start the reverse rotation of the drive motors 22 of the two clamping assemblies 2, so that the drive motors 22 on both sides of the trough body 11 respectively pull the clamping pliers 24 out of the trough body 11 through the transmission mechanism 23 to release the electrode 4, and the indicator light 7 turns yellow.

[0057] The above is a detailed introduction to the structure of the clamping device for connecting electrodes of the ladle furnace. Figures 2a to 2d Introduce the working process of the clamping device:

[0058] First, if Figure 2a As shown, the driving motor 22 is started to drive the clamping pliers 24 to withdraw from the tank body 11, and then the opening 1 of the tank body 11 is directed toward the electrode 4 and moved toward the electrode 4;

[0059] Until the electrode 4 is embedded in the tank 11, Figure 2b As shown;

[0060] Afterwards, if Figure 2c As shown, the drive motor 22 is started to rotate in the reverse direction, and the clamping pliers 24 are pushed into the tank body 11 to clamp the electrode 4 until the pressure of the clamping portion 242 on the electrode 4 reaches a preset value, the drive motor 22 is controlled to stop, and the indicator light turns green; then the electrode 4 can be rotated by the handle 14 to complete the threaded connection between the electrode 4 and the old electrode;

[0061] Finally, if Figure 2dAs shown, the driving motor 22 is started to drive the clamping pliers 24 to withdraw from the tank body 11, and then the tank body 11 is removed from the electrode 4, thus completing the connection of the electrode.

[0062] This embodiment also provides a method for connecting electrodes in a ladle furnace, which utilizes the clamping device for connecting electrodes in the ladle furnace described in the above embodiment. Figure 3 This is a flow chart of a method for connecting electrodes in a ladle furnace provided in this embodiment.

[0063] like Figure 3 As shown, the method for connecting electrodes to a ladle furnace in this embodiment includes the following steps:

[0064] S1. Drive a pair of clamping components 2 to exit the tank 11;

[0065] Specifically, the control unit is used to start the drive motor 22, which drives the lead screw to rotate through the coupling, thereby driving the sleeve to move linearly, so that the clamp 24 is withdrawn from the slot body. Figure 2a shown.

[0066] S2. The tank body 11 is set on the outside of the electrode 4 through the opening 12 of the tank body 11;

[0067] Specifically, such as Figure 2b As shown, the electrode 4 is embedded in the groove body 11 .

[0068] S3 drives a pair of clamping components 2 into the tank 11 and clamps the electrode 4;

[0069] Specifically, the control unit starts the drive motor 11, which drives the lead screw to rotate in the opposite direction through the coupling, and then drives the sleeve to move linearly in the opposite direction, pushing the clamp 24 into the tank 11 to clamp the electrode 4. The clamping portion 242 of the clamp 24 is provided with a pressure sensor 3, which feeds back the pressure signal to the control unit. When the pressure reaches a preset value, the control unit controls the drive motor 11 to stop running. At this time, the indicator light 7 turns green, indicating that the electrode 4 has been clamped. Figure 2c shown.

[0070] S4. Rotate the bracket 1 to drive the electrode 4 to rotate, so that the electrode 4 is connected to the connected electrode by threaded connection;

[0071] Specifically, the operator pushes the handle 14 to rotate the electrode 4 so that the bottom of the electrode 4 and the top of the old electrode are connected through threaded engagement.

[0072] S5. Drive the pair of clamping assemblies 2 out of the tank body 11 to release the electrode 4 and remove the clamping device.

[0073] Specifically, the control unit is used to start the drive motor 22, which drives the lead screw to rotate through the coupling, thereby driving the sleeve to move linearly, pulling the clamp 24 out of the tank body 11 to release the electrode 4, and the indicator light 7 turns yellow.

[0074] It is understandable that before step S1, the process also includes: using a lifting device (such as a hoist or a crane) to lift the new electrode 4 to the electrode to be connected, and aligning the new electrode 4 with the connected electrode, and then operating the lifting device to slowly lower the new electrode 4 until it is confirmed that the new electrode 4 is firmly placed on the connected electrode.

[0075] Before step S5, the process also includes: opening the electrode cross arm clamp, operating the hoisting equipment to slowly lower the connected motor, and when the connected electrode is lowered to a suitable position, closing the electrode cross arm clamp to clamp the electrode, and then continuing the smelting operation.

[0076] The method for connecting electrodes in a ladle furnace of this embodiment uses the clamping device for connecting electrodes in a ladle furnace of the above embodiment, and thus has all the above beneficial effects, which will not be described in detail here.

[0077] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0078] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A clamping device for connecting electrodes in a ladle furnace, characterized in that: include: a bracket, a pair of clamping assemblies, and a pressure sensor; The bracket includes a slot body; the slot body is used to accommodate the electrode; Clamping holes are symmetrically arranged on the groove walls on both sides of the opening of the groove body; A pair of the clamping assemblies are symmetrically arranged on the bracket; each of the clamping assemblies can extend into the slot through one of the clamping through holes to fix the electrode; Each of the clamping components is provided with at least one pressure sensor; the pressure sensor is used to monitor the clamping force of the clamping component on the electrode.

2. The clamping device for connecting electrodes of a ladle furnace according to claim 1, characterized in that: The clamping assembly includes: a support part, a drive motor, a transmission mechanism and a clamping clamp; The support portions are arranged on opposite sides of the trough body; The driving motor is arranged on the supporting portion; The input end of the transmission mechanism is connected to the output end of the drive motor; The clamping pliers are arranged on the output end of the transmission mechanism; The transmission mechanism can drive the clamping pliers to extend into the slot through the clamping through hole to clamp the electrode.

3. The clamping device for connecting electrodes of a ladle furnace according to claim 2, characterized in that: The transmission mechanism includes a lead screw and a sliding sleeve; The lead screw is connected to the output end of the drive motor; The sliding sleeve is slidably arranged on the supporting portion; an internal thread is provided on the inner wall of the sliding sleeve; the sliding sleeve is sleeved on the lead screw and is coupled with the lead screw through threaded transmission; The clamping pliers are connected to the sliding sleeve; The driving motor can drive the lead screw to rotate back and forth, thereby driving the sliding sleeve to move along the lead screw on the support portion, so as to drive the clamping pliers to extend into or withdraw from the slot body.

4. The clamping device for connecting electrodes of a ladle furnace according to claim 3, characterized in that: The clamping pliers include a connecting portion and a clamping portion; The connecting portion is mounted on the sliding sleeve; The clamping portion is connected to the connecting portion; an angle is provided on a side of the clamping portion away from the connecting portion; and the clamping portion is clamped on the side wall of the electrode through the angle.

5. The clamping device for ladle furnace continuous electrode according to claim 4, characterized in that: The pressure sensor is arranged on a side of the clamping portion away from the connecting portion.

6. The clamping device for connecting electrodes of a ladle furnace according to claim 1, characterized in that: The bracket also includes a handle; The handle is arranged on the outer side of the trough body.

7. The clamping device for connecting electrodes of a ladle furnace according to claim 6, characterized in that: The trough body is U-shaped and includes a first side wall, a bottom plate and a second side wall connected in sequence; the handle is located on the side of the first side wall away from the bottom plate, the connection between the first side wall and the bottom plate, the connection between the bottom plate and the second side wall, and the side of the second side wall away from the bottom plate.

8. The clamping device for connecting electrodes of a ladle furnace according to claim 1, characterized in that: Also includes: control unit; The control unit is arranged on the bracket; the control unit is located outside the tank; The control unit is connected to the pressure sensor and the pair of clamping assemblies.

9. The clamping device for connecting electrodes of a ladle furnace according to claim 8, characterized in that: The control unit includes a clamping button, a releasing button and an indicator light; the clamping button and the releasing button are connected to a pair of the clamping components; and the indicator light is connected to the pressure sensor.

10. A method for connecting electrodes in a ladle furnace, using the clamping device for connecting electrodes in a ladle furnace according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1. Drive a pair of the clamping components to exit the tank body; S2. The tank is set on the outside of the electrode through the opening of the tank; S3. Drive a pair of the clamping components into the tank and clamp the electrode; S4. Rotate the bracket to drive the electrode to rotate, so that the electrode and the connected electrode are connected by threaded connection; S5. Drive the pair of clamping assemblies to withdraw from the tank body to release the electrode, and remove the clamping device.

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