Bendable coupling tool for graphite electrodes

Abstract

This utility model discloses a bendable connection tool for graphite electrodes, including a semi-circular open-end clamp. One end of the open-end clamp has a movable anti-slip plate, and the other end has a fixed anti-slip plate. One end of the fixed anti-slip plate has a connecting rod, which is movably connected to the open-end clamp via a triangular connecting plate. The connecting rod has a bending mechanism inside, comprising an upper block, a spring, a lower block, a steel ball, and a pin. The upper block is located on one side of the fixed anti-slip plate, and the spring connects the upper and lower blocks. A steel ball is installed at the end of the lower block. A handle is inserted into the connecting rod and movably connected to it via a pin. This utility model has a simple structure and is easy to use. It enables rapid connection of graphite electrodes when they are offline, while ensuring that the tightness of the connected graphite electrode is appropriate, preventing serious accidents such as graphite electrode detachment or breakage during use, and ensuring safe and stable production.

Description

Technical Field

[0001] This utility model relates to the field of graphite electrode connection technology in LF refining furnace, specifically a bendable connection tool for graphite electrodes. Background Technology

[0002] The LF refining furnace is currently a relatively advanced ladle refining method for molten steel, and one of its most important functions is temperature control of the molten steel. The temperature control process involves using high-voltage electricity to generate an electric arc between a graphite electrode and the molten steel surface, thereby raising the temperature of the molten steel. However, this heating process causes the graphite electrode to wear down. When the wear reaches a certain level—that is, when the distance between the graphite electrode and the molten steel surface exceeds the length of the electric arc generated during heating—it becomes impossible to raise the temperature of the molten steel. At this point, it is necessary to connect an extended graphite electrode to meet the requirements of the temperature control operation. Currently used graphite electrodes are multiple assembled connectors, secured by a connecting tool with a semi-circular front end and a rigid rear end, such as the electrode wrench disclosed in patent number CN 210633560 U. The drawback of the original connecting tool is that it is a rigid connection that relies entirely on manual tightening. This can lead to excessive or insufficient force applied during manual tightening, causing damage to the threads of the graphite electrode connector or making it too loose. As a result, during the heating process, the graphite electrode connector threads may break or loosen due to vibration. The broken graphite electrode may fall into the ladle, causing production interruptions, excessive C content in the molten steel, and the production or safety accidents such as scrap. Utility Model Content

[0003] The purpose of this utility model is to provide a bendable connection tool for graphite electrodes, which has a simple structure and is easy to use. It can realize the rapid connection of graphite electrodes when they are offline, while ensuring that the tightness of the connected graphite electrodes is moderate, avoiding serious accidents such as graphite electrodes falling off or breaking during use, and ensuring safe and stable production, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a graphite electrode bendable connection tool, comprising a semi-circular open-end caliper, one end of which is provided with a movable anti-slip plate and the other end with a fixed anti-slip plate. A connecting rod is provided at the end of the open-end caliper near the fixed anti-slip plate, and the connecting rod is movably connected to the open-end caliper via a triangular connecting plate. A bending mechanism is provided inside the connecting rod and is connected to a handle via the bending mechanism. The bending mechanism includes an upper top block, a spring, a lower top block, a steel ball, and a pin. The upper top block is located on one side of the fixed anti-slip plate, the spring connects the upper and lower top blocks, and a steel ball is installed at the end of the lower top block. The handle is inserted into the connecting rod and is movably connected to the connecting rod via a pin.

[0005] Preferably, both the movable and fixed anti-slip plates have toothed anti-slip structures on their end faces.

[0006] Preferably, the handle and the bending mechanism are connected by a concave-convex pin structure.

[0007] Preferably, the end of the handle is provided with a groove adapted to the steel ball.

[0008] Preferably, the rear end of the handle is equipped with a non-slip grip.

[0009] Preferably, when the pushing force of the handle when it rotates clockwise is greater than the pushing force of the spring, the handle bends around the pin.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] This graphite electrode bending connection tool has a simple structure and is easy to use. It can quickly connect graphite electrodes when they are offline, while ensuring that the tightness of the connected graphite electrodes is moderate, avoiding serious accidents such as graphite electrodes falling off or breaking during use, and ensuring safe and stable production. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is the front view of this utility model;

[0014] Figure 3 This is a schematic diagram of the bending state of this utility model.

[0015] In the diagram: 1. Opening caliper; 2. Movable anti-slip plate; 3. Fixed anti-slip plate; 10. Connecting plate; 9. Handle; 4. Upper top block; 5. Spring; 6. Lower top block; 7. Steel ball; 8. Pin; 9. Handle; 11. Connecting rod; 12. Groove. Detailed Implementation

[0016] 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 protection scope of the present utility model.

[0017] Please see Figure 1-3This embodiment provides a graphite electrode bendable connection tool, which is made of chrome vanadium steel and high-strength steel, and has a certain strength. It includes a semi-circular open-end clamp 1, with a movable anti-slip plate 2 at one end and a fixed anti-slip plate 3 at the other end. Both the movable and fixed anti-slip plates have toothed anti-slip structures on their end faces. A connecting rod 11 is located near the fixed anti-slip plate 3 at one end of the open-end clamp 1. The connecting rod 11 is movably connected to the open-end clamp 1 via a triangular connecting plate 10. A bending mechanism is located inside the connecting rod 11 and is connected to a handle 9 via the bending mechanism. The bending mechanism includes an upper top block 4, a spring 5, a lower top block 6, a steel ball 7, and a pin 8. The upper top block 4 is located on one side of the fixed anti-slip plate 3, the spring 5 connects the upper top block 4 and the lower top block 6, and the steel ball 7 is installed at the end of the lower top block 6. The handle... Handle 9 is inserted into connecting rod 11 and is movably connected to connecting rod 11 via pin 8. Specifically, the connection between handle 9 and bending mechanism is a concave-convex pin connection structure. The end of handle 9 is provided with a groove 12 that matches steel ball 7. The rear end of handle 9 is equipped with an anti-slip handle. When the pushing force of handle 9 when it rotates clockwise is greater than the top force of spring 5, handle 9 bends around pin 8. In use, use open caliper 1 to put on the electrode to be connected, then put the movable anti-slip plate 2 on the surface of the electrode and then use the fixed anti-slip plate 3 to lock the electrode to be connected. Then push handle 9 clockwise to drive the electrode to rotate. Repeat this until the electrode is tightened. After tightening, 2-3 people push handle 9 at the same time. The bending of handle 9 indicates that it is tightened in place, so that the connection of graphite electrode obtains the best connection state, ensuring that the connection of the extension part is more firm and ensuring the quality of the graphite electrode after extension.

[0018] Specifically, graphite electrodes are one of the components of the LF furnace refining unit and a key piece of equipment for steel refining. Steel temperature control is a crucial function of the LF furnace and a primary measure to improve the castability of molten steel. The single graphite electrode used in the LF refining furnace is a cylinder with a diameter of φ450mm and a length of 1800mm. The upper part is a concave frustum with internal threads, and the lower part is a convex shape with external threads. During connection, the graphite electrode to be connected is placed on a special extension device, and a crane is used to lift the electrode to be connected above it. Compressed air is used to clean the connecting surfaces and threads of both graphite electrodes. The upper and lower connecting threads are aligned, and the connection is then directed. The machine slowly lowers the graphite electrode to be connected while rotating it until the two electrode threads contact. Then, the open caliper 1 at the front end of the bendable connecting tool of this invention clamps the graphite electrode and pushes the handle 9 clockwise to rotate the electrode. This process is repeated until the graphite electrode is tightened. When tightening, 2-3 people apply force simultaneously. When the pushing force of the handle 9 is greater than the pushing force of the spring 5, a bend will occur, which the operator can clearly feel by hand and clearly observe visually. At this point, it indicates that the graphite electrode has been properly connected with appropriate tightness, thus avoiding damage to the threads caused by inadequate tightening or excessive operation.

[0019] In summary, the graphite electrode bending connection tool provided by this utility model is most significant for use in metallurgical enterprises operating LF furnaces, especially for offline graphite electrode extension. It ensures optimal connection at the electrode joint, preventing electrode breakage or cracking, and avoiding poor contact and arcing due to loose tightening. It guarantees the quality of the extended electrode, effectively preventing loosening and ensuring a more secure connection. It meets the practical needs of on-site production, is simple to process, low in cost, easy to operate, and increases safety, making it worthy of widespread application.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bendable connection tool for graphite electrodes, comprising a semi-circular open-end clamp (1), one end of which is provided with a movable anti-slip plate (2) and the other end with a fixed anti-slip plate (3), wherein the end of the open-end clamp (1) near the fixed anti-slip plate (3) is provided with a connecting rod (11), the connecting rod (11) being movably connected to the open-end clamp (1) via a triangular connecting plate (10), characterized in that: The connecting rod (11) is provided with a bending mechanism inside and is connected to the handle (9) through the bending mechanism; the bending mechanism includes an upper top block (4), a spring (5), a lower top block (6), a steel ball (7) and a pin (8); the upper top block (4) is located on one side of the fixed anti-slip plate (3), the spring (5) is connected between the upper top block (4) and the lower top block (6), and the steel ball (7) is installed at the end of the lower top block (6); the handle (9) is inserted into the connecting rod (11) and is movably connected to the connecting rod (11) through the pin (8).

2. The graphite electrode bendable connection tool according to claim 1, characterized in that: Both the movable anti-slip plate (2) and the fixed anti-slip plate (3) have toothed anti-slip structures on their end faces.

3. The graphite electrode bendable connection tool according to claim 1, characterized in that: The handle (9) and the bending mechanism are connected by a concave-convex pin structure.

4. The graphite electrode bendable connection tool according to claim 1, characterized in that: The end of the handle (9) is provided with a groove (12) that is adapted to the steel ball (7).

5. The graphite electrode bendable connection tool according to claim 1, characterized in that: The rear end of the handle (9) is equipped with a non-slip grip.

6. The graphite electrode bendable connection tool according to claim 1, characterized in that: When the pushing force of the handle (9) when it rotates clockwise is greater than the pushing force of the spring (5), the handle (9) bends around the pin (8).

Images