An arc initiator for rare earth electrolysis

Abstract

This application provides an arc initiation machine for rare earth electrolysis, relating to the field of arc initiation machines. The arc initiation machine includes an arc initiation machine with a receiving groove on its upper surface. An arc initiation rod is disposed inside the receiving groove. A fixing ring is fixedly connected to the upper surface of the arc initiation machine. The fixing ring has an L-shaped cross-section, and a rotating ring is rotatably connected to the top wall of the fixing ring. Through the cooperation of structures such as the fixing ring, rotating ring, connecting rod, mounting base, arc plate, scraper, sliding rod, limiting plate, spring, and corrugated protective tube, when the arc initiation rod is raised or lowered, the scraper, aided by the elastic force applied by the spring, always remains in close contact with the outer surface of the arc initiation rod. Utilizing the vertical motion difference, it automatically scrapes away hard adhering substances such as fluoride electrolyte shells and rare earth metal condensates from the surface. This eliminates the need for manual operation of the scraper in high-temperature environments, completely eliminating the safety hazards of high-temperature burns and ultraviolet radiation, and achieving a safe, efficient, and stable automatic cleaning function.

Description

Technical Field

[0001] This utility model relates to the field of arc initiation machines, and more specifically, to an arc initiation machine for rare earth electrolysis. Background Technology

[0002] In the molten salt electrolysis production of rare earth metals and alloys, the rare earth electrolysis arc initiator is a core specialized piece of equipment in the start-up phase of the electrolytic cell. Its core component, the arc initiator rod, is directly inserted into the electrolytic cell. Through arc discharge, it rapidly melts the solid fluoride electrolyte system and heats it to 900–1000℃, providing a stable liquid electrolyte environment and high-temperature conditions for subsequent DC electrolysis operations. Currently, in industrial applications, arc initiators are mostly made of high-temperature resistant and highly conductive materials such as graphite, tungsten, or molybdenum. Moreover, the arc initiators used with the same arc initiator are all standard equal-diameter cylindrical structures with uniform outer diameters, ensuring the conductivity stability and operational adaptability during the arc initiation process.

[0003] However, after the arc-starting rod completes the arc-starting operation, a layer of mixed deposits inevitably adheres to its surface. These deposits mainly consist of solidified fluoride electrolyte shells, rare earth metal or alloy layers, and small amounts of carbide and fluoride slag. These deposits are soft and sticky at high temperatures, but become hard, brittle, and extremely adhesive after cooling. If not cleaned in time, they will cause abnormal outer diameter and increased surface roughness of the arc-starting rod. This will not only affect the arc stability during the next arc-starting operation, leading to decreased arc-starting efficiency and increased energy consumption, but also accelerate the wear of the arc-starting rod, shorten its service life, and increase the cost of production consumables. In the existing technology, the cleaning of the deposits on the surface of the arc-starting rod is mostly done manually by hand with a high-temperature resistant scraper. Operators need to operate in the high-temperature environment of the open electrolytic cell, which poses safety hazards such as high-temperature burns and ultraviolet radiation. In view of this, we propose an arc-starting machine for rare earth electrolysis. Utility Model Content

[0004] The purpose of this invention is to solve the safety hazards of high-temperature burns and ultraviolet radiation that exist in current manual cleaning methods.

[0005] To achieve the above-mentioned objectives and improve the aforementioned problems, this utility model provides an arc-starting machine for rare earth electrolysis, comprising an arc-starting machine, an accommodating groove formed on the upper surface of the arc-starting machine, an arc-starting rod disposed inside the accommodating groove, a fixing ring fixedly connected to the upper surface of the arc-starting machine, the fixing ring having an L-shaped cross-section, a rotating ring rotatably connected to the top wall of the fixing ring, a connecting rod fixedly connected to the lower surface of the rotating ring, a mounting base fixedly connected to the end of the connecting rod, a gap existing between the inner wall of the mounting base and the arc-starting rod, an arc-shaped plate fixedly connected to the lower surface of the mounting base, a scraper disposed on the inner side of the arc-shaped plate, a sliding rod fixedly connected to the outer side of the scraper, the end of the sliding rod slidingly penetrating to the outer surface of the arc-shaped plate, and a spring-loaded fine-tuning component disposed on the sliding rod.

[0006] As a preferred technical solution of this application, the elastic fine-tuning component includes a limiting plate, the limiting plate is fixedly connected to the end of the sliding rod, a spring is fixedly connected to the inner side of the limiting plate, the end of the spring is fixedly connected to the outer side of the arc plate, a corrugated protective tube is fixedly connected between the limiting plate and the arc plate, and a fixing plate is fixedly connected to the left side surface of the arc starting machine.

[0007] As a preferred technical solution of this application, two guide rods are fixedly connected to the upper surface of the fixing plate, a top plate is fixedly connected to the upper end of the two guide rods, and a threaded rod is rotatably connected to the lower surface of the top plate.

[0008] As a preferred technical solution of this application, a motor is fixedly connected to the upper surface of the fixing plate, the output end of the motor is fixedly connected to the threaded rod, and a displacement plate is slidably sleeved on the outer surface of the two guide rods.

[0009] As a preferred technical solution of this application, the displacement plate is threadedly connected to the threaded rod, the upper end of the arc-starting rod slides through to the upper surface of the displacement plate, and a connecting sleeve is slidably sleeved on the outer surface of the upper side of the displacement plate of the arc-starting rod.

[0010] As a preferred technical solution of this application, the connecting sleeve is provided with a fixing bolt, and the connecting sleeve is fixedly connected to the arc-starting rod by the fixing bolt.

[0011] As a preferred technical solution of this application, the connecting sleeve is fixedly connected to the displacement plate, a fixing rod is fixedly connected to the inner wall of the fixing ring, a sealing ring is fixedly connected to the end of the fixing rod, an annular groove communicating with the interior of the sealing ring is opened on the lower surface of the sealing ring, the upper surface of the mounting base extends into the interior of the sealing ring through the annular groove, a winding wheel is rotatably connected to the interior of the sealing ring, the upper surface of the mounting base is fixedly connected to the lower surface of the winding wheel, and a spring is fixedly connected between the upper surface of the winding wheel and the top wall of the sealing ring.

[0012] As a preferred technical solution of this application, a steel cable is fixedly connected to the winding reel, the end of the steel cable slides through to the outside of the sealed ring, a fixed pulley is rotatably connected to the outer surface of the sealed ring, and the end of the steel cable is fixedly connected to the displacement plate after passing through the fixed pulley.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: In the scheme of this application: 1. Through the cooperation of structures such as fixed ring, rotating ring, connecting rod, mounting base, arc plate, scraper, sliding rod, limiting plate, spring, and corrugated protective tube, when the arc-starting rod is raised or lowered, the scraper always keeps in close contact with the outer surface of the arc-starting rod by means of the elastic force applied by the spring. It automatically scrapes off hard deposits such as fluoride electrolyte shell and rare earth metal condensation layer on the surface by utilizing the vertical motion difference. There is no need for manual operation of the scraper in high-temperature environment, which completely eliminates the safety hazards of high temperature burns and ultraviolet radiation, and realizes a safe, efficient and stable automatic cleaning function.

[0014] 2. Through the cooperation of structures such as motor, threaded rod, displacement plate, connecting sleeve, fixing bolt, sealing ring, winding wheel, spring, steel cable, and fixed pulley, the motor drives the threaded rod to vertically raise and lower the displacement plate and the arc-starting rod. At the same time, the steel cable pulls the winding wheel to compress the spring and drive the mounting base to rotate as a whole. This causes the scraper to rotate circumferentially synchronously during the raising and lowering process, performing all-round cleaning of the arc-starting rod surface without dead angles. This not only improves the uniformity and thoroughness of cleaning, but also avoids the problem of the scraper being unable to contact the arc-starting rod after the outer diameter shrinks due to long-term high-temperature erosion, thus extending the service life of the arc-starting rod. Attached Figure Description

[0015] Figure 1 The schematic diagram of the arc initiator for rare earth electrolysis provided in this application Figure 2 A schematic diagram of the scraper in the arc initiation machine for rare earth electrolysis provided in this application; Figure 3 A schematic diagram of the internal structure of the corrugated protective pipe in the arc initiator for rare earth electrolysis provided in this application; Figure 4 A schematic diagram of the internal structure of the closed ring in the arc initiator for rare earth electrolysis provided in this application; Figure 5 A schematic diagram of the rotating ring in the arc initiator for rare earth electrolysis provided in this application; Figure 6 The rare earth electrolysis arc initiator provided in this application Figure 1 Enlarged view of point A in the middle.

[0016] The image shows: 1. Arc initiation machine; 2. Receiving groove; 3. Arc initiation rod; 4. Fixing ring; 5. Rotating ring; 6. Connecting rod; 7. Mounting base; 8. Arc plate; 9. Scraper; 10. Sliding rod; 11. Limiting plate; 12. Spring; 13. Corrugated protective pipe; 14. Fixing plate; 15. Guide rod; 16. Top plate; 17. Threaded rod; 18. Motor; 19. Displacement plate; 20. Connecting sleeve; 21. Fixing bolt; 22. Sealing ring; 23. Winding wheel; 24. Clock spring; 25. Steel cable; 26. Fixed pulley; 27. Fixing rod; 28. Annular groove. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0019] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] Example 1 Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6An arc-starting machine for rare earth electrolysis includes an arc-starting machine 1. The upper surface of the arc-starting machine 1 has a receiving tank 2 for storing materials. An arc-starting rod 3 is disposed inside the receiving tank 2. A fixing ring 4 is fixedly connected to the upper surface of the arc-starting machine 1. The fixing ring 4 has an L-shaped cross-section. A rotating ring 5 is rotatably connected to the top wall of the fixing ring 4, providing a rotation function. A connecting rod 6 is fixedly connected to the lower surface of the rotating ring 5, serving a connecting function. A mounting base 7 is fixedly connected to the end of the connecting rod 6. There is a gap between the inner wall of the mounting base 7 and the arc-starting rod 3. An arc-shaped plate 8 for component mounting is fixedly connected to the lower surface of the mounting base 7. A scraper 9 for cleaning residue on the arc-starting rod 3 is disposed on the inner side of the arc-shaped plate 8. A sliding rod 10 providing a fine-tuning lateral movement function is fixedly connected to the outer side of the scraper 9. The end of the sliding rod 10 slides through to the outer surface of the arc-shaped plate 8. A spring-loaded fine-tuning component is disposed on the sliding rod 10.

[0022] Through the cooperation of structures such as the fixed ring 4, rotating ring 5, connecting rod 6, mounting base 7, arc plate 8, scraper 9, sliding rod 10, limiting plate 11, spring 12, and corrugated protective tube 13, when the arc-starting rod 3 is raised or lowered, the scraper 9, with the help of the elastic force applied by the spring 12, always keeps close contact with the outer surface of the arc-starting rod 3. It automatically scrapes off hard deposits such as fluoride electrolyte shell and rare earth metal condensation layer attached to the surface by utilizing the vertical motion difference. There is no need for manual operation of the scraper 9 in high-temperature environments, which completely eliminates the safety hazards of high-temperature burns and ultraviolet radiation, and realizes a safe, efficient and stable automatic cleaning function.

[0023] Example 2 The arc initiator for rare earth electrolysis provided in Example 1 has been further optimized, specifically, as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the elastic fine-tuning assembly includes a limiting plate 11, which is fixedly connected to the end of the sliding rod 10. A spring 12 for applying elastic force is fixedly connected to the inner side of the limiting plate 11. The end of the spring 12 is fixedly connected to the outer side of the arc plate 8. A corrugated protective tube 13 to prevent material from contacting the spring 12 is fixedly connected between the limiting plate 11 and the arc plate 8. A fixing plate 14 is fixedly connected to the left side surface of the arc-starting machine 1. Two guide rods 15 are fixedly connected to the upper side surface of the fixing plate 14. A top plate 16 is fixedly connected to the upper end of the two guide rods 15. A threaded rod 17 is rotatably connected to the lower side surface of the top plate 16. A motor 18 as a drive source is fixedly connected to the upper side surface of the fixing plate 14. The output end of the motor 18 is fixedly connected to the threaded rod 17. A displacement plate 19 is slidably sleeved on the outer surface of the two guide rods 15.

[0024] The displacement plate 19 is threadedly connected to the threaded rod 17. The upper end of the arc-starting rod 3 slides through to the upper surface of the displacement plate 19. A connecting sleeve 20 for fixing the arc-starting rod 3 is slidably sleeved on the outer surface of the upper side of the displacement plate 19. A fixing bolt 21 is provided on the connecting sleeve 20. The connecting sleeve 20 is fixedly connected to the arc-starting rod 3 through the fixing bolt 21. The connecting sleeve 20 is fixedly connected to the displacement plate 19. A fixing rod 27 is fixedly connected to the inner wall of the fixing ring 4. A sealing ring 22 is fixedly connected to the end of the fixing rod 27. An annular groove 28 communicating with the interior of the sealing ring 22 is opened on the lower surface of the sealing ring 22. The mounting base 7... The upper surface extends into the interior of the sealing ring 22 through the annular groove 28. A winding wheel 23 is rotatably connected inside the sealing ring 22. The upper surface of the mounting base 7 is fixedly connected to the lower surface of the winding wheel 23. A spring spring 24 for providing motion buffer is fixedly connected between the upper surface of the winding wheel 23 and the top wall of the sealing ring 22. A steel cable 25 is fixedly connected to the winding wheel 23. The end of the steel cable 25 slides through to the outside of the sealing ring 22. A fixed pulley 26 for reducing wear of the steel cable 25 is rotatably connected to the outer surface of the sealing ring 22. The end of the steel cable 25 is fixedly connected to the displacement plate 19 after passing through the fixed pulley 26.

[0025] Through the coordination of structures such as motor 18, threaded rod 17, displacement plate 19, connecting sleeve 20, fixing bolt 21, sealing ring 22, winding wheel 23, spring 24, steel cable 25, and fixed pulley 26, motor 18 drives threaded rod 17 to move displacement plate 19 and arc-starting rod 3 vertically up and down. At the same time, steel cable 25 pulls winding wheel 23 to compress spring 24 and drive mounting base 7 to rotate as a whole, so that scraper 9 rotates synchronously in the circumferential direction during the lifting process, and performs all-round cleaning of the surface of arc-starting rod 3 without dead angles. This not only improves the uniformity and thoroughness of cleaning, but also avoids the problem that scraper 9 cannot contact the arc-starting rod 3 after the outer diameter shrinks due to long-term high-temperature erosion, thus extending the service life of arc-starting rod 3.

[0026] Among them, the corrugated protective pipe 13 is made of metal.

[0027] The usage process of the arc initiation machine for rare earth electrolysis provided by this utility model is as follows: When it is necessary to clean the outer surface of the arc-starting rod 3, the threaded rod 17 can be driven to rotate by starting the motor 18. Since the movement trajectory of the displacement plate 19 is restricted by the guide rod 15, the rotation of the threaded rod 17 can synchronously drive the displacement plate 19 to move vertically. When the displacement plate 19 moves, it will drive the arc-starting rod 3 to move upward. Since the mounting base 7 is fixed in a vertical position, the scraper 9 will form a vertical movement difference with the arc-starting rod 3. The outer surface of the arc-starting rod 3 is cleaned by the movement difference. At the same time, the elastic force applied by the spring 12 keeps the scraper 9 in contact with the arc-starting rod 3, avoiding the shrinkage of the outer diameter of the arc-starting rod 3 due to long-term high-temperature erosion. At the same time, when the displacement plate 19 moves, it will pull the winding wheel 23 to rotate by the steel cable 25. When the winding wheel 23 initially rotates, it will compress the spring spring 24 to provide buffer. After the movement continues, it can drive the mounting base 7 to rotate as a whole, which in turn indirectly drives the scraper 9 to rotate, so as to achieve a comprehensive cleaning of the surface of the arc-starting rod 3.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can be a mechanical connection or an electrical connection; they can be communicative; they can be a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. An arc initiator for rare earth electrolysis, characterized in that, The device includes an arc-starting machine (1), which has a receiving groove (2) on its upper surface. An arc-starting rod (3) is installed inside the receiving groove (2). A fixing ring (4) is fixedly connected to the upper surface of the arc-starting machine (1). The cross-section of the fixing ring (4) is L-shaped. A rotating ring (5) is rotatably connected to the top wall of the fixing ring (4). A connecting rod (6) is fixedly connected to the lower surface of the rotating ring (5). A mounting base (7) is fixedly connected to the end of the connecting rod (6). There is a gap between the inner wall of the mounting base (7) and the arc-starting rod (3). An arc plate (8) is fixedly connected to the lower surface of the mounting base (7). A scraper (9) is installed on the inner side of the arc plate (8). A sliding rod (10) is fixedly connected to the outer side of the scraper (9). The end of the sliding rod (10) slides through to the outer surface of the arc plate (8). An elastic fine-tuning component is installed on the sliding rod (10).

2. The arc initiator for rare earth electrolysis according to claim 1, characterized in that, The elastic fine-tuning component includes a limiting plate (11), which is fixedly connected to the end of the sliding rod (10). A spring (12) is fixedly connected to the inner side of the limiting plate (11), and the end of the spring (12) is fixedly connected to the outer side of the arc plate (8). A corrugated protective tube (13) is fixedly connected between the limiting plate (11) and the arc plate (8). A fixing plate (14) is fixedly connected to the left side surface of the arc-starting machine (1).

3. The arc initiator for rare earth electrolysis according to claim 2, characterized in that, Two guide rods (15) are fixedly connected to the upper surface of the fixed plate (14), and a top plate (16) is fixedly connected to the upper end of the two guide rods (15). A threaded rod (17) is rotatably connected to the lower surface of the top plate (16).

4. The arc initiator for rare earth electrolysis according to claim 3, characterized in that, A motor (18) is fixedly connected to the upper surface of the fixed plate (14), and the output end of the motor (18) is fixedly connected to the threaded rod (17). A displacement plate (19) is slidably sleeved on the outer surface of the two guide rods (15).

5. The arc initiator for rare earth electrolysis according to claim 4, characterized in that, The displacement plate (19) is threadedly connected to the threaded rod (17), and the upper end of the arc-starting rod (3) slides through to the upper surface of the displacement plate (19). The arc-starting rod (3) is slidably fitted with a connecting sleeve (20) on the outer surface of the upper side of the displacement plate (19).

6. The arc initiator for rare earth electrolysis according to claim 5, characterized in that, The connecting sleeve (20) is provided with a fixing bolt (21), and the connecting sleeve (20) is fixedly connected to the arc-starting rod (3) by the fixing bolt (21).

7. The arc initiator for rare earth electrolysis according to claim 6, characterized in that, The connecting sleeve (20) is fixedly connected to the displacement plate (19). A fixing rod (27) is fixedly connected to the inner wall of the fixing ring (4). A sealing ring (22) is fixedly connected to the end of the fixing rod (27). An annular groove (28) communicating with the interior of the sealing ring (22) is opened on the lower surface of the sealing ring (22). The upper surface of the mounting base (7) extends into the interior of the sealing ring (22) through the annular groove (28). A winding wheel (23) is rotatably connected inside the sealing ring (22). The upper surface of the mounting base (7) is fixedly connected to the lower surface of the winding wheel (23). A spring spring (24) is fixedly connected between the upper surface of the winding wheel (23) and the top wall of the sealing ring (22).

8. The arc initiator for rare earth electrolysis according to claim 7, characterized in that, A steel cable (25) is fixedly connected to the winding wheel (23). The end of the steel cable (25) slides through to the outside of the sealing ring (22). A fixed pulley (26) is rotatably connected to the outer surface of the sealing ring (22). The end of the steel cable (25) is fixedly connected to the displacement plate (19) after passing through the fixed pulley (26).

Images