Electrolytic cell cathode steel rod live welding device

Abstract

The application relates to the technical field of welding equipment, and particularly discloses an aluminum electrolysis cell cathode steel rod live welding device, which comprises a rack and a welding assembly arranged on the top of the rack; welding auxiliary assemblies and fixing assemblies connected with the rack are symmetrically arranged below the welding assembly; and a polishing assembly connected with the rack is arranged below the welding auxiliary assembly; the new and old cathode steel rods are butt-jointed and welded through the fixing device and the auxiliary welding device, the welding strength is prevented from being low or the welding position from being deviated, the welding quality and the qualified rate are improved, the welding auxiliary assembly adopts a detachable semicircular arc plate structure, the semicircular arc plate can be moved away through the moving assembly after the welding is completed, so that the welding position is exposed, the subsequent polishing and polishing work is facilitated, the operation convenience is effectively improved, manual intervention is reduced, and the work efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and specifically to a device for live welding of cathode steel bars in aluminum electrolysis cells. Background Technology

[0002] As the core equipment in aluminum electrolysis production, the cathode steel rods of the aluminum electrolysis cell serve the dual functions of conductivity and structural support. During major overhauls of the electrolysis cell, the old steel rods need to be cut and replaced, and the new and old steel rods are connected by welding to maintain the continuity of the current circuit. In traditional processes, steel rod welding must be carried out under power outage conditions, but power outages will cause the aluminum electrolysis cell to stop operating, resulting in economic losses. In addition, using traditional welding methods, the strong magnetic field generated during the operation of the electrolysis cell will cause the weld pool to be unstable, molten iron to splash, and affect the weld quality. When welding manually, welders need to operate in a high magnetic field environment, which poses a risk of electric shock.

[0003] Based on the above, in the prior art, patent CN115283819A discloses an electric welding system for cathode steel bars in an aluminum electrolysis cell. The system includes an electrolysis cell body with multiple old cathode steel bars arranged side-by-side within it. The welding system also includes a docking device to assist in welding new cathode steel bars of equal diameter to the cut end faces of the old cathode steel bars. The docking device includes a sleeve, a blocking mechanism, a first clamp, and a second clamp. A displacement driving device is provided on the electrolysis cell body, connected to the sleeve via a support frame. A clamp driver is provided on the sleeve, and a welding device is provided on the support frame. This invention uses the first and second clamps to position the new and old cathode steel bars, ensuring stability and precise alignment during welding. The blocking mechanism separates the two bars, allowing molten metal to flow in, ensuring precise welding and preventing low welding strength or welding position misalignment, thus improving the pass rate.

[0004] However, although the system can complete the welding of cathode steel bars without interrupting power to the aluminum electrolysis cell, improving production efficiency and ease of operation, there are still some problems that need to be solved. First, the welding system cannot grind the welded parts. Second, the welding of new and old cathode steel bars is carried out in the non-separable sleeve of the docking device. After the welding is completed, it is not easy to remove the cathode steel bars from the sleeve of the docking device. Summary of the Invention

[0005] To address the technical deficiencies in the background art, this invention proposes an electric welding device for cathode steel rods in aluminum electrolysis cells, which solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows:

[0006] An electric welding device for cathode steel rods in an aluminum electrolysis cell includes a frame and a welding assembly mounted on top of the frame. Below the welding assembly, a welding auxiliary assembly and a fixing assembly connected to the frame are symmetrically arranged in sequence. The welding assembly includes a crucible mounted above the frame, with a guide pipe at the bottom of the crucible. Below the welding auxiliary assembly, a grinding assembly connected to the frame is arranged. The welding auxiliary assembly includes a mounting cylinder connected to the frame and a welding cylinder disposed within the mounting cylinder. Each welding cylinder includes two downwardly symmetrically arranged semi-circular arc plates with opposing concave surfaces. Two welding cylinders are coaxially joined laterally, forming a welding cavity inside the joint. The welding cavity communicates with the crucible through the guide pipe. A moving assembly is correspondingly connected to the convex surface of each semi-circular arc plate and is connected to the frame. The fixing assembly includes an outer ring and an arc-shaped fixing plate disposed inside the outer ring and distributed rotationally symmetrically. A fixing electric cylinder connected to the arc-shaped fixing plate passes through the inner part of the outer ring, and the fixing electric cylinder and the arc-shaped fixing plate are arranged in a one-to-one correspondence.

[0007] As a further technical solution of the present invention, the crucible is provided with symmetrical connecting plates on the left and right sides, and the connecting plates are provided with guide rods that can slide freely up and down and are connected to one end of the frame. The guide rods are provided with lifting electric cylinders connected to the lower surface of the connecting plates on the side away from the crucible. The top of the crucible is provided with a lid that is hinged to it, and the side wall of the crucible is provided with ignition holes.

[0008] As a further technical solution of the present invention, a second fastening edge is provided on one side of the semi-circular arc plate near the welding cavity, and a first fastening edge connected to the semi-circular arc plate is provided on both the front and rear sides of the semi-circular arc plate. The two ends of the second fastening edge are respectively connected to the corresponding first fastening edge. The semi-circular arc plate is provided with a plurality of fastening bolts, and adjacent first fastening edges and adjacent second fastening edges are respectively connected by fastening bolts.

[0009] As a further technical solution of the present invention, the moving component includes a first electric cylinder connected to the outer convex surface of the semi-circular arc plate, a first threaded sleeve connected to the first electric cylinder, a first lead screw disposed inside the first threaded sleeve and threadedly connected thereto, a mounting frame symmetrically disposed on the left and right sides of the first lead screw and connected to the frame, a first motor connected to one end of the first lead screw and mounted on the mounting frame, the other end of the first lead screw being rotatably connected to the mounting frame, and a moving through groove longitudinally provided on the outer convex surface of the semi-circular arc plate for the first electric cylinder to move inside it.

[0010] As a further technical solution of the present invention, the left and right sides of the outer ring are symmetrically provided with rotating annular grooves, and L-shaped support columns that can slide inside the rotating annular grooves on the left and right sides of the outer ring are symmetrically provided. One end of the L-shaped support column is placed in the rotating annular groove, and the other end of the L-shaped support column is connected to the frame.

[0011] As a further technical solution of the present invention, the outer surface of the outer ring is provided with driving teeth, and a driving gear that can mesh and rotate with the driving teeth is provided on one side below the outer ring. The driving gear is connected to a first rotating shaft, the first rotating shaft is rotatably connected to an L-shaped support column, a second motor is provided on one side of the L-shaped support column, one end of the first rotating shaft is connected to the power output shaft of the second motor, and the other end of the first rotating shaft is connected to the driving gear.

[0012] As a further technical solution of the present invention, the grinding assembly includes a grinding block, a second rotating shaft connected to the grinding block, a fourth motor connected to the second rotating shaft, an adjusting electric cylinder connected to the fourth motor, a second threaded sleeve connected to the adjusting electric cylinder, a second lead screw disposed inside the second threaded sleeve and threadedly connected, and a third motor connected to one end of the second lead screw. One end of the second rotating shaft is connected to the power output shaft of the fourth motor, and the other end of the second rotating shaft is connected to the grinding block. The grinding block is disposed directly below the welding cavity.

[0013] The beneficial effects of this invention are as follows:

[0014] By combining welding components, welding auxiliary components, and fixing components, efficient welding of cathode steel rods in aluminum electrolysis cells can be achieved. The welding cylinder of the welding auxiliary component allows for easy fixing and coaxial splicing of new and old cathode steel rods to form a welding cavity, ensuring welding accuracy. The moving component allows the semi-circular arc plate to move flexibly, facilitating demolding after welding and exposing the welding position, which is convenient for subsequent grinding and polishing. The grinding component can precisely adjust the position and rotation speed of the grinding block to ensure high-quality grinding and polishing of the weld. The fixing component, through the cooperation of the fixed electric cylinder and the arc-shaped fixing plate, can stably clamp the new and old cathode steel rods, ensuring stability during the welding process. The fixing component, through the cooperation of the outer ring and the drive gear, and the support of the L-shaped support column, allows the outer ring to rotate smoothly, driving the welded cathode steel rod to rotate, further facilitating the grinding block of the grinding component to perform all-round grinding of the weld. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the internal structure of the present invention.

[0016] Figure 2 For along Figure 1 A magnified view of a portion of point AA in the middle.

[0017] Figure 3 This is a three-dimensional structural diagram of the welding auxiliary component of the present invention.

[0018] Figure 4This is a three-dimensional structural diagram of the semi-circular arc plate of the present invention.

[0019] Figure 5 This is a three-dimensional structural diagram of the fixing component of the present invention.

[0020] Figure label:

[0021] 1-Rack;

[0022] 2-Welding assembly; 21-Crucible; 22-Cauldron lid; 23-Guide tube; 24-Connecting plate; 25-Lifting electric cylinder; 26-Guide rod;

[0023] 3-Welding auxiliary components; 31-Mounting cylinder; 311-Moving through groove; 32-Semi-circular arc plate; 321-First fastening edge; 322-Second fastening edge; 323-Fastening bolt; 33-Ventilation hole; 34-Injection channel; 35-Welding cavity; 36-Welding cylinder;

[0024] 4-Moving component; 41-Mounting bracket; 42-First motor; 43-First lead screw; 44-First threaded sleeve; 45-First electric cylinder;

[0025] 5-Fixing component; 51-Outer ring; 511-Drive gear; 512-Rotating annular groove; 52-Arc-shaped fixing plate; 53-Fixing electric cylinder; 54-Second motor; 55-Drive gear; 56-First rotating shaft; 57-L-shaped support column;

[0026] 6-Grinding assembly; 61-Third motor; 62-Second lead screw; 63-Second threaded sleeve; 64-Adjusting electric cylinder; 65-Fourth motor; 66-Second rotating shaft; 67-Grinding block;

[0027] 7-New cathode steel rod, 8-Old cathode steel rod. Detailed Implementation

[0028] The embodiments of the present invention will be described below with reference to relevant examples. The embodiments of the present invention are not limited to the following examples, and the present invention relates to relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0029] like Figures 1 to 5As shown, an electric welding device for cathode steel rods in an aluminum electrolysis cell includes a frame 1 and a welding assembly 2 disposed on top of the frame 1. Below the welding assembly 2, a welding auxiliary assembly 3 and a fixing assembly 5, both connected to the frame 1, are symmetrically arranged in sequence. The welding assembly 2 includes a crucible 21 disposed above the frame 1, with a guide tube 23 communicating at its bottom. Below the welding auxiliary assembly 3, a grinding assembly 6 connected to the frame 1 is disposed. The welding auxiliary assembly 3 includes a mounting cylinder 31 connected to the frame 1 and a welding cylinder 36 disposed within the mounting cylinder 31. The welding cylinder 36 includes a downward-facing... The semi-circular arc plate 32 with its concave surfaces facing each other is provided. Two welding cylinders 36 are horizontally coaxially spliced ​​together, forming a welding cavity 35 inside the splice. The welding cavity 35 is connected to the crucible 21 through the guide pipe 23. The outer convex surface of the semi-circular arc plate 32 is connected to a moving component 4, which is connected to the frame 1. The fixing component 5 includes an outer ring 51 and an arc-shaped fixing plate 52 disposed inside the outer ring 51 and distributed in a rotationally symmetrical manner. A fixing electric cylinder 53 connected to the arc-shaped fixing plate 52 passes through the outer ring 51. The fixing electric cylinder 53 and the arc-shaped fixing plate 52 are arranged in a one-to-one correspondence.

[0030] The welding assembly 2 of the present invention works in conjunction with the welding auxiliary assembly 3 to perform hot-melt welding of the new cathode steel rod 7 and the old cathode steel rod 8. The welding cylinder 36 of the welding auxiliary assembly 3 can stably fix and align the two steel rods, ensuring the accuracy and reliability of the welding. The crucible 21 guides the molten welding material through the guide tube 23 to accurately flow into the welding cavity 35, filling the gap between the two steel rods and forming a strong welded joint.

[0031] The welding cylinder 36 of the present invention is formed by two semi-circular arc plates 32 being spliced ​​together, which facilitates demolding after welding. The moving component 4 drives the semi-circular arc plate 32 to move inside the mounting cylinder 31 through components such as the first electric cylinder 45, thereby exposing the welding position and providing convenience for subsequent grinding and polishing. The grinding block 67 of the grinding component 6 can rotate and grind the surface of the weld in close contact, which effectively improves the grinding efficiency and grinding quality. The cooperation between the second lead screw 62 and the adjusting electric cylinder 64 allows the position and angle of the grinding block 67 to be flexibly adjusted to adapt to the shape and position of different welded joints.

[0032] The fixing component 5 of the present invention drives the arc-shaped fixing plate 52 to be tightly attached to the surface of the cathode steel rod by the fixing electric cylinder 53, thereby achieving stable clamping of the new cathode steel rod 7 and the old cathode steel rod 8, ensuring stability during the welding process, and also helping to improve the quality of the welded joint. The cooperation between the driving teeth 511 on the surface of the outer ring 51 and the driving gear 55 allows the outer ring 51 to rotate under the support of the L-shaped support column 57, so that the cathode steel rod that has been welded can rotate, thereby facilitating the grinding block 67 of the grinding component 6 to perform all-round grinding of the weld, further improving the grinding efficiency and grinding quality.

[0033] As one of the preferred embodiments of the present invention, such as Figure 1 As shown, the crucible 21 has symmetrical connecting plates 24 on its left and right sides. The connecting plates 24 are longitudinally provided with guide rods 26 that can slide freely up and down and are connected to one end of the frame 1. The guide rods 26 have a lifting cylinder 25 connected to the lower surface of the connecting plates 24 on the side away from the crucible 21. The top of the crucible 21 is provided with a lid 22 that is hinged to it. The side wall of the crucible 21 is provided with an ignition hole.

[0034] One end of the guide tube 23 is connected to the bottom of the crucible 21, and the other end is placed in the pouring channel 34 formed at the top of the joint of the two welding cylinders 36 after coaxial splicing and is connected to the welding cavity 35. A vent hole 33 is provided on the semi-circular arc plate 32 on one side of the pouring channel 34 to facilitate the smooth discharge of air in the welding cavity 35 during the welding process. The guide rod 26 is longitudinally inserted on the connecting plate 24 to ensure the stable vertical movement of the crucible 21, so that the lifting electric cylinder 25 can more accurately control the lifting height of the crucible 21, and the lower end of the guide tube 23 can accurately enter the pouring channel 34 and connect with the welding cavity 35, thereby ensuring that the molten welding material can accurately flow into the welding cavity 35. In addition, after the welding is completed, the lifting electric cylinder 25 can raise the height of the crucible 21 so that the guide tube 23 can be removed from the pouring channel 34.

[0035] As one of the preferred embodiments of the present invention, such as Figure 1 , Figure 3 and Figure 4 As shown, the semi-circular arc plate 32 has a second fastening edge 322 on one side near the welding cavity 35, and the front and rear sides of the semi-circular arc plate 32 have first fastening edges 321 connected to the semi-circular arc plate 32. The two ends of the second fastening edge 322 are respectively connected to the corresponding first fastening edge 321. The semi-circular arc plate 32 is provided with a plurality of fastening bolts 323, and adjacent first fastening edges 321 and adjacent second fastening edges 322 are respectively connected by fastening bolts 323.

[0036] The welding cylinder 36 of this invention is composed of two semi-circular arc plates 32. After being joined, the two welding cylinders 36 form a complete cylindrical cavity, namely a welding cavity 35. A second fastening edge 322 is provided on the side of one end of the semi-circular arc plate 32 closest to the welding cavity 35, for connecting the two opposing semi-circular arc plates 32, ensuring that they form a tight welding cylinder 36 after joining. Through the second fastening edge 322, the two semi-circular arc plates 32 can be firmly connected together, preventing loosening or deformation during welding. First fastening edges 321 are also provided on the front and rear sides of the semi-circular arc plates 32, connected to the inner and outer sides of the semi-circular arc plates 32, for use... The two semi-circular arc plates 32 connected within the same welding cylinder 36 are secured by a first fastening edge 321, ensuring a stable structure after assembly and further improving the sealing of the welding cavity 35. To more firmly connect the two semi-circular arc plates 32, several fastening bolts 323 are also provided in the structure. These bolts pass through holes between adjacent first fastening edges 321 and adjacent second fastening edges 322, respectively, to tightly fix the two semi-circular arc plates 32 together. The fastening bolts 323 further ensure the sealing and stability of the welding cavity 35, providing a strong guarantee for high-quality welding.

[0037] The cooperation of the second fastening edge 322 and the first fastening edge 321, along with the fixing effect of the fastening bolt 323, ensures that the welding cavity 35 remains sealed during the welding process. This helps prevent the molten welding material from leaking out and ensures the welding quality. The semi-circular plate 32 in the structure is connected as a whole by the fastening edge and the fastening bolt 323, which improves the stability of the welding process. After welding is completed, the fastening bolt 323 is turned off and removed from the second fastening edge 322 and the first fastening edge 321. Then, the semi-circular plate 32 can be moved by the first electric cylinder 45 and other components of the moving assembly 4, thereby demolding and exposing the welding position.

[0038] As one of the preferred embodiments of the present invention, such as Figure 1 As shown, the moving component 4 includes a first electric cylinder 45 connected to the outer convex surface of the semi-circular arc plate 32, a first threaded sleeve 44 connected to the first electric cylinder 45, a first lead screw 43 disposed inside the first threaded sleeve 44 and threadedly connected thereto, a mounting frame 41 symmetrically disposed on the left and right sides of the first lead screw 43 and connected to the frame 1, a first motor 42 connected to one end of the first lead screw 43 and mounted on the mounting frame 41, and the other end of the first lead screw 43 being rotatably connected to the mounting frame 41. The outer convex surface of the semi-circular arc plate 32 is longitudinally provided with a moving through groove 311 through which the first electric cylinder 45 can move.

[0039] The moving component 4 of the present invention drives the first lead screw 43 to rotate via the first motor 42, which in turn drives the first threaded sleeve 44 and the first electric cylinder 45 to move via threaded transmission. The extension and retraction of the first electric cylinder 45 pushes the semi-circular plate 32 to move along the direction of the moving through groove 311, thereby realizing the splicing and demolding operation of the semi-circular plate 32.

[0040] In the initial state, the first electric cylinder 45 is in a retracted state, and the semi-circular plate 32 is connected to the first electric cylinder 45 through the moving through groove 311. At this time, the two semi-circular plates 32 are located on both sides of the mounting cylinder 31, and a complete welding cavity 35 is not formed. When it is necessary to move the semi-circular plate 32 to form the welding cavity 35, the first motor 42 is started first. The power output shaft of the first motor 42 is connected to one end of the first lead screw 43, driving the first lead screw 43 to rotate. The rotation of the first lead screw 43 drives the first threaded sleeve 44, which is threadedly connected to it, to move linearly. Since the first threaded sleeve 44 is connected to the first electric cylinder 45, the first electric cylinder 45 will also move with the movement of the first threaded sleeve 44. As the first electric cylinder 45 moves, its piston rod begins to extend, pushing the semi-circular plate 32 to move along the direction of the moving through groove 311.

[0041] When the two semi-circular arc plates 32 are pushed to the outside of the mounting cylinder 31 by the first electric cylinder 45 and are joined together, a complete welding cavity 35 is formed. At this time, the ends of the new cathode steel rod 7 and the old cathode steel rod 8 that need to be welded are placed in the welding cavity 35. The operator then installs the fastening bolts 323 in the threaded holes between the adjacent first fastening edges 321 and the adjacent second fastening edges 322 to firmly fix the four semi-circular arc plates 32 together. This further ensures the sealing and stability of the welding cavity 35 and prepares it for subsequent welding.

[0042] After welding is completed, the semi-circular plates 32 need to be moved for demolding. At this time, the operator needs to remove the fastening bolts 323 from the welding cylinder 36. Then, the first electric cylinder 45 drives the two semi-circular plates 32 to separate from the new cathode steel rod 7 and the old cathode steel rod 8. Then, the first motor 42 reverses and drives the first lead screw 43 to rotate in the opposite direction. Through the thread transmission and the extension and retraction of the first electric cylinder 45, the semi-circular plates 32 will move in opposite directions, so that the four semi-circular plates 32 separate from each other and expose the welding position. After demolding, the grinding assembly 6 can grind and polish the exposed welding position.

[0043] It should be noted that the above operation is performed after the fixing component 5 has clamped the new cathode steel rod 7 and the old cathode steel rod 8. During the above process, the fixing component 5 maintains the state of clamping the new cathode steel rod 7 and the old cathode steel rod 8.

[0044] As one of the preferred embodiments of the present invention, such as Figure 1 and Figure 5 As shown, rotating annular grooves 512 are symmetrically arranged on the left and right sides of the outer ring 51. L-shaped support columns 57 that can slide inside the rotating annular grooves 512 on the left and right sides of the outer ring 51 are symmetrically arranged vertically. One end of the L-shaped support column 57 is placed in the rotating annular groove 512, and the other end of the L-shaped support column 57 is connected to the frame 1.

[0045] Furthermore, in the above structure, the outer surface of the outer ring 51 is provided with driving teeth 511, and a driving gear 55 capable of meshing and rotating with the driving teeth 511 is provided on one side below the outer ring 51. The driving gear 55 is connected to a first rotating shaft 56, which is rotatably connected to an L-shaped support column 57. A second motor 54 is provided on one side of the L-shaped support column 57. One end of the first rotating shaft 56 is connected to the power output shaft of the second motor 54, and the other end of the first rotating shaft 56 is connected to the driving gear 55.

[0046] Inside the outer ring 51, a fixed electric cylinder 53 connected to the arc-shaped fixed plate 52 is installed. The piston rod of the fixed electric cylinder 53 can extend or retract, thereby causing the arc-shaped fixed plate 52 to press against or loosen from the surface of the cathode steel rod. This design allows the fixing assembly 5 to stably and reliably clamp the cathode steel rod, ensuring that the cathode steel rod will not move or deflect during welding. One end of the L-shaped support column 57 is placed in the rotating annular groove 512 and can slide in the groove, thereby allowing the outer ring 51 to rotate smoothly under the support of the L-shaped support column 57. At the same time, the other end of the L-shaped support column 57 is connected to the frame 1, further enhancing the stability of the outer ring 51. The outer surface of the outer ring 51 is provided with drive teeth 511, which are connected to the drive gear 55 below. When the drive gear 55 rotates, it drives the outer ring 51 to rotate through the meshing action. The power output shaft of the second motor 54 is connected to one end of the first rotating shaft 56. When the second motor 54 starts, it drives the drive gear 55 to rotate through the first rotating shaft 56. Since the drive gear 55 meshes with the drive teeth 511 of the outer ring 51, the outer ring 51 will also rotate, thereby driving the cathode steel rod clamped inside the outer ring 51 to rotate together, which facilitates the grinding and polishing work of the welded joint in conjunction with the grinding assembly 6.

[0047] As one of the preferred embodiments of the present invention, such as Figure 1 and Figure 2As shown, the grinding assembly 6 includes a grinding block 67, a second rotating shaft 66 connected to the grinding block 67, a fourth motor 65 connected to the second rotating shaft 66, an adjusting electric cylinder 64 connected to the fourth motor 65, a second threaded sleeve 63 connected to the adjusting electric cylinder 64, a second lead screw 62 disposed inside the second threaded sleeve 63 and threadedly connected, and a third motor 61 connected to one end of the second lead screw 62. One end of the second rotating shaft 66 is connected to the power output shaft of the fourth motor 65, and the other end of the second rotating shaft 66 is connected to the grinding block 67. The grinding block 67 is disposed directly below the welding cavity 35.

[0048] The grinding block 67 is connected to the power output shaft of the fourth motor 65 via the second rotating shaft 66. The fourth motor 65 can drive the grinding block 67 to rotate, thereby realizing the grinding operation of the weld. In order to adjust the position of the grinding block 67 at the weld and the grinding force, the grinding assembly 6 is also equipped with components such as the adjusting electric cylinder 64 and the second threaded sleeve 63. The adjusting electric cylinder 64 can adjust the grinding force of the grinding block 67 on the weld by telescopic movement. The second threaded sleeve 63 is threadedly connected to the second lead screw 62. When the third motor 61 drives the second lead screw 62 to rotate, the second threaded sleeve 63 will move linearly along the second lead screw 62, thereby changing the relative position of the grinding block 67 and the weld.

[0049] When the grinding assembly 6 and the fixing assembly 5 work together, they can perform all-round grinding of the weld joint. The fixing assembly 5 can stably hold one end of the new cathode steel rod 7 and the old cathode steel rod 8 through its internal arc-shaped fixing plate 52 and fixing electric cylinder 53, ensuring that they will not move or deflect during the grinding process. At the same time, the engagement of the drive teeth 511 on the surface of the outer ring 51 with the drive gear 55 allows the outer ring 51 to rotate under the support of the L-shaped support column 57, so that the grinding block 67 of the grinding assembly 6 can perform uniform grinding along the circumference of the weld joint, thereby eliminating various defects and unevenness that may occur during the welding process.

[0050] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An electric welding device for cathode steel bars in an aluminum electrolysis cell, comprising a frame (1) and a welding assembly (2) disposed on top of the frame (1), characterized in that, Below the welding assembly (2), a welding auxiliary assembly (3) and a fixing assembly (5) connected to the frame (1) are symmetrically arranged in sequence. The welding assembly (2) includes a crucible (21) arranged above the frame (1). The bottom of the crucible (21) is provided with a connecting guide tube (23). Below the welding auxiliary assembly (3), a grinding assembly (6) connected to the frame (1) is arranged. The welding auxiliary assembly (3) includes a mounting cylinder (31) connected to the frame (1) and a welding cylinder (36) arranged inside the mounting cylinder (31). The welding cylinder (36) includes a semi-circular arc plate (32) arranged symmetrically downward and with opposite concave surfaces. The two welding cylinders (36) are horizontally coaxially spliced ​​together and the two welding cylinders (36) are located inside the splice. A welding cavity (35) is formed, which is connected to the crucible (21) through a guide tube (23). A moving component (4) is connected to the convex surface of the semi-circular arc plate (32). The moving component (4) is connected to the frame (1). The fixing component (5) includes an outer ring (51) and an arc-shaped fixing plate (52) arranged inside the outer ring (51) and distributed in a rotationally symmetrical manner. A fixing electric cylinder (53) connected to the arc-shaped fixing plate (52) is inserted inside the outer ring (51). The fixing electric cylinder (53) and the arc-shaped fixing plate (52) are arranged one-to-one. A connecting plate (24) is symmetrically arranged on the left and right sides of the crucible (21). The connecting plate (24) is longitudinally inserted with a sliding part that can slide freely up and down. The guide rod (26) is connected to one end of the frame (1). The guide rod (26) is provided with a lifting electric cylinder (25) connected to the lower surface of the connecting plate (24) on the side away from the crucible (21). The top of the crucible (21) is provided with a lid (22) hinged to it. The side wall of the crucible (21) is provided with an ignition hole. The side of the semi-circular plate (32) near the welding cavity (35) is provided with a second fastening edge (322). The front and rear sides of the semi-circular plate (32) are provided with a first fastening edge (321) connected to the semi-circular plate (32). The two ends of the second fastening edge (322) are respectively connected to the corresponding first fastening edge (321). The semi-circular plate (32) is provided with a number of fastening bolts (3). 23), the adjacent first fastening edge (321) and the adjacent second fastening edge (322) are respectively connected by fastening bolts (323). The moving component (4) includes a first electric cylinder (45) connected to the outer convex surface of the semi-circular plate (32), a first threaded sleeve (44) connected to the first electric cylinder (45), a first lead screw (43) disposed inside the first threaded sleeve (44) and threadedly connected thereto, a mounting frame (41) symmetrically disposed on the left and right sides of the first lead screw (43) and connected to the frame (1), and a first motor (42) connected to one end of the first lead screw (43) and mounted on the mounting frame (41). The other end of the first lead screw (43) is rotatably connected to the mounting frame (41).The semi-circular plate (32) has a longitudinally penetrating groove (311) through which the first electric cylinder (45) moves.

2. The electric welding device for cathode steel rods in an aluminum electrolysis cell according to claim 1, characterized in that, The outer ring (51) has symmetrically arranged rotating annular grooves (512) on its left and right sides. L-shaped support columns (57) that can slide inside the rotating annular grooves (512) on the left and right sides of the outer ring (51) are symmetrically arranged. One end of the L-shaped support column (57) is placed in the rotating annular groove (512), and the other end of the L-shaped support column (57) is connected to the frame (1).

3. The device for live welding of cathode steel rods in an aluminum electrolysis cell according to claim 1, characterized in that, The outer surface of the outer ring (51) is provided with drive teeth (511), and a drive gear (55) that can mesh and rotate with the drive teeth (511) is provided on one side below the outer ring (51). The drive gear (55) is connected to a first rotating shaft (56). The first rotating shaft (56) is rotatably connected to an L-shaped support column (57). A second motor (54) is provided on one side of the L-shaped support column (57). One end of the first rotating shaft (56) is connected to the power output shaft of the second motor (54), and the other end of the first rotating shaft (56) is connected to the drive gear (55).

4. The electric welding device for cathode steel rods in an aluminum electrolysis cell according to claim 1, characterized in that, The grinding assembly (6) includes a grinding block (67), a second rotating shaft (66) connected to the grinding block (67), a fourth motor (65) connected to the second rotating shaft (66), an adjusting electric cylinder (64) connected to the fourth motor (65), a second threaded sleeve (63) connected to the adjusting electric cylinder (64), a second lead screw (62) disposed inside the second threaded sleeve (63) and threadedly connected, and a third motor (61) connected to one end of the second lead screw (62). One end of the second rotating shaft (66) is connected to the power output shaft of the fourth motor (65), and the other end of the second rotating shaft (66) is connected to the grinding block (67). The grinding block (67) is disposed directly below the welding cavity (35).

Images