Electrified welding device for cathode steel bar of aluminum electrolysis cell

Abstract

The invention relates to the technical field of welding equipment, and particularly discloses an aluminum electrolysis cell cathode steel bar electrified welding device which comprises a rack and a welding assembly arranged at the top of the rack, and a welding auxiliary assembly and a fixing assembly which are connected with the rack are sequentially and symmetrically arranged below the welding assembly. A polishing assembly connected with the rack is arranged below the welding auxiliary assembly. New and old cathode steel bars are in butt joint and welded through the fixing device and the auxiliary welding device, the situation that the welding strength is not high or the welding position deviates is avoided, the welding quality and the percent of pass are improved, the welding auxiliary assembly is of a detachable semi-arc plate structure, and after welding is completed, the welding quality is improved. The semi-arc plate can be conveniently moved away through the moving assembly, so that a welding part is exposed, subsequent grinding and polishing work is facilitated, the operation convenience is effectively improved, manual intervention is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, and in particular to a live welding device for cathode steel bars of an aluminum electrolytic cell. Background Art

[0002] Aluminum electrolytic cells are the core equipment for electrolytic aluminum production. Their cathode steel bars have the dual functions of conducting electricity and providing structural support. During the overhaul of the electrolytic cells, the old steel bars need to be cut and replaced, and the new and old steel bars need to be connected by welding to maintain the continuity of the current circuit. In traditional processes, steel bar welding needs to be carried out under power outage conditions, but power outages will cause the aluminum electrolytic cells to suspend operation, resulting in economic losses. In addition, when using traditional welding methods, the strong magnetic field generated when the electrolytic cell is in operation will cause the welding molten pool to be unstable, molten iron to splash, and affect the quality of the weld. 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 situation, in the prior art, a patent with announcement number CN115283819A discloses a live welding system for cathode steel bars of an aluminum electrolytic cell, comprising an electrolytic cell body, wherein a plurality of old cathode steel bars are arranged side by side in the electrolytic cell body, and the welding system also comprises a docking device for assisting in welding a new cathode steel bar of equal diameter to the end surface of the old cathode steel bar after it is cut off, the docking device comprises a sleeve, a blocking mechanism, a first clamp and a second clamp, a displacement driving device is provided on the electrolytic cell body, the displacement driving device and the sleeve are connected by a support frame, a clamp driver is provided on the sleeve, and a welding device is provided on the support frame. The present invention positions the new cathode steel bar and the old cathode steel bar by the first clamp and the second clamp to ensure stability and accurate alignment of the two during welding, and spaces the two by the blocking mechanism so that a gap is left between the two for the inflow of molten metal, thereby ensuring accurate welding between the two, avoiding the occurrence of low welding strength or welding position offset, and improving the qualified rate.

[0004] However, although the system can complete the welding of cathode steel bars without powering off the aluminum electrolytic cell, thereby improving production efficiency and ease of operation, there are still some problems that need to be solved. First, the above-mentioned welding system cannot grind the welding parts. Second, the above-mentioned welding system welds the new and old cathode steel bars in an inseparable sleeve of the docking device. After the welding is completed, it is not easy to remove the cathode steel bar from the sleeve of the docking device. Summary of the invention

[0005] In view of the technical defects existing in the background technology, the present invention proposes a live welding device for cathode steel bars of aluminum electrolysis cells, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows: A live welding device for cathode steel bars of an aluminum electrolytic cell comprises a frame and a welding assembly arranged on the top of the frame, wherein a welding auxiliary assembly and a fixed assembly connected to the frame are symmetrically arranged in sequence below the welding assembly, the welding assembly is provided with a crucible above the frame, a communicating guide tube is provided at the bottom of the crucible, a grinding assembly connected to the frame is provided below the welding auxiliary assembly, the welding auxiliary assembly comprises a mounting cylinder connected to the frame, a welding cylinder arranged in the mounting cylinder, the welding cylinder comprises a semicircular arc plate symmetrically arranged downward and having opposite inner concave surfaces, two welding cylinders are coaxially spliced ​​transversely and form a welding cavity inside the splicing, the welding cavity is communicated with the crucible through the guide tube, a moving assembly is correspondingly connected to the outer convex surface of the semicircular arc plate, the moving assembly is connected to the frame, the fixed assembly comprises an outer ring, an arc-shaped fixed plate arranged inside the outer ring and distributed in rotational symmetry, a fixed electric cylinder connected to the arc-shaped fixed plate is penetrated inside the outer ring, and the fixed electric cylinder and the arc-shaped fixed plate are arranged in a one-to-one correspondence.

[0006] As a further technical solution of the present invention, connecting plates are symmetrically arranged on the left and right sides of the crucible, and a guide rod that can slide freely up and down and is connected to a frame at one end is longitudinally penetrated through the connecting plate, and a lifting electric cylinder connected to the lower surface of the connecting plate is provided on the side of the guide rod away from the crucible, and a pot cover hinged thereto is provided on the top of the crucible, and an ignition hole is penetrated through the side wall of the crucible.

[0007] As a further technical solution of the present invention, a second fastening edge is provided on the side of one end of the semicircular arc plate close to the welding cavity, a first fastening edge connected to the semicircular arc plate is provided on the front and rear sides of the semicircular arc plate, both ends of the second fastening edge are respectively connected to the corresponding first fastening edges, the semicircular 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.

[0008] 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 arranged inside the first threaded sleeve and threadedly connected thereto, a mounting frame symmetrically arranged 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 is rotatably connected to the mounting frame, and the outer convex surface of the semi-circular arc plate is longitudinally penetrated by a movable through groove for allowing the first electric cylinder to move inside it.

[0009] As a further technical solution of the present invention, rotating annular grooves are symmetrically arranged on the left and right side surfaces of the outer ring, and L-shaped support columns that can slide inside the rotating annular grooves on the left and right side surfaces of the outer ring are symmetrically arranged up and down, 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.

[0010] As a further technical solution of the present invention, the outer surface of the outer ring is provided with driving teeth, and the side below the outer ring is provided with a driving gear that can mesh and rotate with the driving teeth, 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 a power output shaft of the second motor, and the other end of the first rotating shaft is connected to the driving gear.

[0011] As a further technical solution of the present invention, the grinding assembly includes a grinding block, a second rotating shaft of 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 arranged 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, and the grinding block is arranged directly below the welding chamber.

[0012] The beneficial effects of the present invention are: By setting up the cooperation of welding components, welding auxiliary components and fixed components, efficient welding of cathode steel bars of aluminum electrolytic cells can be achieved. The welding cylinder of the welding auxiliary component enables the new cathode steel bar and the old cathode steel bar to be conveniently fixed and coaxially spliced ​​to form a welding cavity, thereby ensuring the accuracy of welding. The moving component can drive the semi-circular arc plate to move flexibly, thereby facilitating demoulding after welding is completed and exposing the welding position, thereby providing convenience for subsequent grinding and polishing. The grinding component can accurately adjust the position and rotation speed of the grinding block to ensure high-quality grinding and polishing of the weld. The fixed component can stably clamp the new cathode steel bar and the old cathode steel bar through the coordinated use of the fixed electric cylinder and the arc-shaped fixed plate to ensure stability during the welding process. The fixed component enables the outer ring to rotate smoothly through the coordination of the outer ring and the drive gear, as well as the supporting effect of the L-shaped support column, thereby driving the welded cathode steel bar to rotate, thereby further facilitating the grinding block of the grinding component to perform all-round grinding of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of the internal structure of the present invention.

[0014] Figure 2 For along Figure 1 A partial enlarged schematic diagram of the AA area in the middle.

[0015] Figure 3 It is a schematic diagram of the three-dimensional structure of the welding auxiliary component of the present invention.

[0016] Figure 4 It is a schematic diagram of the three-dimensional structure of the semicircular arc plate of the present invention.

[0017] Figure 5 It is a schematic diagram of the three-dimensional structure of the fixing assembly of the present invention.

[0018] Reference numerals: 1- rack; 2-welding assembly; 21-crucible; 22-pot cover; 23-guide tube; 24-connecting plate; 25-lifting electric cylinder; 26-guide rod; 3-welding auxiliary assembly; 31-installation cylinder; 311-movable through slot; 32-semicircular arc plate; 321-first fastening edge; 322-second fastening edge; 323-fastening bolt; 33-vent hole, 34-infusion channel; 35-welding cavity; 36-welding cylinder; 4-moving assembly; 41-mounting frame; 42-first motor; 43-first lead screw; 44-first threaded sleeve; 45-first electric cylinder; 5-fixed component; 51-outer ring; 511-driving tooth; 512-rotating annular groove; 52-arc-shaped fixed plate; 53-fixed electric cylinder; 54-second motor; 55-driving gear; 56-first rotating shaft; 57-L-shaped support column; 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; 7-new cathode steel rod, 8-old cathode steel rod. DETAILED DESCRIPTION

[0019] The implementation mode of the present invention is described below in conjunction with relevant embodiments. The implementation mode of the present invention is not limited to the following embodiments, and the present invention relates to relevant necessary components in the technical field, which should be regarded as the known technology in the technical field and can be known and mastered by the technical personnel in the technical field.

[0020] like Figures 1 to 5As shown, a live welding device for cathode steel bars of an aluminum electrolytic cell comprises a frame 1 and a welding assembly 2 arranged on the top of the frame 1, a welding auxiliary assembly 3 and a fixing assembly 5 connected to the frame 1 are symmetrically arranged below the welding assembly 2 in sequence, the welding assembly 2 is provided with a crucible 21 above the frame 1, a communicating guide pipe 23 is provided at the bottom of the crucible 21, a grinding assembly 6 connected to the frame 1 is arranged below the welding auxiliary assembly 3, the welding auxiliary assembly 3 comprises a mounting cylinder 31 connected to the frame 1, a welding cylinder 36 arranged in the mounting cylinder 31, and the welding cylinder 36 comprises a mounting cylinder 31 connected to the frame 1 and a fixing cylinder 36 arranged in the mounting cylinder 31, and the welding cylinder 36 comprises a mounting cylinder 31 connected to the frame 1 and a fixing cylinder 36 arranged in the mounting cylinder 31, and the fixing ... A semicircular arc plate 32 is arranged with the inner concave surfaces facing each other, the two welding cylinders 36 are coaxially spliced ​​transversely and form a welding cavity 35 inside the splicing part, the welding cavity 35 is connected with the crucible 21 through the guide tube 23, the outer convex surface of the semicircular arc plate 32 is correspondingly connected with a moving component 4, the moving component 4 is connected to the frame 1, the fixed component 5 includes an outer ring 51, and an arc-shaped fixed plate 52 arranged inside the outer ring 51 and distributed in rotational symmetry, a fixed electric cylinder 53 connected to the arc-shaped fixed plate 52 is penetrated inside the outer ring 51, and the fixed electric cylinder 53 is arranged one-to-one with the arc-shaped fixed plate 52.

[0021] The welding assembly 2 of the present invention works in conjunction with the welding auxiliary assembly 3 to perform hot-melt welding on the new cathode steel rod 7 and the old cathode steel rod 8. The welding tube 36 of the welding auxiliary assembly 3 can stably fix and align the two steel rods to ensure the accuracy and reliability of welding. The crucible 21 can accurately flow the molten welding material into the welding cavity 35 through the guide tube 23 to fill the gap between the two steel rods to form a firm welding joint.

[0022] The welding cylinder 36 of the present invention is formed by two upper and lower semi-circular arc plates 32 relatively assembled together, so as to facilitate demolding after welding is completed. The moving component 4 drives the semi-circular arc plate 32 to move in the mounting cylinder 31 through the first electric cylinder 45 and other components, thereby exposing the welding position, which provides convenience for subsequent grinding and polishing. The grinding block 67 of the grinding component 6 can be rotated and ground closely to the surface of the welding position, effectively improving the grinding efficiency and grinding quality. The coordinated use of 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 shapes and positions of different welding joints.

[0023] The fixing assembly 5 of the present invention drives the arc-shaped fixing plate 52 to be tightly attached to the surface of the cathode steel rod through 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 welding, and also helping to improve the quality of the welded joint. The driving teeth 511 on the surface of the outer ring 51 cooperate with the driving gear 55, so that the outer ring 51 can rotate under the support of the L-shaped support column 57, so that the cathode steel rod that has completed welding can rotate, thereby facilitating the grinding block 67 of the grinding assembly 6 to perform all-round grinding of the welding point, further improving the grinding efficiency and grinding quality.

[0024] As one of the preferred embodiments of the present invention, Figure 1 As shown, connecting plates 24 are symmetrically arranged on the left and right sides of the crucible 21, and a guide rod 26 that can slide freely up and down and is connected to the frame 1 at one end is longitudinally penetrated by the connecting plate 24, and a lifting electric cylinder 25 connected to the lower surface of the connecting plate 24 is provided on the side of the guide rod 26 away from the crucible 21. A pot cover 22 hinged to the top of the crucible 21 is provided, and an ignition hole is penetrated by the side wall of the crucible 21.

[0025] One end of the guide tube 23 is connected to the bottom of the crucible 21, and the other end is placed in the injection channel 34 formed at the top of the joint where two welding tubes 36 are coaxially spliced ​​and is connected to the welding chamber 35. A vent 33 is provided on the semi-circular arc plate 32 on one side of the injection channel 34 to facilitate the smooth discharge of air in the welding chamber 35 during the welding process. The guide rod 26 is longitudinally penetrated on the connecting plate 24 to ensure the stable movement of the crucible 21 in the vertical direction, so that the lifting electric cylinder 25 can more accurately control the lifting height of the crucible 21, so that the lower end of the guide tube 23 can accurately enter the injection channel 34 and communicate with the welding chamber 35, thereby ensuring that the molten welding material can accurately flow into the welding chamber 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 separated from the injection channel 34.

[0026] As one of the preferred embodiments of the present invention, Figure 1 , Figure 3 and Figure 4 As shown, the semicircular plate 32 is provided with a second fastening edge 322 on the side of one end close to the welding cavity 35, and the front and rear sides of the semicircular plate 32 are provided with a first fastening edge 321 connected to the semicircular plate 32, and the two ends of the second fastening edge 322 are respectively connected to the corresponding first fastening edge 321, and the semicircular plate 32 is provided with a plurality of fastening bolts 323, and the adjacent first fastening edges 321 and the adjacent second fastening edges 322 are respectively connected by fastening bolts 323.

[0027] The welding tube 36 of the present invention is composed of two semi-circular plates 32. The two welding tubes 36 can form a complete cylindrical cavity, i.e., a welding cavity 35, after being assembled. A second fastening edge 322 is provided on the side of one end of the semi-circular plate 32 close to the welding cavity 35, which is used to connect the two opposite semi-circular plates 32 to ensure that they form a tight welding tube 36 after being assembled. Through the second fastening edge 322, the two semi-circular plates 32 can be firmly connected together to prevent loosening or deformation during the welding process. The front and rear sides of the semi-circular plate 32 are also provided with a first fastening edge 321 connected to the semi-circular plate 32, and are located on the inner and outer sides of the semi-circular plate 32, so as to prevent loosening or deformation during welding. For connecting two semi-circular arc plates 32 in the same welding tube 36, the first fastening edge 321 can ensure that the two semi-circular arc plates 32 in the same welding tube 36 maintain a stable structure after being assembled, further improving the sealing of the welding cavity 35. In order to more firmly connect the two semi-circular arc plates 32, a plurality of fastening bolts 323 are also provided in the structure. These bolts pass through the holes between adjacent first fastening edges 321 and between adjacent second fastening edges 322, respectively, to tightly fix the two semi-circular arc plates 32 together. By fastening the bolts 323, the sealing and stability of the welding cavity 35 can be further ensured, providing a strong guarantee for high-quality welding.

[0028] Through the cooperation between the second fastening edge 322 and the first fastening edge 321, and the fixing effect of the fastening bolt 323, the welding chamber 35 can be kept sealed during the welding process, which helps to prevent the molten welding material from leaking out and ensure the welding quality. The semi-circular arc plate 32 in the structure is connected into a whole through the fastening edge and the fastening bolt 323, which improves the stability of the welding process. After the welding is completed, the fastening bolt 323 is screwed and removed from the second fastening edge 322 and the first fastening edge 321, and then the semi-circular arc plate 32 can be driven to move by the first electric cylinder 45 and other components of the moving component 4, so as to demold and expose the welding position.

[0029] As one of the preferred embodiments of the present invention, Figure 1 As shown, 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 arranged inside the first threaded sleeve 44 and threadedly connected thereto, a mounting frame 41 symmetrically arranged 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, and a moving through groove 311 is longitudinally penetrated through the outer convex surface of the semi-circular plate 32 for the first electric cylinder 45 to move inside it.

[0030] The moving assembly 4 of the present invention drives the first lead screw 43 to rotate through the first motor 42, and then drives the first threaded sleeve 44 and the first electric cylinder 45 to move through the thread transmission. The telescopic action of the first electric cylinder 45 pushes the semicircular plate 32 to move along the direction of the moving through groove 311, thereby realizing the splicing and demoulding operations of the semicircular plate 32.

[0031] 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 movable groove 311. At this time, the two semi-circular plates 32 are respectively located on both sides of the mounting tube 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 first started, and the power output shaft of the first motor 42 is connected to one end of the first lead screw 43 to drive the first lead screw 43 to rotate. The rotation of the first lead screw 43 drives the first threaded sleeve 44 threadedly connected thereto to move linearly through thread transmission. 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 movable groove 311.

[0032] When the two semi-circular arc plates 32 are pushed to the outside of the mounting tube 31 by the first electric cylinder 45 and assembled with each other, a complete welding cavity 35 can be formed. At this time, the ends of the new cathode steel rod 7 and the old cathode steel rod 8 to be welded are respectively placed in the welding cavity 35. At this time, the operator installs the fastening bolts 323 in the threaded holes between the adjacent first fastening edges 321 and the adjacent second fastening edges 322 respectively, and fixes the four semi-circular arc plates 32 tightly together, which can further ensure the sealing and stability of the welding cavity 35 and prepare for subsequent welding.

[0033] After welding is completed, the semi-circular plate 32 needs to be moved for demolding. At this time, the operator needs to remove the fastening bolt 323 from the welding tube 36, and 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, and then the first motor 42 reverses to drive the first lead screw 43 to rotate in the opposite direction. Through the threaded transmission and the telescopic action of the first electric cylinder 45, the semi-circular plate 32 will move in the opposite direction, so that the four semi-circular plates 32 are separated from each other and the welding position is exposed. After demolding, the grinding assembly 6 can grind and polish the exposed welding position.

[0034] It should be noted that the above operation process is performed after the fixing assembly 5 completes clamping of the new cathode steel bar 7 and the old cathode steel bar 8 . During the above process, the fixing assembly 5 always maintains the state of the new cathode steel bar 7 and the old cathode steel bar 8 .

[0035] As one of the preferred embodiments of the present invention, Figure 1 and Figure 5 As shown, rotating annular grooves 512 are symmetrically arranged on the left and right side surfaces of the outer ring 51, and L-shaped support columns 57 capable of sliding inside the rotating annular grooves 512 on the left and right side surfaces of the outer ring 51 are symmetrically arranged up and down, 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.

[0036] Furthermore, in the above structure, a driving tooth 511 is provided on the outer surface of the outer ring 51, and a driving gear 55 capable of engaging and rotating with the driving tooth 511 is provided on one side below the outer ring 51. The driving gear 55 is connected to a first rotating shaft 56, and 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, and one end of the first rotating shaft 56 is connected to a 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.

[0037] Inside the outer ring 51, there is a fixed electric cylinder 53 connected to the arc-shaped fixed plate 52. The piston rod of the fixed electric cylinder 53 can be extended or retracted, thereby driving the arc-shaped fixed plate 52 to be close to or loose from the surface of the cathode steel bar. This design allows the fixing component 5 to stably and reliably clamp the cathode steel bar, ensuring that the cathode steel bar will not move or deflect during the welding process. 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 a driving tooth 511, and the driving tooth 511 is connected to the driving gear 55 below. When the driving gear 55 rotates, the outer ring 51 is driven 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 is started, the second motor 54 drives the driving gear 55 to rotate through the first rotating shaft 56. Since the driving gear 55 is meshed with the driving teeth 511 of the outer ring 51, the outer ring 51 will also rotate accordingly, thereby driving the cathode steel rod clamped inside the outer ring 51 to rotate together, so as to facilitate the cooperation with the grinding component 6 to carry out the grinding and polishing work of the welding point.

[0038] As one of the preferred embodiments of the present invention, 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 arranged 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, and the grinding block 67 is arranged directly below the welding cavity 35.

[0039] The grinding block 67 is connected to the power output shaft of the fourth motor 65 through the second rotating shaft 66. The fourth motor 65 can drive the grinding block 67 to rotate, thereby realizing the grinding operation on the welding point. In order to adjust the position and grinding force of the grinding block 67 at the welding point, the grinding assembly 6 is also equipped with components such as an adjusting electric cylinder 64 and a second threaded sleeve 63. The adjusting electric cylinder 64 can adjust the grinding force of the welding point by the grinding block 67 through telescopic movement. The interior of 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 welding point.

[0040] When the grinding component 6 cooperates with the fixing component 5, all-round grinding processing of the welding point can be achieved. The fixing component 5 can stably clamp 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 fixed electric cylinder 53 and other components to ensure that they will not move or deflect during the grinding process. At the same time, the driving teeth 511 on the surface of the outer ring 51 cooperate with the driving gear 55 so that the outer ring 51 can rotate under the support of the L-shaped support column 57, so that the grinding block 67 of the grinding component 6 can be evenly ground along the circumferential direction of the welding joint, thereby eliminating various defects and unevenness that may occur during the welding process.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A live welding device for cathode steel bars of an aluminum electrolytic cell, comprising a frame (1) and a welding assembly (2) arranged on the top of the frame (1), characterized in that: A welding auxiliary component (3) and a fixing component (5) connected to the frame (1) are symmetrically arranged in sequence below the welding component (2); a crucible (21) is arranged above the frame (1) on the welding component (2); a communicating guide tube (23) is arranged at the bottom of the crucible (21); a grinding component (6) connected to the frame (1) is arranged below the welding auxiliary component (3); the welding auxiliary component (3) comprises a mounting cylinder (31) connected to the frame (1); a welding cylinder (36) arranged in the mounting cylinder (31); the welding cylinder (36) comprises a semicircular arc plate (32) symmetrically arranged downward and with opposite inner concave surfaces; the two The welding cylinders (36) are coaxially spliced ​​transversely and form a welding cavity (35) inside the splicing portion; the welding cavity (35) is communicated with the crucible (21) via a guide tube (23); a moving assembly (4) is correspondingly connected to the outer convex surface of the semicircular arc plate (32); the moving assembly (4) is connected to the frame (1); the fixed assembly (5) comprises an outer ring (51) and an arc-shaped fixed plate (52) arranged inside the outer ring (51) and distributed in a rotationally symmetrical manner; a fixed electric cylinder (53) connected to the arc-shaped fixed plate (52) is penetrated inside the outer ring (51); the fixed electric cylinder (53) and the arc-shaped fixed plate (52) are arranged in a one-to-one correspondence.

2. The live welding device for cathode steel bars of aluminum electrolysis cell according to claim 1, characterized in that: Connecting plates (24) are symmetrically arranged on the left and right sides of the crucible (21); a guide rod (26) is longitudinally penetrated through the connecting plate (24) and is able to slide freely up and down and is connected to the frame (1) at one end; a lifting electric cylinder (25) connected to the lower surface of the connecting plate (24) is arranged on the side of the guide rod (26) away from the crucible (21); a pot cover (22) is hingedly connected to the top of the crucible (21); and an ignition hole is penetrated through the side wall of the crucible (21).

3. The live welding device for cathode steel bars of aluminum electrolysis cell according to claim 1, characterized in that: A second fastening edge (322) is provided on the side edge of one end of the semicircular plate (32) close to the welding cavity (35); first fastening edges (321) connected to the semicircular plate (32) are provided on the front and rear sides of the semicircular plate (32); both ends of the second fastening edge (322) are respectively connected to the corresponding first fastening edges (321); the semicircular plate (32) is provided with a plurality of fastening bolts (323); adjacent first fastening edges (321) and adjacent second fastening edges (322) are respectively connected via fastening bolts (323).

4. The live welding device for cathode steel bars of aluminum electrolysis cell according to claim 1, characterized in that: The moving assembly (4) comprises a first electric cylinder (45) connected to the outer convex surface of the semicircular plate (32), a first threaded sleeve (44) connected to the first electric cylinder (45), a first lead screw (43) arranged inside the first threaded sleeve (44) and threadedly connected thereto, a mounting frame (41) symmetrically arranged 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) being rotatably connected to the mounting frame (41), and a moving through groove (311) for allowing the first electric cylinder (45) to move inside the outer convex surface of the semicircular plate (32) being longitudinally penetrated.

5. The live welding device for cathode steel bars of aluminum electrolysis cell according to claim 1, characterized in that: Rotating annular grooves (512) are symmetrically arranged on the left and right sides of the outer ring (51), and L-shaped support columns (57) capable of sliding inside the rotating annular grooves (512) are symmetrically arranged up and down in the rotating annular grooves (512) on the left and right side surfaces of the outer ring (51), 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).

6. The live welding device for cathode steel bars of aluminum electrolysis cell according to claim 1, characterized in that: The outer surface of the outer ring (51) is provided with a driving tooth (511), and a driving gear (55) capable of meshing and rotating with the driving tooth (511) is provided on one side below the outer ring (51), and the driving gear (55) is connected to a first rotating shaft (56), and the first rotating shaft (56) is rotatably connected to an L-shaped support column (57), and 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 a 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).

7. The live welding device for cathode steel bars of aluminum electrolysis cell according to claim 1, characterized in that: The grinding assembly (6) comprises 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) arranged 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 a power output shaft of the fourth motor (65); the other end of the second rotating shaft (66) is connected to the grinding block (67); and the grinding block (67) is arranged directly below the welding chamber (35).

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