Aluminum electrolysis cell electrified welding device with external magnetic field shielding function

Abstract

The invention discloses an aluminum electrolysis cell electrified welding device with an external magnetic field shielding function, and belongs to the technical field of aluminum electrolysis cell electrified welding, the aluminum electrolysis cell electrified welding device comprises a fixing support, a welding mechanism and a magnetic field shielding mechanism, the welding mechanism is arranged at the top of the fixing support and extends outwards, and a welding gun is arranged at the end of the welding mechanism; the magnetic field shielding mechanism is arranged at the end of the welding mechanism; the magnetic field shielding mechanism comprises a shielding shell, the shielding shell is hollow and forms a shielding cavity, a welding inlet is formed in one side of the shielding shell, inlet baffles are arranged on the two sides of the welding inlet, a first moving mechanism is arranged on one side of each inlet baffle, and wrapping openings and wrapping baffles are arranged at the top and the bottom of the shielding shell. A second moving mechanism enabling the package baffle to move towards the center of the package opening is arranged on one side of the package baffle. The welding gun is arranged on the side, away from the welding inlet, in the shielding cavity. The electrified welding quality of the aluminum electrolysis cell is improved by shielding an external magnetic field.

Description

Technical Field

[0001] The invention relates to the technical field of live welding of aluminum electrolytic cells, and in particular to a live welding device for aluminum electrolytic cells with an external magnetic field shielding function. Background Art

[0002] During the long-term operation of the aluminum electrolytic cell, the aluminum busbar may be damaged due to corrosion, wear, fracture and other factors. At present, welding is often used to repair the aluminum busbar, which can ensure that the connection between the aluminum busbars is tight and firm, thereby reducing the contact resistance and improving the conductivity to ensure the normal operation of the electrolytic cell. Since the aluminum electrolytic cell will generate a strong magnetic field during operation, it is impossible to weld normally. In the traditional process, the aluminum busbar will be repaired by welding after power outage. However, it takes a lot of electricity to restart the aluminum electrolytic cell after power outage, resulting in energy waste and reduced production capacity. At present, the power outage welding repair of the aluminum busbar has been gradually abandoned, and it is replaced by live welding. The more common way of live welding of aluminum electrolytic cells is to weld after shielding the magnetic field. Usually, a magnetic field shielding cover is made of a material that can shield the magnetic field, and the magnetic field shielding cover is wrapped outside the welding part, and then the welding operation is performed. However, there are large differences in the structures of different aluminum electrolytic cells, and it is difficult to match aluminum electrolytic cells with different structures and form a good wrapping of the welding part, resulting in the welding process still being affected by the magnetic field and reducing the welding quality.

[0003] Based on the above situation, a Chinese patent with announcement number CN104827172A discloses an anti-magnetic shielding device for repairing and welding the horizontal busbar of an electrolytic cell in a strong magnetic field environment. The device includes a complete and continuous shielding and anti-magnetic cover made of a material with good magnetic conductivity and matched with both the welding position and the welding machine. A detachable guide plate is provided at the rear end of each shielding and anti-magnetic cover; hooks connected to the welding position are provided on both sides of the shielding and anti-magnetic cover; the shielding and anti-magnetic cover is double-layered and made of electrical silicon steel or high-carbon steel plate.

[0004] The above patent document discloses a magnetic field shielding device for live welding of aluminum electrolytic cells. During the live welding of the aluminum electrolytic cells, the magnetic field shielding device wraps the welding equipment and the parts to be welded, and the welding operation is performed after the external magnetic field is shielded by the material whose surface can shield the magnetic field. However, the magnetic field shielding device needs to completely wrap the welding equipment, and the staff performing the welding operation also needs to be inside the magnetic field shielding device. Therefore, the magnetic field shielding device needs to occupy a large space and has a large weight, which affects the flexibility of the installation of the magnetic field shielding device. In addition, the shape of the magnetic field shielding device is fixed, and it is difficult to adapt to aluminum electrolytic cells of various structures and cannot form a good wrapping for the aluminum busbar, thereby affecting the magnetic field shielding effect. Therefore, the magnetic field shielding device still has room for improvement. Summary of the invention

[0005] In view of the technical defects existing in the background technology, the present invention proposes an aluminum electrolytic cell live welding device with external magnetic field shielding function, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows: An aluminum electrolytic cell live welding device with external magnetic field shielding function, comprising a fixed bracket, a welding mechanism, and a magnetic field shielding mechanism, wherein the welding mechanism is arranged on the top of the fixed bracket and extends outward, a welding gun is arranged at the end of the extended welding mechanism, and the magnetic field shielding mechanism is arranged at one end of the welding mechanism close to the welding gun; The magnetic field shielding mechanism includes the following structure: a shielding shell, the interior of the shielding shell is hollow and forms a shielding cavity, a welding entrance is provided on the side of the shielding shell away from the welding mechanism, entrance baffles are provided on the left and right sides of the welding entrance, a first moving mechanism is provided on one side of any of the entrance baffles to move the entrance baffle toward the other entrance baffle, a wrapping port connected to the welding entrance is provided on the top and bottom of the shielding shell, wrapping baffles are provided on the left and right sides of the wrapping port and on the side away from the welding entrance, and a second moving mechanism is provided on one side of the wrapping baffle to move the wrapping baffle toward the center of the wrapping port; The welding gun is arranged in the shielding cavity at a side away from the welding entrance.

[0006] As a further technical solution of the present invention, the first moving mechanism includes the following structure: two groups of first pulley groups, the two groups of first pulley groups are respectively arranged at the top and bottom of the entrance baffle, and the first pulley group is composed of at least two first pulleys; the inner wall of the shielding shell is provided with two first slide rails respectively matching the two groups of first pulley groups.

[0007] As a further technical solution of the present invention, the second moving mechanism includes the following structure: a transmission chain, the outer side of the transmission chain is fixedly connected to the wrapping baffle, the inner side of the transmission chain is provided with a matching driving sprocket, and a driving motor, and the output end of the driving motor is provided with a driving shaft movably connected to the driving sprocket.

[0008] As a further technical solution of the present invention, the wrapping baffle is composed of a plurality of combined baffles, and the plurality of combined baffles are fixedly connected to a plurality of links of a transmission chain one by one, and the transmission chain extends downward from the top of the shielding cavity along an adjacent side edge or extends upward from the bottom of the shielding cavity along an adjacent side edge.

[0009] As a further technical solution of the present invention, a steering gear is provided between the output end of the driving motor and the driving shaft, the two ends of the driving shaft extend toward the inner walls on opposite sides of the shielding shell and the extended ends are provided with driving sprockets, two transmission chains are provided on the inner side of the wrapping baffle, and a second pulley group is provided on the side of the transmission chain close to the inner wall of the shielding shell, the second pulley group is composed of a plurality of second pulleys, and the inner wall of the shielding shell is provided with a second slide rail matching the second pulley group.

[0010] As a further technical solution of the present invention, the top and bottom of the inlet baffle are both provided with a first sliding roller extending along the edge of the wrapping opening, and the wrapping baffle is provided with a second sliding roller extending along the edge of the wrapping opening at one end close to the wrapping opening.

[0011] As a further technical solution of the present invention, the welding end of the welding gun extends toward the welding entrance and a first electric push rod is provided at the other end. The movable end of the first electric push rod is fixedly connected to the welding gun and an electric rotating shaft is provided at the fixed end. The electric rotating shaft is arranged on the inner wall of the shielding shell and enables the welding gun to rotate in a vertical direction.

[0012] As a further technical solution of the present invention, the shielding shell is provided with a horizontal slide rail extending in a vertical direction on the side away from the welding entrance, a matching horizontal slider is provided on one side of the horizontal slide rail, a vertical slide rail extending along the left and right sides is provided on one side of the horizontal slider, a matching vertical slider is provided on one side of the vertical slide rail, and one side of the vertical slider is fixedly connected to the end of the welding mechanism.

[0013] As a further technical solution of the present invention, the welding mechanism is provided with a second electric push rod extending in the front-to-back direction at one end away from the welding gun, the movable end of the second electric push rod is fixedly connected to the welding mechanism, and the fixed end is provided with a third electric push rod extending in the vertical direction, the movable end of the third electric push rod is fixedly connected to the fixed end of the second electric push rod, and the fixed end is fixedly connected to the fixed bracket.

[0014] As a further technical solution of the present invention, a plurality of universal pulleys and a plurality of supporting feet are provided at the bottom of the fixed bracket, an adjusting threaded rod penetrating the top of the fixed bracket is provided at the top of the supporting feet, and a threaded hole matching the adjusting threaded rod is provided at the bottom of the fixed bracket.

[0015] The beneficial effects of the present invention are: The present invention is mainly used for live welding of aluminum busbars of aluminum electrolytic cells. The welding gun arranged inside the shielding cavity is used to weld the to-be-welded portion of the aluminum busbar. During the welding process, the to-be-welded portion is wrapped by a shielding shell to shield the external magnetic field, which is beneficial to stabilizing the arc generated during the welding process to reduce defects in the weld. In addition, the size of the wrapping opening can be adjusted by moving the wrapping baffle so that the size of the wrapping opening can be matched with aluminum busbars of different sizes, and the gap between the shielding shell and the aluminum busbar can be reduced, thereby improving the shielding effect of the shielding shell on the external magnetic field, which is beneficial to improving the quality of live welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of an aluminum electrolytic cell live welding device with external magnetic field shielding function. Figure 1 .

[0017] Figure 2 This is a schematic diagram of the structure of an aluminum electrolytic cell live welding device with external magnetic field shielding function. Figure 2 .

[0018] Figure 3 The invention is a schematic cross-sectional view of a magnetic field shielding mechanism of an aluminum electrolytic cell live welding device with an external magnetic field shielding function. Figure 1 .

[0019] Figure 4 The invention is a schematic cross-sectional view of a magnetic field shielding mechanism of an aluminum electrolytic cell live welding device with an external magnetic field shielding function. Figure 2 .

[0020] Figure 5 yes Figure 4 Partial schematic diagram at point A in the middle.

[0021] Figure 6 yes Figure 3 A partial schematic diagram of point B in the middle.

[0022] Figure 7 yes Figure 3 Partial schematic diagram of point C in the middle.

[0023] Figure 8 yes Figure 4 Partial schematic diagram at point D in the middle.

[0024] Wherein: 1-fixed bracket, 11-second electric push rod, 12-third electric push rod, 13-universal pulley, 14-support foot, 15-adjusting threaded rod, 2-welding mechanism, 21-welding gun, 22-first electric push rod, 23-electric rotating shaft, 3-magnetic field shielding mechanism, 31-shielding shell, 311-first slide rail, 312-second slide rail, 32-shielding cavity, 33-welding entrance, 34-entrance baffle, 35-wrapping port, 36-wrapping baffle, 361-combination baffle, 37-first slide roller, 38-second slide roller, 41-first pulley, 51-transmission chain, 52-drive sprocket, 53-drive motor, 54-drive shaft, 55-steering gear, 56-second pulley, 61-horizontal slide rail, 62-horizontal slider, 63-vertical slide rail, 64-vertical slider. DETAILED DESCRIPTION

[0025] The implementation modes of the present invention are described below in conjunction with relevant drawings and embodiments. The implementation modes of the present invention are 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.

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, an aluminum electrolytic cell live welding device with external magnetic field shielding function includes a fixed bracket 1, a welding mechanism 2, and a magnetic field shielding mechanism 3. The welding mechanism 2 is arranged on the top of the fixed bracket 1 and extends outward. A welding gun 21 is provided at the end of the extended welding mechanism 2. The magnetic field shielding mechanism 3 is arranged at one end of the welding mechanism 2 close to the welding gun 21; the magnetic field shielding mechanism 3 includes the following structures: a shielding shell 31, the shielding shell 31 is hollow inside and forms a shielding cavity 32, a welding inlet 33 is provided on the side of the shielding shell 31 away from the welding mechanism 2, inlet baffles 34 are provided on the left and right sides of the welding inlet 33, a first moving mechanism for moving the inlet baffle 34 toward the other inlet baffle 34 is provided on one side of any inlet baffle 34, a wrapping port 35 connected to the welding inlet 33 is provided on the top and bottom of the shielding shell 31, a wrapping baffle 36 is provided on the left and right sides of the wrapping port 35 and on the side away from the welding inlet 33, and a second moving mechanism for moving the wrapping baffle 36 toward the center of the wrapping port 35 is provided on one side of the wrapping baffle 36; the welding gun 21 is arranged in the shielding cavity 32 on the side away from the welding inlet 33.

[0027] The present invention is mainly used for live welding of aluminum busbars of aluminum electrolytic cells. In the device, a fixed bracket 1 is used to place and fix welding equipment such as an argon arc welder. A welding gun 21 is connected to the welding equipment through necessary lines. The lines connecting the welding gun 21 and the welding equipment are wrapped with materials such as metal as a protective shell to form a welding mechanism 2. In a magnetic field shielding mechanism 3, a shielding shell 31, an inlet baffle 34, and a wrapping baffle 36 are all made of materials such as stainless steel that can shield a magnetic field. The shielding shell 31 is used to wrap and shield the external magnetic field at a position where the aluminum busbar needs to be welded, so that the position where the aluminum busbar needs to be welded is located inside a shielding cavity 32. The aluminum busbar is welded by the welding equipment and the welding gun 21 located inside the shielding cavity 32. During the welding process, the shielding shell 31 shields the external magnetic field to prevent the magnetic field from affecting the normal progress of welding, which is conducive to stabilizing the arc generated during the welding process to reduce defects in the weld, thereby improving the welding quality.

[0028] After adopting the above structure, it needs to be further explained that the welding entrance 33 and the two wrapping openings 35 form a U-shaped notch on the surface of the shielding shell 31, and the aluminum busbar passes through the welding entrance 33 so that the welding part enters the shielding cavity 32 and the welding part faces the welding gun 21, and the wrapping opening 35 wraps around three sides of the aluminum busbar, and then the two entrance baffles 34 are pushed to move relative to each other by the first moving mechanism to close the welding entrance 33, and one side of the aluminum busbar is abutted against the inner wall of the entrance baffle 34, and then the wrapping baffle 36 is moved toward the aluminum busbar by the second moving mechanism until the wrapping baffle 36 abuts against the surface of the aluminum busbar, and the wrapping baffle 36 seals the aluminum busbar with the edge of the wrapping opening 35. By blocking the space between the shielding shell 31 and the aluminum busbar, the gap between the shielding shell 31 and the aluminum busbar can be reduced, so that the shielding shell 31 can be more completely wrapped around the outer surface of the welding part of the aluminum busbar. During the welding process of the welding gun 21 on the welding part, the shielding shell 31 can more completely shield the external magnetic field, which is beneficial to improving the welding effect. In addition, there are usually differences in the sizes of aluminum busbars in aluminum electrolytic cells of different structures or different models. The wrapping baffle 36 can adjust the caliber of the wrapping mouth 35 by moving toward the center of the wrapping mouth 35, so that the wrapping mouth 35 can adapt to aluminum busbars of different sizes, so that the present invention can be applied to live welding of more types of aluminum electrolytic cells.

[0029] After adopting the above structure, it needs to be further explained that, if Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the first moving mechanism includes the following structure: two sets of first pulley groups, the two sets of first pulley groups are respectively arranged at the top and bottom of the entrance baffle 34, and the first pulley group is composed of at least two first pulleys 41; the inner wall of the shielding shell 31 is provided with two first slide rails 311 respectively matching the two sets of first pulley groups.

[0030] The first pulley 41 can move along the first slide rail 311, or the first pulley 41 can be driven by a motor to rotate and move along the first slide rail 311, so that the two entrance baffles 34 can move relative to each other or move away from each other, so that the welding entrance 33 is closed or opened. When the welding entrance 33 is opened, the welding part of the aluminum busbar can enter the shielding cavity 32 or leave the shielding cavity 32 through the welding entrance 33. When the welding entrance 33 is closed, the entrance baffle 34 can prevent the external magnetic field from entering the shielding cavity 32 from the back of the welding part. Since the shielding shell 31 needs to be suitable for aluminum busbars of different sizes, the gap between the smaller aluminum busbar and the edge of the welding entrance 33 is usually larger. The entrance baffle 34 can avoid the influence of the external magnetic field on the live welding process in this case, which is beneficial to improving the welding quality.

[0031] After adopting the above structure, it needs to be further explained that, if Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 As shown, the second moving mechanism includes the following structure: a transmission chain 51, the outer side of the transmission chain 51 is fixedly connected to the wrapping baffle 36, the inner side of the transmission chain 51 is provided with a matching driving sprocket 52, a driving motor 53, and the output end of the driving motor 53 is provided with a driving shaft 54 ​​movably connected to the driving sprocket 52; the wrapping baffle 36 is composed of a plurality of combined baffles 361, and the plurality of combined baffles 361 are fixedly connected to a plurality of chain links of the transmission chain 51 one by one, and the transmission chain 51 extends downward from the top of the shielding cavity 32 along an adjacent side edge or extends upward from the bottom of the shielding cavity 32 along an adjacent side edge.

[0032] The driving motor 53 rotates the driving sprocket 52 through the driving shaft 54. The driving sprocket 52 engages with the transmission chain 51 to make the transmission chain 51 move toward the wrapping opening 35 or in the opposite direction, and drives the wrapping baffle 36 to move synchronously, so that the wrapping baffle 36 extends out from the edge of the wrapping opening 35 or is received in the shielding cavity 32. Since the wrapping baffle 36 is composed of a plurality of combined baffles 361 connected end to end in sequence, based on this structure, the wrapping baffle 36 can be bent along the extension direction of the driving chain 51. When the wrapping baffle 36 is received in the shielding cavity 32, the wrapping baffle 36 can extend downward from the top of the shielding cavity 32 along an adjacent side edge or extend upward from the bottom of the shielding cavity 32 along an adjacent side edge, thereby reducing the space occupied by the shielding shell 31 in the horizontal direction, so that the shielding shell 31 can wrap the aluminum busbar in a relatively narrow space.

[0033] After adopting the above structure, it needs to be further explained that, if Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8 As shown, a deflector 55 is provided between the output end of the driving motor 53 and the driving shaft 54, and both ends of the driving shaft 54 ​​extend toward the inner walls on opposite sides of the shielding shell 31 and the extended ends are provided with driving sprockets 52, and two transmission chains 51 are provided on the inner side of the wrapping baffle 36, and a second pulley group is provided on the side of the transmission chain 51 close to the inner wall of the shielding shell 31, and the second pulley group is composed of a plurality of second pulleys 56, and a second slide rail 312 matching the second pulley group is provided on the inner wall of the shielding shell 31.

[0034] The steering gear 55 internally uses a worm wheel and a worm gear or mutually meshing bevel gears as a transmission structure between the drive motor 53 and the drive shaft 54, so that the drive motor 53 can drive the drive shaft 54 ​​perpendicular to the output end of the drive motor 53 to rotate, thereby driving the two drive sprockets 52 to rotate. When the rotating drive sprocket 52 moves the transmission chain 51 through engagement, the second pulley 56 on one side of the transmission chain 51 will move along the second slide rail 312. The second slide rail 312 can provide support for the transmission chain 51 to prevent the wrapping baffle 36 from bending downward due to the loss of support of the transmission chain 51 when it extends out of the wrapping opening 35. The second slide rail 312 can also limit the movement path of the transmission chain 51, so that the wrapping baffle 36 can extend out of the wrapping opening 35 along a fixed path and be received in the shielding cavity 32, thereby improving the stability of the shielding shell 31 during the process of wrapping the aluminum busbar.

[0035] As one of the preferred embodiments of the present invention, Figure 1 , Figure 2 , Figure 3 As shown, the welding end of the welding gun 21 extends toward the welding entrance 33, and the other end is provided with a first electric push rod 22. The movable end of the first electric push rod 22 is fixedly connected to the welding gun 21, and the fixed end is provided with an electric shaft 23. The electric shaft 23 is arranged on the inner wall of the shielding shell 31 and enables the welding gun 21 to rotate in a vertical direction. Since the shielding shell 31 can wrap aluminum busbars of different sizes, the distance between the surface of the aluminum busbar and the inner wall of the shielding shell 31 is not fixed. The welding gun 21 can be pushed or pulled by the first electric push rod 22 to adjust the distance between the welding gun 21 and the surface of the aluminum busbar. After forming a suitable welding distance, the welding gun 21 is used to weld the parts of the aluminum busbar surface that need to be welded. In addition, when the electric shaft 23 is working, the welding gun 21 can be swung to adjust the angle between the welding gun 21 and the surface of the aluminum busbar, thereby forming a suitable welding angle, which is beneficial to improving the welding quality.

[0036] As one of the preferred embodiments of the present invention, Figure 1 , Figure 2As shown, a horizontal slide rail 61 extending in the vertical direction is provided on one side of the shielding shell 31 away from the welding entrance 33, a matching horizontal slider 62 is provided on one side of the horizontal slide rail 61, a vertical slide rail 71 extending along the left and right sides is provided on one side of the horizontal slider 62, a matching vertical slider 72 is provided on one side of the vertical slide rail 71, and one side of the vertical slider 72 is fixedly connected to the end of the welding mechanism 2; the horizontal slide rail 61 and the vertical slide rail 71 are preferably electric linear guides, and the horizontal slider 62 moves along the horizontal slide rail 61 to enable the shielding shell 31 to move in the horizontal direction, and the welding gun 21 is connected to the aluminum busbar During the welding process, the shielding shell 31 moves in the vertical direction to form a horizontally extending weld. During the horizontal welding process, the wrapping baffles 36 on the left and right sides of the aluminum busbar are driven to move in the same direction by the driving motor 53. The wrapping baffles 36 can always block the space between the aluminum busbar and the wrapping opening 35, so that the shielding shell 31 can completely wrap the welding part, ensuring that the shielding shell 31 can stably shield the external magnetic field. Similarly, the vertical slider 72 moves along the vertical slide rail 71 to allow the welding gun 21 to form a vertically extending weld on the surface of the aluminum busbar.

[0037] After adopting the above structure, it needs to be further explained that, if Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the top and bottom of the entrance baffle 34 are provided with a first sliding roller 37 extending along the edge of the wrapping opening 35, and the end of the wrapping baffle 36 close to the wrapping opening 35 is provided with a second sliding roller 38 extending along the edge of the wrapping opening 35; when the shielding shell 31 moves in the vertical direction, the first sliding roller 37 and the second sliding roller 38 can roll along the surface of the aluminum busbar, reducing the friction between the aluminum busbar and the wrapping baffle 36 and the entrance baffle 34, so that the shielding shell 31 can move more easily in the vertical direction.

[0038] As one of the preferred embodiments of the present invention, Figure 1 , Figure 2 As shown, a second electric push rod 11 extending in the front-to-back direction is provided at one end of the welding mechanism 2 away from the welding gun 21, a movable end of the second electric push rod 11 is fixedly connected to the welding mechanism 2, and a third electric push rod 12 extending in the vertical direction is provided at the fixed end, and the movable end of the third electric push rod 12 is fixedly connected to the fixed end of the second electric push rod 11, and the fixed end is fixedly connected to the fixed bracket 1; the second electric push rod 11 adjusts the length of the welding mechanism 2 extending outward from the top of the fixed bracket 1, so that the shielding shell 31 can extend from the position where the live welding device is placed to the outside of the aluminum busbar to wrap it, and the third electric push rod 12 can adjust the height of the welding mechanism 2 and the magnetic field shielding mechanism 3, so that the height of the shielding shell 31 can match the height of the part of the aluminum busbar that needs to be welded, and the aluminum busbar can be quickly wrapped by the shielding shell 31 and then the welding operation can be started, which is beneficial to improving the welding efficiency.

[0039] As one of the preferred embodiments of the present invention, Figure 1 , Figure 2 As shown, a plurality of universal pulleys 13 and a plurality of supporting feet 14 are provided at the bottom of the fixed bracket 1, an adjusting threaded rod 15 which passes through the top of the fixed bracket 1 is provided at the top of the supporting foot 14, and a threaded hole matching the adjusting threaded rod 15 is provided at the bottom of the fixed bracket 1; the universal pulley 13 enables the live welding equipment to adjust its position by pushing, thereby improving flexibility; after the live welding equipment is moved to the set position, the height of the supporting foot 14 is adjusted by screwing the adjusting threaded rod 15, so that the live welding device is supported by adjusting the supporting foot 14, thereby preventing the live welding equipment from sliding under the action of the universal pulley 13 during welding, thereby improving the stability of the welding process.

[0040] To sum up, the present invention is mainly used for live welding of aluminum busbars of aluminum electrolytic cells. The welding gun 21 arranged inside the shielding cavity 32 is used to weld the to-be-welded portion of the aluminum busbar. During the welding process, the to-be-welded portion is wrapped by the shielding shell 31 to shield the external magnetic field, which is beneficial to stabilizing the arc generated during the welding process to reduce defects in the weld. In addition, the size of the wrapping opening 35 can be adjusted by moving the wrapping baffle 36 so that the size of the wrapping opening 35 can match aluminum busbars of different sizes, and the gap between the shielding shell 31 and the aluminum busbar can be reduced, thereby improving the shielding effect of the shielding shell 31 on the external magnetic field, which is beneficial to improving the quality of live welding.

[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 an aluminum electrolytic cell with an external magnetic field shielding function, comprising a fixing bracket (1), a welding mechanism (2), and a magnetic field shielding mechanism (3), characterized in that: The welding mechanism (2) is arranged on the top of the fixed bracket (1) and extends outwards, a welding gun (21) is arranged at the end of the extended welding mechanism (2), and the magnetic field shielding mechanism (3) is arranged at one end of the welding mechanism (2) close to the welding gun (21); The magnetic field shielding mechanism (3) comprises the following structure: a shielding shell (31), the shielding shell (31) is hollow inside and forms a shielding cavity (32), a welding entrance (33) is provided on the side of the shielding shell (31) away from the welding mechanism (2), entrance baffles (34) are provided on the left and right sides of the welding entrance (33), a first moving mechanism is provided on one side of any of the entrance baffles (34) for moving the entrance baffle (34) toward the other entrance baffle (34), a wrapping opening (35) in communication with the welding entrance (33) is provided on the top and bottom of the shielding shell (31), wrapping baffles (36) are provided on the left and right sides of the wrapping opening (35) and on the side away from the welding entrance (33), and a second moving mechanism is provided on one side of the wrapping baffle (36) for moving the wrapping baffle (36) toward the center of the wrapping opening (35); The welding gun (21) is arranged in the shielding cavity (32) at a side away from the welding inlet (33).

2. The live welding device for aluminum electrolytic cell with external magnetic field shielding function according to claim 1 is characterized in that: The first moving mechanism comprises the following structure: two sets of first pulley groups, the two sets of first pulley groups are respectively arranged at the top and bottom of the entrance baffle (34), the first pulley groups are composed of at least two first pulleys (41); the inner wall of the shielding shell (31) is provided with two first slide rails 311 respectively matching the two sets of first pulley groups.

3. The live welding device for aluminum electrolytic cell with external magnetic field shielding function according to claim 1 is characterized in that: The second moving mechanism comprises the following structures: a transmission chain (51), the outer side of the transmission chain (51) being fixedly connected to the wrapping baffle (36), the inner side of the transmission chain (51) being provided with a matching driving sprocket (52), and a driving motor (53), the output end of the driving motor (53) being provided with a driving shaft (54) movably connected to the driving sprocket (52).

4. The live welding device for aluminum electrolytic cell with external magnetic field shielding function according to claim 3 is characterized in that: The wrapping baffle (36) is composed of a plurality of combined baffles (361), and the plurality of combined baffles (361) are fixedly connected to a plurality of chain links of a transmission chain (51) one by one, and the transmission chain (51) extends downward from the top of the shielding cavity (32) along an adjacent side edge or extends upward from the bottom of the shielding cavity (32) along an adjacent side edge.

5. The live welding device for aluminum electrolytic cell with external magnetic field shielding function according to claim 3 is characterized in that: A deflector (55) is provided between the output end of the drive motor (53) and the drive shaft (54); both ends of the drive shaft (54) extend toward the inner walls of opposite sides of the shielding shell (31), and the extended ends are provided with drive sprockets (52); two transmission chains (51) are provided on the inner side of the wrapping baffle (36); a second pulley block is provided on the side of the transmission chain (51) close to the inner wall of the shielding shell (31); the second pulley block is composed of a plurality of second pulleys (56); and a second slide rail (312) matching the second pulley block is provided on the inner wall of the shielding shell (31).

6. The live welding device for aluminum electrolytic cell with external magnetic field shielding function according to claim 1, characterized in that: The top and bottom of the inlet baffle (34) are both provided with a first sliding roller (37) extending along the edge of the wrapping opening (35), and the end of the wrapping baffle (36) close to the wrapping opening (35) is provided with a second sliding roller (38) extending along the edge of the wrapping opening (35).

7. The live welding device for aluminum electrolytic cell with external magnetic field shielding function according to claim 1, characterized in that: The welding end of the welding gun (21) extends toward the welding inlet (33), and the other end is provided with a first electric push rod (22); the movable end of the first electric push rod (22) is fixedly connected to the welding gun (21), and the fixed end is provided with an electric rotating shaft (23); the electric rotating shaft (23) is arranged on the inner wall of the shielding shell (31) and enables the welding gun (21) to rotate in a vertical direction.

8. The live welding device for aluminum electrolytic cell with external magnetic field shielding function according to claim 1, characterized in that: A horizontal slide rail (61) extending in a vertical direction is provided on one side of the shielding shell (31) away from the welding entrance (33); a matching horizontal slide block (62) is provided on one side of the horizontal slide rail (61); a vertical slide rail (71) extending along left and right sides is provided on one side of the horizontal slide block (62); a matching vertical slide block (72) is provided on one side of the vertical slide rail (71); and one side of the vertical slide block (72) is fixedly connected to an end of the welding mechanism (2).

9. The live welding device for aluminum electrolytic cell with external magnetic field shielding function according to claim 1, characterized in that: A second electric push rod (11) extending in the front-to-back direction is provided at one end of the welding mechanism (2) away from the welding gun (21); a movable end of the second electric push rod (11) is fixedly connected to the welding mechanism (2); a third electric push rod (12) extending in the vertical direction is provided at the fixed end; a movable end of the third electric push rod (12) is fixedly connected to the fixed end of the second electric push rod (11); and the fixed end is fixedly connected to the fixed bracket (1).

10. The live welding device for aluminum electrolytic cell with external magnetic field shielding function according to claim 1, characterized in that: The bottom of the fixed bracket (1) is provided with a plurality of universal pulleys (13) and a plurality of support feet (14); the top of the support feet (14) is provided with an adjustment threaded rod (15) penetrating the top of the fixed bracket (1); and the bottom of the fixed bracket (1) is provided with a threaded hole matching the adjustment threaded rod (15).

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