Aluminum electrolysis cell with external magnetic field shielding function

Abstract

The application discloses a kind of aluminium electrolysis cell live welding device with external magnetic field shielding function, belong to aluminium electrolysis cell live welding technical field, including fixed support, welding mechanism, magnetic field shielding mechanism, welding mechanism is located at the top of fixed support and extends outward, and welding mechanism end is equipped with welding gun, and magnetic field shielding mechanism is equipped at the end of welding mechanism;Magnetic field shielding mechanism includes the following structure, shielding shell, shielding shell is hollow inside and forms shielding cavity, shielding shell one side is equipped with welding entrance, and both sides of welding entrance are equipped with entrance baffle, and entrance baffle one side is equipped with first moving mechanism, and shielding shell top and bottom are equipped with wrapping mouth and wrapping baffle, and wrapping baffle one side is equipped with second moving mechanism, so that wrapping baffle moves towards the center of wrapping mouth;Welding gun is located in shielding cavity and away from welding entrance one side;The application improves the quality of aluminium electrolysis cell live welding by shielding external magnetic field.

Description

Technical Field

[0001] This invention relates to the field of live welding technology for aluminum electrolytic cells, and more specifically to a live welding device for aluminum electrolytic cells with external magnetic field shielding function. Background Technology

[0002] During the long-term operation of aluminum electrolytic cells, aluminum busbars may be damaged due to corrosion, wear, breakage, and other factors. Currently, welding is commonly used to repair aluminum busbars, ensuring a tight and secure connection between them, thereby reducing contact resistance and improving conductivity to ensure the normal operation of the electrolytic cell. However, because aluminum electrolytic cells generate strong magnetic fields during operation, welding may not be possible. Traditionally, the aluminum busbars were repaired by welding after a power outage. However, restarting an aluminum electrolytic cell after a power outage consumes a large amount of electrical energy, resulting in energy waste and reduced production capacity. Currently, welding repair of aluminum busbars after a power outage has been gradually abandoned, replaced by live welding. A common method of live welding in aluminum electrolytic cells is to perform welding after shielding the magnetic field. This is usually done by using a magnetic field shielding material to make a magnetic field shielding cover, which is then wrapped around the welding area before welding. However, different aluminum electrolytic cells have significant structural differences, making it difficult to match different aluminum electrolytic cell structures and form a good shielding around the welding area. This results in the welding process still being affected by the magnetic field, reducing the welding quality.

[0003] Based on the above, Chinese Patent No. CN104827172A discloses an anti-magnetic shielding device for repairing and welding horizontal busbars of electrolytic cells in a strong magnetic field environment. The device includes a complete and continuous anti-magnetic shielding cover made of a material with good magnetic permeability that fits both the welding site and the welding machine. A detachable guide plate is fitted at the rear end of each anti-magnetic shielding cover. Hooks for connecting to the welding site are provided on both sides of the anti-magnetic shielding cover. The anti-magnetic shielding cover is double-layered and its material is electrical silicon steel or high carbon steel plate.

[0004] The aforementioned patent document discloses a magnetic field shielding device for live welding in aluminum electrolytic cells. During live welding of aluminum electrolytic cells, the magnetic field shielding device encloses both the welding equipment and the part to be welded. The external magnetic field is shielded by a material whose surface can shield the magnetic field before the welding operation is carried out. However, the magnetic field shielding device needs to completely enclose the welding equipment, and the personnel performing the welding operation also need to be inside the magnetic field shielding device. Therefore, the magnetic field shielding device requires a large space and is heavy, which affects the flexibility of the installation of the magnetic field shielding device. Furthermore, the shape of the magnetic field shielding device is fixed, making it difficult to adapt to aluminum electrolytic cells with various structures and failing to form a good enclosure for the aluminum busbar, thus affecting the magnetic field shielding effect. Therefore, there is still room for improvement in this magnetic field shielding device. Summary of the Invention

[0005] To address the technical deficiencies in the background technology, this invention proposes an aluminum electrolytic cell electric welding device with external magnetic field shielding function, which solves the above-mentioned technical problems and meets practical needs. The specific technical solution is as follows:

[0006] An electric welding device for an aluminum electrolytic cell with external magnetic field shielding function includes a fixed support, a welding mechanism, and a magnetic field shielding mechanism. The welding mechanism is located on the top of the fixed support and extends outward. A welding gun is provided at the end of the extended welding mechanism. The magnetic field shielding mechanism is located at the end of the welding mechanism near the welding gun.

[0007] The magnetic field shielding mechanism includes the following structure: a shielding shell, the shielding shell being hollow and forming a shielding cavity; a welding inlet on the side of the shielding shell away from the welding mechanism; inlet baffles on both the left and right sides of the welding inlet; a first moving mechanism on one side of any inlet baffle that moves the inlet baffle toward the other inlet baffle; a wrapping opening communicating with the welding inlet on the top and bottom of the shielding shell; wrapping baffles on both the left and right sides of the wrapping opening and on the side away from the welding inlet; and a second moving mechanism on one side of the wrapping baffle that moves the wrapping baffle toward the center of the wrapping opening.

[0008] The welding gun is located inside the shielding cavity on the side away from the welding entrance.

[0009] As a further technical solution of the present invention, the first moving mechanism includes the following structure: two sets of first pulley groups, the two sets of first pulley groups are respectively disposed 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 that are respectively matched with the two sets of first pulley groups.

[0010] As a further technical solution of the present invention, the second moving mechanism includes the following structure: a transmission chain, the outer side of which is fixedly connected to the wrapping baffle, a matching drive sprocket on the inner side of which is provided, a drive motor, and a drive shaft rod movably connected to the drive sprocket at the output end of the drive motor.

[0011] As a further technical solution of the present invention, the packaging baffle is composed of several combined baffles, and the several combined baffles are fixedly connected to several links of the transmission chain one by one. The transmission chain extends downward from the top of the shielding cavity along an adjacent side or extends upward from the bottom of the shielding cavity along an adjacent side.

[0012] As a further technical solution of the present invention, a steering gear is provided between the output end of the drive motor and the drive shaft. Both ends of the drive shaft extend toward the inner walls of opposite sides of the shielding shell, and drive sprockets are provided at the ends of the extensions. Two transmission chains are provided on the inner side of the wrapping baffle. A second pulley group is provided on the side of the transmission chain near the inner wall of the shielding shell. The second pulley group is composed of several second pulleys. A second slide rail matching the second pulley group is provided on the inner wall of the shielding shell.

[0013] As a further technical solution of the present invention, the top and bottom of the inlet baffle are provided with a first sliding roller extending along the edge of the wrapping opening, and the end of the wrapping baffle near the wrapping opening is provided with a second sliding roller extending along the edge of the wrapping opening.

[0014] As a further technical solution of the present invention, the welding end of the welding gun extends toward the welding entrance, and the other end is provided with a first electric push rod. The movable end of the first electric push rod is fixedly connected to the welding gun, and the fixed end is provided with an electric rotating shaft. The electric rotating shaft is located on the inner wall of the shielding shell and makes the welding gun rotate in the vertical direction.

[0015] 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 in both 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.

[0016] As a further technical solution of the present invention, the welding mechanism is provided with a second electric push rod extending in the front-back direction at the 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.

[0017] As a further technical solution of the present invention, the bottom of the fixed bracket is provided with a number of universal pulleys and a number of support feet, the top of the support feet is provided with an adjusting threaded rod that penetrates the top of the fixed bracket, and the bottom of the fixed bracket is provided with a threaded hole that matches the adjusting threaded rod.

[0018] The beneficial effects of this invention are as follows:

[0019] This invention is mainly used for live welding of aluminum busbars in aluminum electrolysis cells. A welding gun located inside a shielding cavity is used to weld the parts of the aluminum busbar to be welded. During the welding process, the shielding shell encloses the parts to be welded to shield against external magnetic fields, which helps stabilize the electric arc generated during welding and reduces defects in the weld. Furthermore, the size of the enclosing opening can be adjusted by moving the enclosing baffle, allowing the opening size to match aluminum busbars of different sizes. This reduces the gap between the shielding shell and the aluminum busbar, thereby improving the shielding effect of the shielding shell against external magnetic fields and improving the quality of live welding. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of an aluminum electrolytic cell live welding device with external magnetic field shielding function. Figure 1 .

[0021] Figure 2 A schematic diagram of the structure of an aluminum electrolytic cell live welding device with external magnetic field shielding function. Figure 2 .

[0022] Figure 3 A cross-sectional view of the magnetic field shielding mechanism of an aluminum electrolytic cell live welding device with external magnetic field shielding function. Figure 1 .

[0023] Figure 4 A cross-sectional view of the magnetic field shielding mechanism of an aluminum electrolytic cell live welding device with external magnetic field shielding function. Figure 2 .

[0024] Figure 5 yes Figure 4 A partial schematic diagram of point A in the middle.

[0025] Figure 6 yes Figure 3 A partial schematic diagram at point B in the middle.

[0026] Figure 7 yes Figure 3 A partial schematic diagram at point C.

[0027] Figure 8 yes Figure 4 A partial schematic diagram at point D in the middle.

[0028] The components are: 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 opening, 36-wrapping baffle, 361-combination baffle, 37-first sliding roller, 38-second sliding roller, 41-first pulley, 51-transmission chain, 52-drive sprocket, 53-drive motor, 54-drive shaft, 55-steering device, 56-second pulley, 61-horizontal slide rail, 62-horizontal slider, 63-vertical slide rail, 64-vertical slider. Detailed Implementation

[0029] The embodiments of the present invention will be described below with reference to the accompanying drawings and examples. The embodiments of the present invention are not limited to the following examples, and the present invention relates to the 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.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, an aluminum electrolytic cell welding device with external magnetic field shielding function includes a fixed support 1, a welding mechanism 2, and a magnetic field shielding mechanism 3. The welding mechanism 2 is located on the top of the fixed support 1 and extends outward. A welding gun 21 is provided at the end of the welding mechanism 2. The magnetic field shielding mechanism 3 is located at the end of the welding mechanism 2 near the welding gun 21. The magnetic field shielding mechanism 3 includes the following structure: a shielding shell 31, which 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 both the left and right sides of the welding inlet 33. A first moving mechanism is provided on one side of any inlet baffle 34 to move the inlet baffle 34 toward the other inlet baffle 34. The top and bottom of the shielding shell 31 are provided with a wrapping opening 35 communicating with the welding inlet 33. Wrapping baffles 36 are provided on both the left and right sides of the wrapping opening 35 and on the side away from the welding inlet 33. A second moving mechanism is provided on one side of the wrapping baffle 36 to move the wrapping baffle 36 toward the center of the wrapping opening 35. The welding gun 21 is located in the shielding cavity 32 on the side away from the welding inlet 33.

[0031] This invention is mainly used for live welding of aluminum busbars in aluminum electrolysis cells. In this device, the fixed bracket 1 is used to place and fix welding equipment such as an argon arc welding machine. The welding gun 21 is connected to the welding equipment through necessary wiring. The wiring connecting the welding gun 21 and the welding equipment is wrapped with a material such as metal as a protective shell to form the welding mechanism 2. In the magnetic field shielding mechanism 3, the shielding shell 31, the inlet baffle 34, and the wrapping baffle 36 are all made of materials such as stainless steel that can shield magnetic fields. The shielding shell 31 wraps the position of the aluminum busbar to be welded and shields the external magnetic field, so that the position of the aluminum busbar to be welded is located inside the shielding cavity 32. The welding equipment and the welding gun 21 located inside the shielding cavity 32 weld the aluminum busbar. During the welding process, the shielding shell 31 shields the external magnetic field to prevent the magnetic field from affecting the normal progress of the welding, which helps to stabilize the electric arc generated during the welding process, reduce defects in the weld, and thus improve the welding quality.

[0032] With the above structure, it should be further explained that the welding inlet 33 and the two wrapping openings 35 form a U-shaped notch on the surface of the shielding shell 31. The aluminum busbar enters the shielding cavity 32 through the welding inlet 33, with the welding part facing the welding gun 21. The wrapping openings 35 wrap around three sides of the aluminum busbar. Then, the first moving mechanism pushes the two inlet baffles 34 to move relative to each other, closing the welding inlet 33 and causing one side of the aluminum busbar to abut against the inner wall of the inlet baffle 34. Subsequently, the second moving mechanism moves the wrapping baffle 36 toward the aluminum busbar until the wrapping baffle 36 abuts against the surface of the aluminum busbar. The wrapping baffle 36 closes the edge of the wrapping opening 35 to the aluminum busbar. By shielding the space between them, the gap between the shielding shell 31 and the aluminum busbar can be reduced, allowing the shielding shell 31 to more completely wrap around the outer surface of the welding part of the aluminum busbar. During the welding process of the welding gun 21, the shielding shell 31 can more completely shield the external magnetic field, which is beneficial to improving the welding effect. In addition, the size of the aluminum busbar in different structures or models of aluminum electrolytic cells usually varies. The wrapping baffle 36 can adjust the diameter of the wrapping opening 35 by moving towards the center of the wrapping opening 35, so that the wrapping opening 35 can accommodate aluminum busbars of different sizes. This makes the present invention applicable to live welding of more types of aluminum electrolytic cells.

[0033] After adopting the above structure, it is necessary to further explain that, as 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, which are respectively located at the top and bottom of the entrance baffle 34. Each first pulley group consists of at least two first pulleys 41. The inner wall of the shielding shell 31 is provided with two first slide rails 311 that are respectively matched with the two sets of first pulley groups.

[0034] The first pulley 41 can move along the first slide rail 311, or it can be driven by a motor to rotate and move along the first slide rail 311, thereby causing the two inlet baffles 34 to move relative to each other or away from each other, so that the welding inlet 33 is closed or opened. When the welding inlet 33 is open, the welding part of the aluminum busbar can enter or leave the shielding cavity 32 through the welding inlet 33. When the welding inlet 33 is closed, the inlet baffles 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 inlet 33 is usually larger. The inlet baffles 34 can prevent the influence of the external magnetic field on the live welding process in this case, which is beneficial to improving the welding quality.

[0035] After adopting the above structure, it is necessary to further explain that, as 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 which is fixedly connected to the wrapping baffle 36, a matching drive sprocket 52 on the inner side of the transmission chain 51, a drive motor 53, and a drive shaft 54 ​​movably connected to the drive sprocket 52 at the output end of the drive motor 53; the wrapping baffle 36 is composed of several combined baffles 361, which are fixedly connected to several links of the transmission chain 51 one by one; the transmission chain 51 extends downward from the top of the shielding cavity 32 along an adjacent side or upward from the bottom of the shielding cavity 32 along an adjacent side.

[0036] The drive motor 53 drives the drive sprocket 52 to rotate via the drive shaft 54. The drive sprocket 52 engages with the transmission chain 51, causing the transmission chain 51 to move toward or in the opposite direction of the wrapping opening 35, and driving the wrapping baffle 36 to move synchronously. This allows the wrapping baffle 36 to extend from the edge of the wrapping opening 35 or be retracted into the shielding cavity 32. Since the wrapping baffle 36 is composed of several 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 transmission chain 51. When the wrapping baffle 36 is retracted into the shielding cavity 32, the wrapping baffle 36 can extend downward from the top of the shielding cavity 32 along an adjacent side or upward from the bottom of the shielding cavity 32 along an adjacent side, 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.

[0037] After adopting the above structure, it is necessary to further explain that, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8 As shown, a steering gear 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 the shielding shell 31 on opposite sides, and each end of the extension is provided with a drive sprocket 52. Two transmission chains 51 are provided inside the baffle 36. A second pulley group is provided on the side of the transmission chain 51 near the inner wall of the shielding shell 31. The second pulley group is composed of several second pulleys 56. A second slide rail 312 matching the second pulley group is provided on the inner wall of the shielding shell 31.

[0038] The steering gear 55 internally uses a worm gear and worm shaft or a meshing helical gear as the transmission structure between the drive motor 53 and the drive shaft 54. This allows the drive motor 53 to drive the drive shaft 54, which is perpendicular to the output end of the drive motor 53, to rotate. This, in turn, drives the two drive sprockets 52 to rotate. As the rotating drive sprockets 52 mesh, the transmission chain 51 moves. During this process, the second pulley 56 on one side of the transmission chain 51 moves along the second slide rail 312. The second slide rail 312 provides support for the transmission chain 51, preventing it from bending downwards due to loss of support when the wrapping baffle 36 extends out of the wrapping opening 35. The second slide rail 312 also restricts the movement path of the transmission chain 51, allowing the wrapping baffle 36 to extend out of the wrapping opening 35 along a fixed path and to be stored in the shielding cavity 32, thus improving the stability of the shielding shell 31 during the wrapping of the aluminum busbar.

[0039] As one of the preferred embodiments of the present invention, such as Figure 1 , Figure 2 , Figure 3 As shown, 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 located on the inner wall of the shielding shell 31 and makes the welding gun 21 rotate in the 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 rotating shaft 23 is working, it can make the welding gun 21 swing 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.

[0040] As one of the preferred embodiments of the present invention, such as Figure 1 , Figure 2As shown, the shielding shell 31 has a horizontal slide rail 61 extending vertically on the side away from the welding entrance 33. A matching horizontal slider 62 is provided on one side of the horizontal slide rail 61, and a vertical slide rail 71 extending to 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. Both the horizontal slide rail 61 and the vertical slide rail 71 are preferably electric linear guides. The horizontal slider 62 moves along the horizontal slide rail 61, allowing the shielding shell 31 to move horizontally. The welding gun 21 is used to weld the aluminum busbar. During the welding process, the shielding shell 31 moves vertically to form a horizontally extending weld. During the horizontal welding process, the drive motor 53 simultaneously drives the wrapping baffles 36 on both sides of the aluminum busbar to move in the same direction. This ensures that the wrapping baffles 36 always block the space between the aluminum busbar and the wrapping opening 35, allowing the shielding shell 31 to completely wrap the welding area and ensure 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 make the welding gun 21 form a vertically extending weld on the surface of the aluminum busbar.

[0041] After adopting the above structure, it is necessary to further explain that, as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the top and bottom of the inlet baffle 34 are provided with first sliding rollers 37 extending along the edge of the wrapping opening 35, and the wrapping baffle 36 is provided with a second sliding roller 38 extending along the edge of the wrapping opening 35 at one end near the wrapping opening 35. When the shielding shell 31 moves in the vertical direction, the first sliding rollers 37 and the second sliding rollers 38 can roll along the surface of the aluminum busbar, reducing the friction between the aluminum busbar and the wrapping baffle 36 and the inlet baffle 34, so that the shielding shell 31 can move more easily in the vertical direction.

[0042] As one of the preferred embodiments of the present invention, such as Figure 1 , Figure 2 As shown, the welding mechanism 2 has a second electric push rod 11 extending in the front-rear direction at the end away from the welding gun 21. The movable end of the second electric push rod 11 is fixedly connected to the welding mechanism 2, and the fixed end has a third electric push rod 12 extending in the vertical direction. 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 wrap around the aluminum busbar. 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. The aluminum busbar can be quickly wrapped by the shielding shell 31 before the welding operation can begin, which is beneficial to improving welding efficiency.

[0043] As one of the preferred embodiments of the present invention, such as Figure 1 , Figure 2 As shown, the bottom of the fixed bracket 1 is provided with several universal pulleys 13 and several support feet 14. The top of the support feet 14 is provided with an adjusting threaded rod 15 that passes through the top of the fixed bracket 1. The bottom of the fixed bracket 1 is provided with a threaded hole that matches the adjusting threaded rod 15. The universal pulleys 13 allow the live welding equipment to be adjusted in position by pushing, improving flexibility. After the live welding equipment is moved to the set position, the height of the support feet 14 can be adjusted by turning the adjusting threaded rod 15, so that the live welding equipment is supported by the adjusting support feet 14, avoiding the live welding equipment from sliding under the action of the universal pulleys 13 during the welding process, and improving the stability of the welding process.

[0044] In summary, this invention is mainly used for live welding of aluminum busbars in aluminum electrolysis cells. The welding gun 21 located inside the shielding cavity 32 is used to weld the part of the aluminum busbar to be welded. During the welding process, the part to be welded is wrapped by the shielding shell 31 to shield the external magnetic field, which helps to stabilize the electric arc generated during the welding process and 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 be matched with aluminum busbars of different sizes. This can reduce the gap between the shielding shell 31 and the aluminum busbar, thereby improving the shielding effect of the shielding shell 31 on the external magnetic field and improving the quality of live welding.

[0045] 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 an aluminum electrolytic cell with external magnetic field shielding function, comprising a fixed bracket (1), a welding mechanism (2), and a magnetic field shielding mechanism (3), characterized in that, The welding mechanism (2) is located on the top of the fixed bracket (1) and extends outward. The welding gun (21) is provided at the end of the extension of the welding mechanism (2). The magnetic field shielding mechanism (3) is located at the end of the welding mechanism (2) near the welding gun (21). The magnetic field shielding mechanism (3) includes: a shielding shell (31), the shielding shell (31) is hollow inside and forms a shielding cavity (32), the shielding shell (31) is provided with a welding inlet (33) on the side away from the welding mechanism (2), the welding inlet (33) is provided with an inlet baffle (34) on both the left and right sides, and a first moving mechanism is provided on one side of any of the inlet baffles (34) to move the inlet baffle (34) toward the other inlet baffle (34), the shielding shell (31) is provided with a wrapping opening (35) at the top and bottom that communicates with the welding inlet (33), the wrapping opening (35) is provided with a wrapping baffle (36) on both the left and right sides and the side away from the welding inlet (33), and a second moving mechanism is provided on one side of the wrapping baffle (36) to move the wrapping baffle (36) toward the center of the wrapping opening (35); The welding gun (21) is located inside the shielding cavity (32) on the side away from the welding entrance (33); The first moving mechanism includes: two sets of first pulley groups, which are respectively located at the top and bottom of the entrance baffle (34), and each first pulley group consists of at least two first pulleys (41); the inner wall of the shielding shell (31) is provided with two first slide rails (311) that are respectively matched with the two sets of first pulley groups. The second moving mechanism includes: a transmission chain (51), the outer side of which is fixedly connected to the wrapping baffle (36), the inner side of which is provided with a matching drive sprocket (52), and a drive motor (53), the output end of which is provided with a drive shaft (54) movably connected to the drive sprocket (52). The wrapping baffle (36) is composed of several combined baffles (361), and several combined baffles (361) are fixedly connected to several links of the transmission chain (51) one by one. The transmission chain (51) extends downward from the top of the shielding cavity (32) along an adjacent side or extends upward from the bottom of the shielding cavity (32) along an adjacent side. A steering gear (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 the shielding shell (31) on opposite sides, and each end of the extension is provided with a drive sprocket (52). Two transmission chains (51) are provided on the inner side of the wrapping baffle (36). A second pulley group is provided on the side of the transmission chain (51) near the inner wall of the shielding shell (31). The second pulley group is composed of several second pulleys (56). A second slide rail (312) matching the second pulley group is provided on the inner wall of the shielding shell (31).

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

3. The aluminum electrolytic cell live welding device 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 located on the inner wall of the shielding shell (31) and makes the welding gun (21) rotate in the vertical direction.

4. The aluminum electrolytic cell live welding device with external magnetic field shielding function according to claim 1, characterized in that, The shielding shell (31) is provided with a horizontal slide rail (61) extending vertically on the side 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). One side of the vertical slider (72) is fixedly connected to the end of the welding mechanism (2).

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

6. The aluminum electrolytic cell live welding device with external magnetic field shielding function according to claim 1, characterized in that, The bottom of the fixed bracket (1) is provided with several universal pulleys (13) and several support feet (14). The top of the support feet (14) is provided with an adjusting threaded rod (15) that passes through the top of the fixed bracket (1). The bottom of the fixed bracket (1) is provided with a threaded hole that matches the adjusting threaded rod (15).

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