Anode busbar repair welding equipment for aluminum electrolytic cell

Abstract

The application discloses an aluminum electrolysis cell anode busbar repairing and welding equipment and relates to the technical field of aluminum electrolysis. The equipment comprises a supporting frame, a welding mechanical arm arranged on the supporting frame and used for welding and repairing the anode busbar, a ball screw, a driving motor one, a movable base, an auxiliary mechanical arm, a cooling bin, a storage box, a cooling pipe, a circulating pump, a heat dissipation fin, a heat dissipation fan, a driving motor two, a supporting cylinder, a sliding support column, a movable handle, a limiting column, a connecting support ring, a connecting belt, an inner recess wheel and an outer convex wheel are arranged in cooperation, the welding seam and the heat affected zone can be cooled synchronously, the inner recess wheel and the outer convex wheel can reciprocally roll along the welding seam direction, the inner recess wheel rolling pressure forces the high-temperature plastic metal to flow to the center of the welding seam to offset the cracking tensile strain, the outer convex wheel rolling pressure rolls off and extends the compression deformation generated by the cooling shrinkage, the heat affected zone softening is effectively inhibited, and the welding residual stress is reduced.

Description

Technical Field

[0001] This invention relates to the field of aluminum electrolysis technology, specifically to a welding and repair device for the anode busbar of an aluminum electrolysis cell. Background Technology

[0002] The aluminum electrolytic cell is the core equipment in aluminum electrolytic production. Its anode busbar carries a huge direct current of hundreds of kiloamperes and is an important component of the power supply system. The surface quality of the anode busbar directly affects its contact resistance and conductivity with the anode conductor, thus affecting the energy consumption level and operational stability of the electrolytic cell.

[0003] In existing technologies, when the surface damage of the anode busbar is severe enough to affect normal conductivity, welding repair is required. However, aluminum busbars, due to their material properties, have high thermal conductivity and a large coefficient of linear expansion, making them extremely sensitive to heat input during welding. During welding, the high-temperature thermal cycle acting on the busbar surface causes coarsening or re-dissolution of the strengthening phase in the heat-affected zone, increasing grain size and leading to significant softening in this area. This reduces material strength and hardness, affecting subsequent service life. Simultaneously, due to its large coefficient of expansion, the busbar undergoes dramatic expansion and contraction during welding heating and cooling. Uneven distribution of welding heat input results in significant internal stress and shrinkage deformation in the weld and surrounding area, easily inducing weld cracking, affecting the conductive contact performance of the repair interface, and increasing contact resistance and energy loss. Therefore, based on the above research and combined with existing technologies, a welding device for repairing aluminum electrolytic cell anode busbars is proposed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a welding device for repairing the anode busbar of an aluminum electrolysis cell, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A welding and repair device for the anode busbar of an aluminum electrolytic cell, comprising a support frame, and further comprising:

[0007] A welding robotic arm, mounted on the support frame, is used for welding and repairing the anode busbar;

[0008] The welding and rolling mechanism is mounted on the support frame and includes a motion unit, a cooling unit, a rolling unit, and a pressure regulating unit.

[0009] The motion unit is used to drive the welding rolling mechanism to move in three-dimensional space and generate driving force;

[0010] The cooling unit is used to cool the weld and heat-affected zone after welding is completed;

[0011] The rolling unit includes an inner concave wheel and an outer cam rotatably connected to the rear side of the cooling unit. The middle part of the inner concave wheel is recessed to roll the weld toe to prevent welding hot cracks. The middle part of the outer cam is convex to roll the weld to reduce welding residual stress and reduce welding deformation.

[0012] The pressure regulating unit is used to adjust the pressure of the inner concave wheel and the outer cam on the weld, and to realize the automatic reset of the rolling unit;

[0013] A milling robot arm, mounted on the support frame, is used to mill the repaired area.

[0014] A drive mechanism, located inside the support frame, is used to drive the welding and rolling mechanism and the milling robot arm to move sequentially to the working position.

[0015] Furthermore, the motion unit includes an auxiliary robotic arm and a mounting plate. The auxiliary robotic arm is mounted on the top surface of the movable mounting plate, and the mounting plate is mounted on the auxiliary robotic arm. The cooling unit and the pressure regulating unit are both disposed on the mounting plate.

[0016] Furthermore, the cooling unit includes a cooling chamber, a storage tank, cooling pipes, a delivery pipe, a return pipe, a circulation pump, heat dissipation fins, and cooling fans. The cooling chamber is fixedly installed on the front side of the bottom of the mounting plate. The cooling pipes are fixedly installed inside the cooling chamber and are arranged in an S-shape. The storage tank is fixedly installed on the bottom surface of the mounting plate by a positioning block. The left end of the cooling pipe is connected to the liquid inlet of the circulation pump through the delivery pipe, and the right end of the cooling pipe is connected to the storage tank through the return pipe. The circulation pump is fixedly installed on the front side of the storage tank. Several heat dissipation fins are provided and fixedly installed on the bottom surface of the storage tank. The upper part of the heat dissipation fins extends into the interior of the storage tank. The multiple heat dissipation fins are arranged along the length direction of the storage tank. Two cooling fans are provided and fixedly installed on the bottom surface of the storage tank. The airflow direction of the two cooling fans is parallel to the multiple heat dissipation fins.

[0017] Furthermore, the compaction unit also includes a first support frame, a limiting frame, and a second support frame. The first support frame is slidably connected to the bottom surface of the mounting plate, the limiting frame is slidably connected to the interior of the first support frame, and the second support frame is slidably connected to the interior of the limiting frame. The concave inner wheel and the outer outer cam are both rotatably connected to the interior of the second support frame. The concave inner wheel is located to the right of the outer cam, and the cooling chamber is located in front of the concave inner wheel and the outer cam.

[0018] Furthermore, the motion unit also includes a positioning bracket, a support ring, a connecting support ring, a support cylinder, a sliding support column, a connecting belt, a movable handle, a limiting column, a trapezoidal block, and a second drive motor. The positioning bracket is fixedly installed on the top surface of the mounting plate. The support ring is fixedly installed on the front side of the positioning bracket. The connecting support ring is rotatably connected to the outer circular wall of the support ring. The support cylinder is rotatably connected to the front side of the positioning bracket. The sliding support column is slidably connected to the inner circular wall of the support cylinder. A second spring is fixedly installed on the rear side inside the support cylinder. The connecting belt is fixedly installed on the left side of the first support frame. The side of the connecting belt is fixedly connected to the outer circular wall of the connecting support ring. The movable handle is fixedly installed on the front end of the sliding support column. The limiting column is fixedly installed on the front side of the connecting support ring. The length of the limiting column is greater than the thickness of the movable handle. The trapezoidal block is fixedly installed on the front side of the support ring. The second drive motor for driving the support cylinder to rotate is fixedly installed on the rear side of the positioning bracket.

[0019] Furthermore, the inner circular wall of the support cylinder is provided with several limiting semi-grooves, and the outer circular wall of the sliding support column is fixedly installed with several semi-protruding columns, which are slidably connected to the limiting semi-grooves.

[0020] Further, the pressure regulating unit includes an electric push rod, a connecting rod, a spring, a connecting base block, a support slide rod, a spring, a movable rod, and a movable rod. Two connecting rods are provided and fixedly installed on the rear side of the support frame. The connecting rod passes through the limiting frame and extends to the outside of the limiting frame. The spring is movably sleeved on the outer circular wall of the connecting rod. The electric push rod is fixedly installed on the inner side of the support frame. The telescopic shaft of the electric push rod is fixedly connected to the rear side of the limiting frame. An installation hole is provided on the top surface of the mounting plate. The connecting base block is fixedly installed on the top surface of the support frame. The support slide rod is fixedly installed inside the installation hole. The connecting base block and the support slide rod are slidably connected. The spring is movably sleeved on the outer circular wall of the support slide rod. The movable rod is rotatably connected to the top surface of the connecting base block. The movable rod is rotatably connected to the top surface of the mounting plate. The right end of the movable rod is rotatably connected to the left end of the movable rod.

[0021] Furthermore, a control box 2 is fixedly installed on the top surface of the movable carrier plate 2, and a control box 1 is fixedly installed on the top surface of the movable carrier plate 1.

[0022] Furthermore, the driving mechanism includes a ball screw and a first drive motor. The ball screw is rotatably connected to the inside of the support frame via a bearing. The first drive motor is installed on the right side of the support frame. The drive shaft of the first drive motor passes through the support frame and is fixedly connected to the right end of the ball screw. Two movable bases are threadedly connected to the outer circular wall of the ball screw. The bottom surface of the first movable carrier plate and the bottom surface of the second movable carrier plate are respectively fixedly connected to the top surfaces of the two movable bases. The driving mechanism also includes a stabilizing unit for maintaining the stability of the first movable carrier plate and the second movable carrier plate.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. By coordinating the ball screw, drive motor one, movable base, auxiliary robotic arm, cooling chamber, storage box, cooling pipe, circulating pump, heat dissipation fins, heat dissipation fan, drive motor two, support cylinder, sliding support column, movable handle, limit column, connecting support ring, connecting belt, inner concave wheel, and outer cam, the weld and heat-affected zone can be cooled synchronously. Drive motor two drives the connecting belt to periodically wind and release through the support cylinder, sliding support column, and movable handle, causing support frame one to slide back and forth, making the inner concave wheel and outer cam roll back and forth along the weld direction. The inner concave wheel's rolling pressure causes the high-temperature ductile metal to flow towards the center of the weld to offset the cracking tensile strain. The outer cam's rolling pressure rolls open and extends the compressive deformation caused by cooling contraction. This solves the problems of softening of the heat-affected zone and difficulty in controlling welding stress deformation during aluminum busbar welding repair, effectively suppressing softening of the heat-affected zone, preventing the generation of welding hot cracks, reducing welding residual stress, and minimizing welding deformation. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a schematic diagram of the connection structure between the support frame and the movable carrier plate of the present invention;

[0027] Figure 3 This is a front view schematic diagram of the connection structure of the positioning bracket and the connecting support ring of the present invention;

[0028] Figure 4 This is a bottom view schematic diagram of the connection structure between the storage box and the cooling fan of the present invention;

[0029] Figure 5 This is a bottom view schematic diagram of the connection structure of the connecting strip and the connecting support ring of the present invention;

[0030] Figure 6 This is a bottom view schematic diagram of the connection structure between the support rod and the sliding block of the present invention;

[0031] Figure 7This is a schematic diagram of the connection structure between movable rod one and movable rod two of the present invention;

[0032] Figure 8 This is a schematic diagram of the connection structure between the support ring and the limiting ring of the present invention;

[0033] Figure 9 This is a schematic diagram of the connection structure between the movable base and the ball screw of the present invention;

[0034] Figure 10 This is a schematic diagram of the connection structure between the movable base and the mounting side plate of the present invention;

[0035] Figure 11 This is a left view schematic diagram of the connection structure between the movable bracket and the positioning rod of the present invention;

[0036] Figure 12 This is a schematic diagram of the connection structure between the support cylinder and the sliding support column of the present invention.

[0037] In the diagram: 1. Support frame; 2. Movable carrier plate one; 3. Movable carrier plate two; 4. Ball screw; 5. Drive motor one; 6. Support slide rail; 7. Control box one; 8. Control box two; 9. Welding robotic arm; 10. Auxiliary robotic arm; 11. Mounting carrier plate; 12. Cooling chamber; 13. Storage box; 14. Support frame one; 15. Positioning bracket; 16. Connecting support ring; 17. Drive motor two; 18. Cooling fan; 19. Semi-convex column; 20. Heat dissipation fins; 21. Positioning block; 22. Cooling pipe; 23. Return pipe; 24. Conveying pipe; 25. Circulating pump; 26. Connecting belt; 27. Limiting frame; 28. Support frame two; 29. ​​Concave wheel; 30. External cam; 31. Support hole; 32. Support rod; 33. Sliding block; 34. Electric push rod one; 3 5. Connecting rod; 36. Spring 1; 37. Movable rod 1; 38. Support cylinder; 39. Limiting post; 40. Movable handle; 41. Trapezoidal block; 42. Support ring; 43. Limiting ring; 44. Annular groove; 45. Movable rod 2; 46. Support plate; 47. Support slider; 48. Movable base; 49. Mounting side plate; 50. Fixed bracket; 51. Positioning slot; 52. Electric push rod 2; 53. Movable bracket; 54. Positioning rod; 55. Limiting rod; 56. Movable seat; 57. Movable plate; 58. Positioning block; 59. Limiting slide rail; 60. Milling robot arm; 61. Spring 2; 62. Limiting half groove; 63. Mounting hole; 64. Connecting base block; 65. Supporting slide rod; 66. Spring 3; 67. Limiting slider; 68. Sliding support post. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In one typical embodiment of this application, please refer to Figures 1-12 A welding and repair device for anode busbars of an aluminum electrolytic cell includes a support frame 1, which is used to support and install various functional components of the device. The support frame 1 is located next to the anode busbars on both sides of the aluminum electrolytic cell. The top surface of the support frame 1 is slidably connected to a movable carrier plate 1 2 and a movable carrier plate 2 3. A welding robotic arm 9 is fixedly installed on the movable carrier plate 1 2 for welding and repairing the anode busbars on both sides of the aluminum electrolytic cell.

[0040] The top surface of movable carrier plate 1 2 is equipped with a welding rolling mechanism, and the top surface of movable carrier plate 2 3 is fixedly installed with a milling robot arm 60, which is used to mill the position after welding repair.

[0041] Two support sliders 47 are fixedly installed on the bottom surface of both movable carrier plate 1 2 and movable carrier plate 2 3. Two support slide rails 6 are fixedly installed on the top surface of support frame 1. The two support slide rails 6 are arranged parallel to each other along the length direction of support frame 1. The support sliders 47 are slidably connected to the support slide rails 6. Through the cooperation of the support slide rails 6 and the support sliders 47, movable carrier plate 1 2 and movable carrier plate 2 3 can slide smoothly along the length direction of support frame 1.

[0042] A drive mechanism, located inside the support frame 1, drives the welding and rolling mechanism and the milling robot arm 60 to move sequentially to their working positions. The drive mechanism includes a ball screw 4, which is rotatably connected to the support frame 1 via bearings. A drive motor 5 is mounted on the right side of the support frame 1. The drive shaft of the drive motor 5 passes through the right side wall of the support frame 1 and is fixedly connected to the right end of the ball screw 4. Two movable bases 48 are threadedly connected to the outer circular wall of the ball screw 4. The bottom surface of movable carrier plate 2 is fixedly connected to the top surface of the movable base 48 located on the left, and the bottom surface of movable carrier plate 3 is fixedly connected to the top surface of the movable base 48 located on the right. The drive mechanism also includes a stabilizing unit for maintaining the stability of movable carrier plate 2 and movable carrier plate 3. It includes a support plate 46, which is fixedly installed inside the support frame 1. The support plate 46 is located below the ball screw 4 along the length of the support frame 1. Several positioning slots 51 are provided on both the front and rear sides of the support plate 46. The positioning slots 51 are triangular slots and are arranged at equal intervals along the length of the support plate 46.

[0043] A mounting side plate 49 is fixedly installed on the bottom surface of the movable base 48. An electric push rod 52 and a fixed bracket 50 are fixedly installed on the right side of the mounting side plate 49. The fixed bracket 50 has a U-shaped structure and is located below the electric push rod 52. A limit slide rail 59 is fixedly installed inside the fixed bracket 50. Two limit sliders 67 are slidably connected on the limit slide rail 59. A movable locking plate 57 is fixedly installed on the left side of the limit slider 67. Positioning blocks 58 are fixedly installed on both sides of the two movable locking plates 57 facing each other. The positioning blocks 58 are triangular and are movably engaged with the positioning slots 51. A movable seat 56 is fixedly installed on the top surface of the movable plate 57. The movable seat 56 has a U-shaped structure. The interior of the movable seat 56 is rotatably connected to a limit rod 55 via a rotating shaft. The lower ends of the two limit rods 55 are close together but the upper ends are far apart. The corner position of the limit rod 55 is rotatably connected to the mounting side plate 49 via a rotating shaft. The lower end of the limit rod 55 is rotatably connected to the movable seat 56 via a rotating shaft. A movable bracket 53 is fixedly installed on the bottom surface of the telescopic shaft of the electric push rod 52. The movable bracket 53 has a U-shaped structure. The interior of the movable bracket 53 is coaxially connected to two positioning rods 54 via a rotating shaft. The two positioning rods 54 are symmetrically arranged. The lower end of the positioning rod 54 is rotatably connected to the upper end of the limit rod 55 via a rotating shaft.

[0044] In the above-mentioned features, when in use, drive motor 5 starts, and the drive shaft of drive motor 5 rotates, causing ball screw 4 to rotate. The rotation of ball screw 4 causes the two movable bases 48 to move movable carrier plate 2 and movable carrier plate 3 along the length direction of support frame 1, respectively. When the positions of movable carrier plate 1 2 and movable carrier plate 2 3 need to be moved, the telescopic axis of electric push rod 2 52 moves upward, causing movable bracket 53 to move upward. The upward movement of movable bracket 53 causes the upper ends of the two positioning rods 54 to move upward. Since the lower end of positioning rod 54 is rotatably connected to the upper end of limiting rod 55 and the corner position of limiting rod 55 is rotatably connected to mounting side plate 49, the two positioning rods 54 rotate inward, causing the upper end of limiting rod 55 to rotate inward. The lower end of limiting rod 55 causes movable plate 57 and positioning block 58 to move outward. Positioning block 58 moves outward and separates from positioning slot 51 on support plate 46. Limiting slider 67 slides along limiting slide rail 59 to guide and limit the movement of movable plate 57.

[0045] After movable carrier plate 1 2 and movable carrier plate 2 3 move to the next position, the telescopic shaft of electric push rod 2 52 resets and moves downward, causing movable bracket 53 to move downward. The two positioning rods 54 rotate outward, the upper end of the limiting rod 55 rotates outward, and the lower end of the limiting rod 55 causes movable plate 57 and positioning block 58 to move inward and reset. Positioning block 58 engages with positioning slot 51 again, locking the position of movable carrier plate 1 2 and movable carrier plate 2 3.

[0046] The triangular positioning block 58 engages with the triangular positioning slot 51 to form a self-locking mechanism in the horizontal direction, which can effectively prevent the welding rolling mechanism and milling robot arm 60 on the movable carrier plate 1 2 and movable carrier plate 2 3 from shaking during use, thereby improving the accuracy of welding and milling.

[0047] Through the aforementioned driving mechanism, the welding robotic arm 9, the welding rolling mechanism, and the milling robotic arm 60 move sequentially to the working position. First, the movable carrier plate 2 3 moves to the welding position, and the welding robotic arm 9 performs welding repair on the anode busbar. Next, the movable carrier plate 1 2 moves to the welding position, and the welding rolling mechanism cools and rolls the weld. Finally, the movable carrier plate 2 3 moves to the welding position again, and the milling robotic arm 60 mills the repaired welding position on the anode busbar.

[0048] The motion unit is used to drive the welding and rolling mechanism to move in three-dimensional space and generate driving force. The motion unit is set on the top surface of the movable carrier plate 2. The motion unit includes an auxiliary robotic arm 10, a mounting plate 11, a positioning bracket 15, a support ring 42, a connecting support ring 16, a limiting ring 43, an annular groove 44, a support cylinder 38, a sliding support column 68, a semi-convex column 19, a limiting semi-groove 62, a second spring 61, a connecting belt 26, a movable handle 40, a limiting column 39, a trapezoidal block 41, and a second drive motor 17.

[0049] The auxiliary robotic arm 10 is fixedly installed on the top surface of the movable carrier plate 2. The end of the auxiliary robotic arm 10 is fixedly installed with the mounting carrier plate 11. The auxiliary robotic arm 10 is used to drive the mounting carrier plate 11 and the components installed on it to move in three-dimensional space, so that the welding rolling mechanism can follow the welding path of the welding robotic arm 9.

[0050] A positioning bracket 15 is fixedly mounted on the top surface of the mounting plate 11, and a second drive motor 17 is fixedly mounted on the rear side of the positioning bracket 15. A support cylinder 38 is rotatably connected to the front side of the positioning bracket 15 via a bearing. The drive shaft of the second drive motor 17 passes through the positioning bracket 15 and is fixedly connected to the rear side of the support cylinder 38. When the second drive motor 17 is started, the drive shaft rotates, causing the support cylinder 38 to rotate.

[0051] A sliding support column 68 is slidably connected to the inner circular wall of the support cylinder 38, and its outer circular wall is slidably engaged with the inner circular wall of the support cylinder 38. Several limiting semi-grooves 62 are formed on the inner circular wall of the support cylinder 38. Each limiting semi-groove 62 is a semi-cylindrical groove. Several semi-protruding columns 19 are fixedly installed on the outer circular wall of the sliding support column 68. Each semi-protruding column 19 is a semi-cylindrical protrusion, and each semi-protruding column 19 corresponds one-to-one with a limiting semi-groove 62. The semi-protruding columns 19 are slidably connected inside the limiting semi-grooves 62. Through the sliding engagement of the semi-protruding columns 19 and the limiting semi-grooves 62, the sliding support column 68 can slide along the axial direction of the support cylinder 38 while being circumferentially limited, preventing the sliding support column 68 from rotating inside the support cylinder 38.

[0052] A second spring 61 is fixedly installed inside the rear side of the support cylinder 38. One end of the second spring 61 is fixedly connected to the rear side of the support cylinder 38, and the other end of the second spring 61 is fixedly connected to the rear end of the sliding support column 68.

[0053] A support ring 42 is fixedly installed on the front side of the positioning bracket 15. A connecting support ring 16 is rotatably connected to the outer circular wall of the support ring 42, and its inner circular wall is rotatably engaged with the outer circular wall of the support ring 42. A limiting ring 43 is fixedly sleeved on the outer circular wall of the support ring 42. An annular groove 44 is formed on the inner circular wall of the connecting support ring 16. The limiting ring 43 is embedded in the annular groove 44 and rotatably connected to the annular groove 44. Through the engagement of the limiting ring 43 and the annular groove 44, the connecting support ring 16 can rotate around the outer circular wall of the support ring 42, while being axially limited to prevent the connecting support ring 16 from falling off the support ring 42.

[0054] A movable handle 40 is fixedly installed at the front end of the sliding support column 68, and the movable handle 40 rotates synchronously with the sliding support column 68. A limiting post 39 is fixedly installed on the front side of the connecting support ring 16. The limiting post 39 is set on the rotation path of the movable handle 40, and the length of the limiting post 39 is greater than the thickness of the movable handle 40.

[0055] A trapezoidal block 41 is fixedly installed on the front side of the support ring 42. The trapezoidal block 41 has a wedge-shaped structure and one side of the trapezoidal block 41 is an inclined surface. A connecting strip 26 is fixedly connected to the outer circular wall of the connecting support ring 16. The connecting strip 26 has a flexible strip structure and one end of the connecting strip 26 is fixedly connected to the outer circular wall of the connecting support ring 16.

[0056] In the above-mentioned features, when the second drive motor 17 starts, the drive shaft of the second drive motor 17 rotates, causing the support cylinder 38 to rotate. The rotation of the support cylinder 38, through the cooperation of the limiting half-groove 62 and the semi-protruding post 19, causes the sliding support post 68 to rotate synchronously. The rotation of the sliding support post 68 causes the movable handle 40 to rotate. During the rotation of the movable handle 40, the movable handle 40 contacts the limiting post 39, and the movable handle 40 pushes the connecting support ring 16 to rotate around the support ring 42 through the limiting post 39. The rotation of the connecting support ring 16 causes the connecting strip 26 to wrap around the outer circular wall surface of the connecting support ring 16, and the connecting strip 26 pulls the support frame 14 to slide along the bottom surface of the mounting plate 11.

[0057] When the movable handle 40 rotates to contact the trapezoidal block 41, the movable handle 40 slides along the inclined surface of the trapezoidal block 41. The outward movement of the movable handle 40 drives the sliding support column 68 to move outward along the inside of the support cylinder 38, while simultaneously stretching the second spring 61. After the movable handle 40 moves outward, it separates from the limiting column 39, losing the continuous driving force of the movable handle 40. The elastic force of the third spring 66 causes the support frame 14 to reset. The reset of the support frame 14 drives the connecting support ring 16 to rotate and reset via the connecting belt 26. Through the continuous rotation of the second drive motor 17, the movable handle 40 periodically pushes the limiting column 39 and slides and separates along the inclined surface of the trapezoidal block 41, realizing the reciprocating sliding of the support frame 14. This allows the rolling roller set to roll back and forth along the weld direction, uniformly rolling the entire weld.

[0058] The cooling unit is used to cool the weld and heat-affected zone after welding to prevent the heat-affected zone from softening. The cooling unit is located on the front side of the bottom of the mounting plate 11. The cooling unit includes a cooling chamber 12, a storage box 13, a positioning block 21, a cooling pipe 22, a delivery pipe 24, a return pipe 23, a circulation pump 25, heat dissipation fins 20, and a cooling fan 18.

[0059] Specifically, the cooling chamber 12 is fixedly installed on the front side of the bottom of the mounting plate 11, and is made of a metal material with good thermal conductivity. The length of the cooling chamber 12 is greater than the width of the weld, so that the cooling chamber 12 can completely cover the weld and the heat-affected zone on both sides. The cooling pipe 22 is fixedly installed inside the cooling chamber 12. The cooling pipe 22 is arranged in an S-shape inside the cooling chamber 12. The cooling pipe 22 is made of a metal tube with good thermal conductivity. Its S-shaped structure increases the flow path length of the coolant inside the cooling chamber 12 and the heat exchange area.

[0060] A positioning block 21 is fixedly installed on the bottom surface of the mounting plate 11. A storage tank 13 is fixedly installed on the bottom surface of the positioning block 21, and the storage tank 13 contains coolant. A delivery pipe 24 is fixedly installed at the left end of the cooling pipe 22. The delivery pipe 24 has an L-shaped structure, with one end fixedly connected to and communicating with the left end of the cooling pipe 22, and the other end penetrating the side wall of the cooling chamber 12 and fixedly connected to the inlet of the circulating pump 25. A return pipe 23 is fixedly installed at the right end of the cooling pipe 22. The return pipe 23 has an L-shaped structure, with one end fixedly connected to and communicating with the right end of the cooling pipe 22, and the other end penetrating the side wall of the storage tank 13 and communicating with the interior of the storage tank 13. A circulating pump 25 is fixedly installed at the front of the storage tank 13, with its outlet communicating with the interior of the storage tank 13. The circulating pump 25 is used to pump the coolant inside the storage tank 13 into the cooling pipe 22. Several heat dissipation fins 20 are fixedly installed on the bottom surface of the storage tank 13. The upper part of the heat dissipation fins 20 extends into the interior of the storage tank 13. The heat dissipation fins 20 are used to conduct heat from the coolant inside the storage tank 13 to the external environment. Two cooling fans 18 are fixedly installed on the bottom surface of the storage tank 13. The two cooling fans 18 are respectively located on the left and right sides of the heat dissipation fins 20. The airflow direction of the cooling fans 18 is horizontal, and the airflow direction of the two cooling fans 18 is parallel to the heat dissipation fins 20.

[0061] Specifically, when the circulation pump 25 starts, it pumps the coolant inside the storage tank 13 to the cooling pipe 22 through the delivery pipe 24. The coolant flows continuously along the S-shaped cooling pipe 22. After the welding robotic arm 9 welds the anode busbar to form a weld, the auxiliary robotic arm 10 moves the cooling chamber 12 so that the bottom surface of the cooling chamber 12 comes into contact with the weld. Due to the good thermal conductivity of the cooling chamber 12, the heat from the weld is transferred to the coolant inside the cooling pipe 22 through the cooling chamber 12. After absorbing the heat, the coolant returns to the storage tank 13 through the return pipe 23. The heat from the coolant is transferred to multiple heat dissipation fins 20. The two cooling fans 18 rotate to generate airflow. The airflow flows along the surface of the heat dissipation fins 20 and carries away the heat from the heat dissipation fins 20, thereby cooling the coolant inside the storage tank 13.

[0062] Through the above-mentioned cyclic cooling process, the coolant can continuously cool the weld and the heat-affected zone, preventing the heat-affected zone from softening due to high temperature. The welding robot arm 9 welds the anode busbar from top to bottom, and the auxiliary robot arm 10 also drives the cooling chamber 12 to move downward along the weld welded by the welding robot arm 9. The welding robot arm 9 and the auxiliary robot arm 10 work together to cool the heat-affected zone and the weld immediately when the weld is formed, realizing cooling during welding.

[0063] The rolling unit is used to roll the weld toe and weld seam to prevent welding hot cracking, reduce welding residual stress, and minimize welding deformation. The rolling unit is located on the bottom surface of the mounting plate 11, behind the cooling chamber 12. The rolling unit includes a support frame 14, a limiting frame 27, a support frame 28, an inner concave wheel 29, an outer cam 30, a support hole 31, a support rod 32, a sliding block 33, a connecting rod 35, a spring 1 36, a mounting hole 63, a connecting base block 64, a support slide rod 65, a spring 3 66, a movable rod 1 37, and a movable rod 2 45.

[0064] Support frame 14 is slidably connected to the bottom surface of mounting plate 11. Mounting plate 11 has a mounting hole 63 on its top surface. A connecting base block 64 is fixedly mounted on the top surface of support frame 14. A support slide rod 65 is fixedly mounted inside the mounting hole 63, extending along the length of the mounting hole 63. The connecting base block 64 and the support slide rod 65 are slidably connected. A spring 66 is movably sleeved on the outer circular wall of the support slide rod 65. One end of the spring 66 is fixedly connected to the right side of the connecting base block 64, and the other end is fixedly connected to the left side of the inside of the mounting hole 63.

[0065] The top surface of the connecting base block 64 is rotatably connected to a movable rod 45, and the top surface of the mounting plate 11 is rotatably connected to a movable rod 37. The right end of the movable rod 45 is rotatably connected to the left end of the movable rod 37, which is used to guide and limit the sliding of the support frame 14.

[0066] A limiting frame 27 is slidably connected inside the support frame 14. The limiting frame 27 has a U-shaped frame structure. A support hole 31 is provided on the bottom surface of the support frame 14, which is arranged along the length of the support frame 14. A sliding block 33 is fixedly installed on the bottom surface of the limiting frame 27. A support rod 32 is fixedly installed inside the support hole 31, which is arranged along the length of the support hole 31. The sliding block 33 and the support rod 32 are slidably connected.

[0067] Through the cooperation of the sliding block 33 and the support rod 32, the limiting frame 27 can slide smoothly along the interior of the support frame 14. A second support frame 28 is slidably connected inside the limiting frame 27. The second support frame 28 has a U-shaped frame structure, and an inner concave wheel 29 and an outer cam 30 are rotatably connected inside the second support frame 28. Both the inner concave wheel 29 and the outer cam 30 are arranged horizontally. The middle part of the inner concave wheel 29 is recessed for pressing the weld toe; the middle part of the outer cam 30 is convex for pressing the weld seam. The inner concave wheel 29 is located to the right of the outer cam 30, and the cooling chamber 12 is located in front of the inner concave wheel 29 and the outer cam 30.

[0068] Specifically, when the drive motor 17 pulls the support frame 14 along the mounting plate 11 via the connecting belt 26, the support frame 14 drives the inner concave wheel 29 and the outer cam 30 to reciprocate along the weld direction. The concave shape of the inner concave wheel 29 causes its two side rims to press against the weld toe, applying inward compressive force to the weld toe metal in a high-temperature, ductile state, forcing the metal to flow towards the weld center, offsetting the tensile strain that causes cracking, and preventing welding hot cracks. The outer cam 30 moves with the inner concave wheel 29, and its raised rim acts directly on the weld centerline, rolling away and extending the compressive deformation caused by cooling and contraction, reducing welding residual stress, and minimizing welding deformation.

[0069] The pressure regulating unit is used to adjust the pressure of the inner concave wheel 29 and the outer cam 30 on the weld and to realize the automatic reset of the rolling unit. The pressure regulating unit is set on the support frame 14 and the limit frame 27. The pressure regulating unit includes an electric push rod 34, a connecting rod 35, a spring 36, a connecting base block 64, a support slide rod 65, a spring 66, a movable rod 37, a movable rod 45, a sliding block 33, and a support rod 32.

[0070] An electric push rod 34 is fixedly installed inside the rear side of the support frame 14, with its telescopic shaft arranged horizontally and fixedly connected to the rear side of the limiting frame 27. A connecting rod 35 is fixedly installed on the rear side of the support frame 28, passing through the rear side wall of the limiting frame 27 and slidingly engaging with it. A spring 36 is movably sleeved on the outer circular wall of the connecting rod 35, with one end fixedly connected to the rear side of the support frame 28 and the other end fixedly connected to the inner rear side of the limiting frame 27. The spring 36 is a compression spring, always applying a forward elastic force to the support frame 28.

[0071] Specifically, when the telescopic shaft of the electric push rod 34 moves forward, it pushes the limiting frame 27 forward. The limiting frame 27 drives the support frame 28 forward, and the inner concave wheel 29 and outer cam 30 move closer to the weld, increasing the rolling pressure. The spring 36 is compressed, and its elastic force keeps the rolling wheel in elastic contact with the weld, preventing excessive pressure from damaging the weld surface. When the movable handle 40 contacts the trapezoidal block 41 and slides away along its inclined surface, the elastic force of the spring 66 causes the connecting base block 64 to slide to the left along the support slide rod 65 to reset, driving the support frame 14 to reset. This, in turn, drives the connecting support ring 16 to reset via the connecting belt 26, thus achieving automatic reset of the rolling unit. The cooperation between the sliding block 33 and the support rod 32, as well as the cooperation between the connecting base block 64 and the support slide rod 65, ensures smooth sliding of each component.

[0072] The welding rolling mechanism, consisting of a motion unit, a cooling unit, a rolling unit, and a pressure adjusting unit, works in concert to complete the welding process. Its overall workflow is as follows:

[0073] After the welding robotic arm 9 welds the anode busbar to form a weld, the auxiliary robotic arm 10, as the core of the motion unit, drives the mounting plate 11 and the cooling unit and rolling unit mounted on it to move to the weld position.

[0074] First, the cooling unit starts operating. The auxiliary robotic arm 10 moves the cooling chamber 12 until its bottom surface contacts the weld. The circulation pump 25 starts, and the coolant inside the storage tank 13 enters the S-shaped cooling pipe 22 through the delivery pipe 24. The coolant flows in the cooling pipe 22 and carries away the heat from the weld and heat-affected zone through the thermally conductive cooling chamber 12. The coolant that has absorbed heat returns to the storage tank 13 through the return pipe 23. The heat dissipation fins 20 conduct the heat away, and the cooling fan 18 rotates to generate airflow that carries away the heat from the heat dissipation fins 20, completing the circulation and cooling of the coolant. As the welding robotic arm 9 continues to weld downwards, the auxiliary robotic arm 10 moves the cooling chamber 12 synchronously downwards along the weld, achieving cooling during welding and preventing softening of the heat-affected zone.

[0075] Simultaneously, the rolling unit works in concert. Drive motor 217 starts, and through the transmission of support cylinder 38, sliding support column 68, movable handle 40, limiting column 39, and connecting support ring 16, the connecting belt 26 is periodically wound and released, pulling support frame 14 to slide reciprocally along the bottom surface of mounting plate 11. Support frame 14 drives limiting frame 27, support frame 28, inner concave wheel 29, and outer cam 30 to roll reciprocally along the weld direction. The inner concave wheel 29 rolls the weld toe; its concave shape forces the weld toe metal, which is in a high-temperature, plastic state, to flow towards the weld center, offsetting the tensile strain that causes cracking and preventing welding hot cracks. The outer cam 30 rolls the weld center, spreading and extending the compressive deformation caused by the cooling and shrinkage of the weld metal, reducing residual welding stress and minimizing welding deformation.

[0076] The pressure regulating unit plays a continuous role throughout the rolling process. The electric push rod 34 pre-adjusts the extension of its telescopic shaft according to the welding process parameters, pushing the limit frame 27 and support frame 28 forward, thereby adjusting the pressure of the inner concave wheel 29 and outer cam 30 on the weld. The spring 36 is compressed, and its elasticity maintains elastic contact between the inner concave wheel 29 and outer cam 30 and the weld, ensuring sufficient rolling pressure while preventing excessive pressure from damaging the weld surface.

[0077] The aforementioned cooling unit and rolling unit, driven by the auxiliary robotic arm 10, move synchronously with the welding robotic arm 9. Working in concert, they sequentially complete the cooling and rolling processes as the weld seam is formed, achieving integrated cooling and rolling operations during welding. When the movable handle 40 separates from the limiting post 39, the elastic force of the spring 366 resets the support frame 14, which in turn drives the connecting support ring 16 to rotate and reset via the connecting belt 26, preparing for the next rolling cycle.

[0078] The milling robot arm 60 is used to mill the repaired weld area, removing excess weld material and restoring the flatness and smoothness of the anode busbar surface. The milling robot arm 60 is fixedly mounted on the top surface of the movable carrier plate 3. A control box 8 is fixedly mounted on the top surface of the movable carrier plate 3, and is electrically connected to the milling robot arm 60 for controlling its operation. Driven by the movable carrier plate 3, the milling robot arm 60 can move along the length of the support frame 1 to the welding position.

[0079] Specifically, after the welding repair of the anode busbar is completed by the welding robotic arm 9 and cooling and rolling are completed by the welding rolling mechanism, the movable carrier plate 3 moves to the welding position under the drive of the drive motor 5 and the ball screw 4. The milling robotic arm 60 then mills the repaired welding position on the anode busbar. The milling robotic arm 60 moves the milling cutter above the welding position, drives the milling cutter to rotate, and gradually lowers the milling cutter to contact the surface of the anode busbar. Then, the milling cutter moves along the length of the anode busbar to mill the surface of the weld repair area, removing the weld excess and surface defects, restoring the flatness and smoothness of the anode busbar surface. Finally, the milling robotic arm 60 moves the milling cutter out of the processing position. Through milling, the surface roughness and flatness of the weld repair area are restored to be consistent with the original anode busbar surface, ensuring good contact between the anode guide rod and the anode busbar, reducing contact resistance, and reducing power loss.

[0080] Control box 7 is fixedly installed on the top surface of movable carrier plate 2. Control box 7 is electrically connected to components such as auxiliary robotic arm 10, drive motor 17, circulating pump 25, cooling fan 18, and electric push rod 34, and is used to control the operation of various components of the welding and rolling mechanism. Both control box 7 and control box 8 are connected to an external power supply and control terminal to receive control commands and provide feedback on the equipment's operating status.

[0081] Working principle: First, move the equipment to the aluminum electrolytic cell to be repaired, position the support frame 1 next to the anode busbar on both sides of the cell, and adjust the position of the welding robotic arm 9 so that its welding torch is aligned with the contact surface to be repaired on the anode busbar.

[0082] Next, drive motor 5 starts, and the drive shaft of drive motor 5 rotates, causing ball screw 4 to rotate. The rotation of ball screw 4 causes the two movable bases 48 to move the movable carrier plate 3 to the welding position. Welding robot arm 9 starts and welds and repairs the contact surface of the anode busbar. Welding robot arm 9 continuously welds from top to bottom along the length of the anode busbar to form a weld. During the welding process, welding robot arm 9 adopts a multi-layer, multi-pass welding process, repairing the contact surface layer by layer and pass by pass.

[0083] Then, after a portion of the welding is completed and a weld seam is formed, drive motor 5 starts again, movable carrier plate 2 moves to the welding position, and auxiliary robotic arm 10 moves cooling chamber 12 to the weld seam position, with the bottom surface of cooling chamber 12 abutting against the weld seam. Circulation pump 25 starts, and coolant inside storage tank 13 enters cooling pipe 22 through delivery pipe 24. The coolant flows along the S-shaped cooling pipe 22, carrying away heat from the weld seam through the thermally conductive cooling chamber 12. The coolant that has absorbed heat returns to storage tank 13 through return pipe 23, and heat dissipation fins 20 conduct heat away. Cooling fan 18 rotates to generate airflow that carries away heat from the heat dissipation fins 20, completing the circulation and cooling of the coolant. Simultaneously, drive motor 17 starts, and through the transmission of support cylinder 38, sliding support column 68, movable handle 40, limiting column 39, and connecting support ring 16, connecting belt 26 winds and pulls support frame 14 to slide back and forth along mounting carrier plate 11. The support frame 14 drives the inner concave wheel 29 and the outer cam 30 to reciprocate along the weld direction. The inner concave wheel 29 rolls over the weld toe, forcing the high-temperature, ductile weld toe metal to flow towards the weld center, offsetting the tensile strain that causes cracking and preventing welding hot cracks. The outer cam 30 rolls over the weld center, spreading out the compressive deformation caused by the cooling and shrinkage of the weld metal, reducing residual welding stress and minimizing welding deformation. The welding robotic arm 9 continues to weld downwards, while the auxiliary robotic arm 10 drives the cooling chamber 12 and the inner concave wheel 29 and outer cam 30 to move synchronously along the weld direction, realizing integrated operation of cooling and rolling during welding.

[0084] Finally, after the welding, cooling and rolling of the entire weld seam are completed, drive motor 5 starts again, movable carrier plate 3 moves to the welding position, and milling robot arm 60 starts to mill the repaired welding position on the anode busbar to remove the welding excess, restore the flatness and smoothness of the anode busbar surface, ensure good contact between the anode guide rod and the anode busbar, reduce contact resistance and reduce power loss.

[0085] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A welding and repair device for the anode busbar of an aluminum electrolytic cell, comprising a support frame (1), characterized in that, Also includes: A welding robotic arm (9) is mounted on the support frame (1) and is used to weld and repair the anode busbar. The welding rolling mechanism is set on the support frame (1) and includes a motion unit, a cooling unit, a rolling unit and a pressure regulating unit; The motion unit is used to drive the welding rolling mechanism to move in three-dimensional space and generate driving force; The cooling unit is used to cool the weld and heat-affected zone after welding is completed; The rolling unit includes an inner concave wheel (29) and an outer cam (30) rotatably connected to the rear side of the cooling unit. The middle part of the inner concave wheel (29) is recessed and used to roll the weld toe to prevent welding hot cracks. The middle part of the outer cam (30) is convex and used to roll the weld to reduce welding residual stress and reduce welding deformation. The pressure regulating unit is used to adjust the pressure of the inner concave wheel (29) and the outer cam (30) on the weld, and to realize the automatic reset of the rolling unit; A milling robot arm (60) is mounted on the support frame (1) and is used to mill the position after welding repair; The drive mechanism is located inside the support frame (1) and is used to drive the welding rolling mechanism and the milling robot arm (60) to move sequentially to the working position.

2. The aluminum electrolytic cell anode busbar repair and welding equipment according to claim 1, characterized in that: The motion unit includes an auxiliary robotic arm (10) and a mounting plate (11). The auxiliary robotic arm (10) is mounted on the top surface of the movable mounting plate (2), and the mounting plate (11) is mounted on the auxiliary robotic arm (10). The cooling unit and the pressure regulating unit are both located on the mounting plate (11).

3. The aluminum electrolysis cell anode busbar repair and welding equipment according to claim 2, characterized in that: The cooling unit includes a cooling chamber (12), a storage tank (13), a cooling pipe (22), a delivery pipe (24), a return pipe (23), a circulation pump (25), heat dissipation fins (20), and a cooling fan (18). The cooling chamber (12) is fixedly installed on the front side of the bottom of the mounting plate (11). The cooling pipe (22) is fixedly installed inside the cooling chamber (12) and is arranged in an S-shape. The storage tank (13) is fixedly installed on the bottom surface of the mounting plate (11) by a positioning block (21). The left end of the cooling pipe (22) is connected to the liquid inlet of the circulation pump (25) through the delivery pipe (24). The right end of the pipe (22) is connected to the storage tank (13) through the return pipe (23). The circulation pump (25) is fixedly installed on the front side of the storage tank (13). Several heat dissipation fins (20) are provided and fixedly installed on the bottom surface of the storage tank (13). The upper part of the heat dissipation fins (20) extends into the interior of the storage tank (13). Several heat dissipation fins (20) are arranged along the length direction of the storage tank (13). Two heat dissipation fans (18) are provided and fixedly installed on the bottom surface of the storage tank (13). The airflow direction of the two heat dissipation fans (18) is parallel to the several heat dissipation fins (20).

4. The aluminum electrolysis cell anode busbar repair and welding equipment according to claim 3, characterized in that: The rolling unit also includes a support frame one (14), a limiting frame (27) and a support frame two (28). The support frame one (14) is slidably connected to the bottom surface of the mounting plate (11). The limiting frame (27) is slidably connected to the inside of the support frame one (14). The support frame two (28) is slidably connected to the inside of the limiting frame (27). The concave wheel (29) and the outer cam (30) are both rotatably connected to the inside of the support frame two (28). The concave wheel (29) is located on the right side of the outer cam (30). The cooling chamber (12) is located in front of the concave wheel (29) and the outer cam (30).

5. The aluminum electrolysis cell anode busbar repair and welding equipment according to claim 4, characterized in that: The motion unit further includes a positioning bracket (15), a support ring (42), a connecting support ring (16), a support cylinder (38), a sliding support column (68), a connecting belt (26), a movable handle (40), a limiting column (39), a trapezoidal block (41), and a second drive motor (17). The positioning bracket (15) is fixedly installed on the top surface of the mounting plate (11). The support ring (42) is fixedly installed on the front side of the positioning bracket (15). The connecting support ring (16) is rotatably connected to the outer circular wall of the support ring (42). The support cylinder (38) is rotatably connected to the front side of the positioning bracket (15). The sliding support column (68) is slidably connected to the inner circular wall of the support cylinder (38). A second spring (61) is fixedly installed on the rear side of the inside of the support cylinder (38). The connecting belt (26) is fixedly installed on the left side of the support frame (14). The side of the connecting belt (26) is fixedly connected to the outer circular wall of the connecting support ring (16). The movable handle (40) is fixedly installed on the front end of the sliding support column (68). The limiting column (39) is fixedly installed on the front side of the connecting support ring (16). The length of the limiting column (39) is greater than the thickness of the movable handle (40). The trapezoidal block (41) is fixedly installed on the front side of the support ring (42). The second drive motor (17) for driving the support cylinder (38) to rotate is fixedly installed on the rear side of the positioning bracket (15).

6. The aluminum electrolytic cell anode busbar repair and welding equipment according to claim 5, characterized in that: The inner circular wall of the support cylinder (38) is provided with several limiting semi-grooves (62), and the outer circular wall of the sliding support column (68) is fixedly installed with several semi-protruding columns (19), and the semi-protruding columns (19) are slidably connected to the limiting semi-grooves (62).

7. The aluminum electrolysis cell anode busbar repair and welding equipment according to claim 5, characterized in that: The pressure regulating unit includes an electric push rod (34), a connecting rod (35), a spring (36), a connecting base block (64), a support slide rod (65), a spring (66), a movable rod (37), and a movable rod (45). Two connecting rods (35) are fixedly installed on the rear side of the support frame (28). The connecting rod (35) passes through the limiting frame (27) and extends to the outside of the limiting frame (27). The spring (36) is movably sleeved on the outer circular wall of the connecting rod (35). The electric push rod (34) is fixedly installed on the inner side of the support frame (14). The telescopic shaft of the electric push rod (34) is connected to the limiting frame (27). The rear side is fixedly connected, the top surface of the mounting plate (11) is provided with a mounting hole (63), the connecting base block (64) is fixedly installed on the top surface of the support frame (14), the support slide rod (65) is fixedly installed inside the mounting hole (63), the connecting base block (64) and the support slide rod (65) are slidably connected, the spring three (66) is movably sleeved on the outer circular wall surface of the support slide rod (65), the movable rod two (45) is rotatably connected to the top surface of the connecting base block (64), the movable rod one (37) is rotatably connected to the top surface of the mounting plate (11), and the right end of the movable rod two (45) is rotatably connected to the left end of the movable rod one (37).

8. The aluminum electrolytic cell anode busbar repair and welding equipment according to claim 2, characterized in that: The top surface of the second movable carrier plate (3) is fixedly equipped with a second control box (8), and the top surface of the first movable carrier plate (2) is fixedly equipped with a first control box (7).

9. The aluminum electrolysis cell anode busbar repair and welding equipment according to claim 2, characterized in that: The driving mechanism includes a ball screw (4) and a drive motor (5). The ball screw (4) is rotatably connected to the inside of the support frame (1) through a bearing. The drive motor (5) is installed on the right side of the support frame (1). The drive shaft of the drive motor (5) passes through the support frame (1) and is fixedly connected to the right end of the ball screw (4). The outer circular wall of the ball screw (4) is threaded with two movable bases (48). The bottom surface of the movable carrier plate (2) and the bottom surface of the movable carrier plate (3) are fixedly connected to the top surfaces of the two movable bases (48) respectively. The driving mechanism also includes a stabilizing unit for keeping the movable carrier plate (2) and the movable carrier plate (3) stable.

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