Plasma welding device for large-diameter boiler shell

Abstract

The plasma welding device comprises an operation table, a machining groove is formed in the upper surface of the operation table, a first guide hole and a second guide hole are formed in the upper surface of the operation table, and an electric drive shaft is rotationally connected to the inner wall of the operation table; a plurality of friction wheels are fixedly connected to the surface of the electric drive shaft, a linkage shaft is rotationally connected to the inner wall of the operation table, and a plurality of rolling wheels are fixedly connected to the surface of the linkage shaft. Through the arrangement of the through hole, the eccentric column rotates to drive the swing plate to swing back and forth through the through hole, the welding head is made to swing and weld, manual welding operation is simulated, the friction block is arranged to move to drive the boiler shell to move together under the action of friction force, annular (transverse) welding can be achieved during welding, and welding efficiency is improved. And meanwhile, horizontal (longitudinal) welding can be switched, manual approaching is not needed during welding, and safety and labor saving are achieved.

Description

Technical Field

[0001] The invention relates to the field of welding devices, in particular to a plasma welding device for a large-caliber boiler shell. Background Art

[0002] A boiler is a device that heats water to a certain temperature or pressure and produces steam, and is used in power, power generation, or heating. The boiler shell is an important part of the main body of the boiler, usually composed of a shell, baffles, and pipes, and is used to carry the boiler's water, steam, and exhaust gas.

[0003] The existing patent with the publication number of "CN209288494U" is named a welding device for boiler manufacturing, including a base plate, a scissors fork is fixedly arranged in the center of the upper surface of the base plate, a scissors fork driving cylinder is fixedly arranged on the side of the base plate close to the scissors fork, and a support platform is fixedly arranged on the top of the scissors fork: a handrail is fixedly arranged on one side of the upper surface of the support platform, and the handrails are provided in total and evenly distributed, and a handrail is fixedly arranged on the top of the handrail, and sleeves are fixedly arranged on both sides of the lower surface of the support platform, and a spring is fixedly connected to the top of the inner wall of the sleeve, and a telescopic rod is fixedly connected to the lower part of the spring, and the outer surface of the telescopic rod is slidably connected to the inner wall of the sleeve, and the lower part of the telescopic rod passes through the bottom of the inner wall of the sleeve, and the end is fixedly connected to the base plate, and a fuel tank is fixedly arranged on one side of the upper surface of the support platform. This kind of welding device for boiler manufacturing has strong integration, simple structure, good stability, and is easy to adjust the height; The inventor believes that in addition to the need for height adjustment, the boiler shell is usually cylindrical. When welding, sometimes it is necessary to weld in a circular shape (horizontally) around the boiler shell, and sometimes it is necessary to weld horizontally (longitudinal) along the boiler shell. The existing methods are all manual handheld equipment for welding. Manual welding requires manual proximity, and there will be sparks and smoke in the process. Manual operation has certain risks. Summary of the invention

[0004] The purpose of the present application is to provide a large-diameter boiler shell plasma welding device to solve the problem raised in the above-mentioned background technology that when welding, sometimes it is necessary to weld in a circular (transverse) manner around the boiler shell, and sometimes it is necessary to weld horizontally (longitudinal) along the boiler shell. The existing methods are all manual handheld equipment for welding. Manual welding requires manual approach, and there will be sparks and smoke in the process. Manual operation has certain risks.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a large-caliber boiler shell plasma welding device, comprising an operating table, a processing groove is formed on the upper surface of the operating table, a first guide hole and a second guide hole are formed on the upper surface of the operating table, an electric drive shaft is rotatably connected to the inner wall of the operating table, a plurality of friction wheels are fixedly connected to the surface of the electric drive shaft, a linkage shaft is rotatably connected to the inner wall of the operating table, a plurality of rollers are fixedly connected to the surface of the linkage shaft, a plurality of friction wheels and rollers are penetrated in the inner wall of the processing groove, one end of the electric drive shaft penetrates one side of the operating table and is fixedly connected to the first guide hole. A driving wheel, one end of the linkage shaft passes through one side of the operating table, the surface of the linkage shaft is fixedly connected to the second driving wheel and the first driven wheel, the surfaces of the first driven wheel and the first driving wheel are sleeved with the same first belt, the inner wall of the operating table is rotatably connected to a moving shaft, one end of the moving shaft passes through the inner wall of the operating table and is fixedly connected to the second driven wheel, the surfaces of the second driven wheel and the second driving wheel are sleeved with the same second belt, the surface of the friction wheel is fixedly connected to a plurality of friction strips, a welding head is installed above the operating table, and the inner wall of the processing groove is fixedly connected to a positioning welding mechanism; The positioning welding mechanism includes a front stopper ball fixedly connected to the inner wall of the processing groove, the inner wall of the processing groove is slidably connected to a support plate, the inner wall of the support plate is installed with a rear stopper ball, the rear stopper ball and the front stopper ball are used to block the front and rear of the pot shell to be welded, and reduce the friction when the pot shell rotates, one side of the support plate is rotatably connected to a connecting block, the inner wall of the processing groove is provided with a slot, and the connecting block is adapted to the slot; The surface of the moving shaft is slidably connected with a swing welding assembly, the inner wall of the supporting plate is rotatably connected with a friction clamping assembly, and one side of the supporting plate is fixedly connected with a linkage assembly.

[0006] Preferably, the swing welding assembly comprises a sliding sleeve slidably connected to the surface of the moving shaft, one side of the sliding sleeve is fixedly connected to the first bevel gear, and the surface of the sliding sleeve is rotatably connected to a sliding cylinder.

[0007] Preferably, the swing welding assembly also includes a first magnetic strip fixedly connected to the inner wall of the first guide hole, the surface of the first magnetic strip is slidably connected to a first metal slider, the inner wall of the first metal slider is fixedly connected to a sleeve tube, the inner wall of the sleeve tube is rotatably connected to a rotating shaft, the bottom end of the rotating shaft passes through the inner wall of the slide cylinder and is fixedly connected to a second bevel gear, the second bevel gear is meshed with the first bevel gear, and the inner wall of the slide cylinder is rotatably connected to the surface of the rotating shaft.

[0008] Preferably, the swing welding assembly also includes a protective cylinder fixedly connected to the top of the sleeve cylinder, the top of the rotating shaft is fixedly connected to an eccentric column, the eccentric column is eccentrically arranged with respect to the central axis of the rotating shaft, the inner wall of the protective cylinder is fixedly connected to a second magnetic strip, the inner wall of the second magnetic strip is slidably connected to a second metal slider, and the inner wall of the second metal slider is rotatably connected to an adjustment column.

[0009] Preferably, the swing welding assembly also includes a swing plate installed inside the protective tube, a first sliding hole is opened on the upper surface of the swing plate, a crescent plate is slidably connected to the inner wall of the first sliding hole, a pair of opposite surfaces of the crescent plate are rotatably connected to the surface of the adjusting column, the inner wall of the swing plate is fixedly connected to the surface of the welding head, the swing welding assembly also includes a through hole opened on the upper surface of the swing plate, and the eccentric column is installed inside the through hole.

[0010] Preferably, the friction clamping assembly includes a torsion rod rotatably connected to the inner wall of the support plate, one end of the torsion rod is fixedly connected to a petal plate, one side of the support plate is fixedly connected to a guide cylinder, the inner wall of the guide cylinder is slidably connected to a positioning block, the inner wall of the positioning block is fixedly connected to a resist column, one end of the resist column passes through the surface of the guide cylinder and is fixedly connected to the friction block, the surface of the resist column is sleeved with a second spring, one end of the second spring is fixedly connected to the surface of the positioning block, and the other end of the second spring is fixedly connected to the inner surface of the guide cylinder.

[0011] Preferably, the friction clamping assembly also includes an avoidance groove opened on the surface of the support plate, the inner wall of the avoidance groove is fixedly connected to a first spring, the bottom end of the first spring is fixedly connected to a clamp, the surface of the clamp is slidably connected to the inner wall of the avoidance groove, and the surface of the torsion rod is provided with a plug-in groove.

[0012] Preferably, the linkage assembly includes a connecting plate fixedly connected to one side of the support plate, a sleeve fixedly connected to the lower surface of the connecting plate, the surface of the sleeve is slidably connected to the inner wall of the second guide hole, a screw rod is threadedly connected to the inner wall of the connecting plate, the bottom end of the screw rod is rotatably connected to a semi-circular disk, and the semi-circular disk is slidably connected to the inner wall of the sleeve.

[0013] Preferably, the linkage assembly also includes a first spur gear fixedly connected to the surface of the moving shaft, the inner wall of the operating table is rotatably connected to a twisted column, one side of the twisted column is fixedly connected to a second spur gear, and the second spur gear is meshed with the first spur gear.

[0014] Preferably, a placement plate is fixedly connected to one side of the operating table, an electric-driven telescopic rod is fixedly connected to the surface of the placement plate, a push plate is fixedly connected to the output end of the electric-driven telescopic rod, an avoidance hole is opened on the inner bottom wall of the processing groove, and an electric push plate is installed on the inner wall of the avoidance hole.

[0015] In summary, the technical effects and advantages of the present invention are as follows: In the present invention, a processing groove is provided to place the boiler shell to be welded, an electric drive shaft is provided to drive a plurality of friction wheels to rotate, a linkage shaft is provided to drive a plurality of rollers to rotate, and the shell rotates under the action of the friction wheels and the rollers, a first belt is provided so that the first driving wheel drives the linkage shaft to rotate through the first belt, and the rotation of the linkage shaft drives the second driving wheel and the first driven wheel to rotate, a second belt is provided so that the second driving wheel rotates through the second belt to drive the second driven wheel to rotate, and the rotation of the second driven wheel drives the motion shaft to rotate, a friction strip is provided to increase the contact friction between the friction strip and the shell, and the shell is driven to rotate, a front baffle ball and a rear baffle ball are provided to position the shell placed in the processing groove, a connecting block and a slot are provided to cooperate with each other to fix the position of the support plate to prevent the support plate from moving, and a welding head is provided to complete the welding operation on the surface of the shell.

[0016] By setting a sliding sleeve, the sliding sleeve can drive the sliding cylinder to adjust the position of the sliding cylinder, and by setting the sliding cylinder, the rotating shaft connected to the sliding cylinder can be driven to change its position. By setting a sleeve cylinder, the rotation of the rotating shaft is kept stable, and the protective cylinder is supported at the same time. By setting a first metal slider, the first bevel magnetic strip is kept in a stable position after the manual sliding position is maintained. By setting a second bevel gear, the rotation of the first bevel gear can drive the second bevel gear and the rotating shaft to rotate. By setting an eccentric column, the swing plate can be driven to swing, and then the welding head can be swung for welding, simulating manual welding operation. By setting a second metal slider, the second bevel magnetic strip is kept in a stable position after the manual sliding position is maintained. By setting an adjusting column, changing the position of the adjusting column can affect the swing amplitude of the welding head. By setting a first sliding hole, a crescent plate movement avoidance space is given. By setting a crescent plate, the crescent plate is connected to the adjusting column for rotation while realizing the installation support of the swing plate. By setting a through hole, the rotation of the eccentric column can drive the swing plate to swing back and forth through the through hole, so that the welding head can swing for welding, simulating manual welding operation.

[0017] By setting a torsion rod, the petal plate is driven to rotate and adjust the angle. By setting a guide cylinder, the installation support of the positioning block and the resistance column is realized. By setting a friction block, the inner surface of the pot shell base is pressurized so that the friction block moves with the pot shell due to the action of friction. By setting a second spring, the resistance column is driven to move and reset. By setting an avoidance groove, space is given to the first spring and the clamping head to avoid movement. By setting a clamping head and cooperating with the plug-in groove, the petal plate is positioned and fixed after rotating a certain angle. At this time, the surface of the petal plate from the center of the petal plate to the farthest distance is in contact with the surface of the resistance column, pushing the friction block to move in the direction away from the petal plate. The purpose is to make the friction block move with the pot shell due to the action of friction.

[0018] By setting a connecting plate, the sleeve is driven to move together. By setting a screw rod, the height of the semi-circular disk can be rotated to adjust. By setting the semi-circular disk, it cooperates with the twist column to achieve linkage. By setting a second spur gear, when the first spur gear rotates, it drives the second spur gear, and then drives the twist column to rotate. By setting the twist column, when the twist column rotates, the surface of the twist column cooperates with the surface of the semi-circular disk. Under the action of the rotation of the twist column, the semi-circular disk and the sleeve are driven to slide along the direction of the second guide hole, thereby realizing the switching from annular (transverse) welding of the pot shell to horizontal (longitudinal) welding of the pot shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of the present application; Figure 2 This is a schematic diagram of the three-dimensional structure of the electric drive telescopic rod in the embodiment of the present application; Figure 3 This is a schematic diagram of the three-dimensional structure of the guide cylinder in the embodiment of the present application; Figure 4 This is a schematic cross-sectional view of the operating table in the embodiment of the present application; Figure 5 This is a schematic diagram of the three-dimensional structure of the friction wheel in the embodiment of the present application; Figure 6 This is a schematic diagram of the three-dimensional structure of the petal plate in the embodiment of the present application; Figure 7 This is a schematic cross-sectional structural diagram of a sleeve in an embodiment of the present application; Figure 8 For the embodiment of this application Figure 7 A schematic diagram of the enlarged structure at A in the middle; Fig. 9 This is a schematic cross-sectional view of the protective tube in the embodiment of the present application; Fig.10 This is a schematic diagram of the three-dimensional structure of the crescent plate in the embodiment of the present application; Fig.11 It is a schematic diagram of the three-dimensional structure of the twisted column in the embodiment of the present application.

[0021] In the figure: 1, operating table; 2, placing plate; 3, pushing plate; 4, processing groove; 5, second guide hole; 6, first guide hole; 7, electric drive telescopic rod; 8, friction wheel; 9, roller; 10, support plate; 11, connecting plate; 12, sleeve; 13, first driving wheel; 14, first belt; 15, linkage shaft; 16, second driving wheel; 17, first driven wheel; 18, second driven wheel; 19, guide cylinder; 20, petal plate; 21, front ball; 22, first metal slider; 23, sleeve cylinder; 24, protective cylinder; 25, second spring; 26, second belt; 27, friction strip; 28, rear ball; 29, torsion rod; 30, avoidance groove; 31, first spring; 32. Card head; 33. Plug-in slot; 34. Friction block; 35. Retaining column; 36. Positioning block; 37. Screw; 38. Second spur gear; 39. Twist column; 40. Slide; 41. Sleeve; 42. First bevel gear; 43. Second bevel gear; 44. Rotating shaft; 45. First spur gear; 46. First magnetic strip; 47. Electric drive shaft; 48. Semicircular disk; 49. Swing plate; 50. Welding head; 51. Second metal slider; 52. Second magnetic strip; 53. Adjusting column; 54. First sliding hole; 55. Crescent plate; 56. Eccentric column; 57. Through hole; 58. Avoidance hole; 59. Electric drive plate; 60. Connecting block; 61. Card slot; 62. Moving shaft. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example: Reference Figure 1-Figure 11A large-caliber boiler shell plasma welding device shown in the figure comprises an operating table 1, a processing groove 4 is formed on the upper surface of the operating table 1, a first guide hole 6 and a second guide hole 5 are formed on the upper surface of the operating table 1, an electric drive shaft 47 is rotatably connected to the inner wall of the operating table 1, a plurality of friction wheels 8 are fixedly connected to the surface of the electric drive shaft 47, a linkage shaft 15 is rotatably connected to the inner wall of the operating table 1, a plurality of rollers 9 are fixedly connected to the surface of the linkage shaft 15, a plurality of friction wheels 8 and rollers 9 are penetrated and arranged in the inner wall of the processing groove 4, one end of the electric drive shaft 47 penetrates one side of the operating table 1 and is fixedly connected to the first driving wheel 13, one end of the linkage shaft 15 The end passes through one side of the operating table 1, the surface of the linkage shaft 15 is fixedly connected with the second driving wheel 16 and the first driven wheel 17, the surfaces of the first driven wheel 17 and the first driving wheel 13 are sleeved with the same first belt 14, the inner wall of the operating table 1 is rotatably connected with a moving shaft 62, one end of the moving shaft 62 passes through the inner wall of the operating table 1 and is fixedly connected with the second driven wheel 18, the surfaces of the second driven wheel 18 and the second driving wheel 16 are sleeved with the same second belt 26, the surface of the friction wheel 8 is fixedly connected with a plurality of friction strips 27, a welding head 50 is installed above the operating table 1, and the inner wall of the processing groove 4 is fixedly connected with a positioning welding mechanism; The positioning welding mechanism includes a front stopper 21 fixedly connected to the inner wall of the processing groove 4, the inner wall of the processing groove 4 is slidably connected to the support plate 10, the inner wall of the support plate 10 is installed with a rear stopper 28, the rear stopper 28 and the front stopper 21 are used to block the front and rear of the pot shell to be welded, and reduce the friction when the pot shell rotates, one side of the support plate 10 is rotatably connected to a connecting block 60, the inner wall of the processing groove 4 is provided with a slot 61, and the connecting block 60 is adapted to the slot 61; The surface of the moving shaft 62 is slidably connected with a swing welding assembly, the inner wall of the support plate 10 is rotatably connected with a friction clamping assembly, and one side of the support plate 10 is fixedly connected with a linkage assembly.

[0024] By means of the above structure, the processing groove 4 is provided to place the boiler shell to be welded, the electric drive shaft 47 is provided to drive the multiple friction wheels 8 to rotate, and the linkage shaft 15 is provided to drive the multiple rollers 9 to rotate. The shell is rotated under the action of the friction wheels 8 and the rollers 9. The first belt 14 is provided so that the first driving wheel 13 drives the linkage shaft 15 to rotate through the first belt 14. The linkage shaft 15 rotates to drive the second driving wheel 16 and the first driven wheel 17 to rotate. The second belt 26 is provided so that the second driving wheel 13 drives the linkage shaft 15 to rotate. 6 rotates through the second belt 26 to drive the second driven wheel 18 to rotate, and the second driven wheel 18 rotates to drive the moving shaft 62 to rotate. By setting the friction strip 27, the contact friction between the friction strip 27 and the pot shell is increased to drive the pot shell to rotate. By setting the front ball 21 and the rear ball 28, the pot shell placed in the processing groove 4 is positioned. By setting the connecting block 60 and the clamping groove 61, the position of the support plate 10 is fixed to prevent the support plate 10 from moving. By setting the welding head 50, the welding operation on the surface of the pot shell is completed.

[0025] As a preferred implementation in this embodiment, refer to the attached Figure 7 The swing welding assembly includes a sleeve 41 slidably connected to the surface of the moving shaft 62, a sliding groove is provided on the moving shaft, a slider is provided in the sleeve 41, the slider is slidably set in the sliding groove, a first bevel gear 42 is fixedly connected to one side of the sleeve 41, and a slide cylinder 40 is rotatably connected to the surface of the sleeve 41.

[0026] By setting the sliding sleeve 41, when the sliding sleeve 41 maintains its position on the moving shaft 62 unchanged, due to the sliding connection between the sliding sleeve 41 and the moving shaft 62, through the limitation of the sliding groove and the slider, the rotation of the moving shaft 62 can drive the sliding sleeve 41 and the first bevel gear 42 to rotate as a whole; the sliding sleeve 41 slides along the sliding groove through the slider, and the sliding sleeve 41 can drive the slide cylinder 40 to adjust its position. By setting the slide cylinder 40, the rotating shaft 44 connected to the slide cylinder 40 can be driven to change its position. The purpose of sliding the sliding sleeve 41 on the moving shaft 62 to adjust its position is to be able to weld the annular surface of the pot shell at any position.

[0027] As a preferred implementation in this embodiment, refer to the attached Figure 7 The swing welding assembly also includes a first magnetic strip 46 fixedly connected to the inner wall of the first guide hole 6, the surface of the first magnetic strip 46 is slidably connected to the first metal slider 22, the inner wall of the first metal slider 22 is fixedly connected to the sleeve cylinder 23, the inner wall of the sleeve cylinder 23 is rotatably connected to the rotating shaft 44, the bottom end of the rotating shaft 44 passes through the inner wall of the slide cylinder 40 and is fixedly connected to the second bevel gear 43, the second bevel gear 43 is meshed with the first bevel gear 42, and the inner wall of the slide cylinder 40 is rotatably connected to the surface of the rotating shaft 44.

[0028] By setting the sleeve cylinder 23, the rotation of the rotating shaft 44 is kept stable and the protective cylinder 24 is supported at the same time. By setting the first metal slider 22, the first metal slider 22 is manually slid to a position and keeps the first magnetic strip 46 in a stable position. By setting the second bevel gear 43, the rotation of the first bevel gear 42 can drive the second bevel gear 43 and the rotating shaft 44 to rotate.

[0029] As a preferred implementation in this embodiment, refer to the attached Figure 7 , Fig. 9 The swing welding assembly also includes a protective tube 24 fixedly connected to the top of the sleeve tube 23, an eccentric column 56 is fixedly connected to the top of the rotating shaft 44, and the eccentric column 56 is eccentrically arranged with the central axis of the rotating shaft 44. The inner wall of the protective tube 24 is fixedly connected to a second magnetic strip 52, and the inner wall of the second magnetic strip 52 is slidably connected to a second metal slider 51, and the inner wall of the second metal slider 51 is rotatably connected to an adjusting column 53.

[0030] By setting the eccentric column 56, the swing plate 49 can be driven to swing, and then the welding head 50 can swing to weld, simulating manual welding operation. By setting the second metal slider 51, after the manual sliding position, the second magnetic strip 52 can maintain a stable positioning. By setting the adjustment column 53, changing the position of the adjustment column 53 can affect the change of the swing amplitude of the welding head 50.

[0031] As a preferred implementation in this embodiment, refer to the attached Fig. 9 , Fig.10 The swing welding assembly also includes a swing plate 49 installed inside the protective tube 24, a first sliding hole 54 is opened on the upper surface of the swing plate 49, a crescent plate 55 is slidably connected to the inner wall of the first sliding hole 54, a pair of opposite surfaces of the crescent plates 55 are rotatably connected to the surface of the adjusting column 53, the inner wall of the swing plate 49 is fixedly connected to the surface of the welding head 50, and the swing welding assembly also includes a through hole 57 opened on the upper surface of the swing plate 49, and the eccentric column 56 is installed inside the through hole 57.

[0032] By setting the first sliding hole 54, a space is provided for the crescent plate 55 to move around. By setting the crescent plate 55, the crescent plate 55 is rotatably connected with the adjusting column 53, and the installation support for the swing plate 49 is realized. By setting the through hole 57, the eccentric column 56 can rotate and drive the swing plate 49 to swing back and forth through the through hole 57.

[0033] As a preferred implementation in this embodiment, refer to the attached Figure 6The friction clamping assembly includes a torsion rod 29 rotatably connected to the inner wall of the support plate 10, one end of the torsion rod 29 is fixedly connected to the petal plate 20, one side of the support plate 10 is fixedly connected to the guide cylinder 19, the inner wall of the guide cylinder 19 is slidably connected to a positioning block 36, the inner wall of the positioning block 36 is fixedly connected to a resisting column 35, one end of the resisting column 35 passes through the surface of the guide cylinder 19 and is fixedly connected to a friction block 34, the surface of the resisting column 35 is sleeved with a second spring 25, one end of the second spring 25 is fixedly connected to the surface of the positioning block 36, and the other end of the second spring 25 is fixedly connected to the inner surface of the guide cylinder 19.

[0034] By setting a torsion rod 29, the petal plate 20 is driven to rotate and adjust the angle. By setting a guide cylinder 19, the installation support of the positioning block 36 and the resistance column 35 is realized. By setting a friction block 34, the inner surface of the pot shell base is pressurized so that the friction block 34 moves and drives the pot shell to move together under the action of friction force. By setting a second spring 25, the resistance column 35 is driven to move and reset.

[0035] As a preferred implementation in this embodiment, refer to the attached Figure 6 The friction clamping assembly also includes an avoidance groove 30 opened on the surface of the support plate 10, the inner wall of the avoidance groove 30 is fixedly connected with a first spring 31, the bottom end of the first spring 31 is fixedly connected with a clamping head 32, the surface of the clamping head 32 is slidably connected to the inner wall of the avoidance groove 30, and the surface of the torsion rod 29 is provided with a plug-in groove 33.

[0036] By setting the avoidance groove 30, space is given to the first spring 31 and the clamping head 32 to move around. By setting the clamping head 32 and cooperating with the plug-in groove 33, the petal plate 20 can be positioned and fixed after being rotated to a certain angle. At this time, the surface of the petal plate 20 from the center to the farthest distance contacts the surface of the resisting column 35, pushing the friction block 34 to move in the direction away from the petal plate 20.

[0037] As a preferred implementation in this embodiment, refer to the attached Figure 7 , Figure 8 The linkage assembly includes a connecting plate 11 fixedly connected to one side of the support plate 10, a sleeve 12 is fixedly connected to the lower surface of the connecting plate 11, the surface of the sleeve 12 is slidably connected to the inner wall of the second guide hole 5, a screw rod 37 is threadedly connected to the inner wall of the connecting plate 11, and a semi-circular disk 48 is rotatably connected to the bottom end of the screw rod 37, and the semi-circular disk 48 is slidably connected to the inner wall of the sleeve 12.

[0038] By setting the connecting plate 11, the sleeve 12 is driven to move together, and by setting the screw rod 37, the height of the semi-circular disk 48 can be rotated to adjust the height. By setting the semi-circular disk 48, it cooperates with the twisted column 39 to achieve linkage.

[0039] As a preferred implementation in this embodiment, refer to the attached Figure 8 , Fig.11 The linkage assembly also includes a first spur gear 45 fixedly connected to the surface of the moving shaft 62, and the inner wall of the operating table 1 is rotatably connected to a twisted column 39, and one side of the twisted column 39 is fixedly connected to a second spur gear 38, and the second spur gear 38 is meshed with the first spur gear 45.

[0040] By setting the second spur gear 38, when the first spur gear 45 rotates, it drives the second spur gear 38 to rotate, and then drives the twisted column 39 to rotate. By setting the twisted column 39, when the twisted column 39 rotates, the surface of the twisted column 39 cooperates with the surface of the semi-circular disk 48. Under the action of the rotation of the twisted column 39, the semi-circular disk 48 and the sleeve 12 are driven to slide along the direction of the second guide hole 5.

[0041] As a preferred implementation in this embodiment, refer to the attached Figure 1 , Figure 2 , Figure 3 A placement plate 2 is fixedly connected to one side of the operating table 1, an electric drive telescopic rod 7 is fixedly connected to the surface of the placement plate 2, a push plate 3 is fixedly connected to the output end of the electric drive telescopic rod 7, an avoidance hole 58 is opened on the inner bottom wall of the processing groove 4, and an electric push plate 59 is installed on the inner wall of the avoidance hole 58.

[0042] By providing an electrically driven telescopic rod 7 , the push plate 3 is pushed to send the pot shell into the processing groove 4 , and by providing an electrically driven push plate 59 , the welded pot shell can be pushed out of the processing groove 4 .

[0043] The working principle of the present invention is: a large-caliber boiler shell plasma welding device, before welding, the push plate 3 is pushed by the electric drive telescopic rod 7 to send the shell into the processing groove 4, so that the front ball 21 and the rear ball 28 are used to position the shell placed in the processing groove 4. At this time, the connecting block 60 is located in the card slot 61, and the support plate 10 is fixed. After the position of the second metal slider 51 is manually slid, the positioning is kept stable with the second iron-absorbing magnetic strip 52. At this time, the position of the welding head 50 is exactly at the position where welding is required, and the electric drive shaft 47 is started. The electric drive shaft 47 drives multiple friction wheels 8 and the first driving wheel 13 to rotate. By setting the first belt 14, the first driving wheel 13 drives the linkage shaft 15 to rotate through the first belt 14, and the linkage shaft 15 rotates The second driving wheel 16, the first driven wheel 17 and the plurality of rollers 9 are driven to rotate. The pot shell is driven to rotate under the action of the friction wheel 8, the roller 9 and the friction strip 27 to realize rotation during welding. During the welding process of the welding head 50, the second driving wheel 16 rotates to drive the second driven wheel 18 to rotate through the second belt 26. The second driven wheel 18 rotates to drive the moving shaft 62 to rotate. The moving shaft 62 rotates the sliding sleeve 41 and the first bevel gear 42. The first bevel gear 42 drives the second bevel gear 43 and the rotating shaft 44 to rotate. The rotating shaft 44 rotates to drive the eccentric column 56 to rotate. The eccentric column 56 can drive the swing plate 49 to swing, thereby making the welding head 50 swing and weld, simulating the manual welding operation. At this time, under the rotation of the pot shell, the annular welding of the pot shell is completed. Welding, when horizontal longitudinal welding is required, first stop the electric drive shaft 47, rotate the connecting block 60 to remove it from the slot 61, operate the rotating torsion rod 29, so that the torsion rod 29 drives the petal plate 20 to rotate a certain angle, so that the plug-in slot 33 is engaged with the clamping head 32, and the petal plate 20 is rotated a certain angle and then positioned and fixed. At this time, the surface of the petal plate 20 from the center to the farthest distance contacts the surface of the resisting column 35, and the friction block 34 is pushed to move the friction block 34 in the direction away from the petal plate 20. Multiple friction blocks 34 are pressurized on the inner surface of the pot shell base, so that the friction block 34 moves with the pot shell under the action of friction force, and then the screw rod 37 is rotated to drive the semi-circular disk 48 to descend, so that the surface of the semi-circular disk 48 is in contact with the surface of the resisting column 35. The surface of the twist column 39 closest to the center contacts, and then the electric drive shaft 47 is started to rotate the moving shaft 62. The rotation of the moving shaft 62 will cause the welding head 50 to continue swinging and welding, and at the same time drive the first spur gear 45 located on the surface of the moving shaft 62 to rotate, and the rotation of the first spur gear 45 drives the second spur gear 38 to rotate, and the rotation of the second spur gear 38 drives the twist column 39 to rotate. Under the action of the rotation of the twist column 39, the semi-circular disk 48 and the sleeve 12 are driven to slide along the direction of the second guide hole 5, and then the connected connecting plate 11 and the support plate 10 and the multiple friction blocks 34 frictionally clamped pot shell move horizontally, and the pot shell is horizontally welded. In this process, the friction force of the friction block 34 overcomes the rotation force of the friction wheel 8, so that the pot shell does not rotate when it is horizontal.When the swing angle of the welding head 50 needs to be adjusted, the position of the second metal slider 51 can be manually adjusted. With the above structure, when welding, there is no need to manually hold the equipment for welding, and it is far away from the welding environment. The shell can be welded horizontally and horizontally, which is safe and labor-saving.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A large-caliber boiler shell plasma welding device, comprising an operating table (1), characterized in that: The upper surface of the operating table (1) is provided with a processing groove (4), the upper surface of the operating table (1) is provided with a first guide hole (6) and a second guide hole (5), the inner wall of the operating table (1) is rotatably connected to an electric drive shaft (47), the surface of the electric drive shaft (47) is fixedly connected to a plurality of friction wheels (8), the inner wall of the operating table (1) is rotatably connected to a linkage shaft (15), the surface of the linkage shaft (15) is fixedly connected to a plurality of rollers (9), the plurality of friction wheels (8) and rollers (9) are arranged through the inner wall of the processing groove (4), one end of the electric drive shaft (47) passes through one side of the operating table (1) and is fixedly connected to a first driving wheel (13), one end of the linkage shaft (15) passes through one side of the operating table (1), The surface of the linkage shaft (15) is fixedly connected to a second driving wheel (16) and a first driven wheel (17); the surfaces of the first driven wheel (17) and the first driving wheel (13) are sleeved with a first belt (14); the inner wall of the operating table (1) is rotatably connected to a moving shaft (62); one end of the moving shaft (62) passes through the inner wall of the operating table (1) and is fixedly connected to a second driven wheel (18); the surfaces of the second driven wheel (18) and the second driving wheel (16) are sleeved with a second belt (26); the surface of the friction wheel (8) is fixedly connected to a plurality of friction strips (27); a welding head (50) is installed above the operating table (1); and a positioning welding mechanism is fixedly connected to the inner wall of the processing groove (4); The positioning welding mechanism comprises a front stopper ball (21) fixedly connected to the inner wall of the processing groove (4); the inner wall of the processing groove (4) is slidably connected to a support plate (10); the inner wall of the support plate (10) is provided with a rear stopper ball (28); the rear stopper ball (28) and the front stopper ball (21) are used to block the front and rear of a pot shell to be welded and reduce friction when the pot shell rotates; one side of the support plate (10) is rotatably connected to a connecting block (60); the inner wall of the processing groove (4) is provided with a clamping groove (61); the connecting block (60) is adapted to the clamping groove (61); The surface of the moving shaft (62) is slidably connected to a swing welding assembly, the inner wall of the support plate (10) is rotatably connected to a friction clamping assembly, and one side of the support plate (10) is fixedly connected to a linkage assembly.

2. A large-caliber boiler shell plasma welding device according to claim 1, characterized in that: The swing welding assembly comprises a sliding sleeve (41) slidably connected to the surface of a moving shaft (62), a first bevel gear (42) being fixedly connected to one side of the sliding sleeve (41), and a sliding cylinder (40) being rotatably connected to the surface of the sliding sleeve (41).

3. A large-caliber boiler shell plasma welding device according to claim 2, characterized in that: The swing welding assembly also includes a first magnetic strip (46) fixedly connected to the inner wall of the first guide hole (6); the surface of the first magnetic strip (46) is slidably connected to the first metal slider (22); the inner wall of the first metal slider (22) is fixedly connected to the sleeve cylinder (23); the inner wall of the sleeve cylinder (23) is rotatably connected to the rotating shaft (44); the bottom end of the rotating shaft (44) passes through the inner wall of the slide cylinder (40) and is fixedly connected to the second bevel gear (43); the second bevel gear (43) is meshed with the first bevel gear (42); the inner wall of the slide cylinder (40) is rotatably connected to the surface of the rotating shaft (44).

4. A large-caliber boiler shell plasma welding device according to claim 3, characterized in that: The swing welding assembly also includes a protective tube (24) fixedly connected to the top of the sleeve tube (23); an eccentric column (56) is fixedly connected to the top of the rotating shaft (44); the eccentric column (56) is eccentrically arranged with respect to the central axis of the rotating shaft (44); a second magnetic strip (52) is fixedly connected to the inner wall of the protective tube (24); a second metal slider (51) is slidably connected to the inner wall of the second magnetic strip (52); and an adjustment column (53) is rotatably connected to the inner wall of the second metal slider (51).

5. A large-caliber boiler shell plasma welding device according to claim 4, characterized in that: The swing welding assembly also includes a swing plate (49) installed inside the protective tube (24), the upper surface of the swing plate (49) is provided with a first sliding hole (54), the inner wall of the first sliding hole (54) is slidably connected to a crescent plate (55), a pair of opposite surfaces of the crescent plates (55) are rotatably connected to the surface of the adjustment column (53), the inner wall of the swing plate (49) is fixedly connected to the surface of the welding head (50), and the swing welding assembly also includes a through hole (57) opened on the upper surface of the swing plate (49), and the eccentric column (56) is installed inside the through hole (57).

6. The large-caliber boiler shell plasma welding device according to claim 1 is characterized in that: The friction clamping assembly comprises a torsion rod (29) rotatably connected to the inner wall of the support plate (10), one end of the torsion rod (29) is fixedly connected to the petal plate (20), one side of the support plate (10) is fixedly connected to the guide cylinder (19), the inner wall of the guide cylinder (19) is slidably connected to a positioning block (36), the inner wall of the positioning block (36) is fixedly connected to a stop column (35), one end of the stop column (35) penetrates the surface of the guide cylinder (19) and is fixedly connected to the friction block (34), the surface of the stop column (35) is sleeved with a second spring (25), one end of the second spring (25) is fixedly connected to the surface of the positioning block (36), and the other end of the second spring (25) is fixedly connected to the inner surface of the guide cylinder (19).

7. A large-caliber boiler shell plasma welding device according to claim 6, characterized in that: The friction clamping assembly further comprises an avoidance groove (30) formed on the surface of the support plate (10); a first spring (31) is fixedly connected to the inner wall of the avoidance groove (30); a clamping head (32) is fixedly connected to the bottom end of the first spring (31); a surface of the clamping head (32) is slidably connected to the inner wall of the avoidance groove (30); and a plug-in groove (33) is formed on the surface of the torsion rod (29).

8. The large-caliber boiler shell plasma welding device according to claim 1 is characterized in that: The linkage assembly comprises a connecting plate (11) fixedly connected to one side of the support plate (10); a sleeve (12) is fixedly connected to the lower surface of the connecting plate (11); a surface of the sleeve (12) is slidably connected to the inner wall of the second guide hole (5); a screw rod (37) is threadedly connected to the inner wall of the connecting plate (11); a semi-circular disk (48) is rotatably connected to the bottom end of the screw rod (37); and the semi-circular disk (48) is slidably connected to the inner wall of the sleeve (12).

9. A large-caliber boiler shell plasma welding device according to claim 8, characterized in that: The linkage assembly further comprises a first spur gear (45) fixedly connected to the surface of the moving shaft (62); a twisted column (39) is rotatably connected to the inner wall of the operating table (1); a second spur gear (38) is fixedly connected to one side of the twisted column (39); the second spur gear (38) meshes with the first spur gear (45).

10. The large-caliber boiler shell plasma welding device according to claim 1, characterized in that: A placement plate (2) is fixedly connected to one side of the operating table (1), an electric drive telescopic rod (7) is fixedly connected to the surface of the placement plate (2), an output end of the electric drive telescopic rod (7) is fixedly connected to a push plate (3), an avoidance hole (58) is provided on the inner bottom wall of the processing groove (4), and an electric push plate (59) is installed on the inner wall of the avoidance hole (58).

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