Full-automatic welding machine for pipeline flange plate

Abstract

The invention discloses a pipeline flange plate full-automatic welding machine, which relates to the technical field of pipe fitting welding, and comprises a feeding ramp, a welding platform and a discharging ramp which are sequentially arranged from front to back along the moving direction of a pipeline, and further comprises a first welding frame I, a second welding frame II, a third welding frame I and a fourth welding frame II, the first welding frame II is connected to the edge of the right front end of the top of the welding platform in a sliding manner and is opposite to the first welding frame I; the side walls, close to each other, of the first welding frame I and the first welding frame II are rotationally connected with three-jaw chucks which are vertically and oppositely arranged. The second welding frame I is in sliding connection with the edge of the left rear end of the top of the welding platform; according to the invention, double-disc fixation is stable and vibration-free, the procedure of spot welding first is omitted, the outer ring of the pipeline is welded first, then the inner ring is welded to avoid welding deformation, welding equipment is arranged in a staggered manner to facilitate replacement and maintenance, a complex adjusting mechanism is not needed, and the welding efficiency and the finished product quality of the pipeline flange plate are improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipe fitting welding, in particular to a pipeline flange full-automatic welding machine. Background Art

[0002] Pipe flange welding is a process of connecting flanges to pipes. A flange is a disc-shaped part that is widely used in pipeline engineering. It usually has bolt holes for connecting with other flanges or pipe fittings to form a pipeline system. Welding is the process of forming a permanent connection between separate flanges and pipes by applying heat, pressure, or both. Figure 8 As shown, when the existing pipeline is welded to the flange, two welding guns are needed to weld the outer ring and the inner ring of the pipeline respectively.

[0003] Application number 202310651038.4, application date 2023.06.02, application publication number CN116890178A; application publication date 2023.10.17; discloses a document named "Pipe loading and unloading device, straight pipe flange welding system and straight pipe flange welding method", which realizes the loading and unloading of the straight pipe flange by "moving the position of the conveying rod and the blocking member, making the loading and unloading and welding actions of the straight pipe flange simpler and more compact, reducing the welding action time and control difficulty", however, the conveying rod and the blocking member have complex structures, and the three-axis servo slide 33 continuously adjusts the welding gun position as needed, which is cumbersome and difficult to operate, and the welding efficiency is low.

[0004] Application No. 201010542088.1, application date 2010.11.13, authorization announcement No. CN102000921B, authorization announcement date 2012.08.22, discloses a document entitled "A flange welding method and welding device", which "adjusts the position of the steel pipe along the track direction, the horizontal and vertical directions of the track, and the height direction through an automatic adjustment bracket, so that the steel pipe and the flange are accurately connected;" however, it is necessary to "after the connection is completed, spot weld the flange first, and then remove the automatic adjustment bracket", the operation steps are cumbersome and the welding efficiency is low.

[0005] In view of this, this application is hereby filed. Summary of the invention

[0006] The object of the present invention is to provide a pipeline flange fully automatic welding machine to solve the problems of complicated operation and low efficiency of existing pipeline flange welding mentioned in the above background technology.

[0007] In order to solve the above technical problems, the present invention provides a pipeline flange fully automatic welding machine, including a loading ramp, a welding platform and a unloading ramp arranged in sequence from front to back along the moving direction of the pipeline, and also includes: a first welding frame 1: fixed at the edge of the left front end of the top of the welding platform; a first welding frame 2: slidingly connected to the edge of the right front end of the top of the welding platform, and arranged opposite to the first welding frame 1; the side walls of the first welding frame 1 and the first welding frame 2 close to each other are rotatably connected with vertical and oppositely arranged three-jaw chucks; a second welding frame 1: slidingly connected to the edge of the left rear end of the top of the welding platform; a second welding frame 2: slidingly connected to the edge of the right rear end of the top of the welding platform, and arranged opposite to the second welding frame 1; a double-roller support frame 1: the number is three, and the three double-roller support frames Support frame 1 is arranged at equal intervals between the first welding frame 1 and the first welding frame 2, and the pipeline is rotatably connected to the top of the double-roller support frame 1, and the double-roller support frame 1 drives the pipeline to move toward the first welding frame 1; Double-roller support frame 2: There are three in number, and the three double-roller support frames 1 are arranged at equal intervals between the first welding frame 1 and the first welding frame 2; one of the ends of the double-roller support frames 2 is engaged with a drive chain 1, which provides a power source for the welding and rotation of the pipeline on the top of the double-roller support frame 1; Cylinder 2: There are two in number, which are arranged between two adjacent double-roller support frames 1; Cylinder 2 moves the pipeline from the double-roller support frame 1 to the double-roller support frame 2; Cylinder 3: There are two in number, which are arranged between two adjacent double-roller support frames 2; Cylinder 3 moves the pipeline from the double-roller support frame 2 to the unloading ramp.

[0008] Furthermore, a vertical mounting plate is fixed between the loading ramp and the welding platform, and a cylinder 1 is fixed to the inner wall of the vertical mounting plate, and the cylinder 1 moves the pipeline from the loading ramp to a double-roller support frame; the outer wall of the vertical mounting plate is rotatably connected to a vertically arranged cylinder 4, and the top of the cylinder 4 is rotatably connected to an inclined rotating frame, and the middle part of the rotating frame is rotatably connected to the outer wall of the vertical mounting plate through a rotating shaft, and the top of the rotating frame away from the loading ramp is an L-shaped structure; in the process of moving the pipeline from the loading ramp to the double-roller support frame 1, the pipeline moves to the end of the rotating frame away from the loading ramp, the extension end of the cylinder 4 works, the rotating frame rotates, the pipeline moves down to the top of the double-roller support frame 1, and the pipeline is separated from the rotating frame.

[0009] The cam is connected with the first welding frame through the bottom wall of the bottom plate, and the cam is connected with the first welding frame through the cam.

[0010] Furthermore, a variable frequency motor for driving the three-jaw chuck to rotate is fixed to the side wall of the first welding frame 1 away from the three-jaw chuck, an inverted L-shaped bracket 1 is fixed to the top of the side wall where the first welding frame 1 and the first welding frame 2 are close to each other, a cylinder 7 is fixed to the top of the bracket 1, a carrier plate is fixed to the output end of the cylinder 7, a guide rail is provided on the vertically arranged side wall of the bracket 1, the guide rail limits the movement of the carrier plate in the vertical direction, and an outer ring welding gun is fixed to the bottom of the carrier plate.

[0011] Furthermore, the second welding frame 1 and the second welding frame 2 have the same mounting components, a cylinder 5 fixed to the top of the welding platform is installed on one side wall of the second welding frame 1, and an inner ring welding gun is fixed on the side wall of the second welding frame 1 away from the cylinder 5.

[0012] Furthermore, a bracket 2 is fixed to a side of the second welding frame 1 away from the first welding frame 1, a cylinder 6 located directly above the double-roller support frame 2 is fixed to the top of one end of the bracket 2, and a double-roller pressure wheel is fixed to the output end of the bracket 2. When the pipeline moves to the top of the double-roller support frame 2 for welding, two rotating rollers at the bottom of the double-roller pressure wheel abut against both sides of the top of the pipeline and are rotatably connected thereto; the axial displacement of the pipeline caused by the axial runout is reduced, so that the welding of the pipeline and the inner ring weld of the flange plate runs smoothly, thereby improving the welding accuracy between the pipeline and the flange plate and improving the quality of the finished product.

[0013] Furthermore, the loading ramp includes a frame arranged toward the welding platform, and a vertical limit plate is embedded in the side wall of the frame close to the first welding frame. A push plate is slidably connected in the vertical limit plate and moves toward the other side wall of the frame. A hydraulic cylinder 2 is fixed on the loading ramp to drive the push plate to move horizontally; the push plate moves the pipeline in the frame toward the first welding frame, and one end of the pipeline is close to the side wall of the frame; so that during welding, the end face of the flange and the end face of the pipeline are located in the same vertical plane, thereby reducing the welding error of the flange and the pipeline and improving the quality of the finished product.

[0014] Furthermore, a guide seat 1 is fixed on the top of the welding platform and is arranged obliquely on the top. The unloading ramp includes a guide seat 2 and a baffle plate which are arranged obliquely on the top thereof. The lowest end of the horizontal plane of the bottom of the guide seat 1 and the highest end of the horizontal plane of the top of the guide seat 2 are located at the same level. The baffle plate is fixed to the end of the guide seat 2 away from the guide seat 1, and a buffer pad is fixed to the side wall of the baffle plate close to the guide seat 2, which is convenient for unloading and transportation of the pipeline flange after welding is completed.

[0015] Furthermore, a storage channel is opened on the top of the welding platform, and the bottom of the driving chain 1 that drives the double-roller support frame 2 passes through the storage channel and engages with a power source located inside the welding platform; the stability of the welding between the pipeline and the inner ring of the flange is improved; a guide frame is fixed on the top of the welding platform, which is installed between the double-roller support frame 1 and the double-roller support frame 2 and is located on the same side of the double-roller support frame 1 and the double-roller support frame 2; the pipeline is stable during the process of moving from the double-roller support frame 1 to the double-roller support frame 2, so that the pipeline can rotate smoothly when the pipeline is welded on the top of the double-roller support frame 2.

[0016] Furthermore, it also includes a distribution box, a control box, a welding machine housing, a wire feeder, a sensor, a lifting loading conveyor belt and a lifting unloading conveyor belt; the distribution box provides a power source, the control box controls the opening and closing of components, the welding machine housing and the wire feeder both cooperate with the welding gun, and the sensor is a laser sensor, which detects whether there is a workpiece at the welding station to determine whether the workpiece at the station is working, and can also detect a cycle from the start to the end of the weld.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Through the precisely designed double roller support frame 1 and double roller support frame 2, combined with the precise movement of the cylinder, the pipeline is ensured to be stably and accurately positioned during the welding process, reducing the axial displacement caused by the axial runout of the pipeline, thereby improving the welding accuracy between the pipeline and the flange and the quality of the finished product;

[0019] 2. The double-station design is adopted, that is, the first welding frame 1 and the first welding frame 2, the second welding frame 1 and the second welding frame 2 are responsible for the welding of the outer ring and the inner ring of the pipeline respectively, realizing simultaneous operation and significantly improving the welding efficiency, and increasing the welding speed from 30 pieces per day for manual welding to one piece per minute for automatic welding; through the design of the automatic loading and unloading system and the guide seat, the operation process is simplified and the production cycle is shortened;

[0020] 3. The design of the positive and negative thread screw on the double roller support frame allows the distance between the two rotating rollers to be adjusted to adapt to pipelines of different diameters, thus enhancing the applicable scope of the equipment. The device has a compact structure and is easy to operate. The connection and layout design between the various components are reasonable, which is convenient for replacement, maintenance and daily operation.

[0021] 4. The design of the pneumatic layout not only simplifies the equipment structure, but also helps to improve operational safety and reduce the risks that may be caused by complex mechanical structures. The setting of guide seat 1 and guide seat 2, as well as the configuration of the lifting loading conveyor belt and the lifting unloading conveyor belt, make it easy to transfer the pipe flange after welding to the next process, and also facilitate the maintenance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view of a pipeline flange fully automatic welding machine;

[0023] Figure 2 It is a rear view of a pipeline flange fully automatic welding machine;

[0024] Figure 3 This is a schematic diagram of the positions of the assembly parts on the top of the welding platform in a pipeline flange fully automatic welding machine;

[0025] Figure 4 It is a structural schematic diagram of a double-roller support frame 1 in a pipeline flange automatic welding machine;

[0026] Figure 5 A schematic diagram of the positional relationship between a first welding frame 1 and a second welding frame 1 in a pipeline flange fully automatic welding machine;

[0027] Figure 6 It is a structural schematic diagram of a loading ramp in a pipeline flange fully automatic welding machine;

[0028] Figure 7 This is a structural schematic diagram of a material discharge ramp in a pipeline flange fully automatic welding machine;

[0029] Figure 8 This is a schematic diagram of the positional relationship between two welding guns and two welds when welding an existing pipeline to a flange.

[0030] In the figure:

[0031] 10. Loading ramp; 11. Vertical mounting plate; 12. Enclosure frame; 13. Vertical limit plate; 14. Push plate; 15. Hydraulic cylinder 2;

[0032] 20. Welding platform; 21. Guide seat 1;

[0033] 30. Unloading ramp; 31. Guide seat 2;

[0034] 40. First welding frame 1; 41. Three-jaw chuck; 42. Frequency conversion motor; 43. Bracket 1; 44. Cylinder 7; 45. Loading plate;

[0035] 50. First welding frame two;

[0036] 60. Second welding frame 1; 61. Cylinder 5; 62. Bracket 2; 63. Cylinder 6; 64. Double roller pressure wheel;

[0037] 70. Second welding frame 2;

[0038] 80. Double roller support frame 1; 81. Double roller support frame 2; 82. Bottom plate; 83. Transverse plate; 84. Transverse guide tube; 85. Hydraulic cylinder 1; 86. Sliding block; 87. Roller mounting plate; 88. Positive and negative thread screw; 89. Turning handle;

[0039] 90. Cylinder one; 91. Cylinder two; 92. Cylinder three; 93. Guide frame; 94. Rotating frame; 95. Cylinder four. DETAILED DESCRIPTION

[0040] 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.

[0041] See also Figure 1-8The present invention provides a technical solution: a pipeline flange fully automatic welding machine, comprising a loading ramp 10, a welding platform 20 and a unloading ramp 30 arranged in sequence from front to back along the moving direction of the pipeline, and also comprising: a first welding frame 40: fixed at the edge of the left front end of the top of the welding platform 20; a first welding frame 50: slidably connected to the edge of the right front end of the top of the welding platform 20, and arranged opposite to the first welding frame 40; the side walls of the first welding frame 40 and the first welding frame 50 close to each other are rotatably connected with a vertical and relatively arranged three-jaw chuck 41; a second welding frame 60: slidably connected to the edge of the left rear end of the top of the welding platform 20; a second welding frame 70: slidably connected to the edge of the right rear end of the top of the welding platform 20, and arranged opposite to the second welding frame 60; a double-roller support frame 80: the number is three, and the three double-roller support frames 80 are equidistantly arranged between the first welding frame 40 and the first welding frame 50, and the pipeline is rotatably connected to the double-roller support Frame 1 80 top; double-roller support frame 2 81: there are three in number, and three double-roller support frames 80 are arranged at equal intervals between the first welding frame 1 40 and the first welding frame 2 50; the end of one of the double-roller support frames 2 81 is engaged with a driving chain 1; it provides a power source for the double-roller support frame 80 top pipeline welding rotation; cylinder 2 91: there are two in number, which are arranged between two adjacent double-roller support frames 80; cylinder three 92: there are two in number, which are arranged between two adjacent double-roller support frames 2 81; a vertical mounting plate 11 is fixed between the loading ramp 10 and the welding platform 20, and a cylinder 1 90 is fixed to the inner side wall of the vertical mounting plate 11; the outer side wall of the vertical mounting plate 11 is rotatably connected to a vertically arranged cylinder four 95, and the top of the cylinder four 95 is rotatably connected to an inclined rotating frame 94, and the middle part of the rotating frame 94 is rotatably connected to the outer side wall of the vertical mounting plate 11 through a rotating shaft, and the top of the rotating frame 94 away from the loading ramp 10 is an L-shaped structure.

[0042] It should be noted here that: the pipeline to be welded is located at the loading ramp 10, the flange is fixed on the three-jaw chuck 41, and the extension end of the cylinder 1 90 moves up so that its top pipeline moves out of the loading ramp 10 and moves toward the double-roller support frame 1 80. During this process, the extension end of the cylinder 4 95 moves up, the rotating frame 94 rotates, and the pipeline moves to the end of the rotating frame 94 away from the loading ramp 10, and the pipeline moves down to the top of the double-roller support frame 1 80, and the pipeline is separated from the rotating frame 94; the axial displacement caused by the axial runout of the pipeline is reduced, thereby improving the welding accuracy between the pipeline and the flange and improving the quality of the finished product, and the double-roller support frame 1 80 drives the pipeline to move toward the first welding frame 1 40; the outer ring of the pipeline is welded; the cylinder 2 91 moves the pipeline from the double-roller support frame 1 80 to the double-roller support frame 2 81; the inner ring of the pipeline is welded; the cylinder 3 92 moves the pipeline from the double-roller support frame 2 81 to the unloading ramp 30; it is convenient for unloading of finished products.

[0043] A pipeline flange fully automatic welding machine, a double-roller support frame 80 includes a bottom plate 82 fixed to the top of the welding platform 20, the top of the bottom plate 82 is slidably connected to a transverse plate 83 moving toward a first welding frame 40 through a transverse guide tube 84, one side inner wall of the transverse plate 83 is penetrated and rotatably connected with a positive and negative threaded screw 88 arranged along the pipeline transmission direction, one end of the positive and negative threaded screw 88 is fixed with a rotating handle 89, the middle part of the outer wall of both ends of the positive and negative threaded screw 88 is threadedly connected with a slider 86 slidably connected to the top of the transverse plate 83, both side walls of the slider 86 are fixed with roller mounting plates 87 slidably connected to the top of the transverse plate 83, and a rotating roller is rotatably connected between the two oppositely arranged roller mounting plates 87; the two rotating rollers abut against the two sides of the bottom of the pipeline and are rotatably connected thereto; a horizontally arranged hydraulic cylinder 85 is fixed at the center of the top edge of the bottom plate 82, and the output end of the hydraulic cylinder 85 is fixed with a connecting block welded to the bottom of the transverse plate 83.

[0044] It should be noted here that: by rotating the rotating handle 89 and the forward and reverse threaded screw 88, the two sliders 86 and the rotating rollers on their tops are moved closer to or farther away from each other, so that the axis lines of pipelines with different diameters, the axis line of the three-jaw chuck 41 and the axis line of the flange on the three-jaw chuck 41 coincide with each other, thereby improving the application range of the device; the hydraulic cylinder 85 drives the transverse plate 83 so that the rotating roller on its top drives the pipeline to move toward the first welding frame 40, so that the end of the pipeline and the end of the flange are located in the same vertical plane, thereby improving the welding accuracy and the quality of the finished product.

[0045] A pipeline flange fully automatic welding machine, a first welding frame 40 is fixed with a frequency conversion motor 42 for driving the three-jaw chuck 41 to rotate on the side wall away from the three-jaw chuck 41, an inverted L-shaped bracket 43 is fixed to the top of the side wall where the first welding frame 40 and the first welding frame 50 are close to each other, a cylinder 7 44 is fixed to the top of the bracket 43, a carrier plate 45 is fixed to the output end of the cylinder 7 44, a guide rail is provided on the vertically arranged side wall of the bracket 43, the guide rail limits the movement of the carrier plate 45 in the vertical direction, and an outer ring welding gun is fixed to the bottom of the carrier plate 45; the second welding frame 60 and the second welding frame 70 have the same mounting components, a cylinder 5 61 fixed to the top of the welding platform 20 is installed on one side wall of the second welding frame 60, and an inner ring welding gun is fixed to the side wall of the second welding frame 60 away from the cylinder 5 61.

[0046] It should be noted here that welding gun 1 and welding gun 2 are as follows: Figure 8As shown, the cylinder 5 61 drives the second welding frame 1 60 to move toward the double roller support frame 2 81, the first welding frame 2 50 and the transverse plate 83 both move toward the first welding frame 1 40, the two flanges and the two ends of the pipeline are aligned, and after the welding of the two welding guns at the first welding gun station and the outer rings of the two ends of the pipeline are welded, the first welding frame 2 50 and the transverse plate 83 are reset, and the two welding guns weld the inner rings of the two ends of the pipeline, and the double stations weld the outer ring and the inner ring of the pipeline at the same time, which improves the welding efficiency. The welding efficiency is increased from 30 pieces per day for manual welding to one piece per minute for automatic welding.

[0047] A pipeline flange fully automatic welding machine, a second welding frame 60 is fixed with a bracket 62 on one side away from the first welding frame 40, a cylinder 63 located just above a double-roller support frame 81 is fixed to the top of one end of the bracket 62, a double-roller pressure wheel 64 is fixed to the output end of the bracket 62, when the pipeline moves to the top of the double-roller support frame 81 for welding, the two rotating rollers at the bottom of the double-roller pressure wheel 64 abut against the two sides of the top of the pipeline and are rotatably connected thereto; a storage channel is opened on the top of the welding platform 20, and a driving chain 1 that drives the double-roller support frame 81 passes through the storage channel at the bottom and engages with a power source located inside the welding platform 20; a guide frame 93 installed between the double-roller support frame 80 and the double-roller support frame 81 and located on the same side of the double-roller support frame 80 and the double-roller support frame 81 is fixed to the top of the welding platform 20; so that the pipeline is stable during the process of the double-roller support frame 80 moving to the double-roller support frame 81.

[0048] It should be noted here that: the drive chain 1 provides power for the rotation of the pipeline, and the setting of the double-roller pressure wheel 64 improves the stability of the welding between the pipeline and the inner ring of the flange, so that when the pipeline is welded on the top of the double-roller support frame 81, the pipeline can rotate smoothly, and the axial displacement caused by the axial runout of the pipeline can be reduced, so that the welding seam between the pipeline and the inner ring of the flange can run smoothly, thereby improving the welding accuracy between the pipeline and the flange and improving the quality of the finished product.

[0049] A fully automatic welding machine for pipeline flanges, a loading ramp 10 includes a frame 12 arranged toward a welding platform 20, a side wall of the frame 12 close to a first welding frame 50 is embedded with a vertical limit plate 13, a push plate 14 is slidably connected inside the vertical limit plate 13 and moves toward the other side wall of the frame 12, a hydraulic cylinder 15 is fixed on the loading ramp 10 to drive the push plate 14 to move horizontally; the push plate 14 moves the pipeline in the frame 12 toward the first welding frame 40, and one end of the pipeline is close to the side wall of the frame 12.

[0050] It should be noted here that the setting of the push plate 14 enables the pipeline to move to a preset position, so that during subsequent welding, the flange end face and the pipeline end face are located in the same vertical plane, reducing the welding error between the flange and the pipeline and improving the quality of the finished product.

[0051] A fully automatic welding machine for pipeline flanges, a guide seat 21 with an inclined top fixed on the top of a welding platform 20, a material discharge ramp 30 including a guide seat 21 and a baffle plate located at the top thereof and inclined, the lowest end of the horizontal plane of the bottom of the guide seat 21 and the highest end of the horizontal plane of the top of the guide seat 21 are located at the same level, the baffle plate is fixed to the end of the guide seat 21 away from the guide seat 21, and a buffer pad is fixed to the side wall of the baffle plate close to the guide seat 21.

[0052] It should be noted here that the arrangement of the guide seat 1 21 and the guide seat 2 31 facilitates the unloading and transportation of the pipeline flange after welding.

[0053] A pipeline flange full-automatic welding machine also includes a distribution box, a control box, a welding machine box, a wire feeder, a sensor, a lifting type feeding conveyor belt and a lifting type unloading conveyor belt.

[0054] It should be noted here that: the distribution box provides the power source, the control box controls the opening and closing of the components, the welding machine box and the wire feeder work together with the welding gun, the sensor is a laser sensor, which detects whether there is a workpiece at the welding station to determine whether the workpiece at the station is working, and can also detect the start and end of a weld cycle. The connection relationship of the above components and their use methods are all well-known technical means in the field and will not be repeated in this article.

[0055] At the same time, the technical means adopted in this application document do not require complex adjustment mechanisms for the pipeline, and do not require the use of complex adjustment mechanisms for the welding gun. The double-station design can weld the outer ring and inner ring of the pipeline at the same time, which improves the welding efficiency. The device has a compact structure and simple operation. The double disc is fixed stably without vibration, which eliminates the process of spot welding first. The outer ring of the pipeline is welded first, and then the inner ring is welded to avoid welding deformation. The staggered layout of the welding equipment is convenient for replacement and maintenance; the structure is simple and easy to operate, and it can realize full-process operation as well as single-process operation; the pneumatic layout is conducive to safety.

Claims

1. A pipeline flange fully automatic welding machine, comprising a loading ramp (10), a welding platform (20) and a unloading ramp (30) arranged in sequence from front to back along the moving direction of the pipeline, characterized in that: Also includes: A first welding frame (40) is fixed to the edge of the left front end of the top of the welding platform (20); The first welding frame 2 (50) is slidably connected to the edge of the right front end of the top of the welding platform (20) and is arranged opposite to the first welding frame 1 (40); the side walls of the first welding frame 1 (40) and the first welding frame 2 (50) close to each other are both rotatably connected to a vertical and oppositely arranged three-jaw chuck (41); A second welding frame (60) is slidably connected to the edge of the left rear end of the top of the welding platform (20); Second welding frame 2 (70): slidably connected to the edge of the right rear end of the top of the welding platform (20), and arranged opposite to the second welding frame 1 (60); Double roller support frame one (80): There are three of them, and the three double roller support frames one (80) are arranged at equal intervals between the first welding frame one (40) and the first welding frame two (50). The pipeline is rotatably connected to the top of the double roller support frame one (80), and the double roller support frame one (80) drives the pipeline to move toward the first welding frame one (40); Double roller support frame 2 (81): There are three of them, and the three double roller support frames 1 (80) are arranged at equal intervals between the first welding frame 1 (40) and the first welding frame 2 (50); the end of one of the double roller support frames 2 (81) is engaged with a driving chain 1; Cylinder 2 (91): There are two cylinders, which are arranged between two adjacent double roller support frames 1 (80); Cylinder 2 (91) moves the pipeline from double roller support frame 1 (80) to double roller support frame 2 (81); Cylinder three (92): There are two cylinders, which are arranged between two adjacent double roller support frames (81); cylinder three (92) moves the pipeline from the double roller support frame (81) to the unloading ramp (30).

2. A pipeline flange fully automatic welding machine as claimed in claim 1, characterized in that: A vertical mounting plate (11) is fixed between the loading ramp (10) and the welding platform (20), and a cylinder one (90) is fixed to the inner wall of the vertical mounting plate (11), and the cylinder one (90) enables the pipeline to move from the loading ramp (10) to the double roller support frame one (80); the outer wall of the vertical mounting plate (11) is rotatably connected to a vertically arranged cylinder four (95), and the top of the cylinder four (95) is rotatably connected to an inclined rotating frame (94), and the middle part of the rotating frame (94) is rotatably connected to the outer wall of the vertical mounting plate (11) through a rotating shaft, and the top of the rotating frame (94) at one end away from the loading ramp (10) is in an L-shaped structure.

3. The pipeline flange fully automatic welding machine according to claim 1, characterized in that: The double roller support frame (80) comprises a bottom plate (82) fixed to the top of the welding platform (20); the top of the bottom plate (82) is slidably connected to a transverse plate (83) moving toward the first welding frame (40) through a transverse guide tube (84); a forward and reverse threaded screw (88) arranged along the pipeline transmission direction is penetrated and rotatably connected through the inner wall of one side of the transverse plate (83); a rotating handle (89) is fixed to one end of the forward and reverse threaded screw (88); and the middle parts of the outer walls of both ends of the forward and reverse threaded screw (88) are threadedly connected to the sliding connection. A slider (86) is disposed on the top of the transverse plate (83), and roller mounting plates (87) slidably connected to the top of the transverse plate (83) are fixed on both side walls of the slider (86), and a rotating roller is rotatably connected between the two roller mounting plates (87) arranged opposite to each other; the two rotating rollers abut against the two sides of the bottom of the pipeline and are rotatably connected thereto; a horizontally arranged hydraulic cylinder (85) is fixed at the center of the top edge of the bottom plate (82), and a connecting block welded to the bottom of the transverse plate (83) is fixed to the output end of the hydraulic cylinder (85).

4. The pipeline flange fully automatic welding machine according to claim 1, characterized in that: A variable frequency motor (42) for driving the three-jaw chuck (41) to rotate is fixed to the side wall of the first welding frame (40) away from the three-jaw chuck (41), and an inverted L-shaped bracket (43) is fixed to the top of the side wall of the first welding frame (40) and the first welding frame (50) close to each other, a cylinder (44) is fixed to the top of the bracket (43), and a carrier plate (45) is fixed to the output end of the cylinder (44), and a guide rail is provided on the vertically arranged side wall of the bracket (43), and the guide rail limits the movement of the carrier plate (45) in the vertical direction, and an outer ring welding gun is fixed to the bottom of the carrier plate (45).

5. The pipeline flange fully automatic welding machine according to claim 1, characterized in that: The second welding frame one (60) and the second welding frame two (70) have the same mounting components. A cylinder five (61) fixed to the top of the welding platform (20) is installed on one side wall of the second welding frame one (60). The cylinder five (61) drives the second welding frame one (60) to move toward the double-roller support frame two (81). An inner ring welding gun is fixed on the side wall of the second welding frame one (60) away from the cylinder five (61).

6. The pipeline flange fully automatic welding machine according to claim 1, characterized in that: A bracket 2 (62) is fixed to the side of the second welding frame 1 (60) away from the first welding frame 1 (40); a cylinder 6 (63) located directly above the double-roller support frame 2 (81) is fixed to the top of one end of the bracket 2 (62); a double-roller pressure wheel (64) is fixed to the output end of the bracket 2 (62); when the pipeline moves to the top of the double-roller support frame 2 (81) for welding, the two rotating rollers at the bottom of the double-roller pressure wheel (64) abut against the two sides of the top of the pipeline and are rotatably connected thereto.

7. The pipeline flange fully automatic welding machine according to claim 1, characterized in that: The loading ramp (10) comprises a frame (12) arranged toward the welding platform (20), a side wall of the frame (12) close to the first welding frame (50) is embedded with a vertical limit plate (13), a push plate (14) is slidably connected inside the vertical limit plate (13) and moves toward the other side wall of the frame (12), and a hydraulic cylinder (15) is fixed on the loading ramp (10) to drive the push plate (14) to move horizontally; the push plate (14) causes the pipeline in the frame (12) to move toward the first welding frame (40), and one end of the pipeline is close to the side wall of the frame (12).

8. The pipeline flange fully automatic welding machine according to claim 1, characterized in that: A guide seat 1 (21) is fixed on the top of the welding platform (20), and the unloading ramp (30) includes a guide seat 2 (31) and a baffle plate located on the top of the welding platform (20). The lowest end of the horizontal plane of the bottom of the guide seat 1 (21) and the highest end of the horizontal plane of the top of the guide seat 2 (31) are located at the same level. The baffle plate is fixed to the end of the guide seat 2 (31) away from the guide seat 1 (21), and a buffer pad is fixed to the side wall of the baffle plate close to the guide seat 2 (31).

9. The pipeline flange fully automatic welding machine according to claim 1, characterized in that: A storage channel is provided on the top of the welding platform (20); a driving chain 1 for driving the double roller support frame 2 (81) passes through the storage channel at the bottom and engages with a power source located inside the welding platform (20); a guide rail frame (93) is fixed on the top of the welding platform (20) and is installed between the double roller support frame 1 (80) and the double roller support frame 2 (81) and is located on the same side of the double roller support frame 1 (80) and the double roller support frame 2 (81).

10. A pipeline flange fully automatic welding machine according to any one of claims 1 to 9, characterized in that: It also includes a distribution box, a control box, a welding machine box, a wire feeder, a sensor, a lifting type loading conveyor belt and a lifting type unloading conveyor belt.

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