A welding device for steel pipe processing

Abstract

The present invention relates to the technical field of steel pipe welding, and proposes a welding device for steel pipe processing, including a welding frame, a welding positioning and conveying mechanism, a pipe fitting positioning and driving mechanism, and a welding mechanism with a position adjustment and pre-welding detection function. There are two welding positioning and conveying mechanisms, and the two welding positioning and conveying mechanisms are symmetrically arranged on the welding frame. A welding cavity is formed between the two welding positioning and conveying mechanisms. There are two pipe fitting positioning and driving mechanisms, and the pipe fitting positioning and driving mechanisms are arranged on the welding frame. A synchronous driving assembly is arranged between the two pipe fitting positioning and driving mechanisms. The pipe fitting positioning and driving mechanisms correspond to the welding positioning and conveying mechanisms one by one, and the pipe fitting positioning and driving mechanisms are located on the side of the welding positioning and conveying mechanism away from the welding cavity. Through the above technical solution, the problem that the existing welding device for steel pipe processing has low welding precision and cannot perform ideal welding when welding steel pipes with different diameters is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe welding, and specifically, to a welding device for steel pipe processing. Background Art

[0002] A welding device for steel pipe processing is a device used to connect and splice steel pipes through welding operations. Generally, it consists of a welding head group, a track conveying system, a control system, and a power supply system. The pipeline to be welded is conveyed and docked through the track conveying system, and then the rotating welding head group performs welding operations on the weld position of the pipeline, thereby completing the welding operation of the steel pipe.

[0003] However, in the existing steel pipe welding devices, during the welding process of steel pipes, most of them complete the welding of steel pipes by rotating the welding head group. However, in the actual welding process, driving the welding head group to rotate through power equipment not only easily causes high-frequency vibration to drive the welding head to vibrate, resulting in errors in welding accuracy and welding strength, but also the welding process is mostly divided into multiple segments, and it is easy to appear the phenomenon of welding gaps during the welding process. Moreover, the positioning mechanisms of some welding devices are difficult to ensure that the steel pipes are always in a stable state, and it is difficult to accurately position steel pipes with different diameters, resulting in the problem that the connection between steel pipes cannot achieve an ideal welding effect. Summary of the Invention

[0004] The present invention proposes a welding device for steel pipe processing to solve the problems in the background art that in the existing welding devices for steel pipe processing, when welding steel pipes with different diameters, there are problems of low welding accuracy and inability to achieve ideal welding.

[0005] The technical solution of the present invention is as follows: A welding device for steel pipe processing includes a welding frame, a welding positioning and conveying mechanism, a pipe fitting positioning and driving mechanism, and a welding mechanism with a position adjustment and pre-welding detection function;

[0006] There are two welding positioning and conveying mechanisms, and the two welding positioning and conveying mechanisms are symmetrically arranged on the welding frame. A welding cavity is formed between the two welding positioning and conveying mechanisms;

[0007] There are two pipe fitting positioning and driving mechanisms. The pipe fitting positioning and driving mechanisms are arranged on the welding frame. A synchronous driving component is arranged between the two pipe fitting positioning and driving mechanisms. The pipe fitting positioning and driving mechanisms correspond to the welding positioning and conveying mechanisms one by one. The pipe fitting positioning and driving mechanisms are located on the side of the welding positioning and conveying mechanisms away from the welding cavity, and are used to position the steel pipes to be welded and drive the steel pipes to be welded to rotate at the same time;

[0008] The welding mechanism is arranged on the welding frame, and the welding mechanism is located within the welding cavity for welding the steel pipes to be welded.

[0009] As a preferred technical solution of the present application, the welding positioning and conveying mechanism includes a positioning and conveying frame, a conveying component with an axis positioning function, and an axis positioning component with a self-locking function;

[0010] The positioning and conveying frame is arranged on the welding frame;

[0011] The conveying component is slidably arranged on the positioning and conveying frame for driving the movement of the steel pipe;

[0012] The axis positioning component is arranged on the positioning and conveying frame, and the axis positioning component is connected to the conveying component for driving the movement of the conveying component.

[0013] On the basis of the foregoing solution, further, the conveying component includes an upper conveying plate, a lower conveying plate, and a conveying motor;

[0014] There are two upper conveying plates, and the upper conveying plates are slidably arranged on the positioning and conveying frame. A plurality of upper conveying rollers are rotatably arranged between the two upper conveying plates;

[0015] There are two lower conveying plates, and the lower conveying plates are slidably arranged on the positioning and conveying frame. The lower conveying plates correspond to the upper conveying plates one by one. A plurality of lower conveying rollers are rotatably arranged between the two lower conveying plates. The lower conveying rollers correspond to the upper conveying rollers one by one, and a conveying cavity is formed between the lower conveying rollers and the upper conveying rollers;

[0016] The conveying motor is installed on one side of one of the lower conveying plates, and the output end of the conveying motor is connected to one end of one of the lower conveying rollers.

[0017] On the basis of the foregoing solution, further, the axis positioning component includes a bidirectional positioning screw rod and a positioning power part with a self-locking function;

[0018] There are two bidirectional positioning screw rods, and the bidirectional positioning screw rods penetrate and are rotatably arranged on the positioning and conveying frame. The bidirectional positioning screw rods correspond to the upper conveying plates and the lower conveying plates one by one. Two ball nut groups are threadedly connected to the bidirectional positioning screw rods, and the two ball nut groups are respectively connected to the corresponding upper conveying plates and lower conveying plates;

[0019] The positioning power part is arranged on the positioning and conveying frame, and the positioning power part is connected to the bidirectional positioning screw rod.

[0020] On the basis of the foregoing solution, further, the positioning power part includes a power box, a power rotating rod, a first bevel gear, a second bevel gear, a power worm gear, a power worm, a power motor and a gear protection box;

[0021] The power box is arranged on the positioning conveyor frame;

[0022] The power rotating rod penetrates through and is rotatably arranged on the power box;

[0023] There are two first bevel gears, and the first bevel gears are arranged on the power rotating rod;

[0024] There are two second bevel gears, the second bevel gears correspond to the bidirectional positioning lead screws one by one, the second bevel gears are arranged on the bidirectional positioning lead screws, the second bevel gears correspond to the first bevel gears one by one, and the second bevel gears are meshed with the first bevel gears;

[0025] The power worm gear is arranged on the power rotating rod;

[0026] The power worm is rotatably arranged in the power box, and the power worm is meshed with the power worm gear;

[0027] The power motor is installed on one side of the power box, and the output end of the power motor is connected to one end of the power worm;

[0028] There are two gear protection boxes, the gear protection boxes correspond to the second bevel gears one by one, the gear protection boxes are arranged on the positioning conveyor frame, and both the second bevel gear and the first bevel gear are located in the gear protection boxes.

[0029] As a preferred technical solution of the present application, the pipe fitting positioning driving mechanism includes a top limiting frame, a bottom limiting box, a hollow positioning ring, an air supply pump, an air suction pump and a pneumatic telescopic positioning assembly;

[0030] The top limiting frame is arranged on the welding frame;

[0031] The bottom limiting box is arranged on the welding frame;

[0032] The hollow positioning ring is rotatably arranged between the top limiting frame and the bottom limiting box;

[0033] The air supply pump is installed on the hollow positioning ring, and the air supply end of the air supply pump is communicated with the hollow positioning ring;

[0034] The air suction pump is installed on the hollow positioning ring, and the air suction end of the air suction pump is communicated with the hollow positioning ring;

[0035] There are two pneumatic telescopic positioning components, and the two pneumatic telescopic positioning components are symmetrically and communicatively arranged in the hollow positioning ring, and a positioning cavity is formed between the two pneumatic telescopic positioning components.

[0036] On the basis of the foregoing solution, further, the pneumatic telescopic positioning component includes a positioning cylinder, an arc-shaped positioning box and a positioning rod;

[0037] One end of the positioning cylinder is communicatively arranged on the hollow positioning ring, and the other end of the positioning cylinder penetrates and is hermetically slidably provided with a positioning tube;

[0038] The arc-shaped positioning box is communicatively arranged on the side of the positioning tube away from the positioning cylinder;

[0039] There are multiple positioning rods, and the positioning rods penetrate and are hermetically slidably arranged on the side of the arc-shaped positioning box away from the positioning tube for clamping and fixing the steel pipe.

[0040] On the basis of the foregoing solution, further, the synchronous drive component includes a drive gear ring, a drive rotating rod, a drive gear and a drive motor;

[0041] There are two drive gear rings, the drive gear rings correspond to the hollow positioning rings one by one, and the drive gear rings are sleeved on the hollow positioning rings;

[0042] The drive rotating rod penetrates and is rotatably arranged between the two bottom limiting boxes;

[0043] There are two drive gears, the drive gears are arranged on the drive rotating rod, the drive gears correspond to the drive gear rings one by one, and the drive gears are meshed with the drive gear rings;

[0044] The drive motor is installed on one side of one of the bottom limiting boxes, and the output end of the drive motor is connected to one end of the drive rotating rod.

[0045] On the basis of the foregoing solution, the welding mechanism includes a welding slide plate, a transverse positioning cylinder, a longitudinal positioning cylinder, a longitudinal adjustment pressure sensor, a welding head frame, a welding gun head group and a pre-welding position detection component;

[0046] The welding slide plate is slidably arranged on the welding frame;

[0047] The transverse positioning cylinder is installed on the welding frame, and the output end of the transverse positioning cylinder is connected to one end of the welding slide plate;

[0048] The longitudinal positioning cylinder is installed on the welding slide plate;

[0049] The longitudinal adjustment pressure sensor is installed on the output end of the longitudinal positioning cylinder;

[0050] The welding head frame is arranged on the detection end of the longitudinal adjustment pressure sensor;

[0051] The welding gun head group is installed on the welding head frame and is used for welding the steel pipe;

[0052] There are two pre-weld welding position detection assemblies, which are symmetrically arranged on both sides of the welding head frame and are used to detect the weld track of the steel pipe to be welded.

[0053] Further on the basis of the above scheme, the pre-welding welding position detection assembly includes a welding position spring damper, a welding position pressure sensor and a welding position detection head;

[0054] One end of the welding position spring shock absorber is arranged on the welding head frame;

[0055] The welding position pressure sensor is installed at the other end of the welding position spring shock absorber;

[0056] The welding position detection head is arranged on the detection end of the welding position pressure sensor.

[0057] Further on the basis of the above scheme, two feed rollers are rotatably arranged on the welding frame, and the feed rollers correspond one-to-one to the pipe positioning drive mechanism. The feed rollers are located on one side of the welding positioning and conveying mechanism of the pipe positioning drive mechanism, and are used to support the pipes to be welded for loading and conveying.

[0058] The working principle and beneficial effects of the present invention are:

[0059] 1. The present invention, when two steel pipes to be welded are butt-jointed and conveyed, under the support of the feed roller, the welding ends of the steel pipes are respectively moved into the welding positioning and conveying mechanisms through the two pipe positioning drive mechanisms, and then the two power motors are started synchronously, the output end of the power motor drives the power worm to rotate, the rotation of the power worm drives the power worm wheel to rotate, the rotation of the power worm wheel drives the power rotating rod to rotate, the rotation of the power rotating rod drives the bevel gear 1 to rotate, the rotation of the bevel gear 1 drives the bevel gear 2 to rotate, the rotation of the bevel gear 2 drives the bidirectional positioning screw to rotate, so that the two ball nut groups on the bidirectional positioning screw move relative to each other, and the movement of the ball nut group drives the upper conveying plate and the lower conveying plate to move relative to each other, so that the multiple upper conveying rollers and the multiple lower conveying rollers move relative to each other, and the steel pipe to be welded is clamped by the movement of the upper conveying roller and the lower conveying roller, and then the conveying motor is started, and the lower conveying roller connected to the conveying motor is driven to rotate by the output end of the conveying motor, and the steel pipe to be welded can be conveyed and adjusted under the rotation of the lower conveying roller;

[0060] 2. In the present invention, before welding the steel pipe, by rotating the power motor, the welding end of the steel pipe to be welded is moved below the corresponding welding position detection head. Then, the air supply pump is started, and the external gas is pumped into the hollow positioning ring by the air supply pump. As the air pressure in the hollow positioning ring increases, the positioning pipe moves towards one side of the steel pipe. At the same time, as the air pressure in the hollow positioning ring increases, the gas enters the arc-shaped positioning box, and the positioning rods in the arc-shaped positioning box also move towards one side of the steel pipe until they are in contact with the steel pipe, clamping and fixing the steel pipe. After the positioning rods squeeze and fix the steel pipe, the power motor is started to separate the lower conveying roller and the upper conveying roller from the steel pipe. Then, the driving motor is started, and the output end of the driving motor drives the driving rotating rod to rotate. The rotation of the driving rotating rod drives the driving gear to rotate, and the rotation of the driving gear drives the driving gear ring to rotate. The rotation of the driving gear ring drives the hollow positioning ring to perform a circular motion. By the rotation of the hollow positioning ring, the steel pipe can be driven to perform a 360° circular motion. When the hollow positioning ring drives the steel pipe to rotate, the longitudinal adjustment cylinder is started, and the output end of the longitudinal adjustment cylinder drives the longitudinal adjustment pressure sensor to move. The movement of the longitudinal adjustment pressure sensor drives the welding head frame to move, and the movement of the welding head frame drives the welding position spring shock absorber, the welding position pressure sensor, and the welding position detection head to move, so that one end of the welding position detection head is squeezed and touched with the welding position of the steel pipe. As the steel pipe rotates, by the change of the value of the welding position pressure sensor, the roundness of the weld position of the steel pipe can be detected to ensure that there will be no excessive error after the weld positions of the two steel pipes are butted;

[0061] 3. In the present invention, after detecting the roundness of the weld position of the steel pipe, by starting the positioning motor, the lower conveying roller and the upper conveying roller re-clamp and position the steel pipe. Then, by starting the suction pump, the gas in the hollow positioning ring is pumped out to separate the positioning rods from the steel pipe. By starting the conveying motor, the weld positions of the two steel pipes are butted below the welding gun head group. Then, by starting the air supply pump again, the positioning rods clamp the steel pipe. By starting the power motor, the lower conveying roller and the upper conveying roller are separated from the steel pipe. Then, by starting the driving motor and the longitudinal adjustment cylinder, the roundness of the edge of the steel pipe weld is detected by the welding position detection head. When the roundness meets the standard, it can be proved that the welds of the two steel pipes are aligned. Then, by starting the longitudinal adjustment cylinder, the welding gun head group is brought into contact with the weld position, and a one-time complete welding operation can be performed on the steel pipe;

[0062] 4. In the present invention, when welding a steel pipe with a shorter length, by driving the steel pipe to rotate, compared with the rotation of the traditional welding gun head group, during the welding process, the welding gun head group is not only more stable, but also a pre-welding circular simulation motion can be performed on the steel pipe before welding, so that the quality of the steel pipe can be detected, and at the same time, the quality of the weld after welding can be ensured, improving the welding accuracy;

[0063] 5. In the present invention, when welding steel pipes with a relatively short length, the traditional clamping and positioning mechanism with unidirectional movement is abandoned. Through the cooperation of the upper conveying rollers and the lower conveying rollers with bidirectional movement, and the cooperation with two arc-shaped positioning boxes moving relatively to each other, when welding steel pipes with different diameters, the axes of the two steel pipes can always be positioned at the center of the conveying cavity. When welding two steel pipes with relatively low requirements for welding accuracy, the positions of the welds of the two steel pipes can be directly butted by rotating the conveying motor. The steel pipes are rotated by the driving motor, and the edge of the weld of the steel pipe is detected before welding by the welding position detection head, and then the weld is welded by the welding gun head group. During the actual welding process, when there is a deviation in the position of the welding gun head group and the weld, the transverse adjustment cylinder can be started, and the output end of the transverse adjustment cylinder drives the welding slide plate to move, and the position of the welding gun head group can be finely adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0065] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0066] Figure 2 is a schematic structural diagram of a partial cross-section of the welding positioning and conveying mechanism in the present invention;

[0067] Figure 3 In the present invention Figure 2 is a schematic diagram of a partial enlarged structure at A in the present invention;

[0068] Figure 4 is a schematic structural diagram of a partial cross-section of the pipe fitting positioning and driving mechanism in the present invention;

[0069] Figure 5 In the present invention Figure 4 is a schematic diagram of a partial enlarged structure at B in the present invention;

[0070] Figure 6 is a schematic structural diagram of the synchronous driving assembly in the present invention;

[0071] Figure 7 is a schematic structural diagram of the welding mechanism in the present invention;

[0072] Figure 8 In the present invention Figure 7 is a schematic diagram of a partial enlarged structure at C in the present invention.

[0073] The reference numerals in the drawings respectively represent: 001, welding positioning and conveying mechanism; 002, pipe fitting positioning and driving mechanism; 003, welding mechanism;

[0074] 1. Welding frame; 2. Positioning and conveying frame; 3. Upper conveying plate; 4. Upper conveying roller; 5. Lower conveying plate; 6. Lower conveying roller; 7. Conveying motor; 8. Bidirectional positioning lead screw; 9. Ball nut group; 10. Power box; 11. Power rotating rod; 12. First bevel gear; 13. Second bevel gear; 14. Power worm gear; 15. Power worm; 16. Power motor; 17. Gear protection box; 18. Top limit frame; 19. Bottom limit box; 20. Hollow positioning ring; 21. Air supply pump; 22. Suction pump; 23. Positioning cylinder; 24. Positioning pipe; 25. Arc-shaped positioning box; 26. Positioning rod; 27. Driving gear ring; 28. Driving rotating rod; 29. Driving gear; 30. Driving motor; 31. Welding slide plate; 32. Transverse positioning cylinder; 33. Longitudinal positioning cylinder; 34. Longitudinal adjustment pressure sensor; 35. Welding head frame; 36. Welding gun head group; 37. Welding position spring shock absorber; 38. Welding position pressure sensor; 39. Welding position detection head. Detailed implementation manners

[0075] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of the present invention.

[0076] As Figures 1 to 8 shown, this embodiment provides a welding device for steel pipe processing, including a welding frame 1, a welding positioning and conveying mechanism 001, a pipe fitting positioning and driving mechanism 002, and a welding mechanism 003 with positioning adjustment and pre-welding detection functions.

[0077] As described above, there are two welding positioning and conveying mechanisms 001, and the two welding positioning and conveying mechanisms 001 are symmetrically arranged on the welding frame 1. A welding cavity is formed between the two welding positioning and conveying mechanisms 001. The welding positioning and conveying mechanism 001 includes a positioning and conveying frame 2, a conveying component with an axis positioning function, and an axis positioning component with a self-locking function. The positioning and conveying frame 2 is arranged on the welding frame 1. The conveying component is slidably arranged on the positioning and conveying frame 2 and is used to drive the steel pipe to move. The axis positioning component is arranged on the positioning and conveying frame 2 and is connected to the conveying component to drive the conveying component to move.

[0078] Among them, the conveying assembly includes an upper conveying plate 3, a lower conveying plate 5 and a conveying motor 7. There are two upper conveying plates 3, and the upper conveying plates 3 are slidably arranged on the positioning conveying frame 2. A plurality of upper conveying rollers 4 are rotatably arranged between the two upper conveying plates 3. There are two lower conveying plates 5, and the lower conveying plates 5 are slidably arranged on the positioning conveying frame 2. The lower conveying plates 5 correspond to the upper conveying plates 3 one by one. A plurality of lower conveying rollers 6 are rotatably arranged between the two lower conveying plates 5. The lower conveying rollers 6 correspond to the upper conveying rollers 4 one by one. A conveying cavity is formed between the lower conveying rollers 6 and the upper conveying rollers 4. The conveying motor 7 is installed on one side of one of the lower conveying plates 5, and the output end of the conveying motor 7 is connected to one end of one of the lower conveying rollers 6;

[0079] Among them, the axis positioning assembly includes a bidirectional positioning screw rod 8 and a positioning power part with a self-locking function. There are two bidirectional positioning screw rods 8. The bidirectional positioning screw rods 8 penetrate and are rotatably arranged on the positioning conveying frame 2. The bidirectional positioning screw rods 8 correspond to the upper conveying plates 3 and the lower conveying plates 5 one by one. Two ball nut groups 9 are threadedly connected to the bidirectional positioning screw rods 8. The two ball nut groups 9 are respectively connected to the corresponding upper conveying plates 3 and lower conveying plates 5. The positioning power part is arranged on the positioning conveying frame 2 and is connected to the bidirectional positioning screw rod 8. The positioning power part includes a power box 10, a power rotating rod 11, a first bevel gear 12, a second bevel gear 13, a power worm gear 14, a power worm 15, a power motor 16 and a gear protection box 17. The power box 10 is arranged on the positioning conveying frame 2. The power rotating rod 11 penetrates and is rotatably arranged on the power box 10. There are two first bevel gears 12, and the first bevel gears 12 are arranged on the power rotating rod 11. There are two second bevel gears 13, and the second bevel gears 13 correspond to the bidirectional positioning screw rods 8 one by one. The second bevel gears 13 are arranged on the bidirectional positioning screw rods 8. The second bevel gears 13 correspond to the first bevel gears 12 one by one, and the second bevel gears 13 are meshed with the first bevel gears 12. The power worm gear 14 is arranged on the power rotating rod 11. The power worm 15 is rotatably arranged in the power box 10. The power worm 15 is meshed with the power worm gear 14. The power motor 16 is installed on one side of the power box 10, and the output end of the power motor 16 is connected to one end of the power worm 15. There are two gear protection boxes 17, and the gear protection boxes 17 correspond to the second bevel gears 13 one by one. The gear protection boxes 17 are arranged on the positioning conveying frame 2. The second bevel gears 13 and the first bevel gears 12 are both located in the gear protection boxes 17.

[0080] Among them, two feeding rollers are also rotatably arranged on the welding frame 1. The feeding rollers correspond to the pipe fitting positioning driving mechanism 002 one by one. The feeding rollers are located on one side of the pipe fitting positioning driving mechanism 002 away from the welding positioning conveying mechanism 001 and are used to support the pipe fittings to be welded for feeding and conveying.

[0081] Specifically, when butt - welding two steel pipes to be welded and conveying them in a butting manner, supported by the feeding rollers, the welding ends of the steel pipes are respectively moved into the welding positioning and conveying mechanism 001 through the two pipe - fitting positioning and driving mechanisms 002. Then, two power motors 16 are started synchronously. The output end of the power motor 16 drives the power worm 15 to rotate. The rotation of the power worm 15 drives the power worm gear 14 to rotate. The rotation of the power worm gear 14 drives the power rotating rod 11 to rotate. The rotation of the power rotating rod 11 drives the first bevel gear 12 to rotate. The rotation of the first bevel gear 12 drives the second bevel gear 13 to rotate. The rotation of the second bevel gear 13 drives the bidirectional positioning lead screw 8 to rotate, causing the two ball nut groups 9 on the bidirectional positioning lead screw 8 to move relatively. Through the movement of the ball nut groups 9, the upper conveying plate 3 and the lower conveying plate 5 move relatively, so that a plurality of upper conveying rollers 4 and a plurality of lower conveying rollers 6 move relatively. The steel pipes to be welded are clamped through the movement of the upper conveying rollers 4 and the lower conveying rollers 6. Then, the conveying motor 7 is started, and the output end of the conveying motor 7 drives the connected lower conveying rollers 6 to rotate. Under the rotation of the lower conveying rollers 6, the steel pipes to be welded can be conveyed and positioned.

[0082] As described above, there are two pipe - fitting positioning and driving mechanisms 002. The pipe - fitting positioning and driving mechanisms 002 are arranged on the welding frame 1. A synchronous driving component is arranged between the two pipe - fitting positioning and driving mechanisms 002. The pipe - fitting positioning and driving mechanisms 002 and the welding positioning and conveying mechanism 001 are in one - to - one correspondence. The pipe - fitting positioning and driving mechanisms 002 are located on the side of the welding positioning and conveying mechanism 001 away from the welding cavity, used to position the steel pipes to be welded and drive the steel pipes to be welded to rotate simultaneously.

[0083] Among them, the pipe - fitting positioning and driving mechanism 002 includes a top limiting frame 18, a bottom limiting box 19, a hollow positioning ring 20, an air supply pump 21, an air suction pump 22 and a pneumatic telescopic positioning component. The top limiting frame 18 is arranged on the welding frame 1. The bottom limiting box 19 is arranged on the welding frame 1. The hollow positioning ring 20 is rotatably arranged between the top limiting frame 18 and the bottom limiting box 19. The air supply pump 21 is installed on the hollow positioning ring 20, and the air - output end of the air supply pump 21 is communicated with the hollow positioning ring 20. The air suction pump 22 is installed on the hollow positioning ring 20, and the air - input end of the air suction pump 22 is communicated with the hollow positioning ring 20. There are two pneumatic telescopic positioning components, and the two pneumatic telescopic positioning components are symmetrically and communicatively arranged in the hollow positioning ring 20, and a positioning cavity is formed between the two pneumatic telescopic positioning components.

[0084] Among them, the pneumatic telescopic positioning assembly includes a positioning cylinder 23, an arc-shaped positioning box 25 and a positioning rod 26. One end of the positioning cylinder 23 is connected and arranged on the hollow positioning ring 20. The other end of the positioning cylinder 23 penetrates and is hermetically slidably provided with a positioning pipe 24. The arc-shaped positioning box 25 is connected and arranged on the side of the positioning pipe 24 away from the positioning cylinder 23. There are multiple positioning rods 26. The positioning rods 26 penetrate and are hermetically slidably arranged on the side of the arc-shaped positioning box 25 away from the positioning pipe 24, and are used for clamping and fixing the steel pipe.

[0085] Among them, the step driving assembly includes a driving gear ring 27, a driving rotating rod 28, a driving gear 29 and a driving motor 30. There are two driving gear rings 27, and the driving gear rings 27 correspond to the hollow positioning ring 20 one by one. The driving gear rings 27 are sleeved on the hollow positioning ring 20. The driving rotating rod 28 penetrates and is rotatably arranged between the two bottom limiting boxes 19. There are two driving gears 29. The driving gears 29 are arranged on the driving rotating rod 28. The driving gears 29 correspond to the driving gear rings 27 one by one. The driving gears 29 are meshed with the driving gear rings 27. The driving motor 30 is installed on one side of one of the bottom limiting boxes 19. The output end of the driving motor 30 is connected to one end of the driving rotating rod 28.

[0086] Specifically, before welding the steel pipe, through the rotation of the power motor 16, the welding end of the steel pipe to be welded is moved to the lower part of the corresponding welding position detection head 39. Then, the air supply pump 21 is started. The air supply pump 21 pumps the external gas into the hollow positioning ring 20. As the air pressure in the hollow positioning ring 20 increases, the positioning pipe 24 moves towards the side of the steel pipe. At the same time, as the air pressure in the hollow positioning ring 20 increases, the gas enters the arc-shaped positioning box 25, and the positioning rods 26 in the arc-shaped positioning box 25 also move towards the side of the steel pipe until they are in contact with the steel pipe, clamping and fixing the steel pipe. After the positioning rods 26 squeeze and fix the steel pipe, the power motor 16 is started to separate the lower conveying roller 6 and the upper conveying roller 4 from the steel pipe. Then, the driving motor 30 is started. The output end of the driving motor 30 will drive the driving rotating rod 28 to rotate. The rotation of the driving rotating rod 28 drives the driving gear 29 to rotate. The rotation of the driving gear 29 drives the driving gear ring 27 to rotate. The rotation of the driving gear ring 27 drives the hollow positioning ring 20 to perform a circular motion. Through the rotation of the hollow positioning ring 20, the steel pipe can be driven to perform a 360° circular motion.

[0087] As described above, the welding mechanism 003 is provided on the welding frame 1. The welding mechanism 003 is located within the welding cavity and is used to weld the steel pipes to be welded. The welding mechanism 003 includes a welding slide plate 31, a lateral adjustment cylinder 32, a longitudinal adjustment cylinder 33, a longitudinal adjustment pressure sensor 34, a welding head frame 35, a welding gun head group 36, and a pre-welding position detection assembly. The welding slide plate 31 is slidably arranged on the welding frame 1. The lateral adjustment cylinder 32 is installed on the welding frame 1, and the output end of the lateral adjustment cylinder 32 is connected to one end of the welding slide plate 31. The longitudinal adjustment cylinder 33 is installed on the welding slide plate 31, and the longitudinal adjustment pressure sensor 34 is installed on the output end of the longitudinal adjustment cylinder 33. The welding head frame 35 is arranged on the detection end of the longitudinal adjustment pressure sensor 34. The welding gun head group 36 is installed on the welding head frame 35 and is used to perform welding operations on the steel pipes. There are two pre-welding position detection assemblies, and the two pre-welding position detection assemblies are symmetrically arranged on both sides of the welding head frame 35 and are used to detect the weld track of the steel pipes to be welded.

[0088] Among them, the pre-welding position detection assembly includes a welding position spring shock absorber 37, a welding position pressure sensor 38, and a welding position detection head 39. One end of the welding position spring shock absorber 37 is arranged on the welding head frame 35. The welding position pressure sensor 38 is installed at the other end of the welding position spring shock absorber 37. The welding position detection head 39 is arranged on the detection end of the welding position pressure sensor 38.

[0089] Specifically, when the hollow positioning ring 20 drives the steel pipe to rotate, the longitudinal adjustment cylinder 33 is started. The output end of the longitudinal adjustment cylinder 33 drives the longitudinal adjustment pressure sensor 34 to move. The movement of the longitudinal adjustment pressure sensor 34 drives the welding head frame 35 to move. The movement of the welding head frame 35 drives the welding position spring shock absorber 37, the welding position pressure sensor 38, and the welding position detection head 39 to move, so that one end of the welding position detection head 39 is in mutual extrusion contact with the welding position of the steel pipe. As the steel pipe rotates, the roundness of the weld position of the steel pipe can be detected through the change in the value of the welding position pressure sensor 38, ensuring that there will be no excessive error after the weld positions of the two steel pipes are butted.

[0090] After detecting the roundness of the welded seam position of the steel pipe, by starting the positioning motor, the lower conveying roller 6 and the upper conveying roller 4 re-clamp and position the steel pipe. Then, by starting the suction pump 22, the gas in the hollow positioning ring 20 is pumped out, so that the positioning rod 26 is separated from the steel pipe. By starting the conveying motor 7, the welded seam positions of the two steel pipes are butted below the welding gun head group 36. Then, by starting the air supply pump 21, the positioning rod 26 clamps the steel pipe. By starting the power motor 16, the lower conveying roller 6 and the upper conveying roller 4 are separated from the steel pipe. Then, by starting the driving motor 30 and the longitudinal adjustment cylinder, the roundness of the edge of the welded seam of the steel pipe is detected by the welding position detection head 39. When the roundness meets the standard, it can be proved that the welded seams of the two steel pipes are aligned. Then, by starting the longitudinal position adjustment cylinder 33, the welding gun head group 36 is brought into contact with the welded seam position, and the steel pipe can be welded in a one-time complete welding operation.

[0091] Among them, the welding gun head group 36 is well-known to those skilled in the art and is a device for welding steel pipes. Its specific structure is not the main innovation point of this application and will not be elaborated here too much.

[0092] It should be further noted that when welding a steel pipe with a relatively short length, by driving the steel pipe to rotate, compared with the traditional rotation of the welding gun head group 36, during the welding process, the welding gun head group 36 is not only more stable, but also can perform a pre-welding circumferential simulation movement on the steel pipe before welding, so as to detect the quality of the steel pipe. At the same time, the quality of the welded seam after welding can be ensured, and the welding accuracy can be improved.

[0093] When welding a steel pipe with a relatively short length, the traditional single-direction movement clamping and positioning mechanism is abandoned. Through the cooperation of the upper conveying roller 4 and the lower conveying roller 6 with two-way movement and the cooperation of two relatively moving arc-shaped positioning boxes 25, when welding steel pipes with different diameters, the axes of the two steel pipes can always be positioned at the center of the conveying cavity. When welding two steel pipes with relatively low welding accuracy requirements, the welded seam positions of the two steel pipes can be butted directly by the rotation of the conveying motor 7. The steel pipe is driven to rotate by the driving motor 30, and the edge of the welded seam of the steel pipe is detected before welding by the welding position detection head 39, and then the welded seam is welded by the welding gun head group 36. In the actual welding process, when there is a deviation between the position of the welding gun head group 36 and the welded seam, the transverse adjustment cylinder 32 can be started, and the output end of the transverse adjustment cylinder 32 drives the welding slide plate 31 to move, and the position of the welding gun head group 36 can be finely adjusted.

[0094] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A welding device for steel pipe processing, characterized in that, Including: Welding rack (1); Welding positioning and conveying mechanism (001), there are two of the welding positioning and conveying mechanisms (001), and the two welding positioning and conveying mechanisms (001) are symmetrically arranged on the welding rack (1), and a welding cavity is formed between the two welding positioning and conveying mechanisms (001); Pipe fitting positioning and driving mechanism (002), there are two of the pipe fitting positioning and driving mechanisms (002), the pipe fitting positioning and driving mechanisms (002) are arranged on the welding rack (1), a synchronous driving component is arranged between the two pipe fitting positioning and driving mechanisms (002), the pipe fitting positioning and driving mechanisms (002) correspond to the welding positioning and conveying mechanisms (001) one by one, and the pipe fitting positioning and driving mechanisms (002) are located on the side of the welding positioning and conveying mechanisms (001) away from the welding cavity, and are used for positioning the steel pipe to be welded and driving the steel pipe to be welded to rotate at the same time; Welding mechanism (003) with position adjustment and pre-welding detection functions, the welding mechanism (003) is arranged on the welding rack (1), and the welding mechanism (003) is located in the welding cavity and is used for welding the steel pipe to be welded; The welding positioning and conveying mechanism (001) includes: Positioning and conveying rack (2), the positioning and conveying rack (2) is arranged on the welding rack (1); Conveying component with axis positioning function, the conveying component is slidably arranged on the positioning and conveying rack (2) and is used for driving the steel pipe to move; Axis positioning component with self-locking function, the axis positioning component is arranged on the positioning and conveying rack (2), and the axis positioning component is connected to the conveying component and is used for driving the conveying component to move; The conveying component includes: Upper conveying plate (3), there are two upper conveying plates (3), the upper conveying plates (3) are slidably arranged on the positioning and conveying rack (2), and a plurality of upper conveying rollers (4) are rotatably arranged between the two upper conveying plates (3); Lower conveying plate (5), there are two lower conveying plates (5), the lower conveying plates (5) are slidably arranged on the positioning and conveying rack (2), the lower conveying plates (5) correspond to the upper conveying plates (3) one by one, and a plurality of lower conveying rollers (6) are rotatably arranged between the two lower conveying plates (5), the lower conveying rollers (6) correspond to the upper conveying rollers (4) one by one, and a conveying cavity is formed between the lower conveying rollers (6) and the upper conveying rollers (4); Conveying motor (7), the conveying motor (7) is installed on one side of one of the lower conveying plates (5), and the output end of the conveying motor (7) is connected to one end of one of the lower conveying rollers (6); The axis positioning component includes: Bidirectional positioning lead screws (8), there are two of the bidirectional positioning lead screws (8), the bidirectional positioning lead screws (8) penetrate and are rotatably arranged on the positioning and conveying frame (2), the bidirectional positioning lead screws (8) correspond to the upper conveying plate (3) and the lower conveying plate (5) one by one, and two ball nut groups (9) are threadedly connected to the bidirectional positioning lead screws (8), and the two ball nut groups (9) are respectively connected to the corresponding upper conveying plate (3) and the lower conveying plate (5); A positioning power unit with a self-locking function, the positioning power unit is arranged on the positioning and conveying frame (2), and the positioning power unit is connected to the bidirectional positioning lead screw (8).

2. The welding device for steel pipe processing according to claim 1, characterized in that, The positioning power unit includes: A power box (10), the power box (10) is arranged on the positioning and conveying frame (2); A power rotating rod (11), the power rotating rod (11) penetrates and is rotatably arranged on the power box (10); First bevel gears (12), there are two of the first bevel gears (12), and the first bevel gears (12) are arranged on the power rotating rod (11); Second bevel gears (13), there are two of the second bevel gears (13), the second bevel gears (13) correspond to the bidirectional positioning lead screws (8) one by one, the second bevel gears (13) are arranged on the bidirectional positioning lead screws (8), the second bevel gears (13) correspond to the first bevel gears (12) one by one, and the second bevel gears (13) are meshed with the first bevel gears (12); A power worm gear (14), the power worm gear (14) is arranged on the power rotating rod (11); A power worm (15), the power worm (15) is rotatably arranged in the power box (10), and the power worm (15) is meshed with the power worm gear (14); A power motor (16), the power motor (16) is installed on one side of the power box (10), and the output end of the power motor (16) is connected to one end of the power worm (15); Gear protection boxes (17), there are two of the gear protection boxes (17), the gear protection boxes (17) correspond to the second bevel gears (13) one by one, the gear protection boxes (17) are arranged on the positioning and conveying frame (2), and both the second bevel gears (13) and the first bevel gears (12) are located inside the gear protection boxes (17).

3. A welding device for steel pipe processing according to claim 2, characterized in that, The pipe fitting positioning drive mechanism (002) includes: A top limiting frame (18), the top limiting frame (18) is arranged on the welding frame (1); A bottom limiting box (19), the bottom limiting box (19) is arranged on the welding frame (1); A hollow positioning ring (20), the hollow positioning ring (20) is rotatably arranged between the top limiting frame (18) and the bottom limiting box (19); An air supply pump (21), the air supply pump (21) is installed on the hollow positioning ring (20), and the air supply end of the air supply pump (21) is communicated with the hollow positioning ring (20); An air suction pump (22), the air suction pump (22) is installed on the hollow positioning ring (20), and the input end of the air suction pump (22) is communicated with the hollow positioning ring (20); A pneumatic telescopic positioning assembly, there are two of the pneumatic telescopic positioning assemblies, and the two pneumatic telescopic positioning assemblies are symmetrically communicated and arranged in the hollow positioning ring (20), and a positioning cavity is formed between the two pneumatic telescopic positioning assemblies.

4. A welding device for steel pipe processing according to claim 3, characterized in that, The pneumatic telescopic positioning assembly includes: A positioning cylinder (23), one end of the positioning cylinder (23) is communicated and arranged on the hollow positioning ring (20), and the other end of the positioning cylinder (23) penetrates and is hermetically slidably provided with a positioning pipe (24); An arc-shaped positioning box (25), the arc-shaped positioning box (25) is communicated and arranged on the side of the positioning pipe (24) away from the positioning cylinder (23); Positioning rods (26), there are multiple positioning rods (26), and the positioning rods (26) penetrate and are hermetically slidably arranged on the side of the arc-shaped positioning box (25) away from the positioning pipe (24) for clamping and fixing the steel pipe.

5. A welding device for steel pipe processing according to claim 4, characterized in that, The synchronous drive assembly includes: Drive toothed rings (27), there are two drive toothed rings (27), the drive toothed rings (27) correspond to the hollow positioning rings (20) one by one, and the drive toothed rings (27) are sleeved on the hollow positioning rings (20); A drive rotating rod (28), the drive rotating rod (28) penetrates and is rotatably arranged between the two bottom limit boxes (19); Drive gears (29), there are two drive gears (29), the drive gears (29) are arranged on the drive rotating rod (28), the drive gears (29) correspond to the drive toothed rings (27) one by one, and the drive gears (29) are meshed with the drive toothed rings (27); A drive motor (30), the drive motor (30) is installed on one side of one of the bottom limit boxes (19), and the output end of the drive motor (30) is connected to one end of the drive rotating rod (28).

6. The welding device for steel pipe processing according to claim 5, characterized in that, The welding mechanism (003) includes: A welding slide plate (31), the welding slide plate (31) is slidably arranged on the welding frame (1); A lateral positioning cylinder (32), the lateral positioning cylinder (32) is installed on the welding frame (1), and the output end of the lateral positioning cylinder (32) is connected to one end of the welding slide plate (31); A longitudinal positioning cylinder (33), the longitudinal positioning cylinder (33) is installed on the welding slide plate (31); A longitudinal adjustment pressure sensor (34), the longitudinal adjustment pressure sensor (34) is installed on the output end of the longitudinal positioning cylinder (33); A welding head frame (35), the welding head frame (35) is arranged on the detection end of the longitudinal adjustment pressure sensor (34); A welding gun head group (36), the welding gun head group (36) is installed on the welding head frame (35) for welding the steel pipe. Pre-welding position detection assembly. There are two pre-welding position detection assemblies, and the two pre-welding position detection assemblies are symmetrically arranged on both sides of the welding head frame (35) for detecting the weld track of the steel pipe to be welded.

7. A welding device for steel pipe processing according to claim 6, characterized in that, The pre-welding position detection assembly includes: Welding position spring shock absorber (37), one end of the welding position spring shock absorber (37) is arranged on the welding head frame (35); Welding position pressure sensor (38), the welding position pressure sensor (38) is installed at the other end of the welding position spring shock absorber (37); Welding position detection head (39), the welding position detection head (39) is arranged on the detection end of the welding position pressure sensor (38).

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