Welding device for steel pipe machining

Abstract

The invention relates to the technical field of steel pipe welding, and provides a welding device for steel pipe machining, which comprises a welding frame, two welding positioning conveying mechanisms, a pipe fitting positioning driving mechanism and a welding mechanism with positioning and pre-welding detection functions, and the two welding positioning conveying mechanisms are symmetrically arranged on the welding frame; a welding cavity is formed between the two welding positioning conveying mechanisms, the two pipe fitting positioning driving mechanisms are arranged on the welding frame, a synchronous driving assembly is arranged between the two pipe fitting positioning driving mechanisms, and the pipe fitting positioning driving mechanisms correspond to the welding positioning conveying mechanisms one to one. The pipe fitting positioning driving mechanism is located on the side, away from the welding cavity, of the welding positioning conveying mechanism. By means of the technical scheme, the problems that in the prior art, when a welding device for steel pipe machining is used for welding steel pipes with different diameters, the welding precision is low, and ideal welding cannot be conducted are solved.

Description

Technical Field

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

[0002] The welding device for steel pipe processing is a device used for connecting and splicing steel pipes. It is generally composed of a welding head group, a rail conveying system, a control system and a power supply system. The pipes to be welded are transported and connected by the rail conveying system, and then the rotating welding head group performs welding operations on the weld position of the pipe, thereby completing the welding operation of the steel pipe.

[0003] However, in the steel pipe welding device in the prior art, during the welding process of the steel pipe, the welding of the steel pipe is mostly completed by rotating the welding head group. However, in the actual welding process, the welding head group is driven to rotate by the power equipment, which is not only prone to high-frequency vibrations that drive the welding head to vibrate, resulting in errors in welding accuracy and welding strength, but the welding process is mostly divided into multi-stage welding, which is prone to welding gaps during the welding process. In addition, the positioning mechanism of some welding devices is difficult to ensure that the steel pipe is always in a stable state. It is difficult to accurately position steel pipes of different diameters, resulting in the problem that the connection between the steel pipes cannot achieve the ideal welding effect. Summary of the invention

[0004] The present invention provides a welding device for steel pipe processing, which is used to solve the problem mentioned in the background technology that the welding device for steel pipe processing in the prior art has low welding accuracy and cannot perform ideal welding when welding steel pipes of different diameters.

[0005] The technical solution of the present invention is as follows: A welding device for steel pipe processing, comprising a welding frame, a welding positioning and conveying mechanism, a pipe positioning and driving mechanism, and a welding mechanism with positioning and pre-welding detection functions; There are two welding positioning and conveying mechanisms, which are symmetrically arranged on the welding frame, and a welding cavity is formed between the two welding positioning and conveying mechanisms; There are two pipe positioning drive mechanisms, which are arranged on the welding frame, and a synchronous drive assembly is arranged between the two pipe positioning drive mechanisms. The pipe positioning drive mechanisms correspond to the welding positioning conveying mechanisms one by one, and the pipe positioning drive mechanisms are located on the side of the welding positioning conveying mechanism away from the welding cavity, and are used to position the steel pipe to be welded and drive the steel pipe to be welded to rotate; The welding mechanism is arranged on the welding frame, and the welding mechanism is located in the welding cavity, and is used for welding the steel pipe to be welded.

[0006] 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; The positioning and conveying frame is arranged on the welding frame; The conveying assembly is slidably arranged on the positioning conveying frame to drive the steel pipe to move; The axis positioning assembly is arranged on the positioning and conveying frame, and the axis positioning assembly is connected with the conveying assembly to drive the conveying assembly to move.

[0007] Further on the basis of the above scheme, the conveying assembly includes an upper conveying plate, a lower conveying plate and a conveying motor; There are two upper conveying plates, which are slidably arranged on the positioning conveying frame, and a plurality of upper conveying rollers are rotatably arranged between the two upper conveying plates; There are two lower conveying plates, which are slidably arranged on the positioning conveying frame, and 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, and 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; 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.

[0008] Further on the basis of the above scheme, the axis positioning assembly includes a bidirectional positioning screw and a positioning power unit with a self-locking function; The two bidirectional positioning screw rods are provided with two, and the two bidirectional positioning screw rods are penetrated and rotatably arranged on the positioning and conveying frame, and the two bidirectional positioning screw rods correspond to the upper conveying plate and the lower conveying plate one by one, and two ball nut groups are threadedly connected on the bidirectional positioning screw rods, and the two ball nut groups are respectively connected to the corresponding upper conveying plate and the lower conveying plate; The positioning power unit is arranged on the positioning conveying frame, and the positioning power unit is connected to the bidirectional positioning screw rod.

[0009] Further on the basis of the above scheme, the positioning power unit includes a power box, a power rotating rod, a bevel gear 1, a bevel gear 2, a power worm wheel, a power worm, a power motor and a gear protection box; The power box is arranged on the positioning conveying frame; The power rotating rod penetrates and is rotatably arranged on the power box; There are two bevel gears 1, and the bevel gear 1 is arranged on the power rotating rod; There are two bevel gears 2, and the bevel gears 2 correspond to the two-way positioning screw rods one by one. The bevel gears 2 are arranged on the two-way positioning screw rods, and the bevel gears 2 correspond to the bevel gears one by one. The bevel gears 2 are meshed with the bevel gear 1; The power worm gear is arranged on the power rotating rod; The power worm is rotatably arranged in the power box, and the power worm is meshed with the power worm wheel; 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; The gear protection boxes are provided with two, and the gear protection boxes correspond to the bevel gear 2 one by one. The gear protection boxes are arranged on the positioning conveying frame, and the bevel gear 2 and the bevel gear 1 are both located in the gear protection boxes.

[0010] As a preferred technical solution of the present application, the pipe positioning drive mechanism includes a top limit frame, a bottom limit box, a hollow positioning ring, an air supply pump, an air suction pump and a pneumatic telescopic positioning assembly; The top limiting frame is arranged on the welding frame; The bottom limit box is arranged on the welding frame; The hollow positioning ring is rotatably arranged between the top limiting frame and the bottom limiting box; The air supply pump is installed on the hollow positioning ring, and the air delivery end of the air supply pump is connected to the hollow positioning ring; The suction pump is installed on the hollow positioning ring, and the input end of the suction pump is connected to the hollow positioning ring; There are two pneumatic telescopic positioning components, and the two pneumatic telescopic positioning components are symmetrically connected and arranged in the hollow positioning ring, and a positioning cavity is formed between the two pneumatic telescopic positioning components.

[0011] Further on the basis of the above scheme, the pneumatic telescopic positioning assembly includes a positioning cylinder, an arc-shaped positioning box and a positioning rod; One end of the positioning cylinder is connected to the hollow positioning ring, and the other end of the positioning cylinder is penetrated and sealed and slidably provided with a positioning tube; The arc-shaped positioning box is arranged in communication with the positioning tube on a side away from the positioning cylinder; There are multiple positioning rods, which penetrate and are sealingly slidably arranged on a side of the arc-shaped positioning box away from the positioning tube, and are used to clamp and fix the steel tube.

[0012] Further on the basis of the above scheme, the synchronous drive assembly includes a driving gear ring, a driving rotating rod, a driving gear and a driving motor; There are two drive gear rings, each of which corresponds to the hollow positioning ring one by one, and each drive gear ring is sleeved on the hollow positioning ring; The driving rotating rod penetrates and is rotatably arranged between the two bottom limit boxes; There are two driving gears, which are arranged on the driving rotating rod, and the driving gears correspond to the driving gear rings one by one, and the driving gears mesh with the driving gear rings; The driving motor is installed on one side of one of the bottom limit boxes, and the output end of the driving motor is connected to one end of the driving rotating rod.

[0013] On the basis of the above scheme, the welding mechanism includes a welding slide plate, a lateral adjustment cylinder, a longitudinal adjustment cylinder, a longitudinal adjustment pressure sensor, a welding head frame, a welding gun head group and a pre-welding welding position detection component; The welding slide plate is slidably arranged on the welding frame; The lateral adjustment cylinder is installed on the welding frame, and the output end of the lateral adjustment cylinder is connected to one end of the welding slide plate; The longitudinal adjustment cylinder is installed on the welding slide; The longitudinal adjustment pressure sensor is installed on the output end of the longitudinal adjustment cylinder; The welding head frame is arranged on the detection end of the longitudinal adjustment pressure sensor; The welding gun head group is installed on the welding head frame and is used for welding the steel pipe; 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.

[0014] 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; One end of the welding position spring shock absorber is arranged on the welding head frame; The welding position pressure sensor is installed at the other end of the welding position spring shock absorber; The welding position detection head is arranged on the detection end of the welding position pressure sensor.

[0015] 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.

[0016] The working principle and beneficial effects of the present invention are: 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; 2. According to the present invention, before welding the steel pipe, the welding end of the steel pipe to be welded is moved to the bottom of the corresponding welding position detection head through the rotation of the power motor, and then the air supply pump is started to pump the external gas into the hollow positioning ring through the air supply pump. As the air pressure in the hollow positioning ring increases, the positioning tube moves toward 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 positioning box, and the positioning rods in the arc positioning box move toward one side of the steel pipe at the same time until they meet the steel pipe to clamp and fix 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, and then the driving motor is started. The output end of the driving motor will drive the driving rotating rod to rotate, and the rotation of the driving rotating rod drives the driving gear to rotate. The rotation of the driving gear drives the driving gear ring to rotate, and the rotation of the driving gear ring drives the hollow positioning ring to perform circular motion. The rotation of the hollow positioning ring can drive the steel pipe to perform 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. 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 and the welding position of the steel pipe are squeezed and touched each other. With the rotation of the steel pipe, the roundness of the steel pipe weld position can be detected through the change of the value of the welding position pressure sensor to ensure that there will be no excessive error after the weld positions of the two steel pipes are connected relative to each other. 3. The present invention, after detecting the roundness of the steel pipe weld position, starts the positioning motor to make the lower conveying roller and the upper conveying roller re-clamp and position the steel pipe, and then starts the suction pump to extract the gas in the hollow positioning ring to separate the positioning rod from the steel pipe, and starts the conveying motor to make the weld positions of the two steel pipes dock below the welding gun head group, and then starts the air supply pump to make the positioning rod clamp the steel pipe, and starts the power motor to separate the lower conveying roller and the upper conveying roller from the steel pipe, and then starts the driving motor and the longitudinal adjustment cylinder, and uses the welding position detection head to detect the roundness of the edge of the steel pipe weld. When the roundness meets the standard, it can be proved that the welds of the two steel pipes have been aligned, and then starts the longitudinal adjustment cylinder to make the welding gun head group contact the weld position, and then the steel pipe can be welded once and for all; 4. The present invention, when welding a short steel pipe, drives the steel pipe to rotate. Compared with the traditional welding gun head group, the welding gun head group is not only more stable during the welding process, but also can perform pre-welding circular simulation movement on the steel pipe before welding, so as to detect the quality of the steel pipe, ensure the quality of the weld after welding, and improve the welding accuracy; 5. The present invention abandons the traditional unidirectional clamping and positioning mechanism when welding short steel pipes. Through the cooperation of the upper conveying roller and the lower conveying roller that move in both directions and the cooperation of the two arc-shaped positioning boxes that move relative to each other, when welding steel pipes of different diameters, the axis 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 weld positions of the two steel pipes can be directly connected by rotating the conveying motor. The steel pipes are driven to rotate by the driving motor, and the edge of the steel pipe weld is pre-welded by the welding position detection head. The weld can then be welded by the welding gun head group. In the actual welding process, when the position of the welding gun head group and the weld deviates, the position of the welding gun head group can be fine-tuned by starting the transverse positioning cylinder so that the output end of the transverse positioning cylinder drives the welding slide plate to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of a partial cross-section of the welding positioning and conveying mechanism of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the local enlarged structure at point A in the middle; Figure 4 It is a structural schematic diagram of a partial cross-section of the pipe positioning drive mechanism in the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the local enlarged structure at B in the middle; Figure 6 It is a structural schematic diagram of the synchronous drive component in the present invention; Figure 7 It is a structural schematic diagram of the welding mechanism in the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the local enlarged structure at point C in the middle.

[0019] The numbers in the figure represent: 001, welding positioning and conveying mechanism; 002, pipe positioning and driving mechanism; 003, welding mechanism; 1. Welding frame; 2. Positioning conveyor frame; 3. Upper conveyor plate; 4. Upper conveyor roller; 5. Lower conveyor plate; 6. Lower conveyor roller; 7. Conveying motor; 8. Bidirectional positioning screw; 9. Ball nut assembly; 10. Power box; 11. Power rotating rod; 12. Bevel gear 1; 13. Bevel gear 2; 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. Air suction pump; 23. Positioning cylinder; 24. Positioning tube; 25. Arc positioning box; 26. Positioning rod; 27. Driving gear ring; 28. Driving rotating rod; 29. ​​Driving gear; 30. Driving motor; 31. Welding slide; 32. Horizontal adjustment cylinder; 33. Longitudinal adjustment cylinder; 34. Longitudinal adjustment pressure sensor; 35. Welding head rack; 36. Welding gun head group; 37. Welding position spring shock absorber; 38. Welding position pressure sensor; 39. Welding position detection head. DETAILED DESCRIPTION The following will be combined with 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.

[0020] like Figures 1 to 8 As shown, this embodiment proposes a welding device for steel pipe processing, including a welding frame 1, a welding positioning and conveying mechanism 001, a pipe positioning and driving mechanism 002, and a welding mechanism 003 with positioning and pre-welding detection functions.

[0021] As mentioned 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 axial positioning function, and an axial positioning component with a self-locking function. The positioning and conveying frame 2 is arranged on the welding frame 1, and the conveying component is slidably arranged on the positioning and conveying frame 2 to drive the steel pipe to move. The axial positioning component is arranged on the positioning and conveying frame 2, and the axial positioning component is connected to the conveying component to drive the conveying component to move.

[0022] Wherein, the conveying assembly includes an upper conveying plate 3, a lower conveying plate 5 and a conveying motor 7, two upper conveying plates 3 are provided, 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, two lower conveying plates 5 are provided, the lower conveying plates 5 are slidably arranged on the positioning conveying frame 2, the lower conveying plates 5 correspond one to one with the upper conveying plates 3, a plurality of lower conveying rollers 6 are rotatably arranged between the two lower conveying plates 5, the lower conveying rollers 6 correspond one to one with the upper conveying rollers 4, 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; Among them, the axis positioning component includes a bidirectional positioning screw 8 and a positioning power unit with a self-locking function. There are two bidirectional positioning screws 8, which pass through and are rotatably arranged on the positioning conveying frame 2. The bidirectional positioning screw 8 corresponds to the upper conveying plate 3 and the lower conveying plate 5 one by one. Two ball nut groups 9 are threadedly connected to the bidirectional positioning screw 8, and the two ball nut groups 9 are respectively connected to the corresponding upper conveying plate 3 and the lower conveying plate 5. The positioning power unit is arranged on the positioning conveying frame 2, and the positioning power unit is connected to the bidirectional positioning screw 8. The positioning power unit includes a power box 10, a power rotating rod 11, a bevel gear 12, a bevel gear 2 13, a power worm wheel 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, and the power rotating rod 11 passes through and is rotatably arranged on the power box 10 There are two bevel gears 12, which are arranged on the power rotating rod 11, and there are two bevel gears 13. The bevel gears 13 correspond to the two-way positioning screw 8 one by one. The bevel gears 13 are arranged on the two-way positioning screw 8. The bevel gears 13 correspond to the bevel gears 12 one by one. The bevel gears 13 are meshed with the bevel gears 12. The power worm gear 14 is arranged on the power rotating rod 11. The power worm gear 15 is rotatably arranged in the power box 10. The power worm gear 15 is meshed with the power worm gear 14. The power motor 16 is installed on one side of the power box 10. The output end of the power motor 16 is connected to one end of the power worm gear 15. There are two gear protection boxes 17, which correspond to the bevel gears 13 one by one. The gear protection boxes 17 are arranged on the positioning conveyor frame 2. The bevel gears 13 and the bevel gears 12 are both located in the gear protection boxes 17.

[0023] Among them, two feed rollers are rotatably arranged on the welding frame 1, and the feed rollers correspond to the pipe positioning drive mechanism 002 one by one. The feed rollers are located on one side of the pipe positioning drive mechanism 002 and the welding positioning conveying mechanism 001, and are used to support the pipes to be welded for feeding and conveying.

[0024] Specifically, when two steel pipes to be welded are butt-jointed and conveyed, the welding ends of the steel pipes are respectively moved to the welding positioning and conveying mechanism 001 through the two pipe positioning drive mechanisms 002 under the support of the feed roller, and then the two power motors 16 are started synchronously, and the output end of the power motor 16 drives the power worm 15 to rotate, and the rotation of the power worm 15 drives the power worm gear 14 to rotate, and the rotation of the power worm gear 14 drives the power rotating rod 11 to rotate, and the rotation of the power rotating rod 11 drives the bevel gear 12 to rotate, and the rotation of the bevel gear 12 drives the bevel gear 2 13 to rotate, and the rotation of the bevel gear 2 13 The two-way positioning screw rod 8 is driven to rotate, so that the two ball nut groups 9 on the two-way positioning screw rod 8 move relative to each other, and the movement of the ball nut group 9 drives the upper conveying plate 3 and the lower conveying plate 5 to move relative to each other, so that the plurality of upper conveying rollers 4 and the plurality of lower conveying rollers 6 move relative to each other, and the steel pipe to be welded is clamped by the movement of the upper conveying rollers 4 and the lower conveying rollers 6, and then the conveying motor 7 is started, and the lower conveying roller 6 connected to it is driven to rotate through the output end of the conveying motor 7, and under the rotation of the lower conveying roller 6, the steel pipe to be welded can be conveyed and adjusted.

[0025] As mentioned above, there are two pipe positioning drive mechanisms 002, which are arranged on the welding frame 1, and a synchronous drive assembly is arranged between the two pipe positioning drive mechanisms 002. The pipe positioning drive mechanism 002 corresponds to the welding positioning conveying mechanism 001 one by one. The pipe positioning drive mechanism 002 is located on the side of the welding positioning conveying mechanism 001 away from the welding cavity, and is used to position the steel pipe to be welded and drive the steel pipe to be welded to rotate.

[0026] Among them, the pipe positioning drive mechanism 002 includes a top limit frame 18, a bottom limit box 19, a hollow positioning ring 20, an air supply pump 21, an air suction pump 22 and a pneumatic telescopic positioning assembly. The top limit frame 18 is arranged on the welding frame 1, the bottom limit box 19 is arranged on the welding frame 1, the hollow positioning ring 20 is rotatably arranged between the top limit frame 18 and the bottom limit box 19, the air supply pump 21 is installed on the hollow positioning ring 20, and the air delivery end of the air supply pump 21 is connected to the hollow positioning ring 20, the air suction pump 22 is installed on the hollow positioning ring 20, and the input end of the air suction pump 22 is connected to the hollow positioning ring 20, and two pneumatic telescopic positioning assemblies are provided, and the two pneumatic telescopic positioning assemblies are symmetrically connected and arranged in the hollow positioning ring 20, and a positioning cavity is formed between the two pneumatic telescopic positioning assemblies.

[0027] 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, and the other end of the positioning cylinder 23 is penetrated and sealed and slidably arranged with a positioning tube 24. The arc-shaped positioning box 25 is connected and arranged on the side of the positioning tube 24 away from the positioning cylinder 23. There are multiple positioning rods 26. The positioning rods 26 are penetrated and sealed and slidably arranged on the side of the arc-shaped positioning box 25 away from the positioning tube 24, which are used to clamp and fix the steel pipe.

[0028] Among them, the step drive 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, which correspond to the hollow positioning ring 20 one by one. The driving gear ring 27 is sleeved on the hollow positioning ring 20. The driving rotating rod 28 passes through and is rotatably arranged between the two bottom limit boxes 19. There are two driving gears 29, which are arranged on the driving rotating rod 28. The driving gear 29 corresponds to the driving gear ring 27 one by one, and the driving gear 29 is meshed with the driving gear ring 27. The driving motor 30 is installed on one side of one of the bottom limit boxes 19, and the output end of the driving motor 30 is connected to one end of the driving rotating rod 28.

[0029] Specifically, before welding the steel pipe, the welding end of the steel pipe to be welded is moved to the bottom of the corresponding welding position detection head 39 through the rotation of the power motor 16, and then the air supply pump 21 is started to pump the outside gas into the hollow positioning ring 20 through the air supply pump 21. As the air pressure in the hollow positioning ring 20 increases, the positioning tube 24 moves toward one 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 positioning box 25, and the positioning rod 26 in the arc positioning box 25 moves toward one side of the steel pipe at the same time until it is aligned with the steel pipe. At the joint, the steel pipe is clamped and fixed. After the positioning rod 26 squeezes and fixes 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, and then the driving motor 30 is started. The output end of the driving motor 30 will drive the driving rotating rod 28 to rotate, and 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. The rotation of the hollow positioning ring 20 can drive the steel pipe to perform a 360° circular motion.

[0030] As mentioned above, the welding mechanism 003 is arranged on the welding frame 1, and the welding mechanism 003 is located in the welding cavity, and is used to weld the steel pipe to be welded. The welding mechanism 003 includes a welding slide 31, a transverse 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 welding position detection component. The welding slide 31 is slidably arranged on the welding frame 1, the transverse adjustment cylinder 32 is installed on the welding frame 1, the output end of the transverse adjustment cylinder 32 is connected to one end of the welding slide 31, the longitudinal adjustment cylinder 33 is installed on the welding slide 31, 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, and the welding gun head group 36 is installed on the welding head frame 35, and is used to weld the steel pipe. There are two pre-welding welding position detection components, and the two pre-welding welding position detection components are symmetrically arranged on both sides of the welding head frame 35, which are used to detect the weld trajectory of the steel pipe to be welded.

[0031] Among them, the pre-welding welding position detection component 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 set on the welding head frame 35, the welding position pressure sensor 38 is installed on the other end of the welding position spring shock absorber 37, and the welding position detection head 39 is set on the detection end of the welding position pressure sensor 38.

[0032] Specifically, when the hollow positioning ring 20 drives the steel pipe to rotate, the longitudinal adjustment cylinder 33 is started, and the output end of the longitudinal adjustment cylinder 33 drives the longitudinal adjustment pressure sensor 34 to move, and the movement of the longitudinal adjustment pressure sensor 34 drives the welding head frame 35 to move, and 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 and the welding position of the steel pipe are squeezed and touched each other. As the steel pipe rotates, the roundness of the weld position of the steel pipe can be detected through the change of the value of the welding position pressure sensor 38, to ensure that there will be no excessive error after the weld positions of the two steel pipes are connected.

[0033] After the roundness of the steel pipe weld position is detected, the positioning motor is started to make the lower conveying roller 6 and the upper conveying roller 4 clamp the steel pipe again, and then the suction pump 22 is started to extract the gas in the hollow positioning ring 20 to separate the positioning rod 26 from the steel pipe, and the conveying motor 7 is started to make the weld positions of the two steel pipes dock below the welding gun head group 36, and then the air supply pump 21 is started to make the positioning rod 26 clamp the steel pipe, and the power motor 16 is started to separate the lower conveying roller 6 and the upper conveying roller 4 from the steel pipe, and then the driving motor 30 and the longitudinal adjustment cylinder are started, and the roundness of the edge of the steel pipe weld is detected by the welding position detection head 39. When the roundness meets the standard, it can be proved that the welds of the two steel pipes have been aligned, and then the longitudinal adjustment cylinder 33 is started to make the welding gun head group 36 contact the weld position, and the steel pipe can be welded once and for all.

[0034] Among them, the welding gun head group 36 is a device for welding steel pipes that is well known to those skilled in the art. The specific structure is not the main innovation of this application and will not be described in detail here.

[0035] It should be noted that when welding a shorter steel pipe, by driving the steel pipe to rotate, compared with the traditional rotation of the welding gun head group 36, the welding gun head group 36 is not only more stable during the welding process, but also the steel pipe can be pre-welded with a circular simulation motion before welding, so as to detect the quality of the steel pipe, ensure the quality of the weld after welding, and improve the welding accuracy.

[0036] When welding shorter steel pipes, the traditional unidirectional clamping and positioning mechanism is abandoned. Through the cooperation of the upper conveying roller 4 and the lower conveying roller 6 that move in both directions, and the cooperation of the two arc-shaped positioning boxes 25 that move relative to each other, when welding steel pipes of different diameters, the axis 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 weld positions of the two steel pipes can be directly connected by rotating the conveying motor 7, and the steel pipe is driven to rotate by the driving motor 30. The edge of the steel pipe weld is pre-welded by the welding position detection head 39, and then the weld is welded by the welding gun head group 36. In the actual welding process, when the position of the welding gun head group 36 deviates from the weld, the horizontal adjustment cylinder 32 can be started so that the output end of the horizontal adjustment cylinder 32 drives the welding slide 31 to move, and the position of the welding gun head group 36 can be fine-tuned.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding device for steel pipe processing, characterized in that: include: Welding frame (1); A welding positioning and conveying mechanism (001), wherein two welding positioning and conveying mechanisms (001) are provided, and the two welding positioning and conveying mechanisms (001) are symmetrically arranged on the welding frame (1), and a welding cavity is formed between the two welding positioning and conveying mechanisms (001); A pipe positioning drive mechanism (002), wherein two pipe positioning drive mechanisms (002) are provided, the pipe positioning drive mechanisms (002) are arranged on the welding frame (1), a synchronous drive assembly is arranged between the two pipe positioning drive mechanisms (002), the pipe positioning drive mechanisms (002) correspond to the welding positioning conveying mechanisms (001) one by one, the pipe positioning drive mechanisms (002) are located on a side of the welding positioning conveying mechanism (001) away from the welding cavity, and are used to position the steel pipe to be welded and drive the steel pipe to be welded to rotate; A welding mechanism (003) having positioning and pre-welding detection functions, wherein the welding mechanism (003) is arranged on the welding frame (1), and the welding mechanism (003) is located in the welding cavity and is used to weld a steel pipe to be welded.

2. A welding device for steel pipe processing according to claim 1, characterized in that: The welding positioning and conveying mechanism (001) comprises: A positioning conveying frame (2), wherein the positioning conveying frame (2) is arranged on the welding frame (1); A conveying assembly with an axis positioning function, the conveying assembly being slidably arranged on the positioning conveying frame (2) and being used to drive the steel pipe to move; An axis positioning component with a self-locking function, the axis positioning component is arranged on the positioning and conveying frame (2), and the axis positioning component is connected to the conveying component to drive the conveying component to move.

3. A welding device for steel pipe processing according to claim 2, characterized in that: The conveying assembly comprises: An upper conveying plate (3), wherein two upper conveying plates (3) are provided, the upper conveying plates (3) are slidably arranged on the positioning conveying frame (2), and a plurality of upper conveying rollers (4) are rotatably arranged between the two upper conveying plates (3); A lower conveying plate (5), wherein two lower conveying plates (5) are provided, and the lower conveying plates (5) are slidably arranged on the positioning conveying frame (2), and the lower conveying plates (5) correspond one-to-one with the upper conveying plates (3), and a plurality of lower conveying rollers (6) are rotatably arranged between the two lower conveying plates (5), and the lower conveying rollers (6) correspond one-to-one with the upper conveying rollers (4), and a conveying cavity is formed between the lower conveying rollers (6) and the upper conveying rollers (4); A conveying motor (7), wherein the conveying motor (7) is mounted on one side of one of the lower conveying plates (5), and an output end of the conveying motor (7) is connected to one end of one of the lower conveying rollers (6).

4. A welding device for steel pipe processing according to claim 3, characterized in that: The axis positioning assembly comprises: A bidirectional positioning screw rod (8), wherein two bidirectional positioning screw rods (8) are provided, and the bidirectional positioning screw rods (8) penetrate and are rotatably arranged on the positioning conveying frame (2), and the bidirectional positioning screw rods (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 on the bidirectional positioning screw rod (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 conveying frame (2), and the positioning power unit is connected to the bidirectional positioning screw rod (8).

5. A welding device for steel pipe processing according to claim 4, characterized in that: The positioning power unit comprises: A power box (10), the power box (10) being arranged on the positioning conveying frame (2); A power rotating rod (11), the power rotating rod (11) penetrates through and is rotatably disposed on the power box (10); Bevel gear one (12), two bevel gears (12) are provided, and the bevel gear one (12) is arranged on the power rotating rod (11); Bevel gear 2 (13), two bevel gears 2 (13) are provided, the bevel gear 2 (13) corresponds one-to-one with the bidirectional positioning screw (8), the bevel gear 2 (13) is arranged on the bidirectional positioning screw (8), the bevel gear 2 (13) corresponds one-to-one with the bevel gear 1 (12), and the bevel gear 2 (13) is meshed with the bevel gear 1 (12); A power worm gear (14), wherein the power worm gear (14) is arranged on the power rotating rod (11); a power worm (15), the power worm (15) being rotatably disposed in the power box (10), the power worm (15) being meshed with the power worm wheel (14); A power motor (16), the power motor (16) being mounted on one side of the power box (10), the output end of the power motor (16) being connected to one end of the power worm (15); A gear protection box (17), wherein two gear protection boxes (17) are provided, and the gear protection boxes (17) correspond one to one with the bevel gear 2 (13); the gear protection box (17) is arranged on the positioning conveying frame (2), and the bevel gear 2 (13) and the bevel gear 1 (12) are both located in the gear protection box (17).

6. A welding device for steel pipe processing according to claim 5, characterized in that: The pipe positioning drive mechanism (002) comprises: A top limiting frame (18), wherein the top limiting frame (18) is arranged on the welding frame (1); A bottom limit box (19), wherein the bottom limit box (19) is arranged on the welding frame (1); a hollow positioning ring (20), the hollow positioning ring (20) being rotatably disposed between the top limiting frame (18) and the bottom limiting box (19); An air supply pump (21), the air supply pump (21) being mounted on the hollow positioning ring (20), and the air delivery end of the air supply pump (21) being in communication with the hollow positioning ring (20); An air suction pump (22), the air suction pump (22) being mounted on the hollow positioning ring (20), and an input end of the air suction pump (22) being connected to the hollow positioning ring (20); A pneumatic telescopic positioning assembly, wherein two pneumatic telescopic positioning assemblies are provided, and the two pneumatic telescopic positioning assemblies are symmetrically connected and arranged in a hollow positioning ring (20), and a positioning cavity is formed between the two pneumatic telescopic positioning assemblies.

7. A welding device for steel pipe processing according to claim 6, characterized in that: The pneumatic telescopic positioning assembly comprises: A positioning cylinder (23), one end of the positioning cylinder (23) being arranged in communication with the hollow positioning ring (20), and the other end of the positioning cylinder (23) being penetrated and sealingly slidably provided with a positioning tube (24); An arc-shaped positioning box (25), the arc-shaped positioning box (25) being arranged in communication with the positioning tube (24) on a side away from the positioning cylinder (23); A positioning rod (26), wherein a plurality of the positioning rods (26) are provided, and the positioning rod (26) penetrates through and is sealingly slidably arranged on a side of the arc-shaped positioning box (25) away from the positioning tube (24), and is used to clamp and fix the steel tube.

8. A welding device for steel pipe processing according to claim 7, characterized in that: The synchronous drive assembly comprises: A driving gear ring (27), wherein two driving gear rings (27) are provided, and the driving gear rings (27) correspond one to one to the hollow positioning ring (20), and the driving gear rings (27) are sleeved on the hollow positioning ring (20); A driving rotating rod (28), the driving rotating rod (28) passing through and rotatably disposed between the two bottom limit boxes (19); A driving gear (29), wherein two driving gears (29) are provided, and the driving gears (29) are arranged on the driving rotating rod (28), and the driving gears (29) correspond to the driving gear ring (27) one by one, and the driving gears (29) mesh with the driving gear ring (27); A driving motor (30) is installed on one side of one of the bottom limit boxes (19), and an output end of the driving motor (30) is connected to one end of the driving rotating rod (28).

9. A welding device for steel pipe processing according to claim 8, characterized in that: The welding mechanism (003) comprises: A welding slide plate (31), wherein the welding slide plate (31) is slidably arranged on the welding frame (1); A transverse positioning cylinder (32), the transverse positioning cylinder (32) being mounted on the welding frame (1), the output end of the transverse positioning cylinder (32) being connected to one end of the welding slide plate (31); A longitudinal adjustment cylinder (33), wherein the longitudinal adjustment cylinder (33) is mounted on the welding slide plate (31); A longitudinal adjustment pressure sensor (34), the longitudinal adjustment pressure sensor (34) being mounted on an output end of the longitudinal adjustment cylinder (33); A welding head frame (35), the welding head frame (35) being arranged on a detection end of the longitudinal adjustment pressure sensor (34); A welding gun head group (36), the welding gun head group (36) is mounted on the welding head frame (35) and is used to perform welding operations on steel pipes; A pre-weld welding position detection assembly, wherein two pre-weld welding position detection assemblies are provided, and the two pre-weld 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 pipe to be welded.

10. A welding device for steel pipe processing according to claim 9, characterized in that: The pre-welding welding position detection component comprises: A welding position spring damper (37), one end of the welding position spring damper (37) being arranged on the welding head frame (35); A welding position pressure sensor (38), the welding position pressure sensor (38) being mounted on the other end of the welding position spring shock absorber (37); A welding position detection head (39), wherein the welding position detection head (39) is arranged on a detection end of the welding position pressure sensor (38).

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