Automatic welding equipment inside a steel pipe

Abstract

This invention discloses an automatic welding device for steel pipes, comprising a disc and a collar arranged axially; multiple flaps are rotatably arranged in a circumferential array on the disc, and the flaps flip to fit against the inner wall of steel pipe a; multiple support rods are rotatably arranged in a circumferential array on the collar, and the support rods flip so that their other ends abut against the inner wall of steel pipe b; it also includes a telescopic unit for driving the collar to move radially relative to the disc, so that the ends of steel pipe b and steel pipe a fit together; and a welding mechanism including a welding torch for welding the gap after fitting. The automatic welding device for steel pipes provided by this invention uses multiple flaps to flip and fit against the inner wall of steel pipe a to fix the disc and steel pipe a relative to each other, and multiple support rods to flip to fix the collar and steel pipe b relative to each other, thereby utilizing the telescopic unit to drive the collar to move radially relative to the disc to quickly align the ends of steel pipe b and steel pipe a on adjacent sides.

Description

Technical Field

[0001] This invention relates to the field of automatic welding equipment technology, and specifically to an automatic welding device for steel pipes. Background Technology

[0002] Natural gas pipelines, as conduits for transporting natural gas, require the use of multiple sections of steel pipes for welding during installation. These sections not only facilitate transportation but also allow for adaptation to specific terrain conditions during subsequent welding and installation, thereby ensuring the continuity and structural strength of the natural gas pipeline.

[0003] According to patent number CN115041792B, published on April 18, 2023, an automatic welding device for all positions of butt welds of small-diameter steel pipes is disclosed. It includes two sets of symmetrical roller supports. The first set of roller supports includes steel plates A, B, and C. Flange linear bearings A-F and flange nuts A are fixed on steel plate A. Flange linear bearings G and H are fixed on steel plate C, and flange linear bearings I-L are fixed on steel plate B. One end of steel sleeve A is fitted with flange linear bearing A, and the other end with flange linear bearing G. One end of steel sleeve B is fitted with flange linear bearing B, and the other end with flange linear bearing H. One end of steel sleeve C is fitted with flange linear bearing C, and the other end with flange linear bearing I. One end of steel sleeve D is fitted with flange linear bearing D, and the other end with flange linear bearing G. One end of steel sleeve E is fitted with flange linear bearing E, and the other end with flange linear bearing J. One end of steel sleeve F is fitted with flange linear bearing... F, the other end is fitted with a flange linear bearing K; steel sleeves A to F ensure that each flange linear bearing is coaxially positioned and that steel plate A is parallel and equidistant from steel plate B and steel plate C; steel plates A, B, and C are clamped and fixed with bolts to form the first set of roller supports; the rollers on the roller supports are used to clamp the steel pipes, and the roller supports are equipped with a drive device to drive the roller supports to run along the steel pipes; a welding device is set on steel plate A of the first set of roller supports, which can move with the roller supports during welding and can adjust its position; the two sets of roller supports are positioned and moved by optical shafts A, B, C, D, E, and F passing through each flange linear bearings, and the distance between the two sets of roller supports is adjusted by positive and negative threaded screws and flange nuts A and B, thereby adjusting the gap of the butt weld formed by steel pipes A and B; the positive and negative threaded screws are rotated by handwheel A.

[0004] The aforementioned patent describes an automatic welding device for small-diameter steel pipe butt welds in all positions. This device automatically moves along the outer wall of the steel pipe in conjunction with a welding torch to weld two pipes together, significantly improving welding efficiency compared to manual welding. Currently, manual welding is still the most common method for welding the inside of steel pipes. This is because manual welding reduces the use and maintenance costs of large mechanical welding equipment, and personnel are easily reassigned and can be adjusted at any time. Currently, welding steel pipes requires alignment to ensure the weld meets the required standards. Conventionally, this is achieved using a crane with manual guidance and movement. However, even after alignment, separate mounting frames are still needed for each pipe to ensure fixation. Furthermore, the bottom weld inside the steel pipe is still mostly done manually. Therefore, fixing and welding the steel pipes takes a considerable amount of time and is inefficient. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic welding device for steel pipes, which can quickly fix and weld two steel pipes together, thereby accelerating the welding efficiency between pipes.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic welding device for steel pipes, comprising a disc and a collar arranged along the axial direction;

[0007] The disc component is provided with a circumferential array of multiple flaps that rotate and flip to fit against the inner wall of the steel pipe a.

[0008] The collar is rotatably arranged in a circular array of multiple support rods, and the multiple support rods flip so that the other end abuts against the inner wall of the steel pipe b.

[0009] It also includes a telescopic unit for driving the collar to move radially relative to the disc component, so that the ends of steel pipe b and steel pipe a fit together;

[0010] It also includes a welding mechanism, which includes a welding torch for welding the gaps after bonding.

[0011] Preferably, the disc component is rotatably provided with a drive disc that is rotatably connected to the flip plate, and the disc component is provided with a fixed shaft arranged in a waist groove opened on the flip plate.

[0012] Preferably, the outer wall of one side of the drive disk is provided with a guide sleeve with an arc-shaped track on its surface;

[0013] It also includes a boom that moves radially and slides with the curved track.

[0014] Preferably, the outer wall of the collar is slidably provided with a slider, and the first end of the connecting rod hinged on the slider is hinged to the support rod.

[0015] Preferably, the inner wall of the collar is hinged with a plurality of levers, and the first end of the auxiliary rod hinged on the lever is hinged to the slider.

[0016] It also includes a drive shaft that moves radially, with the lever located in the path of the drive shaft.

[0017] Preferably, the disc component is fixedly provided with a nested guide ring and an inner ring;

[0018] The collar is fixedly mounted with a ring edge that slides between the guide ring and the inner ring, and also includes a fixed pulley traction assembly, which is used to keep the collar in relative motion with the drive shaft.

[0019] Preferably, a piston damping block is movably disposed in the boring hole opened at the end of the drive shaft;

[0020] It also includes a telescopic unit, the output end of which is connected to the piston damping block;

[0021] It also includes a stroke detection unit, which cuts off the power supply to the telescopic unit when the piston damping block reaches the end of the boring hole.

[0022] Preferably, the travel detection unit includes:

[0023] An insulating block disposed at the end of the piston damping block;

[0024] A spring seat is provided inside the boring hole to be inserted into the insulating block.

[0025] Preferably, a plurality of buffer springs are fixedly installed on the ring platform on the outer wall of the piston damping block, and sealing rubber rings are respectively provided on the outer wall of the ring platform and the outer wall of the piston damping block.

[0026] Preferably, the welding mechanism includes a welding box rotatably mounted on the outer wall of the guide ring and a drive gear fixedly mounted on the outer wall of the welding box. The output end of the rotary motor fixedly mounted on one side of the outer wall of the disc component is provided with a transmission gear, and the transmission gear and the drive gear mesh with each other.

[0027] In the above technical solution, the automatic welding equipment for steel pipes provided by the present invention has the following beneficial effects: By utilizing multiple flaps arranged in a circumferential array on a disc to rotate and fit against the inner wall of steel pipe a, the disc and steel pipe a are relatively fixed. At the same time, by utilizing multiple support rods arranged in a circumferential array on a collar to rotate, the other end of the support rod abuts against the inner wall of steel pipe b, thereby fixing the collar and steel pipe b. By utilizing a telescopic unit to drive the collar to move radially relative to the disc, steel pipe b and steel pipe a are brought closer to each other, so that the ports on adjacent sides of steel pipe b and steel pipe a are fitted together, thereby achieving rapid alignment of steel pipe b and steel pipe a. At the same time, by utilizing the axial arrangement of the disc and collar to make steel pipe b and steel pipe a coaxially limited, the rapid limiting, movement, coaxiality, and docking and fixing of steel pipe b and steel pipe a are achieved, thereby facilitating subsequent welding of steel pipe b and steel pipe a and saving welding between the inner walls of steel pipe b and steel pipe a. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0029] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0030] Figure 2 This is an enlarged schematic diagram of the arc-shaped channel structure provided in an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the overall cross-sectional structure provided in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the cross-sectional structure of the disk component provided in an embodiment of the present invention;

[0033] Figure 5 This is an enlarged structural diagram of point A provided in an embodiment of the present invention;

[0034] Figure 6 This is an enlarged structural diagram of point B provided in an embodiment of the present invention;

[0035] Figure 7 This is an enlarged structural diagram at point C provided in an embodiment of the present invention;

[0036] Figure 8 This is a schematic cross-sectional view of a disc component provided in an embodiment of the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Tracked walking mechanism; 2. Support rod; 3. Drive shaft; 4. Guide sleeve; 5. Welded box; 6. Collar; 7. Hydraulic push rod; 8. Spring seat; 11. Disc component; 12. Fixed shaft; 13. Guide ring; 14. Inner ring; 15. Slide groove; 16. Ring plate; 21. Return spring; 22. Connecting rod; 23. Sliding block; 24. Auxiliary rod; 25. Lever; 31. Arm; 32. Protrusion; 33. Protrusion 34. Edge; 41. Buffer groove; 42. Arc-shaped track; 43. Horizontal guide groove; 44. Drive disc; 45. Flip plate; 56. Hinge platform; 57. Drive gear; 58. Transmission gear; 59. Rotary motor; 60. Slide rail; 61. Ring edge; 62. Steel rope; 63. Push spring; 64. Main fixed pulley; 65. Moving plate; 76. Piston damping block; 77. Ring platform; 78. Buffer spring; 79. Insulating block. Detailed Implementation

[0039] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] like Figure 1-8 As shown, an automatic welding device for steel pipes includes a disc 11 and a collar 6 arranged along the axial direction.

[0041] The disc component 11 is provided with a circumferential array of multiple flaps 44, which are rotated and flipped to fit against the inner wall of the steel pipe a.

[0042] Multiple support rods 2 are arranged in a circumferential array on the collar 6. The multiple support rods 2 flip so that the other end abuts against the inner wall of the steel pipe b.

[0043] It also includes a telescopic unit, which is used to drive the collar 6 to move radially relative to the disc 11 so that the ends of the steel pipe b and the steel pipe a fit together.

[0044] It also includes a welding mechanism, which includes a welding torch for welding the gaps after bonding.

[0045] Specifically, in the above technical solution, multiple flaps 44 rotate to fit against the inner wall of the steel pipe a. The rotation can be driven by a motor, matching the number of flaps 44, mounted on the hinge shaft of each flap 44, with multiple motors driving each flap 44 to rotate. Alternatively, a motor can engage with a main gear that rotates axially within the disc 11, and auxiliary gears are fixedly mounted on the hinge shaft of each flap 44. The motor drives the main gear, which meshes with multiple auxiliary gears to simultaneously drive multiple flaps. The plate 44 flips and adheres to the inner wall of the steel pipe a; alternatively, multiple guide posts sliding within the disc 11 can be used, with each guide post matching the flip plate 44 and the guide posts located on one side of the flip plate 44. The flip plates 44 are respectively hinged to the outer wall of the disc 11. The guide posts are hydraulically driven to slide and push the flip plates 44 to flip, thereby allowing the flip plates 44 to flip and adhere to the inner wall of the steel pipe a, thus fixing the disc 11 to the steel pipe a. Alternatively, any method known to those skilled in the art for driving the flip plates 44 to flip is acceptable.

[0046] Furthermore, multiple support rods 2 are flipped so that the other end of the support rod 2 abuts against the inner wall of the steel pipe b. The support rod 2 can be flipped by using multiple motors matched with the support rod 2, and a wedge gear is fixedly installed at one end of the hinge shaft of the support rod 2. The wedge gear fixedly installed at the output end of the motor meshes with the wedge gear on the hinge shaft of the support rod 2 to drive the support rod 2 to flip along the outer wall of the collar 6. Alternatively, the first end of the electric push rod is hinged to the outer wall of the collar 6, and the output end of the electric push rod, i.e., the second end, is hinged to the outer wall of one side of the support rod 2, and the electric push rod pushes the support rod 2 to flip. Or any method known to those skilled in the art for driving the support rod 2 to flip is acceptable.

[0047] Furthermore, in order to drive the disc component 11 and the collar 6 to move along the inner wall of steel pipe a and the inner wall of steel pipe b, a tracked walking mechanism 1 is provided. The tracked walking mechanism 1 moves and drives the flap 44 and the support rod 2 to the predetermined work location. The tracked walking mechanism 1 mentioned above is existing technology and will not be described in detail.

[0048] Secondly, the telescopic unit in the embodiment that drives the collar 6 to move radially relative to the disc 11 to make the ends of steel pipe b and steel pipe a fit together can be an electric push rod fixedly installed on the disc 11, with the output end of the electric push rod fixedly installed on the collar 6. When multiple flaps 44 and multiple support rods 2 are respectively fixed to the inner walls of steel pipe a and steel pipe b, the extension of the electric push rod drives the collar 6 to move radially relative to the disc 11 and approach it, so that the ends of steel pipe b and steel pipe a can fit together for subsequent welding. Alternatively, it can be a screw axially rotatably installed on the disc 11, with the collar 6 threadedly rotatably installed on the screw and sliding on the disc 11. The output end of a motor fixedly installed on the disc 11 is fixedly installed on the first end of the screw, so that the motor drives the screw to rotate, thereby causing the collar 6 to be threadedly rotatably installed on the screw and approach the disc 11. Or any method known to those skilled in the art for driving the collar 6 to move radially relative to the disc 11 is acceptable.

[0049] It should be noted that the welding mechanism in the above embodiment includes a guide ring 13 fixedly installed on the outer wall of one side of the disc component 11 and a welding box 5 rotatably disposed on the outer wall of the guide ring 13. A welding torch for gap welding and a drive gear 51 fixedly installed on the outer wall of the welding box 5 are provided on the welding box 5. A rotary motor 53 is fixedly installed on the outer wall of one side of the disc component 11, and a transmission gear 52 is fixedly installed at the output end of the rotary motor 53. The transmission gear 52 and the drive gear 51 mesh, thereby using the rotary motor 53 to drive the welding box 5 to rotate on the guide ring 13, so that the welding torch on the welding box 5 rotates with the welding box 5 to weld the gap where the ends of steel pipe b and steel pipe a are attached. The corresponding equipment for the welding torch provided in the welding box 5 is common knowledge to those skilled in the art and will not be described in detail here.

[0050] Furthermore, in order to make the ends of the flap 44 and the support rod 2 fit more tightly against the inner walls of steel pipe a and steel pipe b, corresponding anti-slip rubber pads are fixedly installed at the ends of the flap 44 and the support rod 2, respectively. When the ends of the flap 44 and the support rod 2 approach the inner walls of steel pipe a and steel pipe b, respectively, the anti-slip rubber pads are deformed under pressure, so that the flap 44 and the support rod 2 are pushed more stably against steel pipe a and steel pipe b.

[0051] In the above technology, multiple flaps 44 arranged in a circumferential array on the disc component 11 are flipped to fit against the inner wall of the steel pipe a, thereby fixing the disc component 11 and the steel pipe a relatively. At the same time, multiple support rods 2 arranged in a circumferential array on the collar 6 are flipped so that the other end of the support rod 2 abuts against the inner wall of the steel pipe b, thereby fixing the collar 6 and the steel pipe b relatively. By using a telescopic unit to drive the collar 6 to move radially relative to the disc component 11, the steel pipe b and the steel pipe a are brought closer to each other, so that the ports on the adjacent sides of the steel pipe b and the steel pipe a are fitted together, thereby achieving rapid alignment of the steel pipe b and the steel pipe a. At the same time, the axial arrangement of the disc component 11 and the collar 6 allows the steel pipe b and the steel pipe a to be coaxially limited, thereby achieving rapid limiting, movement, coaxiality, and docking and fixing of the steel pipe b and the steel pipe a, which facilitates subsequent welding of the steel pipe b and the steel pipe a and saves welding between the inner walls of the steel pipe b and the steel pipe a.

[0052] As a further embodiment of the present invention, a drive disk 43 rotatably connected to the flip plate 44 is rotatably disposed inside the disc component 11, and a fixed shaft 12 is disposed on the disc component 11 and arranged in the waist groove opened on the flip plate 44.

[0053] Specifically, the drive disc 43, which is axially rotated on the disc component 11, has multiple hinges 45 arranged in an array on the outer wall of the drive disc 43, so that the flaps 44 are respectively hinged on the hinges 45. The outer wall of the disc component 11 has a circular array of movable slots, and the fixed shaft 12 is fixedly installed on the inner wall of the movable slots. Thus, the flaps 44 can be flipped along the movable slots to support the inner wall of the steel pipe a, or flipped and stored in the movable slots.

[0054] Furthermore, by moving the disc component 11 to a predetermined position and positioning the welding gun port on the welding box 5 toward the end of the steel pipe a, when the drive disc 43 is driven to rotate, it causes multiple flaps 44 to flip. The fixed shaft 12 is movably positioned in the waist groove opened on the flap 44, thereby bringing the second end of the flap 44 close to the inner wall of the steel pipe a. The support of the multiple flaps 44 keeps the disc component 11 and the steel pipe a fixed, so that the disc component 11 can be stably positioned inside the steel pipe a. By rotating the drive disc 43 in the opposite direction, the drive disc 43 can flip the flaps 44 again and store them in the movable groove, thereby avoiding the problem that the flaps 44 are exposed on the outer wall of the disc component 11 when not in use, and that the flaps 44 cannot be tightly attached to the inner wall of the steel pipe a due to bending caused by impact.

[0055] The drive disk 43 can be driven to rotate on the disc 11 by means of a motor fixedly mounted on the disc 11, with a gear fixedly mounted on the output end of the motor meshing with a gear fixedly mounted on the drive disk 43 to drive the drive disk 43 to rotate; or by means of an electric push rod fixedly mounted on the disc 11, with a rack fixedly mounted on the output end of the electric push rod, and a gear fixedly mounted on the outer wall of the drive disk 43 along one side of the shaft, the electric push rod drives the rack to move and mesh with the gear, thereby driving the drive disk 43 to rotate to drive the flip plate 44 to flip; or any other means known to those skilled in the art to drive the drive disk 43 to rotate.

[0056] As the preferred embodiment provided by the present invention, a guide sleeve 4 with an arc-shaped track 41 on the surface is provided on the outer wall of one side of the drive disk 43;

[0057] It also includes a radially movable arm 31, which slides in conjunction with the arc-shaped track 41.

[0058] Specifically, when the arm 31, which moves radially along the disc 11, is driven to move to one side of the disc 11, the symmetrically arranged protrusions 32 on the arm 31 slide along the arc-shaped channel 41, thereby driving the guide sleeve 4 to rotate on the disc 11. When the guide sleeve 4 rotates, the drive disc 43 is driven to rotate, causing the flip plate 44 to flip. The fixed shafts 12 are respectively movably arranged in the waist grooves opened on the flip plate 44, thereby causing the second end of the flip plate 44 to approach the inner wall of the steel pipe a. When the arm 31 is driven to move again, causing the protrusions 32 to slide back to their original position along the arc-shaped channel 41, the guide sleeve 4 rotates in the opposite direction again, causing the drive disc 43 to rotate in the opposite direction. The drive disc 43 then flips the flip plate 44 again and stores it in the movable slot, thus avoiding the problem that the flip plate 44 is exposed on the outer wall of the disc 11 when not in use, and is bent due to impact, which prevents the flip plate 44 from tightly fitting the inner wall of the steel pipe a.

[0059] The arm 31 can be driven to move radially along the disc 11 by being pushed by an electric push rod to move horizontally and make the protrusion 32 slide along the arc track 41; it can also be driven by a motor in conjunction with a gear rack to move the arm 31; or it can be driven by any method known to those skilled in the art to move the arm 31 radially along the disc 11.

[0060] As another embodiment of the present invention, the outer wall of the collar 6 is slidably provided with a slider 23, and the first end of the connecting rod 22 hinged on the slider 23 is hinged to the support rod 2.

[0061] Specifically, multiple slides 61 are arranged in a circumferential array on the outer wall of the collar 6, and the sliders 23 are respectively slidably disposed in the slides 61. When the multiple sliders 23 are driven to slide, the connecting rod 22 is used to drive the support rod 2 to flip, so that the other end of the support rod 2 abuts against the inner wall of the steel pipe b. With the support of the multiple support rods 2, the collar 6 and the support rod 2 are relatively fixed. When the multiple sliders 23 are driven to slide again, the connecting rod 22 pulls the support rod 2 to flip and the end of the support rod 2 is separated from the inner wall of the steel pipe b. At this time, the support rod 2 is released from fixing the steel pipe b.

[0062] The sliding of slider 23 can be achieved by an electric push rod fixedly installed on collar 6 and a push ring slidably set on collar 6. The electric push rod pushes the push ring to push multiple sliders 23 simultaneously, thereby driving multiple support rods 2 to rotate synchronously. When slider 23 slides on the outer wall of collar 6 and is located between support rod 2 and disc 11, the sliding of slider 23 can cause the ends of multiple support rods 2 to open towards the disc 11. When slider 23 slides on the outer wall of collar 6 and is located on the side of support rod 2 opposite to disc 11, the sliding of slider 23 can cause the ends of multiple support rods 2 to open towards the disc 11.

[0063] As the preferred embodiment provided by the present invention, the inner wall of the collar 6 is hinged with a plurality of levers 25, and the first end of the auxiliary rod 24 hinged on the lever 25 is hinged to the slider 23.

[0064] It also includes a drive shaft 3 that moves radially, and a lever 25 is located on the path of the drive shaft 3.

[0065] Specifically, the drive shaft 3 is slidably mounted on the tracked walking mechanism 1. The tracked walking mechanism 1 includes at least one support housing. The drive shaft 3 is slidably mounted on the support housing. Meanwhile, the disc component 11 is fixedly mounted on the support housing of the tracked walking mechanism 1 by multiple fixing rods. The arm 31 is symmetrically fixedly mounted on the outer wall of the drive shaft 3. Furthermore, multiple levers 25 are hinged on the inner wall of the collar 6, with their inclined sides facing the end of the drive shaft 3.

[0066] By using the tracked walking mechanism 1 to drive the disc component 11 to move and move the disc component 11 to a predetermined position, and with the welding gun port on the welding box 5 facing the end of the steel pipe a, when the drive shaft 3 is driven to move towards the disc component 11, the protrusion 32 on the arm 31 slides along the arc track 41, thereby driving the guide sleeve 4 to rotate on the disc component 11. When the guide sleeve 4 rotates, the drive disk 43 is driven to rotate, thereby driving the flip plate 44 to flip, and the fixed shaft 12 is respectively movably set in the waist groove opened on the flip plate 44, thereby making the second end of the flip plate 44 close to the inner wall of the steel pipe a. By flipping multiple flip plates 44, their ends are attached to the inner wall of the steel pipe a for support, thereby fixing the position of the disc component 11 and the steel pipe a relatively. When the protrusion 32 slides along the arc-shaped track 41, the end of the drive shaft 3 slides on multiple levers 25, thereby driving the levers 25 to rotate and approach the inner wall of the collar 6. When the levers 25 rotate, the sliders 23 slide in the slide rail 61. When the multiple sliders 23 are driven to slide, the connecting rod 22 drives the support rods 2 to rotate, causing the other end of the support rods 2 to abut against the inner wall of the steel pipe b. Thus, when the flap 44 stops rotating and abuts against the inner wall of the steel pipe a, the support rods 2 also stop rotating and the end of the support rods 2 abuts against the inner wall of the steel pipe b. Thus, the driven movement of the drive shaft 3 simultaneously drives the disc 11 and the steel pipe a to be relatively fixed in position and supports the multiple support rods 2. The collar 6 and the support rod 2 are relatively fixed. When steel pipe a and steel pipe b are relatively fixed by the support of the flap 44 and the support rod 2, and the disc 11 and the collar 6, the ends of steel pipe a and steel pipe b can be fitted and connected by the collar 6 and the disc 11 approaching each other. At the same time, the coaxiality of the collar 6 and the disc 11 also ensures the precise alignment of steel pipe a and steel pipe b. After steel pipe a and steel pipe b are welded, the drive shaft 3 is driven to move away from the disc 11. At this time, the protrusion 32 slides back to its original position along the two arc-shaped tracks 41. At this time, the guide sleeve 4 rotates on the disc 11 again, and the drive disc 43 is driven to rotate again to drive the flap 44 to flip. The fixed shaft 12 is movably set on the flap 44. Inside the waist groove, the second end of the flap 44 moves away from the inner wall of the steel pipe a, and the drive disc 43 flips the flap 44 again to store it in the movable groove, thus preventing the flap 44 from being exposed on the outer wall of the disc 11 when not in use and from being bent by impact. At the same time, when the protrusion 32 slides back to its original position along the two arc tracks 41, the drive shaft 3 gradually disengages from the lever 25. At this time, the return springs 21, which are fixedly installed on the support rod 2, are used to flip the support rod 2 and disengage it from the inner wall of the steel pipe b, thereby releasing the support and fixation of the steel pipe b. By quickly releasing the fixation of the steel pipe a and the steel pipe b, the welding efficiency of the steel pipe is improved.

[0067] Furthermore, the drive shaft 3 can be driven by a motor fixedly mounted on the support housing of the tracked walking mechanism 1, which works in conjunction with a screw to rotate the drive shaft 3 and the screw thread. When the motor drives the screw to rotate, the drive shaft 3 slides on the support housing of the tracked walking mechanism 1. Alternatively, the drive shaft 3 can be driven by a motor and a gear working in conjunction with a rack fixedly mounted on the drive shaft 3, which drives the gear and rack to mesh, thereby causing the drive shaft 3 to slide on the support housing of the tracked walking mechanism 1. Or any method known to those skilled in the art for driving the drive shaft 3 to slide is acceptable.

[0068] As the preferred embodiment provided by the present invention, a nested guide ring 13 and an inner ring 14 are fixedly provided on the disc component 11;

[0069] The collar 6 is fixedly mounted with a ring edge 62 that slides between the guide ring 13 and the inner ring 14, and also includes a fixed pulley traction assembly, which is used to keep the collar 6 in relative motion with the drive shaft 3.

[0070] Specifically, the guide ring 13 and the inner ring 14 are respectively fixedly installed on the outer wall of one side of the disc component 11. The guide ring 13 is sleeved on the outer wall of the inner ring 14, and the ring edge 62 at the first end of the collar 6 is slidably disposed in the gap between the guide ring 13 and the inner ring 14. For the fixed pulley traction assembly, it includes a ring plate 16 fixedly installed between the guide ring 13 and the inner ring 14, with multiple perforations arrayed on the ring plate 16. Multiple sliding grooves 15 are formed on the inner ring 14, and movable plates 66 are slidably disposed within the sliding grooves 15. Steel ropes 63 are fixedly connected to the movable plates 66 and the ring edge 62. The fixed pulley traction assembly also includes multiple main fixed pulleys 65, which are axially rotatably disposed on the inner ring 14 and movable within the sliding grooves 15. The steel ropes 63 are distributed... Do not pass through the perforation opened on the ring plate 16, and the steel rope 63 is respectively wound around the main fixed pulley 65. The outer wall of the steel rope 63 is fitted with a push spring 64. The first end of the push spring 64 is fixedly installed on the ring edge 62, and the second end of the push spring 64 is fixedly installed on the ring plate 16. The push spring 64 pushes the ring edge 62 so that the ring edge 62 fits against the stop edge at one end of the guide ring 13. It can be seen that the outer wall of the guide sleeve 4 and one end of the arc-shaped channel 41 are respectively connected to the horizontal guide groove 42. At the same time, the outer wall of the drive shaft 3 is provided with a protrusion 33. When the drive shaft 3 is driven to move towards the disc part 11, the protrusions 32 on the two arms 31 slide along the two arc-shaped channels 41 respectively, thereby driving the guide sleeve 4 to rotate on the disc part 11. When the guide sleeve 4 rotates, the drive disc 43 is driven to rotate, causing the flap 44 to flip. The fixed shaft 12 is movably installed in the groove on the flap 44, so that the second end of the flap 44 approaches the inner wall of the steel pipe a. By flipping multiple flaps 44, their ends are attached to the inner wall of the steel pipe a for support, thus fixing the position of the disc 11 and the steel pipe a. At the same time, when the protrusion 32 slides along the arc track 41, the end of the drive shaft 3 slides on multiple levers 25, thereby driving the levers 25 to flip and approach the inner wall of the collar 6. When the levers 25 flip, the auxiliary rod 24 is used to make the sliders 23 slide in the slide rail 61. When multiple sliders 23 are driven to slide, the connecting rod 22 is used to drive the support. The lever 2 flips, causing the other end of the support rod 2 to abut against the inner wall of the steel pipe b. It is known that when the protrusion 32 is fully moved to the end of the arc-shaped channel 41 and the connection point of one end of the horizontal guide groove 42, the first end of the lever 25 is attached to the outer wall of the drive shaft 3, and the other end of the support rod 2 abuts against the inner wall of the steel pipe b. Simultaneously, the drive disc 43 stops rotating, and the second end of the flip plate 44 approaches the inner wall of the steel pipe a. This fixes the relative positions of the disc 11 and the steel pipe a, and the support of multiple support rods 2 ensures that the collar 6 and the support rod 2 are relatively fixed. Furthermore, as the drive shaft 3 continues to move under its drive, the protrusion 32 slides along the horizontal guide groove 42, and the protruding edge 33 abuts against the moving plate 66. As the drive shaft 3 continues to move under its drive...The protruding edge 33 drives the moving plate 66 to slide within the groove 15. At this time, the steel rope 63 moves on the main fixed pulley 65 and inside the hole, and the steel rope 63 pulls the ring edge 62 to slide between the guide ring 13 and the inner ring 14. Since the first end of the lever 25 is in contact with the outer wall of the drive shaft 3, the included angle between the lever 25 and the auxiliary rod 24 is fixed. At the same time, the slider 23 stops sliding to cooperate with the connecting rod 22 to keep the support rod 2 in a flipped state that is in contact with the inner wall of the steel pipe b, and then slides on the ring edge 62 on the collar 6. When there is a gap between the guide ring 13 and the inner ring 14, the first end of the lever 25 slides against the outer wall of the drive shaft 3. Simultaneously, the support rod 2 supports and fixes the steel pipe b, allowing it to approach the steel pipe a along with the collar 6. This ensures that the collar 6 and the disc 11 remain coaxial, allowing adjacent ends of the steel pipe a and steel pipe b to come closer together. This achieves rapid fixing, moving, and alignment of the steel pipe a and steel pipe b. Furthermore, as the steel pipe a and steel pipe b approach each other, the drive shaft 3 moves within the collar 6, and the collar 6 maintains relative movement with the drive shaft 3.

[0071] As another embodiment of the present invention, a piston damping block 71 is movably disposed in the boring hole opened at the end of the drive shaft 3;

[0072] It also includes a telescopic unit, the output end of which is connected to the piston damping block 71;

[0073] It also includes a stroke detection unit, which cuts off the power supply to the telescopic unit when the piston damping block 71 travels to the end of the boring hole.

[0074] Specifically, the telescopic unit is a hydraulic push rod 7 fixedly installed on the support housing of the tracked walking mechanism 1, and the output end of the hydraulic push rod 7 is fixedly installed on the piston damping block 71. At the same time, when the hydraulic push rod 7 drives the drive shaft 3 to slide on the support housing of the tracked walking mechanism 1 and approach the disc part 11, the flap 44 and the support rod 2 are flipped to fix the position of the disc part 11 and the steel pipe a and the relative fixation between the collar 6 and the support rod 2. At the same time, under the pull of the steel rope 63 on the ring edge 62, the adjacent ends of the steel pipe a and the steel pipe b are brought closer together. When the adjacent ends of the steel pipe a and the steel pipe b are completely together, the power supply of the hydraulic push rod 7 of the telescopic unit is cut off when the piston damping block 71 moves to the end of the boring hole through the stroke detection unit, so that the ends of the steel pipe a and the steel pipe b remain together, while the flap 44 and the support rod 2 remain flipped and supported.

[0075] The stroke detection unit can be detected in the following ways: First, a pressure sensor can be installed at one end of the piston damping block 71. Under the pushing action of the hydraulic push rod 7, the pressure sensor and the pressure generated by the inner wall of the boring end, in conjunction with a corresponding control circuit board, can cut off the power supply to the hydraulic push rod 7, thereby detecting the stroke of the piston damping block 71. Second, a laser rangefinder or similar device can be used. When the distance between the piston damping block 71 and the inner wall of the boring end reaches a predetermined distance under the pushing action of the hydraulic push rod 7, the power supply to the hydraulic push rod 7 can be cut off in conjunction with a corresponding sensing circuit, thereby detecting the stroke of the piston damping block 71. Alternatively, any stroke detection method known to those skilled in the art is acceptable. The pressure sensor, control circuit board, laser rangefinder, and sensing circuit are common knowledge to those skilled in the art and will not be described in detail here.

[0076] As another embodiment of the present invention, the stroke detection unit includes:

[0077] An insulating block 74 is disposed at the end of the piston damping block 71;

[0078] A spring seat 8 is provided inside the boring hole to be inserted into the insulating block 74.

[0079] Specifically, in order to cut off the power supply to the hydraulic push rod 7 and stop its pushing when the piston damping block 71 reaches the end of the boring hole, an insulating block 74 is provided at the end of the piston damping block 71. When the piston damping block 71 reaches the end of the boring hole, the insulating block 74 can be inserted into the spring seat 8, thereby separating the two elastic electrode plates symmetrically arranged on the spring seat 8, thus cutting off the power supply to the hydraulic push rod 7.

[0080] As a further preferred embodiment of the present invention, a plurality of buffer springs 73 are fixedly installed on the annular platform 72 provided on the outer wall of the piston damping block 71, and sealing rubber rings are respectively provided on the outer wall of the annular platform 72 and the outer wall of the piston damping block 71.

[0081] Specifically, in order to buffer the push of the hydraulic push rod 7 of the telescopic unit after the ends of steel pipe a and steel pipe b are properly fitted, a buffer groove 34 is movably set on the inner wall of one side of the boring hole through the ring platform 72, and the first end of the buffer spring 73 is fixedly installed on the inner wall of one side of the buffer groove 34. When the hydraulic push rod 7 drives the drive shaft 3 to slide on the support housing of the tracked walking mechanism 1 and approach the disc component 11, the protrusions 32 on the two arms 31 slide along the two arc-shaped tracks 41 respectively, thereby driving the guide sleeve 4 to rotate on the disc component 11. When the guide sleeve 4 rotates, the drive disc 43 is driven to rotate to drive the flip plate 44 to flip, and the fixed shaft 12 is movably set in the waist groove opened on the flip plate 44, thereby making the second end of the flip plate 44 approach the inner wall of the steel pipe a. Through the flipping of multiple flip plates 44, their ends are attached to the inner wall of the steel pipe a for support, thereby fixing the position of the disc component 11 and the steel pipe a relatively. At the same time, when the protrusions 32 slide along the arc-shaped tracks 41, At this time, the end of the drive shaft 3 slides on multiple levers 25, thereby driving the levers 25 to rotate and approach the inner wall of the collar 6. When the levers 25 rotate, the auxiliary rod 24 cooperates to make the sliders 23 slide in the slide rail 61. When the multiple sliders 23 are driven to slide, the connecting rod 22 cooperates to drive the support rods 2 to rotate, thereby making the other end of the support rods 2 abut against the inner wall of the steel pipe b. It can be seen that when the protrusion 32 moves completely to the end of the arc track 41 and the connection point of one end of the horizontal guide groove 42, the first end of the lever 25 is attached to the outer wall of the drive shaft 3, the other end of the support rod 2 abuts against the inner wall of the steel pipe b, and the drive disc 43 stops rotating. Furthermore, the second end of the flap 44 is close to the inner wall of the steel pipe a, thereby fixing the position of the disc 11 and the steel pipe a, and the support of multiple support rods 2 to fix the collar 6 and the support rods 2. Further, as the drive shaft 3 continues to be pushed and moved by the hydraulic push rod 7, the protrusion 32 slides along the horizontal guide groove 42, and the protrusion 33 is attached to the moving plate 66. As the drive shaft 3 continues to be driven, the protrusion 33 drives the moving plate 66 to slide in the slide groove 15. At this time, the steel rope 63 moves on the main fixed pulley 65 and in the through hole, and the steel rope 63 pulls the ring edge 62 to slide in the gap between the guide ring 13 and the inner ring 14. Due to the lever 2 The first end of lever 25 is attached to the outer wall of drive shaft 3. At this time, the included angle between lever 25 and auxiliary rod 24 is fixed. Simultaneously, slider 23 stops sliding to cooperate with connecting rod 22 so that support rod 2 remains in a state of flipped attachment to the inner wall of steel pipe b. Then, when the ring edge 62 on collar 6 slides in the gap between guide ring 13 and inner ring 14, the first end of lever 25 slides to the outer wall of drive shaft 3. At the same time, support rod 2 supports and fixes steel pipe b so that it moves closer to steel pipe a with collar 6. Then, with collar 6 and disc 11 remaining coaxial, adjacent ends of steel pipe a and steel pipe b are brought closer together. After the ends of steel pipe a and steel pipe b are fully attached, hydraulic push rod 7 continues to push drive shaft 3.At this time, the convex edge 33 pushes the moving plate 66. Because the ends of steel pipe a and steel pipe b remain in contact, the ring edge 62 can no longer move in the gap between the guide ring 13 and the inner ring 14. Therefore, the force of the hydraulic push rod 7 pushing the drive shaft 3 is transmitted to the piston damping block 71. At the same time, the piston damping block 71 slides in the boring hole. At this time, the buffer spring 73 pulls the ring platform 72 to achieve buffering of the piston damping block 71. With the cooperation of the sealing rubber rings respectively set on the outer wall of the ring platform 72 and the outer wall of the piston damping block 71, a sealing cavity is formed between the ring platform 72 on the side of the buffer spring 73 and the inner wall of the buffer groove 34. As the ring platform 72 moves toward the spring seat 8, the sealing cavity forms a negative pressure cavity. The traction of the negative pressure cavity reduces the impact of the negative pressure cavity. The hydraulic push rod 7 has a pushing force and pushing speed, and under the continued pushing of the hydraulic push rod 7, the insulating block 74 is inserted into the spring seat 8, thereby separating the two elastic electrode plates symmetrically arranged on the spring seat 8, thus cutting off the power supply to the hydraulic push rod 7. At this time, the ends of steel pipe a and steel pipe b remain in contact, while the flip plate 44 and the support rod 2 continue to flip and support steel pipe a and steel pipe b. Further, by using the rotary motor 53 to drive the transmission gear 52 to rotate, the transmission gear 52 and the drive gear 51 mesh, and then the rotary motor 53 drives the welding box 5 to rotate on the guide ring 13, so that the welding gun on the welding box 5 rotates with the welding box 5 to weld the gap where the ends of steel pipe b and steel pipe a are in contact. After the welding is completed, By restarting the hydraulic push rod 7 and pulling the drive shaft 3 towards the support housing side of the tracked walking mechanism 1, the protrusion 32 retracts along the horizontal guide groove 42 into the two arc-shaped tracks 41 and slides along the arc-shaped tracks 41 to reset the position of the protrusion 32. At this time, the guide sleeve 4 rotates on the disc part 11 again, and the drive disc 43 is driven to rotate again to drive the flip plate 44 to flip. The fixed shaft 12 is movably set in the waist groove opened on the flip plate 44, so that the second end of the flip plate 44 moves away from the inner wall of the steel pipe a. At the same time, when the protrusion 32 retracts along the horizontal guide groove 42 into the two arc-shaped tracks 41, the drive shaft 3 gradually disengages from the lever 25. A return spring 21 is fixedly installed on the support rod 2, with its first end fixedly installed on the collar 6. The return spring 21 is used to flip the support rod 2 and disengage it from the inner wall of the steel pipe b, thus releasing the support and fixation of the steel pipe b. Simultaneously, the flipping of the support rod 2 allows the connecting rod 22 to drive the slider 23 to slide again, causing the lever 25 to flip and reset. Furthermore, the movement of the drive shaft 3 allows the insulating block 74 to disengage from the spring seat 8, causing the two symmetrically arranged elastic electrode plates on the spring seat 8 to come into contact. At the same time, the push spring 64 releases its stored force to push the ring edge 62, causing the ring edge 62 to come into contact with the retaining edge at one end of the guide ring 13, thereby resetting the position of the collar 6. At this point, the crawler-type walking mechanism 1 can move again. How the hydraulic push rod 7 achieves circuit closure, switching, and control of opening and closing is common knowledge to those skilled in the art and will not be elaborated here.

[0082] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic welding device for steel pipes, characterized in that, Includes a disc component (11) and a collar (6) arranged along the axial direction; The disc component (11) is provided with a circumferential array of multiple flaps (44), and the multiple flaps (44) are flipped to fit against the inner wall of the steel pipe a. The collar (6) is rotatably arranged with multiple support rods (2) in a circular array. The multiple support rods (2) are flipped so that the other end abuts against the inner wall of the steel pipe b. It also includes a telescopic unit for driving the collar (6) to move radially relative to the disc (11) so that the ends of the steel pipe b and the steel pipe a are in contact; It also includes a welding mechanism, which includes a welding torch for welding the gaps after bonding; The disc component (11) is rotatably provided with a drive disc (43) that is rotatably connected to the flap (44). The outer wall of one side of the drive disk (43) is provided with a guide sleeve (4) with an arc-shaped channel (41) on its surface. It also includes a radially movable arm (31), and the arm (31) slides in conjunction with the arc-shaped track (41); The inner wall of the collar (6) is hinged with a plurality of levers (25), and also includes a drive shaft (3) that moves radially, with the levers (25) located on the path of the drive shaft (3); The ends of the drive shaft (3) slide on multiple levers (25) respectively, thereby driving the levers (25) to flip and approach the inner wall of the collar (6); A piston damping block (71) is movably disposed in the boring hole opened at the end of the drive shaft (3). It also includes a telescopic unit, the output end of which is connected to the piston damping block (71); it also includes a stroke detection unit, which is used to cut off the power supply to the telescopic unit when the piston damping block (71) reaches the end of the boring hole; The stroke detection unit includes: An insulating block (74) is disposed at the end of the piston damping block (71). The boring hole is provided with a spring seat (8) that is inserted into the insulating block (74); Multiple buffer springs (73) are fixedly installed on the ring platform (72) provided on the outer wall of the piston damping block (71), and sealing rubber rings are respectively provided on the outer wall of the ring platform (72) and the outer wall of the piston damping block (71). The outer wall of the collar (6) is slidably provided with a slider (23), and the first end of the connecting rod (22) hinged on the slider (23) is hinged on the support rod (2); The first end of the auxiliary rod (24) hinged to the lever (25) is hinged to the slider (23).

2. The automatic welding equipment for steel pipes according to claim 1, characterized in that, The disc component (11) is provided with a fixed shaft (12) arranged in a groove on the flap (44).

3. The automatic welding equipment for steel pipes according to claim 1, characterized in that, The disc component (11) is fixedly provided with a nested guide ring (13) and an inner ring (14). The collar (6) is fixedly mounted with a ring edge (62) that slides between the guide ring (13) and the inner ring (14), and also includes a fixed pulley traction assembly, which is used to keep the collar (6) and the drive shaft (3) in relative motion.

4. The automatic welding equipment for steel pipes according to claim 1, characterized in that, The welding mechanism includes a welding box (5) rotatably mounted on the outer wall of the guide ring (13) and a drive gear (51) fixedly mounted on the outer wall of the welding box (5). The output end of the rotary motor (53) fixedly mounted on one side of the outer wall of the disc (11) is provided with a transmission gear (52), and the transmission gear (52) and the drive gear (51) mesh with each other.

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