A heavy steel structure welding device

Through the cooperation of self-propelled components and guide components, continuous solder supply and welding torch shaking of non-cylindrical steel structures are achieved, which solves the limitations in the welding process of heavy steel structures and improves the welding effect at the welds.

CN120002269BActive Publication Date: 2025-08-05JIANGSU NANTE HEAVY IND TECHNOLOGY CO LTD
View PDF 3 Cites 0 Cited by

Patent Information

Application Number
CN202510446085.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-04-10
Publication Date
2025-08-05
Estimated Expiration
2045-04-10

AI Technical Summary

Technical Problem

In the prior art, when welding cylindrical steel structures and non-cylindrical steel structures, rotary welding cannot be used, resulting in low welding efficiency.

Method used

The self-propelled assembly is used to move in a direction along the outside of the welding body locked by the fastening belt. The guide assembly drives the solder strip to continuously move by friction with the weld seam of the welding body, and drives the welding gun to tremble horizontally through the shaking assembly to achieve continuous feeding and welding at the weld seam.

Benefits of technology

The limitations of the inability to rotate welding of heavy steel structures are solved, and the continuity and efficiency of welding at the welds are improved.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN120002269B_ABST
    Figure CN120002269B_ABST
Patent Text Reader

Abstract

The present invention discloses a heavy steel structure welding device, including a welding body, a fastening belt provided on the welding body; also including a self-propelled component, which is arranged on the welding body through the fastening belt; also including a hydraulic component and a driving component; the self-propelled component is driven by the hydraulic component to drive the lower transmission connection driving component, and the driving component drives the self-propelled component to move along the welding body; also including a transmission component, the transmission component is transmission-connected to the guide component, the guide component is transmission-connected to the shaking component, and the transmission component drives the guide component to move against the welding seam in a directional manner and transmits the solder strip to feed continuously; also including a shaking component, the shaking component drives the welding gun to shake through the guide component; in the present invention, the limitation that heavy steel structures cannot rotate for welding is solved by the self-propelled component, the guide component cooperates with the shaking component to effectively solve the continuity problem in the solder welding process, and improves the welding effect at the weld seam by shaking.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure welding, in particular to a heavy steel structure welding device. Background Art

[0002] With the rapid development of the economy, my country's infrastructure construction has developed faster and faster. In infrastructure construction, a large number of steel structures are used. Steel structures are mainly composed of steel beams, steel columns, steel trusses and other components made of steel sections and steel plates. Welding is inevitably required between each component or part.

[0003] For example, the patent with publication number CN117047365A, named "Steel Structure Welding Device", and authorization announcement date is November 24, 2023, which includes a base, a fixed support plate, a movable support plate, a clamping support plate, a clamping assembly, a flip motor, a flip gear, an adjustment assembly, a moving assembly, a welding bracket, a hydraulic push rod and a welding machine, the fixed support plate is fixed above one end of the base, the movable support plate is slidably arranged above the end of the base away from the fixed support plate, and two clamping support plates are provided, and the two clamping support plates are respectively rotated and arranged on one side of the fixed support plate and the movable support plate close to the center of the base, and the clamping assembly is fixed on one side of the clamping support plate; it belongs to the field of steel structure welding technology, and specifically provides a universal adjustment of the position of the movable support plate to clamp steel structure components of different lengths, improve the practicality of the welding device, rotate the clamping assembly to flip the tempered structure components, and facilitate welding of various surfaces of the steel structure.

[0004] The shortcoming of the existing technology is that, in actual use, the same cylindrical steel structure can be welded by rotation welding, but when a cylindrical steel structure is welded to a non-cylindrical steel structure, rotation welding cannot be used. In this state, welding will be limited, resulting in low welding efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a heavy steel structure welding device, which uses a self-propelled component to move in a directional manner along the outer side of the welding body locked by a fastening belt, and the guide component drives the solder strip to move continuously by friction with the weld seam of the welding body, thereby continuously feeding the weld seam. At the same time, the shaking component drives the welding gun to shake back and forth horizontally through the guide component, thereby improving the welding effect at the weld seam. This device solves the limitation that heavy steel structures cannot be rotated for welding through the self-propelled component. The guide component cooperates with the shaking component to effectively solve the problem of continuity in the solder welding process, and improves the welding effect at the weld seam through shaking.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solutions: A heavy steel structure welding device includes a welding body, a fastening belt provided on the welding body; a self-propelled assembly, which is arranged on the welding body through the fastening belt; a hydraulic assembly and a drive assembly; the self-propelled assembly is driven by the hydraulic assembly to be connected to the drive assembly, and the drive assembly drives the self-propelled assembly to move along the welding body; the self-propelled assembly also includes a transmission assembly, the transmission assembly is connected to the guide assembly, and the guide assembly is connected to the shaking assembly, and the transmission assembly drives the guide assembly to move against the welding seam in a directional manner and transmits the continuous feeding of the welding strip; the self-propelled assembly also includes a shaking assembly, and the shaking assembly drives the welding gun to shake through the guide assembly;

[0007] As a further description of the above technical solution:

[0008] The self-propelled component includes a rectangular frame, support arms are symmetrically provided at both ends of the rectangular frame, a gear block is provided at one end of the support arm close to the rectangular frame, and a roller is provided at the bottom end of the support arm, and the roller is adapted to the fastening belt.

[0009] As a further description of the above technical solution:

[0010] The hydraulic assembly includes a hydraulic pump, a support seat is provided at the bottom end of the hydraulic pump, and the support seat is fixed on a rectangular frame, a connecting plate is provided at the top end of the hydraulic pump, a rotating shaft is provided at the bottom end of the connecting plate, a tensioning wheel is provided outside the rotating shaft, and a transmission bar is provided on the rotating shaft passing through the connecting plate.

[0011] As a further description of the above technical solution:

[0012] The transmission bar includes a directional bar, and the directional bar is arranged on the rotating shaft. The two ends of the directional bar are symmetrically provided with convex tooth blocks, and the convex tooth blocks are engaged with the gear blocks. One end of the directional bar is provided with a tooth groove.

[0013] As a further description of the above technical solution:

[0014] The driving assembly includes a driving block, and the driving block is fixed on a rectangular frame. A driving wheel is provided at the bottom end of the driving block, and the driving wheel is adapted to the fastening belt.

[0015] As a further description of the above technical solution:

[0016] The transmission assembly includes a bracket, and the bracket is arranged on a rectangular frame. One end of the bracket is provided with a directional column, and the directional column is slidably provided with a movable bar. One end of the movable bar is engaged with a transmission gear, and the transmission gear is engaged with the tooth groove.

[0017] As a further description of the above technical solution:

[0018] The guide assembly includes a support rod, a swing arm is provided at one end of the support rod, a movable arm is provided at the bottom end of the swing arm, a guide wheel is provided at the end of the movable arm away from the swing arm, a spring member is provided at the end of the swing arm close to the swing arm, and the other end of the spring member is fixed on the support rod.

[0019] As a further description of the above technical solution:

[0020] A tripod is provided at the other end of the support rod, clamping rollers are symmetrically provided inside the tripod, and a solder strip is provided between the two clamping rollers.

[0021] As a further description of the above technical solution:

[0022] The shaking assembly includes a connecting arm, a fixing plate is provided at one end of the connecting arm, an eccentric shaft disk is provided at the top of the fixing plate, and a transmission rod shaft is connected to one end of the eccentric shaft disk, and the transmission rod shaft is adapted to the transmission belt.

[0023] As a further description of the above technical solution:

[0024] A linkage ring is provided at the top of the eccentric shaft disc, a sliding bar is provided at one end of the linkage ring, sliding rods are symmetrically provided at both ends of the sliding bar, and the sliding rods are fixed on the connecting arm, a fastening ring is provided at the end of the sliding bar away from the connecting ring, and a welding gun is provided in the fastening ring.

[0025] The present invention provides a heavy steel structure welding device, which has the following beneficial effects:

[0026] In the present invention, the self-propelled component moves in a directional manner along the outer side of the welding body locked by the fastening belt, and the guide component drives the solder strip to move continuously by friction with the weld seam of the welding body, thereby continuously feeding the weld seam. At the same time, the shaking component drives the welding gun to shake back and forth horizontally through the guide component, thereby improving the welding effect at the weld seam. This device solves the limitation that heavy steel structures cannot be rotated for welding through the self-propelled component. The guide component cooperates with the shaking component to effectively solve the problem of continuity in the solder welding process, and improves the welding effect at the weld seam through shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of a heavy steel structure welding device proposed by the present invention;

[0028] Figure 2 Schematic diagram of the structure of the fastening belt in the present invention;

[0029] Figure 3 Schematic diagram of the structure of the self-propelled component in the present invention;

[0030] Figure 4 It is a structural schematic diagram of the hydraulic assembly in the present invention;

[0031] Figure 5 Schematic diagram of the structure of the drive assembly in the present invention;

[0032] Figure 6 It is a structural schematic diagram of the transmission assembly in the present invention;

[0033] Figure 7 Schematic diagram of the structure of the guide assembly in the present invention;

[0034] Figure 8 Schematic diagram of the structure of the dither component in the present invention;

[0035] Figure 9 Schematic diagram of the structure of the transmission bar in the present invention.

[0036] Legend: 1. Welding body; 2. Fastening belt; 3. Self-propelled assembly; 31. Rectangular frame; 32. Support arm; 33. Gear block; 34. Roller; 4. Hydraulic assembly; 41. Hydraulic pump; 42. Connecting plate; 43. Support seat; 44. Rotating shaft; 45. Tensioner; 46. Transmission bar; 461. Orientation bar; 462. Protruding tooth block; 463. Tooth groove; 5. Drive assembly; 51. Drive block; 52. Drive wheel; 6. Transmission assembly; 61. Bracket; 62. Orientation column ;63. Movable bar;64. Transmission gear;7. Guide assembly;71. Support rod;72. Swing arm;73. Movable arm;74. Guide wheel;75. Spring member;76. Tripod;77. Clamping roller;771. Pulley;772. Transmission belt;8. Shaking assembly;81. Connecting arm;82. Fixed plate;83. Eccentric shaft disk;84. Transmission rod shaft;85. Sliding bar;86. Sliding rod;87. Fastening ring;88. Interlocking ring;9. Solder bar;10. Welding gun. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] Reference Figure 1-9 A heavy steel structure welding device includes a welding body 1, a fastening belt 2 provided on the welding body 1; a self-propelled component 3, which is arranged on the welding body 1 through the fastening belt 2; a hydraulic component 4 and a drive component 5; the self-propelled component 3 is driven by the hydraulic component 4 to connect to the drive component 5, and the drive component 5 drives the self-propelled component 3 to move along the welding body 1; the transmission component 6 is connected to the guide component 7, and the guide component 7 is connected to the shaking component 8, which drives the guide component 7 to move against the welding seam in a directional manner and drives the solder strip 9 to continuously feed the material; the shaking component 8 also includes the shaking component 8, which drives the welding gun 10 to shake through the guide component 7.

[0039] Specifically, the welding body 1 is a cylindrical structure, the fastening belt 2 is locked on the outer ring of the welding body 1, the guide component 7 is placed on the weld of the welding body 1, and the fastening belt 2 is driven by the hydraulic component 4 to fit closely with the driving component 5, so that the self-propelled component 3 tightens the fastening belt 2, and the hydraulic component 4 drives the fastening belt 2 to move while synchronously driving the transmission component 6 to move, so that the guide component 7 connected to one end of the transmission component 6 is against the weld, and the guide component 7 is connected to the shaking component 8 during the travel of the transmission component 6 against the weld. When the self-propelled component 3 is in the driving component When driven, the self-propelled assembly 3 moves in a directional manner along the outer side of the welding body 1 locked by the fastening belt 2. The guide assembly 7 drives the solder strip 9 to move continuously by friction with the weld seam of the welding body 1, continuously feeding the weld seam. At the same time, the shaking assembly 8 drives the welding gun 10 to shake back and forth horizontally through the guide assembly 7, improving the welding effect at the weld seam. This device uses the self-propelled assembly 3 to solve the limitation of heavy steel structures that cannot be rotated for welding. The guide assembly 7 and the shaking assembly 8 effectively solve the problem of continuity during the welding process and improve the welding effect at the weld seam through shaking.

[0040] The self-propelled component 3 includes a rectangular frame 31, with support arms 32 symmetrically provided at both ends of the rectangular frame 31, a gear block 33 provided at one end of the support arm 32 close to the rectangular frame 31, a roller 34 provided at the bottom of the support arm 32, and the roller 34 is adapted to the fastening belt 2; the hydraulic component 4 includes a hydraulic pump 41, a support seat 43 provided at the bottom of the hydraulic pump 41, and the support seat 43 is fixed to the rectangular frame 31, a connecting plate 42 is provided at the top of the hydraulic pump 41, a rotating shaft 44 is provided at the bottom of the connecting plate 42, a tensioning wheel 45 is provided outside the rotating shaft 44, and a transmission bar 46 is provided on the rotating shaft 44 through the connecting plate 42; the transmission bar 46 includes a directional bar 461, and the directional bar 46 1 is provided on the rotating shaft 44, and symmetrically provided with protruding tooth blocks 462 at both ends of the orientation bar 461, and the protruding tooth blocks 462 are engaged with the gear block 33, and a tooth groove 463 is formed at one end of the orientation bar 461; the driving assembly 5 includes a driving block 51, and the driving block 51 is fixed to the rectangular frame 31, and a driving wheel 52 is provided at the bottom end of the driving block 51, and the driving wheel 52 is adapted to the fastening belt 2; the transmission assembly 6 includes a bracket 61, and the bracket 61 is provided on the rectangular frame 31, and an orientation column 62 is provided at one end of the bracket 61, and the orientation column 62 is slidably provided with a movable bar 63, and a transmission gear 64 is engaged at one end of the movable bar 63, and the transmission gear 64 is engaged with the tooth groove 463;

[0041] Specifically, the hydraulic pump 41 drives the rotating shaft 44 connected to the connecting plate 42 to move upward, so that the tensioning wheel 45 and the transmission bar 46 in the rotating shaft 44 move in a directional manner. The tensioning wheel 45 drives the fastening belt 2 to fit with the driving wheel 52 through the upward movement of the rotating shaft 44. The gear block 33 engaged with the convex tooth block 462 in the transmission bar 46 drives the support arm 32 to move. The roller 34 movably connected to the bottom end of the support arm 32 presses the fastening belt 2 against the welding body 1, so that the fastening belt 2 stably binds the self-propelled component 3 to the welding body 1, and at the same time, the tooth groove 463 provided on the transmission bar 46 drives the meshing transmission gear 64 to rotate, and the movable bar 63 meshing with the transmission gear 64 moves along the directional column 62 in the opposite direction to the transmission bar 46. The guide assembly 7 connected to the movable bar 63 abuts against the welding seam of the welding body 1. Then, the self-propelled component 3 realizes uniform and stable movement along the outer side of the welding body 1 through the hydraulic component 4 and the driving component 5, and realizes the effect of directional movement through the guide assembly 7, thereby reducing the deviation of the self-propelled component 3 during the movement process;

[0042] The guide assembly 7 includes a support rod 71, a swing arm 72 is provided at one end of the support rod 71, a movable arm 73 is provided at the bottom end of the swing arm 72, a guide wheel 74 is provided at the end of the movable arm 73 away from the swing arm 72, and a spring member 75 is provided at the end of the swing arm 72 close to the swing arm 72, and the other end of the spring member 75 is fixed to the support rod 71; a tripod 76 is provided at the other end of the support rod 71, and clamping rollers 77 are symmetrically provided in the tripod 76, and a solder strip 9 is provided between the two clamping rollers 77;

[0043] Specifically, the guide wheel 74 in the guide assembly 7 squeezes the spring member 75 under the drive of the transmission assembly 6 to contract (the spring member 75 can be understood as a spring in the prior art). The swing arm 72 and the movable arm 73 fold during the pressurization process, and the clamping roller 77 movably connected to the tripod 76, wherein the clamping roller 77 at the bottom is in contact with the guide wheel 74 during the extrusion stroke, so that the guide wheel 74 drives the solder strip 9 in the clamping roller 77 to move through friction, which facilitates the continuous movement of the solder strip 9 to the weld seam when the self-propelled assembly 3 moves, thereby improving the uninterrupted feeding during the welding process and improving the welding efficiency.

[0044] The shaking assembly 8 includes a connecting arm 81, a fixing plate 82 is provided at one end of the connecting arm 81, an eccentric shaft disc 83 is provided at the top of the fixing plate 82, a transmission rod shaft 84 is connected to one end of the eccentric shaft disc 83, and the transmission rod shaft 84 is adapted to the transmission belt 772; a linkage ring 88 is provided at the top of the eccentric shaft disc 83, a sliding bar 85 is provided at one end of the linkage ring 88, and sliding bars 86 are symmetrically provided at both ends of the sliding bar 85, and the sliding bars 86 are fixed to the connecting arm 81, and a fastening ring 87 is provided at the end of the sliding bar 85 away from the connecting ring, and a welding gun 10 is arranged in the fastening ring 87;

[0045] Specifically, the transmission rod shaft 84 in the shaking assembly 8 is connected to the pulley 771 in the clamping roller 77 through the transmission belt 772. When the clamping roller 77 is driven by the guide wheel 74, the transmission rod shaft 84 is synchronously driven to rotate, and the transmission rod shaft 84 drives the eccentric shaft disk 83 to rotate. The connecting ring located on the eccentric shaft disk 83 drives the sliding bar 85 to reciprocate along the sliding bar 86, so that the welding gun 10 to which the sliding bar 85 is fixed through the fastening ring 87 is horizontally reciprocated at the weld, thereby improving the welding effect at the weld.

[0046] Working principle: Lock the fastening belt 2 on the outer ring of the welding body 1, and place the guide assembly 7 on the weld of its welding body 1. Drive the fastening belt 2 to fit tightly with the drive assembly 5 through the hydraulic assembly 4, so that the self-propelled assembly 3 tightens the fastening belt 2. When the hydraulic assembly 4 drives the fastening belt 2 to move, it simultaneously drives the transmission assembly 6 to move, so that the guide assembly 7 connected to one end of the transmission assembly 6 is against the weld. The guide assembly 7 is connected to the shaking assembly 8 during the stroke of the transmission assembly 6 against the weld, wherein the hydraulic pump 41 drives the rotating shaft 44 connected to the connecting plate 42 to move upward, so that the tensioning wheel 45 and the transmission bar 46 in the rotating shaft 44 move in a directional manner, and the tensioning wheel 45 drives the fastening belt 2 to fit with the driving wheel 52 through the upward movement of the rotating shaft 44, and the gear block 33 engaged with the convex tooth block 462 in the transmission bar 46 drives the support The arm 32 moves, and the roller 34 movably connected to the bottom end of the support arm 32 presses the fastening belt 2 against the welding body 1, so that the fastening belt 2 stably binds the self-propelled component 3 to the welding body 1. At the same time, the tooth groove 463 opened by the transmission bar 46 drives the meshing transmission gear 64 to rotate, and the movable bar 63 meshing with the transmission gear 64 moves in the opposite direction of the transmission bar 46 along the directional column 62, and the guide component 7 connected to the movable bar 63 is in contact with the welding seam of the welding body 1; when the self-propelled component 3 is driven by the driving component 5, the self-propelled component 3 moves in a directional manner along the outside of the welding body 1 locked by the fastening belt 2, and the guide component 7 drives the solder bar 9 to move continuously by friction with the weld seam of the welding body 1, and continuously feeds the weld seam. At the same time, the shaking component 8 drives the welding gun 10 to shake back and forth horizontally through the guide component 7, thereby improving the welding effect at the weld seam.

[0047] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A heavy steel structure welding device, characterized in that, It comprises a welding body (1), and a fastening belt (2) is provided on the welding body (1); It also includes a self-propelled component (3), which is arranged on the welding body (1) through a fastening belt (2); the self-propelled component (3) includes a rectangular frame (31), support arms (32) are symmetrically provided at both ends of the rectangular frame (31), a gear block (33) is provided at one end of the support arm (32) close to the rectangular frame (31), and a roller (34) is provided at the bottom end of the support arm (32), and the roller (34) is adapted to the fastening belt (2); It also includes a hydraulic assembly (4) and a drive assembly (5); the self-propelled assembly (3) is driven by the hydraulic assembly (4) to connect the drive assembly (5), and the self-propelled assembly (3) is driven by the drive assembly (5) to move along the welding body (1); the hydraulic assembly (4) includes a hydraulic pump (41), a support seat (43) is provided at the bottom end of the hydraulic pump (41), and the support seat (43) is fixed on the rectangular frame (31); the top end of the hydraulic pump (41) is provided with a connecting plate (42), the bottom end of the connecting plate (42) is provided with a rotating shaft (44), the rotating shaft (44) is provided with a tensioning wheel (45) outside, and the rotating shaft (44) passes through the connecting plate (42) and is provided with a transmission bar (46); the drive assembly (5) includes a driving block (51), and the driving block (51) is fixed on the rectangular frame (31), the bottom end of the driving block (51) is provided with a driving wheel (52), and the driving wheel (52) is adapted to the fastening belt (2); It also includes a transmission component (6), the transmission component (6) is transmission-connected to a guide component (7), the guide component (7) is transmission-connected to a shaking component (8), and the transmission component (6) drives the guide component (7) to move against the welding seam in a directional manner and transmits the welding strip (9) to continuously feed the material; It also includes a shaking component (8), which drives the welding gun (10) to shake through the guide component (7).

2. A heavy steel structure welding device according to claim 1, characterized in that: The transmission bar (46) includes a directional bar (461), and the directional bar (461) is provided on the rotating shaft (44). Both ends of the directional bar (461) are symmetrically provided with protruding tooth blocks (462), and the protruding tooth blocks (462) are engaged with the gear block (33). One end of the directional bar (461) is provided with a tooth groove (463).

3. A heavy steel structure welding device according to claim 1, characterized in that: The transmission assembly (6) includes a bracket (61), and the bracket (61) is arranged on the rectangular frame (31). One end of the bracket (61) is provided with a directional column (62), and the directional column (62) is slidably provided with a movable bar (63). One end of the movable bar (63) is meshed with a transmission gear (64), and the transmission gear (64) is meshed with the tooth groove (463).

4. A heavy steel structure welding device according to claim 1, characterized in that: The guide assembly (7) comprises a support rod (71), one end of the support rod (71) is provided with a swing arm (72), the bottom end of the swing arm (72) is provided with a movable arm (73), the end of the movable arm (73) away from the swing arm (72) is provided with a guide wheel (74), the end of the swing arm (72) close to the swing arm (72) is provided with a spring member (75), and the other end of the spring member (75) is fixed to the support rod (71).

5. A heavy steel structure welding device according to claim 4, characterized in that: A tripod (76) is provided at the other end of the support rod (71), clamping rollers (77) are symmetrically provided inside the tripod (76), and a solder strip (9) is provided between the two clamping rollers (77).

6. A heavy steel structure welding device according to claim 1, characterized in that: The shaking assembly (8) comprises a connecting arm (81), one end of the connecting arm (81) is provided with a fixing plate (82), the top end of the fixing plate (82) is provided with an eccentric shaft disc (83), one end of the eccentric shaft disc (83) is connected to a transmission rod shaft (84), and the transmission rod shaft (84) is adapted to the transmission belt (772).

7. A heavy steel structure welding device according to claim 6, characterized in that: A linkage ring (88) is provided at the top of the eccentric shaft disc (83), a sliding bar (85) is provided at one end of the linkage ring (88), sliding rods (86) are symmetrically provided at both ends of the sliding bar (85), and the sliding rods (86) are fixed on the connecting arm (81), and a fastening ring (87) is provided at one end of the sliding bar (85) away from the connecting ring, and a welding gun (10) is provided in the fastening ring (87).

Citation Information

Patent Citations

  • Steel structure welding device

    CN117047365A

  • Welding device for large-diameter steel pipe

    CN114289959A

  • Welding device of steel pipe pile

    JP2012035309A