Large-diameter steel pipe welding device

Abstract

The utility model discloses a large -diameter steel pipe welding set, including first drive seat, second drive seat and welding torch drive subassembly, welding torch drive subassembly is located between first drive seat and second drive seat, first drive seat and second drive seat are used for supporting steel pipe, and drive steel pipe to do rotating motion, welding torch drive subassembly includes two groups of sliding racks, and two groups sliding racks are by second motor drive, and the electric cylinder is installed on the sliding rack, and the push rod fixed connection welding torch mounting bracket of electric cylinder, welding torch mounting bracket installs welding torch subassembly. The utility model drives large -diameter steel pipe to do rotating motion through first drive seat and second drive seat, makes large -diameter steel pipe rotate around own axis, through two groups of symmetrical layout's welding torch subassembly, simultaneously to large -diameter steel pipe and apply for welding, realize single ring gap both sides synchronous fusion, and the total welding time is greatly shortened, and welding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of large-diameter steel pipe welding technology, specifically to a large-diameter steel pipe welding device. Background Technology

[0002] Large-diameter steel pipes refer to steel pipes with a large outer diameter, generally greater than 406.4 mm (16 inches). They can be made of different steels, such as carbon steel and alloy steel, and are available in a variety of diameters. Large-diameter steel pipes are widely used in industrial fields with high requirements for conveying capacity, pressure resistance, or structural strength. Welding is a core step in the manufacturing and application of large-diameter steel pipes, directly affecting the pipeline's pressure resistance, sealing performance, and long-term reliability.

[0003] In the welding process of large-diameter steel pipes, a single welding torch is usually used to complete the welding of the entire circumferential seam. Since the circumferential seam of large-diameter steel pipes is relatively long, it takes a long time to weld using only a single welding torch, resulting in low welding efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a large-diameter steel pipe welding device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a large-diameter steel pipe welding device, comprising a first drive seat, a second drive seat, and a welding torch drive assembly. The welding torch drive assembly is located between the first drive seat and the second drive seat. The first drive seat and the second drive seat are used to support the steel pipe and drive the steel pipe to rotate. The welding torch drive assembly includes two sets of slides, which are driven by a second motor. An electric cylinder is installed on the slide, and the push rod of the electric cylinder is fixedly connected to a welding torch mounting frame. The welding torch assembly is installed on the welding torch mounting frame.

[0006] The welding torch drive assembly includes a U-shaped base, and the second motor is mounted on one end face of the U-shaped base.

[0007] The output shaft of the second motor is fixedly connected to a bidirectional lead screw, and a slide bar is fixedly installed on the U-shaped seat, with the slide bar located below the bidirectional lead screw.

[0008] The bidirectional lead screw and the slide rod both pass through the slide frame, and the slide frame and the slide rod are slidably connected.

[0009] The two sets of welding torch assemblies are symmetrically distributed on both sides of the steel pipe.

[0010] The welding torch assembly is aligned with the circumferential seam of the steel pipe.

[0011] The first drive seat and the second drive seat each include a first mounting bracket and a second mounting bracket.

[0012] The first mounting frame is equipped with an active idler roller and a first motor. The output shaft of the first motor is fixedly connected to the active idler roller, and the active idler roller is connected to the first mounting frame through a bearing.

[0013] The second mounting frame is equipped with a driven roller, which is connected to the second mounting frame via a bearing.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention drives a large-diameter steel pipe to rotate via a first drive seat and a second drive seat, causing the large-diameter steel pipe to rotate around its own axis. Through two sets of symmetrically arranged welding gun assemblies, the large-diameter steel pipe is welded simultaneously, achieving synchronous fusion on both sides of a single circumferential seam, which greatly shortens the total welding time and improves welding efficiency. Attached Figure Description

[0015] Figure 1 This is a welding illustration of the present invention. Figure 1 ; Figure 2 This is a welding illustration of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the first drive seat and the second drive seat of this utility model; Figure 4 This is a schematic diagram of the structure of the welding torch drive assembly of this utility model.

[0016] In the figure: 1. First drive seat; 2. Second drive seat; 3. Welding torch drive assembly; 11. First mounting bracket; 12. Second mounting bracket; 13. Active idler roller; 14. Driven idler roller; 15. First motor; 31. U-shaped seat; 32. Second motor; 33. Bidirectional lead screw; 34. Slide bar; 35. Slide carriage; 36. Electric cylinder; 37. Welding torch mounting bracket; 38. Welding torch assembly. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-4This utility model provides a technical solution: a large-diameter steel pipe welding device, including a first drive seat 1, a second drive seat 2, and a welding torch drive assembly 3. The welding torch drive assembly 3 is located between the first drive seat 1 and the second drive seat 2. When welding the large-diameter steel pipe, the position of the welding torch in the welding torch drive assembly 3 is adjusted so that the position of the welding torch is aligned with the circumferential seam of the steel pipe. The first drive seat 1 and the second drive seat 2 are used to support the steel pipe and drive the steel pipe to rotate. The welding torch drive assembly 3 includes two sets of slides 35, which are driven by a second motor 32. An electric cylinder 36 is installed on the slide 35. The push rod of the electric cylinder 36 is fixedly connected to the welding torch mounting frame 37. A welding torch assembly 38 is installed on the welding torch mounting frame 37.

[0019] The large-diameter steel pipe to be welded is placed on the first drive seat 1 and the second drive seat 2. The large-diameter steel pipe is driven to rotate by the first drive seat 1 and the second drive seat 2, so that the large-diameter steel pipe rotates around its own axis. The large-diameter steel pipe is welded simultaneously by two sets of symmetrically arranged welding gun assemblies 38, so as to achieve synchronous fusion on both sides of a single circumferential seam, which greatly shortens the total welding time and improves welding efficiency.

[0020] The second motor 32 can drive the two sets of slides 35 to move closer or further apart, and the two sets of slides 35 can drive the two sets of welding torch assemblies 38 to move closer or further apart, adjusting the distance between the two sets of welding torch assemblies 38. Through the two sets of symmetrically arranged welding torch assemblies 38, large-diameter steel pipes can be welded simultaneously. The electric cylinder 36 can drive the welding torch assemblies 38 to move axially, adjusting the height of the welding torch assemblies 38. According to the actual size of the large-diameter steel pipe, the height of the welding torch assemblies 38 is adjusted accordingly, so that the two sets of welding torch assemblies 38 are aligned with the circumferential seams at both ends of the steel pipe. When the steel pipe rotates at a uniform speed, the two sets of welding torch assemblies 38 start the arc synchronously, weld synchronously, and retract the arc synchronously, reducing the time by half. The welding speed, current, and voltage of the two sets of welding torch assemblies 38 are completely consistent, ensuring balanced heat input on both sides.

[0021] The welding torch drive assembly 3 includes a U-shaped base 31, and a second motor 32 is mounted on one end face of the U-shaped base 31.

[0022] The output shaft of the second motor 32 is fixedly connected to the bidirectional lead screw 33. A slide rod 34 is fixedly installed on the U-shaped seat 31, and the slide rod 34 is located below the bidirectional lead screw 33. The two ends of the bidirectional lead screw 33 have opposite threads, which are used to synchronously drive the double welding guns to adjust their positions and maintain symmetry.

[0023] In this system, both the bidirectional lead screw 33 and the slide rod 34 pass through the slide frame 35, and the slide frame 35 and the slide rod 34 are slidably connected. The second motor 32 drives the bidirectional lead screw 33 at one end to rotate, thereby driving the two sets of slide frames 35 to slide along the slide rod 34. The two sets of slide frames 35 drive the two sets of welding gun assemblies 38 to move closer or further apart, thereby adjusting the distance between the two sets of welding gun assemblies 38.

[0024] Two sets of welding torch assemblies 38 are symmetrically distributed on both sides of the steel pipe. When the steel pipe rotates around its own axis, the two sets of symmetrically arranged welding torch assemblies 38 simultaneously weld the steel pipe.

[0025] Among them, the welding gun assembly 38 is aligned with the circumferential seam of the steel pipe to achieve synchronous fusion deposition on both sides of a single circumferential seam.

[0026] The first drive seat 1 and the second drive seat 2 each include a first mounting bracket 11 and a second mounting bracket 12.

[0027] The first mounting frame 11 is equipped with an active idler roller 13 and a first motor 15. The output shaft of the first motor 15 is fixedly connected to the active idler roller 13. The active idler roller 13 is connected to the first mounting frame 11 through a bearing. The first motor 15 provides initial power to drive the active idler roller 13 to rotate.

[0028] The second mounting frame 12 is equipped with a driven roller 14, which is connected to the second mounting frame 12 by a bearing. The surfaces of the driving roller 13 and the driven roller 14 are treated with anti-slip treatment, such as diamond knurling, to increase the coefficient of friction. The driving roller 13 and the driven roller 14 are in direct contact with the steel pipe and drive the steel pipe to rotate through friction. The rotation speed of the steel pipe can be precisely controlled by adjusting the speed of the first motor 15.

[0029] Working principle: During use, the large-diameter steel pipe to be welded is placed on the first drive seat 1 and the second drive seat 2. The position of the welding torch assembly 38 is adjusted so that the position of the welding torch is aligned with the circumferential seam of the steel pipe. The large-diameter steel pipe is driven to rotate by the first drive seat 1 and the second drive seat 2, causing the large-diameter steel pipe to rotate around its own axis. By adjusting the speed of the first motor 15, the rotation speed of the steel pipe can be precisely controlled. The large-diameter steel pipe is welded simultaneously by two symmetrically arranged welding torch assemblies 38. The two sets of welding torch assemblies 38 start the arc, weld, and terminate the arc synchronously, which halves the time. The welding speed, current, and voltage of the two sets of welding torch assemblies 38 are completely consistent, ensuring balanced heat input on both sides and achieving synchronous fusion on both sides of a single circumferential seam, which greatly shortens the total welding time and improves welding efficiency.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large-diameter steel pipe welding device, comprising a first drive base (1), a second drive base (2), and a welding torch drive assembly (3), characterized in that: The welding torch drive assembly (3) is located between the first drive seat (1) and the second drive seat (2). The first drive seat (1) and the second drive seat (2) are used to support the steel pipe and drive the steel pipe to rotate. The welding torch drive assembly (3) includes two sets of slides (35). The two sets of slides (35) are driven by the second motor (32). An electric cylinder (36) is installed on the slide (35). The push rod of the electric cylinder (36) is fixedly connected to the welding torch mounting frame (37). The welding torch assembly (38) is installed on the welding torch mounting frame (37).

2. The large-diameter steel pipe welding device according to claim 1, characterized in that: The welding torch drive assembly (3) includes a U-shaped base (31), and the second motor (32) is mounted on one side end face of the U-shaped base (31).

3. The large-diameter steel pipe welding device according to claim 2, characterized in that: The output shaft of the second motor (32) is fixedly connected to the bidirectional lead screw (33), and a slide rod (34) is fixedly installed on the U-shaped seat (31), with the slide rod (34) located below the bidirectional lead screw (33).

4. The large-diameter steel pipe welding device according to claim 3, characterized in that: The bidirectional lead screw (33) and the slide rod (34) both pass through the slide frame (35), and the slide frame (35) and the slide rod (34) are slidably connected.

5. The large-diameter steel pipe welding device according to claim 1, characterized in that: The two sets of welding torch assemblies (38) are symmetrically distributed on both sides of the steel pipe.

6. The large-diameter steel pipe welding device according to claim 1, characterized in that: The welding torch assembly (38) is aligned with the circumferential seam of the steel pipe.

7. The large-diameter steel pipe welding device according to claim 1, characterized in that: The first drive seat (1) and the second drive seat (2) both include a first mounting bracket (11) and a second mounting bracket (12).

8. The large-diameter steel pipe welding device according to claim 7, characterized in that: The first mounting frame (11) is equipped with an active idler roller (13) and a first motor (15). The output shaft of the first motor (15) is fixedly connected to the active idler roller (13). The active idler roller (13) and the first mounting frame (11) are connected by bearings.

9. A large-diameter steel pipe welding device according to claim 8, characterized in that: A driven roller (14) is mounted on the second mounting frame (12), and the driven roller (14) is connected to the second mounting frame (12) by a bearing.

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