A large-diameter steel pipe circumferential welder

Abstract

This utility model relates to the field of steel pipe welding, and more particularly to a device for welding circumferential seams of large-diameter steel pipes. The device includes a construction support with a construction platform on it. A welding window is provided on the construction platform, and a welding assembly is positioned next to the welding window. A rotating assembly is located below the welding window, on which the steel pipe is placed. The rotating assembly drives the steel pipe to rotate along its axis, causing the circumferential seam to rotate and pass directly below the welding window. The welding assembly then welds the circumferential seam through the welding window. A heating support is located on one side of the rotating assembly, with its cantilever extending into the hollow area of ​​the steel pipe. A heating assembly is mounted on the cantilever to heat the circumferential seam. In operation, the device simultaneously heats the circumferential seam at a fixed point using the heating assembly while the rotating assembly rotates the steel pipe, driving the heated circumferential seam to rotate directly below the welding window for welding. This device saves energy and connects circumferential seam heating and welding in series, improving welding efficiency.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe welding, and in particular to a device for circumferential welding of large-diameter steel pipes. Background Technology

[0002] Circumferential welding of steel pipes refers to the process of welding the circumferential seam of a steel pipe. It is widely used in oil and gas pipelines, chemical pipelines, and structural steel pipes for buildings. With the development of marine energy, the weight and structural dimensions of marine engineering equipment are constantly breaking records, and the use of high-performance special steels is becoming increasingly widespread to cope with the harsh deep-sea environment. This places higher demands on circumferential welding technology in the manufacturing process. Preheating before welding is a process of appropriately heating the workpiece, both locally and as a whole, before the actual welding operation. Its purpose is to reduce the cooling rate of the weld joint, avoid the formation of hardened structures, and reduce welding stress and deformation; it is an effective method to prevent welding cracks. Welding and extending large-diameter steel pipes is a common operation in the marine equipment manufacturing industry. However, as the diameter and wall thickness of the steel pipe increase, the welding quality becomes more difficult to control. Currently, the industry typically preheats the entire steel pipe with a flame before welding the circumferential seam. This method consumes a lot of energy for preheating, and because preheating and welding are performed separately, welding cannot be performed immediately, resulting in low welding efficiency. Utility Model Content

[0003] To overcome the above problems, this utility model provides a large-diameter steel pipe circumferential weld device. The technical solution adopted by this utility model to solve its technical problems is as follows:

[0004] A large-diameter steel pipe circumferential weld device includes a construction support, a construction platform on the construction support, a welding window on the construction platform, and a welding assembly next to the welding window. A rotating assembly is set below the welding window, and the steel pipe is placed on the rotating assembly. The rotating assembly drives the steel pipe to rotate along the axis of the steel pipe. The circumferential weld of the steel pipe rotates and passes directly below the welding window. The welding assembly welds the circumferential weld through the welding window. A heating support is set on one side of the rotating assembly. The cantilever of the heating support extends into the hollow area of ​​the steel pipe, and a heating assembly is set on the cantilever to heat the circumferential weld.

[0005] Furthermore, the heating assembly includes a central positioning cylinder, which is sleeved on the cantilever. The central positioning cylinder is connected to an arc-shaped frame via a connecting arm. An electric heating ceramic plate is installed on the arc-shaped frame, and abutment rollers are installed on both sides of the arc-shaped frame. The abutment rollers abut against the inner wall of the steel pipe and roll relative to the steel pipe.

[0006] Furthermore, the central positioning cylinder is slidably sleeved on the cantilever, which is provided with several positioning holes. Positioning pins are inserted into the positioning holes to fix the central positioning cylinder on the cantilever.

[0007] Furthermore, the tire-rotating assembly includes a base, on which a driving wheel and a driven wheel are mounted. The driving wheel is connected to a motor, and a steel pipe is placed on the driving wheel and the driven wheel.

[0008] Furthermore, the base is provided with a slide rail, on which an active slide and a driven slide are slidably mounted. The active rotating wheel and the motor are mounted on the active slide, and the driven rotating wheel is mounted on the driven slide.

[0009] Furthermore, the base is equipped with movable locking wheels.

[0010] Furthermore, the bottom of the construction support is equipped with movable locking wheels.

[0011] The beneficial effects of this utility model are:

[0012] The device includes a construction support frame with a construction platform. A welding window is located on the platform, and a welding assembly is positioned next to the window. Below the welding window is a rotating assembly on which a steel pipe rests. The rotating assembly drives the steel pipe to rotate along its axis, causing the circumferential seam to pass directly below the welding window. The welding assembly then welds the circumferential seam through the welding window. A heating support frame is located on one side of the rotating assembly, with its cantilever extending into the hollow area of ​​the steel pipe. A heating assembly is mounted on the cantilever to heat the circumferential seam. During operation, the circumferential seam is heated at a fixed point using the heating assembly while the rotating assembly rotates the steel pipe, driving the heated seam to a position directly below the welding window for welding. This device saves energy and combines circumferential seam heating and welding in series, improving welding efficiency. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, wherein:

[0014] Figure 1 This is a three-dimensional view of the welding equipment;

[0015] Figure 2 These are a three-dimensional view and a magnified partial view of the heating assembly;

[0016] Figure 3 This is a three-dimensional view of the tire rotating assembly.

[0017] Figure number marking:

[0018] 100. Steel pipe; 101. Circumferential seam;

[0019] 200. Construction scaffold; 201. Construction platform; 202. Welding window; 203. Welding assembly; 204. Movable locking wheel;

[0020] 300. Tire rotation assembly; 301. Base; 302. Driving wheel; 303. Driven wheel; 304. Motor; 305. Slide rail; 306. Driving slide; 307. Driven slide;

[0021] 400. Heating bracket; 401. Cantilever; 402. Center positioning cylinder; 403. Connecting arm; 404. Arc frame; 405. Electric heating ceramic plate; 406. Abutting roller; 407. Positioning hole; 408. Positioning pin. Detailed Implementation

[0022] To better understand the purpose, structure, and function of this utility model, the following detailed description of a specific embodiment of the utility model "a large-diameter steel pipe circumferential weld device" is provided in conjunction with the accompanying drawings.

[0023] See Figure 1 In this embodiment, the welding device includes a construction support 200, a construction platform 201 horizontally arranged on the construction support 200, a welding window 202 penetrating the upper and lower parts of the construction platform 201, and a welding assembly 203 arranged on the side of the welding window 202; a rotating assembly 300 is arranged below the welding window, and a steel pipe 100 is placed on the rotating assembly 300. The rotating assembly 300 drives the steel pipe 100 to rotate along the axis of the steel pipe 100, and the circumferential seam 101 of the steel pipe 100 rotates synchronously. The circumferential seam 101 rotates and passes directly below the welding window 202. The welding assembly 203 welds the circumferential seam 101 through the welding window 202; a heating support 400 is arranged on one side of the rotating assembly 300, and the cantilever 401 of the heating support 400 extends into the hollow area of ​​the steel pipe 100. A heating assembly is arranged on the cantilever 401 to heat the circumferential seam 101. In use, the heating component heats the circumferential seam 101, while the rotating component 300 drives the steel pipe 100 to rotate, thereby causing the heated circumferential seam 101 to rotate and pass directly below the welding window 202. When the circumferential seam 101 passes directly below the welding window 202, the welding component 203 welds the circumferential seam 101. Using this device, the heating component specifically heats the circumferential seam 101, preventing energy waste and saving energy. Furthermore, using this device to connect heating and welding operations in series, the heated circumferential seam 101 immediately rotates to below the welding window 202 for welding operations, improving welding efficiency.

[0024] See further Figure 2In this embodiment, the heating assembly includes a central positioning cylinder 402, which is sleeved on the cantilever 401. The central positioning cylinder 402 is connected to an arc-shaped frame 404 via a connecting arm 403. An electrothermal ceramic plate 405 is disposed on the arc-shaped frame 404, and abutment rollers 406 are disposed on both sides of the arc-shaped frame 404. The abutment rollers 406 abut against the inner wall of the steel pipe 100 and roll relative to the steel pipe 100. In this way, by contacting the inner wall of the steel pipe 100 with the abutment rollers 406, it can be ensured that the electrothermal ceramic plate 405 will not touch the rolling inner wall of the steel pipe 100. At the same time, the rolling inner wall of the steel pipe 100 rolls relative to the heating assembly without affecting the heating operation of the heating assembly. Preferably, the radius of the arc-shaped frame 404 is the same as the radius of the steel pipe 100, which can achieve the best uniform heating effect.

[0025] More specifically, in this embodiment, the central positioning cylinder 402 is slidably sleeved on the cantilever 401. The cantilever 401 is provided with a plurality of positioning holes 407. The positioning pins 408 are inserted into the positioning holes 407 to fix the central positioning cylinder 402 on the cantilever 401. When it is necessary to adjust the position of the heating component, the positioning pins 408 at both ends of the central positioning cylinder 402 are removed. After sliding the central positioning cylinder 402 to the appropriate position, the positioning pins 408 are inserted into the positioning holes 407 at both ends of the central positioning cylinder 402 to fix the central positioning cylinder 402 and complete the position adjustment of the heating component.

[0026] See further Figure 3 In this embodiment, the tire rotating assembly 300 includes a base 301, on which a driving wheel 302 and a driven wheel 303 are disposed. The driving wheel 302 is connected to a motor 304. A steel pipe 100 is placed on the driving wheel 302 and the driven wheel 303. The motor 304 drives the driving wheel 302 to rotate. The driving wheel 302 drives the steel pipe 100 to rotate through friction. The steel pipe 100 drives the driven wheel 303 to rotate to maintain stable rotation.

[0027] More specifically, in this embodiment, a slide rail 305 is provided on the base 301, and an active slide 306 and a driven slide 307 are slidably arranged on the slide rail 305. The active rotating wheel 302 and the motor 304 are arranged on the active slide 306, and the driven rotating wheel 303 is arranged on the driven slide 307. In this way, the distance between the active rotating wheel 302 and the driven rotating wheel 303 can be adjusted according to the diameter of the steel pipe 100 to ensure that the steel pipe 100 can rotate stably between the active rotating wheel 302 and the driven rotating wheel 303.

[0028] Further General Figure 1In this embodiment, both the bottom of the base 301 and the bottom of the construction support 200 are provided with movable locking wheels 204. The movable locking wheels 204 are preferably load-bearing wheels commonly used in the art that can be rolled and adjusted and locked in place; so as to adjust the position of the construction support 200 and the rotating assembly 300, and to lock them in place after adjustment to prevent slippage.

[0029] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In the description of this application, "multiple" is understood as "at least two." "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. A connected to B can represent: A and B directly connected and A and B connected through C. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A large diameter steel pipe girth welding apparatus characterized by comprising: The system includes a construction support (200), on which a construction platform (201) is mounted. A welding window (202) is provided on the construction platform (201), and a welding assembly (203) is provided next to the welding window (202). A rotating assembly (300) is located below the welding window (202), and a steel pipe (100) is placed on the rotating assembly (300). The rotating assembly (300) drives the steel pipe (100) along its axis. As the core rotates, the circumferential seam (101) of the steel pipe (100) rotates past the welding window (202) directly below, and the welding assembly (203) welds the circumferential seam (101) through the welding window (202); a heating bracket (400) is provided on one side of the rotating assembly (300), and the cantilever (401) of the heating bracket (400) extends into the hollow area of ​​the steel pipe (100), and a heating assembly is provided on the cantilever (401) to heat the circumferential seam (101).

2. A device for welding a girth weld of a large diameter steel pipe according to claim 1, wherein The heating assembly includes a central positioning cylinder (402), which is sleeved on the cantilever (401). The central positioning cylinder (402) is connected to an arc-shaped frame (404) via a connecting arm (403). An electrically heated ceramic plate (405) is provided on the arc-shaped frame (404). Abutment rollers (406) are provided on both sides of the arc-shaped frame (404). The abutment rollers (406) abut against the inner wall of the steel pipe (100) and roll relative to the steel pipe (100).

3. A device for welding a girth weld of a large diameter steel pipe according to claim 2, wherein The central positioning cylinder (402) is slidably sleeved on the cantilever (401). The cantilever (401) is provided with a plurality of positioning holes (407). The positioning pin (408) passes through the positioning holes (407) to fix the central positioning cylinder (402) on the cantilever (401).

4. A device for welding a girth weld of a large diameter steel pipe according to claim 1, wherein The tire rotating assembly (300) includes a base (301), on which a driving wheel (302) and a driven wheel (303) are provided. The driving wheel (302) is connected to a motor (304), and the steel pipe (100) is placed on the driving wheel (302) and the driven wheel (303).

5. A device for welding a girth weld of a large diameter steel pipe according to claim 4, wherein The base (301) is provided with a slide rail (305), and an active slide (306) and a passive slide (307) are slidably arranged on the slide rail (305). The active rotating wheel (302) and the motor (304) are arranged on the active slide (306), and the passive rotating wheel (303) is arranged on the passive slide (307).

6. A device for welding a girth weld of a large diameter steel pipe according to claim 4, wherein The base (301) is provided with a movable locking wheel (204) at its bottom.

7. A device for welding a girth weld of a large diameter steel pipe according to claim 1, wherein The construction support (200) is equipped with a movable locking wheel (204) at its bottom.

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