Flange girth welding device

Abstract

The invention relates to the technical field of welding devices, in particular to a flange girth welding device. According to the technical scheme, the device comprises a mounting frame and a movable welding frame, a gear motor and a shell are fixed to the welding frame, a driving shaft penetrating through the interior of the shell is fixed to the output end of the gear motor, and a round base, a power plate, a connecting assembly and a movable base are sequentially arranged in the shell. The two symmetrical welding points are arranged, it can be guaranteed that stress on the two sides is consistent, so that welding stress is offset as much as possible, the welding performance is guaranteed, then through the movable connecting assembly, the two welding heads can conduct all welding on a welding seam, a welding gap can be divided into two parts, and the welding efficiency is improved. And the temperatures of the two regions are equivalent when the two regions are welded, so that the stress of expansion caused by heat and contraction caused by cold, which is generated by temperature difference, is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of welding devices, and in particular to a flange circumferential seam welding device. Background Art

[0002] As pointed out in the existing document with the authorization announcement number "CN117324883A", the branch pipe flange of an aluminum alloy welded cylinder is usually a plug-in structure, so that the bottom end of the branch pipe flange is connected to one side of the aluminum alloy welded cylinder in a plug-in manner. When welding, it is difficult to perform fast and stable welding with the plug-in structure, and it is easy to cause potential problems of insecure welding due to the curvature of the weld seam, reducing the welding efficiency of the plug-in structure.

[0003] In actual processing, the flange and the pipeline are often welded by circumferential seams, and circumferential seam welding can improve the welding effect. During circumferential seam welding, since circumferential seam welding is a process of local heating and cooling, uneven temperature fields will be generated in the flange during welding, resulting in the generation of welding stress. The welding stress may cause the flange to deform, affecting its installation accuracy and service performance. Moreover, during long-term use, the welding stress and the working stress are superimposed, which may cause the weld seam to fail prematurely. Summary of the Invention

[0004] The object of the present invention is to propose a flange circumferential seam welding device for the problems existing in the background art.

[0005] The technical solution of the present invention: A flange circumferential seam welding device includes a mounting frame and a movable welding frame. A reduction motor and a housing are fixed on the welding frame. The output end of the reduction motor is fixed with a drive shaft penetrating into the housing. Inside the housing, a round seat, a power plate, a connecting body assembly, and a moving seat are arranged in sequence; The housing is provided with an operation slit. The round seat is provided with four equally spaced round seat holes. The welding seat body includes a moving column inserted into the round seat hole. The moving column is fixed with an arc-shaped bottom located in the operation slit. An installation seat is fixed on the arc-shaped bottom. A welding head located outside the housing is fixed on the installation seat. The other end of the moving column is fixedly installed with a limit head located outside the round seat hole. There are two symmetrically arranged protruding parts on the power plate. The protruding parts are in contact with the limit head. The drive shaft penetrates the round seat, and the power plate is fixed on the drive shaft; The connecting body assembly includes a jacket and a bottom shell fixedly connected. An internal tooth press is arranged inside the jacket. The connecting body assembly further includes an external tooth press arranged outside the round seat and adapted to the internal tooth press. The drive shaft is provided with threads. The moving seat is threadedly installed on the threads. Two pushing arms for pushing the connecting body assembly to move are fixed on both sides of the moving seat.

[0006] Preferably, the centers of the outer shell, the circular base, the power plate, the outer sleeve, the bottom shell and the moving seat coincide. The outer sleeve and the bottom shell are both arranged in contact with the inner wall of the outer shell, and there is a space for the outer sleeve to enter between the outer tooth press and the inner wall of the outer shell.

[0007] Preferably, the diameter of the limiting head is greater than the diameter of the circular base hole, the length of the moving column is greater than the length of the circular base hole, and a reinforcing plate made of metal is provided inside the power plate.

[0008] Preferably, one end of the outer shell is provided with a plug plate. A U-shaped frame is fixed between the plug plate and the outer shell, and an operation seam is formed between the plug plate and the outer shell. The radian of the arc bottom is the same as the radian of the operation seam, and the length of the arc bottom is greater than the depth of the operation seam.

[0009] Preferably, the drive shaft is provided with an extension part penetrating through the plug plate, and a guide body is fixed to the extension part.

[0010] Preferably, the mounting brackets are both fixed on the workbench. An electric sliding table is provided on the workbench, and the welding bracket is mounted on the electric sliding table. The mounting bracket includes a guiding inlet, and a pipe bracket is also fixed. The pipe is placed on the pipe bracket and enters the guiding inlet. The center of the drive shaft coincides with the center of the placed pipe.

[0011] Preferably, a limiting hoop is fixed on the mounting bracket, and a flange opening is formed between the limiting hoop and the guiding inlet.

[0012] Compared with the existing technology, the beneficial effects of the present invention are as follows: By providing four welding heads in this solution, with the rotation of the power plate, the convex parts will simultaneously push two symmetric welding seat bodies to move, so that the welding heads of these two welding seat bodies can perform symmetric spot welding. The symmetric two welding points can ensure that the stresses on both sides are the same, so that the welding stresses can cancel each other out as much as possible, thus ensuring the welding performance. Subsequently, through the moving connecting body assembly, the two welding heads can perform full welding on the weld seam, and the welding gap will be divided into two parts, enabling all welding to be completed quickly during welding. The temperatures of the two parts are quite the same during welding, avoiding the stress caused by thermal expansion and contraction due to temperature difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the mounting bracket of the present invention; Figure 3 is a schematic structural diagram of the welding bracket of the present invention; Figure 4 is an exploded view of the outer shell of the present invention; Figure 5 is a schematic diagram of another perspective of the outer shell in the figure; Figure 6Schematic cross-sectional structure diagram of the figure housing;

[0014] Reference numerals: 1, mounting frame; 2, welding frame; 3, reduction motor; 4, housing; 5, welding seat body; 6, round seat; 7, power plate; 8, connecting body assembly; 9, moving seat; 10, pushing arm; 11, guiding inlet; 12, pipe rack; 13, limiting hoop; 14, flange port; 41, operation seam; 51, moving column; 52, arc bottom; 53, mounting seat; 54, limiting head; 61, round seat hole; 71, convex portion; 81, outer sleeve; 82, bottom shell; 83, inner tooth press; 84, outer tooth press; 100, welding head; 200, drive shaft; 300, thread; 400, guiding body; 500, workbench; 600, electric slide; 700, plugging plate; 800, U-shaped frame. Detailed implementation manners

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0016] Referring to the attached Figure 1-6 , a flange circumferential seam welding device includes a mounting frame 1 and a movable welding frame 2. A reduction motor 3 and a housing 4 are fixed on the welding frame 2. The output end of the reduction motor 3 is fixed with a drive shaft 200 penetrating through the housing 4. Inside the housing 4, there are sequentially arranged a round seat 6, a power plate 7, a connecting body assembly 8 and a moving seat 9; The housing 4 is provided with an operation seam 41. The round seat 6 is provided with four equally spaced round seat holes 61. The welding seat body 5 includes a moving column 51 inserted into the round seat hole 61. The moving column 51 is fixed with an arc bottom 52 located in the operation seam 41. An installation seat 53 is fixed on the arc bottom 52. A welding head 100 located outside the housing 4 is fixed on the installation seat 53. The other end of the moving column 51 is fixedly installed with a limiting head 54, and the limiting head 54 is located outside the round seat hole 61. There are two symmetrically arranged convex portions 71 on the power plate 7, and the convex portions 71 are in contact with the limiting head 54. The drive shaft 200 penetrates through the round seat 6, and the power plate 7 is fixed on the drive shaft 200; The connecting body assembly 8 includes an outer sleeve 81 and a bottom shell 82 fixedly connected. An inner tooth press 83 is arranged inside the outer sleeve 81. The connecting body assembly 8 further includes an outer tooth press 84 arranged outside the round seat 6 and adapted to the inner tooth press 83. A thread 300 is arranged on the drive shaft 200, and the moving seat 9 is threadedly installed on the thread 300. Pushing arms 10 for pushing the connecting body assembly 8 to move are fixed on both sides of the moving seat 9.

[0017] The present invention provides four welding heads 100, and the four welding heads 100 are evenly distributed on the outer shell. Then, the four welding heads 100 are symmetrically arranged in pairs. By starting the reduction motor 3 to drive the drive shaft 200 to rotate, the power plate 7 will rotate. When the power plate 7 rotates, two symmetric convex portions 71 will contact two symmetric welding seat bodies 5, causing the convex portions 71 to squeeze the limit heads 54, making the moving columns 51 move outwards. In this way, these two welding heads 100 will first contact the flange and perform welding operations. These two welding points are also symmetric. Subsequently, as the power plate 7 continues to rotate, the convex portions 71 will squeeze the other two welding heads 100, making the other two welding points also symmetric. Then, when all the welding heads 100 have completed welding, the corresponding points on the flange and the pipe will be welded symmetrically. Through this synchronous symmetric welding method, two symmetric welding points are formed. The two symmetric welding points can ensure that the stresses on both sides are consistent, so that the welding stresses can cancel each other out as much as possible, thus ensuring the welding performance. The above method is the first step of welding in the present invention and can be called symmetric spot welding. After the first step is completed, the rotation of the drive shaft 200 will cause the moving seat 9 to move within the outer shell 4, and the push arm 10 will push the connecting body assembly 8 towards the operation seam 41. The movement of the outer sleeve 81 will cause the teeth of the inner tooth press 83 and the outer tooth press 84 to mesh with each other, and the power plate 7 will enter the bottom shell 82. The power plate 7 will be tightly inserted into the bottom shell 82. Finally, when the power plate 7 rotates, it will drive the connecting body assembly 8 to rotate. The rotation of the outer tooth press 84 will drive the circular seat 6 to rotate, causing two of the welding seat bodies 5 to rotate. The welding heads 100 on these two welding seat bodies 5 can perform re-welding on the flange and the pipe. Since these two welding heads 100 perform synchronous welding from two places, the welding gap between the flange and the pipe will be divided into two parts, enabling all welding to be completed quickly during welding. The temperatures of the two parts are quite the same during welding, avoiding the stress caused by thermal expansion and contraction due to temperature differences.

[0018] Specifically, the centers of the outer shell 4, the circular seat 6, the power plate 7, the outer sleeve 81, the bottom shell 82, and the moving seat 9 coincide. The outer sleeve 81 and the bottom shell 82 are both arranged in contact with the inner wall of the outer shell 4. There is a space for the outer sleeve 81 to enter between the outer tooth press 84 and the inner wall of the outer shell 4. The diameter of the limit head 54 is greater than the diameter of the circular seat hole 61, and the length of the moving column 51 is greater than the length of the circular seat hole 61. The power plate 7 is provided with a reinforcing plate made of metal. It should be noted that one end of the outer shell 4 is provided with a plug plate 700. A U-shaped frame 800 is fixed between the plug plate 700 and the outer shell 4. An operation slit 41 is formed between the plug plate 700 and the outer shell 4. The radian of the arc-shaped bottom 52 is the same as that of the operation slit 41. The length of the arc-shaped bottom 52 is greater than the depth of the operation slit 41. The drive shaft 200 is provided with an extension part penetrating through the plug plate 700, and a guide body 400 is fixed to the extension part. The mounting frame 1 is fixed on the workbench 500. An electric slide 600 is provided on the workbench 500. The welding frame 2 is mounted on the electric slide 600. The mounting frame 1 includes a guiding inlet 11 and also fixes a pipe rack 12. The pipe is placed on the pipe rack 12 and enters into the guiding inlet 11. The axis of the drive shaft 200 coincides with the center of the placed pipe. A limiting hoop 13 is fixed on the mounting frame 1. A flange opening 14 is formed between the limiting hoop 13 and the guiding inlet 11.

[0019] Working principle: First step, place the pipe on the pipe rack 12 so that the end of the pipe to be welded is inserted into the guiding inlet 11 and is located in the flange opening 14. Then insert the flange sleeve into the flange opening 14 so that the flange sleeve is outside the pipe. Finally, tighten the limiting hoop 13 to make them stable. Second step, start the electric slide 600 to make the welding frame 2 move towards the mounting frame 1. During the movement, the guide body 400 will enter the pipe and contact the inner wall of the pipe. As the guide body 400 completely enters, the welding head 100 will align with the welding gap between the pipe and the flange. Third step, start the reduction motor 3 to drive the drive shaft 200 to rotate. The rotation of the drive shaft 200 will drive the power plate 7 to rotate. The rotation of the power plate 7 will push two symmetric limiting heads 54 through the protrusion 71, so that the limiting heads 54 push the moving column 51 to move towards the operation slit 41 in the round seat hole 61, making the arc-shaped bottom 52 move out of the operation slit 41. The movement of the arc-shaped bottom 52 drives the mounting seat 53 to move, so that the two welding heads 100 contact the welding gap between the pipe and the flange. Start these two welding heads 100 for welding. As the power plate 7 continues to rotate, the protrusion 71 will then push the other two limiting heads 54 to move, so that the other two welding heads 100 perform welding, thus forming symmetric spot welding on the welding gap between the pipe and the flange. Fourthly, with the continuous rotation of the drive shaft 200, the moving seat 9 will move along the thread 300 towards the operation seam 41. The moving seat 9 will push the outer sleeve 81 and the bottom shell 82 to move, so that the inner tooth press 83 inside the outer sleeve 81 and the outer tooth press 84 outside the circular seat 6 are engaged with each other. The power plate 7 will be inserted into the bottom shell 82, and the power plate 7 will drive the bottom shell 82 to rotate. Thus, the bottom shell 82 drives the outer sleeve 81 to rotate. Through the engagement of the inner tooth press 83 and the outer tooth press 84, the circular seat 6 will be driven to rotate. At this time, the convex part 71 will push two of the welding seat bodies 5 to move outwards, so that the welding heads 100 of these two welding seat bodies 5 perform rotational welding, and thus the welding of all the weld seams is completed.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0022] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A flange circumferential seam welding device, characterized in that: It comprises a mounting frame (1) and a movable welding frame (2), a reduction motor (3) and a housing (4) are fixed on the welding frame (2), a driving shaft (200) penetrating the housing (4) is fixed to the output end of the reduction motor (3), and a round seat (6), a power plate (7), a joint assembly (8) and a movable seat (9) are sequentially arranged in the housing (4); The housing (4) is provided with an operating slit (41), the round seat (6) is provided with four round seat holes (61) distributed at equal intervals, the welding seat body (5) comprises a movable column (51) inserted into the round seat hole (61), the movable column (51) is fixed with an arc-shaped bottom (52) located in the operating slit (41), a mounting seat (53) is fixed on the arc-shaped bottom (52), a welding head (100) located outside the housing (4) is fixed on the mounting seat (53), a limit head (54) is fixedly installed on the other end of the movable column (51), the limit head (54) is located outside the round seat hole (61), two symmetrically arranged protrusions (71) are provided on the power plate (7), the protrusions (71) and the limit head (54) are in contact, the driving shaft (200) passes through the round seat (6), and the power plate (7) is fixed on the driving shaft (200); The connected component (8) comprises an outer shell (81) and a bottom shell (82) which are fixedly connected, an inner gear press (83) is provided inside the outer shell (81), and the connected component (8) further comprises an outer gear press (84) which is arranged outside the round seat (6) and is adapted to the inner gear press (83), a thread (300) is provided on the drive shaft (200), the movable seat (9) is threadedly mounted on the thread (300), and push arms (10) for pushing the connected component (8) to move are fixed on both sides of the movable seat (9).

2. A flange circumferential seam welding device according to claim 1, characterized in that: The centers of the outer shell (4), the round seat (6), the power plate (7), the outer shell (81), the bottom shell (82) and the movable seat (9) coincide with each other; the outer shell (81) and the bottom shell (82) are both arranged to fit the inner wall of the outer shell (4); and there is a space between the outer tooth pressure (84) and the inner wall of the outer shell (4) for the outer shell (81) to enter.

3. A flange circumferential seam welding device according to claim 1, characterized in that: The diameter of the limit head (54) is greater than the diameter of the round seat hole (61), the length of the movable column (51) is greater than the length of the round seat hole (61), and a reinforcing plate made of a metal material is provided inside the power plate (7).

4. A flange circumferential seam welding device according to claim 1, characterized in that: A blocking plate (700) is provided at one end of the outer shell (4); a U-shaped frame (800) is fixed between the blocking plate (700) and the outer shell (4); an operating slit (41) is formed between the blocking plate (700) and the outer shell (4); the curvature of the arc-shaped bottom (52) is consistent with the curvature of the operating slit (41); and the length of the arc-shaped bottom (52) is greater than the depth of the operating slit (41).

5. A flange circumferential seam welding device according to claim 4, characterized in that: The driving shaft (200) is provided with an extension portion penetrating the blocking plate (700), and a guide body (400) is fixed to the extension portion.

6. A flange circumferential seam welding device according to claim 5, characterized in that: The mounting frame (1) and are both fixed on a workbench (500), an electric slide (600) is provided on the workbench (500), the welding frame (2) is installed on the electric slide (600), the mounting frame (1) includes an inlet (11), and is also fixed with a pipe rack (12), the pipe is placed on the pipe rack (12) and enters the inlet (11), and the driving shaft (200) and the center of the pipe after placement coincide with each other.

7. A flange circumferential seam welding device according to claim 5, characterized in that: A limiting hoop (13) is fixed on the mounting frame (1), and a flange opening (14) is formed between the limiting hoop (13) and the introduction opening (11).

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