High-efficiency automatic welding device for super-large diameter spiral seam welded pipe

Abstract

This utility model relates to the field of welding equipment technology, and proposes a high-efficiency automatic welding device for ultra-large diameter spiral welded pipes. It includes a frame, with several support seats fixedly connected to the bottom of the frame. Support wheels are rotatably connected to both sides of the top of each support seat, and the support wheels on the same side are coaxially fixedly connected. A welding mechanism is installed on the frame, including a lead screw with a movable seat threaded onto it. A servo motor is fixedly mounted at one end of the frame, and the output shaft of the servo motor is fixedly connected to the lead screw. A welding assembly is installed at one end of the movable seat, and a dust collection assembly is installed at the bottom of the movable seat. A transmission mechanism is installed at one end of the frame. This utility model, through a servo motor-driven lead screw mechanism and a synchronous transmission system, achieves automatic movement of the welding torch along the spiral weld seam and synchronous control of the pipe rotation. This eliminates the need for traditional manual operation, improves welding speed and positioning accuracy, and effectively enhances welding efficiency.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, specifically to a high-efficiency automatic welding device for ultra-large diameter spiral welded pipes. Background Technology

[0002] Spiral welded pipe is made by rolling low-carbon structural steel or low-alloy structural steel strip into a pipe blank at a certain spiral angle (called the forming angle), and then welding the pipe seam together. It can produce large-diameter steel pipes with narrower steel strips, which requires corresponding welding equipment.

[0003] A search revealed that an existing patent (publication number: CN215699399U) discloses "a butt welding device for producing spiral seam welded pipes, comprising a frame device for support, an adjustment device for rotating and adjusting the angle installed on the frame device, and a positioning device for supporting the spiral seam welded pipe installed on the frame device and the adjustment device; the frame device includes a support platform, three support legs evenly distributed at the bottom of the support platform, a support shaft welded in the middle of the support platform, and a sliding groove with an arc shape on one side of the support shaft; the positioning device includes a fixed frame and a movable frame, two V-shaped grooves symmetrically arranged on the top of the fixed frame and the movable frame, and the tops of the fixed frame and the movable frame are flush."

[0004] The technical solution of the aforementioned patent mainly involves positioning the spiral welded pipe, but it still requires manual welding with a welding torch. This method has the following technical drawbacks:

[0005] First, during welding, workers need to manually adjust the welding torch to move along the spiral weld seam, and the synchronous rotation of the welded pipe requires additional drive equipment. The ultra-large diameter welded pipe has a large self-weight (often tens of tons), the manual positioning accuracy is low, the welding speed is limited, and the production cycle of a single pipe can be as long as several hours.

[0006] Secondly, most existing equipment adopts a split design, with the movement of the welding torch and the rotation of the welding pipe controlled by an independent motor. Due to mechanical transmission errors and differences in inertia, the welding torch and the weld are prone to misalignment, resulting in defects such as weld burn-through and incomplete welding. The cost of repairing ultra-large pipes is extremely high.

[0007] Third, the welding process generates a large amount of fumes containing heavy metals. Existing equipment lacks an integrated dust removal solution, and workers need to wear heavy protective equipment, but it is still difficult to avoid the risk of pneumoconiosis. Furthermore, the reduced visibility in the workshop further affects the accuracy of operation.

[0008] In view of this, this utility model proposes a high-efficiency automatic welding device for ultra-large diameter spiral welded pipes. Summary of the Invention

[0009] This invention proposes a high-efficiency automatic welding device for ultra-large diameter spiral welded pipes, which solves the problems of low operation accuracy and low welding efficiency of manual welding torches in the prior art.

[0010] To solve the above problems, the technical solution of this utility model is as follows:

[0011] A high-efficiency automatic welding device for ultra-large diameter spiral welded pipes includes a frame. Several support seats, evenly distributed along the length of the frame, are fixedly connected to the bottom of the frame. Support wheels for placing spiral welded pipes are rotatably connected to both sides of the top of each support seat. Several support wheels on the same side are coaxially fixedly connected. A welding mechanism is installed on the frame. The welding mechanism includes a lead screw rotatably connected to the inside of the frame. A movable seat is threaded onto the lead screw. A guide rod passing through the movable seat is slidably connected to the top of the movable seat. Both ends of the guide rod are fixedly connected to the frame. A servo motor is fixedly installed at one end of the frame. The output shaft of the servo motor is fixedly connected to the lead screw. A welding assembly for welding spiral welded pipes is installed at one end of the movable seat. A dust-collecting assembly for dust removal is installed at the bottom of the movable seat, cooperating with the movement of the movable seat. A transmission mechanism is installed at one end of the frame, cooperating with the start of the servo motor to drive all support wheels to rotate.

[0012] Preferably, the top of the frame is fixedly connected to a plurality of first cylinders that are equidistantly distributed along the length of the frame, the output ends of the plurality of first cylinders are fixedly connected to mounting bases, and pressure rollers are rotatably connected to the plurality of mounting bases.

[0013] Preferably, the welding assembly includes a second cylinder fixedly connected to the outside of the movable seat. The output end of the second cylinder is fixedly connected to a mounting plate. The bottom end of the mounting plate is slidably connected to two sliding rods that penetrate the mounting plate. One end of the two sliding rods is fixedly connected to a connecting plate. One side of the connecting plate is fixedly connected to a welding gun. The other end of each of the two sliding rods is fixedly connected to a stop block. Each of the two sliding rods is fitted with a spring, and the two springs are respectively disposed between the connecting plate and the mounting plate.

[0014] Preferably, the vacuuming assembly includes a vacuum box fixedly connected to the bottom of the movable seat, a rotating shaft rotatably connected to the inner side of the vacuum box, a suction impeller fixedly connected to one end of the rotating shaft, a filter element disposed in the middle of the inner side of the vacuum box, and a linkage component disposed at the other end of the rotating shaft to drive the rotating shaft to rotate by cooperating with the movement of the movable seat.

[0015] Preferably, a plurality of exhaust holes are provided on one side of the dust collection box, and the plurality of exhaust holes are arrayed on the side wall of the dust collection box.

[0016] Preferably, the linkage includes a first gear fixedly connected to the end of the rotating shaft, a second gear rotatably connected to the outer side of the movable seat and meshing with the first gear, the second gear having a greater number of teeth than the first gear, a third gear fixedly connected to the second gear on the same axis, and a toothed plate fixedly connected to the inner side of the frame and arranged parallel to the lead screw, the third gear meshing with the toothed plate.

[0017] Preferably, the guide rod and the lead screw are arranged parallel to each other, and both have the same length.

[0018] Preferably, the transmission mechanism includes a bracket fixedly connected to the bottom of the frame, a fourth gear rotatably connected to the top of the bracket, and a fifth gear coaxially fixedly connected to the ends of two support wheels near the fourth gear. Both fifth gears mesh with the fourth gear. A first pulley is coaxially fixedly connected to the fourth gear, and a second pulley is fixedly connected to the output shaft of the servo motor. The second pulley and the first pulley are connected by belt drive.

[0019] The working principle and beneficial effects of this utility model are as follows:

[0020] 1. By using a servo motor-driven screw mechanism and synchronous transmission system, the automatic movement of the welding torch along the spiral weld seam and the synchronous control of the welded pipe rotation are achieved. This eliminates the need for traditional manual operation, significantly improves welding speed, and greatly shortens the production cycle of a single pipe from several hours. Compared with existing split-type equipment (independent motor control of welding torch and welded pipe), this design reduces equipment complexity and inertial error, avoids production interruption, and is suitable for mass production scenarios.

[0021] 2. The parallel cooperation between the guide rod and the lead screw ensures the stability of the moving seat's trajectory, avoiding defects such as incomplete welding or burn-through caused by welding gun deviation; the elastic design of the welding components further adapts to weld changes and improves welding consistency.

[0022] 3. The movement of the movable seat causes the linkage to drive the suction impeller to rotate, generating negative pressure to draw in smoke and dust; after purification by the filter element, clean air is discharged through the exhaust port. The whole process does not require an additional power source and directly utilizes the mechanical energy of the moving seat; it solves the problem of workers facing the risk of pneumoconiosis due to the lack of integrated dust removal in traditional equipment. Attached Figure Description

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1 This is a schematic diagram of the structure of the high-efficiency automatic welding device for ultra-large diameter spiral welded pipes according to an embodiment of the present invention. Figure 1 ;

[0025] Figure 2This is a schematic diagram of the structure of the high-efficiency automatic welding device for ultra-large diameter spiral welded pipes according to an embodiment of the present invention. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the welding mechanism according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the welding assembly according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the dust collection component according to an embodiment of the present utility model;

[0029] Figure 6 This is a schematic diagram of the linkage component according to an embodiment of the present utility model;

[0030] Figure 7 This is a schematic diagram of the transmission mechanism according to an embodiment of the present utility model.

[0031] In the diagram: 1. Frame; 2. Support base; 3. Support wheel; 4. First cylinder; 5. Mounting base; 6. Pressure roller; 7. Welding mechanism; 71. Lead screw; 72. Movable seat; 73. Guide rod; 74. Servo motor; 75. Welding assembly; 751. Second cylinder; 752. Mounting plate; 753. Slide rod; 754. Connecting plate; 755. Welding torch; 756. Stop block; 757. Spring; 76. Dust collection assembly; 761. Dust collection box; 762. Rotating shaft; 763. Suction impeller; 764. Filter element; 765. Exhaust port; 766. Linkage component; 7661. First gear; 7662. Second gear; 7663. Third gear; 7664. Gear plate; 8. Transmission mechanism; 81. Bracket; 82. Fourth gear; 83. Fifth gear; 84. First pulley; 85. Second pulley; 10. Spiral seam welded pipe. Detailed Implementation

[0032] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0033] Examples, such as Figures 1-7As shown, this embodiment proposes an efficient automatic welding device for ultra-large diameter spiral welded pipes, including a frame 1. The bottom end of the frame 1 is fixedly connected to a plurality of support seats 2 that are equidistantly distributed along the length of the frame 1. Both sides of the top of the support seats 2 are rotatably connected to support wheels 3 for placing spiral welded pipes 10. The plurality of support wheels 3 on the same side are coaxially fixedly connected. The top of the frame 1 is fixedly connected to a plurality of first cylinders 4 that are equidistantly distributed along the length of the frame 1. The output ends of the plurality of first cylinders 4 are fixedly connected to mounting seats 5. The inner sides of the plurality of mounting seats 5 are rotatably connected to pressure rollers 6.

[0034] By controlling the first cylinder 4 to drive the mounting base 5 to move downward, the pressure roller 6 moves downward and applies pressure to the top of the spiral welded pipe. In conjunction with the support roller 3, the spiral welded pipe can be clamped to ensure that the spiral welded pipe remains stable in the subsequent welding process.

[0035] A welding mechanism 7 is provided on the frame 1. The welding mechanism 7 includes a lead screw 71 rotatably connected to the inside of the frame 1. A movable seat 72 is threadedly connected to the lead screw 71. A guide rod 73 is slidably connected to the top of the movable seat 72 and passes through the movable seat 72. The two ends of the guide rod 73 are fixedly connected to the frame 1. The guide rod 73 and the lead screw 71 are arranged parallel to each other and have the same length. A servo motor 74 is fixedly installed at one end of the frame 1. The output shaft of the servo motor 74 is fixedly connected to the lead screw 71. A welding assembly 75 for welding spiral seam welded pipes is provided at one end of the movable seat 72. A dust collection assembly 76 for dust removal is provided at the bottom of the movable seat 72 in conjunction with the movement of the movable seat 72. A transmission mechanism 8 is provided at one end of the frame 1 to drive all support wheels 3 to rotate in conjunction with the start of the servo motor 74.

[0036] By activating the servo motor 74 to drive the lead screw 71 to rotate, and under the constraint of the guide rod 73, the movable seat 72 rotates relative to the lead screw 71. This causes the movable seat 72 to move along the axis of the lead screw 71, and the welding assembly 75 to translate along the axis of the spiral seam welded pipe. At the same time, the transmission mechanism 8 drives all the support wheels 3 to rotate, so that all the support wheels 3 apply rotational force to the spiral seam welded pipe, which causes the spiral seam welded pipe to rotate. Thus, the welding assembly 75 can perform spiral welding along the spiral seam welded pipe. The whole process does not require manual operation, but realizes the automatic welding of the spiral seam welded pipe, which greatly improves the welding efficiency.

[0037] Furthermore, the welding assembly 75 includes a second cylinder 751 fixedly connected to the outside of the movable seat 72. The output end of the second cylinder 751 is fixedly connected to a mounting plate 752. The bottom end of the mounting plate 752 is slidably connected to two sliding rods 753 that pass through the mounting plate 752. One end of the two sliding rods 753 is fixedly connected to a connecting plate 754. One side of the connecting plate 754 is fixedly connected to a welding torch 755. The other end of each of the two sliding rods 753 is fixedly connected to a stop block 756. A spring 757 is sleeved on each of the two sliding rods 753. The two springs 757 are respectively disposed between the connecting plate 754 and the mounting plate 752.

[0038] By controlling the second cylinder 751 to drive the mounting plate 752 to move, the welding torch 755 moves closer to the spiral welded pipe and contacts the weld seam, thus enabling welding of spiral welded pipes of different diameters. The design of the spring 757 ensures that the welding torch 755 and the spiral welded pipe are in elastic contact, which ensures that the welding torch 755 can smoothly weld along the spiral weld seam during the rotation of the spiral welded pipe, avoiding the problem of the welding torch 755 getting stuck or breaking due to rigid contact between the welding torch 755 and the spiral welded pipe.

[0039] Furthermore, the vacuuming assembly 76 includes a vacuum box 761 fixedly connected to the bottom of the movable base 72. A rotating shaft 762 is rotatably connected to the inner side of the vacuum box 761. One end of the rotating shaft 762 is fixedly connected to a suction impeller 763. A filter element 764 is detachably installed in the middle of the inner side of the vacuum box 761. Several exhaust holes 765 are opened on one side of the vacuum box 761. The exhaust holes 765 are arrayed on the side wall of the vacuum box 761. The other end of the rotating shaft 762 is provided with a mechanism that drives the rotating shaft 763 to rotate by cooperating with the movement of the movable base 72. The linkage 766 that enables the rotation of shaft 762 includes a first gear 7661 fixedly connected to the end of shaft 762, a second gear 7662 rotatably connected to the outer side of movable seat 72 and meshing with the first gear 7661, the second gear 7662 having more teeth than the first gear 7661, a third gear 7663 fixedly connected to the second gear 7662 coaxially, and a toothed plate 7664 fixedly connected to the inner side of frame 1 and arranged parallel to lead screw 71, the third gear 7663 meshing with toothed plate 7664.

[0040] During welding, the servo motor 74 drives the lead screw 71 to rotate. Under the constraint of the guide rod 73, the movable seat 72 rotates relative to the lead screw 71. This causes the movable seat 72 to move along the axis of the lead screw 71, causing the third gear 7663 to roll along the gear plate 7664. The third gear 7663 drives the second gear 7662 to rotate synchronously, causing the first gear 7661 to rotate synchronously. This causes the suction impeller 763 to rotate, reducing the air inlet pressure of the dust collection box 761. As a result, the dust generated during welding is drawn into the dust collection box 761 through the air inlet and purified by the filter element 764. This prevents welding dust from mixing into the air and causing pollution, which could affect the health of the workers.

[0041] Furthermore, the transmission mechanism 8 includes a bracket 81 fixedly connected to the bottom end of the frame 1. A fourth gear 82 is rotatably connected to the top of the bracket 81. A fifth gear 83 is coaxially fixedly connected to the ends of the two support wheels 3 near the fourth gear 82. Both fifth gears 83 mesh with the fourth gear 82. A first pulley 84 is coaxially fixedly connected to the fourth gear 82. A second pulley 85 is also fixedly connected to the output shaft of the servo motor 74. The second pulley 85 and the first pulley 84 are connected by belt drive.

[0042] Working principle: First, by controlling the first cylinder 4, the mounting seat 5 is driven to move downward, so that the pressure roller 6 moves downward and applies pressure to the top of the spiral welded pipe. In conjunction with the support roller 3, the spiral welded pipe can be clamped to ensure that the spiral welded pipe remains stable in the subsequent welding process.

[0043] Then, the second cylinder 751 is controlled to drive the mounting plate 752 to move, causing the welding torch 755 to approach the spiral seam welded pipe and contact the weld seam. Then, the servo motor 74 is activated to drive the lead screw 71 to rotate. Under the constraint of the guide rod 73, the movable seat 72 rotates relative to the lead screw 71, causing the movable seat 72 to move along the axis of the lead screw 71, thus moving the welding torch 755 along the spiral seam welded pipe. The servo motor 74 drives the second pulley 85 to rotate, which in turn drives the first pulley 84 to rotate the fourth gear 82. This causes the two fifth gears 83 to rotate synchronously and in the same direction, which in turn causes all the support wheels 3 to rotate synchronously. This causes all the support wheels 3 to apply rotational force to the spiral welded pipe, which causes the spiral welded pipe to rotate. As a result, the welding torch 755 can perform spiral welding along the spiral welded pipe. The whole process does not require manual operation, realizing automatic welding of the spiral welded pipe and greatly improving welding efficiency.

[0044] During the movement of the movable seat 72, the third gear 7663 rolls along the toothed plate 7664, causing the third gear 7663 to drive the second gear 7662 to rotate synchronously, which in turn causes the first gear 7661 to rotate synchronously. Since the number of teeth of the second gear 7662 is greater than that of the first gear 7661, the suction impeller 763 rotates at high speed, which reduces the air inlet pressure of the dust collection box 761. This allows the air inlet of the dust collection box 761 to draw the fumes generated during the welding process into the dust collection box 761, where they are then purified by the filter element 764. This prevents welding fumes from mixing into the air and causing pollution, which could affect the health of the workers.

[0045] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high-efficiency automatic welding device for ultra-large diameter spiral welded pipes, characterized in that, include Frame (1); Several support seats (2) are fixedly connected to the bottom end of the frame (1) and are equidistantly distributed along the length of the frame (1); Support wheels (3) are rotatably connected to both sides of the top of the support base (2) and used to place the spiral welded pipe (10). Several support wheels (3) on the same side are coaxially fixedly connected. A welding mechanism (7) is provided on the frame (1), the welding mechanism (7) comprising: Rotate the lead screw (71) connected to the inside of the frame (1). A movable seat (72) is threaded onto the lead screw (71); A guide rod (73) is slidably connected to the top of the movable seat (72) and passes through the movable seat (72), and both ends of the guide rod (73) are fixedly connected to the frame (1); A servo motor (74) is fixedly connected to one end of the frame (1), and the output shaft of the servo motor (74) is fixedly connected to the lead screw (71); A welding assembly (75) is disposed at one end of the movable seat (72) and is used for welding spiral seam welded pipes. A dust collection assembly (76) is disposed at the bottom of the movable seat (72) and performs dust removal by cooperating with the movement of the movable seat (72). A transmission mechanism (8) is located at one end of the frame (1) and drives all support wheels (3) to rotate by cooperating with the start of the servo motor (74).

2. The high-efficiency automatic welding device for ultra-large diameter spiral welded pipes according to claim 1, characterized in that, The top of the frame (1) is fixedly connected to a number of first cylinders (4) that are equidistantly distributed along the length of the frame (1). The output ends of the first cylinders (4) are all fixedly connected to mounting bases (5). Pressure rollers (6) are rotatably connected to the mounting bases (5).

3. The high-efficiency automatic welding device for ultra-large diameter spiral welded pipes according to claim 2, characterized in that, The welding assembly (75) includes a second cylinder (751) fixedly connected to the outside of the movable seat (72). The output end of the second cylinder (751) is fixedly connected to a mounting plate (752). The bottom end of the mounting plate (752) is slidably connected to two sliding rods (753) that pass through the mounting plate (752). One end of the two sliding rods (753) is fixedly connected to a connecting plate (754). One side of the connecting plate (754) is fixedly connected to a welding torch (755). The other end of the two sliding rods (753) is fixedly connected to a stop block (756). A spring (757) is sleeved on each of the two sliding rods (753). The two springs (757) are respectively disposed between the connecting plate (754) and the mounting plate (752).

4. The high-efficiency automatic welding device for ultra-large diameter spiral welded pipes according to claim 1, characterized in that, The vacuuming assembly (76) includes a vacuum box (761) fixedly connected to the bottom of the movable seat (72). A rotating shaft (762) is rotatably connected to the inner side of the vacuum box (761). A suction impeller (763) is fixedly connected to one end of the rotating shaft (762). A filter element (764) is provided in the middle of the inner side of the vacuum box (761). A linkage (766) is provided at the other end of the rotating shaft (762) to drive the rotating shaft (762) to rotate by cooperating with the movement of the movable seat (72).

5. The high-efficiency automatic welding device for ultra-large diameter spiral welded pipes according to claim 4, characterized in that, The dust collection box (761) has several exhaust holes (765) on one side, and the exhaust holes (765) are arranged in an array on the side wall of the dust collection box (761).

6. The high-efficiency automatic welding device for ultra-large diameter spiral welded pipes according to claim 5, characterized in that, The linkage (766) includes a first gear (7661) fixedly connected to the end of the rotating shaft (762), a second gear (7662) meshing with the first gear (7661) is rotatably connected to the outer side of the movable seat (72), the second gear (7662) has more teeth than the first gear (7662), a third gear (7663) is fixedly connected to the second gear (7662) coaxially, and a toothed plate (7664) is fixedly connected to the inner side of the frame (1) and is parallel to the lead screw (71), and the third gear (7663) meshes with the toothed plate (7664).

7. The high-efficiency automatic welding device for ultra-large diameter spiral welded pipes according to claim 1, characterized in that, The guide rod (73) is arranged parallel to the lead screw (71), and the two have the same length.

8. The high-efficiency automatic welding device for ultra-large diameter spiral welded pipes according to claim 1, characterized in that, The transmission mechanism (8) includes a bracket (81) fixedly connected to the bottom of the frame (1). A fourth gear (82) is rotatably connected to the top of the bracket (81). A fifth gear (83) is coaxially fixedly connected to the ends of two support wheels (3) near the fourth gear (82). Both fifth gears (83) mesh with the fourth gear (82). A first pulley (84) is coaxially fixedly connected to the fourth gear (82). A second pulley (85) is also fixedly connected to the output shaft of the servo motor (74). The second pulley (85) and the first pulley (84) are connected by belt drive.

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