Automatic double-sided submerged arc welding machine for preparing spiral submerged arc welding steel pipe

Abstract

The invention discloses a spiral submerged arc welding steel pipe standby automatic double-face submerged arc welding machine which comprises a connecting frame and a moving frame, an adjusting assembly is installed outside the moving frame and comprises a vertically-arranged first lead screw, the first lead screw is rotationally connected into the moving frame, and the outer portion of the first lead screw is in threaded connection with a mounting frame; the mounting frame is slidably arranged outside the moving frame in a sleeving mode, a horizontally-arranged second lead screw is rotatably connected to the interior of the mounting frame, a mounting base is in threaded connection with the exterior of the second lead screw, the mounting frame is slidably arranged outside the mounting base in a sleeving mode, and driving structures are installed outside the moving frame and the mounting frame correspondingly and comprise a first motor and a second motor; by arranging the adjusting assembly, the double-face welding device can adapt to double-face welding work of steel pipes with different diameters and different screw pitches, so that it is guaranteed that the device can machine the steel pipes with different specifications, and the adaptability of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe preparation, and specifically to an automatic double-sided submerged arc welding machine for the preparation of spiral submerged arc welded steel pipes. Background Technique

[0002] Spiral submerged arc welded steel pipes are pipes widely used in the fields of fluid transportation such as oil, natural gas, water, and building structures. It is formed by spirally curling strip steel and welding it using the submerged arc welding process. The automatic double-sided submerged arc welding machine is a key device in the production process of spiral submerged arc welded steel pipes. Its main function is to perform double-sided automatic submerged arc welding on the butt joint of the strip steel during the forming process of the steel pipe.

[0003] After retrieval, the invention with the Chinese patent publication number CN209850076U discloses that by arranging welding machines on both sides of the tank wall, the tank wall is stressed simultaneously on the left and right, the equipment has good stability and is safer, and the bending deformation of the tank wall is small. The double-sided welding heads on both sides of the tank wall perform double-sided welding of the weld seams simultaneously, and the double-sided welding is carried out simultaneously without the need for crane lifting.

[0004] However, in the actual application process, this device has certain limitations. It can only meet the double-sided welding requirements for short distances, and it is difficult to adapt to the diverse needs of steel pipes with different diameters and pitches in various processing scenarios, and its operation flexibility is poor. Especially when preparing spiral steel pipes, due to the diverse specifications of steel pipes and complex welding requirements, this device has obvious deficiencies in terms of adaptability. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic double-sided submerged arc welding machine for the preparation of spiral submerged arc welded steel pipes to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An automatic double-sided submerged arc welding machine for the preparation of spiral submerged arc welded steel pipes, including a connection frame and a moving frame. An adjustment assembly is installed outside the moving frame. The adjustment assembly includes a vertically arranged lead screw 1, which is rotatably connected inside the moving frame. An installation frame is threadedly connected to the outside of the lead screw 1. The installation frame is slidably sleeved outside the moving frame. A horizontally arranged lead screw 2 is rotatably connected inside the installation frame. An installation seat is threadedly connected to the outside of the lead screw 2. The installation seat is slidably sleeved outside the installation frame. Drive structures are installed outside both the moving frame and the installation frame. The drive structures include a motor 1 and a motor 2.

[0007] It can adapt to the double-sided welding work of steel pipes with different diameters and pitches, thus ensuring that the device can process steel pipes of different specifications, which is beneficial to improving the adaptability of the device. For example, when the diameter of the steel pipe is large, start the first motor to control the rotation of the first lead screw. The mounting frame sleeved outside the moving frame can only move up and down. The first lead screw can drive the mounting frame to move upward along the moving frame. When the pitch of the weld of the steel pipe is large, start the second motor to control the rotation of the second lead screw. Similarly, the second lead screw can drive the mounting seat to move horizontally along the mounting frame. Furthermore, the position of the welding torch installed at the bottom of the mounting seat will also change until the welding wires of the two welding torches can be aligned with the welds on the back and surface of the steel pipe.

[0008] As a further preferred embodiment of the present technical solution, the first motor is fixedly installed on the outer wall of the bottom of the moving frame, the output end of the first motor is coaxially fixed with one end of the first lead screw, the second motor is fixedly installed on the outer wall of one side of the mounting frame, and the output end of the second motor is coaxially fixed with one end of the second lead screw.

[0009] As a further preferred embodiment of the present technical solution, a flipping structure is installed at one end of the bottom of the moving frame, and the flipping structure includes a support column rotatably connected inside the moving frame. A first bevel gear is coaxially fixed outside the support column. A stepping motor is fixedly installed on the outer wall of one end of the moving frame, and a second bevel gear is coaxially fixed at the output end of the stepping motor. The second bevel gear meshes with the first bevel gear.

[0010] As a further preferred embodiment of the present technical solution, a welding torch is installed on the outer wall of the bottom of the mounting seat and on the outer wall of one side of the support column. A wire feeding structure and a flux delivery pipe are also provided inside the welding torch. A smoking component is installed at the bottom of both welding torches.

[0011] As a further preferred embodiment of the present technical solution, the smoking component includes a baffle fixedly connected to the outer wall of the bottom of the welding torch. An air suction ring is fixedly connected to the inner wall of the top of the baffle. A number of suction holes are equidistantly distributed outside the air suction ring. A connecting pipe is fixedly inserted into the baffle, and one end of the connecting pipe is communicated with the air suction ring.

[0012] Start the external air suction fan. The air inside the air suction ring is drawn out through the connecting pipe, and a negative pressure will be generated at the suction ports outside the air suction ring. The fumes generated during the welding process will first be collected by the baffle and then absorbed by the air suction ring, which can avoid the fumes from affecting the working environment.

[0013] As a further preferred embodiment of the present technical solution, a driving component is installed between the connecting frame and the moving frame. The driving component includes a third lead screw rotatably connected inside the connecting frame. A moving seat is threadedly connected to the outside of the third lead screw. The moving seat is slidably connected inside the connecting frame. A third motor is fixedly installed on the outer wall of one side of the connecting frame, and the output end of the third motor is coaxially fixed with one end of the third lead screw. The moving frame is fixedly connected to the outside of the moving seat.

[0014] As a further preference of this technical solution, a connecting plate is provided at each of the four corners of the connecting frame, and a through hole is provided inside each of the four connecting plates.

[0015] The present invention provides an automatic double-sided submerged arc welding machine for the preparation of spiral submerged arc welded pipes, which has the following beneficial effects: (1) By providing an adjustment component, the present invention can adapt to the double-sided welding work of pipes with different diameters and pitches, thereby ensuring that the device can process pipes of different specifications, which is beneficial to improving the adaptability of the device. For example, when the diameter of the pipe is relatively large, starting the first motor to control the rotation of the first lead screw, the mounting frame sleeved outside the moving frame can only move up and down, and the first lead screw can drive the mounting frame to move upward along the moving frame. When the pitch of the weld of the pipe is relatively large, starting the second motor to control the rotation of the second lead screw, similarly, the second lead screw can drive the mounting seat to move horizontally along the mounting frame, and then the position of the welding torch installed at the bottom of the mounting seat will also change until the welding wires of the two welding torches can be directly opposite the welds on the back and surface of the pipe.

[0016] (2) By providing a smoking component, when starting the external suction fan, the air inside the suction ring is evacuated through the connecting pipe, and a negative pressure will be generated at the suction ports outside the suction ring. The fumes generated during the welding process will first be collected by the baffle and then absorbed by the suction ring, which can avoid the influence of the fumes on the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the whole of the present invention from the first perspective; Figure 2 is a schematic structural diagram of the whole of the present invention from the second perspective; Figure 3 is a schematic structural diagram of the whole of the present invention from the third perspective; Figure 4 is of the present invention Figure 3 amplified structural diagram at A in; In the figure: 1, connecting frame; 2, connecting plate; 3, moving frame; 4, adjustment component; 5, smoking component; 6, driving component; 7, welding torch; 401, first lead screw; 402, mounting frame; 403, first motor; 404, second lead screw; 405, second motor; 406, mounting seat; 407, support column; 408, first bevel gear; 409, stepping motor; 410, second bevel gear; 501, baffle; 502, suction ring; 503, connecting pipe; 601, third lead screw; 602, moving seat; 603, third motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention.

[0019] The present invention provides a technical solution: As Figure 1 and Figure 3 shown, in this embodiment, an automatic double-sided submerged arc welding machine for preparing spiral submerged arc welded pipes includes a connecting frame 1 and a moving frame 3. An adjusting assembly 4 is installed outside the moving frame 3. The adjusting assembly 4 includes a vertically arranged lead screw 401 which is rotatably connected inside the moving frame 3. A mounting frame 402 is threadedly connected to the outside of the lead screw 401. The mounting frame 402 is slidably sleeved outside the moving frame 3. A horizontally arranged lead screw 404 is rotatably connected inside the mounting frame 402. A mounting seat 406 is threadedly connected to the outside of the lead screw 404. The mounting seat 406 is slidably sleeved outside the mounting frame 402. Driving structures are installed outside both the moving frame 3 and the mounting frame 402. The driving structures include a first motor 403 and a second motor 405.

[0020] The first motor 403 is fixedly installed on the bottom outer wall of the moving frame 3, and the output end of the first motor 403 is coaxially fixed to one end of the lead screw 401. The second motor 405 is fixedly installed on one side outer wall of the mounting frame 402, and the output end of the second motor 405 is coaxially fixed to one end of the lead screw 404.

[0021] If the diameter of the steel pipe is relatively large, start the first motor 403 to control the rotation of the lead screw 401. The mounting frame 402 slidably sleeved outside the moving frame 3 can only move up and down. The lead screw 401 can drive the mounting frame 402 to move upward along the moving frame 3. And if the pitch of the steel pipe weld is relatively large, start the second motor 405 to control the rotation of the lead screw 404. Similarly, the lead screw 404 can drive the mounting seat 406 to move horizontally along the mounting frame 402. Furthermore, the position of the welding torch 7 installed at the bottom of the mounting seat 406 will also change until the welding wires of the two welding torches 7 can be aligned with the welds on the back and surface of the steel pipe.

[0022] As Figure 3 and Figure 4 shown, a flipping structure is installed at one end of the bottom of the moving frame 3. And the flipping structure includes a support column 407 rotatably connected inside the moving frame 3. A first bevel gear 408 is coaxially fixed to the outside of the support column 407. A stepping motor 409 is fixedly installed on one end outer wall of the moving frame 3. The output end of the stepping motor 409 is coaxially fixed with a second bevel gear 410. The second bevel gear 410 meshes with the first bevel gear 408.

[0023] This device can also adapt to the welding of other workpieces, only requiring the bottom welding torch 7 to participate in the work. If there is a corner position in the weld, the stepping motor 409 outside the moving frame 3 can be started. The stepping motor 409 drives the second bevel gear 410 to rotate. The second bevel gear 410 drives the first bevel gear 408 to rotate through meshing. The first bevel gear 408 drives the support column 407 to rotate synchronously. The angle of the welding torch 7 installed on the outside of the support column 407 will also change.

[0024] As Figure 2 andFigure 3 As shown, a welding torch 7 is installed on the outer wall of the bottom of the mounting seat 406 and on the outer wall of one side of the support column 407. A wire feeding structure and a flux delivery pipe are also provided inside the welding torch 7. A smoking assembly 5 is installed at the bottom of each of the two welding torches 7. The wire feeding mechanism continuously feeds the welding wire into the arc region at a preset wire feeding speed. The welding wire melts under the action of the arc heat to form molten droplets, which transition into the molten pool. The welding power supply automatically adjusts the output current and voltage according to the actual situation during the welding process to maintain the stable combustion of the arc. The flux melts under the action of the arc heat and forms a slag, covering the surface of the molten pool. The slag can isolate the air, prevent the oxidation and nitridation of the molten pool metal, and at the same time can also undergo a metallurgical reaction with the molten metal, remove harmful impurities, and transition beneficial alloying elements into the weld metal. The welding wire is continuously fed into the arc region, the arc continuously burns, melting the welding wire and the base metal of the workpiece, forming a continuous weld.

[0025] The smoking assembly 5 includes a shield 501 fixedly connected to the outer wall of the bottom of the welding torch 7. An air suction ring 502 is fixedly connected to the inner wall of the top of the shield 501. A number of equally spaced air suction holes are provided outside the air suction ring 502. A connecting pipe 503 is fixedly inserted into the shield 501, and one end of the connecting pipe 503 is communicated with the air suction ring 502.

[0026] When the external air suction fan is started, the air inside the air suction ring 502 is drawn away through the connecting pipe 503, and a negative pressure will be generated at the air suction ports outside the air suction ring 502. The fumes generated during the welding process will first be collected by the shield 501 and then drawn in by the air suction ring 502, which can avoid the fumes from affecting the working environment.

[0027] As Figure 1 and Figure 3 shown, a driving assembly 6 is installed between the connecting frame 1 and the moving frame 3. The driving assembly 6 includes a lead screw three 601 rotatably connected inside the connecting frame 1. A moving seat 602 is threadedly connected to the outside of the lead screw three 601. The moving seat 602 is slidably connected inside the connecting frame 1. A motor three 603 is fixedly installed on the outer wall of one side of the connecting frame 1. The output end of the motor three 603 is coaxially fixed to one end of the lead screw three 601. The moving frame 3 is fixedly connected to the outside of the moving seat 602.

[0028] When it is necessary to repair the welding torch 7 or other components, start the motor three 603 to control the rotation of the lead screw three 601. The moving seat 602 slidably connected inside the connecting frame 1 can only move horizontally. The lead screw three 601 can drive the moving seat 602 to move away from the pipeline in the horizontal direction, and the welding torch 7 extending into the pipeline will be exposed to the outside, facilitating the work.

[0029] As Figure 1As shown in FIG. 2, a connecting plate 2 is provided at each of the four corners of the connecting frame 1, and a through hole is formed inside each of the four connecting plates 2. The connecting member passes through the through hole to connect the connecting frame 1 to the output end of the external hydraulic cylinder lifting structure.

[0030] The present invention provides an automatic double-sided submerged arc welding machine for the preparation of spiral submerged arc welded pipes, and the specific working principle is as follows: When the device works, the connecting frame 1 is fixed on the output end of the external hydraulic lifting structure, and the hydraulic cylinder lifting structure is fixed on the inner wall of the top of the external gantry. By controlling the hydraulic cylinder lifting structure, the overall height of the device can be adjusted. The end of the connecting pipe 503 is docked with the air inlet of the external air purification structure including the suction fan and the filtering component. If the diameter of the steel pipe is large, start the first motor 403 to control the rotation of the first lead screw 401. The mounting frame 402 sleeved on the outside of the moving frame 3 can only move up and down, and the first lead screw 401 can drive the mounting frame 402 to move upward along the moving frame 3. If the pitch of the steel pipe weld is large, start the second motor 405 to control the rotation of the second lead screw 404. Similarly, the second lead screw 404 can drive the mounting seat 406 to move horizontally along the mounting frame 402, and then the position of the welding torch 7 installed at the bottom of the mounting seat 406 will also change until the welding wires of the two welding torches 7 can face the welds on the back and surface of the steel pipe. When it is necessary to repair the welding torch 7 or other components, start the third motor 603 to control the rotation of the third lead screw 601. The moving seat 602 slidably connected inside the connecting frame 1 can only move horizontally, and the third lead screw 601 can drive the moving seat 602 to move away from the pipeline horizontally. The welding torch 7 extending into the pipeline will be exposed to the outside, facilitating the work. Start the external suction fan, and the air inside the suction ring 502 is evacuated through the connecting pipe 503, and a negative pressure will be generated at the suction port outside the suction ring 502. The fumes generated during the welding process will first be collected by the baffle 501 and then absorbed by the suction ring 502, which can avoid the fumes from affecting the working environment. This device can also adapt to the welding of other workpieces, only the welding torch 7 at the bottom needs to participate in the work. If there is a corner position in the weld, the stepping motor 409 outside the moving frame 3 can be started. The stepping motor 409 drives the second bevel gear 410 to rotate, and the second bevel gear 410 drives the first bevel gear 408 to rotate through meshing. The first bevel gear 408 drives the support column 407 to rotate synchronously, and the angle of the welding torch 7 installed outside the support column 407 will also change.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Automatic double-sided submerged arc welding machine for preparing spiral submerged arc welded steel pipes, comprising a connecting frame (1) and a moving frame (3), characterized in that: An adjustment component (4) is installed outside the moving frame (3). The adjustment component (4) includes a first lead screw (401) arranged vertically. The first lead screw (401) is rotatably connected inside the moving frame (3). An installation frame (402) is threadedly connected to the outside of the first lead screw (401). The installation frame (402) is slidably sleeved outside the moving frame (3). A second lead screw (404) arranged horizontally is rotatably connected inside the installation frame (402). An installation seat (406) is threadedly connected to the outside of the second lead screw (404). The installation seat (406) is slidably sleeved outside the installation frame (402). Driving structures are installed outside both the moving frame (3) and the installation frame (402). The driving structures include a first motor (403) and a second motor (405).

2. The automatic double-sided submerged arc welding machine for preparing spiral submerged arc welded steel pipes according to claim 1, wherein: The first motor (403) is fixedly installed on the bottom outer wall of the moving frame (3). The output end of the first motor (403) is coaxially fixed to one end of the first lead screw (401). The second motor (405) is fixedly installed on one side outer wall of the installation frame (402). The output end of the second motor (405) is coaxially fixed to one end of the second lead screw (404).

3. The automatic double-sided submerged arc welding machine for preparing spiral submerged arc welded steel pipes according to claim 1, characterized in that: A flipping structure is installed at one end of the bottom of the moving frame (3). The flipping structure includes a support column (407) rotatably connected inside the moving frame (3). A first bevel gear (408) is coaxially fixed to the outside of the support column (407). A stepping motor (409) is fixedly installed on one end outer wall of the moving frame (3). The output end of the stepping motor (409) is coaxially fixed with a second bevel gear (410). The second bevel gear (410) meshes with the first bevel gear (408).

4. The automatic double-sided submerged arc welding machine for preparing spiral submerged arc welded steel pipes according to claim 1, wherein: A welding torch (7) is installed on the bottom outer wall of the installation seat (406) and on one side outer wall of the support column (407). A wire feeding structure and a flux delivery pipe are also arranged inside the welding torch (7). A smoking component (5) is installed at the bottom of both welding torches (7).

5. The automatic double-sided submerged arc welding machine for preparing spiral submerged arc welded steel pipes according to claim 4, characterized in that: The smoking component (5) includes a baffle (501) fixedly connected to the bottom outer wall of the welding torch (7). An air suction ring (502) is fixedly connected to the inner wall of the top of the baffle (501). A number of equally spaced air suction holes are arranged outside the air suction ring (502). A connecting pipe (503) is fixedly inserted into the baffle (501). One end of the connecting pipe (503) is communicated with the air suction ring (502).

6. The automatic double-sided submerged arc welding machine for preparing spiral submerged arc welded steel pipes according to claim 1, wherein: A driving component (6) is installed between the connecting frame (1) and the moving frame (3). The driving component (6) includes a third lead screw (601) rotatably connected inside the connecting frame (1). A moving seat (602) is threadedly connected to the outside of the third lead screw (601). The moving seat (602) is slidably connected inside the connecting frame (1). A third motor (603) is fixedly installed on one side outer wall of the connecting frame (1). The output end of the third motor (603) is coaxially fixed to one end of the third lead screw (601). The moving frame (3) is fixedly connected to the outside of the moving seat (602).

7. The automatic double-sided submerged arc welding machine for preparing spiral submerged arc welded steel pipes according to claim 1, wherein: A connecting plate (2) is provided at each of the four corners of the connecting frame (1). A through hole is opened inside each of the four connecting plates (2).

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