Welding device for inner side welding seam welding

Abstract

The utility model provides a welding device for welding an inner side welding seam, the welding device for welding the inner side welding seam comprises a welding device body and a fixing device, the fixing device is movably installed in the welding device body, and when a steel pipe needs to be fixed, the fixing device is fixed on the welding device body. The two moving plates are driven by the driving assembly to move relatively close to each other, when the clamping assemblies on the two moving plates are released from the steel pipe, the two moving plates are continuously driven by the driving assembly to move until the steel pipe is clamped and fixed by the two clamping assemblies, and at the moment, the steel pipe is fixed during welding; and a stabilizing wheel assembly is arranged on a jacking assembly, so that rotation of the steel pipe is not affected after the device clamps and fixes the steel pipe, and the device is more practical in use.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, and in particular to a welding device for welding internal weld seams. Background Technology

[0002] An internal weld seam welding device is available for welding seams. It includes a mounting frame, a welded pipe body, and a seam-following and stabilizing guiding mechanism. The seam-following mechanism uses a non-elastic fabric tape winding instead of a long screw cantilever to drive related components. In conjunction with the guide plate, it enables the welding gun to accurately weld along the inner seam of the pipe, reducing operation and maintenance difficulty and improving space utilization.

[0003] In the prior art, Chinese patent publication number CN219881604U discloses a welding device for welding internal weld seams. This device includes a welding machine body, a docking platform on the right side of the welding machine body, multiple support grooves on the inner wall of the docking platform, rotating columns rotatably connected to one side of two corresponding support grooves, and multiple wheels fixedly connected to the columns of both rotating columns. A first motor is fixedly connected to the left side of the front left support groove. In use, this prior art adjusts the distance and height between the support grooves by observing the diameter of the steel pipe to ensure normal rotation of the steel pipe, thus enabling normal welding. First, a second motor and a third motor are started simultaneously. The second motor rotates a second bevel gear via a connecting rod, which in turn drives a threaded rod to rotate via a first bevel gear. The rotation of the threaded rod moves the support groove, preventing the bottom surface of the steel pipe from contacting the adjusting plate and hindering its rotation if the pipe diameter is too wide. The third motor moves the adjusting plate via a bidirectional screw, thereby adjusting the distance between the support grooves and adjusting the distance between the two sets of wheels. After adjusting to the appropriate position, turn off the second and third motors, and place the steel pipe on the wheels on the docking platform. Further fine adjustments can be made following the same procedure. Once adjusted, start welding the inside of the steel pipe within the welding machine body. The first motor rotates the rotating column, causing the front set of wheels to rotate. The front wheels drive the steel pipe to rotate on its own, while the rear wheels ensure the stability of the steel pipe during rotation.

[0004] Although the device can accommodate steel pipes of various sizes and perform internal welding, its operation involves placing the steel pipe between two sets of wheels. While the distance between the wheels is adjustable, the wheels need to rotate the steel pipe during welding. Since there is no mechanism on the device to limit the pipe's movement, it relies on its own weight and friction to stay on the wheels. If the device vibrates during welding, the steel pipe may detach, potentially causing the welded section to crack. This necessitates reloading the pipe, reducing its efficiency and, in severe cases, risking injury or even a fatal accident.

[0005] Therefore, it is necessary to provide a new welding device for welding internal weld seams to solve the above-mentioned technical problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a welding device for welding inner weld seams.

[0007] The welding device for welding internal weld seams provided by this utility model includes: a welding device body and a fixing device, wherein the fixing device is movably installed inside the welding device body;

[0008] The fixing device includes: a drive assembly, two moving plates, two mounting plates, and two clamping assemblies. One side of the drive assembly is fixedly connected to the inner side of the welding device body. The two moving plates are threadedly connected to the output end of the drive assembly. One side of each of the two mounting plates is fixedly connected to the opposite side of the two moving plates. Multiple mounting slots are provided on each of the two mounting plates. A spring is provided at the bottom of the middle mounting slot. The side of each spring away from the multiple mounting slots is fixedly connected to one side of each of the two clamping assemblies. The side of each clamping assembly near the spring extends into the multiple mounting slots of the two mounting plates.

[0009] Preferably, the drive assembly includes: a drive motor, a fixed plate, a double-ended threaded rod, and two guide rods. One side of the fixed plate is fixedly connected to one side of the welding device body. One side of the drive motor is fixedly connected to one side of the fixed plate. The output end of the drive motor is fixedly connected to the double-ended threaded rod. The side of the double-ended threaded rod away from the drive motor is threadedly connected to one side of the two moving plates. The double-ended threaded rod is rotatably connected to the welding device body. The two guide rods pass through the two moving plates respectively and are slidably connected to the two moving plates. The two guide rods are located on both sides of the double-ended threaded rod.

[0010] Preferably, the clamping assembly includes: a main rod, a stabilizing wheel assembly, and two auxiliary rods. The main rod and the two auxiliary rods extend into multiple mounting slots. One side of the main rod is fixedly connected to one side of the spring. The main rod is fixedly connected to one side of the stabilizing wheel assembly. The two auxiliary rods are rotatably connected to the side of the stabilizing wheel assembly near the main rod.

[0011] Preferably, the two auxiliary rods are located on both sides of the main rod.

[0012] Preferably, the stabilizing wheel assembly includes: a main plate and two sub-plates, one side of each of the two sub-plates being rotatably connected to both sides of the main plate, one side of the main rod being fixedly connected to one side of the main plate, one side of each of the two sub-plates being rotatably connected to the side of the two sub-plates closest to the main rod, and a sliding wheel being fixedly provided on the side of the main plate and the side of the two sub-plates furthest from the main rod.

[0013] Preferably, the cross-sections of the multiple mounting slots are all cross-shaped, and the cross-sections of the main rod and the auxiliary rod are also cross-shaped.

[0014] Preferably, the outer surfaces of the plurality of sliding wheels are all smoothly disposed.

[0015] Compared with related technologies, the welding device for welding inner weld seams provided by this utility model has the following beneficial effects:

[0016] 1. In practical use, when it is necessary to fix the steel pipe, the drive component drives the two moving plates to move closer to each other. When the clamping components on the two moving plates are released from the steel pipe, the drive component continues to drive them to continue moving until the two clamping components clamp and fix the steel pipe. At this time, the steel pipe is fixed during welding, making the welding process more stable and safe. In addition, the stabilizing wheel component on the clamping component ensures that the device does not affect the rotation of the steel pipe after clamping and fixing, making the device more practical.

[0017] 2. In actual use, through the action of multiple springs, main rod and auxiliary rod, when the sliding wheel on the main board on one side of the main rod contacts the steel pipe, the device continues to move. At this time, the main rod moves closer to the inside of the mounting groove, and the spring is in a compressed state. This allows the device to be used for steel pipes of different diameters, making the device more versatile. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of the welding device for welding inner weld seams provided by this utility model;

[0019] Figure 2 Another structural diagram of the welding device for welding inner weld seams provided by this utility model;

[0020] Figure 3 A partial structural schematic diagram of the welding device for welding inner weld seams provided by this utility model;

[0021] Figure 4 A schematic diagram of the fixing device structure provided by this utility model;

[0022] Figure 5 An internal sectional view of the fixing device provided by this utility model.

[0023] The following are the labels in the diagram: 1. Welding device body; 2. Motion plate; 3. Mounting plate; 4. Mounting groove; 5. Spring; 6. Drive motor; 7. Mounting plate; 8. Double-ended threaded rod; 9. Guide rod; 10. Main rod; 11. Secondary rod; 12. Main plate; 13. Secondary plate; 14. Sliding wheel. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Please refer to the following: Figure 1 — Figure 5 ,in, Figure 1 A schematic diagram of the overall structure of the welding device for welding inner weld seams provided by this utility model; Figure 2 Another structural diagram of the welding device for welding inner weld seams provided by this utility model; Figure 3 A partial structural schematic diagram of the welding device for welding inner weld seams provided by this utility model; Figure 4 A schematic diagram of the fixing device structure provided by this utility model; Figure 5 An internal sectional view of the fixing device provided by this utility model.

[0026] In practical implementation, a welding device for welding inner weld seams has the following structure: Figure 1 — Figure 5 As shown, it includes: a welding device body 1 and a fixing device, wherein the fixing device is movably installed inside the welding device body 1;

[0027] It should be noted that the welding device body 1 mentioned above is specifically a device within a welding device for internal weld seam welding, as disclosed in a Chinese patent with publication number CN219881604U. When using this device, the operating table for placing the steel pipe has an adjustment function, making the device suitable for steel pipes of different diameters. When steel pipes of different diameters are being welded on the inner ring, slippage may occur, allowing the device to rotate steel pipes of different diameters on its own, thereby ensuring the normal operation of the device. There is no need to purchase welding devices of different specifications, thus enhancing the applicability of the device.

[0028] The fixing device includes: a drive assembly, two moving plates 2, two mounting plates 3, and two clamping assemblies. One side of the drive assembly is fixedly connected to the inside side of the welding device body 1. The two moving plates 2 are threadedly connected to the output end of the drive assembly. One side of each of the two mounting plates 3 is fixedly connected to the opposite side of the two moving plates 2. Each of the two mounting plates 3 has multiple mounting slots 4. The bottom of the mounting slot 4 located in the middle of the multiple mounting slots 4 is provided with a spring 5. The side of each spring 5 away from the multiple mounting slots 4 is fixedly connected to one side of each of the two clamping assemblies. The side of each of the two clamping assemblies near the spring 5 extends into the multiple mounting slots 4 of the two mounting plates 3. The clamping assemblies include: a main rod 10, a stabilizing wheel assembly, and two auxiliary rods 11. The main rod 10 and the two auxiliary rods 11 extend into the multiple mounting slots. Inside 4, one side of the main rod 10 is fixedly connected to one side of multiple springs 5, and the main rod 10 is fixedly connected to one side of the stabilizing wheel assembly. Two auxiliary rods 11 are rotatably connected to the side of the stabilizing wheel assembly near the main rod 10. The two auxiliary rods 11 are located on both sides of the main rod 10. The stabilizing wheel assembly includes: a main plate 12 and two auxiliary plates 13. One side of the two auxiliary plates 13 is rotatably connected to both sides of the main plate 12. One side of the main rod 10 is fixedly connected to one side of the main plate 12. One side of the two auxiliary rods 11 is rotatably connected to the side of the two auxiliary plates 13 near the main rod 10. Sliding wheels 14 are fixedly provided on the side of the main plate 12 and the side of the two auxiliary plates 13 away from the main rod 10. The cross-sections of multiple mounting slots 4 are all cross-shaped. The cross-sections of the main rod 10 and the auxiliary rods 11 are all cross-shaped. The outer surfaces of multiple sliding wheels 14 are all smooth.

[0029] It should be noted that when the above device is in use, if the drive rotates the double-headed threaded rod 8, the two moving plates 2 will move closer to each other. The two moving plates 2 drive the mounting plate 3 to move synchronously. During the movement of the mounting plate 3, since the outside of the steel pipe is arc-shaped and the main plate 12 is located between the two auxiliary plates 13, the sliding wheel 14 on the main plate 12 will first contact the steel pipe. At this time, the device continues to move, and the main plate 12 will squeeze the main rod 10, causing the main rod 10 to move towards the bottom of the mounting groove 4. At this time, the spring 5 is in a compressed state. At this time, the device continues to move, and the two auxiliary rods 11 will continue to push the two auxiliary plates 13 to move. Since the auxiliary plates 13 are rotatably connected to the main plate 12, the two auxiliary rods 11 push the two auxiliary plates 13 to rotate around the connection point with the main plate 12 until the sliding wheel 14 on the two auxiliary plates 13 also contacts the surface of the steel pipe. At this time, the device stops moving. Figure 2As shown, the device achieves multi-point contact clamping of the outer surface of the steel pipe, and the sliding wheels 14 set at the contact clamping positions do not obstruct the rotation of the steel pipe itself. This allows the device to clamp the steel pipe at multiple points during actual use, making steel pipe welding safer and improving the working efficiency of the device. Furthermore, the two auxiliary plates 13 are rotatably connected to the main plate 12. When facing steel pipes of different diameters, the angle formed by the auxiliary plates 13 and the main plate 12 is different. Therefore, the sliding wheels 14 on the auxiliary plates 13 and the main plate 12 can always form multi-point contact with different outer surfaces of the steel pipes, enabling the device to be used for various types of steel pipes and improving the applicability of the device.

[0030] The drive assembly includes a drive motor 6, a fixed plate 7, a double-threaded rod 8, and two guide rods 9. One side of the fixed plate 7 is fixedly connected to one side of the welding device body 1. One side of the drive motor 6 is fixedly connected to one side of the fixed plate 7. The output end of the drive motor 6 is fixedly connected to the double-threaded rod 8. The side of the double-threaded rod 8 away from the drive motor 6 is threadedly connected to one side of the two moving plates 2. The double-threaded rod 8 is rotatably connected to the welding device body 1. The two guide rods 9 pass through the two moving plates 2 respectively and are slidably connected to the two moving plates 2. The two guide rods 9 are located on both sides of the double-threaded rod 8.

[0031] It should be noted that in the above device, the two guide rods 9 are located on both sides of the double-ended threaded rod 8. In use, when the drive motor 6 drives the double-ended threaded rod 8 to rotate, the two guide rods 9 can restrict the rotation of the two moving plates 2, so that the two moving plates 2 can move relatively closer or relatively farther away along the double-ended threaded rod 8. In addition, the guide rods 9 also play a stabilizing role, making the movement of the device more stable.

[0032] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A welding apparatus for welding inner weld seams, characterized in that, include: The welding device body (1) and the fixing device are movably installed inside the welding device body (1); The fixing device includes: a drive assembly, two moving plates (2), two mounting plates (3), and two clamping assemblies. One side of the drive assembly is fixedly connected to the inside side of the welding device body (1). The two moving plates (2) are threadedly connected to the output end of the drive assembly. One side of the two mounting plates (3) is fixedly connected to the opposite side of the two moving plates (2). Multiple mounting slots (4) are provided on both mounting plates (3). A spring (5) is provided at the bottom of the mounting slot (4) located in the middle part of the multiple mounting slots (4). The side of the multiple springs (5) away from the multiple mounting slots (4) is fixedly connected to one side of the two clamping assemblies. The side of the two clamping assemblies close to the springs (5) extends into the multiple mounting slots (4) of the two mounting plates (3).

2. The welding apparatus for welding inner welds according to claim 1, characterized in that, The drive assembly includes a drive motor (6), a fixed plate (7), a double-ended threaded rod (8), and two guide rods (9). One side of the fixed plate (7) is fixedly connected to one side of the welding device body (1). One side of the drive motor (6) is fixedly connected to one side of the fixed plate (7). The output end of the drive motor (6) is fixedly connected to the double-ended threaded rod (8). The side of the double-ended threaded rod (8) away from the drive motor (6) is threadedly connected to one side of the two moving plates (2). The double-ended threaded rod (8) is rotatably connected to the welding device body (1). The two guide rods (9) pass through the two moving plates (2) respectively. The two guide rods (9) are slidably connected to the two moving plates (2). The two guide rods (9) are located on both sides of the double-ended threaded rod (8).

3. The welding apparatus for welding inner welds according to claim 2, characterized in that, The clamping assembly includes a main rod (10), a stabilizing wheel assembly, and two auxiliary rods (11). The main rod (10) and the two auxiliary rods (11) extend into multiple mounting slots (4). One side of the main rod (10) is fixedly connected to one side of the spring (5). The main rod (10) is fixedly connected to one side of the stabilizing wheel assembly. The two auxiliary rods (11) are rotatably connected to the side of the stabilizing wheel assembly near the main rod (10).

4. The welding apparatus for welding inner welds according to claim 3, characterized in that, The two auxiliary rods (11) are located on both sides of the main rod (10).

5. The welding apparatus for welding inner welds according to claim 4, characterized in that, The stabilizing wheel assembly includes: a main plate (12) and two auxiliary plates (13). One side of each of the two auxiliary plates (13) is rotatably connected to both sides of the main plate (12). One side of the main rod (10) is fixedly connected to one side of the main plate (12). One side of each of the two auxiliary rods (11) is rotatably connected to the side of each of the two auxiliary plates (13) near the main rod (10). Sliding wheels (14) are fixedly provided on the side of the main plate (12) and the two auxiliary plates (13) away from the main rod (10).

6. The welding apparatus for welding inner welds according to claim 5, characterized in that, The cross-sections of the multiple mounting slots (4) are all cross-shaped, and the cross-sections of the main rod (10) and the auxiliary rod (11) are all cross-shaped.

7. The welding apparatus for welding inner welds according to claim 6, characterized in that, The outer surfaces of all of the sliding wheels (14) are smooth.

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