Large-diameter round pipe column assembling and welding jig
By designing a large-diameter circular pipe column assembly and welding jig and using a power motor to drive the circular pipe column to rotate, the safety hazards and low efficiency of welding the top of long circular pipe columns were solved, and a highly efficient and safe welding process was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI HONGLU STEEL STRUCTURE
- Filing Date
- 2025-06-23
- Publication Date
- 2026-06-23
AI Technical Summary
In the production of large steel structure components, welding the top of long cylindrical columns poses construction safety hazards and is inefficient, requiring workers to frequently climb up and down, which is time-consuming and labor-intensive.
Design a large-diameter circular pipe column assembly and welding jig, including a base plate, a power roller support mechanism, a ladder platform and a welding window. The circular pipe column is driven to rotate by a power motor, and the welding operator completes the welding on the top platform.
It improves the safety and efficiency of welding operations, reduces the frequency of personnel climbing up and down, and achieves an efficient and convenient welding process.
Smart Images

Figure CN224390388U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of steel structure processing equipment, and in particular to a large-diameter circular pipe column assembly and welding jig. Background Technology
[0002] In large steel structure production workshops, there is a type of circular tube column component used in large steel structure buildings. The most basic part of this large-sized circular tube column steel component is the circular tube column. For longer circular tube columns, they are usually formed by butt welding two shorter circular tube columns together. Generally, the two circular tube columns are first spot welded to shape them, and then fully welded to form the product. However, when welding the butt joint of this large-sized circular tube column component, the entire circle needs to be welded. For the welding of the two sides, the workers can stand on the ground to perform the welding. However, for the weld at the top, the workers need to climb up to perform the welding. The workers have to work up and down, which is not only time-consuming and labor-intensive with low efficiency, but also poses construction safety hazards due to the need to climb up to work. Utility Model Content
[0003] The purpose of this utility model is to address the above-mentioned situation by providing a large-diameter circular pipe column assembly and welding jig. The application of this jig can improve the safety of manual operations, increase production efficiency, and save time and effort in quick operation.
[0004] The specific solution of this utility model is as follows: a large-diameter circular pipe column assembly and welding jig has a base plate, on which a power roller support mechanism is provided for supporting the circular pipe column workpiece; it also has a ladder platform, which spans the front and rear sides of the base plate, the ladder platform includes a top platform, and a ladder is provided at each of the two symmetrical positions on both sides of the top platform. The bottom of each ladder is equipped with a rolling wheel with a self-locking buckle, and a welding window is also opened on the top platform.
[0005] Furthermore, the power roller support mechanism described in this utility model includes four rectangularly distributed support rollers. Each support roller has a support wheel seat at its bottom, and the support wheel seat is placed on the base plate. During operation, the cylindrical workpiece rests on the four support rollers and rotates accordingly. One of the four support rollers is also equipped with a drive mechanism, which is used to drive the corresponding support roller to rotate.
[0006] Furthermore, the drive mechanism described in this utility model includes a sprocket and chain assembly and a power motor. The power motor is mounted on the base plate, and the sprocket and chain assembly drives the power motor and the axle of the corresponding supporting roller.
[0007] Furthermore, the welding window described in this utility model is a rectangular window, which is arranged longitudinally from front to back.
[0008] Furthermore, the ladder described in this utility model is made of angle steel assembled and welded together, and the entire ladder is set up on a slope.
[0009] Furthermore, the top platform described in this utility model is provided with edge guards 15-20cm high on both the left and right sides.
[0010] This utility model has the following beneficial effects:
[0011] 1. By setting up a top platform, the welding workers can work on the platform without having to climb up and down repeatedly, thus ensuring their safety.
[0012] 2. This utility model places the butt-welded cylindrical workpiece on a power roller support mechanism. Driven by a power motor, the cylindrical workpiece can rotate at a certain speed. Combined with the welding operation on the top platform, the operator only needs to perform welding on the top platform at the corresponding speed. The entire welding can be completed by rotating the cylindrical workpiece once under the drive of the power motor, which is very convenient, fast and efficient.
[0013] 3. The ladder platform in this utility model can move to different positions to perform operations according to the different welding points of the actual circular pipe column, and then be locked with the self-locking buckle on the rolling wheel to stabilize it, which is very convenient. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure from the main view direction of this utility model;
[0015] Figure 2 This is a top view structural diagram of this utility model;
[0016] Figure 3 This is a side view structural diagram of the present invention;
[0017] Figure 4 This is a schematic diagram of the utility model in use from the main view.
[0018] Figure 5 yes Figure 4 A schematic diagram of the structure from a side view.
[0019] In the diagram: 1—Support wheel seat, 2—Support roller, 3—Sprocket and chain assembly, 4—Power motor, 5—Base plate, 6—Side guard plate, 7—Top platform, 8—Ladder, 9—Rolling wheel, 10—Welding window, 11—First section of round pipe column, 12—Weld, 13—Second section of round pipe column. Detailed Implementation
[0020] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the protection scope of this utility model. In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0022] See Figures 1-3 This utility model is a large-diameter circular pipe column assembly and welding jig, which has a base plate 5. The base plate is provided with a power roller support mechanism for supporting the circular pipe column workpiece. It also has a ladder platform, which spans the front and rear sides of the base plate. The ladder platform includes a top platform 7, and a ladder 8 is provided on each side of the top platform at a symmetrical position. Furthermore, the ladders in this utility model are made of angle steel assembled and welded. The entire ladder is set on a slope. Each ladder is equipped with a self-locking rolling wheel 9 at the bottom. A welding window 10 is also opened on the top platform. Furthermore, the welding window in this utility model is a rectangular window, which is arranged longitudinally front and back.
[0023] Furthermore, the power roller support mechanism described in this utility model includes four rectangularly distributed support rollers 2, each support roller having a support wheel seat 1 at its bottom, the support wheel seat being placed on the base plate. During operation, the cylindrical workpiece rests on the four support rollers and rotates accordingly. One of the four support rollers is also equipped with a drive mechanism, which is used to drive the corresponding support roller to rotate.
[0024] Furthermore, the drive mechanism described in this utility model includes a sprocket and chain assembly 3 and a power motor 4. The power motor is mounted on the base plate, and the sprocket and chain assembly drives the power motor and the axle of the corresponding supporting roller.
[0025] Furthermore, the top platform described in this utility model is provided with edge guards 6 with a height of 15-20cm on both the left and right sides.
[0026] This utility model is a practical tool. When using it, the circular tube column workpiece, which is assembled from the first section of the circular tube column 11 and the second section of the circular tube column 13, is first placed on a flat ground and partially spot-welded to shape it. Then, a gantry crane is used to lift the entire workpiece onto four supporting rollers. Next, the ladder platform of this utility model is moved across the weld seam of the workpiece so that the welding window is facing the weld seam. Then, the self-locking buckle at the bottom of the ladder locks the rollers to stabilize it. Then, the power motor is started, and the entire workpiece is rotated through the supporting rollers. The weld seam on it also rotates. The welder can then perform welding operations at the welding window on the top platform. As the weld seam rotates once, the entire welding work is completed, eliminating the need for the welder to go up and down repeatedly.
[0027] The speed of the power motor in this invention can be adjusted as needed. The sprocket and chain assembly serves as a transmission mechanism, connecting the power motor and the axle supporting the rollers. It drives the cylindrical workpiece to rotate without requiring manual pushing of the workpiece. A gear mechanism can also be used to drive the rotation. Of course, multiple such drive mechanisms can be set without any problem.
[0028] This invention, by setting up a top platform, allows welding workers to operate solely from the platform, eliminating the need for repeated climbing up and down, thus ensuring operational safety. The invention places the cylindrical workpiece to be welded on a powered roller support mechanism. Driven by a motor, the cylindrical workpiece rotates at a certain speed. Combined with the welding operation on the top platform, the worker only needs to weld at the appropriate speed on the platform. The entire welding process is completed with one rotation of the cylindrical workpiece driven by the motor, making it extremely convenient, fast, and efficient.
[0029] The ladder platform in this invention can move to different positions to perform work, depending on the welding points of the actual circular pipe column. It can then be locked in place by the self-locking buckle on the rolling wheel, which is very convenient.
Claims
1. A large-diameter circular pipe column assembly and welding jig, having a base plate, characterized in that: The base plate is provided with a power roller support mechanism for supporting the cylindrical workpiece; it is also provided with a ladder platform, which spans the front and rear sides of the base plate. The ladder platform includes a top platform, and a ladder is provided on each side of the top platform at a symmetrical position. The bottom of each ladder is equipped with a rolling wheel with a self-locking buckle. A welding window is also provided on the top platform.
2. The large-diameter circular pipe column assembly and welding jig according to claim 1, characterized in that: The power roller support mechanism includes four rectangular support rollers, each with a support wheel seat at its bottom. The support wheel seat is mounted on the base plate. During operation, the cylindrical workpiece rests on the four support rollers and rotates accordingly. One of the four support rollers is also equipped with a drive mechanism, which drives the corresponding support roller to rotate.
3. The large-diameter circular pipe column assembly and welding jig according to claim 2, characterized in that: The drive mechanism includes a sprocket and chain assembly and a power motor. The power motor is mounted on the base plate, and the sprocket and chain assembly drives the power motor and the axle of the corresponding supporting roller.
4. The large-diameter circular pipe column assembly and welding jig according to claim 1, characterized in that: The welding window is a rectangular window, which is arranged longitudinally from front to back.
5. The large-diameter circular pipe column assembly and welding jig according to claim 1, characterized in that: The ladder is made of angle steel assembled and welded together, and the entire ladder is set up on a slope.
6. The large-diameter circular pipe column assembly and welding jig according to claim 1, characterized in that: The top platform is equipped with edge guards 15-20cm high on both the left and right sides.