Adjustable teaching aid for welding obstacles for pipe butt welding training
By designing adjustable welding obstacle training tools to simulate different welding difficulties, the problem of difficulty in training welders to operate in obstacle environments in existing technologies has been solved, thereby improving welding quality and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUNNAN VOCATIONAL COLLEGE OF MECHANICAL & ELECTRICAL TECH
- Filing Date
- 2025-10-15
- Publication Date
- 2026-07-21
AI Technical Summary
Existing technologies are unable to effectively simulate pipeline welding scenarios with obstacles, resulting in a decline in welding quality. Furthermore, there is a lack of targeted training methods to improve the operational stability and skill level of welders in obstacle environments.
Design an adjustable welding obstacle training tool, including a cross-shaped base plate, upper and lower circular tubes, and an adjustable obstacle tube. By adjusting the distance between the obstacle tube and the tubular workpiece, different welding difficulties can be simulated, enhancing the operation training of welders in obstacle environments.
It improves the operational stability and skill level of welders in obstacle environments, ensures welding quality, and enhances the training effect of welders in special positions.
Smart Images
Figure CN224536604U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of teaching tools for metal pipe welding, specifically to a teaching tool used to deliberately create obstacles to increase the difficulty of welding when teaching the butt welding of metal pipes. Background Technology
[0002] Piping systems are widely used in industrial production and construction. However, in actual installation, situations often arise where welding pipelines with obstacles are encountered. Traditional pipeline welding exercises are mostly designed for pipelines without obstacles. For pipeline welding with obstacles, conventional methods are difficult to implement. For example, when there are complex structural components, other pipelines, or confined spaces around the pipeline, the welding quality is easily affected by these obstacles. To improve welders' adaptability when encountering obstacles during pipeline welding, systematic guidance and targeted training are needed to ensure welding quality. In summary, it is necessary to design training scenarios simulating pipeline welding with obstacles, using physical models for effective practice, strengthening the observation and analysis of the welding environment during training, and showcasing successful and unsuccessful pipeline welding cases with obstacles to help welders understand the key points. At the same time, training should be strengthened on welding postures in special positions to improve operational stability and ensure welding quality. Summary of the Invention
[0003] The purpose of this invention is to provide an adjustable welding obstacle training tool for pipe butt welding training that can simulate the training scenario of pipe welding with obstacles in daily practice, which can easily enhance the training of welders in welding posture in special positions, improve their operational stability, and ensure welding quality.
[0004] The objective of this utility model is achieved through the following technical solution.
[0005] An adjustable welding obstacle training tool for pipe butt welding includes a cross-shaped base plate, an upper circular pipe vertically welded to the center of the top surface of the base plate, and a lower circular pipe vertically welded to the center of the bottom surface of the base plate. A through hole is formed in the center of the base plate. Four branch plates distributed in a cross shape on the base plate each have through grooves along their length. An obstacle pipe with a base plate is mounted on each branch plate. A central hole is formed in the base plate of the obstacle pipe, and connecting bolts pass through the central hole and the through grooves on the branch plates to mount the obstacle pipe onto the branch plates. A pair of opposing screw holes are formed radially on the side wall of the upper circular pipe, and a clamping bolt is mounted in each screw hole. A pressure relief hole is formed on the side wall of the lower circular pipe.
[0006] Furthermore, the screw hole on the upper circular tube is located in the middle position between the two branch plates on the same side.
[0007] This invention allows for the placement of a tubular workpiece, after spot welding, within the upper circular tube of a cross-shaped base plate. The clamping bolts, fitted into the screw holes on the side walls of the upper circular tube, are then tightened from both sides to secure the workpiece. The obstacle tube is then adjusted along a slot on a branch plate according to training needs, thereby regulating the distance between the workpiece and the obstacle tube. This creates an obstruction to the workpiece, allowing the trainee to practice welding with a welding torch. The smaller the distance between the obstacle tube and the workpiece, the greater the obstruction, the smaller the welding space, and the greater the welding difficulty. Conversely, a larger distance results in easier welding.
[0008] This utility model has a simple structure and is easy to operate. When performing welding of obstructed pipes in welding teaching and training, welding skills competitions, the distance between the obstructing pipe and the tubular workpiece to be welded can be adjusted at will. This improves the ability of welders to solve difficulties when encountering obstacles in daily pipe welding production, enhances the technical level of welders, and improves their welding skills. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is the front view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 This is a schematic diagram of the obstruction tube; Figure 5 This is a schematic diagram of the present invention used in welding training; Figure 6 This is a schematic diagram showing how to adjust the obstruction tube to be closer to the tubular workpiece. Detailed Implementation
[0010] like Figure 1 , Figure 2 , Figure 3As shown, an adjustable welding obstacle training aid for pipe butt welding includes a cross-shaped base plate 1 made of steel plate, a vertical upper circular pipe 2, and a lower circular pipe 3. The bottom end of the upper circular pipe is welded to the center of the top surface of the base plate, and the top end of the lower circular pipe 3 is welded to the center of the bottom surface of the base plate. The area of the central cross intersection region of the base plate 1 is larger than the cross-sectional area of the upper circular pipe 2 and the lower circular pipe 3, allowing the upper circular pipe 2 and the lower circular pipe 3 to be stably welded to the base plate. A through hole 1a is provided in the center of the base plate 1 to relieve pressure and prevent gas expansion caused by internal heating of the tubular workpiece during welding, which could lead to poor weld formation or welding defects inside the pipe being welded. Through grooves 1b are provided along the length of the surface of each of the four branch plates 1c distributed in a cross shape on the base plate. Each branch plate is equipped with... Figure 4 The obstruction pipe 4 with a base plate shown has a central hole 4a on the base plate. A connecting bolt 5 passes through the central hole 4a and a through groove 1b on the branch plate, allowing the obstruction pipe to be mounted on the branch plate. Loosening the connecting bolt 5 allows the obstruction pipe to move along the through groove 1b. After the obstruction pipe moves to the set position, tightening the connecting bolt fixes the obstruction pipe on the branch plate. A pair of opposing screw holes 2a are radially formed on the side wall of the upper circular pipe 2. Each screw hole is fitted with a locking bolt 6 that can be screwed into the pipe (for illustrative purposes, the screw holes 2a are not shown). Figure 1 The tightening bolt 6 is not shown in the figure. A pressure relief hole 3a is provided on the side wall of the lower circular tube 3. This is also to prevent the gas from expanding due to internal heating during the welding process of the tubular workpiece, which cannot be released and causes poor weld formation or welding defects inside the welded pipe.
[0011] In this embodiment, each branch plate has a length (from the center of the base plate to the outer end) of 360mm, and the through groove 1b has a length of 200mm and a width of 12mm. The outer edge of the branch plate is made into an arc shape to avoid sharp corners causing injury to operators. The included angle between adjacent branch plates is 90°. The upper circular tube 2 has an outer diameter of 132mm, a wall thickness of 6mm, and a height of 80mm. The screw hole 2a on the upper circular tube is located in the middle between two branch plates on the same side, that is, the radial angle α between the screw hole 2a and the two branch plates on the same side is 45°, so that the branch plates do not affect the operation when fixing and welding the workpiece. The lower circular tube 3 has an outer diameter of 100mm, a wall thickness of 6mm, and a height of 250mm, and the pressure relief hole 3a of the lower circular tube is 50mm away from the base plate. The obstruction tube 4 has an outer diameter of 50mm, a wall thickness of 6mm, and a height of 300mm. The upper circular tube, lower circular tube, and obstruction tube are all steel pipes.
[0012] When using this invention for welding obstacle training, such as Figure 5As shown, the lower circular tube 3 of this utility model is inserted into the positioning tube 9, which is securely welded to the base 10, or clamped in a fixture. The two tubular workpieces to be welded together, namely the lower section 7a and the upper section 7b, are first spot-welded together. Then, the lower part of the lower section is placed in the upper circular tube 2, ensuring that the height of the lower section is higher than that of the upper circular tube. The two clamping bolts 6 are rotated inwards until their tips press against the lower section from both sides, stabilizing the tubular workpiece. Then, the obstruction tube is adjusted. First, the connecting bolt 5 is loosened, and the obstruction tube is moved along the through groove 1b to the set obstruction position. Then, the connecting bolt is tightened to secure the obstruction tube to the branch plate. The height of the obstruction tube should be higher than the height of the lower section, and the weld 8 connecting the lower section 7a and the upper section 7b should be significantly lower than the top of the obstruction tube. Figure 6 As shown, by adjusting the position of the obstacle pipe, the distance L between the tubular workpiece to be welded and the obstacle pipe is adjusted, i.e., the obstruction position of the obstacle pipe on the tubular workpiece. The closer the distance, the larger the obstructed area of the welding torch and welding rod, and the greater the difficulty of welding the tubular workpiece. Especially in places with confined welding operation space, when the welding operator cannot enter the confined space and has difficulty moving their body position, and can only hold the welding torch to touch the A side of the pipe facing the obstacle pipe, the obstacle pipe will cause obstruction, affecting the welding operator's work and increasing the difficulty of the operation. After the position of the obstacle pipe is fixed, welding training can be carried out on the joint 8 between the lower pipe section 7a and the upper pipe section 7b. The four obstacle pipes can be adjusted to be at the same distance from the center of the base plate, or at different distances, setting different obstruction and operation difficulty. By increasing the difficulty of welding operations, the welding operator's ability to solve difficulties when encountering obstacles in daily pipe welding is improved, and the welding operator's operation skills and abilities are improved. It can also be used to train the welding operator's welding posture in special positions, improve their operational stability, and ensure welding quality.
Claims
1. An adjustable welding obstacle training aid for pipe butt welding, characterized in that, It includes a cross-shaped base plate (1), an upper circular tube (2) vertically welded to the center of the top surface of the base plate, and a lower circular tube (3) vertically welded to the center of the bottom surface of the base plate; a base plate through hole (1a) is opened in the center of the base plate (1), and through grooves (1b) are opened along the length of the surface of the four branch plates (1c) distributed in a cross shape on the base plate. Each branch plate is equipped with a barrier tube (4) with a bottom plate. A central hole (4a) is opened on the bottom plate of the barrier tube, and a connecting bolt (5) is provided to pass through the central hole of the bottom plate and the through groove on the branch plate to install the barrier tube on the branch plate; a pair of opposing screw holes (2a) are opened radially on the side wall of the upper circular tube (2), and a tightening bolt (6) is installed on each screw hole; a lower circular tube pressure relief hole (3a) is opened on the side wall of the lower circular tube (3).
2. The adjustable welding obstacle training aid for pipe butt welding as described in claim 1, characterized in that, The screw hole (2a) on the upper round tube (2) is located in the middle between the two branch plates on the same side.