An operating method of a high-precision butt joint device for large-diameter pipeline welding
By using a fixed core and a dual heating plate driven by a servo motor in a hot melt butt welding machine, the problem of low butt welding accuracy in large-diameter pipe welding has been solved, achieving efficient and safe pipe butt welding.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HENAN GUANDGA PIPE CO LTD
- Filing Date
- 2024-03-14
- Publication Date
- 2026-06-26
AI Technical Summary
Existing hot melt butt welding machines have low pipe butt welding accuracy during the welding of large-diameter pipes, making it difficult to achieve success in one go, and are prone to misalignment. Moreover, the operation is time-consuming and labor-intensive.
A fixed core is inserted into the inside of the pipe to ensure that the centers of the two pipe sections are on the same horizontal line. The inner wall flange is cut off by a ring cutter. Combined with a dual heating plate driven by a servo motor, automated heating is achieved, avoiding manual operation.
It improves the accuracy of pipe connection, reduces adjustment time, ensures smooth and flat weld joints, and improves work efficiency and safety.
Smart Images
Figure CN117901418B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of hot melt butt welding machine technology, and in particular to an operating method for a high-precision butt welding device for welding large-diameter pipes. Background Technology
[0002] The hot melt butt welding machine uses electric heating to transfer heat from the heating plate to the welding surface of the plastic pipe, causing the surface to melt. Then the heating plate is quickly removed. After the ends of the two pipes are heated, the molten surfaces fuse, solidify, and become one. It is used for hot melt welding of pipes. However, existing hot melt butt welding machines still have some problems.
[0003] Currently available welding machines suffer from low pipe joining accuracy, making it difficult to achieve a successful connection on the first attempt. Misalignment is common, requiring repeated adjustments, which is time-consuming and labor-intensive. To address this issue, we propose an operating method for a high-precision pipe joining device used for welding large-diameter pipes. Summary of the Invention
[0004] To overcome the shortcomings of existing technologies, this invention provides an operating method for a high-precision butt welding device for large-diameter pipes. By setting a fixing core to be inserted into the inner side of two pipe sections, the centers of the two pipe sections are kept on the same horizontal line, which greatly improves the accuracy of pipe butt welding, reduces adjustments, and improves work efficiency. Furthermore, after removing the fixing core, the flange of the inner wall can be cut off and brought out, ensuring that the weld joint is smooth and flat after hot melt welding, keeping the pipe unobstructed and not affecting subsequent use.
[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an operation method for a high-precision butt welding device for large-diameter pipe welding, the high-precision butt welding device for large-diameter pipe welding includes a welding machine, a movable frame is provided at the top of the welding machine, a pipe is passed through the middle of the movable frame, a fixed core is provided on one side of the pipe, one end of the fixed core is located inside the pipe, a groove is formed in the middle of the fixed core, an annular blade is fixedly connected to the inner wall of the groove, a fixed groove is formed in the inner wall of the groove, a first heat insulation pad is provided inside the fixed groove, a first heating plate is fixedly connected to the surface of the first heat insulation pad, and a hook is fixedly connected to one side of the fixed core.
[0006] Preferably, a second heating plate is provided on the front surface of the first heating plate, a second heat insulation pad is fixedly connected to the inner side of the second heating plate, a second gear is fixedly connected to the bottom end of the first heating plate, a first gear is fixedly connected to the bottom end of the second heating plate, the first gear and the second gear are meshed together, a servo motor is provided on one side of the second gear, a pinion is fixedly connected to the output end of the servo motor, and the pinion is meshed together with the second gear.
[0007] Preferably, the fixing core has an inner groove inside, and there are two inner grooves in total.
[0008] Preferably, the cross-section of one side of the fixing core is configured as an arc-shaped structure.
[0009] Preferably, there are two hooks in total.
[0010] Preferably, there are two annular blades.
[0011] Compared with the prior art, the beneficial effects that this invention can achieve are:
[0012] 1. By setting a fixing core to be inserted into the inside of the two pipe sections, the centers of the two pipe sections are kept on the same horizontal line, which greatly improves the accuracy of pipe connection, reduces adjustments, and improves work efficiency. After removing the fixing core, the flange of the inner wall can be cut off and taken out, ensuring that the weld joint is smooth and flat after hot melt welding, keeping the pipe unobstructed and not affecting subsequent use.
[0013] 2. By setting up a first heating plate and a second heating plate, there is no need for manual back-and-forth pulling of the first heating plate, avoiding burns and greatly improving safety. The opening and closing operation is simple, saving time and effort. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of a structure according to an embodiment of the present invention;
[0015] Figure 2 This is a side cross-sectional view of the first heating plate of the present invention.
[0016] The components include: 1. Welding machine; 2. Moving frame; 3. Pipe; 4. Fixed core; 5. Groove; 6. Fixed slot; 7. Ring knife; 8. First heating plate; 9. First heat insulation pad; 10. Inner groove; 11. Hook; 12. First gear; 13. Second gear; 14. Second heat insulation pad; 15. Second heating plate; 16. Servo motor. Detailed Implementation
[0017] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.
[0018] Example:
[0019] like Figure 1 and Figure 2 As shown, an operation method of a high-precision butt welding device for large-diameter pipe welding is described. The high-precision butt welding device for large-diameter pipe welding includes a welding machine 1, a movable frame 2 at the top of the welding machine 1, a pipe 3 passing through the middle of the movable frame 2, a fixed core 4 on one side of the pipe 3, one end of the fixed core 4 being inside the pipe 3, a groove 5 in the middle of the fixed core 4, a ring blade 7 fixedly connected to the inner wall of the groove 5, a fixed groove 6 in the inner wall of the groove 5, a first heat insulation pad 9 on the inner side of the fixed groove 6, a first heating plate 8 fixedly connected to the surface of the first heat insulation pad 9, and a hook 11 fixedly connected to one side of the fixed core 4.
[0020] Currently, there is a welding machine 1. During use, the pipe 3 has low docking accuracy, making it difficult to dock successfully on the first attempt. It is prone to misalignment and requires repeated adjustments, which is time-consuming and laborious. By setting a fixing core 4, the pipe 3 is placed on the surface of the moving frame 2. The moving frame 2 clamps the pipe 3 and moves it towards the fixing core 4 until the fixing core 4 enters the inside of the pipe 3. The moving frame 2 continues to move, and one end of the pipe 3 is tightly attached to the first heating plate 8. The first heating plate 8 begins to heat and melt the end of the pipe 3. After heating for a period of time, the moving frame 2 is moved back a certain distance, so that the pipe 3 is separated from the surface of the first heating plate 8. Then, the first heating plate 8 and the second heating plate 15 are rotated and lowered to the outside of the welding machine 1. The first heating plate 8 no longer supports the fixing core 4, and the frame 2 continues to move forward, squeezing the two sections of the pipe 3. The heated ends of the two sections of the pipe 3 are tightly attached. After cooling and solidification, the hot-melt welding is completed. Then, the rope hanging on the hook 11 is pulled to remove the fixing core 4 from the inside of the pipe 3. The fixing core 4 slides inside the pipe 3. The molten pipe 3 is squeezed and will develop a flange. The solidified flange protrudes towards the inner wall and outer surface of the pipe 3. The ring cutter 7 fits against the inner wall of the pipe 3. During the movement of the ring cutter 7, the flange of the inner wall of the pipe 3 is cut off and brought out from the inside of the pipe 3, completing the operation. By setting the fixing core 4 to be inserted into the inside of the two pipe sections 3, the centers of the two pipe sections 3 are kept on the same horizontal line, which greatly improves the accuracy of pipe 3 docking, reduces adjustments, and improves work efficiency. After removing the fixing core 4, the flange of the inner wall can be cut off and brought out, ensuring that the weld joint is smooth and flat after hot-melt welding, keeping the pipe unobstructed and not affecting subsequent use.
[0021] In other embodiments, this embodiment discloses, please refer to Figure 1 and Figure 2As shown, a second heating plate 15 is provided on the front surface of the first heating plate 8, a second heat insulation pad 14 is fixedly connected to the inner side of the second heating plate 15, a second gear 13 is fixedly connected to the bottom end of the first heating plate 8, a first gear 12 is fixedly connected to the bottom end of the second heating plate 15, the first gear 12 and the second gear 13 are meshed and connected, a servo motor 16 is provided on one side of the second gear 13, a pinion is fixedly connected to the output end of the servo motor 16, and the pinion is meshed and connected to the second gear 13;
[0022] When opening and closing the first heating plate 8 and the second heating plate 15, the servo motor 16 is started first. The servo motor 16 drives the pinion to rotate, which in turn drives the second gear 13 to rotate. The second gear 13 then drives the first gear 12 to rotate, which in turn drives the first heating plate 8 to rotate counterclockwise around the second gear 13. The first gear 12 then drives the second heating plate 15 to rotate clockwise around the first gear 12, causing the first heating plate 8 and the second heating plate 15 to open outwards and no longer obstruct the horizontal movement of the pipe 3. By setting the first heating plate 8 and the second heating plate 15, there is no need for manual back-and-forth pulling of the first heating plate 8, avoiding burns and greatly improving safety. The opening and closing operation is simple, saving time and effort.
[0023] In other embodiments, this embodiment discloses, please refer to Figure 1 As shown, the fixing core 4 has an inner groove 10 inside, and there are two inner grooves 10 in total. By setting the fixing core 4 to have an inner groove 10 inside, and there are two inner grooves 10 in total, the weight at both ends of the fixing core 4 is reduced, making it easier to pull out the fixing core 4.
[0024] In other embodiments, this embodiment discloses, please refer to Figure 1 As shown, the cross-section of one side of the fixing core 4 is set as an arc structure; by setting the cross-section of one side of the fixing core 4 as an arc structure, it is convenient to insert it into the inside of the pipe 3.
[0025] In other embodiments, this embodiment discloses, please refer to Figure 1 As shown, there are two hooks 11 in total; by setting there are two hooks 11, it is convenient to pull out the fixing core 4 from two directions, and at the same time, it is convenient to lift the fixing core 4.
[0026] In other embodiments, this embodiment discloses, please refer to Figure 1 As shown, there are two ring cutters 7 in total; by setting there are two ring cutters 7, it is convenient to cut and turn the edge.
[0027] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.
Claims
1. An operation method for a high-precision butt welding device for large-diameter pipe welding, comprising a welding machine (1), a movable frame (2) provided at the top of the welding machine (1), a pipe (3) passing through the middle of the movable frame (2), a fixed core (4) provided on one side of the pipe (3), one end of the fixed core (4) being inside the pipe (3), a groove (5) provided in the middle of the fixed core (4), an annular blade (7) fixedly connected to the inner wall of the groove (5), a fixed groove (6) provided on the inner wall of the groove (5), a first heat insulation pad (9) provided inside the fixed groove (6), a first heating plate (8) fixedly connected to the surface of the first heat insulation pad (9), and a hook (11) fixedly connected to one side of the fixed core (4); A second heating plate (15) is provided on the front surface of the first heating plate (8). A second heat insulation pad (14) is fixedly connected to the inner side of the second heating plate (15). A second gear (13) is fixedly connected to the bottom end of the first heating plate (8). A first gear (12) is fixedly connected to the bottom end of the second heating plate (15). The first gear (12) meshes with the second gear (13). A servo motor (16) is provided on one side of the second gear (13). A small gear is fixedly connected to the output end of the servo motor (16). The small gear meshes with the second gear (13). Its features are, In use, place the pipe (3) on the surface of the moving frame (2), the moving frame (2) clamps the pipe (3) and moves it toward the fixed core (4) until the fixed core (4) enters the inside of the pipe (3), and continue to move the moving frame (2). One end of the pipe (3) is tightly attached to the first heating plate (8), and the first heating plate (8) begins to heat and melt the end of the pipe (3). After heating for a period of time, move the moving frame (2) back a distance so that the pipe (3) separates from the surface of the first heating plate (8). Then rotate the first heating plate (8) and the second heating plate (15) to the outside of the welding machine (1) and lower them. The first heating plate (8) no longer supports the fixed core. (4) Continue to start the frame (2) to move forward and squeeze the two pipe sections (3). The heated ends of the two pipe sections (3) are tightly fitted together. After cooling, they solidify and complete the hot melt welding. Then pull the rope hanging on the surface of the hook (11) to pull the fixing core (4) out from the inside of the pipe (3). The fixing core (4) slides inside the pipe (3). The melted pipe (3) will be squeezed and will turn over. The solidified turn over protrudes to the inner wall and outer surface of the pipe (3). The ring cutter (7) fits against the inner wall of the pipe (3). During the movement of the ring cutter (7), the turn over inside the pipe (3) is cut off and the cut turn over is brought out from the inside of the pipe (3) to complete the operation.
2. The operating method of the high-precision butt welding device for large-diameter pipe welding according to claim 1, characterized in that: The fixing core (4) has an inner groove (10) inside, and there are two inner grooves (10).
3. The operating method of the high-precision butt welding device for large-diameter pipe welding according to claim 1, characterized in that: The cross-section of one side of the fixed core (4) is set as an arc structure.
4. The operating method of the high-precision butt welding device for large-diameter pipe welding according to claim 1, characterized in that: There are two hooks (11).
5. The operating method of the high-precision butt welding device for large-diameter pipe welding according to claim 1, characterized in that: The number of the ring cutter (7) is set to two.