Automatic welding equipment for pipe fittings
By using the positioning plate and arc-shaped plate clamping structure of the automatic welding equipment for tubular parts, combined with the design of the vent pipe and disc, the problems of difficult welding torch alignment and weld oxidation are solved, achieving efficient and accurate welding results.
Patent Information
- Application Number
- CN202511350049.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-22
- Publication Date
- 2025-10-31
AI Technical Summary
In existing technologies, aiming the welding torch at the weld seam of the steel pipe is time-consuming and laborious, especially when working at height or in confined spaces, the positioning accuracy is difficult to guarantee, which can easily lead to defects such as weld seam misalignment or lack of fusion.
An automatic welding equipment for tubular components is adopted. The positioning plate assists in positioning the tungsten needle, and the steel pipe is clamped by the arc plate and fastening unit. The protective gas is introduced through the vent pipe to remove the air near the weld. The disc structure is designed to adapt to different pipe shapes.
It enables rapid and accurate alignment of the weld seam, improves welding efficiency, prevents weld seam oxidation, and adapts to the welding needs of different pipe types.
Smart Images
Figure CN120862002A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of welding technology, and in particular to an automatic welding equipment for tubular components. Background Technology
[0002] As a type of tubular component, steel pipes are often connected by automated pipe welding equipment in industrial steel pipe installation. Before welding, the welding torch (tungsten needle) must be precisely aligned and stably held directly above the weld seam where the two steel pipes meet. This process is time-consuming and labor-intensive, especially when working at height or in confined spaces, where positioning accuracy is even more difficult to guarantee. Defects such as weld seam displacement or incomplete fusion are easily caused by visual errors or operational inconvenience. Summary of the Invention
[0003] To overcome the drawbacks of the time-consuming and labor-intensive process of precisely aligning and stably holding the welding torch (tungsten needle) above the weld seam of two steel pipes before welding, especially when working at heights or in confined spaces, the positioning accuracy is even more difficult to guarantee, and defects such as weld seam displacement or incomplete fusion are easily caused by visual errors or inconvenience of operation. This invention provides an automatic welding equipment for tubular components.
[0004] The technical solution is as follows: An automatic welding equipment for tubular components includes a mounting base and a mounting ring fixed to the mounting base; it also includes a power unit connected to the mounting base; the power unit is connected to the mounting ring, and the mounting ring has a notch; the power unit is connected to a tungsten needle, and the power unit is used to drive the tungsten needle to perform circular motion; an arc-shaped plate 1 is fixed to each side of the mounting ring; an arc-shaped plate 2 is rotatably connected to each arc-shaped plate 1; an arc-shaped fixing plate is slidably connected to each arc-shaped plate 1 and its corresponding arc-shaped plate 2, and each arc-shaped fixing plate has an arc-shaped groove matching the steel pipe to be welded; a fastening unit is connected to the arc-shaped plate 1 and its corresponding arc-shaped plate 2, and the fastening unit is used to fix the arc-shaped plate 1 and its corresponding arc-shaped plate 2 together; an arc-shaped baffle is fixed to one of the arc-shaped plates 2; a connecting rod is slidably connected to the arc-shaped fixing plate on one side of the arc-shaped plate 1; a positioning plate is fixed to the end of the connecting rod facing the tungsten needle; one side of the positioning plate is on the same plane as the axis of the tungsten needle.
[0005] Optionally, the power unit includes a motor fixedly mounted on the mounting base; a gear fixedly mounted on the motor output shaft; a toothed ring rotatably connected inside the mounting ring; the gear meshes with the toothed ring; and the inner side of the toothed ring is fixedly connected to a tungsten needle.
[0006] Optionally, the curved baffle can be made transparent.
[0007] Optionally, the outer surface of the connecting rod is provided with an anti-slip sleeve.
[0008] Optionally, a limiting plate is fixed to the connecting rod, and the limiting plate contacts the arc-shaped fixing piece.
[0009] Optionally, the fastening unit includes a pin and a perforated plate fixed to each of the two arc-shaped plates; a pin is slidably connected to each of the two arc-shaped plates; and each pin is engaged with a perforated plate.
[0010] Optionally, it also includes a vent pipe; the vent pipe runs through the middle of the arc-shaped baffle and is used to introduce protective gas.
[0011] Optionally, an annular sealing ring is provided at the contact point between the arc-shaped baffle and the vent pipe.
[0012] Optionally, it also includes an arc-shaped rubber strip; each arc-shaped fixing piece is respectively fixed with an arc-shaped rubber strip in the middle.
[0013] Optionally, it also includes a disc; a disc is fixedly attached to the positioning plate; a vent pipe is directly opposite the disc, and an arc-shaped baffle is slidably connected to the vent pipe; vent grooves are opened on both sides of the disc, the two vent grooves are symmetrically arranged, and the disc and the positioning plate have the same thickness.
[0014] The beneficial effects of the present invention are: 1. The present invention uses a positioning plate to assist in positioning, which can quickly align the tungsten needle with the contact point (i.e., weld) of two steel pipes, without requiring a lot of manual effort to adjust, thus significantly improving work efficiency.
[0015] 2. The present invention introduces protective gas into a sealed space consisting of an installation ring, an arc plate one, an arc plate two, an arc fixing piece, and an arc baffle through a vent pipe. The gas then enters the pipe through the gap between the two steel pipes, expelling the air near the weld and thus effectively preventing weld oxidation during welding.
[0016] 3. This invention separates two steel pipes by a disc. The protective gas output from the vent pipe enters the left and right steel pipes through the vent grooves on both sides of the disc, and simultaneously removes the air inside the pipes. This design is not affected by the shape of the steel pipe (such as a combination of straight pipe and spiral pipe) and can effectively avoid the problem of air residue near the welding point of special pipe types such as spiral pipe. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of the automatic welding equipment for tubular components according to the present invention;
[0018] Figure 2 This is a three-dimensional structural diagram of the motor, gear, toothed ring, and tungsten needle of the automatic welding equipment for tubular parts of the present invention.
[0019] Figure 3 This is a three-dimensional structural diagram of the connecting rod, positioning plate, anti-slip sleeve, and limiting plate of the automatic welding equipment for tubular parts of the present invention.
[0020] Figure 4 This is a schematic diagram showing the clamping state of the steel pipe in the automatic welding equipment for tubular components of the present invention;
[0021] Figure 5 This is a schematic diagram of the disc in use of the automatic welding equipment for tubular components according to the present invention;
[0022] Figure 6 This is a schematic diagram of the straight tube and spiral tube combination of the present invention.
[0023] The markings in the attached diagram are: 1-mounting base, 2-mounting ring, 201-notch, 3-motor, 4-gear, 5-toothed ring, 6-tungsten needle, 7-arc plate one, 8-arc plate two, 701-pin, 801-perforated plate, 9-arc-shaped fixing piece, 10-arc-shaped baffle, 11-connecting rod, 12-positioning plate, 13-anti-slip sleeve, 14-limiting plate, 21-vent pipe, 22-arc-shaped rubber strip, 23-disc, 2301-vent groove. Detailed Implementation
[0024] The following description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.
[0025] Example 1: An automatic welding equipment for tubular components, such as Figures 1-5 As shown, it includes a mounting base 1 and a mounting ring 2; the mounting base 1 is fixedly connected to the mounting ring 2;
[0026] It also includes a power unit, tungsten needle 6, arc plate one 7, arc plate two 8, fastening unit, arc fixing plate 9, arc baffle 10, connecting rod 11, and positioning plate 12; the power unit is connected to the mounting base 1; the power unit is connected to the mounting ring 2, and the mounting ring 2 has a notch 201; the power unit is connected to the tungsten needle 6; an arc plate one 7 is welded to the left and right sides of the mounting ring 2 respectively; an arc plate two 8 is rotatably connected to each arc plate one 7; each arc plate one 7 and each arc plate two 8... An arc-shaped fixing plate 9 is slidably connected to each of the 8 plates. Each arc-shaped fixing plate 9 has an arc-shaped groove that matches the steel pipe to be welded. A fastening unit is connected to each arc-shaped plate 7 and the corresponding arc-shaped plate 8. An arc-shaped baffle 10 is welded to the arc-shaped plate 8 on the left side. A connecting rod 11 is slidably connected to the arc-shaped fixing plate 9 on the arc-shaped plate 7 on the left side. A positioning plate 12 is welded to the end of the connecting rod 11 facing the tungsten needle 6. One side of the positioning plate 12 is on the same plane as the axis of the tungsten needle 6.
[0027] The power unit includes a motor 3, a gear 4, and a toothed ring 5; the motor 3 is bolted to the mounting base 1; the gear 4 is fixedly connected to the output shaft of the motor 3; the toothed ring 5 is rotatably connected inside the mounting ring 2; the gear 4 meshes with the toothed ring 5; the inner side of the toothed ring 5 is fixedly connected to a tungsten needle 6.
[0028] To facilitate manual observation of the welding process, the arc-shaped baffle 10 is made transparent.
[0029] To facilitate manual pulling and rotation of the connecting rod 11, an anti-slip sleeve 13 is provided on the outer surface of the connecting rod 11.
[0030] To facilitate quick manual setting of the positions of the connecting rod 11 and the positioning plate 12, a limiting plate 14 is welded onto the connecting rod 11, and the limiting plate 14 contacts the arc-shaped fixing piece 9.
[0031] The fastening unit includes a pin 701 and a perforated plate 801; a pin 701 is slidably connected to each arc plate 7; a perforated plate 801 is welded to each arc plate 8; and each pin 701 is inserted into a perforated plate 801.
[0032] by Figure 1 Based on the viewing angle, the side where the mounting ring 2 is located is the front side.
[0033] In use, manually hold the mounting base 1 and move it to position it directly below the end of the steel pipe to be welded. Then, move the mounting base 1 upwards so that the steel pipe to be welded passes through the notch 201 and is placed on the arc-shaped groove of the arc-shaped fixing piece 9 on the left arc-shaped plate 7, so that the positioning plate 12 is located on the right side of the steel pipe to be welded. Then, manually move the mounting base 1 to the left, and the positioning plate 12 moves with the mounting base 1, so that the left side of the positioning plate 12 contacts the right side of the steel pipe. Because the left side of the positioning plate 12 is on the same plane as the axis of the tungsten needle 6, the axis of the tungsten needle 6 is also on the same plane as the right side of the steel pipe. Figure 2As shown, this facilitates subsequent welding. Next, using a right-to-left viewing reference, manually rotate the left arc-shaped plate 28 clockwise until the arc-shaped fixing piece 9 on the left arc-shaped plate 28 contacts the arc-shaped fixing piece 9 on the left arc-shaped plate 17. The two arc-shaped fixing pieces 9 clamp the steel pipe. At this time, the insertion hole of the perforated plate 801 on the arc-shaped plate 28 is aligned with the pin 701. Then, manually push the pin 701 so that the pin 701 is inserted into the hole of the perforated plate 801. In this way, the entire equipment is fixed to the left steel pipe. Arc-shaped baffle 10 Following the rotation of the arc-shaped plate 8, the arc-shaped baffle 10 contacts the mounting ring 2, blocking the notch 201 on the mounting ring 2; then, manually rotate the connecting rod 11 and the positioning plate 12, causing the positioning plate 12 to rotate below the steel pipe, and then pull the connecting rod 11 and the positioning plate 12 to the left, causing the connecting rod 11 and the positioning plate 12 to move away from the rotation welding trajectory of the tungsten needle 6; then, manually place the end of another steel pipe on the arc-shaped groove of the arc-shaped fixing piece 9 on the right arc-shaped plate 7, and then push the steel pipe to the left, so that... When the two steel pipes come into contact, the tungsten needle 6 is directly opposite the contact point of the two steel pipes. Then, using a view from right to left as a reference, manually rotate the right arc plate 2 8 clockwise so that the arc fixing piece 9 on the right arc plate 2 8 comes into contact with the arc fixing piece 9 on the right arc plate 1 7. The two arc fixing pieces 9 clamp the right steel pipe. At this time, the insertion hole of the perforated plate 801 on the arc plate 2 8 is directly opposite the pin 701. Then, manually push the pin 701 so that the pin 701 is inserted into the hole of the perforated plate 801, completing the fixing operation. By energizing the tungsten needle 6 (cathode) with a power source, a high-temperature electric arc is formed between the tungsten needle 6 and the steel pipe. The heat of the arc is concentrated on the surface of the steel pipe, melting the contact area between the two steel pipes to form a molten pool. At the same time, the motor 3 drives the gear 4 to drive the toothed ring 5 and the tungsten needle 6 to rotate, so that the tungsten needle 6 rotates around the contact area between the two steel pipes for one revolution, thus welding the two steel pipes together. Through the above operation, the tungsten needle 6 can be quickly aligned with the contact area between the two steel pipes, i.e., the welding point, without the need for manual adjustment, which significantly improves work efficiency.
[0034] After welding is completed, pull the pin 701 to remove it from the opening of the perforated plate 801. Using a right-to-left view as a reference, rotate the arc plate 8 counterclockwise to separate the arc-shaped fixing piece 9 on the arc plate 8 from the arc-shaped fixing piece 9 on the arc plate 7, thus no longer clamping the steel pipe. Then, remove the equipment from the steel pipe. When performing the next welding operation, readjust the position of the positioning plate 12 so that its left side is in the same plane as the axis of the tungsten needle 6. To facilitate quick manual setting of the position of the positioning plate 12, a limit plate 14 is welded on the connecting rod 11. The operator only needs to push the connecting rod 11 so that the limit plate 14 on the connecting rod 11 contacts the arc-shaped fixing piece 9. At this time, the left side of the positioning plate 12 is in the same plane as the axis of the tungsten needle 6.
[0035] Example 2: Based on Example 1, such as Figures 1-6As shown, it also includes a vent pipe 21; the vent pipe 21 passes through the middle of the arc-shaped baffle 10.
[0036] To ensure a good seal, an annular sealing ring is provided at the contact point between the arc-shaped baffle 10 and the vent pipe 21.
[0037] It also includes an arc-shaped rubber strip 22; each arc-shaped fixing piece 9 is respectively fixed with an arc-shaped rubber strip 22, the arc-shaped rubber strip 22 seals the gap between the steel pipe and the arc-shaped fixing piece 9, thereby playing a sealing role.
[0038] It also includes a disc 23; a disc 23 is welded on the positioning plate 12; a vent pipe 21 is directly opposite the disc 23, and an arc-shaped baffle 10 is slidably connected to the vent pipe 21; a vent groove 2301 is opened on both sides of the disc 23, and the two vent grooves 2301 are arranged symmetrically from left to right, and the disc 23 and the positioning plate 12 have the same thickness.
[0039] Before welding, a protective gas (such as argon) is usually introduced into the steel pipe to purge the air near the weld joint and prevent oxidation of the weld, which would affect the welding quality. Generally, a gas pipe needs to be connected to one end of the steel pipe, and then the protective gas is introduced into the steel pipe through the gas pipe to the weld joint. For longer steel pipes, where the pipe end is far from the weld joint, it takes a long time to introduce the protective gas and consumes a large amount of gas. Therefore, an external air pump is connected to the vent pipe 21 beforehand. After fixing the entire device to the left steel pipe, the end of the other steel pipe is first placed directly on the arc-shaped groove of the arc-shaped fixing piece 9 on the right arc-shaped plate 7. Then, the steel pipe is pushed to the left, so that it abuts against the right side of the positioning plate 12. Then, the arc-shaped fixing piece 9 on the right arc-shaped plate 8 contacts the arc-shaped fixing piece 9 on the right arc-shaped plate 7. The two arc-shaped fixing pieces 9 clamp the right steel pipe, creating a gap between the two pipes. An external air pump is used to introduce protective gas (such as argon) through a vent pipe 21 into the sealed space formed by the mounting ring 2, arc-shaped plate 7, arc-shaped plate 8, arc-shaped fixing plate 9, and arc-shaped baffle 10. The introduced protective gas gradually fills the sealed space. Air within the sealed space flows into the two steel pipes through the gap between them. As more protective gas is introduced, it flows into the two steel pipes through the gap between them, thus purifying the area near the weld joint of the two steel pipes. Air is expelled to prevent weld oxidation during welding. Then, the connecting rod 11 and the positioning plate 12 are manually rotated so that the positioning plate 12 is rotated below the steel pipe. Then, the connecting rod 11 and the positioning plate 12 are pulled to the left so that the connecting rod 11 and the positioning plate 12 are moved away from the rotation trajectory of the tungsten needle 6. Then, the steel pipe on the right is pushed to the left so that the two steel pipes come into contact with each other. Then, the right pin 701 is manually pushed so that the pin 701 is inserted into the hole of the perforated plate 801 to complete the fixing operation.
[0040] An arc-shaped rubber strip 22 is provided on the arc-shaped fixing plate 9. Two arc-shaped rubber strips 22 on the same side form a sealing ring that contacts the steel pipe, thus ensuring airtightness and preventing air from entering the sealed space formed by the mounting ring 2, arc-shaped plate 7, arc-shaped plate 8, arc-shaped fixing plate 9 and arc-shaped baffle 10, thereby avoiding any impact on the welding quality.
[0041] When one steel pipe in a welded pipeline is a straight pipe and the other is a spiral pipe, such as Figure 6 As shown, the resistance encountered by gas flowing in the spiral tube is significantly greater than that encountered in the straight tube. This causes the protective gas (such as argon) to tend to flow towards the straight tube when the external gas pump introduces it through the vent pipe 21 into the sealed space composed of the mounting ring 2, arc-shaped plate 7, arc-shaped plate 8, arc-shaped fixing plate 9, and arc-shaped baffle 10. This poses a risk that air near the welding point of the spiral tube may not be completely expelled, leading to oxidation of the weld during welding. Therefore, a disc 23 is provided. After fixing the equipment to one of the steel pipes, the connecting rod 11 on the arc-shaped fixing plate 9 is manually rotated, causing the connecting rod 11 to rotate the positioning plate 12 and the disc 23, so that the disc 23 rotates to the right of the steel pipe. Then, the mounting base 1 is manually moved to the left. Position plate 12 and disc 23 move with mounting base 1, so that the left side of disc 23 contacts the right side of steel pipe. Then, using a right-to-left view as a reference, manually rotate the left arc plate 28 clockwise, so that the arc-shaped fixing piece 9 on the left arc plate 28 contacts the arc-shaped fixing piece 9 on the left arc plate 1 7. The two arc-shaped fixing pieces 9 clamp the steel pipe. At this time, the insertion hole of the perforated plate 801 on the arc plate 28 is aligned with the pin 701. Then, manually push the pin 701 so that the pin 701 is inserted into the hole of the perforated plate 801, thus fixing the entire device to the left steel pipe. Then, place the end of another steel pipe on the arc-shaped groove of the arc-shaped fixing piece 9 on the right arc plate 1 7, and then push the steel pipe to the left so that the steel pipe abuts against the right side of the two discs 23. Figure 5As shown; then rotate the upper arc plate 28 to contact the arc plate 1 7, and the two corresponding arc fixing plates 9 contact each other to clamp the steel pipe on the right. Then, control the external air pump to introduce protective gas (such as argon) through the vent pipe 21 into the sealed space formed by the mounting ring 2, arc plate 1 7, arc plate 2 8, arc fixing plate 9 and arc baffle 10. The introduced protective gas squeezes out the air in the sealed space. The air enters the steel pipes on both sides simultaneously through the vent grooves 2301 on the left and right sides of the disc 23. Then, manually push the vent pipe 21 downward so that the lower end of the vent pipe 21 abuts against the vent grooves 2301 on the left and right sides of the disc 23. Since the disc 23 separates the two steel pipes, the protective gas output from the vent pipe 21 is respectively The air enters the steel pipes on both sides through the venting grooves 2301 on the left and right sides of the disc 23, simultaneously venting the air from both steel pipes. This is unaffected by the shape of the two steel pipes and avoids the risk of incomplete air removal near the welding point of the spiral pipe. Then, the connecting rod 11, positioning plate 12, and disc 23 are manually rotated to the side of the steel pipe. The connecting rod 11, positioning plate 12, and disc 23 are then pulled to the left, moving them away from the rotation trajectory of the tungsten needle 6. The steel pipe on the right side is then pushed to the left, bringing the two steel pipes into contact. The right pin 701 is then manually pushed to insert into the hole of the perforated plate 801, completing the fixing operation. Finally, the welding operation can be performed.
[0042] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.
Claims
1. An automatic welding device for tubular components, comprising a mounting base (1) and a mounting ring (2) fixedly connected to the mounting base (1); characterized in that, It also includes a power unit connected to the mounting base (1); the power unit is connected to the mounting ring (2), and the mounting ring (2) has a notch (201); the power unit is connected to a tungsten needle (6), and the power unit is used to drive the tungsten needle (6) to make a circular motion; an arc-shaped plate (7) is fixedly connected to each side of the mounting ring (2); an arc-shaped plate (8) is rotatably connected to each arc-shaped plate (7) and each arc-shaped plate (8); an arc-shaped fixing piece (9) is slidably connected to each arc-shaped plate (7) and each arc-shaped plate (8), and each arc-shaped fixing piece (9) has a notch for the object to be fixed. The welded steel pipe is matched with an arc-shaped groove; each arc plate one (7) and the corresponding arc plate two (8) are respectively connected to a fastening unit, which is used to fix the arc plate one (7) and the corresponding arc plate two (8) together; an arc-shaped baffle (10) is fixedly connected to one of the arc plates two (8); an arc-shaped fixing piece (9) on one side of the arc plate one (7) is slidably connected to a connecting rod (11); a positioning plate (12) is fixedly connected to one end of the connecting rod (11) facing the tungsten needle (6); one side of the positioning plate (12) is on the same plane as the axis of the tungsten needle (6).
2. The automatic welding equipment for tubular components according to claim 1, characterized in that, The power unit includes a motor (3) fixedly mounted on the mounting base (1); a gear (4) is fixedly mounted on the output shaft of the motor (3); a toothed ring (5) is rotatably connected inside the mounting ring (2); the gear (4) meshes with the toothed ring (5); the inner side of the toothed ring (5) is fixedly mounted to a tungsten needle (6).
3. The automatic welding equipment for tubular components according to claim 2, characterized in that, The curved baffle (10) is set to be transparent.
4. The automatic welding equipment for tubular components according to claim 2, characterized in that, The outer surface of the connecting rod (11) is provided with an anti-slip sleeve (13).
5. The automatic welding equipment for tubular components according to claim 2, characterized in that, A limiting plate (14) is fixedly attached to the connecting rod (11), and the limiting plate (14) contacts the arc-shaped fixing piece (9).
6. The automatic welding equipment for tubular components according to claim 5, characterized in that, The fastening unit includes a pin (701) and an opening plate (801) fixed on each arc plate (8); a pin (701) is slidably connected on each arc plate (7); each pin (701) is engaged with an opening plate (801).
7. An automatic welding equipment for tubular components according to claim 6, characterized in that, It also includes a vent pipe (21); the vent pipe (21) runs through the middle of the arc-shaped baffle (10), and the vent pipe (21) is used to introduce protective gas.
8. An automatic welding equipment for tubular components according to claim 7, characterized in that, An annular sealing ring is provided at the contact point between the arc-shaped baffle (10) and the vent pipe (21).
9. An automatic welding equipment for tubular components according to claim 7, characterized in that, It also includes an arc-shaped rubber strip (22); each arc-shaped fixing piece (9) has an arc-shaped rubber strip (22) fixedly attached to a portion of it.
10. An automatic welding equipment for tubular components according to claim 9, characterized in that, It also includes a disc (23); a disc (23) is fixedly attached to the positioning plate (12); the vent pipe (21) is directly opposite the disc (23), and the arc-shaped baffle (10) is slidably connected to the vent pipe (21); there are vent grooves (2301) on both sides of the disc (23), the two vent grooves (2301) are symmetrically arranged, and the disc (23) and the positioning plate (12) have the same thickness.