Welding device for stainless steel welded pipe with uniform wall thickness

Abstract

The utility model relates to the technical field of stainless steel welded pipe welding, in particular to a welding device for a stainless steel welded pipe with uniform wall thickness. According to the technical scheme, the welding device comprises rolling wheels and a welding cover, a welding head is fixedly installed in the welding cover, the rolling wheels are rotatably installed on the two sides of the lower surface of the welding cover through wheel shafts, a conveying roller is rotatably installed on one side in the welding cover through a conveying shaft, and a pressing roller is rotatably installed at the position, above the conveying roller, in the welding cover; a guide pipe is fixedly installed at the position, close to the inner side of the conveying roller, in the welding cover, synchronous chain wheels are fixedly connected to the tail ends of the wheel shafts and the tail ends of the conveying rollers, and the two synchronous chain wheels are in transmission connection through a transmission chain. In the welding process of the stainless steel welded pipe, the supply speed of the welding wire is synchronous with the moving speed of the welding head, so that the thickness of the pipe wall at the welding seam of the stainless steel welded pipe is uniform, and the quality of the stainless steel welded pipe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stainless steel welded pipe welding, in particular to a welding device for stainless steel welded pipes with uniform wall thickness. Background Art

[0002] Stainless steel welded pipe is a steel pipe made by curling steel or steel strip through a unit and a mold and then welding it. The production process of stainless steel welded pipe is simple, the production efficiency is high, the variety and specifications are wide, and the equipment investment is low, but the general strength is lower than that of seamless steel pipe.

[0003] Currently, stainless steel welded pipes are usually welded by argon arc welding. However, during the welding process, the supply speed of the welding wire does not match the speed of the welding head movement, which can easily lead to uneven pipe wall at the weld of the stainless steel welded pipe, reducing the quality of the stainless steel welded pipe. Therefore, we propose a welding device for stainless steel welded pipes with uniform wall thickness. Utility Model Content

[0004] The purpose of the utility model is to provide a welding device for stainless steel welded pipes with uniform wall thickness. The device has the advantages that during the welding process of the stainless steel welded pipe, the supply speed of the welding wire is synchronized with the moving speed of the welding head, so that the pipe wall thickness at the weld seam of the stainless steel welded pipe is uniform, thereby improving the quality of the stainless steel welded pipe. It solves the problem that the current stainless steel welded pipe is usually welded by argon arc welding, and during the welding process, the supply of the welding wire is not matched with the moving speed of the welding head, which easily leads to uneven pipe wall at the weld seam of the stainless steel welded pipe and reduces the quality of the stainless steel welded pipe.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a welding device for stainless steel welded pipes with uniform wall thickness, comprising a roller and a welding cover, a welding head fixedly installed inside the welding cover, rollers rotatably installed at both sides of the lower surface of the welding cover through axles, a conveying roller rotatably installed on one side of the welding cover through a conveying shaft, a pressure roller rotatably installed at a position above the conveying roller inside the welding cover, a guide tube fixedly installed near the inner side of the conveying roller inside the welding cover, a synchronous sprocket fixedly connected to the end of the axle and the conveying roller, and the two synchronous sprockets are connected by a transmission chain.

[0006] Preferably, a transmission protective cover is fixedly installed on one side of the front surface of the welding cover, and the two synchronous sprockets and the transmission chain are located inside the transmission protective cover, which protects the transmission chain and the synchronous sprocket.

[0007] Preferably, the outer surface of the conveying roller is provided with anti-skid protrusions to prevent the conveying roller from slipping when conveying the welding wire by friction, which is beneficial to the conveying of the welding wire.

[0008] Preferably, a bent pipe is fixedly connected to the side of the outer surface of the welding cover close to the conveying roller, which guides the welding wire entering between the conveying roller and the pressure roller, so that the welding wire can better enter between the conveying roller and the pressure roller.

[0009] Preferably, an argon gas input pipe is fixedly connected to one side of the upper surface of the welding cover, and one end of the argon gas input pipe located inside the welding cover is fixedly connected to a connecting pipe. The argon gas in the argon gas input pipe is blown toward the welding area through the connecting pipe to play an anti-oxidation role during the welding process and improve the welding quality.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] 1. The utility model achieves the effect of synchronizing the supply speed of the welding wire with the moving speed of the welding head during the welding of stainless steel welded pipes by arranging a welding cover, a welding head, a roller, an axle, a conveying roller, a pressure roller, a conveying shaft, a synchronous sprocket and a transmission chain. This makes the pipe wall thickness at the weld seam of the stainless steel welded pipe uniform, thereby improving the quality of the stainless steel welded pipe. The roller is in contact with the stainless steel welded pipe, and the welding cover spans the weld seam. When the welding cover or the stainless steel welded pipe moves and welds the weld seam through the welding head, the roller drives the conveying roller to rotate synchronously through the synchronous sprocket and the transmission chain. The conveying roller cooperates with the pressure roller to drive the welding wire to move, and the welding wire enters the weld seam after being guided by the guide pipe. The supply speed of the welding wire is synchronized with the moving speed of the welding head, thereby making the pipe wall thickness at the weld seam of the stainless steel welded pipe uniform, thereby improving the quality of the stainless steel welded pipe.

[0012] 2. The utility model provides a curved pipe to guide the welding wire entering between the conveying roller and the pressure roller, so that the welding wire can better enter between the conveying roller and the pressure roller.

[0013] 3. The utility model prevents the conveying roller from slipping when conveying the welding wire by friction by providing the anti-skid protrusion, which is beneficial to the conveying of the welding wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the partial main cross-sectional structure of the transmission protective cover of the utility model;

[0017] Figure 4 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0018] Figure 5 For this utility model Figure 4 Schematic diagram of the enlarged structure of A in the middle.

[0019] Figure markings: 1. Transmission protective cover; 2. Wheel axle; 3. Roller; 4. Welding cover; 5. Argon gas inlet pipe; 6. Bend pipe; 7. Synchronous sprocket; 8. Transmission chain; 9. Connecting pipe; 10. Welding head; 11. Guide pipe; 12. Pressure roller; 13. Conveyor roller; 14. Anti-slip protrusion; 15. Conveyor shaft. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1

[0022] like Figure 1-Figure 5 As shown, the utility model proposes a welding device for stainless steel welded pipes with uniform wall thickness, including a roller 3 and a welding cover 4. A welding head 10 is fixedly installed inside the welding cover 4. The welding head 10 cooperates with the welding wire to complete the welding of the stainless steel welded pipe weld. Rollers 3 are rotatably installed at both sides of the lower surface of the welding cover 4 through the wheel shaft 2. The welding cover 4 moves on the stainless steel welded pipe through the two rollers 3. A conveying roller 13 is rotatably installed on one side of the welding cover 4 through the conveying shaft 15. A pressure roller 12 is rotatably installed above the conveying roller 13 inside the welding cover 4. The outer surface of the conveying roller 13 The surface is provided with anti-slip protrusions 14 to prevent the conveying roller 13 from slipping when conveying the welding wire by friction, which is beneficial to the conveying of the welding wire. A guide tube 11 is fixedly installed inside the welding cover 4 near the inner side of the conveying roller 13. The welding wire conveyed by the conveying roller 13 is guided to the weld seam through the guide tube 11. The wheel axle 2 and the end of the conveying roller 13 are fixedly connected with a synchronous sprocket 7, and the two synchronous sprockets 7 are connected by a transmission chain 8. A transmission protective cover 1 is fixedly installed on one side of the front surface of the welding cover 4, and the two synchronous sprockets 7 and the transmission chain 8 are both located inside the transmission protective cover 1.

[0023] When the utility model is in use, the roller 3 is in contact with the stainless steel welded pipe, and the welding cover 4 spans the weld seam. When the welding cover 4 or the stainless steel welded pipe moves and the weld seam is welded by the welding head 10, the roller 3 synchronously drives the conveying roller 13 to rotate through the synchronous sprocket 7 and the transmission chain 8. The conveying roller 13 cooperates with the pressure roller 12 to drive the welding wire to move, and the welding wire enters the weld seam through the guidance of the guide tube 11. The supply speed of the welding wire is synchronized with the moving speed of the welding head 10, so that the pipe wall thickness at the weld seam of the stainless steel welded pipe is uniform, thereby improving the quality of the stainless steel welded pipe.

[0024] Example 2

[0025] like Figure 4As shown, the utility model proposes a welding device for a stainless steel welded pipe with uniform wall thickness. Compared with the first embodiment, this embodiment also includes a bend pipe 6 fixedly connected to the side of the outer surface of the welding cover 4 close to the conveying roller 13, and the external welding wire is introduced into between the conveying roller 13 and the pressure roller 12 through the bend pipe 6. An argon gas input pipe 5 is fixedly connected to one side of the upper surface of the welding cover 4, and the argon gas input pipe 5 is fixedly connected to a connecting pipe 9 at one end inside the welding cover 4.

[0026] In this embodiment, the argon gas in the argon gas input pipe 5 is blown toward the welding area through the connecting pipe 9 to play an anti-oxidation role during the welding process and improve the welding quality.

[0027] The above specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A welding device for stainless steel welded pipes with uniform wall thickness, comprising a roller (3) and a welding cover (4), characterized in that: A welding head (10) is fixedly installed inside the welding cover (4); rollers (3) are rotatably installed at both sides of the lower surface of the welding cover (4) through a wheel shaft (2); a conveying roller (13) is rotatably installed on one side of the welding cover (4) through a conveying shaft (15); a pressure roller (12) is rotatably installed at a position above the conveying roller (13) inside the welding cover (4); a guide tube (11) is fixedly installed at a position inside the welding cover (4) near the inner side of the conveying roller (13); the ends of the wheel shaft (2) and the conveying roller (13) are fixedly connected to a synchronous sprocket (7), and the two synchronous sprockets (7) are connected by a transmission chain (8).

2. The welding device for a stainless steel welded pipe with uniform wall thickness according to claim 1, characterized in that: A transmission protective cover (1) is fixedly mounted on one side of the front surface of the welding cover (4), and the two synchronous sprockets (7) and the transmission chain (8) are both located inside the transmission protective cover (1).

3. The welding device for a stainless steel welded pipe with uniform wall thickness according to claim 1, characterized in that: The outer surface of the conveying roller (13) is provided with anti-slip protrusions (14).

4. The welding device for a stainless steel welded pipe with uniform wall thickness according to claim 1, characterized in that: A curved pipe (6) is fixedly connected to a side of the outer surface of the welding cover (4) close to the conveying roller (13).

5. The welding device for a stainless steel welded pipe with uniform wall thickness according to claim 1, characterized in that: An argon gas input pipe (5) is fixedly connected to one side of the upper surface of the welding cover (4), and a connecting pipe (9) is fixedly connected to one end of the argon gas input pipe (5) located inside the welding cover (4).

Images