Stainless steel pipe flange welding device

Abstract

The invention belongs to the technical field of pipe welding, and particularly relates to a stainless steel pipe flange welding device which comprises a U-shaped plate, a bottom plate is arranged at the lower end of the U-shaped plate, two arc-shaped strips are arranged at the upper end of the U-shaped plate in a sliding mode, feeding devices are arranged at the two ends of the U-shaped plate correspondingly, and each feeding device comprises two first circular plates. Arc-shaped rods are slidably arranged on the peripheries of one sides of the first circular plates correspondingly, kidney-shaped strips are rotatably arranged on one sides of the two first circular plates, the kidney-shaped strips are slidably arranged on the two sides of the upper end of the bottom plate, first rectangular boxes are arranged on the opposite sides of the feeding devices correspondingly, and a second rectangular box is arranged between the first rectangular boxes; welding heads are arranged at the two ends of the side, away from the second rectangular box, of the U-shaped plate correspondingly, flanges can be automatically aligned with the two ends of the stainless steel pipe, the flanges at the two ends are welded at the same time, the welding efficiency is improved, the flanges at the two ends are welded at the same time, and the welding consistency of the flanges at the two ends can be guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of pipe welding technology, specifically a stainless steel pipe flange welding device. Background Technology

[0002] Due to usage requirements, flanges are welded to both ends of stainless steel pipes as needed. The main functions of welding flanges at both ends of stainless steel pipes are connection, sealing, and ease of maintenance. Specifically, welding flanges can firmly connect stainless steel pipes to another section of pipe, fittings, or equipment to form a complete system. By adding gaskets between the flanges and tightening them with bolts, the sealing of the connection can be ensured to prevent media leakage, which is especially suitable for high-pressure or corrosive environments.

[0003] A patent application with publication number CN217045026U discloses a stainless steel pipe welding device. By passing two stainless steel pipe sections through two sets of through holes b, each set according to the pipe dimensions to ensure coaxiality, one pipe section is first placed against a sliding plate and clamped. A telescopic device then extends the sliding plate downwards to below the pipe section. The other pipe section is then placed against the already fixed pipe section and clamped as well. This ensures the joint of the two pipe sections is directly below the laser welding head, allowing for direct welding without the need for laser line adjustments. The laser welding head welds the joint, while a power component drives a cylinder to rotate synchronously via external gears. These two cylinders then drive the two pipe sections to rotate synchronously, achieving automatic circumferential welding with high efficiency and quality.

[0004] In the aforementioned prior art, when welding flanges to both ends of a stainless steel pipe, the flanges need to be aligned with the ends of the stainless steel pipe before welding. This involves manually aligning one side of the flange with the end of the stainless steel pipe before welding, and then welding the other end of the stainless steel pipe. This process is inefficient and requires welding the two ends of the stainless steel pipe separately, which makes it impossible to fully guarantee the consistency of the welding on both flange ends of the stainless steel pipe.

[0005] Therefore, the present invention provides a stainless steel pipe flange welding device. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: A stainless steel pipe flange welding device of the present invention includes a U-shaped plate, a base plate at the lower end of the U-shaped plate, two arc-shaped strips slidably arranged at the upper end of the U-shaped plate, feeding devices at both ends of the U-shaped plate, the feeding devices including two first circular plates, arc-shaped rods slidably arranged around one side of the first circular plates, waist-shaped strips rotatably arranged on one side of the two first circular plates, the waist-shaped strips slidably arranged on both sides of the upper end of the base plate, a first rectangular box arranged on opposite sides of the feeding devices, a second rectangular box arranged between the first rectangular boxes, and welding heads arranged at both ends of the side of the U-shaped plate away from the second rectangular box.

[0008] Preferably, the first rectangular box and the second rectangular box are tilted towards the side closer to the U-shaped plate, and the side of the first rectangular box and the second rectangular box closer to the U-shaped plate is the lower end.

[0009] Preferably, a first rectangular bar is rotatably provided on one side of the waist-shaped bar via a second cylindrical rod, a rectangular tube is slidably provided at the lower end of the first rectangular bar, a first electric slide is fixedly connected to the lower end of the rectangular tube, and a first electric slide rail is provided at the upper end of the base plate corresponding to the position of the first electric slide rail, and the first electric slide is slidably provided at the upper end of the first electric slide rail.

[0010] Preferably, the first circular plate has rectangular holes at the positions corresponding to the arc-shaped rods in the middle. The arc-shaped rods are slidably disposed inside the rectangular holes via rectangular sliders. A first cylindrical rod is fixed to one side of the first circular plate and is rotatably disposed at one end of the waist-shaped strip via damping. A second circular plate is rotatably disposed on the side of the first circular plate near the waist-shaped strip. The second circular plate has arc-shaped holes at the positions corresponding to the rectangular holes in the middle. The rectangular sliders are slidably disposed inside the arc-shaped holes via the first cylindrical block.

[0011] Preferably, gears are rotatably provided at the lower ends of the first circular plates located on both sides of the U-shaped plate, and gear rings are fixedly connected to the outer sides of the second circular plates.

[0012] Preferably, a second cylindrical block is fixedly connected to both sides of the gear, and a special-shaped rod slides through the middle of the gear and the second cylindrical block respectively. One end of the special-shaped rod is fixedly connected to the output end of the motor, and the motor is fixedly connected to the upper end of the base plate through a motor mount.

[0013] Preferably, a U-shaped block is rotatably mounted on the lower end of the gear via a second cylindrical block, a second electric slide is fixedly connected to the lower end of the U-shaped block, a second electric slide rail is fixedly connected to the upper end of the base plate corresponding to the position of the second electric slide, the second electric slide is slidably mounted on the upper end of the second electric slide rail, a second rectangular block is fixedly connected to one side of the rectangular cylinder, and the second rectangular block is fixedly connected to the U-shaped block via a third cylindrical rod.

[0014] Preferably, an arc-shaped slider is provided inside the arc-shaped strip through damping sliding, a rubber pad is fixed to the end of the arc-shaped slider, a first rectangular block is fixed to one side of the arc-shaped strip, and a cylindrical strip is slidably provided in the middle of the two first rectangular blocks, the cylindrical strip being fixed to the upper end of the U-shaped plate.

[0015] Preferably, a third electric slide is fixedly connected to the lower end of the first rectangular box, and a third electric slide rail is fixedly connected to the upper end of the base plate at the position corresponding to the third electric slide. The third electric slide is slidably disposed on the upper end of the third electric slide rail.

[0016] Preferably, a second rectangular strip is fixedly connected to the lower end of the welding head, a fourth electric slide is fixedly connected to the lower end of the second rectangular strip, a fourth electric slide rail is fixedly connected to the upper end of the base plate corresponding to the position of the fourth electric slide, and the fourth electric slide is slidably disposed on the upper end of the fourth electric slide rail.

[0017] The beneficial effects of this invention are as follows: 1. The stainless steel pipe flange welding device of the present invention drives a first rectangular box to move the upper flange closer to a first circular plate until the flange on the side of the upper end of the first rectangular box close to the first circular plate is fitted onto the outside of the arc-shaped rod. Then, the first rectangular bar is driven to slide upward inside the rectangular tube. The first rectangular bar drives the waist-shaped bar to lift upward through the second cylindrical rod. The waist-shaped bar drives the flange fitted onto the outside of the arc-shaped rod to lift upward through the first circular plate. Then, the second cylindrical rod is driven to rotate on one side of the first rectangular bar. The second cylindrical rod drives the two first circular plates to rotate 180 degrees through the waist-shaped bar, exchanging the positions of the two first circular plates. This causes the arc-shaped rod with the flange fitted on the outside to rotate to the end of the stainless steel pipe, which can automatically pick up the flange and automatically splice the flange to both ends of the stainless steel pipe.

[0018] 2. The stainless steel pipe flange welding device of the present invention, by driving a gear to rotate, the gear drives a second circular plate to rotate through a gear ring. When the second circular plate rotates, it drives a first cylindrical block to slide inside an arc-shaped hole. The arc-shaped hole drives several arc-shaped rods to slide around through a rectangular slider, so that the arc-shaped rods abut against the inner wall of the stainless steel pipe and the flange, so that the flange can be aligned with the end of the stainless steel pipe. After the arc-shaped rods abut against the inner wall of the stainless steel pipe and the flange, the drive gear continues to rotate. The gear drives the first circular plate to rotate the first cylindrical rod on one side of the waist-shaped strip through the gear ring. It can simultaneously drive the flanges on both sides and the pipe in the middle to rotate and weld at the same time. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a perspective view of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram showing the position of the first rectangular box; Figure 3 This is a schematic diagram showing the position of the first circular plate; Figure 4 This is a schematic diagram showing the position of the second circular plate; Figure 5 This is a schematic diagram showing the position of the second rectangular box; Figure 6 This is a schematic diagram of an arc-shaped strip structure; Figure 7 This is a schematic diagram of the welded joint structure; In the diagram: 1. U-shaped plate; 11. Arc-shaped strip; 111. Arc-shaped slider; 112. Rubber pad; 113. First rectangular block; 12. Cylindrical strip; 2. First circular plate; 21. Arc-shaped rod; 211. Rectangular slider; 22. Rectangular hole; 23. First cylindrical rod; 24. Second circular plate; 241. Arc-shaped hole; 242. First cylindrical block; 243. Gear ring; 25. Waist-shaped strip; 251. Second cylindrical rod; 252. First rectangular strip; 253. Rectangular cylinder; 26. Second rectangular... 1. Shaped block; 261. Third cylindrical rod; 27. First electric slide table; 271. First electric slide rail; 3. Gear; 31. Second cylindrical block; 32. Irregular rod; 33. U-shaped block; 34. Motor; 35. Second electric slide table; 36. Second electric slide rail; 4. First rectangular box; 41. Third electric slide table; 42. Third electric slide rail; 5. Second rectangular box; 6. Welded head; 61. Second rectangular strip; 62. Fourth electric slide table; 63. Fourth electric slide rail; 7. Base plate. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] Example 1: As Figure 1 - Figure 7 As shown in the embodiment of the present invention, a stainless steel pipe flange welding device includes a U-shaped plate 1, a base plate 7 at the lower end of the U-shaped plate 1, two arc-shaped strips 11 slidably disposed at the upper end of the U-shaped plate 1, and feeding devices at both ends of the U-shaped plate 1. The feeding devices include two first circular plates 2, arc-shaped rods 21 slidably disposed around one side of each of the first circular plates 2, and waist-shaped strips 25 rotatably disposed on one side of each of the two first circular plates 2. The waist-shaped strips 25 are slidably disposed on both sides of the upper end of the base plate 7. A first rectangular box 4 is disposed on the opposite side of the feeding device, and a second rectangular box 5 is disposed between the first rectangular boxes 4. Welding heads 6 are disposed at both ends of the side of the U-shaped plate 1 away from the second rectangular box 5.

[0023] Specifically, when welding flanges to both ends of a stainless steel pipe, the flanges need to be aligned with the ends of the stainless steel pipe before welding. Manually aligning one side of the flange with the end of the stainless steel pipe before welding, and then welding the other end, results in low welding efficiency. Furthermore, welding the two ends of the stainless steel pipe separately cannot guarantee the consistency of the welding on both flange ends. When using this welding device, the stainless steel pipe is placed on the upper end of the arc-shaped bar 11, and then the upper arc-shaped bar 11 is driven to slide downwards. The curved strips 11 at both ends clamp the stainless steel pipe in the middle, and then drive the waist-shaped strips 25 to move towards one side of the first rectangular box 4. Several flanges are placed inside the upper end of the first rectangular box 4. The waist-shaped strips 25 on both sides drive the curved rods 21 through the first circular plate 2 on one side to insert into the middle of the flanges placed at the upper end of the first rectangular box 4. Then drive the waist-shaped strips 25 to rotate 180 degrees, rotating the curved rods 21 with flanges to the end of the stainless steel pipe. Then simultaneously drive the waist-shaped strips 25 on both sides to move closer to both ends of the stainless steel pipe. The waist-shaped strips 25 drive the curved rods 21 Inserted into the stainless steel pipe, the arc-shaped rod 21 is then driven to slide on one side of the first circular plate 2, so that several arc-shaped rods 21 are pressed tightly against the inner wall of the flange and the stainless steel pipe, so that the flange and the stainless steel pipe can be aligned. At the same time, the first circular plate 2 presses the flange, so that the flanges on both sides can be pressed tightly against the two ends of the stainless steel pipe. Then, the first circular plate 2 is driven to rotate, causing the flange and the stainless steel pipe to rotate. The welding head 6 on one side welds the connection between the flange and the stainless steel pipe. It can automatically pick up the flange and automatically align the flange with the two ends of the stainless steel pipe, and weld the flanges at both ends at the same time, improving welding efficiency. When the stainless steel pipe is rotated, the flanges at both ends are welded at the same time, which can ensure the consistency of the flange welding at both ends.

[0024] like Figure 1 As shown, the first rectangular box 4 and the second rectangular box 5 are respectively tilted towards the side closer to the U-shaped plate 1, and the side of the first rectangular box 4 and the second rectangular box 5 closer to the U-shaped plate 1 is the lower end.

[0025] like Figure 3 As shown, a first rectangular bar 252 is rotatably mounted on one side of the waist-shaped bar 25 via a second cylindrical rod 251. A rectangular tube 253 is slidably mounted on the lower end of the first rectangular bar 252. A first electric slide table 27 is fixedly connected to the lower end of the rectangular tube 253. A first electric slide rail 271 is mounted on the upper end of the base plate 7 corresponding to the position of the first electric slide table 27. The first electric slide table 27 is slidably mounted on the upper end of the first electric slide rail 271.

[0026] like Figure 4As shown, rectangular holes 22 are respectively provided in the middle of the first circular plate 2 at the position corresponding to the arc-shaped rod 21. The arc-shaped rod 21 is slidably disposed inside the rectangular holes 22 by a rectangular slider 211. A first cylindrical rod 23 is fixedly connected to one side of the first circular plate 2. The first cylindrical rod 23 is disposed at one end of the waist-shaped strip 25 by damping rotation. A second circular plate 24 is rotatably disposed on the side of the first circular plate 2 near the waist-shaped strip 25. Arc holes 241 are respectively provided in the middle of the second circular plate 24 at the position corresponding to the rectangular holes 22. The rectangular slider 211 is slidably disposed inside the arc holes 241 by a first cylindrical block 242.

[0027] like Figure 3 - Figure 4 As shown, gears 3 are rotatably mounted on the lower ends of the first circular plates 2 located on both sides of the U-shaped plate 1, and gear rings 243 are fixedly connected to the outer sides of the second circular plate 24.

[0028] like Figure 3 As shown, a second cylindrical block 31 is fixedly connected to both sides of the gear 3. A special-shaped rod 32 slides through the middle of the gear 3 and the second cylindrical block 31 respectively. One end of the special-shaped rod 32 is fixedly connected to the output end of the motor 34. The motor 34 is fixedly connected to the upper end of the base plate 7 through a motor base.

[0029] like Figure 3 As shown, a U-shaped block 33 is rotatably mounted on the lower end of the gear 3 via a second cylindrical block 31. A second electric slide table 35 is fixedly connected to the lower end of the U-shaped block 33. A second electric slide rail 36 is fixedly connected to the upper end of the base plate 7 at the position corresponding to the second electric slide table 35. The second electric slide table 35 is slidably mounted on the upper end of the second electric slide rail 36. A second rectangular block 26 is fixedly connected to one side of the rectangular cylinder 253. The second rectangular block 26 is fixedly connected to the U-shaped block 33 via a third cylindrical rod 261.

[0030] Specifically, since the ends of the first rectangular box 4 and the second rectangular box 5 closest to the U-shaped plate 1 are lower, the flanges and stainless steel pipes placed on the upper ends of the first rectangular box 4 and the second rectangular box 5 can automatically move closer to one end of the U-shaped plate 1. When the stainless steel pipe at the upper end of the second rectangular box 5 falls onto the upper end of the arc-shaped bar 11, it then drives the upper arc-shaped bar 11 to slide downwards, keeping the stainless steel pipe fixed. This drives the flange at the upper end of the first rectangular box 4 to move closer to the first circular plate 2, until the flange at the upper end of the first rectangular box 4 closest to the first circular plate 2 is fitted onto the outside of the arc-shaped bar 21. Then, the first rectangular bar 252 is driven to slide upward inside the rectangular tube 253. The first rectangular bar 252 drives the waist-shaped bar 25 to lift upward through the second cylindrical rod 251. The waist-shaped bar 25 drives the flange sleeved on the outside of the arc rod 21 to lift upward through the first circular plate 2. Then, the second cylindrical rod 251 is driven to rotate on one side of the first rectangular bar 252. The second cylindrical rod 251 drives the two first circular plates 2 to rotate 180 degrees through the waist-shaped bar 25, and the positions of the two first circular plates 2 are exchanged, so that the arc rod 21 with the flange sleeved on the outside rotates to the end of the stainless steel pipe. Subsequently, the first electric slide 27 is driven to slide on the upper end of the first electric slide rail 271. The first electric slide 27 drives the first rectangular bar 252 to move closer to the end of the stainless steel pipe via the rectangular cylinder 253. The first rectangular bar 252 drives the waist-shaped bar 25 to move closer to the end of the stainless steel pipe via the second cylindrical rod 251. The waist-shaped bar 25 drives the flange sleeved on the outer side of the arc rod 21 to move closer to the end of the stainless steel pipe until the arc rod 21 is inserted into the stainless steel pipe. The first circular plate 2 presses the flange against the end of the stainless steel pipe. When the rectangular cylinder 253 moves closer to the end of the stainless steel pipe, the rectangular cylinder 253 drives the third cylindrical rod 261 to move closer to the end of the stainless steel pipe via the second rectangular block 26. The third cylindrical rod 261 drives the second electric slide 35 to move on the upper end of the second electric slide rail 36 via the U-shaped block 33. The U-shaped block 33 drives the second electric slide 35 to move on the upper end of the second electric slide rail 36 via the second cylindrical block. 31 drives gear 3 to slide outside the irregular rod 32, so that gear 3 always follows the position of gear ring 243. Then, motor 34 is started to drive irregular rod 32 to rotate. Irregular rod 32 can drive gear 3 on both sides to rotate at the same time. Gear 3 drives second circular plate 24 to rotate through gear ring 243. When second circular plate 24 rotates, it drives first cylindrical block 242 to slide inside arc hole 241. Arc hole 241 drives several arc rods 21 to slide around through rectangular slider 211, so that arc rods 21 abut against the stainless steel pipe and flange inner wall, so that flange can be aligned with the end of stainless steel pipe. When arc rods 21 abut against stainless steel pipe and flange inner wall, drive gear 3 to continue to rotate. Gear 3 drives first circular plate 2 to drive first cylindrical rod 23 to rotate on one side of waist strip 25 through gear ring 243, which can drive flange on both sides and pipe in the middle to rotate at the same time and perform welding at the same time.

[0031] like Figure 6As shown, an arc-shaped slider 111 is provided inside the arc-shaped strip 11 by means of damping sliding. A rubber pad 112 is fixed to the end of the arc-shaped slider 111. A first rectangular block 113 is fixed to one side of the arc-shaped strip 11. A cylindrical strip 12 is slidably provided in the middle of the two first rectangular blocks 113. The cylindrical strip 12 is fixed to the upper end of the U-shaped plate 1.

[0032] Specifically, when the stainless steel pipe at the top of the second rectangular box 5 falls onto the upper end of the arc-shaped strip 11, it then drives the upper arc-shaped strip 11 to slide downwards. The arc-shaped slider 111 in the middle of the two arc-shaped strips 11 clamps the stainless steel pipe through the rubber pad 112, keeping the stainless steel pipe fixed. When the first circular plate 2 drives the flange to splice with the end of the stainless steel pipe through the arc-shaped rod 21, it then drives the flange and the stainless steel pipe to rotate. When the stainless steel pipe rotates, it drives the arc-shaped slider 111 to slide inside the arc-shaped strip 11, keeping the stainless steel pipe fixed without affecting the rotation of the stainless steel pipe.

[0033] like Figure 2 As shown, a third electric slide table 41 is fixedly connected to the lower end of the first rectangular box 4, and a third electric slide rail 42 is fixedly connected to the upper end of the base plate 7 at the position corresponding to the third electric slide table 41. The third electric slide table 41 is slidably arranged on the upper end of the third electric slide rail 42.

[0034] Specifically, by driving the third electric slide table 41 to slide on the upper end of the third electric slide rail 42, the third electric slide table 41 drives the first rectangular box 4 to slide towards the side closer to the first circular plate 2 until the flange of the upper end of the first rectangular box 4 near the first circular plate 2 is sleeved on the outside of the arc rod 21.

[0035] Example 2: Figure 7 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: a second rectangular strip 61 is fixedly connected to the lower end of the welding head 6, a fourth electric slide table 62 is fixedly connected to the lower end of the second rectangular strip 61, a fourth electric slide rail 63 is fixedly connected to the upper end of the base plate 7 corresponding to the position of the fourth electric slide table 62, and the fourth electric slide table 62 is slidably disposed on the upper end of the fourth electric slide rail 63.

[0036] Specifically, by driving the fourth electric slide table 62 to slide on the upper end of the fourth electric slide rail 63, the fourth electric slide table 62 drives the welding heads 6 on both sides to move through the second rectangular bar 61, and the position of the two welding heads 6 can be adjusted. The distance between the two welding heads 6 can be adjusted according to the stainless steel pipe of different lengths.

[0037] Working principle: Since the end of the first rectangular box 4 and the second rectangular box 5 closest to the U-shaped plate 1 is the lower end, the flange and stainless steel pipe placed on the upper end of the first rectangular box 4 and the second rectangular box 5 can automatically approach the end of the U-shaped plate 1. When the stainless steel pipe on the upper end of the second rectangular box 5 falls onto the upper end of the arc strip 11, the upper arc strip 11 is then driven to slide downward, so that the stainless steel pipe is kept fixed. By driving the third electric slide table 41 to slide on the upper end of the third electric slide rail 42, the third electric slide table 41 drives the first rectangular box 4 to slide towards the side closer to the first circular plate 2 until the flange on the upper end of the first rectangular box 4 near the first circular plate 2 is sleeved on the outside of the arc rod 21. Then, the first rectangular bar 252 is driven to slide upward inside the rectangular tube 253. The first rectangular bar 252 drives the waist-shaped bar 25 to lift upward through the second cylindrical rod 251. The waist-shaped bar 25 drives the flange sleeved on the outside of the arc rod 21 to lift upward through the first circular plate 2. Then, the second cylindrical rod 251 is driven to rotate on one side of the first rectangular bar 252. The second cylindrical rod 251 drives the two first circular plates 2 to rotate 180 degrees through the waist-shaped bar 25, and the positions of the two first circular plates 2 are exchanged, so that the arc rod 21 with the flange sleeved on the outside rotates to the end of the stainless steel pipe. Subsequently, the first electric slide 27 is driven to slide on the upper end of the first electric slide rail 271. The first electric slide 27 drives the first rectangular bar 252 to move closer to the end of the stainless steel pipe via the rectangular cylinder 253. The first rectangular bar 252 drives the waist-shaped bar 25 to move closer to the end of the stainless steel pipe via the second cylindrical rod 251. The waist-shaped bar 25 drives the flange sleeved on the outer side of the arc rod 21 to move closer to the end of the stainless steel pipe until the arc rod 21 is inserted into the stainless steel pipe. The first circular plate 2 presses the flange against the end of the stainless steel pipe. When the rectangular cylinder 253 moves closer to the end of the stainless steel pipe, the rectangular cylinder 253 drives the third cylindrical rod 261 to move closer to the end of the stainless steel pipe via the second rectangular block 26. The third cylindrical rod 261 drives the second electric slide 35 to move on the upper end of the second electric slide rail 36 via the U-shaped block 33. The U-shaped block 33 drives the second electric slide 35 to move on the upper end of the second electric slide rail 36 via the second cylindrical block. 31 drives gear 3 to slide outside the irregular rod 32, so that gear 3 always follows the position of gear ring 243. Then, motor 34 is started to drive irregular rod 32 to rotate. Irregular rod 32 can drive gear 3 on both sides to rotate at the same time. Gear 3 drives second circular plate 24 to rotate through gear ring 243. When second circular plate 24 rotates, it drives first cylindrical block 242 to slide inside arc hole 241. Arc hole 241 drives several arc rods 21 to slide around through rectangular slider 211, so that arc rods 21 abut against the stainless steel pipe and flange inner wall, so that flange can be aligned with the end of stainless steel pipe. When arc rods 21 abut against stainless steel pipe and flange inner wall, drive gear 3 to continue to rotate. Gear 3 drives first circular plate 2 to drive first cylindrical rod 23 to rotate on one side of waist strip 25 through gear ring 243, which can drive flange on both sides and pipe in the middle to rotate at the same time and perform welding at the same time.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stainless steel pipe flange welding device, comprising a U-shaped plate (1), wherein a base plate (7) is provided at the lower end of the U-shaped plate (1), and two arc-shaped strips (11) are slidably provided at the upper end of the U-shaped plate (1), and feeding devices are respectively provided at both ends of the U-shaped plate (1), characterized in that: The feeding device includes two first circular plates (2), with arc-shaped rods (21) slidably arranged around one side of each first circular plate (2), and waist-shaped strips (25) rotatably arranged on one side of each of the two first circular plates (2). The waist-shaped strips (25) are slidably arranged on both sides of the upper end of the base plate (7). A first rectangular box (4) is arranged on the opposite side of the feeding device, and a second rectangular box (5) is arranged between the first rectangular boxes (4). Welding heads (6) are arranged at both ends of the side of the U-shaped plate (1) away from the second rectangular box (5).

2. The stainless steel pipe flange welding device according to claim 1, characterized in that: The first rectangular box (4) and the second rectangular box (5) are tilted towards the side closer to the U-shaped plate (1), and the side of the first rectangular box (4) and the second rectangular box (5) closer to the U-shaped plate (1) is the lower end.

3. The stainless steel pipe flange welding device according to claim 2, characterized in that: The waist-shaped strip (25) is rotatably provided with a first rectangular strip (252) on one side via a second cylindrical rod (251). A rectangular tube (253) is slidably provided at the lower end of the first rectangular strip (252). A first electric slide table (27) is fixedly connected to the lower end of the rectangular tube (253). A first electric slide rail (271) is provided at the upper end of the base plate (7) corresponding to the position of the first electric slide table (27). The first electric slide table (27) is slidably provided at the upper end of the first electric slide rail (271).

4. The stainless steel pipe flange welding device according to claim 3, characterized in that: A rectangular hole (22) is provided in the middle of the first circular plate (2) at the position corresponding to the arc rod (21). The arc rod (21) is slidably disposed inside the rectangular hole (22) by a rectangular slider (211). A first cylindrical rod (23) is fixedly connected to one side of the first circular plate (2). The first cylindrical rod (23) is disposed at one end of the waist-shaped strip (25) by damping rotation. A second circular plate (24) is rotatably disposed on the side of the first circular plate (2) near the waist-shaped strip (25). An arc hole (241) is provided in the middle of the second circular plate (24) at the position corresponding to the rectangular hole (22). The rectangular slider (211) is slidably disposed inside the arc hole (241) by a first cylindrical block (242).

5. The stainless steel pipe flange welding device according to claim 4, characterized in that: Gears (3) are rotatably provided at the lower ends of the first circular plates (2) located on both sides of the U-shaped plate (1), and gear rings (243) are fixedly connected to the outer side of the second circular plate (24).

6. The stainless steel pipe flange welding device according to claim 5, characterized in that: The gear (3) is fixedly connected to two sides of a second cylindrical block (31). The gear (3) and the second cylindrical block (31) are respectively slidably connected to a shaped rod (32). One end of the shaped rod (32) is fixedly connected to the output end of a motor (34). The motor (34) is fixedly connected to the upper end of the base plate (7) through a motor seat.

7. A stainless steel pipe flange welding device according to claim 6, characterized in that: The lower end of the gear (3) is rotatably provided with a U-shaped block (33) via a second cylindrical block (31). The lower end of the U-shaped block (33) is fixedly connected to a second electric slide table (35). The upper end of the base plate (7) is fixedly connected to a second electric slide rail (36) corresponding to the position of the second electric slide table (35). The second electric slide table (35) is slidably disposed on the upper end of the second electric slide rail (36). A second rectangular block (26) is fixedly connected to one side of the rectangular tube (253). The second rectangular block (26) is fixedly connected to the U-shaped block (33) via a third cylindrical rod (261).

8. The stainless steel pipe flange welding device according to claim 7, characterized in that: An arc-shaped slider (111) is provided inside the arc-shaped strip (11) by means of damping sliding. A rubber pad (112) is fixed to the end of the arc-shaped slider (111). A first rectangular block (113) is fixed to one side of the arc-shaped strip (11). A cylindrical strip (12) is slidably provided in the middle of the two first rectangular blocks (113). The cylindrical strip (12) is fixed to the upper end of the U-shaped plate (1).

9. A stainless steel pipe flange welding device according to claim 8, characterized in that: The lower end of the first rectangular box (4) is fixedly connected to a third electric slide (41), and the upper end of the base plate (7) is fixedly connected to a third electric slide rail (42) at the position corresponding to the third electric slide (41). The third electric slide (41) is slidably arranged on the upper end of the third electric slide rail (42).

10. A stainless steel pipe flange welding device according to claim 9, characterized in that: The lower end of the welding head (6) is fixedly connected to a second rectangular strip (61), and the lower end of the second rectangular strip (61) is fixedly connected to a fourth electric slide table (62). The upper end of the base plate (7) is fixedly connected to a fourth electric slide rail (63) corresponding to the position of the fourth electric slide table (62). The fourth electric slide table (62) is slidably arranged on the upper end of the fourth electric slide rail (63).

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