Precise welding device for pipeline flange

Abstract

The invention belongs to the technical field of pipeline flange welding, and discloses a pipeline flange precision welding device which comprises a supporting frame, a welding gun located on the supporting frame, a moving assembly and a supporting mechanism, and further comprises a positioning mechanism and a clamping mechanism, the positioning mechanism comprises a clamping assembly and a positioning shaft, a third round rod is installed on the outer wall of the positioning shaft, and one side of the third round rod abuts against an extrusion plate; a plurality of second sliding grooves are formed in the outer wall of the extrusion plate, second round rods are slidably mounted on the inner walls of the second sliding grooves, first baffles and second baffles are mounted on the outer walls of the second round rods correspondingly, and limiting rods are mounted on the outer walls of the second round rods; and the clamping assembly comprises a second disc and a first sliding groove, a plurality of third sliding grooves are evenly formed in the outer wall of the second disc, positioning rods are slidably installed on the inner walls of the third sliding grooves and slidably installed outside the second round rod, the inner wall of the first sliding groove abuts against a round pin, and the round pin is fixedly connected with the second disc. The welding device solves the problem that the deviation between the flange and the initial position is too large due to vibration and thermal stress of an existing welding device.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline flange welding, and in particular to a pipeline flange precision welding device. Background Art

[0002] As the manufacturing industry continues to move towards intelligence and high-end, the intelligent manufacturing equipment industry is booming, and its application in various industrial fields is becoming more extensive and in-depth. Pipeline systems are key infrastructure for transporting various fluid media (such as oil, natural gas, chemical raw materials, etc.) in industrial production. The welding quality of pipelines and flanges is directly related to the safety, reliability and stability of the entire pipeline system.

[0003] At present, in the welding operation of pipes and flanges, the operation process of existing equipment is usually to manually use measuring tools such as rulers to accurately position the pipes and flanges. After completing the positioning, the technicians will evenly weld several positioning welds at the connection between the flange and the pipe to initially fix the relative position of the two. Then, the welding equipment will drive the pipe and flange to rotate, and at the same time, the welding gun will perform automatic welding operations on them.

[0004] However, during actual welding, due to the vibration generated by the operation of the machine and the inevitable thermal stress during the welding process, the flange is prone to tilt on the pipeline, causing the welded flange to deviate too much from the initial position, burying a great hidden danger to the safe operation of the entire pipeline system. In order to solve this problem, the present invention proposes a precision welding device for pipeline flanges. Summary of the invention

[0005] The object of the present invention is to provide a precision welding device for pipeline flanges, which solves the problem of excessive deviation of flanges from initial positions due to vibration and thermal stress in existing welding devices.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A pipe flange precision welding device, comprising a support frame, a welding gun, a moving assembly and a supporting mechanism located on the support frame, and also comprising: The positioning mechanism comprises a clamping assembly and a positioning shaft, wherein a third round rod is installed on the outer wall of the positioning shaft, and an extrusion plate is abutted on the side of the third round rod away from the positioning shaft, and a plurality of second sliding grooves are provided on the outer wall of the extrusion plate, and a second round rod is slidably installed on the inner wall of the second sliding groove, and a first baffle and a second baffle are respectively installed on the outer wall of the second round rod, and a limiting rod is installed on the outer wall of the second round rod; when the moving assembly drives the pipeline to move toward one side of the flange, the positioning shaft will be squeezed, and the positioning shaft drives the clamping assembly to clamp the flange in the radial direction through the third round rod, and then the extrusion plate drives the limiting rod to clamp the flange in the axial direction through the second sliding groove and the first baffle; The clamping assembly includes a second disc and a first slide groove symmetrically opened on the outer wall of a third round rod. A plurality of third slide grooves are evenly opened on the outer wall of the second disc. A positioning rod is slidably installed on the inner wall of the third slide groove. The positioning rod is slidably installed on the outside of the second round rod. A round pin is abutted against the inner wall of the first slide groove. The round pin is fixedly connected to the second disc.

[0007] Preferably, the moving assembly comprises a fixed plate, a first electric telescopic rod is mounted on an outer wall of the fixed plate, and a first disc is rotatably mounted on an output shaft of the first electric telescopic rod.

[0008] Preferably, the supporting mechanism comprises two bases, and the two bases are respectively fixedly mounted on the first disc and the positioning shaft, a second electric telescopic rod is mounted on the inner wall of the base, an output shaft of the second electric telescopic rod is fixedly mounted on the supporting disc, a first connecting rod is evenly and rotatably mounted on the outer wall of the supporting disc, a supporting plate is rotatably mounted on the side of the first connecting rod away from the supporting disc, a second connecting rod is rotatably mounted on the side of the supporting plate away from the first connecting rod, the second connecting rod is rotatably mounted on the base on the side away from the supporting plate, and the second connecting rod and the first connecting rod are rotatably connected.

[0009] Preferably, the lower end surface of the pipe is symmetrically abutted against a plurality of support wheels, a first round rod is slidably mounted on the inner wall of the support wheel, fixing rods are rotatably mounted at both ends of the first round rod, and the lower end surface of the fixing rod is fixedly mounted on the support frame.

[0010] Preferably, a turntable is rotatably mounted on the outer wall of the second disk, the interior of the turntable is in a cavity state, a fixing frame is rotatably mounted on the outer wall of the turntable, and the lower end surface of the fixing frame is mounted on the support frame.

[0011] Preferably, a support rod is installed on the outer wall of the welding gun, and the support rod is installed on the fixing frame at a side away from the welding gun.

[0012] Preferably, a fixing bracket is installed on the inner wall of the fixing frame, a servo motor is installed on the outer wall of the fixing bracket, and an output shaft of the servo motor passes through the fixing bracket and is fixedly connected to the turntable.

[0013] Preferably, a spring telescopic rod is installed on the inner wall of the turntable, and the spring telescopic rod abuts against the extrusion plate on the side away from the turntable.

[0014] Preferably, the outer wall of the turntable is provided with a plurality of grooves, the inner walls of the grooves are slidably provided with sliders, and the sliders are fixedly installed on the outside of the positioning rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a clamping assembly. When the pipeline moves toward one side of the flange, the positioning shaft is squeezed. At this time, the positioning shaft drives the third round rod to move. The first sliding groove on the outer wall of the third round rod begins to squeeze the round pin. The round pin drives the second disc to rotate. The second disc squeezes the positioning rod through the third sliding groove. When the positioning rod is clamped on the outer wall of the flange, it is radially clamped. At this time, it can be ensured that the flange is consistent with the axis of the pipeline, and the gap between the inner wall of the flange and the outer wall of the pipeline is equal, thereby ensuring the accuracy of welding.

[0016] 2. The present invention sets a limit rod. When the extrusion plate is squeezed by the third round rod, the extrusion plate first drives the second slide groove to slide on the second round rod. When the positioning rod completes the radial clamping of the flange, the extrusion plate abuts against the first baffle plate. The first baffle plate drives the limit rod to move through the second round rod. The limit rod squeezes the flange to make it close to the outer wall of the turntable. At this time, the axial clamping of the flange is completed, which can reduce the deviation between the flange and the pipeline caused by machine vibration and thermal stress during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Schematic diagram from another perspective; Figure 3 It is a cross-sectional view of the present invention; Figure 4 for Figure 3 The enlarged schematic diagram of point A in the middle; Figure 5 for Figure 3 The enlarged schematic diagram of point B in the middle; Figure 6 This is a schematic diagram of the interior of the turntable of the present invention; Figure 7 for Figure 6 Explosion diagram.

[0018] In the figure: 1. fixed frame; 2. support frame; 3. support rod; 4. welding gun; 5. flange; 6. pipeline; 7. first round rod; 8. support wheel; 9. fixed rod; 10. first disc; 11. first electric telescopic rod; 12. fixed plate; 13. servo motor; 14. fixed frame; 15. turntable; 16. spring telescopic rod; 17. extrusion plate; 18. first baffle plate; 19. second round rod; 20. second baffle plate; 21. second disc; 22. positioning rod; 23. limit rod; 24. positioning shaft; 25. third round rod; 26. first slide groove; 27. round pin; 28. support disc; 29. ​​support plate; 30. first connecting rod; 31. second connecting rod; 32. base; 33. second electric telescopic rod; 34. second slide groove; 35. third slide groove; 36. slider. DETAILED DESCRIPTION

[0019] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0020] See also Figures 1 to 7 The present invention provides a technical solution: a pipe flange precision welding device, comprising a support frame 2, a welding gun 4, a moving assembly and a supporting mechanism located on the support frame 2, and also comprising: The positioning mechanism includes a clamping assembly and a positioning shaft 24. A third round rod 25 is installed on the outer wall of the positioning shaft 24. The third round rod 25 is abutted against an extrusion plate 17 on the side away from the positioning shaft 24. A plurality of second slide grooves 34 are provided on the outer wall of the extrusion plate 17. A second round rod 19 is slidably installed on the inner wall of the second slide groove 34. The first baffle 18 and the second baffle 20 are respectively installed on the outer wall of the second round rod 19. A limiting rod 23 is installed on the outer wall of the second round rod 19. When the moving assembly drives the pipeline 6 to move toward the side of the flange 5, the positioning shaft 24 will be squeezed. The positioning shaft 24 drives the clamping assembly to clamp the flange 5 in the radial direction through the third round rod 25, and then the extrusion plate 17 drives the limiting rod 23 to clamp the flange 5 in the axial direction through the second slide groove 34 and the first baffle 18. The clamping assembly includes a second disc 21 and a first slide groove 26 symmetrically opened on the outer wall of the third round rod 25. A plurality of third slide grooves 35 are evenly opened on the outer wall of the second disc 21. A positioning rod 22 is slidably installed on the inner wall of the third slide groove 35. The positioning rod 22 is slidably installed on the outside of the second round rod 19. A round pin 27 is abutted against the inner wall of the first slide groove 26, and the round pin 27 is fixedly connected to the second disc 21.

[0021] Further, such as Figure 1 As shown, the moving assembly includes a fixed plate 12, a first electric telescopic rod 11 is installed on the outer wall of the fixed plate 12, and a first disc 10 is rotatably installed on the output shaft of the first electric telescopic rod 11; The first electric telescopic rod 11 drives the first disc 10 to move when it works, and the first disc 10 drives the pipeline 6 to move through the support plate 29 .

[0022] Further, such as Figures 3 to 5As shown, the support mechanism includes two bases 32, the two bases 32 are fixedly mounted on the first disc 10 and the positioning shaft 24 respectively, a second electric telescopic rod 33 is mounted on the inner wall of the base 32, a support disc 28 is fixedly mounted on the output shaft of the second electric telescopic rod 33, a first connecting rod 30 is evenly rotatably mounted on the outer wall of the support disc 28, a support plate 29 is rotatably mounted on the side of the first connecting rod 30 away from the support disc 28, a second connecting rod 31 is rotatably mounted on the side of the support plate 29 away from the first connecting rod 30, a side of the second connecting rod 31 away from the support plate 29 is rotatably mounted on the base 32, and the second connecting rod 31 is rotatably connected to the first connecting rod 30; When the second electric telescopic rod 33 moves, it drives the support plate 28 to move, and the support plate 28 drives the first connecting rod 30 to move. The first connecting rod 30 rotates around the rotation connection with the second connecting rod 31 as a rotating axis, driving the support plate 29 to tighten or expand.

[0023] Further, such as Figure 1 and Figure 2 As shown, the lower end surface of the pipe 6 is symmetrically abutted with a plurality of support wheels 8, the inner wall of the support wheel 8 is slidably mounted with a first round rod 7, both ends of the first round rod 7 are rotatably mounted with fixed rods 9, and the lower end surface of the fixed rod 9 is fixedly mounted on the support frame 2; The supporting wheel 8 supports the pipeline 6 , and when the pipeline 6 moves, the supporting wheel 8 can slide on the first round rod 7 .

[0024] Further, such as Figure 3 and Figure 4 As shown, a turntable 15 is rotatably mounted on the outer wall of the second disk 21 , the interior of the turntable 15 is in a cavity state, and a fixing frame 1 is rotatably mounted on the outer wall of the turntable 15 , and the lower end surface of the fixing frame 1 is mounted on the support frame 2 .

[0025] Further, such as Figure 1 As shown, a support rod 3 is installed on the outer wall of the welding gun 4, and the support rod 3 is installed on the fixing frame 1 away from the welding gun 4; The support rod 3 adjusts the position of the welding gun 4 .

[0026] Further, such as Figure 4 As shown, a fixing frame 14 is installed on the inner wall of the fixing frame 1, a servo motor 13 is installed on the outer wall of the fixing frame 14, and the output shaft of the servo motor 13 passes through the fixing frame 14 and is fixedly connected to the turntable 15; The servo motor 13 can drive the turntable 15 to rotate.

[0027] Further, such as Figure 4 and Figure 5 As shown, a spring telescopic rod 16 is installed on the inner wall of the rotating disk 15, and the spring telescopic rod 16 abuts against the extrusion plate 17 on the side away from the rotating disk 15; The spring telescopic rod 16 is reset to push the extrusion plate 17 to move away from the servo motor 13. The extrusion plate 17 pushes the third round rod 25 back to the initial position. The first slide groove 26 on the third round rod 25 squeezes the round pin 27 to make the second disc 21 rotate in the opposite direction. At this time, the positioning rod 22 no longer clamps the flange 5. When the extrusion plate 17 squeezes the second baffle plate 20 , the second baffle plate 20 drives the second round rod 19 to move, and the second round rod 19 drives the limiting rod 23 to move, the flange 5.

[0028] Further, such as Figure 1 As shown, the outer wall of the rotating disk 15 is provided with a plurality of grooves, and a slider 36 is slidably mounted on the inner wall of the groove, and the slider 36 is fixedly mounted on the outside of the positioning rod 22; When the positioning rod 22 slides in the third sliding groove 35 , it drives the sliding block 36 to slide in the groove, and at the same time the sliding block 36 can prevent the positioning rod 22 from rotating.

[0029] Further, such as Figure 4 and Figure 7 As shown, the positioning shaft 24 is slidably connected to the rotating disk 15; When the turntable 15 rotates, the positioning shaft 24 and the flange 5 are driven to rotate, and the positioning shaft 24 drives the pipeline 6 to rotate through the support plate 29 .

[0030] Working principle: Step 1: First, place the pipe 6 above the support wheel 8, and sleeve the flange 5 on the outside of the positioning shaft 24, and then control the first electric telescopic rod 11 to extend, and the first electric telescopic rod 11 drives the first disc 10 to extend. At this time, the support plate 29 is inserted into the pipe 6, and then the second electric telescopic rod 33 is controlled to shrink, and the second electric telescopic rod 33 drives the support plate 28 to shrink. The support plate 28 will squeeze the first connecting rod 30, and the first connecting rod 30 squeezes the support plate 29 outward, and at this time, the second connecting rod 31 rotates with the rotating connection with the first connecting rod 30 as the rotating axis, so that the support plate 29 is completely in contact with the inner wall of the pipe 6.

[0031] Step 2: When the support plate 29 abuts against the inner wall of the pipe 6, the first electric telescopic rod 11 continues to extend, and the first disc 10 pushes the pipe 6 to move. At this time, the pipe 6 drives the support wheel 8 to move on the first round rod 7. When the pipe 6 abuts against the positioning shaft 24, the support plate 29 on the positioning shaft 24 is controlled to open and also abut against the inner wall of the pipe 6. At this time, the pipe 6 completes the support. As the first electric telescopic rod 11 continues to extend, the pipe 6 begins to squeeze the positioning shaft 24, and the positioning shaft 24 moves into the turntable 15. At this time, the positioning shaft 24 drives the third round rod 2 5 moves, the first slide groove 26 on the outer wall of the third round rod 25 starts to squeeze the round pin 27, the round pin 27 drives the second disc 21 to rotate, the second disc 21 squeezes the positioning rod 22 through the third slide groove 35, the positioning rod 22 drives the slider 36 and the limit rod 23 to descend, when the positioning rod 22 is clamped on the outer wall of the flange 5, it is clamped radially, at this time, the flange 5 is consistent with the axis of the pipeline 6, and the gap between the inner wall of the flange 5 and the outer wall of the pipeline 6 is equal, and at the same time, the direction of the first slide groove 26 is changed to be consistent with the axial direction of the third round rod 25, and the second disc 21 no longer rotates.

[0032] Step 3: When the third round rod 25 moves, it will squeeze the squeezing plate 17, and the squeezing plate 17 will squeeze the spring telescopic rod 16. The squeezing plate 17 will drive the second slide groove 34 to slide on the second round rod 19. When the positioning rod 22 is clamped on the outer wall of the flange 5, the squeezing plate 17 will abut against the first baffle 18, and the limiting rod 23 will be driven to move by the second round rod 19. The limiting rod 23 squeezes the flange 5 to make it close to the outer wall of the turntable 15 and clamp it axially. At this time, the radial and axial clamping of the flange is completed, which can reduce the impact of subsequent machine vibration and thermal stress.

[0033] Step 4: When the limiting rod 23 makes the flange 5 close to the outer wall of the turntable 15, the position of the welding gun 4 is adjusted, and then the servo motor 13 is controlled to rotate, the servo motor 13 drives the turntable 15 to rotate, and the turntable 15 drives the pipe 6 and the flange 5 to rotate, and the welding gun 4 performs welding.

[0034] In this article, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipe flange precision welding device, comprising a support frame (2), a welding gun (4), a moving assembly and a supporting mechanism located on the support frame (2), characterized in that: Also includes: The positioning mechanism comprises a clamping assembly and a positioning shaft (24); a third round rod (25) is installed on the outer wall of the positioning shaft (24); a side of the third round rod (25) away from the positioning shaft (24) is abutted against an extrusion plate (17); a plurality of second sliding grooves (34) are provided on the outer wall of the extrusion plate (17); a second round rod (19) is slidably installed on the inner wall of the second sliding groove (34); a first baffle plate (18) and a second baffle plate (20) are respectively installed on the outer wall of the second round rod (19); and a limiting rod (23) is installed on the outer wall of the second round rod (19); when the moving assembly drives the pipeline (6) to move toward the flange (5), the positioning shaft (24) is squeezed, and the positioning shaft (24) drives the clamping assembly to clamp the flange (5) in the radial direction through the third round rod (25); and then the extrusion plate (17) drives the limiting rod (23) to clamp the flange (5) in the axial direction through the second sliding groove (34) and the first baffle plate (18); The clamping assembly comprises a second disc (21) and a first slide groove (26) symmetrically opened on the outer wall of a third round rod (25); a plurality of third slide grooves (35) are evenly opened on the outer wall of the second disc (21); a positioning rod (22) is slidably installed on the inner wall of the third slide groove (35); the positioning rod (22) is slidably installed on the outside of the second round rod (19); a round pin (27) is abutted against the inner wall of the first slide groove (26); and the round pin (27) is fixedly connected to the second disc (21).

2. A pipe flange precision welding device according to claim 1, characterized in that: The moving assembly comprises a fixed plate (12), a first electric telescopic rod (11) being mounted on an outer wall of the fixed plate (12), and a first disc (10) being rotatably mounted on an output shaft of the first electric telescopic rod (11).

3. A pipe flange precision welding device according to claim 2, characterized in that: The support mechanism comprises two bases (32), the two bases (32) being fixedly mounted on the first disc (10) and the positioning shaft (24) respectively; a second electric telescopic rod (33) is mounted on the inner wall of the base (32); an output shaft of the second electric telescopic rod (33) is fixedly mounted on a support disc (28); a first connecting rod (30) is evenly rotatably mounted on the outer wall of the support disc (28); a supporting plate (29) is rotatably mounted on the side of the first connecting rod (30) away from the support disc (28); a second connecting rod (31) is rotatably mounted on the side of the support plate (29) away from the first connecting rod (30); a side of the second connecting rod (31) away from the support plate (29) is rotatably mounted on the base (32); and the second connecting rod (31) and the first connecting rod (30) are rotatably connected.

4. The pipe flange precision welding device according to claim 1, characterized in that: The lower end surface of the pipe (6) is symmetrically abutted against a plurality of support wheels (8), a first round rod (7) is slidably mounted on the inner wall of the support wheel (8), fixed rods (9) are rotatably mounted at both ends of the first round rod (7), and the lower end surface of the fixed rod (9) is fixedly mounted on the support frame (2).

5. The pipe flange precision welding device according to claim 1 is characterized in that: A rotating disk (15) is rotatably mounted on the outer wall of the second disk (21); the interior of the rotating disk (15) is in a hollow state; a fixing frame (1) is rotatably mounted on the outer wall of the rotating disk (15); the lower end surface of the fixing frame (1) is mounted on the support frame (2).

6. A pipe flange precision welding device according to claim 5, characterized in that: A support rod (3) is mounted on the outer wall of the welding gun (4), and the support rod (3) is mounted on the fixed frame (1) at a side away from the welding gun (4).

7. The pipe flange precision welding device according to claim 5, characterized in that: A fixing frame (14) is mounted on the inner wall of the fixing frame (1), a servo motor (13) is mounted on the outer wall of the fixing frame (14), and an output shaft of the servo motor (13) passes through the fixing frame (14) and is fixedly connected to the rotating disk (15).

8. The pipe flange precision welding device according to claim 5, characterized in that: A spring telescopic rod (16) is installed on the inner wall of the rotating disk (15), and the spring telescopic rod (16) abuts against the extrusion plate (17) on the side away from the rotating disk (15).

9. The pipe flange precision welding device according to claim 5, characterized in that: The outer wall of the rotating disk (15) is provided with a plurality of grooves, and a slider (36) is slidably mounted on the inner wall of the groove. The slider (36) is fixedly mounted on the outside of the positioning rod (22).

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