A pipe welding apparatus for self-positioning butt welding of a pipe

Abstract

The application belongs to the technical field of welding, and particularly relates to a pipe welding device for butt welding of self-positioning pipes. The following scheme is proposed and comprises a welding table, a butt joint mechanism, two top fixing mechanisms and a welding mechanism. The butt joint mechanism is fixed on the welding table, the two top fixing mechanisms are arranged on the two sides of the butt joint mechanism, the welding mechanism is fixed on the top of the welding table, and the top of the welding table is provided with a side edge fixing mechanism. The side edge fixing mechanism comprises a transmission assembly, a support frame, a rotary table, a guide rod, a push plate, a support plate, a side edge support seat and a side edge butt joint plate. One end of the support frame is fixed on the side edge of the butt joint mechanism, and the rotary table is rotationally connected in the support frame. The application can effectively improve the butt joint effect of the pipes, so as to facilitate the welding of the two pipes, prevent the misalignment of the two pipes during butt joint due to the poor fixing effect of the pipes, and thus affect the welding of the pipes.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of welding, in particular to a welding pipe welding equipment for self-positioning butt welding pipe. BACKGROUND

[0002] Pipes are commonly used for transporting gas, liquid and the like, including such as water supply, drainage, heating, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering and many other fields, and in order to achieve long-distance transportation, a certain length of pipe body is usually welded to achieve the transportation task of long pipe body.

[0003] According to the search, the Chinese patent application with the application publication number CN118180689A discloses a welding pipe welding equipment for self-positioning butt welding pipe, which comprises a pair of collinearly arranged conveying tables and welding machine arms for conveying welding pipes for butt joint; each conveying table is provided with a positioning mechanism, and the welding machine arm is provided with a welding gun capable of multi-axis adjustment and used for welding the butt joint welding pipes; the positioning mechanism comprises a first guide pipe and a second guide pipe, wherein the initial position of each receiving block in the first guide pipe is used as the initial coordinate, and the receiving block can move radially under stress during the transportation of the welding pipe, so as to obtain the offset amount during the entire transportation process of the welding pipe, so as to obtain the parameters for adjusting the second guide pipe and the extrusion block, so that the welding pipe can be adjusted to the preset initial coordinate, and the butt joint operation can be realized by adjusting the two welding pipes to the corresponding coordinates.

[0004] The existing equipment needs to butt joint the welded welding pipes in order to improve the welding effect during the welding process of the welding pipes, but the welding pipes often shake due to poor fixing effect during the butt joint process, thereby causing errors in the welding of the two welding pipes. SUMMARY

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A welding pipe welding equipment for self-positioning butt welding pipe, comprising a welding table, a butt joint mechanism, two top fixing mechanisms and a welding mechanism, the butt joint mechanism is fixed on the welding table, the two top fixing mechanisms are arranged on the two sides of the butt joint mechanism, the welding mechanism is fixed on the top of the welding table, and the top of the welding table is provided with a side fixing mechanism;

[0007] The side fixing mechanism comprises a transmission assembly, a support frame, a rotary table, a guide rod, a push plate, a support plate, a side support base and a side butt joint plate, one end of the support frame is fixed at the side of the butt joint mechanism, the rotary table is rotationally connected inside the support frame, a spiral groove is formed in the circumferential outer wall of the rotary table, one end of the guide rod is located inside the spiral groove and the other end is fixed on the push plate, the push plate is fixedly connected with the support plate, an elastic pad is fixed between the support plate and the side butt joint plate, the side support base is fixed on the top fixing mechanism, guide grooves are formed on both sides of the support frame, a connecting rod is slidably connected inside the two guide grooves, one end of the connecting rod is fixedly connected with the support plate;

[0008] The top fixing mechanism and the side fixing mechanism are connected through the transmission assembly.

[0009] Preferably, the butt joint mechanism comprises a butt joint base, two moving plates, a double-headed screw rod and a butt joint motor, the butt joint base is fixed on the welding table, notches are formed on both sides of the top of the butt joint base, the notches are rotationally connected with the double-headed screw rod, one side of the butt joint base is fixedly connected with the butt joint motor, the output end of the butt joint motor is fixedly connected with the double-headed screw rod, the screw threads on both sides of the double-headed screw rod are opposite in direction, the two moving plates are slidably connected inside the two notches, a threaded hole matched with the double-headed screw rod is formed through one side of each moving plate, and the threaded hole is threadedly connected with the double-headed screw rod.

[0010] Preferably, the top fixing mechanism comprises two supports, two fixing bases and two clamping plates, the two supports are symmetrically fixed on the top of the moving plate, the fixing base is fixed on the support, a connecting plate is fixed between both sides of the fixing base, a clamping plate spring is arranged between the clamping plate and the connecting plate, a threaded hole is formed through the top of the connecting plate, a fixing bolt is threadedly connected with the inner wall of the threaded hole, the bottom of the fixing bolt acts on the clamping plate, and the side support base is arranged between the two fixing bases.

[0011] Preferably, a positioning hole is formed through one side of each notch, and a positioning plate is slidably connected with the inner wall of each positioning hole.

[0012] Preferably, the transmission assembly comprises a rack, a support table, a rotating rod, a gear, two bevel gears, two belt pulleys, a belt and a shaft rod, the rack is fixed on one side of the positioning plate, the support table is fixed on the welding table, the rotating rod is rotationally connected with the support table, the gear is sleeved on the rotating rod, one of the two bevel gears is sleeved on the rotating rod, one side of the butt joint base is rotationally connected with a rotating shaft, the other bevel gear is sleeved on the rotating shaft, the two bevel gears are engaged, the two belt pulleys are respectively sleeved on the rotating shaft and the shaft rod, the two belt pulleys are rotationally connected with the belt, and one end of the shaft rod is fixed on the rotary table.

[0013] Preferably, the welding mechanism is composed of a welding frame and a welding gun, the welding gun is detachably mounted on the welding frame, and the welding gun is located above the docking mechanism.

[0014] Preferably, one side of the side docking plate is provided with a deviation prevention mechanism, and the deviation prevention mechanism cooperates with the side fixing mechanism.

[0015] Preferably, the deviation prevention mechanism comprises a push rod, a pressing plate and a deviation prevention plate, a through hole is formed through one side of the side docking plate, the pressing plate is slidingly connected inside the through hole, the pressing plate and one side of the through hole are provided with a return spring, the push rod is slidingly connected at the other end of the through hole, a push rod spring is arranged between the push rod and the through hole, and the deviation prevention plate is fixed at the bottom of the push rod.

[0016] Preferably, the deviation prevention plate is made of elastic material.

[0017] The beneficial effects of the present application are:

[0018] 1. The docking mechanism, the top fixing mechanism and the side fixing mechanism are arranged, two welding pipes are fixed on the two top fixing mechanisms during the welding process of the butt welding pipe, the docking mechanism is started after the fixing is completed, the docking mechanism drives the two top fixing mechanisms to move, thereby the two welding pipes are docked, the top fixing mechanism drives the positioning plate and the rack to move during the movement, the rack is engaged with the gear during the movement, the gear drives the rotating rod to rotate synchronously during the engagement, the rotating rod drives one of the bevel gears to rotate during the rotation, the other bevel gear drives the rotating shaft to rotate through the engagement between the two bevel gears, the rotating shaft drives one of the pulleys to rotate during the rotation, the shaft drives the rotating table to rotate through the cooperation between the two pulleys and the belt, at this time, the guide rod drives the side docking plate and the side docking plate to move under the guidance of the spiral groove, when the two welding pipes are docked, the side docking plate corresponds to the position of the side supporting seat, and the side docking plate acts on the welding pipe, thereby fixing the side of the welding pipe, thereby the cooperation between the top fixing mechanism and the side fixing mechanism can effectively improve the docking effect of the welding pipe, thereby facilitating the welding process of the two welding pipes, preventing the misalignment of the two welding pipes during docking due to poor fixing effect of the welding pipe, and affecting the welding of the welding pipe.

[0019] 2. This invention, through the provision of a side fixing mechanism and an anti-deviation mechanism, ensures that when the side of the welded pipe is fixed by the side fixing mechanism, the side mating plate adheres to the side support seat. At this time, the side support seat presses one side of the side mating plate, and the pressing plate is compressed into the interior of the opening under pressure. This increases the air pressure inside the opening, and the push rod moves the anti-deviation plate downward under the air pressure. The anti-deviation plate acts on the top of the welded pipe. Since the two sides of the anti-deviation plate are made of elastic material, the anti-deviation plate can cover the welded pipe according to its curvature, increasing the contact area between the anti-deviation plate and the welded pipe. This improves the fixing effect of the side fixing mechanism and the anti-deviation mechanism on the welded pipe, facilitating welding of the pipe. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a self-positioning butt welding pipe welding equipment proposed in this invention;

[0021] Figure 2 This is a schematic diagram of the docking mechanism structure of a self-positioning butt welding pipe welding equipment proposed in this invention;

[0022] Figure 3 This is a schematic diagram of the top fixing mechanism of a welding equipment for self-positioning butt welding pipes proposed in this invention.

[0023] Figure 4 This is a schematic diagram of the side fixing mechanism and transmission assembly of a self-positioning butt welded pipe welding equipment proposed in this invention.

[0024] Figure 5 This is a schematic diagram of the side fixing mechanism of a welding equipment for self-positioning butt welded pipes proposed in this invention.

[0025] Figure 6 This is a partial structural schematic diagram of a welding equipment for self-positioning butt welded pipes proposed in this invention.

[0026] Figure 7 This is a schematic diagram of the anti-deviation mechanism structure of a self-positioning butt welded pipe welding equipment proposed in this invention.

[0027] In the attached diagram: 1. Welding station; 2. Butt joint seat; 3. Top fixing mechanism; 4. Welding frame; 5. Side fixing mechanism; 6. Side support seat; 7. Welding torch; 8. Moving plate; 9. Support; 10. Groove; 11. Double-ended screw; 12. Positioning port; 13. Butt joint motor; 14. Fixing seat; 15. Connecting plate; 16. Fixing bolt; 17. Clamping spring; 18. Clamping plate; 19. Transmission assembly; 20. Positioning plate; 21. Rack; 22. 23. Support platform; 24. Rotating rod; 25. Gear; 26. Bevel gear; 27. Rotating shaft; 28. Pulley; 29. ​​Belt; 30. Anti-deviation mechanism; 31. Shaft; 32. Support frame; 33. Turntable; 34. Guide groove; 35. Connecting rod; 36. Guide rod; 37. Push plate; 38. Support plate; 39. Elastic pad; 40. Side connecting plate; 41. Spiral groove; 42. Through port; 43. Extrusion plate; 44. Push rod; 45. Anti-deviation plate. Detailed Implementation

[0028] Example 1, referring to Figures 1-6 A self-positioning butt welding pipe welding equipment includes a welding station 1, a butt welding mechanism, two top fixing mechanisms 3 and a welding mechanism. The butt welding mechanism is fixed on the welding station 1. The two top fixing mechanisms 3 are arranged on both sides of the butt welding mechanism to fix and constrain the top of the welded pipe. The welding mechanism is fixed on the top of the welding station 1. The top of the welding station 1 is provided with a side fixing mechanism 5.

[0029] The side fixing mechanism 5 includes a transmission assembly 19, a support frame 31, a turntable 32, a guide rod 35, a push plate 36, a support plate 37, a side support seat 6, and a side docking plate 39. One end of the support frame 31 is fixed to the side of the docking mechanism. The turntable 32 is rotatably connected to the inside of the support frame 31. A spiral groove 40 is provided on the outer circumference of the turntable 32. One end of the guide rod 35 is located inside the spiral groove 40, and the other end is fixed to the push plate 36. The push plate 36 is fixedly connected to the support plate 37. An elastic pad 38 is fixed between the support plate 37 and the side docking plate 39. The side support seat 6 is fixed to the top fixing mechanism 3. Guide grooves 33 are provided on both sides of the support frame 31. A connecting rod 34 is slidably connected inside the two guide grooves 33. One end of the connecting rod 34 is fixedly connected to the support plate 37.

[0030] The working process of the side fixing mechanism 5: When welding the pipes, the two pipes are fixed on the two top fixing mechanisms 3. After fixing, the docking mechanism is started. The docking mechanism will drive the two top fixing mechanisms 3 to move, thereby docking the two pipes. During the movement, the top fixing mechanism 3 will drive the transmission component 19 to rotate. When the transmission component 19 rotates, the shaft 30 will drive the turntable 32 to rotate. At this time, the guide rod 35 will drive the support plate 37 and the side docking plate 39 to move under the guidance of the spiral groove 40. After the docking between the two pipes is completed, the side docking plate 39 corresponds to the position of the side support seat 6. At the same time, the side docking plate 39 will act on the pipe.

[0031] The top fixing mechanism 3 and the side fixing mechanism 5 are connected by a transmission assembly 19.

[0032] refer to Figure 2 The docking mechanism includes a docking seat 2, two movable plates 8, a double-ended screw 11, and a docking motor 13. The docking seat 2 is fixed on the welding station 1. The top of the docking seat 2 has slots 10 on both sides. The two slots 10 are rotatably connected to the double-ended screw 11. One side of the docking seat 2 is fixedly connected to the docking motor 13. The output end of the docking motor 13 is fixedly connected to the double-ended screw 11. The threads on both sides of the double-ended screw 11 are in opposite directions. The two movable plates 8 are slidably connected inside the two slots 10. One side of the two movable plates 8 has a threaded hole that is adapted to the double-ended screw 11. The threaded hole is threadedly connected to the double-ended screw 11.

[0033] Working process of the docking mechanism: Start the docking motor 13, which will drive the double-headed screw 11 to rotate. While the double-headed screw 11 is rotating, it will drive the two moving plates 8 to move, thereby docking the two welded pipes.

[0034] refer to Figure 3 The top fixing mechanism 3 includes two supports 9, two fixed seats 14 and two clamping plates 18. The two supports 9 are symmetrically fixed on the top of the movable plate 8. The fixed seats 14 are fixed on the supports 9. A connecting plate 15 is fixed between the two sides of the fixed seat 14. A clamping plate spring 17 is provided between the clamping plate 18 and the connecting plate 15. A threaded opening is provided through the top of the connecting plate 15. A fixing bolt 16 is threadedly connected to the inner wall of the threaded opening. The bottom of the fixing bolt 16 acts on the clamping plate 18. The side support 6 is provided between the two fixed seats 14.

[0035] The working process of the top fixing mechanism 3: The welded pipe is placed on the two fixing seats 14, and the fixing bolt 16 is turned. The fixing bolt 16 will drive the clamping plate 18 to move downward, thereby clamping and fixing the top of the welded pipe through the clamping plate 18, so that the positions of the two welded pipes correspond.

[0036] Specifically, in order to improve the stability of the docking mechanism and the docking effect of the welded pipe, a positioning port 12 is provided through one side of each of the two slots 10, and a positioning plate 20 is slidably connected to the inner wall of the two positioning ports 12.

[0037] refer to Figure 4 and Figure 5 The transmission assembly 19 includes a rack 21, a support platform 22, a rotating rod 23, a gear 24, two bevel gears 25, two pulleys 27, a belt 28, and a shaft 30. The rack 21 is fixed to one side of the positioning plate 20, the support platform 22 is fixed to the welding station 1, the rotating rod 23 is rotatably connected to the support platform 22, the gear 24 is sleeved on the rotating rod 23, one of the bevel gears 25 is sleeved on the rotating rod 23, a rotating shaft 26 is rotatably connected to one side of the mating seat 2, another bevel gear 25 is sleeved on the rotating shaft 26, the two bevel gears 25 mesh with each other, two pulleys 27 are respectively sleeved on the rotating shaft 26 and the shaft 30, the two pulleys 27 are rotatably connected to the belt 28, and one end of the shaft 30 is fixed to the turntable 32.

[0038] The working process of the transmission assembly 19 is as follows: During the movement of the top fixing mechanism 3, the positioning plate 20 and the rack 21 will move. During the movement of the rack 21, it will mesh with the gear 24. During the meshing of the gear 24, it will drive the rotating rod 23 to rotate synchronously. When the rotating rod 23 rotates, it will drive one of the bevel gears 25 to rotate. Through the meshing between the two bevel gears 25, the other bevel gear 25 will drive the rotating shaft 26 to rotate. When the rotating shaft 26 rotates, it will drive one of the pulleys 27 to rotate. Through the cooperation between the two pulleys 27 and the belt 28, the shaft 30 will drive the turntable 32 to rotate.

[0039] refer to Figure 1 and Figure 2 The welding mechanism consists of a welding frame 4 and a welding torch 7. The welding torch 7 is detachably mounted on the welding frame 4 and is located above the docking mechanism.

[0040] Example 2, refer to Figures 1-7 A self-positioning butt welding pipe welding equipment, compared with Embodiment 1, has an anti-deviation mechanism 29 provided on one side of the side butt plate 39, and the anti-deviation mechanism 29 cooperates with the side fixing mechanism 5.

[0041] refer to Figure 7The anti-deviation mechanism 29 includes a push rod 43, a pressing plate 42, and an anti-deviation plate 44. A through-hole 41 is provided on one side of the side connecting plate 39. The pressing plate 42 is slidably connected inside the through-hole 41. A return spring is provided on one side of the pressing plate 42 and the through-hole 41. The push rod 43 is slidably connected to the other end of the through-hole 41. A push rod spring is provided between the push rod 43 and the through-hole 41. The anti-deviation plate 44 is fixed to the bottom of the push rod 43. Both sides of the anti-deviation plate 44 are made of elastic material.

[0042] The working process of the anti-deviation mechanism 29: When the side of the welded pipe is fixed by the side fixing mechanism 5, the side mating plate 39 will be attached to the side support seat 6. At this time, the side support seat 6 will squeeze one side of the side mating plate 39, and the squeezing plate 42 will be compressed into the inside of the opening 41 under the pressure. At this time, the air pressure inside the opening 41 will increase, and the push rod 43 will drive the anti-deviation plate 44 to move downward under the air pressure. The anti-deviation plate 44 will act on the top of the welded pipe. Since the two sides of the anti-deviation plate 44 are made of elastic material, the anti-deviation plate 44 can cover the welded pipe according to the curvature of the welded pipe, and the contact area between the anti-deviation plate 44 and the welded pipe will increase.

[0043] In summary, using the above-mentioned technical solution of the present invention: the welded pipe is placed on two fixed seats 14, the fixing bolt 16 is turned, the fixing bolt 16 will drive the clamping plate 18 to move downward, thereby clamping and fixing the top of the welded pipe through the clamping plate 18, so that the positions of the two welded pipes correspond. The docking motor 13 is started, the docking motor 13 will drive the double-headed screw 11 to rotate, and the double-headed screw 11 will drive the two moving plates 8 to move while rotating, thereby docking the two welded pipes. During the movement, the top fixing mechanism 3 will drive the positioning plate 20 and the rack 21 to move, and the rack 21 will mesh with the gear 24 during the movement, and the gear 24 will drive the rotating rod 23 to move synchronously during the meshing. The rotating rod 23 rotates, which drives one of the bevel gears 25 to rotate. The meshing between the two bevel gears 25 causes the other bevel gear 25 to drive the rotating shaft 26 to rotate. The rotating shaft 26 drives one of the pulleys 27 to rotate. The cooperation between the two pulleys 27 and the belt 28 causes the shaft 30 to drive the turntable 32 to rotate. At this time, the guide rod 35 will drive the support plate 37 and the side docking plate 39 to move under the guidance of the spiral groove 40. After the two welded pipes are docked, the side docking plate 39 is aligned with the side support seat 6. At the same time, the side docking plate 39 will act on the welded pipe. After the docking is completed, the welded pipe is welded by the welding mechanism.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pipe welding apparatus for self-positioning butt welding of a pipe, comprising a welding stand (1), a butt joint mechanism, two top fixing mechanisms (3) and a welding mechanism, the butt joint mechanism is fixed on the welding stand (1), the two top fixing mechanisms (3) are arranged on both sides of the butt joint mechanism, and the welding mechanism is fixed on the top of the welding stand (1), characterized in that, The top of the welding platform (1) is provided with a side edge fixing mechanism (5); The side edge fixing mechanism (5) comprises a transmission assembly (19), a support frame (31), a rotating table (32), a guide rod (35), a push plate (36), a support plate (37), a side edge support base (6) and a side edge butt joint plate (39), one end of the support frame (31) is fixed to the side edge of the butt joint mechanism, the rotating table (32) is rotationally connected to the inside of the support frame (31), a spiral groove (40) is formed in the circumferential outer wall of the rotating table (32), one end of the guide rod (35) is located in the inside of the spiral groove (40), and the other end is fixed to the push plate (36); the push plate (36) is fixedly connected with the support plate (37), the support plate (37) and the side edge butt joint plate (39) are fixedly connected with an elastic pad (38), the side edge support base (6) is fixed to the top fixing mechanism (3), guide grooves (33) are formed in the two sides of the support frame (31), and connecting rods (34) are slidably connected to the inside of the two guide grooves (33); one end of the connecting rod (34) is fixedly connected with the support plate (37). The top fixing mechanism (3) and the side fixing mechanism (5) are connected through a transmission assembly (19), the docking mechanism comprises a docking seat (2), two moving plates (8), a double-headed screw rod (11) and a docking motor (13), the docking seat (2) is fixed on the welding table (1), notches (10) are formed in the two sides of the top of the docking seat (2), the two notches (10) are rotatably connected with the double-headed screw rod (11), one side of the docking seat (2) is fixedly connected with the docking motor (13), the output end of the docking motor (13) is fixedly connected with the double-headed screw rod (11), the screw threads on the two sides of the double-headed screw rod (11) are opposite in direction, the two moving plates (8) are slidably connected in the two notches (10), one side of each of the two moving plates (8) penetrates a threaded hole matched with the double-headed screw rod (11), and the threaded hole is threadedly connected with the double-headed screw rod (11), the top fixing mechanism (3) comprises two supports (9), two fixing bases (14) and two clamping plates (18), the two supports (9) are symmetrically fixed on the top of the moving plate (8), the fixing base (14) is fixed on the support (9), the two sides of the fixing base (14) are fixedly connected with a connecting plate (15), the clamping plate (18) is provided with a clamping plate spring (17) between the connecting plate (15), the top of the connecting plate (15) penetrates a threaded hole, the inner wall of the threaded hole is threadedly connected with a fixing bolt (16), the bottom of the fixing bolt (16) acts on the clamping plate (18), the side support base (6) is arranged between the two fixing bases (14), the transmission assembly (19) comprises a rack (21), a support table (22), a rotating rod (23), a gear (24), two bevel gears (25), two belt pulleys (27), a belt (28) and a shaft rod (30), the rack (21) is fixed on one side of the positioning plate (20), the support table (22) is fixed on the welding table (1), the rotating rod (23) is rotatably connected to the support table (22), the gear (24) is sleeved on the rotating rod (23), one of the two bevel gears (25) is sleeved on the rotating rod (23), one side of the docking seat (2) is rotatably connected with a rotating shaft (26), the other bevel gear (25) is sleeved on the rotating shaft (26), the two bevel gears (25) are in meshing connection, the two belt pulleys (27) are sleeved on the rotating shaft (26) and the shaft rod (30) respectively, the two belt pulleys (27) are rotatably connected with the belt (28), and one end of the shaft rod (30) is fixed on the rotating table (32).

2. A pipe welding apparatus for self-positioning butt welding of a pipe according to claim 1, characterized by One side of each of the two notches (10) penetrates a positioning hole (12), and the inner walls of the two positioning holes (12) are slidably connected with a positioning plate (20).

3. A pipe welding apparatus for self-positioning butt welding of a pipe according to claim 1, characterized by The welding mechanism is composed of a welding frame (4) and a welding gun (7), the welding gun (7) is detachably installed on the welding frame (4), and the welding gun (7) is located above the docking mechanism.

4. A pipe welding apparatus for self-positioning butt welding of a pipe according to claim 1, characterized by One side of the side butt joint plate (39) is provided with a deviation prevention mechanism (29), which cooperates with the side fixing mechanism (5).

5. A pipe welding apparatus for self-positioning butt welding of a pipe according to claim 4, wherein The deviation prevention mechanism (29) comprises a push rod (43), a pressing plate (42) and a deviation prevention plate (44). A through opening (41) is formed in one side of the side butt joint plate (39). The pressing plate (42) is slidingly connected in the through opening (41). The pressing plate (42) is provided with a return spring on one side of the through opening (41). The push rod (43) is slidingly connected at the other end of the through opening (41). The push rod (43) is provided with a push rod spring between the through opening (41). The deviation prevention plate (44) is fixed at the bottom of the push rod (43).

6. A pipe welding apparatus for self-positioning butt welding of a pipe according to claim 5, wherein The deviation prevention plate (44) is made of elastic material.

Images