Multi-axis rotary welding tooling equipment and welding method

Abstract

The present invention belongs to the technical field of welding equipment, and in particular to a multi-axis rotary welding tooling equipment and a welding method; the present invention comprises: a fixed frame, the fixed frame is in an arc-shaped structure, and a pair of clamping frames are symmetrically rotatably connected on both sides of the fixed frame; a welding frame, the welding frame is in an annular structure, an annular guide rail is fixedly connected to the welding frame, a slide seat is slidably connected to the annular guide rail, and a welding assembly is connected to the slide seat; a gear ring is fixedly connected to the inner periphery of the annular guide rail, a first drive motor is installed on the slide seat, and a driving gear meshing with the gear ring is fixedly connected to the rotating shaft of the first drive motor; a lifting mechanism is fixedly connected to the fixed frame, a flipping mechanism is connected to the lifting mechanism, and is used to drive the welding frame to flip, and the welding frame is connected to the flipping mechanism; the present invention can weld two coaxial pipes and two vertical pipes by providing a fixed frame, a welding frame, a lifting mechanism and a flipping mechanism, so that the welding equipment has two automatic welding modes at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and in particular to a multi-axis rotary welding tooling equipment and a welding method. Background Art

[0002] Pipes are used in a wide range of areas, such as water conservancy projects. Most water conservancy projects are carried out outdoors. Metal pipes are often used in the construction of water conservancy projects. Since the pipes used in water conservancy projects are mostly long, ordinary metal pipes usually need to be welded for connection. Since the pipes used in water conservancy projects are pressure pipes, the requirements for the pipes are very high. If the welding quality is not high, the pipes will break after a period of use, and the pipes need to be welded in time.

[0003] Pipeline welding forms include coaxial pipe welding and vertical pipe welding. Coaxial pipe welding is to align the two ends of two concentric pipes and weld them together; vertical pipe welding is to vertically weld a branch pipe on the surface of the main pipe. Currently, most welding machines are only suitable for automatic welding of coaxial pipes, not for automatic welding of vertical pipes, and do not have the function to meet the welding of both types of pipes. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a multi-axis rotary welding tooling equipment and a welding method, which are provided with a fixing frame and a welding frame and have the function of welding two kinds of pipes at the same time, aiming to solve the problems in the background technology.

[0005] In order to achieve the above technical objectives, the specific technical scheme of the present invention is as follows: a multi-axis rotary welding tooling equipment proposed by the present invention includes: a fixed frame, the fixed frame is an arc-shaped structure, and a pair of clamping frames are symmetrically rotatably connected on both sides of the fixed frame, which is used to fix the fixed frame on the pipeline; a welding frame, the welding frame is an annular structure, and an annular guide rail is fixedly connected to the welding frame, and a slide seat is slidably connected to the annular guide rail, and a welding assembly is connected to the slide seat for welding the pipeline; a gear ring is fixedly connected to the inner periphery of the annular guide rail, a first drive motor is installed on the slide seat, and a drive gear meshing with the gear ring is fixedly connected to the rotating shaft of the first drive motor; a lifting mechanism, fixedly connected to the fixed frame, the lifting mechanism is used to drive the welding frame to lift and lower, and the lifting mechanism is connected to a flipping mechanism for driving the welding frame to flip, and the welding frame is connected to the flipping mechanism.

[0006] As a preferred technical solution of the present invention, the welding assembly includes a fixed arm, which is fixedly connected to the sliding seat, a first rotating arm is rotatably connected to the fixed arm, a second rotating arm is rotatably connected to the first rotating arm, and a rotating motor is installed at the end of the second rotating arm, a rotating arm is connected to the rotating motor, a support arm is vertically fixedly connected to the rotating arm, a micro motor is fixedly installed on the support arm, and a welding gun is fixedly installed on the rotating shaft of the micro motor.

[0007] As a preferred technical solution of the present invention, the flipping mechanism includes a lifting seat, which is connected to the lifting mechanism, a flipping motor is fixedly installed on the lifting seat, a flipping seat is fixedly installed on the rotating shaft of the flipping motor, and a connecting block hinged to the flipping seat is fixedly connected to the welding frame.

[0008] As a preferred technical solution of the present invention, a locking gear is coaxially fixedly connected to the connecting block, and a toothed plate capable of engaging with the locking gear is movably connected to the side of the flip seat. When the toothed plate engages with the locking gear, the angle between the connecting block and the flip seat is locked, and the first limit plate and the second limit plate are fixedly connected to the upper and lower sides of the flip seat respectively, and the first limit plate and the second limit plate are both used to limit the connecting block.

[0009] As a preferred technical solution of the present invention, a first double-headed cylinder is fixedly installed on the welding frame, a pair of sliding frames are symmetrically slidably connected to the welding frame, the sliding frames are fixedly connected to the piston rod of the first double-headed cylinder, and a first clamping seat is fixedly connected to the sliding frames for clamping and fixing the pipeline.

[0010] As a preferred technical solution of the present invention, a pair of brackets are fixedly connected to the clamping frame, and the brackets are rotatably connected to clamping wheels for clamping the pipe, and a second driving motor is fixedly installed on one of the brackets to drive the clamping wheel to rotate.

[0011] As a preferred technical solution of the present invention, a second double-headed cylinder is fixedly installed on the fixed frame, a groove rail is fixedly connected to the clamping frame, a slider is slidably connected to the groove rail, the slider is movably connected to the piston rod of the second double-headed cylinder, and an elastic member is fixedly connected between the slider and one end of the groove rail, a fixing rod is fixedly connected to the slider, and a second clamping seat is fixedly connected to the fixing rod for clamping on the pipe.

[0012] As a preferred technical solution of the present invention, the lifting mechanism adopts a lifting method in which a motor and a transmission screw cooperate. The motor drives the transmission screw to rotate, thereby driving the flip mechanism to lift and lower.

[0013] A welding method for a multi-axis rotary welding tooling device includes the following two welding methods:

[0014] Coaxial pipe welding: the fixing frame and the welding frame are adjusted to be parallel to each other, and the fixing frame and the welding frame are sleeved on the outer periphery of the pipe, and the fixing frame is fixed on the pipe by two clamping frames, and the welding frame is also fixed on the pipe, and the welding assembly is driven by the first driving motor to move in a circular motion on the annular guide rail. During the motion, the welding assembly welds the two coaxial pipes together;

[0015] Vertical pipeline welding: adjust the welding frame and the fixed frame to be perpendicular to each other, and use the flipping mechanism to drive the welding frame to flip 180 degrees, so that the welding assembly is located below the welding frame; then put the welding frame on the vertical pipeline, fix the fixed frame on the horizontal pipeline, and adjust the welding frame to the specified height through the lifting mechanism; drive the welding assembly to move in a circle on the annular guide rail through the first drive motor. During the movement, the welding assembly welds the vertical pipeline to the horizontal pipeline.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention is provided with a fixing frame, a welding frame, a lifting mechanism and a turning mechanism. When the welding frame is adjusted to a parallel state with the fixing frame, the welding tooling equipment can automatically weld two coaxial pipes; when the welding frame is adjusted to a vertical state with the fixing frame, two vertical pipes can be automatically welded, so that the welding equipment has two automatic welding modes at the same time.

[0018] 2. The present invention connects a clamping wheel to the clamping frame, and the second double-headed cylinder contracts to drive the clamping wheel to contact the pipe. The second drive motor drives the clamping wheel to rotate, thereby driving the welding equipment to move axially in the pipe, and can continuously weld multiple coaxial pipes. During welding, the second double-headed cylinder further contracts to drive the second clamping seat to contact the pipe, fixing the fixed frame on the pipe to ensure the stable position of the welding equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic structural diagram of a multi-axis rotary welding tooling device proposed by the present invention.

[0020] Figure 2 It is a schematic diagram of welding coaxial pipes in an embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of welding a vertical pipeline in an embodiment of the present invention.

[0022] Figure 4 This is a schematic structural diagram of the welding frame proposed by the present invention.

[0023] Figure 5 This is a schematic diagram from another angle of the welding frame proposed by the present invention.

[0024] Figure 6 This is a schematic structural diagram of the welding assembly proposed in the present invention.

[0025] Figure 7 This is a schematic structural diagram of the fixing frame proposed by the present invention.

[0026] Figure 8 This is a schematic diagram from another angle of the fixing bracket provided by the present invention.

[0027] Fig. 9 A schematic diagram of the structure of the flipping mechanism proposed by the present invention.

[0028] In the figure: 1, fixed frame; 2, welding frame; 21, annular guide rail; 22, gear ring; 23, slide seat; 24, first drive motor; 25, drive gear; 26, first double-headed cylinder; 27, sliding frame; 28, first clamp seat; 29, connecting block; 210, locking gear; 3, welding assembly; 31, fixed arm; 32, first rotating arm; 33, second rotating arm; 34, rotating arm; 35, support arm; 36, micro motor ; 37. welding gun; 38. rotating motor; 4. lifting mechanism; 5. flipping mechanism; 51. lifting seat; 52. flipping motor; 53. flipping seat; 54. first limit plate; 55. second limit plate; 56. tooth plate; 6. clamping frame; 61. groove rail; 62. slider; 63. elastic member; 64. fixing rod; 65. second clamping seat; 66. bracket; 67. clamping wheel; 68. second drive motor; 7. second double-head cylinder. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Embodiment: This embodiment discloses a multi-axis rotary welding tooling equipment, such as Figure 1-Figure 9 As shown, it includes: a fixing frame 1, the fixing frame 1 is an arc-shaped structure, and a pair of clamping frames 6 are symmetrically connected to the fixing frame 1 on both sides for fixing the fixing frame 1 on the pipeline, and the clamping frames 6 are an arc-shaped structure; a welding frame 2, the welding frame 2 is an annular structure, and an annular guide rail 21 is fixedly connected to the welding frame 2, and a slide seat 23 is slidably connected to the annular guide rail 21, and a welding assembly 3 is connected to the slide seat 23 for welding the pipeline; a gear ring 22 is fixedly connected to the inner periphery of the annular guide rail 21, and a first drive motor 24 is installed on the slide seat 23, and a gear ring 22 is fixedly connected to the inner periphery of the annular guide rail 21, and a first drive motor 24 is fixedly connected to the rotating shaft of the first drive motor 24. The driving gear 25 meshed with the circle 22 is driven to rotate by the first driving motor 24, and the welding assembly 3 is driven to slide along the annular guide rail 21, thereby rotating around the pipeline to weld the pipeline; the lifting mechanism 4 is fixedly connected to the fixed frame 1, and the lifting mechanism 4 is used to drive the welding frame 2 to lift and lower, and the lifting mechanism 4 is connected to the flipping mechanism 5, which is used to drive the welding frame 2 to flip, and the welding frame 2 is connected to the flipping mechanism 5; the flipping mechanism 5 can drive the welding frame 2 to flip 180°, and the lifting mechanism 4 drives the welding frame 2 to lift and lower, and adjusts the position of the welding frame 2.

[0031] Preferably, the lifting mechanism 4 adopts a lifting method in which a motor and a transmission screw cooperate. The motor drives the transmission screw to rotate, driving the flip mechanism 5 to lift and lower. For pipe welding of the same size, the position of the welding frame 2 driven by the motor to lift and lower is fixed.

[0032] like Figure 4-Figure 6 As shown, a first double-headed cylinder 26 is fixedly installed on the welding frame 2, and the first double-headed cylinder 26 and the welding assembly 3 are respectively arranged on both sides of the welding frame 2, and a pair of sliding frames 27 are symmetrically slidably connected to the welding frame 2, and a slide rail that slidably cooperates with the sliding frame 27 is provided on the welding frame 2, and the sliding frame 27 is fixedly connected to the piston rod of the first double-headed cylinder 26, and a first clamping seat 28 is fixedly connected to the sliding frame 27 for clamping and fixing the pipeline; the first clamping seat 28 is driven to move by the first double-headed cylinder 26 so that the first clamping seat 28 contacts with the pipeline, and then the welding frame 2 is fixedly installed on the pipeline; when welding the vertical pipeline, the first clamping seat 28 can clamp and fix the vertical pipeline to ensure that the vertical pipeline position is stable; wherein, the welding assembly 3 includes a fixed arm 31, the fixed arm 31 is fixedly connected to the slide seat 23, and the fixed arm 31 is rotatably connected to the first rotating arm 32, the first rotating arm 32 is rotatably connected to the second rotating arm 33, wherein the first rotating arm 32 and the second rotating arm 33 are both driven to rotate by a motor, and a rotating motor 38 is installed at the end of the second rotating arm 33, and a rotating arm 34 is connected to the rotating motor 38, and a support arm 35 is vertically fixedly connected to the rotating arm 34, and a micro motor 36 is fixedly installed on one end of the support arm 35, and a welding gun 37 is fixedly installed on the rotating shaft of the micro motor 36; the welding assembly 3 is provided with two rotating arms and multiple rotating shafts, which greatly improves the flexibility of welding; wherein the rotating motor 38 is used for a large adjustment of the welding gun 37, and the micro motor 36 is used for precise adjustment of the position of the welding gun 37; wherein the position of the welding gun 37 can be adjusted by collecting pipeline shape image information through a visual sensor, so as to help the welding tooling equipment to use image vision to identify and track welds.

[0033] like Figure 7-As shown in 8, a pair of brackets 66 are fixedly connected to the clamping frame 6, and a clamping wheel 67 is rotatably connected to the bracket 66 for clamping the pipe. The two clamping wheels 67 on the same clamping frame 6 are respectively arranged on the upper and lower sides of the pipe, and the clamping wheel 67 can move along the axial direction of the pipe. The four clamping wheels 67 can stably clamp the pipe; and a second driving motor 68 is fixedly installed on one of the brackets 66 for driving the clamping wheel 67 to rotate. The second driving motor 68 drives one of the clamping wheels 67 to rotate, thereby driving the welding tool to move along the axial direction of the pipe, which is convenient for connecting and welding multiple coaxial pipes; a second double-headed cylinder 7 is fixedly installed on the fixed frame 1, and a groove rail 61 is fixedly connected to the clamping frame 6, and a slider 62 is slidably connected to the groove rail 61. The slider 62 is movably connected to the piston rod of the second double-headed cylinder 7, wherein the slider 62 is provided with a vertical strip groove, and one end of the piston rod of the second double-headed cylinder 7 is provided with a The shaft rod connected to the pipeline can be rotated in the strip groove and can also move up and down, avoiding the jamming of the piston rod of the second double-headed cylinder 7 and the slider 62; and an elastic member 63 is fixedly connected between the slider 62 and one end of the groove rail 61, and the elastic member 63 adopts a spring. A fixing rod 64 is fixedly connected to the slider 62, and a second clamping seat 65 is fixedly connected to the fixing rod 64 for clamping on the pipeline; when it is necessary to fix the fixing frame 1 on the pipeline, the second double-headed cylinder 7 contracts and first drives the two clamping frames 6 to approach each other, and the clamping wheel 67 contacts the pipeline surface first. At this time, the second driving motor 68 drives one of the clamping wheels 67 to rotate, which can drive the welding tooling equipment to move axially along the pipeline; during welding, the second double-headed cylinder 7 continues to contract, the slider 62 slides on the groove rail 61, the elastic member 63 is compressed by force, and then drives the second clamping seat 65 to contact the pipeline surface, and then the fixing frame 1 is fixedly installed on the pipeline, ensuring the stable position of the welding tooling during welding.

[0034] like Fig. 9As shown, the flip mechanism 5 includes a lifting seat 51, which is connected to the lifting mechanism 4. A flip motor 52 is fixedly installed on the lifting seat 51, and the flip motor 52 has an automatic locking function. A flip seat 53 is fixedly installed on the rotating shaft of the flip motor 52. A connecting block 29 hinged to the flip seat 53 is fixedly connected to the welding frame 2; a locking gear 210 is coaxially fixedly connected to the connecting block 29, and a tooth plate 56 that can engage with the locking gear 210 is movably connected to the side of the flip seat 53, and the tooth plate 56 can be pulled outward to separate it from the locking gear 210. When the tooth plate 56 is engaged with the locking gear 210, the angle between the connecting block 29 and the flip seat 53 is locked. When it is necessary to rotate the welding frame 2, first pull the tooth plate 56 outward to lock it and separate it from the locking gear 210, and then the welding frame 2 can be rotated; and the first limit plate 54 and the second limit plate 55 are fixedly connected to the upper and lower sides of the flip seat 53, respectively, and the first limit plate 54 and the second limit plate 55 are both used to limit the connecting block 29, so that the angle of the welding frame 2 is accurate, and when the connecting block 29 contacts with the first limit plate 54, the welding frame 2 and the fixed frame 1 are perpendicular to each other; when the connecting block 29 contacts with the second limit plate 55, the welding frame 2 and the fixed frame 1 are parallel to each other, and the position of the welding frame 2 can be locked by engaging the tooth plate 56 with the locking gear 210.

[0035] This embodiment also discloses a welding method of a multi-axis rotary welding tooling device, based on the above-mentioned welding tooling device, including the following two welding methods:

[0036] Coaxial pipe welding: the fixing frame 1 and the welding frame 2 are adjusted to be parallel to each other, and the height of the welding frame 2 is adjusted by the lifting mechanism 4, so that the welding frame 2 and the fixing frame 1 are in the same circle center position, and the fixing frame 1 and the welding frame 2 are sleeved on the outer periphery of the pipe, and the pipe is fixed in a suspended state by other workpieces, and the fixing frame 1 is fixed to one of the pipes by two clamping frames 6, and the welding frame 2 is also fixed to the pipe by two first clamping seats 28, and then the welding assembly 3 is driven by the first driving motor 24 to move in a circle on the annular guide rail 21, and during the movement, the welding assembly 3 welds the two coaxial pipes together;

[0037] Vertical pipe welding: adjust the welding frame 2 and the fixed frame 1 to be perpendicular to each other, and drive the welding frame 2 to flip 180° through the flipping mechanism 5, so that the welding assembly 3 is located below the welding frame 2; then put the welding frame 2 on the vertical pipe, and fix the fixed frame 1 on the horizontal pipe; adjust the welding frame 2 to a specified height through the lifting mechanism 4, and the vertical pipe is clamped and fixed by two first clamps 28 to ensure its stable position; then drive the welding assembly 3 to move in a circle on the annular guide rail 21 through the first drive motor 24. During the movement, the welding assembly 3 welds the vertical pipe to the horizontal pipe. During the vertical pipe welding process, the difference from the coaxial pipe welding is that during the circular motion of the welding assembly 3, the position of the welding gun 37 needs to be adjusted through the cooperation of the first rotating arm 32 and the second rotating arm 33, so that the end of the welding gun 37 remains at the connection between the two pipes.

[0038] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-axis rotary welding tooling equipment, characterized in that: include: A fixing frame (1), the fixing frame (1) is in an arc-shaped structure, and a pair of clamping frames (6) are symmetrically rotatably connected on both sides of the fixing frame (1) for fixing the fixing frame (1) on the pipeline; A welding frame (2), the welding frame (2) being of an annular structure, the welding frame (2) being fixedly connected to an annular guide rail (21), the annular guide rail (21) being slidably connected to a slide seat (23), the slide seat (23) being connected to a welding assembly (3) for welding a pipeline; a gear ring (22) being fixedly connected to the inner periphery of the annular guide rail (21), a first drive motor (24) being mounted on the slide seat (23), a drive gear (25) meshing with the gear ring (22) being fixedly connected to the rotating shaft of the first drive motor (24); A lifting mechanism (4) is fixedly connected to the fixed frame (1), the lifting mechanism (4) is used to drive the welding frame (2) to lift and lower, the lifting mechanism (4) is connected to a turning mechanism (5) for driving the welding frame (2) to turn, and the welding frame (2) is connected to the turning mechanism (5); The turnover mechanism (5) comprises a lifting seat (51), the lifting seat (51) is connected to the lifting mechanism (4), a turnover motor (52) is fixedly mounted on the lifting seat (51), a turnover seat (53) is fixedly mounted on the rotating shaft of the turnover motor (52), and a connecting block (29) hinged to the turnover seat (53) is fixedly connected to the welding frame (2); The connecting block (29) is coaxially fixedly connected with a locking gear (210), and a toothed plate (56) capable of engaging with the locking gear (210) is movably connected to the side of the flip seat (53); when the toothed plate (56) engages with the locking gear (210), the angle between the connecting block (29) and the flip seat (53) is locked, and the first limiting plate (54) and the second limiting plate (55) are respectively fixedly connected to the upper and lower sides of the flip seat (53); the first limiting plate (54) and the second limiting plate (55) are both used to limit the connecting block (29); A pair of brackets (66) are fixedly connected to the clamping frame (6), and a clamping wheel (67) is rotatably connected to the bracket (66) for clamping the pipe, and a second drive motor (68) is fixedly mounted on one of the brackets (66) for driving the clamping wheel (67) to rotate; A second double-headed cylinder (7) is fixedly mounted on the fixing frame (1); a groove rail (61) is fixedly connected to the clamping frame (6); a slider (62) is slidably connected to the groove rail (61); the slider (62) is movably connected to a piston rod of the second double-headed cylinder (7); an elastic member (63) is fixedly connected between the slider (62) and one end of the groove rail (61); a fixing rod (64) is fixedly connected to the slider (62); and a second clamping seat (65) is fixedly connected to the fixing rod (64) for clamping on a pipeline.

2. The multi-axis rotary welding tooling equipment according to claim 1, characterized in that: The welding assembly (3) comprises a fixed arm (31), the fixed arm (31) being fixedly connected to the slide seat (23), a first rotating arm (32) being rotatably connected to the fixed arm (31), a second rotating arm (33) being rotatably connected to the first rotating arm (32), a rotating motor (38) being mounted at the end of the second rotating arm (33), a rotating arm (34) being connected to the rotating motor (38), a support arm (35) being vertically fixedly connected to the rotating arm (34), a micro motor (36) being fixedly mounted on the support arm (35), and a welding gun (37) being fixedly mounted on the rotating shaft of the micro motor (36).

3. The multi-axis rotary welding tooling equipment according to claim 2, characterized in that: A first double-headed cylinder (26) is fixedly mounted on the welding frame (2), a pair of sliding frames (27) are symmetrically slidably connected to the welding frame (2), the sliding frames (27) are fixedly connected to the piston rods of the first double-headed cylinder (26), and a first clamping seat (28) is fixedly connected to the sliding frames (27) for clamping and fixing the pipeline.

4. The multi-axis rotary welding tooling equipment according to claim 3, characterized in that: The lifting mechanism (4) adopts a lifting method in which a motor and a transmission screw cooperate. The motor drives the transmission screw to rotate, thereby driving the flip mechanism (5) to lift and lower.

5. A welding method using a multi-axis rotary welding fixture, using a multi-axis rotary welding fixture as claimed in any one of claims 1 to 4, characterized in that: There are two welding methods: Coaxial pipe welding: the fixing frame (1) and the welding frame (2) are adjusted to be parallel to each other, the fixing frame (1) and the welding frame (2) are sleeved on the outer periphery of the pipe, and the fixing frame (1) is fixed on the pipe by two clamping frames (6), and the welding frame (2) is also fixed on the pipe, and the welding assembly (3) is driven by the first driving motor (24) to move in a circular motion on the annular guide rail (21), and during the motion, the welding assembly (3) welds the two coaxial pipes together; Vertical pipeline welding: the welding frame (2) and the fixed frame (1) are adjusted to be perpendicular to each other, and the welding frame (2) is driven to be turned 180 degrees by the turning mechanism (5), so that the welding assembly (3) is located below the welding frame (2); then the welding frame (2) is sleeved on the vertical pipeline, the fixed frame (1) is fixed on the horizontal pipeline, and the welding frame (2) is adjusted to a specified height by the lifting mechanism (4); the welding assembly (3) is driven to move in a circle on the annular guide rail (21) by the first driving motor (24), and during the movement, the welding assembly (3) welds the vertical pipeline to the horizontal pipeline.

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