A guide device for pipe welding

Abstract

The application discloses a guide device for pipeline welding, which comprises a welding base, a guide column assembly, an inner guide rod and an outer guide rod. The guide column assembly comprises an end plate and a center column. The inner end of the center column extends into a pipeline No. 2 to be welded, and the outer end of the center column extends out of the pipeline No. 2 and is connected with the end plate. The inner end of the inner guide rod is in abutment with a tangent line of the inner wall of a pipeline No. 1, and the middle part of the inner guide rod is in sliding fit with the center column through a sliding sleeve. The outer end of the inner guide rod is connected with one end of a locking rod through the end plate. The outer guide rod is close to the outer wall of the pipeline No. 2 near the inner guide rod, the upper end of the outer guide rod is connected with the other end of the locking rod through the end plate, and the lower end of the outer guide rod is provided with a welding gun. A first spring is arranged between the locking rod and the end plate. The pipeline No. 1 is arranged on the welding base, and the pipeline No. 2 is connected with the pipeline No. 1 perpendicularly. The guide device of the application can make the welding gun keep a specified posture and move along a welding tangent line, and can realize automatic pipeline welding by only rotating the guide device, so that the welding quality and efficiency are high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline welding, in particular to a guiding device for pipeline welding. BACKGROUND

[0002] The pipeline installation process usually needs to be welded, and the two sections of the pipeline are coaxially butted, and then welded by manual welding or automatic welding equipment. However, for complex irregular pipeline welds, such as the intersection line welding of two circular pipelines, a welding positioner technology is usually used to adjust the posture and position of the welding gun during movement, and to complete the automatic trajectory welding of complex intersection lines. However, the welding positioner technology requires a large number of motors and complex mechanisms, and the trajectory of the intersection line needs to be specially measured before welding, which takes a long time and limits the efficiency of pipeline welding, and the overall operation and maintenance cost is high. SUMMARY

[0003] The present application is to overcome the shortcomings of the prior art, and to provide a guiding device for pipeline welding, which solves the problem that the existing pipeline welding equipment can only be applied to single regular welds, and the welding cost of pipeline intersection lines is high and the efficiency is low.

[0004] The technical scheme adopted by the present application to solve the technical problem is:

[0005] A guiding device for pipeline welding, comprising a welding base, further comprising a guide column assembly, an inner guide rod and an outer guide rod; the guide column assembly comprises an end plate and a center column; the inner end of the center column extends into a second pipeline, and the outer end of the center column extends out of the second pipeline and is connected with the end plate; a sliding sleeve abutting against the inner wall of the second pipeline is arranged along the axial direction of the center column; the inner end of the inner guide rod abuts against the intersection line of the inner wall of a first pipeline, and the middle part of the inner guide rod passes through the sliding sleeve and is in sliding fit; the outer end of the inner guide rod is connected with one end of a locking rod through the end plate; a first spring is installed between the locking rod and the end plate; the outer guide rod is close to the outer wall of the second pipeline near the inner guide rod, the upper end of the outer guide rod is connected with the other end of the locking rod through the end plate, and the lower end of the outer guide rod is provided with a welding gun; the first pipeline and the second pipeline are circular pipes, the first pipeline is installed on the welding base, and the second pipeline is connected with the first pipeline in a vertical direction.

[0006] Further, the end of the outer guide rod is hinged with a bracket, and the bracket is provided with a mounting hole suitable for the welding gun.

[0007] Further, a roller is sleeved on the outer guide rod, and the outer guide rod abuts against the outer wall of the second pipeline through the roller.

[0008] Further, a second spring is sleeved on the outer guide rod, one end of the second spring abuts against the end plate, and the other end of the second spring abuts against the roller.

[0009] Further, a guide cylinder and a plurality of positioning cylinders are arranged around the center column, and the guide cylinder and the positioning cylinders are each provided with a positioning spring; the guide column assembly comprises a positioning column in sliding cooperation with the positioning cylinders, and the sliding sleeve is provided with a guide column in sliding cooperation with the guide cylinder, and the inner end of the guide column and the inner end of the positioning column are in abutment with the positioning spring; the end plate is provided with a driving shaft for driving the guide device to rotate, and the driving shaft is coaxial with the center column.

[0010] Further, the inner end of the inner guide rod is provided with a rotating shaft, a roller is mounted on the rotating shaft, the roller is connected with the rotating shaft through a ball head, the rotating shaft is located on the same side of the inner guide rod as the locking rod, and the rotating shaft is parallel to the locking rod.

[0011] Further, a first open slot is formed in the end plate, and the inner guide rod and the outer guide rod are in abutment with the side wall of the first open slot; a second open slot is formed in the locking rod, and the outer guide rod is in abutment with the side wall of the second open slot.

[0012] The present application has the following beneficial effects:

[0013] 1. The present application provides a guide device for pipeline welding, which comprises a welding base, a guide column assembly, an inner guide rod and an outer guide rod; a pipeline two to be welded is connected perpendicularly with a pipeline one, and the pipeline one is mounted on the welding base; the guide column assembly comprises an end plate and a center column; the inner end of the center column extends into the pipeline two to be welded, and the outer end of the center column is connected with the end plate; the outer end of the inner guide rod is connected with one end of a locking rod through the end plate; the middle part of the inner guide rod is in sliding cooperation with the center column through a sliding sleeve; the outer guide rod is close to the outer wall of the pipeline two near the inner guide rod, the upper end of the outer guide rod is connected with the inner guide rod as a whole through the locking rod, and a welding gun is mounted at the lower end of the outer guide rod; a first spring is mounted between the locking rod and the end plate, and the inner end of the inner guide rod is always pressed against the inner wall of the pipeline one by the elastic force of the spring; the guide device is rotated to drive the welding gun to move along the welding intersecting line, so that automatic welding of two pipelines at any included angle is realized, the welding efficiency of complex intersecting lines is improved, and the welding operation in the construction site is suitable.

[0014] 2. The welding gun is hingedly connected at the end of the outer guide rod through a support, so that the posture of the welding gun can be adjusted, the welding gun is in a suitable welding posture, and the welding quality is ensured.

[0015] 3. A roller is sleeved on the outer guide rod, and the roller is moved by abutting against the outer wall of the pipeline two, so that the roller plays a supporting and limiting role.

[0016] 4. A second spring is arranged between the roller and the end plate, the second spring is sleeved on the outer guide rod, plays a guiding and auxiliary force role, and enables the welding gun to move stably.

[0017] 5. The guide column assembly further comprises a positioning column and a guide column, which are respectively elastically connected in the positioning cylinder and the guide cylinder through positioning springs, under the action of the positioning springs, the central column is supported and the central axis of the central column coincides with the central axis of the second pipeline, so that the handle or the servo motor drives the guide device to stably rotate, and the welding quality of the intersecting line is ensured.

[0018] 6. A rotatable roller is installed on the inner guide rod, the roller is tightly combined with the inner wall of the first pipeline along the intersecting line, and the moving track of the welding gun is ensured to completely move along the track of the intersecting line.

[0019] 7. The end plate is provided with a first open slot and a second open slot, which are convenient for assembling the inner guide rod and the outer guide rod, so that the guide device is suitable for welding pipelines with different wall thicknesses. BRIEF DESCRIPTION OF DRAWINGS

[0020] The application will be further described below in combination with the drawings:

[0021] Figure 1 It is a front view of the use state of the application;

[0022] Figure 2 It is a perspective structural schematic view of the application;

[0023] Figure 3 It is a sectional view of the application;

[0024] Figure 4 It is Figure 3 It is a local enlarged view at A;

[0025] Figure 5 It is a structural schematic view of the application in which the outer guide rod moves to the outside of the first pipeline;

[0026] Figure 6 It is Figure 5 It is a local enlarged view at B;

[0027] Figure 7 It is a connection structural schematic view of the guide column assembly, the inner guide rod and the locking rod of the application.

[0028] In the drawings, 1 is a guide column assembly; 11 is an end plate; 111 is a first open slot; 12 is a central column; 121 is a sliding sleeve; 122 is a positioning cylinder; 123 is a guide cylinder; 124 is a positioning column; 125 is a guide column; 2 is an inner guide rod; 21 is a first spring; 22 is a roller; 3 is an outer guide rod; 31 is a support; 32 is a roller; 33 is a second spring; 4 is a second pipeline; 5 is a first pipeline; 6 is a locking rod; 61 is a second open slot; and 7 is a welding gun. DETAILED DESCRIPTION

[0029] In order for the person skilled in the art to better understand the technical solutions in the present application, the technical solutions in the present application will be clearly and completely described below in combination with the drawings in the present application.

[0030] As shown in Figures 1-7 The present application provides a guide device for pipe welding, which comprises a welding base, and further comprises a guide column assembly 1, an inner guide rod 2 and an outer guide rod 3. The guide column assembly 1 comprises an end plate 11 and a center column 12. The inner end of the center column 12 extends into a pipe 2 along the axial direction of the pipe 2, and the outer end of the center column 12 extends out of the pipe 2 and is connected with the end plate 11. The axial direction of the center column 12 is parallel to the axial direction of the pipe 2. The end plate 11 is pressed against the outer side of the pipe 2. A sliding sleeve 121 abutting against the inner wall of the pipe 2 is arranged along the axial direction of the center column 12.

[0031] The inner guide rod 2 is located inside the pipe 2. The inner end of the inner guide rod 2 abuts against the tangent line of the inner wall of a pipe 1. The middle part of the inner guide rod 2 passes through the sliding sleeve 121 and is in sliding fit. The outer end of the inner guide rod 2 is connected with one end of a locking rod 6 through the end plate 11. Preferably, the outer end of the inner guide rod 2 is fixedly connected with one end of the locking rod 6. It can be understood that the sliding sleeve 121 limits the position of the inner guide rod 2, so that the inner guide rod 2 is close to the inner wall of the pipe 2. When the end plate 11 is pressed against the pipe 2, the end plate 11 is rotated around the center of the pipe 2, so that the inner guide rod 2 moves along the circumference of the inner wall of the pipe 2.

[0032] A first spring 21 is arranged between the locking rod 6 and the end plate 11. Under the elastic force of the first spring 21, the inner end of the inner guide rod 2 is pressed against the inner wall of the pipe 1, and the inner guide rod 2 is pushed downward. The inner end of the inner guide rod 2 is away from the inner wall of the pipe 1 by overcoming the elastic force of the first spring 21. Since the tangent line of the inner wall of the pipe 1 is a spatial curve, when the inner guide rod 2 moves along the circumference of the inner wall of the pipe 2, the inner end and the outer end of the inner guide rod 2 are respectively subjected to the action of the inner wall of the pipe 1 and the first spring 21. The inner end of the inner guide rod 2 moves along the track of the tangent line of the inner wall of the pipe 1, so that the outer end of the inner guide rod 2 moves synchronously with the inner end.

[0033] The outer guide rod 3 is close to the outer wall of the pipe 2 and close to the inner guide rod 2, and the outer guide rod 3 is parallel to the inner guide rod 2. The upper end of the outer guide rod 3 is connected with the other end of the locking rod 6 through the end plate 11, and the lower end of the outer guide rod 3 is provided with a welding gun 7. The welding gun 7 is arranged towards the tangent line of the outer wall of the pipe 2.

[0034] The pipe two 4 and the pipe one 5 are circular pipes, the pipe one 5 is installed on a welding base, and the pipe two 4 is connected with the pipe one 5 perpendicularly along the vertical direction; specifically, the pipe one 5 is fixed to the welding base (not shown in the figure) along the horizontal direction through a clamp. In order to facilitate the welding operation and improve the welding stability, the pipe two 4 is aligned with the pipe one 5 according to the intersection line and is connected with the pipe one 5 through spot welding; after the pipe two 4 is connected with the pipe one 5, the guide column assembly 1, the inner guide rod 2 and the outer guide rod 3 are placed on the pipe two 4.

[0035] As a specific embodiment, the servo motor is fixed to a welding workbench (not shown in the figure) through a support 31, so that the output shaft of the servo motor coincides with the central axis of the pipe two 4; the outer side of the end plate 11 is drivingly connected with the output shaft of the servo motor, the end plate 11 is rotated by the servo motor, and the automatic circumferential movement of the inner guide rod 2 and the outer guide rod 3 in the inner and outer walls of the pipe two 4 is realized.

[0036] It can be understood that when the central axis of the pipe two 4 and the central axis of the pipe one 5 are connected at an acute angle to form an irregular intersection line, or the pipe two 4 and the pipe one 5 are coaxially connected to form a circular weld, the inner end of the inner guide rod 2 can move along the corresponding intersection line or the circular weld by using the guide device of the present application, that is, the welding gun 7 always maintains a suitable distance from the weld, and the pipe welding quality can be met, and the guide device has high practicability. The guide device of the present application is suitable for intersection line welding of a pipe two 4 with an inner diameter smaller than that of a pipe one 5.

[0037] As shown in Figure 3 , 4 , the end of the outer guide rod 3 is hingedly connected with a support 31, and the support 31 is provided with a mounting hole suitable for the welding gun 7. In this embodiment, one end of the support 31 is hingedly connected with the end of the outer guide rod 3, and the hinge shaft is perpendicular to the outer guide rod 3; the mounting hole is arranged on the movable end of the support 31; in order to improve the flexibility of adjusting the posture of the welding gun, the support 31 and the end of the outer guide rod 3 can also be connected by a universal ball head. The support 31 is rotated around the hinged part, the included angle between the welding gun 7 and the central axis of the pipe two 4 is adjusted to meet the requirements, and then the support 31 is locked on the end of the outer guide rod 3 by a locking handle, so that the welding gun 7 is in a suitable welding posture to ensure the welding quality; it can be understood that the welding gun 7 can move along the mounting hole of the support 31 to fine-tune the distance between the welding gun 7 and the weld.

[0038] A roller 32 is sleeved on the outer guide rod 3, and the outer guide rod 3 abuts against the outer wall of the pipe two 4 through the roller 32. The roller 32 rolls around the central axis of the outer guide rod 3, which reduces the friction between the outer guide rod 3 and the pipe wall of the pipe two 4 when the outer guide rod 3 moves, and also supports and limits the outer guide rod 3, thereby avoiding the shaking of the welding gun 7 and improving the stability of the welding gun 7 during movement and welding.

[0039] As shown in Figure 1As shown, the outer guide rod 3 is sleeved with a second spring 33, one end of the second spring 33 is pressed against the end plate 11, and the other end of the second spring 33 is pressed against the roller 32. The second spring 33 is coaxially arranged with the outer guide rod 3, and the elastic force of the second spring 33 acts on the end of the roller 32, providing auxiliary force and guiding effect for the axial movement of the outer guide rod 3, facilitating the axial movement of the outer guide rod 3, avoiding the inclination of the outer guide rod 3, causing the welding gun 7 to swing away from the intersecting line, and reducing the weld quality.

[0040] As shown in the drawings, Figure 7 As shown, a guide cylinder 123 and a plurality of positioning cylinders 122 are arranged around the center column 12, and a positioning spring is arranged in each of the guide cylinder 123 and the positioning cylinder 122; the guide cylinder 123 and the plurality of positioning cylinders 122 are uniformly and spacedly arranged around the center column 12; the positioning cylinder 122 is connected to the center column 12 along the axis direction perpendicular to the center column 12, and the guide cylinder 123 is connected to one side of the center column 12 along the axis direction perpendicular to the center column 12.

[0041] The guide column assembly 1 further comprises a positioning column 124 which is in sliding cooperation with the positioning cylinder 122, and the sliding sleeve 121 is provided with a guide column 125 which is in sliding cooperation with the guide cylinder 123, and the inner end of the guide column 125 and the inner end of the positioning column 124 are in abutment with the positioning spring.

[0042] In this embodiment, each guide cylinder 123 is coplanar with two positioning cylinders 122 and uniformly surrounds the center column 12; two guide cylinders 123 are arranged along the axial direction of the center column 12, that is, the guide cylinder 123 and the positioning cylinder 122 form two positioning surfaces to limit the position of the center column 12 in the pipeline 2; that is, the guide column 125 connected with the guide cylinder 123 and the sliding sleeve 121 have two groups, and the two sliding sleeves 121 are axially connected in series in the middle part of the outer guide rod 3.

[0043] The center column 12 is arranged in the pipeline 2, the positioning spring acts on the inner end of the guide column 125 and the inner end of the positioning column 124, the outer end of the guide column 125 and the outer end of the positioning column 124 are close to the wall of the pipeline 2, and finally the outer end of the positioning column 124 and the sliding sleeve 121 are pressed against the wall of the pipeline 2, the upper and lower positions of the center column 12 are limited, and the central axis of the center column 12 is limited on the central axis of the pipeline 2; it can be understood that the inner guide rod 2 and the outer guide rod 3 are in the same direction as the center column 12 at this time.

[0044] The end plate 11 is provided with a driving shaft for driving the guide device to rotate, and the driving shaft is coaxial with the center column 12; a rotating handle or a servo motor is installed on the driving shaft as the driving force for rotating the guide device, the center column 12 is driven to rotate around the center of the pipeline 2 from the outside, and during the rotating process, the positioning column 124 plays a role of auxiliary support, so that the inner guide rod 2 and the outer guide rod 3 can stably rotate around the center of the pipeline 2.

[0045] As shown in the drawings, Figure 4As shown, the inner end of the inner guide rod 2 is provided with a rotating shaft, a roller 22 is installed on the rotating shaft, the roller 22 is connected with the rotating shaft through a ball head, the rotating shaft and the locking rod 6 are located on the same side of the inner guide rod 2, and the rotating shaft is parallel to the locking rod 6. The wheel surface of the roller 22 is an outer convex arc surface, which is convenient for abutting against the inner wall of the pipeline one 5. When the inner guide rod 2 moves, the roller 22 abuts against and rolls on the inner wall of the pipeline one 5, and adaptively rotates around the ball head of the rotating shaft. The roller 22 makes the inner end of the inner guide rod 2 closely fit the tangent line of the inner wall of the pipeline one 5, avoids the moving track of the welding gun deviating from the weld, and reduces the welding quality.

[0046] As shown in Figure 6 , 7 , a first open slot 111 is formed in the end plate 11, and the inner guide rod 2 and the outer guide rod 3 abut against the side wall of the first open slot 111. A second open slot 61 is formed in the locking rod 6, and the outer guide rod 3 abuts against the side wall of the second open slot 61. Specifically, the inner guide rod 2 and the outer guide rod 3 pass through the first open slot 111 in the end plate 11, and abut against the side wall of the first open slot 111. Through the first open slot 111, the outer guide rod 3 is conveniently close to the inner guide rod 2 and is installed on the locking rod 6. When the end plate 11 drives the inner guide rod 2 and the outer guide rod 3 to move circumferentially, the first open slot 111 of the end plate 11 limits the inner guide rod 2 and the outer guide rod 3, so that the inner guide rod 2 and the outer guide rod 3 keep parallel and synchronous circumferential movement.

[0047] The end of the outer guide rod 3 passes through the second open slot 61, the end of the outer guide rod 3 is provided with external threads, two locking nuts are threadedly connected on the outer guide rod 3, and the outer guide rod 3 is fixedly connected with the locking rod 6 through the two locking nuts clamping the locking rod 6. It can be understood that, due to the first open slot 111 and the second open slot 61, the outer guide rod 3 can move positions along the first open slot 111 and the second open slot 61, the distance between the outer guide rod 3 and the inner guide rod 2 can be changed, different wall thicknesses of the pipeline two 4 can be adapted, and the practicability of the guiding device is improved.

[0048] The installation process of the guiding device is as follows: S1, first, the outer end of the inner guide rod 2 sequentially passes through the sliding sleeve 121, the end plate 11, and is connected to one end of the locking rod 6; the first spring 21 is sleeved on the inner guide rod 2 and is arranged between the locking rod 6 and the end plate 11; the outer end of the inner guide rod 2 is threadedly connected with a nut, and the locking rod 6 is pushed to press the first spring 21 by rotating the nut; at this time, under the elastic force of the first spring 21, the roller 22 at the inner end of the inner guide rod 2 is close to the sliding sleeve 121; finally, the locking rod 6 is operated to rotate the inner guide rod 2 in the sliding sleeve 121, so that the other end of the locking rod 6 faces the center of the pipeline two 4, that is, the roller 22 is close to the center of the pipeline two 4; thus, the preliminary assembly of the guiding assembly is completed;

[0049] S2, the inner guide rod 2, the center column 12 is placed in the pipe two 4, the center column 12 is aligned with the center of the pipe two 4;Press the positioning column 124, the sleeve 121 and the inner wall of the pipe two 4 abut, while the center column 12 is moved to the pipe two 4, so that the end plate 11 is pressed against the pipe;

[0050] S3, the operation locking rod 6 compression first spring 21, push the inner guide rod 2 to the direction of pipe one 5, when the roller 22 enters the pipe one 5, turn the locking rod 6 towards the outside of the pipe two 4, then release the locking rod 6, under the action of the first spring 21, the roller 22 and the inner wall of the pipe one 5 intersection line abutment;

[0051] S4, the outer guide rod 3 from the first opening slot 111, the second opening slot 61 translation close to the inner guide rod 2, so that the outer guide rod 3 on the roller 32 abutment pipe wall of the pipe two 4, axial movement of the outer guide rod 3, rotating bracket 31 to adjust the posture of the welding gun 7 and the distance with the welding intersection line meet the requirements;Finally, through two locking nuts, the outer guide rod 3 and the locking rod 6 is fixedly connected, the outer guide rod 3, the inner guide rod 2 is connected into a detachable whole;

[0052] S5, through the handle or servo motor rotating end plate 11, the roller 22 along the welding intersection line moves, driving the outer guide rod 3, the inner guide rod 2 synchronous rotation, so that the welding gun 7 always along the welding intersection line moves, realize the automatic welding of pipe one 5, pipe two 4. The guiding device of the application, the time of measuring the trajectory of intersection line before welding is saved, the welding efficiency is improved, the use cost is low, the guiding device structure is compact and easy to operate, which is suitable for welding operation in construction site.

[0053] In the description of the present application, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "vertical", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of describing the present application and not for the purpose of requiring the present application to be constructed or operated in a particular orientation, therefore cannot be understood as a limitation on the present application. In the present application, "connected" and "connected" should be understood broadly, for example, it can be connected, or it can be detachable connection;It can be direct connection, or indirect connection through intermediate components. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0054] The above is the preferred embodiment of the present application, the description of the specific examples is only for better understanding the idea of the present application. For ordinary skilled in the art, according to the principle of the present application, several improvements or equivalent replacements can also be made, which are also considered to fall within the scope of protection of the present application.

Claims

1. A guide device for pipe welding, comprising a welding base, characterized in that, It also includes a guide post assembly (1), an inner guide rod (2), and an outer guide rod (3); the guide post assembly (1) includes an end plate (11) and a central post (12); the inner end of the central post (12) extends into the second pipe (4), and the outer end of the central post (12) extends out of the second pipe (4) and connects with the end plate (11); a sliding sleeve (121) is provided along the axial direction of the inner guide rod (2) to abut against the inner wall of the second pipe (4); the inner end of the inner guide rod (2) abuts against the inner wall of the first pipe (5) at the intersection line, and the middle part of the inner guide rod (2) passes through the sliding sleeve (121) and slides; the outer end of the inner guide rod (2) passes through the end plate (11) and connects to one end of the locking rod (6); a first spring (21) is installed between the locking rod (6) and the end plate (11); The outer guide rod (3) is close to the inner guide rod (2) and the outer wall of the second pipe (4). The upper end of the outer guide rod (3) passes through the end plate (11) and is connected to the other end of the locking rod (6). The lower end of the outer guide rod (3) is equipped with a welding gun (7). The first pipe (5) and the second pipe (4) are circular pipes. The first pipe (5) is installed on the welding base. The second pipe (4) is vertically connected to the first pipe (5) along the vertical direction. The end of the outer guide rod (3) is hinged to a bracket (31), and the bracket (31) is provided with mounting holes suitable for the welding torch (7); A roller (32) is sleeved on the outer guide rod (3), and the outer guide rod (3) abuts against the outer wall of the second pipe (4) through the roller (32); The outer guide rod (3) is fitted with a second spring (33), one end of the second spring (33) presses against the end plate (11), and the other end of the second spring (33) presses against the roller (32); A guide cylinder (123) and several positioning cylinders (122) are provided around the central column (12). Positioning springs are provided inside the guide cylinder (123) and the positioning cylinders (122). The guide column assembly (1) includes a positioning column (124) that slides with the positioning cylinder (122). The sliding sleeve (121) is provided with a guide column (125) that slides with the guide cylinder (123). The inner end of the guide column (125) and the inner end of the positioning column (124) are both in contact with the positioning springs. The end plate (11) is provided with a drive shaft for driving the guide device to rotate. The drive shaft is coaxial with the central column (12). The inner end of the inner guide rod (2) is provided with a rotating shaft, and a roller (22) is installed on the rotating shaft. The roller (22) is connected to the rotating shaft through a ball head. The rotating shaft and the locking rod (6) are located on the same side of the inner guide rod (2), and the rotating shaft is parallel to the locking rod (6).

2. The guide device for pipe welding as described in claim 1, characterized in that, The end plate (11) has a first opening groove (111), and the inner guide rod (2) and the outer guide rod (3) abut against the side wall of the first opening groove (111); the locking rod (6) has a second opening groove (61), and the outer guide rod (3) abuts against the side wall of the second opening groove (61).

Images