External aligning device for pipeline welding

Abstract

An external aligning device for pipeline welding relates to the technical field of pipeline aligning welding, a pipeline I and a pipeline II are aligned and welded through an automatic welding robot, and the automatic welding robot is coaxially sleeved at a pipe orifice of the pipeline I; the device comprises a rack and an opposite seam device, the rack comprises a main beam, arc-shaped holding claws capable of holding the pipeline II after being closed are hinged to the two ends of the main beam, and telescopic cylinders III used for driving the arc-shaped holding claws to be opened and closed are installed between the main beam and the arc-shaped holding claws; at least four seam aligning devices used for aligning connectors of the pipeline I and the pipeline II are installed on one side of the rack in the circumferential direction of the pipeline II at intervals. The butt joint device comprises a mounting frame which is correspondingly connected with the rack in a fastening manner, and a telescopic arm used for pressing the pipeline I is obliquely mounted at one end of the mounting frame; during welding operation, the telescopic arms are controlled to be sequentially shortened and retreated in a staggered mode so as to avoid an automatic welding robot, the labor intensity of operators is greatly reduced, and the welding operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline butt welding, in particular to an external butt welding device for pipeline welding. Background Art

[0002] As is known, when laying oil and gas pipelines, two adjacent pipelines need to be welded together; since the diameter of oil and gas pipelines is usually large, a docking device is needed to coaxially position the two pipelines during pipeline welding; the existing docking devices are mainly divided into internal docking devices and external docking devices. Since the internal docking device needs to move along the inner wall of the pipeline, the external docking device needs to be used at the final interface, otherwise the internal docking device cannot be removed;

[0003] The existing external jointing devices are mostly arranged with multiple positioning screws at intervals along the annular direction on one side of the frame, so that the frame is coaxial with the outer wall of one of the pipes, and the other pipe is coaxial with the frame through the screws, so as to achieve the purpose of coaxial positioning of the two pipes; there are many inconveniences in using such external jointing devices; the operator needs to repeatedly adjust the positioning screws to achieve the coaxiality of the two pipes, which is inefficient and labor-intensive for the operator; the positioning screws block the welding path of the automatic welding robot, resulting in the inability to use the automatic welding robot for automatic welding, and the manual welding operation is inefficient; the above defects are problems that need to be solved urgently by those skilled in the art;

[0004] A Chinese patent (publication number: CN115283795A) discloses a pipe external butt welding system; the patent includes a frame, two pipe clamps arranged on the frame, and a welding actuator arranged on the frame and located between the two pipe clamps; the two pipe clamps include a rear pipe clamp for surrounding and positioning the rear pipe and a front pipe clamp for surrounding and positioning the front pipe; the front and rear pipe clamps can realize coaxial clamping of the front and rear pipes, and the pipe clamp adjustment device can adjust the axial end spacing of the front and rear pipes; the patent has a complex structure, is not conducive to later maintenance, and has high use costs. Utility Model Content

[0005] In order to overcome the deficiencies in the background technology, the utility model discloses an external butt joint device for pipeline welding.

[0006] In order to achieve the above utility model purpose, the utility model adopts the following technical solutions:

[0007] An external butt-joint device for pipeline welding is used to butt-jointly weld pipelines I and II by an automatic welding robot, which is coaxially sleeved at the pipe mouth of pipeline I; it comprises a frame and a butt-joint device; the frame comprises a main beam, arc-shaped claws which can hold pipeline II tightly after closing are hinged at both ends of the main beam, and a telescopic cylinder III for driving the arc-shaped claws to open and close is installed between the main beam and the arc-shaped claws; at least four butt-joint devices for aligning the interfaces of pipelines I and II are installed at intervals along the annular direction of pipeline II on one side of the frame; the butt-joint device comprises a mounting frame which is fastened to the frame, a telescopic arm for pressing pipeline I is obliquely installed at one end of the mounting frame, and a telescopic cylinder II for driving the telescopic arm is installed at the other end of the mounting frame.

[0008] Preferably, the ends of the two arc-shaped claws facing away from the frame are provided with pin holes that can correspond to each other, and pins are plugged and connected to the corresponding pin hole positions.

[0009] Preferably, a lifting hole or a lifting lug is provided on the top of the main beam.

[0010] Preferably, the angle between the longitudinal axis of the telescopic arm and the axis of the pipeline I is 30 to 60 degrees.

[0011] Preferably, the telescopic end of the telescopic arm is provided with a slot, in which a roller with a rim capable of contacting pipe I is rotatably connected; or two rollers with rims capable of contacting pipe I and pipe II respectively are rotatably connected in the slot at intervals.

[0012] Preferably, the frame is equipped with 6 to 9 alignment devices for aligning the interfaces of pipeline I and pipeline II.

[0013] Preferably, the seam-aligning device is adjustably connected to the frame.

[0014] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0015] The utility model discloses an external butt-joint device for pipeline welding, which has a simple structure. Pipeline I and pipeline II are butt-jointly welded by an automatic welding robot, which can effectively ensure welding quality and reduce the labor intensity of operators. During butt-joint operation, multiple telescopic cylinders II are controlled to extend synchronously, and telescopic arms are driven to move synchronously. Multiple telescopic arms contact pipeline I, so that pipeline I and pipeline II remain coaxial, which reduces the difficulty of butt-joint operation and improves the efficiency of butt-joint operation. During welding operation, multiple telescopic arms are controlled to shorten and retreat alternately in succession, and it is ensured that at least three telescopic arms can firmly position pipeline I to avoid the automatic welding robot moving along the circumference of pipeline I for welding operation. After the automatic welding robot leaves, the corresponding telescopic arm is extended and reset, and the next telescopic arm is shortened and retreated to avoid the automatic welding robot until the automatic welding robot welds pipeline I and pipeline II into one. The automatic operation greatly reduces the labor intensity of operators and improves the efficiency of welding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the rack;

[0018] Figure 3 It is a structural schematic diagram of the seam-matching device.

[0019] In the figure: 1. frame; 1-1. main beam; 1-2. arc-shaped claws; 1-3. telescopic cylinder III; 1-4. pins; 2. automatic welding robot; 3. seam-matching device; 3-1. mounting frame; 3-2. telescopic arm; 3-3. telescopic cylinder II; 3-4. rollers; 4. pipeline I; 5. pipeline II. DETAILED DESCRIPTION

[0020] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0021] Embodiment 1, in combination with Figures 1 to 3 , an external butt joint device for pipeline welding, which uses an automatic welding robot 2 to butt joint the pipeline I4 and the pipeline II5, and the automatic welding robot 2 is coaxially sleeved at the pipe mouth of the pipeline I4. During welding, the automatic welding robot 2 rotates along the pipeline I4 to weld the pipeline I4 and the pipeline II5 into one; it includes a frame 1 and a butt joint device 3;

[0022] The frame 1 comprises a main beam 1-1, and arc-shaped claws 1-2 are hinged at both ends of the main beam 1-1, which can hold the pipe II5 tightly after closing. A telescopic cylinder III1-3 for driving the arc-shaped claws 1-2 to open and close is installed between the main beam 1-1 and the arc-shaped claws 1-2. When in use, the two arc-shaped claws 1-2 can be controlled to open by controlling the telescopic cylinder III1-3. The frame 1 is hoisted onto the pipe II5 by a lifting device, and then the telescopic cylinder III1-3 is controlled to move to close the two arc-shaped claws 1-2, so that the main beam 1-1 and the two arc-shaped claws 1-2 can embrace the pipe II5, so that the circular cavity surrounded by the main beam 1-1 and the two arc-shaped claws 1-2 is kept coaxial with the pipe II5, and the frame 1 can hold the pipe II5 tightly at the same time;

[0023] At least four seam alignment devices 3 for aligning the interfaces of pipelines I4 and II5 are installed at intervals along the annular direction of pipeline II5 on one side of the frame 1; the seam alignment device 3 comprises a mounting frame 3-1 which is fastened to the corresponding frame 1, a telescopic arm 3-2 for pressing pipeline I4 is obliquely installed at one end of the mounting frame 3-1, and a telescopic cylinder II3-3 for driving the telescopic arm 3-2 is installed at the other end of the mounting frame 3-1, that is, during the docking operation, multiple telescopic cylinders II3-3 are controlled to extend synchronously, driving the telescopic arms 3-2 to move synchronously, and multiple telescopic arms 3-2 contact pipeline I4, so that pipeline I4 and pipeline II5 remain coaxial; during the welding ... driving the telescopic arms 3-2 to move synchronously, driving the telescopic arms 3-2 to move synchronously, driving the telescopic arms 3-2 to move synchronously, driving the telescopic arms 3-2 to contact pipeline I4, and controlling multiple telescopic cylinders II3-3 to extend synchronously, driving the telescopic arms 3-2 to move synchronously, driving the telescopic arms 3-2 to move synchronously, driving the telescopic arms 3-2 to contact pipeline I4, and controlling multiple telescopic cylinders II3-3 to extend synchronously, driving the telescopic arms 3-2 to extend synchronously, driving the tele The arms 3-2 are shortened and retracted alternately, and at least three telescopic arms 3-2 are ensured to be able to firmly position the pipe I4 to avoid the automatic welding robot 2 moving along the circumference of the pipe I4 for welding. After the automatic welding robot 2 leaves, the corresponding telescopic arm 3-2 is extended and reset, and the next telescopic arm 3-2 is shortened and retracted to avoid the automatic welding robot 2 until the automatic welding robot 2 welds the pipe I4 and the pipe II5 into one. As needed, the frame 1 is equipped with 6 to 9 seam alignment devices 3 for aligning the interfaces of the pipe I4 and the pipe II5, which can ensure the firm positioning of the pipe I4 while avoiding the automatic welding robot 2.

[0024] In addition, the seam-aligning device 3 is adjustably connected to the frame 1, that is, the position of the seam-aligning device 3 can be adjusted according to the diameter of the pipeline Ⅰ4 to adapt to pipelines Ⅰ4 of different specifications, thereby improving the scope of application and the practicality.

[0025] Embodiment 2, in combination with Figures 1 to 3 , an external butt joint device for pipe welding, which is different from embodiment 1 in that, on the basis of embodiment 1, the ends of the two arc-shaped claws 1-2 facing away from the frame 1 are provided with pin holes that can overlap correspondingly, and the corresponding pin hole positions are plugged and connected with pins 1-4, that is, when the two arc-shaped claws 1-2 are closed, the pin holes of the two arc-shaped claws 1-2 overlap correspondingly, and the pins 1-4 are inserted into the pin holes to lock the two arc-shaped claws 1-2, so as to prevent the two arc-shaped claws 1-2 from accidentally opening during subsequent operations;

[0026] The top of the main beam 1 - 1 is provided with a lifting hole or a lifting lug, which can facilitate the operation of lifting the frame 1 .

[0027] Embodiment 3, in combination with Figures 1 to 3 , an external butt joint device for pipe welding, based on any one of embodiments 1 to 3, the angle between the longitudinal axis of the telescopic arm 3-2 and the axis of the pipe Ⅰ4 is 30 to 60 degrees; preferably, the angle between the longitudinal axis of the telescopic arm 3-2 and the axis of the pipe Ⅰ4 is 45 degrees, which can firmly locate the position of the pipe Ⅰ4 and keep the pipe Ⅰ4 and the pipe Ⅱ5 coaxial;

[0028] The telescopic end of the telescopic arm 3-2 is provided with a slot, in which a roller 3-4 with a rim that can contact pipe I4 is rotatably connected; or two rollers 3-4 with rims that can contact pipe I4 and pipe II5 respectively are rotatably connected in the slot at intervals, which can prevent the telescopic arm 3-2 from directly contacting and rubbing against pipe I4 and causing damage to pipe I4.

[0029] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. An external butt-joint device for pipe welding, which uses an automatic welding robot (2) to butt-jointly weld pipe I (4) and pipe II (5), wherein the automatic welding robot (2) is coaxially sleeved at the pipe mouth of pipe I (4); wherein the device is characterized by: The invention comprises a frame (1) and a seam alignment device (3); the frame (1) comprises a main beam (1-1), arc-shaped claws (1-2) are hingedly connected at both ends of the main beam (1-1) and can hold a pipe II (5) tightly after closing, and a telescopic cylinder III (1-3) for driving the arc-shaped claws (1-2) to open and close is installed between the main beam (1-1) and the arc-shaped claws (1-2); at least four seam alignment devices (3) for aligning the interfaces of pipes I (4) and pipes II (5) are installed at intervals along the annular direction of pipe II (5) on one side of the frame (1); the seam alignment device (3) comprises a mounting frame (3-1) fixedly connected to the frame (1), a telescopic arm (3-2) for pressing pipe I (4) is obliquely installed at one end of the mounting frame (3-1), and a telescopic cylinder II (3-3) for driving the telescopic arm (3-2) is installed at the other end of the mounting frame (3-1).

2. The outer butt joint device for pipe welding according to claim 1, characterized in that: The ends of the two arc-shaped claws (1-2) facing away from the frame (1) are provided with pin holes that can correspond and overlap, and the corresponding pin hole positions are connected with pins (1-4) for plugging and unplugging.

3. The outer butt joint device for pipe welding according to claim 1, characterized in that: The top of the main beam (1-1) is provided with a lifting hole or a lifting lug.

4. The outer butt joint device for pipe welding according to claim 1, characterized in that: The included angle between the longitudinal axis of the telescopic arm (3-2) and the axis of the pipeline I (4) is 30 to 60 degrees.

5. The outer butt joint device for pipe welding according to claim 1, characterized in that: The telescopic end of the telescopic arm (3-2) is provided with a slot, in which a roller (3-4) is rotatably connected and has a rim capable of contacting the pipe I (4); or two rollers (3-4) are rotatably connected and have rims capable of contacting the pipe I (4) and the pipe II (5) at intervals in the slot.

6. The outer butt joint device for pipe welding according to claim 1, characterized in that: The frame (1) is equipped with 6 to 9 seam alignment devices (3) for aligning the interfaces of pipeline I (4) and pipeline II (5).

7. The outer butt joint device for pipe welding according to claim 1, characterized in that: The seam-aligning devices (3) are respectively connectable to the machine frames (1) in an adjustably manner.

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