阅读说明：本技术 一种管道焊接装置及其使用方法 (Pipeline welding device and using method thereof ) 是由 汤毅 于晓民 沈慧华 王金 梁雄 于 2021-09-02 设计创作，主要内容包括：本发明涉及一种管道焊接装置及其使用方法,该装置包括工作平台和固定于工作平台上的焊接组件和对口组件,对口组件包括对口盘和活动安装于对口盘上的四组杆件,每组杆件从下至上依次包括底杆、第一伸缩部、凹进段、第二伸缩部、细伸缩杆及管道夹；第一伸缩部调节底杆和凹进段之间的距离；第二伸缩部调节凹进段和细伸缩杆之间的距离；管道夹固定于细伸缩杆的顶部；对接的上管道和下管道形成的坡口与凹进段的中心位置对应；焊接组件包括焊机、滑动模块、移动小车、伸缩节及自动焊枪,滑动模块上设有第一滑槽,移动小车沿第一滑槽水平移动；自动焊枪通过伸缩节安装于移动小车上。本发明适用于多种管径、材质、高度的管道焊接,且焊接效率高、质量好。(The invention relates to a pipeline welding device and a use method thereof, wherein the device comprises a working platform, and a welding assembly and a butt assembly which are fixed on the working platform, wherein the butt assembly comprises a butt plate and four groups of rod pieces movably arranged on the butt plate, and each group of rod pieces sequentially comprises a bottom rod, a first telescopic part, a concave section, a second telescopic part, a thin telescopic rod and a pipeline clamp from bottom to top; the first telescopic part adjusts the distance between the bottom rod and the concave section; the second telescopic part adjusts the distance between the concave section and the thin telescopic rod; the pipeline clamp is fixed on the top of the thin telescopic rod; the groove formed by the upper pipeline and the lower pipeline which are butted corresponds to the central position of the concave section; the welding assembly comprises a welding machine, a sliding module, a movable trolley, an expansion joint and an automatic welding gun, wherein the sliding module is provided with a first sliding chute, and the movable trolley horizontally moves along the first sliding chute; the automatic welding gun is arranged on the movable trolley through the expansion joint. The invention is suitable for welding pipelines with various pipe diameters, materials and heights, and has high welding efficiency and good quality.)

1. A pipe welding apparatus, comprising: a working platform, a welding component and a butt joint component, wherein the welding component and the butt joint component are respectively fixed on the working platform,

the butt joint assembly comprises a butt joint disc and four groups of rod pieces movably mounted on the butt joint disc, and each group of rod pieces sequentially comprises a bottom rod, a first telescopic part, a concave section, a second telescopic part, a thin telescopic rod and a pipeline clamp from bottom to top; the first telescopic part is connected with the bottom rod and the concave section and adjusts the distance between the bottom rod and the concave section; the second telescopic part is connected with the concave section and the thin telescopic rod, and the distance between the concave section and the thin telescopic rod is adjusted; the pipeline clamp is fixed at the top of the thin telescopic rod; the groove formed by the upper pipeline and the lower pipeline which are butted corresponds to the central position of the concave section; the pipe clamp is used for clamping the top of the upper pipe;

the welding assembly comprises a welding machine, a sliding module, a movable trolley, an expansion joint and an automatic welding gun, the welding machine and the sliding module are respectively fixed on the working platform, a first sliding groove is formed in the sliding module, and the movable trolley horizontally moves along the first sliding groove; the automatic welding gun is arranged on the movable trolley through the telescopic joint; the welding machine is in signal connection with the automatic welding gun.

2. The pipe welding apparatus of claim 1, wherein the top surface of the aligning disc is provided with cross sliding grooves, the bottom rods are inserted into four second sliding grooves of the cross sliding grooves, respectively, and the aligning assembly further comprises a first control wheel which controls the bottom rods to contract or extend synchronously in the cross sliding grooves along a radial direction.

3. The pipe welding device according to claim 1, wherein a motor is further arranged at the bottom of the aligning disc, and the motor controls the aligning disc to rotate at a constant speed along the central shaft.

4. The pipe welding apparatus of claim 3, wherein the counter plate rotates at a speed of 2 to 30 minutes per revolution.

5. The pipe welding apparatus of claim 3, wherein the rotation angle of the counter plate is 365 ° to 375 °.

6. The pipe welding apparatus of claim 1, wherein the outer surfaces of the bottom bar, the first telescoping portion, the second telescoping portion, the slender rod, and the pipe clamp are coated with noncombustible rubber.

7. The pipe welding apparatus of claim 1, wherein said welding assembly further comprises a second control wheel, said second control wheel controlling movement of said mobile cart within said first chute.

8. The pipe welding apparatus of claim 1, wherein said telescoping section is articulated to said traveling carriage; the automatic welding gun is hinged with the telescopic joint.

9. The pipe welding apparatus of claim 1, wherein said welding assembly further comprises an adjustable bracket mounted between said traveling carriage and said expansion joint.

10. Use of a pipe welding device according to any one of claims 1 to 9, comprising the steps of:

step 1: selecting rod pieces with different sizes according to the types of pipelines to be welded, and respectively fixing bottom rods of the four groups of rod pieces on the contra-aperture disc;

step 2: adjusting the height of the first telescopic part to enable the center of the concave section to be located 0.1-0.3 cm above the lower pipeline;

and step 3: placing the lower pipeline on the counter plate, and adjusting the positions of the four bottom rods on the counter plate to enable the four bottom rods to be in interference fit with the inner surface of the lower pipeline;

and 4, step 4: adjusting the height of the second telescopic part to enable the top end of the thin telescopic rod to be higher than the top end of the upper pipeline;

and 5: placing the upper pipeline on the lower pipeline and aligning the upper pipeline with the lower pipeline, and fixing the upper pipeline by using the pipeline clamp;

step 6: adjusting the movable trolley, the telescopic joint and the automatic welding gun to enable the automatic welding gun to correspond to the position of the concave section;

and 7: starting the welding machine to start welding;

and 8: and after the pipeline welding is finished, moving the automatic welding gun, loosening the pipeline clamp, and repeating the steps 1-7 to start the next section of operation.

Technical Field

The invention relates to the field of electromechanical construction welding, in particular to a pipeline welding device and a using method thereof.

Background

If the two sections of pipelines are welded, the two sections of pipelines need to be butted by using a mouth butting device, and then the two sections of pipelines which are well positioned and fixed are welded by using a welding gun. The mouth aligning device comprises two forms, namely an inner mouth aligning device and an outer mouth aligning device. For the external aligning mode, due to the structural limitation of the external aligning device, a part of welding seams can be shielded, and in order to finish welding, one mode is that after the aligning is finished, a part of the external aligning device (such as the part for shielding the welding seams) is removed, then the one-time welding seam forming of the pipeline is realized, and after the removing, the aligning quality cannot be guaranteed, so that the secondary deflection between the welding seams can be possibly caused; the other mode is welding under the action of an external opening aligning device, the one-time weld joint forming cannot be realized in the mode, the external opening aligning device must be detached after the welding is basically finished, the welding of the shielded part is realized, and the welding quality cannot be guaranteed. For the internal butt joint mode, poor control of welding speed and distance can also occur, so that the welding is not tight, and the welding quality is influenced.

Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a pipe welding apparatus with high welding quality, high efficiency and wide application range and a method for using the same.

Disclosure of Invention

The invention provides a pipeline welding device and a using method thereof, which aim to solve the technical problems.

In order to solve the above technical problem, the present invention provides a pipe welding apparatus, including: work platform, welding subassembly and butt joint subassembly are fixed in respectively on the work platform.

The butt joint assembly comprises a butt joint disc and four groups of rod pieces movably mounted on the butt joint disc, and each group of rod pieces sequentially comprises a bottom rod, a first telescopic part, a concave section, a second telescopic part, a thin telescopic rod and a pipeline clamp from bottom to top; the first telescopic part is connected with the bottom rod and the concave section and adjusts the distance between the bottom rod and the concave section; the second telescopic part is connected with the concave section and the thin telescopic rod, and the distance between the concave section and the thin telescopic rod is adjusted; the pipeline clamp is fixed at the top of the thin telescopic rod; the groove formed by the upper pipeline and the lower pipeline which are butted corresponds to the central position of the concave section; the pipe clamp is used for clamping the top of the upper pipe.

The welding assembly comprises a welding machine, a sliding module, a movable trolley, an expansion joint and an automatic welding gun, the welding machine and the sliding module are respectively fixed on the working platform, a first sliding groove is formed in the sliding module, and the movable trolley horizontally moves along the first sliding groove; the automatic welding gun is arranged on the movable trolley through the telescopic joint; the welding machine is in signal connection with the automatic welding gun.

Preferably, the upper surface of the aligning disc is provided with a cross sliding groove, the bottom rods are respectively inserted into four second sliding grooves of the cross sliding groove, and the aligning assembly further comprises a first control wheel which controls the bottom rods to synchronously contract or extend in the cross sliding groove along the radiation direction.

Preferably, the bottom of the aligning disc is further provided with a motor, and the motor controls the aligning disc to rotate at a constant speed along the central shaft.

Preferably, the rotating speed of the counter plate is 2-30 min/circle.

Preferably, the rotation angle of the contra-aperture disk is 365-375 degrees.

Preferably, the outer surfaces of the bottom rod, the first telescopic part, the second telescopic part, the thin telescopic rod and the pipeline clamp are all wrapped with non-combustible rubber.

Preferably, the welding assembly further comprises a second control wheel that controls movement of the mobile cart within the first chute.

Preferably, the telescopic joint is hinged with the movable trolley; the automatic welding gun is hinged with the telescopic joint.

Preferably, the welding assembly further comprises an adjustable bracket, and the adjustable bracket is mounted between the moving trolley and the telescopic joint.

The invention also provides a using method of the pipeline welding device, which comprises the following steps:

step 1: selecting rod pieces with different sizes according to the types of pipelines to be welded, and respectively fixing bottom rods of the four groups of rod pieces on the contra-aperture disc;

step 2: adjusting the height of the first telescopic part to enable the center of the concave section to be located 0.1-0.3 cm above the lower pipeline;

and step 3: placing the lower pipeline on the counter plate, and adjusting the positions of the four bottom rods on the counter plate to enable the four bottom rods to be in interference fit with the inner surface of the lower pipeline;

and 4, step 4: adjusting the height of the second telescopic part to enable the top end of the thin telescopic rod to be higher than the top end of the upper pipeline;

and 5: placing the upper pipeline on the lower pipeline and aligning the upper pipeline with the lower pipeline, and fixing the upper pipeline by using the pipeline clamp;

step 6: adjusting the movable trolley, the telescopic joint and the automatic welding gun to enable the automatic welding gun to correspond to the position of the concave section;

and 7: starting the welding machine to start welding;

and 8: and after the pipeline welding is finished, moving the automatic welding gun, loosening the pipeline clamp, and repeating the steps 1-7 to start the next section of operation.

Compared with the prior art, the pipeline welding device and the using method thereof provided by the invention have the following advantages:

1. according to the invention, by designing the telescopic structure of the rod piece, the movement of the bottom rod on the butt plate and the horizontal position, height and angle adjustment of the automatic welding gun, the welding device can be suitable for pipeline welding with various pipe diameters, materials (including metal and nonmetal) and heights, and has a wide application range;

2. the device is suitable for welding the annular transverse seam of the outer wall of the pipeline, is also suitable for welding the longitudinal seam and the inner wall of the large-sized pipeline, and further expands the application range;

3. when in welding, the motor at the bottom of the butt joint disc can drive the butt joint disc to automatically rotate so as to realize automatic welding, the rotating speed and the rotating angle are adjustable, and compared with the traditional manual welding, the automatic butt joint disc has the advantages of high efficiency, good welding quality, no restriction of the traditional process, high safety and the like;

4. according to the device, after two sections of short pipes are welded to form a new pipe section, the relay welding of the next section of short pipe on the new pipe section can be realized by adjusting the first telescopic rod and the second telescopic rod, the continuous welding can be realized without taking out the new pipe section formed after welding, and the manufacturing efficiency is improved;

5. the pipeline welding device provided by the invention also has the advantages of easiness in operation, high working efficiency, simple structure and operation and the like.

Drawings

FIG. 1 is a schematic structural diagram of a pipe welding apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram (working state) of a pipeline welding device according to an embodiment of the present invention;

FIG. 3 is a top view of a contra-aperture disk and an automatic welding gun according to one embodiment of the present invention;

fig. 4 is a schematic structural diagram of a pipe welding apparatus according to a second embodiment of the present invention.

In the figure: 001-lower pipe, 002-upper pipe; 100-working platform, 200-aligning component, 210-aligning disk, 211-cross sliding chute, 220-rod piece, 221-bottom rod, 222-first telescopic part, 223-concave section, 224-second telescopic part, 225-thin telescopic rod, 226-pipe clamp, 230-first control wheel, 240-motor, 300-welding component, 310-welding machine, 320-sliding module, 321-first sliding chute, 330-moving trolley, 340-telescopic joint, 350-automatic welding gun, 360-second control wheel and 370-adjustable bracket.

Detailed Description

In order to more thoroughly express the technical scheme of the invention, the following specific examples are listed to demonstrate the technical effect; it is emphasized that these examples are intended to illustrate the invention and are not to be construed as limiting the scope of the invention.

Example one

The pipe welding apparatus provided by the present invention, as shown in fig. 1 to 3, includes: the welding assembly 300 and the butt joint assembly 200 are respectively fixed on the working platform 100.

The aligning assembly 200 comprises an aligning disc 210 and four groups of rod pieces 220 movably mounted on the aligning disc 210, wherein each group of rod pieces 220 sequentially comprises a bottom rod 221, a first telescopic part 222, a concave section 223, a second telescopic part 224, a fine telescopic rod 225 and a pipe clamp 226 from bottom to top; the first telescopic part 222 connects the bottom rod 221 and the concave section 223 and adjusts the distance between the bottom rod 221 and the concave section 223; the second telescopic part 224 connects the concave section 223 and the thin telescopic rod 225, and adjusts the distance between the concave section 223 and the thin telescopic rod 225; the pipe clamp 226 is fixed on the top of the thin telescopic rod 225; the groove formed by the upper pipe 002 and the lower pipe 001 which are butted corresponds to the central position of the concave section 223; the pipe clamp 226 is used to clamp the top of the upper pipe 002.

The welding assembly 300 comprises a welding machine 310, a sliding module 320, a moving trolley 330, an expansion joint 340 and an automatic welding gun 350, wherein the welding machine 310 and the sliding module 320 are respectively fixed on the working platform 100, a first sliding groove 321 is formed in the sliding module 320, and the moving trolley 330 horizontally moves along the first sliding groove 321; the automatic welding gun 350 is mounted on the moving trolley 330 through the telescopic joint 340; the welder 310 is in signal communication with the automated welding torch 350.

By designing the telescopic structure of the rod member 220, the movement of the bottom rod 221 on the aligning disc 210 and the horizontal position, height and angle adjustment of the automatic welding gun 350, the welding device can be suitable for welding pipelines with various pipe diameters, materials (including metal and nonmetal) and heights, and has a wide application range.

Preferably, referring to fig. 3, the upper surface of the counter plate 210 is provided with a cross sliding slot 211, and the cross sliding slot 211 is composed of four second sliding slots with a common connection point (central point). The bottom rods 221 are respectively inserted into the four second sliding grooves of the cross sliding groove 211, the aligning assembly 200 further includes a first control wheel 230, the first control wheel 230 is disposed at a side of the working platform 100, and the first control wheel 230 controls the bottom rods 221 to synchronously contract or extend in the cross sliding groove 211 along a radial direction. Specifically, the second sliding groove is used as a moving track of the bottom rod 221, and the first control wheel 230 is fixedly connected with the four bottom rods 221 respectively, so that the four bottom rods 221 and the attached components on the four bottom rods 221 synchronously slide in four horizontal directions, and then the inward contraction or outward expansion effect is achieved, so as to adapt to the welding of pipelines with different inner diameters.

In this embodiment, with continuing reference to fig. 3, the diameter of the counter plate 210 is 2.4m, the four second sliding slots of the cross sliding slot 211 correspond to four sliding rails, each sliding rail is provided with a key hole, and the four key holes can synchronously slide on the sliding rail in four directions under the action of the first control wheel 230; the key holes are internally provided with internal threads and are in inverted stepped pyramid shapes, the bottom of the rod piece 220 is provided with external threads matched with the internal threads, so that the rod piece 220 can be conveniently fixed in the key holes, wherein the thicker bottom rod 221 is fixed in the key hole of the first step (the uppermost step), and the thinner bottom rod 221 is fixed in the key hole of the last step (the next step). In this embodiment, the bottom rod 221 and the attached first expansion part 222, the concave section 223, the second expansion part 224, the thin expansion joint 225 and the pipe clamp 226 are operated by the first control wheel 230 to move synchronously, so as to be suitable for the butt joint and welding of single-section and multi-section pipes with a pipe diameter of 0.4m to 2 m.

Preferably, the bottom of the counter plate 210 is further provided with a motor 240, and the motor 240 controls the counter plate 210 to rotate at a constant speed along the central axis. Preferably, the rotation speed of the counter plate 210 is 2 minutes/circle to 30 minutes/circle, so as to ensure a uniform welding speed, which is beneficial to releasing welding stress in the process. The rotation angle of the butt-joint plate 210 is 365-375 degrees, and the quality of the initial welded junction is ensured by setting a certain reflow distance.

Preferably, the outer surfaces of the bottom rod 221, the first telescopic part 222, the second telescopic part 224, the thin telescopic rod 225 and the pipe clamp 226 are all wrapped with non-combustible rubber (not shown), so as to prevent the pipe wall from being damaged due to friction with the rod 220 when the pipe is in use.

Specifically, in the alignment disc 210 of the present invention, the height of the bottom rod 221 is 0.1m to 0.5 m; the first telescopic part 222 comprises at most 3 detachable middle-section telescopic rods capable of extending and retracting by 0.4m at most, and similarly, the second telescopic part 224 comprises at most 3 detachable middle-section telescopic rods capable of extending and retracting by 0.4m at most; the height of the thin telescopic rod 225 at the uppermost section is 0-0.3 m, so that the welding of the pipe section with the height of a single section of 0.1-1.5 m is realized, the characteristic of wide application range of the device is realized, and the device can be applied to the automatic welding of a single section of short pipe and can also carry out relay welding on the connected pipe section.

Specifically, the middle-section telescopic rod is of a hollow structure and consists of a middle-section expansion joint and an inner rod, wherein the middle-section expansion joint is generally 0.05m in height, and the maximum expansion distance of the inner rod is 0.4 m; the diameter of the thin telescoping rod 225 is not greater than the diameter of the inner rod in the middle telescoping rod.

In addition, in order to prevent the deformation of the rod member 220 caused by a large amount of heat on the groove (the gap between two sections of pipelines) where the rod member 220 is positioned during welding, the recess distance of the recess section 223 is generally about 3cm, and the minimum distance between the recess section 223 and the weld opening is 5cm because the diameter of the middle section telescopic rod is at least 2cm smaller than that of the bottom rod 221, so that the rod member 220 can be prevented from being damaged by heat to the maximum extent.

Preferably, with continued reference to fig. 3, the welding assembly 300 further comprises a second control wheel 360, wherein the second control wheel 360 controls the movement of the mobile cart 330 in the first sliding chute 321; the telescopic joint 340 is hinged with the movable trolley 330; the automatic welding torch 350 is hinged to the telescopic joint 340. The welding assembly 300 may enable rotation and movement of the automated welding torch 350 in both vertical and horizontal directions to achieve precise alignment of the automated welding torch 350 with the groove during welding. Specifically, the automatic welding gun 350 is attached to the telescopic joint 340, the telescopic joint 340 can be adjusted in the range of 60 degrees horizontally, the lower end of the telescopic joint 340 is connected to the moving trolley 330, the telescopic joint 340 can achieve movement of the automatic welding gun 350 in the range of 1.5m in vertical height, the moving trolley 330 is provided with 2-4 wheel discs (not shown), one half of the wheel discs is fixed in the first sliding groove 321, and movement of the automatic welding gun 350 in the range of 1.2m horizontally can be achieved by operating the second control wheel 360. Preferably, in order to further realize the adjustability of the automatic welding gun 350 and better adapt to the welding of various pipelines at various angles, the automatic welding gun 350 can realize the rotation adjustment within the range of 60 degrees at the fixed end of the automatic welding gun 350, through the design, the automatic welding gun 350 can adjust the welding angle and the welding position, and meanwhile, the heat can be uniformly released through the fixed current output during the welding, so that the reduction of the welding quality and the welding efficiency caused by the limitation of the welding process in the traditional manual welding can be favorably improved.

According to the invention, the telescopic joint 340 capable of adjusting the height and the angle is designed to drive the automatic welding gun 350, and meanwhile, the fixed end of the automatic welding gun 350 can adjust the angle so as to realize overhead welding, flat welding or overhead welding at different angles. During operation, the position and angle of the automatic welding gun 350 are adjusted in the early stage, so that the automatic welding gun 350 is positioned at the center of the groove in the concave section 223. The invention has low cost, simple structure and convenient welding.

The invention also provides a using method of the pipeline welding device, which comprises the following steps:

step 1: selecting rod pieces 220 with different sizes according to the types of pipelines to be welded, and respectively fixing bottom rods 221 of the four groups of rod pieces 220 on the contra-aperture disc 210; preferably, the bottom rods 221 are detachably connected to the matching port plate 210, and the bottom rods 221 with different sizes can be selected for different types of pipes, that is, the bottom rods 221 with different thicknesses can be installed at different positions of the key holes, and the detailed operation can be referred to the above related contents. Here, the first control wheel 230 can be adjusted appropriately to detect whether the first control wheel 230 can normally control each bottom rod 221 to achieve synchronous movement in different directions.

Step 2: the height of the first telescopic part 222 is adjusted to enable the center of the concave section 223 to be located 0.1 cm-0.3 cm above the lower pipeline 001.

And step 3: the lower pipeline 001 is placed on the facing plate 210, the positions of the four bottom rods 221 on the facing plate 210 are adjusted, the four bottom rods 221 are in interference fit with the inner surface of the lower pipeline 001, and the lower pipeline 001 is tightly supported by the four bottom rods 221.

And 4, step 4: the height of the second telescopic part 224 is adjusted so that the top end of the thin telescopic rod 225 is higher than the top end of the upper pipe 002.

And 5: placing the upper pipe 002 on the lower pipe 001 and aligning, and fixing the upper pipe 002 with the pipe clamp 226; specifically, the thin telescopic rod 225 is remotely controlled, so that the upper pipe 002 is clamped by the pipe clamp 226 at the upper end, the pipe is lifted by 0.3-0.5 cm to be reserved as a groove, the center of the concave section 223 is observed to be approximately matched with the center of the groove, and then the upper pipe 002 is clamped and fixed through the pipe clamp 226.

Step 6: the trolley 330, the telescopic joint 340 and the automatic welding torch 350 are adjusted to correspond to the position of the recessed portion 223, and the adjustment can be referred to the above related contents.

And 7: and (3) turning on the motor 240 below the counter plate 210, regulating the speed to the rotating speed and the rotating angle suitable for welding the pipeline to be welded, turning on the welding machine 310, and starting welding.

And 8: and after the pipeline welding is finished, moving the automatic welding gun 350, loosening the pipeline clamp 226, and repeating the steps 1-7 to start the next section of operation.

It should be noted that, after step 8, if the long pipe section steel pipe or the non-metal pipeline is subjected to the next welding operation, the welded pipe section can be slightly lifted by using the simple hoisting device, and after the corresponding middle section telescopic rod is replaced and adjusted, the lower pipe section is placed and the upper short pipe section is placed for welding, so that the welded pipeline is guaranteed to be subjected to relay welding on the premise that the device is not taken out; for the welding of the short pipe section, the relay welding of the next short pipe section can be realized only by dismounting a new middle section telescopic rod in the short pipe section and adjusting the middle section telescopic rod after the short pipe section is welded.

By adopting the method, the problems of low accuracy, low efficiency, high labor intensity, poor safety and the like caused by separate execution of butt joint and welding in the traditional process can be solved.

Example two

Referring to fig. 4, the difference between the first embodiment and the second embodiment is: the welding assembly 300 further comprises an adjustable bracket 370, wherein the adjustable bracket 370 is installed between the moving trolley 330 and the telescopic joint 340. The adjustable support 370 may be used for welding of a weld inside a large pipe. Specifically, the adjustable height of the adjustable support 370 is 2m, and the adjustable distance in the horizontal direction is 0.7 m.

In addition, when welding the inner wall, a plurality of probes (not shown) and/or small dust suction devices (not shown) can be installed above the pipeline or on the adjustable bracket 370, and are respectively used for observing the quality and the progress of the inner welding and removing dust and small welding slag during welding.

In summary, the pipe welding device and the using method thereof provided by the present invention include a working platform 100, a welding assembly 300, and a butt-joint assembly 200, where the welding assembly 300 and the butt-joint assembly 200 are respectively fixed on the working platform 100, the butt-joint assembly 200 includes a butt-joint disc 210 and four sets of rod pieces 220 movably mounted on the butt-joint disc 210, and each set of rod pieces 220 sequentially includes, from bottom to top, a bottom rod 221, a first telescopic portion 222, a recessed section 223, a second telescopic portion 224, a thin telescopic rod 225, and a pipe clamp 226; the first telescopic part 222 connects the bottom rod 221 and the concave section 223 and adjusts the distance between the bottom rod 221 and the concave section 223; the second telescopic part 224 connects the concave section 223 and the thin telescopic rod 225, and adjusts the distance between the concave section 223 and the thin telescopic rod 225; the pipe clamp 226 is fixed on the top of the thin telescopic rod 225; the groove formed by the upper pipe 002 and the lower pipe 001 which are butted corresponds to the central position of the concave section 223; the pipe clamp 226 is used to clamp the top of the upper pipe 002; the welding assembly 300 comprises a welding machine 310, a sliding module 320, a moving trolley 330, an expansion joint 340 and an automatic welding gun 350, wherein the welding machine 310 and the sliding module 320 are respectively fixed on the working platform 100, a first sliding groove 321 is formed in the sliding module 320, and the moving trolley 330 horizontally moves along the first sliding groove 321; the automatic welding gun 350 is mounted on the moving trolley 330 through the telescopic joint 340; the welder 310 is in signal communication with the automated welding torch 350. By designing the telescopic structure of the rod member 220, the movement of the bottom rod 221 on the aligning disc 210 and the horizontal position, height and angle adjustment of the automatic welding gun 350, the welding device can be suitable for welding pipelines with various pipe diameters, materials (including metal and nonmetal) and heights, and has the advantages of wide application range, high welding efficiency and good quality.

It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.