Online Pipe Alignment and Adjustment Method

Abstract

The present invention relates to the field of pipeline installation and discloses an on-line pipe alignment adjustment method. The on-line pipe alignment device adopted by this method includes a frame, a first telescopic structure and a second telescopic structure. In this method, the rollers of the first telescopic structure move along the axial direction of the first pipe fitting, so that the fixed support structure of the second telescopic structure moves synchronously with the second pipe fitting, adjusting the axial relative position between the first pipe fitting and the second pipe fitting, adjusting the first telescopic structure and / or the second telescopic structure, and adjusting the axial relative position between the first pipe fitting and the second pipe fitting to achieve the alignment of the first pipe fitting and the second pipe fitting; after the alignment is completed, the first pipe fitting and the second pipe fitting are preliminarily fixed, and then the pipe support structure of the second telescopic structure is replaced with rollers, and the on-line pipe alignment device is moved along the pipeline by the rolling of the rollers. It can not only achieve radial stable adjustment between pipelines, but also achieve axial stable adjustment through the cooperation of the rollers and the fixed support structure with the two pipelines respectively.

Description

Technical Field

[0001] The present invention relates to the field of pipeline installation, and in particular to a method for on-line alignment and adjustment of pipelines. Background Art

[0002] In the field of metallurgical construction and other related industries, the pipeline system is an essential process system for achieving process purposes. In the installation of pipeline systems, connections of pipelines often occur, and most of the pipeline connections use concentric and co-bottom pipeline joints. Due to the slope of the pipeline joints, in the alignment of pipelines, traditional alignment methods generally use manual methods for manual adjustment, and it is relatively difficult to control the misalignment amount and alignment deviation.

[0003] The patent application with the publication number CN208600969U discloses a reducing pipe alignment device, which includes a pipe hoop body. Three L-shaped positioning frames extending radially outward along the outer circumference of the pipe hoop body and a plurality of first locking bolts radially passing through the pipe hoop body are evenly arranged on the outer circumference of the pipe hoop body. A second locking bolt for locking the reducing pipe is arranged radially along the pipe hoop body on the L-shaped positioning frame. During the on-site pipeline installation process, the pipe hoop body is sleeved on the small-diameter pipeline, and the pipe hoop body is locked with the pipeline by the first locking bolt. The second locking bolt on the L-shaped positioning frame locks the large-diameter pipeline to be aligned, and is locked with the second locking bolt. That is, after positioning the aligned pipelines with this device, welding and installation are carried out. Although such a reducing pipe alignment device can achieve radial alignment adjustment between pipelines, it is difficult to stably perform axial adjustment. In addition, after the adjustment is in place, the alignment device needs to be removed and reinstalled when used next time. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for on-line alignment and adjustment of pipelines, which can simultaneously achieve stable axial and radial adjustment of pipelines.

[0005] The on-line pipeline alignment and adjustment method disclosed by the present invention uses an on-line pipeline alignment device including a frame, a first telescopic structure, and a second telescopic structure. The first telescopic structure and the second telescopic structure are connected to the frame, and pipeline support structures are respectively arranged at the inner ends of the first telescopic structure and the second telescopic structure. It is characterized in that the pipeline support structure arranged on the first telescopic structure is a roller, and the pipeline support structure of the second telescopic structure includes replaceable rollers and fixed support structures, and the rollers and the fixed support structures are respectively detachably connected to the second telescopic structure;

[0006] The on-line pipeline alignment and adjustment method includes the following steps:

[0007] Install the on-line pipeline alignment device at the interface of the pipelines to be aligned;

[0008] Adjust the telescopic length of the first telescopic structure so that the rollers of the first telescopic structure support on the first pipe fitting;

[0009] Replace the pipe support structure of the second telescopic structure with a fixed support structure. Adjust the telescopic length of the second telescopic structure so that the fixed support structure of the second telescopic structure supports on the second pipe fitting, and the fixed support structure and the second pipe fitting are connected into an adjustable body;

[0010] Through the axial movement of the rollers of the first telescopic structure along the first pipe fitting, make the fixed support structure of the second telescopic structure move synchronously with the second pipe fitting, adjust the axial relative position between the first pipe fitting and the second pipe fitting, adjust the first telescopic structure and / or the second telescopic structure, and adjust the axial relative position between the first pipe fitting and the second pipe fitting to realize the pairing of the first pipe fitting and the second pipe fitting;

[0011] After the pairing is completed, preliminarily fix the first pipe fitting and the second pipe fitting, and then replace the pipe support structure of the second telescopic structure with rollers, and use the rolling of the rollers to move the pipeline on-line pairing device along the pipeline.

[0012] Preferably, the second pipe fitting is a reducing socket;

[0013] The fixed support structure of the second telescopic structure is a surface seat, and the surface seat includes an inverted U-shaped bracket and a seat body. The two sides of the inverted U-shaped bracket are side plates that can be elastically deformed by extrusion, and a locking bolt is connected between the two side plates. The seat body includes a bottom plate and a vertical connecting shaft connected to the bottom plate, and the vertical connecting shaft is hinged to the locking bolt;

[0014] When making the fixed support structure of the second telescopic structure support on the second pipe fitting, adjust the angle of the bottom plate of the surface seat to match the slope of the surface of the reducing socket, and tighten the locking bolt to make the two side plates elastically deform and extrude the vertical connecting shaft to fix the angle of the bottom plate.

[0015] Preferably, the bottom plate is a permanent magnet.

[0016] Preferably, a rubber pad is provided between the vertical connecting shaft and the side plate of the U-shaped bracket.

[0017] Preferably, the frame includes at least two ring units, each ring unit contains at least three adjustable arc-shaped pieces, arc-shaped long holes are opened along the arc direction on the adjustable arc-shaped pieces, and the adjustable arc-shaped pieces in the same ring unit are connected through the arc-shaped long holes by locking connectors to form an annular structure. At least 3 connecting rods are connected between the ring units in the circumferential direction, and the first telescopic structure and the second telescopic structure are arranged on the connecting rods;

[0018] When installing the on-line pipe butt-welding device at the pipe joint to be butted, the ring unit is sleeved on the pipes being butted online. Adjust the adjustable arc pieces of the ring unit according to the size of the butted pipe diameter, so as to adjust the size of the ring unit, make the size of the ring unit match the size of the pipe diameter, and use the locking connecting piece between the adjustable arc pieces to lock the relative positions of the adjustable arc pieces.

[0019] Preferably, the connecting rod passes through the adjacent adjustable arc pieces of the ring unit at the same time and is connected with a locking nut, serving as the locking connecting piece between the adjustable arc pieces.

[0020] Preferably, the connecting rod is provided with an adjustment groove along its length direction. At least one first telescopic structure and at least one second telescopic structure are connected in the adjustment groove of each connecting rod through a locking structure;

[0021] After installing the on-line pipe butt-welding device at the pipe joint to be butted, keep the pipe support structure of the second telescopic structure as a roller, and adjust the positions of the first telescopic structure and the second telescopic structure along the adjustment groove of the connecting rod, so that the first telescopic structure correctly corresponds to the first pipe fitting and the second telescopic structure correctly corresponds to the second pipe fitting.

[0022] Preferably, the first telescopic structure and the second telescopic structure include a threaded rod and a height adjustment nut. The threaded rod is inserted into the adjustment groove, and height adjustment nuts are respectively connected to the upper and lower sides of the connecting rod for the threaded rod.

[0023] Preferably, a third telescopic structure is arranged between the first telescopic structure and the second telescopic structure, and a butt joint gap ruler is arranged at the inner end of the third telescopic structure;

[0024] Before adjusting the axial relative positions of the first pipe fitting and the second pipe fitting, adjust the radial telescopic amount of the third telescopic structure so that the butt joint gap ruler is inserted between the first pipe fitting and the second pipe fitting;

[0025] When adjusting the axial relative positions of the first pipe fitting and the second pipe fitting, control the gap between the first pipe fitting and the second pipe fitting through the butt joint gap ruler.

[0026] Preferably, the butt joint gap ruler includes a plurality of step structures stacked in sequence according to width, and the width of the step structure gradually decreases from the direction close to the third telescopic structure to the direction far from the third telescopic structure;

[0027] By clamping the control step structure with the corresponding width between the pipe walls of the first pipe fitting and the second pipe fitting, control the gap between the first pipe fitting and the second pipe fitting.

[0028] The beneficial effects of the present invention are as follows: The online pipe alignment and adjustment method of the present application can not only achieve radial stable adjustment between pipes to ensure the coaxiality of the pipes, but also achieve axial stable adjustment through the cooperation of the rollers and the fixed support structure with the two pipes respectively to ensure the butt joint gap between the pipes, which is beneficial to subsequent welding; after the alignment is completed, there is no need to disassemble. Only by replacing the fixed support structure with a roller, the alignment device can be moved along the pipe for the alignment of the next pipe butt joint, saving the disassembly and assembly time. The present application can be applied not only to the alignment between pipes of the same diameter, but also to the alignment between pipes of different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is the overall schematic diagram of the present application;

[0030] Figure 2 is Figure 1 the enlarged view of I in

[0031] Figure 3 is Figure 1 the enlarged view of II in

[0032] Figure 4 is Figure 1 the enlarged view of III in

[0033] Figure 5 is Figure 1 the enlarged view of IV in

[0034] Reference numerals: large-diameter pipe 1, large and small pipe joints 2, small-diameter pipe 3, adjustable arc piece 4, connecting rod 5, threaded rod 6, roller 7, inverted U-shaped bracket 8, seat body 9, gap ruler 10, locking nut 11, connecting nut 12, rubber pad 13, height adjustment nut 14, locking bolt 15. DETAILED DESCRIPTION OF THE INVENTION

[0035] The present invention will be further described below.

[0036] As Figure 1 shown, for the online pipe alignment and adjustment method, the online pipe alignment device used includes a frame, a first telescopic structure and a second telescopic structure. The first telescopic structure and the second telescopic structure are connected to the frame. Pipe support structures are respectively arranged at the inner ends of the first telescopic structure and the second telescopic structure. The pipe support structure arranged on the first telescopic structure is a roller 7. The pipe support structure of the second telescopic structure includes a roller 7 and a fixed support structure that can be replaced with each other. The roller 7 and the fixed support structure are respectively detachably connected to the second telescopic structure;

[0037] The specific structures of the frame, the first telescopic structure, and the second telescopic structure can refer to existing pipe alignment devices, such as the alignment device described in the background art. The online pipe alignment adjustment method includes the following steps:

[0038] Install the online pipe alignment device at the interface of the pipes to be aligned;

[0039] Adjust the telescopic length of the first telescopic structure so that the roller 7 of the first telescopic structure supports on the first pipe fitting;

[0040] Replace the pipe support structure of the second telescopic structure with a fixed support structure, and adjust the telescopic length of the second telescopic structure so that the fixed support structure of the second telescopic structure supports on the second pipe fitting, and the fixed support structure and the second pipe fitting are connected into an adjustable body;

[0041] Through the axial movement of the roller 7 of the first telescopic structure along the first pipe fitting, make the fixed support structure of the second telescopic structure move synchronously with the second pipe fitting, adjust the axial relative position between the first pipe fitting and the second pipe fitting, adjust the first telescopic structure and / or the second telescopic structure, and adjust the axial relative position between the first pipe fitting and the second pipe fitting to achieve the alignment of the first pipe fitting and the second pipe fitting;

[0042] After the alignment is completed, preliminarily fix the first pipe fitting and the second pipe fitting, and then replace the pipe support structure of the second telescopic structure with a roller 7, and use the rolling of the roller 7 to move the online pipe alignment device along the pipe.

[0043] The first telescopic structure and the second telescopic structure can adopt various existing telescopic structures such as pneumatic and electric ones, but the structure of the threaded telescopic structure is the simplest and easiest to implement. The fixed support structure is relative to the roller, and it is relatively fixed to the corresponding pipe and does not move relatively. Specifically, it can be a seat body or the end of the telescopic structure.

[0044] This application can be used for the alignment of pipes with the same diameter, and can also be used for the alignment of pipes with different diameters. When aligning pipes with different diameters, it is usually necessary to connect the large and small pipe joints 2. To stabilize the docking of the large and small pipe joints 2, in the preferred embodiment of this application, the fixed support structure of the second telescopic structure is a table base. The table base includes an inverted U-shaped bracket 8 and a base body 9. The two sides of the inverted U-shaped bracket 8 are side plates that can be elastically deformed by extrusion. A locking bolt 15 is connected between the two side plates. The base body 9 includes a bottom plate and a vertical connecting shaft connected to the bottom plate. The vertical connecting shaft is hinged to the locking bolt 15; the bottom plate is used to directly contact the surface of the large and small pipe joints 2. The vertical connecting shaft is hinged to the locking bolt 15, and the bottom plate is connected to the vertical connecting shaft. Therefore, the bottom plate can rotate around the locking bolt 15 to achieve angle adjustment and adapt to the surface slope of the large and small pipe joints 2. The side plates can usually be made of thin steel plates to achieve the purpose of elastic deformation. By tightening the locking bolt 15 to lock the side plates and forcing them to deform, the angle of the bottom plate can be locked. A rubber pad 13 can be provided between the vertical connecting shaft and the side plate of the U-shaped bracket to prevent sliding during locking.

[0045] Let the second pipe fitting be the large and small pipe joints 2; when the fixed support structure of the second telescopic structure supports on the second pipe fitting, adjust the angle of the bottom plate of the table base to adapt to the surface slope of the large and small pipe joints 2, and tighten the locking bolt 15 to make the two side plates elastically deform and squeeze the vertical connecting shaft to fix the angle of the bottom plate.

[0046] For pipes such as steel pipes that can be magnetically adsorbed, in the preferred embodiment of this application, the bottom plate is a permanent magnet. The bottom plate of the permanent magnet can directly adsorb on the surface of the steel pipe, thereby improving the stability of the support connection.

[0047] Although the length adjustment function of the first telescopic structure and the second telescopic structure can match pipes with different diameters to a certain extent, their telescopic lengths are relatively limited, and excessive telescoping will also affect the stability of the support. Therefore, in the preferred embodiment of this application, the frame includes at least two ring units. Each ring unit contains at least three adjustable arc-shaped pieces 4. An arc-shaped long hole is provided along the radial direction of the adjustable arc-shaped piece 4. The adjustable arc-shaped pieces 4 in the same ring unit are connected through the arc-shaped long holes by locking connecting pieces to form a ring structure. At least three connecting rods 5 are connected between the ring units in the circumferential direction. The first telescopic structure and the second telescopic structure are arranged on the connecting rods 5; among them, the number of adjustable arc-shaped pieces 4 included in each ring unit can be adjusted according to actual needs. At least 3 pieces are required to achieve the adjustment function. The more the number, the closer it can be guaranteed to be to a circle, but the more the number, the worse the stability. 4 to 6 pieces are a better implementation method, with 4 being the best. The connecting rods 5 cooperate with the first telescopic structure and the second telescopic structure thereon to support the pipe. Therefore, more than 3 are required to achieve stable support in space. The best implementation method is usually also 4.

[0048] When installing the on-line pipe pairing device at the pipe interface to be paired, the ring unit is sleeved on the pipes to be paired on-line. The adjustable arc piece 4 of the ring unit is adjusted according to the size of the paired pipe diameter, so as to adjust the size of the ring unit, make the size of the ring unit match the size of the pipe diameter, and lock the relative positions of the adjustable arc pieces 4 by the locking connection pieces between the adjustable arc pieces 4.

[0049] The adjustable arc piece 4 can use a single bolt or the like as the locking connection piece. However, as Figure 4 shown, in the preferred embodiment of the present application, the connecting rod 5 passes through the adjacent adjustable arc pieces 4 of the ring unit and is connected with a locking nut 11, serving as the locking connection piece between the adjustable arc pieces 4. That is, the connecting rod 5 not only plays its own role, but also cooperates with the locking nut 11 as the locking connection piece between the adjustable arc pieces 4, which can simplify the structure.

[0050] In order to ensure that the first telescopic structure and the second telescopic structure can accurately correspond to the pipes to be paired, in the preferred embodiment of the present application, the connecting rod 5 is provided with adjustment grooves along the length direction. At least one first telescopic structure and at least one second telescopic structure are connected in the adjustment grooves of each connecting rod 5 through locking structures; after installing the on-line pipe pairing device at the pipe interface to be paired, keeping the pipe support structure of the second telescopic structure as the roller 7, adjusting the positions of the first telescopic structure and the second telescopic structure along the adjustment grooves of the connecting rod 5, so that the first telescopic structure correctly corresponds to the first pipe fitting, and the second telescopic structure correctly corresponds to the second pipe fitting.

[0051] As mentioned above, the first telescopic structure and the second telescopic structure can adopt various telescopic adjustment methods. As Figure 5 shown, in the preferred embodiment of the present application, the first telescopic structure and the second telescopic structure include a threaded rod 6 and a height adjustment nut 14. The threaded rod 6 is inserted into the adjustment groove, and the threaded rod 6 is respectively connected with height adjustment nuts 14 on the upper and lower sides of the connecting rod 5. The telescopic adjustment and locking can be realized by adjusting the upper and lower height adjustment nuts 14, so as to simultaneously realize the movement of the first telescopic structure and the second telescopic structure along the adjustment groove, which helps to simplify the structure.

[0052] The present application can stably realize the axial adjustment between pipes. However, in order to ensure the accuracy of the gap between pipes, in the preferred embodiment of the present application, a third telescopic structure is provided between the first telescopic structure and the second telescopic structure, and a butt gap sizing tool 10 is arranged at the inner end of the third telescopic structure; before adjusting the axial relative positions of the first pipe fitting and the second pipe fitting, adjusting the radial telescopic amount of the third telescopic structure, so that the butt gap sizing tool 10 is inserted between the first pipe fitting and the second pipe fitting; when adjusting the axial relative positions of the first pipe fitting and the second pipe fitting, controlling the gap between the first pipe fitting and the second pipe fitting through the butt gap sizing tool 10.

[0053] The specific structure of the butt gap sizing tool 10 can refer to the existing structures, such as the inclined plane triangular structure, the structure with adjustable width that can be telescopically adjusted horizontally, such as Figure 2 shown. In the preferred embodiment of the present application, the butt gap sizing tool 10 includes a plurality of stepped structures arranged in layers in sequence according to the width, and the width of the stepped structure gradually decreases from the direction close to the third telescopic structure to the direction far from the third telescopic structure; by clamping the stepped structure with the corresponding width between the pipe walls of the first pipe fitting and the second pipe fitting, the gap between the first pipe fitting and the second pipe fitting is controlled. The width of the stepped structure gradually decreases from the direction close to the third telescopic structure to the direction far from the third telescopic structure so that after the pipeline is preliminarily fixed, the butt gap sizing tool 10 can be withdrawn for subsequent welding. The width of the steps can be marked on the stepped structure respectively for easy observation and operation. Although this method is not continuously adjustable compared with the inclined plane triangular structure, it has higher stability and can better ensure the consistency of the circumferential gap.

[0054] As Figure 1 shown, it includes a large-diameter pipe 1, a large and small pipe joint 2, and a small-diameter pipe 3. Taking the connection of the large and small pipe joint 2 to the large-diameter pipe 1 as an example, the specific steps are as follows:

[0055] 1. According to different pipe diameters, adjust the adjustable arc piece 4 on the outer ring so that the diameter of the outer ring formed by the adjustable arc piece 4 is basically matched with the pipe diameter;

[0056] 2. Rotate the locking nut 11 on the connecting rod 5, and use the cooperation of the locking nut 11, the washer, and the connecting rod 5 to clamp the adjustable arc piece 4, thereby forming the basic framework of the alignment device;

[0057] 3. Rotate the height adjustment nut 14 installed on the threaded rod 6, and tighten the height adjustment nut 14 on the threaded rod 6 at a suitable position to lock the threaded rod 6. Using the lower roller 7 of the threaded rod 6 as a fulcrum, fix the adjustment device framework on the installed pipeline;

[0058] 4. Adjust the butt gap sizing tool 10 installed on the connecting rod 5 to move it up and down to effectively control the alignment gap of the pipe orifice;

[0059] 5. Replace the lower module of the threaded rod 6 at the position of the large and small pipe joint 2 with a base with a permanent magnet on the bottom plate;

[0060] 6. According to the size and slope of the installed large and small pipe joint 2, adjust the height of the threaded rod 6, and at the same time match the angle of the bottom plate of the base with the slope of the large and small pipe joint 2. Tighten the locking bolt 15 of the U-shaped bracket to fix the angle of the bottom plate of the base, thereby connecting the large and small pipe joint 2 and the threaded rod 6 into an adjustable body through the base;

[0061] 7. Push the alignment device, and make it move along the axial direction of the first pipe fitting through the roller 7 of the first telescopic structure, so as to drive the large and small pipe connectors 2 to move along the axial direction of the pipeline, making them approach the pipeline butt gap gauge 10 to meet the requirements of the pipeline butt gap;

[0062] 8. Adjust the threaded rod 6 at the position of the large and small pipe connectors 2, and adjust the height adjustment nuts 14 in pairs to make the large and small pipe connectors 2 move along the radial direction of the pipeline, so as to realize the adjustment of the offset and coaxiality between the large and small pipe connectors 2 and the already installed large-diameter pipeline 1;

[0063] 9. Withdraw the pipeline butt gap gauge 10 and spot-weld the large and small pipe connectors 2 for fixation;

[0064] 10. After the large and small pipe connectors 2 are spot-welded and fixed, remove the table base and replace it with the roller 7 to make the alignment device move online along the pipeline.

Claims

1. The on-line pipe butt-joint adjustment method, the on-line pipe butt-joint device used includes a frame, a first telescopic structure and a second telescopic structure. The first telescopic structure and the second telescopic structure are connected to the frame, and pipe support structures are respectively arranged at the inner ends of the first telescopic structure and the second telescopic structure, and it is characterized in that, The pipe support structure provided on the first telescopic structure is a roller (7). The pipe support structure of the second telescopic structure includes a roller (7) and a fixed support structure that are interchangeable. The roller (7) and the fixed support structure are respectively detachably connected to the second telescopic structure; The on-line pipe alignment adjustment method includes the following steps: Install the on-line pipe alignment device at the interface of the pipes to be aligned; Adjust the telescopic length of the first telescopic structure so that the roller (7) of the first telescopic structure supports on the first pipe fitting; Replace the pipe support structure of the second telescopic structure with a fixed support structure, adjust the telescopic length of the second telescopic structure so that the fixed support structure of the second telescopic structure supports on the second pipe fitting, and the fixed support structure and the second pipe fitting are connected into an adjustable body; By moving the roller (7) of the first telescopic structure along the axial direction of the first pipe fitting, the fixed support structure of the second telescopic structure moves synchronously with the second pipe fitting, and the axial relative position between the first pipe fitting and the second pipe fitting is adjusted; adjust the first telescopic structure and / or the second telescopic structure to adjust the axial relative position between the first pipe fitting and the second pipe fitting, and realize the alignment of the first pipe fitting and the second pipe fitting; After the alignment is completed, initially fix the first pipe fitting and the second pipe fitting, then replace the pipe support structure of the second telescopic structure with a roller (7), and use the rolling of the roller (7) to move the on-line pipe alignment device along the pipe; The second pipe fitting is a reducer (2); The fixed support structure of the second telescopic structure is a surface seat, and the surface seat includes an inverted U-shaped bracket (8) and a seat body (9). The two sides of the inverted U-shaped bracket (8) are side plates that can be elastically deformed by extrusion, and a locking bolt (15) is connected between the two side plates. The seat body (9) includes a bottom plate and a vertical connecting shaft connected to the bottom plate, and the vertical connecting shaft is hinged to the locking bolt (15); When the fixed support structure of the second telescopic structure supports on the second pipe fitting, adjust the angle of the bottom plate of the surface seat to be adapted to the surface slope of the reducer (2), and tighten the locking bolt (15) to elastically deform the two side plates to squeeze the vertical connecting shaft and fix the angle of the bottom plate.

2. The on-line pipe alignment and adjustment method according to claim 1, wherein The bottom plate is a permanent magnet.

3. The on-line pipe butt joint adjustment method according to claim 1, characterized in that A rubber pad (13) is provided between the vertical connecting shaft and the side plate of the U-shaped bracket (8).

4. The on-line pipe butt joint adjustment method according to claim 1, characterized in that The frame includes at least two ring units. Each ring unit includes at least three adjustable arc pieces (4). The adjustable arc pieces (4) are provided with arc-shaped long holes along the arc direction. The adjustable arc pieces (4) in the same ring unit are connected through the arc-shaped long holes by locking connectors to form a ring structure. At least three connecting rods (5) are connected between the ring units along the circumferential direction. The first telescopic structure and the second telescopic structure are arranged on the connecting rods (5); When installing the on-line pipe alignment device at the interface of the pipes to be aligned, sleeved the ring unit on the pipes to be aligned on-line, adjust the adjustable arc pieces (4) of the ring unit according to the size of the aligned pipe diameter, so as to adjust the size of the ring unit to match the size of the pipe diameter, and use the locking connectors between the adjustable arc pieces (4) to lock the relative positions of the adjustable arc pieces (4).

5. The on-line pipe alignment and adjustment method according to claim 4, characterized in that The connecting rod (5) passes through adjacent adjustable arc-shaped pieces (4) of the ring unit at the same time and is connected with a locking nut (11), serving as a locking connecting piece between the adjustable arc-shaped pieces (4).

6. The on-line pipe butt joint adjustment method according to claim 4, characterized in that, An adjustment groove is formed in the connecting rod (5) along the length direction, and at least one first telescopic structure and at least one second telescopic structure are connected in the adjustment groove of each connecting rod (5) through a locking structure; After the pipeline on-line butt-welding device is installed at the butt-welding position of the pipeline to be butt-welded, the pipeline support structure of the second telescopic structure is a roller (7). Adjust the positions of the first telescopic structure and the second telescopic structure along the adjustment groove of the connecting rod (5) so that the first telescopic structure correctly corresponds to the first pipe fitting and the second telescopic structure correctly corresponds to the second pipe fitting.

7. The on-line pipe butt joint adjustment method according to claim 6, characterized in that The first telescopic structure and the second telescopic structure include a threaded rod (6) and a height adjustment nut (14). The threaded rod (6) is inserted into the adjustment groove, and height adjustment nuts (14) are respectively connected to the upper and lower sides of the connecting rod (5) by the threaded rod (6).

8. The on-line pipe butt joint adjustment method according to claim 1, characterized in that, A third telescopic structure is arranged between the first telescopic structure and the second telescopic structure, and a butt-welding gap sizing device (10) is arranged at the inner end of the third telescopic structure; Before adjusting the axial relative position of the first pipe fitting and the second pipe fitting, adjust the radial telescopic amount of the third telescopic structure so that the butt-welding gap sizing device (10) is inserted between the first pipe fitting and the second pipe fitting; When adjusting the axial relative position of the first pipe fitting and the second pipe fitting, control the gap between the first pipe fitting and the second pipe fitting through the butt-welding gap sizing device (10).

9. The on-line pipe alignment and adjustment method according to claim 8, characterized in that, The butt-welding gap sizing device (10) includes a plurality of stepped structures stacked in sequence according to the width, and the width of the stepped structure gradually decreases from the direction close to the third telescopic structure to the direction far from the third telescopic structure; Control the gap between the first pipe fitting and the second pipe fitting by clamping the stepped structure with the corresponding width between the pipe walls of the first pipe fitting and the second pipe fitting.

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