A kind of power plant pipeline system annular welding device

Abstract

The present application relates to the technical field of pipeline welding, in particular to a kind of power plant pipeline system circumferential welding device, including the positioning and clamping group for fixed pipeline, the power plant pipeline system circumferential welding device further includes positioner, the positioner is arranged in the side of positioning and clamping group, and positioner includes movable sliding block, and the upper end of sliding block is equipped with mounting seat by multiple spring telescopic rods.The present application can automatically guide the moving pipeline by the alignment welding group and the circumferential uniform distribution of guide reservation group, and can provide adaptive fine adjustment during the butt joint of two pipelines, real-time feedback to coaxial degree, ensure that the end of two pipelines and support ring are coaxially distributed, without manual repeated calibration, and in the process of alignment, the determination of weld width between two pipelines can also be realized, without using feeler gauge repeatedly detecting and adjusting pipeline spacing, improve the efficiency of pipeline welding.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline welding, in particular to a circumferential welding device for a pipeline system of a thermal power plant. BACKGROUND

[0002] The pipeline system of a thermal power plant is a channel for energy transmission and medium circulation in the power plant. The main and auxiliary equipment of the thermal power plant, such as the boiler, steam turbine, generator, heat exchanger, pump, and dust collector, are connected by pipelines. The pipelines bear the task of transporting key media such as steam, feed water, flue gas, fuel oil, fuel gas, and ash.

[0003] In the prior art, when the pipeline of a thermal power plant is circumferentially welded, the pipeline is first pretreated to ensure that the welding surface meets the requirements. Then, the pipeline is clamped on a clamping device for preliminary positioning. Subsequently, a circumferential automatic welding device is moved to the working position. Then, the two pipelines are aligned, and the welding gap is reserved. Then, the aligned pipelines are fixed on the clamping device. Finally, the circumferential automatic welding device is started to weld the welding gap between the two pipelines. However, in the prior art, in order to ensure the alignment progress, the operator needs to use a gap gauge to detect the gap between the two pipeline ends. Moreover, there is a lack of real-time coaxial feedback. If the gap exceeds the standard, the position of the two pipelines needs to be repeatedly adjusted until the gap is within a reasonable range. Moreover, the gap between the two pipeline ends needs to be repeatedly determined by using a feeler gauge. The alignment operation and the gap reservation operation of the pipeline are performed in two steps, which cannot be automatically connected. As a result, the welding efficiency of the two pipelines is low. Moreover, when batch continuous welding is performed, the alignment and gap reservation operations need to be repeatedly performed for each welding, which increases the consumption of labor.

[0004] Therefore, there is an urgent need to provide a circumferential welding device that can improve the welding efficiency of the pipelines. SUMMARY

[0005] Therefore, it is necessary to provide a circumferential welding device for a pipeline system of a thermal power plant, which aims to solve the problem of low welding efficiency of the pipeline in circumferential welding.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a circumferential welding device for a pipeline system of a thermal power plant, comprising: a positioning and clamping group for fixing the pipeline.

[0007] The circumferential welding device for the pipeline system of the thermal power plant further comprises a position adjusting group, which is arranged on one side of the positioning and clamping group. The position adjusting group comprises a movable sliding block. An installation seat is installed on the upper end of the sliding block through a plurality of spring telescopic rods.

[0008] The circumferential welding device for the pipeline system of the thermal power plant further comprises an alignment and welding group, which is arranged on the position adjusting group. The alignment and welding group comprises a rotating part arranged on the installation seat. A welding part is connected to the rotating part.

[0009] The rotating part comprises a rotatable support ring.

[0010] The pipe system circumferential welding device for the thermal power plant further comprises a guide reservation group, which is provided with a plurality of guide reservation groups and is connected to the support ring in a circumferential uniform manner. The guide reservation group comprises a guide part connected to the support ring, an adjusting part connected to the guide part, and a reservation part connected to the adjusting part.

[0011] The guide part comprises a feeding frame slidingly arranged on the support ring. The feeding frame has a U-shaped structure with an opening facing the axis of the support ring. The end portions of the two side sections of the feeding frame are jointly provided with a guide rod. A rotating opening is formed in the middle portion of the guide rod.

[0012] The reservation part comprises a connecting rod connected to the adjusting part. A baffle is rotatably connected to the middle portion of the connecting rod by means of a torsion spring. The thickness of the baffle gradually increases in the direction from the inside to the outside of the support ring.

[0013] The pipe system circumferential welding device for the thermal power plant further comprises a moving clamping group, which is arranged on the positioning group. The moving clamping group drives the to-be-welded pipes to push against the plurality of guide rods and the baffles of corresponding thickness sections, so that the plurality of guide rods and the baffles move in the direction of the fixed pipes until the baffles are attached to the end portions of the two pipes, and at the same time, the welding ends of the two pipes are simultaneously arranged between the plurality of guide rods.

[0014] Preferably, the positioning group further comprises a guide rail frame installed on the ground. The guide rail frame is slidingly connected to the sliding block. A connecting spring is installed between the sliding block and the guide rail frame.

[0015] Preferably, the alignment welding group further comprises a driving part for driving the rotation of the rotating part.

[0016] Preferably, the moving clamping group comprises a hydraulic push rod installed on the guide rail frame. A clamping part is installed at the moving end of the hydraulic push rod. A moving block is installed at the lower end of the clamping part by means of a plurality of spring support rods. The moving block is slidingly connected to the guide rail frame.

[0017] Preferably, the rotating part further comprises a rotating ring and a gear ring installed on the two sides of the support ring, respectively. An annular guide rail frame is rotatably connected to the outer periphery of the rotating ring. A support plate is installed at the lower end of the annular guide rail frame. The support plate is detachably connected to the mounting seat.

[0018] Preferably, the welding part comprises a mounting frame installed on the outer ring surface of the support ring. The mounting frame has a U-shaped structure with an opening facing the axis of the support ring. A lifting module is installed at the middle section of the mounting frame. A welding module is installed at the moving end of the lifting module.

[0019] Preferably, the driving part comprises two supporting seats symmetrically mounted on the mounting base, and a driving motor is detachably mounted on the two supporting seats, a gear is mounted on an output shaft of the driving motor, and the gear is engaged with the gear ring.

[0020] Preferably, the guiding part further comprises a lead screw threadedly connected to the middle section of the feeding frame, and the lead screw is rotationally connected to the outer annular surface of the supporting ring.

[0021] Preferably, the adjusting part comprises a plurality of limiting holes evenly distributed on the two side sections of the feeding frame, and sliding grooves are formed at opposite ends of the two side sections of the feeding frame, adjusting blocks are slidably connected in the sliding grooves, opposite ends of the two adjusting blocks are fixedly connected to the connecting rod, and clamping members are penetratingly connected to the two adjusting blocks and are insertedly matched with the corresponding limiting holes.

[0022] Preferably, the two ends of the guiding rod are inclined away from the axis of the supporting ring, and a plurality of balls are rotationally connected to the end of the guiding rod close to the axis of the supporting ring.

[0023] In summary, the present application has the following beneficial technical effects: 1. The present application can automatically guide the moving pipe through the alignment welding group and the circumferentially evenly distributed guiding reserved group, and can realize self-adaptive fine adjustment during the butt joint of the two pipes, real-time feedback of the coaxiality, and coaxial distribution of the two pipe ends and the supporting ring, thereby avoiding alignment deviation caused by hard collision, without the need for manual repeated calibration, and the determination of the weld width between the two pipes during one alignment, without the need for repeated detection and adjustment of the pipe spacing using a feeler gauge, and the weld width can also be avoided to be unevenly wide or narrow due to manual estimation, thereby improving the efficiency of pipe welding.

[0024] The guiding reserved group used in the present application can be adjusted according to the wall thickness of the pipe, without the need for detection using multiple feeler gauges, and both the alignment welding group and the guiding reserved group can be adjusted according to the diameter of the pipe, thereby effectively improving the adaptability of the welding device.

[0025] When batch welding is performed, the clamping position of the pipe in the positioning and clamping group and the clamping part does not need to be accurately determined, the positioning group has a certain feeding distance, and the alignment of the two pipes can be realized within a reasonable range, thereby effectively reducing the difficulty of pipe welding and reducing the labor input. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0027] Figure 1 A perspective view of the structure of the first view of the application is shown.

[0028] Figure 2 A perspective view of the structure of the second view of the application is shown.

[0029] Figure 3 A front view of the application is shown.

[0030] Figure 4 A left view of the application is shown.

[0031] Figure 5 A sectional view of the middle A-A is shown. Figure 4

[0032] Figure 6 A perspective view of the structure of the positioning group of the application is shown.

[0033] Figure 7 A perspective view of the structure of the alignment welding group and the guide reservation group of the application is shown.

[0034] Figure 8 A perspective view of the structure of the partial rotation part, the guide part, the adjustment part and the reservation part of the application is shown.

[0035] Figure 9 A working state diagram of the pipe welding of the application is shown.

[0036] Among them, the above-mentioned drawings include the following reference signs: 1, positioning and clamping group; 2, positioning group; 20, sliding block; 21, spring telescopic rod; 22, mounting seat; 23, guide rail frame; 24, connecting spring; 3, alignment welding group; 30, rotating part; 300, support ring; 301, rotating ring; 302, gear ring; 303, annular guide rail frame; 304, support plate; 31, welding part; 310, mounting frame; 311, lifting module; 312, welding module; 32, driving part; 320, support seat; 321, driving motor; 322, gear; 4, guide reservation group; 40, guide part; 400, feeding frame; 401, guide rod; 402, rotating opening; 403, distance adjusting screw; 41, adjustment part; 410, limiting hole; 411, sliding groove; 412, adjustment block; 413, clamping part; 42, reservation part; 420, connecting rod; 421, baffle; 5, moving clamping group; 50, hydraulic push rod; 51, clamping part; 52, spring support rod; 53, moving block. DETAILED DESCRIPTION

[0037] ​In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0038] Referring to Figures 1-4 A kind of power plant pipeline system circumferential welding device, including the positioning and clamping group 1 for fixing pipe.

[0039] Specific work, positioning and clamping group 1 is installed on the ground in working position, positioning and clamping group 1 is the mechanical three-jaw chuck equipment for clamping pipe, it can also be hydraulic ring type holder, electromagnetic chuck (not shown in the figure).

[0040] Referring to Figure 1 、 Figure 2 、 Figure 5 And Figure 6 The power plant pipeline system circumferential welding device further includes the position adjusting group 2 arranged at one side of the positioning and clamping group 1, and the position adjusting group 2 includes a movable sliding block 20, a mounting seat 22 is installed on the upper end of the sliding block 20 through a plurality of spring telescopic rods 21, the position adjusting group 2 further includes a guide rail frame 23 installed on the ground, the guide rail frame 23 is in sliding connection with the sliding block 20, and a connecting spring 24 is installed between the sliding block 20 and the guide rail frame 23.

[0041] Specific work, guide rail frame 23 is fixedly installed on the ground on the clamping side of positioning and clamping group 1 through existing installation equipment, and the fixed guide rail frame 23 limits the sliding block 20 in the working position at the same time.

[0042] Referring to Figure 1 、 Figure 2 、 Figure 5 And Figure 7 The power plant pipeline system circumferential welding device further includes the position adjusting group 2 arranged at one side of the positioning and clamping group 1, and the position adjusting group 2 includes a movable sliding block 20, a mounting seat 22 is installed on the upper end of the sliding block 20 through a plurality of spring telescopic rods 21, the position adjusting group 2 further includes a guide rail frame 23 installed on the ground, the guide rail frame 23 is in sliding connection with the sliding block 20, and a connecting spring 24 is installed between the sliding block 20 and the guide rail frame 23.

[0043] Specific work, the support plate 304 is fixed on the mounting seat 22 through the existing bolt, the support plate 304 supports and limits the annular guide rail frame 303, the annular guide rail frame 303 supports and limits the rotating ring 301, the support ring 300 and the gear ring 302, and the guide rail frame 23 is installed to ensure that the axis of the support ring 300 and the clamping center of the positioning and clamping group 1 are in the same vertical plane.

[0044] Referring to Figure 2 , Figure 5 and Figure 7 , the rotating part 30 is connected with the welding part 31, the welding part 31 comprises a mounting frame 310 mounted on the outer ring surface of the support ring 300, the mounting frame 310 is in U-shaped structure with the opening facing the axis of the support ring 300, the lifting module 311 is mounted in the middle section of the mounting frame 310, and the welding module 312 is mounted at the moving end of the lifting module 311.

[0045] Specific work, the lifting module 311 is positioned by the mounting frame 310 when the support ring 300 is positioned, the lifting module 311 is a existing hydraulic cylinder or electric push rod, the lifting module 311 is connected with the driving source outside, the support ring 300 is provided with a through hole for the welding module 312 to pass through at the welding module 312, the welding module 312 penetrates the through hole, and the welding module 312 is a existing submerged arc automatic welding equipment.

[0046] Referring to Figure 7 and Figure 8 , the pipe system circumferential welding device of the thermal power plant further comprises a plurality of guide reservation groups 4 which are circumferentially and uniformly connected to the support ring 300, the guide reservation group 4 comprises a guide part 40 connected to the support ring 300, the guide part 40 comprises a feeding frame 400 slidingly penetrating the support ring 300, the feeding frame 400 is in U-shaped structure with the opening facing the axis of the support ring 300, guide rods 401 are jointly mounted at the end portions of the two side sections of the feeding frame 400, rotating openings 402 are formed in the middle portions of the guide rods 401, and distance adjusting screws 403 are threadedly connected to the middle sections of the feeding frame 400, and the distance adjusting screws 403 are rotationally connected to the outer ring surface of the support ring 300.

[0047] Referring to Figure 7 and Figure 8 , the two ends of the guide rod 401 are inclined away from the axis of the support ring 300, and a plurality of balls are rotationally connected to the end of the guide rod 401 close to the axis of the support ring 300.

[0048] Specific work, support ring 300 positioning at the same time through the plurality of distance screw 403 will be feeding frame 400 limited in the working position, according to the required welding pipe diameter, in turn rotate the plurality of distance screw 403, distance screw 403 drive corresponding feeding frame 400 to the support ring 300 axis direction movement, feeding frame 400 drive guide rod 401 movement, feeding frame 400 is provided with scale, when feeding frame 400 moves to the corresponding scale, stop rotating distance screw 403, the plurality of guide rod 401 at this time the circumference range with the pipe diameter matching, also can set up distance sensor (not shown in the figure) on the feeding frame 400 to accurately control the distance of feeding frame 400 feeding.

[0049] Referring to Figure 8 , the guide part 40 is connected with the adjusting part 41, the adjusting part 41 includes a plurality of limiting holes 410 which are respectively arranged on the two side sections of the feeding frame 400 and are uniformly distributed, the opposite ends of the two side sections of the feeding frame 400 are provided with sliding grooves 411, the sliding grooves 411 are slidably connected with adjusting blocks 412, the two adjusting blocks 412 are commonly provided with clamping members 413, the clamping members 413 are inserted and matched with the corresponding limiting holes 410, and the clamping members 413 are composed of connecting plates and two limiting rods.

[0050] Referring to Figure 7 and Figure 8 , the adjusting part 41 is connected with the reserved part 42, the reserved part 42 includes a connecting rod 420 which is connected with the adjusting part 41, the opposite ends of the two adjusting blocks 412 are commonly fixedly connected with the connecting rod 420, the connecting rod 420 is rotatably connected with a baffle 421 through a torsion spring, the thickness of the baffle 421 gradually increases in the direction from the inside to the outside of the support ring 300, and a plurality of steel balls for reducing friction are rotatably connected on the two sides of different thickness sections of the baffle 421.

[0051] Specific work, the baffle 421 is provided with different thickness sections, after the position adjustment of the plurality of guide rods 401 is completed, the connecting rod 420 is slidably connected according to the required pipe wall thickness, the connecting rod 420 drives the two adjusting blocks 412 to slide in the corresponding sliding grooves 411, and the connecting rod 420 drives the baffle 421 to move at the same time, when the corresponding thickness section of the baffle 421 moves to the working position, the two limiting rods on the clamping member 413 are penetrated through the corresponding limiting hole 410 and the two adjusting blocks 412, so that the function of limiting the adjusted baffle 421 is realized, and the step is repeated until the plurality of baffles 421 are adjusted.

[0052] Referring to Figure 1 , Figure 2 , Figure 5 and Figure 6The power plant pipeline system ring welding device further comprises a moving clamping group 5 arranged on the position adjusting group 2, the moving clamping group 5 comprises a hydraulic push rod 50 mounted on a guide rail frame 23, a clamping part 51 is mounted on the moving end of the hydraulic push rod 50, a moving block 53 is mounted on the lower end of the clamping part 51 through a plurality of spring supporting rods 52, and the moving block 53 is in sliding connection with the guide rail frame 23.

[0053] In specific work, the hydraulic push rod 50 is connected with an existing driving source, the clamping part 51 is a mechanical three-jaw chuck device used for clamping a pipeline, after the position of the baffle 421 is adjusted, a pipeline to be welded is clamped and fixed on the positioning and clamping group 1, another pipeline is clamped and fixed on the clamping part 51 (as shown in Figure 9 Subsequently, the hydraulic push rod 50 is started, the hydraulic push rod 50 pushes and extrudes the clamping part 51, the clamping part 51 drives the moving block 53 to slide on the guide rail frame 23 through the plurality of spring supporting rods 52, and the clamping part 51 in the moving state drives the pipeline to move towards the reference pipeline, in this process, the pipeline in the moving state first pushes and extrudes the plurality of guide rods 401 and the baffle 421, the plurality of guide rods 401 and the baffle 421 are supported to move the support ring 300, the support ring 300 drives the mounting seat 22 to move through the rotating ring 301, the annular guide rail frame 303 and the support plate 304, the mounting seat 22 drives the sliding block 20 to slide on the guide rail frame 23 through the plurality of spring expansion rods 21 and extrudes the connecting spring 24, when the two ends of the plurality of guide rods 401 are in contact with the welding ends of the two pipelines, the inclined sections on the plurality of guide rods 401 guide the two pipelines, the pipeline in the moving state is adaptively adjusted through the plurality of spring supporting rods 52, and the positions of the plurality of guide rods 401 and the baffle 421 are adaptively adjusted through the plurality of spring expansion rods 21, so that the two pipeline end portions penetrating through the plurality of guide rods 401 are coaxially distributed with the support ring 300, thereby realizing the function of automatic alignment of the two pipelines, the pipeline in the moving state penetrating through the plurality of guide rods 401 continues to move and pushes and extrudes the baffle 421, until the baffle 421 is attached to the end portions of the two pipelines, at this time, the baffle 421 reserves a weld seam between the two pipelines, and the weld seam width is directly limited, the accurate determination of the weld seam between the pipelines is realized in one feeding process, repeated adjustment of the welding interval is not needed, the operation steps before welding are effectively reduced, and the welding efficiency is improved, after the baffle 421 is attached to the end portions of the two pipelines, the work of the hydraulic push rod 50 is stopped.

[0054] Referring to Figure 1 , Figure 2 , Figure 5 and Figure 7The alignment welding group 3 further comprises a driving part 32 for driving the rotating part 30 to rotate, the driving part 32 comprises two supporting seats 320 symmetrically mounted on the mounting seat 22, and the two supporting seats 320 are detachably mounted with a driving motor 321 in common, the output shaft of the driving motor 321 is mounted with a gear 322, and the gear 322 is engaged with the gear ring 302.

[0055] In particular, when the two pipes are aligned, the lifting module 311 is started, the welding head of the welding module 312 is moved to the welding position, the welding module 312 is started, the welding module 312 welds the welding seam, the driving motor 321 is started, the driving motor 321 drives the gear 322 to rotate, the gear 322 drives the gear ring 302 to rotate, the gear ring 302 drives the rotating ring 301 to rotate in the annular guide rail frame 303 through the supporting ring 300, the welding module 312 is driven to rotate along the welding seam by the supporting ring 300 in the rotating state through the mounting frame 310 and the lifting module 311, and the welding seam is welded. It should be noted that the rotating direction of the supporting ring 300 is consistent with the opening direction of the rotating opening 402, the supporting ring 300 in the rotating state drives the plurality of guide rods 401 and the plurality of baffles 421 to rotate, the balls on the guide rods 401 and the steel balls on the baffles 421 both reduce the friction with the pipes, when the baffles 421 move to the welding position for welding, the baffles 421 are forced to rotate along the connecting rod 420 and gradually move out of the two pipes and press the torsional spring, when the supporting ring 300 rotates one round, the welding module 312 completely welds the welding seam, thereby realizing the function of the annular welding of the two pipes.

[0056] When the annular welding of the two pipes is completed, the clamping part 51 and the positioning and clamping group 1 are released from clamping the two pipes after welding, and the welded pipes are moved until the welding end of the pipe for next welding passes through the supporting ring 300, and then the positioning and clamping group 1 is clamped and positioned, at this time, the torsional spring in the extruded state is reset and drives the plurality of baffles 421 to reset, the hydraulic push rod 50 drives the clamping part 51 to reset, and the previous welding steps are repeated to weld the next pipe to be welded with the fixed pipe, until the plurality of pipes are welded, and the annular welding of the pipes is completed.

[0057] In the description of the embodiments of the present application, it should be noted that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified and limited, the term "provided", "mounted", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] In the description of the present application, it should also be noted that, unless otherwise specified and limited, the terms "provided", "mounted", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] The embodiments of the present specific implementation are the preferred embodiments of the present application, and are not limited to the protection scope of the present application, so that any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A circumferential welding device for a thermal power plant pipeline system, comprising a positioning and clamping assembly, characterized in that: The adjustment group is located on one side of the positioning clamping group. The adjustment group includes a movable sliding block, and the upper end of the sliding block is equipped with a mounting base through multiple spring telescopic rods. The alignment welding assembly is set on the adjustment assembly. The alignment welding assembly includes a rotating part set on the mounting base, and a welding part is connected to the rotating part. The rotating part includes a rotatable support ring; The guide reservation group is provided in multiple and circumferentially evenly connected to the support ring. The guide reservation group includes a guide part connected to the support ring, an adjustment part connected to the guide part, and a reservation part connected to the adjustment part. The guide section includes a feed frame that slides through the support ring. The ends of the two side sections of the feed frame are jointly equipped with a guide rod, and a rotation opening is provided in the middle of the guide rod. The reserved part includes a connecting rod connected to the adjustment part. A baffle is rotatably connected to the middle of the connecting rod via a torsion spring. The thickness of the baffle gradually increases from the inside to the outside along the support ring. The movable clamping group is set on the adjusting group. The movable clamping group drives the pipe to be welded to push against multiple guide rods and baffles of corresponding thickness sections, so that the multiple guide rods and baffles move towards the fixed pipe until the baffles fit against the ends of the two pipes. At the same time, the welding ends of the two pipes pass through the multiple guide rods.

2. The circumferential welding device for a thermal power plant pipeline system according to claim 1, characterized in that: The adjustment assembly also includes a guide rail frame installed on the ground, the guide rail frame being slidably connected to the sliding block, and a connecting spring being installed between the sliding block and the guide rail frame.

3. The circumferential welding device for a thermal power plant pipeline system according to claim 1, characterized in that: The alignment welding assembly also includes a drive unit for driving the rotating part to rotate.

4. A circumferential welding device for a thermal power plant pipeline system according to claim 2, characterized in that: The movable clamping assembly includes a hydraulic push rod mounted on a guide rail frame. The movable end of the hydraulic push rod is equipped with a clamping part, and the lower end of the clamping part is equipped with a movable block via multiple spring support rods. The movable block is slidably connected to the guide rail frame.

5. A circumferential welding device for a thermal power plant pipeline system according to claim 3, characterized in that: The rotating part also includes a rotating ring and a toothed ring respectively installed on both sides of the support ring. The outer circumference of the rotating ring is rotatably connected to an annular guide frame. A support plate is installed at the lower end of the annular guide frame. The support plate is detachably connected to the mounting base.

6. A circumferential welding device for a thermal power plant pipeline system according to claim 1, characterized in that: The welding section includes a mounting frame installed on the outer ring surface of the support ring. The mounting frame has a U-shaped structure with its opening facing the axis of the support ring. A lifting module is installed in the middle section of the mounting frame, and a welding module is installed at the moving end of the lifting module.

7. A circumferential welding device for a thermal power plant pipeline system according to claim 5, characterized in that: The drive unit includes two support seats symmetrically mounted on the mounting base. A drive motor is detachably mounted on both support seats. A gear is mounted on the output shaft of the drive motor, and the gear meshes with a gear ring.

8. A circumferential welding device for a thermal power plant pipeline system according to claim 1, characterized in that: The guide section also includes an adjusting screw threaded to the middle section of the feed frame, and the adjusting screw is rotatably connected to the outer ring surface of the support ring.

9. A circumferential welding device for a thermal power plant pipeline system according to claim 1, characterized in that: The adjustment part includes multiple limiting holes that are evenly distributed on the two side sections of the feed frame. Each of the two side sections of the feed frame has a sliding groove at its opposite end. An adjustment block is slidably connected in the sliding groove. The opposite ends of the two adjustment blocks are fixedly connected to the connecting rod. A locking member is inserted through the two adjustment blocks and engages with the corresponding limiting hole.

10. A circumferential welding device for a thermal power plant pipeline system according to claim 1, characterized in that: Both ends of the guide rod are inclined away from the axis of the support ring, and the end of the guide rod closer to the axis of the support ring is rotatably connected to multiple ball bearings.

Images