A butt welding assembly for rapid welding of industrial boiler container drums

Abstract

The present invention relates to the technical field of pressure vessel body welding, and in particular to a butt welding assembly for realizing rapid welding of an industrial boiler container drum, comprising a first drive bracket, a second drive bracket fixedly provided on one side of the first drive bracket, a left control unit fixedly provided on a connecting seat on the left side of the first drive bracket, a right control unit fixedly provided on a connecting seat on the right side of the second drive bracket, a steel rope group respectively provided between the left control unit and the right control unit, an inner welding assembly installed in the inner cylinder cavity of the drum, and an outer welding assembly installed below the drum. This device adopts the left control unit and the right control unit to drive the steel rope group to rotate, driving the outer welding assembly to rapidly shift and weld along the longitudinal seam of the drum, while the inner welding assembly and the outer welding assembly can operate synchronously to synchronously weld the inner and outer longitudinal seams of the drum; when welding the annular butt joint, the drum and the pipe seat rotate synchronously to cooperate with the outer welding assembly and the inner welding mechanism to realize rapid welding.

Description

Technical Field

[0001] The invention relates to the technical field of pressure vessel body welding, in particular to a positioning welding assembly for realizing rapid welding of an industrial boiler vessel drum. Background Art

[0002] The cylindrical boiler drum is a more common type of industrial boiler container. It is usually welded together by the cylinder, head and numerous pipe seats. It is the core pressure-bearing component of the industrial boiler container. The welding quality of the boiler drum directly affects the boiler's pressure-bearing capacity, sealing and service life.

[0003] The traditional welding process for industrial boiler drums presents numerous challenges. The longitudinal seam welding of the drum and the docking of the drum with the tube socket often rely on manual operation or simple mechanical assistance for alignment. This not only poses difficulties in ensuring alignment accuracy but is also inefficient and prone to docking deviations, resulting in unstable subsequent weld quality. Manual operation is also affected by the worker's skill level and work status, increasing uncertainty in product quality.

[0004] After searching, a patent with patent application number CN202411359390.1 and IPC classification number B23K9 / 00 disclosed a boiler internal and external synchronous welding equipment and process. Its main structure includes a turntable, a movable frame, an extension part, a movable assembly and a welding mechanism arranged on each movable end of the movable assembly. The movable assembly makes the welding ends of the two welding mechanisms close to each other, so that the welding ends of the two welding mechanisms can weld the inside and outside of the boiler body respectively, thereby achieving the purpose of synchronous welding of the inside and outside of the boiler body.

[0005] According to the records of existing boiler internal and external synchronous welding equipment, the traditional transmission method of extending the extension piece into the boiler drum and relying on threaded rods to drive the linear movement of the dual welding guns to drive the welding mechanism to move in opposite directions to achieve welding has the following problems:

[0006] First, this welding structure adopts a cantilevered structure. When the length of the cylindrical boiler is long, it is difficult to ensure the centering effect of the moving components and welding mechanism at the cantilevered end of the extension, and it cannot meet the circumferential welding requirements of the boiler and the pipe seat.

[0007] Second, when the inner diameter of the cylindrical drum is large, the flexural deformation of the threaded rod of the moving assembly will cause the positioning accuracy of the welding gun to decrease, which cannot meet the dynamic path adjustment requirements of long welds.

[0008] Therefore, in order to improve the welding quality and efficiency of the drum of an industrial boiler container and reduce production costs, an innovative butt welding assembly is urgently needed. Summary of the Invention

[0009] The present invention solves one of the above technical problems and adopts the following technical solution: a pair of welding assemblies for realizing rapid welding of the drum of an industrial boiler container, comprising a fixed first driving bracket, a second driving bracket fixedly provided on one side of the first driving bracket, the first driving bracket being used to support the bottom of the cylindrical drum to be welded, the second driving bracket being used to support the bottom of the pipe seat to be welded, a left control unit being fixedly installed on the connecting seat on the left side of the first driving bracket, and a right control unit being fixedly installed on the connecting seat on the right side of the second driving bracket, a steel rope group being respectively provided between the left control unit and the right control unit, two ends of the steel rope group being respectively tensioned and wound around the left control unit and the right control unit on the corresponding side, an internal welding assembly cooperating with the upper steel rope group being installed in the inner drum cavity of the drum, and an external welding assembly fixedly connected to the steel rope group of the lower layer being installed below the drum.

[0010] In any of the above solutions, it is preferred that the first driving bracket cooperates with the second driving bracket to drive the boiler drum and the pipe seat to rotate synchronously along a fixed axis.

[0011] The first driving support includes a plurality of drum roller members arranged on both sides of the drum, the tops of the drum roller members are all in contact with the bottom of the outer wall of the drum, the drum roller members include a horizontally arranged first friction roller, both ends of the roller shaft of the first friction roller are movably inserted into the axial hole of the side support seat on the corresponding side, the bottom of each side support seat is fixedly arranged, and a first external drive motor is fixedly installed on the side support seat on one side of at least one of the first friction rollers, and the first external drive motor is used to drive the first friction roller to rotate and drive the drum fixed axis to rotate.

[0012] The second driving support includes a plurality of tube seat roller members arranged on both sides of the boiler drum, the tops of the tube seat roller members are all in contact with the bottom of the outer wall of the cylindrical tube seat, and the tube seat roller members include a horizontally arranged second friction roller, both ends of the roller shaft of the second friction roller are movably inserted into the axial hole of the side support seat on the corresponding side, and the bottom of each side support seat is fixedly arranged, and a second external drive motor is fixedly installed on the side support seat on one side of at least one of the second friction rollers, and the second external drive motor is used to drive the second friction roller to rotate and drive the tube seat fixed axis to rotate.

[0013] The first external drive motor cooperates with the second external drive motor to achieve synchronous and same-speed rotation of the boiler drum and the pipe seat.

[0014] In any of the above schemes, it is preferred that the external welding assembly cooperates with the internal welding assembly to achieve synchronous welding of the inner and outer sides of the longitudinal seam of the boiler drum and the inner and outer sides of the annular weld at the butt joint of the boiler drum and the pipe seat.

[0015] The upper steel rope group located inside the inner cylinder cavity is used to pass through the middle part of the inner welding assembly and realize circumferential constraint and guidance thereon.

[0016] The lower layer of the steel rope group located below the boiler drum is used to drive the external welding assembly fixedly connected thereto to move along the horizontal axis.

[0017] In any of the above schemes, it is preferred that the left control unit includes a horizontally arranged first winch, and two parallel steel ropes are wound on the rope drum of the first winch, and the upper end of each of the steel ropes extends horizontally to the right and is wound around the right control unit, and the lower end of each of the steel ropes extends horizontally to the right and is wound around the right control unit.

[0018] In any of the above schemes, it is preferred that the right control unit includes a horizontally arranged second winch, and two parallel steel ropes are wound on the rope drum of the second winch, and the upper end of each steel rope extends horizontally to the left and is wound on the rope drum of the left control unit, and the lower end of each steel rope extends horizontally to the left and is wound on the rope drum of the left control unit.

[0019] In any of the above schemes, it is preferred that the steel rope group includes two steel ropes that are arranged in parallel at intervals and closed at both ends, and the head and tail ends of each steel rope are arranged horizontally and detachably fixed to the external welding assembly, and the left and right sides of each steel rope are tightly wound on the corresponding rope drum of the left control unit and the rope drum of the right control unit.

[0020] In any of the above solutions, preferably, a horizontal reversing roller is provided directly below the rope drum of the first hoist and the second hoist, respectively. The front and rear ends of the central axis of the horizontal reversing roller are movably inserted into the rotating holes of the corresponding fixed frame. The horizontal reversing roller is used to guide the two steel ropes at the current position from the vertical direction to the horizontal direction.

[0021] In any of the above schemes, preferably, the external welding assembly includes a lower sliding seat, and the two sides of the bottom of the sliding seat are respectively slidably connected to the ground slide rails at corresponding positions through slide grooves, and the bottoms of the two parallel ground slide rails are fixed on the top of the ground seat, and the left and right end surfaces of the lower sliding seat are detachably connected to the end of the steel rope, and a vertically arranged positioning cylinder group is installed on the top of the lower sliding seat, and a lower welding lifting seat is installed on the top of the positioning cylinder group, and a lower welding lifting seat is installed at the center of the lower welding lifting seat, and the lower welding gun is used in conjunction with external welding, and the welding end of the lower welding gun is arranged facing the longitudinal seam directly below the boiler drum.

[0022] In any of the above schemes, it is preferred that the internal welding assembly includes two axial travel mechanisms arranged inside the inner drum cavity of the boiler drum, the center of the axial travel mechanism is movably sleeved on the outer side walls of the two steel ropes and is used to translate along the length direction of the two steel ropes when working, and the axial travel mechanism moves to the right by its own driving force, which is opposite to the movement direction of the upper steel rope, and a middle tensioning frame is installed between the two axial travel mechanisms, and a planetary circulation unit is installed on the middle tensioning frame, and a plurality of internal welding mechanisms are installed at intervals on the outer side walls of the gear rings of the planetary circulation unit, and the planetary circulation unit realizes fixed-axis rotation with the central axis of the boiler drum and drives the internal welding mechanisms installed on its axial outer side walls to follow, and completes the internal welding of the annular butt joint of the boiler drum and the pipe seat during the fixed-axis rotation of the internal welding mechanism, and completes the internal welding of the boiler drum longitudinal seam when the internal welding mechanism realizes axial translation following the axial travel mechanism.

[0023] The in-position welding assembly for rapid welding of industrial boiler container drums provided by this patent exhibits significant advantages in welding efficiency, quality, equipment adaptability and stability through its unique structural design and coordinated operation of multiple components.

[0024] The specific beneficial effects are as follows:

[0025] 1. Improved Welding Efficiency: This device uses the left and right control units to drive the steel rope group to rotate, driving the external welding assembly to quickly shift and weld along the longitudinal seam of the boiler drum. Simultaneously, the internal and external welding assemblies operate synchronously to weld the internal and external longitudinal seams of the boiler drum. When welding annular butt joints, the boiler drum and pipe seat rotate synchronously to coordinate with the external and internal welding assemblies for rapid welding. In actual welding operations, compared with traditional welding methods, this can significantly shorten welding time and improve production efficiency.

[0026] 2. Guaranteed welding quality: The internal and external welding assemblies move synchronously to weld the longitudinal seam, and the components work closely together during the annular butt weld, effectively reducing welding stress. Furthermore, the planetary rotation unit precisely controls the circular motion trajectory of the internal welding mechanism, while the axial travel mechanism ensures precise longitudinal seam welding position, improving welding quality and ensuring high-quality weld joints.

[0027] 3. Enhanced equipment adaptability: The first and second drive brackets in the device can stably support boiler drums and tube seats of different sizes; the steel rope group serves as a flexible transmission member, and its tension state can be adjusted to adapt to certain structural deformations; the structural design of the internal welding assembly and the external welding assembly enables flexible adjustment of the welding position to meet the welding requirements of boiler drums and tube seats of different specifications, and is particularly suitable for welding large-sized and extra-long boiler drums.

[0028] 4. Improved Equipment Stability and Reliability: Dual output shaft motors and belt drives ensure highly synchronized operation of the two axial travel mechanisms, enhancing the stability of the internal weld assembly's overall movement. Annular grooves on the drive and driven wheels enclose the steel ropes, increasing friction and ensuring more stable and reliable movement of the axial travel mechanisms. Horizontal reversing rollers guide the steel ropes, preventing wear and derailment, and ensuring stable operation. A central tie frame prevents interference between components, enhancing operational reliability.

[0029] 5. Easy Maintenance: The steel rope assembly and external welding assembly are detachably connected, facilitating installation, commissioning, and subsequent maintenance and replacement. The structural design of the axial travel mechanism, external welding assembly, and other components also facilitates inspection, repair, and replacement of each component, reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or components are generally identified by similar reference numerals throughout the drawings. Elements or components in the drawings are not necessarily drawn to scale.

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0032] Figure 2 It is a schematic diagram of the main structure of the present invention.

[0033] Figure 3 It is a schematic diagram of the internal three-dimensional structure of the present invention.

[0034] Figure 4 It is a schematic diagram of the internal structure of the boiler drum of the present invention in the longitudinal seam welding state.

[0035] Figure 5 It is a structural schematic diagram of the internal welding assembly of the present invention in the installed state.

[0036] Figure 6 for Figure 5 Schematic diagram of the main structure of the internal welding assembly.

[0037] Figure 7 It is a schematic diagram of the partial internal three-dimensional structure of the axial travel mechanism of the present invention.

[0038] Figure 8 It is a schematic diagram of a partial internal top view of the axial travel mechanism of the present invention.

[0039] Figure 9 It is a schematic diagram of the three-dimensional structure of the planetary revolving unit and its upper components of the present invention.

[0040] Figure 10 It is a partial side view structural diagram of the planetary revolving unit of the present invention.

[0041] Figure 11 for Figure 10 Schematic diagram of the local three-dimensional structure.

[0042] In the figure, 1. Internal welding assembly; 2. External welding assembly; 3. First friction roller; 4. Side support seat; 5. First external drive motor; 6. Second friction roller; 7. Second external drive motor; 8. First hoist; 9. Second hoist; 10. Horizontal reversing roller; 11. Lower sliding seat; 12. Ground slide rail; 13. Ground seat; 14. Positioning cylinder group; 15. Lower welding lifting seat; 16. Lower welding gun; 17. Middle tie frame; 18. Center box; 19. , upper axle; 20, lower axle; 21, driving wheel; 22, driven wheel; 23, dual output shaft motor; 24, belt drive; 25, radial support cylinder group; 26, guide wheel component; 27, central sun shaft; 28, central drive motor; 29, sun gear; 30, ring gear; 31, planetary gear; 32, planetary carrier; 33, internal welding telescopic cylinder group; 34, internal welding welding gun; 35, steel rope; 36, boiler drum; 37, pipe seat. DETAILED DESCRIPTION

[0043] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only used as examples and are not intended to limit the scope of protection of the present invention. Figures 1-11 As shown in .

[0044] Example 1: A counter-position welding assembly for realizing rapid welding of the drum of an industrial boiler container, comprising a fixedly arranged first drive bracket, a second drive bracket fixedly arranged on one side of the first drive bracket, the first drive bracket being used to support the bottom of a cylindrical drum 36 to be welded, the second drive bracket being used to support the bottom of a pipe seat 37 to be welded, a left control unit being fixedly installed on the connecting seat on the left side of the first drive bracket, and a right control unit being fixedly installed on the connecting seat on the right side of the second drive bracket, a steel rope group being respectively arranged between the left control unit and the right control unit, the two ends of the steel rope group being respectively tensioned and wound around the left control unit and the right control unit on the corresponding side, an internal welding assembly 1 cooperating with the upper steel rope group is installed in the inner drum cavity of the drum 36, and an external welding assembly 2 fixedly connected to the steel rope group of the lower layer is installed below the drum 36.

[0045] The overall design of the counter-position welding assembly in the present invention adopts a circumferentially rotating steel rope 35 as a guide and power traction actuator during the entire welding process. This is significantly different from the traditional rigid transmission. The operation of the left control unit and the right control unit can drive the steel rope group to rotate, so that the external welding assembly 2 that is detachably connected to the lower part can be stably shifted along the length direction of the longitudinal seam of the boiler drum 36. During the shifting process, the longitudinal seam of the boiler drum 36 can be continuously welded by relying on the work of the external welding assembly 2, thereby realizing rapid welding of the external weld.

[0046] In addition, when the external welding assembly 2 moves to the position directly below the joint between the boiler drum 36 and the pipe seat 37, the external welding assembly 2 is controlled to maintain its positioning and working state. By relying on the operation of the first drive bracket and the second drive bracket, the cylindrical boiler drum 36 and the pipe seat 37 in the jointed and tightened state can be driven to rotate on a fixed axis. During the rotation process, since the external welding assembly 2 is in a welding working state, it can continuously weld the joint parts of the cylindrical boiler drum 36 and the pipe seat 37 when they rotate on a fixed axis. After rotating one or more circles, the external annular welding of the current annular joint seam can be completed.

[0047] The welding of the internal longitudinal seam of the boiler drum 36 and the internal welding of the annular seam by means of the internal welding assembly 1 are described as follows: In the present invention, the internal welding assembly 1 is connected to an external power source through an electric wire, so it has an independent function and can be displaced in the axial direction inside the boiler drum 36. During the movement, it relies on its own support for the inner wall of the inner drum cavity and the guidance and restraint of the upper steel rope group inside the inner drum cavity to ensure its stability when moving forward inside, and ensure that it moves forward smoothly in the centered state. During the movement, its running speed is controlled to ensure that the inner side of the longitudinal seam of the boiler drum 36 is welded at the same time during the displacement. When welding the inner longitudinal seam, the current walking speed of the internal welding assembly 1 can be controlled to be the same as the traction speed of the steel rope group. Therefore, the internal welding assembly 1 and the external welding assembly 2 in the traction state can be controlled to maintain the speed of internal and external synchronous movement. In the synchronous movement state, the synchronization when welding the longitudinal seams on the inner and outer sides of the boiler drum 36 can be guaranteed, and internal and external synchronous welding can be guaranteed, thereby effectively reducing welding stress and improving welding efficiency and effect.

[0048] Among them, when the steel rope group is passively pulled and moved, it mainly relies on the drive of the left control unit and the right control unit on both sides. Under the cooperation of the two, the steel rope group can be effectively tensioned, and at the same time, the rope can be retracted and released while maintaining the tension, so that the upper steel rope 35 of the steel rope group can be kept in a horizontal state and continuously shifted to the left, and the lower steel rope 35 of the steel rope group can be kept in a horizontal state and continuously shifted to the right. The upper steel rope 35 maintains a horizontal tensioned state and can act as a horizontal guide rail, which constrains and guides the translation of the inner welding assembly 1 on its outside to prevent it from deviating. During the welding process, the lower steel rope 35 is continuously pulled to the right, which will drive the outer welding assembly 2 fixed at its bottom to move horizontally to the right, thereby ensuring that sufficient traction is provided for the outer welding assembly 2. The cooperation between the inner welding assembly 1 and the outer welding assembly 2 effectively ensures the synchronous internal and external butt welding of the internal welding and the external welding during the entire welding process. Both the longitudinal seam and the annular butt seam can be synchronously butt welded inside and outside, effectively ensuring the high efficiency of the welding process of the large-size and extra-long boiler drum 36.

[0049] The butt welding assembly of the present invention is mainly used for the rapid welding of the drum 36 of an industrial boiler container, including the internal and external welding of the longitudinal seam of the drum 36 and the annular butt seam between the drum 36 and the pipe seat 37. The core of the butt welding assembly is to use the circumferentially rotating steel rope 35 as a guide to work in conjunction with the power traction actuator to achieve efficient and high-quality welding.

[0050] In any of the above solutions, it is preferred that the first driving bracket cooperates with the second driving bracket to drive the boiler drum 36 and the pipe seat 37 to rotate synchronously along a fixed axis.

[0051] The first driving support includes a plurality of drum roller members arranged on both sides of the drum 36, the tops of the drum roller members are all in contact with the bottom of the outer wall of the drum 36, and the drum roller members include a horizontally arranged first friction roller 3, both ends of the roller shaft of the first friction roller 3 are movably inserted into the axial holes of the side support seats 4 on the corresponding sides, and the bottoms of each side support seat 4 are fixedly arranged. A first external drive motor 5 is fixedly installed on the side support seat 4 on one side of at least one of the first friction rollers 3, and the first external drive motor 5 is used to drive the first friction roller 3 to rotate and drive the drum 36 to rotate on a fixed axis.

[0052] The second driving support includes a plurality of tube seat 37 roller members arranged on both sides of the boiler drum 36, and the tops of the tube seat 37 roller members are all in contact with the bottom of the outer wall of the cylindrical tube seat 37. The tube seat 37 roller members include a horizontally arranged second friction roller 6, and both ends of the roller shaft of the second friction roller 6 are movably inserted into the axial hole of the side support seat 4 on its corresponding side. The bottom of each side support seat 4 is fixedly set, and a second external drive motor 7 is fixedly installed on the side support seat 4 on one side of at least one of the second friction rollers 6. The second external drive motor 7 is used to drive the second friction roller 6 to rotate and drive the tube seat 37 to rotate on a fixed axis.

[0053] The first external drive motor 5 cooperates with the second external drive motor 7 to ensure that the drum 36 and the pipe seat 37 rotate synchronously and at the same speed.

[0054] During operation, the first external drive motor 5 is activated, driving the first friction roller 3 to rotate. This friction force drives the drum 36 to rotate about its own axis. Similarly, the second external drive motor 7 drives the second friction roller 6 to rotate, causing the pipe base 37 to rotate about its own axis. By regulating the first and second external drive motors 5 and 7, the drum 36 and pipe base 37 rotate synchronously and at the same speed.

[0055] The first drive bracket and the second drive bracket support the boiler drum 36 and the tube seat 37, and provide power for the rotation of the two when welding the annular joint. They can stably support the boiler drum 36 and the tube seat 37 of different sizes, ensure the synchronous rotation of the two when welding the annular butt joint, cooperate with the external welding assembly 2, achieve uniform welding, and ensure consistent weld quality.

[0056] In any of the above schemes, it is preferred that the external welding assembly 2 cooperates with the internal welding assembly 1 to achieve synchronous welding of the inner and outer sides of the longitudinal seam of the boiler drum 36 and synchronous welding of the inner and outer sides of the annular weld at the butt joint of the boiler drum 36 and the pipe seat 37.

[0057] The upper steel rope group located inside the inner cylinder cavity is used to pass through the middle of the inner welding assembly 1 and realize circumferential constraint and guidance thereon.

[0058] The lower layer of the steel rope group located below the drum 36 is used to drive the external welding assembly 2 fixed thereto to move along the horizontal axis.

[0059] The left and right control units operate, retracting and releasing the ropes to rotate the rope assembly. When the left control unit retracts the ropes, the right control unit releases them, and vice versa. This causes the upper ropes 35 of the rope assembly to shift leftward and the lower ropes 35 to shift rightward, providing guidance and power traction for the inner and outer welding assemblies 1 and 2. Compared to traditional rigid transmissions, the rope assembly acts as a flexible transmission element, achieving smooth and flexible guidance and traction. Its tension is adjustable to accommodate structural deformation, reducing equipment wear and improving reliability.

[0060] It should be noted that when energized, the internal welding assembly 1 is capable of movement. Its base supports the inner wall of the inner drum cavity, maintaining stability, while the upper steel rope group acts as a horizontal guide to constrain its movement. By controlling its travel speed to match the traction speed of the steel rope group, it achieves synchronized movement with the external welding assembly 2 to weld the inner longitudinal seam of the drum 36. This independent shifting function synchronizes well with the external welding assembly 2, enabling simultaneous welding of the inner and outer longitudinal seams of the drum 36, reducing welding stress and improving welding efficiency and quality. The steel rope group provides guidance, adapting to the complex welding environment inside the large and extra-long drum 36.

[0061] When the external welding assembly 2 is operating, the lower steel rope group is pulled rightward by the left and right control units, driving the external welding assembly 2 to move rightward synchronously to weld the external longitudinal seam of the drum 36. When the external welding assembly 2 moves directly below the joint between the drum 36 and the tube seat 37, it remains in position. At this time, the drum 36 and the tube seat 37 rotate, driven by the first and second drive brackets, and the external welding assembly 2 welds the annular butt joint. The secure connection with the steel rope group enables rapid movement and welding along the longitudinal seam. When welding the annular butt joint, it coordinates well with the rotation of the drum 36 and tube seat 37, ensuring a complete and uniform annular weld. This makes it suitable for a variety of welding tasks and improves welding quality and efficiency.

[0062] In any of the above schemes, it is preferred that the left control unit includes a horizontally arranged first winch 8, and two parallel steel ropes 35 are wound on the rope drum of the first winch 8, and the upper end of each of the steel ropes 35 extends horizontally to the right and is wound around the right control unit, and the lower end of each of the steel ropes 35 extends horizontally to the right and is wound around the right control unit.

[0063] When the first hoist 8 is in operation, the rope drum rotates, and the two parallel steel ropes 35 begin to retract and release. When the first hoist 8 retracts the rope, the two steel ropes 35 drive the corresponding components of the right control unit to operate, realizing the turnover of the steel rope group, thereby driving the upper steel rope 35 to shift to the left and the lower steel rope 35 to shift to the right. The first hoist 8 provides a stable and adjustable power source for the steel rope group. By controlling its rotation speed and direction, the movement speed and direction of the steel rope group can be accurately controlled, and then the movement of the internal welding assembly 1 and the external welding assembly 2 can be accurately controlled to ensure that the welding process proceeds according to a predetermined rhythm. The setting of the first hoist 8 makes the power output of the steel rope group more stable and reliable. Compared with some complex and fault-prone transmission devices, the hoist structure is relatively simple, easy to maintain and maintain, and reduces the maintenance cost of the equipment. Moreover, the design of two parallel steel ropes 35 increases the carrying capacity of the steel rope group, which can better adapt to the traction requirements when welding large-sized and extra-long boiler drums 36. At the same time, it improves the stability of the steel rope group operation to a certain extent and reduces problems such as deviation or breakage that may be caused by uneven force on a single steel rope 35.

[0064] In any of the above schemes, it is preferred that the right control unit includes a horizontally arranged second winch 9, and two parallel steel ropes 35 are wound on the rope drum of the second winch 9, and the upper end of each steel rope 35 extends horizontally to the left and is wound on the rope drum of the left control unit, and the lower end of each steel rope 35 extends horizontally to the left and is wound on the rope drum of the left control unit.

[0065] Similarly, the second winch 9 and the first winch 8 echo each other. When the first winch 8 reels in the rope, the second winch 9 releases the rope synchronously, and vice versa. The two parallel steel ropes 35, under the coordinated action of the two winches, achieve smooth turnover of the steel rope group. This coordination makes the movement of the upper steel rope 35 to the left and the lower steel rope 35 to the right more stable and precise. The second winch 9 provides the right control unit with a power output equivalent to the left control unit, ensuring balanced force at both ends of the steel rope group. During the welding process, it can provide guidance and power traction for the internal welding assembly 1 and the external welding assembly 2 more stably. By controlling the speed and direction of the two winches, the operating speed and tension of the steel rope group can be flexibly adjusted to meet the requirements of different welding processes. The setting of the second winch 9 further enhances the reliability of the steel rope group transmission. The symmetrical structural design makes the force of the entire system more uniform, reducing the risk of equipment wear and failure caused by unilateral force. The winding method of the two parallel steel ropes 35 not only increases the load-bearing capacity of the steel rope group, but also improves the stability of the system operation, and can better meet the requirements of high precision and high stability when welding large-sized and extra-long boiler drums 36.

[0066] In any of the above schemes, it is preferred that the steel rope group includes two steel ropes 35 that are arranged in parallel at intervals and closed at both ends, and the head and tail ends of each steel rope 35 are horizontally arranged and detachably fixedly connected to the external welding assembly 2, and the left and right sides of each steel rope 35 are tightly wound on the corresponding rope drum of the left control unit and the rope drum of the right control unit.

[0067] Two spaced, parallel, and closed-ended steel ropes 35 operate like a chain as the rope drums of the left and right control units retract and release the ropes. Because the ropes 35 are detachably fixedly connected to the external welding assembly 2 at both ends, when the left control unit's rope drum retracts and the right control unit's rope drum releases the rope, the ropes rotate, driving the external welding assembly 2 along the longitudinal seam of the drum 36. When welding an annular butt joint, the external welding assembly 2 is positioned directly below the joint. The drum 36 and pipe seat 37 rotate, driven by the first and second drive brackets. The ropes remain taut, ensuring stable operation of the external welding assembly 2.

[0068] The two parallel, spaced steel ropes 35 increase the stability of the overall structure and can better withstand the weight of the external welding assembly 2 and various forces generated during movement compared to a single steel rope 35. The detachable connection facilitates installation, commissioning, and subsequent maintenance and replacement of the equipment.

[0069] In any of the above solutions, preferably, a horizontal reversing roller 10 is provided directly below the rope drums of the first hoist 8 and the second hoist 9. The front and rear ends of the central axis of the horizontal reversing roller 10 are movably inserted into the rotating holes of the corresponding fixed stand, and are used to guide the two steel ropes 35 at the current position to change from the vertical direction to the horizontal direction.

[0070] When the steel rope 35 is released or retracted from the hoist drum, the steel rope 35, which was originally moving in the vertical direction, contacts the horizontal reversing roller 10 and changes direction along the surface of the roller, smoothly reversing to the horizontal direction. During this process, the central axis of the horizontal reversing roller 10 rotates flexibly in the rotating hole of the fixed stand, reducing the friction of the steel rope 35 when it changes direction. The horizontal reversing roller 10 assumes the key steering function, allowing the steel rope 35 to participate in the operation of the steel rope group at a reasonable angle and path. It ensures the continuity of the steel rope 35 when converting between vertical and horizontal directions, and avoids the risk of wear or derailment of the steel rope 35 due to sudden changes in direction. By accurately guiding the direction of the steel rope 35, it is further guaranteed that the internal welding assembly 1 and the external welding assembly 2 can move stably along the predetermined trajectory.

[0071] In any of the above schemes, it is preferred that the external welding assembly 2 includes a lower sliding seat 11, and the two sides of the bottom of the lower sliding seat 11 are respectively slidably connected to the ground slide rails 12 at the corresponding positions through slide grooves, and the bottoms of the two parallel ground slide rails 12 are fixed to the top of the ground seat 13, and the left and right end surfaces of the lower sliding seat 11 are detachably connected to the end of the steel rope 35. A vertically arranged positioning cylinder group 14 is installed on the top of the lower sliding seat 11, and a lower welding lifting seat 15 is installed on the top of the positioning cylinder group 14. A lower welding lifting seat 15 is installed at the center of the lower welding lifting seat 15. The lower welding gun 16 is used in conjunction with external welding, and the welding end of the lower welding gun 16 is arranged to face the longitudinal seam directly below the boiler drum 36.

[0072] Under the traction of the steel rope group, the lower sliding seat 11 moves horizontally along the ground slide rail 12, thereby driving the entire external welding assembly 2 to shift along the longitudinal seam length direction of the boiler drum 36 to perform external longitudinal seam welding. When it is necessary to weld the external annular butt seam at the joint of the boiler drum 36 and the pipe seat 37, the external welding assembly 2 moves to the designated position for positioning. At this time, the positioning cylinder group 14 works and can adjust the height of the lower welding lifting seat 15 according to the welding position requirements, and then adjust the position of the lower welding gun 16 to ensure that the lower welding gun 16 can accurately weld the annular seam. At the same time, the boiler drum 36 and the pipe seat 37 rotate synchronously driven by the first drive bracket and the second drive bracket, and cooperate with the lower welding gun 16 to complete the annular butt seam welding. The cooperation between the lower sliding seat 11 and the ground slide rail 12 provides a stable guide for the movement of the external welding assembly 2, ensuring accurate positioning during the welding process. The detachable connection with the steel rope 35 facilitates installation and maintenance. The arrangement of the positioning cylinder assembly 14 and the lower welding lift 15 allows the lower welding gun 16 to be flexibly adjusted to accommodate welding at various heights and positions, significantly improving the applicability and welding quality of the external welding assembly 2. The adjustable structural design allows for quick adjustment to the optimal welding position when welding different sizes of boiler drums 36 and pipe bases 37, thereby improving welding efficiency.

[0073] In any of the above schemes, it is preferred that the internal welding assembly 1 includes two axial travel mechanisms arranged inside the inner drum cavity of the boiler drum 36, the center of the axial travel mechanism is movably sleeved on the outer side walls of the two steel ropes 35 and is used to translate along the length direction of the two steel ropes 35 when working, and the axial travel mechanism relies on its own driving force to move to the right, which is opposite to the movement direction of the upper steel rope 35. A middle tensioning frame 17 is installed between the two axial travel mechanisms, and a planetary circulation unit is installed on the middle tensioning frame 17. A number of internal welding mechanisms are installed at intervals on the outer side walls of the gear rings of the planetary circulation unit. The planetary circulation unit realizes fixed-axis rotation with the central axis of the boiler drum 36 and drives the internal welding mechanisms installed on its axial outer side walls to follow, and completes the internal welding of the annular butt joints of the boiler drum 36 and the pipe seat 37 during the fixed-axis rotation of the internal welding mechanism, and completes the internal welding of the longitudinal seam of the boiler drum 36 when the internal welding mechanism realizes axial translation following the axial travel mechanism.

[0074] Operating Principle: Axial Translation Welding of Longitudinal Seams: The axial travel mechanism, driven by its own power, moves rightward against the direction of motion of the upper steel rope 35 during operation, driving the connected central tie frame 17, planetary rotation unit, and internal welding mechanism to translate along the length of the steel rope 35. During this process, the internal welding mechanism performs internal welding on the longitudinal seam of the drum 36. For example, during actual welding operations, when the left and right control units rotate the steel rope assembly, causing the upper steel rope 35 to move to the left, the axial travel mechanism, driven by its own power, translates rightward, ensuring that the internal welding mechanism precisely moves along the longitudinal seam of the drum 36 and completes the weld.

[0075] Fixed-axis rotation welding of annular butt joints: When performing internal welding of the annular butt joint between the boiler drum 36 and the pipe seat 37, the planetary revolving unit rotates around the central axis of the boiler drum 36. Because the internal welding mechanism is mounted on the outer wall of the planetary revolving unit's ring gear 30, it rotates in a circular motion around the center of the boiler drum 36, completing the annular internal welding process.

[0076] When welding the annular butt joint between the drum 36 and the pipe seat 37, the inner welding mechanism, the outer welding assembly 2, the first drive bracket, and the second drive bracket work together. The process is as follows:

[0077] The first and second drive brackets drive the rotation of the drum 36 and the pipe base 37. The first drive bracket includes several drum rollers, at least one of which is a first friction roller 3 driven by a first external drive motor 5, thereby driving the drum 36 to rotate about its own axis. The second drive bracket includes several pipe base 37 rollers, at least one of which is a second friction roller 6 driven by a second external drive motor 7, thereby driving the pipe base 37 to rotate about its own axis. By controlling these two motors, the drum 36 and the pipe base 37 rotate synchronously and at the same speed.

[0078] The external welding assembly 2 welds the external annular butt joint: The lower sliding seat 11 of the external welding assembly 2 is detachably connected to the end of the steel rope 35. Driven by the steel rope assembly, it moves to a position directly below the joint between the drum 36 and the pipe seat 37. At this point, the positioning cylinder assembly 14 operates to adjust the height of the lower welding lift 15, aligning the lower welding torch 16 with the external annular butt joint. As the drum 36 and pipe seat 37 rotate, driven by the first and second drive brackets, the lower welding torch 16 welds the external annular butt joint, ensuring a uniform and complete weld.

[0079] The internal welding mechanism welds the internal annular butt joint: The axial travel mechanism of the internal welding assembly 1 drives the central tie frame 17, the planetary rotating unit, and the internal welding mechanism to the vicinity of the joint. The planetary rotating unit rotates about the central axis of the drum 36, driving the internal welding mechanism, mounted on the outer wall of its gear ring 30, in a circular motion around the center of the drum 36. During this process, the internal welding mechanism completes the internal welding of the annular butt joint between the drum 36 and the tube seat 37. This synchronized operation with the external welding assembly 2 reduces welding stress and improves weld quality.

[0080] During the entire synchronous welding process, the various components work closely together, greatly improving the welding efficiency and quality of the annular butt joint between the boiler drum 36 and the pipe seat 37.

[0081] In any of the above schemes, it is preferred that the two axial travel mechanisms are in a synchronous operation state during operation.

[0082] Example 2: Compared with Example 1, this example is different in that it also includes the following technical features:

[0083] In any of the above schemes, it is preferred that the axial travel mechanism includes a central box body 18, and two upper wheel axles 19 arranged horizontally at intervals are installed in the central mounting cavity of the central box body 18, and a lower wheel axle 20 is respectively arranged directly below each of the upper wheel axles 19. The inner and outer ends of each of the upper wheel axles 19 and each of the lower wheel axles 20 are movable through the axial hole on the central box body 18 and extend to the outside thereof, and a driving wheel 21 and a driven wheel 22 are respectively fixed on the outer side wall of the end of each of the upper wheel axles 19 and each of the lower wheel axles 20. The upper driving wheel 21 and the driven wheel 22 directly below it are After matching, the corresponding steel ropes 35 are respectively covered by the annular wheel grooves at the corresponding outer walls. The driving wheel 21 moves to the right along the steel rope 35 by friction when the fixed axis rotates. A dual-output shaft motor 23 is installed in the middle of one of the upper wheel axles 19. The motor housing of the dual-output shaft motor 23 is fixed inside the central mounting cavity. The middle outer walls of the two upper wheel axles 19 are connected by a belt transmission member 24. Radial support guide components are respectively vertically fixed on the top and bottom of the central box body 18, and the ends of each radial support guide component abut against the corresponding inner wall of the boiler drum 36.

[0084] During operation, after the dual-output shaft motor 23 is started, its output shaft drives the upper wheel axle 19 connected to it to start rotating. Since the two upper wheel axles 19 are connected by a belt transmission 24, the rotation of one upper wheel axle 19 will be transmitted through the belt, causing the other upper wheel axle 19 to rotate synchronously. The driving wheel 21 is fixed to the end of the axle, and the rotation of the axle drives the driving wheel 21 to rotate along a fixed axis. During the rotation process, the driving wheel 21 drives the entire axial travel mechanism to move to the right along the steel rope 35 by virtue of the friction between it and the steel rope 35. Since the dual-output shaft motors 23 of the two axial travel mechanisms run synchronously, and the belt transmission ensures the consistency of the axle rotation, the two axial travel mechanisms can operate synchronously, thereby driving the connected middle tie frame 17, the planetary turnover unit and the internal welding mechanism as a whole to stably translate axially within the inner cylinder cavity of the boiler drum 36. At the same time, the radial support and guide components at the top and bottom of the center box 18 always abut against the inner wall of the drum 36 when the axial travel mechanism moves. This not only provides additional support for the axial travel mechanism to prevent it from shaking due to gravity or other external forces during movement, but also plays a precise guiding role, ensuring that the axial travel mechanism moves strictly according to the predetermined axial trajectory to avoid deviation, and ensure that the internal welding mechanism can accurately perform welding operations on the longitudinal seams of the drum 36.

[0085] Its advantages lie in the fact that the combination of the dual-output shaft motor 23 and the belt drive 24 ensures highly synchronized operation of the two axial travel mechanisms. This synchronization is crucial for the stability and consistency of the overall movement of the internal welding assembly 1, significantly improving the quality of the longitudinal seam welds within the drum 36. The design of the drive wheel 21 and the driven wheel 22, which enclose the steel rope 35 through annular grooves, significantly increases the contact area with the rope 35, thereby enhancing friction. This makes the axial travel mechanism more stable and reliable as it moves along the rope 35, adapting to welding requirements under various working conditions, ensuring stable operation both in scenarios requiring high welding speeds and facing complex variations in rope 35 tension. The provision of radial support and guide components further enhances the stability of the axial travel mechanism within the complex and confined environment of the drum 36. While supporting the mechanism's weight, they precisely guide its movement, enabling the internal welding mechanism to accurately weld longitudinal seams within the narrow inner cavity of the drum 36. This is particularly suitable for welding operations within large and extra-long drums 36, effectively ensuring efficient and high-quality welding.

[0086] The driving wheel 21 and the driven wheel 22, through their vertical coordination, play a key role in restraining the movement of the axial travel mechanism within the internal welding assembly 1 along the steel cable 35. Specifically, the upper driving wheel 21 and the lower driven wheel 22 each wrap around the corresponding steel cable 35 through annular grooves in their respective outer walls. When the driving wheel 21 rotates around its axis, it moves rightward along the cable 35 due to friction between it and the cable, while the driven wheel 22 provides auxiliary support and stability from below.

[0087] During this process, the cooperation between the driving wheel 21 and the driven wheel 22 achieves constraints in multiple ways. First, their covering of the steel rope 35 constrains the movement direction of the axial travel mechanism, forcing it to move only along the direction of the steel rope 35 and unable to arbitrarily deviate from the trajectory of the steel rope 35. This ensures that the axial travel mechanism can move precisely along the axial direction of the drum 36, thereby ensuring that the internal welding mechanism accurately welds the longitudinal seam of the drum 36. Second, the driven wheel 22 provides stable support for the driving wheel 21, preventing the driving wheel 21 from bouncing or tilting due to uneven force during rotation, maintaining the stability of the entire axial travel mechanism during movement, which is crucial for ensuring welding quality within the complex environment inside the drum 36.

[0088] In any of the above schemes, it is preferred that the radial support guide component includes a radial support cylinder group 25 fixedly mounted on the middle outer wall of the central box 18, and a guide wheel component 26 is installed at the telescopic end of the radial support cylinder group 25, and the outer side walls of each wheel of the guide wheel component 26 are movably abutted against the inner side wall of the boiler drum 36.

[0089] The axial travel mechanism, relying on its own driving force, moves to the right against the direction of movement of the upper steel rope 35, driving the connected middle tension frame 17, the planetary turnover unit and the internal welding mechanism to translate along the length direction of the steel rope 35. During this process, the radial support cylinder group 25 adjusts the telescopic length according to the inner diameter of the drum 36, so that the guide wheel component 26 always fits tightly against the inner wall of the drum 36, providing stable support and guidance for the axial travel mechanism, and the internal welding mechanism performs internal welding on the longitudinal seam of the drum 36. The radial support guide component provides stable support and guidance during the axial translation process to ensure welding accuracy. The radial support guide component contacts the inner wall of the drum 36 through the guide wheel, further improving the stability and accuracy of the movement of the axial travel mechanism, and is particularly suitable for the internal welding needs of large-sized and extra-long drums 36.

[0090] In any of the above schemes, it is preferred that the planetary circulation unit includes a central sun shaft 27 horizontally arranged in the inner frame of the middle tie frame 17, one end of the central sun shaft 27 is movably inserted into the shaft hole at one end of the middle tie frame 17, and the other end is connected to the output end of the central drive motor 28 fixed on the inner frame side wall of the middle tie frame 17, a sun gear 29 is fixedly installed on the middle outer wall of the central sun shaft 27, a passively rotating ring gear 30 is arranged on the periphery of the sun gear 29, and a number of the internal welding mechanisms are evenly spaced and installed on the outer wall of the ring gear 30, and each of the internal welding mechanisms The working ends are used to complete the inner side welding of the inner wall of the boiler drum 36, the inner wall of the tube seat 37 and the annular connection between the two. A planetary gear 31 is axially engaged between the ring gear 30 and the sun gear 29. The two ends of the planetary wheel shaft of the planetary gear 31 are respectively inserted into the rotating holes of the planetary carrier 32 on the corresponding side. Each of the planetary carriers 32 is respectively fixedly connected to the left and right sides of the middle tie frame 17 to ensure the fixation of the planetary carrier 32. The vertical sections of the two planetary carriers 32 are respectively movably abutted against the corresponding end faces of the ring gear 30 and limit its left and right swing. When the central drive motor 28 is running, the ring gear 30 can be driven to rotate through transmission.

[0091] The central drive motor 28 runs, driving the central sun shaft 27 to rotate, thereby rotating the sun gear 29 fixed on the shaft. The sun gear 29 meshes with the planetary gears 31. Driven by the sun gear 29, the planetary gears 31 revolve around the sun gear 29 while rotating on their own. Since the planetary gears 31 and the ring gear 30 are also meshed with each other, the movement of the planetary gears 31 drives the ring gear 30 to rotate around the central sun shaft 27. The internal welding mechanism installed on the outer wall of the ring gear 30 rotates with the ring gear 30 to weld the annular internal weld at the joint between the drum 36 and the pipe seat 37. During the rotation process, the planetary carrier 32 limits the left and right swing of the ring gear 30, ensuring that the ring gear 30 rotates stably, thereby ensuring that the internal welding mechanism accurately completes the annular welding. The meshing transmission between the planetary gears 31, the sun gear 29, and the ring gear 30 can achieve precise speed and direction control. At the same time, the planetary carrier 32 is fixedly connected to the middle tie frame 17, and its vertical section abuts the end face of the ring gear 30 to limit the left and right swing of the ring gear 30, ensuring the stable rotation of the ring gear 30, thereby ensuring the accuracy of the movement trajectory of the internal welding mechanism during the annular welding process, greatly improving the quality and stability of the annular welding, and helping to obtain high-quality welding joints.

[0092] As part of the internal welding assembly 1, the planetary circulation unit works in conjunction with the axial travel mechanism, the middle tie frame 17, and other components. When the axial travel mechanism drives the entire assembly to translate axially along the drum 36, the planetary circulation unit activates in a timely manner according to welding requirements, driving the internal welding mechanism to perform circular welding. This, in conjunction with the internal welding mechanism's axial translation to weld longitudinal seams, improves the internal welding assembly's ability to weld different parts of the drum 36. Furthermore, it can work in conjunction with the external welding assembly 2 to complete the comprehensive welding of the drum 36, effectively reducing welding stress and improving overall welding efficiency and quality.

[0093] The planetary rotation unit precisely controls the circular motion trajectory of the internal welding mechanism, ensuring weld quality during circular welding. During translation, the axial travel mechanism, through coordination with the steel rope assembly and its own stable driving force, ensures precise positioning of the internal welding mechanism during longitudinal seam welding. This is particularly suitable for welding the interior of large, extra-long boiler drums 36. The planetary carrier 32's restraining effect on the ring gear 30 further enhances its rotational stability, ensuring the precision of the internal welding mechanism during circular welding.

[0094] Working in conjunction with the external welding assembly 2, it achieves synchronized internal and external welding, reducing welding stress and improving the quality and strength of the welded joint. Furthermore, the internal components work closely together, with the axial travel mechanism driving overall translation and the planetary rotation unit achieving circular rotation welding, improving the efficiency of the entire welding process.

[0095] The axial travel mechanism drives the internal welding mechanism to weld the internal longitudinal seam of the drum 36. It also works in conjunction with the external welding assembly 2 to achieve simultaneous welding of the internal and external longitudinal seams of the drum 36, effectively reducing welding stress and improving welding quality. The fixed-axis rotation of the planetary revolving unit drives the internal welding mechanism to complete the internal welding of the annular butt joint between the drum 36 and the pipe seat 37, meeting the welding requirements of different specifications.

[0096] The axial travel mechanism has an independent driving force and moves in the opposite direction to the steel rope group. This design makes it more flexible to move in the inner cylinder cavity of the drum 36, independent of the pulling direction of the steel rope group, and can better adapt to complex welding conditions.

[0097] In any of the above schemes, it is preferred that the internal welding mechanism includes an internal welding telescopic cylinder group 33 fixedly mounted on the outer wall of the gear ring 30, and an internal welding welding gun 34 is installed at the telescopic end of the internal welding telescopic cylinder group 33, which is used in conjunction with an external welding machine.

[0098] Axial translation welding of longitudinal seams: When welding longitudinal seams, the internal welding telescopic cylinder group 33 adjusts its telescopic length according to the longitudinal seam position of the drum 36, aligning the internal welding torch 34 with the longitudinal seam. At the same time, the internal welding torch 34 cooperates with the external welder to weld the longitudinal seam inside the drum 36.

[0099] Fixed-axis rotation welding of annular butt joint: the internal welding telescopic cylinder group 33 fixed on the outer wall of the gear ring 30 rotates accordingly. The internal welding telescopic cylinder group 33 adjusts the telescopic length according to the position of the annular internal weld at the butt joint of the boiler drum 36 and the pipe seat 37, so that the internal welding welding gun 34 is accurately aligned with the weld, and cooperates with the external welder to complete the annular internal welding.

[0100] The internal welding telescopic cylinder group 33 can flexibly adjust the position of the internal welding torch 34. Whether welding longitudinal seams with axial translation or welding annular butt joints with fixed-axis rotation, the internal welding torch 34 can be quickly and accurately aligned with the weld according to the changes in the weld position, improving the accuracy and quality of welding. With the guidance of the steel rope group, the internal welding assembly 1 can operate stably in the complex and space-limited environment inside the boiler drum 36. The design of the internal welding mechanism enables it to adapt to the welding requirements of boiler drums 36 and pipe seats 37 of different sizes. It is particularly suitable for welding the interior of large and extra-long boiler drums 36, effectively ensuring the efficient operation of the welding work.

[0101] In any of the above schemes, it is preferred that the middle parts of both sides of the middle tie frame 17 gather inward to ensure that there is no motion interference with the gear ring 30 when it rotates, and there is no motion interference with other components. The gear ring 30 rotates around the periphery of the middle parts of both sides of the middle tie frame 17; in addition, when the two steel ropes 35 pass through the middle tie frame 17, they pass through the space set on the left and right end covers thereof, and no motion interference will occur. The technical personnel in this field considered avoiding motion interference in accordance with the design requirements when designing.

[0102] The design of the middle parts of both sides of the central tie frame 17 converging inward and the end cover setting a specific space effectively avoids the possible motion interference between the various components during the operation of the entire internal welding assembly 1, ensures that the internal welding assembly 1 can operate stably during axial translation and fixed-axis rotation of the planetary circulation unit, and improves the reliability of equipment operation.

[0103] When the internal welding assembly 1 is powered, the axial travel mechanism, leveraging its own driving force, drives the entire internal welding assembly 1 to translate along the length of the steel cables 35. During this translation, the central tie frame 17 moves with the axial travel mechanism. Its inwardly converging center sections prevent interference with the ring gear 30 and other components during the rotation of the ring gear 30 and overall movement of the mechanism. Furthermore, the two steel cables 35 pass through the spaces between the end caps of the central tie frame 17, unhindered by the frame's movement.

[0104] The working process is as follows:

[0105] Preparation: Hoist and place the cylindrical drum 36 to be welded onto the first drive bracket, with the top of the drum roller abutting the bottom of the outer wall of the drum 36. Hoist and place the pipe seat 37 to be welded onto the second drive bracket, ensuring that the end face of the drum 36 and the end face of the pipe seat 37 are aligned and abutted during the hoisting process, with the top of the pipe seat 37 roller abutting the bottom of the outer wall of the pipe seat 37. Connect the internal welding assembly 1 to the external power supply, ensure that the lower welding gun 16 of the external welding assembly 2 is properly coordinated with the external welding machine, and check that all components are securely installed and that the tension of the steel rope group is appropriate.

[0106] Longitudinal seam welding stage of drum 36:

[0107] The external welding assembly 2 operates by operating the first hoist 8 of the left control unit and the second hoist 9 of the right control unit, retracting and releasing the ropes to rotate the steel rope assembly. As the first hoist 8 retracts the ropes and the second hoist 9 releases the ropes, the lower rope 35 of the rope assembly is pulled rightward, driving the lower sliding seat 11 of the external welding assembly 2 rightward along the ground-connected slide rail 12. The left and right end surfaces of the lower sliding seat 11 are detachably connected to the ends of the ropes 35. During this movement, the lower welding torch 16 performs external welding on the longitudinal seam directly below the drum 36.

[0108] Internal welding assembly 1 operates simultaneously with and in conjunction with external welding assembly 2. The axial travel mechanism of internal welding assembly 1, relying on its own driving force, travels rightward, counter to the direction of motion of the upper steel rope 35. The central axis of the axial travel mechanism is flexibly sleeved onto the outer walls of the two steel ropes 35. The dual-output motor 23 within the axial travel mechanism is activated, driving the upper axle 19 to rotate. This, in turn, synchronizes the rotation of the other upper axle 19 via a belt drive. The friction between the drive wheel 21 and the steel rope 35 drives the entire axial travel mechanism to the right.

[0109] During this process, the radial support cylinder assembly 25 of the radial support guide component adjusts its extension and retraction length according to the inner diameter of the drum 36, allowing the guide wheel assembly 26 to closely fit the inner wall of the drum 36, providing support and guidance for the axial travel mechanism. The axial travel mechanism drives the central tie frame 17, the planetary revolving unit, and the internal welding mechanism to translate along the length of the steel rope 35. The internal welding telescopic cylinder assembly 33 of the internal welding mechanism adjusts the position of the internal welding torch 34 to align it with the longitudinal seam of the drum 36, cooperating with the external welder to perform internal welding.

[0110] At the same time, the walking speed of the inner welding assembly 1 is controlled to be the same as the traction speed of the steel rope group, so that the inner welding assembly 1 and the outer welding assembly 2 can move synchronously inside and outside, thereby reducing welding stress.

[0111] The welding stage of the annular butt joint between the drum 36 and the pipe seat 37:

[0112] Positioning and Adjustment of External Welding Assembly 2: Under the traction of the steel rope group, the external welding assembly 2 moves to the position just below the joint between the drum 36 and the pipe seat 37 and is positioned. At this time, the positioning cylinder group 14 works to adjust the height of the lower welding lifting base 15 so that the lower welding gun 16 is aligned with the outer annular joint seam.

[0113] The drum 36 and the pipe base 37 rotate: The first external drive motor 5 of the first drive bracket is activated, driving the first friction roller 3 to rotate, driving the drum 36 to rotate around its own axis. The second external drive motor 7 of the second drive bracket is activated, driving the second friction roller 6 to rotate, causing the pipe base 37 to rotate around its own axis. By controlling these two motors, the drum 36 and the pipe base 37 rotate synchronously and at the same speed.

[0114] The outer welding assembly 2 welds the annular butt joint: as the drum 36 and the pipe seat 37 rotate, the lower welding gun 16 welds the outer annular butt joint to ensure that the weld is uniform and complete.

[0115] Internal welding assembly 1 welds the annular butt joint: The axial travel mechanism of internal welding assembly 1 drives the central tie frame 17, the planetary rotation unit, and the internal welding mechanism to the vicinity of the butt joint. The central drive motor 28 of the planetary rotation unit rotates the central sun shaft 27, which in turn rotates the sun gear 29. This, in turn, drives the ring gear 30, via the planetary gears 31, to rotate around the central sun shaft 27. The internal welding mechanism is mounted on the outer wall of the ring gear 30 and moves in a circular motion around the center of the boiler drum 36. The internal welding telescopic cylinder group 33 adjusts the position of the internal welding torch 34 to precisely align it with the annular internal weld seam. It cooperates with the external welder to complete the annular internal weld, operating synchronously with the external welding assembly 2 to reduce welding stress and improve weld quality.

[0116] Welding Completion and Equipment Reset: After welding is complete, stop all motors and the welding machine. Loosen the connection between the steel cable assembly and the external welding assembly 2 and return the external welding assembly 2 to its initial position. Turn off the power to the internal welding assembly 1 to stop its axial travel mechanism. Clean the welding site, inspect and maintain the equipment, and prepare for the next welding operation.

[0117] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention. For those skilled in the art, any replacement improvements or changes made to the implementation methods of the present invention fall within the scope of protection of the present invention.

[0118] Any matters not described in detail in the present invention are well-known technologies to those skilled in the art.

Claims

1. A butt welding assembly for achieving rapid welding of an industrial boiler container drum, comprising a fixed first drive bracket, a second drive bracket fixedly disposed on one side of the first drive bracket, and characterized in that: A left control unit is fixedly mounted on the ground connection seat on the left side of the first drive bracket, and a right control unit is fixedly mounted on the ground connection seat on the right side of the second drive bracket. A steel rope group is respectively provided between the left control unit and the right control unit, and both ends of the steel rope group are respectively tensioned and wound around the left control unit and the right control unit on the corresponding side. An internal welding assembly that cooperates with the upper steel rope group is installed in the inner cylinder cavity of the boiler drum, and an external welding assembly that is fixedly connected to the lower steel rope group is installed below the boiler drum. The inner welding assembly includes two axial travel mechanisms arranged inside the inner drum cavity of the boiler drum, the center of the axial travel mechanism being movably sleeved on the outer side walls of the two steel ropes and being used for translation along the length direction of the two steel ropes when working, the axial travel mechanism moving rightward by its own driving force and in the opposite direction of movement of the upper steel rope, a middle tensioning frame is installed between the two axial travel mechanisms, a planetary circulation unit is installed on the middle tensioning frame, and a plurality of inner welding mechanisms are installed at intervals on the outer side walls of the gear ring of the planetary circulation unit, the planetary circulation unit realizes fixed-axis rotation with the central axis of the boiler drum and drives the inner welding mechanisms installed on the axial outer side walls thereof to follow, and completes the internal welding of the annular butt joint of the boiler drum and the pipe seat during the fixed-axis rotation of the inner welding mechanism, and completes the internal welding of the boiler drum longitudinal seam when the inner welding mechanism realizes axial translation following the axial travel mechanism; The internal welding mechanism comprises an internal welding telescopic cylinder group fixedly mounted on the outer side wall of the gear ring, and an internal welding welding gun is mounted on the telescopic end of the internal welding telescopic cylinder group.

2. The butt welding assembly for realizing rapid welding of industrial boiler container drums according to claim 1, characterized in that: The first driving bracket cooperates with the second driving bracket to drive the boiler drum and the pipe seat to rotate synchronously along a fixed axis; The first driving support comprises a plurality of drum roller members arranged on both sides of the drum, the tops of the drum roller members are all in contact with the bottom of the outer wall of the drum, the drum roller members include a horizontally arranged first friction roller, both ends of the roller shaft of the first friction roller are movably inserted into the shaft hole of the side support seat on the corresponding side, the bottom of each side support seat is fixedly arranged, and a first external drive motor is fixedly installed on the side support seat on one side of at least one of the first friction rollers, and the first external drive motor is used to drive the first friction roller to rotate and drive the drum fixed axis to rotate; The second driving support comprises a plurality of tube seat roller members arranged on both sides of the boiler drum, the tops of the tube seat roller members are all in contact with the bottom of the outer wall of the cylindrical tube seat, the tube seat roller members include a horizontally arranged second friction roller, both ends of the roller shaft of the second friction roller are movably inserted into the axial hole of the side support seat on the corresponding side, the bottom of each side support seat is fixedly arranged, and a second external drive motor is fixedly installed on the side support seat on one side of at least one of the second friction rollers, and the second external drive motor is used to drive the second friction roller to rotate and drive the tube seat fixed axis to rotate; The first external drive motor cooperates with the second external drive motor to achieve synchronous and same-speed rotation of the boiler drum and the pipe seat.

3. The butt welding assembly for realizing rapid welding of industrial boiler container drums according to claim 2, characterized in that: The outer welding assembly cooperates with the inner welding assembly to realize synchronous welding of the inner and outer sides of the longitudinal seam of the boiler drum and the inner and outer sides of the annular weld at the butt joint of the boiler drum and the pipe seat; The upper steel rope group located inside the inner cylinder cavity is used to pass through the middle part of the inner welding assembly and realize circumferential constraint and guidance thereof; The lower layer of the steel rope group located below the boiler drum is used to drive the external welding assembly fixedly connected thereto to move along the horizontal axis.

4. The butt welding assembly for realizing rapid welding of industrial boiler container drums according to claim 3 is characterized in that: The left control unit includes a horizontally arranged first winch, and two parallel steel ropes are wound on the rope drum of the first winch. The upper end of each steel rope extends horizontally to the right and is wound around the right control unit, and the lower end of each steel rope extends horizontally to the right and is wound around the right control unit.

5. The butt welding assembly for realizing rapid welding of industrial boiler container drums according to claim 4, characterized in that: The right control unit includes a horizontally arranged second winch, and two parallel steel ropes are wound on the rope drum of the second winch. The upper end of each steel rope extends horizontally to the left and is wound on the rope drum of the left control unit, and the lower end of each steel rope extends horizontally to the left and is wound on the rope drum of the left control unit.

6. The butt welding assembly for realizing rapid welding of industrial boiler container drums according to claim 5, characterized in that: The steel rope group includes two steel ropes that are arranged in parallel at intervals and closed at both ends. The head and tail ends of each steel rope are arranged horizontally and are detachably fixed to the external welding assembly. The left and right sides of each steel rope are tightly wound on the corresponding rope drum of the left control unit and the rope drum of the right control unit.

7. The butt welding assembly for realizing rapid welding of industrial boiler container drums according to claim 6, characterized in that: Horizontal reversing rollers are respectively arranged directly below the rope drums of the first hoist and the second hoist; the front and rear ends of the central axis of the horizontal reversing roller are movably inserted into the rotating holes of the corresponding fixed frames, and the horizontal reversing rollers are used to guide the two steel ropes at the current position to change from the vertical direction to the horizontal direction.

8. The butt welding assembly for realizing rapid welding of industrial boiler container drums according to claim 7, characterized in that: The external welding assembly includes a lower sliding seat, and the two sides of the bottom of the sliding seat are respectively slidably connected to the ground slide rails at corresponding positions through slide grooves, and the bottoms of the two parallel ground slide rails are fixed on the top of the ground seat, and the left and right end surfaces of the lower sliding seat are detachably connected to the ends of the steel ropes. A vertically arranged positioning cylinder group is installed on the top of the sliding seat, and a lower welding lifting seat is installed on the top of the positioning cylinder group. A lower welding lifting seat is installed in the center of the lower welding lifting seat. The lower welding gun is used in conjunction with an external welding machine, and the welding end of the lower welding gun is arranged facing the longitudinal seam directly below the boiler drum.

Images