Alignment welding assembly for quickly welding boiler barrel of industrial boiler container

Abstract

The invention relates to the technical field of pressure vessel main body welding, in particular to an alignment welding assembly for quickly welding a boiler barrel of an industrial boiler container, which comprises a first driving support piece, a second driving support piece is fixedly arranged on one side of the first driving support piece, and a left position control unit is fixedly arranged on a connecting seat on the left side of the first driving support piece; and a left position control unit is fixedly installed on the ground connecting base on the right side of the second driving supporting piece, a right position control unit is fixedly installed on the ground connecting base on the right side of the second driving supporting piece, a steel rope set is arranged between the left position control unit and the right position control unit, an inner welding assembly is installed in an inner barrel cavity of the boiler barrel, and an outer welding assembly is installed below the boiler barrel. According to the device, the left position control unit and the right position control unit are adopted to drive the steel rope set to rotate, the outer welding assembly is driven to quickly shift and weld along the longitudinal seam of the boiler barrel, and meanwhile, the inner welding assembly and the outer welding assembly can synchronously work to synchronously weld the inner and outer longitudinal seams of the boiler barrel; when the annular butt joint seam is welded, the boiler barrel and the pipe base synchronously rotate to be matched with the outer welding assembly and the inner welding mechanism, and rapid welding is achieved.

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, the head and many 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] There are many problems in the traditional welding process of industrial boiler container drums. For the longitudinal seam welding of the drum and the docking of the drum and the pipe seat, the alignment is often done by manual operation or simple mechanical assistance. Not only is the alignment accuracy difficult to guarantee, but it is also inefficient and prone to docking deviation, resulting in unstable subsequent weld quality. Manual operation is also affected by the worker's skill level and working status, increasing the uncertainty of product quality.

[0004] After searching, a patent with patent application number CN202411359390.1 and IPC classification number B23K9 / 00 discloses 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 respectively weld the inside and outside of the boiler body, thereby achieving the purpose of synchronous welding of the inside and outside of the boiler body.

[0005] It can be seen from the records of existing boiler internal and external synchronous welding equipment that it mainly extends into the boiler drum through an extension piece, and at the same time relies on the threaded rod to drive the double welding guns to move linearly to drive the welding mechanism to move oppositely to achieve welding. There are 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 part, 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 positioning welding assembly is urgently needed. Summary of the invention

[0009] The present invention solves one of the above technical problems, and the technical solution adopted is: a counter-position welding assembly for realizing rapid welding of an industrial boiler container drum, comprising a fixedly arranged first driving bracket, a second driving bracket fixedly arranged on one side of the first driving bracket, the first driving bracket being used to support the bottom of a cylindrical drum to be welded, the second driving bracket being used to support the bottom of a pipe seat to be welded, a left control unit being fixedly installed on a connecting seat on the left side of the first driving bracket, a right control unit being fixedly installed on a connecting seat on the right side of the second driving bracket, a steel rope group being respectively arranged 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 inner welding assembly cooperating with the upper steel rope group being installed in the inner cylinder cavity of the drum, and an outer welding assembly fixedly connected to the steel rope group of the lower layer being installed below the drum.

[0010] In any of the above schemes, 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 member 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 holes of the side support seats on the corresponding sides, 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 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.

[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 synchronous welding of the inner and outer sides of the annular weld at the butt joint of the boiler drum and the pipe seat.

[0015] The upper layer of the 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, preferably, 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 around the rope drum of the left control unit, and the lower end of each steel rope extends horizontally to the left and is wound around 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 an interval and closed at the head and tail ends, the head and tail ends of each steel rope are horizontally arranged 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 schemes, preferably, 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 stand, and the horizontal reversing roller is used to guide the two steel ropes at the current position to change 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 to 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 opposite to 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 central movable sleeve of the axial travel mechanism is connected to 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, the axial travel mechanism relies on its own driving force to move to the right, and its movement direction is opposite to that 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 internal welding mechanisms are installed at intervals on the outer side wall 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 internal welding mechanisms installed on its axial outer side wall to follow, and the internal welding of the annular butt joint of the butt joint of the boiler drum and the pipe seat is completed during the fixed-axis rotation of the internal welding mechanism, and the internal welding of the longitudinal seam of the boiler drum is completed when the internal welding mechanism follows the axial travel mechanism to realize axial translation.

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

[0024] The specific beneficial effects are as follows:

[0025] 1. Improve welding efficiency: This device uses the left control unit and the right control unit to drive the steel rope group to rotate, drive the external welding assembly to quickly shift and weld along the longitudinal seam of the drum, and at the same time, the internal welding assembly and the external welding assembly can work synchronously to synchronously weld the internal and external longitudinal seams of the drum; when welding the annular butt joint, the drum and the pipe seat rotate synchronously to cooperate with the external welding assembly and the internal welding mechanism to achieve rapid welding. In actual welding operations, compared with traditional welding methods, it can greatly shorten the welding time and improve production efficiency.

[0026] 2. Ensure welding quality: The internal welding assembly and the external welding assembly move synchronously to weld the longitudinal seam, and the components work closely together during the annular butt welding, which can effectively reduce welding stress. At the same time, the planetary rotation unit accurately controls the circular motion trajectory of the internal welding mechanism, and the axial travel mechanism ensures the precise welding position of the longitudinal seam of the internal welding mechanism, which improves the welding quality and helps to obtain high-quality welded joints.

[0027] 3. Enhance the adaptability of the equipment: The first drive bracket and the second drive bracket in the device can stably support boiler drums and pipe seats of different sizes; the steel rope group is a flexible transmission part, 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 it to flexibly adjust the welding position to meet the welding requirements of boiler drums and pipe seats of different specifications, especially suitable for the welding of large-sized and extra-long boiler drums.

[0028] 4. Improve equipment stability and reliability: The dual output shaft motor and belt drive ensure that the two axial travel mechanisms run in high synchronization, which enhances the stability of the overall movement of the internal welding assembly. The driving wheel and the driven wheel are covered with steel ropes through annular wheel grooves to increase friction and make the movement of the axial travel mechanism more stable and reliable. The horizontal reversing roller guides the direction of the steel rope to avoid wear or derailment of the steel rope and ensure stable operation of the equipment. The middle tie frame avoids motion interference between components and improves the reliability of equipment operation.

[0029] 5. Convenient for equipment maintenance: The steel rope group and the external welding assembly are detachably connected, which is convenient for the installation, commissioning and later maintenance and replacement of the equipment. The structural design of the axial travel mechanism, external welding assembly and other components also facilitates the inspection, maintenance and replacement of each component, reducing the maintenance cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn according to the actual 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 schematic structural diagram of the internal welding assembly of the present invention in an 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] Fig. 9 It is a schematic diagram of the three-dimensional structure of the planetary circulation unit and its upper components of the present invention.

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

[0041] Fig.11 for Fig.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 winch; 9, second winch; 10, horizontal reversing roller; 11, lower sliding seat; 12, ground slide rail; 13, ground seat; 14, adjustment 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, drum; 37, pipe seat. DETAILED DESCRIPTION

[0043] The following is a detailed description of the embodiments of the technical solution of the present invention in conjunction with 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 cannot be used to limit the scope of protection of the present invention. Figure 1-Figure 11 as shown in .

[0044] Embodiment 1: A counter-welding assembly for realizing rapid welding of an industrial boiler container drum, comprising a fixedly arranged first driving bracket, a second driving bracket fixedly arranged on one side of the first driving bracket, the first driving bracket being used to support the bottom of a cylindrical drum 36 to be welded, the second driving bracket being used to support the bottom of a pipe seat 37 to be welded, a left control unit being fixedly installed on a connecting seat on the left side of the first driving bracket, a right control unit being fixedly installed on a connecting seat on the right side of the second driving bracket, steel rope groups being respectively arranged between the left control unit and the right control unit, two ends of the steel rope groups being respectively tensioned and wound around the left control unit and the right control unit on the corresponding sides, an inner welding assembly 1 cooperating with the upper steel rope group being installed in the inner cylinder cavity of the drum 36, and an outer welding assembly 2 fixedly connected to the steel rope group of the lower layer being 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 in the entire welding process, which 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 displacement 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 a positioned and working state, and the cylindrical boiler drum 36 and the pipe seat 37 in the jointed and tight state can be driven to rotate on a fixed axis by relying on the operation of the first driving bracket and the second driving bracket. 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, and after rotating one or more circles, it can complete the external annular welding of the current annular joint seam.

[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 realize displacement along 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 guiding and restraining effect of the upper steel rope group inside the inner drum cavity to ensure 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 collected 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 play the role of 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 fixedly installed 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 achieve internal and external synchronous butt welding, effectively ensuring the high efficiency of the welding process of the large-size and extra-long 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 longitudinal seam of the drum 36 and the internal and external welding of 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 running 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 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, 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, the bottoms of the side support seats 4 are fixedly arranged, and 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, 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 drum 36, 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, both ends of the roller shaft of the second friction roller 6 are movably inserted into the axial holes of the side support seat 4 on the corresponding side, the bottom of each side support seat 4 is fixedly arranged, 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 fixed axis to rotate.

[0053] The first external drive motor 5 cooperates with the second external drive motor 7 to achieve synchronous and same-speed rotation of the drum 36 and the pipe seat 37 .

[0054] During operation, the first external drive motor 5 is started to drive the first friction roller 3 to rotate, and the friction force drives the drum 36 to rotate around its own axis; similarly, the second external drive motor 7 drives the second friction roller 6 to rotate, so that the pipe seat 37 rotates around the axis. By regulating the first external drive motor 5 and the second external drive motor 7, the drum 36 and the pipe seat 37 can rotate synchronously and at the same speed.

[0055] The first driving bracket and the second driving 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, and ensure the synchronous rotation of the two when welding the annular butt joint, cooperate with the external welding assembly 2, realize 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 drum 36 and synchronous welding of the inner and outer sides of the annular weld at the joint of the drum 36 and the pipe seat 37.

[0057] The upper layer of the 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 control unit and the right control unit operate, and the steel rope group rotates by retracting and releasing the rope. When the left control unit retracts the rope, the right control unit releases the rope, and vice versa, causing the upper steel rope 35 of the steel rope group to shift to the left and the lower steel rope 35 to shift to the right, providing guidance and power traction for the inner welding assembly 1 and the outer welding assembly 2. Compared with traditional rigid transmission, the steel rope group, as a flexible transmission part, realizes smooth and flexible guidance and traction. Its tension state is adjustable, which can adapt to certain structural deformation, reduce equipment wear, and improve equipment reliability.

[0060] It should be noted that after the inner welding assembly 1 is powered on, the inner welding assembly 1 has the ability to move, and its bottom supports the inner wall of the inner drum cavity to maintain stability, and the upper steel rope group serves as a horizontal guide to constrain its moving direction. By controlling its walking speed to be the same as the traction speed of the steel rope group, it can achieve synchronous movement with the outer welding assembly 2 inside and outside, and weld the inner longitudinal seam of the drum 36. This independent shifting function has good synchronization with the outer welding assembly 2, and realizes synchronous welding of the inner and outer longitudinal seams of the drum 36, reducing welding stress and improving welding efficiency and quality. Relying on the guidance of the steel rope group, it adapts to the complex welding environment inside the large-sized and extra-long drum 36.

[0061] When the external welding assembly 2 is working, the lower steel rope group is pulled to the right under the drive of the left control unit and the right control unit, driving the external welding assembly 2 to move right synchronously to weld the external longitudinal seam of the drum 36; when the external welding assembly 2 moves to the position just below the joint between the drum 36 and the pipe seat 37, it keeps positioning, and at this time, the drum 36 and the pipe seat 37 rotate under the drive of the first driving bracket and the second driving bracket, and the external welding assembly 2 welds the annular butt joint. It is firmly connected to the steel rope group and can move quickly along the longitudinal seam for welding. When welding the annular butt joint, it cooperates well with the rotation of the drum 36 and the pipe seat 37 to ensure that the annular weld is complete and uniform, which is 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 around 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 be retracted and released. 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 moving speed and direction of the steel rope group can be accurately controlled, and then the movement of the inner welding assembly 1 and the outer welding assembly 2 can be accurately controlled to ensure that the welding process is carried out according to the 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 demand for traction when welding large-sized and extra-long drums 36. At the same time, it improves the stability of the operation of the steel rope group 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 around 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 around 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 around 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 retracts the rope, the second winch 9 releases the rope synchronously, and vice versa. The two parallel steel ropes 35 achieve smooth turnover of the steel rope group under the coordinated action of the two winches. This coordination makes the upper steel rope 35 shift to the left and the lower steel rope 35 shift to the right more stable and accurate. The second winch 9 provides the right control unit with a power output equivalent to the left control unit, ensuring that the force on both ends of the steel rope group is balanced. During the welding process, it can provide guidance and power traction for the inner welding assembly 1 and the outer 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 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 the head and tail ends, and the head and tail ends of each of the steel ropes 35 are horizontally arranged and detachably fixed to the external welding assembly 2, and the left and right sides of each of the steel ropes 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 and parallel steel ropes 35, closed at both ends, operate like a chain under the operation of the rope drums of the left and right control units. Since the ends of the steel rope 35 are detachably fixedly connected to the external welding assembly 2, when the rope drum of the left control unit retracts the rope and the rope drum of the right control unit releases the rope, the steel rope group rotates, driving the external welding assembly 2 to move along the longitudinal seam length direction of the drum 36. When welding the annular butt joint, the external welding assembly 2 moves to the position directly below the butt joint for positioning, and the drum 36 and the pipe seat 37 rotate under the drive of the first drive bracket and the second drive bracket, and the steel rope group remains in a tensioned state to ensure the stable operation of the external welding assembly 2.

[0068] The two steel ropes 35 are arranged in parallel at intervals, which increases the stability of the overall structure and can better bear the weight of the external welding assembly 2 and various forces generated during the movement compared to a single steel rope 35. The detachable connection method facilitates the installation, commissioning and later maintenance and replacement of the equipment.

[0069] In any of the above schemes, preferably, a horizontal reversing roller 10 is respectively arranged directly below the rope drum 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, so as 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 originally moving in the vertical direction will change direction along the surface of the roller after contacting the horizontal reversing roller 10, and smoothly change direction to the horizontal direction. In this process, the central axis of the horizontal reversing roller 10 rotates flexibly in the rotating hole of the fixed frame, 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 inner welding assembly 1 and the outer 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, and 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, and 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 opposite to the longitudinal seam directly below the 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 drum 36 to perform external longitudinal seam welding. When it is necessary to weld the external annular butt seam of the joint between the drum 36 and the pipe seat 37, the external welding assembly 2 moves to the designated position for positioning. At this time, the adjustment cylinder group 14 works, and the height of the lower welding lifting seat 15 can be adjusted according to the welding position requirements, and then the position of the lower welding gun 16 can be adjusted to ensure that the lower welding gun 16 can accurately weld the annular seam. At the same time, the 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 of 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 position during welding. The detachable connection with the steel rope 35 facilitates installation and maintenance. The arrangement of the position adjustment cylinder group 14 and the lower welding lifting seat 15 enables the lower welding gun 16 to flexibly adjust its position to meet the welding requirements of different heights and positions, greatly improving the applicability and welding quality of the external welding assembly 2. The adjustable structural design can quickly adjust to the optimal welding position when welding drums 36 and pipe seats 37 of different specifications, 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 central movable sleeve of the axial travel mechanism is connected to 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, the axial travel mechanism relies on its own driving force to move to the right, and its movement direction is opposite to that of the upper steel rope 35, a middle tensioning frame 17 is installed between the two axial travel mechanisms, a planetary circulation unit is installed on the middle tensioning frame 17, and a plurality of internal welding mechanisms are installed at intervals on the outer side wall 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 36 and drives the internal welding mechanisms installed on its axial outer side wall to follow, and the internal welding of the annular butt joint of the butt joint of the boiler drum 36 and the pipe seat 37 is completed during the fixed-axis rotation of the internal welding mechanism, and the internal welding of the longitudinal seam of the boiler drum 36 is completed when the internal welding mechanism follows the axial travel mechanism to realize axial translation.

[0074] Action principle: Axial translation welding of longitudinal seams: 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 during operation, driving the middle tie frame 17, the planetary turnover unit and the inner welding mechanism connected thereto to translate along the length direction of the steel rope 35 as a whole. In this process, the inner welding mechanism performs internal welding on the longitudinal seam of the drum 36. For example, in actual welding operations, when the left control unit drives the steel rope group to rotate and the right control unit drives the steel rope group to rotate, and the upper steel rope 35 moves to the left, the axial travel mechanism relies on its own power to translate to the right, ensuring that the inner welding mechanism moves accurately along the longitudinal seam of the drum 36 and completes the welding.

[0075] Fixed-axis rotation welding of annular butt joint: When performing internal welding of the annular butt joint at the joint of the drum 36 and the pipe seat 37, the planetary revolving unit rotates with the central axis of the drum 36 as the axis. Since the internal welding mechanism is installed on the outer wall of the planetary revolving unit gear ring 30, it will move in a circle around the center of the drum 36, and the annular internal welding is completed during the circular motion.

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

[0077] The first drive bracket and the second drive bracket drive the drum 36 and the pipe seat 37 to rotate: the first drive bracket includes a plurality of drum rollers, at least one of which is driven to rotate by the first external drive motor 5, thereby driving the drum 36 to rotate around its own axis. The second drive bracket includes a plurality of pipe seat 37 rollers, at least one of which is driven to rotate by the second external drive motor 7, thereby driving the pipe seat 37 to rotate around its own axis. By regulating the two motors, the drum 36 and the pipe seat 37 can 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, and is moved to the position directly below the butt joint of the drum 36 and the pipe seat 37 under the traction of the steel rope group. At this time, the positioning cylinder group 14 works to adjust the height of the lower welding lifting seat 15 so that the lower welding gun 16 is aligned with the external annular butt joint. As the drum 36 and the pipe seat 37 rotate under the drive of the first driving bracket and the second driving bracket, the lower welding gun 16 welds the external annular butt joint to ensure that the weld is uniform and complete.

[0079] The inner welding mechanism welds the inner annular butt joint: the axial travel mechanism of the inner welding assembly 1 drives the middle tie frame 17, the planetary circulation unit and the inner welding mechanism as a whole to the vicinity of the butt joint. The planetary circulation unit rotates around the central axis of the drum 36, driving the inner welding mechanism installed on the outer wall of its gear ring 30 to make a circular motion around the center of the drum 36. In this process, the inner welding mechanism completes the internal welding of the annular butt joint at the butt joint of the drum 36 and the pipe seat 37, and works synchronously with the outer welding assembly 2 to reduce welding stress and improve welding quality.

[0080] During the entire synchronous welding process, the various components cooperate closely, which greatly improves 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 when working.

[0082] Embodiment 2: Compared with Embodiment 1, this embodiment 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, in which two upper axles 19 arranged horizontally at intervals are installed in the central installation cavity of the central box body 18, and lower axles 20 are respectively arranged directly below each of the upper axles 19, and both inner and outer ends of each of the upper axles 19 and each of the lower axles 20 are movable through the axial hole on the central box body 18 and extend to the outside thereof, and driving wheels 21 and driven wheels 22 are respectively fixed on the outer side walls of the ends of each of the upper axles 19 and each of the lower axles 20, and the upper driving wheel 21 and the driven wheel 22 directly below it are connected to each other. After matching, the corresponding steel ropes 35 are respectively covered by the annular wheel grooves at the corresponding outer side 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, and the motor housing of the dual-output shaft motor 23 is fixed inside the central mounting cavity. The middle outer sides of the two upper wheel axles 19 are matched and connected by a belt transmission member 24. Radial support and guide components are respectively vertically fixedly installed on the top and bottom of the central box body 18, and the ends of each of the radial support and guide components abut against the corresponding inner side walls of the drum 36.

[0084] During operation, when the dual output shaft motor 23 is started, its output shaft drives the upper wheel axle 19 connected thereto to start rotating. Since the two upper wheel axles 19 are connected by a belt transmission member 24, the rotation of one upper wheel axle 19 will be transmitted by the belt, so that the other upper wheel axle 19 rotates synchronously. The driving wheel 21 is fixed at 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 the driving wheel 21 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 rotation of the axles, the two axial travel mechanisms can operate synchronously, thereby driving the middle tie frame 17, the planetary turnover unit and the internal welding mechanism connected thereto to translate stably along the axial direction in the inner cylinder cavity of the 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, which 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, thereby ensuring that the internal welding mechanism can accurately weld the longitudinal seam of the drum 36.

[0085] Its advantages are: the combination of the dual output shaft motor 23 and the belt transmission member 24 ensures that the two axial travel mechanisms can operate in high synchronization. This synchronization is crucial to the stability and consistency of the overall movement of the internal welding assembly 1, and greatly improves the quality of the internal welding of the longitudinal seam of the drum 36. The design of the driving wheel 21 and the driven wheel 22 covering the steel rope 35 through the annular wheel groove significantly increases the contact area with the steel rope 35, thereby enhancing the friction force, making the axial travel mechanism more stable and reliable when moving along the steel rope 35, and can adapt to the welding requirements under different working conditions. Whether in the scene with high welding speed requirements or in the face of complex changes in the tension of the steel rope 35, it can ensure stable operation. The setting of the radial support and guide components further enhances the stability of the axial travel mechanism in the complex and space-limited environment inside the drum 36. While supporting the weight of the mechanism, they accurately guide the movement of the mechanism, allowing the internal welding mechanism to accurately weld the longitudinal seam in the narrow inner cylinder cavity of the drum 36, which is particularly suitable for the internal welding operation of the large-sized and extra-long drum 36, and effectively guarantees the efficient and high-quality development of the welding work.

[0086] The driving wheel 21 and the driven wheel 22 play a key role in restricting the movement of the axial travel mechanism in the inner welding assembly 1 along the steel rope 35 through the upper and lower cooperation. Specifically, the upper driving wheel 21 and the driven wheel 22 directly below it respectively cover the corresponding steel rope 35 through the annular wheel grooves on the corresponding outer side walls. When the driving wheel 21 rotates with a fixed axis, it will move to the right along the steel rope 35 by relying on the friction between it and the steel rope 35, while the driven wheel 22 plays a role of auxiliary support and stability below.

[0087] In this process, the cooperation between the driving wheel 21 and the driven wheel 22 realizes constraints from multiple aspects. First, the covering of the steel rope 35 by the two constrains the movement direction of the axial travel mechanism, so that it can only move along the direction of the steel rope 35 and cannot deviate from the trajectory of the steel rope 35 at will, ensuring that the axial travel mechanism can accurately move along the axial direction of the drum 36, thereby ensuring that the internal welding mechanism accurately welds the longitudinal seam of the drum 36. Secondly, the driven wheel 22 provides stable support for the driving wheel 21, preventing the driving wheel 21 from jumping or tilting due to uneven force during rotation, and maintaining the stability of the entire axial travel mechanism during movement, which is crucial to ensuring welding quality in 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 body 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 tie frame 17, the planetary turnover unit and the internal welding mechanism to translate along the length direction of the steel rope 35 as a whole. In 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, which is especially suitable for the internal welding requirements 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 axial 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 plurality 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 drum 36, the inner wall of the tube seat 37 and the annular connection between the two. A planetary gear 31 is meshed along the axial direction 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 swinging. 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 is meshed with the planetary gear 31. Driven by the sun gear 29, the planetary gear 31 revolves around the sun gear 29 and rotates itself. Since the planetary gear 31 and the ring gear 30 are also meshed with each other, the movement of the planetary gear 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 ring gear 30 from swinging left and right to ensure 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 gear 31 and the sun gear 29 and the ring gear 30 can achieve precise speed and steering control. At the same time, the planetary carrier 32 is fixedly connected to the middle tie frame 17, and its vertical section abuts against 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 a part of the inner welding assembly 1, the planetary turnover unit works in coordination with the axial travel mechanism, the middle tie frame 17, etc. When the axial travel mechanism drives the whole to translate along the axial direction of the drum 36, the planetary turnover unit starts in time according to the welding requirements, drives the inner welding mechanism to perform annular welding, and cooperates with the function of the inner welding mechanism to axially translate and weld the longitudinal seam, thus improving the welding function of the inner welding assembly 1 to different parts inside the drum 36, and can cooperate with the outer welding assembly 2 to jointly complete the comprehensive welding work of the drum 36, effectively reducing welding stress and improving the overall welding efficiency and quality.

[0093] The planetary rotation unit can accurately control the circular motion trajectory of the inner welding mechanism to ensure the welding quality during annular welding. During the translation process, the axial travel mechanism ensures the accurate position of the inner welding mechanism during longitudinal seam welding through the cooperation with the steel rope group and its own stable driving force, which is especially suitable for the internal welding requirements of large-sized and extra-long drums 36. The limiting effect of the planetary carrier 32 on the ring gear 30 further improves the stability of the rotation of the ring gear 30 and ensures the accuracy of the inner welding mechanism during annular welding.

[0094] It works in coordination with the external welding assembly 2 to achieve synchronous welding of the inside and outside, reduce welding stress, and improve the quality and strength of the welded joint. At the same time, the internal components work closely together, such as the axial travel mechanism drives the overall translation, and the planetary turnover unit realizes annular rotation welding, which improves the efficiency of the entire welding process.

[0095] The internal welding mechanism is driven by the translation of the axial travel mechanism to achieve welding of the internal longitudinal seam of the drum 36, and can cooperate with the external welding assembly 2 to achieve synchronous 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 is used to drive the internal welding mechanism to complete the internal welding of the annular butt joint of 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 traction 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, and the welding gun is used in conjunction with an external welding machine.

[0098] Axial translation welding of longitudinal seams: When welding the longitudinal seams, the inner welding telescopic cylinder group 33 adjusts the telescopic length in time according to the longitudinal seam position of the drum 36, so that the inner welding welding gun 34 is aligned with the longitudinal seam. At the same time, the inner welding welding gun 34 cooperates with the external welding machine to weld the longitudinal seam inside the drum 36.

[0099] Fixed-axis rotating welding of annular butt joint: the internal welding telescopic cylinder group 33 fixed on the outer wall of the gear ring 30 rotates accordingly, and 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 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 welding machine 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 it is axial translation welding of longitudinal seams or fixed axis rotation welding of annular butt seams, the internal welding torch 34 can be quickly and accurately aligned with the weld according to the change of the weld position, thereby 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 drum 36. The design of the internal welding mechanism enables it to adapt to the welding requirements of drums 36 and pipe seats 37 of different sizes, and is particularly suitable for the internal welding of large-sized and extra-long drums 36, effectively ensuring the efficient conduct of welding work.

[0101] In any of the above schemes, it is preferred that the middle parts of both sides of the middle tensioning 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 tensioning frame 17; in addition, when the two steel ropes 35 pass through the middle tensioning frame 17, they pass through the space set on the left and right end covers thereof, and no motion interference will occur. Technical personnel in this field have considered avoiding motion interference in accordance with design requirements when designing.

[0102] The design of the middle parts of both sides of the middle tie frame 17 gathering inward and setting specific spaces on the end covers effectively avoids possible motion interference between the 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] After the internal welding assembly 1 is powered on, the axial travel mechanism drives the entire internal welding assembly 1 to translate along the length direction of the steel rope 35 by its own driving force. During the translation process, the middle tie frame 17 moves with the axial travel mechanism. Due to the design of the middle parts of both sides gathering inward, it avoids motion interference with the gear ring 30 and other components during the rotation of the gear ring 30 and the overall movement of the mechanism. At the same time, the two steel ropes 35 pass through the space of the end cover of the middle tie frame 17 and will not be hindered by the movement of the frame.

[0104] The working process is as follows:

[0105] Preparation stage: hoist and place the cylindrical drum 36 to be welded on the first driving bracket, with the top of the drum roller abutting against the bottom of the outer wall of the drum 36; hoist and place the pipe seat 37 to be welded on the second driving bracket, and control the end face of the drum 36 to abut against the end face of the pipe seat 37 during the hoisting process, with the top of the roller of the pipe seat 37 abutting against the bottom of the outer wall of the pipe seat 37. Connect the internal welding assembly 1 with the external power supply, ensure that the lower welding gun 16 of the external welding assembly 2 cooperates normally with the external welding machine, and check whether the installation of each component is stable and whether the tension of the steel rope group is appropriate.

[0106] Longitudinal seam welding stage of drum 36:

[0107] The external welding assembly 2 works: the first hoist 8 of the left control unit and the second hoist 9 of the right control unit are in operation, and the steel rope group is rotated by retracting and releasing the rope. When the first hoist 8 retracts the rope and the second hoist 9 releases the rope, the lower steel rope 35 of the steel rope group is pulled to the right, driving the lower sliding seat 11 of the external welding assembly 2 to move to the right along the ground slide rail 12. The left and right end surfaces of the lower sliding seat 11 are detachably fixed to the ends of the steel rope 35. During the movement, the lower welding gun 16 performs external welding on the longitudinal seam directly below the drum 36.

[0108] Working of the inner welding assembly 1: It is used together with the outer welding assembly 2 at the same time. The axial travel mechanism of the inner welding assembly 1 moves rightward against the movement direction of the upper steel rope 35 by its own driving force. The central movable sleeve of the axial travel mechanism is connected to the outer side wall of the two steel ropes 35. The double output shaft motor 23 inside it is started, driving the upper wheel shaft 19 to rotate, and the other upper wheel shaft 19 rotates synchronously through the belt drive. The driving wheel 21 drives the entire axial travel mechanism to move rightward by the friction with the steel rope 35.

[0109] During this process, the radial support cylinder group 25 of the radial support guide component adjusts the telescopic length according to the inner diameter of the drum 36, so that the guide wheel component 26 is closely attached to the inner wall of the drum 36, providing support and guidance for the axial travel mechanism. The axial travel mechanism drives the middle tie frame 17, the planetary circulation unit and the internal welding mechanism to translate along the length direction of the steel rope 35. The internal welding telescopic cylinder group 33 of the internal welding mechanism adjusts the position of the internal welding gun 34 to align it with the longitudinal seam of the drum 36, and cooperates with the external welding machine to perform internal welding.

[0110] At the same time, the travel 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 the external welding assembly 2: The external welding assembly 2 is moved and positioned just below the butt joint of the drum 36 and the pipe seat 37 under the traction of the steel rope group. At this time, the positioning cylinder group 14 works to adjust the height of the lower welding lifting seat 15 so that the lower welding gun 16 is aligned with the external annular butt joint.

[0113] The drum 36 and the pipe seat 37 rotate: the first external drive motor 5 of the first drive bracket is started, 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 started, driving the second friction roller 6 to rotate, and causing the pipe seat 37 to rotate around its own axis. By regulating the two motors, the drum 36 and the pipe seat 37 can 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] The inner welding assembly 1 welds the annular butt joint: the axial travel mechanism of the inner welding assembly 1 drives the middle tie frame 17, the planetary circulation unit and the inner welding mechanism to move as a whole to the vicinity of the butt joint. The central drive motor 28 of the planetary circulation unit runs, driving the central sun shaft 27 to rotate, causing the sun gear 29 to rotate, and then driving the ring gear 30 to rotate around the central sun shaft 27 through the planetary gear 31. The inner welding mechanism is installed on the outer wall of the ring gear 30, and moves in a circle around the center of the drum 36 with the ring gear 30. The inner welding telescopic cylinder group 33 adjusts the position of the inner welding gun 34 to accurately align it with the annular internal weld, cooperates with the external welding machine to complete the annular internal welding, and works synchronously with the external welding assembly 2 to reduce welding stress and improve welding quality.

[0116] Welding completion and equipment reset: After welding is completed, stop the operation of each motor and welding machine. Loosen the connection between the steel rope group and the external welding assembly 2, and move the external welding assembly 2 back to the initial position. Turn off the power supply of the internal welding assembly 1 to stop its axial travel mechanism from moving. Clean up 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 can be replaced by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate 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 protection scope of the present invention.

[0118] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A counter-position welding assembly for realizing rapid welding of an industrial boiler container drum, comprising a first fixed driving bracket, a second driving bracket fixedly arranged on one side of the first driving bracket, characterized in that: A left control unit is fixedly installed on the connecting seat on the left side of the first driving bracket, and a right control unit is fixedly installed on the connecting seat on the right side of the second driving bracket. Steel rope groups are respectively arranged between the left control unit and the right control unit. Two ends of the steel rope groups are respectively tensioned and wound around the left control unit and the right control unit on the corresponding sides. An internal welding assembly that cooperates with the upper steel rope group is installed in the inner drum cavity of the boiler drum, and an external welding assembly that is fixedly connected to the steel rope group of the lower layer is installed below the boiler drum.

2. The positioning welding assembly for realizing rapid welding of industrial boiler container drum according to claim 1 is 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 member 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 first friction roller arranged horizontally, 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 member includes a plurality of tube seat roller members arranged on both sides of the drum, the tops of the tube seat roller members are all in contact with the bottom of the outer side 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 shaft 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 positioning welding assembly for realizing rapid welding of industrial boiler container drum according to claim 2 is 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 layer of the steel rope group located inside the inner cylinder cavity is used to pass through the middle of the inner welding assembly and realize circumferential constraint and guidance thereon; 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 positioning welding assembly for realizing rapid welding of industrial boiler container drum 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 positioning welding assembly for realizing rapid welding of industrial boiler container drum according to claim 4 is 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 positioning welding assembly for realizing rapid welding of industrial boiler container drum according to claim 5 is characterized in that: The steel rope group includes two steel ropes that are arranged in parallel at intervals and closed at the head and tail ends. The head and tail ends of each steel rope are horizontally arranged and detachably fixedly connected 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 positioning welding assembly for realizing rapid welding of industrial boiler container drum according to claim 6 is characterized in that: Horizontal reversing rollers are respectively arranged directly below the rope drums of the first winch and the second winch; the front and rear ends of the central axis of the horizontal reversing roller are movably inserted in 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 positioning welding assembly for realizing rapid welding of industrial boiler container drum according to claim 7 is 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 sliding rails at corresponding positions through sliding grooves, and the bottoms of the two parallel ground sliding rails are fixed to 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, 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. The lower welding gun is used in conjunction with external welding, and the welding end of the lower welding gun is arranged opposite to the longitudinal seam directly below the boiler drum.

9. The positioning welding assembly for realizing rapid welding of industrial boiler container drum according to claim 8 is characterized in that: The internal welding assembly includes two axial travel mechanisms arranged inside the inner drum cavity of the boiler drum, the central movable sleeve of the axial travel mechanism is connected to 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, the axial travel mechanism relies on its own driving force to move to the right, and its movement direction is opposite to that 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 internal welding mechanisms are installed at intervals on the outer side wall 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 internal welding mechanisms installed on its axial outer side wall to follow, and the internal welding of the annular butt joint of the butt joint of the boiler drum and the pipe seat is completed during the fixed-axis rotation of the internal welding mechanism, and the internal welding of the longitudinal seam of the boiler drum is completed when the internal welding mechanism follows the axial travel mechanism to realize axial translation.

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