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CN-121988924-A - Rapid assembly and welding construction method for boiler steam blowpipes

CN121988924ACN 121988924 ACN121988924 ACN 121988924ACN-121988924-A

Abstract

The application discloses a rapid assembly welding construction method of a boiler steam blowing pipe, which comprises the steps of manufacturing a welding auxiliary structure with small pipe diameter and large pipe diameter, lifting a pipeline to an installation position for butt joint, aligning the pipe orifice of the pipeline according to the pipe diameter selection corresponding to the welding auxiliary structure, performing preliminary welding positioning, and completing final butt welding after removing the auxiliary structure, and manufacturing an automatic wire twisting device for assisting in installing the welding auxiliary structure. The application achieves the technical effects of rapidly and accurately completing the assembly and welding of the boiler steam blowpipes and improving the construction efficiency and quality.

Inventors

  • HUANG HAI
  • DING YONGJIAN
  • Yang Ticao

Assignees

  • 广州市旺隆热电有限公司

Dates

Publication Date
20260508
Application Date
20260131

Claims (8)

  1. 1. A rapid assembly welding construction method for a boiler steam blowpipe is characterized by comprising the following steps: Manufacturing a small-pipe-diameter welding auxiliary structure (2), wherein the small pipe comprises two independent arc-shaped pressing plates (21), connecting bolts (23) and connecting nuts (24), a welding window (211) is formed in the middle of each arc-shaped pressing plate (21) in a penetrating mode, and manufacturing a large-pipe-diameter welding auxiliary structure (3), the large pipe comprises a hinged hoop (31), a plurality of limiting supports (32) and a plurality of adjusting bolts (33), the limiting supports (32) are fixed on the outer side of the hinged hoop (31), one ends of the limiting supports (32) away from the hinged hoop (31) are connected with the adjusting bolts (33) in a threaded mode, and the screw thread screwing direction of the adjusting bolts (33) is parallel to the radial direction of the hinged hoop (31); Lifting a plurality of pipelines to corresponding installation positions, performing butt joint operation of adjacent pipelines, wherein one of the two pipelines is used as a fixed end pipeline (1) to be fixed, and the other pipeline is used as a movable end pipeline (9) and is close to a pipe orifice of the fixed end pipeline (1), and selecting a corresponding welding auxiliary structure according to the pipe diameter; When the small-diameter pipeline is in butt joint, the two arc-shaped pressing plates (21) tightly hold the connecting sections of the two adjacent pipelines under the locking action of the threads of the connecting bolts (23) and the connecting nuts (24) to align the pipe orifice of the fixed end pipeline (1) with the pipe orifice of the movable end pipeline (9); when large-diameter pipelines are butted, the hinged hoop (31) is fixed on the periphery of the pipe orifice of the fixed end pipeline (1), the plurality of positioning brackets encircle the periphery of the movable end pipeline (9), the end parts of the plurality of adjusting bolts (33) face the periphery of the movable end pipeline (9), the end parts of the adjusting bolts (33) are driven to radially precess towards the movable end pipeline (9) by simultaneously rotating the plurality of adjusting bolts (33), so that the pipe orifice position of the movable end pipeline (9) is extruded and adjusted until the pipe orifices of the two pipelines are aligned, and then the butted positions of the adjacent pipelines are subjected to preliminary welding positioning; And after the two pipelines are initially welded and positioned, the welding auxiliary structure is dismantled, and the final butt welding operation between the adjacent pipelines is completed.
  2. 2. The rapid assembly welding construction method for the steam blowpipes of the boiler according to claim 1, wherein the rapid assembly welding construction method is characterized in that: Manufacturing an automatic wire twisting device, wherein the automatic wire twisting device comprises a longitudinal mounting seat (4), two transverse mounting seats (5), four sliding seats (7), four rotating frames (6) and four groups of screw driving mechanisms (8), wherein the two transverse mounting seats (5) are longitudinally and slidably connected to the longitudinal mounting seat (4), the four sliding seats (7) are respectively arranged at the two transverse mounting seats (5), the sliding seats (7) are transversely and slidably connected to the transverse mounting seats (5), the four rotating frames (6) are in one-to-one correspondence with the four sliding seats (7), the rotating frames (6) are rotationally connected to the corresponding sliding seats (7), the four rotating frames (6) are in one-to-one correspondence with the four screw driving mechanisms (8), the screw driving mechanisms (8) are arranged at the corresponding rotating frames (6), and the screw driving mechanisms (8); When the small-pipe-diameter welding auxiliary structure (2) is installed, two transverse installation seats (5) are placed on two sides of a fixed end pipeline (1), then the positions of the screw driving mechanisms (8) are adjusted through sliding adjustment of the transverse installation seats (5) and the sliding seats (7), and the directions of screw output ends of the screw driving mechanisms (8) are adjusted through rotation of the adjusting rotating frame (6), so that the screw output ends of the two screw driving mechanisms (8) on one transverse installation seat (5) are respectively butted with the heads of connecting bolts (23) on two sides of an arc-shaped pressing plate (21), the two screw driving mechanisms (8) on the other transverse installation seat (5) are respectively aligned with connecting nuts (24) on two sides of the arc-shaped pressing plate (21), and the corresponding connecting nuts (24) and the connecting bolts (23) are driven to synchronously and reversely rotate through simultaneous starting, so that the locking purpose between the connecting nuts (24) and the connecting bolts (23) is achieved.
  3. 3. The rapid assembly welding construction method of the boiler steam blowing pipe is characterized in that the number of limit brackets (32) of the large-pipe-diameter welding auxiliary structure (3) is 4, when the large-pipe-diameter welding auxiliary structure (3) is installed, the hinged hoop (31) is fixed at the pipe orifice of the fixed end pipeline (1), two transverse installation seats (5) are placed on two sides of the fixed end pipeline (1), then the positions of the screwing driving mechanisms (8) are adjusted through sliding adjustment of the transverse installation seats (5) and the sliding seats (7), and the directions of screwing output ends of the screwing driving mechanisms (8) are adjusted through rotation of the adjusting rotating frame (6), so that the screwing output ends of the four screwing driving mechanisms (8) are respectively in butt joint with the heads of the adjusting bolts (33) on the four limit brackets (32), and the four screwing driving mechanisms (8) are started simultaneously to drive the four adjusting bolts (33) to synchronously rotate, so that the purpose that the screwing driving bolts (33) synchronously abut against the periphery of the movable end pipeline (9) is achieved.
  4. 4. A rapid assembly welding construction method for a boiler steam blowing pipe is characterized in that the screwing-in driving mechanism (8) comprises a driving motor (81), a connecting cylinder (82), a sliding square-shaped bolt (83) and an adapter (84), the driving motor (81) is horizontally arranged at a rotating frame (6), the connecting cylinder (82) is coaxially and fixedly connected to an output shaft of the driving motor (81), one end of the connecting cylinder (82) far away from the driving motor (81) is provided with a square sliding groove, the sliding square-shaped bolt (83) is slidably connected into the square sliding groove along the axial direction of the connecting cylinder (82), the adapter (84) is arranged at the end part of the sliding square-shaped bolt (83), the adapter (84) is used for being clamped with the head part of a connecting bolt (23), a connecting nut (24) or the head part of an adjusting bolt (33), and the connecting cylinder (82) is driven to rotate through the driving motor (81) and simultaneously drives the sliding square-shaped bolt (83) and the adapter (84) to rotate so as to realize the corresponding sliding square-shaped bolt (23) or the sliding square-shaped bolt (33) to act forwards.
  5. 5. The rapid assembly and welding construction method for the boiler steam blowing pipe according to claim 4, wherein the adapter (84) is arranged in a penetrating manner along the axial direction of the sliding direction (83) so as to accommodate the tail part of the connecting bolt (23), and when the adapter (84) is clamped with the connecting nut (24), the tail part of the connecting bolt (23) penetrates into the adapter (84).
  6. 6. The rapid assembly and welding construction method for boiler steam blowpipes of claim 4, wherein the square chute is internally provided with an elastic piece (85), and the elastic piece (85) is used for driving the sliding square tube (83) to slide towards the opening direction of the square chute.
  7. 7. The rapid assembly and welding construction method for the boiler steam blowpipes is characterized in that positioning seats (10) are arranged on opposite sides of two transverse installation seats (5), an arc-shaped groove is formed in one side, far away from the transverse installation frame, of each positioning seat (10), the arc-shaped groove is matched with the outer wall of a pipeline, and when the positioning seats (10) of the two transverse installation seats (5) are abutted to the outer wall of the pipeline, the four installation seats are symmetrically distributed on two sides of the pipeline.
  8. 8. A rapid assembly welding construction method for a boiler steam blowing pipe according to claim 3 is characterized in that the longitudinal mounting seat (4) is provided with a longitudinal driving piece (11) for driving the two transverse mounting seats (5) to be close to or far away from each other, and the transverse mounting seat (5) is provided with a transverse driving piece (12) for driving the two sliding seats (7) to be close to or far away from each other.

Description

Rapid assembly and welding construction method for boiler steam blowpipes Technical Field The application relates to the field of pipeline welding, in particular to a rapid assembly welding construction method for a boiler steam blowpipe. Background In the field of thermal power generation, a boiler system is a core component, and connection of steam pipelines is a key link for guaranteeing stable operation of the whole system. With the continuous development of thermal power generation technology, the requirements on the safety and reliability of a boiler system are higher and higher. The quality of the steam pipeline connection directly affects the long-term safe operation of the steam turbine, and further affects the stability and efficiency of the whole power generation process. The high-quality steam pipeline connection can reduce energy loss, improve power generation efficiency, reduce operation cost and has important significance for sustainable development of thermal power generation industry. In the conventional installation construction of a thermal power generation boiler system, in order to solve the problem of butt connection of steam pipelines, a few simple tools and methods are generally adopted. A common means is to use a hoist, crow bar, or other tool to adjust the alignment of the pipes. An operator will move the pipe with the pulling force of the hoist in an attempt to align the pipe's interface, and at the same time pry the pipe with a crow bar to fine tune the position of the pipe. In some cases, the positions and angles of the opposite openings are marked on the pipeline by means of manual measurement and marking, and then the installation operation is carried out. However, these methods have certain limitations in practical applications. In the traditional construction, tools such as a hoist and a crow are adopted to adjust the pipeline aligning effect, so that the quality problems such as aligning misalignment, flatness deviation and uneven gaps are easy to occur. These problems are particularly evident when faced with the variation of the diameter of the pipes, due to the limitations of the working space and of the difficulty of installation, and it is difficult to guarantee the quality of the connection of the steam pipes, which in turn affects the long-term safe operation of the steam turbine. Disclosure of Invention In order to achieve the connection quality between pipelines, the application provides a rapid assembly welding construction method for a boiler steam blowpipe. The application provides a rapid assembly welding construction method for a boiler steam blowpipe, which adopts the following technical scheme: A rapid assembly welding construction method for a boiler steam blowpipe comprises the following steps: the method comprises the steps of manufacturing a small-pipe-diameter welding auxiliary structure, manufacturing a large-pipe-diameter welding auxiliary structure, wherein the small pipe comprises two independent arc pressing plates, connecting bolts and connecting nuts through the welding auxiliary structure, and the middle part of each arc pressing plate is provided with a welding window in a penetrating manner; lifting a plurality of pipelines to corresponding installation positions, and performing butt joint operation of adjacent pipelines, wherein one of the two pipelines is used as a fixed end pipeline, and the other pipeline is used as a movable end pipeline and is close to a pipe orifice of the fixed end pipeline, and a corresponding welding auxiliary structure is selected according to the pipe diameter; When the small-diameter pipelines are butted, the two arc-shaped pressing plates tightly hold the connecting sections of the two adjacent pipelines under the locking action of the threads of the connecting bolts and the connecting nuts, so that the pipe orifice of the fixed end pipeline and the pipe orifice of the movable end pipeline are aligned; When the large-diameter pipeline is in butt joint, the hinged hoop is fixed on the periphery of the pipe orifice of the fixed end pipeline, the positioning brackets encircle the periphery of the movable end pipeline, the end parts of the adjusting bolts face the periphery of the movable end pipeline, the end parts of the adjusting bolts are driven to radially screw in towards the movable end pipeline by rotating the adjusting bolts simultaneously so as to extrude and adjust the pipe orifice positions of the movable end pipeline until the pipe orifices of the two pipelines are aligned, and then the butt joint positions of the adjacent pipelines are subjected to preliminary welding positioning; And after the two pipelines are initially welded and positioned, the welding auxiliary structure is dismantled, and the final butt welding operation between the adjacent pipelines is completed. By adopting the technical scheme, special welding auxiliary structures are respectively designed for the small-pipe-diameter pipeline a