Ship pipeline centering device, ship pipeline assembling device and ship pipeline centering assembling method

Abstract

The ship pipeline centering device comprises a central axis positioning structure used for positioning the central axes of a plurality of pipelines. The central axis positioning structure comprises a supporting frame, a plurality of supporting arc plates, a rotating disc and a plurality of driven rotating assemblies. The supporting frame is provided with a central part and a plurality of extending parts extending outwards along the central part. The supporting arc plates and the extending parts are arranged in a one-to-one correspondence mode, each supporting arc plate comprises an arc plate and a connecting shaft, and the connecting shafts are movably arranged in the grooves of the extending parts. The rotating disc is arranged at the mounting part of the central part; a central through hole is formed in the center of the rotating disc; the driven rotation assemblies and the connecting shafts are arranged in a one-to-one correspondence mode, one ends of the driven rotation assemblies are connected with the rotating disc, the other ends of the driven rotation assemblies are connected with the connecting shafts of the supporting arc plates, and under driving of the rotating disc, the driven rotation assemblies drive the connecting shafts to move back and forth in the grooves. The pipeline is centered by using the central axis positioning structure, so that the ship pipeline centering assembly process is simplified, and the precision and efficiency of pipe orifice centering are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a ship pipeline centering device, an assembly device and a centering assembly method. Background Art

[0002] The ship piping unit has a long construction period due to its complex design and high precision requirements. The production process of the piping unit is divided into two steps: pipe rack production and splicing and pipe system installation. Under the existing technical conditions, the pipe system is installed after the pipe rack is made, sandblasted and painted. The pipe system is hoisted into the end face of the pipe rack and assembled and welded. The pipeline includes stainless steel pipes, carbon steel pipes and copper-nickel alloy pipes. The pipeline is easily damaged when installed on the pipe rack structure. At the same time, the assembly welding operation on the pipe rack is inconvenient and inefficient. Therefore, it is pre-assembled and welded in the inner field span, and after the pre-assembly and pipeline protection are completed, it is hoisted to the pipe rack for assembly and connection.

[0003] At present, for the argon arc welding process of the pipeline centering assembly process, specifically, first, the sealed pipeline is filled with argon gas for protection, and the welding tool is prepared at the same time. After the argon gas is filled, the argon arc welding primer is performed and the interference horse plate is removed simultaneously. After the weld is cooled, multiple argon arc welding fillings are performed, and finally the remaining horse plate is removed and the argon arc welding cover is performed. The molten pool should be carefully observed during the welding process to ensure the quality of the back weld. And the concentricity of the butt assembly of the single-sided welding and double-sided forming pipeline should meet the corresponding specification requirements. The method of manual centering assembly on the calibration platform in the prior art has the following defects: 1) The manual horizontal adjustment and pipe mouth centering method is used, and the assembly accuracy of the butt pipe is poor; 2) The skill levels of the on-site welders are uneven, and the welding efficiency and weld forming quality are different, and it is impossible to form a rhythmic and stable production. 3) When the pipeline is placed on the calibration platform, there is overhead welding during the welding process, which is inconvenient for the welder to operate. Summary of the invention

[0004] In view of the problems existing in the prior art described above, the present application provides a ship pipeline centering device, an assembly device and a centering assembly method, which not only simplifies the ship pipeline centering assembly process, but also improves the accuracy and efficiency of pipe opening centering.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a ship pipeline centering device, including a center axis positioning structure for positioning the center axes of multiple pipelines, the center axis positioning structure including:

[0006] The support frame has a central portion and a plurality of extension portions extending outward from the central portion, the central portion has a mounting portion, and each extension portion has a groove;

[0007] A plurality of supporting arc plates are arranged corresponding to the extension parts one by one, each supporting arc plate comprises an arc plate and a connecting shaft, and the connecting shaft is movably arranged in the groove of the extension part;

[0008] A rotating disk is arranged at the mounting portion of the central portion, and a central through hole is provided at the center of the rotating disk;

[0009] A plurality of driven rotary assemblies are arranged corresponding to the connecting shafts one by one. One end of the driven rotary assembly is connected to the rotating disk, and the other end is connected to the connecting shaft supporting the arc plate. Driven by the rotating disk, the driven rotary assembly drives the connecting shaft to move back and forth in the groove.

[0010] Optionally, the central axis positioning structure further includes:

[0011] A gear is arranged on a side of the central part away from the driven rotary assembly and adjacent to the rotating disk, wherein a motor is arranged inside the gear;

[0012] The rack is arranged on the rotating disk and meshes with the gear, so as to drive the rotating disk to rotate under the driving of the gear.

[0013] Optionally, the extensions are evenly distributed around the central portion.

[0014] Optionally, the ship pipeline centering device further includes a pipeline centering structure, and the pipeline centering structure includes:

[0015] Fixed platform for placing pipelines;

[0016] Lifting platform for placing pipelines;

[0017] The trolley is installed under the lifting platform and has omnidirectional wheels that can be adjusted in any direction and angle.

[0018] The scissor arm is set between the jacking platform and the centering trolley to control the lifting and lowering of the jacking platform.

[0019] Optionally, the fixed platform and the lifting platform respectively include:

[0020] Multiple slideways, each slideway is arranged on the fixed platform and the jacking platform in a direction perpendicular to the pipeline;

[0021] A plurality of sliders, each slider is arranged between the slideway and the pipeline, and each slider has a channel along a direction perpendicular to the pipeline;

[0022] A plurality of screw rod structures, each of which penetrates into the channel of the slider and is exposed to the outside;

[0023] At least two rollers, each roller is arranged between the slider and the pipeline;

[0024] A torque motor is connected to the roller to control the rotation of the roller;

[0025] The gear assembly comprises a first gear and a second gear, wherein the first gear is disposed on the screw structure, and the second gear meshes with the first gear to drive the first gear to rotate and thus drive the screw structure to rotate and move;

[0026] A servo motor is connected to the second gear to drive the second gear to rotate;

[0027] The belt structure connects adjacent screw rod structures so that the adjacent screw rod structures rotate and move synchronously.

[0028] Optionally, the distance from one end of the extension portion of the support frame away from the central portion to the geometric center of the central portion is less than or equal to the length of the radius of the pipeline.

[0029] Another aspect of the present invention provides a ship pipeline assembly device, the ship pipeline assembly device includes a ship pipeline centering device, the ship pipeline centering device is the ship pipeline centering device described above, the ship pipeline assembly device also includes an argon filling structure, the argon filling structure is arranged inside one end of each pipeline for welding, so as to fill the welding pipe section between two pipelines to be welded with argon, and the argon filling structure includes:

[0030] Two fixing plates arranged opposite to each other;

[0031] A sponge is arranged around the circumference of the two fixed plates;

[0032] an argon gas inlet, disposed on one of the fixed plates;

[0033] The argon gas outlet is arranged on another fixed plate.

[0034] Optionally, the ship pipeline assembly device further includes a welding structure, and the welding structure includes:

[0035] The welding workstation is set up adjacent to the pipeline to be welded;

[0036] The robot arm is connected to the welding workstation and is used to move the welding gun to weld the welding pipe section.

[0037] Another aspect of the present invention provides a method for centering and assembling a ship pipeline, using the ship pipeline assembly device described above, comprising the following steps:

[0038] Select two pipelines that need to be aligned, record them as pipeline A and pipeline B, and fix pipeline A and pipeline B to the fixed platform and jacking platform of the ship pipeline centering device respectively;

[0039] At least two center axis positioning structures of the ship pipeline centering device are installed inside pipeline A and pipeline B respectively. Each pipeline that needs to locate the center axis includes two center axis positioning structures, and the two center axis positioning structures are respectively arranged inside the two ends of the pipeline;

[0040] Adjust each central axis positioning structure to fit the inner wall of pipeline A and pipeline B where the central axis positioning structure is located;

[0041] The line connecting the central through holes of at least two central axis positioning structures inside pipeline A is marked as central axis A, and the straight line where central axis A is located is adjusted to pass through the central through holes of all central axis positioning structures inside pipeline B.

[0042] Optionally, the central axis A is marked by emitting a laser beam using a laser device.

[0043] Optionally, after the straight line where the central axis A is located passes through the central through holes of all the central axis positioning structures inside the pipeline B, the following steps are also included:

[0044] An argon gas filling structure of a ship pipeline centering device is arranged inside one end of each pipeline for welding;

[0045] Filling the welding pipe section between the two pipelines to be welded with argon gas through the argon filling structure;

[0046] Weld the pipe sections.

[0047] As described above, the ship pipeline centering device, assembly device and centering assembly method provided by the present invention have at least the following beneficial technical effects:

[0048] The ship pipeline centering device of the present invention comprises a center axis positioning structure for positioning the center axis of multiple pipelines, and the center axis positioning structure comprises a support frame, multiple support arc plates, a rotating disk and multiple driven rotary assemblies. The support frame has a center portion and multiple extensions extending outward from the center portion, and the center portion has a mounting portion, and each extension portion has a groove. Multiple support arc plates are arranged one-to-one with the extension portions, and each support arc plate comprises an arc plate and a connecting shaft, and the connecting shaft is movably arranged in the groove of the extension portion. The rotating disk is arranged at the mounting portion of the center portion, and a center through hole is provided at the center of the rotating disk. Multiple driven rotary assemblies are arranged one-to-one with the connecting shaft, and one end of the driven rotary assembly is connected to the rotating disk, and the other end is connected to the connecting shaft of the support arc plate. Driven by the rotating disk, the driven rotary assembly drives the connecting shaft to move back and forth in the groove. By using the center axis positioning structure to center the pipeline, not only the centering assembly process of the ship pipeline is simplified, but also the accuracy and efficiency of the pipe mouth centering are improved.

[0049] The ship pipeline assembly device also includes an argon filling structure and a welding structure. The argon filling structure is arranged inside one end of each pipeline for welding to fill the welding pipe section between two pipelines that need to be welded with argon. The welding structure has high flexibility and effectively improves the weld forming quality and welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 Shown is a schematic structural diagram of the ship pipeline centering device provided by the present invention.

[0051] Figure 2 A top view of the ship pipeline centering device provided by the present invention without the pipeline is shown.

[0052] Figure 3 A front view of the ship pipeline centering device provided by the present invention without including the pipeline is shown.

[0053] Figure 4 Shown is a side view of the ship pipeline centering device provided by the present invention.

[0054] Figure 5a Shown is a left view of the center axis positioning structure of the ship pipeline centering device provided by the present invention.

[0055] Figure 5b The right side view of the central axis positioning structure of the ship pipeline centering device provided by the present invention is shown

[0056] Figure 6 Shown is a structural diagram of a support frame of the central axis positioning structure provided by the present invention.

[0057] Figure 7a The right side view of the argon filling structure of the ship pipeline centering device provided by the present invention is shown.

[0058] Figure 7b A left view showing the argon filling structure of the ship pipeline centering device provided by the present invention

[0059] Figure 8 Shown is a schematic flow chart of the ship pipeline centering assembly method provided by the present invention.

[0060] Reference numerals

[0061] 1. Pipeline; 11. Inner wall; 12. Pipeline A; 121. Central axis A; 13. Pipeline B; 14. Welded pipe section; 2. Central axis positioning structure; 21. Support frame; 211. Center; 2111. Mounting part; 212. Extension; 2121. Groove; 22. Support arc plate; 221. Arc plate; 222. Connecting shaft; 23. Rotating disk; 231. Central through hole; 24. Driven rotary assembly; 25. Gear; 26. Rack; 3. Argon filling structure; 31. Fixed plate; 32. Sponge; 33. Argon inlet; 34. Argon outlet; 35. Screw; 36. Pull ring; 4. Fixed platform; 41. Slide; 42. Slider; 421. Channel ;43. Screw structure;44. Driven roller group bracket;441. Driven roller;4411. Roller;44111. Flange coupling;44112. Mounting elbow plate;44113. Torque motor;44114. Limit plate;45. Gear assembly;451. First gear;452. Second gear;46. Servo motor;47. Belt structure;5. Lifting platform;6. Centering trolley;61. Omnidirectional wheel;62. Cylinder;621. Earring with bushing;622. Connecting rod;63. Axial support seat;64. Scissor arm support seat;7. Scissor arm;71. Long axis;8. Welding structure;81. Welding workstation;82. Robot arm;9. Pipeline centering structure. DETAILED DESCRIPTION

[0062] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0063] It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner. Although the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation, the form, quantity, positional relationship and proportion of each component in actual implementation can be changed at will under the premise of realizing the technical solution of this party, and the component layout form may also be more complicated.

[0064] Embodiment 1

[0065] This embodiment provides a ship pipeline centering device, which includes a center axis positioning structure 2 for positioning the center axes of multiple pipelines 1. Each pipeline 1 to be centered includes two center axis positioning structures 2. Figure 1 As shown in FIG. 7 , the central axis positioning structure 2 includes a support frame 21 , a plurality of supporting arc plates 22 , a rotating disk 23 and a plurality of driven rotating components 24 .

[0066] Specifically, refer to Figure 5a Zhihe Figure 6 The support frame 21 has a central portion 211 and a plurality of extension portions 212 extending outward from the central portion 211, and the extension portions 212 are evenly distributed around the central portion 211. The central portion 211 has a mounting portion 2111, and each extension portion 212 has a groove 2121. The length of the distance from one end of the extension portion 212 of the support frame 21 away from the central portion 211 to the geometric center of the central portion 211 is less than or equal to the length of the radius of the pipeline 1, so that the support frame 21 can be smoothly installed inside the pipeline 1. The supporting arc plates 22 are arranged one by one with the extension portions 212, and each supporting arc plate 22 includes an arc plate 221 and a connecting shaft 222, and the connecting shaft 222 is movably arranged in the groove 2121 of the extension portion 212, and the groove 2121 is used to accommodate the connecting shaft 222 of the supporting arc plate 22, allowing the connecting shaft 222 to move within a certain range. The arc plate 221 is in contact with the inner wall 11 of the pipeline 1. The rotating disk 23 is arranged at the mounting portion 2111 of the central portion 211. A central through hole 231 is provided at the center of the rotating disk 23. In order to ensure sufficient accuracy when the subsequent pipeline is aligned, the diameter of the central through hole 231 is between 1 mm and 2 mm. The driven rotary components 24 are arranged one by one with the extension portion 212. One end of each driven rotary component 24 is connected to the rotating disk 23, and the other end is connected to the connecting shaft 222 of the supporting arc plate 22. The driven rotary components 24 are retractable.

[0067] The ship pipeline centering device also includes a gear 25 and a rack 26. The gear 25 is arranged on the side of the central part 211 away from the driven rotary assembly 24 and adjacent to the rotating disk 23. The gear 25 has a motor (not shown in the figure) inside. The rack 26 is arranged on the rotating disk 23 and meshes with the gear 25 to drive the rotating disk 23 to rotate under the drive of the gear 25.

[0068] Reference Figure 1 , Figures 5a to 6In an optional embodiment of the present embodiment, the central axis positioning structure 2 is installed inside the two ends of the pipeline 1, and the motor (not shown in the figure) drives the gear 25 to rotate, and the gear 25 meshes with the rack 26 to drive the rack 26 to rotate. Since the rack 26 is arranged on the rotating disk 23, it can drive the rotating disk 23 to rotate. One end of the driven rotary component 24 is connected to the rotating disk 23, and the other end is connected to the connecting shaft 222 of the supporting arc plate 22 and is retractable. Therefore, when the rotating disk 23 rotates, it will drive the driven rotary component 24 to move and retract, and the driven rotary component 24 will drive the connecting shaft 222 of the supporting arc plate 22 to move and retract in the groove 2121 of the extension part 212 of the support frame 21, so that the arc plate 221 of the supporting arc plate 22 fits with the inner wall 11 of the pipeline 1. When the arc plate 221 of the supporting arc plate 22 fits tightly with the inner wall 11 of the pipeline 1, the central through hole 231 of the rotating disk 23 of the pipeline central axis positioning structure 2 coincides with the center of the circle of the pipeline 1. The central axis of the pipeline 1 is obtained by the two central axis positioning structures 1 at the front and rear ends of the pipeline 1. Similarly, the central axis of other pipelines 1 is also obtained by this method, and a laser device (not shown in the figure) is used to emit laser to the adjacent pipeline 1 that needs to be centered, and the emitted laser is used as the centering reference to center the pipeline 1. When the central axes of the adjacent pipelines 1 that need to be centered are in the same straight line, the centering operation can be completed, which improves the assembly accuracy of the pipeline docking. Setting the diameter of the center through hole 231 between 1mm and 2mm can both improve the accuracy and ensure the smooth passage of the laser.

[0069] Reference Figure 1 The ship pipeline centering device also includes a pipeline centering structure 9, which includes a fixed platform 4, a lifting platform 5, a centering trolley 6 and a scissor arm 7.

[0070] Reference Figures 1 to 4The fixed platform 4 and the lifting platform 5 are used to place the pipeline 1. In an optional embodiment of the present embodiment, the two pipelines 1 that need to be centered are defined as pipeline A12 and pipeline B13. The fixed platform 4 is used to place pipeline A12, and pipeline A12 on the fixed platform 4 is used as the centering reference. The lifting platform 5 is used to place pipeline B13, and the centering of pipeline A12 and pipeline B13 is achieved by adjusting pipeline B13 on the lifting platform 5. A centering trolley 6 is arranged below the lifting platform 5. The centering trolley 6 has omnidirectional wheels 61, and the omnidirectional wheels 61 can be adjusted in any direction and angle. A scissor arm 7 is arranged between the lifting platform 5 and the centering trolley 6 to control the lifting and lowering of the lifting platform 5; a scissor arm support seat 64 and an axial support seat 63 are arranged on the upper surface of the centering trolley 6 and the lower surface of the lifting platform 5. The scissor arm support seat 64 and the axial support seat 63 are connected to the scissor arm 7 to achieve the support and adjustment of the scissor arm 7. The oil cylinder 62 is mounted on the upper surface of the centering trolley 6 by bolts. The centering trolley 6 is connected with a bushing earring 621 . The bushing earring 621 is connected to the long axis 71 of the scissor arm 7 to transmit the torque output by the oil cylinder 62 .

[0071] Reference Figures 1 to 4 In order to solve the difficulty of overhead welding for welders during the pipeline centering assembly process, the fixed platform 4 and the lifting platform 5 respectively include multiple slideways 41, multiple sliders 42, multiple screw structures 43, at least two rollers 4411 and a torque motor 44113. Each slideway 41 is arranged on the fixed platform 4 and the lifting platform 5 in a direction perpendicular to the pipeline 1. Each slider 42 is arranged between the slideway 41 and the pipeline 1, and each slider 42 has a channel 421 in a direction perpendicular to the pipeline 1. Each screw structure 43 penetrates into the channel 421 of the slider 42 and is exposed to the outside. Each roller 4411 is arranged between the slider 42 and the pipeline 1. The rotation function of the pipeline 1 is to realize the rotational motion through the friction force transmission between the roller 4411 and the pipeline 1. The roller 4411 is arranged on the driven roller 441, and the driven roller 441 is arranged on the driven roller group bracket 44. The driven roller group bracket 44 is arranged on the slider 42, which ensures the stability of the rotating mechanism during operation. The end shafts at both ends of the roller 4411 are respectively provided with a limit plate 44114 and a torque motor 44113 for connection. The torque output of the torque motor 44113 is transmitted to the roller 4411 through the flange coupling 44111. The limit plate 44114 and the mounting elbow plate 44112 are fixedly connected to the adjacent driven roller group bracket 44. The torque motor 44113 is connected to the roller 4411 to control the rotation of the roller 4411, thereby rotating the pipeline 1. The servo motor 46 is connected to the second gear 452 to drive the second gear 452 to rotate, and the second gear 452 drives the first gear 451 to rotate so that the screw structure 43 rotates. The belt structure 47 connects adjacent screw structures 43 so that the adjacent screw structures 43 rotate synchronously.

[0072] Reference Figures 1 to 4 , the ship pipeline centering device also includes a gear assembly 45, a servo motor 46 and a belt structure 47. Since the pipelines 1 on the ship are of various types and sizes, the ship pipeline centering device needs to have a high degree of flexibility and adaptability. In the ship pipeline centering device, different pipelines 1 can be easily adapted by changing the spacing between the sliders 42. When a pipeline 1 with a larger diameter needs to be installed, the spacing between the sliders 42 can be increased; and when a pipeline 1 with a smaller diameter needs to be installed, the spacing between the sliders 42 can be reduced. In this embodiment, the gear assembly 45 includes a first gear 451 and a second gear 452, the first gear 451 is arranged on the screw structure 43, and the second gear 452 is meshed with the first gear 451 to drive the first gear 451 to rotate, thereby driving the screw structure 43 to rotate and move. The rotation of the screw structure 43 can drive the slider 42 to move along the slide 41, so that the spacing between the sliders 42 can be changed. This flexible adjustment mechanism enables the ship pipeline centering device to cope with various complex installation scenarios.

[0073] Embodiment 2

[0074] This embodiment provides a ship pipeline assembly device, which includes a ship pipeline centering device. The ship pipeline centering device of this embodiment is the ship pipeline centering device described in Embodiment 1. The structure of the ship pipeline centering device is not described in detail here.

[0075] Reference Figure 1 , Figure 4As shown in FIG7 , the ship pipeline assembly device also includes an argon filling structure 3, which is arranged inside one end of each pipeline 1 for welding, so as to fill the welding pipe section between two pipelines 1 to be welded with argon. The distance between the argon filling structure 3 and the end of the pipeline 1 for welding is between 150 mm and 250 mm. This distance not only ensures the effective filling range of argon, but also avoids the problem of interfering with the welding operation due to too close distance or reducing the protection effect due to too far distance. The argon filling structure 3 includes two relatively arranged fixed plates 31, a sponge 32, an argon inlet 33 and an argon outlet 34. The sponge 32 is arranged around the circumferential surface of the two fixed plates 31. The sponge 32 has good air suction and gas storage capacity, and can play a role of buffering and uniformly distributing gas during the argon filling process, ensuring that every corner inside the welding pipe section can be fully protected by argon. In order to achieve effective filling and discharge of argon, the argon inlet 33 is arranged on one of the fixed plates 31, and the argon outlet 34 is located on the other fixed plate 31. Such a layout ensures that argon can smoothly enter the welding pipe section and be smoothly discharged through the gas outlet after filling, thus avoiding gas retention and waste. To facilitate installation and disassembly, the argon filling structure 3 is also provided with a pull ring 36. The presence of the pull ring 36 enables the operator to easily and quickly complete the installation and disassembly of the structure, greatly improving work efficiency and convenience of operation.

[0076] Reference Figures 1 to 4 The ship pipeline assembly device also includes a welding structure 8, and the welding structure 8 includes a welding workstation 81 and a mechanical arm 82. The welding workstation 81 is arranged adjacent to the pipeline 1 to be welded. The mechanical arm 82 is connected to the welding workstation 81, and is used to move the welding gun to weld the welding pipe section. The welding workstation 81 is an integrated design of welding power supply and welding configuration, and has the characteristics of portability. The welding configuration is a welding work package, which has a variety of complex welding processes and welding parameters for a variety of materials, mainly including flying air arc, swing process, arc tracking, multi-layer multi-pass, laser tracking and other process packages. The combination of the welding workstation 81 and the mechanical arm 82 greatly reduces the labor intensity of welders, lowers the technical threshold of arc welding, and improves the efficiency of pipeline centering welding.

[0077] Embodiment 3

[0078] This embodiment provides a method for centering and assembling a ship pipeline. The ship pipeline centering and assembling method of this embodiment uses the ship pipeline centering device described in Example 1. Figures 1 to 8 , including the following steps:

[0079] S100: Select two pipelines that need to be aligned, respectively denoted as pipeline A and pipeline B, and fix the pipeline A and the pipeline B to a fixed platform and a jacking platform of a ship pipeline centering device respectively;

[0080] Specifically, before fixing pipeline A12 and pipeline B13 to the fixed platform 4 and the lifting platform 5 of the ship pipeline centering device, the fixed platform 4 needs to be fixed. Then, pipeline A12 and pipeline B13 are hoisted to the fixed platform 4 and the lifting platform 5 respectively. The positions of the slider 42, the screw structure 43, the roller 4411, etc. on the fixed platform 4 and the lifting platform 5 are adjusted according to the diameters of pipeline A12 and pipeline B13. Then, the flatness of the pipe openings of pipeline A12 and pipeline B13 is checked and polished.

[0081] S200: Install at least two center axis positioning structures of the ship pipeline centering device inside the pipeline A and the pipeline B respectively, and each pipeline that needs to locate the center axis includes two center axis positioning structures inside, and the two center axis positioning structures are respectively arranged inside the two ends of the pipeline; S300: Adjust each center axis positioning structure to fit the inner wall of the pipeline A and the pipeline B where the center axis positioning structure is located;

[0082] S400: Mark the line connecting the central through holes of at least two of the central axis positioning structures inside the pipeline A as the central axis A, and adjust the line where the central axis A is located to pass through the central through holes of all the central axis positioning structures inside the pipeline B.

[0083] Specifically, in an optional embodiment of the present embodiment, a laser device (not shown in the figure) is used to emit light to the central through holes of at least two of the central axis positioning structures inside pipeline A, so that the central axis A121 is visualized and used as the centering reference for pipelines A12 and B13. The centering trolley 6 is started, and the bottom of the centering trolley 6 has omnidirectional wheels 61, which can be adjusted in any direction and angle. With pipeline A12 as a reference, an inspection template (not shown in the figure) is set at the pipe mouth of pipeline B13 away from the centering, and the position of pipeline B13 is adjusted so that the light emitted by the laser device passes through the central through holes 231 inside pipelines A12 and pipeline B13, that is, the straight line where the central axis A121 is located passes through the central through holes of at least two central axis positioning structures 2 inside pipeline B13. After adjusting to the point where the straight line where the central axis A121 is located passes through the central through holes 231 of all central axis positioning structures 2 inside pipeline B13, the following steps are also included:

[0084] First, the argon filling structure 3 of the ship pipeline centering device is arranged inside one end of each pipeline 1 for welding. Then, the welding pipe section 14 between the two pipelines 1 to be welded is filled with argon through the argon filling structure 3. Finally, the welding pipe section 14 is welded.

[0085] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A ship pipeline centering device, characterized in that: A central axis positioning structure is included for positioning the central axes of a plurality of pipelines, the central axis positioning structure comprising: The support frame has a central portion and a plurality of extension portions extending outward from the central portion, wherein the central portion has a mounting portion, and each of the extension portions has a groove; A plurality of supporting arc plates are arranged one by one corresponding to the extension parts, each of the supporting arc plates comprises an arc plate and a connecting shaft, and the connecting shaft is movably arranged in the groove of the extension part; A rotating disk, arranged on the mounting portion of the central portion, wherein the center of the rotating disk has a central through hole; A plurality of driven rotating components are arranged one by one corresponding to the connecting shaft, one end of the driven rotating component is connected to the rotating disk, and the other end is connected to the connecting shaft of the supporting arc plate. Driven by the rotating disk, the driven rotating component drives the connecting shaft to move back and forth in the groove.

2. The ship pipeline centering device according to claim 1, characterized in that: The central axis positioning structure also includes: A gear, arranged on a side of the central portion away from the driven rotary assembly and adjacent to the rotating disk, wherein a motor is provided inside the gear; The rack is arranged on the rotating disk and meshes with the gear so as to drive the rotating disk to rotate under the driving of the gear.

3. The ship pipeline centering device according to claim 1, characterized in that: The extensions are evenly distributed around the central portion.

4. The ship pipeline centering device according to claim 1, characterized in that: The diameter of the central through hole is between 1 mm and 2 mm.

5. The ship pipeline centering device according to claim 1, characterized in that: It also includes a pipeline centering structure, which includes: A fixed platform for placing the pipeline; A lifting platform, used for placing the pipeline; A centering trolley is arranged below the jacking platform, and the centering trolley has omnidirectional wheels, which can be adjusted in any direction and angle; The scissor arms are arranged between the jacking platform and the centering trolley to control the lifting and lowering of the jacking platform.

6. The ship pipeline centering device according to claim 5, characterized in that: The fixed platform and the lifting platform respectively include: A plurality of slideways, each of which is arranged on the fixed platform and the lifting platform in a direction perpendicular to the pipeline; A plurality of sliders, each of which is disposed between the slideway and the pipeline, and each of which has a channel along a direction perpendicular to the pipeline; A plurality of screw rod structures, each of which penetrates into the channel of the slider and is exposed to the outside; At least two rollers, each of which is disposed between the slider and the pipeline; A torque motor connected to the roller to control the rotation of the roller; A gear assembly, comprising a first gear and a second gear, wherein the first gear is disposed on the screw structure, and the second gear is meshed with the first gear to drive the first gear to rotate, thereby driving the screw structure to rotate and move; a servo motor connected to the second gear to drive the second gear to rotate; The belt structure connects the adjacent screw rod structures so as to make the adjacent screw rod structures rotate and move synchronously.

7. The ship pipeline centering device according to claim 1, characterized in that: The distance from one end of the extension portion of the support frame away from the central portion to the geometric center of the central portion is less than or equal to the length of the radius of the pipeline.

8. A ship pipeline assembly device, characterized in that: The ship pipeline assembly device includes a ship pipeline centering device, the ship pipeline centering device is the ship pipeline centering device according to any one of claims 1 to 7, and the ship pipeline assembly device also includes an argon filling structure, the argon filling structure is arranged inside one end of each of the pipelines for welding, so as to fill the welding pipe section between two of the pipelines to be welded with argon, and the argon filling structure includes: Two fixing plates arranged opposite to each other; A sponge is arranged around the circumferential surfaces of the two fixing plates; An argon gas inlet is provided on one of the fixed plates; The argon gas outlet is arranged on the other fixed plate.

9. The ship pipeline assembly device according to claim 8, characterized in that: Also included is a welding structure, the welding structure comprising: A welding workstation is arranged adjacent to the pipeline to be welded; A mechanical arm is connected to the welding workstation and is used for moving the welding gun to weld the welding pipe section.

10. A method for centering and assembling a ship pipeline, characterized in that: The ship pipeline assembly device according to any one of claims 8 to 9 comprises the following steps: Select two pipelines that need to be aligned, which are respectively referred to as pipeline A and pipeline B, and fix the pipeline A and the pipeline B to the fixed platform and the jacking platform of the ship pipeline centering device respectively; At least two center axis positioning structures of the ship pipeline centering device are installed inside the pipeline A and the pipeline B respectively, and each pipeline that needs to locate the center axis includes two center axis positioning structures, and the two center axis positioning structures are respectively arranged inside the two ends of the pipeline; Adjusting each of the central axis positioning structures to fit the inner walls of the pipeline A and the pipeline B where the central axis positioning structure is located; The line connecting the central through holes of at least two of the central axis positioning structures inside the pipeline A is marked as the central axis A, and the straight line where the central axis A is located is adjusted to pass through the central through holes of all the central axis positioning structures inside the pipeline B.

11. The ship pipeline centering assembly method according to claim 10, characterized in that: The central axis A is marked by emitting a laser beam using a laser device.

12. The ship pipeline centering assembly method according to claim 10, characterized in that: After adjusting until the straight line where the central axis A is located passes through the central through holes of all the central axis positioning structures inside the pipeline B, the following steps are also included: The argon filling structure of the ship pipeline centering device is arranged inside one end of each of the pipelines for welding; Filling the welding pipe section between the two pipelines to be welded with argon gas through the argon filling structure; The welding pipe section is welded.

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