Assembling method of large-scale structure horizontal sheet for ocean platform

Abstract

The invention discloses an assembling method of a large-scale structure horizontal piece for an ocean platform. The assembling method comprises the steps that structural buttress configuration is determined; the heights of the structural buttresses are adjusted, and a gradienter is used for ensuring that all the structural buttresses are located on the same horizontal plane; a main beam is placed and fixed, specifically, the main beam and the girder are placed on the structural buttress with the adjusted height, and primary spot welding fixing is conducted on the main beam; secondary beams are placed and connected, specifically, the secondary beams are placed on the main beams, and spot welding connection is conducted; girder connection and welding: respectively performing spot welding connection on the girders, the main girders and the auxiliary girders, and then sequentially completing welding of the girders, the main girders and the auxiliary girders; welding seam inspection and polishing; levelness measurement and leveling are carried out; and welding the deck and the beam. According to the method, by optimizing the assembling steps and the welding sequence, the assembling efficiency and precision are improved, welding deformation is effectively controlled, the quality and stability of the assembling work of the horizontal piece of the large-scale structure of the ocean platform are improved, and an efficient and accurate assembling technical scheme is provided for the field of ocean engineering.

Description

Technical Field

[0001] The invention relates to the technical field of marine engineering, and in particular to an assembly method of a large-scale structural horizontal sheet for an offshore platform. Background Art

[0002] As an important infrastructure for the development of marine resources, the construction quality and service life of offshore platforms are of vital importance to ensure the safety and economic benefits of marine engineering. During the construction of offshore platforms, the assembly of large-scale horizontal structural pieces is one of the key links, and its assembly quality and efficiency directly affect the safety, stability and economic benefits of the entire platform.

[0003] Existing assembly methods often have problems such as low efficiency, low precision, difficult to control welding deformation and unstable structure. These problems not only affect the construction quality of offshore platforms, but may also have an adverse impact on the safety and service life of the platform. Therefore, the development of a new large-scale structural horizontal piece assembly method is of great significance to improving the construction quality and efficiency of offshore platforms. Summary of the invention

[0004] The present invention provides a method for assembling a large-scale structural horizontal sheet for an offshore platform to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] A method for assembling a large structural horizontal piece for an offshore platform comprises the following steps:

[0007] S1. Determine the configuration of the structural buttresses, and determine the number of height-adjustable structural buttresses and their placement;

[0008] S2. Adjust the height of the structural piers and use a level to ensure that all structural piers are at the same level;

[0009] S3. Place and fix the main beam. Place the main beam and the girders on the structural piers with adjusted heights, and perform preliminary spot welding on the main beams;

[0010] S4. Place and connect the secondary beam: place the secondary beam on the main beam and connect them by spot welding;

[0011] S5. Connect and weld the beam, spot weld the beam to the main beam and the auxiliary beam respectively, and then weld the beam, main beam and auxiliary beam in sequence;

[0012] S6. Weld inspection and grinding: After welding is completed, all welds are strictly inspected and the spatter around the welds is polished;

[0013] S7. Horizontal measurement and leveling: Use a level to measure the horizontal piece of the structure after welding, and perform leveling on the deformed position that exceeds the specification value;

[0014] S8. Welding of deck to beam: Weld the deck to the main beam, secondary beam and main beam, ensuring that the weld is located on the beam and no hollow part appears.

[0015] Optionally, the structural pier includes a base, a first support seat, a positioning shaft, a second support seat, a screw sleeve, a third screw rod and a beam support plate, the first support seat is arranged on the base, the lower end of the second support seat extends into the first support seat, the height of the second support seat extending into the first support seat is adjustable, the position of the second support seat and the first support seat is locked by the positioning shaft, the upper end of the second support seat is provided with a screw sleeve, the screw sleeve is threadedly connected to the third screw rod, and the upper end of the third screw rod is provided with a beam support plate.

[0016] Optionally, the outer side walls of the first support seat and the second support seat are respectively provided with a plurality of corresponding limiting holes from top to bottom, and the positioning shaft is selectively inserted into the limiting holes.

[0017] Optionally, in step S2, a level is used to measure the height of the structural piers, and fine-tuning is performed through a third screw rod to ensure that the main beam, the secondary beam and the main beam are on the same horizontal plane.

[0018] Optionally, in step S7, the leveling method includes heating with a fire and ballast blocks with heavy objects.

[0019] In summary, the technical effects and advantages of the present invention are as follows: the present application provides an efficient and precise method for assembling horizontal plates of large structures of offshore platforms, which not only improves assembly efficiency and quality and optimizes the work flow, but also effectively controls welding deformation and enhances structural safety, thereby ensuring the quality and stability of the overall structure, and providing an innovative and practical technical solution for the field of marine engineering; the method has broad application prospects and market value, and is particularly suitable for assembly operations of horizontal plates of large structures such as offshore platforms. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of a flow chart of a method for assembling a large-scale horizontal structural piece for an offshore platform in one embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of a structural buttress in one embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of an assembly method of a large-scale structural horizontal sheet for an offshore platform in one embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of leveling of an assembly method of a large-scale structural horizontal piece for an offshore platform in one embodiment of the present invention;

[0025] Figure 5 It is a large-scale structural horizontal sheet used for an offshore platform in one embodiment of the present invention.

[0026] Among them: 1. Structural pier; 11. Base; 12. First support seat; 13. Positioning shaft; 14. Second support seat; 15. Screw sleeve; 16. Third screw rod; 17. Beam support plate; 2. Main beam; 3. Auxiliary beam; 4. Main beam; 5. Welding equipment; 6. Level; 7. Heavy ballast block; 8. Deck. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] This embodiment proposes an assembly method for a large-scale horizontal structure of an offshore platform, which uses a height-adjustable structural pier, a level, welding equipment, a leveling tool, and auxiliary tools such as a weld inspection and grinding tool. This method aims to optimize the assembly process, reduce welding deformation, ensure the stability and safety of the structure, and improve assembly accuracy and efficiency by precisely controlling the assembly steps and welding sequence, thereby ensuring the construction quality and safety of the offshore platform. Figure 1-Figure 4 As shown, it includes the following steps:

[0030] S1. Determine the configuration of the structural pier 1, determine the number of height-adjustable structural piers 1 and their placement;

[0031] According to the design drawings of the horizontal piece of the offshore platform structure, the structural form, size and arrangement of the main beam 2, the auxiliary beam 3 and the main beam 4 are analyzed, and the number and optimal placement of the adjustable-height structural piers 1 are calculated and determined using the principles of engineering mechanics and structural analysis software to ensure that the distribution of the adjustable-height structural piers 1 can meet the support requirements of the main beam 2, the auxiliary beam 3 and the main beam 4 during assembly, and effectively reduce the number of the adjustable-height structural piers 1.

[0032] S2. Adjust the height of the structural pier 1, adjust the height of the structural pier 1, and use the level 6 to ensure that all structural piers 1 are at the same level;

[0033] First, according to the assembly height requirements of the main beam 2, the auxiliary beam 3 and the main beam 4, the height of the adjustable height structural pier 1 is roughly adjusted through the positioning shaft 13 to ensure that the main beam 2, the auxiliary beam 3 and the main beam 4 can be placed at the appropriate height of the adjustable height structural pier 1 to facilitate subsequent assembly work. After the height of the adjustable height structural pier 1 is roughly adjusted, the height of the adjustable height structural pier 1 is accurately measured using the level 6. When the height of the adjustable height structural pier 1 is not uniform, the height of the adjustable height structural pier 1 is fine-tuned to the same height through the third spiral rod 16 to ensure that the main beam 2, the auxiliary beam 3 and the main beam 4 are on the same horizontal plane to ensure assembly accuracy.

[0034] S3. Place and fix the main beam 2. Place the main beam 2 and the beam 4 on the structural pier 1 with the adjusted height, and perform preliminary spot welding on the main beam 2;

[0035] According to the requirements of the design drawings, the main beam 2 and the large beam 4 are placed in sequence on the adjustable height structural pier 1 whose height has been adjusted, and the main nodes of the main beam 2 are spot-welded by the welding equipment 5 to preliminarily fix the position of the main beam 2.

[0036] S4. Placement and connection of the sub-beam 3: place the sub-beam 3 on the main beam 2 and perform spot welding connection;

[0037] After the main beam 2 is fixed, the auxiliary beam 3 is accurately placed on the main beam 2 according to the requirements of the design drawings, and spot-welded by the welding equipment 5. This step requires that the relative position between the auxiliary beam 3 and the main beam 2 is accurate to ensure the stability and bearing capacity of the overall structure.

[0038] S5. Connect and weld the beam 4, spot-weld the beam 4 to the main beam 2 and the auxiliary beam 3, and then weld the beam 4, the main beam 2 and the auxiliary beam 3 in sequence;

[0039] After the main beam 2 and the auxiliary beam 3 are connected, the main beam 4 is spot-welded to the main beam 2 and the auxiliary beam 3 respectively by the welding equipment 5 according to the requirements of the design drawings. After the main beam 4, the main beam 2 and the auxiliary beam 3 are connected, the welding of the main beam 4, the welding of the main beam 2 and the welding of the auxiliary beam 3 are completed in sequence by the welding equipment 5. By optimizing the welding sequence, the deformation generated during the welding process can be effectively reduced, and the accuracy and stability of the overall structure of the structural horizontal sheet can be improved.

[0040] S6. Weld inspection and grinding: After welding is completed, all welds are strictly inspected and the spatter around the welds is polished;

[0041] After the welding of the main beam 2, the auxiliary beam 3 and the main beam 4 is completed, all the welds are strictly inspected using weld inspection tools to ensure that the weld quality meets the relevant standards and specifications. At the same time, the spatter around the weld is polished using a grinding tool to ensure the smooth transition and structural performance of the weld.

[0042] S7. Horizontal measurement and leveling: Use a level 6 to measure the horizontal level of the structure after welding, and level the deformed position that exceeds the specification value;

[0043] The horizontality of the structural horizontal piece after welding is measured using the level meter 6. According to the measurement results and specification requirements, the deformed positions that exceed the specification values ​​are leveled. The leveling methods include but are not limited to methods such as heating with fire and heavy ballast blocks 7 to ensure the overall flatness and stability of the structural horizontal piece.

[0044] S8. Welding of deck 8 and beams: Welding deck 8 to main beam 2, secondary beam 3 and beam 4, ensuring that the weld is located on the beam and no hollow part is present;

[0045] After the structural horizontal plate is leveled, the deck 8 is welded to the main beam 2, the secondary beam 3 and the main beam 4 by means of the welding equipment 5. The welds between the decks 8 must be located on the main beam 2, the secondary beam 3 and the main beam 4, and no hollowness can occur, so as to ensure the enhancement of the strength and stability of the overall structure.

[0046] Optionally, the structural pier 1 includes a base 11, a first support seat 12, a positioning shaft 13, a second support seat 14, a screw sleeve 15, a third screw rod 16 and a beam support plate 17, the first support seat 12 is arranged on the base 11, the lower end of the second support seat 14 extends into the first support seat 12, the height of the second support seat 14 extending into the first support seat 12 is adjustable, the position of the second support seat 14 and the first support seat 12 is locked by the positioning shaft 13, the upper end of the second support seat 14 is provided with a screw sleeve 15, the screw sleeve 15 is threadedly connected to the third screw rod 16, and the upper end of the third screw rod 16 is provided with a beam support plate 17.

[0047] Optionally, the outer side walls of the first support seat 12 and the second support seat 14 are respectively provided with a plurality of corresponding limiting holes from top to bottom, and the positioning shaft 13 is selectively inserted into the limiting holes.

[0048] The first support seat 12 is arranged at the upper end of the base 11; a plurality of limiting holes for adjusting the height of the second support seat 14 are arranged on one side of the first support seat 12; the positioning shaft 13 is arranged in the upper limiting hole of the first support seat 12 and can be inserted and withdrawn; the second support seat 14 is installed inside the first support seat 12, and a plurality of limiting holes are arranged on one side of the second support seat 14. The height of the second support seat 14 can be adjusted and fixed by the positioning shaft 13, the first support seat 12 and the limiting holes on one side of the second support seat 14; when the positioning shaft 13 is withdrawn from the limiting hole, the second support seat 14 can slide freely up and down in the first support seat 12 to adjust the height; when the positioning shaft 13 is inserted into the limiting hole, the position of the second support seat 14 is fixed to prevent it from sliding, and the operation is simple and quick. This design allows the height of the pier to be adjusted in a wide range as needed, thereby improving the flexibility of the assembly operation. The screw sleeve 15 is arranged at the top of the second support seat 14 and cooperates with the third screw rod 16. The height of the structural pier 1 can be finely adjusted by rotating the third spiral rod 16. The beam support plate 17 is fixedly mounted on the top of the third spiral rod 16 to support the beam during assembly. The surface of the beam support plate 17 is treated with anti-slip material to ensure that the beam is placed firmly.

[0049] The level meter 6 is used to measure the adjustable height structural pier 1 and the levelness during the assembly process to ensure that the main beam 2, the auxiliary beam 3 and the main beam 4 are at the same horizontal plane height. The welding equipment 5 includes a welding machine, a welding gun, welding materials, etc., which are used for welding between the main beam 2, the auxiliary beam 3 and the main beam 4. The welding equipment 5 must have stable welding performance and good operation convenience to meet the requirements of different welding positions and welding processes. The leveling tool includes a heating device and a heavy ballast block 7. The heating device is used to locally heat the deformed position that exceeds the specification value and restore the structure to the level through thermal stress. The heavy ballast block 7 is used to apply pressure during or after heating to further correct the structural deformation. The weld inspection and grinding tools include non-destructive testing equipment and a grinder, etc., to inspect the welds after welding to ensure that there are no defects such as cracks and pores, and use a grinder and other tools to grind the spatter around the weld to make the weld transition smooth.

[0050] In summary, the present application provides an efficient and precise method for assembling horizontal plates of large structures of offshore platforms, which not only improves assembly efficiency and quality and optimizes the work flow, but also effectively controls welding deformation and enhances structural safety, thereby ensuring the quality and stability of the overall structure, and providing an innovative and practical technical solution for the field of marine engineering. The method has broad application prospects and market value, and is particularly suitable for assembly operations of horizontal plates of large structures such as offshore platforms.

[0051] For ease of description, spatially relative terms such as "upper", "lower", "outer layer", "inner layer" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that in addition to the orientation shown in the figures, the spatial terms are intended to include different orientations of the device in use or operation. Therefore, the exemplary term "lower" can include both upper and lower orientations.

[0052] Furthermore, relational terms such as "3" and "4" etc. are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0053] Although the preferred implementation cases of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms of specific changes without departing from the scope of protection of the invention spirit and claims, which all fall within the scope of protection of the present invention.

Claims

1. A method for assembling a large-scale horizontal structural piece for an offshore platform, characterized in that: The following steps are involved: S1. Determine the configuration of the structural buttresses, and determine the number of height-adjustable structural buttresses and their placement; S2. Adjust the height of the structural piers and use a level to ensure that all structural piers are at the same level; S3. Place and fix the main beam. Place the main beam and the girders on the structural piers with adjusted heights, and perform preliminary spot welding on the main beams; S4. Place and connect the secondary beam: place the secondary beam on the main beam and connect them by spot welding; S5. Connect and weld the beam, spot weld the beam to the main beam and the auxiliary beam respectively, and then weld the beam, main beam and auxiliary beam in sequence; S6. Weld inspection and grinding: After welding is completed, all welds are strictly inspected and the spatter around the welds is polished; S7. Horizontal measurement and leveling: Use a level to measure the horizontal piece of the structure after welding, and perform leveling on the deformed position that exceeds the specification value; S8. Welding of deck to beam: Weld the deck to the main beam, secondary beam and main beam, ensuring that the weld is located on the beam and no hollow part appears.

2. The method for assembling a large-scale horizontal structure sheet for an offshore platform according to claim 1, characterized in that: The structural pier includes a base, a first support seat, a positioning shaft, a second support seat, a screw sleeve, a third screw rod and a beam support plate. The first support seat is arranged on the base, the lower end of the second support seat extends into the first support seat, the height of the second support seat extending into the first support seat is adjustable, the position of the second support seat and the first support seat is locked by the positioning shaft, the upper end of the second support seat is provided with a screw sleeve, the screw sleeve is threadedly connected to the third screw rod, and the upper end of the third screw rod is provided with a beam support plate.

3. The method for assembling a large-scale horizontal structure sheet for an offshore platform according to claim 2, characterized in that: The outer side walls of the first support seat and the second support seat are respectively provided with a plurality of corresponding limiting holes from top to bottom, and the positioning shaft is selectively inserted into the limiting holes.

4. The method for assembling a large-scale horizontal structure sheet for an offshore platform according to claim 3, characterized in that: In step S2, a level is used to measure the height of the structural piers, and fine-tuning is performed through the third screw rod to ensure that the main beam, secondary beam and main beam are on the same horizontal plane.

5. The method for assembling a large-scale horizontal structure for an offshore platform according to claim 1, characterized in that: In step S7, the leveling method includes heating with a fire and ballast blocks with heavy objects.

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