Temporary mooring hawse pipe support base for sea work converted ship and temporary mooring design method

Abstract

The application discloses a temporary anchorage chain pipe support base of a marine engineering refitted ship, which comprises a bottom plate, a side wall plate, a rear wall plate, a front wall plate, a middle rib plate, a rear inclined wall plate, a front inclined wall plate, a rear top plate and a front top plate, the bottom plate, the side wall plate, the rear wall plate, the front wall plate and the middle rib plate are fixedly connected together, the rear inclined wall plate is connected with the side wall plate and the rear wall plate, the front inclined wall plate is connected with the side wall plate and the front wall plate, the rear top plate is connected on the rear wall plate and the rear inclined wall plate, and the front top plate is connected on the front wall plate and the front inclined wall plate. The temporary anchorage chain pipe support base of the marine engineering refitted ship and the temporary anchorage design method can avoid the dynamic load of the anchor chain from causing strength damage to the hull plate, can make the rigidity and stability of the base structure meet the use requirement, can place the newly-added anchor chain pipe outside the hull during refitting design and can strengthen the design, can reduce the damage to the original ship structure due to not penetrating through the ship structure, can reduce the construction difficulty, and can greatly save the construction period.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship refitting, in particular to a temporary anchorage chain pipe support base of an offshore refitted ship and a temporary anchorage design method. BACKGROUND

[0002] The chain pipe is a passage for the anchor chain when the ship is anchoring, and is used to store the anchor when the ship is sailing. In order to save the cost and production period of the ship body, a 300,000-ton oil tanker is usually selected as the FPSO ship body structure. Considering the influence of wind, wave and current, in order to minimize the stress on the ship body, some ships use an external turret mooring system. The bow structure of the original ship is refitted into a support structure of the external turret mooring system, and the original ship anchoring system is no longer used. Due to the characteristics of the offshore special refitted ship that some functional modules need to be refitted in multiple shipyards, the refitting process needs to be temporarily anchored in the anchorage near each shipyard, so a temporary anchoring system needs to be designed. The anchoring system should minimize the damage to the original ship structure, reduce the construction difficulty, save the construction period, ensure that the support structure has sufficient strength, rigidity and stability, and avoid the anchor claw from scratching the plate structure, so it is particularly important to adopt a reasonable support structure form. SUMMARY

[0003] The purpose of the present application is to provide a temporary anchorage chain pipe support base of an offshore refitted ship which is easy to install, stable, safe and does not damage the original ship structure.

[0004] The technical scheme adopted by the present application to achieve the above purpose is as follows: a temporary anchorage chain pipe support base of an offshore refitted ship, comprising a bottom plate (1), a side wall plate (2), a rear wall plate (3), a front wall plate (4), a middle rib plate (5), a rear inclined wall plate (6), a front inclined wall plate (7), a rear top plate (8) and a front top plate (9), the bottom plate (1), the side wall plate (2), the rear wall plate (3), the front wall plate (4) and the middle rib plate (5) are fixedly connected together, the rear inclined wall plate (6) is connected with the side wall plate (2) and the rear wall plate (3), the front inclined wall plate (7) is connected with the side wall plate (2) and the front wall plate (4), the rear top plate (8) is connected on the rear wall plate (3) and the rear inclined wall plate (6), and the front top plate (9) is connected on the front wall plate (4) and the front inclined wall plate (7).

[0005] Two bottom plate reinforcing flat irons (10) are arranged on the upper part of the bottom plate (1).

[0006] A side elbow plate (14) is arranged on the outside of the side wall plate (2).

[0007] Three second horizontal reinforcing ribs (12) are arranged on the front part of the rear wall plate (3).

[0008] Three third horizontal reinforcing ribs (13) are arranged on the rear part of the front wall plate (4).

[0009] The middle rib plate (5) is provided with a first horizontal reinforcing rib (11) at the rear part and two manholes (17) at the lower part.

[0010] The rear inclined wall plate (6) is provided with a rear inclined elbow plate (15) in abutment.

[0011] The front inclined wall plate (7) is provided with a front inclined elbow plate (16) in abutment.

[0012] Another technical scheme adopted by the application is a temporary anchoring design method of a temporary anchoring chain cylinder support base of a marine engineering converted ship, comprising the following steps:

[0013] a. When the converted design is performed, the newly added chain cylinder is placed outside the ship body, and the chain cylinder is subjected to strengthening design;

[0014] b. According to the equipment layout drawing, modeling design is performed through AVEVA MRAINE, while ensuring that the fluke does not impact the ship outer plate during the anchoring and unanchoring process, the layout area of the chain cylinder support base assembly is reduced;

[0015] c. After the modeling is completed, the strength of the chain cylinder support base is checked, after the checking is passed, the strength of the side plate structure in the area where the chain cylinder support base is located is checked again, so as to ensure that the total strength of the structure in the area meets the relevant requirements of the specification.

[0016] The temporary anchoring chain cylinder support base and the temporary anchoring design method of the marine engineering converted ship can meet the dynamic load generated by the chain when the ship is at anchor, and effectively transmit the load to the outer plate structure, so as to avoid the strength damage of the dynamic load of the chain to the outer plate of the ship body, and the chain cylinder base structure form and size are optimized and designed in combination with the characteristics of the side plate structure, so that the rigidity and stability of the base structure meet the use requirements, the newly added chain pipe is placed outside the ship body during the converted design, and the chain pipe is subjected to strengthening design, since the chain pipe does not pass through the ship body structure, the original ship structure is reduced, the construction difficulty is reduced, and the construction period is greatly saved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a support base structure schematic view of the temporary anchoring chain cylinder support base and the temporary anchoring design method of the marine engineering converted ship.

[0018] In the figure: 1, bottom plate; 2, side wall plate; 3, rear wall plate; 4, front wall plate; 5, middle rib plate; 6, rear inclined wall plate; 7, front inclined wall plate; 8, rear top plate; 9, front top plate; 10, bottom plate reinforcing flat iron; 11, first horizontal reinforcing rib; 12, second horizontal reinforcing rib; 13, third horizontal reinforcing rib; 14, side elbow plate; 15, rear inclined elbow plate; 16, front inclined elbow plate; 17, manhole. DETAILED DESCRIPTION

[0019] As Figure 1As shown, the temporary anchoring anchor chain cylinder support base of the marine refitted ship comprises a bottom plate 1, a side wall plate 2, a rear wall plate 3, a front wall plate 4, a middle rib plate 5, a rear inclined wall plate 6, a front inclined wall plate 7, a rear top plate 8 and a front top plate 9, the bottom plate 1, the side wall plate 2, the rear wall plate 3, the front wall plate 4 and the middle rib plate 5 are fixedly connected together, the rear inclined wall plate 6 is connected with the side wall plate 2 and the rear wall plate 3, the front inclined wall plate 7 is connected with the side wall plate 2 and the front wall plate 4, the rear top plate 8 is connected on the rear wall plate 3 and the rear inclined wall plate 6, the front top plate 9 is connected on the front wall plate 4 and the front inclined wall plate 7, two bottom plate reinforcing flat irons 10 are arranged on the upper portion of the bottom plate 1, a side elbow plate 14 is arranged on the outside of the side wall plate 2, three second horizontal reinforcing ribs 12 are arranged on the front portion of the rear wall plate 3, three third horizontal reinforcing ribs 13 are arranged on the rear portion of the front wall plate 4, a first horizontal reinforcing rib 11 is arranged on the rear portion of the middle rib plate 5, two manholes 17 are arranged on the lower portion, a rear inclined elbow plate 15 is butt-jointed on the rear inclined wall plate 6, a front inclined elbow plate 16 is butt-jointed on the front inclined wall plate 7, and the outer surfaces of the above-mentioned 1-16 parts are sprayed with anti-seawater corrosion paint; the manufacturing and installation process comprises the following steps: blanking and cutting, the two manholes 17 are cut out at the same time when the blanking and cutting are performed, the parts are transported to a prefabrication site, the two bottom plate reinforcing flat irons 10 are installed on the bottom plate 1, the side elbow plate 14 is installed on the side wall plate 2, the three second horizontal reinforcing ribs 12 are installed on the rear wall plate 3, the three third horizontal reinforcing ribs 13 are installed on the front wall plate 4, the first horizontal reinforcing rib 11 is installed on the middle rib plate 5, the rear inclined elbow plate 15 is butt-jointed on the rear inclined wall plate 6, and the front inclined elbow plate 16 is butt-jointed on the front inclined wall plate 7, the installation method is that after the installation of each group is completed, the group installation is performed, the bottom plate 1 is taken as a base surface and is fixed, the side wall plate 2, the rear wall plate 3, the front wall plate 4 and the middle rib plate 5 are installed, then the rear inclined wall plate 6 and the front inclined wall plate 7 are installed, the rear top plate 8 and the front top plate 9 are continuously installed, after the overall installation is completed, the marine anti-corrosion paint is sprayed, the hull and the plating and the anchor chain cylinder are closed, after the closing and the plating are fixed, the permanent process holes are arranged on the corresponding plating, and the inside is entered through the manholes 17 to be welded, so that the installation is completed; the temporary anchoring design method of the temporary anchoring anchor chain cylinder support base of the marine refitted ship comprises the following steps: a, when the refitting design is performed, the newly added anchor chain cylinder is placed on the ship body, and the anchor chain cylinder is strengthened and designed, since the anchor chain cylinder does not pass through the ship body structure, the original ship structure is reduced to be damaged, the construction difficulty is reduced, and the construction period is greatly saved; b, according to the equipment layout drawing, the modeling detailed design is performed through AVEVA MRAINE, while the anchor jaw is prevented from colliding with the ship plating during the anchoring and releasing processes, the arrangement area of the anchor chain cylinder support base assembly can be as small as possible; c, after the modeling is completed, the strength of the base is checked, after the checking is passed, the strength of the side plating structure in the area where the base is arranged is checked again, and the total strength of the structure in the area is ensured to meet the relevant requirements of the specification; the temporary anchoring design method and the anchor chain cylinder support base of the marine refitted ship adopt the welding technology except as otherwise specified, the part in contact with the anchor chain cylinder and the plating is slowly welded, and after the part is adjusted and positioned with the anchor chain cylinder and the plating, the welding is completed.

Claims

1. A temporary mooring hawse pipe support base for a marine conversion vessel, characterised in that: It includes bottom plate (1), side wall plate (2), back wall plate (3), front wall plate (4), middle rib plate (5), back inclined wall plate (6), front inclined wall plate (7), back top plate (8) and front top plate (9), the bottom plate (1), side wall plate (2), back wall plate (3), front wall plate (4) and middle rib plate (5) are fixedly connected together, the back inclined wall plate (6) is connected with side wall plate (2) and back wall plate (3), the front inclined wall plate (7) is connected with side wall plate (2) and front wall plate (4), the back top plate (8) is connected on back wall plate (3) and back inclined wall plate (6), the front top plate (9) is connected on front wall plate (4) and front inclined wall plate (7), two bottom plate reinforcing flat irons (10) are installed on the bottom plate (1) respectively, a side elbow plate (14) is installed on the side wall plate (2), three second horizontal reinforcing ribs (12) are installed on the back wall plate (3), three third horizontal reinforcing ribs (13) are installed on the front wall plate (4), a first horizontal reinforcing rib (11) is installed on the middle rib plate (5), a back inclined elbow plate (15) is butt-jointed on the back inclined wall plate (6), a front inclined elbow plate (16) is butt-jointed on the front inclined wall plate (7), the shipbuilding berth is folded with the outer plate and the anchor chain cylinder, after being fixed with the outer plate, permanent process holes are formed on the corresponding outer plate, and welding is carried out through the manhole (17) to complete the installation, when the retrofit design is carried out, the newly added anchor chain cylinder is placed outside the ship body, and the anchor chain cylinder is strengthened, since it does not pass through the ship body structure, the original ship structure is reduced.

2. A temporary mooring hawse pipe support base for a converted ship according to claim 1, characterised in that: The bottom plate (1) is provided with two bottom plate reinforcing flat irons (10) on the upper part.

3. A temporary mooring hawse pipe support base for a converted ship according to claim 1, characterised in that: The side wall plate (2) is provided with a side elbow plate (14) on the outside.

4. A temporary mooring hawse pipe support base for a converted ship according to claim 1, characterised in that: The back wall plate (3) is provided with three second horizontal reinforcing ribs (12) on the front part.

5. A temporary mooring hawse pipe support base for a converted ship according to claim 1, characterised in that: The front wall plate (4) is provided with three third horizontal reinforcing ribs (13) on the back part.

6. A temporary mooring hawse pipe support base for a converted ship according to claim 1, characterised in that: The middle rib plate (5) is provided with a first horizontal reinforcing rib (11) on the back part and two manholes (17) on the lower part.

7. A temporary mooring hawse pipe support base for a converted ship according to claim 1, characterised in that: The back inclined wall plate (6) is provided with a back inclined elbow plate (15) in butt-joint.

8. A temporary mooring hawse pipe support base for a converted ship according to claim 1, characterised in that: The front inclined wall plate (7) is provided with a front inclined elbow plate (16) in butt-joint.

9. A method of temporary mooring design of a temporary mooring chock support base of a sea going converted ship as claimed in claim 1, wherein, It includes the following steps a. When the retrofit design is carried out, the newly added anchor chain cylinder is placed outside the ship body, and the anchor chain cylinder is strengthened; b. According to the equipment layout, modeling design is carried out through AVEVA MRAINE, while ensuring that the anchor claw does not hit the ship outer plate during the process of winding and unwinding the anchor, the arrangement area of the anchor chain cylinder support base assembly is reduced; c. After the modeling is completed, the strength of the anchor chain cylinder support base is checked, and after the checking is passed, the strength of the side outer plate structure in the area of the anchor chain cylinder support base is checked again, to ensure that the total strength of the structure in the area meets the relevant requirements of the specification.

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