Temporary anchoring hawse pipe supporting base of maritime work refitted ship and temporary anchoring design method

Abstract

The invention discloses a temporary anchoring hawse pipe supporting base of a maritime work 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, and the front top plate is connected with 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 to the rear wall plate and the rear inclined wall plate, and the front top plate is connected to the front wall plate and the front inclined wall plate. According to the temporary anchoring hawse pipe supporting base of the maritime work refitted ship and the temporary anchoring design method, the situation that dynamic loads of an anchor chain damage the strength of a ship body outer plate is avoided, the rigidity and stability of the base structure meet the use requirements, a newly-added hawse pipe is placed outside the ship body during refitting design, the newly-added hawse pipe is subjected to reinforced design, and the service life of the ship body is prolonged. As no hull structure is passed, damage to the original ship structure is reduced, the construction difficulty is reduced, and the construction period is greatly shortened.

Description

Technical Field

[0001] The invention relates to the technical field of ship modification, and in particular to a temporary anchoring anchor chain barrel supporting base of a marine engineering modified ship and a temporary anchoring design method. Background Art

[0002] The anchor chain barrel is the channel for the anchor chain when the ship is lifting and dropping anchor, and is used to store the anchor when the ship is sailing. In order to save a lot of hull manufacturing costs and production period, 300,000-class oil tankers are usually modified as FPSO hull structures. Considering the influence of wind, waves and currents, in order to minimize the force on the hull, some ships use an external turret mooring system. The original bow hull structure is transformed into an external turret mooring system support structure, and the original ship anchoring system is no longer used. Due to the characteristics that some functional modules of the marine special modified ship need to be modified in multiple shipyards, the modification process requires temporary mooring in the anchorage near each shipyard, so it is necessary to design a temporary mooring system. This anchoring system minimizes damage to the original ship structure, reduces construction difficulty, saves construction period, and ensures that the support structure has sufficient strength, rigidity and stability, and avoids the anchor claws from scraping the outer plate structure, so it is particularly important to adopt a reasonable support structure form. Summary of the invention

[0003] The purpose of the present invention is to provide a temporary anchor chain barrel supporting base for an offshore modified ship which is simple to install, has good stability, high safety and does not damage the original ship structure.

[0004] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a temporary anchor chain barrel support base for a marine engineering conversion 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 oblique wall plate (6), a front oblique wall plate (7), a rear top plate (8) and a front top plate (9), wherein 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 oblique wall plate (6) is connected to the side wall plate (2) and the rear wall plate (3), the front oblique wall plate (7) is connected to the side wall plate (2) and the front wall plate (4), the rear top plate (8) is connected to the rear wall plate (3) and the rear oblique wall plate (6), and the front top plate (9) is connected to the front wall plate (4) and the front oblique 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 outside the side wall plate (2).

[0007] The front part of the rear wall plate (3) is provided with three second horizontal reinforcing ribs (12).

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

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

[0010] The rear inclined wall plate (6) is butt-jointed with a rear inclined elbow plate (15).

[0011] The front inclined wall plate (7) is butt-jointed with a front inclined elbow plate (16).

[0012] Another technical solution adopted by the present invention to achieve the above-mentioned purpose is: a temporary anchoring design method for a temporary anchoring anchor chain barrel support base of a marine engineering conversion ship, comprising the following steps: a. During the modification design, the newly added anchor chain barrel is placed outside the hull and strengthened; b. According to the equipment layout drawing, modeling and design were carried out through AVEVA MRAINE to reduce the layout area of ​​the anchor chain barrel support base assembly while ensuring that the anchor claw does not hit the outer plate during the process of retracting and releasing the anchor; c. After the modeling is completed, the strength of the anchor chain tube support base is checked. After the check is passed, the strength of the side outer plate structure in the area where the anchor chain tube support base is located is checked again to ensure that the total structural strength of this area meets the relevant requirements of the specification.

[0013] The present invention discloses a temporary anchoring chain barrel supporting base and a temporary anchoring design method for a marine modified ship. When the ship is moored, the base structure strength meets the dynamic load generated by the anchor chain, and these loads are effectively transmitted to the outer plate structure, so as to avoid the dynamic load of the anchor chain from causing strength damage to the outer plate of the hull. At the same time, combined with the characteristics of the side outer plate structure, the anchor chain barrel base structure form and size are optimized to make the rigidity and stability of the base structure meet the use requirements. During the modification design, the newly added anchor chain pipe is placed outside the hull and is reinforced. Since it does not pass through the hull structure, the damage to the original ship structure is reduced, the construction difficulty is reduced, and a large amount of construction period is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a structural schematic diagram of a support base of a temporary anchor chain barrel of a marine engineering conversion ship and a temporary anchoring design method.

[0015] In the figure: 1, bottom plate; 2, side wall plate; 3, rear wall plate; 4, front wall plate; 5, middle rib plate; 6, rear oblique wall plate; 7, front oblique wall plate; 8, rear top plate; 9, front top plate; 10, bottom plate reinforcement flat iron; 11, first horizontal reinforcement rib; 12, second horizontal reinforcement rib; 13, third horizontal reinforcement rib; 14, side elbow plate; 15, rear oblique elbow plate; 16, front oblique elbow plate; 17, manhole. DETAILED DESCRIPTION

[0016] like Figure 1As shown, the temporary anchor chain barrel supporting base of the marine engineering conversion ship includes 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 oblique wall plate 6, a front oblique 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 oblique wall plate 6 is connected to the side wall plate 2 and the rear wall plate 3, the front oblique wall plate 7 is connected to the side wall plate 2 and the front wall plate 4, the rear top plate 8 is connected to the rear wall plate 3 and the rear oblique wall plate 6, the front top plate 9 is connected to the front wall plate 4 and the front oblique wall plate 7, two bottom plate reinforcing flat irons 10 are arranged on the upper part of the bottom plate 1, and the side wall plate 2 is provided with a A side bracket 14 is provided, three second horizontal reinforcing ribs 12 are provided at the front of the rear wall plate 3, three third horizontal reinforcing ribs 13 are provided at the rear of the front wall plate 4, a first horizontal reinforcing rib 11 is provided at the rear of the middle rib plate 5, two manholes 17 are provided at the lower part, a rear oblique bracket 15 is provided at the butt joint of the rear oblique wall plate 6, and a front oblique bracket 16 is provided at the butt joint of the front oblique wall plate 7. The outer surfaces of the above 1-16 components are sprayed with seawater corrosion-resistant paint; the manufacturing and installation process: cutting and cutting, cutting out the two manholes 17 together when cutting, transporting the parts to the prefabrication site, and installing the two bottom plate reinforcing flat irons 10 respectively On the bottom plate 1, install the side bracket 14 on the side wall plate 2, install the three second horizontal reinforcing ribs 12 on the rear wall plate 3, install the three third horizontal reinforcing ribs 13 on the front wall plate 4, install a first horizontal reinforcing rib 11 on the middle rib plate 5, butt-mount a rear oblique bracket 15 on the rear oblique wall plate 6, and butt-mount a front oblique bracket 16 on the front oblique wall plate 7. The installation method is that after each group is installed separately, perform the assembly installation, take the bottom plate 1 as the base surface and fix it, install the side wall plate 2, the rear wall plate 3, the front wall plate 4, the middle rib plate 5, and then install the rear oblique wall plate 6 and the front oblique wall plate 7, and then Then install the rear top plate 8 and the front top plate 9. After the overall installation is completed, spray the marine anti-corrosion paint, close the upper platform with the outer plate and the anchor chain barrel, and after closing and fixing with the outer plate, open a permanent process hole in the corresponding outer plate, and enter the interior through the manhole 17 to complete the installation by welding; the temporary anchoring design method of the anchor chain barrel support base of the offshore modified ship includes the following steps: a. During the modification design, the newly added anchor chain barrel is placed outside the hull body and is reinforced. Since it does not pass through the hull structure, it reduces the damage to the original ship structure, reduces the construction difficulty, and greatly saves the construction period; b. According to the equipment layout drawing, through AVEVA MRAINE is used for modeling and detailed design, which can minimize the layout area of ​​the anchor chain barrel support base assembly while ensuring that the anchor claw does not hit the outer plate during the process of retracting and releasing the anchor; c. After the modeling is completed, the strength of the base is checked. After the check is passed, the strength of the side outer plate structure in the area where the base is located is checked again to ensure that the total structural strength of the area meets the relevant requirements of the specification; The temporary anchoring design method and anchor chain barrel support base of this marine engineering conversion ship adopt welding technology unless otherwise specified, and the part in contact with the anchor chain barrel and the outer plate is slow welded, and the welding is completed after the alignment with the anchor chain barrel and the outer plate is adjusted.

Claims

1. A temporary anchor chain barrel support base for a marine engineering conversion ship, characterized in that: The invention 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 oblique wall plate (6), a front oblique wall plate (7), a rear top plate (8) and a front top plate (9), wherein 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 oblique wall plate (6) is connected to the side wall plate (2) and the rear wall plate (3), the front oblique wall plate (7) is connected to the side wall plate (2) and the front wall plate (4), the rear top plate (8) is connected to the rear wall plate (3) and the rear oblique wall plate (6), and the front top plate (9) is connected to the front wall plate (4) and the front oblique wall plate (7).

2. The temporary anchor chain barrel support base of a marine engineering conversion ship according to claim 1, characterized in that: Two bottom plate reinforcing flat irons (10) are arranged on the upper part of the bottom plate (1).

3. The temporary anchor chain barrel support base of a marine engineering conversion ship according to claim 1, characterized in that: A side elbow plate (14) is arranged outside the side wall plate (2).

4. The temporary anchor chain barrel support base of a marine engineering conversion ship according to claim 1, characterized in that: The front part of the rear wall plate (3) is provided with three second horizontal reinforcing ribs (12).

5. The temporary anchor chain barrel support base of a marine engineering conversion ship according to claim 1, characterized in that: Three third horizontal reinforcing ribs (13) are arranged at the rear of the front wall plate (4).

6. The temporary anchor chain barrel support base of a marine engineering conversion ship according to claim 1, characterized in that: The middle rib plate (5) is provided with a first horizontal reinforcing rib (11) at the rear and two manholes (17) at the lower portion.

7. The temporary anchor chain barrel support base of a marine engineering conversion ship according to claim 1, characterized in that: The rear inclined wall plate (6) is butt-jointed with a rear inclined elbow plate (15).

8. The temporary anchor chain barrel support base of a marine engineering conversion ship according to claim 1, characterized in that: The front inclined wall plate (7) is butt-jointed with a front inclined elbow plate (16).

9. A temporary anchoring design method for a temporary anchoring anchor chain barrel support base of a marine engineering conversion ship according to claim 1, characterized in that: The following steps are included a. During the modification design, the newly added anchor chain barrel is placed outside the hull and strengthened; b. According to the equipment layout drawing, modeling and design were carried out through AVEVA MRAINE to reduce the layout area of ​​the anchor chain barrel support base assembly while ensuring that the anchor claw does not hit the outer plate during the process of retracting and releasing the anchor; c. After the modeling is completed, the strength of the anchor chain tube support base is checked. After the check is passed, the strength of the side outer plate structure in the area where the anchor chain tube support base is located is checked again to ensure that the total structural strength of this area meets the relevant requirements of the specification.

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