Ship building method with overall embedded block

Abstract

The invention relates to a block overall embedded type ship building method. The method comprises the following steps that S1, process requirements are determined; s2, hull structure analysis and segmentation; s3, subsection construction: dividing each subsection into a plurality of assemblies, and respectively constructing and folding; a platform jointed board in a cabin section is pulled open by 10 mm through a broken board seam; three sections from a platform to a main deck area are totally assembled to form a total section, the two sections located on the two sides respectively add 10mm margins towards the outboard, the head and the tail respectively add 5mm margins, and a 10mm gap is formed between a section main deck plate splicing seam located in the middle in the ship length direction; s4, a carrying stage: carrying out precise control on a block carrying opening, matching the block carrying opening with the peripheral data of the block, trimming and aligning, and enabling the maximum gap to be less than or equal to 20mm; according to the invention, through a mode of reserving a subsection above the switchboard, after peripheral carrying is completed, the block is integrally hoisted into the box for embedded carrying, so that the carrying period is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of ship construction, and in particular to a method for building a ship with integrally embedded sections. Background Art

[0002] The full-revolving crane can be rotated through the turntable, and its maneuverability is much better than that of a fixed crane, especially when transferring and lifting heavy objects on both sides of a crane ship. Another advantage of the full-revolving crane is the safety of dispatching. When a crane ship is dispatching (navigating or towing), the boom of the fixed crane can only be laid down and extended outside the ship because it cannot be rotated; and it is only held by ropes, which is not fixed firmly. When dispatching at sea, it vibrates and shakes violently, with great impact force, and is prone to accidents. When a full-revolving crane ship is dispatched, the boom can be turned inside the ship and placed on a special shelf, and other means can be used to make the crane and the hull firmly integrated, so that it can be dispatched and used globally. Therefore, although this type of crane has a complex structure, high lifting cost, and high requirements for ships, due to its irreplaceable superiority, it is increasingly in demand in offshore platforms and offshore engineering hoisting and disassembly operations.

[0003] my country's early large crane ships, such as "Marine Oil 201" and "Dehe", mainly serve the offshore oil industry. Some ship types share the platform with the pipe laying system, with a small deck area and limited crane operations. Other crane ships have large lifting capacity, such as "Hua Tianlong", "Chuangli", "Huaxi 5000", etc., with a maximum lifting capacity of 4500t, but a small lifting height. Their main function is to assist oil and gas, and it is difficult to meet the lifting requirements of high wind power foundations such as super-large suction cylinders and single piles. To meet this demand, a domestically advanced 5000t full-revolving crane ship was developed, which can adapt to the complex sea conditions in China's waters such as the South China Sea and the East China Sea, and meet the construction of 12MW wind turbine single pile foundations (including conductor pipe racks), booster station installation, large offshore structure installation and other maritime projects in offshore areas.

[0004] At present, domestic ship main engines are mostly made from foreign brands. However, the production cycle of foreign main engines is generally long. In addition, due to the complex domestic and international conditions, in order to better promote the construction progress and fulfill the construction cycle, it is necessary to optimize the conventional segmented construction and sequential loading process.

[0005] Therefore, the present invention proposes a method for building a ship with integrally embedded sections to solve the above problems. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a method for building a ship with an integrally embedded main section. By reserving sections above the main engine, after the surrounding loading is completed, the main section is hoisted into the ship as a whole for embedded loading, thereby shortening the loading period.

[0007] In order to solve the above technical problems, the technical solution of the present invention is: a method for building a ship with integrally embedded sections, the innovation of which is: comprising the following steps: S1. Determination of process requirements: Based on the three-dimensional model, determine that the maximum opening size of the host installation platform meets the host hoisting requirements and meets the overall embedding process requirements of the total section; S2. Hull structure analysis and segmentation: The main deck of the hull is a single-layer connecting deck. A full-slewing crane is installed at the stern above the main deck. The forecastle and superstructure are installed at the bow. The main deck is divided into multiple watertight compartments by watertight transverse bulkheads. From the bow to the stern, there are bow ballast tanks, bow thruster tanks, engine rooms, auxiliary equipment compartments, fresh water tanks, drinking water tanks, oil tanks, ballast tanks, stern positioning winch compartments, rigging compartments, stern pump compartments, and stern thruster compartments. A platform for installing the main engine is installed in the engine room. The forecastle and superstructure are located above the engine room. A double bottom is installed at the bottom of the hull for loading ballast water tanks, lubricating oil tanks, bilge water tanks, sewage tanks, and dirty oil tanks. The platform to main deck area is divided into one main section, and the main section is divided into three sections along the ship width direction. The forecastle area, superstructure and double bottom are divided into separate sections. The cylinder of the full-slewing crane is divided into four sections. Other areas of the hull are divided into sections in sequence according to the distribution of watertight compartments. S3, segmented construction: each segment is divided into multiple assemblies, and then assembled and constructed separately; The platform panels in the cabin section are spliced ​​using the broken board seams, and the board seams are opened 10mm; The three sections from the platform to the main deck area are assembled into a master section. During the assembly, the relevant outfitting parts and equipment are put into the cabin in advance. The two sections on both sides are added with a 10mm margin to the outside of the side, and the fore and aft are added with a 5mm margin. The main deck joints of the middle section are opened with a 10mm gap in the length direction of the ship; Assemble the four sections of the cylinder of the full-slewing crane; S4, loading stage: the double bottom sections and watertight compartment sections are loaded sequentially on the same frame to form the main hull, and an opening for loading the entire section is formed on the main hull; The mounting opening of the total section shall be precisely controlled. The mounting opening of the total section shall be trimmed and flushed after matching with the peripheral data of the total section, and the maximum gap shall be ≤20mm; After the main engine arrives, it is hoisted onto the platform of the main hull and fixed, and then the main section is hoisted, positioned, and welded; Carry the first floor area sections in sequence; Adjust the superstructure segmental joints to be consistent with the forecastle area segmental joints, and load the superstructure segments in sequence; Finely adjust and calibrate the cylinder of the fully revolving crane after the sections are assembled to ensure the overall roundness of the cylinder before loading.

[0008] Furthermore, the main hull adopts a longitudinal frame structure, and a transverse frame structure is adopted locally according to the line type; The main deck has no beam arch and sheer arc, the whole ship is straight, the deck of the main deck is arranged longitudinally, the deck longitudinals are supported by the deck transverse beams and connected longitudinally, and the spacing between the deck transverse beams is 2.4m; The main hull outer plate strong ribs and bottom ribs are arranged in the plane of the deck strong transverse beam to form the transverse strong frame of the hull; The platform in the engine room adopts a longitudinal frame structure. The spacing between the platform longitudinals is arranged according to the longitudinals of the main deck. The platform deck is equipped with strong transverse beams to support the longitudinals in the transverse strong frame platform of the hull.

[0009] Furthermore, the steel used in the segmented construction is pre-treated before cutting, and is coated with anti-rust paint for protection by high-pressure airless spraying. During the spraying process, a wet film thickness gauge is used to measure and ensure the thickness of the paint film.

[0010] Furthermore, the steel used for the segmented construction is shot blasted after cutting, and each sharp edge is ground to an arc with a radius of at least 2 mm.

[0011] Furthermore, all components of the main hull are welded by double-sided continuous welding, and for the high stress area structure of the main hull, a beveled full penetration welding method is adopted.

[0012] Furthermore, the high stress area structure of the main hull includes the main crane seat and reinforcement, shelf reinforcement, deck crane base reinforcement, full-turn propeller and motor reinforcement, working anchor winch reinforcement, guide reinforcement, motor seat reinforcement, main deck and side top column plate.

[0013] Furthermore, when constructing the four segments of the cylinder of the full-revolving crane in step S3, the internal and external structures are strictly controlled to ensure the relative position of the cylinder and the structure, and high-precision measuring equipment is used to measure the diameter, length and curvature of each segment to ensure that the geometric shape and size of each segment meet the design requirements. When assembling the four segments of the cylinder of the full-revolving crane, attention is always paid to the precision control of the segment connections to ensure the flatness and roundness of the segment connections.

[0014] The advantages of the present invention are: (1) The method of the present invention divides the area between the platform and the main deck into blocks, and divides the blocks into three sections and then assembles them. By controlling the accuracy and margin trimming of the blocks before embedding and loading, and precisely controlling the size of the loading opening, the accuracy requirements of the overall embedding and loading are met. The outfitting parts and equipment in the blocks are pre-buried in the cabin in advance, and the loading of the main hull is completed in advance. After the main engine is hoisted into place, the blocks are hoisted as a whole into the loading opening formed by the main hull. Compared with the conventional method of loading in sequence and waiting for the arrival of the main engine, the method effectively shortens the construction period.

[0015] (2) The main hull and the platform in the cabin of the present invention both adopt a longitudinal frame structure, and the main deck is not provided with a beam arch and a sheer arc. The entire ship is straight, and the deck of the main deck is arranged longitudinally, which is conducive to the precision control of the segment loading and the overall precision control of the platform to the main deck area.

[0016] (3) The present invention precisely controls the paint film thickness and shot blasting size of the steel used to construct the main hull, creating favorable conditions for improving the mounting accuracy.

[0017] (4) In the present invention, double-sided continuous welding is adopted for all components of the main hull. For the high stress area structure of the main hull, a beveled full penetration welding method is adopted to ensure the structural strength of the main hull and effectively avoid welding deformation.

[0018] (5) Before loading, the cylinder of the full-revolving crane in the present invention can control the size, flatness and roundness of the cylinder in advance, thereby avoiding repeated adjustment and trimming during subsequent loading, which is beneficial to improving the loading speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Figure 1 The present invention is a flow chart of the method for constructing a ship with integrally embedded sections. DETAILED DESCRIPTION

[0021] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0022] Example like Figure 1 As shown, this embodiment provides a method for building a ship with integrally embedded sections, comprising the following steps: S1. Determination of process requirements: Based on the three-dimensional model, determine that the maximum opening size of the host installation platform meets the host hoisting requirements and meets the overall embedding process requirements of the total section; S2. Hull structure analysis and segmentation: The main hull adopts a longitudinal frame structure, and a transverse frame structure is adopted locally according to the line type; the main hull outer plate strong ribs and bottom ribs are arranged in the plane of the deck strong transverse beam to form the transverse strong frame of the hull; the main deck of the hull is a single-layer connecting deck, the main deck has no beam arch and sheer arc, the whole ship is straight, the deck of the main deck is arranged longitudinally, the deck longitudinal bones are supported by the deck strong transverse beam and connected longitudinally, and the deck strong transverse beam spacing is 2.4m; a full-slewing crane is installed at the stern above the main deck, the forecastle and superstructure are installed at the bow, and the main deck is divided into multiple watertight bulkheads by watertight transverse bulkheads. The cabin sections, from bow to stern, are bow ballast tank, bow thruster cabin, engine room, auxiliary equipment cabin, fresh water tank, drinking water tank, oil tank, ballast tank, stern positioning winch cabin, rigging cabin, stern pump cabin and stern thruster cabin. The engine room is equipped with a platform for installing the main engine. The platform in the engine room adopts a longitudinal frame structure. The spacing between the platform longitudinals is arranged according to the longitudinals of the main deck. The platform deck is equipped with strong transverse beams to support the longitudinals in the transverse strong frame platform of the hull. The forecastle and superstructure are located above the engine room. A double bottom is arranged at the bottom of the hull for loading ballast water tanks, lubricating oil tanks, bilge water tanks, sewage tanks and dirty oil tanks.

[0023] The platform to main deck area is divided into one main section, and the main section is divided into three sections along the ship width direction. The forecastle area, superstructure and double bottom are divided into separate sections. The cylinder of the full-slewing crane is divided into four sections. Other areas of the hull are divided into sections in sequence according to the distribution of watertight compartments. S3, segmented construction: each segment is divided into multiple assemblies, and then assembled and constructed separately; When constructing in sections, the steel used is pre-treated before cutting, and anti-rust paint is applied by high-pressure airless spraying. During the spraying process, a wet film thickness gauge is used to measure to ensure the thickness of the paint film. After cutting, the steel is shot blasted and each sharp edge is polished to an arc with a radius of at least 2mm; When constructing the four sections of the cylinder of the full-slewing crane, the internal and external structures are strictly controlled to ensure the relative position of the cylinder and the structure, and high-precision measuring equipment is used to measure the diameter, length and curvature of each section to ensure that the geometric shape and size of each section meet the design requirements. When assembling the four sections of the cylinder of the full-slewing crane, attention is always paid to the precision control of the section connection to ensure the flatness and roundness of the section connection; The platform panels in the cabin section are spliced ​​using the broken board seams, and the board seams are opened 10mm; The three sections from the platform to the main deck area are assembled into a master section. During the assembly, the relevant outfitting parts and equipment are put into the cabin in advance. The two sections on both sides are added with a 10mm margin to the outside of the side, and the fore and aft are added with a 5mm margin. The main deck joints of the middle section are opened with a 10mm gap in the length direction of the ship; Assemble the four sections of the cylinder of the full-slewing crane; S4, loading stage: the double bottom sections and watertight compartment sections are loaded sequentially on the same frame to form the main hull, and an opening for loading the entire section is formed on the main hull; The mounting opening of the total section shall be precisely controlled. The mounting opening of the total section shall be trimmed and flushed after matching with the peripheral data of the total section, and the maximum gap shall be ≤20mm; After the main engine arrives, it is hoisted onto the platform of the main hull and fixed, and then the main section is hoisted, positioned, and welded; Carry the first floor area sections in sequence; Adjust the superstructure segmental joints to be consistent with the forecastle area segmental joints, and load the superstructure segments in sequence; Finely adjust and calibrate the cylinder of the fully revolving crane after the sections are assembled to ensure the overall roundness of the cylinder before loading.

[0024] In this embodiment, all components of the main hull are welded continuously on both sides, and for the high stress area structure of the main hull, full penetration welding with a bevel is adopted, wherein the high stress area structure of the main hull includes the main crane seat and reinforcement, shelf reinforcement, deck crane base reinforcement, full-revolving propeller and motor reinforcement, working anchor winch reinforcement, guide reinforcement, motor seat reinforcement, main deck and side top column plate.

[0025] The method of the present invention divides the area between the platform and the main deck into blocks separately, and divides the blocks into three sections and then assembles them separately. By controlling the accuracy and margin trimming of the blocks before embedding and loading, and precisely controlling the size of the loading opening, the accuracy requirements of the overall embedding and loading are met, the outfitting parts and equipment in the blocks are pre-buried in the cabin in advance, the loading of the main hull is completed in advance, and after the main engine is hoisted into place, the blocks are hoisted as a whole into the loading opening formed by the main hull. Compared with the conventional method of loading in sequence during which the main engine needs to be waited for to arrive, the method effectively shortens the construction period.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for building a ship with integrally embedded sections, characterized in that: The following steps are involved: S1. Determination of process requirements: Based on the three-dimensional model, determine that the maximum opening size of the host installation platform meets the host hoisting requirements and meets the overall embedding process requirements of the total section; S2. Hull structure analysis and segmentation: The main deck of the hull is a single-layer connecting deck. A full-slewing crane is installed at the stern above the main deck. The forecastle and superstructure are installed at the bow. The main deck is divided into multiple watertight compartments by watertight transverse bulkheads. From the bow to the stern, there are bow ballast tanks, bow thruster tanks, engine rooms, auxiliary equipment compartments, fresh water tanks, drinking water tanks, oil tanks, ballast tanks, stern positioning winch compartments, rigging compartments, stern pump compartments, and stern thruster compartments. A platform for installing the main engine is installed in the engine room. The forecastle and superstructure are located above the engine room. A double bottom is installed at the bottom of the hull for loading ballast water tanks, lubricating oil tanks, bilge water tanks, sewage tanks, and dirty oil tanks. The platform to main deck area is divided into one main section, and the main section is divided into three sections along the ship width direction. The forecastle area, superstructure and double bottom are divided into separate sections. The cylinder of the full-slewing crane is divided into four sections. Other areas of the hull are divided into sections in sequence according to the distribution of watertight compartments. S3, segmented construction: each segment is divided into multiple assemblies, and then assembled and constructed separately; The platform panels in the cabin section are spliced ​​using the broken board seams, and the board seams are opened 10mm; The three sections from the platform to the main deck area are assembled into a master section. During the assembly, the relevant outfitting parts and equipment are put into the cabin in advance. The two sections on both sides are added with a 10mm margin to the outside of the side, and the fore and aft are added with a 5mm margin. The main deck joints of the middle section are opened with a 10mm gap in the length direction of the ship; Assemble the four sections of the cylinder of the full-slewing crane; S4, loading stage: the double bottom sections and watertight compartment sections are loaded sequentially on the same frame to form the main hull, and an opening for loading the entire section is formed on the main hull; The mounting opening of the total section shall be precisely controlled. The mounting opening of the total section shall be trimmed and flushed after matching with the peripheral data of the total section, and the maximum gap shall be ≤20mm; After the main engine arrives, it is hoisted onto the platform of the main hull and fixed, and then the main section is hoisted, positioned, and welded; Carry the first floor area sections in sequence; Adjust the superstructure segmental joints to be consistent with the forecastle area segmental joints, and load the superstructure segments in sequence; Finely adjust and calibrate the cylinder of the fully revolving crane after the sections are assembled to ensure the overall roundness of the cylinder before loading.

2. The method for building a ship with integrally embedded sections according to claim 1, characterized in that: The main hull adopts a longitudinal frame structure, and a transverse frame structure is adopted locally according to the line shape; The main deck has no beam arch and sheer arc, the whole ship is straight, the deck of the main deck is arranged longitudinally, the deck longitudinals are supported by the deck transverse beams and connected longitudinally, and the spacing between the deck transverse beams is 2.4m; The main hull outer plate strong ribs and bottom ribs are arranged in the plane of the deck strong transverse beam to form the transverse strong frame of the hull; The platform in the engine room adopts a longitudinal frame structure. The spacing between the platform longitudinals is arranged according to the longitudinals of the main deck. The platform deck is equipped with strong transverse beams to support the longitudinals in the transverse strong frame platform of the hull.

3. The method for building a ship with integrally embedded sections according to claim 1, characterized in that: The steel used in the segmented construction is pre-treated before cutting and is coated with anti-rust paint by high-pressure airless spraying. During the spraying process, a wet film thickness gauge is used to measure and ensure the thickness of the paint film.

4. The method for building a ship with integrally embedded sections according to claim 1, characterized in that: The steel used for the segmented construction is shot blasted after cutting, and each sharp edge is ground to an arc with a radius of at least 2 mm.

5. The method for building a ship with integrally embedded sections according to claim 1, characterized in that: All components of the main hull are welded continuously on both sides, and for the high stress area structure of the main hull, a beveled full penetration welding method is adopted.

6. The method for building a ship with integrally embedded sections according to claim 5, characterized in that: The high stress area structure of the main hull includes the main crane base and reinforcement, shelf reinforcement, deck crane base reinforcement, full-rotation propeller and motor reinforcement, working anchor winch reinforcement, guide reinforcement, motor base reinforcement, main deck and side top column plate.

7. The method for building a ship with integrally embedded sections according to claim 1, characterized in that: When constructing the four segments of the cylinder of the full-revolving crane in step S3, the internal and external structures are strictly controlled to ensure the relative position of the cylinder and the structure, and high-precision measuring equipment is used to measure the diameter, length and curvature of each segment to ensure that the geometric shape and size of each segment meet the design requirements. When assembling the four segments of the cylinder of the full-revolving crane, attention is always paid to the precision control of the segment connections to ensure the flatness and roundness of the segment connections.

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