CN114954832A - Main hull total segmentation building method and ship - Google Patents
Main hull total segmentation building method and ship Download PDFInfo
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- CN114954832A CN114954832A CN202210784782.7A CN202210784782A CN114954832A CN 114954832 A CN114954832 A CN 114954832A CN 202210784782 A CN202210784782 A CN 202210784782A CN 114954832 A CN114954832 A CN 114954832A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/10—Building or assembling vessels from prefabricated hull blocks, i.e. complete hull cross-sections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
Abstract
The invention relates to the technical field of ship construction, and discloses a main hull total segmentation construction method and a ship. The main hull total segmentation construction method comprises the following steps: dividing a plurality of segments according to a segment division diagram; designing a plurality of total segments, wherein each total segment comprises a plurality of the subsections; building a plurality of the subsections, and respectively combining a plurality of the subsections into a plurality of total sections; performing staged outfitting inside each general section; and hoisting all the outfitting-finished general sections to a dock for carrying. The ship is manufactured by the main hull total segmentation construction method. The main hull total segmental construction method and the ship realize total segmental construction and process forward, can meet the same standard, improve the quality standardization of the ship, reduce the potential safety hazards of various persons and equipment caused by high-density cross concentrated operation in a dock, ensure that the allocation of various resources is rationalized and efficient, and improve the production efficiency and quality.
Description
Technical Field
The invention relates to the technical field of ship construction, in particular to a main hull total segmentation construction method and a ship.
Background
The structure of the ship is complex, a plurality of sections need to be produced firstly in the production process of the ship, and then the sections are assembled. Under the existing shipbuilding condition, the dock period is too long and the production plan node cannot be ensured due to the influences of fields, large-scale hoisting equipment and construction periods used in the carrying process of the subsection and the total section. For example, the segments of the JU2000E type main hull are assembled in the dock, and the corresponding structure folding and outfitting operations are all concentrated in the dock construction period, so that high-density cross operation needs to be performed in the dock, the efficiency is low, potential safety hazards of human bodies and equipment exist, the resource utilization rate is low, the dock storage period and production plan nodes are directly or indirectly influenced, and the production efficiency is low.
Disclosure of Invention
Based on the above, the present invention aims to provide a main hull total segment building method and a ship, which can realize total segment building and process advance, can meet the same standard, improve ship quality standardization, reduce various personal and equipment safety hazards caused by high-density cross concentrated operation in a dock, rationalize and efficiently distribute various resources, and improve production efficiency and quality.
In order to achieve the purpose, the invention adopts the following technical scheme:
a main hull total segmentation building method comprises the following steps:
dividing a plurality of segments according to a segment division diagram;
designing a plurality of total segments, wherein each total segment comprises a plurality of the subsections;
building a plurality of the subsections, and respectively combining a plurality of the subsections into a plurality of total sections;
performing staged outfitting inside each general section;
and hoisting all the outfitting-finished general sections to a dock for carrying.
As a preferable mode of the construction method for the main hull total segmentation, when a plurality of the total segments are designed, all the segments are divided into 8 total segments.
As a preferable scheme of the construction method for main hull total segmentation, when a plurality of total segments are designed, each total segment is numbered as 22A, 22B, 24A, 25A, 20D, 20A, 22E and 23E.
As a preferable scheme of the construction method for the main hull total segmentation, before a plurality of segments are constructed and a plurality of segments are respectively combined into a plurality of total segments, the construction process of each segment and the total combination sequence of each total segment are compiled.
As a preferred scheme of the main hull total segmentation building method, when the building process of each segment is programmed, the structural strength of each segment is calculated, and the hoisting point and the folding position of each segment are determined.
As a preferable scheme of the construction method for the main hull total segmentation, according to the construction process of each segment and the total assembly sequence of each total segment, a gantry crane is welded above the segment and the total segment, and the segment of each total segment is folded and assembled by the gantry crane.
As a preferable scheme of the construction method for the total segmentation of the main hull, each total segment comprises 6-10 segments.
As a preferable mode of the main hull total segment construction method, the step outfitting performed inside each of the segments includes equipment sanding paint, piping closure, regional electric outfitting, and iron outfitting.
As a preferred option for a method of construction of the main hull total subsections, each of said subsections weighs no more than 800 tons.
A ship is manufactured by the main hull total segmentation construction method in any technical scheme.
The invention has the beneficial effects that:
the invention provides a main hull total segmentation construction method and a ship. In the steps, the segments are not required to be loaded to the dock for assembly, and the segments can be assembled on the platform in advance and then moved to the dock for assembly, so that the assembly process is clear, the assembly and the assembly can be orderly and orderly carried out, the time and the dock field are saved, the resource utilization rate in the dock is higher, the assembly disorder and the resource distribution inequality caused by the assembly of all the segments in the dock are avoided, and the production efficiency is improved. And the staged outfitting is moved forward to the general section, so that huge outfitting work can be completed in a segmented manner, and the workload and difficulty of the whole outfitting in the dock are reduced. The main ship body assembly can be completed only by assembling a plurality of general assemblies and the sectional outfitting sections in the dock, so that various personal safety and equipment potential safety hazards caused by high-density and cross concentrated operation in the dock are greatly reduced. The ship manufactured by adopting the main hull total segmentation construction method is more standardized, the production efficiency is higher, and the manufacturing period is shorter.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a flow chart of a method of construction of a main hull total segmentation provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of 8 total segments provided in the embodiment of the present invention.
In the figure:
1. 22A total section; 2. 22B total section; 3. 24A total section; 4. 25A total section; 5. 20D total section; 6. 20A total section; 7. 22E total section; 8. 23E total section.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1, the present embodiment provides a main hull total segmental construction method including the steps of:
dividing a plurality of segments according to a segment division diagram;
designing a plurality of total sections, wherein each total section comprises a plurality of subsections;
building a plurality of subsections, and respectively combining the subsections into a plurality of overall sections;
performing staged outfitting inside each general section;
and hoisting all the outfitting-finished general sections to a dock for carrying.
In the steps, the segments are not required to be loaded to the dock for assembly, and the segments can be assembled on the platform in advance and then moved to the dock for assembly, so that the assembly process is clear, the assembly and the assembly can be orderly and orderly carried out, the time and the dock field are saved, the resource utilization rate in the dock is higher, the assembly disorder and the resource distribution inequality caused by the assembly of all the segments in the dock are avoided, and the production efficiency is improved. And the staged outfitting is moved forward to the general section, so that huge outfitting work can be completed in a segmented manner, and the workload and difficulty of the whole outfitting in the dock are reduced. The main ship body assembly can be completed only by assembling a plurality of general assemblies and the sectional outfitting sections in the dock, so that various personal safety and equipment potential safety hazards caused by high-density and cross concentrated operation in the dock are greatly reduced. The ship manufactured by adopting the main hull total segmentation construction method is more standardized, the production efficiency is higher, and the manufacturing period is shorter.
Specifically, the step outfitting in each block includes equipment polishing paint, piping folding, regional electric outfitting, and iron outfitting. After the segmentation total assembly is taken as the block, equipment polishing paint, piping folding, regional electricity fitting-out, iron fitting-out and other staged fitting-out are directly carried out in the block on the construction platform, the block is not required to be transferred into a dock for assembly, then the whole fitting-out is carried out, the block is hoisted to the dock for assembly after the internal fitting-out of all the blocks, then the whole fitting-out is carried out, a complete main ship body is formed, the dock utilization rate is increased, the platform total segmentation can be unified and standardized, and the product quality standardization is improved.
As shown in fig. 2, in the present embodiment, when designing a total segment, all segments are divided into 8 total segments, where each total segment includes 6 to 10 segments. When the total section is divided, a plurality of related sections are divided into one total section, so that the subsequent total assembly and hoisting assembly are facilitated. The multiple gantry cranes are arranged at different positions of the platform and are arranged according to the construction of the segments and the total assembly requirements, so that 8 total assemblies can be completed in the shortest time, the resource distribution is uniform, the hoisting efficiency is improved, the waiting time of each process is reduced, the construction period is shortened, and the production efficiency is improved. Of course, in other embodiments, the number of total segments and the number of segments each total segment includes are selected based on the actual situation.
Preferably, when designing a plurality of total segments, each total segment is numbered. The construction in the process of construction and assembly is facilitated, assembly errors caused by disorder are avoided, working hours are prolonged, and the like, and the construction convenience and the standard of the main ship body are improved. And the main hulls with different models correspond to different numbers, so that the main hulls with different models can be unified and standardized, and the product quality standardization is improved. Illustratively, the 8 segments are numbered 22A segment 1, 22B segment 2, 24A segment 3, 25A segment 4, 20D segment 5, 20A segment 6, 22E segment 7 and 23E segment 8, respectively, with the arrows indicating the assembly relationship. Wherein, each number represents a relevant block of a core component, for example, 22B represents a core block related to a generator, and 6 generators complete installation and outfitting work in a platform block stage. Through the serial numbers, each block can be simply and clearly known before and after the main ship body is built, information confusion is avoided, and unified standards are convenient. Of course, in other embodiments, the number of each block can be designed according to requirements, and the numbers of the blocks of ships of different models are specifically designed according to actual conditions.
Furthermore, before a plurality of subsections are built and the subsections are respectively combined into a plurality of total subsections, the building process of each subsection and the total combination sequence of each total subsection are compiled. The construction process of each section is woven firstly, so that the construction and the assembly are convenient to carry out subsequently according to the weaving, the working efficiency is improved, the process standardization is convenient, and the arrangement of installation equipment is convenient. Specifically, when the construction process of each section is compiled, the structural strength of each section is calculated, and the hoisting point and the folding position of each section are determined. After the structural strength, the hoisting point and the folding position of each section are calculated, the assembly during the subsequent general assembly of the main section is facilitated, the hoisting is accurate, the folding is accurate, the assembly quality and efficiency are improved, and the construction process of the main ship body is standardized. And further specifically, according to the construction process of each subsection and the total assembly sequence of each general section, welding a gantry crane hoisting crane above the subsection and the general section, and utilizing a gantry crane to fold the subsection of each general section into a total assembly. And welding the hoisting crane weights of the gantry cranes at corresponding positions according to the calculated structural strength, hoisting points and folding positions, and accurately folding each subsection through the gantry cranes, so that the assembly process is smooth and accurate, the delivery period is shortened, and the production efficiency is improved.
In the embodiment, the maximum bearing range of each gantry crane is 600t-800t, so that when the segments are divided, the weight of each segment does not exceed 800t, and the condition that the gantry cranes cannot be hoisted and assembled is avoided. Of course, in other embodiments, the maximum load of the gantry crane can be set according to actual conditions, for example, the gantry crane with the maximum load of 1200t can be arranged on a suitable construction platform.
By the main hull total segmental construction method provided by the embodiment, the working procedure is moved forward, the outfitting work is moved forward to each total segment for staged outfitting, potential safety hazards of various persons and equipment caused by high-density cross concentrated operation in a dock are reduced, various resource allocation is reasonable and efficient, and the production efficiency and quality are improved. Illustratively, the construction process of 22B block 2 is as follows: firstly, dividing a plurality of subsections according to a subsection division diagram, compiling 22B the construction process of the block 2 and the total assembly sequence of the block, welding gantry crane hoisting codes above the subsections and the block, hoisting the subsections to form the block, performing staged outfitting in the block, and hoisting the block with the outfitting completed to a dock for carrying. And then 2 generators are hoisted and rotated to be positioned, the generator base is integrally polished with paint, the pipelines are folded and totaled by 87, so that 41 percent of the total installation completion amount of the main hull pipeline total section stage is completed, 2846 total sections and regional pipes are completed, 1168 multi-core pipe brackets are mounted on 103 pieces, 83 pieces are completed, 37 percent of the total regional electricity outfitting amount of the electricity outfitting pieces are completed by the electricity outfitting pieces of the main generator room (22B) total section stage, preconditions are created for the integrity of the pipeline system in the dock stage and the key system of the generator motor car, a solid foundation is laid for the integrity of the electricity outfitting pieces of the whole room, particularly the laying of the key path of a power cable of the generator, and the generator can be driven in 100 days in the dock.
The total segmental construction method of the main ship body provided by the embodiment improves the comprehensive utilization rate of the platform and the dock. Illustratively, the crane resource savings statistics in the JU2000E main hull dock are as follows:
resource saving statistics of crane in JU2000E main hull dock
The embodiment also provides a ship manufactured by the main hull total segmentation construction method. The ship manufactured by adopting the main hull total segmentation construction method is more standardized, the production efficiency is higher, and the manufacturing period is shorter.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A main hull total segmentation building method is characterized by comprising the following steps:
dividing a plurality of segments according to a segment division diagram;
designing a plurality of total segments, wherein each total segment comprises a plurality of the subsections;
building a plurality of the subsections, and respectively combining a plurality of the subsections into a plurality of total sections;
staging outfitting inside each of said headquarters;
and hoisting all the outfitting-finished general sections to a dock for carrying.
2. The method of constructing a main hull block according to claim 1, characterized in that when designing a plurality of said blocks, all said segments are divided into 8 blocks.
3. The main hull total segmentations building method of claim 2, characterized in that when designing a plurality of said segments, each of said segments is numbered 22A, 22B, 24A, 25A, 20D, 20A, 22E and 23E segments, respectively.
4. The method of constructing a main hull section according to claim 1, wherein before constructing a plurality of said segments and assembling a plurality of said segments into a plurality of said sections, respectively, a construction process of each of said segments and an assembling sequence of each of said sections are programmed.
5. The method of claim 4 wherein the structural strength of each segment is calculated to determine the lifting point and closure position of each segment during the construction process of each segment.
6. The method of constructing a main hull block according to claim 5, wherein a gantry crane is welded above said blocks and said blocks according to the construction process of each of said blocks and the total assembly sequence of each of said blocks, and said blocks of each of said blocks are assembled and assembled by said gantry crane.
7. The method of constructing a main hull block according to claim 1, wherein each block comprises 6-10 of said segments.
8. The main hull block building method according to claim 1, wherein said step outfitting inside each of said blocks includes facility sanding paint, piping closure, local electrical outfitting and iron outfitting.
9. A method of constructing a main hull total subsections in accordance with claim 1 wherein each of said subsections weighs no more than 800 tons.
10. A ship made by the method of constructing a main hull block as claimed in any one of claims 1 to 9.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116890969A (en) * | 2023-07-31 | 2023-10-17 | 招商局重工（江苏）有限公司 | Efficient and safe floating production oil storage and discharge device, construction process thereof and precision control method |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1931663A (en) * | 2006-09-30 | 2007-03-21 | 沪东中华造船(集团)有限公司 | District building and dock assembling method for small ship |
| CN102582784A (en) * | 2012-03-30 | 2012-07-18 | 南通明德重工有限公司 | Process for sectionally putting up ship berths or docks |
| CN103507913A (en) * | 2013-09-12 | 2014-01-15 | 南通明德重工有限公司 | Design method for subsection division of chemical carrier |
| CN103661802A (en) * | 2013-12-05 | 2014-03-26 | 江苏新时代造船有限公司 | Method for installing outfitting parts |
| CN109850066A (en) * | 2019-02-28 | 2019-06-07 | 广船国际有限公司 | A kind of ship always organizes method for loading |
| CN111422319A (en) * | 2020-04-17 | 2020-07-17 | 上海外高桥造船有限公司 | Multi-island construction method in large ship dock and application |
| CN111976917A (en) * | 2020-09-08 | 2020-11-24 | 上海外高桥造船海洋工程有限公司 | Outfitting method for ship superstructure |
| CN112373648A (en) * | 2020-11-23 | 2021-02-19 | 上海外高桥造船有限公司 | Method for constructing cruise ship |
| CN112550626A (en) * | 2020-12-07 | 2021-03-26 | 沪东中华造船(集团)有限公司 | Construction method of deep oil tank area of container ship |
| CN113581408A (en) * | 2021-08-11 | 2021-11-02 | 上海外高桥造船有限公司 | Ship block division method |
| CN113942620A (en) * | 2021-10-27 | 2022-01-18 | 沪东中华造船(集团)有限公司 | Ship position arrangement method for improving dock utilization rate |
-
2022
- 2022-06-29 CN CN202210784782.7A patent/CN114954832A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1931663A (en) * | 2006-09-30 | 2007-03-21 | 沪东中华造船(集团)有限公司 | District building and dock assembling method for small ship |
| CN102582784A (en) * | 2012-03-30 | 2012-07-18 | 南通明德重工有限公司 | Process for sectionally putting up ship berths or docks |
| CN103507913A (en) * | 2013-09-12 | 2014-01-15 | 南通明德重工有限公司 | Design method for subsection division of chemical carrier |
| CN103661802A (en) * | 2013-12-05 | 2014-03-26 | 江苏新时代造船有限公司 | Method for installing outfitting parts |
| CN109850066A (en) * | 2019-02-28 | 2019-06-07 | 广船国际有限公司 | A kind of ship always organizes method for loading |
| CN111422319A (en) * | 2020-04-17 | 2020-07-17 | 上海外高桥造船有限公司 | Multi-island construction method in large ship dock and application |
| CN111976917A (en) * | 2020-09-08 | 2020-11-24 | 上海外高桥造船海洋工程有限公司 | Outfitting method for ship superstructure |
| CN112373648A (en) * | 2020-11-23 | 2021-02-19 | 上海外高桥造船有限公司 | Method for constructing cruise ship |
| CN112550626A (en) * | 2020-12-07 | 2021-03-26 | 沪东中华造船(集团)有限公司 | Construction method of deep oil tank area of container ship |
| CN113581408A (en) * | 2021-08-11 | 2021-11-02 | 上海外高桥造船有限公司 | Ship block division method |
| CN113942620A (en) * | 2021-10-27 | 2022-01-18 | 沪东中华造船(集团)有限公司 | Ship position arrangement method for improving dock utilization rate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116890969A (en) * | 2023-07-31 | 2023-10-17 | 招商局重工（江苏）有限公司 | Efficient and safe floating production oil storage and discharge device, construction process thereof and precision control method |
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