CN114987715B - Manufacturing method of midspan double-shell section and midspan double-shell section - Google Patents
Manufacturing method of midspan double-shell section and midspan double-shell section Download PDFInfo
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- CN114987715B CN114987715B CN202210769142.9A CN202210769142A CN114987715B CN 114987715 B CN114987715 B CN 114987715B CN 202210769142 A CN202210769142 A CN 202210769142A CN 114987715 B CN114987715 B CN 114987715B
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- bulb steel
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- shaped hole
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 77
- 239000010959 steel Substances 0.000 claims abstract description 77
- 238000003466 welding Methods 0.000 claims abstract description 40
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000009434 installation Methods 0.000 claims description 8
- 238000010276 construction Methods 0.000 abstract description 10
- 238000003780 insertion Methods 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract description 2
- 230000007306 turnover Effects 0.000 abstract description 2
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B3/00—Hulls characterised by their structure or component parts
- B63B3/14—Hull parts
- B63B3/16—Shells
- B63B3/20—Shells of double type
-
- 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
- B63B73/50—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by forming methods, e.g. manufacturing of curved blocks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to a manufacturing method of a midspan double-shell section and the midspan double-shell section, which comprises an inner shell and an outer shell, wherein during construction: step 1, determining the welding condition of a longitudinal rib on an inner shell and a rib plate on an outer shell according to a ship building drawing, and if the longitudinal rib is flat-bulb steel, correspondingly arranging R-shaped holes on the rib plate, wherein one side of the flat-bulb steel and the R-shaped holes need to be welded; step 2, adding a negative tolerance to the R-shaped hole in the direction of the welding side of the flat-bulb steel and the R-shaped hole; step 3, constructing and assembling an outer plate of the shell as a base surface, and installing all stringers and rib plates on the outer plate; constructing a large group of base surfaces by taking an inner bottom plate of the inner shell as the base surface, and installing all longitudinal bones on the inner bottom plate; and 4, turning over the middle assembly for 180 degrees, then buckling and carrying on a large group of base surfaces, and welding. The method can hoist in place once in a large group, reduces the insertion work of secondary hoisting or longitudinal bone bulk hoisting, effectively shortens the period of the jig frame and improves the turnover rate of the jig frame.
Description
Technical Field
The invention relates to the field of ship construction, in particular to a manufacturing method of a midspan double-shell section and the midspan double-shell section.
Background
In modern ship manufacture, the bottom of a general ship is provided with a bilaterally symmetrical double-bottom structure, and besides large-opening ships such as bulk carriers, container ships and heavy-lift ships, LNG ships, oil ships and even main decks of cargo hold roofs are also provided with bilaterally symmetrical double-shell structures.
The two layers of such structures are commonly referred to as an inner shell and an outer shell, and the profiles on the inner and outer shells are also typically symmetrically arranged, which results in the fact that the through holes of the profiles on the inner and outer shells are welded with the profiles almost without gaps, and the entire outer shell (or inner shell) cannot be manufactured by reversely buckling on the bed-jig base surface of the inner shell (or outer shell) after all the ribs and stringers are installed, which results in the disadvantages of improving the manufacturing efficiency and shortening the bed-jig period.
At present, two construction modes are commonly adopted for the segmentation of the double-layer structure:
(1) The outer shell, the rib plates and the stringers are assembled as a middle before the large group, and the longitudinal bones welded with the rib plates on one side of the inner shell plate are attached to the rib plates in advance (or the rib plates are inserted into the holes of the rib plates in bulk after the large group) and then reversely fastened.
(2) The shell is divided into two middle assemblies at the middle longitudinal part, the middle assemblies which do not extend out of the middle longitudinal part of the shell plate are reversely buckled on the inner shell plate, and then the middle assemblies which extend out of the middle longitudinal part of the shell plate are reversely buckled on the inner shell plate.
For the first method, part of the longitudinal bones are required to be installed after the outer shell and the inner shell are buckled; for the second method, the outer shell needs to be divided into two parts, and the two parts are respectively buckled on the inner shell; whether the first method or the second method can not realize the completion of the installation of the outer shell and the inner shell by one-time buckling, and the problems of large workload and long period of the jig frame exist.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a manufacturing method of a midspan double-shell section and the midspan double-shell section, which expand middle-group components as much as possible, mount and position a single deck or a platform component at one time, reduce the time period of secondary lifting, reduce the butt welding seam of the relevant rib plate section seam, effectively shorten the manufacturing period and the jig frame period of the large-group section, and improve the working efficiency of the large-group section.
The technical purpose of the invention is realized by the following technical scheme:
a method of manufacturing a midspan double shell section, the method comprising the steps of:
step 1, determining the welding condition of a longitudinal rib on an inner shell and a rib plate on an outer shell according to a ship building drawing, and if the longitudinal rib is flat-bulb steel, correspondingly arranging R-shaped holes on the rib plate, wherein one side of the flat-bulb steel and the R-shaped holes need to be welded;
Step 2, adding a negative tolerance to the R-shaped hole in the direction of the welding side of the flat-bulb steel and the R-shaped hole;
Step 3, constructing and assembling an outer plate of the shell as a base surface, and installing all stringers and rib plates on the outer plate; constructing a large group of base surfaces by taking an inner bottom plate of the inner shell as the base surface, and installing all longitudinal bones on the inner bottom plate;
and 4, turning the middle assembly for 180 degrees, then buckling and carrying on a large group of base surfaces, and carrying out welding operation.
Further, when the longitudinal bones on the inner bottom plate are installed, the installation position of the flat-bulb steel on the inner bottom plate is shifted towards the opposite direction of welding of the flat-bulb steel and the R-shaped holes, and the gap of the welding position between the flat-bulb steel and the R-shaped holes is increased.
Further, when the longitudinal bones on the inner bottom plate are installed, the flat-bulb steel is inclined towards the ball head direction relative to the vertical direction.
Further, when the longitudinal bones on the inner bottom plate are installed, the installation position of the flat-bulb steel on the inner bottom plate is shifted towards the opposite direction of welding of the flat-bulb steel and the R-shaped hole, and the gap of the welding position between the flat-bulb steel and the R-shaped hole is increased; and the flat-bulb steel is inclined towards the ball head direction relative to the vertical direction.
Further, in step 2, a negative tolerance of 1mm is added to the R-shaped hole in the direction of the welding side of the flat bulb steel and the R-shaped hole.
Further, the installation position of the flat-bulb steel on the inner bottom plate is offset by 1mm towards the opposite direction of welding of the flat-bulb steel and the R-shaped hole.
Further, the flat-bulb steel is inclined towards the ball head direction relative to the vertical direction, so that the deviation position of the ball head of the flat-bulb steel relative to the vertical direction is not more than 2mm.
Further, in step 4, the rib plate and the stringer are welded to the inner bottom plate, respectively, and the flat-bulb steel is welded to the R-shaped hole.
The invention also provides a midspan double-shell section, which comprises an outer shell and an inner shell, and is built by folding according to the following method:
step 1, determining the welding condition of a longitudinal rib on an inner shell and a rib plate on an outer shell according to a ship building drawing, and if the longitudinal rib is flat-bulb steel, correspondingly arranging R-shaped holes on the rib plate, wherein one side of the flat-bulb steel and the R-shaped holes need to be welded;
Step 2, adding a negative tolerance to the R-shaped hole in the direction of the welding side of the flat-bulb steel and the R-shaped hole;
Step 3, constructing and assembling an outer plate of the shell as a base surface, and installing all stringers and rib plates on the outer plate; constructing a large group of base surfaces by taking an inner bottom plate of the inner shell as the base surface, and installing all longitudinal bones on the inner bottom plate;
and 4, turning the middle assembly for 180 degrees, then buckling and carrying on a large group of base surfaces, and carrying out welding operation.
Further, when the longitudinal frame is installed, the installation position of the flat-bulb steel on the inner shell is shifted towards the opposite direction of welding of the flat-bulb steel and the R-shaped hole, and the gap of the welding position between the flat-bulb steel and the R-shaped hole is increased.
Further, when the longitudinal frame is installed, the flat-bulb steel is inclined towards the ball head direction relative to the vertical direction.
Preferably, when the longitudinal bone is installed, the installation position of the flat-bulb steel on the inner shell is shifted towards the opposite direction of welding of the flat-bulb steel and the R-shaped hole, and the gap of the welding position between the flat-bulb steel and the R-shaped hole is increased; and the flat-bulb steel is inclined towards the ball head direction relative to the vertical direction.
Compared with the prior art, the invention has the beneficial effects that:
1. The rib plates and rib plates or rib plates and stringers are welded in the middle group, so that the welding work of the positions in the process of segmenting the large group is avoided.
2. The hoisting device can be hoisted in place once in a large group, so that the insertion work of secondary hoisting or bulk hoisting of longitudinal bones is reduced.
3. Effectively shortens the period of the jig frame and improves the turnover rate of the jig frame: only the welding work of the rib plates, the stringers, the inner shell and the rib plates and the longitudinal bones is left, so that the period of a large group of jig frames can be effectively shortened.
Drawings
Fig. 1 is a schematic diagram of a conventional midspan double hull section construction method in this embodiment.
Fig. 2 is a schematic diagram of a conventional midspan double hull section construction method in this embodiment.
Fig. 3 is a schematic view of the structure of the housing in the present invention.
Fig. 4 is a schematic illustration of the outer shell and inner shell snap fit according to a design drawing.
Fig. 5 is a schematic view of the holes of the flat bulb steel and the R-shaped holes after the method of the present invention is adopted.
Fig. 6 is a schematic view of the fastening operation of the outer shell and the inner shell in the present invention.
In the figure, 1, a shell; 2. an inner case; 3. an R-shaped hole; 4. flat bulb steel; 5. an outer plate; 6. rib plates; 7. stringers; 8. t-shaped materials; 9. welding positions of the flat-bulb steel and the R-shaped holes; 10. an inner bottom plate; 11. a through hole; 12. the original installation position of the flat bulb steel; 13. a vertical direction; 14. ball head.
Detailed Description
The technical scheme of the invention is further described below with reference to the specific embodiments:
The midspan double-shell section comprises an inner shell and an outer shell, the sections on the inner shell and the outer shell are generally symmetrically arranged, so that through holes of the sections on the inner shell and the outer shell are welded with the sections almost without gaps, flat-bulb steel longitudinal ribs on the inner shell are required to be welded with R-shaped holes on the outer shell, the outer shell cannot be directly buckled with the inner shell due to the influence of construction precision, a large amount of trimming work is required to be carried out at the R-shaped holes, and therefore, the following two modes are generally adopted for construction:
First, when the outer shell 1, the rib plates and the stringers are assembled as a middle, the flat-bulb steel (longitudinal ribs) on one side of the center line on the inner shell is temporarily not installed, the flat-bulb steel 4 on the other side is installed, and after the outer shell 1 and the inner shell 2 are buckled, the flat-bulb steel on one side of the center line is installed, as shown in fig. 1.
Secondly, the outer shell 1 is divided into two middle groups at the position close to the middle stringer, and flat-bulb steels 4 on two sides of the central line on the inner shell 2 are symmetrically arranged; the outer shell 1 is first reversely fastened to the inner shell 2 without extending through the middle longitudinal center, and then the outer shell 1 is reversely fastened to the inner shell with extending through the middle longitudinal center, as shown in fig. 2.
The two modes can not directly fasten the outer shell and the inner shell at one time during construction, the construction process is complicated, the jig frame period is longer, and a large group of workload is larger.
Step 1, determining the welding condition of a longitudinal rib on an inner shell and a rib plate on an outer shell according to a ship building drawing, and if the longitudinal rib is flat-bulb steel, correspondingly arranging an R-shaped hole on the rib plate, wherein one side of the flat-bulb steel and the R-shaped hole need to be welded, and the welding position 9 of the flat-bulb steel 4 and the R-shaped hole 3 is shown in fig. 4; if the longitudinal rib is a T-profile 8, the T-profile 8 and the corresponding through-hole 11 in the rib plate 6 do not need to be welded, as shown in fig. 4.
Step 2, because of the structural specificity of the flat-bulb steel and the R-shaped holes, the R-shaped holes on the rib plates of the outer shell cannot be directly buckled with the flat-bulb steel on the inner shell from the upper side due to slight deviation of precision; thus, a negative tolerance of 1mm is applied to the R-shaped hole in the direction of the welding side of the flat bulb steel and the R-shaped hole (the operation on both sides of the segment center line is the same, and the present embodiment only illustrates the operation on one side of the center line), as shown in FIG. 5;
Step 3, assembling in construction by taking an outer plate 5 of the shell 1 as a base surface, and installing all stringers 7 and rib plates 6, as shown in fig. 3; constructing a large group of base surfaces by taking an inner bottom plate 10 of the inner shell 2 as the base surface, and installing all longitudinal bones on the inner bottom plate; the longitudinal frame comprises a T-shaped material 8 and flat bulb steel 4.
And 4, turning the middle assembly for 180 degrees, then buckling and carrying the assembly on a large group of base surfaces, and welding the rib plates 6 and the stringers 7 with the inner bottom plate 10 and the flat bulb steel 4 with the R-shaped holes 3 during welding, as shown in fig. 6.
Preferably, when the longitudinal bones on the inner bottom plate are mounted, the mounting position of the flat-bulb steel 4 on the inner bottom plate 10 is offset by 1mm relative to the original mounting position 12 of the flat-bulb steel in the opposite direction of the welding of the flat-bulb steel and the R-shaped hole, the gap between the welding positions of the flat-bulb steel and the R-shaped hole is increased, the flat-bulb steel on the port is moved by 1mm leftwards, and the flat-bulb steel on the starboard is moved by 1mm rightwards, so that the gap between the welding positions of the flat-bulb steel and the R-shaped hole is increased, as shown in fig. 5.
Preferably, when the longitudinal bone on the inner bottom plate is mounted, the flat-bulb steel is inclined towards the ball head direction relative to the vertical direction, the flat-bulb steel 4 is originally vertically mounted on the inner bottom plate 10, the upper end of the flat-bulb steel 4 is inclined towards one side of the ball head 14, the root position of the flat-bulb steel is kept unchanged, and the allowable range of inclination is that the deviation position of the ball head 14 of the flat-bulb steel relative to the vertical direction 13 is not more than 2mm, as shown in fig. 5.
As the preferable scheme, the negative tolerance, the mounting position deviation and the inclination of the mounting angle of the profile have certain tolerance requirements, if only one measure is taken, the effect is possibly not ideal, so the preferable scheme is that the three measures of the deviation of the mounting position of the flat-bulb steel on the inner bottom plate towards the opposite direction of welding the flat-bulb steel and the R-shaped hole and the inclination of the flat-bulb steel towards the direction of the ball head relative to the vertical direction are implemented, and the negative tolerance of 1mm is added to the R-shaped hole in the direction of combining the flat-bulb steel and the welding side of the R-shaped hole, as shown in fig. 5.
The present embodiment is further illustrative of the present invention and is not to be construed as limiting the invention, and those skilled in the art can make no inventive modifications to the present embodiment as required after reading the present specification, but only as long as they are within the scope of the claims of the present invention.
Claims (6)
1. A method of manufacturing a midspan double shell section, the method comprising the steps of:
step 1, determining the welding condition of a longitudinal rib on an inner shell and a rib plate on an outer shell according to a ship building drawing, and if the longitudinal rib is flat-bulb steel, correspondingly arranging R-shaped holes on the rib plate, wherein one side of the flat-bulb steel and the R-shaped holes need to be welded;
Step 2, adding a negative tolerance to the R-shaped hole in the direction of the welding side of the flat-bulb steel and the R-shaped hole;
Step 3, constructing and assembling an outer plate of the shell as a base surface, and installing all stringers and rib plates on the outer plate; constructing a large group of base surfaces by taking an inner bottom plate of the inner shell as the base surface, and installing all longitudinal bones on the inner bottom plate; when the longitudinal bones on the inner bottom plate are installed, the installation position of the flat-bulb steel on the inner bottom plate is deviated towards the opposite direction of welding of the flat-bulb steel and the R-shaped hole, and the gap of the welding position between the flat-bulb steel and the R-shaped hole is increased; the flat-bulb steel is inclined towards the ball head direction relative to the vertical direction;
and 4, turning the middle assembly for 180 degrees, then buckling and carrying on a large group of base surfaces, and carrying out welding operation.
2. A method of manufacturing a mid-span double shell section according to claim 1, characterized in that in step 2, a negative tolerance of 1mm is applied to the R-shaped hole in the direction of the welding side of the flat bulb steel to the R-shaped hole.
3. A method of manufacturing a midspan double hull section according to claim 1 characterised in that the mounting location of the flat-bulb steel on the inner bottom plate is offset by 1mm in the opposite direction to the welding of the flat-bulb steel with the R-shaped hole.
4. A method of manufacturing a midspan double hull section according to claim 1 characterised in that the flat bulb steel is inclined in relation to the vertical in the direction of the bulb so that the bulb of the flat bulb steel is not deviated more than 2mm in relation to the vertical.
5. The method according to claim 1, wherein in the step 4, the rib plate and the stringer are welded to the inner bottom plate and the flat bulb steel is welded to the R-shaped hole.
6. A midspan double shell section comprising an outer shell and an inner shell, which are built closed according to the method of manufacturing a midspan double shell section according to any of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210769142.9A CN114987715B (en) | 2022-07-01 | 2022-07-01 | Manufacturing method of midspan double-shell section and midspan double-shell section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210769142.9A CN114987715B (en) | 2022-07-01 | 2022-07-01 | Manufacturing method of midspan double-shell section and midspan double-shell section |
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| Publication Number | Publication Date |
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| CN114987715A CN114987715A (en) | 2022-09-02 |
| CN114987715B true CN114987715B (en) | 2024-06-11 |
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| CN202210769142.9A Active CN114987715B (en) | 2022-07-01 | 2022-07-01 | Manufacturing method of midspan double-shell section and midspan double-shell section |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115535180B (en) * | 2022-10-14 | 2024-06-11 | 沪东中华造船(集团)有限公司 | Longitudinal bone positioning and mounting method for curved surface segmented outer plate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04254281A (en) * | 1991-02-05 | 1992-09-09 | Ishikawajima Harima Heavy Ind Co Ltd | Method for constructing double hull block |
| JPH07117785A (en) * | 1993-10-28 | 1995-05-09 | Mitsubishi Heavy Ind Ltd | Double-hull tanker |
| CN101204988A (en) * | 2006-12-20 | 2008-06-25 | 上海外高桥造船有限公司 | Rib board pulling method |
| CN101372258A (en) * | 2008-09-27 | 2009-02-25 | 上海江南长兴造船有限责任公司 | Method for drawing costal scute in shipbuilding |
| CN212530006U (en) * | 2020-07-10 | 2021-02-12 | 江苏扬子鑫福造船有限公司 | Novel superstructure longitudinal rib through hole floor, longitudinal rib assemblage structure |
| CN113277031A (en) * | 2021-06-15 | 2021-08-20 | 江南造船(集团)有限责任公司 | Rapid building method for lower water tank section of ship |
-
2022
- 2022-07-01 CN CN202210769142.9A patent/CN114987715B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04254281A (en) * | 1991-02-05 | 1992-09-09 | Ishikawajima Harima Heavy Ind Co Ltd | Method for constructing double hull block |
| JPH07117785A (en) * | 1993-10-28 | 1995-05-09 | Mitsubishi Heavy Ind Ltd | Double-hull tanker |
| CN101204988A (en) * | 2006-12-20 | 2008-06-25 | 上海外高桥造船有限公司 | Rib board pulling method |
| CN101372258A (en) * | 2008-09-27 | 2009-02-25 | 上海江南长兴造船有限责任公司 | Method for drawing costal scute in shipbuilding |
| CN212530006U (en) * | 2020-07-10 | 2021-02-12 | 江苏扬子鑫福造船有限公司 | Novel superstructure longitudinal rib through hole floor, longitudinal rib assemblage structure |
| CN113277031A (en) * | 2021-06-15 | 2021-08-20 | 江南造船(集团)有限责任公司 | Rapid building method for lower water tank section of ship |
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| CN114987715A (en) | 2022-09-02 |
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