CN113525622A - Method for mounting single-arm and double-arm shaft support of roll-on-roll-off ship - Google Patents
Method for mounting single-arm and double-arm shaft support of roll-on-roll-off ship Download PDFInfo
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- CN113525622A CN113525622A CN202110922825.9A CN202110922825A CN113525622A CN 113525622 A CN113525622 A CN 113525622A CN 202110922825 A CN202110922825 A CN 202110922825A CN 113525622 A CN113525622 A CN 113525622A
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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
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/20—Building or assembling prefabricated vessel modules or parts other than hull blocks, e.g. engine rooms, rudders, propellers, superstructures, berths, holds or tanks
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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
- B63B73/30—Moving or transporting modules or hull blocks to assembly sites, e.g. by rolling, lifting or floating
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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
- B63B73/40—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by joining methods
- B63B73/43—Welding, e.g. laser welding
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- Architecture (AREA)
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Transportation (AREA)
- Arc Welding In General (AREA)
Abstract
The invention provides a mounting method of a single-arm shaft support and a double-arm shaft support of a roll-on ship, which comprises the following steps: according to the requirements of a drawing, the single-arm support and the double-arm support are respectively butted and positioned on the jig frame, and welding is carried out after the positioning meets the technical requirements; the single arm frame and the double arm frame are pre-positioned on the ship section; after the single-double arm frame is positioned, the single-double arm frame is fixed by a clamping horse, round pipe supports are additionally arranged at the positions of the single-double arm frame and the double arm frame for reinforcement, and finally welding is carried out. According to the method for installing the single-double-arm shaft support of the roll-on-roll-off ship, the assembling stage of the single-double-arm support is changed from folding positioning to segmented preassembly, and through the technological innovation, the problems of rough pulling and leaning positioning of a calabash for folding are solved, overhead welding positioning and welding operation of workers are reduced, safety construction is greatly improved, the operation environment is improved, the hanging time in a dock is reduced, the work efficiency is improved, and a technical guarantee is provided for quasi-time undocking.
Description
Technical Field
The invention belongs to the technical field of ship manufacturing, and particularly relates to a method for mounting a single-arm shaft support and a double-arm shaft support of a roll-on ship.
Background
For a ship with a long shafting and an axle-hung type shaft engine, the requirement on alignment is high, and a higher requirement is also provided for the installation of a single-double arm frame through which the axis passes, the AG02 section comprises a V-shaped bracket and a single-arm frame (I-shaped), the steel casting structure with single double arms is all installed in a high-altitude pulling and positioning mode after the axis is determined during folding, the weight of the V-shaped bracket is about 29.6t, the weight of the single-arm frame (I-shaped) is about 6t, the single-double arm frame is heavy and is a steel casting, and therefore the assembly difficulty is high.
Disclosure of Invention
In order to solve the problems, the invention provides a mounting method of a single-arm shaft support and a double-arm shaft support of a roll-on ship, which changes the mounting stage of the single-arm and double-arm supports from folding positioning to subsection pre-mounting.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for installing single-arm shaft support and double-arm shaft support of a roll-on-roll-off ship is characterized by comprising the following steps:
s1, assembling a single-arm support and a double-arm support on a jig frame;
s2, preassembling and accurately positioning the single-arm support and the double-arm support on the ship section;
and S3, welding and connecting the single arm support and the double arm support with the ship section.
Further, step S1 is to put the jig frame templates in the assembly field according to the drawing requirements of the shafting layout, then respectively hang the segments of the single-arm frame and the double-arm frame to the respective jig frame templates, measure the relevant dimensions according to the jig frame drawing data, and weld when the center of the shaft hole of the single-arm frame and the center of the shaft hole of the double-arm frame are on the same axis and the accuracy is ± 2mm after the relevant dimensions reach the standards.
Further, the step S2 specifically includes the following steps:
s21, after the main body subsection electric welding is finished and the main body data are detected to be correct, the axis data of the head target stand and the tail target stand are retested to provide a basis for positioning the single-double arm support;
s22, sequentially hoisting the double-arm support and the single-arm support to the upper part of the subsection by using a crane, slowly lowering the double-arm support and the single-arm support to an appointed position for coarse positioning, positioning the double-arm support firstly, and then positioning the single-arm support;
s24, respectively welding two groups of positioning eye plates on the double-arm frame and ship sections on two sides of the double-arm frame, connecting the two groups of positioning eye plates by using a hoist, tensioning the hoist to achieve fine positioning of the double-arm frame, and performing fine positioning on the single-arm frame by adopting the same method;
s23, positioning measurement is carried out, the end face of a closure opening at the tail of the double-arm support is used as a reference for measurement, the distance between the double-arm support and the section of the closure opening from the end face of the tail to the stem of the section is ensured after the section is constructed, and the allowable error is 0 to +5 mm; the distance between the tail section of the double-arm support and the center of the bow section of the single-arm support is 10888mm, and the allowable error is +/-5 mm.
Further, in step S3, after the double-boom and the single-boom are positioned, the single-boom and the double-boom are fixed to the ship by segments by using a bridge, circular tube supports are additionally arranged at the positions of the single-boom and the double-boom to reinforce, and finally welding is performed.
Further, in the step S3, the welding sequence of each welding line is indicated before welding, the double-arm support is welded first, then the single-arm support is welded, during the welding process, two persons weld simultaneously, and the axle center change condition of the steel casting is detected at regular time according to the position of the steel wire.
For a large-scale ro-ro ship, the construction period is very short, and by adopting the installation method of the ro-ro ship single-double arm shaft bracket and double-arm bracket of the invention, the single-double arm bracket and double-arm bracket are installed in a segmented preassembling mode, thereby reducing the high-altitude operation risk and high-altitude positioning period in a dock, improving the high-altitude overhead welding operation environment, ensuring the smooth implementation of the plan of the ship and providing the technical guarantee for the smooth undocking of the ship; the segmentation precision is improved, the folding and unfolding are reduced, and the integral construction level and benefit are improved.
By the mode, the risk of high-altitude operation is reduced, the operation environment is improved, the folding period is improved to the maximum extent, the time of the dock occupation period is reduced, the average period of folding and positioning installation of the single-arm and double-arm racks on the left and right sides in the dock is 7 days, the positioning period of sectional assembly is 3 days, the total time is saved by 4 days, the dock cost is 2 ten thousand per day, the total time is saved by 8 thousands, and the time and the benefit are considerable when calculated according to 6 ships.
Drawings
Fig. 1 is a schematic view of the installation of the single-double boom on a ship section according to the present invention;
FIG. 2 is a schematic view of the support of the monoboom of the present invention after the vessel is positioned in sections;
fig. 3 is a schematic view of the support of the double-arm frame after the ship is positioned in a section.
Wherein, 1-single arm support, 2-double arm support, 3-ship segmentation, 4-clamping horse, 5-round pipe support and 6-fixed eye plate.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
As shown in fig. 1-3, a method for mounting a single-arm shaft support and a double-arm shaft support of a roll-on ship comprises the following steps:
s1, assembling a single-arm support 1 and a double-arm support 2 on a jig frame: according to drawing requirements and shafting arrangement drawing requirements, firstly, placing jig frame templates in an assembly site according to drawing sizes, then respectively hanging the sections of the single arm support 1 and the double arm support 2 onto respective jig frame templates, and welding when the center of the shaft hole of the single arm support 1 and the center of the shaft hole of the double arm support 2 are on the same axis and the precision is +/-2 mm after relevant dimensions are measured according to jig frame drawing data and reach standards;
s2, preassembling and positioning the single-arm support 1 and the double-arm support 2 on a ship section, and specifically comprising the following steps:
sequentially hoisting the double-arm frame 2 and the single-arm frame 1 above the ship section 3 by using a crane, slowly lowering the double-arm frame 2 and the single-arm frame 1 to a specified position for coarse positioning, positioning the double-arm frame 2, and then positioning the single-arm frame 1;
s24, respectively welding two groups of positioning eye plates 6 on the double-arm frame 2 and the ship sections 3 on the two sides of the double-arm frame, connecting the two groups of positioning eye plates 6 by using a hoist, tensioning the hoist to achieve the fine positioning of the double-arm frame 2, and performing the fine positioning on the single-arm frame 1 by adopting the same method;
s23, positioning measurement is carried out, the end face of a closure port at the tail of the double-arm frame 2 is taken as a reference for measurement, after the building of the section is finished, the distance between the double-arm frame 2 and the end face of the tail to the section of the closure port at the bow of the ship section 3 is ensured, and the allowable error is 0 to +5 mm; the distance between the tail section of the double-arm support 2 and the center of the bow section of the single-arm support 1 is 10888mm, and the allowable error is +/-5 mm;
and S3, welding and connecting the single-arm support 1 and the double-arm support 2 with the ship section 3, specifically, after the single-arm support 1 and the double-arm support 2 are positioned, fixing the single-arm support 1 and the double-arm support 2 by using a clamping horse 4, additionally arranging a circular tube support 5 at the positions of the single-arm support 1 and the double-arm support 2 for reinforcement, finally welding, marking the welding sequence of each welding line before welding, firstly welding the double-arm support 2, then welding the single-arm support 1, simultaneously welding by two persons in the welding process, and detecting the axle center change condition of the steel casting at regular time through the position of a steel wire.
The above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention should be regarded as the scope of the present invention to those skilled in the art.
Claims (5)
1. A method for installing single-arm shaft support and double-arm shaft support of a roll-on-roll-off ship is characterized by comprising the following steps:
s1, assembling a single-arm support and a double-arm support on a jig frame;
s2, preassembling and accurately positioning the single-arm support and the double-arm support on the ship section;
and S3, welding and connecting the single arm support and the double arm support with the ship section.
2. The method for positioning and installing the single-double-arm shaft support of the roll-on-roll-off ship according to claim 1, wherein the step S1 is specifically that according to the requirement of shafting layout drawing, a jig frame template is put well according to the drawing size in an assembly site, then the segments of the single-arm support and the double-arm support are respectively hung on the respective jig frame templates, after the relevant size is measured according to jig frame drawing data and reaches the standard, when the center of the shaft hole of the single-arm support and the center of the shaft hole of the double-arm support are on the same axis and the accuracy is +/-2 mm, welding is carried out.
3. The method of claim 1, wherein the step S2 comprises the steps of:
s21, after the main body subsection electric welding is finished and the main body data are detected to be correct, the axis data of the head target stand and the tail target stand are retested to provide a basis for positioning the single-double arm support;
s22, sequentially hoisting the double-arm support and the single-arm support to the upper part of the subsection by using a crane, slowly lowering the double-arm support and the single-arm support to an appointed position for coarse positioning, positioning the double-arm support firstly, and then positioning the single-arm support;
s24, respectively welding two groups of positioning eye plates on the double-arm frame and ship sections on two sides of the double-arm frame, connecting the two groups of positioning eye plates by using a hoist, tensioning the hoist to achieve fine positioning of the double-arm frame, and performing fine positioning on the single-arm frame by adopting the same method;
s23, positioning measurement is carried out, the end face of a closure opening at the tail of the double-arm support is used as a reference for measurement, the distance between the double-arm support and the section of the closure opening from the end face of the tail to the stem of the section is ensured after the section is constructed, and the allowable error is 0 to +5 mm; the distance between the tail section of the double-arm support and the center of the bow section of the single-arm support is 10888mm, and the allowable error is +/-5 mm.
4. The method for positioning and installing the single-double-arm shaft support of the roll-on-roll-off ship according to claim 1, wherein the step S3 is to fix the double-arm support and the single-arm support with the ship in sections by using a karma after the double-arm support and the single-arm support are positioned, additionally arrange a circular tube support at the positions of the single-arm support and the double-arm support for reinforcement, and finally perform welding.
5. The method for installing a single-arm and double-arm shaft support of a roll-on ship as claimed in claim 4, wherein in the step S3, before welding, the welding sequence of each welding seam is indicated, the double-arm support is welded first, then the single-arm support is welded, during welding, double persons weld simultaneously, and the change of the axis of the steel casting is detected at regular time according to the position of the steel wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110922825.9A CN113525622A (en) | 2021-08-12 | 2021-08-12 | Method for mounting single-arm and double-arm shaft support of roll-on-roll-off ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110922825.9A CN113525622A (en) | 2021-08-12 | 2021-08-12 | Method for mounting single-arm and double-arm shaft support of roll-on-roll-off ship |
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| Publication Number | Publication Date |
|---|---|
| CN113525622A true CN113525622A (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110922825.9A Pending CN113525622A (en) | 2021-08-12 | 2021-08-12 | Method for mounting single-arm and double-arm shaft support of roll-on-roll-off ship |
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Citations (10)
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|---|---|---|---|---|
| JPH06312685A (en) * | 1993-04-30 | 1994-11-08 | I H I Amutetsuku:Kk | Shaft drawing engineering method for repaired ship and shaft supporting frame device |
| JPH09277979A (en) * | 1996-04-17 | 1997-10-28 | Jiyun Itani | Around stern device of ship |
| CN101264790A (en) * | 2007-12-28 | 2008-09-17 | 广州文冲船厂有限责任公司 | Method for mounting stern herringbone bracket |
| CN101306717A (en) * | 2008-05-21 | 2008-11-19 | 沪东中华造船(集团)有限公司 | Optical alignment method for shipbuilding central axis |
| CN102407921A (en) * | 2011-09-01 | 2012-04-11 | 广州中船黄埔造船有限公司 | Mounting method for sectional inversely hung rudder arm |
| CN103072667A (en) * | 2011-10-25 | 2013-05-01 | 上海船厂船舶有限公司 | Method for locating tail pipe supporting seat in subsection |
| CN104816783A (en) * | 2015-04-30 | 2015-08-05 | 中国船舶重工集团公司第七○二研究所 | Bracket locating method based on multi-screw ship double-arm bracket model vacuolus optimization technology |
| CN106428415A (en) * | 2016-09-20 | 2017-02-22 | 中交航局第三工程有限公司 | Stern shaft tube mounting technology using hole-boring-free method |
| CN107323608A (en) * | 2017-06-28 | 2017-11-07 | 广船国际有限公司 | A kind of propeller shaft bracket installation method |
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-
2021
- 2021-08-12 CN CN202110922825.9A patent/CN113525622A/en active Pending
Patent Citations (10)
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| JPH06312685A (en) * | 1993-04-30 | 1994-11-08 | I H I Amutetsuku:Kk | Shaft drawing engineering method for repaired ship and shaft supporting frame device |
| JPH09277979A (en) * | 1996-04-17 | 1997-10-28 | Jiyun Itani | Around stern device of ship |
| CN101264790A (en) * | 2007-12-28 | 2008-09-17 | 广州文冲船厂有限责任公司 | Method for mounting stern herringbone bracket |
| CN101306717A (en) * | 2008-05-21 | 2008-11-19 | 沪东中华造船(集团)有限公司 | Optical alignment method for shipbuilding central axis |
| CN102407921A (en) * | 2011-09-01 | 2012-04-11 | 广州中船黄埔造船有限公司 | Mounting method for sectional inversely hung rudder arm |
| CN103072667A (en) * | 2011-10-25 | 2013-05-01 | 上海船厂船舶有限公司 | Method for locating tail pipe supporting seat in subsection |
| CN104816783A (en) * | 2015-04-30 | 2015-08-05 | 中国船舶重工集团公司第七○二研究所 | Bracket locating method based on multi-screw ship double-arm bracket model vacuolus optimization technology |
| CN106428415A (en) * | 2016-09-20 | 2017-02-22 | 中交航局第三工程有限公司 | Stern shaft tube mounting technology using hole-boring-free method |
| CN107323608A (en) * | 2017-06-28 | 2017-11-07 | 广船国际有限公司 | A kind of propeller shaft bracket installation method |
| CN112389618A (en) * | 2020-12-20 | 2021-02-23 | 江龙船艇科技股份有限公司 | Marine tail shaft fixing device and mounting process thereof |
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Application publication date: 20211022 |
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