CN115837966A - LNG ship transverse bulkhead block section carrying control method and LNG ship - Google Patents
LNG ship transverse bulkhead block section carrying control method and LNG ship Download PDFInfo
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- CN115837966A CN115837966A CN202211510838.6A CN202211510838A CN115837966A CN 115837966 A CN115837966 A CN 115837966A CN 202211510838 A CN202211510838 A CN 202211510838A CN 115837966 A CN115837966 A CN 115837966A
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- cofferdam
- bulkhead
- positioning
- block
- carrying
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 210000001503 joint Anatomy 0.000 claims abstract description 27
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 239000010720 hydraulic oil Substances 0.000 claims description 5
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 238000003032 molecular docking Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention relates to a method for controlling the carrying of a cofferdam total section of an LNG ship and the LNG ship, wherein the method comprises the following steps: step 1, a central line and a height datum line which are perpendicular to each other are arranged on a carrying and positioning surface of a transverse bulkhead block, and a reflector plate is pasted; step 2, surveying a hull central line, a height positioning datum point and a bulkhead hard gear butt joint line on the bulkhead carrying butt joint section; step 3, respectively arranging a columnar positioning backer at the port and starboard positions of the compartment hard gear lines on the compartment carrying butt joint sections; step 4, hoisting the transverse bulkhead block to the carrying butt joint subsection for carrying and positioning by means of guiding and positioning of a positioning backer; adjusting the position of the cofferdam total section; and 5, after the step 4 is finished, monitoring the perpendicularity of the transverse bulkhead total section to serve as an adjusting basis for subsequent device welding. The invention can realize the high-precision butt joint of the hard baffles of the compartment, realize the segmented quick hoisting, provide visual data monitoring for the subsequent verticality change and adjust the assembly welding sequence in time.
Description
Technical Field
The invention relates to the field of ship construction precision control, in particular to an LNG ship transverse bulkhead block total section carrying control method and an LNG ship.
Background
LNG ship transverse bulkhead total section is wide in the broad direction, and the width can reach 32106mm, and the direction of height is higher, highly can reach 23060mm, carries on the stage for half embedded carrying, and it is big to put up the positioning in-process hard shelves butt joint degree of difficulty, and transverse bulkhead total section is carrying the in-process verticality and easily changing, emptys easily even, and positioning adjustment is consuming time longer carrying the positioning in-process, still has the potential safety hazard in addition.
Disclosure of Invention
In order to solve the technical problems, the invention provides a transverse bulkhead block total section carrying control method of an LNG ship and the LNG ship.
The technical purpose of the invention is realized by the following technical scheme:
a method for controlling loading of a cofferdam overall section of an LNG ship is used for loading and positioning the overall section of the cofferdam on a cofferdam loading butt-joint section, and comprises the following steps:
step 1, before the transverse bulkhead block is loaded and hoisted, a central line and a height datum line which are perpendicular to each other are arranged on a loading positioning surface of the transverse bulkhead block, and reflecting sheets are respectively pasted at the two end positions of the central line and the two end positions of the height datum line;
step 2, surveying a hull central line, a height positioning datum point and a bulkhead hard gear butt joint line on the bulkhead carrying butt joint section;
step 4, hoisting the transverse bulkhead block section to the carrying butt joint section for carrying and positioning by means of guiding of a positioning backer; the lower opening of the transverse bulkhead total section is jointed with the bulkhead hard stop; adjusting the accuracy of the involution of the lower opening of the transverse bulkhead total section and the bulkhead hard stop by the bulkhead hard stop involution pair; measuring and positioning the center line of the hull, the height positioning datum point and the reflector plate by using a total station to adjust the position of the cofferdam total section;
and 5, after the step 4 is completed, monitoring the verticality between the upper opening of the cofferdam total section and the lower opening of the cofferdam total section, and taking the verticality as an adjustment basis for welding of a subsequent device.
Furthermore, the method also comprises the steps that two angle steels vertical to the bulkhead surface are respectively arranged at the strong structure positions of the left and right sides of the upper opening of the carrying positioning surface of the cofferdam total section, and lead wire ropes for plumb installation are installed on the angle steels; and a steel wire rope for adjusting the verticality after the transverse bulkhead block is carried and fixing the upper opening of the bulkhead is respectively arranged at the upper opening port-and-starboard strong structure position of the head end face of the bulkhead and the upper opening port-and-starboard strong structure position of the tail end face of the bulkhead.
Further, before step 4 is completed, the plumb bob on the lead wire rope is not installed temporarily, after step 4 is completed, the steel wire rope is connected with the plumb bob, and the verticality between the upper opening of the cofferdam and the lower opening of the cofferdam is monitored through the plumb bob.
Further, the angular dimensions of the centerline and height reference line are controlled to within 2 mm.
Further, the position of the height datum line is determined by taking the center line as a reference and moving the upper opening of the cofferdam downwards by 100mm along the center line.
Further, in step 4, after the transverse bulkhead block is mounted and hoisted in place, a jacking device is respectively arranged at the left, middle and right positions of the lower opening of the bulkhead, the jacking device is arranged on the side surface of the transverse bulkhead block, and the mounting position of the transverse bulkhead block is adjusted by the jacking device.
Further, in step 4, the position deviation of the central line is controlled within 2mm, the height deviation of the height reference point is controlled within 3mm, and the verticality between the upper opening and the lower opening of the compartment is controlled within 5 mm.
Further, in step 3, the positioning backer is installed on the hard gear line, and the involution verticality of the positioning backer and the hard gear line is controlled within 1 mm.
Furthermore, the position of the lead wire rope arranged on the angle steel is 50-100mm away from the bulkhead surface, after the perpendicularity between the upper opening and the lower opening of the bulkhead is adjusted, the perpendicularity between the upper opening and the lower opening of the bulkhead is monitored through a plumb bob, and the adjustment operation is carried out when the change of the perpendicularity exceeds a set range.
The invention also provides an LNG ship which comprises a transverse bulkhead total section and a bulkhead carrying butt-joint section, wherein the transverse bulkhead total section and the bulkhead carrying butt-joint section are carried on the bulkhead carrying butt-joint section according to the method.
Compared with the prior art, the method has the advantages that high-precision butt joint of hard bulkheads can be realized, the requirement of positioning precision is met by central positioning and vertical positioning of the upper opening, segmented rapid hoisting is realized, visual data monitoring is provided for subsequent verticality change, and the assembling and welding sequence needs to be adjusted in time when the verticality data deviation is found, so that high-efficiency and high-precision butt joint positioning of the total transom bulkhead segment is ensured.
Drawings
Fig. 1 is a schematic view of a cofferdam total section of the present invention mounted on a cofferdam mounted docking section.
In the figure, 1, a transverse bulkhead total section; 2. carrying, butting and segmenting; 3. a centerline; 4. a height reference line; 5. a reflective sheet; 6. a reflective sheet; 7. a lead wire rope; 8. a wire rope; 9. a hull centerline; 10. a height positioning reference point; 11. the bulkhead hard gear is butted with the butt joint line; 12. positioning a backer; 13. a hydraulic oil pump.
Detailed Description
The technical solution of the present invention is further described below with reference to specific embodiments:
an LNG ship cofferdam block embarkation control method and an LNG ship are disclosed, as shown in figure 1, by which a cofferdam block 1 is embarked and positioned on a bulkhead embarkation butt joint block 2, the method comprises the following steps:
step 1, before the transverse bulkhead block 1 is mounted and hoisted, a central line 3 and a height reference line 4 which are perpendicular to each other are arranged on a mounting positioning surface of the transverse bulkhead block 1, the central line 3 is taken as a reference, an upper opening of the transverse bulkhead moves downwards by 100mm along the central line 3 to determine the position of the height reference line 4, the angular dimensions of the central line 3 and the height reference line 4 are controlled within 2mm, a reflector plate 5 is respectively pasted at the upper position and the lower position of the central line 3, a reflector plate 6 is respectively pasted at the port and starboard strong structure position of the height reference line 4, and the four reflector plates are taken as positioning reference points for subsequent mounting of the transverse bulkhead block.
Step 2, surveying a hull central line 9, a height positioning datum point 10 and a bulkhead hard gear butt joint line 11 on the bulkhead carrying butt joint section;
And 4, hoisting the transverse bulkhead block section to the carrying butt joint section for carrying and positioning by means of the positioning backer 12.
Before the transverse bulkhead block is carried and hoisted, a steel wire rope 8 for adjusting the perpendicularity of the transverse bulkhead block after carrying and fixing the upper opening of the bulkhead is respectively arranged at the upper opening port-and-starboard strong structure position of the head end face of the bulkhead and the upper opening port-and-starboard strong structure position of the tail end face of the bulkhead, the steel wire rope 8 plays a role in fixing the transverse bulkhead block against toppling on one hand, and in addition, the perpendicularity of the transverse bulkhead block can be adjusted by drawing the steel wire rope 8 in the process of adjusting the perpendicularity.
After the cofferdam total section is carried and hoisted in place, a jacking device is respectively arranged at the left position, the middle position and the right position of the lower opening of the cofferdam, the jacking device is arranged at the side surface of the cofferdam total section, and the jacking device such as a hydraulic oil pump 13 adjusts the front position, the back position, the left position and the right position of the cofferdam total section through the hydraulic oil pump 13; adjusting the butt joint position of the lower opening of the transverse bulkhead block section and the hard gear by using a hydraulic oil pump, and detecting a butt joint line by using the surveyed hard gear, wherein the butt joint deviation is controlled within 3 mm;
the total station is utilized to measure and position the hull central line 9, the height positioning reference point 10, the reflector plate 5 and the reflector plate 6 so as to adjust the position of the total section of the cofferdam, the position deviation of the central line 3 and the hull central line 9 is controlled within 2mm, the height deviation of the height reference point 10 and the height reference line 4 is controlled within 3mm, and the verticality between the upper opening of the cofferdam and the lower opening of the cofferdam is controlled within 5 mm.
And 5, after the step 4 is completed, monitoring the verticality between the upper opening of the cofferdam total section and the lower opening of the cofferdam total section, and taking the verticality as an adjustment basis for welding of a subsequent device. In the embodiment, two angle steels vertical to the bulkhead surface are respectively arranged at the strong structure positions of the upper port left and right side boards of the carrying and positioning surface of the cofferdam total section, and lead wires 7 for plumb installation are installed on the angle steels; before step 4 is completed, the plumb bob on the plumb-wire rope is not installed temporarily, after step 4 is completed, the steel wire rope is connected with the plumb bob, and the verticality between the upper opening of the cofferdam and the lower opening of the cofferdam is monitored through the plumb bob.
The present invention is further explained and not limited by the embodiments, and those skilled in the art can make various modifications as necessary after reading the present specification, but all the embodiments are protected by the patent law within the scope of the claims.
Claims (10)
1. A method for controlling loading of a cofferdam total section of an LNG ship is used for loading and positioning the cofferdam total section onto a cofferdam loading butt joint section, and is characterized by comprising the following steps:
step 1, before the transverse bulkhead block is loaded and hoisted, a central line and a height datum line which are perpendicular to each other are arranged on a loading positioning surface of the transverse bulkhead block, and reflecting sheets are respectively pasted at the two end positions of the central line and the two end positions of the height datum line;
step 2, surveying a hull central line, a height positioning datum point and a bulkhead hard gear butt joint line on the bulkhead carrying butt joint section;
step 3, respectively arranging a columnar positioning backer at the port and starboard positions of the compartment hard retaining lines on the compartment carrying butt joint sections, wherein the positioning backer is arranged on the front surface side or the tail surface side of the transverse compartment total section;
step 4, hoisting the transverse bulkhead block to the carrying butt joint subsection for carrying and positioning by means of guiding and positioning of a positioning backer; the lower opening of the transverse bulkhead total section is jointed with the bulkhead hard stop; the accuracy of the butt joint of the lower opening of the transverse bulkhead total section and the bulkhead hard stop is adjusted by the butt joint of the bulkhead hard stop; measuring and positioning the center line of the hull, the height positioning datum point and the reflector plate by using a total station to adjust the position of the cofferdam total section;
and 5, after the step 4 is finished, monitoring the verticality between the upper opening of the transverse bulkhead block section and the lower opening of the transverse bulkhead block section, and taking the verticality as an adjustment basis for welding of a subsequent device.
2. The LNG carrier cofferdam block loading control method as claimed in claim 1, further comprising the steps of arranging two angle steels perpendicular to the surface of the cofferdam at the strong structure positions of the upper port left and right sides of the loading positioning surface of the cofferdam block, wherein the angle steels are provided with lead wires for plumb installation; and a steel wire rope for adjusting the verticality of the carried transverse bulkhead block and fixing the upper opening of the bulkhead is respectively arranged at the upper opening port-and-starboard strong structure position of the head end face of the bulkhead and the upper opening port-and-starboard strong structure position of the tail end face of the bulkhead.
3. The LNG ship cofferdam block loading control method according to claim 2, wherein the plumb on the plumb line is temporarily not installed until step 4 is completed, the wire rope is connected to the plumb after step 4 is completed, and the plumb is used to monitor the perpendicularity between the cofferdam upper opening and the cofferdam lower opening.
4. The LNG ship cofferdam block loading control method according to claim 1, wherein the angular dimension of the center line and the height reference line is controlled within 2 mm.
5. The LNG ship cofferdam block loading control method according to claim 1, wherein the position of the height reference line is determined by moving the cofferdam upper opening down 100mm along the center line with reference to the center line.
6. The LNG carrier cofferdam block carrying control method according to claim 1, wherein in step 4, after the cofferdam block is carried and hoisted in place, a jacking device is respectively arranged at the left, middle and right positions of the lower opening of the cofferdam, the jacking device is arranged at the side of the cofferdam block, and the carrying position of the cofferdam block is adjusted by using a hydraulic oil pump.
7. The LNG ship cofferdam block loading control method according to claim 1, wherein in the step 4, the positional deviation of the center line is controlled to be within 2mm, the height deviation of the height reference point is controlled to be within 3mm, and the perpendicularity between the upper opening and the lower opening of the cofferdam is controlled to be within 5 mm.
8. The LNG ship cofferdam block loading control method according to claim 1, wherein in step 3, the positioning backer is installed on the hard wire, and the alignment verticality of the positioning backer and the hard wire is controlled within 1 mm.
9. The LNG ship cofferdam total section embarkation control method as claimed in claim 3, wherein the lead wire rope is arranged on the angle steel at a position 50-100mm away from the cofferdam face, the perpendicularity between the upper hatch and the lower hatch is monitored by a plumb bob after the perpendicularity adjustment between the upper hatch and the lower hatch is completed, and the adjustment operation is performed when the change of the perpendicularity exceeds a set range.
10. An LNG ship comprising a cofferdam block and a bay-mounted docking section, wherein the cofferdam block is mounted to the bay-mounted docking section according to the method of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211510838.6A CN115837966B (en) | 2022-11-29 | 2022-11-29 | LNG ship transverse compartment block carrying control method and LNG ship |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211510838.6A CN115837966B (en) | 2022-11-29 | 2022-11-29 | LNG ship transverse compartment block carrying control method and LNG ship |
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| Publication Number | Publication Date |
|---|---|
| CN115837966A true CN115837966A (en) | 2023-03-24 |
| CN115837966B CN115837966B (en) | 2024-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211510838.6A Active CN115837966B (en) | 2022-11-29 | 2022-11-29 | LNG ship transverse compartment block carrying control method and LNG ship |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104875847A (en) * | 2015-05-28 | 2015-09-02 | 沪东中华造船(集团)有限公司 | Method for quickly carrying middle transverse bulkhead of container ship |
| CN111017145A (en) * | 2019-11-15 | 2020-04-17 | 上海江南长兴造船有限责任公司 | Method for carrying transverse bulkhead of ultra-large container ship |
| CN111703554A (en) * | 2020-05-09 | 2020-09-25 | 沪东中华造船(集团)有限公司 | Method for controlling total assembly and carrying precision of U-shaped total section of chemical tanker |
| CN112591033A (en) * | 2020-12-16 | 2021-04-02 | 上海华润大东船务工程有限公司 | Precision control process for ship refitting single-shell fuel tank |
| CN113911284A (en) * | 2021-11-01 | 2022-01-11 | 沪东中华造船(集团)有限公司 | Precision control method for assembling and carrying P-type total sections on chemical ship |
| CN115285311A (en) * | 2022-08-24 | 2022-11-04 | 江南造船(集团)有限责任公司 | Container ship transverse bulkhead assembly system and method |
-
2022
- 2022-11-29 CN CN202211510838.6A patent/CN115837966B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104875847A (en) * | 2015-05-28 | 2015-09-02 | 沪东中华造船(集团)有限公司 | Method for quickly carrying middle transverse bulkhead of container ship |
| CN111017145A (en) * | 2019-11-15 | 2020-04-17 | 上海江南长兴造船有限责任公司 | Method for carrying transverse bulkhead of ultra-large container ship |
| CN111703554A (en) * | 2020-05-09 | 2020-09-25 | 沪东中华造船(集团)有限公司 | Method for controlling total assembly and carrying precision of U-shaped total section of chemical tanker |
| CN112591033A (en) * | 2020-12-16 | 2021-04-02 | 上海华润大东船务工程有限公司 | Precision control process for ship refitting single-shell fuel tank |
| CN113911284A (en) * | 2021-11-01 | 2022-01-11 | 沪东中华造船(集团)有限公司 | Precision control method for assembling and carrying P-type total sections on chemical ship |
| CN115285311A (en) * | 2022-08-24 | 2022-11-04 | 江南造船(集团)有限责任公司 | Container ship transverse bulkhead assembly system and method |
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| CN115837966B (en) | 2024-06-11 |
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