CN115593584B - LNG ship transverse compartment dock carrying welding method - Google Patents
LNG ship transverse compartment dock carrying welding method Download PDFInfo
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- CN115593584B CN115593584B CN202211391712.1A CN202211391712A CN115593584B CN 115593584 B CN115593584 B CN 115593584B CN 202211391712 A CN202211391712 A CN 202211391712A CN 115593584 B CN115593584 B CN 115593584B
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- 238000003466 welding Methods 0.000 title claims abstract description 202
- 238000000034 method Methods 0.000 title claims abstract description 42
- 210000001503 joint Anatomy 0.000 claims description 44
- 238000005192 partition Methods 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 6
- 210000000988 bone and bone Anatomy 0.000 claims description 3
- 239000006247 magnetic powder Substances 0.000 claims description 3
- 230000004308 accommodation Effects 0.000 claims 1
- 238000003032 molecular docking Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- B63B73/40—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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Abstract
The invention discloses a loading and welding method for a transverse bulkhead dock of an LNG ship. According to the method, the transverse compartment total section is fixed through the pistol horse board when being carried and welded with other total sections, the welding is divided into a plurality of working procedures for welding, and a symmetrical and simultaneous welding mode is adopted, so that the welding deformation of the transverse compartment total section when the dock is carried is reduced, the influence on the volume and the capacity of the LNG ship cargo compartment due to overlarge deviation of the perpendicularity of the transverse compartment is avoided, and the welding quality of the transverse compartment total section is improved.
Description
Technical Field
The invention belongs to the technical field of ship construction, and particularly relates to a method for carrying and welding a transverse compartment dock of an LNG ship.
Background
At present, when the transverse compartment dock of the LNG ship is carried, the transverse compartment is quite possibly inclined forwards, backwards and backwards as a whole after being welded and formed due to the fact that the height dimension of the total section of the transverse compartment is large and the deformation control is insufficient during welding, and the capacity of the LNG cargo compartment is insufficient. Therefore, strict precision control measures and proper welding methods are required to control the welding quality and verticality deviation of the transverse compartment.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a method for carrying and welding the transverse compartment dock of an LNG ship.
In order to achieve the above object, the present invention provides the following technical solutions:
The LNG ship transverse compartment dock carrying and welding method specifically comprises the following steps:
Firstly, hoisting and carrying a bottom total section in a dock, and hoisting and positioning bilge total sections on two sides of the bottom total section; after the lifting and carrying of the bottom block and the bilge block are completed, lifting the transverse compartment block on the bottom block; the transverse compartment total section comprises an upper transverse compartment total section and a lower transverse compartment total section;
Hoisting a lower total section of the transverse compartment on a bottom total section, wherein the bottom end of the lower total section of the transverse compartment is vertically connected with the bottom total section, and two sides of the bottom of the lower total section of the transverse compartment are connected with the bilge section;
thirdly, after hoisting of the lower block of the transverse compartment is completed, welding and connecting the flat butt joint of the large joints of the platform plates at two sides of the lower block of the transverse compartment with the bilge block, wherein the large joints of the platform plates at two sides of the lower block of the transverse compartment are symmetrically and simultaneously welded;
Fourthly, performing angle seam welding on the longitudinal truss plates inside the bottom end of the lower total section of the transverse compartment and the bottom total section; after the longitudinal truss plates are welded with the bottom block, welding the corner joints of the bottom of the transverse cabin wall plate of the lower transverse cabin block and the bottom block and the corner joints of the two sides of the transverse cabin wall plate of the lower transverse cabin block and the bottom oblique side plate of the bilge block;
step five, after the welding of the lower section of the transverse compartment is finished, hoisting and positioning the upper section of the transverse compartment on the lower section of the transverse compartment, after the hoisting and positioning of the upper section of the transverse compartment are finished, welding the transverse butt joint of the longitudinal girders in the lower end of the upper section of the transverse compartment with the lower section of the transverse compartment, and then welding the lower end of the transverse compartment wallboard of the upper section of the transverse compartment with the upper end of the transverse compartment wallboard of the lower section of the transverse compartment;
sixthly, welding the bone material butt joint between the upper transverse cabin section and the lower transverse cabin section after the lower end of the transverse cabin wall plate of the upper transverse cabin section and the transverse cabin wall plate of the lower transverse cabin section are welded;
Seventh, after the welding of the upper transverse bulkhead section and the lower transverse bulkhead section is completed, hoisting and positioning the side bulkhead sections on two sides of the transverse bulkhead section, welding the joint seams between the platform boards on two sides of the transverse bulkhead section and the longitudinal bulkhead of the side bulkhead section, and welding the joint seams between the transverse bulkhead on two sides of the transverse bulkhead section and the longitudinal bulkhead of the side bulkhead section to complete the welding of the transverse bulkhead section and the side bulkhead section;
Hoisting and positioning the top block of the side to the two sides of the upper end of the upper block of the transverse compartment, symmetrically welding the platform plates on the two sides of the upper block of the transverse compartment and the corner joint seam of the top oblique side plate of the top block of the side at the same time, symmetrically welding the longitudinal truss plates inside the two sides of the upper block of the transverse compartment and the vertical corner joint seam of the top oblique side plate of the top block of the side at the same time, and welding the transverse bulkheads on the two sides of the upper block of the transverse compartment and the elevation angle joint seam of the top oblique side plate of the top block of the side;
and ninth, after the welding of the side roof section and the upper section of the transverse bulkhead is finished, hoisting and positioning the deck section at the upper end of the upper section of the transverse bulkhead, welding the longitudinal girders at the upper end of the upper section of the transverse bulkhead with the corner joint of the deck section, and welding the upper end of the transverse bulkhead of the upper section of the transverse bulkhead with the corner joint of the deck section to finish the welding of the transverse bulkhead section.
The specific steps of the fourth step of welding the angle seam between the longitudinal truss plates inside the bottom end of the lower total section of the transverse compartment and the bottom total section are as follows: and (3) firstly carrying out angle seam welding on the longitudinal girder plates at the middle longitudinal girder positions in the bottom end of the lower main section of the transverse compartment and the bottom main section, and then symmetrically carrying out angle seam welding on the longitudinal girder plates at the two sides of the middle longitudinal girder in the bottom end of the lower main section of the transverse compartment and the bottom main section, wherein the longitudinal girder plates at the two sides of the middle longitudinal girder in the bottom end of the lower main section of the transverse compartment are symmetrically welded from the middle part of the transverse compartment to the side direction.
The welding of the bottom of the transverse cabin wall plate of the transverse cabin lower block and the corner joint of the bottom block and the two sides of the transverse cabin wall plate of the transverse cabin lower block and the corner joint of the bottom oblique side plate of the bilge block in the fourth step comprises the following specific steps: firstly, welding the bottom of a transverse cabin wall plate of a transverse cabin lower block with the corner joint seam of the bottom block, wherein the front transverse cabin wall plate and the rear transverse cabin wall plate of the transverse cabin lower block are welded with the corner joint seam of the bottom block at the same time, and the front transverse cabin wall plate and the rear transverse cabin wall plate of the transverse cabin lower block are symmetrically welded from the middle part of the transverse cabin lower block to the side direction; and after the bottom of the transverse cabin wall plate of the transverse cabin lower block is welded with the corner joint seam of the bottom block, welding both sides of the transverse cabin wall plate of the transverse cabin lower block with the corner joint seam of the bottom oblique side plate of the bilge block.
After the transverse butt joint of the stringers in the lower end of the upper section of the transverse bulkhead is welded with the lower section of the transverse bulkhead, symmetrically welding the side stringers on two sides of the stringers in the lower end of the upper section of the transverse bulkhead with the lower section of the transverse bulkhead, and symmetrically welding the side stringers on two sides of the stringers in the lower end of the upper section of the transverse bulkhead from the middle of the upper section of the transverse bulkhead to the side direction; when the lower end of the transverse cabin wall plate of the upper transverse cabin section is welded with the upper end of the transverse cabin wall plate of the lower transverse cabin section, the transverse cabin wall plates on the front side and the rear side of the upper transverse cabin section are welded at the same time, and the welding direction of the transverse cabin wall plate of the upper transverse cabin section and the transverse cabin wall plate of the lower transverse cabin section is symmetrically welded from the middle part of the transverse cabin to the side direction.
When the platform plates on the two sides of the transverse compartment main section are welded with the angle joints of the longitudinal bulkheads of the side main section and the transverse bulkheads on the two sides of the transverse compartment main section are welded with the vertical angle joints of the longitudinal bulkheads of the side main section, the platform plates on the two sides of the transverse compartment lower main section, the transverse bulkheads and the side main section are welded, and then the platform plates on the two sides of the transverse compartment upper main section, the transverse bulkheads and the side main section are welded.
The specific steps of welding the platform boards on the two sides of the lower total section of the transverse bulkhead and the side total section of the transverse bulkhead are as follows: the method comprises the steps of firstly, symmetrically welding the platform plates at two sides of a lower section of a transverse bulkhead with the angle joint of a longitudinal bulkhead of a side section, symmetrically welding the two sides of a front transverse bulkhead of the lower section of the transverse bulkhead with the vertical angle joint of the longitudinal bulkhead of the side section, symmetrically welding the two sides of a rear transverse bulkhead of the lower section of the transverse bulkhead with the vertical angle joint of the longitudinal bulkhead of the side section, and completing the welding of the platform plates at two sides of the lower section of the transverse bulkhead and the welding of the transverse bulkhead with the side section; the welding steps of the platform plates on the two sides of the upper section of the transverse bulkhead and the side section of the transverse bulkhead are the same as those of the platform plates on the two sides of the lower section of the transverse bulkhead and the side section of the transverse bulkhead.
The specific steps of welding the transverse bulkhead on the two sides of the upper block of the transverse bulkhead and the elevation angle seam of the top oblique side plate of the side top block are as follows: the two sides of the front transverse bulkhead of the upper section of the transverse bulkhead are symmetrically welded with the elevation angle joints of the top inclined side plates of the top section of the side board at the same time, and then the two sides of the rear transverse bulkhead of the upper section of the transverse bulkhead are symmetrically welded with the elevation angle joints of the top inclined side plates of the top section of the side board at the same time.
The specific steps of welding the angle seam between the stringers at the upper end of the upper section of the transverse bulkhead and the deck section are as follows: welding the middle stringers in the middle of the upper end of the upper section of the transverse compartment with the corner joint of the lower end of the deck section, and symmetrically welding stringers on two sides of the middle stringers in the upper end of the upper section of the transverse compartment from the middle of the upper section of the transverse compartment to the side direction; when the upper end of the transverse bulkhead of the upper section of the transverse bulkhead is welded with the corner joint of the deck section, the front transverse bulkhead of the upper section of the transverse bulkhead is welded with the corner joint of the deck section, and then the rear transverse bulkhead of the upper section of the transverse bulkhead is welded with the corner joint of the deck section; and the welding direction of the transverse bulkhead of the upper section of the transverse bulkhead and the angle seam of the deck section is symmetrically welded from the middle part of the transverse bulkhead to the side direction.
The perpendicularity of the transverse compartment total section is not more than 3mm in the assembly welding process of the transverse compartment total section; when the transverse compartment total section and the bottom total section are subjected to angle seam welding, the transverse compartment total section and the bottom total section are subjected to positioning welding through a plurality of pistol horse plates, and the distance between the pistol horse plates is 300-500mm; the pistol horse plates are respectively and vertically welded with the transverse compartment total section and the bottom total section, and when the transverse compartment total section and the longitudinal compartment wall plates of the side total section are subjected to angle seam welding, the transverse compartment total section and the longitudinal compartment wall plates of the side total section are subjected to positioning welding through a plurality of pistol horse plates, wherein the distance between the pistol horse plates is 300-500mm; when the transverse compartment total section and the deck total section are subjected to angle seam welding, the transverse compartment total section and the deck total section are subjected to positioning welding through a plurality of pistol horse plates, and the distance between the pistol horse plates is 300-500mm; the whole pistol horse board is L-shaped.
After the welding of the transverse compartment block and all other carrying blocks is finished, carrying out ultrasonic flaw detection and magnetic powder flaw detection on all welded corner joints, and repairing unqualified corner joints.
Based on the technical scheme, the LNG ship transverse compartment dock carrying and welding method has the following technical advantages through practical application:
1. according to the method for carrying and welding the transverse compartment dock of the LNG ship, the transverse compartment total sections and other carrying total sections are carried and welded through the pistol horse plates, welding is divided into a plurality of working procedures for welding, and a symmetrical and simultaneous welding mode is adopted, so that the welding deformation of the transverse compartment total sections during carrying of the dock is reduced, the influence on the volume and the cabin capacity of the LNG ship due to overlarge perpendicularity deviation of the transverse compartment is avoided, and the welding quality of the transverse compartment total sections is improved.
Drawings
Fig. 1 is a diagram showing a welding structure of a pistol horse plate in a welding method for loading LNG ship transverse bulkhead dock.
Fig. 2 is a view showing a dock section mounting sequence in the LNG ship transverse bulkhead dock mounting welding method according to the present invention.
Fig. 3 is a diagram showing a welding structure of a lower transverse bulkhead piece, a bottom piece and a bilge piece in the transverse bulkhead dock carrying welding method of the LNG ship according to the present invention.
Fig. 4 is a diagram showing a welding structure of a transverse bulkhead upper block and a transverse bulkhead upper block in the LNG ship transverse bulkhead dock carrying welding method of the present invention.
Fig. 5 is a diagram showing a welding structure of a lower cross deck block and a side block in the LNG ship cross deck dock mounting welding method according to the present invention.
Fig. 6 is a diagram showing a welding structure of an upper cross deck block and a side block in the LNG ship cross deck dock mounting welding method according to the present invention.
Fig. 7 is a diagram showing a welding structure of a transom upper header and a topboard header in a transom dock mounting welding method for an LNG ship according to the present invention.
Fig. 8 is a diagram showing a welding structure of a cross deck upper block and a deck block in the LNG ship cross deck dock mounting welding method of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following is illustrated by the accompanying drawings
The specific examples shown in (c) illustrate the invention. It is to be understood that this description is merely exemplary
And are not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The invention relates to a method for carrying and welding a transverse compartment dock of an LNG ship, which is shown in figures 1-8, and specifically comprises the following steps:
Firstly, lifting and carrying a bottom total section 1 in a dock, and lifting and positioning bilge total sections 2 on two sides of the bottom total section 1; after lifting and carrying of the bottom block 1 and the bilge block 2 are completed, lifting the transverse compartment block on the bottom block 1; the transverse compartment total section comprises a transverse compartment upper total section 4 and a transverse compartment lower total section 3;
Hoisting a lower transverse compartment total section 3 on a bottom total section 1, wherein the bottom end of the lower transverse compartment total section 3 is vertically connected with the bottom total section 1, and two sides of the bottom of the lower transverse compartment total section 3 are connected with the bilge part total section 2;
Thirdly, after hoisting the lower transverse compartment section 3, welding the flat butt joints of the large joints 31 of the platform plates at two sides of the lower transverse compartment section 3 with the bilge section 2, wherein the large joints 31 of the platform plates at two sides of the lower transverse compartment section 3 are symmetrically and simultaneously welded;
Fourthly, performing angle seam welding on the longitudinal truss plates 32 in the bottom end of the transverse compartment lower total section 3 and the bottom total section 1; after the longitudinal truss plates 32 are welded with the bottom block 1, welding the bottom of the transverse cabin wall plate 33 of the transverse cabin lower block 3 with the bottom block corner joint and welding the two sides of the transverse cabin wall plate 33 of the transverse cabin lower block 3 with the bottom oblique side plate corner joint 34 of the bilge block 2;
Fifthly, after the welding of the lower transverse compartment section 3 is completed, hoisting and positioning the upper transverse compartment section 4 on the lower transverse compartment section 3, after the hoisting and positioning of the upper transverse compartment section 4 are completed, welding the transverse butt joint of the longitudinal girders 41 in the lower end of the upper transverse compartment section 4 with the lower transverse compartment section 3, and then welding the lower end of the transverse compartment wall plate 33 of the upper transverse compartment section 4 with the upper end of the transverse compartment wall plate 33 of the lower transverse compartment section 3;
sixthly, welding the bone butt joint between the upper transverse compartment section 4 and the lower transverse compartment section 3 after the lower end of the transverse compartment wall plate 33 of the upper transverse compartment section 4 is welded with the transverse compartment wall plate 33 of the lower transverse compartment section 3;
seventh, after the welding of the upper transverse partition section 4 and the lower transverse partition section 3 is completed, hoisting and positioning the side transverse partition sections 5 on two sides of the transverse partition sections, welding the corner joints of the platform plates 51 on two sides of the transverse partition sections and the longitudinal bulkheads 52 of the side transverse partition sections 5, and welding the corner joints of the transverse bulkheads on two sides of the transverse partition sections and the longitudinal bulkheads 52 of the side transverse partition sections 5 to finish the welding of the transverse partition sections and the side transverse partition sections 5;
Hoisting and positioning the top block 6 on two sides of the upper end of the upper block 4 of the transverse compartment, symmetrically welding the platform plates 51 on two sides of the upper block 4 of the transverse compartment and the top inclined side plate angle joints 61 of the top block 6 at the same time, symmetrically welding the longitudinal truss plates 32 on two sides of the upper block 4 of the transverse compartment and the top inclined side plate vertical angle joints 62 of the top block 6 at the same time, and welding the transverse bulkheads on two sides of the upper block 4 of the transverse compartment and the top inclined side plate elevation angle joints 63 of the top block 6;
And ninth, after the welding of the side roof section 6 and the transverse bulkhead upper section 4 is completed, hoisting and positioning the deck section 7 at the upper end of the transverse bulkhead upper section 4, welding the angle joint of the longitudinal girders at the upper end of the transverse bulkhead upper section 4 and the deck section 7, and welding the angle joint of the transverse bulkhead upper end of the transverse bulkhead upper section 4 and the deck section 7 to complete the welding of the transverse bulkhead section.
The specific steps of the fourth step of performing the corner seam welding between the stringer plate 32 inside the bottom end of the lower section 3 of the transverse compartment and the bottom section 1 are as follows: the method comprises the steps of firstly carrying out angle seam welding on the longitudinal girders 32 at the middle longitudinal girders 41 in the bottom end of the lower transverse bulkhead section 3 and the bottom total section 1, and then carrying out angle seam welding on the longitudinal girders 32 at the two sides of the middle longitudinal girders 41 in the bottom end of the lower transverse bulkhead section 3 and the bottom total section 1 symmetrically, wherein the longitudinal girders 32 at the two sides of the middle longitudinal girders 41 in the bottom end of the lower transverse bulkhead section 3 are welded symmetrically from the middle part of the transverse bulkhead to the side direction.
The welding of the bottom and bottom section angle joints of the transverse cabin wall plate 33 of the transverse cabin lower section 3 and the bottom oblique side plate angle joints 34 of the two sides of the transverse cabin wall plate 33 of the transverse cabin lower section 3 and the bilge section 2 in the fourth step comprises the following specific steps: firstly, welding the bottom of a transverse cabin wall plate 33 of a transverse cabin lower total section 3 with a bottom total section angle joint, simultaneously welding front and rear transverse cabin wall plates 33 of the transverse cabin lower total section 3 with the bottom total section angle joint, and symmetrically welding the front and rear transverse cabin wall plates 33 of the transverse cabin lower total section 3 from the middle part of the transverse cabin lower total section 3 to the side direction; after the bottom and bottom total section corner joint seam welding of the transverse cabin wall plate 33 of the transverse cabin lower total section 3 is completed, the two sides of the transverse cabin wall plate 33 of the transverse cabin lower total section 3 and the bottom oblique side plate corner joint seam 34 of the bilge total section 2 are welded simultaneously.
After the transverse butt joint of the stringers 41 in the lower end of the upper transverse bulkhead section 4 is welded with the lower transverse bulkhead section 3, symmetrically welding the side stringers 42 on both sides of the stringers 41 in the lower end of the upper transverse bulkhead section 4 with the lower transverse bulkhead section 3, and symmetrically welding the side stringers 42 on both sides of the stringers 41 in the lower end of the upper transverse bulkhead section 4 from the middle of the upper transverse bulkhead section 4 to the broadside direction; when the lower end of the transverse cabin wall plate 33 of the transverse cabin upper total section 4 is welded with the upper end of the transverse cabin wall plate 33 of the transverse cabin lower total section 3, the transverse cabin wall plates 33 on the front side and the rear side of the transverse cabin upper total section 4 are welded at the same time, and the welding direction of the transverse cabin wall plate 33 of the transverse cabin upper total section 4 and the transverse cabin wall plate 33 of the transverse cabin lower total section 3 is symmetrically welded from the middle part of the transverse cabin to the side direction.
When the angle joints between the platform plates 51 on the two sides of the transverse bulkhead section and the longitudinal bulkhead 52 of the side bulkhead section 5 are welded and the angle joints between the transverse bulkhead on the two sides of the transverse bulkhead section and the longitudinal bulkhead 52 of the side bulkhead section 5 are welded, the platform plates 51 on the two sides of the lower transverse bulkhead section 3, the transverse bulkhead and the side bulkhead section 5 are welded, and then the platform plates 51 on the two sides of the upper transverse bulkhead section 4, the transverse bulkhead and the side bulkhead section 5 are welded.
The specific steps of welding the platform plates 51 on the two sides of the transverse bulkhead lower section 3 and the transverse bulkhead and the side section 5 are as follows: the method comprises the steps of firstly, symmetrically welding the joint seams of the platform plates 51 on two sides of a transverse bulkhead lower section 3 and the longitudinal bulkhead 52 of a side trunk section 5 at the same time, symmetrically welding the joint seams of the transverse bulkhead on two sides of the front part of the transverse bulkhead lower section 3 and the longitudinal bulkhead 52 of the side trunk section 5 at the same time, symmetrically welding the joint seams of the transverse bulkhead on two sides of the rear part of the transverse bulkhead lower section 3 and the longitudinal bulkhead 52 of the side trunk section 5 at the same time, and completing the welding of the platform plates 51 on two sides of the transverse bulkhead lower section 3 and the transverse bulkhead and the side trunk section 5; the welding steps of the platform plates 51 on the two sides of the transverse bulkhead upper section 4 and the transverse bulkhead and the side board section 5 are the same as the welding steps of the platform plates 51 on the two sides of the transverse bulkhead lower section 3 and the transverse bulkhead and the side board section 5.
The specific steps of welding the transverse bulkhead on both sides of the transverse bulkhead upper header 4 and the top oblique side plate elevation joint 63 of the side roof header 6 are as follows: the two sides of the front transverse bulkhead of the transverse cabin upper general section 4 and the elevation joint 63 of the top inclined side plate of the side roof general section 6 are symmetrically welded at the same time, and then the two sides of the rear transverse bulkhead of the transverse cabin upper general section 4 and the elevation joint 63 of the top inclined side plate of the side roof general section 6 are symmetrically welded at the same time.
The specific steps of welding the angle seam between the longitudinal girders at the upper end of the transverse compartment upper total section 4 and the deck total section 7 are as follows: welding the middle stringers 41 in the middle of the upper end of the upper transverse bulkhead section 4 with the corner joint of the lower end of the deck section 7, and symmetrically welding stringers on two sides of the middle stringers 41 in the upper end of the upper transverse bulkhead section 4 from the middle of the upper transverse bulkhead section 4 to the side direction; when the upper end of the transverse bulkhead of the transverse compartment upper section 4 is welded with the angle joint of the deck section 7, the front transverse bulkhead of the transverse compartment upper section 4 is welded with the angle joint of the deck section 7, and then the rear transverse bulkhead of the transverse compartment upper section 4 is welded with the angle joint of the deck section 7; the welding direction of the transverse bulkhead upper section 4 and the angle seam of the deck section 7 is symmetrically from the middle part of the transverse bulkhead to the side direction.
The perpendicularity of the transverse compartment total section is not more than 3mm in the assembly welding process of the transverse compartment total section; when the transverse compartment block and the bottom block 1 are subjected to angle seam welding, the transverse compartment block and the bottom block 1 are subjected to positioning welding through a plurality of pistol horse plates 8, and the distance between the pistol horse plates 8 is 300-500mm; the pistol horse plates 8 are respectively and vertically welded with the transverse compartment total section and the bottom total section 1, when the transverse compartment total section and the longitudinal bulkhead 52 plates of the side total section 5 are subjected to angle seam welding, the transverse compartment total section and the longitudinal bulkhead 52 plates of the side total section 5 are subjected to positioning welding through a plurality of pistol horse plates 8, and the distance between the pistol horse plates 8 is 300-500mm; when the transverse compartment block and the deck block 7 are subjected to angle seam welding, the transverse compartment block and the deck block 7 are subjected to positioning welding through a plurality of pistol horse plates 8, and the distance between the pistol horse plates 8 is 300-500mm; the pistol horse plate 8 is L-shaped as a whole.
After the welding of the transverse compartment block and all other carrying blocks is finished, carrying out ultrasonic flaw detection and magnetic powder flaw detection on all welded corner joints, and repairing unqualified corner joints.
The welding method of the transverse bulkhead section in the welding process adopts CO 2 semiautomatic welding, the welding wire is SF-3 or GFL-71Ni when the transverse bulkhead and the bottom section 1 are welded, and the welding wire GFL-71 is used for the welding part.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same; although the invention has been described in detail with reference to preferred embodiments, those skilled in the art will appreciate that
As will be appreciated by one of ordinary skill in the art; modifications may be made to the specific embodiments of the invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (10)
1. The LNG ship transverse compartment dock carrying welding method is characterized by comprising the following steps of:
Firstly, hoisting and carrying a bottom total section (1) in a dock, and hoisting and positioning bilge total sections (2) on two sides of the bottom total section (1); after lifting and carrying of the bottom block (1) and the bilge block (2) are completed, lifting the transverse compartment block on the bottom block (1); the transverse compartment total section comprises a transverse compartment upper total section (4) and a transverse compartment lower total section (3);
hoisting a lower transverse compartment total section (3) on a bottom total section (1), wherein the bottom end of the lower transverse compartment total section (3) is vertically connected with the bottom total section (1), and two sides of the bottom of the lower transverse compartment total section (3) are connected with the bilge part total section (2);
Thirdly, after hoisting of the lower transverse compartment main section (3) is completed, welding connection is carried out between the flat butt joint of the large joints (31) of the platform plates at two sides of the lower transverse compartment main section (3) and the bilge part main section (2), and the large joints (31) of the platform plates at two sides of the lower transverse compartment main section (3) are symmetrically welded at the same time;
Fourthly, performing angle seam welding on the stringer plates (32) in the bottom end of the transverse compartment lower total section (3) and the bottom total section (1); after the longitudinal truss plates (32) are welded with the bottom total section (1), welding the bottom of the transverse cabin wall plate (33) of the transverse cabin lower total section (3) with the bottom total section angle joint and welding the two sides of the transverse cabin wall plate (33) of the transverse cabin lower total section (3) with the bottom inclined side plate angle joint (34) of the bilge total section (2);
Fifthly, after the welding of the lower transverse compartment section (3) is completed, hoisting and positioning the upper transverse compartment section (4) on the lower transverse compartment section (3), after the hoisting and positioning of the upper transverse compartment section (4) are completed, welding the transverse butt joint of the longitudinal girders (41) in the lower end of the upper transverse compartment section (4) with the lower transverse compartment section (3), and then welding the lower end of the transverse compartment wall plate (33) of the upper transverse compartment section (4) with the upper end of the transverse compartment wall plate (33) of the lower transverse compartment section (3);
sixthly, welding the bone butt joint between the upper transverse cabin section (4) and the lower transverse cabin section (3) after the lower end of the transverse cabin wall plate (33) of the upper transverse cabin section (4) and the transverse cabin wall plate (33) of the lower transverse cabin section (3) are welded;
Seventh, after the welding of the upper transverse partition section (4) and the lower transverse partition section (3) is completed, hoisting and positioning the side transverse partition sections (5) on two sides of the transverse partition sections, welding the angle joint between the platform plates (51) on two sides of the transverse partition sections and the longitudinal bulkheads (52) of the side transverse partition sections (5), and welding the angle joint between the transverse bulkheads on two sides of the transverse partition sections and the longitudinal bulkheads (52) of the side transverse partition sections (5), so as to finish the welding of the transverse partition sections and the side transverse partition sections (5);
Hoisting and positioning the top block (6) on two sides of the upper end of the upper block (4) of the transverse compartment, symmetrically welding the platform plates (51) on two sides of the upper block (4) of the transverse compartment and the top oblique side plate angle joints (61) of the top block (6) at the same time, symmetrically welding the longitudinal truss plates (32) in two sides of the upper block (4) of the transverse compartment and the top oblique side plate angle joint (62) of the top block (6) at the same time, and welding the transverse bulkheads on two sides of the upper block (4) of the transverse compartment and the top oblique side plate angle joints (63) of the top block (6) of the top block;
And ninth, after the welding of the side roof section (6) and the transverse bulkhead upper section (4) is completed, hoisting and positioning the deck section (7) at the upper end of the transverse bulkhead upper section (4), welding the angle joint of the longitudinal girders at the upper end of the transverse bulkhead upper section (4) and the deck section (7), and welding the angle joint of the transverse bulkhead upper end of the transverse bulkhead upper section (4) and the deck section (7), thereby completing the welding of the transverse bulkhead section.
2. The welding method for the docking station of the transverse bulkhead of the LNG ship according to claim 1, wherein the specific steps of the fourth step of performing the angle seam welding between the stringer plate (32) inside the bottom end of the lower total section (3) of the transverse bulkhead and the bottom total section (1) are as follows: the method comprises the steps of firstly carrying out angle seam welding on a stringer plate (32) at the middle stringer (41) in the bottom end of a lower transverse bulkhead section (3) and the bottom end section (1), and then symmetrically carrying out angle seam welding on the stringer plates (32) at the two sides of the middle stringer (41) in the bottom end of the lower transverse bulkhead section (3) and the bottom end section (1), wherein the stringer plates (32) at the two sides of the middle stringer (41) in the bottom end of the lower transverse bulkhead section (3) are symmetrically welded from the middle of the transverse bulkhead section to the broadside direction.
3. The LNG ship transverse bulkhead dock carrying welding method according to claim 1, wherein the specific steps of welding the bottom and bottom total section angle joints of the transverse bulkhead plate (33) of the transverse bulkhead lower total section (3) and the bottom oblique side plate angle joints (34) of the transverse bulkhead plate (33) of the transverse bulkhead lower total section (3) and the bilge portion total section (2) in the fourth step are as follows: firstly, welding the bottom of a transverse cabin wall plate (33) of a transverse cabin lower total section (3) with a bottom total section corner joint, wherein front and rear transverse cabin wall plates (33) of the transverse cabin lower total section (3) are welded with the bottom total section corner joint at the same time, and the front and rear transverse cabin wall plates (33) of the transverse cabin lower total section (3) are symmetrically welded from the middle part of the transverse cabin lower total section (3) to the broadside direction; and after the bottom and bottom total section corner joint seam welding of the transverse cabin wall plate (33) of the transverse cabin lower total section (3) is finished, welding both sides of the transverse cabin wall plate (33) of the transverse cabin lower total section (3) and the bottom oblique side plate corner joint seam (34) of the bilge total section (2) at the same time.
4. The LNG ship transom dock carrying welding method according to claim 1, wherein in the fifth step, after welding the transverse butt seam of the stringers (41) in the lower end of the transom upper header (4) with the transom lower header (3), symmetrically welding the side stringers (42) on both sides of the stringers (41) in the lower end of the transom upper header (4) with the transom lower header (3), and symmetrically welding the side stringers (42) on both sides of the stringers (41) in the lower end of the transom upper header (4) from the middle of the transom upper header (4) to the broadside direction; when the lower end of a transverse cabin wall plate (33) of the transverse cabin upper total section (4) is welded with the upper end of a transverse cabin wall plate (33) of the transverse cabin lower total section (3), the transverse cabin wall plates (33) on the front side and the rear side of the transverse cabin upper total section (4) are welded at the same time, and the welding direction of the transverse cabin wall plate (33) of the transverse cabin upper total section (4) and the transverse cabin wall plate (33) of the transverse cabin lower total section (3) is symmetrically welded from the middle part of the transverse cabin to the side direction of the accommodation.
5. The LNG ship transverse bulkhead dock carrying welding method according to claim 1, wherein when the angle joints between the platform plates (51) on both sides of the transverse bulkhead block and the longitudinal bulkheads (52) of the side block (5) and the angle joints between the transverse bulkheads on both sides of the transverse bulkhead block and the longitudinal bulkheads (52) of the side block (5) are welded, the welding between the platform plates (51) on both sides of the lower transverse bulkhead block (3) and the transverse bulkheads and the side block (5) is performed, and then the welding between the platform plates (51) on both sides of the upper transverse bulkhead block (4) and the transverse bulkheads and the side block (5) is performed.
6. The LNG ship transverse bulkhead dock carrying welding method according to claim 5, wherein the specific steps of welding the platform boards (51) on both sides of the transverse bulkhead lower header section (3) and the transverse bulkhead and the side header section (5) are as follows: the method comprises the steps of firstly, symmetrically welding the joint seams of the platform plates (51) on two sides of a lower transverse bulkhead section (3) and the longitudinal bulkhead (52) of a side board section (5) at the same time, symmetrically welding the joint seams of the transverse bulkhead on two sides of the front part of the lower transverse bulkhead section (3) and the longitudinal bulkhead (52) of the side board section (5) at the same time, symmetrically welding the joint seams of the transverse bulkhead on two sides of the rear part of the lower transverse bulkhead section (3) and the longitudinal bulkhead (52) of the side board section (5) at the same time, and completing the welding of the platform plates (51) on two sides of the lower transverse bulkhead section (3) and the transverse bulkhead and the side board section (5); the welding steps of the platform plates (51) on the two sides of the upper transverse bulkhead section (4) and the welding steps of the transverse bulkhead wall and the side board section (5) are the same as those of the platform plates (51) on the two sides of the lower transverse bulkhead section (3) and the welding steps of the transverse bulkhead wall and the side board section (5).
7. The LNG ship transverse bulkhead dock carrying welding method according to claim 1, wherein the specific steps of welding transverse bulkheads on both sides of the transverse bulkhead upper header section (4) with the top oblique side plate elevation joint (63) of the side top header section (6) are as follows: the two sides of the front transverse bulkhead of the transverse cabin upper general section (4) and the elevation joint (63) of the top inclined side plate of the side roof general section (6) are symmetrically welded at the same time, and then the two sides of the rear transverse bulkhead of the transverse cabin upper general section (4) and the elevation joint (63) of the top inclined side plate of the side roof general section (6) are symmetrically welded at the same time.
8. The welding method for carrying out dock carrying on the transverse bulkhead of the LNG ship according to claim 1, wherein the specific steps of welding the angle seam between the upper end stringer of the upper header section (4) of the transverse bulkhead and the deck header section (7) are as follows: welding a middle longitudinal girder (41) at the middle part of the upper end of the transverse compartment upper total section (4) and a corner joint at the lower end of the deck total section (7), and symmetrically welding longitudinal girders at two sides of the middle longitudinal girder (41) at the upper end of the transverse compartment upper total section (4) from the middle part of the transverse compartment upper total section (4) to the side direction; when the upper end of the transverse bulkhead upper section (4) is welded with the corner joint of the deck section (7), the front transverse bulkhead of the transverse bulkhead upper section (4) is welded with the corner joint of the deck section (7), and then the rear transverse bulkhead of the transverse bulkhead upper section (4) is welded with the corner joint of the deck section (7); the welding direction of the transverse bulkhead upper section (4) and the angle seam of the deck main section (7) is symmetrically welded from the middle part of the transverse bulkhead to the broadside direction.
9. The LNG ship transom dock mounting and welding method of claim 1, wherein the transom block has a perpendicularity of not more than 3mm during the assembly and welding process; when the transverse compartment total section and the bottom total section (1) are subjected to angle seam welding, the transverse compartment total section and the bottom total section (1) are subjected to positioning welding through a plurality of pistol horse plates (8), and the distance between the pistol horse plates (8) is 300-500mm; the pistol horse plates (8) are respectively and vertically welded with the transverse compartment total section and the bottom total section (1), when the transverse compartment total section and the longitudinal bulkhead (52) plates of the side total section (5) are subjected to angle seam welding, the transverse compartment total section and the longitudinal bulkhead (52) plates of the side total section (5) are subjected to positioning welding through a plurality of pistol horse plates (8), and the distance between the pistol horse plates (8) is 300-500mm; when the transverse compartment total section and the deck total section (7) are subjected to angle seam welding, the transverse compartment total section and the deck total section (7) are subjected to positioning welding through a plurality of pistol horse plates (8), and the distance between the pistol horse plates (8) is 300-500mm; the whole pistol horse board (8) is L-shaped.
10. The welding method for loading LNG ship transverse bulkhead dock according to claim 1, wherein after the transverse bulkhead is welded to all other loading bulkheads, ultrasonic flaw detection and magnetic powder flaw detection are performed on all welded corner joints, and the unqualified corner joints are repaired.
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