CN115709787A - Sectional building method for deck of LNG (liquefied Natural gas) cabin - Google Patents
Sectional building method for deck of LNG (liquefied Natural gas) cabin Download PDFInfo
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- CN115709787A CN115709787A CN202211467831.0A CN202211467831A CN115709787A CN 115709787 A CN115709787 A CN 115709787A CN 202211467831 A CN202211467831 A CN 202211467831A CN 115709787 A CN115709787 A CN 115709787A
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Abstract
The invention discloses a sectional construction method of an LNG cabin deck, which comprises the steps of firstly, assembling and dividing the LNG cabin deck sections, and then constructing a middle group of an inner deck, an inner deck component and a main deck after division; the main deck comprises a first main deck middle group and a second main deck middle group which are respectively built and assembled, and after the structural form of the T-row through holes of the rib plates is changed, the divided groups are erected on a deck jig frame for assembly, so that the building of the LNG cabin deck sections is completed. According to the invention, through changing the shape of the T-row through holes on the rib plate part, the problem that the T-row blocks the through holes and cannot be installed when the rib plate falls vertically to be installed is avoided, the rib plate part is prevented from being scattered in bulk, and the construction efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of ship construction, and particularly relates to a sectional construction method for a deck of an LNG (liquefied natural gas) tank.
Background
The LNG cabin deck section is positioned at the top of the LNG cabin and is a cabin wall surface of the LNG cabin, and after the required flatness meets the requirement, the installation of an internal insulation module, the adhesion of a shielding layer and the like are carried out; the construction difficulty of the containment system inside the LNG cabin is high, the period is long, and if the construction problem of the deck section of the LNG cabin cannot be effectively solved, the ship products cannot be delivered according to the schedule; the LNG cabin deck has high requirements on the segmentation precision, and the inner deck is required to be built as a base surface, so that the flatness of the LNG cabin surface is ensured. The upper section bars of the main deck of the LNG cabin deck section are all made of flat-bulb steel and are symmetrical left and right; the inner deck is composed of two parts, one part is provided with T rows and flat bulb steel sectional materials which are symmetrical left and right, and the other part is composed of the inner deck and reinforcing ribs.
The conventional construction mode is that the main deck and the ribbed slab form a group, and the ribbed slab needs to be pulled in for construction; the rib plate pulling method is adopted for construction, special rib plate pulling equipment is needed for construction and installation, the production cost is high, and waste return such as operation is easily caused if the precision requirement does not meet the standard; when the construction is carried out by adopting a rib plate drawing method, the through holes in the T rows of the rib plates obstruct the assembly and welding of the main deck, the rib plates cannot vertically fall and need to fall after shifting to the side of the shipboard, but the shifting to the side of the shipboard can cause the flat-bulb steel to be blocked, so that most of sectional materials on the inner deck need to be scattered in bulk, the construction period of the LNG cabin deck sections is long, and the construction precision is reduced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a sectional construction method for an LNG cabin deck.
In order to achieve the purpose of the invention, the invention provides the following technical scheme:
a method for building an LNG cabin deck section specifically comprises the following steps:
the method comprises the following steps that firstly, assembly division is carried out on LNG cabin deck sections, and the LNG cabin deck sections comprise an inner deck middle group, inner deck components and a main deck after assembly division; the main decks comprise a first main deck middle group and a second main deck middle group;
secondly, manufacturing a rib plate component, a platform component, a rib plate group, a longitudinal girder component, a T row, flat-bulb steel and a longitudinal frame; the rib plate component comprises a rib plate, a first rib plate, a second rib plate and a third rib plate, and the longitudinal girder component comprises a first longitudinal girder piece and a second longitudinal girder piece;
thirdly, manufacturing an inner deck middle group, welding a spliced plate on a production line to manufacture an inner deck, and mounting the T rows and the flat bulb steels on the end surface of the inner deck to form the inner deck middle group after the inner deck is finished;
fourthly, manufacturing an inner deck component, welding a spliced plate on the deck jig frame to manufacture an inner deck, and installing reinforcing ribs on the end face of the inner deck to form the inner deck component;
fifthly, manufacturing a first main deck middle group, welding a jointed board on a production line to manufacture a first main deck, installing the longitudinal frame on the end face of the first main deck, and installing the rib plate component, the platform component, the longitudinal girder component and the rib plate small group on the longitudinal frame to assemble the first main deck middle group after the longitudinal frame is installed;
sixthly, manufacturing a second main deck middle group, welding a jointed board on a production line to manufacture a second main deck, installing the longitudinal ribs on the end face of the second main deck, and installing the rib plate component, the longitudinal girder component and the rib plate group on the end face of the second main deck middle group where the longitudinal ribs are located to assemble the second main deck middle group after the longitudinal ribs are installed;
and seventhly, folding the middle group of the inner deck, the inner deck parts and the main deck to assemble the LNG cabin deck section.
The rib plate, the first rib plate and the second rib plate in the second step are assembled into a complete rib plate, the whole rib plate is rectangular, a plurality of rib plate holes are formed in the end face of the rib plate, a plurality of rib plate through holes are formed in one side of the rib plate, a plurality of longitudinal frame mounting holes are formed in the other side of the rib plate, the rib plate through holes comprise T rows of through holes and flat-bulb steel through holes, the T rows and the flat-bulb steel on the end face of the inner deck are respectively inserted into the rib plate through holes in one side of the rib plate, and the longitudinal frames on the end face of the main deck are respectively inserted into the longitudinal frame mounting holes in the other side of the rib plate; the T row through hole is groove-shaped, the width of the T row through hole is larger than that of the upper portion of the T row, and when the T row is inserted into the T row through hole, the two sides of the T row through hole are respectively 35mm away from the two ends of the upper portion of the T row.
The specific steps for manufacturing the middle group of the inner deck comprise: the steel sheet is through the interior deck of makeup welding preparation on the assembly line, and interior deck preparation is accomplished the back, and including deck terminal surface facial make-up weld T row and flat bulb steel, interior deck terminal surface both sides weld the multirow T row, interior deck terminal surface middle part welds the multirow flat bulb steel, T row with the flat bulb steel is parallel to each other, T row with the flat bulb steel with interior deck terminal surface vertical welding.
The manufacturing of the inner deck member in the fourth step specifically comprises the following steps: the steel sheet is through the deck in makeup welding preparation on the assembly line, and the back is accomplished in the deck preparation, with many strengthening ribs welding on the interior deck terminal surface, form interior deck part, the strengthening rib with interior deck is connected perpendicularly.
The specific steps of the first main deck middle assembly in the fifth step are as follows:
s1, splicing and welding a plurality of main deck jointed boards into a first main deck on a production line, scribing a longitudinal installation line on the end face of the first main deck, installing a watertight patch board on one side of the first main deck, and after scribing the longitudinal installation line, respectively installing longitudinal beams on the first main deck along the longitudinal installation line, wherein the longitudinal installation lines are parallel to each other;
s2, a plurality of rib plates are equidistantly arranged on the longitudinal frame on one side of the first main deck, the rib plates are vertically connected with the longitudinal frame, and the bottoms of the rib plates are welded and fixed with the first main deck;
s3, after the rib plates are installed, a plurality of first rib plate pieces are installed on a longitudinal rib in the middle of the first main deck at equal intervals, the distance between every two adjacent first rib plate pieces is the same as the distance between every two adjacent rib plates, the first rib plate pieces are vertically connected with the longitudinal rib, and the bottom of each first rib plate piece is welded and fixed with the first main deck;
s4, after a first rib plate piece is installed, longitudinal girder parts are installed on two sides of the first rib plate piece respectively, the longitudinal girder parts are perpendicular to the first rib plate piece, the bottom of each longitudinal girder part is fixedly welded with a first main deck, a first longitudinal girder piece is installed at the joint of the first rib plate piece and the rib plate, and a second longitudinal girder piece is installed on one side, far away from the rib plate, of the first rib plate piece;
s5, after the longitudinal girder components are installed, installing a platform component above a watertight patch in the first main deck, wherein the platform component is vertically connected with the end face of the second longitudinal girder component;
s6, after the platform component is installed, a plurality of second rib plate pieces are installed on a longitudinal rib on one side of the end face of the first main deck at equal intervals, the rib plates and the rib plate pieces are installed on two sides of the first rib plate piece respectively, and the distance between every two adjacent second rib plate pieces is the same as the distance between every two adjacent first rib plate pieces;
s7, after the second rib plate is installed, installing a third rib plate on the end face of the first main deck, and installing a rib plate group at one end of the first main deck to form a first main deck middle group; the third rib plate is parallel to the ribs, and the rib group is parallel to the ribs.
The specific steps of the second main deck middle assembly in the sixth step are as follows:
s11, splicing and welding a plurality of main deck jointed boards into a second main deck on a production line, scribing a longitudinal installation line on the end face of the second main deck, and after the scribing of the longitudinal installation line is finished, respectively installing longitudinal bones on the second main deck along the longitudinal installation line, wherein the longitudinal installation lines are parallel to each other;
s12, the specific steps of installing the rib plate, the first rib plate, the longitudinal girder component, the second rib plate and the third rib plate on the end face of the second main deck are the same as the installation steps and the installation sequence of the rib plate, the first rib plate, the longitudinal girder component, the second rib plate and the third rib plate on the end face of the first main deck, and the rib plate, the first rib plate, the longitudinal girder component, the second rib plate and the third rib plate on the end face of the second main deck are installed on the second main deck according to the installation sequence of the rib plate, the first rib plate, the longitudinal girder component, the second rib plate and the third rib plate on the end face of the first main deck;
s13, a sealing plate is installed on the end face of the second main deck and installed on the side face of a rib plate group on the second main deck, one end of the sealing plate is vertically connected with one side of the rib plate group, and the other side of the sealing plate is vertically connected with one side of a second rib plate close to the rib plate group;
and S14, finishing the installation of the seal plates to form the second main deck middle group.
The concrete steps of folding and assembling the LNG cabin deck section in the seventh step are as follows:
s21, placing the manufactured middle inner deck group on a deck jig frame, placing the end faces of the T rows and the flat bulb steels in the middle inner deck group upwards, turning over the inner deck part for 180 degrees, placing the inner deck part on one side of the middle inner deck group, and enabling the end faces of the reinforcing ribs of the inner deck part to face the direction of the deck jig frame;
s22, turning over the first main deck middle group by 180 degrees, placing the first main deck middle group on the inner deck middle group, and respectively inserting the T rows and the flat-bulb steels on the end face of the inner deck into the T rows of through holes and the flat-bulb steel through holes on the rib plate of the corresponding first main deck middle group;
s23, turning over the second main deck middle group for 180 degrees, placing the second main deck middle group on the inner deck middle group, and respectively inserting the T rows and the flat-bulb steels on the end face of the inner deck into the corresponding T rows of through holes and the corresponding flat-bulb steel through holes on the rib plate members of the second main deck middle group;
s24, after the first main deck middle group and the second main deck middle group are installed, welding and fixing the joints of the inner deck middle group and the inner deck components, welding and fixing the bottom ends of the rib plate components, the stringer components and the rib plate small groups in the first main deck middle group and the second main deck middle group and the end faces of the inner deck middle group, and welding and fixing the joints of the first main deck middle group and the second main deck middle group to complete the sectional construction of the LNG cabin deck;
and S25, after the LNG cabin deck section construction is finished and the LNG cabin deck section precision is qualified, carrying out normal transportation by taking the middle group of the inner deck as a base plane to carry out spraying operation.
The inner deck component is spliced on one side of the length direction of the inner deck middle group, the length of the inner deck component is the same as that of the inner deck middle group, and the width of the inner deck component is smaller than that of the inner deck middle group.
When the middle group of the first main deck is installed, the watertight supplementary plate is located on one side of the end face of the middle group of the inner deck, the width of the middle group of the first main deck is equal to the sum of the width of the middle group of the inner deck and the width of the inner deck member, and the rib plate small group in the middle group of the first main deck is connected with the outer side of the inner deck member.
When the middle group of the second main deck is installed, one side of the sealing plate is connected with one side of the middle group of the first main deck, the width of the middle group of the second main deck is the same as that of the middle group of the first main deck, the rib plate group of the middle group of the second main deck is connected with the outer side of the inner deck component, and the rib plate group of the middle group of the second main deck is connected with the rib plate group of the middle group of the first main deck to form a complete rib plate group.
Based on the technical scheme, the LNG cabin deck sectional construction method disclosed by the invention has the following technical advantages through practical application:
1. according to the sectional construction method for the deck of the LNG cabin, the structural form of the T-row through holes in the rib plate members is changed, so that the problem that the T-row blocks the through holes and cannot be installed when the rib plate falls vertically to be installed is solved, the rib plate members are prevented from being scattered in bulk, and the construction efficiency is improved.
2. According to the LNG cabin deck section construction method, the structural form of the T-row through holes in the rib plate pieces is changed, the rib plate pieces can vertically fall down to be installed under the condition that rib plate pulling equipment is not used, construction cost is reduced, meanwhile, the LNG cabin deck sections are constructed in groups and folded, construction period is shortened, construction difficulty is reduced, and construction accuracy is improved.
Drawings
Fig. 1 is a sectional view of an LNG tank deck in a method for constructing an LNG tank deck section according to the present invention.
Fig. 2 is a structural view of a rib plate member before modification in a method for constructing an LNG tank deck section according to the present invention.
Fig. 3 is a modified structure view of a rib plate in the sectional construction method of the deck of the LNG tank according to the present invention.
Fig. 4 is a block diagram of an inner deck in the sectional construction method of the deck of the LNG tank according to the present invention.
Fig. 5 is a structural view of an inner deck member in a sectional construction method of an LNG tank deck according to the present invention.
Fig. 6 is a flow chart of the first main deck middle group assembling in the sectional construction method of the LNG tank deck.
Fig. 7 is a flow chart of the assembly of the second main deck in the sectional building method of the deck of the LNG tank.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will now be described by way of example only, as illustrated in the accompanying drawings. It is to be understood that this description is made only by way of example and not as a limitation on the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1 to 7, a method for constructing an LNG tank deck section specifically includes the following steps:
firstly, assembling and dividing an LNG cabin deck section 1, wherein the LNG cabin deck section 1 comprises an inner deck middle group 2, an inner deck component 3 and a main deck after being assembled and divided; the main decks comprise a first main deck middle group 4 and a second main deck middle group 5;
secondly, manufacturing a rib plate component, a platform component 75, a rib plate group 76, a longitudinal girder component, a T row 21, flat bulb steel 22 and a longitudinal frame 42; the rib members comprise a rib 71, a first rib member 72, a second rib member 73 and a third rib member 77, and the stringer members comprise a first stringer 78 and a second stringer 74;
thirdly, manufacturing an inner deck middle group 2, welding a spliced plate on a production line to manufacture an inner deck, and mounting the T rows 21 and the flat bulb steels 22 on the end surface of the inner deck to form the inner deck middle group 2 after the inner deck is finished;
fourthly, manufacturing an inner deck component 3, splicing and welding the inner deck on a deck jig frame to manufacture an inner deck, and installing reinforcing ribs 31 on the end face of the inner deck to form the inner deck component 3;
fifthly, manufacturing a first main deck middle group 4, welding a jointed board on a production line to manufacture a first main deck 41, installing the longitudinal ribs 42 on the end face of the first main deck 41, and after the longitudinal ribs 42 are installed, installing the rib plate components, the platform components 75, the longitudinal girder components and the rib plate small group 76 on the longitudinal ribs 42 to assemble the first main deck middle group 4;
sixthly, manufacturing a second main deck middle group 5, welding a spliced plate on a production line to manufacture a second main deck 51, installing the longitudinal ribs 42 on the end surface of the second main deck 51, and after the longitudinal ribs 42 are installed, installing the rib plate components, the longitudinal girder components and the rib plate small groups 76 on the end surface of the second main deck middle group 5 where the longitudinal ribs 42 are located to assemble the second main deck middle group 5;
and seventhly, folding the inner deck middle group 2, the inner deck parts 3 and the main deck to assemble the LNG cabin deck section 1.
The rib plate 71, the first rib plate 72 and the second rib plate 73 in the second step are assembled into a complete rib plate 6, the rib plate 6 is rectangular as a whole, a plurality of rib plate holes 63 are formed in the end face of the rib plate 6, a plurality of rib plate through holes are formed in one side of the rib plate 6, a plurality of longitudinal rib mounting holes 64 are formed in the other side of the rib plate 6, the rib plate through holes comprise T-row through holes 61 and bulb flat steel through holes 62, the T-row 21 and the bulb flat steel 22 on the end face of the inner deck are respectively inserted into the rib plate through holes in one side of the rib plate 6, and the longitudinal ribs 42 on the end face of the main deck are respectively inserted into the longitudinal rib mounting holes 64 in the other side of the rib plate 6; the T-row through hole 61 is groove-shaped, the width of the T-row through hole 61 is greater than the width of the upper part of the T-row 21, and when the T-row 21 is inserted into the T-row through hole 61, the distance between two sides of the T-row through hole 61 and two ends of the upper part of the T-row 21 is 35mm; by changing the structural form of the T-row through holes 61 on the rib plate parts 6, the problem that the T-row 21 blocks the through holes and cannot be installed when the rib plate falls vertically to be installed is avoided, the rib plate parts are prevented from being scattered in bulk, and the construction efficiency is improved.
The specific steps for manufacturing the inner deck middle group 2 are as follows: the steel sheet is through the deck in makeup welding preparation on the assembly line, and back is accomplished in the preparation of interior deck, and including the deck terminal surface facial make-up weld T row 21 and flat bulb 22, the multirow is welded to interior deck terminal surface both sides T row 21, the multirow is welded at interior deck terminal surface middle part flat bulb 22, T row 21 with flat bulb 22 is parallel to each other, T row 21 with flat bulb 22 with interior deck terminal surface vertical welding.
The specific steps of the manufacturing of the inner deck member 3 in the fourth step are as follows: the deck in the steel sheet welding preparation through the makeup on the assembly line, the back is accomplished in the deck preparation, with many strengthening ribs 31 welding on the interior deck terminal surface, form interior deck part 3, strengthening rib 31 with interior deck vertical connection.
The specific steps of manufacturing the group 4 in the first main deck in the fifth step are as follows:
s1, splicing and welding a plurality of main deck splicing plates into a first main deck 41 on a production line, scribing a longitudinal frame installation line on the end face of the first main deck 41, installing a watertight patching plate 43 on one side of the first main deck 41, and after scribing the longitudinal frame installation line, respectively installing longitudinal frames 42 on the first main deck 41 along the longitudinal frame installation line, wherein the longitudinal frame installation lines are parallel to each other;
s2, a plurality of rib plates 71 are equidistantly arranged on the longitudinal ribs 42 on one side of the first main deck 41, the rib plates 71 are vertically connected with the longitudinal ribs 42, and the bottoms of the rib plates 71 are fixedly welded with the first main deck 41;
s3, after the rib plates 71 are installed, a plurality of first rib plate pieces 72 are installed on the middle longitudinal frame 42 of the first main deck 41 at equal intervals, the distance between every two adjacent first rib plate pieces 72 is the same as the distance between every two adjacent rib plates 71, the first rib plate pieces 72 are vertically connected with the longitudinal frame 42, and the bottoms of the first rib plate pieces 72 are welded and fixed with the first main deck 41;
s4, after a first rib plate piece 72 is installed, longitudinal girder components are installed on two sides of the first rib plate piece 72 respectively, the longitudinal girder components are perpendicular to the first rib plate piece 72, the bottom of each longitudinal girder component is fixedly welded with a first main deck 41, a first longitudinal girder piece 78 is installed at the joint of the first rib plate piece 72 and the rib plate 71, and a second longitudinal girder piece 74 is installed on the side, far away from the rib plate 71, of the first rib plate piece 72;
s5, after the longitudinal girder components are installed, installing a platform component 75 above the watertight patch 43 in the first main deck 41, wherein the platform component 75 is vertically connected with the end face of the second longitudinal girder 74;
s6, after the platform part 75 is installed, a plurality of second rib plates 73 are equidistantly installed on the longitudinal frame 42 on one side of the end face of the first main deck 41, the rib plates 71 and the second rib plates 73 are respectively installed on two sides of the first rib plate 72, and the distance between every two adjacent second rib plates 73 is the same as that between every two adjacent first rib plates 72;
s7, after the second rib plates 73 are installed, installing third rib plates 77 on the end faces of the first main deck 41, and installing rib plate small groups 76 at one ends of the first main deck 41 to form a first main deck middle group 4; the third rib members 77 are parallel to the ribs 71, and the rib group 76 is parallel to the ribs 71.
The specific steps of manufacturing the group 5 in the second main deck in the sixth step are as follows:
s11, splicing and welding a plurality of main deck jointed boards into a second main deck 51 on a production line, scribing a longitudinal installation line on the end face of the second main deck 51, and after the longitudinal installation line is scribed, installing longitudinal beams 42 on the second main deck 51 along the longitudinal installation line respectively, wherein the longitudinal installation lines are parallel to each other;
s12, the specific steps of the installation of the rib 71, the first rib plate 72, the stringer member, the second rib plate 73 and the third rib plate 77 on the end surface of the second main deck 51 are the same as the installation steps and the installation sequence of the rib 71, the first rib plate 72, the stringer member, the second rib plate 73 and the third rib plate 77 on the end surface of the first main deck 41, and the rib 71, the first rib plate 72, the stringer member, the second rib plate 73 and the third rib plate 77 on the end surface of the second main deck 51 are installed on the second main deck 51 according to the installation sequence of the rib 71, the first rib plate 72, the stringer member, the second rib plate 73 and the third rib plate 77 on the end surface of the first main deck 41;
s13, a sealing plate 52 is mounted on an end face of the second main deck 51, the sealing plate 52 is mounted on a side face of the rib plate group 76 on the second main deck 51, one end of the sealing plate 52 is vertically connected with one side of the rib plate group 76, and the other side of the sealing plate 52 is vertically connected with one side of the second rib plate 73 close to the rib plate group 76;
and S14, completing the installation of the seal plates 52 to form the second main deck middle group 5.
The step seven, the closing and assembling of the LNG cabin deck section 1 specifically comprises the following steps:
s21, placing the manufactured inner deck middle group 2 on a deck jig frame, placing the T rows 21 and the flat bulb steels 22 in the inner deck middle group 2 upwards, turning over the inner deck part 3 for 180 degrees, placing the inner deck part at one side of the inner deck middle group 2, and placing the end face where the reinforcing ribs 31 of the inner deck part 3 are located towards the direction of the deck jig frame;
s22, turning over the first main deck middle group 4 by 180 degrees, placing the first main deck middle group 4 on the inner deck middle group 2, and respectively inserting the T rows 21 and the flat-bulb steels 22 on the end face of the inner deck into the corresponding T row through holes 61 and the flat-bulb steel through holes 62 on the rib plate members 6 of the first main deck middle group 4;
s23, turning over the second main deck middle group 5 by 180 degrees, placing the second main deck middle group 5 on the inner deck middle group 2, and respectively inserting the T rows 21 and the flat-bulb steels 22 on the end face of the inner deck into the corresponding T rows 21 through holes 61 and the flat-bulb steel through holes 62 on the rib plate members 6 of the second main deck middle group 5;
s24, after the first main deck middle group 4 and the second main deck middle group 5 are installed, welding and fixing the joints of the inner deck middle group 2 and the inner deck members 3, welding and fixing the bottom ends of the rib plate members, the stringer members and the rib plate small groups 76 in the first main deck middle group 4 and the second main deck middle group 2 and the end surfaces of the inner deck middle group 2, and welding and fixing the joints of the first main deck middle group 4 and the second main deck middle group 5 to complete the construction of the LNG cabin deck section 1;
and S25, after the LNG cabin deck section 1 is built, and after the precision of the LNG cabin deck section 1 is qualified through precision inspection, carrying out normal transportation by taking the inner deck middle group 2 as a base plane to carry out spraying operation.
The inner deck members 3 are spliced on one side of the length direction of the group 2 in the inner deck, the length of the inner deck members 3 is the same as that of the group 2 in the inner deck, and the width of the inner deck members 3 is smaller than that of the group 2 in the inner deck.
When the first main deck middle group 4 is installed, the watertight patch 43 is located on one side of the end face of the inner deck middle group 2, the width of the first main deck middle group 4 is equal to the sum of the width of the inner deck middle group 2 and the width of the inner deck member 3, and the rib plate small group 76 in the first main deck middle group 4 is connected with the outer side of the inner deck member 3.
When the second main deck middle group 5 is installed, one side of the sealing plate 52 is connected with one side of the first main deck middle group 4, the width of the second main deck middle group 5 is the same as that of the first main deck middle group 4, the rib plate small group 76 in the second main deck middle group 5 is connected with the outer side of the inner deck part 3, and the rib plate small group 76 in the second main deck middle group 5 is connected with the rib plate small group 76 in the first main deck middle group 4 to form a complete rib plate small group 76; the structural form of the T-shaped row 21 through holes 61 in the rib plate piece 6 is changed, the rib plate piece 6 can vertically fall and be installed under the condition that rib plate pulling equipment is not used, the construction cost is reduced, meanwhile, the LNG cabin deck sections 1 are constructed in groups and folded, the construction period is shortened, the construction difficulty is reduced, and the construction precision is improved.
When the first main deck middle group 4 and the second main deck middle group 5 are installed, the first main deck middle group 4 and the second main deck middle group 5 are respectively hoisted to the upper portion of the inner deck middle group 2 to be installed, and the first main deck middle group 4 and the second main deck middle group 5 are installed through vertical falling to complete the construction of the LNG cabin deck section 1.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will appreciate that; modifications of the specific embodiments of the invention or equivalent substitutions for parts of the technical features are possible; without departing from the spirit of the invention, it is intended to cover all modifications within the scope of the invention as claimed.
Claims (10)
1. The method for building the deck section of the LNG tank is characterized by comprising the following steps:
the method comprises the following steps that firstly, assembly division is carried out on LNG cabin deck sections (1), and the LNG cabin deck sections (1) comprise an inner deck middle group (2), inner deck parts (3) and a main deck after assembly division; the main decks comprise a first main deck middle group (4) and a second main deck middle group (5);
secondly, manufacturing a rib plate component, a platform component (75), a rib plate group (76), a longitudinal girder component, a T row (21), a flat bulb steel (22) and a longitudinal rib (42); the rib members comprise a rib (71), a first rib member (72), a second rib member (73) and a third rib member (77), and the stringer members comprise a first stringer (78) and a second stringer (74);
thirdly, manufacturing an inner deck middle group (2), welding a spliced plate on a production line to manufacture an inner deck, and mounting the T rows (21) and the flat bulb steels (22) on the end surface of the inner deck to form the inner deck middle group (2) after the inner deck is finished;
fourthly, manufacturing an inner deck component (3), splicing and welding the inner deck component on a deck jig frame to manufacture an inner deck, and installing reinforcing ribs (31) on the end surface of the inner deck to form the inner deck component (3);
fifthly, a first main deck middle group (4) is manufactured, a first main deck (41) is manufactured by splicing and welding on a production line, the longitudinal ribs (42) are installed on the end face of the first main deck (41), and after the longitudinal ribs (42) are installed, the rib plate components, the platform components (75), the longitudinal girder components and the rib plate small group (76) are installed on the longitudinal ribs (42) to be assembled into the first main deck middle group (4);
sixthly, manufacturing a second main deck middle group (5), splicing and welding on a production line to manufacture a second main deck (51), installing the longitudinal ribs (42) on the end face of the second main deck (51), and after the longitudinal ribs (42) are installed, installing the rib plate components, the longitudinal girder components and the rib plate small groups (76) on the end face of the second main deck middle group (5) where the longitudinal ribs (42) are located to assemble the second main deck middle group (5);
and seventhly, folding the inner deck middle group (2), the inner deck parts (3) and the main deck to assemble the LNG cabin deck section (1).
2. The sectional construction method for the deck of the LNG tank as claimed in claim 1, wherein the rib plate (71), the first rib plate member (72) and the second rib plate member (73) in the second step are assembled into a complete rib plate member (6), the rib plate member (6) is rectangular as a whole, a plurality of rib plate holes (63) are formed in an end surface of the rib plate member (6), a plurality of rib plate through holes are formed in one side of the rib plate member (6), a plurality of stringer mounting holes (64) are formed in the other side of the rib plate member (6), the rib plate through holes include T rows of through holes (61) and bulb flat steel through holes (62), the T rows (21) and the bulb flat steel (22) on the end surface of the inner deck are inserted into the rib plate through holes on one side of the rib plate member (6), and the stringers (42) on the end surface of the main deck are inserted into the stringer mounting holes (64) on the other side of the rib plate member (6); the T-row through hole (61) is groove-shaped, the width of the T-row through hole (61) is larger than the width of the upper part of the T-row (21), and when the T-row (21) is inserted into the T-row through hole (61), the distance between the two sides of the T-row through hole (61) and the two ends of the upper part of the T-row (21) is 35mm.
3. The method for building the deck section of the LNG tank as claimed in claim 1, wherein the specific steps for manufacturing the inner deck middle group (2) are as follows: the steel sheet is through the inner deck of makeup welding preparation on the assembly line, and after the preparation of interior deck was accomplished, including deck terminal surface facial make-up weld T row (21) and flat bulb steel (22), interior deck terminal surface both sides weld the dress multirow T row (21), interior deck terminal surface middle part welds the dress multirow flat bulb steel (22), T row (21) with flat bulb steel (22) are parallel to each other, T row (21) with flat bulb steel (22) with interior deck terminal surface vertical welding.
4. The method for building a deck section of an LNG tank according to claim 1, characterized in that the specific steps of the inner deck member (3) fabrication in the fourth step are: the deck in the steel sheet passes through makeup welding preparation on the assembly line, and the back is accomplished in the preparation of interior deck, with many strengthening ribs (31) welding on the interior deck terminal surface, form interior deck part (3), strengthening rib (31) with interior deck vertical connection.
5. The method for constructing deck sections of an LNG tank according to claim 1, characterized in that the specific steps for manufacturing the group (4) in the first main deck in the fifth step are:
s1, splicing and welding a plurality of main deck splicing plates into a first main deck (41) on a production line, scribing a longitudinal frame installation line on the end face of the first main deck (41), installing a watertight supplementary plate (43) on one side of the first main deck (41), and after scribing the longitudinal frame installation line, respectively installing longitudinal frames (42) on the first main deck (41) along the longitudinal frame installation line, wherein the longitudinal frame installation lines are parallel to one another;
s2, a plurality of rib plates (71) are equidistantly arranged on the longitudinal ribs (42) on one side of the first main deck (41), the rib plates (71) are vertically connected with the longitudinal ribs (42), and the bottoms of the rib plates (71) are fixedly welded with the first main deck (41);
s3, after the rib plates (71) are installed, a plurality of first rib plate pieces (72) are installed on the longitudinal frame (42) in the middle of the first main deck (41) at equal intervals, the distance between every two adjacent first rib plate pieces (72) is the same as the distance between every two adjacent rib plates (71), the first rib plate pieces (72) are vertically connected with the longitudinal frame (42), and the bottom of each first rib plate piece (72) is fixedly welded with the first main deck (41);
s4, after a first rib plate piece (72) is installed, longitudinal girder components are installed on two sides of the first rib plate piece (72) respectively, the longitudinal girder components are perpendicular to the first rib plate piece (72), the bottom of each longitudinal girder component is fixedly welded with a first main deck (41), a first longitudinal girder piece (78) is installed at the joint of the first rib plate piece (72) and the rib plate (71), and a second longitudinal girder piece (74) is installed on one side, far away from the rib plate (71), of the first rib plate piece (72);
s5, after the longitudinal girder components are installed, installing a platform component (75) above a watertight patch (43) in the first main deck (41), wherein the platform component (75) is vertically connected with the end face of the second longitudinal girder component (74);
s6, after the platform part (75) is installed, a plurality of second rib plates (73) are installed on the longitudinal frame (42) on one side of the end face of the first main deck (41) at equal intervals, the rib plates (71) and the second rib plates (73) are installed on two sides of the first rib plate (72) respectively, and the distance between every two adjacent second rib plates (73) is the same as that of the first rib plates (72);
s7, after the second rib plate piece (73) is installed, installing a third rib plate piece (77) on the end face of the first main deck (41), and installing a rib plate small group (76) at one end of the first main deck (41) to form a first main deck middle group (4); the third rib members (77) are parallel to the ribs (71), and the rib groups (76) are parallel to the ribs (71).
6. The method for constructing deck sections of an LNG tank according to claim 1, characterized in that the specific steps for manufacturing the second main deck group (5) in the sixth step are:
s11, splicing and welding a plurality of main deck jointed boards into a second main deck (51) on a production line, scribing a longitudinal installation line on the end face of the second main deck (51), and after the scribing of the longitudinal installation line is finished, respectively installing longitudinal beams (42) on the second main deck (51) along the longitudinal installation line, wherein the longitudinal installation lines are parallel to each other;
s12, the specific steps of installing the rib plates (71), the first rib plate pieces (72), the longitudinal girder components, the second rib plate pieces (73) and the third rib plate pieces (77) on the end face of the second main deck (51) are the same as the installation steps and the installation sequence of the rib plates (71), the first rib plate pieces (72), the longitudinal girder components, the second rib plate pieces (73) and the third rib plate pieces (77) on the end face of the first main deck (41), and the rib plates (71), the first rib plate pieces (72), the longitudinal girder components, the second rib plate pieces (73) and the third rib plate pieces (77) on the end face of the second main deck (51) are installed on the second main deck (51) according to the installation sequence of the rib plates (71), the first rib plate pieces (72), the longitudinal girder components, the second rib plate pieces (73) and the third rib plate pieces (77) on the end face of the first main deck (41);
s13, a sealing plate (52) is installed on the end face of the second main deck (51), the sealing plate (52) is installed on the side face of a rib plate group (76) on the second main deck (51), one end of the sealing plate (52) is vertically connected with one side of the rib plate group (76), and the other side of the sealing plate (52) is vertically connected with one side of a second rib plate piece (73) close to the rib plate group (76);
s14, the closing plates (52) are installed to form the second main deck middle group (5).
7. The method for building the LNG tank deck section according to the claim 1, wherein the seventh step of assembling the LNG tank deck section (1) comprises the following specific steps:
s21, placing the manufactured inner deck middle group (2) on a deck tire frame, placing the end faces of the T rows (21) and the flat bulb steels (22) in the inner deck middle group (2) upwards, turning over the inner deck part (3) for 180 degrees, and placing the inner deck part on one side of the inner deck middle group (2), wherein the end faces of the reinforcing ribs (31) of the inner deck part (3) face the direction of the deck tire frame;
s22, turning over a first main deck middle group (4) for 180 degrees, placing the first main deck middle group on an inner deck middle group (2), and inserting T rows (21) and flat-bulb steels (22) on the end face of the inner deck into corresponding T rows of through holes (61) and flat-bulb steel through holes (62) on a rib plate member (6) of the first main deck middle group (4) respectively;
s23, turning over a second main deck middle group (5) by 180 degrees, placing the second main deck middle group on the inner deck middle group (2), and inserting T rows (21) and flat-bulb steels (22) on the end face of the inner deck into corresponding T rows of through holes (61) and flat-bulb steel through holes (62) on a rib plate member (6) of the second main deck middle group (5);
s24, after the first main deck middle group (4) and the second main deck middle group (5) are installed, welding and fixing the joints of the inner deck middle group (2) and the inner deck components (3), welding and fixing the bottom ends of the rib plate components, the stringer components and the rib plate small groups (76) in the first main deck middle group (4) and the second inner deck middle group (2) and the end face of the inner deck middle group (2), welding and fixing the joints of the first main deck middle group (4) and the second main deck middle group (5), and completing the construction of the LNG cabin deck section (1);
and S25, after the LNG cabin deck section (1) is built, and after the precision of the LNG cabin deck section (1) is qualified through precision inspection, carrying out normal transportation by taking the inner deck middle group (2) as a base plane to carry out spraying operation.
8. LNG tank deck section building method according to claim 7, characterised in that the inner deck members (3) are spliced on one longitudinal side of the inner deck middle group (2), the length of the inner deck members (3) being the same as the length of the inner deck middle group (2), the width of the inner deck members (3) being smaller than the width of the inner deck middle group (2).
9. LNG tank deck section building method according to claim 7, characterised in that the watertight patch (43) is located on the end side of the inner deck middle group (2) when the first main deck middle group (4) is installed, that the width of the first main deck middle group (4) is equal to the sum of the inner deck middle group (2) width and the inner deck member (3) width, and that the rib plate small group (76) in the first main deck middle group (4) is connected to the outside of the inner deck member (3).
10. The method for constructing deck sections of an LNG tank according to claim 7, characterized in that when the second main deck middle group (5) is installed, the closing plate (52) side is connected to the first main deck middle group (4) side, the width of the second main deck middle group (5) is the same as the width of the first main deck middle group (4), the rib group (76) of the second main deck middle group (5) is connected to the outer side of the inner deck member (3), and the rib group (76) of the second main deck middle group (5) is connected to the rib group (76) of the first main deck middle group (4) as a complete rib group (76).
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| CN116765657A (en) * | 2023-06-05 | 2023-09-19 | 南通中远海运船务工程有限公司 | Welding method of thin plates in living area of crude oil transfer barge |
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| CN108177730A (en) * | 2017-12-25 | 2018-06-19 | 沪东中华造船(集团)有限公司 | A kind of integrated method of construction of topside segmentation |
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