CN100443231C - Methods for installing and welding three-facet rubber tiles on liquidized natural gas ship - Google Patents
Methods for installing and welding three-facet rubber tiles on liquidized natural gas ship Download PDFInfo
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- CN100443231C CN100443231C CNB2006101181851A CN200610118185A CN100443231C CN 100443231 C CN100443231 C CN 100443231C CN B2006101181851 A CNB2006101181851 A CN B2006101181851A CN 200610118185 A CN200610118185 A CN 200610118185A CN 100443231 C CN100443231 C CN 100443231C
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Abstract
A technology for assembling and welding the triangular body used for the liquefied natural gas ship includes an assembling step and a welding step. For said assembling step, the 8 plates constituting said triangular body are supported by internal supporting plate and angular supporting plate to splice said triangular body. For said welding step, the diagonal cross welding is used in its 4 welding region.
Description
Technical field
The present invention relates to the manufacturing of LNG carrier, particularly the assembling and welding process of liquid natural gas carrier invar trihedral.
Background technology
LNG carrier (hereinafter to be referred as the LNG ship) big effect of play more and more aspect the liquefied natural gas transportation in the whole world, the invar parts of LNG ship are the vitals that its goods maintenance system keeps low temperature, and the invar trihedral then is a most important component in the invar parts.Fig. 1 is the schematic diagram of invar trihedral, and its making is that the invar trihedral composing plate that will machine adopts pure hand assembled, and manual welding is finished.The LNG ship must be strict controlled between 227.5 ± 0.7 invar trihedral precision, angle in 0～0.5 °, so high accuracy standard, all technology and patience all propose very high requirement for the operating personnel of each assembling.But, must there be a whole set of strict construction method could guarantee that each product of producing all reaches standard because each body otherness of operating personnel is bigger.To design and produce eight composing plate assemblings of invar trihedral of finishing and be welded into complete invar trihedral according to drawing, we must open up out new technical method according to the production practices needs.
Summary of the invention
The objective of the invention is to propose a kind of assembling and welding process of liquid natural gas carrier invar trihedral, utilize this assembling and welding process each composing plate dress of invar trihedral can be welded into complete invar trihedral, the quality of finishing reaches application requirements, and suitable large-scale production.
A kind of assembling and welding process of liquid natural gas carrier invar trihedral, comprise the assembly method of invar trihedral and the welding method of invar trihedral, the assembly method that it is characterized in that described invar trihedral is to utilize inner support panels and angle gripper shoe to be assembled into the method for invar trihedral plate of composing plate of invar trihedral, No. two plates, No. three plates, No. four plates, No. five plates, No. six plates, No. seven plates and No. eight plates; The welding method of described invar trihedral adopts the method that angular misalignment is welded with four welding regions of the invar trihedral that assembly unit is finished.
Described invar trihedral assembly method comprises the steps:
1. according to drawing, mark the position line of each plate in a plate of invar trihedral to be assembled, No. two plates, No. three plates, No. four plates, No. five plates, No. six plates, No. seven plates and No. eight mutual welding positions of plate;
2. be benchmark with a plate, No. four plates vertically are positioned over No. four plate position line places that plate has 135 ° of knuckle surfaces, measure with the magnet angle square and keep No. four plates to locate with the vertical laggard spot welding of plate;
3. place the lip-deep No. two plate position line places of 135 ° of knuckles of a plate parallel No. two plates, make No. two plates keep vertical and the spot welding location with a plate with the magnet angle square with No. four plates;
4. No. six plate vertical weldings are connected to No. six plate position line places on the plate No. two, No. four the plate vertical welding is connected to No. four plate position line places on the plate No. six, makes a plate, No. two plates, No. four plates, No. six plates surround a square bore;
5. No. eight plate position line places on No. six plates are vertical places No. eight plates, guarantees that No. eight plates and No. four plates are in same plane, and being in place then keeps vertical laggard spot welding with the magnet angle square;
6. in plate, No. two plates, No. four plates, square bore inner port place that No. six plate surrounded, two internal orifice gripper shoes are installed, No. two plates in the outside of square bore stitch vertical No. two plates in two ends and two first collar extension gripper shoes of No. six plate spot welding with No. six plate holders, and the plate in the outside of square bore stitches the vertical plate in two ends and two second collar extension gripper shoes of No. four plate spot welding with No. four plate holders;
7. on No. seven plate position lines of No. two plates, place No. seven plates, make No. seven plates parallel with plate and be in the same plane with No. six plates, with the magnet angle square No. seven plates are located with No. two vertical laggard spot weldings of plate, and in No. seven vertical No. seven plates of plate and No. two plate spot welding two the 3rd collar extension gripper shoes are installed with the crack two ends of No. two plate outer ends, at two ends that plate in the crack of No. seven plates and No. two plate the inners, the square bore outside and No. two plate holders stitch perpendicular to No. seven plates, No. two plates and a plate spot welding two the mouth gripper shoe all round;
8. with mounted invar trihedral upset, find out No. five plate position lines that backboard face drawn to determine the installation site of No. five plates, and guarantee that with the magnet angle square No. five plates keep vertical laggard spot welding to locate with a plate, on No. three plate position lines of a backboard face, be parallel to No. five plates and place No. three plates, with No. three plates of magnet angle square assurance and the vertical laggard spot welding of a plate location, stitch two ends perpendicular to a plate and two the 5th collar extension gripper shoes of No. three plate spot welding in a plate outer end and No. three plate holders, at a plate, two the 6th collar extension gripper shoes of No. three vertical described three plate spot welding with the two ends of No. five formed grooves of plate of plate are in plate vertical plate in crack two ends and two the 7th collar extension gripper shoes of No. five plate spot welding with No. five outside angles of plate;
9. guarantee that with a plurality of magnet angle squares No. five plates are vertical with a plate with No. three plates, check the parallel distance of No. three plates and No. five plates whether to meet the drawing requirement, check No. five plates, No. four plates and No. eight plates whether on same plane, whether No. three plates and No. two plates are on same plane, keep a plate smooth, the size and the angle of the inner bore of check trihedral, spot welding once more after undesirable the fine setting;
10. after eight blocks of invar plates of trihedral were installed and finished, the gusseted plate back that is in place increased spot welding, and the spot welding spacing is L, guarantees No. five plates, No. four plates, No. eight plates on same plane, and No. three plates, No. two plates are on same plane, and kept a plate smooth;
Described welding method comprises the steps:
1. fix the invar trihedral that described assembly unit is finished with two peripheral frame, a plurality of inflation aluminium sheet, a plurality of stiffened aluminium sheet and a plurality of anchor clamps, and at the edge at trihedral two ends welding run-on tab;
2. the invar trihedral that assembles is divided into four welding regions, first welding region is 4 angle weld metal zones of No. two plates, No. six plates and No. seven plate formation, second welding region is that a plate, No. four plates and No. five plates form 4 angle weld metal zones, the 3rd welding region is 4 angle welded seam areas of No. four plates, No. six plates and No. eight plate formation, and the 4th welding region is 4 angle welded seam areas of a plate, No. two plates and No. three plate formation;
3. weld 4 weld seams in the square bore of trihedral, according to before the square bore inseam of first welding region half section, the square bore inseam second half section of second welding region, preceding half section of the square bore inseam of the 3rd welding region, the square bore inseam second half section of the 4th welding region, the square bore inseam second half section of first welding region, preceding half section of the square bore inseam of second welding region, the square bore inseam second half section of the 3rd welding region, the preceding half section order of the square bore inseam of the 4th welding region is welded fixing successively to angular misalignment, the anchor clamps of welding region will not guarantee to clamp when welding, around the weld seam in each welding region 3 not welded seam must guarantee to inflate the aluminium sheet peace and fill protective gas, meeting positioning framework during welding hinders and must remove one by one, framework under the dismounting is mounted to the commissure of firm welding and installs and reinforce aluminium sheet;
4. weld outside 24 weld seams of trihedral, adopt the order to angular misalignment of step in 3. to weld each outside weld seam successively, the anchor clamps of welding region will not guarantee to clamp when welding, around the weld seam in each welding region 3 not welded seam must guarantee to inflate the aluminium sheet peace and fill protective gas, meet positioning framework during welding and hinder and must remove one by one, the framework under the dismounting is mounted to the commissure of firm welding and installs and reinforce aluminium sheet;
The Si Jiaochu of described internal orifice gripper shoe has gap.
Described collar extension gripper shoe has gap near the place, right angle of crack.
The square bore inseam of described welding adopts the welding manner of manual automatic feeding.
Outside each the bar weld seam of the square bore of described welding adopts the manual welding manner that adds silk.
The method of each bar weld seam of described welding is to external welding from 135 ° of angles of trihedral.
Technique effect of the present invention
Invar trihedral assembling and welding process of the present invention plays a part very important in the invar trihedral of liquefied natural gas ship cargo maintenance system is made, and has brought very big technical benefits, specifically following points:
1. the invar trihedral of producing satisfies the required precision of LNG carrier fully, and dimensional accuracy is 227.5 ± 0.7mm, and angular error is controlled in 0～0.5 °.
2. reduced the making error that different assembly crewmans bring more greatly because of individual difference.
3. the efficient that the invar trihedral is made be can improve, the cost and the time of making saved.
Description of drawings
Fig. 1 is the composition structure chart of invar trihedral.
Fig. 2 is the assembly unit schematic diagram of a plate of invar trihedral assembling and welding process of the present invention, No. two plates and No. four plates.
Fig. 3 is the assembly unit schematic diagram of No. six plates of invar trihedral assembling and welding process of the present invention.
Fig. 4 is the assembly unit schematic diagram of No. eight plates of invar trihedral assembling and welding process of the present invention.
Fig. 5 is the scheme of installation of invar trihedral assembling and welding process internal orifice gripper shoe of the present invention, the first collar extension gripper shoe and the second collar extension gripper shoe.
Fig. 6 is No. seven plate assembly units of invar trihedral assembling and welding process of the present invention and the 3rd collar extension gripper shoe and the scheme of installation of mouthful gripper shoe all round.
Fig. 7 is the scheme of installation of assembly unit, the 5th collar extension gripper shoe, the 6th collar extension gripper shoe and the 7th collar extension gripper shoe of No. three plates of invar trihedral assembling and welding process of the present invention and No. five plates.
Fig. 8 is the peripheral frame scheme of installation of invar trihedral assembling and welding process of the present invention.
Fig. 9 is the welding direction schematic diagram of invar trihedral assembling and welding process of the present invention.
Figure 10 is the welding region distribution schematic diagram of invar trihedral assembling and welding process of the present invention.
The specific embodiment
Below in conjunction with specific embodiment the present invention is described in further detail, but should not limit protection scope of the present invention with this.
The invar trihedral is made of eight composing plates that design and complete, the composing plate of eight dispersions dress is welded into is complete invar trihedral, method of the present invention comprises the assembly method of invar trihedral and the welding method of invar trihedral, and the assembly method of described invar trihedral is to utilize inner support panels and angle gripper shoe to be assembled into the method for invar trihedral plate of composing plate 1 of invar trihedral, No. two plates 2, No. three plates 3, No. four plates 4, No. five plates 5, No. six plates 6, No. seven plates 7 and No. eight plates 8;
Described invar trihedral assembly method comprises the steps:
1. according to drawing, mark the position line of each plate in the plate 1 of invar trihedral to be assembled, No. two plates 2, No. three plates 3, No. four plates 4, No. five plates 5, No. six plates 6, No. seven plates 7 and No. eight plate 8 mutual welding positions;
2. be benchmark with a plate 1, No. four plates 4 vertically are positioned over No. four plate position line places of plate 1 an edge 100mm of distance, measure No. four plates 4 of maintenance and plate 1 a vertical laggard spot welding location with the magnet angle square, adopt and do not have the argon arc welding spot welding of filling metal, the distance of spot welding is 40mm;
3. place No. two plate position line places on the plate 1 parallel No. two plates 2 with No. four plates 4, make No. two plates 2 keep vertical and the spot welding location with the magnet angle square with a plate 1, the distance of one lateral edges of No. four plates 4 of nothing of No. two plate position line to plates 1 is 240mm, adopt the argon arc welding of not having the filling metal to carry out spot welding, the distance of spot welding is 40mm, and the position relation of a plate, No. two plates and No. four plates as shown in Figure 2;
4. No. six plate 6 vertical weldings are connected to No. six plate position line places on the plate 2 No. two, No. four plate 4 vertical weldings are connected to No. four plate position line places on the plate 6 No. six, make plate 1, No. two plates 2, No. four plates 4, No. six plates 6 surround a square bore, square bore is of a size of 227～227.5mm, as shown in Figure 3;
5. No. eight plate position line places on No. six plates 6 are vertical places No. eight plates 8, guarantees that No. eight plates 8 and No. four plates 4 are in same plane, and being in place then keeps vertical laggard spot welding with the magnet angle square, and the distance of spot welding is similarly 40mm;
6. at the two ends of plate 1, No. two plates 2, No. four plates 4, No. six square bores that plate 6 is surrounded near install in the exit two with square bore measure-alike and four jiaos of internal orifice gripper shoes 10 that gap is arranged, vertical No. two plates 2 of No. two plates 2 in the outside of square bore and one first collar extension gripper shoe 91 of No. six plate 6 each spot welding with the angle at No. six plate 6 crack two ends, the vertical plate 1 of the plate 1 in the outside of square bore and one second collar extension gripper shoe 92 of No. four plate 4 each spot welding with the angle at No. four plate 4 crack two ends, as shown in Figure 5;
7. on No. seven plate position lines of No. two plates 2, place No. seven plates 7, make No. seven plates 7 and plate 1 parallel and be in the same plane with No. six plates 6, with the magnet angle square No. seven plates 7 are located with No. two plate 2 vertical laggard spot weldings, and in No. seven vertical No. seven plates 7 of plate 7 and two the 3rd collar extension gripper shoes 93 of No. two plate 2 spot welding installation with the crack two ends of No. two plate 2 outer ends, crack in No. seven plates 7 and No. two plate 2 the inners, a plate 1 in the square bore outside and the two ends of No. two plate 2 cracks are perpendicular to No. seven plates 7, No. two plates 2 and plate 1 spot welding two the is mouthful gripper shoe 94 all round, as shown in Figure 6;
8. with mounted invar trihedral upset, find out No. five plate position lines plate 1 back side drawing to determine the installation site of No. five plates 5, and guarantee that with the magnet angle square No. five plates 5 keep vertical laggard spot welding to locate with a plate 1, on No. three plate position lines at plate 1 back side, be parallel to No. five plates 5 and place No. three plates 3, with No. three plates 3 of magnet angle square assurance and plate 1 a vertical laggard spot welding location, at plate 1 outer end and No. three plate 3 crack two ends perpendicular to a plate 1 and two the 5th collar extension gripper shoes 95 of No. three plate 3 spot welding, at a plate 1, two the 6th collar extension gripper shoes 96 of No. three vertical described three plate spot welding of plate 3 with the two ends of No. five plate 5 formed grooves, in a vertical plate 1 of plate 1 and two the 7th collar extension gripper shoes 97 of No. five plate 5 spot welding with the crack two ends of No. five plate 5 outside angles, the spacing of carrying out spot welding all is 40mm, as shown in Figure 7;
9. guarantee that with a plurality of magnet angle squares No. five plates 5 are vertical with a plate 1 with No. three plates 3, check the parallel distance of No. three plates 3 and No. five plates 5 whether to meet the drawing requirement, check No. five plates 5, No. four plates 4 and No. eight plates 8 whether on same plane, whether No. three plates 3 and No. two plates 2 are on same plane, keep a plate 1 smooth, a plurality of gusseted plates are installed, the size and the angle of the inner bore of check trihedral, spot welding once more after undesirable the fine setting;
10. after eight blocks of invar plates of trihedral are installed and are finished, the gusseted plate back that is in place increases spot welding, and the spot welding spacing is 40mm, and the welding run-on tab guarantees that No. five plates 5, No. four plates 4, No. eight plates 8 are on same plane, No. three plates 3, No. two plates 2 are on same plane, and keep a plate 1 smooth;
Each welding region of invar trihedral that the welding method of described invar trihedral is finished assembly unit adopts the method to the angular misalignment welding.
Described welding method comprises the steps:
1. with two peripheral frame in each collar extension gripper shoe of trihedral two ends, be distributed in the invar trihedral that the fixing described assembly unit of totally two ten four blocks of inflation aluminium sheets, 16 stiffened aluminium sheets and a plurality of anchor clamps of outside three weld seams of square bore at four welding region two ends is finished, and at the edge at trihedral two ends welding run-on tab 17, as shown in Figure 8;
2. the invar trihedral that assembles is divided into four welding regions, first welding region 12 is 4 angle weld metal zones that No. two plates 2, No. six plates 6 and No. seven plates 7 form, second welding region 13 is 4 angle weld metal zones that plate 1, No. four plates 4 and No. five plates 5 form, the 3rd welding region 14 is 4 angle welded seam areas that No. four plates 4, No. six plates 6 and No. eight plates 8 form, the 4th welding region 15 is 4 angle welded seam areas that plate 1, No. two plates 2 and No. three 3 plates form, as shown in figure 10;
3. weld 4 weld seams in the square bore of trihedral, according to before first welding region, the 12 square bore inseams half section, the 13 square bore inseam second half sections of second welding region, preceding half section of the 3rd welding region 14 square bore inseams, the 15 square bore inseam second half sections of the 4th welding region, the 12 square bore inseam second half sections of first welding region, preceding half section of second welding region, 13 square bore inseams, the 14 square bore inseam second half sections of the 3rd welding region, the preceding half section order of the 4th welding region 15 square bore inseams is welded fixing successively to angular misalignment, weld the welding manner that square bore inseam adopts manual automatic feeding, the method of welding each bar weld seam is to external welding from 135 ° of angles of trihedral, as shown in Figure 9, the anchor clamps of welding region will not guarantee to clamp when welding, around the weld seam in each welding region 3 not welded seam must guarantee to inflate the aluminium sheet peace and fill protective gas, meet positioning framework during welding and hinder and must remove one by one, the framework under the dismounting is mounted to the commissure of firm welding and installs and reinforce aluminium sheet;
4. weld outside 24 weld seams of trihedral, adopt the order to angular misalignment of step in 3. to weld each outside weld seam successively, weld outside each the bar weld seam of square bore and adopt the manual welding manner that adds silk, the method of welding each bar weld seam is to external welding from 135 ° of angles of trihedral, the anchor clamps of welding region will not guarantee to clamp when welding, around the weld seam in each welding region 3 not welded seam must guarantee to inflate the aluminium sheet peace and fill protective gas, meet positioning framework during welding and hinder and must remove one by one, the framework under the dismounting is mounted to the commissure of firm welding and installs and reinforce aluminium sheet;
Undoubtedly, the assembling and welding process of invar trihedral of the present invention can also have other quantity value and connected mode, be not limited in the above-mentioned embodiment value be connected.In a word, protection scope of the present invention should comprise that those those of ordinary skills are conspicuous conversion or substitute.
Claims (8)
1. the assembling and welding process of a liquid natural gas carrier invar trihedral, comprise the assembly method of invar trihedral and the welding method of invar trihedral, the assembly method that it is characterized in that described invar trihedral is to utilize inner support panels, angle gripper shoe and peripheral frame to be assembled into the method for invar trihedral a plate of composing plate (1) of invar trihedral, No. two plates (2), No. three plates (3), No. four plates (4), No. five plates (5), No. six plates (6), No. seven plates (7) and No. eight plates (8); The welding method of described invar trihedral is that each welding region of invar trihedral that assembly unit is finished is adopted the method that angular misalignment is welded.
2. the assembling and welding process of liquid natural gas carrier invar trihedral according to claim 1 is characterized in that described invar trihedral assembly method comprises the steps:
1. according to drawing, mark the position line of each plate in a plate (1), No. two plates (2), No. three plates (3), No. four plates (4), No. five plates (5), No. six plates (6), No. seven plates (7) and the mutual welding position of No. eight plates (8) of invar trihedral to be assembled;
2. be benchmark with a plate (1), No. four plates (4) vertically are positioned over No. four plate position line places that a plate (1) has 135 ° of knuckle surfaces, measure, guarantee the vertical laggard spot welding of No. four plates (4) location with a plate (1) with the magnet angle square;
3. No. two plates (2) are placed the lip-deep No. two plate position line places of (1) 135 ° of knuckle of a plate parallel, measure, guarantee that No. two plates (2) and a plate (1) keep vertical and the spot welding location with the magnet angle square with No. four plates (4);
4. No. six plates (6) vertical welding is connected to No. six plate position line places on No. two plates (2), No. four plates (4) vertical welding is connected to No. four plate position line places on No. six plates (6), and then a plate (1), No. two plates (2), No. four plates (4) and No. six plates (6) surround a square bore;
5. No. eight plates (8) are vertically placed at No. eight plate position line places on No. six plates (6), guarantee that No. eight plates (8) and No. four plates (4) are in same plane, measure with the magnet angle square after being in place, guarantee No. six plates (6) and the vertical laggard spot welding of No. eight plates (8);
6. two-port is respectively installed an internal orifice gripper shoe (10) in the square bore that a plate (1), No. two plates (2), No. four plates (4), No. six plates (6) are surrounded, No. two plates in the outside of square bore (2) and No. six plate holder seam vertical No. two plates in two ends (2) and No. six plates (6) one first collar extension gripper shoes of each spot welding (91), the plate in the outside of square bore (1) and No. four plates (4) vertical plates in crack two ends (1) and No. four plates (4) one second collar extension gripper shoes of each spot welding (92);
7. on No. seven plate position lines of No. two plates (2), place No. seven plates (7), make No. seven plates (7) parallel with a plate (1) and be in the same plane with No. six plates (6), measure with the magnet angle square, make the vertical laggard spot welding of No. seven plates (7) location with No. two plates (2), at the 3rd collar extension gripper shoe (93) that vertical No. seven plates (7) and No. two plates (2) are installed in each spot welding of the crack two ends of No. seven plates (7) and No. two plates (2) outer end, crack in No. seven plates (7) and No. two plates (2) the inner, a plate (1) in the square bore outside and the two ends of No. two plates (2) crack are perpendicular to No. seven plates (7), each spot welding of No. two plates (2) and a plate (1) one piece the is mouthful gripper shoe (94) all round;
8. with mounted invar trihedral upset, find out No. five plate position lines drawing at a plate (1) back side to determine the installation site of No. five plates (5), and guarantee that with the magnet angle square No. five plates (5) and a plate (1) keep vertical laggard spot welding to locate, on No. three plate position lines at a plate (1) back side, be parallel to No. five plates (5) and place No. three plates (3), guarantee the vertical laggard spot welding of No. three plates (3) location with the magnet angle square with a plate (1), at plate (1) outer end and No. three plates (3) crack two ends perpendicular to a plate (1) and No. three plates (3) two the 5th collar extension gripper shoes of spot welding (95), at a plate (1), the vertical described plates in two ends (1) of No. three plates (3) and the formed groove of No. five plates (5), No. three plates (3) and No. five plates (5) one the 6th collar extension gripper shoes of each spot welding (96) are in crack two ends vertical plates (1) and No. five plates (5) each spot welding one piece seven collar extension gripper shoes (97) of a plate (1) with the outside angle of No. five plates (5);
9. guarantee that with a plurality of magnet angle squares No. five plates (5) are vertical with a plate (1) with No. three plates (3), check No. three plates (3) and the parallel distance of No. five plates (5) whether to meet the drawing requirement, check No. five plates (5), No. four plates (4) and No. eight plates (8) whether on same plane, whether No. three plates (3) and No. two plates (2) are on same plane, keep a plate (1) smooth, the size and the angle of the inner bore of check trihedral, spot welding once more after undesirable the fine setting;
10. after eight blocks of invar plates of trihedral are installed and are finished, after being in place, the gusseted plate increases spot welding, the spot welding spacing is L, L=40mm, guarantee that No. five plates (5), No. four plates (4), No. eight plates (8) are on same plane, No. three plates (3), No. two plates (2) are on same plane, and keep a plate (1) smooth.
3. the assembling and welding process of liquid natural gas carrier invar trihedral according to claim 1 is characterized in that described welding method comprises the steps:
1. with the fixing invar trihedral finished of assembly unit of two peripheral frame, a plurality of inflation aluminium sheet, a plurality of stiffened aluminium sheet and a plurality of anchor clamps, and at the edge at trihedral two ends welding run-on tab;
2. the invar trihedral that assembles is divided into 8 welding regions, first welding region (12) is 4 angle weld metal zones that No. two plates (2), No. six plates (6) and No. seven plates (7) form, second welding region (13) is that a plate (1), No. four plates (4) and No. five plates (5) form 4 angle weld metal zones, the 3rd welding region (14) is 4 angle welded seam areas that No. four plates (4), No. six plates (6) and No. eight plates (8) form, and the 4th welding region (15) is 4 angle welded seam areas that a plate (1), No. two plates (2) and No. three plates (3) form;
3. weld 4 weld seams in the square bore of trihedral, according to preceding half section of the square bore inseam of first welding region (12), the square bore inseam second half section of second welding region (13), preceding half section of the square bore inseam of the 3rd welding region (14), the square bore inseam second half section of the 4th welding region (15), the square bore inseam second half section of first welding region (12), preceding half section of the square bore inseam of second welding region (13), the square bore inseam second half section of the 3rd welding region (14), the preceding half section order of the square bore inseam of the 4th welding region (15) is welded fixing successively to angular misalignment, the anchor clamps of welding region will not guarantee to clamp when welding, around the weld seam in each welding region 3 not welded seam must guarantee to inflate logical protective gas in the aluminium sheet, prevent from oxidation or distortion to occur after the heating of trihedral composing plate, meeting positioning framework when welding hinders and must remove one by one, positioning framework under the dismounting is after the weld seam welding is finished, immediately with reinforcing the commissure that aluminium sheet is mounted to firm welding together;
4. weld outside 24 weld seams of trihedral; adopt the order to angular misalignment of step in 3. to weld each outside weld seam successively; the anchor clamps of welding region will not guarantee to clamp when welding; around the weld seam in each welding region 3 not welded seam must guarantee to inflate logical protective gas in the aluminium sheet; prevent from oxidation or distortion to occur after the heating of trihedral composing plate; meeting positioning framework when welding hinders and must remove one by one; positioning framework under the dismounting is after the weld seam welding is finished, immediately with reinforcing the commissure that aluminium sheet is mounted to firm welding together.
4. the assembling and welding process of liquid natural gas carrier invar trihedral according to claim 2 is characterized in that the Si Jiaochu of described internal orifice gripper shoe (10) has gap.
5. the assembling and welding process of liquid natural gas carrier invar trihedral according to claim 2 is characterized in that described collar extension gripper shoe has gap near the place, right angle of crack.
6. the assembling and welding process of liquid natural gas carrier invar trihedral according to claim 3 is characterized in that the square bore inseam of described welding adopts the welding manner of manual automatic feeding.
7. the assembling and welding process of liquid natural gas carrier invar trihedral according to claim 3 is characterized in that outside each the bar weld seam of the square bore of described welding adopts the manual welding manner that adds silk.
8. the assembling and welding process of liquid natural gas carrier invar trihedral according to claim 3, the method that it is characterized in that each bar weld seam of described welding for from the crevice place of 135 ° of angles of trihedral to external welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101181851A CN100443231C (en) | 2006-11-10 | 2006-11-10 | Methods for installing and welding three-facet rubber tiles on liquidized natural gas ship |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101181851A CN100443231C (en) | 2006-11-10 | 2006-11-10 | Methods for installing and welding three-facet rubber tiles on liquidized natural gas ship |
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| Publication Number | Publication Date |
|---|---|
| CN101028665A CN101028665A (en) | 2007-09-05 |
| CN100443231C true CN100443231C (en) | 2008-12-17 |
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| CNB2006101181851A Active CN100443231C (en) | 2006-11-10 | 2006-11-10 | Methods for installing and welding three-facet rubber tiles on liquidized natural gas ship |
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| CN114799425B (en) * | 2022-06-30 | 2022-11-11 | 中国空气动力研究与发展中心高速空气动力研究所 | Invar steel medium plate welding process |
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| CN101028665A (en) | 2007-09-05 |
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