CN117755449A - LNG ship segmentation key node construction method - Google Patents
LNG ship segmentation key node construction method Download PDFInfo
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- CN117755449A CN117755449A CN202311608508.5A CN202311608508A CN117755449A CN 117755449 A CN117755449 A CN 117755449A CN 202311608508 A CN202311608508 A CN 202311608508A CN 117755449 A CN117755449 A CN 117755449A
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- plate
- inclined side
- jig frame
- edge
- rounding
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- 238000010276 construction Methods 0.000 title claims description 19
- 230000011218 segmentation Effects 0.000 title description 3
- 238000003466 welding Methods 0.000 claims abstract description 22
- 238000004080 punching Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 210000001503 joint Anatomy 0.000 claims abstract description 6
- 238000009434 installation Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000009415 formwork Methods 0.000 claims 1
- 239000003949 liquefied natural gas Substances 0.000 description 11
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses a method for constructing a segmented key node of an LNG ship, which comprises the following steps: manufacturing a jig frame; knocking sample punching points on a rounding template of the jig frame; the inner longitudinal wall plate is hung on a horizontal jig frame, the plate edge of the inner longitudinal wall plate is aligned with a sample punching point on the rounding template, and then the inclined side plate is hung on the rounding jig frame and is butted with the inner longitudinal wall plate; spot welding and fixing the inclined side plate and the rounding template, and welding a butt joint seam between the inclined side plate and the inner longitudinal wall plate by using a full-automatic welding machine; a plurality of horse boards are arranged on the free edge of the inclined side board; and successively installing other components on the segments, and dismantling the horse plate after the installation is completed. According to the invention, the special jig frame is manufactured, and the edge of the inclined side plate is further fixed by matching with the horse plate, so that the integral deformation controllability of the inner longitudinal wall plate and the inclined side plate in the splicing and subsequent hoisting processes can be ensured.
Description
Technical Field
The invention relates to the technical field of ship construction, in particular to a method for constructing a segmented key node of an LNG ship.
Background
LNG vessels are well known as one of the three bright beads on the crown of shipbuilding and are known for transporting ultra-low temperature liquid natural gas. In comparison to other conventional main force vessel types, LNG vessels have several key nodes on the hull structure, which are also the most demanding key places for whole vessel construction. Through the construction of a series of LNG ships, for the connection of the inclined side plates and the inner longitudinal wall plates, the arc plates are adopted to replace the original three-plate centering structural mode at the present stage, the construction difficulty is reduced to some extent, but the splicing deformation control of the arc plates and the inner longitudinal wall plates is an important influencing factor for limiting the construction quality of key nodes.
Disclosure of Invention
In view of the above, the invention provides a method for constructing a segmented key node of an LNG ship, which can reduce welding deformation at the key node of the LNG ship in the construction process, thereby ensuring that the construction quality of the key node meets the requirement, avoiding unnecessary reworking and helping to improve the construction quality of the LNG ship.
The LNG ship segmentation key node construction method specifically comprises the following steps:
s1, manufacturing a jig frame;
specifically, first, a horizontal jig frame is manufactured and placed on the ground; then, fixing a plurality of round turning templates on one side of the horizontal jig frame according to the length of the inner inclined side plate, enabling the folding angle of the round turning templates to face the ground, and arranging an edge brace along the length of the inner inclined side plate, so that the edge brace is connected with the end parts of all the round turning templates to form the round turning jig frame, wherein the upper edge of the edge brace is flush with the upper edge of the lower folded edge of the round turning template;
s2, knocking out a sample punching point at a position 150mm away from the arc center of the rounding template;
s3, hanging the inner longitudinal wall plate on a horizontal jig frame, enabling the plate edge of the inner longitudinal wall plate to be aligned with a sample punching point on the rounding template, hanging the inclined side plate on the rounding jig frame, enabling the plate edge of the inclined side plate to be aligned with the sample punching point, and accordingly abutting against the inner longitudinal wall plate;
s4, spot welding and fixing the inclined side plate and the rounding die plate, and welding a butt joint seam between the inclined side plate and the inner longitudinal wall plate by using a full-automatic welding machine;
s5, installing a plurality of horse boards on the free edge of the inclined side board, wherein one end of each horse board is clamped on the free edge of the inclined side board and is welded and fixed with the inclined side board, and the other end of each horse board is welded and fixed with the edge opening brace;
s6, successively installing other components on the sections, and dismantling the horse plate after the installation is completed.
Preferably, the specific steps for manufacturing the horizontal jig frame in the step S1 are as follows: a plurality of transverse braces and a plurality of longitudinal braces are fixed into a whole in a staggered manner in the transverse and longitudinal directions to form a jig frame supporting frame of the horizontal jig frame; then, a column is vertically fixed at each intersection of the cross brace and the longitudinal brace, and the column is supported on the ground.
Preferably, the rounding die plate is vertically fixed on the longitudinal brace, and the upper edge of the hem of one end of the rounding die plate welded with the longitudinal brace is flush with the upper surface of the longitudinal brace.
Preferably, the distance between two adjacent rounding templates is 3000-3500mm, and the distance between two adjacent transverse braces and two adjacent longitudinal braces is 1000-1500mm.
Preferably, the distance between the round-turning template positioned at the most edge and the end of the inclined side plate is 500-1000mm.
Preferably, the rounding template is a folded plate, and two folded edges of the folded plate are transited through a section of circular arc.
Preferably, the edge opening brace is made of angle steel, and the opening of the bending part of the edge opening brace is upward.
The beneficial effects of the invention are as follows:
according to the invention, the special jig frame is manufactured, and the edge of the inclined side plate is further fixed by matching with the horse plate, so that the integral deformation controllability of the inner longitudinal wall plate and the inclined side plate in the splicing and subsequent hoisting processes can be ensured. The use number and the arrangement positions of the round turning templates are flexibly adjusted according to the length of the inclined side plates, so that the labor waste in jig frame manufacturing is reduced on the premise of ensuring that deformation is controllable. The novel filling cover surface of the full-position welding machine and the submerged arc welding automatic welding machine replaces the original manual welding mode, so that the welding efficiency and the welding quality are improved, and the construction quality of key nodes is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of the inner longitudinal wall panel and the inclined side panels suspended from the jig frame.
Fig. 2 is a schematic structural view of the jig frame.
Fig. 3 is a schematic structural view of the rounding die plate.
Fig. 4 is a schematic structural view of the horse board.
The meaning of the reference numerals in the figures is:
1 is a horizontal jig frame, 11 is a transverse brace, 12 is a longitudinal brace, and 13 is a stand column;
2 is a rounding jig frame, 21 is a rounding template, and 22 is a side opening brace;
3 is an inclined side plate;
4 is an inner longitudinal wall plate;
and 5 is a horse board.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is 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 terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
For a better understanding of the technical solution of the present invention, the following detailed description of the present invention refers to the accompanying drawings.
The invention provides a method for constructing a segmented key node of an LNG ship, which specifically comprises the following steps:
s1, manufacturing a jig frame.
The jig frame comprises a horizontal jig frame and a rounding jig frame arranged on one side of the horizontal jig frame along the length of the inclined side plate.
The horizontal jig frame 1 comprises a plurality of cross braces 11 and longitudinal braces 12 which are staggered into a whole in the transverse and longitudinal directions, and upright posts 13 vertically fixed at the intersection points of the cross braces 11 and the longitudinal braces 12, wherein the upright posts 13 are supported on the ground.
The round turning jig frame 2 comprises a plurality of round turning templates 21 and a side opening brace 22, wherein the round turning templates 21 are fixed on one side of the horizontal jig frame 1 at equal intervals along the length of the inner inclined side plate 3, and the side opening brace 22 is arranged along the length direction of the inner inclined side plate 3 and is fixed with the end parts of all round turning templates 21. I.e. the rounding die plate 21 is vertically fixed on the longitudinal braces 12, and the upper edge of the hem of the end welded with the longitudinal braces 12 is flush with the upper surface of the longitudinal braces 12.
The number of the round templates 21 is determined according to the arrangement position and the length of the inclined side plates 3, and the distance between two adjacent round templates 21 is 3000-3500mm. After the inclined side plate 3 is arranged on the jig frame, the distance between the round turning mold plate positioned at the most edge and the end of the inclined side plate is 500-1000mm. In the embodiment, the round templates 21 are provided with 3 blocks, and the distance between two adjacent round templates 21 is 3000-3500mm, so that the deformation of the inclined side plate 3 is controllable during welding heat input.
The round turning template 21 is a folded plate, two folded edges of the round turning template are transited through a section of circular arc, and the length of each folded edge is slightly larger than that of the inclined side plate. In the embodiment, the included angle between the two folded edges is 135 degrees, and the two folded edges are transited through an arc of R150 mm.
In this embodiment, the cross braces 11, the longitudinal braces 12, the upright posts 13 and the side port braces 22 are all made of 150×150 angle steel, and the bending parts of the side port braces 22 are opened upwards.
Specifically, the method for manufacturing the jig frame comprises the following specific steps of:
first, a horizontal jig frame 1 is manufactured: a plurality of transverse braces 11 and a plurality of longitudinal braces 12 are fixed into a whole in a staggered manner in the transverse and longitudinal directions to form a jig support frame of the horizontal jig 1; then, vertically fixing a column 13 at each intersection of the cross brace 11 and the longitudinal brace 12, wherein the column 13 is supported on the ground; the spacing between every two adjacent transverse braces 11 and between every two adjacent longitudinal braces 12 is 1000-1500mm, and a construction space is provided for workers on the premise of ensuring the strength of the jig frame;
then, a rounding jig frame 2 is manufactured: according to the length of the inner inclined side plate 3, a plurality of round turning templates 21 are fixed on one side of the horizontal jig frame 1, the folding angles of the round turning templates 21 face the ground, and an edge brace 22 is arranged along the length of the inner inclined side plate 3, so that the edge brace 22 is connected with the end parts of all the round turning templates 21 to form the round turning jig frame 2, and the upper edges of the edge brace 22 are flush with the upper edges of the lower folds of the round turning templates 21.
S2, knocking out a sample punching point at a position 150mm away from the arc center of the rounding template 21, wherein the sample punching point is used as a positioning reference point of the inner longitudinal wall plate 4 during splicing.
S3, hanging the inner longitudinal wall plate 4 on the horizontal jig frame 1, slowly adjusting the position of the inner longitudinal wall plate by using a chain block to enable the plate edge of the inner longitudinal wall plate to be aligned with a sample punching point on the round transfer template 21, hanging the inclined side plate 3 on the round transfer jig frame 2, enabling the plate edge of the inclined side plate to be aligned with the sample punching point so as to be butted with the inner longitudinal wall plate 4, and controlling a butt joint gap between the inner longitudinal wall plate 4 and the inclined side plate 3 to be within 2 mm.
S4, spot welding and fixing the inclined side plate 3 and the rounding template 21, welding a butt joint between the inclined side plate 3 and the inner longitudinal wall plate 4 by using an all-position welding machine and a submerged arc automatic welding machine, and checking the straightness of a butt joint surface after welding.
S5, a plurality of horse plates 5 are arranged on the free edge of the inclined side plate 3, one ends of the horse plates 5 are clamped on the free edge of the inclined side plate 3 and are welded and fixed with the inclined side plate 3, and the other ends of the horse plates 5 are welded and fixed with the edge opening brace 22.
S6, successively installing other components on the sections, and dismantling the horse plate 5 after the installation is completed.
It should be understood that the described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Claims (7)
1. The method for constructing the LNG ship sectional key nodes is characterized by comprising the following steps of:
s1, manufacturing a jig frame;
specifically, first, a horizontal jig frame is manufactured and placed on the ground; then, fixing a plurality of round turning templates on one side of the horizontal jig frame according to the length of the inner inclined side plate, enabling the folding angle of the round turning templates to face the ground, and arranging an edge brace along the length of the inner inclined side plate, so that the edge brace is connected with the end parts of all the round turning templates to form the round turning jig frame, wherein the upper edge of the edge brace is flush with the upper edge of the lower folded edge of the round turning template;
s2, knocking out a sample punching point at a position 150mm away from the arc center of the rounding template;
s3, hanging the inner longitudinal wall plate on a horizontal jig frame, enabling the plate edge of the inner longitudinal wall plate to be aligned with a sample punching point on the rounding template, hanging the inclined side plate on the rounding jig frame, enabling the plate edge of the inclined side plate to be aligned with the sample punching point, and accordingly abutting against the inner longitudinal wall plate;
s4, spot welding and fixing the inclined side plate and the rounding die plate, and welding a butt joint seam between the inclined side plate and the inner longitudinal wall plate by using a full-automatic welding machine;
s5, installing a plurality of horse boards on the free edge of the inclined side board, wherein one end of each horse board is clamped on the free edge of the inclined side board and is welded and fixed with the inclined side board, and the other end of each horse board is welded and fixed with the edge opening brace;
s6, successively installing other components on the sections, and dismantling the horse plate after the installation is completed.
2. The LNG ship segment key node construction method according to claim 1, wherein the specific steps of manufacturing the horizontal jig frame in step S1 are: a plurality of transverse braces and a plurality of longitudinal braces are fixed into a whole in a staggered manner in the transverse and longitudinal directions to form a jig frame supporting frame of the horizontal jig frame; then, a column is vertically fixed at each intersection of the cross brace and the longitudinal brace, and the column is supported on the ground.
3. The LNG ship segment key node construction method of claim 2, wherein the rounding mold plate is vertically fixed to the longitudinal braces, and the upper edge of the flange of one end welded to the longitudinal braces is flush with the upper surface of the longitudinal braces.
4. The LNG ship segment key node construction method of claim 2, wherein a distance between two adjacent rounding templates is 3000-3500mm, and a distance between two adjacent cross braces and two adjacent longitudinal braces is 1000-1500mm.
5. The LNG ship segment key node construction method according to claim 1 or 3 or 4, wherein the distance between the round-turning formwork located at the extreme side and the inclined side slab ends is 500-1000mm.
6. The LNG ship segment key node construction method according to claim 1, wherein the rounding mold plate is a folded plate and two folded edges thereof are transited by a section of arc.
7. The LNG ship segment key node construction method according to claim 1, wherein the side port braces are made of angle steel, and the bending positions of the side port braces are opened upwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311608508.5A CN117755449A (en) | 2023-11-29 | 2023-11-29 | LNG ship segmentation key node construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311608508.5A CN117755449A (en) | 2023-11-29 | 2023-11-29 | LNG ship segmentation key node construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117755449A true CN117755449A (en) | 2024-03-26 |
Family
ID=90324704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311608508.5A Pending CN117755449A (en) | 2023-11-29 | 2023-11-29 | LNG ship segmentation key node construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117755449A (en) |
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2023
- 2023-11-29 CN CN202311608508.5A patent/CN117755449A/en active Pending
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