Construction method of deck sections

Abstract

The invention relates to the technical field of ship construction, and discloses a deck section construction method which comprises the following steps that S1, a plurality of steel plates are flatly laid on a platform for assembly and assembly positioned welding to form a plate splicing piece, a butt joint seam is formed between every two adjacent steel plates, and the reverse side of the plate splicing piece faces upwards; s2, a structural part is installed on the reverse side of the jointed board part to form a deck segmented structure; s3, reverse welding of all butt joints is gradually completed from the center area of the deck segmented structure to the periphery; s4, the deck segmented structure is turned over, so that the front face of the plate splicing piece faces upwards; s5, front welding of all butt joints is gradually completed from the center area of the deck segmented structure to the periphery; and S6, the deck subsection structure is leveled, and construction of deck subsections is completed. According to the invention, the construction process of the deck sections can be simplified, the turning and leveling times of the jointed board pieces are reduced, and the flatness and construction efficiency of the deck are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a method for constructing deck sections. Background Art

[0002] Some special ships have strict requirements on the construction accuracy (especially flatness) of the deck, and the deformation of the deck structure needs to be strictly controlled during the construction process. The existing method of constructing deck sections is generally to complete the double-sided welding of the deck plate joints first, and then weld the deck's attached structural parts. The specific process is: 1. Assemble the deck panels on the platform and weld the front welds: first assemble and position-weld the straight steel plates that have been cut on the flat ground or platform to form deck panels, and then place the weight on the deck joints, and then complete the front welding of the deck panel joints; 2. Complete the reverse welding of the joints after turning over the deck panels: first install the lifting lugs on the sides of the deck panels, and then lift the weights off, and strengthen the panel joints perpendicular to the lifting direction (to prevent overturning). 1. Level the deck panels and weld the deck's auxiliary structural parts: After the welding of the reverse side welds of the deck panel joints is completed, lift the weight off again, level the deck panels again, grind the excess height of the steel plate butt welds in the structural line area, and then weld the deck's auxiliary structural parts to form deck sections; 2. Turn over and level the deck sections: Turn over the welded deck sections to an upright position, remove the temporary reinforcement plates perpendicular to the panel joints in the lifting direction, and level the deck again.

[0003] The existing method for constructing deck sections has the following disadvantages: 1. The deck panel welding process requires multiple placement and lifting of weights, resulting in many steps; 2. The deck panel welding process requires multiple turning over, resulting in many steps, and the turning over process will cause deformation of the deck panel; 3. Temporary reinforcement plates need to be installed and removed during the production of deck panels, resulting in many steps; 4. The height of the joints in the structural line area needs to be smoothed before installing the deck auxiliary structures, resulting in many steps; 5. The deck sections need to be leveled multiple times during manufacturing, resulting in many steps; 6. The rigidity and stability of the deck panel joints during welding are poor, resulting in large deformation of the deck panel during the welding process; 7. The flat fillet welds between the deck auxiliary structures and the deck panel are completed in one continuous welding, resulting in large accumulated stress and deformation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for constructing deck sections, which simplifies the construction process of deck sections, reduces the number of turning over and leveling of panel pieces, and improves the flatness of the deck and construction efficiency.

[0005] In order to solve the above technical problems, the present invention provides a method for constructing deck sections, comprising the following steps:

[0006] S1: Laying multiple steel plates flat on a platform and performing assembly and positioning welding to form a panel, wherein a butt joint is formed between two adjacent steel plates, and the reverse side of the panel faces upward;

[0007] S2: Installing structural members on the reverse side of the panel to form a deck segment structure;

[0008] S3: gradually completing the reverse side welding of all the butt joints from the center area of the deck segment structure toward the periphery;

[0009] S4: Turn over the deck segment structure so that the front side of the panel is facing upwards.

[0010] S5: gradually completing the front welding of all the butt joints from the central area of the deck segment structure toward the surrounding areas;

[0011] S6: Leveling the deck segment structure to complete the construction of the deck segment.

[0012] As a preferred embodiment of the present invention, in S2, after the structural member is arranged on the back side of the panel member, all the vertical angle welds between the structural member and the panel member are gradually completed from the central area of the deck segment structure to the surrounding directions; then, intermittent welding is adopted to gradually complete the welding of all the flat angle welds between the structural member and the panel member from the central area of the deck segment structure to the surrounding directions, wherein, during the welding process of the same flat angle weld, there is a gap between the two adjacent welding points to form a gap segment; finally, the welding of all the gap segments is gradually completed from the central area of the panel member to the surrounding directions.

[0013] As a preferred solution of the present invention, in S2, a clearance hole for the butt joint to pass through is provided at the bottom of the structural member.

[0014] As a preferred solution of the present invention, in S1, both sides of the butt joint are provided with grooves that gradually tilt inward from top to bottom.

[0015] As a preferred embodiment of the present invention, in S3, CO2 gas shielded semi-automatic welding is used to complete the reverse side welding of the butt joint; in S5, CO2 gas shielded automatic welding or submerged arc automatic welding is used to complete the front side welding of the butt joint.

[0016] As a preferred solution of the present invention, in S6, the deck segment structure is subjected to pyrotechnic correction.

[0017] An embodiment of the present invention provides a method for constructing a deck segment. Compared with the prior art, its beneficial effects are as follows: the present invention first assembles multiple steel plates to form a panel, then installs structural members on the reverse side of the panel to form a deck segment structure, then completes the reverse side welding of the butt joint of the panel, then turns the deck segment structure over, and then completes the front side welding of the butt joint of the panel, and finally leveling the deck segment structure; when performing reverse side welding of the butt joint, this method does not require placing and lifting weights on the panel, and does not require installing and removing temporary reinforcement plates; when installing structural members, there is no need to grind the excess height of the butt joint in the structural line area; the entire construction process only requires one turning over operation of the deck segment structure, and fewer steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the steel plates of the present invention being paired and assembled to form a panel;

[0019] Figure 2 It is a partial structural schematic diagram of the butt joint of the present invention;

[0020] Figure 3 This is a structural diagram showing the structural member of the present invention being installed on the reverse side of the splicing plate;

[0021] Figure 4 This is a structural diagram of the deck segment structure after turning over;

[0022] Figure 5 This is a structural diagram of the present invention after the vertical fillet weld between the structural member and the splicing plate is welded;

[0023] Figure 6 This is a structural diagram of the flat fillet weld between the structural member and the splicing plate of the present invention after intermittent welding;

[0024] Figure 7 This is a structural diagram of the present invention after the interval section between the structural member and the splicing plate is welded;

[0025] Figure 8 2. It is a schematic structural diagram of the panel after the reverse side of the butt joint of the present invention is welded;

[0026] Figure 9 1 is a schematic structural diagram of the butt joint of the panel of the present invention after front welding;

[0027] In the figure, there are steel plates 1, panel parts 2, butt joints 3, structural parts 4, vertical fillet welds 41, flat fillet welds 42, spacers 43, clearance holes 44, and deck segment structures 5. DETAILED DESCRIPTION

[0028] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] S1: Laying multiple steel plates 1 flat on a platform and performing assembly and positioning welding to form a panel 2, wherein a butt joint 3 is formed between two adjacent steel plates 1, and the reverse side of the panel 2 faces upward;

[0031] S2: Structural members 4 are installed on the reverse side of the panel 2 to form a deck segment structure 5. In this embodiment, the structural members 4 include a plurality of structural plates arranged in a crisscross pattern, with the spacing between two adjacent structural plates being equal in the transverse direction and the spacing between two adjacent structural plates being equal in the longitudinal direction. Thus, the structural members 4 evenly divide the panel 2 into multiple areas, thereby significantly improving the stability and rigidity of the panel 2 and effectively reducing deformation during the subsequent welding process of the butt joint 3 of the panel 2.

[0032] S3: gradually complete the reverse side welding of all the butt joints 3 from the center area of the deck segment structure 5 to the surrounding areas, that is, gradually complete the welding operation from the center area of the panel 2 to the surrounding areas, and multiple people can work separately along the directions of the surrounding areas of the panel 2;

[0033] S4: Turn over the deck segment structure 5 so that the front of the panel 2 faces upwards.

[0034] S5: gradually complete the front welding of all the butt joints 3 from the central area of the deck segment structure 5 to the surrounding areas;

[0035] S6: Level the deck segment structure 5 to complete the construction of the deck segment.

[0036] In this method, a plurality of steel plates 1 are first assembled to form a panel 2, and then the structural member 4 is installed on the reverse side of the panel 2 to form a deck segment structure 5, and then the reverse side welding of the butt joint 3 of the panel 2 is completed, and then the deck segment structure 5 is turned over, and then the front side welding of the butt joint 3 of the panel 2 is completed, and finally the deck segment structure 5 is leveled. Since the structural member 4 has been installed on the reverse side of the panel 2 when the reverse side welding of the butt joint 3 is performed, that is, the structural member 4 has a certain reinforcing effect on the structure of the panel 2, so there is no need to place and lift the weight on the panel 2 during the welding process, and there is no need to install and remove the temporary reinforcement plate, and the number of processes is reduced. Since the alignment of the structural member 4 has not been completed when the structural member 4 is installed, The welding of the joint 3 does not require grinding the excess height of the joint 3 in the structural line area; the method is to first complete the installation of the structural member 4, and then complete the welding of the back and front sides of the joint 3 of the panel 2 in sequence. Compared with the existing technology that requires two turning operations (first complete the front side welding of the joint 3 of the panel 2, then turn the panel 2 over to complete the back side welding of the joint 3, and then complete the installation of the structural member 4 and turn it over again), the entire process of the method only requires one turning operation on the deck segment structure 5 during the entire construction process, with fewer steps; in summary, the method can simplify the construction process of the deck segment, reduce the number of turning and leveling of the panel 2, and improve the flatness and construction efficiency of the deck.

[0037] For example, in S2, after the structural member 4 is placed on the reverse side of the panel 2, all vertical fillet welds 41 between the structural member 4 and the panel 2 are gradually completed from the central area of the deck segment structure 5 to the surrounding areas, such as Figure 5 Then, intermittent welding is used to gradually complete the welding of all the flat fillet welds 42 between the structural member 4 and the panel 2 from the central area of the deck segment structure 5 to the surrounding direction. In the welding process of the same flat fillet weld 42, there is a gap between the two adjacent welds to form a gap section 43. The length of each weld is about 300-500mm. Figure 6 Finally, the welding of all the interval segments 43 is gradually completed from the central area of the puzzle piece 2 to the surrounding direction, as shown Figure 7As shown; that is, the installation of the structural member 4 is divided into three stages. The first stage completes the complete welding of all vertical angle welds 41 between the structural member 4 and the panel member 2. The second stage completes the partial welding of all flat angle welds 42 between the structural member 4 and the panel member 2 (multiple interval segments 43 of each flat angle weld 42 are not completed). The third stage completes the welding of all interval segments 43, thereby completing the complete welding of all flat angle welds 42; the vertical angle welds 41 and the flat angle welds 42 are operated in steps to facilitate welding operations, and the flat angle welds 42 are welded in two steps to avoid the accumulation and superposition of welding stress and welding deformation during continuous welding, resulting in excessive welding deformation; after completing the installation of the structural member 4, the structure evenly divides the panel member 2 into several firm areas, greatly improving the stability and rigidity, and effectively reducing the deformation in the subsequent welding process of the butt joint 3 of the panel member 2.

[0038] For example, in S2, a clearance hole 44 is provided at the bottom of the structural member 4 for the butt joint 3 to pass through. The provision of the clearance hole 44 allows sufficient space during welding, thereby ensuring the welding quality of the butt joint 3. In this embodiment, the structural member 4 includes a plurality of structural plates arranged in a crisscross pattern. The bottom of the structural plates arranged in the transverse direction are provided with a clearance hole 44 for the butt joint 3 arranged in the longitudinal direction to pass through, and the bottom of the structural plates arranged in the longitudinal direction are provided with a clearance hole 44 for the butt joint 3 arranged in the transverse direction to pass through.

[0039] For example, in S1 , both sides of the butt joint 3 are provided with grooves that gradually tilt inward from top to bottom. The grooves are opened when cutting materials so that multiple steel plates 1 can be tightly assembled to form a panel 2 and can facilitate welding of the butt joint 3 .

[0040] For example, in S3, CO2 gas shielded semi-automatic welding is used to complete the reverse side welding of the butt joint 3; in S5, CO2 gas shielded automatic welding or submerged arc automatic welding is used to complete the front side welding of the butt joint 3. Both the front side welding and the reverse side welding of the butt joint 3 are completed by continuous welding, with high welding efficiency and quality.

[0041] Illustratively, in S6 , the deck segment structure 5 is calibrated using pyrotechnics. In addition, other leveling methods, such as mechanical leveling, can also be used.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A method for constructing deck sections, characterized by: The following steps are involved: S1: Laying multiple steel plates flat on a platform and performing assembly and positioning welding to form a panel, wherein a butt joint is formed between two adjacent steel plates, and the reverse side of the panel faces upward; S2: Installing structural members on the reverse side of the panel to form a deck segment structure; S3: gradually completing the reverse side welding of all the butt joints from the center area of the deck segment structure toward the periphery; S4: Turn over the deck segment structure so that the front side of the panel is facing upwards. S5: gradually completing the front welding of all the butt joints from the central area of the deck segment structure toward the surrounding areas; S6: Leveling the deck segment structure to complete the construction of the deck segment.

2. The method for constructing a deck segment according to claim 1, characterized in that: In S2, after the structural member is arranged on the back surface of the panel member, all the vertical angle welds between the structural member and the panel member are gradually completed from the central area of the deck segment structure to the surrounding directions; then, intermittent welding is adopted to gradually complete the welding of all the flat angle welds between the structural member and the panel member from the central area of the deck segment structure to the surrounding directions, wherein, during the welding process of the same flat angle weld, there is a gap between two adjacent welding points to form a gap segment; finally, the welding of all the gap segments is gradually completed from the central area of the panel member to the surrounding directions.

3. The method for constructing a deck segment according to claim 2, characterized in that: In S2, a clearance hole is provided at the bottom of the structural member for the butt joint to pass through.

4. The method for constructing a deck segment according to claim 1, wherein: In S1, both sides of the joint are provided with grooves that gradually tilt inward from top to bottom.

5. The method for constructing a deck segment according to claim 1, characterized in that : In S3, CO2 gas shielded semi-automatic welding is used to complete the reverse side welding of the butt joint; in S5, CO2 gas shielded automatic welding or submerged arc automatic welding is used to complete the front side welding of the butt joint.

6. The method for constructing a deck segment according to claim 1, wherein: In S6, pyrotechnic correction is performed on the deck segment structure.

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