A method for precision control of torsion box of ultra-large container ship and torsion box

Abstract

The present invention relates to a method for precision control of a torsion box of an ultra-large container ship and a torsion box thereof. The method comprises separately constructing an outer plate central assembly and an inner longitudinal wall plate central assembly, wherein the inner longitudinal wall plate central assembly comprises a main deck and inner longitudinal wall plates perpendicular to each other, and the outer plate central assembly comprises an outer plate. The inner longitudinal wall plate central assembly and the outer plate central assembly are combined to form a torsion box segment. Before the combination, a precision control plate is installed on each of the outer plate central assembly and the inner longitudinal wall plates. Through holes are provided on the precision control plate corresponding to the torsion box ribs, through which the torsion box ribs pass. After the inner longitudinal wall plate central assembly and the outer plate central assembly are combined, a connector is connected between the precision control plate of the outer plate central assembly and the precision control plate on the inner longitudinal wall plates. The precision control plate and the connector are removed when the torsion box segments are assembled. The present invention can effectively control the precision of the torsion box through the precision control plate and the connector, thereby solving the problem that the torsion box has a weak structure along the length of the ship and is easily deformed.

Description

Technical Field

[0001] The present invention relates to the field of shipbuilding, and in particular to a method for precision control of a torsion box of an ultra-large container ship and the torsion box. Background Art

[0002] The torsion box is a key structure of ultra-large container ships (container ships of 10,000 TEU and above), and is also the area where most special high-strength thick plates are concentrated. Its precision control is crucial. The main deck of the torsion box of ultra-large container ships uses ultra-thick crack arrest steel (thickness can reach 90mm), and there are special requirements for the welding and grinding of crack arrest steel. The first row of outer plates (thickness can reach 75mm) and inner longitudinal wall plates (thickness can reach 75mm) connected to the main deck are also ultra-thick plates, and there is a large thickness difference between the plates above the outer plates and the inner longitudinal wall plates, such as Figure 1 As shown, the thickness of the second row of outer panels connected to the first row of outer panels is 38 mm, and the thickness of the third row of outer panels connected to the second row of outer panels is 19 mm; the thickness of the second row of inner longitudinal wall panels connected to the first row of inner longitudinal wall panels is 38 mm, and the thickness of the third row of inner longitudinal wall panels connected to the second row of inner longitudinal wall panels is 19 mm.

[0003] There are fewer strong structures in the torsion box along the length of the ship. When the distance between the strong structure and the end is large, deformation is very likely to occur during construction and transportation, resulting in poor straightness of the outer plate and inner longitudinal wall plate, affecting the subsequent loading of the overall assembly.

[0004] In addition, tube bundle units and other outfitting parts need to be installed inside the torsion box segments. If conventional profiles are used for reinforcement and precision control, it is very easy to cause interference between the profiles and the tube bundle units and outfitting parts. The profiles used for precision control are cut off when the tube bundle units or outfitting parts are installed, resulting in discontinuous reinforcement, which not only causes a lot of rework, but is also not conducive to ensuring the precision of the torsion box, causing deformation of the torsion box. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a method for precision control of the torsion box of an ultra-large container ship and a torsion box. Through this precision control method, the accuracy of the torsion box segmentation can be guaranteed, and interference with the internal tube bundle units, outfitting parts, etc. of the torsion box during precision control can be avoided, thereby saving costs and improving ship construction efficiency.

[0006] The technical objectives of the present invention are achieved through the following technical solutions:

[0007] A method for precision control of the torsion box of an ultra-large container ship, wherein when the torsion box is constructed in sections, the outer plate middle assembly and the inner longitudinal wall plate middle assembly are constructed separately, the inner longitudinal wall plate middle assembly includes a main deck and an inner longitudinal wall plate perpendicular to each other, and the outer plate middle assembly includes an outer plate; the outer plate and the inner longitudinal wall plate are respectively made of plates of different thicknesses; the inner longitudinal wall plate middle assembly and the outer plate middle assembly are combined to form a torsion box section, the outer plate and the inner longitudinal wall plate are arranged parallel to each other, and the main deck is arranged vertically between the outer plate and the inner longitudinal wall plate; before the inner longitudinal wall plate middle assembly and the outer plate middle assembly are combined, Precision control plates are installed on the middle assembly of the plate and the inner longitudinal wall plate, and the precision control plates are respectively welded vertically and fixed on the middle assembly of the outer plate and the inner longitudinal wall plate; through holes are provided on the precision control plates corresponding to the torsion box ribs, and the torsion box ribs pass through the through holes. After the middle assembly of the inner longitudinal wall plate and the middle assembly of the outer plate are closed, connectors are connected between the precision control plates assembled in the middle of the outer plate and the precision control plates on the inner longitudinal wall plate, and the two ends of the connectors are respectively fixedly connected to the precision control plates assembled in the middle of the outer plate and the precision control plates on the inner longitudinal wall plate; the precision control plates and connectors are removed when the torsion box is assembled in sections.

[0008] Furthermore, the precision control plate is provided with welding holes at positions corresponding to the thickness differences of the inner longitudinal wall panels.

[0009] Furthermore, the precision control panel is divided into several blocks, and the precision control panel is installed on the outer panel and the inner longitudinal wall panel in sections during installation.

[0010] Furthermore, the joint positions between each section of the precision control panel are staggered with the joint positions of the panels on the outer panel, and the joint positions between each section of the precision control panel are staggered with the joint positions of the panels on the inner longitudinal wall panel.

[0011] Furthermore, the precision control panel joints are staggered 300-500mm from the panel joints on the outer panels, and the precision control panel joints are staggered 300-500mm from the panel joints on the inner longitudinal wall panels.

[0012] Furthermore, a plurality of lightening holes are provided on the precision control plate.

[0013] Furthermore, after the connectors are installed, outfitting parts and tube bundle units are installed between the inner longitudinal wall plate and the outer plate.

[0014] The present invention also provides a torsion box for an ultra-large container ship, comprising an outer plate central assembly and an inner longitudinal wall plate central assembly, which is constructed according to the above-mentioned method for precision control of the torsion box for an ultra-large container ship.

[0015] Compared with the prior art, the beneficial effect of the present invention is that, by arranging a precision control plate between the outer plate and the inner longitudinal wall plate, the present invention can effectively control the precision of the torsion box, thereby solving the problem that the torsion box has a weak structure and is easy to deform along the length of the ship. The setting of the lightening holes on the precision control plate facilitates the installation of the tube bundle unit and the outfitting parts, and reduces the interference with the tube bundle unit and the outfitting parts during the precision control process. At the same time, the precision control plate is universal and can be reused repeatedly, thereby reducing costs and production time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the segmented structure of the torsion box in the present invention.

[0017] Figure 2 It is a schematic diagram of the assembly and installation of the precision control panel in the inner longitudinal wall panel of the present invention.

[0018] Figure 3 It is a schematic diagram of the installation of the precision control board assembled in the outer panel in the present invention.

[0019] Figure 4 It is a structural diagram of the precision control board in the present invention.

[0020] Figure 5 It is a schematic diagram of the installation of the precision control board in the present invention.

[0021] Figure 6 It is a schematic diagram of the installation of outfitting parts and tube bundle units in the present invention.

[0022] In the figure, 1. main deck; 2. inner longitudinal wall plate; 3. outer plate; 4. precision control plate; 5. connector; 6. torsion box rib; 7. tube bundle unit; 8. outfitting; 21. first row inner longitudinal wall plate; 22. second row inner longitudinal wall plate; 23. third row inner longitudinal wall plate; 31. first row outer plate; 32. second row outer plate; 33. third row outer plate; 41. lightening hole; 42. through hole; 43. through-weld hole. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below in conjunction with specific embodiments:

[0024] A method for precision control of a torsion box of an ultra-large container ship is disclosed. The torsion box structure includes an inner longitudinal wall plate, a main deck, an outer plate, torsion box ribs, a tube bundle unit, outfitting parts, etc. The main deck is vertically arranged between the inner longitudinal wall plate and the outer plate, the torsion box ribs are installed on the inner longitudinal wall plate and the outer plate, and the tube bundle unit and outfitting parts are installed between the inner longitudinal wall plate and the outer plate.

[0025] During construction, the outer panel is used as the base surface to build the outer panel middle assembly, and the inner longitudinal wall panel is used as the base surface to build the inner longitudinal wall panel middle assembly, such as Figure 1As shown, the inner longitudinal wall plate assembly includes a main deck 1 and an inner longitudinal wall plate 2. The main deck 1 is EH40 crack arrest steel with a thickness of 90 mm, which is vertically welded to the inner longitudinal wall plate 2. The outer plate 3 is welded by the first row of 75 mm outer plates 31, the second row of 38 mm outer plates 32 and the third row of 19 mm outer plates 33. The inner longitudinal wall plate 2 is welded by the first row of 75 mm inner longitudinal wall plates 21, the second row of 38 mm inner longitudinal wall plates 22 and the third row of 19 mm inner longitudinal wall plates 23.

[0026] After the outer panel middle assembly and the inner longitudinal wall panel middle assembly are completed, the precision control board 4 is installed on the outer panel middle assembly and the inner longitudinal wall panel respectively. Figure 2 and Figure 3 As shown, the precision control plate 4 is vertically welded to the outer plate 3 and the inner longitudinal wall plate 2. The precision control plate 4 has through-holes 42 corresponding to the torsion box ribs 6, through which the torsion box ribs 6 pass. The precision control plate 4 also has several lightening holes 41, which not only reduce weight but also facilitate the subsequent installation of the tube bundle unit 7 and outfitting 8.

[0027] like Figure 4-5 As shown, since the thickness difference of the inner longitudinal wall panel is reflected on the inner side of the torsion box, the precision control plate is provided with a through-welding hole 43 at the position corresponding to the thickness difference of the inner longitudinal wall panel, and the thickness difference of the outer panel is reflected on the outer side of the torsion box, so there is no need to set a through-welding hole on the precision control plate on the outer panel.

[0028] To facilitate installation of the precision control panels, they are divided into several sections. In this embodiment, the precision control panels on the outer panels and the inner longitudinal wall panels are each divided into three sections, and then installed in sections. During installation, the seams between each section of the precision control panel are staggered by 300-500mm from the seams between the panels on the outer panels, and the seams between each section of the precision control panel are staggered by 300-500mm from the seams between the panels on the inner longitudinal wall panels.

[0029] In this embodiment, the precision control plate is close to the side of the first row of inner longitudinal wall panels 21. Since the first row of inner longitudinal wall panels 21 are thicker, the welding of the precision control plate 4 and the first row of inner longitudinal wall panels 21 can be reduced. To ensure that the precision control plate spans the joint between the first row of inner longitudinal wall panels 21 and the second row of inner longitudinal wall panels 22, the end of the precision control plate 4 can be welded to the torsion box rib 6 on the first row of inner longitudinal wall panels 21 instead of being directly welded to the first row of inner longitudinal wall panels 21.

[0030] The precision control plate is close to the side of the first row outer plate 31. Since the first row outer plate 31 is thicker, the welding of the precision control plate 4 and the first row outer plate 31 can be reduced. To ensure that the precision control plate spans the joint between the first row outer plate 31 and the second row outer plate 32, the end of the precision control plate 4 can be welded to the torsion box rib 6 on the first row outer plate 31 instead of directly welding to the first row outer plate 31. Figure 5 shown.

[0031] After the precision control plate is welded, the outer plate middle assembly is used as the base surface, and the inner longitudinal wall plate middle assembly is turned 180 degrees and assembled on the outer plate middle assembly to form a torsion box segment. The outer plate and the inner longitudinal wall plate are arranged parallel to each other up and down. Connectors 5 are connected between the precision control plate assembled in the outer plate and the precision control plate on the inner longitudinal wall plate. The connectors 5 are made of channel steel, and the two ends of the connectors 5 are fixedly connected to the precision control plate 4 assembled in the outer plate and the precision control plate 4 on the inner longitudinal wall plate respectively; when the torsion box is assembled, the precision control plate 4 and connectors 5 are removed. After the connectors are installed, the outfitting parts 8 and the tube bundle unit 7 are installed between the inner longitudinal wall plate 2 and the outer plate 3, as shown in FIG. Figure 6 shown.

[0032] During the outfitting and installation phase of the torsion box, the sandblasting and painting phase, and the transportation phase, the precision control panels and connectors are not removed. During the general assembly phase, the precision control panels and connectors are removed, and the removed areas are polished and repainted.

[0033] This embodiment is only a further explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A method for precision control of torsion box of ultra-large container ship, characterized in that: When the torsion box is constructed in sections, the outer plate middle assembly and the inner longitudinal wall plate middle assembly are constructed respectively. The inner longitudinal wall plate middle assembly includes a main deck and an inner longitudinal wall plate that are perpendicular to each other, and the outer plate middle assembly includes an outer plate. The outer plate and the inner longitudinal wall plate are respectively made of plates of different thicknesses. The inner longitudinal wall plate middle assembly and the outer plate middle assembly are combined to form a torsion box section. The outer plate and the inner longitudinal wall plate are arranged parallel to each other, and the main deck is vertically arranged between the outer plate and the inner longitudinal wall plate. Before the inner longitudinal wall plate middle assembly and the outer plate middle assembly are combined, the outer plate middle assembly and the inner longitudinal wall plate are respectively A precision control plate is installed on the wall panel, and the precision control plate is vertically welded and fixed on the outer panel assembly and the inner longitudinal wall panel respectively; a through hole is provided on the precision control plate corresponding to the torsion box rib, and the torsion box rib passes through the through hole, and after the inner longitudinal wall panel assembly and the outer panel assembly are closed, a connecting piece is connected between the precision control plate assembled in the outer panel and the precision control plate on the inner longitudinal wall panel, and the two ends of the connecting piece are fixedly connected to the precision control plate assembled in the outer panel and the precision control plate on the inner longitudinal wall panel respectively; the precision control plate and the connecting piece are removed when the torsion box is assembled in sections.

2. The method for precision control of torsion box of ultra-large container ship according to claim 1, characterized in that: The precision control plate is provided with welding holes at positions corresponding to the thickness differences of the inner longitudinal wall panels.

3. The method for precision control of torsion box of ultra-large container ship according to claim 1, characterized in that: The precision control panel is divided into several blocks, and the precision control panel is installed on the outer panel and the inner longitudinal wall panel in sections during installation.

4. The method for precision control of torsion box of ultra-large container ship according to claim 3, characterized in that: The joint positions between each section of the precision control plate are staggered with the joint positions of the panels on the outer plate, and the joint positions between each section of the precision control plate are staggered with the joint positions of the panels on the inner longitudinal wall plate.

5. The method for precision control of torsion box of ultra-large container ship according to claim 4, characterized in that: The joints on the precision control panel are staggered by 300-500mm from the panel joints on the outer panel, and the joints on the precision control panel are staggered by 300-500mm from the panel joints on the inner longitudinal wall panel.

6. The method for precision control of torsion box of ultra-large container ship according to claim 1, characterized in that: The precision control plate is also provided with a plurality of lightening holes.

7. The method for precision control of torsion box of ultra-large container ship according to claim 1, characterized in that: After the connection parts are installed, the outfitting parts and tube bundle units are installed between the inner longitudinal wall plate and the outer plate.

8. A torsion box for an ultra-large container ship, characterized in that: The utility model comprises an outer panel mid-assembly and an inner longitudinal wall panel mid-assembly, and is constructed according to the method according to any one of claims 1 to 7.

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