Longitudinal wall grooving design method

Abstract

The invention provides a longitudinal wall grooving design method, which takes a hexahedral box body formed by attaching to a longitudinal wall plate of a ship body as an example, and comprises the following steps: by taking a longitudinal wall as a base surface, firstly fixing to complete welding, and then fixedly welding a top plate with the lower end of the longitudinal wall; the side wall is fixedly welded with the upper end of the top plate; the upper and lower ends of the first transverse wall are fixedly welded with the longitudinal wall and the side wall; the left end of the first transverse wall is fixedly welded with the top plate; the upper and lower ends of the second transverse wall are fixedly welded with the longitudinal wall and the side wall; the left end of the second transverse wall is fixedly welded with the top plate; the upper end and the lower end of the bottom plate are fixedly welded to the longitudinal wall and the side wall, and the left end and the right end are fixedly welded to the first transverse wall and the second transverse wall respectively. The opening design form effectively solves the problem of water accumulation on the surface of the box body, reduces the site construction difficulty, and prolongs the service life of the fire box.

Description

Technical Field

[0001] The present invention belongs to the technical field of ship electrical installation, and particularly relates to a method for designing a groove dug in a longitudinal bulkhead. Background Art

[0002] During the ship design process, several fire boxes are usually set up for safety considerations. Currently, based on the requirements of aesthetics and integrated structure design, the boxes are usually designed according to the outfitting layout position and structure. Traditional welding methods generally require leaving enough fillet welding positions.

[0003] Such boxes are usually arranged on the longitudinal bulkhead, and grooves need to be dug on the longitudinal bulkhead and then enclosed into a small box. Traditional ordinary fillet welds generally have openings protruding from the bottom plate. In the garage area, various vehicles are often washed, resulting in water accumulation on the surface area of the fire box, corroding the structure and affecting the service life of the fire box. Summary of the Invention

[0004] In order to solve the technical problems in the prior art, the present invention provides a method for designing a groove dug in a longitudinal bulkhead. Taking a hexahedron box formed by attaching to the longitudinal bulkhead plate of the hull as an example, the method includes the following steps:

[0005] Taking the longitudinal bulkhead as the base surface, first complete the welding, and then fixedly weld the lower end of the top plate to the longitudinal bulkhead;

[0006] Fixedly weld the upper end of the side wall to the top plate;

[0007] Fixedly weld the upper and lower ends of the first transverse wall to the longitudinal bulkhead and the side wall, and fixedly weld the left end of the first transverse wall to the top plate;

[0008] Fixedly weld the upper and lower ends of the second transverse wall to the longitudinal bulkhead and the side wall, and fixedly weld the left end of the second transverse wall to the top plate;

[0009] Fixedly weld the upper and lower ends of the bottom plate to the longitudinal bulkhead and the side wall, and fixedly weld the left and right ends to the first transverse wall and the second transverse wall respectively.

[0010] Further, the plate thickness h of the longitudinal bulkhead is determined by the hull structure body. Since the longitudinal bulkhead is affected by the box and large holes need to be opened, weakening the original strength of the hull structure, in order to ensure the original structural strength and cross-sectional area of the longitudinal bulkhead plate of the hull, the plate thickness of the other five plates of the box is also set to h.

[0011] Further, the length and width of the longitudinal bulkhead are determined by the hull structure body and need to be greater than the length and width of the box;

[0012] Assume that the length of the box body is L = a, the width is B = b, and the height is H = c. Then the length of the side wall 2 is L2 = c, and the width B2 = a + 30; the length of the top plate 3 is L3 = a + 30, and the width B3 = b + 15; the length of the bottom plate 4 is L4 = a, and the width B4 = b; the length of the transverse wall 5 is L5 = c, and the width B5 = b; the length of the transverse wall 6 is L6 = c, and the width B6 = b.

[0013] The length of the opening on the longitudinal wall plate is L0 = a - 30, the opening width B0 = c - 30, the rounding is a fixed value R100, and a small groove for the node is dug at the center position of the lower edge of the hole.

[0014] Furthermore, an opening is made on the longitudinal wall, and a fillet weld position of 15 mm is left between the hole edge and the surrounding structure of the box body.

[0015] Furthermore, the radius of the fillet around the opening is 100 mm.

[0016] Furthermore, an unclosed area is formed between the lower edge of the opening and the bottom plate at a position 50 mm before and after the center of the hole, which is flush with the bottom plate 4 to allow drainage, and a deep penetration weld groove is opened in the range of 100 mm here.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] The opening design form of the present invention effectively solves the problem of water accumulation on the surface area of the box body, reduces the on-site construction difficulty, and improves the service life of the fire box. Brief Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is Figure 1 the schematic diagram of A-A in

[0021] Figure 3 is Figure 1 the enlarged schematic diagram of node 1 in

[0022] Figure 4 is Figure 2 the enlarged schematic diagram of node 2 in Detailed Description of the Invention

[0023] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described below in conjunction with the drawings and specific embodiments.

[0024] The ship is composed of staggered welding of decks, transverse rib plates and longitudinal wall plates. Various box bodies in the outfitting specialty are usually attached to the longitudinal wall plate 1 of the hull to form a hexahedron box body. Refer to Figures 1-4, taking the hexahedron box composed of the longitudinal wall plate 1 of the hull, the side wall 2 of the box, the top plate 3 of the box, the bottom plate 4 of the box, and the transverse side walls 5 and 6 of the box as an example, this embodiment proposes a longitudinal wall grooving design method, which includes the following steps:

[0025] Taking the longitudinal wall 1 as the base surface of this box, first complete the welding and fix it, and then fixedly weld the lower end of the top plate 3 to the longitudinal wall 1;

[0026] Fix and weld the upper end of the side wall 2 to the top plate 3;

[0027] The upper and lower ends of the transverse wall 5 are fixedly welded to the longitudinal wall 1 and the side wall 2, and the left end is fixedly welded to the top plate 3;

[0028] The upper and lower ends of the transverse wall 6 are fixedly welded to the longitudinal wall 1 and the side wall 2, and the left end is fixedly welded to the top plate 3;

[0029] Finally, the upper and lower ends of the bottom plate 4 are fixedly welded to the longitudinal wall 1 and the side wall 2, and the left and right ends are respectively fixedly welded to the transverse wall 5 and the transverse wall 6.

[0030] The plate thickness h of the longitudinal wall plate 1 is determined by the hull structure body. Since the longitudinal wall 1 is affected by the box and large holes need to be opened, which weakens the original strength of the hull structure. In order to ensure the original structural strength and cross-sectional area of the longitudinal wall plate 1 of the hull, the plate thicknesses of the other 5 plates are usually also set to h (unit: millimeter).

[0031] The length and width of the longitudinal wall plate 1 are also determined by the hull structure body and are usually large enough to be greater than the length and width of the box. Suppose the length of the box is L = a, the width is B = b, and the height is H = c. Then the length of the side wall 2 is L2 = c, and the width B2 = a + 30; the length of the top plate 3 is L3 = a + 30, and the width B3 = b + 15; the length of the bottom plate 4 is L4 = a, and the width B4 = b; the length of the transverse wall 5 is L5 = c, and the width B5 = b; the length of the transverse wall 6 is L6 = c, and the width B6 = b. The opening length L0 of the longitudinal wall plate 1 is a - 30, the opening width B0 is c - 30, the fillet is a fixed value R100, and a small groove at the node 1 (see Figure 3 ) is dug at the center position of the lower edge of the hole. The units of the above-mentioned values are all millimeters.

[0032] Open a hole on the longitudinal wall plate 1, leave a 15-mm fillet position around the hole edge from the surrounding structure of the box, the fillet radius around the hole is 100, and an unclosed area is formed at the position 50 mm before and after the hole center between the lower edge of the hole and the bottom plate, which is flush with the bottom plate 4 to leave for drainage. A deep penetration welding groove is opened in the 100-mm range here, and it is ground flat during on-site welding.

[0033] Compared with the traditional conventional opening, the innovation of this longitudinal wall grooving and opening lies in the newly invented form of longitudinal wall opening, which forms an unclosed space within the range of 100 mm at the lower edge of the hole, flush with the bottom plate 4. When the garage deck is flushed to wash vehicles, the accumulated water formed on the surface of the box can be discharged in time. Here, the preferred opening length is 100 mm. When the opening length is less than 100 mm, it is not conducive to the timely discharge of accumulated water. When the opening length is greater than 100 mm, first, it affects the overall stress intensity of the opening of the longitudinal wall 1; second, it affects the aesthetics of the entire box. Therefore, on the premise of meeting the use function, grooving 100 mm at the lower edge of the opening can not only discharge the accumulated water when the ship washes vehicles in the garage in time, but also ensure the overall aesthetics of the box; the on-site construction difficulty and welding cost are not increased either.

[0034] In summary, this is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention. All equivalent changes and modifications made according to the scope of the present invention patent and the content of the specification are within the scope covered by the present invention patent.

Claims

1. A longitudinal wall groove design method, taking a hexahedral box formed by attaching to the longitudinal wall plate of the hull as an example, characterized in that: The following steps are involved: Taking the longitudinal wall as the base surface, fix and weld it first, then fix and weld the top plate and the lower end of the longitudinal wall; The side wall and the upper end of the top plate are fixedly welded; The upper and lower ends of the first transverse wall are fixedly welded to the longitudinal wall and the side wall, and the left end of the first transverse wall is fixedly welded to the top plate; The upper and lower ends of the second transverse wall are fixedly welded to the longitudinal wall and the side wall, and the left end of the second transverse wall is fixedly welded to the top plate; The upper and lower ends of the bottom plate are fixedly welded to the longitudinal wall and the side wall, and the left and right ends are fixedly welded to the first transverse wall and the second transverse wall respectively.

2. The method according to claim 1, characterized in that: The thickness h of the longitudinal wall is determined by the hull structure. Since the longitudinal wall is affected by the box body, large holes need to be opened, which weakens the original strength of the hull structure. In order to ensure the original structural strength and cross-sectional area of ​​the hull longitudinal wall plate, the thickness of the other five plates of the box body is also set to h.

3. The method according to claim 1, characterized in that: The length and width of the longitudinal wall are determined by the hull structure and need to be greater than the length and width of the box; Assuming that the length of the box is L = a, the width is B = b, and the height is H = c, then the length of the side wall 2 is L2 = c, and the width is B2 = a + 30; the length of the top plate 3 is L3 = a + 30, and the width is B3 = b + 15; the length of the bottom plate 4 is L4 = a, and the width is B4 = b; the length of the transverse wall 5 is L5 = c, and the width is B5 = b; the length of the transverse wall 6 is L6 = c, and the width is B6 = b; The length of the opening in the longitudinal wall panel is L0=a-30, the width of the opening is B0=c-30, the chamfer is a constant value R100, and a small groove of the node is dug out at the center position of the lower edge of the hole.

4. The method according to claim 3, characterized in that: Drill a hole in the longitudinal wall, leaving a 15mm welding leg position from the hole edge to the surrounding structure of the box.

5. The method according to claim 4, characterized in that: The fillet radius around the opening is 100mm.

6. The method according to claim 5, characterized in that: The lower edge of the opening and the bottom plate form an unclosed area 50mm before and after the center of the hole, flush with the bottom plate 4, leaving space for drainage, and a deep fusion welding groove is opened here within a range of 100mm.

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