A ship bow structure and a manufacturing method thereof

Abstract

The present invention discloses a ship bow structure and a manufacturing method thereof, relating to the technical field of shipbuilding. The ship bow structure includes a hollow frame member, which is enclosed by a left outer plate, a right outer plate, a rear transverse bulkhead plate, an upper sealing plate, and a lower sealing plate; and longitudinal stiffeners, which are clamped between the left outer plate and the right outer plate. The front side edge of the left outer plate is welded to the left end face of the longitudinal stiffener, and the front side edge of the right outer plate is welded to the right end face of the longitudinal stiffener. The upper sealing plate and the lower sealing plate are both provided with grooves for inserting the longitudinal stiffeners. The ship bow structure of the embodiment of the present invention can replace the solid cast steel part structure. On the one hand, it reduces the weight of the ship bow structure, saves steel materials and raw material costs; and there is no need to contract out for casting, so the manufacturing cost is reduced; secondly, the manufacturing cycle is shortened and the construction process is controllable.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a ship bow structure, and also relates to a manufacturing method of a ship bow structure. Background Art

[0002] In the process of implementing the present invention, the inventors found that there are at least the following problems in the prior art: the global economy is in a downturn, and the shipping market continues to slump. The shipbuilding market is also at a low ebb, and ship prices have been hovering at a low level. In order to obtain limited orders, shipbuilding enterprises of all sizes have adopted various methods to compete. Improving the economic performance of ships and reducing the operating costs of ships are one of the most common and effective means. Reducing the shipbuilding cost and achieving profitability by accepting ships at a low price are the second effective means. For the former, by optimizing the hull lines at the bow and stern of the ship to reduce the ship resistance, it is possible to reduce the main engine power and fuel consumption at the same ship speed, thereby achieving the purpose of improving the economic performance. For the latter, by adopting new design methods and construction techniques in the ship design and construction process, the manufacturing cost can be reduced.

[0003] In the position where the hull line of the ship bow is slender, the conventional design is to adopt a solid structure of cast steel parts. After optimizing the hull lines at the bow and stern, the hull line becomes more slender within a quite large range in the middle of the bow. If a steel plate welding structure is adopted, the welding space is too small, so a solid cast steel part structure is adopted to avoid the problem of difficult internal welding. Due to the large narrow space range, it directly leads to a large increase in the shape of the bow cast steel part. Usually, the length is about three meters, and the height will exceed four meters. Such a large-shaped solid cast steel part is also relatively heavy, and the manufacturing cost will be relatively high. The larger the cast steel part, the more expensive it is, and the price and weight do not increase linearly. Instead, as the weight increases, the unit price also increases. This is because the larger the shape and weight of the cast steel part, the greater the manufacturing difficulty. The deformation amount during the manufacturing process is large, the accuracy is difficult to control, the processing and manufacturing are difficult, and the manufacturing cycle becomes very long. The bow structure is an important part of the bow section of the ship. A long manufacturing cycle of the bow structure will lead to a corresponding increase in the construction cycle of the bow section, and further affect the efficiency of the assembly of all sections of the ship on the shipbuilding berth. Summary of the Invention

[0004] The present invention aims to solve at least one of the above technical problems in the prior art to some extent. To this end, an embodiment of the present invention provides a ship bow structure, which reduces the influence of the narrow welding space on the welding quality, thereby eliminating the bow cast steel part, reducing the manufacturing cost, shortening the construction period, and improving the work efficiency.

[0005] An embodiment of the present invention also provides a manufacturing method of a ship bow structure.

[0006] According to an embodiment of the first aspect of the present invention, a ship bow structure is provided, which includes a hollow frame member enclosed by a left outer plate, a right outer plate, a rear transverse bulkhead plate, an upper closing plate, and a lower closing plate; and longitudinal stiffeners sandwiched between the left outer plate and the right outer plate, with the front side edge of the left outer plate welded to the left end face of the longitudinal stiffener, the front side edge of the right outer plate welded to the right end face of the longitudinal stiffener, and grooves for inserting the longitudinal stiffeners are provided on both the upper closing plate and the lower closing plate.

[0007] According to an embodiment of the first aspect of the present invention, at least one strengthening member is arranged inside the frame member. The strengthening member includes a platform plate and a first connecting stiffener. The platform plate has a left side edge, a right side edge, and a rear side edge. The first connecting stiffener is installed on the right side edge of the platform plate. The left side edge of the platform plate is welded and fixed to the left outer plate, the rear side edge of the platform plate is welded and fixed to the rear transverse bulkhead plate. The outer end face of the first connecting stiffener faces the right outer plate, and the right outer plate is divided into several spliced outer plates at the corresponding position of the first connecting stiffener, and the transverse side edges of the spliced outer plates are welded and fixed to the first connecting stiffener.

[0008] According to an embodiment of the first aspect of the present invention, the platform plate is provided with a groove for inserting the longitudinal stiffener.

[0009] According to an embodiment of the first aspect of the present invention, a second connecting stiffener is installed on the right side edge of the rear transverse bulkhead plate, and the rear side edge of the right outer plate is welded and fixed to the second connecting stiffener.

[0010] According to an embodiment of the first aspect of the present invention, welding backing plates are installed on both the upper closing plate and the lower closing plate.

[0011] According to an embodiment of the second aspect of the present invention, a method for manufacturing a ship bow structure is provided, which includes the following steps: taking the left outer plate as the base surface of the jig, installing the upper closing plate, the lower closing plate, the rear transverse bulkhead plate, and the longitudinal stiffeners on the inner side of the left outer plate; then installing the right outer plate, and welding and fixing the right outer plate to the upper closing plate, the lower closing plate, the rear transverse bulkhead plate, and the longitudinal stiffeners respectively, so as to form the ship bow structure.

[0012] According to an embodiment of the second aspect of the present invention, the following steps are included: S1, taking the left outer plate as the fitter base surface, installing the strengthening member, the upper sealing plate and the lower sealing plate on the inner side surface of the left outer plate. The cross-section of the strengthening member is in a T shape, and the strengthening member includes a platform plate and a first connecting rib plate; S2, installing the longitudinal rib plate and the rear transverse bulkhead plate on the inner side surface of the left outer plate, and a second connecting rib plate is installed on the right side edge of the rear transverse bulkhead plate; S3, installing the right outer plate. The right outer plate includes a plurality of spliced outer plates. Each spliced outer plate relies on the corresponding first connecting rib plate, and the spliced outer plates are spliced externally, so that the right outer plate is welded and fixed to the strengthening member, and the right outer plate is welded to the second connecting rib plate on the right side edge of the rear transverse bulkhead plate; S4, welding the longitudinal rib plate 26 to the left outer plate 21 and the right outer plate 22 respectively.

[0013] According to an embodiment of the second aspect of the present invention, the strengthening member is prefabricated, and the first connecting rib plate is welded to the right front side edge of the platform plate; the second connecting rib plate is pre-welded to the right side edge of the rear transverse bulkhead plate.

[0014] According to an embodiment of the second aspect of the present invention, the platform plate and the left outer plate are welded on both sides, and the rear transverse bulkhead plate and the left outer plate are welded on both sides; grooves for inserting the longitudinal rib plate are provided on the upper sealing plate, the lower sealing plate and each platform plate. At the grooves where the longitudinal rib plate contacts the upper sealing plate, the lower sealing plate and each platform plate, welding is performed on three sides on both sides.

[0015] According to an embodiment of the second aspect of the present invention, the welds between the longitudinal rib plate and the left outer plate and the welds between the longitudinal rib plate and the right outer plate are all welded externally on one side.

[0016] Based on the above technical solutions, the embodiments of the present invention have at least the following beneficial effects: By designing a hollow frame member, the longitudinal rib plate serves as a welded connection body for the left outer plate and the right outer plate; in addition, strengthening members are arranged inside the frame member. The right outer plate is divided into a plurality of spliced outer plates at the first connecting rib plate. Each spliced outer plate relies on the corresponding first connecting rib plate, is spliced externally and fixed to the first connecting rib plate. By transferring part of the welding operation to external welding, welding can be achieved at the position where the ship bow column has a slender shape and the welding quality can be guaranteed. The ship bow column structure of the embodiments of the present invention can replace the solid cast steel part structure. On the one hand, the weight of the ship bow column structure is reduced, and there is no need to subcontract casting, reducing the manufacturing cost; secondly, the manufacturing cycle is shortened and the construction process is controllable. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly describe the drawings required for the description of the embodiments. Obviously, the described drawings are only a part of the embodiments of the present invention, rather than all the embodiments. Without creative efforts, those skilled in the art can also obtain other design solutions and drawings based on these drawings.

[0018] Figure 1 is the longitudinal sectional view of the bow line and the waterline diagram;

[0019] Figure 2 is the transverse sectional view of the bow line;

[0020] Figure 3 is the front view of the developed drawing of the outer plate of the bow of the prior art;

[0021] Figure 4 is the transverse sectional view of the developed outer plate of the bow of the prior art;

[0022] Figure 5 is the longitudinal sectional view of the middle of the bow of the prior art;

[0023] Figure 6 is Figure 5 the transverse sectional view at the middle rib position FR219;

[0024] Figure 7 is Figure 5 the transverse sectional view at the middle rib position FR220;

[0025] Figure 8 is Figure 5 the sectional plan view of each waterline in;

[0026] Figure 9 is the perspective view of the embodiment of the present invention, with the right outer plate not shown;

[0027] Figure 10 is the longitudinal sectional view of the bow for installing the embodiment of the present invention;

[0028] Figure 11 is Figure 10 the transverse sectional view at the middle rib position FR219;

[0029] Figure 12 is Figure 10 the transverse sectional view at the middle rib position FR220;

[0030] Figure 13 is Figure 11 the partial enlarged view of the G cloud coil in;

[0031] Figure 14 is Figure 10 the sectional plan view of each waterline in;

[0032] Figure 15 is Figure 14 a partial enlarged view of the C circle in;

[0033] Figure 16 is Figure 14 a partial enlarged view of the D circle in;

[0034] Figure 17 the front view from the starboard perspective of the expanded view of the bow outer plate for implementing this embodiment of the present invention;

[0035] Figure 18 is Figure 17 a partial enlarged view of the E circle in;

[0036] Figure 19 is Figure 18 a sectional view taken along the F-F direction in. Detailed Embodiment

[0037] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention. However, it should not be construed as a limitation on the protection scope of the present invention.

[0038] In the description of the present invention, it should be understood that for the orientation description, terms such as "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present invention. In addition, if there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence of the indicated technical features.

[0039] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is two or more, "greater than", "less than", "exceeding", etc. are understood as not including the number itself, and "above", "below", "within", etc. are understood as including the number itself, unless otherwise specifically and clearly defined.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as "arranged", "positioned", "installed", "connected", "linked", "fixed", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0041] In the description of the present invention, unless otherwise clearly defined, when the first feature is "above" or "below" the second feature, it may be that the first feature is in direct contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, when the first feature is "above" or "over" or "on" the second feature, it may be that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. When the first feature is "below" or "beneath" or "under" the second feature, it may be that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0042] Refer to Figure 1 and Figure 2 The line graph of the ship's bow of this embodiment is presented, where Figure 1 is an overlapping view of the longitudinal section and the waterline view of the bow line, and the right figure is the cross-sectional view of the bow line. Among them, Figure 1 and Figure 2 The part circled by the cloud line in is the stem part. It can be seen from the figure that in the height range of 4 meters from the WL8500 waterline to the WL12500 waterline, and in the length range of nearly 3 meters from the frame position FR218 to the ship's bow, the widest part of the ship's width is 451×2 = 902mm, and the narrowest part is 250×2 = 500mm. The space in this part is very narrow.

[0043] Considering avoiding the complexity of welding inside the narrow space and the difficulty of quality control, the existing design is a solid cast steel structure 10. As Figure 3 and Figure 4 shown, by making the stem structure into a solid cast steel structure 10, the internal welding problems can be avoided, and at the same time, the welding of the remaining peripheral structures can be carried out in a relatively open space. Figures 5 to 8 is the specific structural form diagram of the cast steel structure 10, Figure 5 is the longitudinal mid-section of the solid cast steel structure 10, Figure 8 is the sectional plan view of each waterline, Figure 6 and Figure 7 are the cross-sectional views of the frame positions FR219 and FR220 respectively. Figures 5 to 8 The shaded part of is the solid cast steel structure 10. It can be seen from these figures the position, size and connection form of the solid cast steel structure 10 with the peripheral structures. From these sections, especially Figure 8It can be further seen that it is impossible to weld the solid area, especially the sharp corner position at the very front of the stem structure, with the conventional platform steel plate inside and the outer plate. If cost and production cycle are not considered, using a solid cast steel structure to avoid internal welding is a direct and effective method. However, if cost and cycle are considered, the design of a solid cast steel structure is not a good strategy.

[0044] The stem structure of the ship in this embodiment maintains the same outer contour, size and position as the original solid cast steel structure 10, but changes the solid cast steel structure into a hollow steel plate three-dimensional frame structure form. It should be noted that the "up", "down", "front", "back", "left" and "right" mentioned in the present invention can be understood with reference to Figure 9 the orientation shown. Those skilled in the art can understand the orientation change of the structure. Therefore, it cannot be understood as a limitation to the present invention.

[0045] Referring to Figure 1 、 Figure 2 and Figures 9 to 19 , a ship stem structure includes frame members and longitudinal stiffeners 26. The frame members are hollow and are enclosed by a left outer plate 21, a right outer plate 22, a rear transverse bulkhead plate 23, an upper closing plate 24 and a lower closing plate 25. Among them, the longitudinal stiffeners 26 are sandwiched between the left outer plate 21 and the right outer plate 22. The front side of the left outer plate 21 is welded to the left end face of the longitudinal stiffener 26, and the front side of the right outer plate 22 is welded to the right end face of the longitudinal stiffener 26.

[0046] In addition, preferably, at least one strengthening member is arranged inside the frame member. In this embodiment, a total of six strengthening members are arranged. Specifically, each strengthening member includes a platform plate 31 and a first connecting rib plate 32. The platform plate 31 has a left side, a right side and a rear side. The first connecting rib plate 32 is installed on the right side of the platform plate 31. The left side of the platform plate 31 is welded and fixed to the left outer plate 21, the rear side of the platform plate 31 is welded and fixed to the rear transverse bulkhead plate 23. The outer end face of the first connecting rib plate 32 faces the right outer plate 22, and the right outer plate 22 is divided into several spliced outer plates 221 at the corresponding positions of the first connecting rib plate 32. The transverse side of the spliced outer plate 221 is welded and fixed to the first connecting rib plate 32.

[0047] As Figure 15 and Figure 16As shown, it can be understood that the front side edge of the left outer plate 21 is welded to the left end face of the longitudinal rib plate 26, and the front side edge of the right outer plate 22 is welded to the right end face of the longitudinal rib plate 26. By setting the longitudinal rib plate 26, the longitudinal rib plate 26 serves as the welding connection body between the left outer plate 21 and the right outer plate 22. That is, after changing the solid cast steel structure into a hollow frame structure, the outer plate is disconnected at the longitudinal center and divided into the left outer plate 21 and the right outer plate 22, and the welds between the longitudinal rib plate 26 and the left outer plate 21 and between the longitudinal rib plate 26 and the right outer plate 22 are all welded externally. And the longitudinal rib plate 26 can strengthen the strength of the box-shaped frame structure.

[0048] In addition, in this embodiment, since the linear change of the left outer plate 21 is too large, it is divided into two plates for processing, and internal bevels are opened on these two plates for the internal components. In this embodiment, a total of six strengthening components are provided, and the right outer plate 22 is correspondingly divided into seven spliced outer plates 221, as Figure 13 shown. In addition, in combination with Figures 17 to 19 shown, the adjacent spliced outer plates 221 rely on the corresponding first connecting rib plate 32 and are welded externally in the segmented area. The segmented area can be understood as an open space without components, which not only realizes the splicing of the two spliced outer plates 221 but also welds and fixes the platform plate 31 to the right outer plate 22 through the first connecting rib plate 32.

[0049] As Figure 15 shown, the platform plate 31 is provided with a groove for inserting the longitudinal rib plate 26. As Figure 16 shown, both the upper sealing plate 24 and the lower sealing plate 25 are provided with grooves for inserting the longitudinal rib plate 26. Among them, the three sides of the corresponding grooves where the longitudinal rib plate 26 contacts the upper sealing plate 24, the lower sealing plate 25, and each platform plate 31 are all welded on both sides, and this needs to be carried out before the installation and welding of the spliced outer plates 221.

[0050] Preferably, a second connecting rib plate 231 is installed on the right side edge of the rear transverse bulkhead plate 23, and the rear side edge of the right outer plate 22 is welded and fixed to the second connecting rib plate 231. Further, welding backing plates 251 are installed on both the upper sealing plate 24 and the lower sealing plate 25. Thus, the welding between the right outer plate 22 and each plate is all set externally in the segmented area, thereby realizing welding in a narrow space.

[0051] The triangular columnar solid steel casting structure 10 is changed into a hollow frame structure, which is enclosed by five steel plates, namely the left outer plate 21, the right outer plate 22, the rear transverse bulkhead plate 23, the upper cover plate 24 and the lower cover plate 25, to form a triangular hollow box structure. In this embodiment, the outer shape of this hollow box frame structure is about 2.5 meters long, about 4 meters high, and about 0.9 meters thick at the thickest point. In order to ensure that the structure can withstand the impact of waves during the navigation of the ship, longitudinal ribs 26 are arranged inside, and a horizontal reinforcement member is arranged every 0.5 to 0.6 meters, with a total of six platform plates 31. The specifications and materials of the outer wall of the frame member, the longitudinal ribs, and the platform plate are calculated and determined according to the classification society specifications to ensure that the triangular hollow box frame structure has the same strength as the solid steel casting structure to meet the requirements of resisting wave impact.

[0052] In addition, since the bow section is the bow ballast water tank, the quality of the single-sided weld paint coating is difficult to ensure and is easily corroded by seawater. Therefore, the space between the upper sealing plate 24, the lower sealing plate 25, the platform plate 31 and the rear transverse bulkhead plate 23 is set as a watertight space, and the frame structure box is set as an empty tank structure to ensure that when the outer periphery of the frame structure is soaked in seawater, the interior is not soaked and corroded by seawater, and the frame structure remains effective for a long time.

[0053] The present invention changes the solid steel casting structure into a hollow steel plate frame structure, which greatly saves raw materials for manufacturing. The original solid steel casting structure weighs about 23.0 tons. After changing to a hollow steel plate frame structure, the weight is about 6.5 tons, and the amount of steel used is reduced by 71.7%. The production cost is reduced, and the casting is calculated at the cheapest 15,000 yuan per ton, a total of 345,000 yuan. After changing to a steel plate frame structure, the bow structure no longer needs to be outsourced. Calculated at 5,000 yuan per ton of steel plate and 3,500 yuan in production costs, it is about 55,000 yuan, saving 345,000-55,000 = 290,000 yuan. The bow structure of a ship adopting this structure can save costs. The bow structure of the ship in this embodiment is specifically used in container ships. This technology can also be used in container ships of the same type or other types of ships, and the application prospects are very broad.

[0054] At the same time, the production cycle of the bow section is greatly shortened, and the construction process is controllable. The general cycle of outsourcing castings from providing casting layout drawings to outsourcing manufacturers to completion and delivery is about 4.5 months. If there are unexpected factors causing delays during this period, the cycle will be longer. After changing to a steel plate frame structure, the uncontrollable factors of outsourcing are eliminated, and the bow column production is carried out simultaneously with the bow section production, which saves time for the section production and avoids the problem of the sections stopping and waiting on the cradle due to the delayed delivery of the bow column castings, which speeds up the turnover of the production site and improves work efficiency.

[0055] The embodiment of the present invention also provides a method for manufacturing the above-mentioned ship bow structure.

[0056] Manufacturing method of ship bow structure, including the following steps: taking the left outer plate 21 as the base surface of the jig, installing the upper sealing plate 24, the lower sealing plate 25, the rear transverse bulkhead plate 23 and the longitudinal stiffener 26 on the inner side of the left outer plate 21; then installing the right outer plate 22, and welding and fixing the right outer plate 22 to the upper sealing plate 24, the lower sealing plate 25, the rear transverse bulkhead plate 23 and the longitudinal stiffener 26 respectively, so as to form the ship bow structure.

[0057] Specifically, it includes the following steps:

[0058] S1, taking the left outer plate 21 as the base surface of the jig. Among them, because the line type of the left outer plate 21 changes too much, it is divided into two plates for processing. Inner bevels are opened on these two plates towards the internal components. The splicing of the plates is the prior art and will not be elaborated here.

[0059] Install the strengthening member, the upper sealing plate 24 and the lower sealing plate 25 on the inner side of the left outer plate 21. The platform plate 31 and the left outer plate 21 are welded on both sides, as Figure 9 shown. However, it should be noted that in this embodiment, the left outer plate 21 is used as the base surface of the jig, Figure 9 and the orientation shown is not the actual orientation during manufacturing.

[0060] Among them, the cross-section of the strengthening member is T-shaped. The strengthening member includes the platform plate 31 and the first connecting rib plate 32, which can be understood with reference to Figure 19 and the strengthening member is prefabricated, and the first connecting rib plate 32 is welded to the right side of the platform plate 31.

[0061] S2, install the longitudinal stiffener 26 and the rear transverse bulkhead plate 23 on the inner side of the left outer plate 21, as Figure 9 shown. The rear transverse bulkhead plate 23 and the left outer plate 21 are welded on both sides.

[0062] Among them, a second connecting rib plate 231 is installed on the right side of the rear transverse bulkhead plate 23.

[0063] Grooves for inserting the longitudinal stiffener are opened on the upper sealing plate, the lower sealing plate and each platform plate. At the grooves where the longitudinal stiffener contacts the upper sealing plate 24, the lower sealing plate 25 and each platform plate 31, welding is performed on three sides, as Figure 16 shown.

[0064] S3, install the right outer plate 22. The right outer plate 22 includes several spliced outer plates 221. Each spliced outer plate 221 is supported by the corresponding first connecting rib plate 32, and the spliced outer plates 221 are spliced externally, so that the right outer plate 22 is welded and fixed to the strengthening member, and the right outer plate 22 is welded to the second connecting rib plate 231 on the right side of the rear transverse bulkhead plate 23;

[0065] S4. Weld and fix the longitudinal stiffening plates 26 to the left outer plate 21 and the right outer plate 22 respectively. The welds between the longitudinal stiffening plates 26 and the left outer plate 21 and the welds between the longitudinal stiffening plates 26 and the right outer plate 22 are all welded on the outside in a single-sided manner.

[0066] Further preferably, before step S2, the second connecting stiffening plate 231 is pre-welded to the right side edge of the rear transverse bulkhead plate 23. Before step S3, a total of six strengthening members are arranged in this embodiment. The right outer plate 22 is pre-divided into seven spliced outer plates 221 according to the positions of the first connecting stiffening plates 32 in the strengthening members. The seven spliced outer plates 22 are provided with outer grooves facing away from the respective internal members.

[0067] When manufacturing the bow column structure of this embodiment, it can be constructed together with the bow section. That is, the left outer plate 21 is used as the fitter's bench base surface, and the left outer plate 21 is butt-welded to the other outer plates of the bow section.

[0068] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A ship bow structure, characterized in that: including a hollow frame member, which is enclosed by a left outer plate, a right outer plate, a rear transverse bulkhead plate, an upper sealing plate and a lower sealing plate; and longitudinal stiffeners, which are sandwiched between the left outer plate and the right outer plate. The front side of the left outer plate is welded to the left end face of the longitudinal stiffener, and the front side of the right outer plate is welded to the right end face of the longitudinal stiffener. Grooves for inserting the longitudinal stiffeners are provided on both the upper sealing plate and the lower sealing plate; at least one strengthening member is arranged inside the frame member. The strengthening member includes a platform plate and a first connecting rib plate. The platform plate has a left side, a right side and a rear side. The first connecting rib plate is installed on the right side of the platform plate. The left side of the platform plate is welded and fixed to the left outer plate, and the rear side of the platform plate is welded and fixed to the rear transverse bulkhead plate. The outer end face of the first connecting rib plate faces the right outer plate. The right outer plate is divided into several splicing outer plates at the corresponding position of the first connecting rib plate. The transverse sides of the splicing outer plates are welded and fixed to the first connecting rib plate.

2. The bow structure of a ship according to claim 1, characterized in that: The platform plate is provided with a groove for inserting the longitudinal stiffener.

3. The bow structure of a ship according to any one of claims 1 to 2, characterized in that: A second connecting rib plate is installed on the right side of the rear transverse bulkhead plate, and the rear side of the right outer plate is welded and fixed to the second connecting rib plate.

4. The bow structure of a ship according to claim 1, characterized in that: Welding liners are installed on both the upper sealing plate and the lower sealing plate.

5. A manufacturing method for a ship bow structure, characterized in that including the following steps: S1, taking the left outer plate as the bench surface, installing the strengthening member, the upper sealing plate and the lower sealing plate on the inner side of the left outer plate. The cross-section of the strengthening member is in a T shape, and the strengthening member includes a platform plate and a first connecting rib plate; S2, installing the longitudinal stiffener and the rear transverse bulkhead plate on the inner side of the left outer plate, and a second connecting rib plate is installed on the right side of the rear transverse bulkhead plate; S3, installing the right outer plate. The right outer plate includes several splicing outer plates. Each splicing outer plate is supported by the corresponding first connecting rib plate, and the splicing outer plates are spliced externally, so that the right outer plate is welded and fixed to the strengthening member, and the right outer plate is welded to the second connecting rib plate on the right side of the rear transverse bulkhead plate; S4, welding and fixing the longitudinal stiffener to the left outer plate and the right outer plate respectively.

6. The manufacturing method of the ship bow structure according to claim 5, characterized in that: The strengthening member is prefabricated, and the first connecting rib plate is welded to the right side of the platform plate; the second connecting rib plate is pre-welded to the right side of the rear transverse bulkhead plate.

7. The manufacturing method of the ship bow structure according to claim 6, characterized in that: The platform plate and the left outer plate are welded on both sides, and the rear transverse bulkhead plate and the left outer plate are welded on both sides; grooves for inserting the longitudinal stiffeners are provided on the upper sealing plate, the lower sealing plate and each platform plate. At the grooves where the longitudinal stiffener contacts the upper sealing plate, the lower sealing plate and each platform plate, welding is performed on three sides on both sides.

8. The manufacturing method of the ship bow structure according to claim 6, characterized in that: The welds between the longitudinal stiffener and the left outer plate and the welds between the longitudinal stiffener and the right outer plate are welded on one side externally.

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