JP2009248863A - Vessel structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vessel structure facilitating painting even when the high-level painting specification is required for a vessel body. <P>SOLUTION: The vessel structure is provided with a partition wall 11 for partitioning the vessel body 10 into a plurality of sections, and a rib member 22a for enhancing rigidity of the partition wall 11. On an inner plate 15 partitioning a ballast tank 17 and a cargo oil tank 16, the rib member 22a is provided on a wall surface 15a on the cargo oil tank 16 side of the ballast tank 17 and the cargo oil tank 16 having a lower level of the coating specification. Even when the high level coating specification is required for the vessel body 10, therefore, the need to enhance the coating specification of the rib member 22a is reduced. For example, the need to increase the thickness of painting of the rib member 22a or to apply edge processing for one layer in order to fulfill the high level painting specification is reduced, and painting is easily performed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hull structure, and more particularly to a hull structure such as an oil tanker.

As a conventional hull structure, a structure having a partition wall that partitions the hull into a plurality of sections and a bone member that is provided on the wall surface of the partition wall and increases the rigidity of the partition wall is known (Patent Document 1). reference).
JP 2004-299457 A

  By the way, in recent hull structures, since the coating quality has a great influence on the life of the ship, a high level of coating specifications are required for the hull. However, in the conventional hull structure described above, when the coating specifications are made to a high level, it is necessary to increase the coating thickness of the bone member, for example, and it may be difficult to perform the coating work. As a result, the construction process and thus the manufacturing cost increases.

  Then, this invention makes it a subject to provide the hull structure which can perform coating construction easily, even when a high standard coating specification is requested | required of a hull.

  In order to solve the above problems, a hull structure according to the present invention includes a partition wall that partitions the hull into a plurality of compartments, and a bone member for increasing the rigidity of the partition wall, and the bone member is adjacent to the partition wall. It is provided in the wall surface by the side of one division where the level of the required painting specification is low among the divisions to perform.

  In this hull structure, the coating specifications required for bone members (hereinafter referred to as “required coating specifications”) will be lowered, and even if the hull requires high-level coating specifications, An increase in the level of paint specifications can be suppressed. Therefore, in satisfying high-level coating specifications, for example, it is not necessary to increase the coating thickness of bone members or to further apply edge treatment for painting, and it is possible to easily perform painting construction. It becomes possible.

  Here, specifically as a structure which exhibits the said effect suitably, the structure where one division of an adjacent division is a crude oil tank, and another division is a ballast tank is mentioned.

  At this time, it is preferable that the bone member is not painted. In this case, the bone member becomes simple, and the manufacturing cost of the hull can be reduced.

  Moreover, as a structure which has the said effect suitably, specifically, the structure where one division of adjacent divisions is a dry space, and another division is a fresh water tank is mentioned. The “dry space” is a section in which no liquid is mounted, and includes, for example, a steering room and a boson store.

  The bone member has a T-shaped cross section, and includes a web portion fixed to the wall surface, and a face portion fixed to the front end side of the web portion so as to intersect the web portion. The face portion is preferably not subjected to edge processing. In this case, the bone member becomes simple, and the manufacturing cost can be reduced.

  In addition, as a configuration that preferably exhibits the above-described effect, specifically, a configuration in which one of the adjacent sections is an upper deck section and the other section is a ballast tank.

  According to the present invention, it is possible to easily perform painting even when a high-level coating specification is required for the hull.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the term “vertical” corresponds to the longitudinal direction of the hull, and the term “horizontal” corresponds to the horizontal (width) direction of the hull. Further, the terms “upper” and “lower” correspond to the vertical direction of the hull. Incidentally, in FIGS. 1-3, the thickness of each member is abbreviate | omitted for convenience.

  FIG. 1 is a schematic side view showing a ship having a hull structure according to an embodiment of the present invention. As shown in FIG. 1, the ship 1 of the present embodiment is an enlarged tank such as an oil tanker, and includes a hull 10, a propulsion device 2, and a rudder 3. In the hull 10, a plurality of sections 12 are formed by the partition wall 11. The propulsion device 2 propels the marine vessel 1 and uses, for example, a screw shaft. The rudder 3 controls the propulsion direction of the ship 1. The “section” here means a space partitioned (separated) by the partition wall 11 in the hull 10, and this space includes a closed space and an open space.

  FIG. 2 is a cross-sectional view taken along the line II-II in FIG. As shown in FIG. 2, the hull 10 includes an upper deck 13, an outer plate 14 that forms an outer shell of the hull 10, and an inner plate 15 that is watertightly provided inside the hull of the outer plate 14. The plate 14 and the inner plate 15 form a double hull structure (double hull structure).

  The upper deck 13 is provided so as to incline downward from the center of the hull toward the ship side. That is, in the upper deck 13, the center of the hull is higher than the ship side. Thereby, the drainage effect of the upper deck 13 is improved. An upper deck section 20 is formed above the upper deck 13. The upper deck section 20 is a space that is partitioned by the upper deck 13 in the hull 10, and is an open space on the upper deck 13.

  The outer plate 14 includes a ship bottom outer plate 41 that forms an outer shell on the ship bottom side, and a ship side outer plate 42 that forms an outer shell on the boat side. On the other hand, the inner plate 15 includes an inner bottom plate 51 extending in the vertical direction on the ship bottom side and a longitudinal partition wall 52 extending in the vertical direction on the ship side. That is, the hull 10 has a double bottom structure including a ship bottom outer plate 41 and an inner bottom plate 51, and a double ship side structure including a ship side outer plate 42 and a longitudinal partition wall 52.

  Further, the hull 10 includes a cargo oil tank 16 and a ballast tank 17. The cargo oil tank 16 is a compartment for loading crude oil. Here, the cargo oil tank 16 is a space inside the hull from the inner plate 15, and is defined by the upper deck 13 and the inner plate 15.

  The ballast tank 17 is a section for filling the ballast water. Here, the ballast tank 17 is a space between the outer plate 14 and the inner plate 15 (a ship bottom portion having a double bottom structure and a ship side portion having a double ship side structure), and includes an upper deck 13 and an outer plate 14. And an inner plate 15.

  FIG. 3 is a cross-sectional view taken along line III-III in FIG. As shown in FIGS. 1 and 3, the hull 10 includes a steering machine room 18 and a fresh water tank 19. The steering machine room 18 is a section for arranging hydraulic equipment and the like of the rudder 3 and is a dry space. The steering room 18 is located on the stern side of the hull 10. Here, the steering room 18 is defined by a stern bulkhead 28, a transverse bulkhead 29, a longitudinal bulkhead 52, and a second deck 27. The stern bulkhead 28 extends in the lateral direction and forms a stern. The transverse bulkhead 29 extends laterally on the bow side of the stern bulkhead 28. The second deck 27 extends along the upper deck 13 below the upper deck 13.

  The fresh water tank 19 is a compartment for storing fresh water for drinking water, for example. The fresh water tank 19 here is provided so as to be located in the steering engine room 18, and is defined by transverse partition walls 25 and 29, a longitudinal partition wall 24, an upper deck 13 and a second deck 27. The transverse bulkhead 25 extends laterally on the stern side of the transverse bulkhead 29. The longitudinal partition wall 24 extends in the vertical direction between the upper deck 13 and the second deck 27.

  Here, as shown in FIGS. 2 and 3, the hull 10 of the present embodiment includes bone members 22 a, 22 b, and 22 c that are reinforcing materials for increasing the rigidity of the partition wall 11. In the partition wall 11, the bone members 22a, 22b, and 22c are provided on the wall surface on the side of the partition 12 where the level of the required coating specification is low among the adjacent partitions 12 and 12. First, the coating specifications will be described.

  The required coating specification is set for each section 12 as a specification for performing coating, and is standardized based on, for example, the corrosion resistance required for the section 12, the use of the section 12, and the like. The required coating specifications are roughly classified into processing specifications and coating film thickness specifications.

  FIG. 4A is a chart showing an example of the processing specification. In the figure, “A1”, “A2”, and “A3” indicate the grade (level) of edge processing, which means that the level of edge processing is higher in the order of “A1” to “A3”. That is, for example, it is defined that it is necessary to perform more edge processing in the ballast tank 17 of “A3” than in the cargo oil tank 16 of “A1”. Further, in the figure, “B1” to “B3” indicate surface finish grades, meaning that the surface finish grades are higher in the order of “B1” to “B3”. In other words, for example, it is defined that the surface polishing needs to be further performed in the ballast tank 17 of “B3” than in the cargo oil tank 16 of “B1”.

  FIG. 4B is a chart showing an example of the coating film thickness specification. The value in the figure defines the minimum thickness of the coating film required for the members in each section. Therefore, the larger the minimum thickness value, the higher the grade. In addition, “-” in the figure means that painting is unnecessary.

  The coating specifications here are based on ISO / DIS 8501-1: 1988. Also, as shown in the figure, the processing specification and the coating film thickness specification are correlated with each other, and if the grade of one processing specification is high in the two sections to be compared, the coating film according to this one coating thickness specification The thickness is also thicker. Incidentally, the above-mentioned coating specification is an example, and it may of course be different depending on the size and type of the ship 1.

  Therefore, as shown in FIG. 2, the inner plate 15 that partitions the ballast tank 17 and the cargo oil tank 16 has a lower required coating specification grade for the cargo oil tank 16 than the required coating specification grade for the ballast tank 17. (See FIG. 4), a bone member 22a is provided on the wall surface 15a of the inner plate 15 on the cargo oil tank 16 side.

  The bone member 22a extends along the vertical direction, and is welded and fixed to the wall surface 15a. As shown in FIG. 5, the bone member 22 a has a T-shaped cross section in the longitudinal direction, and includes a plate-shaped web portion 31 and a face portion 32. The web portion 31 is fixed to the wall surface 15a via a welded portion W1 so as to be orthogonal to the wall surface 15a of the inner plate 15. The face portion 32 is fixed to the distal end side of the web portion 31 via a welded portion W2 so as to be orthogonal to the web portion 31.

  The bone member 22a is in an unpainted state that is not painted. Further, the face portion 32 of the bone member 22a is not subjected to edge processing, and the corner portion thereof remains sharp.

  Returning to FIG. 2, in the upper deck 13 (the ship side portion of the upper deck 13) that partitions the ballast tank 17 and the upper deck section 20, the required coating specification of the upper deck section 20 is higher than the grade of the required coating specification of the ballast tank 17. Since the grade is low (see FIG. 4), the bone member 22 b is provided on the wall surface 13 a on the upper deck section 20 side of the upper deck 13. The bone member 22b extends along the vertical direction and is welded and fixed to the wall surface 13a. The bone member 22b is painted with a predetermined coating film thickness. Further, as shown in FIG. 6, the bone member 22b is in a state where the corner portion of the face portion 32b is subjected to edge processing and the corner portion is dropped.

  As shown in FIG. 3, in the partition walls 24 and 25 that partition the fresh water tank 19 and the steering chamber 18, the required coating specification grade of the steering chamber 18 is lower than the required coating specification grade of the fresh water tank 19 ( 4), bone members 22c are provided on the wall surfaces 24a, 25a of the partition walls 24, 25 on the steering machine room 18 side. The bone member 22c extends along the vertical direction and is fixed by welding to the wall surfaces 24a and 25a. The bone member 22c is painted with a predetermined coating film thickness. In addition, the face portion of the bone member 22c is not subjected to edge processing, and the corner portion thereof remains sharp as in the case of the bone member 22a.

  Further, the hull 10 includes a beam member 23. As shown in FIG. 2, the beam member 23 is disposed between adjacent bone members 22a and 22a, and is welded and fixed to each of them. Moreover, the beam member 23 is arrange | positioned between the adjacent bone members 22c and 22c, as shown in FIG. 3, and is welded and fixed to each of these. Here, the beam member 23 is provided between the plurality of bone members 22a and 22a (see FIG. 2), and is provided between the plurality of bone members 22c (see FIG. 3). As a result, the beam member 23 connects and supports the adjacent bone members 22a and 22a to each other and supports the adjacent bone members 22c and 22c by connecting to each other to prevent the bone members 22a and 22c from falling down. To do.

  In the above, the upper deck 13, the outer plate 14, the inner plate 15, the longitudinal partition walls 24 and 52, the transverse partition walls 25 and 29, the second deck 27 and the stern partition wall 28 constitute the partition wall 11, and the cargo oil tank 16, ballast The tank 17, the steering machine room 18, the fresh water tank 19 and the upper deck section 20 constitute a section 12.

  As described above, according to the present embodiment, in the partition wall 11, the bone members 22 a, 22 b, and 22 c are provided on the wall surface on the side of the partition 12 having a low level of required coating specifications among the adjacent partitions 12 and 12. Therefore, the required painting specifications of the bone members 22a, 22b, and 22c are lowered, and even when the hull 10 requires a high level of painting specifications, the level of the painting specifications of the bone members 22a, 22b, and 22c is increased. Can be suppressed. That is, in order to satisfy high-level coating specifications, for example, it is not necessary to increase the coating thickness of the bone members 22a, 22b, and 22c, or to further apply edge treatment, and to facilitate the coating work. Is possible. Therefore, even when a high-level coating specification is required for the hull 10, it is possible to easily perform the painting work. As a result, the construction time can be shortened, and as a result, the manufacturing cost can be reduced.

  In the present embodiment, as described above, the bone member 22a is not painted, and the bone member 22a is simple. Therefore, the manufacturing cost of the hull 10 can be further reduced. This is because the ship 1 loads the crude oil on the cargo oil tank 16 as described above, and therefore the required paint specification (paint film thickness specification) of the cargo oil tank 16 can be made relatively low. .

  Moreover, in this embodiment, as mentioned above, the edge process is not performed to the face part 32 of the bone members 22a and 22c, and the bone members 22a and 22c are simple. In this respect as well, the manufacturing cost of the hull 10 can be further reduced. This can be said to be because the required paint specifications (processing specifications) of the cargo oil tank 16 and the steering machine room 18 can be made relatively low as described above.

  Incidentally, in the future, it is expected that coating specifications will be stipulated in the inspection standards of the classification society, and it is expected that high-level coating specifications will also be required as inspection standards. Therefore, the above-described effect of the present embodiment, that is, the effect of easily performing the coating work even when a high-level coating specification is required for the hull 10 is particularly effective. In addition, since coating defects in the hull 10 are likely to occur in the bone members 22a, 22b, and 22c, by reducing the required coating specifications of the bone members 22a, 22b, and 22c as described above, the hull 10 as a whole is reduced. It can be said that the coating quality of this is substantially improved.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, the ship 1 of the above embodiment is an oil tanker that loads crude oil, but may be another tanker that stacks other than crude oil, a bulk carrier, or the like. Further, the section 12 is not limited to those described above, and may be various sections.

  Moreover, in the said embodiment, in order to reduce manufacturing cost, the bone member 22a is not painted, and the edge process is not performed to each face part of the bone members 22a and 22c, However, The bone member 22a is painted, The bone member 22a , 22c may of course be subjected to edge processing.

It is a schematic side view which shows the ship of the hull structure which concerns on one Embodiment of this invention. It is sectional drawing along the II-II line of FIG. It is sectional drawing along the III-III line of FIG. (A) is a chart which shows an example of a processing specification, (b) is a chart which shows an example of a coating film thickness specification. It is an enlarged view which shows the bone member provided in the inner board. It is an enlarged view which shows the bone member provided in the upper deck.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Hull, 11 ... Partition wall, 12 ... Partition, 13 ... Upper deck (partition wall), 14 ... Outer plate (partition wall), 15 ... Inner plate (partition wall), 16 ... Cargo oil tank (crude oil tank, partition) ), 17 ... Ballast tank (compartment), 18 ... Steering machine room (dry space, compartment), 19 ... Fresh water tank (compartment), 20 ... Upper deck compartment (compartment), 22a, 22b, 22c ... Bone member, 24, 52 ... Vertical partition wall (partition wall), 25, 29 ... Transverse partition wall (partition wall), 27 ... Second deck (partition wall), 28 ... Stern partition wall (partition wall), 31 ... Web part, 32, 32b ... Face Department.

Claims (6)

A partition wall that partitions the hull into a plurality of compartments;
A bone member for increasing the rigidity of the partition wall,
The said hull member is provided in the wall surface of the one division side with the low level of the required painting specification among the said adjacent divisions in the said partition wall, The hull structure characterized by the above-mentioned.   The hull structure according to claim 1, wherein the one of the adjacent compartments is a crude oil tank, and the other compartment is a ballast tank.   The hull structure according to claim 2, wherein the bone member is not painted.   2. The hull structure according to claim 1, wherein one of the adjacent compartments is a dry space, and the other compartment is a fresh water tank. The bone member has a T-shaped cross section, and includes a web portion fixed to the wall surface and a face portion fixed to the front end side of the web portion so as to intersect the web portion. And
The hull structure according to any one of claims 2 to 4, wherein the face portion is not subjected to edge processing. 2. The hull structure according to claim 1, wherein the one of the adjacent sections is an upper deck section, and the other section is a ballast tank.

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