JP6898404B2 - Tanker top stool placement structure - Google Patents

Description

The present invention relates to an upper stool arrangement structure for suspending and fixing vertical and horizontal corrugated partition walls that partition a cargo tank of a tanker.

Oil tankers, chemical tankers, etc. are partitioned into multiple cargo tanks because it is necessary to load multiple cargoes (liquid cargo) at once, and corrugated bulkheads (corrugated bulkheads) with irregularities in plan view are used on the walls of each partition. Will be done. That is, the structure was such that a stool having a trapezoidal cross section was provided on the ballast tank at the bottom of the tanker cargo tank with a hull, and a corrugated bulkhead was placed on the stool.
FIG. 2 shows a corrugated partition wall and a stool structure for partitioning a cargo tank of this type of tanker by a corrugated partition wall, which has already been proposed by the applicant company of the present application. ), It is a schematic perspective view of a main part of the lower end structure of the corrugated partition wall according to the embodiment of the device disclosed in Jitsuzenpei 04-1091 attached as FIG.

In FIG. 2, 100 is a corrugated bulkhead, 101 is a trapezoidal stool in cross section, 102 is an inner bottom plate, and α is a downward slope toward the hull center line in the width direction of the upper surface of the stool or the upper surface of the inner bottom plate. The angle, β, is the divergent angle of the corrugated partition wall (the divergent angle of the corrugated partition wall formed by the web and the face plate). I changed it to a digit and explained it.)

As is clear from FIG. 2, the tanker assumed in FIG. 2 is not a cargo tank partitioned in the hull direction, so only the corrugated partition wall 100 arranged in the hull width direction is shown. Due to the huge size and the need to transport a wide variety of liquid cargo, there is also a demand for tankers with a structure in which the cargo tank is partitioned by corrugated partition walls in the width direction of the tanker. It is a figure which shows the outline of the stool structure at the intersection of the corrugated partition wall of the cargo tank of a tanker partitioned in both directions, FIG. 3A is a schematic cross-sectional view in the hull lateral direction (ship width direction), and FIG. , A cross-sectional view of the hull in the vertical direction (traverse of the captain), FIG. 3 (c) is a plan view of the intersection as viewed from above.

In FIGS. 3 (a), (b) and (c), if the signs are described in accordance with FIG. 2, 100a is a corrugated vertical partition wall (corrugated bulkhead) arranged in the captain direction, and 100b is in the ship width direction. The corrugated horizontal bulkhead (corrugated bulkhead) to be arranged, 101a is a vertical stool arranged in the captain direction, 101b is a horizontal stool arranged in the width direction of the ship, 102a and 102b are cargo tanks, and 103 is an inner bottom plate. , 104 are ship bottom ballast tanks, the one-point chain line in FIG. 3C is the upper bottom edge which is the stool top of the vertical stool 101a and the horizontal stool 101b, and the fine dotted line is the lower bottom of the stools 101a and 101b, respectively. It is a stool.

As shown in FIG. 3C, the horizontal stool 101b has a trapezoidal cross section as a whole over the entire length, but at the intersection of the corrugated vertical partition wall 100a and the corrugated horizontal partition wall 100b, the horizontal stool 101b and the corrugated horizontal partition wall 100b. The horizontal stool 101b is configured to have a single trapezoidal cross section so that the horizontal stool 101b is flush with the lower parts of the cargo tanks 102a and 102b, and the single trapezoidal vertical surface of the horizontal stool 101b is a recess of the corrugated horizontal partition 100b. It is face-to-face joined (for example, in FIG. 3C, the horizontal stool 101b is joined face-to-face at the right end in the captain direction).

On the other hand, the width of the upper base of the vertical stool 101a having a trapezoidal cross section is the same as the unevenness interval of the corrugated vertical partition wall 100a, and the center of the concave-convex interval of the corrugated vertical partition wall 100a is the center of the vertical stool 101a. Consistent with, both uneven surfaces of the corrugated vertical partition wall 100a are joined to both upper and lower surfaces of the vertical stool 101a.
Then, as shown in FIGS. 2 and 3 (a), (b), and (c), the tanker stool 101 and the corrugated partition wall 100 erected on the stool 101 are placed on the hull on the tank top of the bottom ballast tank 104. The stools 101a and 101b were arranged, and the corrugated partition walls 100a and 100b were installed above the stools 101a and 101b.

In a tanker having such a structure, the cargo often changes for each voyage, and it is necessary to clean the inside of the cargo tanks 102a and 102b each time. In order to clean the cargo slag accumulated on the stool top exposed in the cargo tanks 102a and 102b at the upper bottom of the stools 101a and 101b to be arranged, the worker enters the cargo tanks 102a and 102b and has a length of about 2 m to 3 m. It was necessary to climb up to the stool top on the slope with a ladder or the like to perform cleaning work. This work is a great effort to clean the tank, and it takes a lot of time to clean the tank.

Jitsuzenpei 04-1091

Therefore, instead of the stool installed on the tank top in the cargo tank (so to speak, the "lower stool"), the "upper stool structure" is placed on the ceiling above the cargo tank, and the corrugated partition wall is hung from the upper stool. By supporting it by lowering and joining the lower part of the corrugated partition wall with the tank top, the residual liquid (load slag) does not stay on the stool top even when the cargo is changed, and the stool top is used when cleaning the cargo tank. It is intended to provide a tanker upper stool placement structure that allows work without climbing.

In order to solve the above problems, the invention according to claim 1 of the present application is a corrugated vertical partition wall and / or a corrugated horizontal partition wall that is joined to the cargo tank ceiling of the tanker and partitions the cargo tank into a plurality of parts in the tanker upper stool arrangement structure. An upper vertical stool and / or an upper horizontal stool that suspends and fixes the partition wall, the lower bottom width of the upper vertical stool is the same width as the uneven spacing of the corrugated vertical partition wall, and the center of the uneven spacing of the corrugated vertical partition wall is the upper vertical stool. centered match and both uneven surface wave longitudinal partition walls, characterized in Oh Rukoto the upper longitudinal stool having a lower base width to be suspended bonded flush to both the bottom surface of the upper longitudinal stool.
Further, the invention according to claim 2 of the present application states that in the tanker upper stool arrangement structure according to claim 1, the upper vertical stool and / or the upper horizontal stool has an inverted trapezoidal cross section or an inverted trapezoidal cross section. It is a feature.
Further, in the invention according to claim 3, in the tanker upper stool arrangement structure according to any one of claims 1 or 2, the upper vertical stool and the upper horizontal stool are the intersections of the corrugated vertical partition wall and the corrugated horizontal partition wall. It is characterized by being a stool placed in.
The invention according to claim 4 of the present application relates to the upper stool arrangement structure of the tanker according to any one of claims 1 to 3, in which the upper vertical stool is arranged in the width direction of the cargo tank in the direction of the captain. It is characterized by being a stool that is joined to a flat ceiling.
Further, the invention according to claim 5 of the present application follows the shape of the ceiling of the cargo tank in which the upper horizontal stools are juxtaposed in the width direction of the ship in the tanker upper stool arrangement structure according to any one of claims 1 to 4. The height is lowered toward the ship side, and the upper part of the side surface has a side surface that enters the inside of the cargo tank.
Further, in the invention according to claim 6, in the upper stool arrangement structure of the tanker according to any one of claims 1 to 5, the upper horizontal stool is a cross-section inverted piece at the intersection of the corrugated vertical partition wall and the corrugated horizontal partition wall. It is trapezoidal, and the vertical surface of the inverted single trapezoid is flush with the concave surface of the corrugated horizontal partition wall.

Since it is configured as described above, the present invention can work without climbing the stool top when cleaning the cargo tank because the cargo slag does not remain on the stool top even when the cargo of the tanker is changed. It becomes. As described above, since there is no step on the tank top due to its structure, it has an effect of contributing to the reduction of the load in the tank cleaning work.

1 (a), (b), and (c) are views showing an outline of an intersection of corrugated partition walls of a tanker cargo tank according to a first embodiment of the tanker upper stool arrangement structure of the present invention. ) Is a schematic cross-sectional view of the hull in the horizontal direction (width direction), FIG. 1 (b) is a cross-sectional view of the hull in the vertical direction (transverse of the captain), and FIG. 1 (c) is a flat view of the intersection from above. It is a cross-sectional view. FIG. 2 is a schematic perspective view of a main part of a corrugated partition lower end structure according to an embodiment of the disclosure device attached as FIG. 1 to Japanese Patent Application Laid-Open No. 04-1091 proposed by the applicant company of the present application. FIG. 3 is a diagram showing an outline of a stool structure arranged at an intersection of corrugated partition walls of a cargo tank of a tanker partitioned in both directions of the captain and the beam, which is carried out by the applicant company of the present application, and FIG. 3 (a) is a diagram showing an outline of a stool structure arranged at an intersection of corrugated partition walls. A schematic cross-sectional view in the horizontal direction (width direction), FIG. 3 (b) is a cross-sectional view in the vertical direction (captain traverse) of the hull, and FIG. 3 (c) is a plan view of the intersection viewed from above.

As a mode for carrying out the upper stool arrangement structure of the tanker according to the present invention, an embodiment will be described in detail with reference to the drawings.

1 (a), (b), and (c) are views showing an outline of an intersection of corrugated partition walls of a tanker cargo tank according to a first embodiment of the tanker upper stool arrangement structure of the present invention. ) Is a schematic cross-sectional view of the hull in the horizontal direction (width direction), FIG. 1 (b) is a cross-sectional view of the hull in the vertical direction (transverse of the captain), and FIG. 1 (c) is a flat view of the intersection from above. It is a cross-sectional view.

In FIGS. 1A, 1B and 1C, reference numeral 1 is an upper stool arrangement structure of the tanker according to the first embodiment of the present invention, and 2a is a corrugated vertical partition wall (corrugated bulkhead) arranged in the captain direction. ), 2b is a corrugated horizontal bulkhead (corrugated bulkhead) arranged in the width direction of the ship, 3a is an upper vertical stool arranged in the length direction of the ship, 3b is an upper horizontal stool arranged in the width direction of the ship, 4a, 4b is a cargo tank, 5 is an inner bottom plate, and 6 is a ship bottom ballast tank. (Note that the vertical stool and horizontal stool of the tanker upper stool arrangement structure 1 according to the first embodiment are shown in FIG. 3 and the like. The word "upper" was added to distinguish it from the conventional downward stool.)

As is clear from FIGS. 1A, 1B, and 1C, in the tanker upper stool arrangement structure 1 according to the first embodiment, the stools conventionally installed on the tank top 5 of the ship bottom ballast tank 6. Is placed above the cargo tanks 4a and 4b, and the corrugated partition partition that partitions vertically and horizontally from the top is suspended and supported, and the lower end of the corrugated partition wall is joined to the tank top. (Stool top) no longer exists, which makes it possible to perform cleaning work without climbing the stool top when cleaning the cargo tanks 4a and 4b, which is a safe and significantly improved tanker cargo. It becomes a tank.

That is, as is clear from FIGS. 1A, 1B, and 1C, the upper part of the tanker upper stool arrangement structure 1 according to the first embodiment in the vertical direction (captain direction) and the horizontal direction (width direction) of the hull. The vertical stool 3a and the upper horizontal stool 3b are joined and fixedly arranged on the ceiling portion at the partition intersection position of the cargo tanks 4a and 4b. Since the upper vertical stool 3a and the upper horizontal stool 3b have a shape structure joined and arranged on the ceiling of the cargo tanks 4a and 4b, the cross-sectional shapes of the upper vertical stool 3a and the upper horizontal stool 3b are trapezoidal, respectively. It exhibits a so-called inverted trapezoidal upper vertical stool 3a and upper horizontal stool 3b structure that is upside down, and each waveform under each of these inverted trapezoidal upper vertical stools 3a and upper horizontal stools 3b. The vertical partition 2a and the corrugated horizontal partition 2b are suspended and fixed, and they are lowered downward, and their lower ends are connected to the tank top 5 constituting the floor of the cargo tanks 4a and 4b, respectively.

Therefore, when the stool structure at each partition wall intersection of the tanker upper stool structure 1 according to the first embodiment is viewed from above the hull, it is as shown in FIG. 1 (c) as described above. That is, in FIG. 1 (c), the solid line shows the joint surface between the upper bottom edges of the upper vertical stool 3a and the upper horizontal stool 3b having an inverted trapezoidal cross section and the ceiling portion of the cargo tanks 4a and 4b, and inside the joint surface. The alternate long and short dash line indicates the lower bottom edges of the upper vertical stool 3a and the upper horizontal stool 3b having an inverted trapezoidal cross section, and the broken line indicates the corrugated vertical partition 2a and the corrugated horizontal partition 2b arranged below the upper vertical stool 3a and the upper horizontal stool 3b.

As shown in FIG. 1A, the upper vertical stool 3a of the tanker upper stool arrangement structure 1 according to the first embodiment is flat in the captain direction between the cargo tanks 4a and 4b juxtaposed in the hull direction. The upper horizontal stool 3b has a ceiling shape that is slightly inclined from the center of the hull toward the ship side, so the ceiling of the cargo tanks 4a and 4b juxtaposed in the width direction of the ship is the ceiling part. The height becomes lower in the ship side direction along the ship side, and the upper side surface of the cargo tanks 4a and 4b juxtaposed in the ship width direction has a structure that enters the inside of the cargo tanks 4a and 4b, so that it fits the entry side surface. It becomes a shape.

Then, these upper vertical stools 3a and upper horizontal stools 3b are joined and fixedly arranged on the ceiling of the cargo tanks 4a and 4b, and the joining is joined to the hull material behind the ceiling plate of the ceiling. It is natural that they are joined and fixed so as to be strong and suitable.

In FIG. 1C, the corrugated vertical partition wall 2a and the corrugated horizontal partition wall 2b are indicated by thick broken lines, and for the vertical trapezoidal section 3a, the lower bottom edge of the inverted trapezoidal cross section is indicated by a chain line and the upper bottom edge of the trapezoidal shape is indicated by a chain line. It is shown by a solid line. As shown in FIG. 1 (c), the upper horizontal stool 3b has an inverted trapezoidal cross section as a whole, but at the intersection of the corrugated vertical partition wall 2a and the corrugated horizontal partition wall 2b, the corrugated horizontal partition wall 2b The upper horizontal stool 3b is configured to have an inverted trapezoidal cross section so that the upper horizontal stool 3b is flush with the lower part of the cargo tanks 4a and 4b, and the vertical surface of the inverted trapezoid of the upper horizontal stool 3b is formed. The concave surface of the corrugated horizontal partition wall 2b is joined flush with the concave surface (in the example of FIG. 1C, the upper horizontal stool 3b is joined flush with the right end in the captain direction), and the corrugated horizontal partition wall 2b and the upper horizontal stool 3b are joined. By making the wall surface flush with each other, the retention of loaded cargo is reduced, and the strength is also excellent.

On the other hand, the lower base width of the upper vertical stool 3a having an inverted trapezoidal cross section is the same width as the uneven spacing of the corrugated vertical partition wall 2a, and the corrugated vertical partition wall 2a has the upper vertical stool at the center of the concave-convex spacing of the corrugated vertical partition wall 2a. Both uneven surfaces of the corrugated vertical partition wall 2a are suspended and joined flush to the lower bottom surfaces of the upper vertical stool 2a so as to coincide with the center of 3a.
In the upper stool arrangement structure 1 of the tanker according to the first embodiment, the upper horizontal stool 3b is formed at the cross section of the partition wall, and the corrugated horizontal partition wall 2b and the upper horizontal stool 3b are flush with each other up to the lower part of the cargo tanks 4a and 4b. As described above, the upper horizontal stool 3b is configured to have a trapezoidal cross section, which is the inverted trapezoidal shape of the upper horizontal stool 3b and the upper vertical stool 3a and the inverted trapezoidal cross section at the partition wall intersection. Alternatively, the vertical surface having an inverted trapezoidal cross section may be configured to be flush with either the front or rear side surface of the cargo tanks 4a and 4b.

According to the tanker upper stool arrangement structure 1 according to the first embodiment, the upper vertical stool is placed on the ceiling of the upper part of the cargo tank instead of the stool (“lower stool”) installed on the lower tank top in the conventional cargo tank. A stool structure is provided in which the 3a and the upper horizontal stool 3b are arranged, and the corrugated vertical partition wall 2a and the corrugated horizontal partition wall 2b are supported by the upper vertical stool 3a and the upper horizontal stool 3b. Since the structure is such that it is joined to the tank top 5 on the ballast tank 6, there is no stool top that may retain residual liquid (load slag) even when the load is changed, and it can be used as a stool top when cleaning the cargo tank. There is no need to climb, and the workability of tank cleaning will be improved.

Further, since the tanker upper stool arrangement structure 1 according to the first embodiment is adopted, it can be easily applied to various tankers by performing relatively simple structural adjustment, and also in terms of structure, it is a ship. It is not possible to easily follow the bending and deformation of the hull during navigation and cargo handling, cracks do not occur in the slant plate part, and it is possible to achieve tanker construction that is comparable to tankers with lower stools. ..

INDUSTRIAL APPLICABILITY The present invention is used for an upper stool arrangement structure in which vertical and horizontal corrugated partition walls partitioning a cargo tank of a tanker are suspended and fixed.

1 Upper stool arrangement structure of the tanker according to the first embodiment of the present invention 2a Corrugated vertical partition 2b Corrugated horizontal partition 3a Upper vertical stool 3b Upper horizontal stool 4a, 4b Cargo tank 5 Tank top 6 Ballast tank 100 Corrugated partition 100a Corrugated vertical partition 100a Corrugated partition 100b Corrugated horizontal partition 101 Stool 101a Vertical stool 101b Horizontal stool 102a, 102b Cargo tank 103 Informal plate 104 Ship bottom ballast tank

Claims (6)

Joined disposed cargo tank ceiling of the tanker, the waveform vertical partition wall and / or hanging the waveform transverse partition fixing to the upper longitudinal stool and / or upper horizontal stool in an in lower base width of the upper longitudinal stool dividing the cargo tank into plural Is the same width as the uneven spacing of the corrugated vertical partition, the center of the concave-convex spacing of the corrugated vertical partition coincides with the center of the upper vertical stool, and both uneven surfaces of the corrugated vertical partition are flush with both lower bottom surfaces of the upper vertical stool. upper stool arrangement tanker characterized by Oh Rukoto the upper longitudinal stool having a lower base width to be suspended joined. The upper stool arrangement structure for a tanker according to claim 1, wherein the upper vertical stool and / or the upper horizontal stool has an inverted trapezoidal cross section or an inverted trapezoidal cross section. The tanker upper stool arrangement structure according to claim 1 or 2, wherein the upper vertical stool and the upper horizontal stool are stools arranged at the intersection of the corrugated vertical partition wall and the corrugated horizontal partition wall. The upper stool of a tanker according to any one of claims 1 to 3, wherein the upper vertical stool is a stool joined to a flat ceiling portion in the captain direction between cargo tanks juxtaposed in the width direction of the ship. Arrangement structure. The upper horizontal stool is characterized in that it has a height that becomes lower in the ship side along the shape of the ceiling of the cargo tank juxtaposed in the width direction of the ship, and that the upper side surface has a side surface that enters the inside of the cargo tank. The tanker upper stool arrangement structure according to any one of claims 1 to 4. Claim 1 is characterized in that the upper horizontal stool has an inverted trapezoidal cross section at the intersection of the corrugated vertical partition wall and the corrugated horizontal partition wall, and the vertical surface of the inverted single trapezoidal surface is flush with the concave surface of the corrugated horizontal partition wall. The tanker upper stool arrangement structure according to any one of 5 to 5.

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