Ship

Abstract

This ship comprises a hull, a cylindrical tank provided in the hull and having an axis extending in the horizontal direction, and a tank support part provided in the hull and supporting the tank, wherein: the tank support part includes a plurality of saddles that extend in the circumferential direction along the outer peripheral surface of a lower part of the tank and that are spaced apart from each other in the axial direction in which the axis extends; and the plurality of saddles include one fixed saddle that supports the tank so as not to allow movement in the axial direction, and a plurality of slide saddles that support the tank so as to allow sliding in the axial direction.

Description

ship

[0001] This application claims priority to Japanese Patent Application No. 2023-204048, filed on December 1, 2023, the contents of which are incorporated herein by reference.

[0002] Patent Document 1 discloses a configuration in which a cylindrical tank having an axis extending horizontally and capable of storing LNG fuel is supported by a pair of saddles spaced apart in the axial direction.

[0003] Japanese Patent Application Laid-Open No. 2022-29967

[0004] However, for example, when attempting to increase the size of a tank, the weight of the material stored in the tank increases, resulting in a larger load acting from the tank on the pair of saddles. Furthermore, when storing a material with a high specific gravity in the tank, the load acting from the tank on the pair of saddles also increases. As such, when the load acting from the tank on the pair of saddles increases, the reaction force acting from the saddles on the tank also increases. Increasing the strength of the tank to resist the stress acting on the tank due to the reaction force from the saddles leads to an increase in the tank's own weight, an increase in material costs, and the like. Therefore, the configuration described in Patent Document 1 may hinder the increase in size of the tank and the storage of a material with a high specific gravity.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a ship that reduces the reaction force from the saddle and can accommodate larger tanks and the storage of materials with high specific gravity.

[0006] In order to solve the above problems, the vessel according to the present disclosure includes a hull, a tank, and a tank support portion. The tank is provided on the hull and is cylindrical with an axis extending horizontally. The tank support portion is provided on the hull and supports the tank. The tank support portion has a plurality of saddles. The plurality of saddles extend circumferentially along the outer peripheral surface of the lower part of the tank and are provided spaced apart in the axial direction along which the axis extends. The plurality of saddles include one fixed saddle and a plurality of sliding saddles. The one fixed saddle supports the tank so that it cannot move in the axial direction. The plurality of sliding saddles support the tank so that it can slide in the axial direction.

[0007] According to the ship of the present disclosure, it is possible to provide a ship that reduces the reaction force from the saddle and can accommodate larger tanks and the storage of materials with high specific gravity.

[0008] FIG. 5 is a side view of a vessel according to an embodiment of the present disclosure. FIG. 6 is a side view showing a tank and a tank support part according to an embodiment of the present disclosure. FIG. 7 is a view of a fixed saddle according to an embodiment of the present disclosure as viewed from an axial direction. FIG. 8 is a cross-sectional view taken along arrows A-A in FIG. 3. FIG. 9 is a view of a sliding saddle according to an embodiment of the present disclosure as viewed from an axial direction. FIG. 10 is a cross-sectional view taken along arrows B-B in FIG. 5. FIG. 11 is a cross-sectional view of a sliding saddle according to a second embodiment of the present disclosure. FIG. 12 is a cross-sectional view of a sliding saddle according to a first modified example of the second embodiment of the present disclosure. FIG. 13 is a cross-sectional view of a sliding saddle according to a third embodiment of the present disclosure as viewed from an axial direction. FIG. 14 is a cross-sectional view of a sliding saddle according to a fourth embodiment of the present embodiment.

[0009] First Embodiment A ship according to an embodiment of the present disclosure will now be described with reference to Figures 1 to 10. (Overall Configuration of Ship) As shown in Figure 1, a ship 1 according to this embodiment includes at least a hull 2 ​​and a tank facility 10. Examples of the ship 1 include a carrier ship for liquefied gases such as carbon dioxide, liquefied natural gas (LNG), and ammonia, a cargo ship, a ferry, a roll-on / roll-off ship (RORO ship), a pure car and truck carrier (PCTC), a passenger ship, and an observation / research ship.

[0010] (Hull Structure) The hull 2 ​​has a pair of side walls 3A, 3B that form its outer shell, a bottom wall 4, and an upper deck 5. The side walls 3A, 3B have a pair of side wall shell plates that form the port and starboard sides, respectively. The bottom wall 4 has a bottom wall shell plate that connects the side walls 3A, 3B. The hull 2 ​​has a superstructure 7 that has accommodation areas formed on the upper deck 5, for example, on the stern 2b side.

[0011] 1 and 2, the tank facility 10 includes at least a tank 11 and a tank support portion 20A.

[0012] The tank 11 is capable of storing a liquid therein. Examples of the liquid stored in the tank 11 include liquefied gases such as carbon dioxide, liquefied natural gas (LNG), and ammonia. The tank 11 of this embodiment is housed, for example, in the hull 2. The tank 11 of this embodiment may store a liquid as fuel for a combustor of, for example, a main engine, an auxiliary engine, a generator engine (none of which are shown) housed in the hull 2.

[0013] 1, in this first embodiment, for example, two tanks 11 (tank equipment 10) are arranged side by side in the fore-and-aft direction FA inside the hull 2. Note that the number and arrangement of the tanks 11 are not limited in any way and can be changed as appropriate. For example, the tanks 11 may be provided in other positions, such as on the upper deck 5.

[0014] 2, each tank 11 is a cylindrical container having a horizontally extending axis O. In this first embodiment, the axis O of each tank 11 extends in the bow-stern direction FA. Each tank 11 includes a cylindrical portion 11a and a head portion 11b.

[0015] The cylindrical portion 11a is provided in the middle of the tank 11 in the fore-and-aft direction FA, and is formed into a cylindrical shape that continues in the fore-and-aft direction FA. The cylindrical portion 11a has a circular shape when viewed in the axial direction Da (fore-and-aft direction FA) in which the axis O extends. In this first embodiment, the diameter of the cylindrical portion 11a is constant in the axial direction Da.

[0016] The end plate portions 11b are provided at both ends of the cylindrical portion 11a in the axial direction Da. Each end plate portion 11b is hemispherical and closes the opening at both ends of the cylindrical portion 11a in the axial direction Da.

[0017] The tank support portion 20A is provided on the hull 2. The tank support portion 20A supports the tank 11. The tank support portion 20A has a plurality of saddles 21 that can support the tank 11 from below. The plurality of saddles 21 are provided at intervals in the axial direction Da.

[0018] The tank support portion 20A includes a plurality of saddles 21, including a first saddle 22, a second saddle 23, and a third saddle 24. The first saddle 22, the second saddle 23, and the third saddle 24 are spaced apart in the axial direction Da. The first saddle 22 is provided, for example, on one side of the center of the tank 11 in the axial direction Da. The first saddle 22 illustrated in this embodiment is provided on the stern 2b side in the fore-aft direction FA. The second saddle 23 is provided in the center of the tank 11 in the axial direction Da. The second saddle 23 is provided, for example, between the first saddle 22 and the third saddle 24 in the axial direction Da. The third saddle 24 is disposed on the other side of the center of the tank 11 in the axial direction Da. The third saddle 24 is provided, for example, on the bow 2a side in the fore-aft direction FA.

[0019] Figure 3 is a view of a fixed saddle according to an embodiment of the present disclosure as viewed from the axial direction. Figure 4 is a cross-sectional view taken along the line A-A in Figure 3. In this first embodiment, the first saddle 22 is a fixed saddle. As shown in Figures 3 and 4, the first saddle 22, which is a fixed saddle, supports the tank 11 so that it cannot move in the axial direction Da. The first saddle 22 (fixed saddle) includes a base member 221 fixed to the hull 2 ​​and a fixed block member (block member) 222.

[0020] As shown in FIG. 4 , the base member 221 is fixed to the hull 2. The base member 221 has legs 221k extending downward. The base member 221 is made of, for example, metal and is fixed to the hull 2 ​​by welding or other means. A downwardly recessed, arc-shaped curved surface 221f is formed on the upper surface of the base member 221. The base member 221 also has a pair of wall portions 221w that rise from both ends of the curved surface 221f in the axial direction Da toward the inside in the radial direction Dr, centered on the axis O of the tank 11. The radius of curvature of the curved surface 221f of the base member 221 facing the inside in the radial direction Dr, when viewed from the axial direction Da, is larger than the radius of curvature of the outer peripheral surface of the fixed block member 222 (described below). A filler material (not shown), such as resin, is filled between the curved surface 221f and the outer peripheral surface of the fixed block member 222.

[0021] The fixed block member 222 is fixed to the outer peripheral surface of the tank 11. When viewed from the axial direction Da, the fixed block member 222 extends in a semicircular arc shape in the circumferential direction Dc along the outer peripheral surface of the lower half of the tank 11. Here, the fixed block member 222 has a semicircular arc shape as a whole by arranging multiple block bodies 222b in the circumferential direction Dc.

[0022] The fixed block member 222 is formed, for example, in a rectangular shape in a cross section perpendicular to the circumferential direction Dc. The fixed block member 222 is placed on the curved surface 221f of the base member 221. The fixed block member 222 is housed between a pair of wall portions 221w. As a result, the fixed block member 222 is sandwiched between the pair of wall portions 221w and fixed so as not to be displaceable in the axial direction Da.

[0023] The fixed block member 222 is provided along the outer peripheral surface of the tank 11. The fixed block member 222 is fixed to the outer peripheral surface of the tank 11 with epoxy resin or the like.

[0024] The fixed block member 222 has a slit 222s in the middle in the axial direction Da that recesses from the inner circumferential surface outward in the radial direction Dr. A protrusion 11t is provided on the outer circumferential surface of the tank 11 and is inserted into this slit 222s. The protrusion 11t protrudes outward in the radial direction Dr from the outer circumferential surface of the tank 11. By inserting the protrusion 11t into the slit 222s, the fixed block member 222 is fixed to the tank 11 so as not to be displaceable in the axial direction Da. Here, the slit 222s and the protrusion 11t may extend in the circumferential direction Dc. Multiple pairs of the slits 222s and the protrusions 11t may be provided at intervals in the circumferential direction Dc.

[0025] The fixed block member 222 is made of a heat insulating material having a lower thermal conductivity than the metal material forming the base member 221 and the tank 11. An example of the heat insulating material forming the fixed block member 222 is laminated wood such as beech wood.

[0026] Figure 5 is a view of a sliding saddle according to an embodiment of the present disclosure as viewed from the axial direction. Figure 6 is a cross-sectional view taken along the line B-B in Figure 5. As shown in Figures 5 and 6, in this first embodiment, the second saddle 23 and the third saddle 24 are sliding saddles. The second saddle 23 and the third saddle 24 each support the tank 11 so that it can slide in the axial direction Da. Each of the second saddle 23 and the third saddle 24 includes a base member 231 fixed to the hull 2, a hull-side block member 232, and a tank-side block member 233.

[0027] The base member 231 is fixed to the hull 2. The base member 231 has legs 231k extending downward. The base member 231 is made of, for example, metal and is fixed to the hull 2 ​​by welding or the like. A circular arc-shaped curved surface 231f that is recessed downward is formed on the upper surface of the base member 231. The base member 231 also has a pair of walls 231w that rise inward in the radial direction Dr from both sides of the curved surface 231f in the axial direction Da.

[0028] The hull block member 232 is fixed to the base member 231. In other words, the hull block member 232 is fixed to the hull 2 ​​via the base member 231. The hull block member 232 is provided along the curved surface 231f of the base member 231. When viewed from the axial direction Da, the hull block member 232 extends in a semicircular arc shape in the circumferential direction Dc along the curved surface 231f. Here, the hull block member 232 has a semicircular arc shape as a whole by arranging multiple block bodies 232b along the circumferential direction Dc.

[0029] The hull block member 232 is formed, for example, in a rectangular shape in a cross section perpendicular to the circumferential direction Dc. The hull block member 232 is provided on the curved surface 231f of the base member 231. The hull block member 232 is housed between a pair of wall portions 231w. In this way, the hull block member 232 is sandwiched between the pair of wall portions 231w and fixed so as not to move in the axial direction Da. The inner circumferential surface 232f of the hull block member 232 facing inward in the radial direction Dr has a radius of curvature when viewed in the axial direction Da that is larger than the radius of curvature of the outer circumferential surface of the tank block member 233 (described later).

[0030] The tank-side block member 233 is fixed to the outer peripheral surface of the tank 11. When viewed from the axial direction Da, the tank-side block member 233 extends in a semicircular arc shape in the circumferential direction Dc along the outer peripheral surface of the lower half of the tank 11. Here, the tank-side block member 233 has a semicircular arc shape as a whole, with multiple block bodies 232b arranged along the circumferential direction Dc. The tank-side block member 233 is fixed to the outer peripheral surface of the tank 11 with epoxy resin or the like.

[0031] The tank-side block member 233 is formed, for example, in a rectangular shape in a cross section perpendicular to the circumferential direction Dc. A pair of walls 11w are provided on the outer peripheral surface of the tank 11. The pair of walls 11w are provided on both sides of the tank-side block member 233 in the axial direction Da. Each wall 11w protrudes outward in the radial direction Dr from the outer peripheral surface of the tank 11.

[0032] The tank-side block member 233 is disposed radially inward of the hull-side block member 232. The tank-side block member 233 is provided between the pair of wall portions 11w, and is thereby fixed to the tank 11 so as not to be displaceable in the axial direction Da.

[0033] The hull block member 232 and the tank block member 233 face each other in the radial direction Dr. The tank block member 233 is slidable in the axial direction Da relative to the hull block member 232. In order to reduce friction between the tank block member 233 and the hull block member 232, a sliding plate 235 made of, for example, stainless steel may be sandwiched between the tank block member 233 and the hull block member 232.

[0034] The tank side block member 233 is slidable in the axial direction Da relative to the hull side block member 232, and therefore the tank 11 is supported by the second saddle 23 so as to be slidable in the axial direction Da.

[0035] (Effects) In the ship 1 of the first embodiment, the tank support portion 20A supporting the tank 11 includes a first saddle 22, which is a fixed saddle, and a second saddle 23 and a third saddle 24, which are multiple sliding saddles. That is, the tank support portion 20A has at least three saddles 21 (22, 23, 24). This reduces the load of the tank 11 acting on each saddle 21 compared to when the tank 11 is supported only by the first saddle 22, which is a fixed saddle, and the second saddle 23, which is a sliding saddle. Furthermore, the reaction force acting on the tank 11 from each saddle 21 (22, 23, 24) is also reduced, thereby reducing the need to increase the strength of the tank 11 to resist the stress acting on the tank 11 due to the reaction force from the saddles 21. This reduces the weight of the tank 11, the cost of materials, and the like, and prevents the tank 11 from becoming too large and preventing it from being unable to store materials with a high specific gravity. As a result, it is possible to provide a ship 1 that reduces the reaction force from the saddle 21 and can accommodate larger tanks 11 and the storage of materials with high specific gravity.

[0036] (Variation of the First Embodiment) In the first embodiment, the tank support portion 20A includes the first saddle 22, the second saddle 23, and the third saddle 24. However, four or more saddles may be provided. In the first embodiment, the sliding saddles, the second saddle 23 and the third saddle 24, are disposed at successively greater distances in the axial direction Da from the fixed saddle (first saddle 22). In such a case, the coefficient of friction between the hull block member 232 and the tank block member 233 may be reduced as the sliding saddle is spaced further from the fixed saddle (first saddle 22). Furthermore, the third saddle 24 as shown in the first embodiment may be added to a tank 11 that is supported only by the first saddle 22 (fixed saddle) and the second saddle 23 (sliding saddle).

[0037] Second Embodiment Next, a second embodiment of a ship according to the present disclosure will be described. In the second embodiment described below, only the configuration of the tank support portion differs from the first embodiment. Therefore, the same parts as those in the first embodiment will be denoted by the same reference numerals and will not be described again. Figure 7 is a cross-sectional view showing a sliding saddle according to the second embodiment of the present disclosure. As shown in Figures 1 and 2 , in the tank equipment 10 of the ship 1 according to this embodiment, the tank support portion 20B includes a first saddle 22 (fixed saddle), a second saddle 23 (sliding saddle), and a third saddle 25 as the multiple saddles 21.

[0038] 7 , the third saddle 25 in the second embodiment is a sliding saddle. The sliding saddle 25 supports the tank 11 so that it can slide in the axial direction Da. The third saddle 25 includes a base member 251 fixed to the hull 2, a hull-side block member 252, and a tank-side block member (block member) 253.

[0039] The base member 251 in this second embodiment has a configuration similar to that of the base member 231 in the first embodiment. The hull block member 252 has a configuration similar to that of the hull block member 232 in the first embodiment. The tank block member 253 is fixed to the outer peripheral surface of the tank 11. When viewed from the axial direction Da, the tank block member 253 extends in a semicircular arc shape in the circumferential direction Dc along the outer peripheral surface of the lower half of the tank 11.

[0040] In this second embodiment, the elastic modulus of at least one of the tank-side block member 253 and the hull-side block member 252 of the third saddle 25 is smaller than the elastic modulus of the fixed block member 222 of the first saddle 22 and the tank-side block member 233 and the hull-side block member 232 of the second saddle 23. For this reason, in this second embodiment, the width W3 in the axial direction Da of the tank-side block member 253 is made smaller than the width W1 of the fixed block member 222 (see FIG. 4) and the width W2 of the tank-side block member 233 (see FIG. 6). Note that the width in the axial direction Da of the hull-side block member 252 may also be smaller than the width W1 of the fixed block member 222 (see FIG. 4) and the width of the hull-side block member 232.

[0041] (Effects) In the vessel 1 of the second embodiment, among the multiple saddles 21 (first saddle 22, second saddle 23, third saddle 25), the elastic modulus of the tank-side block member 253 of one third saddle 25 is set to be smaller than the elastic modulus of the block members 222, 233 of the other first saddle 22 and second saddle 23. When the tank 11 is supported by three or more saddles 21, when the load of the tank 11 acts on all of the multiple saddles 21, the load of the tank 11 does not act in an evenly distributed manner on the multiple saddles 21, and the load may act more concentratedly on at least one third saddle 25 of the multiple saddles 21 than on the other first saddles 22 and second saddles 23. In this case, by making the elastic modulus of the tank-side block member 253 of the third saddle 25, on which the load acts in a concentrated manner, smaller than that of the block members 222 and 233 of the first saddle 22 and the second saddle 23, this tank-side block member 253 elastically deforms greatly in response to the concentrated load. In this way, the tank-side block member 253 of the third saddle 25, which has a small elastic modulus, elastically deforms in response to the concentrated load, thereby equalizing the distribution of the load of the tank 11 acting among the multiple saddles 21. This makes it possible to prevent the reaction force acting from the saddle 21 on the tank 11 from becoming too large at a specific location on the tank 11.

[0042] Furthermore, by making the width W3 in the axial direction Da of the tank-side block member 253 of the third saddle 25 smaller than the widths W1 and W2 of the block members 222 and 233 of the other first saddle 22 and second saddle 23, the elastic modulus of the tank-side block member 253 becomes smaller than the elastic modulus of the block members 222 and 233 of the other first saddle 22 and second saddle 23. As a result, the distribution of the load of the tank 11 acting on the multiple saddles 21 can be easily equalized simply by adjusting the width in the axial direction Da of the tank-side block member 253.

[0043] Furthermore, in the ship 1 of the second embodiment, similarly to the first embodiment, the tank support part 20B that supports the tank 11 is provided with multiple saddles 21, including a first saddle 22 which is a fixed saddle and multiple sliding saddles, a second saddle 23 and a third saddle 25, thereby reducing the reaction force from the saddles 21 and making it possible to provide a ship 1 that can accommodate larger tanks 11 and the storage of materials with high specific gravity.

[0044] (First Modification of Second Embodiment) In the second embodiment described above, the width W3 in the axial direction Da of the tank-side block member 253 was reduced to make the elastic modulus of the tank-side block member 253 of the third saddle 25 smaller than the elastic modulus of the block members 222 and 233 of the other first saddle 22 and second saddle 23. However, this is not limited to this. FIG. 8 is a cross-sectional view showing a sliding saddle according to a first modification of the second embodiment of the present disclosure. For example, as shown in FIG. 8 , the thickness H3 in the radial direction Dr of the hull-side block member 252 and the tank-side block member 253B of the third saddle 25 may be greater than the thicknesses H1 and H2 of the block members 222, 232, and 233 of the other first saddle 22 and second saddle 23. In this way, the thickness H3 in the radial direction Dr may be made greater than the thicknesses H1 and H2 by simply increasing the distance between the curved surface 231f of the third saddle 25 and the outer circumferential surface of the tank. 8 illustrates an example in which the thickness H3 is increased by increasing the radial thickness Dr of the tank-side block member 253B, but it is also possible to increase the thickness of at least one of the hull-side block member 252 and the tank-side block member 253B. This also makes it possible to make the elastic modulus of the third saddle 25 smaller than the elastic modulus of the first saddle 22 and the second saddle 23.

[0045] According to this modified example of the second embodiment, simply by adjusting the thickness H3, the elastic modulus of the third saddle 25 becomes smaller than the elastic modulus of the other first saddle 22 and second saddle 23, so that the distribution of the load of the tank 11 acting on the multiple saddles 21 can be easily equalized.

[0046] (Second Modification of Second Embodiment) As a second modification of the second embodiment, the Young's modulus of the material forming the hull-side block member 252 and the tank-side block member 253 of the third saddle 25 may be smaller than the Young's modulus of the material forming the block members 222, 232, and 233 of the other first saddle 22 and second saddle 23. This also makes it possible to make the elastic modulus of the third saddle 25 smaller than the elastic modulus of the other first saddle 22 and second saddle 23. To make the Young's modulus of the material forming the tank-side block member 253 smaller than the Young's modulus of the material forming the block members 222, 232, and 233 of the other first saddle 22 and second saddle 23, when the other block members 222 and 233 of the other first saddle 22 and second saddle 23 are formed of, for example, laminated wood, phenolic laminated wood may be used as the material forming the tank-side block member 253.

[0047] According to the second modification of the second embodiment, by making the Young's modulus of the material forming the hull-side block member 252 and the tank-side block member 253 of one third saddle 25 smaller than the Young's modulus of the material forming the block members 222 and 233 of the other first saddle 22 and second saddle 23, the elastic modulus of the tank-side block member 253 made of a material with a smaller Young's modulus becomes smaller than the elastic modulus of the block members 222 and 233 of the other first saddle 22 and second saddle 23. In this way, simply by adjusting the Young's modulus of the material forming the tank-side block member 253, the distribution of the load of the tank 11 acting on the multiple saddles 21 can be easily equalized.

[0048] In the second variant of the second embodiment, the Young's modulus of the material forming the hull-side block member 252 and the tank-side block member 253 of the third saddle 25 is set to be smaller than the Young's modulus of the material forming the other block members 222 and 233 of the first saddle 22 and the second saddle 23. However, the Young's modulus of the material forming at least one of the hull-side block member 252 and the tank-side block member 253 of the third saddle 25 may also be smaller than the Young's modulus of the material forming the other block members 222 and 233 of the first saddle 22 and the second saddle 23.

[0049] In the second embodiment and each of the modified examples of the second embodiment described above, the elastic modulus of the hull-side block member 252 and the tank-side block member 253 of the third saddle 25, which is a sliding saddle, is small. However, the elastic modulus of the block member 222 of the first saddle 22 or the block members 232 and 233 of the second saddle 23 may be large.

[0050] Third Embodiment Next, a third embodiment of a ship according to the present disclosure will be described. In the third embodiment described below, only the configuration of the tank support portion differs from the first and second embodiments. Therefore, the same parts as those in the first and second embodiments will be denoted by the same reference numerals and will not be described again. Figure 9 is a view of a sliding saddle according to a third embodiment of the present disclosure, as viewed from the axial direction. As shown in Figure 1, in the tank equipment 10 of the ship 1 according to this embodiment, the tank support portion 20C includes a first saddle 22 (fixed saddle), a second saddle 23 (sliding saddle), and a third saddle 26 as the multiple saddles 21.

[0051] As shown in Fig. 9 , in this third embodiment, the third saddle 26 is a sliding saddle. The third saddle 26 includes a pair of saddle members 260A, 260B spaced apart in a horizontal plane on both sides of the tank 11 in the radial direction Dr. The saddle members 260A, 260B illustrated in this third embodiment are spaced apart in the horizontal direction when viewed from the axial direction Da of the tank 11. The saddle members 260A, 260B illustrated in the third embodiment are arranged symmetrically with respect to the axis O. Each of the saddle members 260A, 260B includes a base member 261 fixed to the hull 2, a hull-side block member 262, and a tank-side block member (block member) 263.

[0052] In this third embodiment, the tank-side block member 263 is fixed to the outer peripheral surface of the tank 11. The tank-side block members 263 are arranged spaced apart on both sides of the tank 11 in the radial direction Dr. In other words, the tank-side block members 263 are arranged spaced apart in the horizontal direction in the lower half of the outer peripheral surface of the tank 11 when viewed from the axial direction Da of the tank 11. The tank-side block member 263 in this third embodiment is formed in an arc shape extending along the outer peripheral surface of the upper part of the lower half of the tank 11 when viewed from the axial direction Da.

[0053] The hull block member 262 is fixed to the base member 261. When viewed from the axial direction Da, the hull block member 262 is disposed in a region that overlaps the position of the tank block member 263 in the circumferential direction Dc, and extends in an arc shape in the circumferential direction Dc.

[0054] The tank-side block member 263 and the hull-side block member 262 are preferably arranged such that the downward inclination angle θ in the circumferential direction Dc about the axis O is within a range of, for example, 5 to 45° with respect to a horizontal plane including the axis O. In addition, the hull-side block member 262 is preferably spaced apart from the tank-side block member 263 by, for example, approximately 1 to 50 mm in the radial direction Dr.

[0055] (Operation and Effect) In the ship 1 of the third embodiment, of the second saddles 23 and the third saddles 26, which are multiple sliding saddles, one third saddle 26 includes a pair of saddle members 260A, 260B arranged at a distance on both sides of the radial direction Dr of the tank 11. As a result, under normal circumstances, the tank 11 is supported by the first saddle 22, which is a fixed saddle, and the second saddle 23, which is a sliding saddle. When the tank 11 is displaced in the radial direction Dr by a predetermined distance or more, the third saddle 26, which includes the pair of saddle members 260A, 260B, in addition to the first saddle 22, which is a fixed saddle, and the second saddle 23, which is a sliding saddle, supports the lower half of the tank 11 from below. As a result, when the tank 11 is displaced in a direction intersecting the axis O due to rocking of the ship 1, the load of the tank 11 acting on one saddle 21 can be reduced.

[0056] <Fourth Embodiment> Next, a fourth embodiment of a ship according to the present disclosure will be described. In the fourth embodiment described below, only the configuration of a tank support portion 20D differs from the first embodiment. Therefore, the same parts as in the first embodiment will be denoted by the same reference numerals and will not be described again. Figure 10 is a cross-sectional view showing a sliding saddle according to the fourth embodiment. As shown in Figure 1, in the tank equipment 10 of the ship 1 according to this embodiment, the tank support portion 20D includes a first saddle 22 (fixed saddle), a second saddle 23 (sliding saddle), and a third saddle 27 as the multiple saddles 21.

[0057] The third saddle 27 of the fourth embodiment is a sliding saddle. The sliding saddle supports the tank 11 so that the tank 11 can slide in the axial direction Da. The third saddle 27 includes a base member 271 fixed to the hull 2, a hull-side block member 272, and a tank-side block member 273.

[0058] The base member 271 of this fourth embodiment has a configuration similar to that of the base member 231 of the first embodiment. Furthermore, the hull block member 272 has a configuration similar to that of the hull block member 232 of the first embodiment. The tank block member 273 is fixed to the outer peripheral surface of the tank 11. When viewed from the axial direction Da, the tank block member 273 extends in a semicircular arc shape in the circumferential direction Dc along the outer peripheral surface of the lower half of the tank 11.

[0059] In this fourth embodiment, the tank side block member 273 and the hull side block member 272 are spaced apart in the radial direction Dr of the tank 11. The distance S between the tank side block member 273 and the hull side block member 272 in the radial direction Dr is preferably about 1 to 50 mm, for example.

[0060] (Operation and Effect) In the ship 1 of the fourth embodiment, of the second saddles 23 and the third saddles 27, which are multiple sliding saddles, the tank-side block member 273 and the hull-side block member 272 of at least one sliding saddle, the third saddle 27, are provided spaced apart in the radial direction Dr of the tank 11. As a result, under normal circumstances, the tank 11 is supported by the first saddle 22, which is one fixed saddle, and at least one sliding saddle, the second saddle 23. If the amount of stored material in the tank 11 increases and the tank 11 is displaced downward, for example, the tank-side block member 273 and the hull-side block member 272 come into contact with each other at the third saddle 27, which is at least one sliding saddle, and support the weight of the tank 11 from below. As a result, in addition to the first saddle 22 which is a fixed saddle and the second saddle 23 which is a sliding saddle, the third saddle 27 which is a sliding saddle in contact with the tank side block member 273 and the hull side block member 272 supports the tank 11 from below, thereby reducing the load of the tank 11 acting on the one saddle 21.

[0061] Other Embodiments Although the embodiments of the present disclosure have been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design modifications and the like are also included within the scope of the present disclosure. In the above embodiment, the first saddle 22 disposed on one side of the tank 11 in the axial direction Da is a fixed saddle, and the second saddle 23 disposed on the other side of the tank 11 in the axial direction Da and the third saddle 27 disposed in the middle of the tank 11 in the axial direction Da are sliding saddles. However, this is not limited to this. For example, the second saddle 23 may be a fixed saddle, and the first saddle 22 and the third saddle 27 may be sliding saddles. Furthermore, for example, the third saddle 27 may be a fixed saddle, and the first saddle 22 and the second saddle 23 may be sliding saddles. Furthermore, although the tank 11 is cylindrical, the tank 11 may be a bilobe type, a trilobe type, or the like.

[0062] <Additional Notes> The boat 1 described in each embodiment can be understood, for example, as follows.

[0063] (1) A ship 1 according to a first aspect comprises a hull 2, a cylindrical tank 11 provided on the hull 2 ​​and having an axis O extending horizontally, and tank support portions 20A, 20B provided on the hull 2 ​​and supporting the tank 11, wherein the tank support portions 20A, 20B extend in the circumferential direction Dc along the outer peripheral surface of the lower part of the tank 11 and have a plurality of saddles 21 spaced apart in the axial direction Da along which the axis O extends, and the plurality of saddles 21 comprise one fixed saddle 22 that supports the tank 11 so as to be immovable in the axial direction Da, and a plurality of sliding saddles 23 to 27 that support the tank 11 so as to be slidable in the axial direction Da.

[0064] As a result, compared to when the tank 11 is supported by one fixed saddle 22 and one sliding saddle 23, i.e., two saddles 21, the load of the tank 11 acting on one saddle 21 is smaller, and the reaction force acting on the tank 11 from the saddle 21 is also smaller, thereby reducing the need to increase the strength of the tank 11 to resist the stress acting on the tank 11 due to the reaction force from the saddle 21. Therefore, it is possible to suppress an increase in the tank 11's own weight, an increase in material costs, etc., and to suppress an increase in the size of the tank 11 and an obstruction to the storage of materials with a high specific gravity. As a result, it is possible to provide a ship 1 that reduces the reaction force from the saddle 21 and can accommodate an increase in the size of the tank 11, the storage of materials with a high specific gravity, etc.

[0065] (2) The vessel 1 according to the second aspect is the vessel 1 of (1), wherein the plurality of saddles 21 comprise a base member 251 fixed to the hull 2 ​​and a block member 253 arranged between the base member 251 and the outer peripheral surface of the tank 11, and the elastic modulus of the block member 253 of at least one of the plurality of saddles 21 is smaller than the elastic modulus of the block members 222, 233 of the other saddles 22, 23.

[0066] When the tank 11 is supported by three or more saddles 21, when the load of the tank 11 acts on all of the saddles 21, the load of the tank 11 is not evenly distributed across the saddles 21, and the load may act more concentratedly on at least one saddle 25 of the saddles 21 than on the other saddles 22, 23. However, if the elastic modulus of the saddle 25 on which the concentrated load acts is smaller than that of the other saddles 22, 23, the saddle 25 with the smaller elastic modulus elastically deforms more in response to the concentrated load than the other saddles 22, 23. In this way, the block member 253 of the saddle 25 with the smaller elastic modulus elastically deforms in response to the concentrated load, thereby equalizing the distribution of the load of the tank 11 acting among the multiple saddles 21. This makes it possible to prevent the reaction force acting from the saddle 21 on the tank 11 from becoming too large at a specific point on the tank 11.

[0067] (3) The vessel 1 according to the third aspect is the vessel 1 of (2), wherein the block member 253 of at least one of the saddles 25 among the plurality of saddles 21 has a smaller width W3 in the axial direction Da of the tank 11 than the block members 222, 232, 233 of the other saddles 22, 23.

[0068] As a result, the elastic modulus of the block member 253 having a smaller width W3 in the axial direction Da is smaller than the elastic modulus of the block members 222, 232, and 233 of the other saddles 22 and 23. As a result, simply by adjusting the width of the block member 253 in the axial direction Da, the distribution of the load of the tank 11 acting on the multiple saddles 21 can be easily equalized.

[0069] (4) The vessel 1 according to the fourth aspect is the vessel 1 according to (2) or (3), wherein the block member 253 of at least one of the saddles 25 among the plurality of saddles 21 has a thickness H3 in the radial direction Dr of the tank 11 that is larger than the block members 222, 232, 233 of the other saddles 22, 23.

[0070] As a result, the elastic modulus of the block member 253 is smaller than the elastic modulus of the block members 222, 232, and 233 of the other saddles 22 and 23. As a result, by simply adjusting the thickness H3 of the block member 253 in the radial direction Dr, the distribution of the load of the tank 11 acting on the multiple saddles 21 can be easily equalized.

[0071] (5) The vessel 1 according to the fifth aspect is any one of the vessels 1 of (2) to (4), in which the block member of at least one of the saddles 25 among the plurality of saddles 21 is formed of a material having a smaller Young's modulus than the block members 222, 232, 233 of the other saddles 22, 23.

[0072] As a result, the elastic modulus of the block member 253 is smaller than the elastic modulus of the block members 222 and 233 of the other saddles 22 and 23. As a result, by simply adjusting the Young's modulus of the material forming the block member 253, the distribution of the load of the tank 11 acting on the multiple saddles 21 can be easily made uniform.

[0073] (6) The vessel 1 according to the sixth aspect is any one of the vessels 1 of (1) to (5), and at least one of the sliding saddles 23, 26 is provided with a pair of saddle members 260A, 260B that are spaced apart on both sides of the radial direction Dr of the tank 11 and support the lower half of the tank 11 from below when the tank 11 is displaced in the radial direction Dr by more than a predetermined dimension.

[0074] As a result, under normal circumstances, the tank 11 is supported by one fixed saddle 22 and one sliding saddle 23, and when the tank 11 is displaced in the radial direction Dr by more than a predetermined distance, the sliding saddle 26 having a pair of saddle members 260A, 260B in addition to one fixed saddle 22 and one sliding saddle 23 supports the lower half of the tank 11 from below. As a result, when the tank 11 is displaced in a direction intersecting the axis O due to pitching of the ship 1, the load of the tank 11 acting on one saddle 21 can be reduced.

[0075] (7) The ship 1 according to the seventh aspect is any one of the ships 1 of (1) to (6), and at least one of the sliding saddles 27 among the plurality of sliding saddles 23, 27 comprises a base member 271 fixed to the hull 2, a tank side block member 273 fixed to the outer peripheral surface of the tank 11, and a hull side block member 272 fixed to the base member 271, and the tank side block member 273 and the hull side block member 272 are arranged at a distance from each other in the radial direction Dr of the tank 11.

[0076] As a result, under normal circumstances, the tank 11 is supported by one fixed saddle 22 and at least one sliding saddle 23. If the amount of stored material in the tank 11 increases and the tank 11 is displaced downward, the tank-side block member 273 and the hull-side block member 272 come into contact with each other at at least one sliding saddle 27, supporting the weight of the tank 11 from below. As a result, in addition to one fixed saddle 22 and one sliding saddle 23, the sliding saddle 27, in which the tank-side block member 273 and the hull-side block member 272 come into contact with each other, supports the tank 11 from below, thereby reducing the load of the tank 11 acting on one saddle 21.

[0077] According to the ship of the present disclosure, it is possible to provide a ship that reduces the reaction force from the saddle and can accommodate larger tanks and the storage of materials with high specific gravity.

[0078] DESCRIPTION OF SYMBOLS 1 Ship 2 Hull 2a Bow 2b Stern 3A, 3B Side 4 Ship bottom 5 Upper deck 7 Superstructure 10 Tank equipment 11 Tank 11a Cylindrical portion 11b Head plate portion 11t Protrusion 11w Wall portion 20A to 20D Tank support portion 22 First saddle (fixed saddle, saddle) 23 Second saddle (sliding saddle, saddle) 24 to 27 Third saddle (sliding saddle, saddle) 221 Base member 221f Curved surface 221k Leg portion 221w Wall portion 222 Fixed block member (block member) 222b Block body 222s Slit 231 Base member 231f Curved surface 231k Leg portion 231w Wall portion 232 Hull side block member (block member) 232b Block body 232f Inner peripheral surface 233 Tank side block member (block member) 235 Sliding plate 251, 261, 271 Base member 252, 262, 272 Hull side block member 253, 253B, 263, 273 Tank side block member (block member) 260A, 260B Saddle member

Claims

1. A ship comprising: a hull; a cylindrical tank provided on the hull and having an axis extending horizontally; and a tank support portion provided on the hull and supporting the tank, wherein the tank support portion extends circumferentially along the outer circumferential surface of the lower part of the tank and has a plurality of saddles spaced apart in the axial direction along which the axis extends, and the plurality of saddles include one fixed saddle that supports the tank so that it cannot move in the axial direction, and a plurality of sliding saddles that support the tank so that it can slide in the axial direction.

2. The ship described in claim 1, wherein the plurality of saddles comprise a base member fixed to the hull and a block member disposed between the base member and the outer peripheral surface of the tank, and the elastic modulus of the block member of at least one of the plurality of saddles is smaller than the elastic modulus of the block members of the other saddles.

3. The ship according to claim 2, wherein the block member of at least one of the plurality of saddles has a smaller width in the axial direction of the tank than the block members of the other saddles.

4. A ship according to claim 2, wherein the block member of at least one of the plurality of saddles has a thickness in the radial direction of the tank greater than the block members of the other saddles.

5. A vessel as set forth in claim 2, wherein the block member of at least one of the plurality of saddles is formed of a material having a smaller Young's modulus than the block members of the other saddles.

6. The ship as described in claim 1, wherein at least one of the plurality of sliding saddles comprises a pair of saddle members arranged spaced apart on both radial sides of the tank and supporting the lower half of the tank from below when the tank is displaced radially by more than a predetermined dimension.

7. The ship described in claim 1, wherein at least one of the plurality of sliding saddles comprises a base member fixed to the hull, a tank side block member fixed to the outer peripheral surface of the tank, and a hull side block member fixed to the base member, and the tank side block member and the hull side block member are spaced apart in the radial direction of the tank.

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