Vessel

Abstract

To provide a vessel capable of handling enlargement of a tank and retention of retained matter with great specific gravity by reducing reaction force from saddles.SOLUTION: A vessel includes: a hull; a cylindrical tank provided in the full and having an axial line extending in the horizontal direction; and a tank support unit provided in the hull and supporting the tank. The tank support unit has a plurality of saddles extending in a peripheral direction along an outer periphery surface in a bottom portion of the tank and provided so as to be separated in an axial direction where an axis line extends, and includes one fixed saddle for supporting the tank to be incapable of moving in the axial direction, and a plurality of slide saddles for supporting the tank to be capable of sliding in the axial direction, as the plurality of saddles.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a ship.

Background Art

[0002] Patent Document 1 discloses a configuration in which a cylindrical tank capable of storing LNG fuel having an axis extending in the horizontal direction is supported by a pair of saddles arranged at intervals in the axial direction.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, for example, when trying to increase the size of the tank, the weight of the stored material in the tank increases, so the load acting on the pair of saddles from the tank increases. Also, even when storing a stored material with a high specific gravity in the tank, the load acting on the pair of saddles from the tank increases. Thus, when the load acting on the pair of saddles from the tank increases, the reaction force acting on the tank from the saddles also increases. On the other hand, in order to resist the stress acting on the tank due to the reaction force from the saddles, if the strength of the tank is increased, it will lead to an increase in the self-weight of the tank and an increase in material costs. Therefore, with the configuration described in Patent Document 1, there is a possibility of hindering the enlargement of the tank and the storage of stored materials with a high specific gravity.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to provide a ship that reduces the reaction force from the saddles and enables coping with enlargement of the tank, storage of stored materials with a high specific gravity, and the like.

Means for Solving the Problems

[0006] To solve the above problems, a ship according to the present disclosure includes a hull, a tank, and a tank support. The tank is provided in the hull and has a cylindrical shape with an axis extending in the horizontal direction. The tank support is provided in the hull and supports the tank. The tank support 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 at intervals in the axial direction in which the axis extends. As the plurality of saddles, one fixed saddle and a plurality of sliding saddles are provided. One of the fixed saddles supports the tank so as not to move in the axial direction. The plurality of sliding saddles support the tank so as to be slidable in the axial direction.

Effect of the Invention

[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 enables the enlargement of the tank and the storage of stored substances with a large specific gravity.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0009] <First Embodiment> Hereinafter, a ship according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 10. (Overall Configuration of the Ship) As shown in FIG. 1, the ship 1 of the present embodiment includes at least a hull 2 and a tank facility 10. Examples of the ship 1 include tankers for transporting liquefied gases such as carbon dioxide, liquefied natural gas (LNG), and ammonia, cargo ships, ferries, RORO ships (Roll-on / Roll-off ships), PCTCs (Pure Car & Truck Carriers), passenger ships, and observation / survey ships.

[0010] (Configuration of the Hull) The hull 2 has a pair of side shells 3A and 3B forming its outer shell, a bottom 4, and an upper deck 5. The side shells 3A and 3B have a pair of side shell plates forming the left and right side shells respectively. The bottom 4 has a bottom shell plate connecting these side shells 3A and 3B. An upper structure 7 having a living area is formed on the upper deck 5 of the hull 2, for example, on the side of the stern 2b.

[0011] (Configuration of the Tank Facility) FIG. 2 is a side view showing a tank and a tank support portion according to an embodiment of the present disclosure. As shown in FIGS. 1 and 2, the tank facility 10 includes at least a tank 11 and a tank support portion 20A.

[0012] The tank 11 can store liquid inside it. 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 the present embodiment is accommodated, for example, inside the hull 2. The tank 11 of the present embodiment may store, for example, a liquid as fuel for combustors such as main engines, auxiliary machines, and engines for generators (none of which are shown) accommodated inside the hull 2.

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

[0014] As shown in FIG. 2, each tank 11 is a cylindrical container having an axis O extending in the horizontal direction. In this first embodiment, the axis O of each tank 11 extends in the fore-and-aft direction FA. Each tank 11 includes a cylindrical portion 11a and a mirror plate portion 11b.

[0015] The cylindrical portion 11a is provided at the middle portion of the tank 11 in the fore-and-aft direction FA and is formed in a continuous cylindrical shape in the fore-and-aft direction FA. The cylindrical portion 11a forms a circle when viewed from the axial direction Da (fore-and-aft direction FA) in which the axis O extends. The diameter of the cylindrical portion 11a in this first embodiment is constant in the axial direction Da.

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

[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 capable of supporting 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, namely, 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 provided at intervals in the axial direction Da. The first saddle 22 is provided, for example, on one side with respect to the central portion of the tank 11 in the axial direction Da. The first saddle 22 illustrated in the present embodiment is provided on the stern 2b side in the fore-and-aft direction FA. The second saddle 23 is provided at the central portion 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 with respect to the central portion 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-and-aft direction FA.

[0019] FIG. 3 is a view of the fixed saddle according to the embodiment of the present disclosure as viewed from the axial direction. FIG. 4 is a cross-sectional view taken along the line A-A of FIG. 3. In this first embodiment, the first saddle 22 is a fixed saddle. As shown in FIGS. 3 and 4, the first saddle 22, which is a fixed saddle, supports the tank 11 so as not to be movable 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 leg portions 221k extending downward. The base member 221 is made of, for example, metal and is fixed to the hull 2 by welding or the like. An arc-shaped curved surface 221f that is recessed downward is formed on the upper surface of the base member 221. Further, the base member 221 has a pair of wall portions 221w that rise upward from both axial ends of the curved surface 221f toward the inside in the radial direction Dr centered on the axis O of the tank 11. In the base member 221, the curved surface 221f facing the inside in the radial direction Dr has a radius of curvature when viewed from the axial direction Da that is larger than the radius of curvature of the outer peripheral surface of the fixed block member 222 described later. A filler (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 semi-circular 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 forms a semi-circular arc shape as a whole by arranging a plurality of 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-sectional view 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 accommodated between a pair of wall portions 221w. Thereby, the fixed block member 222 is fixed in a non-displaceable manner in the axial direction Da by being sandwiched between the pair of wall portions 221w.

[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 an epoxy resin or the like.

[0024] The fixed block member 222 has a slit 222s that is recessed radially outward from the inner peripheral surface in the middle part of the axial direction Da. On the outer peripheral surface of the tank 11, a protrusion 11t that is inserted into the slit 222s is provided. The protrusion 11t protrudes radially outward from the outer peripheral 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 in a non-displaceable manner in the axial direction Da. Here, the slit 222s and the protrusion 11t may extend in the circumferential direction Dc. A plurality of sets of the slit 222s and the protrusion 11t may be provided at intervals in the circumferential direction Dc.

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

[0026] FIG. 5 is a view of the sliding saddle according to an embodiment of the present disclosure as seen from the axial direction. FIG. 6 is a cross-sectional view taken along the line B-B of FIG. 5. As shown in FIGS. 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 slidably support the tank 11 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. An arcuate curved surface 231f that is recessed downward is formed on the upper surface of the base member 231. Further, the base member 231 has a pair of wall portions 231w that rise upward from both sides in the axial direction Da toward the inside in the radial direction Dr with respect to the curved surface 231f.

[0028] The hull-side block member 232 is fixed to the base member 231. That is, the hull-side block member 232 is fixed to the hull 2 via the base member 231. The hull-side block member 232 is provided along the curved surface 231f of the base member 231. When viewed from the axial direction Da, the hull-side block member 232 extends in a semi-circular arc shape in the circumferential direction Dc along the curved surface 231f. Here, the hull-side block member 232 forms a semi-circular arc shape as a whole by arranging a plurality of block bodies 232b along the circumferential direction Dc.

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

[0030] The tank-side block member 233 is fixed to the outer peripheral surface of the tank 11. The tank-side block member 233 extends in a semi-circular arc shape in the circumferential direction Dc along the outer peripheral surface of the lower half of the tank 11 when viewed from the axial direction Da. Here, the tank-side block member 233 forms a semi-circular arc shape as a whole by arranging a plurality of block bodies 232b along the circumferential direction Dc. The tank-side block member 233 is fixed to the outer peripheral surface of the tank 11 with an epoxy resin or the like.

[0031] The tank-side block member 233 is formed, for example, in a rectangular shape in a cross-sectional view perpendicular to the circumferential direction Dc. A pair of wall portions 11w are provided on the outer peripheral surface of the tank 11. The pair of wall portions 11w are provided on both sides in the axial direction Da with respect to the tank-side block member 233. Each wall portion 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 arranged on the inner side in the radial direction Dr with respect to the hull-side block member 232. The tank-side block member 233 is provided between a pair of wall portions 11w, so that it is fixed to the tank 11 so as not to be displaced in the axial direction Da.

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

[0034] Since the tank side block member 233 is slidable in the axial direction Da with respect to the hull side block member 232, the tank 11 is slidably supported in the axial direction Da by the second saddle 23.

[0035] (Function and effect) In the ship 1 of the first embodiment, as a plurality of saddles of the tank support portion 20A that supports the tank 11, there are provided a first saddle 22 that is a single fixed saddle, a plurality of sliding saddles that are second saddles 23, and a third saddle 24. That is, the tank support portion 20A has at least three saddles 21 (22, 23, 24). Thereby, compared with the case where the tank 11 is supported only by the first saddle 22 that is a fixed saddle and the second saddle 23 that is a sliding saddle, the load of the tank 11 acting on one saddle 21 becomes smaller. And since the reaction force acting on the tank 11 from each saddle 21 (22, 23, 24) also becomes smaller, the necessity of increasing the strength of the tank 11 to resist the stress acting on the tank 11 due to the reaction force from the saddle 21 is suppressed. Therefore, it is possible to suppress an increase in the dead weight of the tank 11, an increase in material cost, etc., and it is possible to suppress an obstacle to the enlargement of the tank 11 and the storage of a stored material having a large specific gravity. As a result, it is possible to provide a ship 1 that reduces the reaction force from the saddle 21 and enables coping with the enlargement of the tank 11, the storage of a stored material having a large specific gravity, etc.

[0036] (Modification of the first embodiment) In the above first embodiment, the tank support portion 20A is provided with the first saddle 22, the second saddle 23, and the third saddle 24. However, it may be provided with four or more saddles. Also, in the above first embodiment, with respect to the first saddle 22 which is a fixed saddle, the second saddle 23 and the third saddle 24 which are sliding saddles are sequentially spaced apart in the axial direction Da. In such a case, the friction coefficient between the hull side block member 232 and the tank side block member 233 may be made smaller for the sliding saddle with a larger separation distance from the fixed saddle (the first saddle 22). Furthermore, the third saddle 24 as shown in the above first embodiment may be additionally provided with respect to the tank 11 which was supported only by the first saddle 22 (fixed saddle) and the second saddle 23 (sliding saddle), for example.

[0037] <Second Embodiment> Next, a second embodiment of the ship according to the present disclosure will be described. In the second embodiment described below, only the configuration of the tank support portion is different from that of the first embodiment. Therefore, the same parts as those in the first embodiment will be denoted by the same reference numerals and described, and redundant descriptions will be omitted. FIG. 7 is a cross-sectional view showing a sliding saddle according to the second embodiment of the present disclosure. As shown in FIGS. 1 and 2, in the tank facility 10 of the ship 1 of the present embodiment, the tank support portion 20B includes, as a plurality of saddles 21, a first saddle 22 (fixed saddle), a second saddle 23 (sliding saddle), and a third saddle 25.

[0038] As shown in FIG. 7, the third saddle 25 in the second embodiment is a sliding saddle. The third saddle 25 which is a sliding saddle supports the tank 11 so as to be slidable 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 the same configuration as the base member 231 in the first embodiment. Also, the hull-side block member 252 has the same configuration as the hull-side block member 232 in the first embodiment. The tank-side block member 253 is fixed to the outer peripheral surface of the tank 11. When viewed from the axial direction Da, the tank-side block member 253 extends in a semi-circular 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 moduli of the fixed block member 222 of the other first saddle 22 and the tank-side block member 233 and the hull-side block member 232 of the second saddle 23. Therefore, in this second embodiment, the width W3 of the tank-side block member 253 in the axial direction Da is made smaller than the width W1 (see FIG. 4) of the fixed block member 222 and the width W2 (see FIG. 6) of the tank-side block member 233. Note that the width of the hull-side block member 252 in the axial direction Da may also be made smaller than the width W1 (see FIG. 4) of the fixed block member 222 and the width of the hull-side block member 232.

[0041] (Function and effect) In the ship 1 of the second embodiment, among the plurality of saddles 21 (the first saddle 22, the second saddle 23, the third saddle 25), the elastic modulus of the tank-side block member 253 of one third saddle 25 is made smaller than the elastic moduli 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 plurality of saddles 21, the load of the tank 11 is not evenly distributed and acts on the plurality of saddles 21, and for at least one third saddle 25 of the plurality of saddles 21, the load may act concentratedly rather than on the other first saddle 22 and second saddle 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 concentratedly smaller than the elastic moduli of the block members 222, 233 of the other first saddle 22 and second saddle 23, this tank-side block member 253 elastically deforms greatly according to the concentrated load. In this way, the load distribution of the tank 11 acting between the plurality of saddles 21 is equalized by the elastic deformation of the tank-side block member 253 of the third saddle 25 having a small elastic modulus according to the concentrated load. Thereby, it is possible to suppress an increase in the reaction force acting from the saddle 21 to the tank 11 at a specific location of 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, W2 of the block members 222, 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 moduli of the block members 222, 233 of the other first saddle 22 and second saddle 23. Thereby, it is possible to easily equalize the load distribution of the tank 11 acting on the plurality of saddles 21 only by adjusting the width of the tank-side block member 253 in the axial direction Da.

[0043] Further, in the ship 1 of the second embodiment, as in the first embodiment, as a plurality of saddles 21 of the tank support portion 20B that supports the tank 11, a first saddle 22 that is a single fixed saddle, a second saddle 23 that is a plurality of sliding saddles, and a third saddle 25 are provided. By doing so, it is possible to reduce the reaction force from the saddle 21 and provide a ship 1 that can cope with an increase in the size of the tank 11, storage of a stored substance having a large specific gravity, and the like.

[0044] (First Modification of the Second Embodiment) In the second embodiment, in order to make the elastic modulus of the tank-side block member 253 of the third saddle 25 smaller than the elastic moduli of the block members 222 and 233 of the other first saddle 22 and second saddle 23, the width W3 in the axial direction Da of the tank-side block member 253 is made smaller, but it 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 made larger than the thicknesses H1 and H2 of the block members 222, 232, and 233 of the other first saddle 22 and second saddle 23. When the thickness H3 in the radial direction Dr is made larger than the thicknesses H1 and H2 in this way, the distance between the curved surface 231f of the third saddle 25 and the outer peripheral surface of the tank may be increased. In FIG. 8, the case where the thickness H3 is increased by increasing the thickness in the radial direction Dr of the tank-side block member 253B is illustrated, but the thickness of at least one of the hull-side block member 252 and the tank-side block member 253B may be increased. Also by this, the elastic modulus of the third saddle 25 can be made smaller than the elastic moduli of the other first saddle 22 and second saddle 23.

[0045] According to this modification of the second embodiment, by only adjusting the thickness H3, the elastic modulus of the third saddle 25 becomes smaller than the elastic moduli of the other first saddle 22 and second saddle 23. Therefore, the distribution of the load of the tank 11 acting on the plurality of saddles 21 can be easily equalized.

[0046] (Second Modification Example of the Second Embodiment) Also, as a second modification example 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 made 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. By doing so, the elastic modulus of the third saddle 25 can also be made smaller than the elastic moduli 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 block members 222 and 233 of the other first saddle 22 and second saddle 23 are formed of, for example, laminated wood, a phenolic laminate may be adopted as the material forming the tank side block member 253.

[0047] According to the second modification example 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 small Young's modulus becomes smaller than the elastic moduli of the block members 222 and 233 of the other first saddle 22 and second saddle 23. Thereby, by only 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 plurality of saddles 21 can be easily equalized.

[0048] In the second modification example 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 made 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. However, the Young's modulus of at least one of the hull side block member 252 and the tank side block member 253 of the third saddle 25 may be made 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.

[0049] In the above-described second embodiment and each modification of the second embodiment, in the third saddle 25 which is a sliding saddle, the elastic modulus of the hull-side block member 252 and the tank-side block member 253 is reduced, but 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 increased.

[0050] <Third Embodiment> Next, a third embodiment of the ship according to the present disclosure will be described. In the third embodiment described below, only the configuration of the tank support part is different from that of the first embodiment and the second embodiment. Therefore, the same parts as those in the first embodiment and the second embodiment will be denoted by the same reference numerals and described, and redundant descriptions will be omitted. FIG. 9 is a view of the sliding saddle according to the third embodiment of the present disclosure as viewed from the axial direction. As shown in FIG. 1, in the tank facility 10 of the ship 1 of the present embodiment, the tank support part 20C includes, as a plurality of saddles 21, a first saddle 22 (fixed saddle), a second saddle 23 (sliding saddle), and a third saddle 26.

[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 and 260B that are spaced apart on both sides in the radial direction Dr of the tank 11 in the horizontal plane. The saddle members 260A and 260B illustrated in this third embodiment are arranged spaced apart in the horizontal direction when viewed from the axial direction Da of the tank 11. The saddle members 260A and 260B illustrated in the third embodiment are arranged symmetrically with respect to the axis O. Each of the saddle members 260A and 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 spaced apart on both sides in the radial direction Dr of the tank 11. In other words, the tank-side block members 263 are horizontally spaced apart 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 of 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-side block member 262 is fixed to the base member 261. When viewed from the axial direction Da, the hull-side block member 262 is disposed in a region overlapping the position of the tank-side 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 provided within a range where the downward inclination angle θ is, for example, 5 to 45° in the circumferential direction Dc around the axis O with respect to the horizontal plane including the axis O. Also, it is preferable to space the hull-side block member 262 apart from the tank-side block member 263 by about 1 mm to 50 mm in the radial direction Dr, for example.

[0055] (Function and Effect) In the ship 1 of the third embodiment described above, among the plurality of sliding saddles, i.e., the second saddle 23 and the third saddle 26, one third saddle 26 includes a pair of saddle members 260A and 260B that are spaced apart from each other on both sides in the radial direction Dr of the tank 11. Thus, normally, 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 by a predetermined dimension or more in the radial direction Dr, 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 26, which includes the pair of saddle members 260A and 260B, supports the lower half of the tank 11 from below. Thereby, when the tank 11 is displaced in a direction intersecting the axis O due to the 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 the ship according to the present disclosure will be described. In the fourth embodiment described below, only the configuration of the tank support portion 20D is different from that of the first embodiment. Therefore, the same reference numerals will be given to the same parts as those in the first embodiment and described, and redundant descriptions will be omitted. FIG. 10 is a cross-sectional view showing the sliding saddle according to the fourth embodiment of the present embodiment. As shown in FIG. 1, in the tank facility 10 of the ship 1 of the present embodiment, the tank support portion 20D includes, as a plurality of saddles 21, a first saddle 22 (fixed saddle), a second saddle 23 (sliding saddle), and a third saddle 27.

[0057] The third saddle 27 of this fourth embodiment is a sliding saddle. The third saddle 27, which is a sliding saddle, supports the tank 11 so as to be slidable 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 the same configuration as the base member 231 in the above-described first embodiment. Further, the hull-side block member 272 has the same configuration as the hull-side block member 232 in the above-described first embodiment. The tank-side block member 273 is fixed to the outer peripheral surface of the tank 11. When viewed from the axial direction Da, the tank-side block member 273 extends in a semi-circular arc shape in the circumferential direction Dc along the outer peripheral surface of the lower half of the tank 11.

[0059] The tank-side block member 273 and the hull-side block member 272 of this fourth embodiment are provided so as to be separated from each other in the radial direction Dr of the tank 11. The distance S by which the tank-side block member 273 and the hull-side block member 272 are separated in the radial direction Dr is preferably, for example, about 1 to 50 mm.

[0060] (Function and effect) In the ship 1 of the above-described fourth embodiment, among the plurality of sliding saddles, i.e., the second saddle 23 and the third saddle 27, the tank-side block member 273 and the hull-side block member 272 of at least one sliding saddle, i.e., the third saddle 27, are provided so as to be separated from each other in the radial direction Dr of the tank 11. Thereby, normally, the tank 11 is supported by the first saddle 22 which is a single fixed saddle and the second saddle 23 which is at least one sliding saddle. When the stored material in the tank 11 increases and the tank 11 is displaced downward, etc., the tank-side block member 273 and the hull-side block member 272 come into contact with each other in the third saddle 27 which is at least one sliding saddle, and support the load of the tank 11 from below. Thereby, in addition to the first saddle 22 which is a single fixed saddle and the second saddle 23 which is a single sliding saddle, the third saddle 27 which is a sliding saddle in which the tank-side block member 273 and the hull-side block member 272 are in contact supports the tank 11 from below, and the load of the tank 11 acting on the single saddle 21 can be reduced.

[0061] (Other embodiments) As described above, the embodiments of the present disclosure have been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within the scope not departing from the gist of the present disclosure are also included. In the above embodiment, the first saddle 22 disposed on one side in the axial direction Da of the tank 11 is a fixed saddle, the second saddle 23 disposed on the other side in the axial direction Da of the tank 11, and the third saddle 27 disposed in the middle portion in the axial direction Da of the tank 11 are sliding saddles. However, the present disclosure 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. Further, 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. Further, although the tank 11 is cylindrical, the tank 11 may be of a bi-lobe type, a tri-lobe type, or the like.

[0062] <Supplementary Note> The ship 1 described in each embodiment is understood as follows, for example.

[0063] (1) The ship 1 according to the first aspect includes a hull 2, a cylindrical tank 11 provided on the hull 2 and having an axis O extending in the horizontal direction, and tank support portions 20A and 20B provided on the hull 2 and supporting the tank 11. The tank support portions 20A and 20B have a plurality of saddles 21 extending in the circumferential direction Dc along the outer peripheral surface of the lower portion of the tank 11 and spaced apart in the axial direction Da in which the axis O extends. As the plurality of saddles 21, one fixed saddle 22 that supports the tank 11 so as not to move 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 are provided.

[0064] As a result, compared with the case where 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 becomes smaller, and the reaction force acting on the tank 11 from the saddle 21 also becomes smaller. Therefore, the necessity of increasing the strength of the tank 11 to resist the stress acting on the tank 11 due to the reaction force from the saddle 21 is suppressed. Accordingly, an increase in the dead weight of the tank 11, an increase in material cost, etc. can be suppressed, and an increase in the size of the tank 11 and an obstruction to the storage of a storage material having a large specific gravity can be suppressed. As a result, it becomes possible to provide the ship 1 that reduces the reaction force from the saddle 21 and enables coping with an increase in the size of the tank 11, storage of a storage material having a large specific gravity, etc.

[0065] (2) The ship 1 according to the second aspect is the ship 1 according to (1), wherein the plurality of saddles 21 include a base member 251 fixed to the hull 2, and a block member 253 disposed between the base member 251 and the outer peripheral surface of the tank 11. Among the plurality of saddles 21, the elastic modulus of the block member 253 of at least one of the saddles 25 is smaller than the elastic moduli of the block members 222 and 233 of the other saddles 22 and 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 plurality of saddles 21, the load of the tank 11 is not evenly distributed to the plurality of saddles 21, and the load may be concentrated on at least one of the plurality of saddles 25 rather than the other saddles 22 and 23. However, if the elastic modulus of the saddle 25 on which the load acts concentratedly is smaller than that of the other saddles 22 and 23, the saddle 25 having the smaller elastic modulus will elastically deform greatly in response to the concentrated load as compared with the other saddles 22 and 23. In this way, the load distribution of the tank 11 acting between the plurality of saddles 21 is equalized by the elastic deformation of the block member 253 of the saddle 25 having a small elastic modulus in response to the concentrated load. Thereby, it is possible to suppress an increase in the reaction force acting on the tank 11 from the saddle 21 at a specific location of the tank 11.

[0067] (3) The ship 1 according to the third aspect is the ship 1 of (2), and among the plurality of the saddles 21, the block member 253 of at least one of the saddles 25 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 with a small width W3 in the axial direction Da becomes smaller than the elastic moduli of the block members 222, 232, 233 of the other saddles 22, 23. Thereby, by only 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 plurality of saddles 21 can be easily equalized.

[0069] (4) The ship 1 according to the fourth aspect is the ship 1 of (2) or (3), and among the plurality of the saddles 21, the block member 253 of at least one of the saddles 25 has a greater thickness H3 in the radial direction Dr of the tank 11 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 becomes smaller than the elastic moduli of the block members 222, 232, 233 of the other saddles 22, 23. Thereby, by only 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 plurality of saddles 21 can be easily equalized.

[0071] (5) The ship 1 according to the fifth aspect is the ship 1 of any one of (2) to (4), and among the plurality of the saddles 21, the block member of at least one of the saddles 25 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 becomes smaller than the elastic moduli of the block members 222 and 233 of the other saddles 22 and 23. Thus, by only 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 plurality of saddles 21 can be easily equalized.

[0073] (6) The ship 1 according to the sixth aspect is any one of the ships 1 according to (1) to (5), and among the plurality of sliding saddles 23 and 26, at least one of the sliding saddles 26 is disposed apart from both sides in the radial direction Dr of the tank 11, and includes a pair of saddle members 260A and 260B that support the lower half of the tank 11 from below when the tank 11 is displaced by a predetermined dimension or more in the radial direction Dr.

[0074] As a result, normally, one fixed saddle 22 and one sliding saddle 23 support the tank 11, and when the tank 11 is displaced by a predetermined dimension or more in the radial direction Dr, in addition to one fixed saddle 22 and one sliding saddle 23, the sliding saddle 26 including the pair of saddle members 260A and 260B supports the lower half of the tank 11 from below. Thus, when the tank 11 is displaced in a direction intersecting the axis O due to the rocking 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 according to (1) to (6), and among the plurality of sliding saddles 23 and 27, at least one of the sliding saddles 27 includes 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 provided apart from each other in the radial direction Dr of the tank 11.

[0076] Thus, normally, the tank 11 is supported by one fixed saddle 22 and at least one sliding saddle 23. When the storage in the tank 11 increases and the tank 11 is displaced downward, etc., 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, and support the load of the tank 11 from below. Thereby, 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 are in contact supports the tank 11 from below, and the load of the tank 11 acting on one saddle 21 can be reduced.

Explanation of Signs

[0077] 1…Ship 2…Hull 2a…Bow 2b…Stern 3A, 3B…Side 4…Bottom 5…Upper deck 7…Superstructure 10…Tank facility 11…Tank 11a…Cylindrical part 11b…Platen part 11t…Projection 11w…Wall part 20A~20D…Tank support part 22…First saddle (fixed saddle, saddle) 23…Second saddle (sliding saddle, saddle) 24~27…Third saddle (sliding saddle, saddle) 221…Base member 221f…Curved surface 221k…Leg part 221w…Wall part 222…Fixed block member (block member) 222b…Block body 222s…Slit 231…Base member 231f…Curved surface 231k…Leg part 231w…Wall part 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 hull, a cylindrical tank provided on the hull and having an axis extending in the horizontal direction, and a tank support portion provided on the hull for supporting the tank, wherein the tank support portion has a plurality of saddles that extend circumferentially along the outer peripheral surface of the lower portion of the tank and are spaced apart in the axial direction in which the axis extends, and as the plurality of saddles, one fixed saddle that supports the tank so as not to move in the axial direction, and a plurality of sliding saddles that support the tank so as to be slidable in the axial direction, a ship.

2. The plurality of saddles include 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 among the plurality of saddles, the elastic modulus of the block member of at least one of the saddles is smaller than the elastic modulus of the block members of the other saddles The ship according to claim 1.

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

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

5. Among the plurality of saddles, the block member of at least one of the saddles is formed of a material having a smaller Young's modulus than the block members of the other saddles The ship according to claim 2.

6. Among the plurality of sliding saddles, at least one of the sliding saddles is provided with a pair of saddle members that are spaced apart on both sides in the radial direction of the tank and support the lower half of the tank from below when the tank is displaced by a predetermined dimension or more in the radial direction The ship according to claim 1.

7. Among the plurality of sliding saddles, at least one of the sliding saddles includes 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, wherein the tank-side block member and the hull-side block member are spaced apart in the radial direction of the tank The ship according to claim 1.

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