CN114728685A - Supporting structure of storage tank and ship - Google Patents

Abstract

The support structure for the storage tank includes: a cylindrical tank extending with a horizontal direction as a longitudinal direction; a plurality of supported portions that are provided in a divided manner in a longitudinal direction and that have protruding portions that protrude from the tank in a direction orthogonal to the longitudinal direction; a support part having a placement surface on which the lower surface of the protruding part is placed so as to be movable relative to the lower surface of the protruding part; and a restricting portion provided on at least one of the plurality of support portions and restricting the protruding portion in the longitudinal direction with respect to the mounting surface.

Description

Support structure for storage tank and ship

Technical Field

The present invention relates to a support structure for a storage tank and a ship.

The present application claims priority based on patent application No. 2019-216665, filed in japanese application at 29/11/2019, and the contents of which are incorporated herein by reference.

Background

As a tank for storing liquefied gas or the like, there is a cylindrical tank extending in a horizontal direction. When a low-temperature content such as liquefied gas is stored in the cylindrical tank, the cylindrical tank may expand and contract due to a temperature difference with the periphery of the tank. Patent document 1 discloses a configuration in which two support portions (brackets) for supporting the tank are provided at an interval in the central axis direction of the tank. In this configuration, one of the support portions supports the tank so as not to be displaceable in the central axis direction with respect to the hull. The other support portion supports the tank so as to be slidable in the central axis direction with respect to the hull.

Prior art documents

Patent document

Patent document 1: japanese patent laid-open publication No. 2013-184504

Disclosure of Invention

Technical problem to be solved by the invention

The cross-sectional shape of the tank disclosed in patent document 1, which is orthogonal to the central axis, is circular. Each support portion has a support surface recessed in a semicircular shape to support the tank from below. Therefore, it is necessary to form the support surface of the support portion with high accuracy in accordance with the curved surface of the lower side surface of the tank, and there is a problem that it takes time to manufacture the support portion.

The present invention has been made to solve the above problems, and an object thereof is to provide a tank support structure and a ship that can efficiently install a tank.

Means for solving the technical problem

In order to solve the above problem, a support structure for a tank according to the present invention includes a tank, a supported portion, a support portion, and a restricting portion. The tank is a tube shape extending with a horizontal direction as a longitudinal direction. The supported portion is provided in plurality in the longitudinal direction. The supported portion has a protruding portion. The protruding portion protrudes from the tank in a direction orthogonal to the longitudinal direction. The support portion has a placement surface on which a lower surface of the protruding portion is placed so as to be movable relative to the support portion. The restricting portion is provided to at least one of the plurality of support portions. The regulating portion regulates the protruding portion in the longitudinal direction with respect to the placement surface.

The ship according to the present invention includes a hull and the above-described support structure for the storage tank. The hull has a pair of sides. The support portion is provided to the hull.

Effects of the invention

According to the support structure for a tank and the ship of the present invention, the tank can be efficiently installed.

Drawings

Fig. 1 is a plan view showing a schematic structure of a ship according to an embodiment of the present invention.

Fig. 2 is a side view of a tank facility according to an embodiment of the present invention.

Fig. 3 is a view of the tank facility according to the embodiment of the present invention as viewed from the longitudinal direction of the tank facility.

Fig. 4 is a view showing a main part of the tank facility according to the embodiment of the present invention, and is a sectional view taken along line a-a of fig. 2.

Fig. 5 is a diagram showing a structure of a support portion provided with a restricting portion in the tank facility according to the embodiment of the present invention, and is a sectional view taken along line B-B in fig. 3.

Fig. 6 is a view of the canister equipment according to the modification of the embodiment of the present invention as viewed from the longitudinal direction of the canister equipment.

Fig. 7 is a side cross-sectional view of a tank facility according to a modification of the embodiment of the present invention.

Fig. 8 is a side view of a tank facility according to a modification of the embodiment of the present invention.

Detailed Description

A ship according to an embodiment of the present invention will be described below with reference to fig. 1 to 5.

(hull structure of ship)

The ship 1 according to the embodiment of the present invention shown in fig. 1 transports Liquefied gases such as LNG (Liquefied Natural Gas), LPG (Liquefied Petroleum Gas), liquid carbon dioxide, and liquid ammonia. The ship 1 includes at least a hull 2 and a tank facility 20.

(Structure of hull)

As shown in fig. 1, the hull 2 has a pair of sides 3A, 3B in the form of its hull, a bottom (not shown), and an exposed deck 5. The sides 3A and 3B include a pair of side outer plates forming port and starboard sides, respectively. The bottom (not shown) includes a bottom outer plate connecting the sides 3A and 3B. The hull of the hull 2 has a U-shape in cross section perpendicular to the fore-aft direction Da by the pair of sides 3A and 3B and the bottom (not shown). The exposed deck 5 is an all-through deck exposed to the outside. In the hull 2, an upper structure 7 having a residential area is formed on the exposed deck 5 on the stern 2b side.

A cargo mounting area (hold) 8 is formed in the hull 2 on the bow 2a side of the superstructure 7. The cargo-carrying area 8 is recessed downward from a ship bottom (not shown) of the exposed deck 5 and opens upward.

(Structure of storage tank facility)

A plurality of tank facilities 20 are arranged in the cargo mounting area 8. In this embodiment, a total of 7 tank facilities 20 are disposed in the cargo-mounting area 8, for example. The layout and the number of the tank facilities 20 in the cargo-mounting area 8 are not limited at all.

As shown in fig. 2 and 3, each tank facility 20 includes a tank 21, supported portions 40A and 40B, supporting portions 50A and 50B, and a restricting portion 60 (see fig. 2).

The storage tank 21 contains liquefied gas. The tank 21 is made of a metal material such as an aluminum alloy. The tank 21 has a cylindrical shape extending with the longitudinal direction De being the horizontal direction. In this embodiment, the tank 21 is disposed such that the longitudinal direction De thereof coincides with, for example, the bow-to-stern direction Da of the hull 2. The orientation of the longitudinal direction De of the tank 21 is not limited to the bow-aft direction Da, and may be arranged so as to coincide with the ship width direction.

The tank 21 includes a body 21a and two mirror plates 21 b. The body portion 21a is cylindrical with a constant diameter along the longitudinal direction De. The mirror plate portions 21b are provided on both sides of the body portion 21a in the longitudinal direction De. The mirror plate portions 21b are disposed so as to close both ends of the body portion 21a in the longitudinal direction De. The mirror plate portion 21b gradually decreases in outer diameter as it separates from the body portion 21a in the longitudinal direction De. The outer surface of the mirror plate portion 21b is formed in a hemispherical shape, for example, protruding outward in the longitudinal direction. The mirror plate portion 21b is not limited to a hemispherical shape, and may be a curved surface shape formed by combining a plurality of radii of curvature.

Such a tank 21 is supported by the support portions 50A and 50B at two locations spaced apart in the longitudinal direction De.

The supported portions 40A and 40B are arranged apart from each other in the longitudinal direction De. The supported portion 40A is provided at one end in the longitudinal direction De of the body portion 21a of the tank 21. The supported portion 40B is provided at the other end in the longitudinal direction De of the body portion 21a of the tank 21. The supported portions 40A and 40B are provided with a ring portion 41 and a protruding portion 42, respectively. The supported portions 40A, 40B are preferably formed of the same metal material as the tank 21. This is because, when the tank 21 expands and contracts due to the temperature difference between the low-temperature liquefied gas in the tank 21 and the air outside the tank 21, the deformation occurring in the tank 21 and the supported portions 40A and 40B is as uniform as possible.

The ring portion 41 is formed in an annular shape extending in the circumferential direction along the outer circumferential surface of the tank 21.

The protruding portion 42 protrudes in a direction orthogonal to the longitudinal direction De with respect to the tank 21. In the embodiment of the present invention, the protruding portions 42 protrude from the tank 21 on both sides in the width direction Dw orthogonal to the longitudinal direction De, and a pair of the protruding portions are provided in the width direction Dw. A pair of protruding portions 42 is formed integrally with the ring portion 41. The pair of protruding portions 42 are formed to protrude from the ring portion 41 to both sides in the width direction Dw. Here, the width direction Dw represents a radial direction along a horizontal plane in the radial direction of the tank 21 perpendicular to the longitudinal direction De. The pair of projections 42 is provided at the middle portion of the tank 21 in the vertical direction Dv. In this embodiment, the pair of projections 42 are provided at positions including the central axis O of the accumulator 21 in the vertical direction Dv (in other words, positions overlapping the central axis O in the vertical direction Dv). As shown in fig. 4, each protrusion 42 has a constant thickness in the up-down direction Dv. The upper surface 42a and the lower surface 42b of each protrusion 42 are flat surfaces extending along a horizontal plane perpendicular to the vertical direction Dv.

As shown in fig. 2 to 5, the support portions 50A and 50B are provided on a deck 9, and the deck 9 is provided in the cargo-carrying area 8 of the hull 2. The support portions 50A and 50B are provided in plural numbers in the longitudinal direction De. The supporting portion 50A is provided at a position that coincides with the supported portion 40A in the longitudinal direction De. The supporting portion 50B is provided at a position that coincides with the supported portion 40B in the longitudinal direction De. As shown in fig. 4, support portions 50A and 50B integrally include lower support portion 51, upper support portion 52, and connection portion 53, respectively.

The lower support portion 51 is fixed to the deck 9, for example. In this embodiment, the lower end of the lower support portion 51 is fixed to the deck 9. The lower support portion 51 extends upward in the vertical direction Dv from the deck 9. A mounting surface 55 on which the protruding portion 42 is mounted is formed on the upper surface of the lower support portion 51. The mounting surface 55 is a flat surface along a horizontal plane orthogonal to the vertical direction Dv.

The upper support portion 52 is disposed above the placement surface 55 with a gap therebetween in the vertical direction Dv. The lower surface 52b of the upper support portion 52 faces the placement surface 55 with a gap therebetween in the vertical direction Dv. The lower surface 52b of the upper support portion 52 illustrated in this embodiment is a flat surface parallel to the placement surface 55.

Coupling portion 53 couples lower support portion 51 and upper support portion 52. The coupling portion 53 is provided outside the placement surface 55 in the width direction Dw of the accumulator 21. The connection portion 53 extends upward from the lower support portion 51. Coupling portion 53 is coupled to an outer end portion of upper support portion 52 in the width direction Dw.

With respect to such support portions 50A and 50B, protruding portion 42 is disposed between lower support portion 51 and upper support portion 52 in vertical direction Dv. In this way, the protruding portion 42 is accommodated in the support portions 50A, 50B.

The carriage surface 55 is provided with a slide member 56. In the coupling portion 53, a slide member 57 is provided on a side surface 53s facing the placement surface 55. A sliding member 58 is provided on the lower surface 52b of the upper support portion 52. The sliding members 56, 57, and 58 are each flat plate-shaped and made of stainless steel or the like, and are attached so as to cover the mounting surface 55, the side surface 53s, and the lower surface 52 b. The sliding members 56, 57, and 58 are preferably smooth in surface to obtain good sliding properties.

The protruding portions 42 of the supported portions 40A and 40B are provided with heat insulators 71, 72, and 73.

The heat insulating material 71 is disposed along the lower surface 42b of the protrusion 42. The heat insulating material 71 is sandwiched between the lower surface 42b of the projection 42 and the slide member 56 provided on the mounting surface 55.

The heat insulating material 72 is disposed along the upper surface 42a of the protrusion 42. The heat insulating material 72 is sandwiched between the upper surface 42a of the protruding portion 42 and the sliding member 58 provided on the lower surface 52b of the upper support portion 52.

The heat insulating material 73 is provided along a side end surface 42s facing outward in the width direction Dw in the protruding portion 42. The heat insulator 73 is provided between the side end surface 42s of the protruding portion 42 and the slide member 57 provided on the side surface 53s of the coupling portion 53.

As the heat insulating materials 71, 72, 73, for example, a wood material can be used. The heat insulators 71, 72, and 73 are plate-shaped having a predetermined thickness, and are fixed to the upper surface 42a, the lower surface 42b, and the side end surfaces 42s with an adhesive or the like, respectively.

In this way, heat insulators 71, 72, and 73 are sandwiched between protruding portions 42 of supported portions 40A and 40B and supporting portions 50A and 50B. The heat insulators 71, 72, and 73 suppress heat transfer from the supported portions 40A and 40B provided in the tank 21 to the supporting portions 50A and 50B.

The protruding portions 42 of the supported portions 40A and 40B are placed on the sliding member 56 provided on the placement surface 55 of the lower support portion 51 via the heat insulating material 71. The protruding portion 42 is relatively movable in the longitudinal direction De and the width direction Dw, which are directions along the horizontal plane, on the slide member 56. The heat insulating material 73 provided on the side end surface 42s of the protruding portion 42 faces the slide member 57 provided on the side surface 53s of the coupling portion 53 in the width direction Dw. The heat insulator 72 and the sliding member 57 are disposed with a gap therebetween in the width direction Dw. Even when the protruding portion 42 is displaced outward in the width direction Dw due to thermal deformation of the tank 21 or the like and the heat insulator 73 provided to the protruding portion 42 abuts against the slide member 57, the protruding portion 42 can be relatively moved in the longitudinal direction De along the slide member 57.

As shown in fig. 5, the restricting portion 60 restricts at least a part of the protruding portions 42 of the plurality of supported portions 40A and 40B in the longitudinal direction De with respect to the placement surface 55. In this embodiment, the restricting portions 60 are provided on the respective support portions 50A on one side (for example, the bow side) in the longitudinal direction De, and the support portions 50A are provided on both sides in the width direction Dw of the tank 21. The restricting portion 60 may be provided only on the support portion 50A on either side in the width direction Dw of the accumulator 21 on the longitudinal direction De side.

The regulating portion 60 includes a pair of wall portions 61A and 61B and a fixture 63. A pair of wall portions 61A and 61B are provided between lower support portion 51 and upper support portion 52 of support portion 50A. The wall portions 61A and 61B are provided on both end portions in the longitudinal direction De on the mounting surface 55. The wall portions 61A and 61B are provided along a vertical plane perpendicular to the longitudinal direction De.

The protruding portion 42 is inserted and arranged between the pair of wall portions 61A, 61B. The protruding portion 42 is bonded and fixed with heat insulating materials 74 and 75 on both sides in the longitudinal direction De.

The fixture 63 is provided on one wall portion 61A of the pair of wall portions 61A, 61B. The fixture 63 of this embodiment is screwed into a screw hole 61h formed in the wall portion 61A. The fixture 63 is disposed with its central axis along the length direction De. When the fixture 63 is rotated about the central axis in a state where it is screwed into the screw hole 61h, the fixture 63 is provided so as to be able to advance and retreat toward the other wall portion 61B in the longitudinal direction De. In a state where the fixture 63 is fastened, the distal end portion of the fixture 63 abuts against the heat insulator 74 provided to the protruding portion 42. Here, the sliding members 64 and 65 are sandwiched between the heat insulator 74 and the distal end portion of the fixture 63 and between the heat insulator 75 and the other wall portion 61B, respectively.

The restricting portion 60 restricts the protruding portion 42 in the longitudinal direction De with respect to the placement surface 55. The restricting portion 60 allows relative displacement of the protruding portion 42 in the width direction Dw by sandwiching the slide members 64 and 65.

(Effect)

In the support structure for the accumulator 21 of the above embodiment, the support structure includes the supported portions 40A and 40B having the protruding portion 42 protruding from the accumulator 21 in the direction orthogonal to the longitudinal direction De, the support portions 50A and 50B having the placement surface 55 on which the lower surface 42B of the protruding portion 42 is placed so as to be movable relative to the placement surface 55, and the restricting portion 60 restricting the protruding portion 42 in the longitudinal direction De relative to the placement surface 55.

With this configuration, the tank 21 of the tank facility 20 can be supported by the hull 2 by placing the protruding portion 42 protruding from the tank 21 on the placement surfaces 55 of the support portions 50A and 50B. That is, since the support portions 50A and 50B do not support the tank 21 by the semicircular lower side surface 21r (see fig. 3), it is not necessary to form the placement surface 55 with high accuracy in correspondence with the curved surface of the lower side surface 21r of the tank 21, and the placement surface 55 can be formed easily. In addition, when the tank 21 is installed, only the protruding portion 42 may be placed on the placement surfaces 55 of the support portions 50A and 50B, and thus the load imposed on the installation work of the tank 21 can be reduced.

As a result, the tank 21 can be efficiently installed while suppressing an increase in the weight of the equipment by the support structure of the tank 21.

In the support structure of the accumulator 21 according to the above embodiment, the lower surface 42b of the protruding portion 42 and the placement surface 55 are flat surfaces along a horizontal plane.

According to the support structure of the accumulator 21, the projection 42 and the placement surface 55 can be formed more easily than in the case where the placement surface 55 is formed corresponding to the curved surface of the lower surface 21r (see fig. 3) of the accumulator 21. The lower surface 42b of the projection 42 is relatively movable on the mounting surface 55 along a horizontal plane. Thus, the support portion 50B, on which the regulating portion 60 is not provided, can support the tank 21 so as to be relatively movable in the longitudinal direction De and the width direction Dw. Thus, in the support portion 50B where the regulating portion 60 is not provided, deformation of the tank 21 in the longitudinal direction De and the width direction Dw can be permitted. In the support portion 50A provided with the regulating portion 60, the tank 21 is also movable relative to the support portion 50A in the width direction Dw. Therefore, the support portion 50A provided with the regulating portion 60 can allow the deformation of the accumulator 21 in the width direction Dw.

In the support structure of the accumulator 21 of the above embodiment, a pair of protruding portions 42 are provided which protrude from the accumulator 21 on both sides in the width direction Dw orthogonal to the longitudinal direction De. The support portions 50A and 50B accommodate the protruding portion 42 in a manner sandwiched from above and below.

With this configuration, the pair of protruding portions 42 protruding from the tank 21 on both sides in the width direction Dw are placed on the placement surfaces 55 of the support portions 50A and 50B, whereby the tank 21 can be supported more stably in the hull 2.

The support portions 50A and 50B accommodate the protruding portion 42 in a manner sandwiched from above and below. Thereby, the protruding portion 42 is restricted by the support portions 50A and 50B in the vertical direction Dv. Therefore, it is not necessary to provide a mechanism for preventing the tank 21 from floating separately from the support portions 50A and 50B.

As a result, the installation of the accumulator 21 can be efficiently performed by the support structure of the accumulator 21.

In the support structure for the tank 21 according to the above embodiment, the supported portions 40A and 40B further include annular ring portions 41 extending in the circumferential direction along the outer circumferential surface of the tank 21, and the pair of projecting portions 42 are provided so as to project from the ring portions 41 on both sides in the width direction Dw.

According to the support structure of the accumulator 21, the support portions 50A and 50B include the annular ring portion 41, and thus the accumulator 21 can be supported more stably. Further, by providing the protruding portions 42 so as to protrude from the ring portion 41 on both sides in the width direction Dw, concentration of stress on the base portions of the protruding portions 42 is suppressed.

In the support structure for the accumulator 21 of the above embodiment, the pair of projections 42 is provided at the middle portion in the vertical direction Dv of the accumulator 21. Therefore, compared to the case where the accumulator 21 is supported by the lower side surface 21r, the displacement amount of the accumulator 21 when deformed in the vertical direction Dv can be suppressed at the upper end portion 21t or the lower end portion 21s (see fig. 3) of the accumulator 21. Therefore, when a pipe or the like is connected to the upper end portion 21t or the lower end portion 21s of the tank 21, stress or the like applied to the pipe or the like due to deformation of the tank 21 can be suppressed.

In the support structure for tank 21 of the above embodiment, support portions 50A and 50B include lower support portion 51 having placement surface 55, upper support portion 52 disposed at a distance Dv from placement surface 55 in the vertical direction Dv, and coupling portion 53 coupling lower support portion 51 and upper support portion 52.

According to the support structure of tank 21, projection 42 is accommodated between placement surface 55 of lower support portion 51 and upper support portion 52 in a vertically sandwiched manner, and is regulated in vertical direction Dv with respect to support portions 50A and 50B. In this way, the support portions 50A and 50B having both the function of supporting the tank 21 and the function of suppressing the floating of the tank 21 can be realized with a simple configuration.

In the support structure for the accumulator 21 of the above embodiment, the restriction portion 60 includes the pair of wall portions 61A, 61B provided on both sides in the longitudinal direction De with respect to the protruding portion 42, and the fixing tool 63 provided on one wall portion of the pair of wall portions 61A, 61B.

According to this support structure for the accumulator 21, when the projecting portion 42 is inserted between the pair of wall portions 61A and 61B and then the fixture 63 is moved forward in the longitudinal direction De with respect to the projecting portion 42 at the time of assembling the accumulator facility 20, the projecting portion 42 can be sandwiched between the fixture 63 and the wall portion 61B. Thereby, the protruding portion 42 is restricted in the longitudinal direction De. By configuring the restricting portion 60 using the fixture 63 in this manner, the projecting portion 42 can be easily inserted between the pair of wall portions 61A, 61B in a state where the fixture 63 is released. Therefore, the assembly of the tank facility 20 can be easily performed.

In the support structure for the tank 21 of the above embodiment, the tank 21 and the supported portions 40A and 40B are formed of a metal material, and further, heat insulating materials 71 to 75 are provided so as to be sandwiched between the protruding portions 42 of the supported portions 40A and 40B and the support portions 50A and 50B.

According to the support structure of the tank 21, the tank 21 and the supported portions 40A and 40B are formed of a metal material, and a difference between the amount of thermal deformation of the tank 21 and the amount of thermal deformation of the supported portions 40A and 40B due to heat propagation of the tank 21 can be suppressed. This suppresses occurrence of a gap or the like between the tank 21 and the supported portions 40A and 40B due to thermal deformation. Furthermore, heat insulating materials 71-75 are sandwiched between supported portions 40A, 40B and supporting portions 50A, 50B, thereby suppressing heat of tank 21 from being extracted from supported portions 40A, 40B by supporting portions 50A, 50B.

The ship 1 of the above embodiment includes a hull 2 having a pair of sides 3A and 3B, and a support structure of the tank 21 provided in the hull 2, and the support portions 50A and 50B are provided in the hull 2.

According to such a ship 1, it is possible to provide a ship 1 in which the installation of the storage tank 21 can be efficiently performed while suppressing an increase in the weight of the equipment.

(modification of embodiment)

In the above embodiment, the pair of protruding portions 42 protruding from the tank 21 on both sides in the width direction Dw orthogonal to the longitudinal direction De are provided, but the present invention is not limited thereto.

For example, as shown in the modification examples of fig. 6 and 7, the tank 21 may be supported by supported portions 40C and 40D having a projecting portion 42B projecting downward from the tank 21.

The supported portions 40C and 40D are arranged apart from each other in the longitudinal direction De. The supported portions 40C and 40D include a ring portion 41 and a protruding portion 42B, respectively. The protruding portion 42B protrudes downward in the vertical direction Dv perpendicular to the longitudinal direction De with respect to the tank 21. The projection 42B is provided at the lowermost portion of the reservoir 21. In this embodiment, the lower surface 42d of the protruding portion 42B is a flat surface along a horizontal plane orthogonal to the vertical direction Dv.

The support portions 50C and 50D have placement surfaces 55B on which the lower surfaces 42D of the protruding portions 42 are placed so as to be movable relative to each other. The support portions 50C and 50D include a lower support portion 101 and a side support portion 102, respectively. The lower support 101 is fixed to the deck 9, for example. A mounting surface 55B on which the projecting portion 42B is mounted is formed on the upper surface of the lower support portion 101. The mounting surface 55B is a flat surface along a horizontal plane orthogonal to the vertical direction Dv. The side support portions 102 are disposed at intervals on both sides in the width direction Dw with respect to the placement surface 55B.

With respect to the support portions 50C and 50D, the protruding portion 42B is disposed between the side support portions 102 on both sides in the width direction Dw above the placement surface 55B of the lower support portion 101.

The mounting surface 55B is provided with a slide member 111. Further, the sliding members 112 are provided on the projecting portions 42B of the side support portions 102, respectively. The sliding members 111 and 112 are each flat plate-shaped and made of stainless steel or the like. The sliding members 111 and 112 are preferably smooth in surface in order to obtain good sliding properties.

The protruding portions 42B of the supported portions 40C and 40D are provided with heat insulators 121 and 122 at positions facing the slide members 111 and 112. As the heat insulating materials 121 and 122, for example, a wood material can be used. The heat insulators 121 and 122 are plate-shaped having a predetermined thickness, and are fixed to the protruding portion 42B with an adhesive or the like, for example.

In this way, the heat insulating materials 121 and 122 are sandwiched between the protruding portions 42B of the supported portions 40C and 40D and the supporting portions 50C and 50D. The heat insulators 121 and 122 suppress heat transfer from the supported portions 40C and 40D provided in the tank 21 to the supporting portions 50C and 50D.

The protruding portion 42B is relatively movable in the longitudinal direction De along the slide members 111 and 112. The projection 42B is restricted from displacement in the width direction Dw by a fixing member 131 such as a bolt provided to the pair of side support portions 102.

As shown in fig. 7, a restricting portion 60B is provided in the support portion 50C provided on the longitudinal direction De side. The restricting portion 60B restricts the protruding portion 42B of the supported portion 40C in the longitudinal direction De with respect to the placement surface 55B.

The regulating portion 60B includes a pair of wall portions 61C and 61D and a fixture 63B. The pair of wall portions 61C, 61D are provided at both end portions in the longitudinal direction De of the lower support portion 101 of the support portion 50C. The wall portions 61C and 61D are provided on both end portions in the longitudinal direction De on the mounting surface 55B.

The protruding portion 42B is inserted and arranged between the pair of wall portions 61C and 61D. The protruding portion 42B is bonded and fixed with heat insulating materials 124 and 125 on both sides in the longitudinal direction De.

The fixture 63B is provided on one wall portion 61D of the pair of wall portions 61C, 61D. The fixing tool 63B in the modification of the embodiment is a bolt, and is screwed into the wall portion 61D. In a state where the fixture 63B is fastened, the distal end of the fixture 63B abuts against the heat insulator 125 provided on the protruding portion 42B.

The restricting portion 60B restricts the projection 42B in the longitudinal direction De with respect to the mounting surface 55B.

In the support structure for the tank 21 having the above-described configuration, the tank 21 of the tank facility 20 can be supported by the hull 2 by placing the protruding portion 42B protruding from the tank 21 on the placement surface 55B of the support portions 50C and 50D. This enables the tank 21 to be efficiently installed.

The displacement of the accumulator 21 in the width direction Dw is restricted by providing a pair of side support portions 102 on both sides of the protruding portion 42B in the width direction Dw. Thereby, the accumulator 21 is restricted from rotating in the circumferential direction around the center axis O.

(other embodiments)

While the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to the embodiments, and design changes and the like are included within a scope not departing from the gist of the present invention.

In the above embodiment, the supported portions 40A, 40B, 40C, and 40D are disposed at both ends of the body portion 21a of the tank 21 in the longitudinal direction De. The supported portions 40A, 40B, 40C, and 40D may be disposed at positions closer to the center in the longitudinal direction De than the end portions in the longitudinal direction De of the body portion 21a of the tank 21. The supported portions 40A, 40B, 40C, and 40D may be disposed on the mirror plate portions 21B closing both ends in the longitudinal direction De of the body portion 21 a.

In the above embodiment, two sets of the support portions 50A, 50B, 50C, and 50D are provided with an interval therebetween in the longitudinal direction De, but the present invention is not limited to this. For example, as shown in fig. 8, one or more supported portions 40C and supporting portions 50C may be provided between the supporting portion 50A and the supporting portion 50B.

In the above embodiment, the lower support portion 51 is fixed to the deck 9, but the present invention is not limited thereto. The lower support portion 51 may be provided on a main component of the hull, and may be fixed to a bulkhead or the like without being limited to the deck 9.

In the above embodiment, the coupling portion 53 that couples the lower support portion 51 and the upper support portion 52 is provided at the outer side in the width direction Dw than the protruding portion 42, but the present invention is not limited thereto. The connection portion 53 may be disposed in the front and rear of the protrusion 42 in the longitudinal direction De.

In the above embodiment, the heat insulating materials 71, 72, 73, 121, 122, 124, and 125 are provided, but the present invention is not limited thereto. If the difference between the temperature of the liquid or gas contained in the tank 21 and the ambient temperature of the tank 21 is small, the heat insulating materials 71, 72, 73, 121, 122, 124, 125 may not be provided.

In the above embodiment, the supported portions 40A, 40B, 40C, and 40D include the ring portion 41, but the protruding portion 42 may be directly joined to the tank 21 without the ring portion 41. However, in this case, it is estimated that the stress concentrates on the base of the protrusion 42 engaged with the tank 21. Therefore, the ring portion 41 is preferably provided.

In the above embodiment, the ring portion 41 is formed in an annular shape extending in the circumferential direction along the outer circumferential surface of the tank 21. However, the shape of the ring portion 41 is not limited to the annular shape. For example, the ring portion 41 may be continuous in a circular plate shape in the circumferential direction. Further, the ring portion 41 may be discontinuous in the circumferential direction such as being cut halfway in the circumferential direction. The ring portion 41 is not limited to the case where it is formed outside the tank 21, and the ring portion 41 may be formed inside the tank 21 or may be formed over the outside and inside of the tank 21, for example.

In the above embodiment, the pair of projections 42 have a function of supporting the tank 21 and the float prevention mechanism of the tank 21, but the present invention is not limited thereto. For example, when the storage tank 21 is installed on the exposed deck 5, the function as the floating prevention mechanism of the storage tank 21 is not essential.

In the above embodiment, the fixture 63 is provided on one wall portion of the pair of wall portions 61A and 61B, and 61C and 61D, but the present invention is not limited thereto. The fixture 63 may be provided on both of the pair of wall portions 61A and 61B, 61C, and 61D, and the protrusion 42 may be held between the fixtures 63 provided on the pair of wall portions 61A and 61B, 61C, and 61D, thereby restricting the protrusion 42 in the longitudinal direction De with respect to the placement surfaces 55 and 55B.

In the above embodiment, the tank facility 20 is provided in the cargo-mounting region 8 formed in the hull 2, but the present invention is not limited to this. For example, the tank installation 20 may be disposed on the exposed deck 5.

In the above embodiment, the liquefied gas is stored in the tank 21, but the contents stored in the tank 21 are not limited to the liquefied gas and may be any fluid such as a liquid or a gas.

In the above embodiment, the tank 21 is formed of a metal material such as an aluminum alloy, but the invention is not limited thereto. Any appropriate material may be used depending on the characteristics such as the temperature of the liquid or gas contained in the tank 21.

In the above embodiment, the supported portions 40A, 40B, 40C, and 40D are preferably made of the same metal material as the tank 21, but are not limited thereto. The supported portions 40A, 40B, 40C, 40D and the tank 21 may be formed of different materials. For example, the supported portions 40A, 40B, 40C, and 40D may be formed of a resin material or the like as long as a liquid or a gas at normal temperature is contained in the tank 21.

In the above-described embodiment and modification, the sliding members 56, 57, 58, 111, and 112 are each formed in a flat plate shape made of stainless steel or the like having a smooth surface. However, the present invention is not limited to this configuration, and for example, the sliding members 56, 57, 58, 111, and 112 may be flat plate-like members made of stainless steel or the like disposed on the surfaces thereof.

In the above embodiment, the ship 1 transporting liquefied gas is exemplified, but the support structure of the tank 21 as described above can be applied to a tank containing fuel for sailing the ship 1.

In the above embodiment, the tank facility 20 is provided in the ship 1, but the present invention is not limited to this. The tank facility 20 may be installed in a floating offshore facility, for example.

< appendix >)

The support structure of the tank 21 and the ship 1 described in the embodiment are understood as follows, for example.

(1) The support structure for the accumulator 21 according to embodiment 1 includes: a cylindrical tank 21 extending with a horizontal direction as a longitudinal direction De; a plurality of supported portions 40A, 40B, 40C, and 40D provided at intervals in the longitudinal direction De, and having protruding portions 42 and 42B protruding from the tank 21 in a direction orthogonal to the longitudinal direction De; support portions 50A, 50B, 50C, 50D having placement surfaces 55, 55B on which lower surfaces 42B, 42D of the protruding portions 42, 42B are placed so as to be relatively movable; and restricting portions 60, 60B provided on at least one of the support portions 50A, 50B, 50C, 50D and restricting the protruding portions 42, 42B in the longitudinal direction De with respect to the mounting surfaces 55, 55B.

In the support structure of the tank 21, the cylindrical tank 21 is supported by placing the protruding portions 42 and 42B provided in the supported portions 40A, 40B, 40C, and 40D on the placing surfaces 55 and 55B of the supporting portions 50A, 50B, 50C, and 50D. That is, the support portions 50A, 50B, 50C, and 50D are not supported by the semicircular portions on the lower side of the tank 21. Therefore, it is not necessary to form the placing surfaces 55 and 55B with high accuracy in accordance with the curved surface of the lower surface 21r of the accumulator 21, and the placing surfaces 55 and 55B can be formed easily. In addition, when the tank 21 is installed, only the protruding portion 42 may be placed on the placement surfaces 55 and 55B of the support portions 50A, 50B, 50C, and 50D, and thus the load on the installation work of the tank 21 can be reduced.

As a result, the tank 21 can be efficiently installed.

(2) The support structure for the accumulator 21 according to claim 2 is the support structure for the accumulator 21 of (1), and the lower surfaces 42B and 42d of the protruding portion 42 and the mounting surfaces 55 and 55B are flat surfaces along a horizontal plane, respectively.

Thus, the projecting portion 42 and the mounting surfaces 55, 55B can be formed more easily than in the case where the mounting surfaces 55, 55B are formed corresponding to the curved surface of the lower side surface 21r of the accumulator 21. Since the lower surfaces 42B and 42d of the protruding portion 42 and the mounting surfaces 55 and 55B are flat surfaces along the horizontal plane, the lower surfaces 42B and 42d of the protruding portion 42 can move relative to each other on the mounting surfaces 55 and 55B along the horizontal plane. Thus, in the support portions 50B and 50D where the regulating portion 60 is not provided, the tank 21 can be supported so as to be movable relative to the support portions 50B and 50D in the longitudinal direction De of the tank 21 along the horizontal plane. Thus, in the support portions 50B and 50D where the regulating portion 60 is not provided, deformation of the tank 21 in the longitudinal direction De can be permitted.

(3) The support structure for the tank 21 according to the 3 rd aspect is the support structure for the tank 21 according to the (1) or (2), wherein a pair of the protruding portions 42 are provided so as to protrude from the tank 21 on both sides in the width direction Dw orthogonal to the longitudinal direction De, and the support portions 50A and 50B are provided on both sides in the width direction Dw of the tank 21, respectively, and hold the protruding portions 42 therebetween from above and below.

Thus, the tank 21 can be supported more stably in the hull 2 by placing the pair of projections 42 projecting from the tank 21 on both sides in the width direction Dw on the placement surfaces 55 of the support portions 50A and 50B.

The support portions 50A and 50B accommodate the protruding portion 42 in a manner sandwiched from above and below. Thereby, the protruding portion 42 is restricted by the support portions 50A and 50B in the vertical direction Dv. Therefore, it is not necessary to provide a mechanism for preventing the tank 21 from floating separately from the support portions 50A and 50B.

As a result, the support structure of the accumulator 21 can effectively install the accumulator 21 while suppressing an increase in the weight of the equipment.

(4) The support structure for the accumulator 21 according to claim 4 is the support structure for the accumulator 21 of (3), the supported portions 40A and 40B further include annular ring portions 41 extending in the circumferential direction along the outer circumferential surface of the accumulator 21, and a pair of the protruding portions 42 are provided so as to protrude from the ring portions 41 on both sides in the width direction Dw.

Accordingly, the support portions 50A and 50B include the annular ring portion 41, and thus the tank 21 can be supported more stably. Further, by providing the protruding portions 42 so as to protrude from the ring portion 41 on both sides in the width direction Dw, concentration of stress on the base portions of the protruding portions 42 is suppressed.

(5) The support structure for the accumulator 21 according to claim 5 is the support structure for the accumulator 21 according to (3) or (4), and the pair of projections 42 is provided at the middle portion in the vertical direction Dv of the accumulator 21.

Thus, by providing the pair of projections 42 at the intermediate portion in the vertical direction Dv of the tank 21, the amount of displacement of the tank 21 when deformed in the vertical direction Dv can be suppressed in the upper end portion 21t or the lower end portion 21s of the tank 21, as compared with the case where the tank 21 is supported from below by the lower side surface 21 r. Therefore, when a pipe or the like is connected to the upper end portion 21t or the lower end portion 21s of the tank 21, stress or the like applied to the pipe or the like due to deformation of the tank 21 can be suppressed.

(6) The support structure for the accumulator 21 according to claim 6 is a support structure for the accumulator 21 according to any one of (3) to (5), and the support portions 50A and 50B include a lower support portion 51 having the placement surface 55, an upper support portion 52 disposed at an interval in the vertical direction Dv with respect to the placement surface 55, and a coupling portion 53 coupling the lower support portion 51 and the upper support portion 52.

Accordingly, projection 42 is accommodated between placement surface 55 of lower support 51 and upper support 52 in a vertically sandwiched manner, and is regulated in vertical direction Dv with respect to supports 50A and 50B. In this way, the support portions 50A and 50B having both the function of supporting the tank 21 and the function of suppressing the floating of the tank 21 can be realized with a simple configuration.

(7) The support structure for the tank 21 according to claim 7 is a support structure for the tank 21 according to any one of (1) to (6), and the restricting portions 60 and 60B include a pair of wall portions 61A and 61B, 61C, and 61D provided on both sides in the longitudinal direction De with respect to the protruding portions 42 and 42B, and fixing devices 63 and 63B provided on at least one of the pair of wall portions 61A and 61B, 61C, and 61D so as to be capable of advancing and retracting in the longitudinal direction De with respect to the protruding portions 42 and 42B.

Thus, when the tank facility 20 is assembled, the projections 42 and 42B can be sandwiched in the longitudinal direction De by inserting the projections 42 and 42B between the pair of wall portions 61A and 61B, 61C, and 61D and then fastening the fixtures 63 and 63B. Therefore, the assembly of the tank facility 20 can be easily performed.

(8) The support structure for the tank 21 according to the 8 th aspect is a support structure for the tank 21 according to any one of (1) to (7), and the tank 21 and the supported portions 40A, 40B, 40C, and 40D further include heat insulating materials 71 to 75, 121, 122, 124, and 125 that are formed of a metal material and are interposed between the protruding portion 42 of the supported portions 40A, 40B, 40C, and 40D and the support portions 50A, 50B, 50C, and 50D.

Thus, by forming the tank 21 and the supported portions 40A, 40B, 40C, and 40D from a metal material, it is possible to suppress a difference between the amount of thermal deformation of the tank 21 and the amount of thermal deformation of the supported portions 40A, 40B, 40C, and 40D due to heat propagation of the tank 21. This suppresses occurrence of gaps and the like between the tank 21 and the supported portions 40A, 40B, 40C, and 40D due to thermal deformation. Furthermore, heat insulators 71 to 75, 121, 122, 124, and 125 are interposed between supported portions 40A, 40B, 40C, and 40D and supporting portions 50A, 50B, 50C, and 50D, thereby suppressing heat of tank 21 from being extracted from supported portions 40A, 40B, 40C, and 40D by supporting portions 50A, 50B, 50C, and 50D.

(9) The ship 1 according to claim 9 includes a hull 2 having a pair of sides 3A and 3B, and a support structure of any one of the tanks 21 (1) to (8) provided in the hull 2, and the support portions 50A and 50B are provided in the hull 2.

This makes it possible to provide the ship 1 in which the tank 21 can be efficiently installed while suppressing an increase in the weight of the equipment.

Industrial applicability

According to the support structure for a tank and the ship of the present invention, the tank can be efficiently installed.

Description of the symbols

1-vessel, 2-hull, 2 a-bow, 2B-stern, 3A, 3B-side, 5-exposed deck, 7-superstructure, 8-cargo-carrying area, 9-deck, 20-tank installation, 21-tank, 21 a-trunk, 21B-deck, 21 r-underside, 21 s-lower end, 21 t-upper end, 40A, 40B, 40C, 40D-supported portion, 41-ring portion, 42B-projecting portion, 42 a-upper surface, 42B, 42D-lower surface, 42 s-side end, 50A, 50B, 50C, 50D-supporting portion, 51, 101-lower supporting portion, 52-upper supporting portion, 52B-lower surface, 53-connecting portion, 53 s-side surface, 55B-placing surface, 56, 57, 58-sliding member, 60B-limiting portion, 61A, 61B, 61C, 61D-wall portion, 61 h-screw hole, 63B-fixing means, 64, 65, 111, 112-sliding member, 71-75, 121, 122, 124, 125-heat insulating material, 102-side supporting portion, 131-fixing member, O-center axis.

Claims (9)

1. A support structure for a storage tank, comprising:

a cylindrical tank extending with a horizontal direction as a longitudinal direction;

a plurality of supported portions that are provided separately in the longitudinal direction and that have protruding portions that protrude from the tank in a direction orthogonal to the longitudinal direction;

a support portion having a placement surface on which the lower surface of the protruding portion is placed so as to be movable relative to the lower surface of the protruding portion; and

and a restricting portion provided in at least one of the plurality of support portions and restricting the protruding portion in the longitudinal direction with respect to the mounting surface.

2. The support structure for a storage tank of claim 1,

the lower surface of the protruding portion and the mounting surface are flat surfaces along a horizontal plane.

3. The support structure of the storage tank according to claim 1 or 2,

a pair of the protruding portions are provided so as to protrude from the tank toward both sides in the width direction orthogonal to the longitudinal direction,

the support portions are provided on both sides of the tank in the width direction, respectively, and accommodate the protruding portions in a manner of being sandwiched from above and below.

4. The support structure for a storage tank of claim 3,

the supported portion further includes an annular ring portion extending in a circumferential direction along an outer circumferential surface of the tank,

the pair of protruding portions is provided so as to protrude from the ring portion to both sides in the width direction.

5. The support structure for the storage tank of claim 3 or 4,

the pair of protruding portions is provided at a middle portion in the vertical direction of the tank.

6. The support structure for the storage tank of any one of claims 3 to 5,

the support portion includes:

a lower support portion having the mounting surface;

an upper support portion arranged at an interval in a vertical direction with respect to the placement surface; and

and a connecting portion connecting the lower support portion and the upper support portion.

7. The support structure for the storage tank of any one of claims 1 to 6,

the restriction unit includes:

a pair of wall portions provided on both sides in the longitudinal direction with respect to the protruding portion; and

and a fixing tool provided on at least one of the pair of wall portions so as to be capable of advancing and retreating in the longitudinal direction with respect to the protruding portion.

8. The support structure for the storage tank of any one of claims 1 to 7,

the tank and the supported portion are formed of a metal material,

the support structure of the storage tank further includes a heat insulating material interposed between the protruding portion of the supported portion and the support portion.

9. A ship is provided with:

a hull having a pair of sides; and

the support structure for a storage tank of any one of claims 1 to 7, disposed within the hull,

the support portion is provided to the hull.

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