B-type liquefied gas storage tank

Abstract

The utility model discloses a B-type liquefied gas storage tank. The B-type liquefied gas storage tank comprises a tank body shell, a tank body internal structure, a heat insulation layer and a tank bottom supporting mechanism. The tank body shell is in a cylindrical barrel shape. The internal structure of the tank body comprises two middle reinforcing frames, a plurality of vertical reinforcements, a plurality of horizontal strong and weak structure rings, a tank top reinforcing structure and a tank bottom reinforcing structure. The two middle reinforcing frames are located on the transverse center line and the longitudinal center line of the storage tank cavity in a one-to-one correspondence mode. A plurality of vertical strong structures are uniformly distributed and fixed on the inner wall surface of the side part of the tank body shell; a plurality of horizontal strong and weak structure ring edges are fixed on the inner wall surface of the side part of the tank body shell at intervals; the tank top reinforcing structure comprises a top inner annular reinforcing structure, a top outer annular reinforcing structure and a plurality of top radial reinforcing structures; the tank bottom reinforcing structure comprises a bottom inner annular reinforcing structure, a bottom outer annular reinforcing structure and a plurality of bottom radial reinforcing structures; the heat insulation layer covers the outer surface of the tank body shell; the tank bottom supporting mechanism comprises a bottom anti-swing / anti-tilting support and a plurality of bottom supporting seats. The utility model has the characteristics of uniform stress, easiness in processing and low cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to a B type liquefied gas storage tank. BACKGROUND

[0002] B type liquid cargo tank is generally in the form of plane structure (prism) or rotary spherical type (MOSS type), and the latter is dominated by a Japanese company. The prism B type liquid cargo tank has been applied to container ships as LNG fuel tank or VLEC (very large ethane carrier) as liquid cargo tank in China.

[0003] The MOSS type B type liquid cargo tank adopts super-thick aluminum alloy welding, and the overall weight is large, and the welding technology and environment are high, and only a few shipyards in China can master this technology.

[0004] The prism B type liquid cargo tank has high manufacturing process requirements, especially the manufacturing of the corner (spherical head), and is prone to deformation. INVENTION CONTENTS

[0005] The utility model discloses a B type liquefied gas storage tank, which has the advantages of uniform stress, not easy to deform, saving materials, easy to process, low cost and the like.

[0006] The utility model discloses a B type liquefied gas storage tank, which has the advantages of uniform stress, not easy to deform, saving materials, easy to process, low cost and the like.

[0007] The tank body shell is in the form of a cylindrical barrel, and a cylindrical dome of the tank body shell extends through the top plate of the storage tank cavity;

[0008] The tank body internal structure comprises two middle reinforcing frames, a plurality of vertical reinforcing structures, a plurality of horizontal reinforcing structure rings, a plurality of horizontal weak structure rings, a tank top reinforcing structure and a tank bottom reinforcing structure;

[0009] The middle reinforcing frame is composed of a top middle reinforcing structure fixed on the inner wall surface of the top of the tank body shell, a bottom middle reinforcing structure fixed on the inner wall surface of the bottom of the tank body shell and two side middle reinforcing structures fixed on the inner wall surface of the side of the tank body shell. The top middle reinforcing structure and the bottom middle reinforcing structure of one middle reinforcing frame are located on the transverse center line of the storage tank cavity, and the top middle reinforcing structure and the bottom middle reinforcing structure of the other middle reinforcing frame are located on the longitudinal center line of the storage tank cavity;

[0010] The plurality of vertical reinforcing structures are fixed on the side inner wall surface of the tank body shell in circumferential uniform distribution together with the side middle reinforcing structures of the two reinforcing frames;

[0011] The plurality of horizontal reinforcing structure rings are fixed on the side inner wall surface of the tank body shell in the height direction of the tank body shell.

[0012] A plurality of horizontal weak structure rings are fixed on the inner wall surface of the side portion of the tank shell in the height direction of the tank shell and are spaced apart from the plurality of horizontal strong structure rings;

[0013] The tank top reinforcing structure comprises a top inner annular strong structure, a top outer annular strong structure and a plurality of top radial strong structures; the inner diameter of the top inner annular strong structure is adapted to the inner diameter of the dome, the top inner annular strong structure is fixed on the central portion of the top inner wall surface of the tank shell and disconnects the middle portion of the top middle strong structure of the two middle reinforcing frames; the top outer annular strong structure is fixed on the top inner wall surface of the tank shell and is coaxially located at the periphery of the top inner annular strong structure; the plurality of top radial strong structures are fixed on the top inner wall surface of the tank shell in one-to-one correspondence with the plurality of vertical strong structures and span between the top portions of the plurality of vertical strong structures and the outer peripheral surface of the top outer annular strong structure in one-to-one correspondence;

[0014] The tank bottom reinforcing structure comprises a bottom inner annular strong structure, a bottom outer annular strong structure and a plurality of bottom radial strong structures; the bottom inner annular strong structure is fixed on the central portion of the bottom inner wall surface of the tank shell; the bottom outer annular strong structure is fixed on the bottom inner wall surface of the tank shell and is coaxially located at the periphery of the bottom inner annular strong structure; the plurality of bottom radial strong structures are fixed on the bottom inner wall surface of the tank shell in one-to-one correspondence with the plurality of vertical strong structures and span between the bottom portions of the plurality of vertical strong structures and the outer peripheral surface of the bottom inner annular strong structure in one-to-one correspondence;

[0015] The heat insulation layer is wrapped on the outer surface of the tank shell;

[0016] The tank bottom supporting mechanism comprises a bottom anti-rolling / anti-tipping support seat arranged between the bottom center of the tank shell and the bottom plate of the storage tank cavity and a plurality of bottom supporting seats arranged between the bottom outer wall surface of the tank shell and the bottom plate of the storage tank cavity in a uniform manner.

[0017] The B-type liquefied gas storage tank described above, wherein the tank shell and the tank internal structure are made of nickel steel, high manganese steel, stainless steel or aluminum alloy.

[0018] The B-type liquefied gas storage tank described above, wherein the tank top reinforcing structure further comprises a plurality of top annular weak structures fixed on the top inner wall surface of the tank shell coaxially with the top inner annular strong structure.

[0019] The B-type liquefied gas storage tank described above, wherein the tank bottom reinforcing structure further comprises a plurality of bottom annular weak structures fixed on the bottom inner wall surface of the tank shell coaxially with the bottom inner annular strong structure.

[0020] The B-type liquefied gas storage tank, wherein the material of the heat insulation layer is polystyrene or polyurethane board insulation.

[0021] The B-type liquefied gas storage tank, wherein when the liquefied gas storage tank is installed in a storage tank cavity of a liquefied gas transport ship or a storage tank cavity of an offshore platform, the liquefied gas storage tank further comprises a plurality of top anti-floating supports evenly arranged between the top of the tank shell and the top plate of the storage tank cavity.

[0022] The structure of the top anti-floating support is the same as that of the bottom support and comprises a top seat, a bottom seat and a laminated wood block arranged between the top seat and the bottom seat; the top seat and the bottom seat are made of nickel steel, high manganese steel, stainless steel or aluminum alloy.

[0023] The B-type liquefied gas storage tank has the following characteristics:

[0024] 1. The tank shell is cylindrical, and the internal structure is also mostly annular. Since the forces on each part of the circle are balanced, the circle is not easy to deform even when the temperature changes.

[0025] 2. The tank shell is cylindrical, which requires less material than other columnar materials, so the cylindrical tank requires the least amount of material for the same volume, thereby saving material.

[0026] 3. The tank shell is cylindrical, which is relatively simple in processing technology, easy to form and low in manufacturing cost compared with other shapes. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is an axial sectional view of the B-type liquefied gas storage tank of the present application;

[0028] Figure 2 is Figure 1 A-A view in

[0029] Figure 3 is Figure 1 B-B view in

[0030] Figure 4 is Figure 1 C view in

[0031] Figure 5 is Figure 1 D view in DETAILED DESCRIPTION

[0032] The present application will be further described below with reference to the accompanying drawings.

[0033] Please refer to Figures 1 to 5The utility model discloses a B type liquefied gas storage tank, vertically arranged in the storage tank cavity and including tank body shell 1, tank body internal structure, heat insulation layer 8 and tank bottom support mechanism.

[0034] Tank body shell 1 is cylindrical barrel shape, and the top central extension of tank body shell 1 is cylindrical gas dome 10 that goes out the top plate 20 of storage tank cavity.

[0035] Tank body internal structure includes two middle reinforcing frames 2, four vertical reinforcements 3, three horizontal strong structure rings 4, eight horizontal weak structure rings 5, tank top reinforcing structure and tank bottom reinforcing structure, wherein,

[0036] Middle reinforcing frame 2 is made of T-shaped steel and is composed of top middle strong structure 21 fixed on the top inner wall surface of tank body shell 1, bottom middle strong structure 22 fixed on the bottom inner wall surface of tank body shell 1 and two side middle strong structures 23 fixed on the side inner wall surface of tank body shell 1, and the top of two side middle strong structures 23 and the bottom of two side middle strong structures 23 are respectively rounded with the two ends of top middle strong structure 21 and bottom middle strong structure 22, which can enhance the strength of middle reinforcing frame 2; the top middle strong structure 21 and bottom middle strong structure 22 of one middle reinforcing frame 2 are located on the transverse center line of storage tank cavity, and the top middle strong structure 21 and bottom middle strong structure 22 of another middle reinforcing frame 2 are located on the longitudinal center line of storage tank cavity;

[0037] Vertical reinforcement 3 is also made of T-shaped steel; four vertical strong structures 3 are fixed on the side inner wall surface of tank body shell 1 in circumferential uniform distribution with the side middle strong structures 23 of two middle reinforcing frames 2;

[0038] Three horizontal strong structure rings 4 are fixed on the side inner wall surface of tank body shell 1 in the height direction of tank body shell 1; the cross section of horizontal strong structure ring 4 is in horizontal T shape;

[0039] Eight horizontal weak structure rings 5 are fixed on the side inner wall surface of tank body shell 1 in the height direction of tank body shell 1 and are staggered with several horizontal strong structure rings 4; the cross section of horizontal weak structure ring 5 is in L shape;

[0040] The top reinforcement structure comprises a top inner annular reinforcement structure 61, a top outer annular reinforcement structure 62, four top radial reinforcement structures 63 and five top annular weak structures 64; the inner diameter of the top inner annular reinforcement structure 61 is adapted to the inner diameter of the dome 10, the top inner annular reinforcement structure 61 is fixed on the central part of the top inner wall surface of the tank shell 1 and disconnects the middle part of the top middle reinforcement structure 21 of the two middle reinforcement frames 2; the top outer annular reinforcement structure 62 is fixed on the top inner wall surface of the tank shell 1 and coaxially located on the periphery of the top inner annular reinforcement structure 61; the four top radial reinforcement structures 63 are correspondingly fixed on the top inner wall surface of the tank shell 1 and correspondingly span between the top of the four vertical reinforcement structures 3 and the outer circumferential surface of the top outer annular reinforcement structure 62; the five top annular weak structures 64 are coaxially fixed on the top inner wall surface of the tank shell 1 with the top inner annular reinforcement structure 61; the cross sections of the top inner annular reinforcement structure 61, the top outer annular reinforcement structure 62 and the four top radial reinforcement structures 63 are T-shaped; the cross section of the top annular weak structure 64 is L-shaped.

[0041] The bottom reinforcement structure comprises a bottom inner annular reinforcement structure 71, a bottom outer annular reinforcement structure 72, four bottom radial reinforcement structures 73 and five bottom annular weak structures 74; the bottom inner annular reinforcement structure 71 is fixed on the central part of the bottom inner wall surface of the tank shell 1; the bottom outer annular reinforcement structure 72 is fixed on the bottom inner wall surface of the tank shell 1 and coaxially located on the periphery of the bottom inner annular reinforcement structure 71; the four bottom radial reinforcement structures 73 are correspondingly fixed on the bottom inner wall surface of the tank shell 1 and correspondingly span between the bottom of the four vertical reinforcement structures 3 and the outer circumferential surface of the bottom inner annular reinforcement structure 71; the multiple bottom annular weak structures 74 are coaxially fixed on the bottom inner wall surface of the tank shell 1 with the bottom inner annular reinforcement structure 71; the cross sections of the bottom inner annular reinforcement structure 71, the bottom outer annular reinforcement structure 72 and the four bottom radial reinforcement structures 73 are T-shaped; the cross section of the bottom annular weak structure 74 is L-shaped.

[0042] The tank shell 1 and the tank internal structure are made of low-temperature resistant nickel steel, high manganese steel, stainless steel or aluminum alloy (brand 5083-O).

[0043] The heat insulation layer 8 is coated on the outer surface of the tank shell 1; the material of the heat insulation layer 8 is polystyrene (EPS) or polyurethane (PU) plate insulation; the thickness and material of the heat insulation layer 8 can be adjusted according to specific needs, and the evaporation rate is generally less than 0.25% / day.

[0044] The bottom support mechanism comprises a bottom anti-rolling / anti-inclination support 9A arranged between the bottom center of the tank shell 1 and the bottom plate 19 of the storage tank cavity and a plurality of bottom support seats 9B evenly arranged between the bottom outer wall surface of the tank shell 1 and the bottom plate 19 of the storage tank cavity.

[0045] When the liquefied gas storage tank is installed in the storage tank cavity of a liquefied gas transport ship or a storage tank cavity of an offshore platform, the liquefied gas storage tank further comprises a plurality of top anti-floating supports 9C evenly arranged between the top of the tank body shell 1 and the top plate 20 of the storage tank cavity.

[0046] The top anti-floating support 9C has the same structure as the bottom support 9B and comprises a top seat 91, a bottom seat 92 and a laminated wood block 90 arranged between the top seat 91 and the bottom seat 92; the top seat 91 and the bottom seat 92 are made of low-temperature-resistant nickel steel, high-manganese steel, stainless steel or aluminum alloy (brand 5083-O). The laminated wood block 90 is made of birch veneer and is hot-pressed after being impregnated with resin. The laminated wood block 90 is bonded to the top seat 91 and the bottom seat 92 by epoxy glue, which is used for installing liquefied petroleum gas / liquefied natural gas storage tanks, chemical storage tanks and other containment systems, sliding doors and anchor plates, etc., to position the laminated wood block 90 on the surface of the storage tank and the storage tank saddle, and to eliminate all precision fittings.

[0047] The top anti-floating support 9C and the bottom support 9B can withstand and inhibit the vertical movement of the B-type liquefied gas storage tank. The bottom anti-roll / anti-tip support 9A can withstand and inhibit the lateral and longitudinal movement of the B-type liquefied gas storage tank.

[0048] The B-type liquefied gas storage tank of the utility model can be used for storing low-temperature liquids such as liquefied natural gas, liquid ammonia and liquid nitrogen, has the advantages of uniform stress, difficulty in deformation, saving of materials, easy processing and low cost, and can be used in various fields of ship liquid cargo tanks, offshore platform liquid cargo storage tanks and land liquid cargo storage tanks.

[0049] The above embodiments are only used to illustrate the utility model and are not limited to the utility model. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the utility model, so all equivalent technical solutions should belong to the scope of the utility model and should be limited by the claims.

Claims

1. A B-type liquefied gas storage tank vertically arranged in a tank cavity and comprising a tank shell, a tank internal structure, a thermal insulation layer and a tank bottom support mechanism; characterized in that: the tank shell is in the shape of a cylindrical barrel, and a top portion of the tank shell extends a cylindrical dome through a top plate of the tank cavity; the tank internal structure comprises two middle reinforcing frames, a plurality of vertical reinforcing structures, a plurality of horizontal reinforcing structure rings, a plurality of horizontal weak structure rings, a tank top reinforcing structure and a tank bottom reinforcing structure; the middle reinforcing frame is composed of a top middle reinforcing structure fixed on an inner wall surface of a top portion of the tank shell, a bottom middle reinforcing structure fixed on an inner wall surface of a bottom portion of the tank shell and two side middle reinforcing structures fixed on inner wall surfaces of side portions of the tank shell; the top middle reinforcing structure and the bottom middle reinforcing structure of one middle reinforcing frame are located on a transverse center line of the tank cavity, and the top middle reinforcing structure and the bottom middle reinforcing structure of the other middle reinforcing frame are located on a longitudinal center line of the tank cavity; the plurality of vertical reinforcing structures are fixed on the inner wall surfaces of the side portions of the tank shell in a circumferential uniform distribution together with the side middle reinforcing structures of the two middle reinforcing frames; the plurality of horizontal reinforcing structure rings are fixed on the inner wall surfaces of the side portions of the tank shell in a height direction of the tank shell in a spaced manner; the plurality of horizontal weak structure rings are fixed on the inner wall surfaces of the side portions of the tank shell in a height direction of the tank shell in a spaced manner and staggered with the plurality of horizontal reinforcing structure rings; the tank top reinforcing structure comprises a top inner annular reinforcing structure, a top outer annular reinforcing structure and a plurality of top radial reinforcing structures; an inner diameter of the top inner annular reinforcing structure is adapted to an inner diameter of the dome, the top inner annular reinforcing structure is fixed on a central portion of the inner wall surface of the top portion of the tank shell and disconnects the middle portions of the top middle reinforcing structures of the two middle reinforcing frames, the top outer annular reinforcing structure is fixed on the inner wall surface of the top portion of the tank shell and coaxially located at an outer periphery of the top inner annular reinforcing structure, and the plurality of top radial reinforcing structures are fixed on the inner wall surface of the top portion of the tank shell in a one-to-one correspondence with the plurality of vertical reinforcing structures and span between the top portions of the plurality of vertical reinforcing structures and an outer peripheral surface of the top outer annular reinforcing structure in a one-to-one correspondence; the tank bottom reinforcing structure comprises a bottom inner annular reinforcing structure, a bottom outer annular reinforcing structure and a plurality of bottom radial reinforcing structures; the bottom inner annular reinforcing structure is fixed on a central portion of the inner wall surface of the bottom portion of the tank shell, the bottom outer annular reinforcing structure is fixed on the inner wall surface of the bottom portion of the tank shell and coaxially located at an outer periphery of the bottom inner annular reinforcing structure, and the plurality of bottom radial reinforcing structures are fixed on the inner wall surface of the bottom portion of the tank shell in a one-to-one correspondence with the plurality of vertical reinforcing structures and span between the bottom portions of the plurality of vertical reinforcing structures and an outer peripheral surface of the bottom inner annular reinforcing structure in a one-to-one correspondence; the thermal insulation layer is wrapped on an outer surface of the tank shell; and the tank bottom support mechanism comprises a bottom anti-rolling / anti-tipping support arranged between a central portion of the bottom portion of the tank shell and a bottom plate of the tank cavity and a plurality of bottom support seats arranged in a uniform distribution between an outer wall surface of the bottom portion of the tank shell and the bottom plate of the tank cavity. The tank shell and the tank internal structure are made of nickel steel, high manganese steel, stainless steel or aluminum alloy. ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The B-type liquefied gas storage tank according to claim 1, characterized by ​ 3. The B-type liquefied gas storage tank according to claim 1, wherein The top reinforcing structure further comprises a plurality of top annular weak structures coaxially fixed on the inner top wall of the tank shell with the top inner annular strong structure.

4. The B-type liquefied gas storage tank according to claim 1, wherein The bottom reinforcing structure further comprises a plurality of bottom annular weak structures coaxially fixed on the inner bottom wall of the tank shell with the bottom inner annular strong structure.

5. The B-type liquefied gas storage tank according to claim 1, wherein The material of the heat insulation layer is polystyrene or polyurethane board insulation.

6. The B-type liquefied gas storage tank according to any one of claims 1 to 5, characterized by When the liquefied gas tank is installed in the tank cavity of a liquefied gas transport ship or the tank cavity of an offshore platform, the liquefied gas tank further comprises a plurality of top anti-floating supports evenly arranged between the top of the tank shell and the top plate of the tank cavity. The top anti-floating support and the bottom support have the same structure and comprise a top seat, a bottom seat and laminated wood blocks arranged between the top seat and the bottom seat; the top seat and the bottom seat are made of nickel steel, high manganese steel, stainless steel or aluminum alloy.

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