CN113911266A

CN113911266A - Liquid cargo heat insulation device and liquefied gas carrier

Info

Publication number: CN113911266A
Application number: CN202111431093.XA
Authority: CN
Inventors: 秦斌; 张道志; 郑双燕; 周鑫元; 许敏
Original assignee: Jiangnan Shipyard Group Co Ltd
Current assignee: Jiangnan Shipyard Group Co Ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-01-11

Abstract

The invention provides a liquid cargo heat insulation device and a liquefied gas carrier, comprising: the sealed tank, the base and the cabin body. The inside of the sealed tank is stored with liquid cargo. One end of the base is connected with the sealing tank. The cabin body is covered with a sealed tank, the cabin body is connected with the other end of the base, the cabin body and the sealed tank enclose a sealed cavity, and gas with poor thermal conductivity is filled in the sealed cavity. The invention solves the problem that the prior liquid tank is directly exposed to the external environment and causes poor heat insulation effect.

Description

Liquid cargo heat insulation device and liquefied gas carrier

Technical Field

The invention relates to the field of liquefied gas carriers, in particular to a liquid cargo heat insulation device and a liquefied gas carrier.

Background

A separate tank (hereinafter referred to as a tank) may be installed on the liquefied gas carrier for storing and transporting the liquefied gas cargo (hereinafter referred to as a liquid cargo) in a low temperature state. In chinese patent CN103879516A, an independent liquefied gas carrier is disclosed, which comprises a hull, a hydraulic pump, a cantilever beam, a storage tank, a bay, a connecting rod, a release door, a release ejector pin, a release pin, a hydraulic pump station, a hydraulic ejector pin, a release and a push rod. Since the independent tanks (i.e., storage tanks) are directly exposed to the external environment, it is not possible to completely isolate external heat from entering the independent tanks during storage and transportation of liquid cargo having a relatively low boiling point (e.g., liquid hydrogen, which has a boiling point of-253 ℃). Even have a small amount of heats to enter into independent fluid reservoir in the external environment, also can cause the liquid goods in the independent fluid reservoir to take place the gasification, make the pressure in the independent fluid reservoir continuously rise, bring the potential safety hazard for independent fluid reservoir, and then endanger the liquefied gas carrier. Therefore, the independent liquid tanks in the prior art all have the problem of poor heat insulation effect caused by direct exposure in the external environment.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a liquid cargo heat insulation device, which comprises: the sealed tank, the base and the cabin body. Liquid goods are stored in the sealed tank. One end of the base is connected with the sealing tank. The cabin body coats the sealing tank, the cabin body is connected with the other end of the base, the base supports the sealing tank from the inner surface of the cabin body, the cabin body and the sealing tank enclose a sealing cavity, and gas with poor thermal conductivity is filled in the sealing cavity.

Preferably, the seal pot includes sealed inner tank and sealed outer tank, liquid goods are stored to the inside of sealed inner tank, sealed outer tank connects the base.

Preferably, the liquid cargo heat insulation device further comprises a support seat, one end of the support seat is connected with the sealed inner tank, the other end of the support seat is connected with the sealed outer tank, the support seat separates the sealed outer tank from the sealed inner tank and then is used for forming a vacuum cavity, and a filling medium with poor thermal conductivity is arranged in the vacuum cavity.

Preferably, the supporting seat is a semi-annular rib plate, the semi-annular rib plate comprises an inner annular surface and an outer annular surface, the inner annular surface is connected with the inner sealing tank in an encircling manner, and the outer annular surface is connected with the outer sealing tank in an encircling manner.

Preferably, the cabin body comprises an upper cabin body and a lower cabin body, the upper cabin body is movably connected with the lower cabin body, and the lower cabin body is connected with the base.

Preferably, the base is a polygonal ribbed plate, the polygonal ribbed plate comprises an arc surface and a plane, the arc surface surrounds and is connected with the sealed outer tank, and the plane is connected with the inner surface corresponding to the lower cabin in an attaching mode.

Preferably, the gas is dry air or an inert gas.

Preferably, the liquid cargo insulation means further comprises a first thermal radiation shield layer disposed on an outer surface of the sealed outer tank.

Preferably, the liquid cargo insulation further comprises a second thermal radiation shield layer disposed on an interior surface of the tank.

The invention also provides a liquefied gas carrier which comprises the liquid cargo heat insulation device.

The invention has the beneficial effects that: after the base props up the internal surface of the sealed tank from the cabin body, let cabin body and sealed tank enclose synthetic sealed cavity and fill into the poor gas of heat conductivity in sealed cavity, can let sealed tank and external environment further keep apart, reduced the absorptive heat of liquid goods heat-insulating device from external environment for liquid goods heat-insulating device's adiabatic effect is better, prevents that liquid goods heat-insulating device from leading to pressure rising to produce the potential safety hazard because of liquid goods gasification in the transportation.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to be implemented according to the content of the description, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments of the present invention.

Drawings

FIG. 1 is a perspective view of a liquid cargo insulation (with the upper tank removed) according to an embodiment of the present invention;

FIG. 2 is an exploded view of a liquid cargo insulation unit according to an embodiment of the present invention;

FIG. 3 is a front view of a liquid cargo insulation unit according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3, in accordance with an embodiment of the present invention;

FIG. 5 is a top view of a liquid cargo insulation unit according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5, in accordance with an embodiment of the present invention;

FIG. 7 is a cross-sectional view taken along line C-C of FIG. 6 in accordance with an embodiment of the present invention;

FIG. 8 is a perspective view of the support base according to the embodiment of the present invention;

FIG. 9 is a cross-sectional view taken along line D-D of FIG. 6 in accordance with an embodiment of the present invention;

FIG. 10 is a perspective view of a base in an embodiment of the present invention;

fig. 11 is a schematic view of the application of the liquid cargo insulation apparatus to the liquefied gas carrier according to the embodiment of the present invention.

Description of reference numerals:

1 liquid cargo heat insulation device

10 sealed pot

100 sealed inner tank

101 sealed outer tank

11 base

11a polygonal rib

110a arc surface

111a plane

1110a section line

12 cabin body

120 upper cabin body

121 lower cabin body

1210 inner contour line

13 sealed cavity

14 support seat

14a semi-annular rib

140a inner ring surface

141a outer annular surface

15 vacuum cavity

16 filling medium

17 first thermal radiation shield

18 second thermal radiation shield

2 liquid cargo

3 liquefied gas carrier

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1 to 6, the present invention provides a liquid cargo heat insulation apparatus 1, including: a sealed inner vessel 100, a sealed outer vessel 101, a first thermal radiation shield 17, a support base 14, a base 11, a cabin 12, and a second thermal radiation shield 18. The hermetic vessel 10 includes a hermetic inner vessel 100 and a hermetic outer vessel 101. The material of the inner containment vessel 100 may be stainless steel or an aluminum alloy. The material of the seal outer tank 101 may be stainless steel, aluminum alloy, and carbon steel. The sealed inner tank 100 stores liquid cargo 2 therein. The liquid 2 may be liquid hydrogen. The first thermal radiation shield layer 17 is provided on the outer surface of the hermetically sealed outer tank 101. The first thermal radiation shield layer 17 may be a copper foil or an aluminum foil. One end of the supporting seat 14 is connected with the inner sealed tank 100, the other end of the supporting seat 14 is connected with the outer sealed tank 101, the supporting seat 14 separates the outer sealed tank 101 from the inner sealed tank 100 and then is used for forming a vacuum cavity 15, and a filling medium 16 with poor thermal conductivity is arranged in the vacuum cavity 15. The number of the supporting seats 14 is at least 2. The support base 14 may connect the inner vessel 100 and the outer vessel 101 by riveting or welding. The filling medium 16 can be pearlite sand and perlite, and the filling medium 16 can be pearlite sand and/or perlite which can occupy part of the space of the vacuum cavity 15, so that the difficulty of vacuumizing the vacuum cavity 15 can be greatly reduced. Meanwhile, because the pearlife and the perlite have low heat conductivity coefficient, the pearlife and the perlite are filled into the vacuum cavity 15 to have the function of heat insulation. The absolute pressure of the vacuum cavity 15 is 10pa (pa, pascal) or less. The sealed outer tank 101 is connected with the base 11, and the connection mode of the sealed outer tank 101 and the base 11 can be threaded connection, riveting connection or welding connection. The number of the bases 11 is at least 2. The enclosure 12 encloses a sealed inner vessel 100 and a sealed outer vessel 101. The cabin 12 comprises an upper cabin 120 and a lower cabin 121, the upper cabin 120 is movably connected with the lower cabin 121, and the lower cabin 121 is connected with the other end of the base 11. The upper and

lower body

120 and 121 may be assembled by hinging or snap-fitting. The lower hull 121 may be connected to the base 11 by screwing, riveting or welding. The base 11 supports the sealed tank 10 from the inner surface of the cabin body 12, the upper cabin body 120, the lower cabin body 121 and the sealed tank 10 enclose a sealed cavity 13, and the sealed cavity 13 is filled with gas with poor thermal conductivity. The second thermal radiation shield 18 is disposed on the inner surfaces of the upper and

lower housings

120, 121. The second thermal radiation shield 18 may be a copper foil or an aluminum foil. The first and second thermal radiation shields 17, 18 may form a radiation barrier preventing an external heat source from transferring heat to the liquid cargo 2 by means of thermal radiation.

The base 11 supports the seal pot 10 from the inner surface of the lower chamber 121. Can fill into gas in sealed cavity 13, let seal pot 10 and external environment further keep apart, reduced the adiabatic device 1 of liquid goods and from the absorptive heat of external environment for the adiabatic effect of adiabatic device 1 of liquid goods is better, prevents that adiabatic device 1 of liquid goods from leading to pressure to rise in the transportation because the gasification of liquid goods 2 produces the potential safety hazard.

Referring to fig. 7 and 8, preferably, the supporting seat 14 is a semi-annular rib 14a (the supporting seats are denoted by 14 and 14a, and different reference numerals are used for the sake of distinction), the semi-annular rib 14a includes an inner annular surface 140a and an outer annular surface 141a, the inner annular surface 140a is connected to the inner sealing can 100 in an encircling manner, and the outer annular surface 141a is connected to the outer sealing can 101 in an encircling manner. The preferred means of attachment of the inner annular surface 140a to the sealed inner vessel 100 is welding. The preferred connection of the outer annular surface 141a and the seal outer vessel 101 is welding. The support seat 14 is formed by the semi-annular rib plate 14a, and the pressure on the support seat 14 can be more uniformly applied to the inner sealed tank 100 and the outer sealed tank 101 by surface contact with the inner sealed tank 100 and the outer sealed tank 101, so that stress concentration on the inner sealed tank 100 and the outer sealed tank 101 is prevented from damaging the inner sealed tank 100 and the outer sealed tank 101. The support base 14 is not as thermally insulating as the filling medium 16 but is stronger than the filling medium 16, and the use of the semi-annular rib 14a allows the support strength requirement to be satisfied with a relatively small volume while reducing the amount of heat conducted from the inner vessel 100 through the support base 14.

Referring to fig. 9 and 10, preferably, the base 11 is a polygonal rib 11a (the

reference numerals

11 and 11a refer to bases, and different reference numerals are used for the sake of distinction), the polygonal rib 11a includes an arc surface 110a and a plane 111a, the arc surface 110a surrounds and is connected to the sealed outer tank 101, and the plane 111a is attached to and connected to the corresponding inner surface of the lower tank 121. The preferred connection of the arcuate surface 110a to the outer containment vessel 101 is by welding. The preferred connection of the flat surface 111a to the lower housing 121 is welding. The number of the planes 111a may be plural, and the section line 1110a thereof is substantially coincident with the inner contour line 1210 of the lower housing 121. For example, the inner contour line 1210 of the lower hull 121 is pentagonal, and the cross-sectional line 1110a of the plane 111a may also be pentagonal. The length and angle of each line segment constituting the inner contour line 1210 are substantially the same as those of each line segment constituting the cross-sectional line 1110a, so that the polygonal rib plate 11a and the lower case 121 are closely attached. The arc surface 110a surrounds the sealed outer tank 101, and the inner surfaces of the plane 111a corresponding to the lower chamber 121 are respectively attached and connected to enable the pressure of the base 11 to be more uniformly applied to the sealed outer tank 101 and the lower chamber 121, so that the base 11 is prevented from generating stress concentration to damage the sealed outer tank 101 and the lower chamber 121. The base 11 is not as heat-insulating as gas, and the polygonal rib 11a can satisfy the requirement of supporting strength with a relatively small volume, and can also reduce the heat conducted from the sealed outer tank 101 through the base 11.

Preferably, the gas inside the sealed cavity 13 is dry air or an inert gas. The inert gas may be helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon. The filling of the sealed cavity 13 with dry air or inert gas can reduce the heat transfer between the sealed can 10 and the external environment, and the cost of heat insulation is lower than that of vacuum pumping.

As shown in fig. 11, the present invention also provides a liquefied gas carrier 3 including a liquid cargo heat insulating device 1. The number of the liquid cargo insulation devices 1 in the liquefied gas carrier 3 may be single or plural.

The liquid cargo heat insulation device and the liquefied gas carrier provided by the embodiment of the present invention are described in detail above, and those skilled in the art may change the specific implementation manner and the application scope according to the idea of the embodiment of the present invention. In view of the foregoing, it will be seen that this invention is not limited by the foregoing description, but is intended to cover all equivalent modifications and changes in accordance with the spirit and scope of the invention as defined by the appended claims.

Claims

1. A liquid cargo insulating apparatus, comprising:

a sealed tank in which liquid cargo is stored;

a base having one end connected to the sealing can; and

the cabin body wraps the sealing tank, the cabin body is connected with the other end of the base, the base supports the sealing tank from the inner surface of the cabin body, the cabin body and the sealing tank enclose a sealing cavity, and gas with poor thermal conductivity is filled in the sealing cavity.

2. The liquid cargo insulation apparatus according to claim 1, wherein the hermetic container comprises a hermetic inner container and a hermetic outer container, the hermetic inner container stores the liquid cargo therein, and the hermetic outer container is connected to the base.

3. The liquid cargo heat insulation device according to claim 2, further comprising a support base, wherein one end of the support base is connected with the inner sealed tank, the other end of the support base is connected with the outer sealed tank, the support base separates the outer sealed tank from the inner sealed tank to form a vacuum cavity, and a filling medium with poor thermal conductivity is arranged in the vacuum cavity.

4. The liquid cargo insulation apparatus according to claim 3, wherein the support seat is a semi-annular rib, the semi-annular rib comprises an inner annular surface and an outer annular surface, the inner annular surface is connected to the inner tank in an encircling manner, and the outer annular surface is connected to the outer tank in an encircling manner.

5. The liquid cargo insulation apparatus of claim 2 wherein the tank comprises an upper tank and a lower tank, the upper tank and the lower tank being movably connected, the lower tank being connected to the base.

6. The liquid cargo heat insulation device according to claim 5, wherein the base is a polygonal rib plate, the polygonal rib plate comprises an arc surface and a plane, the arc surface is connected with the sealed outer tank in an encircling manner, and the plane is connected with the inner surface corresponding to the lower cabin in an attaching manner.

7. The liquid cargo insulation apparatus according to any one of claims 1 to 6, wherein the gas is dry air or an inert gas.

8. The liquid cargo insulation apparatus according to any one of claims 2 to 6, further comprising a first thermal radiation shield layer disposed on an outer surface of the outer containment tank.

9. The liquid cargo insulation apparatus of any one of claims 1-6, further comprising a second thermal radiation shield layer disposed on an interior surface of the enclosure.

10. A liquefied gas carrier, comprising the liquid cargo heat insulating device according to any one of claims 1 to 6.