CN113734351A - Marine liquid tank - Google Patents

Abstract

Translated fromChinese

本发明提供了一种船用液罐，其包括罐体、罐体连接处所和夹层管路。其中，罐体包括用于储存低温液体的内罐和包覆于内罐外部的外罐，内罐和外罐之间形成有绝热夹层。罐体连接处所包括外壳和固定于外壳内的连接管路，外壳设于外罐的外周侧壁上并沿外罐的轴向延伸，外壳与外罐之间围合形成一中空的收容腔。夹层管路包括多个依次折弯相连的管段，夹层管路的内端与内罐连通，夹层管路的外端穿过外罐并伸入收容腔内与连接管路连接。罐体连接处所设于外罐的侧壁上，充分利用了船体的宽度方向上的空间，而不占据罐体安装所需要的长度方向上的空间，增加了罐体的装载容积，保证了船舶海上运行的续航能力。

The invention provides a marine liquid tank, which includes a tank body, a tank body connection place and an interlayer pipeline. Wherein, the tank body includes an inner tank for storing low-temperature liquid and an outer tank covered outside the inner tank, and an insulating interlayer is formed between the inner tank and the outer tank. The tank body connection place includes an outer shell and a connecting pipeline fixed in the outer shell. The outer shell is arranged on the outer peripheral side wall of the outer tank and extends along the axial direction of the outer tank. A hollow receiving cavity is formed between the outer shell and the outer tank. The interlayer pipeline includes a plurality of pipe sections which are connected by bending in sequence, the inner end of the interlayer pipeline is communicated with the inner tank, and the outer end of the interlayer pipeline passes through the outer tank and extends into the receiving cavity to be connected with the connecting pipeline. The tank connection is located on the side wall of the outer tank, which makes full use of the space in the width direction of the hull without occupying the space in the length direction required for the installation of the tank, which increases the loading volume of the tank and ensures the safety of the ship. Endurance for offshore operations.

Description

Marine liquid tank

Technical Field

The invention relates to the technical field of marine transportation tank bodies, in particular to a marine liquid tank.

Background

At present, in order to meet the increasingly severe environmental challenges and reduce the sulfur oxide emissions in the pollution emission control area, a series of regulations are provided by International Maritime Organization (IMO for short) to control the environmental pollution, and natural gas is used as a clean energy and is more economical than traditional fuels such as diesel oil, so that the LNG (liquefied natural gas) fuel-powered ship develops rapidly in recent years.

The marine LNG fuel Tank generally employs a vacuum horizontal vessel, a Tank body Connection location (Tank Connection Space, TCS for short) of the vessel is located at the tail of the vessel body, and an interlayer pipeline between an inner Tank and an outer Tank is arranged between an inner seal head and an outer seal head. The scheme has wide application and mature manufacturing process. However, if the space in the length direction of the ship body is limited and the space in the width direction is more abundant, the space on the ship body cannot be fully utilized by the scheme, so that the volume of an LNG fuel tank loaded on the ship is greatly reduced, the frequency of refueling the ship in short-range shipping is increased, and the single-time sailing distance of the long-range ship is reduced.

Disclosure of Invention

The invention aims to provide a marine liquid tank to solve the problem that the arrangement of a fuel tank in the prior art is limited by the length space of a ship body, so that the volume is reduced.

In order to solve the technical problems, the invention adopts the following technical scheme:

a marine tank comprising: the tank body comprises an inner tank for storing cryogenic liquid and an outer tank coated outside the inner tank, and a heat insulation interlayer is formed between the inner tank and the outer tank; the tank body connecting position comprises a shell and a connecting pipeline fixed in the shell; the outer shell is positioned on the side part of the outer tank and extends along the axial direction of the outer tank, the outer shell is arranged on the middle area of the outer tank along the axial direction, and a hollow accommodating cavity is formed by the outer shell and the outer tank in a surrounding manner; the interlayer pipeline comprises a plurality of sequentially bent and connected pipe sections positioned in the heat insulation interlayer, the inner end of the interlayer pipeline is communicated with the inner tank, and the outer end of the interlayer pipeline penetrates through the outer tank and extends into the containing cavity to be connected with the connecting pipeline.

According to one embodiment of the invention, the housing is located on one side of the central axis of the tank in the transverse direction of the tank.

According to one embodiment of the invention, the lower end of the outer shell exceeds the lowest point of the outer tank, and the upper end of the outer shell exceeds the middle of the outer tank.

According to one embodiment of the invention, the housing comprises a top plate, an outer side coaming, a bottom plate and a bottom side plate which are connected in sequence; the top plate and the bottom plate are horizontally spaced, the top plate is axially positioned between the top and the middle of the outer tank and is fixedly connected with the outer wall of the outer tank, the bottom side plate is arranged at the bottom of the outer tank, and the bottom plate is fixedly connected with the outer tank through the bottom side plate so as to be positioned below the lowest point of the outer tank; the outer side coaming is located the outside of outer jar to connect respectively the roof, the bottom plate with the outer wall of outer jar to enclose and close and form a sealed chamber of acceping.

According to one embodiment of the invention, the bottom side plate is arranged vertically along a central vertical axis of the lowest point of the outer tank.

According to one embodiment of the invention, the plurality of pipe sections comprises a plurality of axial pipe sections and a plurality of transition pipe sections; the axial pipe sections are arranged at intervals in a staggered mode, each axial pipe section is parallel to the axial direction of the tank body, and two ends of each transition pipe section are respectively connected with two adjacent axial pipe sections in a bending mode.

According to one embodiment of the invention, the sandwich pipe further comprises a plurality of stiffeners; each reinforcing piece is correspondingly arranged at the joint between two adjacent pipe sections.

According to one embodiment of the invention, the outer tank comprises a cylinder body and two seal heads respectively arranged at two axial ends of the cylinder body; the shell is connected with the cylinder, and the two ends of the shell in the axial direction are respectively spaced from the two seal heads.

According to one embodiment of the invention, the marine liquid tank further comprises two saddles distributed at intervals along the axial direction of the tank body, and each saddle is supported and arranged at the bottom of the cylinder body of the outer tank; the shell is arranged between the two saddles in the axial direction of the tank body.

According to one embodiment of the invention, the marine liquid tank further comprises two groups of support structures arranged in the heat insulation interlayer and used for connecting the inner tank and the outer tank, and the two groups of support structures are distributed at intervals along the axial direction of the tank body; each group of the supporting structure comprises a plurality of supporting pipe groups which are circumferentially distributed along the same cross section of the tank body, wherein the included angle of the circle center between any two adjacent supporting pipe groups at the lower part of the tank body is smaller than the included angle of the circle center between two adjacent supporting pipe groups at the upper part of the tank body.

According to the technical scheme, the marine liquid tank provided by the invention at least has the following advantages and positive effects:

1. compared with the arrangement scheme of the tail part of the tank body, the connecting part of the tank body is arranged on the side wall of the outer tank, so that the space in the width direction of the ship body is fully utilized, the space in the length direction required by the installation of the tank body is not occupied, the loading volume of the tank body is increased, and the cruising ability of the ship in the marine operation is ensured.

2. Its intermediate layer pipeline includes a plurality of consecutive pipeline sections of bending, and the shearing force that receives when the pipeline takes place axial ascending relative displacement because of the temperature difference stress including, outer jar can be alleviated in this design of bending, avoids the intermediate layer pipeline to receive and involves too big and warp, damaged scheduling problem, improves the stress of pipeline, ensures that the normal use of pipeline and guarantees that LNG does not reveal.

Drawings

Fig. 1 is a schematic diagram of a marine tank in a horizontal position in the embodiment of the invention.

Figure 2 is a schematic transverse cross-section of a marine tank according to an embodiment of the invention.

Fig. 3 is an enlarged view of fig. 1 at a.

Fig. 4 is an enlarged view of fig. 1 at B.

The reference numerals are explained below: 1-tank body, 11-outer tank, 12-inner tank, 13-heat insulation interlayer, 111-cylinder body, 113-end enclosure, 15-saddle, 2-tank body joint, 21-shell, 211-top plate, 213-outer side enclosing plate, 2131-plate body, 2133-enclosing plate, 215-bottom plate, 217-bottom side plate, 23-connecting pipeline, 25-airtight door, 3-interlayer pipeline, 31-pipe section, 31 a-axial pipe section, 31 b-transition pipe section, 4-supporting structure, 41-supporting pipe group, 411-outer tank fixing pipe, 413-inner tank fixing pipe and 415-supporting pipe.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.

The embodiment provides a marine fluid reservoir, is the marine equipment that collects LNG fluid reservoir and jar body junction in an organic whole.

The TCS is arranged on the peripheral side wall of the LNG tank, so that the space in the width direction of the ship body is fully utilized, the space in the length direction required by the installation of the tank body is not occupied, the loading volume of the tank body is increased, the TCS is particularly suitable for ships with surplus in the width direction of the ship body, the application range is expanded, and the sufficient cruising ability of the marine ship is ensured.

The marine liquid tank comprises a tank body, a tank body connecting part and an interlayer pipeline. The tank body comprises an inner tank for storing cryogenic liquid and an outer tank coated outside the inner tank, and a heat insulation interlayer is formed between the inner tank and the outer tank. The tank body joint comprises a shell and a connecting pipeline fixed in the shell, the shell is arranged on the peripheral side wall of the outer tank and extends along the axial direction of the outer tank, and a hollow accommodating cavity is formed by enclosing the shell and the outer tank. The interlayer pipeline comprises a plurality of pipe sections which are sequentially bent and connected, the inner end of the interlayer pipeline is communicated with the inner tank, and the outer end of the interlayer pipeline penetrates through the outer tank and extends into the containing cavity to be connected with the connecting pipeline.

Referring to fig. 1, fig. 1 shows a specific structure of a marine liquid tank provided in this embodiment, which includes a tank body 1, a tankbody connecting location 2 disposed on the tank body 1, and asandwich pipeline 3 disposed in a sandwich layer of the tank body.

The tank body 1 comprises an inner tank 12 for storing cryogenic liquid LNG, anouter tank 11 coated outside the inner tank 12, and twosaddles 15 arranged oppositely, and aheat insulation interlayer 13 is formed between the inner tank 12 and theouter tank 11.

When the tank body 1 is horizontally arranged on the ship body, the axial direction of the tank body 1 is consistent with the length direction of the ship body, and the transverse direction of the tank body 1 is consistent with the width direction of the ship body. Theouter tank 11 and the inner tank 12 each include acylinder 111 and twoend sockets 113 respectively disposed at two axial ends of thecylinder 111. Twosaddles 15 are spaced apart in the axial direction of the tank 1 to support the bottom of thecylinder 111 provided in theouter tank 11.

The tankbody connecting part 2 is arranged on the side wall of the tank body 1. Specifically, thetank junction 2 mainly includes ahousing 21 and a connectingline 23 fixed in thehousing 21 for supplying air to a power system of the ship. Wherein, theouter casing 21 covers the outer peripheral side wall of theouter tank 11 and extends along the axial direction of theouter tank 11, and theouter casing 21 is positioned on one side of the central axis of the tank 1 along the transverse direction of the tank 1. Thehousing 21 and theouter tank 11 enclose a hollow accommodating cavity. This accommodate the chamber and supply the outer end ofintermediate layer pipeline 3 to stretch into, dock with connectingline 23, its purpose is in order to be as emergent LNG storage space when LNG takes place to leak. Anairtight door 25 for allowing a worker to enter and exit is further provided to thehousing 21. In this embodiment, the connection point of the tank 1 further includes various devices such as meters, electrical devices, and ventilation devices provided in the housing chamber.

Different from the traditional design that the TCS is arranged at the tail part of theend socket 113 of the tank body 1, the side-distributed design of the TCS in the tank body 1 in the embodiment can fully utilize the space in the width direction of the ship body without occupying the space in the length direction required by the installation of the tank body 1, so that the tank body 1 can extend and expand as much as possible along the length direction of the ship body, the volume maximization of the tank body 1 is realized, the loading volume of the tank body 1 is improved, and the enough cruising ability of the marine ship is ensured.

Further, theouter shell 21 is provided on theouter tank 11 in a middle area in the axial direction, that is, between thesaddles 15 in the axial direction, so as to have a distance from theend sockets 113 of theouter tank 11, respectively.

Meanwhile, thehousing 21 is disposed symmetrically with respect to the central axis of theouter vessel 11. Therefore, the center of gravity of the tank body 1 is balanced as much as possible, and the stability of the tank body 1 in the running process of the ship is guaranteed.

Referring to fig. 2, the lower end of theouter casing 21 is located above the lowest point of theouter tank 11, and the upper end of theouter casing 21 is located above the middle of theouter tank 11 to cover the connection portion of theouter tank 11 as much as possible.

Specifically, thehousing 21 includes atop plate 211, anouter shroud 213, abottom plate 215, and abottom side plate 217 connected in series. Wherein thetop plate 211 and thebottom plate 215 are horizontally spaced up and down. Thetop plate 211 is axially located between the top and the middle of theouter tank 11 and is fixedly connected with the outer wall of theouter tank 11, thebottom side plate 217 is arranged at the bottom of theouter tank 11, and thebottom plate 215 is fixedly connected with theouter tank 11 through thebottom side plate 217 so as to be located below the lowest point of theouter tank 11. Theouter shroud 213 is located outside theouter tank 11 and connects thetop plate 211, thebottom plate 215, and the outer wall of theouter tank 11, respectively, to form a sealed receiving chamber.

The outerside enclosing plate 213 comprises aplate 2131 and two enclosingplates 2133 bent from two sides of theplate 2131 and protruding oppositely, wherein the upper and lower ends of theplate 2131 and the two enclosingplates 2133 are respectively welded and fixed with thetop plate 211 and thebottom plate 215. One end of the two enclosingplates 2133, which is far away from theplate 2131, is fixedly welded with the outer side wall of theouter tank 11. In this embodiment, the included angle between theplate 2131 and the surroundingplate 2133 is 90 degrees, and the surroundingplate 2133 is vertically connected to the side wall of theouter tank 11. Of course, the included angle can be adaptively changed according to the use requirement.

Referring again to fig. 1, thesandwich pipe 3 comprises a plurality ofpipe sections 31 which are sequentially connected in a bent manner and are located in theheat insulation sandwich 13. The inner end of theinterlayer pipeline 3 is communicated with the inner tank 12, and the outer end of theinterlayer pipeline 3 penetrates through theouter tank 11 and extends into the accommodating cavity to be connected with the connectingpipeline 23.

Since LNG is a cryogenic liquid, the storage temperature is as low as-163 ℃. However, in the case where the inner tank 12 for storing LNG is loaded and unloaded frequently, the temperature change is large, and the inner tank 12 is structurally contracted by the large temperature difference stress, and is axially displaced with respect to theouter tank 11. The inner tank 12 is connected to 3 one ends of intermediate layer pipeline, andouter jar 11 is connected to the other end, and the pipeline is being stretched by the slope under this operating mode, and easy distortion because of shear stress, pipeline in case destroy just easily produce the problem of revealing, cause the incident.

Consequently, the shearing force that receives when inner andouter jar 11 takes place axial upward relative displacement because of the temperature difference stress can be alleviated in the design of bending of above-mentionedintermediate layer pipeline 3, avoidsintermediate layer pipeline 3 to receive and involves too big and warp, damaged scheduling problem, improves the stress of pipeline, ensures that the normal use of pipeline and guarantees that LNG does not reveal.

Specifically, the plurality oftube segments 31 includes a plurality ofaxial tube segments 31a and a plurality oftransition tube segments 31 b. The plurality ofaxial pipe sections 31a are arranged at intervals in a staggered mode, eachaxial pipe section 31a is parallel to the axial direction of the tank body 1, and two ends of eachtransition pipe section 31b are respectively connected with the two adjacentaxial pipe sections 31a in a bent mode. Finally, the projection of the structure formed by the plurality ofaxial pipe sections 31a and the plurality oftransition pipe sections 31b on the longitudinal section of the tank body 1 is U-shaped or S-shaped. Furthermore, thesandwich pipeline 3 further comprises a plurality of reinforcing members, and each reinforcing member is correspondingly arranged at the joint between the adjacent twoaxial pipe sections 31a and thetransition pipe section 31b so as to improve the connection strength.

The marine tank further comprises two sets ofsupport structures 4 arranged in the insulatingsandwich 13 for connecting the inner tank 12 and theouter tank 11.

Two groups of supportingstructures 4 are distributed at intervals along the axial direction of the tank body 1, each group of supportingstructures 4 comprises a plurality of supportingpipe groups 41 which are distributed along the circumferential direction of the same cross section of the tank body 1, wherein the included angle of the circle center between any two adjacent supportingpipe groups 41 positioned at the lower part of the tank body 1 is smaller than the included angle of the circle center between two supportingpipe groups 41 positioned at the upper part of the tank body 1.

As shown in fig. 2, sixsupport tube groups 41 are arranged at the lower part of the tank body 1, and the sixsupport tube groups 41 are uniformly distributed and have an included angle of 30 degrees. Of course, in other embodiments, the number of thesupport tube groups 41 is not limited, and the arrangement of the plurality ofsupport tube groups 41 below the tank body 1 as many as possible can alleviate the problem of excessive lateral stress caused by the center of gravity shift after TCS side laying.

Referring to fig. 3, a transverse cross-sectional view of thesupport tube group 41 is shown, wherein eachsupport tube group 41 at one axial end of the tank 1 includes: an outervessel fixing pipe 411 protruded on an inner circumferential wall of theouter vessel 11, an innervessel fixing pipe 413 protruded on an outer circumferential wall of the inner vessel 12, and asupport pipe 415. The openings of the two fixing pipes are opposite, and the supportingpipes 415 are respectively correspondingly and fixedly clamped in the outertank fixing pipe 411 and the innertank fixing pipe 413 so as to form a supporting and fixing end between the inner tank 12 and theouter tank 11.

Referring further to fig. 4, each of thesupport tube groups 41 at the other axial end of the tank 1 includes: an outervessel fixing pipe 411 and asupport pipe 415 protruded on an inner circumferential wall of theouter vessel 11. One end of thesupport pipe 415 is fixedly connected to the outer circumferential wall of the inner vessel 12. The other end projects into the outervessel fixing tube 411 and is axially slidable relative to the outervessel fixing tube 411 to form a supporting sliding end between the inner vessel 12 and theouter vessel 11. The function of the supporting sliding end is to allow the displacement of the inner vessel 12 in the direction of the fixed end when the inner vessel 12 is subjected to low temperature contraction.

In summary, the marine liquid tank provided by the invention at least has the following advantages and positive effects:

firstly, thetank body joint 2 is arranged on the side wall of theouter tank 11, compared with the arrangement scheme arranged at the tail part of the tank body 1, the space in the width direction of the ship body is fully utilized, the space in the length direction required by the installation of the tank body 1 is not occupied, the loading volume of the tank body 1 is increased, and the cruising ability of the ship in the marine operation is ensured.

Next, theshell 21 of thetank body joint 2 is disposed in the middle area of theouter tank 11 along the axial direction, that is, between the twosaddles 15, so as to have a distance from the twoend sockets 113 of theouter tank 11, respectively. Meanwhile, theouter shell 21 is symmetrically arranged relative to the middle axis of theouter tank 11; therefore, the center of gravity of the tank body 1 is balanced as much as possible, and the stability of the tank body 1 in the running process of the ship is guaranteed.

Then,intermediate layer pipeline 3 includes a plurality ofconsecutive pipe sections 31 of bending, and the shearing force that receives when the pipeline takes place axial relative displacement because of the temperature difference stress at inner andouter jar 11 can be alleviated in this design of bending, avoidsintermediate layer pipeline 3 to receive and involves too big and warp, damaged scheduling problem, improves the stress of pipeline, ensures that the use of pipeline is normal and guarantees that LNG does not reveal.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (10)

1. A marine tank, comprising:

the tank body comprises an inner tank for storing cryogenic liquid and an outer tank coated outside the inner tank, and a heat insulation interlayer is formed between the inner tank and the outer tank;

the tank body connecting position comprises a shell and a connecting pipeline fixed in the shell; the outer shell is positioned on the side part of the outer tank and extends along the axial direction of the outer tank, the outer shell is arranged on the middle area of the outer tank along the axial direction, and a hollow accommodating cavity is formed by the outer shell and the outer tank in a surrounding manner;

the interlayer pipeline comprises a plurality of sequentially bent and connected pipe sections positioned in the heat insulation interlayer, the inner end of the interlayer pipeline is communicated with the inner tank, and the outer end of the interlayer pipeline penetrates through the outer tank and extends into the containing cavity to be connected with the connecting pipeline.

2. Marine tank according to claim 1, characterized in that:

the shell is located on one side of the central axis of the tank body along the transverse direction of the tank body.

3. Marine tank according to claim 1, characterized in that:

the lower end of the shell exceeds the lowest point of the outer tank, and the upper end of the shell exceeds the middle part of the outer tank.

4. Marine tank according to claim 3, characterized in that:

the shell comprises a top plate, an outer side coaming, a bottom plate and a bottom side plate which are connected in sequence;

the top plate and the bottom plate are horizontally spaced, the top plate is axially positioned between the top and the middle of the outer tank and is fixedly connected with the outer wall of the outer tank, the bottom side plate is arranged at the bottom of the outer tank, and the bottom plate is fixedly connected with the outer tank through the bottom side plate so as to be positioned below the lowest point of the outer tank;

the outer side coaming is located the outside of outer jar to connect respectively the roof, the bottom plate with the outer wall of outer jar to enclose and close and form a sealed chamber of acceping.

5. Marine tank according to claim 4, characterised in that:

the bottom side plate is vertically arranged along a central vertical axis where the lowest point of the outer tank is located.

6. Marine tank according to claim 1, characterized in that:

the plurality of pipe sections comprises a plurality of axial pipe sections and a plurality of transition pipe sections;

the axial pipe sections are arranged at intervals in a staggered mode, each axial pipe section is parallel to the axial direction of the tank body, and two ends of each transition pipe section are respectively connected with two adjacent axial pipe sections in a bending mode.

7. Marine tank according to claim 1, characterized in that:

the sandwich pipe further comprises a plurality of stiffeners;

each reinforcing piece is correspondingly arranged at the joint between two adjacent pipe sections.

8. Marine tank according to claim 1, characterized in that:

the outer tank comprises a cylinder body and two seal heads which are respectively arranged at two axial ends of the cylinder body;

the shell is connected with the cylinder, and the two ends of the shell in the axial direction are respectively spaced from the two seal heads.

9. Marine tank according to claim 8, characterized in that:

the marine liquid tank also comprises two saddles which are distributed at intervals along the axial direction of the tank body, and each saddle is supported and arranged at the bottom of the cylinder body of the outer tank;

the shell is arranged between the two saddles in the axial direction of the tank body.

10. Marine tank according to claim 1, characterized in that:

the marine liquid tank also comprises two groups of supporting structures which are arranged in the heat insulation interlayer and used for connecting the inner tank and the outer tank, and the two groups of supporting structures are distributed at intervals along the axial direction of the tank body;

each group of the supporting structure comprises a plurality of supporting pipe groups which are circumferentially distributed along the same cross section of the tank body, wherein the included angle of the circle center between any two adjacent supporting pipe groups at the lower part of the tank body is smaller than the included angle of the circle center between two adjacent supporting pipe groups at the upper part of the tank body.

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