CN105818928A - Independent liquid cargo tank and liquefied gas carrier - Google Patents
Independent liquid cargo tank and liquefied gas carrier Download PDFInfo
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- CN105818928A CN105818928A CN201510005107.XA CN201510005107A CN105818928A CN 105818928 A CN105818928 A CN 105818928A CN 201510005107 A CN201510005107 A CN 201510005107A CN 105818928 A CN105818928 A CN 105818928A
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- flow container
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- liquid cargo
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Abstract
The invention provides an independent liquid cargo tank and a liquefied gas carrier. The independent liquid cargo tank combines advantages of a double-lug-shaped and cylindrical independent liquid cargo tanks and comprises three cylindrical liquid tanks connected with each other to form a novel three-lug-shaped independent liquid cargo tank. Compared with a traditional double-lug independent liquid cargo tank, maximization of cargo tank capacity can be met, tank body space can be better utilized and economic benefits can be improved. Each connected part of the liquid tanks is provided with a longitudinal bulkhead; the three longitudinal bulkheads are all Y-shaped, so rigidity, strength and stability of the independent cargo tank can be enhanced and stress concentration can be reduced due to a size design; a first through hole and a second through hole of a V-shaped part of the Y-shaped longitudinal bulkheads connect the liquid tank over and two liquid tanks under; the two liquid tanks under are liquid-tightly separated via an I-shaped part, so gravity inclination due to a large free surface can be avoided; a gas-phase connection device can be unnecessary; and stability and transportation safety of the independent liquid cargo tank and the liquefied gas carrier can be guaranteed.
Description
Technical field
The present invention relates to a kind of ships that transport, particularly relate to a kind of independent liquid cargo tank and liquefied gas carrier.
Background technology
Liquefied gas carrier is a kind of high added value boats and ships, and storage and means of transportation according to liquefied gas are different and substantially can be divided three classes: full voltage type, half-cold, half pressure type and full-cool three kinds.The goods of liquefied gas ship is loaded in the independent liquid cargo tank of thermal break cladding with the state less than room temperature, and ship is provided with the reliquefaction installation of control cargo temperature/pressure.
Independent liquid cargo tank is not intended that a part for Ship Structure, can bear own wt and the quiet dynamic load produced by liquid goods, has A type, Type B and c-type 3 kinds dissimilar.The flow container shape of A type independent liquid cargo tank is the most prismatic, for full-cool liquefied gas carrier；The flow container of common Type B independent tank is spherical, it is also possible to be prismatic；The generally cylindrical cross section sleeping tank of flow container of c-type independent liquid cargo tank or spherical tank.Independent liquid cargo tank can use single cylindrical shape flow container, in prior art, in order to further with the space of hull, improve volume of compartment utilization rate, frequently with duplex cylindrical shape flow container, the most usually said ears type independent liquid cargo tank.The end socket pattern of independent liquid cargo tank is generally dome head, in order to shorten cargo tank length, it is also contemplated that use dished (torispherical) head.
Liquefied gas carrier is usually arranged type boats and ships, requirement to volume of compartment is higher, the selection of principal dimensions to consider in terms of general arrangement (volume of compartment and layout status) and ship performance etc., the most both need to meet the use requirement of boats and ships, make ship cabin arrangement reasonable, make boats and ships have good resistance performance again.The principal dimensions of boats and ships is chosen and is played a decisive role by the size of independent liquid cargo tank, and the principal dimensions of boats and ships have impact on again the size of flow container, and the two mutually restricts, and influences each other.Along with increase to liquefied gas demand in productive life, having higher requirement the delivered payload capability of equivalently-sized liquefied gas carrier, under the conditions of Ship's Principal Dimensions is fixed, ears type independent liquid cargo tank the most gradually can not meet these requirements.Accordingly, it would be desirable to consider arrangement and the profile of a kind of novel independent liquid cargo tank, both met the principal dimensions requirement of hull, the utilization rate of volume of compartment can be made again to reach optimal.
Due to the particularity of carrying liquefied gases, not only the carrier environments of cargo tank there is is particular/special requirement, the most also require that independent liquid cargo tank has enough stiffness and strengths and stability.
For traditional ears type independent liquid cargo tank, if constituting between two flow containers of ears type is liquid phase connection, then can there is bigger free surface, in the motor process of boats and ships, the flowing of free surface can cause liquid center of gravity to tilting a side shifting, thus generation heeling moment, reduce the stability of boats and ships, be unfavorable for the safety of liquefied gas carrier.If being liquid-tight isolation each other between two flow containers, gas phase to be used connection replaces liquid phase connection, but in current designs, between two flow containers, gas phase to be realized connection then needs to configure the communication apparatus such as special gas phase communicating pipe at cargo tank top.
Summary of the invention
The shortcoming of prior art in view of the above, the technical problem to be solved in the present invention is to provide a kind of independent liquid cargo tank and liquefied gas carrier, can more fully utilize hull space, improve volume of compartment utilization rate, stability and the safety of liquefied gas carrier transport of independent liquid cargo tank can also be improved simultaneously.
For achieving the above object and other relevant purposes, the present invention provides a kind of independent liquid cargo tank, it is installed on liquefied gas carrier, described independent liquid cargo tank includes three columnar flow containers passed through mutually, described flow container above is the first flow container, and two the described flow containers being positioned at lower section are respectively the second flow container and the 3rd flow container；Described independent liquid cargo tank with the center line face of described liquefied gas carrier for the plane of symmetry symmetrically shape, the central axis of described second flow container and the 3rd flow container all with described middle parallel line surface, the central axis of described first flow container is positioned at described center line face；In the radial section of described independent liquid cargo tank, the radius of three described flow containers is R, and the center of circle of described first flow container is O1, the center of circle of described second flow container and the 3rd flow container is respectively O2And O3, O2O3The half of length is S1, O1To O2O3The vertical dimension of line is S2, S1 < 0.7*R, S2≤1.2*S1.
Preferably, inside at described independent liquid cargo tank, the place of passing through mutually of described first flow container and the second flow container is provided with the first longitudinal bulkhead, and the place of passing through mutually of described first flow container and the 3rd flow container is provided with the second longitudinal bulkhead, and the place of passing through mutually of described second flow container and the 3rd flow container is provided with the 3rd longitudinal bulkhead；Described first longitudinal bulkhead, the second longitudinal bulkhead and the 3rd longitudinal bulkhead are connected at described center line face, and in the radial section of described independent liquid cargo tank, the junction point of described first longitudinal bulkhead, the second longitudinal bulkhead and the 3rd longitudinal bulkhead is O, OO1A length of S3, S3=(S12+S22)/(2*S2)；Described first longitudinal bulkhead is perpendicular to O1O2, described second longitudinal bulkhead is perpendicular to O1O3。
It is further preferred that be communicated with the first intercommunicating pore of described second flow container and the first flow container on described first longitudinal bulkhead, described second longitudinal bulkhead is communicated with described 3rd flow container and the second intercommunicating pore of the first flow container；Described 3rd longitudinal bulkhead is by described second flow container and the 3rd liquid-tight isolation of flow container.
Preferably, described first intercommunicating pore and the second intercommunicating pore are symmetrical arranged more one step relative to described center line face.
Preferably, the top of described first flow container is provided with two cylindrical air chambers symmetrical relative to described center line face, the central axis of described air chamber is positioned at and the perpendicular of described middle parallel line surface, the central axis of described air chamber is S4 to the distance in described center line face, the radius of described air chamber is r, S4=S1-r；The bottom of described second flow container and the 3rd flow container and each described air chamber are correspondingly each provided with a hydrops groove, and the central axis of described air chamber by being positioned at the hydrops groove of described center line face homonymy with described air chamber.
It is further preferred that be provided with motor in described air chamber, in described hydrops groove, it is provided with hydraulic pump, is connected by a vertical power transmission shaft between described motor and hydraulic pump.
Preferably, each described flow container is equipped with dome head, and the radius of described dome head is R.
The present invention also provides for a kind of liquefied gas carrier, and described liquefied gas carrier is installed above-mentioned independent liquid cargo tank.
As mentioned above, the independent liquid cargo tank of the present invention and liquefied gas carrier, have the advantages that independent liquid cargo tank uses three cylindrical shape flow containers passed through mutually to constitute three ears tank form (isosceles triangle), hull space can be made to be more fully utilized compared with traditional ears type independent liquid cargo tank, volume of compartment utilization rate is higher.Being arranged at each flow container inside independent liquid cargo tank and passing through the longitudinal bulkhead at place mutually is Y type, can either strengthen the rigidity of independent liquid cargo tank, strength and stability, and its size design can also effectively reduce the concentrated stress of longitudinal bulkhead and flow container housing junction.First intercommunicating pore of Y type longitudinal bulkhead V-type part and the second intercommunicating pore achieve top flow container and connect with the liquid phase between the flow container of two, lower section respectively, I type part achieves the liquid-tight isolation between two flow containers in lower section, avoid the center of gravity inclination that the big free surface formed between two flow containers in ears type independent liquid cargo tank causes due to liquid phase connection, or need, due to gas phase connection, the gas phase communication apparatus set up, it is ensured that independent liquid cargo tank and the stability of liquefied gas carrier transport and safety.
Accompanying drawing explanation
Longitudinal front view of the independent liquid cargo tank that Fig. 1 is shown as in the present invention.
Longitudinal top view of the independent liquid cargo tank that Fig. 2 is shown as in the present invention.
Fig. 3 is shown as along Fig. 1 the vertical sectional view along line A-A.
Element numbers explanation
1 first flow container
2 second flow containers
3 the 3rd flow containers
4 center line faces
5 first longitudinal bulkheads
6 second longitudinal bulkheads
7 the 3rd longitudinal bulkheads
81 air chambers
82 hydrops grooves
9 dome heads
Detailed description of the invention
Below by way of specific instantiation, embodiments of the present invention being described, those skilled in the art can be understood other advantages and effect of the present invention easily by the content disclosed by this specification.The present invention can also be carried out by the most different detailed description of the invention or apply, and the every details in this specification can also carry out various modification or change based on different viewpoints and application under the spirit without departing from the present invention.
Refer to Fig. 1 to Fig. 3.It should be noted that, diagram provided in the present embodiment illustrates the basic conception of the present invention the most in a schematic way, component count, shape and size when only showing the assembly relevant with the present invention rather than implement according to reality in the most graphic are drawn, during its actual enforcement, the kenel of each assembly, quantity and ratio can be a kind of random change, and its assembly layout kenel is likely to increasingly complex.
For sake of convenience, in literary composition, direction is defined as follows: along hull height direction, is vertical from ship top to hull bottom direction, and the direction pointing to ship top is top, and the direction pointing to hull bottom is lower section；Along beam of hull direction, it is horizontal from hull larboard to starboard；Along ship length direction, it is longitudinally from stem to ship stern direction.The structure of the present invention is not played any restriction effect by the definition of above-mentioned direction.
The independent liquid cargo tank that the present invention provides is on the basis of the independent liquid cargo tank of ears type flow container, a kind of novel independent liquid cargo tank of proposition.Two flow containers passed through mutually of ears type independent liquid cargo tank are the most horizontally arranged, refer to Fig. 1 to Fig. 3, the independent liquid cargo tank that the present invention provides is further added by a cylindrical shape flow container above ears type independent liquid cargo tank, and three cylindrical shape flow containers pass through mutually with the structure of isosceles triangle in the horizontal.Flow container above is the first flow container, be positioned at lower section two and Drainage tank be respectively the second flow container and the 3rd flow container.The central axis of each flow container extends longitudinally.
As shown in Figures 2 and 3, independent liquid cargo tank is installed on liquefied gas carrier, and independent liquid cargo tank is with the center line face of liquefied gas carrier for the plane of symmetry symmetrically shape, and the center line face of independent liquid cargo tank overlaps with the center line face of liquefied gas carrier, is referred to as center line face.The central axis of the second flow container and the 3rd flow container all with middle parallel line surface, the central axis of the first flow container is positioned at center line face.As it is shown on figure 3, in the radial section (vertical cross section) of independent liquid cargo tank, the radius of three flow containers is R.On the premise of hull size allows, each flow container is equipped with dome head effectively to increase volume of compartment, and the radius of this dome head is also R.The center of circle (center of curvature) of the first flow container is O1, the center of circle (center of curvature) of the second flow container and the 3rd flow container is respectively O2And O3。O2O3The half of length is S1, and two flow containers (the second flow container and the 3rd flow container) the respective central axis being i.e. positioned at lower section is S1 to the air line distance in center line face.O1To O2O3The vertical dimension of line is S2.By simulation calculation and experimental verification, realizing the maximization of volume of compartment utilization rate under the conditions of fixed Ship's Principal Dimensions for making the size design of independent liquid cargo tank meet, the size of independent liquid cargo tank should meet following condition: S1 < 0.7*R, S2≤1.2*S1.
For ensureing the rigidity of independent liquid cargo tank, strength and stability, independent liquid cargo tank is internally provided with the longitudinal bulkhead for supporting flow container housing.In the present invention, the longitudinal bulkhead of the inside being arranged at independent liquid cargo tank is Y type, and this Y type longitudinal bulkhead includes the first longitudinal bulkhead, the second longitudinal bulkhead and the 3rd longitudinal bulkhead three part.The place of passing through mutually of the first flow container and the second flow container is provided with the first longitudinal bulkhead, and the place of passing through mutually of the first flow container and the 3rd flow container is provided with the second longitudinal bulkhead, and the place of passing through mutually of the second flow container and the 3rd flow container is provided with the 3rd longitudinal bulkhead.First longitudinal bulkhead, the second longitudinal bulkhead constitute the V-type part in Y type longitudinal bulkhead；3rd longitudinal bulkhead constitutes the I type part in Y type longitudinal bulkhead.First longitudinal bulkhead, the second longitudinal bulkhead and the 3rd longitudinal bulkhead are connected at center line face.As it is shown on figure 3, in the radial section (vertical cross section) of independent liquid cargo tank, the junction point of the first longitudinal bulkhead, the second longitudinal bulkhead and the 3rd longitudinal bulkhead is O.O1It is positioned at the top of O, OO1Straight length be S3.
Passing through place mutually at each flow container, the place that the most each longitudinal bulkhead is connected with the housing of flow container is easy to stress concentration phenomenon occur, and in the transportation of low pressure liquefied gas ship, the concentrated stress at flow container housing can cause rupturing of flow container housing, affects ship transportation safety.By simulation calculation and experimental verification, will reduce flow container stress concentration degree, the size design of longitudinal bulkhead should meet: S3=(S1 as far as possible2+S22)/(2*S2), the first longitudinal bulkhead is perpendicular to O1O2Line, the second longitudinal bulkhead is perpendicular to O1O3Line.3rd longitudinal bulkhead is placed exactly on the center line face of hull, so being also perpendicularly to O2O3。
If between the second flow container and the 3rd flow container being liquid phase connection, then the horizontal plane at O point place will constitute the internal maximum free surface of independent liquid cargo tank.Liquid centre-of gravity shift is caused because of the flowing of big free surface for preventing liquefied gas carrier operationally, and then cause the reduction of liquefied gas carrier stability, between the second flow container and the 3rd flow container, the 3rd longitudinal bulkhead of (I type part) serves the effect of liquid-tight isolation, has blocked the liquid phase connection between the second flow container and the 3rd flow container；First longitudinal bulkhead is provided with the first intercommunicating pore, and the second longitudinal bulkhead is provided with the second intercommunicating pore, makes the first flow container respectively at connecting with formation liquid phase between the second flow container and the 3rd flow container.First intercommunicating pore and the second intercommunicating pore can be respectively one or more, and can be symmetrical arranged relative to center line face.
In independent liquid cargo tank, the free surface of O point place horizontal plane and not up to O point place horizontal plane is divided into two liquid levels independent of each other by the 3rd longitudinal bulkhead.For the liquid level higher than O point place horizontal plane, owing to the flow container of independent liquid cargo tank is to a cylinder transition from duplex cylinder, free surface starts to be gradually reduced, therefore in the independent liquid cargo tank that the present invention provides, aforesaid big free surface can't occur, can effectively reduce the harmful effect of the big free surface brought because of the connection of the liquid phase of independent liquid cargo tank, improve the safety and stability of independent liquid cargo tank.It addition, such setting can also improve does not connects, between two of ears type independent liquid cargo tank and Drainage tank, the present situation that can only be connected by gas phase due to liquid phase, it is not necessary to configure gas phase communication apparatus again between each flow container.
The top vertical of the first flow container is provided with two cylindrical air chamber symmetrical relative to center line face, the central axis of air chamber is positioned at and the perpendicular of middle parallel line surface, the central axis of air chamber is S4 to the air line distance in center line face, and the radius of air chamber is r, meets S4=S1-r.The bottom of the second flow container and the 3rd flow container is each provided with a hydrops groove.The central axis of air chamber is by being positioned at the hydrops groove of center line face homonymy therewith.Being provided with motor in air chamber, be provided with hydraulic pump in hydrops groove, be connected by a vertical power transmission shaft between motor with hydraulic pump, such position of air chamber and hydrops groove arranges the layout being more beneficial for liquid pump and motor.
The present invention also provides for a kind of liquefied gas carrier, is equiped with independent liquid cargo tank as above on this liquefied gas carrier.
In sum, the independent liquid cargo tank that the present invention provides, combine ears type flow container and the advantage of cylindrical shape flow container, form the independent liquid cargo tank of a kind of three novel ears tank form (isosceles triangle).Three cylindrical shape flow containers pass through mutually, enable independent liquid cargo tank to meet the maximization of volume of compartment under the conditions of fixed Ship's Principal Dimensions by the liquid tank structure size of simulation calculation and experimental verification, utilize hull space more fully.Compared with ears type independent liquid cargo tank, in the case of reaching identical volume of compartment, reduce flow container weight, reduce Ship's Principal Dimensions, improve economic benefit.Being arranged at the Y type longitudinal bulkhead within independent liquid cargo tank to be not only able to strengthen the rigidity of independent liquid cargo tank, strength and stability, its size design can also reduce the medium harmful effect of stress collection that longitudinal bulkhead may bring effectively, it is ensured that the safety of liquefied gas carrier transport.In addition, it is opened in the intercommunicating pore of V-type part in the longitudinal bulkhead of Y type to be connected with the second flow container and the 3rd flow container liquid phase respectively by the first flow container, avoid the center of gravity tilt phenomenon that ears type independent liquid cargo tank brings due to the big free surface of liquid phase connection formation, set up gas phase communication apparatus without for realizing gas phase connection.The independent liquid cargo tank that the present invention provides is particularly suitable for use with the various liquefied gas carriers of large-scale c-type independent liquid cargo tank.The liquefied gas carrier being equiped with above-mentioned independent liquid cargo tank that the present invention provides also has above advantage.So, the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The principle of above-described embodiment only illustrative present invention and effect thereof, not for limiting the present invention.Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by any person skilled in the art.Therefore, art has all equivalence modification or changes that usually intellectual is completed under without departing from disclosed spirit and technological thought such as, must be contained by the claim of the present invention.
Claims (8)
1. an independent liquid cargo tank, it is installed on liquefied gas carrier, it is characterized in that: described independent liquid cargo tank includes three columnar flow containers passed through mutually, and described flow container above is the first flow container, two the described flow containers being positioned at lower section are respectively the second flow container and the 3rd flow container；Described independent liquid cargo tank with the center line face of described liquefied gas carrier for the plane of symmetry symmetrically shape, the central axis of described second flow container and the 3rd flow container all with described middle parallel line surface, the central axis of described first flow container is positioned at described center line face；In the radial section of described independent liquid cargo tank, the radius of three described flow containers is R, and the center of circle of described first flow container is O1, the center of circle of described second flow container and the 3rd flow container is respectively O2And O3, O2O3The half of length is S1, O1To O2O3The vertical dimension of line is S2, S1 < 0.7*R, S2≤1.2*S1.
Independent liquid cargo tank the most according to claim 1, it is characterized in that: in the inside of described independent liquid cargo tank, the place of passing through mutually of described first flow container and the second flow container is provided with the first longitudinal bulkhead, the place of passing through mutually of described first flow container and the 3rd flow container is provided with the second longitudinal bulkhead, and the place of passing through mutually of described second flow container and the 3rd flow container is provided with the 3rd longitudinal bulkhead；Described first longitudinal bulkhead, the second longitudinal bulkhead and the 3rd longitudinal bulkhead are connected at described center line face, and in the radial section of described independent liquid cargo tank, the junction point of described first longitudinal bulkhead, the second longitudinal bulkhead and the 3rd longitudinal bulkhead is O, OO1A length of S3, S3=(S12+S22)/(2*S2)；Described first longitudinal bulkhead is perpendicular to O1O2, described second longitudinal bulkhead is perpendicular to O1O3。
Independent liquid cargo tank the most according to claim 2, it is characterized in that: on described first longitudinal bulkhead, be communicated with the first intercommunicating pore of described second flow container and the first flow container, described second longitudinal bulkhead is communicated with described 3rd flow container and the second intercommunicating pore of the first flow container；Described 3rd longitudinal bulkhead is by described second flow container and the 3rd liquid-tight isolation of flow container.
Independent liquid cargo tank the most according to claim 3, it is characterised in that: described first intercommunicating pore and the second intercommunicating pore are symmetrical arranged relative to described center line face.
Independent liquid cargo tank the most according to claim 1, it is characterized in that: the top of described first flow container is provided with two cylindrical air chambers symmetrical relative to described center line face, the central axis of described air chamber is positioned at and the perpendicular of described middle parallel line surface, the central axis of described air chamber is S4 to the distance in described center line face, the radius of described air chamber is r, S4=S1-r；The bottom of described second flow container and the 3rd flow container and each described air chamber are correspondingly each provided with a hydrops groove, and the central axis of described air chamber by being positioned at the hydrops groove of described center line face homonymy with described air chamber.
Independent liquid cargo tank the most according to claim 5, it is characterised in that: it is provided with motor in described air chamber, in described hydrops groove, is provided with hydraulic pump, be connected by a vertical power transmission shaft between described motor and hydraulic pump.
Independent liquid cargo tank the most according to claim 1, it is characterised in that: each described flow container is equipped with dome head, and the radius of described dome head is R.
8. a liquefied gas carrier, it is characterised in that: install just like the independent liquid cargo tank according to any one of claim 1 to 7 on described liquefied gas carrier.
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| CN201510005107.XA CN105818928B (en) | 2015-01-06 | 2015-01-06 | A kind of independent liquid cargo tank and liquefied gas carrier |
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| CN201510005107.XA CN105818928B (en) | 2015-01-06 | 2015-01-06 | A kind of independent liquid cargo tank and liquefied gas carrier |
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| CN105818928A true CN105818928A (en) | 2016-08-03 |
| CN105818928B CN105818928B (en) | 2017-12-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108153992A (en) * | 2018-01-17 | 2018-06-12 | 江南造船(集团)有限责任公司 | Modeling method, system, storage medium and the electronic equipment of cargo tank |
| CN112319705A (en) * | 2020-11-13 | 2021-02-05 | 上海海威斯特保温工程有限公司 | Enhanced spraying type heat insulation system of C-shaped LNG liquid cargo tank and construction method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108153992A (en) * | 2018-01-17 | 2018-06-12 | 江南造船(集团)有限责任公司 | Modeling method, system, storage medium and the electronic equipment of cargo tank |
| CN108153992B (en) * | 2018-01-17 | 2021-08-06 | 江南造船(集团)有限责任公司 | Modeling method and system of liquid cargo tank, storage medium and electronic equipment |
| CN112319705A (en) * | 2020-11-13 | 2021-02-05 | 上海海威斯特保温工程有限公司 | Enhanced spraying type heat insulation system of C-shaped LNG liquid cargo tank and construction method thereof |
| CN112319705B (en) * | 2020-11-13 | 2022-05-10 | 上海海威斯特保温工程有限公司 | C-shaped LNG liquid cargo tank spraying type heat insulation system and construction method thereof |
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| CN105818928B (en) | 2017-12-05 |
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