WO2021196555A1 - 一种设有纵向制荡舱壁的独立液舱结构 - Google Patents

一种设有纵向制荡舱壁的独立液舱结构 Download PDF

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Publication number
WO2021196555A1
WO2021196555A1 PCT/CN2020/120066 CN2020120066W WO2021196555A1 WO 2021196555 A1 WO2021196555 A1 WO 2021196555A1 CN 2020120066 W CN2020120066 W CN 2020120066W WO 2021196555 A1 WO2021196555 A1 WO 2021196555A1
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WO
WIPO (PCT)
Prior art keywords
tank
longitudinal
tank structure
structure according
bulkheads
Prior art date
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PCT/CN2020/120066
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English (en)
French (fr)
Inventor
周清华
蔡乾亚
于瑶
邹继明
Original Assignee
江南造船(集团)有限责任公司
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Application filed by 江南造船(集团)有限责任公司 filed Critical 江南造船(集团)有限责任公司
Priority to KR1020227008609A priority Critical patent/KR102672995B1/ko
Priority to JP2022535130A priority patent/JP7333476B2/ja
Publication of WO2021196555A1 publication Critical patent/WO2021196555A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/24—Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/004—Details of vessels or of the filling or discharging of vessels for large storage vessels not under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/025—Bulk storage in barges or on ships
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B2025/087—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid comprising self-contained tanks installed in the ship structure as separate units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/016—Preventing slosh
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships

Definitions

  • the invention relates to the technical field of liquefied gas transportation, in particular to an independent tank structure provided with a longitudinal sway bulkhead.
  • the liquefied gas carrier is used to transport liquefied gas cargo.
  • the tank is set inside the hull and does not form part of the hull structure. Therefore, it needs to be able to withstand its own weight and the dynamic and static loads of the cargo inside. Various acceleration motions will be generated in the waves, and these motions will also increase the load borne by the tank.
  • the tanks of existing liquefied gas ships are mostly divided into two independent compartments on the left and right.
  • the longitudinal bulkhead members are watertight and have no openings.
  • Each compartment is equipped with a cargo pump for loading and unloading cargo and one for bearing sloshing pressure.
  • the transverse control bulkhead Although this design can meet the structural strength requirements of the tank, it is more expensive and costly.
  • the technical problem to be solved by the present invention is to provide an independent tank structure with reasonable structure and anti-sloshing ability under different loading rates.
  • the invention provides an independent tank structure provided with a longitudinal sway bulkhead, including a tank provided with a cargo pump, and is characterized in that two longitudinal sway control panels are provided in the tank along the length of the tank.
  • the bulkhead, the two longitudinal sway bulkheads are connected by a plurality of horizontal connecting platforms, and the liquid cargo pump is located between the two longitudinal sway bulkheads and penetrates the connecting platform; A plurality of through holes are opened on the longitudinal control bulkhead.
  • a plurality of water flow holes are opened at the bottom of the longitudinal sway bulkhead.
  • the through hole on the longitudinal sway bulkhead includes a plurality of manholes for inspectors to pass through, and the distance between the manhole and the adjacent connecting platform is not more than 400mm.
  • the distance between the liquid cargo pump and the longitudinal sway bulkhead is not less than 600 mm.
  • the liquid cargo pump is connected to the connecting platform through a reinforcing ring, and the vertical distance between the reinforcing ring and the connecting platform is not more than 400 mm.
  • the connecting platform is provided with a plurality of weight-reducing openings extending along the length of the tank, and a liquid cargo pump opening through which the liquid cargo pump penetrates.
  • an air chamber is provided above the liquid tank, the air chamber includes an air chamber neck and an air chamber top plate protruding above the deck, a coaming plate is provided on the deck, and the air chamber top plate and The enclosures are elastically connected by C-type rubber gaskets.
  • a first thermal insulation layer is applied on the neck of the air chamber.
  • the bottom of the liquid tank is provided with a sump, and the bottom of the liquid cargo pump is connected to the bottom plate of the sump through a support part.
  • a second thermal insulation layer is laid on the bottom plate.
  • the advantage of the present invention is that by arranging two perforated longitudinal swaying bulkheads in the tank, and arranging multiple connecting platforms between the two longitudinal swaying bulkheads, it can prevent the sloshing of the liquid cargo against the liquid. Damage is caused to the tank, and it is convenient to overhaul the liquid cargo pump, which reduces the production cost of the ship.
  • Figure 1 is a schematic cross-sectional structure diagram of a ship
  • Figure 2 is a cross-sectional view at A-A in Figure 1;
  • Figure 3 is a schematic diagram of an enlarged structure of the connection platform
  • FIG. 4 is a schematic diagram of an enlarged structure at A in FIG. 3;
  • Figure 5 is a top view of B-B in Figure 1;
  • Figure 6 is a schematic diagram of an enlarged structure of the air chamber
  • Figure 7 is a top view of C-C in Figure 1;
  • Figure 8 is a schematic diagram of an enlarged structure of the liquid collection tank
  • Figure 9 is a top view of D-D in Figure 1;
  • the present invention provides an independent tank structure provided with longitudinal swash bulkheads, including a tank 3 provided with a cargo pump 6, which is an independent tank set in the hull 1.
  • the outer wall is covered with an insulation layer 2 to prevent the low-temperature liquid cargo in the tank 3 from causing the local temperature of the hull 1 to decrease and endanger the structural safety of the hull 1.
  • the tank 3 is provided with two longitudinal swash bulkheads 7 along the length of the tank.
  • the two longitudinal swash bulkheads 7 are arranged in parallel and are symmetrically distributed about the center line of the tank 3.
  • the two longitudinal swash bulkheads 7 are arranged along the liquid The entire length of the tank is extended, dividing the tank 3 into an intermediate tank and two side tanks.
  • the two longitudinal sway bulkheads 7 are connected by a plurality of horizontal and spaced connection platforms 5, and the liquid cargo pump 6 is located between the two longitudinal sway bulkheads 7 (ie, the intermediate compartment) , And run through the connection platform 5.
  • a plurality of through holes are opened on the longitudinal sway bulkhead 7 to connect the middle compartment and the two side compartments, including a plurality of manholes 72 for inspection personnel to pass through.
  • the longitudinal sway bulkhead 7 and the through holes on it allow the cryogenic liquid cargo to sway in the tank 3, but the cryogenic liquid cargo will not produce a large oscillation amplitude, which avoids the excessive shaking of the cryogenic liquid cargo.
  • the large load causes damage to the structure of the tank 3.
  • the longitudinal sway bulkhead 7 also increases the structural strength of the tank 3, and further strengthens the structural safety of the tank 3.
  • a plurality of connecting platforms 5 between the two longitudinal sway bulkheads 7 can not only assist the fixation of the liquid cargo pump 6 and provide an overhaul platform for the maintenance of the liquid cargo pump, but also It supports and strengthens the two longitudinal sway bulkheads 7.
  • the longitudinal sway bulkhead 7 is provided with multiple through holes, the low-temperature liquid cargo can flow between the compartments, and the sloshing of the liquid cargo can be effectively reduced.
  • the tank 3 of the present invention can be provided with two liquid cargo pumps 6 or only one liquid cargo pump. 6. It can meet the needs of loading and unloading liquid cargo while reducing production costs.
  • the longitudinal sway bulkhead 7 is provided with a plurality of bulkhead stiffeners 74 extending up and down and spaced apart as vertical supporting members.
  • the through holes on the longitudinal sway bulkhead 7 mainly include a large through hole 71, a manhole 72 and a water flow hole 73, and each through hole is provided with horizontal reinforcing ribs above and below.
  • the large through holes 71 and the manholes 72 are arranged in a staggered manner to prevent the two from being too close and affecting the structural strength of the longitudinal control bulkhead 7. These holes can help reduce the load on the tank 3 when the cryogenic liquid cargo is sloshing.
  • the size of the manhole 72 is 600x800mm, and the distance between the manhole 72 and the adjacent connecting platform 5 is not more than 400mm, forming a personnel inspection channel.
  • the size of the large through hole 71 can be adjusted according to the actual situation. While meeting the structural strength requirements of the longitudinal sway bulkhead 7, it is also necessary to meet the anti-sloshing requirements.
  • the water hole 73 is opened at the bottom of the longitudinal sway bulkhead 7 for liquid cargo to flow freely at the bottom of the tank 3 to meet the anti-sloshing and liquid cargo pumping requirements at low liquid level. It can be set as a long hole according to needs. Or round holes and other forms.
  • the liquid cargo pump 6 runs through the entire liquid tank 3 in the up and down direction and has a relatively large length, which is disadvantageous to the stability of the liquid cargo pump 6 during operation.
  • the number of connecting platforms 5 can be determined according to the specific length of the liquid cargo pump 6, and generally no less than two.
  • the liquid cargo pump 6 is inserted in the reinforcement ring opening 611 of the reinforcement ring 61.
  • the hexagonal reinforcement ring 61 is connected to the connecting platform 5 through an elastic joint 64, wherein one end of the elastic joint 64 is welded to the connecting platform 5, and the other end
  • the reinforcement ring 61 can limit the displacement of the liquid cargo pump 6 on the horizontal plane, and the elastic joint 64 can play a buffering effect to avoid the vibration caused by the liquid cargo pump 6 when it is working. damage.
  • the vertical distance between the reinforcing ring 61 and the connecting platform 5 is not more than 400 mm, so that there is no need to set steps on the connecting platform 5, which is convenient for inspectors to walk. At the same time, the distance between the liquid cargo pump 6 and the longitudinal control bulkhead 7 is not less than 600mm.
  • the connecting platform 5 is provided with a plurality of weight reduction openings 51 extending along the length of the tank, and a liquid cargo pump opening 52 through which the liquid cargo pump 6 penetrates.
  • the weight reduction opening 51 and the liquid cargo pump opening 52 are both rectangular.
  • the independent liquid tank of the present invention also includes an air chamber 4 arranged on the top of the intermediate tank.
  • the air chamber 4 refers to a raised dome formed by the upward extension of the liquid tank 3.
  • the dome extends from the exposed deck 11 of the hull 1.
  • the upper extension is mainly used for the entry and exit of equipment such as pipelines in the tank 3 and the liquid cargo pump 6, and stores the gas that is vaporized due to changes in the ambient temperature.
  • the air chamber 4 is located directly above the connecting platform 5 (as shown in Fig. 1).
  • the air chamber 4 and the hull 1 are not welded but elastically connected.
  • the air chamber 4 includes an air chamber neck 45 and an air chamber top plate 42 protruding above the deck 11.
  • a coaming plate 44 is fixed on the deck 11. connect.
  • the C-shaped rubber gasket 43 is made of a highly elastic rubber material, it can effectively carry the impact load caused by the relative movement between the tank 3 and the hull 1 and play a buffering role.
  • a support bracket 41 is also provided between the neck 45 of the air chamber and the ceiling 42 of the air chamber, thereby playing a role of local reinforcement.
  • a first thermal insulation layer 21 of a certain thickness is also laid on the outer surface of the neck 45 of the air chamber, and the first thermal insulation layer 21 functions to maintain heat preservation and heat insulation and reduce the evaporation rate of low-temperature liquid cargo.
  • Thermal insulation materials can also be selectively laid on the top plate 42 of the gas chamber, which mainly depends on the type of liquid cargo and the technical requirements of the evaporation rate.
  • the top of the tank 3 is a longitudinal frame type, mainly composed of tank stiffeners 33, specifically flat steel or angle steel commonly used in the shipbuilding industry, in which four top openings 32 are provided, which are mainly used for liquid
  • the top opening 32 is specifically enclosed by the longitudinal swash bulkhead 7 and the tank support 31 using T-shaped material.
  • the top opening 32 is arranged at the top of the middle compartment and communicates with the air chamber 4.
  • a downwardly recessed sump 8 is also provided at the bottom of the tank 3.
  • the sump 8 is mainly used to prevent low-temperature liquid cargo from dispersing at the bottom of the tank 3, so that the low temperature remaining at the bottom of the tank 3 Liquid cargo can be returned and concentrated for easy extraction.
  • the sump 8 is located at the bottom of the intermediate compartment.
  • the bottom of the liquid cargo pump 6 extends into the sump 8, and is connected to the bottom plate 81 of the sump 8 through the support portion 63 to ensure that the bottom of the liquid cargo pump 6 and the bottom plate 81 Keep a certain distance to prevent contact and collision from causing damage.
  • a second insulation layer 22 of a certain thickness is also laid on the outside of the bottom plate 81 to prevent the heat of the hull 1 from being absorbed by the low-temperature liquid cargo and falling to an unsafe temperature range.
  • a reinforcing bracket 83 is also provided between the neck 82 of the sump and the tank 3 to increase the structural strength of the opening of the sump 8.
  • the bottom of the tank 3 is provided with a rectangular bottom opening 34, the four corners of which are designed as guide circles, and the arc radius should be designed to be large enough to meet the fatigue strength requirements;
  • the bulkhead 7 and the tank stiffener 33 are combined and enclosed.
  • the bottom of the cargo pump 6 passes through the bottom opening 34 of the tank and enters the sump.
  • the advantage of the present invention is that by arranging two perforated longitudinal swaying bulkheads in the tank, and arranging multiple connecting platforms between the two longitudinal swaying bulkheads, it can prevent The liquid cargo sloshing causes damage to the liquid tank and facilitates the maintenance of the liquid cargo pump, which reduces the production cost of the ship.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

一种设有纵向制荡舱壁（7）的独立液舱结构，包括设有液货泵（6）的液舱（3），液舱（3）内沿液舱长度方向设有两块纵向制荡舱壁（7），两块纵向制荡舱壁（7）之间通过多个水平的连接平台（5）相连接，液货泵（6）位于两块纵向制荡舱壁（7）之间，并贯穿连接平台（5）；纵向制荡舱壁（7）上开有多个通孔。

Description

一种设有纵向制荡舱壁的独立液舱结构 技术领域
本发明涉及液化气运输技术领域，尤其涉及一种设有纵向制荡舱壁的独立液舱结构。
背景技术
液化气船用于运输液化气货物，液舱设置在船体内部，并不构成船体结构的一部分，因此需要能承受自身的重量和内部装载货物的动、静载荷，在船舶航行的过程中，船舶还会在波浪中产生各类加速度运动，这些运动也会增加液舱所承受的载荷。
现有液化气船的液舱多分为左右两个独立舱室，纵舱壁构件水密且无开孔，每个舱室内各设有一个用于装卸货物的液货泵，以及一个用于承受晃荡压力的横向制荡舱壁。这样的设计虽能满足液舱的结构强度需求，但造价较贵，成本较高。
发明内容
针对上述缺陷，本发明要解决的技术问题是提供一种结构合理、在不同装载率下均具有抗晃荡能力的独立液舱结构。
本发明提供了一种设有纵向制荡舱壁的独立液舱结构，包括设有液货泵的液舱，其特征在于，所述液舱内沿液舱长度方向设有两块纵向制荡舱壁，所述两块纵向制荡舱壁之间通过多个水平的连接平台相连接，所述液货泵位于所述两块纵向制荡舱壁之间，并贯穿所述连接平台；所述纵向制荡舱壁上开有多个通孔。
优选地，所述纵向制荡舱壁的底部开有多个流水孔。
优选地，所述纵向制荡舱壁上的通孔包括多个供检验人员通过的人孔，所述人孔与相邻的连接平台之间的距离不大于400mm。
优选地，所述液货泵与纵向制荡舱壁之间的距离不小于600mm。
优选地，所述液货泵通过加强环与所述连接平台相连接，所述加强环与连接平台之间的垂直距离不大于400mm。
优选地，所述连接平台上开有多个沿液舱长度方向延伸的减重开口，以及供所述液货泵贯穿的液货泵开口。
优选地，在所述液舱的上方设有气室，所述气室包括气室颈部和伸出于甲板之上的气室 顶板，所述甲板上设有围板，所述气室顶板和围板之间通过C型橡胶垫片弹性连接。
优选地，所述气室颈部上敷设有第一保温层。
优选地，所述液舱的底部设有集液槽，所述液货泵的底部通过支撑部与所述集液槽的底板相连接。
优选地，所述底板上敷设有第二保温层。
本发明的有益之处在于，通过在液舱中设置两块开孔的纵向制荡舱壁，并在两块纵向制荡舱壁之间设置多个连接平台，既可以防止液货晃荡对液舱造成损害，又便于对液货泵进行检修，降低了船舶的生产成本。
附图说明
图1为船舶的剖面结构示意图；
图2是图1中A-A处的剖视图；
图3是连接平台的放大结构示意图；
图4是图3中A处的放大结构示意图；
图5是图1中B-B处的俯视图；
图6是气室的放大结构示意图；
图7是图1中C-C处的俯视图；
图8是集液槽的放大结构示意图；
图9是图1中D-D处的俯视图；
元件标号说明：
1   船体
11  甲板
2   液舱保温层
21  第一保温层
22  第二保温层
3   液舱
31  液舱支撑件
32  顶部开口
33  液舱加强筋
34   底部开口
4    气室
41   支撑肘板
42   气室顶板
43   C型橡胶垫片
44   围板
45   气室颈部
5    连接平台
51   减重开口
52   液货泵开口
53   平台加强筋
6    液货泵
61   加强环
611  加强环开口
62   螺栓
63   支撑部
64   弹性接头
7    纵向制荡舱壁
71   大通孔
72   人孔
73   流水孔
74   舱壁加强筋
8    集液槽
81   底板
82   集液槽颈部
83   加强肘板
具体实施方式
下面结合附图对本发明的具体实施方式作进一步详细说明。这些实施方式仅用于说明本 发明，而并非对本发明的限制。
在本发明的描述中，需要说明的是，术语“上”、“下”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
此外，在本发明的描述中，除非另有说明，“多个”的含义是两个或两个以上。
如图1所示，本发明提供了一种设有纵向制荡舱壁的独立液舱结构，包括设有液货泵6的液舱3，液舱3为设置在船体1内的独立舱体，其外壁敷设有保温层2，避免液舱3内的低温液货造成船体1的局部温度降低，危害船体1的结构安全。液舱3内沿液舱长度方向设有两块纵向制荡舱壁7，两块纵向制荡舱壁7平行设置且关于液舱3的中线对称分布，两块纵向制荡舱壁7沿液舱的整个长度延伸，将液舱3分隔为一个中间舱室和两个侧舱室。在中间舱室内，两块纵向制荡舱壁7之间通过多个水平且间隔设置的连接平台5相连接，液货泵6位于两块纵向制荡舱壁7之间(即中间舱室内)，并贯穿连接平台5。如图2所示，纵向制荡舱壁7上开有多个通孔，可以连通中间舱室和两个侧舱室，其中包括多个供检验人员通过的人孔72。纵向制荡舱壁7及其上的通孔允许低温液货在液舱3内晃动，但低温液货不会产生很大的摆动幅度，避免了因为低温液货的晃动幅度过大而产生较大载荷，对液舱3的结构造成损坏。同时，纵向制荡舱壁7也增加了液舱3的结构强度，进一步强化了液舱3的结构安全。相较于常规的横向制荡舱壁结构，在两块纵向制荡舱壁7之间设置多个连接平台5既可以辅助液货泵6的固定，为液货泵维护提供检修平台，又可以对两块纵向制荡舱壁7起到支撑加强作用。此外，由于纵向制荡舱壁7上设有开有多个通孔，低温液货可以在各舱室之间流动，又能有效消减液货的晃荡。同时，相较于用一块水密纵舱壁划分成两个独立舱室的现有液舱结构，在本发明的液舱3中既可以设置两个液货泵6，也可以只设置一个液货泵6，在降低了生产成本的同时能够满足装卸液货的需要。
如图2所示，纵向制荡舱壁7上设有多个上下延伸且间隔设置的舱壁加强筋74作为垂向 支撑构件。纵向制荡舱壁7上的通孔主要包括大通孔71、人孔72和流水孔73，每个通孔的上下方均设有横向的加强筋。其中大通孔71和人孔72交错布置，避免两者距离过近，影响纵向制荡舱壁7的结构强度。这些孔均可以在低温液货晃荡时帮助降低液舱3所受的载荷。其中，人孔72的大小为600x800mm，与相邻的连接平台5之间的间距不大于400mm，形成人员检验通道。大通孔71的尺寸大小可根据实际情况进行调整，在满足纵向制荡舱壁7的结构强度要求的同时也要需要满足抗晃荡要求。流水孔73开设在纵向制荡舱壁7的底部，供液货在液舱3的底部自由流动，满足低液位时的抗晃荡和液货泵的抽取需求，其可以根据需要设置为长孔或圆形孔等多种形式。
如图3-5所示，液货泵6沿上下方向贯穿整个液舱3，长度较大，这对液货泵6工作时的稳定性不利。为了减少液货泵6过长的影响，连接平台5的数量可以根据液货泵6的具体长度来确定，一般不少于两个。液货泵6穿设在加强环61的加强环开口611中，六边形的加强环61通过弹性接头64与连接平台5相连接，其中弹性接头64的一端焊接在连接平台5上，另一端通过螺栓62与加强环61紧固连接，加强环61可以限制液货泵6在水平面上的位移，而弹性接头64则可以起到缓冲作用，避免液货泵6工作时产生的振动对结构造成损坏。加强环61与连接平台5之间的垂直距离不大于400mm，这样就无需在连接平台5上设置踏步，方便检查人员行走。同时，液货泵6与纵向制荡舱壁7之间的间距不小于600mm，若液货泵6的数量为两个，两个液货泵6之间的距离不小于800mm，从而为检查人员提供足够的行走空间。连接平台5上开有多个沿液舱长度方向延伸的减重开口51，以及供液货泵6贯穿的液货泵开口52，减重开口51和液货泵开口52均呈矩形。
如图6所示，本发明的独立液舱还包括设置在中间舱室顶部的气室4，气室4是指液舱3向上延伸形成的凸起的穹顶，该穹顶从船体1的露天甲板11上伸出，主要用于液舱3中的管道和液货泵6等设备进出，并储存因周围环境温度变化而气化的气体。气室4位于连接平台5的正上方(如图1所示)。气室4和船体1之间并非焊接连接，而是弹性连接。具体地，气室4包括气室颈部45和伸出于甲板11之上的气室顶板42，甲板11上固定有围板44，气室顶板42通过C型橡胶垫片43与围板44弹性连接。由于C型橡胶垫片43采用高弹性的橡胶材料制成，其可有效地承载液舱3与船体1之间的相对运动引起的冲击载荷，起到缓冲作用。在气室颈部45和气室顶板42之间还设置了支撑肘板41，从而起到局部加强的作用。优选地，在气室颈部45的外表面还敷设有一定厚度的第一保温层21，第一保温层21起到保温绝热、减小低温液货蒸发率的作用。气室顶板42上也可选择性地敷设保温材料，这主要取决于液货 的种类和蒸发率的技术要求，如承载-54℃的丙烷时，则不需要在气室顶板42上敷设保温材料，但承载更低温度的液货，如-104℃的乙烯或-163℃的甲烷时，则需要在气室顶板42上敷设保温材料。同时，液货的温度越低，保温材料的厚度则越大。
如图7所示，液舱3的顶部为纵骨架式，主要由液舱加强筋33组成，具体地为船舶行业常用的扁钢或角钢，其中设置有四个顶部开口32，主要用于液舱中的管道和液货泵等设备的进出，顶部开口32具体地由纵向制荡舱壁7和采用了T型材的液舱支撑件31围成。顶部开口32设置在中间舱室的顶部，并与气室4相通。
如图8所示，在液舱3的底部还设置有向下凹陷的集液槽8，集液槽8主要是防止低温液货在液舱3的底部分散，使得液舱3底部残留的低温液货可以回流并集中，便于抽取。集液槽8位于中间舱室的底部，液货泵6的底部伸入集液槽8中，并通过支撑部63与集液槽8的底板81相连接，保证液货泵6的底部与底板81保持一定距离，防止接触碰撞，造成损坏。底板81的外侧还敷设有一定厚度的第二保温层22，防止船体1的热量被低温液货吸收，下降至不安全的温度范围。在集液槽颈部82与液舱3之间还设置有加强肘板83，用于增加集液槽8开口处的结构强度。
如图9所示，液舱3的底部设置有呈矩形的底部开口34，其四角均作导圆设计，圆弧半径应设计的足够大，以满足抗疲劳强度要求；其周围由纵向制荡舱壁7和液舱加强筋33组合围成。液货泵6的底部穿过液舱底部开口34进入集液槽中。
综上所述，本发明的有益之处在于，通过在液舱中设置两块开孔的纵向制荡舱壁，并在两块纵向制荡舱壁之间设置多个连接平台，既可以防止液货晃荡对液舱造成损害，又便于对液货泵进行检修，降低了船舶的生产成本。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和替换，这些改进和替换也应视为本发明的保护范围。

Claims (10)

  1. 一种设有纵向制荡舱壁的独立液舱结构，包括设有液货泵(6)的液舱(3)，其特征在于，所述液舱(3)内沿液舱长度方向设有两块纵向制荡舱壁(7)，所述两块纵向制荡舱壁(7)之间通过多个水平的连接平台(5)相连接，所述液货泵(6)位于所述两块纵向制荡舱壁(7)之间，并贯穿所述连接平台(5)；所述纵向制荡舱壁(7)上开有多个通孔。
  2. 根据权利要求1所述的独立液舱结构，其特征在于，所述纵向制荡舱壁(7)的底部开有多个流水孔(73)。
  3. 根据权利要求1所述的独立液舱结构，其特征在于，所述纵向制荡舱壁(7)上的通孔包括多个供检验人员通过的人孔(72)，所述人孔(72)与相邻的连接平台(5)之间的距离不大于400mm。
  4. 根据权利要求1所述的独立液舱结构，其特征在于，所述液货泵(6)与纵向制荡舱壁(7)之间的距离不小于600mm。
  5. 根据权利要求1所述的独立液舱结构，其特征在于，所述液货泵(6)通过加强环(61)与所述连接平台(5)相连接，所述加强环(61)与连接平台(5)之间的垂直距离不大于400mm。
  6. 根据权利要求1所述的独立液舱结构，其特征在于，所述连接平台(5)上开有多个沿液舱长度方向延伸的减重开口(51)，以及供所述液货泵(6)贯穿的液货泵开口(52)。
  7. 根据权利要求1所述的独立液舱结构，其特征在于，在所述液舱(3)的上方设有气室(4)，所述气室(4)包括气室颈部(45)和伸出于甲板(11)之上的气室顶板(42)，所述甲板(11)上设有围板(44)，所述气室顶板(42)和围板(44)之间通过C型橡胶垫片(43)弹性连接。
  8. 根据权利要求7所述的独立液舱结构，其特征在于，所述气室颈部(45)上敷设有第一保温层(21)。
  9. 根据权利要求1所述的独立液舱结构，其特征在于，所述液舱(3)的底部设有集液槽(8)，所述液货泵(6)的底部通过支撑部(63)与所述集液槽(8)的底板(81)相连接。
  10. 根据权利要求9所述的独立液舱结构，其特征在于，所述底板(81)上敷设有第二保温层(22)。
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