CN111409777A

CN111409777A - Ballast tank structure with communicating pipeline

Info

Publication number: CN111409777A
Application number: CN202010279893.3A
Authority: CN
Inventors: 王璐玭; 柳卫东; 樊涛
Original assignee: Jiangnan Shipyard Group Co Ltd
Current assignee: Jiangnan Shipyard Group Co Ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-07-14
Anticipated expiration: 2040-04-10
Also published as: CN111409777B

Abstract

The invention belongs to a ballast tank structure with a communication pipeline in the field of ship arrangement in the field of ship manufacturing, and the technical scheme is as follows: a top ballast tank disposed between the main deck and the hull shell adjacent the cargo hold; a bottom ballast tank disposed between the hull shell and the bottom of the vessel adjacent the cargo hold; the top ballast water tank and the bottom ballast water tank are symmetrically arranged at the two sides of the ship; the top water ballast tank and the bottom water ballast tank on the same side are hermetically connected through a first communication pipeline, suction ports are uniformly distributed in the bottom water ballast tanks and the cargo hold on the two sides, and pressure control valves are arranged in the cargo hold; the pressure control valve and the suction port are hermetically connected through a second communication pipeline. The design of the ballast tank structure reduces the main scale requirement of ships accommodated in the same tank, improves the energy efficiency of the ships, reduces the fuel consumption of the ships and reduces the operation cost of shipowners.

Description

Ballast tank structure with communicating pipeline

Technical Field

The invention relates to the field of ship arrangement in the field of ship manufacturing, in particular to a ballast tank structure.

Background

At present, the world gas energy consumption and the demand of gas chemical raw materials are in a continuous rising trend, which brings great development opportunities for the development of liquefied gas transport ships (liquefied gas ships for short). Under the international situation, research and development efforts on liquefied gas ships are increased by ship design units.

In the process of designing and producing a liquefied gas carrier, the stability of the cargo hold area is important. In order to improve the stability of the broken ballast tank of the ship, a design scheme of double ballast tank shells in a cargo compartment area is often adopted, and the width of the double shells in the common arrangement of the double shells of the ballast tank needs to be more than one fifth of the width of the double shells. The design scheme has low utilization rate of the hold capacity of the cargo hold, needs to increase the length and the width of a cargo hold area for designing the hold capacity, and has poor ship energy efficiency. Therefore, what kind of arrangement structure can be adopted can be without the ballast tank double-shell, and the technical problem to be solved by the technical personnel in the field is to improve the stability and safety and simultaneously improve the utilization rate of the tank capacity.

Disclosure of Invention

In order to solve the technical problems, the invention provides a ballast tank structure with a communication pipeline, which is a more efficient and safer ballast tank structure of a liquefied gas carrier, and aims to solve the technical problem of insufficient utilization rate of tank capacity in the existing ballast tank design.

The technical scheme of the invention is as follows: a ballast tank structure with communicating piping, a top ballast tank disposed between a main deck and a hull shell adjacent to a cargo hold; a bottom ballast tank disposed between the hull shell and the bottom of the vessel adjacent the cargo hold; the top ballast water tank and the bottom ballast water tank are symmetrically arranged at the two sides of the ship; the top water ballast tank and the bottom water ballast tank on the same side are hermetically connected through a first communication pipeline, suction ports are uniformly distributed in the bottom water ballast tanks and the cargo hold on the two sides, and pressure control valves are arranged in the cargo hold; the pressure control valve and the suction port are hermetically connected through a second communication pipeline.

Based on the technical characteristics: and the second communication pipeline penetrates through the position of the inner bottom between the bottom ballast water tank and the cargo hold, the second communication pipeline positioned in the cargo hold is welded with the outer sleeve, the second communication pipeline positioned in the bottom ballast water tank is welded with the inner sleeve, the inner sleeve is inserted into the outer sleeve and is welded and fixed, and the outer sleeve and the inner bottom are drilled and fixed through the compound plate.

Based on the technical characteristics: the liquid tank is arranged between the top ballast water tank and the bottom ballast water tank, and the distance between the top ballast water tank and the liquid tank is 800 mm to 1000 mm; the bottom ballast tank is spaced 800 mm to 1000 mm from the tank.

Based on the technical characteristics: when the cargo hold is damaged and water enters and the water inflow exceeds 20% -35% of the cargo hold capacity, the pressure control valve is automatically opened.

Based on the technical characteristics: the pressure control valve is provided with an opening alarm.

In the invention, the pressure control valve belongs to a normally closed state in a normal navigation state, and can be provided with an opening alarm. When the pressure control valve is opened, the ship cab gives out sound and flash alarm. The cab can close the opened pressure control valve again through a remote control button. When the cargo hold is damaged and water enters and the water inflow exceeds 20% -35% of the capacity of the cargo hold, the pressure control valve is automatically opened, and the top ballast water tank, the bottom ballast water tank and the cargo hold are communicated with each other through the first communication pipeline and the second communication pipeline.

Among the above-mentioned technical scheme, pressure control valve, suction inlet can arrange in the preceding, well, the back any position of cargo hold, and the number of the terminal suction inlet of second intercommunication pipeline can be one, also can be a plurality of.

The ballast tank structure has the following beneficial effects:

when the ship cargo hold is damaged, the water inflow of the cargo hold can flow in the cargo hold and the ballast tank through the pressure control valve, the first communicating pipeline and the second communicating pipeline, and the ship transverse inclination angle is reduced.

This ballast tank structure need not set up ballast tank bivalve, when improving the remaining ability of broken cabin stability of boats and ships, has guaranteed the hold utilization ratio.

The design of the ballast tank structure reduces the steel consumption of the ship ballast tank and reduces the shipbuilding cost.

The design of the ballast tank structure reduces the main scale requirement of ships accommodated in the same tank, improves the energy efficiency of the ships, reduces the fuel consumption of the ships and reduces the operation cost of shipowners.

Drawings

FIG. 1 is a schematic illustration of a ballast tank configuration with communication lines according to the present invention;

FIG. 2 is a schematic view of a second communication line of the ballast tank configuration with communication lines of the present invention;

fig. 3 is a partial enlarged view of a portion a in fig. 1.

The reference numbers in the figures denote: the ship comprises a main deck 1, a hull shell 2, a ship bottom 3, a top ballast water tank 11, a bottom ballast water tank 12, a cargo hold 13, a liquid tank 14, an inner bottom 31, a first communication pipeline 21, a second communication pipeline 21', a pressure control valve 22, a suction port 23, an outer sleeve 41, an inner sleeve 42 and a double plate 32.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1 and 2: a ballast tank structure with a communication pipeline comprises a top ballast water tank 11, a bottom ballast water tank 12, a first communication pipeline 21, a second communication pipeline 21', a pressure control valve 22 and a suction port 23.

A top ballast tank 11 is arranged between the main deck 1 and the hull shell 2, adjacent to the cargo hold 13; a bottom ballast tank 12 is disposed between the hull shell 2 and the bottom 3 adjacent to the cargo hold 13; the top ballast water tank 11 and the bottom ballast water tank 12 are symmetrically arranged at the two sides of the ship; the top ballast water tank 11 and the bottom ballast water tank 12 on the same side are hermetically connected through a first communication pipeline 21, suction ports 23 are respectively arranged in the bottom ballast water tank 12 and the cargo hold 13 on the two sides, pressure control valves 22 are arranged in the cargo hold 13, and the number of the pressure control valves 22 is not limited; the pressure control valve 22 and the suction port 23 are hermetically connected to each other through a second communication line 21'. The top ballast tank 11 is spaced from the tank 14 by 800 mm to 1000 mm; bottom ballast tank 12 is spaced 800 mm to 1000 mm from tank 14.

As shown in fig. 3, the second communication pipeline 21 ' passes through the position of the inner bottom 31 between the bottom ballast water tank 12 and the cargo tank 13, the second communication pipeline 21 ' in the cargo tank 13 is welded with the outer sleeve 41, the second communication pipeline 21 ' in the bottom ballast water tank 12 is welded with the inner sleeve 42, the inner sleeve 42 is inserted into the outer sleeve 41 and welded and fixed, and the outer sleeve 41 and the inner bottom 31 are welded and fixed through the doubling plate 32. The airtight connection is only an example, and other airtight connection methods may be used to ensure the water tightness between the bottom ballast water tank 12 and the cargo tank 13.

The pressure control valve 22 is in a normally closed state in a normal sailing state, and can be provided with an opening alarm. When the pressure control valve 22 is opened, the ship cab will sound and flash to give an alarm. The cab can close the opened pressure control valve 22 again by a remote control button. The opening alarm device of the pressure control valve belongs to the prior art, and the pressure control valve 22 has the function. When the cargo tank 13 is damaged and water enters and the water inflow exceeds 20% -35% of the cargo tank capacity or other set proportion, the pressure control valve 22 is automatically opened, and the top ballast water tank 11, the bottom ballast water tank 12 and the cargo tank 13 are communicated with each other through the first communication pipeline 21 and the second communication pipeline 21'.

By adopting the ballast tank structure, the inclination angle of the ship when the ship is damaged can be reduced, and the safety of the ship is improved. The stability of ship cabin breaking is improved, the steel consumption is reduced, the cost is reduced, and the energy efficiency level of the ship is also improved.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A ballast tank structure with communicating pipeline, its characterized in that: a top ballast tank (11) arranged between the main deck (1) and the hull shell (2), adjacent to the cargo hold (13); a bottom ballast tank (12) arranged between the hull shell (2) and the bottom (3) of the vessel, adjacent to the cargo hold (13); the top ballast water tank (11) and the bottom ballast water tank (12) are symmetrically arranged at the two sides of the ship; the top ballast water tank (11) and the bottom ballast water tank (12) on the same side are hermetically connected through a first communication pipeline (21), suction ports (23) are uniformly arranged in the bottom ballast water tank (12) and the cargo hold (13) on two sides, and a pressure control valve (22) is arranged in the cargo hold (13); the pressure control valve (22) and the suction port (23) are hermetically connected through a second communication pipeline (21').

2. The ballast tank structure with communication piping according to claim 1, wherein: at the position that the second communication pipeline (21 ') penetrates through an inner bottom (31) between the bottom ballast water tank (12) and the cargo tank (13), the second communication pipeline (21 ') in the cargo tank (13) is connected with an outer sleeve (41) in a welding mode, the second communication pipeline (21 ') in the bottom ballast water tank (12) is connected with an inner sleeve (42) in a welding mode, the inner sleeve (42) is inserted into the outer sleeve (41) and fixed in a welding mode, and the outer sleeve (41) and the inner bottom (31) are fixedly welded through a doubling plate (32).

3. The ballast tank structure with communication piping according to claim 1, wherein: a tank (14) disposed intermediate said top ballast tank (11) and said bottom ballast tank (12), said top ballast tank (11) being spaced from said tank (14) by a distance of 800 mm to 1000 mm; the bottom ballast tank (12) is spaced from the tank (14) by a distance of 800 mm to 1000 mm.

4. The ballast tank structure with communication piping according to claim 1, wherein: when the cargo hold (13) is damaged and water enters and the water inflow exceeds 20% -35% of the capacity of the cargo hold (13), the pressure control valve (22) is automatically opened.

5. The ballast tank structure with communication piping according to claim 1, wherein: the pressure control valve (22) is provided with an opening alarm.