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Liquid suction device

A suction device and liquid technology, applied in the direction of valve device, gas/liquid distribution and storage, ship hull, etc., can solve problems such as inability to operate continuously, and achieve the effect of high-efficiency unloading operations

Active Publication Date: 2013-10-09
MITSUBISHI SHIPBUILDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the suction port is exposed to the liquid surface, the pump will stop due to liquid interruption, so there is a problem that continuous operation cannot be performed.

Method used

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  • Liquid suction device
  • Liquid suction device
  • Liquid suction device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0071] As follows, while referring to figure 1 A liquid inhalation device according to a first embodiment of the present invention will be described.

[0072] figure 1 It is a cross-sectional view of a liquefied natural gas carrier (hereinafter referred to as "LNG ship") 1 in which the liquid suction device 10 of this embodiment is disposed in a membrane-type liquid tank 3 .

[0073] The LNG carrier 1 is a ship for transporting LNG, and a plurality of liquid tanks (in this embodiment, membrane type liquid tanks) 3 filled with LNG are provided in the hull 2 ​​.

[0074] A plurality of tanks 3 in the length direction of the hull 2 ​​(with figure 1 The vertical direction of the drawing) are arranged side by side. Each liquid tank 3 is a low-temperature heat-insulating container filled with cryogenic LNG inside, has a shape conforming to the space of a square tank, and has a bottom surface (flat surface) 4 having a predetermined area at the bottom.

[0075] A liquid suction de...

no. 2 example

[0084] while referring to figure 2 A liquid inhalation device according to a second embodiment of the present invention will be described.

[0085] figure 2 It is a cross-sectional view of an LNG carrier 29 in which the liquid suction device 30 of this embodiment is arranged in the membrane tank 3 .

[0086] The liquid suction device 30 of this embodiment is arranged on the center line L of the hull 2, and differs from the above-mentioned first embodiment in that a container 31 is provided instead of the bulkhead 11. Since other structural elements are the same as those of the first embodiment described above, descriptions of these structural elements are omitted here.

[0087] Components that are the same as those in the first embodiment described above are assigned the same symbols.

[0088] The liquid intake device 30 has a container 31 and a (cargo) pump 12 .

[0089] The container 31 prevents the suction part 21 of the pump 12 provided at the lowermost part of the p...

no. 3 example

[0094] while referring to image 3 A liquid suction device according to a third embodiment of the present invention will be described.

[0095] image 3 It is a cross-sectional view of an LNG carrier 39 in which the liquid suction device 40 of this embodiment is arranged in the membrane tank 3 .

[0096] The liquid inhalation device 40 of this embodiment differs from the second embodiment described above in that a container 41 is provided instead of the container 31 . Since other structural elements are the same as those of the above-mentioned embodiments, descriptions of these structural elements are omitted here.

[0097] Components that are the same as those in the above-mentioned embodiments are assigned the same symbols.

[0098] The liquid intake device 40 has a container 41 and a (cargo) pump 12 .

[0099] The container 41 prevents the suction part 21 of the pump 12 provided at the lowermost part of the pump 12 from being exposed to the liquid surface of the LNG by ...

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Abstract

The present invention prevents occurrence of lack of liquid even in rolling and / or pitching of a ship's hull or the like, and enables continuous running of a pump. A liquid suction device (10) for delivering liquid from the inside of a tank (3) storing the liquid as a cargo to the outside of the tank (3), the liquid suction device (10) provided with a pump (12) that is housed in an inner space (S1) formed by a partition wall (11) vertically arranged upward from a bottom surface (4) of the tank (3) and side walls forming the tank (3) or an inner space formed inside a container arranged on the bottom surface (4) of the tank (3) or in the vicinity of the bottom surface of the tank (3), suctions the liquid existing in the inner space (S1), and delivers the liquid to the outside of the tank (3) through a pipe (52) for cargo work, wherein the partition wall (11) or the container is provided with an opening (22) for circulating the liquid, and a check valve (23) for allowing a flow from the opening (22) into the inner space (S1) and regulating a flow from the opening (22) to the outside of the inner space (S1).

Description

technical field [0001] The present invention relates to the use of a suitable liquid suction device for a ship transporting liquids (especially an LNG ship transporting liquefied natural gas (hereinafter referred to as "LNG")). Background technique [0002] Generally, a ship transporting liquids has tanks for storing liquids as loads, and is also equipped with pumps and piping for loading and unloading. [0003] The open end of the piping for liquid loading and unloading arranged inside the liquid tank is generally provided near the bottom surface of the liquid tank in order to prevent air from being sucked in (for example, refer to Patent Document 1). [0004] Patent Document 1: JP-A-2006-123592 Contents of the invention [0005] Even in an LNG ship that transports LNG as cargo, pumps and pipes for loading and unloading LNG and the like are arranged near the tank bottom surface. [0006] However, in the case of an LNG ship, especially an LNG ship having a flat tank (a m...

Claims

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Application Information

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IPC IPC(8): B63B25/08F16K1/18F16K15/03
CPCF17C13/04B63B25/16B63B11/02B63B25/18F16K17/12F16K15/03F17C2203/00F17C2221/033F17C2223/0161F17C2223/033F17C2227/0142F17C2260/016F17C2270/0105F17C2227/0178F16K1/18B63B27/24B63B27/34
Inventor 上田伸
Owner MITSUBISHI SHIPBUILDING CO LTD
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