An independent ballast tank with a ballast pump room

Abstract

An independent ballast tank with a ballast pump room, the port and right hulls of the hull are provided with cargo oil tank areas, the cargo oil tank areas have multiple ballast tanks, each ballast tank is composed of two side ballast tanks and two bottom ballast tanks to form a "concave"-shaped structure, a ballast pump room is provided at the center of the side ballast tank located at the main deck, the ballast pump room runs through the side ballast tank and the bottom ballast tank from top to bottom, the ballast pump room extends from the main deck to the outer bottom plate, a ballast pump is provided in the ballast pump room, the pump head of the ballast pump is provided at the bottom of the ballast pump room, the pump head is connected to a pump pipe, the pump pipe is fixed in the ballast pump room through a bracket, a ballast pump cover and a manhole cover are provided on the top of the ballast pump room, and the ballast pump cover is connected to the pump pipe. The present invention realizes the installation of the deep well ballast pump and ensures the normal use of the ballast system function by arranging a small-volume deep well ballast pump room and a ballast system at the ballast tank position in the cargo hold area of ​​the floating oil storage vessel.

Description

Technical Field

[0001] The invention relates to the field of ship construction and ship design, and in particular to a ballast tank with a ballast pump cabin on a floating oil storage vessel. Background Art

[0002] In recent years, there have been frequent crude oil spills at sea, causing catastrophic damage to the marine and coastal ecosystems. With the continuous occurrence of marine pollution incidents, the global anti-oil spill measures for various types of ships and marine engineering equipment have become increasingly stringent.

[0003] Floating oil storage vessels include floating production storage and offloading vessels (FPSO), floating storage and offloading vessels (FSO), floating crude oil production units (FPU) and floating storage units (FSU). Since such ships carry a large amount of crude oil, the International Maritime Organization and coastal countries have increasingly high safety requirements for them. Generally speaking, a self-propelled floating oil storage vessel only needs to be equipped with an L-type ballast tank 1 in the cargo tank area (see Figure 1 ) is used to isolate and protect the cargo oil tanks. In recent years, some coastal countries have required self-propelled floating storage vessels to be equipped with independent side ballast tanks and bottom ballast tanks in the cargo oil tank area for higher safety considerations.

[0004] For this type of floating oil storage vessel with independent side and bottom ballast tanks, it will face great difficulties if the conventional deep well ballast pump is used for ballast and discharge operations. The deep well ballast pump is a general water-lifting machine with a motor and a water pump directly connected and immersed in water. In order to ensure its water absorption capacity and positive pressure at the suction port, the deep well ballast pump is generally arranged at the bottom of the ballast tank. There are two problems: (1) If the deep well pump is arranged at the bottom of the side ballast tank, due to the height difference, the deep well pump's ability to absorb ballast water in the bottom ballast tank is weakened. When the floating oil storage vessel has a large draft difference between the bow and the stern, the bottom ballast tank will not be able to absorb ballast water. (2) If the deep well pump is arranged at the bottom ballast tank, since the pump pipe structure of the deep well pump cannot be welded, it is impossible to complete the watertight connection. Under the premise of ensuring the independent watertightness of the side ballast tank and the bottom ballast tank, the deep well ballast pump cannot be installed.

[0005] In view of the above situation, it is necessary to design a deep well ballast pump installation form and ballast system suitable for the independent side ballast tanks and bottom ballast tanks of floating oil storage vessels. Summary of the invention

[0006] In order to solve the above problems, the present invention provides an independent ballast tank with a ballast pump room, aiming to achieve the purpose of safety of all parts of the ballast tank, and the technical solution adopted is:

[0007] An independent ballast tank with a ballast pump room, characterized in that: the port and right hulls of the hull are provided with cargo oil tank areas, the cargo oil tank areas have multiple ballast tanks, each of the ballast tanks is composed of two side ballast tanks and two bottom ballast tanks to form a "concave"-shaped structure; the center of the side ballast tank located at the main deck is provided with a ballast pump room, the ballast pump room runs through the side ballast tank and the bottom ballast tank from top to bottom, and the ballast pump room extends from the main deck to the outer bottom plate; a ballast pump is provided in the ballast pump room, the pump head of the ballast pump is provided at the bottom of the ballast pump room, the pump head is connected to a pump pipe, the pump pipe is fixed in the ballast pump room through a bracket, a ballast pump cover and a manhole cover are provided on the top of the ballast pump room, and the ballast pump cover is connected to the pump pipe. The ballast pump room divides the side ballast tank into two independent sub-side ballast tanks and two independent sub-bottom ballast tanks.

[0008] The two side ballast tanks and the two bottom ballast tanks are independent. The two bottom ballast tanks are connected end to end to form a "I" shape. The two side ballast tanks are respectively arranged on both sides of the bottom ballast tank. The side ballast tanks and the bottom ballast tanks form a "concave" structure. The bottom ballast tanks and side ballast tanks are independent of each other. When an external ship hits the side ballast tank or the bottom ballast tank, the damage and water inflow of the bottom ballast tank will not affect the side ballast tank, and the side ballast tank will not be flooded; when the side ballast tank is damaged or flooded, it will not affect the bottom ballast tank, and the bottom ballast tank will not be flooded, which improves the safety of the oil storage ship.

[0009] A ballast pump room is set in the center of the side ballast tank located on the main deck. The ballast pump room runs through the side ballast tank and the bottom ballast tank from top to bottom, that is, the ballast pump room extends from the main deck to the outer bottom plate. The ballast pump room separates the side ballast tank and the bottom ballast tank into multiple independent ballast tanks. Each side ballast tank and each bottom ballast tank are independent of each other and do not interfere with each other. If any side ballast tank or bottom ballast tank is damaged or flooded, it will not affect other side ballast tanks or bottom ballast tanks, ensuring the safety of the oil storage ship.

[0010] The above-mentioned independent ballast tank with a ballast pump room, further, the ballast pump room is provided with an independent remote control valve and ballast water suction and discharge port. The ballast pump room has independent suction and discharge ports, both of which are connected to the suction and discharge main pipe, the suction and discharge main pipe is annular, and the independent remote control valve and ballast water suction and discharge port facilitate the ballast pump room to perform independent water filling or drainage operations.

[0011] In the above-mentioned independent ballast tank with a ballast pump room, further, the side ballast tank and the bottom ballast tank adjacent to the ballast pump room are both provided with independent remote control valves and ballast water suction and discharge ports. The independent remote control valves and ballast water suction and discharge ports facilitate independent water filling or drainage operations of the side ballast tank and the bottom ballast tank. The side ballast tank and the bottom ballast tank are provided with independent suction ports and discharge ports, which are connected to the suction and discharge main pipe, and the suction and discharge main pipe is annular.

[0012] In the above-mentioned independent ballast tank with ballast pump room, further, the pipeline in the ballast pump room passes through the tank through a watertight penetration piece. The pipeline is watertightly arranged to ensure that the structures of various parts in the ballast tank are completely sealed.

[0013] The above-mentioned independent ballast tank with ballast pump room, further, a vertical ladder is arranged in the ballast pump room and below the manhole cover. The vertical ladder facilitates workers to enter the ballast pump room to inspect and repair the components in the room.

[0014] The above-mentioned independent ballast tank with a ballast pump room, further, the cargo oil tank area has 5 or 6 ballast tanks.

[0015] The above-mentioned independent ballast tank with a ballast pump cabin, further, has a cargo oil tank arranged in the groove formed by the side ballast tank and the bottom ballast tank.

[0016] For multiple ballast tanks in the cargo oil tank area, a ballast pump room only needs to be set up in one ballast tank, and the ballast pump room must be set up in the ballast tank located on the main deck.

[0017] The present invention arranges a small-volume deep-well ballast pump cabin and a ballast system at the ballast tank position in the cargo hold area of ​​the floating oil storage vessel, thereby solving the problem of installing a deep-well ballast pump and ensuring the normal use of the ballast system function for a floating oil storage vessel with independent side and bottom ballast tanks without changing the ballast tank type and the type, number and capacity of the deep-well ballast pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the existing ballast tank structure;

[0019] Figure 2 It is a schematic diagram of the ballast tank structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the internal structure of the ballast pump cabin of the present invention;

[0021] Figure 4 is a top view of the ballast pump cabin of the present invention;

[0022] Figure 5 1. It is a schematic diagram of the top view of the cargo oil tank area of ​​the present invention;

[0023] Figure 6 1 is a schematic diagram of the cargo oil tank area viewed from above;

[0024] Among them: 1-ballast tank, 2-side ballast tank, 3-bottom ballast tank, 4-ballast pump room, 5-pump head, 6-pump pipe, 7-straight ladder, 8-pump cover, 9-manhole cover, 10-bracket, 11-cargo oil tank. DETAILED DESCRIPTION

[0025] The present invention will be further described with reference to the accompanying drawings. Figure 5 , 6 An independent ballast tank with a ballast pump room is shown in FIG. 5 ballast tanks 1 are respectively arranged in the cargo oil tank area on the left and right sides of the ship, as shown in FIG. Figure 2 As shown, each ballast tank has an independent side ballast tank 2 and a bottom ballast tank 3. The two bottom ballast tanks are connected end to end to form an "I" shape. Side ballast tanks are arranged on both sides of the bottom ballast tank. The bottom ballast tank and the side ballast tank form a groove, and a cargo oil tank 11 is arranged in the groove. At the center of the side ballast tank of the third ballast tank located on the main deck, a ballast pump room 4 is arranged from top to bottom through the side ballast tank and the bottom ballast tank. Figure 3 , 4 As shown, a ballast pump is provided in the ballast pump cabin. The ballast pump has a pump head 5 and a pump pipe 6. The pump head is provided at the bottom of the ballast pump cabin. The pump pipe is supported and fixed in the ballast pump cabin by a bracket 10. A manhole cover 9 and a ballast pump cover 8 are provided on the top of the side ballast tank. The ballast pump cover is connected to the pump pipe. A vertical ladder 7 is provided in the ballast pump cabin below the manhole cover to facilitate personnel to enter the ballast pump cabin for maintenance. The ballast pump cabin, the side ballast tanks adjacent to the ballast pump cabin, and the bottom ballast tanks are all provided with independent remote control valves and ballast water suction and discharge ports. The pipelines in the ballast pump cabin pass through the cabin through watertight penetration parts.

[0026] The present invention arranges a small-volume deep-well ballast pump cabin and a ballast system at the ballast tank position in the cargo hold area of ​​the floating oil storage vessel, thereby solving the problem of installing a deep-well ballast pump and ensuring the normal use of the ballast system function for a floating oil storage vessel with independent side and bottom ballast tanks without changing the ballast tank type and the type, number and capacity of the deep-well ballast pump.

Claims

1. An independent ballast tank with a ballast pump room, characterized in that: The port and starboard sides of the hull are provided with cargo oil tank areas, the cargo oil tank areas have a plurality of ballast tanks (1), each of the ballast tanks is composed of two side ballast tanks (2) and two bottom ballast tanks (3) forming a "concave"-shaped structure, a ballast pump cabin (4) is provided at the center of the side ballast tank located at the main deck, the ballast pump cabin runs through the side ballast tanks and the bottom ballast tanks from top to bottom, the ballast pump cabin extends from the main deck to the outer bottom plate, a ballast pump is provided in the ballast pump cabin, a pump head (5) of the ballast pump is provided at the bottom of the ballast pump cabin, the pump head is connected to a pump pipe (6), the pump pipe is fixed in the ballast pump cabin through a bracket (10), a ballast pump cover (8) and a manhole cover (9) are provided on the top of the ballast pump cabin, the ballast pump cover is connected to the pump pipe.

2. An independent ballast tank with a ballast pump room as claimed in claim 1, characterized in that: The ballast pump cabin is provided with an independent remote control valve and a ballast water suction and discharge port.

3. An independent ballast tank with a ballast pump room as claimed in claim 1, characterized in that: The side ballast tanks and the bottom ballast tanks adjacent to the ballast pump cabin are both provided with independent remote control valves and ballast water suction and discharge ports.

4. An independent ballast tank with a ballast pump room as claimed in claim 1, characterized in that: The pipelines in the ballast pump room pass through the room through watertight penetration parts.

5. An independent ballast tank with a ballast pump room as claimed in claim 1, characterized in that: A vertical ladder (7) is arranged in the ballast pump cabin and below the manhole cover.

6. An independent ballast tank with a ballast pump room as claimed in claim 1, characterized in that: The cargo tank area has 5 or 6 ballast tanks.

7. An independent ballast tank with a ballast pump room as claimed in claim 1, characterized in that: A cargo oil tank (11) is arranged in a groove formed by the side ballast tank and the bottom ballast tank.

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