Oil receiving tank overflow system for marine navigation fuel oil supply of surface ship

Abstract

The invention discloses an oil receiving cabin overflow system for surface ship marine navigation fuel oil supply, which comprises an oil receiving cabin and an oil overflow cabin, the oil overflow cabin is an oil storage cabin which is positioned on the same layer as the oil receiving cabin, has the same watertight section and is adjacent to the oil receiving cabin, a supply oil receiving pipe is arranged on the oil receiving cabin, and the oil receiving cabin is communicated with the oil overflow cabin through a short overflow pipe; the system further comprises an alarm assembly which is arranged on the oil receiving cabin and the oil overflowing cabin so as to give an alarm for oil receiving and overflowing operation. The end, located in the oil receiving cabin, of the short overflow pipe extends downwards from an inner cavity in the top of the oil receiving cabin, the extending end is bent towards the overflow cavity and extends into the oil spilling cabin, the end, extending into the oil spilling cabin, of the short overflow pipe is bent upwards and extends to be close to the inner wall of the top of the oil spilling cabin, and the whole short overflow pipe is in a U shape. Overall arrangement is facilitated, the length of the short overflow pipe is greatly shortened on the premise that the specified sectional area is met, shipyard lofting construction is facilitated, and meanwhile the weight of a system pipeline is reduced to a certain degree; and under the same overflow height, the actual available loading capacity of the oil receiving tank is larger.

Description

Technical Field

[0001] The invention relates to an oil receiving tank overflow system for fuel replenishment of a surface ship sailing at sea, belonging to the technical field of ship design. Background Art

[0002] When receiving fuel supply during sea voyage, surface ships should be equipped with corresponding receiving tanks, overflow tanks and oil storage tanks according to relevant specifications. Among them, the receiving tank should be equipped with an overflow pipe so that the overflowed oil in the receiving and supplying process can overflow to the overflow tank. The cross-sectional area of ​​the overflow pipe should not be less than 1.25 times the cross-sectional area of ​​the injection pipe; the overflow tank should usually be one deck lower than the receiving tank, and its capacity should be able to accommodate at least 3 to 5 minutes of fuel supply; the overflow pipe should be equipped with an overflow alarm device or overflow observer; and the overflow pipe shall not be equipped with cut-off accessories.

[0003] Reference Figure 1 In the past, when designing the fuel oil navigation supply receiving system for ships, one or more deep fuel tanks were usually selected as the receiving tanks, and overflow holes were opened on the side walls of the receiving tanks and overflow pipes were installed; the overflow tanks were set in the double bottom of the engine room away from the receiving tanks; the overflow pipes of the receiving tanks were connected to the overflow tanks in the double bottom area of ​​the engine room area. However, as the main scale of surface ships continues to increase and the amount of navigation supply continues to increase, the above design faces the following problems: First, the receiving tank is far away from the double bottom overflow tank in the engine room area, and the overflow pipe has a thicker diameter, a longer length, and a heavier weight, which occupies more overall resources and is not convenient for shipyard construction and layout; second, in order to meet the requirements of receiving 3 to 5 minutes of fuel supply, the volume of the overflow tank becomes larger and larger as the supply volume increases; third, the type of opening overflow holes on the side walls and installing overflow pipes will also cause the actual maximum loading capacity of the receiving tank to be slightly lower than the nominal maximum loading capacity (such as Figure 2 ). Therefore, there is an urgent need in the art for a new type of oil receiving tank overflow system for fuel replenishment during navigation of surface ships. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an oil tank overflow system for surface ships to replenish fuel during maritime navigation. Oil is overflowed from the oil tank during navigation replenishment to adjacent oil tanks, which is convenient for layout and construction. There is no need to set up a large-volume overflow tank separately, and the actual available loading capacity of the oil tank is larger.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] The present invention provides an oil receiving tank overflow system for fuel replenishment of surface ships at sea, comprising an oil receiving tank and an oil overflow tank, wherein the oil overflow tank is arranged adjacent to the oil receiving tank on the same floor, a supply oil receiving pipe is arranged on the oil receiving tank, and the oil receiving tank and the oil overflow tank are connected through a short overflow pipe;

[0007] It further includes an alarm component, which is arranged on the oil receiving tank and the oil spill tank to alarm for oil receiving and overflow operations.

[0008] Preferably, the oil spill tank is an oil storage tank located on the same layer, in the same watertight section and adjacent to the oil receiving tank.

[0009] Preferably, one end of the short overflow pipe located in the oil receiving tank extends downward from the inner cavity at the top of the oil receiving tank, and the extended end bends towards the overflow cavity and extends into the oil spill tank. One end of the short overflow pipe extending into the oil spill tank bends upward and extends close to the inner wall at the top of the oil spill tank. The short overflow pipe is integrally in a "U" shape.

[0010] Furthermore, the opening end of the short overflow pipe located in the oil receiving tank is arranged in a flared shape.

[0011] Furthermore, the alarm component includes an oil receiving tank high-level alarm, an oil receiving tank ultra-high-level alarm and an oil spill tank high-level alarm. The oil receiving tank high-level alarm and the oil receiving tank ultra-high-level alarm are arranged at intervals up and down on the outer wall of the oil receiving tank, and the oil receiving tank ultra-high-level alarm is located below the opening end of the short overflow pipe in the oil receiving tank; the oil spill tank high-level alarm is arranged on the outer wall of the oil spill tank and is located below the opening end of the short overflow pipe in the oil spill tank.

[0012] Even further, the alarm component further includes an overflow alarm component, which includes a drainage pipe and an overflow alarm. One end of the drainage pipe is connected from the outer wall of the bent part of the short overflow pipe located in the oil receiving tank, and the other end is connected to the outer wall of the bent part of the short overflow pipe extending into the oil spill tank. The flow area of the drainage pipe is much smaller than the flow area of the short overflow pipe, and the overflow alarm is arranged on the drainage pipe.

[0013] Even further, two isolation valves are arranged on the drainage pipe, and the two isolation valves are respectively arranged in contact with the outer walls of the oil receiving tank and the oil spill tank.

[0014] Even further, a drain valve is arranged on the drainage pipe.

[0015] Preferably, the flow area of the short overflow pipe is not less than 1.25 times the flow area of the refueling supply oil pipe.

[0016] Preferably, an oil receiving tank breather pipe is arranged on the top wall of the oil receiving tank, and the oil receiving tank breather pipe is connected to a first breather head. An oil spill tank breather pipe is arranged on the top wall of the oil spill tank, and the oil spill tank breather pipe is connected to a second breather head.

[0017] The oil receiving tank overflow system for fuel supply during the sea voyage of a surface ship provided by the present invention has the following advantages:

[0018] The oil receiving tank overflow system for refueling of surface ships at sea, the oil overflow tank can be arranged on the same deck as the oil receiving tank, and the positions are adjacent, so there is no need to set up a large-volume oil overflow tank on a deck layer far away from the oil receiving tank and lower, which is convenient for the overall layout; the overflow pipe has a greatly shortened length while meeting the prescribed cross-sectional area, which is convenient for the shipyard's layout construction and reduces the weight of the system pipeline to a certain extent; under the same overflow height, the actual available loading capacity of the oil receiving tank is larger. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overflow system of the fuel supply receiving tank of a conventional surface ship sailing at sea;

[0020] Figure 2 This is a schematic diagram of the loading capacity of the receiving tank of a conventional overflow system;

[0021] Figure 3 A schematic diagram of the structure of an oil receiving tank overflow system for fuel replenishment for surface ships sailing at sea provided by the present invention;

[0022] Figure 4 This is a structural diagram mainly showing the positional relationship between the alarm component and the oil receiving tank and the oil spill tank of the present invention;

[0023] Figure 5 A schematic diagram of the loading capacity of an oil receiving tank of an oil receiving tank overflow system for fuel supply for surface ships sailing at sea provided by the present invention;

[0024] In the figure:

[0025] 1-receiving tank; 11-supply receiving pipe; 2-oil overflow tank; 3-short overflow pipe; 4-tank access parts; 5-alarm assembly; 51-receiving tank high liquid level alarm; 52-receiving tank high-high liquid level alarm; 53-oil overflow tank high liquid level alarm; 54-overflow alarm component; 541-drainage pipe; 542-overflow alarm; 6-isolation valve; 7-discharge valve; 8-receiving tank vent pipe; 81-first vent head; 9-oil overflow tank vent pipe; 92-second vent head. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0027] Reference Figure 3-Figure 5, this application provides an over - flow system for the fuel receiving tank during the sea - going fuel replenishment of a surface ship, which includes a fuel receiving tank 1 and an over - flow tank 2. The over - flow tank 2 is arranged adjacent to the fuel receiving tank 1 on the same layer. A replenishment fuel receiving pipe 11 is installed on the fuel receiving tank 1. The replenishment fuel receiving pipe 11 can be a pipe body of any shape. When the surface ship is receiving fuel replenishment during sea - going navigation, fuel is injected into the fuel receiving tank 1 through the replenishment fuel receiving pipe 11. The fuel receiving tank 1 and the over - flow tank 2 are connected through a short over - flow pipe 3. In this embodiment, the over - flow tank 2 is an oil storage tank that is on the same layer, in the same watertight section and adjacent to the fuel receiving tank 1, replacing the previous design where the fuel receiving tank 1 of the ship is far from the double - bottom over - flow tank 2. The replenishment fuel receiving pipe 11 is preferably a circular pipe with a nominal diameter of 150 mm.

[0028] One end of the short over - flow pipe 3 located in the fuel receiving tank 1 extends downward from the inner cavity at the top of the fuel receiving tank 1, and the extended end bends towards the over - flow cavity and extends into the over - flow tank 2. A through - bulkhead fitting 4 for the short over - flow pipe 3 to pass through is installed between the fuel receiving tank 1 and the over - flow tank 2. One end of the short over - flow pipe 3 extending into the over - flow tank 2 bends upward and extends close to the inner wall at the top of the over - flow tank 2, making the short over - flow pipe 3 as a whole in a "U" shape. That is, during the over - flow process, the fuel will first fill the sunken part below the short over - flow pipe 3, and then flow into the over - flow tank 2. The open end of the short over - flow pipe 3 located in the fuel receiving tank 1 is set in a flared shape to facilitate the flow of fuel. The flow area of the short over - flow pipe 3 is not less than 1.25 times the flow area of the replenishment fuel receiving pipe 11. In this embodiment, the short over - flow pipe 3 is preferably a circular pipe with a nominal diameter of 175 mm.

[0029] Refer to Figure 3 and Figure 4 , an over - flow system for the fuel receiving tank during the sea - going fuel replenishment of a surface ship further includes an alarm component 5. The alarm component 5 is installed on the fuel receiving tank 1 and the over - flow tank 2 to alarm for the fuel receiving and over - flow operations.

[0030] The alarm component 5 includes a high - level alarm 51 for the fuel receiving tank, a high - high - level alarm 52 for the fuel receiving tank and a high - level alarm 53 for the over - flow tank. The high - level alarm 51 for the fuel receiving tank and the high - high - level alarm 52 for the fuel receiving tank are installed on the outer wall of the fuel receiving tank 1 at an upper - lower interval. The high - high - level alarm 52 for the fuel receiving tank is located below the open end of the short over - flow pipe 3 in the fuel receiving tank 1. The high - level alarm 53 for the over - flow tank is installed on the outer wall of the over - flow tank 2 and is located below the open end of the short over - flow pipe 3 in the over - flow tank 2.

[0031] As the liquid level in the fuel receiving tank 1 continuously rises, the high - level alarm for the fuel receiving tank 1 and the high - high - level alarm for the fuel receiving tank 1 are successively activated to give an alarm, reminding the ship crew to stop the receiving work of the fuel receiving tank 1. When the liquid level in the fuel receiving tank 1 continues to rise, the fuel will enter the flared opening of the short over - flow pipe 3 and overflow into the over - flow tank 2. When the liquid level in the over - flow tank 2 rises to the set height, the high - level alarm 53 for the over - flow tank is activated to give an alarm. In this implementation, the use and principle of the liquid - level alarm are both prior arts and will not be elaborated too much.

[0032] Reference Figure 3 and Figure 4 The alarm assembly 5 also includes an overflow alarm component 54, which includes a drainage pipe 541 and an overflow alarm 542. One end of the drainage pipe 541 is connected to the outer wall of the bent portion of the short overflow pipe 3 located in the oil receiving tank 1, and the other end is connected to the outer wall of the bent portion of the short overflow pipe 3 extending into the oil overflow tank 2. The drainage pipe 541 is used to play the overflow signal guidance function and does not bear the overflow function. The flow area of ​​the drainage pipe 541 is much smaller than the flow area of ​​the short overflow pipe 3. The overflow alarm 542 is installed on the drainage pipe 541. When fuel overflow occurs, the drainage pipe 541 will also be filled with fuel. Therefore, the overflow alarm 542 will correspondingly issue an on-site alarm and a remote alarm signal. In this embodiment, the diameters of the drainage pipe 541 and the overflow alarm 542 are preferably 25 mm.

[0033] Furthermore, from the perspective of safety and practicality, two isolation valves 6 are installed on the drainage pipe 541. The two isolation valves 6 are respectively installed on the outer walls of the oil receiving tank 1 and the oil spill tank 2. The isolation valves 6 are normally closed and opened before fuel replenishment. In this embodiment, the isolation valves 6 use conventional stop-type valve components, which are existing technologies and will not be described in detail.

[0034] Furthermore, a discharge valve 7 is installed on the drainage pipe 541. The discharge valve 7 is in a normally closed state. When the fuel supply receiving task is completed, it is opened to empty the residual oil in the overflow pipe and the drainage pipe 541. In this embodiment, the diameter of the discharge valve 7 is preferably 15 mm.

[0035] Since the shape of the short overflow pipe 3 is specially designed, during the overflow process, the fuel will first fill the concave part below it, and since the isolation valve 6 on the drainage pipe 541 is in an open state during fuel replenishment, fuel will also flow into the drainage pipe 541 connected to the short overflow pipe 3, thereby causing the overflow alarm 542 to operate and sound an alarm. After the fuel receiving and replenishment task is completed, the discharge valve 7 is opened to empty the residual oil in the short overflow pipe 3 and the drainage pipe 541. According to the actual ship situation, the residual oil can be discharged locally to the oil collection container, or discharged to the double bottom oil tank through the pipe.

[0036] Reference Figure 3 An oil receiving tank vent pipe 8 is installed on the top wall of the oil receiving tank 1, and the oil receiving tank vent pipe 8 is connected to a first vent head 81. An oil spill tank vent pipe 9 is installed on the top wall of the oil spill tank 2, and the oil spill tank vent pipe 9 is connected to a second vent head 92. During the fuel receiving and replenishment process, the oil receiving tank 1 is ventilated to the open deck through the oil receiving tank vent pipe 8 and the first vent head 81, and the oil spill tank 2 is ventilated to the open deck through the oil spill tank vent pipe 9 and the second vent head 92.

[0037] The above is only a preferred embodiment of the present invention, and is not any formal or substantial limitation of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be regarded as the protection scope of the present invention. Any technician familiar with this profession, without departing from the spirit and scope of the present invention, can make some changes, modifications and equivalent changes made by using the technical content disclosed above, which are equivalent embodiments of the present invention; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An oil tank overflow system for fuel supply for surface ships sailing at sea, characterized in that: It includes an oil receiving tank (1) and an oil spill tank (2). The oil spill tank (2) is arranged adjacent to the oil receiving tank (1) on the same layer. A supply and receiving oil pipe (11) is provided on the oil receiving tank (1). The oil receiving tank (1) and the oil spill tank (2) are communicated through a short overflow pipe (3). It further includes an alarm assembly (5). The alarm assembly (5) is arranged on the oil receiving tank (1) and the oil spill tank (2) to alarm for oil receiving and overflow operations.

2. The oil tank overflow system for fuel supply for surface ships at sea as claimed in claim 1, characterized in that: The oil spill tank (2) is an oil storage tank that is on the same layer, in the same watertight section and adjacent to the oil receiving tank (1).

3. The oil tank overflow system for fuel supply for surface ships at sea as claimed in claim 1, characterized in that: One end of the short overflow pipe (3) located in the oil receiving tank (1) extends downward from the inner cavity at the top of the oil receiving tank (1). The extended end bends towards the overflow cavity and extends into the oil spill tank (2). One end of the short overflow pipe (3) extending into the oil spill tank (2) bends upward and extends close to the inner wall at the top of the oil spill tank (2). The short overflow pipe (3) is integrally in a "U" shape.

4. The oil tank overflow system for fuel supply for surface ships at sea as claimed in claim 3, characterized in that: The open end of the short overflow pipe (3) located in the oil receiving tank (1) is arranged in a flared shape.

5. The oil tank overflow system for fuel supply for surface ships at sea as claimed in claim 3, characterized in that: The alarm assembly (5) includes an oil receiving tank high liquid level alarm (51), an oil receiving tank very high liquid level alarm (52) and an oil spill tank high liquid level alarm (53). The oil receiving tank high liquid level alarm (51) and the oil receiving tank very high liquid level alarm (52) are arranged at intervals up and down on the outer wall of the oil receiving tank (1). The oil receiving tank very high liquid level alarm (52) is located below the open end of the short overflow pipe (3) in the oil receiving tank (1). The oil spill tank high liquid level alarm (53) is arranged on the outer wall of the oil spill tank (2) and is located below the open end of the short overflow pipe (3) in the oil spill tank (2).

6. The oil tank overflow system for fuel supply for surface ships at sea as claimed in claim 5, characterized in that: The alarm assembly (5) further includes an overflow alarm component (54). The overflow alarm component (54) includes a drainage pipe (541) and an overflow alarm (542). One end of the drainage pipe (541) is connected from the outer wall of the bent part of the short overflow pipe (3) located in the oil receiving tank (1), and the other end is connected to the outer wall of the bent part of the short overflow pipe (3) extending into the oil spill tank (2). The flow area of the drainage pipe (541) is much smaller than the flow area of the short overflow pipe (3). The overflow alarm (542) is arranged on the drainage pipe (541).

7. The oil tank overflow system for fuel supply for surface ships at sea as claimed in claim 6, characterized in that: Two isolation valves (6) are arranged on the drainage pipe (541). The two isolation valves (6) are respectively arranged in contact with the outer walls of the oil receiving tank (1) and the oil spill tank (2).

8. The oil tank overflow system for fuel supply for surface ships at sea as claimed in claim 6, characterized in that: A drain valve (7) is arranged on the drainage pipe (541).

9. The oil tank overflow system for fuel supply for surface ships at sea as claimed in claim 1, characterized in that: The flow area of the short overflow pipe (3) is not less than 1.25 times the flow area of the supply and receiving oil pipe (11).

10. The oil tank overflow system for fuel supply for surface ships at sea as claimed in claim 1, characterized in that: An oil receiving tank breather pipe (8) is arranged on the top wall of the oil receiving tank (1). The oil receiving tank breather pipe (8) is communicated with a first breather head (81). An oil spill tank breather pipe (9) is arranged on the top wall of the oil spill tank (2). The oil spill tank breather pipe (9) is communicated with a second breather head (92).

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