CN218662341U

CN218662341U - Be applied to ventilative structure of sharing in marine fuel tank

Info

Publication number: CN218662341U
Application number: CN202223360598.4U
Authority: CN
Inventors: 李恒伟; 曲庆亮; 于富强
Original assignee: Shanghai Zhenghua Heavy Industries Co Ltd
Current assignee: Shanghai Zhenghua Heavy Industries Co Ltd
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-03-21
Anticipated expiration: 2032-12-14

Abstract

The utility model discloses a shared ventilation structure applied to a marine fuel tank, which comprises a fuel tank injection main pipe, fuel tank injection branch pipes, an overflow and ventilation main pipe and overflow and ventilation branch pipes; the fuel tank injection branch pipes are provided with a plurality of pipes, one ends of the pipes are respectively connected into the corresponding fuel tanks, and the other ends of the pipes are communicated with the fuel tank injection main pipe; the overflow and ventilation branch pipes are provided with a plurality of branches, one ends of the branch pipes are respectively connected into the corresponding fuel oil cabin and the corresponding fuel oil overflow cabin, and the other ends of the branch pipes are communicated with the overflow and ventilation main pipe; the fuel overflow cabin and the overflow and ventilation main pipe are provided with ventilation pipes; a filling station isolating valve is arranged on the fuel tank filling main pipe; and a fuel cabin filling isolating valve is arranged on the fuel cabin filling branch pipe. The utility model discloses take the design of public permeability cell to reduce deck air head area occupied, reduce the risk of catching fire.

Description

Be applied to ventilative structure of sharing in marine fuel oil cabin

Technical Field

The utility model relates to a dispose the boats and ships in a plurality of fuel tanks, more specifically say, relate to a be applied to marine fuel tank's ventilative structure of sharing.

Background

The fuel tank is used for storing and supplying fuel for the power device on the ship. In order to meet the requirement that the ship stores corresponding fuel oil in a self-sustaining period, a plurality of fuel oil cabins are required to be configured. The conventional fuel system is that fuel stations are respectively arranged on two sides of a ship, fuel is respectively injected into each fuel tank, and an air pipe is independently arranged in each fuel tank; meanwhile, in order to prevent the fuel tanks from being injected with overpressure and prevent the fuel from overflowing through the ventilation head to cause danger, each fuel tank needs to be provided with an overflow pipe to the overflow tank.

The conventional design of a vent pipe and an overflow pipe for each fuel tank has the following problems:

1) Each fuel oil cabin is independently provided with a vent pipe, and a vent pipe end termination device, namely a vent pipe head, very occupies the area of a deck, so that the adverse effect on a ship with strict requirement on the clear area of the deck is greater, the maintenance work is complicated, and the workload of crew is increased;

2) Each fuel oil tank is provided with an air pipe and an overflow pipe respectively, the pipelines have various trends, the using amount of the pipes is increased, the difficulty of production design lofting is increased, and the weight of the ship is increased;

3) The number of air pipe heads of the fuel oil cabin is increased, so that the number of fire risk points in the area is increased, and the safety of the ship is not improved.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned defect that exists among the prior art, the utility model aims at providing a be applied to marine fuel tank's sharing ventilative structure, take the design of public permeability cell to reduce deck air head area occupied, reduce the risk of catching fire.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a common ventilation structure applied to a marine fuel tank comprises a fuel tank injection main pipe, fuel tank injection branch pipes, an overflow and ventilation main pipe and overflow and ventilation branch pipes;

the fuel tank injection branch pipes are provided with a plurality of pipes, one ends of the pipes are respectively connected into the corresponding fuel tanks, and the other ends of the pipes are communicated with the fuel tank injection main pipe;

the overflow and ventilation branch pipes are provided with a plurality of branch pipes, one end of each branch pipe is respectively connected into the corresponding fuel oil cabin and the corresponding fuel oil overflow cabin, and the other end of each branch pipe is communicated with the overflow and ventilation main pipe;

the fuel oil overflow cabin and the overflow and ventilation main pipe are provided with ventilation pipes;

a filling station isolating valve is arranged on the fuel tank filling main pipe;

and the fuel cabin filling branch pipe is provided with a fuel cabin filling isolating valve.

Preferably, a safety pressure relief pipe is further connected between the fuel tank injection main pipe and the fuel overflow tank;

and a safety valve is arranged on the safety pressure relief pipe.

Preferably, a ventilation pipe head is arranged on the ventilation pipe.

Preferably, an overflow alarm box is arranged on the overflow and ventilation branch pipe communicated with the fuel overflow cabin.

Preferably, the cross-sectional area of the pipeline of the overflow and ventilation main pipe is at least equal to the cross-sectional area of the pipeline of the two overflow and ventilation branch pipes.

Preferably, the pipe diameter of the fuel cabin injection main pipe is the same as that of the fuel cabin injection branch pipe.

The utility model provides a common ventilation structure applied to a marine fuel oil cabin, which effectively reduces the ventilation pipes of the independent fuel oil cabin and optimizes the pipeline arrangement; the occupied areas of the ventilating pipe head and the deck are reduced, the fire risk points in the area are reduced, and the safety of the ship is improved.

Drawings

Fig. 1 is a frame schematic diagram of the ventilation structure of the present invention.

Detailed Description

In order to better understand the technical solution of the present invention, the following further describes the technical solution of the present invention with reference to the accompanying drawings and embodiments.

With reference to fig. 1, the utility model provides a be applied to ventilative structure of sharing in marine fuel tank, including fuel tank injection house steward 1, fuel tank injection branch pipe 2, overflow and ventilative house steward 3 and overflow and ventilative branch pipe 4.

The fuel tank injection branch pipes 2 are provided with a plurality of pipes (the number of the pipes is the same as that of the fuel tanks 5), one ends of the pipes are respectively connected into the corresponding fuel tanks 5, and the other ends of the pipes are communicated with the fuel tank injection main pipe 1.

The overflow and ventilation branch pipes 3 are provided with a plurality of branches (the number of the branches is the same as that of the fuel oil cabins 5 and 6), one ends of the branches are respectively connected into the corresponding

fuel oil cabins

5 and 6, and the other ends of the branches are communicated with the overflow and ventilation main pipe 4.

The fuel overflow cabin 6 and the overflow and ventilation main pipe 4 are both provided with ventilation pipes 7.

And a filling station isolating valve 8 is arranged on the fuel tank filling main pipe 1.

The fuel tank filling isolating valve 9 is arranged on the fuel tank filling branch pipe 2.

A safety pressure relief pipe 10 is further connected between the fuel tank injection main pipe 1 and the fuel overflow tank 6, and a safety valve 11 is arranged on the safety pressure relief pipe 10.

The ventilation pipe 7 is provided with a ventilation pipe head 12.

An overflow alarm box 13 is arranged on the overflow and ventilation branch pipe 2 communicated with the fuel overflow cabin 6.

The utility model discloses sharing ventilative structure sets up overflow and breather pipe 4 respectively for every fuel tank 5, and each overflow breather pipe 4 converges to overflow and breather main 3, with fuel overflow to fuel overflow tank 6, fuel overflow tank 6 sets up the permeability cell for the benchmark according to the cross-sectional area of overflow and breather main 3 to satisfy all 5 ventilative requirements in fuel tank. When the pipe diameter of the overflow and ventilation main pipe 3 is designed, the cross-sectional area of the pipeline at least meets the maximum cross-sectional area of the overflow pipe of two overflow and ventilation branch pipes 4, and meets the requirements of the classification society standards.

Compare traditional mode, the utility model discloses fuel tank 5 does not set up the air hose alone among the ventilative structure of sharing, and overflow holds concurrently ventilative house steward 3 and does the sharing permeability cell of a plurality of cabin cabinets concurrently. Meanwhile, only one vent pipe 7 is arranged on the overflow and vent main pipe 3, and at the moment, the pipe diameter size of the vent pipe 7 needs to meet the standard requirement of the entry classification society.

The utility model discloses ventilative structure of sharing specifically uses as follows:

1) And (3) filling the fuel tanks 5, namely opening the isolating valve 8 through a port or starboard filling station on the ship, passing through the fuel tank injection main pipe 1, and then entering the corresponding fuel tank 5 through the fuel tank injection branch pipe 2 and the corresponding filling isolating valve 9 of the fuel tank 5. The size of the fuel tank injection main pipe 1 needs to meet the technical requirement of fuel filling amount of the ship in unit time, and the flow speed of fuel (diesel oil) in the pipe does not exceed 1.7m/s under the general condition. In order to meet the requirement that each fuel compartment 5 can be filled independently according to the maximum flow, the pipe diameter of the fuel compartment injection branch pipe 2 of each fuel compartment 5 is designed to be the same as that of the fuel compartment injection main pipe 1. In addition, in order to prevent overpressure when filling the fuel tank 5, a safety valve 11 needs to be installed on the safety relief pipe 10 as an overpressure prevention measure, and once the safety valve 11 is opened due to overpressure of the fuel tank injection main pipe 1, the fuel tank injection main pipe 1 is relieved and discharged to the fuel overflow tank 6.

2) The fuel oil cabins 5 are ventilated, overflow and ventilation branch pipes 4 are designed on each fuel oil cabin 5 and each fuel oil overflow cabin 6 and converge to the overflow and ventilation main pipe 3. When fuel oil is filled, gas discharged in the same proportion in the fuel oil tank is ventilated to the overflow and ventilation main pipe 3 through the overflow and ventilation branch pipe 4, and is discharged to the atmosphere in a safe area above a main deck through the ventilation pipe 7 and the ventilation pipe head 12 on the overflow and ventilation main pipe 3 and/or the ventilation pipe 7 and the ventilation pipe head 12 on the fuel oil overflow tank 6.

3) The fuel tank 5 overflows, and when the fuel tank 5 is filled and overflows, the fuel is discharged into the fuel overflow tank 6 through the overflow and ventilation branch pipe 4 and the overflow and ventilation main pipe 3 and the overflow alarm box 13.

The utility model discloses a ventilative structure of sharing still needs to pay attention to when arranging:

1) The fuel overflow main pipe 3 is arranged with a certain inclination according to the fuel flow direction and is discharged to the fuel overflow cabin 6;

2) The arrangement of the fuel tank overflow branch pipe 4 and the fuel overflow main pipe 3 is required to meet the requirements of ship integrity and damage stability;

3) The fuel is discharged to the fuel overflow cabin 6 through the fuel overflow main pipe 3, although the fuel is injected in a non-power mode, the vent pipe 7 on the fuel overflow cabin 6 is preferably designed to be enlarged in a certain proportion on the basis that the requirement of classification society specifications is met.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims

1. The utility model provides a be applied to ventilative structure of sharing of marine fuel tank which characterized in that: the system comprises a fuel tank injection main pipe, fuel tank injection branch pipes, an overflow and ventilation main pipe and overflow and ventilation branch pipes;

the fuel tank injection branch pipes are provided with a plurality of branch pipes, one end of each branch pipe is respectively connected into the corresponding fuel tank, and the other end of each branch pipe is communicated with the fuel tank injection main pipe;

2. The common venting structure for a fuel tank of a ship according to claim 1, wherein: a safety pressure relief pipe is connected between the fuel tank injection main pipe and the fuel overflow tank;

and a safety valve is arranged on the safety pressure relief pipe.

3. The common venting structure for a fuel tank of a ship according to claim 1, wherein: and a ventilation pipe head is arranged on the ventilation pipe.

4. The common venting structure for a fuel tank of a ship according to claim 1, wherein: and an overflow alarm box is arranged on the overflow and ventilation branch pipe communicated with the fuel overflow cabin.

5. The common venting structure for a fuel tank of a ship according to claim 1, wherein: the cross-sectional area of the pipeline of the overflow and ventilation main pipe is at least equal to that of the pipeline of the two overflow and ventilation branch pipes.

6. The common venting structure for a fuel tank of a ship according to claim 1, wherein: the pipe diameter of the fuel cabin injection main pipe is the same as that of the fuel cabin injection branch pipe.