Low flash point fuel marine vent

Abstract

The application provides a low flash point fuel ship ventilation device, which comprises a ventilation box, a plurality of users of a dual fuel equipment share a ventilation box, and one side wall of the ventilation box is directly connected with the atmosphere. The application can make the same type of double-wall pipes of multiple users share a ventilation box, and share a dangerous air inlet or a dangerous air outlet. For example, 18 dangerous area air inlets / outlets are simplified into 4 dangerous area air inlets / outlets, so that the dangerous range of the ventilation opening of the dangerous area is greatly reduced, and more positions can be considered for opening ventilation openings in the ventilation design of other safe areas on the outer plate, thereby greatly reducing the design difficulty.

Description

Technical Field

[0001] This invention belongs to the field of ship design technology, and specifically relates to a ventilation device for ships using low flash point fuels. Background Technology

[0002] According to the International Safety Code for Ships Using Gas or Other Low Flash Point Fuels (IGF Code), equipment using low flash point fuels must have a double-walled pipe or similar ventilation duct for the low flash point fuel piping system. The inner pipe contains gaseous fuel, and the space between the inner and outer pipes is equipped with negative pressure mechanical ventilation, with a ventilation capacity of at least 30 air changes per hour.

[0003] According to the IGF Code, the ventilation system of double-walled pipe and gas valve unit spaces within gas safety machinery spaces should be independent of all other ventilation systems, and the hazard zone classification of the ventilation ducts of double-walled pipes should be the same as that of the ventilated spaces, i.e., it must be defined as hazard zone 1, with strict distance requirements from the ventilation openings of safe zones.

[0004] When a ship type has a high level of technology, the safety area ventilation openings for normal ventilation already occupy a lot of space, and there are many dual-fuel equipment in such ships, possibly as many as 9 units; if the conventional design is followed, the air inlet and outlet of each equipment are designed separately, requiring up to 18 ventilation openings. Considering the space required for ventilation openings in dangerous areas, so many ventilation openings in dangerous areas will inevitably affect the design of other normal ventilation systems, causing the ship design to be unable to proceed and affecting delivery. Summary of the Invention

[0005] To address the problem of excessive ventilation openings and large space occupation in hazardous areas in existing ship designs, this application proposes a ventilation device for low flash point fuel ships, including a ventilation box. The ventilation ducts of multiple users of dual-fuel equipment share one ventilation box, and one side wall of the ventilation box is directly connected to the atmosphere.

[0006] Furthermore, the user's ventilation duct is directly connected to the ventilation box.

[0007] Furthermore, the ventilation duct has an inverted U-shaped design, with one end connected to the user's double-walled duct and the other end entering the ventilation box from the top.

[0008] Furthermore, the ventilation box is installed on the outer hull plate, which has a large opening that directly connects to the atmosphere.

[0009] Furthermore, louvers are installed at the positions corresponding to the large opening in the ventilation box.

[0010] Furthermore, a protective net is installed on the outside of the louvers.

[0011] The ventilation device for low flash point fuel ships provided by this invention has the following advantages over the prior art: This invention allows multiple users with the same type of double-walled pipes to share a single ventilation box and share hazardous air inlets or outlets. For example, 18 hazardous area air inlets / outlets can be simplified to 4 hazardous area air inlets / outlets. This greatly reduces the hazardous range spread by the hazardous area ventilation openings, and the ventilation design of other safe areas on the outer panel can consider opening ventilation openings in more locations, greatly reducing the design difficulty. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0013] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0014] Reference Figure 1 This application proposes a ventilation device for low flash point fuel ships, comprising a ventilation box (1), louvers (2), and a protective net (3). Ventilation pipes for multiple users of the dual-fuel system enter the ventilation box (1) from the top via an inverted U-shaped design and terminate inside the ventilation box (1). The ventilation box (1) is installed on the hull plating, with a large opening on the plating directly connecting it to the atmosphere. The large opening of the ventilation box is fitted with louvers (2), a design that prevents external rainwater from flowing back to the users through the ventilation pipes. A protective net (3) is installed on the outside of the louvers (2) to prevent debris from entering the ventilation box.

[0015] This application allows multiple users with the same type of double-walled pipes to share a single ventilation box and share hazardous air inlets or outlets. For example, 18 hazardous area air inlets / outlets can be simplified to 4 hazardous area air inlets / outlets. This can greatly reduce the hazardous range spread by the hazardous area ventilation openings. The ventilation design of other safe areas on the outer panel can consider opening ventilation openings in more locations, greatly reducing the design difficulty.

[0016] In summary, these are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent changes and modifications made in accordance with the scope of the present invention and the contents of the specification are within the scope of the present invention.

Claims

1. A ventilation device for low flash point fuel ships, comprising a ventilation box, characterized in that: In a dual-fuel device, the ventilation ducts of multiple users share a single ventilation box, one side wall of which is directly connected to the atmosphere.

2. The apparatus according to claim 1, characterized in that: The user's ventilation duct is directly connected to the ventilation box.

3. The apparatus according to claim 2, characterized in that: The ventilation duct has an inverted U-shaped design, with one end connected to the user's double-walled duct and the other end entering the ventilation box from the top.

4. The apparatus according to claim 1, characterized in that: The ventilation box is installed on the outer hull plating, which has a large opening that directly connects to the atmosphere.

5. The apparatus according to claim 4, characterized in that: The ventilation box is equipped with louvers at the position corresponding to the large opening.

6. The apparatus according to claim 5, characterized in that: A protective net is installed on the outside of the louvers.

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