JPS6235951B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hatch cover for, for example, a container ship.

As shown in FIG. 1, the hatch cover 1 of a container ship is large in length, width, and depth due to its functions. Furthermore, since the container 2 is mounted on top of it, its strength is high, contributing to increasing the strength of the hull. On the other hand, container ships have the following problems.

Container ships are generally fast and have a fattening coefficient: Cb
(Block Coefficient) is small, and therefore the hull is always in a hogging state during operation (ballasted and fully loaded). In particular, there are many cases where the maximum hogging bending moment occurs when the hull is loaded, requiring greater strength in the center of the hull, leading to increased costs.

Since the capacity of the hold 3 is large, the capacity of the ballast tank 4 tends to be insufficient, making it difficult to secure sufficient water when the vessel is under leg cargo.

Although the height of the lateral metacenter is smaller than that of a bulky ship, it is still bottom-heavy and has a short oscillation cycle when its legs are loaded, resulting in poor ride comfort.

Therefore, the present invention provides a hatch cover that solves these problems.The main feature of the present invention is that the hatch cover body is configured in the shape of a sealed box, and the hatch cover body has a water inlet with a water inlet and a water inlet with a water inlet. A drain outlet, an air supply/exhaust port with a socket, and a communication port with a socket that can communicate with the drainage port with a socket on the adjacent hatch cover body are provided, and the air supply/discharge port with a socket is provided with a tilting type air supply/discharge port. According to this configuration, water can be poured into the hatch cover and used as a strength member during operation.
It can sufficiently resist the hogging bending moment, there is no need to make the center part of the hull particularly strong, and costs can be reduced. Additionally, the hatch cover filled with water can be used as a ballast tank, ensuring sufficient water intake when the legs are loaded. Furthermore, the water-injected hatch cover can eliminate bottom-heavy conditions, lengthen the oscillation cycle, and improve riding comfort.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 2 and 3. 5 is the hatch cover body, which is in the shape of a sealed box, and includes a water inlet 6 with a tap;
It has a drain port 7 with a pot and an air supply/discharge port 8 with a pot. Reference numeral 9 denotes a pair of communication ports provided on the opposite side of the hatch cover main body 5 on the hull center side, and these communication ports 9 and the drain ports 7 of the hatch cover main body 5 on the hull center O side opposite thereto are a pair of communication ports 9. They are communicated by a communication hose 10. Reference numeral 11 denotes a tiltable air supply and discharge pipe arranged at the air supply and discharge port 8 via a swivel joint 12; 13 a drain port with a socket provided in each hatch cover main body 5;
Reference numeral 14 is a water supply pipe with a tap installed on the upper deck 15, and its faucet is connected to the water inlet 6 via a water supply hose 16. 17 is upper deck 1
Drainage route formed inside the hull from 5 to the side, 1
Reference numeral 8 denotes a drainage hose whose lower end is connected to the upper end of the drainage path 17 and whose upper end is connected to each drain port 7;
9 is a glass gauge for water level detection provided on the end face of the hatch cover main body 5, and 20 is a hatch combing.

In the above configuration, when injecting water into the hatch cover main body 5, the air supply/discharge pipe 11 is erected as shown in FIG. Close the pot and open the drain port 7, communication port 9, and water inlet 6 of the hatch cover body 5 on the side of the center O of the hull. Next, when the water supply pipe 14 is opened,
From the water supply pipe 14 to the water supply hose 16 and the water inlet 6
Water is injected into each hatch cover body 5 through the hatch cover body 5, and air within each hatch cover body 5 is released to the atmosphere through the air supply/discharge port 8 and the air supply/discharge pipe 11. The water level within each hatch cover body 5 can be viewed through a glass gauge 19. When the inside of each hatch cover main body 5 is filled with water, each open hole is closed and the air supply/discharge pipe 11 is folded down as shown in FIG. 2 so that it does not get in the way.

Next, when draining the water inside each hatch cover body 5, the air supply/discharge pipe 11 is erected, and then the outlet of the air supply/discharge port 8 is opened, and the outlet of the drain port 7 is opened. As a result, the water in each hatch cover main body 5 is discharged out of the boat via the drain port 7, the drain hose 18, and the drain path 17.

Next, when opening the hatch, after draining the water in each hatch cover body 5, each hose 10, 1
After removing the hatch covers 6 and 18, each hatch cover main body 5 can be lifted up.

Although the above embodiment has been explained using a container ship as an example, it goes without saying that the present invention can also be applied to other ships.

As described above, according to the hatch cover of the present invention, water can be poured into the hatch cover during operation and used as a strength member.
It can sufficiently resist the hogging bending moment, there is no need to make the center part of the hull particularly strong, and costs can be reduced. Additionally, the hatch cover filled with water can be used as a ballast tank, ensuring sufficient water intake when the legs are loaded. Furthermore, the water-injected hatch cover can eliminate bottom-heavy conditions, lengthen the oscillation cycle, and improve riding comfort. Moreover, when water is supplied to the hatch cover body, the tiltable air supply/discharge pipe connected to the air supply/discharge port with a lock is erected. By closing the hatch cover, the full state can be maintained, and even if the ship shakes, the water inside the hatch cover body will not shake, and the stability of the ship will be sufficiently ensured. In addition, the water inlet, drain outlet, and air supply/exhaust outlet each have a socket, so each hatch cover can be filled with water individually. Therefore, the locations of the hatch cover to be filled with water can be set in detail according to each situation. and can be used effectively.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a container ship, FIGS. 2 and 3 show an embodiment of the present invention, FIG. 2 is a plan view, and FIG. 3 is a partially cutaway front view. 1...Hatch cover, 5...Hatch cover body, 6...Water inlet, 7...Drain port, 8...Air supply/exhaust port, 9...Communication port, 14...Water supply pipe, 17...
Drainage route.

Claims (1)

[Claims] 1. The hatch cover main body is configured in the shape of a sealed box, and the hatch cover main body has a water inlet with a socket, a drain port with a socket, and an air supply/discharge port with a socket,
A hatch cover characterized in that a communication port with a socket that can communicate with a drainage port with a socket of an adjacent hatch cover main body is provided, and a tiltable air supply/discharge pipe is connected to the air supply/discharge port with a socket.