JPS5925714B2 - Watertight maintenance device for bottom door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a watertight maintenance device for a bottom door used in an ocean dumping ship or the like.

Conventional ocean dumping ships have an opening/closing door in the opening at the bottom of the hold shaped like a hopper. One end of this door is attached so that it can be opened/closed around a shaft attached to a hinge, and the other end is equipped with a door for opening/closing. A chain is connected and the door is pressed against the hull packing by pulling up the chain to maintain watertightness, but it is extremely difficult to maintain watertightness of a large opening/closing door using only the chain.

In other words, it is necessary to hold and fix the chain with a winder installed on the upper deck, and the longer the distance to the place where it is held and fixed, the longer the length of the chain will be. If this is done, a gap will be created between the door and the hull due to the sagging of the cheno, making it impossible to maintain watertightness at all times, resulting in discarded material leaking out during navigation and contaminating the sea area.

Therefore, recently, a double door structure has been proposed in which an opening/closing door is provided above the opening/closing door, and a pump is also installed to drain out the seawater that has entered between the two doors.

This configuration can prevent the leakage of dumped materials, but on the other hand, the configuration of the opening/closing door is complicated, making it difficult to maintain complete watertightness, and furthermore, the cargo volume loaded in the hold is reduced. It had the following problems.

The purpose of the present invention is to solve the above-mentioned problems, and in order to make even a single bottom door completely watertight and to support the load applied to the door during voyage, the bottom door is A rust-shaped stopper that can move forward and backward is connected to multiple hydraulic cylinders that push and support the lower side of the periphery, and when this stopper is tightened, the bottom door is pressed against the hull gasket by force, and the weight of the dumped material is constantly reduced. The object of the present invention is to provide a device that can provide support and maintain complete watertightness.

An embodiment of the present invention will be described below based on the drawings.

In the drawing, 1 is an ocean dumping ship, and its hold 2 is formed by a bulkhead 3 in the form of an inclined chute.

A chevron-shaped member 4 is provided at the center of the bottom of the hold 2, thereby forming a pair of left and right hopper-shaped dumping ports 5, 5.

These dumping ports 5, 5 are provided with a bottom area 8.8 that can be opened and closed via the axis γ of a hinge member 6 attached to the side of the chevron member 4, and the opening and closing is controlled by a winch device 10 provided on the upper deck 9,
This is done by connecting ten chenos 11, 11 to the free ends of the bottom worlds 8, 8.

Further, hinge plates 12 are provided protrudingly provided at a plurality of locations in the longitudinal direction of the proximal end of the bottom area 8, and are engaged with the hinge member 6 by the shaft I.

The shaft hole of the hinge member 6 has an elongated hole 13 in the vertical direction, so that the door can be closed without completely tightening the hull packing 14 when the door is closed.

Furthermore, a plurality of supported metal objects 15 are fixed to positions other than the hinge members 6 and hinge plates 12 for opening and closing the bottom area 8, that is, to the side surfaces of both ends in the width direction of the door. A movable wedge body 17 is attached to both sides so as to be swingable around a pin 16 and has an inclined surface at the lower part.

In order to support the load applied to the bottom area 8 and maintain watertightness, a wedge-type stopper device 18 is installed at each of the five dumping ports to press and support the movable wedge body 1γ of the supported hardware 15 attached to both ends of the bottom area 8. Lower hull 19A,
It is provided on the 19B side.

This stopper device 18 includes a hydraulic cylinder 21 installed on a support base 20, a round bar-shaped stopper 22 connected to the hydraulic cylinder 21 and having an inclined top surface at its tip, and bearings 23A and 23B that support this stopper 22. The bearings 23A and 23B are connected to the hulls 19A and 19.
B-side partition walls 24A, 24B and reinforcing members 25A, 25
It is attached to B with bolts and nuts.

Next, when each dumping port 5, 5 is closed, the Chenos 11, 11 connected to the winch devices 10, 10 provided on the upper deck 9
As shown in FIG. 3, as shown in FIG. 3, the bottom area 8 is rotated from the open position shown by the dotted line to the position shown by the solid line, thereby closing each of the dumping ports 5, 5.

Then, a stopper is applied to each of the winch devices 10, 10 to stop each cenograph 11, 11, thereby supporting the load of the load on each bottom area 8, 8.

In addition, when the closing action of the door is terminated to prevent the leakage of the cargo and maintain the watertightness of the bottom area 8, as shown in Fig. 4,
Hull 19A on both sides of dumping ports 5 and 5.

Each stopper 22, 22 connected to the stopper device 18° 18 provided at the opposite position of 19B is simultaneously extended by the hydraulic pressure of the cylinder 21 on the left and right sides, and the upper inclined surface of the tip is brought into contact with the lower surface of the movable wedge bodies 17, 17. When both ends of the door are pushed up, the shaft 7 inserted into the oval hole 13 of the hinge member 6 at the base end of the door moves upward along the oval hole 13 and comes into play with the base end of the bottom area 8. The upper surface of the end is the packing with the hull 14, 14
It is possible to keep the cargo in the hold completely watertight at all times.

Furthermore, after the ship arrives at the dumping area, when opening the bottom area 8 in order to dump the loaded cargo in the hold 2, the stopper devices 18, 18 are operated in reverse to the above-mentioned closing action, and each stopper 22, 22 is opened. At the same time, each ceno 11 wound around the winch device 10 and 10 on the upper deck 9
, 11 by remote control to open the bottom world 8, 8,
It jettisons its payload in one movement.

According to the invention described in the embodiments above, a packing is provided around the lower surface of the hopper-shaped dumping port in the lower part of the ship's hold, and a bottom area is provided below the packing with movable wedge bodies attached to both sides. A hinge member having an elongated hole in the vertical direction is provided on one side of the hinge member, and the hinge member is supported in an openable and closable manner via a shaft in the elongated hole of the hinge member, and a stopper device is provided on the hull side of the lower side of the dumping port. This stopper device connects a hydraulic cylinder and a stopper so that it can move in and out, and when the stopper is protruded, the stopper comes into contact with the inclined surface of a movable wedge body provided at the bottom of the ship and presses the bottom of the ship toward the packing side. This makes it possible to simplify the structure of the bottom area provided at the dumping port at the bottom of the cargo hold, and to increase the loading capacity of the cargo hold.

In addition, the protrusion of the stopper connected to the hydraulic cylinder allows the bottom of the ship to be evenly pressed against the packing on the lower surface of the dumping port, thereby extending the life of the packing and easily counteracting wear of the packing. .

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a cross-sectional view of an ocean dumping ship, FIG. 2 is a plan view of the main part, and FIG.
FIG. 4 is a side view taken along the line B--B in FIG. 2; 1... ocean dumping ship, 2... hold, 3.
...Bulkhead, 4...Chevron member, 5...
...Dumping port, 6...Hinge material, 8...
Ship bottom world, 11...Ceno, 13...Oval hole, 14...Putskin, 15...Supported hardware, 16... Pin, 1γ...Movable wedge body, 18...Stopper device, 19A
, 19B... Hull, 21... Hydraulic cylinder, 22... Stopper, 23A. 23B...Bearing, 24A, 24B...
bulkhead.

Claims (1)

[Claims] 1. A packing is installed around the lower surface of the hopper-shaped dumping port in the lower part of the hold, and below this packing is a bottom door with movable wedge bodies attached on both sides. A hinge member having an oblong hole is provided, and a stopper device for the bottom door is provided on the hull side of the lower side of the dumping port, and this stopper A watertight maintenance device for a bottom door, characterized in that the device connects a hydraulic cylinder and a stopper so that it can be moved in and out, and when the stopper is extended, the stopper comes into contact with the inclined surface of a movable wedge body provided on the bottom door.