JPH04237695A - Unloading system of bulk carrier - Google Patents

Abstract

PURPOSE:To provide an unloading system of a bulk carrier which is a freighter which transports bulk cargo which is like lump, particle, and powder and of low fluidity, and a freighter of separated cargo chamber type in which the inside of the freighter is divided into many chambers which are separated mutually and completely to avoid sinking of the freighter even when it collides a part of it is destructed, and water enters the inside of it. CONSTITUTION:An unloading system in a bulk carrier which is of separated cargo chamber type is characterized in that it consists of a stroke type reclaimer 11 due to a reciprocal cylinder 12 which is mounted on an inclined bottom section 4 of each separated cargo chamber 2, a water-tight gate 15 which is provided in the lowest region of the bottom section 4 and is controlled automatically, and a series of conveyors ranging from a dividadly delivering conveyor 8 which is installed on the bottom 6 of the carrier below the cargo chambers 2 to a dewatering conveyor 10 which is installed on board.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automated bulk cargo unloading system for a bulk cargo transport ship with a cargo compartment isolated structure.

0002

[Prior Art] As shown in Figures 4 to 7, conventional bulk carriers with non-separated cargo compartments are broadly divided into a cargo compartment and an outer compartment in which conveyors, etc. are housed, but there is no separation between the two. Not isolated. In particular, in the discharge section at the bottom of the cargo hold, the material to be processed is not liquid but powder, granules, or lumps.
Not completely sealed.

In FIGS. 4 and 5, a plurality of cargo compartments 2 are divided by partitions 3 in the hull of a bulk cargo ship 1, and a sloped bottom 4 is formed in the lower part of the cargo compartment 2.
A cutting device 5 is provided in the lowest area of the bottom portion 4. A collection conveyor 7 is provided in the outer chamber 6 below the cutting device 5.
A cutting conveyor 8 is provided via. Further, a vertical transportation conveyor 9 is provided at one end of the outer chamber 6 to receive the cargo A from the cutting conveyor 8 and convey it to the ship.
0.

FIGS. 6 and 7 show a modified type of the conventional example, in which a plurality of cargo compartments 2 are installed in the hull of a bulk goods transport ship 1.
are arranged to be separated from each other on the left and right, and an inclined conveyor 9a for conveying the cargo A from the cut-out conveyor 8 onto the ship is provided between them.

[0005]

[Problem to be Solved by the Invention] Therefore, in such a conventional cargo ship, once a hole is created in a part of the hull due to a collision, seawater floods into the ship from there and eventually fills the entire inside of the ship. As a result, the ship was in danger of sinking. In order to deal with this problem, various ship structures are being considered, and there is a need to develop an unloading system that is essential for bulk carriers with a new cargo compartment isolated structure.

The present invention has been completed in view of the above circumstances, and is directed to a cargo ship that transports bulk, granular, powdery, or low-flowing bulk materials, and in which a part of the hull is destroyed due to a collision. To provide an unloading system for a bulk carrier in which the interior of the ship is divided into a number of rooms completely isolated from each other to prevent water from entering the entire inside of the ship and causing the ship to sink. It is an object.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an unloading system for a bulk carrier with separate cargo holds, in which a reciprocating cylinder is provided at the sloped bottom of each isolated cargo hold. It consists of a stroke-type reclaimer, a watertight gate installed at the lowest area of the bottom, and a series of conveyors from the cutting conveyor installed on the bottom of the ship below the cargo hold to the draining conveyor installed on the ship. A bulk carrier is characterized by an inner chamber and an outer chamber that are completely separated from each other by a separating plate.The inner chamber is sufficiently larger than the outer chamber and is used as a cargo hold, and is divided into several sections. A self-unloading system consisting of a watertight gate installed at the sloping bottom of each cargo hold, and a series of conveyors from the cutting conveyor installed in the outer compartment located directly below the watertight gate to the draining conveyor on the ship. It is. These series of conveyors are arranged in a communicating outer chamber, and their space is smaller than that of the inner chamber.

[0008]

[Operation] According to the above structure, when unloading bulk cargo, the reclaimer at the bottom moves back and forth in accordance with the reciprocating movement of the cylinder, and the cargo is forcibly moved to the central delivery section. Furthermore, the watertight gate in the unloading section opens under automatic control, and the cargo falls onto the cutting conveyor below, where it is automatically transported overboard. Here, since the reclaimer and cylinder are connected by a circular shaft, the seal is perfect. In addition, since the watertight gate is a completely automatic valve that seals when closed, in the event of a ship collision, all the watertight gates will automatically close, making the entire cargo hold watertight.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the same or equivalent parts as those in the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted. 1 and 2 show this embodiment, with FIG. 1 being a cross-sectional view and FIG. 2 being an enlarged longitudinal sectional view of one cargo compartment.

In this embodiment, a cargo compartment 2, which is an inner chamber consisting of an isolated wall 2a inside the hull of a bulk cargo ship 1, is divided into a plurality of parts by partitions 3, and a sloped bottom is provided at the lower part of the cargo compartment 2. A stroke type reclaimer 11 having a large number of wedge-shaped protrusions is disposed on each inclined bottom part 4, and this reclaimer 11 is operated by a reciprocating cylinder 12 provided on the hull 1 to It slides back and forth along 4. The reciprocating cylinder 12 is connected to the reclaimer 11 by a piston rod 12a, and the piston rod 12a and the wall 2a of the cargo compartment 2 are completely sealed by a watertight seal 13.

The reclaimer 11 has a rectangular plate shape with a constant width, and has a large number of wedge-shaped protrusions on its upper surface, so that it has the function of moving loose objects in only one direction. Its lower surface is smooth so that it slides on the bottom of the cargo compartment. As shown in FIG. 3, one reciprocating cylinder 12 is sufficient for each reclaimer 11, and the shaft seal of the watertight seal 13 is
Any seal for a circular shaft such as a ring will do.

A watertight gate 15 is provided in the lowest area of the bottom portion 4, and the opening and closing of the watertight gate 15 is automatically controlled via a dispensing device 14 such as a screw conveyor.
A cut-out conveyor 8 is disposed in the outer chamber 6 directly below. The watertight gate 15 is formed of a butterfly valve, a gate valve, etc., and is preferably an automated type such as an electric type or a hydraulic type. Note that the reference numeral 16 is a guide body, and the reference numeral 17 is a reinforcing plate.

Next, to explain the operation of this embodiment, when unloading the cargo A loaded in bulk, the reclaimer 11 at the bottom 4 of the cargo compartment is reciprocated by the rod 12a of the cylinder 12, and the cargo A is forcibly moved to the center. will be moved to the payout section. Furthermore, the cargo A is sent toward the watertight gate by the delivery device 14 consisting of a screw conveyor in the delivery section, the watertight gate 15 is automatically opened, and the cargo A falls from there to the cut-out conveyor 8 below, passing through various conveyors to the outside of the ship. automatically transported to. Here, since the reclaimer 11 and the reciprocating cylinder 12 are connected by the piston rod 12a having a circular cross section, sealing is easy.

Furthermore, since the watertight gate 15 is a completely automatic valve that seals when closed, all the watertight gates are automatically closed in the event of a ship collision, and the entire cargo compartment becomes watertight. In addition, in the case of the above-mentioned ship collision, it is sufficient to close the valves all at once by manually turning on the switches in the driver's cabin.

Furthermore, FIG. 8 shows another embodiment,
In this embodiment, the cutting conveyor 8a is divided into parts by partition plates 3, and the cargo A from the watertight gate 15 is transported to the cutting conveyor 8a.
a to the next cutting conveyor 8b via a hopper 18.

[0016]

Effects of the Invention As described above, according to the present invention, each cargo compartment is completely isolated from the hull, and the piston rod of the reciprocating cylinder that operates the stroke reclaimer provided at the sloped bottom and the lowest area of the bottom. The discharge gate installed in the cargo compartment is automatically controlled and completely watertight, so even if part of the hull is destroyed in a collision, the entire cargo hold is watertight, and the hull will be prevented from sinking. The series of conveyors, from the cutting conveyor installed on the bottom of the ship below the cargo hold to the draining conveyor installed on board, are completely isolated from each cargo hold, so damage countermeasures can be easily and quickly implemented. can.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a cross section of an embodiment according to the present invention.

FIG. 2 is a partially vertical cross-sectional explanatory diagram.

FIG. 3 is an enlarged perspective view of the watertight portion of the reciprocating cylinder.

FIG. 4 is an explanatory diagram of a longitudinal section of a conventional example.

FIG. 5 is an explanatory diagram of a cross section as well.

FIG. 6 is an explanatory diagram of a longitudinal section of another conventional example.

FIG. 7 is an explanatory diagram of a cross section as well.

[Explanation of symbols]

1 Hull 2 Cargo compartment 2a Cargo compartment wall 3 Partition plate 4 Sloped bottom 6 Outer chamber 8 Cutting conveyor 9 Conveyor for vertical transportation 10 Draining conveyor 11 Reclaimer 12 Reciprocating cylinder 12a Piston rod 13 Watertight seal 14 Dispensing device 15 Watertight gate A. Cargo

Claims (1)

[Claims] Claim 1: An unloading system for a bulk carrier with isolated cargo holds, comprising a stroke type reclaimer using a reciprocating cylinder provided at the sloped bottom of each isolated cargo hold, and a watertight reclaimer provided at the lowest area of the bottom. An unloading system for a bulk carrier comprising a gate and a series of conveyors from a cutting conveyor provided on the bottom of the ship below the cargo compartment to a draining conveyor provided on the ship.