JPS6036231A - Bulk cargo unloading device - Google Patents

Abstract

PURPOSE:To eliminate the necessity of laying an unloading device on a bulk cargo ship to reduce the cost of the ship, by providing a stationary floatage adjusting tank in the lower section of the bulk cargo ship, and by providing a belt conveyor constituting an unloading device and communicated with an on-land installation. CONSTITUTION:One end of an underwater belt casing 5 is coupled to an on-land belt casing which is supported on a quay, and a belt conveyor 6 is disposed in this casing 5. The other ends of the above-mentioned casing 5 and the conveyor 6 are laid in an opening section of a floatage adjusting tank 11. Meanwhile, the above-mentioned tank 11 is formed with a receptacle 17 which is met with a hull bottom opening 8 in the hull 1 of a bulk cargo ship, and is provided with a pump 13 for discharging residual water between a hull bottom opening gate 9 and a main device opening gate 10, an air charge and discharge pipe 14 and a water charge and discharge pipe 15. With this arrangement, after the tank 11 is positioned in the lower section of the hull 1, bulk cargo within a hold 2 is unloaded onto the land by means of the conveyor 6.

Description

[Detailed description of the invention] The present invention relates to a bulk cargo unloading device.

In conventional bulk carriers, as shown in the vertical cross-sectional view in FIG. 1 and the cross-sectional view in FIG. The cargo is dropped from the opening, and the belt conveyor 06 provided at the bottom of the hull 01 is operated to transport it to the belt conveyor 06a and the belt conveyor 06 in the inboard belt casing 05.
b, and then transported to the quay 07 via a belt conveyor 06c in an outboard belt casing 04 installed on the ship.

However, such a bulk cargo unloading device requires a belt casing 05 with a large capacity inside the ship, which reduces the capacity of the hold accordingly. Since this requires the installation of similar unloading equipment, the cost of the ship will increase accordingly.

The present invention was proposed in view of the above circumstances, and an object of the present invention is to provide a bulk cargo unloading device that reduces the cost of bulk carriers.

To this end, the present invention provides a buoyancy adjustment tank that is immersed in water near a quay and can float up and down by parasting, one end of which is connected to the upper opening of the buoyancy adjustment tank via a watertight opening/closing door, and the other end of which is connected to the upper end opening of the buoyancy adjustment tank through a watertight opening/closing door. A watertight conveyor cage extends through the buoyancy adjustment tank to an appropriate height above the water surface and incorporates a longitudinal belt conveyor, and a watertight conveyor cage surrounds and protrudes from the upper end opening and contacts the bottom opening of the bulk carrier in a watertight manner. The present invention is characterized by comprising a backing, and a belt conveyor having one end pivotally connected to the other end opening of the conveyor cousing and the other end extending on the quay.

One embodiment of the present invention will be explained with reference to the drawings. Fig. 3 is a longitudinal cross-sectional view showing a bulk carrier being unloaded by this device;
The figure is a cross-sectional view taken along IV-IV in Fig. 3, Fig. 5 is a sectional view taken along V-■ in Fig. 4, Fig. 6 is a partially enlarged view of Fig. 4, and Figs. FIG. 8 is a cross-sectional view taken along the lines ``---'' and 1''--'' in FIG. 6, respectively.

In the above diagram, 1 is the bulk ship body (hereinafter referred to as the main ship body), 2-a to 2-e are hopper-shaped holds, 3-a and 3-b are the hold opening doors of each hold, and 3-a is the starboard side.
3-b is the port side. 4 is a land belt casing supported by a support tower 16 established on the quay 7; 5 is an underwater belt whose one end passes through the buoyancy adjustment tank 11 and opens at the upper end thereof, and whose other end extends diagonally upward through the water surface. casing, 6
A belt conveyor is built into the underwater belt casing 5 and extends in its longitudinal direction; 7 is a quay; 8 is a bottom opening; and 9 is a bottom opening door, which has a wedge-shaped cross section to maintain watertightness when closed. Reference numeral 1o denotes an opening door for this device, which has a wedge-shaped cross section to maintain watertightness when closed. 11 is a buoyancy adjustment tank; 12 is a drainage pump for draining water remaining between the bottom opening door 9 and the unloading device opening door 1o; 13 is a drainage pipe;
Reference numeral 14 denotes an intake and exhaust pipe, one end of which opens onto land. Reference numeral 15 denotes a suction and drainage pipe, which is connected to a pump (not shown). Reference numeral 16 denotes a support tower established on the quay 7, which pivotally supports the land belt casing 4 so that it can slide and rotate up and down.

Reference numeral 17 denotes a socket of this device, and a rubber gasket is pasted to the bottom opening 8 of the ship so as to make watertight contact therewith.

In such a device, first, before the main vessel 1 berths, the device is submerged to a depth below the bottom of the main vessel by injecting water from the suction/discharge pipe 15 in advance.

At this time, the air for buoyancy adjustment is discharged from the intake and exhaust pipes 14, so that the device can easily sink.

Next, place the main body so that the bottom opening 8 of the hold 2 is connected to the socket 17 of this device.
After bringing the vessel to a position directly above it, moor the vessel.

Then, the drain pump (not shown) is activated and the suction/drainage pipe 1
When water is drained from the tank 5, air is automatically sent into the buoyancy adjustment tank 11 from the intake and exhaust pipe 14, causing the device to float.

Therefore, when the socket 17 of this device rises to the position of the bottom opening 8, the drainage from the suction and drainage pipe 15 is temporarily stopped, and the drainage pump 12 is activated to open the bottom opening door 9 and the bottom opening door 1o of the device.
The water between them is drained into the buoyancy adjustment tank 11 via the drain pipe 13.

At this time, whether or not the drainage has been completed is displayed on land via a sacer (not shown) installed in the drain pipe 13 that detects the presence or absence of an amount of water.

If drainage does not finish after a predetermined period of time has passed, water is leaking due to poor adhesion between the hull and this device, so turn on the drainage pump again to increase the buoyancy of the buoyancy adjustment tank 11. It operates and drains water from the suction and drainage pipe 15.

After confirming that drainage between the bottom opening door 9 and the device opening door 1o has been completed, the bottom opening door 9 and the device opening door 10 are closed.
is opened by a drive device (not shown).

Thereafter, when the hold opening doors 3-a, 3-f) are opened by a drive device (not shown) and the belt conveyor 6 is started at the same time, the cargo in the hold 2 falls onto the belt conveyor 6, and then carried overboard.

As the cargo in hold 2 gradually decreases, the hull becomes lighter (
The draft becomes shallower, but this device has a buoyancy adjustment tank 11.
Since it is in close contact with the hull due to the buoyancy of , it rises together with the main hull 1.

At this time, the land belt casing 4 supported by the support tower 16 attached to the land of the quay 7 also rises by N while remaining parallel to the main hull 1.

When unloading of one hold 2 is interrupted or completed, the hold opening doors 3-a and 3-b are closed by the drive device, and the bottom opening door 9 and the unloading device opening door 10 are also closed by the drive device.

When moving to unloading from another hold, by injecting water into the buoyancy adjustment tank 11 from the suction/drainage pipe 15 using a drainage pump, the device is separated from the main hull 1 and is temporarily submerged slightly, the same as when unloading from the first hold 2. Repeat the operation.

With such a device, there is no need to equip each ship with a loading device, which reduces ship construction costs, and eliminates the need for space for loading devices inside the ship, as shown in Figure 3. Loading efficiency is improved by increasing the loading capacity by 2-e in the hold.

In short, according to the present invention, there is provided a buoyancy adjustment tank that is immersed in water near a quay and can float up and down by parasting, one end of which is connected to the upper end opening of the buoyancy adjustment tank via a watertight door, and the other end of which is a watertight conveyor casing that penetrates the buoyancy adjustment tank and extends to an appropriate height above the water surface and houses a longitudinal belt conveyor; a vanokink that protrudes around the upper end opening and contacts the bottom opening of the bulk carrier in a watertight manner; The present invention provides a bulk cargo unloading device that reduces the cost of bulk carriers by providing a belt conveyor whose one end is pivotally connected to the other end opening of the conveyor casing and whose other end extends above the quay. Above all, it is extremely useful.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing a known bulk carrier, Fig. 2 is a cross sectional view taken from FIG. 4 is a cross-sectional view along tv-tv in FIG. 3, FIG. 5 is a sectional view along V-■ in FIG. 4, and FIG. 6 is a portion of FIG. 4. The enlarged views, FIG. 7, and FIG. 8 are cross-sectional views taken along lines 1--2 and Vllll-Vllll of FIG. 6, respectively. 1... Bulk vessels (main hull), 2 a, 2 b--26'' hold, 3'' + 3
b + 3 c... Hold opening door, 4... Land belt casing, 5... Underwater belt casing, 6...
Belt conveyor, 7... quay, 8... bottom opening, 9
...lIotM opening door, 10...lifting device opening door,
11... Floating Cal monitoring 7ri, 12... Drain pump,
13... Cedar water pipe, 14.15... Suction and drainage pipe, 16
...Support tower, 17...Unloading device socket. Sub-Agent Patent Attorney Masafumi Tsukamoto

Claims (1)

[Claims] A buoyancy adjustment tank that is immersed in water near a quay and can float up and down by parasting; one end is connected to the upper opening of the buoyancy adjustment tank via a watertight door, and the other end is connected to the top opening of the buoyancy adjustment tank and connected to the water surface. a watertight conveyor casing that extends upward to a suitable height and houses a longitudinal belt conveyor; a backing that protrudes around the upper end opening and comes into contact with the bottom opening of the bulk carrier in a watertight manner; A bulk cargo unloading device comprising: a belt conveyor pivotally connected to an end opening and having the other end extending above a quay.