JPH04310494A - Gathering ship for granular underwater resources - Google Patents

Abstract

PURPOSE:To gather granular resources more than a designated depth of water with high efficiency and to maintain the water quality in a gathering place by making granular underwater resources into slurry to be landed, forcing overflow water to overflow in a hold and then returning the overflow water to the bottom of water. CONSTITUTION:A slurry pipeline 4 is lowered to the water bottom 2 having a depth of water 50m or more from a hull 1, and the granular resources at the bottom of water is stirred by a granular resources gathering device 5 provided on the forward end of the pipeline 4, for example, a jet to be sucked by a slurry pump 3. The slurry is passed through the pipeline 4 and a large block or the like is screened by a screen 6 on a ship to be thrown in a hold 8 through a chute 7. In the hold, a solid matter is settled to the bottom, and the overflow water is returned as an overflow to the vicinity of the bottom of water through a pump 10, a pipe 11 and a water return pipe 12. Accordingly, even if a large quantity of slurry is treated by the slurry pump 3, a gathering water area will not be polluted.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vessel for collecting granular underwater resources, which is equipped with a slurry pump device for extracting granular resources from the underwater bottom at a depth of about 50 m with high efficiency.

0002

2. Description of the Related Art A grab bucket system, a slurry pump system, and the like are known as devices for collecting granular resources from the bottom of the water using a ship. Relatively shallow water bottom, e.g. 10-2
Resources at the bottom of the water at a depth of about 0 m can be collected using the grab bucket method, but at depths of 50 m or more, the grab bucket method has low collection efficiency and cannot be used. On the other hand, the slurry pump method has problems with water treatment, and there is a risk of contaminating the water at the sampling point, so there are problems with restrictions on capacity, vessel shape, etc.

0003

[Problem to be solved by the invention] The present invention has a water depth of 50 m.
It is an object of the present invention to provide a vessel for collecting granular underwater resources, which is capable of extracting granular resources of 200 mm or more from the underwater bottom with high efficiency and preserving the water quality at the sampling point.

0004

[Means for Solving the Problems] The present invention provides a slurry transport device for unloading granular underwater resources, an overflow device for storing the unloaded slurry in a ship hold and overflowing the overflow water, and This is a vessel for collecting granular underwater resources, which is characterized by being equipped with a return device for returning water to water. In this case, it is preferable that the slurry transport device is a pipeline that is an integral pipe that connects the slurry pump and the slurry piping and is placed on the deck so that it can be suspended.

[0005]

[Function] Since the granular bottom resource collection vessel of the present invention uses a pump system, it can collect granular bottom resources with high efficiency from the bottom of water at a depth of 50 m or more. In addition, by using the boat hold as a settling tank for slurry and returning the overflow water to the bottom of the water, it is possible to prevent water pollution in water bodies.

[0006]

Embodiment FIG. 1 shows an embodiment of the present invention, and FIG. 2 is a sectional view thereof. The embodiment comprises a slurry pipeline 4 lowered from the hull 1 to the bottom 2 of the water. The slurry pipeline 4 is equipped with a slurry pump 3. Underwater 2
A granular resource extraction device 5 is provided at the tip of the pipeline 4, and the granular resources at the bottom of the water are stirred by a jet, for example, and sucked by a slurry pump 3. The slurry passes through a pipeline 4, is sorted out for large lumps by a sorter 6 on the ship, and is charged into a hold 8 through a chute. Solids settle in the hold 8 and overflow water is discharged as an overflow 9 from the overflow device. Overflow water is pumped 10, pipe 11,
The water is returned to the vicinity of the bottom of the water via a water return device consisting of a water return pipe 12. That is, the pump 10 returns the overflow 9 from the ship's hold to near the bottom of the water via the pipe 11 and the return pipe 12. Therefore, even if a large amount of slurry is processed by the slurry pump, the sampling water area will not be contaminated. pipe 11
are integrally fixed along the pipeline 4. This pipeline 4 has a suspension device 1 as shown in FIG.
6 moves like 16a and lowers it into the water from the side of the hull 1.

The underwater resources stored in the hold 8 are sprayed with fresh water in the ballast tank 17 from the spray pipe 13 to remove salt and the like. The washing water is sufficiently filtered and then discharged by a discharge pump 14 through a discharge pipe 15. FIG. 3 shows an overall view of the embodiment of the sampling vessel, showing the arrangement of the pipeline 4, the chute 7, the hold 8, etc.

FIG. 4 shows the process from collecting sea sand to use as a material for concrete using the granular underwater resource collection vessel 1 of the present invention. (a) Resources from the water bottom (sea sand) are collected using the slurry pipeline 4. (b) Fresh water is sprayed from the spray pipe 13 to remove salt, and the salt water is thoroughly filtered and discharged. This eliminates the need for salt removal operations on land. (c) Hopper 2 on land using the landing device 22 at the unloading port 25
Unload in 3rd class. It is transported on land using the land transportation device 24. (d) The transport device 24 stores the transported sea sand in the storage 26 of the storage site 28. (e) The land loading device 27 is a transportation device 29 for the destination of use.
Load into. The transportation device 29 for use is loaded onto a small carrier 30 or transported directly to a concrete plant or the like where it will be used.

[0009]

[Effects of the Invention] According to the present invention, granular water bottom resources can be collected with high efficiency from the water bottom at a depth of 50 m or more, and water pollution of water bodies can be prevented by returning the overflow water to the water bottom. can do.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of an embodiment.

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 shows an overall view of the embodiment, (a) is a side view, (b)
) is a plan view.

FIG. 4 is a flow sheet from collection to use of granular underwater resources.

[Explanation of symbols]

1 Hull
2 Bottom 3 Slurry pump
4 Pipeline 5 Collection device
6 Sorting machine 7 Chute
8 Hold 9
overflow
10, 14 Pump 11 Pipe
12 Return water pipe 13 Spray pipe
15 Discharge pipe 16 Hanging device
17 Ballast tank 18 Frame

Claims (2)

[Claims] [Claim 1] A slurry transportation device for unloading granular underwater resources, an overflow device for storing the unloaded slurry in a ship hold, overflowing the overflow water, and a water return device for returning the overflow water to the underwater bottom. A vessel for collecting granular underwater resources. 2. A vessel for collecting granular underwater resources, wherein the slurry transport device is a pipeline that is an integral pipe that combines a slurry pump and a slurry pipe and is placed on the deck so that it can be suspended.