JP3901791B2 - Bulk carrier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bulk carrier which is an irregular solid cargo, and more particularly to a bulk carrier in which a vertical conveyor for unloading is installed at the bottom of a cargo hold.
[0002]
[Prior art]
In bulk carriers that transport irregular solid cargo consisting of loose materials such as ores, coal, limestone, wood chips, grains, cement, etc. Automatic loading and unloading equipment is provided to enable unloading even when the loading facility is incomplete, and the inundation when the hull is damaged due to grounding or collision does not sink into the entire ship. The patent applicants of the present invention presented these in Japanese Patent Application Laid-Open Nos. 5-124576 and 8-28135.
[0003]
In other words, the bulk carrier described in each of the above publications is divided into a plurality of front and rear halves by a bulkhead in the longitudinal direction of the hull so that the inside is a cargo hold, and the bottom wall of each cargo hold is aligned in the vertical direction of the hull. A vertical conveyor that extends in the vertical direction of the hull through the lower end of each hopper and a feed conveyor that extends from the delivery end to the upper deck and its delivery end. It has a structure with automatic loading and unloading equipment consisting of a conveyor for landing to be sent to a predetermined place on the wharf.
[0004]
The vertical conveyor is installed in the vertical space of the hull formed below the bottom wall of the cargo hold. The vertically movable door installed on the bulkhead is lowered to penetrate the bulkhead of the vertical conveyor. By closing the location, the entire space is divided, and the partition wall and the door body cooperate to prevent water from entering the adjacent cargo hold even if it is immersed in a cargo hold.
[0005]
[Problems to be solved by the invention]
The automatic loading and unloading equipment can achieve the purpose of enabling unloading at a pier where the loading and unloading equipment is incomplete.
[0006]
However, the bulkheads and doors adopted as a measure to prevent sinking in the event of a flooding accident are blocked by pressing down the conveyor for vertical transport, so it is extremely difficult to completely seal, allowing gaps or water pressure to be submerged. Not only is there concern, it may not be applicable depending on the structure and type of the conveyor for vertical feeding.
[0007]
On the other hand, in JP-A-5-124575, it is also described that cargo holds are completely cut off from each other by partition walls, and a vertical conveyor and a feed conveyor are installed in each cargo hold. While this can prevent the inundation area from expanding, it requires a conveyor for each cargo hold, and a long collective conveyor that sends bulk material from each conveyor to the landing conveyor on the upper deck. It must be installed, and the automatic cargo handling equipment becomes extremely complicated, so that disadvantages in terms of construction costs, operation, maintenance, etc. are unavoidable.
[0008]
The present invention is a bulk carrier in which a cargo hold is divided into a plurality of front and rear sections by bulkheads, and a vertical conveyor that is part of an automatic cargo handling facility is installed over almost the entire length of the entire cargo hold. Since the space for installing the conveyor for vertical transmission is formed through the hull in the vertical direction, it is difficult to waterproof the bulkhead penetration part and there is a problem in safety, and it cannot be applied depending on the structure and type of automatic cargo handling equipment. In addition, if a vertical conveyor and a vertical conveyor are installed in each cargo hold, the automatic cargo handling equipment becomes extremely complicated, and the disadvantages in terms of construction costs, operation, maintenance, etc. are unavoidable. It is an object of the present invention to solve the above-mentioned problems and to provide a bulk carrier with high safety that can measure the complete waterproofing of the cargo hold without making the automatic cargo handling facility extremely complicated.
[0009]
[Means for Solving the Problems]
The present invention provides a cargo hold in a plurality of spaces which are cut off from each other by bulkheads and formed in a vertical direction of the hull, and a vertical conveyor and an upper conveyor for sending loose materials taken from the bottom of each cargo hold in the vertical direction of the hull. The above problem has been solved by the following in a bulk carrier equipped with an automatic cargo handling facility composed of a conveyor for sending to the upper part of the deck and a conveyor for landing to a predetermined part of the wharf.
[0010]
That is, the vertical conveyor is divided into spaces and installed in the space below the bottom of the cargo hold, and the delivery end of the bulk transport section of each vertical conveyor is the space where each conveyor is located. It is through inlet rose conveying section of the longitudinal feed conveyor is is positioned above the extension chamber which delivery end of the next vertical feed conveyor positioned with being is located inside the extension chamber projecting from the The upper wall portion of the wall body forming the extension chamber is formed with an opening for dropping a loose substance that connects the two adjacent space portions, and a door body that closes the opening in a watertight manner, preferably Has a sliding door that moves linearly to close the opening.
[0011]
Bulk goods in the cargo hold are transferred to the bow side or stern side by sequentially changing the vertical conveyor, and then landed at a predetermined position on the wharf by the transport conveyor and landing conveyor. Since there is only one conveyor for the longitudinal conveyor row and there is no need for a collective conveyor above the upper deck, the automatic handling equipment is not complicated. In addition, the opening for transferring bulk that communicates with the space that is blocked from each other by the bulkhead can be easily closed in a watertight manner with a door, completely preventing inundation from reaching other spaces and cargo holds. It is something that eliminates worry.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Referring to the drawings, an embodiment of the present invention will be described. In FIG. 1, a long hull 2 is formed in the hull 1 from the bow to the stern in the hull longitudinal direction. In the illustrated embodiment, the four partitions 3A, 3B, 3C, 3D are partitioned into five spaces 4A, 4B, 4C, 4D, 4E that are blocked from each other. Of these, cargo holds 5A, 5B, and 5C are provided in three spaces 4A, 4B, and 4C excluding the spaces 4D and 4E at both ends on the stern side and the bow side, respectively.
[0013]
The bottom walls 6A, 6B, and 6C of the cargo holds 5A, 5B, and 5C each have a shape in which flat rectangular hoppers are arranged in a row adjacent to each other in the longitudinal direction of the hull. , 7B, 7C are arbitrarily opened and closed by gates (not shown).
[0014]
Longitudinal conveyors 10A, 10B, and 10C comprising belt conveyors are laid below the outlets 7A, 7B, and 7C below the bottom walls 6A, 6B, and 6C of the spaces 4A, 4B, and 4C. Has been. Further, in the space 4E at the bow side end, there is a feeding conveyor 11 composed of a vertical belt conveyor that conveys a bulk material from a low place to a high place in an enclosed state with two belt conveyors facing each other above the upper deck 8. Further, an unloading conveyor 12 comprising a belt conveyor laid on a pivotable boom is provided above the upper deck 8, and these constitute an automatic cargo handling facility 13.
[0015]
Referring to FIG. 1, FIG. 2, and FIG. 3, at the center of the lower end of each partition wall 3A, 3B, 3C, 3D is a box-shaped projecting into the adjacent space 4D, 4A, 4B, 4C toward the stern. The wall body 14 is attached, and the inside forms extension chambers 15A, 15B, 15C, 15E communicating with the respective spaces 4A, 4B, 4C, 4E.
[0016]
The starting ends of the bulk material conveying sections of the vertical conveyors 10A, 10B, and 10C and the vertical conveyor 11 are located inside the extension chambers 15A, 15B, 15C, and 15E, and the vertical conveyors 10A, 10B, The terminal portion of the bulk material conveyance section of 10C is positioned above the extension chambers 15B, 15C, 15E.
[0017]
And the opening 16 is provided in the upper wall part of the wall body 14 which forms the extension chambers 15B, 15C, and 15E which protruded in the space 4A, 4B, 4C in which the cargo holds 5A, 5B, 5C are provided. A chute 17 surrounding the end portions of the longitudinal conveyors 10A, 10B, and 10C is installed so as to overlap the wall 15 with the lower end communicating with the opening 16.
[0018]
When the outlets 7A, 7B, and 7C are opened, the loose pieces in the cargo holds 5A, 5B, and 5C flow down along the hopper-like inclination of the bottom walls 6A, 6B, and 6B by their own weight, and are conveyed from the outlets 7A, 7B, and 7C. It falls on the belt conveyors 10A, 10B, 10C. The bulk material in the cargo hold 5A on the stern side is discharged into the chute 17 at the sending end which is the end of the conveying section of the transporting conveyor 10A, and passes through the opening 16 as it is at the beginning of the conveying section of the next conveying conveyor 10B. It falls to a certain feed end, passes through the space 4B of the central cargo hold 5B, and transfers to the conveyor belt conveyor 10C on the bow side by the same operation as described above, and further, the feed that is the transport section start end of the feed conveyor 11 Transfer to the inside end of the extension room 15E.
[0019]
The bulk material taken out from the central cargo hold 5B falls to the longitudinal conveying conveyor 10B below and is fed into the feeding conveyor 11 through the conveying conveyor 10C. The bulk material taken out from the cargo hold 5C on the bow side falls to the longitudinal conveyor 10C below it and is sent to the conveyor 11 as it is. Accordingly, by appropriately selecting and opening the outlets 7A, 7B, and 7C, it is possible to continuously convey and land a large amount of loose materials corresponding to the conveying ability of each belt conveyor.
[0020]
The wall body 14, the partition walls 3A, 3B, 3C, 3D and the hull 1 are cut off from each other in cooperation to form water-tight spaces 4A, 4B, 4C, 4D, 4E inside the hull. The openings 16 for dropping and transferring are destroying the watertightness of each other.
[0021]
Therefore, in the illustrated state, a flat door body 20 that linearly moves in the blocking direction and closes the opening 16 is installed at a connection portion between the chute 17 and the opening 16. The door body 20 is driven so that the peripheral edge portion is fitted in the guide groove 18 and the opening 16 is closed by a prime mover 21 including a fluid pressure cylinder. The guide groove 18 is formed so as to protrude outward from the opening 16, and therefore, it is possible to withstand high water pressure by providing a packing that fills a gap with the peripheral edge of the door body 20 fitted therein. It can be a closing means.
[0022]
Therefore, by setting the opening 16 to be opened only at the time of landing of a bulk material and closed otherwise, or to be open at all times and closed at the time of an accident, the hull 1 can be moved by a stranding or a collision. When the ship 2 is damaged and flooded, this flooding remains only in the sections 4A. In addition, even if the damage reaches the wall of one of the cargo holds 5A, 5B, 5C and the cargo hold is directly flooded, it is completely prevented that the unloaded cargo hold is flooded and the sinking is avoided. be able to. In addition, damage to cargo and facilities due to inundation and marine pollution caused by cargo escaping from the damaged part can be reduced.
[0023]
In addition, the automatic cargo handling equipment 13 is not limited to the illustrated form, and the vertical conveyors 10A, 10B, 10C are screw conveyors, and the bulkheads 5A, 5B, 5C are loose at the outlets 7A, 7B, 7C. For example, those provided with a dispensing machine as described in Japanese Patent Laid-Open No. 6-239465, those using a bucket conveyor as a bucket conveyor, etc. The present invention can be applied.
[0024]
Further, the vertical conveyors 10A, 10B, and 10C and the vertical conveyor 11 are not limited to a single line, and the outlets 7A, 7B, and 7C are arranged in the horizontal direction of the hull to convey the falling material from each. However, in either case, the automatic loading / unloading facility 13 may be changed or expanded to such an extent that it does not significantly increase the construction cost, operation, maintenance, etc. preferable.
[0025]
Furthermore, the door body 20 may be configured to rotate to close the opening 16. However, if the door body 20 is configured to be slid as shown in the figure and the peripheral portion is fitted into the guide groove 18, either the upper side or the lower side at the time of flooding. Therefore, there is an advantage that it does not open even when water pressure is applied and is highly reliable.
[0026]
【The invention's effect】
As described above, according to the present invention, in a bulk carrier having an automatic cargo handling facility in which a plurality of cargo holds are arranged in the longitudinal direction of the hull and cut off from each other by bulkheads, the bulk material is taken out from the bottom and landed. Each section, which is blocked by the bulkhead, can be made watertight with the simple means of closing the bulk transfer opening without complicating the equipment, completely preventing flooding from reaching the whole. And can have high safety.
[Brief description of the drawings]
FIG. 1 is a schematic side sectional view showing an embodiment of the present invention.
FIG. 2 is an enlarged partial view of FIG.
3 is a cross-sectional view taken along line XX in FIG.
[Explanation of symbols]
1 hull, 2 hull, 3A, 3B, 3C, 3D bulkhead, 4A, 4B, 4C, 4D, 4E space, 5A, 5B, 5C cargo hold, 7A, 7B, 7C take-out port, 10A, 10B, 10C Conveyor, 11-feed conveyor, 13 automatic cargo handling equipment, 16 openings, 20 doors

Claims (2)

A cargo hold is provided in a plurality of spaces that are cut off from each other by bulkheads and formed in the vertical direction of the hull, and a conveyor for vertical feeding that sends the bulk material taken out from the bottom of each cargo hold in the vertical direction of the hull. In bulk carriers with automatic cargo handling equipment consisting of a hauling conveyor that feeds above the upper deck and a landing conveyor that sends it to a predetermined location on the wharf;
The longitudinal conveyor is divided into the spaces and installed in the space below the bottom of the cargo hold, and the feed conveyor is installed in the space outside the cargo hold on the bow side or the stern side. The bulkhead conveying section of each vertical transport conveyor is positioned within an extension chamber protruding from the space where each conveyor is disposed and the bulk material transport section of the vertical conveyor The feeding end of the next vertical feeding conveyor is positioned above the extension chamber where the feeding end is located, and two adjacent spaces are formed on the upper wall portion of the wall forming the extension chamber. An opening for dropping loose materials in communication with the portion is formed, and a door body is provided for watertightly closing the opening;
This is a bulk carrier.   The bulk carrier according to claim 1, wherein the door body is a slide type that linearly moves to close the opening.

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