JP4359862B2 - Bulk carrier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bulk carrier for transporting bulk, which is an indeterminate solid cargo, in particular, even if the hull is damaged by grounding or collision, the inundation does not reach the entire ship, and therefore it is feared that it will sink. It is related to a bulk carrier without any.
[0002]
[Prior art]
Conventionally, as shown in FIG. 6 and FIG. 7, a plurality of cargo compartments 21, 22, 23 arranged in the longitudinal direction of the hull are loaded by a plurality of partition walls 71, 72, 73, 74 arranged in the hold 1. In order to unload bulk 3 which is an indefinite solid cargo such as coal, iron ore, wood chips, limestone, grain, etc., it was deployed in cavities 31, 32, 33 formed at the bottom of each cargo compartment 21, 22, 23 A horizontally rotating wheel type dispenser 41, 42, 43 is reciprocated along the discharge grooves 61, 62, 63 formed in the longitudinal direction of the hull in the bottom walls 51, 52, 53 of the cargo chambers 21, 22, 23. Dispensing conveyor for running the bulk 3 loaded in the cargo compartments 21, 22, 23 through the partition walls 71, 72, 73 partitioning the cargo hold 1 into the cargo compartments 21, 22, 23 at the bottom of the ship 8 paying out and this Feed above the upper deck, rose product carrier is known which includes an automatic unloading system for unloading a predetermined portion of the wharf from landing conveyor 9.
[0003]
And in the bulk carrier equipped with such an unloading system, the conveyor passages 75, 76, 77 of the partition walls 71, 72 are closed with a waterproof door, thereby making each cargo compartment 21, 22, 23 watertight. When the ship is damaged by the grounding or collision, the inundation sinks over the entire hull. When the ship is damaged by the grounding or collision, the inundation covers the entire hull. A bulk carrier for preventing this is disclosed in, for example, Japanese Patent Application Laid-Open No. 5-124576.
[0004]
[Problems to be solved by the invention]
However, in the bulk carrier for preventing sinking, the cargo compartments 21, 22, and 23 are independent from each other because the cargo compartments 21, 22, and 23 need to be watertight.
[0005]
Therefore, it is necessary to provide the wheel-type dispensers 41, 42, and 43 for each of the cargo compartments 21, 22, and 23, which increases the equipment cost. In addition, for example, in order to adjust the payout amount and balance the ship, it is necessary to operate each of the payers 41, 42, and 43 in relation to each other at the time of cargo handling. There are problems such as being complicated.
[0006]
The present invention has been made in order to solve the above-described problems. In a bulk carrier, which prevents flooding from sinking over the entire hull when the ship is damaged by grounding or a collision, As described above, it is not necessary to provide each of the cargo compartments 21, 22, and 23 with a wheel-type dispenser 41, 42, and 43. Therefore, it is intended to save equipment costs and operating funds and to promote efficiency of cargo handling fraud. It is.
[0007]
[Means for Solving the Problems]
In the present invention, a plurality of cargo compartments formed by partitioning the hold with partition walls are arranged in the longitudinal direction of the hull, and are rotatable along discharge grooves formed in the longitudinal direction of the hull on the bottom wall of each cargo compartment. And a dispensing device for dropping the bulk material accommodated in the cargo compartment by reciprocating through the respective partition walls and dropping onto the dispensing conveyor installed at the bottom of the ship through the partition walls, and through the conveyors of the partition walls during voyage In a bulk carrier equipped with a sinking prevention device that closes the place including the belt of the delivery conveyor, a dispenser passage port through which the dispenser can pass is formed in the bulkhead that partitions the hold and forms a cargo compartment. In addition, a watertight door that moves up and down via a ball screw is provided at each dispenser passage.
[0008]
Further, in the above means, by providing a pressing device that applies a pressing force in the direction of the partition wall to the watertight door, it is possible to reliably close the dispenser passage port in a watertight state, and to drive the watertight door up and down. By using a variable speed electric motor as a source, the time required for raising and lowering the watertight door can be shortened, and by using a variable torque motor as a driving source of the pressing device, a watertight state can be reliably ensured. Can be formed.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. The same components as those in the conventional example will be described with the same reference numerals.
[0010]
1 to 5 show one of the preferred embodiments of the present invention, in which a hold 1 is partitioned by partition walls 71, 72, 73, 74, and coal, iron ore, wood chips, limestone, grains, etc. Freight chambers 21, 22, and 23 for loading bulk 3, which is an undefined solid cargo, are formed in each cargo chamber 21, 22, and 23 by a mountain-shaped roof member 311, 321, 331. Between these, voids 31, 32, and 33 are formed.
[0011]
In particular, in this embodiment, the dispensing machine 4 can reciprocate between the cavities 31, 32, 33 in the longitudinal direction of the hull in the partition walls 72, 73 partitioning the cargo compartments 21, 22, 23. Convex dispenser passage ports 721 and 731 are respectively formed.
[0012]
That is, the pair of traveling rails 40 and 40 supported by the mountain-shaped roof members 311, 321, 331 forming the cavities 31, 32, 33 in the cargo compartments 21, 22, 23 are the discharger passage port 721, respectively. 731 is disposed between the cavities 31, 32, and 33. Along the travel rails 40, 40, a rotary dispenser 4 having a single horizontally rotating wheel is disposed so as to be able to reciprocate through the dispenser passage ports 721, 731. The delivery conveyor 8 for receiving the bulk material 3 delivered from the discharge grooves 61, 62, 63 formed in the bottom walls 51, 52, 53 and sending it to the upper deck is provided with partition walls 71, 72. , 73 is provided. Further, a landing conveyor 9 is provided for unloading the bulk material 3 to a predetermined location on the wharf.
[0013]
Furthermore, the bottoms of the bulkheads 71, 72, 73 close the through portions 75, 76, 77 of the discharge conveyor 8 including the discharge conveyor 8, for example, a watertight door disclosed in Japanese Patent Laid-Open No. 5-124576. Such a sinking prevention device is provided.
[0014]
Further, another bulkhead 723, 733 having a dispenser passage port 722, 732 has a predetermined interval at the lower part of the side face of the bulkhead 72 on the cargo compartment 21 side and the bulkhead 73 side of the bulkhead 73. Also, the dispenser passage ports 722 and 732 are arranged in communication with the dispenser passage ports 721 and 731, respectively, and the dispenser passage ports 721 and 721 are arranged in gaps formed between the partition walls 72 and 723 and the partition walls 73 and 733. A gate-shaped watertight frame 10 having a height approximately twice as high as 731 is provided in close contact with the partition wall 72 or the partition wall 73 through the watertight door frame 100.
[0015]
In addition, a watertight seal 11 having a P-shaped cross section formed of watertight rubber is attached along the opening edge around the watertight door frame 100 provided at the dispenser passage ports 721 and 731. A watertight door 12 that moves up and down is provided.
[0016]
The watertight door 12 is a pair of screw screw shafts 14 that are arranged at both ends of a drive screw shaft 14 that is rotated by a variable speed motor 13 such as a Bayer motor provided along a horizontal frame 101 above the watertight frame 10. It is suspended from the ball screws 15 and 15 and is moved up and down by rotating the electric motor 13 forward or backward to open and close the dispenser passage 721 (731).
[0017]
In addition, the watertight door 12 is provided with a pressing device 17 composed of four sets of left and right worm jacks 171 using torque-variable electric motors 16 and 16 as drive sources.
[0018]
In the present embodiment configured as described above, during the voyage, a sinking prevention device comprising a watertight door provided at the through-holes 75, 76, 77 of the delivery conveyor 8 at the bottom of the partition walls 71, 72, 73 is used. The cargo compartments 21, 22, and 23 are independent from each other by closing and closing the watertight doors 12 to close the dispenser passage ports 721, 731 formed in the partition walls 72, 73 (as shown in FIG. 2). Form a watertight state. Therefore, when the ship is damaged to the hull by grounding or collision, Ru can be prevented that the flooding is sinking span the entire hull.
[0019]
In particular, in the present embodiment, a watertight seal 11 having a P-shaped cross section formed of watertight rubber is formed along the opening edge around the watertight frame 10 side of the dispenser passage ports 721 and 731 in the partition walls 72 and 73. In addition, each watertight door 12 that closes the dispenser passage ports 721 and 731 is provided with a pressing device 17 including four worm jacks using a torque variable type electric motor 16 as a drive source. Therefore, by adjusting the pressing force of each pressing device 17 and pressing it against each watertight door 12 dispenser passage port 721, 731 with an appropriate pressing force, a watertight state can be surely formed, or excessive pressing force can be formed. It is possible to prevent the watertight seal 11 from being deteriorated or damaged.
[0020]
After arriving at the destination port, the sinking prevention device that closes the through portions 712, 722, 732 of the delivery conveyor 8 at the ship bottom of the partition walls 71, 72, 73 is released, and at the ship bottom of the partition walls 71, 72, 73 While releasing the penetration locations 712, 722, 732 of the discharge conveyor 8, the pressing device 17 consisting of eight worm jacks 171 is reversed to release the pressing force of the watertight door 12 to the discharger passage ports 721, 731, The watertight door 12 is raised to expose the dispenser passage ports 721 and 731 (state shown in FIG. 5).
[0021]
Then, the rotary dispenser 4 is continuously reciprocated between the cavities 31, 32, 33 along the traveling rails 40, 40 by passing the dispenser passage ports 721, 722, 731, 732, The bulk material 3 accommodated in each cargo compartment 21, 22, 23 is arranged at the bottom of the ship from the discharge grooves 61, 62, 63 formed in the bottom walls 51, 52, 53 of each cargo compartment 21, 22, 23. The material is discharged onto the discharge conveyor 8 and sent above the upper deck, and is automatically unloaded at a predetermined position on the wharf by the landing conveyor 9.
[0022]
Thus, according to the present embodiment, during voyage, it is possible to partition each cargo compartment 21, 22, 23 in a completely watertight state, and when the ship is damaged to the hull by grounding or collision, It is possible to prevent the water from sinking over the entire hold 1.
[0023]
Further, at the time of unloading, it is not necessary to provide a wheel type dispenser 4 for each of the cargo compartments 21, 22, 23, and a single dispenser 4 is reciprocated through each cargo compartment 21, 22, 23 for delivery. Therefore, it is possible to save equipment costs and working capital and promote efficiency of cargo handling fraud.
[0024]
In particular, since the dispenser passage ports 721 and 731 formed in the partition walls 72 and 73 are opened and closed by raising and lowering the watertight door 12 by a pair of ball screws 15 and 15, for example, a hinge type or a rotary type Compared to the case of using a watertight door, it has the advantage that it can be deployed in a very small space.
[0025]
Further, since the raising and lowering and pressing of the watertight door 12 are driven by the electric motors 13 and 16, automation by remote operation is easy. In particular, the electric motor 13 for raising and lowering the watertight door 12 is a variable rotation speed type. In addition, it is possible to reduce the ascending / descending time by operating the beginning or end of the ascending / descending operation slowly to stop it at an accurate position and increasing the operation speed during the operation.
[0026]
In this embodiment, Japanese Patent Laid-Open No. 5-124576 is disclosed as a sinking prevention device comprising a watertight door provided at the through-holes 75, 76, 77 of the delivery conveyor 8 in the bottom of the partition walls 71, 72, 73. However, it is needless to say that the present invention can be implemented using other anti-sink devices.
[0027]
【The invention's effect】
As described above, according to the present invention, it is possible to achieve watertightness in a state where each cargo compartment is independent, and when the ship is damaged by the grounding or a collision during the voyage, the inundation is performed on the entire hull. Will not sink. In addition, since it is only necessary to provide one common wheel-type dispenser that runs through each cargo compartment, there is no increase in equipment costs, and it is extremely easy to adjust the amount to be dispensed during handling and the balance of the ship. Easy.
[0028]
Moreover, by providing a pressing device that applies a pressing force to the watertight door in the direction of the partition wall, the dispenser passage can be reliably closed in a watertight state, and a speed variable type as a drive source for raising and lowering the watertight door. By using the electric motor, the time required for raising and lowering the watertight door can be shortened and the watertight door can be stopped at an accurate position.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view schematically showing a preferred embodiment of a bulk carrier of the present invention.
FIG. 2 is an enlarged cross-sectional view taken along line AA in FIG.
FIG. 3 is a plan view of FIG. 2;
4 is a side view of FIG. 2. FIG.
5 is an enlarged cross-sectional view taken along line AA in a different state of FIG.
FIG. 6 is a longitudinal sectional view schematically showing a conventional example.
7 is an enlarged sectional view taken along line BB in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Ship hold, 3 bulk goods, 4 delivery machine, 8 delivery conveyor, 12 watertight door, 13 electric motor, 16 electric motor, 17 pressing device, 21, 22, 23 cargo compartment, 51, 52, 53 bottom wall, 61, 62, 63 Discharge groove, 71, 72, 73, 74 Bulkhead, 721, 731 Dispenser outlet.

Claims (4)

  A plurality of cargo compartments formed by partitioning the hold with bulkheads are arranged side by side in the longitudinal direction of the hull, and a rotary dispenser is disposed along a discharge groove formed in the longitudinal direction of the hull on the bottom wall of each cargo compartment. The apparatus includes a discharging device that reciprocates and drops the bulk material stored in the cargo compartment onto the discharging conveyor that passes through the partition walls and is installed on the bottom of the ship. In the bulk carrier ship equipped with a sinking prevention device including the belt, the discharger passage through which the discharger can pass is formed in the partition that partitions the hold and forms the cargo compartment. The bulk carrier is provided with a watertight door that is moved up and down via a ball screw at each dispenser passage.   The bulk carrier according to claim 1, wherein a pressing device that applies a pressing force to the watertight door in the direction of the partition wall is provided.   The bulk carrier according to claim 1 or 2, wherein a speed-variable electric motor is used as a drive source for raising and lowering the watertight door. 3. A bulk carrier according to claim 2, wherein a torque variable electric motor is used as a driving source of the pressing device.

Images