JP4332821B2 - Bulk carrier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bulk carrier ship for shipping irregularly shaped solids and powders such as coal, iron ore, and wood chips, and more specifically, a ship has a plurality of cargo compartments formed by partitioning in the front-rear direction. The present invention relates to a bulk carrier equipped with an unloading system mainly composed of a cut-out belt conveyor at the bottom of a ship installed through the bulkhead of each cargo compartment.
[0002]
[Prior art]
The bulk carrier is equipped with an unloading system mainly consisting of a cut-out belt conveyor, and the flooded water is prevented from sinking when the hull is damaged due to grounding or collision. The patent applicant of the present invention has been presented in Japanese Patent Laid-Open No. 5-124576.
[0003]
The bulk carrier disclosed in the above invention is an opening formed with a plurality of bulkheads partitioning a shipboard with an endless cutout conveyor for receiving the bulk material cut from the lower end of each cargo hold and transferring it to the bow or stern. Is provided with a door device that can be closed in a watertight manner with a belt of a cutting conveyor sandwiched between the openings, and the opening of the partition wall is closed with the door device. The inundation of the room is prevented from reaching other cargo compartments.
[0004]
As shown in FIG. 6, this conventional bulk carrier door device 55 includes a first door body 51 positioned above the forward path portion 50a of the belt 50, and the forward path portion 50a and the return path portion 50b. A second door body 52 positioned and a third door body 53 positioned below the return path portion 50b. The first door body 51 and the second door body 52 can be moved up and down. The third door 53 is fixed to the inner surface of the ship bottom 54 in a watertight manner.
[0005]
When closing the door device 55, the lifting device 56 composed of an air cylinder above the first door body 51 is operated to lower the first door body 51 and the second door body 52. 52 and 53, the forward path portion 50a and the backward path portion 50b of the belt 50 are sandwiched in a flat state from above and below in a watertight state, and the other portion partitioned by the partition wall 57 by closing the opening 58 of the partition wall 57 in a watertight manner. It is designed to prevent water from entering the cargo compartment.
[0006]
[Problems to be solved by the invention]
However, for example, like the bulk carrier shown in Japanese Utility Model Publication No. 2-33916, bulk cargo is stored in the cargo compartment as a single cargo hold, and the dispensing machine is automatically driven in the cargo hold to carry the bulk cargo. In the self-unloader ship that is paid out to the cutting conveyor from the slit at the bottom of the warehouse, the cylinder of the lifting device 56 projects above the first door body 51 in the conventional door device 55. In order to increase the height of the upper space, the bottom of the cargo hold must be constructed at the floor height. The floor height of the cargo hold deteriorates the loading efficiency of the cargo and is not suitable for ships with a low cargo hold floor. I couldn't use it.
[0007]
Further, the forward path portion 50a of the cutting conveyor belt 50 is stretched in a trough shape by a trough-type idler 59 installed at a predetermined interval, and the trough-shaped belt is sandwiched between the first and second door bodies 51 and 52. Pushing down and pinching flatly puts not only a strong stress on the pinched belt part, but also the possibility of seal leakage of the packing of the door bodies 51 and 52 due to the repulsive force of the belt. was there.
[0008]
The present invention has been made in view of the above problems, and reduces the size of a door device for watertightly closing an opening of a partition wall with a belt of a cutout conveyor installed through a partition wall of a cargo compartment. At the same time, it is to improve the water tightness of the door device.
[0009]
[Means for Solving the Problems]
The present invention provides a bulk carrier having a door device installed at an opening portion of a partition wall through which a cutting conveyor composed of an endless belt passes, and closing the opening portion in a watertight manner with the belt interposed therebetween. A frame that is watertightly fixed to the opening of the belt, and a revolving door body that is formed in a protruding shape that can be fitted on the upper surface of the trough-shaped outward belt of the belt and that is pivotably attached to the upper side of the outward belt. A trough-shaped intermediate door body positioned so as to be movable up and down between the forward belt and the return belt belt, and a lift door body positioned so as to be movable up and down below the backward belt, A rotating door body is pivoted downward to press-contact the frame body in a watertight manner, and the elevating door body and the intermediate door body rise to sandwich the belt and press-contact to the frame body to open the opening. It is designed to be watertight, and the door above the forward belt The height of the upper installation space can be reduced by using the pivot door, and the forward belt can be pinched while being held in the trough shape to ensure the water-tightness of the belt part and press each door body to the frame. As a result, the water tightness of the entire door device was improved.
[0010]
In addition, a watertight packing is provided on the contact surface of the frame body with each door body and the contact surfaces between the door bodies to ensure watertightness.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.
[0012]
1 to 5 show an embodiment of the present invention. FIG. 1 schematically shows an outline of the bulk carrier of the present invention. In the illustrated embodiment, three cargo compartments 3 are formed. Each cargo compartment 3 is vertically divided into a hopper-like cargo hold 3a having a slit 4 for storing loose goods and discharging the bulk goods loaded on the floor board 5, and a ship bottom 3b which is a space below the floor board 5, In the cargo hold 3a, a dispenser 8 for disposing the loaded bulk material from the slit 4 is installed so as to be able to travel. The ship bottom portion 3b is formed of an endless belt for receiving the bulk material discharged from the slit 4. A delivery conveyor 6 is installed through the opening 7 established in the partition wall 2a of the ship bottom 3b.
[0013]
The bulk material discharged from each cargo hold 3a to the cutting conveyor 6 is transferred to the vertical belt conveyor 10 extending above the stern upper deck 9, and further transferred from the vertical belt conveyor 10 to the landing conveyor 11. It is sent out from the delivery end of the landing conveyor 11 to a predetermined location on the wharf.
[0014]
Further, as shown in FIGS. 2 to 5, the opening 7 of the partition wall 2a of the ship bottom 3b is a door device that is watertightly closed with the forward belt 12a and the return belt 12b of the belt 12 of the cutting conveyor 6 interposed therebetween. 13 is provided.
[0015]
The door device 13 according to the present embodiment is closely fitted to the upper surface of the trough-shaped forward belt 12a of the belt 12 and the frame body 14 fixed in a watertight manner to the opening 7 formed in the partition wall 2a of the ship bottom 3b. An upper surface located between the forward belt 12a and the flat return belt 12b so that it can be raised and lowered is formed in a trough. An intermediate door body 16 having a shape and an elevating door body 17 positioned so as to be movable up and down below the return belt 12 are configured.
[0016]
The forward belt 12a carrying the cargo of the belt 12 extending through the frame 14 is supported in a trough shape by a trough idler 6a in the vicinity of the opening 7 and in the vicinity of the door device 13. 12b is supported in a flat shape by a flat idler 6b.
[0017]
The frame body 14 is for pressure-contacting the doors 15, 16, and 17 when they are closed to enhance the water-tightness. 18 is fixed so as to surround the opening of the frame body 14.
[0018]
The rotating door body 15 is pivotally supported by the upper electric drive device so as to be vertically rotatable along the length direction of the trough-shaped outward belt 12a. As shown in FIG. 3, the door device 13 is opened. In this case, the shaft is fixed in parallel with the upper part of the forward belt 12a, and the height of the upper space of the door device 13 is lowered. Further, a band-shaped watertight packing 19 made of a protective material is fixed to a lower surface formed in a projecting shape that comes into pressure contact with the upper surface of the forward belt 12a when closed.
[0019]
Both ends of the intermediate door body 16 are supported by being sandwiched between the frame body 14 and the apparatus frame 21 so that the intermediate door body 16 can be lifted and lowered. When the intermediate door body 16 is closed, the intermediate door body 16 is pushed up by the lifting door body 17 through the return belt 12b. When opening, it is set to descend to its original position under its own weight.
[0020]
Further, two pairs of wedge-shaped slide shoes 24 having an upward inclined surface project from both ends of the intermediate door body 16 facing the edge of the device frame 21. Further, band-shaped watertight packings 22 and 23 made of a protection material are respectively fixed to the trough-shaped upper surface and the flat lower surface of the intermediate door body 16 that is pressed against the belt 12 when closed.
[0021]
The elevating door body 17 positioned at the lowermost part is sandwiched between the frame body 14 and the apparatus frame 21 at both ends, and is supported by a pair of worm jacks 26 driven by the lower electric drive apparatus 25 so as to be movable up and down. Yes.
[0022]
A pair of wedge-shaped slide shoes 27 having an upward inclined surface similar to that of the intermediate door body 16 project from both end portions of the elevating door body 17 facing the edge of the device frame 21. A band-shaped watertight packing 28 made of a protective material is fixed to the flat upper surface of the elevating door body 17 that contacts the lower surface of the return belt 12b when closed.
[0023]
A known clamping bolt 29 in which a ball is embedded at the tip corresponding to each slide shoe 24, 27 of the intermediate door body 16 and the lift door body 17 is provided at the edge of the apparatus frame 21. As many as 27 slide shoes 24, 27 are projected so as to come into contact with each other.
[0024]
When the door device 13 in the bulk carrier of the present embodiment configured as described above is in an open state for discharging the loaded bulk, as shown in the left half of FIG. 2 and FIG. The moving door body 15 is fixed in a parallel state above the forward belt 12a, and the distance between the rotating door body 15 and the traveling trough-shaped forward belt 12a is maintained at a sufficient distance through which the bulk material can pass. ing.
[0025]
Further, the portion of the forward belt 12a passing through the door device 13 is held in a trough shape with a sufficient depth so that the transported cargo does not spill out by the door device 13 and the trough-type idler 6a in the vicinity of the opening 7. The flat return belt 12 b travels through the gap between the intermediate door body 16 and the lift door body 17.
[0026]
When the door device 13 is closed to prevent the spread of marine inundation, such as during the navigation of a ship, the upper electric drive device 20 is driven to lower the pivot door body 15 by pivoting it. As shown in the half and FIGS. 4 and 5, the watertight packing 18 of the frame body 14 is brought into pressure contact with the vertical position. Further, the lower electric drive unit 25 drives the worm jack 26 to raise the elevating door body 17 to push up the return belt 12 b and push up the intermediate door body 16, with the intermediate door body 16 in the middle and the belt 12 to the three doors. It sandwiches between the bodies 15, 16, and 17, and the respective watertight packings are brought into pressure-tight contact with each other through 19, 22, 23, and 28.
[0027]
Further, the wedge-shaped slide shoes 24 and 27 are brought into sliding contact with the tip of the clamping bolt 29 of the apparatus frame 21 by the raising operation of the intermediate door body 16 and the lift door body 17, and the rising door bodies 16 and 17 are framed by the wedge effect. Fourteen watertight packings 18 are pressed against each other.
[0028]
Accordingly, the door bodies 15, 16, and 17 are closed with the belt 12 sandwiched therebetween in a watertight manner, and are pressed against the frame body 14 in a watertight manner to securely seal the opening 7 of the partition wall 2a.
[0029]
Further, the trough-shaped forward belt 12a is sandwiched between the revolving door body formed in a projecting shape that fits in the trough shape and the intermediate door body formed in the trough shape while being held in the trough shape. Thus, an excessive load is not applied to the belt portion, and water-tight leakage that has been apt to occur in the pressure-contact portions of the water-tight packings 19 and 22 due to the belt stress is prevented.
[0030]
【The invention's effect】
The present invention is implemented in the form as described above, and has the following effects.
[0031]
A door device for preventing inundation is provided at the opening of the bulkhead through which the cutout conveyor of the bulk carrier ships, and the door device is formed into a protruding shape that can be fitted to the trough-shaped forward belt and attached to be pivotable A rotating door body, a trough-shaped intermediate door body that can be raised and lowered, and an elevator door body that can be raised and lowered. When the door is open, the rotating door body is pivoted in parallel with the forward belt and closed. When in a state, each door body is sandwiched between the belts in a water-tight manner and pressed against the frame of the opening in a water-tight manner, so the height of the upper space of the door device should be reduced compared to the conventional door device. Therefore, it is possible to increase the loading efficiency of the cargo hold by building the floor of the cargo hold low. It was also possible to install it on a small bulk carrier where the installation space was low and it was difficult to install a door device for preventing inundation.
[0032]
In addition, when the door device is closed, the trough-shaped forward belt is held while being held in the trough shape, so that the belt is not forced to be locally deformed, and the seal seal leaks due to the repulsive force of the belt. The door device with higher watertightness can be provided.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view showing an outline of a bulk carrier of the present invention.
2 is a front view of the bulk carrier ship of FIG. 1 when the left half is open and the right half is closed. FIG.
3 is a cross-sectional view showing the direction of arrows AA in FIG. 2;
4 is a cross-sectional view showing the direction of arrows BB in FIG. 2;
5 is a cross-sectional view showing the direction of arrow CC in FIG.
FIG. 6 is a front view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Ship, 2 Bulkhead, 2a Bulkhead, 3 Cargo compartment, 3b Ship bottom part, 6 Cutting conveyor, 7 Opening part, 12 Belt, 12a Outward belt, 12b Return belt, 13 Door device, 14 Frame body, 15 Rotating door body , 16 Intermediate door body, 17 Lifting door body, 18 Watertight packing, 19 Watertight packing, 22 Watertight packing, 23 Watertight packing,

Claims (2)

Partitioning the shipboard with partition walls to form a plurality of cargo chambers in the vertical direction of the hull, and installing an extraction conveyor consisting of an endless belt through an opening formed in the partition wall at the bottom of the cargo chamber, and the belt In a bulk carrier having a door device for watertightly closing the opening with the door interposed therebetween, the door device is attached to the upper surface of the trough-shaped forward belt of the belt and the frame body fixed to the opening of the partition wall in a watertight manner. A revolving door body formed in a projecting shape that can be fitted so as to be rotatable above the forward belt, and a trough-shaped intermediate door that is positioned so as to be movable up and down between the forward belt and the return belt And a lifting door body positioned so as to be able to be lifted and lowered below the return belt, and when the door is closed, the pivoting door body pivots downward to press the frame body in a watertight manner, and the lifting door When the body and the intermediate door rise and pinch the belt Rose product carrier which was pressed to the frame body, characterized in that a structure for holding the opening in a watertight manner.   The bulk carrier according to claim 1, wherein a watertight packing is provided on a contact surface of the frame body with each door body and a contact surface between the door bodies.

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