JP4560752B2 - Waterproof door device for bulk carrier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bulk carrier ship that transports bulk, which is an irregularly shaped solid cargo such as coal, iron ore, wood chips, limestone, and grain, to the sea, and more specifically, a plurality of ships arranged in the longitudinal direction of the hull partitioned by bulkheads The present invention relates to a waterproof door device for a bulk carrier having an unloading system including a cargo conveyor and a cutting conveyor formed of a belt conveyor that penetrates a partition wall and is installed on a ship bottom.
[0002]
[Prior art]
In order to unload the bulk material loaded in the cargo compartments arranged in the longitudinal direction of the hull of the hold, a cut-out conveyor installed at the bottom of the cargo through the bulkhead partitioning the cargo compartment, and the bottom of the cargo compartment Distributor to deploy and discharge the bulk material to the cutting conveyor, vertical conveyor installed at the bow or stern to send the bulk material of the cutting conveyor above the upper deck, and vertical on the upper deck It is well known to provide a bulk carrier with an unloading system having a landing conveyor that sends the bulk of the conveyor to a predetermined location on the pier.
[0003]
And when a bulk carrier equipped with such an unloading system is damaged by grounding or a collision, the cutout conveyor penetration part of the bulkhead is set so that the inundation does not sink over the entire hull. It is conceivable to provide a waterproof door device that closes and seals the cargo compartment water tightly, and is disclosed in, for example, Japanese Patent Application Laid-Open No. 5-124576.
[0004]
As shown in FIG. 5, the waterproof door device presented in the above publication includes a first door 81 positioned above the forward belt portion 80a of the cutting conveyor 80, an outward belt portion 80a, and a return belt portion 80b. A second door body 82 positioned between the first door body 81 and the second door body 82, and a third door body 83 positioned below the return belt portion 80b. A third door body 83 is watertightly fixed on the ship bottom 84, and an elevating device 85 composed of a fluid pressure cylinder is installed above the first door body 81.
[0005]
Then, the lifting device 85 is operated to lower the first door body 81 and the second door body 82 according to the guide grooves 88 provided on both sides of the opening 87 of the partition wall 86, and each door body 81, 82, 83 moves forward. The opening 87 is closed in a state where the belt portion 80a and the return belt portion 80b are sandwiched from above and below in a flat state.
[0006]
[Problems to be solved by the invention]
However, since the rubber material which coats the surface of the normally used conveyor belt has durability, the conveyor belt is suitably hard and has a core material such as a steel cord in order to give it strength, so about 10 to 20 mm. It has the thickness of.
[0007]
Therefore, when the opening 87 is closed by the door bodies 81, 82, 83, as shown in FIG. 6, the return belt portion sandwiched between the second door body 82 and the third door body 83 via the seals 83a and 82b. A gap 89 is easily formed at both side ends of the forward belt portion 80a sandwiched between the first door body 81 and the second door body 82 via the seals 82a and 81a, and water tightness is poor. It was.
[0008]
Therefore, conventionally, when the opening 87 is closed by the door bodies 81, 82, 83, a separate work such as manually filling the gaps 89 with a sealing material is necessary. It was cumbersome and time-consuming.
[0009]
The present invention has been made in view of such a situation, and when the opening is closed by the door body, the gap formed at both side ends of the belt portion sandwiched between the door bodies can be automatically closed. It is an object to provide a bulk carrier with a possible waterproof door device.
[0010]
[Means for Solving the Problems]
The present invention provides a cutting conveyor comprising a belt conveyor in which a plurality of cargo compartments partitioned by bulkheads are arranged side by side in the longitudinal direction of the hull, and the bulk material discharged from the bottom of the cargo compartment is sent to the bow or stern. A plurality of doors that are installed through the opening provided in the partition wall and sandwich the forward belt part and the return belt part of the cutting conveyor between guide frame bodies arranged along both side opening edges of the opening. Is arranged, and the doors are closed by lifting and lowering all or at least one of the plurality of doors to close the opening while sandwiching the forward belt portion and the backward belt portion. The above-mentioned problem is solved as follows.
[0011]
That is, a pair of slide seals can be moved along the sandwiching surfaces at both end portions of the sandwiching surface of one door body that can be raised and lowered among the door members that are disposed across the forward belt portion and the return belt portion. with are respectively arranged, sometimes each slide seal said opening is open elastic body the slide seal arranged in the door body located is energized is coupled inwardly to its inner end, Further, the outer ends of the respective slide seals are connected in a tensioned state to the predetermined length of the ropes, one end of which is fixed to the guide frame body, and the respective slide seals are arranged at both end portions of the forward belt portion or the backward belt portion. When the door body on which the slide seal is arranged is closed to close the opening, the rope is loosened and the slides are The ride seal was moved inward by the urging force of the elastic body and was brought into close contact with both ends of the forward belt portion and the backward belt portion.
[0012]
Then, when each door body is raised and lowered to open the opening, tension is applied to the rope again by the raising or lowering of the door body, and the slide seal returns to its original position against the urging force of the elastic body.
[0013]
As described above, the both ends of the forward belt portion and the backward belt portion are automatically closed with the slide seal in conjunction with the raising / lowering operation of the door body, so that a watertight state can be easily and reliably formed.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 4 show an outline of a bulk carrier to which the present invention is applied. In the illustrated embodiment, a plurality of the cargo holds 2 inside the hull 1 are partitioned by bulkheads 3 and arranged in the longitudinal direction of the hull. Three cargo compartments 4 are provided. Each cargo chamber 4 is formed in a hopper shape, and a slit-shaped exit 6 is provided in a flat floor plate 5 at the bottom thereof, and a dispenser 7 that reciprocates along the upper surface of the floor plate 5 is provided. . Further, below the floor plate 5, a cutting conveyor 9 made of a belt conveyor is installed through the partition wall 3.
[0015]
The bulk material in the cargo compartment 4 is discharged from the exit 6 by the dispenser 7, is sent to the stern on the cutout conveyor 9, and is transferred to the landing conveyor 12 through the vertical conveyor 11 extending above the upper deck 10. , Landed at a predetermined place on the wharf.
[0016]
The waterproof door device 14 according to the present invention represented by the embodiment described in detail below is installed in each of all the openings 13 of all the partition walls 3 through which the cutting conveyor 9 passes.
[0017]
2 and 3, the waterproof door device 14 is installed above the frame 15 that surrounds the opening 13 and is water-tightly attached and fixed to one side of the partition wall 3, and the forward belt portion 9 a of the cutting conveyor 9. The first door body 16, the second door body 17 installed between the forward belt portion 9a and the return belt portion 9b, and the third door body 18 installed below the backward belt portion 9b. .
[0018]
The frame 15 is fixed to the front of the left and right vertical frame portions 15a and 15a while a packing 19 made of an elastic sealing material and surrounding the opening 13 is fixed to the front surface where each door body 16, 17, and 18 is in contact. Thus, the flat guide frame body 20 is projected.
[0019]
The first door body 16 has a trapezoidal protrusion 16a that matches the trough shape of the forward belt section 9a and a support shaft 16b that protrudes at both ends. The bearings 21 and 21 installed between the frame portion 15 a and the guide frame body 20 are rotatably supported by the support shaft 16 b, and one end of the support shaft 16 b is provided with a speed reducer 23 a constituting the rotation drive mechanism 23. Then, it is coupled to an electric motor which is a prime mover 23b. The first door body 16 is rotated between a substantially horizontal standby position and a vertically closed position close to the packing 19, and the packing 24 is fixed to an end surface directed downward when the first door body 16 is directed downward. Has been.
[0020]
The second door body 17 has a trapezoidal recessed portion 17a that matches the trough shape of the outward belt portion 9a. The second door body 17 is supported by the guide frame body 20 and has a standby position and a closed position in contact with the outward belt portion 9a. It can be moved up and down. Further, packings 25 and 26 are fixed to the upper and lower end faces of the second door body 17.
[0021]
A packing 27 is fixed to the upper end surface of the third door body 18, and both left and right end portions are supported by the guide frame body 20 so as to be movable up and down.
[0022]
The elevating drive mechanism 28 for elevating and lowering the third door body 18 includes elevators 30 and 30 composed of two left and right worm jacks attached to a base 29 installed therebelow, and one end of a transmission shaft 31 that simultaneously drives them. The motor 32 and the speed reducer 33, which are combined prime movers, are configured.
[0023]
Further, the left and right side end portions of the second door body 17 that moves up and down in the first door body 16 and the second door body 17 that are arranged vertically with the forward belt section 9a interposed therebetween, and the return belt section 9b interposed therebetween. The left and right end portions of the third door body 18 that moves up and down in the second door body 17 and the third door body 18 arranged above and below have substantially the same thickness as the forward belt portion 9a and the return belt portion 9b. A pair of slide seals 33, 33 are respectively arranged so as to be movable in the left-right direction along the sandwiching surface.
[0024]
Further, the inner ends of the slide seals 33, 33 are connected to the elastic bodies 34, 34 made of tension springs arranged on the second door body 17 or the third door body 18 on which the slide seals 33 are arranged. The outer ends of the slide seals 33, 33 are urged in the direction, and the strips 36, 36 are formed of wire ropes of predetermined lengths, one end of which is fixed to the reels 35, 35 respectively provided in the guide frame body 20. Are connected in a tension state, and the slide seals 33 and 33 are in a standby state at a predetermined position in the outward direction from both side end portions of the forward belt portion 9a.
[0025]
In a standby position (see FIG. 1) in which the second door body 17 is horizontal and extends along the lower surface of the floor plate 5 of the cargo compartment 4 and the third door body 18 is lowered by the elevators 30 and 30, the cutting conveyor 9 The forward belt portion 9a travels without contacting the first door body 16 and conveys the bulk material 91 discharged from the cargo compartment 4 (see FIG. 1).
[0026]
When the opening 13 is closed, first, the first door body 16 in the horizontal state is rotated by the rotation drive mechanism 23 so as to face vertically downward, and the upper end portion of the surface facing the packing 19 of the frame body 15 and The left and right ends are pressed together in a watertight manner. At this time, the downward end surface is slightly separated from the forward belt portion 9a.
[0027]
Next, when the third door 18 is lifted by the lifting drive mechanism 28, the flat linear upper end surface comes into contact with the lower surface of the return belt portion 9b and pushes it up, and then the upper surface of the return belt portion 9b is second. Touch the flat linear lower end surface of the door body 17 and push it up. Further, the upper end surface of the second door body 17 touches the lower surface of the forward belt portion 9 a and pushes it up to contact the lower end surface of the first door body 16. (See FIG. 4).
[0028]
The return belt portion 9b is slightly lifted upward while maintaining a flat shape, and the outward belt portion 9a is slightly lifted upward while maintaining a trough shape, and is in close contact with each other to be watertight. As a result, it is possible to obtain water tightness during navigation without causing deformation of the forward belt portion 9a of the cutting conveyor 9 or deterioration of the belt.
[0029]
In particular, in the present embodiment, when the second door body 17 and the third door body 18 are raised to close the opening 13, they are arranged on the second door body 17 and the third door body 18 , respectively. The strips 36, 36 connected to the outside of the slide seals 33, 33 are slackened and moved inward by the urging force of the elastic bodies 34, 34, and both sides of the forward belt portion 9a and the return belt portion 9b. They are in close contact with the ends (see FIG. 4).
[0030]
Therefore, unlike the conventional case, the outer belt portion 9a sandwiched between the first door body 16 and the second door body 17 and the return belt portion 9b sandwiched between the second door body 17 and the third door body 18 are formed on both side ends. Since the gap to be formed is reliably closed by the slide seals 33, 33, extremely excellent water tightness can be ensured.
[0031]
In order to release the watertight state and open the opening 13, when the third door body 18 is lowered by the elevating drive mechanism 28, the second door body 17 is lowered by its own weight, and then the second drive body 23 is moved by the rotation drive mechanism 23. The one door body 16 may be set in a horizontal state, and at this time, the ropes 36 connected to the outer ends of the slide seals 33 resist the urging force of the elastic bodies 34 connected to the inner ends. A tension state is formed and each slide seal 33 is pulled outward to return to the original position shown in FIG. 2 and FIG. 3, so that the cutting operation can be performed without contacting the forward belt portion 9a and the return belt portion 9b. Can do.
[0032]
In particular, since each slide seal 33 slides in conjunction with the raising and lowering of the second door body 17 and the third door body 18, no special drive mechanism or control mechanism is required separately, which is extremely economical. .
[0033]
【The invention's effect】
As described above, according to the present invention, the opening which is a partition penetration portion of the cutting conveyor can be installed without requiring a large space and without forcibly deforming or pulling the belt to hinder the unloading operation. Both ends of the belt in the belt conveyor can be securely sealed with a slide seal to seal and close the water, and the slide seal slides in conjunction with the raising and lowering of each door body, so there is a special drive mechanism and control separately. It does not require a mechanism and is extremely economical.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view schematically showing an example of a bulk carrier to which the present invention is applied.
FIG. 2 is a front view of the waterproof door device according to the embodiment of the present invention when opened.
FIG. 3 is a plan view of FIG. 2;
4 is a front view of the embodiment shown in FIG. 2 when closed. FIG.
FIG. 5 is a front view at the time of release showing a conventional example.
6 is a front view of the conventional example shown in FIG. 5 when closed.
[Explanation of symbols]
3 Bulkhead, 4 Cargo compartment, 9 Cutting conveyor, 9a Outward belt, 9b Return belt, 13 Opening, 14 Waterproof door device, 16 First door, 17 Second door, 18 Third door, 20 Guide Frame, 33 Slide seal, 34 Elastic body, 35 Strip

Claims (1)

A plurality of cargo compartments partitioned by bulkheads are arranged side by side in the longitudinal direction of the hull, and a cutout conveyor comprising a belt conveyor for sending loose matter discharged from the bottom of the cargo compartment to the bow or stern is provided in the bulkhead. A plurality of door bodies sandwiching the forward belt portion and the return belt portion of the cutting conveyor are disposed between the guide frames disposed along the opening edges on both sides of the opening. A waterproof door device for a bulk carrier that closes each of the plurality of doors by lifting or lowering all or at least one to close the opening while sandwiching the forward belt portion and the return belt portion,
A pair of slide seals are arranged so as to be movable along the sandwiching surfaces at both end portions of the sandwiching surface of one door body that can be raised and lowered among the door bodies that are disposed across the forward belt portion and the return belt portion. together they are, sometimes each slide seal said opening is open elastic body the slide seal arranged in the door body located is energized is coupled inwardly to its inner end, and wherein A cord having a predetermined length with one end fixed to the guide frame body is connected to the outer end of each slide seal in a tension state, and each slide seal is more than both side end portions of the forward belt portion or the return belt portion. When the door body in which the slide seal is arranged to close the opening is held at a predetermined position in the outside direction, the rope is loosened and the slides are moved. It rose product carrier waterproof door apparatus Lumpur, characterized in that the close contact respectively at both side ends of the forward belt unit and return belt portion moves inward by the biasing force of the elastic body.

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