JP4352358B2 - Waterproof door device for bulk carriers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bulk carrier ship that transports bulk, which is an irregular solid cargo such as coal, iron ore, wood chip, limestone, and grain, to the sea, and more specifically, a plurality of bulk carriers partitioned by bulkheads and arranged in the longitudinal direction of the hull. The present invention relates to a waterproof door device installed in a bulk carrier having an unloading system having a cargo compartment and including a cutting conveyor formed of a belt conveyor that penetrates a partition wall and is installed at the bottom of a ship.
[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 cargo hold, the excavation 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 widely known to provide a bulk carrier with an unloading system having a landing conveyor that delivers the bulk of the conveyor to a predetermined location on the wharf.
[0003]
Then, when a bulk carrier equipped with such an unloading system is damaged by the grounding or collision, the cargo compartments are watertight to each other so that the inundation does not sink over the entire hull. For example, it is considered that a waterproof door is provided at a partitioning-penetrating portion of the partition wall, and an example thereof is disclosed in JP-A-5-124576.
[0004]
As shown in FIG. 7, the waterproof door device described in the above publication includes a first door 61 installed above the forward belt portion 60 _a of the cutting conveyor 60, an outward belt portion 60 _a, and a return belt portion 60. a second door member 62 installed between the is _b, comprises a third door body 63 is placed under the return belt portion 60 _b, a first door member 61 and the second door 62 first door member The third door body 63 is fixed on the ship bottom 64 and can be moved up and down by a lifting device 65 composed of a fluid pressure cylinder coupled to 61.
[0005]
The three door bodies 61, 62, and 63 are retracted at positions spaced apart from each other so as not to hinder the running of the cutting conveyor 60 and the conveyance of loose materials in the open state. Then, the first door body 61 and the second door body 62 are lowered, and the forward belt portion 60 _a and the return belt portion 60 _b are sandwiched between the mating surfaces of the door bodies 61, 62, 63, thereby The door 67 is closed.
[0006]
Further, in the closed state, the right and left side edges of the first door body 61 and the second door body 62 are formed in guide grooves 68 provided on both sides of the opening 67 in order to make the cargo compartments on both sides of the partition wall 66 watertight. Packing 61, which is an elastic seal material, is used as a sealing means on each of the lower end surface of the first door body 61 and the upper end surface of the second door body 62, which are fitted in _a watertight manner and form a mating surface sandwiching the forward belt portion 60a. _a, 62 provided with a _a, similar packing 62 _b as a sealing means on each of the lower end surface and the upper end face of the third door element 63 of the second door 62 to form a mating surface to sandwich the return belt portion 60 _b, It is provided with a 63 _a.
[0007]
As described above, the upper opening 67 a cutting conveyor through point of the partition wall 66 by the forward belt portion 60 _a and the return belt portion 60 _b, in, is divided into three lower, even waterproof doors Therefore The three door bodies 61, 62, and 63 are divided and moved at least two of them to open and close the door. As shown in FIG. 8, packings 61 _a , 62 _a , 62 _b , and 63 _a are provided so as not to create a gap in the mating surfaces of the door bodies 61, 62, and 63 even when they are stacked vertically in the closed state. A cross-sectional shape is used.
[0008]
[Problems to be solved by the invention]
The packing 71 shown in FIG. 8 (A) is provided with a sealing portion 73 having a semi-circular cross-section with a semicircular top surface provided at one end of a flat mounting substrate portion 72 that overlaps the end surface of the door body. It is called a type. Further, the packing 75 shown in FIG. 5B is called a convex shape in which a sealing portion 77 having a rectangular cross section is provided in the center of a flat mounting substrate portion 76 that is superimposed on the end face of the door body. Is. These are generally used in areas where watertightness is required, such as doors and gates in a wide range of fields, and usually have a hardness of about H _s 65 to 75 and are highly durable and ensure watertightness when closed. Made of rubber-based material with excellent reproducibility.
[0009]
When the generally used P-type packing 71 or convex-type packing 75 is used as a sealing means for the mating surfaces of the waterproof doors 61, 62, 63 of the bulk carrier, the cutting conveyor In the case of the P-type packing 71 on both sides of the belt 60, the semicircular top surface of the sealing portion 73 is in contact, and in the case of the convex packing 75, the flat top surface of the sealing portion 77 is in contact with and slightly compressed. It sticks in the state where it is.
[0010]
However, since the P-type packing 71 has a semicircular top surface, there is a problem in that the contact area to the belt, that is, the seal area is extremely small and the reliability with respect to water tightness is lacking. Further, since the sealing portion 77 of the convex packing 75 has the same width from the base end to the top surface, the sealing surface formed by the top surface has a large shape but is difficult to be compressed, and thus is not reliable for watertightness. There is a problem. Furthermore, it is inevitable that the belt of the cutting conveyor 60 is worn and thinned over time as the bulk material is conveyed. For this reason, in the case of a system in which the door closing positions of the door bodies 61, 62, 63 provided with the packings 71, 75 having the hardness as described above are set by stroke control, a compression amount capable of following the wear is given. In addition, it is difficult to set the door closing position, and it is inevitable that the watertightness gradually decreases with wear.
[0011]
The present invention overlaps each other by moving at least two of the upper, middle, and lower three door bodies, and sandwiches the forward belt portion and the return belt portion of the cutting conveyor between the mating surfaces thereof, thereby opening the partition wall. The above-mentioned waterproof door device that measures the water tightness of the cargo compartment is included, the reliability of the water tightness of the mating surfaces of each door body is lacking in reliability, and the water tightness decreases with wear of the belt In order to solve this problem, it has sealing means using a packing having a particularly high compressibility as well as durability and reproducibility, and has an end face that forms the mating surface of the door body. The purpose is to provide a bulk carrier with a highly reliable waterproof door device.
[0012]
[Means for Solving the Problems]
In the present invention, 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 materials discharged from the bottom of the cargo compartment to the bow or stern is used as the bulkhead. A waterproof door device for closing an opening in a bulk carrier that is installed through an opening provided, the first door body installed above the forward belt portion of the cutting conveyor, and the cutting conveyor Provided with a second door installed between the forward belt section and the return belt section and a third door installed below the return belt section, and these three door bodies are separated from each other in the open state. For waterproof door devices that allow the transfer of loose materials by the exit conveyor and overlap each other in the closed state with the forward belt portion and the backward belt portion sandwiched between the respective mating surfaces, and in close contact with each other. Means like It was decided to solve the problem by Succoth.
[0013]
That is, the packing used for the sealing means for each mating surface includes a mounting substrate portion, a rectangular base portion having a rectangular cross section protruding therefrom, and a trapezoidal trapezoidal trapezoidal top portion, and a sealing portion having a top surface of the trapezoidal top portion as a sealing surface. It is assumed that the mounting substrate portion is overlapped and fixed to the end faces facing each other when the doors are in the closed state.
[0014]
In this way, by forming the rail surface of the sealing portion that is in close contact with the belt by the top surface of the trapezoidal top portion that is narrower than the base portion, a packing having a moderate seal area and a large compression amount is obtained, The objective of giving high confidence in water tightness is achieved.
In addition, the mounting board part is compressed and fixed to the end face of the door body in a compressed state by a pressing member bolted to the door body, and in this case, the ridge is crushed by using a protrusion provided on the mounting board part. In order to achieve the object of the present invention, it is preferable to overlap the end surface of the door body with the rubber body material having a hardness of H _s 45 to 55.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
The embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an outline of a bulk carrier to which the present invention is applied, in which a hold 2 inside a hull 1 is partitioned by a bulkhead 3. A plurality of cargo chambers 4 arranged in the longitudinal direction of the hull, in the illustrated form, 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.
[0017]
Bulk material in the cargo compartment 4 is discharged from the exit 6 by the dispenser 7 and is transferred to the landing conveyor 12 via the vertical conveyor 11 which is sent to the stern on the cutting conveyor 9 and extends above the upper deck 10. And landed at a predetermined location on the wharf.
[0018]
The waterproof door device 15 according to the present invention represented by the embodiment described in detail below is provided in each of all the openings 13 of all the bulkheads 3 through which the cutting conveyor 9 in the above-described commonly known bulk carrier ships. Is installed.
[0019]
The waterproof door apparatus 15 with reference to FIG. 2, a frame 16 which is mounted fixed in a watertight on one side of the partition wall 3 surrounding the opening 13 was placed above the reciprocating belt portion 9 _a of the cut-out conveyor 9 includes a first door member 19, a second door member 25 which is installed between the forward belt unit 9 _a and backward belt portion 9 _b, and a third door body 31 is placed under the return belt portion 9 _b ing.
[0020]
The frame body 16 has a packing 17 made of an elastic sealing material disposed so as to surround the opening 13 on the front surface where the door bodies 19, 25, 31 are in contact with each other, and in front of the left and right vertical frame portions 16 _a . The guide frame piece 18 is protruded and positioned, and a guide groove 40 is formed between them.
[0021]
The first door body 19 has a trapezoidal protrusion 20 that matches the trough shape of the forward belt portion 9 _a and support shafts 22 that protrude at both ends, and both sides of the upper horizontal frame portion 16 _b of the frame body 16. with the support shaft 22 is rotatably supported in a bearing 23 which is disposed above the guide groove 40 in the square, the rotational driving mechanism comprising an electric motor is a motor 24 _a speed reducer 24 _b to one end of the support shaft 22 24 are connected. The first door body 19 rotates between a substantially horizontal opening position and a vertically downward closing position, and a sealing means 21 is provided on a lower end surface that faces downward when the door is closed.
[0022]
The second door body 25 has a trapezoidal recessed portion 26 that matches the trough shape of the outward belt portion 9 _a , and the left and right side edge portions are fitted in the guide grooves 40 and are opened on the cradle 30. and it is movable up and down between a little lifted closing position it against the door position and forward belt 9 _a. Further, sealing means 28 and 29 are provided on the upper end surface and the lower end surface of the second door body 25.
[0023]
The third door body 31 can be moved up and down by fitting the left and right side edge portions into the guide groove 40, and a sealing means 33 is provided on the upper end surface.
[0024]
The elevating drive mechanism 35 for elevating and lowering the third door body 31 includes an elevating machine 36 composed of two left and right worm jacks installed on a base 34 installed therebelow, and a prime mover coupled to one end of a transmission shaft 37 for driving them. 38 and the reduction gear 39.
[0025]
The first door 19 is in a horizontal state along the bottom surface of the floor 5 of the cargo compartment 4, the second door 25 is on the cradle 30, and the third door 31 is lowered by the elevator 36. In the door state, the cutting conveyor 9 travels without contacting these and conveys the bulk material discharged from the cargo compartment 4. The forward belt portion 9 _a is trough-shaped, and the return belt portion 9 _b is flat.
[0026]
When closing the opening 13, first, the first door body 19 in the horizontal state is rotated by the rotation drive mechanism 24 so as to be vertically downward, and the upper end portion of the surface facing the packing 17 of the frame body 16 and the left and right side ends. Press the parts together. At this time, the sealing means 21 of the lower end surface is spaced slightly above the forward belt unit 9 _a.
[0027]
Then, increasing the third door element 31 by the elevation driving mechanism 35, lifting it sealing means 33 of the flat upper surface is in contact with the lower surface of the return belt portion 9 _b, then return belt portion 9 _b upper surface of this contact with the sealing means 29 of the flat lower end surface of the second door member 25 pushed further to the lower surface of the second door member 25 of the concave upper end surface sealing means 28 forward the belt portion 9 _a of the It comes into contact with it and is lifted to come into contact with the sealing means 21 on the convex lower end surface of the first door body 19.
[0028]
In the closed state in which the second door body 25 and the third door body 31 are prevented from rising, the sealing surfaces 21 and 28 of the mating surfaces of the first door body 19 and the second door body 25 are the outward belt portion 9. by close contact with each other sandwich the _a, mating surfaces of the second door member 25 and the third door body 31 by sealing means 29, 33 is in close contact sandwich the return belt portion 9 _b, both watertight Is done. Further, the surfaces of the second door body 25 and the third door body 31 that are fitted to the guide grooves 40 at the left and right side edge portions are pressed against the packing 17 so that the four peripheral edges of the opening 13 are formed. Watertight.
[0029]
According to the illustrated embodiment, the return belt portion 9b is lifted up slightly in a flat shape, and the forward belt portion 9a is lifted up slightly in a trough shape to be in a closed state, so that excessive tension is not applied. There is no worry of prematurely degrading, and there is no worry of spilling the trough shape.
[0030]
Further, the first door body 19 may be opened and closed by being lifted and lowered without rotating if the installation space is sufficient.
[0031]
The present invention aims to increase the reliability of the watertightness of the mating surfaces in the closed state in which the three door bodies 19, 25, 31 overlap each other and the forward belt portion 9a and the return belt portion 9b are sandwiched therebetween. Therefore, the sealing means 21, 28, 29, 33 provided in the portion where the mating surface is formed for this purpose are represented by the configuration described below according to FIG. 6.
[0032]
That is, as a sealing means, a sealing portion 47 having a width that is almost a half of the thickness and larger than the thickness protrudes from the central portion of the surface of the thick-walled mounting substrate portion 46. The portion 47 includes a rectangular base portion 48 having a rectangular cross section and a trapezoidal trapezoidal top portion 49 whose top end corner portion is obliquely cut. The top surface of the trapezoidal top portion 49 is used as a sealing surface 50, and the left and right sides of the back surface of the mounting substrate portion 46. A packing 45 in which two protrusions 51 extending in the longitudinal direction of the mounting substrate portion 46 are provided in the vicinity of both side ends is used.
[0033]
The packing 45 is made of a rubber material having a hardness of H _s 45 to 55, preferably chloroprene rubber, which has excellent water resistance, oil resistance, and weather resistance, as well as tensile strength and impact resilience. It has the feature that is large.
[0034]
The above-described packing 45 is overlapped over a required end surface 57 of each door body 19, 25, 31 over substantially the entire length in the left-right longitudinal direction, and a cross-section L comprising a base portion 53 and a push plate portion 54 disposed on both sides thereof. The pressing member 52 of the mold is placed on the mounting substrate portion 46 that projects to both sides of the sealing portion 47, and penetrates the base portion 53 that is substantially adjacent to the outer surface of the mounting substrate portion 46 and overlaps the end surface 57 at an appropriate interval. By screwing the bolt 55 into the door body, the pressing plate portion 54 is pressed against the entire surface of the overhanging portion of the mounting substrate portion 46, and the protrusion 51 is crushed and the overhanging portion is fixed in a compressed state.
[0035]
According to the illustrated embodiment having such a fixing structure, the packing 45 is sandwiched between the pressing plate portion 54 and the end surface 57 and fixed in a compressed close contact state, and in particular, the packing 45 itself is formed by creating a gap between the end surface 57. It can be fixed without causing a mounting failure that impairs the water tightness of the.
[0036]
The trapezoidal top part 49 of the sealing part 47 protrudes from between the pressing plate parts 54 facing each other, and is compressed by sandwiching the belt 59 of the cutting conveyor 9 in the closed state. At this time, the top surface of the trapezoidal top portion 49 that is slanted on both sides is a seal surface 50 that contacts the belt 59 and is narrower than the rectangular base portion 48, so that it has an appropriate seal area and is highly compressed. be able to.
[0037]
For this reason, the seal surface 50 is brought into close contact with the belt 59 with a strong elastic force, and can be completely watertight. In addition, anticipating that the belt wears and gradually becomes thin, and by setting the stroke of the door body so that it is in the closed position in a state where it is greatly compressed with respect to the unworn belt, the wear progresses. Can be adhered with sufficient force. This is more reliably realized by making the packing 45 from the rubber-based material having the above-mentioned hardness.
[0038]
Further, according to the embodiment shown in the figure, the packing 45 deteriorated by a simple operation of attaching and detaching the bolt 55 can be removed and replaced, and there is an advantage that maintenance can be easily performed even in a narrow space on the ship.
[0039]
When the packings 45 facing each other on both outer sides of the belt cannot be directly adhered, it is possible to easily obtain watertightness of the entire mating surface by sandwiching a plate member having the same thickness as the belt.
[0040]
【The invention's effect】
According to the present invention in which the packing as described above is used as a sealing means for the mating surface of the door body, excellent watertightness can be provided at the closed door position with the belt sandwiched, and a highly reliable waterproof door can be obtained. It is.
[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 partially cutaway front view showing the embodiment of the waterproof door device according to the present invention when the door is opened.
3 is a cross-sectional view taken along line AA in FIG.
4 is a partially cut-away front view when the door of the embodiment shown in FIG. 2 is closed. FIG.
5 is a cross-sectional view taken along line BB in FIG.
6A and 6B show an embodiment of a sealing means according to the present invention, in which FIG. 6A is a sectional view of a packing, FIG. 6B is a sectional view of a state where it is attached to a door body, and FIG. FIG.
FIG. 7 is a cross-sectional view of a conventional example.
FIG. 8 is a cross-sectional view of a packing in a conventional example.
[Explanation of symbols]
3 Bulkhead, 4 Cargo compartment, 9 Cutout conveyor, 9 _a Outward belt, 9 _b Return belt, 13 Opening, 15 Waterproof door device, 19 First door, 25 Second door, 31 Third door, 21, 28, 29, 33 Sealing means, 45 packing, 46 mounting substrate portion 47 sealing portion, 48 rectangular base portion, 49 trapezoidal top portion, 50 sealing surface, 51 protrusion, 52 holding member, 55 bolt,

Claims (4)

  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 materials discharged from the bottom of the cargo compartment to the bow or stern is provided in the bulkhead. A waterproof door device for closing the opening in a bulk carrier installed through the opening, the first door body installed above the forward belt portion of the cutting conveyor, and the cutting conveyor A second door body installed between the forward belt portion and the return belt portion and a third door body installed below the return belt portion, and the three door bodies are spaced apart from each other in an open state. In the waterproof door device, it is possible to convey the bulk material by the cutting conveyor and overlap each other in the closed state so that the forward belt portion and the backward belt portion are sandwiched between the respective mating surfaces so as to be in close contact with each other. A packing comprising a mounting base part, a rectangular base part protruding from the mounting base part, and a trapezoidal trapezoidal trapezoidal top part, and a sealing part with the top surface of the trapezoidal top part being a sealing surface; A waterproof door device, characterized in that the mounting substrate portion is overlapped and fixed to end faces that sometimes face each other. The sealing portion protrudes from a central portion of the mounting substrate portion, and a portion projecting to both sides of the mounting substrate portion is compressed and adhered to the end surface by a pressing member that is detachably bolted to the door body. in loose product carrier waterproof door apparatus according to claim 1 that have been overlaid fixed.   3. The bulk carrier according to claim 2, wherein a protrusion that extends in a packing longitudinal direction is provided on a surface of the mounting substrate portion that is overlapped with the end face, and the protrusion is overlapped with the end face in a crushed close contact state. Waterproof door device.   The waterproof door device for a bulk carrier according to claim 1, wherein the packing is made of a rubber-based material having a hardness of Hs of 45 to 55.

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