JP2018086951A - Bilge discharge promotion pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suitable bilge discharge promotion pipe for discharging bilge to a bilge well by using in an iron ore exclusive ship with a large loading amount of iron ore to the volume of a hold.SOLUTION: A bilge discharge promotion pipe includes a first portion 20, a second portion 30, and a third portion 40 connected in this order. The first portion is provided in a bottom unit stool 120 supporting a partition wall 130 sectioning a hold into a plurality of cargo holds. The second portion is connected to the first portion and includes a plurality of holes 38 provided vertically along the partition wall and communicating with a hollow portion on a side surface. The third portion is connected to the second portion and an end unit 44 provided on a top unit stool 140 supporting the partition wall on the opposite side as the end unit connected with the second portion reaches a top unit deck 110b. Here, a hole provided on the second portion is provided to a position at least higher than a top surface of the load from the first portion side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bilge discharge promotion pipe, and more particularly, to a bilge discharge promotion pipe used to discharge water contained in a cargo loaded on a cargo tank of a ship to a bilge well.

  In a ship such as a cargo ship that transports iron ore or the like, water contained in a load of iron ore or the like (hereinafter also referred to as cargo) loaded on a cargo pit (hereinafter also referred to as hold). (Hereinafter also referred to as bilge) is discharged out of the ship through a bilge well provided near the bottom of the ship (see, for example, Patent Document 1).

  Here, it is known that iron ore called Carajas Fine loaded at PDM (Ponta Da Madeira) port in Brazil contains a lot of bilge.

  When the load is Carajas Fine, the wire mesh strainer (filter) provided at the discharge port to the bilge well is clogged, and the bilge is not discharged into the bilge well and may remain around the cargo. is there. If the bilge remains, the bilge drainage treatment or the like must be performed at the time of unloading, resulting in poor work efficiency. As a result, the unloading work takes time.

  There is a bilge discharge promotion pipe for efficiently discharging bilge into the bilge well, which has been invented in view of this problem (see, for example, Patent Document 1).

JP 2011-162072 A

  Here, FIG. 4 is a schematic diagram of the hold. FIG. 4A shows the hold of a bulk carrier, and FIG. 4B shows the hold of an ore dedicated ship.

  The conventional bilge discharge promotion pipe 11 disclosed in Patent Document 1 is effective when iron ore is loaded on a general bulk carrier. This is because the iron ore 201 is not fully loaded in the hold 101 due to restrictions on the loading capacity, specific gravity, and the like, and is loaded in a shape where the central portion is raised in the vicinity of the center of the hold 101 (FIG. 4 ( A)).

  However, in the so-called ore ship, the load of iron ore relative to the volume of the hold 102 is larger than that of cargo ships other than the ore ship. For this reason, in the ore-only ship, the above-described conventional bilge discharge promotion pipe 11 is buried by the cargo 202 (see FIG. 4B), and the bilge is discharged when iron ore is loaded, not limited to Carajas Fine. Is not done enough.

  The present invention has been made in view of the above-described problems, and an object of the present invention is a bilge discharge promoting pipe for discharging bilge contained in iron ore to a bilge well, and loading iron ore with respect to the hold volume. The object of the present invention is to provide a bilge discharge promoting pipe suitable for use in an ore carrier having a large amount.

  In order to achieve the above-described object, the bilge discharge promoting pipe of the present invention is provided in a cargo tub and discharges bilge contained in iron ore, which is a load loaded in the cargo ridge, into a bilge well.

  This bilge discharge promoting pipe is configured to include a first portion, a second portion, and a third portion that are connected in order.

  The first portion is provided in a lower stool that supports a bulkhead that divides the vessel into a plurality of cargo vessels. The second part is connected to the first part, is provided vertically along the partition wall, and includes a plurality of holes communicating with the hollow part on the side surface. The third portion is connected to the second portion and is provided in the upper stool that supports the partition wall, and the end opposite to the end connected to the second portion reaches the upper deck. Here, the hole provided in the second part is provided from the first part side to at least a position higher than the upper surface of the load.

  According to the bilge discharge promoting pipe of the present invention, the bilge is fed into the bilge discharge promoting pipe from the hole provided in the second portion, and is discharged to the bilge well through the first portion. As a result, the work of discharging the bilge in the cargo shed is unnecessary or reduced when unloading.

It is a schematic diagram of a bilge discharge promotion pipe. It is the schematic diagram which looked at the location where the bilge discharge promotion pipe is attached from the upper surface. It is a schematic diagram of the 2nd part of a bilge discharge | emission promotion pipe. It is a schematic diagram of a hold.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the shape, size, and arrangement relationship of each component are merely schematically shown to the extent that the present invention can be understood. Moreover, although the preferable structural example of this invention is demonstrated hereafter, the material of each component, a numerical condition, etc. are only a suitable example. Therefore, the present invention is not limited to the following embodiments, and many changes or modifications that can achieve the effects of the present invention can be made without departing from the scope of the configuration of the present invention.

  The bilge discharge promoting pipe of this embodiment will be described with reference to FIGS. FIG. 1 is a schematic diagram of a bilge discharge promoting pipe. Drawing 2 is a mimetic diagram which looked at the part where a bilge discharge promotion pipe is attached from the upper surface. FIG. 3 is a schematic view of the bilge discharge promoting pipe, particularly the second portion.

  Generally, in a cargo ship, a bilge well is provided near the bottom of the cargo hold. Water (bilge) contained in the cargo (cargo) is sent to the bilge well through a drain outlet provided on the bottom surface of the hold. The bilge sent to the bilge well is discharged out of the ship as needed depending on the situation.

  In the ore dedicated ship, the ship is divided into a plurality of holds 100 by bulkheads 130. Further, a bilge well 110 is provided near the bottom of the boat below the hold 100.

  The partition wall 130 is supported by a lower stool (Lower Tool) 120 on the bottom surface (also referred to as Tanktop) 110a side of the hold 100. In addition, the partition wall 130 is supported by an upper stool 140 on the deck (also referred to as an upper deck) 100b side. The partition wall 130 is formed of a corrugated plate, for example. The partition formed by the corrugated plate is also referred to as a corrugated bulkhead.

  Water (bilge) contained in the cargo (cargo) 200 is sent to the bilge well 110 through a drain port (not shown) provided on the bottom surface 110 a of the hold 100. The bilge sent to the bilge well 110 is discharged out of the ship as needed depending on the situation. Here, when the cargo 200 is Carajas Fine, a wire mesh-like strainer (filter) provided at the discharge port to the bilge well 110 is clogged, so that the bilge is not discharged to the bilge well 110 and the periphery of the cargo 200 is May remain.

  In the case of an ore dedicated ship, the upper surface 200 a of the cargo 200 reaches a high position from the bottom surface 110 a of the hold 100. For this reason, it is assumed that it is difficult to discharge the bilge from the drain outlet to the bilge well 110 as compared to the bulk carrier.

  Therefore, the bilge discharge promoting pipe 10 of this embodiment is configured by connecting the first portion 20, the second portion 30, and the third portion 40 in this order.

  The bilge discharge promotion pipe 10 is configured using a tubular member (pipe) made of any suitable material. A plurality of pipes are connected and processed as necessary to form a bilge discharge promoting pipe 10 having a predetermined shape. Here, the bilge discharge promoting pipe 10 will be described as a structure in which the first portion 20, the second portion 30, and the third portion 40 are connected, but is not limited thereto. For example, the first portion 20, the second portion 30, and the third portion 40 may be configured by connecting a plurality of pipes, respectively, or the first portion 20, the second portion 30, and the third portion 40 may be one. The pipe may be integrally formed.

  The first portion 20 is mainly provided in the lower stool 120. One end (first end) 22 of the first portion 20 is provided so as to be located in the bilge well 110. The other end portion (second end portion) 24 of the first portion 20 is provided so as to be positioned near the upper surface 120 a of the lower stool 120.

  The second portion 30 is provided vertically along the partition wall 130 from the upper surface 120 a of the lower stool 120 to the vicinity of the lower surface 140 a of the upper stool 140. One end portion (first end portion) 32 of the second portion 30 is connected to the second end portion 24 of the first portion 20. Further, the other end portion (second end portion) 34 of the second portion 30 is provided so as to be positioned near the lower surface 140 a of the upper stool 140.

  In addition, when the partition 130 is Corrugated Bulkhead, as shown in FIG. 2, the bilge discharge | emission promotion pipe 10 is provided in the part between this corrugated board. That is, the bilge discharge promotion pipe 10 is provided so as not to protrude from the corrugated bulkhead.

  The second portion 30 includes a plurality of holes 38 communicating with the hollow portion 36 on the side surface. The plurality of holes 38 can be formed by any suitable means. Here, if the diameter of the hole 38 is small, clogging may occur. On the other hand, if the diameter of the hole 38 is large, iron ore may enter a large amount into the bilge discharge promoting pipe 10 at the time of loading or unloading and there is a possibility that good performance may not be exhibited.

  Therefore, here, the diameter of the hole 38 is set to 10 mm. As long as good performance is exhibited, the diameter of the hole 38 may be smaller than 10 mm or larger than 10 mm.

  Four holes 38 are provided at equal intervals on the circumference of the cross section perpendicular to the longitudinal direction of the second portion 30. That is, they are provided at positions of 0 degrees, 90 degrees, 180 degrees, and 270 degrees with respect to the center of the cross section. The four holes 38 as a set are provided at intervals of 100 mm in the longitudinal direction of the second portion 30. The positions of adjacent pairs of holes 38 are shifted by 45 degrees with respect to the center of the cross section. Therefore, for example, when the positions of a pair of holes 38 are 0 degrees, 90 degrees, 180 degrees, and 270 degrees with respect to the center of the cross section, the positions of the pairs of holes 38 adjacent in the longitudinal direction are It becomes 45 degrees, 135 degrees, 225 degrees, and 315 degrees with respect to the center. Note that the arrangement and number of holes are not limited to the above-described configuration as long as good performance is exhibited.

  These holes 38 are provided from the first end portion 32 side to the second end portion 34 side of the second portion 30 to at least a position higher than the upper surface 200a of the cargo 200, that is, a position higher than the loading height. .

  Here, the loading height refers to the height of the upper surface 200 a of the cargo 200 from the bottom surface 110 a of the hold 100 in the partition wall 130. In addition, the static angle is the maximum angle that collapses when stacked at a higher angle, and the static angle of iron ore is said to be about 36 degrees.

  Here, the weight of iron ore loaded on the hold 100 (unit: MT (metric ton) = 1,000 kg) and the volume of the hold 100 (unit: CFT (cubic feet) = 1.133 cubic meter) are given. Assuming that the loading coefficient SF (Stage Factor) is 13.5 CFT / MT and the stationary angle is 25 degrees, the loading height is, for example, 11.8 m.

  Therefore, it is necessary to provide the hole 38 at least from the bottom surface 110a of the hold 100 to a position higher than the height of 11.8 m.

  Note that as the loading coefficient SF increases, the loading height increases. The loading coefficient SF of general iron ore is 13.0 to 13.5, but it is preferable that the loading coefficient SF can be discharged up to 15. For this reason, in this embodiment, the hole 38 is provided from the bottom face 110a of the hold 100 to a position higher than the height of 13.2 m.

  Here, the loading coefficient SF is determined by the shape of the hold, the production area of the iron ore, the brand, and the like. In addition to the above, the loading height is determined by the loading amount of the cargo 200 and the stationary angle.

  The third portion 40 is mainly provided in the upper stool 140. One end (first end) 42 of the third portion 40 is connected to the second end 34 of the second portion 30. The other end portion (second end portion) 44 of the third portion 40 is provided near the upper surface of the upper stool 140, that is, near a position reaching the upper deck 100b. FIG. 1 shows an example in which the first end 42 of the third portion 40 is provided below the lower surface 140a of the upper stool 140, and the second end 44 of the third portion 40 is provided on the upper deck 100b. However, the first end portion 42 and the second end portion 44 may be provided in the upper stool 140.

  According to the bilge discharge promotion pipe 10, the bilge is sent into the bilge discharge promotion pipe 10 from the hole 38 provided in the second portion 30, and is discharged to the bilge well 110 through the first portion 20. As a result, the work of discharging the bilge in the cargo shed is unnecessary or reduced when unloading.

  In addition, the first portion 20 of the bilge discharge promoting pipe 10 is provided in the lower stool 120, and the second portion 30 is provided so as not to protrude from the corrugated bulkhead when the partition wall 130 is a corrugated bulkhead. For this reason, the unloading work is not hindered by the bilge discharge promoting pipe 10.

  In this bilge discharge promoting pipe 10, iron ore may enter the pipe 10 from the hole 38 provided in the second portion 30, and there is a possibility that good performance may not be exhibited. Therefore, the maintenance work etc. which remove the iron ore in the pipe 10 are needed.

  However, in the bilge discharge promoting pipe 10, the first portion 20 is provided in the lower stool 120 and the third portion 40 is provided in the upper stool 140. Moreover, the 2nd part 30 is 10 m or more in length. For this reason, it is not easy to perform maintenance inspections during operation.

  Therefore, by pouring water into the bilge discharge promoting pipe 10 from the second end portion 44 of the third portion 40, an operation of flowing the iron ore in the pipe out of the pipe is performed. In the bilge discharge promoting pipe 10, the second end 44 of the third portion 40 is provided in the vicinity of the upper deck 110b, so that an operator who performs this maintenance work can easily access.

  Further, the second end portion 44 of the third portion 40 is preferably sealed by a removable sealing means. According to this configuration, the work is performed by removing the sealing means of the second end portion 44 only when water injection into the pipe is necessary, and in other cases, it is unnecessary by sealing. It is possible to prevent objects from entering the pipe.

10 Bilge emission promotion pipe
20 1st part 22,32,42 1st end part 24,34,44 2nd end part 30 2nd part
36 hollow part 38 hole
40 Third part 100 Hold 110 Bilge well 120 Lower stool 130 Bulkhead 140 Upper stool 200 Cargo

Claims (2)

A bilge discharge promotion pipe that discharges bilge contained in iron ore, which is a load, into a bilge well,
Connected in order,
A first portion provided in a lower stool that supports a bulkhead dividing the ship into a plurality of cargo poles;
A second portion connected to the first portion, provided vertically along the partition wall, and provided with a plurality of holes communicating with the hollow portion on a side surface;
A third portion connected to the second portion and provided in an upper stool for supporting the partition; and an end opposite to the end connected to the second portion, and a third portion reaching the upper deck,
The hole provided in the second part is provided from the first part side to at least a position higher than the upper surface of the load. The end of the third portion, which is the end opposite to the end connected to the second portion, is sealed by a detachable sealing means. Bilge discharge promotion pipe as described in.

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