KR20110107232A - Structure of ballast tank for elimination sediment from ballast tank - Google Patents

Abstract

A sediment discharge structure of a ballast tank is disclosed. A sediment discharge structure of a ballast tank for discharging sediment in a ballast tank provided in the hull of a ship, comprising: a plurality of web frames installed in the ballast tank and partitioning the inside of the ballast tank in the up and down direction of the hull, each having a plurality of manholes; A plurality of stringers installed in the ballast tank and partitioning the inside of the ballast tank in the bow and stern directions of the hull and intersecting the plurality of web frames, wherein the plurality of drain holes are formed in the web frame under the plurality of manholes, respectively The drain hole provides a sediment discharge structure of the ballast tank, characterized in that located in the lower portion of the plurality of unit tanks formed by partitioning the inside of the ballast tank by the web frame and the stringer, so that the sediment in the ballast tank and the ballast water at the time of deballasting Easily discharged together You can rock.

Description

Sediment drainage structure of ballast tank {STRUCTURE OF BALLAST TANK FOR ELIMINATION SEDIMENT FROM BALLAST TANK}

The present invention relates to a sediment discharge structure of the ballast tank, and relates to a sediment discharge structure of the ballast tank to efficiently discharge the sediment in the ballast tank during de-ballasting.

The ship is provided with a ballast tank to minimize the increase in the center of gravity of the ship by loading and unloading the cargo. In other words, the ship is designed to enable economical and stable operation when the cargo is loaded, and thus the amount of ballast water in the ballast tank is adjusted according to the cargo load, so that the vessel is similar to the cargo loaded cargo. Make it a condition.

Here, the amount of ballast water in a ballast tank is adjusted by the method which normally introduces or discharges the surrounding seawater or fresh water to a ballast tank with a pump. In addition, since the inflow or outflow of ballast water is carried out before the vessel starts to operate in earnest, the port where cargo is loaded and unloaded except in cases where it enters a country where the ballast water is prohibited by law within the territorial waters. Or in the vicinity thereof.

At this time, in the process of introducing the ballast water into the ballast tank, various foreign substances mixed in seawater or freshwater in or near the port, ie, inorganic materials such as gravel, sand, and mud, living organisms such as fish and shellfish or plankton, etc. do.

Since the vessel can operate for several months, the foreign matter as set forth above is deposited on the bottom surface of the ballast tank while the vessel is operated while such foreign matter is introduced into the ballast tank. In particular, if the ship is operated for a long time, the precipitated foreign matter may harden and stick to the bottom surface of the ballast tank.

Foreign material entering the ballast tank can corrode the ballast tank, and foreign matter settled or fixed on the bottom of the ballast tank increases the load on the ballast tank, that is, the vessel. When the load of the vessel is increased, it becomes difficult to operate the vessel stably, or a problem arises in that the cargo load capacity or operation speed is lowered.

In order to solve this problem, various methods such as installing a device for removing sediment in the ballast tank or filtering incoming seawater or fresh water have been attempted.

However, the sediment once fixed may not be easily removed, and it may be costly to continuously circulate the ballast water so that foreign matter does not settle while the ship is sailing for a long time, and it may be expensive to filter the seawater or fresh water. When supplying to the tank, there is a problem such as a huge time is required. In addition, the installation of additional sediment removal devices and filtering devices in the ballast tanks of already built vessels may be costly and time consuming, or may not be possible to install the devices themselves.

Therefore, the research and development to remove the foreign substances introduced into the ballast tank is continuously progressed, but the situation is difficult to apply to the actual ship or the effect is often many.

According to the present invention, foreign matter contained in the ballast water introduced into the ballast tank may be effectively discharged together with the ballast water when deballasting.

In order to achieve the above object, according to an aspect of the present invention, as a sediment discharge structure of the ballast tank for discharging the sediment in the ballast tank provided in the hull of the ship, is installed in the ballast tank and the inside of the ballast tank A plurality of web frames partitioned in the up and down direction of the hull, each of which has a plurality of manholes, and is installed in the ballast tank and partitions the inside of the ballast tank in a bow and stern direction of the hull and intersects with the plurality of web frames. A plurality of stringers are formed in the web frame, a plurality of drain holes are formed in the lower side of the plurality of manholes, respectively, The plurality of drain holes are a plurality of units formed by partitioning the interior of the ballast tank by the web frame and the stringer Located in the lower part of the tank, The sediment discharge structure of the ballast tank is provided.

The sediment discharge structure of the ballast tank may further include an inclined plate disposed on the bottom surface of the unit tank and inclined downward toward the drain hole.

The drain hole of the sediment discharge structure of the ballast tank may be circular or polygonal.

The sediment discharge structure of the ballast tank described above is coupled to the bottom surface of the unit tank protruding upward, and further includes a flat pin or curved guide pin disposed so that the flow path of the ballast water narrows closer to the drain hole. can do.

And a water supply pipe disposed side by side with the stringer in a shape passing through the plurality of unit tanks through a plurality of manholes, and connected to the water supply pipe so as to be arranged at least one in the plurality of unit tanks and extending in the transverse direction of the hull. It further comprises a nozzle having a predetermined shape, the nozzle may be formed with a plurality of injection holes or slits in which water is injected in the direction inclined toward the drain hole to the bottom surface of the unit tank during deballasting.

The apparatus may further include a pump connected to the drain pipe to supply the water, wherein the water may be any one of seawater, fresh water, and the ballast water.

The apparatus may further include a plurality of branch pipes interposed between the water supply pipe and the plurality of nozzles, and the nozzles may be disposed to be close to the bottom surface of the unit tank by the branch pipes.

According to an embodiment of the present invention, the sediment in the ballast tank is easily discharged together with the ballast water during deballasting.

1 illustrates a cross section of a vessel having a double hull;
Figure 2 shows a part of the wing tank of the vessel illustrated in Figure 1;
Figure 3 shows a web of sediment discharge structure of the ballast tank according to an embodiment of the present invention.
4 and 5 show variants of the web shown in FIG. 3.
Figure 6 is a view showing a longitudinal section of the sediment discharge structure of the ballast tank according to an embodiment of the present invention.
7 is a cross-sectional view taken along the line VII-VII of FIG. 6.
8 is a view for explaining the water supply pipe of the sediment discharge structure of the ballast tank according to an embodiment of the present invention.
9 is a cross-sectional view taken along the line VII-VII of FIG. 8.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a cross section of a ship having a double hull.

Referring to FIG. 1, the hull 10 of the ship 1 is a double hull, which includes an outer hull 11 and an inner hull 12. The hull 10 is provided with a plurality of ballast tanks, the ballast tank is provided with a wing tank 20 provided between the outer hull 11 and the inner hull 12 and the bottom provided below the hull 10 Bottom tanks 30 and the like.

FIG. 2 shows a portion of the wing tank of the ship illustrated in FIG. 1.

Referring to FIG. 2, a plurality of web frames 23 and 24 are formed in the wing tank 20 so as to partition the inside in the vertical direction of the hull 10 and the plurality of manholes 23a and 24a are formed. In the wing tank 20, a plurality of stringers 21 and 22 intersecting the inside in the bow and stern directions of the hull 10 and intersecting the plurality of web frames 23 and 24 are provided.

Here, the web frames 23 and 24 and the stringers 21 and 22 are reinforcing materials for improving the strength of the hull 10, and the manholes 23a and 24a formed in the web frames 23 and 24 are workers and various equipments. It is used as an aisle and a ballast flow path.

As described above, a plurality of zones formed by the web tanks 23 and 24 and the stringers 21 and 22 are formed in the inner space of the wing tank 20. In the following description, such a plurality of zones will be referred to as 'unit tank'.

3 shows a web of sediment discharge structure of a ballast tank according to one embodiment of the invention.

Referring to Figure 3, the web frame 100 disposed on one side of the unit tank of the sediment discharge structure of the ballast tank according to an embodiment of the present invention, the manhole 120 is formed in the flat web 110, The drain hole 130 is formed below the manhole 120.

The drain hole 130 is formed to be positioned below the unit tank, so that the sediment remaining on the lower side of the unit tank during the deballasting may flow through the drain hole 130 together with the ballast water.

Although not shown, the drain hole 130 may be formed in various shapes such as circular or polygonal. In particular, when one side of the drain hole (not shown) having a polygonal shape is in contact with the bottom of the unit tank, sediment that does not float well due to the flow of ballast water, such as gravel, may pass smoothly than the circular drain hole 130. Can be.

For reference, the position of the drain hole 130 may be formed at various locations below the unit tank.

4 and 5 show variants of the web shown in FIG. 3.

Referring to FIG. 4, a manhole 121 is formed in the web 111 of the web frame 101, and a drain hole 131 is formed below the manhole 121. In addition, the inclined plate 141 is installed near the lower end of the web 111, that is, near the bottom of the unit tank.

Here, the drain hole 131 is formed below one side edge of the web 111, the inclined plate 141 is installed to be inclined downward toward the drain hole 131. Therefore, since the foreign matter introduced into the ballast tank is precipitated near the drain hole 131 by the inclined plate 141, foreign matter remaining in the lower side of the unit tank during deballasting flows more smoothly through the drain hole 131 together with the ballast water. Can be.

Referring to FIG. 5, a manhole 122 is formed in the web 112 of the web frame 102, and a drain hole 132 is formed below the manhole 122. Then, the inclined plate 142 is provided near the lower end of the web 112, that is, the bottom of the unit tank.

As shown, the inclined plate 142 is installed to be inclined downward toward the drain hole 132 formed in the central portion of the lower end of the web (112). Therefore, the foreign matter introduced into the ballast tank is precipitated in the vicinity of the drain hole 132 by the inclined plate 142. Therefore, as described above, in the deballasting, the precipitate in the unit tank flows smoothly through the drain hole 132.

6 is a longitudinal cross-sectional view of the sediment discharge structure of the ballast tank according to an embodiment of the present invention, Figure 7 is a cross-sectional view taken along the line VII-VII of FIG. It demonstrates with reference to FIG. 6 and FIG.

6 and 7, the deposit discharge structure of the ballast tank according to an embodiment of the present invention includes a plurality of unit tanks as described above. The unit tank is formed by partitioning the space between the outer hull 11 and the inner hull 12 by the plurality of web frames 100 and the plurality of stringers 210 and 220. The manhole 120 and the drain hole 130 are formed in the web 110 as described with reference to FIG. 3.

The guide pins 150 and 151 are coupled to the bottom surface of the unit tank, that is, the upper surface of the stringer 210 below the unit tank so as to protrude upward. The guide pins 150 and 151 are arranged so that the flow path of the ballast water becomes narrower as the drain hole 130 gets closer, and the guide pins 150 and 151 may have a flat plate shape as shown in the drawing. It may have a shape.

The arrows in the figure illustrate the wired wire (Wf) of the ballast water at the time of deballasting. As described above, the ballast water flowing from the drain holes 130a of the adjacent unit tanks becomes closer to the drain hole 130. The number of flow paths is narrowed by the guide pins 150 and 151. As the flow rate of the ballast water is narrowed, the flow rate increases, and the precipitates which have settled out are separated from the bottom of the unit tank by the high flow rate of the ballast water during deballasting.

That is, the guide pins 150 and 151 separate the sediment from the bottom of the unit tank, and the separated sediment is discharged to the drain hole 130 together with the ballast water. In addition, the guide pins 150 and 151 allow the ballast water to flow together with the streamline Wf, thereby preventing deposits from accumulating on the corners of the bottom of the unit tank.

8 is a view showing a water supply pipe is further installed on the sediment discharge structure of the ballast tank according to an embodiment of the present invention, Figure 9 is a cross-sectional view taken along the line VII-VII of FIG. It demonstrates with reference to FIG. 8 and FIG.

8 and 9, the sediment discharge structure of the ballast tank described with reference to FIGS. 6 and 7 further includes a pump 161, a water supply pipe 160, a branch pipe 162, and a nozzle 163.

The water supply pipe 160 is disposed parallel to the stringers 210 and 220 in a shape of passing through the plurality of unit tanks through the manhole 120.

The nozzle 163 is connected to the water supply pipe 160, and the nozzles 163 are disposed one by one in the plurality of unit tanks. Although not shown, the number of nozzles 163 disposed in one unit tank may be added or subtracted as necessary.

The nozzle 163 has a shape extending in the transverse direction of the hull (see 10 in FIG. 1), that is, in a direction extending one surface of the inner hull 12 from one surface of the outer hull 11. The nozzle 163 is provided with a plurality of injection holes (not shown) or slits (not shown) in which water is injected in a direction inclined toward the drain hole 130 to the bottom of the unit tank during deballasting.

The water supply pipe 160 is connected to the pump 161 for supplying water, and the water supplied by the pump 161 to the drain pipe may supply seawater or fresh water around the vessel (see 1 in FIG. 1), and supply ballast water. It may be.

As shown, the branch pipe 162 may be interposed between the water supply pipe 160 and the nozzle 163. The distance between the bottom of the unit tank and the nozzle 163 may be adjusted according to the length of the branch pipe (162).

Therefore, when the pump 161 is operated to supply water to the water supply pipe 160 during deballasting, as indicated by an arrow through injection holes (not shown) or slits (not shown) formed in the nozzle 163. Water is sprayed toward the drain hole 130 in a large area of the bottom of the unit tank as shown. Therefore, the sediment attached to the bottom of the unit tank is suspended and is discharged through the drain hole 130 together with the ballast water flowing like the streamline (Wn).

At this time, if the length of the branch pipe 162 is properly formed, the nozzle 163 is disposed close to the bottom of the unit tank can be improved the effect of floating the precipitate.

Although the sediment discharge structure of the ballast tank according to the embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments presented herein, those skilled in the art to understand the spirit of the present invention the scope of the same idea Within the scope of the present invention, other embodiments may be easily proposed by adding, changing, deleting, adding, etc., but this is also within the scope of the present invention.

11: outer hull 12: inner hull
20: wing tank 21, 22: stringer
23, 24: web frame 23a, 24a: manhole
100, 101, 102: web frame 110: web
120, 121, 122: manhole 130, 130a, 131, 132: drain hole
141, 142: inclined plate 150, 151: guide pin
160: water supply pipe 161: pump
162: branch pipe 163: nozzle
210, 220: stringer

Claims (7)

A sediment discharge structure of a ballast tank for discharging sediment in a ballast tank provided in the hull of a ship,
A plurality of web frames installed in the ballast tank, partitioning the inside of the ballast tank in the vertical direction of the hull, and having a plurality of manholes respectively; And
A plurality of stringers installed in the ballast tank and partitioning the inside of the ballast tank in the bow and stern directions of the hull and intersecting the plurality of web frames;
The web frame is formed with a plurality of drain holes, respectively, under the plurality of manholes,
The plurality of drain holes are located in the bottom of the plurality of unit tanks formed by partitioning the inside of the ballast tank by the web frame and the stringer, respectively, sediment discharge structure of the ballast tank.
The method of claim 1,
It is disposed on the bottom of the unit tank, the sediment discharge structure of the ballast tank further comprises an inclined plate inclined downward toward the drain hole.
The method of claim 1,
Sediment discharge structure of the ballast tank, characterized in that the drain hole is circular or polygonal.
4. The method according to any one of claims 1 to 3,
The sediment discharge of the ballast tank further comprises a guide pin of a flat plate or curved plate coupled to the bottom surface of the unit tank in an upwardly protruding shape, the closer to the drain hole, the narrower the flow path of the ballast water. Structure.
The method of claim 4, wherein
A water supply pipe disposed parallel to the stringer in a shape of passing through the plurality of unit tanks through the plurality of manholes; And
A nozzle connected to the water supply pipe so as to be disposed at least one in the plurality of unit tanks, the nozzle having a shape extending in the transverse direction of the hull;
The nozzle has a deposit discharge structure of the ballast tank, characterized in that a plurality of injection holes or slits are formed to be sprayed in the direction inclined toward the drain hole to the bottom surface of the unit tank during deballasting.
The method of claim 5,
A pump connected to the drain pipe to supply the water;
The water is sediment discharge structure of the ballast tank, characterized in that any one of sea water, fresh water and the ballast water.
The method of claim 5,
Further comprising a plurality of branch pipes respectively interposed between the water supply pipe and the plurality of nozzles,
And a nozzle is disposed near the bottom of the unit tank by the branch pipe.

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