KR102352341B1 - ship ballast water system - Google Patents

Abstract

It is a ballast water system (2) capable of improving safety. According to a representative embodiment, it is a ballast water system (2), which sucks ballast water from the sea chest (6) by a pump (7). Next, the water treatment device 3 water-treats the sucked ballast water. Ballast water treated by the water treatment device 3 is received by the receiver tank 9 and supplied to the ballast tank 4 . In the receiver tank 9 , the pressure by the pump 7 is reduced, so that the ballast water system 2 can prevent excessive pressure from being applied to the ballast tank 4 .

Description

ship ballast water system

The present invention relates to a technology of a ballast water system for a ship.

Conventionally, as a technique for filling the ballast tank of a ship with seawater, for example, in Japanese Patent Laid-Open No. 2007-90933 (Patent Document 1), seawater is introduced by sucking seawater with a pump, and filling the ballast tank with seawater is described. has been

Japanese Patent Laid-Open No. 2007-90933

In the prior art described in patent document 1, since seawater is sucked with a pump and filled in a ballast tank, the pressure of a pump is applied to a ballast tank, and a ballast tank may be damaged. That is, there is a possibility that a safety problem may occur.

Accordingly, an object of the present invention is to provide a ballast water system capable of improving safety.

The above and other objects and novel features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

Among the inventions disclosed in this application, the outline|summary of a representative thing is briefly described as follows.

A ballast water system according to a representative embodiment of the present invention is a ballast water system that fills a ballast tank of a ship with ballast water, a pump for sending out ballast water introduced from a sea chest, and a ship sent by the pump A pressure reducing mechanism for reducing the pressure by a pump is provided in the flow path of the ballast water.

Among the inventions disclosed in the present application, the effects obtained by the representative ones will be briefly described as follows.

That is, according to a representative embodiment of the present invention, it becomes possible to improve safety.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the ship to which the ship ballast water system which concerns on one Embodiment of this invention is applied.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail based on drawing. In addition, in all the drawings for demonstrating embodiment, the same code|symbol is attached|subjected to the same part in principle, and the repeated description is abbreviate|omitted. On the other hand, parts described with reference numerals in some drawings are sometimes referred to with the same reference numerals, although not repeatedly illustrated in the description of other drawings.

In addition, in the following description, the term "above" and "below" corresponds to the vertical direction of the ship.

1 : is a schematic diagram which shows the ship 1 to which the ship ballast water system 2 which concerns on one Embodiment of this invention is applied. As shown in FIG. 1 , a ship 1 is a ship, such as a ship dedicated to automobiles, that transports cars or the like. The ballast water system 2 is a system which fills the ballast tank 4 of the ship 1 with ballast water.

The ballast water system 2 includes a water treatment device 3 , a ballast tank 4 , an air vent 5 , a sea chest 6 , a pump 7 , and a pipe 8 (piping ( 8a), a pipe (8b)), a receiver tank (9), an air vent (10), an overflow pipe (11), a valve (12), a valve (13), a valve (14), The valve 15 is provided and configured.

The water treatment device 3 is a so-called BWMS (Ballast Water Management System). That is, the water treatment device 3 performs water treatment of ballast water from the outside when the ballast tank 4 is filled with water, and at the time of drainage from the ballast tank 4 , the ship from the ballast tank 4 . It has the function of performing water treatment of ballast water.

The water treatment device 3 is connected to a sea chest 6 and a ballast tank 4 that introduce seawater from the outside of the ship 1 . The water treatment device 3 has a function of treating ballast water using electricity or treating ballast water by irradiating ultraviolet rays.

In addition, in this embodiment, the untreated water introduce|transduced from the sea chest 6 and the water which water treatment is performed and the water filled in the ballast tank 4 shall all be called "ship ballast water".

The pump 7 introduces ballast water from the sea chest 6 and sends the ballast water to the water treatment device 3 .

The ballast tank 4 fills or drains ballast water according to the cargo load in the ship 1, so that the entire ship 1 is submerged to a certain level by the weight of the water in the tank regardless of the cargo volume. .

The ballast tank 4 fills the ballast water by sucking seawater with the pump 7 when cargoes (eg, automobiles) are small, and drains the ballast water into seawater as the cargoes increase. In addition, the ballast tank 4 is provided in the lower part of the ship 1 (for example, the bottom of the ship 1). This is in consideration of the light weight of the cargo.

An air vent 5 (air pipe) is connected to the upper wall of the ballast tank 4 . This air vent 5 is opened to the outside of the ship from the exhaust port. That is, one side of the air vent 5 is connected to the ballast tank 4, and the other side is open to the outside of the ship. The air vent 5 discharges the air in the ballast tank 4 to the outside of the ship through the outlet when the ballast water is transferred to the ballast tank 4 .

On the outflow side (ballast tank 4 side) of the water treatment apparatus 3, the receiver tank 9 is provided through the piping 8a. The receiver tank 9 is a tank with a larger diameter than the pipe 8a, and temporarily receives (stores) ballast water. In this way, the receiver tank 9 temporarily receives the ship's ballast water, and thus functions as a water receiving means.

An air vent 10 is connected to the upper wall of the receiver tank 9 . This air vent 10 is opened to the outside of the ship from the exhaust port. The air vent 10 discharges the air in the receiver tank 9 to the outside of the ship through the outlet when the ballast water is transferred to the receiver tank 9 . That is, the air vent 10 functions as a discharge means for discharging the air in the receiver tank 9 . In addition, the air vent 10 may be open|released to the inside of a ship from an exhaust port. That is, the air vent 10 may be configured to discharge the air in the receiver tank 9 into the ship.

Since the pressure by the pump 7 is dispersed in the receiver tank 9 and the air vent 10 exhausts the air in the receiver tank 9, the pressure by the pump 7 can be reduced. The receiver tank 9 fills the ballast tank 4 with water through a pipe 8b having a smaller diameter than the bottom face 91 of the receiver tank 9 .

In this way, the receiver tank 9 and the air vent 10 have the flow path of the ballast water sent by the pump 7 (the flow path to the ballast tank 4 including the pipe 8a and the pipe 8b). In this, it functions as a pressure reducing mechanism for reducing the pressure by the pump 7 .

Thereby, the receiver tank 9 can fill the ballast tank 4 by gravity without applying excessive pressure with the ship ballast water supplied from the water treatment apparatus 3 .

An overflow pipe 11 is connected to the receiver tank 9 . This overflow pipe 11 discharges the ballast water stored in the receiver tank 9 by a predetermined amount or more from the connection port 111 to the discharge port 112 . In addition, the coupler 111 is at a position lower than the uppermost part 51 of the air vent 5 . Moreover, the discharge port 112 of the overflow pipe 11 exists in the lower part of the ship 1 (for example, the position lower than the connection port 111).

The valve 12 , the valve 13 , the valve 14 , and the valve 15 are open/closeable valves.

(action description)

Next, the operation in the case where the ballast water system 2 fills the ballast tank 4 with ballast water will be described. First, the valve 12 , the valve 13 , and the valve 15 are opened, and the valve 14 is closed.

Next, the ballast water is sucked from the sea chest 6 by the pump 7 . Next, the water treatment device 3 water-treats the sucked ballast water. The receiver tank 9 receives the ballast water treated by the water treatment device 3 , and supplies the ballast water to the ballast tank 4 .

When the ballast water exceeding the capacity of the ballast tank 4 is supplied from the water treatment device 3, since the connection port 111 (connection part) is at a position lower than the uppermost part 51, the ballast water of the overflow amount is air It does not discharge from the vent (5), but discharges from the overflow pipe (11).

Next, the operation|movement which discharges the ballast water filled in the ballast tank 4 to the outside of a ship is demonstrated. First, the valve 13 and the valve 15 are closed, and the valve 12 and the valve 14 are opened. Next, the ballast water is sucked from the ballast tank 4 by the pump 7 . Next, the water treatment device 3 water-treats the suctioned ballast water. The receiver tank 9 receives the ballast water treated by the water treatment device 3 and stores the ballast water. When the receiver tank 9 stores a certain amount of ballast water, the ballast water is discharged from the overflow pipe 11 to the outside of the ship.

As described above, in the ballast water system 2, in the flow path of the ballast water delivered by the pump 7, the receiver tank 9 depressurizes the pressure by the pump 7, and the ballast tank ( Fill in 4).

The receiver tank 9 can reduce the pressure by the pump 7 and fill the ballast tank 4 only by the action of gravity. Thereby, the ship ballast water system 2 can prevent that excessive pressure is applied to the ballast tank 4 . As a result, the ballast water system 2 can reduce the possibility that the ballast tank 4 is deformed or ruptured.

In addition, when a large amount of ballast water is supplied from the water treatment device 3, the connection port 111 is at a position lower than the uppermost part 51, and since the ballast water is discharged from the overflow pipe 11, the air vent 5 ) can prevent the ballast water from being discharged.

In particular, when the water treatment device 3 is mounted, it is difficult to fill the ballast water in the ballast tank 4 without using the pump 7 , and the influence of the pressure by the pump 7 cannot be ignored. As in the ballast water system 2 described above, by reducing the pressure by the pump 7 in the receiver tank 9, safety can be improved.

Further, the receiver tank 9 temporarily receives the ballast water supplied from the water treatment device 3 at the bottom 91 or the like, and the air vent 10 exhausts the air in the receiver tank 9, Fill the ballast tank (4) with water. Accordingly, the ballast water system 2 can reduce the pressure from the pump 7 .

In addition, since the ballast tank 4 is provided in the lower part of the ship 1, it can be filled suitably by gravity.

Moreover, since the overflow pipe 11 is opened to the outside of the lower part of the ship 1, it can avoid that a ship ballast water discharges to a deck etc.

Although the above-mentioned embodiment demonstrated the case where the receiver tank 9 functions as a drip tray means, you may make it apply a pipe etc. which have a diameter larger than the piping 8a as a drip tray means.

Moreover, the valve 13 may be closed, the water treatment apparatus 3 may be made to operate all the time, and you may make it store the ballast water in the receiver tank 9 continuously. The amount to overflow is discharged from the overflow pipe 11 . Thereby, the effect of maintaining the load of the water treatment apparatus 3 constant and avoiding a malfunction or extending life can be acquired.

Although the above-mentioned embodiment demonstrated the case where the ballast tank 4 is installed in the lower part of the ship 1, you may install in the up-down direction center vicinity of the ship 1, You may install in the upper half of the ship 1 also good

As mentioned above, although the invention made by this inventor was demonstrated concretely based on embodiment, this invention is not limited to the said embodiment, It goes without saying that various changes are possible in the range which does not deviate from the summary. For example, the above embodiment has been described in detail in order to explain the present invention in an easy to understand manner, and it is not necessarily limited to having all the configurations described. In addition, a part of the structure of one embodiment can be substituted with the structure of another embodiment, Furthermore, it is also possible to add the structure of another embodiment to the structure of a certain embodiment. In addition, with respect to a part of the structure of each embodiment, another structure can be added, deleted, and substituted.

INDUSTRIAL APPLICABILITY The present invention is applicable to a ballast water system for filling ballast water.

1: ship
2: Ballast water system
3: water treatment device
4: ballast tank
5: Air vent
6: Sea Chest
7: Pump
8: plumbing
9: Receiver Tank
10: air vent
11: overflow tube
12: valve
13: valve
14: valve
15: valve.

Claims (5)

It is a ship ballast water system that fills the ship's ballast tank with ballast water,
a pump connected to both the flow path from the sea chest and the flow path from the ballast tank;
a water treatment device installed in the flow path through which the ballast water from the pump is sent;
a pressure reducing mechanism installed in the flow path of the ballast tank in the flow path through which the ballast water from the water treatment device is sent, and reducing the pressure by the pump;
When filling the ballast tank with ballast water,
The pump sends the ballast water received from the sea chest to the water treatment device,
The water treatment device water-treats the ballast water from the pump, and sends the ballast water after the water treatment to the pressure reducing mechanism;
The pressure reducing mechanism stores the ballast water after the water treatment, and fills the ballast water in the ballast tank by transferring the stored ballast water to the ballast tank by gravity,
When draining from the ballast tank,
The pump sends the ballast water from the ballast tank to the water treatment device,
The water treatment device sends the ballast water from the pump to the pressure reducing mechanism,
The pressure reducing mechanism stores the ballast water from the water treatment device and discharges the stored ballast water without transferring it to the ballast tank. The method of claim 1,
The pressure reducing mechanism is
a receiver tank for temporarily storing the ballast water;
an overflow pipe connected to a connection part at a position lower than an uppermost part of an air pipe connected to the ballast tank as a connection part in the receiver tank;
When draining from the ballast tank, the pressure reducing mechanism discharges the stored ballast water from the overflow pipe. 3. The method of claim 2,
The pressure reducing mechanism is provided above the connection part of the receiver tank and includes an air vent for discharging air in the receiver tank. The method of claim 1,
The ballast tank is installed in the lower part of the ship, and the water treatment device is installed higher than the ballast tank, the pump, and the pressure reducing mechanism.
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