JPH1024894A - Method for changing draft of ship - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for changing draft of a ship which can be applied to the ship at a slight cost even if the system is automated to a substantial extent. SOLUTION: A pump controlling device 6 for a pump is connected to a data bas system 5. The data bas system 5 is connected to a host draft controlling device. A draft detection device 8, a data processing device 9 for evaluating cargo data, and a device for detecting the load of the ship relating to the cargo are connected to the data bas system 5. A ballalst tank is arranged so that weight is generated in the starboard and the port.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for changing the water volume of a ballast tank by a pump to change the draft of a ship.

[0002]

2. Description of the Related Art DE-PS 27 06 885 describes a method for changing the vertical and horizontal inclination of a ship. According to this method, a measurement system is provided for detecting a large number of data, for example, the inclination angle of a ship, the depth of inundation of a ship, and the like. Furthermore, a ballast tank which can be filled with water is provided, and in each case the water level in the ballast tank is also detected by the measuring device. In order to keep the deck of the ship as horizontal as possible, a control is provided, which supplies water to or drains the ballast tank. The supply and withdrawal of this water is provided by a pump.

[0003] A method for detecting the position is disclosed in DE-OS 343.
0765. This method is used for automatic control of the navigation attitude of a ship and stable operation of the ship. In this method, the draft and the side tilt angle of the ship are detected by the measuring system. In this case, the problem is a pure display system that is left to the crew to change based on the detected data of the ship's load.

[0004] These prior methods have not been suitable in a satisfactory manner to apply the small cost of added equipment to ships. According to these methods, a great deal of manual work must be considered, and the most advanced automation systems must have a great deal of additional equipment in addition to the usual ship equipment. .

[0005]

SUMMARY OF THE INVENTION It is, therefore, an object of the present invention to provide a method for varying the draft applicable to ships at a fraction of the cost, even when considerably automated.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a method for changing the water amount of a ballast tank by a pump and changing the draft of a ship. Connect, connect the data bus system to the upper draft control device, and in the data bus system, a draft detection device, a data processing device for evaluating the load data, and a load detection device for the ship structure related to the load. And a ballast tank connected to the ship so that gravity is generated on the starboard and port sides of the ship.

[0007] The method according to the invention relocates the individual equipment components of a ship which are already arranged in defined dimensions. According to the invention, these components need only be interconnected appropriately and inserted through the adaptive drainage control according to the invention. Therefore, in order to carry out the invention, it is only necessary to enable a corresponding data exchange through the data bus system and to realize the pump control so that all the prepared information is used.

It is preferred to use a double bottom tank and side tanks as ballast tanks so that the ship's attitude can be easily changed. In order to distribute the ballast water, the individual ballast tanks are preferably connected to each other by pipes.

[0009] It is preferable to supply and drain water to and from each of the ballast tanks by valve control, and it is preferable to use a pendulum for detecting the lateral inclination angle of the ship. Furthermore, it is preferable to use at least one pressure gauge to detect the amount of water inside the ballast tank.

[0010] In order to prevent damage to the ship due to unacceptable load distribution, it is preferable to compare the structural load obtained from the loaded state with the allowable structural load of the ship structure in a data processing device for the load data.

Preferably, at least one pressure gauge is arranged in the area of the keel for detecting the draft,
It is preferable that the upper control device gives the total water supply amount of the ballast tank.

[0012] The direction of the inclination is preferably provided by a higher-level control device so as to distribute the total water supply to the individual ballast tanks. In order to use all the free parameters to balance the ship's attitude, it is preferred that the superordinate controller provide the lateral and vertical inclination and the depth of flooding of the ship by filling and draining the ballast tank.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram illustrating a connection state of main components mounted on a ship when performing a method according to the present invention. In FIG. 1, a ballast tank 1 is arranged in the area of the bottom / ballast system 2. A bus control device 3 is arranged in the ship bottom / ballast tank system 2. The bus controller 3 is connected to the main computer 4.

A number of components are interconnected through a data bus system 5. These components are:
A pump control device 6, a tank water amount detection device 7, a draft detection device 8, a data processing device 9 for cargo data, and a balance system 10.

The main computer 4 also includes a power generation control device 11, an operation monitoring system 12, a load monitoring system 13, and an operation attitude remote control device 14.
Is connected.

In the ship bottom / ballast tank system 2,
A double bottom tank and side tanks are arranged. These tanks are connected to each other through pipes and remotely controllable valves. The ballast tank 1 is supplied or drained by at least two pumps.

Thus, the ballast water is transferred from one ballast tank 1 to another ballast tank 1 or
Pumping from the surrounding sea to the ballast tank or from the ballast tank to the surrounding sea is possible. Depending on the amount of water supplied or drained each time, the individual ballast tank 1 keeps the ship in a stable position and the draft is adjusted.

FIG. 2 is a cross-sectional view of the hull 15 having the starboard tank 16 and the port tank 17. The starboard and port tanks 16, 17 are both provided with a tank water level detecting device 7. The tanks 16 and 17 are the side tilt pump 1
Water is supplied or drained with the help of 8. Hull 15
In the area of the keel 19, the draft detection device 8 is arranged.

By feeding or draining one or more starboard tanks 16 or one or more port tanks 17, the tilt of the vessel acts in the opposite direction. This can occur, for example, by loading or unloading on only one side of the vessel. The tanks 16 and 17 are connected to each other by a pipe connected to the horizontal tilt pump 18. For example, when the ship is tilted to the starboard side, the pump transfers water from the starboard tank 16 to the port tank 17. If the vessel is tilted in the opposite direction, water will be transferred in the opposite direction. A pendulum is used to detect the side tilt angle. The pendulum can easily detect the inclination of the ship.

[0020] A corresponding system for compensating for tilt is also called an anti-healing system.

The tank water amount detecting device 7 can be constituted by a pressure gauge arranged in the ballast tank 1. In this case, the pressure gauge is arranged at the bottom of the ballast tank 1.
With the help of a pressure gauge, the force generated by the water pressure is converted into an electrical signal. Through the data bus system 5, information on the inside of the tank, such as the amount of water in the tank or the water level, is transmitted.

If necessary, a manual operation on the ballast pump can be performed. Opening and closing of the arranged valves is performed by remote control. The supply and discharge of ballast water is monitored by the tank water volume detector 7.

In the data processor 9 for the load data, the actual load, in particular the position and weight of the container, can be provided. The data processing device 9 calculates the stress in the ship structure from these initial data and compares it with the allowable stress. With the help of the bottom / ballast tank system 2, the resulting stresses can be reconciled.

As the draft detecting device 8, a pressure gauge disposed in the area of the keel 19 is used. A pressure gauge converts water pressure into an electrical signal. Preferably, the pressure gauges are located at the front and rear of the hull. When the signal strength is the same, the two manometers, together with the flat keel 19, are arranged in the horizontal orientation of the vessel. This means that the keel 19 extends parallel to the sea surface.

With the aid of the method according to the invention, it is possible to appropriately provide the total amount of water supplied to the ballast tank 1 as well as the distribution of ballast water to the individual ballast tanks 1. This can be done completely automatically and does not require any manual work. Of course, in the event of a failure, in order to supply and drain water to and from the ballast tank 1 without relying on automatic control, it may additionally be possible to manually supply and drain water.

As described above, according to the present invention, it is only necessary to appropriately interconnect the individual equipment components of an already arranged vessel and insert them through the adaptive drainage control according to the present invention. To do so, it is only necessary to enable a corresponding data exchange through the data bus system and to realize the pump control so that all the prepared information is used. Therefore, the draft can be automatically changed at a lower cost than before.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a connection state of main components mounted on a ship when performing a method according to the present invention.

FIG. 2 is a schematic cross-sectional view of a ship illustrating a possible arrangement of side ballast tanks.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ballast tank 2 Ship bottom / ballast tank system 3 Bus controller 4 Main computer 5 Data bus system 6 Pump control device 7 Tank water amount detection device 8 Draft detection device 9 Data processing device 10 Balance system 11 Power generation control device 12 Operation monitoring system 13 Cargo Monitoring system 14 Operating attitude remote control device 15 Hull 16 Starboard tank 17 Portside tank 18 Side tilt pump 19 Keel

Claims (11)

[Claims] 1. A method for changing the water volume of a ballast tank by a pump and changing the draft of a ship, comprising: connecting a pump control device (6) for the pump to a data bus system (5); ) Is connected to a higher-level draft control device, and the data bus system (5) includes a draft detection device (8), a data processing device (9) for evaluating cargo data, and a ship structure related to cargo. A method, characterized in that a load detection device is connected and the ballast tank (1) is arranged so that gravity is generated on the starboard and port side of the vessel. 2. The method according to claim 1, wherein a double bottom tank and a side tank are used as the ballast tank. 3. The method according to claim 1, wherein the ballast tanks are connected to one another by pipes. 4. The method according to claim 1, wherein the supply and discharge of water to each of the ballast tanks is performed by valve control. 5. The method according to claim 1, wherein a pendulum is used to detect a lateral inclination angle of the vessel. 6. The method according to claim 1, wherein at least one pressure gauge is used to detect the amount of water in the ballast tank. 7. The data processing device (9) for the load data, wherein a comparison is made between a structural load obtained from a loaded state and an allowable structural load of the marine structure. The method according to any of the above. 8. The method according to claim 1, wherein at least one pressure gauge is arranged in the area of the keel for detecting the draft. 9. The method according to claim 1, wherein the higher-level control device supplies the amount of water supplied to the ballast tank (1). 10. The method according to claim 1, wherein the higher-level control device distributes the total water supply to each of the ballast tanks (1). 11. The ship according to claim 1, wherein said upper control device gives a horizontal inclination and a vertical inclination, and a depth of inundation of a ship by supplying and discharging water to and from said ballast tank (1). The method described in.