WO2019000757A1

WO2019000757A1 - Method for adding water in vessel lightering

Info

Publication number: WO2019000757A1
Application number: PCT/CN2017/108833
Authority: WO
Inventors: 郭建杰; 张光锋; 刘宗强; 吕岩
Original assignee: 广船国际有限公司
Priority date: 2017-06-27
Filing date: 2017-10-31
Publication date: 2019-01-03
Also published as: CN107264728B; CN107264728A

Abstract

A method for adding water in vessel lightering: under the premise that the bow of a vessel is not loaded with ballast water, the vessel is lightered onto a semisubmersible barge; the semisubmersible barge is moved to a deep pit and the vessel is driven to dive to two draught depths until the semisubmersible barge dives to the point of separation from the vessel; whenever the vessel dives to one draught depth, a submersible pump of the semisubmersible barge loads ballast water of a volume corresponding to the draught depth into a ballast tank at the bow of the vessel; and when the semisubmersible barge dives to the point of separation from the vessel, the vessel is towed out of the semisubmersible barge. When the semisubmersible barge cannot implement vessel lightering with fully loaded ballast water, by lightering the vessel not loaded with ballast water directly onto the semisubmersible barge, then when the vessel is driven by the semisubmersible barge to dive to a certain depth and the weight of the vessel is shared by utilizing the buoyancy of water, ballast water is then loaded into the ballast tank at the bow of the vessel until the semisubmersible barge dives to the point of separation from the vessel, the need for changing to a relatively small semisubmersible barge is obviated for implementing vessel launching.

Description

Method for adding water in ship docking

Technical field

The invention relates to the technical field of ships, and in particular to a water adding method in ship docking.

Background technique

Semi-submersible ships (Semi-submersible ships) are also semi-submersible mother ships. They are specialized in transporting large offshore oil rigs, large ships, submarines, gantry cranes, prefabricated bridge components, etc. Special marine vessels for large equipment.

When working at a semi-submersible, like a submarine, by adjusting the amount of ballast water in the hull, it is possible to smoothly sneak a football field-sized hull deck into the underwater water of 10 to 30 meters, revealing only the ship building, and then Shipped goods (such as yachts, submarines, barges, rigs, etc.) can be towed above the loading deck that has been submerged.

At present, in the process of launching the ship in the flat land, in order to adjust the level of the ship, the ship needs to load the ballast water in advance to the ballast tank of the ship before launching, and transfer it to the semi-submersible barge. The semi-submersible barge is dive in the pontoon pit to realize the launching of the ship.

However, due to the large inclination of the ship design, in order to adjust the balance, large ships (ships of more than 50,000 tons) need to load about 5000-8000T ballast water in the stern of the ship, but the following problems exist:

1. Usually, a plurality of docking piers are provided between the crotch and the semi-submersible barge of the ship to support the stern of the ship with ballast water to avoid deformation of the hull due to the above 5000-8000T ballast water. However, when the semi-submersible is reversing, the semi-submersible bar does not have enough space to place enough docks to support the ship's crotch, resulting in the ship not being able to pass the water.

2. When the semi-submersible barge has a small displacement or a length smaller than that of the launching ship, it will cause the ballast of the crotch to exceed the semi-submersible capacity and the ship cannot be transferred. In order to realize the launching of the ship, it is necessary to replace the larger semi-submersible barge. Serious waste of time and cost.

Summary of the invention

The object of the present invention is to provide a water adding method in a ship barge to solve the problem that the existing large ship cannot pass the water after loading the ballast water.

The object of the present invention is to provide a water adding method in a ship barge, and also solve the problem of time and cost waste caused by the existing large ship to realize the replacement of a larger semi-submersible barge by the ship.

To this end, the present invention employs the following technical solutions:

A method of adding water in a ship's transfer, comprising the following steps:

Passing the ship to the semi-submersible bar on the premise that the ballast water is not loaded on the top of the ship;

Moving the semi-submersible bar to the sinkhole and driving the ship to dive at least two drafts in sequence until the semi-submersible dive down to separate from the ship;

When the vessel dives to a draft level, the semi-submersible submersible pump loads ballast water corresponding to the draft water depth into the ballast tank of the ship's crotch;

After the semi-submersible dive down to separate from the vessel, the vessel is towed out of the semi-submersible barge.

Preferably, before the ship is transferred to the semi-submersible bar, it further comprises:

Arranging a plurality of hoses, cranes and generators on the deck surface of the ship;

And, a plurality of cable pilings and a semi-submersible tooling platform on which the submersible pump is placed are arranged on the semi-submersible bar.

Preferably, after the ship is transferred to the semi-submersible, before moving the semi-submersible to the sinkhole, the method further comprises:

Connecting the crane and the submersible pump to the generator through a pipeline;

Connecting a plurality of sections of hose on the deck surface and connecting one end of the connected hose to a ballast tank of the vessel;

The other end of the connected hose is hoisted to the semi-submersible tooling platform by the crane and connected to the submersible pump.

Preferably, when the number of ballast tanks of the ship is greater than one, a water dividing tank is disposed on the deck surface, and ballast water is separately loaded to the plurality of ballast tanks through the water dividing tank.

Preferably, after the last loading of the ballast water, the hose connected to the submersible pump is removed and the pipeline connecting the submersible pump to the generator is removed, and the hose is suspended by the crane On the deck surface, a pipeline is hoisted to the semi-submersible tooling platform.

Preferably, the bollard piles are provided in plurality, respectively symmetrically arranged at the crotch portion of the semi-submersible ship at a predetermined position of the ship and at a distance of 1 m from the outer plate of the ship.

Preferably, the semi-submersible tooling platform is connected with a water pump hanging basket, and the submersible pump is placed in the water pump hanging basket.

Preferably, the submersible pump has a power of 702 kW, a head of 32 meters, and a flow rate of 800 square meters per hour.

Preferably, before the ship is transferred to the semi-submersible bar, the method further comprises:

Calculating the total amount of water loaded on the ship's ballast water, and calculating the position at which the ship dive at least two drafts, and calculating the amount of ballast water required to load each draft.

The invention can directly use the semi-submersible ship to dive to a certain depth when the semi-submersible bar cannot directly realize the ship that is filled with the ballast water, and the ship is not loaded with the ballast water directly to the semi-submersible barge. After the buoyancy of the water shares the gravity of the ship, the ballast water is loaded into the ballast tank of the ship's crotch until the semi-submersible dive to separate from the ship, and the ship can be launched without replacing the relatively small semi-submersible barge.

DRAWINGS

Figure 1 is a flow chart of a water adding method in a ship barge of the present invention;

Figure 2 is a schematic view of the ship of the present invention placed on a semi-submersible bar;

3 is a schematic view of a semi-submersible tooling platform of the present invention equipped with a water pump hanging basket and a submersible pump;

Figure 4 is an enlarged view of a portion A of Figure 2 of the present invention.

In the picture:

1, crotch; 2, hose; 3, crane; 4, semi-submersible tooling platform; 5, ballast tank; 6, water tank; 41, submersible pump; 42, pump basket; 51, 2 pressure Carrier; 52, No. 1 ballast tank.

Detailed ways

The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

The invention provides a water adding method in a ship docking. As shown in FIG. 1 , the water adding method in the ship passing includes the following steps:

S10. Under the premise that the ballast water is not loaded on the top of the ship, the ship is transferred to the semi-submersible barge.

That is to say, the ship is unloaded to the semi-submersible barge, so that a relatively small semi-submersible barge can also achieve the purpose of smoothing the larger ship. The no-loading method does not require too many docks to support the stern of the ship, and thus does not require too much docking space.

In this step, before the ship is transferred to the semi-submersible barge, the corresponding tooling needs to be arranged on the deck surface of the ship and on the semi-submersible barge in advance.

Specifically, as shown in FIG. 2, a plurality of sections of hoses 2, cranes 3 and generators are arranged on the deck surface of the ship, and a semi-submersible tooling platform 4 is arranged on the semi-submersible barges, and the semi-submersible tooling platform 4 is arranged on the semi-submersible tooling platform 4 A submersible pump 41 and associated auxiliary tooling tools are placed thereon. The plurality of sections of hose 2 can be arranged symmetrically on both sides of the vessel, and then the crane 3 can be arranged at a position where the hose 2 can be hoisted, the generator being arranged on the submersible pump 41 which can be connected to the crane 3 and the semi-submersible position. The semi-submersible tooling platform 4 is provided in two and symmetrically disposed on both sides of the ship to facilitate the connection of the hose 2 on the ship to the submersible pump 41 and the connection of the line on the submersible pump 41 to the generator. In the embodiment, the hose 2 is a rubber hose. Specifically, the rubber hose is provided with flanges and lifting codes at both ends, and the specifications are set to be 8 meters, 6 meters and 2 meters long as required.

In the present embodiment, the crane 3 is generally a crane 3 for hoisting equipment provided by the ship itself. Therefore, when the ship itself has the crane 3, the hose 2 and the like can be performed by the own crane 3. Lifting work of the tool. When the ship itself does not have the crane 3, it is necessary to hoist the car crane at the appropriate position of the ship to carry out the lifting of the hose 2 and the tools.

In this embodiment, referring to FIG. 3, the semi-submersible tooling platform 4 is connected with a water pump basket 42, and the submersible pump 41 is placed in the water pump basket 42. The submersible pump 41 has a power of 702 KW, a head of 32 meters, and a flow rate of 800 square meters per hour. By using the high-power submersible pump 41, the time for loading the ballast water can be shortened, and the use time of the semi-submersible barge is greatly saved, and the rental cost can be saved for the case of renting the semi-submersible barge.

After the ship is unloaded to the semi-submersible barge, the submersible pump 41 and the crane 3 need to be respectively connected to the generator through the pipeline, and the above-mentioned multi-segment hoses 2 are connected, and then the connected hoses are One end of the total length hose), that is, one end of the ballast tank 5 near the ship's crotch portion 1, is connected to the ballast tank 5, and the other end of the connected hose is lifted by the crane 3 to the semi-submersible tooling platform 4, It is connected to the submersible pump 41 above it.

In this step, the ship may have a plurality of ballast tanks 5, and in order to reduce the piping arrangement of the hoses 2, a water dividing tank 6 (shown in FIG. 4) may be disposed on the deck surface of the ship. Specifically, the A butterfly valve is disposed on the water dividing tank 6. Each of the ballast tanks 5 is connected to the hose 2 through the water dividing tank 6, and the ballast water supplied from the submersible pump 41 can be controlled by the butterfly valve of the water dividing tank 6, and the ballast water can be separately loaded to the respective ballast tanks 5. By providing the water dividing tank 6, it is possible to control the watering control of the plurality of ballast tanks 5 without the cooperation of the cranes 3.

S20. Move the semi-submersible barge to the sinkhole, and drive the ship to dive at least two drafts in turn until the semi-submersible dive to separate from the ship.

After the ship is unloaded to the semi-submersible bar at step S10 and the hose 2 is connected to the submersible pump 41 and the submersible pump 41 is connected to the engine, the semi-submersible barch will move the ship to the sinking position and will drive the ship. Dive at least two drafts. Specifically, the draft depth is calculated according to data parameters of the ship and the semi-submersible bar. In this embodiment, at least two drafts of the ship are respectively set to the first draft depth, the second draft depth, and the Nth draft. And the final draft (ie the final launch depth of the ship). In this embodiment, the draft of each ship is set to at least two according to the parameters of the ship. While calculating the above draft, the total amount of water loaded by the ship's ballast water is calculated. After the total water reaches the calculated value, the semi-submersible bar continues to dive to enable the ship to escape from the semi-submersible.

S30. When the ship dives to a draft level, the semi-submersible submersible pump loads the ballast water corresponding to the depth into the ballast tank of the ship's crotch.

When the semi-submersible bar moves the ship to the sinkhole and dive to the first draft of the ship, the buoyancy of the water can be used to share the ship's gravity, and the submersible pump 41 is loaded into the ballast tank 5 of the ship's raft 1 The first draft is corresponding to the amount of water ballast water. After loading the ballast water corresponding to the first draft depth, the semi-submersible bar drives the ship to dive to the second draft of the ship, and loads it into the ballast tank 5 of the ship's raft 1 through the submersible pump 41. The second draft is corresponding to the amount of water ballast water. By analogy, the last time the ballast water is loaded, then the semi-submersible dive to separate from the ship and the ship is completely launched.

It should be noted that after the last loading of the ballast water, before the semi-submersible dive to separate from the ship, it is necessary to remove the hose 2 connected to the submersible pump 41 and the pipeline connecting the submersible pump 41 to the generator. The hose 2 is hoisted to the deck surface by the crane 3, and the pipeline is hoisted to the semi-submersible tooling platform 4 to facilitate the separation of the ship and the semi-submersible barge.

S40. After the semi-submersible dive to separate from the ship, the ship is towed out of the semi-submersible barge.

After the semi-submersible bar is separated from the ship, the ship needs to be pulled out of the semi-submersible barge and docked at the dock. In order to prevent the ship from colliding with the relevant tooling when it is pulled out of the semi-submersible barge, in the embodiment, a plurality of cable guiding piles are arranged on the semi-submersible barge, and the specific plurality of cable guiding piles are symmetrically arranged in the predetermined position of the ship of the semi-submersible barge. The head 1 and the outer plate of the ship are 1 meter away. The predetermined position of the above-mentioned ship transfer refers to the position where the ship is moved to the semi-submersible bar. Through a plurality of guide bollards, the semi-submersible barge can be pulled out more stably when the ship is pulled out without excessive shaking. In this embodiment, four or six guide bollards are provided.

The following method is used to transfer the 50,000-ton ship (with two ballast tanks) to the semi-submersible bar as an example:

First, the 50,000-ton ship needs to be transferred to the semi-submersible bar under no-load (ie, no ballast water is loaded), and after the 50,000-ton ship moves to the semi-submersible barge, the semi-submersible barge moves the ship to the sinkhole. The semi-submersible barge begins to dive, and after dive to 50,000 tons of ship draught 2 meters - 2.5 meters (that is, the first draft depth), through the submersible pump 41 to the No. 2 ballast tank 51 of the ship's 艏 1 Oil tank) add water 3165.9T, continue to dive after adding water to 50,000 tons of ship draught 2.5 m-3 m (ie the final draft depth), add water to the No. 1 ballast tank 52 (cargo tank) through submersible pump 41 2680T, after adding water, the hoses 2 and pipelines will be removed. Then the semi-submersibles will continue to dive to separate from the 50,000 tons of ships. When the 50,000 tons of ships are detached, the floating state will be 4.5 meters of draft water, and then 50,000 tons. The ship pulled out the semi-submersible barge.

It is apparent that the above-described embodiments of the present invention are merely illustrative of the present invention and are not intended to limit the embodiments of the present invention. Other variations or modifications of the various forms may be made by those skilled in the art in light of the above description. There is no need and no way to exhaust all of the implementations. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the invention are intended to be included within the scope of the appended claims.

Claims

A method for adding water in a ship's barge, characterized in that it comprises the following steps:

Passing the ship to the semi-submersible bar on the premise that the ballast water is not loaded on the top of the ship;

Moving the semi-submersible bar to the sinkhole and driving the ship to dive at least two drafts in sequence until the semi-submersible dive down to separate from the ship;

When the vessel dives to a draft level, the semi-submersible submersible pump loads ballast water corresponding to the draft water depth into the ballast tank of the ship's crotch;

After the semi-submersible dive down to separate from the vessel, the vessel is towed out of the semi-submersible barge.
The method of adding water according to claim 1, wherein before the ship is transferred to the semi-submersible, the method further comprises:

Arranging a plurality of hoses, cranes and generators on the deck surface of the ship;

And, a plurality of cable pilings and a semi-submersible tooling platform on which the submersible pump is placed are arranged on the semi-submersible bar.
The method of adding water according to claim 2, wherein after moving the vessel to the semi-submersible, moving the semi-submersible to the sinkhole further comprises:

Connecting the crane and the submersible pump to the generator through a pipeline;

Connecting a plurality of sections of hose on the deck surface and connecting one end of the connected hose to a ballast tank of the vessel;

The other end of the connected hose is hoisted to the semi-submersible tooling platform by the crane and connected to the submersible pump.
A water adding method in a ship barge according to claim 3, wherein when the number of ballast tanks of the ship is greater than one, a water dividing tank is disposed on the deck surface, and the water dividing tank is passed through Ballast water is loaded in each of the multiple ballast tanks.
The method of adding water in a ship barge according to claim 4, characterized in that After loading the ballast water a second time, the hose connected to the submersible pump is removed and the pipeline connecting the submersible pump to the generator is removed, and the hose is suspended from the deck by the crane , the pipeline is hoisted to the semi-submersible tooling platform.
The water adding method in a ship barge according to any one of claims 3-5, wherein the wire guide pile is provided in plurality, respectively symmetrically arranged at a predetermined position of the semi-submersible ship The head and the outer and outer plates of the ship are 1 meter away.
The water adding method in a ship barge according to claim 6, wherein a pump hanging basket is connected to the semi-submersible working platform, and the submersible pump is placed in the water pump hanging basket.
The method of watering a ship in a ship according to claim 7, wherein the submersible pump has a power of 702 kW, a head of 32 meters, and a flow rate of 800 square meters per hour.
The method of adding water according to claim 1, wherein before the ship is transferred to the semi-submersible, the method further comprises:

Calculating the total amount of water loaded on the ship's ballast water, and calculating the position at which the ship dive at least two drafts, and calculating the amount of ballast water required to load each draft.