Dissembling method for vessel and dissembling device

Abstract

To safely and efficiently dissemble a super large-size vessel by landing in a simple structure, with ease, and safety.SOLUTION: A method for dissembling a vessel including a first dock 10 provided with a freely opened / closed gate 2, a second dock 20 composed by arranging a lifting bottom surface 21 of a vessel 1 in a higher position than a dock bottom surface 11 of the first dock 10, a feed water pump 4 for supplying sea water, a drain mechanism 5 placing the vessel 1 on the lifting bottom surface 21 by draining the sea water in the second dock 20, and a dismantling mechanism 30 for cutting up the vessel 1 includes: a docking process for docking the vessel 1 into the first dock 10 with inner water surface level of the first dock 10 to be sea water surface level of the ocean by opening the gate 2; a raising process for raising the vessel 1 by raising the inner water surface level by supplying sea water after closing the gate 2; a moving process for the vessel moving the vessel to the second dock 20 by floating; a draining process for loading the vessel 1 on a lifting bottom surface 21 by draining the sea water in the second dock 20 by a draining mechanism 5; and a cutting process for cutting the vessel 1 by the dismantling mechanism 30.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a dismantling method and apparatus for cutting and dismantling a large ship. [Background technology]

[0002] Currently, there is a strong demand for an efficient device and method for dismantling large, aging ships, while ensuring the safety of workers and preventing pollution from waste materials such as asbestos and heavy oil that are generated during dismantling. This is because large ships are transported to underdeveloped countries such as Bangladesh, where they are moved up the coast at high tide by taking advantage of the slow flow of the sea, and then dismantled by cutting the ships with torches and other tools, which requires a great deal of work by many workers. This does not guarantee the safety of the workers, does not prevent pollution from waste materials, and does not allow the large ships to be dismantled efficiently. Dismantling ships using this method does not ensure the safety of workers or prevent the release of environmentally polluting substances to the outside, and this is an international issue.

[0003] A method for dismantling a ship is disclosed in Patent Document 1, and this method involves dismantling a large ship through the following steps. (1) The watertight gate of the No. 1 dock is opened and the large ship is floated into seawater and docked in the No. 1 dock. (2) The seawater in the first dock is then drained, and the large ship is placed on the bottom plate of the first dock and divided into two halves, front and rear. (3) Then, the watertight gate of the first dock is opened to let in seawater, the divided vessel is floated on the seawater, and the divided vessel is discharged from the first dock together with the seawater. (4) The smaller ships that have been divided into smaller pieces are placed on an upwardly sloping landing surface and lifted out of the seawater. (5) Dismantling the salvaged divisional vessels.

[0004] Furthermore, Patent Document 2 discloses a dismantling device that includes a pier adjacent to a dock and an ark that can be introduced into the dock and that moves a ship up and down while loading it. As shown in Figures 5 to 10, the ark moves up and down by adjusting its own buoyancy, and lifts the ship loaded on it to a position where it can be dismantled. This dismantling device was developed with the aim of solving the problems of conventional dismantling, in which a ship is sailed to Bangladesh, India, etc., and then sailed to a beach for dismantling. Conventional dismantling on the beach is carried out by workers cutting the hull at the beach site, but this method has the disadvantage that it requires high transportation costs to sail the hull from all over the world to Southeast Asia. Furthermore, dismantling on the beach by workers does not solve the above-mentioned problems, namely, harmful waste such as asbestos and oil is not properly treated and is disposed of, polluting the environment, and problems for workers and the local environment are not solved, and fatal accidents have occurred during the dismantling work of ships on the beach.

[0005] Instead of dismantling on the beach, it is possible to moor the ship to a quay and dismantle it from the quay using heavy dismantling equipment such as cranes, but this dismantling method does not solve the problem of seawater pollution caused by the waste generated during dismantling being dumped into seawater. Furthermore, this dismantling method has various drawbacks, such as the difficulty of ensuring safety and efficient dismantling, when dismantling a ship by floating it on seawater. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Special Publication No. 2015-533359 [Patent Document 2] WO2007 / 081198 publication Summary of the Invention [Problem to be solved by the invention]

[0007] In the dismantling of a ship according to Patent Document 1, the watertight gate at the entrance is opened, the large ship is docked together with seawater in the first dock, the watertight gate of the first dock is then closed, seawater is drained from the first dock, the large ship is placed on the bottom of the first dock, and the ship is divided into two pieces while floating on the seawater, and then the watertight gate is opened again to let seawater into the first dock, the divided ships, which have been divided and reduced to half their total length, are floated on the seawater and pulled out of the first dock, and the divided ships, which have been pulled out of the first dock and are floating on the seawater with their total length reduced to half, are moved above the landing bottom with an upward slope, and then the divided ships are pulled up to the landing bottom with a wire or the like and dismantled, which is a drawback in that it takes a lot of time to pull the ship up to land. In the above dismantling, the divided ships of a large ship divided into two are pulled up to the landing bottom with an upward slope, but there is a problem that the divided ships are considerably large and heavy, and large equipment, energy, and costs are required to pull up the landing bottom. For example, there are about 800 VLCCs (very large crude carriers) sailing around the world, and many of them are large oil tankers of over 200,000 tons, with a total length of 330 m. The total length of the divided ships exceeds 150 m, so it is extremely difficult to pull them up to the landing base, and it is also extremely difficult to safely and efficiently dismantle the large divided ships that have been pulled up to the landing base. Furthermore, since the divided ships are floated on seawater and moved from the first dock to the landing base, the division work of the ship needs to be done while taking into consideration that the divided ships will float on seawater. Therefore, there is a drawback that the division of the ship requires time and skill, and it is not easy and quick. Another problem is that waste and wastewater generated when dividing and moving the ship in two will flow out and pollute the seawater. Even when the divided ships are dismantled by pulling them up to the landing base, it is extremely difficult to solve the problem that waste such as vests and heavy oil generated during the dismantling flow into the sea from the landing base, which is on a downward slope, and pollute the seawater.

[0008] Furthermore, in Patent Document 2, a ship is loaded onto a box installed in a dock and lifted to a dismantling position. The box adjusts its own buoyancy to move up and down to lift the ship, so in order to lift an ultra-large, long and heavy ship, a structure is required to move the considerably large, long and heavy box up and down using buoyancy. Since ultra-large ships have a hull length of 300m and a width of 60m, a box for lifting this ship is required to have a long length, wide width and large buoyancy, which makes it impossible to solve the problem of considerably high equipment costs.

[0009] The present disclosure has been developed with the objective of further eliminating the above-mentioned drawbacks, and one of the objectives of the present disclosure is to provide a ship dismantling method and apparatus which can prevent environmental destruction caused by seawater pollution while dismantling a ship, and which can lift the ship with a simple structure and dismantle the ship safely and efficiently. [Means for solving the problem]

[0010] A method for dismantling a ship according to one embodiment of the present invention includes cutting and dismantling the ship using a first dock having a gate that can be opened and closed at the entrance of the ship, a second dock that is connected to the first dock and has a lifting bottom that lifts the ship to a position higher than the dock bottom of the first dock, a water supply pump that supplies seawater to the first dock and the second dock, a drainage mechanism that drains seawater from the second dock and places the ship on the lifting bottom to put the second dock in a drained state, and a dismantling mechanism that cuts up the ship in the second dock that has been drained by the drainage mechanism and put into a drained state. The ship dismantling method includes a ship docking process in which the gate is opened and the ship is docked in the first dock with the inland water level (WLin) of the first dock set as the seawater level (WLout) of the ocean; a seawater raising process in which, while the ship is docked in the first dock in the docking process, the gate is closed and a water supply pump supplies seawater to the first dock and the second dock to raise the inland water level (WLin) of the first dock and the second dock to lift the ship; a ship moving process in which, while the ship is lifted in the seawater raising process, the ship is floated on the seawater and moved from the first dock to the second dock; a seawater draining process in which, after the ship is moved to the second dock in the ship moving process, the seawater of the second dock is drained by a draining mechanism and the ship is placed on a lifting bottom to put the second dock in a drained state; and a ship cutting process in which the ship placed on the lifting bottom of the second dock in a drained state is cut by a dismantling mechanism.

[0011] A ship dismantling device according to another embodiment of the present invention includes a first dock having a gate at an entrance for docking a ship, a second dock connected to the first dock and having a lifting bottom disposed at a position higher than the dock bottom of the first dock, a water supply pump that supplies seawater to the first dock and the second dock with the gate in a closed state to raise the inland water level (WLin) of the first dock and the second dock higher than the sea water level (WLout), a drainage mechanism that places a ship on the lifting bottom while placing the second dock in a drained state, a dismantling mechanism that cuts up the ship placed on the lifting bottom of the second dock in the drained state, and a water supply pump and drain mechanism that operate to open and close the gate, and a control mechanism for controlling the operation of the water mechanism, wherein the control mechanism opens the gate so that the ship is docked in the first dock, closes the gate and sets the water supply pump in operation so that the water supply pump supplies seawater to the dismantling dock and the second dock, causing the inland water level (WLin) of the first dock and the second dock to rise higher than the sea water level (WLout) so that the ship floats on the seawater and is moved from the first dock to the second dock, the control mechanism closes the gate and sets the water drainage mechanism in operation so that the second dock places the ship on its lifting bottom and is put into a drainage state, and the dismantling mechanism dismantles the ship placed on the lifting bottom of the second dock in the drainage state. Effect of the Invention

[0012] The above-mentioned ship dismantling method and apparatus have the advantage that the ship can be dismantled while preventing environmental damage caused by seawater pollution, and that the ship can be lifted to a position where it can be dismantled efficiently and safely with a simple structure. [Brief description of the drawings]

[0013] [Figure 1] 1 is a schematic perspective view of a ship dismantling device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic perspective view of the second dock of FIG. 1; [Diagram 3] FIG. 13 is a schematic perspective view showing a dismantling mechanism disposed in a second dock. [Figure 4] FIG. 2 is a schematic vertical cross-sectional view of a ship dismantling device, showing the state in which a ship is docked in the first dock. [Diagram 5]This is a schematic vertical cross-sectional view showing a ship docked in the first dock. [Figure 6] FIG. 2 is a schematic vertical cross-sectional view showing the state in which seawater is supplied to the first dock and the second dock to raise a ship and move it to the second dock. [Figure 7] 1 is a schematic vertical cross-sectional view showing the state in which seawater is discharged from the second dock and the ship is placed on the lifting bottom of the second dock to be dismantled. FIG. [Figure 8] FIG. 2 is a schematic vertical cross-sectional view showing an example of a second dock. [Figure 9] FIG. 11 is a schematic vertical cross-sectional view showing another example of the second dock. [Figure 10] FIG. 11 is a schematic perspective view of a ship dismantling apparatus according to another embodiment of the present invention. [Figure 11] 11 is a schematic vertical cross-sectional view showing a state in which a ship has been docked in the first dock of FIG. 10. FIG. [Figure 12] FIG. 12 is a schematic vertical cross-sectional view showing a state in which the entrance to the first dock in FIG. 11 is closed by a gate, seawater is supplied to the first dock and the second dock, and the ship is lifted and moved to the second dock. [Figure 13] 13 is a schematic vertical sectional view showing a state in which seawater is discharged from the second dock in FIG. 12 and the ship is placed on the lifting bottom surface of the second dock for dismantling. FIG. [Figure 14] FIG. 11 is a schematic perspective view of a ship dismantling apparatus according to another embodiment of the present invention. [Figure 15] FIG. 11 is a schematic perspective view of a ship dismantling apparatus according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] A method for dismantling a ship according to one embodiment of the present disclosure includes a first dock having a gate that can be opened and closed at the entrance of the ship, a second dock that is connected to the first dock and has a lifting bottom disposed at a position higher than the dock bottom of the first dock, a water supply pump that supplies seawater to the first dock and the second dock, a drainage mechanism that drains seawater from the second dock and places the ship on the lifting bottom of the second dock in a drained state, and a dismantling mechanism that cuts up the ship placed on the lifting bottom of the second dock. This method includes a docking process for a ship in which the gate is opened and the inland water level (WLin) of the first dock is set to the sea water level (WLout) of the ocean, and a docking process for dismantling the ship. The process includes a seawater raising process in which, with the ship docked in the first dock, the gates are closed and seawater is supplied to the first and second docks to raise the inland water level (WLin) of the first and second docks and lift the ship floating on the seawater; a ship moving process in which, after the ship has been moved to the second dock in the seawater raising process, the ship is moved from the first dock to the second dock while floating on the seawater; a seawater draining process in which, after the ship has been moved to the second dock in the ship moving process, the seawater in the second dock is drained by a draining mechanism and the ship is placed on the lifting bottom of the second dock in a drained state; and a ship cutting process in which the drained ship placed on the lifting bottom of the second dock is cut up by a dismantling mechanism.

[0015] The above-mentioned ship dismantling method has the advantage that a large ship can be dismantled efficiently by smoothly lifting it onto the bottom with a simple structure. This is because the above dismantling method involves opening the gate, floating the ultra-large ship on seawater and docking it in the first dock, then closing the gate and supplying seawater to the first and second docks to lift the ultra-large ship while it is floating on seawater, so that an extremely large ship can be lifted using buoyancy with a water supply pump, and the ship lifted in seawater is moved from the first dock to the second dock while floating on seawater, so that the ship can be moved smoothly from the first dock to the second dock with little energy, and once the ship is floating on seawater and moved onto the lifting bottom, the gate is closed and seawater is forcibly drained from the first and second docks so that the ship can be landed on the lifting bottom, so that an extremely heavy ultra-large ship can be landed smoothly on the lifting bottom with little energy, and by dismantling the ship by landing it rather than while it is floating on seawater, ultra-large ships can be dismantled efficiently in a short time and safety can be ensured during the dismantling work. The above ship dismantling method is characterized by the fact that the ship is dismantled by landing it on the lifting bottom within the area designated as the second dock, preventing the outflow of hazardous waste liquids discharged from the dismantled ship into the ocean and preventing environmental damage due to seawater pollution. The above ship dismantling method does not require a large lifting mechanism for lifting the super-large ship, or a large landing mechanism for landing it, and in the case of a ship that can sail under its own power, does not require a large moving mechanism for moving it. It can efficiently dismantle extremely heavy super-large ships by moving them to the lifting bottom with an extremely simple structure, and can also significantly reduce the equipment costs required for dismantling and the dismantling costs. The above method is characterized by the fact that the ship can be efficiently dismantled by shortening the time for dismantling the ship and the time that the ship occupies the second dock. In addition, by making the bottom of the second dock higher than that of the first dock, the costs of excavation and soil disposal in the second dock can be suppressed and reduced, and the construction period can be shortened, resulting in low costs.

[0016] In a ship dismantling method according to another embodiment of the present disclosure, the first dock and the second dock are arranged in a straight line in the fore-aft direction of the ship, and in the moving step, the ship can be moved in the fore-aft direction from the first dock to the second dock. The above-mentioned dismantling method has a feature that the ship can be moved smoothly and safely from the first dock to the second dock by moving the ship straight in the traveling direction (forward or backward), and can be dismantled efficiently and safely. Note that arranging the first dock and the second dock in a straight line in the fore-aft direction of the ship refers to an arrangement in which the ship can be moved in the fore-aft direction from the first dock to the second dock, and includes a diagonal forward or backward direction within the range in which the ship can travel. It also includes a case in which the width (short side) of either the first dock or the second dock is wider than the width (short side) of the other, and a part of either one is arranged in a straight line with the other in the fore-aft direction of the ship.

[0017] In another embodiment of the present disclosure, a ship dismantling method can be performed by arranging the first dock and the second dock adjacent to each other in a parallel position, and by moving the ship in the width direction in the moving step, the ship can be moved from the first dock to the second dock. The above dismantling method has a feature that the moving distance of the ship can be shortened in the moving step by arranging the first dock and the second dock adjacent to each other in a parallel position in the width direction of the ship, and the surfaced ship can be moved smoothly and safely with little energy without difficulty. The above dismantling method also has a feature that the total length (longitudinal direction) of the dock to be dismantled can be shortened, dismantling according to the topography can be performed, and the options for the dismantling location can be expanded. Note that arranging the first dock and the second dock adjacent to each other in a parallel position refers to an arrangement in which the ship can be moved in the width direction from the first dock to the second dock, and includes a case in which the first dock and the second dock have adjacent parts in the width direction of the ship, a case in which the first dock and the second dock are moved in the front-rear direction together with the width direction of the ship (or in stages), and a case in which the first dock and the second dock are arranged in a substantially parallel position. This also includes cases where the length of the long side or short side of either the first dock or the second dock is longer than the length of the other, and where a part of one is adjacent to the other and arranged in a parallel position.

[0018] In a ship dismantling method according to another embodiment of the present disclosure, the lifting bottom surface is inclined downwardly toward the boundary with the first dock, and waste liquid from the ship being dismantled can be made to flow down toward the first dock and discharged to the outside. The above dismantling method has the features that various waste liquids discharged from the ship being dismantled, such as water and waste oil remaining in the ship, can be naturally allowed to flow downwardly, or encouraged to flow downward, guided in a predetermined discharge direction or place, and discharged from a predetermined discharge route, and can perform appropriate wastewater and waste oil treatment, can suppress dirt inside the dock and keep it clean, and can suppress work interference and perform dismantling efficiently and safely.

[0019] In a ship dismantling method according to another embodiment of the present disclosure, a drain for waste liquid from the ship is provided at the boundary between the second dock and the first dock, and the waste liquid can be discharged through the drain. The above-mentioned dismantling method has the features that various waste liquids discharged from the ship being dismantled, such as water and waste oil remaining in the ship, can be guided in a predetermined discharge direction and discharged from a predetermined discharge path, the waste water and waste oil can be appropriately treated, dirt inside the dock can be suppressed and kept clean, and the disturbance of work can be suppressed, allowing efficient and safe dismantling.

[0020] In a ship dismantling method according to another embodiment of the present disclosure, the lifting bottom of the second dock can be inclined downward in the width direction of the ship, and waste liquid flowing down the side or center of the lifting bottom can be discharged. The above-mentioned dismantling method has the features that various waste liquids discharged from the ship being dismantled, such as water and waste oil remaining in the ship, can be guided in a predetermined discharge direction and discharged from a predetermined discharge path, and that appropriate wastewater and waste oil treatment can be performed, dirt inside the dock can be suppressed and kept clean, and that dismantling can be performed efficiently and safely by suppressing work interference.

[0021] A ship dismantling device according to another embodiment of the present disclosure comprises a first dock having a gate at an entrance for docking a ship, a second dock connected to the first dock and having a lifting bottom positioned at a higher position than the dock bottom of the first dock, a water supply pump that supplies seawater to the first dock and the second dock with the gate in a closed state, thereby raising the inland water level (WLin) of the first dock and the second dock higher than the sea water level (WLout), a drainage mechanism that places a ship on the lifting bottom with the gate in a closed state and the second dock in a drained state, a dismantling mechanism that cuts up the ship placed on the lifting bottom of the second dock in the drained state, and a control mechanism that controls the opening and closing of the gate and the operation of the water supply pump and the drainage mechanism. The control mechanism opens the gate and allows the ship to enter the first dock, closes the gate and operates the water supply pump, which supplies seawater to the first and second docks, the inland water level (WLin) of the first and second docks is raised higher than the sea water level (WLout) by the supplied seawater, the ship floating on the seawater is moved from the first dock to the second dock, the control mechanism operates the drainage mechanism, the second dock places the ship on its lifting bottom and is put into a drainage state, and the dismantling mechanism dismantles the ship placed on the lifting bottom of the second dock in the drainage state.

[0022] The ship dismantling equipment described above has the advantage of being able to lift large ships smoothly and land them on the bottom for efficient dismantling with a simple structure. This is because, in the above dismantling equipment, the gate is opened, the super-large ship is floated on seawater and docked in the first dock, the gate is closed and seawater is supplied to the first and second docks to lift the super-large ship while floating on seawater, so that the extremely large ship can be lifted using buoyancy with the water supply pump, and the ship lifted in seawater is moved from the first dock to the second dock while floating on seawater, so that the ship can be moved smoothly from the first dock to the second dock with little energy, and again, in the state where the ship is floating on seawater and moved onto the lifting bottom, the gate is closed and seawater is forcibly drained from the first and second docks so that the ship can be landed on the lifting bottom, so that the extremely heavy super-large ship can be landed smoothly on the lifting bottom with little energy, and by dismantling the ship by landing it rather than floating on seawater using the dismantling mechanism, the super-large ship can be dismantled efficiently in a short time and safety can be ensured during the dismantling work. The above ship dismantling equipment is characterized by being able to prevent harmful waste liquids discharged from dismantled ships from being discharged into the ocean by dismantling them on the lifting bottom within the area designated as the second dock, thereby preventing environmental destruction due to seawater pollution. The above ship dismantling equipment does not require a large lifting mechanism for lifting ultra-large ships, a large landing mechanism for landing them, and in the case of ships that can sail under their own power, does not require a large moving mechanism for moving them. Therefore, with an extremely simple structure, extremely heavy ultra-large ships can be moved to the lifting bottom and dismantled efficiently, and further the equipment costs and dismantling costs required for dismantling can be significantly reduced. The above equipment is characterized by being able to efficiently dismantle ships by shortening the time required for dismantling ships and the time that the ships occupy the second dock. In addition, by making the bottom of the second dock higher than that of the first dock, the costs of excavation and soil disposal at the second dock can be suppressed and reduced, and the construction period can be shortened, resulting in low costs.

[0023] In another embodiment of the ship dismantling device of the present disclosure, the first dock and the second dock can be arranged linearly in the fore-aft direction of the ship. The ship dismantling device described above has a feature that the ship can be moved straight in the direction of travel, smoothly and safely moved from the first dock to the second dock without difficulty, and unloaded, for efficient and safe dismantling. Note that arranging the first dock and the second dock linearly in the fore-aft direction of the ship refers to an arrangement in which the ship can be moved from the first dock to the second dock by moving in the fore-aft direction, and includes a diagonal forward or backward direction within the range in which the ship can travel. It also includes a case in which the width of one of the first dock and the second dock is wider than the width of the other, and a part of one of the docks is arranged linearly with the other in the fore-aft direction of the ship.

[0024] In another embodiment of the ship dismantling device of the present disclosure, the first dock and the second dock can be arranged in a parallel position adjacent to each other. The above dismantling device has a feature that the movement distance of the ship can be shortened by arranging the first dock and the second dock in a parallel position adjacent to each other in the width direction of the ship, and the ship can be moved smoothly and safely without difficulty. The above device also has a feature that the overall length (longitudinal direction) of the dock to be dismantled can be shortened, dismantling according to the topography where dismantling is performed can be performed, and the options for dismantling locations can be expanded. Note that arranging the first dock and the second dock in a parallel position adjacent to each other refers to an arrangement in which the ship can be moved in the width direction from the first dock to the second dock, and includes a case in which the first dock and the second dock are arranged in a substantially parallel position when the ship moves in the front-rear direction together with the width direction of the ship (or in stages). Also includes a case in which the length (long side) of either the first dock or the second dock is wider than the length (long side) of the other, and a part of either one is arranged adjacent to the other in a parallel position.

[0025] In the ship dismantling equipment according to another embodiment of the present disclosure, the total length of the first dock can be 300 m or more. The above-mentioned dismantling equipment has a feature that it can smoothly land ultra-large ships with a total length of 300 m or more on the lifting bottom with a simple structure and dismantle them efficiently and safely.

[0026] In another embodiment of the ship dismantling device of the present disclosure, the inside width of the first dock can be set to 50 m or more and 100 m or less. The above-mentioned dismantling device has a feature that it can smoothly land an ultra-large ship having a width of 50 m or more and 100 m or less on the lifting bottom with a simple structure and dismantle it efficiently and safely.

[0027] In another embodiment of the ship dismantling device of the present invention, the second dock can have a peripheral wall around it. The above-mentioned dismantling device has a feature that by providing a peripheral wall around the area where seawater overflows from the second dock, seawater can be prevented from overflowing from the second dock onto the outer ground line, and dismantling can be performed efficiently and safely. In addition, the peripheral wall around the second dock can expand the setting range of the depth of the lifting bottom of the second dock. By appropriately positioning the lifting bottom according to the ship to be dismantled, the landing height of the ship can be determined, and the efficiency and safety of dismantling from the ground line or working deck can be improved.

[0028] In a ship dismantling device according to another embodiment of the present disclosure, the lifting bottom surface can be inclined downward toward the boundary with the first dock. The above-mentioned dismantling device has the features that it can naturally flow down a downward slope of various waste liquids and liquids discharged from a ship being dismantled, such as water and waste oil remaining in the ship, or can encourage the flow of the liquids, guide them in a predetermined discharge direction and place, and discharge them from a predetermined discharge route, and can perform appropriate wastewater and waste oil treatment, suppress dirt inside the dock and keep it clean, suppress work interference, and perform efficient and safe dismantling.

[0029] In another embodiment of the ship dismantling equipment of the present disclosure, the first dock can be made 10m or more deep, and the second dock can be made 3m or more deep. The above-mentioned dismantling equipment has a simple structure that allows ultra-large ships with a depth of 10m or more to enter the first dock, and has the advantage that the ships can be lifted smoothly onto the bottom surface with little energy and dismantled efficiently and safely.

[0030] The dismantling method and dismantling device of the present disclosure will be described in detail below with reference to the drawings. In the following description, terms indicating specific directions or positions (e.g., "upper", "lower", and other terms including these terms) will be used as necessary, but the use of these terms is for the purpose of facilitating understanding of the invention with reference to the drawings, and the meanings of these terms do not limit the technical scope of the present invention. In addition, parts with the same reference numerals appearing in multiple drawings indicate the same or equivalent parts or members. Furthermore, the embodiments shown below are specific examples of the technical ideas of the present invention, and do not limit the present invention to the following. Furthermore, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the components described below are intended to be illustrative and not to limit the scope of the present disclosure. Furthermore, the contents described in one embodiment and example are applicable to other embodiments and examples. Furthermore, the sizes and positional relationships of the members shown in the drawings may be exaggerated to clarify the explanation. For example, the dismantling devices 100, 200, 300, 400, the first dock 10, the second dock 20, the ship 1, etc. shown in the drawings are exaggerated to clarify the explanation and to grasp the overall picture, and the length and width, scale, etc. are not accurate. (Embodiment 1) (Demolition equipment 100)

[0031] 1 to 9 show a ship dismantling apparatus 100 according to the first embodiment. The ship dismantling apparatus 100 in FIG. 1 includes a first dock 10 having a gate 2 that can be opened and closed at the entrance of the ship 1, a second dock 20 connected to the first dock 10 and having a lifting bottom surface 21, a water supply pump 4 that supplies seawater into the dock, a drainage mechanism 6 that drains seawater from the second dock 20 to put the second dock 20 in a drained state, a dismantling mechanism 30 that cuts the ship 1, and a control mechanism that controls opening and closing of the gate 2 and the operation of the water supply pump 4 and the drainage mechanism 5. The lifting bottom surface 21 is a bottom surface provided in the second dock 20 and is arranged at a higher position than the dock bottom surface 11, which is the bottom surface of the first dock 10. The ship dismantling apparatus 100 places the ship 1 on the lifting bottom surface 21 of the second dock 20 in a drained state, and cuts and dismantles the ship 1 by the dismantling mechanism 30 in a landed state.

[0032] The ship dismantling equipment 100 first opens the gate 2, sets the inland water level (WLin) of the first dock 10 to the same seawater level as the ocean water level (WLout) outside the gate 2, and floats the ship 1 on the seawater to dock in the first dock 10 (ship docking process). For example, a ship 1 that can navigate under its own power can dock by sailing. Also, the ship 1 can be towed from the sea or land by a towing ship, wire, rope, etc., and docked in the first dock 10. The ship is docked at an appropriate speed to ensure safety depending on the width, overall length, size, shape, draft, ship bottom, condition, waves, wind, etc. of the ship. When the ship 1 is docked in the first dock 10, the gate 2 is closed and the water supply pump 4 supplies seawater to the first dock 10 and the second dock 20 to raise the inland water level (WLin) of the first dock 10 and the second dock 20. As the inland water level (WLin) in the dock rises, the ship 1 is lifted up by the buoyancy of the seawater and rises (seawater rising process). Generally, a ship, particularly an ultra-large ship having an extremely heavy weight, requires an extremely large lifting mechanism and machinery equipment to be lifted mechanically, but the ship dismantling equipment 100 of the present disclosure can lift the ship 1 to a predetermined height while it is floating in the seawater by buoyancy by closing the gate 2 and supplying seawater to the first dock 10 and the second dock 20 to raise the inland water level (WLin), so that the lifting of the ship 1 can be realized with an extremely simple structure consisting of the gate 2, the water supply pump 4, the first dock 10, and the second dock 20 without requiring a large lifting mechanism or equipment. The inland water level (WLin) is raised to a height that allows the ship 1 to move from the first dock 10 to the second dock 20.

[0033] The inland water level (WLin) of the first dock 10 and the second dock 20 is raised, and the ship 1 is moved from the first dock 10 to a predetermined position in the second dock 20 while floating on seawater (ship moving process). The ship 1 floating on seawater can be moved from the first dock 10 to the second dock 20 with a weak force. As in the case of docking in the first dock 10, for example, the ship 1 that can navigate under its own power can navigate, and the ship 1 can be moved from the first dock 10 to the second dock 20 by towing it with a towing ship and towing it with a wire or rope from both sides of the first dock 10 or the second dock 20. Therefore, the movement from the first dock 10 to the second dock 20 can be realized extremely easily while floating on seawater, as in the case of docking in the first dock 10, and does not require a complex or large moving mechanism or machinery for the movement, and the energy for the movement can be extremely small. The ship 1 can be lifted in the first dock 10 and moved to the second dock 20 with low resistance, economically and efficiently, without the bottom of the ship coming into contact with the ground (the bottoms of the first dock 10 and the second dock 20), and safety can be ensured. The ship 1 in the first dock 10 with the gate 2 closed is less affected by external conditions such as wind and waves than in the open sea, and can be moved to the second dock 20 at an appropriate speed to ensure safety. In particular, the movement of the ship 1 is carried out with sufficient consideration given to safety, with attention paid to contact or collision of the ship 1 with the side walls of the first dock 10 or the second dock 20.

[0034] With the ship 1 moved above the lifting bottom surface 21 of the second dock 20, the drainage mechanism 5 discharges seawater from the second dock 20 to lower the inland water level (WLin) of the second dock 20. As the inland water level (WLin) of the second dock 20 drops, the ship 1 floating on the seawater is lowered, the bottom of the ship 1 comes into contact with the lifting bottom surface 21, and the ship 1 is landed on the lifting bottom surface 21 (seawater discharge process). Since the ship 1 floating by buoyancy is lowered and landed on the lifting bottom surface 21, a large landing mechanism for landing an extra-large ship is not required, and the ship 1 can be landed with a very simple structure and small energy. The ship 1 landed and left stationary on the lifting bottom surface 21 is dismantled and cut by the dismantling mechanism 30 arranged around and in the vicinity of the ship 1 (ship cutting process). The ship dismantling equipment 100 uses the gate 2, the water supply pump 4 and the drainage pump 5A to raise and lower the inland water level (WLin) of the first dock 10 and the second dock 20, thereby enabling the ship 1 to be docked in the first dock 10, moved to the second dock 20, and then loaded onto the lifting bottom 21, landed, cut up and dismantled. (Dock 10)

[0035] The first dock 10 is an area where the ship 1 to be dismantled is docked, and is arranged on the sea frontage side of the dismantling device 100 and the entrance side of the ship 1. The first dock 10 has a gate 2 that can be opened and closed at the entrance of the ship 1. The first dock 10 in FIG. 1 has a frontage on the side facing the sea side, and has a gate 2 that can be opened and closed at the frontage. The first dock 10 in FIG. 1 has a frontage in the short direction and a depth in the long direction. The first dock 10 in FIG. 1 has a small gate 2 at a narrow frontage facing the sea frontage, and the ship 1 can be docked by moving forward, and the gate 2 can be opened and closed quickly. The narrow frontage and small gate 2 can reduce construction and equipment costs, and contribute to efficient movement, lifting, and dismantling of the ship 1. In the first dock 10 of FIG. 1, the ship 1 can be docked at the first dock 10, and then moved to the second dock 20 by raising the inland water level (WLin) and floating the ship 1 by the buoyancy of seawater.

[0036] The first dock 10 has an appropriate size, shape, length, depth, etc., to accommodate the ship 1 to be dismantled. The first dock 10 in Fig. 1 is rectangular in shape according to the size, shape, etc., of the ship 1 to be dismantled, but is not limited to this. The first dock 10 can accommodate ultra-large ships with a total length of, for example, 330 m or more and a loading capacity of 300,000 tons or more that sail around the world. The ship 1 that is docked in the first dock 10 can be moved to the second dock 20 and unloaded onto the lifting bottom 21 for dismantling.

[0037] The dismantling device 100 of the present disclosure does not specify the ship 1 to be dismantled, and can be used for dismantling ships such as crude oil tankers, container ships, cargo ships, and passenger ships. The ship 1 to be dismantled has a different overall length and width depending on the type of ship. For example, the overall length and width of an oil tanker, container ship, and cargo ship are as follows, so that the first dock 10 and the second dock 20 can be dismantled by placing a super-large ship sailing around the world on the lifting bottom 21 of the second dock 20, with an overall length of 450 m and an inner width of 70 m, for example. For example, an oil tanker with a loading capacity of 300,000 tons, of which there are about 800 ships sailing around the world, has an overall length of 330 m and a width of 60 m, and the world's largest container ship has an overall length of 400 m and a width of 61 m.

[0038] The dock bottom 11 of the first dock 10 is disposed below the seawater level (WLout) of the ocean. The gate 2 of the first dock 10 can be opened to allow seawater to flow naturally into the first dock 10 from the outside. A very large ship has a draft of 3 to 7 m or less when loaded with oil or containers, but the draft is 3 to 7 m or less when empty without any cargo. Therefore, the first dock 10 has a depth of 7 m, and can float very large ships that sail around the world almost without exception on seawater, dock and dismantle them. Furthermore, the first dock 10 can have a depth of 10 m or more and 20 m or less, for example, to expand the range of applications of the dismantling device 100. For example, in addition to dismantling the ship 1, it can be used for other purposes such as maintenance and repair of the ship 1. (Gate 2)

[0039] The first dock 10 has a gate 2 at its entrance that can be closed to have a watertight structure. The gate 2 can be closed to supply seawater into the first dock 10 or to discharge seawater from the first dock 10, thereby raising or lowering the inland water level (WLin) in the first dock 10. When the gate 2 is open, seawater can flow into the first dock 10 from outside the gate 2, making the inland water level (WLin) of the first dock 10 the same as the seawater level (WLout) outside the gate 2. When the gate 2 is open, the inland water level (WLin) can be made the same as the seawater level (WLout), and the ship 1 waiting outside the gate 2 can enter the first dock 10 while floating on seawater. Since the ship 1 enters the first dock 10 from the open sea by passing through the open gate 2, the gate 2 has a width, structure, etc. that allows seawater to flow in when open, and allows the ship 1 to pass through. Furthermore, with the gate 2 closed, the water supply pump 4 and the drainage mechanism 5 raise and lower the inner water level (WLin) of the first dock 10 and the second dock 20, so the gate has a structure that can close the entrance of the first dock 10 watertightly. This disclosure does not specify the structure or opening / closing method of the gate 2, and for example, a structure that opens and closes by moving vertically or horizontally, or a double- or single-leaf door structure can be used. The first dock 10 can use any gate currently in use that can be used with the dismantling equipment 100, or any gate that will be developed in the future. (2nd Dock 20)

[0040] The second dock 20 is connected to the first dock 10 and is an area where the ship 1 is dismantled. The second dock 20 has a lifting bottom surface 21 at its bottom, and is an area where the ship 1 is landed on the lifting bottom surface 21 and dismantled. The second dock 20 can be turned into a dry dock on land by draining the seawater inside, and the ship 1 that is stably placed and fixed can be cut and dismantled efficiently, in a short time, and with high safety on stable ground. Compared to cutting and dismantling work performed on the sea (floating dock), the ground on land is stable and many types of heavy machinery can be used. Within the partitioned area of ​​the second dock, sufficient measures can be taken to prevent environmental pollution due to emissions and waste such as asbestos and heavy oil. In addition, the manufacturing costs and running costs of the dock can be reduced.

[0041] The second dock 20 is disposed adjacent to the first dock 10. The layout relationship between the second dock 20 and the first dock 10 is appropriately determined in accordance with topographical conditions such as the area and shape of the entire site, the length of the frontage to the sea side, the efficiency of dismantling and transportation work, the layout of equipment and machinery, and also taking into consideration equipment costs and construction costs. For example, in the dismantling device 100 of FIG. 1, the second dock 20 adjacent to the first dock 10 is disposed in a straight line extending in the fore-aft direction of the ship 1. In the dismantling device 100 of FIG. 1, the second dock 20 is disposed adjacent to the first dock 10 at the end opposite to the entrance side (gate 2 side) of the first dock 10. In FIG. 1, the second dock 20, which is also elongated and rectangular, is arranged in a straight line at the end of the first dock 10, which is also elongated and rectangular, to form the dismantling device 100 into a single elongated rectangle. The dismantling device 100 in FIG. 1 is arranged such that the long sides of the first dock 10 and the second dock 20 are linear.

[0042] The second dock 20 has an appropriate size, shape, and length so that the ship 1 to be dismantled can be landed on the lifting bottom 21 and dismantled. The second dock 20 has a lifting bottom 21 at its bottom. The ship 1 is landed on the lifting bottom 2 and dismantled. The ship 1 that has surfaced in seawater is moved from the first dock 10 to the second dock 20, and the ship 1 is landed on the lifting bottom 2. The lifting bottom 21 has a shape that allows the ship 1 to be safely landed. The lifting bottom 21 has a shape that corresponds to the bottom of the ship 1, for example, and the ship 1 can be stably landed by laying and interposing a flooring material such as a block, an elastic member, a cushioning member, etc. between the lifting bottom 21 and the seawater in the second dock 20 is drained and the bottom of the ship 1 comes into direct or indirect contact with the lifting bottom 21, so that the ship 1, such as an ultra-large ship, can be held in a stable position by its own weight. Furthermore, by providing a mechanism for holding or fixing the ship 1, such as a block, ship stopper, wire, guide, etc., the ship 1 can be held or fixed more stably. For example, the block is set on the lifting bottom surface 21 at a certain distance in a position extending in the width direction of the ship 1. This block has an upper surface shaped to fit along the bottom surface of the ship 1, and stably land the ship 1 on the lifting bottom surface 21. Furthermore, by providing a mechanism for holding and fixing the ship 1 according to the hull cutting and dismantling process, the remaining hull remaining in the second dock 20 can be stably held or fixed. By stably holding or fixing the ship 1 according to the size, shape, condition, etc. of the remaining ship, the cutting and dismantling work can be performed safely and efficiently.

[0043] The lifting bottom surface 21 is disposed at a position higher than the dock bottom surface 11 of the bottom surface of the first dock 10. The lowest position of the lifting bottom surface 21 is disposed at a position higher than the highest position and / or lowest position of the dock bottom surface 11. By disposing the lifting bottom surface 21 at a position higher than the bottom surface of the first dock 10, the dismantling device 100 can lift and land the ship 1 at a position higher than the dock bottom surface 11 of the first dock 10. If the lifting bottom surface of the second dock is at the same height as the bottom surface (dock bottom surface) of the first dock, the landing position where the ship is lifted by the lifting bottom surface will be at the same height as the bottom surface of the first dock, which is lower than the ground line GL, and the height difference between the ground line GL and the lifting bottom surface will be large, which may reduce the efficiency and / or safety of the dismantling work, and may cause problems such as an increase in equipment costs, such as a need for a dismantling mechanism with a long arm. In addition, problems may occur such as a large volume in the second dock, which increases the time required for supplying and discharging seawater, which reduces the efficiency of landing, and an increase in construction costs due to the need to excavate the lifting bottom of the second dock to the same depth as the dock bottom or to provide a high wall. In contrast, the dismantling device 100 of the present disclosure can avoid these problems by arranging the lifting bottom 21 at a position higher than the dock bottom 11 of the bottom of the first dock 10. By arranging the lifting bottom 21 of the dismantling device 100 at a position higher than the dock bottom 11, the height difference between the ground line GL and the lifting bottom 21 can be reduced, allowing work and visual inspection from a close distance, expanding the working range of the dismantling mechanism 30, improving the efficiency of dismantling work from the ground line GL, and improving safety. This lifting bottom 21 can land the ship 1 at a position higher than the dock bottom 11. In particular, by landing the large ship so that the Grand Line GL around the second dock 20 is located in the middle of the large ship, and the upper part of the large ship is higher than the Grand Line GL, the efficiency and safety of the dismantling work can be improved. In addition, the capacity of the second dock 20 can be reduced, shortening the time required for supplying and discharging seawater to and from the second dock 20, thereby shortening the time required for landing and improving efficiency. In addition, the excavation depth of the second dock 20 can be made shallow, reducing equipment costs and shortening the construction period. The lifting bottom surface 21 can also be located at a position with almost no difference in height from the Grand Line GL.The dismantling device 100 can adjust the lifting bottom surface 21 to an appropriate height according to the ship 1 being dismantled, thereby improving the efficiency and safety of the dismantling work, and also reducing the equipment costs of the dismantling mechanism 30, the overall construction costs, and the dismantling costs.

[0044] The vertical position of the lifting bottom surface 21 specifies the vertical position of the ship 1 to be landed. The lifting bottom surface 21 can be placed on approximately the same plane as the Grand Line GL, and can be placed at a height of 2.5 m or less above the Grand Line GL, or at a position lower than the Grand Line GL. For example, the lifting bottom surface 21 in FIG. 8 is placed on approximately the same plane as the Grand Line GL. In this disclosure, the term "approximately the same plane as the Grand Line GL" refers to a range in which the lifting bottom surface 21 can be said to be substantially on the same plane as the Grand Line GL, taking into account the difference in height between the Grand Line GL and the dock bottom surface 11, and is used to mean a range of 2.5 m above and below the Grand Line GL. The lifting bottom surface 21 of the dismantling device 100 in FIG. 8 has the characteristic that the ship 1 can be lifted to a position near the Grand Line GL and dismantled, and can be efficiently dismantled by the dismantling mechanism 30. This is because the operator operating the dismantling mechanism 30 can cut and dismantle the ship 1 while visually checking the ship 1 lifted to the vicinity of the Grand Line GL. Furthermore, by providing the lifting bottom surface 21 on approximately the same plane as the ground line GL, the difference in height with the ground line GL can be reduced, and the equipment costs and construction costs of the dismantling mechanism 30 can be suppressed and reduced.

[0045] As shown in FIG. 9, the lifting bottom surface 21 can be disposed at a height equal to or lower than the ground line GL. In FIG. 9, the lifting bottom surface 21 is disposed between the dock bottom surface 11 of the first dock 10 and the ground line GL. This lifting bottom surface 21 can be cut and dismantled by the dismantling mechanism 30 from a position higher than the bottom of the ship 1. One or more dismantling mechanisms 30 can be disposed, and cutting and dismantling can be efficiently performed from different heights and positions. For example, the dismantling mechanism 30 can be disposed on the ground line GL outside the second dock 20, on the work deck 25, and on the lifting bottom surface 21. The operator of the dismantling mechanism 30 can visually check the ship 1 from a position close to the ship 1, and the equipment cost of the dismantling mechanism 30 can be suppressed and reduced. The arrangement of the lifting bottom surface 21 in Figure 9 allows the ground line GL to be used as the work deck 25, eliminating the need to install a peripheral wall 23, or allowing the peripheral wall 23 to be low, or allowing for the installation of a safety fence, etc., thereby suppressing and reducing construction costs.

[0046] The dismantling device 100 in FIG. 1 is provided with a step portion 22 at the boundary between the first dock 10 and the second dock 20, and the lifting bottom surface 21 is positioned higher than the dock bottom surface 11, which is the bottom surface of the first dock 10. The step portion 22 forms a step with a height difference between the dock bottom surface 11 of the first dock 10 and the lifting bottom surface 21 of the second dock 20 (for example, FIG. 4, etc.). The step portion 22 can be configured to include a substantially horizontal surface, a substantially vertical surface, a flat surface, a curved surface, a gradient, and an inclined surface. The height difference between the lifting bottom surface 21 and the dock bottom surface 11 is, for example, 2 m or more, preferably 3 m or more, and more preferably 5 m or more.

[0047] The second dock 20 has the same inland water level (WLin) as the first dock 10, and the ship 1 can be moved from the first dock 10 floating on seawater. The depth of the second dock 20 is set to a depth that allows the empty ship 1 to be moved from the first dock 10 to above the lifting bottom 21 floating on seawater. For example, ultra-large tankers, container ships, cargo ships, etc. have an empty draft of shallow 3m or less. Therefore, the second dock 20, where these ships 1 are dismantled, has a depth of 3m or more, and most tankers, container ships, cargo ships, etc. can be moved and dismantled. The second dock 20 can have a portion lower than the lifting bottom surface 21 or a buffer material on the boundary side with the first dock 10 (the step portion 22 side), and can be shaped to match the bottom of the ship, so that the second dock 20 can avoid contact of the bottom of the ship with the lifting bottom surface 21 or can have a shape and structure that can reduce contact resistance when moving the ship 1 from the first dock 10 to the second dock 20. The second dock 20 has a lifting bottom surface 21 that slopes downward toward the boundary with the first dock 10, so that the downward slope can reduce contact, sliding resistance, and collision impact. The step portion 22 can also be made into a gently curved surface, and the angle of the downward slope can be increased as it approaches the step portion 22 side.

[0048] The second dock 20 may be provided with a peripheral wall 23 that covers the periphery along the outer periphery. Since the second dock 20 moves the ship 1 from the first dock 10 by floating it on seawater, the peripheral wall 23 is set to an appropriate height so that the seawater does not overflow the peripheral wall 23 due to waves generated when the ship 1 is moved. The peripheral wall 23 may be provided with a shape and structure such as unevenness, a turn, an inner inclined surface, an inner protrusion, etc. so that the seawater does not overflow the peripheral wall 23. By providing the peripheral wall 23 that prevents and suppresses the overflow of seawater, the lifting bottom surface 21 can be disposed at a high position near the ground line GL. The peripheral wall 23 may be provided not only around the second dock 20 but also around the first dock 10, and the influence of external conditions such as waves and wind on the ship 1 can be reduced compared to the open sea, which contributes to the efficiency and safety of moving and dismantling the ship 1. The second dock 20 moves the ship 1 from the first dock 10 by setting the inland water level (WLin) lower than the upper surface of the peripheral wall 23. The depth of the second dock 20 (the water depth at which the ship 1 can move) is appropriately set in consideration of the draft of the ship 1 when moving the ship 1 from the first dock 10 to the second dock 20. For example, even in the case of a super-large ship, the draft in an empty state is smaller than 3 m, so that the moving water depth of the second dock 20 can be set to 3 m or more to move a large ship 1 to the second dock 20, but preferably, the maximum water depth of the second dock 20 including the height of the peripheral wall 23 (the depth from the upper part of the peripheral wall 23 to the bottom surface of the second dock 20) ​​is set to, for example, 3 m to 10 m, preferably 4 m to 9 m, so that the ship 1 that sways, floats, sinks, and moves up and down and left and right can be moved smoothly away from the lifting bottom surface 21.

[0049] 1 has a peripheral wall 23 along the outer periphery of both the first dock 10 and the second dock 20. In the process of moving the ship 1 from the first dock 10 to the second dock 20, the gate 2 of the first dock 10 can be closed in a watertight structure and seawater can be supplied inside the peripheral wall 23 to raise the inland water level (WLin) higher than the ground line GL. In this state, the ship 1 floats and the ship bottom is raised to a position higher than the lifting bottom surface 21, and the ship can be moved from the first dock 10 to the second dock 20 while floating on the seawater.

[0050] The lifting bottom surface 21 of the second dock 20 may have an incline or gradient. For example, in the arrangement of the first dock 10 and the second dock 20 in FIG. 1, the lifting bottom surface 21 of the second dock 20 may be inclined downward toward the boundary with the first dock 10, so that the lifting bottom surface 21 may be inclined downward toward the front-rear direction of the ship 1. The inclination gradient of the lifting bottom surface 21 is set to a gradient that allows various waste liquids discharged from the ship 1 to be dismantled, such as water and waste oil remaining in the ship 1, to flow naturally. Water naturally flows downward at a gradient of 0.5% or more, so the inclination gradient of the lifting bottom surface 21 is set to at least 0.5%. The inclination gradient of the lifting bottom surface 21 is preferably 1% or more so that waste liquids such as waste oil can smoothly flow downward in addition to water. The lifting bottom 21, which slopes downward toward the first dock 10, slopes upward as it moves away from the boundary of the first dock 10, making the depth of the second dock 20 shallower. For example, the second dock 20 has a total length of 300 m and a slope gradient of the lifting bottom 21 of 1%, which creates a height difference of 3 m at both ends of the lifting bottom 21. The vertical difference of the lifting bottom 21 is a factor that changes the maximum depth of the second dock 20, making the maximum depth on the opposite side to the boundary with the first dock 10 shallower. The height of the peripheral wall 23 is set to a height that allows the ship 1 to move floating on seawater, taking into account the slope of the lifting bottom 21.

[0051] The lifting bottom surface 21 may be provided with one or more discharge gutters 6. The discharge gutters 6 discharge various waste liquids discharged from the ship 1 to be dismantled, such as water and waste oil remaining in the ship 1. The lifting bottom surface 21 has a downward slope toward the boundary with the first dock 10, so that the waste liquids of the ship 1 can be discharged from the discharge gutters 6 by gravity flowing down. The discharge gutters 6 are provided at appropriate positions for discharging the waste liquids and seawater of the ship 1. For example, the discharge gutters 6 in FIG. 2 are provided at the boundary between the second dock 20 and the first dock 10. The discharge gutters 6 provided on the lifting bottom surface 21 on the second dock 20 side can accumulate waste liquids such as waste oil and seawater mixed with waste oil discharged from the ship 1 to be dismantled without mixing with the seawater in the first dock 10 or after mixing with it, and discharge them to the outside.

[0052] The lifting bottom surface 21 of the second dock 20 can be inclined downward in the width direction of the ship 1. As with the downward gradient in the longitudinal direction of the ship 1, the gradient is set to be 1% or more so that the waste liquid from the ship 1 can flow naturally. By using this downward gradient, the waste liquid can be made to flow into the discharge groove 6 provided on both sides or one side of the lifting bottom surface 21 and discharged to the outside. The discharge groove 6 provided on the side of the lifting bottom surface 21 can collect the waste liquid from the ship 1 in the groove with a short moving distance on the lifting bottom surface 21. In addition, for example, the second dock 20 with an inner width of 50 m and a gradient of the lifting bottom surface 21 of 1% has a height difference of 50 cm between the center of the uppermost lifting bottom surface 21 and both ends of the lowermost lifting bottom surface 21, but compared to the gradient of the lifting bottom surface 21 in the longitudinal direction, the height difference and the maximum depth are less likely to be a problem, and there is an advantage in that the gradient of the gradient is increased to easily guide the waste liquid to the discharge groove 6 smoothly. The raised bottom surface 21 of the second dock 20 may be inclined downwardly in the width direction of the ship 1 toward the boundary with the first dock 10 .

[0053] The lifting bottom 21 can be provided with a buffer material such as a block that can reduce impact and resistance when the bottom of the ship 1 contacts the lifting bottom 21 and can hold the ship 1 in a stable position. The water supply pump 4 supplies seawater to the first dock 10 and the second dock 20 to raise the inland water level (WLin), and raises the ship 1 while floating from the bottom of the first dock 10 by buoyancy. The surfaced ship 1 can move from the first dock 10 to the second dock 20 without the bottom of the ship contacting the lifting bottom 21 of the second dock 20 (FIG. 6). In addition, the surfaced ship 1 can move from the first dock 10 to the second dock 20 by contacting or temporarily contacting the bottom of the ship 1 with the lifting bottom 21 or the block. The buoyancy of the seawater reduces the effective weight of the ship 1, allowing it to move safely with little energy. The lifting bottom 21, particularly the blocks with a cushioning effect provided near the boundary with the first dock 10, protects the ship's bottom and the lifting bottom 21 and reduces frictional resistance between the ship's bottom and the lifting bottom 21, allowing the ship 1 to be moved smoothly and safely to the second dock 20.

[0054] The ship dismantling device 100 can be provided with a work deck 25 on one or both sides of the second dock 20, the work deck 25 having a running surface on the upper surface on which the dismantling mechanism 30 can move. The above-mentioned dismantling device 100 has a feature that the dismantling mechanism 30 on the work deck 25 provided on one or both sides of the second dock 20 can dismantle the ship 1 efficiently and safely. The dismantling mechanism 30 can move freely on the work deck 25 and can be easily adjusted to an appropriate posture and position. One or more work decks 25 can be provided at required positions, and the dismantling mechanism 30 can work and move at a predetermined position as a work base, a stable base, and a traveling passage. The multiple work decks 25 can be dismantled from different positions and directions to improve the efficiency and safety of dismantling. The work deck 25 can be arranged substantially on the same plane as the ground line GL. The work deck 25 can be located close to the ship 1, and can be located in the middle of the side of the ship 1, so that the working range of the dismantling mechanism 30 on the work deck 25 can be expanded and the dismantling mechanism 30 can be located close to the ship 1. Workers can efficiently and safely dismantle the ship 1 according to the object to be dismantled and the situation while visually checking the ship 1, the parts to be worked on, etc.

[0055] The peripheral wall 23 may be provided with a work deck 25 along the outer side of the second dock 20, the work deck 25 having a running surface on the upper surface thereof on which the dismantling mechanism 30 can move to dismantle the entire ship 1. As shown in FIG. 1, the peripheral wall 23 may be provided along the first dock 10 and the second dock 20, and the work deck 25 may be provided along the first dock 10 and the second dock 20. The work deck 25 in the figure is provided along the outer side of the peripheral wall 23. When the first dock 10 and the second dock 20 are arranged linearly in the fore-aft direction of the ship 1, the work deck 25 may be provided on both long sides and the short side at the rear of the second dock 20, so that the ship 1 can be approached from a plurality of directions and dismantled efficiently and safely. The work deck 25 may be provided on one side of the long side of the second dock 20 (FIG. 1), or on both long sides, or on the long side and the short side.

[0056] The running surface of the working deck 25 can be arranged substantially in the same plane as the upper surface of the peripheral wall 23. "Substantially in the same plane" means not only the same plane, but also when there is a height difference that can be evaluated as substantially the same plane considering the height difference between the lifting bottom surface 21 and the ground line GL. For example, it is used in the sense that the running surface of the working deck 25 includes a range of 1 m above and below the upper surface of the peripheral wall 23. Note that fences, walls, guardrails, etc. for the safety of workers and the dismantling mechanism can be provided on the running surface of the working deck 25 or the upper surface of the peripheral wall 23. The running surface of the working deck 25 is horizontal and is set to a width that allows the dismantling mechanism 30 to be placed on it for work, for example, a width of 10 m or more so that the self-propelled dismantling mechanism 30 can run. Also, by setting the width wider, for example, 20 m, a large dismantling mechanism 30 can be moved safely. The working deck 25 can be provided with an inclined surface with a downward slope on which the self-propelled dismantling mechanism 30 can enter and exit from the ground line GL. The working deck 25 is designed to have a strength that can support the dismantling mechanism 30 for work.

[0057] The side surface of the second dock 20 can be made into a vertical surface on one or both sides, and can also be provided with inclined surfaces, stepped surfaces, unevenness, etc., and can be made into a flat surface, a curved surface, or a non-planar surface. For example, guides for guiding the ship 1 can be provided on both sides or one side surface of the second dock 20. Also, by making the interval between the two side surfaces of the second dock 20 narrower at the bottom than at the top, in a tapered shape with a narrowing bottom, the ship 1 floating in the sea water can be guided to a stable position and posture on the lifting bottom surface 21.

[0058] The second dock 20 in Fig. 8 is provided with a peripheral wall 23 around it, and the inner area covered by the peripheral wall 23 is defined as the second dock 20. For the second dock 20 with the lifting bottom surface 21 in the same plane as the ground line GL, the maximum height at which seawater can be supplied (the dimension from the lifting bottom surface 21 to the upper surface of the peripheral wall 23) is the height of the peripheral wall 23. The lifting bottom surface 21 can be arranged at a position lower than the ground line GL. The second dock 20 with the lifting bottom surface 21 arranged at a position lower than the ground line GL can deepen the maximum depth of the second dock 20 by lowering the peripheral wall 23 or without providing the peripheral wall 23.

[0059] The dismantling device 100 can provide an intermediate gate 3 in the first dock 10 or the second dock 20 or in the boundary between them. For example, as shown by a chain line in FIG. 5, the dismantling device 100 can provide an intermediate gate 3 between the first dock 10 and the second dock 20. The ship 1 can be dismantled in the second dock 20 without providing the intermediate gate 3. The intermediate gate 3 can close the first dock 10 or the second dock 20 watertightly, and can also close a certain area of ​​the first dock 10 or the second dock 20 watertightly. When the inner water level (WLin) of the first dock 10 is higher than the lifting bottom surface 21 of the second dock 20, the intermediate gate 3 can naturally flow the seawater of the first dock 10 into the second dock 20 in an open state, so that the inner water levels (WLin) of the first dock 10 and the second dock 20 can be made the same level. Seawater is supplied by the feedwater pump 4, and the ship 1 moves from the first dock 10 into the second dock 20 through the open intermediate gate 3, so the intermediate gate 3 is structured to allow the ship 1 to pass through in an open state. The intermediate gate 3 can be closed watertightly to supply seawater into the first dock 10 or the second dock 20, or to discharge seawater from the first dock 10 or the second dock 20, thereby changing and adjusting the inland water level (WLin) in a watertightly closed area, for example, the second dock 20.

[0060] The intermediate gate 3 closes the first dock 10 or the second dock 20, or a certain area of ​​each dock, watertightly, so that each process or work can be carried out in each closed area, and the efficiency and efficiency of dismantling and unloading work can be improved. For example, by closing the intermediate gate 3, the inland water level (WLin) in each dock 10 and the second dock 20 can be set to different heights, and different work can be carried out simultaneously in the first dock 10 and the second dock 20. For example, the second dock 20 can discharge water and unload the ship 1 onto the lifting bottom 21, or the second dock 20 can perform dismantling work on the ship 1, and the first dock 10 can perform work for docking the next ship 1. Also, the first dock 10 can dock the ship 1, and prepare it for moving to the second dock 20, so that it can be moved to the second dock 20 quickly. Furthermore, the intermediate gate 3 can move seawater between the first dock 10 and the second dock 20. The intermediate gate 3 can be provided with a mechanism that can adjust the amount of seawater movement as well as open and close. The intermediate gate 3 can adjust the height of a predetermined area, for example, the inland water level (WLin) of the first dock 10 or the second dock 20, or a certain area within the first dock 10 or the second dock 20, by opening and closing or by the seawater movement mechanism. The opening and closing of the intermediate gate 3 or the seawater movement mechanism can assist and improve the efficiency of the water supply and discharge of the water supply pump 4 or the discharge mechanism 5 (discharge pump 5A). For example, seawater discharged in the discharge process of the second dock 20 can be made to flow into the first dock 10 and used for the docking process of the next ship 1. For example, with the intermediate gate 3 closed and seawater stored in the second dock 20, gate 2 is opened to allow the next ship 1 to dock in the first dock 10, and at the stage of closing gate 2 and supplying seawater to the first dock 10 with the feed water pump 4, the intermediate gate 3 is opened or a seawater moving mechanism is used to allow seawater from the second dock 20 to flow into the first dock 10 to raise the inland water level (WLin) of the first dock 10, and at the same time, the inland water level (WLin) in the second dock 20 is lowered, and work and processes can proceed to land the ship 1. Note that, like the gate 2, the intermediate gate 3 does not have a specified door structure, opening and closing mechanism, etc.

[0061] The first dock 10 and the second dock 20 can each be of an appropriate size and shape to accommodate one ship 1. The second dock 20 and the first dock 10 can be of the same or different size, shape, and length. The first dock 10 or the second dock 20 can also be of an appropriate size and shape to accommodate multiple ships 1. In this case, the length, width, size, shape, etc. of the first dock 10 or the second dock 20 are within an appropriate range that allows multiple ships 1 to be accommodated side by side in the fore-aft direction, width direction, etc. of the ships 1. The second dock 20 can accommodate and land multiple ships 1 in one second dock 20 by having a slope, a step, or an unevenness. For example, the second dock 20 can have a downward slope toward the boundary with the first dock 10. The ships 1 can be moved from the first dock 10 to the back of the second dock 20 in sequence. For example, the ship 1 that is moved first from the first dock 10 can be moved to a higher position (rear) above the lifting bottom 21 away from the first dock 10 by raising the inland water level (WLin) in the second dock 20, and then the water can be discharged and landed. The ship 1 that is moved later can be moved to a lower position (forward) above the lifting bottom 21 near the boundary of the first dock 10 while keeping the rise of the inland water level (WLin) lower than before, and then the water can be discharged and landed. The same applies when the second dock 20 has steps or irregularities. For example, the ship 1 to be moved first can be landed on the upper lifting bottom 21 at a higher position away from the first dock 10 by raising the inland water level (WLin) in the second dock 20, and the ship 1 to be moved later can be landed on the lower lifting bottom 21 at a lower position near the boundary of the first dock 10 while suppressing the rise of the inland water level (WLin) lower than the first one. In addition, by providing an intermediate gate 3 in the second dock 20, the second dock 20 can be divided and the inflow of seawater and the inland water level (WLin) can be adjusted, and multiple ships 1 can be moved, stored, and landed in one second dock 20. The second dock 20 can be called a third dock by taking into account the steps, unevenness, inclination, etc. of the second dock 20 and the divided range of the intermediate gate as another dock. In either case, the lifting bottom 21 is shaped to match the ship bottom so that the ship 1 can be landed in a stable position. (Demolition mechanism 30)

[0062] The dismantling mechanism 30 dismantles the ship 1 placed on the lifting bottom 21 of the second dock 20 in a drained state. The present disclosure does not specify the type, structure, function, etc. of the dismantling mechanism 30 for dismantling the ship 1, and any mechanism capable of cutting, dismantling, and discharging the ship 1 landed on the lifting bottom 21 of the second dock 20 can be used. FIG. 3 is a perspective view showing an example of the dismantling mechanism 30. The dismantling mechanism 30 shown in the figure has a cutting heavy machine 31 that cuts the steel plate or iron plate of the ship 1 and cuts it into pieces of a size that can be transported, and a discharging heavy machine 32 such as a crane that lifts the cut pieces and carries them out of the second dock 20. The cutting heavy machine 31 and the discharging heavy machine 32 can be self-propelled heavy machines such as Caterpillar (registered trademark) as well as non-self-propelled or fixed heavy machines. The self-propelled heavy machine can move on the running surface of the work deck 25 to cut the ship 1 at the optimal position, and can also lift and carry the cut pieces to the outside. The cutting heavy equipment 31 has a cutting machine connected to the tip side of the arm. The cutting heavy equipment 31 cuts the ship 1 into a cut object by an operator controlling the position and posture of the arm and the cutting machine. The cutting machine can have any structure capable of cutting the steel plates of the hull of the ship 1, for example, a structure that clamps the steel plates of the hull with a blade to cut them, a structure that cuts the steel plates by irradiating them with a laser beam, or a structure that cuts the steel plates with both a blade and a laser beam. The discharge heavy equipment 32 can lift the cut object and carry it out of the second dock 20 for dismantling.

[0063] The cutting heavy machine 31 and the discharge heavy machine 32 can cut up almost all super-large ships with a loading capacity of 300,000 tons or more, for example, with a maximum workable radius of about 30 m, and discharge the cut pieces from the second dock 20 for dismantling. By arranging the work deck 25 in a position close to the ship 1, or arranging the work deck 25 in a middle position of the landed ship 1, a large hull can be efficiently cut using a cutting heavy machine 31 with a small maximum workable radius, in other words, a short arm. The cutting heavy machine 31 with a small maximum workable radius can reduce the total length of the arm that moves the heavy cutting machine up and down, thereby reducing the cost of the cutting heavy machine 31. In addition, the cutting heavy machine 31 with a short arm can cut the hull more safely and efficiently than a large cutting heavy machine that tilts a long arm, for example, because the operator can easily control the cutting machine at the end of the arm by visually checking the cutting machine at the end of the arm to an accurate position and attitude. By setting the height of the ground line GL near the middle of the ship 1 landed on the lifting bottom surface 21, the work deck 25 can be arranged near the middle of the ship 1. The cutting machine 31 on the work deck 25 can work on the upper part of the hull with its arm angled upward, and on the lower part of the hull with its arm angled downward. Therefore, for example, an ultra-large ship with a height of 30 m can be cut by the cutting machine 31, which has a maximum workable radius of about 15 m, which is about half the height. The dismantling mechanism 30 has the cutting machine 31 and the discharge machine 32, and can efficiently dismantle the ship 1 by cutting with the cutting machine 31 and discharging the cut pieces with the discharge machine 32, but the dismantling mechanism 30 can also be composed of only the cutting machine 31. For example, the cutting machine 31, which clamps the hull and cuts it, can also grab the cut pieces and discharge them from the second dock 20. (Water supply pump 4)

[0064] The supply water pump 4 can supply seawater to both the first dock 10 and the second dock 20 at the same time or at different times, or can supply seawater to either the first dock 10 or the second dock 20 and allow seawater to flow into the other dock. The supply water pump 4 supplies seawater to the first dock 10 and the second dock 20 to make the inland water level (WLin) of the first dock 10 and the second dock 20 higher than the sea water level (WLout), thereby floating and lifting the ship 1 by the buoyancy of the seawater. The supply water pump 4 draws in seawater from the open sea and supplies it to the first dock 10 and / or the second dock 20. The feedwater pump 4 supplies seawater to the first dock 10 and the second dock 20, which have a large volume, to raise the inland water level (WLin) of the first dock 10 and the second dock 20, so that a pump with a low head and a high flow rate, such as a large centrifugal pump or a turbine pump, can be used to quickly raise the inland water level (WLin). The feedwater pump 4 operates a plurality of pumps simultaneously to supply seawater to the first dock 10 and the second dock 20, so that the inland water level (WLin) of the first dock 10 and the second dock 20 can be quickly raised. The feedwater pump 4 supplies seawater to the inland water level (WLin) at which the ship 1 can float on seawater and move from the first dock 10 to the second dock 20. The feedwater pump 4 can adjust the inland water level (WLin) according to the depth and step of the ship 1, the first dock 10 and the second dock 10, the external environment, and the like.

[0065] With the seawater supplied by the water supply pump 4 and the inner water level (WLin) raised, the ship 1 can safely move to the second dock 20 with little energy without the bottom of the ship touching the lifting bottom surface 21. However, the water supply pump 4 can also be in a state where it touches the bottom of the ship 1 on the lifting bottom surface 21, but reduces the substantial weight of the ship 1 by the buoyancy of the seawater and reduces the frictional resistance between the bottom of the ship 1 and the lifting bottom surface 21, so that the inner water level (WLin) allows the ship 1 to be moved from the first dock 10 to the second dock 10. Also, the water supply pump 4 can be set to an inner water level (WLin) that allows the ship 1 to be moved from the first dock 10 to the second dock 20 while the bottom of the ship 1 temporarily or slightly touches the lifting bottom surface 21. Even when the bottom of the ship 1 touches the lifting bottom surface 21, since the substantial weight is reduced by the buoyancy of the seawater, the ship 1 can be towed in this state and moved from the first dock 10 to a predetermined position of the second dock 20. (Drainage mechanism 5)

[0066] The drainage mechanism 5 discharges seawater from both the first dock 10 and the second dock 20, or from the first dock 10 or the second dock 20, puts the second dock 20 in a drained state, lowers the ship 1 floating in the seawater, and places the bottom of the ship on the sleeper 14 of the lifting bottom surface 21 of the second dock 20. The drainage mechanism 5 can use all mechanisms that can drain the seawater in the second dock 20 to a drained state. The drainage mechanism 5 can be composed of a mechanism for opening and closing the gate 2, or a drainage pump 5 and a mechanism for opening and closing the gate 2. The drainage mechanism 5 that can open and close the gate 2 to drain the seawater in the second dock 20 can be used for the second dock 20 with the lifting bottom surface 21 arranged at a position higher than the sea surface level (WLout). This second dock 20 closes the gate 2, supplies seawater to the first dock 10 to raise the inner water level (WLin) of the first dock 10, moves the ship 1 from the first dock 10 to the second dock 20 in this state, then opens the gate 2 to drain the seawater in the second dock 20 to the outside, thereby lowering the inner water level (WLin) and lowering the bottom of the ship 1 onto the lifting bottom surface 21. Although not shown, the gate can also be opened partially or stepwise to adjust the lowering of the inner water level (WLin).

[0067] The drainage mechanism 5, consisting of a drainage pump 5 and a mechanism for opening and closing the gate 2, closes the gate 2, supplies seawater to the first dock 10, raises the inland water level (WLin) of the first dock 10, and moves the ship 1 from the first dock 10 to the second dock 20, and then, while keeping the gate 2 closed (Figure 7) or opening the gate partially or in stages, operates the drainage pump 5 to discharge the seawater from the second dock 20, thereby lowering the inland water level (WLin) and lowering the bottom of the ship 1 to be placed on the lifting bottom surface 21. (Control Mechanism)

[0068] The control mechanism controls the opening and closing of the gate 2 and the operation of the feed water pump 4 and the drainage mechanism 5. The control mechanism opens the gate 2 and the ship 1 is docked in the first dock 10. With the ship 1 docked in the first dock 10, the control mechanism closes the gate 2 and sets the feed water pump 4 in operation, and the feed water pump 4 in operation supplies seawater to the first dock 10 and the second dock 20, so that the inland water level (WLin) of the first dock 10 and the second dock 20 rises higher than the seawater level (WLout), and the ship 1 floats on the seawater and is moved from the first dock 10 to the second dock 20. With the ship 1 moved from the first dock 10 to the second dock 20, the control mechanism closes the gate 2 and operates the drainage mechanism 5, which in turn drains the seawater in the second dock 20 to the drainage state, and the ship 1 is placed on the lifting bottom 21 and landed. The control mechanism may be any currently used control mechanism that can be used for the dismantling equipment 100, or any control mechanism that will be developed in the future. (Method of dismantling a ship)

[0069] The ship dismantling method includes the following ship docking process, seawater raising process, ship moving process, seawater drainage process, and ship cutting process, and the ship 1 is dismantled through the processes shown in Figures 4 to 7. (Dock process of Ship 1)

[0070] In the ship docking process, the ship 1 is docked in the first dock 10. In the ship docking process, the gate 2 is opened to allow seawater to flow into the first dock 10 (seawater inflow process), and the inland water level (WLin) of the first dock 10 is set to the same seawater level as the seawater level (WLout) outside the gate 2, and the ship 1, floating on seawater, passes through the open gate 2 and docks in the first dock 10 (FIG. 4). The ship 1 can be docked by moving straight ahead (forward) in the direction of travel, or the ship 1 can also be towed into dock. (Rising seawater process)

[0071] The seawater raising process raises the inland water level (WLin) of the first dock 10 and the second dock 20. In the ship docking process, with the ship 1 docked in the first dock 10, the gate 2 is closed (Fig. 5), seawater is supplied to the first dock 10 and the second dock 20 by the water supply pump 4, the inland water level (WLin) of the first dock 10 and the second dock 20 is raised, and the ship 1 is raised while floating by buoyancy (Fig. 6). The seawater raising process raises the inland water level (WLin) of the first dock 10 and the second dock 20 to a height at which the ship 1 can move from the first dock 10 to the second dock 20 while floating on seawater (Fig. 6). One or more supply water pumps 4 can supply seawater to both the first dock 10 and the second dock 20 simultaneously, or can supply seawater to either the first dock 10 or the second dock 20 and allow seawater to flow into the other dock. (Ship movement process)

[0072] In the ship moving process, the ship 1 is moved from the first dock 10 to the second dock 20. In the ship moving process, the ship 1, which has surfaced and been lifted to the inland water level (WLin) raised in the seawater rising process, is moved from the first dock 10 to the second dock 20 while still floating on the seawater (FIG. 6). The ship 1 can be docked by moving straight ahead in the direction of travel, and the ship can also be towed from the first dock 10 to the second dock 20. (Seawater drainage process)

[0073] In the seawater discharge step, the second dock 20 is put into a discharged state. In the seawater discharge step, the discharge mechanism 5 (drainage pump 5A) is put into an operating state in a state in which the ship 1 is moved to the second dock 20 in the ship moving step, and the seawater in the second dock 20 is discharged to lower the inner water level (WLin) of the second dock 20 (FIG. 7). As the inner water level (WLin) of the second dock 20 is lowered, the position of the ship 1 floating on the seawater is gradually lowered, the second dock 20 is put into a discharged state, the bottom of the ship 1 comes into contact with and touches the lifting bottom surface 21 of the second dock 20, the lifting bottom surface 21 is exposed from the seawater, the ship 1 is placed on the lifting bottom surface 21, and the ship 1 is landed (FIG. 7). The discharged state of the second dock 20 refers to a state in which the seawater in the second dock 20 is discharged at least until the ship 1 is placed on the lifting bottom surface 21. The bottom of the ship 1 can also be placed on a cushioning material such as a wooden block on the lifting bottom surface 21 and landed. (Ship cutting process)

[0074] In the ship cutting process, the ship 1 is cut and dismantled. In the ship cutting process, the ship 1 is placed on the lifting bottom 21 and landed, and then cut and dismantled by the dismantling mechanism 30 (FIGS. 7 and 3). The dismantling mechanism 30 can dismantle the ship 1 to the final stage within the second dock 20, but can also transport the cut and dismantled parts to the outside of the second dock 20 each time. For example, the dismantling mechanism 30 cuts and crushes the ship 1 into cut pieces and crushed pieces of a size that can be transported and moved by the cutting heavy machine 31, and the cut pieces are lifted by a crane such as a crawler crane or a gantry crane and transported to the outside of the second dock 20, and can be loaded onto a transport vehicle such as a dump truck traveling on the work deck 25 for transport, and cut into smaller pieces and dismantled at a predetermined location. In this dismantling method, the ship 1 is dismantled and cut into pieces of transportable size and then transported out of the second dock 20 one after another, thereby shortening the time that the ships 1 being dismantled occupy the second dock 20 and making the dismantling of the ships 1 more efficient and shorter. The cut pieces transported out of the second dock 20 can also be transported to a waste treatment facility for treatment as necessary. (Embodiment 2)

[0075] 10 to 13 show a ship dismantling apparatus 200 according to the second embodiment. In the ship dismantling apparatus 100 according to the first embodiment shown in FIG. 1, the first dock 10 and the second dock 20 are arranged in a straight line in the fore-aft direction of the ship 1, but the arrangement and relative position of the first dock 10 and the second dock 20 are not limited thereto, and the first dock 10 and the second dock 20 can be arranged in a direction other than the fore-aft direction of the ship 1 so that the ship 1 can be floated and moved by seawater adjacent to each other and adjacent to each other. For example, in the ship dismantling apparatus 200 shown in FIG. 10, the first dock 10 and the second dock 20 are arranged adjacent to each other in the width direction of the ship 1. In the dismantling apparatus 200, the first dock 10 and the second dock 20 are arranged side by side in a parallel posture. In the dismantling apparatus 200, the short sides of the first dock 10 and the second dock 20 are arranged in a straight line, and the long sides of each dock are arranged parallel to each other. In the dismantling device 200 of FIG. 2, the second dock 20 is disposed beside the first dock 10, and the side edges of the second dock 20 and the first dock 10 are disposed adjacent to each other.

[0076] In the ship moving process, the ship dismantling apparatus 200 in FIG. 10 moves the ship 1 in the width direction (the horizontal direction indicated by the arrow in the figure, perpendicular to the direction of sailing, the width direction of the ship 1) and moves it from the first dock 10 to the second dock 20. The dismantling apparatus 200 can shorten the moving distance of the ship 1 from the first dock 10 to the second dock 20 compared to the dismantling apparatus 100, and can also shorten the overall length (long side) of the ship dismantling apparatus 200 and make it compact. The dismantling apparatus 200 is similar to the dismantling apparatus 100 except for the arrangement of the first dock 10 and the second dock 20 and the moving direction of the ship 1 from the first dock 10 to the second dock 20, and the above description is applicable.

[0077] 11 to 13 show each process of the dismantling device 200. The gate 2 of the first dock 10 is opened to allow seawater to flow into the first dock 10, the inland water level (WLin) of the first dock 10 is made flush with the seawater level (WLout), and the ship 1 is docked in the first dock 10 (FIG. 11, ship docking process). The gate 2 is closed, seawater is sucked in by the water supply pump 4 to supply seawater to the first dock 10 and / or the second dock 20, the inland water level (WLin) of the first dock 10 and the second dock 20 is raised, and the ship 1 is lifted up to a position where it can be moved from the first dock 10 to the second dock 20 while floating on the seawater by buoyancy (FIG. 12, seawater raising process). While floating on seawater, the ship 1 is moved laterally (in the width direction of the ship 1) from the first dock 10 to the second dock 20 (FIG. 12, ship moving process). The seawater in the second dock 20 is drained by the drainage mechanism 5 (drainage pump 5A) to lower the inland water level (WLin) of the second dock 20, and the bottom of the ship 1 is placed on the lifting bottom surface 21 and landed (FIG. 13, seawater drainage process), and the dismantling mechanism 30 dismantles the ship 1 (FIG. 13, ship cutting process). (Embodiments 3 and 4)

[0078] FIG. 14 shows a ship dismantling apparatus 300 according to the third embodiment, and FIG. 15 shows a ship dismantling apparatus 400 according to the fourth embodiment. One or more first docks 10 or second docks 20 can be provided. The first docks 10 or second docks 20 can also be sized and shaped to accommodate a plurality of ships 1. The ship dismantling apparatuses 100 and 200 in FIG. 1 and FIG. 10 have one second dock 20 arranged adjacent to one first dock 10, while the ship dismantling apparatuses 300 and 400 in FIG. 14 and FIG. 15 have a plurality of second docks 20 (three sets in FIG. 14 and two sets in FIG. 15) arranged adjacent to one first dock 10. The ship dismantling apparatuses 300 and 400 equipped with a plurality of second docks 20 can simultaneously carry out dismantling work for a plurality of ships 1 in each second dock 20 in parallel, and can efficiently dismantle the ships 1. The dismantling devices 300, 400 are similar to the dismantling devices 100, 200 except for the arrangement and number of the first dock 10 and the second dock 20, and the direction in which the ship 1 moves from the first dock 10 to the second dock 20, and the above description applies.

[0079] 14, a ship dismantling apparatus 300 has three sets of second docks 20A, 20B, 20C arranged adjacent to one first dock 10. In the ship dismantling apparatus 300 shown in the figure, the second dock 20A is arranged in a straight line in the fore-and-aft direction of the ship 1 relative to the first dock 10, the second dock 20B is arranged in a parallel position in the width direction of the ship 1 relative to the first dock 10, and the second dock 20C is arranged on an extension of the diagonal of the first dock 10 in the diagonal direction of the ship 1 relative to the first dock 10.

[0080] In the ship dismantling equipment 300 of Fig. 14, the second docks 20A, 20B, and 20C are arranged adjacent to each other in the longitudinal direction, the transverse direction, and the diagonal direction of the first dock 10. To the second dock 20A arranged in a straight line in the longitudinal direction of the first dock 10, the ship 1 is moved in the fore-and-aft direction from the first dock 10 to the second dock 20A as in Fig. 1, and to the second dock 20B arranged beside the first dock 10, the ship 1 is moved in the lateral direction from the first dock 10 to the second dock 20B as in Fig. 10. To the second dock 20C arranged diagonally from the first dock 10, the ship 1 can be moved once in the fore-and-aft direction and then in the lateral direction, and once in the lateral direction and then in the fore-and-aft direction, or can be moved directly in the diagonal direction from the first dock 10 to the second dock 20C. In the case where there are a plurality of second docks 20 (20A, 20B, 20C), the next ship 1 can be docked in the first dock 10 (or the ship 1 on standby in the first dock 10) and moved to another second dock 20 without waiting for the completion of dismantling of the ship 1 docked in a certain second dock 20, and the efficiency of dismantling the ship 1 can be further improved. This is because while the ship 1 occupies a certain second dock 20, another process can be performed in parallel at the same time in another second dock 20. For example, the ship 1 can be first moved to the second dock 20A at the back side, and the discharging process and the cutting process can be performed in advance in the second dock 20A, while the ship 1 can be moved to the other second docks 20B and 20C in sequence, and each process can be performed in each second dock 20B and 20C in sequence. The efficiency of dismantling can also be improved by selecting the second dock 20 to move to depending on the time required for dismantling. The first dock 10 or the second dock 20 may be sized and shaped to accommodate multiple vessels 1. For example, the vessels 1 may be moved from the first dock 10 to each of the second docks 20 sequentially or simultaneously. Also, multiple vessels 1 may be moved to one second dock 20.

[0081] The second dock 20 may have an intermediate gate 3 at the boundary with the first dock 10 or at the boundary with another adjacent second dock 20. The intermediate gate 3 allows the inner water level (WLin) in the first dock 10 and the second dock 20 to be at different heights, and the inner water level (WLin) in each second dock 20 to be at different heights, so that the same or different processes can be performed in each second dock 20 or the first dock 10, and the ship 1 can be efficiently dismantled. The second dock 20 may have a peripheral wall 23 around the periphery except for the boundary with the adjacent first dock 10, and the ship 1 can be efficiently dismantled.

[0082] The ship dismantling apparatus 400 of FIG. 15 arranges the first dock 10 and the second docks 20D, 20E side by side in a parallel posture on both the left and right sides of the width direction of the ship 1. The dismantling apparatus 400 can dismantle the ship 1 more efficiently with the multiple second docks 20D, 20E while keeping the overall length compact. The dismantling apparatus 400 arranges two sets of second docks 20D, 20E adjacent to each other on both the left and right sides of one first dock 10. The ship dismantling apparatus 400 of FIG. 15 moves the ship 1 sequentially to one of the second docks 20D, 20E on the left and right sides first and then the other, and can sequentially perform each process at each of the second docks 20D, 20E, thereby improving the efficiency of dismantling the ship 1.

[0083] For example, the ship 1 can be moved to the second dock 20D on the left side first, and the intermediate gate 3 can be closed to proceed with the discharge process and the cutting process in advance, while the next ship 1 is docked in the first dock 10 and moved to the second dock 20E on the right side, and each process can be carried out in each of the second docks 20D and 20E. Furthermore, while each process is being carried out in each of the second docks 20D and 20E, the next ship 1 can be docked in the first dock 10, and the ship 1 can be made ready to be moved to any of the second docks 20D and 20E. The ship 1 ready to be moved in the first dock 10 can be quickly moved to any of the second docks 20D and 20E that have already completed the cutting process and dismantling by supplying seawater with the feedwater pump 4 or by having seawater supplied from the first dock 10. By moving the ship 1 alternately to the second docks 20D and 20E, it is possible to contribute to the efficiency, shortening of the time required for docking, moving, and dismantling, and to the improvement of safety. By providing an intermediate gate 3 at the boundary between the second dock 20 and the first dock 10, the inland water level (WLin) in the first dock 10 and each of the second docks 20 (20D, 20E) can be set to different heights, making it easier to carry out different or the same process in the first dock 10 and each of the second docks 20 (20D, 20E), and the ship 1 can be dismantled more efficiently. Similarly to the above, the first dock 10 or the second dock 20 can be sized and shaped to accommodate multiple ships 1, and for example, multiple ships 1 docked in the first dock 10 can be moved sequentially or simultaneously to the second docks 20D and 20E on both the left and right sides. [Industrial Applicability]

[0084] The ship dismantling method and apparatus disclosed herein have an extremely simple structure, can easily and safely unload ultra-large ships from seawater, and can be dismantled efficiently and safely, and can be particularly effectively used in the dismantling of ultra-large ships, and can be used to make effective use of the steel plates and other materials from the dismantled ships. [Explanation of symbols]

[0085] 100, 200, 300, 400... (ship) dismantling equipment 1...Ship 2. Gate 3...Intermediate gate 4. Water supply pump 5…Drainage mechanism 5A…Drainage pump 6…Discharge groove 10…First Dock 11…Bottom of dock 20…Second dock 21…Lifting bottom surface 22…Step 23...peripheral wall 25…Work deck 30…Demolition mechanism 31…Heavy cutting equipment 32... Heavy discharge equipment WLin: Inland water level WLout: Sea level GL: Grand Line

Claims

1. A first dock having a gate that can be opened and closed at the entrance of a ship; in communication with the first dock; and A second dock having a ship lifting bottom disposed at a position higher than the dock bottom of the first dock; a water supply pump for supplying seawater to the first dock and the second dock; Draining the seawater from the second dock, a drainage mechanism for placing the second dock in a drainage state and loading the ship onto the lifting bottom surface; and a dismantling mechanism for cutting the ship placed on the lifting bottom surface of the second dock.

1. A method of dismantling a ship, comprising the steps of: The gate is opened, and the inland water level (WLin) of the first dock is set to the sea water level (WLout) of the ocean, a ship docking process of docking a ship into the first dock; In the docking process, while the ship is docked in the first dock, closing the gate and supplying seawater to the first dock and the second dock; a seawater raising step for raising an inland water level (WLin) of the first dock and the second dock to lift a ship; With the ship lifted in the seawater raising process, a ship moving step of floating the ship on seawater and moving it from the first dock to the second dock; After the ship is moved to the second dock in the ship moving step, Discharging seawater from the second dock by the drainage mechanism, a step of discharging seawater by placing a ship on the lifting bottom and discharging the seawater from the second dock; and a ship dismantling step of cutting the ship placed on the lifting bottom surface of the second dock in a drained state by the dismantling mechanism.

2. A ship dismantling method according to claim 1, comprising the steps of: The first dock and the second dock are arranged in a straight line in a fore-aft direction of the ship, In the moving step, Move the vessel forward and backward, A method for breaking up a ship moving from the first dock to the second dock.

3. A ship dismantling method according to claim 1, comprising the steps of: The first dock and the second dock are disposed adjacent to each other in a parallel orientation, In the moving step, Moving the vessel widthwise, A method for breaking up a ship moving from the first dock to the second dock.

4. 2. A ship dismantling method according to claim 1, comprising the steps of: The lifted bottom surface is Inclining downwardly toward the boundary with the first dock, A method for dismantling a ship, comprising: allowing wastewater from a ship being dismantled to flow down toward the first dock and discharging it to the outside.

5. A ship dismantling method according to claim 4, At the boundary between the second dock and the first dock, By providing a drain for the ship's waste liquid, A ship dismantling method comprising discharging waste liquid through the drain.

6. 2. A ship dismantling method according to claim 1, comprising the steps of: The lifting bottom surface of the second dock is inclined downward in the width direction of the ship, A ship dismantling method in which waste liquid flowing down to the side or center of the lifted bottom is discharged.

7. a first dock having a gate at an entrance for docking ships; coupled to the first dock; and a second dock having a raised bottom surface disposed at a position higher than the bottom surface of the first dock; supplying seawater to the first dock and the second dock with the gate in a closed state; a water supply pump for raising the inland water level (WLin) of the first dock and the second dock higher than the sea water level (WLout); a drainage mechanism for placing the second dock in a drainage state and placing the ship on the lifting bottom surface; a dismantling mechanism for cutting the ship placed on the lifting bottom surface of the second dock in a drained state; a control mechanism for controlling opening and closing of the gate and operation of the water supply pump and the drainage mechanism, The control mechanism comprises: the gate is opened and the ship is docked in the first dock; With the gate in a closed state and the water supply pump in an operating state, The water supply pump supplies seawater to the first dock and the second dock, The inland water level (WLin) of the first dock and the second dock is raised higher than the sea water level (WLout), a vessel is moved from the first dock to the second dock while floating in seawater; The control mechanism operates the drainage mechanism, The second dock is placed in a draining state with the ship placed on the lifting bottom surface, The dismantling mechanism includes: A ship dismantling device for dismantling a ship placed on the lifting bottom surface of the second dock in a drained state.

8. The ship dismantling apparatus according to claim 7, A ship dismantling apparatus, wherein the first dock and the second dock are arranged in a straight line in the fore-aft direction of the ship.

9. The ship dismantling apparatus according to claim 7, A ship dismantling installation in which the first dock and the second dock are arranged adjacent to each other in a parallel posture.

10. The ship dismantling apparatus according to claim 7, A ship dismantling apparatus, wherein the first dock has a total length of 300 m or more.

11. The ship dismantling apparatus according to claim 7, The second dock has a peripheral wall therearound.

12. The ship dismantling apparatus according to claim 7, The lifting bottom surface is A ship dismantling device which is inclined downwardly toward the boundary with the first dock.

13. The ship dismantling apparatus according to claim 7, A ship dismantling device, wherein the first dock has a depth of 10 m or more and the second dock has a depth of 3 m or more.

Images