Mobile dock

Abstract

To provide a mobile dock capable of realizing a dry dock regardless of environments.SOLUTION: A mobile dock comprises a floating body unit extending in the horizontal direction, a side wall part rising from the floating body unit and also forming a dock space on a floating body, capable of accommodating a ship, an opening / closing part movable between the opening position to open the dock space horizontally and the closing position to block / close the dock space horizontally, and a drainage part capable of draining the water in the dock space outside the dock space. As a result, the inside of the dock space can be used as a dry dock.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a mobile dock.

Background Art

[0002] Patent Document 1 discloses an example of a floating dock. This floating dock has a U-shaped vertical cross-sectional shape, and the inside of the U-shape is a dock space for ship repair and the like. The floating dock can adjust its buoyancy by means of ballast tanks. When introducing a ship into the dock space, the buoyancy is adjusted so that the upper surface of the floating dock is located below the water surface, and the ship is introduced into the dock space.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when performing work smoothly in the dock, it is preferably in a state where seawater is completely discharged from the dock (dry dock). However, in the floating dock of Patent Document 1 above, since the dock space is exposed to the outside, it is difficult to prevent the intrusion of seawater in an environment with high waves.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to provide a mobile dock capable of realizing a dry dock regardless of the environment.

Means for Solving the Problems

[0006] In order to solve the above problems, the mobile dock according to the present disclosure includes a floating unit extending in the horizontal direction, a side wall portion rising from the floating unit and forming a dock space capable of accommodating a ship on the floating body, an opening / closing portion movable between an open position for horizontally opening the dock space and a closing position for horizontally blocking the dock space, and a drainage portion capable of discharging water in the dock space to the outside of the dock space.

Advantages of the Invention

[0007] According to the present disclosure, a dry dock can be realized regardless of the environment.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0009] <First Embodiment> Hereinafter, a first embodiment of the present disclosure will be described in detail with reference to the drawings. As shown in FIGS. 1 to 4, the mobile dock 1 of the present embodiment is used for performing repair work on a ship S or the like in the ocean (which may be a water area such as a lake or a river). Note that the mobile dock 1 may be used for building a new ship S.

[0010] The mobile dock 1 includes a floating unit 10, side wall portions 20, a deck 22, an opening / closing portion 30, a living area 40, a generator room 41, a mobile crane 42, a drainage portion 50, and a water injection portion 60.

[0011] <Floating unit 10> The floating unit 10 is a part that serves as the base of the mobile dock 1 and is composed of a floating body 11 that can float on the water surface. The floating body 11 is, for example, in the shape of a block with a hollow interior. In this embodiment, the floating unit 10 is constituted by connecting a plurality of floating bodies 11 in the horizontal direction. Note that the floating unit 10 may be constituted by a single floating body 11.

[0012] The floating unit 10 extends so as to spread in the horizontal direction and has a rectangular shape in plan view. The floating unit 10 is a so-called barge and has an upper surface 10a along the horizontal plane. The floating unit 10 has a predetermined thickness in the horizontal direction. Hereinafter, the direction along the long side of the rectangular shape is referred to as the front-rear direction, and the direction along the short side is referred to as the width direction. Note that the front-rear direction and the width direction may be arbitrarily defined as long as they are orthogonal to each other along the horizontal plane.

[0013] <Side wall portions 20> The side wall portions 20 are portions provided so as to rise from the floating unit 10. In this embodiment, a pair of side wall portions 20 are provided at intervals in the width direction of the floating unit 10. The side wall portions 20 extend in the front-rear direction along the long side of the rectangular shape of the floating unit 10 in plan view. That is, the pair of side wall portions 20 are arranged at intervals from each other at the widthwise ends of the floating unit 10, rise upward from the upper surface 10a of the floating unit 10, and extend over the front-rear direction of the floating unit 10.

[0014] The surfaces facing the inner side in the width direction of the side wall portions 20 (the surfaces facing each other in the pair of side wall portions 20) are inner surfaces 20a having a planar shape extending in the vertical direction and the front-rear direction. The surface facing the outer side in the width direction in the side wall portion 20 (the surface opposite to the inner surface 20a) is an outer surface 20b that is planar and extends in the vertical direction and the front-rear direction. The inner surface 20a and the outer surface 20b extend parallel to each other. The surface connecting the inner surface 20a and the outer surface 20b at the upper end in the side wall portion 20 is an upper end surface 20c that extends in the width direction and the front-rear direction. The upper end surface 20c is a flat surface parallel to the horizontal plane.

[0015] Inside the side wall portion 20, a ballast tank 21 is provided. The ballast tank 21, in which a space is formed inside, is configured such that seawater can be introduced from the outside into the inner space and discharged from the inner space to the outside by a ballast pump (not shown). By adjusting the amount of seawater in the ballast tank 21, the buoyancy of the mobile dock 1 is adjusted.

[0016] Note that the ballast tank 21 may be provided not only in the side wall portion 20 but also inside the floating body unit 10. Further, the ballast tank 21 may be provided inside the floating body unit 10 instead of the side wall portion 20. That is, the ballast tank 21 may be provided inside at least one of the side wall portion 20 and the floating body unit 10.

[0017] The region partitioned by the upper surface 10a of the floating body unit 10 and the inner surface 20a of the pair of side wall portions 20 is a dock space R capable of accommodating the ship S. That is, the region inside the U-shaped floating body unit 10 and the pair of side wall portions 20 is the dock space R.

[0018] Note that, for example, lighting equipment is provided on the inner surface 20a of the side wall portion 20. The dock space R is illuminated by the lighting equipment.

[0019] <Keel block 22> A plurality of keel blocks 22 are provided at intervals in the front-rear direction on the upper surface 10a of the floating body unit 10 in the dock space R. The ship S accommodated in the dock space R is placed so as to span the upper ends of these plurality of keel blocks 22.

[0020] <Closing part 30> The closing part 30 is a facility that closes or opens the dock space R from the outside. The closing part 30 of this embodiment is composed of a first closing part 31 and a second closing part 32.

[0021] <First closing part 31> A pair of first closing parts 31 are provided so as to be located at both ends in the front-rear direction of the floating unit 10. The first closing part 31 is provided so as to be rotatable around a first axis O1 extending in the width direction at the end in the front-rear direction of the floating unit 10. The first closing part 31 has a flat plate shape extending radially outward from the first axis O1 and extending in the width direction.

[0022] The first closing part 31 rotates around the first axis O1 between a closed position extending upward from the first axis O1 and an open position extending horizontally outward from the first axis O1 to the outside of the dock space R. The height of the upper end of the first closing part 31 in the closed position is the same as the upper end surface 20c of the pair of side wall parts 20.

[0023] The edge parts on both sides in the width direction of the first closing part 31 in the closed position are in close contact with the pair of side wall parts 20. That is, the first closing part 31 and the pair of side wall parts 20 are in liquid-tight contact via a sealing part (not shown). In addition, the portion between the lower end of the first closing part 31 in the closed position and the floating unit 10 is also in liquid-tight contact in the same manner. Thereby, the first closing part 31 horizontally blocks the dock space R from the ocean. When the pair of first closing parts 31 are in the closed position, the dock space R is in a state of being liquid-tightly separated from the ocean over the entire horizontal direction and up to the range of the upper ends of the side wall parts 20 and the first closing part 31.

[0024] The first closing part 31 in the open position projects horizontally outward from the first axis O1 toward the outside of the dock space R in the front-rear direction. Thereby, the dock space R is in a state where the ends in the front-rear direction are open toward the ocean.

[0025] <Second opening / closing part 32> A pair of second opening / closing parts 32 are provided so as to correspond to the pair of first opening / closing parts 31. Each second opening / closing part 32 is provided inside the dock space R rather than the corresponding first opening / closing part 31. The second opening / closing part 32 is provided rotatably around a second axis O2 that extends in the width direction along the upper surface 10a of the floating body unit 10 inside the dock space R rather than the first axis O1. The second opening / closing part 32 is also in a flat plate shape like the first opening / closing part 31, and is rotatable between a closed position extending upward from the second axis O2 and an open position horizontally protruding outside the dock space R from the second axis O2.

[0026] The edge parts on both sides in the width direction of the second opening / closing part 32 are arranged at intervals from the inner surface 20a of the side wall part 20. That is, the second opening / closing part 32 is not in liquid-tight contact with the side wall part 20 like the first opening / closing part 31. Also, the height of the upper end of the second opening / closing part 32 in the closed position is set lower than the height of the side wall part 20. The first opening / closing part 31 and the second opening / closing part 32 can be opened and closed respectively by a driving device (not shown).

[0027] <Residential area 40> The residential area 40 is provided so as to protrude further upward from the upper end surface 20c of the side wall part 20. The residential area 40 is a building for workers and the like who work in the mobile dock 1 to live in. The residential area 40 is provided on one of the pair of side wall parts 20.

[0028] <Generator room 41> The generator room 41 is provided so as to protrude further upward from the upper end surface 20c of the side wall part 20. A generator for generating electric power necessary for various pumps, lighting equipment, driving devices of the opening / closing part 30, and other devices provided in the mobile dock 1 is provided in the generator room 41. The generator room 41 is provided on the other side wall part 20 of the pair of side wall parts 20.

[0029] <Mobile crane 42> The mobile crane 42 is provided on the upper end surfaces 20c of a pair of side wall portions 20, respectively. The mobile crane 42 is movable in the front-rear direction along the upper end surface 20c of the side wall portion 20 by means of a carriage. The mobile crane 42 has an arm and a hook that can access the ship S accommodated in the dock space R.

[0030] <Drainage section 50> As shown in FIG. 4, the drainage section 50 is configured to be able to discharge seawater from the dock space R to the outside. The drainage section 50 has a drain pipe 52 and a drainage pump 51. One end of the drain pipe 52 opens on the upper surface 10a of the floating unit 10. The drain pipe 52 extends from one end through the inside of the floating unit 10 to the inside of the side wall portion 20, and the other end opens on the outer surface 20b of the side wall portion 20. The height of the other end of the drain pipe 52 is positioned above the sea level.

[0031] A drainage pump 51 is provided in the middle of the drain pipe 52. The drainage pump 51 is provided on the upper end surface 20c of the side wall portion 20. When the drainage pump 51 is driven, seawater can be transferred from one end of the drain pipe 52 to the other end.

[0032] <Water injection section 60> As shown in FIG. 4, the water injection section 60 is configured to be able to supply seawater from the outside into the dock space R. The water injection section 60 has a water injection pipe 62 and a water injection pump 61. One end of the water injection pipe 62 opens downward outside the side wall portion 20. The height of one end of the water injection pipe 62 is located below the sea level. The water injection pipe 62 extends upward along the outer surface 20b of the side wall portion 20 from one end. The water injection pipe 62 further extends inward in the width direction along the upper end surface 20c of the side wall portion 20. The water injection pipe 62 further extends downward along the inner surface 20a of the side wall portion 20, and the other end opens downward. That is, the other end of the water injection pipe 62 opens downward in the dock space R.

[0033] In the middle of the water injection pipe 62, a water injection pump 61 is provided. The water injection pump 61 is provided on the upper end surface 20c of the side wall portion 20. By driving the water injection pump 61, seawater can be transferred from one end of the water injection pipe 62 to the other end.

[0034] Note that as the water injection part 60, a configuration in which the water injection pump 61 is provided inside the side wall part 20 may be adopted as in the case of the drainage part 50 described above. In this case, one end of the water injection pipe 62 opens, for example, on the outer surface 20b of the floating unit 10, and seawater is taken in from the opening. Also, the other end of the water injection pipe 62 extends from the inner surface 20a of the side wall part 20 into the dock space R and opens downward. Thus, by driving the water injection pump 61, seawater can be transferred from one end of the water injection pipe 62 to the other end.

[0035] <Function and effect> The mobile dock 1 configured as described above is moved to the destination by being towed, for example, by a ship S with the opening / closing part 30 in the closed position. Thereby, repair and new construction of the ship S in waters where there is no dock become possible. The ship S is introduced into the dock space R of the mobile dock 1 according to the following procedure. First, the first opening / closing part 31 and the second opening / closing part 32 are sequentially moved from the closed position to the open position. Thereby, the dock space R is in a state of being horizontally open toward the ocean. Note that instead of setting both the opening / closing parts 30 at both ends in the front-rear direction to the open position, only the opening / closing part 30 in one direction in the front-rear direction may be set to the open position.

[0036] By adjusting the buoyancy with the ballast tank 21, the upper surface 10a of the floating unit 10 is lowered below the sea surface. Thereby, seawater enters the dock space R from the front and rear directions. Then, the height position of the upper surface 10a of the floating unit 10 is lowered to a position deeper than the bottom of the ship S to be introduced. Thereby, the lower part of the dock space R is in a state of being immersed in seawater.

[0037] Next, the ship S to be repaired is introduced into the dock space R from the front and rear directions by self-propelling or being towed by another ship S. The introduced ship S is moved onto the keel 22 on the upper surface 10a of the floating unit 10.

[0038] And in this state, the second opening / closing part 32 and the first opening / closing part 31 are sequentially rotated from the open position to the closed position. As a result, the dock space R is in a state of being isolated from the ocean. After that, by driving the drainage pump 51 in the drainage part 50, the seawater in the dock space R is discharged to the outside. As a result, the ship S is in a state of being supported from below by the keel 22, and the dock space R is in a dry state without seawater. Thereby, repair work by workers can be carried out with the dock space R as a dry dock.

[0039] After the repair work is completed, seawater is introduced into the dock space R through the water injection part 60. That is, by driving the water injection pump 61, seawater is supplied into the dock space R through the water injection pipe 62. For example, when the seawater is supplied into the dock space R up to the height of the waterline of the ship S that was the repair target, the water injection work is completed by the water injection part 60. After that, by rotating the first opening / closing part 31 and the second opening / closing part 32 in this order from the closed position to the open position, the dock space R is in a state of being opened to the ocean. Thereby, the repaired ship S can leave the port to the ocean leaving the mobile dock 1 behind.

[0040] As described above, according to the mobile dock 1 of the present embodiment, by towing the mobile dock 1, a repair area for the ship S can be constructed in a water area where there is no dock. Therefore, the construction cost of the dock can be suppressed.

[0041] Also, by setting the opening / closing part 30 to the closed position, the dock space R can be blocked from the ocean. Then, by draining the water in the dock space R by the drainage part 50 afterwards, a state of a dry dock where there is no seawater in the dock space R can be realized. Thereby, the workability of the workers can be improved, and even when the waves are high during stormy weather or the like, it is possible to avoid the waves entering the dock space R.

[0042] Furthermore, by providing the ballast tank 21 on one of the floating unit 10 and the side wall part 20, the buoyancy of the entire mobile dock 1 can be adjusted. Therefore, when the floating unit 10 is moving, by increasing the buoyancy, the water resistance during towing can be reduced. Also, when repairing the ship S, by positioning the dock space R higher than the sea surface, the intrusion of seawater into the dock space R can be further suppressed.

[0043] On the other hand, by reducing the buoyancy and deliberately sinking the floating unit 10 into the seawater, the water pressure can be made to act on the first opening / closing part 31 from the outside towards the inside. Thereby, the adhesion between the first opening / closing part 31 and the side wall part 20 can be improved, and the sealing performance between them can be improved. Furthermore, when moving the first opening / closing part 31 from the closed position to the open position, by positioning the first opening / closing part 31 above the sea surface, the influence of the water pressure of seawater from the outside can be eliminated, and the power required to move it to the open position can be reduced.

[0044] Also, since the water injection part 60 is provided, water can be injected into the dock space R after repairing the ship S. At this time, when the floating unit 10 is submerged below the sea surface, the pressure balance between the inside of the dock space R and the seawater can be adjusted. Therefore, the power required for the subsequent opening operation of the opening / closing part 30 can be reduced.

[0045] Furthermore, in the present embodiment, since the opening / closing part 30 includes the second opening / closing part 32 in addition to the first opening / closing part 31, redundancy can be ensured. That is, even if seawater breaks through the first opening / closing part 31 by any chance, the second opening / closing part 32 is standing by thereafter. Therefore, it is possible to avoid the entire dock space R from being immediately flooded. Accordingly, evacuation of workers and the like can be carried out during that time, and safety can be ensured.

[0046] In addition, since the crane can move in the front-rear direction over the entire side wall part 20, repair work on the ship S accommodated in the dock space R can be easily performed. Further, since the crane is provided on the upper end surface 20c of the side wall part 20 where it does not get flooded, the maintainability of the crane can be improved.

[0047] <Second Embodiment> Next, a second embodiment of the present disclosure will be described with reference to FIG. 5. In FIG. 5, the same components as those in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof will be omitted. Note that the new configuration shown in FIG. 5 is provided in addition to FIGS. 1 to 4.

[0048] The mobile dock 1 of the second embodiment includes a top plate part 70, a partition plate 72, and a self-propelled device 80 in addition to the components of the first embodiment.

[0049] <Top Plate Part 70> The top plate part 70 is provided so as to cover the accommodation space from above. The top plate part 70 has a flat plate shape extending in the horizontal direction. The top plate part 70 is provided over the upper end surfaces 20c of the pair of side wall parts 20 and in the front-rear direction of these side wall parts 20. Thereby, when the opening / closing part 30 is in the closed state, the top plate part 70 closes the opening above the dock space R.

[0050] Therefore, when the ship S is being repaired, the ship S existing in the dock space R cannot be visually recognized from the outside. Therefore, the confidentiality during the operation can be ensured and information leakage can be avoided. In addition, due to the presence of the top plate portion 70, even in bad weather such as rainy days, the workers in the dock space R can continue to carry out the work. That is, the working environment can be improved.

[0051] <Partition plate 72> The partition plate 72 is provided, for example, at the central portion in the front-rear direction within the dock space R so as to protrude upward and extend across the pair of side wall portions 20. Thereby, the dock space R is divided into two front and rear spaces. Thereby, different ships S can be simultaneously accommodated in each of the divided spaces. Therefore, repair work can be carried out on a plurality of ships S at the same time, and workability can be improved.

[0052] The self-propelling device 80 is a device for self-propelling without the mobile dock 1 being towed. In the present embodiment, the self-propelling device 80 is constituted by a propeller 81 and a rudder 82 provided on the floating unit 10. The propeller 81 is configured to be rotationally drivable about an axis extending in the horizontal direction. As the drive source of the propeller 81, an engine or a motor is adopted.

[0053] The rudder 82 is provided behind the propeller 81 and is rotatable about a vertical axis. By rotating the rudder 82 when the propeller 81 is driven, the mobile dock 1 can be turned in an arbitrary direction.

[0054] Thereby, even when it is not possible to arrange the ship S to be towed, the mobile dock 1 can be moved to the required water area. Note that normally, under the operation of towing the mobile dock 1 with another ship S, the mobile dock 1 may be configured to be self-propelled by the self-propelling device 80 only in an emergency or the like.

[0055] <Other embodiments> As described above, each embodiment of the present disclosure has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within the scope not departing from the gist of the present disclosure are also included.

[0056] <Supplementary Note> The mobile dock 1 described in each embodiment can be understood as follows, for example.

[0057] The mobile dock 1 of (1) includes a floating unit 10 extending in the horizontal direction, a side wall portion 20 rising from the floating unit 10 and forming a dock space R capable of accommodating a ship S on the floating body 11, an opening / closing portion 30 movable between an open position for horizontally opening the dock space R and a closed position for blocking the dock space R from the horizontal direction, and a drainage portion 50 capable of discharging water in the dock space R to the outside of the dock space R.

[0058] Thereby, after guiding the ship S into the dock space R with the opening / closing portion 30 in the open state, the dock space R can be blocked from the ocean by setting the opening / closing portion 30 to the closed position. Further, thereafter, a dry dock can be realized by discharging the water in the dock space R by the drainage portion 50.

[0059] The mobile dock 1 of (2) is the mobile dock 1 of (1) provided with a ballast tank 21 provided inside at least one of the floating unit 10 and the side wall portion 20 and capable of adjusting buoyancy.

[0060] Thereby, when guiding the ship S to the mobile dock 1, the upper surface 10a of the floating unit 10 can be positioned below the water surface. Further, at the time of repairing the ship S, by positioning the dock space R higher than the water surface, intrusion of seawater can be further suppressed.

[0061] The mobile dock 1 of (3) is the mobile dock 1 of (1) or (2) provided with a water injection portion 60 capable of supplying water into the dock space R.

[0062] By filling water into the dock space R after the repair of the ship S, the pressure balance between the inside of the dock space R and the seawater can be adjusted. Therefore, the power required for the subsequent opening operation of the opening / closing part 30 can be reduced.

[0063] (4) The mobile dock 1 is any one of the mobile docks 1 in (1) to (3), wherein the opening / closing part 30 includes a first opening / closing part 31 and a second opening / closing part 32 provided inside the dock space R more than the first opening / closing part 31.

[0064] Thus, even when the seawater breaks through the first opening / closing part 31, the second opening / closing part 32 can prevent the entire dock space R from being flooded immediately.

[0065] (5) The mobile dock 1 is any one of the mobile docks 1 in (1) to (4), and includes a crane provided movably on the upper end surface 20c of the side wall part 20.

[0066] Thus, the repair work of the ship S accommodated in the dock space R can be easily performed.

[0067] (6) The mobile dock 1 is any one of the mobile docks 1 in (1) to (5), and includes a top plate part 70 that covers the dock space R from above.

[0068] Thus, confidentiality during work can be ensured. Also, the dock space R can be isolated from rain and wind, and the working environment can be improved.

[0069] (7) The mobile dock 1 is any one of the mobile docks 1 in (1) to (6), and includes a partition wall that divides the dock space R.

[0070] Thus, a plurality of ships can be introduced into the dock space.

[0071] The mobile dock 1 of (8) is the mobile dock 1 of any one of (1) to (7) including a self-propelled device 80 enabling navigation.

[0072] Accordingly, the mobile dock 1 can be moved to a destination where the ship S needs to be repaired without towing the mobile dock 1.

Explanation of Signs

[0073] 1 Mobile dock 10 Floating unit 10a Upper surface 10b Lower surface 11 Floating body 20 Side wall part 20a Inner surface 20b Outer surface 20c Upper end surface 21 Ballast tank 22 Sill 30 Opening / closing part 31 First opening / closing part 32 Second opening / closing part 40 Living area 41 Generator room 42 Mobile crane 50 Drainage part 51 Drainage pump 52 Drain pipe 60 Water injection part 61 Water injection pump 62 Water injection pipe 70 Top plate part 71 Anchor winch 72 Partition plate 80 Self-propelled device 81 Propeller 82 Rudder R Dock space S Ship O1 First axis O2 Second axis

Claims

1. A floating unit extending horizontally, A side wall portion that rises from the floating unit and forms a dock space capable of accommodating a ship on the floating body, An opening / closing portion that is movable between an open position where the dock space is opened horizontally and a closed position where the dock space is blocked horizontally, A drainage portion capable of discharging water in the dock space to the outside of the dock space, A mobile dock comprising the above.

2. The mobile dock according to claim 1, further comprising a ballast tank provided inside at least one of the floating unit and the side wall portion and capable of adjusting buoyancy.

3. The mobile dock according to claim 1 or 2, further comprising a water injection portion capable of supplying water into the dock space.

4. The opening / closing portion is A first opening / closing portion, A second opening / closing portion provided inside the dock space more than the first opening / closing portion, The mobile dock according to claim 1 or 2, including the above.

5. The mobile dock according to claim 1 or 2, further comprising a crane provided movably on the upper end surface of the side wall portion.

6. The mobile dock according to claim 1 or 2, further comprising a top plate portion covering the dock space from above.

7. The mobile dock according to claim 1 or 2, further comprising a partition wall dividing the dock space.

8. The mobile dock according to claim 1 or 2, further comprising a self-propelled device enabling navigation.

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