Workboat

Abstract

We provide work vessels that can be easily switched between offshore wind power generation and other uses such as marine resource development. [Solution] The workboat is equipped with a cargo loading area located below the upper deck, the cargo loading area having a plurality of compartments separated by partitions, and the plurality of compartments include a multi-purpose compartment equipped with an opening leading to the upper deck and a pouring / discharging section for loading liquid cargo.

Description

Technical Field

[0001] The present invention relates to a workboat.

Background Art

[0002] When constructing a floating-type offshore wind power generation facility as shown in Patent Document 1, it is necessary to transport mooring ropes and the like used for mooring the floating body to the construction site. A workboat is used for such transportation.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Regarding the construction of facilities related to floating-type offshore wind power generation, there may be peak seasons and slack seasons. Therefore, if a dedicated workboat for floating-type offshore wind power generation facilities is prepared, there will be problems such as a decrease in the operation rate during the slack season and an inability to recover the hull maintenance cost. Thus, for example, it is conceivable to divert a workboat for ocean resource development such as oil and gas to the construction of facilities related to floating-type offshore wind power generation. However, conventional workboats are not easily switched for such uses and have problems in terms of cost and operation efficiency.

[0005] The present invention has been made in consideration of such circumstances, and an object thereof is to provide a workboat that can be easily switched between for offshore wind power generation and for other uses such as ocean resource development.

Means for Solving the Problems

[0006] To solve the above problems, a workboat according to one embodiment 1 of the present invention is provided with a cargo loading area located below the upper deck, the cargo loading area having a plurality of compartments separated by partitions, and the plurality of compartments include a multi-purpose compartment having an opening leading to the upper deck and a pouring / discharging section for loading liquid cargo. [Effects of the Invention]

[0007] According to the above aspects of the present invention, it is possible to provide a work vessel that can be easily switched between offshore wind power generation and other applications such as marine resource development. [Brief explanation of the drawing]

[0008] [Figure 1] This is a side view showing an example of the layout of a cargo ship according to this embodiment. [Figure 2] This is a plan view showing an example of the layout of a cargo ship according to this embodiment. [Figure 3] This is a perspective view illustrating the layout in Figure 2. [Figure 4] This is a cross-sectional view taken along the line IV-IV in Figure 2. [Figure 5] This is a magnified view showing a more detailed portion of Figure 2. [Modes for carrying out the invention]

[0009] The workboat of this embodiment will be described below with reference to the drawings. As shown in Figure 1, the workboat 1 comprises an upper deck area A1, a cargo loading area A2, a living area A3, and an engine area A4. The upper deck area A1 is the area above the upper deck 3. Part of the cargo may be loaded on the upper deck area A1, i.e., the upper deck 3. The cargo loading area A2 is the area below the upper deck 3. The cargo loading area A2 will be described later. The engine room and other facilities are located in the engine area A4. Note that the layout of each area A1 to A4 shown in Figure 1 is approximate and does not limit the scope of this disclosure.

[0010] Work vessel 1 can be switched between applications for offshore wind power generation and other uses (e.g., marine resource development). When constructing floating offshore wind power generation facilities, work vessel 1 is used for towing floating structures and transporting anchors, mooring ropes, anchor chains, etc., for mooring floating structures to the seabed. When conducting marine resource development, work vessel 1 transports liquid cargo, powdered cargo, solid cargo, etc. Examples of liquid cargo include fuel oil, methanol, mud, brine, and fresh water. Examples of powdered cargo include dry bulk. Dry bulk includes barite, bentonite, cement, etc.

[0011] Figure 2 is a plan view of the workboat 1. As shown in Figure 2, the workboat 1 is provided with several compartments 101 to 118. These compartments 101 to 118 are located, for example, below the cargo loading area A2, i.e., the upper deck 3. Each of the compartments 101 to 118 is separated from the others by a partition B. Partition B is, for example, a steel wall. The workboat 1 is equipped with two propeller power shafts 11 and 12. The propeller power shafts 11 and 12 extend in the longitudinal direction L of the hull 2 ​​and are arranged side by side in the lateral direction W. The propeller power shafts 11 and 12 are arranged, for example, so as to traverse the cargo loading area A2 in the longitudinal direction L in a plan view.

[0012] Propellers 11a and 12a are provided at the rear ends of the propeller power shafts 11 and 12. A drive unit 10 is located at the tip of the propeller power shafts 11 and 12. The drive unit 10 is located in engine area A4. The drive unit 10 rotates the propeller power shafts 11 and 12, transmitting power to the propellers 11a and 12a, thereby providing thrust for the workboat 1.

[0013] The following describes examples of how to assign uses to several compartments 101-118. However, the assignments described below are merely examples and may be changed. Compartments 101-106 are used as fuel-only compartments, for example, to store fuel oil. Compartments 107 and 108 are used as anchor chain-only compartments, for example, to store anchor chains. Compartments 109 and 110 are used as multi-purpose compartments, for example, to store fuel oil or anchor chains. Compartments 111-116 are used as multi-purpose compartments, for example, to store anchor chains or liquid cargo. Compartments 117 and 118 are used as multi-purpose compartments, for example, to store dry bulk tanks T or mooring lines.

[0014] <Combined-use plots 111-116> The multi-purpose compartments 111-116 are arranged in three rows along the longitudinal direction L and in two rows along the lateral direction W. Multi-purpose compartments 111-113 are arranged along the longitudinal direction L and partially overlap the propeller power shaft 11 in a plan view. Multi-purpose compartments 114-116 are arranged along the longitudinal direction L and partially overlap the propeller power shaft 12 in a plan view.

[0015] As shown in Figure 3, in sections 101 to 118, an inclined section S is provided at the bottom of the portion that overlaps with the propeller power shafts 11 and 12 in a plan view. By providing the inclined section S in this way, the bottom walls of sections 101 to 118 do not interfere with the propeller power shafts 11 and 12, and space for the propeller power shafts 11 and 12 can be secured.

[0016] Figure 4 is a cross-sectional view taken along the line IV-IV in Figure 1. Note that the positional relationship between the inclined section S and the propeller power shaft 12 is the same as in Figure 4 for cross-sections at positions different from the IV-IV line in the longitudinal direction L. Furthermore, although not shown, the positional relationship between the inclined section S and the propeller power shaft 11 in the cross-sections overlapping with the propeller power shaft 11 in a plan view is also the same as in Figure 4.

[0017] As shown in Fig. 4, the combined compartment 115 is provided with an opening H and a filling / discharging part P. The opening H is provided in the ceiling of the combined compartment 115. For example, by opening the closing device (such as a hatch) of the opening H, the upper part of the combined compartment 115 can be opened to the upper deck 3, and the anchor chain or the like can be stored in the combined compartment 115. Alternatively, by opening the closing device of the opening H, the anchor chain or the like stored in the combined compartment 115 can be taken out. That is, the opening H can be used when the workboat 1 is used for offshore wind power generation. The filling / discharging part P is used to store liquid cargo in the combined compartment 115 or take out liquid cargo from the combined compartment 115. That is, the filling / discharging part P can be used when the workboat 1 is used for ocean resource development. The filling / discharging part P is, for example, a pipe.

[0018] When storing the anchor chain in the combined compartment 115, for example, using a deck equipment (such as a crane) provided on the upper deck 3, the anchor chain is hung into the combined compartment 115 through the opening H equipped with a closing device and gradually dropped. Here, as shown in Fig. 4, the opening H equipped with a closing device and the inclined part S are arranged at positions overlapping in the lateral width direction W. Although not shown in the figure, in the longitudinal direction L, the opening H and the inclined part S are also arranged at overlapping positions. That is, the inclined part S is located directly below the opening H. Therefore, when the anchor chain is dropped from the opening H, at the bottom of the combined compartment 115, the anchor chain drops along the inclined part S in a sliding manner. Thereby, it is possible to suppress the entanglement of the anchor chain in the combined compartment 115.

[0019] By making the partition B of the compartments 101 to 118 into a corrugated shape, the strength of the hull 2 may be ensured. Thereby, when cleaning the combined compartments 111 to 116, it is possible to suppress the retention of liquid cargo or cleaning liquid on the uneven surface.

[0020] Also, as shown in FIG. 5, a flexure prevention member M may be provided on the partition B between the compartments 101 to 118. The flexure prevention member M is a member extending in the vertical direction Z, and is arranged, for example, so as to be sandwiched between the bottom wall and the top wall of the compartments 101 to 118. Thereby, the strength of the hull 2 can be ensured. When switching the workboat 1 from being for ocean resource development to being for offshore wind power generation, it may be necessary to clean the liquid cargo adhering to the wall surfaces of the shared compartments 111 to 116. At this time, if the flexure prevention member M is arranged inside the shared compartments 111 to 116, liquid cargo and cleaning liquid are likely to remain at corners formed by the flexure prevention member M and the partition B. Therefore, in the present embodiment, the flexure prevention member M is not arranged inside the shared compartments 111 to 116, but is arranged outside the shared compartments 111 to 116. Due to the presence of the inclined portion S on the bottom wall of the shared compartments 111 to 116, it is also possible to collect the liquid cargo and the cleaning liquid at one place along the inclined portion S.

[0021] Although not shown, the shared compartments 111 to 114 and 116 are also provided with a filling / discharging portion P, an opening H provided with a closing device (such as a hatch), and an inclined portion S, respectively. Therefore, any of the shared compartments 111 to 116 can be used for both the storage of the anchor chain for offshore wind power generation and the storage of the liquid cargo for ocean resource development. The other compartments may also be provided with an opening H provided with a similar closing device or a filling / discharging portion P.

[0022] <Second Shared Compartments 117, 118> As shown in FIG. 2, the second shared compartments 117 and 118 are located at the outer ends in the width direction W and face the side wall 4 of the hull 2. The two second shared compartments 117 and 118 are arranged so as to sandwich the shared compartments 111 to 116 in the width direction W. The second shared compartments 117 and 118 have a larger occupied area than the shared compartments 111 to 116 in plan view. More specifically, the dimensions of the second shared compartments 117 and 118 in the longitudinal direction L are larger than those of the shared compartments 111 to 116. However, the sizes of the second shared compartments 117 and 118 may be changed. The second shared compartments 117 and 118 may not have the inclined portion S, and a partition B may not be provided between the second shared compartments 117 and 118 and the propeller power shafts 11 and 12.

[0023] When the work vessel 1 is used for offshore resource development, the second multi-purpose compartments 117 and 118 can accommodate, for example, tanks T for dry bulk. When the work vessel 1 is used for offshore wind power generation, the second multi-purpose compartments 117 and 118 can accommodate, for example, reels for winding mooring lines. In either of the above uses, the second multi-purpose compartments 117 and 118 may also contain fuel oil or the like. Since the second multi-purpose compartments 117 and 118 face the side wall 4, it is possible to, for example, make a hole in the side wall 4 and insert or remove the tanks T or reels into the second multi-purpose compartments 117 and 118 through that hole.

[0024] As described above, the work vessel 1 of this embodiment is equipped with a cargo loading area A2 located below the upper deck 3. The cargo loading area A2 has a plurality of compartments 101 to 118 separated by partitions B, and the plurality of compartments 101 to 118 include multi-purpose compartments 111 to 116 equipped with openings H with closing devices leading to the upper deck 3 and pouring / discharging sections P for loading liquids. With such a work vessel 1, when used for offshore wind power generation, anchor chains and the like can be stored in the multi-purpose compartments 111 to 116 through the openings H with closing devices. Also, when the work vessel 1 is used for marine resource development, liquid cargo can be stored in the multi-purpose compartments 111 to 116 through the pouring / discharging sections P. Therefore, it is easy to switch the use of the work vessel 1.

[0025] Furthermore, the workboat 1 is equipped with propeller power shafts 11 and 12, and a drive device 10 that drives the propeller power shafts 11 and 12. The propeller power shafts 11 and 12 are positioned to overlap with the multi-purpose compartments 111 to 116 in a plan view, and an inclined section S is provided in the bottom wall of the multi-purpose compartments 111 to 116 in the portion that overlaps with the propeller power shafts 11 and 12. With this configuration, when the multi-purpose compartments 111 to 116 are used to house anchor chains, the anchor chains can be housed by sliding along the inclined section S. This suppresses entanglement of anchor chains within the multi-purpose compartments 111 to 116. In addition, when the multi-purpose compartments 111 to 116 are cleaned after being used to house liquid cargo, cleaning fluid can be collected in one place along the inclined section S and easily discharged from the multi-purpose compartments 111 to 116.

[0026] Furthermore, the multiple compartments 101-118 include multiple multi-purpose compartments 114-116. The multi-purpose compartments 114-116 are arranged in the axial direction (longitudinal direction L) of the propeller power shaft 12, and an inclined section S is provided in the part of the bottom wall of each of the multi-purpose compartments 114-116 that overlaps with the propeller power shaft 12 in a plan view. With this configuration, the propeller power shaft 12 can be placed in the space created by the inclined section S. In other words, the inclined section S, which is provided to secure space for the propeller power shaft 12, can be used to accommodate the mooring chains in the multi-purpose compartments 114-116 or to clean the multi-purpose compartments 114-116. The same effect as described above can be obtained with regard to the arrangement of the multi-purpose compartments 111-113 and the propeller power shaft 11.

[0027] Furthermore, among the multiple compartments 101 to 118, there are two second multi-purpose compartments 117 and 118 capable of accommodating tanks T, and these two second multi-purpose compartments 117 and 118 are located at the outer end of the hull 2 ​​in the lateral direction W. With this configuration, for example, an opening can be temporarily made in the side wall 4 of the hull 2, and the tanks T can be moved in and out of the second multi-purpose compartments 117 and 118 through that opening. Therefore, it is possible to easily switch between a state in which tanks T are located in the second multi-purpose compartments 117 and 118 and a state in which tanks T are not located. When tanks T are located in the second multi-purpose compartments 117 and 118, dry bulks, etc., can be accommodated in the tanks T. When tanks T are not located in the second multi-purpose compartments 117 and 118, reels for winding mooring lines used in the construction of offshore wind power generation can be located in the second multi-purpose compartments 117 and 118.

[0028] Furthermore, the two second multi-purpose compartments 117 and 118 are positioned with multi-purpose compartments 111 to 116 in between. This arrangement allows multi-purpose compartments 111 to 116 to be positioned in a location that overlaps with the propeller power shafts 11 and 12 in a plan view, and the two second multi-purpose compartments 117 and 118 to be positioned at the outer end in the width direction W. Therefore, the space within the hull 2 ​​can be used efficiently.

[0029] Furthermore, a stiffening material M extending in the vertical direction may be placed in partition B. In the example shown in Figure 5, the stiffening material M does not protrude into the interior of the multi-purpose compartments 111-116. Therefore, when cleaning the multi-purpose compartments 111-116 after storing liquid cargo in them, it is possible to suppress the accumulation of liquid cargo and cleaning fluid in the irregularities created by the stiffening material M. Thus, cleaning of the multi-purpose compartments 111-116 becomes easier. In addition, the stiffening material M helps to ensure the strength of the hull 2.

[0030] The technical scope of the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.

[0031] For example, the workboat 1 of the above embodiment had six multi-purpose compartments 111 to 116. However, the number of multi-purpose compartments can be changed, and there may be only one. Similarly, the number of second multi-purpose compartments 117 and 118, the number of anchor chain compartments 109 and 110, the number of fuel compartments 101 to 106, etc., can also be changed. Similarly, the number of propeller power shafts can be changed. Note that, to distinguish them from the second multi-purpose compartments 117 and 118, multi-purpose compartments 111 to 116 may be referred to as first multi-purpose compartments 111 to 116.

[0032] Furthermore, without departing from the spirit of the present invention, the components in the above-described embodiments may be replaced with well-known components as appropriate, and the above-described embodiments and modifications may be combined as appropriate. [Explanation of Symbols]

[0033] 1…Workboat 2…Hull 3…Upper deck 10…Drive system 11, 12…Propeller power shaft 101~118…Compartments 111~116…Multipurpose compartments 117, 118…Second multipurpose compartments A2…Cargo loading area B…Partition H…Opening M…Stiffener P…Inlet / outlet S…Inclined section T…Tank W…Width Z…Vertical direction

Claims

1. It is equipped with a cargo loading area located below the upper deck, The cargo loading area has multiple sections separated by partitions, A workboat in which the plurality of compartments include a multi-purpose compartment having an opening to the upper deck and a pouring / discharging section for loading liquid cargo.

2. The propeller power shaft, The system includes a drive device for driving the propeller power shaft, The propeller power shaft is positioned in a location that overlaps with the shared compartment in a plan view. The workboat according to claim 1, wherein a sloping portion is provided in the bottom of the multi-purpose compartment in a portion that overlaps with the propeller power shaft in a plan view.

3. The aforementioned multiple sections include multiple sections that can be used for multiple purposes. Multiple of the aforementioned multi-purpose compartments are arranged in a line along the axial direction of the propeller power shaft, The workboat according to claim 2, wherein an inclined portion is provided in the bottom wall of each of the multiple multi-purpose compartments in a portion that overlaps with the propeller power shaft in a plan view.

4. The aforementioned plurality of compartments include two second dual-purpose compartments capable of accommodating tanks, The workboat according to any one of claims 1 to 3, wherein the two second multi-purpose compartments are located at the outer end in the width direction of the hull.

5. The workboat according to claim 4, wherein the two second multi-purpose compartments are arranged so as to sandwich the multi-purpose compartment between them.

6. A stiffening material extending in the vertical direction is placed in at least a portion of the partition. The workboat according to claim 1, wherein the stiffening material does not protrude into the inside of the multi-purpose compartment.

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