Nori cultivation box boat

Abstract

To provide a nori cultivation box boat equipped with a reaction liquid treatment mechanism having a vertical two-tier structure of a treatment tank and a storage tank, the nori cultivation box boat achieving enhanced strength of the bottom wall of the treatment tank and ensuring stability even when a treatment liquid or other liquid is stored within the storage tank.SOLUTION: A nori cultivation box boat comprising a box boat body 2 and a reaction liquid treatment mechanism 3 provided on an upper surface of the box boat body for performing reaction liquid treatment of cultivated nori, wherein the reaction liquid treatment mechanism 3 has a vertical two-tier structure of a treatment tank 4 for performing reaction liquid treatment of the cultivated nori by immersing the nori in a reaction liquid, and a storage tank 5 for storing a treatment residue liquid after the reaction liquid treatment, and wherein reinforcing means 6 is provided within an internal space of the storage tank 5 to support a lower surface of a bottom wall of the treatment tank 4 from below.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a seaweed box used in seaweed cultivation for activities such as activation and fertilization of cultivated seaweed. [Background technology]

[0002] In Nori cultivation, activation treatment is performed to eliminate other seaweeds and pathogens that have attached to the cultivated Nori, and fertilization treatment is performed to promote the growth of the cultivated Nori. These operations are carried out by boat, and the boats used for this operation are often small, inexpensive arks, known as arks (nori arks). The arks are equipped with treatment layers on board in which activation treatment solutions and fertilization solutions are stored. In activation and fertilization treatments, the Nori nets stretched out in the Nori farm are pulled onto the boat from the front side of the ark and immersed in the treatment layer on the ark, thereby performing the activation and fertilization treatments on the cultivated Nori. In this case, the ark passes under the Nori nets as it moves forward, allowing the cultivated Nori to be continuously treated.

[0003] Because seaweed hulls are less mobile than regular ships, they are anchored near the seaweed farms, i.e., at sea, during the period (approximately three months) during which the cultivated seaweed is activated and fertilized. Typically, the residual liquid after activation and fertilization processes in the hull is supplied or collected by a separate parent ship to prevent the residual liquid from being dumped in the ocean. However, this requires the parent ship to be used for recovery each time, which is inefficient and costly. Therefore, in Patent Documents 1 and 2, the applicant proposed a seaweed hull equipped with a reaction liquid treatment mechanism with a two-layer structure consisting of a treatment tank and a storage tank, allowing the residual liquid to be stored in the storage tank. This allows for more efficient reuse and recovery of the residual liquid without using the parent ship each time (see, for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 7280648 [Patent Document 2] Patent No. 7343950 Summary of the Invention [Problem to be solved by the invention]

[0005] While the laver arks proposed in Patent Documents 1 and 2 have the advantage of enabling efficient reuse and recovery of the residual liquid as described above, their two-tiered structure consisting of a treatment tank and a storage tank has the following problems: For example, when performing maintenance or cleaning on the ark or the reaction liquid treatment mechanism, workers or heavy objects may be placed on the treatment tank. However, because the storage tank is hollow below the treatment tank, there is a risk that the bottom wall of the treatment tank may be deformed or damaged by the heavy objects. Furthermore, when the residual liquid or the like is stored in the storage tank, for example, sudden beam waves may cause the residual liquid or the like to shift suddenly within the storage tank, which could shift the center of gravity of the ark, affecting the stability and safety of the ark.

[0006] The present invention has been made in consideration of the above-mentioned problems of the prior art, and one of its objectives is to provide a laver hull that can improve the strength of the bottom wall of the treatment hull even when the treatment hull has a two-layer structure of a treatment hull and a storage hull, and further to provide a laver hull that can maintain its stability even when a liquid such as a treatment solution is stored in the storage hull. [Means for solving the problem]

[0007] In order to solve the above problems, the seaweed ark of the present invention is a seaweed ark comprising a ark body and a reaction liquid processing mechanism provided on the upper surface of the ark body for processing the reaction liquid of cultivated seaweed, the reaction liquid processing mechanism having a two-tank structure consisting of a processing tank for immersing the cultivated seaweed in the reaction liquid to perform reaction liquid processing, and a storage tank for storing the remaining processing liquid after reaction liquid processing, and having a reinforcing means provided in the internal space of the storage tank for supporting the underside of the bottom wall of the processing tank from below.

[0008] The reinforcing means may also include a cross member that is installed across the internal space of the storage tank and supports the underside of the bottom wall of the treatment tank.

[0009] The horizontal member may be provided with a gap at its lower side that allows liquid to flow through.

[0010] The cross member may also include a beam-like member that is erected so as to form the gap between itself and the bottom wall of the storage tank and to divide the upper side of the internal space of the storage tank into a plurality of compartments.

[0011] The horizontal member may be provided with a ventilation portion that allows air to flow through.

[0012] The reinforcing means may also include a plurality of vertical members arranged at predetermined intervals in the internal space of the storage tank and erected from the bottom wall of the storage tank so that their upper ends abut the underside of the bottom wall of the treatment tank.

[0013] Furthermore, the reaction liquid processing mechanism may have a tank body with an open top side, and a unit that is removably installed at a middle position between the top and bottom of the tank body to divide the interior of the tank body into upper and lower sections and form the bottom wall of the processing tank, and by installing the bottom wall unit in the tank body, a two-layer structure of the processing tank and the storage tank is formed within the tank body, and the reinforcing means may be provided on the lower side of the tank body and be configured to removably support the bottom wall unit from below. [Effects of the Invention]

[0014] The Nori ark of the present invention comprises a ark body and a reaction solution treatment mechanism mounted on the upper surface of the ark body for treating Nori with a reaction solution. The reaction solution treatment mechanism has a two-chamber structure consisting of a treatment tank for immersing the cultivated Nori in a reaction solution and a storage tank for storing the residual solution after the reaction solution treatment. The reaction solution treatment mechanism is configured with a reinforcement means for supporting the underside of the bottom wall of the treatment tank from below. This improves the bottom strength of the treatment tank without increasing its weight, even with a two-layer structure. As a result, deformation or damage to the bottom wall of the treatment tank can be reliably prevented even when workers or heavy objects are placed on the treatment tank for maintenance, etc. Furthermore, because the reinforcement means is located within the storage tank, it can also function to prevent sudden shifts or imbalances in the residual solution stored in the storage tank, even when the ark is hit by a sudden beam wave while the residual solution is stored in the storage tank, thereby maintaining the stability and safety of the ark. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a perspective view showing the configuration of a seaweed box according to a first embodiment of the present invention (in a state where a bottom wall unit of a processing tank is removed from a storage tank). FIG. [Figure 2] 2 is a perspective cross-sectional view of the bottom wall unit of the seaweed box of FIG. 1 installed in the tank body along line AA. FIG. [Figure 3] 2 is a perspective cross-sectional view of the bottom wall unit of the seaweed box of FIG. 1 installed in the tank body along line BB. FIG. [Figure 4] FIG. 10 is a perspective view showing the configuration of a laver hut according to a second embodiment of the present invention (in a state where an activated solution treatment tank is removed from a storage tank). [Figure 5] 5 is a perspective cross-sectional view taken along line CC of the bottom wall unit of the seaweed box of FIG. 4 installed in the tank body. FIG. [Figure 6] FIG. 5 is a perspective cross-sectional view taken along line DD of the bottom wall unit of the seaweed box of FIG. 4 installed in the tank body. DETAILED DESCRIPTION OF THE INVENTION

[0016] The present invention will be described in more detail below using preferred embodiments, but the following embodiments are merely examples of realizing the present invention and the present invention is not limited thereto.

[0017] Figures 1 to 3 show a first embodiment of the Nori ark of the present invention. As shown in Figures 1, 2, and 3, the Nori ark 1 of this embodiment comprises an ark body 2 and a reaction liquid processing mechanism 3. The reaction liquid processing mechanism 3 has a two-tank structure consisting of a processing tank 4 and a storage tank 5, and also has a reinforcing means 6 for the processing tank 4.

[0018] The ark body 2 is formed, for example, in a substantially rectangular shape, and can be any ark of a similar structure known in the art. In this embodiment, the direction of travel of the nori ark 1, i.e., the bow side, is defined as the forward direction. Therefore, the lateral direction along the direction of travel of the nori ark 1 is defined as the fore-aft direction, and the lateral direction along the width of the nori ark 1, which is perpendicular to the direction of travel (fore-aft direction), is defined as the left-right direction.

[0019] In this embodiment, a front guide member 21 is provided at the front of the ark ship main body 2 to scoop up the seaweed net in the sea as the ark ship main body 2 moves forward and guide the seaweed net into the treatment tank 4. The front guide member 21 is formed, for example, in a generally trapezoidal shape in a plan view, narrowing at the tip and gradually widening toward the ark ship main body 2, and is inclined downward at a certain angle from the front end of the ark ship main body 2 toward the front, so that the tip of the front guide member 21 is submerged in the sea. A rear guide member 22 is provided at the rear side of the ark ship main body 2 to guide the seaweed net into the sea after it has passed through the treatment tank 4. The ark ship main body 2 may also be provided with an outboard motor or the like for moving the ship forward.

[0020] The reaction liquid treatment mechanism 3 is a reaction liquid treatment means provided on the upper surface of the box body 2, for immersing the seaweed nets stretched over the seaweed farm in a reaction liquid (activation treatment liquid or fertilization treatment liquid) to treat the cultivated seaweed with the reaction liquid. The reaction liquid treatment mechanism 3 has a two-tank structure consisting of a treatment tank 4 for immersing the cultivated seaweed in the reaction liquid to treat the seaweed with the reaction liquid, and a storage tank 5 for storing the residual liquid after the reaction liquid treatment.

[0021] The reaction liquid treatment mechanism 3 has a storage tank 5 for storing the residual liquid after the reaction liquid treatment, which makes it possible to prevent the residual liquid from being dumped into the ocean. In addition, the residual liquid stored in the storage tank 5 is transferred to the treatment tank 4, and new undiluted treatment liquid is added to this residual liquid after the reaction liquid treatment, and the desired new treatment liquid is prepared by diluting it appropriately with seawater, thereby making it possible to effectively use the residual liquid after the reaction liquid treatment. Therefore, it is possible to provide a seaweed ark structure that makes it possible to effectively use or recover the residual liquid after the activation treatment (preventing it from being dumped into the ocean).

[0022] In this embodiment, the reaction liquid processing mechanism 3 includes a single tank body 7 having an open top and a bottom wall unit 8 detachably installed at a vertically intermediate position within the tank body 7 to divide the interior of the tank body 7 into upper and lower sections. Therefore, by installing the bottom wall unit 8 within the tank body 7, the reaction liquid processing mechanism 3 forms a processing tank 4 in the upper part of the tank body 7 and a storage tank 5 in the lower part of the tank body 7, thereby achieving a two-layer structure. Specifically, the upper space within the tank body 7, divided vertically by the bottom wall unit 8, becomes the processing tank 4, the bottom wall unit 8 forms the bottom wall of the processing tank 4, and the upper side of the side wall of the tank body 7 forms the side wall of the processing tank 4. The space within the tank body 7 below the bottom wall unit 8 becomes the storage tank 5 for storing the processing liquid, and the bottom wall of the tank body 7 forms the bottom wall of the storage tank 5. The bottom wall unit 8 can also function as a lid covering the upper end of the storage tank 5. The bottom wall unit 8 is removably supported by the reinforcing means 6 at a position spaced a predetermined height from the bottom wall of the tank body 7 so that it is in the middle position between the top and bottom within the tank body 7. With this configuration, a two-tier structure consisting of the treatment tank 4 and the storage tank 5 can be realized on the ship with a relatively simple structure. Furthermore, because the bottom wall unit 8 is detachable from the tank body 7, it is also possible to remove the bottom wall unit 8 to perform maintenance on each component or to clean the inside of the tank body 7.

[0023] The tank body 7 is formed integrally with the ark body 2 at approximately the center of the upper surface of the ark body 2. The external shape of the tank body 7 is a roughly rectangular parallelepiped shape with an open top. The front end of the tank body 7 is common to the front wall of the ark body 2, and a hollow tank body internal space with an open top is formed by the side walls on both the left and right sides and the rear side, and the bottom wall. A drainage groove portion 71 is provided in the bottom wall of the tank body 7. Work passages 23 are formed on both the left and right outside of the tank body 7 of the ark body 2, allowing workers to work.

[0024] As shown in Figures 1, 2, and 3, in this embodiment, four side wall members 51 that form the side walls of the storage tank 5 are installed inside the lower half of the tank body 7. These side wall members 51 of the storage tank 5 support the bottom wall unit 8 at their upper ends and, in cooperation with the reinforcing means 6, also serve as support means for the bottom wall unit 8. Of the four side wall members 51, the side wall members 51 located on both the left and right sides and at the rear are installed in close contact with the inner surface of the side walls of the tank body 7. The front side wall member 51 is located rearward and spaced apart from the inner surface of the front end wall of the ark body 2. The side wall members 51 are provided, for example, with a vertical length that is approximately half the vertical length of the tank body 7. Note that a configuration in which the side wall members 51 are not installed and the lower parts of the side walls of the tank body 7 serve as the side walls of the storage tank 5 may also be used.

[0025] The bottom wall unit 8 is, for example, a rectangular plate-like member with a cross-sectional shape in plan view that is approximately the same size as the internal cross-section of the tank body 7. It is inserted into the tank body 7 and supported at a predetermined height by the reinforcing means 6. The bottom wall unit 8 has a bottom wall portion 81 that forms the bottom wall of the treatment tank 4. The bottom wall portion 81 and the side wall of the tank body 7 cooperate to form the treatment tank 4, which has an open top. Furthermore, a sloped wall portion 82 is integrally formed at the front portion of the bottom wall unit 8, sloping upward from the front end of the bottom wall portion 81 toward the front. This sloped wall portion 82 forms the side wall of the front end of the treatment tank 4. Furthermore, the bottom wall portion 81 of the treatment tank 4 is provided with scuppers 84 at the four corners for draining the treated liquid from the treatment tank. With the scuppers 84 closed, the treated liquid can be stored in the treatment tank 4. After treatment, the scuppers 84 can be opened to allow the residual liquid to drop from the treatment tank 4 into the storage tank 5, where it can be stored.

[0026] Furthermore, a second bottom wall portion 83 is provided at the front end of the bottom wall unit 8, positioned slightly above the bottom wall portion 81. The second bottom wall portion 83 is formed by combining rectangular elongated plate members extending in the left-right direction of the box body 2 in a roughly V-shape. The apex of the V-shape of the second bottom wall portion 83 is fixed and supported by the upper end of the inclined wall portion 82. When the bottom wall unit 8 is installed at a vertically intermediate position within the tank body 7, the second bottom wall portion 83 cooperates with the side walls of the tank body 7 to form a draining tank portion 9. The draining tank portion 9 is positioned forward of the treatment tank 4 on the box body 2, so that when the seaweed net is pulled onto the vessel, excess seawater adhering to the seaweed and the net can be removed before the net is guided into the treatment tank 4. Draining drain holes 72 are drilled horizontally through the left and right side walls of the front end of the tank body 7, corresponding to the position of the draining tank portion 9.

[0027] A hanging wall portion 85 hanging down is provided at the front side of the bottom wall unit 8, at the connection position between the bottom wall portion 81 and the inclined wall portion 82. When the bottom wall unit 8 is installed at a vertically intermediate position within the tank body 7, the lower end of the hanging wall portion 85 abuts against the bottom wall of the tank body 7 and also abuts against the side wall member 51 on the front side of the storage tank 5, so that the bottom wall unit 8 is attached to the storage tank 5 in a fitted manner.

[0028] The structure of the reaction liquid processing mechanism 3, i.e., the processing tank 4 and the storage tank 5, is not limited to that described above. For example, the processing tank 4 may be formed as a roughly rectangular parallelepiped container with an open top, and the processing tank 4 may be detachably combined to close the top opening of the storage tank 5, forming an upper and lower two-layer structure. For example, the roughly rectangular parallelepiped processing tank 4 may also serve as the bottom wall unit described above. That is, the bottom wall unit 8 described above may be provided with a side wall rising from the bottom wall portion. Alternatively, the processing tank 4 and the storage tank 5 may be fixedly provided.

[0029] The reinforcing means 6 is a reinforcing and supporting means that supports the underside of the bottom wall of the treatment tank 4 from below, while maintaining the strength of the bottom wall. The reinforcing means 6 can reinforce the bottom wall, for example, by supporting a central portion spaced from the edge of the bottom wall that is formed in a planar shape of the treatment tank 4 or any portion of the bottom wall from below in a point-like, linear, or planar manner. This reliably prevents deformation or damage to the bottom wall of the treatment tank 4, even when workers or heavy objects are placed on the bottom wall of the treatment tank 4 during various operations or maintenance, and makes it possible to provide a practical seaweed box equipped with a reaction liquid treatment mechanism having a two-layer upper and lower structure.

[0030] 1, 2, and 3, in this embodiment, the reinforcing means 6 is configured to receive and support the bottom wall portion 81 of the bottom wall unit 8 that forms the bottom wall of the treatment tank 4 from below. Specifically, the reinforcing means 6 has a plurality of cross members installed so as to cross the internal space of the storage tank 5. The cross members are, for example, beam-like members 61 installed so as to cross horizontally within the tank body 7 in the internal space of the storage tank 5 along the front-rear direction X and the left-right direction Y.

[0031] The beam-like member 61 is horizontally suspended in midair at a predetermined distance from the bottom wall of the storage tank 5 so as to form a gap 62 between it and the bottom wall of the tank body 7, which serves as the bottom wall of the storage tank 5. The beam-like member 61 is, for example, a long plate-like member that is elongated in one direction and has a predetermined thickness. The plate surface is arranged upright, and both ends are fixed to the side wall members 51 of the storage tank 5. Vertical support members 61a that extend upright from the bottom wall are integrally formed at both ends of the beam-like member 61, and support the beam-like member 61 at a predetermined height in midair via the vertical support members 61a. The beam-like members 61 are, for example, arranged in a vertical and horizontal lattice pattern in a plan view so as to divide the storage tank 5 into nine sections. Furthermore, for example, the upper ends of the beam-like members 61 are set flush with the side wall members 51 of the storage tank 5. That is, the upper ends of the elongated beam-like members 61 linearly support the lower surface portions of the bottom wall portions 81 of the bottom wall units 8 from below, thereby detachably supporting them.

[0032] The beam-like members 61 are set, for example, so that their vertical length is at least half the height of the sidewall members 51 of the storage tank 5. In this embodiment, the beam-like members 61 are set to about two-thirds to one-quarter the height of the storage tank 5. By being arranged in this manner, when the residual liquid is stored in the storage tank 5, the residual liquid can flow freely through the gaps 62 on the lower side, and the upper layer of the residual liquid is dispersed into multiple parts by the beam-like members 61. As a result, even if the ark body 2 is affected by sudden transverse waves, the beam-like members 61 partially restrict the movement of the residual liquid within the storage tank 5, preventing sudden imbalances within the tank and maintaining the stability of the ark.

[0033] 1, a ventilation part 63 that allows air to circulate is provided on the upper side of the beam-shaped member 61. The ventilation part 63 keeps the liquid level of the residual liquid in the storage tank 5 even when the upper end opening of the storage tank 5 is closed and the upper layer side of the residual liquid is dispersed by the beam-shaped member 61, and thus stability can be maintained.

[0034] The reinforcing means 6 is not limited to the above configuration. For example, the beam-like member 61 may be provided detachably to the storage tank 5 or the tank body 7 without being fixed. The beam-like member may also be fixed to the bottom wall unit. In this case, the bottom wall unit becomes heavier, but cleaning of the tank body is easier. Furthermore, instead of the beam-like member configuration described above, the cross member may be configured as a partition plate erected from the bottom wall so as to divide the interior of the storage tank 5 into multiple compartments. In this case, it is preferable to open a portion of the lower side of the partition plate to form a gap through which the liquid flows, and to form an air vent on the upper side of the partition plate.

[0035] Next, a second embodiment of a laver ark of the present invention will be described with reference to Figures 4 to 6. The same components as those in the above embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. As in the above embodiment, the laver ark 1-2 of this embodiment comprises an ark body 2 and a reaction liquid processing mechanism 3. The reaction liquid processing mechanism 3 has a two-tank structure consisting of a processing tank 4 and a storage tank 5, and also has a reinforcing means 6 for the processing tank 4. As shown in Figures 4, 5, and 6, in this embodiment, the configuration of the storage tank 5 differs from that of the above embodiment, and the side wall of the storage tank 5 is configured to double as the lower side of the side wall of the tank body 7.

[0036] Furthermore, in this embodiment, the configuration of the reinforcing means 6 is also different from that of the above-described embodiment. The reinforcing means 6 has multiple vertical members arranged at predetermined intervals in the internal space of the storage tank 5, i.e., the lower space of the tank body 7. The vertical members are, for example, cylindrical supports 65, and their lower ends are fixed to the bottom wall of the storage tank 5 (the bottom wall of the tank body 7) and erected from the bottom wall. The supports 65 serve as support means for the bottom wall unit 8, i.e., the support means for the bottom wall of the treatment tank 4. The upper ends of the supports 65 abut against the underside of the bottom wall portion 81 of the bottom wall unit 8, thereby detachably supporting the bottom wall unit 8 from below. The supports 65 are set to a height, for example, approximately half the vertical length of the tank body 7. When the bottom wall unit 8 is installed in the tank body 7, the bottom wall portion of the bottom wall unit 8 is positioned approximately halfway up the tank body 7. The shape, number, arrangement, height, etc. of the support columns 65 constituting the reinforcing means 6 may be set arbitrarily.

[0037] With this configuration of the support columns 65, the strength of the bottom wall of the treatment tank 4 can be improved by the multiple support columns 65 supporting the bottom wall portion 81 of the bottom wall unit 8, i.e., the underside of the bottom wall of the treatment tank 4, at multiple points. Furthermore, since the multiple support columns 65 are erected within the storage tank 5, even if the ark body 2 is affected by sudden cross waves while the treatment residual liquid is stored in the storage tank 5, the multiple support columns 65 will impede the movement of the treatment residual liquid within the storage tank 5, and can function as a wave-dissipating structure within the storage tank 5. As a result, it is possible to prevent the center of gravity from being lost due to a bias in the treatment residual liquid within the storage tank 5, and the stability of the ark can be maintained. [Explanation of symbols]

[0038] 1. Seaweed Ark 2. The Ark 3. Reaction liquid processing mechanism 4 Treatment tank 5 Storage tank 6. Reinforcement measures 61 Beam-like member 7 Tank body 8 Bottom wall unit

Claims

1. A seaweed ark comprising a ark body and a reaction liquid treatment mechanism for treating the reaction liquid of cultivated seaweed provided on the upper surface of the ark body, The reaction liquid treatment mechanism has a two-tank structure consisting of a treatment tank for immersing the cultivated seaweed in the reaction liquid to perform the reaction liquid treatment, and a storage tank for storing the residual liquid after the reaction liquid treatment. The nori box is also characterized by having a reinforcing means provided in the internal space of the storage tank to support the underside of the bottom wall of the treatment tank from below.

2. 2. The laver box according to claim 1, wherein the reinforcing means comprises a cross member that is installed across the internal space of the storage tank and supports the underside of the bottom wall of the treatment tank.

3. 3. The laver ark according to claim 2, wherein the cross member has a gap formed in the lower portion thereof to allow liquid to pass through.

4. 4. The seaweed ark according to claim 3, wherein the cross member includes a beam-like member installed to form the gap between itself and the bottom wall of the storage tank and to divide the upper side of the internal space of the storage tank into a plurality of compartments.

5. 4. The nori ark according to claim 3, wherein the cross member is provided with a ventilation part for allowing air to pass through.

6. 2. The seaweed bin according to claim 1, wherein the reinforcing means includes a plurality of vertical members arranged at predetermined intervals in the internal space of the storage tank and erected from the bottom wall of the storage tank so that their upper ends abut the underside of the bottom wall of the treatment tank.

7. The reaction liquid processing mechanism includes a tank body having an open top surface, a unit that is detachably installed at a middle position between the top and bottom of the tank body, that divides the inside of the tank body into upper and lower sections, and that forms a bottom wall of the treatment tank; A bottom wall unit is installed in the tank body to form a two-layer structure of the treatment tank and the storage tank in the tank body, 7. The seaweed box according to claim 1, wherein the reinforcing means is provided on the lower side of the tank body so as to detachably support the bottom wall unit from below.

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