Laver net treatment ship

Abstract

To provide a laver net treatment ship that uniformizes the concentration of treatment liquid inside a treatment tank, and can excellently perform acid treatment or fertilization treatment of a laver net.SOLUTION: A laver net treatment ship (1) for treating a laver net (38) by treatment liquid stored in a treatment tank (3) on the sea is provided with an air supply device (17) for supplying air into the treatment tank (3). Further, in the air supply device (17), a plurality of air supply ports (31) are arranged in an array in a direction orthogonal to a moving direction of the laver net (38) which is treated in the treatment tank (3). Further, the air supply device (17) ejects air from the air supply ports (31) toward a moving direction of the laver net (38).SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a laver net processing ship for processing a laver net with a processing liquid stored in a processing tank at sea.

Background Art

[0002] Conventionally, for laver cultivation, laver nets stretched on the sea surface have been used. When acid-treating or fertilizing such laver nets at sea with a chemical solution, a laver net processing ship is used (see, for example, Patent Document 1).

[0003] In a conventional laver net processing ship, a processing tank with an open upper part is provided on the hull, and a processing liquid such as a chemical solution or fertilizer is injected into the processing tank at a predetermined concentration. While navigating, the laver net stretched on the sea surface is immersed in the processing liquid in the processing tank to perform acid treatment, fertilization treatment, etc.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the above conventional laver net processing ship, in order to appropriately perform acid treatment or fertilization treatment of the laver net, it is desirable to maintain the concentration of the processing liquid stored in the processing tank within a predetermined range.

[0006] However, in a laver net processing ship, since the operation is carried out at sea, due to evaporation of the processing liquid or inflow of seawater, etc., the concentration of the processing liquid stored in the processing tank becomes non-uniform during the operation, and it may be difficult to perform acid treatment or fertilization treatment of the laver net well.

Means for Solving the Problems

[0007] Therefore, in the present invention according to claim 1, in a laver net processing ship for processing laver nets with a processing liquid stored in a processing tank at sea, an air supply device for supplying air into the processing tank is provided.

[0008] Further, in the present invention according to claim 2, in the present invention according to claim 1, the air supply device is arranged with a plurality of air supply ports arranged side by side in a direction orthogonal to the moving direction of the laver net to be processed in the processing tank.

[0009] Further, in the present invention according to claim 3, in the present invention according to claim 2, the air supply device is configured to discharge air from the air supply port in the moving direction of the laver net.

Advantages of the Invention

[0010] And the present invention has the following described effects.

[0011] That is, in the present invention, in a laver net processing ship for processing laver nets with a processing liquid stored in a processing tank at sea, since an air supply device for supplying air into the processing tank is provided, by supplying air into the processing tank with the air supply device, the processing liquid inside the processing tank is agitated, the concentration of the processing liquid inside the processing tank can be made uniform, and the acid treatment and fertilization treatment of the laver net can be performed well.

[0012] In particular, when the plurality of air supply ports of the air supply device are arranged side by side in a direction orthogonal to the moving direction of the laver net to be processed in the processing tank, air can be supplied to the entire width of the laver net, the concentration of the processing liquid in which the laver net is immersed can be made uniform, and the acid treatment and fertilization treatment of the laver net can be performed even better.

[0013] Also, when the air supply device is configured to discharge air from the air supply port in the moving direction of the laver net, the force of the air discharged from the air supply port can be effectively utilized to smoothly move the laver net, and thereby, the acid treatment and fertilization treatment of the laver net can be performed even better.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0015] Hereinafter, the specific configuration of the laver net processing ship according to the present invention will be described with reference to the drawings.

[0016] As shown in FIGS. 1 to 3, in the laver net processing ship 1, a processing tank 3 for processing a laver net with a processing liquid is detachably attached inside a rectangular box-shaped hull 2 having an open upper portion.

[0017] The hull 2 forms working spaces 4 and 5 for workers to work on the left and right side portions of the processing tank 3.

[0018] Further, the hull 2 forms a bracket 6 at the rear, and an outboard motor 7 is attached to the bracket 6 via a hinge 8 so as to be vertically rotatable. Thereby, the outboard motor 7 can be changed in posture to a working posture (see FIG. 4(a)) suitable for driving at sea while standing upright with respect to the hull 2 and a non-working posture (see FIG. 4(b)) suitable for being placed on land while lying down with respect to the hull 2.

[0019] The treatment tank 3 has a bottomed rectangular box shape with an open top, and treatment liquids such as chemical solutions and fertilizers for treating the laver nets are stored inside. The laver nets can be immersed in the treatment liquid to perform acid treatment and fertilization treatment on the laver nets. A hollow air chamber 39 is formed below the bottom wall of this treatment tank 3. The air chamber 39 is provided with a circulation mechanism for circulating the treatment liquid between the treatment tank 3 to supply the treatment liquid stored in the air chamber 39 to the treatment tank 3 and recover the treatment liquid used in the treatment tank 3 into the air chamber 39. Also, an opening / closing communication hole can be provided between the treatment tank 3 and the air chamber 39 so that the treated treatment liquid can be recovered from the treatment tank 3 into the air chamber 39.

[0020] At the front end of this treatment tank 3, a front guide body 9 for guiding the laver net from the outside (front) of the hull 2 to the inside (treatment tank 3) is attached so as to be vertically rotatable via left and right bearings 10, 10. The front guide body 9 has its front part inclined forward-low and rear-high from the upper front edge of the treatment tank 3 toward the front, its rear part extending horizontally along the upper edge of the treatment tank 3, and its rear end being supported by the bearings 10, 10 so as to be vertically rotatable. Thus, the front guide body 9 can be changed in posture to a working posture (see Fig. 4(a)) suitable for guiding the laver net at sea by falling forward with respect to the hull 2 (treatment tank 3) and a non-working posture (see Fig. 4(b)) suitable for placement on land by falling backward with respect to the hull 2 (treatment tank 3).

[0021] Also, inside the treatment tank 3, an inner guide body 11 for guiding the laver net from the front side to the rear side of the treatment tank 3 is attached. The inner guide body 11 has its front part inclined forward-high and rear-low from the upper front edge of the treatment tank 3 toward the bottom surface, its middle part extending horizontally along the bottom surface of the treatment tank 3, and its rear part inclined forward-low and rear-high from the bottom surface of the treatment tank 3 toward the upper rear edge.

[0022] Also, at the rear end of the treatment tank 3, a rear guide body 12 for guiding the laver net from the inside (treatment tank 3) of the hull 2 to the outside (rear) is attached so as to be vertically rotatable via a rotation shaft 13 horizontally attached between the upper parts of the left and right rear ends of the treatment tank 3. The rear guide body 12 has its front end attached to the rotation shaft 13, with its front part inclined in a front-low rear-high state from the upper rear edge of the treatment tank 3 toward the rear, and its rear part extending horizontally rearward above the outboard motor 7. As a result, the rear guide body 12 can be changed in posture between a working posture suitable for guiding the laver net at sea by falling backward with respect to the hull 2 (treatment tank 3) (see Fig. 4(a)) and a non-working posture suitable for placement on land by falling forward with respect to the hull 2 (treatment tank 3) (see Fig. 4(b)).

[0023] Furthermore, inside the treatment tank 3, a laver net presser 14 for immersing the laver net in the treatment liquid is accommodated.

[0024] The laver net presser 14 is entirely formed in a hollow shape using a hollow pipe. Its front part is inclined in a front-high rear-low state along the front inclined part of the inner guide body 11, its middle part extends horizontally along the middle part of the inner guide body 11 (the bottom surface of the treatment tank 3), and its rear part is inclined in a front-low rear-high state along the rear inclined part of the inner guide body 11. This laver net presser 14 has its middle part immersed in the treatment liquid inside the treatment tank 3 due to the balance between its own weight and buoyancy, and only its front and rear parts protrude above the liquid level of the treatment liquid.

[0025] The above laver net treatment ship 1 is equipped with a treatment liquid supply device 15 for supplying treatment liquid to the inside of the treatment tank 3, a seawater supply device 16 for supplying seawater to the inside of the treatment tank 3, an air supply device 17 for supplying air to the inside of the treatment tank 3, a control device 18 (computer) for controlling these devices 15, 16, 17, and a power supply device 19 for supplying power to these devices 15, 16, 17 and the control device 18.

[0026] The processing liquid supply device 15 connects a pump 21 to a tank 20 storing the processing liquid, and branches and connects four processing liquid supply pipes 22 for supplying the processing liquid into the interior of the processing tank 3 to the pump 21.

[0027] The four processing liquid supply pipes 22 are horizontally attached to the upper front end, upper rear end, upper left end, and upper right end of the processing tank 3. As shown in FIG. 5, a plurality of processing liquid supply ports 23 are formed in an inclined shape along the upper front end, upper rear end, upper left end, and upper right end of the processing tank 3 toward the side wall surface of the processing tank 3.

[0028] When the control device 18 drives the pump 21, the processing liquid supply device 15 discharges the processing liquid from the processing liquid supply ports 23 of the four processing liquid supply pipes 22 toward the side wall surfaces of the upper front, rear, left, and right ends of the processing tank 3. Thereby, the processing liquid is supplied from the processing liquid supply port 23 along the side wall of the processing tank 3 from the surroundings (front, rear, left, and right) of the processing tank 3, preventing direct contact with the seaweed net being processed, and enabling the processing liquid to be stirred inside the processing tank 3 to equalize the concentration of the processing liquid.

[0029] The seawater supply device 16 connects a pump 25 to a seawater suction pipe 24 for sucking up seawater, and attaches a seawater supply pipe 26 for supplying seawater into the interior of the processing tank 3 to the pump 25.

[0030] The seawater suction pipe 24 is pivotally attached via a hinge 27 to the upper end of a bracket 6 at the rear end of the hull 2 so as to be rotatable up and down. Thereby, the seawater suction pipe 24 can be changed in posture between an operating posture suitable for sucking up seawater at sea while standing upright with respect to the hull 2 (see FIG. 4(a)) and a non-operating posture suitable for being placed on land while lying down with respect to the hull 2 (see FIG. 4(b)).

[0031] When the control device 18 drives the pump 25, the seawater supply device 16 sucks up seawater from the seawater suction pipe 24 and supplies the seawater into the interior of the processing tank 3 from the seawater supply pipe 26.

[0032] The air supply device 17 connects a pump 29 to an air suction pipe 28 for sucking outside air, and branches and connects two air supply pipes 30 for supplying air to the inside of the treatment tank 3 to the pump 29.

[0033] The two air supply pipes 30 are attached to the bottom of the hull 2 (treatment tank 3) with a space in the front-rear direction and extend in a direction (the left-right width direction of the treatment tank 3) orthogonal to the conveying direction of the laver net (the front-rear direction of the treatment tank 3). As shown in FIG. 6, a plurality of air supply ports 31 for discharging air into the treatment liquid are formed along the extending direction (the left-right width direction of the treatment tank 3) in a state of being inclined forward-low and backward-high toward the conveying direction of the laver net 38 (the rear of the hull 2 (treatment tank 3)). Thereby, the air is projected toward the laver net 38 to which the air is conveyed from the air supply port 31, and the laver net 38 can be smoothly conveyed by the discharge force of the air, and the treatment liquid can be forcibly stirred inside the treatment tank 3 to make the concentration of the treatment liquid uniform.

[0034] When the control device 18 drives the pump 29, the air supply device 17 discharges the outside air (air) sucked from the air suction pipe 28 into the treatment liquid inside the treatment tank 3 from the air supply ports 31 of the two air supply pipes 30.

[0035] A water level sensor 32 for detecting the water level (water volume) stored in the treatment tank 3 and a concentration sensor 33 for detecting the concentration (pH) of the treatment liquid stored in the treatment tank 3 are connected to the control device 18.

[0036] Then, based on the detection values of the water level sensor 32 and the concentration sensor 33, the control device 18 appropriately controls the treatment liquid supply device 15, the seawater supply device 16, and the air supply device 17 so that the concentration and water volume of the treatment liquid inside the treatment tank 3 are within a predetermined range set in advance.

[0037] For example, when the liquid level of the processing liquid detected by the liquid level sensor 32 is less than the preset lower limit value of the liquid level and the concentration of the processing liquid detected by the concentration sensor 33 is less than the preset lower limit value of the concentration, the control device 18 drives the processing liquid supply device 15 and the seawater supply device 16 to supply the processing liquid and seawater into the processing tank 3, and drives the air supply device 17 to stir the processing liquid inside the processing tank 3.

[0038] Also, when the liquid level of the processing liquid detected by the liquid level sensor 32 is equal to or higher than the preset lower limit value of the liquid level and the concentration of the processing liquid detected by the concentration sensor 33 is less than the preset lower limit value of the concentration, the control device 18 drives the processing liquid supply device 15 to supply the processing liquid into the processing tank 3, and drives the air supply device 17 to stir the processing liquid inside the processing tank 3.

[0039] Also, when the liquid level of the processing liquid detected by the liquid level sensor 32 is less than the preset lower limit value of the liquid level, and the concentration of the processing liquid detected by the concentration sensor 33 is equal to or higher than the preset lower limit value and less than the preset upper limit value, or when the concentration of the processing liquid detected by the concentration sensor 33 is equal to or higher than the preset upper limit value, the control device 18 drives the seawater supply device 16 to supply seawater into the processing tank 3, and drives the air supply device 17 to stir the processing liquid inside the processing tank 3.

[0040] The power supply device 19 connects the storage battery 35 to the solar power generation panel 34, connects the storage battery 35 and the backup battery (battery) 36 to the power switch 37, and controls the power switch 37 with the control device 18 to supply the power of either the storage battery 35 or the battery 36 to the processing liquid supply device 15, the seawater supply device 16, and the air supply device 17.

[0041] The solar power generation panel 34 is horizontally detachably attached to the rear center of the rear guide body 12 (directly above the outboard motor 7), and is attached with the back surface, which becomes the non-power generation surface of the solar power generation panel 34, facing upward in a state where the surface, which becomes the power generation surface of the solar power generation panel 34, faces downward in the working posture of the rear guide body 12.

[0042] Here, the rear guide body 12 functions as a support for supporting the solar power generation panel 34. And since the rear guide body 12 as the support is attached to the hull 2 via the pivot shaft 13 so as to be pivotable up and down, when the support (rear guide body 12) lies backward with respect to the hull 2 (treatment tank 3) and is in a working posture suitable for guiding the seaweed net at sea (see Fig. 4(a)), the back surface (non-power generation surface) of the solar power generation panel 34 faces upward. On the other hand, when the support (rear guide body 12) lies forward with respect to the hull 2 (treatment tank 3) and is in a non-working posture suitable for placement on land (see Fig. 4(b)), the front surface (power generation surface) of the solar power generation panel 34 faces upward. Thus, it is possible to prevent the seaweed net and the seawater dripping from the seaweed net from adhering to the front surface (power generation surface) of the solar power generation panel 34 during the operation of transporting the seaweed net at sea, which may cause damage or failure to the solar power generation panel 34. At the same time, the posture of the solar power generation panel 34 is changed during non-operation so that it can generate electricity well on the front surface (power generation surface).

[0043] As described above, the seaweed net processing ship 1 is configured as follows. The treatment liquid such as chemical liquid and fertilizer is stored in the treatment tank 3, and while navigating using the outboard motor 7, the seaweed net stretched on the sea surface is successively immersed in the treatment liquid in the treatment tank 3 to perform acid treatment, fertilization treatment, etc. of the seaweed net. At that time, in the seaweed net processing ship 1, the seaweed net is lifted from the sea along the front guide body 9 into the treatment tank 3, and while moving the seaweed net inside the treatment tank 3 along the inner guide body 11, the seaweed net is pressed by the seaweed net presser 14 and immersed in the treatment liquid, and then the seaweed net is conveyed from the treatment tank 3 into the sea along the rear guide body 12.

[0044] As described above, the seaweed net processing ship 1 is configured to be provided with a seawater supply device 16 for sucking up seawater and supplying the seawater into the treatment tank 3.

[0045] Therefore, in the laver net processing ship 1 with the above configuration, seawater can be supplied to the treatment tank 3 during the operations of acid treatment and fertilization treatment of laver nets at sea, and by maintaining the liquid volume and concentration of the treatment liquid stored in the treatment tank 3 within a predetermined range, the acid treatment and fertilization treatment of laver nets can be carried out well.

[0046] Further, the laver net processing ship 1 has a configuration in which the seawater supply device 16 supplies seawater to the treatment tank 3 based on the water level of the treatment liquid inside the treatment tank 3.

[0047] Therefore, in the laver net processing ship 1 with the above configuration, by maintaining the liquid volume of the treatment liquid stored in the treatment tank 3 within a predetermined range, the acid treatment and fertilization treatment of laver nets can be carried out well while maintaining the liquid volume of the treatment liquid stored in the treatment tank 3 within a predetermined range.

[0048] Further, the laver net processing ship 1 has a configuration in which the seawater supply device 16 supplies seawater to the treatment tank 3 based on the concentration of the treatment liquid inside the treatment tank 3.

[0049] Therefore, in the laver net processing ship 1 with the above configuration, by maintaining the concentration of the treatment liquid stored in the treatment tank 3 within a predetermined range, the acid treatment and fertilization treatment of laver nets can be carried out well.

[0050] Further, the laver net processing ship 1 is configured to be provided with an air supply device 17 for supplying air into the treatment tank 3.

[0051] Therefore, in the laver net processing ship 1 with the above configuration, by supplying air into the treatment tank 3 with the air supply device 17, the treatment liquid inside the treatment tank 3 can be stirred, the concentration of the treatment liquid inside the treatment tank 3 can be made uniform, and the acid treatment and fertilization treatment of laver nets can be carried out well.

[0052] Further, the laver net processing ship 1 has a configuration in which a plurality of air supply ports 31 of the air supply device 17 are arranged side by side in a direction perpendicular to the moving direction of the laver net 38 being treated in the treatment tank 3.

[0053] Therefore, in the laver net processing ship 1 with the above configuration, air can be supplied to the entire width of the laver net 38, the concentration of the processing liquid in which the laver net 38 is immersed can be made uniform, and the acid treatment and fertilization treatment of the laver net 38 can be performed even better.

[0054] In addition, the laver net processing ship 1 is configured to discharge air from the air supply port 31 of the air supply device 17 in the moving direction of the laver net 38.

[0055] Therefore, in the laver net processing ship 1 with the above configuration, the laver net 38 can be smoothly moved by effectively using the force of the air discharged from the air supply port 31, and also by this, the acid treatment and fertilization treatment of the laver net 38 can be performed even better.

[0056] In addition, the laver net processing ship 1 is provided with a support body (rear guide body 12) for supporting the solar power generation panel 34 on the hull 2 so that the posture can be changed between the posture during the processing operation of treating the laver net with the processing liquid at sea (working posture) and the posture during the non-processing operation when the laver net is not being treated with the processing liquid (non-working posture). By setting the support body (rear guide body 12) in the working posture, the back surface (non-power generation surface) of the solar power generation panel 34 faces upward, while by setting the support body (rear guide body 12) in the non-working posture, the front surface (power generation surface) of the solar power generation panel 34 faces upward.

[0057] Therefore, in the laver net processing ship 1 with the above configuration, it is possible to prevent the laver net from contacting the front surface (power generation surface) of the solar power generation panel 34 and damaging the solar power generation panel 34 during work, and also to reduce the running cost associated with the acid treatment and fertilization treatment of the laver net by driving the machines provided on the laver net processing ship 1 with the electric power generated by the solar power generation panel 34 during non-work.

[0058] In addition, the laver net processing ship 1 is provided above the outboard engine 7 provided with the support body (rear guide body 12) on the hull 2, and by setting the support body (rear guide body 12) in the working posture, the solar power generation panel 34 covers the upper part of the outboard engine 7.

[0059] Therefore, in the laver net processing ship 1 with the above configuration, the upper part of the outboard engine 7 can be protected by the solar power generation panel 34.

[0060] In addition, the laver net processing ship 1 has a configuration in which a laver net guide (rear guide body 12) for guiding the laver net provided on the hull 2 so as to be able to be tilted forward and backward from the processing tank 3 to the sea is used as a support.

[0061] Therefore, in the laver net processing ship 1 with the above configuration, the solar power generation panel 34 can be easily installed on the existing laver net processing ship.

Explanation of Signs

[0062] 1 Laver net processing ship 2 Hull 3 Processing tank 4, 5 Working space 6 Bracket 7 Outboard engine 8 Hinge 9 Front guide body 10 Bearing 11 Inner guide body 12 Rear guide body 13 Rotating shaft 14 Laver net presser 15 Processing liquid supply device 16 Seawater supply device 17 Air supply device 18 Control device 19 Power supply device 20 Tank 21 Pump 22 Processing liquid supply pipe 23 Processing liquid supply port 24 Seawater suction pipe 25 Pump 26 Seawater supply pipe 27 Hinge 28 Air suction pipe 29 Pump 30 Air supply pipe 31 Air supply port 32 Water level sensor 33 Concentration sensor 34 Solar power generation panel 35 Storage battery 36 Battery 37 Power switch 38 Laver net 39 Air chamber

Claims

1. In a laver net processing ship for processing a laver net with a processing liquid stored in a processing tank at sea, a laver net processing ship, characterized in that an air supply device for supplying air into the interior of the processing tank is provided.

2. The laver net processing ship according to claim 1, characterized in that the air supply device arranges a plurality of air supply ports side by side in a direction orthogonal to the moving direction of the laver net processed in the processing tank.

3. The laver net processing ship according to claim 2, characterized in that the air supply device discharges air from the air supply port in the moving direction of the laver net.

Images