Laver net treatment ship

Abstract

To provide a laver net treatment ship that can supply seawater to a treatment tank during a work of acid treatment or fertilization treatment of a laver net on the sea, and can excellently perform acid treatment or fertilization treatment of a laver net by holding a liquid amount or concentration of treatment liquid stored in the treatment tank within a predetermined range.SOLUTION: A laver net treatment ship (1) for treating a laver net by treatment liquid stored in a treatment tank (3) on the sea is provided with a seawater supply device (16) which sucks seawater and supplies seawater into the treatment tank (3). Further, the seawater supply device (16) supplies seawater to the treatment tank (3) on the basis of the water level of treatment liquid in the treatment tank (3). Further, the seawater supply device (16) supplies seawater to the treatment tank (3) on the basis of the concentration of treatment liquid in the treatment tank (3).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 desired to keep the liquid volume and concentration of the processing liquid stored in the processing tank within a predetermined range.

[0006] However, in a laver net processing ship, since the work is carried out at sea, due to evaporation of the processing liquid, inflow of seawater, etc., during the work, the liquid volume and concentration of the processing liquid may go outside the predetermined range, making it difficult to properly perform acid treatment or fertilization treatment of the laver net.

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, a seawater supply device for sucking up seawater and supplying the seawater to the inside of the processing tank is provided.

[0008] Further, in the present invention according to claim 2, in the present invention according to claim 1, the seawater supply device supplies seawater to the processing tank based on the water level of the processing liquid inside the processing tank.

[0009] Further, in the present invention according to claim 3, in the present invention according to claim 1 or claim 2, the seawater supply device supplies seawater to the processing tank based on the concentration of the processing liquid inside the processing tank.

Effect of the Invention

[0010] And in the present invention, the following effects are achieved.

[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 a seawater supply device for sucking up seawater and supplying the seawater to the inside of the processing tank is provided, seawater can be supplied to the processing tank during the acid treatment or fertilization treatment of laver nets at sea, and by maintaining the liquid volume and concentration of the processing liquid stored in the processing tank within a predetermined range, the acid treatment and fertilization treatment of laver nets can be carried out well.

[0012] In particular, when the seawater supply device supplies seawater to the processing tank based on the water level of the processing liquid inside the processing tank, the liquid volume of the processing liquid stored in the processing tank can be maintained within a predetermined range, and the acid treatment and fertilization treatment of laver nets can be carried out well.

[0013] Also, when the seawater supply device supplies seawater to the processing tank based on the concentration of the processing liquid inside the processing tank, the concentration of the processing liquid stored in the processing tank can be maintained within a predetermined range, and the acid treatment and fertilization treatment of laver nets can be carried out well.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode 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, the laver net processing ship 1 detachably attaches a processing tank 3 for treating the laver net with a treatment liquid inside a rectangular box - shaped hull 2 having an open upper part.

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

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

[0019] The treatment tank 3 has a bottomed rectangular box shape with an open top, and a treatment liquid such as a chemical solution or fertilizer for treating the laver net is stored inside. The laver net can be immersed in the treatment liquid to perform acid treatment or fertilization treatment on the laver net. 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, supplying the treatment liquid stored in the air chamber 39 to the treatment tank 3, and recovering the treatment liquid used in the treatment tank 3 to 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 to 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 and downward from the upper front edge of the treatment tank 3, 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. Thereby, 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 and downward 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 and upward 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 and rear-high shape from the upper rear edge of the treatment tank 3 towards the rear, and its rear part extending horizontally rearward above the outboard engine 7. As a result, the rear guide body 12 can be changed in posture between a working posture (see Fig. 4(a)) suitable for guiding the laver net at sea by falling backward 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 forward with respect to the hull 2 (treatment tank 3).

[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 and rear-low shape 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 and rear-high shape 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 part and rear part protrude above the liquid level of the treatment liquid.

[0025] The above-mentioned 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 that stores the processing liquid, and branches and connects four processing liquid supply pipes 22 for supplying the processing liquid to the inside 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 processing liquid supply device 15 drives the pump 21 with the control device 18, the processing liquid is discharged 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. As a result, the processing liquid is supplied from the processing liquid supply ports 23 along the side walls 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. At the same time, the processing liquid can 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 to the inside of the processing tank 3 to the pump 25.

[0030] The seawater suction pipe 24 is attached to the upper end of the bracket 6 at the rear end of the hull 2 via a hinge 27 so as to be rotatable up and down. As a result, 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 seawater supply device 16 drives the pump 25 with the control device 18, the seawater supply device 16 sucks up seawater from the seawater suction pipe 24 and supplies the seawater to the inside 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 extend in a direction (the left - right width direction of the treatment tank 3) perpendicular to the conveyance direction of the laver net (the front - rear direction of the treatment tank 3) with a space in the front - rear direction at the bottom of the hull 2 (treatment tank 3). As shown in FIG. 6, a plurality of air supply ports 31 for discharging air into the treatment liquid are formed to be inclined in a front - low - rear - high shape in the conveyance direction of the laver net 38 (the rear of the hull 2 (treatment tank 3)) along the extension direction (the left - right width direction of the treatment tank 3). Thereby, air is projected from the air supply port 31 toward the laver net 38 through which the air is conveyed, 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 the water volume of the treatment liquid inside the treatment tank 3 are within a predetermined range set in advance.

[0037] For example, when the water level of the processing liquid detected by the water level sensor 32 is less than the preset lower limit value of the water 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 water level of the processing liquid detected by the water level sensor 32 is equal to or higher than the preset lower limit value of the water 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 water level of the processing liquid detected by the water level sensor 32 is less than the preset lower limit value of the water 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 (cell) 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 (at a position 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 a support is attached to the hull 2 via a rotation shaft 13 so as to be vertically rotatable, 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 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 of the solar power generation panel 34, and to change the posture of the solar power generation panel 34 during non-operation so that it can generate electricity well on the front surface (power generation surface).

[0043] As described above, the seaweed net treatment ship 1 is configured such that a treatment liquid such as a chemical solution or 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. on the seaweed net. At that time, in the seaweed net treatment 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 retainer 14 and immersed in the treatment liquid, and then the seaweed net is transported from the treatment tank 3 into the sea along the rear guide body 12.

[0044] As described above, the seaweed net treatment 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] In addition, 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] In addition, 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] In addition, the laver net processing ship 1 has a configuration in which an air supply device 17 for supplying air into the treatment tank 3 is provided.

[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] In addition, 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 configured as described above, 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] Further, 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 configured as described above, 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] Further, the laver net processing ship 1 is provided on the hull 2 with a support body (rear guide body 12) for supporting the solar power generation panel 34 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 configured as described above, it is possible to prevent the laver net from contacting the front surface (power generation surface) of the solar power generation panel 34 during operation and damaging the solar power generation panel 34, 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-operation.

[0058] Further, the laver net processing ship 1 is provided above the outboard engine 7 provided on the hull 2 with the support body (rear guide body 12), 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 to and 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 symbols

[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

Claim 1 In a laver net processing ship for processing laver nets with a processing liquid stored in a processing tank at sea, A laver net processing ship characterized by being provided with a seawater supply device for sucking up seawater and supplying the seawater to the inside of the processing tank. Claim 2 The laver net processing ship according to claim 1, wherein the seawater supply device supplies seawater to the processing tank based on the water level of the processing liquid inside the processing tank. Claim 3 The laver net processing ship according to claim 1 or claim 2, wherein the seawater supply device supplies seawater to the processing tank based on the concentration of the processing liquid inside the processing tank.

Images