JPH0856513A - Ship for laver culture work - Google Patents

Abstract

PURPOSE: To enable the high turning performance of the ship over a Long period by reducing the suction of foreign matters such as laver into a thruster. CONSTITUTION: The moving rail 15 of a guide 4 for a laver net is formed in such a structure as being freely moved between a laver net-raising position wherein the front end of the laver net is submerged in the sea and a receiving position wherein the net is drawn up on the ship. The front end of the moving rail 15 at the laver net-raising position is placed at a lower position than that of a thruster 5. When the lavers are reaped and when the laver net is subjected to an acid treatment work, foreign matters floating in the sea on the front side of the ship from the thruster are caught with the submerged part of the moving rail 15. Thereby, the suction of the foreign matters into the thruster 5 is reduced to prevent the adhesion of the foreign matters to the water-sucking port of the thruster.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seaweed aquaculture work vessel used for acid treatment of seaweed nets used for aquaculture of seaweed.

[0002]

2. Description of the Related Art Conventionally, this type of seaweed aquaculture work ship has a seaweed net guide attached to the upper part of the hull, and the guide is projected forward from the bow and the front end is submerged in the sea. By moving towards
It had a structure to guide the seaweed net onto the ship.

The seaweed net guide is extended to the stern side directly above the seaweed cutting device at the front of the hull and above the bridge. There was a tank. This acid treatment tank had a structure in which the chemical solution for acid treatment was pressure-fed from a chemical solution reservoir arranged at the stern, and the chemical solution for acid treatment was sprayed onto the seaweed net moving along the guide for seaweed net.

That is, this conventional seaweed aquaculture work ship has a structure in which the seaweed net is guided on the ship by the guide for the seaweed net by advancing and returned to the sea surface after passing over the seaweed reaper and the acid treatment tank. When the seaweed net passed over the ship, the seaweed was cut and the acid treatment of the seaweed after the seaweed was cut off could be performed continuously.

In the conventional seaweed aquaculture work vessel, when the seaweed cutting work and the seaweed net acid treatment work described above are advanced, the hull is oriented from the extending direction of the seaweed net due to the influence of wind and ocean currents. Because it may shift,
The direction of the hull was finely adjusted by the thruster.

This thruster is constructed so that a propeller whose axial direction is oriented in the left-right direction is rotated in the forward or reverse direction to generate a water flow in either the left or right direction, and is embedded in the front part of the ship bottom. Was installed.

[0007]

However, in the above-mentioned conventional seaweed aquaculture work vessel, there is a problem that the turning performance when turning using a thruster deteriorates after a long time has passed. This is because foreign matter such as seaweed floating in the sea is attracted and adhered to the entrance of the water passage in which the propeller of the thruster is arranged.

The present invention has been made to solve the above problems, and it is necessary to prevent foreign matter such as seaweed from coming close to the water inlet portion of the thruster so that high turning performance can be obtained for a long period of time. To aim.

[0009]

According to the present invention, there is provided a seaweed aquaculture work vessel having a seaweed net lifting position at which the front end of a seaweed net guide protrudes forward from the bow and is submerged in the sea. It is configured to be movable between the raised storage position and the front end of the seaweed net guide at the seaweed net lifting position is positioned below the thruster.

[0010]

[Operation] By moving the hull forward with the front end of the seaweed net guide moved to the seaweed net lifting position, foreign matter floating in the sea in front of the thruster hull sinks into the sea at the front end of the seaweed net guide. It will hang on the part that is.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
It will be described in detail by. FIG. 1 is a side view of a seaweed cultivation work boat according to the present invention, FIG. 2 is a side view showing an enlarged front part of the hull in FIG. 1, and FIG. 3 is a case where a movable rail of a seaweed net guide is advanced to a seaweed net lifting position. Side view showing the state of
FIG. 4 is an enlarged side view showing the movable rail shown in FIG. Note that FIG. 3 is the same as FIG. 2 drawn on the same scale.
4 and FIG. 4 are combined and reduced to show the positional relationship between the thruster and the movable rail.

FIG. 5 is an enlarged side view showing the rear portion of the hull shown in FIG. FIG. 6 is a view showing the front part of the hull, in which the upper side shows a plan view and the lower side shows a bottom view with respect to the alternate long and short dash line in the figure. FIG. 7 is a view showing the rear part of the hull, and in this figure as well, the upper side of the dashed line in the figure shows a plan view and the lower side shows a bottom view. 6 and 7 are drawn with the acid treatment tank removed.

FIG. 8 is a sectional view of the bottom of the ship in FIG. 2 taken along line VIII-VIII, FIG. 9 is an enlarged sectional view showing the thruster mounting portion, FIG. 10 is a sectional view taken along line XX in FIG. 7, and FIG. 7
XI-XI line sectional view of the hull in FIG. 12, FIG. 12 is a sectional view showing the chemical liquid return passage from the chemical liquid storage to the chemical storage, FIG. 13 is a view showing the acid treatment tank, FIG. A plan view and the same figure (b) are the BB line sectional views in (a) figure.

FIG. 14 is a sectional view taken along line XIV-XIV in FIG. 13 (a), FIG. 15 is a sectional view taken along line XV-XV in FIG. 13 (a), and FIG. 16 is a sectional view taken along line XVI-XVI in FIG. 13 (a). ,
FIG. 17 is a view of the acid treatment tank as seen from the rear side, and the figure shows only the left half. In each of the above figures, the alternate long and short dash line C indicates the horizontal center of the hull.

In these figures, reference numeral 1 denotes a seaweed cultivation work vessel according to the present invention. The seaweed cultivation work vessel 1 continuously cuts seaweed and acid-treats the seaweed net after cutting the seaweed. It is configured so that it can be carried out. Reference numeral 2 is a hull of the seaweed aquaculture work vessel 1, 3 is a bridge, and 4 is a seaweed net guide for guiding the seaweed net onto the ship.

As shown in FIGS. 6 and 8, the front portion of the hull 2 is formed in a trimaran shape, and the central projection 2a protruding downward at the central portion in the left-right direction generates a water flow in the left-right direction. A thruster 5 that changes the direction of the hull is attached. In FIG. 8, reference numerals 2b and 2c are left and right protrusions that protrude downward on the left and right of the central protrusion 2a having the thruster 5. The projection 2a is formed so as to point downward as shown in FIG. Further, as shown in FIGS. 1 and 2, a portion of the central protrusion 2a rearward of the thruster 5 is gradually unevenly distributed upward and is connected to a horizontal portion 2d extending to the rear of the hull. That is, the portion of the ship bottom behind the portion to which the thruster 5 is attached does not project downward.

As shown in FIG. 9, the thruster 5 has a structure in which a propeller 5a whose axis is oriented in the left-right direction is rotated by a hydraulic motor in the cabin, and is fixed to the hull 2 via a tubular connecting member 5c. Has been done. The hydraulic pressure for driving the hydraulic motor 5b is configured so that the engine 6 (FIG. 5) mounted on the rear part of the hull drives a hydraulic pump (not shown). Also,
By switching the hydraulic circuit of the hydraulic pressure supplied to the hydraulic motor 5b in the forward or reverse direction, the propeller 5a is switched between the normal rotation and the reverse rotation, so that the hull 2 can turn in either the left or right direction. Further, the tubular connecting member 5c
Screens (not shown) for preventing foreign matter in the sea from hitting the propeller 5a are provided in the openings at both ends of the. This screen is formed by combining stainless steel pipes in a grid pattern.

The reference numeral 7 at the rear portion of the hull 2 is a conventionally well-known drive unit that constitutes an inboard / outboard motor together with the engine 6, and the reference numeral 8 provided at the substantially central portion of the hull 2 in the front-rear direction is described later. Is a chemical liquid storage for storing the acid treatment chemical liquid to be supplied to the acid treatment tank.

The nori net guide 4 is formed by combining stainless steel pipes, and a plurality of columns 10 are vertically installed on top rails 9 at the upper and left edges of the hull 2 with front and rear intervals.
And a pair of left and right seaweed net rails 11 welded to the upper edges of these struts 10 and extending from the front of the hull to above the bridge 3 to the rear of the hull, and the front struts 1
A pair of left and right guide rails 13 extending backward from the lower part of 0 to the vicinity of the front of the chemical reservoir 8 and having rear ends fixed to the deck 12 of the hull 2, and sliding guide pipes having rear ends on the guide rails 13. A movable rail that is connected through 14 and is supported by a cross pipe 11a (FIG. 6) that is laterally bridged between the foremost portions of the left and right seaweed net rails 11 so as to be movable back and forth in parallel. It is formed from fifteen or the like. The movable rail 15 constitutes the front end of the seaweed net guide according to the present invention.

The slide tube 14 has a guide rail 13 penetrating inwardly and is slidably supported by the guide rail 13 in the longitudinal direction, and a rear end portion of a movable rail 15 is connected to the slide tube 14. ing. As shown in FIG. 6, the movable rail 15 has a main pipe 15a whose rear end is connected to the sliding pipe 14 and extends forward and backward, and a cross pipe 15 which extends leftward and rightward.
b and a sub pipe 15c extending forward from the cross pipe 15b, the front portion extends forward from between the left and right seaweed net rails 11, 11. The extending portion is formed so that the width thereof becomes gradually narrower toward the front in a plan view and the tip is sharpened.

Further, as shown in FIGS. 1 and 2, the movable rail 15 is curved so as to have a substantially V-shape when viewed from the side, and the sliding tube 14 is guided by the guide rail 13.
3 is moved to the front end and moved to the most front side, the front part is configured to be submerged in the sea while being inclined downward to the front as shown in FIGS. 3 and 4. The position of the movable rail 15 shown in FIGS. 3 and 4 becomes the seaweed net lifting position, and the movable rail 1 shown in FIGS.
The position 5 is the storage position. The two-dot chain line L in FIGS. 3 and 4 indicates the sea surface, and the symbol N indicates the seaweed net drifting on the sea surface.

The length of the movable rail 15 in the front-rear direction is such that the front end of the movable rail 15 is moved to the seaweed net lifting position shown in FIGS. It is set so as to be positioned downward with respect to.

In order to guide the seaweed net floating on the sea surface onto the ship using the seaweed net guide 4 constructed as described above, first, the movable rail 15 is moved forward from the stored state shown in FIGS. 1 and 2. Move to. At this time, the sliding tube 14 is slid forward with respect to the guide rail 13, and
The movable rail 15 is slid against the cross pipe 11a while being supported by the cross rail 11a.

When the sliding tube 14 is moved to the front end portion of the guide rail 13, the movable rail 15 is formed in a letter shape in a side view, so that the front portion thereof is as shown in FIGS. 3 and 4. It will be submerged in the sea in a state of inclining to the front.

Next, the seaweed cultivation work vessel 1 is advanced from the state shown in FIGS. 3 and 4. As a result, the seaweed net N
Rides on the mobile rail 15 and the seaweed aquaculture work vessel 1 further advances, so that the seaweed moves on the seaweed rail 11 from the mobile rail 15 and moves backward on the ship. You will descend from the rear end of the rail 11 to the sea surface. In the seaweed cultivation work vessel 1 according to the present invention, when the seaweed net N moves on the ship, the seaweed is cut and the seaweed net is subjected to acid treatment.

Reference numeral 16 is a cutting device for cutting seaweed. The cutting device 16 has a conventionally known structure for cutting the seaweed from the seaweed net by rotating a not-shown cutting blade around an axis line in the left-right direction. Supported.

Reference numeral 18 is an acid treatment tank for performing acid treatment on the seaweed net N after the seaweed is cut off. This acid treatment tank 18
Is integrally formed of a fiber-reinforced plastic in a substantially dish shape that opens upward, and when the seaweed net N moves on the acid treatment tank, the seaweed net N is added to the acid treatment chemical solution stored in the dish portion. It is soaked and sprayed with a chemical solution from a nozzle, which will be described later, to allow the acid treatment chemical solution to penetrate into the seaweed net.

As shown in FIG. 13, the acid treatment tank 18 has flanges 18a on its left and right side edges and front and rear edges.
Are formed in series and are supported and fixed to the seaweed net guide 4 through the flange 18a. The structure of this fixed portion is such that the left and right seaweed net rails 11, the acid treatment tank front side cross pipe (not shown) and the acid treatment tank rear side cross pipe 11b which are horizontally provided between these rails 11, 11.
As shown in FIGS. 15 to 17, a flat plate-like support plate 19 is welded to the lower edge of (FIG. 7), and the flange 18a is placed on the support plate 19 and fastened together by bolts and nuts. It is structured.

As shown in FIG. 1, the acid treatment tank 18 is formed to be long in the front and rear direction from the rear of the mowing device 16 to the upper part of the bridge 3 to reach the stern, and as shown in FIG. The first processing unit 20 to which the chemical liquid is supplied from the chemical liquid storage 8 is formed in the bridge 3
In order to guide the chemical solution overflowing from the first acid treatment section 20 through the left and right overflow passages 22 to the second acid treatment section 21, the second acid treatment section 21 is formed on the rear side and the left and right sides. The chemical liquid groove 23 is formed.

The first acid treatment section 20 is integrally formed with a chemical liquid supply passage 24 over the entire circumference in the portion forming the side wall thereof. This chemical liquid supply path 24 is shown in FIG. 14 and FIG.
As shown in, the cross section is formed in a substantially quadrangular shape, and two chemical liquid supply hoses 25 are connected to the portion extending in the left-right direction immediately before the bridge 3 as a left-right pair. The lower surface 24a of the portion extending right and left immediately before the bridge 3 is positioned lower than the front upper edge of the bridge 3 as shown in FIG.

In addition, in the portion that partitions the chemical liquid supply passage 24 from the first acid treatment portion 20, the chemical liquid in the chemical liquid supply passage 24 is jetted obliquely upward in the first acid treatment portion 20. The nozzle 26 is formed. This nozzle 26
A large number are formed at intervals in the circumferential direction over the entire circumference of the first acid treatment portion 20, and each of them is configured such that the ejection angle indicated by the symbol α in FIG. 14 is about 45 degrees. 14 and 15, the upper and lower opening widths are drawn wider than they actually are to facilitate understanding of the structure of the nozzle 26.

Furthermore, the first nozzle 26 is formed.
The peripheral wall portion of the acid treatment section 20 has an upper edge corner portion (indicated by reference symbol R in FIGS. 14 and 15) so that the seaweed net N does not get caught in this portion when moving on the acid treatment tank 18. ) Is rounded.

The lower end of the chemical liquid supply hose 25 is connected to the chemical liquid supply pump 27 as shown in FIGS. 5 and 12. The chemical liquid supply pump 27 is configured to pump up the chemical liquid from the chemical liquid storage 8 and pressure-feed the chemical liquid to the chemical liquid supply passage 24 via the chemical liquid supply hose 25.

As shown in FIG. 5, the chemical storage 8 has a bridge 3
Is arranged in front of and below the acid treatment tank 18,
It is formed integrally with the hull 2 at the bottom of the hull 2 so as to extend from one side in the left-right direction to the other side. And this chemical storage 8
As shown in FIG. 5 and FIG. 11, the foamed plastic 29 is interposed between the bottom portion 8a and the ship bottom 28 to form a substantially double bottom. That is, it has a double bottom structure so that the rigidity of the chemicals reservoir 8 can be easily ensured.

As shown in FIG. 13 (a), the left and right sides of the second acid treatment section 21 are communicated with the chemical solution groove 23.
As shown in FIG. 3 (b), the rear part is inclined downward and communicates with the chemical liquid recovery part 30. This chemical solution recovery unit 30
Are provided at two positions on the left and right sides of the rear end of the second acid treatment unit 21, and each is connected to the rear end of the chemical liquid groove 23 so that the chemical liquid flows down to the left and right chemical liquid return ports 30a. Has been formed. FIG. 17 shows a state where the chemical liquid recovery section 30 is viewed from the rear. An open space S is formed between the left and right chemical liquid recovery parts 30 and in the center of the hull in the left-right direction, as shown in FIG.

The chemical liquid return port 30a has a chemical liquid recovery section 30.
The hose 31 is connected to a chemical solution storage hose 32 at the rear of the hull shown in FIG. As shown in FIG. 7, the chemical liquid storage 32 is arranged at two positions on the left and right of the rear part of the hull, and the chemical liquid storage 32 is provided at the upper portion facing the lower end of the chemical liquid return hose 31 as shown in FIG.
As shown in FIG. 2, a tray 3 having a wire net 33 for removing foreign matter
4 is attached. Further, the left and right chemical liquid storage chambers 32 have the chemical liquid discharge ports 32a at the bottom thereof connected to the upper rear side of the chemical liquid storage chamber 8 via the left and right chemical liquid return passages 35.

The chemical liquid return passage 35 is formed along the lower surface of the deck 12 as shown in FIG. The deck 12 is formed in the front part of the bridge so that the rear part of the hull is higher than the front part with a step, and the high rear part is inclined downward as shown in FIG.
That is, the chemical liquid return passage 35 is formed with the deck 12 as a part of the passage wall, and is configured to use the inclination of the deck 12 to flow the chemical liquid from the chemical liquid storage 32 to the chemical liquid storage 8.

A reference numeral 36 in FIG. 10 is a ventilation pipe which connects the engine room K below the deck 12 to the atmosphere. The ventilation pipe 36 penetrates the side edge of the deck 12 in the vertical direction, and the portion located above the deck 12 faces downward toward the inside of the top rail 9 formed in the end face downward U shape. It is bent in a U shape.

Next, the operation of the acid treatment apparatus constructed by connecting the chemical solution storage 8 and the chemical solution storage 32 to the acid treatment tank 18 as described above will be described. First, when the chemical liquid supply pump 27 is operated, the chemical liquid in the chemical liquid storage 8 is pressure-fed from the chemical liquid supply hose 25 to the chemical liquid supply passage 24 of the acid treatment tank 18, and is stored therein. Then, when the chemical liquid supply path 24 is filled with the chemical liquid, the chemical liquid is discharged from the nozzle 26 to the first acid treatment unit 2
It is jetted toward 0 above. The ejected chemical solution is stored in the first acid treatment section 20, and when the liquid surface reaches the overflow path 22, the chemical solution overflows into the chemical solution groove 23 through the overflow path 22.

The chemical liquid that has flowed out into the chemical liquid groove 23 travels down there and flows backward, and most of it flows into the second acid treatment section 21 and the rest flows into the chemical solution recovery section 30. The chemical liquid that has flowed into the second acid treatment unit 21 travels backward through this and flows out to the chemical liquid recovery unit 30. Then, the chemical liquid recovery unit 30
The chemical solution that has flowed into the chemical solution return port 30a flows into the chemical solution storage 32 through the chemical solution return hose 31 and the wire net 33, and further from the chemical solution outlet 32a of the chemical solution storage 32 through the chemical solution return passage 35. It will be returned to 8.

In order to mow the seaweed and to treat the seaweed net with the seaweed aquaculture work vessel 1 equipped with the acid treatment apparatus thus constructed, as shown in FIGS. 3 and 4, the movable rail 15 is used. The hull 2 is advanced to the nori net lifting position, and the hull 2 is advanced toward the nori net N while the nori cutting device 16 and the chemical supply pump 27 are operated. The thruster 5 is used when finely adjusting the traveling direction to the left and right.

When the seaweed net N is guided by the seaweed net guide 4 and reaches above the seaweed cutting device 16, the seaweed hanging from the seaweed net N is cut off. The cut seaweed is stored in the lower front part of the deck 12.
Then, when the hull 2 further advances and the seaweed net N from which the seaweed has been cut off reaches the first acid treatment section 20 of the acid treatment tank 18, the seaweed net N diagonally inclines from below from the chemical liquid ejected from the nozzle 26. While being sprayed, the first acid treatment unit 20
It is immersed in the chemical solution stored inside and the chemical solution permeates.

The seaweed net N passing through the first acid treatment section 20 is
After passing above the bridge 3, it reaches the second acid treatment section 21, and the chemical liquid flowing in the second acid treatment section 21 adheres thereto. That is, the seaweed net N is acid-treated by both the first acid treatment 20 and the second acid treatment unit 21.

Thus, the seaweed net N to which the chemical solution is attached in the second acid treatment section 21 is guided to the stern side by the seaweed net rail 11 and returned to the sea surface. As a result, the cutting work of the seaweed and the acid treatment of the seaweed net are continuously performed.

When the traveling direction of the hull 2 does not coincide with the extending direction of the seaweed net N due to the influence of wind or ocean current, the thruster 5 is driven to adjust the traveling direction to the left or right. For example, by causing the thruster 5 to generate a water flow from the left side to the right side of the hull 2, the front part of the hull moves to the left.
This water flow is generated when the propeller 5a of the thruster 5 rotates, seawater is sucked into one of the open ends of the tubular connecting member 5c, and is ejected from the other open end.

When the movable rail 15 of the seaweed net guide 4 is moved to the seaweed net lifting position and the hull 2 is moved forward to carry out the seaweed cutting work and the acid treatment work of the seaweed net, the front end of this movable rail 15 is moved. Will move forward in the sea while being positioned below the thruster 5.
Therefore, at the time of the above-mentioned work, foreign matters floating in the sea on the front side of the hull of the thruster 5 come to be caught on the portion of the front end portion of the seaweed net guide submerged in the sea, and there are few foreign matters near the water suction port of the thruster 5. It becomes a state.

Therefore, as described above, the thruster 5
When this is used, the thruster 5 comes to suck in seawater containing few foreign matters. Therefore, it is possible to prevent the seaweed and other foreign matter drifting in the sea from being attracted to and attached to the screens provided in the openings at both ends of the tubular connecting member 5c in the thruster 5.

As shown in this embodiment, a cross pipe 11a extending in the width direction of the hull and supporting the movable rail 15 is provided at the front of the hull, and the movable rail 1 is provided.
5, a pair of left and right guide rails 13 that slidably support the rear end portion and extend in the longitudinal direction of the hull are provided, and the front end portion of the guide rail 13 is fixed to the hull 2 behind the cross pipe 11a. If you take the following 2
There are two advantages. (1) Since the movable rail 15 is supported by the cross pipe 11a, it is possible to prevent the hull 2 from being damaged when the movable rail 15 is moved back and forth. (2) Connect the front end of the guide rail 13 to the cross pipe 11a.
Since it was fixed to the hull behind the cross pipe 11a
Even if the position of is lowered, it does not interfere with the guide rail 13. For this reason, the position of the cross pipe 11a can be lowered, and the front end of the movable rail 15 can be positioned at a lower position, so that the foreign matter floating in the sea on the front side of the hull from the thruster 5 can be removed more reliably.

Further, if the cross pipe 11a is constructed so as to be laterally stretched between a pair of left and right rails 11 for seaweed net extending from the front part of the hull to the rear part of the hull, the cross pipe 1a
The rigidity of the rail 11 for seaweed net is improved by 1a.

[0050]

As described above, the ship for working with seaweed according to the present invention is provided with a seaweed net lifting position at which the front end portion of the seaweed net guide protrudes forward from the bow and is submerged in the sea. Since the front end of the seaweed net guide at the seaweed net lifting position is located below the thruster, the front end of the seaweed net guide When the hull is moved forward while being moved to the nori net lifting position, foreign matter drifting in the sea in front of the thruster hull is applied to the part of the front end of the nori net guide immersed in the sea.

Therefore, the vicinity of the water suction port of the thruster is in a state in which there is little foreign matter, so that the thruster sucks in seawater with little foreign matter. For this reason, it is possible to prevent foreign matter such as seaweed floating in the sea from clogging the water suction port of the thruster, so that high turning performance can be obtained for a long period of time.

[Brief description of drawings]

FIG. 1 is a side view of a seaweed cultivation work boat according to the present invention.

FIG. 2 is a side view showing an enlarged front part of the hull in FIG.

FIG. 3 is a side view showing a state in which the movable rail of the nori net guide is advanced to the nori net lifting position.

4 is an enlarged side view showing the movable rail shown in FIG.

FIG. 5 is a side view showing the rear part of the hull in FIG. 1 in an enlarged manner.

FIG. 6 is a view showing the front part of the hull, in which the upper side shows a plan view and the lower side shows a bottom view with respect to the alternate long and short dash line in the figure.

FIG. 7 is a view showing the rear part of the hull, in which also the upper side of the dashed line in the figure shows a plan view and the lower side shows a bottom view.

8 is a cross-sectional view of the bottom of the ship in FIG. 2 taken along the line VIII-VIII.

FIG. 9 is an enlarged sectional view showing a thruster mounting portion.

FIG. 10 is a sectional view taken along line XX in FIG.

11 is a cross-sectional view of the hull of FIG. 7 taken along line XI-XI.

FIG. 12 is a cross-sectional view showing a chemical liquid return passage from the chemical liquid storage to the chemical liquid storage.

13A and 13B are views showing an acid treatment tank, FIG. 13A is a plan view of the left half portion, and FIG. 13B is a sectional view taken along line BB in FIG. 13A.

FIG. 14 is a sectional view taken along line XIV-XIV in FIG.

FIG. 15 is a sectional view taken along line XV-XV in FIG.

16 is a sectional view taken along line XVI-XVI in FIG.

FIG. 17 is a view of the acid treatment tank as viewed from the rear.

[Explanation of symbols]

1 ... Nori aquaculture work boat, 2 ... Hull, 3 ... Bridge, 4 ...
Nori net guide, 5 ... Thruster, 8 ... Chemical storage, 11 ...
Nori net rail, 12 ... deck, 13 ... guide rail,
14 ... Sliding tube, 15 ... Movable rail, 16 ... Nori cutting device, 18 ... Acid treatment tank, N ... Nori net.

Claims (1)

[Claims] 1. A nori net guide for drawing the nori net from the surface of the sea to the rear of the hull is provided, and a thruster for generating a water flow in the lateral direction of the hull to change the direction of the hull is provided at the front of the bottom of the hull. In the ship for seaweed aquaculture operation, the front end of the guide for seaweed net, a position where the front end projects forward from the bow and is immersed in the sea, and a seaweed net lifting position,
It is configured to move freely between the storage position pulled up on the ship and the front end of the nori net guide at the nori net lifting position.
A ship for seaweed aquaculture, characterized by being positioned at a position lower than the thruster.