JPH0856456A - Ship for laver cultivation work - Google Patents

Abstract

PURPOSE: To facilitate the balance of a front and rear weight of a ship body when a treating liquid tank is loaded. CONSTITUTION: An acid treating tank 18 is constructed through from the front to the rear part of the bridge 3 of a ship body. A treating liquid tank 8 is placed at the front part of the bridge 3 and below the acid treating tank 18. A treating liquid receiving tank 32 for tentatively storing the treating liquid recovered from the acid treating tank 18 and returning it to the treating liquid tank 8 is placed at the rear part of the bridge 3. This structure enables the location of the treating liquid tank 8 close to the center of the front and back direction of the ship body and further enables the separate loading of the treating liquid to the front and the rear part of the bridge 3. Accordingly, it easily offers the balance of a front and rear weight of the ship body 2.

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, a seaweed cultivation work boat of this type 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.

[0004] That is, this conventional seaweed cultivation work boat has a structure in which the seaweed net is guided on the ship by the seaweed net guide 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.

[0005]

However, in the above-mentioned conventional seaweed aquaculture work boat, a relatively large-capacity chemical storage for storing the acid treatment chemical is arranged at the stern, so that the weight of the hull is about the same. There was a problem that it was difficult to balance.

The present invention has been made to solve the above problems, and an object of the present invention is to facilitate the weight balance between the front and the rear of a hull when arranging a chemical storage for storing a chemical for acid treatment.

[0007]

According to a first aspect of the present invention, there is provided a seaweed aquaculture work vessel in which an acid treatment tank is formed in front of and behind the bridge, and a chemical solution reservoir for storing a chemical solution for acid treatment is provided in front of the bridge. In addition to being arranged below the treatment tank, a chemical solution storage for temporarily storing the chemical solution recovered from the acid treatment tank and returning it to the chemical solution storage is disposed behind the bridge.

A ship for seaweed aquaculture work according to a second aspect of the present invention is the passage for returning the liquid medicine from the liquid medicine storage to the liquid medicine storage by inclining the rear portion of the deck forward and downward in the ship for the seaweed aquaculture work according to the first invention. Is formed along the lower surface of the front lowering portion of the deck.

A laver aquaculture work vessel according to a third aspect of the present invention is the laver aquaculture work vessel according to the first aspect of the invention, in which the passages for flowing the chemical solution from the acid treatment tank to the chemical solution storage are separately arranged at two locations on the left and right. It was done.

According to a fourth aspect of the present invention, there is provided a seaweed cultivation work vessel according to the first invention, wherein a passage for supplying a chemical solution to the acid treatment tank is provided integrally with a side wall portion of the acid treatment tank. A ship for seaweed aquaculture, which is characterized by that.

According to a fifth aspect of the present invention, there is provided a laver aquaculture work vessel according to the first aspect, wherein the lower surface of the portion of the acid treatment tank located on the front side of the bridge is located above the front upper edge of the bridge. It is located in the low position.

[0012]

According to the first aspect of the present invention, the chemical solution is brought closer to the longitudinal center of the hull and the chemical solution is dispersed before and after the bridge. According to the second invention, a part of the passage wall of the chemical liquid return passage for returning the chemical liquid from the chemical liquid storage to the chemical liquid storage can be formed by the deck.

According to the third aspect of the invention, an open space can be obtained in the central portion in the left-right direction behind the bridge. According to the fourth aspect of the present invention, since the chemical liquid supply passage does not project to the portion serving as the movement path of the seaweed net, the seaweed net does not wear the chemical liquid passage forming portion.

According to the fifth aspect of the present invention, even if the seaweed flies from above on the bridge, the acid treatment tank functions as a shielding member, and the seaweed is present in the gap between the bridge and the acid treatment tank. Prevent entry.

[0015]

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. 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 state in which a seaweed net guide is advanced to a seaweed net lifting position. FIG. 4 is a side view showing the rear part of the hull in FIG. 1 in an enlarged manner. FIG. 5 is a view showing the front part of the hull. In FIG. 5, 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. 6 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. 5 and 6 are drawn with the acid treatment tank removed.

7 is a sectional view taken along line VII-VII of the bottom of the ship in FIG. 2, FIG. 8 is an enlarged sectional view showing a thruster mounting portion, FIG. 9 is a sectional view taken along line IX-IX in FIG. 6, and FIG. 6
11 is a sectional view showing a chemical liquid return passage from the chemical liquid storage to the chemical storage, FIG. 12 is a view showing an acid treatment tank, and FIG. A plan view and the same figure (b) are the BB line sectional views in (a) figure.

FIG. 13 shows XIII-XIII in FIG.
12 is a sectional view taken along line XIV-XIV in FIG. 12A, and FIG. 15 is a sectional view taken along line XV-XV in FIG. 12A.
FIG. 16 is a view of the acid treatment tank as seen from the rear side, and the figure shows only the left half portion. In each of the above figures, the alternate long and short dash line C indicates the horizontal center of the hull.

In these drawings, reference numeral 1 denotes a seaweed cultivation work vessel according to the present invention. This 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. 5 and 7, the hull 2 has a trimaran-shaped front portion, and a central projection 2a projecting downward at the center 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. 7, 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. 8, the thruster 5 has a structure in which a propeller 5a whose axial line is oriented in the left-right direction is rotated by a hydraulic motor in the cabin, and is fixed to the hull 2 through 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. 4) mounted on the rear portion 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 known drive unit which constitutes an inboard / outboard motor together with the engine 6, and the reference numeral 8 provided at a substantially central portion in the front-rear direction of the hull 2 will be described later. Is a chemical liquid storage for storing the acid treatment chemical liquid to be supplied to the acid treatment tank.

The seaweed net guide 4 is formed by combining stainless steel pipes, and a plurality of pillars 10 are erected on the top rails 9 at the upper and left upper 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 via 14 and is supported by a cross pipe 11a (FIG. 5) 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 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. 5, the movable rail 15 includes a main pipe 15a connected to the sliding pipe 14 and extending in the front-rear direction, a cross pipe 15b extending in the left-right direction, and a sub-pipe 15c extending forward from the cross pipe 15b.
And the front portion extends forward from between the left and right seaweed net rails 11, 11. And
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. In addition, as shown in FIGS. 1 and 2, the movable rail 15 is curved so as to have a substantially V shape in a side view.

In order to guide the seaweed net drifting on the sea surface to the ship by 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. To move. At this time, the sliding pipe 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 pipe 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 of the movable rail 15 is lowered frontward as shown in FIG. It will be submerged in the sea in a tilted state. In FIG. 3, the two-dot chain line L indicates the sea surface, and N indicates the seaweed net floating on the sea surface.

Next, the seaweed cultivation work vessel 1 is advanced from the state shown in FIG. As a result, the seaweed net N rides on the mobile rail 15, and when the seaweed aquaculture work boat 1 further moves forward, the seaweed net N moves from the mobile rail 15 to the seaweed net rail 11 and moves backward on the ship. After that, from the rear end of the seaweed net 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 subjecting the seaweed net N after the seaweed is cut off to an acid treatment. 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. 12, 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.
A flat plate-like support plate 19 is welded to the lower edge of (FIG. 6) as shown in FIGS. 14 to 16, 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 extend from the rear of the mowing device 16 to the stern through the upper part of the bridge 3 and to the front of the bridge 3, 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 solution 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. 13 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. In addition, 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, a portion for partitioning the chemical liquid supply passage 24 from the first acid treatment portion 20 is provided for ejecting the chemical liquid in the chemical liquid supply passage 24 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 section 20, and each of them is configured so that the ejection angle indicated by the symbol α in FIG. 13 is about 45 degrees. Note that, in FIGS. 13 and 14, the upper and lower opening widths are drawn wider than they actually are to facilitate understanding of the configuration of the nozzle 26.

In addition, the first nozzle 26 is formed.
The peripheral wall portion of the acid treatment section 20 has a corner portion at the upper edge (indicated by a symbol R in FIGS. 13 and 14) 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 a chemical liquid supply pump 27 as shown in FIGS. 4 and 11. 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. 4, the chemical storage 8 is provided with 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. 4 and FIG. 10, 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. 12A, the left and right sides of the second acid treatment section 21 are communicated with the chemical solution groove 23.
As shown in FIG. 2 (b), the rear part is inclined rearward and communicates with the chemical liquid recovery part 30 at the rear part. 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. 16 shows a state in which 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 is provided in the chemical liquid recovery section 30.
4 is connected to a chemical liquid storage 32 at the rear of the hull shown in FIG. As shown in FIG. 6, 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. 1, the tray 3 having the 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. In addition,
The deck 12 is formed so that the rear side of the hull is higher than the front side with a step at the front of the bridge, and the high rear 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. 9 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 constituted 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 acidify the seaweed net by the seaweed aquaculture work vessel 1 equipped with the acid treatment apparatus thus constructed, the movable rail 15 is moved forward as shown in FIG. With the nori cutting device 16 and the chemical solution supply pump 27 being operated, the hull 2 is advanced toward the nori net N. 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.

Therefore, in this seaweed farming work vessel 1, the acid treatment tank 18 is formed over the front and rear of the bridge 3, and the chemical liquid storage 8 for storing the chemical liquid is arranged in front of the bridge 3 and below the acid treatment tank 18. In addition, since the chemical solution storage 32 that temporarily stores the chemical solution recovered from the acid treatment tank 18 and returns it to the chemical solution storage 8 is arranged behind the bridge 3, the chemical storage 8 approaches the center of the hull 2 in the front-rear direction. At the same time, since the liquid medicine is dispersed before and after the bridge 3, the weight difference between the front portion and the rear portion of the hull becomes small, and the front-rear balance becomes easy.

Further, since the rear portion of the deck 12 is inclined downward to the front and the chemical liquid return passage 35 is formed along the lower surface of the front downward portion of the deck 12, the deck 12 serves as a part of the passage wall of the chemical liquid return passage 35. It is available and has a simple structure. Further, since the chemical liquid recovery section 30 for flowing the chemical liquid from the acid treatment tank 18 to the chemical liquid storage 32 is arranged in two places on the left and right,
An open space S can be obtained at the center of the bridge in the left-right direction, so that a rear view can be secured.

Furthermore, since the chemical liquid supply passage 24 for supplying the chemical liquid to the acid treatment tank 18 is integrally provided on the side wall portion of the first acid treatment portion 20, the chemical liquid supply passage 24 is provided at the portion which becomes the movement route of the seaweed net N. Since it does not protrude, it is not worn by the seaweed net N.

In addition, the bridge 3 in the acid treatment tank 18
Since the lower surface of the portion located on the front side (the lower surface of the chemical liquid supply path 24 extending left and right in the vicinity of the bridge) is positioned lower than the front upper edge of the bridge 3, seaweed may fly to the upper portion of the bridge 3 from the front. Even if there is, the acid treatment tank 18 functions as a shielding member and can prevent seaweed from entering the gap between the bridge 3 and the acid treatment tank 18.

In addition, in this embodiment, when the acid treatment tank 18 is supported by the nori net guide 4, the nori net rail 1 is used.
Since the support plate 19 welded to the lower part of 1 supports the flanges 18a of the acid treatment tank 18 and bolts these, the seaweed net N should be caught in the acid treatment tank 18 when moving on the rail 11. It is possible to smoothly move the seaweed net N without the presence. Further, if the nozzle 26 provided in the acid treatment tank 18 is structured to eject the chemical liquid at about 45 degrees as shown in this embodiment, the chemical liquid can be reliably sprayed onto the nori net N.

Furthermore, as shown in the present embodiment, the left protrusion 2b and the right protrusion 2c are formed on both the left and right sides of the central protrusion 2a in which the thruster 5 is formed by forming the front portion of the ship bottom into a trimaran shape.
As a result of the provision of the above, the water droplets when moving forward are left and right protrusions 2b, 2c.
It makes it harder to fly to the side. Besides, the central protrusion 2
Since the lower end of a is sharpened, it is even more difficult for wave splashes to rise.

In addition, as shown in this embodiment, the central projection 2a of the bottom of the ship is formed so that the rear part thereof does not project downward from the portion where the thruster 5 is provided. It is difficult for the bottom to resist when the front turns left or right. That is, thruster 5
The steering efficiency of is improved.

When the ventilation pipe 36 is exposed to the inside of the top rail 9 of the hull 2 as shown in this embodiment, it becomes difficult for water to enter the engine room or the like through the ventilation pipe 36.

[0054]

As described above, in the laver aquaculture work vessel according to the first aspect of the present invention, the acid treatment tank is formed over the front and rear of the bridge, and the chemical storage for storing the acid treatment chemical is provided in front of the bridge. The chemical solution storage is located below the acid treatment tank, and behind the bridge is a chemical solution storage tank that temporarily stores the chemical solution recovered from the acid treatment tank and returns it to the chemical solution storage. At the same time, since the liquid medicine is dispersed before and after the bridge, it becomes easy to balance the front and rear weight of the hull.

The seaweed cultivation work vessel according to the second aspect of the present invention is the passage for returning the chemical solution from the chemical solution storage to the chemical solution storage by inclining the rear part of the deck to the front downward direction in the seaweed culture work vessel according to the first invention. Since it is formed along the lower surface of the front lowering portion of the deck, a part of the passage wall of the chemical liquid return passage for returning the chemical liquid from the chemical liquid storage to the chemical liquid storage can be formed by the deck.

Therefore, since the deck can be used to form the chemical liquid return passage, the structure of the chemical liquid return passage can be simplified.

According to the third aspect of the present invention, there is provided a seaweed aquaculture work vessel according to the first aspect of the present invention, in which a passage for flowing a chemical solution from an acid treatment tank to a chemical solution storage is divided into two parts, left and right. As a result, an open space is obtained at the center of the bridge in the left-right direction, and a rear view can be secured.

Since the seaweed cultivation work vessel according to the fourth aspect of the present invention is the seaweed cultivation work vessel according to the first aspect of the present invention, the passage for supplying the chemical solution to the acid treatment tank is provided integrally with the side wall portion of the acid treatment tank. Since the chemical liquid supply passage does not project to the portion which becomes the movement path of the seaweed net, the seaweed net does not wear the chemical liquid passage forming portion.

According to the fifth aspect of the present invention, there is provided the seaweed cultivation work vessel according to the first invention, wherein the lower surface of the portion of the acid treatment tank located on the front side of the bridge is located above the front upper edge of the bridge. Since it is located in a low position, even if seaweed may fly from the front to the top of the bridge, the acid treatment tank functions as a shielding member, preventing seaweed from entering the gap between the bridge and the acid treatment tank. be able to.

[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 nori net guide is advanced to a nori net lifting position.

FIG. 4 is a side view showing the rear part of the hull in FIG. 1 in an enlarged manner.

FIG. 5 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. 6 is a view showing the rear part of the hull, in which also the upper side of the chain line shows a plan view and the lower side shows a bottom view.

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

FIG. 8 is an enlarged sectional view showing a thruster mounting portion.

9 is a sectional view taken along line IX-IX in FIG.

10 is a cross-sectional view taken along the line XX of the hull in FIG.

FIG. 11 is a cross-sectional view showing a chemical liquid return passage from the chemical liquid storage to the chemical liquid storage.

12A and 12B are views showing an acid treatment tank, FIG. 12A is a plan view of a left half portion, and FIG. 12B is a sectional view taken along line BB in FIG. 12A.

13 is a sectional view taken along line XIII-XIII in FIG.

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.

FIG. 16 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 ...
Seaweed net guide, 5 ... Thruster, 8 ... Chemical storage, 12 ...
Deck, 16 ... Nori cutting device, 18 ... Acid treatment tank, 2
0 ... 1st acid treatment part, 21 ... 2nd acid treatment part, 24 ... Chemical liquid supply passage, 30 ... Chemical liquid recovery part, 32 ... Chemical liquid storage, 35 ... Chemical liquid return passage.

Claims (5)

[Claims] 1. In a seaweed aquaculture work vessel for guiding the seaweed net from the bow side to an acid treatment tank above the bridge for acid treatment of the seaweed net, the acid treatment tank is formed before and after the bridge. A chemical reservoir for storing the chemical solution for acid treatment to be supplied to the tank is arranged in front of the bridge and below the acid treatment tank, and behind the bridge, the chemical solution recovered from the acid treatment tank is temporarily stored. Further, a vessel for seaweed aquaculture work, characterized in that a vessel for receiving a chemical solution for returning to the aforementioned chemical solution store is arranged. 2. The seaweed farming work vessel according to claim 1, wherein a rear portion of the deck is inclined downward to the front, and a passage for returning the chemical liquid from the chemical liquid storage to the chemical liquid storage is provided along the lower surface of the front lowering portion of the deck. A seaweed aquaculture work boat characterized by being formed in combination. 3. The seaweed aquaculture work vessel according to claim 1, wherein a passage for flowing the chemical liquid from the acid treatment tank to the chemical liquid storage tank is arranged at two places, right and left. 4. The nori culture work vessel according to claim 1, wherein a passage for supplying a chemical solution to the acid treatment tank is integrally provided on a side wall portion of the acid treatment tank. 5. The seaweed aquaculture work vessel according to claim 1, wherein the lower surface of the portion of the acid treatment tank located on the front side of the bridge is positioned lower than the front upper edge of the bridge. Work vessel.