JPH08276893A - Acid treatment for ship for laver cultivating work - Google Patents

Abstract

PURPOSE: To carry out acid treatment suitable for laver by providing a guide member on a ship along the longitudinal direction of a hull so as to pass a laver net from the sea along the guide member, by gathering lever stuck to the net, and by jetting chemicals widthtwise almost uniformly in an acid treatment tank. CONSTITUTION: During a laver gathering work in a culture bed, a guide extension 49 is projected forward from the bow of a ship which are advanced at a low speed. In this phase, thrustors 61 to 63 provided in the bow, the stern and the part therebetween are suitably operated so as to adjust the advancing direction of the ship. As the ship is advanced, a lever net is scooped up from the sea surface 90, is moved to the stern along a net guide 4. During the movement of the net, a laver pick-up device picks up laver sticking to the net. When the net from which lever has been picked up passes through an acid treatment tank 70 on a bridge 3, chemicals having been force-fed through a circulating pipe 81 by a force feed pump 82 and jetted downstream upward from jet ports is jetted to blow the net, which is therefore subjected to uniform acid treatment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acid treatment device for a seaweed work vessel for collecting seaweed cultivated by seaweed nets on the sea.

[0002]

2. Description of the Related Art Conventionally, as this type of work boat for seaweed cultivation, a guide for seaweed net is attached to the upper part of the hull, and the front end of this guide is projected forward from the bow and the front end is submerged under the sea surface. It is known that by advancing toward the seaweed net in this state, the seaweed net is guided onto the ship and the seaweed is continuously collected on the ship. That is, the seaweed cultivation work boat is provided with a seaweed net guide on its hull, and this guide extends to the stern side directly above the seaweed reaper at the front of the ship and above the bridge. An acid treatment tank is provided along the mesh guide. Then, by moving the ship forward, while scooping up the seaweed net and moving it in the stern direction along the seaweed guide, the seaweed cutting device cuts off the seaweed attached to the seaweed net and then passes through the acid treatment tank. By so doing, the seaweed net is immersed in the acid treatment chemical solution for acid treatment. At the upstream end of the acid treatment tank, the chemical solution for acid treatment in the chemical solution tank is supplied to the upstream end of the acid treatment tank by a pump, and the chemical solution is recovered from the downstream end of the acid treatment tank to the chemical solution tank. .

[0003]

In the above-mentioned configuration, the chemical solution is adhered to the nori net by passing the nori net over the surface of the chemical solution stored in the acid treatment tank to carry out the acid treatment. Since the net passes over the acid treatment tank while being pulled from both sides in the width direction by the locking rope, the seaweed net may not be sufficiently immersed in the acid treatment tank depending on the tension of the locking rope. It will be. Therefore, there is a problem that the chemical solution is not sufficiently attached to the seaweed net and the acid treatment tends to be insufficient.

The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and is a ship for seaweed work in which the chemical solution is sufficiently adhered to the seaweed net so that good acid treatment can be performed. It is an object of the present invention to provide an acid treatment device.

[0005]

According to a first aspect of the present invention, a guide member extending in the length direction of the hull from the bow end to the stern end is provided on the ship, and the seaweed net along the guide member is provided along the guide member. In the ship for seaweed cultivation work in which the seaweed adhering to the seaweed net is cut off on the ship, an acid treatment tank for acidizing the seaweed net is formed along the guide member. A cleaning surface is formed on the upper surface of the acid treatment tank through which the seaweed net passes in close proximity, and the upstream end of this cleaning surface is connected to a supply path and a transfer pump for supplying the chemical solution, and the chemical solution is placed on the cleaning surface. A jet outlet that jets out substantially uniformly in the width direction is formed, and a discharge path for discharging the chemical solution from the acid treatment tank is connected to the downstream end of this cleaning surface.

According to the second aspect of the present invention, grooves are formed on both sides of the cleaning surface to allow the chemical solution to flow to the downstream end of the acid treatment tank.

In the third aspect of the invention, the height of the peripheral portion outside the groove is substantially the same as or lower than the height of the cleaning surface.

According to a fourth aspect of the present invention, the upper surface of the acid treatment tank is formed to be higher toward the center in the width direction so that the seaweed net entirely contacts the cleaning surface. .

According to a fifth aspect of the present invention, the ejection port is configured to eject the chemical solution toward the seaweed net.

[0010]

In the structure of claim 1, a cleaning surface is formed on the upper surface of the acid treatment tank, through which the seaweed net passes in close proximity, and the chemical liquid is made substantially uniform in the width direction on the upstream surface of the cleaning surface. Since the jetting outlet is formed, it moves on the cleaning surface in the vicinity of that surface, and the chemical liquid remains attached to the cleaning surface and moves to the downstream side. Acid treatment will be performed.

According to the second aspect of the present invention, the chemical liquid overflowing from the cleaning surface can be reliably collected at the downstream end of the acid treatment tank through the grooves formed on both sides thereof.

According to the third aspect of the present invention, even when the nori net is pulled from both sides by the locking rope, the nori net is pressed against the washing surface, and the nori net is favorably acid-treated.

According to the fourth aspect of the present invention, since the laver net is in contact with the cleaning surface over the entire surface, the chemical solution is more reliably attached to the laver net.

According to the fifth aspect of the invention, since the chemical solution is ejected from the ejection port toward the seaweed net,
The chemical solution is more reliably sprayed onto the seaweed net.

[0015]

[Example] In FIGS. 2 and 3, a seaweed cultivation work boat 1
Is equipped with a bridge 3 at the rear of its hull 2, and an engine 10 is installed below the bridge 3, and a propeller 1 rotatably driven by the engine 10 via a propeller shaft 110.
1 is arranged on the bottom of the stern, and a rudder blade 12 is arranged on the rear side thereof. The propeller shaft 110 is rotatably held by a holding bracket 112. A stern bracket 60 is attached to the rear surface of the stern plate 17 at the stern end, and this stern bracket 60 is provided with a stern thruster 62 for generating thrust in the width direction of the stern. A bow thruster 61 is provided on the bottom of the bow, and an intermediate thruster 63 is also provided on the front side of the holding bracket 112 on the bottom of the stern.

A nori net guide 4 is provided on the hull 2, and a guide extension 49 is provided at the front end of the nori net guide 4. The guide extension portion 49 is configured such that a connecting portion 48 provided at a base end portion of the guide extension portion 49 can move along a guide member 47 extending in the front-rear direction of the hull. Four
The tip portion of 9 is so formed as to sink under the water surface 90 in front of the bow. This seaweed net guide 4 extends from the bow end to the rear of the stern end along both sides of the ship, is supported by struts 43 on both sides of the ship, and gradually rises from the bow end to the vicinity of the bridge 3, Behind the bridge 3, it gradually descends and extends to the rear of the stern end.

A seaweed reaping device 41 is arranged near the bow below the seaweed net guide 4 and the bridge 3
An acid treatment tank 70 is provided on the top, and the acid treatment tank 70 extends to the stern end along the seaweed net guide 4. The main chemical liquid tank 7 is installed on the rear surface of the stern plate 17 below the acid treatment tank 70 at the stern end, and a recovery pipe (flow path) for collecting the chemical liquid from the downstream end of the acid treatment tank 70 to the main chemical liquid tank 7. 71
Has been led. Further, a circulation pipe (flow path) 81 for circulating the chemical liquid is led out from the main chemical liquid tank 7, and the circulation pipe 8
A transfer pump 82 is provided in the middle of 1, and the circulation pipe 8
The tip of the No. 1 is connected to the upstream end of the acid treatment tank 70.
An auxiliary chemical liquid tank 8 is installed in the bow of the bow, and a chemical liquid supply pipe 86 is led out from the auxiliary chemical liquid tank 8 and its end is connected to the chemical liquid supply pipe 83 via a transfer pump 85 and a three-way switching valve 84. The end portion of the chemical liquid supply pipe 83 is connected to the main chemical liquid tank 7. A branch pipe 87 is connected to the three-way switching valve 84, and the other end of the branch pipe 87 is opened below the bottom of the ship (the bottom opening 88). Therefore, by switching the three-way switching valve 84, the auxiliary chemical liquid tank 8 communicates with either the main chemical liquid tank 7 or the ship bottom opening 88.

On the bow side from the center of the hull, a seaweed storage 9 for storing the seaweed cut by the seaweed cutting device 41 is installed. The top of the seaweed storage 9 extends from the bottom of the ship to the central deck 9
A bow deck 91 is provided on the front side of the central portion deck 92, penetrating 2 and protruding upward. And between this seaweed warehouse 9 and the bulwarks 14 on both sides, the central deck 9
A passage 920 consisting of two is formed, and a seaweed introducing port 93 is formed in this passage 920, and this seaweed introducing port 93 communicates with a seaweed supply port 930 that opens to the side of the seaweed storage 9. Further, a dam plate 94 for damming the passage 920 is provided on the stern side of the seaweed introducing port 93. The bow deck 91 and the central deck 92 are formed so as to be gradually higher toward the bow side, and the seaweed inlet 93 is formed at the lowest position on the deck surface in front of the dam plate 94.

The acid treatment tank 70 is constructed as shown in FIGS. That is, the acid treatment tank 70 is formed with a cleaning surface 72 through which the seaweed net passes in close proximity to the upper surface thereof, and the chemical solution is provided between both sides of the cleaning surface 72 and the peripheral walls 79 at the downstream end of the acid treatment tank 70. A side groove 76 is formed at the upstream end, a communication groove 75 that connects the both side grooves 76 to each other is formed at the upstream end, and a merging portion 77 at which the both side grooves 76 merge is formed at the downstream end. Is connected to the recovery pipe 71. A circulation pipe (supply path) 81 for supplying a chemical solution is connected to the upstream end of the cleaning surface 72, a space 73 elongated in the width direction is formed in this connection portion, and the cleaning surface 72 is provided on the downstream wall thereof. A jet port (slit) 74 for jetting the chemical liquid substantially uniformly in the width direction is formed on the upper side. The cleaning surface 72 is formed so as to be curved so that the height becomes higher toward the central portion in the width direction, and is slightly lower than the upper surface of the peripheral wall 79 around the cleaning surface 72.

On the contrary, as shown in FIG. 5, the upper surface of the peripheral wall 79 is formed slightly lower than the cleaning surface 72,
Even when the seaweed net 101 is pulled from both sides by the locking ropes 102, the seaweed net 101 may be pressed against the cleaning surface 72 so as to come into full contact with the cleaning surface 72.

6 to 8 show another example of the acid treatment tank, and the cleaning surface is an upstream cleaning surface 721, a central cleaning surface 722,
It is composed of three regions including the downstream cleaning surface 723, and the central cleaning surface 722 is formed higher than the upstream and downstream cleaning surfaces 721 and 723. On the upstream cleaning surface 721, a large number of ejection openings 78 are formed in a substantially uniform arrangement in the width direction, and an elongated chemical liquid passage 780 extending in the width direction is formed below these ejection openings 78. The cleaning chemical is ejected upward from here through the ejection port 84. Further, in the same way as above, the side groove 7 is formed around these cleaning surfaces.
6, the communication groove 75 and the merging portion 77 are formed, and the merging portion 7
A recovery pipe 71 is connected to 7.

FIG. 9 shows the structure of the intermediate thruster 63. A recess 22 is formed in the bottom plate 21 of the hull 2, and a cylindrical body 640 is attached in the ship width direction with the upper half inserted into the recess 22. The propeller 64 is arranged therein, and a motor 66 for rotating the propeller 64 forward and backward is arranged in the ship. In this way, the cylindrical body 640 is inserted into the recess 2
It is attached in a state of being inserted in the No. 2 in order to reduce the amount of protrusion from the bottom of the ship and avoid interference with the propeller shaft 110.

In the above structure, the guide extension portion 40 is positioned on the boat as shown in the figure during normal traveling, and the boat is allowed to travel forward in this state. During the seaweed mowing work at the farm, the guide extension 40 is projected forward of the bow to immerse the tip under the sea surface 90, and the ship is advanced at a slow speed toward the seaweed net on the sea surface 90. At this time, any one of the bow thruster 61, the stern thruster 62, and the intermediate thruster 63 is operated to adjust the course of the ship. As the hull 2 advances, the seaweed net on the sea surface 90 is picked up by the guide extension portion 40 and moved on the ship along the seaweed net guide 4 in the stern direction. In the meantime, the seaweed adhering to the seaweed net is cut off by the seaweed cutting device 41 and dropped into the seaweed storage 9 below. Part of the seaweed that adheres to the seaweed net is the bow deck 91
Although the seaweed drops to the top, the seaweed that has fallen is flown into the passage 920 of the central deck 92 and supplied to the seaweed storage 9 through the seaweed inlet 93.

The seaweed net from which the seaweed has been cut is acid-treated by passing through the acid-treating tank 70 on the bridge 3, and is returned to the sea surface 90 behind the stern through the seaweed net guide 4. In this acid treatment, in the configuration shown in FIG. 3 and FIG. 4, the chemical liquid pressure-fed by the transfer pump 82 through the circulation pipe 81 is jetted downward and upward from the jet port 74 and sprayed onto the nori net. The seaweed net sprayed with this chemical moves on the cleaning surface 72 close to the surface, and the seaweed net flows over the top surface of the cleaning surface 72 in the downstream direction. It moves along the cleaning surface 72 in a contact state. That is, the seaweed net that moves along the cleaning surface 72 is always kept in a state in which a sufficient amount of chemical liquid is attached. The chemical liquid on the cleaning surface 72 flows into the side grooves 76 and the merging portion 77 on both sides, and is collected in the main chemical liquid tank 7 from the recovery pipe 71.

Further, in the configuration of FIGS. 6 to 8, the transfer pump 8
The chemical liquid pressure-fed by 1 is jetted upward from a large number of jet outlets 84 and is sprayed onto the laver net passing on the upstream side washing surface 721, and the laver net sprayed with the chemical solution is then on the central portion washing surface 722. Is moved to the downstream side together with the chemical liquid flowing on the surface, and then is sent to the downstream side through the downstream cleaning surface 723.

As described above, the nori net is washed with the cleaning surfaces 72, 72.
When it is moved close to 2,723, the chemical sprayed on the seaweed net flows on the washing surface, and the seaweed net moves while always in contact with this flow. The chemical solution will adhere. In particular, the spout 84
When the drug solution is jetted upward from the nozzle, all the jetted drug solution is sprayed on the laver net, so that the drug solution is reliably supplied to the laver net. Further, as shown in FIG. 5, the upper surface of the peripheral wall 79 is formed slightly lower than the cleaning surface 72, and the seaweed net 101 is pressed against the cleaning surface 72 even when the seaweed net 101 is pulled from both sides by the locking ropes 102. By doing so, the seaweed net always comes into contact with the cleaning surface 72 over the entire surface, so that the chemical solution is reliably supplied to the seaweed net.

During the above acid treatment, the chemical liquid in the main chemical liquid tank 7 is constantly supplied to the upstream side of the acid treatment tank 70 by the transfer pump 82 through the circulation pipe 81, and the acid treatment tank 70 is supplied from the downstream end thereof. The chemical liquid is collected in the main chemical liquid tank 7 through the recovery pipe 71. Thus, the chemical solution in the acid treatment tank 70 is circulated and used, but the chemical solution is gradually consumed and diluted by the seawater carried by the seaweed net. Therefore, the transfer pump 85 is operated to supply the chemical liquid in the auxiliary chemical liquid tank 8 to the main chemical liquid tank 7 through the supply pipes 86 and 83. As the chemical solution at this time, a concentrated stock solution may be used, or a chemical solution diluted to a predetermined concentration may be used.

To dilute the chemical liquid in the auxiliary chemical liquid tank 88, for example, a predetermined amount of undiluted stock liquid is stored in the auxiliary chemical liquid tank 8 and the three-way switching valve 84 is operated to branch the pipe 8.
7 may be communicated with the auxiliary chemical liquid tank 8, and the transfer pump 85 may take in and dilute seawater from the opening 88. Further, the auxiliary chemical liquid tank 8 is filled with only seawater as ballast, whereby the auxiliary chemical liquid tank 8 is
It can also be used as a tank for trim adjustment.

[0029]

According to the first aspect of the present invention, a cleaning surface is formed on the upper surface of the acid treatment tank through which the seaweed net passes in close proximity. Since the jet outlets that eject uniformly are formed, by moving on the cleaning surface in the vicinity of that surface, the state in which the chemical solution is adhered is maintained and it moves to the downstream side. Will have a good acid treatment.

According to the second aspect, the chemical liquid overflowing from the cleaning surface can be reliably collected at the downstream end of the acid treatment tank through the grooves formed on both sides of the chemical liquid.

According to the third aspect of the invention, even when the nori net is pulled from both sides by the locking rope, the nori net is pressed against the cleaning surface, and the nori net is favorably acid-treated.

According to the fourth aspect of the present invention, since the nori net is entirely in contact with the cleaning surface, the chemical solution is more reliably attached to the nori net.

According to the fifth aspect of the invention, since the chemical solution is ejected from the ejection port toward the seaweed net,
The chemical solution is more reliably sprayed onto the seaweed net.

[Brief description of drawings]

FIG. 1 is a perspective view of an acid treatment tank.

FIG. 2 is a side view of a ship showing an embodiment of the present invention.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a partial cross-sectional view of FIG.

FIG. 5 is a cross-sectional explanatory view showing another example of the cleaning surface of the acid treatment tank.

FIG. 6 is a plan view showing another example of the acid treatment tank.

FIG. 7 is a sectional view taken along line AA of FIG. 6;

8 is a cross-sectional view taken along the line BB of FIG.

9 is a cross-sectional view of the intermediate thruster of FIG.

[Explanation of symbols]

 1 Nori cultivation work boat 2 Hull 3 Bridge 4 Guide for nori net 7 Main chemical liquid tank 8 Auxiliary chemical liquid tank 9 Nori warehouse 10 Engine 11 Propeller 41 Nori cutting device 49 Guide extension 70 Acid treatment tank 71 Recovery pipe 72, 722, 723 Cleaning surface 74,84 Chemical liquid jet 81 Circulation pipe 82 Transfer pump

Claims (5)

[Claims] 1. A guide member is provided on the ship, the guide member extending in the length direction of the hull from the bow end to the stern end, and allows the sea nori net to pass along the guide member over the ship while the nori net is interposed therebetween. In a seaweed aquaculture work ship where the seaweed adhered to the seaweed is cut off on a ship, an acid treatment tank for acidizing the seaweed net is formed along the guide member, and the seaweed net is close to the upper surface of the acid treatment tank. A cleaning surface that passes through is formed.The upstream end of this cleaning surface is connected to a supply path for supplying a chemical solution and a transfer pump, and a jet port that sprays the chemical solution almost uniformly in the width direction is formed on the cleaning surface. An acid treatment device for a seaweed work vessel, characterized in that a discharge passage for discharging the chemical solution from the acid treatment tank is connected to the downstream end of the cleaning surface. 2. The acid treatment device for a seaweed work vessel according to claim 1, wherein grooves are formed on both sides of the cleaning surface to allow the chemical solution to flow to the downstream end of the acid treatment tank. 3. The acid treatment device for a seaweed work vessel according to claim 2, wherein the height of the peripheral portion outside the groove is substantially the same as or lower than the height of the cleaning surface. 4. The upper surface of the acid treatment tank is formed so as to be higher toward the center in the width direction so that the seaweed net is entirely in contact with the cleaning surface. An acid treatment device for the seaweed vessel described. 5. The spout is configured to spout the chemical solution toward the seaweed net.
An acid treatment device for the seaweed vessel described.