JP2018038332A - Method and apparatus for cleaning fish reef - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently exterminate and clean marine life deposited in a fish reef without diving in the seabed and performing a lot of work.SOLUTION: An apparatus 20 for cleaning a fish reef includes a box 21 with a lower part opened and a whole circumference of sides and an upper part being closed. The apparatus is hung and supported and is installed so as to cover the fish reef 1 where the box 21 is installed in the seabed. Then, an environment in this box is brought into a state of killing the marine life deposited on the surface of the fish reef 1. For example, a high temperature vapor is supplied from a vapor supply pipe 14 and the inside of the box is made a high temperature. Also, extermination means for killing the marine life deposited on the surface of the fish reef 1 is included to thereby exterminate the marine life efficiently. The extermination means can adopt a heating device 26 for bringing the box into a high temperature state, a device 36 for performing electromagnetic heating, and means 44 for supplying a medicinal solution, etc.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a method for cleaning the surface of a fishing reef installed on the seabed and a fishing reef cleaning device in order to promote the propagation and growth of fish and marine organisms.

  In order to promote the growth and growth of fish, shellfish, crustaceans, cephalopods, etc., fishing reefs are submerged on the seabed. Such fishing reefs may be installed for specific marine life. For example, the fishing reef described in Patent Document 1 is made of concrete, and is mainly installed for the purpose of breeding shellfish such as abalone and turban shell. Similarly, there are fishing reefs made of concrete that are installed to provide a place for spawning squid.

  In such fishing reefs, when installed for a long time after being installed on the seabed, unintended marine organisms such as barnacles and squirts may adhere to the surface, and the function for breeding the target marine organisms may be lost. . In such a state, in order to restore the function, it is desired to remove the non-target organisms on the surface of the fishing reef and clean it immediately after installation.

  As a method for cleaning the surface of a fishing reef, a method in which a submerged worker approaches a fishing reef installed on the seabed and peels and removes marine organisms on the surface using a grasped tool or the like. In addition, a method is conceivable in which a fishing reef installed on the seabed is once lifted on the sea surface, and surface marine organisms are peeled off on a ship or on land, and then returned to the seabed.

JP 2005-348659 A

  However, the work of a submerged worker cleaning the surface of the fishing reef on the seabed requires a lot of labor and is inefficient. That is, in the sea, it is difficult for an operator to maintain his / her body in a stable state, and it is difficult to remove an organism that is strongly attached to a fishing reef. Moreover, in the method of lifting the fishing reef on the sea surface and cleaning it, returning it to the seabed requires work for lifting and re-installing on the seabed, which increases the cost.

  The present invention has been made in view of the circumstances as described above, and an object of the present invention is to provide a method for cleaning a fish reef that can efficiently remove marine organisms attached to a fish reef installed on the seabed at a low cost. And providing a reef cleaning device.

  In order to solve the above-mentioned problem, the invention according to claim 1 is configured to cover a box whose bottom is opened and whose entire side and top are closed so as to cover the fishing reef installed on the seabed from above. Provided is a method for cleaning a fishing reef that makes the environment inside the box capable of killing marine life attached to the surface of the fishing reef.

In the above invention, the state in which the environment in the box can exterminate marine organisms adhering to the surface of the fishing reef is, for example, the following state.
(1) Pressurize air to lower the sea level in the box, and keep the portion to be cleaned exposed on the sea level in the box for a predetermined period. Expose living creatures in the sea by exposing to the air.
(2) Pressurize the air to lower the sea level in the box, leave the part to be cleaned exposed on the sea level in the box, and then inject high-temperature and high-pressure steam into the box to reach a predetermined temperature. Hold for hours. It is intended to eliminate marine organisms attached to fishing reefs by increasing the temperature.
(3) Air is injected and sprayed with a repellent with the fishing reef exposed on the sea level in the box. As the chemical, an acidic solution, an alkaline solution, or the like can be used.
(4) In the state where the fishing reef is below the sea level in the box, a chemical for extermination is added to the sea water in the box. A chemical is added to the seawater within the range isolated by the box to eliminate marine organisms attached to the fishing reef. When there is a possibility that the surrounding environment may be affected by the medicine, the influence on the surrounding environment can be avoided by sucking and discharging the seawater in the box after the extermination and performing the treatment.
(5) With air being injected and the fishing reef exposed on the seawater surface in the box, it is heated by a heater installed in the box and held at a predetermined temperature for a predetermined time. As the heater, for example, a halogen heater lamp, an infrared lamp, or the like can be used. (6) Injecting air into the box and exposing the reef on the sea surface, irradiate the surface of the reef with an electromagnetic wave generator installed in the box. Heats the water of marine life. For example, a microwave of 2450 MHz is generated in the box and heated by acting on water molecules contained in marine organisms.
(7) With the air being injected and the fishing reef exposed on the seawater surface in the box, the seawater in the box is electrolyzed to generate chlorine gas in the box. Marine organisms exposed to the air are exterminated by chlorine gas.
(8) The seawater in the box is electrolyzed while the reef is below the sea level in the box to produce sodium hypochlorite in the box. When seawater is electrolyzed, chlorine is generated at the anode, hydrogen is generated at the cathode, and sodium hydroxide is generated. These react to generate sodium hypochlorite. In this way, marine organisms are controlled by the sodium hypochlorite contained in the seawater that immerses the reef in the box.

  In this fishing reef cleaning method, the box can be installed so as to cover the side and upper side of the fishing reef installed on the sea bottom by suspending and supporting the box from the sea surface and lowering it to the sea bottom. As a result, the limited area of the box, that is, the periphery of the reef is isolated from the surrounding seawater. Therefore, it is possible to adjust the environment limited to the inside of the box to a state in which marine organisms are exterminated, and to efficiently eliminate marine organisms attached to the fishing reef. In addition, the environment inside the box can be adjusted from the surface of the sea, and the marine organisms attached to the reef can be removed without diving work or by reducing diving work as much as possible. It becomes possible to do.

  The invention according to claim 2 is a box that is open at the bottom and can cover the entire circumference and the upper side of the fishing reef installed on the seabed, and a hanger for lifting or hanging the box from the sea surface. And a vent pipe for injecting gas into or discharging from the inside of the box installed on the bottom of the sea or supported by the bottom of the box. There is provided a fishing reef cleaning device having fishing reef position detecting means for detecting the position of the reef in a state of being supported above the fishing reef supported by the box and suspended above the fishing reef installed on the seabed.

  In this fishing reef cleaning device, it is suspended and supported from above the sea surface, and it is installed so that the box covers the reef installed on the sea floor by detecting from the sea surface while detecting the position of the reef by the reef position detecting means. can do. And a box is installed so that a sea reef may be covered, the box is isolated from the surrounding seawater, and gas, such as air and high temperature steam, can be introduced or discharged using a vent pipe. As a result, the environment inside the box installed on the sea floor from the sea surface can be adjusted, and marine organisms attached to the fishing reef can be eliminated while affecting the surrounding environment. It becomes possible to make the environment.

  The invention according to claim 3 is the fishing reef cleaning device according to claim 2, wherein the box is installed so as to cover the entire circumference and the upper side of the reef, and is exposed on the sea surface of the box. It has control means for killing marine organisms adhering to the surface of the fishing reef, or marine organisms adhering to the surface of the fishing reef under the sea level in the box.

  In this fishing reef cleaning device, marine organisms can be killed at an early stage by the extermination means, and marine organisms attached to the fishing reef can be efficiently eliminated.

  The invention according to claim 4 is the fishing reef cleaning device according to claim 2 or claim 3, wherein the liquid, the gas, or the mixture of the liquid and the gas is injected into the box, or the liquid, the gas, and the liquid It is assumed that a particulate solid is added to one of a mixture of water and gas and sprayed to remove marine organisms killed on the surface of the fishing reef.

  Marine organisms that have been killed while attached to a reef have less adhesion than when they are alive, and the removal means of this reef cleaning device is liquid, gas, or a mixture of liquid and gas, or a granular form of these. By adding and injecting solids, marine organisms that have been killed while adhering to the surface of the reef can be efficiently removed.

  As described above, in the method for cleaning a reef of the present invention, marine organisms attached to the reef can be efficiently removed without diving into the seabed and performing many operations. In the fishing reef cleaning apparatus of the present invention, the fishing reef installed on the seabed is covered with a box, and marine organisms attached to the fishing reef can be efficiently removed at a low cost.

It is the schematic side view and schematic plan view which show the example of the fishing reef which can apply the cleaning method of the fishing reef which concerns on this invention. It is sectional drawing which shows the outline of the cleaning method of the fish reef which concerns on this invention. It is one Embodiment of the cleaning method of the fishing reef which concerns on this invention, Comprising: It is a schematic sectional drawing which shows the state which uses the fishing reef cleaning apparatus which is one Embodiment of this invention, and removes the marine organisms adhering to fishing reef. It is a schematic sectional drawing which shows the state which exterminates the marine life adhering to fishing reef using other embodiment of the fishing reef cleaning apparatus which concerns on this invention. It is a schematic sectional drawing which shows the state which exterminates the marine life adhering to fishing reef using other embodiment of the fishing reef cleaning apparatus which concerns on this invention. It is a schematic sectional drawing which shows the state which exterminates the marine life adhering to fishing reef using other embodiment of the fishing reef cleaning apparatus which concerns on this invention. It is a schematic sectional drawing which shows the state which exterminates the marine life adhering to fishing reef using other embodiment of the fishing reef cleaning apparatus which concerns on this invention. It is a schematic sectional drawing which shows the state which exterminates the marine life adhering to fishing reef using other embodiment of the fishing reef cleaning apparatus which concerns on this invention. It is a schematic sectional drawing which shows the state which exterminates the marine life adhering to fishing reef using other embodiment of the fishing reef cleaning apparatus which concerns on this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic side view and a schematic plan view showing a state where a fishing reef that can be cleaned by the method for cleaning a fishing reef according to the present invention is installed on the seabed.
As shown in FIG. 1 (a), the reef 1 is installed by stacking a plurality of reef blocks 2 each having a plate-like portion 2a and legs 2b formed of reinforced concrete.

The plate-like portion 2a of the fishing reef block 2 has a substantially rectangular planar shape and is supported substantially horizontally by the leg portion 2b. The leg 2b is provided so as to protrude downward from the four corners of the plate-like part 2a. And the notch 2c is provided in the upper part of the part in which the leg part 2b is provided, and the lower end of the leg part 2b with which the other fishing reef block 2 of the same shape is fitted can be fitted. Thus, reef blocks _2-2 of one or more of the same shape on one of the reef block 2 _-1 installed in seabed, a 2 _-3, can be stacked in a stable state. Note that the upper layer of the reef blocks _2-2 and lower reef block 2 _-1 stacked, ligated with previously implanted in that anchor bolt (not shown) or the like, the upper layer for reef by waves and tidal current the the block _2-2 and lower reef block 2 _-1 to prevent the separation is desirable.

  In the method for cleaning a reef according to the present invention, as shown in FIG. 2, the reef cleaning device 10 including a box 11 having an open bottom from the top of the reef 1 already installed on the seabed is lowered, The side and upper side are installed so as to be covered with the box 11. Then, the fishing reef 1 is isolated from the surrounding marine environment so that the marine organisms attached to the reef 1 in the box 11 cannot be grown and removed.

FIG. 3 is a schematic cross-sectional view showing a state where the surface of the reef is cleaned using the reef cleaning device according to one embodiment of the present invention.
This fishing reef cleaning device 10 is a hollow, substantially rectangular parallelepiped formed of reinforced concrete and has a box 11 that is open at the bottom, a suspension 12 for suspending and supporting the box 11, and supplying air to the box Alternatively, a vent pipe 13 that can discharge from the box, a steam supply pipe 14 that supplies high-temperature and high-pressure steam from above the sea surface to the box, a lower monitoring camera 15 that is attached to the box and photographs the lower side, It has.

  The box 11 can completely cover the side and upper side of the fishing reef 1 whose inner dimensions are installed on the seabed. And even when the inside of the box 11 is occupied by air or other gas, it has a mass that does not lift due to buoyancy. Moreover, it has the intensity | strength which can bear the difference of the internal pressure when the inner side of the box 11 is satisfy | filled with gas, and the water pressure which acts from the outer side.

A plurality of the suspension hands 12 are provided, and the tip portion is embedded in the concrete in the upper part of the box, and the annular portion protrudes upward. The suspension member 5 can be locked to the annular portion via a suspension frame 4 wound up by the lifting machine 3.
The vent pipe 13 is provided with a connector 13b for connecting a hose 16 which is embedded in a pipe member 13a so as to penetrate through the concrete in the upper part of the box and continues to the sea surface. The hose 16 is connected to a device (not shown) that can supply high-pressure air such as a compressor installed on the sea surface.

The steam supply pipe 14 has a connector 14b to which a hose 17 and a pipe member 14a penetrating the concrete at the upper part of the box are connected in the same manner as the vent pipe 13. The hose 17 is provided on the sea surface and has a high pressure. It is connected to a boiler (not shown) for supplying steam.
The steam supply pipe 14 may also be used as the ventilation pipe 13 without being provided, and the connection destination of the hose 16 may be switched to either a compressor or a boiler on the sea surface.

The lower monitoring camera 15 can take a picture of a lower state in seawater and can immediately display the taken image on a monitor (not shown) provided on the sea surface, and functions as a reef position detection unit. To do. With this downward monitoring camera 15, when the box 11 is suspended and supported and lowered toward the seabed, the position of the fishing reef 1 installed on the seabed can be confirmed.
These lower monitoring cameras 15 are attached to the outer side surface of the box 11 to photograph the lower side, and the box 11 that is attached to the upper surface on the inner side of the box 11 and is supported by suspension. An internal camera 15b for photographing is provided.

A method of cleaning a reef that has already been installed using such a reef cleaning device 10 can be implemented in the following steps.
The reef cleaning device 10 is transported on the sea surface where the reef is installed by a trolley or the like, and is lifted by the lifting machine 3 and lowered into the seawater as shown in FIG. At this time, the lower monitoring camera 15 captures the lower state and confirms the position of the fishing reef 1. And the position of the fishing reef cleaning apparatus 10 suspended and supported by the operation of the lifting machine 3 is adjusted to the position immediately above the position where the fishing reef 1 is installed. Further, when the planar shape of the reef 1 is rectangular as shown in FIG. 1 and the box 11 is manufactured in accordance with this, the direction of the box is adjusted by the direction adjusting device 7 attached to the suspension frame 4. The box 11 can be installed so as to be adjusted and covered from above the reef 1.
As the direction adjusting device 7, for example, a device that injects compressed air in the horizontal direction and slowly rotates the box 11 around the hoisting material 6 for winding can be adopted.

  As shown in FIG. 3, when the box 11 of the fish reef cleaning device 10 is installed so as to cover the fish reef 1, the position of the seawater surface in the box 11 is determined by press-fitting compressed air from the vent pipe 13. Lower to near the lower end of When the box 11 with the lower part opened is lifted on the sea surface and lowered, air is taken into the box, but as the box is lowered, the volume decreases due to water pressure and it is installed to cover the fishing reef Sometimes the reef is partially immersed in seawater. From such a state, compressed air is injected through the vent pipe 13, and a portion of the fishing reef 1 to be cleaned is exposed on the sea water surface in the box 11, that is, in the air.

Subsequently, high-temperature and high-pressure steam is fed into the box 11 from the steam supply pipe 14. Although the steam is cooled and liquefied in the box 11, the temperature in the box 11 gradually rises to a temperature at which marine organisms such as sea squirts and barnacles attached to the surface of the fishing reef 1 are killed. In this way, the high temperature state is maintained for a predetermined time, and marine organisms attached to the surface of the reef 1 are killed.
In order to prevent the pressure in the box 11 from rising due to the injection of air or the supply of high-temperature and high-pressure steam into the box, gas leaks out through the bottom of the box 11 and is prevented from flowing through the box from the bottom. It is desirable to provide the pressure release hole 18 at a height position. Thereby, it can prevent that the box which leaks so that the gas in a box may pass through the lower end of box 11 may become unstable.

After the inside of the box 11 is maintained at a high temperature and marine organisms adhering to the fishing reef are killed, the supply of steam is stopped and the box 11 is pulled up to the sea level while adjusting the amount of air in the box. The marine organisms that have been killed while attached to the reef 1 are peeled off from the surface of the reef as time passes and the cleaning of the reef 1 is completed.
In the fishing reef cleaning device 10, the ventilation pipe 13 and the steam supply pipe 14 are separately provided. However, when the ventilation pipe 13 is also used as the steam supply pipe, the box is formed by press-fitting air from the ventilation pipe 13. After adjusting the height of the seawater surface, the valve (not shown) provided in the air passage from the compressor is closed, and the valve (not shown) provided in the steam supply passage from the boiler is opened. Can be in a high temperature state.
Also, without supplying high-temperature and high-pressure steam, the reefs may be left in the air until the attached marine organisms die, but for efficient cleaning, supply of steam is recommended. It is desirable to carry out or use the disinfecting means described below.

FIG. 4: is a schematic sectional drawing which shows the state which cleans a fishing reef using the fishing reef cleaning apparatus which is the 2nd Embodiment of this invention, and this cleaning apparatus.
The fish reef cleaning device 20 includes a box 21 similar to the device 10 shown in FIG. 3, a suspender 22, a vent pipe 23, and a downward monitoring camera 25, and in addition to these, an upper portion in the box. Is provided with a heating device 26. The heating device 26 functions as a disinfecting means, and no steam supply pipe is provided in the present embodiment.

  As the heating device 26, for example, a halogen heater lamp, an infrared lamp or the like can be used, and other heaters may be used. These heating devices 26 are desirably waterproofed so as not to lose their functions even when immersed in seawater. However, the heating device 26 is waterproofed by managing the box so that gas is always confined. It can also be used without processing.

  In such a fishing reef cleaning device 20, the fishing reef cleaning device 20 is suspended and supported from the sea surface, and the box 21 is installed so as to cover the reef 1, as in the case of using the device shown in FIG. 3. Then, air is press-fitted from the ventilation pipe 23 to lower the sea level in the box 21 to expose the fishing reef 1 in the air in the box. In this state, the heating device 26 is operated to heat the box 21. By raising the inside of the box 21 to a predetermined temperature, marine organisms attached to the surface of the fishing reef 1 can be controlled.

FIG. 5: is a schematic sectional drawing which shows the state which cleans a reef using the fishing reef cleaning apparatus which is the 3rd Embodiment of this invention, and this cleaning apparatus.
This fish reef cleaning device 30 has an electromagnetic heating device 36 instead of the heating device 26 of the device shown in FIG.
As the electromagnetic heating device 36, for example, a device that radiates microwaves toward the box can be used. A microwave having a frequency widely used in a microwave oven or the like can be used, and the object to be heated is heated by the energy of the changing radiation electrolysis becoming heat.
In this fishing reef cleaning device 30 as well as the device shown in FIG. 4, marine organisms attached to the surface of the fishing reef 1 are directly heated and efficiently removed while the reef 1 is exposed in the air inside the box 31. be able to.

FIG. 6: is a schematic sectional drawing which shows the state which cleans a fishing reef using the fishing reef cleaning apparatus which is the 4th Embodiment of this invention, and this cleaning apparatus.
The fish reef cleaning device 40 includes a box 41 similar to the device shown in FIG. 4 or 5, a suspension 42, a vent pipe 43, and a downward monitoring camera 45. A chemical solution can be supplied from the upper part of the body 41 into the box, and includes a chemical solution supply pipe 44 that functions as a removing means, and a drain pipe 46 that sucks and discharges the seawater in the box.
Similarly to the vent pipe 43, the chemical solution supply pipe 44 is provided so as to pass through the upper portion of the box 41 and open in the box, and a connector 44a for connecting to a hose 47 for feeding a chemical solution adjusted on the sea surface. It has. As the chemical solution supplied from the chemical solution supply pipe, an acidic solution, an alkaline solution, or the like can be used. For example, acetic acid, a sodium hydroxide aqueous solution, or the like can be used.
The drain pipe 46 is provided so as to open at the lower part in the box 41, and a connector 46 a for connecting to the suction hose 48 is provided outside the box 41. The suction hose 48 is connected to a suction pump (not shown) provided on the sea surface.

A fish reef can be cleaned as follows using such a fish reef cleaning apparatus.
The fish reef cleaning device 40 is suspended and supported by a lifting machine 3 as shown in FIG. 2 and lowered into the sea, and the box 41 is installed so as to cover the side and upper side of the reef 1 as shown in FIG. . Then, the amount of air trapped in the box 41 is adjusted via the vent pipe 43, and the sea level in the box is adjusted so that the fishing reef 1 is immersed in sea water in the box. In this state, the chemical solution is supplied from the chemical solution supply pipe 44 and mixed with the seawater in the box. By being immersed in seawater containing a chemical solution, marine organisms attached to the surface of the reef 1 are killed and exterminated.

After the fishing reef 1 is immersed in seawater containing chemicals in the box 41 and a predetermined time has elapsed, air is injected from the vent pipe 43 and seawater in the box is sucked through the drain pipe 46 to Drain up. The seawater containing the discharged chemical is neutralized. By collecting the seawater containing the chemical solution in this way, it is possible to suppress the chemical solution from affecting the surrounding marine environment.
After discharging seawater containing the chemical from the box 41, the fishing reef cleaning device 40 is lifted while adjusting the amount of air in the box to complete the cleaning of the fishing reef.

FIG. 7: is a schematic sectional drawing which shows the state which cleans a fishing reef using the fishing reef cleaning apparatus which is the 5th Embodiment of this invention, and this cleaning apparatus.
This fishing reef cleaning device 50 includes a box 51, a suspension hand 52, a vent pipe 53, a chemical solution supply pipe 54, and a downward monitoring camera 55 similar to the apparatus shown in FIG. In the device 50, a chemical liquid ejection pipe 56 is connected to the tip of the chemical liquid supply pipe 54 in the box. The medicinal solution ejection pipe 56 ejects medicinal solution toward the fishing reef 1 from a nozzle 56 a provided on the side of the fishing reef 1 in the box.
The nozzle 56a can be replaced with a nozzle that ejects from the side of the reef 1 or a nozzle that ejects a chemical from above in addition to a nozzle that ejects from the side.

In this fishing reef cleaning device 50, after the box 51 is installed so as to cover the reef 1, air is press-fitted through the ventilation pipe 53, and the reef 1 is exposed to the air in the box 51. Lower the sea level. And the chemical | medical solution supplied from the chemical | medical solution supply pipe | tube 54 is ejected from the nozzle 56a of the chemical | medical solution injection pipe 56, and is spread on the surface of the fishing reef 1. The marine organisms attached to the surface of the reef 1 are exterminated by the action of the chemical solution.
Thereafter, the reef cleaning device 50 may be pulled up to the sea surface while adjusting the amount of air in the box 51. However, a drainage pipe (not shown) similar to the device shown in FIG. After performing the extermination, the sea level in the box may be raised by adjusting the amount of air in the box 51, and the fishing reef 1 may be immersed in the sea water in the box. Then, after the chemical solution is washed out into seawater, the seawater in the box is sucked through the drainage pipe and drained to reduce the influence on the surrounding marine environment.

FIG. 8: is a schematic sectional drawing which shows the state which cleans a fishing reef using this fishing device and the fishing reef cleaning apparatus which is the 6th Embodiment of this invention.
This reef cleaning device 60 includes a box 61, a suspension hand 62, a vent pipe 63, and a downward monitoring camera 65 similar to the device shown in FIG. 4 or FIG. Are provided with two electrodes 64a and 64b.
The electrodes 64a and 64b are attached to the inside of the box 61 as shown in FIG. 8, and the two are in contact with seawater in the box 61 at positions where the two are separated from each other. A DC voltage is applied between the electrodes 64a and 64b from a power supply device on the sea surface via a conductive wire (not shown), and a potential difference is generated between the two electrodes 64a and 64b.

This fishing reef cleaning device 60 is suspended and supported by a lifting machine 3 as shown in FIG. 2, is lowered into the sea, and is installed so that the box 61 covers the side and upper side of the reef 1 as shown in FIG. . Then, the amount of air confined in the box through the ventilation pipe 63 is adjusted, and the sea level in the box is adjusted so that the fishing reef 1 is immersed in sea water in the box 61. In this state, seawater is electrolyzed by applying a voltage between the two electrodes 64a and 64b, and chlorine is generated at the anode and hydrogen is generated at the cathode and sodium hydroxide is generated. These react to produce sodium hypochlorite in seawater, and the growth of marine organisms attached to the fishing reef 1 can be suppressed.
In addition, when using this reef cleaning device 60, a drainage pipe similar to the device shown in FIG. 6 is provided, and after electrolysis is finished, the seawater in the box is sucked and discharged through the drainage pipe, It can also be processed at sea level.

FIG. 9: is a schematic sectional drawing which shows the state which cleans a fishing reef using this fishing device and the fishing reef cleaning apparatus which is the 7th Embodiment of this invention.
This fish reef cleaning device 70 includes a box 71, a suspension 72, a vent pipe 73, and a downward monitoring camera 75 similar to the device shown in FIG. 8, and further two seams for electrolyzing seawater. Although two electrodes 74a and 74b are provided, the two electrodes 74a and 74b are provided at positions close to the lower end in the box 71 in the fishing reef cleaning device 70 shown in FIG. These electrodes 74a and 74b are in contact with seawater even when the sea level in the box is lowered until the portion of the reef 1 to be cleaned is exposed on the sea level.
Further, the fish reef cleaning device 70 includes a high-pressure injection pipe 76, and injects high-pressure water or high-pressure compressed air supplied from the surface of the sea toward the reef 1 in the box 71. It has become.

In this fishing reef cleaning device 70, as shown in FIG. 9, the box 71 is installed so as to cover the side and upper side of the fishing reef 1 installed on the seabed, and then confined in the box 71 via the ventilation pipe 73. The amount of air that has been adjusted is adjusted, and the sea level in the box is lowered so that the area to be cleaned of the reef 1 is exposed on the sea level in the box 71. In this state, seawater is electrolyzed by applying a voltage between the two electrodes 74a and 74b, generating chlorine at the anode and hydrogen at the cathode. And marine life is exterminated by chlorine being contained in the air in the box.
Moreover, when using this reef cleaning apparatus 70, the drainage pipe similar to the apparatus shown in FIG. 6 was provided, the sea level in the box was once raised after the extermination of marine organisms, and occurred in the seawater. After reacting sodium hydroxide and chlorine, seawater in the box can be sucked and discharged through the drainage pipe and processed on the sea surface.

  Further, after killing marine organisms attached to the surface of the fishing reef 1, the sea level in the box 71 is lowered and high-pressure water or high-pressure compressed air or a mixture thereof is supplied to the reef 1 from the high-pressure jet pipe 76. It can be sprayed toward the sea, and it can peel off marine life that has been killed while attached to the reef. Thereby, efficient cleaning becomes possible. Moreover, the effect which peels off the dead marine organisms can also be improved by mixing and spraying granular solids, such as the sand etc. which adjusted the particle size, to these.

  Such a high-pressure injection pipe 76 can be employed in any of the fish reef cleaning devices 30, 40, 50, 60, 70 from FIG. 3 to FIG. 8, and is attached to the fish reef 1 by means of each. After the marine organisms are killed, the adhering marine organisms can be peeled off by jetting from the high-pressure jet pipe 76.

The fish reef cleaning method and the fish reef cleaning device described above are embodiments of the present invention, and the present invention is not limited to these. Therefore, it can be implemented with appropriate modifications within the scope of the present invention.
For example, in the above embodiment, the box is made of reinforced concrete, but a box made of metal such as steel can be used. In addition, the shape and size can be appropriately designed in accordance with the shape and size of the fish reef to be cleaned.
Further, the reef position detection means of the reef cleaning device according to the present invention employs, in addition to the above-described downward monitoring camera, a device that detects the position of the reef by transmitting an ultrasonic wave in water and detecting a reflected wave. You can also

1: fishing reef, 2: block for fishing reef, 2a: plate-like part, 2b: leg part, 2c: notch, 3: lifting machine, 4: suspension frame, 5: suspension material, 6: lifting material for winding, 7: Direction adjustment device,
10: fishing reef cleaning device, 11: box, 12: suspension hand, 13: vent pipe, 13a: pipe member, 13b: connector, 14: steam supply pipe, 14a: pipe member, 14b: connector, 15: downward monitoring camera 15a: external camera, 15b: internal camera, 16: hose, 17: hose, 18: pressure release hole,
20: fishing reef cleaning device, 21: box, 22: suspension hand, 23: vent pipe, 25: downward monitoring camera, 25a: external camera, 25b: internal camera, 26: heating device,
30: Reef cleaning device, 31: Box, 33: Vent pipe, 35: Downward monitoring camera, 36: Electromagnetic heating device,
40: fishing reef cleaning device, 41: box, 42: suspension hand, 43: vent pipe, 44: chemical supply pipe, 44a: connector, 45: downward monitoring camera, 46: drain pipe, 46a: connector, 47: hose, 48: suction hose,
50: fishing reef cleaning device, 51: box, 52: suspension hand, 53: vent pipe, 54: chemical supply pipe, 55: downward monitoring camera, 56: chemical jet pipe, 56a: nozzle,
60: fishing reef cleaning device, 61: box, 62: suspension hand, 63: vent pipe, 64a, 64b: electrode, 65: downward monitoring camera,
70: fishing reef cleaning device, 71: box, 72: suspension hand, 73: vent pipe, 74a, 74b: electrode, 75: downward monitoring camera, 76: high pressure injection pipe

Claims (4)

Installed a box with the lower part open and the side all around and the upper part closed, covering the fishing reef installed on the seabed from above,
A method for cleaning a fishing reef, characterized in that the environment in the box is in a state in which marine organisms attached to the surface of the fishing reef can be killed. A box that is open at the bottom and can cover the entire circumference and top of the side of the fishing reef installed on the seabed,
A suspension hand to which a suspension material for lifting or hanging the box from the sea surface is joined;
A ventilation pipe for injecting gas into or discharging from the inside of the box that is suspended and supported under the sea surface or the box installed on the sea floor;
A fishing reef cleaning device, comprising: a reef position detecting means for detecting the position of the reef in a state of being supported above the fishing reef and supported above the fishing reef installed on the seabed.   Marine organisms attached to the surface of the fishing reef exposed on the seawater surface in the box, or seawater in the box, which is installed so as to cover the entire circumference and upper side of the reef. The fishing reef cleaning apparatus according to claim 2, further comprising a disinfecting unit that kills marine organisms attached to the surface of the reef under the surface.   Injecting liquid, gas, or a mixture of liquid and gas into the inside of the box, or adding a granular solid to any of liquid, gas, and a mixture of liquid and gas, and injecting the surface of the reef The fishing reef cleaning apparatus according to claim 2, further comprising a removing unit that removes marine organisms killed in step (a).

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