JP4154527B2 - Ship bottom cleaning device - Google Patents

Description

  The present invention relates to a ship bottom cleaning apparatus, and more particularly to a ship bottom cleaning apparatus that cleans the bottom of a large ship from below on land.

  Ships are required to have periodic inspections once every four years. In the regular inspection, the ship is first stored in a dock on land. Then, painting work on the bottom of the ship, attaching / detaching operation of the rudder and propeller, color check, magnetic flaw inspection, etc. are performed in order.

  By the way, a lot of shellfish and the like are attached to the bottom of the ship, which is a resistance during navigation. For this reason, the bottom of the ship is washed during regular inspections.

  Patent Document 1 describes a method of cleaning a ship bottom by supplying a cleaning liquid to a storage tank floating on a ship at a predetermined flow rate. However, since this method requires a large storage tank and requires a large amount of cleaning liquid, it is impractical especially when cleaning the bottom of a large ship.

For this reason, conventionally, an operator grips the nozzle toward the bottom of the ship and ejects high-pressure water from the nozzle to remove deposits on the bottom of the ship.
Japanese Patent Laid-Open No. 11-217097

  However, since the conventional method injects very high-pressure water, it imposes a heavy burden on the operator holding the nozzle and the operator must work away from the bottom of the ship, and the workability is very poor. There was a problem.

  In addition, the conventional method has a problem in that a very large amount of water is required because high-pressure water is jetted for a long time, and the cost for cleaning is high.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a ship bottom cleaning device that has good workability and can reduce the amount of cleaning liquid used.

  According to a first aspect of the present invention, in order to achieve the above object, in a bottom washing apparatus for washing the bottom of a ship from below, a traveling vehicle that travels with an operator and a tank that is mounted on the traveling vehicle and stores cleaning liquid And a nozzle that is attached to the traveling vehicle and injects the cleaning liquid stored in the tank toward the ship bottom, and is disposed so as to surround the nozzle, collects the cleaning liquid injected from the nozzle, and is disposed on the ship bottom. A cover provided so as to be able to move forward and backward, a return device for filtering the cleaning liquid collected in the cover and returning it to the tank, and a cleaning liquid sprayed from the nozzle provided on the ceiling of the traveling vehicle. And a window glass portion for visually confirming a situation in which the ship bottom is cleaned.

  According to the first aspect of the present invention, the bottom of the ship can be cleaned by running the traveling vehicle while spraying the cleaning liquid from the nozzle toward the bottom of the ship. At that time, the washing state of the ship bottom can be visually recognized from the window glass part on the ceiling of the traveling vehicle.

  According to the first aspect of the present invention, the cleaning liquid ejected from the nozzle is collected by the cover, sent to the tank and sprayed again, so that the amount of cleaning liquid used can be greatly reduced. Further, since the cover is provided so as to be capable of moving forward and backward with respect to the ship bottom, the upper end of the cover can be brought close to the ship bottom, and the recovery rate of the cleaning liquid can be improved.

  According to a second aspect of the present invention, in the first aspect of the invention, the return device includes a suction unit that sucks the cleaning liquid in the cover, and a suction flow rate by the suction unit is a supply of the cleaning liquid to be fed to the nozzle. It is characterized by being set larger than the liquid flow rate.

  According to the invention described in claim 2, since the cleaning liquid in the cover is sucked at a flow rate larger than the liquid supply flow rate sent to the nozzle, the inside of the cover has a negative pressure, and air is discharged from the gap between the cover and the ship bottom. Is sucked. Therefore, it is possible to suppress the splash scattered by the cleaning liquid colliding with the ship bottom from flowing out of the gap. Thereby, the recovery rate of the cleaning liquid can be further improved, and the amount of the cleaning liquid used can be greatly reduced.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the cover moves forward and backward with respect to the bottom of the ship in accordance with a difference between the suction flow rate and the liquid feeding flow rate.

  In the invention according to claim 3, for example, when the difference between the suction flow rate and the liquid supply flow rate is large, the cover is advanced to the bottom of the ship. Thereby, since the clearance gap between a cover and a ship bottom becomes small, it can suppress that splash splashes from a clearance gap. On the contrary, when the difference between the suction flow rate and the liquid supply flow rate is small, the cover is retracted from the bottom of the ship. Thereby, since the clearance gap between a cover and a ship bottom becomes large, it can prevent that a big burden is applied to a pump.

  According to a fourth aspect of the present invention, in the first to third aspects of the present invention, the window glass member is provided with a wiper.

  According to the fourth aspect of the present invention, since the wiper is provided on the window glass portion, it is possible to always visually recognize the state of cleaning the ship bottom.

  According to the ship bottom cleaning apparatus according to the present invention, the ship bottom can be cleaned without placing a burden on the operator by running the traveling vehicle while spraying the cleaning liquid from the nozzle toward the ship bottom.

  Further, according to the present invention, the cleaning liquid sprayed from the nozzle is collected by the cover, sent to the tank, and circulated for use, so that the amount of cleaning liquid used can be greatly reduced. Therefore, even the bottom of a large ship can be washed at low cost.

  A preferred embodiment of a ship bottom cleaning apparatus according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a side sectional view schematically showing the structure of a ship bottom cleaning apparatus according to the present invention.

  As shown in the figure, the ship bottom cleaning apparatus includes a traveling vehicle 12 that can travel with an operator. The traveling vehicle 12 is equipped with a drive device (not shown) for rotationally driving the wheels 14, 14... And travels at an arbitrary speed in an arbitrary direction by operating an operation means such as a handle 17. It is configured as follows. The traveling vehicle 12 is provided with a driver seat 16, and an operator sits on the driver seat 16 to drive the traveling vehicle 12. A windshield 18 is provided on the front surface of the traveling vehicle 12 so that an operator can visually recognize the front. In addition, it is good to ensure the visual field at the time of driving | running | working by providing the window glass which can be visually recognized suitably also at the side surface and back surface of the traveling vehicle 12.

  A circular window glass (corresponding to a window glass portion) 20 is disposed on the ceiling 12 </ b> A of the traveling vehicle 12. The window glass 20 is arranged above the driver's seat 16 so that the operator can visually recognize the upper side of the traveling vehicle 12 through the window glass 20 by looking up at the upper side while sitting on the driver's seat 16. . Note that the window glass 20 may be a transparent member, and plastic or the like may be used. Moreover, the shape of the window glass 20 is not limited to a circle, and may be another shape such as a rectangle.

  A rotary wiper 22 is provided outside the window glass 20. As shown in FIG. 2, the wiper 22 is supported by a rotating shaft 22A disposed at the center of the window glass 20, a support member 22B attached so as to be orthogonal to the rotating shaft 22A, and the support member 22B. The rotating shaft 22A is configured to rotate by driving a motor 22D. Then, by rotating the rotating shaft 22A, the rubber 22C slides on the window glass 20, and water droplets attached to the window glass 20 are wiped off. The wiper 22 is not limited to a rotary type, and a swing type that swings within a certain angular range may be used.

  A rotary sprinkler 24 is disposed above the window glass 20. The sprinkler 24 includes a plurality of (for example, two) nozzle tubes 24B each having a nozzle 24A formed at the tip. The nozzle tube 24B is rotatably supported through the joint portion 24C and communicated with the liquid feeding tube 26. As shown in FIG. 1, the liquid supply pipe 26 is connected to a storage tank 30 via a liquid supply pump 28, and water is stored as a cleaning liquid in the storage tank 30. Therefore, by driving the liquid feed pump 28, the water stored in the storage tank 30 is sent to the sprinkler 24 through the liquid feed pipe 26. Thereby, water can be ejected from the nozzles 24 </ b> A and 24 </ b> A of the diffuser 24.

  The nozzles 24A and 24A are formed upward toward the ship bottom 46 and are slightly inclined with respect to the vertical direction. For example, the upper end of the right nozzle 24A in FIG. 2 is inclined toward the near side, and the upper end of the left nozzle 24A is inclined toward the rear side. Accordingly, when water is ejected from the nozzles 24A, 24A, the nozzles 24A, 24A are rotated by the reaction. The nozzle tubes 24B and 24B may be connected to the support member 22B of the wiper 22, and the support member 22B may be rotated by the reaction of water sprayed from the nozzle 24A.

  A cover 32 is provided on the ceiling 12 </ b> A of the traveling vehicle 12 so as to surround the sprinkler 24. The cover 32 is configured by assembling three cylindrical bodies 32A, 32B, and 32C having different diameters in a nested manner. Of the cylinders 32A to 32C, the cylinder 32A having the smallest diameter is fixed to the ceiling 12A of the traveling vehicle 12, and the cylinder 32B is slidably engaged with the outside of the cylinder 32A in the vertical direction. The cylindrical body 32C is engaged with the outside of the body 32B so as to be slidable in the vertical direction. The cylinders 32 </ b> A to 32 </ b> C are formed of a material that transmits light sufficiently, for example, transparent acrylic, and can transmit external light into the cover 32. Thereby, since light is taken into the inside of the cover 32, the inside of the cover 32 can be visually recognized from the window glass 20. Note that a waterproof illumination lamp 36 is provided on the ceiling 12A of the traveling vehicle 12. When the brightness in the cover 32 is insufficient, light can be emitted from the illumination lamp 36 into the cover 32. It has become.

  The rod 34C of the cylinder 34 is connected to the cylinder 32C. The cylinder 34 is fixed upward on the ceiling 12 </ b> A of the traveling vehicle 12. Therefore, the cylindrical body 32C can be moved up and down by expanding and contracting the rod 34C, and the cover 32 can be expanded and contracted. That is, the upper end of the cover 32 can be moved forward and backward with respect to the ship bottom 46.

  Further, a non-contact sensor (not shown) for measuring the distance from the ship bottom 46 is attached to the cylinder 32C. The cylinder 34 is driven and controlled by the measured value of the sensor. During the cleaning operation, the distance between the upper end of the cylinder 32C and the ship bottom 46 is controlled to be within a predetermined range.

  Of the cylinders 32A to 32C, the cylinder 32A may be formed of a metal such as stainless steel and welded to the ceiling 12A of the traveling vehicle 12 to be fixed. Further, by attaching a cover rubber or the like to the upper end of the cylindrical body 32C, the bottom 46 may be prevented from being damaged when the cylindrical body 32C contacts the ship bottom.

  In the above-described example, the cover 32 is configured by the three cylindrical bodies 32A to 32C. However, the number of the cylindrical bodies 32A to 32C is not limited to this, and the number of the cylindrical bodies 32A to 32C is four or more. Also good. Furthermore, the structure of the cover 32 is not limited to the example mentioned above, What is necessary is just to surround the water sprinkler 24 and to be able to expand-contract vertically. Therefore, for example, the cover 32 may be configured by a bellows.

  In the above-described example, the cover 32 is expanded and contracted by the cylinder 34, but means for expanding and contracting the cover 32 is not limited to this. For example, the cover 32 may be provided with a cam mechanism that changes the rotational force to move in the vertical direction, and the cover 32 may be expanded and contracted by applying a rotational force to the cover 32 with a motor or the like.

  A recovery pipe 38 is connected to the ceiling 12 </ b> A of the traveling vehicle 12 at a position inside the cover 32. As shown in FIG. 1, the recovery pipe 38 is connected to a suction pump 40 installed in the traveling vehicle 12, and water recovered in the cover 32 by driving the suction pump 40 is supplied to the recovery pipe 38. Sucked. At that time, the suction pump 40 is set so that the suction flow rate is slightly larger than the liquid feed flow rate by the liquid feed pump 28. Accordingly, since the flow rate sucked into the collection pipe 38 is larger than the flow rate of water injected into the cover 32, the inside of the cover 32 becomes negative pressure. As a result, air enters the inside of the cover 32 from the gap between the cover 32 and the ship bottom 46, and splashing of the splash from the gap can be suppressed. Here, the suction flow rate is the sum of the flow rate of recovered water and the volume of air expanded by suction. The liquid supply flow rate is a flow rate of water supplied to the nozzle 24A by the liquid supply pump 28 and ejected from the nozzle 24A.

  The discharge side of the suction pump 40 is connected to a gas-liquid separator 42, and water and air sucked by the suction pump 40 are sent to the gas-liquid separator 42. The gas-liquid separator 42 is a device that separates air and water. For example, a cyclone separator is used. A filtration tank 44 is provided below the gas-liquid separator 42, and water separated by the gas-liquid separator 42 falls into the filtration tank 44. A filtration filter (not shown) is provided inside the filtration tank 44, and deposits such as shellfish that have fallen from the ship bottom during cleaning are removed by the filtration filter.

  The water from which deposits such as shellfish are removed is sent to the storage tank 30 and stored. The water in the storage tank 30 is sent again to the nozzle 24A and is ejected from the nozzle 24A. Then, after being collected by the cover 32, it is sucked by the suction pump 40 and is collected in the storage tank 30 via the gas-liquid separator 42 and the filtration tank 44. Thereby, the water used for washing circulates.

  By the way, the above-described cylinder 34 is driven and controlled in accordance with the difference between the liquid feed flow rate by the liquid feed pump 28 and the suction flow rate by the suction pump 40. For example, when the difference between the liquid feeding flow rate and the suction flow rate is small, the rod 34C of the cylinder 34 is driven to be contracted. In this case, the negative pressure inside the cover 32 is large, and the load on the suction pump 40 may be excessive. Therefore, the rod 34C is contracted to increase the gap between the cover 32 and the ship bottom 46, thereby reducing the negative pressure in the cover 32 and reducing the load on the suction pump 40.

  Conversely, when the difference between the liquid feeding flow rate and the suction flow rate is large, the rod 34C of the cylinder 34 is extended. In this case, the negative pressure inside the cover 32 is in a small state, and there is a possibility that a large amount of water splashes from the gap. Therefore, by spreading the rod 34C and reducing the gap between the cover 32 and the ship bottom 46, it is possible to effectively suppress the splashing of water from the gap.

  In this way, by controlling the cylinder 34 in accordance with the difference between the liquid flow rate by the liquid feed pump 28 and the suction flow rate by the suction pump 40, the load on the suction pump 40 can be prevented from being excessively increased. Scattering can be effectively suppressed. Note that the liquid flow rate and the suction flow rate may be measured by arranging flow meters in the liquid supply tube 26 and the recovery tube 38, respectively.

  Next, the operation of the ship bottom cleaning apparatus configured as described above will be described.

  The operator steers the traveling vehicle 12 and travels below the ship bottom 46. Then, the cover 32 is extended by driving the cylinder 34, and the upper end of the cover 32 is brought close to the ship bottom 46. At this time, the clearance between the ship bottom 46 and the cover 32 is set to about 10 to 20 mm.

Next, the liquid feeding pump 28 is driven, and the liquid feeding of water to the nozzle 24A is started. Thereby, high-pressure water as high as 100 kg / cm ² is ejected from the nozzle 24A. And nozzle 24A rotates by reaction of the injected water. That is, high-pressure water is sprayed toward the ship bottom 46 while the nozzle 24A rotates. Then, the jetted water collides with the ship bottom 46, so that the deposits such as shellfish attached to the ship bottom 46 are removed. Thereby, the ship bottom 46 is washed.

  When cleaning the ship bottom 46, the operator can visually check the cleaning status through the window glass 20 on the ceiling 12A. At this time, since the cylinders 32A to 32C of the cover 32 are made of transparent acrylic, external light is taken into the cover 32, and further, illumination light is irradiated by the illumination lamp 36 when the brightness is insufficient. . Furthermore, the water adhering to the outer side of the window glass 20 is wiped by driving the wiper 22. Thereby, the visual field from the window glass 20 can always be maintained in a good state, and the cleaning situation can be accurately grasped.

  The water jetted from the nozzle 24 </ b> A collides with the ship bottom 46 and splashes as splashes. Then, after being collected by the cover 32, it is sucked into the collecting pipe 38 by the suction pump 40. At this time, since the suction flow rate by the suction pump 40 is larger than the liquid supply flow rate by the liquid feed pump 28, it is possible to prevent water from being stored in the cover 32 and collecting on the window glass 20. Further, since the suction flow rate is larger than the liquid feeding flow rate, air flows into the cover 32 from the gap between the cover 32 and the ship bottom 46. Due to the generation of this air flow, it is possible to suppress the splashing of the outside of the cover 32 as much as possible. Therefore, the recovery rate of the water sprayed from the nozzle 24A can be improved.

  The air and water sucked by the suction pump 40 are sent to the gas-liquid separator 42 for gas-liquid separation, and the separated water is sent to the filtration tank 44, and shellfish contained in the water. The deposits are removed. And water is sent and stored in the storage tank 30, and is again injected from the nozzle 24A. Therefore, since water is circulated and used, the amount of water used can be greatly reduced.

  The operator performs cleaning continuously while running the traveling vehicle 12 at a constant speed. At that time, the cleaning condition is confirmed from the window glass 20, and if the dirt is severe, the traveling vehicle 12 is stopped or the speed is decreased to perform intensive cleaning. And after confirming that washing | cleaning was performed, the traveling vehicle 12 is moved again. By repeating this, the entire ship bottom 46 can be washed.

  As described above, according to the ship bottom cleaning device of the present embodiment, the nozzle 24A is mounted on the traveling vehicle 12, and water is injected from the nozzle 24A at a high pressure. It can be cleaned and the burden on the operator can be reduced.

  Moreover, according to this Embodiment, since the window glass 20 was provided in the ceiling 12A of the traveling vehicle 12, the washing | cleaning condition of a ship bottom can be grasped | ascertained. In particular, in the present embodiment, since the transparent acrylic cover 32 is used and the illumination lamp 36 is provided to secure the amount of light, and the window glass 20 is provided with the wiper 22 to secure the field of view, the washing state of the ship bottom 46 is always maintained. Can be grasped.

  Further, according to the present embodiment, the water jetted from the nozzle 24A is collected by the cover 32, and is filtered by the filtration tank 44 and then sent to the storage tank 30, so that the water is recycled and used. The amount of use can be greatly reduced. Therefore, even the bottom 46 of a large ship can be washed at low cost.

  Furthermore, according to the present embodiment, since the suction flow rate by the suction pump 40 is larger than the liquid flow rate by the liquid feed pump 28, water can be prevented from collecting on the window glass 20, and the cover 32, the ship bottom, It is possible to suppress the splashing of water from the gap. Thereby, while being able to ensure the visibility by the window glass 20, the recovery rate of water can be improved.

  In addition, according to the present embodiment, since all components such as the storage tank 30, the cover 32, the suction pump 40, the gas-liquid separator 42, and the filtration tank 44 are mounted on the traveling vehicle 12, the traveling vehicle 12. There is no need to connect a hose. Therefore, the traveling vehicle 12 can travel freely and workability can be improved.

  In addition, although embodiment mentioned above provided the window glass 20 in order to visually recognize the washing | cleaning condition, it does not limit to this, A waterproof camera is provided in the cover 32, the washing | cleaning condition is image | photographed, the You may make it display a picked-up image on the monitor in the traveling vehicle 12. FIG.

  In the above-described embodiment, the water in the cover 32 is sucked by the suction pump 40, but may be naturally dropped into the storage tank 30.

  Furthermore, although embodiment mentioned above fixed the sprinkler 24 and the cover 32 to the ceiling 12A of the traveling vehicle 12, it is not limited to this. For example, the sprinkler 24 and the cover 32 are fixed on a movable table to be unitized, and the table is attached to the traveling vehicle 12 via an arm or the like and moved in the vertical direction or the horizontal direction. Good. In this case, the cleaning position can be changed simply by moving the table. Further, if the table can be inclined, the inclined surface of the ship bottom 46 can be cleaned.

Side surface sectional view which shows roughly the structure of the ship bottom washing | cleaning apparatus which concerns on this invention Partial enlarged view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 12 ... Traveling vehicle, 14 ... Wheel, 16 ... Driver's seat, 18 ... Windshield, 20 ... Window glass, 22 ... Wiper, 24 ... Sprinkler, 24A ... Nozzle, 26 ... Liquid feed pipe, 28 ... Liquid feed pump, 30 DESCRIPTION OF SYMBOLS ... Storage tank, 32 ... Cover, 34 ... Cylinder, 36 ... Illumination lamp, 38 ... Collection pipe, 40 ... Suction pump, 42 ... Gas-liquid separator, 44 ... Filtration tank, 46 ... Ship bottom

Claims (4)

In the ship bottom cleaning device for cleaning the ship bottom from below,
A traveling vehicle that carries an operator, and
A tank mounted on the traveling vehicle and storing a cleaning liquid;
A nozzle that is attached to the traveling vehicle and injects the cleaning liquid stored in the tank toward the ship bottom;
A cover that is disposed so as to surround the nozzle, and is provided so as to collect the cleaning liquid sprayed from the nozzle and to be movable forward and backward toward the ship bottom;
A return device for filtering the cleaning liquid collected in the cover and returning it to the tank;
A window glass portion for visually confirming a situation in which the ship bottom is washed by the washing liquid sprayed from the nozzle, provided on the ceiling of the traveling vehicle;
A ship bottom cleaning device comprising:   The return device includes a suction unit that sucks the cleaning liquid in the cover, and a suction flow rate by the suction unit is set larger than a flow rate of the cleaning liquid to be fed to the nozzle. The ship bottom cleaning apparatus according to 1.   The ship bottom cleaning apparatus according to claim 1, wherein the cover moves forward and backward with respect to the ship bottom according to a difference between the suction flow rate and the liquid supply flow rate. The ship bottom cleaning apparatus according to any one of claims 1 to 3, wherein the window glass portion is provided with a wiper.

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