JP4446034B1 - Underwater maintenance equipment for ship propellers - Google Patents

Abstract

【Task】
Rather than putting the propeller of an in-service vessel into a dock and polishing it, the technology and propeller to polish the propeller to a roughness that will have the effect of delaying the landing of marine deposits in the water underwater. The technology to measure the roughness of the propeller surface required for maintenance management of the machine was required.
[Solution]
An underwater roughness meter that measures the roughness of the surface of the propeller in water, an underwater propeller polisher that can polish the polishing accuracy to Ra 1 μm or less, and a peeled material collection that can collect the generated peeled material in a peeled material storage device on the water surface Invented an underwater repair facility for ship propellers equipped with the device.
[Selection] Figure 1

Description

The present invention polishes the propeller in water to a roughness that can delay the landing of marine deposits on the ship's propeller, collects the exfoliation that occurs during polishing, and measures the surface roughness of the propeller in water It is possible to confirm the performance of the underwater propeller in service, and it relates to maintenance management and underwater maintenance equipment that performs polishing and roughness measurement.

Usually, a ship is sailing with the cruise speed maintained, but with the passage of time, the fuel consumption increases if the cruise speed is maintained.

This may be due to the deterioration of the ship's equipment, but with the passage of time, marine deposits are attached to the hull skin and propeller, which increases the resistance of the hull skin and propeller. Because it is big.

In order to maintain the cruising speed, the ship maintains the speed by consuming as much fuel as the resistance increases so as not to hinder the operation when the resistance due to the landing object increases.

The problem of increased fuel consumption due to landings was not so important when measures for energy saving operation and global warming due to CO2 emissions from ships were not prominent.

Still, if the hull and propeller are too dirty, the fuel consumption will increase and the engine load will be applied.Therefore, divers use a cleaning tool in the water to clean the hull skin and propeller to reduce the load. It has been.

As for the hull outer plate, paints that are difficult to adhere to marine deposits have been developed, and it is no longer necessary to consider the effect of marine deposits on resistance.

As for the propulsion unit, particularly the propeller unit, a coating material and a coating technique that do not have a marine deposit dedicated to the propeller have not yet been established. Therefore, it continues to be affected by marine deposits, and as a countermeasure, propellers are cleaned and polished underwater by divers.

As an underwater propeller cleaning and polishing method, a scraper and scrubbers are used to manually remove dirt attached to the surface of the propeller by a diver.

In addition, a method in which a diver performs propeller cleaning in water with a cleaning machine and a polishing machine that use power is also implemented.

Conventionally, propeller cleaning performed in water was propeller cleaning aimed at removing dirt on the propeller surface and reducing engine load.

The cleaning that has been performed so far only cleans the surface of the propeller, so it works cleanly and efficiently immediately after cleaning, but after one to two weeks, marine deposits start to adhere to the propeller surface, and the deposits As a result, resistance was generated in the propeller and the propeller efficiency began to drop.

There is a method of performing polishing by attaching a polishing pad to an air sander as a cleaning method using an underwater polishing machine. If this method is used, the field of view is hindered by the blowing of air, making it difficult to secure the field of view. In addition, an air sander that needs to be applied evenly but only partly cuts the surface of the propeller, resulting in poor installation accuracy. Furthermore, if the size of the polishing pad of the air sander polishing machine is about 10 cm and larger, the resistance of water will increase, the rotational speed and torque will decrease, and polishing with precision that may be performed can not be performed. Even if the roughness is improved, it is about Ra 10 μm .

As a cleaning method using an underwater polishing machine, there is a method in which a diamond disk pad is attached to a water flow type polishing machine. The water flow type polishing machine can secure a field of view as compared with the air sander, but the roughness of the polishing can be improved but is about Ra 1 μm .

In the above cleaning method, even if it is polished in water, it can be polished (normally, the surface roughness of the propeller surface is said to be about Ra 3 μm to Ra 5 μm in the state of new construction and after completion of propeller polishing in the dry dock) The roughness of the propeller is said to be limited to about Ra 1 μm . However, the closer the surface roughness of the propeller is to Ra0 μm , the better the propeller is. When Ra is 1 μm or less, especially Ra is 0.5 μm or less, it takes time for several months or more to deposit deposits, and resistance loss due to contamination of the propeller hardly occurs.

There was no polishing technique with a propeller polishing machine that would give a roughness of Ra 1 μm or less in water, and there was no roughness meter that could measure the roughness of the propeller surface in water.

But are currently in the propeller polishing of underwater done it can not be performed the following polishing Ra1μm in water because there is no polishing machine that can be in the following Ra1μm is a polishing machine that is currently being used.

Currently, hydraulic power, water flow, and air motors are used as the power source of the underwater polishing machine. These power motors are made on the ground, not underwater specifications, and this power motor is brought into the water. If used, not only will the number of revolutions drop drastically due to unexpected changes in conditions, but the performance of the machine will also drop.

In order to reduce the roughness of propeller polishing to Ra 1 μm or less, a polishing machine motor having a strong torque in water and a performance capable of rotating the outer periphery of the polishing pad at high speed is required.

However, if the grinding machine rotates with too strong torque or high speed, the diver is swung around the grinding machine, which is dangerous.

The underwater polishing machine must be safe to operate by hand (current average Japanese diver) and have a polishing roughness of Ra1μm or less. Because the construction surface is almost vertical, the polishing machine should be easy to operate even on vertical surfaces. Further, it is a necessary condition for the underwater propeller polishing machine that the propeller surface, which is a curved surface, can be uniformly cleaned.

One type of polishing pad attached to an underwater polishing machine is a diamond disk polishing pad. When this diamond disk is used for polishing, the surface is roughened, and the shavings removed from the propeller during underwater polishing can be confirmed to shine and shine. In the measurement of the roughness after polishing with this diamond disk, polishing up to about Ra 1 μm was the limit. If the polishing is about Ra 1 μm, deposits will begin to adhere to the propeller within a few weeks. Further, when this diamond disk is used many times, it is predicted that the propeller will continue to be sharpened, so that it is predicted that the curved surface of the propeller will change. Especially, the performance of the propeller may change greatly in the vicinity of the tip.

The method of polishing the surface of the propeller in water to check the roughness is to measure the propeller roughness by placing a propeller on the water surface, and the rupert gauge (several types of roughness sample plates) and the propeller that are brought into the water. There is a method in which a diver compares the surface of the surface with tentacles and visually. Until now, water roughness meter which can be expressed by the numerical value of at Ra0.1μm unit performs a roughness measurement in water has not been developed.

Until now, the maintenance management method and underwater polishing technology by the roughness of the propeller underwater of the ship in service has not been established. Therefore, since it was not necessary to strictly measure the roughness, the roughness measurement and the propeller surface roughness management with visual confirmation were sufficient.

In order to control the propeller performance by increasing the roughness of the propeller in service (smoothing), it is necessary to measure the roughness in water. The method of measuring the roughness of a ship's propeller in water is only a method using a rupert gauge, and an underwater roughness meter capable of confirming the roughness with numerical values and a method for measuring roughness have not been established. Currently, to measure the roughness of the propeller numerically, simply place the propeller on the water surface and measure it, or place it in a dock and dry it. However, it is almost impossible to do these only for roughness measurement on ships in service.

There are roughly two types of roughness meters: non-contact type roughness meter (a method that measures the roughness by irradiating the surface of the target roughness measurement object with light or ultrasonic waves and analyzing the reflected wave) and contact roughness There is a meter (a method in which the stylus part directly touches the surface of the target roughness measurement object to measure unevenness).

When using a non-contact type roughness meter, the equipment is too large and the machine is too precise. It is almost impossible to bring a meter in consideration of maintenance management and cost burden, and it is difficult to use this machine for roughness measurement where the measurement place moves every time.

When using a contact-type roughness meter, the stylus part operates and measures, so even if you put it in the pressure box and bring it into the water, the pressure gauge box can measure this stylus part underwater through the pressure box without error It is also very difficult to produce.

Comparing the contact-type roughness meter and the non-contact-type roughness meter in terms of price and ease of use, the non-contact-type roughness meter is very expensive and costs around tens of millions of yen. It is about a yen.

The contact-type roughness meter has a size of about 10 cm × 20 cm × 10 cm and can be carried easily, but the non-contact type roughness meter is too large and too precise to carry, There is a drawback that handling on board is difficult.

At present, the contact-type roughness meter can be carried to measure the roughness of the ship after propeller polishing at the dock, so it is widely used and has no problem in measuring the roughness of the propeller.

Some portable contact-type roughness meters have a measuring part and a computing part connected by a cable, but this type has a disadvantage that the performance changes when the cable is short and the cable is extended long, and it can be extended too long. There are many things that cannot be done.

The propeller of the ship in service is underwater, and the bottom position of the propeller is about 5 m below the surface of a 1000-ton class ship. Even if the measuring part of the portable contact-type roughness meter is placed in a pressure-resistant box so that it can be used underwater with the drawbacks of the stylus part, the calculation part with the operation and display part can be put out on the water surface because the cable is short There are things that cannot be done.

Roughness measurement can be done by lengthening the cable to the measuring part of the roughness meter, bringing only the measuring part into the water, operating from the land part and receiving instructions from the telephone, and measuring the roughness, It is possible to measure more reliably and faster by operating the roughness meter measuring unit while confirming the measured numerical value.

Many portable contact-type roughness meters that are currently on the market use a capacitance in the calculation section. There is no problem even if the contact type roughness meter that does not use capacitance is pressurized, but if the portion using capacitance is pressurized, it will be damaged by the pressure.

In the propeller cleaning and polishing operations carried out in water, almost no collected matter is collected. As for the recovery method, the diver receives the exfoliation generated during cleaning in a bag and manually collects it, and most of the exfoliation is released into the water and dumped and accumulated on the sea floor. . Also, even if you want to recover, it is often impossible to recover due to the influence of tides and waves.

The roughness of the propeller when docking is Ra3 μm to Ra5 μm . With this roughness, the propeller begins to adhere to the propeller from the first to the second week. Release of these deposits and polishing debris into the water during a cleaning operation causes environmental pollution, so the underwater propeller polishing machine must be a polishing machine with a system that can recover the exfoliation.

An underwater polishing apparatus disclosed in JP-A-2005-297090 is an apparatus for polishing by pressing a disk of a polishing machine facing upward. In order to counteract the reaction force that occurs, the device rotates the wings in the opposite direction to the polishing disk to balance the reaction force, and uses a suction device to generate negative pressure that is adsorbed to the polishing surface. Since the present invention polishes a propeller whose polishing surface is vertical, a structure in which negative pressure is generated in the polishing disk or a structure in which a polishing disk containing an abrasive generates a dent in the center at the time of polishing has a dent inside the disk, It is an apparatus that drains water to the outside of the polishing machine to generate a negative pressure and uses the negative pressure to adsorb itself. Also in the recovery of polishing scraps, a method for recovering polishing scraps by creating a recovery portion with a separate hood cover that has been blown out of the disc by the rotation of the polishing disc and collecting it without taking it out of the cover. There is a big difference in the suction method.

In the underwater polishing apparatus disclosed in Japanese Patent Laid-Open No. 2005-297090, polishing and suction are operated by the same power source. In the present invention, since the diver is constructed using the underwater polishing machine in hand, the recovery device is installed outside the polishing machine. There is a big difference in that the recovery power is structured to use negative pressure. The object to be polished is a marine propeller, which is vertical in the water, and the polishing debris is discharged out of the polishing part by centrifugal force by the polishing pad. This is a method of collecting in the apparatus, and the polished debris is not in the closed area, so that it does not diffuse inside. There is also a difference in that it is not affected by polishing debris.

The underwater polishing apparatus disclosed in Japanese Patent Application Laid-Open No. 58-94962 is a method for polishing by operating a rotary polishing machine by remote operation by a machine. The object and the polishing surface which are the objects of this polishing machine are fixed, and the polishing machine is also polished in a fixed state during polishing. The object to be polished according to the present invention is a propeller of a ship, and the propeller on the polishing surface is affected by marine weather and always swings simultaneously with the ship. In addition, divers to be constructed must work in an environment that swings. There is a fundamental difference in the construction environment compared to the case where the machine is fixed to the construction surface fixed in the static water area by remote control. Furthermore, since the underwater propeller polishing machine of the present invention is a polishing that is carried in water by a human hand, there is a great difference in the construction method.

Japanese Patent Application Laid-Open No. 5-069888 is a method for repairing the surface of a propeller by repairing the propeller for a ship to make the propeller in good condition, but the present invention polishes the surface of the propeller more than at the time of manufacture to make the propeller in good condition There is a big difference in improving the performance rather than repairing.

JP-A-8-207890 A marine propeller and its manufacturing method is a method for maintaining the performance of a propeller by forming a film on the propeller so that no seaweed or deposits are attached. There is a big difference in that the film is not adhered because it is a method of improving the performance by polishing the surface to a roughness that does not adhere to the surface.

In a suction device for a hand-held device, the back surface and the outer periphery of the polishing disk are connected to a negative air pressure generator with a hood so that polishing waste can be sucked. In the case of operation in a low-density air, suction is possible by this method, but since the present invention is a polishing apparatus used in water, in this case, the polishing machine uses a polishing machine with a high density of water due to the negative pressure generated by the polishing machine. This means that the negative structure of the suction device is completely different because the negative thickness of the air cannot suck the polishing waste at the same time as the water.

In fact, the polishing equipment for marine propellers is equipment for grinding propellers, but it is a ground grinding equipment that can be used at the docks of propeller factories or shipyards. There is a big difference in the conditions that can be used.

JP 2005-297090 A JP 58-94962 A Japanese Patent Laid-Open No. 5-069888 JP-A-8-207890 JP-A-11-216671 Jin-Sho 58-160755

Polishing propellers in onshore shipbuilding facilities, not propeller maintenance and management methods, polishing propulsion units of moored vessels in water, and ensuring that the surface roughness of the propeller is as low as possible without putting the vessel in the dock Maintenance management and maintenance equipment that keeps in the vicinity of good Ra0μm .

The present invention provides a maintenance facility that can manage a ship's propeller underwater with a method using an underwater polishing machine and underwater roughness measuring equipment while floating on the water while mooring without much trouble in operation. Objective.

Underwater is not calm and the ship is constantly shaking due to the movement of water. Propellers are always moving, and divers who are constructing are also shaking. The propeller to be polished has a curved surface, and an object is to provide an underwater propeller polishing machine that can be operated with an appropriate size that can be held by a person while swinging with each other and can polish a curved propeller.

An object is to provide an underwater propeller polisher that improves the operability by generating a negative pressure in the underwater propeller polisher even on the vertical and ceiling polished surfaces, and by adsorbing the underwater propeller polisher to the propeller by the negative pressure. .

The purpose is to provide a roughness meter that can measure the roughness of a propeller in water using a roughness measurement auxiliary box and an underwater roughness measurement method that can be confirmed even when the roughness measurement value is on the water.

The roughness measurement auxiliary box attached to the surface for measuring the roughness of the water is a structure in which the diver can easily install, remove and handle, and the diver has a structure that allows the diver to visually check the inside of the roughness measurement auxiliary box from underwater. The purpose is to provide a roughness measurement auxiliary box.

The contact-type roughness meter that uses the roughness measurement auxiliary box also has a shape in which the calculation unit and measurement unit are separated so that the structure is as small as possible. An object of the present invention is to provide an underwater propeller roughness measuring facility that has a structure that can be operated from the outside while being maintained, and that has a structure in which the measurement unit pressure box can equalize external pressure even under pressure and negative pressure.

The exfoliation recovery device attached to the underwater polishing machine aims to provide a exfoliation recovery device that is easy to attach and detach, easy to handle, and can safely operate even if the exfoliation recovery device is attached to the underwater propeller polishing machine. .

The amount of polishing waste generated by underwater propeller polishing is calculated assuming that the maximum Ra5 μm of polishing roughness at the time of manufacture is polished to Ra 0.3 μm, and the volume of the surface peeling portion of the propeller is about 700 mm 3 or less (diameter of 6 m2 axis) It is an approximate value when propeller of a propulsion machine is polished. The object is to provide a delamination recovery device that can recover deposits and debris.

Since the surface roughness of the propeller is Ra1μm or less in the second and subsequent rounds, the polishing scrap has a volume of about 50mm3 or less at maximum ( diameter of approximately 6mm3 when grinding a diamond 6m, biaxial thruster to Ra0μm. Calculated). From the third time onward, it will be less and will not affect the environment, and the act of collecting will have a greater impact on the environment. Further, the object of the present invention is to provide an exfoliation recovery device that can be easily attached to and detached from the polishing machine and is easy to handle because the amount of marine deposits is extremely small and the amount of exfoliation until the recovery device is installed and recovered is almost eliminated. .

In order to shorten the recovery time of the exfoliated material in the exfoliated material storage device, a method of precipitating quickly by using a settling agent in the exfoliated material storage device and water containing fine powder in the exfoliated material storage device. The purpose is to provide equipment that reliably collects the peeled material in a short time using a micro-separated material collecting device that sucks up and collects it with a pump.

The purpose is to provide a delamination recovery device that can collect almost all delaminations using the exfoliation storage device and the fine exfoliation recovery device without illegally dumping the exfoliation generated during propeller polishing into the sea outside the underwater propeller polishing machine. And

The present invention is an underwater maintenance facility using an underwater polishing machine and an underwater roughness meter for ship propellers, which have been made in view of the above problems.

In the present invention, maintenance management of the ship propeller can be performed underwater during mooring without entering the dock .

The underwater propeller polishing machine of this equipment has a structure in which the polishing disk is made of a material containing an elastic body and has a cushioning and water permeability in the disk part and a dent in the center part in order to adsorb it on a curved propeller. A structure in which a polishing disc containing an abrasive generates a dent in the center when rotated. By rotating the polishing disc at a high speed and removing the water in the dent and the periphery of the disc to the outside of the disc, the polishing disc is negatively affected inside and around the disc. Even if the propeller has a vertical polishing surface by generating a pressure and adsorbing the underwater propeller polishing machine to the propeller by the negative pressure, it is a polishing machine that can be easily operated by a human hand in water.

Oite this facility, in order to improve the polishing precision of the underwater propeller polishing machine, water propeller grinders, even when subjected to water resistance in the water, and also the polishing pad is pressed against the propeller, hinder polishing This is a polishing machine that has a performance of rotating at a high speed of 1000 rpm to 10,000 rpm at a pressure of 8 MPa to 50 MPa that generates a strong torque that does not generate a crack , and can polish the surface of the propeller to a roughness of Ra 1 μm to Ra 0.01 μm .

In the invention according to the second aspect, the roughness measurement surface in water can be measured in water.

In the invention described in claim 2, the roughness meter uses a contact-type roughness meter having a structure in which a calculation unit and a measurement unit are separated, and is also used in a calculation unit and under pressure where parts that cannot be used under pressure are used. The measurement units that can be divided into individual pressure chambers are placed in a pressure-resistant box, and the pressure transmission prevention connector and the pressure-resistant cable are connected to each other so that pressure is not transmitted to others and the calculation unit is not pressurized. In addition, the calculation unit pressure box when it can not be used unless it is brought into water is a structure that can check the operation and display of roughness measurement in water, the measurement unit pressure box is a pressure box with a structure that can respond to external pressure changes, The measuring part of the portable contact-type roughness meter is made up of parts that are not affected by pressure even when exposed to pressure. It becomes possible to take out the roughness and measure the roughness.

In the invention described in claim 2, the roughness measuring auxiliary box has a structure that can be easily installed on the surface of the propeller, so that the space required for the roughness measurement can be created on the surface of the propeller in water, and the roughness meter Is not used in water, but can be used in aerial conditions in water although it is pressurized.

Further, in the invention described in claim 2, by using the roughness measuring auxiliary box, a contact-type roughness meter that cannot be used in water is applied under pressure by forming a midair in the measuring section of the underwater propeller section. However, it can be used underwater.

The underwater propeller polishing machine of this equipment is equipped with a peeled material recovery device that can prevent environmental pollution and shorten maintenance and maintenance time. Water containing fine powder exfoliation that takes a long time is sucked up by a pump, filtered with a filter, separated into water and exfoliation, and even fine powder exfoliation can be collected in a short time

In addition, the exfoliation recovery device can be easily attached to the polishing machine with an attachment, and the exfoliation recovery machine is equipped with a exfoliation diffusion prevention brush and exfoliation suction plate to recover exfoliation that is blown around by a rotating disk. The anti-diffusion brush prevents the exfoliation material from diffusing to the outside of the exfoliation recovery device, and it can be attached to the underwater propeller polishing machine with a simple tool. Even when the peeled material does not need to be collected without being discharged, it can be easily removed and maintenance work can be performed efficiently.

According to the first aspect of the present invention, it becomes possible to maintain and manage the propeller without putting the ship in service into the dock, and exhibits the following excellent effects. None of these were possible with the prior art.

When this underwater maintenance facility is used , a diver that performs propeller polishing in a swinging water propeller and a swinging water propeller can easily operate the underwater propeller polishing machine. The underwater propeller polishing machine generates negative pressure by rotating with a specially structured polishing disk and adsorbs it to the propeller itself, which improves the maneuverability of the underwater propeller polishing machine, and the underwater propeller polishing machine moves to slide on the surface of the propeller become. Rather than pressing the underwater propeller polishing machine against the propeller to polish it, the underwater propeller polishing machine itself adsorbs and slides on the propeller while rotating, so the diver only moves the polishing machine against the propeller surface in any direction Makes stable polishing work possible

In addition, the propeller that performs underwater polishing has a curved surface and the curved surface is particularly large in the vicinity of the propeller axis.If the polishing disk is sucked onto the propeller and then propeller polished in a stable state in water, the roughness of the polished finish is average. But the Ra0.5μm below. Polishing with a roughness of Ra of 0.3 μm or less can be performed at a portion where the propeller efficiency is high in a portion close to a flat surface with few curved surfaces from the center of the propeller. In particular, when the surface of the propeller is polished to a roughness of Ra of 0.5 μm or less, the performance of the propeller is increased, and it takes several months for the propeller surface to become dirty.

When using this underwater maintenance facility, comparing the case of only cleaning to remove dirt and the case of polishing to Ra1μm or less, there will be a big difference in the landing situation of the deposit , especially when polishing to Ra1μm or less Propeller performance can be maintained in good condition for several months. Underwater propeller polishing is a method that can improve the performance of the propeller at the time of manufacture, especially with a propeller that is rotating without break, it is more difficult to adhere to the deposit for more than several months, and the performance is better It will be maintained for a long time. Furthermore, this is a propeller polishing machine that also increases the effect of fuel reduction.

For equipment that measures the roughness of this submersible maintenance facility, a roughness meter that measures roughness in water can be created by using a roughness measurement auxiliary box and a pressure box. Since it can be measured in the roughness measurement box that is in the air in the box, it can be measured by creating a pressure box and a roughness measurement auxiliary box without developing a new underwater roughness meter. It becomes possible to measure the degree.

Using this underwater maintenance facility, the roughness of a ship's propeller can be expressed numerically in water. If the surface roughness of the propeller can be confirmed numerically, the state of the propeller can be confirmed and maintenance of the propeller can be performed. The closer the surface roughness of the propeller is to Ra 0 μm , the better the performance. When comparing only cleaning to remove dirt and polishing to Ra 1 μm or less, there is a great difference in the landing situation of the landing object. When propellers are polished in water to Ra 1 μm or less, the propeller performance can be maintained in good condition for several months. Until now, even if the propeller was polished in water, the roughness could not be measured. In addition, the Rupert gauge with which the roughness can be compared has only six standards of A to F, and these are also judged by comparison with tentacles and images. The underwater propeller polishing machine according to claim 1 can polish to a roughness within Ra 1 μm to Ra 0.01 μm , and can be confirmed by the inventions according to claims 2 and 3 . This makes it possible not only to check the roughness at the end of propeller polishing, but also to maintain and manage the propeller with the roughness value of the propeller surface.

In the present invention, an inexpensive and easy-to-use roughness meter can be made. There are two types of roughness meters: contact roughness meters and non-contact roughness meters. Each roughness meter has its advantages and disadvantages. Non-contact type roughness meter is expensive and requires a large amount of equipment, and there are many problems that are disadvantageous not only in price but also in carrying, but the contact type roughness meter is small, so it is suitable for placing in a pressure-resistant box that can be carried. Yes.

Some of the arithmetic units of contact-type roughness meters use capacitance. Capacitance cannot be used under pressure, so it can be used even if it is brought into water by placing the computing unit in a pressure-resistant box and bringing it to atmospheric pressure.

The measuring part of the contact-type roughness meter has a structure in which the stylus part moves and measures. It is difficult to waterproof the movable part so that it can move without any trouble. For this reason, the roughness measurement auxiliary box is used for measurement, and by placing it in a pressure-resistant box that can open and close the roughness meter stylus, it can be brought into the roughness measurement auxiliary box and brought into the roughness measurement box. It can be done in the measurement auxiliary box. Contact type roughness that can be carried at low cost by separating the calculation unit and the measurement unit that can measure even under pressure when the capacitance is used with a contact type roughness meter that does not extend the cable for a long time, and putting it in a pressure resistant box that compensates for each defect The gauge can be used, and the roughness of the propeller of the moored ship can be measured in water.

Furthermore, in order to improve the functions of the underwater roughness meter, the pressure box of the calculation unit of the underwater roughness meter is maintained at atmospheric pressure and has a function that can be operated from outside the water, and the display section also has a function that can be read underwater. The pressure box of the section can be equalized with the external pressure by the functions of the pressure adjusting valve and the check valve even during pressurization and negative pressure, and the lid can be opened and closed even under pressure in the roughness measurement auxiliary box.

The exfoliation recovery machine can be easily attached to and removed from the underwater propeller polishing machine. When there is almost no exfoliated material and it is not necessary to collect the exfoliated material, it can be removed and the polishing process can be simplified. In addition, the exfoliated material storage device settles the exfoliated material, so most of the exfoliated material is separated from water It accumulates in the lower part of the material storage device and is easy to recover.

The minute exfoliated material takes time to settle naturally and must wait for sedimentation even after the polishing operation is completed, and it takes a considerable amount of time to withdraw after completion of the operation, which may hinder the operation of the ship. It is possible to collect the sediment early by using a precipitating agent, and when there is still no time for the recovery, remove the non-sedimented debris in the exfoliated substance storage device with the fine exfoliated substance collecting device. By collecting and processing simultaneously with the water in the material storage device, the work completion time can be shortened and the influence on the operation of the ship can be reduced.

Also, by attaching a peeled material recovery device equipped with a peeled material diffusion prevention brush and a peeled material suction plate to the polishing machine, the scraps generated when polishing the propeller surface and the exfoliated material of marine deposits are not discharged into the sea. Then, it becomes possible to easily recover the exfoliation storage device on the surface of the water by suction with a negative pressure.

The present invention measures the roughness of a propeller of a moored and anchored ship without putting the ship into a dock and polishes the diver using an underwater propeller polishing machine according to the roughness condition to improve the propeller performance. I can do it. Also, because propeller polishing can be performed in a short time during mooring and berthing, there is no major hindrance to the operation, and underwater maintenance work using underwater polishing and underwater roughness measurement of ship propellers with a small number of personnel in a short time. Can be constructed and the performance of the propeller can be maintained.

Since the underwater maintenance facility for the ship propulsion device of the present invention is a small-scale facility, it is easy to move, and it is possible to carry in and carry out the polishing materials and equipment with a single car of the size of a regular freight vehicle. It is composed of equipment that can be loaded on one base, and can be transported without requiring heavy machinery, so it can be carried out at a ship mooring point and can be maintained and maintained so as not to hinder the operation.

The object of the present invention is a ship propeller that is a wall surface. However, if the object is a wall surface and ceiling that require polishing and roughness measurement in water, this technique can be applied to polish in water. And it can be used to measure the roughness and confirm the polishing situation.

Conceptual diagram of underwater special polishing of propeller underwater Conceptual diagram of structure of underwater propeller polishing machine Conceptual diagram of measuring roughness using an underwater roughness meter Enlarged view of the conceptual diagram measuring roughness in water Schematic diagram of the cross section of the roughness measurement auxiliary box that will be the underwater roughness measurement chamber Conceptual diagram of the front of the roughness measurement auxiliary box that becomes the underwater roughness measurement room Underwater roughness meter conceptual diagram Enlarged view of the underwater roughness meter measuring unit conceptual diagram Fuel efficiency data based on propeller blade surface roughness

FIG. 1 is a conceptual diagram showing that the underwater polishing of the surface of the propeller is performed from the quay in water. The monitoring staff and workers assist the diver at the equipment installation position on the surface of the water. Manage and operate equipment. Hose of reference numeral 9 so that the worker operates the power generator for the underwater propeller polishing machine indicated by reference numeral 10 and the power generated by the power generation apparatus for the underwater propeller polishing machine indicated by reference numeral 10 does not hinder the polishing operation. Power is sent to the underwater propeller polishing machine of the reference number 1 using the polishing machine power transmission cable or hose of the reference number 7 installed using the anti-settling buoyancy body. FIG. 3 is a conceptual diagram in which an underwater propeller polishing machine of No. 1 is operated by receiving the power, and polishing is performed by rotating a polishing disk to which a polishing disk containing an abrasive is attached.

Reference numeral 1 shown in FIG. 1 is an underwater propeller polishing machine. The weight of the polishing diver 19 can be held by hand, and the polishing disk is rotated at a rotational speed of 1000 rpm to 10000 rpm under an operating pressure of 8 MPa to 50 MPa that does not decrease the speed even when pressed against the propeller. 6 has a function capable of polishing the surface of the propeller between Ra 1 μm and Ra 0.01 μm . Further, the polishing disk portion of the underwater propeller polishing machine of No. 1 has a diameter of 50 cm to 5 cm, and has a performance capable of adhering to a propeller having a curved surface and polishing the propeller surface without hindrance. It is an underwater propeller polishing machine.

The code | symbol 3 shown in FIG. 1 is a peeled material collection | recovery machine. The exfoliated material exfoliated from the surface of the propeller during polishing by the underwater propeller polisher 1 is scooped up at the bent portion of the recovery device front end cover, and the exfoliated material and water discharged to the outside by centrifugal force using the rotation of the polishing disc It is a structure that can be attached to and detached from the underwater propeller polishing machine 1 with a simple tool. Further, the peeled material and water are sucked into the collection hose by the suction pump of the peeled material collecting negative pressure generator 11 or the finely peeled material collecting device 5, and the peeled material storage device 4 is provided on the water surface. It is a stripped material recovery device that can be recovered.

The code | symbol 4 shown in FIG. 1 is a peeled material storage apparatus. It is made of a water-permeable cloth-like bag and is installed on the water surface using a buoyant body or a hanging device. Since it is in the form of a bag, it can be easily installed even with a size of about 4 m × 4 m × 5 m, and it is equipment that can store exfoliated material and water of about 80 tons. A peeled material having a function of settling the collected material sent simultaneously with water by the peeled material collecting machine of reference number 3 and a function of draining the separated water, and collecting only the separated and settled material after polishing. It is a storage device. Further, the exfoliated substance storage device 4 also has a function of using a precipitating agent to settle and recover the exfoliated material that does not settle immediately.

The code | symbol 5 shown in FIG. 1 is a micro peeling material collection apparatus. It is an apparatus which collect | recovers the fine exfoliation objects which do not fully settle among the collect | recovered exfoliation objects in the exfoliation substance storage device of the code | symbol 4, without waiting for sedimentation. Using the suction hose numbered 8, the fine peeled material and water were collected from the peeled material storage device numbered 4, filtered by the fine peeled material collection device numbered 5, and the water was returned to the water. It is an apparatus which can collect | recover in a micro peeling material collection apparatus.

The code | symbol 6 shown in FIG. 1 is the propeller of the ship in service. During service, the propeller section is always submerged in the water. The shape of the propeller varies depending on the ship, and it is composed of a curved surface with its own twist. The central root part has a large twist and bend.

Reference numeral 19 shown in FIG. 1 is a polishing diver performing propeller polishing. Power is received from an underwater propeller polishing machine power generator, and the surface of the propeller 6 is polished by manually operating the underwater propeller polishing machine 1.

Reference numeral 7 shown in FIG. 1 is a polishing machine power transmission hose of an underwater propeller polishing machine. (Although some power uses electricity, water flow, air, and oil pressure, the device of this description is described as a transmission hose because it is assumed to be a hydraulic power device.) Power generator for underwater propeller polisher 10 It is a power transmission hose which has the capability to send the power of the working pressure between 8MPa and 50MPa which generate | occur | produced in (1) to the underwater propeller polisher of the code | symbol 1.

Reference numeral 8 shown in FIG. 1 is a suction and water discharge hose. From the hose that can collect the peeled material together with water from the peeled material collecting machine 3 directly, and the peeled material storage device 4, when there is little peeled material (when recovery is necessary in the second and subsequent polishing) These are a hose that collects the exfoliated material that has not settled and sends it to the fine exfoliated material recovery device 5, and a hose that returns clean water as residual water.

Reference numeral 9 shown in FIG. 1 denotes a hose sedimentation preventing buoyancy body. The hose 9 is used in the water to prevent the sinking work from sinking or to be lifted so that the polishing work can be performed without any trouble and stays in an easy-to-operate position. In order to check the position of each hose, and to prevent the hoses from getting tangled, an anti-settling buoyant body can be attached to the hose to make it neutral and float on the water surface.

Reference numeral 10 shown in FIG. 1 is a power generator for an underwater propeller polishing machine. Ability to send power of working pressure between 8MPa and 50MPa to submersible propeller polisher with hydrodynamic power generator that makes high torque and high rotation using polisher power transmission hose of reference 7 to submersible propeller polisher of reference 1 have. (An electric motor can also be used for the rotating device)

The code | symbol 11 shown in FIG. 1 is the negative pressure generator for a separated material collection | recovery. It is a device that can generate a negative pressure by using various powers such as a negative pressure due to air levitation and suction by a pump, and can suck a peeled material.

FIG. 2 shows the operation of the underwater propeller polishing machine 1 shown in FIG. Rotating power is obtained from a polishing machine power transmission hose indicated by reference numeral 7, and the rotating part of a polishing machine motor indicated by reference numeral 14 of an underwater propeller polishing machine indicated by reference numeral 1 is rotated by that power, and an abrasive indicated by reference numeral 12 attached to the tip of the rotating part. It is the figure which expanded the conceptual diagram which rotates an entering grinding | polishing disk at high speed, generate | occur | produces a negative pressure, and makes a grinding machine adsorb | suck to a propeller, and is grind | polishing the surface of a propeller.

Reference numeral 12 shown in FIG. 2 is an abrasive-containing abrasive disc. The polishing disc is a polishing pad containing a harder abrasive material than the propeller and made of a material having water permeability and elasticity, and the surface of the propeller is rotated at a high speed between 1000 rpm and 10,000 rpm in water. When polishing, the surface of the propeller can be polished to a roughness of Ra1 μm to Ra0.01 μm by polishing the surface of the propeller with the pad of the polishing disk denoted by reference numeral 12 using the exfoliated material containing the propeller polishing waste and water as an abrasive. With performance. Also, the abrasive disc of No. 12 has a wide cylindrical donut shape or disk shape, has thickness, flexibility or cushioning and a certain degree of water permeability, and has a depression at the center. This is a polishing disk containing an abrasive having a feature that a negative pressure is likely to be generated when the water in the inside comes out of the polishing disk.

Reference numeral 13 shown in FIG. 2 is a negative pressure generating portion caused by high-speed rotation of the polishing disk. Inside the underwater propeller polishing machine indicated by reference numeral 1, the polishing machine motor indicated by reference numeral 14 that receives power from the polishing machine power transmission hose indicated by reference numeral 7 rotates the polishing disk containing the abrasive indicated by reference numeral 12 at a high speed, thereby rotating the underwater propeller indicated by reference numeral 1. The water in the negative pressure generating portion of the polishing machine 13 passes through the pad of the polishing disk 12 and is released to the outside by centrifugal force. Since the negative pressure generating part of reference numeral 13 becomes negative pressure and the underwater propeller polishing machine of reference numeral 1 is adsorbed by the propeller of reference numeral 6, the polishing operation is facilitated.

Reference numeral 14 shown in FIG. 2 is a polishing machine motor. A polishing disk with a reference numeral 12 having elasticity and water permeability in water is attached, and the polishing disk is subjected to an operating pressure between 8 MPa and 50 MPa in water and the polishing disk is subjected to an operating pressure of 8 MPa to 50 MPa at a high speed within 1000 rpm to 10,000 rpm. This is a polishing machine motor having the ability to rotate the outer periphery of the polishing disk.

Reference numeral 15 shown in FIG. 2 is a delamination diffusion preventing brush. The protection for preventing the peeled material collecting apparatus of reference numeral 3 from damaging the surface of the propeller of reference numeral 6 and the prevention of spreading of the peeled object due to the rotation of the abrasive disk containing the reference numeral 12 and the negative load for recovering the peeled object of reference numeral 11 There is a function of sucking water from the outside of the polishing machine by the negative pressure suction device of the pressure generator. Shown in the figure is a brush made of a material softer than the propeller denoted by reference numeral 6. If the structure is made of a softer material than the propeller and prevents the peeled material from diffusing and sucks water, the form is not limited to a brush.

Reference numeral 16 shown in FIG. 2 is a peeled material suction plate. By rotating the polishing disk, the water and exfoliated material discharged by centrifugal force are applied to the suction plate installed diagonally and taken inside the polishing machine and exfoliated material recovery device to suppress the diffusion of the exfoliated material. By using centrifugal force, most of the exfoliated material mixed with water can be recovered.

The code | symbol 17 shown in FIG. 2 is a fine powder grinding | polishing waste and a peeled material. Fine powdered scraps and exfoliated material 17 separated from the polishing pad are aspirated by the exfoliated material collecting machine 3 by negative pressure generated by the suction and discharge hose 11 or the negative pressure generator 11 for collecting exfoliated material. The water and the collected material pass through the peeled material collecting machine 3 and are sucked into the suction hose. The flow of water inside and outside of the polishing machine and the flow of exfoliated material are indicated by arrows.

FIG. 3 is a conceptual diagram in which the inspection diver 22 measures the surface roughness of the propellers of the mooring and mooring vessel. An inspection diver 22 is used to measure roughness using a roughness measuring auxiliary box 18 and an underwater roughness meter 2. An inspection assistant diver 23 takes a picture of the inspection state with an underwater video camera 20 and sends it to the ship. Also, the attendant of the reference numeral 24 through the monitor TV of the reference numeral 21 on the work ship of the reference numeral 25, the roughness measurement location and the measurement situation, and the roughness of the roughness display portion of the reference numeral 33 of the underwater roughness meter of reference numeral 2 It is a figure which is confirming a numerical value.

Reference numeral 18 shown in FIG. 3 is a roughness measurement auxiliary box. The auxiliary roughness measurement box 18 attached to the surface of the propeller 6 with a suction device 30 has a structure in which the propeller measurement surface and the lower part are open, and has strength to withstand pressure differences and buoyancy with the outside. The interior has a structure that allows gas to accumulate. The roughness measurement auxiliary box 18 is made of a material that can be seen from the outside, so that the roughness measurement diver can measure the roughness while checking the roughness measurement status.

Reference numeral 2 shown in FIG. 3 is an underwater roughness meter. It has waterproof and pressure resistant capability to withstand water pressure of 30m depth. A portable contact-type roughness meter used on land is divided into a calculation unit and a measurement unit and placed in a pressure-resistant box, and is connected by a pressure-resistant cable of 36 through a pressure transmission prevention connector of reference numeral 37. Roughness meter calculation unit of code 32 The roughness meter calculation unit of code 35 of the pressure-resistant box can be operated from the outside by using a roughness meter operating device of code 34 in water, and the roughness can be confirmed in the roughness display portion of code 33. The pressure gauge box of the roughness meter measuring unit with reference numeral 38, which is a structure that can be opened and closed at the part of the air that is in the air of the roughness measuring auxiliary box of reference numeral 18 installed on the propeller in the water, The needle part is a roughness meter having a function that can be operated even under pressure.

Further, the underwater roughness meter of No. 2 is an underwater roughness meter that can measure roughness using an auxiliary box for roughness measurement of No. 18 in water, but it can be used not only in water but also in the aerial part and within 4 atm. If it is under the pressure of, it has the characteristic which can measure roughness as a portable roughness meter. In addition, by increasing the pressure resistance function of the pressure box, measurement under higher pressure can be performed. However, even in the case of a propeller of a large ship, the deepest position is within 30 m of the water core, so it is an underwater roughness meter that does not hinder the measurement of the roughness of the propeller.

Reference numeral 20 shown in FIG. 3 is an underwater video camera. It has a function that can send the image of the roughness measurement underwater to the monitor television of reference numeral 21 to the witness of reference numeral 24 on land.

Reference numeral 21 shown in FIG. 3 is a monitor television. The underwater video camera denoted by reference numeral 20 has a function that allows an witness denoted by reference numeral 24 to check the roughness measurement status being performed underwater.

Reference numeral 22 shown in FIG. 3 is an inspection diver. This is an inspection diver who has the skill to measure the roughness of the surface of the propeller using the underwater roughness meter of 2 and the roughness measuring auxiliary box of 18.

Reference numeral 23 shown in FIG. 3 is an inspection auxiliary diver. It is a diver that assists the inspection diver and can photograph the roughness measurement assistance and the inspection status.

Reference numeral 24 shown in FIG. 3 is a witness. The measurement of roughness of the propeller look at the monitor TV of water above the indicated numeral 21 the situation has been confirmed record.

The code | symbol 25 shown in FIG. 3 is a work ship. If it is possible to load the underwater propeller polishing equipment is a small ship with a capacity can also be used to divers working at the same time.

The code | symbol 26 shown in FIG. 3 is the ship which floats on the water surface, and the propeller of the own ship is polished underwater.

FIG. 4 is an enlarged view of the roughness measurement situation of FIG. 3 and is a conceptual diagram in which the roughness is measured using the roughness measurement auxiliary box 18 and the roughness meter 2. The inspection diver with the reference numeral 22 uses the roughness measuring auxiliary box with the reference numeral 18 installed at the measurement position on the surface of the propeller under the same pressure as the surroundings, and the underwater roughness meter with the reference numeral 2 is used as the pressure box. Bring it into the water in a state where it is put in, and bring the roughness meter measuring unit 39 into the roughness measuring auxiliary box 18 with the roughness meter measuring unit 38 in the pressure box, and measure the roughness. The measurement unit lid of reference numeral 43 is opened, the roughness meter stylus part of reference numeral 40 of the roughness meter measurement part of reference numeral 39 is applied to the surface of the propeller, and the roughness meter operation of reference numeral 34 of the roughness meter calculation part of reference numeral 32 is operated. Using the device (Before measurement, confirm that the underwater roughness meter No. 2 operates normally with the No. 27 reference roughness plate installed in the No. 18 roughness measurement auxiliary box in advance. ) The roughness of the surface of the propeller denoted by reference numeral 6 is measured. It is the conceptual diagram which the inspection auxiliary | assistant diver of the code | symbol 23 is sending the image | video to the monitor television of the code | symbol 21 on the water using the underwater video camera of the code | symbol 20 about the measurement condition.

Reference numeral 27 shown in FIG. 4 is a reference roughness plate. It is installed in a roughness measurement auxiliary box 18 so that it can be confirmed immediately before the roughness measurement whether the underwater roughness meter 2 brought into the water is operating normally.

In order to use the measuring unit of the contact-type roughness meter in water, an aerial part in which the stylus part can operate is required in water. There is a diving bell (a submersible canopy type with a bottom open and a diver can enter and exit from the bottom so that the diving bell is filled with air). However, a diving bell is a large one that a person can put inside, and an opening is provided only in the bottom part facing downward, and it is shaped like a bowl or a box. (The diving bell is used to take a break or decompression when a diver enters underwater.)

When measuring the roughness of a propeller in water, the side surface is vertical. When measuring the roughness using a diving bell structure, it is necessary to cover the entire propeller of the measuring unit, but this is not possible. Propeller measurement in water Roughness meter side side (propeller surface direction) and lower part has an opening, different shape from diving bell, can make aerial part in water The roughness measurement auxiliary box is required.

The roughness measurement auxiliary box has a structure in which after being installed on the propeller surface, gas is introduced into the interior and water is excluded. Due to such a structure, the buoyancy works by the volume of the gas contained in the roughness measurement auxiliary box and tries to leave the installation surface. There is a method of using a weight to fix the roughness measurement auxiliary box. There is a method of attaching a weight from the beginning and a method of attaching a weight later. Further, since the roughness measurement auxiliary box is about to be separated from the installation surface, it is necessary to take measures for preventing the separation.

5 and 6 describe a method in which a suction device is used to fix the roughness measuring auxiliary box 18. Since the roughness measuring auxiliary box is sucked and fixed in such a manner as to be pressed against the propeller, it is possible to simultaneously take measures to prevent floating and separation. The surface of the propeller to be adsorbed may be dirty before polishing, but even if it is dirty, the roughness measuring auxiliary box can be installed by cleaning the adsorbing surface.

5 and 6 are reference conceptual diagrams of the roughness measuring auxiliary box 18. As an example, it is 400mm x 600mm x 300mm, and the buoyancy is about 72kg. Propeller roughness measurement dedicated box for measuring roughness (changeable depending on measurement conditions and roughness meter). It has a structure that is easy to install and measure roughness, and is made of strength and material that will not break even under external pressure or buoyancy in water. The propeller measurement surface side and the lower side are open, and after installation, the internal water can be discharged from the lower side, and the propeller measurement surface side can prevent air leakage and water infiltration.

Further, the surface of the propeller denoted by reference numeral 6 is a twisted curved surface. It is difficult to manufacture the contact surface of the roughness measurement auxiliary box 18 with a twisted curved surface of the propeller. By using a special material that has a cushioning property and a little strength like neoprene rubber, it is possible to cope with a slightly curved surface, but the shape of the curved surface changes with each measurement position. The roughness measuring auxiliary box has a confronting structure. In order to fill the gap between the face of the propeller contact portion of the roughness measurement auxiliary box of reference numeral 18 and the curved surface of the propeller surface to secure a space, an air leakage stopper packing of reference numeral 28 and a curved auxiliary water stop material of reference numeral 29 are used, The roughness measuring auxiliary box 18 is fixed by a suction device 30 that can adjust the length and angle of the fixing bolt .

Reference numeral 28 shown in FIG. 5 is an air leakage prevention packing. It is made of a soft material that is not breathable, and the air leak-proof packing 28 is pressed against the surface of the propeller 6 by the gas fed into the roughness measurement auxiliary box 18 so that the 18 Prevents leakage of gas and water from other than the bottom of the roughness measurement auxiliary box.

The code | symbol 29 shown in FIG. 5 is a curved surface auxiliary | assistant water stop material. Made of flexible material that does not shrink too much. The propeller surface is entirely curved, but if it is a small curved surface, it can cope with gas leakage and water leakage with the air leakage prevention packing of 28. However, when the gap between the curved surface and the curved surface is large, the air leak-proof packing of reference numeral 28 made of a soft material is sucked into the gap, gas is sucked out, and water enters. By using a curved surface auxiliary waterproofing material of reference numeral 29 that has a non-shrinking property, flexibility, and thickness adjustment, the gap between the curved surface of the propeller of reference numeral 6 and the roughness measurement auxiliary box of reference numeral 18 is reduced. It is a curved auxiliary water-stopping material having a gap that can prevent gas leakage even with the air leak-proof packing of reference numeral 28.

The code | symbol 30 shown in FIG. 5 is an adsorption | suction apparatus. This is a suction device having a function capable of installing the roughness measurement auxiliary box of reference numeral 18 on the propeller of reference numeral 6. It is attached to a roughness measurement auxiliary box 18 and is attached to a propeller. The roughness of the propeller of reference number 6 is not limited to the roughness that can be adsorbed by the adsorption device of reference number 30. The roughness of the propeller surface is poor and the adsorption device may not suck. Only a portion to be adsorbed by the adsorbing device 30 is cleaned and adsorbed, and a roughness measurement auxiliary box 18 is installed.

Reference numeral 31 shown in FIG. 5 is an open portion at the bottom of the roughness measurement auxiliary box. This portion, which is the lower part of the roughness measuring auxiliary box 18, is opened, and gas is fed into the roughness measuring auxiliary box 18 from the opening 31, and the roughness measuring auxiliary box 18. The inside drains water from the lower portion of the reference numeral 31 as much as the sent gas accumulates, and the inside is filled with gas and is in a state without water. Using this part, the diver serves as an inlet / outlet for putting the roughness measurement auxiliary pressure box 18 in the air in the air in the roughness measurement auxiliary box 18 in the air.

FIG. 6 is a front view of the roughness measurement auxiliary box 18. FIG. 6 is a reference diagram of the same structure as the side view of FIG. 5.

FIG. 7 shows a portable contact-type roughness meter whose cable cannot be extended to land. It is divided into a roughness meter calculating unit 35 and a roughness meter measuring unit 39, and each is placed in a pressure-resistant box to prevent pressure transmission 37. It is the conceptual diagram which connected the roughness meter calculating part of the code | symbol 35, and the roughness meter measurement part of the code | symbol 39 with the pressure | voltage resistant cable of the code | symbol 36 using a connector.

The code | symbol 32 shown in FIG. 7 is a roughness meter calculating part pressure | voltage resistant box. The roughness meter computing unit 35 is placed in a pressure box under the atmospheric pressure with the roughness meter computing unit pressure box 32 and has a pressure-resistant waterproofing function that can be used even at a depth of 30 m. Even under pressure in water, the roughness meter measuring unit 39 can be operated in water using the roughness meter operating device 34 without being affected by external pressure. This is a pressure gauge box for the roughness meter calculation unit, which can confirm the display measured by the roughness meter measuring unit with reference numeral 39 in water from the outside.

Reference numeral 33 shown in FIG. 7 is a roughness display portion of the roughness meter calculation unit. It has a feature that the roughness display portion of the roughness meter calculation unit 35 can be read from the outside.

Reference numeral 34 shown in FIG. 7 is a roughness meter operating device. It has the function of operating the operating device of the roughness meter computing unit indicated by reference numeral 35 inside the pressure box from the outside of the pressure box with the operating device of the roughness meter computing unit in water.

The code | symbol 35 shown in FIG. 7 is a roughness meter calculating part. Even if it is protected by a pressure-resistant box, it is in an atmospheric pressure state, and even a structure that cannot cope with pressure changes such as capacitance operates normally because it maintains the atmospheric pressure. Further, a roughness meter measuring unit 39 is connected to a roughness meter measuring unit 39 by a pressure-resistant cable 36 through a pressure transmission preventing connector 37.

The code | symbol 36 shown in FIG. 7 is a pressure | voltage resistant cable. An operation signal and a reference numeral 39 are supplied from the roughness meter calculation section 35 by a pressure cable connecting the pressure transmission prevention connector 37 of the roughness meter calculation section pressure box 32 and the roughness meter measurement section pressure box 38. It is a cable that can transmit the data signal measured by the roughness meter measuring unit without error.

Reference numeral 37 shown in FIG. 7 is a pressure transmission preventing connector. This connector has the ability to block pressure, and is attached to the roughness meter calculation section pressure box 32 and the roughness meter measurement section pressure box 38. The pressure transmission prevention connector is a connection connector having a characteristic of transmitting an electrical signal but not transmitting pressure and water. The roughness meter measuring unit 39 is in a pressurized state in the roughness measuring auxiliary box 18. When this pressurized pressure is transmitted from the pressure transmission preventing connector 36 to the roughness meter calculator 35 via the pressure cable 36, the roughness meter calculator 35 using the capacitance operates normally. There is a high possibility of disappearing. The pressure preventing connector 37 has a function to prevent this.

The code | symbol 38 shown in FIG. 7 is a roughness meter measurement part pressure | voltage resistant box. It has a structure and strength that can cope with pressure changes up to a depth of 30m. The measurement unit lid of reference numeral 43 is opened and the roughness meter measurement part of reference numeral 39 can be taken out, and the stylus probe part of reference numeral 40 is not removed from the pressure-resistant box by simply removing the measurement part opening cover of reference numeral 43. It is also possible to measure roughness.

The code | symbol 39 shown in FIG. 7 is a roughness meter measuring part. Underwater, it is protected by a pressure gauge box 38 for measuring the roughness meter, and has a function of measuring the roughness in the air under pressure of the roughness measuring auxiliary box 18.

The code | symbol 40 shown in FIG. 7 is a roughness meter stylus part. There is a function in which roughness can be measured by operating without difficulty in the roughness measurement auxiliary box 18 in the air under pressure.

Reference numeral 41 shown in FIG. 7 is a pressure regulating valve. A roughness measuring auxiliary box designated by reference numeral is opened by opening a pressure regulating valve designated by reference numeral 41 in the air of the auxiliary roughness measuring box designated by reference numeral 18 by a diver attached to the pressure gauge box designated by reference numeral 38. The pressure inside the roughness measuring section pressure box of 38 and 38 is equalized, and the measuring section lid of reference numeral 43 can be easily opened and closed in the air under pressure of the roughness measuring auxiliary box of reference numeral 18. In addition, after the measurement is completed, the measurement unit lid of reference numeral 43 is closed and the pressure adjustment valve of reference numeral 41 is closed, so that the water can be prevented from entering even if it is taken out from the roughness measurement auxiliary box of reference numeral 18.

Reference numeral 42 shown in FIG. 7 is a check valve. It is attached to the pressure regulating valve 41 or the roughness meter measuring section pressure box 38, so that the external pressure and water can be prevented from entering. After the roughness measurement is completed, the pressure gauge box 38 of the roughness meter measuring unit is closed under pressure and is in a pressure state at a closed water depth. The surrounding pressure decreases as the inside of the pressure measuring box of the roughness measuring section 38 under pressure is directed toward the water surface. When the pressure inside the pressure box becomes higher than the outside, the check valve 42 has a function of automatically reducing the pressure inside the pressure box so as to be the same as the external pressure. By the function of the check valve 42, the inside of the roughness meter measuring section pressure box 38 is always kept at the same or lower level as the external pressure, and the roughness meter measuring section pressure box 38 is not expanded. The check valve 42 has a function. (Normal pressure box structure is strong against pressurization, but tends to be very weak against expansion resulting in reverse pressure)

The code | symbol 43 shown in FIG. 7 is a measurement part cover. Although it is attached to the pressure gauge box 38 of the roughness meter measuring section, it can be provided with a function of measuring the roughness by showing only the stylus part to be measured.

FIG. 8 is an enlarged view of the roughness meter measuring unit 39, which is placed in the pressure box of the roughness meter measuring unit 38. The situation in which the pressure-resistant cable 36 is connected to the roughness meter measuring section 39 in the roughness box measuring section 38, through the pressure transmission preventing connector 37, and the roughness 38 FIG. 4 is a conceptual diagram in which a meter measuring unit pressure box, a roughness meter stylus part with reference numeral 40, a lid with a measuring part with reference numeral 43, a pressure regulating valve with reference numeral 41, and a check valve with reference numeral 42 are arranged.

FIG. 9 is a reference data of fuel efficiency according to the roughness of the propeller surface. If the roughness is Ra 2 μm or less, almost no fuel loss occurs, but if it exceeds this, fuel loss appears and efficiency begins to drop. This is a reference material in which significant fuel loss occurs when Ra exceeds 30 μm .

Maintenance and inspection of propeller propellers, which could not be done without prior docking, can now be easily performed during service, and fuel for ships can be reduced.

DESCRIPTION OF SYMBOLS 1 Underwater propeller polisher 2 Underwater roughness meter 3 Exfoliated material collection machine 4 Exfoliated material storage device 5 Fine exfoliated material collection device 6 Propeller 7 Polishing machine power transmission cable or hose 8 Suction and water discharge hose 9 Hose sedimentation prevention buoyant body 10 Underwater Power generator for propeller polishing machine 11 Negative pressure generator for recovery of peeled material 12 Polishing disk with abrasive 13 Negative pressure generator by polishing disk high-speed rotation 14 Polishing machine motor 15 Stripping material diffusion prevention brush 16 Stripping material suction plate 17 Fine powder 18 Polishing scrap 18 Roughness measurement auxiliary box 19 Polishing diver 20 Underwater video camera 21 Monitor TV 22 Inspection diver 23 Inspection auxiliary diver 24 Witness 25 Work ship 26 Ship to be measured 27 Standard roughness plate 28 Air seal packing 29 Curved auxiliary stop Water material 30 Adsorber 31 Opening part at the bottom of dry box 32 Degree meter computing unit breakdown voltage box 33 roughness display portion
34 Roughness meter operation device 35 Roughness meter calculation unit 36 Pressure-resistant cable 37 Pressure transmission prevention connector 38 Roughness meter measurement unit Pressure-resistant box 39 Roughness meter measurement unit 40 Roughness meter stylus part 41 Pressure adjustment valve 42 Check valve 43 Measuring unit lid

Claims (3)

An underwater maintenance facility that can maintain and manage ship propellers underwater. The underwater polisher that can polish the propeller surface of a ship propulsion device underwater while moored is portable, and the polishing disc is a material with water permeability and elasticity. With a depression at the center, receiving a working pressure of between 8 MPa and 50 MPa and rotating at a high speed of 1000 rpm to 10,000 rpm, the polishing surface is brought into contact with negative pressure, and the polishing surface is between Ra 1 μm and Ra 0.01 μm It is equipped with an underwater polishing machine capable of polishing the surface and a roughness measurement facility that can determine the propeller performance by measuring the roughness with the roughness measurement part of the surface of the propeller in water as the air. Maintenance equipment. The roughness measuring equipment capable of measuring the roughness with the roughness measuring unit of the propeller in water described in claim 1, the roughness measuring auxiliary box attached to the roughness measuring surface in water and the inside is in the air A roughness meter that can measure the roughness of the propeller in the roughness measurement auxiliary box that is in the air, and the roughness meter can be protected and brought into the water and taken out in the roughness measurement auxiliary box An underwater maintenance facility comprising a pressure-resistant box that can be used. The pressure-resistant box of the roughness measuring facility capable of measuring the roughness in the aerial part in the water described in claim 1 is capable of responding to an external pressure change, and is in the aerial part of the auxiliary roughness measuring box. The roughness meter measuring part can be taken out with the cable, the calculation part and measuring part of the roughness meter are connected with a cable through the pressure transmission prevention connector installed in the pressure box, and the measuring part of the roughness meter is pressurized An underwater maintenance facility characterized in that the roughness measurement can be performed in the roughness measurement auxiliary box, and the measured numerical value can be sent to the arithmetic unit through a cable.

Images