Ultrasonic cleaning system for MR oil tanker propeller

Abstract

The invention relates to the technical field of propeller cleaning, in particular to an MR oil tanker propeller ultrasonic cleaning system which comprises a cleaning mechanism, a purifying mechanism is arranged on one side of the cleaning mechanism, a medicine feeding mechanism is arranged above the cleaning mechanism, and the medicine feeding mechanism is connected with the purifying mechanism. The cleaning mechanism comprises a cleaning pool, a first ultrasonic transducer used for emitting ultrasonic vibration from the bottom, a second ultrasonic transducer used for emitting ultrasonic vibration from the two sides, a waterproof hydraulic cylinder used for shaking a propeller, a connecting block, a moving seat and wheels. According to the scheme, the cleaning efficiency of dirt on the surface of the propeller is remarkably improved, the ultrasonic transducers distributed at the bottom and on the two sides can generate a high-frequency cavitation effect to cover all parts of the propeller, and the movable base driven by the waterproof hydraulic cylinder drives the propeller to reciprocate in the cleaning pool to be matched with wheels to reduce friction; dirt is stripped in an accelerated mode under the dual effects of mechanical shaking and the cavitation effect.

Description

Technical Field

[0001] This invention relates to the field of propeller cleaning technology, and more particularly to an ultrasonic cleaning system for MR tanker propellers. Background Technology

[0002] MR tankers play a vital role in the oil transportation industry. They not only meet the needs of short- and medium-haul transportation but also respond rapidly in emergencies, providing timely oil supplies. Therefore, the position of MR tankers in the oil transportation industry is irreplaceable.

[0003] The propeller is a core component of a ship's propulsion system. It generates thrust through rotation, enabling the ship to move forward in water. Propellers are typically made of high-strength materials to ensure stability and durability during high-speed rotation. According to the authorized publication number "CN213862715U", a drone propeller cleaning device is disclosed. This device includes: legs, a base, a control panel, a bracket, a shock-absorbing device, an ultrasonic generator box, a cleaning bucket, a top cover, and a propeller placement device. The base is located on top of the legs, the control panel is located on the outer wall of the base, the bracket is located on top of the base, the shock-absorbing device is located on top of the bracket, the ultrasonic generator box is located on top of the shock-absorbing device, the cleaning bucket is located on top of the ultrasonic generator box, the top cover is located on top of the cleaning bucket, and the propeller placement device is located on top of the top cover. The bracket in this invention supports the shock-absorbing device and allows for shock absorption of the cleaning bucket. The ultrasonic generator box performs ultrasonic cleaning of the propeller, and the propeller placement device stores the propeller. This invention has a simple structure, is easy to maintain, has high cleaning efficiency, and is simple to operate.

[0004] Currently, when using ultrasonic cleaning for propellers, the propeller is often directly immersed in the cleaning tank. However, propellers freshly disassembled from the seabed often have a lot of dirt on their surface. If the tank water is not changed during the initial cleaning process, the turbidity of the water will increase after a certain period, and the water will contain a large number of dirt particles. These particles may adhere to the surface of the object being cleaned during the cleaning process, thus affecting the cleaning effect. In addition, suspended particles may absorb some ultrasonic energy, reducing the intensity of the cavitation effect. At the same time, the propeller needs to be agitated or stationary during the initial and later cleaning processes to meet the needs of different cleaning stages. Furthermore, a cleaning agent is also needed to assist in cleaning to achieve the best cleaning effect for the propeller. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned shortcomings in the prior art by proposing an ultrasonic cleaning system for MR oil tanker propellers. This system enables water circulation and purification during ultrasonic cleaning, saving water resources and ensuring water cleanliness. Furthermore, it allows for propeller agitation or stillness based on initial and subsequent cleaning processes, and cleaning agents can be added during water circulation and purification.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an ultrasonic cleaning system for MR oil tanker propellers, comprising a cleaning mechanism, a purification mechanism disposed on one side of the cleaning mechanism, and a drug delivery mechanism disposed above the cleaning mechanism, wherein the drug delivery mechanism is connected to the purification mechanism.

[0007] The cleaning mechanism includes a cleaning tank, an ultrasonic transducer I for emitting ultrasonic vibrations from the bottom, an ultrasonic transducer II for emitting ultrasonic vibrations from both sides, a waterproof hydraulic cylinder for shaking the propeller, connecting blocks, a movable seat, and wheels. Several ultrasonic transducers I are distributed at the bottom of the cleaning tank, and several ultrasonic transducers II are distributed on both sides of the cleaning tank. Several waterproof hydraulic cylinders are installed on one side of the inner wall of the cleaning tank. The interior of each waterproof hydraulic cylinder has a piston rod for extension and retraction, and the end of the piston rod has a connecting block. A movable seat for supporting the propeller is installed on the other side of several connecting blocks.

[0008] The purification mechanism includes a liquid outlet, a water pump, a connection port, and a purification cylinder for purifying water.

[0009] The drug delivery mechanism includes a cartridge for storing the cleaning agent, a three-way connector for transition and connection, and a spiral blade for stable discharge.

[0010] Preferably, the cleaning mechanism further includes a base, several raised blocks are provided below the cleaning pool, the raised blocks are staggered with the bottom ultrasonic transducer, a barrier is provided at the upper end of the movable seat, several hollow holes are provided on the surface of the movable seat, and several wheels are fixedly distributed at the lower end of the movable seat, the surface of the wheels is rolled with the bottom of the cleaning pool.

[0011] Preferably, a liquid outlet is provided through the lower end of one side of the cleaning tank, and a water pump is provided above the base. The water inlet of the water pump is connected to the end flange of the liquid outlet, and the liquid outlet of the water pump is also fitted with a connecting port on the flange.

[0012] Preferably, a purification cylinder is also provided above the base, a waste discharge port is provided through the lower end of the purification cylinder, a liquid inlet port is provided through one side of the purification cylinder, a cover plate is provided covering the upper end of the purification cylinder, and a backwash port is provided through the center of the cover plate.

[0013] Preferably, a circulation port is provided through one side of the purification cylinder, a side plate is provided above the base, a tube sleeve is provided on one side of the side plate, the surface of the circulation port is slidably fitted inside the tube sleeve, and the outer ring wall of the tube sleeve is fixedly installed to the surface of the side plate by a bracket.

[0014] Preferably, the interior of the purification cylinder is provided with filter screen one, filter screen two and filter screen three in sequence along the vertical position. Filter screen one is made of aluminum alloy wire mesh material, filter screen two is made of activated carbon filter material, and filter screen three is made of non-woven fabric material. Filter screen one and filter screen two are respectively fixed to the inner wall of the purification cylinder by screws, and filter screen three is bonded to the inner wall of the purification cylinder by resin adhesive.

[0015] Preferably, a medicine cartridge is provided above the cleaning tank, and a discharge port is provided through the lower end of the medicine cartridge. A T-junction is provided at the lower end of the discharge port. The upper passage of the T-junction is connected to the end flange of the discharge port. The lower passage of the T-junction is perpendicular to the cleaning tank. The side passage of the T-junction is connected to the flange at the end of the circulation port away from the purification cylinder. Two mounting brackets are symmetrically distributed on the outside of the medicine cartridge. The lower end of any one mounting bracket is fixed to the end of the cleaning tank by bolts. The upper end of the medicine cartridge is covered with a cylinder cover, and a dosing port is provided through one side of the cylinder cover.

[0016] Preferably, a bearing is provided through the center of the cylinder cover, and a shaft is provided through the inside of the bearing. The surface of the shaft is interference-fitted with the inner ring wall of the bearing. A spiral blade is provided on the shaft at the discharge port. A sealing strip is provided on the outer spiral surface of the spiral blade. The sealing strip is pressed and adhered to the inner wall of the discharge port.

[0017] Preferably, the shaft has several blades distributed on the inner surface of the cleaning tank, the lower end of the shaft is rotatably provided with a bearing seat, the lower end of the bearing seat is fixed to the bottom of the cleaning tank, the upper end of the shaft is provided with a motor, the motor has a rotating shaft for driving inside, and the end of the rotating shaft is fixedly connected to the shaft by a coupling.

[0018] Preferably, the ultrasonic cleaning method for MR tanker propellers is as follows:

[0019] S1. Place the propeller to be cleaned steadily on the mobile base, using the enclosure to prevent it from slipping when shaking, and ensure that the propeller and the mobile base are compatible in size.

[0020] S2. Add cleaning agent to the cartridge through the dosing interface, close the valve and seal the cartridge cover. If the liquid level in the cleaning tank is insufficient, clean water needs to be injected from the outside to the appropriate height.

[0021] S3. Connect the power supply to ultrasonic transducer one and ultrasonic transducer two to convert the mains power into high-frequency vibration. The mechanical vibration is generated through the piezoelectric ceramic, which causes the cleaning fluid to produce a cavitation effect and initially remove the dirt on the surface of the propeller.

[0022] S4. Start the waterproof hydraulic cylinder, push the piston rod to drive the moving seat and propeller to move back and forth in the cleaning pool. The wheels reduce frictional resistance and enhance the dirt removal effect.

[0023] S5. Start the motor to drive the shaft to rotate. The spiral blades will convey the cleaning agent in the cartridge to the cleaning tank through the discharge port. At the same time, the blades will stir the cleaning liquid to promote the uniform diffusion of the cleaning agent.

[0024] S6. Intermittently shut down the ultrasonic system and start the water pump to draw the sewage into the purification cylinder through the outlet. The sewage passes through filter screen 1 to intercept large particles, filter screen 2 with activated carbon to remove odors, and filter screen 3 with non-woven fabric to filter fine impurities. The purified liquid flows back to the cleaning tank through the circulation interface.

[0025] S7. Periodically close the liquid outlet valve, connect the clean water pipe to the backwash port, turn on the spray head to rinse the filter screen, and discharge the waste from the waste discharge port. After completion, close the waste discharge port valve to restore the purification function.

[0026] S8. After cleaning, turn off the ultrasonic cleaner, hydraulic cylinder and motor in sequence, empty the cleaning tank and clean the moving seat, filter and other parts, check the condition of the sealing strip and transducer to ensure normal use next time.

[0027] The design scheme proposed in this invention has the following beneficial effects during application:

[0028] 1. This solution significantly improves the efficiency of removing dirt from the propeller surface through the synergistic effect of multi-directional ultrasonic transducers and dynamic shaking mechanism. The ultrasonic transducers distributed at the bottom and sides can generate high-frequency cavitation effect, covering all parts of the propeller. Meanwhile, the moving seat driven by the waterproof hydraulic cylinder drives the propeller to move back and forth in the cleaning tank. The wheels reduce friction, allowing the dirt to be removed more quickly under the dual action of mechanical shaking and cavitation effect. This dynamic and static cleaning method is particularly suitable for treating stubborn oil stains and marine organisms accumulated on the surface of oil tanker propellers.

[0029] 2. As described in 1, the three-stage filtration and purification system with automatic dosing and mixing structure enables the recycling of the cleaning solution. The metal filter, activated carbon, and non-woven fabric arranged in layers inside the purification cylinder can gradually remove impurities of different particle sizes and adsorb odors. The purified liquid is returned to the cleaning tank through the circulation interface. At the same time, the spiral blades deliver the cleaning agent in a quantitative manner, and the rotating blades achieve rapid mixing, which not only ensures the stability of the cleaning agent concentration, but also avoids the unevenness of manual addition. Attached Figure Description

[0030] Figure 1 This is a schematic diagram showing the distribution of the various mechanisms in this invention;

[0031] Figure 2This is a front view of the overall structure of the present invention;

[0032] Figure 3 This is a side view of the overall structure of the present invention;

[0033] Figure 4 This is a top view of the overall structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the internal structure of the cleaning tank of the present invention;

[0035] Figure 6 This is a schematic diagram of the internal structure of the purification cylinder of the present invention;

[0036] Figure 7 This is a schematic diagram of the internal structure of the cartridge of the present invention;

[0037] Figure 8 This is a partially enlarged schematic diagram of the cartridge case of the present invention;

[0038] Figure 9 This is a schematic diagram showing a partial distribution of the spiral blades and sealing strips of the present invention.

[0039] In the diagram: 1. Cleaning mechanism; 10. Base; 11. Elevating block; 12. Cleaning tank; 13. Ultrasonic transducer one; 14. Ultrasonic transducer two; 15. Waterproof hydraulic cylinder; 16. Connecting block; 17. Movable seat; 18. Enclosure; 19. Wheels; 110. Hole.

[0040] 2. Purification mechanism; 20. Liquid outlet; 21. Water pump; 22. Connection port; 201. Purification cylinder; 202. Waste discharge port; 203. Liquid inlet port; 204. Cover plate; 205. Backwash port; 206. Circulation port; 207. Side plate; 208. Pipe sleeve; 2001. Filter screen one; 2002. Filter screen two; 2003. Filter screen three;

[0041] 3. Drug delivery mechanism; 30. Drug cartridge; 31. Discharge port; 32. T-junction port; 33. Mounting bracket; 34. Cylinder cover; 35. Drug delivery port; 301. Bearing; 302. Shaft; 303. Spiral blade; 304. Shaft seat; 305. Blade; 306. Sealing strip; 307. Motor. Detailed Implementation

[0042] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0043] Example 1

[0044] Reference Figures 1-9An ultrasonic cleaning system for MR oil tanker propellers includes a cleaning mechanism 1, a purification mechanism 2 is provided on one side of the cleaning mechanism 1, and a drug delivery mechanism 3 is provided above the cleaning mechanism 1. The drug delivery mechanism 3 is connected to the purification mechanism 2.

[0045] The cleaning mechanism 1 includes a cleaning tank 12, an ultrasonic transducer 13 for emitting ultrasonic vibrations from the bottom, ultrasonic transducers 14 for emitting ultrasonic vibrations from both sides, a waterproof hydraulic cylinder 15 for shaking the propeller, a connecting block 16, a movable seat 17, and wheels 19. Several ultrasonic transducers 13 are distributed at the bottom of the cleaning tank 12, and any one of them is fixed to the bottom of the cleaning tank 12 with screws. Several ultrasonic transducers 14 are distributed on both sides of the cleaning tank 12, and any one of them is fixed to the cleaning tank 12 with screws. The working principle of the ultrasonic transducers is as follows: first, they receive mains power, usually 50 or 60 Hz low-frequency AC power, which is converted to DC power by a rectifier and filter circuit. Then, a high-frequency oscillator, usually a transistor or MOSFET switching circuit, generates a high-frequency electrical signal, typically in the range of 20 kHz-1 kHz. The frequency (MHz) is adjustable according to application requirements. A high-frequency electrical signal is applied to a piezoelectric ceramic transducer, such as lead zirconate titanate (PZT). Under the action of an alternating electric field, the piezoelectric material undergoes periodic deformation, generating mechanical vibration. The transducer amplifies the vibration amplitude through a mechanical resonator. Its design needs to match the operating frequency to achieve resonance, thereby amplifying the micron-level vibration to tens of microns and increasing the energy density. The amplified vibration passes through the cleaning tank 12 and is transmitted into the cleaning fluid in the form of a high-frequency longitudinal wave, realizing ultrasonic cleaning of the propeller. Several waterproof hydraulic cylinders 15 are provided on one side of the inner wall of the cleaning tank 12. The end of any one of the waterproof hydraulic cylinders 15 is fixed to the inner wall of the cleaning tank 12 by screws. The interior of the waterproof hydraulic cylinder 15 is provided with a piston rod for extension and retraction, and the end of the piston rod is provided with a connecting block 16. The connecting block 16 is fixed to the end face of the piston rod by screws. The other side of the several connecting blocks 16 is provided with a support for the propeller. The movable seat 17 is welded and fixed to the end of any connecting block 16 away from the waterproof hydraulic cylinder 15. Several wheels 19 are fixedly distributed at the lower end of the movable seat 17. The upper end of the wheels 19 is welded and fixed to the bottom of the movable seat 17 through the wheel frame. The surface of the wheels 19 is rolled with the bottom of the interior of the cleaning pool 12. During the initial cleaning, in order to allow the propeller placed above the movable seat 17 to shake, the piston rod of the waterproof hydraulic cylinder 15 is activated, which can extend and retract, thereby driving the movable seat 17 to extend and retract within the cleaning pool 12, thus achieving the shaking work during propeller cleaning. During the initial cleaning, since there is a lot of dirt on the surface of the propeller, the shaking cleaning method can improve the ability to clean and remove dirt over a large area. When the movable seat 17 moves, it can be supported by the wheels 19, and the rolling effect of the wheels 19 can reduce the frictional resistance of the movable seat 17 during the movement process.

[0046] The purification mechanism 2 includes a liquid outlet 20, a water pump 21, a connection port 22, and a purification cylinder 201 for purifying water.

[0047] The drug delivery mechanism 3 includes a cartridge 30 for storing cleaning agent, a three-way connector 32 for transition connection, and a spiral blade 303 for stable discharge.

[0048] The cleaning mechanism 1 also includes a base 10. Several raised blocks 11 are set below the cleaning tank 12. Any one of the raised blocks 11 is fixed to the lower end of the cleaning tank 12 by welding. The cleaning tank 12 is made of stainless steel. The raised blocks 11 and the bottom ultrasonic transducer 13 are staggered and distributed. The raised blocks 11 are fixed to the surface of the base 10 by screws. The specifications of the movable seat 17 match the specifications of the propeller, so that the propeller can be stably placed on the upper end of the movable seat 17. A baffle 18 is set on the upper end of the movable seat 17. The lower end of the baffle 18 is fixed to the connection position of the movable seat 17 by welding. The baffle 18 can cooperate with the movable seat 17 to prevent the propeller from slipping off the movable seat 17 when it is placed and shaken for cleaning. Several hollow holes 110 are also opened on the surface of the movable seat 17. The hollow holes 110 allow the cleaning fluid to pass through the movable seat 17 normally during cleaning, improving the contact effect between the cleaning fluid and the propeller.

[0049] A liquid outlet 20 is provided through the lower end of one side of the cleaning tank 12. The connection between the liquid outlet 20 and the cleaning tank 12 is fixed by welding. A water pump 21 is provided above the base 10. The lower end of the outer ring wall of the water pump 21 is fixedly installed on the surface of the base 10 by a bracket. The water inlet end of the water pump 21 is connected to the end flange of the liquid outlet 20. The liquid outlet end of the water pump 21 is also fitted with a connecting port 22. After the water pump 21 is connected to the power supply, the cleaning water in the cleaning tank 12 can be extracted through the liquid outlet 20 when the ultrasonic cleaning is intermittently stopped and sent to the interior of the purification cylinder 201 for filtration and purification.

[0050] A purification cylinder 201 is also installed above the base 10. The outer wall of the purification cylinder 201 is fixed to the surface of the base 10 by a bracket. A waste discharge port 202 is provided through the lower end of the purification cylinder 201. The connection between the waste discharge port 202 and the purification cylinder 201 is fixed by welding. A liquid inlet port 203 is provided through one side of the purification cylinder 201. The connection between the liquid inlet port 203 and the waste discharge port 202 is fixed by welding. The purification cylinder 201 can collect the cleaning liquid that needs to be filtered when the water pump 21 draws it out of the cleaning tank 12. Valves are installed on the liquid outlet port 20 and the waste discharge port 202 located below the liquid inlet port 203. The valve of the liquid outlet port 20 can prevent the backwash waste from flowing back into the cleaning tank 12 when the purification cylinder 201 is backwashed. The valve of the waste discharge port 202 can close the waste discharge port 202 when the cleaning liquid is circulated for purification. At the lower end, during backwashing, the filtered waste can be discharged. When the liquid level in the cleaning tank 12 is insufficient, appropriate amounts of clean water or cleaning solution are added from the outside. The upper end of the purification cylinder 201 is covered with a cover plate 204. The lower edge of the cover plate 204 is fixed to the purification cylinder 201 with screws. A backwashing interface 205 is provided through the center of the cover plate 204. The connection between the backwashing interface 205 and the cover plate 204 is fixed by welding. The backwashing interface 205 can be connected to an external clean water pipe, so that clean water can be sent into the purification cylinder 201 to backwash each layer of the filter structure. The surface of the backwashing interface 205 is provided with valves for water inlet and outlet and opening and closing. A spray head is installed at the lower end of the backwashing interface 205 inside the purification cylinder 201, which can improve the washing spray effect during backwashing and ensure that the filter structure is thoroughly washed.

[0051] A circulation port 206 is provided through one side of the purification cylinder 201. The connection between the circulation port 206 and the purification cylinder 201 is fixed by welding. After the cleaning fluid is purified, the liquid level gradually rises and overflows through the circulation port 206, flowing back into the interior of the cleaning tank 12. A side plate 207 is provided above the base 10. The lower end of the side plate 207 is fixed to the surface of the base 10 by screws. A sleeve 208 is provided on one side of the side plate 207. The surface of the circulation port 206 is slidably fitted inside the sleeve 208. The outer ring wall of the sleeve 208 is fixedly installed to the surface of the side plate 207 by a bracket. When the circulation port 206 needs to be supported, the side plate 207 and the sleeve 208 can ensure that the circulation port 206 has good stability when it is extended, and avoid sagging and deformation.

[0052] Inside the purification cylinder 201, three filters are arranged vertically in sequence: filter one 2001, filter two 2002, and filter three 2003. Filter one 2001 is made of aluminum alloy wire mesh, filter two 2002 is made of activated carbon mesh, and filter three 2003 is made of non-woven fabric. Filter one 2001 and filter two 2002 are fixed to the inner wall of the purification cylinder 201 with screws, and filter three 2003 is bonded to the inner wall of the purification cylinder 201 with resin adhesive. When the cleaning liquid in the cleaning tank 12 is filtered, primary filtration is performed through filter one 2001 to block large particles of dirt and impurities. Secondary filtration is performed through filter two 2002 to block medium and small particles and purify the odor in the water. Filter three 2003 can block fine mud and sand particles, ensuring that the water that is circulated and returned to the cleaning tank 12 will not contain too many high-particle impurities that would affect the effect of subsequent ultrasonic cleaning.

[0053] A cartridge 30 is installed above the cleaning tank 12. A discharge port 31 extends through the lower end of the cartridge 30. The discharge port 31 and the cartridge 30 are fixed together by welding. A T-junction 32 is installed at the lower end of the discharge port 31. The upper passage of the T-junction 32 connects to the end flange of the discharge port 31, and the lower passage of the T-junction 32 is perpendicular to the cleaning tank 12. The side passage of the T-junction 32 connects to the flange at the end of the circulation port 206 furthest from the purification cylinder 201. The cartridges 30 are symmetrically distributed on the outside. There are two mounting brackets 33, which are right-angle bent structures. The lower end of either mounting bracket 33 is fixed to the end of the cleaning tank 12 by bolts. The mounting bracket 33 is fixed to the outer ring wall of the cartridge 30 by welding. The cartridge 30 can store cleaning agent. When the filtered cleaning liquid is circulated out of the circulation port 206, the three-way port 32 can be discharged through the lower passage. Its upper passage will be sealed by the sealing strip 306 outside the spiral plate 303. At the same time, due to the effect of gravity, it will not seep into the interior of the cartridge 30.

[0054] The upper end of the cartridge 30 is covered with a cap 34. The lower end of the cap 34 is fixed to the cartridge 30 by screws. A dosing port 35 is provided through one side of the cap 34. The dosing port 35 is fixed to the cap 34 by welding. A valve for controlling the inlet and outlet of the drug is installed on the dosing port 35. The cap 34 can seal the cartridge 30. The cleaning agent can be replenished to the cartridge 30 in a timed and quantitative manner through the dosing port 35.

[0055] A bearing 301 is installed through the center of the cylinder cover 34. The outer ring wall of the bearing 301 is fixed to the cylinder cover 34 by welding. A shaft 302 is installed through the inside of the bearing 301. The surface of the shaft 302 is interference-fitted with the inner ring wall of the bearing 301, allowing the shaft 302 to rotate stably based on the bearing 301. A spiral blade 303 is installed on the shaft 302 at the discharge port 31. The spiral blade 303 is fixedly wound around the surface of the shaft 302, and the outer spiral surface of the spiral blade 303 is provided with... A sealing strip 306, made of rubber, is pressed and adhered to the inner wall of the discharge port 31. A spiral blade 303 allows for spiral discharge from the discharge port 31. A shaft 302, located on the inner surface of the cleaning tank 12, has several blades 305 distributed among its components. One end of any blade 305 is welded and fixed to the surface of the shaft 302. The blades 305 allow the cleaning agent to be spirally discharged into the cleaning tank 12, ensuring stable mixing of the cleaning agent and cleaning liquid. The shaft 302... A bearing seat 304 is rotatably mounted at the lower end, and the lower end of the bearing seat 304 is fixed to the bottom of the cleaning tank 12. The bearing seat 304 ensures the stable rotation of the shaft 302. A motor 307 is mounted at the upper end of the shaft 302. The outer ring wall of the motor 307 is fixed to the surface of the cylinder cover 34 by a bracket. The motor 307 has a drive shaft inside, and the end of the shaft is fixedly connected to the shaft 302 by a coupling. When it is necessary to release the cleaning agent and synchronize the mixing and diffusion, the power supply to the motor 307 is turned on. The motor 307 drives the shaft to rotate, causing the shaft 302 to rotate. This allows the spiral blade 303 to discharge the cleaning agent from the cartridge 30. The cleaning agent can be in powder or granular form, or it can be liquid, depending on the actual needs. The spiral discharge method ensures continuous and stable delivery of the cleaning agent. As the shaft 302 rotates, it also drives the blade 305 to rotate, which can stably mix the cleaning agent and cleaning liquid and diffuse them to the surroundings, allowing the cleaning agent to fully contact the propeller and improve the quality of ultrasonic cleaning.

[0056] The ultrasonic cleaning method for MR oil tanker propellers is as follows:

[0057] S1. Place the propeller to be cleaned stably on the moving base 17, and use the enclosure 18 to prevent it from slipping when shaking, and ensure that the propeller and the moving base 17 are compatible in size.

[0058] S2. Add cleaning agent to the cartridge 30 through the dosing interface 35, close the valve and seal the cartridge cover 34. If the liquid level in the cleaning tank 12 is insufficient, clean water needs to be injected from the outside to an appropriate height.

[0059] S3. Connect the power supply to ultrasonic transducer 13 and ultrasonic transducer 24 to convert the mains power into high-frequency vibration, which generates mechanical vibration through piezoelectric ceramics, causing the cleaning fluid to produce a cavitation effect and initially remove dirt from the surface of the propeller.

[0060] S4. Start the waterproof hydraulic cylinder 15, push the piston rod to drive the moving seat 17 and propeller to move back and forth in the cleaning pool 12. The wheel 19 reduces frictional resistance and enhances the dirt removal effect.

[0061] S5. Start the motor 307 to drive the shaft 302 to rotate. The spiral blade 303 conveys the cleaning agent in the cartridge 30 to the cleaning tank 12 through the discharge port 31. At the same time, the blade 305 stirs the cleaning liquid to promote the uniform diffusion of the cleaning agent.

[0062] S6. Intermittently shut down the ultrasonic system and start the water pump 21 to draw the sewage into the purification cylinder 201 through the outlet interface 20. The sewage passes through the filter screen 1 2001 to intercept large particles, the filter screen 2 2002 to remove odors with activated carbon, and the filter screen 3 2003 to filter fine impurities with non-woven fabric. The purified liquid flows back to the cleaning tank 12 through the circulation interface 206.

[0063] S7. Periodically close the outlet valve 20, connect the clean water pipe to the backwash port 205, turn on the spray head to rinse the filter screen, and discharge the waste from the waste discharge port 202. After completion, close the waste discharge port 202 valve to restore the purification function.

[0064] S8. After cleaning, turn off the ultrasonic cleaner, hydraulic cylinder and motor in sequence, empty the cleaning tank 12 and clean the moving seat 17, filter screen and other parts, check the sealing strip 306 and transducer status to ensure normal use next time.

[0065] Example 2

[0066] Implementation scenario:

[0067] After three months of sailing, the propeller of a certain MR oil tanker was covered with a large amount of marine organisms and oil, requiring regular maintenance and cleaning.

[0068] Operating procedures:

[0069] Preprocessing:

[0070] The propeller is hoisted onto the movable seat 17 and its position is adjusted to fit snugly against the enclosure 18 to prevent it from shaking and falling off.

[0071] Biodegradable liquid cleaning agent (for organic matter) is added to cartridge 30 through dosing interface 35. The level sensor shows that the water level in cleaning tank 12 is insufficient, so clean water is added until it covers the propeller blades.

[0072] Multi-mode cleaning:

[0073] Start ultrasonic transducers 13 and 14, set the frequency to 40kHz, and use the cavitation effect to remove large pieces of dirt; simultaneously activate the waterproof hydraulic cylinder 15, which pushes the moving seat 17 to move back and forth 5cm at a frequency of 0.5Hz to enhance the dirt removal effect.

[0074] Motor 307 drives spiral blade 303 to deliver cleaning agent at 30 rpm, and blade 305 stirs and accelerates the mixing, and the cleaning liquid gradually turns milky white.

[0075] Circulating purification:

[0076] The ultrasonic wave is paused every 20 minutes, and water pump 21 is started to pump the sewage into purification tank 201.

[0077] Filter 12001 is a 100-mesh aluminum alloy mesh that intercepts barnacle fragments;

[0078] Filter 2002 is made of activated carbon, which adsorbs oil and odors;

[0079] Filter 3 2003 is made of 20μm non-woven fabric and filters suspended particles.

[0080] After purification, the water is returned through circulation interface 206. Once the turbidity sensor indicates that the cleanliness meets the standard, ultrasonic cleaning continues.

[0081] Backwashing maintenance:

[0082] After cleaning, close the outlet valve 20, connect the high-pressure water pipe to the backwash port 205, and backwash the filter screen for 10 minutes. Then, discharge the black flocculent sludge from the waste discharge port 202.

[0083] Results: After cleaning, there was no residual biofilm on the propeller surface, and the metallic luster was restored. The cleaning time was 2.5 hours, which is 60% more efficient than traditional manual cleaning.

[0084] Example 3

[0085] Implementation scenario:

[0086] The oil tanker's propeller is covered in thick sludge due to an oil spill and needs to be cleaned quickly to restore its navigation capability.

[0087] Special handling:

[0088] Enhanced cleaning parameters:

[0089] A high-temperature oil-decomposing agent is added to the cartridge 30, the motor 307 is accelerated to 50 rpm, and the spiral blade 303 accelerates the feeding.

[0090] The ultrasonic transducer is switched to 80kHz high-frequency mode to enhance cavitation intensity; the stroke of the waterproof hydraulic cylinder is increased to 10cm, and the frequency is 1Hz, with mechanical force assisting in the fracturing of sludge.

[0091] Phased purification:

[0092] During the initial filtration, an oil sludge layer quickly forms on the surface of filter screen 2001, triggering a differential pressure alarm and immediately initiating a backwashing procedure with the interval shortened to 15 minutes.

[0093] The filter screen 2002 was replaced with oleophobic activated carbon to improve the oil adsorption capacity.

[0094] Thermal Assist:

[0095] Hot water at 60°C is introduced into the cleaning tank 12 through a temporary external pipe to accelerate the dissolution of oil stains; blades 305 continuously stir to ensure uniform temperature.

[0096] Results: The sludge was completely removed after 6 hours. The filter screen (2003) was replaced twice, and the backwashing consumed 3 tons of water. Compared with the traditional solvent soaking method, this method saves 45% of the chemical usage and produces no harmful gas emissions.

[0097] In practice

[0098] The cleaning mechanism 1 of this solution achieves multi-directional high-frequency vibration cleaning through ultrasonic transducer 13 and ultrasonic transducer 24. Ultrasonic transducer 13 is vertically distributed at the bottom of the cleaning tank 12, and transducer 24 is symmetrically installed on both sides of the cleaning tank 12. Both transducers convert high-frequency electrical signals into mechanical vibrations through piezoelectric ceramic materials, with a frequency range of 20kHz-1MHz. The longitudinal wave generated by the bottom transducer 13 and the transverse wave of the side transducer 24 form a composite sound field, causing the cleaning fluid to produce a cavitation effect. The high-pressure bubbles burst instantly and impact the stubborn dirt on the propeller surface. At the same time, the waterproof hydraulic cylinder 15 drives the connecting block 16 through the extension and retraction of the piston rod, which drives the moving seat 17 to move back and forth along the inner wall of the cleaning tank 12. The wheel 19 reduces frictional resistance and causes the propeller to sway under the limitation of the enclosure 18. This synergistic effect enhances the fluid shear force, especially for the curved structure of the propeller. Through the superposition effect of mechanical swaying 18 and ultrasonic cavitation, the dirt is removed more quickly. The hollow hole 110 design ensures that the cleaning fluid can fully penetrate the moving seat 17 and improve the contact efficiency.

[0099] The purification mechanism 2 and the drug delivery mechanism 3 work together to regenerate the cleaning solution and precisely deliver the drug. The water pump 21 draws the contaminated cleaning solution into the purification cylinder 201 through the liquid outlet 20. The solution passes through filter screen 1 2001 to intercept large particles such as iron filings, filter screen 2 2002 to adsorb grease and odors, and filter screen 3 2003 to filter micron-sized particles. The purified liquid flows back to the cleaning tank 12 from the circulation interface 206 through the three-way interface 32, forming a closed-loop circulation. At the same time, the motor 307 drives the shaft 302 to rotate, and the spiral blades 303 convey the cleaning agent in the drug cylinder 30 through the discharge interface 31. The sealing strip 306 prevents backflow. The blades 305 are supported by the shaft seat 304 and stir at high speed, so that the cleaning agent is evenly diffused through the lower passage of the three-way interface 32. During backwashing, external clean water washes the filter screen in reverse through the spray head of the backwash interface 205, and the waste is discharged from the waste discharge interface 202.

[0100] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An ultrasonic cleaning system for MR tanker propellers, characterized in that: It includes a cleaning mechanism (1), a purification mechanism (2) is provided on one side of the cleaning mechanism (1), and a drug delivery mechanism (3) is provided above the cleaning mechanism (1). The drug delivery mechanism (3) is connected to the purification mechanism (2). The cleaning mechanism (1) includes a cleaning tank (12), an ultrasonic transducer (13) for emitting ultrasonic vibrations from the bottom, an ultrasonic transducer (24) for emitting ultrasonic vibrations from both sides, a waterproof hydraulic cylinder (15) for shaking the propeller, a connecting block (16), a movable seat (17), and wheels (19). Several ultrasonic transducers (13) are distributed at the bottom of the cleaning tank (12), and several ultrasonic transducers (24) are distributed on both sides of the cleaning tank (12). Several waterproof hydraulic cylinders (15) are provided on one side of the inner wall of the cleaning tank (12). A piston rod for extension and retraction is provided inside the waterproof hydraulic cylinder (15), and a connecting block (16) is provided at the end of the piston rod. A movable seat (17) for supporting the propeller is provided on the other side of several connecting blocks (16).

2. The ultrasonic cleaning system for MR tanker propellers according to claim 1, characterized in that: The cleaning mechanism (1) also includes a base (10), and several raised blocks (11) are provided below the cleaning pool (12). The raised blocks (11) and the bottom ultrasonic transducer (13) are staggered. A barrier (18) is provided at the upper end of the movable seat (17). Several hollow holes (110) are also provided on the surface of the movable seat (17). Several wheels (19) are fixedly distributed at the lower end of the movable seat (17). The surface of the wheels (19) is rolled with the bottom of the cleaning pool (12).

3. The ultrasonic cleaning system for MR tanker propellers according to claim 1, characterized in that: The purification mechanism (2) includes a liquid outlet (20), a water pump (21), a connection port (22), and a purification cylinder (201) for purifying water. The lower end of one side of the cleaning tank (12) is provided with a liquid outlet (20), and a water pump (21) is provided above the base (10). The water inlet end of the water pump (21) is connected to the end flange of the liquid outlet (20), and the liquid outlet end of the water pump (21) is also flanged with a connection port (22).

4. The ultrasonic cleaning system for an MR tanker propeller according to claim 3, characterized in that: A purification cylinder (201) is also provided above the base (10). A waste discharge port (202) is provided through the lower end of the purification cylinder (201). A liquid inlet port (203) is provided through one side of the purification cylinder (201). A cover plate (204) is provided covering the upper end of the purification cylinder (201). A backwash port (205) is provided through the center of the cover plate (204).

5. The ultrasonic cleaning system for an MR tanker propeller according to claim 4, characterized in that: A circulation port (206) is provided through one side of the purification cylinder (201), a side plate (207) is provided above the base (10), a sleeve (208) is provided on one side of the side plate (207), the surface of the circulation port (206) is slidably fitted inside the sleeve (208), and the outer ring wall of the sleeve (208) is fixedly installed to the surface of the side plate (207) by a bracket.

6. The ultrasonic cleaning system for an MR tanker propeller according to claim 5, characterized in that: Inside the purification cylinder (201), filter screen one (2001), filter screen two (2002), and filter screen three (2003) are arranged vertically in sequence. Filter screen one (2001) is made of aluminum alloy wire mesh, filter screen two (2002) is made of activated carbon mesh, and filter screen three (2003) is made of non-woven fabric. Filter screen one (2001) and filter screen two (2002) are fixed to the inner wall of the purification cylinder (201) by screws, and filter screen three (2003) is bonded to the inner wall of the purification cylinder (201) by resin adhesive.

7. The ultrasonic cleaning system for an MR tanker propeller according to claim 3, characterized in that: The drug delivery mechanism (3) includes a cartridge (30) for storing cleaning agent, a three-way connector (32) for transition connection, and a spiral blade (303) for stable discharge; the cartridge (30) is arranged above the cleaning tank (12), and a discharge port (31) is provided through the lower end of the cartridge (30). A three-way connector (32) is provided at the lower end of the discharge port (31), and the upper passage of the three-way connector (32) is connected to the end flange of the discharge port (31). The lower passage of the three-way interface (32) is perpendicular to the cleaning tank (12). The side passage of the three-way interface (32) is connected to the flange at the end of the circulation interface (206) away from the purification cylinder (201). Two mounting brackets (33) are symmetrically distributed on the outside of the cartridge (30). The lower end of any one of the mounting brackets (33) is fixed to the end of the cleaning tank (12) by bolts. The upper end of the cartridge (30) is covered with a cylinder cover (34). A dosing interface (35) is provided through one side of the cylinder cover (34).

8. The ultrasonic cleaning system for an MR tanker propeller according to claim 7, characterized in that: A bearing (301) is installed through the center of the cylinder cover (34). A shaft (302) is installed through the inside of the bearing (301). The surface of the shaft (302) is interference-fitted with the inner ring wall of the bearing (301). A spiral blade (303) is installed on the shaft (302) at the discharge port (31). A sealing strip (306) is installed on the outer spiral surface of the spiral blade (303). The sealing strip (306) is pressed and adhered to the inner wall of the discharge port (31).

9. The ultrasonic cleaning system for an MR tanker propeller according to claim 8, characterized in that: The shaft (302) has several blades (305) distributed on the inner surface of the cleaning tank (12). The lower end of the shaft (302) is rotatably provided with a bearing seat (304), and the lower end of the bearing seat (304) is fixed to the bottom of the cleaning tank (12). The upper end of the shaft (302) is provided with a motor (307), and the motor (307) has a rotating shaft for driving inside. The end of the rotating shaft and the shaft (302) are connected by a coupling for fixed transmission.

10. An ultrasonic cleaning system for MR tanker propellers according to any one of claims 1-9, characterized in that: The ultrasonic cleaning method for MR oil tanker propellers is as follows: S1. Place the propeller to be cleaned steadily on the moving seat (17), and use the guardrail (18) to prevent it from slipping when shaking, and ensure that the propeller and the moving seat (17) are in good fit. S2. Add cleaning agent to the cartridge (30) through the dosing interface (35), close the valve and seal the cartridge cover (34). If the liquid level in the cleaning tank (12) is insufficient, clean water needs to be injected from the outside to an appropriate height. S3. Connect the power supply of ultrasonic transducer one (13) and ultrasonic transducer two (14) to convert the mains power into high frequency vibration, generate mechanical vibration through piezoelectric ceramic, and cause the cleaning fluid to generate cavitation effect to initially remove dirt from the surface of the propeller. S4. Start the waterproof hydraulic cylinder (15) to push the piston rod to drive the moving seat (17) and propeller to move back and forth in the cleaning pool (12). The wheels (19) reduce frictional resistance and enhance the dirt removal effect. S5. Start the motor (307) to drive the shaft (302) to rotate. The spiral blade (303) conveys the cleaning agent in the cartridge (30) to the cleaning tank (12) through the discharge port (31). At the same time, the blade (305) stirs the cleaning liquid to promote the uniform diffusion of the cleaning agent. S6. Intermittently shut down the ultrasonic system and start the water pump (21) to pump the sewage into the purification cylinder (201) through the outlet interface (20). The sewage passes through filter screen one (2001) to intercept large particles, filter screen two (2002) to remove odors with activated carbon, and filter screen three (2003) to filter fine impurities with non-woven fabric. After purification, the liquid flows back to the cleaning tank (12) through the circulation interface (206). S7. Periodically close the outlet port (20) valve, connect the clean water pipe to the backwash port (205), turn on the spray head to rinse the filter screen, and discharge the waste from the waste discharge port (202). After completion, close the waste discharge port (202) valve to restore the purification function. S8. After cleaning, turn off the ultrasonic, hydraulic cylinder and motor in sequence, empty the cleaning tank (12) and clean the moving seat (17), filter screen and other parts, check the sealing strip (306) and transducer status to ensure normal use next time.

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