A ship underwater cavitation cleaning disc capable of moving on a curved surface

Abstract

The present invention discloses an underwater cavitation cleaning disc for ships that can move on a curved surface, including a central disc body, an arc plate, a direction control mechanism and a debris discharge mechanism, the arc plate is provided with a water inlet hole that passes through both sides thereof, and a caster is installed at the lower end of the arc plate, a hollow shaft is passed through the bearing on the central disc body, and a spring tube is connected through the lower end of the hollow shaft, a nozzle is connected through the middle and lower part of the hollow shaft, and a turbine nozzle is installed at the outer end of the nozzle, and the outer ring side of the central disc body is connected to the arc plate. The invention can be easily moved on a curved surface, thereby increasing the range of cleaning the hull, and can also discharge lighter attachments that enter the cavitation cleaning disc, thereby preventing the attachments from affecting the internal structure of the cleaning disc, and can also change the direction of the recoil force, which helps the staff to easily change the movement direction of the cleaning disc as needed, thereby facilitating the staff to use it easily.

Description

Technical Field

[0001] The invention relates to the technical field of cavitation cleaning discs, in particular to an underwater cavitation cleaning disc for ships that can move on a curved surface. Background Art

[0002] Cavitation jet cleaning technology is a new underwater facility cleaning technology that introduces cavitation into water jet technology. Specifically, by controlling parameters such as pressure and flow rate, a large number of cavitation bubbles are generated when the water stream passes through the cavitation nozzle. The cavitation bubbles are collapsed in a small area on the surface of the material to produce micro-jet impacts of up to 140-170 MPa, so as to achieve the purpose of cleaning the surface attachments and dirt layers of the facility. The cavitation cleaning disc is a cleaning device manufactured using cavitation jet cleaning technology;

[0003] The existing underwater cavitation cleaning discs for ships still have the following technical problems when in use, such as:

[0004] 1. The existing underwater cavitation cleaning disc for ships is not convenient to move on a curved surface when in use. Since the hull of a ship is not entirely flat, but has many curved surfaces, if it can only move on a flat surface, it is inconvenient to clean the curved surface, which is not conducive to increasing the range of cleaning the ship;

[0005] 2. When the existing underwater cavitation cleaning disc of a ship is in use, heavier attachments will fall directly with the cleaning, while lighter attachments tend to move upward in the water and easily enter the interior of the cleaning disc, causing corrosion or damage to the components inside the cleaning disc, which is not conducive to ensuring the service life of the cavitation cleaning disc;

[0006] 3. Although the existing underwater cavitation cleaning disc of a ship can move by relying on the recoil force when in use, it cannot adjust the direction of the recoil force. This requires the staff to spend a lot of effort to rotate the cleaning disc when the direction of movement of the cavitation cleaning disc needs to be changed, which is not conducive to reducing the labor intensity of the staff.

[0007] Therefore, a ship underwater cavitation cleaning disc that can move on a curved surface is needed to solve the above problems. Summary of the invention

[0008] The object of the present invention is to provide a ship underwater cavitation cleaning disc that can move on a curved surface, so as to solve the problems mentioned in the above background technology that the existing ship underwater cavitation cleaning disc is not convenient to move on a curved surface, cannot prevent light and small attachments from entering the interior of the cleaning disc and damaging the cleaning disc, and is not convenient to adjust the direction of the recoil force.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A ship underwater cavitation cleaning disc that can move on a curved surface comprises a central disc body, an arc-shaped plate, a direction control mechanism and a debris removal mechanism, wherein the arc-shaped plate is provided with a water inlet hole that passes through both sides thereof, and a caster is installed at the lower end of the arc-shaped plate, a hollow rotating shaft passes through the bearing on the central disc body, and a spring tube is connected through the lower end of the hollow rotating shaft, a nozzle is connected through the middle and lower part of the hollow rotating shaft, and a turbine nozzle is installed at the outer end of the nozzle, the outer ring side of the central disc body is connected to the arc-shaped plate, a direction control mechanism is installed on the hollow rotating shaft, and the direction control mechanism is connected to the debris removal mechanism, the debris removal mechanism is also arranged on the hollow rotating shaft, and the height of the debris removal mechanism is lower than the height of the direction control mechanism.

[0011] Furthermore, the arc angle of the arc plate is less than 120° and greater than 100°, three arc plates are provided, and adjacent arc plates are connected by rubber strips, and the three arc plates are connected to the outer ring side of the central disk through an annular rubber ring.

[0012] By adopting the above technical solution, three arc-shaped plates can be conveniently arranged on the outer ring side of the central disk body, and the three arc-shaped plates can be relatively movable, so that the underwater cavitation cleaning disk can move on a curved surface.

[0013] Furthermore, the nozzles are distributed at equal angles in the middle and lower parts of the hollow rotating shaft.

[0014] By adopting the above technical solution, the nozzle can drive the hollow shaft to rotate when spraying liquid.

[0015] Furthermore, the impurity removal mechanism includes a liquid discharge rubber tube, a liquid collecting bin, a support tube, a sealing cover, a filter screen, a sealing cover, a dragon rod, a worm, a worm gear sleeve and a feed port. The sealing cover is sealed and connected to the middle and lower part of the hollow shaft by a bearing, and the height of the sealing cover is higher than the height of the nozzle. The sealing cover is also sealed and connected to the middle and lower part of the hollow shaft by a bearing, and the sealing cover is fixedly connected to the upper end of the sealing cover by bolts. The worm gear sleeve is keyed to the hollow shaft, and the worm gear sleeve is arranged inside the sealing cover. The worm is arranged inside the sealing cover, and two worms are symmetrically connected to the side of the worm gear sleeve. The outer end bearing seal of the worm passes through the side of the sealing cover. One end of the support tube is sealed and connected to the worm, and the support tube and the worm are coaxially arranged. The liquid collecting bin is arranged outside the arc plate. The support tube is movably arranged to penetrate the arc plate, and the liquid collecting bin is connected with the other end of the support tube. The dragon rod is arranged inside the support tube, and one end of the dragon rod is coaxially and fixedly connected with the worm. The feed port is arranged at one end of the support tube close to the hollow rotating shaft, and the feed port penetrates the inner and outer sides of the support tube. One end of the drainage rubber tube is connected to the middle of the liquid collecting bin, and a nozzle is arranged at the other end of the drainage rubber tube. The filter screen is an arc structure, and its arc angle is the same as that of the arc plate. There are 3 filter screens, and adjacent filter screens are also connected by rubber strips. One side end of the filter screen is elastically connected to the inner side of the corresponding arc plate, and the other side end of the filter screen is coaxial with the spring tube, and the distance between the other side end of the filter screen and the outer side of the spring tube is between 0.1-0.5cm.

[0016] By adopting the above technical scheme, the labor-saving structure formed by the worm and the worm gear sleeve can make the rotation speed of the hollow shaft less affected when it rotates, thereby not only ensuring that the dragon rod can be driven when the hollow shaft rotates, but also avoiding the rotation speed of the nozzle being greatly affected by the dragon rod driven by the hollow shaft. It not only ensures that the underwater cavitation cleaning disc can be stably adsorbed on the hull, but also can facilitate the discharge of lighter adsorbents from the underwater cavitation cleaning disc, thereby avoiding lighter adsorbents from entering the interior of the cleaning disc and causing damage to the cleaning disc.

[0017] Furthermore, the filter screen is connected to the arc plate by a rubber membrane, and the three filter screens form a funnel shape.

[0018] By adopting the above technical solution, the filter screen and the curved plate are connected by the rubber membrane, so that the two can move relative to each other, thereby ensuring that the connection between the two will not break when moving on the curved surface.

[0019] Furthermore, the support tube is composed of two sections, one end connected to the worm is a rigid structure, and the 3-5 cm part connected to the liquid collecting bin is made of rubber material to prevent the support tube from failing to transport liquid normally when the position of the arc plate relative to the central disk changes.

[0020] By adopting the above technical solution, the arc plates can move relative to each other when moving on the curved surface without affecting the position of the support tube, thereby avoiding the support tube from breaking or limiting the relative movement of the arc plates when the arc plates move relative to each other.

[0021] Furthermore, the height of the outer edge of the filter screen is greater than the height of its inner edge, and its outer edge is flush with the lower end of the arc plate.

[0022] By adopting the above technical scheme, the filter can filter the attachments moving upward so that only smaller attachments can enter the interior of the arc plate, and then the smaller attachments are discharged through the dragon rod. When the arc plates move relative to each other, the filter will vibrate relatively, so that the attachments attached to its lower surface can gradually move to its outer edge and finally be discharged, thereby avoiding the accumulation of more and more attachments on the lower surface of the filter and causing blockage.

[0023] Furthermore, the direction control mechanism includes a sleeve, a handle and a pointing rod, the sleeve bearing is connected to the upper end of the hollow rotating shaft, the handle is fixedly connected to the outside of the sleeve, and two handles are provided, one end of the pointing rod is also fixedly connected to the outside of the sleeve, and the other end of the pointing rod is fixedly connected to the nozzle of the drainage rubber tube, and the corner of the pointing rod is snap-fitted and slidably connected to the liquid collecting bin.

[0024] By adopting the above technical solution, the pointing rod can be rotated by rotating the handle bar, thereby adjusting the direction of the liquid sprayed out of the discharge rubber tube, thereby changing the direction of the recoil force, making it easier for staff to use the underwater cavitation cleaning disc.

[0025] Furthermore, the pointing rod and the two handle bars form a Y-shaped structure.

[0026] By adopting the above technical solution, it is convenient for the staff to hold the handle with both hands and control the rotation of the pointing rod, which is helpful for the staff to use.

[0027] Compared with the prior art, the present invention has the following beneficial effects: the underwater cavitation cleaning disc for ships that can move on a curved surface can be easily moved on a curved surface, thereby increasing the cleaning range of the ship body, and can also discharge lighter attachments that enter the cavitation cleaning disc, thereby preventing the attachments from affecting the internal structure of the cleaning disc, and can also change the direction of the recoil force, which helps the staff to easily change the moving direction of the cleaning disc as needed, thereby facilitating the staff to use it easily:

[0028] 1. The central disk body and the arc-shaped plates are connected by rubber rings, and the adjacent arc-shaped plates are connected by rubber strips, so that the arc-shaped plates can move relative to each other, and the arc-shaped plates and the central disk body can move relative to each other, so that the displacement of the arc-shaped plates themselves is not affected by other components, so that when on the curved surface, the adsorption force generated by the underwater cavitation cleaning disk can make the three arc-shaped plates move separately, so that the three casters can all be attached to the curved surface, so that the underwater cavitation disk can be easily moved on the curved surface;

[0029] 2. Through the filtration of the filter, the larger and lighter attachments are attached to the lower surface of the filter, while the smaller and lighter attachments enter the interior of the underwater cavitation cleaning disk through the filter, and then are discharged to the liquid collection bin as the dragon rod is caught, and then discharged from the drainage rubber tube, thereby preventing the small and light attachments from damaging the interior of the underwater cavitation cleaning disk. In addition, the large and light attachments on the lower surface of the filter are gradually discharged from the lower surface of the filter through the movement of the water flow and the movement of the underwater cavitation cleaning disk on the curved surface, thereby preventing the large and light attachments from accumulating on the lower surface of the filter, causing the filter to be unable to filter, and also preventing the cleaning disk from being unable to clean the adsorbed objects;

[0030] 3. The direction of the pointing rod can be adjusted by the handle, thereby changing the direction of the nozzle on the discharge rubber tube, thereby changing the direction of the recoil force, making it easier for the staff to rotate the moving direction of the cavitation cleaning disc, which is conducive to the staff's easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the main three-dimensional structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the local structure of the present invention;

[0033] Figure 3 It is a schematic diagram of a local explosion structure of a local structure of the present invention;

[0034] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure of point A;

[0035] Figure 5 It is a bottom view structural schematic diagram of a local structure of the present invention;

[0036] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of point B in the middle;

[0037] Figure 7 It is a schematic diagram of the three-dimensional structure of the present invention when viewed from above.

[0038] In the figure: 1. center plate; 2. rubber ring; 3. arc plate; 4. rubber strip; 5. hollow shaft; 6. bushing; 7. handle; 8. pointing rod; 9. drainage rubber tube; 10. liquid collecting bin; 11. support tube; 12. caster; 13. sealing cover; 14. nozzle; 15. filter screen; 16. sealing cover; 17. dragon rod; 18. worm; 19. worm gear sleeve; 20. spring tube; 21. feed inlet; 22. water inlet hole. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-7 , the present invention provides a technical solution:

[0041] Embodiment 1: In order to solve the problem that the recoil force cannot be adjusted when the underwater cavitation cleaning disc is used, and the staff needs to spend a lot of effort to adjust its moving direction, the following technical solution is now provided, specifically,

[0042] A ship underwater cavitation cleaning disk that can move on a curved surface, comprising a central disk body 1, an arc-shaped plate 3, a direction control mechanism and a debris removal mechanism, the arc-shaped plate 3 is provided with a water inlet hole 22 penetrating both sides thereof, and a caster 12 is installed at the lower end of the arc-shaped plate 3, a hollow shaft 5 is penetrated through the bearing on the central disk body 1, and a spring tube 20 is connected through the lower end of the hollow shaft 5, a nozzle 14 is connected through the middle and lower part of the hollow shaft 5, and a turbine nozzle is installed at the outer end of the nozzle 14, and the nozzles 14 are distributed at equal angles in the middle and lower part of the hollow shaft 5, the outer ring side of the central disk body 1 is connected to the arc-shaped plate 3, the arc angle of the arc-shaped plate 3 is less than 120°, and its arc angle is greater than 100°, and the arc-shaped plate 3 is provided with 3, and the adjacent arc plates 3 are connected by rubber strips 4, the three arc plates 3 are connected to the outer ring side of the central disk body 1 through the annular rubber ring 2, a direction control mechanism is installed on the hollow shaft 5, and the direction control mechanism is connected to the impurity discharge mechanism, the direction control mechanism includes a sleeve 6, a handle 7 and a pointing rod 8, the sleeve 6 is connected to the upper end of the hollow shaft 5 by a bearing, the handle 7 is fixedly connected to the outside of the sleeve 6, and two handles 7 are provided, one end of the pointing rod 8 is also fixedly connected to the outside of the sleeve 6, and the other end of the pointing rod 8 is fixedly connected to the nozzle of the discharge rubber tube 9, the corner of the pointing rod 8 is snap-fitted and slidably connected to the liquid collecting bin 10, and the pointing rod 8 and the two handles 7 form a Y-shaped structure;

[0043] When in use, the nozzle on the discharge rubber tube 9 will spray out water carrying small and light attachments, thereby generating a recoil force. During this process, the user can hold the two handles 7 with both hands and rotate the handles 7. When the handles 7 rotate, the pointing rods 8 will be driven to rotate synchronously, thereby driving the nozzle on the discharge rubber tube 9 to move synchronously, and the direction of the recoil force can be adjusted, thereby facilitating the staff to easily change the movement direction of the underwater cavitation cleaning disc, thereby facilitating the staff to easily use the underwater cavitation cleaning disc.

[0044] Embodiment 2: To solve the problem that the cavitation cleaning disc cannot discharge the small and light adsorbents that enter its interior during use, thus causing the disc to be damaged, specifically,

[0045] The debris removal mechanism is also arranged on the hollow rotating shaft 5, and the height of the debris removal mechanism is lower than the height of the direction control mechanism;

[0046] The impurity discharge mechanism includes a discharge rubber tube 9, a liquid collecting bin 10, a support tube 11, a sealing cover 13, a filter screen 15, a sealing cover 16, a dragon rod 17, a worm 18, a worm gear sleeve 19 and a feed port 21. The sealing cover 16 is connected to the middle and lower part of the hollow shaft 5 by a bearing seal, and the height of the sealing cover 16 is higher than the height of the nozzle 14. The sealing cover 13 is also connected to the middle and lower part of the hollow shaft 5 by a bearing seal, and the sealing cover 13 is fixedly connected to the upper end of the sealing cover 16 by bolts. The worm gear sleeve 19 is key-connected to the hollow shaft 5, and the worm gear sleeve 19 is arranged inside the sealing cover 16. It is arranged inside the sealing cover 16, and the two worms 18 are symmetrically connected to the side of the worm gear sleeve 19, the outer end bearing seal of the worm 18 passes through the side of the sealing cover 16, one end bearing seal of the support tube 11 is connected to the worm 18, and the support tube 11 and the worm 18 are coaxially arranged, the liquid collecting bin 10 is arranged outside the arc plate 3, and the support tube 11 is movably arranged to pass through the arc plate 3, and the liquid collecting bin 10 is connected with the other end of the support tube 11, the dragon rod 17 is arranged inside the support tube 11, and one end of the dragon rod 17 is coaxially fixedly connected with the worm 18, and the feed port 21 is provided The support tube 11 is placed at one end close to the hollow shaft 5, and the feed port 21 passes through the inner and outer sides of the support tube 11. One end of the drainage rubber tube 9 is connected to the middle of the liquid collecting bin 10, and the other end of the drainage rubber tube 9 is provided with a nozzle. The filter screen 15 is an arc structure, and its arc angle is the same as the arc angle of the arc plate 3. There are 3 filter screens 15, and the adjacent filter screens 15 are also connected by the rubber strip 4. One side end of the filter screen 15 is elastically connected to the inner side of the corresponding arc plate 3, and the other side end of the filter screen 15 is coaxial with the spring tube 20, and the other side end of the filter screen 15 is connected to the spring tube 20. The distance between the outer sides of the tube 20 is between 0.1-0.5cm, the filter screen 15 is connected to the arc plate 3 by a rubber membrane, and the three filter screens 15 form a funnel shape, the support tube 11 is composed of two sections, one end of which is connected to the worm 18 and is a rigid structure, and the 3-5cm portion connected to one end of the liquid collecting bin 10 is made of rubber material to prevent the support tube 11 from being unable to normally transport liquid when the position of the arc plate 3 relative to the central disk 1 changes, the outer edge height of the filter screen 15 is greater than the inner edge height, and the outer edge is flush with the lower end of the arc plate 3;

[0047] During use, the attachments attached to the hull are cleaned by the cavitation jet. After cleaning, the heavier attachments will fall and sink directly to the bottom of the water, while the lighter attachments will move to the inside of the underwater cavitation cleaning disk through buoyancy. The filter 15 can filter the larger and lighter attachments, so that only the smaller and lighter attachments can enter the inside of the cavitation cleaning disk. After the small and light attachments enter the inside of the cavitation cleaning disk, they enter the inside of the support tube 11 through the feed port 21, and then the small and light attachments are moved with the water by the rotation of the dragon rod 17. The large and light attachments are blocked on the outside of the filter screen 15, and the water flow and the cleaning disc move on the curved surface, causing the filter screen 15 to vibrate relatively, which can make the large and light attachments gradually move to the outside of the filter screen 15 and then be discharged, preventing the large and light attachments from gathering on the lower surface of the filter screen 15, causing the filter screen 15 to be unable to filter and hinder cleaning.

[0048] The upper end of the hollow shaft 5 is connected to a high pressure liquid input pipe and a control valve, which is prior art and will not be described in detail here.

[0049] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ship underwater cavitation cleaning disk capable of moving on a curved surface, comprising a central disk body (1), an arc-shaped plate (3), a direction control mechanism and a debris removal mechanism, characterized in that: The arc plate (3) is provided with a water inlet hole (22) penetrating the inner and outer sides thereof, and a caster (12) is installed at the lower end of the arc plate (3). A hollow shaft (5) is passed through the bearing on the central disk (1), and the lower end of the hollow shaft (5) is connected to a spring tube (20). A nozzle (14) is connected to the middle and lower part of the hollow shaft (5), and a turbine nozzle is installed at the outer end of the nozzle (14). The outer ring side of the central disk (1) is connected to the arc plate (3). A direction control mechanism is installed on the hollow shaft (5), and the direction control mechanism is connected to a debris removal mechanism. The debris removal mechanism includes a liquid discharge rubber tube (9), a liquid collection bin (10), a support tube (11), a sealing cover (13), a filter screen (15 ), a sealing cover (16), a dragon rod (17), a worm (18), a worm gear sleeve (19) and a feed port (21), wherein the sealing cover (16) is bearing-sealed and connected to the middle and lower part of the hollow shaft (5), and the height of the sealing cover (16) is higher than the height of the nozzle (14), the sealing cover (13) is also bearing-sealed and connected to the middle and lower part of the hollow shaft (5), and the sealing cover (13) is fixedly connected to the upper end of the sealing cover (16) by bolts, the worm gear sleeve (19) is key-connected to the hollow shaft (5), and the worm gear sleeve (19) is arranged inside the sealing cover (16), the worm (18) is arranged inside the sealing cover (16), and two worms (18) are symmetrically connected to the worm gear sleeve ( 19), the outer end bearing seal of the worm (18) passes through the side of the sealing cover (16), one end bearing seal of the support tube (11) is connected to the worm (18), and the support tube (11) and the worm (18) are coaxially arranged, the liquid collecting bin (10) is arranged outside the arc plate (3), and the support tube (11) is movably arranged to pass through the arc plate (3), and the liquid collecting bin (10) is connected to the other end of the support tube (11), the dragon rod (17) is arranged inside the support tube (11), and one end of the dragon rod (17) is coaxially fixedly connected to the worm (18), the feed port (21) is arranged at one end of the support tube (11) close to the hollow shaft (5), and the feed port (21) passes through the support tube (11). The inner and outer sides of the tube (11) are provided with a support tube (11) which is composed of two sections. One end of the support tube (11) connected to the worm (18) is a rigid structure, and the 3-5 cm portion of the support tube (11) connected to one end of the liquid collecting bin (10) is made of rubber material to prevent the support tube (11) from being unable to normally transport liquid when the position of the arc plate (3) relative to the central disk (1) changes. One end of the drainage rubber tube (9) is connected to the middle of the liquid collecting bin (10), and a nozzle is provided at the other end of the drainage rubber tube (9). The filter screen (15) is an arc structure, and its arc angle is the same as that of the arc plate (3). Three filter screens (15) are provided, and adjacent filter screens (15) are also connected by rubber strips (4).One side end of the filter screen (15) is elastically connected to the inner side of the corresponding arc plate (3), and the other side end of the filter screen (15) is coaxial with the spring tube (20), and the distance between the other side end of the filter screen (15) and the outer side of the spring tube (20) is between 0.1-0.5 cm, the filter screen (15) and the arc plate (3) are connected by a rubber membrane, and the three filter screens (15) form a funnel shape, the outer edge height of the filter screen (15) is greater than the inner edge height, and the outer edge is flush with the lower end of the arc plate (3), and the impurity removal mechanism is also arranged on the hollow rotor. The hollow shaft (5) is mounted on the hollow shaft (5), and the height of the impurity discharge mechanism is lower than the height of the direction control mechanism. The direction control mechanism comprises a shaft sleeve (6), a handle (7) and a pointing rod (8). The shaft sleeve (6) is bearing-connected to the upper end of the hollow shaft (5). The handle (7) is fixedly connected to the outer side of the shaft sleeve (6), and two handles (7) are provided. One end of the pointing rod (8) is also fixedly connected to the outer side of the shaft sleeve (6), and the other end of the pointing rod (8) is fixedly connected to the nozzle of the liquid discharge rubber tube (9). The corner of the pointing rod (8) is snap-fitted and slidably connected to the liquid collecting bin (10).

2. The curved movable underwater cavitation cleaning disc for ships according to claim 1, characterized in that: The arc angle of the arc plate (3) is less than 120° and greater than 100°. Three arc plates (3) are provided, and adjacent arc plates (3) are connected via rubber strips (4). The three arc plates (3) are connected to the outer ring side of the central disk body (1) via an annular rubber ring (2).

3. The curved movable underwater cavitation cleaning disc for ships according to claim 2, characterized in that: The nozzles (14) are distributed at equal angles in the middle and lower parts of the hollow rotating shaft (5).

4. The curved movable underwater cavitation cleaning disc for ships according to claim 3, characterized in that: The pointing rod (8) and the two handle bars (7) form a Y-shaped structure.

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